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 | |
| 18 | #include "kvm.h" |
Zhang Xiantao | 34c16ee | 2007-10-20 15:34:38 +0800 | [diff] [blame] | 19 | #include "x86.h" |
Laurent Vivier | e7d5d76 | 2007-07-30 13:41:19 +0300 | [diff] [blame] | 20 | #include "x86_emulate.h" |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 21 | #include "irq.h" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 22 | #include "vmx.h" |
Avi Kivity | e495606 | 2007-06-28 14:15:57 -0400 | [diff] [blame] | 23 | #include "segment_descriptor.h" |
| 24 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 25 | #include <linux/module.h> |
Ahmed S. Darwish | 9d8f549 | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 26 | #include <linux/kernel.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 27 | #include <linux/mm.h> |
| 28 | #include <linux/highmem.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 29 | #include <linux/sched.h> |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame] | 30 | #include <linux/moduleparam.h> |
Avi Kivity | e495606 | 2007-06-28 14:15:57 -0400 | [diff] [blame] | 31 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 32 | #include <asm/io.h> |
Anthony Liguori | 3b3be0d | 2006-12-13 00:33:43 -0800 | [diff] [blame] | 33 | #include <asm/desc.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 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 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 41 | struct vmcs { |
| 42 | u32 revision_id; |
| 43 | u32 abort; |
| 44 | char data[0]; |
| 45 | }; |
| 46 | |
| 47 | struct vcpu_vmx { |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 48 | struct kvm_vcpu vcpu; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 49 | int launched; |
Avi Kivity | 29bd8a7 | 2007-09-10 17:27:03 +0300 | [diff] [blame] | 50 | u8 fail; |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame^] | 51 | u32 idt_vectoring_info; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 52 | struct kvm_msr_entry *guest_msrs; |
| 53 | struct kvm_msr_entry *host_msrs; |
| 54 | int nmsrs; |
| 55 | int save_nmsrs; |
| 56 | int msr_offset_efer; |
| 57 | #ifdef CONFIG_X86_64 |
| 58 | int msr_offset_kernel_gs_base; |
| 59 | #endif |
| 60 | struct vmcs *vmcs; |
| 61 | struct { |
| 62 | int loaded; |
| 63 | u16 fs_sel, gs_sel, ldt_sel; |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 64 | int gs_ldt_reload_needed; |
| 65 | int fs_reload_needed; |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 66 | int guest_efer_loaded; |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 67 | } host_state; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 68 | |
| 69 | }; |
| 70 | |
| 71 | static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu) |
| 72 | { |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 73 | return container_of(vcpu, struct vcpu_vmx, vcpu); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 74 | } |
| 75 | |
Avi Kivity | 75880a0 | 2007-06-20 11:20:04 +0300 | [diff] [blame] | 76 | static int init_rmode_tss(struct kvm *kvm); |
| 77 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 78 | static DEFINE_PER_CPU(struct vmcs *, vmxarea); |
| 79 | static DEFINE_PER_CPU(struct vmcs *, current_vmcs); |
| 80 | |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 81 | static struct page *vmx_io_bitmap_a; |
| 82 | static struct page *vmx_io_bitmap_b; |
| 83 | |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 84 | static struct vmcs_config { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 85 | int size; |
| 86 | int order; |
| 87 | u32 revision_id; |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 88 | u32 pin_based_exec_ctrl; |
| 89 | u32 cpu_based_exec_ctrl; |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 90 | u32 cpu_based_2nd_exec_ctrl; |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 91 | u32 vmexit_ctrl; |
| 92 | u32 vmentry_ctrl; |
| 93 | } vmcs_config; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 94 | |
| 95 | #define VMX_SEGMENT_FIELD(seg) \ |
| 96 | [VCPU_SREG_##seg] = { \ |
| 97 | .selector = GUEST_##seg##_SELECTOR, \ |
| 98 | .base = GUEST_##seg##_BASE, \ |
| 99 | .limit = GUEST_##seg##_LIMIT, \ |
| 100 | .ar_bytes = GUEST_##seg##_AR_BYTES, \ |
| 101 | } |
| 102 | |
| 103 | static struct kvm_vmx_segment_field { |
| 104 | unsigned selector; |
| 105 | unsigned base; |
| 106 | unsigned limit; |
| 107 | unsigned ar_bytes; |
| 108 | } kvm_vmx_segment_fields[] = { |
| 109 | VMX_SEGMENT_FIELD(CS), |
| 110 | VMX_SEGMENT_FIELD(DS), |
| 111 | VMX_SEGMENT_FIELD(ES), |
| 112 | VMX_SEGMENT_FIELD(FS), |
| 113 | VMX_SEGMENT_FIELD(GS), |
| 114 | VMX_SEGMENT_FIELD(SS), |
| 115 | VMX_SEGMENT_FIELD(TR), |
| 116 | VMX_SEGMENT_FIELD(LDTR), |
| 117 | }; |
| 118 | |
Avi Kivity | 4d56c8a | 2007-04-19 14:28:44 +0300 | [diff] [blame] | 119 | /* |
| 120 | * Keep MSR_K6_STAR at the end, as setup_msrs() will try to optimize it |
| 121 | * away by decrementing the array size. |
| 122 | */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 123 | static const u32 vmx_msr_index[] = { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 124 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 125 | MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, MSR_KERNEL_GS_BASE, |
| 126 | #endif |
| 127 | MSR_EFER, MSR_K6_STAR, |
| 128 | }; |
Ahmed S. Darwish | 9d8f549 | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 129 | #define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 130 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 131 | static void load_msrs(struct kvm_msr_entry *e, int n) |
| 132 | { |
| 133 | int i; |
| 134 | |
| 135 | for (i = 0; i < n; ++i) |
| 136 | wrmsrl(e[i].index, e[i].data); |
| 137 | } |
| 138 | |
| 139 | static void save_msrs(struct kvm_msr_entry *e, int n) |
| 140 | { |
| 141 | int i; |
| 142 | |
| 143 | for (i = 0; i < n; ++i) |
| 144 | rdmsrl(e[i].index, e[i].data); |
| 145 | } |
| 146 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 147 | static inline int is_page_fault(u32 intr_info) |
| 148 | { |
| 149 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | |
| 150 | INTR_INFO_VALID_MASK)) == |
| 151 | (INTR_TYPE_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK); |
| 152 | } |
| 153 | |
Anthony Liguori | 2ab455c | 2007-04-27 09:29:49 +0300 | [diff] [blame] | 154 | static inline int is_no_device(u32 intr_info) |
| 155 | { |
| 156 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | |
| 157 | INTR_INFO_VALID_MASK)) == |
| 158 | (INTR_TYPE_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK); |
| 159 | } |
| 160 | |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 161 | static inline int is_invalid_opcode(u32 intr_info) |
| 162 | { |
| 163 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | |
| 164 | INTR_INFO_VALID_MASK)) == |
| 165 | (INTR_TYPE_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK); |
| 166 | } |
| 167 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 168 | static inline int is_external_interrupt(u32 intr_info) |
| 169 | { |
| 170 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) |
| 171 | == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); |
| 172 | } |
| 173 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 174 | static inline int cpu_has_vmx_tpr_shadow(void) |
| 175 | { |
| 176 | return (vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW); |
| 177 | } |
| 178 | |
| 179 | static inline int vm_need_tpr_shadow(struct kvm *kvm) |
| 180 | { |
| 181 | return ((cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm))); |
| 182 | } |
| 183 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 184 | static inline int cpu_has_secondary_exec_ctrls(void) |
| 185 | { |
| 186 | return (vmcs_config.cpu_based_exec_ctrl & |
| 187 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS); |
| 188 | } |
| 189 | |
| 190 | static inline int vm_need_secondary_exec_ctrls(struct kvm *kvm) |
| 191 | { |
| 192 | return ((cpu_has_secondary_exec_ctrls()) && (irqchip_in_kernel(kvm))); |
| 193 | } |
| 194 | |
| 195 | static inline int cpu_has_vmx_virtualize_apic_accesses(void) |
| 196 | { |
| 197 | return (vmcs_config.cpu_based_2nd_exec_ctrl & |
| 198 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES); |
| 199 | } |
| 200 | |
| 201 | static inline int vm_need_virtualize_apic_accesses(struct kvm *kvm) |
| 202 | { |
| 203 | return ((cpu_has_vmx_virtualize_apic_accesses()) && |
| 204 | (irqchip_in_kernel(kvm))); |
| 205 | } |
| 206 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 207 | static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr) |
Avi Kivity | 7725f0b | 2006-12-13 00:34:01 -0800 | [diff] [blame] | 208 | { |
| 209 | int i; |
| 210 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 211 | for (i = 0; i < vmx->nmsrs; ++i) |
| 212 | if (vmx->guest_msrs[i].index == msr) |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 213 | return i; |
| 214 | return -1; |
| 215 | } |
| 216 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 217 | 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] | 218 | { |
| 219 | int i; |
| 220 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 221 | i = __find_msr_index(vmx, msr); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 222 | if (i >= 0) |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 223 | return &vmx->guest_msrs[i]; |
Al Viro | 8b6d44c | 2007-02-09 16:38:40 +0000 | [diff] [blame] | 224 | return NULL; |
Avi Kivity | 7725f0b | 2006-12-13 00:34:01 -0800 | [diff] [blame] | 225 | } |
| 226 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 227 | static void vmcs_clear(struct vmcs *vmcs) |
| 228 | { |
| 229 | u64 phys_addr = __pa(vmcs); |
| 230 | u8 error; |
| 231 | |
| 232 | asm volatile (ASM_VMX_VMCLEAR_RAX "; setna %0" |
| 233 | : "=g"(error) : "a"(&phys_addr), "m"(phys_addr) |
| 234 | : "cc", "memory"); |
| 235 | if (error) |
| 236 | printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n", |
| 237 | vmcs, phys_addr); |
| 238 | } |
| 239 | |
| 240 | static void __vcpu_clear(void *arg) |
| 241 | { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 242 | struct vcpu_vmx *vmx = arg; |
Ingo Molnar | d3b2c33 | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 243 | int cpu = raw_smp_processor_id(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 244 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 245 | if (vmx->vcpu.cpu == cpu) |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 246 | vmcs_clear(vmx->vmcs); |
| 247 | if (per_cpu(current_vmcs, cpu) == vmx->vmcs) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 248 | per_cpu(current_vmcs, cpu) = NULL; |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 249 | rdtscll(vmx->vcpu.host_tsc); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 250 | } |
| 251 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 252 | static void vcpu_clear(struct vcpu_vmx *vmx) |
Avi Kivity | 8d0be2b | 2007-02-12 00:54:46 -0800 | [diff] [blame] | 253 | { |
Avi Kivity | eae5ecb | 2007-09-30 10:50:12 +0200 | [diff] [blame] | 254 | if (vmx->vcpu.cpu == -1) |
| 255 | return; |
Avi Kivity | f566e09 | 2007-09-30 11:02:53 +0200 | [diff] [blame] | 256 | smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 0, 1); |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 257 | vmx->launched = 0; |
Avi Kivity | 8d0be2b | 2007-02-12 00:54:46 -0800 | [diff] [blame] | 258 | } |
| 259 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 260 | static unsigned long vmcs_readl(unsigned long field) |
| 261 | { |
| 262 | unsigned long value; |
| 263 | |
| 264 | asm volatile (ASM_VMX_VMREAD_RDX_RAX |
| 265 | : "=a"(value) : "d"(field) : "cc"); |
| 266 | return value; |
| 267 | } |
| 268 | |
| 269 | static u16 vmcs_read16(unsigned long field) |
| 270 | { |
| 271 | return vmcs_readl(field); |
| 272 | } |
| 273 | |
| 274 | static u32 vmcs_read32(unsigned long field) |
| 275 | { |
| 276 | return vmcs_readl(field); |
| 277 | } |
| 278 | |
| 279 | static u64 vmcs_read64(unsigned long field) |
| 280 | { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 281 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 282 | return vmcs_readl(field); |
| 283 | #else |
| 284 | return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32); |
| 285 | #endif |
| 286 | } |
| 287 | |
Avi Kivity | e52de1b | 2007-01-05 16:36:56 -0800 | [diff] [blame] | 288 | static noinline void vmwrite_error(unsigned long field, unsigned long value) |
| 289 | { |
| 290 | printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n", |
| 291 | field, value, vmcs_read32(VM_INSTRUCTION_ERROR)); |
| 292 | dump_stack(); |
| 293 | } |
| 294 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 295 | static void vmcs_writel(unsigned long field, unsigned long value) |
| 296 | { |
| 297 | u8 error; |
| 298 | |
| 299 | asm volatile (ASM_VMX_VMWRITE_RAX_RDX "; setna %0" |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 300 | : "=q"(error) : "a"(value), "d"(field) : "cc"); |
Avi Kivity | e52de1b | 2007-01-05 16:36:56 -0800 | [diff] [blame] | 301 | if (unlikely(error)) |
| 302 | vmwrite_error(field, value); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 303 | } |
| 304 | |
| 305 | static void vmcs_write16(unsigned long field, u16 value) |
| 306 | { |
| 307 | vmcs_writel(field, value); |
| 308 | } |
| 309 | |
| 310 | static void vmcs_write32(unsigned long field, u32 value) |
| 311 | { |
| 312 | vmcs_writel(field, value); |
| 313 | } |
| 314 | |
| 315 | static void vmcs_write64(unsigned long field, u64 value) |
| 316 | { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 317 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 318 | vmcs_writel(field, value); |
| 319 | #else |
| 320 | vmcs_writel(field, value); |
| 321 | asm volatile (""); |
| 322 | vmcs_writel(field+1, value >> 32); |
| 323 | #endif |
| 324 | } |
| 325 | |
Anthony Liguori | 2ab455c | 2007-04-27 09:29:49 +0300 | [diff] [blame] | 326 | static void vmcs_clear_bits(unsigned long field, u32 mask) |
| 327 | { |
| 328 | vmcs_writel(field, vmcs_readl(field) & ~mask); |
| 329 | } |
| 330 | |
| 331 | static void vmcs_set_bits(unsigned long field, u32 mask) |
| 332 | { |
| 333 | vmcs_writel(field, vmcs_readl(field) | mask); |
| 334 | } |
| 335 | |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 336 | static void update_exception_bitmap(struct kvm_vcpu *vcpu) |
| 337 | { |
| 338 | u32 eb; |
| 339 | |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 340 | eb = (1u << PF_VECTOR) | (1u << UD_VECTOR); |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 341 | if (!vcpu->fpu_active) |
| 342 | eb |= 1u << NM_VECTOR; |
| 343 | if (vcpu->guest_debug.enabled) |
| 344 | eb |= 1u << 1; |
| 345 | if (vcpu->rmode.active) |
| 346 | eb = ~0; |
| 347 | vmcs_write32(EXCEPTION_BITMAP, eb); |
| 348 | } |
| 349 | |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 350 | static void reload_tss(void) |
| 351 | { |
| 352 | #ifndef CONFIG_X86_64 |
| 353 | |
| 354 | /* |
| 355 | * VT restores TR but not its size. Useless. |
| 356 | */ |
| 357 | struct descriptor_table gdt; |
| 358 | struct segment_descriptor *descs; |
| 359 | |
| 360 | get_gdt(&gdt); |
| 361 | descs = (void *)gdt.base; |
| 362 | descs[GDT_ENTRY_TSS].type = 9; /* available TSS */ |
| 363 | load_TR_desc(); |
| 364 | #endif |
| 365 | } |
| 366 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 367 | static void load_transition_efer(struct vcpu_vmx *vmx) |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 368 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 369 | int efer_offset = vmx->msr_offset_efer; |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 370 | u64 host_efer = vmx->host_msrs[efer_offset].data; |
| 371 | u64 guest_efer = vmx->guest_msrs[efer_offset].data; |
| 372 | u64 ignore_bits; |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 373 | |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 374 | if (efer_offset < 0) |
| 375 | return; |
| 376 | /* |
| 377 | * NX is emulated; LMA and LME handled by hardware; SCE meaninless |
| 378 | * outside long mode |
| 379 | */ |
| 380 | ignore_bits = EFER_NX | EFER_SCE; |
| 381 | #ifdef CONFIG_X86_64 |
| 382 | ignore_bits |= EFER_LMA | EFER_LME; |
| 383 | /* SCE is meaningful only in long mode on Intel */ |
