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 "kvm_svm.h"
  18 #include "x86_emulate.h"
  19
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/vmalloc.h>
  23 #include <linux/highmem.h>
  24 #include <linux/profile.h>
  25 #include <linux/sched.h>
  26
  27 #include <asm/desc.h>
  28
  29 MODULE_AUTHOR("Qumranet");
  30 MODULE_LICENSE("GPL");
  31
  32 #define IOPM_ALLOC_ORDER 2
  33 #define MSRPM_ALLOC_ORDER 1
  34
  35 #define DB_VECTOR 1
  36 #define UD_VECTOR 6
  37 #define GP_VECTOR 13
  38
  39 #define DR7_GD_MASK (1 << 13)
  40 #define DR6_BD_MASK (1 << 13)
  41 #define CR4_DE_MASK (1UL << 3)
  42
  43 #define SEG_TYPE_LDT 2
  44 #define SEG_TYPE_BUSY_TSS16 3
  45
  46 #define KVM_EFER_LMA (1 << 10)
  47 #define KVM_EFER_LME (1 << 8)
  48
  49 #define SVM_FEATURE_NPT  (1 << 0)
  50 #define SVM_FEATURE_LBRV (1 << 1)
  51 #define SVM_DEATURE_SVML (1 << 2)
  52
  53 unsigned long iopm_base;
  54 unsigned long msrpm_base;
  55
  56 struct kvm_ldttss_desc {
  57         u16 limit0;
  58         u16 base0;
  59         unsigned base1 : 8, type : 5, dpl : 2, p : 1;
  60         unsigned limit1 : 4, zero0 : 3, g : 1, base2 : 8;
  61         u32 base3;
  62         u32 zero1;
  63 } __attribute__((packed));
  64
  65 struct svm_cpu_data {
  66         int cpu;
  67
  68         u64 asid_generation;
  69         u32 max_asid;
  70         u32 next_asid;
  71         struct kvm_ldttss_desc *tss_desc;
  72
  73         struct page *save_area;
  74 };
  75
  76 static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);
  77 static uint32_t svm_features;
  78
  79 struct svm_init_data {
  80         int cpu;
  81         int r;
  82 };
  83
  84 static u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
  85
  86 #define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges)
  87 #define MSRS_RANGE_SIZE 2048
  88 #define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)
  89
  90 #define MAX_INST_SIZE 15
  91
  92 static inline u32 svm_has(u32 feat)
  93 {
  94         return svm_features & feat;
  95 }
  96
  97 static unsigned get_addr_size(struct kvm_vcpu *vcpu)
  98 {
  99         struct vmcb_save_area *sa = &vcpu->svm->vmcb->save;
 100         u16 cs_attrib;
 101
 102         if (!(sa->cr0 & X86_CR0_PE) || (sa->rflags & X86_EFLAGS_VM))
 103                 return 2;
 104
 105         cs_attrib = sa->cs.attrib;
 106
 107         return (cs_attrib & SVM_SELECTOR_L_MASK) ? 8 :
 108                                 (cs_attrib & SVM_SELECTOR_DB_MASK) ? 4 : 2;
 109 }
 110
 111 static inline u8 pop_irq(struct kvm_vcpu *vcpu)
 112 {
 113         int word_index = __ffs(vcpu->irq_summary);
 114         int bit_index = __ffs(vcpu->irq_pending[word_index]);
 115         int irq = word_index * BITS_PER_LONG + bit_index;
 116
 117         clear_bit(bit_index, &vcpu->irq_pending[word_index]);
 118         if (!vcpu->irq_pending[word_index])
 119                 clear_bit(word_index, &vcpu->irq_summary);
 120         return irq;
 121 }
 122
 123 static inline void push_irq(struct kvm_vcpu *vcpu, u8 irq)
 124 {
 125         set_bit(irq, vcpu->irq_pending);
 126         set_bit(irq / BITS_PER_LONG, &vcpu->irq_summary);
 127 }
 128
 129 static inline void clgi(void)
 130 {
 131         asm volatile (SVM_CLGI);
 132 }
 133
 134 static inline void stgi(void)
 135 {
 136         asm volatile (SVM_STGI);
 137 }
 138
 139 static inline void invlpga(unsigned long addr, u32 asid)
 140 {
 141         asm volatile (SVM_INVLPGA :: "a"(addr), "c"(asid));
 142 }
 143
 144 static inline unsigned long kvm_read_cr2(void)
 145 {
 146         unsigned long cr2;
 147
 148         asm volatile ("mov %%cr2, %0" : "=r" (cr2));
 149         return cr2;
 150 }
 151
 152 static inline void kvm_write_cr2(unsigned long val)
 153 {
 154         asm volatile ("mov %0, %%cr2" :: "r" (val));
 155 }
 156
 157 static inline unsigned long read_dr6(void)
 158 {
 159         unsigned long dr6;
 160
 161         asm volatile ("mov %%dr6, %0" : "=r" (dr6));
 162         return dr6;
 163 }
 164
 165 static inline void write_dr6(unsigned long val)
 166 {
 167         asm volatile ("mov %0, %%dr6" :: "r" (val));
 168 }
 169
 170 static inline unsigned long read_dr7(void)
 171 {
 172         unsigned long dr7;
 173
 174         asm volatile ("mov %%dr7, %0" : "=r" (dr7));
 175         return dr7;
 176 }
 177
 178 static inline void write_dr7(unsigned long val)
 179 {
 180         asm volatile ("mov %0, %%dr7" :: "r" (val));
 181 }
 182
 183 static inline void force_new_asid(struct kvm_vcpu *vcpu)
 184 {
 185         vcpu->svm->asid_generation--;
 186 }
 187
 188 static inline void flush_guest_tlb(struct kvm_vcpu *vcpu)
 189 {
 190         force_new_asid(vcpu);
 191 }
 192
 193 static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
 194 {
 195         if (!(efer & KVM_EFER_LMA))
 196                 efer &= ~KVM_EFER_LME;
 197
 198         vcpu->svm->vmcb->save.efer = efer | MSR_EFER_SVME_MASK;
 199         vcpu->shadow_efer = efer;
 200 }
 201
 202 static void svm_inject_gp(struct kvm_vcpu *vcpu, unsigned error_code)
 203 {
 204         vcpu->svm->vmcb->control.event_inj =    SVM_EVTINJ_VALID |
 205                                                 SVM_EVTINJ_VALID_ERR |
 206                                                 SVM_EVTINJ_TYPE_EXEPT |
 207                                                 GP_VECTOR;
 208         vcpu->svm->vmcb->control.event_inj_err = error_code;
 209 }
 210
 211 static void inject_ud(struct kvm_vcpu *vcpu)
 212 {
 213         vcpu->svm->vmcb->control.event_inj =    SVM_EVTINJ_VALID |
 214                                                 SVM_EVTINJ_TYPE_EXEPT |
 215                                                 UD_VECTOR;
 216 }
 217
 218 static int is_page_fault(uint32_t info)
 219 {
 220         info &= SVM_EVTINJ_VEC_MASK | SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
 221         return info == (PF_VECTOR | SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_EXEPT);
 222 }
 223
 224 static int is_external_interrupt(u32 info)
 225 {
 226         info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
 227         return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR);
 228 }
 229
 230 static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
 231 {
 232         if (!vcpu->svm->next_rip) {
 233                 printk(KERN_DEBUG "%s: NOP\n", __FUNCTION__);
 234                 return;
 235         }
 236         if (vcpu->svm->next_rip - vcpu->svm->vmcb->save.rip > 15) {
 237                 printk(KERN_ERR "%s: ip 0x%llx next 0x%llx\n",
 238                        __FUNCTION__,
 239                        vcpu->svm->vmcb->save.rip,
 240                        vcpu->svm->next_rip);
 241         }
 242
 243         vcpu->rip = vcpu->svm->vmcb->save.rip = vcpu->svm->next_rip;
 244         vcpu->svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK;
 245
 246         vcpu->interrupt_window_open = 1;
 247 }
 248
 249 static int has_svm(void)
 250 {
 251         uint32_t eax, ebx, ecx, edx;
 252
 253         if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD) {
 254                 printk(KERN_INFO "has_svm: not amd\n");
 255                 return 0;
 256         }
 257
 258         cpuid(0x80000000, &eax, &ebx, &ecx, &edx);
 259         if (eax < SVM_CPUID_FUNC) {
 260                 printk(KERN_INFO "has_svm: can't execute cpuid_8000000a\n");
 261                 return 0;
 262         }
 263
 264         cpuid(0x80000001, &eax, &ebx, &ecx, &edx);
 265         if (!(ecx & (1 << SVM_CPUID_FEATURE_SHIFT))) {
 266                 printk(KERN_DEBUG "has_svm: svm not available\n");
 267                 return 0;
 268         }
 269         return 1;
 270 }
 271
 272 static void svm_hardware_disable(void *garbage)
 273 {
 274         struct svm_cpu_data *svm_data
 275                 = per_cpu(svm_data, raw_smp_processor_id());
 276
 277         if (svm_data) {
 278                 uint64_t efer;
 279
 280                 wrmsrl(MSR_VM_HSAVE_PA, 0);
 281                 rdmsrl(MSR_EFER, efer);
