drivers/kvm/svm.c

   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 <linux/profile.h>
  21 #include <asm/desc.h>
  22
  23 #include "kvm_svm.h"
  24 #include "x86_emulate.h"
  25
  26 MODULE_AUTHOR("Qumranet");
  27 MODULE_LICENSE("GPL");
  28
  29 #define IOPM_ALLOC_ORDER 2
  30 #define MSRPM_ALLOC_ORDER 1
  31
  32 #define DB_VECTOR 1
  33 #define UD_VECTOR 6
  34 #define GP_VECTOR 13
  35
  36 #define DR7_GD_MASK (1 << 13)
  37 #define DR6_BD_MASK (1 << 13)
  38 #define CR4_DE_MASK (1UL << 3)
  39
  40 #define SEG_TYPE_LDT 2
  41 #define SEG_TYPE_BUSY_TSS16 3
  42
  43 #define KVM_EFER_LMA (1 << 10)
  44 #define KVM_EFER_LME (1 << 8)
  45
  46 unsigned long iopm_base;
  47 unsigned long msrpm_base;
  48
  49 struct kvm_ldttss_desc {
  50         u16 limit0;
  51         u16 base0;
  52         unsigned base1 : 8, type : 5, dpl : 2, p : 1;
  53         unsigned limit1 : 4, zero0 : 3, g : 1, base2 : 8;
  54         u32 base3;
  55         u32 zero1;
  56 } __attribute__((packed));
  57
  58 struct svm_cpu_data {
  59         int cpu;
  60
  61         uint64_t asid_generation;
  62         uint32_t max_asid;
  63         uint32_t next_asid;
  64         struct kvm_ldttss_desc *tss_desc;
  65
  66         struct page *save_area;
  67 };
  68
  69 static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);
  70
  71 struct svm_init_data {
  72         int cpu;
  73         int r;
  74 };
  75
  76 static u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
  77
  78 #define NUM_MSR_MAPS (sizeof(msrpm_ranges) / sizeof(*msrpm_ranges))
  79 #define MSRS_RANGE_SIZE 2048
  80 #define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)
  81
  82 #define MAX_INST_SIZE 15
  83
  84 static unsigned get_addr_size(struct kvm_vcpu *vcpu)
  85 {
  86         struct vmcb_save_area *sa = &vcpu->svm->vmcb->save;
  87         u16 cs_attrib;
  88
  89         if (!(sa->cr0 & CR0_PE_MASK) || (sa->rflags & X86_EFLAGS_VM))
  90                 return 2;
  91
  92         cs_attrib = sa->cs.attrib;
  93
  94         return (cs_attrib & SVM_SELECTOR_L_MASK) ? 8 :
  95                                 (cs_attrib & SVM_SELECTOR_DB_MASK) ? 4 : 2;
  96 }
  97
  98 static inline u8 pop_irq(struct kvm_vcpu *vcpu)
  99 {
 100         int word_index = __ffs(vcpu->irq_summary);
 101         int bit_index = __ffs(vcpu->irq_pending[word_index]);
 102         int irq = word_index * BITS_PER_LONG + bit_index;
 103
 104         clear_bit(bit_index, &vcpu->irq_pending[word_index]);
 105         if (!vcpu->irq_pending[word_index])
 106                 clear_bit(word_index, &vcpu->irq_summary);
 107         return irq;
 108 }
 109
 110 static inline void push_irq(struct kvm_vcpu *vcpu, u8 irq)
 111 {
 112         set_bit(irq, vcpu->irq_pending);
 113         set_bit(irq / BITS_PER_LONG, &vcpu->irq_summary);
 114 }
 115
 116 static inline void clgi(void)
 117 {
 118         asm volatile (SVM_CLGI);
 119 }
 120
 121 static inline void stgi(void)
 122 {
 123         asm volatile (SVM_STGI);
 124 }
 125
 126 static inline void invlpga(unsigned long addr, u32 asid)
 127 {
 128         asm volatile (SVM_INVLPGA :: "a"(addr), "c"(asid));
 129 }
 130
 131 static inline unsigned long kvm_read_cr2(void)
 132 {
 133         unsigned long cr2;
 134
 135         asm volatile ("mov %%cr2, %0" : "=r" (cr2));
 136         return cr2;
 137 }
 138
 139 static inline void kvm_write_cr2(unsigned long val)
 140 {
 141         asm volatile ("mov %0, %%cr2" :: "r" (val));
 142 }
 143
 144 static inline unsigned long read_dr6(void)
 145 {
 146         unsigned long dr6;
 147
 148         asm volatile ("mov %%dr6, %0" : "=r" (dr6));
 149         return dr6;
 150 }
 151
 152 static inline void write_dr6(unsigned long val)
 153 {
 154         asm volatile ("mov %0, %%dr6" :: "r" (val));
 155 }
 156
 157 static inline unsigned long read_dr7(void)
 158 {
 159         unsigned long dr7;
 160
 161         asm volatile ("mov %%dr7, %0" : "=r" (dr7));
 162         return dr7;
 163 }
 164
 165 static inline void write_dr7(unsigned long val)
 166 {
 167         asm volatile ("mov %0, %%dr7" :: "r" (val));
 168 }
 169
 170 static inline void force_new_asid(struct kvm_vcpu *vcpu)
 171 {
 172         vcpu->svm->asid_generation--;
 173 }
 174
 175 static inline void flush_guest_tlb(struct kvm_vcpu *vcpu)
 176 {
 177         force_new_asid(vcpu);
 178 }
 179
 180 static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
 181 {
 182         if (!(efer & KVM_EFER_LMA))
 183                 efer &= ~KVM_EFER_LME;
 184
 185         vcpu->svm->vmcb->save.efer = efer | MSR_EFER_SVME_MASK;
 186         vcpu->shadow_efer = efer;
 187 }
 188
 189 static void svm_inject_gp(struct kvm_vcpu *vcpu, unsigned error_code)
 190 {
 191         vcpu->svm->vmcb->control.event_inj =    SVM_EVTINJ_VALID |
 192                                                 SVM_EVTINJ_VALID_ERR |
 193                                                 SVM_EVTINJ_TYPE_EXEPT |
 194                                                 GP_VECTOR;
 195         vcpu->svm->vmcb->control.event_inj_err = error_code;
 196 }
 197
 198 static void inject_ud(struct kvm_vcpu *vcpu)
 199 {
 200         vcpu->svm->vmcb->control.event_inj =    SVM_EVTINJ_VALID |
 201                                                 SVM_EVTINJ_TYPE_EXEPT |
 202                                                 UD_VECTOR;
 203 }
 204
 205 static void inject_db(struct kvm_vcpu *vcpu)
 206 {
 207         vcpu->svm->vmcb->control.event_inj =    SVM_EVTINJ_VALID |
 208                                                 SVM_EVTINJ_TYPE_EXEPT |
 209                                                 DB_VECTOR;
 210 }
 211
 212 static int is_page_fault(uint32_t info)
 213 {
 214         info &= SVM_EVTINJ_VEC_MASK | SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
 215         return info == (PF_VECTOR | SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_EXEPT);
 216 }
 217
 218 static int is_external_interrupt(u32 info)
 219 {
 220         info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
 221         return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR);
 222 }
 223
 224 static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
 225 {
 226         if (!vcpu->svm->next_rip) {
 227                 printk(KERN_DEBUG "%s: NOP\n", __FUNCTION__);
 228                 return;
 229         }
 230         if (vcpu->svm->next_rip - vcpu->svm->vmcb->save.rip > 15) {
 231                 printk(KERN_ERR "%s: ip 0x%llx next 0x%llx\n",
 232                        __FUNCTION__,
 233                        vcpu->svm->vmcb->save.rip,
 234                        vcpu->svm->next_rip);
 235         }
 236
 237         vcpu->rip = vcpu->svm->vmcb->save.rip = vcpu->svm->next_rip;
 238         vcpu->svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK;
 239
 240         vcpu->interrupt_window_open = 1;
 241 }
 242
 243 static int has_svm(void)
 244 {
 245         uint32_t eax, ebx, ecx, edx;
 246
 247         if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD) {
 248                 printk(KERN_INFO "has_svm: not amd\n");
 249                 return 0;
 250         }
 251
 252         cpuid(0x80000000, &eax, &ebx, &ecx, &edx);
 253         if (eax < SVM_CPUID_FUNC) {
 254                 printk(KERN_INFO "has_svm: can't execute cpuid_8000000a\n");
 255                 return 0;
 256         }
 257
 258         cpuid(0x80000001, &eax, &ebx, &ecx, &edx);
 259         if (!(ecx & (1 << SVM_CPUID_FEATURE_SHIFT))) {
 260                 printk(KERN_DEBUG "has_svm: svm not available\n");
 261                 return 0;
 262         }
 263         return 1;
 264 }
 265
 266 static void svm_hardware_disable(void *garbage)
 267 {
 268         struct svm_cpu_data *svm_data
 269                 = per_cpu(svm_data, raw_smp_processor_id());
 270
 271         if (svm_data) {
 272                 uint64_t efer;
 273
 274                 wrmsrl(MSR_VM_HSAVE_PA, 0);