| 384 | if (guest_efer & EFER_LMA) |
| 385 | ignore_bits &= ~(u64)EFER_SCE; |
| 386 | #endif |
| 387 | if ((guest_efer & ~ignore_bits) == (host_efer & ~ignore_bits)) |
| 388 | return; |
| 389 | |
| 390 | vmx->host_state.guest_efer_loaded = 1; |
| 391 | guest_efer &= ~ignore_bits; |
| 392 | guest_efer |= host_efer & ignore_bits; |
| 393 | wrmsrl(MSR_EFER, guest_efer); |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 394 | vmx->vcpu.stat.efer_reload++; |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 395 | } |
| 396 | |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 397 | static void reload_host_efer(struct vcpu_vmx *vmx) |
| 398 | { |
| 399 | if (vmx->host_state.guest_efer_loaded) { |
| 400 | vmx->host_state.guest_efer_loaded = 0; |
| 401 | load_msrs(vmx->host_msrs + vmx->msr_offset_efer, 1); |
| 402 | } |
| 403 | } |
| 404 | |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 405 | static void vmx_save_host_state(struct kvm_vcpu *vcpu) |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 406 | { |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 407 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 408 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 409 | if (vmx->host_state.loaded) |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 410 | return; |
| 411 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 412 | vmx->host_state.loaded = 1; |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 413 | /* |
| 414 | * Set host fs and gs selectors. Unfortunately, 22.2.3 does not |
| 415 | * allow segment selectors with cpl > 0 or ti == 1. |
| 416 | */ |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 417 | vmx->host_state.ldt_sel = read_ldt(); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 418 | vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 419 | vmx->host_state.fs_sel = read_fs(); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 420 | if (!(vmx->host_state.fs_sel & 7)) { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 421 | vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 422 | vmx->host_state.fs_reload_needed = 0; |
| 423 | } else { |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 424 | vmcs_write16(HOST_FS_SELECTOR, 0); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 425 | vmx->host_state.fs_reload_needed = 1; |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 426 | } |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 427 | vmx->host_state.gs_sel = read_gs(); |
| 428 | if (!(vmx->host_state.gs_sel & 7)) |
| 429 | vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 430 | else { |
| 431 | vmcs_write16(HOST_GS_SELECTOR, 0); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 432 | vmx->host_state.gs_ldt_reload_needed = 1; |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 433 | } |
| 434 | |
| 435 | #ifdef CONFIG_X86_64 |
| 436 | vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE)); |
| 437 | vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE)); |
| 438 | #else |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 439 | vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel)); |
| 440 | vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel)); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 441 | #endif |
Avi Kivity | 707c087 | 2007-05-02 17:33:43 +0300 | [diff] [blame] | 442 | |
| 443 | #ifdef CONFIG_X86_64 |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 444 | if (is_long_mode(&vmx->vcpu)) |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 445 | save_msrs(vmx->host_msrs + |
| 446 | vmx->msr_offset_kernel_gs_base, 1); |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 447 | |
Avi Kivity | 707c087 | 2007-05-02 17:33:43 +0300 | [diff] [blame] | 448 | #endif |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 449 | load_msrs(vmx->guest_msrs, vmx->save_nmsrs); |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 450 | load_transition_efer(vmx); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 451 | } |
| 452 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 453 | static void vmx_load_host_state(struct vcpu_vmx *vmx) |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 454 | { |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 455 | unsigned long flags; |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 456 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 457 | if (!vmx->host_state.loaded) |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 458 | return; |
| 459 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 460 | vmx->host_state.loaded = 0; |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 461 | if (vmx->host_state.fs_reload_needed) |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 462 | load_fs(vmx->host_state.fs_sel); |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 463 | if (vmx->host_state.gs_ldt_reload_needed) { |
| 464 | load_ldt(vmx->host_state.ldt_sel); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 465 | /* |
| 466 | * If we have to reload gs, we must take care to |
| 467 | * preserve our gs base. |
| 468 | */ |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 469 | local_irq_save(flags); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 470 | load_gs(vmx->host_state.gs_sel); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 471 | #ifdef CONFIG_X86_64 |
| 472 | wrmsrl(MSR_GS_BASE, vmcs_readl(HOST_GS_BASE)); |
| 473 | #endif |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 474 | local_irq_restore(flags); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 475 | } |
Laurent Vivier | 152d3f2 | 2007-08-23 16:33:11 +0200 | [diff] [blame] | 476 | reload_tss(); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 477 | save_msrs(vmx->guest_msrs, vmx->save_nmsrs); |
| 478 | load_msrs(vmx->host_msrs, vmx->save_nmsrs); |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 479 | reload_host_efer(vmx); |
Avi Kivity | 33ed632 | 2007-05-02 16:54:03 +0300 | [diff] [blame] | 480 | } |
| 481 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 482 | /* |
| 483 | * Switches to specified vcpu, until a matching vcpu_put(), but assumes |
| 484 | * vcpu mutex is already taken. |
| 485 | */ |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 486 | static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 487 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 488 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 489 | u64 phys_addr = __pa(vmx->vmcs); |
Avi Kivity | 7700270 | 2007-06-13 19:55:28 +0300 | [diff] [blame] | 490 | u64 tsc_this, delta; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 491 | |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 492 | if (vcpu->cpu != cpu) { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 493 | vcpu_clear(vmx); |
Eddie Dong | a3d7f85 | 2007-09-03 16:15:12 +0300 | [diff] [blame] | 494 | kvm_migrate_apic_timer(vcpu); |
| 495 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 496 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 497 | if (per_cpu(current_vmcs, cpu) != vmx->vmcs) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 498 | u8 error; |
| 499 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 500 | per_cpu(current_vmcs, cpu) = vmx->vmcs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 501 | asm volatile (ASM_VMX_VMPTRLD_RAX "; setna %0" |
| 502 | : "=g"(error) : "a"(&phys_addr), "m"(phys_addr) |
| 503 | : "cc"); |
| 504 | if (error) |
| 505 | printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n", |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 506 | vmx->vmcs, phys_addr); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 507 | } |
| 508 | |
| 509 | if (vcpu->cpu != cpu) { |
| 510 | struct descriptor_table dt; |
| 511 | unsigned long sysenter_esp; |
| 512 | |
| 513 | vcpu->cpu = cpu; |
| 514 | /* |
| 515 | * Linux uses per-cpu TSS and GDT, so set these when switching |
| 516 | * processors. |
| 517 | */ |
| 518 | vmcs_writel(HOST_TR_BASE, read_tr_base()); /* 22.2.4 */ |
| 519 | get_gdt(&dt); |
| 520 | vmcs_writel(HOST_GDTR_BASE, dt.base); /* 22.2.4 */ |
| 521 | |
| 522 | rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp); |
| 523 | vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */ |
Avi Kivity | 7700270 | 2007-06-13 19:55:28 +0300 | [diff] [blame] | 524 | |
| 525 | /* |
| 526 | * Make sure the time stamp counter is monotonous. |
| 527 | */ |
| 528 | rdtscll(tsc_this); |
| 529 | delta = vcpu->host_tsc - tsc_this; |
| 530 | vmcs_write64(TSC_OFFSET, vmcs_read64(TSC_OFFSET) + delta); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 531 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 532 | } |
| 533 | |
| 534 | static void vmx_vcpu_put(struct kvm_vcpu *vcpu) |
| 535 | { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 536 | vmx_load_host_state(to_vmx(vcpu)); |
Avi Kivity | 7702fd1 | 2007-06-14 16:27:40 +0300 | [diff] [blame] | 537 | kvm_put_guest_fpu(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 538 | } |
| 539 | |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 540 | static void vmx_fpu_activate(struct kvm_vcpu *vcpu) |
| 541 | { |
| 542 | if (vcpu->fpu_active) |
| 543 | return; |
| 544 | vcpu->fpu_active = 1; |
Rusty Russell | 707d92f | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 545 | vmcs_clear_bits(GUEST_CR0, X86_CR0_TS); |
| 546 | if (vcpu->cr0 & X86_CR0_TS) |
| 547 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS); |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 548 | update_exception_bitmap(vcpu); |
| 549 | } |
| 550 | |
| 551 | static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu) |
| 552 | { |
| 553 | if (!vcpu->fpu_active) |
| 554 | return; |
| 555 | vcpu->fpu_active = 0; |
Rusty Russell | 707d92f | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 556 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS); |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 557 | update_exception_bitmap(vcpu); |
| 558 | } |
| 559 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 560 | static void vmx_vcpu_decache(struct kvm_vcpu *vcpu) |
| 561 | { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 562 | vcpu_clear(to_vmx(vcpu)); |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 563 | } |
| 564 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 565 | static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu) |
| 566 | { |
| 567 | return vmcs_readl(GUEST_RFLAGS); |
| 568 | } |
| 569 | |
| 570 | static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) |
| 571 | { |
Avi Kivity | 78f7826868 | 2007-10-16 19:06:15 +0200 | [diff] [blame] | 572 | if (vcpu->rmode.active) |
Glauber de Oliveira Costa | 053de04 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 573 | rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 574 | vmcs_writel(GUEST_RFLAGS, rflags); |
| 575 | } |
| 576 | |
| 577 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) |
| 578 | { |
| 579 | unsigned long rip; |
| 580 | u32 interruptibility; |
| 581 | |
| 582 | rip = vmcs_readl(GUEST_RIP); |
| 583 | rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN); |
| 584 | vmcs_writel(GUEST_RIP, rip); |
| 585 | |
| 586 | /* |
| 587 | * We emulated an instruction, so temporary interrupt blocking |
| 588 | * should be removed, if set. |
| 589 | */ |
| 590 | interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); |
| 591 | if (interruptibility & 3) |
| 592 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, |
| 593 | interruptibility & ~3); |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 594 | vcpu->interrupt_window_open = 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 595 | } |
| 596 | |
| 597 | static void vmx_inject_gp(struct kvm_vcpu *vcpu, unsigned error_code) |
| 598 | { |
| 599 | printk(KERN_DEBUG "inject_general_protection: rip 0x%lx\n", |
| 600 | vmcs_readl(GUEST_RIP)); |
| 601 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code); |
| 602 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
| 603 | GP_VECTOR | |
| 604 | INTR_TYPE_EXCEPTION | |
| 605 | INTR_INFO_DELIEVER_CODE_MASK | |
| 606 | INTR_INFO_VALID_MASK); |
| 607 | } |
| 608 | |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 609 | static void vmx_inject_ud(struct kvm_vcpu *vcpu) |
| 610 | { |
| 611 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
| 612 | UD_VECTOR | |
| 613 | INTR_TYPE_EXCEPTION | |
| 614 | INTR_INFO_VALID_MASK); |
| 615 | } |
| 616 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 617 | /* |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 618 | * Swap MSR entry in host/guest MSR entry array. |
| 619 | */ |
Gabriel C | 54e11fa | 2007-08-01 16:23:10 +0200 | [diff] [blame] | 620 | #ifdef CONFIG_X86_64 |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 621 | 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] | 622 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 623 | struct kvm_msr_entry tmp; |
| 624 | |
| 625 | tmp = vmx->guest_msrs[to]; |
| 626 | vmx->guest_msrs[to] = vmx->guest_msrs[from]; |
| 627 | vmx->guest_msrs[from] = tmp; |
| 628 | tmp = vmx->host_msrs[to]; |
| 629 | vmx->host_msrs[to] = vmx->host_msrs[from]; |
| 630 | vmx->host_msrs[from] = tmp; |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 631 | } |
Gabriel C | 54e11fa | 2007-08-01 16:23:10 +0200 | [diff] [blame] | 632 | #endif |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 633 | |
| 634 | /* |
Avi Kivity | e38aea3 | 2007-04-19 13:22:48 +0300 | [diff] [blame] | 635 | * Set up the vmcs to automatically save and restore system |
| 636 | * msrs. Don't touch the 64-bit msrs if the guest is in legacy |
| 637 | * mode, as fiddling with msrs is very expensive. |
| 638 | */ |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 639 | static void setup_msrs(struct vcpu_vmx *vmx) |
Avi Kivity | e38aea3 | 2007-04-19 13:22:48 +0300 | [diff] [blame] | 640 | { |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 641 | int save_nmsrs; |
Avi Kivity | e38aea3 | 2007-04-19 13:22:48 +0300 | [diff] [blame] | 642 | |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 643 | save_nmsrs = 0; |
Avi Kivity | 4d56c8a | 2007-04-19 14:28:44 +0300 | [diff] [blame] | 644 | #ifdef CONFIG_X86_64 |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 645 | if (is_long_mode(&vmx->vcpu)) { |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 646 | int index; |
| 647 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 648 | index = __find_msr_index(vmx, MSR_SYSCALL_MASK); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 649 | if (index >= 0) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 650 | move_msr_up(vmx, index, save_nmsrs++); |
| 651 | index = __find_msr_index(vmx, MSR_LSTAR); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 652 | if (index >= 0) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 653 | move_msr_up(vmx, index, save_nmsrs++); |
| 654 | index = __find_msr_index(vmx, MSR_CSTAR); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 655 | if (index >= 0) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 656 | move_msr_up(vmx, index, save_nmsrs++); |
| 657 | index = __find_msr_index(vmx, MSR_KERNEL_GS_BASE); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 658 | if (index >= 0) |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 659 | move_msr_up(vmx, index, save_nmsrs++); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 660 | /* |
| 661 | * MSR_K6_STAR is only needed on long mode guests, and only |
| 662 | * if efer.sce is enabled. |
| 663 | */ |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 664 | index = __find_msr_index(vmx, MSR_K6_STAR); |
| 665 | if ((index >= 0) && (vmx->vcpu.shadow_efer & EFER_SCE)) |
| 666 | move_msr_up(vmx, index, save_nmsrs++); |
Avi Kivity | 4d56c8a | 2007-04-19 14:28:44 +0300 | [diff] [blame] | 667 | } |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 668 | #endif |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 669 | vmx->save_nmsrs = save_nmsrs; |
Avi Kivity | 4d56c8a | 2007-04-19 14:28:44 +0300 | [diff] [blame] | 670 | |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 671 | #ifdef CONFIG_X86_64 |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 672 | vmx->msr_offset_kernel_gs_base = |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 673 | __find_msr_index(vmx, MSR_KERNEL_GS_BASE); |
