Ky Srinivasan | a2a47c6 | 2010-05-06 12:08:41 -0700 | [diff] [blame] | 1 | /* |
| 2 | * HyperV Detection code. |
| 3 | * |
| 4 | * Copyright (C) 2010, Novell, Inc. |
| 5 | * Author : K. Y. Srinivasan <ksrinivasan@novell.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
Greg Kroah-Hartman | 9fa0231 | 2010-05-07 16:55:41 -0700 | [diff] [blame] | 9 | * the Free Software Foundation; version 2 of the License. |
Ky Srinivasan | a2a47c6 | 2010-05-06 12:08:41 -0700 | [diff] [blame] | 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <linux/types.h> |
K. Y. Srinivasan | 6f4151c8 | 2011-09-07 15:25:10 -0700 | [diff] [blame] | 14 | #include <linux/time.h> |
| 15 | #include <linux/clocksource.h> |
Paul Gortmaker | 186f436 | 2016-07-13 20:18:56 -0400 | [diff] [blame] | 16 | #include <linux/init.h> |
| 17 | #include <linux/export.h> |
K. Y. Srinivasan | bc2b033 | 2013-02-03 17:22:39 -0800 | [diff] [blame] | 18 | #include <linux/hardirq.h> |
K. Y. Srinivasan | 9e7827b | 2013-09-30 17:28:52 +0200 | [diff] [blame] | 19 | #include <linux/efi.h> |
K. Y. Srinivasan | bc2b033 | 2013-02-03 17:22:39 -0800 | [diff] [blame] | 20 | #include <linux/interrupt.h> |
Thomas Gleixner | 1aec169 | 2014-02-23 21:40:22 +0000 | [diff] [blame] | 21 | #include <linux/irq.h> |
Vitaly Kuznetsov | 2517281 | 2015-08-01 16:08:07 -0700 | [diff] [blame] | 22 | #include <linux/kexec.h> |
Michael Kelley | 1de72c7 | 2018-11-04 03:48:57 +0000 | [diff] [blame] | 23 | #include <linux/i8253.h> |
Ky Srinivasan | a2a47c6 | 2010-05-06 12:08:41 -0700 | [diff] [blame] | 24 | #include <asm/processor.h> |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 25 | #include <asm/hypervisor.h> |
Vitaly Kuznetsov | 5a48580 | 2018-03-20 15:02:05 +0100 | [diff] [blame] | 26 | #include <asm/hyperv-tlfs.h> |
Ky Srinivasan | a2a47c6 | 2010-05-06 12:08:41 -0700 | [diff] [blame] | 27 | #include <asm/mshyperv.h> |
K. Y. Srinivasan | bc2b033 | 2013-02-03 17:22:39 -0800 | [diff] [blame] | 28 | #include <asm/desc.h> |
K. Y. Srinivasan | bc2b033 | 2013-02-03 17:22:39 -0800 | [diff] [blame] | 29 | #include <asm/irq_regs.h> |
K. Y. Srinivasan | 9e7827b | 2013-09-30 17:28:52 +0200 | [diff] [blame] | 30 | #include <asm/i8259.h> |
David Rientjes | d68ce01 | 2013-10-11 16:07:31 -0700 | [diff] [blame] | 31 | #include <asm/apic.h> |
Jason Wang | ca3ba2a | 2014-02-28 11:30:29 +0800 | [diff] [blame] | 32 | #include <asm/timer.h> |
Vitaly Kuznetsov | 2517281 | 2015-08-01 16:08:07 -0700 | [diff] [blame] | 33 | #include <asm/reboot.h> |
Vitaly Kuznetsov | 59107e2 | 2016-12-02 11:07:20 +0100 | [diff] [blame] | 34 | #include <asm/nmi.h> |
Ky Srinivasan | a2a47c6 | 2010-05-06 12:08:41 -0700 | [diff] [blame] | 35 | |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 36 | struct ms_hyperv_info ms_hyperv; |
Ky Srinivasan | 9279aa5 | 2010-06-28 08:48:55 -0600 | [diff] [blame] | 37 | EXPORT_SYMBOL_GPL(ms_hyperv); |
Ky Srinivasan | a2a47c6 | 2010-05-06 12:08:41 -0700 | [diff] [blame] | 38 | |