 282                 wrmsrl(MSR_EFER, efer & ~MSR_EFER_SVME_MASK);
 283                 per_cpu(svm_data, raw_smp_processor_id()) = NULL;
 284                 __free_page(svm_data->save_area);
 285                 kfree(svm_data);
 286         }
 287 }
 288
 289 static void svm_hardware_enable(void *garbage)
 290 {
 291
 292         struct svm_cpu_data *svm_data;
 293         uint64_t efer;
 294 #ifdef CONFIG_X86_64
 295         struct desc_ptr gdt_descr;
 296 #else
 297         struct Xgt_desc_struct gdt_descr;
 298 #endif
 299         struct desc_struct *gdt;
 300         int me = raw_smp_processor_id();
 301
 302         if (!has_svm()) {
 303                 printk(KERN_ERR "svm_cpu_init: err EOPNOTSUPP on %d\n", me);
 304                 return;
 305         }
 306         svm_data = per_cpu(svm_data, me);
 307
 308         if (!svm_data) {
 309                 printk(KERN_ERR "svm_cpu_init: svm_data is NULL on %d\n",
 310                        me);
 311                 return;
 312         }
 313
 314         svm_data->asid_generation = 1;
 315         svm_data->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
 316         svm_data->next_asid = svm_data->max_asid + 1;
 317         svm_features = cpuid_edx(SVM_CPUID_FUNC);
 318
 319         asm volatile ( "sgdt %0" : "=m"(gdt_descr) );
 320         gdt = (struct desc_struct *)gdt_descr.address;
 321         svm_data->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
 322
 323         rdmsrl(MSR_EFER, efer);
 324         wrmsrl(MSR_EFER, efer | MSR_EFER_SVME_MASK);
 325
 326         wrmsrl(MSR_VM_HSAVE_PA,
 327                page_to_pfn(svm_data->save_area) << PAGE_SHIFT);
 328 }
 329
 330 static int svm_cpu_init(int cpu)
 331 {
 332         struct svm_cpu_data *svm_data;
 333         int r;
 334
 335         svm_data = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
 336         if (!svm_data)
 337                 return -ENOMEM;
 338         svm_data->cpu = cpu;
 339         svm_data->save_area = alloc_page(GFP_KERNEL);
 340         r = -ENOMEM;
 341         if (!svm_data->save_area)
 342                 goto err_1;
 343
 344         per_cpu(svm_data, cpu) = svm_data;
 345
 346         return 0;
 347
 348 err_1:
 349         kfree(svm_data);
 350         return r;
 351
 352 }
 353
 354 static int set_msr_interception(u32 *msrpm, unsigned msr,
 355                                 int read, int write)
 356 {
 357         int i;
 358
 359         for (i = 0; i < NUM_MSR_MAPS; i++) {
 360                 if (msr >= msrpm_ranges[i] &&
 361                     msr < msrpm_ranges[i] + MSRS_IN_RANGE) {
 362                         u32 msr_offset = (i * MSRS_IN_RANGE + msr -
 363                                           msrpm_ranges[i]) * 2;
 364
 365                         u32 *base = msrpm + (msr_offset / 32);
 366                         u32 msr_shift = msr_offset % 32;
 367                         u32 mask = ((write) ? 0 : 2) | ((read) ? 0 : 1);
 368                         *base = (*base & ~(0x3 << msr_shift)) |
 369                                 (mask << msr_shift);
 370                         return 1;
 371                 }
 372         }
 373         printk(KERN_DEBUG "%s: not found 0x%x\n", __FUNCTION__, msr);
 374         return 0;
 375 }
 376
 377 static __init int svm_hardware_setup(void)
 378 {
 379         int cpu;
 380         struct page *iopm_pages;
 381         struct page *msrpm_pages;
 382         void *iopm_va, *msrpm_va;
 383         int r;
 384
 385         kvm_emulator_want_group7_invlpg();
 386
 387         iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);
 388
 389         if (!iopm_pages)
 390                 return -ENOMEM;
 391
 392         iopm_va = page_address(iopm_pages);
 393         memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
 394         clear_bit(0x80, iopm_va); /* allow direct access to PC debug port */
 395         iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;
 396
 397
 398         msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
 399
 400         r = -ENOMEM;
 401         if (!msrpm_pages)
 402                 goto err_1;
 403
 404         msrpm_va = page_address(msrpm_pages);
 405         memset(msrpm_va, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));
 406         msrpm_base = page_to_pfn(msrpm_pages) << PAGE_SHIFT;
 407
 408 #ifdef CONFIG_X86_64
 409         set_msr_interception(msrpm_va, MSR_GS_BASE, 1, 1);
 410         set_msr_interception(msrpm_va, MSR_FS_BASE, 1, 1);
 411         set_msr_interception(msrpm_va, MSR_KERNEL_GS_BASE, 1, 1);
 412         set_msr_interception(msrpm_va, MSR_LSTAR, 1, 1);
 413         set_msr_interception(msrpm_va, MSR_CSTAR, 1, 1);
 414         set_msr_interception(msrpm_va, MSR_SYSCALL_MASK, 1, 1);
 415 #endif
 416         set_msr_interception(msrpm_va, MSR_K6_STAR, 1, 1);
 417         set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_CS, 1, 1);
 418         set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_ESP, 1, 1);
 419         set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_EIP, 1, 1);
 420
 421         for_each_online_cpu(cpu) {
 422                 r = svm_cpu_init(cpu);
 423                 if (r)
 424                         goto err_2;
 425         }
 426         return 0;
 427
 428 err_2:
 429         __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER);
 430         msrpm_base = 0;
 431 err_1:
 432         __free_pages(iopm_pages, IOPM_ALLOC_ORDER);
 433         iopm_base = 0;
 434         return r;
 435 }
 436
 437 static __exit void svm_hardware_unsetup(void)
 438 {
 439         __free_pages(pfn_to_page(msrpm_base >> PAGE_SHIFT), MSRPM_ALLOC_ORDER);
 440         __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
 441         iopm_base = msrpm_base = 0;
 442 }
 443
 444 static void init_seg(struct vmcb_seg *seg)
 445 {
 446         seg->selector = 0;
 447         seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK |
 448                 SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
 449         seg->limit = 0xffff;
 450         seg->base = 0;
 451 }
 452
 453 static void init_sys_seg(struct vmcb_seg *seg, uint32_t type)
 454 {
 455         seg->selector = 0;
 456         seg->attrib = SVM_SELECTOR_P_MASK | type;
 457         seg->limit = 0xffff;
 458         seg->base = 0;
 459 }
 460
 461 static int svm_vcpu_setup(struct kvm_vcpu *vcpu)
 462 {
 463         return 0;
 464 }
 465
 466 static void init_vmcb(struct vmcb *vmcb)
 467 {
 468         struct vmcb_control_area *control = &vmcb->control;
 469         struct vmcb_save_area *save = &vmcb->save;
 470
 471         control->intercept_cr_read =    INTERCEPT_CR0_MASK |
 472                                         INTERCEPT_CR3_MASK |
 473                                         INTERCEPT_CR4_MASK;
 474
 475         control->intercept_cr_write =   INTERCEPT_CR0_MASK |
 476                                         INTERCEPT_CR3_MASK |
 477                                         INTERCEPT_CR4_MASK;
 478
 479         control->intercept_dr_read =    INTERCEPT_DR0_MASK |
 480                                         INTERCEPT_DR1_MASK |
 481                                         INTERCEPT_DR2_MASK |
 482                                         INTERCEPT_DR3_MASK;
 483
 484         control->intercept_dr_write =   INTERCEPT_DR0_MASK |
 485                                         INTERCEPT_DR1_MASK |
 486                                         INTERCEPT_DR2_MASK |
 487                                         INTERCEPT_DR3_MASK |
 488                                         INTERCEPT_DR5_MASK |
 489                                         INTERCEPT_DR7_MASK;
 490
 491         control->intercept_exceptions = 1 << PF_VECTOR;
 492
 493
 494         control->intercept =    (1ULL << INTERCEPT_INTR) |
 495                                 (1ULL << INTERCEPT_NMI) |
 496                                 (1ULL << INTERCEPT_SMI) |
 497                 /*
 498                  * selective cr0 intercept bug?