Eddie Dong | a75beee | 2007-05-17 18:55:15 +0300 | [diff] [blame] | 674 | #endif |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 675 | vmx->msr_offset_efer = __find_msr_index(vmx, MSR_EFER); |
Avi Kivity | e38aea3 | 2007-04-19 13:22:48 +0300 | [diff] [blame] | 676 | } |
| 677 | |
| 678 | /* |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 679 | * reads and returns guest's timestamp counter "register" |
| 680 | * guest_tsc = host_tsc + tsc_offset -- 21.3 |
| 681 | */ |
| 682 | static u64 guest_read_tsc(void) |
| 683 | { |
| 684 | u64 host_tsc, tsc_offset; |
| 685 | |
| 686 | rdtscll(host_tsc); |
| 687 | tsc_offset = vmcs_read64(TSC_OFFSET); |
| 688 | return host_tsc + tsc_offset; |
| 689 | } |
| 690 | |
| 691 | /* |
| 692 | * writes 'guest_tsc' into guest's timestamp counter "register" |
| 693 | * guest_tsc = host_tsc + tsc_offset ==> tsc_offset = guest_tsc - host_tsc |
| 694 | */ |
| 695 | static void guest_write_tsc(u64 guest_tsc) |
| 696 | { |
| 697 | u64 host_tsc; |
| 698 | |
| 699 | rdtscll(host_tsc); |
| 700 | vmcs_write64(TSC_OFFSET, guest_tsc - host_tsc); |
| 701 | } |
| 702 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 703 | /* |
| 704 | * Reads an msr value (of 'msr_index') into 'pdata'. |
| 705 | * Returns 0 on success, non-0 otherwise. |
| 706 | * Assumes vcpu_load() was already called. |
| 707 | */ |
| 708 | static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) |
| 709 | { |
| 710 | u64 data; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 711 | struct kvm_msr_entry *msr; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 712 | |
| 713 | if (!pdata) { |
| 714 | printk(KERN_ERR "BUG: get_msr called with NULL pdata\n"); |
| 715 | return -EINVAL; |
| 716 | } |
| 717 | |
| 718 | switch (msr_index) { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 719 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 720 | case MSR_FS_BASE: |
| 721 | data = vmcs_readl(GUEST_FS_BASE); |
| 722 | break; |
| 723 | case MSR_GS_BASE: |
| 724 | data = vmcs_readl(GUEST_GS_BASE); |
| 725 | break; |
| 726 | case MSR_EFER: |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 727 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 728 | #endif |
| 729 | case MSR_IA32_TIME_STAMP_COUNTER: |
| 730 | data = guest_read_tsc(); |
| 731 | break; |
| 732 | case MSR_IA32_SYSENTER_CS: |
| 733 | data = vmcs_read32(GUEST_SYSENTER_CS); |
| 734 | break; |
| 735 | case MSR_IA32_SYSENTER_EIP: |
Avi Kivity | f5b42c3 | 2007-03-06 12:05:53 +0200 | [diff] [blame] | 736 | data = vmcs_readl(GUEST_SYSENTER_EIP); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 737 | break; |
| 738 | case MSR_IA32_SYSENTER_ESP: |
Avi Kivity | f5b42c3 | 2007-03-06 12:05:53 +0200 | [diff] [blame] | 739 | data = vmcs_readl(GUEST_SYSENTER_ESP); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 740 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 741 | default: |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 742 | msr = find_msr_entry(to_vmx(vcpu), msr_index); |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 743 | if (msr) { |
| 744 | data = msr->data; |
| 745 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 746 | } |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 747 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 748 | } |
| 749 | |
| 750 | *pdata = data; |
| 751 | return 0; |
| 752 | } |
| 753 | |
| 754 | /* |
| 755 | * Writes msr value into into the appropriate "register". |
| 756 | * Returns 0 on success, non-0 otherwise. |
| 757 | * Assumes vcpu_load() was already called. |
| 758 | */ |
| 759 | static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) |
| 760 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 761 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 762 | struct kvm_msr_entry *msr; |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 763 | int ret = 0; |
| 764 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 765 | switch (msr_index) { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 766 | #ifdef CONFIG_X86_64 |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 767 | case MSR_EFER: |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 768 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 769 | if (vmx->host_state.loaded) { |
| 770 | reload_host_efer(vmx); |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 771 | load_transition_efer(vmx); |
Avi Kivity | 51c6cf6 | 2007-08-29 03:48:05 +0300 | [diff] [blame] | 772 | } |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 773 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 774 | case MSR_FS_BASE: |
| 775 | vmcs_writel(GUEST_FS_BASE, data); |
| 776 | break; |
| 777 | case MSR_GS_BASE: |
| 778 | vmcs_writel(GUEST_GS_BASE, data); |
| 779 | break; |
| 780 | #endif |
| 781 | case MSR_IA32_SYSENTER_CS: |
| 782 | vmcs_write32(GUEST_SYSENTER_CS, data); |
| 783 | break; |
| 784 | case MSR_IA32_SYSENTER_EIP: |
Avi Kivity | f5b42c3 | 2007-03-06 12:05:53 +0200 | [diff] [blame] | 785 | vmcs_writel(GUEST_SYSENTER_EIP, data); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 786 | break; |
| 787 | case MSR_IA32_SYSENTER_ESP: |
Avi Kivity | f5b42c3 | 2007-03-06 12:05:53 +0200 | [diff] [blame] | 788 | vmcs_writel(GUEST_SYSENTER_ESP, data); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 789 | break; |
Avi Kivity | d27d4ac | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 790 | case MSR_IA32_TIME_STAMP_COUNTER: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 791 | guest_write_tsc(data); |
| 792 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 793 | default: |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 794 | msr = find_msr_entry(vmx, msr_index); |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 795 | if (msr) { |
| 796 | msr->data = data; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 797 | if (vmx->host_state.loaded) |
| 798 | load_msrs(vmx->guest_msrs, vmx->save_nmsrs); |
Avi Kivity | 3bab1f5 | 2006-12-29 16:49:48 -0800 | [diff] [blame] | 799 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 800 | } |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 801 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 802 | } |
| 803 | |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 804 | return ret; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 805 | } |
| 806 | |
| 807 | /* |
| 808 | * Sync the rsp and rip registers into the vcpu structure. This allows |
| 809 | * registers to be accessed by indexing vcpu->regs. |
| 810 | */ |
| 811 | static void vcpu_load_rsp_rip(struct kvm_vcpu *vcpu) |
| 812 | { |
| 813 | vcpu->regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP); |
| 814 | vcpu->rip = vmcs_readl(GUEST_RIP); |
| 815 | } |
| 816 | |
| 817 | /* |
| 818 | * Syncs rsp and rip back into the vmcs. Should be called after possible |
| 819 | * modification. |
| 820 | */ |
| 821 | static void vcpu_put_rsp_rip(struct kvm_vcpu *vcpu) |
| 822 | { |
| 823 | vmcs_writel(GUEST_RSP, vcpu->regs[VCPU_REGS_RSP]); |
| 824 | vmcs_writel(GUEST_RIP, vcpu->rip); |
| 825 | } |
| 826 | |
| 827 | static int set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg) |
| 828 | { |
| 829 | unsigned long dr7 = 0x400; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 830 | int old_singlestep; |
| 831 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 832 | old_singlestep = vcpu->guest_debug.singlestep; |
| 833 | |
| 834 | vcpu->guest_debug.enabled = dbg->enabled; |
| 835 | if (vcpu->guest_debug.enabled) { |
| 836 | int i; |
| 837 | |
| 838 | dr7 |= 0x200; /* exact */ |
| 839 | for (i = 0; i < 4; ++i) { |
| 840 | if (!dbg->breakpoints[i].enabled) |
| 841 | continue; |
| 842 | vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address; |
| 843 | dr7 |= 2 << (i*2); /* global enable */ |
| 844 | dr7 |= 0 << (i*4+16); /* execution breakpoint */ |
| 845 | } |
| 846 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 847 | vcpu->guest_debug.singlestep = dbg->singlestep; |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 848 | } else |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 849 | vcpu->guest_debug.singlestep = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 850 | |
| 851 | if (old_singlestep && !vcpu->guest_debug.singlestep) { |
| 852 | unsigned long flags; |
| 853 | |
| 854 | flags = vmcs_readl(GUEST_RFLAGS); |
| 855 | flags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); |
| 856 | vmcs_writel(GUEST_RFLAGS, flags); |
| 857 | } |
| 858 | |
Avi Kivity | abd3f2d | 2007-05-02 17:57:40 +0300 | [diff] [blame] | 859 | update_exception_bitmap(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 860 | vmcs_writel(GUEST_DR7, dr7); |
| 861 | |
| 862 | return 0; |
| 863 | } |
| 864 | |
Eddie Dong | 2a8067f | 2007-08-06 16:29:07 +0300 | [diff] [blame] | 865 | static int vmx_get_irq(struct kvm_vcpu *vcpu) |
| 866 | { |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame^] | 867 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
Eddie Dong | 2a8067f | 2007-08-06 16:29:07 +0300 | [diff] [blame] | 868 | u32 idtv_info_field; |
| 869 | |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame^] | 870 | idtv_info_field = vmx->idt_vectoring_info; |
Eddie Dong | 2a8067f | 2007-08-06 16:29:07 +0300 | [diff] [blame] | 871 | if (idtv_info_field & INTR_INFO_VALID_MASK) { |
| 872 | if (is_external_interrupt(idtv_info_field)) |
| 873 | return idtv_info_field & VECTORING_INFO_VECTOR_MASK; |
| 874 | else |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 875 | printk(KERN_DEBUG "pending exception: not handled yet\n"); |
Eddie Dong | 2a8067f | 2007-08-06 16:29:07 +0300 | [diff] [blame] | 876 | } |
| 877 | return -1; |
| 878 | } |
| 879 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 880 | static __init int cpu_has_kvm_support(void) |
| 881 | { |
| 882 | unsigned long ecx = cpuid_ecx(1); |
| 883 | return test_bit(5, &ecx); /* CPUID.1:ECX.VMX[bit 5] -> VT */ |
| 884 | } |
| 885 | |
| 886 | static __init int vmx_disabled_by_bios(void) |
| 887 | { |
| 888 | u64 msr; |
| 889 | |
| 890 | rdmsrl(MSR_IA32_FEATURE_CONTROL, msr); |
Yang, Sheng | 62b3ffb | 2007-07-25 12:17:06 +0300 | [diff] [blame] | 891 | return (msr & (MSR_IA32_FEATURE_CONTROL_LOCKED | |
| 892 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED)) |
| 893 | == MSR_IA32_FEATURE_CONTROL_LOCKED; |
| 894 | /* locked but not enabled */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 895 | } |
| 896 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 897 | static void hardware_enable(void *garbage) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 898 | { |
| 899 | int cpu = raw_smp_processor_id(); |
| 900 | u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); |
| 901 | u64 old; |
| 902 | |
| 903 | rdmsrl(MSR_IA32_FEATURE_CONTROL, old); |
Yang, Sheng | 62b3ffb | 2007-07-25 12:17:06 +0300 | [diff] [blame] | 904 | if ((old & (MSR_IA32_FEATURE_CONTROL_LOCKED | |
| 905 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED)) |
| 906 | != (MSR_IA32_FEATURE_CONTROL_LOCKED | |
| 907 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 908 | /* enable and lock */ |
Yang, Sheng | 62b3ffb | 2007-07-25 12:17:06 +0300 | [diff] [blame] | 909 | wrmsrl(MSR_IA32_FEATURE_CONTROL, old | |
| 910 | MSR_IA32_FEATURE_CONTROL_LOCKED | |
| 911 | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED); |
Rusty Russell | 66aee91 | 2007-07-17 23:34:16 +1000 | [diff] [blame] | 912 | write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 913 | asm volatile (ASM_VMX_VMXON_RAX : : "a"(&phys_addr), "m"(phys_addr) |
| 914 | : "memory", "cc"); |
| 915 | } |
| 916 | |
| 917 | static void hardware_disable(void *garbage) |
| 918 | { |
| 919 | asm volatile (ASM_VMX_VMXOFF : : : "cc"); |
| 920 | } |
| 921 | |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 922 | static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt, |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 923 | u32 msr, u32 *result) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 924 | { |
| 925 | u32 vmx_msr_low, vmx_msr_high; |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 926 | u32 ctl = ctl_min | ctl_opt; |
| 927 | |
| 928 | rdmsr(msr, vmx_msr_low, vmx_msr_high); |
| 929 | |
| 930 | ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */ |
| 931 | ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */ |
| 932 | |
| 933 | /* Ensure minimum (required) set of control bits are supported. */ |
| 934 | if (ctl_min & ~ctl) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 935 | return -EIO; |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 936 | |
| 937 | *result = ctl; |
| 938 | return 0; |
| 939 | } |
| 940 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 941 | static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 942 | { |
| 943 | u32 vmx_msr_low, vmx_msr_high; |
| 944 | u32 min, opt; |
| 945 | u32 _pin_based_exec_control = 0; |
| 946 | u32 _cpu_based_exec_control = 0; |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 947 | u32 _cpu_based_2nd_exec_control = 0; |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 948 | u32 _vmexit_control = 0; |
| 949 | u32 _vmentry_control = 0; |
| 950 | |
| 951 | min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING; |
| 952 | opt = 0; |
| 953 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS, |
| 954 | &_pin_based_exec_control) < 0) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 955 | return -EIO; |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 956 | |
| 957 | min = CPU_BASED_HLT_EXITING | |
| 958 | #ifdef CONFIG_X86_64 |
| 959 | CPU_BASED_CR8_LOAD_EXITING | |
| 960 | CPU_BASED_CR8_STORE_EXITING | |
| 961 | #endif |
| 962 | CPU_BASED_USE_IO_BITMAPS | |
| 963 | CPU_BASED_MOV_DR_EXITING | |
| 964 | CPU_BASED_USE_TSC_OFFSETING; |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 965 | opt = CPU_BASED_TPR_SHADOW | |
| 966 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 967 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS, |
| 968 | &_cpu_based_exec_control) < 0) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 969 | return -EIO; |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 970 | #ifdef CONFIG_X86_64 |
| 971 | if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)) |
| 972 | _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING & |
| 973 | ~CPU_BASED_CR8_STORE_EXITING; |
| 974 | #endif |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 975 | if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) { |
| 976 | min = 0; |
| 977 | opt = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; |
| 978 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS2, |
| 979 | &_cpu_based_2nd_exec_control) < 0) |
| 980 | return -EIO; |
| 981 | } |
| 982 | #ifndef CONFIG_X86_64 |
| 983 | if (!(_cpu_based_2nd_exec_control & |
| 984 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) |
| 985 | _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW; |
| 986 | #endif |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 987 | |
| 988 | min = 0; |
| 989 | #ifdef CONFIG_X86_64 |
| 990 | min |= VM_EXIT_HOST_ADDR_SPACE_SIZE; |
| 991 | #endif |
| 992 | opt = 0; |
| 993 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS, |
| 994 | &_vmexit_control) < 0) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 995 | return -EIO; |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 996 | |
| 997 | min = opt = 0; |
| 998 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS, |
| 999 | &_vmentry_control) < 0) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1000 | return -EIO; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1001 | |
Nguyen Anh Quynh | c68876f | 2006-12-29 16:49:54 -0800 | [diff] [blame] | 1002 | rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high); |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1003 | |
| 1004 | /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */ |
| 1005 | if ((vmx_msr_high & 0x1fff) > PAGE_SIZE) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1006 | return -EIO; |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1007 | |