 275                 rdmsrl(MSR_EFER, efer);
 276                 wrmsrl(MSR_EFER, efer & ~MSR_EFER_SVME_MASK);
 277                 per_cpu(svm_data, raw_smp_processor_id()) = NULL;
 278                 __free_page(svm_data->save_area);
 279                 kfree(svm_data);
 280         }
 281 }
 282
 283 static void svm_hardware_enable(void *garbage)
 284 {
 285
 286         struct svm_cpu_data *svm_data;
 287         uint64_t efer;
 288 #ifdef CONFIG_X86_64
 289         struct desc_ptr gdt_descr;
 290 #else
 291         struct Xgt_desc_struct gdt_descr;
 292 #endif
 293         struct desc_struct *gdt;
 294         int me = raw_smp_processor_id();
 295
 296         if (!has_svm()) {
 297                 printk(KERN_ERR "svm_cpu_init: err EOPNOTSUPP on %d\n", me);
 298                 return;
 299         }
 300         svm_data = per_cpu(svm_data, me);
 301
 302         if (!svm_data) {
 303                 printk(KERN_ERR "svm_cpu_init: svm_data is NULL on %d\n",
 304                        me);
 305                 return;
 306         }
 307
 308         svm_data->asid_generation = 1;
 309         svm_data->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
 310         svm_data->next_asid = svm_data->max_asid + 1;
 311
 312         asm volatile ( "sgdt %0" : "=m"(gdt_descr) );
 313         gdt = (struct desc_struct *)gdt_descr.address;
 314         svm_data->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
 315
 316         rdmsrl(MSR_EFER, efer);
 317         wrmsrl(MSR_EFER, efer | MSR_EFER_SVME_MASK);
 318
 319         wrmsrl(MSR_VM_HSAVE_PA,
 320                page_to_pfn(svm_data->save_area) << PAGE_SHIFT);
 321 }
 322
 323 static int svm_cpu_init(int cpu)
 324 {
 325         struct svm_cpu_data *svm_data;
 326         int r;
 327
 328         svm_data = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
 329         if (!svm_data)
 330                 return -ENOMEM;
 331         svm_data->cpu = cpu;
 332         svm_data->save_area = alloc_page(GFP_KERNEL);
 333         r = -ENOMEM;
 334         if (!svm_data->save_area)
 335                 goto err_1;
 336
 337         per_cpu(svm_data, cpu) = svm_data;
 338
 339         return 0;
 340
 341 err_1:
 342         kfree(svm_data);
 343         return r;
 344
 345 }
 346
 347 static int set_msr_interception(u32 *msrpm, unsigned msr,
 348                                 int read, int write)
 349 {
 350         int i;
 351
 352         for (i = 0; i < NUM_MSR_MAPS; i++) {
 353                 if (msr >= msrpm_ranges[i] &&
 354                     msr < msrpm_ranges[i] + MSRS_IN_RANGE) {
 355                         u32 msr_offset = (i * MSRS_IN_RANGE + msr -
 356                                           msrpm_ranges[i]) * 2;
 357
 358                         u32 *base = msrpm + (msr_offset / 32);
 359                         u32 msr_shift = msr_offset % 32;
 360                         u32 mask = ((write) ? 0 : 2) | ((read) ? 0 : 1);
 361                         *base = (*base & ~(0x3 << msr_shift)) |
 362                                 (mask << msr_shift);
 363                         return 1;
 364                 }
 365         }
 366         printk(KERN_DEBUG "%s: not found 0x%x\n", __FUNCTION__, msr);
 367         return 0;
 368 }
 369
 370 static __init int svm_hardware_setup(void)
 371 {
 372         int cpu;
 373         struct page *iopm_pages;
 374         struct page *msrpm_pages;
 375         void *msrpm_va;
 376         int r;
 377
 378         kvm_emulator_want_group7_invlpg();
 379
 380         iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);
 381
 382         if (!iopm_pages)
 383                 return -ENOMEM;
 384         memset(page_address(iopm_pages), 0xff,
 385                                         PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
 386         iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;
 387
 388
 389         msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
 390
 391         r = -ENOMEM;
 392         if (!msrpm_pages)
 393                 goto err_1;
 394
 395         msrpm_va = page_address(msrpm_pages);
 396         memset(msrpm_va, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));
 397         msrpm_base = page_to_pfn(msrpm_pages) << PAGE_SHIFT;
 398
 399 #ifdef CONFIG_X86_64
 400         set_msr_interception(msrpm_va, MSR_GS_BASE, 1, 1);
 401         set_msr_interception(msrpm_va, MSR_FS_BASE, 1, 1);
 402         set_msr_interception(msrpm_va, MSR_KERNEL_GS_BASE, 1, 1);
 403         set_msr_interception(msrpm_va, MSR_LSTAR, 1, 1);
 404         set_msr_interception(msrpm_va, MSR_CSTAR, 1, 1);
 405         set_msr_interception(msrpm_va, MSR_SYSCALL_MASK, 1, 1);
 406 #endif
 407         set_msr_interception(msrpm_va, MSR_K6_STAR, 1, 1);
 408         set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_CS, 1, 1);
 409         set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_ESP, 1, 1);
 410         set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_EIP, 1, 1);
 411
 412         for_each_online_cpu(cpu) {
 413                 r = svm_cpu_init(cpu);
 414                 if (r)
 415                         goto err_2;
 416         }
 417         return 0;
 418
 419 err_2:
 420         __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER);
 421         msrpm_base = 0;
 422 err_1:
 423         __free_pages(iopm_pages, IOPM_ALLOC_ORDER);
 424         iopm_base = 0;
 425         return r;
 426 }
 427
 428 static __exit void svm_hardware_unsetup(void)
 429 {
 430         __free_pages(pfn_to_page(msrpm_base >> PAGE_SHIFT), MSRPM_ALLOC_ORDER);
 431         __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
 432         iopm_base = msrpm_base = 0;
 433 }
 434
 435 static void init_seg(struct vmcb_seg *seg)
 436 {
 437         seg->selector = 0;
 438         seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK |
 439                 SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
 440         seg->limit = 0xffff;
 441         seg->base = 0;
 442 }
 443
 444 static void init_sys_seg(struct vmcb_seg *seg, uint32_t type)
 445 {
 446         seg->selector = 0;
 447         seg->attrib = SVM_SELECTOR_P_MASK | type;
 448         seg->limit = 0xffff;
 449         seg->base = 0;
 450 }
 451
 452 static int svm_vcpu_setup(struct kvm_vcpu *vcpu)
 453 {
 454         return 0;
 455 }
 456
 457 static void init_vmcb(struct vmcb *vmcb)
 458 {
 459         struct vmcb_control_area *control = &vmcb->control;
 460         struct vmcb_save_area *save = &vmcb->save;
 461         u64 tsc;
 462
 463         control->intercept_cr_read =    INTERCEPT_CR0_MASK |
 464                                         INTERCEPT_CR3_MASK |
 465                                         INTERCEPT_CR4_MASK;
 466
 467         control->intercept_cr_write =   INTERCEPT_CR0_MASK |
 468                                         INTERCEPT_CR3_MASK |
 469                                         INTERCEPT_CR4_MASK;
 470
 471         control->intercept_dr_read =    INTERCEPT_DR0_MASK |
 472                                         INTERCEPT_DR1_MASK |
 473                                         INTERCEPT_DR2_MASK |
 474                                         INTERCEPT_DR3_MASK;
 475
 476         control->intercept_dr_write =   INTERCEPT_DR0_MASK |
 477                                         INTERCEPT_DR1_MASK |
 478                                         INTERCEPT_DR2_MASK |
 479                                         INTERCEPT_DR3_MASK |
 480                                         INTERCEPT_DR5_MASK |
 481                                         INTERCEPT_DR7_MASK;
 482
 483         control->intercept_exceptions = 1 << PF_VECTOR;
 484
 485
 486         control->intercept =    (1ULL << INTERCEPT_INTR) |
 487                                 (1ULL << INTERCEPT_NMI) |
 488                 /*
 489                  * selective cr0 intercept bug?
