Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Kernel-based Virtual Machine driver for Linux |
| 3 | * |
| 4 | * AMD SVM support |
| 5 | * |
| 6 | * Copyright (C) 2006 Qumranet, Inc. |
| 7 | * |
| 8 | * Authors: |
| 9 | * Yaniv Kamay <yaniv@qumranet.com> |
| 10 | * Avi Kivity <avi@qumranet.com> |
| 11 | * |
| 12 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 13 | * the COPYING file in the top-level directory. |
| 14 | * |
| 15 | */ |
| 16 | |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/vmalloc.h> |
| 19 | #include <linux/highmem.h> |
| 20 | #include <asm/desc.h> |
| 21 | |
| 22 | #include "kvm_svm.h" |
| 23 | #include "x86_emulate.h" |
| 24 | |
| 25 | MODULE_AUTHOR("Qumranet"); |
| 26 | MODULE_LICENSE("GPL"); |
| 27 | |
| 28 | #define IOPM_ALLOC_ORDER 2 |
| 29 | #define MSRPM_ALLOC_ORDER 1 |
| 30 | |
| 31 | #define DB_VECTOR 1 |
| 32 | #define UD_VECTOR 6 |
| 33 | #define GP_VECTOR 13 |
| 34 | |
| 35 | #define DR7_GD_MASK (1 << 13) |
| 36 | #define DR6_BD_MASK (1 << 13) |
| 37 | #define CR4_DE_MASK (1UL << 3) |
| 38 | |
| 39 | #define SEG_TYPE_LDT 2 |
| 40 | #define SEG_TYPE_BUSY_TSS16 3 |
| 41 | |
| 42 | #define KVM_EFER_LMA (1 << 10) |
| 43 | #define KVM_EFER_LME (1 << 8) |
| 44 | |
| 45 | unsigned long iopm_base; |
| 46 | unsigned long msrpm_base; |
| 47 | |
| 48 | struct kvm_ldttss_desc { |
| 49 | u16 limit0; |
| 50 | u16 base0; |
| 51 | unsigned base1 : 8, type : 5, dpl : 2, p : 1; |
| 52 | unsigned limit1 : 4, zero0 : 3, g : 1, base2 : 8; |
| 53 | u32 base3; |
| 54 | u32 zero1; |
| 55 | } __attribute__((packed)); |
| 56 | |
| 57 | struct svm_cpu_data { |
| 58 | int cpu; |
| 59 | |
| 60 | uint64_t asid_generation; |
| 61 | uint32_t max_asid; |
| 62 | uint32_t next_asid; |
| 63 | struct kvm_ldttss_desc *tss_desc; |
| 64 | |
| 65 | struct page *save_area; |
| 66 | }; |
| 67 | |
| 68 | static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data); |
| 69 | |
| 70 | struct svm_init_data { |
| 71 | int cpu; |
| 72 | int r; |
| 73 | }; |
| 74 | |
| 75 | static u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000}; |
| 76 | |
| 77 | #define NUM_MSR_MAPS (sizeof(msrpm_ranges) / sizeof(*msrpm_ranges)) |
| 78 | #define MSRS_RANGE_SIZE 2048 |
| 79 | #define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2) |
| 80 | |
| 81 | #define MAX_INST_SIZE 15 |
| 82 | |
| 83 | static unsigned get_addr_size(struct kvm_vcpu *vcpu) |
| 84 | { |
| 85 | struct vmcb_save_area *sa = &vcpu->svm->vmcb->save; |
| 86 | u16 cs_attrib; |
| 87 | |
| 88 | if (!(sa->cr0 & CR0_PE_MASK) || (sa->rflags & X86_EFLAGS_VM)) |
| 89 | return 2; |
| 90 | |
| 91 | cs_attrib = sa->cs.attrib; |
| 92 | |
| 93 | return (cs_attrib & SVM_SELECTOR_L_MASK) ? 8 : |
| 94 | (cs_attrib & SVM_SELECTOR_DB_MASK) ? 4 : 2; |
| 95 | } |
| 96 | |
| 97 | static inline u8 pop_irq(struct kvm_vcpu *vcpu) |
| 98 | { |
| 99 | int word_index = __ffs(vcpu->irq_summary); |
| 100 | int bit_index = __ffs(vcpu->irq_pending[word_index]); |
| 101 | int irq = word_index * BITS_PER_LONG + bit_index; |
| 102 | |
| 103 | clear_bit(bit_index, &vcpu->irq_pending[word_index]); |
| 104 | if (!vcpu->irq_pending[word_index]) |
| 105 | clear_bit(word_index, &vcpu->irq_summary); |
| 106 | return irq; |
| 107 | } |
| 108 | |
| 109 | static inline void push_irq(struct kvm_vcpu *vcpu, u8 irq) |
| 110 | { |
| 111 | set_bit(irq, vcpu->irq_pending); |
| 112 | set_bit(irq / BITS_PER_LONG, &vcpu->irq_summary); |
| 113 | } |
| 114 | |
| 115 | static inline void clgi(void) |
| 116 | { |
| 117 | asm volatile (SVM_CLGI); |
| 118 | } |
| 119 | |
| 120 | static inline void stgi(void) |
| 121 | { |
| 122 | asm volatile (SVM_STGI); |
| 123 | } |
| 124 | |
| 125 | static inline void invlpga(unsigned long addr, u32 asid) |
| 126 | { |
| 127 | asm volatile (SVM_INVLPGA :: "a"(addr), "c"(asid)); |
| 128 | } |
| 129 | |
| 130 | static inline unsigned long kvm_read_cr2(void) |
| 131 | { |
| 132 | unsigned long cr2; |
| 133 | |
| 134 | asm volatile ("mov %%cr2, %0" : "=r" (cr2)); |
| 135 | return cr2; |
| 136 | } |
| 137 | |
| 138 | static inline void kvm_write_cr2(unsigned long val) |
| 139 | { |
| 140 | asm volatile ("mov %0, %%cr2" :: "r" (val)); |
| 141 | } |
| 142 | |
| 143 | static inline unsigned long read_dr6(void) |
| 144 | { |
| 145 | unsigned long dr6; |
| 146 | |
| 147 | asm volatile ("mov %%dr6, %0" : "=r" (dr6)); |
| 148 | return dr6; |
| 149 | } |
| 150 | |
| 151 | static inline void write_dr6(unsigned long val) |
| 152 | { |
| 153 | asm volatile ("mov %0, %%dr6" :: "r" (val)); |
| 154 | } |
| 155 | |
| 156 | static inline unsigned long read_dr7(void) |
| 157 | { |
| 158 | unsigned long dr7; |
| 159 | |
| 160 | asm volatile ("mov %%dr7, %0" : "=r" (dr7)); |
| 161 | return dr7; |
| 162 | } |
| 163 | |
| 164 | static inline void write_dr7(unsigned long val) |
| 165 | { |
| 166 | asm volatile ("mov %0, %%dr7" :: "r" (val)); |
| 167 | } |
| 168 | |
| 169 | static inline int svm_is_long_mode(struct kvm_vcpu *vcpu) |
| 170 | { |
| 171 | return vcpu->svm->vmcb->save.efer & KVM_EFER_LMA; |
| 172 | } |
| 173 | |
| 174 | static inline void force_new_asid(struct kvm_vcpu *vcpu) |
| 175 | { |
| 176 | vcpu->svm->asid_generation--; |
| 177 | } |
| 178 | |
| 179 | static inline void flush_guest_tlb(struct kvm_vcpu *vcpu) |
| 180 | { |
| 181 | force_new_asid(vcpu); |
| 182 | } |
| 183 | |
| 184 | static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer) |
| 185 | { |
| 186 | if (!(efer & KVM_EFER_LMA)) |
| 187 | efer &= ~KVM_EFER_LME; |
| 188 | |
| 189 | vcpu->svm->vmcb->save.efer = efer | MSR_EFER_SVME_MASK; |
| 190 | vcpu->shadow_efer = efer; |
| 191 | } |
| 192 | |
| 193 | static void svm_inject_gp(struct kvm_vcpu *vcpu, unsigned error_code) |
| 194 | { |
| 195 | vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | |
| 196 | SVM_EVTINJ_VALID_ERR | |
| 197 | SVM_EVTINJ_TYPE_EXEPT | |
| 198 | GP_VECTOR; |
| 199 | vcpu->svm->vmcb->control.event_inj_err = error_code; |
| 200 | } |
| 201 | |
| 202 | static void inject_ud(struct kvm_vcpu *vcpu) |
| 203 | { |
| 204 | vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | |
| 205 | SVM_EVTINJ_TYPE_EXEPT | |
| 206 | UD_VECTOR; |
| 207 | } |
| 208 | |
| 209 | static void inject_db(struct kvm_vcpu *vcpu) |
| 210 | { |
| 211 | vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | |
| 212 | SVM_EVTINJ_TYPE_EXEPT | |
| 213 | DB_VECTOR; |
| 214 | } |
| 215 | |
| 216 | static int is_page_fault(uint32_t info) |
| 217 | { |
| 218 | info &= SVM_EVTINJ_VEC_MASK | SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID; |
| 219 | return info == (PF_VECTOR | SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_EXEPT); |
| 220 | } |
| 221 | |
| 222 | static int is_external_interrupt(u32 info) |
| 223 | { |
| 224 | info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID; |
| 225 | return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR); |
| 226 | } |
| 227 | |
| 228 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) |
| 229 | { |
| 230 | if (!vcpu->svm->next_rip) { |
| 231 | printk(KERN_DEBUG "%s: NOP\n", __FUNCTION__); |
| 232 | return; |
| 233 | } |
| 234 | if (vcpu->svm->next_rip - vcpu->svm->vmcb->save.rip > 15) { |
| 235 | printk(KERN_ERR "%s: ip 0x%llx next 0x%llx\n", |