Thomas Gleixner | 3c43367 | 2014-03-04 23:39:58 +0100 | [diff] [blame] | 39 | #if IS_ENABLED(CONFIG_HYPERV) |
Thomas Gleixner | 76d388c | 2014-03-05 13:42:14 +0100 | [diff] [blame] | 40 | static void (*vmbus_handler)(void); |
Michael Kelley | 248e742 | 2018-03-04 22:17:18 -0700 | [diff] [blame] | 41 | static void (*hv_stimer0_handler)(void); |
Vitaly Kuznetsov | 1e03474 | 2015-09-23 12:02:57 +0200 | [diff] [blame] | 42 | static void (*hv_kexec_handler)(void); |
| 43 | static void (*hv_crash_handler)(struct pt_regs *regs); |
Thomas Gleixner | 1aec169 | 2014-02-23 21:40:22 +0000 | [diff] [blame] | 44 | |
Michael Kelley | e9a7fda | 2018-06-05 13:37:50 -0700 | [diff] [blame] | 45 | __visible void __irq_entry hyperv_vector_handler(struct pt_regs *regs) |
Thomas Gleixner | 1aec169 | 2014-02-23 21:40:22 +0000 | [diff] [blame] | 46 | { |
| 47 | struct pt_regs *old_regs = set_irq_regs(regs); |
| 48 | |
Thomas Gleixner | 6af7faf | 2015-05-15 15:48:25 +0200 | [diff] [blame] | 49 | entering_irq(); |
Thomas Gleixner | 1aec169 | 2014-02-23 21:40:22 +0000 | [diff] [blame] | 50 | inc_irq_stat(irq_hv_callback_count); |
| 51 | if (vmbus_handler) |
| 52 | vmbus_handler(); |
| 53 | |
Michael Kelley | 7dc9b6b | 2018-06-05 13:37:54 -0700 | [diff] [blame] | 54 | if (ms_hyperv.hints & HV_DEPRECATING_AEOI_RECOMMENDED) |
K. Y. Srinivasan | a33fd4c | 2017-03-28 17:16:53 -0700 | [diff] [blame] | 55 | ack_APIC_irq(); |
| 56 | |
Thomas Gleixner | 6af7faf | 2015-05-15 15:48:25 +0200 | [diff] [blame] | 57 | exiting_irq(); |
Thomas Gleixner | 1aec169 | 2014-02-23 21:40:22 +0000 | [diff] [blame] | 58 | set_irq_regs(old_regs); |
| 59 | } |
| 60 | |
Thomas Gleixner | 76d388c | 2014-03-05 13:42:14 +0100 | [diff] [blame] | 61 | void hv_setup_vmbus_irq(void (*handler)(void)) |
Thomas Gleixner | 1aec169 | 2014-02-23 21:40:22 +0000 | [diff] [blame] | 62 | { |
| 63 | vmbus_handler = handler; |
Thomas Gleixner | 1aec169 | 2014-02-23 21:40:22 +0000 | [diff] [blame] | 64 | } |
| 65 | |
Thomas Gleixner | 76d388c | 2014-03-05 13:42:14 +0100 | [diff] [blame] | 66 | void hv_remove_vmbus_irq(void) |
Thomas Gleixner | 1aec169 | 2014-02-23 21:40:22 +0000 | [diff] [blame] | 67 | { |
| 68 | /* We have no way to deallocate the interrupt gate */ |
| 69 | vmbus_handler = NULL; |
| 70 | } |
| 71 | EXPORT_SYMBOL_GPL(hv_setup_vmbus_irq); |
| 72 | EXPORT_SYMBOL_GPL(hv_remove_vmbus_irq); |
Vitaly Kuznetsov | 2517281 | 2015-08-01 16:08:07 -0700 | [diff] [blame] | 73 | |
Michael Kelley | 248e742 | 2018-03-04 22:17:18 -0700 | [diff] [blame] | 74 | /* |
| 75 | * Routines to do per-architecture handling of stimer0 |
| 76 | * interrupts when in Direct Mode |
| 77 | */ |
| 78 | |
| 79 | __visible void __irq_entry hv_stimer0_vector_handler(struct pt_regs *regs) |
| 80 | { |
| 81 | struct pt_regs *old_regs = set_irq_regs(regs); |
| 82 | |
| 83 | entering_irq(); |
| 84 | inc_irq_stat(hyperv_stimer0_count); |
| 85 | if (hv_stimer0_handler) |
| 86 | hv_stimer0_handler(); |
| 87 | ack_APIC_irq(); |
| 88 | |
| 89 | exiting_irq(); |