 490                  *      0:   0f 22 d8                mov    %eax,%cr3
 491                  *      3:   0f 20 c0                mov    %cr0,%eax
 492                  *      6:   0d 00 00 00 80          or     $0x80000000,%eax
 493                  *      b:   0f 22 c0                mov    %eax,%cr0
 494                  * set cr3 ->interception
 495                  * get cr0 ->interception
 496                  * set cr0 -> no interception
 497                  */
 498                 /*              (1ULL << INTERCEPT_SELECTIVE_CR0) | */
 499                                 (1ULL << INTERCEPT_CPUID) |
 500                                 (1ULL << INTERCEPT_HLT) |
 501                                 (1ULL << INTERCEPT_INVLPGA) |
 502                                 (1ULL << INTERCEPT_IOIO_PROT) |
 503                                 (1ULL << INTERCEPT_MSR_PROT) |
 504                                 (1ULL << INTERCEPT_TASK_SWITCH) |
 505                                 (1ULL << INTERCEPT_SHUTDOWN) |
 506                                 (1ULL << INTERCEPT_VMRUN) |
 507                                 (1ULL << INTERCEPT_VMMCALL) |
 508                                 (1ULL << INTERCEPT_VMLOAD) |
 509                                 (1ULL << INTERCEPT_VMSAVE) |
 510                                 (1ULL << INTERCEPT_STGI) |
 511                                 (1ULL << INTERCEPT_CLGI) |
 512                                 (1ULL << INTERCEPT_SKINIT);
 513
 514         control->iopm_base_pa = iopm_base;
 515         control->msrpm_base_pa = msrpm_base;
 516         rdtscll(tsc);
 517         control->tsc_offset = -tsc;
 518         control->int_ctl = V_INTR_MASKING_MASK;
 519
 520         init_seg(&save->es);
 521         init_seg(&save->ss);
 522         init_seg(&save->ds);
 523         init_seg(&save->fs);
 524         init_seg(&save->gs);
 525
 526         save->cs.selector = 0xf000;
 527         /* Executable/Readable Code Segment */
 528         save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK |
 529                 SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK;
 530         save->cs.limit = 0xffff;
 531         save->cs.base = 0xffff0000;
 532
 533         save->gdtr.limit = 0xffff;
 534         save->idtr.limit = 0xffff;
 535
 536         init_sys_seg(&save->ldtr, SEG_TYPE_LDT);
 537         init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16);
 538
 539         save->efer = MSR_EFER_SVME_MASK;
 540
 541         save->dr6 = 0xffff0ff0;
 542         save->dr7 = 0x400;
 543         save->rflags = 2;
 544         save->rip = 0x0000fff0;
 545
 546         /*
 547          * cr0 val on cpu init should be 0x60000010, we enable cpu
 548          * cache by default. the orderly way is to enable cache in bios.
 549          */
 550         save->cr0 = 0x00000010 | CR0_PG_MASK;
 551         save->cr4 = CR4_PAE_MASK;
 552         /* rdx = ?? */
 553 }
 554
 555 static int svm_create_vcpu(struct kvm_vcpu *vcpu)
 556 {
 557         struct page *page;
 558         int r;
 559
 560         r = -ENOMEM;
 561         vcpu->svm = kzalloc(sizeof *vcpu->svm, GFP_KERNEL);
 562         if (!vcpu->svm)
 563                 goto out1;
 564         page = alloc_page(GFP_KERNEL);
 565         if (!page)
 566                 goto out2;
 567
 568         vcpu->svm->vmcb = page_address(page);
 569         memset(vcpu->svm->vmcb, 0, PAGE_SIZE);
 570         vcpu->svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT;
 571         vcpu->svm->cr0 = 0x00000010;
 572         vcpu->svm->asid_generation = 0;
 573         memset(vcpu->svm->db_regs, 0, sizeof(vcpu->svm->db_regs));
 574         init_vmcb(vcpu->svm->vmcb);
 575
 576         fx_init(vcpu);
 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 NULL;
 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.idtr.limit;
 685         dt->base = vcpu->svm->vmcb->save.idtr.base;
 686 }
 687
 688 static void svm_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
 689 {
 690         vcpu->svm->vmcb->save.idtr.limit = dt->limit;
 691         vcpu->svm->vmcb->save.idtr.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_decache_cr0_cr4_guest_bits(struct kvm_vcpu *vcpu)
 707 {
 708 }
 709
 710 static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
 711 {
 712 #ifdef CONFIG_X86_64
 713         if (vcpu->shadow_efer & KVM_EFER_LME) {
 714                 if (!is_paging(vcpu) && (cr0 & CR0_PG_MASK)) {
 715                         vcpu->shadow_efer |= KVM_EFER_LMA;
 716                         vcpu->svm->vmcb->save.efer |= KVM_EFER_LMA | KVM_EFER_LME;
 717                 }
 718
 719                 if (is_paging(vcpu) && !(cr0 & CR0_PG_MASK) ) {
 720                         vcpu->shadow_efer &= ~KVM_EFER_LMA;
 721                         vcpu->svm->vmcb->save.efer &= ~(KVM_EFER_LMA | KVM_EFER_LME);
 722                 }
 723         }
 724 #endif
 725         vcpu->svm->cr0 = cr0;
 726         vcpu->svm->vmcb->save.cr0 = cr0 | CR0_PG_MASK;
 727         vcpu->cr0 = cr0;
 728 }
 729
 730 static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
 731 {
 732        vcpu->cr4 = cr4;
 733        vcpu->svm->vmcb->save.cr4 = cr4 | CR4_PAE_MASK;
 734 }
 735
 736 static void svm_set_segment(struct kvm_vcpu *vcpu,
 737                             struct kvm_segment *var, int seg)
 738 {
 739         struct vmcb_seg *s = svm_seg(vcpu, seg);
 740
 741         s->base = var->base;
 742         s->limit = var->limit;
 743         s->selector = var->selector;
 744         if (var->unusable)
 745                 s->attrib = 0;
 746         else {
 747                 s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK);
 748                 s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT;
 749                 s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT;
 750                 s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT;
 751                 s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT;
 752                 s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT;
 753                 s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
 754                 s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
 755         }
 756         if (seg == VCPU_SREG_CS)
 757                 vcpu->svm->vmcb->save.cpl
 758                         = (vcpu->svm->vmcb->save.cs.attrib
 759                            >> SVM_SELECTOR_DPL_SHIFT) & 3;
 760
 761 }
 762
 763 /* FIXME:
 764
 765         vcpu->svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
 766         vcpu->svm->vmcb->control.int_ctl |= (sregs->cr8 & V_TPR_MASK);
 767
 768 */
 769
 770 static int svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg)
 771 {
 772         return -EOPNOTSUPP;
 773 }
 774
 775 static void load_host_msrs(struct kvm_vcpu *vcpu)
 776 {
 777         int i;
 778
 779         for ( i = 0; i < NR_HOST_SAVE_MSRS; i++)
 780                 wrmsrl(host_save_msrs[i], vcpu->svm->host_msrs[i]);
 781 }
 782
 783 static void save_host_msrs(struct kvm_vcpu *vcpu)
 784 {
 785         int i;
 786
 787         for ( i = 0; i < NR_HOST_SAVE_MSRS; i++)
 788                 rdmsrl(host_save_msrs[i], vcpu->svm->host_msrs[i]);
 789 }
 790
 791 static void new_asid(struct kvm_vcpu *vcpu, struct svm_cpu_data *svm_data)
 792 {
 793         if (svm_data->next_asid > svm_data->max_asid) {
 794                 ++svm_data->asid_generation;
 795                 svm_data->next_asid = 1;
 796                 vcpu->svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
 797         }
 798
 799         vcpu->cpu = svm_data->cpu;
 800         vcpu->svm->asid_generation = svm_data->asid_generation;
 801         vcpu->svm->vmcb->control.asid = svm_data->next_asid++;
 802 }
 803
 804 static void svm_invlpg(struct kvm_vcpu *vcpu, gva_t address)
 805 {
 806         invlpga(address, vcpu->svm->vmcb->control.asid); // is needed?