| 236 | __FUNCTION__, |
| 237 | vcpu->svm->vmcb->save.rip, |
| 238 | vcpu->svm->next_rip); |
| 239 | } |
| 240 | |
| 241 | vcpu->rip = vcpu->svm->vmcb->save.rip = vcpu->svm->next_rip; |
| 242 | vcpu->svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK; |
| 243 | } |
| 244 | |
| 245 | static int has_svm(void) |
| 246 | { |
| 247 | uint32_t eax, ebx, ecx, edx; |
| 248 | |
| 249 | if (current_cpu_data.x86_vendor != X86_VENDOR_AMD) { |
| 250 | printk(KERN_INFO "has_svm: not amd\n"); |
| 251 | return 0; |
| 252 | } |
| 253 | |
| 254 | cpuid(0x80000000, &eax, &ebx, &ecx, &edx); |
| 255 | if (eax < SVM_CPUID_FUNC) { |
| 256 | printk(KERN_INFO "has_svm: can't execute cpuid_8000000a\n"); |
| 257 | return 0; |
| 258 | } |
| 259 | |
| 260 | cpuid(0x80000001, &eax, &ebx, &ecx, &edx); |
| 261 | if (!(ecx & (1 << SVM_CPUID_FEATURE_SHIFT))) { |
| 262 | printk(KERN_DEBUG "has_svm: svm not available\n"); |
| 263 | return 0; |
| 264 | } |
| 265 | return 1; |
| 266 | } |
| 267 | |
| 268 | static void svm_hardware_disable(void *garbage) |
| 269 | { |
| 270 | struct svm_cpu_data *svm_data |
| 271 | = per_cpu(svm_data, raw_smp_processor_id()); |
| 272 | |
| 273 | if (svm_data) { |
| 274 | uint64_t efer; |
| 275 | |
| 276 | wrmsrl(MSR_VM_HSAVE_PA, 0); |
| 277 | rdmsrl(MSR_EFER, efer); |
| 278 | wrmsrl(MSR_EFER, efer & ~MSR_EFER_SVME_MASK); |
| 279 | per_cpu(svm_data, raw_smp_processor_id()) = 0; |
| 280 | __free_page(svm_data->save_area); |
| 281 | kfree(svm_data); |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | static void svm_hardware_enable(void *garbage) |
| 286 | { |
| 287 | |
| 288 | struct svm_cpu_data *svm_data; |
| 289 | uint64_t efer; |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 290 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 291 | struct desc_ptr gdt_descr; |
| 292 | #else |
| 293 | struct Xgt_desc_struct gdt_descr; |
| 294 | #endif |
| 295 | struct desc_struct *gdt; |
| 296 | int me = raw_smp_processor_id(); |
| 297 | |
| 298 | if (!has_svm()) { |
| 299 | printk(KERN_ERR "svm_cpu_init: err EOPNOTSUPP on %d\n", me); |
| 300 | return; |
| 301 | } |
| 302 | svm_data = per_cpu(svm_data, me); |
| 303 | |
| 304 | if (!svm_data) { |
| 305 | printk(KERN_ERR "svm_cpu_init: svm_data is NULL on %d\n", |
| 306 | me); |
| 307 | return; |
| 308 | } |
| 309 | |
| 310 | svm_data->asid_generation = 1; |
| 311 | svm_data->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1; |
| 312 | svm_data->next_asid = svm_data->max_asid + 1; |
| 313 | |
| 314 | asm volatile ( "sgdt %0" : "=m"(gdt_descr) ); |
| 315 | gdt = (struct desc_struct *)gdt_descr.address; |
| 316 | svm_data->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS); |
| 317 | |
| 318 | rdmsrl(MSR_EFER, efer); |
| 319 | wrmsrl(MSR_EFER, efer | MSR_EFER_SVME_MASK); |
| 320 | |
| 321 | wrmsrl(MSR_VM_HSAVE_PA, |
| 322 | page_to_pfn(svm_data->save_area) << PAGE_SHIFT); |
| 323 | } |
| 324 | |
| 325 | static int svm_cpu_init(int cpu) |
| 326 | { |
| 327 | struct svm_cpu_data *svm_data; |
| 328 | int r; |
| 329 | |
| 330 | svm_data = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL); |
| 331 | if (!svm_data) |
| 332 | return -ENOMEM; |
| 333 | svm_data->cpu = cpu; |
| 334 | svm_data->save_area = alloc_page(GFP_KERNEL); |
| 335 | r = -ENOMEM; |
| 336 | if (!svm_data->save_area) |
| 337 | goto err_1; |
| 338 | |
| 339 | per_cpu(svm_data, cpu) = svm_data; |
| 340 | |
| 341 | return 0; |
| 342 | |
| 343 | err_1: |
| 344 | kfree(svm_data); |
| 345 | return r; |
| 346 | |
| 347 | } |
| 348 | |
| 349 | static int set_msr_interception(u32 *msrpm, unsigned msr, |
| 350 | int read, int write) |
| 351 | { |
| 352 | int i; |
| 353 | |
| 354 | for (i = 0; i < NUM_MSR_MAPS; i++) { |
| 355 | if (msr >= msrpm_ranges[i] && |
| 356 | msr < msrpm_ranges[i] + MSRS_IN_RANGE) { |
| 357 | u32 msr_offset = (i * MSRS_IN_RANGE + msr - |
| 358 | msrpm_ranges[i]) * 2; |
| 359 | |
| 360 | u32 *base = msrpm + (msr_offset / 32); |
| 361 | u32 msr_shift = msr_offset % 32; |
| 362 | u32 mask = ((write) ? 0 : 2) | ((read) ? 0 : 1); |
| 363 | *base = (*base & ~(0x3 << msr_shift)) | |
| 364 | (mask << msr_shift); |
| 365 | return 1; |
| 366 | } |
| 367 | } |
| 368 | printk(KERN_DEBUG "%s: not found 0x%x\n", __FUNCTION__, msr); |
| 369 | return 0; |
| 370 | } |
| 371 | |
| 372 | static __init int svm_hardware_setup(void) |
| 373 | { |
| 374 | int cpu; |
| 375 | struct page *iopm_pages; |
| 376 | struct page *msrpm_pages; |
| 377 | void *msrpm_va; |
| 378 | int r; |
| 379 | |
Avi Kivity | 873a7c4 | 2006-12-13 00:34:14 -0800 | [diff] [blame^] | 380 | kvm_emulator_want_group7_invlpg(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 381 | |
| 382 | iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER); |
| 383 | |
| 384 | if (!iopm_pages) |
| 385 | return -ENOMEM; |
| 386 | memset(page_address(iopm_pages), 0xff, |
| 387 | PAGE_SIZE * (1 << IOPM_ALLOC_ORDER)); |
| 388 | iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT; |
| 389 | |
| 390 | |
| 391 | msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER); |
| 392 | |
| 393 | r = -ENOMEM; |
| 394 | if (!msrpm_pages) |
| 395 | goto err_1; |
| 396 | |
| 397 | msrpm_va = page_address(msrpm_pages); |
| 398 | memset(msrpm_va, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER)); |
| 399 | msrpm_base = page_to_pfn(msrpm_pages) << PAGE_SHIFT; |
| 400 | |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 401 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 402 | set_msr_interception(msrpm_va, MSR_GS_BASE, 1, 1); |
| 403 | set_msr_interception(msrpm_va, MSR_FS_BASE, 1, 1); |
| 404 | set_msr_interception(msrpm_va, MSR_KERNEL_GS_BASE, 1, 1); |
| 405 | set_msr_interception(msrpm_va, MSR_STAR, 1, 1); |
| 406 | set_msr_interception(msrpm_va, MSR_LSTAR, 1, 1); |
| 407 | set_msr_interception(msrpm_va, MSR_CSTAR, 1, 1); |
| 408 | set_msr_interception(msrpm_va, MSR_SYSCALL_MASK, 1, 1); |
| 409 | #endif |
| 410 | set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_CS, 1, 1); |
| 411 | set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_ESP, 1, 1); |
| 412 | set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_EIP, 1, 1); |
| 413 | |
| 414 | for_each_online_cpu(cpu) { |
| 415 | r = svm_cpu_init(cpu); |
| 416 | if (r) |
| 417 | goto err_2; |
| 418 | } |
| 419 | return 0; |
| 420 | |
| 421 | err_2: |
| 422 | __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER); |
| 423 | msrpm_base = 0; |
| 424 | err_1: |
| 425 | __free_pages(iopm_pages, IOPM_ALLOC_ORDER); |
| 426 | iopm_base = 0; |
| 427 | return r; |
| 428 | } |
| 429 | |
| 430 | static __exit void svm_hardware_unsetup(void) |
| 431 | { |
| 432 | __free_pages(pfn_to_page(msrpm_base >> PAGE_SHIFT), MSRPM_ALLOC_ORDER); |
| 433 | __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER); |
| 434 | iopm_base = msrpm_base = 0; |
| 435 | } |
| 436 | |
| 437 | static void init_seg(struct vmcb_seg *seg) |
| 438 | { |
| 439 | seg->selector = 0; |
| 440 | seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK | |
| 441 | SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */ |
| 442 | seg->limit = 0xffff; |
| 443 | seg->base = 0; |
| 444 | } |
| 445 | |
