Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1 | /* |
| 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. |
| 8 | * |
| 9 | * Authors: |
| 10 | * Avi Kivity <avi@qumranet.com> |
| 11 | * Yaniv Kamay <yaniv@qumranet.com> |
| 12 | * |
| 13 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 14 | * the COPYING file in the top-level directory. |
| 15 | * |
| 16 | */ |
| 17 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 18 | #include "irq.h" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 19 | #include "vmx.h" |
Zhang Xiantao | 1d737c8 | 2007-12-14 09:35:10 +0800 | [diff] [blame] | 20 | #include "mmu.h" |
Avi Kivity | e495606 | 2007-06-28 14:15:57 -0400 | [diff] [blame] | 21 | |
Avi Kivity | edf8841 | 2007-12-16 11:02:48 +0200 | [diff] [blame] | 22 | #include <linux/kvm_host.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 23 | #include <linux/module.h> |
Ahmed S. Darwish | 9d8f549 | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 24 | #include <linux/kernel.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 25 | #include <linux/mm.h> |
| 26 | #include <linux/highmem.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 27 | #include <linux/sched.h> |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame] | 28 | #include <linux/moduleparam.h> |
Avi Kivity | e495606 | 2007-06-28 14:15:57 -0400 | [diff] [blame] | 29 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 30 | #include <asm/io.h> |
Anthony Liguori | 3b3be0d | 2006-12-13 00:33:43 -0800 | [diff] [blame] | 31 | #include <asm/desc.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 32 | |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 33 | #define __ex(x) __kvm_handle_fault_on_reboot(x) |
| 34 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 35 | MODULE_AUTHOR("Qumranet"); |
| 36 | MODULE_LICENSE("GPL"); |
| 37 | |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame] | 38 | static int bypass_guest_pf = 1; |
| 39 | module_param(bypass_guest_pf, bool, 0); |
| 40 | |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 41 | static int enable_vpid = 1; |
| 42 | module_param(enable_vpid, bool, 0); |
| 43 | |
Avi Kivity | 4c9fc8e | 2008-03-24 18:15:14 +0200 | [diff] [blame] | 44 | static int flexpriority_enabled = 1; |
| 45 | module_param(flexpriority_enabled, bool, 0); |
| 46 | |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 47 | static int enable_ept = 1; |
Sheng Yang | d56f546 | 2008-04-25 10:13:16 +0800 | [diff] [blame] | 48 | module_param(enable_ept, bool, 0); |
| 49 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 50 | struct vmcs { |
| 51 | u32 revision_id; |
| 52 | u32 abort; |
| 53 | char data[0]; |
| 54 | }; |
| 55 | |
| 56 | struct vcpu_vmx { |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 57 | struct kvm_vcpu vcpu; |
Avi Kivity | 543e424 | 2008-05-13 16:22:47 +0300 | [diff] [blame] | 58 | struct list_head local_vcpus_link; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 59 | int launched; |
Avi Kivity | 29bd8a7 | 2007-09-10 17:27:03 +0300 | [diff] [blame] | 60 | u8 fail; |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 61 | u32 idt_vectoring_info; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 62 | struct kvm_msr_entry *guest_msrs; |
| 63 | struct kvm_msr_entry *host_msrs; |
| 64 | int nmsrs; |
| 65 | int save_nmsrs; |
| 66 | int msr_offset_efer; |
| 67 | #ifdef CONFIG_X86_64 |
| 68 | int msr_offset_kernel_gs_base; |
| 69 | #endif |
| 70 | struct vmcs *vmcs; |
| 71 | struct { |
| 72 | int loaded; |
| 73 | u16 fs_sel, gs_sel, ldt_sel; |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 74 | int gs_ldt_reload_needed; |
| 75 | int fs_reload_needed; |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 76 | int guest_efer_loaded; |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 77 | } host_state; |
Avi Kivity | 9c8cba3 | 2007-11-22 11:42:59 +0200 | [diff] [blame] | 78 | struct { |
| 79 | struct { |
| 80 | bool pending; |
| 81 | u8 vector; |
| 82 | unsigned rip; |
| 83 | } irq; |
| 84 | } rmode; |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 85 | int vpid; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 86 | }; |
| 87 | |
| 88 | static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu) |
| 89 | { |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 90 | return container_of(vcpu, struct vcpu_vmx, vcpu); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 91 | } |
| 92 | |
Sheng Yang | b7ebfb0 | 2008-04-25 21:44:52 +0800 | [diff] [blame] | 93 | static int init_rmode(struct kvm *kvm); |
Sheng Yang | 4e1096d | 2008-07-06 19:16:51 +0800 | [diff] [blame] | 94 | static u64 construct_eptp(unsigned long root_hpa); |
Avi Kivity | 75880a0 | 2007-06-20 11:20:04 +0300 | [diff] [blame] | 95 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 96 | static DEFINE_PER_CPU(struct vmcs *, vmxarea); |
| 97 | static DEFINE_PER_CPU(struct vmcs *, current_vmcs); |
Avi Kivity | 543e424 | 2008-05-13 16:22:47 +0300 | [diff] [blame] | 98 | static DEFINE_PER_CPU(struct list_head, vcpus_on_cpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 99 | |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 100 | static struct page *vmx_io_bitmap_a; |
| 101 | static struct page *vmx_io_bitmap_b; |
Sheng Yang | 25c5f22 | 2008-03-28 13:18:56 +0800 | [diff] [blame] | 102 | static struct page *vmx_msr_bitmap; |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 103 | |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 104 | static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS); |
| 105 | static DEFINE_SPINLOCK(vmx_vpid_lock); |
| 106 | |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 107 | static struct vmcs_config { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 108 | int size; |
| 109 | int order; |
| 110 | u32 revision_id; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 111 | u32 pin_based_exec_ctrl; |
| 112 | u32 cpu_based_exec_ctrl; |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 113 | u32 cpu_based_2nd_exec_ctrl; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 114 | u32 vmexit_ctrl; |
| 115 | u32 vmentry_ctrl; |
| 116 | } vmcs_config; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 117 | |
Sheng Yang | d56f546 | 2008-04-25 10:13:16 +0800 | [diff] [blame] | 118 | struct vmx_capability { |
| 119 | u32 ept; |
| 120 | u32 vpid; |
| 121 | } vmx_capability; |
| 122 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 123 | #define VMX_SEGMENT_FIELD(seg) \ |
| 124 | [VCPU_SREG_##seg] = { \ |
| 125 | .selector = GUEST_##seg##_SELECTOR, \ |
| 126 | .base = GUEST_##seg##_BASE, \ |
| 127 | .limit = GUEST_##seg##_LIMIT, \ |
| 128 | .ar_bytes = GUEST_##seg##_AR_BYTES, \ |
| 129 | } |
| 130 | |
| 131 | static struct kvm_vmx_segment_field { |
| 132 | unsigned selector; |
| 133 | unsigned base; |
| 134 | unsigned limit; |
| 135 | unsigned ar_bytes; |
| 136 | } kvm_vmx_segment_fields[] = { |
| 137 | VMX_SEGMENT_FIELD(CS), |
| 138 | VMX_SEGMENT_FIELD(DS), |
| 139 | VMX_SEGMENT_FIELD(ES), |
| 140 | VMX_SEGMENT_FIELD(FS), |
| 141 | VMX_SEGMENT_FIELD(GS), |
| 142 | VMX_SEGMENT_FIELD(SS), |
| 143 | VMX_SEGMENT_FIELD(TR), |
| 144 | VMX_SEGMENT_FIELD(LDTR), |
| 145 | }; |
| 146 | |
Avi Kivity | 4d56c8a | 2007-04-19 14:28:44 +0300 | [diff] [blame] | 147 | /* |
| 148 | * Keep MSR_K6_STAR at the end, as setup_msrs() will try to optimize it |
| 149 | * away by decrementing the array size. |
| 150 | */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 151 | static const u32 vmx_msr_index[] = { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 152 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 153 | MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, MSR_KERNEL_GS_BASE, |
| 154 | #endif |
| 155 | MSR_EFER, MSR_K6_STAR, |
| 156 | }; |
Ahmed S. Darwish | 9d8f549 | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 157 | #define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 158 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 159 | static void load_msrs(struct kvm_msr_entry *e, int n) |
| 160 | { |
| 161 | int i; |
| 162 | |
| 163 | for (i = 0; i < n; ++i) |
| 164 | wrmsrl(e[i].index, e[i].data); |
| 165 | } |
| 166 | |
| 167 | static void save_msrs(struct kvm_msr_entry *e, int n) |
| 168 | { |
| 169 | int i; |
| 170 | |
| 171 | for (i = 0; i < n; ++i) |
| 172 | rdmsrl(e[i].index, e[i].data); |
| 173 | } |
| 174 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 175 | static inline int is_page_fault(u32 intr_info) |
| 176 | { |
| 177 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | |
| 178 | INTR_INFO_VALID_MASK)) == |
| 179 | (INTR_TYPE_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK); |
| 180 | } |
| 181 | |
Anthony Liguori | 2ab455c | 2007-04-27 09:29:49 +0300 | [diff] [blame] | 182 | static inline int is_no_device(u32 intr_info) |
| 183 | { |
| 184 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | |
| 185 | INTR_INFO_VALID_MASK)) == |
| 186 | (INTR_TYPE_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK); |
| 187 | } |
| 188 | |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 189 | static inline int is_invalid_opcode(u32 intr_info) |
| 190 | { |
| 191 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | |
| 192 | INTR_INFO_VALID_MASK)) == |
| 193 | (INTR_TYPE_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK); |
| 194 | } |
| 195 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 196 | static inline int is_external_interrupt(u32 intr_info) |
| 197 | { |
| 198 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) |
| 199 | == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); |
| 200 | } |
| 201 | |
Sheng Yang | 25c5f22 | 2008-03-28 13:18:56 +0800 | [diff] [blame] | 202 | static inline int cpu_has_vmx_msr_bitmap(void) |
| 203 | { |
| 204 | return (vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS); |
| 205 | } |
| 206 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 207 | static inline int cpu_has_vmx_tpr_shadow(void) |
| 208 | { |
| 209 | return (vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW); |
| 210 | } |
| 211 | |
| 212 | static inline int vm_need_tpr_shadow(struct kvm *kvm) |
| 213 | { |
| 214 | return ((cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm))); |
| 215 | } |
| 216 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 217 | static inline int cpu_has_secondary_exec_ctrls(void) |
| 218 | { |
| 219 | return (vmcs_config.cpu_based_exec_ctrl & |
| 220 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS); |
| 221 | } |
| 222 | |
Avi Kivity | 774ead3 | 2007-12-26 13:57:04 +0200 | [diff] [blame] | 223 | static inline bool cpu_has_vmx_virtualize_apic_accesses(void) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 224 | { |
Avi Kivity | 4c9fc8e | 2008-03-24 18:15:14 +0200 | [diff] [blame] | 225 | return flexpriority_enabled |
| 226 | && (vmcs_config.cpu_based_2nd_exec_ctrl & |
| 227 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 228 | } |
| 229 | |
Sheng Yang | d56f546 | 2008-04-25 10:13:16 +0800 | [diff] [blame] | 230 | static inline int cpu_has_vmx_invept_individual_addr(void) |
| 231 | { |
| 232 | return (!!(vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT)); |
| 233 | } |
| 234 | |
| 235 | static inline int cpu_has_vmx_invept_context(void) |
| 236 | { |
| 237 | return (!!(vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT)); |
| 238 | } |
| 239 | |
| 240 | static inline int cpu_has_vmx_invept_global(void) |
| 241 | { |
| 242 | return (!!(vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT)); |
| 243 | } |
| 244 | |
| 245 | static inline int cpu_has_vmx_ept(void) |
| 246 | { |
| 247 | return (vmcs_config.cpu_based_2nd_exec_ctrl & |
| 248 | SECONDARY_EXEC_ENABLE_EPT); |
| 249 | } |
| 250 | |
| 251 | static inline int vm_need_ept(void) |
| 252 | { |
| 253 | return (cpu_has_vmx_ept() && enable_ept); |
| 254 | } |
| 255 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 256 | static inline int vm_need_virtualize_apic_accesses(struct kvm *kvm) |
| 257 | { |
| 258 | return ((cpu_has_vmx_virtualize_apic_accesses()) && |
| 259 | (irqchip_in_kernel(kvm))); |
| 260 | } |
| 261 | |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 262 | static inline int cpu_has_vmx_vpid(void) |
| 263 | { |
| 264 | return (vmcs_config.cpu_based_2nd_exec_ctrl & |
| 265 | SECONDARY_EXEC_ENABLE_VPID); |
| 266 | } |
| 267 | |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 268 | static inline int cpu_has_virtual_nmis(void) |
| 269 | { |
| 270 | return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS; |
| 271 | } |
| 272 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 273 | static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr) |
Avi Kivity | 7725f0b | 2006-12-13 00:34:01 -0800 | [diff] [blame] | 274 | { |
| 275 | int i; |
| 276 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 277 | for (i = 0; i < vmx->nmsrs; ++i) |
| 278 | if (vmx->guest_msrs[i].index == msr) |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 279 | return i; |
| 280 | return -1; |
| 281 | } |
| 282 | |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 283 | static inline void __invvpid(int ext, u16 vpid, gva_t gva) |
| 284 | { |
| 285 | struct { |
| 286 | u64 vpid : 16; |
| 287 | u64 rsvd : 48; |
| 288 | u64 gva; |
| 289 | } operand = { vpid, 0, gva }; |
| 290 | |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 291 | asm volatile (__ex(ASM_VMX_INVVPID) |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 292 | /* CF==1 or ZF==1 --> rc = -1 */ |
| 293 | "; ja 1f ; ud2 ; 1:" |
| 294 | : : "a"(&operand), "c"(ext) : "cc", "memory"); |
| 295 | } |
| 296 | |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 297 | static inline void __invept(int ext, u64 eptp, gpa_t gpa) |
| 298 | { |
| 299 | struct { |
| 300 | u64 eptp, gpa; |
| 301 | } operand = {eptp, gpa}; |
| 302 | |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 303 | asm volatile (__ex(ASM_VMX_INVEPT) |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 304 | /* CF==1 or ZF==1 --> rc = -1 */ |
| 305 | "; ja 1f ; ud2 ; 1:\n" |
| 306 | : : "a" (&operand), "c" (ext) : "cc", "memory"); |
| 307 | } |
| 308 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 309 | static struct kvm_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr) |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 310 | { |
| 311 | int i; |
| 312 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 313 | i = __find_msr_index(vmx, msr); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 314 | if (i >= 0) |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 315 | return &vmx->guest_msrs[i]; |
Al Viro | 8b6d44c | 2007-02-09 16:38:40 +0000 | [diff] [blame] | 316 | return NULL; |
Avi Kivity | 7725f0b | 2006-12-13 00:34:01 -0800 | [diff] [blame] | 317 | } |
| 318 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 319 | static void vmcs_clear(struct vmcs *vmcs) |
| 320 | { |
| 321 | u64 phys_addr = __pa(vmcs); |
| 322 | u8 error; |
| 323 | |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 324 | asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 325 | : "=g"(error) : "a"(&phys_addr), "m"(phys_addr) |
| 326 | : "cc", "memory"); |
| 327 | if (error) |
| 328 | printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n", |
| 329 | vmcs, phys_addr); |
| 330 | } |
| 331 | |
| 332 | static void __vcpu_clear(void *arg) |
| 333 | { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 334 | struct vcpu_vmx *vmx = arg; |
Ingo Molnar | d3b2c33 | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 335 | int cpu = raw_smp_processor_id(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 336 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 337 | if (vmx->vcpu.cpu == cpu) |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 338 | vmcs_clear(vmx->vmcs); |
| 339 | if (per_cpu(current_vmcs, cpu) == vmx->vmcs) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 340 | per_cpu(current_vmcs, cpu) = NULL; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 341 | rdtscll(vmx->vcpu.arch.host_tsc); |
Avi Kivity | 543e424 | 2008-05-13 16:22:47 +0300 | [diff] [blame] | 342 | list_del(&vmx->local_vcpus_link); |
| 343 | vmx->vcpu.cpu = -1; |
| 344 | vmx->launched = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 345 | } |
| 346 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 347 | static void vcpu_clear(struct vcpu_vmx *vmx) |
Avi Kivity | 8d0be2b | 2007-02-12 00:54:46 -0800 | [diff] [blame] | 348 | { |
Avi Kivity | eae5ecb | 2007-09-30 10:50:12 +0200 | [diff] [blame] | 349 | if (vmx->vcpu.cpu == -1) |
| 350 | return; |
Jens Axboe | 8691e5a | 2008-06-06 11:18:06 +0200 | [diff] [blame] | 351 | smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 1); |
Avi Kivity | 8d0be2b | 2007-02-12 00:54:46 -0800 | [diff] [blame] | 352 | } |
| 353 | |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 354 | static inline void vpid_sync_vcpu_all(struct vcpu_vmx *vmx) |
| 355 | { |
| 356 | if (vmx->vpid == 0) |
| 357 | return; |
| 358 | |
| 359 | __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0); |
| 360 | } |
| 361 | |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 362 | static inline void ept_sync_global(void) |
| 363 | { |
| 364 | if (cpu_has_vmx_invept_global()) |
| 365 | __invept(VMX_EPT_EXTENT_GLOBAL, 0, 0); |
| 366 | } |
| 367 | |
| 368 | static inline void ept_sync_context(u64 eptp) |
| 369 | { |
| 370 | if (vm_need_ept()) { |
| 371 | if (cpu_has_vmx_invept_context()) |
| 372 | __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0); |
| 373 | else |
| 374 | ept_sync_global(); |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | static inline void ept_sync_individual_addr(u64 eptp, gpa_t gpa) |
| 379 | { |
| 380 | if (vm_need_ept()) { |
| 381 | if (cpu_has_vmx_invept_individual_addr()) |
| 382 | __invept(VMX_EPT_EXTENT_INDIVIDUAL_ADDR, |
| 383 | eptp, gpa); |
| 384 | else |
| 385 | ept_sync_context(eptp); |
| 386 | } |
| 387 | } |
| 388 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 389 | static unsigned long vmcs_readl(unsigned long field) |
| 390 | { |
| 391 | unsigned long value; |
| 392 | |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 393 | asm volatile (__ex(ASM_VMX_VMREAD_RDX_RAX) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 394 | : "=a"(value) : "d"(field) : "cc"); |
| 395 | return value; |
| 396 | } |
| 397 | |
| 398 | static u16 vmcs_read16(unsigned long field) |
| 399 | { |
| 400 | return vmcs_readl(field); |
| 401 | } |
| 402 | |
| 403 | static u32 vmcs_read32(unsigned long field) |
| 404 | { |
| 405 | return vmcs_readl(field); |
| 406 | } |
| 407 | |
| 408 | static u64 vmcs_read64(unsigned long field) |
| 409 | { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 410 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 411 | return vmcs_readl(field); |
| 412 | #else |
| 413 | return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32); |
| 414 | #endif |
| 415 | } |
| 416 | |
Avi Kivity | e52de1b | 2007-01-05 16:36:56 -0800 | [diff] [blame] | 417 | static noinline void vmwrite_error(unsigned long field, unsigned long value) |
| 418 | { |
| 419 | printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n", |
| 420 | field, value, vmcs_read32(VM_INSTRUCTION_ERROR)); |
| 421 | dump_stack(); |
| 422 | } |
| 423 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 424 | static void vmcs_writel(unsigned long field, unsigned long value) |
| 425 | { |
| 426 | u8 error; |
| 427 | |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 428 | asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0" |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 429 | : "=q"(error) : "a"(value), "d"(field) : "cc"); |
Avi Kivity | e52de1b | 2007-01-05 16:36:56 -0800 | [diff] [blame] | 430 | if (unlikely(error)) |
| 431 | vmwrite_error(field, value); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 432 | } |
| 433 | |
| 434 | static void vmcs_write16(unsigned long field, u16 value) |
| 435 | { |
| 436 | vmcs_writel(field, value); |
| 437 | } |
| 438 | |
| 439 | static void vmcs_write32(unsigned long field, u32 value) |
| 440 | { |
| 441 | vmcs_writel(field, value); |
| 442 | } |
| 443 | |
| 444 | static void vmcs_write64(unsigned long field, u64 value) |
| 445 | { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 446 | vmcs_writel(field, value); |
Avi Kivity | 7682f2d | 2008-05-12 19:25:43 +0300 | [diff] [blame] | 447 | #ifndef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 448 | asm volatile (""); |
| 449 | vmcs_writel(field+1, value >> 32); |
| 450 | #endif |
| 451 | } |
| 452 | |
Anthony Liguori | 2ab455c | 2007-04-27 09:29:49 +0300 | [diff] [blame] | 453 | static void vmcs_clear_bits(unsigned long field, u32 mask) |
| 454 | { |
| 455 | vmcs_writel(field, vmcs_readl(field) & ~mask); |
| 456 | } |
| 457 | |
| 458 | static void vmcs_set_bits(unsigned long field, u32 mask) |
| 459 | { |
| 460 | vmcs_writel(field, vmcs_readl(field) | mask); |
| 461 | } |
| 462 | |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 463 | static void update_exception_bitmap(struct kvm_vcpu *vcpu) |
| 464 | { |
| 465 | u32 eb; |
| 466 | |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 467 | eb = (1u << PF_VECTOR) | (1u << UD_VECTOR); |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 468 | if (!vcpu->fpu_active) |
| 469 | eb |= 1u << NM_VECTOR; |
| 470 | if (vcpu->guest_debug.enabled) |
| 471 | eb |= 1u << 1; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 472 | if (vcpu->arch.rmode.active) |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 473 | eb = ~0; |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 474 | if (vm_need_ept()) |
| 475 | eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */ |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 476 | vmcs_write32(EXCEPTION_BITMAP, eb); |
| 477 | } |
