Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Copyright 2011 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com> |
| 4 | * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved. |
| 5 | * |
| 6 | * Authors: |
| 7 | * Paul Mackerras <paulus@au1.ibm.com> |
| 8 | * Alexander Graf <agraf@suse.de> |
| 9 | * Kevin Wolf <mail@kevin-wolf.de> |
| 10 | * |
| 11 | * Description: KVM functions specific to running on Book 3S |
| 12 | * processors in hypervisor mode (specifically POWER7 and later). |
| 13 | * |
| 14 | * This file is derived from arch/powerpc/kvm/book3s.c, |
| 15 | * by Alexander Graf <agraf@suse.de>. |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 16 | */ |
| 17 | |
| 18 | #include <linux/kvm_host.h> |
Thomas Meyer | 4bb817ed | 2017-09-03 14:19:31 +0200 | [diff] [blame] | 19 | #include <linux/kernel.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 20 | #include <linux/err.h> |
| 21 | #include <linux/slab.h> |
| 22 | #include <linux/preempt.h> |
Ingo Molnar | 174cd4b | 2017-02-02 19:15:33 +0100 | [diff] [blame] | 23 | #include <linux/sched/signal.h> |
Ingo Molnar | 03441a3 | 2017-02-08 18:51:35 +0100 | [diff] [blame] | 24 | #include <linux/sched/stat.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 25 | #include <linux/delay.h> |
Paul Gortmaker | 66b15db | 2011-05-27 10:46:24 -0400 | [diff] [blame] | 26 | #include <linux/export.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 27 | #include <linux/fs.h> |
| 28 | #include <linux/anon_inodes.h> |
Gavin Shan | 07f8ab25 | 2016-05-11 11:15:55 +1000 | [diff] [blame] | 29 | #include <linux/cpu.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 30 | #include <linux/cpumask.h> |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 31 | #include <linux/spinlock.h> |
| 32 | #include <linux/page-flags.h> |
Paul Mackerras | 2c9097e4 | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 33 | #include <linux/srcu.h> |
Alexander Graf | 398a76c | 2013-12-09 13:53:42 +0100 | [diff] [blame] | 34 | #include <linux/miscdevice.h> |
Paul Mackerras | e23a808 | 2015-03-28 14:21:01 +1100 | [diff] [blame] | 35 | #include <linux/debugfs.h> |
Benjamin Herrenschmidt | d398914 | 2017-04-05 17:54:51 +1000 | [diff] [blame] | 36 | #include <linux/gfp.h> |
| 37 | #include <linux/vmalloc.h> |
| 38 | #include <linux/highmem.h> |
| 39 | #include <linux/hugetlb.h> |
| 40 | #include <linux/kvm_irqfd.h> |
| 41 | #include <linux/irqbypass.h> |
| 42 | #include <linux/module.h> |
| 43 | #include <linux/compiler.h> |
| 44 | #include <linux/of.h> |
Christophe Leroy | e6f6390 | 2022-03-08 20:20:25 +0100 | [diff] [blame] | 45 | #include <linux/irqdomain.h> |
Valentin Schneider | 4c8c3c7 | 2023-03-07 14:35:56 +0000 | [diff] [blame] | 46 | #include <linux/smp.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 47 | |
Luke Dashjr | d6ee76d | 2018-08-16 21:36:26 +0000 | [diff] [blame] | 48 | #include <asm/ftrace.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 49 | #include <asm/reg.h> |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 50 | #include <asm/ppc-opcode.h> |
Nicholas Piggin | 6de6638 | 2017-11-05 23:33:55 +1100 | [diff] [blame] | 51 | #include <asm/asm-prototypes.h> |
Paul Mackerras | 4bad777 | 2018-10-08 16:31:06 +1100 | [diff] [blame] | 52 | #include <asm/archrandom.h> |
Nicholas Piggin | e303c08 | 2018-04-01 15:50:35 +1000 | [diff] [blame] | 53 | #include <asm/debug.h> |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 54 | #include <asm/disassemble.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 55 | #include <asm/cputable.h> |
| 56 | #include <asm/cacheflush.h> |
Linus Torvalds | 7c0f6ba | 2016-12-24 11:46:01 -0800 | [diff] [blame] | 57 | #include <linux/uaccess.h> |
Nicholas Piggin | 3a96570 | 2021-01-30 23:08:38 +1000 | [diff] [blame] | 58 | #include <asm/interrupt.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 59 | #include <asm/io.h> |
| 60 | #include <asm/kvm_ppc.h> |
| 61 | #include <asm/kvm_book3s.h> |
| 62 | #include <asm/mmu_context.h> |
| 63 | #include <asm/lppaca.h> |
Nicholas Piggin | 1782663 | 2021-08-12 02:00:43 +1000 | [diff] [blame] | 64 | #include <asm/pmc.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 65 | #include <asm/processor.h> |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 66 | #include <asm/cputhreads.h> |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 67 | #include <asm/page.h> |
Michael Neuling | de1d924 | 2011-11-09 20:39:49 +0000 | [diff] [blame] | 68 | #include <asm/hvcall.h> |
David Howells | ae3a197e | 2012-03-28 18:30:02 +0100 | [diff] [blame] | 69 | #include <asm/switch_to.h> |
Paul Mackerras | 512691d | 2012-10-15 01:15:41 +0000 | [diff] [blame] | 70 | #include <asm/smp.h> |
Paul Mackerras | 66feed6 | 2015-03-28 14:21:12 +1100 | [diff] [blame] | 71 | #include <asm/dbell.h> |
Mahesh Salgaonkar | fd7bacb | 2016-05-15 09:44:26 +0530 | [diff] [blame] | 72 | #include <asm/hmi.h> |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 73 | #include <asm/pnv-pci.h> |
Paul Mackerras | 7a84084 | 2016-11-16 22:25:20 +1100 | [diff] [blame] | 74 | #include <asm/mmu.h> |
Paul Mackerras | f725758 | 2016-11-18 09:02:08 +1100 | [diff] [blame] | 75 | #include <asm/opal.h> |
| 76 | #include <asm/xics.h> |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 77 | #include <asm/xive.h> |
Michael Neuling | c1fe190c | 2019-04-01 17:03:12 +1100 | [diff] [blame] | 78 | #include <asm/hw_breakpoint.h> |
Bharata B Rao | ca9f494 | 2019-11-25 08:36:26 +0530 | [diff] [blame] | 79 | #include <asm/kvm_book3s_uvmem.h> |
Bharata B Rao | c326225 | 2019-11-25 08:36:29 +0530 | [diff] [blame] | 80 | #include <asm/ultravisor.h> |
Peter Zijlstra | d6bdceb | 2020-05-29 22:41:01 +0200 | [diff] [blame] | 81 | #include <asm/dtl.h> |
Bharata B Rao | f0c6fbb | 2021-06-21 14:20:00 +0530 | [diff] [blame] | 82 | #include <asm/plpar_wrappers.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 83 | |
Valentin Schneider | 4c8c3c7 | 2023-03-07 14:35:56 +0000 | [diff] [blame] | 84 | #include <trace/events/ipi.h> |
| 85 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 86 | #include "book3s.h" |
Nicholas Piggin | aabcaf6 | 2021-11-23 19:52:07 +1000 | [diff] [blame] | 87 | #include "book3s_hv.h" |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 88 | |
Suresh E. Warrier | 3c78f78 | 2014-12-03 18:48:10 -0600 | [diff] [blame] | 89 | #define CREATE_TRACE_POINTS |
| 90 | #include "trace_hv.h" |
| 91 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 92 | /* #define EXIT_DEBUG */ |
| 93 | /* #define EXIT_DEBUG_SIMPLE */ |
| 94 | /* #define EXIT_DEBUG_INT */ |
| 95 | |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 96 | /* Used to indicate that a guest page fault needs to be handled */ |
| 97 | #define RESUME_PAGE_FAULT (RESUME_GUEST | RESUME_FLAG_ARCH1) |
Suresh Warrier | f7af520 | 2016-08-19 15:35:52 +1000 | [diff] [blame] | 98 | /* Used to indicate that a guest passthrough interrupt needs to be handled */ |
| 99 | #define RESUME_PASSTHROUGH (RESUME_GUEST | RESUME_FLAG_ARCH2) |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 100 | |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 101 | /* Used as a "null" value for timebase values */ |
| 102 | #define TB_NIL (~(u64)0) |
| 103 | |
Paul Mackerras | 699a0ea | 2014-06-02 11:02:59 +1000 | [diff] [blame] | 104 | static DECLARE_BITMAP(default_enabled_hcalls, MAX_HCALL_OPCODE/4 + 1); |
| 105 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 106 | static int dynamic_mt_modes = 6; |
Russell Currey | 57ad583f | 2017-01-12 14:54:13 +1100 | [diff] [blame] | 107 | module_param(dynamic_mt_modes, int, 0644); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 108 | MODULE_PARM_DESC(dynamic_mt_modes, "Set of allowed dynamic micro-threading modes: 0 (= none), 2, 4, or 6 (= 2 or 4)"); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 109 | static int target_smt_mode; |
Russell Currey | 57ad583f | 2017-01-12 14:54:13 +1100 | [diff] [blame] | 110 | module_param(target_smt_mode, int, 0644); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 111 | MODULE_PARM_DESC(target_smt_mode, "Target threads per core (0 = max)"); |
Stewart Smith | 9678cda | 2014-07-18 14:18:43 +1000 | [diff] [blame] | 112 | |
Paul Mackerras | aa22786 | 2018-09-12 10:42:12 +1000 | [diff] [blame] | 113 | static bool one_vm_per_core; |
| 114 | module_param(one_vm_per_core, bool, S_IRUGO | S_IWUSR); |
Nicholas Piggin | aaae8c7 | 2021-05-28 19:07:42 +1000 | [diff] [blame] | 115 | MODULE_PARM_DESC(one_vm_per_core, "Only run vCPUs from the same VM on a core (requires POWER8 or older)"); |
Paul Mackerras | aa22786 | 2018-09-12 10:42:12 +1000 | [diff] [blame] | 116 | |
Suresh E. Warrier | 520fe9c | 2015-12-21 16:33:57 -0600 | [diff] [blame] | 117 | #ifdef CONFIG_KVM_XICS |
Joe Perches | a4f1d94 | 2020-10-03 17:18:06 -0700 | [diff] [blame] | 118 | static const struct kernel_param_ops module_param_ops = { |
Suresh E. Warrier | 520fe9c | 2015-12-21 16:33:57 -0600 | [diff] [blame] | 119 | .set = param_set_int, |
| 120 | .get = param_get_int, |
| 121 | }; |
| 122 | |
Russell Currey | 57ad583f | 2017-01-12 14:54:13 +1100 | [diff] [blame] | 123 | module_param_cb(kvm_irq_bypass, &module_param_ops, &kvm_irq_bypass, 0644); |
Suresh Warrier | 644abbb | 2016-08-19 15:35:54 +1000 | [diff] [blame] | 124 | MODULE_PARM_DESC(kvm_irq_bypass, "Bypass passthrough interrupt optimization"); |
| 125 | |
Russell Currey | 57ad583f | 2017-01-12 14:54:13 +1100 | [diff] [blame] | 126 | module_param_cb(h_ipi_redirect, &module_param_ops, &h_ipi_redirect, 0644); |
Suresh E. Warrier | 520fe9c | 2015-12-21 16:33:57 -0600 | [diff] [blame] | 127 | MODULE_PARM_DESC(h_ipi_redirect, "Redirect H_IPI wakeup to a free host core"); |
| 128 | #endif |
| 129 | |
Paul Mackerras | aa069a9 | 2018-09-21 20:02:01 +1000 | [diff] [blame] | 130 | /* If set, guests are allowed to create and control nested guests */ |
| 131 | static bool nested = true; |
| 132 | module_param(nested, bool, S_IRUGO | S_IWUSR); |
| 133 | MODULE_PARM_DESC(nested, "Enable nested virtualization (only on POWER9)"); |
| 134 | |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 135 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 136 | |
Paul Mackerras | 7aa1584 | 2018-04-20 19:53:22 +1000 | [diff] [blame] | 137 | /* |
| 138 | * RWMR values for POWER8. These control the rate at which PURR |
| 139 | * and SPURR count and should be set according to the number of |
| 140 | * online threads in the vcore being run. |
| 141 | */ |
Nicholas Mc Guire | 0abb75b | 2018-07-07 11:07:25 +0200 | [diff] [blame] | 142 | #define RWMR_RPA_P8_1THREAD 0x164520C62609AECAUL |
| 143 | #define RWMR_RPA_P8_2THREAD 0x7FFF2908450D8DA9UL |
| 144 | #define RWMR_RPA_P8_3THREAD 0x164520C62609AECAUL |
| 145 | #define RWMR_RPA_P8_4THREAD 0x199A421245058DA9UL |
| 146 | #define RWMR_RPA_P8_5THREAD 0x164520C62609AECAUL |
| 147 | #define RWMR_RPA_P8_6THREAD 0x164520C62609AECAUL |
| 148 | #define RWMR_RPA_P8_7THREAD 0x164520C62609AECAUL |
| 149 | #define RWMR_RPA_P8_8THREAD 0x164520C62609AECAUL |
Paul Mackerras | 7aa1584 | 2018-04-20 19:53:22 +1000 | [diff] [blame] | 150 | |
| 151 | static unsigned long p8_rwmr_values[MAX_SMT_THREADS + 1] = { |
| 152 | RWMR_RPA_P8_1THREAD, |
| 153 | RWMR_RPA_P8_1THREAD, |
| 154 | RWMR_RPA_P8_2THREAD, |
| 155 | RWMR_RPA_P8_3THREAD, |
| 156 | RWMR_RPA_P8_4THREAD, |
| 157 | RWMR_RPA_P8_5THREAD, |
| 158 | RWMR_RPA_P8_6THREAD, |
| 159 | RWMR_RPA_P8_7THREAD, |
| 160 | RWMR_RPA_P8_8THREAD, |
| 161 | }; |
| 162 | |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 163 | static inline struct kvm_vcpu *next_runnable_thread(struct kvmppc_vcore *vc, |
| 164 | int *ip) |
| 165 | { |
| 166 | int i = *ip; |
| 167 | struct kvm_vcpu *vcpu; |
| 168 | |
| 169 | while (++i < MAX_SMT_THREADS) { |
| 170 | vcpu = READ_ONCE(vc->runnable_threads[i]); |
| 171 | if (vcpu) { |
| 172 | *ip = i; |
| 173 | return vcpu; |
| 174 | } |
| 175 | } |
| 176 | return NULL; |
| 177 | } |
| 178 | |
| 179 | /* Used to traverse the list of runnable threads for a given vcore */ |
| 180 | #define for_each_runnable_thread(i, vcpu, vc) \ |
| 181 | for (i = -1; (vcpu = next_runnable_thread(vc, &i)); ) |
| 182 | |
Paul Mackerras | 66feed6 | 2015-03-28 14:21:12 +1100 | [diff] [blame] | 183 | static bool kvmppc_ipi_thread(int cpu) |
| 184 | { |
Paul Mackerras | 1704a81 | 2016-11-18 08:47:08 +1100 | [diff] [blame] | 185 | unsigned long msg = PPC_DBELL_TYPE(PPC_DBELL_SERVER); |
| 186 | |
Paul Mackerras | f3c18e9 | 2018-10-08 16:31:05 +1100 | [diff] [blame] | 187 | /* If we're a nested hypervisor, fall back to ordinary IPIs for now */ |
| 188 | if (kvmhv_on_pseries()) |
| 189 | return false; |
| 190 | |
Paul Mackerras | 1704a81 | 2016-11-18 08:47:08 +1100 | [diff] [blame] | 191 | /* On POWER9 we can use msgsnd to IPI any cpu */ |
| 192 | if (cpu_has_feature(CPU_FTR_ARCH_300)) { |
| 193 | msg |= get_hard_smp_processor_id(cpu); |
| 194 | smp_mb(); |
| 195 | __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); |
| 196 | return true; |
| 197 | } |
| 198 | |
Paul Mackerras | 66feed6 | 2015-03-28 14:21:12 +1100 | [diff] [blame] | 199 | /* On POWER8 for IPIs to threads in the same core, use msgsnd */ |
| 200 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) { |
| 201 | preempt_disable(); |
| 202 | if (cpu_first_thread_sibling(cpu) == |
| 203 | cpu_first_thread_sibling(smp_processor_id())) { |
Paul Mackerras | 66feed6 | 2015-03-28 14:21:12 +1100 | [diff] [blame] | 204 | msg |= cpu_thread_in_core(cpu); |
| 205 | smp_mb(); |
| 206 | __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); |
| 207 | preempt_enable(); |
| 208 | return true; |
| 209 | } |
| 210 | preempt_enable(); |
| 211 | } |
| 212 | |
| 213 | #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP) |
Paul Mackerras | f725758 | 2016-11-18 09:02:08 +1100 | [diff] [blame] | 214 | if (cpu >= 0 && cpu < nr_cpu_ids) { |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 215 | if (paca_ptrs[cpu]->kvm_hstate.xics_phys) { |
Paul Mackerras | f725758 | 2016-11-18 09:02:08 +1100 | [diff] [blame] | 216 | xics_wake_cpu(cpu); |
| 217 | return true; |
| 218 | } |
| 219 | opal_int_set_mfrr(get_hard_smp_processor_id(cpu), IPI_PRIORITY); |
Paul Mackerras | 66feed6 | 2015-03-28 14:21:12 +1100 | [diff] [blame] | 220 | return true; |
| 221 | } |
| 222 | #endif |
| 223 | |
| 224 | return false; |
| 225 | } |
| 226 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 227 | static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu) |
Benjamin Herrenschmidt | 54695c3 | 2013-04-17 20:30:50 +0000 | [diff] [blame] | 228 | { |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 229 | int cpu; |
Davidlohr Bueso | da4ad88 | 2020-04-23 22:48:37 -0700 | [diff] [blame] | 230 | struct rcuwait *waitp; |
Benjamin Herrenschmidt | 54695c3 | 2013-04-17 20:30:50 +0000 | [diff] [blame] | 231 | |
Nicholas Piggin | c7fa848 | 2022-03-03 15:33:10 +1000 | [diff] [blame] | 232 | /* |
| 233 | * rcuwait_wake_up contains smp_mb() which orders prior stores that |
| 234 | * create pending work vs below loads of cpu fields. The other side |
| 235 | * is the barrier in vcpu run that orders setting the cpu fields vs |
| 236 | * testing for pending work. |
| 237 | */ |
| 238 | |
Davidlohr Bueso | da4ad88 | 2020-04-23 22:48:37 -0700 | [diff] [blame] | 239 | waitp = kvm_arch_vcpu_get_wait(vcpu); |
| 240 | if (rcuwait_wake_up(waitp)) |
Jing Zhang | 0193cc9 | 2021-06-18 22:27:03 +0000 | [diff] [blame] | 241 | ++vcpu->stat.generic.halt_wakeup; |
Benjamin Herrenschmidt | 54695c3 | 2013-04-17 20:30:50 +0000 | [diff] [blame] | 242 | |
Paul Mackerras | 3deda5e | 2016-12-20 14:02:29 +1100 | [diff] [blame] | 243 | cpu = READ_ONCE(vcpu->arch.thread_cpu); |
| 244 | if (cpu >= 0 && kvmppc_ipi_thread(cpu)) |
Paul Mackerras | 66feed6 | 2015-03-28 14:21:12 +1100 | [diff] [blame] | 245 | return; |
Benjamin Herrenschmidt | 54695c3 | 2013-04-17 20:30:50 +0000 | [diff] [blame] | 246 | |
| 247 | /* CPU points to the first thread of the core */ |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 248 | cpu = vcpu->cpu; |
Paul Mackerras | 66feed6 | 2015-03-28 14:21:12 +1100 | [diff] [blame] | 249 | if (cpu >= 0 && cpu < nr_cpu_ids && cpu_online(cpu)) |
| 250 | smp_send_reschedule(cpu); |
Benjamin Herrenschmidt | 54695c3 | 2013-04-17 20:30:50 +0000 | [diff] [blame] | 251 | } |
| 252 | |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 253 | /* |
| 254 | * We use the vcpu_load/put functions to measure stolen time. |
Nicholas Piggin | 1a5486b | 2022-09-08 23:25:44 +1000 | [diff] [blame] | 255 | * |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 256 | * Stolen time is counted as time when either the vcpu is able to |
| 257 | * run as part of a virtual core, but the task running the vcore |
| 258 | * is preempted or sleeping, or when the vcpu needs something done |
| 259 | * in the kernel by the task running the vcpu, but that task is |
| 260 | * preempted or sleeping. Those two things have to be counted |
| 261 | * separately, since one of the vcpu tasks will take on the job |
| 262 | * of running the core, and the other vcpu tasks in the vcore will |
| 263 | * sleep waiting for it to do that, but that sleep shouldn't count |
| 264 | * as stolen time. |
| 265 | * |
| 266 | * Hence we accumulate stolen time when the vcpu can run as part of |
| 267 | * a vcore using vc->stolen_tb, and the stolen time when the vcpu |
| 268 | * needs its task to do other things in the kernel (for example, |
| 269 | * service a page fault) in busy_stolen. We don't accumulate |
| 270 | * stolen time for a vcore when it is inactive, or for a vcpu |
| 271 | * when it is in state RUNNING or NOTREADY. NOTREADY is a bit of |
| 272 | * a misnomer; it means that the vcpu task is not executing in |
| 273 | * the KVM_VCPU_RUN ioctl, i.e. it is in userspace or elsewhere in |
| 274 | * the kernel. We don't have any way of dividing up that time |
| 275 | * between time that the vcpu is genuinely stopped, time that |
| 276 | * the task is actively working on behalf of the vcpu, and time |
| 277 | * that the task is preempted, so we don't count any of it as |
| 278 | * stolen. |
| 279 | * |
| 280 | * Updates to busy_stolen are protected by arch.tbacct_lock; |
Paul Mackerras | 2711e24 | 2014-12-04 16:43:28 +1100 | [diff] [blame] | 281 | * updates to vc->stolen_tb are protected by the vcore->stoltb_lock |
| 282 | * lock. The stolen times are measured in units of timebase ticks. |
| 283 | * (Note that the != TB_NIL checks below are purely defensive; |
| 284 | * they should never fail.) |
Nicholas Piggin | 1a5486b | 2022-09-08 23:25:44 +1000 | [diff] [blame] | 285 | * |
| 286 | * The POWER9 path is simpler, one vcpu per virtual core so the |
| 287 | * former case does not exist. If a vcpu is preempted when it is |
| 288 | * BUSY_IN_HOST and not ceded or otherwise blocked, then accumulate |
| 289 | * the stolen cycles in busy_stolen. RUNNING is not a preemptible |
| 290 | * state in the P9 path. |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 291 | */ |
| 292 | |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 293 | static void kvmppc_core_start_stolen(struct kvmppc_vcore *vc, u64 tb) |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 294 | { |
| 295 | unsigned long flags; |
| 296 | |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 297 | WARN_ON_ONCE(cpu_has_feature(CPU_FTR_ARCH_300)); |
| 298 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 299 | spin_lock_irqsave(&vc->stoltb_lock, flags); |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 300 | vc->preempt_tb = tb; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 301 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); |
| 302 | } |
| 303 | |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 304 | static void kvmppc_core_end_stolen(struct kvmppc_vcore *vc, u64 tb) |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 305 | { |
| 306 | unsigned long flags; |
| 307 | |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 308 | WARN_ON_ONCE(cpu_has_feature(CPU_FTR_ARCH_300)); |
| 309 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 310 | spin_lock_irqsave(&vc->stoltb_lock, flags); |
| 311 | if (vc->preempt_tb != TB_NIL) { |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 312 | vc->stolen_tb += tb - vc->preempt_tb; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 313 | vc->preempt_tb = TB_NIL; |
| 314 | } |
| 315 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); |
| 316 | } |
| 317 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 318 | static void kvmppc_core_vcpu_load_hv(struct kvm_vcpu *vcpu, int cpu) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 319 | { |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 320 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
Paul Mackerras | bf3d32e | 2013-11-16 17:46:04 +1100 | [diff] [blame] | 321 | unsigned long flags; |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 322 | u64 now; |
| 323 | |
Nicholas Piggin | 1a5486b | 2022-09-08 23:25:44 +1000 | [diff] [blame] | 324 | if (cpu_has_feature(CPU_FTR_ARCH_300)) { |
| 325 | if (vcpu->arch.busy_preempt != TB_NIL) { |
| 326 | WARN_ON_ONCE(vcpu->arch.state != KVMPPC_VCPU_BUSY_IN_HOST); |
| 327 | vc->stolen_tb += mftb() - vcpu->arch.busy_preempt; |
| 328 | vcpu->arch.busy_preempt = TB_NIL; |
| 329 | } |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 330 | return; |
Nicholas Piggin | 1a5486b | 2022-09-08 23:25:44 +1000 | [diff] [blame] | 331 | } |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 332 | |
| 333 | now = mftb(); |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 334 | |
Paul Mackerras | 2711e24 | 2014-12-04 16:43:28 +1100 | [diff] [blame] | 335 | /* |
| 336 | * We can test vc->runner without taking the vcore lock, |
| 337 | * because only this task ever sets vc->runner to this |
| 338 | * vcpu, and once it is set to this vcpu, only this task |
| 339 | * ever sets it to NULL. |
| 340 | */ |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 341 | if (vc->runner == vcpu && vc->vcore_state >= VCORE_SLEEPING) |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 342 | kvmppc_core_end_stolen(vc, now); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 343 | |
Paul Mackerras | 2711e24 | 2014-12-04 16:43:28 +1100 | [diff] [blame] | 344 | spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 345 | if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST && |
| 346 | vcpu->arch.busy_preempt != TB_NIL) { |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 347 | vcpu->arch.busy_stolen += now - vcpu->arch.busy_preempt; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 348 | vcpu->arch.busy_preempt = TB_NIL; |
| 349 | } |
Paul Mackerras | bf3d32e | 2013-11-16 17:46:04 +1100 | [diff] [blame] | 350 | spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 351 | } |
| 352 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 353 | static void kvmppc_core_vcpu_put_hv(struct kvm_vcpu *vcpu) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 354 | { |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 355 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
Paul Mackerras | bf3d32e | 2013-11-16 17:46:04 +1100 | [diff] [blame] | 356 | unsigned long flags; |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 357 | u64 now; |
| 358 | |
Nicholas Piggin | 1a5486b | 2022-09-08 23:25:44 +1000 | [diff] [blame] | 359 | if (cpu_has_feature(CPU_FTR_ARCH_300)) { |
| 360 | /* |
| 361 | * In the P9 path, RUNNABLE is not preemptible |
| 362 | * (nor takes host interrupts) |
| 363 | */ |
| 364 | WARN_ON_ONCE(vcpu->arch.state == KVMPPC_VCPU_RUNNABLE); |
| 365 | /* |
| 366 | * Account stolen time when preempted while the vcpu task is |
| 367 | * running in the kernel (but not in qemu, which is INACTIVE). |
| 368 | */ |
| 369 | if (task_is_running(current) && |
| 370 | vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST) |
| 371 | vcpu->arch.busy_preempt = mftb(); |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 372 | return; |
Nicholas Piggin | 1a5486b | 2022-09-08 23:25:44 +1000 | [diff] [blame] | 373 | } |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 374 | |
| 375 | now = mftb(); |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 376 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 377 | if (vc->runner == vcpu && vc->vcore_state >= VCORE_SLEEPING) |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 378 | kvmppc_core_start_stolen(vc, now); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 379 | |
Paul Mackerras | 2711e24 | 2014-12-04 16:43:28 +1100 | [diff] [blame] | 380 | spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 381 | if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST) |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 382 | vcpu->arch.busy_preempt = now; |
Paul Mackerras | bf3d32e | 2013-11-16 17:46:04 +1100 | [diff] [blame] | 383 | spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 384 | } |
| 385 | |
Thomas Huth | 5358a96 | 2015-05-22 09:25:02 +0200 | [diff] [blame] | 386 | static void kvmppc_set_pvr_hv(struct kvm_vcpu *vcpu, u32 pvr) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 387 | { |
| 388 | vcpu->arch.pvr = pvr; |
| 389 | } |
| 390 | |
Alistair Popple | 4cb4ade | 2020-06-02 15:53:25 +1000 | [diff] [blame] | 391 | /* Dummy value used in computing PCR value below */ |
| 392 | #define PCR_ARCH_31 (PCR_ARCH_300 << 1) |
| 393 | |
Amit Machhiwal | 20c8c4d | 2024-02-07 11:15:26 +0530 | [diff] [blame] | 394 | static inline unsigned long map_pcr_to_cap(unsigned long pcr) |
| 395 | { |
| 396 | unsigned long cap = 0; |
| 397 | |
| 398 | switch (pcr) { |
| 399 | case PCR_ARCH_300: |
| 400 | cap = H_GUEST_CAP_POWER9; |
| 401 | break; |
| 402 | case PCR_ARCH_31: |
| 403 | cap = H_GUEST_CAP_POWER10; |
| 404 | break; |
| 405 | default: |
| 406 | break; |
| 407 | } |
| 408 | |
| 409 | return cap; |
| 410 | } |
| 411 | |
Thomas Huth | 5358a96 | 2015-05-22 09:25:02 +0200 | [diff] [blame] | 412 | static int kvmppc_set_arch_compat(struct kvm_vcpu *vcpu, u32 arch_compat) |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 413 | { |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 414 | unsigned long host_pcr_bit = 0, guest_pcr_bit = 0, cap = 0; |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 415 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
| 416 | |
Suraj Jitindar Singh | 2ee13be3 | 2016-11-14 11:35:08 +1100 | [diff] [blame] | 417 | /* We can (emulate) our own architecture version and anything older */ |
Alistair Popple | 4cb4ade | 2020-06-02 15:53:25 +1000 | [diff] [blame] | 418 | if (cpu_has_feature(CPU_FTR_ARCH_31)) |
| 419 | host_pcr_bit = PCR_ARCH_31; |
| 420 | else if (cpu_has_feature(CPU_FTR_ARCH_300)) |
Suraj Jitindar Singh | 2ee13be3 | 2016-11-14 11:35:08 +1100 | [diff] [blame] | 421 | host_pcr_bit = PCR_ARCH_300; |
| 422 | else if (cpu_has_feature(CPU_FTR_ARCH_207S)) |
| 423 | host_pcr_bit = PCR_ARCH_207; |
| 424 | else if (cpu_has_feature(CPU_FTR_ARCH_206)) |
| 425 | host_pcr_bit = PCR_ARCH_206; |
| 426 | else |
| 427 | host_pcr_bit = PCR_ARCH_205; |
| 428 | |
| 429 | /* Determine lowest PCR bit needed to run guest in given PVR level */ |
| 430 | guest_pcr_bit = host_pcr_bit; |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 431 | if (arch_compat) { |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 432 | switch (arch_compat) { |
| 433 | case PVR_ARCH_205: |
Suraj Jitindar Singh | 2ee13be3 | 2016-11-14 11:35:08 +1100 | [diff] [blame] | 434 | guest_pcr_bit = PCR_ARCH_205; |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 435 | break; |
| 436 | case PVR_ARCH_206: |
| 437 | case PVR_ARCH_206p: |
Suraj Jitindar Singh | 2ee13be3 | 2016-11-14 11:35:08 +1100 | [diff] [blame] | 438 | guest_pcr_bit = PCR_ARCH_206; |
Paul Mackerras | 5557ae0 | 2014-01-08 21:25:24 +1100 | [diff] [blame] | 439 | break; |
| 440 | case PVR_ARCH_207: |
Suraj Jitindar Singh | 2ee13be3 | 2016-11-14 11:35:08 +1100 | [diff] [blame] | 441 | guest_pcr_bit = PCR_ARCH_207; |
| 442 | break; |
| 443 | case PVR_ARCH_300: |
| 444 | guest_pcr_bit = PCR_ARCH_300; |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 445 | break; |
Alistair Popple | 4cb4ade | 2020-06-02 15:53:25 +1000 | [diff] [blame] | 446 | case PVR_ARCH_31: |
Madhavan Srinivasan | c2ed087 | 2024-02-21 15:46:22 +1100 | [diff] [blame] | 447 | case PVR_ARCH_31_P11: |
Alistair Popple | 4cb4ade | 2020-06-02 15:53:25 +1000 | [diff] [blame] | 448 | guest_pcr_bit = PCR_ARCH_31; |
| 449 | break; |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 450 | default: |
| 451 | return -EINVAL; |
| 452 | } |
| 453 | } |
| 454 | |
Suraj Jitindar Singh | 2ee13be3 | 2016-11-14 11:35:08 +1100 | [diff] [blame] | 455 | /* Check requested PCR bits don't exceed our capabilities */ |
| 456 | if (guest_pcr_bit > host_pcr_bit) |
| 457 | return -EINVAL; |
| 458 | |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 459 | if (kvmhv_on_pseries() && kvmhv_is_nestedv2()) { |
Amit Machhiwal | 20c8c4d | 2024-02-07 11:15:26 +0530 | [diff] [blame] | 460 | /* |
| 461 | * 'arch_compat == 0' would mean the guest should default to |
| 462 | * L1's compatibility. In this case, the guest would pick |
| 463 | * host's PCR and evaluate the corresponding capabilities. |
| 464 | */ |
| 465 | cap = map_pcr_to_cap(guest_pcr_bit); |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 466 | if (!(cap & nested_capabilities)) |
| 467 | return -EINVAL; |
| 468 | } |
| 469 | |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 470 | spin_lock(&vc->lock); |
| 471 | vc->arch_compat = arch_compat; |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 472 | kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_LOGICAL_PVR); |
Jordan Niethe | 13c7bb3 | 2019-09-17 10:46:05 +1000 | [diff] [blame] | 473 | /* |
| 474 | * Set all PCR bits for which guest_pcr_bit <= bit < host_pcr_bit |
| 475 | * Also set all reserved PCR bits |
| 476 | */ |
| 477 | vc->pcr = (host_pcr_bit - guest_pcr_bit) | PCR_MASK; |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 478 | spin_unlock(&vc->lock); |
| 479 | |
| 480 | return 0; |
| 481 | } |
| 482 | |
Thomas Huth | 5358a96 | 2015-05-22 09:25:02 +0200 | [diff] [blame] | 483 | static void kvmppc_dump_regs(struct kvm_vcpu *vcpu) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 484 | { |
| 485 | int r; |
| 486 | |
| 487 | pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id); |
| 488 | pr_err("pc = %.16lx msr = %.16llx trap = %x\n", |
Simon Guo | 173c520 | 2018-05-07 14:20:08 +0800 | [diff] [blame] | 489 | vcpu->arch.regs.nip, vcpu->arch.shregs.msr, vcpu->arch.trap); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 490 | for (r = 0; r < 16; ++r) |
| 491 | pr_err("r%2d = %.16lx r%d = %.16lx\n", |
| 492 | r, kvmppc_get_gpr(vcpu, r), |
| 493 | r+16, kvmppc_get_gpr(vcpu, r+16)); |
| 494 | pr_err("ctr = %.16lx lr = %.16lx\n", |
Simon Guo | 173c520 | 2018-05-07 14:20:08 +0800 | [diff] [blame] | 495 | vcpu->arch.regs.ctr, vcpu->arch.regs.link); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 496 | pr_err("srr0 = %.16llx srr1 = %.16llx\n", |
| 497 | vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1); |
| 498 | pr_err("sprg0 = %.16llx sprg1 = %.16llx\n", |
| 499 | vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1); |
| 500 | pr_err("sprg2 = %.16llx sprg3 = %.16llx\n", |
| 501 | vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3); |
Paul Mackerras | fd0944b | 2018-10-08 16:30:58 +1100 | [diff] [blame] | 502 | pr_err("cr = %.8lx xer = %.16lx dsisr = %.8x\n", |
| 503 | vcpu->arch.regs.ccr, vcpu->arch.regs.xer, vcpu->arch.shregs.dsisr); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 504 | pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar); |
| 505 | pr_err("fault dar = %.16lx dsisr = %.8x\n", |
| 506 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); |
| 507 | pr_err("SLB (%d entries):\n", vcpu->arch.slb_max); |
| 508 | for (r = 0; r < vcpu->arch.slb_max; ++r) |
| 509 | pr_err(" ESID = %.16llx VSID = %.16llx\n", |
| 510 | vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv); |
Paul Mackerras | 953e373 | 2023-03-08 17:35:23 +1100 | [diff] [blame] | 511 | pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.16lx\n", |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 512 | vcpu->arch.vcore->lpcr, vcpu->kvm->arch.sdr1, |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 513 | vcpu->arch.last_inst); |
| 514 | } |
| 515 | |
Thomas Huth | 5358a96 | 2015-05-22 09:25:02 +0200 | [diff] [blame] | 516 | static struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 517 | { |
Paul Mackerras | 5a3f493 | 2019-05-23 16:36:32 +1000 | [diff] [blame] | 518 | return kvm_get_vcpu_by_id(kvm, id); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 519 | } |
| 520 | |
| 521 | static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa) |
| 522 | { |
Anton Blanchard | f13c13a | 2013-08-07 02:01:26 +1000 | [diff] [blame] | 523 | vpa->__old_status |= LPPACA_OLD_SHARED_PROC; |
Alexander Graf | 0240755 | 2014-06-11 10:34:19 +0200 | [diff] [blame] | 524 | vpa->yield_count = cpu_to_be32(1); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 525 | } |
| 526 | |
Paul Mackerras | 55b665b | 2012-09-25 20:33:06 +0000 | [diff] [blame] | 527 | static int set_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *v, |
| 528 | unsigned long addr, unsigned long len) |
| 529 | { |
| 530 | /* check address is cacheline aligned */ |
| 531 | if (addr & (L1_CACHE_BYTES - 1)) |
| 532 | return -EINVAL; |
| 533 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 534 | if (v->next_gpa != addr || v->len != len) { |
| 535 | v->next_gpa = addr; |
| 536 | v->len = addr ? len : 0; |
| 537 | v->update_pending = 1; |
| 538 | } |
| 539 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 540 | return 0; |
| 541 | } |
| 542 | |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 543 | /* Length for a per-processor buffer is passed in at offset 4 in the buffer */ |
| 544 | struct reg_vpa { |
| 545 | u32 dummy; |
| 546 | union { |
Alexander Graf | 0240755 | 2014-06-11 10:34:19 +0200 | [diff] [blame] | 547 | __be16 hword; |
| 548 | __be32 word; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 549 | } length; |
| 550 | }; |
| 551 | |
| 552 | static int vpa_is_registered(struct kvmppc_vpa *vpap) |
| 553 | { |
| 554 | if (vpap->update_pending) |
| 555 | return vpap->next_gpa != 0; |
| 556 | return vpap->pinned_addr != NULL; |
| 557 | } |
| 558 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 559 | static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu, |
| 560 | unsigned long flags, |
| 561 | unsigned long vcpuid, unsigned long vpa) |
| 562 | { |
| 563 | struct kvm *kvm = vcpu->kvm; |
Paul Mackerras | 93e6024 | 2011-12-12 12:28:55 +0000 | [diff] [blame] | 564 | unsigned long len, nb; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 565 | void *va; |
| 566 | struct kvm_vcpu *tvcpu; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 567 | int err; |
| 568 | int subfunc; |
| 569 | struct kvmppc_vpa *vpap; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 570 | |
| 571 | tvcpu = kvmppc_find_vcpu(kvm, vcpuid); |
| 572 | if (!tvcpu) |
| 573 | return H_PARAMETER; |
| 574 | |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 575 | subfunc = (flags >> H_VPA_FUNC_SHIFT) & H_VPA_FUNC_MASK; |
| 576 | if (subfunc == H_VPA_REG_VPA || subfunc == H_VPA_REG_DTL || |
| 577 | subfunc == H_VPA_REG_SLB) { |
| 578 | /* Registering new area - address must be cache-line aligned */ |
| 579 | if ((vpa & (L1_CACHE_BYTES - 1)) || !vpa) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 580 | return H_PARAMETER; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 581 | |
| 582 | /* convert logical addr to kernel addr and read length */ |
Paul Mackerras | 93e6024 | 2011-12-12 12:28:55 +0000 | [diff] [blame] | 583 | va = kvmppc_pin_guest_page(kvm, vpa, &nb); |
| 584 | if (va == NULL) |
Paul Mackerras | b2b2f16 | 2011-12-12 12:28:21 +0000 | [diff] [blame] | 585 | return H_PARAMETER; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 586 | if (subfunc == H_VPA_REG_VPA) |
Alexander Graf | 0240755 | 2014-06-11 10:34:19 +0200 | [diff] [blame] | 587 | len = be16_to_cpu(((struct reg_vpa *)va)->length.hword); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 588 | else |
Alexander Graf | 0240755 | 2014-06-11 10:34:19 +0200 | [diff] [blame] | 589 | len = be32_to_cpu(((struct reg_vpa *)va)->length.word); |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 590 | kvmppc_unpin_guest_page(kvm, va, vpa, false); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 591 | |
| 592 | /* Check length */ |
| 593 | if (len > nb || len < sizeof(struct reg_vpa)) |
| 594 | return H_PARAMETER; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 595 | } else { |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 596 | vpa = 0; |
| 597 | len = 0; |
| 598 | } |
| 599 | |
| 600 | err = H_PARAMETER; |
| 601 | vpap = NULL; |
| 602 | spin_lock(&tvcpu->arch.vpa_update_lock); |
| 603 | |
| 604 | switch (subfunc) { |
| 605 | case H_VPA_REG_VPA: /* register VPA */ |
Nicholas Piggin | eaac112e | 2017-08-13 11:33:38 +1000 | [diff] [blame] | 606 | /* |
| 607 | * The size of our lppaca is 1kB because of the way we align |
| 608 | * it for the guest to avoid crossing a 4kB boundary. We only |
| 609 | * use 640 bytes of the structure though, so we should accept |
| 610 | * clients that set a size of 640. |
| 611 | */ |
Nicholas Piggin | 499dcd4 | 2018-02-14 01:08:13 +1000 | [diff] [blame] | 612 | BUILD_BUG_ON(sizeof(struct lppaca) != 640); |
| 613 | if (len < sizeof(struct lppaca)) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 614 | break; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 615 | vpap = &tvcpu->arch.vpa; |
| 616 | err = 0; |
| 617 | break; |
| 618 | |
| 619 | case H_VPA_REG_DTL: /* register DTL */ |
| 620 | if (len < sizeof(struct dtl_entry)) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 621 | break; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 622 | len -= len % sizeof(struct dtl_entry); |
| 623 | |
| 624 | /* Check that they have previously registered a VPA */ |
| 625 | err = H_RESOURCE; |
| 626 | if (!vpa_is_registered(&tvcpu->arch.vpa)) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 627 | break; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 628 | |
| 629 | vpap = &tvcpu->arch.dtl; |
| 630 | err = 0; |
| 631 | break; |
| 632 | |
| 633 | case H_VPA_REG_SLB: /* register SLB shadow buffer */ |
| 634 | /* Check that they have previously registered a VPA */ |
| 635 | err = H_RESOURCE; |
| 636 | if (!vpa_is_registered(&tvcpu->arch.vpa)) |
| 637 | break; |
| 638 | |
| 639 | vpap = &tvcpu->arch.slb_shadow; |
| 640 | err = 0; |
| 641 | break; |
| 642 | |
| 643 | case H_VPA_DEREG_VPA: /* deregister VPA */ |
| 644 | /* Check they don't still have a DTL or SLB buf registered */ |
| 645 | err = H_RESOURCE; |
| 646 | if (vpa_is_registered(&tvcpu->arch.dtl) || |
| 647 | vpa_is_registered(&tvcpu->arch.slb_shadow)) |
| 648 | break; |
| 649 | |
| 650 | vpap = &tvcpu->arch.vpa; |
| 651 | err = 0; |
| 652 | break; |
| 653 | |
| 654 | case H_VPA_DEREG_DTL: /* deregister DTL */ |
| 655 | vpap = &tvcpu->arch.dtl; |
| 656 | err = 0; |
| 657 | break; |
| 658 | |
| 659 | case H_VPA_DEREG_SLB: /* deregister SLB shadow buffer */ |
| 660 | vpap = &tvcpu->arch.slb_shadow; |
| 661 | err = 0; |
| 662 | break; |
| 663 | } |
| 664 | |
| 665 | if (vpap) { |
| 666 | vpap->next_gpa = vpa; |
| 667 | vpap->len = len; |
| 668 | vpap->update_pending = 1; |
| 669 | } |
| 670 | |
| 671 | spin_unlock(&tvcpu->arch.vpa_update_lock); |
| 672 | |
| 673 | return err; |
| 674 | } |
| 675 | |
Jordan Niethe | db1dcfae | 2023-12-01 18:56:15 +0530 | [diff] [blame] | 676 | static void kvmppc_update_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *vpap, |
| 677 | struct kvmppc_vpa *old_vpap) |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 678 | { |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 679 | struct kvm *kvm = vcpu->kvm; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 680 | void *va; |
| 681 | unsigned long nb; |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 682 | unsigned long gpa; |
| 683 | |
| 684 | /* |
| 685 | * We need to pin the page pointed to by vpap->next_gpa, |
| 686 | * but we can't call kvmppc_pin_guest_page under the lock |
| 687 | * as it does get_user_pages() and down_read(). So we |
| 688 | * have to drop the lock, pin the page, then get the lock |
| 689 | * again and check that a new area didn't get registered |
| 690 | * in the meantime. |
| 691 | */ |
| 692 | for (;;) { |
| 693 | gpa = vpap->next_gpa; |
| 694 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 695 | va = NULL; |
| 696 | nb = 0; |
| 697 | if (gpa) |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 698 | va = kvmppc_pin_guest_page(kvm, gpa, &nb); |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 699 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 700 | if (gpa == vpap->next_gpa) |
| 701 | break; |
| 702 | /* sigh... unpin that one and try again */ |
| 703 | if (va) |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 704 | kvmppc_unpin_guest_page(kvm, va, gpa, false); |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 705 | } |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 706 | |
| 707 | vpap->update_pending = 0; |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 708 | if (va && nb < vpap->len) { |
| 709 | /* |
| 710 | * If it's now too short, it must be that userspace |
| 711 | * has changed the mappings underlying guest memory, |
| 712 | * so unregister the region. |
| 713 | */ |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 714 | kvmppc_unpin_guest_page(kvm, va, gpa, false); |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 715 | va = NULL; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 716 | } |
Jordan Niethe | db1dcfae | 2023-12-01 18:56:15 +0530 | [diff] [blame] | 717 | *old_vpap = *vpap; |
| 718 | |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 719 | vpap->gpa = gpa; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 720 | vpap->pinned_addr = va; |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 721 | vpap->dirty = false; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 722 | if (va) |
| 723 | vpap->pinned_end = va + vpap->len; |
| 724 | } |
Paul Mackerras | 93e6024 | 2011-12-12 12:28:55 +0000 | [diff] [blame] | 725 | |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 726 | static void kvmppc_update_vpas(struct kvm_vcpu *vcpu) |
| 727 | { |
Jordan Niethe | db1dcfae | 2023-12-01 18:56:15 +0530 | [diff] [blame] | 728 | struct kvm *kvm = vcpu->kvm; |
| 729 | struct kvmppc_vpa old_vpa = { 0 }; |
| 730 | |
Paul Mackerras | 2f12f03 | 2012-10-15 01:17:17 +0000 | [diff] [blame] | 731 | if (!(vcpu->arch.vpa.update_pending || |
| 732 | vcpu->arch.slb_shadow.update_pending || |
| 733 | vcpu->arch.dtl.update_pending)) |
| 734 | return; |
| 735 | |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 736 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 737 | if (vcpu->arch.vpa.update_pending) { |
Jordan Niethe | db1dcfae | 2023-12-01 18:56:15 +0530 | [diff] [blame] | 738 | kvmppc_update_vpa(vcpu, &vcpu->arch.vpa, &old_vpa); |
| 739 | if (old_vpa.pinned_addr) { |
| 740 | if (kvmhv_is_nestedv2()) |
| 741 | kvmhv_nestedv2_set_vpa(vcpu, ~0ull); |
| 742 | kvmppc_unpin_guest_page(kvm, old_vpa.pinned_addr, old_vpa.gpa, |
| 743 | old_vpa.dirty); |
| 744 | } |
| 745 | if (vcpu->arch.vpa.pinned_addr) { |
Paul Mackerras | 55b665b | 2012-09-25 20:33:06 +0000 | [diff] [blame] | 746 | init_vpa(vcpu, vcpu->arch.vpa.pinned_addr); |
Jordan Niethe | db1dcfae | 2023-12-01 18:56:15 +0530 | [diff] [blame] | 747 | if (kvmhv_is_nestedv2()) |
| 748 | kvmhv_nestedv2_set_vpa(vcpu, __pa(vcpu->arch.vpa.pinned_addr)); |
| 749 | } |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 750 | } |
| 751 | if (vcpu->arch.dtl.update_pending) { |
Jordan Niethe | db1dcfae | 2023-12-01 18:56:15 +0530 | [diff] [blame] | 752 | kvmppc_update_vpa(vcpu, &vcpu->arch.dtl, &old_vpa); |
| 753 | if (old_vpa.pinned_addr) |
| 754 | kvmppc_unpin_guest_page(kvm, old_vpa.pinned_addr, old_vpa.gpa, |
| 755 | old_vpa.dirty); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 756 | vcpu->arch.dtl_ptr = vcpu->arch.dtl.pinned_addr; |
| 757 | vcpu->arch.dtl_index = 0; |
| 758 | } |
Jordan Niethe | db1dcfae | 2023-12-01 18:56:15 +0530 | [diff] [blame] | 759 | if (vcpu->arch.slb_shadow.update_pending) { |
| 760 | kvmppc_update_vpa(vcpu, &vcpu->arch.slb_shadow, &old_vpa); |
| 761 | if (old_vpa.pinned_addr) |
| 762 | kvmppc_unpin_guest_page(kvm, old_vpa.pinned_addr, old_vpa.gpa, |
| 763 | old_vpa.dirty); |
| 764 | } |
| 765 | |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 766 | spin_unlock(&vcpu->arch.vpa_update_lock); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 767 | } |
| 768 | |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 769 | /* |
| 770 | * Return the accumulated stolen time for the vcore up until `now'. |
| 771 | * The caller should hold the vcore lock. |
| 772 | */ |
| 773 | static u64 vcore_stolen_time(struct kvmppc_vcore *vc, u64 now) |
| 774 | { |
| 775 | u64 p; |
Paul Mackerras | 2711e24 | 2014-12-04 16:43:28 +1100 | [diff] [blame] | 776 | unsigned long flags; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 777 | |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 778 | WARN_ON_ONCE(cpu_has_feature(CPU_FTR_ARCH_300)); |
| 779 | |
Paul Mackerras | 2711e24 | 2014-12-04 16:43:28 +1100 | [diff] [blame] | 780 | spin_lock_irqsave(&vc->stoltb_lock, flags); |
| 781 | p = vc->stolen_tb; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 782 | if (vc->vcore_state != VCORE_INACTIVE && |
Paul Mackerras | 2711e24 | 2014-12-04 16:43:28 +1100 | [diff] [blame] | 783 | vc->preempt_tb != TB_NIL) |
| 784 | p += now - vc->preempt_tb; |
| 785 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 786 | return p; |
| 787 | } |
| 788 | |
Nicholas Piggin | 617326f | 2021-11-23 19:52:29 +1000 | [diff] [blame] | 789 | static void __kvmppc_create_dtl_entry(struct kvm_vcpu *vcpu, |
Nicholas Piggin | e4335f5 | 2022-09-08 23:25:45 +1000 | [diff] [blame] | 790 | struct lppaca *vpa, |
Nicholas Piggin | 617326f | 2021-11-23 19:52:29 +1000 | [diff] [blame] | 791 | unsigned int pcpu, u64 now, |
| 792 | unsigned long stolen) |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 793 | { |
| 794 | struct dtl_entry *dt; |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 795 | |
| 796 | dt = vcpu->arch.dtl_ptr; |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 797 | |
Nicholas Piggin | e4335f5 | 2022-09-08 23:25:45 +1000 | [diff] [blame] | 798 | if (!dt) |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 799 | return; |
Nicholas Piggin | 617326f | 2021-11-23 19:52:29 +1000 | [diff] [blame] | 800 | |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 801 | dt->dispatch_reason = 7; |
Nicholas Piggin | 617326f | 2021-11-23 19:52:29 +1000 | [diff] [blame] | 802 | dt->preempt_reason = 0; |
| 803 | dt->processor_id = cpu_to_be16(pcpu + vcpu->arch.ptid); |
Alexander Graf | 0240755 | 2014-06-11 10:34:19 +0200 | [diff] [blame] | 804 | dt->enqueue_to_dispatch_time = cpu_to_be32(stolen); |
Nicholas Piggin | 617326f | 2021-11-23 19:52:29 +1000 | [diff] [blame] | 805 | dt->ready_to_enqueue_time = 0; |
| 806 | dt->waiting_to_ready_time = 0; |
| 807 | dt->timebase = cpu_to_be64(now); |
| 808 | dt->fault_addr = 0; |
Alexander Graf | 0240755 | 2014-06-11 10:34:19 +0200 | [diff] [blame] | 809 | dt->srr0 = cpu_to_be64(kvmppc_get_pc(vcpu)); |