 807 }
 808
 809 static unsigned long svm_get_dr(struct kvm_vcpu *vcpu, int dr)
 810 {
 811         return vcpu->svm->db_regs[dr];
 812 }
 813
 814 static void svm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long value,
 815                        int *exception)
 816 {
 817         *exception = 0;
 818
 819         if (vcpu->svm->vmcb->save.dr7 & DR7_GD_MASK) {
 820                 vcpu->svm->vmcb->save.dr7 &= ~DR7_GD_MASK;
 821                 vcpu->svm->vmcb->save.dr6 |= DR6_BD_MASK;
 822                 *exception = DB_VECTOR;
 823                 return;
 824         }
 825
 826         switch (dr) {
 827         case 0 ... 3:
 828                 vcpu->svm->db_regs[dr] = value;
 829                 return;
 830         case 4 ... 5:
 831                 if (vcpu->cr4 & CR4_DE_MASK) {
 832                         *exception = UD_VECTOR;
 833                         return;
 834                 }
 835         case 7: {
 836                 if (value & ~((1ULL << 32) - 1)) {
 837                         *exception = GP_VECTOR;
 838                         return;
 839                 }
 840                 vcpu->svm->vmcb->save.dr7 = value;
 841                 return;
 842         }
 843         default:
 844                 printk(KERN_DEBUG "%s: unexpected dr %u\n",
 845                        __FUNCTION__, dr);
 846                 *exception = UD_VECTOR;
 847                 return;
 848         }
 849 }
 850
 851 static int pf_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 852 {
 853         u32 exit_int_info = vcpu->svm->vmcb->control.exit_int_info;
 854         u64 fault_address;
 855         u32 error_code;
 856         enum emulation_result er;
 857         int r;
 858
 859         if (is_external_interrupt(exit_int_info))
 860                 push_irq(vcpu, exit_int_info & SVM_EVTINJ_VEC_MASK);
 861
 862         spin_lock(&vcpu->kvm->lock);
 863
 864         fault_address  = vcpu->svm->vmcb->control.exit_info_2;
 865         error_code = vcpu->svm->vmcb->control.exit_info_1;
 866         r = kvm_mmu_page_fault(vcpu, fault_address, error_code);
 867         if (r < 0) {
 868                 spin_unlock(&vcpu->kvm->lock);
 869                 return r;
 870         }
 871         if (!r) {
 872                 spin_unlock(&vcpu->kvm->lock);
 873                 return 1;
 874         }
 875         er = emulate_instruction(vcpu, kvm_run, fault_address, error_code);
 876         spin_unlock(&vcpu->kvm->lock);
 877
 878         switch (er) {
 879         case EMULATE_DONE:
 880                 return 1;
 881         case EMULATE_DO_MMIO:
 882                 ++kvm_stat.mmio_exits;
 883                 kvm_run->exit_reason = KVM_EXIT_MMIO;
 884                 return 0;
 885         case EMULATE_FAIL:
 886                 vcpu_printf(vcpu, "%s: emulate fail\n", __FUNCTION__);
 887                 break;
 888         default:
 889                 BUG();
 890         }
 891
 892         kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 893         return 0;
 894 }
 895
 896 static int shutdown_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 897 {
 898         /*
 899          * VMCB is undefined after a SHUTDOWN intercept
 900          * so reinitialize it.
 901          */
 902         memset(vcpu->svm->vmcb, 0, PAGE_SIZE);
 903         init_vmcb(vcpu->svm->vmcb);
 904
 905         kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
 906         return 0;
 907 }
 908
 909 static int io_get_override(struct kvm_vcpu *vcpu,
 910                           struct vmcb_seg **seg,
 911                           int *addr_override)
 912 {
 913         u8 inst[MAX_INST_SIZE];
 914         unsigned ins_length;
 915         gva_t rip;
 916         int i;
 917
 918         rip =  vcpu->svm->vmcb->save.rip;
 919         ins_length = vcpu->svm->next_rip - rip;
 920         rip += vcpu->svm->vmcb->save.cs.base;
 921
 922         if (ins_length > MAX_INST_SIZE)
 923                 printk(KERN_DEBUG
 924                        "%s: inst length err, cs base 0x%llx rip 0x%llx "
 925                        "next rip 0x%llx ins_length %u\n",
 926                        __FUNCTION__,
 927                        vcpu->svm->vmcb->save.cs.base,
 928                        vcpu->svm->vmcb->save.rip,
 929                        vcpu->svm->vmcb->control.exit_info_2,
 930                        ins_length);
 931
 932         if (kvm_read_guest(vcpu, rip, ins_length, inst) != ins_length)
 933                 /* #PF */
 934                 return 0;
 935
 936         *addr_override = 0;
 937         *seg = NULL;
 938         for (i = 0; i < ins_length; i++)
 939                 switch (inst[i]) {
 940                 case 0xf0:
 941                 case 0xf2:
 942                 case 0xf3:
 943                 case 0x66:
 944                         continue;
 945                 case 0x67:
 946                         *addr_override = 1;
 947                         continue;
 948                 case 0x2e:
 949                         *seg = &vcpu->svm->vmcb->save.cs;
 950                         continue;
 951                 case 0x36:
 952                         *seg = &vcpu->svm->vmcb->save.ss;
 953                         continue;
 954                 case 0x3e:
 955                         *seg = &vcpu->svm->vmcb->save.ds;
 956                         continue;
 957                 case 0x26:
 958                         *seg = &vcpu->svm->vmcb->save.es;
 959                         continue;
 960                 case 0x64:
 961                         *seg = &vcpu->svm->vmcb->save.fs;
 962                         continue;
 963                 case 0x65:
 964                         *seg = &vcpu->svm->vmcb->save.gs;
 965                         continue;
 966                 default:
 967                         return 1;
 968                 }
 969         printk(KERN_DEBUG "%s: unexpected\n", __FUNCTION__);
 970         return 0;
 971 }
 972
 973 static unsigned long io_adress(struct kvm_vcpu *vcpu, int ins, u64 *address)
 974 {
 975         unsigned long addr_mask;
 976         unsigned long *reg;
 977         struct vmcb_seg *seg;
 978         int addr_override;
 979         struct vmcb_save_area *save_area = &vcpu->svm->vmcb->save;
 980         u16 cs_attrib = save_area->cs.attrib;
 981         unsigned addr_size = get_addr_size(vcpu);
 982
 983         if (!io_get_override(vcpu, &seg, &addr_override))
 984                 return 0;
 985
 986         if (addr_override)
 987                 addr_size = (addr_size == 2) ? 4: (addr_size >> 1);
 988
 989         if (ins) {
 990                 reg = &vcpu->regs[VCPU_REGS_RDI];
 991                 seg = &vcpu->svm->vmcb->save.es;
 992         } else {
 993                 reg = &vcpu->regs[VCPU_REGS_RSI];
 994                 seg = (seg) ? seg : &vcpu->svm->vmcb->save.ds;
 995         }
 996
 997         addr_mask = ~0ULL >> (64 - (addr_size * 8));
 998
 999         if ((cs_attrib & SVM_SELECTOR_L_MASK) &&
1000             !(vcpu->svm->vmcb->save.rflags & X86_EFLAGS_VM)) {
1001                 *address = (*reg & addr_mask);
1002                 return addr_mask;
1003         }
1004
1005         if (!(seg->attrib & SVM_SELECTOR_P_SHIFT)) {
1006                 svm_inject_gp(vcpu, 0);
1007                 return 0;
1008         }
1009
1010         *address = (*reg & addr_mask) + seg->base;
1011         return addr_mask;
1012 }
1013
1014 static int io_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1015 {
1016         u32 io_info = vcpu->svm->vmcb->control.exit_info_1; //address size bug?