| 1008 | #ifdef CONFIG_X86_64 |
| 1009 | /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */ |
| 1010 | if (vmx_msr_high & (1u<<16)) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1011 | return -EIO; |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1012 | #endif |
| 1013 | |
| 1014 | /* Require Write-Back (WB) memory type for VMCS accesses. */ |
| 1015 | if (((vmx_msr_high >> 18) & 15) != 6) |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1016 | return -EIO; |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1017 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1018 | vmcs_conf->size = vmx_msr_high & 0x1fff; |
| 1019 | vmcs_conf->order = get_order(vmcs_config.size); |
| 1020 | vmcs_conf->revision_id = vmx_msr_low; |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1021 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1022 | vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control; |
| 1023 | vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control; |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1024 | vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control; |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1025 | vmcs_conf->vmexit_ctrl = _vmexit_control; |
| 1026 | vmcs_conf->vmentry_ctrl = _vmentry_control; |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1027 | |
| 1028 | return 0; |
Nguyen Anh Quynh | c68876f | 2006-12-29 16:49:54 -0800 | [diff] [blame] | 1029 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1030 | |
| 1031 | static struct vmcs *alloc_vmcs_cpu(int cpu) |
| 1032 | { |
| 1033 | int node = cpu_to_node(cpu); |
| 1034 | struct page *pages; |
| 1035 | struct vmcs *vmcs; |
| 1036 | |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1037 | pages = alloc_pages_node(node, GFP_KERNEL, vmcs_config.order); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1038 | if (!pages) |
| 1039 | return NULL; |
| 1040 | vmcs = page_address(pages); |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1041 | memset(vmcs, 0, vmcs_config.size); |
| 1042 | vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1043 | return vmcs; |
| 1044 | } |
| 1045 | |
| 1046 | static struct vmcs *alloc_vmcs(void) |
| 1047 | { |
Ingo Molnar | d3b2c33 | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 1048 | return alloc_vmcs_cpu(raw_smp_processor_id()); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1049 | } |
| 1050 | |
| 1051 | static void free_vmcs(struct vmcs *vmcs) |
| 1052 | { |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1053 | free_pages((unsigned long)vmcs, vmcs_config.order); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1054 | } |
| 1055 | |
Sam Ravnborg | 3995958 | 2007-06-01 00:47:13 -0700 | [diff] [blame] | 1056 | static void free_kvm_area(void) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1057 | { |
| 1058 | int cpu; |
| 1059 | |
| 1060 | for_each_online_cpu(cpu) |
| 1061 | free_vmcs(per_cpu(vmxarea, cpu)); |
| 1062 | } |
| 1063 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1064 | static __init int alloc_kvm_area(void) |
| 1065 | { |
| 1066 | int cpu; |
| 1067 | |
| 1068 | for_each_online_cpu(cpu) { |
| 1069 | struct vmcs *vmcs; |
| 1070 | |
| 1071 | vmcs = alloc_vmcs_cpu(cpu); |
| 1072 | if (!vmcs) { |
| 1073 | free_kvm_area(); |
| 1074 | return -ENOMEM; |
| 1075 | } |
| 1076 | |
| 1077 | per_cpu(vmxarea, cpu) = vmcs; |
| 1078 | } |
| 1079 | return 0; |
| 1080 | } |
| 1081 | |
| 1082 | static __init int hardware_setup(void) |
| 1083 | { |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 1084 | if (setup_vmcs_config(&vmcs_config) < 0) |
| 1085 | return -EIO; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1086 | return alloc_kvm_area(); |
| 1087 | } |
| 1088 | |
| 1089 | static __exit void hardware_unsetup(void) |
| 1090 | { |
| 1091 | free_kvm_area(); |
| 1092 | } |
| 1093 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1094 | static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save) |
| 1095 | { |
| 1096 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1097 | |
Avi Kivity | 6af11b9 | 2007-03-19 13:18:10 +0200 | [diff] [blame] | 1098 | if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1099 | vmcs_write16(sf->selector, save->selector); |
| 1100 | vmcs_writel(sf->base, save->base); |
| 1101 | vmcs_write32(sf->limit, save->limit); |
| 1102 | vmcs_write32(sf->ar_bytes, save->ar); |
| 1103 | } else { |
| 1104 | u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK) |
| 1105 | << AR_DPL_SHIFT; |
| 1106 | vmcs_write32(sf->ar_bytes, 0x93 | dpl); |
| 1107 | } |
| 1108 | } |
| 1109 | |
| 1110 | static void enter_pmode(struct kvm_vcpu *vcpu) |
| 1111 | { |
| 1112 | unsigned long flags; |
| 1113 | |
| 1114 | vcpu->rmode.active = 0; |
| 1115 | |
| 1116 | vmcs_writel(GUEST_TR_BASE, vcpu->rmode.tr.base); |
| 1117 | vmcs_write32(GUEST_TR_LIMIT, vcpu->rmode.tr.limit); |
| 1118 | vmcs_write32(GUEST_TR_AR_BYTES, vcpu->rmode.tr.ar); |
| 1119 | |
| 1120 | flags = vmcs_readl(GUEST_RFLAGS); |
Glauber de Oliveira Costa | 053de04 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 1121 | flags &= ~(X86_EFLAGS_IOPL | X86_EFLAGS_VM); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1122 | flags |= (vcpu->rmode.save_iopl << IOPL_SHIFT); |
| 1123 | vmcs_writel(GUEST_RFLAGS, flags); |
| 1124 | |
Rusty Russell | 66aee91 | 2007-07-17 23:34:16 +1000 | [diff] [blame] | 1125 | vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) | |
| 1126 | (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME)); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1127 | |
| 1128 | update_exception_bitmap(vcpu); |
| 1129 | |
| 1130 | fix_pmode_dataseg(VCPU_SREG_ES, &vcpu->rmode.es); |
| 1131 | fix_pmode_dataseg(VCPU_SREG_DS, &vcpu->rmode.ds); |
| 1132 | fix_pmode_dataseg(VCPU_SREG_GS, &vcpu->rmode.gs); |
| 1133 | fix_pmode_dataseg(VCPU_SREG_FS, &vcpu->rmode.fs); |
| 1134 | |
| 1135 | vmcs_write16(GUEST_SS_SELECTOR, 0); |
| 1136 | vmcs_write32(GUEST_SS_AR_BYTES, 0x93); |
| 1137 | |
| 1138 | vmcs_write16(GUEST_CS_SELECTOR, |
| 1139 | vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK); |
| 1140 | vmcs_write32(GUEST_CS_AR_BYTES, 0x9b); |
| 1141 | } |
| 1142 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 1143 | static gva_t rmode_tss_base(struct kvm *kvm) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1144 | { |
Izik Eidus | cbc9402 | 2007-10-25 00:29:55 +0200 | [diff] [blame] | 1145 | if (!kvm->tss_addr) { |
| 1146 | gfn_t base_gfn = kvm->memslots[0].base_gfn + |
| 1147 | kvm->memslots[0].npages - 3; |
| 1148 | return base_gfn << PAGE_SHIFT; |
| 1149 | } |
| 1150 | return kvm->tss_addr; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1151 | } |
| 1152 | |
| 1153 | static void fix_rmode_seg(int seg, struct kvm_save_segment *save) |
| 1154 | { |
| 1155 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1156 | |
| 1157 | save->selector = vmcs_read16(sf->selector); |
| 1158 | save->base = vmcs_readl(sf->base); |
| 1159 | save->limit = vmcs_read32(sf->limit); |
| 1160 | save->ar = vmcs_read32(sf->ar_bytes); |
| 1161 | vmcs_write16(sf->selector, vmcs_readl(sf->base) >> 4); |
| 1162 | vmcs_write32(sf->limit, 0xffff); |
| 1163 | vmcs_write32(sf->ar_bytes, 0xf3); |
| 1164 | } |
| 1165 | |
| 1166 | static void enter_rmode(struct kvm_vcpu *vcpu) |
| 1167 | { |
| 1168 | unsigned long flags; |
| 1169 | |
| 1170 | vcpu->rmode.active = 1; |
| 1171 | |
| 1172 | vcpu->rmode.tr.base = vmcs_readl(GUEST_TR_BASE); |
| 1173 | vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm)); |
| 1174 | |
| 1175 | vcpu->rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT); |
| 1176 | vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1); |
| 1177 | |
| 1178 | vcpu->rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES); |
| 1179 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); |
| 1180 | |
| 1181 | flags = vmcs_readl(GUEST_RFLAGS); |
Glauber de Oliveira Costa | 053de04 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 1182 | vcpu->rmode.save_iopl = (flags & X86_EFLAGS_IOPL) >> IOPL_SHIFT; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1183 | |
Glauber de Oliveira Costa | 053de04 | 2008-01-30 13:31:27 +0100 | [diff] [blame] | 1184 | flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1185 | |
| 1186 | vmcs_writel(GUEST_RFLAGS, flags); |
Rusty Russell | 66aee91 | 2007-07-17 23:34:16 +1000 | [diff] [blame] | 1187 | vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1188 | update_exception_bitmap(vcpu); |
| 1189 | |
| 1190 | vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4); |
| 1191 | vmcs_write32(GUEST_SS_LIMIT, 0xffff); |
| 1192 | vmcs_write32(GUEST_SS_AR_BYTES, 0xf3); |
| 1193 | |
| 1194 | vmcs_write32(GUEST_CS_AR_BYTES, 0xf3); |
Michael Riepe | abacf8d | 2006-12-22 01:05:45 -0800 | [diff] [blame] | 1195 | vmcs_write32(GUEST_CS_LIMIT, 0xffff); |
Avi Kivity | 8cb5b03 | 2007-03-20 18:40:40 +0200 | [diff] [blame] | 1196 | if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000) |
| 1197 | vmcs_writel(GUEST_CS_BASE, 0xf0000); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1198 | vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4); |
| 1199 | |
| 1200 | fix_rmode_seg(VCPU_SREG_ES, &vcpu->rmode.es); |
| 1201 | fix_rmode_seg(VCPU_SREG_DS, &vcpu->rmode.ds); |
| 1202 | fix_rmode_seg(VCPU_SREG_GS, &vcpu->rmode.gs); |
| 1203 | fix_rmode_seg(VCPU_SREG_FS, &vcpu->rmode.fs); |
Avi Kivity | 75880a0 | 2007-06-20 11:20:04 +0300 | [diff] [blame] | 1204 | |
Eddie Dong | 8668a3c | 2007-10-10 14:26:45 +0800 | [diff] [blame] | 1205 | kvm_mmu_reset_context(vcpu); |
Avi Kivity | 75880a0 | 2007-06-20 11:20:04 +0300 | [diff] [blame] | 1206 | init_rmode_tss(vcpu->kvm); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1207 | } |
| 1208 | |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1209 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1210 | |
| 1211 | static void enter_lmode(struct kvm_vcpu *vcpu) |
| 1212 | { |
| 1213 | u32 guest_tr_ar; |
| 1214 | |
| 1215 | guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES); |
| 1216 | if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) { |
| 1217 | printk(KERN_DEBUG "%s: tss fixup for long mode. \n", |
| 1218 | __FUNCTION__); |
| 1219 | vmcs_write32(GUEST_TR_AR_BYTES, |
| 1220 | (guest_tr_ar & ~AR_TYPE_MASK) |
| 1221 | | AR_TYPE_BUSY_64_TSS); |
| 1222 | } |
| 1223 | |
| 1224 | vcpu->shadow_efer |= EFER_LMA; |
| 1225 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1226 | 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] | 1227 | vmcs_write32(VM_ENTRY_CONTROLS, |
| 1228 | vmcs_read32(VM_ENTRY_CONTROLS) |
Li, Xin B | 1e4e6e0 | 2007-08-01 21:49:10 +0300 | [diff] [blame] | 1229 | | VM_ENTRY_IA32E_MODE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1230 | } |
| 1231 | |
| 1232 | static void exit_lmode(struct kvm_vcpu *vcpu) |
| 1233 | { |
| 1234 | vcpu->shadow_efer &= ~EFER_LMA; |
| 1235 | |
| 1236 | vmcs_write32(VM_ENTRY_CONTROLS, |
| 1237 | vmcs_read32(VM_ENTRY_CONTROLS) |
Li, Xin B | 1e4e6e0 | 2007-08-01 21:49:10 +0300 | [diff] [blame] | 1238 | & ~VM_ENTRY_IA32E_MODE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1239 | } |
| 1240 | |
| 1241 | #endif |
| 1242 | |
Anthony Liguori | 25c4c27 | 2007-04-27 09:29:21 +0300 | [diff] [blame] | 1243 | static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) |
Avi Kivity | 399badf | 2007-01-05 16:36:38 -0800 | [diff] [blame] | 1244 | { |
Avi Kivity | 399badf | 2007-01-05 16:36:38 -0800 | [diff] [blame] | 1245 | vcpu->cr4 &= KVM_GUEST_CR4_MASK; |
| 1246 | vcpu->cr4 |= vmcs_readl(GUEST_CR4) & ~KVM_GUEST_CR4_MASK; |
| 1247 | } |
| 1248 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1249 | static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
| 1250 | { |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1251 | vmx_fpu_deactivate(vcpu); |
| 1252 | |
Rusty Russell | 707d92f | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1253 | if (vcpu->rmode.active && (cr0 & X86_CR0_PE)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1254 | enter_pmode(vcpu); |
| 1255 | |
Rusty Russell | 707d92f | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1256 | if (!vcpu->rmode.active && !(cr0 & X86_CR0_PE)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1257 | enter_rmode(vcpu); |
| 1258 | |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1259 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1260 | if (vcpu->shadow_efer & EFER_LME) { |
Rusty Russell | 707d92f | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1261 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1262 | enter_lmode(vcpu); |
Rusty Russell | 707d92f | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1263 | if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1264 | exit_lmode(vcpu); |
| 1265 | } |
| 1266 | #endif |
| 1267 | |
| 1268 | vmcs_writel(CR0_READ_SHADOW, cr0); |
| 1269 | vmcs_writel(GUEST_CR0, |
| 1270 | (cr0 & ~KVM_GUEST_CR0_MASK) | KVM_VM_CR0_ALWAYS_ON); |
| 1271 | vcpu->cr0 = cr0; |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1272 | |
Rusty Russell | 707d92f | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1273 | if (!(cr0 & X86_CR0_TS) || !(cr0 & X86_CR0_PE)) |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1274 | vmx_fpu_activate(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1275 | } |
| 1276 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1277 | static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
| 1278 | { |
| 1279 | vmcs_writel(GUEST_CR3, cr3); |
Rusty Russell | 707d92f | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1280 | if (vcpu->cr0 & X86_CR0_PE) |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1281 | vmx_fpu_deactivate(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1282 | } |
| 1283 | |
| 1284 | static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
| 1285 | { |
| 1286 | vmcs_writel(CR4_READ_SHADOW, cr4); |
| 1287 | vmcs_writel(GUEST_CR4, cr4 | (vcpu->rmode.active ? |
| 1288 | KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON)); |
| 1289 | vcpu->cr4 = cr4; |
| 1290 | } |
| 1291 | |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1292 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1293 | |
| 1294 | static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer) |
| 1295 | { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1296 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 1297 | struct kvm_msr_entry *msr = find_msr_entry(vmx, MSR_EFER); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1298 | |
| 1299 | vcpu->shadow_efer = efer; |
| 1300 | if (efer & EFER_LMA) { |
| 1301 | vmcs_write32(VM_ENTRY_CONTROLS, |
| 1302 | vmcs_read32(VM_ENTRY_CONTROLS) | |
Li, Xin B | 1e4e6e0 | 2007-08-01 21:49:10 +0300 | [diff] [blame] | 1303 | VM_ENTRY_IA32E_MODE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1304 | msr->data = efer; |
| 1305 | |
| 1306 | } else { |
| 1307 | vmcs_write32(VM_ENTRY_CONTROLS, |
| 1308 | vmcs_read32(VM_ENTRY_CONTROLS) & |
Li, Xin B | 1e4e6e0 | 2007-08-01 21:49:10 +0300 | [diff] [blame] | 1309 | ~VM_ENTRY_IA32E_MODE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1310 | |
| 1311 | msr->data = efer & ~EFER_LME; |
| 1312 | } |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1313 | setup_msrs(vmx); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1314 | } |
| 1315 | |
| 1316 | #endif |
| 1317 | |
| 1318 | static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg) |
| 1319 | { |
| 1320 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1321 | |
| 1322 | return vmcs_readl(sf->base); |
| 1323 | } |
| 1324 | |
| 1325 | static void vmx_get_segment(struct kvm_vcpu *vcpu, |
| 1326 | struct kvm_segment *var, int seg) |
| 1327 | { |
| 1328 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1329 | u32 ar; |
| 1330 | |
| 1331 | var->base = vmcs_readl(sf->base); |
| 1332 | var->limit = vmcs_read32(sf->limit); |
| 1333 | var->selector = vmcs_read16(sf->selector); |
| 1334 | ar = vmcs_read32(sf->ar_bytes); |
| 1335 | if (ar & AR_UNUSABLE_MASK) |
| 1336 | ar = 0; |
| 1337 | var->type = ar & 15; |
| 1338 | var->s = (ar >> 4) & 1; |
| 1339 | var->dpl = (ar >> 5) & 3; |
| 1340 | var->present = (ar >> 7) & 1; |