 499                  *      0:   0f 22 d8                mov    %eax,%cr3
 500                  *      3:   0f 20 c0                mov    %cr0,%eax
 501                  *      6:   0d 00 00 00 80          or     $0x80000000,%eax
 502                  *      b:   0f 22 c0                mov    %eax,%cr0
 503                  * set cr3 ->interception
 504                  * get cr0 ->interception
 505                  * set cr0 -> no interception
 506                  */
 507                 /*              (1ULL << INTERCEPT_SELECTIVE_CR0) | */
 508                                 (1ULL << INTERCEPT_CPUID) |
 509                                 (1ULL << INTERCEPT_HLT) |
 510                                 (1ULL << INTERCEPT_INVLPGA) |
 511                                 (1ULL << INTERCEPT_IOIO_PROT) |
 512                                 (1ULL << INTERCEPT_MSR_PROT) |
 513                                 (1ULL << INTERCEPT_TASK_SWITCH) |
 514                                 (1ULL << INTERCEPT_SHUTDOWN) |
 515                                 (1ULL << INTERCEPT_VMRUN) |
 516                                 (1ULL << INTERCEPT_VMMCALL) |
 517                                 (1ULL << INTERCEPT_VMLOAD) |
 518                                 (1ULL << INTERCEPT_VMSAVE) |
 519                                 (1ULL << INTERCEPT_STGI) |
 520                                 (1ULL << INTERCEPT_CLGI) |
 521                                 (1ULL << INTERCEPT_SKINIT) |
 522                                 (1ULL << INTERCEPT_MONITOR) |
 523                                 (1ULL << INTERCEPT_MWAIT);
 524
 525         control->iopm_base_pa = iopm_base;
 526         control->msrpm_base_pa = msrpm_base;
 527         control->tsc_offset = 0;
 528         control->int_ctl = V_INTR_MASKING_MASK;
 529
 530         init_seg(&save->es);
 531         init_seg(&save->ss);
 532         init_seg(&save->ds);
 533         init_seg(&save->fs);
 534         init_seg(&save->gs);
 535
 536         save->cs.selector = 0xf000;
 537         /* Executable/Readable Code Segment */
 538         save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK |
 539                 SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK;
 540         save->cs.limit = 0xffff;
 541         /*
 542          * cs.base should really be 0xffff0000, but vmx can't handle that, so
 543          * be consistent with it.
 544          *
 545          * Replace when we have real mode working for vmx.
 546          */
 547         save->cs.base = 0xf0000;
 548
 549         save->gdtr.limit = 0xffff;
 550         save->idtr.limit = 0xffff;
 551
 552         init_sys_seg(&save->ldtr, SEG_TYPE_LDT);
 553         init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16);
 554
 555         save->efer = MSR_EFER_SVME_MASK;
 556
 557         save->dr6 = 0xffff0ff0;
 558         save->dr7 = 0x400;
 559         save->rflags = 2;
 560         save->rip = 0x0000fff0;
 561
 562         /*
 563          * cr0 val on cpu init should be 0x60000010, we enable cpu
 564          * cache by default. the orderly way is to enable cache in bios.
 565          */
 566         save->cr0 = 0x00000010 | X86_CR0_PG | X86_CR0_WP;
 567         save->cr4 = CR4_PAE_MASK;
 568         /* rdx = ?? */
 569 }
 570
 571 static int svm_create_vcpu(struct kvm_vcpu *vcpu)
 572 {
 573         struct page *page;
 574         int r;
 575
 576         r = -ENOMEM;
 577         vcpu->svm = kzalloc(sizeof *vcpu->svm, GFP_KERNEL);
 578         if (!vcpu->svm)
 579                 goto out1;
 580         page = alloc_page(GFP_KERNEL);
 581         if (!page)
 582                 goto out2;
 583
 584         vcpu->svm->vmcb = page_address(page);
 585         clear_page(vcpu->svm->vmcb);
 586         vcpu->svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT;
 587         vcpu->svm->asid_generation = 0;
 588         memset(vcpu->svm->db_regs, 0, sizeof(vcpu->svm->db_regs));
 589         init_vmcb(vcpu->svm->vmcb);
 590
 591         fx_init(vcpu);
 592         vcpu->fpu_active = 1;
 593         vcpu->apic_base = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
 594         if (vcpu->vcpu_id == 0)
 595                 vcpu->apic_base |= MSR_IA32_APICBASE_BSP;
 596
 597         return 0;
 598
 599 out2:
 600         kfree(vcpu->svm);
 601 out1:
 602         return r;
 603 }
 604
 605 static void svm_free_vcpu(struct kvm_vcpu *vcpu)
 606 {
 607         if (!vcpu->svm)
 608                 return;
 609         if (vcpu->svm->vmcb)
 610                 __free_page(pfn_to_page(vcpu->svm->vmcb_pa >> PAGE_SHIFT));
 611         kfree(vcpu->svm);
 612 }
 613
 614 static void svm_vcpu_load(struct kvm_vcpu *vcpu)
 615 {
 616         int cpu, i;
 617
 618         cpu = get_cpu();
 619         if (unlikely(cpu != vcpu->cpu)) {
 620                 u64 tsc_this, delta;
 621
 622                 /*
 623                  * Make sure that the guest sees a monotonically
 624                  * increasing TSC.
 625                  */
 626                 rdtscll(tsc_this);
 627                 delta = vcpu->host_tsc - tsc_this;
 628                 vcpu->svm->vmcb->control.tsc_offset += delta;
 629                 vcpu->cpu = cpu;
 630         }
 631
 632         for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
 633                 rdmsrl(host_save_user_msrs[i], vcpu->svm->host_user_msrs[i]);
 634 }
 635
 636 static void svm_vcpu_put(struct kvm_vcpu *vcpu)
 637 {
 638         int i;
 639
 640         for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
 641                 wrmsrl(host_save_user_msrs[i], vcpu->svm->host_user_msrs[i]);
 642
 643         rdtscll(vcpu->host_tsc);
 644         put_cpu();
 645 }
 646
 647 static void svm_vcpu_decache(struct kvm_vcpu *vcpu)
 648 {
 649 }
 650
 651 static void svm_cache_regs(struct kvm_vcpu *vcpu)
 652 {
 653         vcpu->regs[VCPU_REGS_RAX] = vcpu->svm->vmcb->save.rax;
 654         vcpu->regs[VCPU_REGS_RSP] = vcpu->svm->vmcb->save.rsp;
 655         vcpu->rip = vcpu->svm->vmcb->save.rip;
 656 }
 657
 658 static void svm_decache_regs(struct kvm_vcpu *vcpu)
 659 {
 660         vcpu->svm->vmcb->save.rax = vcpu->regs[VCPU_REGS_RAX];
 661         vcpu->svm->vmcb->save.rsp = vcpu->regs[VCPU_REGS_RSP];
 662         vcpu->svm->vmcb->save.rip = vcpu->rip;
 663 }
 664
 665 static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
 666 {
 667         return vcpu->svm->vmcb->save.rflags;
 668 }
 669
 670 static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
 671 {
 672         vcpu->svm->vmcb->save.rflags = rflags;
 673 }
 674
 675 static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
 676 {
 677         struct vmcb_save_area *save = &vcpu->svm->vmcb->save;
 678
 679         switch (seg) {
 680         case VCPU_SREG_CS: return &save->cs;
 681         case VCPU_SREG_DS: return &save->ds;
 682         case VCPU_SREG_ES: return &save->es;
 683         case VCPU_SREG_FS: return &save->fs;
 684         case VCPU_SREG_GS: return &save->gs;
 685         case VCPU_SREG_SS: return &save->ss;
 686         case VCPU_SREG_TR: return &save->tr;
 687         case VCPU_SREG_LDTR: return &save->ldtr;
 688         }
 689         BUG();
 690         return NULL;
 691 }
 692
 693 static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg)
 694 {
 695         struct vmcb_seg *s = svm_seg(vcpu, seg);
 696
 697         return s->base;
 698 }
 699
 700 static void svm_get_segment(struct kvm_vcpu *vcpu,
 701                             struct kvm_segment *var, int seg)
 702 {
 703         struct vmcb_seg *s = svm_seg(vcpu, seg);
 704
 705         var->base = s->base;
 706         var->limit = s->limit;
 707         var->selector = s->selector;
 708         var->type = s->attrib & SVM_SELECTOR_TYPE_MASK;
 709         var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1;
 710         var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3;
 711         var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1;
 712         var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1;
 713         var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
 714         var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
 715         var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1;
 716         var->unusable = !var->present;
 717 }
 718
 719 static void svm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
 720 {
 721         struct vmcb_seg *s = svm_seg(vcpu, VCPU_SREG_CS);
 722
