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 #include "irq.h"
  20
  21 #include <linux/module.h>
  22 #include <linux/kernel.h>
  23 #include <linux/vmalloc.h>
  24 #include <linux/highmem.h>
  25 #include <linux/profile.h>
  26 #include <linux/sched.h>
  27
  28 #include <asm/desc.h>
  29
  30 MODULE_AUTHOR("Qumranet");
  31 MODULE_LICENSE("GPL");
  32
  33 #define IOPM_ALLOC_ORDER 2
  34 #define MSRPM_ALLOC_ORDER 1
  35
  36 #define DB_VECTOR 1
  37 #define UD_VECTOR 6
  38 #define GP_VECTOR 13
  39
  40 #define DR7_GD_MASK (1 << 13)
  41 #define DR6_BD_MASK (1 << 13)
  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 static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu)
  54 {
  55         return container_of(vcpu, struct vcpu_svm, vcpu);
  56 }
  57
  58 unsigned long iopm_base;
  59 unsigned long msrpm_base;
  60
  61 struct kvm_ldttss_desc {
  62         u16 limit0;
  63         u16 base0;
  64         unsigned base1 : 8, type : 5, dpl : 2, p : 1;
  65         unsigned limit1 : 4, zero0 : 3, g : 1, base2 : 8;
  66         u32 base3;
  67         u32 zero1;
  68 } __attribute__((packed));
  69
  70 struct svm_cpu_data {
  71         int cpu;
  72
  73         u64 asid_generation;
  74         u32 max_asid;
  75         u32 next_asid;
  76         struct kvm_ldttss_desc *tss_desc;
  77
  78         struct page *save_area;
  79 };
  80
  81 static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);
  82 static uint32_t svm_features;
  83
  84 struct svm_init_data {
  85         int cpu;
  86         int r;
  87 };
  88
  89 static u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
  90
  91 #define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges)
  92 #define MSRS_RANGE_SIZE 2048
  93 #define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)
  94
  95 #define MAX_INST_SIZE 15
  96
  97 static inline u32 svm_has(u32 feat)
  98 {
  99         return svm_features & feat;
 100 }
 101
 102 static inline u8 pop_irq(struct kvm_vcpu *vcpu)
 103 {
 104         int word_index = __ffs(vcpu->irq_summary);
 105         int bit_index = __ffs(vcpu->irq_pending[word_index]);
 106         int irq = word_index * BITS_PER_LONG + bit_index;
 107
 108         clear_bit(bit_index, &vcpu->irq_pending[word_index]);
 109         if (!vcpu->irq_pending[word_index])
 110                 clear_bit(word_index, &vcpu->irq_summary);
 111         return irq;
 112 }
 113
 114 static inline void push_irq(struct kvm_vcpu *vcpu, u8 irq)
 115 {
 116         set_bit(irq, vcpu->irq_pending);
 117         set_bit(irq / BITS_PER_LONG, &vcpu->irq_summary);
 118 }
 119
 120 static inline void clgi(void)
 121 {
 122         asm volatile (SVM_CLGI);
 123 }
 124
 125 static inline void stgi(void)
 126 {
 127         asm volatile (SVM_STGI);
 128 }
 129
 130 static inline void invlpga(unsigned long addr, u32 asid)
 131 {
 132         asm volatile (SVM_INVLPGA :: "a"(addr), "c"(asid));
 133 }
 134
 135 static inline unsigned long kvm_read_cr2(void)
 136 {
 137         unsigned long cr2;
 138
 139         asm volatile ("mov %%cr2, %0" : "=r" (cr2));
 140         return cr2;
 141 }
 142
 143 static inline void kvm_write_cr2(unsigned long val)
 144 {
 145         asm volatile ("mov %0, %%cr2" :: "r" (val));
 146 }
 147
 148 static inline unsigned long read_dr6(void)
 149 {
 150         unsigned long dr6;
 151
 152         asm volatile ("mov %%dr6, %0" : "=r" (dr6));
 153         return dr6;
 154 }
 155
 156 static inline void write_dr6(unsigned long val)
 157 {
 158         asm volatile ("mov %0, %%dr6" :: "r" (val));
 159 }
 160
 161 static inline unsigned long read_dr7(void)
 162 {
 163         unsigned long dr7;
 164
 165         asm volatile ("mov %%dr7, %0" : "=r" (dr7));
 166         return dr7;
 167 }
 168
 169 static inline void write_dr7(unsigned long val)
 170 {
 171         asm volatile ("mov %0, %%dr7" :: "r" (val));
 172 }
 173
 174 static inline void force_new_asid(struct kvm_vcpu *vcpu)
 175 {
 176         to_svm(vcpu)->asid_generation--;
 177 }
 178
 179 static inline void flush_guest_tlb(struct kvm_vcpu *vcpu)
 180 {
 181         force_new_asid(vcpu);
 182 }
 183
 184 static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
 185 {
 186         if (!(efer & KVM_EFER_LMA))
 187                 efer &= ~KVM_EFER_LME;
 188
 189         to_svm(vcpu)->vmcb->save.efer = efer | MSR_EFER_SVME_MASK;
 190         vcpu->shadow_efer = efer;
 191 }
 192
 193 static void svm_inject_gp(struct kvm_vcpu *vcpu, unsigned error_code)
 194 {
 195         struct vcpu_svm *svm = to_svm(vcpu);
 196
 197         svm->vmcb->control.event_inj =          SVM_EVTINJ_VALID |
 198                                                 SVM_EVTINJ_VALID_ERR |
 199                                                 SVM_EVTINJ_TYPE_EXEPT |
 200                                                 GP_VECTOR;
 201         svm->vmcb->control.event_inj_err = error_code;
 202 }
 203
 204 static void inject_ud(struct kvm_vcpu *vcpu)
 205 {
 206         to_svm(vcpu)->vmcb->control.event_inj = SVM_EVTINJ_VALID |
 207                                                 SVM_EVTINJ_TYPE_EXEPT |
 208                                                 UD_VECTOR;
 209 }
 210
 211 static int is_page_fault(uint32_t info)
 212 {
 213         info &= SVM_EVTINJ_VEC_MASK | SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
 214         return info == (PF_VECTOR | SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_EXEPT);
 215 }
 216
 217 static int is_external_interrupt(u32 info)
 218 {
 219         info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
 220         return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR);
 221 }
 222
 223 static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
 224 {
 225         struct vcpu_svm *svm = to_svm(vcpu);
 226
 227         if (!svm->next_rip) {
 228                 printk(KERN_DEBUG "%s: NOP\n", __FUNCTION__);
 229                 return;
 230         }
 231         if (svm->next_rip - svm->vmcb->save.rip > MAX_INST_SIZE) {
 232                 printk(KERN_ERR "%s: ip 0x%llx next 0x%llx\n",
 233                        __FUNCTION__,
 234                        svm->vmcb->save.rip,
 235                        svm->next_rip);
 236         }
 237
 238         vcpu->rip = svm->vmcb->save.rip = svm->next_rip;
 239         svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK;
 240
 241         vcpu->interrupt_window_open = 1;
 242 }
 243
 244 static int has_svm(void)
 245 {
 246         uint32_t eax, ebx, ecx, edx;
 247
 248         if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD) {
 249                 printk(KERN_INFO "has_svm: not amd\n");
 250                 return 0;
 251         }
 252
 253         cpuid(0x80000000, &eax, &ebx, &ecx, &edx);
 254         if (eax < SVM_CPUID_FUNC) {
 255                 printk(KERN_INFO "has_svm: can't execute cpuid_8000000a\n");
 256                 return 0;
 257         }
 258
 259         cpuid(0x80000001, &eax, &ebx, &ecx, &edx);
 260         if (!(ecx & (1 << SVM_CPUID_FEATURE_SHIFT))) {
 261                 printk(KERN_DEBUG "has_svm: svm not available\n");
 262                 return 0;
 263         }
 264         return 1;
 265 }
 266
 267 static void svm_hardware_disable(void *garbage)
 268 {
 269         struct svm_cpu_data *svm_data
 270                 = per_cpu(svm_data, raw_smp_processor_id());
 271
 272         if (svm_data) {
 273                 uint64_t efer;
 274
 275                 wrmsrl(MSR_VM_HSAVE_PA, 0);
 276                 rdmsrl(MSR_EFER, efer);
 277                 wrmsrl(MSR_EFER, efer & ~MSR_EFER_SVME_MASK);
 278                 per_cpu(svm_data, raw_smp_processor_id()) = NULL;
 279                 __free_page(svm_data->save_area);
 280                 kfree(svm_data);
 281         }
 282 }
 283
 284 static void svm_hardware_enable(void *garbage)
 285 {
 286
 287         struct svm_cpu_data *svm_data;
 288         uint64_t efer;
 289 #ifdef CONFIG_X86_64
 290         struct desc_ptr gdt_descr;
 291 #else
 292         struct Xgt_desc_struct gdt_descr;
 293 #endif
 294         struct desc_struct *gdt;
 295         int me = raw_smp_processor_id();
 296
 297         if (!has_svm()) {
 298                 printk(KERN_ERR "svm_cpu_init: err EOPNOTSUPP on %d\n", me);
 299                 return;
 300         }
 301         svm_data = per_cpu(svm_data, me);
 302
 303         if (!svm_data) {
 304                 printk(KERN_ERR "svm_cpu_init: svm_data is NULL on %d\n",
 305                        me);
 306                 return;
 307         }
 308
 309         svm_data->asid_generation = 1;
 310         svm_data->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
 311         svm_data->next_asid = svm_data->max_asid + 1;
 312         svm_features = cpuid_edx(SVM_CPUID_FUNC);
 313
 314         asm volatile ( "sgdt %0" : "=m"(gdt_descr) );