| 478 | |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 479 | static void reload_tss(void) |
| 480 | { |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 481 | /* |
| 482 | * VT restores TR but not its size. Useless. |
| 483 | */ |
| 484 | struct descriptor_table gdt; |
Avi Kivity | a5f6130 | 2008-02-20 17:57:21 +0200 | [diff] [blame] | 485 | struct desc_struct *descs; |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 486 | |
Avi Kivity | d6e88ae | 2008-07-10 16:53:33 +0300 | [diff] [blame] | 487 | kvm_get_gdt(&gdt); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 488 | descs = (void *)gdt.base; |
| 489 | descs[GDT_ENTRY_TSS].type = 9; /* available TSS */ |
| 490 | load_TR_desc(); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 491 | } |
| 492 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 493 | static void load_transition_efer(struct vcpu_vmx *vmx) |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 494 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 495 | int efer_offset = vmx->msr_offset_efer; |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 496 | u64 host_efer = vmx->host_msrs[efer_offset].data; |
| 497 | u64 guest_efer = vmx->guest_msrs[efer_offset].data; |
| 498 | u64 ignore_bits; |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 499 | |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 500 | if (efer_offset < 0) |
| 501 | return; |
| 502 | /* |
| 503 | * NX is emulated; LMA and LME handled by hardware; SCE meaninless |
| 504 | * outside long mode |
| 505 | */ |
| 506 | ignore_bits = EFER_NX | EFER_SCE; |
| 507 | #ifdef CONFIG_X86_64 |
| 508 | ignore_bits |= EFER_LMA | EFER_LME; |
| 509 | /* SCE is meaningful only in long mode on Intel */ |
| 510 | if (guest_efer & EFER_LMA) |
| 511 | ignore_bits &= ~(u64)EFER_SCE; |
| 512 | #endif |
| 513 | if ((guest_efer & ~ignore_bits) == (host_efer & ~ignore_bits)) |
| 514 | return; |
| 515 | |
| 516 | vmx->host_state.guest_efer_loaded = 1; |
| 517 | guest_efer &= ~ignore_bits; |
| 518 | guest_efer |= host_efer & ignore_bits; |
| 519 | wrmsrl(MSR_EFER, guest_efer); |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 520 | vmx->vcpu.stat.efer_reload++; |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 521 | } |
| 522 | |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 523 | static void reload_host_efer(struct vcpu_vmx *vmx) |
| 524 | { |
| 525 | if (vmx->host_state.guest_efer_loaded) { |
| 526 | vmx->host_state.guest_efer_loaded = 0; |
| 527 | load_msrs(vmx->host_msrs + vmx->msr_offset_efer, 1); |
| 528 | } |
| 529 | } |
| 530 | |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 531 | static void vmx_save_host_state(struct kvm_vcpu *vcpu) |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 532 | { |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 533 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 534 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 535 | if (vmx->host_state.loaded) |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 536 | return; |
| 537 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 538 | vmx->host_state.loaded = 1; |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 539 | /* |
| 540 | * Set host fs and gs selectors. Unfortunately, 22.2.3 does not |
| 541 | * allow segment selectors with cpl > 0 or ti == 1. |
| 542 | */ |
Avi Kivity | d6e88ae | 2008-07-10 16:53:33 +0300 | [diff] [blame] | 543 | vmx->host_state.ldt_sel = kvm_read_ldt(); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 544 | vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel; |
Avi Kivity | d6e88ae | 2008-07-10 16:53:33 +0300 | [diff] [blame] | 545 | vmx->host_state.fs_sel = kvm_read_fs(); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 546 | if (!(vmx->host_state.fs_sel & 7)) { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 547 | vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 548 | vmx->host_state.fs_reload_needed = 0; |
| 549 | } else { |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 550 | vmcs_write16(HOST_FS_SELECTOR, 0); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 551 | vmx->host_state.fs_reload_needed = 1; |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 552 | } |
Avi Kivity | d6e88ae | 2008-07-10 16:53:33 +0300 | [diff] [blame] | 553 | vmx->host_state.gs_sel = kvm_read_gs(); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 554 | if (!(vmx->host_state.gs_sel & 7)) |
| 555 | vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 556 | else { |
| 557 | vmcs_write16(HOST_GS_SELECTOR, 0); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 558 | vmx->host_state.gs_ldt_reload_needed = 1; |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 559 | } |
| 560 | |
| 561 | #ifdef CONFIG_X86_64 |
| 562 | vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE)); |
| 563 | vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE)); |
| 564 | #else |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 565 | vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel)); |
| 566 | vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel)); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 567 | #endif |
Avi Kivity | 707c087 | 2007-05-02 17:33:43 +0300 | [diff] [blame] | 568 | |
| 569 | #ifdef CONFIG_X86_64 |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 570 | if (is_long_mode(&vmx->vcpu)) |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 571 | save_msrs(vmx->host_msrs + |
| 572 | vmx->msr_offset_kernel_gs_base, 1); |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 573 | |
Avi Kivity | 707c087 | 2007-05-02 17:33:43 +0300 | [diff] [blame] | 574 | #endif |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 575 | load_msrs(vmx->guest_msrs, vmx->save_nmsrs); |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 576 | load_transition_efer(vmx); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 577 | } |
| 578 | |
Avi Kivity | a9b21b6 | 2008-06-24 11:48:49 +0300 | [diff] [blame] | 579 | static void __vmx_load_host_state(struct vcpu_vmx *vmx) |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 580 | { |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 581 | unsigned long flags; |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 582 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 583 | if (!vmx->host_state.loaded) |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 584 | return; |
| 585 | |
Avi Kivity | e1beb1d | 2007-11-18 13:50:24 +0200 | [diff] [blame] | 586 | ++vmx->vcpu.stat.host_state_reload; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 587 | vmx->host_state.loaded = 0; |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 588 | if (vmx->host_state.fs_reload_needed) |
Avi Kivity | d6e88ae | 2008-07-10 16:53:33 +0300 | [diff] [blame] | 589 | kvm_load_fs(vmx->host_state.fs_sel); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 590 | if (vmx->host_state.gs_ldt_reload_needed) { |
Avi Kivity | d6e88ae | 2008-07-10 16:53:33 +0300 | [diff] [blame] | 591 | kvm_load_ldt(vmx->host_state.ldt_sel); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 592 | /* |
| 593 | * If we have to reload gs, we must take care to |
| 594 | * preserve our gs base. |
| 595 | */ |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 596 | local_irq_save(flags); |
Avi Kivity | d6e88ae | 2008-07-10 16:53:33 +0300 | [diff] [blame] | 597 | kvm_load_gs(vmx->host_state.gs_sel); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 598 | #ifdef CONFIG_X86_64 |
| 599 | wrmsrl(MSR_GS_BASE, vmcs_readl(HOST_GS_BASE)); |
| 600 | #endif |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 601 | local_irq_restore(flags); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 602 | } |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 603 | reload_tss(); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 604 | save_msrs(vmx->guest_msrs, vmx->save_nmsrs); |
| 605 | load_msrs(vmx->host_msrs, vmx->save_nmsrs); |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 606 | reload_host_efer(vmx); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 607 | } |
| 608 | |
Avi Kivity | a9b21b6 | 2008-06-24 11:48:49 +0300 | [diff] [blame] | 609 | static void vmx_load_host_state(struct vcpu_vmx *vmx) |
| 610 | { |
| 611 | preempt_disable(); |
| 612 | __vmx_load_host_state(vmx); |
| 613 | preempt_enable(); |
| 614 | } |
| 615 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 616 | /* |
| 617 | * Switches to specified vcpu, until a matching vcpu_put(), but assumes |
| 618 | * vcpu mutex is already taken. |
| 619 | */ |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 620 | static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 621 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 622 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 623 | u64 phys_addr = __pa(vmx->vmcs); |
Avi Kivity | 019960a | 2008-03-04 10:44:51 +0200 | [diff] [blame] | 624 | u64 tsc_this, delta, new_offset; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 625 | |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 626 | if (vcpu->cpu != cpu) { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 627 | vcpu_clear(vmx); |
Marcelo Tosatti | 2f59971 | 2008-05-27 12:10:20 -0300 | [diff] [blame] | 628 | kvm_migrate_timers(vcpu); |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 629 | vpid_sync_vcpu_all(vmx); |
Avi Kivity | 543e424 | 2008-05-13 16:22:47 +0300 | [diff] [blame] | 630 | local_irq_disable(); |
| 631 | list_add(&vmx->local_vcpus_link, |
| 632 | &per_cpu(vcpus_on_cpu, cpu)); |
| 633 | local_irq_enable(); |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 634 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 635 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 636 | if (per_cpu(current_vmcs, cpu) != vmx->vmcs) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 637 | u8 error; |
| 638 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 639 | per_cpu(current_vmcs, cpu) = vmx->vmcs; |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 640 | asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 641 | : "=g"(error) : "a"(&phys_addr), "m"(phys_addr) |
| 642 | : "cc"); |
| 643 | if (error) |
| 644 | printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n", |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 645 | vmx->vmcs, phys_addr); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 646 | } |
| 647 | |
| 648 | if (vcpu->cpu != cpu) { |
| 649 | struct descriptor_table dt; |
| 650 | unsigned long sysenter_esp; |
| 651 | |
| 652 | vcpu->cpu = cpu; |
| 653 | /* |
| 654 | * Linux uses per-cpu TSS and GDT, so set these when switching |
| 655 | * processors. |
| 656 | */ |
Avi Kivity | d6e88ae | 2008-07-10 16:53:33 +0300 | [diff] [blame] | 657 | vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */ |
| 658 | kvm_get_gdt(&dt); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 659 | vmcs_writel(HOST_GDTR_BASE, dt.base); /* 22.2.4 */ |
| 660 | |
| 661 | rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp); |
| 662 | vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */ |
Avi Kivity | 7700270 | 2007-06-13 19:55:28 +0300 | [diff] [blame] | 663 | |
| 664 | /* |
| 665 | * Make sure the time stamp counter is monotonous. |
| 666 | */ |
| 667 | rdtscll(tsc_this); |
Avi Kivity | 019960a | 2008-03-04 10:44:51 +0200 | [diff] [blame] | 668 | if (tsc_this < vcpu->arch.host_tsc) { |
| 669 | delta = vcpu->arch.host_tsc - tsc_this; |
| 670 | new_offset = vmcs_read64(TSC_OFFSET) + delta; |
| 671 | vmcs_write64(TSC_OFFSET, new_offset); |
| 672 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 673 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 674 | } |
| 675 | |
| 676 | static void vmx_vcpu_put(struct kvm_vcpu *vcpu) |
| 677 | { |
Avi Kivity | a9b21b6 | 2008-06-24 11:48:49 +0300 | [diff] [blame] | 678 | __vmx_load_host_state(to_vmx(vcpu)); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 679 | } |
| 680 | |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 681 | static void vmx_fpu_activate(struct kvm_vcpu *vcpu) |
| 682 | { |
| 683 | if (vcpu->fpu_active) |
| 684 | return; |
| 685 | vcpu->fpu_active = 1; |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 686 | vmcs_clear_bits(GUEST_CR0, X86_CR0_TS); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 687 | if (vcpu->arch.cr0 & X86_CR0_TS) |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 688 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS); |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 689 | update_exception_bitmap(vcpu); |
| 690 | } |
| 691 | |
| 692 | static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu) |
| 693 | { |
| 694 | if (!vcpu->fpu_active) |
| 695 | return; |
| 696 | vcpu->fpu_active = 0; |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 697 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS); |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 698 | update_exception_bitmap(vcpu); |
| 699 | } |
| 700 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 701 | static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu) |
| 702 | { |
| 703 | return vmcs_readl(GUEST_RFLAGS); |
| 704 | } |
| 705 | |
| 706 | static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) |
| 707 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 708 | if (vcpu->arch.rmode.active) |
Glauber de Oliveira Costa | 053de04 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 709 | rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 710 | vmcs_writel(GUEST_RFLAGS, rflags); |
| 711 | } |
| 712 | |
| 713 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) |
| 714 | { |
| 715 | unsigned long rip; |
| 716 | u32 interruptibility; |
| 717 | |
| 718 | rip = vmcs_readl(GUEST_RIP); |
| 719 | rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN); |
| 720 | vmcs_writel(GUEST_RIP, rip); |
| 721 | |
| 722 | /* |
| 723 | * We emulated an instruction, so temporary interrupt blocking |
| 724 | * should be removed, if set. |
| 725 | */ |
| 726 | interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); |
| 727 | if (interruptibility & 3) |
| 728 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, |
| 729 | interruptibility & ~3); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 730 | vcpu->arch.interrupt_window_open = 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 731 | } |
| 732 | |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 733 | static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr, |
| 734 | bool has_error_code, u32 error_code) |
| 735 | { |
| 736 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
| 737 | nr | INTR_TYPE_EXCEPTION |
Ryan Harper | 2e11384 | 2008-02-11 10:26:38 -0600 | [diff] [blame] | 738 | | (has_error_code ? INTR_INFO_DELIVER_CODE_MASK : 0) |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 739 | | INTR_INFO_VALID_MASK); |
| 740 | if (has_error_code) |
| 741 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code); |
| 742 | } |
| 743 | |
| 744 | static bool vmx_exception_injected(struct kvm_vcpu *vcpu) |
| 745 | { |
| 746 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 747 | |
| 748 | return !(vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK); |
| 749 | } |
| 750 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 751 | /* |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 752 | * Swap MSR entry in host/guest MSR entry array. |
| 753 | */ |
Gabriel C | 54e11fa | 2007-08-01 16:23:10 +0200 | [diff] [blame] | 754 | #ifdef CONFIG_X86_64 |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 755 | static void move_msr_up(struct vcpu_vmx *vmx, int from, int to) |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 756 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 757 | struct kvm_msr_entry tmp; |
| 758 | |
| 759 | tmp = vmx->guest_msrs[to]; |
| 760 | vmx->guest_msrs[to] = vmx->guest_msrs[from]; |
| 761 | vmx->guest_msrs[from] = tmp; |
| 762 | tmp = vmx->host_msrs[to]; |
| 763 | vmx->host_msrs[to] = vmx->host_msrs[from]; |
| 764 | vmx->host_msrs[from] = tmp; |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 765 | } |
Gabriel C | 54e11fa | 2007-08-01 16:23:10 +0200 | [diff] [blame] | 766 | #endif |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 767 | |
| 768 | /* |
Avi Kivity | e38aea3 | 2007-04-19 13:22:48 +0300 | [diff] [blame] | 769 | * Set up the vmcs to automatically save and restore system |
| 770 | * msrs. Don't touch the 64-bit msrs if the guest is in legacy |
| 771 | * mode, as fiddling with msrs is very expensive. |
| 772 | */ |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 773 | static void setup_msrs(struct vcpu_vmx *vmx) |
Avi Kivity | e38aea3 | 2007-04-19 13:22:48 +0300 | [diff] [blame] | 774 | { |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 775 | int save_nmsrs; |
Avi Kivity | e38aea3 | 2007-04-19 13:22:48 +0300 | [diff] [blame] | 776 | |
Avi Kivity | 33f9c50 | 2008-02-27 16:06:57 +0200 | [diff] [blame] | 777 | vmx_load_host_state(vmx); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 778 | save_nmsrs = 0; |
Avi Kivity | 4d56c8a | 2007-04-19 14:28:44 +0300 | [diff] [blame] | 779 | #ifdef CONFIG_X86_64 |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 780 | if (is_long_mode(&vmx->vcpu)) { |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 781 | int index; |
| 782 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 783 | index = __find_msr_index(vmx, MSR_SYSCALL_MASK); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 784 | if (index >= 0) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 785 | move_msr_up(vmx, index, save_nmsrs++); |
| 786 | index = __find_msr_index(vmx, MSR_LSTAR); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 787 | if (index >= 0) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 788 | move_msr_up(vmx, index, save_nmsrs++); |
| 789 | index = __find_msr_index(vmx, MSR_CSTAR); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 790 | if (index >= 0) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 791 | move_msr_up(vmx, index, save_nmsrs++); |
| 792 | index = __find_msr_index(vmx, MSR_KERNEL_GS_BASE); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 793 | if (index >= 0) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 794 | move_msr_up(vmx, index, save_nmsrs++); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 795 | /* |
| 796 | * MSR_K6_STAR is only needed on long mode guests, and only |
| 797 | * if efer.sce is enabled. |
| 798 | */ |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 799 | index = __find_msr_index(vmx, MSR_K6_STAR); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 800 | if ((index >= 0) && (vmx->vcpu.arch.shadow_efer & EFER_SCE)) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 801 | move_msr_up(vmx, index, save_nmsrs++); |
Avi Kivity | 4d56c8a | 2007-04-19 14:28:44 +0300 | [diff] [blame] | 802 | } |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 803 | #endif |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 804 | vmx->save_nmsrs = save_nmsrs; |
Avi Kivity | 4d56c8a | 2007-04-19 14:28:44 +0300 | [diff] [blame] | 805 | |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 806 | #ifdef CONFIG_X86_64 |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 807 | vmx->msr_offset_kernel_gs_base = |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 808 | __find_msr_index(vmx, MSR_KERNEL_GS_BASE); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 809 | #endif |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 810 | vmx->msr_offset_efer = __find_msr_index(vmx, MSR_EFER); |
Avi Kivity | e38aea3 | 2007-04-19 13:22:48 +0300 | [diff] [blame] | 811 | } |
| 812 | |
| 813 | /* |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 814 | * reads and returns guest's timestamp counter "register" |
| 815 | * guest_tsc = host_tsc + tsc_offset -- 21.3 |
| 816 | */ |
| 817 | static u64 guest_read_tsc(void) |
| 818 | { |
| 819 | u64 host_tsc, tsc_offset; |
| 820 | |
| 821 | rdtscll(host_tsc); |
| 822 | tsc_offset = vmcs_read64(TSC_OFFSET); |
| 823 | return host_tsc + tsc_offset; |
| 824 | } |
| 825 | |
| 826 | /* |
| 827 | * writes 'guest_tsc' into guest's timestamp counter "register" |
| 828 | * guest_tsc = host_tsc + tsc_offset ==> tsc_offset = guest_tsc - host_tsc |
| 829 | */ |
| 830 | static void guest_write_tsc(u64 guest_tsc) |
| 831 | { |
| 832 | u64 host_tsc; |
| 833 | |
| 834 | rdtscll(host_tsc); |
| 835 | vmcs_write64(TSC_OFFSET, guest_tsc - host_tsc); |
| 836 | } |
| 837 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 838 | /* |
| 839 | * Reads an msr value (of 'msr_index') into 'pdata'. |
| 840 | * Returns 0 on success, non-0 otherwise. |
| 841 | * Assumes vcpu_load() was already called. |
| 842 | */ |
| 843 | static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) |
| 844 | { |
| 845 | u64 data; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 846 | struct kvm_msr_entry *msr; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 847 | |
| 848 | if (!pdata) { |
| 849 | printk(KERN_ERR "BUG: get_msr called with NULL pdata\n"); |
| 850 | return -EINVAL; |
| 851 | } |
| 852 | |
| 853 | switch (msr_index) { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 854 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 855 | case MSR_FS_BASE: |
| 856 | data = vmcs_readl(GUEST_FS_BASE); |
| 857 | break; |
| 858 | case MSR_GS_BASE: |
| 859 | data = vmcs_readl(GUEST_GS_BASE); |
| 860 | break; |
| 861 | case MSR_EFER: |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 862 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 863 | #endif |
| 864 | case MSR_IA32_TIME_STAMP_COUNTER: |
| 865 | data = guest_read_tsc(); |
| 866 | break; |
| 867 | case MSR_IA32_SYSENTER_CS: |
| 868 | data = vmcs_read32(GUEST_SYSENTER_CS); |
| 869 | break; |
| 870 | case MSR_IA32_SYSENTER_EIP: |