| 90 | set_irq_regs(old_regs); |
| 91 | } |
| 92 | |
| 93 | int hv_setup_stimer0_irq(int *irq, int *vector, void (*handler)(void)) |
| 94 | { |
| 95 | *vector = HYPERV_STIMER0_VECTOR; |
| 96 | *irq = 0; /* Unused on x86/x64 */ |
| 97 | hv_stimer0_handler = handler; |
| 98 | return 0; |
| 99 | } |
| 100 | EXPORT_SYMBOL_GPL(hv_setup_stimer0_irq); |
| 101 | |
| 102 | void hv_remove_stimer0_irq(int irq) |
| 103 | { |
| 104 | /* We have no way to deallocate the interrupt gate */ |
| 105 | hv_stimer0_handler = NULL; |
| 106 | } |
| 107 | EXPORT_SYMBOL_GPL(hv_remove_stimer0_irq); |
| 108 | |
Vitaly Kuznetsov | 2517281 | 2015-08-01 16:08:07 -0700 | [diff] [blame] | 109 | void hv_setup_kexec_handler(void (*handler)(void)) |
| 110 | { |
| 111 | hv_kexec_handler = handler; |
| 112 | } |
| 113 | EXPORT_SYMBOL_GPL(hv_setup_kexec_handler); |
| 114 | |
| 115 | void hv_remove_kexec_handler(void) |
| 116 | { |
| 117 | hv_kexec_handler = NULL; |
| 118 | } |
| 119 | EXPORT_SYMBOL_GPL(hv_remove_kexec_handler); |
Vitaly Kuznetsov | b4370df | 2015-08-01 16:08:09 -0700 | [diff] [blame] | 120 | |
| 121 | void hv_setup_crash_handler(void (*handler)(struct pt_regs *regs)) |
| 122 | { |
| 123 | hv_crash_handler = handler; |
| 124 | } |
| 125 | EXPORT_SYMBOL_GPL(hv_setup_crash_handler); |
| 126 | |
| 127 | void hv_remove_crash_handler(void) |
| 128 | { |
| 129 | hv_crash_handler = NULL; |
| 130 | } |
| 131 | EXPORT_SYMBOL_GPL(hv_remove_crash_handler); |
Thomas Gleixner | 1aec169 | 2014-02-23 21:40:22 +0000 | [diff] [blame] | 132 | |
Vitaly Kuznetsov | 1e03474 | 2015-09-23 12:02:57 +0200 | [diff] [blame] | 133 | #ifdef CONFIG_KEXEC_CORE |
Vitaly Kuznetsov | 2517281 | 2015-08-01 16:08:07 -0700 | [diff] [blame] | 134 | static void hv_machine_shutdown(void) |
| 135 | { |
| 136 | if (kexec_in_progress && hv_kexec_handler) |
| 137 | hv_kexec_handler(); |
| 138 | native_machine_shutdown(); |
| 139 | } |
| 140 | |
Vitaly Kuznetsov | b4370df | 2015-08-01 16:08:09 -0700 | [diff] [blame] | 141 | static void hv_machine_crash_shutdown(struct pt_regs *regs) |
| 142 | { |
| 143 | if (hv_crash_handler) |
| 144 | hv_crash_handler(regs); |
| 145 | native_machine_crash_shutdown(regs); |
| 146 | } |
Vitaly Kuznetsov | 1e03474 | 2015-09-23 12:02:57 +0200 | [diff] [blame] | 147 | #endif /* CONFIG_KEXEC_CORE */ |
| 148 | #endif /* CONFIG_HYPERV */ |
Vitaly Kuznetsov | b4370df | 2015-08-01 16:08:09 -0700 | [diff] [blame] | 149 | |
Jason Wang | 9df56f1 | 2013-07-25 16:54:35 +0800 | [diff] [blame] | 150 | static uint32_t __init ms_hyperv_platform(void) |
Ky Srinivasan | a2a47c6 | 2010-05-06 12:08:41 -0700 | [diff] [blame] | 151 | { |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 152 | u32 eax; |
| 153 | u32 hyp_signature[3]; |
Ky Srinivasan | a2a47c6 | 2010-05-06 12:08:41 -0700 | [diff] [blame] | 154 | |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 155 | if (!boot_cpu_has(X86_FEATURE_HYPERVISOR)) |
Jason Wang | 9df56f1 | 2013-07-25 16:54:35 +0800 | [diff] [blame] | 156 | return 0; |