 723         *db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
 724         *l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
 725 }
 726
 727 static void svm_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
 728 {
 729         dt->limit = vcpu->svm->vmcb->save.idtr.limit;
 730         dt->base = vcpu->svm->vmcb->save.idtr.base;
 731 }
 732
 733 static void svm_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
 734 {
 735         vcpu->svm->vmcb->save.idtr.limit = dt->limit;
 736         vcpu->svm->vmcb->save.idtr.base = dt->base ;
 737 }
 738
 739 static void svm_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
 740 {
 741         dt->limit = vcpu->svm->vmcb->save.gdtr.limit;
 742         dt->base = vcpu->svm->vmcb->save.gdtr.base;
 743 }
 744
 745 static void svm_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
 746 {
 747         vcpu->svm->vmcb->save.gdtr.limit = dt->limit;
 748         vcpu->svm->vmcb->save.gdtr.base = dt->base ;
 749 }
 750
 751 static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
 752 {
 753 }
 754
 755 static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
 756 {
 757 #ifdef CONFIG_X86_64
 758         if (vcpu->shadow_efer & KVM_EFER_LME) {
 759                 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
 760                         vcpu->shadow_efer |= KVM_EFER_LMA;
 761                         vcpu->svm->vmcb->save.efer |= KVM_EFER_LMA | KVM_EFER_LME;
 762                 }
 763
 764                 if (is_paging(vcpu) && !(cr0 & X86_CR0_PG) ) {
 765                         vcpu->shadow_efer &= ~KVM_EFER_LMA;
 766                         vcpu->svm->vmcb->save.efer &= ~(KVM_EFER_LMA | KVM_EFER_LME);
 767                 }
 768         }
 769 #endif
 770         if ((vcpu->cr0 & X86_CR0_TS) && !(cr0 & X86_CR0_TS)) {
 771                 vcpu->svm->vmcb->control.intercept_exceptions &= ~(1 << NM_VECTOR);
 772                 vcpu->fpu_active = 1;
 773         }
 774
 775         vcpu->cr0 = cr0;
 776         cr0 |= X86_CR0_PG | X86_CR0_WP;
 777         cr0 &= ~(X86_CR0_CD | X86_CR0_NW);
 778         vcpu->svm->vmcb->save.cr0 = cr0;
 779 }
 780
 781 static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
 782 {
 783        vcpu->cr4 = cr4;
 784        vcpu->svm->vmcb->save.cr4 = cr4 | CR4_PAE_MASK;
 785 }
 786
 787 static void svm_set_segment(struct kvm_vcpu *vcpu,
 788                             struct kvm_segment *var, int seg)
 789 {
 790         struct vmcb_seg *s = svm_seg(vcpu, seg);
 791
 792         s->base = var->base;
 793         s->limit = var->limit;
 794         s->selector = var->selector;
 795         if (var->unusable)
 796                 s->attrib = 0;
 797         else {
 798                 s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK);
 799                 s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT;
 800                 s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT;
 801                 s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT;
 802                 s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT;
 803                 s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT;
 804                 s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
 805                 s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
 806         }
 807         if (seg == VCPU_SREG_CS)
 808                 vcpu->svm->vmcb->save.cpl
 809                         = (vcpu->svm->vmcb->save.cs.attrib
 810                            >> SVM_SELECTOR_DPL_SHIFT) & 3;
 811
 812 }
 813
 814 /* FIXME:
 815
 816         vcpu->svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
 817         vcpu->svm->vmcb->control.int_ctl |= (sregs->cr8 & V_TPR_MASK);
 818
 819 */
 820
 821 static int svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg)
 822 {
 823         return -EOPNOTSUPP;
 824 }
 825
 826 static void load_host_msrs(struct kvm_vcpu *vcpu)
 827 {
 828 #ifdef CONFIG_X86_64
 829         wrmsrl(MSR_GS_BASE, vcpu->svm->host_gs_base);
 830 #endif
 831 }
 832
 833 static void save_host_msrs(struct kvm_vcpu *vcpu)
 834 {
 835 #ifdef CONFIG_X86_64
 836         rdmsrl(MSR_GS_BASE, vcpu->svm->host_gs_base);
 837 #endif
 838 }
 839
 840 static void new_asid(struct kvm_vcpu *vcpu, struct svm_cpu_data *svm_data)
 841 {
 842         if (svm_data->next_asid > svm_data->max_asid) {
 843                 ++svm_data->asid_generation;
 844                 svm_data->next_asid = 1;
 845                 vcpu->svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
 846         }
 847
 848         vcpu->cpu = svm_data->cpu;
 849         vcpu->svm->asid_generation = svm_data->asid_generation;
 850         vcpu->svm->vmcb->control.asid = svm_data->next_asid++;
 851 }
 852
 853 static void svm_invlpg(struct kvm_vcpu *vcpu, gva_t address)
 854 {
 855         invlpga(address, vcpu->svm->vmcb->control.asid); // is needed?
 856 }
 857
 858 static unsigned long svm_get_dr(struct kvm_vcpu *vcpu, int dr)
 859 {
 860         return vcpu->svm->db_regs[dr];
 861 }
 862
 863 static void svm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long value,
 864                        int *exception)
 865 {
 866         *exception = 0;
 867
 868         if (vcpu->svm->vmcb->save.dr7 & DR7_GD_MASK) {
 869                 vcpu->svm->vmcb->save.dr7 &= ~DR7_GD_MASK;
 870                 vcpu->svm->vmcb->save.dr6 |= DR6_BD_MASK;
 871                 *exception = DB_VECTOR;
 872                 return;
 873         }
 874
 875         switch (dr) {
 876         case 0 ... 3:
 877                 vcpu->svm->db_regs[dr] = value;
 878                 return;
 879         case 4 ... 5:
 880                 if (vcpu->cr4 & CR4_DE_MASK) {
 881                         *exception = UD_VECTOR;
 882                         return;
 883                 }
 884         case 7: {
 885                 if (value & ~((1ULL << 32) - 1)) {
 886                         *exception = GP_VECTOR;
 887                         return;
 888                 }
 889                 vcpu->svm->vmcb->save.dr7 = value;
 890                 return;
 891         }
 892         default:
 893                 printk(KERN_DEBUG "%s: unexpected dr %u\n",
 894                        __FUNCTION__, dr);
 895                 *exception = UD_VECTOR;
 896                 return;
 897         }
 898 }
 899
 900 static int pf_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 901 {
 902         u32 exit_int_info = vcpu->svm->vmcb->control.exit_int_info;
 903         u64 fault_address;
 904         u32 error_code;
 905         enum emulation_result er;
 906         int r;
 907
 908         if (is_external_interrupt(exit_int_info))
 909                 push_irq(vcpu, exit_int_info & SVM_EVTINJ_VEC_MASK);
 910
 911         spin_lock(&vcpu->kvm->lock);
 912
 913         fault_address  = vcpu->svm->vmcb->control.exit_info_2;
 914         error_code = vcpu->svm->vmcb->control.exit_info_1;
 915         r = kvm_mmu_page_fault(vcpu, fault_address, error_code);
 916         if (r < 0) {
 917                 spin_unlock(&vcpu->kvm->lock);
 918                 return r;
 919         }
 920         if (!r) {
 921                 spin_unlock(&vcpu->kvm->lock);
 922                 return 1;
 923         }
 924         er = emulate_instruction(vcpu, kvm_run, fault_address, error_code);
 925         spin_unlock(&vcpu->kvm->lock);
 926
 927         switch (er) {
 928         case EMULATE_DONE:
 929                 return 1;
 930         case EMULATE_DO_MMIO:
 931                 ++vcpu->stat.mmio_exits;
 932                 kvm_run->exit_reason = KVM_EXIT_MMIO;
 933                 return 0;
 934         case EMULATE_FAIL:
 935                 vcpu_printf(vcpu, "%s: emulate fail\n", __FUNCTION__);
 936                 break;
 937         default:
 938                 BUG();
 939         }
 940
 941         kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 942         return 0;
 943 }
 944
 945 static int nm_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 946 {
 947        vcpu->svm->vmcb->control.intercept_exceptions &= ~(1 << NM_VECTOR);
 948        if (!(vcpu->cr0 & X86_CR0_TS))
 949                vcpu->svm->vmcb->save.cr0 &= ~X86_CR0_TS;
 950        vcpu->fpu_active = 1;
 951
 952        return 1;
 953 }
 954
 955 static int shutdown_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 956 {
 957         /*
 958          * VMCB is undefined after a SHUTDOWN intercept
 959          * so reinitialize it.