| 810 | dt->srr1 = cpu_to_be64(vcpu->arch.shregs.msr); |
Nicholas Piggin | 617326f | 2021-11-23 19:52:29 +1000 | [diff] [blame] | 811 | |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 812 | ++dt; |
| 813 | if (dt == vcpu->arch.dtl.pinned_end) |
| 814 | dt = vcpu->arch.dtl.pinned_addr; |
| 815 | vcpu->arch.dtl_ptr = dt; |
| 816 | /* order writing *dt vs. writing vpa->dtl_idx */ |
| 817 | smp_wmb(); |
Alexander Graf | 0240755 | 2014-06-11 10:34:19 +0200 | [diff] [blame] | 818 | vpa->dtl_idx = cpu_to_be64(++vcpu->arch.dtl_index); |
Nicholas Piggin | e4335f5 | 2022-09-08 23:25:45 +1000 | [diff] [blame] | 819 | |
| 820 | /* vcpu->arch.dtl.dirty is set by the caller */ |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 821 | } |
| 822 | |
Nicholas Piggin | e4335f5 | 2022-09-08 23:25:45 +1000 | [diff] [blame] | 823 | static void kvmppc_update_vpa_dispatch(struct kvm_vcpu *vcpu, |
| 824 | struct kvmppc_vcore *vc) |
Nicholas Piggin | 1a5486b | 2022-09-08 23:25:44 +1000 | [diff] [blame] | 825 | { |
Nicholas Piggin | e4335f5 | 2022-09-08 23:25:45 +1000 | [diff] [blame] | 826 | struct lppaca *vpa; |
Nicholas Piggin | 617326f | 2021-11-23 19:52:29 +1000 | [diff] [blame] | 827 | unsigned long stolen; |
| 828 | unsigned long core_stolen; |
| 829 | u64 now; |
| 830 | unsigned long flags; |
| 831 | |
Nicholas Piggin | e4335f5 | 2022-09-08 23:25:45 +1000 | [diff] [blame] | 832 | vpa = vcpu->arch.vpa.pinned_addr; |
| 833 | if (!vpa) |
| 834 | return; |
| 835 | |
Nicholas Piggin | 617326f | 2021-11-23 19:52:29 +1000 | [diff] [blame] | 836 | now = mftb(); |
| 837 | |
| 838 | core_stolen = vcore_stolen_time(vc, now); |
| 839 | stolen = core_stolen - vcpu->arch.stolen_logged; |
| 840 | vcpu->arch.stolen_logged = core_stolen; |
| 841 | spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); |
| 842 | stolen += vcpu->arch.busy_stolen; |
| 843 | vcpu->arch.busy_stolen = 0; |
| 844 | spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags); |
| 845 | |
Nicholas Piggin | e4335f5 | 2022-09-08 23:25:45 +1000 | [diff] [blame] | 846 | vpa->enqueue_dispatch_tb = cpu_to_be64(be64_to_cpu(vpa->enqueue_dispatch_tb) + stolen); |
| 847 | |
Jordan Niethe | c8ae9b3 | 2023-09-14 13:05:54 +1000 | [diff] [blame] | 848 | __kvmppc_create_dtl_entry(vcpu, vpa, vc->pcpu, now + kvmppc_get_tb_offset(vcpu), stolen); |
Nicholas Piggin | e4335f5 | 2022-09-08 23:25:45 +1000 | [diff] [blame] | 849 | |
| 850 | vcpu->arch.vpa.dirty = true; |
| 851 | } |
| 852 | |
| 853 | static void kvmppc_update_vpa_dispatch_p9(struct kvm_vcpu *vcpu, |
| 854 | struct kvmppc_vcore *vc, |
| 855 | u64 now) |
| 856 | { |
| 857 | struct lppaca *vpa; |
| 858 | unsigned long stolen; |
| 859 | unsigned long stolen_delta; |
| 860 | |
| 861 | vpa = vcpu->arch.vpa.pinned_addr; |
| 862 | if (!vpa) |
| 863 | return; |
| 864 | |
| 865 | stolen = vc->stolen_tb; |
| 866 | stolen_delta = stolen - vcpu->arch.stolen_logged; |
| 867 | vcpu->arch.stolen_logged = stolen; |
| 868 | |
| 869 | vpa->enqueue_dispatch_tb = cpu_to_be64(stolen); |
| 870 | |
| 871 | __kvmppc_create_dtl_entry(vcpu, vpa, vc->pcpu, now, stolen_delta); |
| 872 | |
| 873 | vcpu->arch.vpa.dirty = true; |
Nicholas Piggin | 617326f | 2021-11-23 19:52:29 +1000 | [diff] [blame] | 874 | } |
| 875 | |
Paul Mackerras | 1da4e2f | 2017-05-19 16:26:16 +1000 | [diff] [blame] | 876 | /* See if there is a doorbell interrupt pending for a vcpu */ |
| 877 | static bool kvmppc_doorbell_pending(struct kvm_vcpu *vcpu) |
| 878 | { |
| 879 | int thr; |
| 880 | struct kvmppc_vcore *vc; |
| 881 | |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 882 | if (vcpu->arch.doorbell_request) |
| 883 | return true; |
Nicholas Piggin | 6398326 | 2021-11-23 19:52:30 +1000 | [diff] [blame] | 884 | if (cpu_has_feature(CPU_FTR_ARCH_300)) |
| 885 | return false; |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 886 | /* |
| 887 | * Ensure that the read of vcore->dpdes comes after the read |
| 888 | * of vcpu->doorbell_request. This barrier matches the |
Palmer Dabbelt | 6fabc9f | 2019-04-25 12:53:39 -0700 | [diff] [blame] | 889 | * smp_wmb() in kvmppc_guest_entry_inject(). |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 890 | */ |
| 891 | smp_rmb(); |
Paul Mackerras | 1da4e2f | 2017-05-19 16:26:16 +1000 | [diff] [blame] | 892 | vc = vcpu->arch.vcore; |
| 893 | thr = vcpu->vcpu_id - vc->first_vcpuid; |
| 894 | return !!(vc->dpdes & (1 << thr)); |
| 895 | } |
| 896 | |
Michael Neuling | 9642382 | 2014-06-02 11:03:01 +1000 | [diff] [blame] | 897 | static bool kvmppc_power8_compatible(struct kvm_vcpu *vcpu) |
| 898 | { |
Jordan Niethe | c8ae9b3 | 2023-09-14 13:05:54 +1000 | [diff] [blame] | 899 | if (kvmppc_get_arch_compat(vcpu) >= PVR_ARCH_207) |
Michael Neuling | 9642382 | 2014-06-02 11:03:01 +1000 | [diff] [blame] | 900 | return true; |
Jordan Niethe | c8ae9b3 | 2023-09-14 13:05:54 +1000 | [diff] [blame] | 901 | if ((!kvmppc_get_arch_compat(vcpu)) && |
Michael Neuling | 9642382 | 2014-06-02 11:03:01 +1000 | [diff] [blame] | 902 | cpu_has_feature(CPU_FTR_ARCH_207S)) |
| 903 | return true; |
| 904 | return false; |
| 905 | } |
| 906 | |
| 907 | static int kvmppc_h_set_mode(struct kvm_vcpu *vcpu, unsigned long mflags, |
| 908 | unsigned long resource, unsigned long value1, |
| 909 | unsigned long value2) |
| 910 | { |
| 911 | switch (resource) { |
| 912 | case H_SET_MODE_RESOURCE_SET_CIABR: |
| 913 | if (!kvmppc_power8_compatible(vcpu)) |
| 914 | return H_P2; |
| 915 | if (value2) |
| 916 | return H_P4; |
| 917 | if (mflags) |
| 918 | return H_UNSUPPORTED_FLAG_START; |
| 919 | /* Guests can't breakpoint the hypervisor */ |
| 920 | if ((value1 & CIABR_PRIV) == CIABR_PRIV_HYPER) |
| 921 | return H_P3; |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 922 | kvmppc_set_ciabr_hv(vcpu, value1); |
Michael Neuling | 9642382 | 2014-06-02 11:03:01 +1000 | [diff] [blame] | 923 | return H_SUCCESS; |
Ravi Bangoria | 6f3fe29 | 2020-07-23 14:38:10 +0530 | [diff] [blame] | 924 | case H_SET_MODE_RESOURCE_SET_DAWR0: |
Michael Neuling | 9642382 | 2014-06-02 11:03:01 +1000 | [diff] [blame] | 925 | if (!kvmppc_power8_compatible(vcpu)) |
| 926 | return H_P2; |
Michael Neuling | 398e712 | 2018-03-27 15:37:20 +1100 | [diff] [blame] | 927 | if (!ppc_breakpoint_available()) |
| 928 | return H_P2; |
Michael Neuling | 9642382 | 2014-06-02 11:03:01 +1000 | [diff] [blame] | 929 | if (mflags) |
| 930 | return H_UNSUPPORTED_FLAG_START; |
| 931 | if (value2 & DABRX_HYP) |
| 932 | return H_P4; |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 933 | kvmppc_set_dawr0_hv(vcpu, value1); |
| 934 | kvmppc_set_dawrx0_hv(vcpu, value2); |
Michael Neuling | 9642382 | 2014-06-02 11:03:01 +1000 | [diff] [blame] | 935 | return H_SUCCESS; |
Ravi Bangoria | bd1de1a | 2020-12-16 16:12:18 +0530 | [diff] [blame] | 936 | case H_SET_MODE_RESOURCE_SET_DAWR1: |
| 937 | if (!kvmppc_power8_compatible(vcpu)) |
| 938 | return H_P2; |
| 939 | if (!ppc_breakpoint_available()) |
| 940 | return H_P2; |
| 941 | if (!cpu_has_feature(CPU_FTR_DAWR1)) |
| 942 | return H_P2; |
| 943 | if (!vcpu->kvm->arch.dawr1_enabled) |
| 944 | return H_FUNCTION; |
| 945 | if (mflags) |
| 946 | return H_UNSUPPORTED_FLAG_START; |
| 947 | if (value2 & DABRX_HYP) |
| 948 | return H_P4; |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 949 | kvmppc_set_dawr1_hv(vcpu, value1); |
| 950 | kvmppc_set_dawrx1_hv(vcpu, value2); |
Ravi Bangoria | bd1de1a | 2020-12-16 16:12:18 +0530 | [diff] [blame] | 951 | return H_SUCCESS; |
Nicholas Piggin | 55d7004 | 2019-10-02 16:00:25 +1000 | [diff] [blame] | 952 | case H_SET_MODE_RESOURCE_ADDR_TRANS_MODE: |
Nicholas Piggin | bcc92a0 | 2021-04-12 11:48:37 +1000 | [diff] [blame] | 953 | /* |
| 954 | * KVM does not support mflags=2 (AIL=2) and AIL=1 is reserved. |
| 955 | * Keep this in synch with kvmppc_filter_guest_lpcr_hv. |
| 956 | */ |
Nicholas Piggin | 2e1ae9cd | 2021-05-28 19:07:41 +1000 | [diff] [blame] | 957 | if (cpu_has_feature(CPU_FTR_P9_RADIX_PREFETCH_BUG) && |
| 958 | kvmhv_vcpu_is_radix(vcpu) && mflags == 3) |
Nicholas Piggin | 55d7004 | 2019-10-02 16:00:25 +1000 | [diff] [blame] | 959 | return H_UNSUPPORTED_FLAG_START; |
| 960 | return H_TOO_HARD; |
Michael Neuling | 9642382 | 2014-06-02 11:03:01 +1000 | [diff] [blame] | 961 | default: |
| 962 | return H_TOO_HARD; |
| 963 | } |
| 964 | } |
| 965 | |
Suraj Jitindar Singh | 2d34d1c | 2019-03-22 17:05:44 +1100 | [diff] [blame] | 966 | /* Copy guest memory in place - must reside within a single memslot */ |
| 967 | static int kvmppc_copy_guest(struct kvm *kvm, gpa_t to, gpa_t from, |
| 968 | unsigned long len) |
| 969 | { |
| 970 | struct kvm_memory_slot *to_memslot = NULL; |
| 971 | struct kvm_memory_slot *from_memslot = NULL; |
| 972 | unsigned long to_addr, from_addr; |
| 973 | int r; |
| 974 | |
| 975 | /* Get HPA for from address */ |
| 976 | from_memslot = gfn_to_memslot(kvm, from >> PAGE_SHIFT); |
| 977 | if (!from_memslot) |
| 978 | return -EFAULT; |
| 979 | if ((from + len) >= ((from_memslot->base_gfn + from_memslot->npages) |
| 980 | << PAGE_SHIFT)) |
| 981 | return -EINVAL; |
| 982 | from_addr = gfn_to_hva_memslot(from_memslot, from >> PAGE_SHIFT); |
| 983 | if (kvm_is_error_hva(from_addr)) |
| 984 | return -EFAULT; |
| 985 | from_addr |= (from & (PAGE_SIZE - 1)); |
| 986 | |
| 987 | /* Get HPA for to address */ |
| 988 | to_memslot = gfn_to_memslot(kvm, to >> PAGE_SHIFT); |
| 989 | if (!to_memslot) |
| 990 | return -EFAULT; |
| 991 | if ((to + len) >= ((to_memslot->base_gfn + to_memslot->npages) |
| 992 | << PAGE_SHIFT)) |
| 993 | return -EINVAL; |
| 994 | to_addr = gfn_to_hva_memslot(to_memslot, to >> PAGE_SHIFT); |
| 995 | if (kvm_is_error_hva(to_addr)) |
| 996 | return -EFAULT; |
| 997 | to_addr |= (to & (PAGE_SIZE - 1)); |
| 998 | |
| 999 | /* Perform copy */ |
| 1000 | r = raw_copy_in_user((void __user *)to_addr, (void __user *)from_addr, |
| 1001 | len); |
| 1002 | if (r) |
| 1003 | return -EFAULT; |
| 1004 | mark_page_dirty(kvm, to >> PAGE_SHIFT); |
| 1005 | return 0; |
| 1006 | } |
| 1007 | |
| 1008 | static long kvmppc_h_page_init(struct kvm_vcpu *vcpu, unsigned long flags, |
| 1009 | unsigned long dest, unsigned long src) |
| 1010 | { |
| 1011 | u64 pg_sz = SZ_4K; /* 4K page size */ |
| 1012 | u64 pg_mask = SZ_4K - 1; |
| 1013 | int ret; |
| 1014 | |
| 1015 | /* Check for invalid flags (H_PAGE_SET_LOANED covers all CMO flags) */ |
| 1016 | if (flags & ~(H_ICACHE_INVALIDATE | H_ICACHE_SYNCHRONIZE | |
| 1017 | H_ZERO_PAGE | H_COPY_PAGE | H_PAGE_SET_LOANED)) |
| 1018 | return H_PARAMETER; |
| 1019 | |
| 1020 | /* dest (and src if copy_page flag set) must be page aligned */ |
| 1021 | if ((dest & pg_mask) || ((flags & H_COPY_PAGE) && (src & pg_mask))) |
| 1022 | return H_PARAMETER; |
| 1023 | |
| 1024 | /* zero and/or copy the page as determined by the flags */ |
| 1025 | if (flags & H_COPY_PAGE) { |
| 1026 | ret = kvmppc_copy_guest(vcpu->kvm, dest, src, pg_sz); |
| 1027 | if (ret < 0) |
| 1028 | return H_PARAMETER; |
| 1029 | } else if (flags & H_ZERO_PAGE) { |
| 1030 | ret = kvm_clear_guest(vcpu->kvm, dest, pg_sz); |
| 1031 | if (ret < 0) |
| 1032 | return H_PARAMETER; |
| 1033 | } |
| 1034 | |
| 1035 | /* We can ignore the remaining flags */ |
| 1036 | |
| 1037 | return H_SUCCESS; |
| 1038 | } |
| 1039 | |
Sam Bobroff | 90fd09f | 2014-12-03 13:30:40 +1100 | [diff] [blame] | 1040 | static int kvm_arch_vcpu_yield_to(struct kvm_vcpu *target) |
| 1041 | { |
| 1042 | struct kvmppc_vcore *vcore = target->arch.vcore; |
| 1043 | |
| 1044 | /* |
| 1045 | * We expect to have been called by the real mode handler |
| 1046 | * (kvmppc_rm_h_confer()) which would have directly returned |
| 1047 | * H_SUCCESS if the source vcore wasn't idle (e.g. if it may |
| 1048 | * have useful work to do and should not confer) so we don't |
| 1049 | * recheck that here. |
Nicholas Piggin | 9dc2bab | 2021-05-28 19:07:33 +1000 | [diff] [blame] | 1050 | * |
| 1051 | * In the case of the P9 single vcpu per vcore case, the real |
| 1052 | * mode handler is not called but no other threads are in the |
| 1053 | * source vcore. |
Sam Bobroff | 90fd09f | 2014-12-03 13:30:40 +1100 | [diff] [blame] | 1054 | */ |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 1055 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) { |
| 1056 | spin_lock(&vcore->lock); |
| 1057 | if (target->arch.state == KVMPPC_VCPU_RUNNABLE && |
| 1058 | vcore->vcore_state != VCORE_INACTIVE && |
| 1059 | vcore->runner) |
| 1060 | target = vcore->runner; |
| 1061 | spin_unlock(&vcore->lock); |
| 1062 | } |
Sam Bobroff | 90fd09f | 2014-12-03 13:30:40 +1100 | [diff] [blame] | 1063 | |
| 1064 | return kvm_vcpu_yield_to(target); |
| 1065 | } |
| 1066 | |
| 1067 | static int kvmppc_get_yield_count(struct kvm_vcpu *vcpu) |
| 1068 | { |
| 1069 | int yield_count = 0; |
| 1070 | struct lppaca *lppaca; |
| 1071 | |
| 1072 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 1073 | lppaca = (struct lppaca *)vcpu->arch.vpa.pinned_addr; |
| 1074 | if (lppaca) |
Paul Mackerras | ecb6d61 | 2015-03-20 20:39:39 +1100 | [diff] [blame] | 1075 | yield_count = be32_to_cpu(lppaca->yield_count); |
Sam Bobroff | 90fd09f | 2014-12-03 13:30:40 +1100 | [diff] [blame] | 1076 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 1077 | return yield_count; |
| 1078 | } |
| 1079 | |
Bharata B Rao | 53324b5 | 2021-06-21 14:20:01 +0530 | [diff] [blame] | 1080 | /* |
| 1081 | * H_RPT_INVALIDATE hcall handler for nested guests. |
| 1082 | * |
| 1083 | * Handles only nested process-scoped invalidation requests in L0. |
| 1084 | */ |
| 1085 | static int kvmppc_nested_h_rpt_invalidate(struct kvm_vcpu *vcpu) |
| 1086 | { |
| 1087 | unsigned long type = kvmppc_get_gpr(vcpu, 6); |
| 1088 | unsigned long pid, pg_sizes, start, end; |
| 1089 | |
| 1090 | /* |
| 1091 | * The partition-scoped invalidations aren't handled here in L0. |
| 1092 | */ |
| 1093 | if (type & H_RPTI_TYPE_NESTED) |
| 1094 | return RESUME_HOST; |
| 1095 | |
| 1096 | pid = kvmppc_get_gpr(vcpu, 4); |
| 1097 | pg_sizes = kvmppc_get_gpr(vcpu, 7); |
| 1098 | start = kvmppc_get_gpr(vcpu, 8); |
| 1099 | end = kvmppc_get_gpr(vcpu, 9); |
| 1100 | |
| 1101 | do_h_rpt_invalidate_prt(pid, vcpu->arch.nested->shadow_lpid, |
| 1102 | type, pg_sizes, start, end); |
| 1103 | |
| 1104 | kvmppc_set_gpr(vcpu, 3, H_SUCCESS); |
| 1105 | return RESUME_GUEST; |
| 1106 | } |
| 1107 | |
Bharata B Rao | f0c6fbb | 2021-06-21 14:20:00 +0530 | [diff] [blame] | 1108 | static long kvmppc_h_rpt_invalidate(struct kvm_vcpu *vcpu, |
| 1109 | unsigned long id, unsigned long target, |
| 1110 | unsigned long type, unsigned long pg_sizes, |
| 1111 | unsigned long start, unsigned long end) |
| 1112 | { |
| 1113 | if (!kvm_is_radix(vcpu->kvm)) |
| 1114 | return H_UNSUPPORTED; |
| 1115 | |
| 1116 | if (end < start) |
| 1117 | return H_P5; |
| 1118 | |
| 1119 | /* |
| 1120 | * Partition-scoped invalidation for nested guests. |
Bharata B Rao | f0c6fbb | 2021-06-21 14:20:00 +0530 | [diff] [blame] | 1121 | */ |
Bharata B Rao | 53324b5 | 2021-06-21 14:20:01 +0530 | [diff] [blame] | 1122 | if (type & H_RPTI_TYPE_NESTED) { |
| 1123 | if (!nesting_enabled(vcpu->kvm)) |
| 1124 | return H_FUNCTION; |
| 1125 | |
| 1126 | /* Support only cores as target */ |
| 1127 | if (target != H_RPTI_TARGET_CMMU) |
| 1128 | return H_P2; |
| 1129 | |
| 1130 | return do_h_rpt_invalidate_pat(vcpu, id, type, pg_sizes, |
| 1131 | start, end); |
| 1132 | } |
Bharata B Rao | f0c6fbb | 2021-06-21 14:20:00 +0530 | [diff] [blame] | 1133 | |
| 1134 | /* |
| 1135 | * Process-scoped invalidation for L1 guests. |
| 1136 | */ |
| 1137 | do_h_rpt_invalidate_prt(id, vcpu->kvm->arch.lpid, |
| 1138 | type, pg_sizes, start, end); |
| 1139 | return H_SUCCESS; |
| 1140 | } |
| 1141 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1142 | int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) |
| 1143 | { |
Nicholas Piggin | a9aa86e | 2021-05-28 19:07:47 +1000 | [diff] [blame] | 1144 | struct kvm *kvm = vcpu->kvm; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1145 | unsigned long req = kvmppc_get_gpr(vcpu, 3); |
| 1146 | unsigned long target, ret = H_SUCCESS; |
Sam Bobroff | 90fd09f | 2014-12-03 13:30:40 +1100 | [diff] [blame] | 1147 | int yield_count; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1148 | struct kvm_vcpu *tvcpu; |
Michael Ellerman | 8e591cb | 2013-04-17 20:30:00 +0000 | [diff] [blame] | 1149 | int idx, rc; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1150 | |
Paul Mackerras | 699a0ea | 2014-06-02 11:02:59 +1000 | [diff] [blame] | 1151 | if (req <= MAX_HCALL_OPCODE && |
| 1152 | !test_bit(req/4, vcpu->kvm->arch.enabled_hcalls)) |
| 1153 | return RESUME_HOST; |
| 1154 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1155 | switch (req) { |
Nicholas Piggin | 6165d5d | 2021-05-28 19:07:48 +1000 | [diff] [blame] | 1156 | case H_REMOVE: |
| 1157 | ret = kvmppc_h_remove(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 1158 | kvmppc_get_gpr(vcpu, 5), |
| 1159 | kvmppc_get_gpr(vcpu, 6)); |
| 1160 | if (ret == H_TOO_HARD) |
| 1161 | return RESUME_HOST; |
| 1162 | break; |
| 1163 | case H_ENTER: |
| 1164 | ret = kvmppc_h_enter(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 1165 | kvmppc_get_gpr(vcpu, 5), |
| 1166 | kvmppc_get_gpr(vcpu, 6), |
| 1167 | kvmppc_get_gpr(vcpu, 7)); |
| 1168 | if (ret == H_TOO_HARD) |
| 1169 | return RESUME_HOST; |
| 1170 | break; |
| 1171 | case H_READ: |
| 1172 | ret = kvmppc_h_read(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 1173 | kvmppc_get_gpr(vcpu, 5)); |
| 1174 | if (ret == H_TOO_HARD) |
| 1175 | return RESUME_HOST; |
| 1176 | break; |
| 1177 | case H_CLEAR_MOD: |
| 1178 | ret = kvmppc_h_clear_mod(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 1179 | kvmppc_get_gpr(vcpu, 5)); |
| 1180 | if (ret == H_TOO_HARD) |
| 1181 | return RESUME_HOST; |
| 1182 | break; |
| 1183 | case H_CLEAR_REF: |
| 1184 | ret = kvmppc_h_clear_ref(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 1185 | kvmppc_get_gpr(vcpu, 5)); |
| 1186 | if (ret == H_TOO_HARD) |
| 1187 | return RESUME_HOST; |
| 1188 | break; |
| 1189 | case H_PROTECT: |
| 1190 | ret = kvmppc_h_protect(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 1191 | kvmppc_get_gpr(vcpu, 5), |
| 1192 | kvmppc_get_gpr(vcpu, 6)); |
| 1193 | if (ret == H_TOO_HARD) |
| 1194 | return RESUME_HOST; |
| 1195 | break; |
| 1196 | case H_BULK_REMOVE: |
| 1197 | ret = kvmppc_h_bulk_remove(vcpu); |
| 1198 | if (ret == H_TOO_HARD) |
| 1199 | return RESUME_HOST; |
| 1200 | break; |
| 1201 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1202 | case H_CEDE: |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1203 | break; |
| 1204 | case H_PROD: |
| 1205 | target = kvmppc_get_gpr(vcpu, 4); |
Nicholas Piggin | a9aa86e | 2021-05-28 19:07:47 +1000 | [diff] [blame] | 1206 | tvcpu = kvmppc_find_vcpu(kvm, target); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1207 | if (!tvcpu) { |
| 1208 | ret = H_PARAMETER; |
| 1209 | break; |
| 1210 | } |
| 1211 | tvcpu->arch.prodded = 1; |
Nicholas Piggin | c7fa848 | 2022-03-03 15:33:10 +1000 | [diff] [blame] | 1212 | smp_mb(); /* This orders prodded store vs ceded load */ |
Paul Mackerras | 8464c88 | 2016-12-06 20:42:05 +1100 | [diff] [blame] | 1213 | if (tvcpu->arch.ceded) |
| 1214 | kvmppc_fast_vcpu_kick_hv(tvcpu); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1215 | break; |
| 1216 | case H_CONFER: |
Paul Mackerras | 42d7604 | 2013-09-06 13:23:21 +1000 | [diff] [blame] | 1217 | target = kvmppc_get_gpr(vcpu, 4); |
| 1218 | if (target == -1) |
| 1219 | break; |
Nicholas Piggin | a9aa86e | 2021-05-28 19:07:47 +1000 | [diff] [blame] | 1220 | tvcpu = kvmppc_find_vcpu(kvm, target); |
Paul Mackerras | 42d7604 | 2013-09-06 13:23:21 +1000 | [diff] [blame] | 1221 | if (!tvcpu) { |
| 1222 | ret = H_PARAMETER; |
| 1223 | break; |
| 1224 | } |
Sam Bobroff | 90fd09f | 2014-12-03 13:30:40 +1100 | [diff] [blame] | 1225 | yield_count = kvmppc_get_gpr(vcpu, 5); |
| 1226 | if (kvmppc_get_yield_count(tvcpu) != yield_count) |
| 1227 | break; |
| 1228 | kvm_arch_vcpu_yield_to(tvcpu); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1229 | break; |
| 1230 | case H_REGISTER_VPA: |
| 1231 | ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 1232 | kvmppc_get_gpr(vcpu, 5), |
| 1233 | kvmppc_get_gpr(vcpu, 6)); |
| 1234 | break; |
Michael Ellerman | 8e591cb | 2013-04-17 20:30:00 +0000 | [diff] [blame] | 1235 | case H_RTAS: |
Nicholas Piggin | a9aa86e | 2021-05-28 19:07:47 +1000 | [diff] [blame] | 1236 | if (list_empty(&kvm->arch.rtas_tokens)) |
Michael Ellerman | 8e591cb | 2013-04-17 20:30:00 +0000 | [diff] [blame] | 1237 | return RESUME_HOST; |
| 1238 | |
Nicholas Piggin | a9aa86e | 2021-05-28 19:07:47 +1000 | [diff] [blame] | 1239 | idx = srcu_read_lock(&kvm->srcu); |
Michael Ellerman | 8e591cb | 2013-04-17 20:30:00 +0000 | [diff] [blame] | 1240 | rc = kvmppc_rtas_hcall(vcpu); |
Nicholas Piggin | a9aa86e | 2021-05-28 19:07:47 +1000 | [diff] [blame] | 1241 | srcu_read_unlock(&kvm->srcu, idx); |
Michael Ellerman | 8e591cb | 2013-04-17 20:30:00 +0000 | [diff] [blame] | 1242 | |
| 1243 | if (rc == -ENOENT) |
| 1244 | return RESUME_HOST; |
| 1245 | else if (rc == 0) |
| 1246 | break; |
| 1247 | |
| 1248 | /* Send the error out to userspace via KVM_RUN */ |
| 1249 | return rc; |
David Gibson | 99342cf8 | 2015-02-05 11:53:25 +1100 | [diff] [blame] | 1250 | case H_LOGICAL_CI_LOAD: |
| 1251 | ret = kvmppc_h_logical_ci_load(vcpu); |
| 1252 | if (ret == H_TOO_HARD) |
| 1253 | return RESUME_HOST; |
| 1254 | break; |
| 1255 | case H_LOGICAL_CI_STORE: |
| 1256 | ret = kvmppc_h_logical_ci_store(vcpu); |
| 1257 | if (ret == H_TOO_HARD) |
| 1258 | return RESUME_HOST; |
| 1259 | break; |
Michael Neuling | 9642382 | 2014-06-02 11:03:01 +1000 | [diff] [blame] | 1260 | case H_SET_MODE: |
| 1261 | ret = kvmppc_h_set_mode(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 1262 | kvmppc_get_gpr(vcpu, 5), |
| 1263 | kvmppc_get_gpr(vcpu, 6), |
| 1264 | kvmppc_get_gpr(vcpu, 7)); |
| 1265 | if (ret == H_TOO_HARD) |
| 1266 | return RESUME_HOST; |
| 1267 | break; |
Benjamin Herrenschmidt | bc5ad3f | 2013-04-17 20:30:26 +0000 | [diff] [blame] | 1268 | case H_XIRR: |
| 1269 | case H_CPPR: |
| 1270 | case H_EOI: |
| 1271 | case H_IPI: |
Paul Mackerras | 8e44ddc | 2013-05-23 15:42:21 +0000 | [diff] [blame] | 1272 | case H_IPOLL: |
| 1273 | case H_XIRR_X: |
Benjamin Herrenschmidt | bc5ad3f | 2013-04-17 20:30:26 +0000 | [diff] [blame] | 1274 | if (kvmppc_xics_enabled(vcpu)) { |
Paul Mackerras | 03f9533 | 2019-02-04 22:07:20 +1100 | [diff] [blame] | 1275 | if (xics_on_xive()) { |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 1276 | ret = H_NOT_AVAILABLE; |
| 1277 | return RESUME_GUEST; |
| 1278 | } |
Benjamin Herrenschmidt | bc5ad3f | 2013-04-17 20:30:26 +0000 | [diff] [blame] | 1279 | ret = kvmppc_xics_hcall(vcpu, req); |
| 1280 | break; |
Alexey Kardashevskiy | d3695aa | 2016-02-15 12:55:09 +1100 | [diff] [blame] | 1281 | } |
| 1282 | return RESUME_HOST; |
Paul Mackerras | 4bad777 | 2018-10-08 16:31:06 +1100 | [diff] [blame] | 1283 | case H_SET_DABR: |
| 1284 | ret = kvmppc_h_set_dabr(vcpu, kvmppc_get_gpr(vcpu, 4)); |
| 1285 | break; |
| 1286 | case H_SET_XDABR: |
| 1287 | ret = kvmppc_h_set_xdabr(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 1288 | kvmppc_get_gpr(vcpu, 5)); |
| 1289 | break; |
Jordan Niethe | e40542a | 2019-02-21 14:28:48 +1100 | [diff] [blame] | 1290 | #ifdef CONFIG_SPAPR_TCE_IOMMU |
Paul Mackerras | 4bad777 | 2018-10-08 16:31:06 +1100 | [diff] [blame] | 1291 | case H_GET_TCE: |
| 1292 | ret = kvmppc_h_get_tce(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 1293 | kvmppc_get_gpr(vcpu, 5)); |
| 1294 | if (ret == H_TOO_HARD) |
| 1295 | return RESUME_HOST; |
| 1296 | break; |
Alexey Kardashevskiy | d3695aa | 2016-02-15 12:55:09 +1100 | [diff] [blame] | 1297 | case H_PUT_TCE: |
| 1298 | ret = kvmppc_h_put_tce(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 1299 | kvmppc_get_gpr(vcpu, 5), |
| 1300 | kvmppc_get_gpr(vcpu, 6)); |
| 1301 | if (ret == H_TOO_HARD) |
| 1302 | return RESUME_HOST; |
| 1303 | break; |
| 1304 | case H_PUT_TCE_INDIRECT: |
| 1305 | ret = kvmppc_h_put_tce_indirect(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 1306 | kvmppc_get_gpr(vcpu, 5), |
| 1307 | kvmppc_get_gpr(vcpu, 6), |
| 1308 | kvmppc_get_gpr(vcpu, 7)); |
| 1309 | if (ret == H_TOO_HARD) |
| 1310 | return RESUME_HOST; |
| 1311 | break; |
| 1312 | case H_STUFF_TCE: |
| 1313 | ret = kvmppc_h_stuff_tce(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 1314 | kvmppc_get_gpr(vcpu, 5), |
| 1315 | kvmppc_get_gpr(vcpu, 6), |
| 1316 | kvmppc_get_gpr(vcpu, 7)); |
| 1317 | if (ret == H_TOO_HARD) |
| 1318 | return RESUME_HOST; |
| 1319 | break; |
Jordan Niethe | e40542a | 2019-02-21 14:28:48 +1100 | [diff] [blame] | 1320 | #endif |
Jordan Niethe | 0e85b7d | 2023-09-14 13:05:50 +1000 | [diff] [blame] | 1321 | case H_RANDOM: { |
| 1322 | unsigned long rand; |
| 1323 | |
| 1324 | if (!arch_get_random_seed_longs(&rand, 1)) |
Paul Mackerras | 4bad777 | 2018-10-08 16:31:06 +1100 | [diff] [blame] | 1325 | ret = H_HARDWARE; |
Jordan Niethe | 0e85b7d | 2023-09-14 13:05:50 +1000 | [diff] [blame] | 1326 | kvmppc_set_gpr(vcpu, 4, rand); |
Paul Mackerras | 4bad777 | 2018-10-08 16:31:06 +1100 | [diff] [blame] | 1327 | break; |
Jordan Niethe | 0e85b7d | 2023-09-14 13:05:50 +1000 | [diff] [blame] | 1328 | } |
Bharata B Rao | f0c6fbb | 2021-06-21 14:20:00 +0530 | [diff] [blame] | 1329 | case H_RPT_INVALIDATE: |
| 1330 | ret = kvmppc_h_rpt_invalidate(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 1331 | kvmppc_get_gpr(vcpu, 5), |
| 1332 | kvmppc_get_gpr(vcpu, 6), |
| 1333 | kvmppc_get_gpr(vcpu, 7), |
| 1334 | kvmppc_get_gpr(vcpu, 8), |
| 1335 | kvmppc_get_gpr(vcpu, 9)); |
| 1336 | break; |
Paul Mackerras | 8e3f5fc | 2018-10-08 16:31:03 +1100 | [diff] [blame] | 1337 | |
| 1338 | case H_SET_PARTITION_TABLE: |
| 1339 | ret = H_FUNCTION; |
Nicholas Piggin | a9aa86e | 2021-05-28 19:07:47 +1000 | [diff] [blame] | 1340 | if (nesting_enabled(kvm)) |
Paul Mackerras | 8e3f5fc | 2018-10-08 16:31:03 +1100 | [diff] [blame] | 1341 | ret = kvmhv_set_partition_table(vcpu); |
| 1342 | break; |
| 1343 | case H_ENTER_NESTED: |
| 1344 | ret = H_FUNCTION; |
Nicholas Piggin | a9aa86e | 2021-05-28 19:07:47 +1000 | [diff] [blame] | 1345 | if (!nesting_enabled(kvm)) |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 1346 | break; |
| 1347 | ret = kvmhv_enter_nested_guest(vcpu); |
| 1348 | if (ret == H_INTERRUPT) { |
| 1349 | kvmppc_set_gpr(vcpu, 3, 0); |
Michael Roth | 6c08ec1 | 2018-11-08 21:27:23 -0600 | [diff] [blame] | 1350 | vcpu->arch.hcall_needed = 0; |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 1351 | return -EINTR; |
Suraj Jitindar Singh | 873db2c | 2018-12-14 16:29:08 +1100 | [diff] [blame] | 1352 | } else if (ret == H_TOO_HARD) { |
| 1353 | kvmppc_set_gpr(vcpu, 3, 0); |
| 1354 | vcpu->arch.hcall_needed = 0; |
| 1355 | return RESUME_HOST; |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 1356 | } |
Paul Mackerras | 8e3f5fc | 2018-10-08 16:31:03 +1100 | [diff] [blame] | 1357 | break; |
| 1358 | case H_TLB_INVALIDATE: |
| 1359 | ret = H_FUNCTION; |
Nicholas Piggin | a9aa86e | 2021-05-28 19:07:47 +1000 | [diff] [blame] | 1360 | if (nesting_enabled(kvm)) |
Paul Mackerras | aa069a9 | 2018-09-21 20:02:01 +1000 | [diff] [blame] | 1361 | ret = kvmhv_do_nested_tlbie(vcpu); |
Paul Mackerras | 8e3f5fc | 2018-10-08 16:31:03 +1100 | [diff] [blame] | 1362 | break; |
Suraj Jitindar Singh | 6ff887b | 2018-12-14 16:29:09 +1100 | [diff] [blame] | 1363 | case H_COPY_TOFROM_GUEST: |
| 1364 | ret = H_FUNCTION; |
Nicholas Piggin | a9aa86e | 2021-05-28 19:07:47 +1000 | [diff] [blame] | 1365 | if (nesting_enabled(kvm)) |
Suraj Jitindar Singh | 6ff887b | 2018-12-14 16:29:09 +1100 | [diff] [blame] | 1366 | ret = kvmhv_copy_tofrom_guest_nested(vcpu); |
| 1367 | break; |
Suraj Jitindar Singh | 2d34d1c | 2019-03-22 17:05:44 +1100 | [diff] [blame] | 1368 | case H_PAGE_INIT: |
| 1369 | ret = kvmppc_h_page_init(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 1370 | kvmppc_get_gpr(vcpu, 5), |
| 1371 | kvmppc_get_gpr(vcpu, 6)); |
| 1372 | break; |
Bharata B Rao | ca9f494 | 2019-11-25 08:36:26 +0530 | [diff] [blame] | 1373 | case H_SVM_PAGE_IN: |
Laurent Dufour | 8c47b6ff | 2020-03-20 11:26:42 +0100 | [diff] [blame] | 1374 | ret = H_UNSUPPORTED; |
| 1375 | if (kvmppc_get_srr1(vcpu) & MSR_S) |
Nicholas Piggin | a9aa86e | 2021-05-28 19:07:47 +1000 | [diff] [blame] | 1376 | ret = kvmppc_h_svm_page_in(kvm, |
Laurent Dufour | 8c47b6ff | 2020-03-20 11:26:42 +0100 | [diff] [blame] | 1377 | kvmppc_get_gpr(vcpu, 4), |
| 1378 | kvmppc_get_gpr(vcpu, 5), |
| 1379 | kvmppc_get_gpr(vcpu, 6)); |
Bharata B Rao | ca9f494 | 2019-11-25 08:36:26 +0530 | [diff] [blame] | 1380 | break; |
| 1381 | case H_SVM_PAGE_OUT: |
Laurent Dufour | 8c47b6ff | 2020-03-20 11:26:42 +0100 | [diff] [blame] | 1382 | ret = H_UNSUPPORTED; |
| 1383 | if (kvmppc_get_srr1(vcpu) & MSR_S) |
Nicholas Piggin | a9aa86e | 2021-05-28 19:07:47 +1000 | [diff] [blame] | 1384 | ret = kvmppc_h_svm_page_out(kvm, |
Laurent Dufour | 8c47b6ff | 2020-03-20 11:26:42 +0100 | [diff] [blame] | 1385 | kvmppc_get_gpr(vcpu, 4), |
| 1386 | kvmppc_get_gpr(vcpu, 5), |
| 1387 | kvmppc_get_gpr(vcpu, 6)); |
Bharata B Rao | ca9f494 | 2019-11-25 08:36:26 +0530 | [diff] [blame] | 1388 | break; |
| 1389 | case H_SVM_INIT_START: |
Laurent Dufour | 8c47b6ff | 2020-03-20 11:26:42 +0100 | [diff] [blame] | 1390 | ret = H_UNSUPPORTED; |
| 1391 | if (kvmppc_get_srr1(vcpu) & MSR_S) |
Nicholas Piggin | a9aa86e | 2021-05-28 19:07:47 +1000 | [diff] [blame] | 1392 | ret = kvmppc_h_svm_init_start(kvm); |
Bharata B Rao | ca9f494 | 2019-11-25 08:36:26 +0530 | [diff] [blame] | 1393 | break; |
| 1394 | case H_SVM_INIT_DONE: |
Laurent Dufour | 8c47b6ff | 2020-03-20 11:26:42 +0100 | [diff] [blame] | 1395 | ret = H_UNSUPPORTED; |
| 1396 | if (kvmppc_get_srr1(vcpu) & MSR_S) |
Nicholas Piggin | a9aa86e | 2021-05-28 19:07:47 +1000 | [diff] [blame] | 1397 | ret = kvmppc_h_svm_init_done(kvm); |
Bharata B Rao | ca9f494 | 2019-11-25 08:36:26 +0530 | [diff] [blame] | 1398 | break; |
Sukadev Bhattiprolu | 3a43970 | 2020-01-06 18:02:37 -0800 | [diff] [blame] | 1399 | case H_SVM_INIT_ABORT: |
Laurent Dufour | e3326ae | 2020-05-20 19:43:08 +0200 | [diff] [blame] | 1400 | /* |
| 1401 | * Even if that call is made by the Ultravisor, the SSR1 value |
| 1402 | * is the guest context one, with the secure bit clear as it has |
| 1403 | * not yet been secured. So we can't check it here. |
| 1404 | * Instead the kvm->arch.secure_guest flag is checked inside |
| 1405 | * kvmppc_h_svm_init_abort(). |
| 1406 | */ |
Nicholas Piggin | a9aa86e | 2021-05-28 19:07:47 +1000 | [diff] [blame] | 1407 | ret = kvmppc_h_svm_init_abort(kvm); |
Sukadev Bhattiprolu | 3a43970 | 2020-01-06 18:02:37 -0800 | [diff] [blame] | 1408 | break; |
Bharata B Rao | ca9f494 | 2019-11-25 08:36:26 +0530 | [diff] [blame] | 1409 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1410 | default: |
| 1411 | return RESUME_HOST; |
| 1412 | } |
Nicholas Piggin | 6165d5d | 2021-05-28 19:07:48 +1000 | [diff] [blame] | 1413 | WARN_ON_ONCE(ret == H_TOO_HARD); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1414 | kvmppc_set_gpr(vcpu, 3, ret); |
| 1415 | vcpu->arch.hcall_needed = 0; |
| 1416 | return RESUME_GUEST; |
| 1417 | } |
| 1418 | |
Paul Mackerras | 4bad777 | 2018-10-08 16:31:06 +1100 | [diff] [blame] | 1419 | /* |
Nicholas Piggin | 9dc2bab | 2021-05-28 19:07:33 +1000 | [diff] [blame] | 1420 | * Handle H_CEDE in the P9 path where we don't call the real-mode hcall |
| 1421 | * handlers in book3s_hv_rmhandlers.S. |
| 1422 | * |
Paul Mackerras | 4bad777 | 2018-10-08 16:31:06 +1100 | [diff] [blame] | 1423 | * This has to be done early, not in kvmppc_pseries_do_hcall(), so |
| 1424 | * that the cede logic in kvmppc_run_single_vcpu() works properly. |
| 1425 | */ |
Nicholas Piggin | 9dc2bab | 2021-05-28 19:07:33 +1000 | [diff] [blame] | 1426 | static void kvmppc_cede(struct kvm_vcpu *vcpu) |
Paul Mackerras | 4bad777 | 2018-10-08 16:31:06 +1100 | [diff] [blame] | 1427 | { |
Jordan Niethe | 6de2e83 | 2023-09-14 13:05:56 +1000 | [diff] [blame] | 1428 | __kvmppc_set_msr_hv(vcpu, __kvmppc_get_msr_hv(vcpu) | MSR_EE); |
Paul Mackerras | 4bad777 | 2018-10-08 16:31:06 +1100 | [diff] [blame] | 1429 | vcpu->arch.ceded = 1; |
| 1430 | smp_mb(); |
| 1431 | if (vcpu->arch.prodded) { |
| 1432 | vcpu->arch.prodded = 0; |
| 1433 | smp_mb(); |
| 1434 | vcpu->arch.ceded = 0; |
| 1435 | } |
| 1436 | } |
| 1437 | |
Paul Mackerras | ae2113a | 2014-06-02 11:03:00 +1000 | [diff] [blame] | 1438 | static int kvmppc_hcall_impl_hv(unsigned long cmd) |
| 1439 | { |
| 1440 | switch (cmd) { |
| 1441 | case H_CEDE: |
| 1442 | case H_PROD: |
| 1443 | case H_CONFER: |
| 1444 | case H_REGISTER_VPA: |
Michael Neuling | 9642382 | 2014-06-02 11:03:01 +1000 | [diff] [blame] | 1445 | case H_SET_MODE: |
Alexey Kardashevskiy | cad32d9 | 2022-05-06 15:37:55 +1000 | [diff] [blame] | 1446 | #ifdef CONFIG_SPAPR_TCE_IOMMU |
| 1447 | case H_GET_TCE: |
| 1448 | case H_PUT_TCE: |
| 1449 | case H_PUT_TCE_INDIRECT: |
| 1450 | case H_STUFF_TCE: |
| 1451 | #endif |
David Gibson | 99342cf8 | 2015-02-05 11:53:25 +1100 | [diff] [blame] | 1452 | case H_LOGICAL_CI_LOAD: |
| 1453 | case H_LOGICAL_CI_STORE: |
Paul Mackerras | ae2113a | 2014-06-02 11:03:00 +1000 | [diff] [blame] | 1454 | #ifdef CONFIG_KVM_XICS |
| 1455 | case H_XIRR: |
| 1456 | case H_CPPR: |
| 1457 | case H_EOI: |
| 1458 | case H_IPI: |
| 1459 | case H_IPOLL: |
| 1460 | case H_XIRR_X: |
| 1461 | #endif |
Suraj Jitindar Singh | 2d34d1c | 2019-03-22 17:05:44 +1100 | [diff] [blame] | 1462 | case H_PAGE_INIT: |
Bharata B Rao | f0c6fbb | 2021-06-21 14:20:00 +0530 | [diff] [blame] | 1463 | case H_RPT_INVALIDATE: |
Paul Mackerras | ae2113a | 2014-06-02 11:03:00 +1000 | [diff] [blame] | 1464 | return 1; |
| 1465 | } |
| 1466 | |
| 1467 | /* See if it's in the real-mode table */ |
| 1468 | return kvmppc_hcall_impl_hv_realmode(cmd); |
| 1469 | } |
| 1470 | |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 1471 | static int kvmppc_emulate_debug_inst(struct kvm_vcpu *vcpu) |
Madhavan Srinivasan | a59c1d9 | 2014-09-09 22:37:35 +0530 | [diff] [blame] | 1472 | { |
Paul Mackerras | acf1787 | 2023-03-08 17:34:48 +1100 | [diff] [blame] | 1473 | ppc_inst_t last_inst; |
Madhavan Srinivasan | a59c1d9 | 2014-09-09 22:37:35 +0530 | [diff] [blame] | 1474 | |
| 1475 | if (kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst) != |
| 1476 | EMULATE_DONE) { |
| 1477 | /* |
| 1478 | * Fetch failed, so return to guest and |
| 1479 | * try executing it again. |
| 1480 | */ |
| 1481 | return RESUME_GUEST; |
| 1482 | } |
| 1483 | |
Paul Mackerras | acf1787 | 2023-03-08 17:34:48 +1100 | [diff] [blame] | 1484 | if (ppc_inst_val(last_inst) == KVMPPC_INST_SW_BREAKPOINT) { |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 1485 | vcpu->run->exit_reason = KVM_EXIT_DEBUG; |
| 1486 | vcpu->run->debug.arch.address = kvmppc_get_pc(vcpu); |
Madhavan Srinivasan | a59c1d9 | 2014-09-09 22:37:35 +0530 | [diff] [blame] | 1487 | return RESUME_HOST; |
| 1488 | } else { |
Nicholas Piggin | 6cd5c1d | 2023-03-30 20:32:24 +1000 | [diff] [blame] | 1489 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL | |
| 1490 | (kvmppc_get_msr(vcpu) & SRR1_PREFIXED)); |
Madhavan Srinivasan | a59c1d9 | 2014-09-09 22:37:35 +0530 | [diff] [blame] | 1491 | return RESUME_GUEST; |
| 1492 | } |
| 1493 | } |
| 1494 | |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 1495 | static void do_nothing(void *x) |
| 1496 | { |
| 1497 | } |
| 1498 | |
| 1499 | static unsigned long kvmppc_read_dpdes(struct kvm_vcpu *vcpu) |
| 1500 | { |
| 1501 | int thr, cpu, pcpu, nthreads; |
| 1502 | struct kvm_vcpu *v; |
| 1503 | unsigned long dpdes; |
| 1504 | |
| 1505 | nthreads = vcpu->kvm->arch.emul_smt_mode; |
| 1506 | dpdes = 0; |
| 1507 | cpu = vcpu->vcpu_id & ~(nthreads - 1); |
| 1508 | for (thr = 0; thr < nthreads; ++thr, ++cpu) { |
| 1509 | v = kvmppc_find_vcpu(vcpu->kvm, cpu); |
| 1510 | if (!v) |
| 1511 | continue; |
| 1512 | /* |
| 1513 | * If the vcpu is currently running on a physical cpu thread, |
| 1514 | * interrupt it in order to pull it out of the guest briefly, |
| 1515 | * which will update its vcore->dpdes value. |
| 1516 | */ |
| 1517 | pcpu = READ_ONCE(v->cpu); |
| 1518 | if (pcpu >= 0) |
| 1519 | smp_call_function_single(pcpu, do_nothing, NULL, 1); |
| 1520 | if (kvmppc_doorbell_pending(v)) |
| 1521 | dpdes |= 1 << thr; |
| 1522 | } |
| 1523 | return dpdes; |
| 1524 | } |
| 1525 | |
| 1526 | /* |
| 1527 | * On POWER9, emulate doorbell-related instructions in order to |
| 1528 | * give the guest the illusion of running on a multi-threaded core. |
| 1529 | * The instructions emulated are msgsndp, msgclrp, mfspr TIR, |
| 1530 | * and mfspr DPDES. |
| 1531 | */ |
| 1532 | static int kvmppc_emulate_doorbell_instr(struct kvm_vcpu *vcpu) |
| 1533 | { |
| 1534 | u32 inst, rb, thr; |
| 1535 | unsigned long arg; |
| 1536 | struct kvm *kvm = vcpu->kvm; |
| 1537 | struct kvm_vcpu *tvcpu; |
Paul Mackerras | acf1787 | 2023-03-08 17:34:48 +1100 | [diff] [blame] | 1538 | ppc_inst_t pinst; |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 1539 | |
Paul Mackerras | acf1787 | 2023-03-08 17:34:48 +1100 | [diff] [blame] | 1540 | if (kvmppc_get_last_inst(vcpu, INST_GENERIC, &pinst) != EMULATE_DONE) |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 1541 | return RESUME_GUEST; |
Paul Mackerras | acf1787 | 2023-03-08 17:34:48 +1100 | [diff] [blame] | 1542 | inst = ppc_inst_val(pinst); |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 1543 | if (get_op(inst) != 31) |
| 1544 | return EMULATE_FAIL; |
| 1545 | rb = get_rb(inst); |
| 1546 | thr = vcpu->vcpu_id & (kvm->arch.emul_smt_mode - 1); |
| 1547 | switch (get_xop(inst)) { |
| 1548 | case OP_31_XOP_MSGSNDP: |
| 1549 | arg = kvmppc_get_gpr(vcpu, rb); |
Leonardo Bras | 87fb497 | 2020-12-08 18:57:08 -0300 | [diff] [blame] | 1550 | if (((arg >> 27) & 0x1f) != PPC_DBELL_SERVER) |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 1551 | break; |
Leonardo Bras | 87fb497 | 2020-12-08 18:57:08 -0300 | [diff] [blame] | 1552 | arg &= 0x7f; |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 1553 | if (arg >= kvm->arch.emul_smt_mode) |
| 1554 | break; |
| 1555 | tvcpu = kvmppc_find_vcpu(kvm, vcpu->vcpu_id - thr + arg); |
| 1556 | if (!tvcpu) |
| 1557 | break; |
| 1558 | if (!tvcpu->arch.doorbell_request) { |
| 1559 | tvcpu->arch.doorbell_request = 1; |
| 1560 | kvmppc_fast_vcpu_kick_hv(tvcpu); |
| 1561 | } |
| 1562 | break; |
| 1563 | case OP_31_XOP_MSGCLRP: |
| 1564 | arg = kvmppc_get_gpr(vcpu, rb); |
Leonardo Bras | 87fb497 | 2020-12-08 18:57:08 -0300 | [diff] [blame] | 1565 | if (((arg >> 27) & 0x1f) != PPC_DBELL_SERVER) |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 1566 | break; |
| 1567 | vcpu->arch.vcore->dpdes = 0; |
| 1568 | vcpu->arch.doorbell_request = 0; |
| 1569 | break; |
| 1570 | case OP_31_XOP_MFSPR: |
| 1571 | switch (get_sprn(inst)) { |
| 1572 | case SPRN_TIR: |
| 1573 | arg = thr; |
| 1574 | break; |
| 1575 | case SPRN_DPDES: |
| 1576 | arg = kvmppc_read_dpdes(vcpu); |
| 1577 | break; |
| 1578 | default: |
| 1579 | return EMULATE_FAIL; |
| 1580 | } |
| 1581 | kvmppc_set_gpr(vcpu, get_rt(inst), arg); |
| 1582 | break; |
| 1583 | default: |
| 1584 | return EMULATE_FAIL; |
| 1585 | } |
| 1586 | kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + 4); |
| 1587 | return RESUME_GUEST; |
| 1588 | } |
| 1589 | |
Nicholas Piggin | 9d3ddb8 | 2021-11-23 19:51:53 +1000 | [diff] [blame] | 1590 | /* |
| 1591 | * If the lppaca had pmcregs_in_use clear when we exited the guest, then |
| 1592 | * HFSCR_PM is cleared for next entry. If the guest then tries to access |
| 1593 | * the PMU SPRs, we get this facility unavailable interrupt. Putting HFSCR_PM |
| 1594 | * back in the guest HFSCR will cause the next entry to load the PMU SPRs and |
| 1595 | * allow the guest access to continue. |
| 1596 | */ |
| 1597 | static int kvmppc_pmu_unavailable(struct kvm_vcpu *vcpu) |
| 1598 | { |
| 1599 | if (!(vcpu->arch.hfscr_permitted & HFSCR_PM)) |
| 1600 | return EMULATE_FAIL; |
| 1601 | |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 1602 | kvmppc_set_hfscr_hv(vcpu, kvmppc_get_hfscr_hv(vcpu) | HFSCR_PM); |
Nicholas Piggin | 9d3ddb8 | 2021-11-23 19:51:53 +1000 | [diff] [blame] | 1603 | |
| 1604 | return RESUME_GUEST; |
| 1605 | } |
| 1606 | |
Nicholas Piggin | a3e18ca | 2021-11-23 19:52:14 +1000 | [diff] [blame] | 1607 | static int kvmppc_ebb_unavailable(struct kvm_vcpu *vcpu) |
| 1608 | { |
| 1609 | if (!(vcpu->arch.hfscr_permitted & HFSCR_EBB)) |
| 1610 | return EMULATE_FAIL; |
| 1611 | |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 1612 | kvmppc_set_hfscr_hv(vcpu, kvmppc_get_hfscr_hv(vcpu) | HFSCR_EBB); |
Nicholas Piggin | a3e18ca | 2021-11-23 19:52:14 +1000 | [diff] [blame] | 1613 | |
| 1614 | return RESUME_GUEST; |
| 1615 | } |
| 1616 | |
Nicholas Piggin | 022ecb9 | 2021-11-23 19:52:15 +1000 | [diff] [blame] | 1617 | static int kvmppc_tm_unavailable(struct kvm_vcpu *vcpu) |
| 1618 | { |
| 1619 | if (!(vcpu->arch.hfscr_permitted & HFSCR_TM)) |
| 1620 | return EMULATE_FAIL; |
| 1621 | |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 1622 | kvmppc_set_hfscr_hv(vcpu, kvmppc_get_hfscr_hv(vcpu) | HFSCR_TM); |
Nicholas Piggin | 022ecb9 | 2021-11-23 19:52:15 +1000 | [diff] [blame] | 1623 | |
| 1624 | return RESUME_GUEST; |
| 1625 | } |
| 1626 | |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 1627 | static int kvmppc_handle_exit_hv(struct kvm_vcpu *vcpu, |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1628 | struct task_struct *tsk) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1629 | { |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 1630 | struct kvm_run *run = vcpu->run; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1631 | int r = RESUME_HOST; |
| 1632 | |
| 1633 | vcpu->stat.sum_exits++; |
| 1634 | |
Paul Mackerras | 1c9e3d5 | 2015-11-12 16:43:48 +1100 | [diff] [blame] | 1635 | /* |
| 1636 | * This can happen if an interrupt occurs in the last stages |
| 1637 | * of guest entry or the first stages of guest exit (i.e. after |
| 1638 | * setting paca->kvm_hstate.in_guest to KVM_GUEST_MODE_GUEST_HV |
| 1639 | * and before setting it to KVM_GUEST_MODE_HOST_HV). |
| 1640 | * That can happen due to a bug, or due to a machine check |
| 1641 | * occurring at just the wrong time. |
| 1642 | */ |
Jordan Niethe | a9a3de5 | 2023-12-01 18:56:13 +0530 | [diff] [blame] | 1643 | if (!kvmhv_is_nestedv2() && (__kvmppc_get_msr_hv(vcpu) & MSR_HV)) { |
Paul Mackerras | 1c9e3d5 | 2015-11-12 16:43:48 +1100 | [diff] [blame] | 1644 | printk(KERN_EMERG "KVM trap in HV mode!\n"); |
| 1645 | printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", |
| 1646 | vcpu->arch.trap, kvmppc_get_pc(vcpu), |
| 1647 | vcpu->arch.shregs.msr); |
| 1648 | kvmppc_dump_regs(vcpu); |
| 1649 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
| 1650 | run->hw.hardware_exit_reason = vcpu->arch.trap; |
| 1651 | return RESUME_HOST; |
| 1652 | } |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1653 | run->exit_reason = KVM_EXIT_UNKNOWN; |
| 1654 | run->ready_for_interrupt_injection = 1; |
| 1655 | switch (vcpu->arch.trap) { |
| 1656 | /* We're good on these - the host merely wanted to get our attention */ |
Nicholas Piggin | 46dea77 | 2021-11-23 19:52:22 +1000 | [diff] [blame] | 1657 | case BOOK3S_INTERRUPT_NESTED_HV_DECREMENTER: |
| 1658 | WARN_ON_ONCE(1); /* Should never happen */ |
| 1659 | vcpu->arch.trap = BOOK3S_INTERRUPT_HV_DECREMENTER; |
| 1660 | fallthrough; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1661 | case BOOK3S_INTERRUPT_HV_DECREMENTER: |
| 1662 | vcpu->stat.dec_exits++; |
| 1663 | r = RESUME_GUEST; |
| 1664 | break; |
| 1665 | case BOOK3S_INTERRUPT_EXTERNAL: |
Paul Mackerras | 5d00f66 | 2014-01-08 21:25:28 +1100 | [diff] [blame] | 1666 | case BOOK3S_INTERRUPT_H_DOORBELL: |
Paul Mackerras | 84f7139 | 2016-11-22 14:30:14 +1100 | [diff] [blame] | 1667 | case BOOK3S_INTERRUPT_H_VIRT: |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1668 | vcpu->stat.ext_intr_exits++; |
| 1669 | r = RESUME_GUEST; |
| 1670 | break; |
Nicholas Piggin | 6de6638 | 2017-11-05 23:33:55 +1100 | [diff] [blame] | 1671 | /* SR/HMI/PMI are HV interrupts that host has handled. Resume guest.*/ |
Mahesh Salgaonkar | dee6f24 | 2014-11-03 15:51:57 +1100 | [diff] [blame] | 1672 | case BOOK3S_INTERRUPT_HMI: |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1673 | case BOOK3S_INTERRUPT_PERFMON: |
Nicholas Piggin | 6de6638 | 2017-11-05 23:33:55 +1100 | [diff] [blame] | 1674 | case BOOK3S_INTERRUPT_SYSTEM_RESET: |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1675 | r = RESUME_GUEST; |
| 1676 | break; |
Nicholas Piggin | 1d15ffd | 2020-11-28 17:07:24 +1000 | [diff] [blame] | 1677 | case BOOK3S_INTERRUPT_MACHINE_CHECK: { |
| 1678 | static DEFINE_RATELIMIT_STATE(rs, DEFAULT_RATELIMIT_INTERVAL, |
| 1679 | DEFAULT_RATELIMIT_BURST); |
| 1680 | /* |
| 1681 | * Print the MCE event to host console. Ratelimit so the guest |
| 1682 | * can't flood the host log. |
| 1683 | */ |
| 1684 | if (__ratelimit(&rs)) |
| 1685 | machine_check_print_event_info(&vcpu->arch.mce_evt,false, true); |
Paul Mackerras | 884dfb7 | 2019-02-21 13:38:49 +1100 | [diff] [blame] | 1686 | |
| 1687 | /* |
| 1688 | * If the guest can do FWNMI, exit to userspace so it can |
| 1689 | * deliver a FWNMI to the guest. |
| 1690 | * Otherwise we synthesize a machine check for the guest |
| 1691 | * so that it knows that the machine check occurred. |
| 1692 | */ |
| 1693 | if (!vcpu->kvm->arch.fwnmi_enabled) { |
Jordan Niethe | 6de2e83 | 2023-09-14 13:05:56 +1000 | [diff] [blame] | 1694 | ulong flags = (__kvmppc_get_msr_hv(vcpu) & 0x083c0000) | |
Nicholas Piggin | 6cd5c1d | 2023-03-30 20:32:24 +1000 | [diff] [blame] | 1695 | (kvmppc_get_msr(vcpu) & SRR1_PREFIXED); |
Paul Mackerras | 884dfb7 | 2019-02-21 13:38:49 +1100 | [diff] [blame] | 1696 | kvmppc_core_queue_machine_check(vcpu, flags); |
| 1697 | r = RESUME_GUEST; |
| 1698 | break; |
| 1699 | } |
| 1700 | |
Aravinda Prasad | e20bbd3 | 2017-05-11 16:33:37 +0530 | [diff] [blame] | 1701 | /* Exit to guest with KVM_EXIT_NMI as exit reason */ |
| 1702 | run->exit_reason = KVM_EXIT_NMI; |
| 1703 | run->hw.hardware_exit_reason = vcpu->arch.trap; |
| 1704 | /* Clear out the old NMI status from run->flags */ |
| 1705 | run->flags &= ~KVM_RUN_PPC_NMI_DISP_MASK; |
| 1706 | /* Now set the NMI status */ |
| 1707 | if (vcpu->arch.mce_evt.disposition == MCE_DISPOSITION_RECOVERED) |
| 1708 | run->flags |= KVM_RUN_PPC_NMI_DISP_FULLY_RECOV; |
| 1709 | else |
| 1710 | run->flags |= KVM_RUN_PPC_NMI_DISP_NOT_RECOV; |
| 1711 | |
| 1712 | r = RESUME_HOST; |
Paul Mackerras | b4072df | 2012-11-23 22:37:50 +0000 | [diff] [blame] | 1713 | break; |
Nicholas Piggin | 1d15ffd | 2020-11-28 17:07:24 +1000 | [diff] [blame] | 1714 | } |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1715 | case BOOK3S_INTERRUPT_PROGRAM: |
| 1716 | { |
| 1717 | ulong flags; |
| 1718 | /* |
| 1719 | * Normally program interrupts are delivered directly |
| 1720 | * to the guest by the hardware, but we can get here |
| 1721 | * as a result of a hypervisor emulation interrupt |
| 1722 | * (e40) getting turned into a 700 by BML RTAS. |
| 1723 | */ |
Jordan Niethe | 6de2e83 | 2023-09-14 13:05:56 +1000 | [diff] [blame] | 1724 | flags = (__kvmppc_get_msr_hv(vcpu) & 0x1f0000ull) | |
Nicholas Piggin | 6cd5c1d | 2023-03-30 20:32:24 +1000 | [diff] [blame] | 1725 | (kvmppc_get_msr(vcpu) & SRR1_PREFIXED); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1726 | kvmppc_core_queue_program(vcpu, flags); |