Avi Kivity | f5b42c3 | 2007-03-06 12:05:53 +0200 | [diff] [blame] | 871 | data = vmcs_readl(GUEST_SYSENTER_EIP); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 872 | break; |
| 873 | case MSR_IA32_SYSENTER_ESP: |
Avi Kivity | f5b42c3 | 2007-03-06 12:05:53 +0200 | [diff] [blame] | 874 | data = vmcs_readl(GUEST_SYSENTER_ESP); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 875 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 876 | default: |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 877 | msr = find_msr_entry(to_vmx(vcpu), msr_index); |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 878 | if (msr) { |
| 879 | data = msr->data; |
| 880 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 881 | } |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 882 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 883 | } |
| 884 | |
| 885 | *pdata = data; |
| 886 | return 0; |
| 887 | } |
| 888 | |
| 889 | /* |
| 890 | * Writes msr value into into the appropriate "register". |
| 891 | * Returns 0 on success, non-0 otherwise. |
| 892 | * Assumes vcpu_load() was already called. |
| 893 | */ |
| 894 | static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) |
| 895 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 896 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 897 | struct kvm_msr_entry *msr; |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 898 | int ret = 0; |
| 899 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 900 | switch (msr_index) { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 901 | #ifdef CONFIG_X86_64 |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 902 | case MSR_EFER: |
Avi Kivity | a9b21b6 | 2008-06-24 11:48:49 +0300 | [diff] [blame] | 903 | vmx_load_host_state(vmx); |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 904 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 905 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 906 | case MSR_FS_BASE: |
| 907 | vmcs_writel(GUEST_FS_BASE, data); |
| 908 | break; |
| 909 | case MSR_GS_BASE: |
| 910 | vmcs_writel(GUEST_GS_BASE, data); |
| 911 | break; |
| 912 | #endif |
| 913 | case MSR_IA32_SYSENTER_CS: |
| 914 | vmcs_write32(GUEST_SYSENTER_CS, data); |
| 915 | break; |
| 916 | case MSR_IA32_SYSENTER_EIP: |
Avi Kivity | f5b42c3 | 2007-03-06 12:05:53 +0200 | [diff] [blame] | 917 | vmcs_writel(GUEST_SYSENTER_EIP, data); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 918 | break; |
| 919 | case MSR_IA32_SYSENTER_ESP: |
Avi Kivity | f5b42c3 | 2007-03-06 12:05:53 +0200 | [diff] [blame] | 920 | vmcs_writel(GUEST_SYSENTER_ESP, data); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 921 | break; |
Avi Kivity | d27d4ac | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 922 | case MSR_IA32_TIME_STAMP_COUNTER: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 923 | guest_write_tsc(data); |
| 924 | break; |
Chris Lalancette | efa67e0 | 2008-06-20 09:51:30 +0200 | [diff] [blame] | 925 | case MSR_P6_PERFCTR0: |
| 926 | case MSR_P6_PERFCTR1: |
| 927 | case MSR_P6_EVNTSEL0: |
| 928 | case MSR_P6_EVNTSEL1: |
| 929 | /* |
| 930 | * Just discard all writes to the performance counters; this |
| 931 | * should keep both older linux and windows 64-bit guests |
| 932 | * happy |
| 933 | */ |
| 934 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: 0x%x data 0x%llx\n", msr_index, data); |
| 935 | |
| 936 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 937 | default: |
Avi Kivity | a9b21b6 | 2008-06-24 11:48:49 +0300 | [diff] [blame] | 938 | vmx_load_host_state(vmx); |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 939 | msr = find_msr_entry(vmx, msr_index); |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 940 | if (msr) { |
| 941 | msr->data = data; |
| 942 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 943 | } |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 944 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 945 | } |
| 946 | |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 947 | return ret; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 948 | } |
| 949 | |
| 950 | /* |
| 951 | * Sync the rsp and rip registers into the vcpu structure. This allows |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 952 | * registers to be accessed by indexing vcpu->arch.regs. |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 953 | */ |
| 954 | static void vcpu_load_rsp_rip(struct kvm_vcpu *vcpu) |
| 955 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 956 | vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP); |
| 957 | vcpu->arch.rip = vmcs_readl(GUEST_RIP); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 958 | } |
| 959 | |
| 960 | /* |
| 961 | * Syncs rsp and rip back into the vmcs. Should be called after possible |
| 962 | * modification. |
| 963 | */ |
| 964 | static void vcpu_put_rsp_rip(struct kvm_vcpu *vcpu) |
| 965 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 966 | vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]); |
| 967 | vmcs_writel(GUEST_RIP, vcpu->arch.rip); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 968 | } |
| 969 | |
| 970 | static int set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg) |
| 971 | { |
| 972 | unsigned long dr7 = 0x400; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 973 | int old_singlestep; |
| 974 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 975 | old_singlestep = vcpu->guest_debug.singlestep; |
| 976 | |
| 977 | vcpu->guest_debug.enabled = dbg->enabled; |
| 978 | if (vcpu->guest_debug.enabled) { |
| 979 | int i; |
| 980 | |
| 981 | dr7 |= 0x200; /* exact */ |
| 982 | for (i = 0; i < 4; ++i) { |
| 983 | if (!dbg->breakpoints[i].enabled) |
| 984 | continue; |
| 985 | vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address; |
| 986 | dr7 |= 2 << (i*2); /* global enable */ |
| 987 | dr7 |= 0 << (i*4+16); /* execution breakpoint */ |
| 988 | } |
| 989 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 990 | vcpu->guest_debug.singlestep = dbg->singlestep; |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 991 | } else |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 992 | vcpu->guest_debug.singlestep = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 993 | |
| 994 | if (old_singlestep && !vcpu->guest_debug.singlestep) { |
| 995 | unsigned long flags; |
| 996 | |
| 997 | flags = vmcs_readl(GUEST_RFLAGS); |
| 998 | flags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); |
| 999 | vmcs_writel(GUEST_RFLAGS, flags); |
| 1000 | } |
| 1001 | |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 1002 | update_exception_bitmap(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1003 | vmcs_writel(GUEST_DR7, dr7); |
| 1004 | |
| 1005 | return 0; |
| 1006 | } |
| 1007 | |
Eddie Dong | 2a8067f | 2007-08-06 16:29:07 +0300 | [diff] [blame] | 1008 | static int vmx_get_irq(struct kvm_vcpu *vcpu) |
| 1009 | { |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 1010 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
Eddie Dong | 2a8067f | 2007-08-06 16:29:07 +0300 | [diff] [blame] | 1011 | u32 idtv_info_field; |
| 1012 | |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 1013 | idtv_info_field = vmx->idt_vectoring_info; |
Eddie Dong | 2a8067f | 2007-08-06 16:29:07 +0300 | [diff] [blame] | 1014 | if (idtv_info_field & INTR_INFO_VALID_MASK) { |
| 1015 | if (is_external_interrupt(idtv_info_field)) |
| 1016 | return idtv_info_field & VECTORING_INFO_VECTOR_MASK; |
| 1017 | else |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 1018 | printk(KERN_DEBUG "pending exception: not handled yet\n"); |
Eddie Dong | 2a8067f | 2007-08-06 16:29:07 +0300 | [diff] [blame] | 1019 | } |
| 1020 | return -1; |
| 1021 | } |
| 1022 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1023 | static __init int cpu_has_kvm_support(void) |
| 1024 | { |
| 1025 | unsigned long ecx = cpuid_ecx(1); |
| 1026 | return test_bit(5, &ecx); /* CPUID.1:ECX.VMX[bit 5] -> VT */ |
| 1027 | } |
| 1028 | |
| 1029 | static __init int vmx_disabled_by_bios(void) |
| 1030 | { |
| 1031 | u64 msr; |
| 1032 | |
| 1033 | rdmsrl(MSR_IA32_FEATURE_CONTROL, msr); |
Sheng Yang | ca60dfb | 2008-06-24 17:02:38 +0800 | [diff] [blame^] | 1034 | return (msr & (IA32_FEATURE_CONTROL_LOCKED_BIT | |
| 1035 | IA32_FEATURE_CONTROL_VMXON_ENABLED_BIT)) |
| 1036 | == IA32_FEATURE_CONTROL_LOCKED_BIT; |
Yang, Sheng | 62b3ffb | 2007-07-25 12:17:06 +0300 | [diff] [blame] | 1037 | /* locked but not enabled */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1038 | } |
| 1039 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 1040 | static void hardware_enable(void *garbage) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1041 | { |
| 1042 | int cpu = raw_smp_processor_id(); |
| 1043 | u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); |
| 1044 | u64 old; |
| 1045 | |
Avi Kivity | 543e424 | 2008-05-13 16:22:47 +0300 | [diff] [blame] | 1046 | INIT_LIST_HEAD(&per_cpu(vcpus_on_cpu, cpu)); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1047 | rdmsrl(MSR_IA32_FEATURE_CONTROL, old); |
Sheng Yang | ca60dfb | 2008-06-24 17:02:38 +0800 | [diff] [blame^] | 1048 | if ((old & (IA32_FEATURE_CONTROL_LOCKED_BIT | |
| 1049 | IA32_FEATURE_CONTROL_VMXON_ENABLED_BIT)) |
| 1050 | != (IA32_FEATURE_CONTROL_LOCKED_BIT | |
| 1051 | IA32_FEATURE_CONTROL_VMXON_ENABLED_BIT)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1052 | /* enable and lock */ |
Yang, Sheng | 62b3ffb | 2007-07-25 12:17:06 +0300 | [diff] [blame] | 1053 | wrmsrl(MSR_IA32_FEATURE_CONTROL, old | |
Sheng Yang | ca60dfb | 2008-06-24 17:02:38 +0800 | [diff] [blame^] | 1054 | IA32_FEATURE_CONTROL_LOCKED_BIT | |
| 1055 | IA32_FEATURE_CONTROL_VMXON_ENABLED_BIT); |
Rusty Russell | 66aee91 | 2007-07-17 23:34:16 +1000 | [diff] [blame] | 1056 | write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */ |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 1057 | asm volatile (ASM_VMX_VMXON_RAX |
| 1058 | : : "a"(&phys_addr), "m"(phys_addr) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1059 | : "memory", "cc"); |
| 1060 | } |
| 1061 | |
Avi Kivity | 543e424 | 2008-05-13 16:22:47 +0300 | [diff] [blame] | 1062 | static void vmclear_local_vcpus(void) |
| 1063 | { |
| 1064 | int cpu = raw_smp_processor_id(); |
| 1065 | struct vcpu_vmx *vmx, *n; |
| 1066 | |
| 1067 | list_for_each_entry_safe(vmx, n, &per_cpu(vcpus_on_cpu, cpu), |
| 1068 | local_vcpus_link) |
| 1069 | __vcpu_clear(vmx); |
| 1070 | } |
| 1071 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1072 | static void hardware_disable(void *garbage) |
| 1073 | { |
Avi Kivity | 543e424 | 2008-05-13 16:22:47 +0300 | [diff] [blame] | 1074 | vmclear_local_vcpus(); |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 1075 | asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc"); |
Eli Collins | e693d71 | 2008-06-01 20:24:40 -0700 | [diff] [blame] | 1076 | write_cr4(read_cr4() & ~X86_CR4_VMXE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1077 | } |
| 1078 | |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1079 | static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt, |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 1080 | u32 msr, u32 *result) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1081 | { |
| 1082 | u32 vmx_msr_low, vmx_msr_high; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1083 | u32 ctl = ctl_min | ctl_opt; |
| 1084 | |
| 1085 | rdmsr(msr, vmx_msr_low, vmx_msr_high); |
| 1086 | |
| 1087 | ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */ |
| 1088 | ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */ |
| 1089 | |
| 1090 | /* Ensure minimum (required) set of control bits are supported. */ |
| 1091 | if (ctl_min & ~ctl) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1092 | return -EIO; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1093 | |
| 1094 | *result = ctl; |
| 1095 | return 0; |
| 1096 | } |
| 1097 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1098 | static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1099 | { |
| 1100 | u32 vmx_msr_low, vmx_msr_high; |
Sheng Yang | d56f546 | 2008-04-25 10:13:16 +0800 | [diff] [blame] | 1101 | u32 min, opt, min2, opt2; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1102 | u32 _pin_based_exec_control = 0; |
| 1103 | u32 _cpu_based_exec_control = 0; |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1104 | u32 _cpu_based_2nd_exec_control = 0; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1105 | u32 _vmexit_control = 0; |
| 1106 | u32 _vmentry_control = 0; |
| 1107 | |
| 1108 | min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING; |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 1109 | opt = PIN_BASED_VIRTUAL_NMIS; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1110 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS, |
| 1111 | &_pin_based_exec_control) < 0) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1112 | return -EIO; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1113 | |
| 1114 | min = CPU_BASED_HLT_EXITING | |
| 1115 | #ifdef CONFIG_X86_64 |
| 1116 | CPU_BASED_CR8_LOAD_EXITING | |
| 1117 | CPU_BASED_CR8_STORE_EXITING | |
| 1118 | #endif |
Sheng Yang | d56f546 | 2008-04-25 10:13:16 +0800 | [diff] [blame] | 1119 | CPU_BASED_CR3_LOAD_EXITING | |
| 1120 | CPU_BASED_CR3_STORE_EXITING | |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1121 | CPU_BASED_USE_IO_BITMAPS | |
| 1122 | CPU_BASED_MOV_DR_EXITING | |
| 1123 | CPU_BASED_USE_TSC_OFFSETING; |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1124 | opt = CPU_BASED_TPR_SHADOW | |
Sheng Yang | 25c5f22 | 2008-03-28 13:18:56 +0800 | [diff] [blame] | 1125 | CPU_BASED_USE_MSR_BITMAPS | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1126 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1127 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS, |
| 1128 | &_cpu_based_exec_control) < 0) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1129 | return -EIO; |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 1130 | #ifdef CONFIG_X86_64 |
| 1131 | if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)) |
| 1132 | _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING & |
| 1133 | ~CPU_BASED_CR8_STORE_EXITING; |
| 1134 | #endif |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1135 | if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) { |
Sheng Yang | d56f546 | 2008-04-25 10:13:16 +0800 | [diff] [blame] | 1136 | min2 = 0; |
| 1137 | opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 1138 | SECONDARY_EXEC_WBINVD_EXITING | |
Sheng Yang | d56f546 | 2008-04-25 10:13:16 +0800 | [diff] [blame] | 1139 | SECONDARY_EXEC_ENABLE_VPID | |
| 1140 | SECONDARY_EXEC_ENABLE_EPT; |
| 1141 | if (adjust_vmx_controls(min2, opt2, |
| 1142 | MSR_IA32_VMX_PROCBASED_CTLS2, |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1143 | &_cpu_based_2nd_exec_control) < 0) |
| 1144 | return -EIO; |
| 1145 | } |
| 1146 | #ifndef CONFIG_X86_64 |
| 1147 | if (!(_cpu_based_2nd_exec_control & |
| 1148 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) |
| 1149 | _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW; |
| 1150 | #endif |
Sheng Yang | d56f546 | 2008-04-25 10:13:16 +0800 | [diff] [blame] | 1151 | if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) { |
| 1152 | /* CR3 accesses don't need to cause VM Exits when EPT enabled */ |
| 1153 | min &= ~(CPU_BASED_CR3_LOAD_EXITING | |
| 1154 | CPU_BASED_CR3_STORE_EXITING); |
| 1155 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS, |
| 1156 | &_cpu_based_exec_control) < 0) |
| 1157 | return -EIO; |
| 1158 | rdmsr(MSR_IA32_VMX_EPT_VPID_CAP, |
| 1159 | vmx_capability.ept, vmx_capability.vpid); |
| 1160 | } |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1161 | |
| 1162 | min = 0; |
| 1163 | #ifdef CONFIG_X86_64 |
| 1164 | min |= VM_EXIT_HOST_ADDR_SPACE_SIZE; |
| 1165 | #endif |
| 1166 | opt = 0; |
| 1167 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS, |
| 1168 | &_vmexit_control) < 0) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1169 | return -EIO; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1170 | |
| 1171 | min = opt = 0; |
| 1172 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS, |
| 1173 | &_vmentry_control) < 0) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1174 | return -EIO; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1175 | |
Nguyen Anh Quynh | c68876f | 2006-12-29 16:49:54 -0800 | [diff] [blame] | 1176 | rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high); |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1177 | |
| 1178 | /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */ |
| 1179 | if ((vmx_msr_high & 0x1fff) > PAGE_SIZE) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1180 | return -EIO; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1181 | |
| 1182 | #ifdef CONFIG_X86_64 |
| 1183 | /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */ |
| 1184 | if (vmx_msr_high & (1u<<16)) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1185 | return -EIO; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1186 | #endif |
| 1187 | |
| 1188 | /* Require Write-Back (WB) memory type for VMCS accesses. */ |
| 1189 | if (((vmx_msr_high >> 18) & 15) != 6) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1190 | return -EIO; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1191 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1192 | vmcs_conf->size = vmx_msr_high & 0x1fff; |
| 1193 | vmcs_conf->order = get_order(vmcs_config.size); |
| 1194 | vmcs_conf->revision_id = vmx_msr_low; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1195 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1196 | vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control; |
| 1197 | vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control; |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1198 | vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control; |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1199 | vmcs_conf->vmexit_ctrl = _vmexit_control; |
| 1200 | vmcs_conf->vmentry_ctrl = _vmentry_control; |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1201 | |
| 1202 | return 0; |
Nguyen Anh Quynh | c68876f | 2006-12-29 16:49:54 -0800 | [diff] [blame] | 1203 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1204 | |
| 1205 | static struct vmcs *alloc_vmcs_cpu(int cpu) |
| 1206 | { |
| 1207 | int node = cpu_to_node(cpu); |
| 1208 | struct page *pages; |
| 1209 | struct vmcs *vmcs; |
| 1210 | |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1211 | pages = alloc_pages_node(node, GFP_KERNEL, vmcs_config.order); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1212 | if (!pages) |
| 1213 | return NULL; |
| 1214 | vmcs = page_address(pages); |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1215 | memset(vmcs, 0, vmcs_config.size); |
| 1216 | vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1217 | return vmcs; |
| 1218 | } |
| 1219 | |
| 1220 | static struct vmcs *alloc_vmcs(void) |
| 1221 | { |
Ingo Molnar | d3b2c33 | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 1222 | return alloc_vmcs_cpu(raw_smp_processor_id()); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1223 | } |
| 1224 | |
| 1225 | static void free_vmcs(struct vmcs *vmcs) |
| 1226 | { |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1227 | free_pages((unsigned long)vmcs, vmcs_config.order); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1228 | } |
| 1229 | |
Sam Ravnborg | 3995958 | 2007-06-01 00:47:13 -0700 | [diff] [blame] | 1230 | static void free_kvm_area(void) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1231 | { |
| 1232 | int cpu; |
| 1233 | |
| 1234 | for_each_online_cpu(cpu) |
| 1235 | free_vmcs(per_cpu(vmxarea, cpu)); |
| 1236 | } |
| 1237 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1238 | static __init int alloc_kvm_area(void) |
| 1239 | { |
| 1240 | int cpu; |
| 1241 | |
| 1242 | for_each_online_cpu(cpu) { |
| 1243 | struct vmcs *vmcs; |
| 1244 | |
| 1245 | vmcs = alloc_vmcs_cpu(cpu); |
| 1246 | if (!vmcs) { |
| 1247 | free_kvm_area(); |
| 1248 | return -ENOMEM; |
| 1249 | } |
| 1250 | |
| 1251 | per_cpu(vmxarea, cpu) = vmcs; |
| 1252 | } |
| 1253 | return 0; |
| 1254 | } |
| 1255 | |
| 1256 | static __init int hardware_setup(void) |
| 1257 | { |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1258 | if (setup_vmcs_config(&vmcs_config) < 0) |
| 1259 | return -EIO; |
Joerg Roedel | 50a37eb | 2008-01-31 14:57:38 +0100 | [diff] [blame] | 1260 | |
| 1261 | if (boot_cpu_has(X86_FEATURE_NX)) |
| 1262 | kvm_enable_efer_bits(EFER_NX); |
| 1263 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1264 | return alloc_kvm_area(); |
| 1265 | } |
| 1266 | |
| 1267 | static __exit void hardware_unsetup(void) |
| 1268 | { |
| 1269 | free_kvm_area(); |
| 1270 | } |
| 1271 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1272 | static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save) |
| 1273 | { |
| 1274 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1275 | |
Avi Kivity | 6af11b9 | 2007-03-19 13:18:10 +0200 | [diff] [blame] | 1276 | if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1277 | vmcs_write16(sf->selector, save->selector); |
| 1278 | vmcs_writel(sf->base, save->base); |
| 1279 | vmcs_write32(sf->limit, save->limit); |
| 1280 | vmcs_write32(sf->ar_bytes, save->ar); |
| 1281 | } else { |
| 1282 | u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK) |
| 1283 | << AR_DPL_SHIFT; |
| 1284 | vmcs_write32(sf->ar_bytes, 0x93 | dpl); |
| 1285 | } |
| 1286 | } |
| 1287 | |
| 1288 | static void enter_pmode(struct kvm_vcpu *vcpu) |
| 1289 | { |
| 1290 | unsigned long flags; |
| 1291 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1292 | vcpu->arch.rmode.active = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1293 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1294 | vmcs_writel(GUEST_TR_BASE, vcpu->arch.rmode.tr.base); |