 960          */
 961         clear_page(vcpu->svm->vmcb);
 962         init_vmcb(vcpu->svm->vmcb);
 963
 964         kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
 965         return 0;
 966 }
 967
 968 static int io_get_override(struct kvm_vcpu *vcpu,
 969                           struct vmcb_seg **seg,
 970                           int *addr_override)
 971 {
 972         u8 inst[MAX_INST_SIZE];
 973         unsigned ins_length;
 974         gva_t rip;
 975         int i;
 976
 977         rip =  vcpu->svm->vmcb->save.rip;
 978         ins_length = vcpu->svm->next_rip - rip;
 979         rip += vcpu->svm->vmcb->save.cs.base;
 980
 981         if (ins_length > MAX_INST_SIZE)
 982                 printk(KERN_DEBUG
 983                        "%s: inst length err, cs base 0x%llx rip 0x%llx "
 984                        "next rip 0x%llx ins_length %u\n",
 985                        __FUNCTION__,
 986                        vcpu->svm->vmcb->save.cs.base,
 987                        vcpu->svm->vmcb->save.rip,
 988                        vcpu->svm->vmcb->control.exit_info_2,
 989                        ins_length);
 990
 991         if (kvm_read_guest(vcpu, rip, ins_length, inst) != ins_length)
 992                 /* #PF */
 993                 return 0;
 994
 995         *addr_override = 0;
 996         *seg = NULL;
 997         for (i = 0; i < ins_length; i++)
 998                 switch (inst[i]) {
 999                 case 0xf0:
1000                 case 0xf2:
1001                 case 0xf3:
1002                 case 0x66:
1003                         continue;
1004                 case 0x67:
1005                         *addr_override = 1;
1006                         continue;
1007                 case 0x2e:
1008                         *seg = &vcpu->svm->vmcb->save.cs;
1009                         continue;
1010                 case 0x36:
1011                         *seg = &vcpu->svm->vmcb->save.ss;
1012                         continue;
1013                 case 0x3e:
1014                         *seg = &vcpu->svm->vmcb->save.ds;
1015                         continue;
1016                 case 0x26:
1017                         *seg = &vcpu->svm->vmcb->save.es;
1018                         continue;
1019                 case 0x64:
1020                         *seg = &vcpu->svm->vmcb->save.fs;
1021                         continue;
1022                 case 0x65:
1023                         *seg = &vcpu->svm->vmcb->save.gs;
1024                         continue;
1025                 default:
1026                         return 1;
1027                 }
1028         printk(KERN_DEBUG "%s: unexpected\n", __FUNCTION__);
1029         return 0;
1030 }
1031
1032 static unsigned long io_adress(struct kvm_vcpu *vcpu, int ins, gva_t *address)
1033 {
1034         unsigned long addr_mask;
1035         unsigned long *reg;
1036         struct vmcb_seg *seg;
1037         int addr_override;
1038         struct vmcb_save_area *save_area = &vcpu->svm->vmcb->save;
1039         u16 cs_attrib = save_area->cs.attrib;
1040         unsigned addr_size = get_addr_size(vcpu);
1041
1042         if (!io_get_override(vcpu, &seg, &addr_override))
1043                 return 0;
1044
1045         if (addr_override)
1046                 addr_size = (addr_size == 2) ? 4: (addr_size >> 1);
1047
1048         if (ins) {
1049                 reg = &vcpu->regs[VCPU_REGS_RDI];
1050                 seg = &vcpu->svm->vmcb->save.es;
1051         } else {
1052                 reg = &vcpu->regs[VCPU_REGS_RSI];
1053                 seg = (seg) ? seg : &vcpu->svm->vmcb->save.ds;
1054         }
1055
1056         addr_mask = ~0ULL >> (64 - (addr_size * 8));
1057
1058         if ((cs_attrib & SVM_SELECTOR_L_MASK) &&
1059             !(vcpu->svm->vmcb->save.rflags & X86_EFLAGS_VM)) {
1060                 *address = (*reg & addr_mask);
1061                 return addr_mask;
1062         }
1063
1064         if (!(seg->attrib & SVM_SELECTOR_P_SHIFT)) {
1065                 svm_inject_gp(vcpu, 0);
1066                 return 0;
1067         }
1068
1069         *address = (*reg & addr_mask) + seg->base;
1070         return addr_mask;
1071 }
1072
1073 static int io_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1074 {
1075         u32 io_info = vcpu->svm->vmcb->control.exit_info_1; //address size bug?
1076         int size, down, in, string, rep;
1077         unsigned port;
1078         unsigned long count;
1079         gva_t address = 0;
1080
1081         ++vcpu->stat.io_exits;
1082
1083         vcpu->svm->next_rip = vcpu->svm->vmcb->control.exit_info_2;
1084
1085         in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
1086         port = io_info >> 16;
1087         size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
1088         string = (io_info & SVM_IOIO_STR_MASK) != 0;
1089         rep = (io_info & SVM_IOIO_REP_MASK) != 0;
1090         count = 1;
1091         down = (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_DF) != 0;
1092
1093         if (string) {
1094                 unsigned addr_mask;
1095
1096                 addr_mask = io_adress(vcpu, in, &address);
1097                 if (!addr_mask) {
1098                         printk(KERN_DEBUG "%s: get io address failed\n",
1099                                __FUNCTION__);
1100                         return 1;
1101                 }
1102
1103                 if (rep)
1104                         count = vcpu->regs[VCPU_REGS_RCX] & addr_mask;
1105         }
1106         return kvm_setup_pio(vcpu, kvm_run, in, size, count, string, down,
1107                              address, rep, port);
1108 }
1109
1110 static int nop_on_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1111 {
1112         return 1;
1113 }
1114
1115 static int halt_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1116 {
1117         vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 1;
1118         skip_emulated_instruction(vcpu);
1119         return kvm_emulate_halt(vcpu);
1120 }
1121
1122 static int vmmcall_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1123 {
1124         vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 3;
1125         skip_emulated_instruction(vcpu);
1126         return kvm_hypercall(vcpu, kvm_run);
1127 }
1128
1129 static int invalid_op_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1130 {
1131         inject_ud(vcpu);
1132         return 1;
1133 }
1134
1135 static int task_switch_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1136 {
1137         printk(KERN_DEBUG "%s: task swiche is unsupported\n", __FUNCTION__);
1138         kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
1139         return 0;
1140 }
1141
1142 static int cpuid_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1143 {
1144         vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2;
1145         kvm_emulate_cpuid(vcpu);
1146         return 1;
1147 }
1148
1149 static int emulate_on_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1150 {
1151         if (emulate_instruction(vcpu, NULL, 0, 0) != EMULATE_DONE)
1152                 printk(KERN_ERR "%s: failed\n", __FUNCTION__);
1153         return 1;
1154 }
1155
1156 static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data)
1157 {
1158         switch (ecx) {
1159         case MSR_IA32_TIME_STAMP_COUNTER: {
1160                 u64 tsc;
1161
1162                 rdtscll(tsc);
1163                 *data = vcpu->svm->vmcb->control.tsc_offset + tsc;
1164                 break;
1165         }
1166         case MSR_K6_STAR:
1167                 *data = vcpu->svm->vmcb->save.star;
1168                 break;
1169 #ifdef CONFIG_X86_64
1170         case MSR_LSTAR:
1171                 *data = vcpu->svm->vmcb->save.lstar;
1172                 break;
1173         case MSR_CSTAR:
1174                 *data = vcpu->svm->vmcb->save.cstar;
1175                 break;
1176         case MSR_KERNEL_GS_BASE:
1177                 *data = vcpu->svm->vmcb->save.kernel_gs_base;
1178                 break;
1179         case MSR_SYSCALL_MASK:
1180                 *data = vcpu->svm->vmcb->save.sfmask;
1181                 break;
1182 #endif
1183         case MSR_IA32_SYSENTER_CS:
1184                 *data = vcpu->svm->vmcb->save.sysenter_cs;
1185                 break;
1186         case MSR_IA32_SYSENTER_EIP:
1187                 *data = vcpu->svm->vmcb->save.sysenter_eip;
1188                 break;
1189         case MSR_IA32_SYSENTER_ESP:
1190                 *data = vcpu->svm->vmcb->save.sysenter_esp;
1191                 break;
1192         default:
1193                 return kvm_get_msr_common(vcpu, ecx, data);
1194         }
1195         return 0;
1196 }
1197
1198 static int rdmsr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1199 {
1200         u32 ecx = vcpu->regs[VCPU_REGS_RCX];
1201         u64 data;
1202
1203         if (svm_get_msr(vcpu, ecx, &data))
1204                 svm_inject_gp(vcpu, 0);
1205         else {
1206                 vcpu->svm->vmcb->save.rax = data & 0xffffffff;
1207                 vcpu->regs[VCPU_REGS_RDX] = data >> 32;
1208                 vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2;
1209                 skip_emulated_instruction(vcpu);
1210         }
1211         return 1;
1212 }
1213
1214 static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data)
1215 {