 315         gdt = (struct desc_struct *)gdt_descr.address;
 316         svm_data->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
 317
 318         rdmsrl(MSR_EFER, efer);
 319         wrmsrl(MSR_EFER, efer | MSR_EFER_SVME_MASK);
 320
 321         wrmsrl(MSR_VM_HSAVE_PA,
 322                page_to_pfn(svm_data->save_area) << PAGE_SHIFT);
 323 }
 324
 325 static int svm_cpu_init(int cpu)
 326 {
 327         struct svm_cpu_data *svm_data;
 328         int r;
 329
 330         svm_data = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
 331         if (!svm_data)
 332                 return -ENOMEM;
 333         svm_data->cpu = cpu;
 334         svm_data->save_area = alloc_page(GFP_KERNEL);
 335         r = -ENOMEM;
 336         if (!svm_data->save_area)
 337                 goto err_1;
 338
 339         per_cpu(svm_data, cpu) = svm_data;
 340
 341         return 0;
 342
 343 err_1:
 344         kfree(svm_data);
 345         return r;
 346
 347 }
 348
 349 static void set_msr_interception(u32 *msrpm, unsigned msr,
 350                                  int read, int write)
 351 {
 352         int i;
 353
 354         for (i = 0; i < NUM_MSR_MAPS; i++) {
 355                 if (msr >= msrpm_ranges[i] &&
 356                     msr < msrpm_ranges[i] + MSRS_IN_RANGE) {
 357                         u32 msr_offset = (i * MSRS_IN_RANGE + msr -
 358                                           msrpm_ranges[i]) * 2;
 359
 360                         u32 *base = msrpm + (msr_offset / 32);
 361                         u32 msr_shift = msr_offset % 32;
 362                         u32 mask = ((write) ? 0 : 2) | ((read) ? 0 : 1);
 363                         *base = (*base & ~(0x3 << msr_shift)) |
 364                                 (mask << msr_shift);
 365                         return;
 366                 }
 367         }
 368         BUG();
 369 }
 370
 371 static __init int svm_hardware_setup(void)
 372 {
 373         int cpu;
 374         struct page *iopm_pages;
 375         struct page *msrpm_pages;
 376         void *iopm_va, *msrpm_va;
 377         int r;
 378
 379         iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);
 380
 381         if (!iopm_pages)
 382                 return -ENOMEM;
 383
 384         iopm_va = page_address(iopm_pages);
 385         memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
 386         clear_bit(0x80, iopm_va); /* allow direct access to PC debug port */
 387         iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;
 388
 389
 390         msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
 391
 392         r = -ENOMEM;
 393         if (!msrpm_pages)
 394                 goto err_1;
 395
 396         msrpm_va = page_address(msrpm_pages);
 397         memset(msrpm_va, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));
 398         msrpm_base = page_to_pfn(msrpm_pages) << PAGE_SHIFT;
 399
 400 #ifdef CONFIG_X86_64
 401         set_msr_interception(msrpm_va, MSR_GS_BASE, 1, 1);
 402         set_msr_interception(msrpm_va, MSR_FS_BASE, 1, 1);
 403         set_msr_interception(msrpm_va, MSR_KERNEL_GS_BASE, 1, 1);
 404         set_msr_interception(msrpm_va, MSR_LSTAR, 1, 1);
 405         set_msr_interception(msrpm_va, MSR_CSTAR, 1, 1);
 406         set_msr_interception(msrpm_va, MSR_SYSCALL_MASK, 1, 1);
 407 #endif
 408         set_msr_interception(msrpm_va, MSR_K6_STAR, 1, 1);
 409         set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_CS, 1, 1);
 410         set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_ESP, 1, 1);
 411         set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_EIP, 1, 1);
 412
 413         for_each_online_cpu(cpu) {
 414                 r = svm_cpu_init(cpu);
 415                 if (r)
 416                         goto err_2;
 417         }
 418         return 0;
 419
 420 err_2:
 421         __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER);
 422         msrpm_base = 0;
 423 err_1:
 424         __free_pages(iopm_pages, IOPM_ALLOC_ORDER);
 425         iopm_base = 0;
 426         return r;
 427 }
 428
 429 static __exit void svm_hardware_unsetup(void)
 430 {
 431         __free_pages(pfn_to_page(msrpm_base >> PAGE_SHIFT), MSRPM_ALLOC_ORDER);
 432         __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
 433         iopm_base = msrpm_base = 0;
 434 }
 435
 436 static void init_seg(struct vmcb_seg *seg)
 437 {
 438         seg->selector = 0;
 439         seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK |
 440                 SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
 441         seg->limit = 0xffff;
 442         seg->base = 0;
 443 }
 444
 445 static void init_sys_seg(struct vmcb_seg *seg, uint32_t type)
 446 {
 447         seg->selector = 0;
 448         seg->attrib = SVM_SELECTOR_P_MASK | type;
 449         seg->limit = 0xffff;
 450         seg->base = 0;
 451 }
 452
 453 static void init_vmcb(struct vmcb *vmcb)
 454 {
 455         struct vmcb_control_area *control = &vmcb->control;
 456         struct vmcb_save_area *save = &vmcb->save;
 457
 458         control->intercept_cr_read =    INTERCEPT_CR0_MASK |
 459                                         INTERCEPT_CR3_MASK |
 460                                         INTERCEPT_CR4_MASK;
 461
 462         control->intercept_cr_write =   INTERCEPT_CR0_MASK |
 463                                         INTERCEPT_CR3_MASK |
 464                                         INTERCEPT_CR4_MASK;
 465
 466         control->intercept_dr_read =    INTERCEPT_DR0_MASK |
 467                                         INTERCEPT_DR1_MASK |
 468                                         INTERCEPT_DR2_MASK |
 469                                         INTERCEPT_DR3_MASK;
 470
 471         control->intercept_dr_write =   INTERCEPT_DR0_MASK |
 472                                         INTERCEPT_DR1_MASK |
 473                                         INTERCEPT_DR2_MASK |
 474                                         INTERCEPT_DR3_MASK |
 475                                         INTERCEPT_DR5_MASK |
 476                                         INTERCEPT_DR7_MASK;
 477
 478         control->intercept_exceptions = 1 << PF_VECTOR;
 479
 480
 481         control->intercept =    (1ULL << INTERCEPT_INTR) |
 482                                 (1ULL << INTERCEPT_NMI) |
 483                                 (1ULL << INTERCEPT_SMI) |
 484                 /*
 485                  * selective cr0 intercept bug?
 486                  *      0:   0f 22 d8                mov    %eax,%cr3
 487                  *      3:   0f 20 c0                mov    %cr0,%eax
 488                  *      6:   0d 00 00 00 80          or     $0x80000000,%eax
 489                  *      b:   0f 22 c0                mov    %eax,%cr0
 490                  * set cr3 ->interception
 491                  * get cr0 ->interception
 492                  * set cr0 -> no interception
 493                  */
 494                 /*              (1ULL << INTERCEPT_SELECTIVE_CR0) | */
 495                                 (1ULL << INTERCEPT_CPUID) |
 496                                 (1ULL << INTERCEPT_HLT) |
 497                                 (1ULL << INTERCEPT_INVLPGA) |
 498                                 (1ULL << INTERCEPT_IOIO_PROT) |
 499                                 (1ULL << INTERCEPT_MSR_PROT) |
 500                                 (1ULL << INTERCEPT_TASK_SWITCH) |
 501                                 (1ULL << INTERCEPT_SHUTDOWN) |
 502                                 (1ULL << INTERCEPT_VMRUN) |
 503                                 (1ULL << INTERCEPT_VMMCALL) |
 504                                 (1ULL << INTERCEPT_VMLOAD) |
 505                                 (1ULL << INTERCEPT_VMSAVE) |
 506                                 (1ULL << INTERCEPT_STGI) |
 507                                 (1ULL << INTERCEPT_CLGI) |
 508                                 (1ULL << INTERCEPT_SKINIT) |
 509                                 (1ULL << INTERCEPT_MONITOR) |
 510                                 (1ULL << INTERCEPT_MWAIT);
 511
 512         control->iopm_base_pa = iopm_base;
 513         control->msrpm_base_pa = msrpm_base;
 514         control->tsc_offset = 0;
 515         control->int_ctl = V_INTR_MASKING_MASK;
 516
 517         init_seg(&save->es);
 518         init_seg(&save->ss);
 519         init_seg(&save->ds);
 520         init_seg(&save->fs);
 521         init_seg(&save->gs);
 522
 523         save->cs.selector = 0xf000;
 524         /* Executable/Readable Code Segment */
 525         save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK |
 526                 SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK;
 527         save->cs.limit = 0xffff;
 528         /*
 529          * cs.base should really be 0xffff0000, but vmx can't handle that, so
 530          * be consistent with it.
