blob: e8a35ee00735e5dac09a989016e0cf966f4eaad0 [file] [log] [blame]
Avi Kivity6aa8b732006-12-10 02:21:36 -08001/*
2 * Kernel-based Virtual Machine driver for Linux
3 *
4 * This module enables machines with Intel VT-x extensions to run virtual
5 * machines without emulation or binary translation.
6 *
7 * Copyright (C) 2006 Qumranet, Inc.
Nicolas Kaiser9611c182010-10-06 14:23:22 +02008 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
Avi Kivity6aa8b732006-12-10 02:21:36 -08009 *
10 * Authors:
11 * Avi Kivity <avi@qumranet.com>
12 * Yaniv Kamay <yaniv@qumranet.com>
13 *
14 * This work is licensed under the terms of the GNU GPL, version 2. See
15 * the COPYING file in the top-level directory.
16 *
17 */
18
Eddie Dong85f455f2007-07-06 12:20:49 +030019#include "irq.h"
Zhang Xiantao1d737c82007-12-14 09:35:10 +080020#include "mmu.h"
Avi Kivitye4956062007-06-28 14:15:57 -040021
Avi Kivityedf88412007-12-16 11:02:48 +020022#include <linux/kvm_host.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080023#include <linux/module.h>
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +020024#include <linux/kernel.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080025#include <linux/mm.h>
26#include <linux/highmem.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040027#include <linux/sched.h>
Avi Kivityc7addb92007-09-16 18:58:32 +020028#include <linux/moduleparam.h>
Marcelo Tosatti229456f2009-06-17 09:22:14 -030029#include <linux/ftrace_event.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090030#include <linux/slab.h>
Shane Wangcafd6652010-04-29 12:09:01 -040031#include <linux/tboot.h>
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -030032#include "kvm_cache_regs.h"
Avi Kivity35920a32008-07-03 14:50:12 +030033#include "x86.h"
Avi Kivitye4956062007-06-28 14:15:57 -040034
Avi Kivity6aa8b732006-12-10 02:21:36 -080035#include <asm/io.h>
Anthony Liguori3b3be0d2006-12-13 00:33:43 -080036#include <asm/desc.h>
Eduardo Habkost13673a92008-11-17 19:03:13 -020037#include <asm/vmx.h>
Eduardo Habkost6210e372008-11-17 19:03:16 -020038#include <asm/virtext.h>
Andi Kleena0861c02009-06-08 17:37:09 +080039#include <asm/mce.h>
Dexuan Cui2acf9232010-06-10 11:27:12 +080040#include <asm/i387.h>
41#include <asm/xcr.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080042
Marcelo Tosatti229456f2009-06-17 09:22:14 -030043#include "trace.h"
44
Avi Kivity4ecac3f2008-05-13 13:23:38 +030045#define __ex(x) __kvm_handle_fault_on_reboot(x)
46
Avi Kivity6aa8b732006-12-10 02:21:36 -080047MODULE_AUTHOR("Qumranet");
48MODULE_LICENSE("GPL");
49
Avi Kivity4462d212009-03-23 17:53:37 +020050static int __read_mostly bypass_guest_pf = 1;
Avi Kivityc1f8bc02009-03-23 15:41:17 +020051module_param(bypass_guest_pf, bool, S_IRUGO);
Avi Kivityc7addb92007-09-16 18:58:32 +020052
Avi Kivity4462d212009-03-23 17:53:37 +020053static int __read_mostly enable_vpid = 1;
Avi Kivity736caef2009-03-23 17:39:48 +020054module_param_named(vpid, enable_vpid, bool, 0444);
Sheng Yang2384d2b2008-01-17 15:14:33 +080055
Avi Kivity4462d212009-03-23 17:53:37 +020056static int __read_mostly flexpriority_enabled = 1;
Avi Kivity736caef2009-03-23 17:39:48 +020057module_param_named(flexpriority, flexpriority_enabled, bool, S_IRUGO);
Avi Kivity4c9fc8e2008-03-24 18:15:14 +020058
Avi Kivity4462d212009-03-23 17:53:37 +020059static int __read_mostly enable_ept = 1;
Avi Kivity736caef2009-03-23 17:39:48 +020060module_param_named(ept, enable_ept, bool, S_IRUGO);
Sheng Yangd56f5462008-04-25 10:13:16 +080061
Nitin A Kamble3a624e22009-06-08 11:34:16 -070062static int __read_mostly enable_unrestricted_guest = 1;
63module_param_named(unrestricted_guest,
64 enable_unrestricted_guest, bool, S_IRUGO);
65
Avi Kivity4462d212009-03-23 17:53:37 +020066static int __read_mostly emulate_invalid_guest_state = 0;
Avi Kivityc1f8bc02009-03-23 15:41:17 +020067module_param(emulate_invalid_guest_state, bool, S_IRUGO);
Mohammed Gamal04fa4d32008-08-17 16:39:48 +030068
Dongxiao Xub923e622010-05-11 18:29:45 +080069static int __read_mostly vmm_exclusive = 1;
70module_param(vmm_exclusive, bool, S_IRUGO);
71
Anthony Liguori443381a2010-12-06 10:53:38 -060072static int __read_mostly yield_on_hlt = 1;
73module_param(yield_on_hlt, bool, S_IRUGO);
74
Avi Kivitycdc0e242009-12-06 17:21:14 +020075#define KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST \
76 (X86_CR0_WP | X86_CR0_NE | X86_CR0_NW | X86_CR0_CD)
77#define KVM_GUEST_CR0_MASK \
78 (KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE)
79#define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST \
Avi Kivity81231c62010-01-24 16:26:40 +020080 (X86_CR0_WP | X86_CR0_NE)
Avi Kivitycdc0e242009-12-06 17:21:14 +020081#define KVM_VM_CR0_ALWAYS_ON \
82 (KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE)
Avi Kivity4c386092009-12-07 12:26:18 +020083#define KVM_CR4_GUEST_OWNED_BITS \
84 (X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR \
85 | X86_CR4_OSXMMEXCPT)
86
Avi Kivitycdc0e242009-12-06 17:21:14 +020087#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
88#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
89
Avi Kivity78ac8b42010-04-08 18:19:35 +030090#define RMODE_GUEST_OWNED_EFLAGS_BITS (~(X86_EFLAGS_IOPL | X86_EFLAGS_VM))
91
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +080092/*
93 * These 2 parameters are used to config the controls for Pause-Loop Exiting:
94 * ple_gap: upper bound on the amount of time between two successive
95 * executions of PAUSE in a loop. Also indicate if ple enabled.
Rik van Riel00c25bc2011-01-04 09:51:33 -050096 * According to test, this time is usually smaller than 128 cycles.
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +080097 * ple_window: upper bound on the amount of time a guest is allowed to execute
98 * in a PAUSE loop. Tests indicate that most spinlocks are held for
99 * less than 2^12 cycles
100 * Time is measured based on a counter that runs at the same rate as the TSC,
101 * refer SDM volume 3b section 21.6.13 & 22.1.3.
102 */
Rik van Riel00c25bc2011-01-04 09:51:33 -0500103#define KVM_VMX_DEFAULT_PLE_GAP 128
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +0800104#define KVM_VMX_DEFAULT_PLE_WINDOW 4096
105static int ple_gap = KVM_VMX_DEFAULT_PLE_GAP;
106module_param(ple_gap, int, S_IRUGO);
107
108static int ple_window = KVM_VMX_DEFAULT_PLE_WINDOW;
109module_param(ple_window, int, S_IRUGO);
110
Avi Kivity61d2ef22010-04-28 16:40:38 +0300111#define NR_AUTOLOAD_MSRS 1
112
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400113struct vmcs {
114 u32 revision_id;
115 u32 abort;
116 char data[0];
117};
118
Avi Kivity26bb0982009-09-07 11:14:12 +0300119struct shared_msr_entry {
120 unsigned index;
121 u64 data;
Avi Kivityd5696722009-12-02 12:28:47 +0200122 u64 mask;
Avi Kivity26bb0982009-09-07 11:14:12 +0300123};
124
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400125struct vcpu_vmx {
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000126 struct kvm_vcpu vcpu;
Avi Kivity543e4242008-05-13 16:22:47 +0300127 struct list_head local_vcpus_link;
Avi Kivity313dbd492008-07-17 18:04:30 +0300128 unsigned long host_rsp;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400129 int launched;
Avi Kivity29bd8a72007-09-10 17:27:03 +0300130 u8 fail;
Avi Kivity51aa01d2010-07-20 14:31:20 +0300131 u32 exit_intr_info;
Avi Kivity1155f762007-11-22 11:30:47 +0200132 u32 idt_vectoring_info;
Avi Kivity6de12732011-03-07 12:51:22 +0200133 ulong rflags;
Avi Kivity26bb0982009-09-07 11:14:12 +0300134 struct shared_msr_entry *guest_msrs;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400135 int nmsrs;
136 int save_nmsrs;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400137#ifdef CONFIG_X86_64
Avi Kivity44ea2b12009-09-06 15:55:37 +0300138 u64 msr_host_kernel_gs_base;
139 u64 msr_guest_kernel_gs_base;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400140#endif
141 struct vmcs *vmcs;
Avi Kivity61d2ef22010-04-28 16:40:38 +0300142 struct msr_autoload {
143 unsigned nr;
144 struct vmx_msr_entry guest[NR_AUTOLOAD_MSRS];
145 struct vmx_msr_entry host[NR_AUTOLOAD_MSRS];
146 } msr_autoload;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400147 struct {
148 int loaded;
149 u16 fs_sel, gs_sel, ldt_sel;
Laurent Vivier152d3f22007-08-23 16:33:11 +0200150 int gs_ldt_reload_needed;
151 int fs_reload_needed;
Mike Dayd77c26f2007-10-08 09:02:08 -0400152 } host_state;
Avi Kivity9c8cba32007-11-22 11:42:59 +0200153 struct {
Avi Kivity7ffd92c2009-06-09 14:10:45 +0300154 int vm86_active;
Avi Kivity78ac8b42010-04-08 18:19:35 +0300155 ulong save_rflags;
Avi Kivity7ffd92c2009-06-09 14:10:45 +0300156 struct kvm_save_segment {
157 u16 selector;
158 unsigned long base;
159 u32 limit;
160 u32 ar;
161 } tr, es, ds, fs, gs;
Avi Kivity9c8cba32007-11-22 11:42:59 +0200162 } rmode;
Sheng Yang2384d2b2008-01-17 15:14:33 +0800163 int vpid;
Mohammed Gamal04fa4d32008-08-17 16:39:48 +0300164 bool emulation_required;
Jan Kiszka3b86cd92008-09-26 09:30:57 +0200165
166 /* Support for vnmi-less CPUs */
167 int soft_vnmi_blocked;
168 ktime_t entry_time;
169 s64 vnmi_blocked_time;
Andi Kleena0861c02009-06-08 17:37:09 +0800170 u32 exit_reason;
Sheng Yang4e47c7a2009-12-18 16:48:47 +0800171
172 bool rdtscp_enabled;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400173};
174
175static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu)
176{
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000177 return container_of(vcpu, struct vcpu_vmx, vcpu);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400178}
179
Sheng Yang4e1096d2008-07-06 19:16:51 +0800180static u64 construct_eptp(unsigned long root_hpa);
Dongxiao Xu4610c9c2010-05-11 18:29:48 +0800181static void kvm_cpu_vmxon(u64 addr);
182static void kvm_cpu_vmxoff(void);
Avi Kivityaff48ba2010-12-05 18:56:11 +0200183static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
Gleb Natapov776e58e2011-03-13 12:34:27 +0200184static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr);
Avi Kivity75880a02007-06-20 11:20:04 +0300185
Avi Kivity6aa8b732006-12-10 02:21:36 -0800186static DEFINE_PER_CPU(struct vmcs *, vmxarea);
187static DEFINE_PER_CPU(struct vmcs *, current_vmcs);
Avi Kivity543e4242008-05-13 16:22:47 +0300188static DEFINE_PER_CPU(struct list_head, vcpus_on_cpu);
Avi Kivity3444d7d2010-07-26 18:32:38 +0300189static DEFINE_PER_CPU(struct desc_ptr, host_gdt);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800190
Avi Kivity3e7c73e2009-02-24 21:46:19 +0200191static unsigned long *vmx_io_bitmap_a;
192static unsigned long *vmx_io_bitmap_b;
Avi Kivity58972972009-02-24 22:26:47 +0200193static unsigned long *vmx_msr_bitmap_legacy;
194static unsigned long *vmx_msr_bitmap_longmode;
He, Qingfdef3ad2007-04-30 09:45:24 +0300195
Avi Kivity110312c2010-12-21 12:54:20 +0200196static bool cpu_has_load_ia32_efer;
197
Sheng Yang2384d2b2008-01-17 15:14:33 +0800198static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS);
199static DEFINE_SPINLOCK(vmx_vpid_lock);
200
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +0300201static struct vmcs_config {
Avi Kivity6aa8b732006-12-10 02:21:36 -0800202 int size;
203 int order;
204 u32 revision_id;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +0300205 u32 pin_based_exec_ctrl;
206 u32 cpu_based_exec_ctrl;
Sheng Yangf78e0e22007-10-29 09:40:42 +0800207 u32 cpu_based_2nd_exec_ctrl;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +0300208 u32 vmexit_ctrl;
209 u32 vmentry_ctrl;
210} vmcs_config;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800211
Hannes Ederefff9e52008-11-28 17:02:06 +0100212static struct vmx_capability {
Sheng Yangd56f5462008-04-25 10:13:16 +0800213 u32 ept;
214 u32 vpid;
215} vmx_capability;
216
Avi Kivity6aa8b732006-12-10 02:21:36 -0800217#define VMX_SEGMENT_FIELD(seg) \
218 [VCPU_SREG_##seg] = { \
219 .selector = GUEST_##seg##_SELECTOR, \
220 .base = GUEST_##seg##_BASE, \
221 .limit = GUEST_##seg##_LIMIT, \
222 .ar_bytes = GUEST_##seg##_AR_BYTES, \
223 }
224
225static struct kvm_vmx_segment_field {
226 unsigned selector;
227 unsigned base;
228 unsigned limit;
229 unsigned ar_bytes;
230} kvm_vmx_segment_fields[] = {
231 VMX_SEGMENT_FIELD(CS),
232 VMX_SEGMENT_FIELD(DS),
233 VMX_SEGMENT_FIELD(ES),
234 VMX_SEGMENT_FIELD(FS),
235 VMX_SEGMENT_FIELD(GS),
236 VMX_SEGMENT_FIELD(SS),
237 VMX_SEGMENT_FIELD(TR),
238 VMX_SEGMENT_FIELD(LDTR),
239};
240
Avi Kivity26bb0982009-09-07 11:14:12 +0300241static u64 host_efer;
242
Avi Kivity6de4f3a2009-05-31 22:58:47 +0300243static void ept_save_pdptrs(struct kvm_vcpu *vcpu);
244
Avi Kivity4d56c8a2007-04-19 14:28:44 +0300245/*
Brian Gerst8c065852010-07-17 09:03:26 -0400246 * Keep MSR_STAR at the end, as setup_msrs() will try to optimize it
Avi Kivity4d56c8a2007-04-19 14:28:44 +0300247 * away by decrementing the array size.
248 */
Avi Kivity6aa8b732006-12-10 02:21:36 -0800249static const u32 vmx_msr_index[] = {
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800250#ifdef CONFIG_X86_64
Avi Kivity44ea2b12009-09-06 15:55:37 +0300251 MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR,
Avi Kivity6aa8b732006-12-10 02:21:36 -0800252#endif
Brian Gerst8c065852010-07-17 09:03:26 -0400253 MSR_EFER, MSR_TSC_AUX, MSR_STAR,
Avi Kivity6aa8b732006-12-10 02:21:36 -0800254};
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +0200255#define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800256
Gui Jianfeng31299942010-03-15 17:29:09 +0800257static inline bool is_page_fault(u32 intr_info)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800258{
259 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
260 INTR_INFO_VALID_MASK)) ==
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100261 (INTR_TYPE_HARD_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800262}
263
Gui Jianfeng31299942010-03-15 17:29:09 +0800264static inline bool is_no_device(u32 intr_info)
Anthony Liguori2ab455c2007-04-27 09:29:49 +0300265{
266 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
267 INTR_INFO_VALID_MASK)) ==
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100268 (INTR_TYPE_HARD_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK);
Anthony Liguori2ab455c2007-04-27 09:29:49 +0300269}
270
Gui Jianfeng31299942010-03-15 17:29:09 +0800271static inline bool is_invalid_opcode(u32 intr_info)
Anthony Liguori7aa81cc2007-09-17 14:57:50 -0500272{
273 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
274 INTR_INFO_VALID_MASK)) ==
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100275 (INTR_TYPE_HARD_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -0500276}
277
Gui Jianfeng31299942010-03-15 17:29:09 +0800278static inline bool is_external_interrupt(u32 intr_info)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800279{
280 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK))
281 == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK);
282}
283
Gui Jianfeng31299942010-03-15 17:29:09 +0800284static inline bool is_machine_check(u32 intr_info)
Andi Kleena0861c02009-06-08 17:37:09 +0800285{
286 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
287 INTR_INFO_VALID_MASK)) ==
288 (INTR_TYPE_HARD_EXCEPTION | MC_VECTOR | INTR_INFO_VALID_MASK);
289}
290
Gui Jianfeng31299942010-03-15 17:29:09 +0800291static inline bool cpu_has_vmx_msr_bitmap(void)
Sheng Yang25c5f222008-03-28 13:18:56 +0800292{
Sheng Yang04547152009-04-01 15:52:31 +0800293 return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS;
Sheng Yang25c5f222008-03-28 13:18:56 +0800294}
295
Gui Jianfeng31299942010-03-15 17:29:09 +0800296static inline bool cpu_has_vmx_tpr_shadow(void)
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800297{
Sheng Yang04547152009-04-01 15:52:31 +0800298 return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW;
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800299}
300
Gui Jianfeng31299942010-03-15 17:29:09 +0800301static inline bool vm_need_tpr_shadow(struct kvm *kvm)
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800302{
Sheng Yang04547152009-04-01 15:52:31 +0800303 return (cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm));
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800304}
305
Gui Jianfeng31299942010-03-15 17:29:09 +0800306static inline bool cpu_has_secondary_exec_ctrls(void)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800307{
Sheng Yang04547152009-04-01 15:52:31 +0800308 return vmcs_config.cpu_based_exec_ctrl &
309 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
Sheng Yangf78e0e22007-10-29 09:40:42 +0800310}
311
Avi Kivity774ead32007-12-26 13:57:04 +0200312static inline bool cpu_has_vmx_virtualize_apic_accesses(void)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800313{
Sheng Yang04547152009-04-01 15:52:31 +0800314 return vmcs_config.cpu_based_2nd_exec_ctrl &
315 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
316}
317
318static inline bool cpu_has_vmx_flexpriority(void)
319{
320 return cpu_has_vmx_tpr_shadow() &&
321 cpu_has_vmx_virtualize_apic_accesses();
Sheng Yangf78e0e22007-10-29 09:40:42 +0800322}
323
Marcelo Tosattie7997942009-06-11 12:07:40 -0300324static inline bool cpu_has_vmx_ept_execute_only(void)
325{
Gui Jianfeng31299942010-03-15 17:29:09 +0800326 return vmx_capability.ept & VMX_EPT_EXECUTE_ONLY_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300327}
328
329static inline bool cpu_has_vmx_eptp_uncacheable(void)
330{
Gui Jianfeng31299942010-03-15 17:29:09 +0800331 return vmx_capability.ept & VMX_EPTP_UC_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300332}
333
334static inline bool cpu_has_vmx_eptp_writeback(void)
335{
Gui Jianfeng31299942010-03-15 17:29:09 +0800336 return vmx_capability.ept & VMX_EPTP_WB_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300337}
338
339static inline bool cpu_has_vmx_ept_2m_page(void)
340{
Gui Jianfeng31299942010-03-15 17:29:09 +0800341 return vmx_capability.ept & VMX_EPT_2MB_PAGE_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300342}
343
Sheng Yang878403b2010-01-05 19:02:29 +0800344static inline bool cpu_has_vmx_ept_1g_page(void)
345{
Gui Jianfeng31299942010-03-15 17:29:09 +0800346 return vmx_capability.ept & VMX_EPT_1GB_PAGE_BIT;
Sheng Yang878403b2010-01-05 19:02:29 +0800347}
348
Sheng Yang4bc9b982010-06-02 14:05:24 +0800349static inline bool cpu_has_vmx_ept_4levels(void)
350{
351 return vmx_capability.ept & VMX_EPT_PAGE_WALK_4_BIT;
352}
353
Gui Jianfeng31299942010-03-15 17:29:09 +0800354static inline bool cpu_has_vmx_invept_individual_addr(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800355{
Gui Jianfeng31299942010-03-15 17:29:09 +0800356 return vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800357}
358
Gui Jianfeng31299942010-03-15 17:29:09 +0800359static inline bool cpu_has_vmx_invept_context(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800360{
Gui Jianfeng31299942010-03-15 17:29:09 +0800361 return vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800362}
363
Gui Jianfeng31299942010-03-15 17:29:09 +0800364static inline bool cpu_has_vmx_invept_global(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800365{
Gui Jianfeng31299942010-03-15 17:29:09 +0800366 return vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800367}
368
Gui Jianfeng518c8ae2010-06-04 08:51:39 +0800369static inline bool cpu_has_vmx_invvpid_single(void)
370{
371 return vmx_capability.vpid & VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT;
372}
373
Gui Jianfengb9d762f2010-06-07 10:32:29 +0800374static inline bool cpu_has_vmx_invvpid_global(void)
375{
376 return vmx_capability.vpid & VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT;
377}
378
Gui Jianfeng31299942010-03-15 17:29:09 +0800379static inline bool cpu_has_vmx_ept(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800380{
Sheng Yang04547152009-04-01 15:52:31 +0800381 return vmcs_config.cpu_based_2nd_exec_ctrl &
382 SECONDARY_EXEC_ENABLE_EPT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800383}
384
Gui Jianfeng31299942010-03-15 17:29:09 +0800385static inline bool cpu_has_vmx_unrestricted_guest(void)
Nitin A Kamble3a624e22009-06-08 11:34:16 -0700386{
387 return vmcs_config.cpu_based_2nd_exec_ctrl &
388 SECONDARY_EXEC_UNRESTRICTED_GUEST;
389}
390
Gui Jianfeng31299942010-03-15 17:29:09 +0800391static inline bool cpu_has_vmx_ple(void)
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +0800392{
393 return vmcs_config.cpu_based_2nd_exec_ctrl &
394 SECONDARY_EXEC_PAUSE_LOOP_EXITING;
395}
396
Gui Jianfeng31299942010-03-15 17:29:09 +0800397static inline bool vm_need_virtualize_apic_accesses(struct kvm *kvm)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800398{
Gui Jianfeng6d3e4352010-01-29 15:36:59 +0800399 return flexpriority_enabled && irqchip_in_kernel(kvm);
Sheng Yangf78e0e22007-10-29 09:40:42 +0800400}
401
Gui Jianfeng31299942010-03-15 17:29:09 +0800402static inline bool cpu_has_vmx_vpid(void)
Sheng Yang2384d2b2008-01-17 15:14:33 +0800403{
Sheng Yang04547152009-04-01 15:52:31 +0800404 return vmcs_config.cpu_based_2nd_exec_ctrl &
405 SECONDARY_EXEC_ENABLE_VPID;
Sheng Yang2384d2b2008-01-17 15:14:33 +0800406}
407
Gui Jianfeng31299942010-03-15 17:29:09 +0800408static inline bool cpu_has_vmx_rdtscp(void)
Sheng Yang4e47c7a2009-12-18 16:48:47 +0800409{
410 return vmcs_config.cpu_based_2nd_exec_ctrl &
411 SECONDARY_EXEC_RDTSCP;
412}
413
Gui Jianfeng31299942010-03-15 17:29:09 +0800414static inline bool cpu_has_virtual_nmis(void)
Sheng Yangf08864b2008-05-15 18:23:25 +0800415{
416 return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS;
417}
418
Sheng Yangf5f48ee2010-06-30 12:25:15 +0800419static inline bool cpu_has_vmx_wbinvd_exit(void)
420{
421 return vmcs_config.cpu_based_2nd_exec_ctrl &
422 SECONDARY_EXEC_WBINVD_EXITING;
423}
424
Sheng Yang04547152009-04-01 15:52:31 +0800425static inline bool report_flexpriority(void)
426{
427 return flexpriority_enabled;
428}
429
Rusty Russell8b9cf982007-07-30 16:31:43 +1000430static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr)
Avi Kivity7725f0b2006-12-13 00:34:01 -0800431{
432 int i;
433
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400434 for (i = 0; i < vmx->nmsrs; ++i)
Avi Kivity26bb0982009-09-07 11:14:12 +0300435 if (vmx_msr_index[vmx->guest_msrs[i].index] == msr)
Eddie Donga75beee2007-05-17 18:55:15 +0300436 return i;
437 return -1;
438}
439
Sheng Yang2384d2b2008-01-17 15:14:33 +0800440static inline void __invvpid(int ext, u16 vpid, gva_t gva)
441{
442 struct {
443 u64 vpid : 16;
444 u64 rsvd : 48;
445 u64 gva;
446 } operand = { vpid, 0, gva };
447
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300448 asm volatile (__ex(ASM_VMX_INVVPID)
Sheng Yang2384d2b2008-01-17 15:14:33 +0800449 /* CF==1 or ZF==1 --> rc = -1 */
450 "; ja 1f ; ud2 ; 1:"
451 : : "a"(&operand), "c"(ext) : "cc", "memory");
452}
453
Sheng Yang14394422008-04-28 12:24:45 +0800454static inline void __invept(int ext, u64 eptp, gpa_t gpa)
455{
456 struct {
457 u64 eptp, gpa;
458 } operand = {eptp, gpa};
459
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300460 asm volatile (__ex(ASM_VMX_INVEPT)
Sheng Yang14394422008-04-28 12:24:45 +0800461 /* CF==1 or ZF==1 --> rc = -1 */
462 "; ja 1f ; ud2 ; 1:\n"
463 : : "a" (&operand), "c" (ext) : "cc", "memory");
464}
465
Avi Kivity26bb0982009-09-07 11:14:12 +0300466static struct shared_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr)
Eddie Donga75beee2007-05-17 18:55:15 +0300467{
468 int i;
469
Rusty Russell8b9cf982007-07-30 16:31:43 +1000470 i = __find_msr_index(vmx, msr);
Eddie Donga75beee2007-05-17 18:55:15 +0300471 if (i >= 0)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400472 return &vmx->guest_msrs[i];
Al Viro8b6d44c2007-02-09 16:38:40 +0000473 return NULL;
Avi Kivity7725f0b2006-12-13 00:34:01 -0800474}
475
Avi Kivity6aa8b732006-12-10 02:21:36 -0800476static void vmcs_clear(struct vmcs *vmcs)
477{
478 u64 phys_addr = __pa(vmcs);
479 u8 error;
480
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300481 asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0"
Avi Kivity16d8f722010-12-21 16:51:50 +0200482 : "=qm"(error) : "a"(&phys_addr), "m"(phys_addr)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800483 : "cc", "memory");
484 if (error)
485 printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n",
486 vmcs, phys_addr);
487}
488
Dongxiao Xu7725b892010-05-11 18:29:38 +0800489static void vmcs_load(struct vmcs *vmcs)
490{
491 u64 phys_addr = __pa(vmcs);
492 u8 error;
493
494 asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0"
Avi Kivity16d8f722010-12-21 16:51:50 +0200495 : "=qm"(error) : "a"(&phys_addr), "m"(phys_addr)
Dongxiao Xu7725b892010-05-11 18:29:38 +0800496 : "cc", "memory");
497 if (error)
498 printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n",
499 vmcs, phys_addr);
500}
501
Avi Kivity6aa8b732006-12-10 02:21:36 -0800502static void __vcpu_clear(void *arg)
503{
Rusty Russell8b9cf982007-07-30 16:31:43 +1000504 struct vcpu_vmx *vmx = arg;
Ingo Molnard3b2c332007-01-05 16:36:23 -0800505 int cpu = raw_smp_processor_id();
Avi Kivity6aa8b732006-12-10 02:21:36 -0800506
Rusty Russell8b9cf982007-07-30 16:31:43 +1000507 if (vmx->vcpu.cpu == cpu)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400508 vmcs_clear(vmx->vmcs);
509 if (per_cpu(current_vmcs, cpu) == vmx->vmcs)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800510 per_cpu(current_vmcs, cpu) = NULL;
Avi Kivity543e4242008-05-13 16:22:47 +0300511 list_del(&vmx->local_vcpus_link);
512 vmx->vcpu.cpu = -1;
513 vmx->launched = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800514}
515
Rusty Russell8b9cf982007-07-30 16:31:43 +1000516static void vcpu_clear(struct vcpu_vmx *vmx)
Avi Kivity8d0be2b2007-02-12 00:54:46 -0800517{
Avi Kivityeae5ecb2007-09-30 10:50:12 +0200518 if (vmx->vcpu.cpu == -1)
519 return;
Jens Axboe8691e5a2008-06-06 11:18:06 +0200520 smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 1);
Avi Kivity8d0be2b2007-02-12 00:54:46 -0800521}
522
Gui Jianfeng1760dd42010-06-07 10:33:27 +0800523static inline void vpid_sync_vcpu_single(struct vcpu_vmx *vmx)
Sheng Yang2384d2b2008-01-17 15:14:33 +0800524{
525 if (vmx->vpid == 0)
526 return;
527
Gui Jianfeng518c8ae2010-06-04 08:51:39 +0800528 if (cpu_has_vmx_invvpid_single())
529 __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0);
Sheng Yang2384d2b2008-01-17 15:14:33 +0800530}
531
Gui Jianfengb9d762f2010-06-07 10:32:29 +0800532static inline void vpid_sync_vcpu_global(void)
533{
534 if (cpu_has_vmx_invvpid_global())
535 __invvpid(VMX_VPID_EXTENT_ALL_CONTEXT, 0, 0);
536}
537
538static inline void vpid_sync_context(struct vcpu_vmx *vmx)
539{
540 if (cpu_has_vmx_invvpid_single())
Gui Jianfeng1760dd42010-06-07 10:33:27 +0800541 vpid_sync_vcpu_single(vmx);
Gui Jianfengb9d762f2010-06-07 10:32:29 +0800542 else
543 vpid_sync_vcpu_global();
544}
545
Sheng Yang14394422008-04-28 12:24:45 +0800546static inline void ept_sync_global(void)
547{
548 if (cpu_has_vmx_invept_global())
549 __invept(VMX_EPT_EXTENT_GLOBAL, 0, 0);
550}
551
552static inline void ept_sync_context(u64 eptp)
553{
Avi Kivity089d0342009-03-23 18:26:32 +0200554 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +0800555 if (cpu_has_vmx_invept_context())
556 __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0);
557 else
558 ept_sync_global();
559 }
560}
561
562static inline void ept_sync_individual_addr(u64 eptp, gpa_t gpa)
563{
Avi Kivity089d0342009-03-23 18:26:32 +0200564 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +0800565 if (cpu_has_vmx_invept_individual_addr())
566 __invept(VMX_EPT_EXTENT_INDIVIDUAL_ADDR,
567 eptp, gpa);
568 else
569 ept_sync_context(eptp);
570 }
571}
572
Avi Kivity6aa8b732006-12-10 02:21:36 -0800573static unsigned long vmcs_readl(unsigned long field)
574{
Avi Kivitya2956732010-12-02 17:55:23 +0200575 unsigned long value = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800576
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300577 asm volatile (__ex(ASM_VMX_VMREAD_RDX_RAX)
Avi Kivitya2956732010-12-02 17:55:23 +0200578 : "+a"(value) : "d"(field) : "cc");
Avi Kivity6aa8b732006-12-10 02:21:36 -0800579 return value;
580}
581
582static u16 vmcs_read16(unsigned long field)
583{
584 return vmcs_readl(field);
585}
586
587static u32 vmcs_read32(unsigned long field)
588{
589 return vmcs_readl(field);
590}
591
592static u64 vmcs_read64(unsigned long field)
593{
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800594#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -0800595 return vmcs_readl(field);
596#else
597 return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32);
598#endif
599}
600
Avi Kivitye52de1b2007-01-05 16:36:56 -0800601static noinline void vmwrite_error(unsigned long field, unsigned long value)
602{
603 printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n",
604 field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
605 dump_stack();
606}
607
Avi Kivity6aa8b732006-12-10 02:21:36 -0800608static void vmcs_writel(unsigned long field, unsigned long value)
609{
610 u8 error;
611
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300612 asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0"
Mike Dayd77c26f2007-10-08 09:02:08 -0400613 : "=q"(error) : "a"(value), "d"(field) : "cc");
Avi Kivitye52de1b2007-01-05 16:36:56 -0800614 if (unlikely(error))
615 vmwrite_error(field, value);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800616}
617
618static void vmcs_write16(unsigned long field, u16 value)
619{
620 vmcs_writel(field, value);
621}
622
623static void vmcs_write32(unsigned long field, u32 value)
624{
625 vmcs_writel(field, value);
626}
627
628static void vmcs_write64(unsigned long field, u64 value)
629{
Avi Kivity6aa8b732006-12-10 02:21:36 -0800630 vmcs_writel(field, value);
Avi Kivity7682f2d2008-05-12 19:25:43 +0300631#ifndef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -0800632 asm volatile ("");
633 vmcs_writel(field+1, value >> 32);
634#endif
635}
636
Anthony Liguori2ab455c2007-04-27 09:29:49 +0300637static void vmcs_clear_bits(unsigned long field, u32 mask)
638{
639 vmcs_writel(field, vmcs_readl(field) & ~mask);
640}
641
642static void vmcs_set_bits(unsigned long field, u32 mask)
643{
644 vmcs_writel(field, vmcs_readl(field) | mask);
645}
646
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300647static void update_exception_bitmap(struct kvm_vcpu *vcpu)
648{
649 u32 eb;
650
Jan Kiszkafd7373c2010-01-20 18:20:20 +0100651 eb = (1u << PF_VECTOR) | (1u << UD_VECTOR) | (1u << MC_VECTOR) |
652 (1u << NM_VECTOR) | (1u << DB_VECTOR);
653 if ((vcpu->guest_debug &
654 (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) ==
655 (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP))
656 eb |= 1u << BP_VECTOR;
Avi Kivity7ffd92c2009-06-09 14:10:45 +0300657 if (to_vmx(vcpu)->rmode.vm86_active)
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300658 eb = ~0;
Avi Kivity089d0342009-03-23 18:26:32 +0200659 if (enable_ept)
Sheng Yang14394422008-04-28 12:24:45 +0800660 eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */
Avi Kivity02daab22009-12-30 12:40:26 +0200661 if (vcpu->fpu_active)
662 eb &= ~(1u << NM_VECTOR);
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300663 vmcs_write32(EXCEPTION_BITMAP, eb);
664}
665
Avi Kivity61d2ef22010-04-28 16:40:38 +0300666static void clear_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr)
667{
668 unsigned i;
669 struct msr_autoload *m = &vmx->msr_autoload;
670
Avi Kivity110312c2010-12-21 12:54:20 +0200671 if (msr == MSR_EFER && cpu_has_load_ia32_efer) {
672 vmcs_clear_bits(VM_ENTRY_CONTROLS, VM_ENTRY_LOAD_IA32_EFER);
673 vmcs_clear_bits(VM_EXIT_CONTROLS, VM_EXIT_LOAD_IA32_EFER);
674 return;
675 }
676
Avi Kivity61d2ef22010-04-28 16:40:38 +0300677 for (i = 0; i < m->nr; ++i)
678 if (m->guest[i].index == msr)
679 break;
680
681 if (i == m->nr)
682 return;
683 --m->nr;
684 m->guest[i] = m->guest[m->nr];
685 m->host[i] = m->host[m->nr];
686 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr);
687 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr);
688}
689
690static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr,
691 u64 guest_val, u64 host_val)
692{
693 unsigned i;
694 struct msr_autoload *m = &vmx->msr_autoload;
695
Avi Kivity110312c2010-12-21 12:54:20 +0200696 if (msr == MSR_EFER && cpu_has_load_ia32_efer) {
697 vmcs_write64(GUEST_IA32_EFER, guest_val);
698 vmcs_write64(HOST_IA32_EFER, host_val);
699 vmcs_set_bits(VM_ENTRY_CONTROLS, VM_ENTRY_LOAD_IA32_EFER);
700 vmcs_set_bits(VM_EXIT_CONTROLS, VM_EXIT_LOAD_IA32_EFER);
701 return;
702 }
703
Avi Kivity61d2ef22010-04-28 16:40:38 +0300704 for (i = 0; i < m->nr; ++i)
705 if (m->guest[i].index == msr)
706 break;
707
708 if (i == m->nr) {
709 ++m->nr;
710 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr);
711 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr);
712 }
713
714 m->guest[i].index = msr;
715 m->guest[i].value = guest_val;
716 m->host[i].index = msr;
717 m->host[i].value = host_val;
718}
719
Avi Kivity33ed6322007-05-02 16:54:03 +0300720static void reload_tss(void)
721{
Avi Kivity33ed6322007-05-02 16:54:03 +0300722 /*
723 * VT restores TR but not its size. Useless.