1017         int _in = io_info & SVM_IOIO_TYPE_MASK;
1018
1019         ++kvm_stat.io_exits;
1020
1021         vcpu->svm->next_rip = vcpu->svm->vmcb->control.exit_info_2;
1022
1023         kvm_run->exit_reason = KVM_EXIT_IO;
1024         kvm_run->io.port = io_info >> 16;
1025         kvm_run->io.direction = (_in) ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
1026         kvm_run->io.size = ((io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT);
1027         kvm_run->io.string = (io_info & SVM_IOIO_STR_MASK) != 0;
1028         kvm_run->io.rep = (io_info & SVM_IOIO_REP_MASK) != 0;
1029
1030         if (kvm_run->io.string) {
1031                 unsigned addr_mask;
1032
1033                 addr_mask = io_adress(vcpu, _in, &kvm_run->io.address);
1034                 if (!addr_mask) {
1035                         printk(KERN_DEBUG "%s: get io address failed\n", __FUNCTION__);
1036                         return 1;
1037                 }
1038
1039                 if (kvm_run->io.rep) {
1040                         kvm_run->io.count = vcpu->regs[VCPU_REGS_RCX] & addr_mask;
1041                         kvm_run->io.string_down = (vcpu->svm->vmcb->save.rflags
1042                                                    & X86_EFLAGS_DF) != 0;
1043                 }
1044         } else {
1045                 kvm_run->io.value = vcpu->svm->vmcb->save.rax;
1046         }
1047         return 0;
1048 }
1049
1050
1051 static int nop_on_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1052 {
1053         return 1;
1054 }
1055
1056 static int halt_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1057 {
1058         vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 1;
1059         skip_emulated_instruction(vcpu);
1060         if (vcpu->irq_summary)
1061                 return 1;
1062
1063         kvm_run->exit_reason = KVM_EXIT_HLT;
1064         ++kvm_stat.halt_exits;
1065         return 0;
1066 }
1067
1068 static int invalid_op_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1069 {
1070         inject_ud(vcpu);
1071         return 1;
1072 }
1073
1074 static int task_switch_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1075 {
1076         printk(KERN_DEBUG "%s: task swiche is unsupported\n", __FUNCTION__);
1077         kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
1078         return 0;
1079 }
1080
1081 static int cpuid_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1082 {
1083         vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2;
1084         kvm_run->exit_reason = KVM_EXIT_CPUID;
1085         return 0;
1086 }
1087
1088 static int emulate_on_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1089 {
1090         if (emulate_instruction(vcpu, NULL, 0, 0) != EMULATE_DONE)
1091                 printk(KERN_ERR "%s: failed\n", __FUNCTION__);
1092         return 1;
1093 }
1094
1095 static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data)
1096 {
1097         switch (ecx) {
1098         case MSR_IA32_TIME_STAMP_COUNTER: {
1099                 u64 tsc;
1100
1101                 rdtscll(tsc);
1102                 *data = vcpu->svm->vmcb->control.tsc_offset + tsc;
1103                 break;
1104         }
1105         case MSR_K6_STAR:
1106                 *data = vcpu->svm->vmcb->save.star;
1107                 break;
1108 #ifdef CONFIG_X86_64
1109         case MSR_LSTAR:
1110                 *data = vcpu->svm->vmcb->save.lstar;
1111                 break;
1112         case MSR_CSTAR:
1113                 *data = vcpu->svm->vmcb->save.cstar;
1114                 break;
1115         case MSR_KERNEL_GS_BASE:
1116                 *data = vcpu->svm->vmcb->save.kernel_gs_base;
1117                 break;
1118         case MSR_SYSCALL_MASK:
1119                 *data = vcpu->svm->vmcb->save.sfmask;
1120                 break;
1121 #endif
1122         case MSR_IA32_SYSENTER_CS:
1123                 *data = vcpu->svm->vmcb->save.sysenter_cs;
1124                 break;
1125         case MSR_IA32_SYSENTER_EIP:
1126                 *data = vcpu->svm->vmcb->save.sysenter_eip;
1127                 break;
1128         case MSR_IA32_SYSENTER_ESP:
1129                 *data = vcpu->svm->vmcb->save.sysenter_esp;
1130                 break;
1131         default:
1132                 return kvm_get_msr_common(vcpu, ecx, data);
1133         }
1134         return 0;
1135 }
1136
1137 static int rdmsr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1138 {
1139         u32 ecx = vcpu->regs[VCPU_REGS_RCX];
1140         u64 data;
1141
1142         if (svm_get_msr(vcpu, ecx, &data))
1143                 svm_inject_gp(vcpu, 0);
1144         else {
1145                 vcpu->svm->vmcb->save.rax = data & 0xffffffff;
1146                 vcpu->regs[VCPU_REGS_RDX] = data >> 32;
1147                 vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2;
1148                 skip_emulated_instruction(vcpu);
1149         }
1150         return 1;
1151 }
1152
1153 static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data)
1154 {
1155         switch (ecx) {
1156         case MSR_IA32_TIME_STAMP_COUNTER: {
1157                 u64 tsc;
1158
1159                 rdtscll(tsc);
1160                 vcpu->svm->vmcb->control.tsc_offset = data - tsc;
1161                 break;
1162         }
1163         case MSR_K6_STAR:
1164                 vcpu->svm->vmcb->save.star = data;
1165                 break;
1166 #ifdef CONFIG_X86_64
1167         case MSR_LSTAR:
1168                 vcpu->svm->vmcb->save.lstar = data;
1169                 break;
1170         case MSR_CSTAR:
1171                 vcpu->svm->vmcb->save.cstar = data;
1172                 break;
1173         case MSR_KERNEL_GS_BASE:
1174                 vcpu->svm->vmcb->save.kernel_gs_base = data;
1175                 break;
1176         case MSR_SYSCALL_MASK:
1177                 vcpu->svm->vmcb->save.sfmask = data;
1178                 break;
1179 #endif
1180         case MSR_IA32_SYSENTER_CS:
1181                 vcpu->svm->vmcb->save.sysenter_cs = data;
1182                 break;
1183         case MSR_IA32_SYSENTER_EIP:
1184                 vcpu->svm->vmcb->save.sysenter_eip = data;
1185                 break;
1186         case MSR_IA32_SYSENTER_ESP:
1187                 vcpu->svm->vmcb->save.sysenter_esp = data;
1188                 break;
1189         default:
1190                 return kvm_set_msr_common(vcpu, ecx, data);
1191         }
1192         return 0;
1193 }
1194
1195 static int wrmsr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1196 {
1197         u32 ecx = vcpu->regs[VCPU_REGS_RCX];
1198         u64 data = (vcpu->svm->vmcb->save.rax & -1u)
1199                 | ((u64)(vcpu->regs[VCPU_REGS_RDX] & -1u) << 32);
1200         vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2;
1201         if (svm_set_msr(vcpu, ecx, data))
1202                 svm_inject_gp(vcpu, 0);
1203         else
1204                 skip_emulated_instruction(vcpu);
1205         return 1;
1206 }
1207
1208 static int msr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1209 {
1210         if (vcpu->svm->vmcb->control.exit_info_1)
1211                 return wrmsr_interception(vcpu, kvm_run);
1212         else
1213                 return rdmsr_interception(vcpu, kvm_run);
1214 }
1215
1216 static int interrupt_window_interception(struct kvm_vcpu *vcpu,