Ky Srinivasan | a2a47c6 | 2010-05-06 12:08:41 -0700 | [diff] [blame] | 157 | |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 158 | cpuid(HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS, |
| 159 | &eax, &hyp_signature[0], &hyp_signature[1], &hyp_signature[2]); |
Ky Srinivasan | a2a47c6 | 2010-05-06 12:08:41 -0700 | [diff] [blame] | 160 | |
Jason Wang | 9df56f1 | 2013-07-25 16:54:35 +0800 | [diff] [blame] | 161 | if (eax >= HYPERV_CPUID_MIN && |
| 162 | eax <= HYPERV_CPUID_MAX && |
| 163 | !memcmp("Microsoft Hv", hyp_signature, 12)) |
| 164 | return HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS; |
| 165 | |
| 166 | return 0; |
Ky Srinivasan | a2a47c6 | 2010-05-06 12:08:41 -0700 | [diff] [blame] | 167 | } |
| 168 | |
Vitaly Kuznetsov | 1e2ae9e | 2016-04-15 15:50:32 +0200 | [diff] [blame] | 169 | static unsigned char hv_get_nmi_reason(void) |
| 170 | { |
| 171 | return 0; |
| 172 | } |
| 173 | |
Vitaly Kuznetsov | 59107e2 | 2016-12-02 11:07:20 +0100 | [diff] [blame] | 174 | #ifdef CONFIG_X86_LOCAL_APIC |
| 175 | /* |
| 176 | * Prior to WS2016 Debug-VM sends NMIs to all CPUs which makes |
| 177 | * it dificult to process CHANNELMSG_UNLOAD in case of crash. Handle |
| 178 | * unknown NMI on the first CPU which gets it. |
| 179 | */ |
| 180 | static int hv_nmi_unknown(unsigned int val, struct pt_regs *regs) |
| 181 | { |
| 182 | static atomic_t nmi_cpu = ATOMIC_INIT(-1); |
| 183 | |
| 184 | if (!unknown_nmi_panic) |
| 185 | return NMI_DONE; |
| 186 | |
| 187 | if (atomic_cmpxchg(&nmi_cpu, -1, raw_smp_processor_id()) != -1) |
| 188 | return NMI_HANDLED; |
| 189 | |
| 190 | return NMI_DONE; |
| 191 | } |
| 192 | #endif |
| 193 | |
Vitaly Kuznetsov | 71c2a2d | 2017-06-22 18:07:30 +0800 | [diff] [blame] | 194 | static unsigned long hv_get_tsc_khz(void) |
| 195 | { |
| 196 | unsigned long freq; |
| 197 | |
| 198 | rdmsrl(HV_X64_MSR_TSC_FREQUENCY, freq); |
| 199 | |
| 200 | return freq / 1000; |
| 201 | } |
| 202 | |
Yi Sun | 3a025de | 2018-10-08 16:29:34 +0800 | [diff] [blame] | 203 | #if defined(CONFIG_SMP) && IS_ENABLED(CONFIG_HYPERV) |
| 204 | static void __init hv_smp_prepare_boot_cpu(void) |
| 205 | { |
| 206 | native_smp_prepare_boot_cpu(); |
| 207 | #if defined(CONFIG_X86_64) && defined(CONFIG_PARAVIRT_SPINLOCKS) |
| 208 | hv_init_spinlocks(); |
| 209 | #endif |
| 210 | } |
| 211 | #endif |
| 212 | |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 213 | static void __init ms_hyperv_init_platform(void) |
Ky Srinivasan | a2a47c6 | 2010-05-06 12:08:41 -0700 | [diff] [blame] | 214 | { |
K. Y. Srinivasan | 8de8af7 | 2017-01-19 11:51:47 -0700 | [diff] [blame] | 215 | int hv_host_info_eax; |
| 216 | int hv_host_info_ebx; |
| 217 | int hv_host_info_ecx; |
| 218 | int hv_host_info_edx; |
| 219 | |
Ky Srinivasan | a2a47c6 | 2010-05-06 12:08:41 -0700 | [diff] [blame] | 220 | /* |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 221 | * Extract the features and hints |