724 */
Avi Kivityd3591922010-07-26 18:32:39 +0300725 struct desc_ptr *gdt = &__get_cpu_var(host_gdt);
Avi Kivitya5f61302008-02-20 17:57:21 +0200726 struct desc_struct *descs;
Avi Kivity33ed6322007-05-02 16:54:03 +0300727
Avi Kivityd3591922010-07-26 18:32:39 +0300728 descs = (void *)gdt->address;
Avi Kivity33ed6322007-05-02 16:54:03 +0300729 descs[GDT_ENTRY_TSS].type = 9; /* available TSS */
730 load_TR_desc();
Avi Kivity33ed6322007-05-02 16:54:03 +0300731}
732
Avi Kivity92c0d902009-10-29 11:00:16 +0200733static bool update_transition_efer(struct vcpu_vmx *vmx, int efer_offset)
Eddie Dong2cc51562007-05-21 07:28:09 +0300734{
Roel Kluin3a34a882009-08-04 02:08:45 -0700735 u64 guest_efer;
Avi Kivity51c6cf62007-08-29 03:48:05 +0300736 u64 ignore_bits;
Eddie Dong2cc51562007-05-21 07:28:09 +0300737
Avi Kivityf6801df2010-01-21 15:31:50 +0200738 guest_efer = vmx->vcpu.arch.efer;
Roel Kluin3a34a882009-08-04 02:08:45 -0700739
Avi Kivity51c6cf62007-08-29 03:48:05 +0300740 /*
741 * NX is emulated; LMA and LME handled by hardware; SCE meaninless
742 * outside long mode
743 */
744 ignore_bits = EFER_NX | EFER_SCE;
745#ifdef CONFIG_X86_64
746 ignore_bits |= EFER_LMA | EFER_LME;
747 /* SCE is meaningful only in long mode on Intel */
748 if (guest_efer & EFER_LMA)
749 ignore_bits &= ~(u64)EFER_SCE;
750#endif
Avi Kivity51c6cf62007-08-29 03:48:05 +0300751 guest_efer &= ~ignore_bits;
752 guest_efer |= host_efer & ignore_bits;
Avi Kivity26bb0982009-09-07 11:14:12 +0300753 vmx->guest_msrs[efer_offset].data = guest_efer;
Avi Kivityd5696722009-12-02 12:28:47 +0200754 vmx->guest_msrs[efer_offset].mask = ~ignore_bits;
Avi Kivity84ad33e2010-04-28 16:42:29 +0300755
756 clear_atomic_switch_msr(vmx, MSR_EFER);
757 /* On ept, can't emulate nx, and must switch nx atomically */
758 if (enable_ept && ((vmx->vcpu.arch.efer ^ host_efer) & EFER_NX)) {
759 guest_efer = vmx->vcpu.arch.efer;
760 if (!(guest_efer & EFER_LMA))
761 guest_efer &= ~EFER_LME;
762 add_atomic_switch_msr(vmx, MSR_EFER, guest_efer, host_efer);
763 return false;
764 }
765
Avi Kivity26bb0982009-09-07 11:14:12 +0300766 return true;
Avi Kivity51c6cf62007-08-29 03:48:05 +0300767}
768
Gleb Natapov2d49ec72010-02-25 12:43:09 +0200769static unsigned long segment_base(u16 selector)
770{
Avi Kivityd3591922010-07-26 18:32:39 +0300771 struct desc_ptr *gdt = &__get_cpu_var(host_gdt);
Gleb Natapov2d49ec72010-02-25 12:43:09 +0200772 struct desc_struct *d;
773 unsigned long table_base;
774 unsigned long v;
775
776 if (!(selector & ~3))
777 return 0;
778
Avi Kivityd3591922010-07-26 18:32:39 +0300779 table_base = gdt->address;
Gleb Natapov2d49ec72010-02-25 12:43:09 +0200780
781 if (selector & 4) { /* from ldt */
782 u16 ldt_selector = kvm_read_ldt();
783
784 if (!(ldt_selector & ~3))
785 return 0;
786
787 table_base = segment_base(ldt_selector);
788 }
789 d = (struct desc_struct *)(table_base + (selector & ~7));
790 v = get_desc_base(d);
791#ifdef CONFIG_X86_64
792 if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11))
793 v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32;
794#endif
795 return v;
796}
797
798static inline unsigned long kvm_read_tr_base(void)
799{
800 u16 tr;
801 asm("str %0" : "=g"(tr));
802 return segment_base(tr);
803}
804
Avi Kivity04d2cc72007-09-10 18:10:54 +0300805static void vmx_save_host_state(struct kvm_vcpu *vcpu)
Avi Kivity33ed6322007-05-02 16:54:03 +0300806{
Avi Kivity04d2cc72007-09-10 18:10:54 +0300807 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity26bb0982009-09-07 11:14:12 +0300808 int i;
Avi Kivity04d2cc72007-09-10 18:10:54 +0300809
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400810 if (vmx->host_state.loaded)
Avi Kivity33ed6322007-05-02 16:54:03 +0300811 return;
812
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400813 vmx->host_state.loaded = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +0300814 /*
815 * Set host fs and gs selectors. Unfortunately, 22.2.3 does not
816 * allow segment selectors with cpl > 0 or ti == 1.
817 */
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300818 vmx->host_state.ldt_sel = kvm_read_ldt();
Laurent Vivier152d3f22007-08-23 16:33:11 +0200819 vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel;
Avi Kivity9581d442010-10-19 16:46:55 +0200820 savesegment(fs, vmx->host_state.fs_sel);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200821 if (!(vmx->host_state.fs_sel & 7)) {
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400822 vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200823 vmx->host_state.fs_reload_needed = 0;
824 } else {
Avi Kivity33ed6322007-05-02 16:54:03 +0300825 vmcs_write16(HOST_FS_SELECTOR, 0);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200826 vmx->host_state.fs_reload_needed = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +0300827 }
Avi Kivity9581d442010-10-19 16:46:55 +0200828 savesegment(gs, vmx->host_state.gs_sel);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400829 if (!(vmx->host_state.gs_sel & 7))
830 vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300831 else {
832 vmcs_write16(HOST_GS_SELECTOR, 0);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200833 vmx->host_state.gs_ldt_reload_needed = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +0300834 }
835
836#ifdef CONFIG_X86_64
837 vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE));
838 vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE));
839#else
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400840 vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel));
841 vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel));
Avi Kivity33ed6322007-05-02 16:54:03 +0300842#endif
Avi Kivity707c0872007-05-02 17:33:43 +0300843
844#ifdef CONFIG_X86_64
Avi Kivityc8770e72010-11-11 12:37:26 +0200845 rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base);
846 if (is_long_mode(&vmx->vcpu))
Avi Kivity44ea2b12009-09-06 15:55:37 +0300847 wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base);
Avi Kivity707c0872007-05-02 17:33:43 +0300848#endif
Avi Kivity26bb0982009-09-07 11:14:12 +0300849 for (i = 0; i < vmx->save_nmsrs; ++i)
850 kvm_set_shared_msr(vmx->guest_msrs[i].index,
Avi Kivityd5696722009-12-02 12:28:47 +0200851 vmx->guest_msrs[i].data,
852 vmx->guest_msrs[i].mask);
Avi Kivity33ed6322007-05-02 16:54:03 +0300853}
854
Avi Kivitya9b21b62008-06-24 11:48:49 +0300855static void __vmx_load_host_state(struct vcpu_vmx *vmx)
Avi Kivity33ed6322007-05-02 16:54:03 +0300856{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400857 if (!vmx->host_state.loaded)
Avi Kivity33ed6322007-05-02 16:54:03 +0300858 return;
859
Avi Kivitye1beb1d2007-11-18 13:50:24 +0200860 ++vmx->vcpu.stat.host_state_reload;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400861 vmx->host_state.loaded = 0;
Avi Kivityc8770e72010-11-11 12:37:26 +0200862#ifdef CONFIG_X86_64
863 if (is_long_mode(&vmx->vcpu))
864 rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base);
865#endif
Laurent Vivier152d3f22007-08-23 16:33:11 +0200866 if (vmx->host_state.gs_ldt_reload_needed) {
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300867 kvm_load_ldt(vmx->host_state.ldt_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300868#ifdef CONFIG_X86_64
Avi Kivity9581d442010-10-19 16:46:55 +0200869 load_gs_index(vmx->host_state.gs_sel);
Avi Kivity9581d442010-10-19 16:46:55 +0200870#else
871 loadsegment(gs, vmx->host_state.gs_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300872#endif
Avi Kivity33ed6322007-05-02 16:54:03 +0300873 }
Avi Kivity0a77fe42010-10-19 18:48:35 +0200874 if (vmx->host_state.fs_reload_needed)
875 loadsegment(fs, vmx->host_state.fs_sel);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200876 reload_tss();
Avi Kivity44ea2b12009-09-06 15:55:37 +0300877#ifdef CONFIG_X86_64
Avi Kivityc8770e72010-11-11 12:37:26 +0200878 wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base);
Avi Kivity44ea2b12009-09-06 15:55:37 +0300879#endif
Avi Kivity1c11e712010-05-03 16:05:44 +0300880 if (current_thread_info()->status & TS_USEDFPU)
881 clts();
Avi Kivity3444d7d2010-07-26 18:32:38 +0300882 load_gdt(&__get_cpu_var(host_gdt));
Avi Kivity33ed6322007-05-02 16:54:03 +0300883}
884
Avi Kivitya9b21b62008-06-24 11:48:49 +0300885static void vmx_load_host_state(struct vcpu_vmx *vmx)
886{
887 preempt_disable();
888 __vmx_load_host_state(vmx);
889 preempt_enable();
890}
891
Avi Kivity6aa8b732006-12-10 02:21:36 -0800892/*
893 * Switches to specified vcpu, until a matching vcpu_put(), but assumes
894 * vcpu mutex is already taken.
895 */
Avi Kivity15ad7142007-07-11 18:17:21 +0300896static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800897{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400898 struct vcpu_vmx *vmx = to_vmx(vcpu);
Dongxiao Xu4610c9c2010-05-11 18:29:48 +0800899 u64 phys_addr = __pa(per_cpu(vmxarea, cpu));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800900
Dongxiao Xu4610c9c2010-05-11 18:29:48 +0800901 if (!vmm_exclusive)
902 kvm_cpu_vmxon(phys_addr);
903 else if (vcpu->cpu != cpu)
Rusty Russell8b9cf982007-07-30 16:31:43 +1000904 vcpu_clear(vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800905
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400906 if (per_cpu(current_vmcs, cpu) != vmx->vmcs) {
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400907 per_cpu(current_vmcs, cpu) = vmx->vmcs;
Dongxiao Xu7725b892010-05-11 18:29:38 +0800908 vmcs_load(vmx->vmcs);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800909 }
910
911 if (vcpu->cpu != cpu) {
Avi Kivityd3591922010-07-26 18:32:39 +0300912 struct desc_ptr *gdt = &__get_cpu_var(host_gdt);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800913 unsigned long sysenter_esp;
914
Avi Kivitya8eeb042010-05-10 12:34:53 +0300915 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
Dongxiao Xu92fe13b2010-05-11 18:29:42 +0800916 local_irq_disable();
917 list_add(&vmx->local_vcpus_link,
918 &per_cpu(vcpus_on_cpu, cpu));
919 local_irq_enable();
920
Avi Kivity6aa8b732006-12-10 02:21:36 -0800921 /*
922 * Linux uses per-cpu TSS and GDT, so set these when switching
923 * processors.
924 */
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300925 vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */
Avi Kivityd3591922010-07-26 18:32:39 +0300926 vmcs_writel(HOST_GDTR_BASE, gdt->address); /* 22.2.4 */
Avi Kivity6aa8b732006-12-10 02:21:36 -0800927
928 rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp);
929 vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */
930 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800931}
932
933static void vmx_vcpu_put(struct kvm_vcpu *vcpu)
934{
Avi Kivitya9b21b62008-06-24 11:48:49 +0300935 __vmx_load_host_state(to_vmx(vcpu));
Dongxiao Xu4610c9c2010-05-11 18:29:48 +0800936 if (!vmm_exclusive) {
Dongxiao Xub923e622010-05-11 18:29:45 +0800937 __vcpu_clear(to_vmx(vcpu));
Dongxiao Xu4610c9c2010-05-11 18:29:48 +0800938 kvm_cpu_vmxoff();
939 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800940}
941
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300942static void vmx_fpu_activate(struct kvm_vcpu *vcpu)
943{
Avi Kivity81231c62010-01-24 16:26:40 +0200944 ulong cr0;
945
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300946 if (vcpu->fpu_active)
947 return;
948 vcpu->fpu_active = 1;
Avi Kivity81231c62010-01-24 16:26:40 +0200949 cr0 = vmcs_readl(GUEST_CR0);
950 cr0 &= ~(X86_CR0_TS | X86_CR0_MP);
951 cr0 |= kvm_read_cr0_bits(vcpu, X86_CR0_TS | X86_CR0_MP);
952 vmcs_writel(GUEST_CR0, cr0);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300953 update_exception_bitmap(vcpu);
Avi Kivityedcafe32009-12-30 18:07:40 +0200954 vcpu->arch.cr0_guest_owned_bits = X86_CR0_TS;
955 vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300956}
957
Avi Kivityedcafe32009-12-30 18:07:40 +0200958static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu);
959
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300960static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu)
961{
Avi Kivityedcafe32009-12-30 18:07:40 +0200962 vmx_decache_cr0_guest_bits(vcpu);
Avi Kivity81231c62010-01-24 16:26:40 +0200963 vmcs_set_bits(GUEST_CR0, X86_CR0_TS | X86_CR0_MP);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300964 update_exception_bitmap(vcpu);
Avi Kivityedcafe32009-12-30 18:07:40 +0200965 vcpu->arch.cr0_guest_owned_bits = 0;
966 vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits);
967 vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300968}
969
Avi Kivity6aa8b732006-12-10 02:21:36 -0800970static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu)
971{
Avi Kivity78ac8b42010-04-08 18:19:35 +0300972 unsigned long rflags, save_rflags;
Avi Kivity345dcaa2009-08-12 15:29:37 +0300973
Avi Kivity6de12732011-03-07 12:51:22 +0200974 if (!test_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail)) {
975 __set_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail);
976 rflags = vmcs_readl(GUEST_RFLAGS);
977 if (to_vmx(vcpu)->rmode.vm86_active) {
978 rflags &= RMODE_GUEST_OWNED_EFLAGS_BITS;
979 save_rflags = to_vmx(vcpu)->rmode.save_rflags;
980 rflags |= save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS;
981 }
982 to_vmx(vcpu)->rflags = rflags;
Avi Kivity78ac8b42010-04-08 18:19:35 +0300983 }
Avi Kivity6de12732011-03-07 12:51:22 +0200984 return to_vmx(vcpu)->rflags;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800985}
986
987static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
988{
Avi Kivity6de12732011-03-07 12:51:22 +0200989 __set_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail);
990 to_vmx(vcpu)->rflags = rflags;
Avi Kivity78ac8b42010-04-08 18:19:35 +0300991 if (to_vmx(vcpu)->rmode.vm86_active) {
992 to_vmx(vcpu)->rmode.save_rflags = rflags;
Glauber de Oliveira Costa053de042008-01-30 13:31:27 +0100993 rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
Avi Kivity78ac8b42010-04-08 18:19:35 +0300994 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800995 vmcs_writel(GUEST_RFLAGS, rflags);
996}
997
Glauber Costa2809f5d2009-05-12 16:21:05 -0400998static u32 vmx_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
999{
1000 u32 interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
1001 int ret = 0;
1002
1003 if (interruptibility & GUEST_INTR_STATE_STI)
Jan Kiszka48005f62010-02-19 19:38:07 +01001004 ret |= KVM_X86_SHADOW_INT_STI;
Glauber Costa2809f5d2009-05-12 16:21:05 -04001005 if (interruptibility & GUEST_INTR_STATE_MOV_SS)
Jan Kiszka48005f62010-02-19 19:38:07 +01001006 ret |= KVM_X86_SHADOW_INT_MOV_SS;
Glauber Costa2809f5d2009-05-12 16:21:05 -04001007
1008 return ret & mask;
1009}
1010
1011static void vmx_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
1012{
1013 u32 interruptibility_old = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
1014 u32 interruptibility = interruptibility_old;
1015
1016 interruptibility &= ~(GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS);
1017
Jan Kiszka48005f62010-02-19 19:38:07 +01001018 if (mask & KVM_X86_SHADOW_INT_MOV_SS)
Glauber Costa2809f5d2009-05-12 16:21:05 -04001019 interruptibility |= GUEST_INTR_STATE_MOV_SS;
Jan Kiszka48005f62010-02-19 19:38:07 +01001020 else if (mask & KVM_X86_SHADOW_INT_STI)
Glauber Costa2809f5d2009-05-12 16:21:05 -04001021 interruptibility |= GUEST_INTR_STATE_STI;
1022
1023 if ((interruptibility != interruptibility_old))
1024 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, interruptibility);
1025}
1026
Avi Kivity6aa8b732006-12-10 02:21:36 -08001027static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
1028{
1029 unsigned long rip;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001030
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001031 rip = kvm_rip_read(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001032 rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001033 kvm_rip_write(vcpu, rip);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001034
Glauber Costa2809f5d2009-05-12 16:21:05 -04001035 /* skipping an emulated instruction also counts */
1036 vmx_set_interrupt_shadow(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001037}
1038
Anthony Liguori443381a2010-12-06 10:53:38 -06001039static void vmx_clear_hlt(struct kvm_vcpu *vcpu)
1040{
1041 /* Ensure that we clear the HLT state in the VMCS. We don't need to
1042 * explicitly skip the instruction because if the HLT state is set, then
1043 * the instruction is already executing and RIP has already been
1044 * advanced. */
1045 if (!yield_on_hlt &&
1046 vmcs_read32(GUEST_ACTIVITY_STATE) == GUEST_ACTIVITY_HLT)
1047 vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE);
1048}
1049
Avi Kivity298101d2007-11-25 13:41:11 +02001050static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
Joerg Roedelce7ddec2010-04-22 12:33:13 +02001051 bool has_error_code, u32 error_code,
1052 bool reinject)
Avi Kivity298101d2007-11-25 13:41:11 +02001053{
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001054 struct vcpu_vmx *vmx = to_vmx(vcpu);
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +01001055 u32 intr_info = nr | INTR_INFO_VALID_MASK;
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001056
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +01001057 if (has_error_code) {
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001058 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code);
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +01001059 intr_info |= INTR_INFO_DELIVER_CODE_MASK;
1060 }
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001061
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001062 if (vmx->rmode.vm86_active) {
Mohammed Gamala92601b2010-09-19 14:34:07 +02001063 if (kvm_inject_realmode_interrupt(vcpu, nr) != EMULATE_DONE)
1064 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001065 return;
1066 }
1067
Gleb Natapov66fd3f72009-05-11 13:35:50 +03001068 if (kvm_exception_is_soft(nr)) {
1069 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
1070 vmx->vcpu.arch.event_exit_inst_len);
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +01001071 intr_info |= INTR_TYPE_SOFT_EXCEPTION;
1072 } else
1073 intr_info |= INTR_TYPE_HARD_EXCEPTION;
1074
1075 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info);
Anthony Liguori443381a2010-12-06 10:53:38 -06001076 vmx_clear_hlt(vcpu);
Avi Kivity298101d2007-11-25 13:41:11 +02001077}
1078
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001079static bool vmx_rdtscp_supported(void)
1080{
1081 return cpu_has_vmx_rdtscp();
1082}
1083
Avi Kivity6aa8b732006-12-10 02:21:36 -08001084/*
Eddie Donga75beee2007-05-17 18:55:15 +03001085 * Swap MSR entry in host/guest MSR entry array.
1086 */
Rusty Russell8b9cf982007-07-30 16:31:43 +10001087static void move_msr_up(struct vcpu_vmx *vmx, int from, int to)
Eddie Donga75beee2007-05-17 18:55:15 +03001088{
Avi Kivity26bb0982009-09-07 11:14:12 +03001089 struct shared_msr_entry tmp;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001090
1091 tmp = vmx->guest_msrs[to];
1092 vmx->guest_msrs[to] = vmx->guest_msrs[from];
1093 vmx->guest_msrs[from] = tmp;
Eddie Donga75beee2007-05-17 18:55:15 +03001094}
1095
1096/*
Avi Kivitye38aea32007-04-19 13:22:48 +03001097 * Set up the vmcs to automatically save and restore system
1098 * msrs. Don't touch the 64-bit msrs if the guest is in legacy
1099 * mode, as fiddling with msrs is very expensive.
1100 */
Rusty Russell8b9cf982007-07-30 16:31:43 +10001101static void setup_msrs(struct vcpu_vmx *vmx)
Avi Kivitye38aea32007-04-19 13:22:48 +03001102{
Avi Kivity26bb0982009-09-07 11:14:12 +03001103 int save_nmsrs, index;
Avi Kivity58972972009-02-24 22:26:47 +02001104 unsigned long *msr_bitmap;
Avi Kivitye38aea32007-04-19 13:22:48 +03001105
Avi Kivity33f9c502008-02-27 16:06:57 +02001106 vmx_load_host_state(vmx);
Eddie Donga75beee2007-05-17 18:55:15 +03001107 save_nmsrs = 0;
Avi Kivity4d56c8a2007-04-19 14:28:44 +03001108#ifdef CONFIG_X86_64
Rusty Russell8b9cf982007-07-30 16:31:43 +10001109 if (is_long_mode(&vmx->vcpu)) {
Rusty Russell8b9cf982007-07-30 16:31:43 +10001110 index = __find_msr_index(vmx, MSR_SYSCALL_MASK);
Eddie Donga75beee2007-05-17 18:55:15 +03001111 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +10001112 move_msr_up(vmx, index, save_nmsrs++);
1113 index = __find_msr_index(vmx, MSR_LSTAR);
Eddie Donga75beee2007-05-17 18:55:15 +03001114 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +10001115 move_msr_up(vmx, index, save_nmsrs++);
1116 index = __find_msr_index(vmx, MSR_CSTAR);
Eddie Donga75beee2007-05-17 18:55:15 +03001117 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +10001118 move_msr_up(vmx, index, save_nmsrs++);
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001119 index = __find_msr_index(vmx, MSR_TSC_AUX);
1120 if (index >= 0 && vmx->rdtscp_enabled)
1121 move_msr_up(vmx, index, save_nmsrs++);
Eddie Donga75beee2007-05-17 18:55:15 +03001122 /*
Brian Gerst8c065852010-07-17 09:03:26 -04001123 * MSR_STAR is only needed on long mode guests, and only
Eddie Donga75beee2007-05-17 18:55:15 +03001124 * if efer.sce is enabled.