| 1727 | r = RESUME_GUEST; |
| 1728 | break; |
| 1729 | } |
| 1730 | case BOOK3S_INTERRUPT_SYSCALL: |
| 1731 | { |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1732 | int i; |
| 1733 | |
Jordan Niethe | 63ccae7 | 2023-12-01 18:56:08 +0530 | [diff] [blame] | 1734 | if (!kvmhv_is_nestedv2() && unlikely(__kvmppc_get_msr_hv(vcpu) & MSR_PR)) { |
Nicholas Piggin | 9dc2bab | 2021-05-28 19:07:33 +1000 | [diff] [blame] | 1735 | /* |
| 1736 | * Guest userspace executed sc 1. This can only be |
| 1737 | * reached by the P9 path because the old path |
| 1738 | * handles this case in realmode hcall handlers. |
Nicholas Piggin | 9dc2bab | 2021-05-28 19:07:33 +1000 | [diff] [blame] | 1739 | */ |
Nicholas Piggin | ac3c8b4 | 2021-05-28 19:07:49 +1000 | [diff] [blame] | 1740 | if (!kvmhv_vcpu_is_radix(vcpu)) { |
| 1741 | /* |
| 1742 | * A guest could be running PR KVM, so this |
| 1743 | * may be a PR KVM hcall. It must be reflected |
| 1744 | * to the guest kernel as a sc interrupt. |
| 1745 | */ |
| 1746 | kvmppc_core_queue_syscall(vcpu); |
| 1747 | } else { |
| 1748 | /* |
| 1749 | * Radix guests can not run PR KVM or nested HV |
| 1750 | * hash guests which might run PR KVM, so this |
| 1751 | * is always a privilege fault. Send a program |
| 1752 | * check to guest kernel. |
| 1753 | */ |
| 1754 | kvmppc_core_queue_program(vcpu, SRR1_PROGPRIV); |
| 1755 | } |
Nicholas Piggin | 9dc2bab | 2021-05-28 19:07:33 +1000 | [diff] [blame] | 1756 | r = RESUME_GUEST; |
| 1757 | break; |
| 1758 | } |
Liu Ping Fan | 27025a6 | 2013-11-19 14:12:48 +0800 | [diff] [blame] | 1759 | |
Nicholas Piggin | 9dc2bab | 2021-05-28 19:07:33 +1000 | [diff] [blame] | 1760 | /* |
| 1761 | * hcall - gather args and set exit_reason. This will next be |
| 1762 | * handled by kvmppc_pseries_do_hcall which may be able to deal |
| 1763 | * with it and resume guest, or may punt to userspace. |
| 1764 | */ |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1765 | run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3); |
| 1766 | for (i = 0; i < 9; ++i) |
| 1767 | run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i); |
| 1768 | run->exit_reason = KVM_EXIT_PAPR_HCALL; |
| 1769 | vcpu->arch.hcall_needed = 1; |
| 1770 | r = RESUME_HOST; |
| 1771 | break; |
| 1772 | } |
| 1773 | /* |
Paul Mackerras | 342d3db | 2011-12-12 12:38:05 +0000 | [diff] [blame] | 1774 | * We get these next two if the guest accesses a page which it thinks |
| 1775 | * it has mapped but which is not actually present, either because |
| 1776 | * it is for an emulated I/O device or because the corresonding |
Nicholas Piggin | 6165d5d | 2021-05-28 19:07:48 +1000 | [diff] [blame] | 1777 | * host page has been paged out. |
| 1778 | * |
| 1779 | * Any other HDSI/HISI interrupts have been handled already for P7/8 |
| 1780 | * guests. For POWER9 hash guests not using rmhandlers, basic hash |
| 1781 | * fault handling is done here. |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1782 | */ |
Nicholas Piggin | 6165d5d | 2021-05-28 19:07:48 +1000 | [diff] [blame] | 1783 | case BOOK3S_INTERRUPT_H_DATA_STORAGE: { |
| 1784 | unsigned long vsid; |
| 1785 | long err; |
| 1786 | |
Nicholas Piggin | d55b1ec | 2021-11-23 19:52:12 +1000 | [diff] [blame] | 1787 | if (cpu_has_feature(CPU_FTR_P9_RADIX_PREFETCH_BUG) && |
| 1788 | unlikely(vcpu->arch.fault_dsisr == HDSISR_CANARY)) { |
Nicholas Piggin | 89d35b2 | 2021-05-28 19:07:34 +1000 | [diff] [blame] | 1789 | r = RESUME_GUEST; /* Just retry if it's the canary */ |
Nicholas Piggin | 6165d5d | 2021-05-28 19:07:48 +1000 | [diff] [blame] | 1790 | break; |
| 1791 | } |
| 1792 | |
| 1793 | if (kvm_is_radix(vcpu->kvm) || !cpu_has_feature(CPU_FTR_ARCH_300)) { |
| 1794 | /* |
| 1795 | * Radix doesn't require anything, and pre-ISAv3.0 hash |
| 1796 | * already attempted to handle this in rmhandlers. The |
| 1797 | * hash fault handling below is v3 only (it uses ASDR |
| 1798 | * via fault_gpa). |
| 1799 | */ |
| 1800 | r = RESUME_PAGE_FAULT; |
| 1801 | break; |
| 1802 | } |
| 1803 | |
| 1804 | if (!(vcpu->arch.fault_dsisr & (DSISR_NOHPTE | DSISR_PROTFAULT))) { |
| 1805 | kvmppc_core_queue_data_storage(vcpu, |
Nicholas Piggin | 6cd5c1d | 2023-03-30 20:32:24 +1000 | [diff] [blame] | 1806 | kvmppc_get_msr(vcpu) & SRR1_PREFIXED, |
Nicholas Piggin | 6165d5d | 2021-05-28 19:07:48 +1000 | [diff] [blame] | 1807 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); |
| 1808 | r = RESUME_GUEST; |
| 1809 | break; |
| 1810 | } |
| 1811 | |
Jordan Niethe | 6de2e83 | 2023-09-14 13:05:56 +1000 | [diff] [blame] | 1812 | if (!(__kvmppc_get_msr_hv(vcpu) & MSR_DR)) |
Nicholas Piggin | 6165d5d | 2021-05-28 19:07:48 +1000 | [diff] [blame] | 1813 | vsid = vcpu->kvm->arch.vrma_slb_v; |
| 1814 | else |
| 1815 | vsid = vcpu->arch.fault_gpa; |
| 1816 | |
| 1817 | err = kvmppc_hpte_hv_fault(vcpu, vcpu->arch.fault_dar, |
| 1818 | vsid, vcpu->arch.fault_dsisr, true); |
| 1819 | if (err == 0) { |
| 1820 | r = RESUME_GUEST; |
| 1821 | } else if (err == -1 || err == -2) { |
| 1822 | r = RESUME_PAGE_FAULT; |
| 1823 | } else { |
| 1824 | kvmppc_core_queue_data_storage(vcpu, |
Nicholas Piggin | 6cd5c1d | 2023-03-30 20:32:24 +1000 | [diff] [blame] | 1825 | kvmppc_get_msr(vcpu) & SRR1_PREFIXED, |
Nicholas Piggin | 6165d5d | 2021-05-28 19:07:48 +1000 | [diff] [blame] | 1826 | vcpu->arch.fault_dar, err); |
| 1827 | r = RESUME_GUEST; |
| 1828 | } |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1829 | break; |
Nicholas Piggin | 6165d5d | 2021-05-28 19:07:48 +1000 | [diff] [blame] | 1830 | } |
| 1831 | case BOOK3S_INTERRUPT_H_INST_STORAGE: { |
| 1832 | unsigned long vsid; |
| 1833 | long err; |
| 1834 | |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 1835 | vcpu->arch.fault_dar = kvmppc_get_pc(vcpu); |
Jordan Niethe | 6de2e83 | 2023-09-14 13:05:56 +1000 | [diff] [blame] | 1836 | vcpu->arch.fault_dsisr = __kvmppc_get_msr_hv(vcpu) & |
Paul Mackerras | 32eb150 | 2018-10-08 16:30:56 +1100 | [diff] [blame] | 1837 | DSISR_SRR1_MATCH_64S; |
Nicholas Piggin | 6165d5d | 2021-05-28 19:07:48 +1000 | [diff] [blame] | 1838 | if (kvm_is_radix(vcpu->kvm) || !cpu_has_feature(CPU_FTR_ARCH_300)) { |
| 1839 | /* |
| 1840 | * Radix doesn't require anything, and pre-ISAv3.0 hash |
| 1841 | * already attempted to handle this in rmhandlers. The |
| 1842 | * hash fault handling below is v3 only (it uses ASDR |
| 1843 | * via fault_gpa). |
| 1844 | */ |
Jordan Niethe | 6de2e83 | 2023-09-14 13:05:56 +1000 | [diff] [blame] | 1845 | if (__kvmppc_get_msr_hv(vcpu) & HSRR1_HISI_WRITE) |
Nicholas Piggin | 6165d5d | 2021-05-28 19:07:48 +1000 | [diff] [blame] | 1846 | vcpu->arch.fault_dsisr |= DSISR_ISSTORE; |
| 1847 | r = RESUME_PAGE_FAULT; |
| 1848 | break; |
| 1849 | } |
| 1850 | |
| 1851 | if (!(vcpu->arch.fault_dsisr & SRR1_ISI_NOPT)) { |
| 1852 | kvmppc_core_queue_inst_storage(vcpu, |
Nicholas Piggin | 6cd5c1d | 2023-03-30 20:32:24 +1000 | [diff] [blame] | 1853 | vcpu->arch.fault_dsisr | |
| 1854 | (kvmppc_get_msr(vcpu) & SRR1_PREFIXED)); |
Nicholas Piggin | 6165d5d | 2021-05-28 19:07:48 +1000 | [diff] [blame] | 1855 | r = RESUME_GUEST; |
| 1856 | break; |
| 1857 | } |
| 1858 | |
Jordan Niethe | 6de2e83 | 2023-09-14 13:05:56 +1000 | [diff] [blame] | 1859 | if (!(__kvmppc_get_msr_hv(vcpu) & MSR_IR)) |
Nicholas Piggin | 6165d5d | 2021-05-28 19:07:48 +1000 | [diff] [blame] | 1860 | vsid = vcpu->kvm->arch.vrma_slb_v; |
| 1861 | else |
| 1862 | vsid = vcpu->arch.fault_gpa; |
| 1863 | |
| 1864 | err = kvmppc_hpte_hv_fault(vcpu, vcpu->arch.fault_dar, |
| 1865 | vsid, vcpu->arch.fault_dsisr, false); |
| 1866 | if (err == 0) { |
| 1867 | r = RESUME_GUEST; |
| 1868 | } else if (err == -1) { |
| 1869 | r = RESUME_PAGE_FAULT; |
| 1870 | } else { |
Nicholas Piggin | 6cd5c1d | 2023-03-30 20:32:24 +1000 | [diff] [blame] | 1871 | kvmppc_core_queue_inst_storage(vcpu, |
| 1872 | err | (kvmppc_get_msr(vcpu) & SRR1_PREFIXED)); |
Nicholas Piggin | 6165d5d | 2021-05-28 19:07:48 +1000 | [diff] [blame] | 1873 | r = RESUME_GUEST; |
| 1874 | } |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1875 | break; |
Nicholas Piggin | 6165d5d | 2021-05-28 19:07:48 +1000 | [diff] [blame] | 1876 | } |
| 1877 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1878 | /* |
| 1879 | * This occurs if the guest executes an illegal instruction. |
Madhavan Srinivasan | a59c1d9 | 2014-09-09 22:37:35 +0530 | [diff] [blame] | 1880 | * If the guest debug is disabled, generate a program interrupt |
| 1881 | * to the guest. If guest debug is enabled, we need to check |
| 1882 | * whether the instruction is a software breakpoint instruction. |
| 1883 | * Accordingly return to Guest or Host. |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1884 | */ |
| 1885 | case BOOK3S_INTERRUPT_H_EMUL_ASSIST: |
Paul Mackerras | 4a157d6 | 2014-12-03 13:30:39 +1100 | [diff] [blame] | 1886 | if (vcpu->arch.emul_inst != KVM_INST_FETCH_FAILED) |
| 1887 | vcpu->arch.last_inst = kvmppc_need_byteswap(vcpu) ? |
| 1888 | swab32(vcpu->arch.emul_inst) : |
| 1889 | vcpu->arch.emul_inst; |
Madhavan Srinivasan | a59c1d9 | 2014-09-09 22:37:35 +0530 | [diff] [blame] | 1890 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) { |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 1891 | r = kvmppc_emulate_debug_inst(vcpu); |
Madhavan Srinivasan | a59c1d9 | 2014-09-09 22:37:35 +0530 | [diff] [blame] | 1892 | } else { |
Nicholas Piggin | 6cd5c1d | 2023-03-30 20:32:24 +1000 | [diff] [blame] | 1893 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL | |
| 1894 | (kvmppc_get_msr(vcpu) & SRR1_PREFIXED)); |
Madhavan Srinivasan | a59c1d9 | 2014-09-09 22:37:35 +0530 | [diff] [blame] | 1895 | r = RESUME_GUEST; |
| 1896 | } |
Michael Ellerman | bd3048b | 2014-01-08 21:25:23 +1100 | [diff] [blame] | 1897 | break; |
Nicholas Piggin | d82b392 | 2021-08-12 02:00:38 +1000 | [diff] [blame] | 1898 | |
| 1899 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
| 1900 | case BOOK3S_INTERRUPT_HV_SOFTPATCH: |
| 1901 | /* |
| 1902 | * This occurs for various TM-related instructions that |
| 1903 | * we need to emulate on POWER9 DD2.2. We have already |
| 1904 | * handled the cases where the guest was in real-suspend |
| 1905 | * mode and was transitioning to transactional state. |
| 1906 | */ |
| 1907 | r = kvmhv_p9_tm_emulation(vcpu); |
| 1908 | if (r != -1) |
| 1909 | break; |
| 1910 | fallthrough; /* go to facility unavailable handler */ |
| 1911 | #endif |
| 1912 | |
Michael Ellerman | bd3048b | 2014-01-08 21:25:23 +1100 | [diff] [blame] | 1913 | /* |
| 1914 | * This occurs if the guest (kernel or userspace), does something that |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 1915 | * is prohibited by HFSCR. |
| 1916 | * On POWER9, this could be a doorbell instruction that we need |
| 1917 | * to emulate. |
| 1918 | * Otherwise, we just generate a program interrupt to the guest. |
Michael Ellerman | bd3048b | 2014-01-08 21:25:23 +1100 | [diff] [blame] | 1919 | */ |
Nicholas Piggin | 9d3ddb8 | 2021-11-23 19:51:53 +1000 | [diff] [blame] | 1920 | case BOOK3S_INTERRUPT_H_FAC_UNAVAIL: { |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 1921 | u64 cause = kvmppc_get_hfscr_hv(vcpu) >> 56; |
Nicholas Piggin | 9d3ddb8 | 2021-11-23 19:51:53 +1000 | [diff] [blame] | 1922 | |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 1923 | r = EMULATE_FAIL; |
Nicholas Piggin | 9d3ddb8 | 2021-11-23 19:51:53 +1000 | [diff] [blame] | 1924 | if (cpu_has_feature(CPU_FTR_ARCH_300)) { |
Gautam Menghani | 9739ff4 | 2024-07-16 17:22:04 +0530 | [diff] [blame] | 1925 | switch (cause) { |
| 1926 | case FSCR_MSGP_LG: |
Nicholas Piggin | 9d3ddb8 | 2021-11-23 19:51:53 +1000 | [diff] [blame] | 1927 | r = kvmppc_emulate_doorbell_instr(vcpu); |
Gautam Menghani | 9739ff4 | 2024-07-16 17:22:04 +0530 | [diff] [blame] | 1928 | break; |
| 1929 | case FSCR_PM_LG: |
Nicholas Piggin | 9d3ddb8 | 2021-11-23 19:51:53 +1000 | [diff] [blame] | 1930 | r = kvmppc_pmu_unavailable(vcpu); |
Gautam Menghani | 9739ff4 | 2024-07-16 17:22:04 +0530 | [diff] [blame] | 1931 | break; |
| 1932 | case FSCR_EBB_LG: |
Nicholas Piggin | a3e18ca | 2021-11-23 19:52:14 +1000 | [diff] [blame] | 1933 | r = kvmppc_ebb_unavailable(vcpu); |
Gautam Menghani | 9739ff4 | 2024-07-16 17:22:04 +0530 | [diff] [blame] | 1934 | break; |
| 1935 | case FSCR_TM_LG: |
Nicholas Piggin | 022ecb9 | 2021-11-23 19:52:15 +1000 | [diff] [blame] | 1936 | r = kvmppc_tm_unavailable(vcpu); |
Gautam Menghani | 9739ff4 | 2024-07-16 17:22:04 +0530 | [diff] [blame] | 1937 | break; |
| 1938 | default: |
| 1939 | break; |
| 1940 | } |
Nicholas Piggin | 9d3ddb8 | 2021-11-23 19:51:53 +1000 | [diff] [blame] | 1941 | } |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 1942 | if (r == EMULATE_FAIL) { |
Nicholas Piggin | 6cd5c1d | 2023-03-30 20:32:24 +1000 | [diff] [blame] | 1943 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL | |
| 1944 | (kvmppc_get_msr(vcpu) & SRR1_PREFIXED)); |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 1945 | r = RESUME_GUEST; |
| 1946 | } |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1947 | break; |
Nicholas Piggin | 9d3ddb8 | 2021-11-23 19:51:53 +1000 | [diff] [blame] | 1948 | } |
Paul Mackerras | 4bb3c7a | 2018-03-21 21:32:01 +1100 | [diff] [blame] | 1949 | |
Suresh Warrier | f7af520 | 2016-08-19 15:35:52 +1000 | [diff] [blame] | 1950 | case BOOK3S_INTERRUPT_HV_RM_HARD: |
| 1951 | r = RESUME_PASSTHROUGH; |
| 1952 | break; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1953 | default: |
| 1954 | kvmppc_dump_regs(vcpu); |
| 1955 | printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", |
| 1956 | vcpu->arch.trap, kvmppc_get_pc(vcpu), |
Jordan Niethe | 6de2e83 | 2023-09-14 13:05:56 +1000 | [diff] [blame] | 1957 | __kvmppc_get_msr_hv(vcpu)); |
Paul Mackerras | f3271d4 | 2013-09-20 14:52:41 +1000 | [diff] [blame] | 1958 | run->hw.hardware_exit_reason = vcpu->arch.trap; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1959 | r = RESUME_HOST; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1960 | break; |
| 1961 | } |
| 1962 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1963 | return r; |
| 1964 | } |
| 1965 | |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 1966 | static int kvmppc_handle_nested_exit(struct kvm_vcpu *vcpu) |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 1967 | { |
| 1968 | int r; |
| 1969 | int srcu_idx; |
| 1970 | |
| 1971 | vcpu->stat.sum_exits++; |
| 1972 | |
| 1973 | /* |
| 1974 | * This can happen if an interrupt occurs in the last stages |
| 1975 | * of guest entry or the first stages of guest exit (i.e. after |
| 1976 | * setting paca->kvm_hstate.in_guest to KVM_GUEST_MODE_GUEST_HV |
| 1977 | * and before setting it to KVM_GUEST_MODE_HOST_HV). |
| 1978 | * That can happen due to a bug, or due to a machine check |
| 1979 | * occurring at just the wrong time. |
| 1980 | */ |
Jordan Niethe | 6de2e83 | 2023-09-14 13:05:56 +1000 | [diff] [blame] | 1981 | if (__kvmppc_get_msr_hv(vcpu) & MSR_HV) { |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 1982 | pr_emerg("KVM trap in HV mode while nested!\n"); |
| 1983 | pr_emerg("trap=0x%x | pc=0x%lx | msr=0x%llx\n", |
| 1984 | vcpu->arch.trap, kvmppc_get_pc(vcpu), |
Jordan Niethe | 6de2e83 | 2023-09-14 13:05:56 +1000 | [diff] [blame] | 1985 | __kvmppc_get_msr_hv(vcpu)); |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 1986 | kvmppc_dump_regs(vcpu); |
| 1987 | return RESUME_HOST; |
| 1988 | } |
| 1989 | switch (vcpu->arch.trap) { |
| 1990 | /* We're good on these - the host merely wanted to get our attention */ |
| 1991 | case BOOK3S_INTERRUPT_HV_DECREMENTER: |
| 1992 | vcpu->stat.dec_exits++; |
| 1993 | r = RESUME_GUEST; |
| 1994 | break; |
| 1995 | case BOOK3S_INTERRUPT_EXTERNAL: |
| 1996 | vcpu->stat.ext_intr_exits++; |
| 1997 | r = RESUME_HOST; |
| 1998 | break; |
| 1999 | case BOOK3S_INTERRUPT_H_DOORBELL: |
| 2000 | case BOOK3S_INTERRUPT_H_VIRT: |
| 2001 | vcpu->stat.ext_intr_exits++; |
| 2002 | r = RESUME_GUEST; |
| 2003 | break; |
Nicholas Piggin | 46dea77 | 2021-11-23 19:52:22 +1000 | [diff] [blame] | 2004 | /* These need to go to the nested HV */ |
| 2005 | case BOOK3S_INTERRUPT_NESTED_HV_DECREMENTER: |
| 2006 | vcpu->arch.trap = BOOK3S_INTERRUPT_HV_DECREMENTER; |
| 2007 | vcpu->stat.dec_exits++; |
| 2008 | r = RESUME_HOST; |
| 2009 | break; |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 2010 | /* SR/HMI/PMI are HV interrupts that host has handled. Resume guest.*/ |
| 2011 | case BOOK3S_INTERRUPT_HMI: |
| 2012 | case BOOK3S_INTERRUPT_PERFMON: |
| 2013 | case BOOK3S_INTERRUPT_SYSTEM_RESET: |
| 2014 | r = RESUME_GUEST; |
| 2015 | break; |
| 2016 | case BOOK3S_INTERRUPT_MACHINE_CHECK: |
Nicholas Piggin | 1d15ffd | 2020-11-28 17:07:24 +1000 | [diff] [blame] | 2017 | { |
| 2018 | static DEFINE_RATELIMIT_STATE(rs, DEFAULT_RATELIMIT_INTERVAL, |
| 2019 | DEFAULT_RATELIMIT_BURST); |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 2020 | /* Pass the machine check to the L1 guest */ |
| 2021 | r = RESUME_HOST; |
| 2022 | /* Print the MCE event to host console. */ |
Nicholas Piggin | 1d15ffd | 2020-11-28 17:07:24 +1000 | [diff] [blame] | 2023 | if (__ratelimit(&rs)) |
| 2024 | machine_check_print_event_info(&vcpu->arch.mce_evt, false, true); |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 2025 | break; |
Nicholas Piggin | 1d15ffd | 2020-11-28 17:07:24 +1000 | [diff] [blame] | 2026 | } |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 2027 | /* |
| 2028 | * We get these next two if the guest accesses a page which it thinks |
| 2029 | * it has mapped but which is not actually present, either because |
| 2030 | * it is for an emulated I/O device or because the corresonding |
| 2031 | * host page has been paged out. |
| 2032 | */ |
| 2033 | case BOOK3S_INTERRUPT_H_DATA_STORAGE: |
| 2034 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 2035 | r = kvmhv_nested_page_fault(vcpu); |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 2036 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); |
| 2037 | break; |
| 2038 | case BOOK3S_INTERRUPT_H_INST_STORAGE: |
| 2039 | vcpu->arch.fault_dar = kvmppc_get_pc(vcpu); |
| 2040 | vcpu->arch.fault_dsisr = kvmppc_get_msr(vcpu) & |
| 2041 | DSISR_SRR1_MATCH_64S; |
Jordan Niethe | 6de2e83 | 2023-09-14 13:05:56 +1000 | [diff] [blame] | 2042 | if (__kvmppc_get_msr_hv(vcpu) & HSRR1_HISI_WRITE) |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 2043 | vcpu->arch.fault_dsisr |= DSISR_ISSTORE; |
| 2044 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 2045 | r = kvmhv_nested_page_fault(vcpu); |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 2046 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); |
| 2047 | break; |
| 2048 | |
| 2049 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
| 2050 | case BOOK3S_INTERRUPT_HV_SOFTPATCH: |
| 2051 | /* |
| 2052 | * This occurs for various TM-related instructions that |
| 2053 | * we need to emulate on POWER9 DD2.2. We have already |
| 2054 | * handled the cases where the guest was in real-suspend |
| 2055 | * mode and was transitioning to transactional state. |
| 2056 | */ |
| 2057 | r = kvmhv_p9_tm_emulation(vcpu); |
Nicholas Piggin | d82b392 | 2021-08-12 02:00:38 +1000 | [diff] [blame] | 2058 | if (r != -1) |
| 2059 | break; |
| 2060 | fallthrough; /* go to facility unavailable handler */ |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 2061 | #endif |
| 2062 | |
Fabiano Rosas | 7c3ded5 | 2021-08-12 02:00:41 +1000 | [diff] [blame] | 2063 | case BOOK3S_INTERRUPT_H_FAC_UNAVAIL: { |
| 2064 | u64 cause = vcpu->arch.hfscr >> 56; |
| 2065 | |
| 2066 | /* |
| 2067 | * Only pass HFU interrupts to the L1 if the facility is |
| 2068 | * permitted but disabled by the L1's HFSCR, otherwise |
| 2069 | * the interrupt does not make sense to the L1 so turn |
| 2070 | * it into a HEAI. |
| 2071 | */ |
| 2072 | if (!(vcpu->arch.hfscr_permitted & (1UL << cause)) || |
Nicholas Piggin | 22f7ff0 | 2022-01-22 20:55:30 +1000 | [diff] [blame] | 2073 | (vcpu->arch.nested_hfscr & (1UL << cause))) { |
Paul Mackerras | acf1787 | 2023-03-08 17:34:48 +1100 | [diff] [blame] | 2074 | ppc_inst_t pinst; |
Fabiano Rosas | 7c3ded5 | 2021-08-12 02:00:41 +1000 | [diff] [blame] | 2075 | vcpu->arch.trap = BOOK3S_INTERRUPT_H_EMUL_ASSIST; |
| 2076 | |
| 2077 | /* |
| 2078 | * If the fetch failed, return to guest and |
| 2079 | * try executing it again. |
| 2080 | */ |
Paul Mackerras | acf1787 | 2023-03-08 17:34:48 +1100 | [diff] [blame] | 2081 | r = kvmppc_get_last_inst(vcpu, INST_GENERIC, &pinst); |
| 2082 | vcpu->arch.emul_inst = ppc_inst_val(pinst); |
Fabiano Rosas | 7c3ded5 | 2021-08-12 02:00:41 +1000 | [diff] [blame] | 2083 | if (r != EMULATE_DONE) |
| 2084 | r = RESUME_GUEST; |
| 2085 | else |
| 2086 | r = RESUME_HOST; |
| 2087 | } else { |
| 2088 | r = RESUME_HOST; |
| 2089 | } |
| 2090 | |
Nicholas Piggin | d82b392 | 2021-08-12 02:00:38 +1000 | [diff] [blame] | 2091 | break; |
Fabiano Rosas | 7c3ded5 | 2021-08-12 02:00:41 +1000 | [diff] [blame] | 2092 | } |
Nicholas Piggin | d82b392 | 2021-08-12 02:00:38 +1000 | [diff] [blame] | 2093 | |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 2094 | case BOOK3S_INTERRUPT_HV_RM_HARD: |
| 2095 | vcpu->arch.trap = 0; |
| 2096 | r = RESUME_GUEST; |
Paul Mackerras | 03f9533 | 2019-02-04 22:07:20 +1100 | [diff] [blame] | 2097 | if (!xics_on_xive()) |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 2098 | kvmppc_xics_rm_complete(vcpu, 0); |
| 2099 | break; |
Bharata B Rao | 53324b5 | 2021-06-21 14:20:01 +0530 | [diff] [blame] | 2100 | case BOOK3S_INTERRUPT_SYSCALL: |
| 2101 | { |
| 2102 | unsigned long req = kvmppc_get_gpr(vcpu, 3); |
| 2103 | |
| 2104 | /* |
| 2105 | * The H_RPT_INVALIDATE hcalls issued by nested |
| 2106 | * guests for process-scoped invalidations when |
| 2107 | * GTSE=0, are handled here in L0. |
| 2108 | */ |
| 2109 | if (req == H_RPT_INVALIDATE) { |
| 2110 | r = kvmppc_nested_h_rpt_invalidate(vcpu); |
| 2111 | break; |
| 2112 | } |
| 2113 | |
| 2114 | r = RESUME_HOST; |
| 2115 | break; |
| 2116 | } |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 2117 | default: |
| 2118 | r = RESUME_HOST; |
| 2119 | break; |
| 2120 | } |
| 2121 | |
| 2122 | return r; |
| 2123 | } |
| 2124 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 2125 | static int kvm_arch_vcpu_ioctl_get_sregs_hv(struct kvm_vcpu *vcpu, |
| 2126 | struct kvm_sregs *sregs) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2127 | { |
| 2128 | int i; |
| 2129 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2130 | memset(sregs, 0, sizeof(struct kvm_sregs)); |
Aneesh Kumar K.V | 8791644 | 2013-08-22 17:08:39 +0530 | [diff] [blame] | 2131 | sregs->pvr = vcpu->arch.pvr; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2132 | for (i = 0; i < vcpu->arch.slb_max; i++) { |
| 2133 | sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige; |
| 2134 | sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv; |
| 2135 | } |
| 2136 | |
| 2137 | return 0; |
| 2138 | } |
| 2139 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 2140 | static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu *vcpu, |
| 2141 | struct kvm_sregs *sregs) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2142 | { |
| 2143 | int i, j; |
| 2144 | |
Paul Mackerras | 9333e6c | 2014-09-02 16:14:43 +1000 | [diff] [blame] | 2145 | /* Only accept the same PVR as the host's, since we can't spoof it */ |
| 2146 | if (sregs->pvr != vcpu->arch.pvr) |
| 2147 | return -EINVAL; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2148 | |
| 2149 | j = 0; |
| 2150 | for (i = 0; i < vcpu->arch.slb_nr; i++) { |
| 2151 | if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) { |
| 2152 | vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe; |
| 2153 | vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv; |
| 2154 | ++j; |
| 2155 | } |
| 2156 | } |
| 2157 | vcpu->arch.slb_max = j; |
| 2158 | |
| 2159 | return 0; |
| 2160 | } |
| 2161 | |
Nicholas Piggin | 67145ef | 2021-04-12 11:48:36 +1000 | [diff] [blame] | 2162 | /* |
| 2163 | * Enforce limits on guest LPCR values based on hardware availability, |
| 2164 | * guest configuration, and possibly hypervisor support and security |
| 2165 | * concerns. |
| 2166 | */ |
| 2167 | unsigned long kvmppc_filter_lpcr_hv(struct kvm *kvm, unsigned long lpcr) |
| 2168 | { |
Nicholas Piggin | 72c1528 | 2021-04-12 11:48:38 +1000 | [diff] [blame] | 2169 | /* LPCR_TC only applies to HPT guests */ |
| 2170 | if (kvm_is_radix(kvm)) |
| 2171 | lpcr &= ~LPCR_TC; |
| 2172 | |
Nicholas Piggin | 67145ef | 2021-04-12 11:48:36 +1000 | [diff] [blame] | 2173 | /* On POWER8 and above, userspace can modify AIL */ |
| 2174 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) |
| 2175 | lpcr &= ~LPCR_AIL; |
Nicholas Piggin | bcc92a0 | 2021-04-12 11:48:37 +1000 | [diff] [blame] | 2176 | if ((lpcr & LPCR_AIL) != LPCR_AIL_3) |
| 2177 | lpcr &= ~LPCR_AIL; /* LPCR[AIL]=1/2 is disallowed */ |
Nicholas Piggin | 2e1ae9cd | 2021-05-28 19:07:41 +1000 | [diff] [blame] | 2178 | /* |
| 2179 | * On some POWER9s we force AIL off for radix guests to prevent |
| 2180 | * executing in MSR[HV]=1 mode with the MMU enabled and PIDR set to |
| 2181 | * guest, which can result in Q0 translations with LPID=0 PID=PIDR to |
| 2182 | * be cached, which the host TLB management does not expect. |
| 2183 | */ |
| 2184 | if (kvm_is_radix(kvm) && cpu_has_feature(CPU_FTR_P9_RADIX_PREFETCH_BUG)) |
| 2185 | lpcr &= ~LPCR_AIL; |
Nicholas Piggin | 67145ef | 2021-04-12 11:48:36 +1000 | [diff] [blame] | 2186 | |
| 2187 | /* |
| 2188 | * On POWER9, allow userspace to enable large decrementer for the |
| 2189 | * guest, whether or not the host has it enabled. |
| 2190 | */ |
| 2191 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
| 2192 | lpcr &= ~LPCR_LD; |
| 2193 | |
| 2194 | return lpcr; |
| 2195 | } |
| 2196 | |
| 2197 | static void verify_lpcr(struct kvm *kvm, unsigned long lpcr) |
| 2198 | { |
| 2199 | if (lpcr != kvmppc_filter_lpcr_hv(kvm, lpcr)) { |
| 2200 | WARN_ONCE(1, "lpcr 0x%lx differs from filtered 0x%lx\n", |
| 2201 | lpcr, kvmppc_filter_lpcr_hv(kvm, lpcr)); |
| 2202 | } |
| 2203 | } |
| 2204 | |
Alexey Kardashevskiy | a084024 | 2014-07-19 17:59:34 +1000 | [diff] [blame] | 2205 | static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr, |
| 2206 | bool preserve_top32) |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 2207 | { |
Paul Mackerras | 8f902b0 | 2015-03-20 20:39:38 +1100 | [diff] [blame] | 2208 | struct kvm *kvm = vcpu->kvm; |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 2209 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
| 2210 | u64 mask; |
| 2211 | |
| 2212 | spin_lock(&vc->lock); |
Nicholas Piggin | 67145ef | 2021-04-12 11:48:36 +1000 | [diff] [blame] | 2213 | |
| 2214 | /* |
| 2215 | * Userspace can only modify |
| 2216 | * DPFD (default prefetch depth), ILE (interrupt little-endian), |
| 2217 | * TC (translation control), AIL (alternate interrupt location), |
| 2218 | * LD (large decrementer). |
| 2219 | * These are subject to restrictions from kvmppc_filter_lcpr_hv(). |
| 2220 | */ |
| 2221 | mask = LPCR_DPFD | LPCR_ILE | LPCR_TC | LPCR_AIL | LPCR_LD; |
| 2222 | |
| 2223 | /* Broken 32-bit version of LPCR must not clear top bits */ |
| 2224 | if (preserve_top32) |
| 2225 | mask &= 0xFFFFFFFF; |
| 2226 | |
| 2227 | new_lpcr = kvmppc_filter_lpcr_hv(kvm, |
| 2228 | (vc->lpcr & ~mask) | (new_lpcr & mask)); |
| 2229 | |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 2230 | /* |
Anton Blanchard | d682916 | 2014-01-08 21:25:30 +1100 | [diff] [blame] | 2231 | * If ILE (interrupt little-endian) has changed, update the |
| 2232 | * MSR_LE bit in the intr_msr for each vcpu in this vcore. |
| 2233 | */ |
| 2234 | if ((new_lpcr & LPCR_ILE) != (vc->lpcr & LPCR_ILE)) { |
Anton Blanchard | d682916 | 2014-01-08 21:25:30 +1100 | [diff] [blame] | 2235 | struct kvm_vcpu *vcpu; |
Marc Zyngier | 46808a4 | 2021-11-16 16:04:02 +0000 | [diff] [blame] | 2236 | unsigned long i; |
Anton Blanchard | d682916 | 2014-01-08 21:25:30 +1100 | [diff] [blame] | 2237 | |
Anton Blanchard | d682916 | 2014-01-08 21:25:30 +1100 | [diff] [blame] | 2238 | kvm_for_each_vcpu(i, vcpu, kvm) { |
| 2239 | if (vcpu->arch.vcore != vc) |
| 2240 | continue; |
| 2241 | if (new_lpcr & LPCR_ILE) |
| 2242 | vcpu->arch.intr_msr |= MSR_LE; |
| 2243 | else |
| 2244 | vcpu->arch.intr_msr &= ~MSR_LE; |
| 2245 | } |
Anton Blanchard | d682916 | 2014-01-08 21:25:30 +1100 | [diff] [blame] | 2246 | } |
| 2247 | |
Nicholas Piggin | 67145ef | 2021-04-12 11:48:36 +1000 | [diff] [blame] | 2248 | vc->lpcr = new_lpcr; |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 2249 | kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_LPCR); |
Alexey Kardashevskiy | a084024 | 2014-07-19 17:59:34 +1000 | [diff] [blame] | 2250 | |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 2251 | spin_unlock(&vc->lock); |
| 2252 | } |
| 2253 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 2254 | static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, |
| 2255 | union kvmppc_one_reg *val) |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 2256 | { |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2257 | int r = 0; |
| 2258 | long int i; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 2259 | |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2260 | switch (id) { |
Madhavan Srinivasan | a59c1d9 | 2014-09-09 22:37:35 +0530 | [diff] [blame] | 2261 | case KVM_REG_PPC_DEBUG_INST: |
| 2262 | *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT); |
| 2263 | break; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 2264 | case KVM_REG_PPC_HIOR: |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2265 | *val = get_reg_val(id, 0); |
| 2266 | break; |
| 2267 | case KVM_REG_PPC_DABR: |
| 2268 | *val = get_reg_val(id, vcpu->arch.dabr); |
| 2269 | break; |
Paul Mackerras | 8563bf5 | 2014-01-08 21:25:29 +1100 | [diff] [blame] | 2270 | case KVM_REG_PPC_DABRX: |
| 2271 | *val = get_reg_val(id, vcpu->arch.dabrx); |
| 2272 | break; |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2273 | case KVM_REG_PPC_DSCR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2274 | *val = get_reg_val(id, kvmppc_get_dscr_hv(vcpu)); |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2275 | break; |
| 2276 | case KVM_REG_PPC_PURR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2277 | *val = get_reg_val(id, kvmppc_get_purr_hv(vcpu)); |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2278 | break; |
| 2279 | case KVM_REG_PPC_SPURR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2280 | *val = get_reg_val(id, kvmppc_get_spurr_hv(vcpu)); |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2281 | break; |
| 2282 | case KVM_REG_PPC_AMR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2283 | *val = get_reg_val(id, kvmppc_get_amr_hv(vcpu)); |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2284 | break; |
| 2285 | case KVM_REG_PPC_UAMOR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2286 | *val = get_reg_val(id, kvmppc_get_uamor_hv(vcpu)); |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2287 | break; |
Athira Rajeev | 7e4a145 | 2020-07-17 10:38:14 -0400 | [diff] [blame] | 2288 | case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCR1: |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2289 | i = id - KVM_REG_PPC_MMCR0; |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2290 | *val = get_reg_val(id, kvmppc_get_mmcr_hv(vcpu, i)); |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2291 | break; |
Athira Rajeev | 7e4a145 | 2020-07-17 10:38:14 -0400 | [diff] [blame] | 2292 | case KVM_REG_PPC_MMCR2: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2293 | *val = get_reg_val(id, kvmppc_get_mmcr_hv(vcpu, 2)); |
Athira Rajeev | 7e4a145 | 2020-07-17 10:38:14 -0400 | [diff] [blame] | 2294 | break; |
| 2295 | case KVM_REG_PPC_MMCRA: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2296 | *val = get_reg_val(id, kvmppc_get_mmcra_hv(vcpu)); |
Athira Rajeev | 7e4a145 | 2020-07-17 10:38:14 -0400 | [diff] [blame] | 2297 | break; |
| 2298 | case KVM_REG_PPC_MMCRS: |
| 2299 | *val = get_reg_val(id, vcpu->arch.mmcrs); |
| 2300 | break; |
Athira Rajeev | 5752fe0 | 2020-07-17 10:38:17 -0400 | [diff] [blame] | 2301 | case KVM_REG_PPC_MMCR3: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2302 | *val = get_reg_val(id, kvmppc_get_mmcr_hv(vcpu, 3)); |
Athira Rajeev | 5752fe0 | 2020-07-17 10:38:17 -0400 | [diff] [blame] | 2303 | break; |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2304 | case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: |
| 2305 | i = id - KVM_REG_PPC_PMC1; |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2306 | *val = get_reg_val(id, kvmppc_get_pmc_hv(vcpu, i)); |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 2307 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2308 | case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2: |
| 2309 | i = id - KVM_REG_PPC_SPMC1; |
| 2310 | *val = get_reg_val(id, vcpu->arch.spmc[i]); |
| 2311 | break; |
Paul Mackerras | 1494178 | 2013-09-06 13:11:18 +1000 | [diff] [blame] | 2312 | case KVM_REG_PPC_SIAR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2313 | *val = get_reg_val(id, kvmppc_get_siar_hv(vcpu)); |
Paul Mackerras | 1494178 | 2013-09-06 13:11:18 +1000 | [diff] [blame] | 2314 | break; |
| 2315 | case KVM_REG_PPC_SDAR: |
Shivaprasad G Bhat | 009f6f4 | 2024-06-05 13:06:28 +0000 | [diff] [blame] | 2316 | *val = get_reg_val(id, kvmppc_get_sdar_hv(vcpu)); |
Paul Mackerras | 1494178 | 2013-09-06 13:11:18 +1000 | [diff] [blame] | 2317 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2318 | case KVM_REG_PPC_SIER: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2319 | *val = get_reg_val(id, kvmppc_get_sier_hv(vcpu, 0)); |
Athira Rajeev | 5752fe0 | 2020-07-17 10:38:17 -0400 | [diff] [blame] | 2320 | break; |
| 2321 | case KVM_REG_PPC_SIER2: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2322 | *val = get_reg_val(id, kvmppc_get_sier_hv(vcpu, 1)); |
Athira Rajeev | 5752fe0 | 2020-07-17 10:38:17 -0400 | [diff] [blame] | 2323 | break; |
| 2324 | case KVM_REG_PPC_SIER3: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2325 | *val = get_reg_val(id, kvmppc_get_sier_hv(vcpu, 2)); |
Paul Mackerras | a8bd19e | 2012-09-25 20:32:30 +0000 | [diff] [blame] | 2326 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2327 | case KVM_REG_PPC_IAMR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2328 | *val = get_reg_val(id, kvmppc_get_iamr_hv(vcpu)); |
Paul Mackerras | a8bd19e | 2012-09-25 20:32:30 +0000 | [diff] [blame] | 2329 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2330 | case KVM_REG_PPC_PSPB: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2331 | *val = get_reg_val(id, kvmppc_get_pspb_hv(vcpu)); |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2332 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2333 | case KVM_REG_PPC_DPDES: |
Paul Mackerras | ff42df4 | 2019-08-27 11:35:40 +1000 | [diff] [blame] | 2334 | /* |
| 2335 | * On POWER9, where we are emulating msgsndp etc., |
| 2336 | * we return 1 bit for each vcpu, which can come from |
| 2337 | * either vcore->dpdes or doorbell_request. |
| 2338 | * On POWER8, doorbell_request is 0. |
| 2339 | */ |
Nicholas Piggin | 6398326 | 2021-11-23 19:52:30 +1000 | [diff] [blame] | 2340 | if (cpu_has_feature(CPU_FTR_ARCH_300)) |
| 2341 | *val = get_reg_val(id, vcpu->arch.doorbell_request); |
| 2342 | else |
| 2343 | *val = get_reg_val(id, vcpu->arch.vcore->dpdes); |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2344 | break; |
Paul Mackerras | 88b02cf9 | 2016-09-15 13:42:52 +1000 | [diff] [blame] | 2345 | case KVM_REG_PPC_VTB: |
Jordan Niethe | c8ae9b3 | 2023-09-14 13:05:54 +1000 | [diff] [blame] | 2346 | *val = get_reg_val(id, kvmppc_get_vtb(vcpu)); |
Paul Mackerras | 88b02cf9 | 2016-09-15 13:42:52 +1000 | [diff] [blame] | 2347 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2348 | case KVM_REG_PPC_DAWR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2349 | *val = get_reg_val(id, kvmppc_get_dawr0_hv(vcpu)); |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2350 | break; |
| 2351 | case KVM_REG_PPC_DAWRX: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2352 | *val = get_reg_val(id, kvmppc_get_dawrx0_hv(vcpu)); |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2353 | break; |
Ravi Bangoria | bd1de1a | 2020-12-16 16:12:18 +0530 | [diff] [blame] | 2354 | case KVM_REG_PPC_DAWR1: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2355 | *val = get_reg_val(id, kvmppc_get_dawr1_hv(vcpu)); |
Ravi Bangoria | bd1de1a | 2020-12-16 16:12:18 +0530 | [diff] [blame] | 2356 | break; |
| 2357 | case KVM_REG_PPC_DAWRX1: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2358 | *val = get_reg_val(id, kvmppc_get_dawrx1_hv(vcpu)); |
Ravi Bangoria | bd1de1a | 2020-12-16 16:12:18 +0530 | [diff] [blame] | 2359 | break; |
Shivaprasad G Bhat | 1a1e686 | 2024-06-05 13:06:42 +0000 | [diff] [blame] | 2360 | case KVM_REG_PPC_DEXCR: |
| 2361 | *val = get_reg_val(id, kvmppc_get_dexcr_hv(vcpu)); |
| 2362 | break; |
Shivaprasad G Bhat | e9eb790 | 2024-06-05 13:07:15 +0000 | [diff] [blame] | 2363 | case KVM_REG_PPC_HASHKEYR: |
| 2364 | *val = get_reg_val(id, kvmppc_get_hashkeyr_hv(vcpu)); |
| 2365 | break; |
Shivaprasad G Bhat | 9a0d2f4 | 2024-06-05 13:07:39 +0000 | [diff] [blame] | 2366 | case KVM_REG_PPC_HASHPKEYR: |
| 2367 | *val = get_reg_val(id, kvmppc_get_hashpkeyr_hv(vcpu)); |
| 2368 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2369 | case KVM_REG_PPC_CIABR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2370 | *val = get_reg_val(id, kvmppc_get_ciabr_hv(vcpu)); |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2371 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2372 | case KVM_REG_PPC_CSIGR: |
| 2373 | *val = get_reg_val(id, vcpu->arch.csigr); |
| 2374 | break; |
| 2375 | case KVM_REG_PPC_TACR: |
| 2376 | *val = get_reg_val(id, vcpu->arch.tacr); |
| 2377 | break; |
| 2378 | case KVM_REG_PPC_TCSCR: |
| 2379 | *val = get_reg_val(id, vcpu->arch.tcscr); |
| 2380 | break; |
| 2381 | case KVM_REG_PPC_PID: |
Jordan Niethe | 7028ac8 | 2023-09-14 13:05:53 +1000 | [diff] [blame] | 2382 | *val = get_reg_val(id, kvmppc_get_pid(vcpu)); |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2383 | break; |
| 2384 | case KVM_REG_PPC_ACOP: |
| 2385 | *val = get_reg_val(id, vcpu->arch.acop); |
| 2386 | break; |
| 2387 | case KVM_REG_PPC_WORT: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2388 | *val = get_reg_val(id, kvmppc_get_wort_hv(vcpu)); |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2389 | break; |
Paul Mackerras | e9cf1e0 | 2016-11-18 13:11:42 +1100 | [diff] [blame] | 2390 | case KVM_REG_PPC_TIDR: |
| 2391 | *val = get_reg_val(id, vcpu->arch.tid); |
| 2392 | break; |
| 2393 | case KVM_REG_PPC_PSSCR: |
| 2394 | *val = get_reg_val(id, vcpu->arch.psscr); |
| 2395 | break; |
Paul Mackerras | 55b665b | 2012-09-25 20:33:06 +0000 | [diff] [blame] | 2396 | case KVM_REG_PPC_VPA_ADDR: |
| 2397 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 2398 | *val = get_reg_val(id, vcpu->arch.vpa.next_gpa); |
| 2399 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 2400 | break; |
| 2401 | case KVM_REG_PPC_VPA_SLB: |
| 2402 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 2403 | val->vpaval.addr = vcpu->arch.slb_shadow.next_gpa; |
| 2404 | val->vpaval.length = vcpu->arch.slb_shadow.len; |
| 2405 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 2406 | break; |
| 2407 | case KVM_REG_PPC_VPA_DTL: |
| 2408 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 2409 | val->vpaval.addr = vcpu->arch.dtl.next_gpa; |
| 2410 | val->vpaval.length = vcpu->arch.dtl.len; |
| 2411 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 2412 | break; |
Paul Mackerras | 93b0f4d | 2013-09-06 13:17:46 +1000 | [diff] [blame] | 2413 | case KVM_REG_PPC_TB_OFFSET: |
Jordan Niethe | c8ae9b3 | 2023-09-14 13:05:54 +1000 | [diff] [blame] | 2414 | *val = get_reg_val(id, kvmppc_get_tb_offset(vcpu)); |
Paul Mackerras | 93b0f4d | 2013-09-06 13:17:46 +1000 | [diff] [blame] | 2415 | break; |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 2416 | case KVM_REG_PPC_LPCR: |
Alexey Kardashevskiy | a084024 | 2014-07-19 17:59:34 +1000 | [diff] [blame] | 2417 | case KVM_REG_PPC_LPCR_64: |
Jordan Niethe | c8ae9b3 | 2023-09-14 13:05:54 +1000 | [diff] [blame] | 2418 | *val = get_reg_val(id, kvmppc_get_lpcr(vcpu)); |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 2419 | break; |
Paul Mackerras | 4b8473c | 2013-09-20 14:52:39 +1000 | [diff] [blame] | 2420 | case KVM_REG_PPC_PPR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2421 | *val = get_reg_val(id, kvmppc_get_ppr_hv(vcpu)); |
Paul Mackerras | 4b8473c | 2013-09-20 14:52:39 +1000 | [diff] [blame] | 2422 | break; |
Michael Neuling | a7d80d0 | 2014-03-25 10:47:03 +1100 | [diff] [blame] | 2423 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
| 2424 | case KVM_REG_PPC_TFHAR: |
| 2425 | *val = get_reg_val(id, vcpu->arch.tfhar); |
| 2426 | break; |
| 2427 | case KVM_REG_PPC_TFIAR: |
| 2428 | *val = get_reg_val(id, vcpu->arch.tfiar); |
| 2429 | break; |
| 2430 | case KVM_REG_PPC_TEXASR: |
| 2431 | *val = get_reg_val(id, vcpu->arch.texasr); |
| 2432 | break; |
| 2433 | case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31: |
| 2434 | i = id - KVM_REG_PPC_TM_GPR0; |
| 2435 | *val = get_reg_val(id, vcpu->arch.gpr_tm[i]); |
| 2436 | break; |
| 2437 | case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63: |
| 2438 | { |
| 2439 | int j; |
| 2440 | i = id - KVM_REG_PPC_TM_VSR0; |
| 2441 | if (i < 32) |
| 2442 | for (j = 0; j < TS_FPRWIDTH; j++) |
| 2443 | val->vsxval[j] = vcpu->arch.fp_tm.fpr[i][j]; |
| 2444 | else { |
| 2445 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) |
| 2446 | val->vval = vcpu->arch.vr_tm.vr[i-32]; |
| 2447 | else |
| 2448 | r = -ENXIO; |
| 2449 | } |
| 2450 | break; |
| 2451 | } |
| 2452 | case KVM_REG_PPC_TM_CR: |
| 2453 | *val = get_reg_val(id, vcpu->arch.cr_tm); |
| 2454 | break; |
Paul Mackerras | 0d808df | 2016-11-07 15:09:58 +1100 | [diff] [blame] | 2455 | case KVM_REG_PPC_TM_XER: |
| 2456 | *val = get_reg_val(id, vcpu->arch.xer_tm); |
| 2457 | break; |
Michael Neuling | a7d80d0 | 2014-03-25 10:47:03 +1100 | [diff] [blame] | 2458 | case KVM_REG_PPC_TM_LR: |
| 2459 | *val = get_reg_val(id, vcpu->arch.lr_tm); |
| 2460 | break; |
| 2461 | case KVM_REG_PPC_TM_CTR: |
| 2462 | *val = get_reg_val(id, vcpu->arch.ctr_tm); |
| 2463 | break; |
| 2464 | case KVM_REG_PPC_TM_FPSCR: |
| 2465 | *val = get_reg_val(id, vcpu->arch.fp_tm.fpscr); |
| 2466 | break; |
| 2467 | case KVM_REG_PPC_TM_AMR: |
| 2468 | *val = get_reg_val(id, vcpu->arch.amr_tm); |
| 2469 | break; |
| 2470 | case KVM_REG_PPC_TM_PPR: |
| 2471 | *val = get_reg_val(id, vcpu->arch.ppr_tm); |
| 2472 | break; |
| 2473 | case KVM_REG_PPC_TM_VRSAVE: |
| 2474 | *val = get_reg_val(id, vcpu->arch.vrsave_tm); |
| 2475 | break; |
| 2476 | case KVM_REG_PPC_TM_VSCR: |
| 2477 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) |
| 2478 | *val = get_reg_val(id, vcpu->arch.vr_tm.vscr.u[3]); |
| 2479 | else |
| 2480 | r = -ENXIO; |
| 2481 | break; |
| 2482 | case KVM_REG_PPC_TM_DSCR: |
| 2483 | *val = get_reg_val(id, vcpu->arch.dscr_tm); |
| 2484 | break; |
| 2485 | case KVM_REG_PPC_TM_TAR: |
| 2486 | *val = get_reg_val(id, vcpu->arch.tar_tm); |
| 2487 | break; |
| 2488 | #endif |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 2489 | case KVM_REG_PPC_ARCH_COMPAT: |
Jordan Niethe | c8ae9b3 | 2023-09-14 13:05:54 +1000 | [diff] [blame] | 2490 | *val = get_reg_val(id, kvmppc_get_arch_compat(vcpu)); |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 2491 | break; |
Paul Mackerras | 5855564 | 2018-01-12 20:55:20 +1100 | [diff] [blame] | 2492 | case KVM_REG_PPC_DEC_EXPIRY: |
Jordan Niethe | 7028ac8 | 2023-09-14 13:05:53 +1000 | [diff] [blame] | 2493 | *val = get_reg_val(id, kvmppc_get_dec_expires(vcpu)); |
Paul Mackerras | 5855564 | 2018-01-12 20:55:20 +1100 | [diff] [blame] | 2494 | break; |
Paul Mackerras | a1f1582 | 2018-04-20 15:33:21 +1000 | [diff] [blame] | 2495 | case KVM_REG_PPC_ONLINE: |
| 2496 | *val = get_reg_val(id, vcpu->arch.online); |
| 2497 | break; |
Paul Mackerras | 3032341 | 2018-10-08 16:31:13 +1100 | [diff] [blame] | 2498 | case KVM_REG_PPC_PTCR: |
| 2499 | *val = get_reg_val(id, vcpu->kvm->arch.l1_ptcr); |
| 2500 | break; |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2501 | case KVM_REG_PPC_FSCR: |
| 2502 | *val = get_reg_val(id, kvmppc_get_fscr_hv(vcpu)); |
| 2503 | break; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 2504 | default: |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2505 | r = -EINVAL; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 2506 | break; |
| 2507 | } |
| 2508 | |
| 2509 | return r; |
| 2510 | } |
| 2511 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 2512 | static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, |
| 2513 | union kvmppc_one_reg *val) |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 2514 | { |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2515 | int r = 0; |
| 2516 | long int i; |
Paul Mackerras | 55b665b | 2012-09-25 20:33:06 +0000 | [diff] [blame] | 2517 | unsigned long addr, len; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 2518 | |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2519 | switch (id) { |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 2520 | case KVM_REG_PPC_HIOR: |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 2521 | /* Only allow this to be set to zero */ |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2522 | if (set_reg_val(id, *val)) |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 2523 | r = -EINVAL; |
| 2524 | break; |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2525 | case KVM_REG_PPC_DABR: |
| 2526 | vcpu->arch.dabr = set_reg_val(id, *val); |
| 2527 | break; |
Paul Mackerras | 8563bf5 | 2014-01-08 21:25:29 +1100 | [diff] [blame] | 2528 | case KVM_REG_PPC_DABRX: |
| 2529 | vcpu->arch.dabrx = set_reg_val(id, *val) & ~DABRX_HYP; |
| 2530 | break; |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2531 | case KVM_REG_PPC_DSCR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2532 | kvmppc_set_dscr_hv(vcpu, set_reg_val(id, *val)); |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2533 | break; |
| 2534 | case KVM_REG_PPC_PURR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2535 | kvmppc_set_purr_hv(vcpu, set_reg_val(id, *val)); |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2536 | break; |
| 2537 | case KVM_REG_PPC_SPURR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2538 | kvmppc_set_spurr_hv(vcpu, set_reg_val(id, *val)); |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2539 | break; |
| 2540 | case KVM_REG_PPC_AMR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2541 | kvmppc_set_amr_hv(vcpu, set_reg_val(id, *val)); |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2542 | break; |
| 2543 | case KVM_REG_PPC_UAMOR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2544 | kvmppc_set_uamor_hv(vcpu, set_reg_val(id, *val)); |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2545 | break; |
Athira Rajeev | 7e4a145 | 2020-07-17 10:38:14 -0400 | [diff] [blame] | 2546 | case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCR1: |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2547 | i = id - KVM_REG_PPC_MMCR0; |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2548 | kvmppc_set_mmcr_hv(vcpu, i, set_reg_val(id, *val)); |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2549 | break; |