Ky Srinivasan | a2a47c6 | 2010-05-06 12:08:41 -0700 | [diff] [blame] | 222 | */ |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 223 | ms_hyperv.features = cpuid_eax(HYPERV_CPUID_FEATURES); |
Denis V. Lunev | cc2dd40 | 2015-08-01 16:08:20 -0700 | [diff] [blame] | 224 | ms_hyperv.misc_features = cpuid_edx(HYPERV_CPUID_FEATURES); |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 225 | ms_hyperv.hints = cpuid_eax(HYPERV_CPUID_ENLIGHTMENT_INFO); |
Ky Srinivasan | a2a47c6 | 2010-05-06 12:08:41 -0700 | [diff] [blame] | 226 | |
Vitaly Kuznetsov | dd01859 | 2017-06-25 10:06:41 -0700 | [diff] [blame] | 227 | pr_info("Hyper-V: features 0x%x, hints 0x%x\n", |
Chen Yucong | 1b74dde | 2016-02-02 11:45:02 +0800 | [diff] [blame] | 228 | ms_hyperv.features, ms_hyperv.hints); |
K. Y. Srinivasan | 6f4151c8 | 2011-09-07 15:25:10 -0700 | [diff] [blame] | 229 | |
Vitaly Kuznetsov | 415bd1c | 2018-03-20 15:02:06 +0100 | [diff] [blame] | 230 | ms_hyperv.max_vp_index = cpuid_eax(HYPERV_CPUID_IMPLEMENT_LIMITS); |
| 231 | ms_hyperv.max_lp_index = cpuid_ebx(HYPERV_CPUID_IMPLEMENT_LIMITS); |
Vitaly Kuznetsov | dd01859 | 2017-06-25 10:06:41 -0700 | [diff] [blame] | 232 | |
| 233 | pr_debug("Hyper-V: max %u virtual processors, %u logical processors\n", |
| 234 | ms_hyperv.max_vp_index, ms_hyperv.max_lp_index); |
| 235 | |
K. Y. Srinivasan | 8de8af7 | 2017-01-19 11:51:47 -0700 | [diff] [blame] | 236 | /* |
| 237 | * Extract host information. |
| 238 | */ |
Vitaly Kuznetsov | 415bd1c | 2018-03-20 15:02:06 +0100 | [diff] [blame] | 239 | if (cpuid_eax(HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS) >= |
| 240 | HYPERV_CPUID_VERSION) { |
| 241 | hv_host_info_eax = cpuid_eax(HYPERV_CPUID_VERSION); |
| 242 | hv_host_info_ebx = cpuid_ebx(HYPERV_CPUID_VERSION); |
| 243 | hv_host_info_ecx = cpuid_ecx(HYPERV_CPUID_VERSION); |
| 244 | hv_host_info_edx = cpuid_edx(HYPERV_CPUID_VERSION); |
K. Y. Srinivasan | 8de8af7 | 2017-01-19 11:51:47 -0700 | [diff] [blame] | 245 | |
| 246 | pr_info("Hyper-V Host Build:%d-%d.%d-%d-%d.%d\n", |
| 247 | hv_host_info_eax, hv_host_info_ebx >> 16, |
| 248 | hv_host_info_ebx & 0xFFFF, hv_host_info_ecx, |
| 249 | hv_host_info_edx >> 24, hv_host_info_edx & 0xFFFFFF); |
| 250 | } |
| 251 | |
Vitaly Kuznetsov | 71c2a2d | 2017-06-22 18:07:30 +0800 | [diff] [blame] | 252 | if (ms_hyperv.features & HV_X64_ACCESS_FREQUENCY_MSRS && |
| 253 | ms_hyperv.misc_features & HV_FEATURE_FREQUENCY_MSRS_AVAILABLE) { |
| 254 | x86_platform.calibrate_tsc = hv_get_tsc_khz; |
| 255 | x86_platform.calibrate_cpu = hv_get_tsc_khz; |
| 256 | } |
| 257 | |
Vitaly Kuznetsov | 5431390b | 2018-03-20 15:02:10 +0100 | [diff] [blame] | 258 | if (ms_hyperv.hints & HV_X64_ENLIGHTENED_VMCS_RECOMMENDED) { |
| 259 | ms_hyperv.nested_features = |
| 260 | cpuid_eax(HYPERV_CPUID_NESTED_FEATURES); |
| 261 | } |
| 262 | |
K. Y. Srinivasan | 90ab9d5 | 2013-10-10 15:30:24 -0700 | [diff] [blame] | 263 | #ifdef CONFIG_X86_LOCAL_APIC |