| 1341 | var->avl = (ar >> 12) & 1; |
| 1342 | var->l = (ar >> 13) & 1; |
| 1343 | var->db = (ar >> 14) & 1; |
| 1344 | var->g = (ar >> 15) & 1; |
| 1345 | var->unusable = (ar >> 16) & 1; |
| 1346 | } |
| 1347 | |
Avi Kivity | 653e310 | 2007-05-07 10:55:37 +0300 | [diff] [blame] | 1348 | static u32 vmx_segment_access_rights(struct kvm_segment *var) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1349 | { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1350 | u32 ar; |
| 1351 | |
Avi Kivity | 653e310 | 2007-05-07 10:55:37 +0300 | [diff] [blame] | 1352 | if (var->unusable) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1353 | ar = 1 << 16; |
| 1354 | else { |
| 1355 | ar = var->type & 15; |
| 1356 | ar |= (var->s & 1) << 4; |
| 1357 | ar |= (var->dpl & 3) << 5; |
| 1358 | ar |= (var->present & 1) << 7; |
| 1359 | ar |= (var->avl & 1) << 12; |
| 1360 | ar |= (var->l & 1) << 13; |
| 1361 | ar |= (var->db & 1) << 14; |
| 1362 | ar |= (var->g & 1) << 15; |
| 1363 | } |
Uri Lublin | f7fbf1f | 2006-12-13 00:34:00 -0800 | [diff] [blame] | 1364 | if (ar == 0) /* a 0 value means unusable */ |
| 1365 | ar = AR_UNUSABLE_MASK; |
Avi Kivity | 653e310 | 2007-05-07 10:55:37 +0300 | [diff] [blame] | 1366 | |
| 1367 | return ar; |
| 1368 | } |
| 1369 | |
| 1370 | static void vmx_set_segment(struct kvm_vcpu *vcpu, |
| 1371 | struct kvm_segment *var, int seg) |
| 1372 | { |
| 1373 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1374 | u32 ar; |
| 1375 | |
| 1376 | if (vcpu->rmode.active && seg == VCPU_SREG_TR) { |
| 1377 | vcpu->rmode.tr.selector = var->selector; |
| 1378 | vcpu->rmode.tr.base = var->base; |
| 1379 | vcpu->rmode.tr.limit = var->limit; |
| 1380 | vcpu->rmode.tr.ar = vmx_segment_access_rights(var); |
| 1381 | return; |
| 1382 | } |
| 1383 | vmcs_writel(sf->base, var->base); |
| 1384 | vmcs_write32(sf->limit, var->limit); |
| 1385 | vmcs_write16(sf->selector, var->selector); |
| 1386 | if (vcpu->rmode.active && var->s) { |
| 1387 | /* |
| 1388 | * Hack real-mode segments into vm86 compatibility. |
| 1389 | */ |
| 1390 | if (var->base == 0xffff0000 && var->selector == 0xf000) |
| 1391 | vmcs_writel(sf->base, 0xf0000); |
| 1392 | ar = 0xf3; |
| 1393 | } else |
| 1394 | ar = vmx_segment_access_rights(var); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1395 | vmcs_write32(sf->ar_bytes, ar); |
| 1396 | } |
| 1397 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1398 | static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
| 1399 | { |
| 1400 | u32 ar = vmcs_read32(GUEST_CS_AR_BYTES); |
| 1401 | |
| 1402 | *db = (ar >> 14) & 1; |
| 1403 | *l = (ar >> 13) & 1; |
| 1404 | } |
| 1405 | |
| 1406 | static void vmx_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 1407 | { |
| 1408 | dt->limit = vmcs_read32(GUEST_IDTR_LIMIT); |
| 1409 | dt->base = vmcs_readl(GUEST_IDTR_BASE); |
| 1410 | } |
| 1411 | |
| 1412 | static void vmx_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 1413 | { |
| 1414 | vmcs_write32(GUEST_IDTR_LIMIT, dt->limit); |
| 1415 | vmcs_writel(GUEST_IDTR_BASE, dt->base); |
| 1416 | } |
| 1417 | |
| 1418 | static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 1419 | { |
| 1420 | dt->limit = vmcs_read32(GUEST_GDTR_LIMIT); |
| 1421 | dt->base = vmcs_readl(GUEST_GDTR_BASE); |
| 1422 | } |
| 1423 | |
| 1424 | static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 1425 | { |
| 1426 | vmcs_write32(GUEST_GDTR_LIMIT, dt->limit); |
| 1427 | vmcs_writel(GUEST_GDTR_BASE, dt->base); |
| 1428 | } |
| 1429 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 1430 | static int init_rmode_tss(struct kvm *kvm) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1431 | { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1432 | gfn_t fn = rmode_tss_base(kvm) >> PAGE_SHIFT; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1433 | u16 data = 0; |
| 1434 | int r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1435 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1436 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
| 1437 | if (r < 0) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1438 | return 0; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1439 | data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE; |
| 1440 | r = kvm_write_guest_page(kvm, fn++, &data, 0x66, sizeof(u16)); |
| 1441 | if (r < 0) |
| 1442 | return 0; |
| 1443 | r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE); |
| 1444 | if (r < 0) |
| 1445 | return 0; |
| 1446 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
| 1447 | if (r < 0) |
| 1448 | return 0; |
| 1449 | data = ~0; |
| 1450 | r = kvm_write_guest_page(kvm, fn, &data, RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1, |
| 1451 | sizeof(u8)); |
| 1452 | if (r < 0) |
| 1453 | return 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1454 | return 1; |
| 1455 | } |
| 1456 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1457 | static void seg_setup(int seg) |
| 1458 | { |
| 1459 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
| 1460 | |
| 1461 | vmcs_write16(sf->selector, 0); |
| 1462 | vmcs_writel(sf->base, 0); |
| 1463 | vmcs_write32(sf->limit, 0xffff); |
| 1464 | vmcs_write32(sf->ar_bytes, 0x93); |
| 1465 | } |
| 1466 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1467 | static int alloc_apic_access_page(struct kvm *kvm) |
| 1468 | { |
| 1469 | struct kvm_userspace_memory_region kvm_userspace_mem; |
| 1470 | int r = 0; |
| 1471 | |
| 1472 | mutex_lock(&kvm->lock); |
| 1473 | if (kvm->apic_access_page) |
| 1474 | goto out; |
| 1475 | kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT; |
| 1476 | kvm_userspace_mem.flags = 0; |
| 1477 | kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL; |
| 1478 | kvm_userspace_mem.memory_size = PAGE_SIZE; |
| 1479 | r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0); |
| 1480 | if (r) |
| 1481 | goto out; |
| 1482 | kvm->apic_access_page = gfn_to_page(kvm, 0xfee00); |
| 1483 | out: |
| 1484 | mutex_unlock(&kvm->lock); |
| 1485 | return r; |
| 1486 | } |
| 1487 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1488 | /* |
| 1489 | * Sets up the vmcs for emulated real mode. |
| 1490 | */ |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1491 | static int vmx_vcpu_setup(struct vcpu_vmx *vmx) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1492 | { |
| 1493 | u32 host_sysenter_cs; |
| 1494 | u32 junk; |
| 1495 | unsigned long a; |
| 1496 | struct descriptor_table dt; |
| 1497 | int i; |
Avi Kivity | cd2276a | 2007-05-14 20:41:13 +0300 | [diff] [blame] | 1498 | unsigned long kvm_vmx_return; |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 1499 | u32 exec_control; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1500 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1501 | /* I/O */ |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 1502 | vmcs_write64(IO_BITMAP_A, page_to_phys(vmx_io_bitmap_a)); |
| 1503 | vmcs_write64(IO_BITMAP_B, page_to_phys(vmx_io_bitmap_b)); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1504 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1505 | vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */ |
| 1506 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1507 | /* Control */ |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1508 | vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, |
| 1509 | vmcs_config.pin_based_exec_ctrl); |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 1510 | |
| 1511 | exec_control = vmcs_config.cpu_based_exec_ctrl; |
| 1512 | if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) { |
| 1513 | exec_control &= ~CPU_BASED_TPR_SHADOW; |
| 1514 | #ifdef CONFIG_X86_64 |
| 1515 | exec_control |= CPU_BASED_CR8_STORE_EXITING | |
| 1516 | CPU_BASED_CR8_LOAD_EXITING; |
| 1517 | #endif |
| 1518 | } |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1519 | if (!vm_need_secondary_exec_ctrls(vmx->vcpu.kvm)) |
| 1520 | exec_control &= ~CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 1521 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1522 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1523 | if (vm_need_secondary_exec_ctrls(vmx->vcpu.kvm)) |
| 1524 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, |
| 1525 | vmcs_config.cpu_based_2nd_exec_ctrl); |
| 1526 | |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame] | 1527 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf); |
| 1528 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1529 | vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */ |
| 1530 | |
| 1531 | vmcs_writel(HOST_CR0, read_cr0()); /* 22.2.3 */ |
| 1532 | vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */ |
| 1533 | vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */ |
| 1534 | |
| 1535 | vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */ |
| 1536 | vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
| 1537 | vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
| 1538 | vmcs_write16(HOST_FS_SELECTOR, read_fs()); /* 22.2.4 */ |
| 1539 | vmcs_write16(HOST_GS_SELECTOR, read_gs()); /* 22.2.4 */ |
| 1540 | vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1541 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1542 | rdmsrl(MSR_FS_BASE, a); |
| 1543 | vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */ |
| 1544 | rdmsrl(MSR_GS_BASE, a); |
| 1545 | vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */ |
| 1546 | #else |
| 1547 | vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */ |
| 1548 | vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */ |
| 1549 | #endif |
| 1550 | |
| 1551 | vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */ |
| 1552 | |
| 1553 | get_idt(&dt); |
| 1554 | vmcs_writel(HOST_IDTR_BASE, dt.base); /* 22.2.4 */ |
| 1555 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 1556 | asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return)); |
Avi Kivity | cd2276a | 2007-05-14 20:41:13 +0300 | [diff] [blame] | 1557 | vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */ |
Eddie Dong | 2cc5156 | 2007-05-21 07:28:09 +0300 | [diff] [blame] | 1558 | vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0); |
| 1559 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0); |
| 1560 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1561 | |
| 1562 | rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk); |
| 1563 | vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs); |
| 1564 | rdmsrl(MSR_IA32_SYSENTER_ESP, a); |
| 1565 | vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */ |
| 1566 | rdmsrl(MSR_IA32_SYSENTER_EIP, a); |
| 1567 | vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */ |
| 1568 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1569 | for (i = 0; i < NR_VMX_MSR; ++i) { |
| 1570 | u32 index = vmx_msr_index[i]; |
| 1571 | u32 data_low, data_high; |
| 1572 | u64 data; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 1573 | int j = vmx->nmsrs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1574 | |
| 1575 | if (rdmsr_safe(index, &data_low, &data_high) < 0) |
| 1576 | continue; |
Avi Kivity | 432bd6c | 2007-01-31 23:48:13 -0800 | [diff] [blame] | 1577 | if (wrmsr_safe(index, data_low, data_high) < 0) |
| 1578 | continue; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1579 | data = data_low | ((u64)data_high << 32); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 1580 | vmx->host_msrs[j].index = index; |
| 1581 | vmx->host_msrs[j].reserved = 0; |
| 1582 | vmx->host_msrs[j].data = data; |
| 1583 | vmx->guest_msrs[j] = vmx->host_msrs[j]; |
| 1584 | ++vmx->nmsrs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1585 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1586 | |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1587 | vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1588 | |
| 1589 | /* 22.2.1, 20.8.1 */ |
Yang, Sheng | 1c3d14f | 2007-07-29 11:07:42 +0300 | [diff] [blame] | 1590 | vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl); |
| 1591 | |
Avi Kivity | e00c8cf | 2007-10-21 11:00:39 +0200 | [diff] [blame] | 1592 | vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL); |
| 1593 | vmcs_writel(CR4_GUEST_HOST_MASK, KVM_GUEST_CR4_MASK); |
| 1594 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1595 | if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) |
| 1596 | if (alloc_apic_access_page(vmx->vcpu.kvm) != 0) |
| 1597 | return -ENOMEM; |
| 1598 | |
Avi Kivity | e00c8cf | 2007-10-21 11:00:39 +0200 | [diff] [blame] | 1599 | return 0; |
| 1600 | } |
| 1601 | |
| 1602 | static int vmx_vcpu_reset(struct kvm_vcpu *vcpu) |
| 1603 | { |
| 1604 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 1605 | u64 msr; |
| 1606 | int ret; |
| 1607 | |
| 1608 | if (!init_rmode_tss(vmx->vcpu.kvm)) { |
| 1609 | ret = -ENOMEM; |
| 1610 | goto out; |
| 1611 | } |
| 1612 | |
| 1613 | vmx->vcpu.rmode.active = 0; |
| 1614 | |
| 1615 | vmx->vcpu.regs[VCPU_REGS_RDX] = get_rdx_init_val(); |
| 1616 | set_cr8(&vmx->vcpu, 0); |
| 1617 | msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; |
| 1618 | if (vmx->vcpu.vcpu_id == 0) |
| 1619 | msr |= MSR_IA32_APICBASE_BSP; |
| 1620 | kvm_set_apic_base(&vmx->vcpu, msr); |
| 1621 | |
| 1622 | fx_init(&vmx->vcpu); |
| 1623 | |
| 1624 | /* |
| 1625 | * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode |
| 1626 | * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh. |
| 1627 | */ |
| 1628 | if (vmx->vcpu.vcpu_id == 0) { |
| 1629 | vmcs_write16(GUEST_CS_SELECTOR, 0xf000); |
| 1630 | vmcs_writel(GUEST_CS_BASE, 0x000f0000); |
| 1631 | } else { |
| 1632 | vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.sipi_vector << 8); |
| 1633 | vmcs_writel(GUEST_CS_BASE, vmx->vcpu.sipi_vector << 12); |
| 1634 | } |
| 1635 | vmcs_write32(GUEST_CS_LIMIT, 0xffff); |
| 1636 | vmcs_write32(GUEST_CS_AR_BYTES, 0x9b); |
| 1637 | |
| 1638 | seg_setup(VCPU_SREG_DS); |
| 1639 | seg_setup(VCPU_SREG_ES); |
| 1640 | seg_setup(VCPU_SREG_FS); |
| 1641 | seg_setup(VCPU_SREG_GS); |
| 1642 | seg_setup(VCPU_SREG_SS); |
| 1643 | |
| 1644 | vmcs_write16(GUEST_TR_SELECTOR, 0); |
| 1645 | vmcs_writel(GUEST_TR_BASE, 0); |
| 1646 | vmcs_write32(GUEST_TR_LIMIT, 0xffff); |
| 1647 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); |
| 1648 | |
| 1649 | vmcs_write16(GUEST_LDTR_SELECTOR, 0); |
| 1650 | vmcs_writel(GUEST_LDTR_BASE, 0); |
| 1651 | vmcs_write32(GUEST_LDTR_LIMIT, 0xffff); |
| 1652 | vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082); |
| 1653 | |
| 1654 | vmcs_write32(GUEST_SYSENTER_CS, 0); |
| 1655 | vmcs_writel(GUEST_SYSENTER_ESP, 0); |
| 1656 | vmcs_writel(GUEST_SYSENTER_EIP, 0); |
| 1657 | |
| 1658 | vmcs_writel(GUEST_RFLAGS, 0x02); |
| 1659 | if (vmx->vcpu.vcpu_id == 0) |
| 1660 | vmcs_writel(GUEST_RIP, 0xfff0); |
| 1661 | else |
| 1662 | vmcs_writel(GUEST_RIP, 0); |
| 1663 | vmcs_writel(GUEST_RSP, 0); |
| 1664 | |
| 1665 | /* todo: dr0 = dr1 = dr2 = dr3 = 0; dr6 = 0xffff0ff0 */ |
| 1666 | vmcs_writel(GUEST_DR7, 0x400); |
| 1667 | |
| 1668 | vmcs_writel(GUEST_GDTR_BASE, 0); |
| 1669 | vmcs_write32(GUEST_GDTR_LIMIT, 0xffff); |
| 1670 | |
| 1671 | vmcs_writel(GUEST_IDTR_BASE, 0); |
| 1672 | vmcs_write32(GUEST_IDTR_LIMIT, 0xffff); |
| 1673 | |
| 1674 | vmcs_write32(GUEST_ACTIVITY_STATE, 0); |
| 1675 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0); |
| 1676 | vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0); |
| 1677 | |
| 1678 | guest_write_tsc(0); |
| 1679 | |
| 1680 | /* Special registers */ |
| 1681 | vmcs_write64(GUEST_IA32_DEBUGCTL, 0); |
| 1682 | |
| 1683 | setup_msrs(vmx); |
| 1684 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1685 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */ |
| 1686 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 1687 | if (cpu_has_vmx_tpr_shadow()) { |
| 1688 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0); |
| 1689 | if (vm_need_tpr_shadow(vmx->vcpu.kvm)) |
| 1690 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, |
| 1691 | page_to_phys(vmx->vcpu.apic->regs_page)); |
| 1692 | vmcs_write32(TPR_THRESHOLD, 0); |
| 1693 | } |
| 1694 | |
| 1695 | if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) |
| 1696 | vmcs_write64(APIC_ACCESS_ADDR, |