| 446 | static void init_sys_seg(struct vmcb_seg *seg, uint32_t type) |
| 447 | { |
| 448 | seg->selector = 0; |
| 449 | seg->attrib = SVM_SELECTOR_P_MASK | type; |
| 450 | seg->limit = 0xffff; |
| 451 | seg->base = 0; |
| 452 | } |
| 453 | |
| 454 | static int svm_vcpu_setup(struct kvm_vcpu *vcpu) |
| 455 | { |
| 456 | return 0; |
| 457 | } |
| 458 | |
| 459 | static void init_vmcb(struct vmcb *vmcb) |
| 460 | { |
| 461 | struct vmcb_control_area *control = &vmcb->control; |
| 462 | struct vmcb_save_area *save = &vmcb->save; |
| 463 | u64 tsc; |
| 464 | |
| 465 | control->intercept_cr_read = INTERCEPT_CR0_MASK | |
| 466 | INTERCEPT_CR3_MASK | |
| 467 | INTERCEPT_CR4_MASK; |
| 468 | |
| 469 | control->intercept_cr_write = INTERCEPT_CR0_MASK | |
| 470 | INTERCEPT_CR3_MASK | |
| 471 | INTERCEPT_CR4_MASK; |
| 472 | |
| 473 | control->intercept_dr_read = INTERCEPT_DR0_MASK | |
| 474 | INTERCEPT_DR1_MASK | |
| 475 | INTERCEPT_DR2_MASK | |
| 476 | INTERCEPT_DR3_MASK; |
| 477 | |
| 478 | control->intercept_dr_write = INTERCEPT_DR0_MASK | |
| 479 | INTERCEPT_DR1_MASK | |
| 480 | INTERCEPT_DR2_MASK | |
| 481 | INTERCEPT_DR3_MASK | |
| 482 | INTERCEPT_DR5_MASK | |
| 483 | INTERCEPT_DR7_MASK; |
| 484 | |
| 485 | control->intercept_exceptions = 1 << PF_VECTOR; |
| 486 | |
| 487 | |
| 488 | control->intercept = (1ULL << INTERCEPT_INTR) | |
| 489 | (1ULL << INTERCEPT_NMI) | |
| 490 | /* |
| 491 | * selective cr0 intercept bug? |
| 492 | * 0: 0f 22 d8 mov %eax,%cr3 |
| 493 | * 3: 0f 20 c0 mov %cr0,%eax |
| 494 | * 6: 0d 00 00 00 80 or $0x80000000,%eax |
| 495 | * b: 0f 22 c0 mov %eax,%cr0 |
| 496 | * set cr3 ->interception |
| 497 | * get cr0 ->interception |
| 498 | * set cr0 -> no interception |
| 499 | */ |
| 500 | /* (1ULL << INTERCEPT_SELECTIVE_CR0) | */ |
| 501 | (1ULL << INTERCEPT_CPUID) | |
| 502 | (1ULL << INTERCEPT_HLT) | |
| 503 | (1ULL << INTERCEPT_INVLPG) | |
| 504 | (1ULL << INTERCEPT_INVLPGA) | |
| 505 | (1ULL << INTERCEPT_IOIO_PROT) | |
| 506 | (1ULL << INTERCEPT_MSR_PROT) | |
| 507 | (1ULL << INTERCEPT_TASK_SWITCH) | |
| 508 | (1ULL << INTERCEPT_VMRUN) | |
| 509 | (1ULL << INTERCEPT_VMMCALL) | |
| 510 | (1ULL << INTERCEPT_VMLOAD) | |
| 511 | (1ULL << INTERCEPT_VMSAVE) | |
| 512 | (1ULL << INTERCEPT_STGI) | |
| 513 | (1ULL << INTERCEPT_CLGI) | |
| 514 | (1ULL << INTERCEPT_SKINIT); |
| 515 | |
| 516 | control->iopm_base_pa = iopm_base; |
| 517 | control->msrpm_base_pa = msrpm_base; |
| 518 | rdtscll(tsc); |
| 519 | control->tsc_offset = -tsc; |
| 520 | control->int_ctl = V_INTR_MASKING_MASK; |
| 521 | |
| 522 | init_seg(&save->es); |
| 523 | init_seg(&save->ss); |
| 524 | init_seg(&save->ds); |
| 525 | init_seg(&save->fs); |
| 526 | init_seg(&save->gs); |
| 527 | |
| 528 | save->cs.selector = 0xf000; |
| 529 | /* Executable/Readable Code Segment */ |
| 530 | save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK | |
| 531 | SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK; |
| 532 | save->cs.limit = 0xffff; |
| 533 | save->cs.base = 0xffff0000; |
| 534 | |
| 535 | save->gdtr.limit = 0xffff; |
| 536 | save->idtr.limit = 0xffff; |
| 537 | |
| 538 | init_sys_seg(&save->ldtr, SEG_TYPE_LDT); |
| 539 | init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16); |
| 540 | |
| 541 | save->efer = MSR_EFER_SVME_MASK; |
| 542 | |
| 543 | save->dr6 = 0xffff0ff0; |
| 544 | save->dr7 = 0x400; |
| 545 | save->rflags = 2; |
| 546 | save->rip = 0x0000fff0; |
| 547 | |
| 548 | /* |
| 549 | * cr0 val on cpu init should be 0x60000010, we enable cpu |
| 550 | * cache by default. the orderly way is to enable cache in bios. |
| 551 | */ |
| 552 | save->cr0 = 0x00000010 | CR0_PG_MASK; |
| 553 | save->cr4 = CR4_PAE_MASK; |
| 554 | /* rdx = ?? */ |
| 555 | } |
| 556 | |
| 557 | static int svm_create_vcpu(struct kvm_vcpu *vcpu) |
| 558 | { |
| 559 | struct page *page; |
| 560 | int r; |
| 561 | |
| 562 | r = -ENOMEM; |
| 563 | vcpu->svm = kzalloc(sizeof *vcpu->svm, GFP_KERNEL); |
| 564 | if (!vcpu->svm) |
| 565 | goto out1; |
| 566 | page = alloc_page(GFP_KERNEL); |
| 567 | if (!page) |
| 568 | goto out2; |
| 569 | |
| 570 | vcpu->svm->vmcb = page_address(page); |
| 571 | memset(vcpu->svm->vmcb, 0, PAGE_SIZE); |
| 572 | vcpu->svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT; |
| 573 | vcpu->svm->cr0 = 0x00000010; |
| 574 | vcpu->svm->asid_generation = 0; |
| 575 | memset(vcpu->svm->db_regs, 0, sizeof(vcpu->svm->db_regs)); |
| 576 | init_vmcb(vcpu->svm->vmcb); |
| 577 | |
| 578 | return 0; |
| 579 | |
| 580 | out2: |
| 581 | kfree(vcpu->svm); |
| 582 | out1: |
| 583 | return r; |
| 584 | } |
| 585 | |
| 586 | static void svm_free_vcpu(struct kvm_vcpu *vcpu) |
| 587 | { |
| 588 | if (!vcpu->svm) |
| 589 | return; |
| 590 | if (vcpu->svm->vmcb) |
| 591 | __free_page(pfn_to_page(vcpu->svm->vmcb_pa >> PAGE_SHIFT)); |
| 592 | kfree(vcpu->svm); |
| 593 | } |
| 594 | |
| 595 | static struct kvm_vcpu *svm_vcpu_load(struct kvm_vcpu *vcpu) |
| 596 | { |
| 597 | get_cpu(); |
| 598 | return vcpu; |
| 599 | } |
| 600 | |
| 601 | static void svm_vcpu_put(struct kvm_vcpu *vcpu) |
| 602 | { |
| 603 | put_cpu(); |
| 604 | } |
| 605 | |
| 606 | static void svm_cache_regs(struct kvm_vcpu *vcpu) |
| 607 | { |
| 608 | vcpu->regs[VCPU_REGS_RAX] = vcpu->svm->vmcb->save.rax; |
| 609 | vcpu->regs[VCPU_REGS_RSP] = vcpu->svm->vmcb->save.rsp; |
| 610 | vcpu->rip = vcpu->svm->vmcb->save.rip; |
| 611 | } |
| 612 | |
| 613 | static void svm_decache_regs(struct kvm_vcpu *vcpu) |
| 614 | { |
| 615 | vcpu->svm->vmcb->save.rax = vcpu->regs[VCPU_REGS_RAX]; |
| 616 | vcpu->svm->vmcb->save.rsp = vcpu->regs[VCPU_REGS_RSP]; |
| 617 | vcpu->svm->vmcb->save.rip = vcpu->rip; |
| 618 | } |
| 619 | |
| 620 | static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu) |
| 621 | { |
| 622 | return vcpu->svm->vmcb->save.rflags; |
| 623 | } |
| 624 | |
| 625 | static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) |
| 626 | { |
| 627 | vcpu->svm->vmcb->save.rflags = rflags; |
| 628 | } |
| 629 | |
| 630 | static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg) |
| 631 | { |
| 632 | struct vmcb_save_area *save = &vcpu->svm->vmcb->save; |
| 633 | |
| 634 | switch (seg) { |
| 635 | case VCPU_SREG_CS: return &save->cs; |
| 636 | case VCPU_SREG_DS: return &save->ds; |
| 637 | case VCPU_SREG_ES: return &save->es; |
| 638 | case VCPU_SREG_FS: return &save->fs; |
| 639 | case VCPU_SREG_GS: return &save->gs; |
| 640 | case VCPU_SREG_SS: return &save->ss; |
| 641 | case VCPU_SREG_TR: return &save->tr; |
| 642 | case VCPU_SREG_LDTR: return &save->ldtr; |
| 643 | } |
| 644 | BUG(); |
| 645 | return 0; |
| 646 | } |
| 647 | |
| 648 | static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg) |
| 649 | { |
| 650 | struct vmcb_seg *s = svm_seg(vcpu, seg); |
| 651 | |
| 652 | return s->base; |
| 653 | } |
| 654 | |
| 655 | static void svm_get_segment(struct kvm_vcpu *vcpu, |
| 656 | struct kvm_segment *var, int seg) |
| 657 | { |
| 658 | struct vmcb_seg *s = svm_seg(vcpu, seg); |
| 659 | |
| 660 | var->base = s->base; |
| 661 | var->limit = s->limit; |
| 662 | var->selector = s->selector; |
| 663 | var->type = s->attrib & SVM_SELECTOR_TYPE_MASK; |
| 664 | var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1; |