Vitaly Kuznetsov | 2cf0284 | 2017-06-22 18:07:29 +0800 | [diff] [blame] | 264 | if (ms_hyperv.features & HV_X64_ACCESS_FREQUENCY_MSRS && |
| 265 | ms_hyperv.misc_features & HV_FEATURE_FREQUENCY_MSRS_AVAILABLE) { |
K. Y. Srinivasan | 9e7827b | 2013-09-30 17:28:52 +0200 | [diff] [blame] | 266 | /* |
| 267 | * Get the APIC frequency. |
| 268 | */ |
H. Peter Anvin | 4c08edd | 2013-11-06 10:00:05 -0800 | [diff] [blame] | 269 | u64 hv_lapic_frequency; |
| 270 | |
K. Y. Srinivasan | 9e7827b | 2013-09-30 17:28:52 +0200 | [diff] [blame] | 271 | rdmsrl(HV_X64_MSR_APIC_FREQUENCY, hv_lapic_frequency); |
| 272 | hv_lapic_frequency = div_u64(hv_lapic_frequency, HZ); |
| 273 | lapic_timer_frequency = hv_lapic_frequency; |
Vitaly Kuznetsov | dd01859 | 2017-06-25 10:06:41 -0700 | [diff] [blame] | 274 | pr_info("Hyper-V: LAPIC Timer Frequency: %#x\n", |
Chen Yucong | 1b74dde | 2016-02-02 11:45:02 +0800 | [diff] [blame] | 275 | lapic_timer_frequency); |
K. Y. Srinivasan | 9e7827b | 2013-09-30 17:28:52 +0200 | [diff] [blame] | 276 | } |
Vitaly Kuznetsov | 59107e2 | 2016-12-02 11:07:20 +0100 | [diff] [blame] | 277 | |
| 278 | register_nmi_handler(NMI_UNKNOWN, hv_nmi_unknown, NMI_FLAG_FIRST, |
| 279 | "hv_nmi_unknown"); |
K. Y. Srinivasan | 90ab9d5 | 2013-10-10 15:30:24 -0700 | [diff] [blame] | 280 | #endif |
K. Y. Srinivasan | 9e7827b | 2013-09-30 17:28:52 +0200 | [diff] [blame] | 281 | |
Jason Wang | ca3ba2a | 2014-02-28 11:30:29 +0800 | [diff] [blame] | 282 | #ifdef CONFIG_X86_IO_APIC |
| 283 | no_timer_check = 1; |
| 284 | #endif |
| 285 | |
Vitaly Kuznetsov | 1e03474 | 2015-09-23 12:02:57 +0200 | [diff] [blame] | 286 | #if IS_ENABLED(CONFIG_HYPERV) && defined(CONFIG_KEXEC_CORE) |
Vitaly Kuznetsov | 2517281 | 2015-08-01 16:08:07 -0700 | [diff] [blame] | 287 | machine_ops.shutdown = hv_machine_shutdown; |
Vitaly Kuznetsov | b4370df | 2015-08-01 16:08:09 -0700 | [diff] [blame] | 288 | machine_ops.crash_shutdown = hv_machine_crash_shutdown; |
Vitaly Kuznetsov | 1e03474 | 2015-09-23 12:02:57 +0200 | [diff] [blame] | 289 | #endif |
Vitaly Kuznetsov | 88c9281 | 2015-08-19 09:54:24 -0700 | [diff] [blame] | 290 | mark_tsc_unstable("running on Hyper-V"); |
Vitaly Kuznetsov | 1e2ae9e | 2016-04-15 15:50:32 +0200 | [diff] [blame] | 291 | |
| 292 | /* |
| 293 | * Generation 2 instances don't support reading the NMI status from |
| 294 | * 0x61 port. |
| 295 | */ |
| 296 | if (efi_enabled(EFI_BOOT)) |
| 297 | x86_platform.get_nmi_reason = hv_get_nmi_reason; |
K. Y. Srinivasan | 8730046 | 2017-01-18 16:45:02 -0700 | [diff] [blame] | 298 | |
Michael Kelley | 1de72c7 | 2018-11-04 03:48:57 +0000 | [diff] [blame] | 299 | /* |
| 300 | * Hyper-V VMs have a PIT emulation quirk such that zeroing the |
| 301 | * counter register during PIT shutdown restarts the PIT. So it |
| 302 | * continues to interrupt @18.2 HZ. Setting i8253_clear_counter |
| 303 | * to false tells pit_shutdown() not to zero the counter so that |
| 304 | * the PIT really is shutdown. Generation 2 VMs don't have a PIT, |
| 305 | * and setting this value has no effect. |