1217                                    struct kvm_run *kvm_run)
1218 {
1219         /*
1220          * If the user space waits to inject interrupts, exit as soon as
1221          * possible
1222          */
1223         if (kvm_run->request_interrupt_window &&
1224             !vcpu->irq_summary) {
1225                 ++kvm_stat.irq_window_exits;
1226                 kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
1227                 return 0;
1228         }
1229
1230         return 1;
1231 }
1232
1233 static int (*svm_exit_handlers[])(struct kvm_vcpu *vcpu,
1234                                       struct kvm_run *kvm_run) = {
1235         [SVM_EXIT_READ_CR0]                     = emulate_on_interception,
1236         [SVM_EXIT_READ_CR3]                     = emulate_on_interception,
1237         [SVM_EXIT_READ_CR4]                     = emulate_on_interception,
1238         /* for now: */
1239         [SVM_EXIT_WRITE_CR0]                    = emulate_on_interception,
1240         [SVM_EXIT_WRITE_CR3]                    = emulate_on_interception,
1241         [SVM_EXIT_WRITE_CR4]                    = emulate_on_interception,
1242         [SVM_EXIT_READ_DR0]                     = emulate_on_interception,
1243         [SVM_EXIT_READ_DR1]                     = emulate_on_interception,
1244         [SVM_EXIT_READ_DR2]                     = emulate_on_interception,
1245         [SVM_EXIT_READ_DR3]                     = emulate_on_interception,
1246         [SVM_EXIT_WRITE_DR0]                    = emulate_on_interception,
1247         [SVM_EXIT_WRITE_DR1]                    = emulate_on_interception,
1248         [SVM_EXIT_WRITE_DR2]                    = emulate_on_interception,
1249         [SVM_EXIT_WRITE_DR3]                    = emulate_on_interception,
1250         [SVM_EXIT_WRITE_DR5]                    = emulate_on_interception,
1251         [SVM_EXIT_WRITE_DR7]                    = emulate_on_interception,
1252         [SVM_EXIT_EXCP_BASE + PF_VECTOR]        = pf_interception,
1253         [SVM_EXIT_INTR]                         = nop_on_interception,
1254         [SVM_EXIT_NMI]                          = nop_on_interception,
1255         [SVM_EXIT_SMI]                          = nop_on_interception,
1256         [SVM_EXIT_INIT]                         = nop_on_interception,
1257         [SVM_EXIT_VINTR]                        = interrupt_window_interception,
1258         /* [SVM_EXIT_CR0_SEL_WRITE]             = emulate_on_interception, */
1259         [SVM_EXIT_CPUID]                        = cpuid_interception,
1260         [SVM_EXIT_HLT]                          = halt_interception,
1261         [SVM_EXIT_INVLPG]                       = emulate_on_interception,
1262         [SVM_EXIT_INVLPGA]                      = invalid_op_interception,
1263         [SVM_EXIT_IOIO]                         = io_interception,
1264         [SVM_EXIT_MSR]                          = msr_interception,
1265         [SVM_EXIT_TASK_SWITCH]                  = task_switch_interception,
1266         [SVM_EXIT_SHUTDOWN]                     = shutdown_interception,
1267         [SVM_EXIT_VMRUN]                        = invalid_op_interception,
1268         [SVM_EXIT_VMMCALL]                      = invalid_op_interception,
1269         [SVM_EXIT_VMLOAD]                       = invalid_op_interception,
1270         [SVM_EXIT_VMSAVE]                       = invalid_op_interception,
1271         [SVM_EXIT_STGI]                         = invalid_op_interception,
1272         [SVM_EXIT_CLGI]                         = invalid_op_interception,
1273         [SVM_EXIT_SKINIT]                       = invalid_op_interception,
1274 };
1275
1276
1277 static int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1278 {
1279         u32 exit_code = vcpu->svm->vmcb->control.exit_code;
1280
1281         kvm_run->exit_type = KVM_EXIT_TYPE_VM_EXIT;
1282
1283         if (is_external_interrupt(vcpu->svm->vmcb->control.exit_int_info) &&
1284             exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR)
1285                 printk(KERN_ERR "%s: unexpected exit_ini_info 0x%x "
1286                        "exit_code 0x%x\n",
1287                        __FUNCTION__, vcpu->svm->vmcb->control.exit_int_info,
1288                        exit_code);
1289
1290         if (exit_code >= sizeof(svm_exit_handlers) / sizeof(*svm_exit_handlers)
1291             || svm_exit_handlers[exit_code] == 0) {
1292                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
1293                 printk(KERN_ERR "%s: 0x%x @ 0x%llx cr0 0x%lx rflags 0x%llx\n",
1294                        __FUNCTION__,
1295                        exit_code,
1296                        vcpu->svm->vmcb->save.rip,
1297                        vcpu->cr0,
1298                        vcpu->svm->vmcb->save.rflags);
1299                 return 0;
1300         }
1301
1302         return svm_exit_handlers[exit_code](vcpu, kvm_run);
1303 }
1304
1305 static void reload_tss(struct kvm_vcpu *vcpu)
1306 {
1307         int cpu = raw_smp_processor_id();
1308
1309         struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
1310         svm_data->tss_desc->type = 9; //available 32/64-bit TSS
1311         load_TR_desc();
1312 }
1313
1314 static void pre_svm_run(struct kvm_vcpu *vcpu)
1315 {
1316         int cpu = raw_smp_processor_id();
1317
1318         struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
1319
1320         vcpu->svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
1321         if (vcpu->cpu != cpu ||
1322             vcpu->svm->asid_generation != svm_data->asid_generation)
1323                 new_asid(vcpu, svm_data);
1324 }
1325
1326
1327 static inline void kvm_do_inject_irq(struct kvm_vcpu *vcpu)
1328 {
1329         struct vmcb_control_area *control;
1330
1331         control = &vcpu->svm->vmcb->control;
1332         control->int_vector = pop_irq(vcpu);
1333         control->int_ctl &= ~V_INTR_PRIO_MASK;
1334         control->int_ctl |= V_IRQ_MASK |
1335                 ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
1336 }
1337
1338 static void kvm_reput_irq(struct kvm_vcpu *vcpu)
1339 {
1340         struct vmcb_control_area *control = &vcpu->svm->vmcb->control;
1341
1342         if (control->int_ctl & V_IRQ_MASK) {
1343                 control->int_ctl &= ~V_IRQ_MASK;
1344                 push_irq(vcpu, control->int_vector);
1345         }
1346
1347         vcpu->interrupt_window_open =
1348                 !(control->int_state & SVM_INTERRUPT_SHADOW_MASK);
1349 }
1350
1351 static void do_interrupt_requests(struct kvm_vcpu *vcpu,
1352                                        struct kvm_run *kvm_run)
1353 {
1354         struct vmcb_control_area *control = &vcpu->svm->vmcb->control;
1355
1356         vcpu->interrupt_window_open =
1357                 (!(control->int_state & SVM_INTERRUPT_SHADOW_MASK) &&
1358                  (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF));
1359
1360         if (vcpu->interrupt_window_open && vcpu->irq_summary)
1361                 /*
1362                  * If interrupts enabled, and not blocked by sti or mov ss. Good.
1363                  */
1364                 kvm_do_inject_irq(vcpu);
1365
1366         /*
1367          * Interrupts blocked.  Wait for unblock.