Athira Rajeev | 7e4a145 | 2020-07-17 10:38:14 -0400 | [diff] [blame] | 2550 | case KVM_REG_PPC_MMCR2: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2551 | kvmppc_set_mmcr_hv(vcpu, 2, set_reg_val(id, *val)); |
Athira Rajeev | 7e4a145 | 2020-07-17 10:38:14 -0400 | [diff] [blame] | 2552 | break; |
| 2553 | case KVM_REG_PPC_MMCRA: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2554 | kvmppc_set_mmcra_hv(vcpu, set_reg_val(id, *val)); |
Athira Rajeev | 7e4a145 | 2020-07-17 10:38:14 -0400 | [diff] [blame] | 2555 | break; |
| 2556 | case KVM_REG_PPC_MMCRS: |
| 2557 | vcpu->arch.mmcrs = set_reg_val(id, *val); |
| 2558 | break; |
Athira Rajeev | 5752fe0 | 2020-07-17 10:38:17 -0400 | [diff] [blame] | 2559 | case KVM_REG_PPC_MMCR3: |
Shivaprasad G Bhat | f9ca6a1 | 2024-06-05 13:06:16 +0000 | [diff] [blame] | 2560 | kvmppc_set_mmcr_hv(vcpu, 3, set_reg_val(id, *val)); |
Athira Rajeev | 5752fe0 | 2020-07-17 10:38:17 -0400 | [diff] [blame] | 2561 | break; |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2562 | case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: |
| 2563 | i = id - KVM_REG_PPC_PMC1; |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2564 | kvmppc_set_pmc_hv(vcpu, i, set_reg_val(id, *val)); |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2565 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2566 | case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2: |
| 2567 | i = id - KVM_REG_PPC_SPMC1; |
| 2568 | vcpu->arch.spmc[i] = set_reg_val(id, *val); |
| 2569 | break; |
Paul Mackerras | 1494178 | 2013-09-06 13:11:18 +1000 | [diff] [blame] | 2570 | case KVM_REG_PPC_SIAR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2571 | kvmppc_set_siar_hv(vcpu, set_reg_val(id, *val)); |
Paul Mackerras | 1494178 | 2013-09-06 13:11:18 +1000 | [diff] [blame] | 2572 | break; |
| 2573 | case KVM_REG_PPC_SDAR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2574 | kvmppc_set_sdar_hv(vcpu, set_reg_val(id, *val)); |
Paul Mackerras | 1494178 | 2013-09-06 13:11:18 +1000 | [diff] [blame] | 2575 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2576 | case KVM_REG_PPC_SIER: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2577 | kvmppc_set_sier_hv(vcpu, 0, set_reg_val(id, *val)); |
Athira Rajeev | 5752fe0 | 2020-07-17 10:38:17 -0400 | [diff] [blame] | 2578 | break; |
| 2579 | case KVM_REG_PPC_SIER2: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2580 | kvmppc_set_sier_hv(vcpu, 1, set_reg_val(id, *val)); |
Athira Rajeev | 5752fe0 | 2020-07-17 10:38:17 -0400 | [diff] [blame] | 2581 | break; |
| 2582 | case KVM_REG_PPC_SIER3: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2583 | kvmppc_set_sier_hv(vcpu, 2, set_reg_val(id, *val)); |
Paul Mackerras | a8bd19e | 2012-09-25 20:32:30 +0000 | [diff] [blame] | 2584 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2585 | case KVM_REG_PPC_IAMR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2586 | kvmppc_set_iamr_hv(vcpu, set_reg_val(id, *val)); |
Paul Mackerras | a8bd19e | 2012-09-25 20:32:30 +0000 | [diff] [blame] | 2587 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2588 | case KVM_REG_PPC_PSPB: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2589 | kvmppc_set_pspb_hv(vcpu, set_reg_val(id, *val)); |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2590 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2591 | case KVM_REG_PPC_DPDES: |
Nicholas Piggin | 6398326 | 2021-11-23 19:52:30 +1000 | [diff] [blame] | 2592 | if (cpu_has_feature(CPU_FTR_ARCH_300)) |
| 2593 | vcpu->arch.doorbell_request = set_reg_val(id, *val) & 1; |
| 2594 | else |
| 2595 | vcpu->arch.vcore->dpdes = set_reg_val(id, *val); |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2596 | break; |
Paul Mackerras | 88b02cf9 | 2016-09-15 13:42:52 +1000 | [diff] [blame] | 2597 | case KVM_REG_PPC_VTB: |
Jordan Niethe | c8ae9b3 | 2023-09-14 13:05:54 +1000 | [diff] [blame] | 2598 | kvmppc_set_vtb(vcpu, set_reg_val(id, *val)); |
Paul Mackerras | 88b02cf9 | 2016-09-15 13:42:52 +1000 | [diff] [blame] | 2599 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2600 | case KVM_REG_PPC_DAWR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2601 | kvmppc_set_dawr0_hv(vcpu, set_reg_val(id, *val)); |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2602 | break; |
| 2603 | case KVM_REG_PPC_DAWRX: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2604 | kvmppc_set_dawrx0_hv(vcpu, set_reg_val(id, *val) & ~DAWRX_HYP); |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2605 | break; |
Ravi Bangoria | bd1de1a | 2020-12-16 16:12:18 +0530 | [diff] [blame] | 2606 | case KVM_REG_PPC_DAWR1: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2607 | kvmppc_set_dawr1_hv(vcpu, set_reg_val(id, *val)); |
Ravi Bangoria | bd1de1a | 2020-12-16 16:12:18 +0530 | [diff] [blame] | 2608 | break; |
| 2609 | case KVM_REG_PPC_DAWRX1: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2610 | kvmppc_set_dawrx1_hv(vcpu, set_reg_val(id, *val) & ~DAWRX_HYP); |
Ravi Bangoria | bd1de1a | 2020-12-16 16:12:18 +0530 | [diff] [blame] | 2611 | break; |
Shivaprasad G Bhat | 1a1e686 | 2024-06-05 13:06:42 +0000 | [diff] [blame] | 2612 | case KVM_REG_PPC_DEXCR: |
| 2613 | kvmppc_set_dexcr_hv(vcpu, set_reg_val(id, *val)); |
| 2614 | break; |
Shivaprasad G Bhat | e9eb790 | 2024-06-05 13:07:15 +0000 | [diff] [blame] | 2615 | case KVM_REG_PPC_HASHKEYR: |
| 2616 | kvmppc_set_hashkeyr_hv(vcpu, set_reg_val(id, *val)); |
| 2617 | break; |
Shivaprasad G Bhat | 9a0d2f4 | 2024-06-05 13:07:39 +0000 | [diff] [blame] | 2618 | case KVM_REG_PPC_HASHPKEYR: |
| 2619 | kvmppc_set_hashpkeyr_hv(vcpu, set_reg_val(id, *val)); |
| 2620 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2621 | case KVM_REG_PPC_CIABR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2622 | kvmppc_set_ciabr_hv(vcpu, set_reg_val(id, *val)); |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2623 | /* Don't allow setting breakpoints in hypervisor code */ |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2624 | if ((kvmppc_get_ciabr_hv(vcpu) & CIABR_PRIV) == CIABR_PRIV_HYPER) |
| 2625 | kvmppc_set_ciabr_hv(vcpu, kvmppc_get_ciabr_hv(vcpu) & ~CIABR_PRIV); |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2626 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2627 | case KVM_REG_PPC_CSIGR: |
| 2628 | vcpu->arch.csigr = set_reg_val(id, *val); |
| 2629 | break; |
| 2630 | case KVM_REG_PPC_TACR: |
| 2631 | vcpu->arch.tacr = set_reg_val(id, *val); |
| 2632 | break; |
| 2633 | case KVM_REG_PPC_TCSCR: |
| 2634 | vcpu->arch.tcscr = set_reg_val(id, *val); |
| 2635 | break; |
| 2636 | case KVM_REG_PPC_PID: |
Jordan Niethe | 7028ac8 | 2023-09-14 13:05:53 +1000 | [diff] [blame] | 2637 | kvmppc_set_pid(vcpu, set_reg_val(id, *val)); |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2638 | break; |
| 2639 | case KVM_REG_PPC_ACOP: |
| 2640 | vcpu->arch.acop = set_reg_val(id, *val); |
| 2641 | break; |
| 2642 | case KVM_REG_PPC_WORT: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2643 | kvmppc_set_wort_hv(vcpu, set_reg_val(id, *val)); |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 2644 | break; |
Paul Mackerras | e9cf1e0 | 2016-11-18 13:11:42 +1100 | [diff] [blame] | 2645 | case KVM_REG_PPC_TIDR: |
| 2646 | vcpu->arch.tid = set_reg_val(id, *val); |
| 2647 | break; |
| 2648 | case KVM_REG_PPC_PSSCR: |
| 2649 | vcpu->arch.psscr = set_reg_val(id, *val) & PSSCR_GUEST_VIS; |
| 2650 | break; |
Paul Mackerras | 55b665b | 2012-09-25 20:33:06 +0000 | [diff] [blame] | 2651 | case KVM_REG_PPC_VPA_ADDR: |
| 2652 | addr = set_reg_val(id, *val); |
| 2653 | r = -EINVAL; |
| 2654 | if (!addr && (vcpu->arch.slb_shadow.next_gpa || |
| 2655 | vcpu->arch.dtl.next_gpa)) |
| 2656 | break; |
| 2657 | r = set_vpa(vcpu, &vcpu->arch.vpa, addr, sizeof(struct lppaca)); |
| 2658 | break; |
| 2659 | case KVM_REG_PPC_VPA_SLB: |
| 2660 | addr = val->vpaval.addr; |
| 2661 | len = val->vpaval.length; |
| 2662 | r = -EINVAL; |
| 2663 | if (addr && !vcpu->arch.vpa.next_gpa) |
| 2664 | break; |
| 2665 | r = set_vpa(vcpu, &vcpu->arch.slb_shadow, addr, len); |
| 2666 | break; |
| 2667 | case KVM_REG_PPC_VPA_DTL: |
| 2668 | addr = val->vpaval.addr; |
| 2669 | len = val->vpaval.length; |
| 2670 | r = -EINVAL; |
Paul Mackerras | 9f8c8c7 | 2012-10-15 01:18:37 +0000 | [diff] [blame] | 2671 | if (addr && (len < sizeof(struct dtl_entry) || |
| 2672 | !vcpu->arch.vpa.next_gpa)) |
Paul Mackerras | 55b665b | 2012-09-25 20:33:06 +0000 | [diff] [blame] | 2673 | break; |
| 2674 | len -= len % sizeof(struct dtl_entry); |
| 2675 | r = set_vpa(vcpu, &vcpu->arch.dtl, addr, len); |
| 2676 | break; |
Paul Mackerras | 93b0f4d | 2013-09-06 13:17:46 +1000 | [diff] [blame] | 2677 | case KVM_REG_PPC_TB_OFFSET: |
Fabiano Rosas | 0a5bfb8 | 2022-08-16 19:25:17 -0300 | [diff] [blame] | 2678 | { |
Paul Mackerras | 93b0f4d | 2013-09-06 13:17:46 +1000 | [diff] [blame] | 2679 | /* round up to multiple of 2^24 */ |
Fabiano Rosas | 0a5bfb8 | 2022-08-16 19:25:17 -0300 | [diff] [blame] | 2680 | u64 tb_offset = ALIGN(set_reg_val(id, *val), 1UL << 24); |
| 2681 | |
| 2682 | /* |
| 2683 | * Now that we know the timebase offset, update the |
| 2684 | * decrementer expiry with a guest timebase value. If |
| 2685 | * the userspace does not set DEC_EXPIRY, this ensures |
| 2686 | * a migrated vcpu at least starts with an expired |
| 2687 | * decrementer, which is better than a large one that |
| 2688 | * causes a hang. |
| 2689 | */ |
Jordan Niethe | c8ae9b3 | 2023-09-14 13:05:54 +1000 | [diff] [blame] | 2690 | kvmppc_set_tb_offset(vcpu, tb_offset); |
Jordan Niethe | 7028ac8 | 2023-09-14 13:05:53 +1000 | [diff] [blame] | 2691 | if (!kvmppc_get_dec_expires(vcpu) && tb_offset) |
| 2692 | kvmppc_set_dec_expires(vcpu, get_tb() + tb_offset); |
Fabiano Rosas | 0a5bfb8 | 2022-08-16 19:25:17 -0300 | [diff] [blame] | 2693 | |
Jordan Niethe | c8ae9b3 | 2023-09-14 13:05:54 +1000 | [diff] [blame] | 2694 | kvmppc_set_tb_offset(vcpu, tb_offset); |
Paul Mackerras | 93b0f4d | 2013-09-06 13:17:46 +1000 | [diff] [blame] | 2695 | break; |
Fabiano Rosas | 0a5bfb8 | 2022-08-16 19:25:17 -0300 | [diff] [blame] | 2696 | } |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 2697 | case KVM_REG_PPC_LPCR: |
Alexey Kardashevskiy | a084024 | 2014-07-19 17:59:34 +1000 | [diff] [blame] | 2698 | kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), true); |
| 2699 | break; |
| 2700 | case KVM_REG_PPC_LPCR_64: |
| 2701 | kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), false); |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 2702 | break; |
Paul Mackerras | 4b8473c | 2013-09-20 14:52:39 +1000 | [diff] [blame] | 2703 | case KVM_REG_PPC_PPR: |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2704 | kvmppc_set_ppr_hv(vcpu, set_reg_val(id, *val)); |
Paul Mackerras | 4b8473c | 2013-09-20 14:52:39 +1000 | [diff] [blame] | 2705 | break; |
Michael Neuling | a7d80d0 | 2014-03-25 10:47:03 +1100 | [diff] [blame] | 2706 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
| 2707 | case KVM_REG_PPC_TFHAR: |
| 2708 | vcpu->arch.tfhar = set_reg_val(id, *val); |
| 2709 | break; |
| 2710 | case KVM_REG_PPC_TFIAR: |
| 2711 | vcpu->arch.tfiar = set_reg_val(id, *val); |
| 2712 | break; |
| 2713 | case KVM_REG_PPC_TEXASR: |
| 2714 | vcpu->arch.texasr = set_reg_val(id, *val); |
| 2715 | break; |
| 2716 | case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31: |
| 2717 | i = id - KVM_REG_PPC_TM_GPR0; |
| 2718 | vcpu->arch.gpr_tm[i] = set_reg_val(id, *val); |
| 2719 | break; |
| 2720 | case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63: |
| 2721 | { |
| 2722 | int j; |
| 2723 | i = id - KVM_REG_PPC_TM_VSR0; |
| 2724 | if (i < 32) |
| 2725 | for (j = 0; j < TS_FPRWIDTH; j++) |
| 2726 | vcpu->arch.fp_tm.fpr[i][j] = val->vsxval[j]; |
| 2727 | else |
| 2728 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) |
| 2729 | vcpu->arch.vr_tm.vr[i-32] = val->vval; |
| 2730 | else |
| 2731 | r = -ENXIO; |
| 2732 | break; |
| 2733 | } |
| 2734 | case KVM_REG_PPC_TM_CR: |
| 2735 | vcpu->arch.cr_tm = set_reg_val(id, *val); |
| 2736 | break; |
Paul Mackerras | 0d808df | 2016-11-07 15:09:58 +1100 | [diff] [blame] | 2737 | case KVM_REG_PPC_TM_XER: |
| 2738 | vcpu->arch.xer_tm = set_reg_val(id, *val); |
| 2739 | break; |
Michael Neuling | a7d80d0 | 2014-03-25 10:47:03 +1100 | [diff] [blame] | 2740 | case KVM_REG_PPC_TM_LR: |
| 2741 | vcpu->arch.lr_tm = set_reg_val(id, *val); |
| 2742 | break; |
| 2743 | case KVM_REG_PPC_TM_CTR: |
| 2744 | vcpu->arch.ctr_tm = set_reg_val(id, *val); |
| 2745 | break; |
| 2746 | case KVM_REG_PPC_TM_FPSCR: |
| 2747 | vcpu->arch.fp_tm.fpscr = set_reg_val(id, *val); |
| 2748 | break; |
| 2749 | case KVM_REG_PPC_TM_AMR: |
| 2750 | vcpu->arch.amr_tm = set_reg_val(id, *val); |
| 2751 | break; |
| 2752 | case KVM_REG_PPC_TM_PPR: |
| 2753 | vcpu->arch.ppr_tm = set_reg_val(id, *val); |
| 2754 | break; |
| 2755 | case KVM_REG_PPC_TM_VRSAVE: |
| 2756 | vcpu->arch.vrsave_tm = set_reg_val(id, *val); |
| 2757 | break; |
| 2758 | case KVM_REG_PPC_TM_VSCR: |
| 2759 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) |
| 2760 | vcpu->arch.vr.vscr.u[3] = set_reg_val(id, *val); |
| 2761 | else |
| 2762 | r = - ENXIO; |
| 2763 | break; |
| 2764 | case KVM_REG_PPC_TM_DSCR: |
| 2765 | vcpu->arch.dscr_tm = set_reg_val(id, *val); |
| 2766 | break; |
| 2767 | case KVM_REG_PPC_TM_TAR: |
| 2768 | vcpu->arch.tar_tm = set_reg_val(id, *val); |
| 2769 | break; |
| 2770 | #endif |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 2771 | case KVM_REG_PPC_ARCH_COMPAT: |
| 2772 | r = kvmppc_set_arch_compat(vcpu, set_reg_val(id, *val)); |
| 2773 | break; |
Paul Mackerras | 5855564 | 2018-01-12 20:55:20 +1100 | [diff] [blame] | 2774 | case KVM_REG_PPC_DEC_EXPIRY: |
Jordan Niethe | 7028ac8 | 2023-09-14 13:05:53 +1000 | [diff] [blame] | 2775 | kvmppc_set_dec_expires(vcpu, set_reg_val(id, *val)); |
Paul Mackerras | 5855564 | 2018-01-12 20:55:20 +1100 | [diff] [blame] | 2776 | break; |
Paul Mackerras | a1f1582 | 2018-04-20 15:33:21 +1000 | [diff] [blame] | 2777 | case KVM_REG_PPC_ONLINE: |
Paul Mackerras | 7aa1584 | 2018-04-20 19:53:22 +1000 | [diff] [blame] | 2778 | i = set_reg_val(id, *val); |
| 2779 | if (i && !vcpu->arch.online) |
| 2780 | atomic_inc(&vcpu->arch.vcore->online_count); |
| 2781 | else if (!i && vcpu->arch.online) |
| 2782 | atomic_dec(&vcpu->arch.vcore->online_count); |
| 2783 | vcpu->arch.online = i; |
Paul Mackerras | a1f1582 | 2018-04-20 15:33:21 +1000 | [diff] [blame] | 2784 | break; |
Paul Mackerras | 3032341 | 2018-10-08 16:31:13 +1100 | [diff] [blame] | 2785 | case KVM_REG_PPC_PTCR: |
| 2786 | vcpu->kvm->arch.l1_ptcr = set_reg_val(id, *val); |
| 2787 | break; |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 2788 | case KVM_REG_PPC_FSCR: |
| 2789 | kvmppc_set_fscr_hv(vcpu, set_reg_val(id, *val)); |
| 2790 | break; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 2791 | default: |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 2792 | r = -EINVAL; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 2793 | break; |
| 2794 | } |
| 2795 | |
| 2796 | return r; |
| 2797 | } |
| 2798 | |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 2799 | /* |
| 2800 | * On POWER9, threads are independent and can be in different partitions. |
| 2801 | * Therefore we consider each thread to be a subcore. |
| 2802 | * There is a restriction that all threads have to be in the same |
| 2803 | * MMU mode (radix or HPT), unfortunately, but since we only support |
| 2804 | * HPT guests on a HPT host so far, that isn't an impediment yet. |
| 2805 | */ |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 2806 | static int threads_per_vcore(struct kvm *kvm) |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 2807 | { |
Nicholas Piggin | aaae8c7 | 2021-05-28 19:07:42 +1000 | [diff] [blame] | 2808 | if (cpu_has_feature(CPU_FTR_ARCH_300)) |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 2809 | return 1; |
| 2810 | return threads_per_subcore; |
| 2811 | } |
| 2812 | |
Sam Bobroff | 1e175d2 | 2018-07-25 16:12:02 +1000 | [diff] [blame] | 2813 | static struct kvmppc_vcore *kvmppc_vcore_create(struct kvm *kvm, int id) |
Stewart Smith | de9bdd1 | 2014-07-18 14:18:42 +1000 | [diff] [blame] | 2814 | { |
| 2815 | struct kvmppc_vcore *vcore; |
| 2816 | |
| 2817 | vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL); |
| 2818 | |
| 2819 | if (vcore == NULL) |
| 2820 | return NULL; |
| 2821 | |
Stewart Smith | de9bdd1 | 2014-07-18 14:18:42 +1000 | [diff] [blame] | 2822 | spin_lock_init(&vcore->lock); |
Paul Mackerras | 2711e24 | 2014-12-04 16:43:28 +1100 | [diff] [blame] | 2823 | spin_lock_init(&vcore->stoltb_lock); |
Davidlohr Bueso | da4ad88 | 2020-04-23 22:48:37 -0700 | [diff] [blame] | 2824 | rcuwait_init(&vcore->wait); |
Stewart Smith | de9bdd1 | 2014-07-18 14:18:42 +1000 | [diff] [blame] | 2825 | vcore->preempt_tb = TB_NIL; |
| 2826 | vcore->lpcr = kvm->arch.lpcr; |
Sam Bobroff | 1e175d2 | 2018-07-25 16:12:02 +1000 | [diff] [blame] | 2827 | vcore->first_vcpuid = id; |
Stewart Smith | de9bdd1 | 2014-07-18 14:18:42 +1000 | [diff] [blame] | 2828 | vcore->kvm = kvm; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2829 | INIT_LIST_HEAD(&vcore->preempt_list); |
Stewart Smith | de9bdd1 | 2014-07-18 14:18:42 +1000 | [diff] [blame] | 2830 | |
| 2831 | return vcore; |
| 2832 | } |
| 2833 | |
Paul Mackerras | b6c295d | 2015-03-28 14:21:02 +1100 | [diff] [blame] | 2834 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING |
| 2835 | static struct debugfs_timings_element { |
| 2836 | const char *name; |
| 2837 | size_t offset; |
| 2838 | } timings[] = { |
Fabiano Rosas | c3fa64c | 2022-05-25 10:05:52 -0300 | [diff] [blame] | 2839 | #ifdef CONFIG_KVM_BOOK3S_HV_P9_TIMING |
Fabiano Rosas | b44bb1b | 2022-05-25 10:05:54 -0300 | [diff] [blame] | 2840 | {"vcpu_entry", offsetof(struct kvm_vcpu, arch.vcpu_entry)}, |
| 2841 | {"guest_entry", offsetof(struct kvm_vcpu, arch.guest_entry)}, |
| 2842 | {"in_guest", offsetof(struct kvm_vcpu, arch.in_guest)}, |
| 2843 | {"guest_exit", offsetof(struct kvm_vcpu, arch.guest_exit)}, |
| 2844 | {"vcpu_exit", offsetof(struct kvm_vcpu, arch.vcpu_exit)}, |
| 2845 | {"hypercall", offsetof(struct kvm_vcpu, arch.hcall)}, |
| 2846 | {"page_fault", offsetof(struct kvm_vcpu, arch.pg_fault)}, |
Fabiano Rosas | c3fa64c | 2022-05-25 10:05:52 -0300 | [diff] [blame] | 2847 | #else |
Paul Mackerras | b6c295d | 2015-03-28 14:21:02 +1100 | [diff] [blame] | 2848 | {"rm_entry", offsetof(struct kvm_vcpu, arch.rm_entry)}, |
| 2849 | {"rm_intr", offsetof(struct kvm_vcpu, arch.rm_intr)}, |
| 2850 | {"rm_exit", offsetof(struct kvm_vcpu, arch.rm_exit)}, |
| 2851 | {"guest", offsetof(struct kvm_vcpu, arch.guest_time)}, |
| 2852 | {"cede", offsetof(struct kvm_vcpu, arch.cede_time)}, |
Fabiano Rosas | c3fa64c | 2022-05-25 10:05:52 -0300 | [diff] [blame] | 2853 | #endif |
Paul Mackerras | b6c295d | 2015-03-28 14:21:02 +1100 | [diff] [blame] | 2854 | }; |
| 2855 | |
Thomas Meyer | 4bb817ed | 2017-09-03 14:19:31 +0200 | [diff] [blame] | 2856 | #define N_TIMINGS (ARRAY_SIZE(timings)) |
Paul Mackerras | b6c295d | 2015-03-28 14:21:02 +1100 | [diff] [blame] | 2857 | |
| 2858 | struct debugfs_timings_state { |
| 2859 | struct kvm_vcpu *vcpu; |
| 2860 | unsigned int buflen; |
| 2861 | char buf[N_TIMINGS * 100]; |
| 2862 | }; |
| 2863 | |
| 2864 | static int debugfs_timings_open(struct inode *inode, struct file *file) |
| 2865 | { |
| 2866 | struct kvm_vcpu *vcpu = inode->i_private; |
| 2867 | struct debugfs_timings_state *p; |
| 2868 | |
| 2869 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
| 2870 | if (!p) |
| 2871 | return -ENOMEM; |
| 2872 | |
| 2873 | kvm_get_kvm(vcpu->kvm); |
| 2874 | p->vcpu = vcpu; |
| 2875 | file->private_data = p; |
| 2876 | |
| 2877 | return nonseekable_open(inode, file); |
| 2878 | } |
| 2879 | |
| 2880 | static int debugfs_timings_release(struct inode *inode, struct file *file) |
| 2881 | { |
| 2882 | struct debugfs_timings_state *p = file->private_data; |
| 2883 | |
| 2884 | kvm_put_kvm(p->vcpu->kvm); |
| 2885 | kfree(p); |
| 2886 | return 0; |
| 2887 | } |
| 2888 | |
| 2889 | static ssize_t debugfs_timings_read(struct file *file, char __user *buf, |
| 2890 | size_t len, loff_t *ppos) |
| 2891 | { |
| 2892 | struct debugfs_timings_state *p = file->private_data; |
| 2893 | struct kvm_vcpu *vcpu = p->vcpu; |
| 2894 | char *s, *buf_end; |
| 2895 | struct kvmhv_tb_accumulator tb; |
| 2896 | u64 count; |
| 2897 | loff_t pos; |
| 2898 | ssize_t n; |
| 2899 | int i, loops; |
| 2900 | bool ok; |
| 2901 | |
| 2902 | if (!p->buflen) { |
| 2903 | s = p->buf; |
| 2904 | buf_end = s + sizeof(p->buf); |
| 2905 | for (i = 0; i < N_TIMINGS; ++i) { |
| 2906 | struct kvmhv_tb_accumulator *acc; |
| 2907 | |
| 2908 | acc = (struct kvmhv_tb_accumulator *) |
| 2909 | ((unsigned long)vcpu + timings[i].offset); |
| 2910 | ok = false; |
| 2911 | for (loops = 0; loops < 1000; ++loops) { |
| 2912 | count = acc->seqcount; |
| 2913 | if (!(count & 1)) { |
| 2914 | smp_rmb(); |
| 2915 | tb = *acc; |
| 2916 | smp_rmb(); |
| 2917 | if (count == acc->seqcount) { |
| 2918 | ok = true; |
| 2919 | break; |
| 2920 | } |
| 2921 | } |
| 2922 | udelay(1); |
| 2923 | } |
| 2924 | if (!ok) |
| 2925 | snprintf(s, buf_end - s, "%s: stuck\n", |
| 2926 | timings[i].name); |
| 2927 | else |
| 2928 | snprintf(s, buf_end - s, |
| 2929 | "%s: %llu %llu %llu %llu\n", |
| 2930 | timings[i].name, count / 2, |
| 2931 | tb_to_ns(tb.tb_total), |
| 2932 | tb_to_ns(tb.tb_min), |
| 2933 | tb_to_ns(tb.tb_max)); |
| 2934 | s += strlen(s); |
| 2935 | } |
| 2936 | p->buflen = s - p->buf; |
| 2937 | } |
| 2938 | |
| 2939 | pos = *ppos; |
| 2940 | if (pos >= p->buflen) |
| 2941 | return 0; |
| 2942 | if (len > p->buflen - pos) |
| 2943 | len = p->buflen - pos; |
| 2944 | n = copy_to_user(buf, p->buf + pos, len); |
| 2945 | if (n) { |
| 2946 | if (n == len) |
| 2947 | return -EFAULT; |
| 2948 | len -= n; |
| 2949 | } |
| 2950 | *ppos = pos + len; |
| 2951 | return len; |
| 2952 | } |
| 2953 | |
| 2954 | static ssize_t debugfs_timings_write(struct file *file, const char __user *buf, |
| 2955 | size_t len, loff_t *ppos) |
| 2956 | { |
| 2957 | return -EACCES; |
| 2958 | } |
| 2959 | |
| 2960 | static const struct file_operations debugfs_timings_ops = { |
| 2961 | .owner = THIS_MODULE, |
| 2962 | .open = debugfs_timings_open, |
| 2963 | .release = debugfs_timings_release, |
| 2964 | .read = debugfs_timings_read, |
| 2965 | .write = debugfs_timings_write, |
| 2966 | .llseek = generic_file_llseek, |
| 2967 | }; |
| 2968 | |
| 2969 | /* Create a debugfs directory for the vcpu */ |
Alexey Kardashevskiy | faf01ae | 2022-01-11 11:54:04 +1100 | [diff] [blame] | 2970 | static int kvmppc_arch_create_vcpu_debugfs_hv(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry) |
Paul Mackerras | b6c295d | 2015-03-28 14:21:02 +1100 | [diff] [blame] | 2971 | { |
Fabiano Rosas | c3fa64c | 2022-05-25 10:05:52 -0300 | [diff] [blame] | 2972 | if (cpu_has_feature(CPU_FTR_ARCH_300) == IS_ENABLED(CONFIG_KVM_BOOK3S_HV_P9_TIMING)) |
| 2973 | debugfs_create_file("timings", 0444, debugfs_dentry, vcpu, |
| 2974 | &debugfs_timings_ops); |
Alexey Kardashevskiy | faf01ae | 2022-01-11 11:54:04 +1100 | [diff] [blame] | 2975 | return 0; |
Paul Mackerras | b6c295d | 2015-03-28 14:21:02 +1100 | [diff] [blame] | 2976 | } |
| 2977 | |
| 2978 | #else /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */ |
Alexey Kardashevskiy | faf01ae | 2022-01-11 11:54:04 +1100 | [diff] [blame] | 2979 | static int kvmppc_arch_create_vcpu_debugfs_hv(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry) |
Paul Mackerras | b6c295d | 2015-03-28 14:21:02 +1100 | [diff] [blame] | 2980 | { |
Alexey Kardashevskiy | faf01ae | 2022-01-11 11:54:04 +1100 | [diff] [blame] | 2981 | return 0; |
Paul Mackerras | b6c295d | 2015-03-28 14:21:02 +1100 | [diff] [blame] | 2982 | } |
| 2983 | #endif /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */ |
| 2984 | |
Sean Christopherson | ff030fd | 2019-12-18 13:55:00 -0800 | [diff] [blame] | 2985 | static int kvmppc_core_vcpu_create_hv(struct kvm_vcpu *vcpu) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2986 | { |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 2987 | int err; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2988 | int core; |
| 2989 | struct kvmppc_vcore *vcore; |
Sean Christopherson | ff030fd | 2019-12-18 13:55:00 -0800 | [diff] [blame] | 2990 | struct kvm *kvm; |
| 2991 | unsigned int id; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2992 | |
Sean Christopherson | ff030fd | 2019-12-18 13:55:00 -0800 | [diff] [blame] | 2993 | kvm = vcpu->kvm; |
| 2994 | id = vcpu->vcpu_id; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2995 | |
| 2996 | vcpu->arch.shared = &vcpu->arch.shregs; |
Alexander Graf | 5deb8e7 | 2014-04-24 13:46:24 +0200 | [diff] [blame] | 2997 | #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE |
| 2998 | /* |
| 2999 | * The shared struct is never shared on HV, |
| 3000 | * so we can always use host endianness |
| 3001 | */ |
| 3002 | #ifdef __BIG_ENDIAN__ |
| 3003 | vcpu->arch.shared_big_endian = true; |
| 3004 | #else |
| 3005 | vcpu->arch.shared_big_endian = false; |
| 3006 | #endif |
| 3007 | #endif |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 3008 | |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 3009 | if (kvmhv_is_nestedv2()) { |
| 3010 | err = kvmhv_nestedv2_vcpu_create(vcpu, &vcpu->arch.nestedv2_io); |
| 3011 | if (err < 0) |
| 3012 | return err; |
| 3013 | } |
| 3014 | |
| 3015 | kvmppc_set_mmcr_hv(vcpu, 0, MMCR0_FC); |
Nicholas Piggin | 245ebf8 | 2021-11-23 19:51:49 +1000 | [diff] [blame] | 3016 | if (cpu_has_feature(CPU_FTR_ARCH_31)) { |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 3017 | kvmppc_set_mmcr_hv(vcpu, 0, kvmppc_get_mmcr_hv(vcpu, 0) | MMCR0_PMCCEXT); |
| 3018 | kvmppc_set_mmcra_hv(vcpu, MMCRA_BHRB_DISABLE); |
Nicholas Piggin | 245ebf8 | 2021-11-23 19:51:49 +1000 | [diff] [blame] | 3019 | } |
| 3020 | |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 3021 | kvmppc_set_ctrl_hv(vcpu, CTRL_RUNLATCH); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 3022 | /* default to host PVR, since we can't spoof it */ |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 3023 | kvmppc_set_pvr_hv(vcpu, mfspr(SPRN_PVR)); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 3024 | spin_lock_init(&vcpu->arch.vpa_update_lock); |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 3025 | spin_lock_init(&vcpu->arch.tbacct_lock); |
| 3026 | vcpu->arch.busy_preempt = TB_NIL; |
Jordan Niethe | 6de2e83 | 2023-09-14 13:05:56 +1000 | [diff] [blame] | 3027 | __kvmppc_set_msr_hv(vcpu, MSR_ME); |
Anton Blanchard | d682916 | 2014-01-08 21:25:30 +1100 | [diff] [blame] | 3028 | vcpu->arch.intr_msr = MSR_SF | MSR_ME; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 3029 | |
Paul Mackerras | 769377f | 2017-02-15 14:30:17 +1100 | [diff] [blame] | 3030 | /* |
| 3031 | * Set the default HFSCR for the guest from the host value. |
Paul Mackerras | a3800ef | 2023-03-08 17:36:11 +1100 | [diff] [blame] | 3032 | * This value is only used on POWER9 and later. |
| 3033 | * On >= POWER9, we want to virtualize the doorbell facility, so we |
Paul Mackerras | f3c99f9 | 2018-10-08 16:31:12 +1100 | [diff] [blame] | 3034 | * don't set the HFSCR_MSGP bit, and that causes those instructions |
| 3035 | * to trap and then we emulate them. |
Paul Mackerras | 769377f | 2017-02-15 14:30:17 +1100 | [diff] [blame] | 3036 | */ |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 3037 | kvmppc_set_hfscr_hv(vcpu, HFSCR_TAR | HFSCR_EBB | HFSCR_PM | HFSCR_BHRB | |
| 3038 | HFSCR_DSCR | HFSCR_VECVSX | HFSCR_FP); |
Paul Mackerras | a3800ef | 2023-03-08 17:36:11 +1100 | [diff] [blame] | 3039 | |
| 3040 | /* On POWER10 and later, allow prefixed instructions */ |
| 3041 | if (cpu_has_feature(CPU_FTR_ARCH_31)) |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 3042 | kvmppc_set_hfscr_hv(vcpu, kvmppc_get_hfscr_hv(vcpu) | HFSCR_PREFIX); |
Paul Mackerras | a3800ef | 2023-03-08 17:36:11 +1100 | [diff] [blame] | 3043 | |
Paul Mackerras | f3c99f9 | 2018-10-08 16:31:12 +1100 | [diff] [blame] | 3044 | if (cpu_has_feature(CPU_FTR_HVMODE)) { |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 3045 | kvmppc_set_hfscr_hv(vcpu, kvmppc_get_hfscr_hv(vcpu) & mfspr(SPRN_HFSCR)); |
| 3046 | |
Nicholas Piggin | bd31ecf | 2021-07-16 12:43:09 +1000 | [diff] [blame] | 3047 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
Paul Mackerras | f3c99f9 | 2018-10-08 16:31:12 +1100 | [diff] [blame] | 3048 | if (cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST)) |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 3049 | kvmppc_set_hfscr_hv(vcpu, kvmppc_get_hfscr_hv(vcpu) | HFSCR_TM); |
Nicholas Piggin | bd31ecf | 2021-07-16 12:43:09 +1000 | [diff] [blame] | 3050 | #endif |
Paul Mackerras | f3c99f9 | 2018-10-08 16:31:12 +1100 | [diff] [blame] | 3051 | } |
| 3052 | if (cpu_has_feature(CPU_FTR_TM_COMP)) |
Paul Mackerras | 4bb3c7a | 2018-03-21 21:32:01 +1100 | [diff] [blame] | 3053 | vcpu->arch.hfscr |= HFSCR_TM; |
Paul Mackerras | 769377f | 2017-02-15 14:30:17 +1100 | [diff] [blame] | 3054 | |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 3055 | vcpu->arch.hfscr_permitted = kvmppc_get_hfscr_hv(vcpu); |
Nicholas Piggin | 8b210a8 | 2021-08-12 02:00:40 +1000 | [diff] [blame] | 3056 | |
Nicholas Piggin | 9d3ddb8 | 2021-11-23 19:51:53 +1000 | [diff] [blame] | 3057 | /* |
Nicholas Piggin | 022ecb9 | 2021-11-23 19:52:15 +1000 | [diff] [blame] | 3058 | * PM, EBB, TM are demand-faulted so start with it clear. |
Nicholas Piggin | 9d3ddb8 | 2021-11-23 19:51:53 +1000 | [diff] [blame] | 3059 | */ |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 3060 | kvmppc_set_hfscr_hv(vcpu, kvmppc_get_hfscr_hv(vcpu) & ~(HFSCR_PM | HFSCR_EBB | HFSCR_TM)); |
Nicholas Piggin | 9d3ddb8 | 2021-11-23 19:51:53 +1000 | [diff] [blame] | 3061 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 3062 | kvmppc_mmu_book3s_hv_init(vcpu); |
| 3063 | |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 3064 | vcpu->arch.state = KVMPPC_VCPU_NOTREADY; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3065 | |
| 3066 | init_waitqueue_head(&vcpu->arch.cpu_run); |
| 3067 | |
| 3068 | mutex_lock(&kvm->lock); |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 3069 | vcore = NULL; |
| 3070 | err = -EINVAL; |
Sam Bobroff | 1e175d2 | 2018-07-25 16:12:02 +1000 | [diff] [blame] | 3071 | if (cpu_has_feature(CPU_FTR_ARCH_300)) { |
Paul Mackerras | b5c6f76 | 2018-07-26 15:38:41 +1000 | [diff] [blame] | 3072 | if (id >= (KVM_MAX_VCPUS * kvm->arch.emul_smt_mode)) { |
| 3073 | pr_devel("KVM: VCPU ID too high\n"); |
| 3074 | core = KVM_MAX_VCORES; |
| 3075 | } else { |
| 3076 | BUG_ON(kvm->arch.smt_mode != 1); |
| 3077 | core = kvmppc_pack_vcpu_id(kvm, id); |
| 3078 | } |
Sam Bobroff | 1e175d2 | 2018-07-25 16:12:02 +1000 | [diff] [blame] | 3079 | } else { |
| 3080 | core = id / kvm->arch.smt_mode; |
| 3081 | } |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 3082 | if (core < KVM_MAX_VCORES) { |
| 3083 | vcore = kvm->arch.vcores[core]; |
Sam Bobroff | 1e175d2 | 2018-07-25 16:12:02 +1000 | [diff] [blame] | 3084 | if (vcore && cpu_has_feature(CPU_FTR_ARCH_300)) { |
| 3085 | pr_devel("KVM: collision on id %u", id); |
| 3086 | vcore = NULL; |
| 3087 | } else if (!vcore) { |
Paul Mackerras | 0d4ee88 | 2019-05-23 16:35:34 +1000 | [diff] [blame] | 3088 | /* |
| 3089 | * Take mmu_setup_lock for mutual exclusion |
| 3090 | * with kvmppc_update_lpcr(). |
| 3091 | */ |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 3092 | err = -ENOMEM; |
Sam Bobroff | 1e175d2 | 2018-07-25 16:12:02 +1000 | [diff] [blame] | 3093 | vcore = kvmppc_vcore_create(kvm, |
| 3094 | id & ~(kvm->arch.smt_mode - 1)); |
Paul Mackerras | 0d4ee88 | 2019-05-23 16:35:34 +1000 | [diff] [blame] | 3095 | mutex_lock(&kvm->arch.mmu_setup_lock); |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 3096 | kvm->arch.vcores[core] = vcore; |
| 3097 | kvm->arch.online_vcores++; |
Paul Mackerras | 0d4ee88 | 2019-05-23 16:35:34 +1000 | [diff] [blame] | 3098 | mutex_unlock(&kvm->arch.mmu_setup_lock); |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 3099 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3100 | } |
| 3101 | mutex_unlock(&kvm->lock); |
| 3102 | |
| 3103 | if (!vcore) |
Sean Christopherson | ff030fd | 2019-12-18 13:55:00 -0800 | [diff] [blame] | 3104 | return err; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3105 | |
| 3106 | spin_lock(&vcore->lock); |
| 3107 | ++vcore->num_threads; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3108 | spin_unlock(&vcore->lock); |
| 3109 | vcpu->arch.vcore = vcore; |
Paul Mackerras | e0b7ec0 | 2014-01-08 21:25:20 +1100 | [diff] [blame] | 3110 | vcpu->arch.ptid = vcpu->vcpu_id - vcore->first_vcpuid; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3111 | vcpu->arch.thread_cpu = -1; |
Paul Mackerras | a29ebea | 2017-01-30 21:21:50 +1100 | [diff] [blame] | 3112 | vcpu->arch.prev_cpu = -1; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3113 | |
Alexander Graf | af8f38b | 2011-08-10 13:57:08 +0200 | [diff] [blame] | 3114 | vcpu->arch.cpu_type = KVM_CPU_3S_64; |
| 3115 | kvmppc_sanity_check(vcpu); |
| 3116 | |
Sean Christopherson | c50bfbd | 2019-12-18 13:54:57 -0800 | [diff] [blame] | 3117 | return 0; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 3118 | } |
| 3119 | |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 3120 | static int kvmhv_set_smt_mode(struct kvm *kvm, unsigned long smt_mode, |
| 3121 | unsigned long flags) |
| 3122 | { |
| 3123 | int err; |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 3124 | int esmt = 0; |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 3125 | |
| 3126 | if (flags) |
| 3127 | return -EINVAL; |
| 3128 | if (smt_mode > MAX_SMT_THREADS || !is_power_of_2(smt_mode)) |
| 3129 | return -EINVAL; |
| 3130 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) { |
| 3131 | /* |
| 3132 | * On POWER8 (or POWER7), the threading mode is "strict", |
| 3133 | * so we pack smt_mode vcpus per vcore. |
| 3134 | */ |
| 3135 | if (smt_mode > threads_per_subcore) |
| 3136 | return -EINVAL; |
| 3137 | } else { |
| 3138 | /* |
| 3139 | * On POWER9, the threading mode is "loose", |
| 3140 | * so each vcpu gets its own vcore. |
| 3141 | */ |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 3142 | esmt = smt_mode; |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 3143 | smt_mode = 1; |
| 3144 | } |
| 3145 | mutex_lock(&kvm->lock); |
| 3146 | err = -EBUSY; |
| 3147 | if (!kvm->arch.online_vcores) { |
| 3148 | kvm->arch.smt_mode = smt_mode; |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 3149 | kvm->arch.emul_smt_mode = esmt; |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 3150 | err = 0; |
| 3151 | } |
| 3152 | mutex_unlock(&kvm->lock); |
| 3153 | |
| 3154 | return err; |
| 3155 | } |
| 3156 | |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 3157 | static void unpin_vpa(struct kvm *kvm, struct kvmppc_vpa *vpa) |
| 3158 | { |
| 3159 | if (vpa->pinned_addr) |
| 3160 | kvmppc_unpin_guest_page(kvm, vpa->pinned_addr, vpa->gpa, |
| 3161 | vpa->dirty); |
| 3162 | } |
| 3163 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 3164 | static void kvmppc_core_vcpu_free_hv(struct kvm_vcpu *vcpu) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 3165 | { |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 3166 | spin_lock(&vcpu->arch.vpa_update_lock); |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 3167 | unpin_vpa(vcpu->kvm, &vcpu->arch.dtl); |
| 3168 | unpin_vpa(vcpu->kvm, &vcpu->arch.slb_shadow); |
| 3169 | unpin_vpa(vcpu->kvm, &vcpu->arch.vpa); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 3170 | spin_unlock(&vcpu->arch.vpa_update_lock); |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 3171 | if (kvmhv_is_nestedv2()) |
| 3172 | kvmhv_nestedv2_vcpu_free(vcpu, &vcpu->arch.nestedv2_io); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 3173 | } |
| 3174 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 3175 | static int kvmppc_core_check_requests_hv(struct kvm_vcpu *vcpu) |
| 3176 | { |
| 3177 | /* Indicate we want to get back into the guest */ |
| 3178 | return 1; |
| 3179 | } |
| 3180 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3181 | static void kvmppc_set_timer(struct kvm_vcpu *vcpu) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 3182 | { |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3183 | unsigned long dec_nsec, now; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3184 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3185 | now = get_tb(); |
Nicholas Piggin | 3c1a4322 | 2021-11-23 19:52:00 +1000 | [diff] [blame] | 3186 | if (now > kvmppc_dec_expires_host_tb(vcpu)) { |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3187 | /* decrementer has already gone negative */ |
| 3188 | kvmppc_core_queue_dec(vcpu); |
Scott Wood | 7e28e60e | 2011-11-08 18:23:20 -0600 | [diff] [blame] | 3189 | kvmppc_core_prepare_to_enter(vcpu); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3190 | return; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3191 | } |
Nicholas Piggin | 3c1a4322 | 2021-11-23 19:52:00 +1000 | [diff] [blame] | 3192 | dec_nsec = tb_to_ns(kvmppc_dec_expires_host_tb(vcpu) - now); |
Thomas Gleixner | 8b0e195 | 2016-12-25 12:30:41 +0100 | [diff] [blame] | 3193 | hrtimer_start(&vcpu->arch.dec_timer, dec_nsec, HRTIMER_MODE_REL); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3194 | vcpu->arch.timer_running = 1; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3195 | } |
| 3196 | |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3197 | extern int __kvmppc_vcore_entry(void); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3198 | |
| 3199 | static void kvmppc_remove_runnable(struct kvmppc_vcore *vc, |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 3200 | struct kvm_vcpu *vcpu, u64 tb) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3201 | { |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 3202 | u64 now; |
| 3203 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3204 | if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
| 3205 | return; |
Paul Mackerras | bf3d32e | 2013-11-16 17:46:04 +1100 | [diff] [blame] | 3206 | spin_lock_irq(&vcpu->arch.tbacct_lock); |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 3207 | now = tb; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 3208 | vcpu->arch.busy_stolen += vcore_stolen_time(vc, now) - |
| 3209 | vcpu->arch.stolen_logged; |
| 3210 | vcpu->arch.busy_preempt = now; |
| 3211 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; |
Paul Mackerras | bf3d32e | 2013-11-16 17:46:04 +1100 | [diff] [blame] | 3212 | spin_unlock_irq(&vcpu->arch.tbacct_lock); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3213 | --vc->n_runnable; |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 3214 | WRITE_ONCE(vc->runnable_threads[vcpu->arch.ptid], NULL); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3215 | } |
| 3216 | |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 3217 | static int kvmppc_grab_hwthread(int cpu) |
| 3218 | { |
| 3219 | struct paca_struct *tpaca; |
Paul Mackerras | b754c73 | 2014-09-02 16:14:42 +1000 | [diff] [blame] | 3220 | long timeout = 10000; |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 3221 | |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 3222 | tpaca = paca_ptrs[cpu]; |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 3223 | |
| 3224 | /* Ensure the thread won't go into the kernel if it wakes */ |
Paul Mackerras | 7b444c6 | 2012-10-15 01:16:14 +0000 | [diff] [blame] | 3225 | tpaca->kvm_hstate.kvm_vcpu = NULL; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3226 | tpaca->kvm_hstate.kvm_vcore = NULL; |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 3227 | tpaca->kvm_hstate.napping = 0; |
| 3228 | smp_wmb(); |
| 3229 | tpaca->kvm_hstate.hwthread_req = 1; |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 3230 | |
| 3231 | /* |
| 3232 | * If the thread is already executing in the kernel (e.g. handling |
| 3233 | * a stray interrupt), wait for it to get back to nap mode. |
| 3234 | * The smp_mb() is to ensure that our setting of hwthread_req |
| 3235 | * is visible before we look at hwthread_state, so if this |
| 3236 | * races with the code at system_reset_pSeries and the thread |
| 3237 | * misses our setting of hwthread_req, we are sure to see its |
| 3238 | * setting of hwthread_state, and vice versa. |
| 3239 | */ |
| 3240 | smp_mb(); |
| 3241 | while (tpaca->kvm_hstate.hwthread_state == KVM_HWTHREAD_IN_KERNEL) { |
| 3242 | if (--timeout <= 0) { |
| 3243 | pr_err("KVM: couldn't grab cpu %d\n", cpu); |
| 3244 | return -EBUSY; |
| 3245 | } |
| 3246 | udelay(1); |
| 3247 | } |
| 3248 | return 0; |
| 3249 | } |
| 3250 | |
| 3251 | static void kvmppc_release_hwthread(int cpu) |
| 3252 | { |
| 3253 | struct paca_struct *tpaca; |
| 3254 | |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 3255 | tpaca = paca_ptrs[cpu]; |
Paul Mackerras | 31a4d44 | 2017-10-19 15:14:20 +1100 | [diff] [blame] | 3256 | tpaca->kvm_hstate.hwthread_req = 0; |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 3257 | tpaca->kvm_hstate.kvm_vcpu = NULL; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3258 | tpaca->kvm_hstate.kvm_vcore = NULL; |
| 3259 | tpaca->kvm_hstate.kvm_split_mode = NULL; |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 3260 | } |
| 3261 | |
Nicholas Piggin | 434398a | 2021-11-23 19:52:27 +1000 | [diff] [blame] | 3262 | static DEFINE_PER_CPU(struct kvm *, cpu_in_guest); |
| 3263 | |
Paul Mackerras | a29ebea | 2017-01-30 21:21:50 +1100 | [diff] [blame] | 3264 | static void radix_flush_cpu(struct kvm *kvm, int cpu, struct kvm_vcpu *vcpu) |
| 3265 | { |
Suraj Jitindar Singh | 9d0b048 | 2018-10-08 16:31:11 +1100 | [diff] [blame] | 3266 | struct kvm_nested_guest *nested = vcpu->arch.nested; |
Nicholas Piggin | 434398a | 2021-11-23 19:52:27 +1000 | [diff] [blame] | 3267 | cpumask_t *need_tlb_flush; |
Paul Mackerras | a29ebea | 2017-01-30 21:21:50 +1100 | [diff] [blame] | 3268 | int i; |
| 3269 | |
Nicholas Piggin | 434398a | 2021-11-23 19:52:27 +1000 | [diff] [blame] | 3270 | if (nested) |
Nicholas Piggin | d5c0e833 | 2021-11-23 19:52:21 +1000 | [diff] [blame] | 3271 | need_tlb_flush = &nested->need_tlb_flush; |
Nicholas Piggin | 434398a | 2021-11-23 19:52:27 +1000 | [diff] [blame] | 3272 | else |
Nicholas Piggin | d5c0e833 | 2021-11-23 19:52:21 +1000 | [diff] [blame] | 3273 | need_tlb_flush = &kvm->arch.need_tlb_flush; |
Nicholas Piggin | d5c0e833 | 2021-11-23 19:52:21 +1000 | [diff] [blame] | 3274 | |
Suraj Jitindar Singh | 77bbbc0 | 2021-06-02 14:04:41 +1000 | [diff] [blame] | 3275 | cpu = cpu_first_tlb_thread_sibling(cpu); |
Suraj Jitindar Singh | 77bbbc0 | 2021-06-02 14:04:41 +1000 | [diff] [blame] | 3276 | for (i = cpu; i <= cpu_last_tlb_thread_sibling(cpu); |
| 3277 | i += cpu_tlb_thread_sibling_step()) |
Nicholas Piggin | d5c0e833 | 2021-11-23 19:52:21 +1000 | [diff] [blame] | 3278 | cpumask_set_cpu(i, need_tlb_flush); |
| 3279 | |
Paul Mackerras | a29ebea | 2017-01-30 21:21:50 +1100 | [diff] [blame] | 3280 | /* |
Nicholas Piggin | 434398a | 2021-11-23 19:52:27 +1000 | [diff] [blame] | 3281 | * Make sure setting of bit in need_tlb_flush precedes testing of |
| 3282 | * cpu_in_guest. The matching barrier on the other side is hwsync |
| 3283 | * when switching to guest MMU mode, which happens between |
| 3284 | * cpu_in_guest being set to the guest kvm, and need_tlb_flush bit |
| 3285 | * being tested. |
Paul Mackerras | a29ebea | 2017-01-30 21:21:50 +1100 | [diff] [blame] | 3286 | */ |
| 3287 | smp_mb(); |
Nicholas Piggin | d5c0e833 | 2021-11-23 19:52:21 +1000 | [diff] [blame] | 3288 | |
Suraj Jitindar Singh | 77bbbc0 | 2021-06-02 14:04:41 +1000 | [diff] [blame] | 3289 | for (i = cpu; i <= cpu_last_tlb_thread_sibling(cpu); |
Nicholas Piggin | 434398a | 2021-11-23 19:52:27 +1000 | [diff] [blame] | 3290 | i += cpu_tlb_thread_sibling_step()) { |
| 3291 | struct kvm *running = *per_cpu_ptr(&cpu_in_guest, i); |
| 3292 | |
| 3293 | if (running == kvm) |
Suraj Jitindar Singh | 77bbbc0 | 2021-06-02 14:04:41 +1000 | [diff] [blame] | 3294 | smp_call_function_single(i, do_nothing, NULL, 1); |
Nicholas Piggin | 434398a | 2021-11-23 19:52:27 +1000 | [diff] [blame] | 3295 | } |
Paul Mackerras | a29ebea | 2017-01-30 21:21:50 +1100 | [diff] [blame] | 3296 | } |
| 3297 | |
Nicholas Piggin | d5c0e833 | 2021-11-23 19:52:21 +1000 | [diff] [blame] | 3298 | static void do_migrate_away_vcpu(void *arg) |
| 3299 | { |
| 3300 | struct kvm_vcpu *vcpu = arg; |
| 3301 | struct kvm *kvm = vcpu->kvm; |
| 3302 | |
| 3303 | /* |
| 3304 | * If the guest has GTSE, it may execute tlbie, so do a eieio; tlbsync; |
| 3305 | * ptesync sequence on the old CPU before migrating to a new one, in |
| 3306 | * case we interrupted the guest between a tlbie ; eieio ; |
| 3307 | * tlbsync; ptesync sequence. |
| 3308 | * |
| 3309 | * Otherwise, ptesync is sufficient for ordering tlbiel sequences. |
| 3310 | */ |
| 3311 | if (kvm->arch.lpcr & LPCR_GTSE) |
| 3312 | asm volatile("eieio; tlbsync; ptesync"); |
| 3313 | else |
| 3314 | asm volatile("ptesync"); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3315 | } |
| 3316 | |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3317 | static void kvmppc_prepare_radix_vcpu(struct kvm_vcpu *vcpu, int pcpu) |
| 3318 | { |
Suraj Jitindar Singh | 9d0b048 | 2018-10-08 16:31:11 +1100 | [diff] [blame] | 3319 | struct kvm_nested_guest *nested = vcpu->arch.nested; |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3320 | struct kvm *kvm = vcpu->kvm; |
Suraj Jitindar Singh | 9d0b048 | 2018-10-08 16:31:11 +1100 | [diff] [blame] | 3321 | int prev_cpu; |
| 3322 | |
| 3323 | if (!cpu_has_feature(CPU_FTR_HVMODE)) |
| 3324 | return; |
| 3325 | |
| 3326 | if (nested) |
| 3327 | prev_cpu = nested->prev_cpu[vcpu->arch.nested_vcpu_id]; |
| 3328 | else |
| 3329 | prev_cpu = vcpu->arch.prev_cpu; |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3330 | |
| 3331 | /* |
| 3332 | * With radix, the guest can do TLB invalidations itself, |
| 3333 | * and it could choose to use the local form (tlbiel) if |
| 3334 | * it is invalidating a translation that has only ever been |
| 3335 | * used on one vcpu. However, that doesn't mean it has |
| 3336 | * only ever been used on one physical cpu, since vcpus |
| 3337 | * can move around between pcpus. To cope with this, when |
| 3338 | * a vcpu moves from one pcpu to another, we need to tell |
| 3339 | * any vcpus running on the same core as this vcpu previously |
Nicholas Piggin | d5c0e833 | 2021-11-23 19:52:21 +1000 | [diff] [blame] | 3340 | * ran to flush the TLB. |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3341 | */ |
Suraj Jitindar Singh | 9d0b048 | 2018-10-08 16:31:11 +1100 | [diff] [blame] | 3342 | if (prev_cpu != pcpu) { |
Nicholas Piggin | d5c0e833 | 2021-11-23 19:52:21 +1000 | [diff] [blame] | 3343 | if (prev_cpu >= 0) { |
| 3344 | if (cpu_first_tlb_thread_sibling(prev_cpu) != |
| 3345 | cpu_first_tlb_thread_sibling(pcpu)) |
| 3346 | radix_flush_cpu(kvm, prev_cpu, vcpu); |
| 3347 | |
| 3348 | smp_call_function_single(prev_cpu, |
| 3349 | do_migrate_away_vcpu, vcpu, 1); |
| 3350 | } |
Suraj Jitindar Singh | 9d0b048 | 2018-10-08 16:31:11 +1100 | [diff] [blame] | 3351 | if (nested) |
| 3352 | nested->prev_cpu[vcpu->arch.nested_vcpu_id] = pcpu; |
| 3353 | else |
| 3354 | vcpu->arch.prev_cpu = pcpu; |
| 3355 | } |
| 3356 | } |