| 665 | var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3; |
| 666 | var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1; |
| 667 | var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1; |
| 668 | var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1; |
| 669 | var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1; |
| 670 | var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1; |
| 671 | var->unusable = !var->present; |
| 672 | } |
| 673 | |
| 674 | static void svm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
| 675 | { |
| 676 | struct vmcb_seg *s = svm_seg(vcpu, VCPU_SREG_CS); |
| 677 | |
| 678 | *db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1; |
| 679 | *l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1; |
| 680 | } |
| 681 | |
| 682 | static void svm_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 683 | { |
| 684 | dt->limit = vcpu->svm->vmcb->save.ldtr.limit; |
| 685 | dt->base = vcpu->svm->vmcb->save.ldtr.base; |
| 686 | } |
| 687 | |
| 688 | static void svm_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 689 | { |
| 690 | vcpu->svm->vmcb->save.ldtr.limit = dt->limit; |
| 691 | vcpu->svm->vmcb->save.ldtr.base = dt->base ; |
| 692 | } |
| 693 | |
| 694 | static void svm_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 695 | { |
| 696 | dt->limit = vcpu->svm->vmcb->save.gdtr.limit; |
| 697 | dt->base = vcpu->svm->vmcb->save.gdtr.base; |
| 698 | } |
| 699 | |
| 700 | static void svm_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
| 701 | { |
| 702 | vcpu->svm->vmcb->save.gdtr.limit = dt->limit; |
| 703 | vcpu->svm->vmcb->save.gdtr.base = dt->base ; |
| 704 | } |
| 705 | |
| 706 | static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
| 707 | { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 708 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 709 | if (vcpu->shadow_efer & KVM_EFER_LME) { |
| 710 | if (!is_paging(vcpu) && (cr0 & CR0_PG_MASK)) { |
| 711 | vcpu->shadow_efer |= KVM_EFER_LMA; |
| 712 | vcpu->svm->vmcb->save.efer |= KVM_EFER_LMA | KVM_EFER_LME; |
| 713 | } |
| 714 | |
| 715 | if (is_paging(vcpu) && !(cr0 & CR0_PG_MASK) ) { |
| 716 | vcpu->shadow_efer &= ~KVM_EFER_LMA; |
| 717 | vcpu->svm->vmcb->save.efer &= ~(KVM_EFER_LMA | KVM_EFER_LME); |
| 718 | } |
| 719 | } |
| 720 | #endif |
| 721 | vcpu->svm->cr0 = cr0; |
| 722 | vcpu->svm->vmcb->save.cr0 = cr0 | CR0_PG_MASK; |
| 723 | vcpu->cr0 = cr0; |
| 724 | } |
| 725 | |
| 726 | static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
| 727 | { |
| 728 | vcpu->cr4 = cr4; |
| 729 | vcpu->svm->vmcb->save.cr4 = cr4 | CR4_PAE_MASK; |
| 730 | } |
| 731 | |
| 732 | static void svm_set_segment(struct kvm_vcpu *vcpu, |
| 733 | struct kvm_segment *var, int seg) |
| 734 | { |
| 735 | struct vmcb_seg *s = svm_seg(vcpu, seg); |
| 736 | |
| 737 | s->base = var->base; |
| 738 | s->limit = var->limit; |
| 739 | s->selector = var->selector; |
| 740 | if (var->unusable) |
| 741 | s->attrib = 0; |
| 742 | else { |
| 743 | s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK); |
| 744 | s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT; |
| 745 | s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT; |
| 746 | s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT; |
| 747 | s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT; |
| 748 | s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT; |
| 749 | s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT; |
| 750 | s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT; |
| 751 | } |
| 752 | if (seg == VCPU_SREG_CS) |
| 753 | vcpu->svm->vmcb->save.cpl |
| 754 | = (vcpu->svm->vmcb->save.cs.attrib |
| 755 | >> SVM_SELECTOR_DPL_SHIFT) & 3; |
| 756 | |
| 757 | } |
| 758 | |
| 759 | /* FIXME: |
| 760 | |
| 761 | vcpu->svm->vmcb->control.int_ctl &= ~V_TPR_MASK; |
| 762 | vcpu->svm->vmcb->control.int_ctl |= (sregs->cr8 & V_TPR_MASK); |
| 763 | |
| 764 | */ |
| 765 | |
| 766 | static int svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg) |
| 767 | { |
| 768 | return -EOPNOTSUPP; |
| 769 | } |
| 770 | |
| 771 | static void load_host_msrs(struct kvm_vcpu *vcpu) |
| 772 | { |
| 773 | int i; |
| 774 | |
| 775 | for ( i = 0; i < NR_HOST_SAVE_MSRS; i++) |
| 776 | wrmsrl(host_save_msrs[i], vcpu->svm->host_msrs[i]); |
| 777 | } |
| 778 | |
| 779 | static void save_host_msrs(struct kvm_vcpu *vcpu) |
| 780 | { |
| 781 | int i; |
| 782 | |
| 783 | for ( i = 0; i < NR_HOST_SAVE_MSRS; i++) |
| 784 | rdmsrl(host_save_msrs[i], vcpu->svm->host_msrs[i]); |
| 785 | } |
| 786 | |
| 787 | static void new_asid(struct kvm_vcpu *vcpu, struct svm_cpu_data *svm_data) |
| 788 | { |
| 789 | if (svm_data->next_asid > svm_data->max_asid) { |
| 790 | ++svm_data->asid_generation; |
| 791 | svm_data->next_asid = 1; |
| 792 | vcpu->svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID; |
| 793 | } |
| 794 | |
| 795 | vcpu->cpu = svm_data->cpu; |
| 796 | vcpu->svm->asid_generation = svm_data->asid_generation; |
| 797 | vcpu->svm->vmcb->control.asid = svm_data->next_asid++; |
| 798 | } |
| 799 | |
| 800 | static void svm_invlpg(struct kvm_vcpu *vcpu, gva_t address) |
| 801 | { |
| 802 | invlpga(address, vcpu->svm->vmcb->control.asid); // is needed? |
| 803 | } |
| 804 | |
| 805 | static unsigned long svm_get_dr(struct kvm_vcpu *vcpu, int dr) |
| 806 | { |
| 807 | return vcpu->svm->db_regs[dr]; |
| 808 | } |
| 809 | |
| 810 | static void svm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long value, |
| 811 | int *exception) |
| 812 | { |
| 813 | *exception = 0; |
| 814 | |
| 815 | if (vcpu->svm->vmcb->save.dr7 & DR7_GD_MASK) { |
| 816 | vcpu->svm->vmcb->save.dr7 &= ~DR7_GD_MASK; |
| 817 | vcpu->svm->vmcb->save.dr6 |= DR6_BD_MASK; |
| 818 | *exception = DB_VECTOR; |
| 819 | return; |
| 820 | } |
| 821 | |
| 822 | switch (dr) { |
| 823 | case 0 ... 3: |
| 824 | vcpu->svm->db_regs[dr] = value; |
| 825 | return; |
| 826 | case 4 ... 5: |
| 827 | if (vcpu->cr4 & CR4_DE_MASK) { |
| 828 | *exception = UD_VECTOR; |
| 829 | return; |
| 830 | } |
| 831 | case 7: { |
| 832 | if (value & ~((1ULL << 32) - 1)) { |
| 833 | *exception = GP_VECTOR; |
| 834 | return; |
| 835 | } |
| 836 | vcpu->svm->vmcb->save.dr7 = value; |
| 837 | return; |
| 838 | } |
| 839 | default: |
| 840 | printk(KERN_DEBUG "%s: unexpected dr %u\n", |
| 841 | __FUNCTION__, dr); |
| 842 | *exception = UD_VECTOR; |
| 843 | return; |
| 844 | } |
| 845 | } |
| 846 | |
| 847 | static int pf_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 848 | { |
| 849 | u32 exit_int_info = vcpu->svm->vmcb->control.exit_int_info; |
| 850 | u64 fault_address; |
| 851 | u32 error_code; |
| 852 | enum emulation_result er; |
| 853 | |
| 854 | if (is_external_interrupt(exit_int_info)) |
| 855 | push_irq(vcpu, exit_int_info & SVM_EVTINJ_VEC_MASK); |
| 856 | |
| 857 | spin_lock(&vcpu->kvm->lock); |
| 858 | |
| 859 | fault_address = vcpu->svm->vmcb->control.exit_info_2; |
| 860 | error_code = vcpu->svm->vmcb->control.exit_info_1; |
| 861 | if (!vcpu->mmu.page_fault(vcpu, fault_address, error_code)) { |
| 862 | spin_unlock(&vcpu->kvm->lock); |
| 863 | return 1; |
| 864 | } |
| 865 | er = emulate_instruction(vcpu, kvm_run, fault_address, error_code); |