 531          *
 532          * Replace when we have real mode working for vmx.
 533          */
 534         save->cs.base = 0xf0000;
 535
 536         save->gdtr.limit = 0xffff;
 537         save->idtr.limit = 0xffff;
 538
 539         init_sys_seg(&save->ldtr, SEG_TYPE_LDT);
 540         init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16);
 541
 542         save->efer = MSR_EFER_SVME_MASK;
 543
 544         save->dr6 = 0xffff0ff0;
 545         save->dr7 = 0x400;
 546         save->rflags = 2;
 547         save->rip = 0x0000fff0;
 548
 549         /*
 550          * cr0 val on cpu init should be 0x60000010, we enable cpu
 551          * cache by default. the orderly way is to enable cache in bios.
 552          */
 553         save->cr0 = 0x00000010 | X86_CR0_PG | X86_CR0_WP;
 554         save->cr4 = X86_CR4_PAE;
 555         /* rdx = ?? */
 556 }
 557
 558 static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
 559 {
 560         struct vcpu_svm *svm;
 561         struct page *page;
 562         int err;
 563
 564         svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
 565         if (!svm) {
 566                 err = -ENOMEM;
 567                 goto out;
 568         }
 569
 570         err = kvm_vcpu_init(&svm->vcpu, kvm, id);
 571         if (err)
 572                 goto free_svm;
 573
 574         if (irqchip_in_kernel(kvm)) {
 575                 err = kvm_create_lapic(&svm->vcpu);
 576                 if (err < 0)
 577                         goto free_svm;
 578         }
 579
 580         page = alloc_page(GFP_KERNEL);
 581         if (!page) {
 582                 err = -ENOMEM;
 583                 goto uninit;
 584         }
 585
 586         svm->vmcb = page_address(page);
 587         clear_page(svm->vmcb);
 588         svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT;
 589         svm->asid_generation = 0;
 590         memset(svm->db_regs, 0, sizeof(svm->db_regs));
 591         init_vmcb(svm->vmcb);
 592
 593         fx_init(&svm->vcpu);
 594         svm->vcpu.fpu_active = 1;
 595         svm->vcpu.apic_base = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
 596         if (svm->vcpu.vcpu_id == 0)
 597                 svm->vcpu.apic_base |= MSR_IA32_APICBASE_BSP;
 598
 599         return &svm->vcpu;
 600
 601 uninit:
 602         kvm_vcpu_uninit(&svm->vcpu);
 603 free_svm:
 604         kmem_cache_free(kvm_vcpu_cache, svm);
 605 out:
 606         return ERR_PTR(err);
 607 }
 608
 609 static void svm_free_vcpu(struct kvm_vcpu *vcpu)
 610 {
 611         struct vcpu_svm *svm = to_svm(vcpu);
 612
 613         __free_page(pfn_to_page(svm->vmcb_pa >> PAGE_SHIFT));
 614         kvm_vcpu_uninit(vcpu);
 615         kmem_cache_free(kvm_vcpu_cache, svm);
 616 }
 617
 618 static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 619 {
 620         struct vcpu_svm *svm = to_svm(vcpu);
 621         int i;
 622
 623         if (unlikely(cpu != vcpu->cpu)) {
 624                 u64 tsc_this, delta;
 625
 626                 /*
 627                  * Make sure that the guest sees a monotonically
 628                  * increasing TSC.
 629                  */
 630                 rdtscll(tsc_this);
 631                 delta = vcpu->host_tsc - tsc_this;
 632                 svm->vmcb->control.tsc_offset += delta;
 633                 vcpu->cpu = cpu;
 634                 kvm_migrate_apic_timer(vcpu);
 635         }
 636
 637         for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
 638                 rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
 639 }
 640
 641 static void svm_vcpu_put(struct kvm_vcpu *vcpu)
 642 {
 643         struct vcpu_svm *svm = to_svm(vcpu);
 644         int i;
 645
 646         for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
 647                 wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
 648
 649         rdtscll(vcpu->host_tsc);
 650 }
 651
 652 static void svm_vcpu_decache(struct kvm_vcpu *vcpu)
 653 {
 654 }
 655
 656 static void svm_cache_regs(struct kvm_vcpu *vcpu)
 657 {
 658         struct vcpu_svm *svm = to_svm(vcpu);
 659
 660         vcpu->regs[VCPU_REGS_RAX] = svm->vmcb->save.rax;
 661         vcpu->regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp;
 662         vcpu->rip = svm->vmcb->save.rip;
 663 }
 664
 665 static void svm_decache_regs(struct kvm_vcpu *vcpu)
 666 {
 667         struct vcpu_svm *svm = to_svm(vcpu);
 668         svm->vmcb->save.rax = vcpu->regs[VCPU_REGS_RAX];
 669         svm->vmcb->save.rsp = vcpu->regs[VCPU_REGS_RSP];
 670         svm->vmcb->save.rip = vcpu->rip;
 671 }
 672
 673 static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
 674 {
 675         return to_svm(vcpu)->vmcb->save.rflags;
 676 }
 677
 678 static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
 679 {
 680         to_svm(vcpu)->vmcb->save.rflags = rflags;
 681 }
 682
 683 static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
 684 {
 685         struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
 686
 687         switch (seg) {
 688         case VCPU_SREG_CS: return &save->cs;
 689         case VCPU_SREG_DS: return &save->ds;
 690         case VCPU_SREG_ES: return &save->es;
 691         case VCPU_SREG_FS: return &save->fs;
 692         case VCPU_SREG_GS: return &save->gs;
 693         case VCPU_SREG_SS: return &save->ss;
 694         case VCPU_SREG_TR: return &save->tr;
 695         case VCPU_SREG_LDTR: return &save->ldtr;
 696         }
 697         BUG();
 698         return NULL;
 699 }
 700
 701 static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg)
 702 {
 703         struct vmcb_seg *s = svm_seg(vcpu, seg);
 704
 705         return s->base;
 706 }
 707
 708 static void svm_get_segment(struct kvm_vcpu *vcpu,
 709                             struct kvm_segment *var, int seg)
 710 {
 711         struct vmcb_seg *s = svm_seg(vcpu, seg);
 712
 713         var->base = s->base;
 714         var->limit = s->limit;
 715         var->selector = s->selector;
 716         var->type = s->attrib & SVM_SELECTOR_TYPE_MASK;
 717         var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1;
 718         var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3;
 719         var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1;
 720         var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1;
 721         var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
 722         var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
 723         var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1;
 724         var->unusable = !var->present;
 725 }
 726
 727 static void svm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
 728 {
 729         struct vmcb_seg *s = svm_seg(vcpu, VCPU_SREG_CS);
 730
 731         *db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
 732         *l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
 733 }
 734
 735 static void svm_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
 736 {
 737         struct vcpu_svm *svm = to_svm(vcpu);
 738
 739         dt->limit = svm->vmcb->save.idtr.limit;
 740         dt->base = svm->vmcb->save.idtr.base;
 741 }
 742
 743 static void svm_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
 744 {
 745         struct vcpu_svm *svm = to_svm(vcpu);
 746
 747         svm->vmcb->save.idtr.limit = dt->limit;
 748         svm->vmcb->save.idtr.base = dt->base ;
 749 }
 750
 751 static void svm_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
 752 {
 753         struct vcpu_svm *svm = to_svm(vcpu);
 754
 755         dt->limit = svm->vmcb->save.gdtr.limit;
 756         dt->base = svm->vmcb->save.gdtr.base;
 757 }
 758
 759 static void svm_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
 760 {
 761         struct vcpu_svm *svm = to_svm(vcpu);
 762
 763         svm->vmcb->save.gdtr.limit = dt->limit;
 764         svm->vmcb->save.gdtr.base = dt->base ;
 765 }
 766
 767 static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
 768 {
 769 }
 770
 771 static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