1125 */
Brian Gerst8c065852010-07-17 09:03:26 -04001126 index = __find_msr_index(vmx, MSR_STAR);
Avi Kivityf6801df2010-01-21 15:31:50 +02001127 if ((index >= 0) && (vmx->vcpu.arch.efer & EFER_SCE))
Rusty Russell8b9cf982007-07-30 16:31:43 +10001128 move_msr_up(vmx, index, save_nmsrs++);
Avi Kivity4d56c8a2007-04-19 14:28:44 +03001129 }
Eddie Donga75beee2007-05-17 18:55:15 +03001130#endif
Avi Kivity92c0d902009-10-29 11:00:16 +02001131 index = __find_msr_index(vmx, MSR_EFER);
1132 if (index >= 0 && update_transition_efer(vmx, index))
Avi Kivity26bb0982009-09-07 11:14:12 +03001133 move_msr_up(vmx, index, save_nmsrs++);
Avi Kivity4d56c8a2007-04-19 14:28:44 +03001134
Avi Kivity26bb0982009-09-07 11:14:12 +03001135 vmx->save_nmsrs = save_nmsrs;
Avi Kivity58972972009-02-24 22:26:47 +02001136
1137 if (cpu_has_vmx_msr_bitmap()) {
1138 if (is_long_mode(&vmx->vcpu))
1139 msr_bitmap = vmx_msr_bitmap_longmode;
1140 else
1141 msr_bitmap = vmx_msr_bitmap_legacy;
1142
1143 vmcs_write64(MSR_BITMAP, __pa(msr_bitmap));
1144 }
Avi Kivitye38aea32007-04-19 13:22:48 +03001145}
1146
1147/*
Avi Kivity6aa8b732006-12-10 02:21:36 -08001148 * reads and returns guest's timestamp counter "register"
1149 * guest_tsc = host_tsc + tsc_offset -- 21.3
1150 */
1151static u64 guest_read_tsc(void)
1152{
1153 u64 host_tsc, tsc_offset;
1154
1155 rdtscll(host_tsc);
1156 tsc_offset = vmcs_read64(TSC_OFFSET);
1157 return host_tsc + tsc_offset;
1158}
1159
1160/*
Zachary Amsden99e3e302010-08-19 22:07:17 -10001161 * writes 'offset' into guest's timestamp counter offset register
Avi Kivity6aa8b732006-12-10 02:21:36 -08001162 */
Zachary Amsden99e3e302010-08-19 22:07:17 -10001163static void vmx_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001164{
Zachary Amsdenf4e1b3c2010-08-19 22:07:16 -10001165 vmcs_write64(TSC_OFFSET, offset);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001166}
1167
Zachary Amsdene48672f2010-08-19 22:07:23 -10001168static void vmx_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment)
1169{
1170 u64 offset = vmcs_read64(TSC_OFFSET);
1171 vmcs_write64(TSC_OFFSET, offset + adjustment);
1172}
1173
Avi Kivity6aa8b732006-12-10 02:21:36 -08001174/*
1175 * Reads an msr value (of 'msr_index') into 'pdata'.
1176 * Returns 0 on success, non-0 otherwise.
1177 * Assumes vcpu_load() was already called.
1178 */
1179static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
1180{
1181 u64 data;
Avi Kivity26bb0982009-09-07 11:14:12 +03001182 struct shared_msr_entry *msr;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001183
1184 if (!pdata) {
1185 printk(KERN_ERR "BUG: get_msr called with NULL pdata\n");
1186 return -EINVAL;
1187 }
1188
1189 switch (msr_index) {
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001190#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001191 case MSR_FS_BASE:
1192 data = vmcs_readl(GUEST_FS_BASE);
1193 break;
1194 case MSR_GS_BASE:
1195 data = vmcs_readl(GUEST_GS_BASE);
1196 break;
Avi Kivity44ea2b12009-09-06 15:55:37 +03001197 case MSR_KERNEL_GS_BASE:
1198 vmx_load_host_state(to_vmx(vcpu));
1199 data = to_vmx(vcpu)->msr_guest_kernel_gs_base;
1200 break;
Avi Kivity26bb0982009-09-07 11:14:12 +03001201#endif
Avi Kivity6aa8b732006-12-10 02:21:36 -08001202 case MSR_EFER:
Avi Kivity3bab1f52006-12-29 16:49:48 -08001203 return kvm_get_msr_common(vcpu, msr_index, pdata);
Jaswinder Singh Rajputaf24a4e2009-05-15 18:42:05 +05301204 case MSR_IA32_TSC:
Avi Kivity6aa8b732006-12-10 02:21:36 -08001205 data = guest_read_tsc();
1206 break;
1207 case MSR_IA32_SYSENTER_CS:
1208 data = vmcs_read32(GUEST_SYSENTER_CS);
1209 break;
1210 case MSR_IA32_SYSENTER_EIP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02001211 data = vmcs_readl(GUEST_SYSENTER_EIP);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001212 break;
1213 case MSR_IA32_SYSENTER_ESP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02001214 data = vmcs_readl(GUEST_SYSENTER_ESP);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001215 break;
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001216 case MSR_TSC_AUX:
1217 if (!to_vmx(vcpu)->rdtscp_enabled)
1218 return 1;
1219 /* Otherwise falls through */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001220 default:
Avi Kivity26bb0982009-09-07 11:14:12 +03001221 vmx_load_host_state(to_vmx(vcpu));
Rusty Russell8b9cf982007-07-30 16:31:43 +10001222 msr = find_msr_entry(to_vmx(vcpu), msr_index);
Avi Kivity3bab1f52006-12-29 16:49:48 -08001223 if (msr) {
Gleb Natapov542423b2009-08-27 15:07:30 +03001224 vmx_load_host_state(to_vmx(vcpu));
Avi Kivity3bab1f52006-12-29 16:49:48 -08001225 data = msr->data;
1226 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001227 }
Avi Kivity3bab1f52006-12-29 16:49:48 -08001228 return kvm_get_msr_common(vcpu, msr_index, pdata);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001229 }
1230
1231 *pdata = data;
1232 return 0;
1233}
1234
1235/*
1236 * Writes msr value into into the appropriate "register".
1237 * Returns 0 on success, non-0 otherwise.
1238 * Assumes vcpu_load() was already called.
1239 */
1240static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
1241{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001242 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity26bb0982009-09-07 11:14:12 +03001243 struct shared_msr_entry *msr;
Eddie Dong2cc51562007-05-21 07:28:09 +03001244 int ret = 0;
1245
Avi Kivity6aa8b732006-12-10 02:21:36 -08001246 switch (msr_index) {
Avi Kivity3bab1f52006-12-29 16:49:48 -08001247 case MSR_EFER:
Avi Kivitya9b21b62008-06-24 11:48:49 +03001248 vmx_load_host_state(vmx);
Eddie Dong2cc51562007-05-21 07:28:09 +03001249 ret = kvm_set_msr_common(vcpu, msr_index, data);
Eddie Dong2cc51562007-05-21 07:28:09 +03001250 break;
Avi Kivity16175a72009-03-23 22:13:44 +02001251#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001252 case MSR_FS_BASE:
1253 vmcs_writel(GUEST_FS_BASE, data);
1254 break;
1255 case MSR_GS_BASE:
1256 vmcs_writel(GUEST_GS_BASE, data);
1257 break;
Avi Kivity44ea2b12009-09-06 15:55:37 +03001258 case MSR_KERNEL_GS_BASE:
1259 vmx_load_host_state(vmx);
1260 vmx->msr_guest_kernel_gs_base = data;
1261 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001262#endif
1263 case MSR_IA32_SYSENTER_CS:
1264 vmcs_write32(GUEST_SYSENTER_CS, data);
1265 break;
1266 case MSR_IA32_SYSENTER_EIP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02001267 vmcs_writel(GUEST_SYSENTER_EIP, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001268 break;
1269 case MSR_IA32_SYSENTER_ESP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02001270 vmcs_writel(GUEST_SYSENTER_ESP, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001271 break;
Jaswinder Singh Rajputaf24a4e2009-05-15 18:42:05 +05301272 case MSR_IA32_TSC:
Zachary Amsden99e3e302010-08-19 22:07:17 -10001273 kvm_write_tsc(vcpu, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001274 break;
Sheng Yang468d4722008-10-09 16:01:55 +08001275 case MSR_IA32_CR_PAT:
1276 if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) {
1277 vmcs_write64(GUEST_IA32_PAT, data);
1278 vcpu->arch.pat = data;
1279 break;
1280 }
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001281 ret = kvm_set_msr_common(vcpu, msr_index, data);
1282 break;
1283 case MSR_TSC_AUX:
1284 if (!vmx->rdtscp_enabled)
1285 return 1;
1286 /* Check reserved bit, higher 32 bits should be zero */
1287 if ((data >> 32) != 0)
1288 return 1;
1289 /* Otherwise falls through */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001290 default:
Rusty Russell8b9cf982007-07-30 16:31:43 +10001291 msr = find_msr_entry(vmx, msr_index);
Avi Kivity3bab1f52006-12-29 16:49:48 -08001292 if (msr) {
Gleb Natapov542423b2009-08-27 15:07:30 +03001293 vmx_load_host_state(vmx);
Avi Kivity3bab1f52006-12-29 16:49:48 -08001294 msr->data = data;
1295 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001296 }
Eddie Dong2cc51562007-05-21 07:28:09 +03001297 ret = kvm_set_msr_common(vcpu, msr_index, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001298 }
1299
Eddie Dong2cc51562007-05-21 07:28:09 +03001300 return ret;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001301}
1302
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001303static void vmx_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001304{
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001305 __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
1306 switch (reg) {
1307 case VCPU_REGS_RSP:
1308 vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP);
1309 break;
1310 case VCPU_REGS_RIP:
1311 vcpu->arch.regs[VCPU_REGS_RIP] = vmcs_readl(GUEST_RIP);
1312 break;
Avi Kivity6de4f3a2009-05-31 22:58:47 +03001313 case VCPU_EXREG_PDPTR:
1314 if (enable_ept)
1315 ept_save_pdptrs(vcpu);
1316 break;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001317 default:
1318 break;
1319 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001320}
1321
Jan Kiszka355be0b2009-10-03 00:31:21 +02001322static void set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001323{
Jan Kiszkaae675ef2008-12-15 13:52:10 +01001324 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
1325 vmcs_writel(GUEST_DR7, dbg->arch.debugreg[7]);
1326 else
1327 vmcs_writel(GUEST_DR7, vcpu->arch.dr7);
1328
Avi Kivityabd3f2d2007-05-02 17:57:40 +03001329 update_exception_bitmap(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001330}
1331
1332static __init int cpu_has_kvm_support(void)
1333{
Eduardo Habkost6210e372008-11-17 19:03:16 -02001334 return cpu_has_vmx();
Avi Kivity6aa8b732006-12-10 02:21:36 -08001335}
1336
1337static __init int vmx_disabled_by_bios(void)
1338{
1339 u64 msr;
1340
1341 rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
Shane Wangcafd6652010-04-29 12:09:01 -04001342 if (msr & FEATURE_CONTROL_LOCKED) {
Joseph Cihula23f3e992011-02-08 11:45:56 -08001343 /* launched w/ TXT and VMX disabled */
Shane Wangcafd6652010-04-29 12:09:01 -04001344 if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX)
1345 && tboot_enabled())
1346 return 1;
Joseph Cihula23f3e992011-02-08 11:45:56 -08001347 /* launched w/o TXT and VMX only enabled w/ TXT */
Shane Wangcafd6652010-04-29 12:09:01 -04001348 if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX)
Joseph Cihula23f3e992011-02-08 11:45:56 -08001349 && (msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX)
Shane Wangf9335af2010-11-17 11:40:17 +08001350 && !tboot_enabled()) {
1351 printk(KERN_WARNING "kvm: disable TXT in the BIOS or "
Joseph Cihula23f3e992011-02-08 11:45:56 -08001352 "activate TXT before enabling KVM\n");
Shane Wangcafd6652010-04-29 12:09:01 -04001353 return 1;
Shane Wangf9335af2010-11-17 11:40:17 +08001354 }
Joseph Cihula23f3e992011-02-08 11:45:56 -08001355 /* launched w/o TXT and VMX disabled */
1356 if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX)
1357 && !tboot_enabled())
1358 return 1;
Shane Wangcafd6652010-04-29 12:09:01 -04001359 }
1360
1361 return 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001362}
1363
Dongxiao Xu7725b892010-05-11 18:29:38 +08001364static void kvm_cpu_vmxon(u64 addr)
1365{
1366 asm volatile (ASM_VMX_VMXON_RAX
1367 : : "a"(&addr), "m"(addr)
1368 : "memory", "cc");
1369}
1370
Alexander Graf10474ae2009-09-15 11:37:46 +02001371static int hardware_enable(void *garbage)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001372{
1373 int cpu = raw_smp_processor_id();
1374 u64 phys_addr = __pa(per_cpu(vmxarea, cpu));
Shane Wangcafd6652010-04-29 12:09:01 -04001375 u64 old, test_bits;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001376
Alexander Graf10474ae2009-09-15 11:37:46 +02001377 if (read_cr4() & X86_CR4_VMXE)
1378 return -EBUSY;
1379
Avi Kivity543e4242008-05-13 16:22:47 +03001380 INIT_LIST_HEAD(&per_cpu(vcpus_on_cpu, cpu));
Avi Kivity6aa8b732006-12-10 02:21:36 -08001381 rdmsrl(MSR_IA32_FEATURE_CONTROL, old);
Shane Wangcafd6652010-04-29 12:09:01 -04001382
1383 test_bits = FEATURE_CONTROL_LOCKED;
1384 test_bits |= FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX;
1385 if (tboot_enabled())
1386 test_bits |= FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX;
1387
1388 if ((old & test_bits) != test_bits) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001389 /* enable and lock */
Shane Wangcafd6652010-04-29 12:09:01 -04001390 wrmsrl(MSR_IA32_FEATURE_CONTROL, old | test_bits);
1391 }
Rusty Russell66aee912007-07-17 23:34:16 +10001392 write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */
Alexander Graf10474ae2009-09-15 11:37:46 +02001393
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08001394 if (vmm_exclusive) {
1395 kvm_cpu_vmxon(phys_addr);
1396 ept_sync_global();
1397 }
Alexander Graf10474ae2009-09-15 11:37:46 +02001398
Avi Kivity3444d7d2010-07-26 18:32:38 +03001399 store_gdt(&__get_cpu_var(host_gdt));
1400
Alexander Graf10474ae2009-09-15 11:37:46 +02001401 return 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001402}
1403
Avi Kivity543e4242008-05-13 16:22:47 +03001404static void vmclear_local_vcpus(void)
1405{
1406 int cpu = raw_smp_processor_id();
1407 struct vcpu_vmx *vmx, *n;
1408
1409 list_for_each_entry_safe(vmx, n, &per_cpu(vcpus_on_cpu, cpu),
1410 local_vcpus_link)
1411 __vcpu_clear(vmx);
1412}
1413
Eduardo Habkost710ff4a2008-11-17 19:03:18 -02001414
1415/* Just like cpu_vmxoff(), but with the __kvm_handle_fault_on_reboot()
1416 * tricks.
1417 */
1418static void kvm_cpu_vmxoff(void)
1419{
1420 asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc");
Eduardo Habkost710ff4a2008-11-17 19:03:18 -02001421}
1422
Avi Kivity6aa8b732006-12-10 02:21:36 -08001423static void hardware_disable(void *garbage)
1424{
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08001425 if (vmm_exclusive) {
1426 vmclear_local_vcpus();
1427 kvm_cpu_vmxoff();
1428 }
Dongxiao Xu7725b892010-05-11 18:29:38 +08001429 write_cr4(read_cr4() & ~X86_CR4_VMXE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001430}
1431
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001432static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt,
Mike Dayd77c26f2007-10-08 09:02:08 -04001433 u32 msr, u32 *result)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001434{
1435 u32 vmx_msr_low, vmx_msr_high;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001436 u32 ctl = ctl_min | ctl_opt;
1437
1438 rdmsr(msr, vmx_msr_low, vmx_msr_high);
1439
1440 ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */
1441 ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */
1442
1443 /* Ensure minimum (required) set of control bits are supported. */
1444 if (ctl_min & ~ctl)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001445 return -EIO;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001446
1447 *result = ctl;
1448 return 0;
1449}
1450
Avi Kivity110312c2010-12-21 12:54:20 +02001451static __init bool allow_1_setting(u32 msr, u32 ctl)
1452{
1453 u32 vmx_msr_low, vmx_msr_high;
1454
1455 rdmsr(msr, vmx_msr_low, vmx_msr_high);
1456 return vmx_msr_high & ctl;
1457}
1458
Yang, Sheng002c7f72007-07-31 14:23:01 +03001459static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001460{
1461 u32 vmx_msr_low, vmx_msr_high;
Sheng Yangd56f5462008-04-25 10:13:16 +08001462 u32 min, opt, min2, opt2;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001463 u32 _pin_based_exec_control = 0;
1464 u32 _cpu_based_exec_control = 0;
Sheng Yangf78e0e22007-10-29 09:40:42 +08001465 u32 _cpu_based_2nd_exec_control = 0;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001466 u32 _vmexit_control = 0;
1467 u32 _vmentry_control = 0;
1468
1469 min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING;
Sheng Yangf08864b2008-05-15 18:23:25 +08001470 opt = PIN_BASED_VIRTUAL_NMIS;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001471 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS,
1472 &_pin_based_exec_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001473 return -EIO;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001474
Anthony Liguori443381a2010-12-06 10:53:38 -06001475 min =
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001476#ifdef CONFIG_X86_64
1477 CPU_BASED_CR8_LOAD_EXITING |
1478 CPU_BASED_CR8_STORE_EXITING |
1479#endif
Sheng Yangd56f5462008-04-25 10:13:16 +08001480 CPU_BASED_CR3_LOAD_EXITING |
1481 CPU_BASED_CR3_STORE_EXITING |
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001482 CPU_BASED_USE_IO_BITMAPS |
1483 CPU_BASED_MOV_DR_EXITING |
Marcelo Tosattia7052892008-09-23 13:18:35 -03001484 CPU_BASED_USE_TSC_OFFSETING |
Sheng Yang59708672009-12-15 13:29:54 +08001485 CPU_BASED_MWAIT_EXITING |
1486 CPU_BASED_MONITOR_EXITING |
Marcelo Tosattia7052892008-09-23 13:18:35 -03001487 CPU_BASED_INVLPG_EXITING;
Anthony Liguori443381a2010-12-06 10:53:38 -06001488
1489 if (yield_on_hlt)
1490 min |= CPU_BASED_HLT_EXITING;
1491
Sheng Yangf78e0e22007-10-29 09:40:42 +08001492 opt = CPU_BASED_TPR_SHADOW |
Sheng Yang25c5f222008-03-28 13:18:56 +08001493 CPU_BASED_USE_MSR_BITMAPS |
Sheng Yangf78e0e22007-10-29 09:40:42 +08001494 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001495 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS,
1496 &_cpu_based_exec_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001497 return -EIO;
Yang, Sheng6e5d8652007-09-12 18:03:11 +08001498#ifdef CONFIG_X86_64
1499 if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW))
1500 _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING &
1501 ~CPU_BASED_CR8_STORE_EXITING;
1502#endif
Sheng Yangf78e0e22007-10-29 09:40:42 +08001503 if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) {
Sheng Yangd56f5462008-04-25 10:13:16 +08001504 min2 = 0;
1505 opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
Sheng Yang2384d2b2008-01-17 15:14:33 +08001506 SECONDARY_EXEC_WBINVD_EXITING |
Sheng Yangd56f5462008-04-25 10:13:16 +08001507 SECONDARY_EXEC_ENABLE_VPID |
Nitin A Kamble3a624e22009-06-08 11:34:16 -07001508 SECONDARY_EXEC_ENABLE_EPT |
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08001509 SECONDARY_EXEC_UNRESTRICTED_GUEST |
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001510 SECONDARY_EXEC_PAUSE_LOOP_EXITING |
1511 SECONDARY_EXEC_RDTSCP;
Sheng Yangd56f5462008-04-25 10:13:16 +08001512 if (adjust_vmx_controls(min2, opt2,
1513 MSR_IA32_VMX_PROCBASED_CTLS2,
Sheng Yangf78e0e22007-10-29 09:40:42 +08001514 &_cpu_based_2nd_exec_control) < 0)
1515 return -EIO;
1516 }
1517#ifndef CONFIG_X86_64
1518 if (!(_cpu_based_2nd_exec_control &
1519 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES))
1520 _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW;
1521#endif
Sheng Yangd56f5462008-04-25 10:13:16 +08001522 if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) {
Marcelo Tosattia7052892008-09-23 13:18:35 -03001523 /* CR3 accesses and invlpg don't need to cause VM Exits when EPT
1524 enabled */
Gleb Natapov5fff7d22009-08-27 18:41:30 +03001525 _cpu_based_exec_control &= ~(CPU_BASED_CR3_LOAD_EXITING |
1526 CPU_BASED_CR3_STORE_EXITING |
1527 CPU_BASED_INVLPG_EXITING);
Sheng Yangd56f5462008-04-25 10:13:16 +08001528 rdmsr(MSR_IA32_VMX_EPT_VPID_CAP,
1529 vmx_capability.ept, vmx_capability.vpid);
1530 }
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001531
1532 min = 0;
1533#ifdef CONFIG_X86_64
1534 min |= VM_EXIT_HOST_ADDR_SPACE_SIZE;
1535#endif
Sheng Yang468d4722008-10-09 16:01:55 +08001536 opt = VM_EXIT_SAVE_IA32_PAT | VM_EXIT_LOAD_IA32_PAT;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001537 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS,
1538 &_vmexit_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001539 return -EIO;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001540
Sheng Yang468d4722008-10-09 16:01:55 +08001541 min = 0;
1542 opt = VM_ENTRY_LOAD_IA32_PAT;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001543 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS,
1544 &_vmentry_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001545 return -EIO;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001546
Nguyen Anh Quynhc68876f2006-12-29 16:49:54 -08001547 rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high);
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001548
1549 /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */
1550 if ((vmx_msr_high & 0x1fff) > PAGE_SIZE)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001551 return -EIO;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001552
1553#ifdef CONFIG_X86_64
1554 /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */
1555 if (vmx_msr_high & (1u<<16))
Yang, Sheng002c7f72007-07-31 14:23:01 +03001556 return -EIO;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001557#endif
1558
1559 /* Require Write-Back (WB) memory type for VMCS accesses. */
1560 if (((vmx_msr_high >> 18) & 15) != 6)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001561 return -EIO;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001562
Yang, Sheng002c7f72007-07-31 14:23:01 +03001563 vmcs_conf->size = vmx_msr_high & 0x1fff;
1564 vmcs_conf->order = get_order(vmcs_config.size);
1565 vmcs_conf->revision_id = vmx_msr_low;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001566
Yang, Sheng002c7f72007-07-31 14:23:01 +03001567 vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control;
1568 vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control;
Sheng Yangf78e0e22007-10-29 09:40:42 +08001569 vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control;
Yang, Sheng002c7f72007-07-31 14:23:01 +03001570 vmcs_conf->vmexit_ctrl = _vmexit_control;
1571 vmcs_conf->vmentry_ctrl = _vmentry_control;
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001572
Avi Kivity110312c2010-12-21 12:54:20 +02001573 cpu_has_load_ia32_efer =
1574 allow_1_setting(MSR_IA32_VMX_ENTRY_CTLS,
1575 VM_ENTRY_LOAD_IA32_EFER)
1576 && allow_1_setting(MSR_IA32_VMX_EXIT_CTLS,
1577 VM_EXIT_LOAD_IA32_EFER);
1578
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001579 return 0;
Nguyen Anh Quynhc68876f2006-12-29 16:49:54 -08001580}
Avi Kivity6aa8b732006-12-10 02:21:36 -08001581
1582static struct vmcs *alloc_vmcs_cpu(int cpu)
1583{
1584 int node = cpu_to_node(cpu);
1585 struct page *pages;
1586 struct vmcs *vmcs;
1587
Mel Gorman6484eb32009-06-16 15:31:54 -07001588 pages = alloc_pages_exact_node(node, GFP_KERNEL, vmcs_config.order);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001589 if (!pages)
1590 return NULL;
1591 vmcs = page_address(pages);
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001592 memset(vmcs, 0, vmcs_config.size);
1593 vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001594 return vmcs;
1595}
1596
1597static struct vmcs *alloc_vmcs(void)
1598{
Ingo Molnard3b2c332007-01-05 16:36:23 -08001599 return alloc_vmcs_cpu(raw_smp_processor_id());
Avi Kivity6aa8b732006-12-10 02:21:36 -08001600}
1601
1602static void free_vmcs(struct vmcs *vmcs)
1603{
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03001604 free_pages((unsigned long)vmcs, vmcs_config.order);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001605}
1606
Sam Ravnborg39959582007-06-01 00:47:13 -07001607static void free_kvm_area(void)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001608{
1609 int cpu;
1610
Zachary Amsden3230bb42009-09-29 11:38:37 -10001611 for_each_possible_cpu(cpu) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001612 free_vmcs(per_cpu(vmxarea, cpu));
Zachary Amsden3230bb42009-09-29 11:38:37 -10001613 per_cpu(vmxarea, cpu) = NULL;
1614 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001615}
1616
Avi Kivity6aa8b732006-12-10 02:21:36 -08001617static __init int alloc_kvm_area(void)
1618{
1619 int cpu;
1620
Zachary Amsden3230bb42009-09-29 11:38:37 -10001621 for_each_possible_cpu(cpu) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001622 struct vmcs *vmcs;
1623
1624 vmcs = alloc_vmcs_cpu(cpu);
1625 if (!vmcs) {
1626 free_kvm_area();
1627 return -ENOMEM;
1628 }
1629
1630 per_cpu(vmxarea, cpu) = vmcs;
1631 }
1632 return 0;
1633}
1634
1635static __init int hardware_setup(void)
1636{
Yang, Sheng002c7f72007-07-31 14:23:01 +03001637 if (setup_vmcs_config(&vmcs_config) < 0)
1638 return -EIO;
Joerg Roedel50a37eb2008-01-31 14:57:38 +01001639
1640 if (boot_cpu_has(X86_FEATURE_NX))
1641 kvm_enable_efer_bits(EFER_NX);
1642
Sheng Yang93ba03c2009-04-01 15:52:32 +08001643 if (!cpu_has_vmx_vpid())
1644 enable_vpid = 0;
1645
Sheng Yang4bc9b982010-06-02 14:05:24 +08001646 if (!cpu_has_vmx_ept() ||
1647 !cpu_has_vmx_ept_4levels()) {
Sheng Yang93ba03c2009-04-01 15:52:32 +08001648 enable_ept = 0;
Nitin A Kamble3a624e22009-06-08 11:34:16 -07001649 enable_unrestricted_guest = 0;
1650 }
1651
1652 if (!cpu_has_vmx_unrestricted_guest())
1653 enable_unrestricted_guest = 0;
Sheng Yang93ba03c2009-04-01 15:52:32 +08001654
1655 if (!cpu_has_vmx_flexpriority())
1656 flexpriority_enabled = 0;
1657
Gleb Natapov95ba8273132009-04-21 17:45:08 +03001658 if (!cpu_has_vmx_tpr_shadow())
1659 kvm_x86_ops->update_cr8_intercept = NULL;
1660
Marcelo Tosatti54dee992009-06-11 12:07:44 -03001661 if (enable_ept && !cpu_has_vmx_ept_2m_page())
1662 kvm_disable_largepages();
1663
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08001664 if (!cpu_has_vmx_ple())
1665 ple_gap = 0;
1666
Avi Kivity6aa8b732006-12-10 02:21:36 -08001667 return alloc_kvm_area();
1668}
1669
1670static __exit void hardware_unsetup(void)
1671{
1672 free_kvm_area();
1673}
1674
Avi Kivity6aa8b732006-12-10 02:21:36 -08001675static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save)
1676{
1677 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1678
Avi Kivity6af11b92007-03-19 13:18:10 +02001679 if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001680 vmcs_write16(sf->selector, save->selector);
1681 vmcs_writel(sf->base, save->base);
1682 vmcs_write32(sf->limit, save->limit);
1683 vmcs_write32(sf->ar_bytes, save->ar);
1684 } else {
1685 u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK)
1686 << AR_DPL_SHIFT;
1687 vmcs_write32(sf->ar_bytes, 0x93 | dpl);
1688 }
1689}
1690
1691static void enter_pmode(struct kvm_vcpu *vcpu)
1692{
1693 unsigned long flags;
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001694 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001695
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001696 vmx->emulation_required = 1;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001697 vmx->rmode.vm86_active = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001698
Avi Kivityd0ba64f2011-01-03 14:28:51 +02001699 vmcs_write16(GUEST_TR_SELECTOR, vmx->rmode.tr.selector);
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001700 vmcs_writel(GUEST_TR_BASE, vmx->rmode.tr.base);
1701 vmcs_write32(GUEST_TR_LIMIT, vmx->rmode.tr.limit);
1702 vmcs_write32(GUEST_TR_AR_BYTES, vmx->rmode.tr.ar);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001703
1704 flags = vmcs_readl(GUEST_RFLAGS);
Avi Kivity78ac8b42010-04-08 18:19:35 +03001705 flags &= RMODE_GUEST_OWNED_EFLAGS_BITS;
1706 flags |= vmx->rmode.save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001707 vmcs_writel(GUEST_RFLAGS, flags);
1708
Rusty Russell66aee912007-07-17 23:34:16 +10001709 vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) |
1710 (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME));
Avi Kivity6aa8b732006-12-10 02:21:36 -08001711
1712 update_exception_bitmap(vcpu);
1713
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001714 if (emulate_invalid_guest_state)
1715 return;
1716
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001717 fix_pmode_dataseg(VCPU_SREG_ES, &vmx->rmode.es);
1718 fix_pmode_dataseg(VCPU_SREG_DS, &vmx->rmode.ds);
1719 fix_pmode_dataseg(VCPU_SREG_GS, &vmx->rmode.gs);
1720 fix_pmode_dataseg(VCPU_SREG_FS, &vmx->rmode.fs);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001721
1722 vmcs_write16(GUEST_SS_SELECTOR, 0);
1723 vmcs_write32(GUEST_SS_AR_BYTES, 0x93);
1724
1725 vmcs_write16(GUEST_CS_SELECTOR,
1726 vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK);
1727 vmcs_write32(GUEST_CS_AR_BYTES, 0x9b);
1728}
1729
Mike Dayd77c26f2007-10-08 09:02:08 -04001730static gva_t rmode_tss_base(struct kvm *kvm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001731{
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08001732 if (!kvm->arch.tss_addr) {
Marcelo Tosattibc6678a2009-12-23 14:35:21 -02001733 struct kvm_memslots *slots;
1734 gfn_t base_gfn;
1735
Lai Jiangshan90d83dc2010-04-19 17:41:23 +08001736 slots = kvm_memslots(kvm);
Avi Kivityf495c6e2010-06-10 17:21:29 +03001737 base_gfn = slots->memslots[0].base_gfn +
Marcelo Tosatti46a26bf2009-12-23 14:35:16 -02001738 kvm->memslots->memslots[0].npages - 3;
Izik Eiduscbc94022007-10-25 00:29:55 +02001739 return base_gfn << PAGE_SHIFT;
1740 }
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08001741 return kvm->arch.tss_addr;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001742}
1743
1744static void fix_rmode_seg(int seg, struct kvm_save_segment *save)
1745{
1746 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1747
1748 save->selector = vmcs_read16(sf->selector);
1749 save->base = vmcs_readl(sf->base);
1750 save->limit = vmcs_read32(sf->limit);
1751 save->ar = vmcs_read32(sf->ar_bytes);
Jan Kiszka15b00f32007-11-19 10:21:45 +01001752 vmcs_write16(sf->selector, save->base >> 4);
Gleb Natapov444e8632010-12-27 17:25:04 +02001753 vmcs_write32(sf->base, save->base & 0xffff0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001754 vmcs_write32(sf->limit, 0xffff);
1755 vmcs_write32(sf->ar_bytes, 0xf3);
Gleb Natapov444e8632010-12-27 17:25:04 +02001756 if (save->base & 0xf)
1757 printk_once(KERN_WARNING "kvm: segment base is not paragraph"
1758 " aligned when entering protected mode (seg=%d)",
1759 seg);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001760}
1761
1762static void enter_rmode(struct kvm_vcpu *vcpu)
1763{
1764 unsigned long flags;
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001765 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001766
Nitin A Kamble3a624e22009-06-08 11:34:16 -07001767 if (enable_unrestricted_guest)
1768 return;
1769
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001770 vmx->emulation_required = 1;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001771 vmx->rmode.vm86_active = 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001772
Gleb Natapov776e58e2011-03-13 12:34:27 +02001773 /*
1774 * Very old userspace does not call KVM_SET_TSS_ADDR before entering
1775 * vcpu. Call it here with phys address pointing 16M below 4G.