| 3357 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3358 | static void kvmppc_start_thread(struct kvm_vcpu *vcpu, struct kvmppc_vcore *vc) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3359 | { |
| 3360 | int cpu; |
| 3361 | struct paca_struct *tpaca; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3362 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3363 | cpu = vc->pcpu; |
| 3364 | if (vcpu) { |
| 3365 | if (vcpu->arch.timer_running) { |
| 3366 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); |
| 3367 | vcpu->arch.timer_running = 0; |
| 3368 | } |
| 3369 | cpu += vcpu->arch.ptid; |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 3370 | vcpu->cpu = vc->pcpu; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3371 | vcpu->arch.thread_cpu = cpu; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3372 | } |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 3373 | tpaca = paca_ptrs[cpu]; |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 3374 | tpaca->kvm_hstate.kvm_vcpu = vcpu; |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 3375 | tpaca->kvm_hstate.ptid = cpu - vc->pcpu; |
Paul Mackerras | 4bb3c7a | 2018-03-21 21:32:01 +1100 | [diff] [blame] | 3376 | tpaca->kvm_hstate.fake_suspend = 0; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3377 | /* Order stores to hstate.kvm_vcpu etc. before store to kvm_vcore */ |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3378 | smp_wmb(); |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 3379 | tpaca->kvm_hstate.kvm_vcore = vc; |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 3380 | if (cpu != smp_processor_id()) |
Paul Mackerras | 66feed6 | 2015-03-28 14:21:12 +1100 | [diff] [blame] | 3381 | kvmppc_ipi_thread(cpu); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3382 | } |
| 3383 | |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 3384 | static void kvmppc_wait_for_nap(int n_threads) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3385 | { |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 3386 | int cpu = smp_processor_id(); |
| 3387 | int i, loops; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3388 | |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 3389 | if (n_threads <= 1) |
| 3390 | return; |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 3391 | for (loops = 0; loops < 1000000; ++loops) { |
| 3392 | /* |
| 3393 | * Check if all threads are finished. |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3394 | * We set the vcore pointer when starting a thread |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 3395 | * and the thread clears it when finished, so we look |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3396 | * for any threads that still have a non-NULL vcore ptr. |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 3397 | */ |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 3398 | for (i = 1; i < n_threads; ++i) |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 3399 | if (paca_ptrs[cpu + i]->kvm_hstate.kvm_vcore) |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 3400 | break; |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 3401 | if (i == n_threads) { |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 3402 | HMT_medium(); |
| 3403 | return; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3404 | } |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 3405 | HMT_low(); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3406 | } |
| 3407 | HMT_medium(); |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 3408 | for (i = 1; i < n_threads; ++i) |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 3409 | if (paca_ptrs[cpu + i]->kvm_hstate.kvm_vcore) |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 3410 | pr_err("KVM: CPU %d seems to be stuck\n", cpu + i); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3411 | } |
| 3412 | |
| 3413 | /* |
| 3414 | * Check that we are on thread 0 and that any other threads in |
Paul Mackerras | 7b444c6 | 2012-10-15 01:16:14 +0000 | [diff] [blame] | 3415 | * this core are off-line. Then grab the threads so they can't |
| 3416 | * enter the kernel. |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3417 | */ |
| 3418 | static int on_primary_thread(void) |
| 3419 | { |
| 3420 | int cpu = smp_processor_id(); |
Michael Ellerman | 3102f78 | 2014-05-23 18:15:29 +1000 | [diff] [blame] | 3421 | int thr; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3422 | |
Michael Ellerman | 3102f78 | 2014-05-23 18:15:29 +1000 | [diff] [blame] | 3423 | /* Are we on a primary subcore? */ |
| 3424 | if (cpu_thread_in_subcore(cpu)) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3425 | return 0; |
Michael Ellerman | 3102f78 | 2014-05-23 18:15:29 +1000 | [diff] [blame] | 3426 | |
| 3427 | thr = 0; |
| 3428 | while (++thr < threads_per_subcore) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3429 | if (cpu_online(cpu + thr)) |
| 3430 | return 0; |
Paul Mackerras | 7b444c6 | 2012-10-15 01:16:14 +0000 | [diff] [blame] | 3431 | |
| 3432 | /* Grab all hw threads so they can't go into the kernel */ |
Michael Ellerman | 3102f78 | 2014-05-23 18:15:29 +1000 | [diff] [blame] | 3433 | for (thr = 1; thr < threads_per_subcore; ++thr) { |
Paul Mackerras | 7b444c6 | 2012-10-15 01:16:14 +0000 | [diff] [blame] | 3434 | if (kvmppc_grab_hwthread(cpu + thr)) { |
| 3435 | /* Couldn't grab one; let the others go */ |
| 3436 | do { |
| 3437 | kvmppc_release_hwthread(cpu + thr); |
| 3438 | } while (--thr > 0); |
| 3439 | return 0; |
| 3440 | } |
| 3441 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3442 | return 1; |
| 3443 | } |
| 3444 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3445 | /* |
| 3446 | * A list of virtual cores for each physical CPU. |
| 3447 | * These are vcores that could run but their runner VCPU tasks are |
| 3448 | * (or may be) preempted. |
| 3449 | */ |
| 3450 | struct preempted_vcore_list { |
| 3451 | struct list_head list; |
| 3452 | spinlock_t lock; |
| 3453 | }; |
| 3454 | |
| 3455 | static DEFINE_PER_CPU(struct preempted_vcore_list, preempted_vcores); |
| 3456 | |
| 3457 | static void init_vcore_lists(void) |
| 3458 | { |
| 3459 | int cpu; |
| 3460 | |
| 3461 | for_each_possible_cpu(cpu) { |
| 3462 | struct preempted_vcore_list *lp = &per_cpu(preempted_vcores, cpu); |
| 3463 | spin_lock_init(&lp->lock); |
| 3464 | INIT_LIST_HEAD(&lp->list); |
| 3465 | } |
| 3466 | } |
| 3467 | |
| 3468 | static void kvmppc_vcore_preempt(struct kvmppc_vcore *vc) |
| 3469 | { |
| 3470 | struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores); |
| 3471 | |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 3472 | WARN_ON_ONCE(cpu_has_feature(CPU_FTR_ARCH_300)); |
| 3473 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3474 | vc->vcore_state = VCORE_PREEMPT; |
| 3475 | vc->pcpu = smp_processor_id(); |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 3476 | if (vc->num_threads < threads_per_vcore(vc->kvm)) { |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3477 | spin_lock(&lp->lock); |
| 3478 | list_add_tail(&vc->preempt_list, &lp->list); |
| 3479 | spin_unlock(&lp->lock); |
| 3480 | } |
| 3481 | |
| 3482 | /* Start accumulating stolen time */ |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 3483 | kvmppc_core_start_stolen(vc, mftb()); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3484 | } |
| 3485 | |
| 3486 | static void kvmppc_vcore_end_preempt(struct kvmppc_vcore *vc) |
| 3487 | { |
Paul Mackerras | 402813f | 2015-07-16 17:11:13 +1000 | [diff] [blame] | 3488 | struct preempted_vcore_list *lp; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3489 | |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 3490 | WARN_ON_ONCE(cpu_has_feature(CPU_FTR_ARCH_300)); |
| 3491 | |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 3492 | kvmppc_core_end_stolen(vc, mftb()); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3493 | if (!list_empty(&vc->preempt_list)) { |
Paul Mackerras | 402813f | 2015-07-16 17:11:13 +1000 | [diff] [blame] | 3494 | lp = &per_cpu(preempted_vcores, vc->pcpu); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3495 | spin_lock(&lp->lock); |
| 3496 | list_del_init(&vc->preempt_list); |
| 3497 | spin_unlock(&lp->lock); |
| 3498 | } |
| 3499 | vc->vcore_state = VCORE_INACTIVE; |
| 3500 | } |
| 3501 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3502 | /* |
| 3503 | * This stores information about the virtual cores currently |
| 3504 | * assigned to a physical core. |
| 3505 | */ |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3506 | struct core_info { |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3507 | int n_subcores; |
| 3508 | int max_subcore_threads; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3509 | int total_threads; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3510 | int subcore_threads[MAX_SUBCORES]; |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 3511 | struct kvmppc_vcore *vc[MAX_SUBCORES]; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3512 | }; |
| 3513 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3514 | /* |
| 3515 | * This mapping means subcores 0 and 1 can use threads 0-3 and 4-7 |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 3516 | * respectively in 2-way micro-threading (split-core) mode on POWER8. |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3517 | */ |
| 3518 | static int subcore_thread_map[MAX_SUBCORES] = { 0, 4, 2, 6 }; |
| 3519 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3520 | static void init_core_info(struct core_info *cip, struct kvmppc_vcore *vc) |
| 3521 | { |
| 3522 | memset(cip, 0, sizeof(*cip)); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3523 | cip->n_subcores = 1; |
| 3524 | cip->max_subcore_threads = vc->num_threads; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3525 | cip->total_threads = vc->num_threads; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3526 | cip->subcore_threads[0] = vc->num_threads; |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 3527 | cip->vc[0] = vc; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3528 | } |
| 3529 | |
| 3530 | static bool subcore_config_ok(int n_subcores, int n_threads) |
| 3531 | { |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 3532 | /* |
Paul Mackerras | 00608e1 | 2018-01-11 16:54:26 +1100 | [diff] [blame] | 3533 | * POWER9 "SMT4" cores are permanently in what is effectively a 4-way |
| 3534 | * split-core mode, with one thread per subcore. |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 3535 | */ |
| 3536 | if (cpu_has_feature(CPU_FTR_ARCH_300)) |
| 3537 | return n_subcores <= 4 && n_threads == 1; |
| 3538 | |
| 3539 | /* On POWER8, can only dynamically split if unsplit to begin with */ |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3540 | if (n_subcores > 1 && threads_per_subcore < MAX_SMT_THREADS) |
| 3541 | return false; |
| 3542 | if (n_subcores > MAX_SUBCORES) |
| 3543 | return false; |
| 3544 | if (n_subcores > 1) { |
| 3545 | if (!(dynamic_mt_modes & 2)) |
| 3546 | n_subcores = 4; |
| 3547 | if (n_subcores > 2 && !(dynamic_mt_modes & 4)) |
| 3548 | return false; |
| 3549 | } |
| 3550 | |
| 3551 | return n_subcores * roundup_pow_of_two(n_threads) <= MAX_SMT_THREADS; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3552 | } |
| 3553 | |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 3554 | static void init_vcore_to_run(struct kvmppc_vcore *vc) |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3555 | { |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3556 | vc->entry_exit_map = 0; |
| 3557 | vc->in_guest = 0; |
| 3558 | vc->napping_threads = 0; |
| 3559 | vc->conferring_threads = 0; |
Paul Mackerras | 57b8daa | 2018-04-20 22:51:11 +1000 | [diff] [blame] | 3560 | vc->tb_offset_applied = 0; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3561 | } |
| 3562 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3563 | static bool can_dynamic_split(struct kvmppc_vcore *vc, struct core_info *cip) |
| 3564 | { |
| 3565 | int n_threads = vc->num_threads; |
| 3566 | int sub; |
| 3567 | |
| 3568 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) |
| 3569 | return false; |
| 3570 | |
Paul Mackerras | aa22786 | 2018-09-12 10:42:12 +1000 | [diff] [blame] | 3571 | /* In one_vm_per_core mode, require all vcores to be from the same vm */ |
| 3572 | if (one_vm_per_core && vc->kvm != cip->vc[0]->kvm) |
| 3573 | return false; |
| 3574 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3575 | if (n_threads < cip->max_subcore_threads) |
| 3576 | n_threads = cip->max_subcore_threads; |
Paul Mackerras | b009031 | 2016-09-15 16:27:41 +1000 | [diff] [blame] | 3577 | if (!subcore_config_ok(cip->n_subcores + 1, n_threads)) |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3578 | return false; |
Paul Mackerras | b009031 | 2016-09-15 16:27:41 +1000 | [diff] [blame] | 3579 | cip->max_subcore_threads = n_threads; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3580 | |
| 3581 | sub = cip->n_subcores; |
| 3582 | ++cip->n_subcores; |
| 3583 | cip->total_threads += vc->num_threads; |
| 3584 | cip->subcore_threads[sub] = vc->num_threads; |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 3585 | cip->vc[sub] = vc; |
| 3586 | init_vcore_to_run(vc); |
| 3587 | list_del_init(&vc->preempt_list); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3588 | |
| 3589 | return true; |
| 3590 | } |
| 3591 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3592 | /* |
| 3593 | * Work out whether it is possible to piggyback the execution of |
| 3594 | * vcore *pvc onto the execution of the other vcores described in *cip. |
| 3595 | */ |
| 3596 | static bool can_piggyback(struct kvmppc_vcore *pvc, struct core_info *cip, |
| 3597 | int target_threads) |
| 3598 | { |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3599 | if (cip->total_threads + pvc->num_threads > target_threads) |
| 3600 | return false; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3601 | |
Paul Mackerras | b009031 | 2016-09-15 16:27:41 +1000 | [diff] [blame] | 3602 | return can_dynamic_split(pvc, cip); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3603 | } |
| 3604 | |
Paul Mackerras | d911f0b | 2015-03-28 14:21:03 +1100 | [diff] [blame] | 3605 | static void prepare_threads(struct kvmppc_vcore *vc) |
| 3606 | { |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 3607 | int i; |
| 3608 | struct kvm_vcpu *vcpu; |
Paul Mackerras | d911f0b | 2015-03-28 14:21:03 +1100 | [diff] [blame] | 3609 | |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 3610 | for_each_runnable_thread(i, vcpu, vc) { |
Paul Mackerras | d911f0b | 2015-03-28 14:21:03 +1100 | [diff] [blame] | 3611 | if (signal_pending(vcpu->arch.run_task)) |
| 3612 | vcpu->arch.ret = -EINTR; |
| 3613 | else if (vcpu->arch.vpa.update_pending || |
| 3614 | vcpu->arch.slb_shadow.update_pending || |
| 3615 | vcpu->arch.dtl.update_pending) |
| 3616 | vcpu->arch.ret = RESUME_GUEST; |
| 3617 | else |
| 3618 | continue; |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 3619 | kvmppc_remove_runnable(vc, vcpu, mftb()); |
Paul Mackerras | d911f0b | 2015-03-28 14:21:03 +1100 | [diff] [blame] | 3620 | wake_up(&vcpu->arch.cpu_run); |
| 3621 | } |
| 3622 | } |
| 3623 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3624 | static void collect_piggybacks(struct core_info *cip, int target_threads) |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 3625 | { |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3626 | struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores); |
| 3627 | struct kvmppc_vcore *pvc, *vcnext; |
| 3628 | |
| 3629 | spin_lock(&lp->lock); |
| 3630 | list_for_each_entry_safe(pvc, vcnext, &lp->list, preempt_list) { |
| 3631 | if (!spin_trylock(&pvc->lock)) |
| 3632 | continue; |
| 3633 | prepare_threads(pvc); |
Paul Mackerras | d28eafc | 2019-08-27 11:31:37 +1000 | [diff] [blame] | 3634 | if (!pvc->n_runnable || !pvc->kvm->arch.mmu_ready) { |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3635 | list_del_init(&pvc->preempt_list); |
| 3636 | if (pvc->runner == NULL) { |
| 3637 | pvc->vcore_state = VCORE_INACTIVE; |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 3638 | kvmppc_core_end_stolen(pvc, mftb()); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3639 | } |
| 3640 | spin_unlock(&pvc->lock); |
| 3641 | continue; |
| 3642 | } |
| 3643 | if (!can_piggyback(pvc, cip, target_threads)) { |
| 3644 | spin_unlock(&pvc->lock); |
| 3645 | continue; |
| 3646 | } |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 3647 | kvmppc_core_end_stolen(pvc, mftb()); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3648 | pvc->vcore_state = VCORE_PIGGYBACK; |
| 3649 | if (cip->total_threads >= target_threads) |
| 3650 | break; |
| 3651 | } |
| 3652 | spin_unlock(&lp->lock); |
| 3653 | } |
| 3654 | |
Paul Mackerras | d28eafc | 2019-08-27 11:31:37 +1000 | [diff] [blame] | 3655 | static bool recheck_signals_and_mmu(struct core_info *cip) |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3656 | { |
| 3657 | int sub, i; |
| 3658 | struct kvm_vcpu *vcpu; |
Paul Mackerras | d28eafc | 2019-08-27 11:31:37 +1000 | [diff] [blame] | 3659 | struct kvmppc_vcore *vc; |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3660 | |
Paul Mackerras | d28eafc | 2019-08-27 11:31:37 +1000 | [diff] [blame] | 3661 | for (sub = 0; sub < cip->n_subcores; ++sub) { |
| 3662 | vc = cip->vc[sub]; |
| 3663 | if (!vc->kvm->arch.mmu_ready) |
| 3664 | return true; |
| 3665 | for_each_runnable_thread(i, vcpu, vc) |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3666 | if (signal_pending(vcpu->arch.run_task)) |
| 3667 | return true; |
Paul Mackerras | d28eafc | 2019-08-27 11:31:37 +1000 | [diff] [blame] | 3668 | } |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3669 | return false; |
| 3670 | } |
| 3671 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3672 | static void post_guest_process(struct kvmppc_vcore *vc, bool is_master) |
| 3673 | { |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 3674 | int still_running = 0, i; |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 3675 | u64 now; |
| 3676 | long ret; |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 3677 | struct kvm_vcpu *vcpu; |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 3678 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3679 | spin_lock(&vc->lock); |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 3680 | now = get_tb(); |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 3681 | for_each_runnable_thread(i, vcpu, vc) { |
Paul Mackerras | 53655dd | 2018-10-08 16:30:54 +1100 | [diff] [blame] | 3682 | /* |
| 3683 | * It's safe to unlock the vcore in the loop here, because |
| 3684 | * for_each_runnable_thread() is safe against removal of |
| 3685 | * the vcpu, and the vcore state is VCORE_EXITING here, |
| 3686 | * so any vcpus becoming runnable will have their arch.trap |
| 3687 | * set to zero and can't actually run in the guest. |
| 3688 | */ |
| 3689 | spin_unlock(&vc->lock); |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 3690 | /* cancel pending dec exception if dec is positive */ |
Nicholas Piggin | 3c1a4322 | 2021-11-23 19:52:00 +1000 | [diff] [blame] | 3691 | if (now < kvmppc_dec_expires_host_tb(vcpu) && |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 3692 | kvmppc_core_pending_dec(vcpu)) |
| 3693 | kvmppc_core_dequeue_dec(vcpu); |
| 3694 | |
| 3695 | trace_kvm_guest_exit(vcpu); |
| 3696 | |
| 3697 | ret = RESUME_GUEST; |
| 3698 | if (vcpu->arch.trap) |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 3699 | ret = kvmppc_handle_exit_hv(vcpu, |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 3700 | vcpu->arch.run_task); |
| 3701 | |
| 3702 | vcpu->arch.ret = ret; |
| 3703 | vcpu->arch.trap = 0; |
| 3704 | |
Paul Mackerras | 53655dd | 2018-10-08 16:30:54 +1100 | [diff] [blame] | 3705 | spin_lock(&vc->lock); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3706 | if (is_kvmppc_resume_guest(vcpu->arch.ret)) { |
| 3707 | if (vcpu->arch.pending_exceptions) |
| 3708 | kvmppc_core_prepare_to_enter(vcpu); |
| 3709 | if (vcpu->arch.ceded) |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 3710 | kvmppc_set_timer(vcpu); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3711 | else |
| 3712 | ++still_running; |
| 3713 | } else { |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 3714 | kvmppc_remove_runnable(vc, vcpu, mftb()); |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 3715 | wake_up(&vcpu->arch.cpu_run); |
| 3716 | } |
| 3717 | } |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3718 | if (!is_master) { |
Paul Mackerras | 563a1e9 | 2015-07-16 17:11:14 +1000 | [diff] [blame] | 3719 | if (still_running > 0) { |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3720 | kvmppc_vcore_preempt(vc); |
Paul Mackerras | 563a1e9 | 2015-07-16 17:11:14 +1000 | [diff] [blame] | 3721 | } else if (vc->runner) { |
| 3722 | vc->vcore_state = VCORE_PREEMPT; |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 3723 | kvmppc_core_start_stolen(vc, mftb()); |
Paul Mackerras | 563a1e9 | 2015-07-16 17:11:14 +1000 | [diff] [blame] | 3724 | } else { |
| 3725 | vc->vcore_state = VCORE_INACTIVE; |
| 3726 | } |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3727 | if (vc->n_runnable > 0 && vc->runner == NULL) { |
| 3728 | /* make sure there's a candidate runner awake */ |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 3729 | i = -1; |
| 3730 | vcpu = next_runnable_thread(vc, &i); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3731 | wake_up(&vcpu->arch.cpu_run); |
| 3732 | } |
| 3733 | } |
| 3734 | spin_unlock(&vc->lock); |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 3735 | } |
| 3736 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3737 | /* |
Suresh Warrier | b8e6a87 | 2015-12-17 14:59:07 -0600 | [diff] [blame] | 3738 | * Clear core from the list of active host cores as we are about to |
| 3739 | * enter the guest. Only do this if it is the primary thread of the |
| 3740 | * core (not if a subcore) that is entering the guest. |
| 3741 | */ |
Anna-Maria Gleixner | 3f7cd91 | 2016-11-27 00:13:45 +0100 | [diff] [blame] | 3742 | static inline int kvmppc_clear_host_core(unsigned int cpu) |
Suresh Warrier | b8e6a87 | 2015-12-17 14:59:07 -0600 | [diff] [blame] | 3743 | { |
| 3744 | int core; |
| 3745 | |
| 3746 | if (!kvmppc_host_rm_ops_hv || cpu_thread_in_core(cpu)) |
Anna-Maria Gleixner | 3f7cd91 | 2016-11-27 00:13:45 +0100 | [diff] [blame] | 3747 | return 0; |
Suresh Warrier | b8e6a87 | 2015-12-17 14:59:07 -0600 | [diff] [blame] | 3748 | /* |
| 3749 | * Memory barrier can be omitted here as we will do a smp_wmb() |
| 3750 | * later in kvmppc_start_thread and we need ensure that state is |
| 3751 | * visible to other CPUs only after we enter guest. |
| 3752 | */ |
| 3753 | core = cpu >> threads_shift; |
| 3754 | kvmppc_host_rm_ops_hv->rm_core[core].rm_state.in_host = 0; |
Anna-Maria Gleixner | 3f7cd91 | 2016-11-27 00:13:45 +0100 | [diff] [blame] | 3755 | return 0; |
Suresh Warrier | b8e6a87 | 2015-12-17 14:59:07 -0600 | [diff] [blame] | 3756 | } |
| 3757 | |
| 3758 | /* |
| 3759 | * Advertise this core as an active host core since we exited the guest |
| 3760 | * Only need to do this if it is the primary thread of the core that is |
| 3761 | * exiting. |
| 3762 | */ |
Anna-Maria Gleixner | 3f7cd91 | 2016-11-27 00:13:45 +0100 | [diff] [blame] | 3763 | static inline int kvmppc_set_host_core(unsigned int cpu) |
Suresh Warrier | b8e6a87 | 2015-12-17 14:59:07 -0600 | [diff] [blame] | 3764 | { |
| 3765 | int core; |
| 3766 | |
| 3767 | if (!kvmppc_host_rm_ops_hv || cpu_thread_in_core(cpu)) |
Anna-Maria Gleixner | 3f7cd91 | 2016-11-27 00:13:45 +0100 | [diff] [blame] | 3768 | return 0; |
Suresh Warrier | b8e6a87 | 2015-12-17 14:59:07 -0600 | [diff] [blame] | 3769 | |
| 3770 | /* |
| 3771 | * Memory barrier can be omitted here because we do a spin_unlock |
| 3772 | * immediately after this which provides the memory barrier. |
| 3773 | */ |
| 3774 | core = cpu >> threads_shift; |
| 3775 | kvmppc_host_rm_ops_hv->rm_core[core].rm_state.in_host = 1; |
Anna-Maria Gleixner | 3f7cd91 | 2016-11-27 00:13:45 +0100 | [diff] [blame] | 3776 | return 0; |
Suresh Warrier | b8e6a87 | 2015-12-17 14:59:07 -0600 | [diff] [blame] | 3777 | } |
| 3778 | |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3779 | static void set_irq_happened(int trap) |
| 3780 | { |
| 3781 | switch (trap) { |
| 3782 | case BOOK3S_INTERRUPT_EXTERNAL: |
| 3783 | local_paca->irq_happened |= PACA_IRQ_EE; |
| 3784 | break; |
| 3785 | case BOOK3S_INTERRUPT_H_DOORBELL: |
| 3786 | local_paca->irq_happened |= PACA_IRQ_DBELL; |
| 3787 | break; |
| 3788 | case BOOK3S_INTERRUPT_HMI: |
| 3789 | local_paca->irq_happened |= PACA_IRQ_HMI; |
| 3790 | break; |
Nicholas Piggin | 6de6638 | 2017-11-05 23:33:55 +1100 | [diff] [blame] | 3791 | case BOOK3S_INTERRUPT_SYSTEM_RESET: |
| 3792 | replay_system_reset(); |
| 3793 | break; |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3794 | } |
| 3795 | } |
| 3796 | |
Suresh Warrier | b8e6a87 | 2015-12-17 14:59:07 -0600 | [diff] [blame] | 3797 | /* |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3798 | * Run a set of guest threads on a physical core. |
| 3799 | * Called with vc->lock held. |
| 3800 | */ |
Paul Mackerras | 66feed6 | 2015-03-28 14:21:12 +1100 | [diff] [blame] | 3801 | static noinline void kvmppc_run_core(struct kvmppc_vcore *vc) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3802 | { |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 3803 | struct kvm_vcpu *vcpu; |
Paul Mackerras | d911f0b | 2015-03-28 14:21:03 +1100 | [diff] [blame] | 3804 | int i; |
Paul Mackerras | 2c9097e4 | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 3805 | int srcu_idx; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3806 | struct core_info core_info; |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 3807 | struct kvmppc_vcore *pvc; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3808 | struct kvm_split_mode split_info, *sip; |
| 3809 | int split, subcore_size, active; |
| 3810 | int sub; |
| 3811 | bool thr0_done; |
| 3812 | unsigned long cmd_bit, stat_bit; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3813 | int pcpu, thr; |
| 3814 | int target_threads; |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 3815 | int controlled_threads; |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3816 | int trap; |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 3817 | bool is_power8; |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 3818 | |
Nicholas Piggin | fae5c9f | 2021-05-28 19:07:52 +1000 | [diff] [blame] | 3819 | if (WARN_ON_ONCE(cpu_has_feature(CPU_FTR_ARCH_300))) |
| 3820 | return; |
| 3821 | |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 3822 | /* |
Paul Mackerras | d911f0b | 2015-03-28 14:21:03 +1100 | [diff] [blame] | 3823 | * Remove from the list any threads that have a signal pending |
| 3824 | * or need a VPA update done |
| 3825 | */ |
| 3826 | prepare_threads(vc); |
| 3827 | |
| 3828 | /* if the runner is no longer runnable, let the caller pick a new one */ |
| 3829 | if (vc->runner->arch.state != KVMPPC_VCPU_RUNNABLE) |
| 3830 | return; |
| 3831 | |
| 3832 | /* |
| 3833 | * Initialize *vc. |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 3834 | */ |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 3835 | init_vcore_to_run(vc); |
Paul Mackerras | 2711e24 | 2014-12-04 16:43:28 +1100 | [diff] [blame] | 3836 | vc->preempt_tb = TB_NIL; |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 3837 | |
| 3838 | /* |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 3839 | * Number of threads that we will be controlling: the same as |
| 3840 | * the number of threads per subcore, except on POWER9, |
| 3841 | * where it's 1 because the threads are (mostly) independent. |
| 3842 | */ |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 3843 | controlled_threads = threads_per_vcore(vc->kvm); |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 3844 | |
| 3845 | /* |
Michael Ellerman | 3102f78 | 2014-05-23 18:15:29 +1000 | [diff] [blame] | 3846 | * Make sure we are running on primary threads, and that secondary |
| 3847 | * threads are offline. Also check if the number of threads in this |
| 3848 | * guest are greater than the current system threads per guest. |
Paul Mackerras | 7b444c6 | 2012-10-15 01:16:14 +0000 | [diff] [blame] | 3849 | */ |
Nicholas Piggin | b1b1697 | 2021-01-18 16:28:06 +1000 | [diff] [blame] | 3850 | if ((controlled_threads > 1) && |
| 3851 | ((vc->num_threads > threads_per_subcore) || !on_primary_thread())) { |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 3852 | for_each_runnable_thread(i, vcpu, vc) { |
Paul Mackerras | 7b444c6 | 2012-10-15 01:16:14 +0000 | [diff] [blame] | 3853 | vcpu->arch.ret = -EBUSY; |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 3854 | kvmppc_remove_runnable(vc, vcpu, mftb()); |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 3855 | wake_up(&vcpu->arch.cpu_run); |
| 3856 | } |
Paul Mackerras | 7b444c6 | 2012-10-15 01:16:14 +0000 | [diff] [blame] | 3857 | goto out; |
| 3858 | } |
| 3859 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3860 | /* |
| 3861 | * See if we could run any other vcores on the physical core |
| 3862 | * along with this one. |
| 3863 | */ |
| 3864 | init_core_info(&core_info, vc); |
| 3865 | pcpu = smp_processor_id(); |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 3866 | target_threads = controlled_threads; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3867 | if (target_smt_mode && target_smt_mode < target_threads) |
| 3868 | target_threads = target_smt_mode; |
| 3869 | if (vc->num_threads < target_threads) |
| 3870 | collect_piggybacks(&core_info, target_threads); |
Michael Ellerman | 3102f78 | 2014-05-23 18:15:29 +1000 | [diff] [blame] | 3871 | |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3872 | /* |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3873 | * Hard-disable interrupts, and check resched flag and signals. |
| 3874 | * If we need to reschedule or deliver a signal, clean up |
| 3875 | * and return without going into the guest(s). |
Paul Mackerras | 072df81 | 2017-11-09 14:30:24 +1100 | [diff] [blame] | 3876 | * If the mmu_ready flag has been cleared, don't go into the |
Paul Mackerras | 38c53af | 2017-11-08 14:44:04 +1100 | [diff] [blame] | 3877 | * guest because that means a HPT resize operation is in progress. |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3878 | */ |
| 3879 | local_irq_disable(); |
| 3880 | hard_irq_disable(); |
| 3881 | if (lazy_irq_pending() || need_resched() || |
Paul Mackerras | d28eafc | 2019-08-27 11:31:37 +1000 | [diff] [blame] | 3882 | recheck_signals_and_mmu(&core_info)) { |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3883 | local_irq_enable(); |
| 3884 | vc->vcore_state = VCORE_INACTIVE; |
| 3885 | /* Unlock all except the primary vcore */ |
| 3886 | for (sub = 1; sub < core_info.n_subcores; ++sub) { |
| 3887 | pvc = core_info.vc[sub]; |
| 3888 | /* Put back on to the preempted vcores list */ |
| 3889 | kvmppc_vcore_preempt(pvc); |
| 3890 | spin_unlock(&pvc->lock); |
| 3891 | } |
| 3892 | for (i = 0; i < controlled_threads; ++i) |
| 3893 | kvmppc_release_hwthread(pcpu + i); |
| 3894 | return; |
| 3895 | } |
| 3896 | |
| 3897 | kvmppc_clear_host_core(pcpu); |
| 3898 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3899 | /* Decide on micro-threading (split-core) mode */ |
| 3900 | subcore_size = threads_per_subcore; |
| 3901 | cmd_bit = stat_bit = 0; |
| 3902 | split = core_info.n_subcores; |
| 3903 | sip = NULL; |
Nicholas Piggin | fae5c9f | 2021-05-28 19:07:52 +1000 | [diff] [blame] | 3904 | is_power8 = cpu_has_feature(CPU_FTR_ARCH_207S); |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 3905 | |
Nicholas Piggin | b1b1697 | 2021-01-18 16:28:06 +1000 | [diff] [blame] | 3906 | if (split > 1) { |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3907 | sip = &split_info; |
| 3908 | memset(&split_info, 0, sizeof(split_info)); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3909 | for (sub = 0; sub < core_info.n_subcores; ++sub) |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 3910 | split_info.vc[sub] = core_info.vc[sub]; |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 3911 | |
| 3912 | if (is_power8) { |
| 3913 | if (split == 2 && (dynamic_mt_modes & 2)) { |
| 3914 | cmd_bit = HID0_POWER8_1TO2LPAR; |
| 3915 | stat_bit = HID0_POWER8_2LPARMODE; |
| 3916 | } else { |
| 3917 | split = 4; |
| 3918 | cmd_bit = HID0_POWER8_1TO4LPAR; |
| 3919 | stat_bit = HID0_POWER8_4LPARMODE; |
| 3920 | } |
| 3921 | subcore_size = MAX_SMT_THREADS / split; |
| 3922 | split_info.rpr = mfspr(SPRN_RPR); |
| 3923 | split_info.pmmar = mfspr(SPRN_PMMAR); |
| 3924 | split_info.ldbar = mfspr(SPRN_LDBAR); |
| 3925 | split_info.subcore_size = subcore_size; |
| 3926 | } else { |
| 3927 | split_info.subcore_size = 1; |
| 3928 | } |
| 3929 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3930 | /* order writes to split_info before kvm_split_mode pointer */ |
| 3931 | smp_wmb(); |
| 3932 | } |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3933 | |
Paul Mackerras | c010150 | 2017-10-19 14:11:23 +1100 | [diff] [blame] | 3934 | for (thr = 0; thr < controlled_threads; ++thr) { |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 3935 | struct paca_struct *paca = paca_ptrs[pcpu + thr]; |
| 3936 | |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 3937 | paca->kvm_hstate.napping = 0; |
| 3938 | paca->kvm_hstate.kvm_split_mode = sip; |
Paul Mackerras | c010150 | 2017-10-19 14:11:23 +1100 | [diff] [blame] | 3939 | } |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3940 | |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 3941 | /* Initiate micro-threading (split-core) on POWER8 if required */ |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3942 | if (cmd_bit) { |
| 3943 | unsigned long hid0 = mfspr(SPRN_HID0); |
| 3944 | |
| 3945 | hid0 |= cmd_bit | HID0_POWER8_DYNLPARDIS; |
| 3946 | mb(); |
| 3947 | mtspr(SPRN_HID0, hid0); |
| 3948 | isync(); |
| 3949 | for (;;) { |
| 3950 | hid0 = mfspr(SPRN_HID0); |
| 3951 | if (hid0 & stat_bit) |
| 3952 | break; |
| 3953 | cpu_relax(); |
| 3954 | } |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 3955 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3956 | |
Paul Mackerras | 7aa1584 | 2018-04-20 19:53:22 +1000 | [diff] [blame] | 3957 | /* |
| 3958 | * On POWER8, set RWMR register. |
| 3959 | * Since it only affects PURR and SPURR, it doesn't affect |
| 3960 | * the host, so we don't save/restore the host value. |
| 3961 | */ |
| 3962 | if (is_power8) { |
| 3963 | unsigned long rwmr_val = RWMR_RPA_P8_8THREAD; |
| 3964 | int n_online = atomic_read(&vc->online_count); |
| 3965 | |
| 3966 | /* |
| 3967 | * Use the 8-thread value if we're doing split-core |
| 3968 | * or if the vcore's online count looks bogus. |
| 3969 | */ |
| 3970 | if (split == 1 && threads_per_subcore == MAX_SMT_THREADS && |
| 3971 | n_online >= 1 && n_online <= MAX_SMT_THREADS) |
| 3972 | rwmr_val = p8_rwmr_values[n_online]; |
| 3973 | mtspr(SPRN_RWMR, rwmr_val); |
| 3974 | } |
| 3975 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3976 | /* Start all the threads */ |
| 3977 | active = 0; |
| 3978 | for (sub = 0; sub < core_info.n_subcores; ++sub) { |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 3979 | thr = is_power8 ? subcore_thread_map[sub] : sub; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3980 | thr0_done = false; |
| 3981 | active |= 1 << thr; |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 3982 | pvc = core_info.vc[sub]; |
| 3983 | pvc->pcpu = pcpu + thr; |
| 3984 | for_each_runnable_thread(i, vcpu, pvc) { |
Nicholas Piggin | c7fa848 | 2022-03-03 15:33:10 +1000 | [diff] [blame] | 3985 | /* |
| 3986 | * XXX: is kvmppc_start_thread called too late here? |
| 3987 | * It updates vcpu->cpu and vcpu->arch.thread_cpu |
| 3988 | * which are used by kvmppc_fast_vcpu_kick_hv(), but |
| 3989 | * kick is called after new exceptions become available |
| 3990 | * and exceptions are checked earlier than here, by |
| 3991 | * kvmppc_core_prepare_to_enter. |
| 3992 | */ |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 3993 | kvmppc_start_thread(vcpu, pvc); |
Nicholas Piggin | e4335f5 | 2022-09-08 23:25:45 +1000 | [diff] [blame] | 3994 | kvmppc_update_vpa_dispatch(vcpu, pvc); |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 3995 | trace_kvm_guest_enter(vcpu); |
| 3996 | if (!vcpu->arch.ptid) |
| 3997 | thr0_done = true; |
| 3998 | active |= 1 << (thr + vcpu->arch.ptid); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3999 | } |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 4000 | /* |
| 4001 | * We need to start the first thread of each subcore |
| 4002 | * even if it doesn't have a vcpu. |
| 4003 | */ |
| 4004 | if (!thr0_done) |
| 4005 | kvmppc_start_thread(NULL, pvc); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 4006 | } |
Gautham R. Shenoy | 7f23532 | 2015-09-02 21:48:58 +0530 | [diff] [blame] | 4007 | |
| 4008 | /* |
| 4009 | * Ensure that split_info.do_nap is set after setting |
| 4010 | * the vcore pointer in the PACA of the secondaries. |
| 4011 | */ |
| 4012 | smp_mb(); |
Gautham R. Shenoy | 7f23532 | 2015-09-02 21:48:58 +0530 | [diff] [blame] | 4013 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 4014 | /* |
| 4015 | * When doing micro-threading, poke the inactive threads as well. |
| 4016 | * This gets them to the nap instruction after kvm_do_nap, |
| 4017 | * which reduces the time taken to unsplit later. |
| 4018 | */ |
Nicholas Piggin | b1b1697 | 2021-01-18 16:28:06 +1000 | [diff] [blame] | 4019 | if (cmd_bit) { |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 4020 | split_info.do_nap = 1; /* ask secondaries to nap when done */ |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 4021 | for (thr = 1; thr < threads_per_subcore; ++thr) |
| 4022 | if (!(active & (1 << thr))) |
| 4023 | kvmppc_ipi_thread(pcpu + thr); |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 4024 | } |
Paul Mackerras | e0b7ec0 | 2014-01-08 21:25:20 +1100 | [diff] [blame] | 4025 | |
Paul Mackerras | 2f12f03 | 2012-10-15 01:17:17 +0000 | [diff] [blame] | 4026 | vc->vcore_state = VCORE_RUNNING; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4027 | preempt_disable(); |
Suresh E. Warrier | 3c78f78 | 2014-12-03 18:48:10 -0600 | [diff] [blame] | 4028 | |
| 4029 | trace_kvmppc_run_core(vc, 0); |
| 4030 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 4031 | for (sub = 0; sub < core_info.n_subcores; ++sub) |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 4032 | spin_unlock(&core_info.vc[sub]->lock); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 4033 | |
Nicholas Piggin | b31bc24 | 2022-09-08 23:25:43 +1000 | [diff] [blame] | 4034 | guest_timing_enter_irqoff(); |
Paul Mackerras | 2c9097e4 | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 4035 | |
Paul Mackerras | e0b7ec0 | 2014-01-08 21:25:20 +1100 | [diff] [blame] | 4036 | srcu_idx = srcu_read_lock(&vc->kvm->srcu); |
Paul Mackerras | 2c9097e4 | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 4037 | |
Nicholas Piggin | b31bc24 | 2022-09-08 23:25:43 +1000 | [diff] [blame] | 4038 | guest_state_enter_irqoff(); |
Naveen N. Rao | a4bc64d | 2018-04-19 12:34:05 +0530 | [diff] [blame] | 4039 | this_cpu_disable_ftrace(); |
| 4040 | |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 4041 | trap = __kvmppc_vcore_entry(); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4042 | |
Naveen N. Rao | a4bc64d | 2018-04-19 12:34:05 +0530 | [diff] [blame] | 4043 | this_cpu_enable_ftrace(); |
Nicholas Piggin | b31bc24 | 2022-09-08 23:25:43 +1000 | [diff] [blame] | 4044 | guest_state_exit_irqoff(); |
Naveen N. Rao | a4bc64d | 2018-04-19 12:34:05 +0530 | [diff] [blame] | 4045 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 4046 | srcu_read_unlock(&vc->kvm->srcu, srcu_idx); |
| 4047 | |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 4048 | set_irq_happened(trap); |
| 4049 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 4050 | spin_lock(&vc->lock); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4051 | /* prevent other vcpu threads from doing kvmppc_start_thread() now */ |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4052 | vc->vcore_state = VCORE_EXITING; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4053 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4054 | /* wait for secondary threads to finish writing their state to memory */ |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 4055 | kvmppc_wait_for_nap(controlled_threads); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 4056 | |
| 4057 | /* Return to whole-core mode if we split the core earlier */ |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 4058 | if (cmd_bit) { |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 4059 | unsigned long hid0 = mfspr(SPRN_HID0); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 4060 | |
| 4061 | hid0 &= ~HID0_POWER8_DYNLPARDIS; |
| 4062 | stat_bit = HID0_POWER8_2LPARMODE | HID0_POWER8_4LPARMODE; |
| 4063 | mb(); |
| 4064 | mtspr(SPRN_HID0, hid0); |
| 4065 | isync(); |
| 4066 | for (;;) { |
| 4067 | hid0 = mfspr(SPRN_HID0); |
| 4068 | if (!(hid0 & stat_bit)) |
| 4069 | break; |
| 4070 | cpu_relax(); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 4071 | } |
Nicholas Piggin | b1b1697 | 2021-01-18 16:28:06 +1000 | [diff] [blame] | 4072 | split_info.do_nap = 0; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 4073 | } |
| 4074 | |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 4075 | kvmppc_set_host_core(pcpu); |
| 4076 | |
Laurent Vivier | 235cee1 | 2021-10-28 00:21:50 +1000 | [diff] [blame] | 4077 | if (!vtime_accounting_enabled_this_cpu()) { |
| 4078 | local_irq_enable(); |
| 4079 | /* |
Nicholas Piggin | b31bc24 | 2022-09-08 23:25:43 +1000 | [diff] [blame] | 4080 | * Service IRQs here before guest_timing_exit_irqoff() so any |
Laurent Vivier | 235cee1 | 2021-10-28 00:21:50 +1000 | [diff] [blame] | 4081 | * ticks that occurred while running the guest are accounted to |
| 4082 | * the guest. If vtime accounting is enabled, accounting uses |
| 4083 | * TB rather than ticks, so it can be done without enabling |
| 4084 | * interrupts here, which has the problem that it accounts |
| 4085 | * interrupt processing overhead to the host. |
| 4086 | */ |
| 4087 | local_irq_disable(); |
| 4088 | } |
Nicholas Piggin | b31bc24 | 2022-09-08 23:25:43 +1000 | [diff] [blame] | 4089 | guest_timing_exit_irqoff(); |
Nicholas Piggin | 112665286 | 2021-01-30 23:08:12 +1000 | [diff] [blame] | 4090 | |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 4091 | local_irq_enable(); |
| 4092 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 4093 | /* Let secondaries go back to the offline loop */ |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 4094 | for (i = 0; i < controlled_threads; ++i) { |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 4095 | kvmppc_release_hwthread(pcpu + i); |
| 4096 | if (sip && sip->napped[i]) |
| 4097 | kvmppc_ipi_thread(pcpu + i); |
| 4098 | } |
| 4099 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4100 | spin_unlock(&vc->lock); |
Paul Mackerras | 2c9097e4 | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 4101 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4102 | /* make sure updates to secondary vcpu structs are visible now */ |
| 4103 | smp_mb(); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 4104 | |
Paul Mackerras | 36ee41d | 2018-01-30 10:51:32 +1100 | [diff] [blame] | 4105 | preempt_enable(); |
| 4106 | |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 4107 | for (sub = 0; sub < core_info.n_subcores; ++sub) { |
| 4108 | pvc = core_info.vc[sub]; |
| 4109 | post_guest_process(pvc, pvc == vc); |
| 4110 | } |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 4111 | |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 4112 | spin_lock(&vc->lock); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 4113 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 4114 | out: |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4115 | vc->vcore_state = VCORE_INACTIVE; |
Suresh E. Warrier | 3c78f78 | 2014-12-03 18:48:10 -0600 | [diff] [blame] | 4116 | trace_kvmppc_run_core(vc, 1); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4117 | } |
| 4118 | |
Nicholas Piggin | 9dc2bab | 2021-05-28 19:07:33 +1000 | [diff] [blame] | 4119 | static inline bool hcall_is_xics(unsigned long req) |
| 4120 | { |
| 4121 | return req == H_EOI || req == H_CPPR || req == H_IPI || |
| 4122 | req == H_IPOLL || req == H_XIRR || req == H_XIRR_X; |
| 4123 | } |
| 4124 | |
Nicholas Piggin | b1adcf5 | 2021-11-23 19:51:54 +1000 | [diff] [blame] | 4125 | static void vcpu_vpa_increment_dispatch(struct kvm_vcpu *vcpu) |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4126 | { |
Nicholas Piggin | b1adcf5 | 2021-11-23 19:51:54 +1000 | [diff] [blame] | 4127 | struct lppaca *lp = vcpu->arch.vpa.pinned_addr; |
| 4128 | if (lp) { |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4129 | u32 yield_count = be32_to_cpu(lp->yield_count) + 1; |
| 4130 | lp->yield_count = cpu_to_be32(yield_count); |
| 4131 | vcpu->arch.vpa.dirty = 1; |
| 4132 | } |
Nicholas Piggin | b1adcf5 | 2021-11-23 19:51:54 +1000 | [diff] [blame] | 4133 | } |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4134 | |
Gautam Menghani | e1f288d | 2024-05-20 23:27:40 +0530 | [diff] [blame] | 4135 | /* Helper functions for reading L2's stats from L1's VPA */ |
| 4136 | #ifdef CONFIG_PPC_PSERIES |
| 4137 | static DEFINE_PER_CPU(u64, l1_to_l2_cs); |
| 4138 | static DEFINE_PER_CPU(u64, l2_to_l1_cs); |
| 4139 | static DEFINE_PER_CPU(u64, l2_runtime_agg); |
| 4140 | |
| 4141 | int kvmhv_get_l2_counters_status(void) |
| 4142 | { |
| 4143 | return firmware_has_feature(FW_FEATURE_LPAR) && |
| 4144 | get_lppaca()->l2_counters_enable; |
| 4145 | } |
| 4146 | |
| 4147 | void kvmhv_set_l2_counters_status(int cpu, bool status) |
| 4148 | { |
| 4149 | if (!firmware_has_feature(FW_FEATURE_LPAR)) |
| 4150 | return; |
| 4151 | if (status) |
| 4152 | lppaca_of(cpu).l2_counters_enable = 1; |
| 4153 | else |
| 4154 | lppaca_of(cpu).l2_counters_enable = 0; |
| 4155 | } |
| 4156 | |
| 4157 | int kmvhv_counters_tracepoint_regfunc(void) |
| 4158 | { |
| 4159 | int cpu; |
| 4160 | |
| 4161 | for_each_present_cpu(cpu) { |
| 4162 | kvmhv_set_l2_counters_status(cpu, true); |
| 4163 | } |
| 4164 | return 0; |
| 4165 | } |
| 4166 | |
| 4167 | void kmvhv_counters_tracepoint_unregfunc(void) |
| 4168 | { |
| 4169 | int cpu; |
| 4170 | |
| 4171 | for_each_present_cpu(cpu) { |
| 4172 | kvmhv_set_l2_counters_status(cpu, false); |
| 4173 | } |
| 4174 | } |
| 4175 | |
| 4176 | static void do_trace_nested_cs_time(struct kvm_vcpu *vcpu) |
| 4177 | { |
| 4178 | struct lppaca *lp = get_lppaca(); |
| 4179 | u64 l1_to_l2_ns, l2_to_l1_ns, l2_runtime_ns; |
| 4180 | u64 *l1_to_l2_cs_ptr = this_cpu_ptr(&l1_to_l2_cs); |
| 4181 | u64 *l2_to_l1_cs_ptr = this_cpu_ptr(&l2_to_l1_cs); |
| 4182 | u64 *l2_runtime_agg_ptr = this_cpu_ptr(&l2_runtime_agg); |
| 4183 | |
| 4184 | l1_to_l2_ns = tb_to_ns(be64_to_cpu(lp->l1_to_l2_cs_tb)); |
| 4185 | l2_to_l1_ns = tb_to_ns(be64_to_cpu(lp->l2_to_l1_cs_tb)); |
| 4186 | l2_runtime_ns = tb_to_ns(be64_to_cpu(lp->l2_runtime_tb)); |
| 4187 | trace_kvmppc_vcpu_stats(vcpu, l1_to_l2_ns - *l1_to_l2_cs_ptr, |