| 306 | */ |
| 307 | i8253_clear_counter_on_shutdown = false; |
| 308 | |
K. Y. Srinivasan | 8730046 | 2017-01-18 16:45:02 -0700 | [diff] [blame] | 309 | #if IS_ENABLED(CONFIG_HYPERV) |
| 310 | /* |
| 311 | * Setup the hook to get control post apic initialization. |
| 312 | */ |
| 313 | x86_platform.apic_post_init = hyperv_init; |
Vitaly Kuznetsov | 2ffd9e3 | 2017-08-02 18:09:19 +0200 | [diff] [blame] | 314 | hyperv_setup_mmu_ops(); |
K. Y. Srinivasan | 213ff44 | 2017-09-08 16:15:57 -0700 | [diff] [blame] | 315 | /* Setup the IDT for hypervisor callback */ |
| 316 | alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, hyperv_callback_vector); |
Vitaly Kuznetsov | 9328626 | 2018-01-24 14:23:33 +0100 | [diff] [blame] | 317 | |
| 318 | /* Setup the IDT for reenlightenment notifications */ |
| 319 | if (ms_hyperv.features & HV_X64_ACCESS_REENLIGHTENMENT) |
| 320 | alloc_intr_gate(HYPERV_REENLIGHTENMENT_VECTOR, |
| 321 | hyperv_reenlightenment_vector); |
| 322 | |
Michael Kelley | 248e742 | 2018-03-04 22:17:18 -0700 | [diff] [blame] | 323 | /* Setup the IDT for stimer0 */ |
Michael Kelley | 7dc9b6b | 2018-06-05 13:37:54 -0700 | [diff] [blame] | 324 | if (ms_hyperv.misc_features & HV_STIMER_DIRECT_MODE_AVAILABLE) |
Michael Kelley | 248e742 | 2018-03-04 22:17:18 -0700 | [diff] [blame] | 325 | alloc_intr_gate(HYPERV_STIMER0_VECTOR, |
| 326 | hv_stimer0_callback_vector); |
Yi Sun | 3a025de | 2018-10-08 16:29:34 +0800 | [diff] [blame] | 327 | |
| 328 | # ifdef CONFIG_SMP |
| 329 | smp_ops.smp_prepare_boot_cpu = hv_smp_prepare_boot_cpu; |
| 330 | # endif |
Lan Tianyu | 84fdfaf | 2019-02-27 22:54:03 +0800 | [diff] [blame] | 331 | |
| 332 | /* |
| 333 | * Hyper-V doesn't provide irq remapping for IO-APIC. To enable x2apic, |
| 334 | * set x2apic destination mode to physcial mode when x2apic is available |
| 335 | * and Hyper-V IOMMU driver makes sure cpus assigned with IO-APIC irqs |
| 336 | * have 8-bit APIC id. |
| 337 | */ |
| 338 | # ifdef CONFIG_X86_X2APIC |
| 339 | if (x2apic_supported()) |
| 340 | x2apic_phys = 1; |
| 341 | # endif |
| 342 | |
K. Y. Srinivasan | 8730046 | 2017-01-18 16:45:02 -0700 | [diff] [blame] | 343 | #endif |
Ky Srinivasan | a2a47c6 | 2010-05-06 12:08:41 -0700 | [diff] [blame] | 344 | } |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 345 | |
Juergen Gross | 03b2a32 | 2017-11-09 14:27:36 +0100 | [diff] [blame] | 346 | const __initconst struct hypervisor_x86 x86_hyper_ms_hyperv = { |
Vitaly Kuznetsov | dd01859 | 2017-06-25 10:06:41 -0700 | [diff] [blame] | 347 | .name = "Microsoft Hyper-V", |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 348 | .detect = ms_hyperv_platform, |
Juergen Gross | 03b2a32 | 2017-11-09 14:27:36 +0100 | [diff] [blame] | 349 | .type = X86_HYPER_MS_HYPERV, |
Juergen Gross | f72e38e | 2017-11-09 14:27:35 +0100 | [diff] [blame] | 350 | .init.init_platform = ms_hyperv_init_platform, |
H. Peter Anvin | e08cae4 | 2010-05-07 16:57:28 -0700 | [diff] [blame] | 351 | }; |