1776 */
1777 if (!vcpu->kvm->arch.tss_addr) {
1778 printk_once(KERN_WARNING "kvm: KVM_SET_TSS_ADDR need to be "
1779 "called before entering vcpu\n");
1780 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
1781 vmx_set_tss_addr(vcpu->kvm, 0xfeffd000);
1782 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
1783 }
1784
Avi Kivityd0ba64f2011-01-03 14:28:51 +02001785 vmx->rmode.tr.selector = vmcs_read16(GUEST_TR_SELECTOR);
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001786 vmx->rmode.tr.base = vmcs_readl(GUEST_TR_BASE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001787 vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm));
1788
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001789 vmx->rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001790 vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1);
1791
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001792 vmx->rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001793 vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
1794
1795 flags = vmcs_readl(GUEST_RFLAGS);
Avi Kivity78ac8b42010-04-08 18:19:35 +03001796 vmx->rmode.save_rflags = flags;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001797
Glauber de Oliveira Costa053de042008-01-30 13:31:27 +01001798 flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001799
1800 vmcs_writel(GUEST_RFLAGS, flags);
Rusty Russell66aee912007-07-17 23:34:16 +10001801 vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001802 update_exception_bitmap(vcpu);
1803
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001804 if (emulate_invalid_guest_state)
1805 goto continue_rmode;
1806
Avi Kivity6aa8b732006-12-10 02:21:36 -08001807 vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4);
1808 vmcs_write32(GUEST_SS_LIMIT, 0xffff);
1809 vmcs_write32(GUEST_SS_AR_BYTES, 0xf3);
1810
1811 vmcs_write32(GUEST_CS_AR_BYTES, 0xf3);
Michael Riepeabacf8d2006-12-22 01:05:45 -08001812 vmcs_write32(GUEST_CS_LIMIT, 0xffff);
Avi Kivity8cb5b032007-03-20 18:40:40 +02001813 if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000)
1814 vmcs_writel(GUEST_CS_BASE, 0xf0000);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001815 vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4);
1816
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001817 fix_rmode_seg(VCPU_SREG_ES, &vmx->rmode.es);
1818 fix_rmode_seg(VCPU_SREG_DS, &vmx->rmode.ds);
1819 fix_rmode_seg(VCPU_SREG_GS, &vmx->rmode.gs);
1820 fix_rmode_seg(VCPU_SREG_FS, &vmx->rmode.fs);
Avi Kivity75880a02007-06-20 11:20:04 +03001821
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001822continue_rmode:
Eddie Dong8668a3c2007-10-10 14:26:45 +08001823 kvm_mmu_reset_context(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001824}
1825
Amit Shah401d10d2009-02-20 22:53:37 +05301826static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer)
1827{
1828 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity26bb0982009-09-07 11:14:12 +03001829 struct shared_msr_entry *msr = find_msr_entry(vmx, MSR_EFER);
1830
1831 if (!msr)
1832 return;
Amit Shah401d10d2009-02-20 22:53:37 +05301833
Avi Kivity44ea2b12009-09-06 15:55:37 +03001834 /*
1835 * Force kernel_gs_base reloading before EFER changes, as control
1836 * of this msr depends on is_long_mode().
1837 */
1838 vmx_load_host_state(to_vmx(vcpu));
Avi Kivityf6801df2010-01-21 15:31:50 +02001839 vcpu->arch.efer = efer;
Amit Shah401d10d2009-02-20 22:53:37 +05301840 if (efer & EFER_LMA) {
1841 vmcs_write32(VM_ENTRY_CONTROLS,
1842 vmcs_read32(VM_ENTRY_CONTROLS) |
1843 VM_ENTRY_IA32E_MODE);
1844 msr->data = efer;
1845 } else {
1846 vmcs_write32(VM_ENTRY_CONTROLS,
1847 vmcs_read32(VM_ENTRY_CONTROLS) &
1848 ~VM_ENTRY_IA32E_MODE);
1849
1850 msr->data = efer & ~EFER_LME;
1851 }
1852 setup_msrs(vmx);
1853}
1854
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001855#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001856
1857static void enter_lmode(struct kvm_vcpu *vcpu)
1858{
1859 u32 guest_tr_ar;
1860
1861 guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES);
1862 if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) {
1863 printk(KERN_DEBUG "%s: tss fixup for long mode. \n",
Harvey Harrisonb8688d52008-03-03 12:59:56 -08001864 __func__);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001865 vmcs_write32(GUEST_TR_AR_BYTES,
1866 (guest_tr_ar & ~AR_TYPE_MASK)
1867 | AR_TYPE_BUSY_64_TSS);
1868 }
Avi Kivityda38f4382010-07-06 11:30:49 +03001869 vmx_set_efer(vcpu, vcpu->arch.efer | EFER_LMA);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001870}
1871
1872static void exit_lmode(struct kvm_vcpu *vcpu)
1873{
Avi Kivity6aa8b732006-12-10 02:21:36 -08001874 vmcs_write32(VM_ENTRY_CONTROLS,
1875 vmcs_read32(VM_ENTRY_CONTROLS)
Li, Xin B1e4e6e02007-08-01 21:49:10 +03001876 & ~VM_ENTRY_IA32E_MODE);
Avi Kivityda38f4382010-07-06 11:30:49 +03001877 vmx_set_efer(vcpu, vcpu->arch.efer & ~EFER_LMA);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001878}
1879
1880#endif
1881
Sheng Yang2384d2b2008-01-17 15:14:33 +08001882static void vmx_flush_tlb(struct kvm_vcpu *vcpu)
1883{
Gui Jianfengb9d762f2010-06-07 10:32:29 +08001884 vpid_sync_context(to_vmx(vcpu));
Xiao Guangrongdd180b32010-07-03 16:02:42 +08001885 if (enable_ept) {
1886 if (!VALID_PAGE(vcpu->arch.mmu.root_hpa))
1887 return;
Sheng Yang4e1096d2008-07-06 19:16:51 +08001888 ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa));
Xiao Guangrongdd180b32010-07-03 16:02:42 +08001889 }
Sheng Yang2384d2b2008-01-17 15:14:33 +08001890}
1891
Avi Kivitye8467fd2009-12-29 18:43:06 +02001892static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
1893{
1894 ulong cr0_guest_owned_bits = vcpu->arch.cr0_guest_owned_bits;
1895
1896 vcpu->arch.cr0 &= ~cr0_guest_owned_bits;
1897 vcpu->arch.cr0 |= vmcs_readl(GUEST_CR0) & cr0_guest_owned_bits;
1898}
1899
Avi Kivityaff48ba2010-12-05 18:56:11 +02001900static void vmx_decache_cr3(struct kvm_vcpu *vcpu)
1901{
1902 if (enable_ept && is_paging(vcpu))
1903 vcpu->arch.cr3 = vmcs_readl(GUEST_CR3);
1904 __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail);
1905}
1906
Anthony Liguori25c4c272007-04-27 09:29:21 +03001907static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
Avi Kivity399badf2007-01-05 16:36:38 -08001908{
Avi Kivityfc78f512009-12-07 12:16:48 +02001909 ulong cr4_guest_owned_bits = vcpu->arch.cr4_guest_owned_bits;
1910
1911 vcpu->arch.cr4 &= ~cr4_guest_owned_bits;
1912 vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & cr4_guest_owned_bits;
Avi Kivity399badf2007-01-05 16:36:38 -08001913}
1914
Sheng Yang14394422008-04-28 12:24:45 +08001915static void ept_load_pdptrs(struct kvm_vcpu *vcpu)
1916{
Avi Kivity6de4f3a2009-05-31 22:58:47 +03001917 if (!test_bit(VCPU_EXREG_PDPTR,
1918 (unsigned long *)&vcpu->arch.regs_dirty))
1919 return;
1920
Sheng Yang14394422008-04-28 12:24:45 +08001921 if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) {
Joerg Roedelff03a072010-09-10 17:30:57 +02001922 vmcs_write64(GUEST_PDPTR0, vcpu->arch.mmu.pdptrs[0]);
1923 vmcs_write64(GUEST_PDPTR1, vcpu->arch.mmu.pdptrs[1]);
1924 vmcs_write64(GUEST_PDPTR2, vcpu->arch.mmu.pdptrs[2]);
1925 vmcs_write64(GUEST_PDPTR3, vcpu->arch.mmu.pdptrs[3]);
Sheng Yang14394422008-04-28 12:24:45 +08001926 }
1927}
1928
Avi Kivity8f5d5492009-05-31 18:41:29 +03001929static void ept_save_pdptrs(struct kvm_vcpu *vcpu)
1930{
1931 if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) {
Joerg Roedelff03a072010-09-10 17:30:57 +02001932 vcpu->arch.mmu.pdptrs[0] = vmcs_read64(GUEST_PDPTR0);
1933 vcpu->arch.mmu.pdptrs[1] = vmcs_read64(GUEST_PDPTR1);
1934 vcpu->arch.mmu.pdptrs[2] = vmcs_read64(GUEST_PDPTR2);
1935 vcpu->arch.mmu.pdptrs[3] = vmcs_read64(GUEST_PDPTR3);
Avi Kivity8f5d5492009-05-31 18:41:29 +03001936 }
Avi Kivity6de4f3a2009-05-31 22:58:47 +03001937
1938 __set_bit(VCPU_EXREG_PDPTR,
1939 (unsigned long *)&vcpu->arch.regs_avail);
1940 __set_bit(VCPU_EXREG_PDPTR,
1941 (unsigned long *)&vcpu->arch.regs_dirty);
Avi Kivity8f5d5492009-05-31 18:41:29 +03001942}
1943
Sheng Yang14394422008-04-28 12:24:45 +08001944static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
1945
1946static void ept_update_paging_mode_cr0(unsigned long *hw_cr0,
1947 unsigned long cr0,
1948 struct kvm_vcpu *vcpu)
1949{
Avi Kivityaff48ba2010-12-05 18:56:11 +02001950 vmx_decache_cr3(vcpu);
Sheng Yang14394422008-04-28 12:24:45 +08001951 if (!(cr0 & X86_CR0_PG)) {
1952 /* From paging/starting to nonpaging */
1953 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
Sheng Yang65267ea2008-06-18 14:43:38 +08001954 vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) |
Sheng Yang14394422008-04-28 12:24:45 +08001955 (CPU_BASED_CR3_LOAD_EXITING |
1956 CPU_BASED_CR3_STORE_EXITING));
1957 vcpu->arch.cr0 = cr0;
Avi Kivityfc78f512009-12-07 12:16:48 +02001958 vmx_set_cr4(vcpu, kvm_read_cr4(vcpu));
Sheng Yang14394422008-04-28 12:24:45 +08001959 } else if (!is_paging(vcpu)) {
1960 /* From nonpaging to paging */
1961 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
Sheng Yang65267ea2008-06-18 14:43:38 +08001962 vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) &
Sheng Yang14394422008-04-28 12:24:45 +08001963 ~(CPU_BASED_CR3_LOAD_EXITING |
1964 CPU_BASED_CR3_STORE_EXITING));
1965 vcpu->arch.cr0 = cr0;
Avi Kivityfc78f512009-12-07 12:16:48 +02001966 vmx_set_cr4(vcpu, kvm_read_cr4(vcpu));
Sheng Yang14394422008-04-28 12:24:45 +08001967 }
Sheng Yang95eb84a2009-08-19 09:52:18 +08001968
1969 if (!(cr0 & X86_CR0_WP))
1970 *hw_cr0 &= ~X86_CR0_WP;
Sheng Yang14394422008-04-28 12:24:45 +08001971}
1972
Avi Kivity6aa8b732006-12-10 02:21:36 -08001973static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
1974{
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001975 struct vcpu_vmx *vmx = to_vmx(vcpu);
Nitin A Kamble3a624e22009-06-08 11:34:16 -07001976 unsigned long hw_cr0;
1977
1978 if (enable_unrestricted_guest)
1979 hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST)
1980 | KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST;
1981 else
1982 hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK) | KVM_VM_CR0_ALWAYS_ON;
Sheng Yang14394422008-04-28 12:24:45 +08001983
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001984 if (vmx->rmode.vm86_active && (cr0 & X86_CR0_PE))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001985 enter_pmode(vcpu);
1986
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001987 if (!vmx->rmode.vm86_active && !(cr0 & X86_CR0_PE))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001988 enter_rmode(vcpu);
1989
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001990#ifdef CONFIG_X86_64
Avi Kivityf6801df2010-01-21 15:31:50 +02001991 if (vcpu->arch.efer & EFER_LME) {
Rusty Russell707d92fa2007-07-17 23:19:08 +10001992 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001993 enter_lmode(vcpu);
Rusty Russell707d92fa2007-07-17 23:19:08 +10001994 if (is_paging(vcpu) && !(cr0 & X86_CR0_PG))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001995 exit_lmode(vcpu);
1996 }
1997#endif
1998
Avi Kivity089d0342009-03-23 18:26:32 +02001999 if (enable_ept)
Sheng Yang14394422008-04-28 12:24:45 +08002000 ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu);
2001
Avi Kivity02daab22009-12-30 12:40:26 +02002002 if (!vcpu->fpu_active)
Avi Kivity81231c62010-01-24 16:26:40 +02002003 hw_cr0 |= X86_CR0_TS | X86_CR0_MP;
Avi Kivity02daab22009-12-30 12:40:26 +02002004
Avi Kivity6aa8b732006-12-10 02:21:36 -08002005 vmcs_writel(CR0_READ_SHADOW, cr0);
Sheng Yang14394422008-04-28 12:24:45 +08002006 vmcs_writel(GUEST_CR0, hw_cr0);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002007 vcpu->arch.cr0 = cr0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002008}
2009
Sheng Yang14394422008-04-28 12:24:45 +08002010static u64 construct_eptp(unsigned long root_hpa)
2011{
2012 u64 eptp;
2013
2014 /* TODO write the value reading from MSR */
2015 eptp = VMX_EPT_DEFAULT_MT |
2016 VMX_EPT_DEFAULT_GAW << VMX_EPT_GAW_EPTP_SHIFT;
2017 eptp |= (root_hpa & PAGE_MASK);
2018
2019 return eptp;
2020}
2021
Avi Kivity6aa8b732006-12-10 02:21:36 -08002022static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
2023{
Sheng Yang14394422008-04-28 12:24:45 +08002024 unsigned long guest_cr3;
2025 u64 eptp;
2026
2027 guest_cr3 = cr3;
Avi Kivity089d0342009-03-23 18:26:32 +02002028 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +08002029 eptp = construct_eptp(cr3);
2030 vmcs_write64(EPT_POINTER, eptp);
Avi Kivity9f8fe502010-12-05 17:30:00 +02002031 guest_cr3 = is_paging(vcpu) ? kvm_read_cr3(vcpu) :
Sheng Yangb927a3c2009-07-21 10:42:48 +08002032 vcpu->kvm->arch.ept_identity_map_addr;
Marcelo Tosatti7c93be442009-10-26 16:48:33 -02002033 ept_load_pdptrs(vcpu);
Sheng Yang14394422008-04-28 12:24:45 +08002034 }
2035
Sheng Yang2384d2b2008-01-17 15:14:33 +08002036 vmx_flush_tlb(vcpu);
Sheng Yang14394422008-04-28 12:24:45 +08002037 vmcs_writel(GUEST_CR3, guest_cr3);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002038}
2039
2040static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
2041{
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002042 unsigned long hw_cr4 = cr4 | (to_vmx(vcpu)->rmode.vm86_active ?
Sheng Yang14394422008-04-28 12:24:45 +08002043 KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON);
2044
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002045 vcpu->arch.cr4 = cr4;
Avi Kivitybc230082009-12-08 12:14:42 +02002046 if (enable_ept) {
2047 if (!is_paging(vcpu)) {
2048 hw_cr4 &= ~X86_CR4_PAE;
2049 hw_cr4 |= X86_CR4_PSE;
2050 } else if (!(cr4 & X86_CR4_PAE)) {
2051 hw_cr4 &= ~X86_CR4_PAE;
2052 }
2053 }
Sheng Yang14394422008-04-28 12:24:45 +08002054
2055 vmcs_writel(CR4_READ_SHADOW, cr4);
2056 vmcs_writel(GUEST_CR4, hw_cr4);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002057}
2058
Avi Kivity6aa8b732006-12-10 02:21:36 -08002059static void vmx_get_segment(struct kvm_vcpu *vcpu,
2060 struct kvm_segment *var, int seg)
2061{
Avi Kivitya9179492011-01-03 14:28:52 +02002062 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002063 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
Avi Kivitya9179492011-01-03 14:28:52 +02002064 struct kvm_save_segment *save;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002065 u32 ar;
2066
Avi Kivitya9179492011-01-03 14:28:52 +02002067 if (vmx->rmode.vm86_active
2068 && (seg == VCPU_SREG_TR || seg == VCPU_SREG_ES
2069 || seg == VCPU_SREG_DS || seg == VCPU_SREG_FS
2070 || seg == VCPU_SREG_GS)
2071 && !emulate_invalid_guest_state) {
2072 switch (seg) {
2073 case VCPU_SREG_TR: save = &vmx->rmode.tr; break;
2074 case VCPU_SREG_ES: save = &vmx->rmode.es; break;
2075 case VCPU_SREG_DS: save = &vmx->rmode.ds; break;
2076 case VCPU_SREG_FS: save = &vmx->rmode.fs; break;
2077 case VCPU_SREG_GS: save = &vmx->rmode.gs; break;
2078 default: BUG();
2079 }
2080 var->selector = save->selector;
2081 var->base = save->base;
2082 var->limit = save->limit;
2083 ar = save->ar;
2084 if (seg == VCPU_SREG_TR
2085 || var->selector == vmcs_read16(sf->selector))
2086 goto use_saved_rmode_seg;
2087 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002088 var->base = vmcs_readl(sf->base);
2089 var->limit = vmcs_read32(sf->limit);
2090 var->selector = vmcs_read16(sf->selector);
2091 ar = vmcs_read32(sf->ar_bytes);
Avi Kivitya9179492011-01-03 14:28:52 +02002092use_saved_rmode_seg:
Avi Kivity9fd4a3b2009-01-04 23:43:42 +02002093 if ((ar & AR_UNUSABLE_MASK) && !emulate_invalid_guest_state)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002094 ar = 0;
2095 var->type = ar & 15;
2096 var->s = (ar >> 4) & 1;
2097 var->dpl = (ar >> 5) & 3;
2098 var->present = (ar >> 7) & 1;
2099 var->avl = (ar >> 12) & 1;
2100 var->l = (ar >> 13) & 1;
2101 var->db = (ar >> 14) & 1;
2102 var->g = (ar >> 15) & 1;
2103 var->unusable = (ar >> 16) & 1;
2104}
2105
Avi Kivitya9179492011-01-03 14:28:52 +02002106static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg)
2107{
2108 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
2109 struct kvm_segment s;
2110
2111 if (to_vmx(vcpu)->rmode.vm86_active) {
2112 vmx_get_segment(vcpu, &s, seg);
2113 return s.base;
2114 }
2115 return vmcs_readl(sf->base);
2116}
2117
Izik Eidus2e4d2652008-03-24 19:38:34 +02002118static int vmx_get_cpl(struct kvm_vcpu *vcpu)
2119{
Avi Kivity3eeb3282010-01-21 15:31:48 +02002120 if (!is_protmode(vcpu))
Izik Eidus2e4d2652008-03-24 19:38:34 +02002121 return 0;
2122
Avi Kivityf4c63e52011-03-07 14:54:28 +02002123 if (!is_long_mode(vcpu)
2124 && (kvm_get_rflags(vcpu) & X86_EFLAGS_VM)) /* if virtual 8086 */
Izik Eidus2e4d2652008-03-24 19:38:34 +02002125 return 3;
2126
Avi Kivityeab4b8a2009-08-04 15:02:54 +03002127 return vmcs_read16(GUEST_CS_SELECTOR) & 3;
Izik Eidus2e4d2652008-03-24 19:38:34 +02002128}
2129
Avi Kivity653e3102007-05-07 10:55:37 +03002130static u32 vmx_segment_access_rights(struct kvm_segment *var)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002131{
Avi Kivity6aa8b732006-12-10 02:21:36 -08002132 u32 ar;
2133
Avi Kivity653e3102007-05-07 10:55:37 +03002134 if (var->unusable)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002135 ar = 1 << 16;
2136 else {
2137 ar = var->type & 15;
2138 ar |= (var->s & 1) << 4;
2139 ar |= (var->dpl & 3) << 5;
2140 ar |= (var->present & 1) << 7;
2141 ar |= (var->avl & 1) << 12;
2142 ar |= (var->l & 1) << 13;
2143 ar |= (var->db & 1) << 14;
2144 ar |= (var->g & 1) << 15;
2145 }
Uri Lublinf7fbf1f2006-12-13 00:34:00 -08002146 if (ar == 0) /* a 0 value means unusable */
2147 ar = AR_UNUSABLE_MASK;
Avi Kivity653e3102007-05-07 10:55:37 +03002148
2149 return ar;
2150}
2151
2152static void vmx_set_segment(struct kvm_vcpu *vcpu,
2153 struct kvm_segment *var, int seg)
2154{
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002155 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity653e3102007-05-07 10:55:37 +03002156 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
2157 u32 ar;
2158
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002159 if (vmx->rmode.vm86_active && seg == VCPU_SREG_TR) {
Gleb Natapova8ba6c22011-02-21 12:07:58 +02002160 vmcs_write16(sf->selector, var->selector);
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002161 vmx->rmode.tr.selector = var->selector;
2162 vmx->rmode.tr.base = var->base;
2163 vmx->rmode.tr.limit = var->limit;
2164 vmx->rmode.tr.ar = vmx_segment_access_rights(var);
Avi Kivity653e3102007-05-07 10:55:37 +03002165 return;
2166 }
2167 vmcs_writel(sf->base, var->base);
2168 vmcs_write32(sf->limit, var->limit);
2169 vmcs_write16(sf->selector, var->selector);
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002170 if (vmx->rmode.vm86_active && var->s) {
Avi Kivity653e3102007-05-07 10:55:37 +03002171 /*
2172 * Hack real-mode segments into vm86 compatibility.
2173 */
2174 if (var->base == 0xffff0000 && var->selector == 0xf000)
2175 vmcs_writel(sf->base, 0xf0000);
2176 ar = 0xf3;
2177 } else
2178 ar = vmx_segment_access_rights(var);
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002179
2180 /*
2181 * Fix the "Accessed" bit in AR field of segment registers for older
2182 * qemu binaries.
2183 * IA32 arch specifies that at the time of processor reset the
2184 * "Accessed" bit in the AR field of segment registers is 1. And qemu
2185 * is setting it to 0 in the usedland code. This causes invalid guest
2186 * state vmexit when "unrestricted guest" mode is turned on.
2187 * Fix for this setup issue in cpu_reset is being pushed in the qemu
2188 * tree. Newer qemu binaries with that qemu fix would not need this
2189 * kvm hack.
2190 */
2191 if (enable_unrestricted_guest && (seg != VCPU_SREG_LDTR))
2192 ar |= 0x1; /* Accessed */
2193
Avi Kivity6aa8b732006-12-10 02:21:36 -08002194 vmcs_write32(sf->ar_bytes, ar);
2195}
2196
Avi Kivity6aa8b732006-12-10 02:21:36 -08002197static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
2198{
2199 u32 ar = vmcs_read32(GUEST_CS_AR_BYTES);
2200
2201 *db = (ar >> 14) & 1;
2202 *l = (ar >> 13) & 1;
2203}
2204
Gleb Natapov89a27f42010-02-16 10:51:48 +02002205static void vmx_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002206{
Gleb Natapov89a27f42010-02-16 10:51:48 +02002207 dt->size = vmcs_read32(GUEST_IDTR_LIMIT);
2208 dt->address = vmcs_readl(GUEST_IDTR_BASE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002209}
2210
Gleb Natapov89a27f42010-02-16 10:51:48 +02002211static void vmx_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002212{
Gleb Natapov89a27f42010-02-16 10:51:48 +02002213 vmcs_write32(GUEST_IDTR_LIMIT, dt->size);
2214 vmcs_writel(GUEST_IDTR_BASE, dt->address);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002215}
2216
Gleb Natapov89a27f42010-02-16 10:51:48 +02002217static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002218{
Gleb Natapov89a27f42010-02-16 10:51:48 +02002219 dt->size = vmcs_read32(GUEST_GDTR_LIMIT);
2220 dt->address = vmcs_readl(GUEST_GDTR_BASE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002221}
2222
Gleb Natapov89a27f42010-02-16 10:51:48 +02002223static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002224{
Gleb Natapov89a27f42010-02-16 10:51:48 +02002225 vmcs_write32(GUEST_GDTR_LIMIT, dt->size);
2226 vmcs_writel(GUEST_GDTR_BASE, dt->address);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002227}
2228
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002229static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg)
2230{
2231 struct kvm_segment var;
2232 u32 ar;
2233
2234 vmx_get_segment(vcpu, &var, seg);
2235 ar = vmx_segment_access_rights(&var);
2236
2237 if (var.base != (var.selector << 4))
2238 return false;
2239 if (var.limit != 0xffff)
2240 return false;
2241 if (ar != 0xf3)
2242 return false;
2243
2244 return true;
2245}
2246
2247static bool code_segment_valid(struct kvm_vcpu *vcpu)
2248{
2249 struct kvm_segment cs;
2250 unsigned int cs_rpl;
2251
2252 vmx_get_segment(vcpu, &cs, VCPU_SREG_CS);
2253 cs_rpl = cs.selector & SELECTOR_RPL_MASK;
2254
Avi Kivity1872a3f2009-01-04 23:26:52 +02002255 if (cs.unusable)
2256 return false;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002257 if (~cs.type & (AR_TYPE_CODE_MASK|AR_TYPE_ACCESSES_MASK))
2258 return false;
2259 if (!cs.s)
2260 return false;
Avi Kivity1872a3f2009-01-04 23:26:52 +02002261 if (cs.type & AR_TYPE_WRITEABLE_MASK) {
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002262 if (cs.dpl > cs_rpl)
2263 return false;
Avi Kivity1872a3f2009-01-04 23:26:52 +02002264 } else {
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002265 if (cs.dpl != cs_rpl)
2266 return false;
2267 }
2268 if (!cs.present)
2269 return false;
2270
2271 /* TODO: Add Reserved field check, this'll require a new member in the kvm_segment_field structure */
2272 return true;
2273}
2274
2275static bool stack_segment_valid(struct kvm_vcpu *vcpu)
2276{
2277 struct kvm_segment ss;
2278 unsigned int ss_rpl;
2279
2280 vmx_get_segment(vcpu, &ss, VCPU_SREG_SS);
2281 ss_rpl = ss.selector & SELECTOR_RPL_MASK;
2282
Avi Kivity1872a3f2009-01-04 23:26:52 +02002283 if (ss.unusable)
2284 return true;
2285 if (ss.type != 3 && ss.type != 7)
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002286 return false;
2287 if (!ss.s)
2288 return false;
2289 if (ss.dpl != ss_rpl) /* DPL != RPL */
2290 return false;
2291 if (!ss.present)
2292 return false;
2293
2294 return true;
2295}
2296
2297static bool data_segment_valid(struct kvm_vcpu *vcpu, int seg)
2298{
2299 struct kvm_segment var;
2300 unsigned int rpl;
2301
2302 vmx_get_segment(vcpu, &var, seg);
2303 rpl = var.selector & SELECTOR_RPL_MASK;
2304
Avi Kivity1872a3f2009-01-04 23:26:52 +02002305 if (var.unusable)
2306 return true;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002307 if (!var.s)
2308 return false;
2309 if (!var.present)
2310 return false;
2311 if (~var.type & (AR_TYPE_CODE_MASK|AR_TYPE_WRITEABLE_MASK)) {
2312 if (var.dpl < rpl) /* DPL < RPL */
2313 return false;
2314 }
2315
2316 /* TODO: Add other members to kvm_segment_field to allow checking for other access
2317 * rights flags
2318 */
2319 return true;
2320}
2321
2322static bool tr_valid(struct kvm_vcpu *vcpu)
2323{
2324 struct kvm_segment tr;
2325
2326 vmx_get_segment(vcpu, &tr, VCPU_SREG_TR);
2327
Avi Kivity1872a3f2009-01-04 23:26:52 +02002328 if (tr.unusable)
2329 return false;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002330 if (tr.selector & SELECTOR_TI_MASK) /* TI = 1 */
2331 return false;
Avi Kivity1872a3f2009-01-04 23:26:52 +02002332 if (tr.type != 3 && tr.type != 11) /* TODO: Check if guest is in IA32e mode */
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002333 return false;
2334 if (!tr.present)
2335 return false;
2336
2337 return true;
2338}
2339
2340static bool ldtr_valid(struct kvm_vcpu *vcpu)
2341{
2342 struct kvm_segment ldtr;
2343
2344 vmx_get_segment(vcpu, &ldtr, VCPU_SREG_LDTR);
2345
Avi Kivity1872a3f2009-01-04 23:26:52 +02002346 if (ldtr.unusable)
2347 return true;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002348 if (ldtr.selector & SELECTOR_TI_MASK) /* TI = 1 */
2349 return false;
2350 if (ldtr.type != 2)
2351 return false;
2352 if (!ldtr.present)
2353 return false;
2354
2355 return true;
2356}
2357
2358static bool cs_ss_rpl_check(struct kvm_vcpu *vcpu)
2359{
2360 struct kvm_segment cs, ss;
2361
2362 vmx_get_segment(vcpu, &cs, VCPU_SREG_CS);
2363 vmx_get_segment(vcpu, &ss, VCPU_SREG_SS);
2364
2365 return ((cs.selector & SELECTOR_RPL_MASK) ==
2366 (ss.selector & SELECTOR_RPL_MASK));
2367}
2368
2369/*
2370 * Check if guest state is valid. Returns true if valid, false if
2371 * not.