| 4188 | l2_to_l1_ns - *l2_to_l1_cs_ptr, |
| 4189 | l2_runtime_ns - *l2_runtime_agg_ptr); |
| 4190 | *l1_to_l2_cs_ptr = l1_to_l2_ns; |
| 4191 | *l2_to_l1_cs_ptr = l2_to_l1_ns; |
| 4192 | *l2_runtime_agg_ptr = l2_runtime_ns; |
| 4193 | } |
| 4194 | |
| 4195 | #else |
| 4196 | int kvmhv_get_l2_counters_status(void) |
| 4197 | { |
| 4198 | return 0; |
| 4199 | } |
| 4200 | |
| 4201 | static void do_trace_nested_cs_time(struct kvm_vcpu *vcpu) |
| 4202 | { |
| 4203 | } |
| 4204 | #endif |
| 4205 | |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 4206 | static int kvmhv_vcpu_entry_nestedv2(struct kvm_vcpu *vcpu, u64 time_limit, |
| 4207 | unsigned long lpcr, u64 *tb) |
| 4208 | { |
| 4209 | struct kvmhv_nestedv2_io *io; |
| 4210 | unsigned long msr, i; |
| 4211 | int trap; |
| 4212 | long rc; |
| 4213 | |
Gautam Menghani | 54ec2bd | 2024-06-05 17:09:10 +0530 | [diff] [blame] | 4214 | if (vcpu->arch.doorbell_request) { |
| 4215 | vcpu->arch.doorbell_request = 0; |
| 4216 | kvmppc_set_dpdes(vcpu, 1); |
| 4217 | } |
| 4218 | |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 4219 | io = &vcpu->arch.nestedv2_io; |
| 4220 | |
| 4221 | msr = mfmsr(); |
| 4222 | kvmppc_msr_hard_disable_set_facilities(vcpu, msr); |
| 4223 | if (lazy_irq_pending()) |
| 4224 | return 0; |
| 4225 | |
| 4226 | rc = kvmhv_nestedv2_flush_vcpu(vcpu, time_limit); |
| 4227 | if (rc < 0) |
| 4228 | return -EINVAL; |
| 4229 | |
Jordan Niethe | ec0f663 | 2023-12-01 18:56:10 +0530 | [diff] [blame] | 4230 | kvmppc_gse_put_u64(io->vcpu_run_input, KVMPPC_GSID_LPCR, lpcr); |
| 4231 | |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 4232 | accumulate_time(vcpu, &vcpu->arch.in_guest); |
| 4233 | rc = plpar_guest_run_vcpu(0, vcpu->kvm->arch.lpid, vcpu->vcpu_id, |
| 4234 | &trap, &i); |
| 4235 | |
| 4236 | if (rc != H_SUCCESS) { |
| 4237 | pr_err("KVM Guest Run VCPU hcall failed\n"); |
| 4238 | if (rc == H_INVALID_ELEMENT_ID) |
| 4239 | pr_err("KVM: Guest Run VCPU invalid element id at %ld\n", i); |
| 4240 | else if (rc == H_INVALID_ELEMENT_SIZE) |
| 4241 | pr_err("KVM: Guest Run VCPU invalid element size at %ld\n", i); |
| 4242 | else if (rc == H_INVALID_ELEMENT_VALUE) |
| 4243 | pr_err("KVM: Guest Run VCPU invalid element value at %ld\n", i); |
| 4244 | return -EINVAL; |
| 4245 | } |
| 4246 | accumulate_time(vcpu, &vcpu->arch.guest_exit); |
| 4247 | |
| 4248 | *tb = mftb(); |
| 4249 | kvmppc_gsm_reset(io->vcpu_message); |
| 4250 | kvmppc_gsm_reset(io->vcore_message); |
| 4251 | kvmppc_gsbm_zero(&io->valids); |
| 4252 | |
| 4253 | rc = kvmhv_nestedv2_parse_output(vcpu); |
| 4254 | if (rc < 0) |
| 4255 | return -EINVAL; |
| 4256 | |
| 4257 | timer_rearm_host_dec(*tb); |
| 4258 | |
Gautam Menghani | e1f288d | 2024-05-20 23:27:40 +0530 | [diff] [blame] | 4259 | /* Record context switch and guest_run_time data */ |
| 4260 | if (kvmhv_get_l2_counters_status()) |
| 4261 | do_trace_nested_cs_time(vcpu); |
| 4262 | |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 4263 | return trap; |
| 4264 | } |
| 4265 | |
Nicholas Piggin | 08b3f08 | 2021-11-23 19:52:08 +1000 | [diff] [blame] | 4266 | /* call our hypervisor to load up HV regs and go */ |
| 4267 | static int kvmhv_vcpu_entry_p9_nested(struct kvm_vcpu *vcpu, u64 time_limit, unsigned long lpcr, u64 *tb) |
| 4268 | { |
Nicholas Piggin | 08b3f08 | 2021-11-23 19:52:08 +1000 | [diff] [blame] | 4269 | unsigned long host_psscr; |
Nicholas Piggin | d5f4801 | 2021-11-23 19:52:09 +1000 | [diff] [blame] | 4270 | unsigned long msr; |
Nicholas Piggin | 08b3f08 | 2021-11-23 19:52:08 +1000 | [diff] [blame] | 4271 | struct hv_guest_state hvregs; |
Nicholas Piggin | d5f4801 | 2021-11-23 19:52:09 +1000 | [diff] [blame] | 4272 | struct p9_host_os_sprs host_os_sprs; |
Nicholas Piggin | 08b3f08 | 2021-11-23 19:52:08 +1000 | [diff] [blame] | 4273 | s64 dec; |
Nicholas Piggin | d5f4801 | 2021-11-23 19:52:09 +1000 | [diff] [blame] | 4274 | int trap; |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4275 | |
Nicholas Piggin | b49c65c | 2021-11-23 19:52:23 +1000 | [diff] [blame] | 4276 | msr = mfmsr(); |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4277 | |
Nicholas Piggin | d5f4801 | 2021-11-23 19:52:09 +1000 | [diff] [blame] | 4278 | save_p9_host_os_sprs(&host_os_sprs); |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4279 | |
Nicholas Piggin | 6ffe2c6 | 2021-05-28 19:07:30 +1000 | [diff] [blame] | 4280 | /* |
Nicholas Piggin | 08b3f08 | 2021-11-23 19:52:08 +1000 | [diff] [blame] | 4281 | * We need to save and restore the guest visible part of the |
| 4282 | * psscr (i.e. using SPRN_PSSCR_PR) since the hypervisor |
| 4283 | * doesn't do this for us. Note only required if pseries since |
| 4284 | * this is done in kvmhv_vcpu_entry_p9() below otherwise. |
| 4285 | */ |
| 4286 | host_psscr = mfspr(SPRN_PSSCR_PR); |
Nicholas Piggin | d5f4801 | 2021-11-23 19:52:09 +1000 | [diff] [blame] | 4287 | |
Nicholas Piggin | b49c65c | 2021-11-23 19:52:23 +1000 | [diff] [blame] | 4288 | kvmppc_msr_hard_disable_set_facilities(vcpu, msr); |
Nicholas Piggin | d5f4801 | 2021-11-23 19:52:09 +1000 | [diff] [blame] | 4289 | if (lazy_irq_pending()) |
| 4290 | return 0; |
| 4291 | |
Nicholas Piggin | d5f4801 | 2021-11-23 19:52:09 +1000 | [diff] [blame] | 4292 | if (unlikely(load_vcpu_state(vcpu, &host_os_sprs))) |
| 4293 | msr = mfmsr(); /* TM restore can update msr */ |
| 4294 | |
Nicholas Piggin | a089a68 | 2021-11-23 19:52:19 +1000 | [diff] [blame] | 4295 | if (vcpu->arch.psscr != host_psscr) |
| 4296 | mtspr(SPRN_PSSCR_PR, vcpu->arch.psscr); |
| 4297 | |
Nicholas Piggin | 08b3f08 | 2021-11-23 19:52:08 +1000 | [diff] [blame] | 4298 | kvmhv_save_hv_regs(vcpu, &hvregs); |
| 4299 | hvregs.lpcr = lpcr; |
Fabiano Rosas | 1d1cd0f | 2022-04-25 11:21:51 -0300 | [diff] [blame] | 4300 | hvregs.amor = ~0; |
Nicholas Piggin | 08b3f08 | 2021-11-23 19:52:08 +1000 | [diff] [blame] | 4301 | vcpu->arch.regs.msr = vcpu->arch.shregs.msr; |
| 4302 | hvregs.version = HV_GUEST_STATE_VERSION; |
| 4303 | if (vcpu->arch.nested) { |
| 4304 | hvregs.lpid = vcpu->arch.nested->shadow_lpid; |
| 4305 | hvregs.vcpu_token = vcpu->arch.nested_vcpu_id; |
| 4306 | } else { |
| 4307 | hvregs.lpid = vcpu->kvm->arch.lpid; |
| 4308 | hvregs.vcpu_token = vcpu->vcpu_id; |
| 4309 | } |
| 4310 | hvregs.hdec_expiry = time_limit; |
| 4311 | |
| 4312 | /* |
| 4313 | * When setting DEC, we must always deal with irq_work_raise |
| 4314 | * via NMI vs setting DEC. The problem occurs right as we |
| 4315 | * switch into guest mode if a NMI hits and sets pending work |
| 4316 | * and sets DEC, then that will apply to the guest and not |
| 4317 | * bring us back to the host. |
Nicholas Piggin | 6ffe2c6 | 2021-05-28 19:07:30 +1000 | [diff] [blame] | 4318 | * |
Nicholas Piggin | 08b3f08 | 2021-11-23 19:52:08 +1000 | [diff] [blame] | 4319 | * irq_work_raise could check a flag (or possibly LPCR[HDICE] |
| 4320 | * for example) and set HDEC to 1? That wouldn't solve the |
| 4321 | * nested hv case which needs to abort the hcall or zero the |
| 4322 | * time limit. |
Nicholas Piggin | 6ffe2c6 | 2021-05-28 19:07:30 +1000 | [diff] [blame] | 4323 | * |
| 4324 | * XXX: Another day's problem. |
| 4325 | */ |
Nicholas Piggin | 08b3f08 | 2021-11-23 19:52:08 +1000 | [diff] [blame] | 4326 | mtspr(SPRN_DEC, kvmppc_dec_expires_host_tb(vcpu) - *tb); |
| 4327 | |
| 4328 | mtspr(SPRN_DAR, vcpu->arch.shregs.dar); |
| 4329 | mtspr(SPRN_DSISR, vcpu->arch.shregs.dsisr); |
Nicholas Piggin | 3e7b337 | 2021-11-23 19:52:11 +1000 | [diff] [blame] | 4330 | switch_pmu_to_guest(vcpu, &host_os_sprs); |
Fabiano Rosas | b44bb1b | 2022-05-25 10:05:54 -0300 | [diff] [blame] | 4331 | accumulate_time(vcpu, &vcpu->arch.in_guest); |
Nicholas Piggin | 08b3f08 | 2021-11-23 19:52:08 +1000 | [diff] [blame] | 4332 | trap = plpar_hcall_norets(H_ENTER_NESTED, __pa(&hvregs), |
| 4333 | __pa(&vcpu->arch.regs)); |
Fabiano Rosas | b44bb1b | 2022-05-25 10:05:54 -0300 | [diff] [blame] | 4334 | accumulate_time(vcpu, &vcpu->arch.guest_exit); |
Nicholas Piggin | 08b3f08 | 2021-11-23 19:52:08 +1000 | [diff] [blame] | 4335 | kvmhv_restore_hv_return_state(vcpu, &hvregs); |
Nicholas Piggin | 3e7b337 | 2021-11-23 19:52:11 +1000 | [diff] [blame] | 4336 | switch_pmu_to_host(vcpu, &host_os_sprs); |
Nicholas Piggin | 08b3f08 | 2021-11-23 19:52:08 +1000 | [diff] [blame] | 4337 | vcpu->arch.shregs.msr = vcpu->arch.regs.msr; |
| 4338 | vcpu->arch.shregs.dar = mfspr(SPRN_DAR); |
| 4339 | vcpu->arch.shregs.dsisr = mfspr(SPRN_DSISR); |
| 4340 | vcpu->arch.psscr = mfspr(SPRN_PSSCR_PR); |
Nicholas Piggin | 08b3f08 | 2021-11-23 19:52:08 +1000 | [diff] [blame] | 4341 | |
Nicholas Piggin | d5f4801 | 2021-11-23 19:52:09 +1000 | [diff] [blame] | 4342 | store_vcpu_state(vcpu); |
| 4343 | |
Nicholas Piggin | 08b3f08 | 2021-11-23 19:52:08 +1000 | [diff] [blame] | 4344 | dec = mfspr(SPRN_DEC); |
| 4345 | if (!(lpcr & LPCR_LD)) /* Sign extend if not using large decrementer */ |
| 4346 | dec = (s32) dec; |
| 4347 | *tb = mftb(); |
Jordan Niethe | c8ae9b3 | 2023-09-14 13:05:54 +1000 | [diff] [blame] | 4348 | vcpu->arch.dec_expires = dec + (*tb + kvmppc_get_tb_offset(vcpu)); |
Nicholas Piggin | 08b3f08 | 2021-11-23 19:52:08 +1000 | [diff] [blame] | 4349 | |
Nicholas Piggin | d5f4801 | 2021-11-23 19:52:09 +1000 | [diff] [blame] | 4350 | timer_rearm_host_dec(*tb); |
| 4351 | |
| 4352 | restore_p9_host_os_sprs(vcpu, &host_os_sprs); |
Nicholas Piggin | a089a68 | 2021-11-23 19:52:19 +1000 | [diff] [blame] | 4353 | if (vcpu->arch.psscr != host_psscr) |
| 4354 | mtspr(SPRN_PSSCR_PR, host_psscr); |
Nicholas Piggin | d5f4801 | 2021-11-23 19:52:09 +1000 | [diff] [blame] | 4355 | |
Nicholas Piggin | 08b3f08 | 2021-11-23 19:52:08 +1000 | [diff] [blame] | 4356 | return trap; |
| 4357 | } |
| 4358 | |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4359 | /* |
| 4360 | * Guest entry for POWER9 and later CPUs. |
| 4361 | */ |
| 4362 | static int kvmhv_p9_guest_entry(struct kvm_vcpu *vcpu, u64 time_limit, |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 4363 | unsigned long lpcr, u64 *tb) |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4364 | { |
Nicholas Piggin | 42b4a2b | 2022-03-03 15:33:13 +1000 | [diff] [blame] | 4365 | struct kvm *kvm = vcpu->kvm; |
| 4366 | struct kvm_nested_guest *nested = vcpu->arch.nested; |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 4367 | u64 next_timer; |
Nicholas Piggin | 57dc0ee | 2021-11-23 19:51:51 +1000 | [diff] [blame] | 4368 | int trap; |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4369 | |
Nicholas Piggin | 4ebbd07 | 2021-11-23 19:51:42 +1000 | [diff] [blame] | 4370 | next_timer = timer_get_next_tb(); |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 4371 | if (*tb >= next_timer) |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4372 | return BOOK3S_INTERRUPT_HV_DECREMENTER; |
Nicholas Piggin | 4ebbd07 | 2021-11-23 19:51:42 +1000 | [diff] [blame] | 4373 | if (next_timer < time_limit) |
| 4374 | time_limit = next_timer; |
Nicholas Piggin | 46dea77 | 2021-11-23 19:52:22 +1000 | [diff] [blame] | 4375 | else if (*tb >= time_limit) /* nested time limit */ |
| 4376 | return BOOK3S_INTERRUPT_NESTED_HV_DECREMENTER; |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4377 | |
Nicholas Piggin | 34e119c9 | 2021-11-23 19:51:57 +1000 | [diff] [blame] | 4378 | vcpu->arch.ceded = 0; |
| 4379 | |
Nicholas Piggin | b1adcf5 | 2021-11-23 19:51:54 +1000 | [diff] [blame] | 4380 | vcpu_vpa_increment_dispatch(vcpu); |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4381 | |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 4382 | if (kvmhv_on_pseries()) { |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 4383 | if (kvmhv_is_nestedv1()) |
| 4384 | trap = kvmhv_vcpu_entry_p9_nested(vcpu, time_limit, lpcr, tb); |
| 4385 | else |
| 4386 | trap = kvmhv_vcpu_entry_nestedv2(vcpu, time_limit, lpcr, tb); |
Paul Mackerras | 4bad777 | 2018-10-08 16:31:06 +1100 | [diff] [blame] | 4387 | |
| 4388 | /* H_CEDE has to be handled now, not later */ |
Nicholas Piggin | 42b4a2b | 2022-03-03 15:33:13 +1000 | [diff] [blame] | 4389 | if (trap == BOOK3S_INTERRUPT_SYSCALL && !nested && |
Paul Mackerras | 4bad777 | 2018-10-08 16:31:06 +1100 | [diff] [blame] | 4390 | kvmppc_get_gpr(vcpu, 3) == H_CEDE) { |
Nicholas Piggin | 9dc2bab | 2021-05-28 19:07:33 +1000 | [diff] [blame] | 4391 | kvmppc_cede(vcpu); |
Michael Roth | 1f50cc1 | 2020-03-10 16:11:28 -0500 | [diff] [blame] | 4392 | kvmppc_set_gpr(vcpu, 3, 0); |
Paul Mackerras | 4bad777 | 2018-10-08 16:31:06 +1100 | [diff] [blame] | 4393 | trap = 0; |
| 4394 | } |
Nicholas Piggin | 3c1a4322 | 2021-11-23 19:52:00 +1000 | [diff] [blame] | 4395 | |
Nicholas Piggin | 42b4a2b | 2022-03-03 15:33:13 +1000 | [diff] [blame] | 4396 | } else if (nested) { |
Nicholas Piggin | 434398a | 2021-11-23 19:52:27 +1000 | [diff] [blame] | 4397 | __this_cpu_write(cpu_in_guest, kvm); |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 4398 | trap = kvmhv_vcpu_entry_p9(vcpu, time_limit, lpcr, tb); |
Nicholas Piggin | 434398a | 2021-11-23 19:52:27 +1000 | [diff] [blame] | 4399 | __this_cpu_write(cpu_in_guest, NULL); |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 4400 | |
Nicholas Piggin | 42b4a2b | 2022-03-03 15:33:13 +1000 | [diff] [blame] | 4401 | } else { |
Nicholas Piggin | 09512c2 | 2021-05-28 19:07:31 +1000 | [diff] [blame] | 4402 | kvmppc_xive_push_vcpu(vcpu); |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 4403 | |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 4404 | __this_cpu_write(cpu_in_guest, kvm); |
Nicholas Piggin | c00366e2 | 2021-05-28 19:07:35 +1000 | [diff] [blame] | 4405 | trap = kvmhv_vcpu_entry_p9(vcpu, time_limit, lpcr, tb); |
Nicholas Piggin | 434398a | 2021-11-23 19:52:27 +1000 | [diff] [blame] | 4406 | __this_cpu_write(cpu_in_guest, NULL); |
| 4407 | |
Nicholas Piggin | 42b4a2b | 2022-03-03 15:33:13 +1000 | [diff] [blame] | 4408 | if (trap == BOOK3S_INTERRUPT_SYSCALL && |
Jordan Niethe | 6de2e83 | 2023-09-14 13:05:56 +1000 | [diff] [blame] | 4409 | !(__kvmppc_get_msr_hv(vcpu) & MSR_PR)) { |
Nicholas Piggin | 9dc2bab | 2021-05-28 19:07:33 +1000 | [diff] [blame] | 4410 | unsigned long req = kvmppc_get_gpr(vcpu, 3); |
Nicholas Piggin | 09512c2 | 2021-05-28 19:07:31 +1000 | [diff] [blame] | 4411 | |
Nicholas Piggin | 11681b7 | 2022-03-03 15:33:14 +1000 | [diff] [blame] | 4412 | /* |
| 4413 | * XIVE rearm and XICS hcalls must be handled |
| 4414 | * before xive context is pulled (is this |
| 4415 | * true?) |
| 4416 | */ |
Nicholas Piggin | 9dc2bab | 2021-05-28 19:07:33 +1000 | [diff] [blame] | 4417 | if (req == H_CEDE) { |
Nicholas Piggin | 11681b7 | 2022-03-03 15:33:14 +1000 | [diff] [blame] | 4418 | /* H_CEDE has to be handled now */ |
Nicholas Piggin | 9dc2bab | 2021-05-28 19:07:33 +1000 | [diff] [blame] | 4419 | kvmppc_cede(vcpu); |
Nicholas Piggin | ad5ace9 | 2022-03-03 15:33:12 +1000 | [diff] [blame] | 4420 | if (!kvmppc_xive_rearm_escalation(vcpu)) { |
| 4421 | /* |
| 4422 | * Pending escalation so abort |
| 4423 | * the cede. |
| 4424 | */ |
| 4425 | vcpu->arch.ceded = 0; |
| 4426 | } |
Nicholas Piggin | 9dc2bab | 2021-05-28 19:07:33 +1000 | [diff] [blame] | 4427 | kvmppc_set_gpr(vcpu, 3, 0); |
| 4428 | trap = 0; |
| 4429 | |
Nicholas Piggin | 11681b7 | 2022-03-03 15:33:14 +1000 | [diff] [blame] | 4430 | } else if (req == H_ENTER_NESTED) { |
| 4431 | /* |
| 4432 | * L2 should not run with the L1 |
| 4433 | * context so rearm and pull it. |
| 4434 | */ |
| 4435 | if (!kvmppc_xive_rearm_escalation(vcpu)) { |
| 4436 | /* |
| 4437 | * Pending escalation so abort |
| 4438 | * H_ENTER_NESTED. |
| 4439 | */ |
| 4440 | kvmppc_set_gpr(vcpu, 3, 0); |
| 4441 | trap = 0; |
| 4442 | } |
| 4443 | |
Nicholas Piggin | 9dc2bab | 2021-05-28 19:07:33 +1000 | [diff] [blame] | 4444 | } else if (hcall_is_xics(req)) { |
| 4445 | int ret; |
| 4446 | |
| 4447 | ret = kvmppc_xive_xics_hcall(vcpu, req); |
| 4448 | if (ret != H_TOO_HARD) { |
| 4449 | kvmppc_set_gpr(vcpu, 3, ret); |
| 4450 | trap = 0; |
| 4451 | } |
| 4452 | } |
| 4453 | } |
| 4454 | kvmppc_xive_pull_vcpu(vcpu); |
Nicholas Piggin | 89d35b2 | 2021-05-28 19:07:34 +1000 | [diff] [blame] | 4455 | |
Nicholas Piggin | 434398a | 2021-11-23 19:52:27 +1000 | [diff] [blame] | 4456 | if (kvm_is_radix(kvm)) |
Nicholas Piggin | 079a09a | 2021-05-28 19:07:50 +1000 | [diff] [blame] | 4457 | vcpu->arch.slb_max = 0; |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 4458 | } |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4459 | |
Nicholas Piggin | b1adcf5 | 2021-11-23 19:51:54 +1000 | [diff] [blame] | 4460 | vcpu_vpa_increment_dispatch(vcpu); |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4461 | |
| 4462 | return trap; |
| 4463 | } |
| 4464 | |
| 4465 | /* |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4466 | * Wait for some other vcpu thread to execute us, and |
| 4467 | * wake us up when we need to handle something in the host. |
| 4468 | */ |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 4469 | static void kvmppc_wait_for_exec(struct kvmppc_vcore *vc, |
| 4470 | struct kvm_vcpu *vcpu, int wait_state) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4471 | { |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4472 | DEFINE_WAIT(wait); |
| 4473 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4474 | prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 4475 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { |
| 4476 | spin_unlock(&vc->lock); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4477 | schedule(); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 4478 | spin_lock(&vc->lock); |
| 4479 | } |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4480 | finish_wait(&vcpu->arch.cpu_run, &wait); |
| 4481 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4482 | |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4483 | static void grow_halt_poll_ns(struct kvmppc_vcore *vc) |
| 4484 | { |
Nir Weiner | 7fa08e7 | 2019-01-27 12:17:14 +0200 | [diff] [blame] | 4485 | if (!halt_poll_ns_grow) |
| 4486 | return; |
| 4487 | |
Nir Weiner | dee339b | 2019-01-27 12:17:16 +0200 | [diff] [blame] | 4488 | vc->halt_poll_ns *= halt_poll_ns_grow; |
| 4489 | if (vc->halt_poll_ns < halt_poll_ns_grow_start) |
Nir Weiner | 49113d3 | 2019-01-27 12:17:15 +0200 | [diff] [blame] | 4490 | vc->halt_poll_ns = halt_poll_ns_grow_start; |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4491 | } |
| 4492 | |
| 4493 | static void shrink_halt_poll_ns(struct kvmppc_vcore *vc) |
| 4494 | { |
| 4495 | if (halt_poll_ns_shrink == 0) |
| 4496 | vc->halt_poll_ns = 0; |
| 4497 | else |
| 4498 | vc->halt_poll_ns /= halt_poll_ns_shrink; |
| 4499 | } |
| 4500 | |
Paul Mackerras | ee3308a | 2017-06-20 15:46:12 +1000 | [diff] [blame] | 4501 | #ifdef CONFIG_KVM_XICS |
| 4502 | static inline bool xive_interrupt_pending(struct kvm_vcpu *vcpu) |
| 4503 | { |
Paul Mackerras | 03f9533 | 2019-02-04 22:07:20 +1100 | [diff] [blame] | 4504 | if (!xics_on_xive()) |
Paul Mackerras | ee3308a | 2017-06-20 15:46:12 +1000 | [diff] [blame] | 4505 | return false; |
Benjamin Herrenschmidt | 2267ea7 | 2018-01-12 13:37:13 +1100 | [diff] [blame] | 4506 | return vcpu->arch.irq_pending || vcpu->arch.xive_saved_state.pipr < |
Paul Mackerras | ee3308a | 2017-06-20 15:46:12 +1000 | [diff] [blame] | 4507 | vcpu->arch.xive_saved_state.cppr; |
| 4508 | } |
| 4509 | #else |
| 4510 | static inline bool xive_interrupt_pending(struct kvm_vcpu *vcpu) |
| 4511 | { |
| 4512 | return false; |
| 4513 | } |
| 4514 | #endif /* CONFIG_KVM_XICS */ |
| 4515 | |
Paul Mackerras | 1da4e2f | 2017-05-19 16:26:16 +1000 | [diff] [blame] | 4516 | static bool kvmppc_vcpu_woken(struct kvm_vcpu *vcpu) |
| 4517 | { |
| 4518 | if (vcpu->arch.pending_exceptions || vcpu->arch.prodded || |
Paul Mackerras | ee3308a | 2017-06-20 15:46:12 +1000 | [diff] [blame] | 4519 | kvmppc_doorbell_pending(vcpu) || xive_interrupt_pending(vcpu)) |
Paul Mackerras | 1da4e2f | 2017-05-19 16:26:16 +1000 | [diff] [blame] | 4520 | return true; |
| 4521 | |
| 4522 | return false; |
| 4523 | } |
| 4524 | |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 4525 | static bool kvmppc_vcpu_check_block(struct kvm_vcpu *vcpu) |
| 4526 | { |
| 4527 | if (!vcpu->arch.ceded || kvmppc_vcpu_woken(vcpu)) |
| 4528 | return true; |
| 4529 | return false; |
| 4530 | } |
| 4531 | |
Suraj Jitindar Singh | 908a093 | 2016-10-14 11:53:23 +1100 | [diff] [blame] | 4532 | /* |
| 4533 | * Check to see if any of the runnable vcpus on the vcore have pending |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4534 | * exceptions or are no longer ceded |
| 4535 | */ |
| 4536 | static int kvmppc_vcore_check_block(struct kvmppc_vcore *vc) |
| 4537 | { |
| 4538 | struct kvm_vcpu *vcpu; |
| 4539 | int i; |
| 4540 | |
| 4541 | for_each_runnable_thread(i, vcpu, vc) { |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 4542 | if (kvmppc_vcpu_check_block(vcpu)) |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4543 | return 1; |
| 4544 | } |
| 4545 | |
| 4546 | return 0; |
| 4547 | } |
| 4548 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4549 | /* |
| 4550 | * All the vcpus in this vcore are idle, so wait for a decrementer |
| 4551 | * or external interrupt to one of the vcpus. vc->lock is held. |
| 4552 | */ |
| 4553 | static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) |
| 4554 | { |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 4555 | ktime_t cur, start_poll, start_wait; |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4556 | int do_sleep = 1; |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4557 | u64 block_ns; |
Suresh E. Warrier | 1bc5d59 | 2014-11-03 15:52:00 +1100 | [diff] [blame] | 4558 | |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 4559 | WARN_ON_ONCE(cpu_has_feature(CPU_FTR_ARCH_300)); |
| 4560 | |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4561 | /* Poll for pending exceptions and ceded state */ |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 4562 | cur = start_poll = ktime_get(); |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4563 | if (vc->halt_poll_ns) { |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 4564 | ktime_t stop = ktime_add_ns(start_poll, vc->halt_poll_ns); |
Jing Zhang | 0193cc9 | 2021-06-18 22:27:03 +0000 | [diff] [blame] | 4565 | ++vc->runner->stat.generic.halt_attempted_poll; |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4566 | |
| 4567 | vc->vcore_state = VCORE_POLLING; |
| 4568 | spin_unlock(&vc->lock); |
| 4569 | |
| 4570 | do { |
| 4571 | if (kvmppc_vcore_check_block(vc)) { |
| 4572 | do_sleep = 0; |
| 4573 | break; |
| 4574 | } |
| 4575 | cur = ktime_get(); |
Wanpeng Li | 6bd5b74 | 2021-05-18 05:00:31 -0700 | [diff] [blame] | 4576 | } while (kvm_vcpu_can_poll(cur, stop)); |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4577 | |
| 4578 | spin_lock(&vc->lock); |
| 4579 | vc->vcore_state = VCORE_INACTIVE; |
| 4580 | |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 4581 | if (!do_sleep) { |
Jing Zhang | 0193cc9 | 2021-06-18 22:27:03 +0000 | [diff] [blame] | 4582 | ++vc->runner->stat.generic.halt_successful_poll; |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4583 | goto out; |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 4584 | } |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4585 | } |
| 4586 | |
Davidlohr Bueso | da4ad88 | 2020-04-23 22:48:37 -0700 | [diff] [blame] | 4587 | prepare_to_rcuwait(&vc->wait); |
| 4588 | set_current_state(TASK_INTERRUPTIBLE); |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4589 | if (kvmppc_vcore_check_block(vc)) { |
Davidlohr Bueso | da4ad88 | 2020-04-23 22:48:37 -0700 | [diff] [blame] | 4590 | finish_rcuwait(&vc->wait); |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4591 | do_sleep = 0; |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 4592 | /* If we polled, count this as a successful poll */ |
| 4593 | if (vc->halt_poll_ns) |
Jing Zhang | 0193cc9 | 2021-06-18 22:27:03 +0000 | [diff] [blame] | 4594 | ++vc->runner->stat.generic.halt_successful_poll; |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4595 | goto out; |
Suresh E. Warrier | 1bc5d59 | 2014-11-03 15:52:00 +1100 | [diff] [blame] | 4596 | } |
| 4597 | |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 4598 | start_wait = ktime_get(); |
| 4599 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4600 | vc->vcore_state = VCORE_SLEEPING; |
Fabiano Rosas | ad55bae | 2022-03-28 18:58:31 -0300 | [diff] [blame] | 4601 | trace_kvmppc_vcore_blocked(vc->runner, 0); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4602 | spin_unlock(&vc->lock); |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 4603 | schedule(); |
Davidlohr Bueso | da4ad88 | 2020-04-23 22:48:37 -0700 | [diff] [blame] | 4604 | finish_rcuwait(&vc->wait); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4605 | spin_lock(&vc->lock); |
| 4606 | vc->vcore_state = VCORE_INACTIVE; |
Fabiano Rosas | ad55bae | 2022-03-28 18:58:31 -0300 | [diff] [blame] | 4607 | trace_kvmppc_vcore_blocked(vc->runner, 1); |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 4608 | ++vc->runner->stat.halt_successful_wait; |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4609 | |
| 4610 | cur = ktime_get(); |
| 4611 | |
| 4612 | out: |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 4613 | block_ns = ktime_to_ns(cur) - ktime_to_ns(start_poll); |
| 4614 | |
| 4615 | /* Attribute wait time */ |
| 4616 | if (do_sleep) { |
Jing Zhang | 87bcc5f | 2021-08-02 16:56:32 +0000 | [diff] [blame] | 4617 | vc->runner->stat.generic.halt_wait_ns += |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 4618 | ktime_to_ns(cur) - ktime_to_ns(start_wait); |
Jing Zhang | 8ccba53 | 2021-08-02 16:56:33 +0000 | [diff] [blame] | 4619 | KVM_STATS_LOG_HIST_UPDATE( |
| 4620 | vc->runner->stat.generic.halt_wait_hist, |
| 4621 | ktime_to_ns(cur) - ktime_to_ns(start_wait)); |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 4622 | /* Attribute failed poll time */ |
Jing Zhang | 8ccba53 | 2021-08-02 16:56:33 +0000 | [diff] [blame] | 4623 | if (vc->halt_poll_ns) { |
Jing Zhang | 0193cc9 | 2021-06-18 22:27:03 +0000 | [diff] [blame] | 4624 | vc->runner->stat.generic.halt_poll_fail_ns += |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 4625 | ktime_to_ns(start_wait) - |
| 4626 | ktime_to_ns(start_poll); |
Jing Zhang | 8ccba53 | 2021-08-02 16:56:33 +0000 | [diff] [blame] | 4627 | KVM_STATS_LOG_HIST_UPDATE( |
| 4628 | vc->runner->stat.generic.halt_poll_fail_hist, |
| 4629 | ktime_to_ns(start_wait) - |
| 4630 | ktime_to_ns(start_poll)); |
| 4631 | } |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 4632 | } else { |
| 4633 | /* Attribute successful poll time */ |
Jing Zhang | 8ccba53 | 2021-08-02 16:56:33 +0000 | [diff] [blame] | 4634 | if (vc->halt_poll_ns) { |
Jing Zhang | 0193cc9 | 2021-06-18 22:27:03 +0000 | [diff] [blame] | 4635 | vc->runner->stat.generic.halt_poll_success_ns += |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 4636 | ktime_to_ns(cur) - |
| 4637 | ktime_to_ns(start_poll); |
Jing Zhang | 8ccba53 | 2021-08-02 16:56:33 +0000 | [diff] [blame] | 4638 | KVM_STATS_LOG_HIST_UPDATE( |
| 4639 | vc->runner->stat.generic.halt_poll_success_hist, |
| 4640 | ktime_to_ns(cur) - ktime_to_ns(start_poll)); |
| 4641 | } |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 4642 | } |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4643 | |
| 4644 | /* Adjust poll time */ |
Suraj Jitindar Singh | 307d93e4 | 2016-10-14 11:53:20 +1100 | [diff] [blame] | 4645 | if (halt_poll_ns) { |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4646 | if (block_ns <= vc->halt_poll_ns) |
| 4647 | ; |
| 4648 | /* We slept and blocked for longer than the max halt time */ |
Suraj Jitindar Singh | 307d93e4 | 2016-10-14 11:53:20 +1100 | [diff] [blame] | 4649 | else if (vc->halt_poll_ns && block_ns > halt_poll_ns) |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4650 | shrink_halt_poll_ns(vc); |
| 4651 | /* We slept and our poll time is too small */ |
Suraj Jitindar Singh | 307d93e4 | 2016-10-14 11:53:20 +1100 | [diff] [blame] | 4652 | else if (vc->halt_poll_ns < halt_poll_ns && |
| 4653 | block_ns < halt_poll_ns) |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4654 | grow_halt_poll_ns(vc); |
Suraj Jitindar Singh | e03f392 | 2016-10-14 11:53:21 +1100 | [diff] [blame] | 4655 | if (vc->halt_poll_ns > halt_poll_ns) |
| 4656 | vc->halt_poll_ns = halt_poll_ns; |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 4657 | } else |
| 4658 | vc->halt_poll_ns = 0; |
| 4659 | |
| 4660 | trace_kvmppc_vcore_wakeup(do_sleep, block_ns); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4661 | } |
| 4662 | |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 4663 | /* |
| 4664 | * This never fails for a radix guest, as none of the operations it does |
| 4665 | * for a radix guest can fail or have a way to report failure. |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 4666 | */ |
Paul Mackerras | 432953b | 2017-11-09 15:37:10 +1100 | [diff] [blame] | 4667 | static int kvmhv_setup_mmu(struct kvm_vcpu *vcpu) |
| 4668 | { |
| 4669 | int r = 0; |
| 4670 | struct kvm *kvm = vcpu->kvm; |
| 4671 | |
Paul Mackerras | 0d4ee88 | 2019-05-23 16:35:34 +1000 | [diff] [blame] | 4672 | mutex_lock(&kvm->arch.mmu_setup_lock); |
Paul Mackerras | 432953b | 2017-11-09 15:37:10 +1100 | [diff] [blame] | 4673 | if (!kvm->arch.mmu_ready) { |
| 4674 | if (!kvm_is_radix(kvm)) |
| 4675 | r = kvmppc_hv_setup_htab_rma(vcpu); |
| 4676 | if (!r) { |
| 4677 | if (cpu_has_feature(CPU_FTR_ARCH_300)) |
| 4678 | kvmppc_setup_partition_table(kvm); |
| 4679 | kvm->arch.mmu_ready = 1; |
| 4680 | } |
| 4681 | } |
Paul Mackerras | 0d4ee88 | 2019-05-23 16:35:34 +1000 | [diff] [blame] | 4682 | mutex_unlock(&kvm->arch.mmu_setup_lock); |
Paul Mackerras | 432953b | 2017-11-09 15:37:10 +1100 | [diff] [blame] | 4683 | return r; |
| 4684 | } |
| 4685 | |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 4686 | static int kvmppc_run_vcpu(struct kvm_vcpu *vcpu) |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4687 | { |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 4688 | struct kvm_run *run = vcpu->run; |
Paul Mackerras | 38c53af | 2017-11-08 14:44:04 +1100 | [diff] [blame] | 4689 | int n_ceded, i, r; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4690 | struct kvmppc_vcore *vc; |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 4691 | struct kvm_vcpu *v; |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 4692 | |
Suresh E. Warrier | 3c78f78 | 2014-12-03 18:48:10 -0600 | [diff] [blame] | 4693 | trace_kvmppc_run_vcpu_enter(vcpu); |
| 4694 | |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 4695 | run->exit_reason = 0; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4696 | vcpu->arch.ret = RESUME_GUEST; |
| 4697 | vcpu->arch.trap = 0; |
Paul Mackerras | 2f12f03 | 2012-10-15 01:17:17 +0000 | [diff] [blame] | 4698 | kvmppc_update_vpas(vcpu); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4699 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4700 | /* |
| 4701 | * Synchronize with other threads in this virtual core |
| 4702 | */ |
| 4703 | vc = vcpu->arch.vcore; |
| 4704 | spin_lock(&vc->lock); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4705 | vcpu->arch.ceded = 0; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4706 | vcpu->arch.run_task = current; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 4707 | vcpu->arch.stolen_logged = vcore_stolen_time(vc, mftb()); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4708 | vcpu->arch.state = KVMPPC_VCPU_RUNNABLE; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 4709 | vcpu->arch.busy_preempt = TB_NIL; |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 4710 | WRITE_ONCE(vc->runnable_threads[vcpu->arch.ptid], vcpu); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4711 | ++vc->n_runnable; |
| 4712 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4713 | /* |
| 4714 | * This happens the first time this is called for a vcpu. |
| 4715 | * If the vcore is already running, we may be able to start |
| 4716 | * this thread straight away and have it join in. |
| 4717 | */ |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 4718 | if (!signal_pending(current)) { |
Paul Mackerras | c0093f1 | 2017-11-20 16:12:25 +1100 | [diff] [blame] | 4719 | if ((vc->vcore_state == VCORE_PIGGYBACK || |
| 4720 | vc->vcore_state == VCORE_RUNNING) && |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 4721 | !VCORE_IS_EXITING(vc)) { |
Nicholas Piggin | e4335f5 | 2022-09-08 23:25:45 +1000 | [diff] [blame] | 4722 | kvmppc_update_vpa_dispatch(vcpu, vc); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 4723 | kvmppc_start_thread(vcpu, vc); |
Suresh E. Warrier | 3c78f78 | 2014-12-03 18:48:10 -0600 | [diff] [blame] | 4724 | trace_kvm_guest_enter(vcpu); |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 4725 | } else if (vc->vcore_state == VCORE_SLEEPING) { |
Davidlohr Bueso | da4ad88 | 2020-04-23 22:48:37 -0700 | [diff] [blame] | 4726 | rcuwait_wake_up(&vc->wait); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4727 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4728 | |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 4729 | } |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4730 | |
| 4731 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
| 4732 | !signal_pending(current)) { |
Paul Mackerras | 072df81 | 2017-11-09 14:30:24 +1100 | [diff] [blame] | 4733 | /* See if the MMU is ready to go */ |
| 4734 | if (!vcpu->kvm->arch.mmu_ready) { |
Paul Mackerras | 38c53af | 2017-11-08 14:44:04 +1100 | [diff] [blame] | 4735 | spin_unlock(&vc->lock); |
Paul Mackerras | 432953b | 2017-11-09 15:37:10 +1100 | [diff] [blame] | 4736 | r = kvmhv_setup_mmu(vcpu); |
Paul Mackerras | 38c53af | 2017-11-08 14:44:04 +1100 | [diff] [blame] | 4737 | spin_lock(&vc->lock); |
| 4738 | if (r) { |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 4739 | run->exit_reason = KVM_EXIT_FAIL_ENTRY; |
| 4740 | run->fail_entry. |
Paul Mackerras | 432953b | 2017-11-09 15:37:10 +1100 | [diff] [blame] | 4741 | hardware_entry_failure_reason = 0; |
Paul Mackerras | 38c53af | 2017-11-08 14:44:04 +1100 | [diff] [blame] | 4742 | vcpu->arch.ret = r; |
| 4743 | break; |
| 4744 | } |
| 4745 | } |
| 4746 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 4747 | if (vc->vcore_state == VCORE_PREEMPT && vc->runner == NULL) |
| 4748 | kvmppc_vcore_end_preempt(vc); |
| 4749 | |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 4750 | if (vc->vcore_state != VCORE_INACTIVE) { |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 4751 | kvmppc_wait_for_exec(vc, vcpu, TASK_INTERRUPTIBLE); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4752 | continue; |
| 4753 | } |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 4754 | for_each_runnable_thread(i, v, vc) { |
Scott Wood | 7e28e60e | 2011-11-08 18:23:20 -0600 | [diff] [blame] | 4755 | kvmppc_core_prepare_to_enter(v); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4756 | if (signal_pending(v->arch.run_task)) { |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 4757 | kvmppc_remove_runnable(vc, v, mftb()); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4758 | v->stat.signal_exits++; |
Tianjia Zhang | 2610a57 | 2020-04-27 12:35:10 +0800 | [diff] [blame] | 4759 | v->run->exit_reason = KVM_EXIT_INTR; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4760 | v->arch.ret = -EINTR; |
| 4761 | wake_up(&v->arch.cpu_run); |
| 4762 | } |
| 4763 | } |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 4764 | if (!vc->n_runnable || vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
| 4765 | break; |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 4766 | n_ceded = 0; |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 4767 | for_each_runnable_thread(i, v, vc) { |
Paul Mackerras | 1da4e2f | 2017-05-19 16:26:16 +1000 | [diff] [blame] | 4768 | if (!kvmppc_vcpu_woken(v)) |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 4769 | n_ceded += v->arch.ceded; |
Paul Mackerras | 4619ac8 | 2013-04-17 20:31:41 +0000 | [diff] [blame] | 4770 | else |
| 4771 | v->arch.ceded = 0; |
| 4772 | } |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 4773 | vc->runner = vcpu; |
| 4774 | if (n_ceded == vc->n_runnable) { |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 4775 | kvmppc_vcore_blocked(vc); |
Konstantin Khlebnikov | c56dadf | 2015-07-15 12:52:03 +0300 | [diff] [blame] | 4776 | } else if (need_resched()) { |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 4777 | kvmppc_vcore_preempt(vc); |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 4778 | /* Let something else run */ |
| 4779 | cond_resched_lock(&vc->lock); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 4780 | if (vc->vcore_state == VCORE_PREEMPT) |
| 4781 | kvmppc_vcore_end_preempt(vc); |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 4782 | } else { |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 4783 | kvmppc_run_core(vc); |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 4784 | } |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 4785 | vc->runner = NULL; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4786 | } |
| 4787 | |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 4788 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
| 4789 | (vc->vcore_state == VCORE_RUNNING || |
Paul Mackerras | 5fc3e64 | 2015-09-18 13:13:44 +1000 | [diff] [blame] | 4790 | vc->vcore_state == VCORE_EXITING || |
| 4791 | vc->vcore_state == VCORE_PIGGYBACK)) |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 4792 | kvmppc_wait_for_exec(vc, vcpu, TASK_UNINTERRUPTIBLE); |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 4793 | |
Paul Mackerras | 5fc3e64 | 2015-09-18 13:13:44 +1000 | [diff] [blame] | 4794 | if (vc->vcore_state == VCORE_PREEMPT && vc->runner == NULL) |
| 4795 | kvmppc_vcore_end_preempt(vc); |
| 4796 | |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 4797 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 4798 | kvmppc_remove_runnable(vc, vcpu, mftb()); |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 4799 | vcpu->stat.signal_exits++; |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 4800 | run->exit_reason = KVM_EXIT_INTR; |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 4801 | vcpu->arch.ret = -EINTR; |
| 4802 | } |
| 4803 | |
| 4804 | if (vc->n_runnable && vc->vcore_state == VCORE_INACTIVE) { |
| 4805 | /* Wake up some vcpu to run the core */ |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 4806 | i = -1; |
| 4807 | v = next_runnable_thread(vc, &i); |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 4808 | wake_up(&v->arch.cpu_run); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4809 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4810 | |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 4811 | trace_kvmppc_run_vcpu_exit(vcpu); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 4812 | spin_unlock(&vc->lock); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 4813 | return vcpu->arch.ret; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 4814 | } |
| 4815 | |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 4816 | int kvmhv_run_single_vcpu(struct kvm_vcpu *vcpu, u64 time_limit, |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 4817 | unsigned long lpcr) |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4818 | { |
Sean Christopherson | 63fa47b | 2021-12-13 17:45:56 +0000 | [diff] [blame] | 4819 | struct rcuwait *wait = kvm_arch_vcpu_get_wait(vcpu); |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 4820 | struct kvm_run *run = vcpu->run; |
Suraj Jitindar Singh | 9d0b048 | 2018-10-08 16:31:11 +1100 | [diff] [blame] | 4821 | int trap, r, pcpu; |
Nicholas Piggin | 48013cb | 2021-05-28 19:07:32 +1000 | [diff] [blame] | 4822 | int srcu_idx; |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4823 | struct kvmppc_vcore *vc; |
| 4824 | struct kvm *kvm = vcpu->kvm; |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 4825 | struct kvm_nested_guest *nested = vcpu->arch.nested; |
Nicholas Piggin | 2251fbe | 2021-11-23 19:51:58 +1000 | [diff] [blame] | 4826 | unsigned long flags; |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 4827 | u64 tb; |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4828 | |
| 4829 | trace_kvmppc_run_vcpu_enter(vcpu); |
| 4830 | |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 4831 | run->exit_reason = 0; |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4832 | vcpu->arch.ret = RESUME_GUEST; |
| 4833 | vcpu->arch.trap = 0; |
| 4834 | |
| 4835 | vc = vcpu->arch.vcore; |
| 4836 | vcpu->arch.ceded = 0; |
| 4837 | vcpu->arch.run_task = current; |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4838 | vcpu->arch.last_inst = KVM_INST_FETCH_FAILED; |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4839 | |
| 4840 | /* See if the MMU is ready to go */ |
Nicholas Piggin | 4c9a689 | 2021-11-23 19:52:26 +1000 | [diff] [blame] | 4841 | if (unlikely(!kvm->arch.mmu_ready)) { |
Nicholas Piggin | 079a09a | 2021-05-28 19:07:50 +1000 | [diff] [blame] | 4842 | r = kvmhv_setup_mmu(vcpu); |
| 4843 | if (r) { |
| 4844 | run->exit_reason = KVM_EXIT_FAIL_ENTRY; |
| 4845 | run->fail_entry.hardware_entry_failure_reason = 0; |
| 4846 | vcpu->arch.ret = r; |
| 4847 | return r; |
| 4848 | } |
| 4849 | } |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4850 | |
| 4851 | if (need_resched()) |
| 4852 | cond_resched(); |
| 4853 | |
| 4854 | kvmppc_update_vpas(vcpu); |
| 4855 | |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4856 | preempt_disable(); |
| 4857 | pcpu = smp_processor_id(); |
Nicholas Piggin | 079a09a | 2021-05-28 19:07:50 +1000 | [diff] [blame] | 4858 | if (kvm_is_radix(kvm)) |
| 4859 | kvmppc_prepare_radix_vcpu(vcpu, pcpu); |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4860 | |
Nicholas Piggin | 2251fbe | 2021-11-23 19:51:58 +1000 | [diff] [blame] | 4861 | /* flags save not required, but irq_pmu has no disable/enable API */ |
| 4862 | powerpc_local_irq_pmu_save(flags); |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 4863 | |
Nicholas Piggin | 1a5486b | 2022-09-08 23:25:44 +1000 | [diff] [blame] | 4864 | vcpu->arch.state = KVMPPC_VCPU_RUNNABLE; |
| 4865 | |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4866 | if (signal_pending(current)) |
| 4867 | goto sigpend; |
Nicholas Piggin | 2251fbe | 2021-11-23 19:51:58 +1000 | [diff] [blame] | 4868 | if (need_resched() || !kvm->arch.mmu_ready) |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4869 | goto out; |
| 4870 | |
Nicholas Piggin | c7fa848 | 2022-03-03 15:33:10 +1000 | [diff] [blame] | 4871 | vcpu->cpu = pcpu; |
| 4872 | vcpu->arch.thread_cpu = pcpu; |
| 4873 | vc->pcpu = pcpu; |
| 4874 | local_paca->kvm_hstate.kvm_vcpu = vcpu; |
| 4875 | local_paca->kvm_hstate.ptid = 0; |
| 4876 | local_paca->kvm_hstate.fake_suspend = 0; |
| 4877 | |
| 4878 | /* |
| 4879 | * Orders set cpu/thread_cpu vs testing for pending interrupts and |
| 4880 | * doorbells below. The other side is when these fields are set vs |
| 4881 | * kvmppc_fast_vcpu_kick_hv reading the cpu/thread_cpu fields to |
| 4882 | * kick a vCPU to notice the pending interrupt. |
| 4883 | */ |
| 4884 | smp_mb(); |
| 4885 | |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 4886 | if (!nested) { |
| 4887 | kvmppc_core_prepare_to_enter(vcpu); |
Nicholas Piggin | ecd1070 | 2023-12-01 18:56:11 +0530 | [diff] [blame] | 4888 | if (test_bit(BOOK3S_IRQPRIO_EXTERNAL, |
| 4889 | &vcpu->arch.pending_exceptions) || |
| 4890 | xive_interrupt_pending(vcpu)) { |
| 4891 | /* |
| 4892 | * For nested HV, don't synthesize but always pass MER, |
| 4893 | * the L0 will be able to optimise that more |
| 4894 | * effectively than manipulating registers directly. |
| 4895 | */ |
| 4896 | if (!kvmhv_on_pseries() && (__kvmppc_get_msr_hv(vcpu) & MSR_EE)) |
Nicholas Piggin | 026728d | 2022-03-03 15:33:11 +1000 | [diff] [blame] | 4897 | kvmppc_inject_interrupt_hv(vcpu, |
Nicholas Piggin | ecd1070 | 2023-12-01 18:56:11 +0530 | [diff] [blame] | 4898 | BOOK3S_INTERRUPT_EXTERNAL, 0); |
| 4899 | else |
| 4900 | lpcr |= LPCR_MER; |
Gautam Menghani | a373830 | 2024-10-28 14:34:09 +0530 | [diff] [blame] | 4901 | } else { |
| 4902 | /* |
| 4903 | * L1's copy of L2's LPCR (vcpu->arch.vcore->lpcr) can get its MER bit |
| 4904 | * unexpectedly set - for e.g. during NMI handling when all register |
| 4905 | * states are synchronized from L0 to L1. L1 needs to inform L0 about |
| 4906 | * MER=1 only when there are pending external interrupts. |
| 4907 | * In the above if check, MER bit is set if there are pending |
| 4908 | * external interrupts. Hence, explicity mask off MER bit |
| 4909 | * here as otherwise it may generate spurious interrupts in L2 KVM |
| 4910 | * causing an endless loop, which results in L2 guest getting hung. |
| 4911 | */ |
| 4912 | lpcr &= ~LPCR_MER; |
Nicholas Piggin | 026728d | 2022-03-03 15:33:11 +1000 | [diff] [blame] | 4913 | } |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 4914 | } else if (vcpu->arch.pending_exceptions || |
| 4915 | vcpu->arch.doorbell_request || |
| 4916 | xive_interrupt_pending(vcpu)) { |
| 4917 | vcpu->arch.ret = RESUME_HOST; |
| 4918 | goto out; |
| 4919 | } |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4920 | |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 4921 | if (vcpu->arch.timer_running) { |
| 4922 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); |
| 4923 | vcpu->arch.timer_running = 0; |
| 4924 | } |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4925 | |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 4926 | tb = mftb(); |
| 4927 | |
Jordan Niethe | c8ae9b3 | 2023-09-14 13:05:54 +1000 | [diff] [blame] | 4928 | kvmppc_update_vpa_dispatch_p9(vcpu, vc, tb + kvmppc_get_tb_offset(vcpu)); |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4929 | |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4930 | trace_kvm_guest_enter(vcpu); |
| 4931 | |
Nicholas Piggin | b31bc24 | 2022-09-08 23:25:43 +1000 | [diff] [blame] | 4932 | guest_timing_enter_irqoff(); |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4933 | |
| 4934 | srcu_idx = srcu_read_lock(&kvm->srcu); |
| 4935 | |
Nicholas Piggin | b31bc24 | 2022-09-08 23:25:43 +1000 | [diff] [blame] | 4936 | guest_state_enter_irqoff(); |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4937 | this_cpu_disable_ftrace(); |
| 4938 | |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 4939 | trap = kvmhv_p9_guest_entry(vcpu, time_limit, lpcr, &tb); |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4940 | vcpu->arch.trap = trap; |
| 4941 | |
| 4942 | this_cpu_enable_ftrace(); |
Nicholas Piggin | b31bc24 | 2022-09-08 23:25:43 +1000 | [diff] [blame] | 4943 | guest_state_exit_irqoff(); |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4944 | |
| 4945 | srcu_read_unlock(&kvm->srcu, srcu_idx); |
| 4946 | |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4947 | set_irq_happened(trap); |
| 4948 | |
Nicholas Piggin | bc91c04 | 2022-09-08 23:25:41 +1000 | [diff] [blame] | 4949 | vcpu->cpu = -1; |
| 4950 | vcpu->arch.thread_cpu = -1; |
Nicholas Piggin | 1a5486b | 2022-09-08 23:25:44 +1000 | [diff] [blame] | 4951 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; |
Nicholas Piggin | bc91c04 | 2022-09-08 23:25:41 +1000 | [diff] [blame] | 4952 | |
Laurent Vivier | 235cee1 | 2021-10-28 00:21:50 +1000 | [diff] [blame] | 4953 | if (!vtime_accounting_enabled_this_cpu()) { |
Nicholas Piggin | c953f75 | 2022-09-08 23:25:42 +1000 | [diff] [blame] | 4954 | powerpc_local_irq_pmu_restore(flags); |