| 1295 | vmcs_write32(GUEST_TR_LIMIT, vcpu->arch.rmode.tr.limit); |
| 1296 | vmcs_write32(GUEST_TR_AR_BYTES, vcpu->arch.rmode.tr.ar); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1297 | |
| 1298 | flags = vmcs_readl(GUEST_RFLAGS); |
Glauber de Oliveira Costa | 053de04 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 1299 | flags &= ~(X86_EFLAGS_IOPL | X86_EFLAGS_VM); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1300 | flags |= (vcpu->arch.rmode.save_iopl << IOPL_SHIFT); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1301 | vmcs_writel(GUEST_RFLAGS, flags); |
| 1302 | |
Rusty Russell | 66aee91 | 2007-07-17 23:34:16 +1000 | [diff] [blame] | 1303 | vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) | |
| 1304 | (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME)); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1305 | |
| 1306 | update_exception_bitmap(vcpu); |
| 1307 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1308 | fix_pmode_dataseg(VCPU_SREG_ES, &vcpu->arch.rmode.es); |
| 1309 | fix_pmode_dataseg(VCPU_SREG_DS, &vcpu->arch.rmode.ds); |
| 1310 | fix_pmode_dataseg(VCPU_SREG_GS, &vcpu->arch.rmode.gs); |
| 1311 | fix_pmode_dataseg(VCPU_SREG_FS, &vcpu->arch.rmode.fs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1312 | |
| 1313 | vmcs_write16(GUEST_SS_SELECTOR, 0); |
| 1314 | vmcs_write32(GUEST_SS_AR_BYTES, 0x93); |
| 1315 | |
| 1316 | vmcs_write16(GUEST_CS_SELECTOR, |
| 1317 | vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK); |
| 1318 | vmcs_write32(GUEST_CS_AR_BYTES, 0x9b); |
| 1319 | } |
| 1320 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 1321 | static gva_t rmode_tss_base(struct kvm *kvm) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1322 | { |
Zhang Xiantao | bfc6d22 | 2007-12-14 10:20:16 +0800 | [diff] [blame] | 1323 | if (!kvm->arch.tss_addr) { |
Izik Eidus | cbc9402 | 2007-10-25 00:29:55 +0200 | [diff] [blame] | 1324 | gfn_t base_gfn = kvm->memslots[0].base_gfn + |
| 1325 | kvm->memslots[0].npages - 3; |
| 1326 | return base_gfn << PAGE_SHIFT; |
| 1327 | } |
Zhang Xiantao | bfc6d22 | 2007-12-14 10:20:16 +0800 | [diff] [blame] | 1328 | return kvm->arch.tss_addr; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1329 | } |
| 1330 | |
| 1331 | static void fix_rmode_seg(int seg, struct kvm_save_segment *save) |
| 1332 | { |
| 1333 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1334 | |
| 1335 | save->selector = vmcs_read16(sf->selector); |
| 1336 | save->base = vmcs_readl(sf->base); |
| 1337 | save->limit = vmcs_read32(sf->limit); |
| 1338 | save->ar = vmcs_read32(sf->ar_bytes); |
Jan Kiszka | 15b00f3 | 2007-11-19 10:21:45 +0100 | [diff] [blame] | 1339 | vmcs_write16(sf->selector, save->base >> 4); |
| 1340 | vmcs_write32(sf->base, save->base & 0xfffff); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1341 | vmcs_write32(sf->limit, 0xffff); |
| 1342 | vmcs_write32(sf->ar_bytes, 0xf3); |
| 1343 | } |
| 1344 | |
| 1345 | static void enter_rmode(struct kvm_vcpu *vcpu) |
| 1346 | { |
| 1347 | unsigned long flags; |
| 1348 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1349 | vcpu->arch.rmode.active = 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1350 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1351 | vcpu->arch.rmode.tr.base = vmcs_readl(GUEST_TR_BASE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1352 | vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm)); |
| 1353 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1354 | vcpu->arch.rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1355 | vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1); |
| 1356 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1357 | vcpu->arch.rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1358 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); |
| 1359 | |
| 1360 | flags = vmcs_readl(GUEST_RFLAGS); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1361 | vcpu->arch.rmode.save_iopl |
| 1362 | = (flags & X86_EFLAGS_IOPL) >> IOPL_SHIFT; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1363 | |
Glauber de Oliveira Costa | 053de04 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 1364 | flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1365 | |
| 1366 | vmcs_writel(GUEST_RFLAGS, flags); |
Rusty Russell | 66aee91 | 2007-07-17 23:34:16 +1000 | [diff] [blame] | 1367 | vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1368 | update_exception_bitmap(vcpu); |
| 1369 | |
| 1370 | vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4); |
| 1371 | vmcs_write32(GUEST_SS_LIMIT, 0xffff); |
| 1372 | vmcs_write32(GUEST_SS_AR_BYTES, 0xf3); |
| 1373 | |
| 1374 | vmcs_write32(GUEST_CS_AR_BYTES, 0xf3); |
Michael Riepe | abacf8d | 2006-12-22 01:05:45 -0800 | [diff] [blame] | 1375 | vmcs_write32(GUEST_CS_LIMIT, 0xffff); |
Avi Kivity | 8cb5b03 | 2007-03-20 18:40:40 +0200 | [diff] [blame] | 1376 | if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000) |
| 1377 | vmcs_writel(GUEST_CS_BASE, 0xf0000); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1378 | vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4); |
| 1379 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1380 | fix_rmode_seg(VCPU_SREG_ES, &vcpu->arch.rmode.es); |
| 1381 | fix_rmode_seg(VCPU_SREG_DS, &vcpu->arch.rmode.ds); |
| 1382 | fix_rmode_seg(VCPU_SREG_GS, &vcpu->arch.rmode.gs); |
| 1383 | fix_rmode_seg(VCPU_SREG_FS, &vcpu->arch.rmode.fs); |
Avi Kivity | 75880a0 | 2007-06-20 11:20:04 +0300 | [diff] [blame] | 1384 | |
Eddie Dong | 8668a3c | 2007-10-10 14:26:45 +0800 | [diff] [blame] | 1385 | kvm_mmu_reset_context(vcpu); |
Sheng Yang | b7ebfb0 | 2008-04-25 21:44:52 +0800 | [diff] [blame] | 1386 | init_rmode(vcpu->kvm); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1387 | } |
| 1388 | |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1389 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1390 | |
| 1391 | static void enter_lmode(struct kvm_vcpu *vcpu) |
| 1392 | { |
| 1393 | u32 guest_tr_ar; |
| 1394 | |
| 1395 | guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES); |
| 1396 | if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) { |
| 1397 | printk(KERN_DEBUG "%s: tss fixup for long mode. \n", |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 1398 | __func__); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1399 | vmcs_write32(GUEST_TR_AR_BYTES, |
| 1400 | (guest_tr_ar & ~AR_TYPE_MASK) |
| 1401 | | AR_TYPE_BUSY_64_TSS); |
| 1402 | } |
| 1403 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1404 | vcpu->arch.shadow_efer |= EFER_LMA; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1405 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1406 | find_msr_entry(to_vmx(vcpu), MSR_EFER)->data |= EFER_LMA | EFER_LME; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1407 | vmcs_write32(VM_ENTRY_CONTROLS, |
| 1408 | vmcs_read32(VM_ENTRY_CONTROLS) |
Li, Xin B | 1e4e6e0 | 2007-08-01 21:49:10 +0300 | [diff] [blame] | 1409 | | VM_ENTRY_IA32E_MODE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1410 | } |
| 1411 | |
| 1412 | static void exit_lmode(struct kvm_vcpu *vcpu) |
| 1413 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1414 | vcpu->arch.shadow_efer &= ~EFER_LMA; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1415 | |
| 1416 | vmcs_write32(VM_ENTRY_CONTROLS, |
| 1417 | vmcs_read32(VM_ENTRY_CONTROLS) |
Li, Xin B | 1e4e6e0 | 2007-08-01 21:49:10 +0300 | [diff] [blame] | 1418 | & ~VM_ENTRY_IA32E_MODE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1419 | } |
| 1420 | |
| 1421 | #endif |
| 1422 | |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 1423 | static void vmx_flush_tlb(struct kvm_vcpu *vcpu) |
| 1424 | { |
| 1425 | vpid_sync_vcpu_all(to_vmx(vcpu)); |
Sheng Yang | 4e1096d | 2008-07-06 19:16:51 +0800 | [diff] [blame] | 1426 | if (vm_need_ept()) |
| 1427 | ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa)); |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 1428 | } |
| 1429 | |
Anthony Liguori | 25c4c27 | 2007-04-27 09:29:21 +0300 | [diff] [blame] | 1430 | static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) |
Avi Kivity | 399badf | 2007-01-05 16:36:38 -0800 | [diff] [blame] | 1431 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1432 | vcpu->arch.cr4 &= KVM_GUEST_CR4_MASK; |
| 1433 | vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & ~KVM_GUEST_CR4_MASK; |
Avi Kivity | 399badf | 2007-01-05 16:36:38 -0800 | [diff] [blame] | 1434 | } |
| 1435 | |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 1436 | static void ept_load_pdptrs(struct kvm_vcpu *vcpu) |
| 1437 | { |
| 1438 | if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) { |
| 1439 | if (!load_pdptrs(vcpu, vcpu->arch.cr3)) { |
| 1440 | printk(KERN_ERR "EPT: Fail to load pdptrs!\n"); |
| 1441 | return; |
| 1442 | } |
| 1443 | vmcs_write64(GUEST_PDPTR0, vcpu->arch.pdptrs[0]); |
| 1444 | vmcs_write64(GUEST_PDPTR1, vcpu->arch.pdptrs[1]); |
| 1445 | vmcs_write64(GUEST_PDPTR2, vcpu->arch.pdptrs[2]); |
| 1446 | vmcs_write64(GUEST_PDPTR3, vcpu->arch.pdptrs[3]); |
| 1447 | } |
| 1448 | } |
| 1449 | |
| 1450 | static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); |
| 1451 | |
| 1452 | static void ept_update_paging_mode_cr0(unsigned long *hw_cr0, |
| 1453 | unsigned long cr0, |
| 1454 | struct kvm_vcpu *vcpu) |
| 1455 | { |
| 1456 | if (!(cr0 & X86_CR0_PG)) { |
| 1457 | /* From paging/starting to nonpaging */ |
| 1458 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, |
Sheng Yang | 65267ea | 2008-06-18 14:43:38 +0800 | [diff] [blame] | 1459 | vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) | |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 1460 | (CPU_BASED_CR3_LOAD_EXITING | |
| 1461 | CPU_BASED_CR3_STORE_EXITING)); |
| 1462 | vcpu->arch.cr0 = cr0; |
| 1463 | vmx_set_cr4(vcpu, vcpu->arch.cr4); |
| 1464 | *hw_cr0 |= X86_CR0_PE | X86_CR0_PG; |
| 1465 | *hw_cr0 &= ~X86_CR0_WP; |
| 1466 | } else if (!is_paging(vcpu)) { |
| 1467 | /* From nonpaging to paging */ |
| 1468 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, |
Sheng Yang | 65267ea | 2008-06-18 14:43:38 +0800 | [diff] [blame] | 1469 | vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) & |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 1470 | ~(CPU_BASED_CR3_LOAD_EXITING | |
| 1471 | CPU_BASED_CR3_STORE_EXITING)); |
| 1472 | vcpu->arch.cr0 = cr0; |
| 1473 | vmx_set_cr4(vcpu, vcpu->arch.cr4); |
| 1474 | if (!(vcpu->arch.cr0 & X86_CR0_WP)) |
| 1475 | *hw_cr0 &= ~X86_CR0_WP; |
| 1476 | } |
| 1477 | } |
| 1478 | |
| 1479 | static void ept_update_paging_mode_cr4(unsigned long *hw_cr4, |
| 1480 | struct kvm_vcpu *vcpu) |
| 1481 | { |
| 1482 | if (!is_paging(vcpu)) { |
| 1483 | *hw_cr4 &= ~X86_CR4_PAE; |
| 1484 | *hw_cr4 |= X86_CR4_PSE; |
| 1485 | } else if (!(vcpu->arch.cr4 & X86_CR4_PAE)) |
| 1486 | *hw_cr4 &= ~X86_CR4_PAE; |
| 1487 | } |
| 1488 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1489 | static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
| 1490 | { |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 1491 | unsigned long hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK) | |
| 1492 | KVM_VM_CR0_ALWAYS_ON; |
| 1493 | |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1494 | vmx_fpu_deactivate(vcpu); |
| 1495 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1496 | if (vcpu->arch.rmode.active && (cr0 & X86_CR0_PE)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1497 | enter_pmode(vcpu); |
| 1498 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1499 | if (!vcpu->arch.rmode.active && !(cr0 & X86_CR0_PE)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1500 | enter_rmode(vcpu); |
| 1501 | |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1502 | #ifdef CONFIG_X86_64 |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1503 | if (vcpu->arch.shadow_efer & EFER_LME) { |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1504 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1505 | enter_lmode(vcpu); |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1506 | if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1507 | exit_lmode(vcpu); |
| 1508 | } |
| 1509 | #endif |
| 1510 | |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 1511 | if (vm_need_ept()) |
| 1512 | ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu); |
| 1513 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1514 | vmcs_writel(CR0_READ_SHADOW, cr0); |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 1515 | vmcs_writel(GUEST_CR0, hw_cr0); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1516 | vcpu->arch.cr0 = cr0; |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1517 | |
Rusty Russell | 707d92fa | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1518 | if (!(cr0 & X86_CR0_TS) || !(cr0 & X86_CR0_PE)) |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1519 | vmx_fpu_activate(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1520 | } |
| 1521 | |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 1522 | static u64 construct_eptp(unsigned long root_hpa) |
| 1523 | { |
| 1524 | u64 eptp; |
| 1525 | |
| 1526 | /* TODO write the value reading from MSR */ |
| 1527 | eptp = VMX_EPT_DEFAULT_MT | |
| 1528 | VMX_EPT_DEFAULT_GAW << VMX_EPT_GAW_EPTP_SHIFT; |
| 1529 | eptp |= (root_hpa & PAGE_MASK); |
| 1530 | |
| 1531 | return eptp; |
| 1532 | } |
| 1533 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1534 | static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
| 1535 | { |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 1536 | unsigned long guest_cr3; |
| 1537 | u64 eptp; |
| 1538 | |
| 1539 | guest_cr3 = cr3; |
| 1540 | if (vm_need_ept()) { |
| 1541 | eptp = construct_eptp(cr3); |
| 1542 | vmcs_write64(EPT_POINTER, eptp); |
| 1543 | ept_sync_context(eptp); |
| 1544 | ept_load_pdptrs(vcpu); |
| 1545 | guest_cr3 = is_paging(vcpu) ? vcpu->arch.cr3 : |
| 1546 | VMX_EPT_IDENTITY_PAGETABLE_ADDR; |
| 1547 | } |
| 1548 | |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 1549 | vmx_flush_tlb(vcpu); |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 1550 | vmcs_writel(GUEST_CR3, guest_cr3); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1551 | if (vcpu->arch.cr0 & X86_CR0_PE) |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1552 | vmx_fpu_deactivate(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1553 | } |
| 1554 | |
| 1555 | static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
| 1556 | { |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 1557 | unsigned long hw_cr4 = cr4 | (vcpu->arch.rmode.active ? |
| 1558 | KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON); |
| 1559 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1560 | vcpu->arch.cr4 = cr4; |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 1561 | if (vm_need_ept()) |
| 1562 | ept_update_paging_mode_cr4(&hw_cr4, vcpu); |
| 1563 | |
| 1564 | vmcs_writel(CR4_READ_SHADOW, cr4); |
| 1565 | vmcs_writel(GUEST_CR4, hw_cr4); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1566 | } |
| 1567 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1568 | static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer) |
| 1569 | { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1570 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 1571 | struct kvm_msr_entry *msr = find_msr_entry(vmx, MSR_EFER); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1572 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1573 | vcpu->arch.shadow_efer = efer; |
Joerg Roedel | 9f62e19 | 2008-01-31 14:57:39 +0100 | [diff] [blame] | 1574 | if (!msr) |
| 1575 | return; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1576 | if (efer & EFER_LMA) { |
| 1577 | vmcs_write32(VM_ENTRY_CONTROLS, |
| 1578 | vmcs_read32(VM_ENTRY_CONTROLS) | |
Li, Xin B | 1e4e6e0 | 2007-08-01 21:49:10 +0300 | [diff] [blame] | 1579 | VM_ENTRY_IA32E_MODE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1580 | msr->data = efer; |
| 1581 | |
| 1582 | } else { |
| 1583 | vmcs_write32(VM_ENTRY_CONTROLS, |
| 1584 | vmcs_read32(VM_ENTRY_CONTROLS) & |
Li, Xin B | 1e4e6e0 | 2007-08-01 21:49:10 +0300 | [diff] [blame] | 1585 | ~VM_ENTRY_IA32E_MODE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1586 | |
| 1587 | msr->data = efer & ~EFER_LME; |
| 1588 | } |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1589 | setup_msrs(vmx); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1590 | } |
| 1591 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1592 | static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg) |
| 1593 | { |
| 1594 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1595 | |
| 1596 | return vmcs_readl(sf->base); |
| 1597 | } |
| 1598 | |
| 1599 | static void vmx_get_segment(struct kvm_vcpu *vcpu, |
| 1600 | struct kvm_segment *var, int seg) |
| 1601 | { |
| 1602 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1603 | u32 ar; |
| 1604 | |
| 1605 | var->base = vmcs_readl(sf->base); |
| 1606 | var->limit = vmcs_read32(sf->limit); |
| 1607 | var->selector = vmcs_read16(sf->selector); |
| 1608 | ar = vmcs_read32(sf->ar_bytes); |
| 1609 | if (ar & AR_UNUSABLE_MASK) |
| 1610 | ar = 0; |
| 1611 | var->type = ar & 15; |
| 1612 | var->s = (ar >> 4) & 1; |
| 1613 | var->dpl = (ar >> 5) & 3; |
| 1614 | var->present = (ar >> 7) & 1; |
| 1615 | var->avl = (ar >> 12) & 1; |
| 1616 | var->l = (ar >> 13) & 1; |
| 1617 | var->db = (ar >> 14) & 1; |
| 1618 | var->g = (ar >> 15) & 1; |
| 1619 | var->unusable = (ar >> 16) & 1; |
| 1620 | } |
| 1621 | |
Izik Eidus | 2e4d265 | 2008-03-24 19:38:34 +0200 | [diff] [blame] | 1622 | static int vmx_get_cpl(struct kvm_vcpu *vcpu) |
| 1623 | { |
| 1624 | struct kvm_segment kvm_seg; |
| 1625 | |
| 1626 | if (!(vcpu->arch.cr0 & X86_CR0_PE)) /* if real mode */ |
| 1627 | return 0; |
| 1628 | |
| 1629 | if (vmx_get_rflags(vcpu) & X86_EFLAGS_VM) /* if virtual 8086 */ |
| 1630 | return 3; |
| 1631 | |
| 1632 | vmx_get_segment(vcpu, &kvm_seg, VCPU_SREG_CS); |
| 1633 | return kvm_seg.selector & 3; |
| 1634 | } |
| 1635 | |
Avi Kivity | 653e310 | 2007-05-07 10:55:37 +0300 | [diff] [blame] | 1636 | static u32 vmx_segment_access_rights(struct kvm_segment *var) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1637 | { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1638 | u32 ar; |
| 1639 | |
Avi Kivity | 653e310 | 2007-05-07 10:55:37 +0300 | [diff] [blame] | 1640 | if (var->unusable) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1641 | ar = 1 << 16; |
| 1642 | else { |
| 1643 | ar = var->type & 15; |
| 1644 | ar |= (var->s & 1) << 4; |
| 1645 | ar |= (var->dpl & 3) << 5; |
| 1646 | ar |= (var->present & 1) << 7; |
| 1647 | ar |= (var->avl & 1) << 12; |
| 1648 | ar |= (var->l & 1) << 13; |
| 1649 | ar |= (var->db & 1) << 14; |
| 1650 | ar |= (var->g & 1) << 15; |
| 1651 | } |
Uri Lublin | f7fbf1f | 2006-12-13 00:34:00 -0800 | [diff] [blame] | 1652 | if (ar == 0) /* a 0 value means unusable */ |
| 1653 | ar = AR_UNUSABLE_MASK; |
Avi Kivity | 653e310 | 2007-05-07 10:55:37 +0300 | [diff] [blame] | 1654 | |
| 1655 | return ar; |
| 1656 | } |
| 1657 | |
| 1658 | static void vmx_set_segment(struct kvm_vcpu *vcpu, |
| 1659 | struct kvm_segment *var, int seg) |
| 1660 | { |
| 1661 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1662 | u32 ar; |
| 1663 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1664 | if (vcpu->arch.rmode.active && seg == VCPU_SREG_TR) { |
| 1665 | vcpu->arch.rmode.tr.selector = var->selector; |
| 1666 | vcpu->arch.rmode.tr.base = var->base; |
| 1667 | vcpu->arch.rmode.tr.limit = var->limit; |
| 1668 | vcpu->arch.rmode.tr.ar = vmx_segment_access_rights(var); |
Avi Kivity | 653e310 | 2007-05-07 10:55:37 +0300 | [diff] [blame] | 1669 | return; |
| 1670 | } |
| 1671 | vmcs_writel(sf->base, var->base); |
| 1672 | vmcs_write32(sf->limit, var->limit); |
| 1673 | vmcs_write16(sf->selector, var->selector); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1674 | if (vcpu->arch.rmode.active && var->s) { |
Avi Kivity | 653e310 | 2007-05-07 10:55:37 +0300 | [diff] [blame] | 1675 | /* |
| 1676 | * Hack real-mode segments into vm86 compatibility. |
| 1677 | */ |
| 1678 | if (var->base == 0xffff0000 && var->selector == 0xf000) |
| 1679 | vmcs_writel(sf->base, 0xf0000); |
| 1680 | ar = 0xf3; |
| 1681 | } else |
| 1682 | ar = vmx_segment_access_rights(var); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1683 | vmcs_write32(sf->ar_bytes, ar); |
| 1684 | } |
| 1685 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1686 | static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
| 1687 | { |
| 1688 | u32 ar = vmcs_read32(GUEST_CS_AR_BYTES); |
| 1689 | |
| 1690 | *db = (ar >> 14) & 1; |
| 1691 | *l = (ar >> 13) & 1; |
| 1692 | } |
| 1693 | |
| 1694 | static void vmx_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 1695 | { |
| 1696 | dt->limit = vmcs_read32(GUEST_IDTR_LIMIT); |
| 1697 | dt->base = vmcs_readl(GUEST_IDTR_BASE); |
| 1698 | } |
| 1699 | |
| 1700 | static void vmx_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 1701 | { |
| 1702 | vmcs_write32(GUEST_IDTR_LIMIT, dt->limit); |
| 1703 | vmcs_writel(GUEST_IDTR_BASE, dt->base); |
| 1704 | } |
| 1705 | |
| 1706 | static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 1707 | { |
| 1708 | dt->limit = vmcs_read32(GUEST_GDTR_LIMIT); |
| 1709 | dt->base = vmcs_readl(GUEST_GDTR_BASE); |
| 1710 | } |
| 1711 | |
| 1712 | static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 1713 | { |
| 1714 | vmcs_write32(GUEST_GDTR_LIMIT, dt->limit); |
| 1715 | vmcs_writel(GUEST_GDTR_BASE, dt->base); |
| 1716 | } |