2372 * We assume that registers are always usable
2373 */
2374static bool guest_state_valid(struct kvm_vcpu *vcpu)
2375{
2376 /* real mode guest state checks */
Avi Kivity3eeb3282010-01-21 15:31:48 +02002377 if (!is_protmode(vcpu)) {
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002378 if (!rmode_segment_valid(vcpu, VCPU_SREG_CS))
2379 return false;
2380 if (!rmode_segment_valid(vcpu, VCPU_SREG_SS))
2381 return false;
2382 if (!rmode_segment_valid(vcpu, VCPU_SREG_DS))
2383 return false;
2384 if (!rmode_segment_valid(vcpu, VCPU_SREG_ES))
2385 return false;
2386 if (!rmode_segment_valid(vcpu, VCPU_SREG_FS))
2387 return false;
2388 if (!rmode_segment_valid(vcpu, VCPU_SREG_GS))
2389 return false;
2390 } else {
2391 /* protected mode guest state checks */
2392 if (!cs_ss_rpl_check(vcpu))
2393 return false;
2394 if (!code_segment_valid(vcpu))
2395 return false;
2396 if (!stack_segment_valid(vcpu))
2397 return false;
2398 if (!data_segment_valid(vcpu, VCPU_SREG_DS))
2399 return false;
2400 if (!data_segment_valid(vcpu, VCPU_SREG_ES))
2401 return false;
2402 if (!data_segment_valid(vcpu, VCPU_SREG_FS))
2403 return false;
2404 if (!data_segment_valid(vcpu, VCPU_SREG_GS))
2405 return false;
2406 if (!tr_valid(vcpu))
2407 return false;
2408 if (!ldtr_valid(vcpu))
2409 return false;
2410 }
2411 /* TODO:
2412 * - Add checks on RIP
2413 * - Add checks on RFLAGS
2414 */
2415
2416 return true;
2417}
2418
Mike Dayd77c26f2007-10-08 09:02:08 -04002419static int init_rmode_tss(struct kvm *kvm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002420{
Xiao Guangrong40dcaa92011-03-09 15:41:04 +08002421 gfn_t fn;
Izik Eidus195aefd2007-10-01 22:14:18 +02002422 u16 data = 0;
Xiao Guangrong40dcaa92011-03-09 15:41:04 +08002423 int r, idx, ret = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002424
Xiao Guangrong40dcaa92011-03-09 15:41:04 +08002425 idx = srcu_read_lock(&kvm->srcu);
2426 fn = rmode_tss_base(kvm) >> PAGE_SHIFT;
Izik Eidus195aefd2007-10-01 22:14:18 +02002427 r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
2428 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002429 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02002430 data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE;
Sheng Yang464d17c2008-08-13 14:10:33 +08002431 r = kvm_write_guest_page(kvm, fn++, &data,
2432 TSS_IOPB_BASE_OFFSET, sizeof(u16));
Izik Eidus195aefd2007-10-01 22:14:18 +02002433 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002434 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02002435 r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE);
2436 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002437 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02002438 r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
2439 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002440 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02002441 data = ~0;
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002442 r = kvm_write_guest_page(kvm, fn, &data,
2443 RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1,
2444 sizeof(u8));
Izik Eidus195aefd2007-10-01 22:14:18 +02002445 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002446 goto out;
2447
2448 ret = 1;
2449out:
Xiao Guangrong40dcaa92011-03-09 15:41:04 +08002450 srcu_read_unlock(&kvm->srcu, idx);
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002451 return ret;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002452}
2453
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002454static int init_rmode_identity_map(struct kvm *kvm)
2455{
Xiao Guangrong40dcaa92011-03-09 15:41:04 +08002456 int i, idx, r, ret;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002457 pfn_t identity_map_pfn;
2458 u32 tmp;
2459
Avi Kivity089d0342009-03-23 18:26:32 +02002460 if (!enable_ept)
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002461 return 1;
2462 if (unlikely(!kvm->arch.ept_identity_pagetable)) {
2463 printk(KERN_ERR "EPT: identity-mapping pagetable "
2464 "haven't been allocated!\n");
2465 return 0;
2466 }
2467 if (likely(kvm->arch.ept_identity_pagetable_done))
2468 return 1;
2469 ret = 0;
Sheng Yangb927a3c2009-07-21 10:42:48 +08002470 identity_map_pfn = kvm->arch.ept_identity_map_addr >> PAGE_SHIFT;
Xiao Guangrong40dcaa92011-03-09 15:41:04 +08002471 idx = srcu_read_lock(&kvm->srcu);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002472 r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE);
2473 if (r < 0)
2474 goto out;
2475 /* Set up identity-mapping pagetable for EPT in real mode */
2476 for (i = 0; i < PT32_ENT_PER_PAGE; i++) {
2477 tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER |
2478 _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE);
2479 r = kvm_write_guest_page(kvm, identity_map_pfn,
2480 &tmp, i * sizeof(tmp), sizeof(tmp));
2481 if (r < 0)
2482 goto out;
2483 }
2484 kvm->arch.ept_identity_pagetable_done = true;
2485 ret = 1;
2486out:
Xiao Guangrong40dcaa92011-03-09 15:41:04 +08002487 srcu_read_unlock(&kvm->srcu, idx);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002488 return ret;
2489}
2490
Avi Kivity6aa8b732006-12-10 02:21:36 -08002491static void seg_setup(int seg)
2492{
2493 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002494 unsigned int ar;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002495
2496 vmcs_write16(sf->selector, 0);
2497 vmcs_writel(sf->base, 0);
2498 vmcs_write32(sf->limit, 0xffff);
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002499 if (enable_unrestricted_guest) {
2500 ar = 0x93;
2501 if (seg == VCPU_SREG_CS)
2502 ar |= 0x08; /* code segment */
2503 } else
2504 ar = 0xf3;
2505
2506 vmcs_write32(sf->ar_bytes, ar);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002507}
2508
Sheng Yangf78e0e22007-10-29 09:40:42 +08002509static int alloc_apic_access_page(struct kvm *kvm)
2510{
2511 struct kvm_userspace_memory_region kvm_userspace_mem;
2512 int r = 0;
2513
Marcelo Tosatti79fac952009-12-23 14:35:26 -02002514 mutex_lock(&kvm->slots_lock);
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002515 if (kvm->arch.apic_access_page)
Sheng Yangf78e0e22007-10-29 09:40:42 +08002516 goto out;
2517 kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT;
2518 kvm_userspace_mem.flags = 0;
2519 kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL;
2520 kvm_userspace_mem.memory_size = PAGE_SIZE;
2521 r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0);
2522 if (r)
2523 goto out;
Izik Eidus72dc67a62008-02-10 18:04:15 +02002524
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002525 kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00);
Sheng Yangf78e0e22007-10-29 09:40:42 +08002526out:
Marcelo Tosatti79fac952009-12-23 14:35:26 -02002527 mutex_unlock(&kvm->slots_lock);
Sheng Yangf78e0e22007-10-29 09:40:42 +08002528 return r;
2529}
2530
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002531static int alloc_identity_pagetable(struct kvm *kvm)
2532{
2533 struct kvm_userspace_memory_region kvm_userspace_mem;
2534 int r = 0;
2535
Marcelo Tosatti79fac952009-12-23 14:35:26 -02002536 mutex_lock(&kvm->slots_lock);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002537 if (kvm->arch.ept_identity_pagetable)
2538 goto out;
2539 kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT;
2540 kvm_userspace_mem.flags = 0;
Sheng Yangb927a3c2009-07-21 10:42:48 +08002541 kvm_userspace_mem.guest_phys_addr =
2542 kvm->arch.ept_identity_map_addr;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002543 kvm_userspace_mem.memory_size = PAGE_SIZE;
2544 r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0);
2545 if (r)
2546 goto out;
2547
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002548 kvm->arch.ept_identity_pagetable = gfn_to_page(kvm,
Sheng Yangb927a3c2009-07-21 10:42:48 +08002549 kvm->arch.ept_identity_map_addr >> PAGE_SHIFT);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002550out:
Marcelo Tosatti79fac952009-12-23 14:35:26 -02002551 mutex_unlock(&kvm->slots_lock);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002552 return r;
2553}
2554
Sheng Yang2384d2b2008-01-17 15:14:33 +08002555static void allocate_vpid(struct vcpu_vmx *vmx)
2556{
2557 int vpid;
2558
2559 vmx->vpid = 0;
Avi Kivity919818a2009-03-23 18:01:29 +02002560 if (!enable_vpid)
Sheng Yang2384d2b2008-01-17 15:14:33 +08002561 return;
2562 spin_lock(&vmx_vpid_lock);
2563 vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS);
2564 if (vpid < VMX_NR_VPIDS) {
2565 vmx->vpid = vpid;
2566 __set_bit(vpid, vmx_vpid_bitmap);
2567 }
2568 spin_unlock(&vmx_vpid_lock);
2569}
2570
Lai Jiangshancdbecfc2010-04-17 16:41:47 +08002571static void free_vpid(struct vcpu_vmx *vmx)
2572{
2573 if (!enable_vpid)
2574 return;
2575 spin_lock(&vmx_vpid_lock);
2576 if (vmx->vpid != 0)
2577 __clear_bit(vmx->vpid, vmx_vpid_bitmap);
2578 spin_unlock(&vmx_vpid_lock);
2579}
2580
Avi Kivity58972972009-02-24 22:26:47 +02002581static void __vmx_disable_intercept_for_msr(unsigned long *msr_bitmap, u32 msr)
Sheng Yang25c5f222008-03-28 13:18:56 +08002582{
Avi Kivity3e7c73e2009-02-24 21:46:19 +02002583 int f = sizeof(unsigned long);
Sheng Yang25c5f222008-03-28 13:18:56 +08002584
2585 if (!cpu_has_vmx_msr_bitmap())
2586 return;
2587
2588 /*
2589 * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals
2590 * have the write-low and read-high bitmap offsets the wrong way round.
2591 * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff.
2592 */
Sheng Yang25c5f222008-03-28 13:18:56 +08002593 if (msr <= 0x1fff) {
Avi Kivity3e7c73e2009-02-24 21:46:19 +02002594 __clear_bit(msr, msr_bitmap + 0x000 / f); /* read-low */
2595 __clear_bit(msr, msr_bitmap + 0x800 / f); /* write-low */
Sheng Yang25c5f222008-03-28 13:18:56 +08002596 } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) {
2597 msr &= 0x1fff;
Avi Kivity3e7c73e2009-02-24 21:46:19 +02002598 __clear_bit(msr, msr_bitmap + 0x400 / f); /* read-high */
2599 __clear_bit(msr, msr_bitmap + 0xc00 / f); /* write-high */
Sheng Yang25c5f222008-03-28 13:18:56 +08002600 }
Sheng Yang25c5f222008-03-28 13:18:56 +08002601}
2602
Avi Kivity58972972009-02-24 22:26:47 +02002603static void vmx_disable_intercept_for_msr(u32 msr, bool longmode_only)
2604{
2605 if (!longmode_only)
2606 __vmx_disable_intercept_for_msr(vmx_msr_bitmap_legacy, msr);
2607 __vmx_disable_intercept_for_msr(vmx_msr_bitmap_longmode, msr);
2608}
2609
Avi Kivity6aa8b732006-12-10 02:21:36 -08002610/*
2611 * Sets up the vmcs for emulated real mode.
2612 */
Rusty Russell8b9cf982007-07-30 16:31:43 +10002613static int vmx_vcpu_setup(struct vcpu_vmx *vmx)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002614{
Sheng Yang468d4722008-10-09 16:01:55 +08002615 u32 host_sysenter_cs, msr_low, msr_high;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002616 u32 junk;
Zachary Amsdenf4e1b3c2010-08-19 22:07:16 -10002617 u64 host_pat;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002618 unsigned long a;
Gleb Natapov89a27f42010-02-16 10:51:48 +02002619 struct desc_ptr dt;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002620 int i;
Avi Kivitycd2276a2007-05-14 20:41:13 +03002621 unsigned long kvm_vmx_return;
Yang, Sheng6e5d8652007-09-12 18:03:11 +08002622 u32 exec_control;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002623
Avi Kivity6aa8b732006-12-10 02:21:36 -08002624 /* I/O */
Avi Kivity3e7c73e2009-02-24 21:46:19 +02002625 vmcs_write64(IO_BITMAP_A, __pa(vmx_io_bitmap_a));
2626 vmcs_write64(IO_BITMAP_B, __pa(vmx_io_bitmap_b));
Avi Kivity6aa8b732006-12-10 02:21:36 -08002627
Sheng Yang25c5f222008-03-28 13:18:56 +08002628 if (cpu_has_vmx_msr_bitmap())
Avi Kivity58972972009-02-24 22:26:47 +02002629 vmcs_write64(MSR_BITMAP, __pa(vmx_msr_bitmap_legacy));
Sheng Yang25c5f222008-03-28 13:18:56 +08002630
Avi Kivity6aa8b732006-12-10 02:21:36 -08002631 vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */
2632
Avi Kivity6aa8b732006-12-10 02:21:36 -08002633 /* Control */
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03002634 vmcs_write32(PIN_BASED_VM_EXEC_CONTROL,
2635 vmcs_config.pin_based_exec_ctrl);
Yang, Sheng6e5d8652007-09-12 18:03:11 +08002636
2637 exec_control = vmcs_config.cpu_based_exec_ctrl;
2638 if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) {
2639 exec_control &= ~CPU_BASED_TPR_SHADOW;
2640#ifdef CONFIG_X86_64
2641 exec_control |= CPU_BASED_CR8_STORE_EXITING |
2642 CPU_BASED_CR8_LOAD_EXITING;
2643#endif
2644 }
Avi Kivity089d0342009-03-23 18:26:32 +02002645 if (!enable_ept)
Sheng Yangd56f5462008-04-25 10:13:16 +08002646 exec_control |= CPU_BASED_CR3_STORE_EXITING |
Marcelo Tosatti83dbc832008-10-07 17:01:27 -03002647 CPU_BASED_CR3_LOAD_EXITING |
2648 CPU_BASED_INVLPG_EXITING;
Yang, Sheng6e5d8652007-09-12 18:03:11 +08002649 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002650
Sheng Yang83ff3b92007-11-21 14:33:25 +08002651 if (cpu_has_secondary_exec_ctrls()) {
2652 exec_control = vmcs_config.cpu_based_2nd_exec_ctrl;
2653 if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
2654 exec_control &=
2655 ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
Sheng Yang2384d2b2008-01-17 15:14:33 +08002656 if (vmx->vpid == 0)
2657 exec_control &= ~SECONDARY_EXEC_ENABLE_VPID;
Sheng Yang046d8712009-11-27 16:46:26 +08002658 if (!enable_ept) {
Sheng Yangd56f5462008-04-25 10:13:16 +08002659 exec_control &= ~SECONDARY_EXEC_ENABLE_EPT;
Sheng Yang046d8712009-11-27 16:46:26 +08002660 enable_unrestricted_guest = 0;
2661 }
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002662 if (!enable_unrestricted_guest)
2663 exec_control &= ~SECONDARY_EXEC_UNRESTRICTED_GUEST;
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08002664 if (!ple_gap)
2665 exec_control &= ~SECONDARY_EXEC_PAUSE_LOOP_EXITING;
Sheng Yang83ff3b92007-11-21 14:33:25 +08002666 vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control);
2667 }
Sheng Yangf78e0e22007-10-29 09:40:42 +08002668
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08002669 if (ple_gap) {
2670 vmcs_write32(PLE_GAP, ple_gap);
2671 vmcs_write32(PLE_WINDOW, ple_window);
2672 }
2673
Avi Kivityc7addb92007-09-16 18:58:32 +02002674 vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf);
2675 vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002676 vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */
2677
Avi Kivity1c11e712010-05-03 16:05:44 +03002678 vmcs_writel(HOST_CR0, read_cr0() | X86_CR0_TS); /* 22.2.3 */
Avi Kivity6aa8b732006-12-10 02:21:36 -08002679 vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */
2680 vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */
2681
2682 vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */
2683 vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
2684 vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */
Avi Kivity9581d442010-10-19 16:46:55 +02002685 vmcs_write16(HOST_FS_SELECTOR, 0); /* 22.2.4 */
2686 vmcs_write16(HOST_GS_SELECTOR, 0); /* 22.2.4 */
Avi Kivity6aa8b732006-12-10 02:21:36 -08002687 vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
Avi Kivity05b3e0c2006-12-13 00:33:45 -08002688#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08002689 rdmsrl(MSR_FS_BASE, a);
2690 vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */
2691 rdmsrl(MSR_GS_BASE, a);
2692 vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */
2693#else
2694 vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */
2695 vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */
2696#endif
2697
2698 vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */
2699
Wei Yongjunec687982010-03-05 12:11:48 +08002700 native_store_idt(&dt);
Gleb Natapov89a27f42010-02-16 10:51:48 +02002701 vmcs_writel(HOST_IDTR_BASE, dt.address); /* 22.2.4 */
Avi Kivity6aa8b732006-12-10 02:21:36 -08002702
Mike Dayd77c26f2007-10-08 09:02:08 -04002703 asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return));
Avi Kivitycd2276a2007-05-14 20:41:13 +03002704 vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */
Eddie Dong2cc51562007-05-21 07:28:09 +03002705 vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0);
2706 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0);
Avi Kivity61d2ef22010-04-28 16:40:38 +03002707 vmcs_write64(VM_EXIT_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.host));
Eddie Dong2cc51562007-05-21 07:28:09 +03002708 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0);
Avi Kivity61d2ef22010-04-28 16:40:38 +03002709 vmcs_write64(VM_ENTRY_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.guest));
Avi Kivity6aa8b732006-12-10 02:21:36 -08002710
2711 rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk);
2712 vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs);
2713 rdmsrl(MSR_IA32_SYSENTER_ESP, a);
2714 vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */
2715 rdmsrl(MSR_IA32_SYSENTER_EIP, a);
2716 vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */
2717
Sheng Yang468d4722008-10-09 16:01:55 +08002718 if (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_PAT) {
2719 rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high);
2720 host_pat = msr_low | ((u64) msr_high << 32);
2721 vmcs_write64(HOST_IA32_PAT, host_pat);
2722 }
2723 if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) {
2724 rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high);
2725 host_pat = msr_low | ((u64) msr_high << 32);
2726 /* Write the default value follow host pat */
2727 vmcs_write64(GUEST_IA32_PAT, host_pat);
2728 /* Keep arch.pat sync with GUEST_IA32_PAT */
2729 vmx->vcpu.arch.pat = host_pat;
2730 }
2731
Avi Kivity6aa8b732006-12-10 02:21:36 -08002732 for (i = 0; i < NR_VMX_MSR; ++i) {
2733 u32 index = vmx_msr_index[i];
2734 u32 data_low, data_high;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002735 int j = vmx->nmsrs;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002736
2737 if (rdmsr_safe(index, &data_low, &data_high) < 0)
2738 continue;
Avi Kivity432bd6c2007-01-31 23:48:13 -08002739 if (wrmsr_safe(index, data_low, data_high) < 0)
2740 continue;
Avi Kivity26bb0982009-09-07 11:14:12 +03002741 vmx->guest_msrs[j].index = i;
2742 vmx->guest_msrs[j].data = 0;
Avi Kivityd5696722009-12-02 12:28:47 +02002743 vmx->guest_msrs[j].mask = -1ull;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002744 ++vmx->nmsrs;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002745 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002746
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03002747 vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002748
2749 /* 22.2.1, 20.8.1 */
Yang, Sheng1c3d14fe2007-07-29 11:07:42 +03002750 vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl);
2751
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002752 vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL);
Avi Kivity4c386092009-12-07 12:26:18 +02002753 vmx->vcpu.arch.cr4_guest_owned_bits = KVM_CR4_GUEST_OWNED_BITS;
Avi Kivityce03e4f2009-12-07 12:29:14 +02002754 if (enable_ept)
2755 vmx->vcpu.arch.cr4_guest_owned_bits |= X86_CR4_PGE;
Avi Kivity4c386092009-12-07 12:26:18 +02002756 vmcs_writel(CR4_GUEST_HOST_MASK, ~vmx->vcpu.arch.cr4_guest_owned_bits);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002757
Zachary Amsden99e3e302010-08-19 22:07:17 -10002758 kvm_write_tsc(&vmx->vcpu, 0);
Sheng Yangf78e0e22007-10-29 09:40:42 +08002759
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002760 return 0;
2761}
2762
2763static int vmx_vcpu_reset(struct kvm_vcpu *vcpu)
2764{
2765 struct vcpu_vmx *vmx = to_vmx(vcpu);
2766 u64 msr;
Xiao Guangrong4b9d3a02010-06-08 10:15:51 +08002767 int ret;
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002768
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002769 vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP));
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002770
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002771 vmx->rmode.vm86_active = 0;
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002772
Jan Kiszka3b86cd92008-09-26 09:30:57 +02002773 vmx->soft_vnmi_blocked = 0;
2774
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002775 vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val();
Avi Kivity2d3ad1f2008-02-24 11:20:43 +02002776 kvm_set_cr8(&vmx->vcpu, 0);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002777 msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
Gleb Natapovc5af89b2009-06-09 15:56:26 +03002778 if (kvm_vcpu_is_bsp(&vmx->vcpu))
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002779 msr |= MSR_IA32_APICBASE_BSP;
2780 kvm_set_apic_base(&vmx->vcpu, msr);
2781
Jan Kiszka10ab25c2010-05-25 16:01:50 +02002782 ret = fx_init(&vmx->vcpu);
2783 if (ret != 0)
2784 goto out;
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002785
Avi Kivity5706be02008-08-20 15:07:31 +03002786 seg_setup(VCPU_SREG_CS);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002787 /*
2788 * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode
2789 * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh.
2790 */
Gleb Natapovc5af89b2009-06-09 15:56:26 +03002791 if (kvm_vcpu_is_bsp(&vmx->vcpu)) {
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002792 vmcs_write16(GUEST_CS_SELECTOR, 0xf000);
2793 vmcs_writel(GUEST_CS_BASE, 0x000f0000);
2794 } else {
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002795 vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8);
2796 vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002797 }
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002798
2799 seg_setup(VCPU_SREG_DS);
2800 seg_setup(VCPU_SREG_ES);
2801 seg_setup(VCPU_SREG_FS);
2802 seg_setup(VCPU_SREG_GS);
2803 seg_setup(VCPU_SREG_SS);
2804
2805 vmcs_write16(GUEST_TR_SELECTOR, 0);
2806 vmcs_writel(GUEST_TR_BASE, 0);
2807 vmcs_write32(GUEST_TR_LIMIT, 0xffff);
2808 vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
2809
2810 vmcs_write16(GUEST_LDTR_SELECTOR, 0);
2811 vmcs_writel(GUEST_LDTR_BASE, 0);
2812 vmcs_write32(GUEST_LDTR_LIMIT, 0xffff);
2813 vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082);
2814
2815 vmcs_write32(GUEST_SYSENTER_CS, 0);
2816 vmcs_writel(GUEST_SYSENTER_ESP, 0);
2817 vmcs_writel(GUEST_SYSENTER_EIP, 0);
2818
2819 vmcs_writel(GUEST_RFLAGS, 0x02);
Gleb Natapovc5af89b2009-06-09 15:56:26 +03002820 if (kvm_vcpu_is_bsp(&vmx->vcpu))
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002821 kvm_rip_write(vcpu, 0xfff0);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002822 else
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002823 kvm_rip_write(vcpu, 0);
2824 kvm_register_write(vcpu, VCPU_REGS_RSP, 0);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002825
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002826 vmcs_writel(GUEST_DR7, 0x400);
2827
2828 vmcs_writel(GUEST_GDTR_BASE, 0);
2829 vmcs_write32(GUEST_GDTR_LIMIT, 0xffff);
2830
2831 vmcs_writel(GUEST_IDTR_BASE, 0);
2832 vmcs_write32(GUEST_IDTR_LIMIT, 0xffff);
2833
Anthony Liguori443381a2010-12-06 10:53:38 -06002834 vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002835 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0);
2836 vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0);
2837
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002838 /* Special registers */
2839 vmcs_write64(GUEST_IA32_DEBUGCTL, 0);
2840
2841 setup_msrs(vmx);
2842
Avi Kivity6aa8b732006-12-10 02:21:36 -08002843 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */
2844
Sheng Yangf78e0e22007-10-29 09:40:42 +08002845 if (cpu_has_vmx_tpr_shadow()) {
2846 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0);
2847 if (vm_need_tpr_shadow(vmx->vcpu.kvm))
2848 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR,
Takuya Yoshikawaafc20182011-03-05 12:40:20 +09002849 __pa(vmx->vcpu.arch.apic->regs));
Sheng Yangf78e0e22007-10-29 09:40:42 +08002850 vmcs_write32(TPR_THRESHOLD, 0);
2851 }
2852
2853 if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
2854 vmcs_write64(APIC_ACCESS_ADDR,
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002855 page_to_phys(vmx->vcpu.kvm->arch.apic_access_page));
Avi Kivity6aa8b732006-12-10 02:21:36 -08002856
Sheng Yang2384d2b2008-01-17 15:14:33 +08002857 if (vmx->vpid != 0)
2858 vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid);
2859
Eduardo Habkostfa400522009-10-24 02:49:58 -02002860 vmx->vcpu.arch.cr0 = X86_CR0_NW | X86_CR0_CD | X86_CR0_ET;
Avi Kivity4d4ec082009-12-29 18:07:30 +02002861 vmx_set_cr0(&vmx->vcpu, kvm_read_cr0(vcpu)); /* enter rmode */
Rusty Russell8b9cf982007-07-30 16:31:43 +10002862 vmx_set_cr4(&vmx->vcpu, 0);
Rusty Russell8b9cf982007-07-30 16:31:43 +10002863 vmx_set_efer(&vmx->vcpu, 0);
Rusty Russell8b9cf982007-07-30 16:31:43 +10002864 vmx_fpu_activate(&vmx->vcpu);
2865 update_exception_bitmap(&vmx->vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002866
Gui Jianfengb9d762f2010-06-07 10:32:29 +08002867 vpid_sync_context(vmx);
Sheng Yang2384d2b2008-01-17 15:14:33 +08002868
Marcelo Tosatti3200f402008-03-29 20:17:59 -03002869 ret = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002870
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03002871 /* HACK: Don't enable emulation on guest boot/reset */
2872 vmx->emulation_required = 0;
2873
Avi Kivity6aa8b732006-12-10 02:21:36 -08002874out:
2875 return ret;
2876}
2877
Jan Kiszka3b86cd92008-09-26 09:30:57 +02002878static void enable_irq_window(struct kvm_vcpu *vcpu)
2879{
2880 u32 cpu_based_vm_exec_control;
2881
2882 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
2883 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
2884 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
2885}
2886
2887static void enable_nmi_window(struct kvm_vcpu *vcpu)
2888{
2889 u32 cpu_based_vm_exec_control;
2890
2891 if (!cpu_has_virtual_nmis()) {
2892 enable_irq_window(vcpu);
2893 return;
2894 }
2895
Avi Kivity30bd0c42010-11-01 23:20:48 +02002896 if (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_STI) {
2897 enable_irq_window(vcpu);
2898 return;
2899 }
Jan Kiszka3b86cd92008-09-26 09:30:57 +02002900 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
2901 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING;
2902 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
2903}
2904
Gleb Natapov66fd3f72009-05-11 13:35:50 +03002905static void vmx_inject_irq(struct kvm_vcpu *vcpu)
Eddie Dong85f455f2007-07-06 12:20:49 +03002906{
Avi Kivity9c8cba32007-11-22 11:42:59 +02002907 struct vcpu_vmx *vmx = to_vmx(vcpu);
Gleb Natapov66fd3f72009-05-11 13:35:50 +03002908 uint32_t intr;
2909 int irq = vcpu->arch.interrupt.nr;
Avi Kivity9c8cba32007-11-22 11:42:59 +02002910
Marcelo Tosatti229456f2009-06-17 09:22:14 -03002911 trace_kvm_inj_virq(irq);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04002912
Avi Kivityfa89a8172008-09-01 15:57:51 +03002913 ++vcpu->stat.irq_injections;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002914 if (vmx->rmode.vm86_active) {
Mohammed Gamala92601b2010-09-19 14:34:07 +02002915 if (kvm_inject_realmode_interrupt(vcpu, irq) != EMULATE_DONE)
2916 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
Eddie Dong85f455f2007-07-06 12:20:49 +03002917 return;
2918 }
Gleb Natapov66fd3f72009-05-11 13:35:50 +03002919 intr = irq | INTR_INFO_VALID_MASK;
2920 if (vcpu->arch.interrupt.soft) {
2921 intr |= INTR_TYPE_SOFT_INTR;
2922 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
2923 vmx->vcpu.arch.event_exit_inst_len);
2924 } else
2925 intr |= INTR_TYPE_EXT_INTR;
2926 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr);
Anthony Liguori443381a2010-12-06 10:53:38 -06002927 vmx_clear_hlt(vcpu);
Eddie Dong85f455f2007-07-06 12:20:49 +03002928}
2929
Sheng Yangf08864b2008-05-15 18:23:25 +08002930static void vmx_inject_nmi(struct kvm_vcpu *vcpu)
2931{
Jan Kiszka66a5a342008-09-26 09:30:51 +02002932 struct vcpu_vmx *vmx = to_vmx(vcpu);
2933
Jan Kiszka3b86cd92008-09-26 09:30:57 +02002934 if (!cpu_has_virtual_nmis()) {
2935 /*
2936 * Tracking the NMI-blocked state in software is built upon
2937 * finding the next open IRQ window. This, in turn, depends on
2938 * well-behaving guests: They have to keep IRQs disabled at
2939 * least as long as the NMI handler runs. Otherwise we may
2940 * cause NMI nesting, maybe breaking the guest. But as this is
2941 * highly unlikely, we can live with the residual risk.