| 1697 | page_to_phys(vmx->vcpu.kvm->apic_access_page)); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1698 | |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1699 | vmx->vcpu.cr0 = 0x60000010; |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 1700 | vmx_set_cr0(&vmx->vcpu, vmx->vcpu.cr0); /* enter rmode */ |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1701 | vmx_set_cr4(&vmx->vcpu, 0); |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1702 | #ifdef CONFIG_X86_64 |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1703 | vmx_set_efer(&vmx->vcpu, 0); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1704 | #endif |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 1705 | vmx_fpu_activate(&vmx->vcpu); |
| 1706 | update_exception_bitmap(&vmx->vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1707 | |
| 1708 | return 0; |
| 1709 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1710 | out: |
| 1711 | return ret; |
| 1712 | } |
| 1713 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 1714 | static void vmx_inject_irq(struct kvm_vcpu *vcpu, int irq) |
| 1715 | { |
| 1716 | if (vcpu->rmode.active) { |
Avi Kivity | 9c5623e | 2007-11-08 18:19:20 +0200 | [diff] [blame] | 1717 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
| 1718 | irq | INTR_TYPE_SOFT_INTR | INTR_INFO_VALID_MASK); |
| 1719 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1); |
| 1720 | vmcs_writel(GUEST_RIP, vmcs_readl(GUEST_RIP) - 1); |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 1721 | return; |
| 1722 | } |
| 1723 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
| 1724 | irq | INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); |
| 1725 | } |
| 1726 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1727 | static void kvm_do_inject_irq(struct kvm_vcpu *vcpu) |
| 1728 | { |
| 1729 | int word_index = __ffs(vcpu->irq_summary); |
| 1730 | int bit_index = __ffs(vcpu->irq_pending[word_index]); |
| 1731 | int irq = word_index * BITS_PER_LONG + bit_index; |
| 1732 | |
| 1733 | clear_bit(bit_index, &vcpu->irq_pending[word_index]); |
| 1734 | if (!vcpu->irq_pending[word_index]) |
| 1735 | clear_bit(word_index, &vcpu->irq_summary); |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 1736 | vmx_inject_irq(vcpu, irq); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1737 | } |
| 1738 | |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 1739 | |
| 1740 | static void do_interrupt_requests(struct kvm_vcpu *vcpu, |
| 1741 | struct kvm_run *kvm_run) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1742 | { |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 1743 | u32 cpu_based_vm_exec_control; |
| 1744 | |
| 1745 | vcpu->interrupt_window_open = |
| 1746 | ((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && |
| 1747 | (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0); |
| 1748 | |
| 1749 | if (vcpu->interrupt_window_open && |
| 1750 | vcpu->irq_summary && |
| 1751 | !(vmcs_read32(VM_ENTRY_INTR_INFO_FIELD) & INTR_INFO_VALID_MASK)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1752 | /* |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 1753 | * If interrupts enabled, and not blocked by sti or mov ss. Good. |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1754 | */ |
| 1755 | kvm_do_inject_irq(vcpu); |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 1756 | |
| 1757 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
| 1758 | if (!vcpu->interrupt_window_open && |
| 1759 | (vcpu->irq_summary || kvm_run->request_interrupt_window)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1760 | /* |
| 1761 | * Interrupts blocked. Wait for unblock. |
| 1762 | */ |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 1763 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING; |
| 1764 | else |
| 1765 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; |
| 1766 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1767 | } |
| 1768 | |
Izik Eidus | cbc9402 | 2007-10-25 00:29:55 +0200 | [diff] [blame] | 1769 | static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr) |
| 1770 | { |
| 1771 | int ret; |
| 1772 | struct kvm_userspace_memory_region tss_mem = { |
| 1773 | .slot = 8, |
| 1774 | .guest_phys_addr = addr, |
| 1775 | .memory_size = PAGE_SIZE * 3, |
| 1776 | .flags = 0, |
| 1777 | }; |
| 1778 | |
| 1779 | ret = kvm_set_memory_region(kvm, &tss_mem, 0); |
| 1780 | if (ret) |
| 1781 | return ret; |
| 1782 | kvm->tss_addr = addr; |
| 1783 | return 0; |
| 1784 | } |
| 1785 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1786 | static void kvm_guest_debug_pre(struct kvm_vcpu *vcpu) |
| 1787 | { |
| 1788 | struct kvm_guest_debug *dbg = &vcpu->guest_debug; |
| 1789 | |
| 1790 | set_debugreg(dbg->bp[0], 0); |
| 1791 | set_debugreg(dbg->bp[1], 1); |
| 1792 | set_debugreg(dbg->bp[2], 2); |
| 1793 | set_debugreg(dbg->bp[3], 3); |
| 1794 | |
| 1795 | if (dbg->singlestep) { |
| 1796 | unsigned long flags; |
| 1797 | |
| 1798 | flags = vmcs_readl(GUEST_RFLAGS); |
| 1799 | flags |= X86_EFLAGS_TF | X86_EFLAGS_RF; |
| 1800 | vmcs_writel(GUEST_RFLAGS, flags); |
| 1801 | } |
| 1802 | } |
| 1803 | |
| 1804 | static int handle_rmode_exception(struct kvm_vcpu *vcpu, |
| 1805 | int vec, u32 err_code) |
| 1806 | { |
| 1807 | if (!vcpu->rmode.active) |
| 1808 | return 0; |
| 1809 | |
Nitin A Kamble | b3f3770 | 2007-05-17 15:50:34 +0300 | [diff] [blame] | 1810 | /* |
| 1811 | * Instruction with address size override prefix opcode 0x67 |
| 1812 | * Cause the #SS fault with 0 error code in VM86 mode. |
| 1813 | */ |
| 1814 | if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0) |
Laurent Vivier | 3427318 | 2007-09-18 11:27:37 +0200 | [diff] [blame] | 1815 | if (emulate_instruction(vcpu, NULL, 0, 0, 0) == EMULATE_DONE) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1816 | return 1; |
| 1817 | return 0; |
| 1818 | } |
| 1819 | |
| 1820 | static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1821 | { |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame^] | 1822 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1823 | u32 intr_info, error_code; |
| 1824 | unsigned long cr2, rip; |
| 1825 | u32 vect_info; |
| 1826 | enum emulation_result er; |
| 1827 | |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame^] | 1828 | vect_info = vmx->idt_vectoring_info; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1829 | intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
| 1830 | |
| 1831 | if ((vect_info & VECTORING_INFO_VALID_MASK) && |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 1832 | !is_page_fault(intr_info)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1833 | printk(KERN_ERR "%s: unexpected, vectoring info 0x%x " |
| 1834 | "intr info 0x%x\n", __FUNCTION__, vect_info, intr_info); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1835 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 1836 | if (!irqchip_in_kernel(vcpu->kvm) && is_external_interrupt(vect_info)) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1837 | int irq = vect_info & VECTORING_INFO_VECTOR_MASK; |
| 1838 | set_bit(irq, vcpu->irq_pending); |
| 1839 | set_bit(irq / BITS_PER_LONG, &vcpu->irq_summary); |
| 1840 | } |
| 1841 | |
Avi Kivity | 1b6269d | 2007-10-09 12:12:19 +0200 | [diff] [blame] | 1842 | if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) /* nmi */ |
| 1843 | return 1; /* already handled by vmx_vcpu_run() */ |
Anthony Liguori | 2ab455c | 2007-04-27 09:29:49 +0300 | [diff] [blame] | 1844 | |
| 1845 | if (is_no_device(intr_info)) { |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1846 | vmx_fpu_activate(vcpu); |
Anthony Liguori | 2ab455c | 2007-04-27 09:29:49 +0300 | [diff] [blame] | 1847 | return 1; |
| 1848 | } |
| 1849 | |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 1850 | if (is_invalid_opcode(intr_info)) { |
Laurent Vivier | 3427318 | 2007-09-18 11:27:37 +0200 | [diff] [blame] | 1851 | er = emulate_instruction(vcpu, kvm_run, 0, 0, 0); |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 1852 | if (er != EMULATE_DONE) |
| 1853 | vmx_inject_ud(vcpu); |
| 1854 | |
| 1855 | return 1; |
| 1856 | } |
| 1857 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1858 | error_code = 0; |
| 1859 | rip = vmcs_readl(GUEST_RIP); |
| 1860 | if (intr_info & INTR_INFO_DELIEVER_CODE_MASK) |
| 1861 | error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE); |
| 1862 | if (is_page_fault(intr_info)) { |
| 1863 | cr2 = vmcs_readl(EXIT_QUALIFICATION); |
Avi Kivity | 3067714 | 2007-10-28 18:48:59 +0200 | [diff] [blame] | 1864 | return kvm_mmu_page_fault(vcpu, cr2, error_code); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1865 | } |
| 1866 | |
| 1867 | if (vcpu->rmode.active && |
| 1868 | handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK, |
Avi Kivity | 72d6e5a | 2007-06-05 16:15:51 +0300 | [diff] [blame] | 1869 | error_code)) { |
| 1870 | if (vcpu->halt_request) { |
| 1871 | vcpu->halt_request = 0; |
| 1872 | return kvm_emulate_halt(vcpu); |
| 1873 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1874 | return 1; |
Avi Kivity | 72d6e5a | 2007-06-05 16:15:51 +0300 | [diff] [blame] | 1875 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1876 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 1877 | if ((intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK)) == |
| 1878 | (INTR_TYPE_EXCEPTION | 1)) { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1879 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
| 1880 | return 0; |
| 1881 | } |
| 1882 | kvm_run->exit_reason = KVM_EXIT_EXCEPTION; |
| 1883 | kvm_run->ex.exception = intr_info & INTR_INFO_VECTOR_MASK; |
| 1884 | kvm_run->ex.error_code = error_code; |
| 1885 | return 0; |
| 1886 | } |
| 1887 | |
| 1888 | static int handle_external_interrupt(struct kvm_vcpu *vcpu, |
| 1889 | struct kvm_run *kvm_run) |
| 1890 | { |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 1891 | ++vcpu->stat.irq_exits; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1892 | return 1; |
| 1893 | } |
| 1894 | |
Avi Kivity | 988ad74 | 2007-02-12 00:54:36 -0800 | [diff] [blame] | 1895 | static int handle_triple_fault(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1896 | { |
| 1897 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; |
| 1898 | return 0; |
| 1899 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1900 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1901 | static int handle_io(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1902 | { |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 1903 | unsigned long exit_qualification; |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1904 | int size, down, in, string, rep; |
| 1905 | unsigned port; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1906 | |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 1907 | ++vcpu->stat.io_exits; |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 1908 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1909 | string = (exit_qualification & 16) != 0; |
Laurent Vivier | e70669a | 2007-08-05 10:36:40 +0300 | [diff] [blame] | 1910 | |
| 1911 | if (string) { |
Laurent Vivier | 3427318 | 2007-09-18 11:27:37 +0200 | [diff] [blame] | 1912 | if (emulate_instruction(vcpu, |
| 1913 | kvm_run, 0, 0, 0) == EMULATE_DO_MMIO) |
Laurent Vivier | e70669a | 2007-08-05 10:36:40 +0300 | [diff] [blame] | 1914 | return 0; |
| 1915 | return 1; |
| 1916 | } |
| 1917 | |
| 1918 | size = (exit_qualification & 7) + 1; |
| 1919 | in = (exit_qualification & 8) != 0; |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1920 | down = (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_DF) != 0; |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1921 | rep = (exit_qualification & 32) != 0; |
| 1922 | port = exit_qualification >> 16; |
Laurent Vivier | e70669a | 2007-08-05 10:36:40 +0300 | [diff] [blame] | 1923 | |
Laurent Vivier | 3090dd7 | 2007-08-05 10:43:32 +0300 | [diff] [blame] | 1924 | return kvm_emulate_pio(vcpu, kvm_run, in, size, port); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1925 | } |
| 1926 | |
Ingo Molnar | 102d832 | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 1927 | static void |
| 1928 | vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) |
| 1929 | { |
| 1930 | /* |
| 1931 | * Patch in the VMCALL instruction: |
| 1932 | */ |
| 1933 | hypercall[0] = 0x0f; |
| 1934 | hypercall[1] = 0x01; |
| 1935 | hypercall[2] = 0xc1; |
Ingo Molnar | 102d832 | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 1936 | } |
| 1937 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1938 | static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1939 | { |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 1940 | unsigned long exit_qualification; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1941 | int cr; |
| 1942 | int reg; |
| 1943 | |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 1944 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1945 | cr = exit_qualification & 15; |
| 1946 | reg = (exit_qualification >> 8) & 15; |
| 1947 | switch ((exit_qualification >> 4) & 3) { |
| 1948 | case 0: /* mov to cr */ |
| 1949 | switch (cr) { |
| 1950 | case 0: |
| 1951 | vcpu_load_rsp_rip(vcpu); |
| 1952 | set_cr0(vcpu, vcpu->regs[reg]); |
| 1953 | skip_emulated_instruction(vcpu); |
| 1954 | return 1; |
| 1955 | case 3: |
| 1956 | vcpu_load_rsp_rip(vcpu); |
| 1957 | set_cr3(vcpu, vcpu->regs[reg]); |
| 1958 | skip_emulated_instruction(vcpu); |
| 1959 | return 1; |
| 1960 | case 4: |
| 1961 | vcpu_load_rsp_rip(vcpu); |
| 1962 | set_cr4(vcpu, vcpu->regs[reg]); |
| 1963 | skip_emulated_instruction(vcpu); |
| 1964 | return 1; |
| 1965 | case 8: |
| 1966 | vcpu_load_rsp_rip(vcpu); |
| 1967 | set_cr8(vcpu, vcpu->regs[reg]); |
| 1968 | skip_emulated_instruction(vcpu); |
Yang, Sheng | 253abde | 2007-08-16 13:01:00 +0300 | [diff] [blame] | 1969 | kvm_run->exit_reason = KVM_EXIT_SET_TPR; |
| 1970 | return 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1971 | }; |
| 1972 | break; |
Anthony Liguori | 25c4c27 | 2007-04-27 09:29:21 +0300 | [diff] [blame] | 1973 | case 2: /* clts */ |
| 1974 | vcpu_load_rsp_rip(vcpu); |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1975 | vmx_fpu_deactivate(vcpu); |
Rusty Russell | 707d92f | 2007-07-17 23:19:08 +1000 | [diff] [blame] | 1976 | vcpu->cr0 &= ~X86_CR0_TS; |
Anthony Liguori | 2ab455c | 2007-04-27 09:29:49 +0300 | [diff] [blame] | 1977 | vmcs_writel(CR0_READ_SHADOW, vcpu->cr0); |
Avi Kivity | 5fd86fc | 2007-05-02 20:40:00 +0300 | [diff] [blame] | 1978 | vmx_fpu_activate(vcpu); |
Anthony Liguori | 25c4c27 | 2007-04-27 09:29:21 +0300 | [diff] [blame] | 1979 | skip_emulated_instruction(vcpu); |
| 1980 | return 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1981 | case 1: /*mov from cr*/ |
| 1982 | switch (cr) { |
| 1983 | case 3: |
| 1984 | vcpu_load_rsp_rip(vcpu); |
| 1985 | vcpu->regs[reg] = vcpu->cr3; |
| 1986 | vcpu_put_rsp_rip(vcpu); |
| 1987 | skip_emulated_instruction(vcpu); |
| 1988 | return 1; |
| 1989 | case 8: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1990 | vcpu_load_rsp_rip(vcpu); |
Eddie Dong | 7017fc3 | 2007-07-18 11:34:57 +0300 | [diff] [blame] | 1991 | vcpu->regs[reg] = get_cr8(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1992 | vcpu_put_rsp_rip(vcpu); |
| 1993 | skip_emulated_instruction(vcpu); |
| 1994 | return 1; |
| 1995 | } |
| 1996 | break; |
| 1997 | case 3: /* lmsw */ |
| 1998 | lmsw(vcpu, (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f); |
| 1999 | |
| 2000 | skip_emulated_instruction(vcpu); |
| 2001 | return 1; |
| 2002 | default: |
| 2003 | break; |
| 2004 | } |
| 2005 | kvm_run->exit_reason = 0; |
Rusty Russell | f024247 | 2007-08-01 10:48:02 +1000 | [diff] [blame] | 2006 | pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n", |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2007 | (int)(exit_qualification >> 4) & 3, cr); |
| 2008 | return 0; |
| 2009 | } |
| 2010 | |
| 2011 | static int handle_dr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2012 | { |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 2013 | unsigned long exit_qualification; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2014 | unsigned long val; |
| 2015 | int dr, reg; |
