drivers/kvm/svm.c

   1 /*
   2  * Kernel-based Virtual Machine driver for Linux
   3  *
   4  * AMD SVM support
   5  *
   6  * Copyright (C) 2006 Qumranet, Inc.
   7  *
   8  * Authors:
   9  *   Yaniv Kamay  <yaniv@qumranet.com>
  10  *   Avi Kivity   <avi@qumranet.com>
  11  *
  12  * This work is licensed under the terms of the GNU GPL, version 2.  See
  13  * the COPYING file in the top-level directory.
  14  *
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/kernel.h>
  19 #include <linux/vmalloc.h>
  20 #include <linux/highmem.h>
  21 #include <linux/profile.h>
  22 #include <linux/sched.h>
  23 #include <asm/desc.h>
  24
  25 #include "kvm_svm.h"
  26 #include "x86_emulate.h"
  27
  28 MODULE_AUTHOR("Qumranet");
  29 MODULE_LICENSE("GPL");
  30
  31 #define IOPM_ALLOC_ORDER 2
  32 #define MSRPM_ALLOC_ORDER 1
  33
  34 #define DB_VECTOR 1
  35 #define UD_VECTOR 6
  36 #define GP_VECTOR 13
  37
  38 #define DR7_GD_MASK (1 << 13)
  39 #define DR6_BD_MASK (1 << 13)
  40 #define CR4_DE_MASK (1UL << 3)
  41
  42 #define SEG_TYPE_LDT 2
  43 #define SEG_TYPE_BUSY_TSS16 3
  44
  45 #define KVM_EFER_LMA (1 << 10)
  46 #define KVM_EFER_LME (1 << 8)
  47
  48 #define SVM_FEATURE_NPT  (1 << 0)
  49 #define SVM_FEATURE_LBRV (1 << 1)
  50 #define SVM_DEATURE_SVML (1 << 2)
  51
  52 unsigned long iopm_base;
  53 unsigned long msrpm_base;
  54
  55 struct kvm_ldttss_desc {
  56         u16 limit0;
  57         u16 base0;
  58         unsigned base1 : 8, type : 5, dpl : 2, p : 1;
  59         unsigned limit1 : 4, zero0 : 3, g : 1, base2 : 8;
  60         u32 base3;
  61         u32 zero1;
  62 } __attribute__((packed));
  63
  64 struct svm_cpu_data {
  65         int cpu;
  66
  67         u64 asid_generation;
  68         u32 max_asid;
  69         u32 next_asid;
  70         struct kvm_ldttss_desc *tss_desc;
  71
  72         struct page *save_area;
  73 };
  74
  75 static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);
  76 static uint32_t svm_features;
  77
  78 struct svm_init_data {
  79         int cpu;
  80         int r;
  81 };
  82
  83 static u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
  84
  85 #define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges)
  86 #define MSRS_RANGE_SIZE 2048
  87 #define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)
  88
  89 #define MAX_INST_SIZE 15
  90
  91 static inline u32 svm_has(u32 feat)
  92 {
  93         return svm_features & feat;
  94 }
  95
  96 static unsigned get_addr_size(struct kvm_vcpu *vcpu)
  97 {
  98         struct vmcb_save_area *sa = &vcpu->svm->vmcb->save;
  99         u16 cs_attrib;
 100
 101         if (!(sa->cr0 & CR0_PE_MASK) || (sa->rflags & X86_EFLAGS_VM))
 102                 return 2;
 103
 104         cs_attrib = sa->cs.attrib;
 105
 106         return (cs_attrib & SVM_SELECTOR_L_MASK) ? 8 :
 107                                 (cs_attrib & SVM_SELECTOR_DB_MASK) ? 4 : 2;
 108 }
 109
 110 static inline u8 pop_irq(struct kvm_vcpu *vcpu)
 111 {
 112         int word_index = __ffs(vcpu->irq_summary);
 113         int bit_index = __ffs(vcpu->irq_pending[word_index]);
 114         int irq = word_index * BITS_PER_LONG + bit_index;
 115
 116         clear_bit(bit_index, &vcpu->irq_pending[word_index]);
 117         if (!vcpu->irq_pending[word_index])
 118                 clear_bit(word_index, &vcpu->irq_summary);
 119         return irq;
 120 }
 121
 122 static inline void push_irq(struct kvm_vcpu *vcpu, u8 irq)
 123 {
 124         set_bit(irq, vcpu->irq_pending);
 125         set_bit(irq / BITS_PER_LONG, &vcpu->irq_summary);
 126 }
 127
 128 static inline void clgi(void)
 129 {
 130         asm volatile (SVM_CLGI);
 131 }
 132
 133 static inline void stgi(void)
 134 {
 135         asm volatile (SVM_STGI);
 136 }
 137
 138 static inline void invlpga(unsigned long addr, u32 asid)
 139 {
 140         asm volatile (SVM_INVLPGA :: "a"(addr), "c"(asid));
 141 }
 142
 143 static inline unsigned long kvm_read_cr2(void)
 144 {
 145         unsigned long cr2;
 146
 147         asm volatile ("mov %%cr2, %0" : "=r" (cr2));
 148         return cr2;
 149 }
 150
 151 static inline void kvm_write_cr2(unsigned long val)
 152 {
 153         asm volatile ("mov %0, %%cr2" :: "r" (val));
 154 }
 155
 156 static inline unsigned long read_dr6(void)
 157 {
 158         unsigned long dr6;
 159
 160         asm volatile ("mov %%dr6, %0" : "=r" (dr6));
 161         return dr6;
 162 }
 163
 164 static inline void write_dr6(unsigned long val)
 165 {
 166         asm volatile ("mov %0, %%dr6" :: "r" (val));