 772 {
 773         struct vcpu_svm *svm = to_svm(vcpu);
 774
 775 #ifdef CONFIG_X86_64
 776         if (vcpu->shadow_efer & KVM_EFER_LME) {
 777                 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
 778                         vcpu->shadow_efer |= KVM_EFER_LMA;
 779                         svm->vmcb->save.efer |= KVM_EFER_LMA | KVM_EFER_LME;
 780                 }
 781
 782                 if (is_paging(vcpu) && !(cr0 & X86_CR0_PG) ) {
 783                         vcpu->shadow_efer &= ~KVM_EFER_LMA;
 784                         svm->vmcb->save.efer &= ~(KVM_EFER_LMA | KVM_EFER_LME);
 785                 }
 786         }
 787 #endif
 788         if ((vcpu->cr0 & X86_CR0_TS) && !(cr0 & X86_CR0_TS)) {
 789                 svm->vmcb->control.intercept_exceptions &= ~(1 << NM_VECTOR);
 790                 vcpu->fpu_active = 1;
 791         }
 792
 793         vcpu->cr0 = cr0;
 794         cr0 |= X86_CR0_PG | X86_CR0_WP;
 795         cr0 &= ~(X86_CR0_CD | X86_CR0_NW);
 796         svm->vmcb->save.cr0 = cr0;
 797 }
 798
 799 static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
 800 {
 801        vcpu->cr4 = cr4;
 802        to_svm(vcpu)->vmcb->save.cr4 = cr4 | X86_CR4_PAE;
 803 }
 804
 805 static void svm_set_segment(struct kvm_vcpu *vcpu,
 806                             struct kvm_segment *var, int seg)
 807 {
 808         struct vcpu_svm *svm = to_svm(vcpu);
 809         struct vmcb_seg *s = svm_seg(vcpu, seg);
 810
 811         s->base = var->base;
 812         s->limit = var->limit;
 813         s->selector = var->selector;
 814         if (var->unusable)
 815                 s->attrib = 0;
 816         else {
 817                 s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK);
 818                 s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT;
 819                 s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT;
 820                 s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT;
 821                 s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT;
 822                 s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT;
 823                 s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
 824                 s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
 825         }
 826         if (seg == VCPU_SREG_CS)
 827                 svm->vmcb->save.cpl
 828                         = (svm->vmcb->save.cs.attrib
 829                            >> SVM_SELECTOR_DPL_SHIFT) & 3;
 830
 831 }
 832
 833 /* FIXME:
 834
 835         svm(vcpu)->vmcb->control.int_ctl &= ~V_TPR_MASK;
 836         svm(vcpu)->vmcb->control.int_ctl |= (sregs->cr8 & V_TPR_MASK);
 837
 838 */
 839
 840 static int svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg)
 841 {
 842         return -EOPNOTSUPP;
 843 }
 844
 845 static int svm_get_irq(struct kvm_vcpu *vcpu)
 846 {
 847         struct vcpu_svm *svm = to_svm(vcpu);
 848         u32 exit_int_info = svm->vmcb->control.exit_int_info;
 849
 850         if (is_external_interrupt(exit_int_info))
 851                 return exit_int_info & SVM_EVTINJ_VEC_MASK;
 852         return -1;
 853 }
 854
 855 static void load_host_msrs(struct kvm_vcpu *vcpu)
 856 {
 857 #ifdef CONFIG_X86_64
 858         wrmsrl(MSR_GS_BASE, to_svm(vcpu)->host_gs_base);
 859 #endif
 860 }
 861
 862 static void save_host_msrs(struct kvm_vcpu *vcpu)
 863 {
 864 #ifdef CONFIG_X86_64
 865         rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host_gs_base);
 866 #endif
 867 }
 868
 869 static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *svm_data)
 870 {
 871         if (svm_data->next_asid > svm_data->max_asid) {
 872                 ++svm_data->asid_generation;
 873                 svm_data->next_asid = 1;
 874                 svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
 875         }
 876
 877         svm->vcpu.cpu = svm_data->cpu;
 878         svm->asid_generation = svm_data->asid_generation;
 879         svm->vmcb->control.asid = svm_data->next_asid++;
 880 }
 881
 882 static unsigned long svm_get_dr(struct kvm_vcpu *vcpu, int dr)
 883 {
 884         return to_svm(vcpu)->db_regs[dr];
 885 }
 886
 887 static void svm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long value,
 888                        int *exception)
 889 {
 890         struct vcpu_svm *svm = to_svm(vcpu);
 891
 892         *exception = 0;
 893
 894         if (svm->vmcb->save.dr7 & DR7_GD_MASK) {
 895                 svm->vmcb->save.dr7 &= ~DR7_GD_MASK;
 896                 svm->vmcb->save.dr6 |= DR6_BD_MASK;
 897                 *exception = DB_VECTOR;
 898                 return;
 899         }
 900
 901         switch (dr) {
 902         case 0 ... 3:
 903                 svm->db_regs[dr] = value;
 904                 return;
 905         case 4 ... 5:
 906                 if (vcpu->cr4 & X86_CR4_DE) {
 907                         *exception = UD_VECTOR;
 908                         return;
 909                 }
 910         case 7: {
 911                 if (value & ~((1ULL << 32) - 1)) {
 912                         *exception = GP_VECTOR;
 913                         return;
 914                 }
 915                 svm->vmcb->save.dr7 = value;
 916                 return;
 917         }
 918         default:
 919                 printk(KERN_DEBUG "%s: unexpected dr %u\n",
 920                        __FUNCTION__, dr);
 921                 *exception = UD_VECTOR;
 922                 return;
 923         }
 924 }
 925
 926 static int pf_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
 927 {
 928         u32 exit_int_info = svm->vmcb->control.exit_int_info;
 929         struct kvm *kvm = svm->vcpu.kvm;
 930         u64 fault_address;
 931         u32 error_code;
 932         enum emulation_result er;
 933         int r;
 934
 935         if (!irqchip_in_kernel(kvm) &&
 936                 is_external_interrupt(exit_int_info))
 937                 push_irq(&svm->vcpu, exit_int_info & SVM_EVTINJ_VEC_MASK);
 938
 939         mutex_lock(&kvm->lock);
 940
 941         fault_address  = svm->vmcb->control.exit_info_2;
 942         error_code = svm->vmcb->control.exit_info_1;
 943         r = kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code);
 944         if (r < 0) {
 945                 mutex_unlock(&kvm->lock);
 946                 return r;
 947         }
 948         if (!r) {
 949                 mutex_unlock(&kvm->lock);
 950                 return 1;
 951         }
 952         er = emulate_instruction(&svm->vcpu, kvm_run, fault_address,
 953                                  error_code);
 954         mutex_unlock(&kvm->lock);
 955
 956         switch (er) {
 957         case EMULATE_DONE:
 958                 return 1;
 959         case EMULATE_DO_MMIO:
 960                 ++svm->vcpu.stat.mmio_exits;
 961                 return 0;
 962         case EMULATE_FAIL:
 963                 vcpu_printf(&svm->vcpu, "%s: emulate fail\n", __FUNCTION__);
 964                 break;
 965         default:
 966                 BUG();
 967         }
 968
 969         kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 970         return 0;
 971 }
 972
 973 static int nm_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
 974 {
 975         svm->vmcb->control.intercept_exceptions &= ~(1 << NM_VECTOR);
 976         if (!(svm->vcpu.cr0 & X86_CR0_TS))
 977                 svm->vmcb->save.cr0 &= ~X86_CR0_TS;
 978         svm->vcpu.fpu_active = 1;
 979
 980         return 1;
 981 }
 982
 983 static int shutdown_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
 984 {
 985         /*
 986          * VMCB is undefined after a SHUTDOWN intercept
 987          * so reinitialize it.
 988          */
 989         clear_page(svm->vmcb);
 990         init_vmcb(svm->vmcb);
 991
 992         kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
 993         return 0;
 994 }
 995
 996 static int io_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
 997 {
 998         u32 io_info = svm->vmcb->control.exit_info_1; //address size bug?