| 1717 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 1718 | static int init_rmode_tss(struct kvm *kvm) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1719 | { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1720 | gfn_t fn = rmode_tss_base(kvm) >> PAGE_SHIFT; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1721 | u16 data = 0; |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 1722 | int ret = 0; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1723 | int r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1724 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1725 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
| 1726 | if (r < 0) |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 1727 | goto out; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1728 | data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE; |
| 1729 | r = kvm_write_guest_page(kvm, fn++, &data, 0x66, sizeof(u16)); |
| 1730 | if (r < 0) |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 1731 | goto out; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1732 | r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE); |
| 1733 | if (r < 0) |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 1734 | goto out; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1735 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
| 1736 | if (r < 0) |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 1737 | goto out; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1738 | data = ~0; |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 1739 | r = kvm_write_guest_page(kvm, fn, &data, |
| 1740 | RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1, |
| 1741 | sizeof(u8)); |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1742 | if (r < 0) |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 1743 | goto out; |
| 1744 | |
| 1745 | ret = 1; |
| 1746 | out: |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 1747 | return ret; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1748 | } |
| 1749 | |
Sheng Yang | b7ebfb0 | 2008-04-25 21:44:52 +0800 | [diff] [blame] | 1750 | static int init_rmode_identity_map(struct kvm *kvm) |
| 1751 | { |
| 1752 | int i, r, ret; |
| 1753 | pfn_t identity_map_pfn; |
| 1754 | u32 tmp; |
| 1755 | |
| 1756 | if (!vm_need_ept()) |
| 1757 | return 1; |
| 1758 | if (unlikely(!kvm->arch.ept_identity_pagetable)) { |
| 1759 | printk(KERN_ERR "EPT: identity-mapping pagetable " |
| 1760 | "haven't been allocated!\n"); |
| 1761 | return 0; |
| 1762 | } |
| 1763 | if (likely(kvm->arch.ept_identity_pagetable_done)) |
| 1764 | return 1; |
| 1765 | ret = 0; |
| 1766 | identity_map_pfn = VMX_EPT_IDENTITY_PAGETABLE_ADDR >> PAGE_SHIFT; |
| 1767 | r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE); |
| 1768 | if (r < 0) |
| 1769 | goto out; |
| 1770 | /* Set up identity-mapping pagetable for EPT in real mode */ |
| 1771 | for (i = 0; i < PT32_ENT_PER_PAGE; i++) { |
| 1772 | tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | |
| 1773 | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE); |
| 1774 | r = kvm_write_guest_page(kvm, identity_map_pfn, |
| 1775 | &tmp, i * sizeof(tmp), sizeof(tmp)); |
| 1776 | if (r < 0) |
| 1777 | goto out; |
| 1778 | } |
| 1779 | kvm->arch.ept_identity_pagetable_done = true; |
| 1780 | ret = 1; |
| 1781 | out: |
| 1782 | return ret; |
| 1783 | } |
| 1784 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1785 | static void seg_setup(int seg) |
| 1786 | { |
| 1787 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1788 | |
| 1789 | vmcs_write16(sf->selector, 0); |
| 1790 | vmcs_writel(sf->base, 0); |
| 1791 | vmcs_write32(sf->limit, 0xffff); |
| 1792 | vmcs_write32(sf->ar_bytes, 0x93); |
| 1793 | } |
| 1794 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1795 | static int alloc_apic_access_page(struct kvm *kvm) |
| 1796 | { |
| 1797 | struct kvm_userspace_memory_region kvm_userspace_mem; |
| 1798 | int r = 0; |
| 1799 | |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 1800 | down_write(&kvm->slots_lock); |
Zhang Xiantao | bfc6d22 | 2007-12-14 10:20:16 +0800 | [diff] [blame] | 1801 | if (kvm->arch.apic_access_page) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1802 | goto out; |
| 1803 | kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT; |
| 1804 | kvm_userspace_mem.flags = 0; |
| 1805 | kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL; |
| 1806 | kvm_userspace_mem.memory_size = PAGE_SIZE; |
| 1807 | r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0); |
| 1808 | if (r) |
| 1809 | goto out; |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 1810 | |
| 1811 | down_read(¤t->mm->mmap_sem); |
Zhang Xiantao | bfc6d22 | 2007-12-14 10:20:16 +0800 | [diff] [blame] | 1812 | kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00); |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 1813 | up_read(¤t->mm->mmap_sem); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1814 | out: |
Izik Eidus | 72dc67a | 2008-02-10 18:04:15 +0200 | [diff] [blame] | 1815 | up_write(&kvm->slots_lock); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1816 | return r; |
| 1817 | } |
| 1818 | |
Sheng Yang | b7ebfb0 | 2008-04-25 21:44:52 +0800 | [diff] [blame] | 1819 | static int alloc_identity_pagetable(struct kvm *kvm) |
| 1820 | { |
| 1821 | struct kvm_userspace_memory_region kvm_userspace_mem; |
| 1822 | int r = 0; |
| 1823 | |
| 1824 | down_write(&kvm->slots_lock); |
| 1825 | if (kvm->arch.ept_identity_pagetable) |
| 1826 | goto out; |
| 1827 | kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT; |
| 1828 | kvm_userspace_mem.flags = 0; |
| 1829 | kvm_userspace_mem.guest_phys_addr = VMX_EPT_IDENTITY_PAGETABLE_ADDR; |
| 1830 | kvm_userspace_mem.memory_size = PAGE_SIZE; |
| 1831 | r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0); |
| 1832 | if (r) |
| 1833 | goto out; |
| 1834 | |
| 1835 | down_read(¤t->mm->mmap_sem); |
| 1836 | kvm->arch.ept_identity_pagetable = gfn_to_page(kvm, |
| 1837 | VMX_EPT_IDENTITY_PAGETABLE_ADDR >> PAGE_SHIFT); |
| 1838 | up_read(¤t->mm->mmap_sem); |
| 1839 | out: |
| 1840 | up_write(&kvm->slots_lock); |
| 1841 | return r; |
| 1842 | } |
| 1843 | |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 1844 | static void allocate_vpid(struct vcpu_vmx *vmx) |
| 1845 | { |
| 1846 | int vpid; |
| 1847 | |
| 1848 | vmx->vpid = 0; |
| 1849 | if (!enable_vpid || !cpu_has_vmx_vpid()) |
| 1850 | return; |
| 1851 | spin_lock(&vmx_vpid_lock); |
| 1852 | vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS); |
| 1853 | if (vpid < VMX_NR_VPIDS) { |
| 1854 | vmx->vpid = vpid; |
| 1855 | __set_bit(vpid, vmx_vpid_bitmap); |
| 1856 | } |
| 1857 | spin_unlock(&vmx_vpid_lock); |
| 1858 | } |
| 1859 | |
Harvey Harrison | 8b2cf73 | 2008-04-27 12:14:13 -0700 | [diff] [blame] | 1860 | static void vmx_disable_intercept_for_msr(struct page *msr_bitmap, u32 msr) |
Sheng Yang | 25c5f22 | 2008-03-28 13:18:56 +0800 | [diff] [blame] | 1861 | { |
| 1862 | void *va; |
| 1863 | |
| 1864 | if (!cpu_has_vmx_msr_bitmap()) |
| 1865 | return; |
| 1866 | |
| 1867 | /* |
| 1868 | * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals |
| 1869 | * have the write-low and read-high bitmap offsets the wrong way round. |
| 1870 | * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff. |
| 1871 | */ |
| 1872 | va = kmap(msr_bitmap); |
| 1873 | if (msr <= 0x1fff) { |
| 1874 | __clear_bit(msr, va + 0x000); /* read-low */ |
| 1875 | __clear_bit(msr, va + 0x800); /* write-low */ |
| 1876 | } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) { |
| 1877 | msr &= 0x1fff; |
| 1878 | __clear_bit(msr, va + 0x400); /* read-high */ |
| 1879 | __clear_bit(msr, va + 0xc00); /* write-high */ |
| 1880 | } |
| 1881 | kunmap(msr_bitmap); |
| 1882 | } |
| 1883 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1884 | /* |
| 1885 | * Sets up the vmcs for emulated real mode. |
| 1886 | */ |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1887 | static int vmx_vcpu_setup(struct vcpu_vmx *vmx) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1888 | { |
| 1889 | u32 host_sysenter_cs; |
| 1890 | u32 junk; |
| 1891 | unsigned long a; |
| 1892 | struct descriptor_table dt; |
| 1893 | int i; |
Avi Kivity | cd2276a | 2007-05-14 20:41:13 +0300 | [diff] [blame] | 1894 | unsigned long kvm_vmx_return; |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 1895 | u32 exec_control; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1896 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1897 | /* I/O */ |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 1898 | vmcs_write64(IO_BITMAP_A, page_to_phys(vmx_io_bitmap_a)); |
| 1899 | vmcs_write64(IO_BITMAP_B, page_to_phys(vmx_io_bitmap_b)); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1900 | |
Sheng Yang | 25c5f22 | 2008-03-28 13:18:56 +0800 | [diff] [blame] | 1901 | if (cpu_has_vmx_msr_bitmap()) |
| 1902 | vmcs_write64(MSR_BITMAP, page_to_phys(vmx_msr_bitmap)); |
| 1903 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1904 | vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */ |
| 1905 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1906 | /* Control */ |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1907 | vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, |
| 1908 | vmcs_config.pin_based_exec_ctrl); |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 1909 | |
| 1910 | exec_control = vmcs_config.cpu_based_exec_ctrl; |
| 1911 | if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) { |
| 1912 | exec_control &= ~CPU_BASED_TPR_SHADOW; |
| 1913 | #ifdef CONFIG_X86_64 |
| 1914 | exec_control |= CPU_BASED_CR8_STORE_EXITING | |
| 1915 | CPU_BASED_CR8_LOAD_EXITING; |
| 1916 | #endif |
| 1917 | } |
Sheng Yang | d56f546 | 2008-04-25 10:13:16 +0800 | [diff] [blame] | 1918 | if (!vm_need_ept()) |
| 1919 | exec_control |= CPU_BASED_CR3_STORE_EXITING | |
| 1920 | CPU_BASED_CR3_LOAD_EXITING; |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 1921 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1922 | |
Sheng Yang | 83ff3b9 | 2007-11-21 14:33:25 +0800 | [diff] [blame] | 1923 | if (cpu_has_secondary_exec_ctrls()) { |
| 1924 | exec_control = vmcs_config.cpu_based_2nd_exec_ctrl; |
| 1925 | if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) |
| 1926 | exec_control &= |
| 1927 | ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 1928 | if (vmx->vpid == 0) |
| 1929 | exec_control &= ~SECONDARY_EXEC_ENABLE_VPID; |
Sheng Yang | d56f546 | 2008-04-25 10:13:16 +0800 | [diff] [blame] | 1930 | if (!vm_need_ept()) |
| 1931 | exec_control &= ~SECONDARY_EXEC_ENABLE_EPT; |
Sheng Yang | 83ff3b9 | 2007-11-21 14:33:25 +0800 | [diff] [blame] | 1932 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control); |
| 1933 | } |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1934 | |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame] | 1935 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf); |
| 1936 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1937 | vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */ |
| 1938 | |
| 1939 | vmcs_writel(HOST_CR0, read_cr0()); /* 22.2.3 */ |
| 1940 | vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */ |
| 1941 | vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */ |
| 1942 | |
| 1943 | vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */ |
| 1944 | vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
| 1945 | vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
Avi Kivity | d6e88ae | 2008-07-10 16:53:33 +0300 | [diff] [blame] | 1946 | vmcs_write16(HOST_FS_SELECTOR, kvm_read_fs()); /* 22.2.4 */ |
| 1947 | vmcs_write16(HOST_GS_SELECTOR, kvm_read_gs()); /* 22.2.4 */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1948 | vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1949 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1950 | rdmsrl(MSR_FS_BASE, a); |
| 1951 | vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */ |
| 1952 | rdmsrl(MSR_GS_BASE, a); |
| 1953 | vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */ |
| 1954 | #else |
| 1955 | vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */ |
| 1956 | vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */ |
| 1957 | #endif |
| 1958 | |
| 1959 | vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */ |
| 1960 | |
Avi Kivity | d6e88ae | 2008-07-10 16:53:33 +0300 | [diff] [blame] | 1961 | kvm_get_idt(&dt); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1962 | vmcs_writel(HOST_IDTR_BASE, dt.base); /* 22.2.4 */ |
| 1963 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 1964 | asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return)); |
Avi Kivity | cd2276a | 2007-05-14 20:41:13 +0300 | [diff] [blame] | 1965 | vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */ |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 1966 | vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0); |
| 1967 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0); |
| 1968 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1969 | |
| 1970 | rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk); |
| 1971 | vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs); |
| 1972 | rdmsrl(MSR_IA32_SYSENTER_ESP, a); |
| 1973 | vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */ |
| 1974 | rdmsrl(MSR_IA32_SYSENTER_EIP, a); |
| 1975 | vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */ |
| 1976 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1977 | for (i = 0; i < NR_VMX_MSR; ++i) { |
| 1978 | u32 index = vmx_msr_index[i]; |
| 1979 | u32 data_low, data_high; |
| 1980 | u64 data; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 1981 | int j = vmx->nmsrs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1982 | |
| 1983 | if (rdmsr_safe(index, &data_low, &data_high) < 0) |
| 1984 | continue; |
Avi Kivity | 432bd6c | 2007-01-31 23:48:13 -0800 | [diff] [blame] | 1985 | if (wrmsr_safe(index, data_low, data_high) < 0) |
| 1986 | continue; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1987 | data = data_low | ((u64)data_high << 32); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 1988 | vmx->host_msrs[j].index = index; |
| 1989 | vmx->host_msrs[j].reserved = 0; |
| 1990 | vmx->host_msrs[j].data = data; |
| 1991 | vmx->guest_msrs[j] = vmx->host_msrs[j]; |
| 1992 | ++vmx->nmsrs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1993 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1994 | |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1995 | vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1996 | |
| 1997 | /* 22.2.1, 20.8.1 */ |
Yang, Sheng | 1c3d14fe | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1998 | vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl); |
| 1999 | |
Avi Kivity | e00c8cf | 2007-10-21 11:00:39 +0200 | [diff] [blame] | 2000 | vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL); |
| 2001 | vmcs_writel(CR4_GUEST_HOST_MASK, KVM_GUEST_CR4_MASK); |
| 2002 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 2003 | |
Avi Kivity | e00c8cf | 2007-10-21 11:00:39 +0200 | [diff] [blame] | 2004 | return 0; |
| 2005 | } |
| 2006 | |
Sheng Yang | b7ebfb0 | 2008-04-25 21:44:52 +0800 | [diff] [blame] | 2007 | static int init_rmode(struct kvm *kvm) |
| 2008 | { |
| 2009 | if (!init_rmode_tss(kvm)) |
| 2010 | return 0; |
| 2011 | if (!init_rmode_identity_map(kvm)) |
| 2012 | return 0; |
| 2013 | return 1; |
| 2014 | } |
| 2015 | |
Avi Kivity | e00c8cf | 2007-10-21 11:00:39 +0200 | [diff] [blame] | 2016 | static int vmx_vcpu_reset(struct kvm_vcpu *vcpu) |
| 2017 | { |
| 2018 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 2019 | u64 msr; |
| 2020 | int ret; |
| 2021 | |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 2022 | down_read(&vcpu->kvm->slots_lock); |
Sheng Yang | b7ebfb0 | 2008-04-25 21:44:52 +0800 | [diff] [blame] | 2023 | if (!init_rmode(vmx->vcpu.kvm)) { |
Avi Kivity | e00c8cf | 2007-10-21 11:00:39 +0200 | [diff] [blame] | 2024 | ret = -ENOMEM; |
| 2025 | goto out; |
| 2026 | } |
| 2027 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2028 | vmx->vcpu.arch.rmode.active = 0; |
Avi Kivity | e00c8cf | 2007-10-21 11:00:39 +0200 | [diff] [blame] | 2029 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2030 | vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val(); |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 2031 | kvm_set_cr8(&vmx->vcpu, 0); |
Avi Kivity | e00c8cf | 2007-10-21 11:00:39 +0200 | [diff] [blame] | 2032 | msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; |
| 2033 | if (vmx->vcpu.vcpu_id == 0) |
| 2034 | msr |= MSR_IA32_APICBASE_BSP; |
| 2035 | kvm_set_apic_base(&vmx->vcpu, msr); |
| 2036 | |
| 2037 | fx_init(&vmx->vcpu); |
| 2038 | |
| 2039 | /* |
| 2040 | * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode |
| 2041 | * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh. |
| 2042 | */ |
| 2043 | if (vmx->vcpu.vcpu_id == 0) { |
| 2044 | vmcs_write16(GUEST_CS_SELECTOR, 0xf000); |
| 2045 | vmcs_writel(GUEST_CS_BASE, 0x000f0000); |
| 2046 | } else { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2047 | vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8); |
| 2048 | vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12); |
Avi Kivity | e00c8cf | 2007-10-21 11:00:39 +0200 | [diff] [blame] | 2049 | } |
| 2050 | vmcs_write32(GUEST_CS_LIMIT, 0xffff); |
| 2051 | vmcs_write32(GUEST_CS_AR_BYTES, 0x9b); |
| 2052 | |
| 2053 | seg_setup(VCPU_SREG_DS); |
| 2054 | seg_setup(VCPU_SREG_ES); |
| 2055 | seg_setup(VCPU_SREG_FS); |
| 2056 | seg_setup(VCPU_SREG_GS); |
| 2057 | seg_setup(VCPU_SREG_SS); |
| 2058 | |
| 2059 | vmcs_write16(GUEST_TR_SELECTOR, 0); |
| 2060 | vmcs_writel(GUEST_TR_BASE, 0); |
| 2061 | vmcs_write32(GUEST_TR_LIMIT, 0xffff); |
| 2062 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); |
| 2063 | |
| 2064 | vmcs_write16(GUEST_LDTR_SELECTOR, 0); |
| 2065 | vmcs_writel(GUEST_LDTR_BASE, 0); |
| 2066 | vmcs_write32(GUEST_LDTR_LIMIT, 0xffff); |
| 2067 | vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082); |
| 2068 | |
| 2069 | vmcs_write32(GUEST_SYSENTER_CS, 0); |
| 2070 | vmcs_writel(GUEST_SYSENTER_ESP, 0); |
| 2071 | vmcs_writel(GUEST_SYSENTER_EIP, 0); |
| 2072 | |
| 2073 | vmcs_writel(GUEST_RFLAGS, 0x02); |
| 2074 | if (vmx->vcpu.vcpu_id == 0) |
| 2075 | vmcs_writel(GUEST_RIP, 0xfff0); |
| 2076 | else |
| 2077 | vmcs_writel(GUEST_RIP, 0); |
| 2078 | vmcs_writel(GUEST_RSP, 0); |
| 2079 | |
| 2080 | /* todo: dr0 = dr1 = dr2 = dr3 = 0; dr6 = 0xffff0ff0 */ |
| 2081 | vmcs_writel(GUEST_DR7, 0x400); |
| 2082 | |
| 2083 | vmcs_writel(GUEST_GDTR_BASE, 0); |
| 2084 | vmcs_write32(GUEST_GDTR_LIMIT, 0xffff); |
| 2085 | |
| 2086 | vmcs_writel(GUEST_IDTR_BASE, 0); |
| 2087 | vmcs_write32(GUEST_IDTR_LIMIT, 0xffff); |
| 2088 | |
| 2089 | vmcs_write32(GUEST_ACTIVITY_STATE, 0); |
| 2090 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0); |
| 2091 | vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0); |
| 2092 | |
| 2093 | guest_write_tsc(0); |
| 2094 | |
| 2095 | /* Special registers */ |
| 2096 | vmcs_write64(GUEST_IA32_DEBUGCTL, 0); |
| 2097 | |
| 2098 | setup_msrs(vmx); |
| 2099 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2100 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */ |
| 2101 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 2102 | if (cpu_has_vmx_tpr_shadow()) { |
| 2103 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0); |
| 2104 | if (vm_need_tpr_shadow(vmx->vcpu.kvm)) |
| 2105 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2106 | page_to_phys(vmx->vcpu.arch.apic->regs_page)); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 2107 | vmcs_write32(TPR_THRESHOLD, 0); |
| 2108 | } |
| 2109 | |
| 2110 | if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) |
| 2111 | vmcs_write64(APIC_ACCESS_ADDR, |
Zhang Xiantao | bfc6d22 | 2007-12-14 10:20:16 +0800 | [diff] [blame] | 2112 | page_to_phys(vmx->vcpu.kvm->arch.apic_access_page)); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2113 | |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 2114 | if (vmx->vpid != 0) |
| 2115 | vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid); |
| 2116 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2117 | vmx->vcpu.arch.cr0 = 0x60000010; |
| 2118 | vmx_set_cr0(&vmx->vcpu, vmx->vcpu.arch.cr0); /* enter rmode */ |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 2119 | vmx_set_cr4(&vmx->vcpu, 0); |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 2120 | vmx_set_efer(&vmx->vcpu, 0); |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 2121 | vmx_fpu_activate(&vmx->vcpu); |
| 2122 | update_exception_bitmap(&vmx->vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2123 | |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 2124 | vpid_sync_vcpu_all(vmx); |
| 2125 | |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 2126 | ret = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2127 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2128 | out: |
Marcelo Tosatti | 3200f40 | 2008-03-29 20:17:59 -0300 | [diff] [blame] | 2129 | up_read(&vcpu->kvm->slots_lock); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2130 | return ret; |
| 2131 | } |
| 2132 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2133 | static void vmx_inject_irq(struct kvm_vcpu *vcpu, int irq) |
| 2134 | { |
Avi Kivity | 9c8cba3 | 2007-11-22 11:42:59 +0200 | [diff] [blame] | 2135 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 2136 | |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2137 | KVMTRACE_1D(INJ_VIRQ, vcpu, (u32)irq, handler); |
| 2138 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2139 | if (vcpu->arch.rmode.active) { |
Avi Kivity | 9c8cba3 | 2007-11-22 11:42:59 +0200 | [diff] [blame] | 2140 | vmx->rmode.irq.pending = true; |
| 2141 | vmx->rmode.irq.vector = irq; |
| 2142 | vmx->rmode.irq.rip = vmcs_readl(GUEST_RIP); |
Avi Kivity | 9c5623e | 2007-11-08 18:19:20 +0200 | [diff] [blame] | 2143 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