| 866 | spin_unlock(&vcpu->kvm->lock); |
| 867 | |
| 868 | switch (er) { |
| 869 | case EMULATE_DONE: |
| 870 | return 1; |
| 871 | case EMULATE_DO_MMIO: |
| 872 | ++kvm_stat.mmio_exits; |
| 873 | kvm_run->exit_reason = KVM_EXIT_MMIO; |
| 874 | return 0; |
| 875 | case EMULATE_FAIL: |
| 876 | vcpu_printf(vcpu, "%s: emulate fail\n", __FUNCTION__); |
| 877 | break; |
| 878 | default: |
| 879 | BUG(); |
| 880 | } |
| 881 | |
| 882 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; |
| 883 | return 0; |
| 884 | } |
| 885 | |
| 886 | static int io_get_override(struct kvm_vcpu *vcpu, |
| 887 | struct vmcb_seg **seg, |
| 888 | int *addr_override) |
| 889 | { |
| 890 | u8 inst[MAX_INST_SIZE]; |
| 891 | unsigned ins_length; |
| 892 | gva_t rip; |
| 893 | int i; |
| 894 | |
| 895 | rip = vcpu->svm->vmcb->save.rip; |
| 896 | ins_length = vcpu->svm->next_rip - rip; |
| 897 | rip += vcpu->svm->vmcb->save.cs.base; |
| 898 | |
| 899 | if (ins_length > MAX_INST_SIZE) |
| 900 | printk(KERN_DEBUG |
| 901 | "%s: inst length err, cs base 0x%llx rip 0x%llx " |
| 902 | "next rip 0x%llx ins_length %u\n", |
| 903 | __FUNCTION__, |
| 904 | vcpu->svm->vmcb->save.cs.base, |
| 905 | vcpu->svm->vmcb->save.rip, |
| 906 | vcpu->svm->vmcb->control.exit_info_2, |
| 907 | ins_length); |
| 908 | |
| 909 | if (kvm_read_guest(vcpu, rip, ins_length, inst) != ins_length) |
| 910 | /* #PF */ |
| 911 | return 0; |
| 912 | |
| 913 | *addr_override = 0; |
| 914 | *seg = 0; |
| 915 | for (i = 0; i < ins_length; i++) |
| 916 | switch (inst[i]) { |
| 917 | case 0xf0: |
| 918 | case 0xf2: |
| 919 | case 0xf3: |
| 920 | case 0x66: |
| 921 | continue; |
| 922 | case 0x67: |
| 923 | *addr_override = 1; |
| 924 | continue; |
| 925 | case 0x2e: |
| 926 | *seg = &vcpu->svm->vmcb->save.cs; |
| 927 | continue; |
| 928 | case 0x36: |
| 929 | *seg = &vcpu->svm->vmcb->save.ss; |
| 930 | continue; |
| 931 | case 0x3e: |
| 932 | *seg = &vcpu->svm->vmcb->save.ds; |
| 933 | continue; |
| 934 | case 0x26: |
| 935 | *seg = &vcpu->svm->vmcb->save.es; |
| 936 | continue; |
| 937 | case 0x64: |
| 938 | *seg = &vcpu->svm->vmcb->save.fs; |
| 939 | continue; |
| 940 | case 0x65: |
| 941 | *seg = &vcpu->svm->vmcb->save.gs; |
| 942 | continue; |
| 943 | default: |
| 944 | return 1; |
| 945 | } |
| 946 | printk(KERN_DEBUG "%s: unexpected\n", __FUNCTION__); |
| 947 | return 0; |
| 948 | } |
| 949 | |
| 950 | static unsigned long io_adress(struct kvm_vcpu *vcpu, int ins, u64 *address) |
| 951 | { |
| 952 | unsigned long addr_mask; |
| 953 | unsigned long *reg; |
| 954 | struct vmcb_seg *seg; |
| 955 | int addr_override; |
| 956 | struct vmcb_save_area *save_area = &vcpu->svm->vmcb->save; |
| 957 | u16 cs_attrib = save_area->cs.attrib; |
| 958 | unsigned addr_size = get_addr_size(vcpu); |
| 959 | |
| 960 | if (!io_get_override(vcpu, &seg, &addr_override)) |
| 961 | return 0; |
| 962 | |
| 963 | if (addr_override) |
| 964 | addr_size = (addr_size == 2) ? 4: (addr_size >> 1); |
| 965 | |
| 966 | if (ins) { |
| 967 | reg = &vcpu->regs[VCPU_REGS_RDI]; |
| 968 | seg = &vcpu->svm->vmcb->save.es; |
| 969 | } else { |
| 970 | reg = &vcpu->regs[VCPU_REGS_RSI]; |
| 971 | seg = (seg) ? seg : &vcpu->svm->vmcb->save.ds; |
| 972 | } |
| 973 | |
| 974 | addr_mask = ~0ULL >> (64 - (addr_size * 8)); |
| 975 | |
| 976 | if ((cs_attrib & SVM_SELECTOR_L_MASK) && |
| 977 | !(vcpu->svm->vmcb->save.rflags & X86_EFLAGS_VM)) { |
| 978 | *address = (*reg & addr_mask); |
| 979 | return addr_mask; |
| 980 | } |
| 981 | |
| 982 | if (!(seg->attrib & SVM_SELECTOR_P_SHIFT)) { |
| 983 | svm_inject_gp(vcpu, 0); |
| 984 | return 0; |
| 985 | } |
| 986 | |
| 987 | *address = (*reg & addr_mask) + seg->base; |
| 988 | return addr_mask; |
| 989 | } |
| 990 | |
| 991 | static int io_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 992 | { |
| 993 | u32 io_info = vcpu->svm->vmcb->control.exit_info_1; //address size bug? |
| 994 | int _in = io_info & SVM_IOIO_TYPE_MASK; |
| 995 | |
| 996 | ++kvm_stat.io_exits; |
| 997 | |
| 998 | vcpu->svm->next_rip = vcpu->svm->vmcb->control.exit_info_2; |
| 999 | |
| 1000 | kvm_run->exit_reason = KVM_EXIT_IO; |
| 1001 | kvm_run->io.port = io_info >> 16; |
| 1002 | kvm_run->io.direction = (_in) ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; |
| 1003 | kvm_run->io.size = ((io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT); |
| 1004 | kvm_run->io.string = (io_info & SVM_IOIO_STR_MASK) != 0; |
| 1005 | kvm_run->io.rep = (io_info & SVM_IOIO_REP_MASK) != 0; |
| 1006 | |
| 1007 | if (kvm_run->io.string) { |
| 1008 | unsigned addr_mask; |
| 1009 | |
| 1010 | addr_mask = io_adress(vcpu, _in, &kvm_run->io.address); |
| 1011 | if (!addr_mask) { |
| 1012 | printk(KERN_DEBUG "%s: get io address failed\n", __FUNCTION__); |
| 1013 | return 1; |
| 1014 | } |
| 1015 | |
| 1016 | if (kvm_run->io.rep) { |
| 1017 | kvm_run->io.count = vcpu->regs[VCPU_REGS_RCX] & addr_mask; |
| 1018 | kvm_run->io.string_down = (vcpu->svm->vmcb->save.rflags |
| 1019 | & X86_EFLAGS_DF) != 0; |
| 1020 | } |
| 1021 | } else { |
| 1022 | kvm_run->io.value = vcpu->svm->vmcb->save.rax; |
| 1023 | } |
| 1024 | return 0; |
| 1025 | } |
| 1026 | |
| 1027 | |
| 1028 | static int nop_on_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1029 | { |
| 1030 | return 1; |
| 1031 | } |
| 1032 | |
| 1033 | static int halt_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1034 | { |
| 1035 | vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 1; |
| 1036 | skip_emulated_instruction(vcpu); |
| 1037 | if (vcpu->irq_summary && (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF)) |
| 1038 | return 1; |
| 1039 | |
| 1040 | kvm_run->exit_reason = KVM_EXIT_HLT; |
| 1041 | return 0; |
| 1042 | } |
| 1043 | |
| 1044 | static int invalid_op_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1045 | { |
| 1046 | inject_ud(vcpu); |
| 1047 | return 1; |
| 1048 | } |
| 1049 | |
| 1050 | static int task_switch_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1051 | { |
| 1052 | printk(KERN_DEBUG "%s: task swiche is unsupported\n", __FUNCTION__); |
| 1053 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; |
| 1054 | return 0; |
| 1055 | } |
| 1056 | |
| 1057 | static int cpuid_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1058 | { |
| 1059 | vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2; |
| 1060 | kvm_run->exit_reason = KVM_EXIT_CPUID; |
| 1061 | return 0; |
| 1062 | } |
| 1063 | |
| 1064 | static int emulate_on_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1065 | { |
| 1066 | if (emulate_instruction(vcpu, 0, 0, 0) != EMULATE_DONE) |
| 1067 | printk(KERN_ERR "%s: failed\n", __FUNCTION__); |
| 1068 | return 1; |
| 1069 | } |
| 1070 | |
| 1071 | static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data) |
| 1072 | { |
| 1073 | switch (ecx) { |
| 1074 | case MSR_IA32_MC0_CTL: |
| 1075 | case MSR_IA32_MCG_STATUS: |
| 1076 | case MSR_IA32_MCG_CAP: |
| 1077 | case MSR_IA32_MC0_MISC: |
| 1078 | case MSR_IA32_MC0_MISC+4: |
| 1079 | case MSR_IA32_MC0_MISC+8: |
| 1080 | case MSR_IA32_MC0_MISC+12: |
| 1081 | case MSR_IA32_MC0_MISC+16: |
| 1082 | case MSR_IA32_UCODE_REV: |
| 1083 | /* MTRR registers */ |