 999         int size, down, in, string, rep;
1000         unsigned port;
1001
1002         ++svm->vcpu.stat.io_exits;
1003
1004         svm->next_rip = svm->vmcb->control.exit_info_2;
1005
1006         string = (io_info & SVM_IOIO_STR_MASK) != 0;
1007
1008         if (string) {
1009                 if (emulate_instruction(&svm->vcpu, kvm_run, 0, 0) == EMULATE_DO_MMIO)
1010                         return 0;
1011                 return 1;
1012         }
1013
1014         in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
1015         port = io_info >> 16;
1016         size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
1017         rep = (io_info & SVM_IOIO_REP_MASK) != 0;
1018         down = (svm->vmcb->save.rflags & X86_EFLAGS_DF) != 0;
1019
1020         return kvm_emulate_pio(&svm->vcpu, kvm_run, in, size, port);
1021 }
1022
1023 static int nop_on_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
1024 {
1025         return 1;
1026 }
1027
1028 static int halt_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
1029 {
1030         svm->next_rip = svm->vmcb->save.rip + 1;
1031         skip_emulated_instruction(&svm->vcpu);
1032         return kvm_emulate_halt(&svm->vcpu);
1033 }
1034
1035 static int vmmcall_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
1036 {
1037         svm->next_rip = svm->vmcb->save.rip + 3;
1038         skip_emulated_instruction(&svm->vcpu);
1039         return kvm_hypercall(&svm->vcpu, kvm_run);
1040 }
1041
1042 static int invalid_op_interception(struct vcpu_svm *svm,
1043                                    struct kvm_run *kvm_run)
1044 {
1045         inject_ud(&svm->vcpu);
1046         return 1;
1047 }
1048
1049 static int task_switch_interception(struct vcpu_svm *svm,
1050                                     struct kvm_run *kvm_run)
1051 {
1052         pr_unimpl(&svm->vcpu, "%s: task switch is unsupported\n", __FUNCTION__);
1053         kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
1054         return 0;
1055 }
1056
1057 static int cpuid_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
1058 {
1059         svm->next_rip = svm->vmcb->save.rip + 2;
1060         kvm_emulate_cpuid(&svm->vcpu);
1061         return 1;
1062 }
1063
1064 static int emulate_on_interception(struct vcpu_svm *svm,
1065                                    struct kvm_run *kvm_run)
1066 {
1067         if (emulate_instruction(&svm->vcpu, NULL, 0, 0) != EMULATE_DONE)
1068                 pr_unimpl(&svm->vcpu, "%s: failed\n", __FUNCTION__);
1069         return 1;
1070 }
1071
1072 static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data)
1073 {
1074         struct vcpu_svm *svm = to_svm(vcpu);
1075
1076         switch (ecx) {
1077         case MSR_IA32_TIME_STAMP_COUNTER: {
1078                 u64 tsc;
1079
1080                 rdtscll(tsc);
1081                 *data = svm->vmcb->control.tsc_offset + tsc;
1082                 break;
1083         }
1084         case MSR_K6_STAR:
1085                 *data = svm->vmcb->save.star;
1086                 break;
1087 #ifdef CONFIG_X86_64
1088         case MSR_LSTAR:
1089                 *data = svm->vmcb->save.lstar;
1090                 break;
1091         case MSR_CSTAR:
1092                 *data = svm->vmcb->save.cstar;
1093                 break;
1094         case MSR_KERNEL_GS_BASE:
1095                 *data = svm->vmcb->save.kernel_gs_base;
1096                 break;
1097         case MSR_SYSCALL_MASK:
1098                 *data = svm->vmcb->save.sfmask;
1099                 break;
1100 #endif
1101         case MSR_IA32_SYSENTER_CS:
1102                 *data = svm->vmcb->save.sysenter_cs;
1103                 break;
1104         case MSR_IA32_SYSENTER_EIP:
1105                 *data = svm->vmcb->save.sysenter_eip;
1106                 break;
1107         case MSR_IA32_SYSENTER_ESP:
1108                 *data = svm->vmcb->save.sysenter_esp;
1109                 break;
1110         default:
1111                 return kvm_get_msr_common(vcpu, ecx, data);
1112         }
1113         return 0;
1114 }
1115
1116 static int rdmsr_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
1117 {
1118         u32 ecx = svm->vcpu.regs[VCPU_REGS_RCX];
1119         u64 data;
1120
1121         if (svm_get_msr(&svm->vcpu, ecx, &data))
1122                 svm_inject_gp(&svm->vcpu, 0);
1123         else {
1124                 svm->vmcb->save.rax = data & 0xffffffff;
1125                 svm->vcpu.regs[VCPU_REGS_RDX] = data >> 32;
1126                 svm->next_rip = svm->vmcb->save.rip + 2;
1127                 skip_emulated_instruction(&svm->vcpu);
1128         }
1129         return 1;
1130 }
1131
1132 static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data)
1133 {
1134         struct vcpu_svm *svm = to_svm(vcpu);
1135
1136         switch (ecx) {
1137         case MSR_IA32_TIME_STAMP_COUNTER: {
1138                 u64 tsc;
1139
1140                 rdtscll(tsc);
1141                 svm->vmcb->control.tsc_offset = data - tsc;
1142                 break;
1143         }
1144         case MSR_K6_STAR:
1145                 svm->vmcb->save.star = data;
1146                 break;
1147 #ifdef CONFIG_X86_64
1148         case MSR_LSTAR:
1149                 svm->vmcb->save.lstar = data;
1150                 break;
1151         case MSR_CSTAR:
1152                 svm->vmcb->save.cstar = data;
1153                 break;
1154         case MSR_KERNEL_GS_BASE:
1155                 svm->vmcb->save.kernel_gs_base = data;
1156                 break;
1157         case MSR_SYSCALL_MASK:
1158                 svm->vmcb->save.sfmask = data;
1159                 break;
1160 #endif
1161         case MSR_IA32_SYSENTER_CS:
1162                 svm->vmcb->save.sysenter_cs = data;
1163                 break;
1164         case MSR_IA32_SYSENTER_EIP:
1165                 svm->vmcb->save.sysenter_eip = data;
1166                 break;
1167         case MSR_IA32_SYSENTER_ESP:
1168                 svm->vmcb->save.sysenter_esp = data;
1169                 break;
1170         default:
1171                 return kvm_set_msr_common(vcpu, ecx, data);
1172         }
1173         return 0;
1174 }
1175
1176 static int wrmsr_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
1177 {
1178         u32 ecx = svm->vcpu.regs[VCPU_REGS_RCX];
1179         u64 data = (svm->vmcb->save.rax & -1u)
1180                 | ((u64)(svm->vcpu.regs[VCPU_REGS_RDX] & -1u) << 32);
1181         svm->next_rip = svm->vmcb->save.rip + 2;
1182         if (svm_set_msr(&svm->vcpu, ecx, data))
1183                 svm_inject_gp(&svm->vcpu, 0);
1184         else
1185                 skip_emulated_instruction(&svm->vcpu);
1186         return 1;
1187 }
1188
1189 static int msr_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
1190 {
1191         if (svm->vmcb->control.exit_info_1)
1192                 return wrmsr_interception(svm, kvm_run);
1193         else
1194                 return rdmsr_interception(svm, kvm_run);
1195 }
1196
1197 static int interrupt_window_interception(struct vcpu_svm *svm,
1198                                    struct kvm_run *kvm_run)
1199 {
1200         svm->vmcb->control.intercept &= ~(1ULL << INTERCEPT_VINTR);
1201         svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
1202         /*
1203          * If the user space waits to inject interrupts, exit as soon as
1204          * possible
1205          */
1206         if (kvm_run->request_interrupt_window &&
1207             !svm->vcpu.irq_summary) {
1208                 ++svm->vcpu.stat.irq_window_exits;
1209                 kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
1210                 return 0;
1211         }
1212
1213         return 1;
1214 }
1215
1216 static int (*svm_exit_handlers[])(struct vcpu_svm *svm,
1217                                       struct kvm_run *kvm_run) = {
1218         [SVM_EXIT_READ_CR0]                     = emulate_on_interception,
1219         [SVM_EXIT_READ_CR3]                     = emulate_on_interception,
1220         [SVM_EXIT_READ_CR4]                     = emulate_on_interception,
1221         /* for now: */
1222         [SVM_EXIT_WRITE_CR0]                    = emulate_on_interception,
1223         [SVM_EXIT_WRITE_CR3]                    = emulate_on_interception,
1224         [SVM_EXIT_WRITE_CR4]                    = emulate_on_interception,
1225         [SVM_EXIT_READ_DR0]                     = emulate_on_interception,
1226         [SVM_EXIT_READ_DR1]                     = emulate_on_interception,
1227         [SVM_EXIT_READ_DR2]                     = emulate_on_interception,
1228         [SVM_EXIT_READ_DR3]                     = emulate_on_interception,
1229         [SVM_EXIT_WRITE_DR0]                    = emulate_on_interception,
1230         [SVM_EXIT_WRITE_DR1]                    = emulate_on_interception,
1231         [SVM_EXIT_WRITE_DR2]                    = emulate_on_interception,