| 2144 | irq | INTR_TYPE_SOFT_INTR | INTR_INFO_VALID_MASK); |
| 2145 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1); |
Avi Kivity | 9c8cba3 | 2007-11-22 11:42:59 +0200 | [diff] [blame] | 2146 | vmcs_writel(GUEST_RIP, vmx->rmode.irq.rip - 1); |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2147 | return; |
| 2148 | } |
| 2149 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
| 2150 | irq | INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); |
| 2151 | } |
| 2152 | |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 2153 | static void vmx_inject_nmi(struct kvm_vcpu *vcpu) |
| 2154 | { |
| 2155 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
| 2156 | INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR); |
| 2157 | vcpu->arch.nmi_pending = 0; |
| 2158 | } |
| 2159 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2160 | static void kvm_do_inject_irq(struct kvm_vcpu *vcpu) |
| 2161 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2162 | int word_index = __ffs(vcpu->arch.irq_summary); |
| 2163 | int bit_index = __ffs(vcpu->arch.irq_pending[word_index]); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2164 | int irq = word_index * BITS_PER_LONG + bit_index; |
| 2165 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2166 | clear_bit(bit_index, &vcpu->arch.irq_pending[word_index]); |
| 2167 | if (!vcpu->arch.irq_pending[word_index]) |
| 2168 | clear_bit(word_index, &vcpu->arch.irq_summary); |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2169 | vmx_inject_irq(vcpu, irq); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2170 | } |
| 2171 | |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2172 | |
| 2173 | static void do_interrupt_requests(struct kvm_vcpu *vcpu, |
| 2174 | struct kvm_run *kvm_run) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2175 | { |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2176 | u32 cpu_based_vm_exec_control; |
| 2177 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2178 | vcpu->arch.interrupt_window_open = |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2179 | ((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && |
| 2180 | (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0); |
| 2181 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2182 | if (vcpu->arch.interrupt_window_open && |
| 2183 | vcpu->arch.irq_summary && |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2184 | !(vmcs_read32(VM_ENTRY_INTR_INFO_FIELD) & INTR_INFO_VALID_MASK)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2185 | /* |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2186 | * If interrupts enabled, and not blocked by sti or mov ss. Good. |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2187 | */ |
| 2188 | kvm_do_inject_irq(vcpu); |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2189 | |
| 2190 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2191 | if (!vcpu->arch.interrupt_window_open && |
| 2192 | (vcpu->arch.irq_summary || kvm_run->request_interrupt_window)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2193 | /* |
| 2194 | * Interrupts blocked. Wait for unblock. |
| 2195 | */ |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2196 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING; |
| 2197 | else |
| 2198 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; |
| 2199 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2200 | } |
| 2201 | |
Izik Eidus | cbc9402 | 2007-10-25 00:29:55 +0200 | [diff] [blame] | 2202 | static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr) |
| 2203 | { |
| 2204 | int ret; |
| 2205 | struct kvm_userspace_memory_region tss_mem = { |
| 2206 | .slot = 8, |
| 2207 | .guest_phys_addr = addr, |
| 2208 | .memory_size = PAGE_SIZE * 3, |
| 2209 | .flags = 0, |
| 2210 | }; |
| 2211 | |
| 2212 | ret = kvm_set_memory_region(kvm, &tss_mem, 0); |
| 2213 | if (ret) |
| 2214 | return ret; |
Zhang Xiantao | bfc6d22 | 2007-12-14 10:20:16 +0800 | [diff] [blame] | 2215 | kvm->arch.tss_addr = addr; |
Izik Eidus | cbc9402 | 2007-10-25 00:29:55 +0200 | [diff] [blame] | 2216 | return 0; |
| 2217 | } |
| 2218 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2219 | static void kvm_guest_debug_pre(struct kvm_vcpu *vcpu) |
| 2220 | { |
| 2221 | struct kvm_guest_debug *dbg = &vcpu->guest_debug; |
| 2222 | |
| 2223 | set_debugreg(dbg->bp[0], 0); |
| 2224 | set_debugreg(dbg->bp[1], 1); |
| 2225 | set_debugreg(dbg->bp[2], 2); |
| 2226 | set_debugreg(dbg->bp[3], 3); |
| 2227 | |
| 2228 | if (dbg->singlestep) { |
| 2229 | unsigned long flags; |
| 2230 | |
| 2231 | flags = vmcs_readl(GUEST_RFLAGS); |
| 2232 | flags |= X86_EFLAGS_TF | X86_EFLAGS_RF; |
| 2233 | vmcs_writel(GUEST_RFLAGS, flags); |
| 2234 | } |
| 2235 | } |
| 2236 | |
| 2237 | static int handle_rmode_exception(struct kvm_vcpu *vcpu, |
| 2238 | int vec, u32 err_code) |
| 2239 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2240 | if (!vcpu->arch.rmode.active) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2241 | return 0; |
| 2242 | |
Nitin A Kamble | b3f3770 | 2007-05-17 15:50:34 +0300 | [diff] [blame] | 2243 | /* |
| 2244 | * Instruction with address size override prefix opcode 0x67 |
| 2245 | * Cause the #SS fault with 0 error code in VM86 mode. |
| 2246 | */ |
| 2247 | if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0) |
Laurent Vivier | 3427318 | 2007-09-18 11:27:37 +0200 | [diff] [blame] | 2248 | if (emulate_instruction(vcpu, NULL, 0, 0, 0) == EMULATE_DONE) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2249 | return 1; |
| 2250 | return 0; |
| 2251 | } |
| 2252 | |
| 2253 | static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2254 | { |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 2255 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2256 | u32 intr_info, error_code; |
| 2257 | unsigned long cr2, rip; |
| 2258 | u32 vect_info; |
| 2259 | enum emulation_result er; |
| 2260 | |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 2261 | vect_info = vmx->idt_vectoring_info; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2262 | intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
| 2263 | |
| 2264 | if ((vect_info & VECTORING_INFO_VALID_MASK) && |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2265 | !is_page_fault(intr_info)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2266 | printk(KERN_ERR "%s: unexpected, vectoring info 0x%x " |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 2267 | "intr info 0x%x\n", __func__, vect_info, intr_info); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2268 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2269 | if (!irqchip_in_kernel(vcpu->kvm) && is_external_interrupt(vect_info)) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2270 | int irq = vect_info & VECTORING_INFO_VECTOR_MASK; |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2271 | set_bit(irq, vcpu->arch.irq_pending); |
| 2272 | set_bit(irq / BITS_PER_LONG, &vcpu->arch.irq_summary); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2273 | } |
| 2274 | |
Avi Kivity | 1b6269d | 2007-10-09 12:12:19 +0200 | [diff] [blame] | 2275 | if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) /* nmi */ |
| 2276 | return 1; /* already handled by vmx_vcpu_run() */ |
Anthony Liguori | 2ab455c | 2007-04-27 09:29:49 +0300 | [diff] [blame] | 2277 | |
| 2278 | if (is_no_device(intr_info)) { |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 2279 | vmx_fpu_activate(vcpu); |
Anthony Liguori | 2ab455c | 2007-04-27 09:29:49 +0300 | [diff] [blame] | 2280 | return 1; |
| 2281 | } |
| 2282 | |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 2283 | if (is_invalid_opcode(intr_info)) { |
Sheng Yang | 571008d | 2008-01-02 14:49:22 +0800 | [diff] [blame] | 2284 | er = emulate_instruction(vcpu, kvm_run, 0, 0, EMULTYPE_TRAP_UD); |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 2285 | if (er != EMULATE_DONE) |
Avi Kivity | 7ee5d940 | 2007-11-25 15:22:50 +0200 | [diff] [blame] | 2286 | kvm_queue_exception(vcpu, UD_VECTOR); |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 2287 | return 1; |
| 2288 | } |
| 2289 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2290 | error_code = 0; |
| 2291 | rip = vmcs_readl(GUEST_RIP); |
Ryan Harper | 2e11384 | 2008-02-11 10:26:38 -0600 | [diff] [blame] | 2292 | if (intr_info & INTR_INFO_DELIVER_CODE_MASK) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2293 | error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE); |
| 2294 | if (is_page_fault(intr_info)) { |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 2295 | /* EPT won't cause page fault directly */ |
| 2296 | if (vm_need_ept()) |
| 2297 | BUG(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2298 | cr2 = vmcs_readl(EXIT_QUALIFICATION); |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2299 | KVMTRACE_3D(PAGE_FAULT, vcpu, error_code, (u32)cr2, |
| 2300 | (u32)((u64)cr2 >> 32), handler); |
Avi Kivity | 577bdc4 | 2008-07-19 08:57:05 +0300 | [diff] [blame] | 2301 | if (vect_info & VECTORING_INFO_VALID_MASK) |
| 2302 | kvm_mmu_unprotect_page_virt(vcpu, cr2); |
Avi Kivity | 3067714 | 2007-10-28 18:48:59 +0200 | [diff] [blame] | 2303 | return kvm_mmu_page_fault(vcpu, cr2, error_code); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2304 | } |
| 2305 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2306 | if (vcpu->arch.rmode.active && |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2307 | handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK, |
Avi Kivity | 72d6e5a | 2007-06-05 16:15:51 +0300 | [diff] [blame] | 2308 | error_code)) { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2309 | if (vcpu->arch.halt_request) { |
| 2310 | vcpu->arch.halt_request = 0; |
Avi Kivity | 72d6e5a | 2007-06-05 16:15:51 +0300 | [diff] [blame] | 2311 | return kvm_emulate_halt(vcpu); |
| 2312 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2313 | return 1; |
Avi Kivity | 72d6e5a | 2007-06-05 16:15:51 +0300 | [diff] [blame] | 2314 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2315 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2316 | if ((intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK)) == |
| 2317 | (INTR_TYPE_EXCEPTION | 1)) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2318 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
| 2319 | return 0; |
| 2320 | } |
| 2321 | kvm_run->exit_reason = KVM_EXIT_EXCEPTION; |
| 2322 | kvm_run->ex.exception = intr_info & INTR_INFO_VECTOR_MASK; |
| 2323 | kvm_run->ex.error_code = error_code; |
| 2324 | return 0; |
| 2325 | } |
| 2326 | |
| 2327 | static int handle_external_interrupt(struct kvm_vcpu *vcpu, |
| 2328 | struct kvm_run *kvm_run) |
| 2329 | { |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2330 | ++vcpu->stat.irq_exits; |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2331 | KVMTRACE_1D(INTR, vcpu, vmcs_read32(VM_EXIT_INTR_INFO), handler); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2332 | return 1; |
| 2333 | } |
| 2334 | |
Avi Kivity | 988ad74 | 2007-02-12 00:54:36 -0800 | [diff] [blame] | 2335 | static int handle_triple_fault(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2336 | { |
| 2337 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; |
| 2338 | return 0; |
| 2339 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2340 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2341 | static int handle_io(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2342 | { |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 2343 | unsigned long exit_qualification; |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 2344 | int size, down, in, string, rep; |
| 2345 | unsigned port; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2346 | |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2347 | ++vcpu->stat.io_exits; |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 2348 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 2349 | string = (exit_qualification & 16) != 0; |
Laurent Vivier | e70669a | 2007-08-05 10:36:40 +0300 | [diff] [blame] | 2350 | |
| 2351 | if (string) { |
Laurent Vivier | 3427318 | 2007-09-18 11:27:37 +0200 | [diff] [blame] | 2352 | if (emulate_instruction(vcpu, |
| 2353 | kvm_run, 0, 0, 0) == EMULATE_DO_MMIO) |
Laurent Vivier | e70669a | 2007-08-05 10:36:40 +0300 | [diff] [blame] | 2354 | return 0; |
| 2355 | return 1; |
| 2356 | } |
| 2357 | |
| 2358 | size = (exit_qualification & 7) + 1; |
| 2359 | in = (exit_qualification & 8) != 0; |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 2360 | down = (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_DF) != 0; |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 2361 | rep = (exit_qualification & 32) != 0; |
| 2362 | port = exit_qualification >> 16; |
Laurent Vivier | e70669a | 2007-08-05 10:36:40 +0300 | [diff] [blame] | 2363 | |
Laurent Vivier | 3090dd7 | 2007-08-05 10:43:32 +0300 | [diff] [blame] | 2364 | return kvm_emulate_pio(vcpu, kvm_run, in, size, port); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2365 | } |
| 2366 | |
Ingo Molnar | 102d832 | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 2367 | static void |
| 2368 | vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) |
| 2369 | { |
| 2370 | /* |
| 2371 | * Patch in the VMCALL instruction: |
| 2372 | */ |
| 2373 | hypercall[0] = 0x0f; |
| 2374 | hypercall[1] = 0x01; |
| 2375 | hypercall[2] = 0xc1; |
Ingo Molnar | 102d832 | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 2376 | } |
| 2377 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2378 | static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2379 | { |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 2380 | unsigned long exit_qualification; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2381 | int cr; |
| 2382 | int reg; |
| 2383 | |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 2384 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2385 | cr = exit_qualification & 15; |
| 2386 | reg = (exit_qualification >> 8) & 15; |
| 2387 | switch ((exit_qualification >> 4) & 3) { |
| 2388 | case 0: /* mov to cr */ |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2389 | KVMTRACE_3D(CR_WRITE, vcpu, (u32)cr, (u32)vcpu->arch.regs[reg], |
| 2390 | (u32)((u64)vcpu->arch.regs[reg] >> 32), handler); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2391 | switch (cr) { |
| 2392 | case 0: |
| 2393 | vcpu_load_rsp_rip(vcpu); |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 2394 | kvm_set_cr0(vcpu, vcpu->arch.regs[reg]); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2395 | skip_emulated_instruction(vcpu); |
| 2396 | return 1; |
| 2397 | case 3: |
| 2398 | vcpu_load_rsp_rip(vcpu); |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 2399 | kvm_set_cr3(vcpu, vcpu->arch.regs[reg]); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2400 | skip_emulated_instruction(vcpu); |
| 2401 | return 1; |
| 2402 | case 4: |
| 2403 | vcpu_load_rsp_rip(vcpu); |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 2404 | kvm_set_cr4(vcpu, vcpu->arch.regs[reg]); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2405 | skip_emulated_instruction(vcpu); |
| 2406 | return 1; |
| 2407 | case 8: |
| 2408 | vcpu_load_rsp_rip(vcpu); |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 2409 | kvm_set_cr8(vcpu, vcpu->arch.regs[reg]); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2410 | skip_emulated_instruction(vcpu); |
Avi Kivity | e531406 | 2007-12-06 16:32:45 +0200 | [diff] [blame] | 2411 | if (irqchip_in_kernel(vcpu->kvm)) |
| 2412 | return 1; |
Yang, Sheng | 253abde | 2007-08-16 13:01:00 +0300 | [diff] [blame] | 2413 | kvm_run->exit_reason = KVM_EXIT_SET_TPR; |
| 2414 | return 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2415 | }; |
| 2416 | break; |
Anthony Liguori | 25c4c27 | 2007-04-27 09:29:21 +0300 | [diff] [blame] | 2417 | case 2: /* clts */ |
| 2418 | vcpu_load_rsp_rip(vcpu); |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 2419 | vmx_fpu_deactivate(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2420 | vcpu->arch.cr0 &= ~X86_CR0_TS; |
| 2421 | vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0); |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 2422 | vmx_fpu_activate(vcpu); |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2423 | KVMTRACE_0D(CLTS, vcpu, handler); |
Anthony Liguori | 25c4c27 | 2007-04-27 09:29:21 +0300 | [diff] [blame] | 2424 | skip_emulated_instruction(vcpu); |
| 2425 | return 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2426 | case 1: /*mov from cr*/ |
| 2427 | switch (cr) { |
| 2428 | case 3: |
| 2429 | vcpu_load_rsp_rip(vcpu); |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2430 | vcpu->arch.regs[reg] = vcpu->arch.cr3; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2431 | vcpu_put_rsp_rip(vcpu); |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2432 | KVMTRACE_3D(CR_READ, vcpu, (u32)cr, |
| 2433 | (u32)vcpu->arch.regs[reg], |
| 2434 | (u32)((u64)vcpu->arch.regs[reg] >> 32), |
| 2435 | handler); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2436 | skip_emulated_instruction(vcpu); |
| 2437 | return 1; |
| 2438 | case 8: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2439 | vcpu_load_rsp_rip(vcpu); |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 2440 | vcpu->arch.regs[reg] = kvm_get_cr8(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2441 | vcpu_put_rsp_rip(vcpu); |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2442 | KVMTRACE_2D(CR_READ, vcpu, (u32)cr, |
| 2443 | (u32)vcpu->arch.regs[reg], handler); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2444 | skip_emulated_instruction(vcpu); |
| 2445 | return 1; |
| 2446 | } |
| 2447 | break; |
| 2448 | case 3: /* lmsw */ |
Avi Kivity | 2d3ad1f | 2008-02-24 11:20:43 +0200 | [diff] [blame] | 2449 | kvm_lmsw(vcpu, (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2450 | |
| 2451 | skip_emulated_instruction(vcpu); |
| 2452 | return 1; |
| 2453 | default: |
| 2454 | break; |
| 2455 | } |
| 2456 | kvm_run->exit_reason = 0; |
Rusty Russell | f024247 | 2007-08-01 10:48:02 +1000 | [diff] [blame] | 2457 | pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n", |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2458 | (int)(exit_qualification >> 4) & 3, cr); |
| 2459 | return 0; |
| 2460 | } |
| 2461 | |
| 2462 | static int handle_dr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2463 | { |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 2464 | unsigned long exit_qualification; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2465 | unsigned long val; |
| 2466 | int dr, reg; |
| 2467 | |
| 2468 | /* |
| 2469 | * FIXME: this code assumes the host is debugging the guest. |
| 2470 | * need to deal with guest debugging itself too. |
| 2471 | */ |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 2472 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2473 | dr = exit_qualification & 7; |
| 2474 | reg = (exit_qualification >> 8) & 15; |
| 2475 | vcpu_load_rsp_rip(vcpu); |
| 2476 | if (exit_qualification & 16) { |
| 2477 | /* mov from dr */ |
| 2478 | switch (dr) { |
| 2479 | case 6: |
| 2480 | val = 0xffff0ff0; |
| 2481 | break; |
| 2482 | case 7: |
| 2483 | val = 0x400; |
| 2484 | break; |
| 2485 | default: |
| 2486 | val = 0; |
| 2487 | } |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2488 | vcpu->arch.regs[reg] = val; |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2489 | KVMTRACE_2D(DR_READ, vcpu, (u32)dr, (u32)val, handler); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2490 | } else { |
| 2491 | /* mov to dr */ |
| 2492 | } |
| 2493 | vcpu_put_rsp_rip(vcpu); |
| 2494 | skip_emulated_instruction(vcpu); |
| 2495 | return 1; |
| 2496 | } |
| 2497 | |
| 2498 | static int handle_cpuid(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2499 | { |
Avi Kivity | 06465c5 | 2007-02-28 20:46:53 +0200 | [diff] [blame] | 2500 | kvm_emulate_cpuid(vcpu); |
| 2501 | return 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2502 | } |
| 2503 | |
| 2504 | static int handle_rdmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2505 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2506 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2507 | u64 data; |
| 2508 | |
| 2509 | if (vmx_get_msr(vcpu, ecx, &data)) { |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 2510 | kvm_inject_gp(vcpu, 0); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2511 | return 1; |
| 2512 | } |
| 2513 | |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2514 | KVMTRACE_3D(MSR_READ, vcpu, ecx, (u32)data, (u32)(data >> 32), |
| 2515 | handler); |
| 2516 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2517 | /* FIXME: handling of bits 32:63 of rax, rdx */ |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2518 | vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u; |
| 2519 | vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2520 | skip_emulated_instruction(vcpu); |
| 2521 | return 1; |
| 2522 | } |
| 2523 | |
| 2524 | static int handle_wrmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2525 | { |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2526 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
| 2527 | u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u) |
| 2528 | | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2529 | |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2530 | KVMTRACE_3D(MSR_WRITE, vcpu, ecx, (u32)data, (u32)(data >> 32), |
| 2531 | handler); |
| 2532 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2533 | if (vmx_set_msr(vcpu, ecx, data) != 0) { |
Avi Kivity | c1a5d4f | 2007-11-25 14:12:03 +0200 | [diff] [blame] | 2534 | kvm_inject_gp(vcpu, 0); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2535 | return 1; |