2942 */
2943 vmx->soft_vnmi_blocked = 1;
2944 vmx->vnmi_blocked_time = 0;
2945 }
2946
Jan Kiszka487b3912008-09-26 09:30:56 +02002947 ++vcpu->stat.nmi_injections;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002948 if (vmx->rmode.vm86_active) {
Mohammed Gamala92601b2010-09-19 14:34:07 +02002949 if (kvm_inject_realmode_interrupt(vcpu, NMI_VECTOR) != EMULATE_DONE)
2950 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
Jan Kiszka66a5a342008-09-26 09:30:51 +02002951 return;
2952 }
Sheng Yangf08864b2008-05-15 18:23:25 +08002953 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
2954 INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR);
Anthony Liguori443381a2010-12-06 10:53:38 -06002955 vmx_clear_hlt(vcpu);
Sheng Yangf08864b2008-05-15 18:23:25 +08002956}
2957
Gleb Natapovc4282df2009-04-21 17:45:07 +03002958static int vmx_nmi_allowed(struct kvm_vcpu *vcpu)
Jan Kiszka33f089c2008-09-26 09:30:49 +02002959{
Jan Kiszka3b86cd92008-09-26 09:30:57 +02002960 if (!cpu_has_virtual_nmis() && to_vmx(vcpu)->soft_vnmi_blocked)
Gleb Natapovc4282df2009-04-21 17:45:07 +03002961 return 0;
Jan Kiszka33f089c2008-09-26 09:30:49 +02002962
Gleb Natapovc4282df2009-04-21 17:45:07 +03002963 return !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
Avi Kivity30bd0c42010-11-01 23:20:48 +02002964 (GUEST_INTR_STATE_MOV_SS | GUEST_INTR_STATE_STI
2965 | GUEST_INTR_STATE_NMI));
Jan Kiszka33f089c2008-09-26 09:30:49 +02002966}
2967
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002968static bool vmx_get_nmi_mask(struct kvm_vcpu *vcpu)
2969{
2970 if (!cpu_has_virtual_nmis())
2971 return to_vmx(vcpu)->soft_vnmi_blocked;
Avi Kivityc332c832010-05-04 12:24:12 +03002972 return vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_NMI;
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002973}
2974
2975static void vmx_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked)
2976{
2977 struct vcpu_vmx *vmx = to_vmx(vcpu);
2978
2979 if (!cpu_has_virtual_nmis()) {
2980 if (vmx->soft_vnmi_blocked != masked) {
2981 vmx->soft_vnmi_blocked = masked;
2982 vmx->vnmi_blocked_time = 0;
2983 }
2984 } else {
2985 if (masked)
2986 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
2987 GUEST_INTR_STATE_NMI);
2988 else
2989 vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO,
2990 GUEST_INTR_STATE_NMI);
2991 }
2992}
2993
Gleb Natapov78646122009-03-23 12:12:11 +02002994static int vmx_interrupt_allowed(struct kvm_vcpu *vcpu)
2995{
Gleb Natapovc4282df2009-04-21 17:45:07 +03002996 return (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) &&
2997 !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
2998 (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS));
Gleb Natapov78646122009-03-23 12:12:11 +02002999}
3000
Izik Eiduscbc94022007-10-25 00:29:55 +02003001static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr)
3002{
3003 int ret;
3004 struct kvm_userspace_memory_region tss_mem = {
Sheng Yang6fe639792008-10-16 17:30:58 +08003005 .slot = TSS_PRIVATE_MEMSLOT,
Izik Eiduscbc94022007-10-25 00:29:55 +02003006 .guest_phys_addr = addr,
3007 .memory_size = PAGE_SIZE * 3,
3008 .flags = 0,
3009 };
3010
3011 ret = kvm_set_memory_region(kvm, &tss_mem, 0);
3012 if (ret)
3013 return ret;
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08003014 kvm->arch.tss_addr = addr;
Gleb Natapov93ea5382011-02-21 12:07:59 +02003015 if (!init_rmode_tss(kvm))
3016 return -ENOMEM;
3017
Izik Eiduscbc94022007-10-25 00:29:55 +02003018 return 0;
3019}
3020
Avi Kivity6aa8b732006-12-10 02:21:36 -08003021static int handle_rmode_exception(struct kvm_vcpu *vcpu,
3022 int vec, u32 err_code)
3023{
Nitin A Kambleb3f37702007-05-17 15:50:34 +03003024 /*
3025 * Instruction with address size override prefix opcode 0x67
3026 * Cause the #SS fault with 0 error code in VM86 mode.
3027 */
3028 if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0)
Andre Przywara51d8b662010-12-21 11:12:02 +01003029 if (emulate_instruction(vcpu, 0) == EMULATE_DONE)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003030 return 1;
Jan Kiszka77ab6db2008-07-14 12:28:51 +02003031 /*
3032 * Forward all other exceptions that are valid in real mode.
3033 * FIXME: Breaks guest debugging in real mode, needs to be fixed with
3034 * the required debugging infrastructure rework.
3035 */
3036 switch (vec) {
Jan Kiszka77ab6db2008-07-14 12:28:51 +02003037 case DB_VECTOR:
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003038 if (vcpu->guest_debug &
3039 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
3040 return 0;
3041 kvm_queue_exception(vcpu, vec);
3042 return 1;
Jan Kiszka77ab6db2008-07-14 12:28:51 +02003043 case BP_VECTOR:
Jan Kiszkac573cd222010-02-23 17:47:53 +01003044 /*
3045 * Update instruction length as we may reinject the exception
3046 * from user space while in guest debugging mode.
3047 */
3048 to_vmx(vcpu)->vcpu.arch.event_exit_inst_len =
3049 vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003050 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
3051 return 0;
3052 /* fall through */
3053 case DE_VECTOR:
Jan Kiszka77ab6db2008-07-14 12:28:51 +02003054 case OF_VECTOR:
3055 case BR_VECTOR:
3056 case UD_VECTOR:
3057 case DF_VECTOR:
3058 case SS_VECTOR:
3059 case GP_VECTOR:
3060 case MF_VECTOR:
3061 kvm_queue_exception(vcpu, vec);
3062 return 1;
3063 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003064 return 0;
3065}
3066
Andi Kleena0861c02009-06-08 17:37:09 +08003067/*
3068 * Trigger machine check on the host. We assume all the MSRs are already set up
3069 * by the CPU and that we still run on the same CPU as the MCE occurred on.
3070 * We pass a fake environment to the machine check handler because we want
3071 * the guest to be always treated like user space, no matter what context
3072 * it used internally.
3073 */
3074static void kvm_machine_check(void)
3075{
3076#if defined(CONFIG_X86_MCE) && defined(CONFIG_X86_64)
3077 struct pt_regs regs = {
3078 .cs = 3, /* Fake ring 3 no matter what the guest ran on */
3079 .flags = X86_EFLAGS_IF,
3080 };
3081
3082 do_machine_check(&regs, 0);
3083#endif
3084}
3085
Avi Kivity851ba692009-08-24 11:10:17 +03003086static int handle_machine_check(struct kvm_vcpu *vcpu)
Andi Kleena0861c02009-06-08 17:37:09 +08003087{
3088 /* already handled by vcpu_run */
3089 return 1;
3090}
3091
Avi Kivity851ba692009-08-24 11:10:17 +03003092static int handle_exception(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003093{
Avi Kivity1155f762007-11-22 11:30:47 +02003094 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity851ba692009-08-24 11:10:17 +03003095 struct kvm_run *kvm_run = vcpu->run;
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003096 u32 intr_info, ex_no, error_code;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003097 unsigned long cr2, rip, dr6;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003098 u32 vect_info;
3099 enum emulation_result er;
3100
Avi Kivity1155f762007-11-22 11:30:47 +02003101 vect_info = vmx->idt_vectoring_info;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003102 intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
3103
Andi Kleena0861c02009-06-08 17:37:09 +08003104 if (is_machine_check(intr_info))
Avi Kivity851ba692009-08-24 11:10:17 +03003105 return handle_machine_check(vcpu);
Andi Kleena0861c02009-06-08 17:37:09 +08003106
Avi Kivity6aa8b732006-12-10 02:21:36 -08003107 if ((vect_info & VECTORING_INFO_VALID_MASK) &&
Avi Kivity65ac7262009-11-04 11:59:01 +02003108 !is_page_fault(intr_info)) {
3109 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
3110 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_SIMUL_EX;
3111 vcpu->run->internal.ndata = 2;
3112 vcpu->run->internal.data[0] = vect_info;
3113 vcpu->run->internal.data[1] = intr_info;
3114 return 0;
3115 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003116
Jan Kiszkae4a41882008-09-26 09:30:46 +02003117 if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR)
Avi Kivity1b6269d2007-10-09 12:12:19 +02003118 return 1; /* already handled by vmx_vcpu_run() */
Anthony Liguori2ab455c2007-04-27 09:29:49 +03003119
3120 if (is_no_device(intr_info)) {
Avi Kivity5fd86fc2007-05-02 20:40:00 +03003121 vmx_fpu_activate(vcpu);
Anthony Liguori2ab455c2007-04-27 09:29:49 +03003122 return 1;
3123 }
3124
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05003125 if (is_invalid_opcode(intr_info)) {
Andre Przywara51d8b662010-12-21 11:12:02 +01003126 er = emulate_instruction(vcpu, EMULTYPE_TRAP_UD);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05003127 if (er != EMULATE_DONE)
Avi Kivity7ee5d9402007-11-25 15:22:50 +02003128 kvm_queue_exception(vcpu, UD_VECTOR);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05003129 return 1;
3130 }
3131
Avi Kivity6aa8b732006-12-10 02:21:36 -08003132 error_code = 0;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003133 rip = kvm_rip_read(vcpu);
Ryan Harper2e113842008-02-11 10:26:38 -06003134 if (intr_info & INTR_INFO_DELIVER_CODE_MASK)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003135 error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
3136 if (is_page_fault(intr_info)) {
Sheng Yang14394422008-04-28 12:24:45 +08003137 /* EPT won't cause page fault directly */
Avi Kivity089d0342009-03-23 18:26:32 +02003138 if (enable_ept)
Sheng Yang14394422008-04-28 12:24:45 +08003139 BUG();
Avi Kivity6aa8b732006-12-10 02:21:36 -08003140 cr2 = vmcs_readl(EXIT_QUALIFICATION);
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003141 trace_kvm_page_fault(cr2, error_code);
3142
Gleb Natapov3298b752009-05-11 13:35:46 +03003143 if (kvm_event_needs_reinjection(vcpu))
Avi Kivity577bdc42008-07-19 08:57:05 +03003144 kvm_mmu_unprotect_page_virt(vcpu, cr2);
Andre Przywaradc25e892010-12-21 11:12:07 +01003145 return kvm_mmu_page_fault(vcpu, cr2, error_code, NULL, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003146 }
3147
Avi Kivity7ffd92c2009-06-09 14:10:45 +03003148 if (vmx->rmode.vm86_active &&
Avi Kivity6aa8b732006-12-10 02:21:36 -08003149 handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK,
Avi Kivity72d6e5a2007-06-05 16:15:51 +03003150 error_code)) {
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003151 if (vcpu->arch.halt_request) {
3152 vcpu->arch.halt_request = 0;
Avi Kivity72d6e5a2007-06-05 16:15:51 +03003153 return kvm_emulate_halt(vcpu);
3154 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003155 return 1;
Avi Kivity72d6e5a2007-06-05 16:15:51 +03003156 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003157
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003158 ex_no = intr_info & INTR_INFO_VECTOR_MASK;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003159 switch (ex_no) {
3160 case DB_VECTOR:
3161 dr6 = vmcs_readl(EXIT_QUALIFICATION);
3162 if (!(vcpu->guest_debug &
3163 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))) {
3164 vcpu->arch.dr6 = dr6 | DR6_FIXED_1;
3165 kvm_queue_exception(vcpu, DB_VECTOR);
3166 return 1;
3167 }
3168 kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1;
3169 kvm_run->debug.arch.dr7 = vmcs_readl(GUEST_DR7);
3170 /* fall through */
3171 case BP_VECTOR:
Jan Kiszkac573cd222010-02-23 17:47:53 +01003172 /*
3173 * Update instruction length as we may reinject #BP from
3174 * user space while in guest debugging mode. Reading it for
3175 * #DB as well causes no harm, it is not used in that case.
3176 */
3177 vmx->vcpu.arch.event_exit_inst_len =
3178 vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003179 kvm_run->exit_reason = KVM_EXIT_DEBUG;
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003180 kvm_run->debug.arch.pc = vmcs_readl(GUEST_CS_BASE) + rip;
3181 kvm_run->debug.arch.exception = ex_no;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003182 break;
3183 default:
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003184 kvm_run->exit_reason = KVM_EXIT_EXCEPTION;
3185 kvm_run->ex.exception = ex_no;
3186 kvm_run->ex.error_code = error_code;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003187 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003188 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003189 return 0;
3190}
3191
Avi Kivity851ba692009-08-24 11:10:17 +03003192static int handle_external_interrupt(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003193{
Avi Kivity1165f5f2007-04-19 17:27:43 +03003194 ++vcpu->stat.irq_exits;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003195 return 1;
3196}
3197
Avi Kivity851ba692009-08-24 11:10:17 +03003198static int handle_triple_fault(struct kvm_vcpu *vcpu)
Avi Kivity988ad742007-02-12 00:54:36 -08003199{
Avi Kivity851ba692009-08-24 11:10:17 +03003200 vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN;
Avi Kivity988ad742007-02-12 00:54:36 -08003201 return 0;
3202}
Avi Kivity6aa8b732006-12-10 02:21:36 -08003203
Avi Kivity851ba692009-08-24 11:10:17 +03003204static int handle_io(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003205{
He, Qingbfdaab02007-09-12 14:18:28 +08003206 unsigned long exit_qualification;
Jan Kiszka34c33d12009-02-08 13:28:15 +01003207 int size, in, string;
Avi Kivity039576c2007-03-20 12:46:50 +02003208 unsigned port;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003209
He, Qingbfdaab02007-09-12 14:18:28 +08003210 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Avi Kivity039576c2007-03-20 12:46:50 +02003211 string = (exit_qualification & 16) != 0;
Laurent Viviere70669a2007-08-05 10:36:40 +03003212 in = (exit_qualification & 8) != 0;
Laurent Viviere70669a2007-08-05 10:36:40 +03003213
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02003214 ++vcpu->stat.io_exits;
3215
3216 if (string || in)
Andre Przywara51d8b662010-12-21 11:12:02 +01003217 return emulate_instruction(vcpu, 0) == EMULATE_DONE;
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02003218
3219 port = exit_qualification >> 16;
3220 size = (exit_qualification & 7) + 1;
Guillaume Thouvenine93f36b2008-10-28 10:51:30 +01003221 skip_emulated_instruction(vcpu);
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02003222
3223 return kvm_fast_pio_out(vcpu, size, port);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003224}
3225
Ingo Molnar102d8322007-02-19 14:37:47 +02003226static void
3227vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
3228{
3229 /*
3230 * Patch in the VMCALL instruction:
3231 */
3232 hypercall[0] = 0x0f;
3233 hypercall[1] = 0x01;
3234 hypercall[2] = 0xc1;
Ingo Molnar102d8322007-02-19 14:37:47 +02003235}
3236
Avi Kivity851ba692009-08-24 11:10:17 +03003237static int handle_cr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003238{
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003239 unsigned long exit_qualification, val;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003240 int cr;
3241 int reg;
Avi Kivity49a9b072010-06-10 17:02:14 +03003242 int err;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003243
He, Qingbfdaab02007-09-12 14:18:28 +08003244 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003245 cr = exit_qualification & 15;
3246 reg = (exit_qualification >> 8) & 15;
3247 switch ((exit_qualification >> 4) & 3) {
3248 case 0: /* mov to cr */
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003249 val = kvm_register_read(vcpu, reg);
3250 trace_kvm_cr_write(cr, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003251 switch (cr) {
3252 case 0:
Avi Kivity49a9b072010-06-10 17:02:14 +03003253 err = kvm_set_cr0(vcpu, val);
Andre Przywaradb8fcef2010-12-21 11:12:01 +01003254 kvm_complete_insn_gp(vcpu, err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003255 return 1;
3256 case 3:
Avi Kivity23902182010-06-10 17:02:16 +03003257 err = kvm_set_cr3(vcpu, val);
Andre Przywaradb8fcef2010-12-21 11:12:01 +01003258 kvm_complete_insn_gp(vcpu, err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003259 return 1;
3260 case 4:
Avi Kivitya83b29c2010-06-10 17:02:15 +03003261 err = kvm_set_cr4(vcpu, val);
Andre Przywaradb8fcef2010-12-21 11:12:01 +01003262 kvm_complete_insn_gp(vcpu, err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003263 return 1;
Gleb Natapov0a5fff192009-04-21 17:45:06 +03003264 case 8: {
3265 u8 cr8_prev = kvm_get_cr8(vcpu);
3266 u8 cr8 = kvm_register_read(vcpu, reg);
Andre Przywaraeea1cff2010-12-21 11:12:00 +01003267 err = kvm_set_cr8(vcpu, cr8);
Andre Przywaradb8fcef2010-12-21 11:12:01 +01003268 kvm_complete_insn_gp(vcpu, err);
Gleb Natapov0a5fff192009-04-21 17:45:06 +03003269 if (irqchip_in_kernel(vcpu->kvm))
3270 return 1;
3271 if (cr8_prev <= cr8)
3272 return 1;
Avi Kivity851ba692009-08-24 11:10:17 +03003273 vcpu->run->exit_reason = KVM_EXIT_SET_TPR;
Gleb Natapov0a5fff192009-04-21 17:45:06 +03003274 return 0;
3275 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003276 };
3277 break;
Anthony Liguori25c4c272007-04-27 09:29:21 +03003278 case 2: /* clts */
Avi Kivityedcafe32009-12-30 18:07:40 +02003279 vmx_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS));
Avi Kivity4d4ec082009-12-29 18:07:30 +02003280 trace_kvm_cr_write(0, kvm_read_cr0(vcpu));
Anthony Liguori25c4c272007-04-27 09:29:21 +03003281 skip_emulated_instruction(vcpu);
Avi Kivity6b52d182010-01-21 15:31:47 +02003282 vmx_fpu_activate(vcpu);
Anthony Liguori25c4c272007-04-27 09:29:21 +03003283 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003284 case 1: /*mov from cr*/
3285 switch (cr) {
3286 case 3:
Avi Kivity9f8fe502010-12-05 17:30:00 +02003287 val = kvm_read_cr3(vcpu);
3288 kvm_register_write(vcpu, reg, val);
3289 trace_kvm_cr_read(cr, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003290 skip_emulated_instruction(vcpu);
3291 return 1;
3292 case 8:
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003293 val = kvm_get_cr8(vcpu);
3294 kvm_register_write(vcpu, reg, val);
3295 trace_kvm_cr_read(cr, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003296 skip_emulated_instruction(vcpu);
3297 return 1;
3298 }
3299 break;
3300 case 3: /* lmsw */
Avi Kivitya1f83a72009-12-29 17:33:58 +02003301 val = (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f;
Avi Kivity4d4ec082009-12-29 18:07:30 +02003302 trace_kvm_cr_write(0, (kvm_read_cr0(vcpu) & ~0xful) | val);
Avi Kivitya1f83a72009-12-29 17:33:58 +02003303 kvm_lmsw(vcpu, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003304
3305 skip_emulated_instruction(vcpu);
3306 return 1;
3307 default:
3308 break;
3309 }
Avi Kivity851ba692009-08-24 11:10:17 +03003310 vcpu->run->exit_reason = 0;
Rusty Russellf0242472007-08-01 10:48:02 +10003311 pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n",
Avi Kivity6aa8b732006-12-10 02:21:36 -08003312 (int)(exit_qualification >> 4) & 3, cr);
3313 return 0;
3314}
3315
Avi Kivity851ba692009-08-24 11:10:17 +03003316static int handle_dr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003317{
He, Qingbfdaab02007-09-12 14:18:28 +08003318 unsigned long exit_qualification;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003319 int dr, reg;
3320
Jan Kiszkaf2483412010-01-20 18:20:20 +01003321 /* Do not handle if the CPL > 0, will trigger GP on re-entry */
Avi Kivity0a79b002009-09-01 12:03:25 +03003322 if (!kvm_require_cpl(vcpu, 0))
3323 return 1;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003324 dr = vmcs_readl(GUEST_DR7);
3325 if (dr & DR7_GD) {
3326 /*
3327 * As the vm-exit takes precedence over the debug trap, we
3328 * need to emulate the latter, either for the host or the
3329 * guest debugging itself.
3330 */
3331 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) {
Avi Kivity851ba692009-08-24 11:10:17 +03003332 vcpu->run->debug.arch.dr6 = vcpu->arch.dr6;
3333 vcpu->run->debug.arch.dr7 = dr;
3334 vcpu->run->debug.arch.pc =
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003335 vmcs_readl(GUEST_CS_BASE) +
3336 vmcs_readl(GUEST_RIP);
Avi Kivity851ba692009-08-24 11:10:17 +03003337 vcpu->run->debug.arch.exception = DB_VECTOR;
3338 vcpu->run->exit_reason = KVM_EXIT_DEBUG;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003339 return 0;
3340 } else {
3341 vcpu->arch.dr7 &= ~DR7_GD;
3342 vcpu->arch.dr6 |= DR6_BD;
3343 vmcs_writel(GUEST_DR7, vcpu->arch.dr7);
3344 kvm_queue_exception(vcpu, DB_VECTOR);
3345 return 1;
3346 }
3347 }
3348
He, Qingbfdaab02007-09-12 14:18:28 +08003349 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003350 dr = exit_qualification & DEBUG_REG_ACCESS_NUM;
3351 reg = DEBUG_REG_ACCESS_REG(exit_qualification);
3352 if (exit_qualification & TYPE_MOV_FROM_DR) {
Gleb Natapov020df072010-04-13 10:05:23 +03003353 unsigned long val;
3354 if (!kvm_get_dr(vcpu, dr, &val))
3355 kvm_register_write(vcpu, reg, val);
3356 } else
3357 kvm_set_dr(vcpu, dr, vcpu->arch.regs[reg]);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003358 skip_emulated_instruction(vcpu);
3359 return 1;
3360}
3361
Gleb Natapov020df072010-04-13 10:05:23 +03003362static void vmx_set_dr7(struct kvm_vcpu *vcpu, unsigned long val)
3363{
3364 vmcs_writel(GUEST_DR7, val);
3365}
3366
Avi Kivity851ba692009-08-24 11:10:17 +03003367static int handle_cpuid(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003368{
Avi Kivity06465c52007-02-28 20:46:53 +02003369 kvm_emulate_cpuid(vcpu);
3370 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003371}
3372
Avi Kivity851ba692009-08-24 11:10:17 +03003373static int handle_rdmsr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003374{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003375 u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
Avi Kivity6aa8b732006-12-10 02:21:36 -08003376 u64 data;
3377
3378 if (vmx_get_msr(vcpu, ecx, &data)) {
Avi Kivity59200272010-01-25 19:47:02 +02003379 trace_kvm_msr_read_ex(ecx);
Avi Kivityc1a5d4f2007-11-25 14:12:03 +02003380 kvm_inject_gp(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003381 return 1;
3382 }
3383
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003384 trace_kvm_msr_read(ecx, data);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003385
Avi Kivity6aa8b732006-12-10 02:21:36 -08003386 /* FIXME: handling of bits 32:63 of rax, rdx */
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003387 vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u;
3388 vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003389 skip_emulated_instruction(vcpu);
3390 return 1;
3391}
3392
Avi Kivity851ba692009-08-24 11:10:17 +03003393static int handle_wrmsr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003394{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003395 u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
3396 u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u)
3397 | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003398
3399 if (vmx_set_msr(vcpu, ecx, data) != 0) {
Avi Kivity59200272010-01-25 19:47:02 +02003400 trace_kvm_msr_write_ex(ecx, data);
Avi Kivityc1a5d4f2007-11-25 14:12:03 +02003401 kvm_inject_gp(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003402 return 1;
3403 }
3404
Avi Kivity59200272010-01-25 19:47:02 +02003405 trace_kvm_msr_write(ecx, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003406 skip_emulated_instruction(vcpu);
3407 return 1;
3408}
3409
Avi Kivity851ba692009-08-24 11:10:17 +03003410static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu)
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003411{
Avi Kivity3842d132010-07-27 12:30:24 +03003412 kvm_make_request(KVM_REQ_EVENT, vcpu);
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003413 return 1;
3414}
3415
Avi Kivity851ba692009-08-24 11:10:17 +03003416static int handle_interrupt_window(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003417{
Eddie Dong85f455f2007-07-06 12:20:49 +03003418 u32 cpu_based_vm_exec_control;
3419
3420 /* clear pending irq */
3421 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
3422 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
3423 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003424
Avi Kivity3842d132010-07-27 12:30:24 +03003425 kvm_make_request(KVM_REQ_EVENT, vcpu);
3426
Jan Kiszkaa26bf122008-09-26 09:30:45 +02003427 ++vcpu->stat.irq_window_exits;
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003428
Dor Laorc1150d82007-01-05 16:36:24 -08003429 /*
3430 * If the user space waits to inject interrupts, exit as soon as
3431 * possible
3432 */
Gleb Natapov80618232009-04-21 17:44:56 +03003433 if (!irqchip_in_kernel(vcpu->kvm) &&
Avi Kivity851ba692009-08-24 11:10:17 +03003434 vcpu->run->request_interrupt_window &&
Gleb Natapov80618232009-04-21 17:44:56 +03003435 !kvm_cpu_has_interrupt(vcpu)) {
Avi Kivity851ba692009-08-24 11:10:17 +03003436 vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
Dor Laorc1150d82007-01-05 16:36:24 -08003437 return 0;
3438 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003439 return 1;
3440}
3441
Avi Kivity851ba692009-08-24 11:10:17 +03003442static int handle_halt(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003443{
3444 skip_emulated_instruction(vcpu);
Avi Kivityd3bef152007-06-05 15:53:05 +03003445 return kvm_emulate_halt(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003446}
3447
Avi Kivity851ba692009-08-24 11:10:17 +03003448static int handle_vmcall(struct kvm_vcpu *vcpu)
Ingo Molnarc21415e2007-02-19 14:37:47 +02003449{
Dor Laor510043d2007-02-19 18:25:43 +02003450 skip_emulated_instruction(vcpu);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05003451 kvm_emulate_hypercall(vcpu);
3452 return 1;
Ingo Molnarc21415e2007-02-19 14:37:47 +02003453}
3454
Avi Kivity851ba692009-08-24 11:10:17 +03003455static int handle_vmx_insn(struct kvm_vcpu *vcpu)
Avi Kivitye3c7cb62009-06-16 14:19:52 +03003456{
3457 kvm_queue_exception(vcpu, UD_VECTOR);
3458 return 1;
3459}
3460
Gleb Natapovec25d5e2010-11-01 15:35:01 +02003461static int handle_invd(struct kvm_vcpu *vcpu)
3462{
Andre Przywara51d8b662010-12-21 11:12:02 +01003463 return emulate_instruction(vcpu, 0) == EMULATE_DONE;
Gleb Natapovec25d5e2010-11-01 15:35:01 +02003464}
3465
Avi Kivity851ba692009-08-24 11:10:17 +03003466static int handle_invlpg(struct kvm_vcpu *vcpu)
Marcelo Tosattia7052892008-09-23 13:18:35 -03003467{
Sheng Yangf9c617f2009-03-25 10:08:52 +08003468 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Marcelo Tosattia7052892008-09-23 13:18:35 -03003469
3470 kvm_mmu_invlpg(vcpu, exit_qualification);
3471 skip_emulated_instruction(vcpu);
3472 return 1;
3473}
3474
Avi Kivity851ba692009-08-24 11:10:17 +03003475static int handle_wbinvd(struct kvm_vcpu *vcpu)
Eddie Donge5edaa02007-11-11 12:28:35 +02003476{
3477 skip_emulated_instruction(vcpu);
Sheng Yangf5f48ee2010-06-30 12:25:15 +08003478 kvm_emulate_wbinvd(vcpu);
Eddie Donge5edaa02007-11-11 12:28:35 +02003479 return 1;
3480}
3481
Dexuan Cui2acf9232010-06-10 11:27:12 +08003482static int handle_xsetbv(struct kvm_vcpu *vcpu)
3483{
3484 u64 new_bv = kvm_read_edx_eax(vcpu);
3485 u32 index = kvm_register_read(vcpu, VCPU_REGS_RCX);
3486
3487 if (kvm_set_xcr(vcpu, index, new_bv) == 0)
3488 skip_emulated_instruction(vcpu);
3489 return 1;
3490}
3491
Avi Kivity851ba692009-08-24 11:10:17 +03003492static int handle_apic_access(struct kvm_vcpu *vcpu)
Sheng Yangf78e0e22007-10-29 09:40:42 +08003493{
Andre Przywara51d8b662010-12-21 11:12:02 +01003494 return emulate_instruction(vcpu, 0) == EMULATE_DONE;
Sheng Yangf78e0e22007-10-29 09:40:42 +08003495}
3496
Avi Kivity851ba692009-08-24 11:10:17 +03003497static int handle_task_switch(struct kvm_vcpu *vcpu)
Izik Eidus37817f22008-03-24 23:14:53 +02003498{
Jan Kiszka60637aa2008-09-26 09:30:47 +02003499 struct vcpu_vmx *vmx = to_vmx(vcpu);
Izik Eidus37817f22008-03-24 23:14:53 +02003500 unsigned long exit_qualification;
Jan Kiszkae269fb22010-04-14 15:51:09 +02003501 bool has_error_code = false;
3502 u32 error_code = 0;
Izik Eidus37817f22008-03-24 23:14:53 +02003503 u16 tss_selector;
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003504 int reason, type, idt_v;
3505
3506 idt_v = (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK);
3507 type = (vmx->idt_vectoring_info & VECTORING_INFO_TYPE_MASK);
Izik Eidus37817f22008-03-24 23:14:53 +02003508
3509 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
3510
3511 reason = (u32)exit_qualification >> 30;
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003512 if (reason == TASK_SWITCH_GATE && idt_v) {
3513 switch (type) {
3514 case INTR_TYPE_NMI_INTR:
3515 vcpu->arch.nmi_injected = false;
3516 if (cpu_has_virtual_nmis())
3517 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
3518 GUEST_INTR_STATE_NMI);
3519 break;
3520 case INTR_TYPE_EXT_INTR:
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003521 case INTR_TYPE_SOFT_INTR:
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003522 kvm_clear_interrupt_queue(vcpu);
3523 break;
3524 case INTR_TYPE_HARD_EXCEPTION:
Jan Kiszkae269fb22010-04-14 15:51:09 +02003525 if (vmx->idt_vectoring_info &
3526 VECTORING_INFO_DELIVER_CODE_MASK) {
3527 has_error_code = true;
3528 error_code =
3529 vmcs_read32(IDT_VECTORING_ERROR_CODE);
3530 }
3531 /* fall through */
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003532 case INTR_TYPE_SOFT_EXCEPTION:
3533 kvm_clear_exception_queue(vcpu);
3534 break;
3535 default:
3536 break;
3537 }
Jan Kiszka60637aa2008-09-26 09:30:47 +02003538 }
Izik Eidus37817f22008-03-24 23:14:53 +02003539 tss_selector = exit_qualification;
3540
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003541 if (!idt_v || (type != INTR_TYPE_HARD_EXCEPTION &&
3542 type != INTR_TYPE_EXT_INTR &&
3543 type != INTR_TYPE_NMI_INTR))
3544 skip_emulated_instruction(vcpu);
3545
Gleb Natapovacb54512010-04-15 21:03:50 +03003546 if (kvm_task_switch(vcpu, tss_selector, reason,
3547 has_error_code, error_code) == EMULATE_FAIL) {
3548 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
3549 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
3550 vcpu->run->internal.ndata = 0;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003551 return 0;
Gleb Natapovacb54512010-04-15 21:03:50 +03003552 }
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003553
3554 /* clear all local breakpoint enable flags */
3555 vmcs_writel(GUEST_DR7, vmcs_readl(GUEST_DR7) & ~55);
3556
3557 /*
3558 * TODO: What about debug traps on tss switch?