1232         [SVM_EXIT_WRITE_DR3]                    = emulate_on_interception,
1233         [SVM_EXIT_WRITE_DR5]                    = emulate_on_interception,
1234         [SVM_EXIT_WRITE_DR7]                    = emulate_on_interception,
1235         [SVM_EXIT_EXCP_BASE + PF_VECTOR]        = pf_interception,
1236         [SVM_EXIT_EXCP_BASE + NM_VECTOR]        = nm_interception,
1237         [SVM_EXIT_INTR]                         = nop_on_interception,
1238         [SVM_EXIT_NMI]                          = nop_on_interception,
1239         [SVM_EXIT_SMI]                          = nop_on_interception,
1240         [SVM_EXIT_INIT]                         = nop_on_interception,
1241         [SVM_EXIT_VINTR]                        = interrupt_window_interception,
1242         /* [SVM_EXIT_CR0_SEL_WRITE]             = emulate_on_interception, */
1243         [SVM_EXIT_CPUID]                        = cpuid_interception,
1244         [SVM_EXIT_HLT]                          = halt_interception,
1245         [SVM_EXIT_INVLPG]                       = emulate_on_interception,
1246         [SVM_EXIT_INVLPGA]                      = invalid_op_interception,
1247         [SVM_EXIT_IOIO]                         = io_interception,
1248         [SVM_EXIT_MSR]                          = msr_interception,
1249         [SVM_EXIT_TASK_SWITCH]                  = task_switch_interception,
1250         [SVM_EXIT_SHUTDOWN]                     = shutdown_interception,
1251         [SVM_EXIT_VMRUN]                        = invalid_op_interception,
1252         [SVM_EXIT_VMMCALL]                      = vmmcall_interception,
1253         [SVM_EXIT_VMLOAD]                       = invalid_op_interception,
1254         [SVM_EXIT_VMSAVE]                       = invalid_op_interception,
1255         [SVM_EXIT_STGI]                         = invalid_op_interception,
1256         [SVM_EXIT_CLGI]                         = invalid_op_interception,
1257         [SVM_EXIT_SKINIT]                       = invalid_op_interception,
1258         [SVM_EXIT_MONITOR]                      = invalid_op_interception,
1259         [SVM_EXIT_MWAIT]                        = invalid_op_interception,
1260 };
1261
1262
1263 static int handle_exit(struct vcpu_svm *svm, struct kvm_run *kvm_run)
1264 {
1265         u32 exit_code = svm->vmcb->control.exit_code;
1266
1267         if (is_external_interrupt(svm->vmcb->control.exit_int_info) &&
1268             exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR)
1269                 printk(KERN_ERR "%s: unexpected exit_ini_info 0x%x "
1270                        "exit_code 0x%x\n",
1271                        __FUNCTION__, svm->vmcb->control.exit_int_info,
1272                        exit_code);
1273
1274         if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
1275             || svm_exit_handlers[exit_code] == 0) {
1276                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
1277                 kvm_run->hw.hardware_exit_reason = exit_code;
1278                 return 0;
1279         }
1280
1281         return svm_exit_handlers[exit_code](svm, kvm_run);
1282 }
1283
1284 static void reload_tss(struct kvm_vcpu *vcpu)
1285 {
1286         int cpu = raw_smp_processor_id();
1287
1288         struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
1289         svm_data->tss_desc->type = 9; //available 32/64-bit TSS
1290         load_TR_desc();
1291 }
1292
1293 static void pre_svm_run(struct vcpu_svm *svm)
1294 {
1295         int cpu = raw_smp_processor_id();
1296
1297         struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
1298
1299         svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
1300         if (svm->vcpu.cpu != cpu ||
1301             svm->asid_generation != svm_data->asid_generation)
1302                 new_asid(svm, svm_data);
1303 }
1304
1305
1306 static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
1307 {
1308         struct vmcb_control_area *control;
1309
1310         control = &svm->vmcb->control;
1311         control->int_vector = irq;
1312         control->int_ctl &= ~V_INTR_PRIO_MASK;
1313         control->int_ctl |= V_IRQ_MASK |
1314                 ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
1315 }
1316
1317 static void svm_set_irq(struct kvm_vcpu *vcpu, int irq)
1318 {
1319         struct vcpu_svm *svm = to_svm(vcpu);
1320
1321         svm_inject_irq(svm, irq);
1322 }
1323
1324 static void svm_intr_assist(struct vcpu_svm *svm)
1325 {
1326         struct vmcb *vmcb = svm->vmcb;
1327         int intr_vector = -1;
1328         struct kvm_vcpu *vcpu = &svm->vcpu;
1329
1330         kvm_inject_pending_timer_irqs(vcpu);
1331         if ((vmcb->control.exit_int_info & SVM_EVTINJ_VALID) &&
1332             ((vmcb->control.exit_int_info & SVM_EVTINJ_TYPE_MASK) == 0)) {
1333                 intr_vector = vmcb->control.exit_int_info &
1334                               SVM_EVTINJ_VEC_MASK;
1335                 vmcb->control.exit_int_info = 0;
1336                 svm_inject_irq(svm, intr_vector);
1337                 return;
1338         }
1339
1340         if (vmcb->control.int_ctl & V_IRQ_MASK)
1341                 return;
1342
1343         if (!kvm_cpu_has_interrupt(vcpu))
1344                 return;
1345
1346         if (!(vmcb->save.rflags & X86_EFLAGS_IF) ||
1347             (vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) ||
1348             (vmcb->control.event_inj & SVM_EVTINJ_VALID)) {
1349                 /* unable to deliver irq, set pending irq */
1350                 vmcb->control.intercept |= (1ULL << INTERCEPT_VINTR);
1351                 svm_inject_irq(svm, 0x0);
1352                 return;
1353         }
1354         /* Okay, we can deliver the interrupt: grab it and update PIC state. */
1355         intr_vector = kvm_cpu_get_interrupt(vcpu);
1356         svm_inject_irq(svm, intr_vector);
1357         kvm_timer_intr_post(vcpu, intr_vector);
1358 }
1359
1360 static void kvm_reput_irq(struct vcpu_svm *svm)
1361 {
1362         struct vmcb_control_area *control = &svm->vmcb->control;
1363
1364         if ((control->int_ctl & V_IRQ_MASK)
1365             && !irqchip_in_kernel(svm->vcpu.kvm)) {
1366                 control->int_ctl &= ~V_IRQ_MASK;
1367                 push_irq(&svm->vcpu, control->int_vector);
1368         }
1369
1370         svm->vcpu.interrupt_window_open =
1371                 !(control->int_state & SVM_INTERRUPT_SHADOW_MASK);
1372 }
1373
1374 static void svm_do_inject_vector(struct vcpu_svm *svm)
1375 {
1376         struct kvm_vcpu *vcpu = &svm->vcpu;
1377         int word_index = __ffs(vcpu->irq_summary);
1378         int bit_index = __ffs(vcpu->irq_pending[word_index]);
1379         int irq = word_index * BITS_PER_LONG + bit_index;
1380
1381         clear_bit(bit_index, &vcpu->irq_pending[word_index]);
1382         if (!vcpu->irq_pending[word_index])
1383                 clear_bit(word_index, &vcpu->irq_summary);
1384         svm_inject_irq(svm, irq);
1385 }
1386
1387 static void do_interrupt_requests(struct vcpu_svm *svm,
1388                                        struct kvm_run *kvm_run)
1389 {
1390         struct vmcb_control_area *control = &svm->vmcb->control;
1391
1392         svm->vcpu.interrupt_window_open =
1393                 (!(control->int_state & SVM_INTERRUPT_SHADOW_MASK) &&
1394                  (svm->vmcb->save.rflags & X86_EFLAGS_IF));
1395
1396         if (svm->vcpu.interrupt_window_open && svm->vcpu.irq_summary)
1397                 /*
1398                  * If interrupts enabled, and not blocked by sti or mov ss. Good.
1399                  */
1400                 svm_do_inject_vector(svm);
1401
1402         /*
1403          * Interrupts blocked.  Wait for unblock.
1404          */
1405         if (!svm->vcpu.interrupt_window_open &&
1406             (svm->vcpu.irq_summary || kvm_run->request_interrupt_window)) {
1407                 control->intercept |= 1ULL << INTERCEPT_VINTR;
1408         } else
1409                 control->intercept &= ~(1ULL << INTERCEPT_VINTR);
1410 }
1411
1412 static void post_kvm_run_save(struct vcpu_svm *svm,
1413                               struct kvm_run *kvm_run)
1414 {
1415         if (irqchip_in_kernel(svm->vcpu.kvm))
1416                 kvm_run->ready_for_interrupt_injection = 1;
1417         else
1418                 kvm_run->ready_for_interrupt_injection =
1419                                          (svm->vcpu.interrupt_window_open &&
1420                                           svm->vcpu.irq_summary == 0);
1421         kvm_run->if_flag = (svm->vmcb->save.rflags & X86_EFLAGS_IF) != 0;
1422         kvm_run->cr8 = get_cr8(&svm->vcpu);
1423         kvm_run->apic_base = kvm_get_apic_base(&svm->vcpu);
1424 }
1425
1426 /*
1427  * Check if userspace requested an interrupt window, and that the
1428  * interrupt window is open.
1429  *
1430  * No need to exit to userspace if we already have an interrupt queued.