1216         switch (ecx) {
1217         case MSR_IA32_TIME_STAMP_COUNTER: {
1218                 u64 tsc;
1219
1220                 rdtscll(tsc);
1221                 vcpu->svm->vmcb->control.tsc_offset = data - tsc;
1222                 break;
1223         }
1224         case MSR_K6_STAR:
1225                 vcpu->svm->vmcb->save.star = data;
1226                 break;
1227 #ifdef CONFIG_X86_64
1228         case MSR_LSTAR:
1229                 vcpu->svm->vmcb->save.lstar = data;
1230                 break;
1231         case MSR_CSTAR:
1232                 vcpu->svm->vmcb->save.cstar = data;
1233                 break;
1234         case MSR_KERNEL_GS_BASE:
1235                 vcpu->svm->vmcb->save.kernel_gs_base = data;
1236                 break;
1237         case MSR_SYSCALL_MASK:
1238                 vcpu->svm->vmcb->save.sfmask = data;
1239                 break;
1240 #endif
1241         case MSR_IA32_SYSENTER_CS:
1242                 vcpu->svm->vmcb->save.sysenter_cs = data;
1243                 break;
1244         case MSR_IA32_SYSENTER_EIP:
1245                 vcpu->svm->vmcb->save.sysenter_eip = data;
1246                 break;
1247         case MSR_IA32_SYSENTER_ESP:
1248                 vcpu->svm->vmcb->save.sysenter_esp = data;
1249                 break;
1250         default:
1251                 return kvm_set_msr_common(vcpu, ecx, data);
1252         }
1253         return 0;
1254 }
1255
1256 static int wrmsr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1257 {
1258         u32 ecx = vcpu->regs[VCPU_REGS_RCX];
1259         u64 data = (vcpu->svm->vmcb->save.rax & -1u)
1260                 | ((u64)(vcpu->regs[VCPU_REGS_RDX] & -1u) << 32);
1261         vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2;
1262         if (svm_set_msr(vcpu, ecx, data))
1263                 svm_inject_gp(vcpu, 0);
1264         else
1265                 skip_emulated_instruction(vcpu);
1266         return 1;
1267 }
1268
1269 static int msr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1270 {
1271         if (vcpu->svm->vmcb->control.exit_info_1)
1272                 return wrmsr_interception(vcpu, kvm_run);
1273         else
1274                 return rdmsr_interception(vcpu, kvm_run);
1275 }
1276
1277 static int interrupt_window_interception(struct kvm_vcpu *vcpu,
1278                                    struct kvm_run *kvm_run)
1279 {
1280         /*
1281          * If the user space waits to inject interrupts, exit as soon as
1282          * possible
1283          */
1284         if (kvm_run->request_interrupt_window &&
1285             !vcpu->irq_summary) {
1286                 ++vcpu->stat.irq_window_exits;
1287                 kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
1288                 return 0;
1289         }
1290
1291         return 1;
1292 }
1293
1294 static int (*svm_exit_handlers[])(struct kvm_vcpu *vcpu,
1295                                       struct kvm_run *kvm_run) = {
1296         [SVM_EXIT_READ_CR0]                     = emulate_on_interception,
1297         [SVM_EXIT_READ_CR3]                     = emulate_on_interception,
1298         [SVM_EXIT_READ_CR4]                     = emulate_on_interception,
1299         /* for now: */
1300         [SVM_EXIT_WRITE_CR0]                    = emulate_on_interception,
1301         [SVM_EXIT_WRITE_CR3]                    = emulate_on_interception,
1302         [SVM_EXIT_WRITE_CR4]                    = emulate_on_interception,
1303         [SVM_EXIT_READ_DR0]                     = emulate_on_interception,
1304         [SVM_EXIT_READ_DR1]                     = emulate_on_interception,
1305         [SVM_EXIT_READ_DR2]                     = emulate_on_interception,
1306         [SVM_EXIT_READ_DR3]                     = emulate_on_interception,
1307         [SVM_EXIT_WRITE_DR0]                    = emulate_on_interception,
1308         [SVM_EXIT_WRITE_DR1]                    = emulate_on_interception,
1309         [SVM_EXIT_WRITE_DR2]                    = emulate_on_interception,
1310         [SVM_EXIT_WRITE_DR3]                    = emulate_on_interception,
1311         [SVM_EXIT_WRITE_DR5]                    = emulate_on_interception,
1312         [SVM_EXIT_WRITE_DR7]                    = emulate_on_interception,
1313         [SVM_EXIT_EXCP_BASE + PF_VECTOR]        = pf_interception,
1314         [SVM_EXIT_EXCP_BASE + NM_VECTOR]        = nm_interception,
1315         [SVM_EXIT_INTR]                         = nop_on_interception,
1316         [SVM_EXIT_NMI]                          = nop_on_interception,
1317         [SVM_EXIT_SMI]                          = nop_on_interception,
1318         [SVM_EXIT_INIT]                         = nop_on_interception,
1319         [SVM_EXIT_VINTR]                        = interrupt_window_interception,
1320         /* [SVM_EXIT_CR0_SEL_WRITE]             = emulate_on_interception, */
1321         [SVM_EXIT_CPUID]                        = cpuid_interception,
1322         [SVM_EXIT_HLT]                          = halt_interception,
1323         [SVM_EXIT_INVLPG]                       = emulate_on_interception,
1324         [SVM_EXIT_INVLPGA]                      = invalid_op_interception,
1325         [SVM_EXIT_IOIO]                         = io_interception,
1326         [SVM_EXIT_MSR]                          = msr_interception,
1327         [SVM_EXIT_TASK_SWITCH]                  = task_switch_interception,
1328         [SVM_EXIT_SHUTDOWN]                     = shutdown_interception,
1329         [SVM_EXIT_VMRUN]                        = invalid_op_interception,
1330         [SVM_EXIT_VMMCALL]                      = vmmcall_interception,
1331         [SVM_EXIT_VMLOAD]                       = invalid_op_interception,
1332         [SVM_EXIT_VMSAVE]                       = invalid_op_interception,
1333         [SVM_EXIT_STGI]                         = invalid_op_interception,
1334         [SVM_EXIT_CLGI]                         = invalid_op_interception,
1335         [SVM_EXIT_SKINIT]                       = invalid_op_interception,
1336         [SVM_EXIT_MONITOR]                      = invalid_op_interception,
1337         [SVM_EXIT_MWAIT]                        = invalid_op_interception,
1338 };
1339
1340
1341 static int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1342 {
1343         u32 exit_code = vcpu->svm->vmcb->control.exit_code;
1344
1345         if (is_external_interrupt(vcpu->svm->vmcb->control.exit_int_info) &&
1346             exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR)
1347                 printk(KERN_ERR "%s: unexpected exit_ini_info 0x%x "
1348                        "exit_code 0x%x\n",
1349                        __FUNCTION__, vcpu->svm->vmcb->control.exit_int_info,
1350                        exit_code);
1351
1352         if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
1353             || svm_exit_handlers[exit_code] == 0) {
1354                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
1355                 kvm_run->hw.hardware_exit_reason = exit_code;
1356                 return 0;
1357         }
1358
1359         return svm_exit_handlers[exit_code](vcpu, kvm_run);
1360 }
1361
1362 static void reload_tss(struct kvm_vcpu *vcpu)
1363 {
1364         int cpu = raw_smp_processor_id();
1365
1366         struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
1367         svm_data->tss_desc->type = 9; //available 32/64-bit TSS
1368         load_TR_desc();
1369 }
1370
1371 static void pre_svm_run(struct kvm_vcpu *vcpu)
1372 {
1373         int cpu = raw_smp_processor_id();
1374
1375         struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
1376
1377         vcpu->svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
1378         if (vcpu->cpu != cpu ||
1379             vcpu->svm->asid_generation != svm_data->asid_generation)
1380                 new_asid(vcpu, svm_data);
1381 }
1382
1383
1384 static inline void kvm_do_inject_irq(struct kvm_vcpu *vcpu)
1385 {
1386         struct vmcb_control_area *control;
1387
1388         control = &vcpu->svm->vmcb->control;
1389         control->int_vector = pop_irq(vcpu);
1390         control->int_ctl &= ~V_INTR_PRIO_MASK;
1391         control->int_ctl |= V_IRQ_MASK |
1392                 ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
1393 }
1394
1395 static void kvm_reput_irq(struct kvm_vcpu *vcpu)
1396 {
1397         struct vmcb_control_area *control = &vcpu->svm->vmcb->control;
1398
1399         if (control->int_ctl & V_IRQ_MASK) {
1400                 control->int_ctl &= ~V_IRQ_MASK;
1401                 push_irq(vcpu, control->int_vector);
1402         }
1403
1404         vcpu->interrupt_window_open =
1405                 !(control->int_state & SVM_INTERRUPT_SHADOW_MASK);
1406 }
1407
1408 static void do_interrupt_requests(struct kvm_vcpu *vcpu,
1409                                        struct kvm_run *kvm_run)
1410 {
1411         struct vmcb_control_area *control = &vcpu->svm->vmcb->control;
1412
1413         vcpu->interrupt_window_open =
1414                 (!(control->int_state & SVM_INTERRUPT_SHADOW_MASK) &&
1415                  (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF));
1416
1417         if (vcpu->interrupt_window_open && vcpu->irq_summary)
1418                 /*
1419                  * If interrupts enabled, and not blocked by sti or mov ss. Good.