Laurent Vivier | 235cee1 | 2021-10-28 00:21:50 +1000 | [diff] [blame] | 4955 | /* |
Nicholas Piggin | b31bc24 | 2022-09-08 23:25:43 +1000 | [diff] [blame] | 4956 | * Service IRQs here before guest_timing_exit_irqoff() so any |
Laurent Vivier | 235cee1 | 2021-10-28 00:21:50 +1000 | [diff] [blame] | 4957 | * ticks that occurred while running the guest are accounted to |
| 4958 | * the guest. If vtime accounting is enabled, accounting uses |
| 4959 | * TB rather than ticks, so it can be done without enabling |
| 4960 | * interrupts here, which has the problem that it accounts |
| 4961 | * interrupt processing overhead to the host. |
| 4962 | */ |
Nicholas Piggin | c953f75 | 2022-09-08 23:25:42 +1000 | [diff] [blame] | 4963 | powerpc_local_irq_pmu_save(flags); |
Laurent Vivier | 235cee1 | 2021-10-28 00:21:50 +1000 | [diff] [blame] | 4964 | } |
Nicholas Piggin | b31bc24 | 2022-09-08 23:25:43 +1000 | [diff] [blame] | 4965 | guest_timing_exit_irqoff(); |
Nicholas Piggin | 112665286 | 2021-01-30 23:08:12 +1000 | [diff] [blame] | 4966 | |
Nicholas Piggin | 2251fbe | 2021-11-23 19:51:58 +1000 | [diff] [blame] | 4967 | powerpc_local_irq_pmu_restore(flags); |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4968 | |
| 4969 | preempt_enable(); |
| 4970 | |
Suraj Jitindar Singh | 3c25ab3 | 2019-06-20 11:46:51 +1000 | [diff] [blame] | 4971 | /* |
| 4972 | * cancel pending decrementer exception if DEC is now positive, or if |
| 4973 | * entering a nested guest in which case the decrementer is now owned |
| 4974 | * by L2 and the L1 decrementer is provided in hdec_expires |
| 4975 | */ |
Vaibhav Jain | 7be6ce7 | 2024-04-15 09:27:29 +0530 | [diff] [blame] | 4976 | if (kvmppc_core_pending_dec(vcpu) && |
Nicholas Piggin | cb2553a | 2021-11-23 19:52:02 +1000 | [diff] [blame] | 4977 | ((tb < kvmppc_dec_expires_host_tb(vcpu)) || |
Suraj Jitindar Singh | 3c25ab3 | 2019-06-20 11:46:51 +1000 | [diff] [blame] | 4978 | (trap == BOOK3S_INTERRUPT_SYSCALL && |
| 4979 | kvmppc_get_gpr(vcpu, 3) == H_ENTER_NESTED))) |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4980 | kvmppc_core_dequeue_dec(vcpu); |
| 4981 | |
| 4982 | trace_kvm_guest_exit(vcpu); |
| 4983 | r = RESUME_GUEST; |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 4984 | if (trap) { |
| 4985 | if (!nested) |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 4986 | r = kvmppc_handle_exit_hv(vcpu, current); |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 4987 | else |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 4988 | r = kvmppc_handle_nested_exit(vcpu); |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 4989 | } |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4990 | vcpu->arch.ret = r; |
| 4991 | |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 4992 | if (is_kvmppc_resume_guest(r) && !kvmppc_vcpu_check_block(vcpu)) { |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4993 | kvmppc_set_timer(vcpu); |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 4994 | |
Sean Christopherson | 63fa47b | 2021-12-13 17:45:56 +0000 | [diff] [blame] | 4995 | prepare_to_rcuwait(wait); |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 4996 | for (;;) { |
| 4997 | set_current_state(TASK_INTERRUPTIBLE); |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 4998 | if (signal_pending(current)) { |
| 4999 | vcpu->stat.signal_exits++; |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 5000 | run->exit_reason = KVM_EXIT_INTR; |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 5001 | vcpu->arch.ret = -EINTR; |
| 5002 | break; |
| 5003 | } |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 5004 | |
| 5005 | if (kvmppc_vcpu_check_block(vcpu)) |
| 5006 | break; |
| 5007 | |
Fabiano Rosas | ad55bae | 2022-03-28 18:58:31 -0300 | [diff] [blame] | 5008 | trace_kvmppc_vcore_blocked(vcpu, 0); |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 5009 | schedule(); |
Fabiano Rosas | ad55bae | 2022-03-28 18:58:31 -0300 | [diff] [blame] | 5010 | trace_kvmppc_vcore_blocked(vcpu, 1); |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 5011 | } |
Sean Christopherson | 63fa47b | 2021-12-13 17:45:56 +0000 | [diff] [blame] | 5012 | finish_rcuwait(wait); |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 5013 | } |
| 5014 | vcpu->arch.ceded = 0; |
| 5015 | |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 5016 | done: |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 5017 | trace_kvmppc_run_vcpu_exit(vcpu); |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 5018 | |
| 5019 | return vcpu->arch.ret; |
| 5020 | |
| 5021 | sigpend: |
| 5022 | vcpu->stat.signal_exits++; |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 5023 | run->exit_reason = KVM_EXIT_INTR; |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 5024 | vcpu->arch.ret = -EINTR; |
| 5025 | out: |
Nicholas Piggin | c7fa848 | 2022-03-03 15:33:10 +1000 | [diff] [blame] | 5026 | vcpu->cpu = -1; |
| 5027 | vcpu->arch.thread_cpu = -1; |
Nicholas Piggin | 1a5486b | 2022-09-08 23:25:44 +1000 | [diff] [blame] | 5028 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; |
Nicholas Piggin | 2251fbe | 2021-11-23 19:51:58 +1000 | [diff] [blame] | 5029 | powerpc_local_irq_pmu_restore(flags); |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 5030 | preempt_enable(); |
| 5031 | goto done; |
| 5032 | } |
| 5033 | |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 5034 | static int kvmppc_vcpu_run_hv(struct kvm_vcpu *vcpu) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 5035 | { |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 5036 | struct kvm_run *run = vcpu->run; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 5037 | int r; |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 5038 | int srcu_idx; |
Paul Mackerras | 1b151ce | 2017-09-13 15:53:48 +1000 | [diff] [blame] | 5039 | struct kvm *kvm; |
Nicholas Piggin | 34e119c9 | 2021-11-23 19:51:57 +1000 | [diff] [blame] | 5040 | unsigned long msr; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 5041 | |
Fabiano Rosas | b44bb1b | 2022-05-25 10:05:54 -0300 | [diff] [blame] | 5042 | start_timing(vcpu, &vcpu->arch.vcpu_entry); |
| 5043 | |
Alexander Graf | af8f38b | 2011-08-10 13:57:08 +0200 | [diff] [blame] | 5044 | if (!vcpu->arch.sane) { |
| 5045 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
| 5046 | return -EINVAL; |
| 5047 | } |
| 5048 | |
Nicholas Piggin | 34e119c9 | 2021-11-23 19:51:57 +1000 | [diff] [blame] | 5049 | /* No need to go into the guest when all we'll do is come back out */ |
| 5050 | if (signal_pending(current)) { |
| 5051 | run->exit_reason = KVM_EXIT_INTR; |
| 5052 | return -EINTR; |
| 5053 | } |
| 5054 | |
| 5055 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
Paul Mackerras | 46a704f | 2017-06-15 16:10:27 +1000 | [diff] [blame] | 5056 | /* |
| 5057 | * Don't allow entry with a suspended transaction, because |
| 5058 | * the guest entry/exit code will lose it. |
Paul Mackerras | 46a704f | 2017-06-15 16:10:27 +1000 | [diff] [blame] | 5059 | */ |
Paul Mackerras | 46a704f | 2017-06-15 16:10:27 +1000 | [diff] [blame] | 5060 | if (cpu_has_feature(CPU_FTR_TM) && current->thread.regs && |
| 5061 | (current->thread.regs->msr & MSR_TM)) { |
| 5062 | if (MSR_TM_ACTIVE(current->thread.regs->msr)) { |
| 5063 | run->exit_reason = KVM_EXIT_FAIL_ENTRY; |
| 5064 | run->fail_entry.hardware_entry_failure_reason = 0; |
| 5065 | return -EINVAL; |
| 5066 | } |
Paul Mackerras | 46a704f | 2017-06-15 16:10:27 +1000 | [diff] [blame] | 5067 | } |
| 5068 | #endif |
| 5069 | |
Paul Mackerras | 7aa1584 | 2018-04-20 19:53:22 +1000 | [diff] [blame] | 5070 | /* |
| 5071 | * Force online to 1 for the sake of old userspace which doesn't |
| 5072 | * set it. |
| 5073 | */ |
| 5074 | if (!vcpu->arch.online) { |
| 5075 | atomic_inc(&vcpu->arch.vcore->online_count); |
| 5076 | vcpu->arch.online = 1; |
| 5077 | } |
| 5078 | |
Scott Wood | 25051b5a | 2011-11-08 18:23:23 -0600 | [diff] [blame] | 5079 | kvmppc_core_prepare_to_enter(vcpu); |
| 5080 | |
Paul Mackerras | 1b151ce | 2017-09-13 15:53:48 +1000 | [diff] [blame] | 5081 | kvm = vcpu->kvm; |
| 5082 | atomic_inc(&kvm->arch.vcpus_running); |
| 5083 | /* Order vcpus_running vs. mmu_ready, see kvmppc_alloc_reset_hpt */ |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 5084 | smp_mb(); |
| 5085 | |
Nicholas Piggin | 34e119c9 | 2021-11-23 19:51:57 +1000 | [diff] [blame] | 5086 | msr = 0; |
| 5087 | if (IS_ENABLED(CONFIG_PPC_FPU)) |
| 5088 | msr |= MSR_FP; |
| 5089 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) |
| 5090 | msr |= MSR_VEC; |
| 5091 | if (cpu_has_feature(CPU_FTR_VSX)) |
| 5092 | msr |= MSR_VSX; |
Nicholas Piggin | 022ecb9 | 2021-11-23 19:52:15 +1000 | [diff] [blame] | 5093 | if ((cpu_has_feature(CPU_FTR_TM) || |
| 5094 | cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST)) && |
Jordan Niethe | ebc88ea | 2023-09-14 13:05:55 +1000 | [diff] [blame] | 5095 | (kvmppc_get_hfscr_hv(vcpu) & HFSCR_TM)) |
Nicholas Piggin | 34e119c9 | 2021-11-23 19:51:57 +1000 | [diff] [blame] | 5096 | msr |= MSR_TM; |
| 5097 | msr = msr_check_and_set(msr); |
Anton Blanchard | 579e633 | 2015-10-29 11:44:09 +1100 | [diff] [blame] | 5098 | |
Nicholas Piggin | 34e119c9 | 2021-11-23 19:51:57 +1000 | [diff] [blame] | 5099 | kvmppc_save_user_regs(); |
Paul Mackerras | ca8efa1 | 2017-06-06 16:47:22 +1000 | [diff] [blame] | 5100 | |
Nicholas Piggin | 5236756 | 2021-11-23 19:52:16 +1000 | [diff] [blame] | 5101 | kvmppc_save_current_sprs(); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 5102 | |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 5103 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
| 5104 | vcpu->arch.waitp = &vcpu->arch.vcore->wait; |
Leonardo Bras | 8a9c892 | 2019-11-26 19:36:30 -0300 | [diff] [blame] | 5105 | vcpu->arch.pgdir = kvm->mm->pgd; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 5106 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 5107 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 5108 | do { |
Fabiano Rosas | b44bb1b | 2022-05-25 10:05:54 -0300 | [diff] [blame] | 5109 | accumulate_time(vcpu, &vcpu->arch.guest_entry); |
Nicholas Piggin | 0bf7e1b | 2021-05-28 19:07:51 +1000 | [diff] [blame] | 5110 | if (cpu_has_feature(CPU_FTR_ARCH_300)) |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 5111 | r = kvmhv_run_single_vcpu(vcpu, ~(u64)0, |
Paul Mackerras | 360cae3 | 2018-10-08 16:31:04 +1100 | [diff] [blame] | 5112 | vcpu->arch.vcore->lpcr); |
Paul Mackerras | 95a6432 | 2018-10-08 16:30:55 +1100 | [diff] [blame] | 5113 | else |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 5114 | r = kvmppc_run_vcpu(vcpu); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 5115 | |
Nicholas Piggin | 9dc2bab | 2021-05-28 19:07:33 +1000 | [diff] [blame] | 5116 | if (run->exit_reason == KVM_EXIT_PAPR_HCALL) { |
Fabiano Rosas | b44bb1b | 2022-05-25 10:05:54 -0300 | [diff] [blame] | 5117 | accumulate_time(vcpu, &vcpu->arch.hcall); |
| 5118 | |
Jordan Niethe | 63ccae7 | 2023-12-01 18:56:08 +0530 | [diff] [blame] | 5119 | if (!kvmhv_is_nestedv2() && WARN_ON_ONCE(__kvmppc_get_msr_hv(vcpu) & MSR_PR)) { |
Nicholas Piggin | 9dc2bab | 2021-05-28 19:07:33 +1000 | [diff] [blame] | 5120 | /* |
| 5121 | * These should have been caught reflected |
| 5122 | * into the guest by now. Final sanity check: |
| 5123 | * don't allow userspace to execute hcalls in |
| 5124 | * the hypervisor. |
| 5125 | */ |
| 5126 | r = RESUME_GUEST; |
| 5127 | continue; |
| 5128 | } |
Suresh E. Warrier | 3c78f78 | 2014-12-03 18:48:10 -0600 | [diff] [blame] | 5129 | trace_kvm_hcall_enter(vcpu); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 5130 | r = kvmppc_pseries_do_hcall(vcpu); |
Suresh E. Warrier | 3c78f78 | 2014-12-03 18:48:10 -0600 | [diff] [blame] | 5131 | trace_kvm_hcall_exit(vcpu, r); |
Scott Wood | 7e28e60e | 2011-11-08 18:23:20 -0600 | [diff] [blame] | 5132 | kvmppc_core_prepare_to_enter(vcpu); |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 5133 | } else if (r == RESUME_PAGE_FAULT) { |
Fabiano Rosas | b44bb1b | 2022-05-25 10:05:54 -0300 | [diff] [blame] | 5134 | accumulate_time(vcpu, &vcpu->arch.pg_fault); |
Paul Mackerras | 432953b | 2017-11-09 15:37:10 +1100 | [diff] [blame] | 5135 | srcu_idx = srcu_read_lock(&kvm->srcu); |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 5136 | r = kvmppc_book3s_hv_page_fault(vcpu, |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 5137 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); |
Paul Mackerras | 432953b | 2017-11-09 15:37:10 +1100 | [diff] [blame] | 5138 | srcu_read_unlock(&kvm->srcu, srcu_idx); |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 5139 | } else if (r == RESUME_PASSTHROUGH) { |
Paul Mackerras | 03f9533 | 2019-02-04 22:07:20 +1100 | [diff] [blame] | 5140 | if (WARN_ON(xics_on_xive())) |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 5141 | r = H_SUCCESS; |
| 5142 | else |
| 5143 | r = kvmppc_xics_rm_complete(vcpu, 0); |
| 5144 | } |
Greg Kurz | e59d24e | 2014-02-06 17:36:56 +0100 | [diff] [blame] | 5145 | } while (is_kvmppc_resume_guest(r)); |
Fabiano Rosas | b44bb1b | 2022-05-25 10:05:54 -0300 | [diff] [blame] | 5146 | accumulate_time(vcpu, &vcpu->arch.vcpu_exit); |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 5147 | |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 5148 | vcpu->arch.state = KVMPPC_VCPU_NOTREADY; |
Paul Mackerras | 432953b | 2017-11-09 15:37:10 +1100 | [diff] [blame] | 5149 | atomic_dec(&kvm->arch.vcpus_running); |
Nicholas Piggin | 59dc5bf | 2021-06-18 01:51:03 +1000 | [diff] [blame] | 5150 | |
| 5151 | srr_regs_clobbered(); |
| 5152 | |
Fabiano Rosas | b44bb1b | 2022-05-25 10:05:54 -0300 | [diff] [blame] | 5153 | end_timing(vcpu); |
| 5154 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 5155 | return r; |
| 5156 | } |
| 5157 | |
Benjamin Herrenschmidt | 5b74716 | 2012-04-26 19:43:42 +0000 | [diff] [blame] | 5158 | static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size **sps, |
Paul Mackerras | 8dc6cca | 2017-09-11 15:29:45 +1000 | [diff] [blame] | 5159 | int shift, int sllp) |
Benjamin Herrenschmidt | 5b74716 | 2012-04-26 19:43:42 +0000 | [diff] [blame] | 5160 | { |
Paul Mackerras | 8dc6cca | 2017-09-11 15:29:45 +1000 | [diff] [blame] | 5161 | (*sps)->page_shift = shift; |
| 5162 | (*sps)->slb_enc = sllp; |
| 5163 | (*sps)->enc[0].page_shift = shift; |
| 5164 | (*sps)->enc[0].pte_enc = kvmppc_pgsize_lp_encoding(shift, shift); |
Aneesh Kumar K.V | 1f365bb | 2014-05-06 23:31:36 +0530 | [diff] [blame] | 5165 | /* |
Paul Mackerras | 8dc6cca | 2017-09-11 15:29:45 +1000 | [diff] [blame] | 5166 | * Add 16MB MPSS support (may get filtered out by userspace) |
Aneesh Kumar K.V | 1f365bb | 2014-05-06 23:31:36 +0530 | [diff] [blame] | 5167 | */ |
Paul Mackerras | 8dc6cca | 2017-09-11 15:29:45 +1000 | [diff] [blame] | 5168 | if (shift != 24) { |
| 5169 | int penc = kvmppc_pgsize_lp_encoding(shift, 24); |
| 5170 | if (penc != -1) { |
| 5171 | (*sps)->enc[1].page_shift = 24; |
| 5172 | (*sps)->enc[1].pte_enc = penc; |
| 5173 | } |
Aneesh Kumar K.V | 1f365bb | 2014-05-06 23:31:36 +0530 | [diff] [blame] | 5174 | } |
Benjamin Herrenschmidt | 5b74716 | 2012-04-26 19:43:42 +0000 | [diff] [blame] | 5175 | (*sps)++; |
| 5176 | } |
| 5177 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 5178 | static int kvm_vm_ioctl_get_smmu_info_hv(struct kvm *kvm, |
| 5179 | struct kvm_ppc_smmu_info *info) |
Benjamin Herrenschmidt | 5b74716 | 2012-04-26 19:43:42 +0000 | [diff] [blame] | 5180 | { |
| 5181 | struct kvm_ppc_one_seg_page_size *sps; |
| 5182 | |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 5183 | /* |
Paul Mackerras | e3bfed1 | 2017-08-25 19:53:39 +1000 | [diff] [blame] | 5184 | * POWER7, POWER8 and POWER9 all support 32 storage keys for data. |
| 5185 | * POWER7 doesn't support keys for instruction accesses, |
| 5186 | * POWER8 and POWER9 do. |
| 5187 | */ |
| 5188 | info->data_keys = 32; |
| 5189 | info->instr_keys = cpu_has_feature(CPU_FTR_ARCH_207S) ? 32 : 0; |
| 5190 | |
Paul Mackerras | 8dc6cca | 2017-09-11 15:29:45 +1000 | [diff] [blame] | 5191 | /* POWER7, 8 and 9 all have 1T segments and 32-entry SLB */ |
| 5192 | info->flags = KVM_PPC_PAGE_SIZES_REAL | KVM_PPC_1T_SEGMENTS; |
| 5193 | info->slb_size = 32; |
Benjamin Herrenschmidt | 5b74716 | 2012-04-26 19:43:42 +0000 | [diff] [blame] | 5194 | |
| 5195 | /* We only support these sizes for now, and no muti-size segments */ |
| 5196 | sps = &info->sps[0]; |
Paul Mackerras | 8dc6cca | 2017-09-11 15:29:45 +1000 | [diff] [blame] | 5197 | kvmppc_add_seg_page_size(&sps, 12, 0); |
| 5198 | kvmppc_add_seg_page_size(&sps, 16, SLB_VSID_L | SLB_VSID_LP_01); |
| 5199 | kvmppc_add_seg_page_size(&sps, 24, SLB_VSID_L); |
Benjamin Herrenschmidt | 5b74716 | 2012-04-26 19:43:42 +0000 | [diff] [blame] | 5200 | |
Paul Mackerras | 901f8c3 | 2018-10-08 14:24:30 +1100 | [diff] [blame] | 5201 | /* If running as a nested hypervisor, we don't support HPT guests */ |
| 5202 | if (kvmhv_on_pseries()) |
| 5203 | info->flags |= KVM_PPC_NO_HASH; |
| 5204 | |
Benjamin Herrenschmidt | 5b74716 | 2012-04-26 19:43:42 +0000 | [diff] [blame] | 5205 | return 0; |
| 5206 | } |
| 5207 | |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 5208 | /* |
| 5209 | * Get (and clear) the dirty memory log for a memory slot. |
| 5210 | */ |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 5211 | static int kvm_vm_ioctl_get_dirty_log_hv(struct kvm *kvm, |
| 5212 | struct kvm_dirty_log *log) |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 5213 | { |
Paolo Bonzini | 9f6b802 | 2015-05-17 16:20:07 +0200 | [diff] [blame] | 5214 | struct kvm_memslots *slots; |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 5215 | struct kvm_memory_slot *memslot; |
Marc Zyngier | 46808a4 | 2021-11-16 16:04:02 +0000 | [diff] [blame] | 5216 | int r; |
| 5217 | unsigned long n, i; |
Paul Mackerras | e641a31 | 2017-10-26 16:39:19 +1100 | [diff] [blame] | 5218 | unsigned long *buf, *p; |
Paul Mackerras | 8f7b79b | 2017-01-30 21:21:48 +1100 | [diff] [blame] | 5219 | struct kvm_vcpu *vcpu; |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 5220 | |
| 5221 | mutex_lock(&kvm->slots_lock); |
| 5222 | |
| 5223 | r = -EINVAL; |
Alex Williamson | bbacc0c | 2012-12-10 10:33:09 -0700 | [diff] [blame] | 5224 | if (log->slot >= KVM_USER_MEM_SLOTS) |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 5225 | goto out; |
| 5226 | |
Paolo Bonzini | 9f6b802 | 2015-05-17 16:20:07 +0200 | [diff] [blame] | 5227 | slots = kvm_memslots(kvm); |
| 5228 | memslot = id_to_memslot(slots, log->slot); |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 5229 | r = -ENOENT; |
Sean Christopherson | 0577d1a | 2020-02-18 13:07:31 -0800 | [diff] [blame] | 5230 | if (!memslot || !memslot->dirty_bitmap) |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 5231 | goto out; |
| 5232 | |
Paul Mackerras | 8f7b79b | 2017-01-30 21:21:48 +1100 | [diff] [blame] | 5233 | /* |
Paul Mackerras | e641a31 | 2017-10-26 16:39:19 +1100 | [diff] [blame] | 5234 | * Use second half of bitmap area because both HPT and radix |
| 5235 | * accumulate bits in the first half. |
Paul Mackerras | 8f7b79b | 2017-01-30 21:21:48 +1100 | [diff] [blame] | 5236 | */ |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 5237 | n = kvm_dirty_bitmap_bytes(memslot); |
Paul Mackerras | 8f7b79b | 2017-01-30 21:21:48 +1100 | [diff] [blame] | 5238 | buf = memslot->dirty_bitmap + n / sizeof(long); |
| 5239 | memset(buf, 0, n); |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 5240 | |
Paul Mackerras | 8f7b79b | 2017-01-30 21:21:48 +1100 | [diff] [blame] | 5241 | if (kvm_is_radix(kvm)) |
| 5242 | r = kvmppc_hv_get_dirty_log_radix(kvm, memslot, buf); |
| 5243 | else |
| 5244 | r = kvmppc_hv_get_dirty_log_hpt(kvm, memslot, buf); |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 5245 | if (r) |
| 5246 | goto out; |
| 5247 | |
Paul Mackerras | e641a31 | 2017-10-26 16:39:19 +1100 | [diff] [blame] | 5248 | /* |
| 5249 | * We accumulate dirty bits in the first half of the |
| 5250 | * memslot's dirty_bitmap area, for when pages are paged |
| 5251 | * out or modified by the host directly. Pick up these |
| 5252 | * bits and add them to the map. |
| 5253 | */ |
| 5254 | p = memslot->dirty_bitmap; |
| 5255 | for (i = 0; i < n / sizeof(long); ++i) |
| 5256 | buf[i] |= xchg(&p[i], 0); |
| 5257 | |
Paul Mackerras | 8f7b79b | 2017-01-30 21:21:48 +1100 | [diff] [blame] | 5258 | /* Harvest dirty bits from VPA and DTL updates */ |
| 5259 | /* Note: we never modify the SLB shadow buffer areas */ |
| 5260 | kvm_for_each_vcpu(i, vcpu, kvm) { |
| 5261 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 5262 | kvmppc_harvest_vpa_dirty(&vcpu->arch.vpa, memslot, buf); |
| 5263 | kvmppc_harvest_vpa_dirty(&vcpu->arch.dtl, memslot, buf); |
| 5264 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 5265 | } |
| 5266 | |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 5267 | r = -EFAULT; |
Paul Mackerras | 8f7b79b | 2017-01-30 21:21:48 +1100 | [diff] [blame] | 5268 | if (copy_to_user(log->dirty_bitmap, buf, n)) |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 5269 | goto out; |
| 5270 | |
| 5271 | r = 0; |
| 5272 | out: |
| 5273 | mutex_unlock(&kvm->slots_lock); |
| 5274 | return r; |
| 5275 | } |
| 5276 | |
Sean Christopherson | e96c81e | 2020-02-18 13:07:27 -0800 | [diff] [blame] | 5277 | static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot *slot) |
Paul Mackerras | a66b48c | 2012-09-11 13:27:46 +0000 | [diff] [blame] | 5278 | { |
Sean Christopherson | e96c81e | 2020-02-18 13:07:27 -0800 | [diff] [blame] | 5279 | vfree(slot->arch.rmap); |
| 5280 | slot->arch.rmap = NULL; |
Paul Mackerras | a66b48c | 2012-09-11 13:27:46 +0000 | [diff] [blame] | 5281 | } |
| 5282 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 5283 | static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm, |
Sean Christopherson | 537a17b | 2021-12-06 20:54:11 +0100 | [diff] [blame] | 5284 | const struct kvm_memory_slot *old, |
| 5285 | struct kvm_memory_slot *new, |
| 5286 | enum kvm_mr_change change) |
Paul Mackerras | a66b48c | 2012-09-11 13:27:46 +0000 | [diff] [blame] | 5287 | { |
Sean Christopherson | 82307e6 | 2020-02-18 13:07:18 -0800 | [diff] [blame] | 5288 | if (change == KVM_MR_CREATE) { |
Paolo Bonzini | 5a213b9 | 2021-12-19 15:27:21 +0100 | [diff] [blame] | 5289 | unsigned long size = array_size(new->npages, sizeof(*new->arch.rmap)); |
Alexey Kardashevskiy | 511d25d | 2021-09-01 18:45:12 +1000 | [diff] [blame] | 5290 | |
| 5291 | if ((size >> PAGE_SHIFT) > totalram_pages()) |
| 5292 | return -ENOMEM; |
| 5293 | |
Paolo Bonzini | 5a213b9 | 2021-12-19 15:27:21 +0100 | [diff] [blame] | 5294 | new->arch.rmap = vzalloc(size); |
Sean Christopherson | 537a17b | 2021-12-06 20:54:11 +0100 | [diff] [blame] | 5295 | if (!new->arch.rmap) |
Sean Christopherson | 82307e6 | 2020-02-18 13:07:18 -0800 | [diff] [blame] | 5296 | return -ENOMEM; |
Sean Christopherson | 537a17b | 2021-12-06 20:54:11 +0100 | [diff] [blame] | 5297 | } else if (change != KVM_MR_DELETE) { |
| 5298 | new->arch.rmap = old->arch.rmap; |
Sean Christopherson | 82307e6 | 2020-02-18 13:07:18 -0800 | [diff] [blame] | 5299 | } |
| 5300 | |
Paul Mackerras | a66b48c | 2012-09-11 13:27:46 +0000 | [diff] [blame] | 5301 | return 0; |
| 5302 | } |
| 5303 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 5304 | static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm, |
Sean Christopherson | 537a17b | 2021-12-06 20:54:11 +0100 | [diff] [blame] | 5305 | struct kvm_memory_slot *old, |
Bharata B Rao | f032b73 | 2018-12-12 15:15:30 +1100 | [diff] [blame] | 5306 | const struct kvm_memory_slot *new, |
| 5307 | enum kvm_mr_change change) |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 5308 | { |
Yongji Xie | a56ee9f | 2016-11-04 13:55:12 +0800 | [diff] [blame] | 5309 | /* |
Sean Christopherson | eaaaed1 | 2021-12-06 20:54:14 +0100 | [diff] [blame] | 5310 | * If we are creating or modifying a memslot, it might make |
Yongji Xie | a56ee9f | 2016-11-04 13:55:12 +0800 | [diff] [blame] | 5311 | * some address that was previously cached as emulated |
| 5312 | * MMIO be no longer emulated MMIO, so invalidate |
| 5313 | * all the caches of emulated MMIO translations. |
| 5314 | */ |
Sean Christopherson | eaaaed1 | 2021-12-06 20:54:14 +0100 | [diff] [blame] | 5315 | if (change != KVM_MR_DELETE) |
Yongji Xie | a56ee9f | 2016-11-04 13:55:12 +0800 | [diff] [blame] | 5316 | atomic64_inc(&kvm->arch.mmio_update); |
Paul Mackerras | 5af3e9d | 2018-12-12 15:17:17 +1100 | [diff] [blame] | 5317 | |
| 5318 | /* |
| 5319 | * For change == KVM_MR_MOVE or KVM_MR_DELETE, higher levels |
| 5320 | * have already called kvm_arch_flush_shadow_memslot() to |
| 5321 | * flush shadow mappings. For KVM_MR_CREATE we have no |
| 5322 | * previous mappings. So the only case to handle is |
| 5323 | * KVM_MR_FLAGS_ONLY when the KVM_MEM_LOG_DIRTY_PAGES bit |
| 5324 | * has been changed. |
| 5325 | * For radix guests, we flush on setting KVM_MEM_LOG_DIRTY_PAGES |
| 5326 | * to get rid of any THP PTEs in the partition-scoped page tables |
| 5327 | * so we can track dirtiness at the page level; we flush when |
| 5328 | * clearing KVM_MEM_LOG_DIRTY_PAGES so that we can go back to |
| 5329 | * using THP PTEs. |
| 5330 | */ |
| 5331 | if (change == KVM_MR_FLAGS_ONLY && kvm_is_radix(kvm) && |
| 5332 | ((new->flags ^ old->flags) & KVM_MEM_LOG_DIRTY_PAGES)) |
| 5333 | kvmppc_radix_flush_memslot(kvm, old); |
Bharata B Rao | c326225 | 2019-11-25 08:36:29 +0530 | [diff] [blame] | 5334 | /* |
| 5335 | * If UV hasn't yet called H_SVM_INIT_START, don't register memslots. |
| 5336 | */ |
| 5337 | if (!kvm->arch.secure_guest) |
| 5338 | return; |
| 5339 | |
| 5340 | switch (change) { |
| 5341 | case KVM_MR_CREATE: |
Laurent Dufour | a2ce720 | 2020-07-27 11:07:18 -0700 | [diff] [blame] | 5342 | /* |
| 5343 | * @TODO kvmppc_uvmem_memslot_create() can fail and |
| 5344 | * return error. Fix this. |
| 5345 | */ |
| 5346 | kvmppc_uvmem_memslot_create(kvm, new); |
Bharata B Rao | c326225 | 2019-11-25 08:36:29 +0530 | [diff] [blame] | 5347 | break; |
| 5348 | case KVM_MR_DELETE: |
Laurent Dufour | a2ce720 | 2020-07-27 11:07:18 -0700 | [diff] [blame] | 5349 | kvmppc_uvmem_memslot_delete(kvm, old); |
Bharata B Rao | c326225 | 2019-11-25 08:36:29 +0530 | [diff] [blame] | 5350 | break; |
| 5351 | default: |
| 5352 | /* TODO: Handle KVM_MR_MOVE */ |
| 5353 | break; |
| 5354 | } |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 5355 | } |
| 5356 | |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 5357 | /* |
| 5358 | * Update LPCR values in kvm->arch and in vcores. |
Paul Mackerras | 0d4ee88 | 2019-05-23 16:35:34 +1000 | [diff] [blame] | 5359 | * Caller must hold kvm->arch.mmu_setup_lock (for mutual exclusion |
| 5360 | * of kvm->arch.lpcr update). |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 5361 | */ |
| 5362 | void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr, unsigned long mask) |
| 5363 | { |
| 5364 | long int i; |
| 5365 | u32 cores_done = 0; |
| 5366 | |
| 5367 | if ((kvm->arch.lpcr & mask) == lpcr) |
| 5368 | return; |
| 5369 | |
| 5370 | kvm->arch.lpcr = (kvm->arch.lpcr & ~mask) | lpcr; |
| 5371 | |
| 5372 | for (i = 0; i < KVM_MAX_VCORES; ++i) { |
| 5373 | struct kvmppc_vcore *vc = kvm->arch.vcores[i]; |
| 5374 | if (!vc) |
| 5375 | continue; |
Nicholas Piggin | 67145ef | 2021-04-12 11:48:36 +1000 | [diff] [blame] | 5376 | |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 5377 | spin_lock(&vc->lock); |
| 5378 | vc->lpcr = (vc->lpcr & ~mask) | lpcr; |
Nicholas Piggin | 67145ef | 2021-04-12 11:48:36 +1000 | [diff] [blame] | 5379 | verify_lpcr(kvm, vc->lpcr); |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 5380 | spin_unlock(&vc->lock); |
| 5381 | if (++cores_done >= kvm->arch.online_vcores) |
| 5382 | break; |
| 5383 | } |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 5384 | |
| 5385 | if (kvmhv_is_nestedv2()) { |
| 5386 | struct kvm_vcpu *vcpu; |
| 5387 | |
| 5388 | kvm_for_each_vcpu(i, vcpu, kvm) { |
| 5389 | kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_LPCR); |
| 5390 | } |
| 5391 | } |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 5392 | } |
| 5393 | |
Paul Mackerras | ded13fc | 2017-11-22 14:38:53 +1100 | [diff] [blame] | 5394 | void kvmppc_setup_partition_table(struct kvm *kvm) |
Paul Mackerras | 7a84084 | 2016-11-16 22:25:20 +1100 | [diff] [blame] | 5395 | { |
| 5396 | unsigned long dw0, dw1; |
| 5397 | |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 5398 | if (!kvm_is_radix(kvm)) { |
| 5399 | /* PS field - page size for VRMA */ |
| 5400 | dw0 = ((kvm->arch.vrma_slb_v & SLB_VSID_L) >> 1) | |
| 5401 | ((kvm->arch.vrma_slb_v & SLB_VSID_LP) << 1); |
| 5402 | /* HTABSIZE and HTABORG fields */ |
| 5403 | dw0 |= kvm->arch.sdr1; |
Paul Mackerras | 7a84084 | 2016-11-16 22:25:20 +1100 | [diff] [blame] | 5404 | |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 5405 | /* Second dword as set by userspace */ |
| 5406 | dw1 = kvm->arch.process_table; |
| 5407 | } else { |
| 5408 | dw0 = PATB_HR | radix__get_tree_size() | |
| 5409 | __pa(kvm->arch.pgtable) | RADIX_PGD_INDEX_SIZE; |
| 5410 | dw1 = PATB_GR | kvm->arch.process_table; |
| 5411 | } |
Paul Mackerras | 8e3f5fc | 2018-10-08 16:31:03 +1100 | [diff] [blame] | 5412 | kvmhv_set_ptbl_entry(kvm->arch.lpid, dw0, dw1); |
Paul Mackerras | 7a84084 | 2016-11-16 22:25:20 +1100 | [diff] [blame] | 5413 | } |
| 5414 | |
Paul Mackerras | 1b151ce | 2017-09-13 15:53:48 +1000 | [diff] [blame] | 5415 | /* |
| 5416 | * Set up HPT (hashed page table) and RMA (real-mode area). |
Paul Mackerras | 0d4ee88 | 2019-05-23 16:35:34 +1000 | [diff] [blame] | 5417 | * Must be called with kvm->arch.mmu_setup_lock held. |
Paul Mackerras | 1b151ce | 2017-09-13 15:53:48 +1000 | [diff] [blame] | 5418 | */ |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 5419 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu) |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 5420 | { |
| 5421 | int err = 0; |
| 5422 | struct kvm *kvm = vcpu->kvm; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 5423 | unsigned long hva; |
| 5424 | struct kvm_memory_slot *memslot; |
| 5425 | struct vm_area_struct *vma; |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 5426 | unsigned long lpcr = 0, senc; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 5427 | unsigned long psize, porder; |
Paul Mackerras | 2c9097e4 | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 5428 | int srcu_idx; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 5429 | |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 5430 | /* Allocate hashed page table (if not done already) and reset it */ |
David Gibson | 3f9d4f5 | 2016-12-20 16:49:00 +1100 | [diff] [blame] | 5431 | if (!kvm->arch.hpt.virt) { |
David Gibson | aae0777 | 2016-12-20 16:49:02 +1100 | [diff] [blame] | 5432 | int order = KVM_DEFAULT_HPT_ORDER; |
| 5433 | struct kvm_hpt_info info; |
| 5434 | |
| 5435 | err = kvmppc_allocate_hpt(&info, order); |
| 5436 | /* If we get here, it means userspace didn't specify a |
| 5437 | * size explicitly. So, try successively smaller |
| 5438 | * sizes if the default failed. */ |
| 5439 | while ((err == -ENOMEM) && --order >= PPC_MIN_HPT_ORDER) |
| 5440 | err = kvmppc_allocate_hpt(&info, order); |
| 5441 | |
| 5442 | if (err < 0) { |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 5443 | pr_err("KVM: Couldn't alloc HPT\n"); |
| 5444 | goto out; |
| 5445 | } |
David Gibson | aae0777 | 2016-12-20 16:49:02 +1100 | [diff] [blame] | 5446 | |
| 5447 | kvmppc_set_hpt(kvm, &info); |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 5448 | } |
| 5449 | |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 5450 | /* Look up the memslot for guest physical address 0 */ |
Paul Mackerras | 2c9097e4 | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 5451 | srcu_idx = srcu_read_lock(&kvm->srcu); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 5452 | memslot = gfn_to_memslot(kvm, 0); |
| 5453 | |
| 5454 | /* We must have some memory at 0 by now */ |
| 5455 | err = -EINVAL; |
| 5456 | if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) |
Paul Mackerras | 2c9097e4 | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 5457 | goto out_srcu; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 5458 | |
| 5459 | /* Look up the VMA for the start of this memory slot */ |
| 5460 | hva = memslot->userspace_addr; |
Michel Lespinasse | d8ed45c | 2020-06-08 21:33:25 -0700 | [diff] [blame] | 5461 | mmap_read_lock(kvm->mm); |
Liam Howlett | 900c83f | 2021-06-28 19:39:05 -0700 | [diff] [blame] | 5462 | vma = vma_lookup(kvm->mm, hva); |
| 5463 | if (!vma || (vma->vm_flags & VM_IO)) |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 5464 | goto up_out; |
| 5465 | |
| 5466 | psize = vma_kernel_pagesize(vma); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 5467 | |
Michel Lespinasse | d8ed45c | 2020-06-08 21:33:25 -0700 | [diff] [blame] | 5468 | mmap_read_unlock(kvm->mm); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 5469 | |
Paul Mackerras | c17b98c | 2014-12-03 13:30:38 +1100 | [diff] [blame] | 5470 | /* We can handle 4k, 64k or 16M pages in the VRMA */ |
Paul Mackerras | debd574 | 2018-03-02 15:38:04 +1100 | [diff] [blame] | 5471 | if (psize >= 0x1000000) |
| 5472 | psize = 0x1000000; |
| 5473 | else if (psize >= 0x10000) |
| 5474 | psize = 0x10000; |
| 5475 | else |
| 5476 | psize = 0x1000; |
| 5477 | porder = __ilog2(psize); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 5478 | |
Paul Mackerras | c17b98c | 2014-12-03 13:30:38 +1100 | [diff] [blame] | 5479 | senc = slb_pgsize_encoding(psize); |
| 5480 | kvm->arch.vrma_slb_v = senc | SLB_VSID_B_1T | |
| 5481 | (VRMA_VSID << SLB_VSID_SHIFT_1T); |
Paul Mackerras | c17b98c | 2014-12-03 13:30:38 +1100 | [diff] [blame] | 5482 | /* Create HPTEs in the hash page table for the VRMA */ |
| 5483 | kvmppc_map_vrma(vcpu, memslot, porder); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 5484 | |
Paul Mackerras | 7a84084 | 2016-11-16 22:25:20 +1100 | [diff] [blame] | 5485 | /* Update VRMASD field in the LPCR */ |
| 5486 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) { |
| 5487 | /* the -4 is to account for senc values starting at 0x10 */ |
| 5488 | lpcr = senc << (LPCR_VRMASD_SH - 4); |
| 5489 | kvmppc_update_lpcr(kvm, lpcr, LPCR_VRMASD); |
Paul Mackerras | 7a84084 | 2016-11-16 22:25:20 +1100 | [diff] [blame] | 5490 | } |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 5491 | |
Paul Mackerras | 1b151ce | 2017-09-13 15:53:48 +1000 | [diff] [blame] | 5492 | /* Order updates to kvm->arch.lpcr etc. vs. mmu_ready */ |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 5493 | smp_wmb(); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 5494 | err = 0; |
Paul Mackerras | 2c9097e4 | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 5495 | out_srcu: |
| 5496 | srcu_read_unlock(&kvm->srcu, srcu_idx); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 5497 | out: |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 5498 | return err; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 5499 | |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 5500 | up_out: |
Michel Lespinasse | d8ed45c | 2020-06-08 21:33:25 -0700 | [diff] [blame] | 5501 | mmap_read_unlock(kvm->mm); |
Lai Jiangshan | 505d642 | 2013-03-16 00:50:49 +0800 | [diff] [blame] | 5502 | goto out_srcu; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 5503 | } |
| 5504 | |
Paul Mackerras | 0d4ee88 | 2019-05-23 16:35:34 +1000 | [diff] [blame] | 5505 | /* |
| 5506 | * Must be called with kvm->arch.mmu_setup_lock held and |
| 5507 | * mmu_ready = 0 and no vcpus running. |
| 5508 | */ |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 5509 | int kvmppc_switch_mmu_to_hpt(struct kvm *kvm) |
| 5510 | { |
Nicholas Piggin | eacc818 | 2021-11-23 19:51:46 +1000 | [diff] [blame] | 5511 | unsigned long lpcr, lpcr_mask; |
| 5512 | |
Paul Mackerras | aa069a9 | 2018-09-21 20:02:01 +1000 | [diff] [blame] | 5513 | if (nesting_enabled(kvm)) |
Paul Mackerras | 8e3f5fc | 2018-10-08 16:31:03 +1100 | [diff] [blame] | 5514 | kvmhv_release_all_nested(kvm); |
Paul Mackerras | 234ff0b | 2018-11-16 21:28:18 +1100 | [diff] [blame] | 5515 | kvmppc_rmap_reset(kvm); |
| 5516 | kvm->arch.process_table = 0; |
Sean Christopherson | b1c5356 | 2021-04-01 17:56:53 -0700 | [diff] [blame] | 5517 | /* Mutual exclusion with kvm_unmap_gfn_range etc. */ |
Paul Mackerras | 234ff0b | 2018-11-16 21:28:18 +1100 | [diff] [blame] | 5518 | spin_lock(&kvm->mmu_lock); |
| 5519 | kvm->arch.radix = 0; |
| 5520 | spin_unlock(&kvm->mmu_lock); |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 5521 | kvmppc_free_radix(kvm); |
Nicholas Piggin | eacc818 | 2021-11-23 19:51:46 +1000 | [diff] [blame] | 5522 | |
| 5523 | lpcr = LPCR_VPM1; |
| 5524 | lpcr_mask = LPCR_VPM1 | LPCR_UPRT | LPCR_GTSE | LPCR_HR; |
| 5525 | if (cpu_has_feature(CPU_FTR_ARCH_31)) |
| 5526 | lpcr_mask |= LPCR_HAIL; |
| 5527 | kvmppc_update_lpcr(kvm, lpcr, lpcr_mask); |
| 5528 | |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 5529 | return 0; |
| 5530 | } |
| 5531 | |
Paul Mackerras | 0d4ee88 | 2019-05-23 16:35:34 +1000 | [diff] [blame] | 5532 | /* |
| 5533 | * Must be called with kvm->arch.mmu_setup_lock held and |
| 5534 | * mmu_ready = 0 and no vcpus running. |
| 5535 | */ |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 5536 | int kvmppc_switch_mmu_to_radix(struct kvm *kvm) |
| 5537 | { |
Nicholas Piggin | eacc818 | 2021-11-23 19:51:46 +1000 | [diff] [blame] | 5538 | unsigned long lpcr, lpcr_mask; |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 5539 | int err; |
| 5540 | |
| 5541 | err = kvmppc_init_vm_radix(kvm); |
| 5542 | if (err) |
| 5543 | return err; |
Paul Mackerras | 234ff0b | 2018-11-16 21:28:18 +1100 | [diff] [blame] | 5544 | kvmppc_rmap_reset(kvm); |
Sean Christopherson | b1c5356 | 2021-04-01 17:56:53 -0700 | [diff] [blame] | 5545 | /* Mutual exclusion with kvm_unmap_gfn_range etc. */ |
Paul Mackerras | 234ff0b | 2018-11-16 21:28:18 +1100 | [diff] [blame] | 5546 | spin_lock(&kvm->mmu_lock); |
| 5547 | kvm->arch.radix = 1; |
| 5548 | spin_unlock(&kvm->mmu_lock); |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 5549 | kvmppc_free_hpt(&kvm->arch.hpt); |
Nicholas Piggin | eacc818 | 2021-11-23 19:51:46 +1000 | [diff] [blame] | 5550 | |
| 5551 | lpcr = LPCR_UPRT | LPCR_GTSE | LPCR_HR; |
| 5552 | lpcr_mask = LPCR_VPM1 | LPCR_UPRT | LPCR_GTSE | LPCR_HR; |
| 5553 | if (cpu_has_feature(CPU_FTR_ARCH_31)) { |
| 5554 | lpcr_mask |= LPCR_HAIL; |
| 5555 | if (cpu_has_feature(CPU_FTR_HVMODE) && |
| 5556 | (kvm->arch.host_lpcr & LPCR_HAIL)) |
| 5557 | lpcr |= LPCR_HAIL; |
| 5558 | } |
| 5559 | kvmppc_update_lpcr(kvm, lpcr, lpcr_mask); |
| 5560 | |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 5561 | return 0; |
| 5562 | } |
| 5563 | |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 5564 | #ifdef CONFIG_KVM_XICS |
| 5565 | /* |
| 5566 | * Allocate a per-core structure for managing state about which cores are |
| 5567 | * running in the host versus the guest and for exchanging data between |
| 5568 | * real mode KVM and CPU running in the host. |
| 5569 | * This is only done for the first VM. |
| 5570 | * The allocated structure stays even if all VMs have stopped. |
| 5571 | * It is only freed when the kvm-hv module is unloaded. |
| 5572 | * It's OK for this routine to fail, we just don't support host |
| 5573 | * core operations like redirecting H_IPI wakeups. |
| 5574 | */ |
| 5575 | void kvmppc_alloc_host_rm_ops(void) |
| 5576 | { |
| 5577 | struct kvmppc_host_rm_ops *ops; |
| 5578 | unsigned long l_ops; |
| 5579 | int cpu, core; |
| 5580 | int size; |
| 5581 | |
Nicholas Piggin | ecb6a72 | 2021-11-23 19:52:28 +1000 | [diff] [blame] | 5582 | if (cpu_has_feature(CPU_FTR_ARCH_300)) |
| 5583 | return; |
| 5584 | |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 5585 | /* Not the first time here ? */ |
| 5586 | if (kvmppc_host_rm_ops_hv != NULL) |
| 5587 | return; |
| 5588 | |
| 5589 | ops = kzalloc(sizeof(struct kvmppc_host_rm_ops), GFP_KERNEL); |
| 5590 | if (!ops) |
| 5591 | return; |
| 5592 | |
| 5593 | size = cpu_nr_cores() * sizeof(struct kvmppc_host_rm_core); |
| 5594 | ops->rm_core = kzalloc(size, GFP_KERNEL); |
| 5595 | |
| 5596 | if (!ops->rm_core) { |
| 5597 | kfree(ops); |
| 5598 | return; |
| 5599 | } |
| 5600 | |
Sebastian Andrzej Siewior | 419af25f | 2017-05-24 10:15:21 +0200 | [diff] [blame] | 5601 | cpus_read_lock(); |
Suresh Warrier | 6f3bb80 | 2015-12-17 14:59:08 -0600 | [diff] [blame] | 5602 | |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 5603 | for (cpu = 0; cpu < nr_cpu_ids; cpu += threads_per_core) { |
| 5604 | if (!cpu_online(cpu)) |
| 5605 | continue; |
| 5606 | |
| 5607 | core = cpu >> threads_shift; |
| 5608 | ops->rm_core[core].rm_state.in_host = 1; |
| 5609 | } |
| 5610 | |
Suresh Warrier | 0c2a660 | 2015-12-17 14:59:09 -0600 | [diff] [blame] | 5611 | ops->vcpu_kick = kvmppc_fast_vcpu_kick_hv; |
| 5612 | |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 5613 | /* |
| 5614 | * Make the contents of the kvmppc_host_rm_ops structure visible |
| 5615 | * to other CPUs before we assign it to the global variable. |
| 5616 | * Do an atomic assignment (no locks used here), but if someone |
| 5617 | * beats us to it, just free our copy and return. |
| 5618 | */ |
| 5619 | smp_wmb(); |
| 5620 | l_ops = (unsigned long) ops; |
| 5621 | |
| 5622 | if (cmpxchg64((unsigned long *)&kvmppc_host_rm_ops_hv, 0, l_ops)) { |
Sebastian Andrzej Siewior | 419af25f | 2017-05-24 10:15:21 +0200 | [diff] [blame] | 5623 | cpus_read_unlock(); |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 5624 | kfree(ops->rm_core); |
| 5625 | kfree(ops); |
Suresh Warrier | 6f3bb80 | 2015-12-17 14:59:08 -0600 | [diff] [blame] | 5626 | return; |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 5627 | } |
Suresh Warrier | 6f3bb80 | 2015-12-17 14:59:08 -0600 | [diff] [blame] | 5628 | |
Sebastian Andrzej Siewior | 419af25f | 2017-05-24 10:15:21 +0200 | [diff] [blame] | 5629 | cpuhp_setup_state_nocalls_cpuslocked(CPUHP_KVM_PPC_BOOK3S_PREPARE, |
| 5630 | "ppc/kvm_book3s:prepare", |
| 5631 | kvmppc_set_host_core, |
| 5632 | kvmppc_clear_host_core); |
| 5633 | cpus_read_unlock(); |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 5634 | } |
| 5635 | |
| 5636 | void kvmppc_free_host_rm_ops(void) |
| 5637 | { |
| 5638 | if (kvmppc_host_rm_ops_hv) { |
Anna-Maria Gleixner | 3f7cd91 | 2016-11-27 00:13:45 +0100 | [diff] [blame] | 5639 | cpuhp_remove_state_nocalls(CPUHP_KVM_PPC_BOOK3S_PREPARE); |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 5640 | kfree(kvmppc_host_rm_ops_hv->rm_core); |
| 5641 | kfree(kvmppc_host_rm_ops_hv); |
| 5642 | kvmppc_host_rm_ops_hv = NULL; |
| 5643 | } |
| 5644 | } |
| 5645 | #endif |
| 5646 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 5647 | static int kvmppc_core_init_vm_hv(struct kvm *kvm) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 5648 | { |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 5649 | unsigned long lpcr, lpid; |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 5650 | int ret; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 5651 | |
Bharata B Rao | ca9f494 | 2019-11-25 08:36:26 +0530 | [diff] [blame] | 5652 | mutex_init(&kvm->arch.uvmem_lock); |
| 5653 | INIT_LIST_HEAD(&kvm->arch.uvmem_pfns); |
Paul Mackerras | 0d4ee88 | 2019-05-23 16:35:34 +1000 | [diff] [blame] | 5654 | mutex_init(&kvm->arch.mmu_setup_lock); |
| 5655 | |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 5656 | /* Allocate the guest's logical partition ID */ |
| 5657 | |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 5658 | if (!kvmhv_is_nestedv2()) { |
| 5659 | lpid = kvmppc_alloc_lpid(); |
| 5660 | if ((long)lpid < 0) |
| 5661 | return -ENOMEM; |
| 5662 | kvm->arch.lpid = lpid; |
| 5663 | } |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 5664 | |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 5665 | kvmppc_alloc_host_rm_ops(); |
| 5666 | |
Paul Mackerras | 8e3f5fc | 2018-10-08 16:31:03 +1100 | [diff] [blame] | 5667 | kvmhv_vm_nested_init(kvm); |
| 5668 | |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 5669 | if (kvmhv_is_nestedv2()) { |
| 5670 | long rc; |
| 5671 | unsigned long guest_id; |
| 5672 | |
| 5673 | rc = plpar_guest_create(0, &guest_id); |
| 5674 | |
| 5675 | if (rc != H_SUCCESS) |
| 5676 | pr_err("KVM: Create Guest hcall failed, rc=%ld\n", rc); |
| 5677 | |
| 5678 | switch (rc) { |
| 5679 | case H_PARAMETER: |
| 5680 | case H_FUNCTION: |
| 5681 | case H_STATE: |
| 5682 | return -EINVAL; |
| 5683 | case H_NOT_ENOUGH_RESOURCES: |
| 5684 | case H_ABORTED: |
| 5685 | return -ENOMEM; |
| 5686 | case H_AUTHORITY: |
| 5687 | return -EPERM; |
| 5688 | case H_NOT_AVAILABLE: |
| 5689 | return -EBUSY; |
| 5690 | } |
| 5691 | kvm->arch.lpid = guest_id; |
| 5692 | } |
| 5693 | |
| 5694 | |
Paul Mackerras | 1b400ba | 2012-11-21 23:28:08 +0000 | [diff] [blame] | 5695 | /* |
| 5696 | * Since we don't flush the TLB when tearing down a VM, |
| 5697 | * and this lpid might have previously been used, |
| 5698 | * make sure we flush on each core before running the new VM. |
Paul Mackerras | 7c5b06c | 2016-11-18 08:28:51 +1100 | [diff] [blame] | 5699 | * On POWER9, the tlbie in mmu_partition_table_set_entry() |
| 5700 | * does this flush for us. |
Paul Mackerras | 1b400ba | 2012-11-21 23:28:08 +0000 | [diff] [blame] | 5701 | */ |
Paul Mackerras | 7c5b06c | 2016-11-18 08:28:51 +1100 | [diff] [blame] | 5702 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
| 5703 | cpumask_setall(&kvm->arch.need_tlb_flush); |
Paul Mackerras | 1b400ba | 2012-11-21 23:28:08 +0000 | [diff] [blame] | 5704 | |
Paul Mackerras | 699a0ea | 2014-06-02 11:02:59 +1000 | [diff] [blame] | 5705 | /* Start out with the default set of hcalls enabled */ |
| 5706 | memcpy(kvm->arch.enabled_hcalls, default_enabled_hcalls, |
| 5707 | sizeof(kvm->arch.enabled_hcalls)); |
| 5708 | |
Paul Mackerras | 7a84084 | 2016-11-16 22:25:20 +1100 | [diff] [blame] | 5709 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
| 5710 | kvm->arch.host_sdr1 = mfspr(SPRN_SDR1); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 5711 | |
Paul Mackerras | c17b98c | 2014-12-03 13:30:38 +1100 | [diff] [blame] | 5712 | /* Init LPCR for virtual RMA mode */ |
Paul Mackerras | f3c99f9 | 2018-10-08 16:31:12 +1100 | [diff] [blame] | 5713 | if (cpu_has_feature(CPU_FTR_HVMODE)) { |
| 5714 | kvm->arch.host_lpid = mfspr(SPRN_LPID); |
| 5715 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR); |
| 5716 | lpcr &= LPCR_PECE | LPCR_LPES; |
| 5717 | } else { |
Nicholas Piggin | 2852ebf | 2022-03-03 15:33:15 +1000 | [diff] [blame] | 5718 | /* |
| 5719 | * The L2 LPES mode will be set by the L0 according to whether |
| 5720 | * or not it needs to take external interrupts in HV mode. |
| 5721 | */ |
Paul Mackerras | f3c99f9 | 2018-10-08 16:31:12 +1100 | [diff] [blame] | 5722 | lpcr = 0; |
| 5723 | } |
Paul Mackerras | c17b98c | 2014-12-03 13:30:38 +1100 | [diff] [blame] | 5724 | lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE | |
| 5725 | LPCR_VPM0 | LPCR_VPM1; |
| 5726 | kvm->arch.vrma_slb_v = SLB_VSID_B_1T | |
| 5727 | (VRMA_VSID << SLB_VSID_SHIFT_1T); |
| 5728 | /* On POWER8 turn on online bit to enable PURR/SPURR */ |
| 5729 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) |
| 5730 | lpcr |= LPCR_ONL; |
Paul Mackerras | 84f7139 | 2016-11-22 14:30:14 +1100 | [diff] [blame] | 5731 | /* |
| 5732 | * On POWER9, VPM0 bit is reserved (VPM0=1 behaviour is assumed) |