| 1084 | case 0xfe: |
| 1085 | case 0x200 ... 0x2ff: |
| 1086 | *data = 0; |
| 1087 | break; |
| 1088 | case MSR_IA32_TIME_STAMP_COUNTER: { |
| 1089 | u64 tsc; |
| 1090 | |
| 1091 | rdtscll(tsc); |
| 1092 | *data = vcpu->svm->vmcb->control.tsc_offset + tsc; |
| 1093 | break; |
| 1094 | } |
| 1095 | case MSR_EFER: |
| 1096 | *data = vcpu->shadow_efer; |
| 1097 | break; |
| 1098 | case MSR_IA32_APICBASE: |
| 1099 | *data = vcpu->apic_base; |
| 1100 | break; |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1101 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1102 | case MSR_STAR: |
| 1103 | *data = vcpu->svm->vmcb->save.star; |
| 1104 | break; |
| 1105 | case MSR_LSTAR: |
| 1106 | *data = vcpu->svm->vmcb->save.lstar; |
| 1107 | break; |
| 1108 | case MSR_CSTAR: |
| 1109 | *data = vcpu->svm->vmcb->save.cstar; |
| 1110 | break; |
| 1111 | case MSR_KERNEL_GS_BASE: |
| 1112 | *data = vcpu->svm->vmcb->save.kernel_gs_base; |
| 1113 | break; |
| 1114 | case MSR_SYSCALL_MASK: |
| 1115 | *data = vcpu->svm->vmcb->save.sfmask; |
| 1116 | break; |
| 1117 | #endif |
| 1118 | case MSR_IA32_SYSENTER_CS: |
| 1119 | *data = vcpu->svm->vmcb->save.sysenter_cs; |
| 1120 | break; |
| 1121 | case MSR_IA32_SYSENTER_EIP: |
| 1122 | *data = vcpu->svm->vmcb->save.sysenter_eip; |
| 1123 | break; |
| 1124 | case MSR_IA32_SYSENTER_ESP: |
| 1125 | *data = vcpu->svm->vmcb->save.sysenter_esp; |
| 1126 | break; |
| 1127 | default: |
| 1128 | printk(KERN_ERR "kvm: unhandled rdmsr: 0x%x\n", ecx); |
| 1129 | return 1; |
| 1130 | } |
| 1131 | return 0; |
| 1132 | } |
| 1133 | |
| 1134 | static int rdmsr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1135 | { |
| 1136 | u32 ecx = vcpu->regs[VCPU_REGS_RCX]; |
| 1137 | u64 data; |
| 1138 | |
| 1139 | if (svm_get_msr(vcpu, ecx, &data)) |
| 1140 | svm_inject_gp(vcpu, 0); |
| 1141 | else { |
| 1142 | vcpu->svm->vmcb->save.rax = data & 0xffffffff; |
| 1143 | vcpu->regs[VCPU_REGS_RDX] = data >> 32; |
| 1144 | vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2; |
| 1145 | skip_emulated_instruction(vcpu); |
| 1146 | } |
| 1147 | return 1; |
| 1148 | } |
| 1149 | |
| 1150 | static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data) |
| 1151 | { |
| 1152 | switch (ecx) { |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1153 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1154 | case MSR_EFER: |
| 1155 | set_efer(vcpu, data); |
| 1156 | break; |
| 1157 | #endif |
| 1158 | case MSR_IA32_MC0_STATUS: |
| 1159 | printk(KERN_WARNING "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n" |
| 1160 | , __FUNCTION__, data); |
| 1161 | break; |
| 1162 | case MSR_IA32_TIME_STAMP_COUNTER: { |
| 1163 | u64 tsc; |
| 1164 | |
| 1165 | rdtscll(tsc); |
| 1166 | vcpu->svm->vmcb->control.tsc_offset = data - tsc; |
| 1167 | break; |
| 1168 | } |
| 1169 | case MSR_IA32_UCODE_REV: |
| 1170 | case MSR_IA32_UCODE_WRITE: |
| 1171 | case 0x200 ... 0x2ff: /* MTRRs */ |
| 1172 | break; |
| 1173 | case MSR_IA32_APICBASE: |
| 1174 | vcpu->apic_base = data; |
| 1175 | break; |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1176 | #ifdef CONFIG_X86_64_ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1177 | case MSR_STAR: |
| 1178 | vcpu->svm->vmcb->save.star = data; |
| 1179 | break; |
| 1180 | case MSR_LSTAR: |
| 1181 | vcpu->svm->vmcb->save.lstar = data; |
| 1182 | break; |
| 1183 | case MSR_CSTAR: |
| 1184 | vcpu->svm->vmcb->save.cstar = data; |
| 1185 | break; |
| 1186 | case MSR_KERNEL_GS_BASE: |
| 1187 | vcpu->svm->vmcb->save.kernel_gs_base = data; |
| 1188 | break; |
| 1189 | case MSR_SYSCALL_MASK: |
| 1190 | vcpu->svm->vmcb->save.sfmask = data; |
| 1191 | break; |
| 1192 | #endif |
| 1193 | case MSR_IA32_SYSENTER_CS: |
| 1194 | vcpu->svm->vmcb->save.sysenter_cs = data; |
| 1195 | break; |
| 1196 | case MSR_IA32_SYSENTER_EIP: |
| 1197 | vcpu->svm->vmcb->save.sysenter_eip = data; |
| 1198 | break; |
| 1199 | case MSR_IA32_SYSENTER_ESP: |
| 1200 | vcpu->svm->vmcb->save.sysenter_esp = data; |
| 1201 | break; |
| 1202 | default: |
| 1203 | printk(KERN_ERR "kvm: unhandled wrmsr: %x\n", ecx); |
| 1204 | return 1; |
| 1205 | } |
| 1206 | return 0; |
| 1207 | } |
| 1208 | |
| 1209 | static int wrmsr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1210 | { |
| 1211 | u32 ecx = vcpu->regs[VCPU_REGS_RCX]; |
| 1212 | u64 data = (vcpu->svm->vmcb->save.rax & -1u) |
| 1213 | | ((u64)(vcpu->regs[VCPU_REGS_RDX] & -1u) << 32); |
| 1214 | vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2; |
| 1215 | if (svm_set_msr(vcpu, ecx, data)) |
| 1216 | svm_inject_gp(vcpu, 0); |
| 1217 | else |
| 1218 | skip_emulated_instruction(vcpu); |
| 1219 | return 1; |
| 1220 | } |
| 1221 | |
| 1222 | static int msr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1223 | { |
| 1224 | if (vcpu->svm->vmcb->control.exit_info_1) |
| 1225 | return wrmsr_interception(vcpu, kvm_run); |
| 1226 | else |
| 1227 | return rdmsr_interception(vcpu, kvm_run); |
| 1228 | } |
| 1229 | |
| 1230 | static int (*svm_exit_handlers[])(struct kvm_vcpu *vcpu, |
| 1231 | struct kvm_run *kvm_run) = { |
| 1232 | [SVM_EXIT_READ_CR0] = emulate_on_interception, |
| 1233 | [SVM_EXIT_READ_CR3] = emulate_on_interception, |
| 1234 | [SVM_EXIT_READ_CR4] = emulate_on_interception, |
| 1235 | /* for now: */ |
| 1236 | [SVM_EXIT_WRITE_CR0] = emulate_on_interception, |
| 1237 | [SVM_EXIT_WRITE_CR3] = emulate_on_interception, |
| 1238 | [SVM_EXIT_WRITE_CR4] = emulate_on_interception, |
| 1239 | [SVM_EXIT_READ_DR0] = emulate_on_interception, |
| 1240 | [SVM_EXIT_READ_DR1] = emulate_on_interception, |
| 1241 | [SVM_EXIT_READ_DR2] = emulate_on_interception, |
| 1242 | [SVM_EXIT_READ_DR3] = emulate_on_interception, |
| 1243 | [SVM_EXIT_WRITE_DR0] = emulate_on_interception, |
| 1244 | [SVM_EXIT_WRITE_DR1] = emulate_on_interception, |
| 1245 | [SVM_EXIT_WRITE_DR2] = emulate_on_interception, |
| 1246 | [SVM_EXIT_WRITE_DR3] = emulate_on_interception, |
| 1247 | [SVM_EXIT_WRITE_DR5] = emulate_on_interception, |
| 1248 | [SVM_EXIT_WRITE_DR7] = emulate_on_interception, |
| 1249 | [SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception, |
| 1250 | [SVM_EXIT_INTR] = nop_on_interception, |
| 1251 | [SVM_EXIT_NMI] = nop_on_interception, |
| 1252 | [SVM_EXIT_SMI] = nop_on_interception, |
| 1253 | [SVM_EXIT_INIT] = nop_on_interception, |
| 1254 | /* [SVM_EXIT_CR0_SEL_WRITE] = emulate_on_interception, */ |
| 1255 | [SVM_EXIT_CPUID] = cpuid_interception, |
| 1256 | [SVM_EXIT_HLT] = halt_interception, |
| 1257 | [SVM_EXIT_INVLPG] = emulate_on_interception, |
| 1258 | [SVM_EXIT_INVLPGA] = invalid_op_interception, |
| 1259 | [SVM_EXIT_IOIO] = io_interception, |
| 1260 | [SVM_EXIT_MSR] = msr_interception, |
| 1261 | [SVM_EXIT_TASK_SWITCH] = task_switch_interception, |
| 1262 | [SVM_EXIT_VMRUN] = invalid_op_interception, |
| 1263 | [SVM_EXIT_VMMCALL] = invalid_op_interception, |
| 1264 | [SVM_EXIT_VMLOAD] = invalid_op_interception, |
| 1265 | [SVM_EXIT_VMSAVE] = invalid_op_interception, |
| 1266 | [SVM_EXIT_STGI] = invalid_op_interception, |
| 1267 | [SVM_EXIT_CLGI] = invalid_op_interception, |
| 1268 | [SVM_EXIT_SKINIT] = invalid_op_interception, |
| 1269 | }; |
| 1270 | |
| 1271 | |