| 2536 | } |
| 2537 | |
| 2538 | skip_emulated_instruction(vcpu); |
| 2539 | return 1; |
| 2540 | } |
| 2541 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 2542 | static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu, |
| 2543 | struct kvm_run *kvm_run) |
| 2544 | { |
| 2545 | return 1; |
| 2546 | } |
| 2547 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2548 | static int handle_interrupt_window(struct kvm_vcpu *vcpu, |
| 2549 | struct kvm_run *kvm_run) |
| 2550 | { |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2551 | u32 cpu_based_vm_exec_control; |
| 2552 | |
| 2553 | /* clear pending irq */ |
| 2554 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
| 2555 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; |
| 2556 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2557 | |
| 2558 | KVMTRACE_0D(PEND_INTR, vcpu, handler); |
| 2559 | |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2560 | /* |
| 2561 | * If the user space waits to inject interrupts, exit as soon as |
| 2562 | * possible |
| 2563 | */ |
| 2564 | if (kvm_run->request_interrupt_window && |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2565 | !vcpu->arch.irq_summary) { |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2566 | kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2567 | ++vcpu->stat.irq_window_exits; |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2568 | return 0; |
| 2569 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2570 | return 1; |
| 2571 | } |
| 2572 | |
| 2573 | static int handle_halt(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2574 | { |
| 2575 | skip_emulated_instruction(vcpu); |
Avi Kivity | d3bef15 | 2007-06-05 15:53:05 +0300 | [diff] [blame] | 2576 | return kvm_emulate_halt(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2577 | } |
| 2578 | |
Ingo Molnar | c21415e | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 2579 | static int handle_vmcall(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2580 | { |
Dor Laor | 510043d | 2007-02-19 18:25:43 +0200 | [diff] [blame] | 2581 | skip_emulated_instruction(vcpu); |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 2582 | kvm_emulate_hypercall(vcpu); |
| 2583 | return 1; |
Ingo Molnar | c21415e | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 2584 | } |
| 2585 | |
Eddie Dong | e5edaa0 | 2007-11-11 12:28:35 +0200 | [diff] [blame] | 2586 | static int handle_wbinvd(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2587 | { |
| 2588 | skip_emulated_instruction(vcpu); |
| 2589 | /* TODO: Add support for VT-d/pass-through device */ |
| 2590 | return 1; |
| 2591 | } |
| 2592 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 2593 | static int handle_apic_access(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2594 | { |
| 2595 | u64 exit_qualification; |
| 2596 | enum emulation_result er; |
| 2597 | unsigned long offset; |
| 2598 | |
| 2599 | exit_qualification = vmcs_read64(EXIT_QUALIFICATION); |
| 2600 | offset = exit_qualification & 0xffful; |
| 2601 | |
| 2602 | er = emulate_instruction(vcpu, kvm_run, 0, 0, 0); |
| 2603 | |
| 2604 | if (er != EMULATE_DONE) { |
| 2605 | printk(KERN_ERR |
| 2606 | "Fail to handle apic access vmexit! Offset is 0x%lx\n", |
| 2607 | offset); |
| 2608 | return -ENOTSUPP; |
| 2609 | } |
| 2610 | return 1; |
| 2611 | } |
| 2612 | |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 2613 | static int handle_task_switch(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2614 | { |
| 2615 | unsigned long exit_qualification; |
| 2616 | u16 tss_selector; |
| 2617 | int reason; |
| 2618 | |
| 2619 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
| 2620 | |
| 2621 | reason = (u32)exit_qualification >> 30; |
| 2622 | tss_selector = exit_qualification; |
| 2623 | |
| 2624 | return kvm_task_switch(vcpu, tss_selector, reason); |
| 2625 | } |
| 2626 | |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 2627 | static int handle_ept_violation(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2628 | { |
| 2629 | u64 exit_qualification; |
| 2630 | enum emulation_result er; |
| 2631 | gpa_t gpa; |
| 2632 | unsigned long hva; |
| 2633 | int gla_validity; |
| 2634 | int r; |
| 2635 | |
| 2636 | exit_qualification = vmcs_read64(EXIT_QUALIFICATION); |
| 2637 | |
| 2638 | if (exit_qualification & (1 << 6)) { |
| 2639 | printk(KERN_ERR "EPT: GPA exceeds GAW!\n"); |
| 2640 | return -ENOTSUPP; |
| 2641 | } |
| 2642 | |
| 2643 | gla_validity = (exit_qualification >> 7) & 0x3; |
| 2644 | if (gla_validity != 0x3 && gla_validity != 0x1 && gla_validity != 0) { |
| 2645 | printk(KERN_ERR "EPT: Handling EPT violation failed!\n"); |
| 2646 | printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n", |
| 2647 | (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS), |
| 2648 | (long unsigned int)vmcs_read64(GUEST_LINEAR_ADDRESS)); |
| 2649 | printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n", |
| 2650 | (long unsigned int)exit_qualification); |
| 2651 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; |
| 2652 | kvm_run->hw.hardware_exit_reason = 0; |
| 2653 | return -ENOTSUPP; |
| 2654 | } |
| 2655 | |
| 2656 | gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS); |
| 2657 | hva = gfn_to_hva(vcpu->kvm, gpa >> PAGE_SHIFT); |
| 2658 | if (!kvm_is_error_hva(hva)) { |
| 2659 | r = kvm_mmu_page_fault(vcpu, gpa & PAGE_MASK, 0); |
| 2660 | if (r < 0) { |
| 2661 | printk(KERN_ERR "EPT: Not enough memory!\n"); |
| 2662 | return -ENOMEM; |
| 2663 | } |
| 2664 | return 1; |
| 2665 | } else { |
| 2666 | /* must be MMIO */ |
| 2667 | er = emulate_instruction(vcpu, kvm_run, 0, 0, 0); |
| 2668 | |
| 2669 | if (er == EMULATE_FAIL) { |
| 2670 | printk(KERN_ERR |
| 2671 | "EPT: Fail to handle EPT violation vmexit!er is %d\n", |
| 2672 | er); |
| 2673 | printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n", |
| 2674 | (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS), |
| 2675 | (long unsigned int)vmcs_read64(GUEST_LINEAR_ADDRESS)); |
| 2676 | printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n", |
| 2677 | (long unsigned int)exit_qualification); |
| 2678 | return -ENOTSUPP; |
| 2679 | } else if (er == EMULATE_DO_MMIO) |
| 2680 | return 0; |
| 2681 | } |
| 2682 | return 1; |
| 2683 | } |
| 2684 | |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 2685 | static int handle_nmi_window(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2686 | { |
| 2687 | u32 cpu_based_vm_exec_control; |
| 2688 | |
| 2689 | /* clear pending NMI */ |
| 2690 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
| 2691 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING; |
| 2692 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); |
| 2693 | ++vcpu->stat.nmi_window_exits; |
| 2694 | |
| 2695 | return 1; |
| 2696 | } |
| 2697 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2698 | /* |
| 2699 | * The exit handlers return 1 if the exit was handled fully and guest execution |
| 2700 | * may resume. Otherwise they set the kvm_run parameter to indicate what needs |
| 2701 | * to be done to userspace and return 0. |
| 2702 | */ |
| 2703 | static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu, |
| 2704 | struct kvm_run *kvm_run) = { |
| 2705 | [EXIT_REASON_EXCEPTION_NMI] = handle_exception, |
| 2706 | [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt, |
Avi Kivity | 988ad74 | 2007-02-12 00:54:36 -0800 | [diff] [blame] | 2707 | [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault, |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 2708 | [EXIT_REASON_NMI_WINDOW] = handle_nmi_window, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2709 | [EXIT_REASON_IO_INSTRUCTION] = handle_io, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2710 | [EXIT_REASON_CR_ACCESS] = handle_cr, |
| 2711 | [EXIT_REASON_DR_ACCESS] = handle_dr, |
| 2712 | [EXIT_REASON_CPUID] = handle_cpuid, |
| 2713 | [EXIT_REASON_MSR_READ] = handle_rdmsr, |
| 2714 | [EXIT_REASON_MSR_WRITE] = handle_wrmsr, |
| 2715 | [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window, |
| 2716 | [EXIT_REASON_HLT] = handle_halt, |
Ingo Molnar | c21415e | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 2717 | [EXIT_REASON_VMCALL] = handle_vmcall, |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 2718 | [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold, |
| 2719 | [EXIT_REASON_APIC_ACCESS] = handle_apic_access, |
Eddie Dong | e5edaa0 | 2007-11-11 12:28:35 +0200 | [diff] [blame] | 2720 | [EXIT_REASON_WBINVD] = handle_wbinvd, |
Izik Eidus | 37817f2 | 2008-03-24 23:14:53 +0200 | [diff] [blame] | 2721 | [EXIT_REASON_TASK_SWITCH] = handle_task_switch, |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 2722 | [EXIT_REASON_EPT_VIOLATION] = handle_ept_violation, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2723 | }; |
| 2724 | |
| 2725 | static const int kvm_vmx_max_exit_handlers = |
Robert P. J. Day | 50a3485 | 2007-06-03 13:35:29 -0400 | [diff] [blame] | 2726 | ARRAY_SIZE(kvm_vmx_exit_handlers); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2727 | |
| 2728 | /* |
| 2729 | * The guest has exited. See if we can fix it or if we need userspace |
| 2730 | * assistance. |
| 2731 | */ |
| 2732 | static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) |
| 2733 | { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2734 | u32 exit_reason = vmcs_read32(VM_EXIT_REASON); |
Avi Kivity | 29bd8a7 | 2007-09-10 17:27:03 +0300 | [diff] [blame] | 2735 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 2736 | u32 vectoring_info = vmx->idt_vectoring_info; |
Avi Kivity | 29bd8a7 | 2007-09-10 17:27:03 +0300 | [diff] [blame] | 2737 | |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2738 | KVMTRACE_3D(VMEXIT, vcpu, exit_reason, (u32)vmcs_readl(GUEST_RIP), |
| 2739 | (u32)((u64)vmcs_readl(GUEST_RIP) >> 32), entryexit); |
| 2740 | |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 2741 | /* Access CR3 don't cause VMExit in paging mode, so we need |
| 2742 | * to sync with guest real CR3. */ |
| 2743 | if (vm_need_ept() && is_paging(vcpu)) { |
| 2744 | vcpu->arch.cr3 = vmcs_readl(GUEST_CR3); |
| 2745 | ept_load_pdptrs(vcpu); |
| 2746 | } |
| 2747 | |
Avi Kivity | 29bd8a7 | 2007-09-10 17:27:03 +0300 | [diff] [blame] | 2748 | if (unlikely(vmx->fail)) { |
| 2749 | kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY; |
| 2750 | kvm_run->fail_entry.hardware_entry_failure_reason |
| 2751 | = vmcs_read32(VM_INSTRUCTION_ERROR); |
| 2752 | return 0; |
| 2753 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2754 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2755 | if ((vectoring_info & VECTORING_INFO_VALID_MASK) && |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 2756 | (exit_reason != EXIT_REASON_EXCEPTION_NMI && |
| 2757 | exit_reason != EXIT_REASON_EPT_VIOLATION)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2758 | printk(KERN_WARNING "%s: unexpected, valid vectoring info and " |
Harvey Harrison | b8688d5 | 2008-03-03 12:59:56 -0800 | [diff] [blame] | 2759 | "exit reason is 0x%x\n", __func__, exit_reason); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2760 | if (exit_reason < kvm_vmx_max_exit_handlers |
| 2761 | && kvm_vmx_exit_handlers[exit_reason]) |
| 2762 | return kvm_vmx_exit_handlers[exit_reason](vcpu, kvm_run); |
| 2763 | else { |
| 2764 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; |
| 2765 | kvm_run->hw.hardware_exit_reason = exit_reason; |
| 2766 | } |
| 2767 | return 0; |
| 2768 | } |
| 2769 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 2770 | static void update_tpr_threshold(struct kvm_vcpu *vcpu) |
| 2771 | { |
| 2772 | int max_irr, tpr; |
| 2773 | |
| 2774 | if (!vm_need_tpr_shadow(vcpu->kvm)) |
| 2775 | return; |
| 2776 | |
| 2777 | if (!kvm_lapic_enabled(vcpu) || |
| 2778 | ((max_irr = kvm_lapic_find_highest_irr(vcpu)) == -1)) { |
| 2779 | vmcs_write32(TPR_THRESHOLD, 0); |
| 2780 | return; |
| 2781 | } |
| 2782 | |
| 2783 | tpr = (kvm_lapic_get_cr8(vcpu) & 0x0f) << 4; |
| 2784 | vmcs_write32(TPR_THRESHOLD, (max_irr > tpr) ? tpr >> 4 : max_irr >> 4); |
| 2785 | } |
| 2786 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2787 | static void enable_irq_window(struct kvm_vcpu *vcpu) |
| 2788 | { |
| 2789 | u32 cpu_based_vm_exec_control; |
| 2790 | |
| 2791 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
| 2792 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING; |
| 2793 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); |
| 2794 | } |
| 2795 | |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 2796 | static void enable_nmi_window(struct kvm_vcpu *vcpu) |
| 2797 | { |
| 2798 | u32 cpu_based_vm_exec_control; |
| 2799 | |
| 2800 | if (!cpu_has_virtual_nmis()) |
| 2801 | return; |
| 2802 | |
| 2803 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
| 2804 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING; |
| 2805 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); |
| 2806 | } |
| 2807 | |
| 2808 | static int vmx_nmi_enabled(struct kvm_vcpu *vcpu) |
| 2809 | { |
| 2810 | u32 guest_intr = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); |
| 2811 | return !(guest_intr & (GUEST_INTR_STATE_NMI | |
| 2812 | GUEST_INTR_STATE_MOV_SS | |
| 2813 | GUEST_INTR_STATE_STI)); |
| 2814 | } |
| 2815 | |
| 2816 | static int vmx_irq_enabled(struct kvm_vcpu *vcpu) |
| 2817 | { |
| 2818 | u32 guest_intr = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); |
| 2819 | return (!(guest_intr & (GUEST_INTR_STATE_MOV_SS | |
| 2820 | GUEST_INTR_STATE_STI)) && |
| 2821 | (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF)); |
| 2822 | } |
| 2823 | |
| 2824 | static void enable_intr_window(struct kvm_vcpu *vcpu) |
| 2825 | { |
| 2826 | if (vcpu->arch.nmi_pending) |
| 2827 | enable_nmi_window(vcpu); |
| 2828 | else if (kvm_cpu_has_interrupt(vcpu)) |
| 2829 | enable_irq_window(vcpu); |
| 2830 | } |
| 2831 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2832 | static void vmx_intr_assist(struct kvm_vcpu *vcpu) |
| 2833 | { |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 2834 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 2835 | u32 idtv_info_field, intr_info_field, exit_intr_info_field; |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 2836 | int vector; |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2837 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 2838 | update_tpr_threshold(vcpu); |
| 2839 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2840 | intr_info_field = vmcs_read32(VM_ENTRY_INTR_INFO_FIELD); |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 2841 | exit_intr_info_field = vmcs_read32(VM_EXIT_INTR_INFO); |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 2842 | idtv_info_field = vmx->idt_vectoring_info; |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2843 | if (intr_info_field & INTR_INFO_VALID_MASK) { |
| 2844 | if (idtv_info_field & INTR_INFO_VALID_MASK) { |
| 2845 | /* TODO: fault when IDT_Vectoring */ |
Ryan Harper | 9584bf2 | 2007-12-13 10:21:10 -0600 | [diff] [blame] | 2846 | if (printk_ratelimit()) |
| 2847 | printk(KERN_ERR "Fault when IDT_Vectoring\n"); |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2848 | } |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 2849 | enable_intr_window(vcpu); |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2850 | return; |
| 2851 | } |
| 2852 | if (unlikely(idtv_info_field & INTR_INFO_VALID_MASK)) { |
Avi Kivity | 9c8cba3 | 2007-11-22 11:42:59 +0200 | [diff] [blame] | 2853 | if ((idtv_info_field & VECTORING_INFO_TYPE_MASK) |
| 2854 | == INTR_TYPE_EXT_INTR |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2855 | && vcpu->arch.rmode.active) { |
Avi Kivity | 9c8cba3 | 2007-11-22 11:42:59 +0200 | [diff] [blame] | 2856 | u8 vect = idtv_info_field & VECTORING_INFO_VECTOR_MASK; |
| 2857 | |
| 2858 | vmx_inject_irq(vcpu, vect); |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 2859 | enable_intr_window(vcpu); |
Avi Kivity | 9c8cba3 | 2007-11-22 11:42:59 +0200 | [diff] [blame] | 2860 | return; |
| 2861 | } |
| 2862 | |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 2863 | KVMTRACE_1D(REDELIVER_EVT, vcpu, idtv_info_field, handler); |
| 2864 | |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 2865 | /* |
| 2866 | * SDM 3: 25.7.1.2 |
| 2867 | * Clear bit "block by NMI" before VM entry if a NMI delivery |
| 2868 | * faulted. |
| 2869 | */ |
| 2870 | if ((idtv_info_field & VECTORING_INFO_TYPE_MASK) |
| 2871 | == INTR_TYPE_NMI_INTR && cpu_has_virtual_nmis()) |
| 2872 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, |
| 2873 | vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & |
| 2874 | ~GUEST_INTR_STATE_NMI); |
| 2875 | |
| 2876 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, idtv_info_field |
| 2877 | & ~INTR_INFO_RESVD_BITS_MASK); |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2878 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, |
| 2879 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN)); |
| 2880 | |
Ryan Harper | 2e11384 | 2008-02-11 10:26:38 -0600 | [diff] [blame] | 2881 | if (unlikely(idtv_info_field & INTR_INFO_DELIVER_CODE_MASK)) |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2882 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, |
| 2883 | vmcs_read32(IDT_VECTORING_ERROR_CODE)); |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 2884 | enable_intr_window(vcpu); |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2885 | return; |
| 2886 | } |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 2887 | if (cpu_has_virtual_nmis()) { |
| 2888 | /* |
| 2889 | * SDM 3: 25.7.1.2 |
| 2890 | * Re-set bit "block by NMI" before VM entry if vmexit caused by |
| 2891 | * a guest IRET fault. |
| 2892 | */ |
| 2893 | if ((exit_intr_info_field & INTR_INFO_UNBLOCK_NMI) && |
| 2894 | (exit_intr_info_field & INTR_INFO_VECTOR_MASK) != 8) |
| 2895 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, |
| 2896 | vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) | |
| 2897 | GUEST_INTR_STATE_NMI); |
| 2898 | else if (vcpu->arch.nmi_pending) { |
| 2899 | if (vmx_nmi_enabled(vcpu)) |
| 2900 | vmx_inject_nmi(vcpu); |
| 2901 | enable_intr_window(vcpu); |
| 2902 | return; |
| 2903 | } |
| 2904 | |
| 2905 | } |
| 2906 | if (!kvm_cpu_has_interrupt(vcpu)) |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2907 | return; |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 2908 | if (vmx_irq_enabled(vcpu)) { |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 2909 | vector = kvm_cpu_get_interrupt(vcpu); |
| 2910 | vmx_inject_irq(vcpu, vector); |
| 2911 | kvm_timer_intr_post(vcpu, vector); |
| 2912 | } else |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2913 | enable_irq_window(vcpu); |
| 2914 | } |
| 2915 | |
Avi Kivity | 9c8cba3 | 2007-11-22 11:42:59 +0200 | [diff] [blame] | 2916 | /* |
| 2917 | * Failure to inject an interrupt should give us the information |
| 2918 | * in IDT_VECTORING_INFO_FIELD. However, if the failure occurs |
| 2919 | * when fetching the interrupt redirection bitmap in the real-mode |
| 2920 | * tss, this doesn't happen. So we do it ourselves. |
| 2921 | */ |
| 2922 | static void fixup_rmode_irq(struct vcpu_vmx *vmx) |
| 2923 | { |
| 2924 | vmx->rmode.irq.pending = 0; |
| 2925 | if (vmcs_readl(GUEST_RIP) + 1 != vmx->rmode.irq.rip) |
| 2926 | return; |
| 2927 | vmcs_writel(GUEST_RIP, vmx->rmode.irq.rip); |
| 2928 | if (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK) { |
| 2929 | vmx->idt_vectoring_info &= ~VECTORING_INFO_TYPE_MASK; |
| 2930 | vmx->idt_vectoring_info |= INTR_TYPE_EXT_INTR; |
| 2931 | return; |
| 2932 | } |
| 2933 | vmx->idt_vectoring_info = |
| 2934 | VECTORING_INFO_VALID_MASK |
| 2935 | | INTR_TYPE_EXT_INTR |
| 2936 | | vmx->rmode.irq.vector; |
| 2937 | } |
| 2938 | |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2939 | static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2940 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2941 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
Avi Kivity | 1b6269d | 2007-10-09 12:12:19 +0200 | [diff] [blame] | 2942 | u32 intr_info; |
Avi Kivity | e6adf28 | 2007-04-30 16:07:54 +0300 | [diff] [blame] | 2943 | |
| 2944 | /* |
| 2945 | * Loading guest fpu may have cleared host cr0.ts |
| 2946 | */ |
| 2947 | vmcs_writel(HOST_CR0, read_cr0()); |
| 2948 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2949 | asm( |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2950 | /* Store host registers */ |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 2951 | #ifdef CONFIG_X86_64 |
Laurent Vivier | c203630 | 2007-10-25 14:18:52 +0200 | [diff] [blame] | 2952 | "push %%rdx; push %%rbp;" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2953 | "push %%rcx \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2954 | #else |
Laurent Vivier | ff593e5 | 2007-10-25 14:18:55 +0200 | [diff] [blame] | 2955 | "push %%edx; push %%ebp;" |
| 2956 | "push %%ecx \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2957 | #endif |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 2958 | __ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2959 | /* Check if vmlaunch of vmresume is needed */ |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 2960 | "cmpl $0, %c[launched](%0) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2961 | /* Load guest registers. Don't clobber flags. */ |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 2962 | #ifdef CONFIG_X86_64 |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 2963 | "mov %c[cr2](%0), %%rax \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2964 | "mov %%rax, %%cr2 \n\t" |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 2965 | "mov %c[rax](%0), %%rax \n\t" |
| 2966 | "mov %c[rbx](%0), %%rbx \n\t" |
| 2967 | "mov %c[rdx](%0), %%rdx \n\t" |