| 5733 | * Set HVICE bit to enable hypervisor virtualization interrupts. |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 5734 | * Set HEIC to prevent OS interrupts to go to hypervisor (should |
| 5735 | * be unnecessary but better safe than sorry in case we re-enable |
| 5736 | * EE in HV mode with this LPCR still set) |
Paul Mackerras | 84f7139 | 2016-11-22 14:30:14 +1100 | [diff] [blame] | 5737 | */ |
| 5738 | if (cpu_has_feature(CPU_FTR_ARCH_300)) { |
Paul Mackerras | 7a84084 | 2016-11-16 22:25:20 +1100 | [diff] [blame] | 5739 | lpcr &= ~LPCR_VPM0; |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 5740 | lpcr |= LPCR_HVICE | LPCR_HEIC; |
| 5741 | |
| 5742 | /* |
| 5743 | * If xive is enabled, we route 0x500 interrupts directly |
| 5744 | * to the guest. |
| 5745 | */ |
Paul Mackerras | 03f9533 | 2019-02-04 22:07:20 +1100 | [diff] [blame] | 5746 | if (xics_on_xive()) |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 5747 | lpcr |= LPCR_LPES; |
Paul Mackerras | 84f7139 | 2016-11-22 14:30:14 +1100 | [diff] [blame] | 5748 | } |
| 5749 | |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 5750 | /* |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 5751 | * If the host uses radix, the guest starts out as radix. |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 5752 | */ |
| 5753 | if (radix_enabled()) { |
| 5754 | kvm->arch.radix = 1; |
Paul Mackerras | 1b151ce | 2017-09-13 15:53:48 +1000 | [diff] [blame] | 5755 | kvm->arch.mmu_ready = 1; |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 5756 | lpcr &= ~LPCR_VPM1; |
| 5757 | lpcr |= LPCR_UPRT | LPCR_GTSE | LPCR_HR; |
Nicholas Piggin | eacc818 | 2021-11-23 19:51:46 +1000 | [diff] [blame] | 5758 | if (cpu_has_feature(CPU_FTR_HVMODE) && |
| 5759 | cpu_has_feature(CPU_FTR_ARCH_31) && |
| 5760 | (kvm->arch.host_lpcr & LPCR_HAIL)) |
| 5761 | lpcr |= LPCR_HAIL; |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 5762 | ret = kvmppc_init_vm_radix(kvm); |
| 5763 | if (ret) { |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 5764 | if (kvmhv_is_nestedv2()) |
| 5765 | plpar_guest_delete(0, kvm->arch.lpid); |
| 5766 | else |
| 5767 | kvmppc_free_lpid(kvm->arch.lpid); |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 5768 | return ret; |
| 5769 | } |
| 5770 | kvmppc_setup_partition_table(kvm); |
| 5771 | } |
| 5772 | |
Nicholas Piggin | 67145ef | 2021-04-12 11:48:36 +1000 | [diff] [blame] | 5773 | verify_lpcr(kvm, lpcr); |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 5774 | kvm->arch.lpcr = lpcr; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 5775 | |
David Gibson | 5e98596 | 2016-12-20 16:49:05 +1100 | [diff] [blame] | 5776 | /* Initialization for future HPT resizes */ |
| 5777 | kvm->arch.resize_hpt = NULL; |
| 5778 | |
Paul Mackerras | 512691d | 2012-10-15 01:15:41 +0000 | [diff] [blame] | 5779 | /* |
Paul Mackerras | 7c5b06c | 2016-11-18 08:28:51 +1100 | [diff] [blame] | 5780 | * Work out how many sets the TLB has, for the use of |
| 5781 | * the TLB invalidation loop in book3s_hv_rmhandlers.S. |
| 5782 | */ |
Aneesh Kumar K.V | e806394 | 2020-10-07 11:03:05 +0530 | [diff] [blame] | 5783 | if (cpu_has_feature(CPU_FTR_ARCH_31)) { |
| 5784 | /* |
| 5785 | * P10 will flush all the congruence class with a single tlbiel |
| 5786 | */ |
| 5787 | kvm->arch.tlb_sets = 1; |
| 5788 | } else if (radix_enabled()) |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 5789 | kvm->arch.tlb_sets = POWER9_TLB_SETS_RADIX; /* 128 */ |
| 5790 | else if (cpu_has_feature(CPU_FTR_ARCH_300)) |
Paul Mackerras | 7c5b06c | 2016-11-18 08:28:51 +1100 | [diff] [blame] | 5791 | kvm->arch.tlb_sets = POWER9_TLB_SETS_HASH; /* 256 */ |
| 5792 | else if (cpu_has_feature(CPU_FTR_ARCH_207S)) |
| 5793 | kvm->arch.tlb_sets = POWER8_TLB_SETS; /* 512 */ |
| 5794 | else |
| 5795 | kvm->arch.tlb_sets = POWER7_TLB_SETS; /* 128 */ |
| 5796 | |
| 5797 | /* |
Michael Ellerman | 441c19c | 2014-05-23 18:15:25 +1000 | [diff] [blame] | 5798 | * Track that we now have a HV mode VM active. This blocks secondary |
| 5799 | * CPU threads from coming online. |
Paul Mackerras | 512691d | 2012-10-15 01:15:41 +0000 | [diff] [blame] | 5800 | */ |
Nicholas Piggin | aaae8c7 | 2021-05-28 19:07:42 +1000 | [diff] [blame] | 5801 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 5802 | kvm_hv_vm_activated(); |
Paul Mackerras | 512691d | 2012-10-15 01:15:41 +0000 | [diff] [blame] | 5803 | |
Paul Mackerras | e23a808 | 2015-03-28 14:21:01 +1100 | [diff] [blame] | 5804 | /* |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 5805 | * Initialize smt_mode depending on processor. |
| 5806 | * POWER8 and earlier have to use "strict" threading, where |
| 5807 | * all vCPUs in a vcore have to run on the same (sub)core, |
| 5808 | * whereas on POWER9 the threads can each run a different |
| 5809 | * guest. |
| 5810 | */ |
| 5811 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
| 5812 | kvm->arch.smt_mode = threads_per_subcore; |
| 5813 | else |
| 5814 | kvm->arch.smt_mode = 1; |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 5815 | kvm->arch.emul_smt_mode = 1; |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 5816 | |
Alexey Kardashevskiy | faf01ae | 2022-01-11 11:54:04 +1100 | [diff] [blame] | 5817 | return 0; |
| 5818 | } |
| 5819 | |
| 5820 | static int kvmppc_arch_create_vm_debugfs_hv(struct kvm *kvm) |
| 5821 | { |
Greg Kroah-Hartman | 929f45e | 2018-05-29 18:22:04 +0200 | [diff] [blame] | 5822 | kvmppc_mmu_debugfs_init(kvm); |
Paul Mackerras | 9a94d3e | 2018-10-08 16:30:57 +1100 | [diff] [blame] | 5823 | if (radix_enabled()) |
| 5824 | kvmhv_radix_debugfs_init(kvm); |
David Gibson | 54738c0 | 2011-06-29 00:22:41 +0000 | [diff] [blame] | 5825 | return 0; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 5826 | } |
| 5827 | |
Paul Mackerras | f1378b1 | 2013-09-27 15:33:43 +0530 | [diff] [blame] | 5828 | static void kvmppc_free_vcores(struct kvm *kvm) |
| 5829 | { |
| 5830 | long int i; |
| 5831 | |
Paul Mackerras | 2331631 | 2015-10-21 16:03:14 +1100 | [diff] [blame] | 5832 | for (i = 0; i < KVM_MAX_VCORES; ++i) |
Paul Mackerras | f1378b1 | 2013-09-27 15:33:43 +0530 | [diff] [blame] | 5833 | kfree(kvm->arch.vcores[i]); |
| 5834 | kvm->arch.online_vcores = 0; |
| 5835 | } |
| 5836 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 5837 | static void kvmppc_core_destroy_vm_hv(struct kvm *kvm) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 5838 | { |
Nicholas Piggin | aaae8c7 | 2021-05-28 19:07:42 +1000 | [diff] [blame] | 5839 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 5840 | kvm_hv_vm_deactivated(); |
Paul Mackerras | 512691d | 2012-10-15 01:15:41 +0000 | [diff] [blame] | 5841 | |
Paul Mackerras | f1378b1 | 2013-09-27 15:33:43 +0530 | [diff] [blame] | 5842 | kvmppc_free_vcores(kvm); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 5843 | |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 5844 | |
Paul Mackerras | 5a31935 | 2017-01-30 21:21:46 +1100 | [diff] [blame] | 5845 | if (kvm_is_radix(kvm)) |
| 5846 | kvmppc_free_radix(kvm); |
| 5847 | else |
David Gibson | aae0777 | 2016-12-20 16:49:02 +1100 | [diff] [blame] | 5848 | kvmppc_free_hpt(&kvm->arch.hpt); |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 5849 | |
Suraj Jitindar Singh | 89329c0 | 2018-10-08 16:30:59 +1100 | [diff] [blame] | 5850 | /* Perform global invalidation and return lpid to the pool */ |
| 5851 | if (cpu_has_feature(CPU_FTR_ARCH_300)) { |
Paul Mackerras | aa069a9 | 2018-09-21 20:02:01 +1000 | [diff] [blame] | 5852 | if (nesting_enabled(kvm)) |
Paul Mackerras | 8e3f5fc | 2018-10-08 16:31:03 +1100 | [diff] [blame] | 5853 | kvmhv_release_all_nested(kvm); |
Suraj Jitindar Singh | 89329c0 | 2018-10-08 16:30:59 +1100 | [diff] [blame] | 5854 | kvm->arch.process_table = 0; |
Paul Mackerras | d89c69f | 2019-12-18 11:43:06 +1100 | [diff] [blame] | 5855 | if (kvm->arch.secure_guest) |
| 5856 | uv_svm_terminate(kvm->arch.lpid); |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 5857 | if (!kvmhv_is_nestedv2()) |
| 5858 | kvmhv_set_ptbl_entry(kvm->arch.lpid, 0, 0); |
Suraj Jitindar Singh | 89329c0 | 2018-10-08 16:30:59 +1100 | [diff] [blame] | 5859 | } |
Bharata B Rao | ca9f494 | 2019-11-25 08:36:26 +0530 | [diff] [blame] | 5860 | |
Jordan Niethe | 7d370e1 | 2023-12-01 18:56:06 +0530 | [diff] [blame] | 5861 | if (kvmhv_is_nestedv2()) { |
| 5862 | kvmhv_flush_lpid(kvm->arch.lpid); |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 5863 | plpar_guest_delete(0, kvm->arch.lpid); |
Jordan Niethe | 7d370e1 | 2023-12-01 18:56:06 +0530 | [diff] [blame] | 5864 | } else { |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 5865 | kvmppc_free_lpid(kvm->arch.lpid); |
Jordan Niethe | 7d370e1 | 2023-12-01 18:56:06 +0530 | [diff] [blame] | 5866 | } |
Suraj Jitindar Singh | 89329c0 | 2018-10-08 16:30:59 +1100 | [diff] [blame] | 5867 | |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 5868 | kvmppc_free_pimap(kvm); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 5869 | } |
| 5870 | |
| 5871 | /* We don't need to emulate any privileged instructions or dcbz */ |
Tianjia Zhang | 8c99d34 | 2020-04-27 12:35:11 +0800 | [diff] [blame] | 5872 | static int kvmppc_core_emulate_op_hv(struct kvm_vcpu *vcpu, |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 5873 | unsigned int inst, int *advance) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 5874 | { |
| 5875 | return EMULATE_FAIL; |
| 5876 | } |
| 5877 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 5878 | static int kvmppc_core_emulate_mtspr_hv(struct kvm_vcpu *vcpu, int sprn, |
| 5879 | ulong spr_val) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 5880 | { |
| 5881 | return EMULATE_FAIL; |
| 5882 | } |
| 5883 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 5884 | static int kvmppc_core_emulate_mfspr_hv(struct kvm_vcpu *vcpu, int sprn, |
| 5885 | ulong *spr_val) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 5886 | { |
| 5887 | return EMULATE_FAIL; |
| 5888 | } |
| 5889 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 5890 | static int kvmppc_core_check_processor_compat_hv(void) |
| 5891 | { |
Paul Mackerras | de760db | 2018-10-08 16:31:16 +1100 | [diff] [blame] | 5892 | if (cpu_has_feature(CPU_FTR_HVMODE) && |
| 5893 | cpu_has_feature(CPU_FTR_ARCH_206)) |
| 5894 | return 0; |
Aneesh Kumar K.V | 50de596 | 2016-04-29 23:25:43 +1000 | [diff] [blame] | 5895 | |
Paul Mackerras | de760db | 2018-10-08 16:31:16 +1100 | [diff] [blame] | 5896 | /* POWER9 in radix mode is capable of being a nested hypervisor. */ |
| 5897 | if (cpu_has_feature(CPU_FTR_ARCH_300) && radix_enabled()) |
| 5898 | return 0; |
| 5899 | |
| 5900 | return -EIO; |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 5901 | } |
| 5902 | |
Suresh Warrier | 8daaafc | 2016-08-19 15:35:48 +1000 | [diff] [blame] | 5903 | #ifdef CONFIG_KVM_XICS |
| 5904 | |
| 5905 | void kvmppc_free_pimap(struct kvm *kvm) |
| 5906 | { |
| 5907 | kfree(kvm->arch.pimap); |
| 5908 | } |
| 5909 | |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 5910 | static struct kvmppc_passthru_irqmap *kvmppc_alloc_pimap(void) |
Suresh Warrier | 8daaafc | 2016-08-19 15:35:48 +1000 | [diff] [blame] | 5911 | { |
| 5912 | return kzalloc(sizeof(struct kvmppc_passthru_irqmap), GFP_KERNEL); |
| 5913 | } |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 5914 | |
| 5915 | static int kvmppc_set_passthru_irq(struct kvm *kvm, int host_irq, int guest_gsi) |
| 5916 | { |
| 5917 | struct irq_desc *desc; |
| 5918 | struct kvmppc_irq_map *irq_map; |
| 5919 | struct kvmppc_passthru_irqmap *pimap; |
| 5920 | struct irq_chip *chip; |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 5921 | int i, rc = 0; |
Cédric Le Goater | 1753081 | 2021-07-01 15:27:48 +0200 | [diff] [blame] | 5922 | struct irq_data *host_data; |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 5923 | |
Suresh Warrier | 644abbb | 2016-08-19 15:35:54 +1000 | [diff] [blame] | 5924 | if (!kvm_irq_bypass) |
| 5925 | return 1; |
| 5926 | |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 5927 | desc = irq_to_desc(host_irq); |
| 5928 | if (!desc) |
| 5929 | return -EIO; |
| 5930 | |
| 5931 | mutex_lock(&kvm->lock); |
| 5932 | |
| 5933 | pimap = kvm->arch.pimap; |
| 5934 | if (pimap == NULL) { |
| 5935 | /* First call, allocate structure to hold IRQ map */ |
| 5936 | pimap = kvmppc_alloc_pimap(); |
| 5937 | if (pimap == NULL) { |
| 5938 | mutex_unlock(&kvm->lock); |
| 5939 | return -ENOMEM; |
| 5940 | } |
| 5941 | kvm->arch.pimap = pimap; |
| 5942 | } |
| 5943 | |
| 5944 | /* |
| 5945 | * For now, we only support interrupts for which the EOI operation |
| 5946 | * is an OPAL call followed by a write to XIRR, since that's |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 5947 | * what our real-mode EOI code does, or a XIVE interrupt |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 5948 | */ |
| 5949 | chip = irq_data_get_irq_chip(&desc->irq_data); |
Cédric Le Goater | ba418a0 | 2021-07-01 15:27:31 +0200 | [diff] [blame] | 5950 | if (!chip || !is_pnv_opal_msi(chip)) { |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 5951 | pr_warn("kvmppc_set_passthru_irq_hv: Could not assign IRQ map for (%d,%d)\n", |
| 5952 | host_irq, guest_gsi); |
| 5953 | mutex_unlock(&kvm->lock); |
| 5954 | return -ENOENT; |
| 5955 | } |
| 5956 | |
| 5957 | /* |
| 5958 | * See if we already have an entry for this guest IRQ number. |
| 5959 | * If it's mapped to a hardware IRQ number, that's an error, |
| 5960 | * otherwise re-use this entry. |
| 5961 | */ |
| 5962 | for (i = 0; i < pimap->n_mapped; i++) { |
| 5963 | if (guest_gsi == pimap->mapped[i].v_hwirq) { |
| 5964 | if (pimap->mapped[i].r_hwirq) { |
| 5965 | mutex_unlock(&kvm->lock); |
| 5966 | return -EINVAL; |
| 5967 | } |
| 5968 | break; |
| 5969 | } |
| 5970 | } |
| 5971 | |
| 5972 | if (i == KVMPPC_PIRQ_MAPPED) { |
| 5973 | mutex_unlock(&kvm->lock); |
| 5974 | return -EAGAIN; /* table is full */ |
| 5975 | } |
| 5976 | |
| 5977 | irq_map = &pimap->mapped[i]; |
| 5978 | |
| 5979 | irq_map->v_hwirq = guest_gsi; |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 5980 | irq_map->desc = desc; |
| 5981 | |
Suresh Warrier | e3c13e5 | 2016-08-19 15:35:51 +1000 | [diff] [blame] | 5982 | /* |
| 5983 | * Order the above two stores before the next to serialize with |
| 5984 | * the KVM real mode handler. |
| 5985 | */ |
| 5986 | smp_wmb(); |
Cédric Le Goater | 1753081 | 2021-07-01 15:27:48 +0200 | [diff] [blame] | 5987 | |
| 5988 | /* |
| 5989 | * The 'host_irq' number is mapped in the PCI-MSI domain but |
| 5990 | * the underlying calls, which will EOI the interrupt in real |
| 5991 | * mode, need an HW IRQ number mapped in the XICS IRQ domain. |
| 5992 | */ |
| 5993 | host_data = irq_domain_get_irq_data(irq_get_default_host(), host_irq); |
| 5994 | irq_map->r_hwirq = (unsigned int)irqd_to_hwirq(host_data); |
Suresh Warrier | e3c13e5 | 2016-08-19 15:35:51 +1000 | [diff] [blame] | 5995 | |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 5996 | if (i == pimap->n_mapped) |
| 5997 | pimap->n_mapped++; |
| 5998 | |
Paul Mackerras | 03f9533 | 2019-02-04 22:07:20 +1100 | [diff] [blame] | 5999 | if (xics_on_xive()) |
Cédric Le Goater | e5e78b1 | 2021-07-01 15:27:32 +0200 | [diff] [blame] | 6000 | rc = kvmppc_xive_set_mapped(kvm, guest_gsi, host_irq); |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 6001 | else |
Cédric Le Goater | 1753081 | 2021-07-01 15:27:48 +0200 | [diff] [blame] | 6002 | kvmppc_xics_set_mapped(kvm, guest_gsi, irq_map->r_hwirq); |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 6003 | if (rc) |
| 6004 | irq_map->r_hwirq = 0; |
Paul Mackerras | 5d37519 | 2016-08-19 15:35:56 +1000 | [diff] [blame] | 6005 | |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 6006 | mutex_unlock(&kvm->lock); |
| 6007 | |
| 6008 | return 0; |
| 6009 | } |
| 6010 | |
| 6011 | static int kvmppc_clr_passthru_irq(struct kvm *kvm, int host_irq, int guest_gsi) |
| 6012 | { |
| 6013 | struct irq_desc *desc; |
| 6014 | struct kvmppc_passthru_irqmap *pimap; |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 6015 | int i, rc = 0; |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 6016 | |
Suresh Warrier | 644abbb | 2016-08-19 15:35:54 +1000 | [diff] [blame] | 6017 | if (!kvm_irq_bypass) |
| 6018 | return 0; |
| 6019 | |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 6020 | desc = irq_to_desc(host_irq); |
| 6021 | if (!desc) |
| 6022 | return -EIO; |
| 6023 | |
| 6024 | mutex_lock(&kvm->lock); |
Markus Elfring | a1c52e1 | 2017-01-20 11:00:08 +0100 | [diff] [blame] | 6025 | if (!kvm->arch.pimap) |
| 6026 | goto unlock; |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 6027 | |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 6028 | pimap = kvm->arch.pimap; |
| 6029 | |
| 6030 | for (i = 0; i < pimap->n_mapped; i++) { |
| 6031 | if (guest_gsi == pimap->mapped[i].v_hwirq) |
| 6032 | break; |
| 6033 | } |
| 6034 | |
| 6035 | if (i == pimap->n_mapped) { |
| 6036 | mutex_unlock(&kvm->lock); |
| 6037 | return -ENODEV; |
| 6038 | } |
| 6039 | |
Paul Mackerras | 03f9533 | 2019-02-04 22:07:20 +1100 | [diff] [blame] | 6040 | if (xics_on_xive()) |
Cédric Le Goater | e5e78b1 | 2021-07-01 15:27:32 +0200 | [diff] [blame] | 6041 | rc = kvmppc_xive_clr_mapped(kvm, guest_gsi, host_irq); |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 6042 | else |
| 6043 | kvmppc_xics_clr_mapped(kvm, guest_gsi, pimap->mapped[i].r_hwirq); |
Paul Mackerras | 5d37519 | 2016-08-19 15:35:56 +1000 | [diff] [blame] | 6044 | |
Michael Ellerman | 2b46188 | 2022-07-18 19:51:58 +1000 | [diff] [blame] | 6045 | /* invalidate the entry (what to do on error from the above ?) */ |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 6046 | pimap->mapped[i].r_hwirq = 0; |
| 6047 | |
| 6048 | /* |
| 6049 | * We don't free this structure even when the count goes to |
| 6050 | * zero. The structure is freed when we destroy the VM. |
| 6051 | */ |
Markus Elfring | a1c52e1 | 2017-01-20 11:00:08 +0100 | [diff] [blame] | 6052 | unlock: |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 6053 | mutex_unlock(&kvm->lock); |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 6054 | return rc; |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 6055 | } |
| 6056 | |
| 6057 | static int kvmppc_irq_bypass_add_producer_hv(struct irq_bypass_consumer *cons, |
| 6058 | struct irq_bypass_producer *prod) |
| 6059 | { |
| 6060 | int ret = 0; |
| 6061 | struct kvm_kernel_irqfd *irqfd = |
| 6062 | container_of(cons, struct kvm_kernel_irqfd, consumer); |
| 6063 | |
| 6064 | irqfd->producer = prod; |
| 6065 | |
| 6066 | ret = kvmppc_set_passthru_irq(irqfd->kvm, prod->irq, irqfd->gsi); |
| 6067 | if (ret) |
| 6068 | pr_info("kvmppc_set_passthru_irq (irq %d, gsi %d) fails: %d\n", |
| 6069 | prod->irq, irqfd->gsi, ret); |
| 6070 | |
| 6071 | return ret; |
| 6072 | } |
| 6073 | |
| 6074 | static void kvmppc_irq_bypass_del_producer_hv(struct irq_bypass_consumer *cons, |
| 6075 | struct irq_bypass_producer *prod) |
| 6076 | { |
| 6077 | int ret; |
| 6078 | struct kvm_kernel_irqfd *irqfd = |
| 6079 | container_of(cons, struct kvm_kernel_irqfd, consumer); |
| 6080 | |
| 6081 | irqfd->producer = NULL; |
| 6082 | |
| 6083 | /* |
| 6084 | * When producer of consumer is unregistered, we change back to |
| 6085 | * default external interrupt handling mode - KVM real mode |
| 6086 | * will switch back to host. |
| 6087 | */ |
| 6088 | ret = kvmppc_clr_passthru_irq(irqfd->kvm, prod->irq, irqfd->gsi); |
| 6089 | if (ret) |
| 6090 | pr_warn("kvmppc_clr_passthru_irq (irq %d, gsi %d) fails: %d\n", |
| 6091 | prod->irq, irqfd->gsi, ret); |
| 6092 | } |
Suresh Warrier | 8daaafc | 2016-08-19 15:35:48 +1000 | [diff] [blame] | 6093 | #endif |
| 6094 | |
Thomas Huth | 67c48662e | 2023-02-08 15:01:00 +0100 | [diff] [blame] | 6095 | static int kvm_arch_vm_ioctl_hv(struct file *filp, |
| 6096 | unsigned int ioctl, unsigned long arg) |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 6097 | { |
| 6098 | struct kvm *kvm __maybe_unused = filp->private_data; |
| 6099 | void __user *argp = (void __user *)arg; |
Thomas Huth | 67c48662e | 2023-02-08 15:01:00 +0100 | [diff] [blame] | 6100 | int r; |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 6101 | |
| 6102 | switch (ioctl) { |
| 6103 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 6104 | case KVM_PPC_ALLOCATE_HTAB: { |
| 6105 | u32 htab_order; |
| 6106 | |
Fabiano Rosas | 05e6295d | 2020-09-11 01:16:07 -0300 | [diff] [blame] | 6107 | /* If we're a nested hypervisor, we currently only support radix */ |
| 6108 | if (kvmhv_on_pseries()) { |
| 6109 | r = -EOPNOTSUPP; |
| 6110 | break; |
| 6111 | } |
| 6112 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 6113 | r = -EFAULT; |
| 6114 | if (get_user(htab_order, (u32 __user *)argp)) |
| 6115 | break; |
David Gibson | f98a8bf | 2016-12-20 16:49:03 +1100 | [diff] [blame] | 6116 | r = kvmppc_alloc_reset_hpt(kvm, htab_order); |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 6117 | if (r) |
| 6118 | break; |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 6119 | r = 0; |
| 6120 | break; |
| 6121 | } |
| 6122 | |
| 6123 | case KVM_PPC_GET_HTAB_FD: { |
| 6124 | struct kvm_get_htab_fd ghf; |
| 6125 | |
| 6126 | r = -EFAULT; |
| 6127 | if (copy_from_user(&ghf, argp, sizeof(ghf))) |
| 6128 | break; |
| 6129 | r = kvm_vm_ioctl_get_htab_fd(kvm, &ghf); |
| 6130 | break; |
| 6131 | } |
| 6132 | |
David Gibson | 5e98596 | 2016-12-20 16:49:05 +1100 | [diff] [blame] | 6133 | case KVM_PPC_RESIZE_HPT_PREPARE: { |
| 6134 | struct kvm_ppc_resize_hpt rhpt; |
| 6135 | |
| 6136 | r = -EFAULT; |
| 6137 | if (copy_from_user(&rhpt, argp, sizeof(rhpt))) |
| 6138 | break; |
| 6139 | |
| 6140 | r = kvm_vm_ioctl_resize_hpt_prepare(kvm, &rhpt); |
| 6141 | break; |
| 6142 | } |
| 6143 | |
| 6144 | case KVM_PPC_RESIZE_HPT_COMMIT: { |
| 6145 | struct kvm_ppc_resize_hpt rhpt; |
| 6146 | |
| 6147 | r = -EFAULT; |
| 6148 | if (copy_from_user(&rhpt, argp, sizeof(rhpt))) |
| 6149 | break; |
| 6150 | |
| 6151 | r = kvm_vm_ioctl_resize_hpt_commit(kvm, &rhpt); |
| 6152 | break; |
| 6153 | } |
| 6154 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 6155 | default: |
| 6156 | r = -ENOTTY; |
| 6157 | } |
| 6158 | |
| 6159 | return r; |
| 6160 | } |
| 6161 | |
Paul Mackerras | 699a0ea | 2014-06-02 11:02:59 +1000 | [diff] [blame] | 6162 | /* |
| 6163 | * List of hcall numbers to enable by default. |
| 6164 | * For compatibility with old userspace, we enable by default |
| 6165 | * all hcalls that were implemented before the hcall-enabling |
| 6166 | * facility was added. Note this list should not include H_RTAS. |
| 6167 | */ |
| 6168 | static unsigned int default_hcall_list[] = { |
| 6169 | H_REMOVE, |
| 6170 | H_ENTER, |
| 6171 | H_READ, |
| 6172 | H_PROTECT, |
| 6173 | H_BULK_REMOVE, |
Nicholas Piggin | 0fd85cb8 | 2021-04-12 11:48:41 +1000 | [diff] [blame] | 6174 | #ifdef CONFIG_SPAPR_TCE_IOMMU |
Paul Mackerras | 699a0ea | 2014-06-02 11:02:59 +1000 | [diff] [blame] | 6175 | H_GET_TCE, |
| 6176 | H_PUT_TCE, |
Nicholas Piggin | 0fd85cb8 | 2021-04-12 11:48:41 +1000 | [diff] [blame] | 6177 | #endif |
Paul Mackerras | 699a0ea | 2014-06-02 11:02:59 +1000 | [diff] [blame] | 6178 | H_SET_DABR, |
| 6179 | H_SET_XDABR, |
| 6180 | H_CEDE, |
| 6181 | H_PROD, |
| 6182 | H_CONFER, |
| 6183 | H_REGISTER_VPA, |
| 6184 | #ifdef CONFIG_KVM_XICS |
| 6185 | H_EOI, |
| 6186 | H_CPPR, |
| 6187 | H_IPI, |
| 6188 | H_IPOLL, |
| 6189 | H_XIRR, |
| 6190 | H_XIRR_X, |
| 6191 | #endif |
| 6192 | 0 |
| 6193 | }; |
| 6194 | |
| 6195 | static void init_default_hcalls(void) |
| 6196 | { |
| 6197 | int i; |
Paul Mackerras | ae2113a | 2014-06-02 11:03:00 +1000 | [diff] [blame] | 6198 | unsigned int hcall; |
Paul Mackerras | 699a0ea | 2014-06-02 11:02:59 +1000 | [diff] [blame] | 6199 | |
Paul Mackerras | ae2113a | 2014-06-02 11:03:00 +1000 | [diff] [blame] | 6200 | for (i = 0; default_hcall_list[i]; ++i) { |
| 6201 | hcall = default_hcall_list[i]; |
| 6202 | WARN_ON(!kvmppc_hcall_impl_hv(hcall)); |
| 6203 | __set_bit(hcall / 4, default_enabled_hcalls); |
| 6204 | } |
Paul Mackerras | 699a0ea | 2014-06-02 11:02:59 +1000 | [diff] [blame] | 6205 | } |
| 6206 | |
Paul Mackerras | c927013 | 2017-01-30 21:21:41 +1100 | [diff] [blame] | 6207 | static int kvmhv_configure_mmu(struct kvm *kvm, struct kvm_ppc_mmuv3_cfg *cfg) |
| 6208 | { |
Paul Mackerras | 468808b | 2017-01-30 21:21:42 +1100 | [diff] [blame] | 6209 | unsigned long lpcr; |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 6210 | int radix; |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 6211 | int err; |
Paul Mackerras | 468808b | 2017-01-30 21:21:42 +1100 | [diff] [blame] | 6212 | |
| 6213 | /* If not on a POWER9, reject it */ |
| 6214 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
| 6215 | return -ENODEV; |
| 6216 | |
| 6217 | /* If any unknown flags set, reject it */ |
| 6218 | if (cfg->flags & ~(KVM_PPC_MMUV3_RADIX | KVM_PPC_MMUV3_GTSE)) |
| 6219 | return -EINVAL; |
| 6220 | |
Paul Mackerras | 468808b | 2017-01-30 21:21:42 +1100 | [diff] [blame] | 6221 | /* GR (guest radix) bit in process_table field must match */ |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 6222 | radix = !!(cfg->flags & KVM_PPC_MMUV3_RADIX); |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 6223 | if (!!(cfg->process_table & PATB_GR) != radix) |
Paul Mackerras | 468808b | 2017-01-30 21:21:42 +1100 | [diff] [blame] | 6224 | return -EINVAL; |
| 6225 | |
| 6226 | /* Process table size field must be reasonable, i.e. <= 24 */ |
| 6227 | if ((cfg->process_table & PRTS_MASK) > 24) |
| 6228 | return -EINVAL; |
| 6229 | |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 6230 | /* We can change a guest to/from radix now, if the host is radix */ |
| 6231 | if (radix && !radix_enabled()) |
| 6232 | return -EINVAL; |
| 6233 | |
Paul Mackerras | de760db | 2018-10-08 16:31:16 +1100 | [diff] [blame] | 6234 | /* If we're a nested hypervisor, we currently only support radix */ |
| 6235 | if (kvmhv_on_pseries() && !radix) |
| 6236 | return -EINVAL; |
| 6237 | |
Paul Mackerras | 0d4ee88 | 2019-05-23 16:35:34 +1000 | [diff] [blame] | 6238 | mutex_lock(&kvm->arch.mmu_setup_lock); |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 6239 | if (radix != kvm_is_radix(kvm)) { |
| 6240 | if (kvm->arch.mmu_ready) { |
| 6241 | kvm->arch.mmu_ready = 0; |
| 6242 | /* order mmu_ready vs. vcpus_running */ |
| 6243 | smp_mb(); |
| 6244 | if (atomic_read(&kvm->arch.vcpus_running)) { |
| 6245 | kvm->arch.mmu_ready = 1; |
| 6246 | err = -EBUSY; |
| 6247 | goto out_unlock; |
| 6248 | } |
| 6249 | } |
| 6250 | if (radix) |
| 6251 | err = kvmppc_switch_mmu_to_radix(kvm); |
| 6252 | else |
| 6253 | err = kvmppc_switch_mmu_to_hpt(kvm); |
| 6254 | if (err) |
| 6255 | goto out_unlock; |
| 6256 | } |
| 6257 | |
Paul Mackerras | 468808b | 2017-01-30 21:21:42 +1100 | [diff] [blame] | 6258 | kvm->arch.process_table = cfg->process_table; |
| 6259 | kvmppc_setup_partition_table(kvm); |
| 6260 | |
| 6261 | lpcr = (cfg->flags & KVM_PPC_MMUV3_GTSE) ? LPCR_GTSE : 0; |
| 6262 | kvmppc_update_lpcr(kvm, lpcr, LPCR_GTSE); |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 6263 | err = 0; |
Paul Mackerras | 468808b | 2017-01-30 21:21:42 +1100 | [diff] [blame] | 6264 | |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 6265 | out_unlock: |
Paul Mackerras | 0d4ee88 | 2019-05-23 16:35:34 +1000 | [diff] [blame] | 6266 | mutex_unlock(&kvm->arch.mmu_setup_lock); |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 6267 | return err; |
Paul Mackerras | c927013 | 2017-01-30 21:21:41 +1100 | [diff] [blame] | 6268 | } |
| 6269 | |
Paul Mackerras | aa069a9 | 2018-09-21 20:02:01 +1000 | [diff] [blame] | 6270 | static int kvmhv_enable_nested(struct kvm *kvm) |
| 6271 | { |
| 6272 | if (!nested) |
| 6273 | return -EPERM; |
Nicholas Piggin | cbcff8b | 2021-05-28 19:07:46 +1000 | [diff] [blame] | 6274 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
Paul Mackerras | aa069a9 | 2018-09-21 20:02:01 +1000 | [diff] [blame] | 6275 | return -ENODEV; |
Nicholas Piggin | 0bf7e1b | 2021-05-28 19:07:51 +1000 | [diff] [blame] | 6276 | if (!radix_enabled()) |
Paul Mackerras | aa069a9 | 2018-09-21 20:02:01 +1000 | [diff] [blame] | 6277 | return -ENODEV; |
Jordan Niethe | 19d31c5 | 2023-09-14 13:05:59 +1000 | [diff] [blame] | 6278 | if (kvmhv_is_nestedv2()) |
| 6279 | return -ENODEV; |
Paul Mackerras | aa069a9 | 2018-09-21 20:02:01 +1000 | [diff] [blame] | 6280 | |
| 6281 | /* kvm == NULL means the caller is testing if the capability exists */ |
| 6282 | if (kvm) |
| 6283 | kvm->arch.nested_enable = true; |
| 6284 | return 0; |
| 6285 | } |
| 6286 | |
Suraj Jitindar Singh | dceadcf9 | 2018-12-14 16:29:06 +1100 | [diff] [blame] | 6287 | static int kvmhv_load_from_eaddr(struct kvm_vcpu *vcpu, ulong *eaddr, void *ptr, |
| 6288 | int size) |
| 6289 | { |
| 6290 | int rc = -EINVAL; |
| 6291 | |
| 6292 | if (kvmhv_vcpu_is_radix(vcpu)) { |
| 6293 | rc = kvmhv_copy_from_guest_radix(vcpu, *eaddr, ptr, size); |
| 6294 | |
| 6295 | if (rc > 0) |
| 6296 | rc = -EINVAL; |
| 6297 | } |
| 6298 | |
| 6299 | /* For now quadrants are the only way to access nested guest memory */ |
| 6300 | if (rc && vcpu->arch.nested) |
| 6301 | rc = -EAGAIN; |
| 6302 | |
| 6303 | return rc; |
| 6304 | } |
| 6305 | |
| 6306 | static int kvmhv_store_to_eaddr(struct kvm_vcpu *vcpu, ulong *eaddr, void *ptr, |
| 6307 | int size) |
| 6308 | { |
| 6309 | int rc = -EINVAL; |
| 6310 | |
| 6311 | if (kvmhv_vcpu_is_radix(vcpu)) { |
| 6312 | rc = kvmhv_copy_to_guest_radix(vcpu, *eaddr, ptr, size); |
| 6313 | |
| 6314 | if (rc > 0) |
| 6315 | rc = -EINVAL; |
| 6316 | } |
| 6317 | |
| 6318 | /* For now quadrants are the only way to access nested guest memory */ |
| 6319 | if (rc && vcpu->arch.nested) |
| 6320 | rc = -EAGAIN; |
| 6321 | |
| 6322 | return rc; |
| 6323 | } |
| 6324 | |
Bharata B Rao | 2294568 | 2019-11-25 08:36:30 +0530 | [diff] [blame] | 6325 | static void unpin_vpa_reset(struct kvm *kvm, struct kvmppc_vpa *vpa) |
| 6326 | { |
| 6327 | unpin_vpa(kvm, vpa); |
| 6328 | vpa->gpa = 0; |
| 6329 | vpa->pinned_addr = NULL; |
| 6330 | vpa->dirty = false; |
| 6331 | vpa->update_pending = 0; |
| 6332 | } |
| 6333 | |
| 6334 | /* |
Paul Mackerras | 9a5788c | 2020-03-19 15:29:55 +1100 | [diff] [blame] | 6335 | * Enable a guest to become a secure VM, or test whether |
| 6336 | * that could be enabled. |
| 6337 | * Called when the KVM_CAP_PPC_SECURE_GUEST capability is |
| 6338 | * tested (kvm == NULL) or enabled (kvm != NULL). |
| 6339 | */ |
| 6340 | static int kvmhv_enable_svm(struct kvm *kvm) |
| 6341 | { |
| 6342 | if (!kvmppc_uvmem_available()) |
| 6343 | return -EINVAL; |
| 6344 | if (kvm) |
| 6345 | kvm->arch.svm_enabled = 1; |
| 6346 | return 0; |
| 6347 | } |
| 6348 | |
| 6349 | /* |
Bharata B Rao | 2294568 | 2019-11-25 08:36:30 +0530 | [diff] [blame] | 6350 | * IOCTL handler to turn off secure mode of guest |
| 6351 | * |
| 6352 | * - Release all device pages |
| 6353 | * - Issue ucall to terminate the guest on the UV side |
| 6354 | * - Unpin the VPA pages. |
| 6355 | * - Reinit the partition scoped page tables |
| 6356 | */ |
| 6357 | static int kvmhv_svm_off(struct kvm *kvm) |
| 6358 | { |
| 6359 | struct kvm_vcpu *vcpu; |
| 6360 | int mmu_was_ready; |
| 6361 | int srcu_idx; |
| 6362 | int ret = 0; |
Marc Zyngier | 46808a4 | 2021-11-16 16:04:02 +0000 | [diff] [blame] | 6363 | unsigned long i; |
Bharata B Rao | 2294568 | 2019-11-25 08:36:30 +0530 | [diff] [blame] | 6364 | |
| 6365 | if (!(kvm->arch.secure_guest & KVMPPC_SECURE_INIT_START)) |
| 6366 | return ret; |
| 6367 | |
| 6368 | mutex_lock(&kvm->arch.mmu_setup_lock); |
| 6369 | mmu_was_ready = kvm->arch.mmu_ready; |
| 6370 | if (kvm->arch.mmu_ready) { |
| 6371 | kvm->arch.mmu_ready = 0; |
| 6372 | /* order mmu_ready vs. vcpus_running */ |
| 6373 | smp_mb(); |
| 6374 | if (atomic_read(&kvm->arch.vcpus_running)) { |
| 6375 | kvm->arch.mmu_ready = 1; |
| 6376 | ret = -EBUSY; |
| 6377 | goto out; |
| 6378 | } |
| 6379 | } |
| 6380 | |
| 6381 | srcu_idx = srcu_read_lock(&kvm->srcu); |
Sean Christopherson | eed52e4 | 2023-10-27 11:22:04 -0700 | [diff] [blame] | 6382 | for (i = 0; i < kvm_arch_nr_memslot_as_ids(kvm); i++) { |
Bharata B Rao | 2294568 | 2019-11-25 08:36:30 +0530 | [diff] [blame] | 6383 | struct kvm_memory_slot *memslot; |
| 6384 | struct kvm_memslots *slots = __kvm_memslots(kvm, i); |
Maciej S. Szmigiero | a54d806 | 2021-12-06 20:54:30 +0100 | [diff] [blame] | 6385 | int bkt; |
Bharata B Rao | 2294568 | 2019-11-25 08:36:30 +0530 | [diff] [blame] | 6386 | |
| 6387 | if (!slots) |
| 6388 | continue; |
| 6389 | |
Maciej S. Szmigiero | a54d806 | 2021-12-06 20:54:30 +0100 | [diff] [blame] | 6390 | kvm_for_each_memslot(memslot, bkt, slots) { |
Sukadev Bhattiprolu | ce477a7 | 2019-12-19 13:51:45 -0800 | [diff] [blame] | 6391 | kvmppc_uvmem_drop_pages(memslot, kvm, true); |
Bharata B Rao | 2294568 | 2019-11-25 08:36:30 +0530 | [diff] [blame] | 6392 | uv_unregister_mem_slot(kvm->arch.lpid, memslot->id); |
| 6393 | } |
| 6394 | } |
| 6395 | srcu_read_unlock(&kvm->srcu, srcu_idx); |
| 6396 | |
| 6397 | ret = uv_svm_terminate(kvm->arch.lpid); |
| 6398 | if (ret != U_SUCCESS) { |
| 6399 | ret = -EINVAL; |
| 6400 | goto out; |
| 6401 | } |
| 6402 | |
| 6403 | /* |
| 6404 | * When secure guest is reset, all the guest pages are sent |
| 6405 | * to UV via UV_PAGE_IN before the non-boot vcpus get a |
| 6406 | * chance to run and unpin their VPA pages. Unpinning of all |
| 6407 | * VPA pages is done here explicitly so that VPA pages |
| 6408 | * can be migrated to the secure side. |
| 6409 | * |
| 6410 | * This is required to for the secure SMP guest to reboot |
| 6411 | * correctly. |
| 6412 | */ |
| 6413 | kvm_for_each_vcpu(i, vcpu, kvm) { |
| 6414 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 6415 | unpin_vpa_reset(kvm, &vcpu->arch.dtl); |
| 6416 | unpin_vpa_reset(kvm, &vcpu->arch.slb_shadow); |
| 6417 | unpin_vpa_reset(kvm, &vcpu->arch.vpa); |
| 6418 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 6419 | } |
| 6420 | |
| 6421 | kvmppc_setup_partition_table(kvm); |
| 6422 | kvm->arch.secure_guest = 0; |
| 6423 | kvm->arch.mmu_ready = mmu_was_ready; |
| 6424 | out: |
| 6425 | mutex_unlock(&kvm->arch.mmu_setup_lock); |
| 6426 | return ret; |
| 6427 | } |
| 6428 | |
Ravi Bangoria | d9a47ed | 2020-12-16 16:12:19 +0530 | [diff] [blame] | 6429 | static int kvmhv_enable_dawr1(struct kvm *kvm) |
| 6430 | { |
| 6431 | if (!cpu_has_feature(CPU_FTR_DAWR1)) |
| 6432 | return -ENODEV; |
| 6433 | |
| 6434 | /* kvm == NULL means the caller is testing if the capability exists */ |
| 6435 | if (kvm) |
| 6436 | kvm->arch.dawr1_enabled = true; |
| 6437 | return 0; |
| 6438 | } |
| 6439 | |
Fabiano Rosas | a722076 | 2021-02-05 13:41:54 -0300 | [diff] [blame] | 6440 | static bool kvmppc_hash_v3_possible(void) |
| 6441 | { |
Nicholas Piggin | fae5c9f | 2021-05-28 19:07:52 +1000 | [diff] [blame] | 6442 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
Fabiano Rosas | a722076 | 2021-02-05 13:41:54 -0300 | [diff] [blame] | 6443 | return false; |
| 6444 | |
Nicholas Piggin | fae5c9f | 2021-05-28 19:07:52 +1000 | [diff] [blame] | 6445 | if (!cpu_has_feature(CPU_FTR_HVMODE)) |
| 6446 | return false; |
| 6447 | |
| 6448 | /* |
| 6449 | * POWER9 chips before version 2.02 can't have some threads in |
| 6450 | * HPT mode and some in radix mode on the same core. |
| 6451 | */ |
| 6452 | if (radix_enabled()) { |
| 6453 | unsigned int pvr = mfspr(SPRN_PVR); |
| 6454 | if ((pvr >> 16) == PVR_POWER9 && |
| 6455 | (((pvr & 0xe000) == 0 && (pvr & 0xfff) < 0x202) || |
| 6456 | ((pvr & 0xe000) == 0x2000 && (pvr & 0xfff) < 0x101))) |
| 6457 | return false; |
| 6458 | } |
| 6459 | |
| 6460 | return true; |
Fabiano Rosas | a722076 | 2021-02-05 13:41:54 -0300 | [diff] [blame] | 6461 | } |
| 6462 | |
Aneesh Kumar K.V | cbbc58d | 2013-10-07 22:18:01 +0530 | [diff] [blame] | 6463 | static struct kvmppc_ops kvm_ops_hv = { |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 6464 | .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_hv, |
| 6465 | .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_hv, |
| 6466 | .get_one_reg = kvmppc_get_one_reg_hv, |
| 6467 | .set_one_reg = kvmppc_set_one_reg_hv, |
| 6468 | .vcpu_load = kvmppc_core_vcpu_load_hv, |
| 6469 | .vcpu_put = kvmppc_core_vcpu_put_hv, |
Nicholas Piggin | 87a45e0 | 2019-10-02 16:00:22 +1000 | [diff] [blame] | 6470 | .inject_interrupt = kvmppc_inject_interrupt_hv, |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 6471 | .set_msr = kvmppc_set_msr_hv, |
| 6472 | .vcpu_run = kvmppc_vcpu_run_hv, |
| 6473 | .vcpu_create = kvmppc_core_vcpu_create_hv, |
| 6474 | .vcpu_free = kvmppc_core_vcpu_free_hv, |
| 6475 | .check_requests = kvmppc_core_check_requests_hv, |
| 6476 | .get_dirty_log = kvm_vm_ioctl_get_dirty_log_hv, |
| 6477 | .flush_memslot = kvmppc_core_flush_memslot_hv, |
| 6478 | .prepare_memory_region = kvmppc_core_prepare_memory_region_hv, |
| 6479 | .commit_memory_region = kvmppc_core_commit_memory_region_hv, |
Sean Christopherson | b1c5356 | 2021-04-01 17:56:53 -0700 | [diff] [blame] | 6480 | .unmap_gfn_range = kvm_unmap_gfn_range_hv, |
| 6481 | .age_gfn = kvm_age_gfn_hv, |
| 6482 | .test_age_gfn = kvm_test_age_gfn_hv, |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 6483 | .free_memslot = kvmppc_core_free_memslot_hv, |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 6484 | .init_vm = kvmppc_core_init_vm_hv, |
| 6485 | .destroy_vm = kvmppc_core_destroy_vm_hv, |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 6486 | .get_smmu_info = kvm_vm_ioctl_get_smmu_info_hv, |
| 6487 | .emulate_op = kvmppc_core_emulate_op_hv, |
| 6488 | .emulate_mtspr = kvmppc_core_emulate_mtspr_hv, |
| 6489 | .emulate_mfspr = kvmppc_core_emulate_mfspr_hv, |
| 6490 | .fast_vcpu_kick = kvmppc_fast_vcpu_kick_hv, |
| 6491 | .arch_vm_ioctl = kvm_arch_vm_ioctl_hv, |
Paul Mackerras | ae2113a | 2014-06-02 11:03:00 +1000 | [diff] [blame] | 6492 | .hcall_implemented = kvmppc_hcall_impl_hv, |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 6493 | #ifdef CONFIG_KVM_XICS |
| 6494 | .irq_bypass_add_producer = kvmppc_irq_bypass_add_producer_hv, |
| 6495 | .irq_bypass_del_producer = kvmppc_irq_bypass_del_producer_hv, |
| 6496 | #endif |
Paul Mackerras | c927013 | 2017-01-30 21:21:41 +1100 | [diff] [blame] | 6497 | .configure_mmu = kvmhv_configure_mmu, |
| 6498 | .get_rmmu_info = kvmhv_get_rmmu_info, |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 6499 | .set_smt_mode = kvmhv_set_smt_mode, |
Paul Mackerras | aa069a9 | 2018-09-21 20:02:01 +1000 | [diff] [blame] | 6500 | .enable_nested = kvmhv_enable_nested, |
Suraj Jitindar Singh | dceadcf9 | 2018-12-14 16:29:06 +1100 | [diff] [blame] | 6501 | .load_from_eaddr = kvmhv_load_from_eaddr, |
| 6502 | .store_to_eaddr = kvmhv_store_to_eaddr, |
Paul Mackerras | 9a5788c | 2020-03-19 15:29:55 +1100 | [diff] [blame] | 6503 | .enable_svm = kvmhv_enable_svm, |
Bharata B Rao | 2294568 | 2019-11-25 08:36:30 +0530 | [diff] [blame] | 6504 | .svm_off = kvmhv_svm_off, |
Ravi Bangoria | d9a47ed | 2020-12-16 16:12:19 +0530 | [diff] [blame] | 6505 | .enable_dawr1 = kvmhv_enable_dawr1, |
Fabiano Rosas | a722076 | 2021-02-05 13:41:54 -0300 | [diff] [blame] | 6506 | .hash_v3_possible = kvmppc_hash_v3_possible, |
Alexey Kardashevskiy | faf01ae | 2022-01-11 11:54:04 +1100 | [diff] [blame] | 6507 | .create_vcpu_debugfs = kvmppc_arch_create_vcpu_debugfs_hv, |
| 6508 | .create_vm_debugfs = kvmppc_arch_create_vm_debugfs_hv, |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 6509 | }; |
| 6510 | |
Mahesh Salgaonkar | fd7bacb | 2016-05-15 09:44:26 +0530 | [diff] [blame] | 6511 | static int kvm_init_subcore_bitmap(void) |
| 6512 | { |
| 6513 | int i, j; |
| 6514 | int nr_cores = cpu_nr_cores(); |
| 6515 | struct sibling_subcore_state *sibling_subcore_state; |
| 6516 | |
| 6517 | for (i = 0; i < nr_cores; i++) { |
| 6518 | int first_cpu = i * threads_per_core; |
| 6519 | int node = cpu_to_node(first_cpu); |
| 6520 | |
| 6521 | /* Ignore if it is already allocated. */ |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 6522 | if (paca_ptrs[first_cpu]->sibling_subcore_state) |
Mahesh Salgaonkar | fd7bacb | 2016-05-15 09:44:26 +0530 | [diff] [blame] | 6523 | continue; |
| 6524 | |
| 6525 | sibling_subcore_state = |
wangbo | 08434ab | 2019-01-07 20:15:52 +0800 | [diff] [blame] | 6526 | kzalloc_node(sizeof(struct sibling_subcore_state), |
Mahesh Salgaonkar | fd7bacb | 2016-05-15 09:44:26 +0530 | [diff] [blame] | 6527 | GFP_KERNEL, node); |
| 6528 | if (!sibling_subcore_state) |
| 6529 | return -ENOMEM; |
| 6530 | |
Mahesh Salgaonkar | fd7bacb | 2016-05-15 09:44:26 +0530 | [diff] [blame] | 6531 | |
| 6532 | for (j = 0; j < threads_per_core; j++) { |
| 6533 | int cpu = first_cpu + j; |
| 6534 | |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 6535 | paca_ptrs[cpu]->sibling_subcore_state = |
| 6536 | sibling_subcore_state; |
Mahesh Salgaonkar | fd7bacb | 2016-05-15 09:44:26 +0530 | [diff] [blame] | 6537 | } |
| 6538 | } |
| 6539 | return 0; |
| 6540 | } |
| 6541 | |
Paul Mackerras | 5a31935 | 2017-01-30 21:21:46 +1100 | [diff] [blame] | 6542 | static int kvmppc_radix_possible(void) |
| 6543 | { |
| 6544 | return cpu_has_feature(CPU_FTR_ARCH_300) && radix_enabled(); |
| 6545 | } |
| 6546 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 6547 | static int kvmppc_book3s_init_hv(void) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 6548 | { |
| 6549 | int r; |
Nicholas Piggin | 2275d7b | 2019-09-03 01:29:31 +1000 | [diff] [blame] | 6550 | |
| 6551 | if (!tlbie_capable) { |
| 6552 | pr_err("KVM-HV: Host does not support TLBIE\n"); |
| 6553 | return -ENODEV; |
| 6554 | } |
| 6555 | |
Aneesh Kumar K.V | cbbc58d | 2013-10-07 22:18:01 +0530 | [diff] [blame] | 6556 | /* |
| 6557 | * FIXME!! Do we need to check on all cpus ? |
| 6558 | */ |
| 6559 | r = kvmppc_core_check_processor_compat_hv(); |
| 6560 | if (r < 0) |
Paul Mackerras | 739e242 | 2014-03-25 10:47:05 +1100 | [diff] [blame] | 6561 | return -ENODEV; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 6562 | |
Paul Mackerras | 8e3f5fc | 2018-10-08 16:31:03 +1100 | [diff] [blame] | 6563 | r = kvmhv_nested_init(); |
| 6564 | if (r) |
| 6565 | return r; |
| 6566 | |
Nicholas Piggin | 9c5a432 | 2021-11-23 19:52:31 +1000 | [diff] [blame] | 6567 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) { |
| 6568 | r = kvm_init_subcore_bitmap(); |
| 6569 | if (r) |
Fabiano Rosas | 175be7e | 2022-01-25 12:57:34 -0300 | [diff] [blame] | 6570 | goto err; |
Nicholas Piggin | 9c5a432 | 2021-11-23 19:52:31 +1000 | [diff] [blame] | 6571 | } |
Mahesh Salgaonkar | fd7bacb | 2016-05-15 09:44:26 +0530 | [diff] [blame] | 6572 | |
Paul Mackerras | f725758 | 2016-11-18 09:02:08 +1100 | [diff] [blame] | 6573 | /* |
| 6574 | * We need a way of accessing the XICS interrupt controller, |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 6575 | * either directly, via paca_ptrs[cpu]->kvm_hstate.xics_phys, or |
Paul Mackerras | f725758 | 2016-11-18 09:02:08 +1100 | [diff] [blame] | 6576 | * indirectly, via OPAL. |
| 6577 | */ |
| 6578 | #ifdef CONFIG_SMP |
Paul Mackerras | 03f9533 | 2019-02-04 22:07:20 +1100 | [diff] [blame] | 6579 | if (!xics_on_xive() && !kvmhv_on_pseries() && |
Paul Mackerras | f3c18e9 | 2018-10-08 16:31:05 +1100 | [diff] [blame] | 6580 | !local_paca->kvm_hstate.xics_phys) { |
Paul Mackerras | f725758 | 2016-11-18 09:02:08 +1100 | [diff] [blame] | 6581 | struct device_node *np; |
| 6582 | |
| 6583 | np = of_find_compatible_node(NULL, NULL, "ibm,opal-intc"); |
| 6584 | if (!np) { |
| 6585 | pr_err("KVM-HV: Cannot determine method for accessing XICS\n"); |
Fabiano Rosas | 175be7e | 2022-01-25 12:57:34 -0300 | [diff] [blame] | 6586 | r = -ENODEV; |
| 6587 | goto err; |
Paul Mackerras | f725758 | 2016-11-18 09:02:08 +1100 | [diff] [blame] | 6588 | } |
Nicholas Mc Guire | 51eaa08 | 2018-07-07 08:53:07 +0200 | [diff] [blame] | 6589 | /* presence of intc confirmed - node can be dropped again */ |
| 6590 | of_node_put(np); |
Paul Mackerras | f725758 | 2016-11-18 09:02:08 +1100 | [diff] [blame] | 6591 | } |
| 6592 | #endif |
| 6593 | |
Paul Mackerras | 699a0ea | 2014-06-02 11:02:59 +1000 | [diff] [blame] | 6594 | init_default_hcalls(); |
| 6595 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 6596 | init_vcore_lists(); |
| 6597 | |
Aneesh Kumar K.V | cbbc58d | 2013-10-07 22:18:01 +0530 | [diff] [blame] | 6598 | r = kvmppc_mmu_hv_init(); |
Paul Mackerras | 5a31935 | 2017-01-30 21:21:46 +1100 | [diff] [blame] | 6599 | if (r) |
Fabiano Rosas | 175be7e | 2022-01-25 12:57:34 -0300 | [diff] [blame] | 6600 | goto err; |
Paul Mackerras | 5a31935 | 2017-01-30 21:21:46 +1100 | [diff] [blame] | 6601 | |
Fabiano Rosas | 69ab6ac | 2022-01-25 12:57:32 -0300 | [diff] [blame] | 6602 | if (kvmppc_radix_possible()) { |
Paul Mackerras | 5a31935 | 2017-01-30 21:21:46 +1100 | [diff] [blame] | 6603 | r = kvmppc_radix_init(); |
Fabiano Rosas | 69ab6ac | 2022-01-25 12:57:32 -0300 | [diff] [blame] | 6604 | if (r) |
Fabiano Rosas | 175be7e | 2022-01-25 12:57:34 -0300 | [diff] [blame] | 6605 | goto err; |
Fabiano Rosas | 69ab6ac | 2022-01-25 12:57:32 -0300 | [diff] [blame] | 6606 | } |
Paul Mackerras | 00608e1 | 2018-01-11 16:54:26 +1100 | [diff] [blame] | 6607 | |
Bharata B Rao | ca9f494 | 2019-11-25 08:36:26 +0530 | [diff] [blame] | 6608 | r = kvmppc_uvmem_init(); |
Fabiano Rosas | c5d0d77 | 2022-01-25 12:57:33 -0300 | [diff] [blame] | 6609 | if (r < 0) { |
Bharata B Rao | ca9f494 | 2019-11-25 08:36:26 +0530 | [diff] [blame] | 6610 | pr_err("KVM-HV: kvmppc_uvmem_init failed %d\n", r); |
Fabiano Rosas | c5d0d77 | 2022-01-25 12:57:33 -0300 | [diff] [blame] | 6611 | return r; |
| 6612 | } |
Bharata B Rao | ca9f494 | 2019-11-25 08:36:26 +0530 | [diff] [blame] | 6613 | |
Fabiano Rosas | c5d0d77 | 2022-01-25 12:57:33 -0300 | [diff] [blame] | 6614 | kvm_ops_hv.owner = THIS_MODULE; |
| 6615 | kvmppc_hv_ops = &kvm_ops_hv; |
| 6616 | |
| 6617 | return 0; |
Fabiano Rosas | 175be7e | 2022-01-25 12:57:34 -0300 | [diff] [blame] | 6618 | |
| 6619 | err: |
| 6620 | kvmhv_nested_exit(); |
| 6621 | kvmppc_radix_exit(); |
| 6622 | |
| 6623 | return r; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 6624 | } |
| 6625 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 6626 | static void kvmppc_book3s_exit_hv(void) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 6627 | { |
Bharata B Rao | ca9f494 | 2019-11-25 08:36:26 +0530 | [diff] [blame] | 6628 | kvmppc_uvmem_free(); |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 6629 | kvmppc_free_host_rm_ops(); |
Paul Mackerras | 5a31935 | 2017-01-30 21:21:46 +1100 | [diff] [blame] | 6630 | if (kvmppc_radix_possible()) |
| 6631 | kvmppc_radix_exit(); |
Aneesh Kumar K.V | cbbc58d | 2013-10-07 22:18:01 +0530 | [diff] [blame] | 6632 | kvmppc_hv_ops = NULL; |
Paul Mackerras | 8e3f5fc | 2018-10-08 16:31:03 +1100 | [diff] [blame] | 6633 | kvmhv_nested_exit(); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 6634 | } |
| 6635 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 6636 | module_init(kvmppc_book3s_init_hv); |
| 6637 | module_exit(kvmppc_book3s_exit_hv); |
Jeff Johnson | ca8dad0 | 2024-06-15 08:18:59 -0700 | [diff] [blame] | 6638 | MODULE_DESCRIPTION("KVM on Book3S (POWER8 and later) in hypervisor mode"); |
Aneesh Kumar K.V | 2ba9f0d | 2013-10-07 22:17:59 +0530 | [diff] [blame] | 6639 | MODULE_LICENSE("GPL"); |
Alexander Graf | 398a76c | 2013-12-09 13:53:42 +0100 | [diff] [blame] | 6640 | MODULE_ALIAS_MISCDEV(KVM_MINOR); |
| 6641 | MODULE_ALIAS("devname:kvm"); |