| 1272 | static int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1273 | { |
| 1274 | u32 exit_code = vcpu->svm->vmcb->control.exit_code; |
| 1275 | |
| 1276 | kvm_run->exit_type = KVM_EXIT_TYPE_VM_EXIT; |
| 1277 | |
| 1278 | if (is_external_interrupt(vcpu->svm->vmcb->control.exit_int_info) && |
| 1279 | exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR) |
| 1280 | printk(KERN_ERR "%s: unexpected exit_ini_info 0x%x " |
| 1281 | "exit_code 0x%x\n", |
| 1282 | __FUNCTION__, vcpu->svm->vmcb->control.exit_int_info, |
| 1283 | exit_code); |
| 1284 | |
| 1285 | if (exit_code >= sizeof(svm_exit_handlers) / sizeof(*svm_exit_handlers) |
| 1286 | || svm_exit_handlers[exit_code] == 0) { |
| 1287 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; |
| 1288 | printk(KERN_ERR "%s: 0x%x @ 0x%llx cr0 0x%lx rflags 0x%llx\n", |
| 1289 | __FUNCTION__, |
| 1290 | exit_code, |
| 1291 | vcpu->svm->vmcb->save.rip, |
| 1292 | vcpu->cr0, |
| 1293 | vcpu->svm->vmcb->save.rflags); |
| 1294 | return 0; |
| 1295 | } |
| 1296 | |
| 1297 | return svm_exit_handlers[exit_code](vcpu, kvm_run); |
| 1298 | } |
| 1299 | |
| 1300 | static void reload_tss(struct kvm_vcpu *vcpu) |
| 1301 | { |
| 1302 | int cpu = raw_smp_processor_id(); |
| 1303 | |
| 1304 | struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu); |
| 1305 | svm_data->tss_desc->type = 9; //available 32/64-bit TSS |
| 1306 | load_TR_desc(); |
| 1307 | } |
| 1308 | |
| 1309 | static void pre_svm_run(struct kvm_vcpu *vcpu) |
| 1310 | { |
| 1311 | int cpu = raw_smp_processor_id(); |
| 1312 | |
| 1313 | struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu); |
| 1314 | |
| 1315 | vcpu->svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING; |
| 1316 | if (vcpu->cpu != cpu || |
| 1317 | vcpu->svm->asid_generation != svm_data->asid_generation) |
| 1318 | new_asid(vcpu, svm_data); |
| 1319 | } |
| 1320 | |
| 1321 | |
| 1322 | static inline void kvm_try_inject_irq(struct kvm_vcpu *vcpu) |
| 1323 | { |
| 1324 | struct vmcb_control_area *control; |
| 1325 | |
| 1326 | if (!vcpu->irq_summary) |
| 1327 | return; |
| 1328 | |
| 1329 | control = &vcpu->svm->vmcb->control; |
| 1330 | |
| 1331 | control->int_vector = pop_irq(vcpu); |
| 1332 | control->int_ctl &= ~V_INTR_PRIO_MASK; |
| 1333 | control->int_ctl |= V_IRQ_MASK | |
| 1334 | ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT); |
| 1335 | } |
| 1336 | |
| 1337 | static void kvm_reput_irq(struct kvm_vcpu *vcpu) |
| 1338 | { |
| 1339 | struct vmcb_control_area *control = &vcpu->svm->vmcb->control; |
| 1340 | |
| 1341 | if (control->int_ctl & V_IRQ_MASK) { |
| 1342 | control->int_ctl &= ~V_IRQ_MASK; |
| 1343 | push_irq(vcpu, control->int_vector); |
| 1344 | } |
| 1345 | } |
| 1346 | |
| 1347 | static void save_db_regs(unsigned long *db_regs) |
| 1348 | { |
Avi Kivity | 5aff458 | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1349 | asm volatile ("mov %%dr0, %0" : "=r"(db_regs[0])); |
| 1350 | asm volatile ("mov %%dr1, %0" : "=r"(db_regs[1])); |
| 1351 | asm volatile ("mov %%dr2, %0" : "=r"(db_regs[2])); |
| 1352 | asm volatile ("mov %%dr3, %0" : "=r"(db_regs[3])); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1353 | } |
| 1354 | |
| 1355 | static void load_db_regs(unsigned long *db_regs) |
| 1356 | { |
Avi Kivity | 5aff458 | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1357 | asm volatile ("mov %0, %%dr0" : : "r"(db_regs[0])); |
| 1358 | asm volatile ("mov %0, %%dr1" : : "r"(db_regs[1])); |
| 1359 | asm volatile ("mov %0, %%dr2" : : "r"(db_regs[2])); |
| 1360 | asm volatile ("mov %0, %%dr3" : : "r"(db_regs[3])); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1361 | } |
| 1362 | |
| 1363 | static int svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| 1364 | { |
| 1365 | u16 fs_selector; |
| 1366 | u16 gs_selector; |
| 1367 | u16 ldt_selector; |
| 1368 | |
| 1369 | again: |
| 1370 | kvm_try_inject_irq(vcpu); |
| 1371 | |
| 1372 | clgi(); |
| 1373 | |
| 1374 | pre_svm_run(vcpu); |
| 1375 | |
| 1376 | save_host_msrs(vcpu); |
| 1377 | fs_selector = read_fs(); |
| 1378 | gs_selector = read_gs(); |
| 1379 | ldt_selector = read_ldt(); |
| 1380 | vcpu->svm->host_cr2 = kvm_read_cr2(); |
| 1381 | vcpu->svm->host_dr6 = read_dr6(); |
| 1382 | vcpu->svm->host_dr7 = read_dr7(); |
| 1383 | vcpu->svm->vmcb->save.cr2 = vcpu->cr2; |
| 1384 | |
| 1385 | if (vcpu->svm->vmcb->save.dr7 & 0xff) { |
| 1386 | write_dr7(0); |
| 1387 | save_db_regs(vcpu->svm->host_db_regs); |
| 1388 | load_db_regs(vcpu->svm->db_regs); |
| 1389 | } |
| 1390 | asm volatile ( |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1391 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1392 | "push %%rbx; push %%rcx; push %%rdx;" |
| 1393 | "push %%rsi; push %%rdi; push %%rbp;" |
| 1394 | "push %%r8; push %%r9; push %%r10; push %%r11;" |
| 1395 | "push %%r12; push %%r13; push %%r14; push %%r15;" |
| 1396 | #else |
| 1397 | "push %%ebx; push %%ecx; push %%edx;" |
| 1398 | "push %%esi; push %%edi; push %%ebp;" |
| 1399 | #endif |
| 1400 | |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1401 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1402 | "mov %c[rbx](%[vcpu]), %%rbx \n\t" |
| 1403 | "mov %c[rcx](%[vcpu]), %%rcx \n\t" |
| 1404 | "mov %c[rdx](%[vcpu]), %%rdx \n\t" |
| 1405 | "mov %c[rsi](%[vcpu]), %%rsi \n\t" |
| 1406 | "mov %c[rdi](%[vcpu]), %%rdi \n\t" |
| 1407 | "mov %c[rbp](%[vcpu]), %%rbp \n\t" |
| 1408 | "mov %c[r8](%[vcpu]), %%r8 \n\t" |
| 1409 | "mov %c[r9](%[vcpu]), %%r9 \n\t" |
| 1410 | "mov %c[r10](%[vcpu]), %%r10 \n\t" |
| 1411 | "mov %c[r11](%[vcpu]), %%r11 \n\t" |
| 1412 | "mov %c[r12](%[vcpu]), %%r12 \n\t" |
| 1413 | "mov %c[r13](%[vcpu]), %%r13 \n\t" |
| 1414 | "mov %c[r14](%[vcpu]), %%r14 \n\t" |
| 1415 | "mov %c[r15](%[vcpu]), %%r15 \n\t" |
| 1416 | #else |
| 1417 | "mov %c[rbx](%[vcpu]), %%ebx \n\t" |
| 1418 | "mov %c[rcx](%[vcpu]), %%ecx \n\t" |
| 1419 | "mov %c[rdx](%[vcpu]), %%edx \n\t" |
| 1420 | "mov %c[rsi](%[vcpu]), %%esi \n\t" |
| 1421 | "mov %c[rdi](%[vcpu]), %%edi \n\t" |
| 1422 | "mov %c[rbp](%[vcpu]), %%ebp \n\t" |
| 1423 | #endif |
| 1424 | |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1425 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1426 | /* Enter guest mode */ |
| 1427 | "push %%rax \n\t" |
| 1428 | "mov %c[svm](%[vcpu]), %%rax \n\t" |
| 1429 | "mov %c[vmcb](%%rax), %%rax \n\t" |
| 1430 | SVM_VMLOAD "\n\t" |
| 1431 | SVM_VMRUN "\n\t" |
| 1432 | SVM_VMSAVE "\n\t" |
| 1433 | "pop %%rax \n\t" |
| 1434 | #else |
| 1435 | /* Enter guest mode */ |
| 1436 | "push %%eax \n\t" |
| 1437 | "mov %c[svm](%[vcpu]), %%eax \n\t" |
| 1438 | "mov %c[vmcb](%%eax), %%eax \n\t" |
| 1439 | SVM_VMLOAD "\n\t" |
| 1440 | SVM_VMRUN "\n\t" |
| 1441 | SVM_VMSAVE "\n\t" |
| 1442 | "pop %%eax \n\t" |
| 1443 | #endif |
| 1444 | |
| 1445 | /* Save guest registers, load host registers */ |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1446 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1447 | "mov %%rbx, %c[rbx](%[vcpu]) \n\t" |
| 1448 | "mov %%rcx, %c[rcx](%[vcpu]) \n\t" |
| 1449 | "mov %%rdx, %c[rdx](%[vcpu]) \n\t" |
| 1450 | "mov %%rsi, %c[rsi](%[vcpu]) \n\t" |
| 1451 | "mov %%rdi, %c[rdi](%[vcpu]) \n\t" |
| 1452 | "mov %%rbp, %c[rbp](%[vcpu]) \n\t" |