1431  */
1432 static int dm_request_for_irq_injection(struct vcpu_svm *svm,
1433                                           struct kvm_run *kvm_run)
1434 {
1435         return (!svm->vcpu.irq_summary &&
1436                 kvm_run->request_interrupt_window &&
1437                 svm->vcpu.interrupt_window_open &&
1438                 (svm->vmcb->save.rflags & X86_EFLAGS_IF));
1439 }
1440
1441 static void save_db_regs(unsigned long *db_regs)
1442 {
1443         asm volatile ("mov %%dr0, %0" : "=r"(db_regs[0]));
1444         asm volatile ("mov %%dr1, %0" : "=r"(db_regs[1]));
1445         asm volatile ("mov %%dr2, %0" : "=r"(db_regs[2]));
1446         asm volatile ("mov %%dr3, %0" : "=r"(db_regs[3]));
1447 }
1448
1449 static void load_db_regs(unsigned long *db_regs)
1450 {
1451         asm volatile ("mov %0, %%dr0" : : "r"(db_regs[0]));
1452         asm volatile ("mov %0, %%dr1" : : "r"(db_regs[1]));
1453         asm volatile ("mov %0, %%dr2" : : "r"(db_regs[2]));
1454         asm volatile ("mov %0, %%dr3" : : "r"(db_regs[3]));
1455 }
1456
1457 static void svm_flush_tlb(struct kvm_vcpu *vcpu)
1458 {
1459         force_new_asid(vcpu);
1460 }
1461
1462 static int svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1463 {
1464         struct vcpu_svm *svm = to_svm(vcpu);
1465         u16 fs_selector;
1466         u16 gs_selector;
1467         u16 ldt_selector;
1468         int r;
1469
1470 again:
1471         r = kvm_mmu_reload(vcpu);
1472         if (unlikely(r))
1473                 return r;
1474
1475         clgi();
1476
1477         if (signal_pending(current)) {
1478                 stgi();
1479                 ++vcpu->stat.signal_exits;
1480                 post_kvm_run_save(svm, kvm_run);
1481                 kvm_run->exit_reason = KVM_EXIT_INTR;
1482                 return -EINTR;
1483         }
1484
1485         if (irqchip_in_kernel(vcpu->kvm))
1486                 svm_intr_assist(svm);
1487         else if (!vcpu->mmio_read_completed)
1488                 do_interrupt_requests(svm, kvm_run);
1489
1490         vcpu->guest_mode = 1;
1491         if (vcpu->requests)
1492                 if (test_and_clear_bit(KVM_TLB_FLUSH, &vcpu->requests))
1493                     svm_flush_tlb(vcpu);
1494
1495         pre_svm_run(svm);
1496
1497         save_host_msrs(vcpu);
1498         fs_selector = read_fs();
1499         gs_selector = read_gs();
1500         ldt_selector = read_ldt();
1501         svm->host_cr2 = kvm_read_cr2();
1502         svm->host_dr6 = read_dr6();
1503         svm->host_dr7 = read_dr7();
1504         svm->vmcb->save.cr2 = vcpu->cr2;
1505
1506         if (svm->vmcb->save.dr7 & 0xff) {
1507                 write_dr7(0);
1508                 save_db_regs(svm->host_db_regs);
1509                 load_db_regs(svm->db_regs);
1510         }
1511
1512         if (vcpu->fpu_active) {
1513                 fx_save(&vcpu->host_fx_image);
1514                 fx_restore(&vcpu->guest_fx_image);
1515         }
1516
1517         asm volatile (
1518 #ifdef CONFIG_X86_64
1519                 "push %%rbx; push %%rcx; push %%rdx;"
1520                 "push %%rsi; push %%rdi; push %%rbp;"
1521                 "push %%r8;  push %%r9;  push %%r10; push %%r11;"
1522                 "push %%r12; push %%r13; push %%r14; push %%r15;"
1523 #else
1524                 "push %%ebx; push %%ecx; push %%edx;"
1525                 "push %%esi; push %%edi; push %%ebp;"
1526 #endif
1527
1528 #ifdef CONFIG_X86_64
1529                 "mov %c[rbx](%[svm]), %%rbx \n\t"
1530                 "mov %c[rcx](%[svm]), %%rcx \n\t"
1531                 "mov %c[rdx](%[svm]), %%rdx \n\t"
1532                 "mov %c[rsi](%[svm]), %%rsi \n\t"
1533                 "mov %c[rdi](%[svm]), %%rdi \n\t"
1534                 "mov %c[rbp](%[svm]), %%rbp \n\t"
1535                 "mov %c[r8](%[svm]),  %%r8  \n\t"
1536                 "mov %c[r9](%[svm]),  %%r9  \n\t"
1537                 "mov %c[r10](%[svm]), %%r10 \n\t"
1538                 "mov %c[r11](%[svm]), %%r11 \n\t"
1539                 "mov %c[r12](%[svm]), %%r12 \n\t"
1540                 "mov %c[r13](%[svm]), %%r13 \n\t"
1541                 "mov %c[r14](%[svm]), %%r14 \n\t"
1542                 "mov %c[r15](%[svm]), %%r15 \n\t"
1543 #else
1544                 "mov %c[rbx](%[svm]), %%ebx \n\t"
1545                 "mov %c[rcx](%[svm]), %%ecx \n\t"
1546                 "mov %c[rdx](%[svm]), %%edx \n\t"
1547                 "mov %c[rsi](%[svm]), %%esi \n\t"
1548                 "mov %c[rdi](%[svm]), %%edi \n\t"
1549                 "mov %c[rbp](%[svm]), %%ebp \n\t"
1550 #endif
1551
1552 #ifdef CONFIG_X86_64
1553                 /* Enter guest mode */
1554                 "push %%rax \n\t"
1555                 "mov %c[vmcb](%[svm]), %%rax \n\t"
1556                 SVM_VMLOAD "\n\t"
1557                 SVM_VMRUN "\n\t"
1558                 SVM_VMSAVE "\n\t"
1559                 "pop %%rax \n\t"
1560 #else
1561                 /* Enter guest mode */
1562                 "push %%eax \n\t"
1563                 "mov %c[vmcb](%[svm]), %%eax \n\t"
1564                 SVM_VMLOAD "\n\t"
1565                 SVM_VMRUN "\n\t"
1566                 SVM_VMSAVE "\n\t"
1567                 "pop %%eax \n\t"
1568 #endif
1569
1570                 /* Save guest registers, load host registers */
1571 #ifdef CONFIG_X86_64
1572                 "mov %%rbx, %c[rbx](%[svm]) \n\t"
1573                 "mov %%rcx, %c[rcx](%[svm]) \n\t"
1574                 "mov %%rdx, %c[rdx](%[svm]) \n\t"
1575                 "mov %%rsi, %c[rsi](%[svm]) \n\t"
1576                 "mov %%rdi, %c[rdi](%[svm]) \n\t"
1577                 "mov %%rbp, %c[rbp](%[svm]) \n\t"
1578                 "mov %%r8,  %c[r8](%[svm]) \n\t"
1579                 "mov %%r9,  %c[r9](%[svm]) \n\t"
1580                 "mov %%r10, %c[r10](%[svm]) \n\t"
1581                 "mov %%r11, %c[r11](%[svm]) \n\t"
1582                 "mov %%r12, %c[r12](%[svm]) \n\t"
1583                 "mov %%r13, %c[r13](%[svm]) \n\t"
1584                 "mov %%r14, %c[r14](%[svm]) \n\t"
1585                 "mov %%r15, %c[r15](%[svm]) \n\t"
1586
1587                 "pop  %%r15; pop  %%r14; pop  %%r13; pop  %%r12;"
1588                 "pop  %%r11; pop  %%r10; pop  %%r9;  pop  %%r8;"
1589                 "pop  %%rbp; pop  %%rdi; pop  %%rsi;"
1590                 "pop  %%rdx; pop  %%rcx; pop  %%rbx; \n\t"
1591 #else
1592                 "mov %%ebx, %c[rbx](%[svm]) \n\t"
1593                 "mov %%ecx, %c[rcx](%[svm]) \n\t"
1594                 "mov %%edx, %c[rdx](%[svm]) \n\t"
1595                 "mov %%esi, %c[rsi](%[svm]) \n\t"
1596                 "mov %%edi, %c[rdi](%[svm]) \n\t"
1597                 "mov %%ebp, %c[rbp](%[svm]) \n\t"
1598
1599                 "pop  %%ebp; pop  %%edi; pop  %%esi;"
1600                 "pop  %%edx; pop  %%ecx; pop  %%ebx; \n\t"
1601 #endif
1602                 :
1603                 : [svm]"a"(svm),
1604                   [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
1605                   [rbx]"i"(offsetof(struct vcpu_svm,vcpu.regs[VCPU_REGS_RBX])),
1606                   [rcx]"i"(offsetof(struct vcpu_svm,vcpu.regs[VCPU_REGS_RCX])),
1607                   [rdx]"i"(offsetof(struct vcpu_svm,vcpu.regs[VCPU_REGS_RDX])),
1608                   [rsi]"i"(offsetof(struct vcpu_svm,vcpu.regs[VCPU_REGS_RSI])),
1609                   [rdi]"i"(offsetof(struct vcpu_svm,vcpu.regs[VCPU_REGS_RDI])),