1420                  */
1421                 kvm_do_inject_irq(vcpu);
1422
1423         /*
1424          * Interrupts blocked.  Wait for unblock.
1425          */
1426         if (!vcpu->interrupt_window_open &&
1427             (vcpu->irq_summary || kvm_run->request_interrupt_window)) {
1428                 control->intercept |= 1ULL << INTERCEPT_VINTR;
1429         } else
1430                 control->intercept &= ~(1ULL << INTERCEPT_VINTR);
1431 }
1432
1433 static void post_kvm_run_save(struct kvm_vcpu *vcpu,
1434                               struct kvm_run *kvm_run)
1435 {
1436         kvm_run->ready_for_interrupt_injection = (vcpu->interrupt_window_open &&
1437                                                   vcpu->irq_summary == 0);
1438         kvm_run->if_flag = (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF) != 0;
1439         kvm_run->cr8 = vcpu->cr8;
1440         kvm_run->apic_base = vcpu->apic_base;
1441 }
1442
1443 /*
1444  * Check if userspace requested an interrupt window, and that the
1445  * interrupt window is open.
1446  *
1447  * No need to exit to userspace if we already have an interrupt queued.
1448  */
1449 static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
1450                                           struct kvm_run *kvm_run)
1451 {
1452         return (!vcpu->irq_summary &&
1453                 kvm_run->request_interrupt_window &&
1454                 vcpu->interrupt_window_open &&
1455                 (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF));
1456 }
1457
1458 static void save_db_regs(unsigned long *db_regs)
1459 {
1460         asm volatile ("mov %%dr0, %0" : "=r"(db_regs[0]));
1461         asm volatile ("mov %%dr1, %0" : "=r"(db_regs[1]));
1462         asm volatile ("mov %%dr2, %0" : "=r"(db_regs[2]));
1463         asm volatile ("mov %%dr3, %0" : "=r"(db_regs[3]));
1464 }
1465
1466 static void load_db_regs(unsigned long *db_regs)
1467 {
1468         asm volatile ("mov %0, %%dr0" : : "r"(db_regs[0]));
1469         asm volatile ("mov %0, %%dr1" : : "r"(db_regs[1]));
1470         asm volatile ("mov %0, %%dr2" : : "r"(db_regs[2]));
1471         asm volatile ("mov %0, %%dr3" : : "r"(db_regs[3]));
1472 }
1473
1474 static void svm_flush_tlb(struct kvm_vcpu *vcpu)
1475 {
1476         force_new_asid(vcpu);
1477 }
1478
1479 static int svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1480 {
1481         u16 fs_selector;
1482         u16 gs_selector;
1483         u16 ldt_selector;
1484         int r;
1485
1486 again:
1487         r = kvm_mmu_reload(vcpu);
1488         if (unlikely(r))
1489                 return r;
1490
1491         if (!vcpu->mmio_read_completed)
1492                 do_interrupt_requests(vcpu, kvm_run);
1493
1494         clgi();
1495
1496         vcpu->guest_mode = 1;
1497         if (vcpu->requests)
1498                 if (test_and_clear_bit(KVM_TLB_FLUSH, &vcpu->requests))
1499                     svm_flush_tlb(vcpu);
1500
1501         pre_svm_run(vcpu);
1502
1503         save_host_msrs(vcpu);
1504         fs_selector = read_fs();
1505         gs_selector = read_gs();
1506         ldt_selector = read_ldt();
1507         vcpu->svm->host_cr2 = kvm_read_cr2();
1508         vcpu->svm->host_dr6 = read_dr6();
1509         vcpu->svm->host_dr7 = read_dr7();
1510         vcpu->svm->vmcb->save.cr2 = vcpu->cr2;
1511
1512         if (vcpu->svm->vmcb->save.dr7 & 0xff) {
1513                 write_dr7(0);
1514                 save_db_regs(vcpu->svm->host_db_regs);
1515                 load_db_regs(vcpu->svm->db_regs);
1516         }
1517
1518         if (vcpu->fpu_active) {
1519                 fx_save(vcpu->host_fx_image);
1520                 fx_restore(vcpu->guest_fx_image);
1521         }
1522
1523         asm volatile (
1524 #ifdef CONFIG_X86_64
1525                 "push %%rbx; push %%rcx; push %%rdx;"
1526                 "push %%rsi; push %%rdi; push %%rbp;"
1527                 "push %%r8;  push %%r9;  push %%r10; push %%r11;"
1528                 "push %%r12; push %%r13; push %%r14; push %%r15;"
1529 #else
1530                 "push %%ebx; push %%ecx; push %%edx;"
1531                 "push %%esi; push %%edi; push %%ebp;"
1532 #endif
1533
1534 #ifdef CONFIG_X86_64
1535                 "mov %c[rbx](%[vcpu]), %%rbx \n\t"
1536                 "mov %c[rcx](%[vcpu]), %%rcx \n\t"
1537                 "mov %c[rdx](%[vcpu]), %%rdx \n\t"
1538                 "mov %c[rsi](%[vcpu]), %%rsi \n\t"
1539                 "mov %c[rdi](%[vcpu]), %%rdi \n\t"
1540                 "mov %c[rbp](%[vcpu]), %%rbp \n\t"
1541                 "mov %c[r8](%[vcpu]),  %%r8  \n\t"
1542                 "mov %c[r9](%[vcpu]),  %%r9  \n\t"
1543                 "mov %c[r10](%[vcpu]), %%r10 \n\t"
1544                 "mov %c[r11](%[vcpu]), %%r11 \n\t"
1545                 "mov %c[r12](%[vcpu]), %%r12 \n\t"
1546                 "mov %c[r13](%[vcpu]), %%r13 \n\t"
1547                 "mov %c[r14](%[vcpu]), %%r14 \n\t"
1548                 "mov %c[r15](%[vcpu]), %%r15 \n\t"
1549 #else
1550                 "mov %c[rbx](%[vcpu]), %%ebx \n\t"
1551                 "mov %c[rcx](%[vcpu]), %%ecx \n\t"
1552                 "mov %c[rdx](%[vcpu]), %%edx \n\t"
1553                 "mov %c[rsi](%[vcpu]), %%esi \n\t"
1554                 "mov %c[rdi](%[vcpu]), %%edi \n\t"
1555                 "mov %c[rbp](%[vcpu]), %%ebp \n\t"
1556 #endif
1557
1558 #ifdef CONFIG_X86_64
1559                 /* Enter guest mode */
1560                 "push %%rax \n\t"
1561                 "mov %c[svm](%[vcpu]), %%rax \n\t"
1562                 "mov %c[vmcb](%%rax), %%rax \n\t"
1563                 SVM_VMLOAD "\n\t"
1564                 SVM_VMRUN "\n\t"
1565                 SVM_VMSAVE "\n\t"
1566                 "pop %%rax \n\t"
1567 #else
1568                 /* Enter guest mode */
1569                 "push %%eax \n\t"
1570                 "mov %c[svm](%[vcpu]), %%eax \n\t"
1571                 "mov %c[vmcb](%%eax), %%eax \n\t"
1572                 SVM_VMLOAD "\n\t"
1573                 SVM_VMRUN "\n\t"
1574                 SVM_VMSAVE "\n\t"
1575                 "pop %%eax \n\t"
1576 #endif
1577
1578                 /* Save guest registers, load host registers */
1579 #ifdef CONFIG_X86_64
1580                 "mov %%rbx, %c[rbx](%[vcpu]) \n\t"
1581                 "mov %%rcx, %c[rcx](%[vcpu]) \n\t"
1582                 "mov %%rdx, %c[rdx](%[vcpu]) \n\t"
1583                 "mov %%rsi, %c[rsi](%[vcpu]) \n\t"
1584                 "mov %%rdi, %c[rdi](%[vcpu]) \n\t"
1585                 "mov %%rbp, %c[rbp](%[vcpu]) \n\t"
1586                 "mov %%r8,  %c[r8](%[vcpu]) \n\t"
1587                 "mov %%r9,  %c[r9](%[vcpu]) \n\t"
1588                 "mov %%r10, %c[r10](%[vcpu]) \n\t"
1589                 "mov %%r11, %c[r11](%[vcpu]) \n\t"
1590                 "mov %%r12, %c[r12](%[vcpu]) \n\t"
1591                 "mov %%r13, %c[r13](%[vcpu]) \n\t"
1592                 "mov %%r14, %c[r14](%[vcpu]) \n\t"
1593                 "mov %%r15, %c[r15](%[vcpu]) \n\t"
1594
1595                 "pop  %%r15; pop  %%r14; pop  %%r13; pop  %%r12;"
1596                 "pop  %%r11; pop  %%r10; pop  %%r9;  pop  %%r8;"
1597                 "pop  %%rbp; pop  %%rdi; pop  %%rsi;"
1598                 "pop  %%rdx; pop  %%rcx; pop  %%rbx; \n\t"
1599 #else
1600                 "mov %%ebx, %c[rbx](%[vcpu]) \n\t"
1601                 "mov %%ecx, %c[rcx](%[vcpu]) \n\t"
1602                 "mov %%edx, %c[rdx](%[vcpu]) \n\t"
1603                 "mov %%esi, %c[rsi](%[vcpu]) \n\t"
1604                 "mov %%edi, %c[rdi](%[vcpu]) \n\t"
1605                 "mov %%ebp, %c[rbp](%[vcpu]) \n\t"
1606
1607                 "pop  %%ebp; pop  %%edi; pop  %%esi;"
1608                 "pop  %%edx; pop  %%ecx; pop  %%ebx; \n\t"
1609 #endif
1610                 :
1611                 : [vcpu]"a"(vcpu),
1612                   [svm]"i"(offsetof(struct kvm_vcpu, svm)),
1613                   [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
1614                   [rbx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBX])),