 167 }
 168
 169 static inline unsigned long read_dr7(void)
 170 {
 171         unsigned long dr7;
 172
 173         asm volatile ("mov %%dr7, %0" : "=r" (dr7));
 174         return dr7;
 175 }
 176
 177 static inline void write_dr7(unsigned long val)
 178 {
 179         asm volatile ("mov %0, %%dr7" :: "r" (val));
 180 }
 181
 182 static inline void force_new_asid(struct kvm_vcpu *vcpu)
 183 {
 184         vcpu->svm->asid_generation--;
 185 }
 186
 187 static inline void flush_guest_tlb(struct kvm_vcpu *vcpu)
 188 {
 189         force_new_asid(vcpu);
 190 }
 191
 192 static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
 193 {
 194         if (!(efer & KVM_EFER_LMA))
 195                 efer &= ~KVM_EFER_LME;
 196
 197         vcpu->svm->vmcb->save.efer = efer | MSR_EFER_SVME_MASK;
 198         vcpu->shadow_efer = efer;
 199 }
 200
 201 static void svm_inject_gp(struct kvm_vcpu *vcpu, unsigned error_code)
 202 {
 203         vcpu->svm->vmcb->control.event_inj =    SVM_EVTINJ_VALID |
 204                                                 SVM_EVTINJ_VALID_ERR |
 205                                                 SVM_EVTINJ_TYPE_EXEPT |
 206                                                 GP_VECTOR;
 207         vcpu->svm->vmcb->control.event_inj_err = error_code;
 208 }
 209
 210 static void inject_ud(struct kvm_vcpu *vcpu)
 211 {
 212         vcpu->svm->vmcb->control.event_inj =    SVM_EVTINJ_VALID |
 213                                                 SVM_EVTINJ_TYPE_EXEPT |
 214                                                 UD_VECTOR;
 215 }
 216
 217 static int is_page_fault(uint32_t info)
 218 {
 219         info &= SVM_EVTINJ_VEC_MASK | SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
 220         return info == (PF_VECTOR | SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_EXEPT);
 221 }
 222
 223 static int is_external_interrupt(u32 info)
 224 {
 225         info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
 226         return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR);
 227 }
 228
 229 static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
 230 {
 231         if (!vcpu->svm->next_rip) {
 232                 printk(KERN_DEBUG "%s: NOP\n", __FUNCTION__);
 233                 return;
 234         }
 235         if (vcpu->svm->next_rip - vcpu->svm->vmcb->save.rip > 15) {
 236                 printk(KERN_ERR "%s: ip 0x%llx next 0x%llx\n",
 237                        __FUNCTION__,
 238                        vcpu->svm->vmcb->save.rip,
 239                        vcpu->svm->next_rip);
 240         }
 241
 242         vcpu->rip = vcpu->svm->vmcb->save.rip = vcpu->svm->next_rip;
 243         vcpu->svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK;
 244
 245         vcpu->interrupt_window_open = 1;
 246 }
 247
 248 static int has_svm(void)
 249 {
 250         uint32_t eax, ebx, ecx, edx;
 251
 252         if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD) {
 253                 printk(KERN_INFO "has_svm: not amd\n");
 254                 return 0;
 255         }
 256
 257         cpuid(0x80000000, &eax, &ebx, &ecx, &edx);
 258         if (eax < SVM_CPUID_FUNC) {
 259                 printk(KERN_INFO "has_svm: can't execute cpuid_8000000a\n");
 260                 return 0;
 261         }
 262
 263         cpuid(0x80000001, &eax, &ebx, &ecx, &edx);
 264         if (!(ecx & (1 << SVM_CPUID_FEATURE_SHIFT))) {
 265                 printk(KERN_DEBUG "has_svm: svm not available\n");
 266                 return 0;
 267         }
 268         return 1;
 269 }
 270
 271 static void svm_hardware_disable(void *garbage)
 272 {
 273         struct svm_cpu_data *svm_data
 274                 = per_cpu(svm_data, raw_smp_processor_id());
 275
 276         if (svm_data) {
 277                 uint64_t efer;
 278
 279                 wrmsrl(MSR_VM_HSAVE_PA, 0);
 280                 rdmsrl(MSR_EFER, efer);
 281                 wrmsrl(MSR_EFER, efer & ~MSR_EFER_SVME_MASK);
 282                 per_cpu(svm_data, raw_smp_processor_id()) = NULL;
 283                 __free_page(svm_data->save_area);
 284                 kfree(svm_data);
 285         }
 286 }
 287
 288 static void svm_hardware_enable(void *garbage)
 289 {
 290
 291         struct svm_cpu_data *svm_data;
 292         uint64_t efer;
 293 #ifdef CONFIG_X86_64
 294         struct desc_ptr gdt_descr;
 295 #else
 296         struct Xgt_desc_struct gdt_descr;
 297 #endif
 298         struct desc_struct *gdt;
 299         int me = raw_smp_processor_id();
 300