| 2016 | |
| 2017 | /* |
| 2018 | * FIXME: this code assumes the host is debugging the guest. |
| 2019 | * need to deal with guest debugging itself too. |
| 2020 | */ |
He, Qing | bfdaab0 | 2007-09-12 14:18:28 +0800 | [diff] [blame] | 2021 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2022 | dr = exit_qualification & 7; |
| 2023 | reg = (exit_qualification >> 8) & 15; |
| 2024 | vcpu_load_rsp_rip(vcpu); |
| 2025 | if (exit_qualification & 16) { |
| 2026 | /* mov from dr */ |
| 2027 | switch (dr) { |
| 2028 | case 6: |
| 2029 | val = 0xffff0ff0; |
| 2030 | break; |
| 2031 | case 7: |
| 2032 | val = 0x400; |
| 2033 | break; |
| 2034 | default: |
| 2035 | val = 0; |
| 2036 | } |
| 2037 | vcpu->regs[reg] = val; |
| 2038 | } else { |
| 2039 | /* mov to dr */ |
| 2040 | } |
| 2041 | vcpu_put_rsp_rip(vcpu); |
| 2042 | skip_emulated_instruction(vcpu); |
| 2043 | return 1; |
| 2044 | } |
| 2045 | |
| 2046 | static int handle_cpuid(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2047 | { |
Avi Kivity | 06465c5 | 2007-02-28 20:46:53 +0200 | [diff] [blame] | 2048 | kvm_emulate_cpuid(vcpu); |
| 2049 | return 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2050 | } |
| 2051 | |
| 2052 | static int handle_rdmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2053 | { |
| 2054 | u32 ecx = vcpu->regs[VCPU_REGS_RCX]; |
| 2055 | u64 data; |
| 2056 | |
| 2057 | if (vmx_get_msr(vcpu, ecx, &data)) { |
| 2058 | vmx_inject_gp(vcpu, 0); |
| 2059 | return 1; |
| 2060 | } |
| 2061 | |
| 2062 | /* FIXME: handling of bits 32:63 of rax, rdx */ |
| 2063 | vcpu->regs[VCPU_REGS_RAX] = data & -1u; |
| 2064 | vcpu->regs[VCPU_REGS_RDX] = (data >> 32) & -1u; |
| 2065 | skip_emulated_instruction(vcpu); |
| 2066 | return 1; |
| 2067 | } |
| 2068 | |
| 2069 | static int handle_wrmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2070 | { |
| 2071 | u32 ecx = vcpu->regs[VCPU_REGS_RCX]; |
| 2072 | u64 data = (vcpu->regs[VCPU_REGS_RAX] & -1u) |
| 2073 | | ((u64)(vcpu->regs[VCPU_REGS_RDX] & -1u) << 32); |
| 2074 | |
| 2075 | if (vmx_set_msr(vcpu, ecx, data) != 0) { |
| 2076 | vmx_inject_gp(vcpu, 0); |
| 2077 | return 1; |
| 2078 | } |
| 2079 | |
| 2080 | skip_emulated_instruction(vcpu); |
| 2081 | return 1; |
| 2082 | } |
| 2083 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 2084 | static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu, |
| 2085 | struct kvm_run *kvm_run) |
| 2086 | { |
| 2087 | return 1; |
| 2088 | } |
| 2089 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2090 | static int handle_interrupt_window(struct kvm_vcpu *vcpu, |
| 2091 | struct kvm_run *kvm_run) |
| 2092 | { |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2093 | u32 cpu_based_vm_exec_control; |
| 2094 | |
| 2095 | /* clear pending irq */ |
| 2096 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
| 2097 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; |
| 2098 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2099 | /* |
| 2100 | * If the user space waits to inject interrupts, exit as soon as |
| 2101 | * possible |
| 2102 | */ |
| 2103 | if (kvm_run->request_interrupt_window && |
Dor Laor | 022a930 | 2007-01-05 16:37:00 -0800 | [diff] [blame] | 2104 | !vcpu->irq_summary) { |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2105 | kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2106 | ++vcpu->stat.irq_window_exits; |
Dor Laor | c1150d8 | 2007-01-05 16:36:24 -0800 | [diff] [blame] | 2107 | return 0; |
| 2108 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2109 | return 1; |
| 2110 | } |
| 2111 | |
| 2112 | static int handle_halt(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2113 | { |
| 2114 | skip_emulated_instruction(vcpu); |
Avi Kivity | d3bef15 | 2007-06-05 15:53:05 +0300 | [diff] [blame] | 2115 | return kvm_emulate_halt(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2116 | } |
| 2117 | |
Ingo Molnar | c21415e | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 2118 | static int handle_vmcall(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2119 | { |
Dor Laor | 510043d | 2007-02-19 18:25:43 +0200 | [diff] [blame] | 2120 | skip_emulated_instruction(vcpu); |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 2121 | kvm_emulate_hypercall(vcpu); |
| 2122 | return 1; |
Ingo Molnar | c21415e | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 2123 | } |
| 2124 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 2125 | static int handle_apic_access(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 2126 | { |
| 2127 | u64 exit_qualification; |
| 2128 | enum emulation_result er; |
| 2129 | unsigned long offset; |
| 2130 | |
| 2131 | exit_qualification = vmcs_read64(EXIT_QUALIFICATION); |
| 2132 | offset = exit_qualification & 0xffful; |
| 2133 | |
| 2134 | er = emulate_instruction(vcpu, kvm_run, 0, 0, 0); |
| 2135 | |
| 2136 | if (er != EMULATE_DONE) { |
| 2137 | printk(KERN_ERR |
| 2138 | "Fail to handle apic access vmexit! Offset is 0x%lx\n", |
| 2139 | offset); |
| 2140 | return -ENOTSUPP; |
| 2141 | } |
| 2142 | return 1; |
| 2143 | } |
| 2144 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2145 | /* |
| 2146 | * The exit handlers return 1 if the exit was handled fully and guest execution |
| 2147 | * may resume. Otherwise they set the kvm_run parameter to indicate what needs |
| 2148 | * to be done to userspace and return 0. |
| 2149 | */ |
| 2150 | static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu, |
| 2151 | struct kvm_run *kvm_run) = { |
| 2152 | [EXIT_REASON_EXCEPTION_NMI] = handle_exception, |
| 2153 | [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt, |
Avi Kivity | 988ad74 | 2007-02-12 00:54:36 -0800 | [diff] [blame] | 2154 | [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2155 | [EXIT_REASON_IO_INSTRUCTION] = handle_io, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2156 | [EXIT_REASON_CR_ACCESS] = handle_cr, |
| 2157 | [EXIT_REASON_DR_ACCESS] = handle_dr, |
| 2158 | [EXIT_REASON_CPUID] = handle_cpuid, |
| 2159 | [EXIT_REASON_MSR_READ] = handle_rdmsr, |
| 2160 | [EXIT_REASON_MSR_WRITE] = handle_wrmsr, |
| 2161 | [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window, |
| 2162 | [EXIT_REASON_HLT] = handle_halt, |
Ingo Molnar | c21415e | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 2163 | [EXIT_REASON_VMCALL] = handle_vmcall, |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 2164 | [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold, |
| 2165 | [EXIT_REASON_APIC_ACCESS] = handle_apic_access, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2166 | }; |
| 2167 | |
| 2168 | static const int kvm_vmx_max_exit_handlers = |
Robert P. J. Day | 50a3485 | 2007-06-03 13:35:29 -0400 | [diff] [blame] | 2169 | ARRAY_SIZE(kvm_vmx_exit_handlers); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2170 | |
| 2171 | /* |
| 2172 | * The guest has exited. See if we can fix it or if we need userspace |
| 2173 | * assistance. |
| 2174 | */ |
| 2175 | static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) |
| 2176 | { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2177 | u32 exit_reason = vmcs_read32(VM_EXIT_REASON); |
Avi Kivity | 29bd8a7 | 2007-09-10 17:27:03 +0300 | [diff] [blame] | 2178 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame^] | 2179 | u32 vectoring_info = vmx->idt_vectoring_info; |
Avi Kivity | 29bd8a7 | 2007-09-10 17:27:03 +0300 | [diff] [blame] | 2180 | |
| 2181 | if (unlikely(vmx->fail)) { |
| 2182 | kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY; |
| 2183 | kvm_run->fail_entry.hardware_entry_failure_reason |
| 2184 | = vmcs_read32(VM_INSTRUCTION_ERROR); |
| 2185 | return 0; |
| 2186 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2187 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2188 | if ((vectoring_info & VECTORING_INFO_VALID_MASK) && |
| 2189 | exit_reason != EXIT_REASON_EXCEPTION_NMI) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2190 | printk(KERN_WARNING "%s: unexpected, valid vectoring info and " |
| 2191 | "exit reason is 0x%x\n", __FUNCTION__, exit_reason); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2192 | if (exit_reason < kvm_vmx_max_exit_handlers |
| 2193 | && kvm_vmx_exit_handlers[exit_reason]) |
| 2194 | return kvm_vmx_exit_handlers[exit_reason](vcpu, kvm_run); |
| 2195 | else { |
| 2196 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; |
| 2197 | kvm_run->hw.hardware_exit_reason = exit_reason; |
| 2198 | } |
| 2199 | return 0; |
| 2200 | } |
| 2201 | |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 2202 | static void vmx_flush_tlb(struct kvm_vcpu *vcpu) |
| 2203 | { |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 2204 | } |
| 2205 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 2206 | static void update_tpr_threshold(struct kvm_vcpu *vcpu) |
| 2207 | { |
| 2208 | int max_irr, tpr; |
| 2209 | |
| 2210 | if (!vm_need_tpr_shadow(vcpu->kvm)) |
| 2211 | return; |
| 2212 | |
| 2213 | if (!kvm_lapic_enabled(vcpu) || |
| 2214 | ((max_irr = kvm_lapic_find_highest_irr(vcpu)) == -1)) { |
| 2215 | vmcs_write32(TPR_THRESHOLD, 0); |
| 2216 | return; |
| 2217 | } |
| 2218 | |
| 2219 | tpr = (kvm_lapic_get_cr8(vcpu) & 0x0f) << 4; |
| 2220 | vmcs_write32(TPR_THRESHOLD, (max_irr > tpr) ? tpr >> 4 : max_irr >> 4); |
| 2221 | } |
| 2222 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2223 | static void enable_irq_window(struct kvm_vcpu *vcpu) |
| 2224 | { |
| 2225 | u32 cpu_based_vm_exec_control; |
| 2226 | |
| 2227 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
| 2228 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING; |
| 2229 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); |
| 2230 | } |
| 2231 | |
| 2232 | static void vmx_intr_assist(struct kvm_vcpu *vcpu) |
| 2233 | { |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame^] | 2234 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2235 | u32 idtv_info_field, intr_info_field; |
| 2236 | int has_ext_irq, interrupt_window_open; |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 2237 | int vector; |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2238 | |
Yang, Sheng | 6e5d865 | 2007-09-12 18:03:11 +0800 | [diff] [blame] | 2239 | update_tpr_threshold(vcpu); |
| 2240 | |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2241 | has_ext_irq = kvm_cpu_has_interrupt(vcpu); |
| 2242 | intr_info_field = vmcs_read32(VM_ENTRY_INTR_INFO_FIELD); |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame^] | 2243 | idtv_info_field = vmx->idt_vectoring_info; |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2244 | if (intr_info_field & INTR_INFO_VALID_MASK) { |
| 2245 | if (idtv_info_field & INTR_INFO_VALID_MASK) { |
| 2246 | /* TODO: fault when IDT_Vectoring */ |
| 2247 | printk(KERN_ERR "Fault when IDT_Vectoring\n"); |
| 2248 | } |
| 2249 | if (has_ext_irq) |
| 2250 | enable_irq_window(vcpu); |
| 2251 | return; |
| 2252 | } |
| 2253 | if (unlikely(idtv_info_field & INTR_INFO_VALID_MASK)) { |
| 2254 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, idtv_info_field); |
| 2255 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, |
| 2256 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN)); |
| 2257 | |
| 2258 | if (unlikely(idtv_info_field & INTR_INFO_DELIEVER_CODE_MASK)) |
| 2259 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, |
| 2260 | vmcs_read32(IDT_VECTORING_ERROR_CODE)); |
| 2261 | if (unlikely(has_ext_irq)) |
| 2262 | enable_irq_window(vcpu); |
| 2263 | return; |
| 2264 | } |
| 2265 | if (!has_ext_irq) |
| 2266 | return; |
| 2267 | interrupt_window_open = |
| 2268 | ((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && |
| 2269 | (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0); |
Eddie Dong | 1b9778d | 2007-09-03 16:56:58 +0300 | [diff] [blame] | 2270 | if (interrupt_window_open) { |
| 2271 | vector = kvm_cpu_get_interrupt(vcpu); |
| 2272 | vmx_inject_irq(vcpu, vector); |
| 2273 | kvm_timer_intr_post(vcpu, vector); |
| 2274 | } else |
Eddie Dong | 85f455f | 2007-07-06 12:20:49 +0300 | [diff] [blame] | 2275 | enable_irq_window(vcpu); |
| 2276 | } |
| 2277 | |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2278 | 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] | 2279 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2280 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
Avi Kivity | 1b6269d | 2007-10-09 12:12:19 +0200 | [diff] [blame] | 2281 | u32 intr_info; |
Avi Kivity | e6adf28 | 2007-04-30 16:07:54 +0300 | [diff] [blame] | 2282 | |
| 2283 | /* |
| 2284 | * Loading guest fpu may have cleared host cr0.ts |
| 2285 | */ |
| 2286 | vmcs_writel(HOST_CR0, read_cr0()); |
| 2287 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2288 | asm( |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2289 | /* Store host registers */ |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 2290 | #ifdef CONFIG_X86_64 |
Laurent Vivier | c203630 | 2007-10-25 14:18:52 +0200 | [diff] [blame] | 2291 | "push %%rdx; push %%rbp;" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2292 | "push %%rcx \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2293 | #else |
Laurent Vivier | ff593e5 | 2007-10-25 14:18:55 +0200 | [diff] [blame] | 2294 | "push %%edx; push %%ebp;" |
| 2295 | "push %%ecx \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2296 | #endif |
Laurent Vivier | c203630 | 2007-10-25 14:18:52 +0200 | [diff] [blame] | 2297 | ASM_VMX_VMWRITE_RSP_RDX "\n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2298 | /* Check if vmlaunch of vmresume is needed */ |
| 2299 | "cmp $0, %1 \n\t" |
| 2300 | /* Load guest registers. Don't clobber flags. */ |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 2301 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2302 | "mov %c[cr2](%3), %%rax \n\t" |
| 2303 | "mov %%rax, %%cr2 \n\t" |
| 2304 | "mov %c[rax](%3), %%rax \n\t" |
| 2305 | "mov %c[rbx](%3), %%rbx \n\t" |
| 2306 | "mov %c[rdx](%3), %%rdx \n\t" |
| 2307 | "mov %c[rsi](%3), %%rsi \n\t" |
| 2308 | "mov %c[rdi](%3), %%rdi \n\t" |
| 2309 | "mov %c[rbp](%3), %%rbp \n\t" |
| 2310 | "mov %c[r8](%3), %%r8 \n\t" |
| 2311 | "mov %c[r9](%3), %%r9 \n\t" |
| 2312 | "mov %c[r10](%3), %%r10 \n\t" |
| 2313 | "mov %c[r11](%3), %%r11 \n\t" |
| 2314 | "mov %c[r12](%3), %%r12 \n\t" |
| 2315 | "mov %c[r13](%3), %%r13 \n\t" |
| 2316 | "mov %c[r14](%3), %%r14 \n\t" |
| 2317 | "mov %c[r15](%3), %%r15 \n\t" |
| 2318 | "mov %c[rcx](%3), %%rcx \n\t" /* kills %3 (rcx) */ |
| 2319 | #else |
| 2320 | "mov %c[cr2](%3), %%eax \n\t" |
| 2321 | "mov %%eax, %%cr2 \n\t" |
| 2322 | "mov %c[rax](%3), %%eax \n\t" |
| 2323 | "mov %c[rbx](%3), %%ebx \n\t" |
| 2324 | "mov %c[rdx](%3), %%edx \n\t" |
| 2325 | "mov %c[rsi](%3), %%esi \n\t" |
| 2326 | "mov %c[rdi](%3), %%edi \n\t" |
| 2327 | "mov %c[rbp](%3), %%ebp \n\t" |
| 2328 | "mov %c[rcx](%3), %%ecx \n\t" /* kills %3 (ecx) */ |
| 2329 | #endif |
| 2330 | /* Enter guest mode */ |
Avi Kivity | cd2276a | 2007-05-14 20:41:13 +0300 | [diff] [blame] | 2331 | "jne .Llaunched \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2332 | ASM_VMX_VMLAUNCH "\n\t" |
Avi Kivity | cd2276a | 2007-05-14 20:41:13 +0300 | [diff] [blame] | 2333 | "jmp .Lkvm_vmx_return \n\t" |
| 2334 | ".Llaunched: " ASM_VMX_VMRESUME "\n\t" |
| 2335 | ".Lkvm_vmx_return: " |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2336 | /* Save guest registers, load host registers, keep flags */ |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 2337 | #ifdef CONFIG_X86_64 |
Ingo Molnar | 9695823 | 2007-02-12 00:54:33 -0800 | [diff] [blame] | 2338 | "xchg %3, (%%rsp) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2339 | "mov %%rax, %c[rax](%3) \n\t" |
| 2340 | "mov %%rbx, %c[rbx](%3) \n\t" |
Ingo Molnar | 9695823 | 2007-02-12 00:54:33 -0800 | [diff] [blame] | 2341 | "pushq (%%rsp); popq %c[rcx](%3) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2342 | "mov %%rdx, %c[rdx](%3) \n\t" |
| 2343 | "mov %%rsi, %c[rsi](%3) \n\t" |
| 2344 | "mov %%rdi, %c[rdi](%3) \n\t" |
| 2345 | "mov %%rbp, %c[rbp](%3) \n\t" |
| 2346 | "mov %%r8, %c[r8](%3) \n\t" |
| 2347 | "mov %%r9, %c[r9](%3) \n\t" |
| 2348 | "mov %%r10, %c[r10](%3) \n\t" |
| 2349 | "mov %%r11, %c[r11](%3) \n\t" |
| 2350 | "mov %%r12, %c[r12](%3) \n\t" |