| 1453 | "mov %%r8, %c[r8](%[vcpu]) \n\t" |
| 1454 | "mov %%r9, %c[r9](%[vcpu]) \n\t" |
| 1455 | "mov %%r10, %c[r10](%[vcpu]) \n\t" |
| 1456 | "mov %%r11, %c[r11](%[vcpu]) \n\t" |
| 1457 | "mov %%r12, %c[r12](%[vcpu]) \n\t" |
| 1458 | "mov %%r13, %c[r13](%[vcpu]) \n\t" |
| 1459 | "mov %%r14, %c[r14](%[vcpu]) \n\t" |
| 1460 | "mov %%r15, %c[r15](%[vcpu]) \n\t" |
| 1461 | |
| 1462 | "pop %%r15; pop %%r14; pop %%r13; pop %%r12;" |
| 1463 | "pop %%r11; pop %%r10; pop %%r9; pop %%r8;" |
| 1464 | "pop %%rbp; pop %%rdi; pop %%rsi;" |
| 1465 | "pop %%rdx; pop %%rcx; pop %%rbx; \n\t" |
| 1466 | #else |
| 1467 | "mov %%ebx, %c[rbx](%[vcpu]) \n\t" |
| 1468 | "mov %%ecx, %c[rcx](%[vcpu]) \n\t" |
| 1469 | "mov %%edx, %c[rdx](%[vcpu]) \n\t" |
| 1470 | "mov %%esi, %c[rsi](%[vcpu]) \n\t" |
| 1471 | "mov %%edi, %c[rdi](%[vcpu]) \n\t" |
| 1472 | "mov %%ebp, %c[rbp](%[vcpu]) \n\t" |
| 1473 | |
| 1474 | "pop %%ebp; pop %%edi; pop %%esi;" |
| 1475 | "pop %%edx; pop %%ecx; pop %%ebx; \n\t" |
| 1476 | #endif |
| 1477 | : |
| 1478 | : [vcpu]"a"(vcpu), |
| 1479 | [svm]"i"(offsetof(struct kvm_vcpu, svm)), |
| 1480 | [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)), |
| 1481 | [rbx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBX])), |
| 1482 | [rcx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RCX])), |
| 1483 | [rdx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RDX])), |
| 1484 | [rsi]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RSI])), |
| 1485 | [rdi]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RDI])), |
| 1486 | [rbp]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBP])) |
Avi Kivity | 05b3e0c | 2006-12-13 00:33:45 -0800 | [diff] [blame] | 1487 | #ifdef CONFIG_X86_64 |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1488 | ,[r8 ]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R8 ])), |
| 1489 | [r9 ]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R9 ])), |
| 1490 | [r10]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R10])), |
| 1491 | [r11]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R11])), |
| 1492 | [r12]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R12])), |
| 1493 | [r13]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R13])), |
| 1494 | [r14]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R14])), |
| 1495 | [r15]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R15])) |
| 1496 | #endif |
| 1497 | : "cc", "memory" ); |
| 1498 | |
| 1499 | if ((vcpu->svm->vmcb->save.dr7 & 0xff)) |
| 1500 | load_db_regs(vcpu->svm->host_db_regs); |
| 1501 | |
| 1502 | vcpu->cr2 = vcpu->svm->vmcb->save.cr2; |
| 1503 | |
| 1504 | write_dr6(vcpu->svm->host_dr6); |
| 1505 | write_dr7(vcpu->svm->host_dr7); |
| 1506 | kvm_write_cr2(vcpu->svm->host_cr2); |
| 1507 | |
| 1508 | load_fs(fs_selector); |
| 1509 | load_gs(gs_selector); |
| 1510 | load_ldt(ldt_selector); |
| 1511 | load_host_msrs(vcpu); |
| 1512 | |
| 1513 | reload_tss(vcpu); |
| 1514 | |
| 1515 | stgi(); |
| 1516 | |
| 1517 | kvm_reput_irq(vcpu); |
| 1518 | |
| 1519 | vcpu->svm->next_rip = 0; |
| 1520 | |
| 1521 | if (vcpu->svm->vmcb->control.exit_code == SVM_EXIT_ERR) { |
| 1522 | kvm_run->exit_type = KVM_EXIT_TYPE_FAIL_ENTRY; |
| 1523 | kvm_run->exit_reason = vcpu->svm->vmcb->control.exit_code; |
| 1524 | return 0; |
| 1525 | } |
| 1526 | |
| 1527 | if (handle_exit(vcpu, kvm_run)) { |
| 1528 | if (signal_pending(current)) { |
| 1529 | ++kvm_stat.signal_exits; |
| 1530 | return -EINTR; |
| 1531 | } |
| 1532 | kvm_resched(vcpu); |
| 1533 | goto again; |
| 1534 | } |
| 1535 | return 0; |
| 1536 | } |
| 1537 | |
| 1538 | static void svm_flush_tlb(struct kvm_vcpu *vcpu) |
| 1539 | { |
| 1540 | force_new_asid(vcpu); |
| 1541 | } |
| 1542 | |
| 1543 | static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root) |
| 1544 | { |
| 1545 | vcpu->svm->vmcb->save.cr3 = root; |
| 1546 | force_new_asid(vcpu); |
| 1547 | } |
| 1548 | |
| 1549 | static void svm_inject_page_fault(struct kvm_vcpu *vcpu, |
| 1550 | unsigned long addr, |
| 1551 | uint32_t err_code) |
| 1552 | { |
| 1553 | uint32_t exit_int_info = vcpu->svm->vmcb->control.exit_int_info; |
| 1554 | |
| 1555 | ++kvm_stat.pf_guest; |
| 1556 | |
| 1557 | if (is_page_fault(exit_int_info)) { |
| 1558 | |
| 1559 | vcpu->svm->vmcb->control.event_inj_err = 0; |
| 1560 | vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | |
| 1561 | SVM_EVTINJ_VALID_ERR | |
| 1562 | SVM_EVTINJ_TYPE_EXEPT | |
| 1563 | DF_VECTOR; |
| 1564 | return; |
| 1565 | } |
| 1566 | vcpu->cr2 = addr; |
| 1567 | vcpu->svm->vmcb->save.cr2 = addr; |
| 1568 | vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | |
| 1569 | SVM_EVTINJ_VALID_ERR | |
| 1570 | SVM_EVTINJ_TYPE_EXEPT | |
| 1571 | PF_VECTOR; |
| 1572 | vcpu->svm->vmcb->control.event_inj_err = err_code; |
| 1573 | } |
| 1574 | |
| 1575 | |
| 1576 | static int is_disabled(void) |
| 1577 | { |
| 1578 | return 0; |
| 1579 | } |
| 1580 | |
| 1581 | static struct kvm_arch_ops svm_arch_ops = { |
| 1582 | .cpu_has_kvm_support = has_svm, |
| 1583 | .disabled_by_bios = is_disabled, |
| 1584 | .hardware_setup = svm_hardware_setup, |
| 1585 | .hardware_unsetup = svm_hardware_unsetup, |
| 1586 | .hardware_enable = svm_hardware_enable, |
| 1587 | .hardware_disable = svm_hardware_disable, |
| 1588 | |
| 1589 | .vcpu_create = svm_create_vcpu, |
| 1590 | .vcpu_free = svm_free_vcpu, |
| 1591 | |
| 1592 | .vcpu_load = svm_vcpu_load, |
| 1593 | .vcpu_put = svm_vcpu_put, |
| 1594 | |
| 1595 | .set_guest_debug = svm_guest_debug, |
| 1596 | .get_msr = svm_get_msr, |
| 1597 | .set_msr = svm_set_msr, |
| 1598 | .get_segment_base = svm_get_segment_base, |
| 1599 | .get_segment = svm_get_segment, |
| 1600 | .set_segment = svm_set_segment, |
| 1601 | .is_long_mode = svm_is_long_mode, |
| 1602 | .get_cs_db_l_bits = svm_get_cs_db_l_bits, |
| 1603 | .set_cr0 = svm_set_cr0, |
| 1604 | .set_cr0_no_modeswitch = svm_set_cr0, |
| 1605 | .set_cr3 = svm_set_cr3, |
| 1606 | .set_cr4 = svm_set_cr4, |
| 1607 | .set_efer = svm_set_efer, |
| 1608 | .get_idt = svm_get_idt, |
| 1609 | .set_idt = svm_set_idt, |
| 1610 | .get_gdt = svm_get_gdt, |
| 1611 | .set_gdt = svm_set_gdt, |
| 1612 | .get_dr = svm_get_dr, |
| 1613 | .set_dr = svm_set_dr, |
| 1614 | .cache_regs = svm_cache_regs, |
| 1615 | .decache_regs = svm_decache_regs, |
| 1616 | .get_rflags = svm_get_rflags, |
| 1617 | .set_rflags = svm_set_rflags, |
| 1618 | |
| 1619 | .invlpg = svm_invlpg, |
| 1620 | .tlb_flush = svm_flush_tlb, |
| 1621 | .inject_page_fault = svm_inject_page_fault, |
| 1622 | |
| 1623 | .inject_gp = svm_inject_gp, |
| 1624 | |
| 1625 | .run = svm_vcpu_run, |
| 1626 | .skip_emulated_instruction = skip_emulated_instruction, |
| 1627 | .vcpu_setup = svm_vcpu_setup, |
| 1628 | }; |
| 1629 | |
| 1630 | static int __init svm_init(void) |
| 1631 | { |
Avi Kivity | 873a7c4 | 2006-12-13 00:34:14 -0800 | [diff] [blame^] | 1632 | return kvm_init_arch(&svm_arch_ops, THIS_MODULE); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1633 | } |
| 1634 | |
| 1635 | static void __exit svm_exit(void) |
| 1636 | { |
| 1637 | kvm_exit_arch(); |
| 1638 | } |
| 1639 | |
| 1640 | module_init(svm_init) |
| 1641 | module_exit(svm_exit) |