3559 * Are we supposed to inject them and update dr6?
3560 */
3561
3562 return 1;
Izik Eidus37817f22008-03-24 23:14:53 +02003563}
3564
Avi Kivity851ba692009-08-24 11:10:17 +03003565static int handle_ept_violation(struct kvm_vcpu *vcpu)
Sheng Yang14394422008-04-28 12:24:45 +08003566{
Sheng Yangf9c617f2009-03-25 10:08:52 +08003567 unsigned long exit_qualification;
Sheng Yang14394422008-04-28 12:24:45 +08003568 gpa_t gpa;
Sheng Yang14394422008-04-28 12:24:45 +08003569 int gla_validity;
Sheng Yang14394422008-04-28 12:24:45 +08003570
Sheng Yangf9c617f2009-03-25 10:08:52 +08003571 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Sheng Yang14394422008-04-28 12:24:45 +08003572
3573 if (exit_qualification & (1 << 6)) {
3574 printk(KERN_ERR "EPT: GPA exceeds GAW!\n");
Jan Kiszka7f582ab2009-07-22 23:53:01 +02003575 return -EINVAL;
Sheng Yang14394422008-04-28 12:24:45 +08003576 }
3577
3578 gla_validity = (exit_qualification >> 7) & 0x3;
3579 if (gla_validity != 0x3 && gla_validity != 0x1 && gla_validity != 0) {
3580 printk(KERN_ERR "EPT: Handling EPT violation failed!\n");
3581 printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n",
3582 (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS),
Sheng Yangf9c617f2009-03-25 10:08:52 +08003583 vmcs_readl(GUEST_LINEAR_ADDRESS));
Sheng Yang14394422008-04-28 12:24:45 +08003584 printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n",
3585 (long unsigned int)exit_qualification);
Avi Kivity851ba692009-08-24 11:10:17 +03003586 vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
3587 vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_VIOLATION;
Avi Kivity596ae892009-06-03 14:12:10 +03003588 return 0;
Sheng Yang14394422008-04-28 12:24:45 +08003589 }
3590
3591 gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003592 trace_kvm_page_fault(gpa, exit_qualification);
Andre Przywaradc25e892010-12-21 11:12:07 +01003593 return kvm_mmu_page_fault(vcpu, gpa, exit_qualification & 0x3, NULL, 0);
Sheng Yang14394422008-04-28 12:24:45 +08003594}
3595
Marcelo Tosatti68f89402009-06-11 12:07:43 -03003596static u64 ept_rsvd_mask(u64 spte, int level)
3597{
3598 int i;
3599 u64 mask = 0;
3600
3601 for (i = 51; i > boot_cpu_data.x86_phys_bits; i--)
3602 mask |= (1ULL << i);
3603
3604 if (level > 2)
3605 /* bits 7:3 reserved */
3606 mask |= 0xf8;
3607 else if (level == 2) {
3608 if (spte & (1ULL << 7))
3609 /* 2MB ref, bits 20:12 reserved */
3610 mask |= 0x1ff000;
3611 else
3612 /* bits 6:3 reserved */
3613 mask |= 0x78;
3614 }
3615
3616 return mask;
3617}
3618
3619static void ept_misconfig_inspect_spte(struct kvm_vcpu *vcpu, u64 spte,
3620 int level)
3621{
3622 printk(KERN_ERR "%s: spte 0x%llx level %d\n", __func__, spte, level);
3623
3624 /* 010b (write-only) */
3625 WARN_ON((spte & 0x7) == 0x2);
3626
3627 /* 110b (write/execute) */
3628 WARN_ON((spte & 0x7) == 0x6);
3629
3630 /* 100b (execute-only) and value not supported by logical processor */
3631 if (!cpu_has_vmx_ept_execute_only())
3632 WARN_ON((spte & 0x7) == 0x4);
3633
3634 /* not 000b */
3635 if ((spte & 0x7)) {
3636 u64 rsvd_bits = spte & ept_rsvd_mask(spte, level);
3637
3638 if (rsvd_bits != 0) {
3639 printk(KERN_ERR "%s: rsvd_bits = 0x%llx\n",
3640 __func__, rsvd_bits);
3641 WARN_ON(1);
3642 }
3643
3644 if (level == 1 || (level == 2 && (spte & (1ULL << 7)))) {
3645 u64 ept_mem_type = (spte & 0x38) >> 3;
3646
3647 if (ept_mem_type == 2 || ept_mem_type == 3 ||
3648 ept_mem_type == 7) {
3649 printk(KERN_ERR "%s: ept_mem_type=0x%llx\n",
3650 __func__, ept_mem_type);
3651 WARN_ON(1);
3652 }
3653 }
3654 }
3655}
3656
Avi Kivity851ba692009-08-24 11:10:17 +03003657static int handle_ept_misconfig(struct kvm_vcpu *vcpu)
Marcelo Tosatti68f89402009-06-11 12:07:43 -03003658{
3659 u64 sptes[4];
3660 int nr_sptes, i;
3661 gpa_t gpa;
3662
3663 gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
3664
3665 printk(KERN_ERR "EPT: Misconfiguration.\n");
3666 printk(KERN_ERR "EPT: GPA: 0x%llx\n", gpa);
3667
3668 nr_sptes = kvm_mmu_get_spte_hierarchy(vcpu, gpa, sptes);
3669
3670 for (i = PT64_ROOT_LEVEL; i > PT64_ROOT_LEVEL - nr_sptes; --i)
3671 ept_misconfig_inspect_spte(vcpu, sptes[i-1], i);
3672
Avi Kivity851ba692009-08-24 11:10:17 +03003673 vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
3674 vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_MISCONFIG;
Marcelo Tosatti68f89402009-06-11 12:07:43 -03003675
3676 return 0;
3677}
3678
Avi Kivity851ba692009-08-24 11:10:17 +03003679static int handle_nmi_window(struct kvm_vcpu *vcpu)
Sheng Yangf08864b2008-05-15 18:23:25 +08003680{
3681 u32 cpu_based_vm_exec_control;
3682
3683 /* clear pending NMI */
3684 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
3685 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING;
3686 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
3687 ++vcpu->stat.nmi_window_exits;
Avi Kivity3842d132010-07-27 12:30:24 +03003688 kvm_make_request(KVM_REQ_EVENT, vcpu);
Sheng Yangf08864b2008-05-15 18:23:25 +08003689
3690 return 1;
3691}
3692
Mohammed Gamal80ced182009-09-01 12:48:18 +02003693static int handle_invalid_guest_state(struct kvm_vcpu *vcpu)
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003694{
Avi Kivity8b3079a2009-01-05 12:10:54 +02003695 struct vcpu_vmx *vmx = to_vmx(vcpu);
3696 enum emulation_result err = EMULATE_DONE;
Mohammed Gamal80ced182009-09-01 12:48:18 +02003697 int ret = 1;
Avi Kivity49e9d552010-09-19 14:34:08 +02003698 u32 cpu_exec_ctrl;
3699 bool intr_window_requested;
3700
3701 cpu_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
3702 intr_window_requested = cpu_exec_ctrl & CPU_BASED_VIRTUAL_INTR_PENDING;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003703
3704 while (!guest_state_valid(vcpu)) {
Avi Kivity49e9d552010-09-19 14:34:08 +02003705 if (intr_window_requested
3706 && (kvm_get_rflags(&vmx->vcpu) & X86_EFLAGS_IF))
3707 return handle_interrupt_window(&vmx->vcpu);
3708
Andre Przywara51d8b662010-12-21 11:12:02 +01003709 err = emulate_instruction(vcpu, 0);
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003710
Mohammed Gamal80ced182009-09-01 12:48:18 +02003711 if (err == EMULATE_DO_MMIO) {
3712 ret = 0;
3713 goto out;
3714 }
Guillaume Thouvenin1d5a4d92008-10-29 09:39:42 +01003715
Gleb Natapov6d77dbf2010-05-10 11:16:56 +03003716 if (err != EMULATE_DONE)
3717 return 0;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003718
3719 if (signal_pending(current))
Mohammed Gamal80ced182009-09-01 12:48:18 +02003720 goto out;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003721 if (need_resched())
3722 schedule();
3723 }
3724
Mohammed Gamal80ced182009-09-01 12:48:18 +02003725 vmx->emulation_required = 0;
3726out:
3727 return ret;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003728}
3729
Avi Kivity6aa8b732006-12-10 02:21:36 -08003730/*
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08003731 * Indicate a busy-waiting vcpu in spinlock. We do not enable the PAUSE
3732 * exiting, so only get here on cpu with PAUSE-Loop-Exiting.
3733 */
Marcelo Tosatti9fb41ba2009-10-12 19:37:31 -03003734static int handle_pause(struct kvm_vcpu *vcpu)
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08003735{
3736 skip_emulated_instruction(vcpu);
3737 kvm_vcpu_on_spin(vcpu);
3738
3739 return 1;
3740}
3741
Sheng Yang59708672009-12-15 13:29:54 +08003742static int handle_invalid_op(struct kvm_vcpu *vcpu)
3743{
3744 kvm_queue_exception(vcpu, UD_VECTOR);
3745 return 1;
3746}
3747
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08003748/*
Avi Kivity6aa8b732006-12-10 02:21:36 -08003749 * The exit handlers return 1 if the exit was handled fully and guest execution
3750 * may resume. Otherwise they set the kvm_run parameter to indicate what needs
3751 * to be done to userspace and return 0.
3752 */
Avi Kivity851ba692009-08-24 11:10:17 +03003753static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = {
Avi Kivity6aa8b732006-12-10 02:21:36 -08003754 [EXIT_REASON_EXCEPTION_NMI] = handle_exception,
3755 [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt,
Avi Kivity988ad742007-02-12 00:54:36 -08003756 [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault,
Sheng Yangf08864b2008-05-15 18:23:25 +08003757 [EXIT_REASON_NMI_WINDOW] = handle_nmi_window,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003758 [EXIT_REASON_IO_INSTRUCTION] = handle_io,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003759 [EXIT_REASON_CR_ACCESS] = handle_cr,
3760 [EXIT_REASON_DR_ACCESS] = handle_dr,
3761 [EXIT_REASON_CPUID] = handle_cpuid,
3762 [EXIT_REASON_MSR_READ] = handle_rdmsr,
3763 [EXIT_REASON_MSR_WRITE] = handle_wrmsr,
3764 [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window,
3765 [EXIT_REASON_HLT] = handle_halt,
Gleb Natapovec25d5e2010-11-01 15:35:01 +02003766 [EXIT_REASON_INVD] = handle_invd,
Marcelo Tosattia7052892008-09-23 13:18:35 -03003767 [EXIT_REASON_INVLPG] = handle_invlpg,
Ingo Molnarc21415e2007-02-19 14:37:47 +02003768 [EXIT_REASON_VMCALL] = handle_vmcall,
Avi Kivitye3c7cb62009-06-16 14:19:52 +03003769 [EXIT_REASON_VMCLEAR] = handle_vmx_insn,
3770 [EXIT_REASON_VMLAUNCH] = handle_vmx_insn,
3771 [EXIT_REASON_VMPTRLD] = handle_vmx_insn,
3772 [EXIT_REASON_VMPTRST] = handle_vmx_insn,
3773 [EXIT_REASON_VMREAD] = handle_vmx_insn,
3774 [EXIT_REASON_VMRESUME] = handle_vmx_insn,
3775 [EXIT_REASON_VMWRITE] = handle_vmx_insn,
3776 [EXIT_REASON_VMOFF] = handle_vmx_insn,
3777 [EXIT_REASON_VMON] = handle_vmx_insn,
Sheng Yangf78e0e22007-10-29 09:40:42 +08003778 [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold,
3779 [EXIT_REASON_APIC_ACCESS] = handle_apic_access,
Eddie Donge5edaa02007-11-11 12:28:35 +02003780 [EXIT_REASON_WBINVD] = handle_wbinvd,
Dexuan Cui2acf9232010-06-10 11:27:12 +08003781 [EXIT_REASON_XSETBV] = handle_xsetbv,
Izik Eidus37817f22008-03-24 23:14:53 +02003782 [EXIT_REASON_TASK_SWITCH] = handle_task_switch,
Andi Kleena0861c02009-06-08 17:37:09 +08003783 [EXIT_REASON_MCE_DURING_VMENTRY] = handle_machine_check,
Marcelo Tosatti68f89402009-06-11 12:07:43 -03003784 [EXIT_REASON_EPT_VIOLATION] = handle_ept_violation,
3785 [EXIT_REASON_EPT_MISCONFIG] = handle_ept_misconfig,
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08003786 [EXIT_REASON_PAUSE_INSTRUCTION] = handle_pause,
Sheng Yang59708672009-12-15 13:29:54 +08003787 [EXIT_REASON_MWAIT_INSTRUCTION] = handle_invalid_op,
3788 [EXIT_REASON_MONITOR_INSTRUCTION] = handle_invalid_op,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003789};
3790
3791static const int kvm_vmx_max_exit_handlers =
Robert P. J. Day50a34852007-06-03 13:35:29 -04003792 ARRAY_SIZE(kvm_vmx_exit_handlers);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003793
Avi Kivity586f9602010-11-18 13:09:54 +02003794static void vmx_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2)
3795{
3796 *info1 = vmcs_readl(EXIT_QUALIFICATION);
3797 *info2 = vmcs_read32(VM_EXIT_INTR_INFO);
3798}
3799
Avi Kivity6aa8b732006-12-10 02:21:36 -08003800/*
3801 * The guest has exited. See if we can fix it or if we need userspace
3802 * assistance.
3803 */
Avi Kivity851ba692009-08-24 11:10:17 +03003804static int vmx_handle_exit(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003805{
Avi Kivity29bd8a72007-09-10 17:27:03 +03003806 struct vcpu_vmx *vmx = to_vmx(vcpu);
Andi Kleena0861c02009-06-08 17:37:09 +08003807 u32 exit_reason = vmx->exit_reason;
Avi Kivity1155f762007-11-22 11:30:47 +02003808 u32 vectoring_info = vmx->idt_vectoring_info;
Avi Kivity29bd8a72007-09-10 17:27:03 +03003809
Avi Kivityaa179112010-11-17 18:44:19 +02003810 trace_kvm_exit(exit_reason, vcpu, KVM_ISA_VMX);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003811
Mohammed Gamal80ced182009-09-01 12:48:18 +02003812 /* If guest state is invalid, start emulating */
3813 if (vmx->emulation_required && emulate_invalid_guest_state)
3814 return handle_invalid_guest_state(vcpu);
Guillaume Thouvenin1d5a4d92008-10-29 09:39:42 +01003815
Mohammed Gamal51207022010-05-31 22:40:54 +03003816 if (exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY) {
3817 vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY;
3818 vcpu->run->fail_entry.hardware_entry_failure_reason
3819 = exit_reason;
3820 return 0;
3821 }
3822
Avi Kivity29bd8a72007-09-10 17:27:03 +03003823 if (unlikely(vmx->fail)) {
Avi Kivity851ba692009-08-24 11:10:17 +03003824 vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY;
3825 vcpu->run->fail_entry.hardware_entry_failure_reason
Avi Kivity29bd8a72007-09-10 17:27:03 +03003826 = vmcs_read32(VM_INSTRUCTION_ERROR);
3827 return 0;
3828 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003829
Mike Dayd77c26f2007-10-08 09:02:08 -04003830 if ((vectoring_info & VECTORING_INFO_VALID_MASK) &&
Sheng Yang14394422008-04-28 12:24:45 +08003831 (exit_reason != EXIT_REASON_EXCEPTION_NMI &&
Jan Kiszka60637aa2008-09-26 09:30:47 +02003832 exit_reason != EXIT_REASON_EPT_VIOLATION &&
3833 exit_reason != EXIT_REASON_TASK_SWITCH))
3834 printk(KERN_WARNING "%s: unexpected, valid vectoring info "
3835 "(0x%x) and exit reason is 0x%x\n",
3836 __func__, vectoring_info, exit_reason);
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003837
3838 if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked)) {
Gleb Natapovc4282df2009-04-21 17:45:07 +03003839 if (vmx_interrupt_allowed(vcpu)) {
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003840 vmx->soft_vnmi_blocked = 0;
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003841 } else if (vmx->vnmi_blocked_time > 1000000000LL &&
Jan Kiszka45312202008-12-11 16:54:54 +01003842 vcpu->arch.nmi_pending) {
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003843 /*
3844 * This CPU don't support us in finding the end of an
3845 * NMI-blocked window if the guest runs with IRQs
3846 * disabled. So we pull the trigger after 1 s of
3847 * futile waiting, but inform the user about this.
3848 */
3849 printk(KERN_WARNING "%s: Breaking out of NMI-blocked "
3850 "state on VCPU %d after 1 s timeout\n",
3851 __func__, vcpu->vcpu_id);
3852 vmx->soft_vnmi_blocked = 0;
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003853 }
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003854 }
3855
Avi Kivity6aa8b732006-12-10 02:21:36 -08003856 if (exit_reason < kvm_vmx_max_exit_handlers
3857 && kvm_vmx_exit_handlers[exit_reason])
Avi Kivity851ba692009-08-24 11:10:17 +03003858 return kvm_vmx_exit_handlers[exit_reason](vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003859 else {
Avi Kivity851ba692009-08-24 11:10:17 +03003860 vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
3861 vcpu->run->hw.hardware_exit_reason = exit_reason;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003862 }
3863 return 0;
3864}
3865
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003866static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003867{
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003868 if (irr == -1 || tpr < irr) {
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003869 vmcs_write32(TPR_THRESHOLD, 0);
3870 return;
3871 }
3872
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003873 vmcs_write32(TPR_THRESHOLD, irr);
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003874}
3875
Avi Kivity51aa01d2010-07-20 14:31:20 +03003876static void vmx_complete_atomic_exit(struct vcpu_vmx *vmx)
Avi Kivitycf393f72008-07-01 16:20:21 +03003877{
Avi Kivity51aa01d2010-07-20 14:31:20 +03003878 u32 exit_intr_info = vmx->exit_intr_info;
Andi Kleena0861c02009-06-08 17:37:09 +08003879
3880 /* Handle machine checks before interrupts are enabled */
3881 if ((vmx->exit_reason == EXIT_REASON_MCE_DURING_VMENTRY)
3882 || (vmx->exit_reason == EXIT_REASON_EXCEPTION_NMI
3883 && is_machine_check(exit_intr_info)))
3884 kvm_machine_check();
3885
Gleb Natapov20f65982009-05-11 13:35:55 +03003886 /* We need to handle NMIs before interrupts are enabled */
3887 if ((exit_intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR &&
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08003888 (exit_intr_info & INTR_INFO_VALID_MASK)) {
3889 kvm_before_handle_nmi(&vmx->vcpu);
Gleb Natapov20f65982009-05-11 13:35:55 +03003890 asm("int $2");
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08003891 kvm_after_handle_nmi(&vmx->vcpu);
3892 }
Avi Kivity51aa01d2010-07-20 14:31:20 +03003893}
Gleb Natapov20f65982009-05-11 13:35:55 +03003894
Avi Kivity51aa01d2010-07-20 14:31:20 +03003895static void vmx_recover_nmi_blocking(struct vcpu_vmx *vmx)
3896{
3897 u32 exit_intr_info = vmx->exit_intr_info;
3898 bool unblock_nmi;
3899 u8 vector;
3900 bool idtv_info_valid;
3901
3902 idtv_info_valid = vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK;
Gleb Natapov20f65982009-05-11 13:35:55 +03003903
Avi Kivitycf393f72008-07-01 16:20:21 +03003904 if (cpu_has_virtual_nmis()) {
3905 unblock_nmi = (exit_intr_info & INTR_INFO_UNBLOCK_NMI) != 0;
3906 vector = exit_intr_info & INTR_INFO_VECTOR_MASK;
3907 /*
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03003908 * SDM 3: 27.7.1.2 (September 2008)
Avi Kivitycf393f72008-07-01 16:20:21 +03003909 * Re-set bit "block by NMI" before VM entry if vmexit caused by
3910 * a guest IRET fault.
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03003911 * SDM 3: 23.2.2 (September 2008)
3912 * Bit 12 is undefined in any of the following cases:
3913 * If the VM exit sets the valid bit in the IDT-vectoring
3914 * information field.
3915 * If the VM exit is due to a double fault.
Avi Kivitycf393f72008-07-01 16:20:21 +03003916 */
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03003917 if ((exit_intr_info & INTR_INFO_VALID_MASK) && unblock_nmi &&
3918 vector != DF_VECTOR && !idtv_info_valid)
Avi Kivitycf393f72008-07-01 16:20:21 +03003919 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
3920 GUEST_INTR_STATE_NMI);
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003921 } else if (unlikely(vmx->soft_vnmi_blocked))
3922 vmx->vnmi_blocked_time +=
3923 ktime_to_ns(ktime_sub(ktime_get(), vmx->entry_time));
Avi Kivity51aa01d2010-07-20 14:31:20 +03003924}
3925
Avi Kivity83422e12010-07-20 14:43:23 +03003926static void __vmx_complete_interrupts(struct vcpu_vmx *vmx,
3927 u32 idt_vectoring_info,
3928 int instr_len_field,
3929 int error_code_field)
Avi Kivity51aa01d2010-07-20 14:31:20 +03003930{
Avi Kivity51aa01d2010-07-20 14:31:20 +03003931 u8 vector;
3932 int type;
3933 bool idtv_info_valid;
3934
3935 idtv_info_valid = idt_vectoring_info & VECTORING_INFO_VALID_MASK;
Avi Kivity668f6122008-07-02 09:28:55 +03003936
Gleb Natapov37b96e92009-03-30 16:03:13 +03003937 vmx->vcpu.arch.nmi_injected = false;
3938 kvm_clear_exception_queue(&vmx->vcpu);
3939 kvm_clear_interrupt_queue(&vmx->vcpu);
3940
3941 if (!idtv_info_valid)
3942 return;
3943
Avi Kivity3842d132010-07-27 12:30:24 +03003944 kvm_make_request(KVM_REQ_EVENT, &vmx->vcpu);
3945
Avi Kivity668f6122008-07-02 09:28:55 +03003946 vector = idt_vectoring_info & VECTORING_INFO_VECTOR_MASK;
3947 type = idt_vectoring_info & VECTORING_INFO_TYPE_MASK;
Gleb Natapov37b96e92009-03-30 16:03:13 +03003948
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003949 switch (type) {
Gleb Natapov37b96e92009-03-30 16:03:13 +03003950 case INTR_TYPE_NMI_INTR:
3951 vmx->vcpu.arch.nmi_injected = true;
Avi Kivity668f6122008-07-02 09:28:55 +03003952 /*
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03003953 * SDM 3: 27.7.1.2 (September 2008)
Gleb Natapov37b96e92009-03-30 16:03:13 +03003954 * Clear bit "block by NMI" before VM entry if a NMI
3955 * delivery faulted.