1610                   [rbp]"i"(offsetof(struct vcpu_svm,vcpu.regs[VCPU_REGS_RBP]))
1611 #ifdef CONFIG_X86_64
1612                   ,[r8 ]"i"(offsetof(struct vcpu_svm,vcpu.regs[VCPU_REGS_R8])),
1613                   [r9 ]"i"(offsetof(struct vcpu_svm,vcpu.regs[VCPU_REGS_R9 ])),
1614                   [r10]"i"(offsetof(struct vcpu_svm,vcpu.regs[VCPU_REGS_R10])),
1615                   [r11]"i"(offsetof(struct vcpu_svm,vcpu.regs[VCPU_REGS_R11])),
1616                   [r12]"i"(offsetof(struct vcpu_svm,vcpu.regs[VCPU_REGS_R12])),
1617                   [r13]"i"(offsetof(struct vcpu_svm,vcpu.regs[VCPU_REGS_R13])),
1618                   [r14]"i"(offsetof(struct vcpu_svm,vcpu.regs[VCPU_REGS_R14])),
1619                   [r15]"i"(offsetof(struct vcpu_svm,vcpu.regs[VCPU_REGS_R15]))
1620 #endif
1621                 : "cc", "memory" );
1622
1623         vcpu->guest_mode = 0;
1624
1625         if (vcpu->fpu_active) {
1626                 fx_save(&vcpu->guest_fx_image);
1627                 fx_restore(&vcpu->host_fx_image);
1628         }
1629
1630         if ((svm->vmcb->save.dr7 & 0xff))
1631                 load_db_regs(svm->host_db_regs);
1632
1633         vcpu->cr2 = svm->vmcb->save.cr2;
1634
1635         write_dr6(svm->host_dr6);
1636         write_dr7(svm->host_dr7);
1637         kvm_write_cr2(svm->host_cr2);
1638
1639         load_fs(fs_selector);
1640         load_gs(gs_selector);
1641         load_ldt(ldt_selector);
1642         load_host_msrs(vcpu);
1643
1644         reload_tss(vcpu);
1645
1646         /*
1647          * Profile KVM exit RIPs:
1648          */
1649         if (unlikely(prof_on == KVM_PROFILING))
1650                 profile_hit(KVM_PROFILING,
1651                         (void *)(unsigned long)svm->vmcb->save.rip);
1652
1653         stgi();
1654
1655         kvm_reput_irq(svm);
1656
1657         svm->next_rip = 0;
1658
1659         if (svm->vmcb->control.exit_code == SVM_EXIT_ERR) {
1660                 kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
1661                 kvm_run->fail_entry.hardware_entry_failure_reason
1662                         = svm->vmcb->control.exit_code;
1663                 post_kvm_run_save(svm, kvm_run);
1664                 return 0;
1665         }
1666
1667         r = handle_exit(svm, kvm_run);
1668         if (r > 0) {
1669                 if (dm_request_for_irq_injection(svm, kvm_run)) {
1670                         ++vcpu->stat.request_irq_exits;
1671                         post_kvm_run_save(svm, kvm_run);
1672                         kvm_run->exit_reason = KVM_EXIT_INTR;
1673                         return -EINTR;
1674                 }
1675                 kvm_resched(vcpu);
1676                 goto again;
1677         }
1678         post_kvm_run_save(svm, kvm_run);
1679         return r;
1680 }
1681
1682 static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
1683 {
1684         struct vcpu_svm *svm = to_svm(vcpu);
1685
1686         svm->vmcb->save.cr3 = root;
1687         force_new_asid(vcpu);
1688
1689         if (vcpu->fpu_active) {
1690                 svm->vmcb->control.intercept_exceptions |= (1 << NM_VECTOR);
1691                 svm->vmcb->save.cr0 |= X86_CR0_TS;
1692                 vcpu->fpu_active = 0;
1693         }
1694 }
1695
1696 static void svm_inject_page_fault(struct kvm_vcpu *vcpu,
1697                                   unsigned long  addr,
1698                                   uint32_t err_code)
1699 {
1700         struct vcpu_svm *svm = to_svm(vcpu);
1701         uint32_t exit_int_info = svm->vmcb->control.exit_int_info;
1702
1703         ++vcpu->stat.pf_guest;
1704
1705         if (is_page_fault(exit_int_info)) {
1706
1707                 svm->vmcb->control.event_inj_err = 0;
1708                 svm->vmcb->control.event_inj =  SVM_EVTINJ_VALID |
1709                                                 SVM_EVTINJ_VALID_ERR |
1710                                                 SVM_EVTINJ_TYPE_EXEPT |
1711                                                 DF_VECTOR;
1712                 return;
1713         }
1714         vcpu->cr2 = addr;
1715         svm->vmcb->save.cr2 = addr;
1716         svm->vmcb->control.event_inj =  SVM_EVTINJ_VALID |
1717                                         SVM_EVTINJ_VALID_ERR |
1718                                         SVM_EVTINJ_TYPE_EXEPT |
1719                                         PF_VECTOR;
1720         svm->vmcb->control.event_inj_err = err_code;
1721 }
1722
1723
1724 static int is_disabled(void)
1725 {
1726         u64 vm_cr;
1727
1728         rdmsrl(MSR_VM_CR, vm_cr);
1729         if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE))
1730                 return 1;
1731
1732         return 0;
1733 }
1734
1735 static void
1736 svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
1737 {
1738         /*
1739          * Patch in the VMMCALL instruction:
1740          */
1741         hypercall[0] = 0x0f;
1742         hypercall[1] = 0x01;
1743         hypercall[2] = 0xd9;
1744         hypercall[3] = 0xc3;
1745 }
1746
1747 static void svm_check_processor_compat(void *rtn)
1748 {
1749         *(int *)rtn = 0;
1750 }
1751
1752 static struct kvm_arch_ops svm_arch_ops = {
1753         .cpu_has_kvm_support = has_svm,
1754         .disabled_by_bios = is_disabled,
1755         .hardware_setup = svm_hardware_setup,
1756         .hardware_unsetup = svm_hardware_unsetup,
1757         .check_processor_compatibility = svm_check_processor_compat,
1758         .hardware_enable = svm_hardware_enable,
1759         .hardware_disable = svm_hardware_disable,
1760
1761         .vcpu_create = svm_create_vcpu,
1762         .vcpu_free = svm_free_vcpu,
1763
1764         .vcpu_load = svm_vcpu_load,
1765         .vcpu_put = svm_vcpu_put,
1766         .vcpu_decache = svm_vcpu_decache,
1767
1768         .set_guest_debug = svm_guest_debug,
1769         .get_msr = svm_get_msr,
1770         .set_msr = svm_set_msr,
1771         .get_segment_base = svm_get_segment_base,
1772         .get_segment = svm_get_segment,
1773         .set_segment = svm_set_segment,
1774         .get_cs_db_l_bits = svm_get_cs_db_l_bits,
1775         .decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
1776         .set_cr0 = svm_set_cr0,
1777         .set_cr3 = svm_set_cr3,
1778         .set_cr4 = svm_set_cr4,
1779         .set_efer = svm_set_efer,
1780         .get_idt = svm_get_idt,
1781         .set_idt = svm_set_idt,
1782         .get_gdt = svm_get_gdt,
1783         .set_gdt = svm_set_gdt,
1784         .get_dr = svm_get_dr,
1785         .set_dr = svm_set_dr,
1786         .cache_regs = svm_cache_regs,
1787         .decache_regs = svm_decache_regs,
1788         .get_rflags = svm_get_rflags,
1789         .set_rflags = svm_set_rflags,
1790
1791         .tlb_flush = svm_flush_tlb,
1792         .inject_page_fault = svm_inject_page_fault,
1793
1794         .inject_gp = svm_inject_gp,
1795
1796         .run = svm_vcpu_run,
1797         .skip_emulated_instruction = skip_emulated_instruction,
1798         .patch_hypercall = svm_patch_hypercall,
1799         .get_irq = svm_get_irq,
1800         .set_irq = svm_set_irq,
1801 };
1802
1803 static int __init svm_init(void)
1804 {
1805         return kvm_init_arch(&svm_arch_ops, sizeof(struct vcpu_svm),
1806                               THIS_MODULE);
1807 }
1808
1809 static void __exit svm_exit(void)
1810 {
1811         kvm_exit_arch();
1812 }
1813
1814 module_init(svm_init)
1815 module_exit(svm_exit)