1368          */
1369         if (!vcpu->interrupt_window_open &&
1370             (vcpu->irq_summary || kvm_run->request_interrupt_window)) {
1371                 control->intercept |= 1ULL << INTERCEPT_VINTR;
1372         } else
1373                 control->intercept &= ~(1ULL << INTERCEPT_VINTR);
1374 }
1375
1376 static void post_kvm_run_save(struct kvm_vcpu *vcpu,
1377                               struct kvm_run *kvm_run)
1378 {
1379         kvm_run->ready_for_interrupt_injection = (vcpu->interrupt_window_open &&
1380                                                   vcpu->irq_summary == 0);
1381         kvm_run->if_flag = (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF) != 0;
1382         kvm_run->cr8 = vcpu->cr8;
1383         kvm_run->apic_base = vcpu->apic_base;
1384 }
1385
1386 /*
1387  * Check if userspace requested an interrupt window, and that the
1388  * interrupt window is open.
1389  *
1390  * No need to exit to userspace if we already have an interrupt queued.
1391  */
1392 static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
1393                                           struct kvm_run *kvm_run)
1394 {
1395         return (!vcpu->irq_summary &&
1396                 kvm_run->request_interrupt_window &&
1397                 vcpu->interrupt_window_open &&
1398                 (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF));
1399 }
1400
1401 static void save_db_regs(unsigned long *db_regs)
1402 {
1403         asm volatile ("mov %%dr0, %0" : "=r"(db_regs[0]));
1404         asm volatile ("mov %%dr1, %0" : "=r"(db_regs[1]));
1405         asm volatile ("mov %%dr2, %0" : "=r"(db_regs[2]));
1406         asm volatile ("mov %%dr3, %0" : "=r"(db_regs[3]));
1407 }
1408
1409 static void load_db_regs(unsigned long *db_regs)
1410 {
1411         asm volatile ("mov %0, %%dr0" : : "r"(db_regs[0]));
1412         asm volatile ("mov %0, %%dr1" : : "r"(db_regs[1]));
1413         asm volatile ("mov %0, %%dr2" : : "r"(db_regs[2]));
1414         asm volatile ("mov %0, %%dr3" : : "r"(db_regs[3]));
1415 }
1416
1417 static int svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1418 {
1419         u16 fs_selector;
1420         u16 gs_selector;
1421         u16 ldt_selector;
1422         int r;
1423
1424 again:
1425         if (!vcpu->mmio_read_completed)
1426                 do_interrupt_requests(vcpu, kvm_run);
1427
1428         clgi();
1429
1430         pre_svm_run(vcpu);
1431
1432         save_host_msrs(vcpu);
1433         fs_selector = read_fs();
1434         gs_selector = read_gs();
1435         ldt_selector = read_ldt();
1436         vcpu->svm->host_cr2 = kvm_read_cr2();
1437         vcpu->svm->host_dr6 = read_dr6();
1438         vcpu->svm->host_dr7 = read_dr7();
1439         vcpu->svm->vmcb->save.cr2 = vcpu->cr2;
1440
1441         if (vcpu->svm->vmcb->save.dr7 & 0xff) {
1442                 write_dr7(0);
1443                 save_db_regs(vcpu->svm->host_db_regs);
1444                 load_db_regs(vcpu->svm->db_regs);
1445         }
1446
1447         fx_save(vcpu->host_fx_image);
1448         fx_restore(vcpu->guest_fx_image);
1449
1450         asm volatile (
1451 #ifdef CONFIG_X86_64
1452                 "push %%rbx; push %%rcx; push %%rdx;"
1453                 "push %%rsi; push %%rdi; push %%rbp;"
1454                 "push %%r8;  push %%r9;  push %%r10; push %%r11;"
1455                 "push %%r12; push %%r13; push %%r14; push %%r15;"
1456 #else
1457                 "push %%ebx; push %%ecx; push %%edx;"
1458                 "push %%esi; push %%edi; push %%ebp;"
1459 #endif
1460
1461 #ifdef CONFIG_X86_64
1462                 "mov %c[rbx](%[vcpu]), %%rbx \n\t"
1463                 "mov %c[rcx](%[vcpu]), %%rcx \n\t"
1464                 "mov %c[rdx](%[vcpu]), %%rdx \n\t"
1465                 "mov %c[rsi](%[vcpu]), %%rsi \n\t"
1466                 "mov %c[rdi](%[vcpu]), %%rdi \n\t"
1467                 "mov %c[rbp](%[vcpu]), %%rbp \n\t"
1468                 "mov %c[r8](%[vcpu]),  %%r8  \n\t"
1469                 "mov %c[r9](%[vcpu]),  %%r9  \n\t"
1470                 "mov %c[r10](%[vcpu]), %%r10 \n\t"
1471                 "mov %c[r11](%[vcpu]), %%r11 \n\t"
1472                 "mov %c[r12](%[vcpu]), %%r12 \n\t"
1473                 "mov %c[r13](%[vcpu]), %%r13 \n\t"
1474                 "mov %c[r14](%[vcpu]), %%r14 \n\t"
1475                 "mov %c[r15](%[vcpu]), %%r15 \n\t"
1476 #else
1477                 "mov %c[rbx](%[vcpu]), %%ebx \n\t"
1478                 "mov %c[rcx](%[vcpu]), %%ecx \n\t"
1479                 "mov %c[rdx](%[vcpu]), %%edx \n\t"
1480                 "mov %c[rsi](%[vcpu]), %%esi \n\t"
1481                 "mov %c[rdi](%[vcpu]), %%edi \n\t"
1482                 "mov %c[rbp](%[vcpu]), %%ebp \n\t"
1483 #endif
1484
1485 #ifdef CONFIG_X86_64
1486                 /* Enter guest mode */
1487                 "push %%rax \n\t"
1488                 "mov %c[svm](%[vcpu]), %%rax \n\t"
1489                 "mov %c[vmcb](%%rax), %%rax \n\t"
1490                 SVM_VMLOAD "\n\t"
1491                 SVM_VMRUN "\n\t"
1492                 SVM_VMSAVE "\n\t"
1493                 "pop %%rax \n\t"
1494 #else
1495                 /* Enter guest mode */
1496                 "push %%eax \n\t"
1497                 "mov %c[svm](%[vcpu]), %%eax \n\t"
1498                 "mov %c[vmcb](%%eax), %%eax \n\t"
1499                 SVM_VMLOAD "\n\t"
1500                 SVM_VMRUN "\n\t"
1501                 SVM_VMSAVE "\n\t"
1502                 "pop %%eax \n\t"
1503 #endif
1504
1505                 /* Save guest registers, load host registers */
1506 #ifdef CONFIG_X86_64
1507                 "mov %%rbx, %c[rbx](%[vcpu]) \n\t"
1508                 "mov %%rcx, %c[rcx](%[vcpu]) \n\t"
1509                 "mov %%rdx, %c[rdx](%[vcpu]) \n\t"
1510                 "mov %%rsi, %c[rsi](%[vcpu]) \n\t"
1511                 "mov %%rdi, %c[rdi](%[vcpu]) \n\t"
1512                 "mov %%rbp, %c[rbp](%[vcpu]) \n\t"
1513                 "mov %%r8,  %c[r8](%[vcpu]) \n\t"
1514                 "mov %%r9,  %c[r9](%[vcpu]) \n\t"
1515                 "mov %%r10, %c[r10](%[vcpu]) \n\t"
1516                 "mov %%r11, %c[r11](%[vcpu]) \n\t"
1517                 "mov %%r12, %c[r12](%[vcpu]) \n\t"
1518                 "mov %%r13, %c[r13](%[vcpu]) \n\t"
1519                 "mov %%r14, %c[r14](%[vcpu]) \n\t"
1520                 "mov %%r15, %c[r15](%[vcpu]) \n\t"
1521
1522                 "pop  %%r15; pop  %%r14; pop  %%r13; pop  %%r12;"
1523                 "pop  %%r11; pop  %%r10; pop  %%r9;  pop  %%r8;"
1524                 "pop  %%rbp; pop  %%rdi; pop  %%rsi;"
1525                 "pop  %%rdx; pop  %%rcx; pop  %%rbx; \n\t"
1526 #else
1527                 "mov %%ebx, %c[rbx](%[vcpu]) \n\t"
1528                 "mov %%ecx, %c[rcx](%[vcpu]) \n\t"
1529                 "mov %%edx, %c[rdx](%[vcpu]) \n\t"
1530                 "mov %%esi, %c[rsi](%[vcpu]) \n\t"
1531                 "mov %%edi, %c[rdi](%[vcpu]) \n\t"
1532                 "mov %%ebp, %c[rbp](%[vcpu]) \n\t"
1533
1534                 "pop  %%ebp; pop  %%edi; pop  %%esi;"
1535                 "pop  %%edx; pop  %%ecx; pop  %%ebx; \n\t"
1536 #endif
1537                 :
1538                 : [vcpu]"a"(vcpu),