Avi Kivity668f6122008-07-02 09:28:55 +03003956 */
Gleb Natapov37b96e92009-03-30 16:03:13 +03003957 vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO,
3958 GUEST_INTR_STATE_NMI);
3959 break;
Gleb Natapov37b96e92009-03-30 16:03:13 +03003960 case INTR_TYPE_SOFT_EXCEPTION:
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003961 vmx->vcpu.arch.event_exit_inst_len =
Avi Kivity83422e12010-07-20 14:43:23 +03003962 vmcs_read32(instr_len_field);
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003963 /* fall through */
3964 case INTR_TYPE_HARD_EXCEPTION:
Avi Kivity35920a32008-07-03 14:50:12 +03003965 if (idt_vectoring_info & VECTORING_INFO_DELIVER_CODE_MASK) {
Avi Kivity83422e12010-07-20 14:43:23 +03003966 u32 err = vmcs_read32(error_code_field);
Gleb Natapov37b96e92009-03-30 16:03:13 +03003967 kvm_queue_exception_e(&vmx->vcpu, vector, err);
Avi Kivity35920a32008-07-03 14:50:12 +03003968 } else
3969 kvm_queue_exception(&vmx->vcpu, vector);
Gleb Natapov37b96e92009-03-30 16:03:13 +03003970 break;
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003971 case INTR_TYPE_SOFT_INTR:
3972 vmx->vcpu.arch.event_exit_inst_len =
Avi Kivity83422e12010-07-20 14:43:23 +03003973 vmcs_read32(instr_len_field);
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003974 /* fall through */
Gleb Natapov37b96e92009-03-30 16:03:13 +03003975 case INTR_TYPE_EXT_INTR:
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003976 kvm_queue_interrupt(&vmx->vcpu, vector,
3977 type == INTR_TYPE_SOFT_INTR);
Gleb Natapov37b96e92009-03-30 16:03:13 +03003978 break;
3979 default:
3980 break;
Avi Kivityf7d92382008-07-03 16:14:28 +03003981 }
Avi Kivitycf393f72008-07-01 16:20:21 +03003982}
3983
Avi Kivity83422e12010-07-20 14:43:23 +03003984static void vmx_complete_interrupts(struct vcpu_vmx *vmx)
3985{
3986 __vmx_complete_interrupts(vmx, vmx->idt_vectoring_info,
3987 VM_EXIT_INSTRUCTION_LEN,
3988 IDT_VECTORING_ERROR_CODE);
3989}
3990
Avi Kivityb463a6f2010-07-20 15:06:17 +03003991static void vmx_cancel_injection(struct kvm_vcpu *vcpu)
3992{
3993 __vmx_complete_interrupts(to_vmx(vcpu),
3994 vmcs_read32(VM_ENTRY_INTR_INFO_FIELD),
3995 VM_ENTRY_INSTRUCTION_LEN,
3996 VM_ENTRY_EXCEPTION_ERROR_CODE);
3997
3998 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0);
3999}
4000
Avi Kivityc8019492008-07-14 14:44:59 +03004001#ifdef CONFIG_X86_64
4002#define R "r"
4003#define Q "q"
4004#else
4005#define R "e"
4006#define Q "l"
4007#endif
4008
Lai Jiangshana3b5ba42011-02-11 14:29:40 +08004009static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08004010{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004011 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity104f2262010-11-18 13:12:52 +02004012
4013 /* Record the guest's net vcpu time for enforced NMI injections. */
4014 if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked))
4015 vmx->entry_time = ktime_get();
4016
4017 /* Don't enter VMX if guest state is invalid, let the exit handler
4018 start emulation until we arrive back to a valid state */
4019 if (vmx->emulation_required && emulate_invalid_guest_state)
4020 return;
4021
4022 if (test_bit(VCPU_REGS_RSP, (unsigned long *)&vcpu->arch.regs_dirty))
4023 vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]);
4024 if (test_bit(VCPU_REGS_RIP, (unsigned long *)&vcpu->arch.regs_dirty))
4025 vmcs_writel(GUEST_RIP, vcpu->arch.regs[VCPU_REGS_RIP]);
4026
4027 /* When single-stepping over STI and MOV SS, we must clear the
4028 * corresponding interruptibility bits in the guest state. Otherwise
4029 * vmentry fails as it then expects bit 14 (BS) in pending debug
4030 * exceptions being set, but that's not correct for the guest debugging
4031 * case. */
4032 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
4033 vmx_set_interrupt_shadow(vcpu, 0);
4034
4035 asm(
Avi Kivity6aa8b732006-12-10 02:21:36 -08004036 /* Store host registers */
Avi Kivityc8019492008-07-14 14:44:59 +03004037 "push %%"R"dx; push %%"R"bp;"
Avi Kivity40712fa2011-01-06 18:09:12 +02004038 "push %%"R"cx \n\t" /* placeholder for guest rcx */
Avi Kivityc8019492008-07-14 14:44:59 +03004039 "push %%"R"cx \n\t"
Avi Kivity313dbd492008-07-17 18:04:30 +03004040 "cmp %%"R"sp, %c[host_rsp](%0) \n\t"
4041 "je 1f \n\t"
4042 "mov %%"R"sp, %c[host_rsp](%0) \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03004043 __ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t"
Avi Kivity313dbd492008-07-17 18:04:30 +03004044 "1: \n\t"
Avi Kivityd3edefc2009-06-16 12:33:56 +03004045 /* Reload cr2 if changed */
4046 "mov %c[cr2](%0), %%"R"ax \n\t"
4047 "mov %%cr2, %%"R"dx \n\t"
4048 "cmp %%"R"ax, %%"R"dx \n\t"
4049 "je 2f \n\t"
4050 "mov %%"R"ax, %%cr2 \n\t"
4051 "2: \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08004052 /* Check if vmlaunch of vmresume is needed */
Avi Kivitye08aa782007-11-15 18:06:18 +02004053 "cmpl $0, %c[launched](%0) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08004054 /* Load guest registers. Don't clobber flags. */
Avi Kivityc8019492008-07-14 14:44:59 +03004055 "mov %c[rax](%0), %%"R"ax \n\t"
4056 "mov %c[rbx](%0), %%"R"bx \n\t"
4057 "mov %c[rdx](%0), %%"R"dx \n\t"
4058 "mov %c[rsi](%0), %%"R"si \n\t"
4059 "mov %c[rdi](%0), %%"R"di \n\t"
4060 "mov %c[rbp](%0), %%"R"bp \n\t"
Avi Kivity05b3e0c2006-12-13 00:33:45 -08004061#ifdef CONFIG_X86_64
Avi Kivitye08aa782007-11-15 18:06:18 +02004062 "mov %c[r8](%0), %%r8 \n\t"
4063 "mov %c[r9](%0), %%r9 \n\t"
4064 "mov %c[r10](%0), %%r10 \n\t"
4065 "mov %c[r11](%0), %%r11 \n\t"
4066 "mov %c[r12](%0), %%r12 \n\t"
4067 "mov %c[r13](%0), %%r13 \n\t"
4068 "mov %c[r14](%0), %%r14 \n\t"
4069 "mov %c[r15](%0), %%r15 \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08004070#endif
Avi Kivityc8019492008-07-14 14:44:59 +03004071 "mov %c[rcx](%0), %%"R"cx \n\t" /* kills %0 (ecx) */
4072
Avi Kivity6aa8b732006-12-10 02:21:36 -08004073 /* Enter guest mode */
Avi Kivitycd2276a2007-05-14 20:41:13 +03004074 "jne .Llaunched \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03004075 __ex(ASM_VMX_VMLAUNCH) "\n\t"
Avi Kivitycd2276a2007-05-14 20:41:13 +03004076 "jmp .Lkvm_vmx_return \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03004077 ".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t"
Avi Kivitycd2276a2007-05-14 20:41:13 +03004078 ".Lkvm_vmx_return: "
Avi Kivity6aa8b732006-12-10 02:21:36 -08004079 /* Save guest registers, load host registers, keep flags */
Avi Kivity40712fa2011-01-06 18:09:12 +02004080 "mov %0, %c[wordsize](%%"R"sp) \n\t"
4081 "pop %0 \n\t"
Avi Kivityc8019492008-07-14 14:44:59 +03004082 "mov %%"R"ax, %c[rax](%0) \n\t"
4083 "mov %%"R"bx, %c[rbx](%0) \n\t"
Avi Kivity1c696d02011-01-06 18:09:11 +02004084 "pop"Q" %c[rcx](%0) \n\t"
Avi Kivityc8019492008-07-14 14:44:59 +03004085 "mov %%"R"dx, %c[rdx](%0) \n\t"
4086 "mov %%"R"si, %c[rsi](%0) \n\t"
4087 "mov %%"R"di, %c[rdi](%0) \n\t"
4088 "mov %%"R"bp, %c[rbp](%0) \n\t"
Avi Kivity05b3e0c2006-12-13 00:33:45 -08004089#ifdef CONFIG_X86_64
Avi Kivitye08aa782007-11-15 18:06:18 +02004090 "mov %%r8, %c[r8](%0) \n\t"
4091 "mov %%r9, %c[r9](%0) \n\t"
4092 "mov %%r10, %c[r10](%0) \n\t"
4093 "mov %%r11, %c[r11](%0) \n\t"
4094 "mov %%r12, %c[r12](%0) \n\t"
4095 "mov %%r13, %c[r13](%0) \n\t"
4096 "mov %%r14, %c[r14](%0) \n\t"
4097 "mov %%r15, %c[r15](%0) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08004098#endif
Avi Kivityc8019492008-07-14 14:44:59 +03004099 "mov %%cr2, %%"R"ax \n\t"
4100 "mov %%"R"ax, %c[cr2](%0) \n\t"
4101
Avi Kivity1c696d02011-01-06 18:09:11 +02004102 "pop %%"R"bp; pop %%"R"dx \n\t"
Avi Kivitye08aa782007-11-15 18:06:18 +02004103 "setbe %c[fail](%0) \n\t"
4104 : : "c"(vmx), "d"((unsigned long)HOST_RSP),
4105 [launched]"i"(offsetof(struct vcpu_vmx, launched)),
4106 [fail]"i"(offsetof(struct vcpu_vmx, fail)),
Avi Kivity313dbd492008-07-17 18:04:30 +03004107 [host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)),
Zhang Xiantaoad312c72007-12-13 23:50:52 +08004108 [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])),
4109 [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])),
4110 [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])),
4111 [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])),
4112 [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])),
4113 [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])),
4114 [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])),
Avi Kivity05b3e0c2006-12-13 00:33:45 -08004115#ifdef CONFIG_X86_64
Zhang Xiantaoad312c72007-12-13 23:50:52 +08004116 [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])),
4117 [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])),
4118 [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])),
4119 [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])),
4120 [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])),
4121 [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])),
4122 [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])),
4123 [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])),
Avi Kivity6aa8b732006-12-10 02:21:36 -08004124#endif
Avi Kivity40712fa2011-01-06 18:09:12 +02004125 [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2)),
4126 [wordsize]"i"(sizeof(ulong))
Laurent Vivierc2036302007-10-25 14:18:52 +02004127 : "cc", "memory"
Jan Kiszka07d6f552010-09-28 16:37:42 +02004128 , R"ax", R"bx", R"di", R"si"
Laurent Vivierc2036302007-10-25 14:18:52 +02004129#ifdef CONFIG_X86_64
Laurent Vivierc2036302007-10-25 14:18:52 +02004130 , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
4131#endif
4132 );
Avi Kivity6aa8b732006-12-10 02:21:36 -08004133
Avi Kivity6de4f3a2009-05-31 22:58:47 +03004134 vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP)
Avi Kivity6de12732011-03-07 12:51:22 +02004135 | (1 << VCPU_EXREG_RFLAGS)
Avi Kivityaff48ba2010-12-05 18:56:11 +02004136 | (1 << VCPU_EXREG_PDPTR)
4137 | (1 << VCPU_EXREG_CR3));
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03004138 vcpu->arch.regs_dirty = 0;
4139
Avi Kivity1155f762007-11-22 11:30:47 +02004140 vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD);
4141
Mike Dayd77c26f2007-10-08 09:02:08 -04004142 asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS));
Avi Kivity15ad7142007-07-11 18:17:21 +03004143 vmx->launched = 1;
Avi Kivity1b6269d2007-10-09 12:12:19 +02004144
Avi Kivity51aa01d2010-07-20 14:31:20 +03004145 vmx->exit_reason = vmcs_read32(VM_EXIT_REASON);
4146 vmx->exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
4147
4148 vmx_complete_atomic_exit(vmx);
4149 vmx_recover_nmi_blocking(vmx);
Avi Kivitycf393f72008-07-01 16:20:21 +03004150 vmx_complete_interrupts(vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004151}
4152
Avi Kivityc8019492008-07-14 14:44:59 +03004153#undef R
4154#undef Q
4155
Avi Kivity6aa8b732006-12-10 02:21:36 -08004156static void vmx_free_vmcs(struct kvm_vcpu *vcpu)
4157{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004158 struct vcpu_vmx *vmx = to_vmx(vcpu);
4159
4160 if (vmx->vmcs) {
Avi Kivity543e4242008-05-13 16:22:47 +03004161 vcpu_clear(vmx);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004162 free_vmcs(vmx->vmcs);
4163 vmx->vmcs = NULL;
Avi Kivity6aa8b732006-12-10 02:21:36 -08004164 }
4165}
4166
4167static void vmx_free_vcpu(struct kvm_vcpu *vcpu)
4168{
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004169 struct vcpu_vmx *vmx = to_vmx(vcpu);
4170
Lai Jiangshancdbecfc2010-04-17 16:41:47 +08004171 free_vpid(vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004172 vmx_free_vmcs(vcpu);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004173 kfree(vmx->guest_msrs);
4174 kvm_vcpu_uninit(vcpu);
Rusty Russella4770342007-08-01 14:46:11 +10004175 kmem_cache_free(kvm_vcpu_cache, vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004176}
4177
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08004178static inline void vmcs_init(struct vmcs *vmcs)
4179{
4180 u64 phys_addr = __pa(per_cpu(vmxarea, raw_smp_processor_id()));
4181
4182 if (!vmm_exclusive)
4183 kvm_cpu_vmxon(phys_addr);
4184
4185 vmcs_clear(vmcs);
4186
4187 if (!vmm_exclusive)
4188 kvm_cpu_vmxoff();
4189}
4190
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004191static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
Avi Kivity6aa8b732006-12-10 02:21:36 -08004192{
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004193 int err;
Rusty Russellc16f8622007-07-30 21:12:19 +10004194 struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
Avi Kivity15ad7142007-07-11 18:17:21 +03004195 int cpu;
Avi Kivity6aa8b732006-12-10 02:21:36 -08004196
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004197 if (!vmx)
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004198 return ERR_PTR(-ENOMEM);
4199
Sheng Yang2384d2b2008-01-17 15:14:33 +08004200 allocate_vpid(vmx);
4201
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004202 err = kvm_vcpu_init(&vmx->vcpu, kvm, id);
4203 if (err)
4204 goto free_vcpu;
Ingo Molnar965b58a2007-01-05 16:36:23 -08004205
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004206 vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004207 if (!vmx->guest_msrs) {
4208 err = -ENOMEM;
4209 goto uninit_vcpu;
4210 }
Ingo Molnar965b58a2007-01-05 16:36:23 -08004211
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004212 vmx->vmcs = alloc_vmcs();
4213 if (!vmx->vmcs)
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004214 goto free_msrs;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004215
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08004216 vmcs_init(vmx->vmcs);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004217
Avi Kivity15ad7142007-07-11 18:17:21 +03004218 cpu = get_cpu();
4219 vmx_vcpu_load(&vmx->vcpu, cpu);
Zachary Amsdene48672f2010-08-19 22:07:23 -10004220 vmx->vcpu.cpu = cpu;
Rusty Russell8b9cf982007-07-30 16:31:43 +10004221 err = vmx_vcpu_setup(vmx);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004222 vmx_vcpu_put(&vmx->vcpu);
Avi Kivity15ad7142007-07-11 18:17:21 +03004223 put_cpu();
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004224 if (err)
4225 goto free_vmcs;
Marcelo Tosatti5e4a0b32008-02-14 21:21:43 -02004226 if (vm_need_virtualize_apic_accesses(kvm))
4227 if (alloc_apic_access_page(kvm) != 0)
4228 goto free_vmcs;
Ingo Molnar965b58a2007-01-05 16:36:23 -08004229
Sheng Yangb927a3c2009-07-21 10:42:48 +08004230 if (enable_ept) {
4231 if (!kvm->arch.ept_identity_map_addr)
4232 kvm->arch.ept_identity_map_addr =
4233 VMX_EPT_IDENTITY_PAGETABLE_ADDR;
Gleb Natapov93ea5382011-02-21 12:07:59 +02004234 err = -ENOMEM;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08004235 if (alloc_identity_pagetable(kvm) != 0)
4236 goto free_vmcs;
Gleb Natapov93ea5382011-02-21 12:07:59 +02004237 if (!init_rmode_identity_map(kvm))
4238 goto free_vmcs;
Sheng Yangb927a3c2009-07-21 10:42:48 +08004239 }
Sheng Yangb7ebfb02008-04-25 21:44:52 +08004240
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004241 return &vmx->vcpu;
Ingo Molnar965b58a2007-01-05 16:36:23 -08004242
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004243free_vmcs:
4244 free_vmcs(vmx->vmcs);
4245free_msrs:
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004246 kfree(vmx->guest_msrs);
4247uninit_vcpu:
4248 kvm_vcpu_uninit(&vmx->vcpu);
4249free_vcpu:
Lai Jiangshancdbecfc2010-04-17 16:41:47 +08004250 free_vpid(vmx);
Rusty Russella4770342007-08-01 14:46:11 +10004251 kmem_cache_free(kvm_vcpu_cache, vmx);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004252 return ERR_PTR(err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004253}
4254
Yang, Sheng002c7f72007-07-31 14:23:01 +03004255static void __init vmx_check_processor_compat(void *rtn)
4256{
4257 struct vmcs_config vmcs_conf;
4258
4259 *(int *)rtn = 0;
4260 if (setup_vmcs_config(&vmcs_conf) < 0)
4261 *(int *)rtn = -EIO;
4262 if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) {
4263 printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n",
4264 smp_processor_id());
4265 *(int *)rtn = -EIO;
4266 }
4267}
4268
Sheng Yang67253af2008-04-25 10:20:22 +08004269static int get_ept_level(void)
4270{
4271 return VMX_EPT_DEFAULT_GAW + 1;
4272}
4273
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004274static u64 vmx_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
Sheng Yang64d4d522008-10-09 16:01:57 +08004275{
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004276 u64 ret;
4277
Sheng Yang522c68c2009-04-27 20:35:43 +08004278 /* For VT-d and EPT combination
4279 * 1. MMIO: always map as UC
4280 * 2. EPT with VT-d:
4281 * a. VT-d without snooping control feature: can't guarantee the
4282 * result, try to trust guest.
4283 * b. VT-d with snooping control feature: snooping control feature of
4284 * VT-d engine can guarantee the cache correctness. Just set it
4285 * to WB to keep consistent with host. So the same as item 3.
Sheng Yanga19a6d12010-02-09 16:41:53 +08004286 * 3. EPT without VT-d: always map as WB and set IPAT=1 to keep
Sheng Yang522c68c2009-04-27 20:35:43 +08004287 * consistent with host MTRR
4288 */
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004289 if (is_mmio)
4290 ret = MTRR_TYPE_UNCACHABLE << VMX_EPT_MT_EPTE_SHIFT;
Sheng Yang522c68c2009-04-27 20:35:43 +08004291 else if (vcpu->kvm->arch.iommu_domain &&
4292 !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY))
4293 ret = kvm_get_guest_memory_type(vcpu, gfn) <<
4294 VMX_EPT_MT_EPTE_SHIFT;
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004295 else
Sheng Yang522c68c2009-04-27 20:35:43 +08004296 ret = (MTRR_TYPE_WRBACK << VMX_EPT_MT_EPTE_SHIFT)
Sheng Yanga19a6d12010-02-09 16:41:53 +08004297 | VMX_EPT_IPAT_BIT;
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004298
4299 return ret;
Sheng Yang64d4d522008-10-09 16:01:57 +08004300}
4301
Avi Kivityf4c9e872009-12-28 16:06:35 +02004302#define _ER(x) { EXIT_REASON_##x, #x }
4303
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004304static const struct trace_print_flags vmx_exit_reasons_str[] = {
Avi Kivityf4c9e872009-12-28 16:06:35 +02004305 _ER(EXCEPTION_NMI),
4306 _ER(EXTERNAL_INTERRUPT),
4307 _ER(TRIPLE_FAULT),
4308 _ER(PENDING_INTERRUPT),
4309 _ER(NMI_WINDOW),
4310 _ER(TASK_SWITCH),
4311 _ER(CPUID),
4312 _ER(HLT),
4313 _ER(INVLPG),
4314 _ER(RDPMC),
4315 _ER(RDTSC),
4316 _ER(VMCALL),
4317 _ER(VMCLEAR),
4318 _ER(VMLAUNCH),
4319 _ER(VMPTRLD),
4320 _ER(VMPTRST),
4321 _ER(VMREAD),
4322 _ER(VMRESUME),
4323 _ER(VMWRITE),
4324 _ER(VMOFF),
4325 _ER(VMON),
4326 _ER(CR_ACCESS),
4327 _ER(DR_ACCESS),
4328 _ER(IO_INSTRUCTION),
4329 _ER(MSR_READ),
4330 _ER(MSR_WRITE),
4331 _ER(MWAIT_INSTRUCTION),
4332 _ER(MONITOR_INSTRUCTION),
4333 _ER(PAUSE_INSTRUCTION),
4334 _ER(MCE_DURING_VMENTRY),
4335 _ER(TPR_BELOW_THRESHOLD),
4336 _ER(APIC_ACCESS),
4337 _ER(EPT_VIOLATION),
4338 _ER(EPT_MISCONFIG),
4339 _ER(WBINVD),
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004340 { -1, NULL }
4341};
4342
Avi Kivityf4c9e872009-12-28 16:06:35 +02004343#undef _ER
4344
Sheng Yang17cc3932010-01-05 19:02:27 +08004345static int vmx_get_lpage_level(void)
Joerg Roedel344f4142009-07-27 16:30:48 +02004346{
Sheng Yang878403b2010-01-05 19:02:29 +08004347 if (enable_ept && !cpu_has_vmx_ept_1g_page())
4348 return PT_DIRECTORY_LEVEL;
4349 else
4350 /* For shadow and EPT supported 1GB page */
4351 return PT_PDPE_LEVEL;
Joerg Roedel344f4142009-07-27 16:30:48 +02004352}
4353
Sheng Yang0e851882009-12-18 16:48:46 +08004354static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
4355{
Sheng Yang4e47c7a2009-12-18 16:48:47 +08004356 struct kvm_cpuid_entry2 *best;
4357 struct vcpu_vmx *vmx = to_vmx(vcpu);
4358 u32 exec_control;
4359
4360 vmx->rdtscp_enabled = false;
4361 if (vmx_rdtscp_supported()) {
4362 exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
4363 if (exec_control & SECONDARY_EXEC_RDTSCP) {
4364 best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
4365 if (best && (best->edx & bit(X86_FEATURE_RDTSCP)))
4366 vmx->rdtscp_enabled = true;
4367 else {
4368 exec_control &= ~SECONDARY_EXEC_RDTSCP;
4369 vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
4370 exec_control);
4371 }
4372 }
4373 }
Sheng Yang0e851882009-12-18 16:48:46 +08004374}
4375
Joerg Roedeld4330ef2010-04-22 12:33:11 +02004376static void vmx_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
4377{
4378}
4379
Christian Ehrhardtcbdd1be2007-09-09 15:41:59 +03004380static struct kvm_x86_ops vmx_x86_ops = {
Avi Kivity6aa8b732006-12-10 02:21:36 -08004381 .cpu_has_kvm_support = cpu_has_kvm_support,
4382 .disabled_by_bios = vmx_disabled_by_bios,
4383 .hardware_setup = hardware_setup,
4384 .hardware_unsetup = hardware_unsetup,
Yang, Sheng002c7f72007-07-31 14:23:01 +03004385 .check_processor_compatibility = vmx_check_processor_compat,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004386 .hardware_enable = hardware_enable,
4387 .hardware_disable = hardware_disable,
Sheng Yang04547152009-04-01 15:52:31 +08004388 .cpu_has_accelerated_tpr = report_flexpriority,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004389
4390 .vcpu_create = vmx_create_vcpu,
4391 .vcpu_free = vmx_free_vcpu,
Avi Kivity04d2cc72007-09-10 18:10:54 +03004392 .vcpu_reset = vmx_vcpu_reset,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004393
Avi Kivity04d2cc72007-09-10 18:10:54 +03004394 .prepare_guest_switch = vmx_save_host_state,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004395 .vcpu_load = vmx_vcpu_load,
4396 .vcpu_put = vmx_vcpu_put,
4397
4398 .set_guest_debug = set_guest_debug,
4399 .get_msr = vmx_get_msr,
4400 .set_msr = vmx_set_msr,
4401 .get_segment_base = vmx_get_segment_base,
4402 .get_segment = vmx_get_segment,
4403 .set_segment = vmx_set_segment,
Izik Eidus2e4d2652008-03-24 19:38:34 +02004404 .get_cpl = vmx_get_cpl,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004405 .get_cs_db_l_bits = vmx_get_cs_db_l_bits,
Avi Kivitye8467fd2009-12-29 18:43:06 +02004406 .decache_cr0_guest_bits = vmx_decache_cr0_guest_bits,
Avi Kivityaff48ba2010-12-05 18:56:11 +02004407 .decache_cr3 = vmx_decache_cr3,
Anthony Liguori25c4c272007-04-27 09:29:21 +03004408 .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004409 .set_cr0 = vmx_set_cr0,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004410 .set_cr3 = vmx_set_cr3,
4411 .set_cr4 = vmx_set_cr4,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004412 .set_efer = vmx_set_efer,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004413 .get_idt = vmx_get_idt,
4414 .set_idt = vmx_set_idt,
4415 .get_gdt = vmx_get_gdt,
4416 .set_gdt = vmx_set_gdt,
Gleb Natapov020df072010-04-13 10:05:23 +03004417 .set_dr7 = vmx_set_dr7,
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03004418 .cache_reg = vmx_cache_reg,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004419 .get_rflags = vmx_get_rflags,
4420 .set_rflags = vmx_set_rflags,
Avi Kivityebcbab42010-02-07 11:56:52 +02004421 .fpu_activate = vmx_fpu_activate,
Avi Kivity02daab22009-12-30 12:40:26 +02004422 .fpu_deactivate = vmx_fpu_deactivate,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004423
4424 .tlb_flush = vmx_flush_tlb,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004425
Avi Kivity6aa8b732006-12-10 02:21:36 -08004426 .run = vmx_vcpu_run,
Avi Kivity6062d012009-03-23 17:35:17 +02004427 .handle_exit = vmx_handle_exit,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004428 .skip_emulated_instruction = skip_emulated_instruction,
Glauber Costa2809f5d2009-05-12 16:21:05 -04004429 .set_interrupt_shadow = vmx_set_interrupt_shadow,
4430 .get_interrupt_shadow = vmx_get_interrupt_shadow,
Ingo Molnar102d8322007-02-19 14:37:47 +02004431 .patch_hypercall = vmx_patch_hypercall,
Eddie Dong2a8067f2007-08-06 16:29:07 +03004432 .set_irq = vmx_inject_irq,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004433 .set_nmi = vmx_inject_nmi,
Avi Kivity298101d2007-11-25 13:41:11 +02004434 .queue_exception = vmx_queue_exception,
Avi Kivityb463a6f2010-07-20 15:06:17 +03004435 .cancel_injection = vmx_cancel_injection,
Gleb Natapov78646122009-03-23 12:12:11 +02004436 .interrupt_allowed = vmx_interrupt_allowed,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004437 .nmi_allowed = vmx_nmi_allowed,
Jan Kiszka3cfc3092009-11-12 01:04:25 +01004438 .get_nmi_mask = vmx_get_nmi_mask,
4439 .set_nmi_mask = vmx_set_nmi_mask,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004440 .enable_nmi_window = enable_nmi_window,
4441 .enable_irq_window = enable_irq_window,
4442 .update_cr8_intercept = update_cr8_intercept,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004443
Izik Eiduscbc94022007-10-25 00:29:55 +02004444 .set_tss_addr = vmx_set_tss_addr,
Sheng Yang67253af2008-04-25 10:20:22 +08004445 .get_tdp_level = get_ept_level,
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004446 .get_mt_mask = vmx_get_mt_mask,
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004447
Avi Kivity586f9602010-11-18 13:09:54 +02004448 .get_exit_info = vmx_get_exit_info,
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004449 .exit_reasons_str = vmx_exit_reasons_str,
Avi Kivity586f9602010-11-18 13:09:54 +02004450
Sheng Yang17cc3932010-01-05 19:02:27 +08004451 .get_lpage_level = vmx_get_lpage_level,
Sheng Yang0e851882009-12-18 16:48:46 +08004452
4453 .cpuid_update = vmx_cpuid_update,
Sheng Yang4e47c7a2009-12-18 16:48:47 +08004454
4455 .rdtscp_supported = vmx_rdtscp_supported,
Joerg Roedeld4330ef2010-04-22 12:33:11 +02004456
4457 .set_supported_cpuid = vmx_set_supported_cpuid,
Sheng Yangf5f48ee2010-06-30 12:25:15 +08004458
4459 .has_wbinvd_exit = cpu_has_vmx_wbinvd_exit,
Zachary Amsden99e3e302010-08-19 22:07:17 -10004460
4461 .write_tsc_offset = vmx_write_tsc_offset,
Zachary Amsdene48672f2010-08-19 22:07:23 -10004462 .adjust_tsc_offset = vmx_adjust_tsc_offset,
Joerg Roedel1c97f0a2010-09-10 17:30:41 +02004463
4464 .set_tdp_cr3 = vmx_set_cr3,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004465};
4466
4467static int __init vmx_init(void)
4468{
Avi Kivity26bb0982009-09-07 11:14:12 +03004469 int r, i;
4470
4471 rdmsrl_safe(MSR_EFER, &host_efer);
4472
4473 for (i = 0; i < NR_VMX_MSR; ++i)
4474 kvm_define_shared_msr(i, vmx_msr_index[i]);
He, Qingfdef3ad2007-04-30 09:45:24 +03004475
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004476 vmx_io_bitmap_a = (unsigned long *)__get_free_page(GFP_KERNEL);
He, Qingfdef3ad2007-04-30 09:45:24 +03004477 if (!vmx_io_bitmap_a)
4478 return -ENOMEM;
4479
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004480 vmx_io_bitmap_b = (unsigned long *)__get_free_page(GFP_KERNEL);
He, Qingfdef3ad2007-04-30 09:45:24 +03004481 if (!vmx_io_bitmap_b) {
4482 r = -ENOMEM;
4483 goto out;
4484 }
4485
Avi Kivity58972972009-02-24 22:26:47 +02004486 vmx_msr_bitmap_legacy = (unsigned long *)__get_free_page(GFP_KERNEL);
4487 if (!vmx_msr_bitmap_legacy) {
Sheng Yang25c5f222008-03-28 13:18:56 +08004488 r = -ENOMEM;
4489 goto out1;
4490 }
4491
Avi Kivity58972972009-02-24 22:26:47 +02004492 vmx_msr_bitmap_longmode = (unsigned long *)__get_free_page(GFP_KERNEL);
4493 if (!vmx_msr_bitmap_longmode) {
4494 r = -ENOMEM;
4495 goto out2;
4496 }
4497
He, Qingfdef3ad2007-04-30 09:45:24 +03004498 /*
4499 * Allow direct access to the PC debug port (it is often used for I/O
4500 * delays, but the vmexits simply slow things down).
4501 */
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004502 memset(vmx_io_bitmap_a, 0xff, PAGE_SIZE);
4503 clear_bit(0x80, vmx_io_bitmap_a);
He, Qingfdef3ad2007-04-30 09:45:24 +03004504
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004505 memset(vmx_io_bitmap_b, 0xff, PAGE_SIZE);
He, Qingfdef3ad2007-04-30 09:45:24 +03004506
Avi Kivity58972972009-02-24 22:26:47 +02004507 memset(vmx_msr_bitmap_legacy, 0xff, PAGE_SIZE);
4508 memset(vmx_msr_bitmap_longmode, 0xff, PAGE_SIZE);
Sheng Yang25c5f222008-03-28 13:18:56 +08004509
Sheng Yang2384d2b2008-01-17 15:14:33 +08004510 set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */
4511
Avi Kivity0ee75be2010-04-28 15:39:01 +03004512 r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx),
4513 __alignof__(struct vcpu_vmx), THIS_MODULE);
He, Qingfdef3ad2007-04-30 09:45:24 +03004514 if (r)
Avi Kivity58972972009-02-24 22:26:47 +02004515 goto out3;
Sheng Yang25c5f222008-03-28 13:18:56 +08004516
Avi Kivity58972972009-02-24 22:26:47 +02004517 vmx_disable_intercept_for_msr(MSR_FS_BASE, false);
4518 vmx_disable_intercept_for_msr(MSR_GS_BASE, false);
4519 vmx_disable_intercept_for_msr(MSR_KERNEL_GS_BASE, true);
4520 vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_CS, false);
4521 vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_ESP, false);
4522 vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_EIP, false);
He, Qingfdef3ad2007-04-30 09:45:24 +03004523
Avi Kivity089d0342009-03-23 18:26:32 +02004524 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +08004525 bypass_guest_pf = 0;
Sheng Yang534e38b2008-09-08 15:12:30 +08004526 kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull,
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004527 VMX_EPT_EXECUTABLE_MASK);
Sheng Yang5fdbcb92008-07-16 09:25:40 +08004528 kvm_enable_tdp();
4529 } else
4530 kvm_disable_tdp();
Sheng Yang14394422008-04-28 12:24:45 +08004531
Avi Kivityc7addb92007-09-16 18:58:32 +02004532 if (bypass_guest_pf)
4533 kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull);
4534
He, Qingfdef3ad2007-04-30 09:45:24 +03004535 return 0;
4536
Avi Kivity58972972009-02-24 22:26:47 +02004537out3:
4538 free_page((unsigned long)vmx_msr_bitmap_longmode);
Sheng Yang25c5f222008-03-28 13:18:56 +08004539out2:
Avi Kivity58972972009-02-24 22:26:47 +02004540 free_page((unsigned long)vmx_msr_bitmap_legacy);
He, Qingfdef3ad2007-04-30 09:45:24 +03004541out1:
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004542 free_page((unsigned long)vmx_io_bitmap_b);
He, Qingfdef3ad2007-04-30 09:45:24 +03004543out:
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004544 free_page((unsigned long)vmx_io_bitmap_a);
He, Qingfdef3ad2007-04-30 09:45:24 +03004545 return r;
Avi Kivity6aa8b732006-12-10 02:21:36 -08004546}
4547
4548static void __exit vmx_exit(void)
4549{
Avi Kivity58972972009-02-24 22:26:47 +02004550 free_page((unsigned long)vmx_msr_bitmap_legacy);
4551 free_page((unsigned long)vmx_msr_bitmap_longmode);
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004552 free_page((unsigned long)vmx_io_bitmap_b);
4553 free_page((unsigned long)vmx_io_bitmap_a);
He, Qingfdef3ad2007-04-30 09:45:24 +03004554
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08004555 kvm_exit();
Avi Kivity6aa8b732006-12-10 02:21:36 -08004556}
4557
4558module_init(vmx_init)
4559module_exit(vmx_exit)