| 2351 | "mov %%r13, %c[r13](%3) \n\t" |
| 2352 | "mov %%r14, %c[r14](%3) \n\t" |
| 2353 | "mov %%r15, %c[r15](%3) \n\t" |
| 2354 | "mov %%cr2, %%rax \n\t" |
| 2355 | "mov %%rax, %c[cr2](%3) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2356 | |
Laurent Vivier | c203630 | 2007-10-25 14:18:52 +0200 | [diff] [blame] | 2357 | "pop %%rcx; pop %%rbp; pop %%rdx \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2358 | #else |
Ingo Molnar | 9695823 | 2007-02-12 00:54:33 -0800 | [diff] [blame] | 2359 | "xchg %3, (%%esp) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2360 | "mov %%eax, %c[rax](%3) \n\t" |
| 2361 | "mov %%ebx, %c[rbx](%3) \n\t" |
Ingo Molnar | 9695823 | 2007-02-12 00:54:33 -0800 | [diff] [blame] | 2362 | "pushl (%%esp); popl %c[rcx](%3) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2363 | "mov %%edx, %c[rdx](%3) \n\t" |
| 2364 | "mov %%esi, %c[rsi](%3) \n\t" |
| 2365 | "mov %%edi, %c[rdi](%3) \n\t" |
| 2366 | "mov %%ebp, %c[rbp](%3) \n\t" |
| 2367 | "mov %%cr2, %%eax \n\t" |
| 2368 | "mov %%eax, %c[cr2](%3) \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2369 | |
Laurent Vivier | ff593e5 | 2007-10-25 14:18:55 +0200 | [diff] [blame] | 2370 | "pop %%ecx; pop %%ebp; pop %%edx \n\t" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2371 | #endif |
| 2372 | "setbe %0 \n\t" |
Avi Kivity | 29bd8a7 | 2007-09-10 17:27:03 +0300 | [diff] [blame] | 2373 | : "=q" (vmx->fail) |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2374 | : "r"(vmx->launched), "d"((unsigned long)HOST_RSP), |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2375 | "c"(vcpu), |
| 2376 | [rax]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RAX])), |
| 2377 | [rbx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBX])), |
| 2378 | [rcx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RCX])), |
| 2379 | [rdx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RDX])), |
| 2380 | [rsi]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RSI])), |
| 2381 | [rdi]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RDI])), |
| 2382 | [rbp]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBP])), |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 2383 | #ifdef CONFIG_X86_64 |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2384 | [r8]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R8])), |
| 2385 | [r9]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R9])), |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2386 | [r10]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R10])), |
| 2387 | [r11]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R11])), |
| 2388 | [r12]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R12])), |
| 2389 | [r13]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R13])), |
| 2390 | [r14]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R14])), |
| 2391 | [r15]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R15])), |
| 2392 | #endif |
| 2393 | [cr2]"i"(offsetof(struct kvm_vcpu, cr2)) |
Laurent Vivier | c203630 | 2007-10-25 14:18:52 +0200 | [diff] [blame] | 2394 | : "cc", "memory" |
| 2395 | #ifdef CONFIG_X86_64 |
| 2396 | , "rbx", "rdi", "rsi" |
| 2397 | , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" |
Laurent Vivier | ff593e5 | 2007-10-25 14:18:55 +0200 | [diff] [blame] | 2398 | #else |
| 2399 | , "ebx", "edi", "rsi" |
Laurent Vivier | c203630 | 2007-10-25 14:18:52 +0200 | [diff] [blame] | 2400 | #endif |
| 2401 | ); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2402 | |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame^] | 2403 | vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); |
| 2404 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2405 | vcpu->interrupt_window_open = |
| 2406 | (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2407 | |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2408 | asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS)); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2409 | vmx->launched = 1; |
Avi Kivity | 1b6269d | 2007-10-09 12:12:19 +0200 | [diff] [blame] | 2410 | |
| 2411 | intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
| 2412 | |
| 2413 | /* We need to handle NMIs before interrupts are enabled */ |
| 2414 | if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) /* nmi */ |
| 2415 | asm("int $2"); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2416 | } |
| 2417 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2418 | static void vmx_inject_page_fault(struct kvm_vcpu *vcpu, |
| 2419 | unsigned long addr, |
| 2420 | u32 err_code) |
| 2421 | { |
Avi Kivity | 1155f76 | 2007-11-22 11:30:47 +0200 | [diff] [blame^] | 2422 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 2423 | u32 vect_info = vmx->idt_vectoring_info; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2424 | |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2425 | ++vcpu->stat.pf_guest; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2426 | |
| 2427 | if (is_page_fault(vect_info)) { |
| 2428 | printk(KERN_DEBUG "inject_page_fault: " |
| 2429 | "double fault 0x%lx @ 0x%lx\n", |
| 2430 | addr, vmcs_readl(GUEST_RIP)); |
| 2431 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, 0); |
| 2432 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
| 2433 | DF_VECTOR | |
| 2434 | INTR_TYPE_EXCEPTION | |
| 2435 | INTR_INFO_DELIEVER_CODE_MASK | |
| 2436 | INTR_INFO_VALID_MASK); |
| 2437 | return; |
| 2438 | } |
| 2439 | vcpu->cr2 = addr; |
| 2440 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, err_code); |
| 2441 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
| 2442 | PF_VECTOR | |
| 2443 | INTR_TYPE_EXCEPTION | |
| 2444 | INTR_INFO_DELIEVER_CODE_MASK | |
| 2445 | INTR_INFO_VALID_MASK); |
| 2446 | |
| 2447 | } |
| 2448 | |
| 2449 | static void vmx_free_vmcs(struct kvm_vcpu *vcpu) |
| 2450 | { |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2451 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 2452 | |
| 2453 | if (vmx->vmcs) { |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 2454 | on_each_cpu(__vcpu_clear, vmx, 0, 1); |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2455 | free_vmcs(vmx->vmcs); |
| 2456 | vmx->vmcs = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2457 | } |
| 2458 | } |
| 2459 | |
| 2460 | static void vmx_free_vcpu(struct kvm_vcpu *vcpu) |
| 2461 | { |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2462 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
| 2463 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2464 | vmx_free_vmcs(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2465 | kfree(vmx->host_msrs); |
| 2466 | kfree(vmx->guest_msrs); |
| 2467 | kvm_vcpu_uninit(vcpu); |
Rusty Russell | a477034 | 2007-08-01 14:46:11 +1000 | [diff] [blame] | 2468 | kmem_cache_free(kvm_vcpu_cache, vmx); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2469 | } |
| 2470 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2471 | 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] | 2472 | { |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2473 | int err; |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2474 | struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2475 | int cpu; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2476 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2477 | if (!vmx) |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2478 | return ERR_PTR(-ENOMEM); |
| 2479 | |
| 2480 | err = kvm_vcpu_init(&vmx->vcpu, kvm, id); |
| 2481 | if (err) |
| 2482 | goto free_vcpu; |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 2483 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2484 | vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2485 | if (!vmx->guest_msrs) { |
| 2486 | err = -ENOMEM; |
| 2487 | goto uninit_vcpu; |
| 2488 | } |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 2489 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2490 | vmx->host_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
| 2491 | if (!vmx->host_msrs) |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2492 | goto free_guest_msrs; |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 2493 | |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2494 | vmx->vmcs = alloc_vmcs(); |
| 2495 | if (!vmx->vmcs) |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2496 | goto free_msrs; |
Gregory Haskins | a2fa3e9 | 2007-07-27 08:13:10 -0400 | [diff] [blame] | 2497 | |
| 2498 | vmcs_clear(vmx->vmcs); |
| 2499 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2500 | cpu = get_cpu(); |
| 2501 | vmx_vcpu_load(&vmx->vcpu, cpu); |
Rusty Russell | 8b9cf98 | 2007-07-30 16:31:43 +1000 | [diff] [blame] | 2502 | err = vmx_vcpu_setup(vmx); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2503 | vmx_vcpu_put(&vmx->vcpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2504 | put_cpu(); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2505 | if (err) |
| 2506 | goto free_vmcs; |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 2507 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2508 | return &vmx->vcpu; |
Ingo Molnar | 965b58a | 2007-01-05 16:36:23 -0800 | [diff] [blame] | 2509 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2510 | free_vmcs: |
| 2511 | free_vmcs(vmx->vmcs); |
| 2512 | free_msrs: |
| 2513 | kfree(vmx->host_msrs); |
| 2514 | free_guest_msrs: |
| 2515 | kfree(vmx->guest_msrs); |
| 2516 | uninit_vcpu: |
| 2517 | kvm_vcpu_uninit(&vmx->vcpu); |
| 2518 | free_vcpu: |
Rusty Russell | a477034 | 2007-08-01 14:46:11 +1000 | [diff] [blame] | 2519 | kmem_cache_free(kvm_vcpu_cache, vmx); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2520 | return ERR_PTR(err); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2521 | } |
| 2522 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2523 | static void __init vmx_check_processor_compat(void *rtn) |
| 2524 | { |
| 2525 | struct vmcs_config vmcs_conf; |
| 2526 | |
| 2527 | *(int *)rtn = 0; |
| 2528 | if (setup_vmcs_config(&vmcs_conf) < 0) |
| 2529 | *(int *)rtn = -EIO; |
| 2530 | if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) { |
| 2531 | printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n", |
| 2532 | smp_processor_id()); |
| 2533 | *(int *)rtn = -EIO; |
| 2534 | } |
| 2535 | } |
| 2536 | |
Christian Ehrhardt | cbdd1be | 2007-09-09 15:41:59 +0300 | [diff] [blame] | 2537 | static struct kvm_x86_ops vmx_x86_ops = { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2538 | .cpu_has_kvm_support = cpu_has_kvm_support, |
| 2539 | .disabled_by_bios = vmx_disabled_by_bios, |
| 2540 | .hardware_setup = hardware_setup, |
| 2541 | .hardware_unsetup = hardware_unsetup, |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2542 | .check_processor_compatibility = vmx_check_processor_compat, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2543 | .hardware_enable = hardware_enable, |
| 2544 | .hardware_disable = hardware_disable, |
| 2545 | |
| 2546 | .vcpu_create = vmx_create_vcpu, |
| 2547 | .vcpu_free = vmx_free_vcpu, |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2548 | .vcpu_reset = vmx_vcpu_reset, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2549 | |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2550 | .prepare_guest_switch = vmx_save_host_state, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2551 | .vcpu_load = vmx_vcpu_load, |
| 2552 | .vcpu_put = vmx_vcpu_put, |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2553 | .vcpu_decache = vmx_vcpu_decache, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2554 | |
| 2555 | .set_guest_debug = set_guest_debug, |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2556 | .guest_debug_pre = kvm_guest_debug_pre, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2557 | .get_msr = vmx_get_msr, |
| 2558 | .set_msr = vmx_set_msr, |
| 2559 | .get_segment_base = vmx_get_segment_base, |
| 2560 | .get_segment = vmx_get_segment, |
| 2561 | .set_segment = vmx_set_segment, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2562 | .get_cs_db_l_bits = vmx_get_cs_db_l_bits, |
Anthony Liguori | 25c4c27 | 2007-04-27 09:29:21 +0300 | [diff] [blame] | 2563 | .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2564 | .set_cr0 = vmx_set_cr0, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2565 | .set_cr3 = vmx_set_cr3, |
| 2566 | .set_cr4 = vmx_set_cr4, |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 2567 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2568 | .set_efer = vmx_set_efer, |
| 2569 | #endif |
| 2570 | .get_idt = vmx_get_idt, |
| 2571 | .set_idt = vmx_set_idt, |
| 2572 | .get_gdt = vmx_get_gdt, |
| 2573 | .set_gdt = vmx_set_gdt, |
| 2574 | .cache_regs = vcpu_load_rsp_rip, |
| 2575 | .decache_regs = vcpu_put_rsp_rip, |
| 2576 | .get_rflags = vmx_get_rflags, |
| 2577 | .set_rflags = vmx_set_rflags, |
| 2578 | |
| 2579 | .tlb_flush = vmx_flush_tlb, |
| 2580 | .inject_page_fault = vmx_inject_page_fault, |
| 2581 | |
| 2582 | .inject_gp = vmx_inject_gp, |
| 2583 | |
| 2584 | .run = vmx_vcpu_run, |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2585 | .handle_exit = kvm_handle_exit, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2586 | .skip_emulated_instruction = skip_emulated_instruction, |
Ingo Molnar | 102d832 | 2007-02-19 14:37:47 +0200 | [diff] [blame] | 2587 | .patch_hypercall = vmx_patch_hypercall, |
Eddie Dong | 2a8067f | 2007-08-06 16:29:07 +0300 | [diff] [blame] | 2588 | .get_irq = vmx_get_irq, |
| 2589 | .set_irq = vmx_inject_irq, |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 2590 | .inject_pending_irq = vmx_intr_assist, |
| 2591 | .inject_pending_vectors = do_interrupt_requests, |
Izik Eidus | cbc9402 | 2007-10-25 00:29:55 +0200 | [diff] [blame] | 2592 | |
| 2593 | .set_tss_addr = vmx_set_tss_addr, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2594 | }; |
| 2595 | |
| 2596 | static int __init vmx_init(void) |
| 2597 | { |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 2598 | void *iova; |
| 2599 | int r; |
| 2600 | |
| 2601 | vmx_io_bitmap_a = alloc_page(GFP_KERNEL | __GFP_HIGHMEM); |
| 2602 | if (!vmx_io_bitmap_a) |
| 2603 | return -ENOMEM; |
| 2604 | |
| 2605 | vmx_io_bitmap_b = alloc_page(GFP_KERNEL | __GFP_HIGHMEM); |
| 2606 | if (!vmx_io_bitmap_b) { |
| 2607 | r = -ENOMEM; |
| 2608 | goto out; |
| 2609 | } |
| 2610 | |
| 2611 | /* |
| 2612 | * Allow direct access to the PC debug port (it is often used for I/O |
| 2613 | * delays, but the vmexits simply slow things down). |
| 2614 | */ |
| 2615 | iova = kmap(vmx_io_bitmap_a); |
| 2616 | memset(iova, 0xff, PAGE_SIZE); |
| 2617 | clear_bit(0x80, iova); |
Avi Kivity | cd0536d | 2007-05-08 11:34:07 +0300 | [diff] [blame] | 2618 | kunmap(vmx_io_bitmap_a); |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 2619 | |
| 2620 | iova = kmap(vmx_io_bitmap_b); |
| 2621 | memset(iova, 0xff, PAGE_SIZE); |
Avi Kivity | cd0536d | 2007-05-08 11:34:07 +0300 | [diff] [blame] | 2622 | kunmap(vmx_io_bitmap_b); |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 2623 | |
Christian Ehrhardt | cbdd1be | 2007-09-09 15:41:59 +0300 | [diff] [blame] | 2624 | r = kvm_init_x86(&vmx_x86_ops, sizeof(struct vcpu_vmx), THIS_MODULE); |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 2625 | if (r) |
| 2626 | goto out1; |
| 2627 | |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame] | 2628 | if (bypass_guest_pf) |
| 2629 | kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull); |
| 2630 | |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 2631 | return 0; |
| 2632 | |
| 2633 | out1: |
| 2634 | __free_page(vmx_io_bitmap_b); |
| 2635 | out: |
| 2636 | __free_page(vmx_io_bitmap_a); |
| 2637 | return r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2638 | } |
| 2639 | |
| 2640 | static void __exit vmx_exit(void) |
| 2641 | { |
He, Qing | fdef3ad | 2007-04-30 09:45:24 +0300 | [diff] [blame] | 2642 | __free_page(vmx_io_bitmap_b); |
| 2643 | __free_page(vmx_io_bitmap_a); |
| 2644 | |
Christian Ehrhardt | cbdd1be | 2007-09-09 15:41:59 +0300 | [diff] [blame] | 2645 | kvm_exit_x86(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2646 | } |
| 2647 | |
| 2648 | module_init(vmx_init) |
| 2649 | module_exit(vmx_exit) |