1539                   [svm]"i"(offsetof(struct kvm_vcpu, svm)),
1540                   [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
1541                   [rbx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBX])),
1542                   [rcx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RCX])),
1543                   [rdx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RDX])),
1544                   [rsi]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RSI])),
1545                   [rdi]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RDI])),
1546                   [rbp]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBP]))
1547 #ifdef CONFIG_X86_64
1548                   ,[r8 ]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R8 ])),
1549                   [r9 ]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R9 ])),
1550                   [r10]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R10])),
1551                   [r11]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R11])),
1552                   [r12]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R12])),
1553                   [r13]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R13])),
1554                   [r14]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R14])),
1555                   [r15]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R15]))
1556 #endif
1557                 : "cc", "memory" );
1558
1559         fx_save(vcpu->guest_fx_image);
1560         fx_restore(vcpu->host_fx_image);
1561
1562         if ((vcpu->svm->vmcb->save.dr7 & 0xff))
1563                 load_db_regs(vcpu->svm->host_db_regs);
1564
1565         vcpu->cr2 = vcpu->svm->vmcb->save.cr2;
1566
1567         write_dr6(vcpu->svm->host_dr6);
1568         write_dr7(vcpu->svm->host_dr7);
1569         kvm_write_cr2(vcpu->svm->host_cr2);
1570
1571         load_fs(fs_selector);
1572         load_gs(gs_selector);
1573         load_ldt(ldt_selector);
1574         load_host_msrs(vcpu);
1575
1576         reload_tss(vcpu);
1577
1578         /*
1579          * Profile KVM exit RIPs:
1580          */
1581         if (unlikely(prof_on == KVM_PROFILING))
1582                 profile_hit(KVM_PROFILING,
1583                         (void *)(unsigned long)vcpu->svm->vmcb->save.rip);
1584
1585         stgi();
1586
1587         kvm_reput_irq(vcpu);
1588
1589         vcpu->svm->next_rip = 0;
1590
1591         if (vcpu->svm->vmcb->control.exit_code == SVM_EXIT_ERR) {
1592                 kvm_run->exit_type = KVM_EXIT_TYPE_FAIL_ENTRY;
1593                 kvm_run->exit_reason = vcpu->svm->vmcb->control.exit_code;
1594                 post_kvm_run_save(vcpu, kvm_run);
1595                 return 0;
1596         }
1597
1598         r = handle_exit(vcpu, kvm_run);
1599         if (r > 0) {
1600                 if (signal_pending(current)) {
1601                         ++kvm_stat.signal_exits;
1602                         post_kvm_run_save(vcpu, kvm_run);
1603                         return -EINTR;
1604                 }
1605
1606                 if (dm_request_for_irq_injection(vcpu, kvm_run)) {
1607                         ++kvm_stat.request_irq_exits;
1608                         post_kvm_run_save(vcpu, kvm_run);
1609                         return -EINTR;
1610                 }
1611                 kvm_resched(vcpu);
1612                 goto again;
1613         }
1614         post_kvm_run_save(vcpu, kvm_run);
1615         return r;
1616 }
1617
1618 static void svm_flush_tlb(struct kvm_vcpu *vcpu)
1619 {
1620         force_new_asid(vcpu);
1621 }
1622
1623 static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
1624 {
1625         vcpu->svm->vmcb->save.cr3 = root;
1626         force_new_asid(vcpu);
1627 }
1628
1629 static void svm_inject_page_fault(struct kvm_vcpu *vcpu,
1630                                   unsigned long  addr,
1631                                   uint32_t err_code)
1632 {
1633         uint32_t exit_int_info = vcpu->svm->vmcb->control.exit_int_info;
1634
1635         ++kvm_stat.pf_guest;
1636
1637         if (is_page_fault(exit_int_info)) {
1638
1639                 vcpu->svm->vmcb->control.event_inj_err = 0;
1640                 vcpu->svm->vmcb->control.event_inj =    SVM_EVTINJ_VALID |
1641                                                         SVM_EVTINJ_VALID_ERR |
1642                                                         SVM_EVTINJ_TYPE_EXEPT |
1643                                                         DF_VECTOR;
1644                 return;
1645         }
1646         vcpu->cr2 = addr;
1647         vcpu->svm->vmcb->save.cr2 = addr;
1648         vcpu->svm->vmcb->control.event_inj =    SVM_EVTINJ_VALID |
1649                                                 SVM_EVTINJ_VALID_ERR |
1650                                                 SVM_EVTINJ_TYPE_EXEPT |
1651                                                 PF_VECTOR;
1652         vcpu->svm->vmcb->control.event_inj_err = err_code;
1653 }
1654
1655
1656 static int is_disabled(void)
1657 {
1658         return 0;
1659 }
1660
1661 static struct kvm_arch_ops svm_arch_ops = {
1662         .cpu_has_kvm_support = has_svm,
1663         .disabled_by_bios = is_disabled,
1664         .hardware_setup = svm_hardware_setup,
1665         .hardware_unsetup = svm_hardware_unsetup,
1666         .hardware_enable = svm_hardware_enable,
1667         .hardware_disable = svm_hardware_disable,
1668
1669         .vcpu_create = svm_create_vcpu,
1670         .vcpu_free = svm_free_vcpu,
1671
1672         .vcpu_load = svm_vcpu_load,
1673         .vcpu_put = svm_vcpu_put,
1674
1675         .set_guest_debug = svm_guest_debug,
1676         .get_msr = svm_get_msr,
1677         .set_msr = svm_set_msr,
1678         .get_segment_base = svm_get_segment_base,
1679         .get_segment = svm_get_segment,
1680         .set_segment = svm_set_segment,
1681         .get_cs_db_l_bits = svm_get_cs_db_l_bits,
1682         .decache_cr0_cr4_guest_bits = svm_decache_cr0_cr4_guest_bits,
1683         .set_cr0 = svm_set_cr0,
1684         .set_cr0_no_modeswitch = svm_set_cr0,
1685         .set_cr3 = svm_set_cr3,
1686         .set_cr4 = svm_set_cr4,
1687         .set_efer = svm_set_efer,
1688         .get_idt = svm_get_idt,
1689         .set_idt = svm_set_idt,
1690         .get_gdt = svm_get_gdt,
1691         .set_gdt = svm_set_gdt,
1692         .get_dr = svm_get_dr,
1693         .set_dr = svm_set_dr,
1694         .cache_regs = svm_cache_regs,
1695         .decache_regs = svm_decache_regs,
1696         .get_rflags = svm_get_rflags,
1697         .set_rflags = svm_set_rflags,
1698
1699         .invlpg = svm_invlpg,
1700         .tlb_flush = svm_flush_tlb,
1701         .inject_page_fault = svm_inject_page_fault,
1702
1703         .inject_gp = svm_inject_gp,
1704
1705         .run = svm_vcpu_run,
1706         .skip_emulated_instruction = skip_emulated_instruction,
1707         .vcpu_setup = svm_vcpu_setup,
1708 };
1709
1710 static int __init svm_init(void)
1711 {
1712         return kvm_init_arch(&svm_arch_ops, THIS_MODULE);
1713 }
1714
1715 static void __exit svm_exit(void)
1716 {
1717         kvm_exit_arch();
1718 }
1719
1720 module_init(svm_init)
1721 module_exit(svm_exit)