| 2968 | "mov %c[rsi](%0), %%rsi \n\t" |
| 2969 | "mov %c[rdi](%0), %%rdi \n\t" |
| 2970 | "mov %c[rbp](%0), %%rbp \n\t" |
| 2971 | "mov %c[r8](%0), %%r8 \n\t" |
| 2972 | "mov %c[r9](%0), %%r9 \n\t" |
| 2973 | "mov %c[r10](%0), %%r10 \n\t" |
| 2974 | "mov %c[r11](%0), %%r11 \n\t" |
| 2975 | "mov %c[r12](%0), %%r12 \n\t" |
| 2976 | "mov %c[r13](%0), %%r13 \n\t" |
| 2977 | "mov %c[r14](%0), %%r14 \n\t" |
| 2978 | "mov %c[r15](%0), %%r15 \n\t" |
| 2979 | "mov %c[rcx](%0), %%rcx \n\t" /* kills %0 (rcx) */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2980 | #else |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 2981 | "mov %c[cr2](%0), %%eax \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2982 | "mov %%eax, %%cr2 \n\t" |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 2983 | "mov %c[rax](%0), %%eax \n\t" |
| 2984 | "mov %c[rbx](%0), %%ebx \n\t" |
| 2985 | "mov %c[rdx](%0), %%edx \n\t" |
| 2986 | "mov %c[rsi](%0), %%esi \n\t" |
| 2987 | "mov %c[rdi](%0), %%edi \n\t" |
| 2988 | "mov %c[rbp](%0), %%ebp \n\t" |
| 2989 | "mov %c[rcx](%0), %%ecx \n\t" /* kills %0 (ecx) */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2990 | #endif |
| 2991 | /* Enter guest mode */ |
Avi Kivity | cd2276a | 2007-05-14 20:41:13 +0300 | [diff] [blame] | 2992 | "jne .Llaunched \n\t" |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 2993 | __ex(ASM_VMX_VMLAUNCH) "\n\t" |
Avi Kivity | cd2276a | 2007-05-14 20:41:13 +0300 | [diff] [blame] | 2994 | "jmp .Lkvm_vmx_return \n\t" |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 2995 | ".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t" |
Avi Kivity | cd2276a | 2007-05-14 20:41:13 +0300 | [diff] [blame] | 2996 | ".Lkvm_vmx_return: " |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2997 | /* Save guest registers, load host registers, keep flags */ |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 2998 | #ifdef CONFIG_X86_64 |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 2999 | "xchg %0, (%%rsp) \n\t" |
| 3000 | "mov %%rax, %c[rax](%0) \n\t" |
| 3001 | "mov %%rbx, %c[rbx](%0) \n\t" |
| 3002 | "pushq (%%rsp); popq %c[rcx](%0) \n\t" |
| 3003 | "mov %%rdx, %c[rdx](%0) \n\t" |
| 3004 | "mov %%rsi, %c[rsi](%0) \n\t" |
| 3005 | "mov %%rdi, %c[rdi](%0) \n\t" |
| 3006 | "mov %%rbp, %c[rbp](%0) \n\t" |
| 3007 | "mov %%r8, %c[r8](%0) \n\t" |
| 3008 | "mov %%r9, %c[r9](%0) \n\t" |
| 3009 | "mov %%r10, %c[r10](%0) \n\t" |
| 3010 | "mov %%r11, %c[r11](%0) \n\t" |
| 3011 | "mov %%r12, %c[r12](%0) \n\t" |
| 3012 | "mov %%r13, %c[r13](%0) \n\t" |
| 3013 | "mov %%r14, %c[r14](%0) \n\t" |
| 3014 | "mov %%r15, %c[r15](%0) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3015 | "mov %%cr2, %%rax \n\t" |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 3016 | "mov %%rax, %c[cr2](%0) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3017 | |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 3018 | "pop %%rbp; pop %%rbp; pop %%rdx \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3019 | #else |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 3020 | "xchg %0, (%%esp) \n\t" |
| 3021 | "mov %%eax, %c[rax](%0) \n\t" |
| 3022 | "mov %%ebx, %c[rbx](%0) \n\t" |
| 3023 | "pushl (%%esp); popl %c[rcx](%0) \n\t" |
| 3024 | "mov %%edx, %c[rdx](%0) \n\t" |
| 3025 | "mov %%esi, %c[rsi](%0) \n\t" |
| 3026 | "mov %%edi, %c[rdi](%0) \n\t" |
| 3027 | "mov %%ebp, %c[rbp](%0) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3028 | "mov %%cr2, %%eax \n\t" |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 3029 | "mov %%eax, %c[cr2](%0) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3030 | |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 3031 | "pop %%ebp; pop %%ebp; pop %%edx \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3032 | #endif |
Avi Kivity | e08aa78 | 2007-11-15 18:06:18 +0200 | [diff] [blame] | 3033 | "setbe %c[fail](%0) \n\t" |
| 3034 | : : "c"(vmx), "d"((unsigned long)HOST_RSP), |
| 3035 | [launched]"i"(offsetof(struct vcpu_vmx, launched)), |
| 3036 | [fail]"i"(offsetof(struct vcpu_vmx, fail)), |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3037 | [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])), |
| 3038 | [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])), |
| 3039 | [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])), |
| 3040 | [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])), |
| 3041 | [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])), |
| 3042 | [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])), |
| 3043 | [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])), |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 3044 | #ifdef CONFIG_X86_64 |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3045 | [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])), |
| 3046 | [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])), |
| 3047 | [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])), |
| 3048 | [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])), |
| 3049 | [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])), |
| 3050 | [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])), |
| 3051 | [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])), |
| 3052 | [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])), |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3053 | #endif |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3054 | [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2)) |
Laurent Vivier | c203630 | 2007-10-25 14:18:52 +0200 | [diff] [blame] | 3055 | : "cc", "memory" |
| 3056 | #ifdef CONFIG_X86_64 |
| 3057 | , "rbx", "rdi", "rsi" |
| 3058 | , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" |
Laurent Vivier | ff593e5 | 2007-10-25 14:18:55 +0200 | [diff] [blame] | 3059 | #else |
| 3060 | , "ebx", "edi", "rsi" |
Laurent Vivier | c203630 | 2007-10-25 14:18:52 +0200 | [diff] [blame] | 3061 | #endif |
| 3062 | ); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3063 | |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 3064 | vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); |
Avi Kivity | 9c8cba3 | 2007-11-22 11:42:59 +0200 | [diff] [blame] | 3065 | if (vmx->rmode.irq.pending) |
| 3066 | fixup_rmode_irq(vmx); |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame] | 3067 | |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 3068 | vcpu->arch.interrupt_window_open = |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 3069 | (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & |
| 3070 | (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS)) == 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3071 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 3072 | asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS)); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 3073 | vmx->launched = 1; |
Avi Kivity | 1b6269d | 2007-10-09 12:12:19 +0200 | [diff] [blame] | 3074 | |
| 3075 | intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
| 3076 | |
| 3077 | /* We need to handle NMIs before interrupts are enabled */ |
Sheng Yang | f08864b | 2008-05-15 18:23:25 +0800 | [diff] [blame] | 3078 | if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200 && |
| 3079 | (intr_info & INTR_INFO_VALID_MASK)) { |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 3080 | KVMTRACE_0D(NMI, vcpu, handler); |
Avi Kivity | 1b6269d | 2007-10-09 12:12:19 +0200 | [diff] [blame] | 3081 | asm("int $2"); |
Feng (Eric) Liu | 2714d1d | 2008-04-10 15:31:10 -0400 | [diff] [blame] | 3082 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3083 | } |
| 3084 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3085 | static void vmx_free_vmcs(struct kvm_vcpu *vcpu) |
| 3086 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 3087 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 3088 | |
| 3089 | if (vmx->vmcs) { |
Avi Kivity | 543e424 | 2008-05-13 16:22:47 +0300 | [diff] [blame] | 3090 | vcpu_clear(vmx); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 3091 | free_vmcs(vmx->vmcs); |
| 3092 | vmx->vmcs = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3093 | } |
| 3094 | } |
| 3095 | |
| 3096 | static void vmx_free_vcpu(struct kvm_vcpu *vcpu) |
| 3097 | { |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 3098 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 3099 | |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 3100 | spin_lock(&vmx_vpid_lock); |
| 3101 | if (vmx->vpid != 0) |
| 3102 | __clear_bit(vmx->vpid, vmx_vpid_bitmap); |
| 3103 | spin_unlock(&vmx_vpid_lock); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3104 | vmx_free_vmcs(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 3105 | kfree(vmx->host_msrs); |
| 3106 | kfree(vmx->guest_msrs); |
| 3107 | kvm_vcpu_uninit(vcpu); |
Rusty Russell | a477034 | 2007-08-01 14:46:11 +1000 | [diff] [blame] | 3108 | kmem_cache_free(kvm_vcpu_cache, vmx); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3109 | } |
| 3110 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 3111 | static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3112 | { |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 3113 | int err; |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 3114 | struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 3115 | int cpu; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3116 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 3117 | if (!vmx) |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 3118 | return ERR_PTR(-ENOMEM); |
| 3119 | |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 3120 | allocate_vpid(vmx); |
| 3121 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 3122 | err = kvm_vcpu_init(&vmx->vcpu, kvm, id); |
| 3123 | if (err) |
| 3124 | goto free_vcpu; |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 3125 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 3126 | vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 3127 | if (!vmx->guest_msrs) { |
| 3128 | err = -ENOMEM; |
| 3129 | goto uninit_vcpu; |
| 3130 | } |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 3131 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 3132 | vmx->host_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
| 3133 | if (!vmx->host_msrs) |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 3134 | goto free_guest_msrs; |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 3135 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 3136 | vmx->vmcs = alloc_vmcs(); |
| 3137 | if (!vmx->vmcs) |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 3138 | goto free_msrs; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 3139 | |
| 3140 | vmcs_clear(vmx->vmcs); |
| 3141 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 3142 | cpu = get_cpu(); |
| 3143 | vmx_vcpu_load(&vmx->vcpu, cpu); |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 3144 | err = vmx_vcpu_setup(vmx); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 3145 | vmx_vcpu_put(&vmx->vcpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 3146 | put_cpu(); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 3147 | if (err) |
| 3148 | goto free_vmcs; |
Marcelo Tosatti | 5e4a0b3 | 2008-02-14 21:21:43 -0200 | [diff] [blame] | 3149 | if (vm_need_virtualize_apic_accesses(kvm)) |
| 3150 | if (alloc_apic_access_page(kvm) != 0) |
| 3151 | goto free_vmcs; |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 3152 | |
Sheng Yang | b7ebfb0 | 2008-04-25 21:44:52 +0800 | [diff] [blame] | 3153 | if (vm_need_ept()) |
| 3154 | if (alloc_identity_pagetable(kvm) != 0) |
| 3155 | goto free_vmcs; |
| 3156 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 3157 | return &vmx->vcpu; |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 3158 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 3159 | free_vmcs: |
| 3160 | free_vmcs(vmx->vmcs); |
| 3161 | free_msrs: |
| 3162 | kfree(vmx->host_msrs); |
| 3163 | free_guest_msrs: |
| 3164 | kfree(vmx->guest_msrs); |
| 3165 | uninit_vcpu: |
| 3166 | kvm_vcpu_uninit(&vmx->vcpu); |
| 3167 | free_vcpu: |
Rusty Russell | a477034 | 2007-08-01 14:46:11 +1000 | [diff] [blame] | 3168 | kmem_cache_free(kvm_vcpu_cache, vmx); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 3169 | return ERR_PTR(err); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3170 | } |
| 3171 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 3172 | static void __init vmx_check_processor_compat(void *rtn) |
| 3173 | { |
| 3174 | struct vmcs_config vmcs_conf; |
| 3175 | |
| 3176 | *(int *)rtn = 0; |
| 3177 | if (setup_vmcs_config(&vmcs_conf) < 0) |
| 3178 | *(int *)rtn = -EIO; |
| 3179 | if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) { |
| 3180 | printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n", |
| 3181 | smp_processor_id()); |
| 3182 | *(int *)rtn = -EIO; |
| 3183 | } |
| 3184 | } |
| 3185 | |
Sheng Yang | 67253af | 2008-04-25 10:20:22 +0800 | [diff] [blame] | 3186 | static int get_ept_level(void) |
| 3187 | { |
| 3188 | return VMX_EPT_DEFAULT_GAW + 1; |
| 3189 | } |
| 3190 | |
Christian Ehrhardt | cbdd1be | 2007-09-09 15:41:59 +0300 | [diff] [blame] | 3191 | static struct kvm_x86_ops vmx_x86_ops = { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3192 | .cpu_has_kvm_support = cpu_has_kvm_support, |
| 3193 | .disabled_by_bios = vmx_disabled_by_bios, |
| 3194 | .hardware_setup = hardware_setup, |
| 3195 | .hardware_unsetup = hardware_unsetup, |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 3196 | .check_processor_compatibility = vmx_check_processor_compat, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3197 | .hardware_enable = hardware_enable, |
| 3198 | .hardware_disable = hardware_disable, |
Avi Kivity | 774ead3 | 2007-12-26 13:57:04 +0200 | [diff] [blame] | 3199 | .cpu_has_accelerated_tpr = cpu_has_vmx_virtualize_apic_accesses, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3200 | |
| 3201 | .vcpu_create = vmx_create_vcpu, |
| 3202 | .vcpu_free = vmx_free_vcpu, |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 3203 | .vcpu_reset = vmx_vcpu_reset, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3204 | |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 3205 | .prepare_guest_switch = vmx_save_host_state, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3206 | .vcpu_load = vmx_vcpu_load, |
| 3207 | .vcpu_put = vmx_vcpu_put, |
| 3208 | |
| 3209 | .set_guest_debug = set_guest_debug, |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 3210 | .guest_debug_pre = kvm_guest_debug_pre, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3211 | .get_msr = vmx_get_msr, |
| 3212 | .set_msr = vmx_set_msr, |
| 3213 | .get_segment_base = vmx_get_segment_base, |
| 3214 | .get_segment = vmx_get_segment, |
| 3215 | .set_segment = vmx_set_segment, |
Izik Eidus | 2e4d265 | 2008-03-24 19:38:34 +0200 | [diff] [blame] | 3216 | .get_cpl = vmx_get_cpl, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3217 | .get_cs_db_l_bits = vmx_get_cs_db_l_bits, |
Anthony Liguori | 25c4c27 | 2007-04-27 09:29:21 +0300 | [diff] [blame] | 3218 | .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3219 | .set_cr0 = vmx_set_cr0, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3220 | .set_cr3 = vmx_set_cr3, |
| 3221 | .set_cr4 = vmx_set_cr4, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3222 | .set_efer = vmx_set_efer, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3223 | .get_idt = vmx_get_idt, |
| 3224 | .set_idt = vmx_set_idt, |
| 3225 | .get_gdt = vmx_get_gdt, |
| 3226 | .set_gdt = vmx_set_gdt, |
| 3227 | .cache_regs = vcpu_load_rsp_rip, |
| 3228 | .decache_regs = vcpu_put_rsp_rip, |
| 3229 | .get_rflags = vmx_get_rflags, |
| 3230 | .set_rflags = vmx_set_rflags, |
| 3231 | |
| 3232 | .tlb_flush = vmx_flush_tlb, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3233 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3234 | .run = vmx_vcpu_run, |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 3235 | .handle_exit = kvm_handle_exit, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3236 | .skip_emulated_instruction = skip_emulated_instruction, |
Ingo Molnar | 102d832 | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 3237 | .patch_hypercall = vmx_patch_hypercall, |
Eddie Dong | 2a8067f | 2007-08-06 16:29:07 +0300 | [diff] [blame] | 3238 | .get_irq = vmx_get_irq, |
| 3239 | .set_irq = vmx_inject_irq, |
Avi Kivity | 298101d | 2007-11-25 13:41:11 +0200 | [diff] [blame] | 3240 | .queue_exception = vmx_queue_exception, |
| 3241 | .exception_injected = vmx_exception_injected, |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 3242 | .inject_pending_irq = vmx_intr_assist, |
| 3243 | .inject_pending_vectors = do_interrupt_requests, |
Izik Eidus | cbc9402 | 2007-10-25 00:29:55 +0200 | [diff] [blame] | 3244 | |
| 3245 | .set_tss_addr = vmx_set_tss_addr, |
Sheng Yang | 67253af | 2008-04-25 10:20:22 +0800 | [diff] [blame] | 3246 | .get_tdp_level = get_ept_level, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3247 | }; |
| 3248 | |
| 3249 | static int __init vmx_init(void) |
| 3250 | { |
Sheng Yang | 25c5f22 | 2008-03-28 13:18:56 +0800 | [diff] [blame] | 3251 | void *va; |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 3252 | int r; |
| 3253 | |
| 3254 | vmx_io_bitmap_a = alloc_page(GFP_KERNEL | __GFP_HIGHMEM); |
| 3255 | if (!vmx_io_bitmap_a) |
| 3256 | return -ENOMEM; |
| 3257 | |
| 3258 | vmx_io_bitmap_b = alloc_page(GFP_KERNEL | __GFP_HIGHMEM); |
| 3259 | if (!vmx_io_bitmap_b) { |
| 3260 | r = -ENOMEM; |
| 3261 | goto out; |
| 3262 | } |
| 3263 | |
Sheng Yang | 25c5f22 | 2008-03-28 13:18:56 +0800 | [diff] [blame] | 3264 | vmx_msr_bitmap = alloc_page(GFP_KERNEL | __GFP_HIGHMEM); |
| 3265 | if (!vmx_msr_bitmap) { |
| 3266 | r = -ENOMEM; |
| 3267 | goto out1; |
| 3268 | } |
| 3269 | |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 3270 | /* |
| 3271 | * Allow direct access to the PC debug port (it is often used for I/O |
| 3272 | * delays, but the vmexits simply slow things down). |
| 3273 | */ |
Sheng Yang | 25c5f22 | 2008-03-28 13:18:56 +0800 | [diff] [blame] | 3274 | va = kmap(vmx_io_bitmap_a); |
| 3275 | memset(va, 0xff, PAGE_SIZE); |
| 3276 | clear_bit(0x80, va); |
Avi Kivity | cd0536d | 2007-05-08 11:34:07 +0300 | [diff] [blame] | 3277 | kunmap(vmx_io_bitmap_a); |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 3278 | |
Sheng Yang | 25c5f22 | 2008-03-28 13:18:56 +0800 | [diff] [blame] | 3279 | va = kmap(vmx_io_bitmap_b); |
| 3280 | memset(va, 0xff, PAGE_SIZE); |
Avi Kivity | cd0536d | 2007-05-08 11:34:07 +0300 | [diff] [blame] | 3281 | kunmap(vmx_io_bitmap_b); |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 3282 | |
Sheng Yang | 25c5f22 | 2008-03-28 13:18:56 +0800 | [diff] [blame] | 3283 | va = kmap(vmx_msr_bitmap); |
| 3284 | memset(va, 0xff, PAGE_SIZE); |
| 3285 | kunmap(vmx_msr_bitmap); |
| 3286 | |
Sheng Yang | 2384d2b | 2008-01-17 15:14:33 +0800 | [diff] [blame] | 3287 | set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */ |
| 3288 | |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 3289 | r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx), THIS_MODULE); |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 3290 | if (r) |
Sheng Yang | 25c5f22 | 2008-03-28 13:18:56 +0800 | [diff] [blame] | 3291 | goto out2; |
| 3292 | |
| 3293 | vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_FS_BASE); |
| 3294 | vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_GS_BASE); |
| 3295 | vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_IA32_SYSENTER_CS); |
| 3296 | vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_IA32_SYSENTER_ESP); |
| 3297 | vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_IA32_SYSENTER_EIP); |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 3298 | |
Sheng Yang | 5fdbcb9 | 2008-07-16 09:25:40 +0800 | [diff] [blame] | 3299 | if (vm_need_ept()) { |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 3300 | bypass_guest_pf = 0; |
Sheng Yang | 5fdbcb9 | 2008-07-16 09:25:40 +0800 | [diff] [blame] | 3301 | kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK | |
| 3302 | VMX_EPT_WRITABLE_MASK | |
| 3303 | VMX_EPT_DEFAULT_MT << VMX_EPT_MT_EPTE_SHIFT); |
Sheng Yang | 534e38b | 2008-09-08 15:12:30 +0800 | [diff] [blame] | 3304 | kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull, |
Sheng Yang | 5fdbcb9 | 2008-07-16 09:25:40 +0800 | [diff] [blame] | 3305 | VMX_EPT_EXECUTABLE_MASK); |
| 3306 | kvm_enable_tdp(); |
| 3307 | } else |
| 3308 | kvm_disable_tdp(); |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 3309 | |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame] | 3310 | if (bypass_guest_pf) |
| 3311 | kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull); |
| 3312 | |
Sheng Yang | 1439442 | 2008-04-28 12:24:45 +0800 | [diff] [blame] | 3313 | ept_sync_global(); |
| 3314 | |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 3315 | return 0; |
| 3316 | |
Sheng Yang | 25c5f22 | 2008-03-28 13:18:56 +0800 | [diff] [blame] | 3317 | out2: |
| 3318 | __free_page(vmx_msr_bitmap); |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 3319 | out1: |
| 3320 | __free_page(vmx_io_bitmap_b); |
| 3321 | out: |
| 3322 | __free_page(vmx_io_bitmap_a); |
| 3323 | return r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3324 | } |
| 3325 | |
| 3326 | static void __exit vmx_exit(void) |
| 3327 | { |
Sheng Yang | 25c5f22 | 2008-03-28 13:18:56 +0800 | [diff] [blame] | 3328 | __free_page(vmx_msr_bitmap); |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 3329 | __free_page(vmx_io_bitmap_b); |
| 3330 | __free_page(vmx_io_bitmap_a); |
| 3331 | |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 3332 | kvm_exit(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3333 | } |
| 3334 | |
| 3335 | module_init(vmx_init) |
| 3336 | module_exit(vmx_exit) |