1615                   [rcx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RCX])),
1616                   [rdx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RDX])),
1617                   [rsi]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RSI])),
1618                   [rdi]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RDI])),
1619                   [rbp]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBP]))
1620 #ifdef CONFIG_X86_64
1621                   ,[r8 ]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R8 ])),
1622                   [r9 ]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R9 ])),
1623                   [r10]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R10])),
1624                   [r11]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R11])),
1625                   [r12]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R12])),
1626                   [r13]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R13])),
1627                   [r14]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R14])),
1628                   [r15]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R15]))
1629 #endif
1630                 : "cc", "memory" );
1631
1632         vcpu->guest_mode = 0;
1633
1634         if (vcpu->fpu_active) {
1635                 fx_save(vcpu->guest_fx_image);
1636                 fx_restore(vcpu->host_fx_image);
1637         }
1638
1639         if ((vcpu->svm->vmcb->save.dr7 & 0xff))
1640                 load_db_regs(vcpu->svm->host_db_regs);
1641
1642         vcpu->cr2 = vcpu->svm->vmcb->save.cr2;
1643
1644         write_dr6(vcpu->svm->host_dr6);
1645         write_dr7(vcpu->svm->host_dr7);
1646         kvm_write_cr2(vcpu->svm->host_cr2);
1647
1648         load_fs(fs_selector);
1649         load_gs(gs_selector);
1650         load_ldt(ldt_selector);
1651         load_host_msrs(vcpu);
1652
1653         reload_tss(vcpu);
1654
1655         /*
1656          * Profile KVM exit RIPs:
1657          */
1658         if (unlikely(prof_on == KVM_PROFILING))
1659                 profile_hit(KVM_PROFILING,
1660                         (void *)(unsigned long)vcpu->svm->vmcb->save.rip);
1661
1662         stgi();
1663
1664         kvm_reput_irq(vcpu);
1665
1666         vcpu->svm->next_rip = 0;
1667
1668         if (vcpu->svm->vmcb->control.exit_code == SVM_EXIT_ERR) {
1669                 kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
1670                 kvm_run->fail_entry.hardware_entry_failure_reason
1671                         = vcpu->svm->vmcb->control.exit_code;
1672                 post_kvm_run_save(vcpu, kvm_run);
1673                 return 0;
1674         }
1675
1676         r = handle_exit(vcpu, kvm_run);
1677         if (r > 0) {
1678                 if (signal_pending(current)) {
1679                         ++vcpu->stat.signal_exits;
1680                         post_kvm_run_save(vcpu, kvm_run);
1681                         kvm_run->exit_reason = KVM_EXIT_INTR;
1682                         return -EINTR;
1683                 }
1684
1685                 if (dm_request_for_irq_injection(vcpu, kvm_run)) {
1686                         ++vcpu->stat.request_irq_exits;
1687                         post_kvm_run_save(vcpu, kvm_run);
1688                         kvm_run->exit_reason = KVM_EXIT_INTR;
1689                         return -EINTR;
1690                 }
1691                 kvm_resched(vcpu);
1692                 goto again;
1693         }
1694         post_kvm_run_save(vcpu, kvm_run);
1695         return r;
1696 }
1697
1698 static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
1699 {
1700         vcpu->svm->vmcb->save.cr3 = root;
1701         force_new_asid(vcpu);
1702
1703         if (vcpu->fpu_active) {
1704                 vcpu->svm->vmcb->control.intercept_exceptions |= (1 << NM_VECTOR);
1705                 vcpu->svm->vmcb->save.cr0 |= X86_CR0_TS;
1706                 vcpu->fpu_active = 0;
1707         }
1708 }
1709
1710 static void svm_inject_page_fault(struct kvm_vcpu *vcpu,
1711                                   unsigned long  addr,
1712                                   uint32_t err_code)
1713 {
1714         uint32_t exit_int_info = vcpu->svm->vmcb->control.exit_int_info;
1715
1716         ++vcpu->stat.pf_guest;
1717
1718         if (is_page_fault(exit_int_info)) {
1719
1720                 vcpu->svm->vmcb->control.event_inj_err = 0;
1721                 vcpu->svm->vmcb->control.event_inj =    SVM_EVTINJ_VALID |
1722                                                         SVM_EVTINJ_VALID_ERR |
1723                                                         SVM_EVTINJ_TYPE_EXEPT |
1724                                                         DF_VECTOR;
1725                 return;
1726         }
1727         vcpu->cr2 = addr;
1728         vcpu->svm->vmcb->save.cr2 = addr;
1729         vcpu->svm->vmcb->control.event_inj =    SVM_EVTINJ_VALID |
1730                                                 SVM_EVTINJ_VALID_ERR |
1731                                                 SVM_EVTINJ_TYPE_EXEPT |
1732                                                 PF_VECTOR;
1733         vcpu->svm->vmcb->control.event_inj_err = err_code;
1734 }
1735
1736
1737 static int is_disabled(void)
1738 {
1739         u64 vm_cr;
1740
1741         rdmsrl(MSR_VM_CR, vm_cr);
1742         if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE))
1743                 return 1;
1744
1745         return 0;
1746 }
1747
1748 static void
1749 svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
1750 {
1751         /*
1752          * Patch in the VMMCALL instruction:
1753          */
1754         hypercall[0] = 0x0f;
1755         hypercall[1] = 0x01;
1756         hypercall[2] = 0xd9;
1757         hypercall[3] = 0xc3;
1758 }
1759
1760 static struct kvm_arch_ops svm_arch_ops = {
1761         .cpu_has_kvm_support = has_svm,
1762         .disabled_by_bios = is_disabled,
1763         .hardware_setup = svm_hardware_setup,
1764         .hardware_unsetup = svm_hardware_unsetup,
1765         .hardware_enable = svm_hardware_enable,
1766         .hardware_disable = svm_hardware_disable,
1767
1768         .vcpu_create = svm_create_vcpu,
1769         .vcpu_free = svm_free_vcpu,
1770
1771         .vcpu_load = svm_vcpu_load,
1772         .vcpu_put = svm_vcpu_put,
1773         .vcpu_decache = svm_vcpu_decache,
1774
1775         .set_guest_debug = svm_guest_debug,
1776         .get_msr = svm_get_msr,
1777         .set_msr = svm_set_msr,
1778         .get_segment_base = svm_get_segment_base,
1779         .get_segment = svm_get_segment,
1780         .set_segment = svm_set_segment,
1781         .get_cs_db_l_bits = svm_get_cs_db_l_bits,
1782         .decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
1783         .set_cr0 = svm_set_cr0,
1784         .set_cr3 = svm_set_cr3,
1785         .set_cr4 = svm_set_cr4,
1786         .set_efer = svm_set_efer,
1787         .get_idt = svm_get_idt,
1788         .set_idt = svm_set_idt,
1789         .get_gdt = svm_get_gdt,
1790         .set_gdt = svm_set_gdt,
1791         .get_dr = svm_get_dr,
1792         .set_dr = svm_set_dr,
1793         .cache_regs = svm_cache_regs,
1794         .decache_regs = svm_decache_regs,
1795         .get_rflags = svm_get_rflags,
1796         .set_rflags = svm_set_rflags,
1797
1798         .invlpg = svm_invlpg,
1799         .tlb_flush = svm_flush_tlb,
1800         .inject_page_fault = svm_inject_page_fault,
1801
1802         .inject_gp = svm_inject_gp,
1803
1804         .run = svm_vcpu_run,
1805         .skip_emulated_instruction = skip_emulated_instruction,
1806         .vcpu_setup = svm_vcpu_setup,
1807         .patch_hypercall = svm_patch_hypercall,
1808 };
1809
1810 static int __init svm_init(void)
1811 {
1812         return kvm_init_arch(&svm_arch_ops, THIS_MODULE);
1813 }
1814
1815 static void __exit svm_exit(void)
1816 {
1817         kvm_exit_arch();
1818 }
1819
1820 module_init(svm_init)
1821 module_exit(svm_exit)