 301         if (!has_svm()) {
 302                 printk(KERN_ERR "svm_cpu_init: err EOPNOTSUPP on %d\n", me);
 303                 return;
 304         }
 305         svm_data = per_cpu(svm_data, me);
 306
 307         if (!svm_data) {
 308                 printk(KERN_ERR "svm_cpu_init: svm_data is NULL on %d\n",
 309                        me);
 310                 return;
 311         }
 312
 313         svm_data->asid_generation = 1;
 314         svm_data->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
 315         svm_data->next_asid = svm_data->max_asid + 1;
 316         svm_features = cpuid_edx(SVM_CPUID_FUNC);
 317
 318         asm volatile ( "sgdt %0" : "=m"(gdt_descr) );
 319         gdt = (struct desc_struct *)gdt_descr.address;
 320         svm_data->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
 321
 322         rdmsrl(MSR_EFER, efer);
 323         wrmsrl(MSR_EFER, efer | MSR_EFER_SVME_MASK);
 324
 325         wrmsrl(MSR_VM_HSAVE_PA,
 326                page_to_pfn(svm_data->save_area) << PAGE_SHIFT);
 327 }
 328
 329 static int svm_cpu_init(int cpu)
 330 {
 331         struct svm_cpu_data *svm_data;
 332         int r;
 333
 334         svm_data = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
 335         if (!svm_data)
 336                 return -ENOMEM;
 337         svm_data->cpu = cpu;
 338         svm_data->save_area = alloc_page(GFP_KERNEL);
 339         r = -ENOMEM;
 340         if (!svm_data->save_area)
 341                 goto err_1;
 342
 343         per_cpu(svm_data, cpu) = svm_data;
 344
 345         return 0;
 346
 347 err_1:
 348         kfree(svm_data);
 349         return r;
 350
 351 }
 352
 353 static int set_msr_interception(u32 *msrpm, unsigned msr,
 354                                 int read, int write)
 355 {
 356         int i;
 357
 358         for (i = 0; i < NUM_MSR_MAPS; i++) {
 359                 if (msr >= msrpm_ranges[i] &&
 360                     msr < msrpm_ranges[i] + MSRS_IN_RANGE) {
 361                         u32 msr_offset = (i * MSRS_IN_RANGE + msr -
 362                                           msrpm_ranges[i]) * 2;
 363
 364                         u32 *base = msrpm + (msr_offset / 32);
 365                         u32 msr_shift = msr_offset % 32;
 366                         u32 mask = ((write) ? 0 : 2) | ((read) ? 0 : 1);
 367                         *base = (*base & ~(0x3 << msr_shift)) |
 368                                 (mask << msr_shift);
 369                         return 1;
 370                 }
 371         }
 372         printk(KERN_DEBUG "%s: not found 0x%x\n", __FUNCTION__, msr);
 373         return 0;
 374 }
 375
 376 static __init int svm_hardware_setup(void)
 377 {
 378         int cpu;
 379         struct page *iopm_pages;
 380         struct page *msrpm_pages;
 381         void *msrpm_va;
 382         int r;
 383
 384         kvm_emulator_want_group7_invlpg();
 385
 386         iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);
 387
 388         if (!iopm_pages)
 389                 return -ENOMEM;
 390         memset(page_address(iopm_pages), 0xff,
 391                                         PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
 392         iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;
 393
 394
 395         msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
 396
 397         r = -ENOMEM;
 398         if (!msrpm_pages)
 399                 goto err_1;
 400
 401         msrpm_va = page_address(msrpm_pages);
 402         memset(msrpm_va, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));
 403         msrpm_base = page_to_pfn(msrpm_pages) << PAGE_SHIFT;
 404
 405 #ifdef CONFIG_X86_64
 406         set_msr_interception(msrpm_va, MSR_GS_BASE, 1, 1);
 407         set_msr_interception(msrpm_va, MSR_FS_BASE, 1, 1);
 408         set_msr_interception(msrpm_va, MSR_KERNEL_GS_BASE, 1, 1);
 409         set_msr_interception(msrpm_va, MSR_LSTAR, 1, 1);
 410         set_msr_interception(msrpm_va, MSR_CSTAR, 1, 1);
 411         set_msr_interception(msrpm_va, MSR_SYSCALL_MASK, 1, 1);
 412 #endif
 413         set_msr_interception(msrpm_va, MSR_K6_STAR, 1, 1);
 414         set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_CS, 1, 1);
 415         set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_ESP, 1, 1);
 416         set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_EIP, 1, 1);
 417
 418         for_each_online_cpu(cpu) {
 419                 r = svm_cpu_init(cpu);
 420                 if (r)
 421                         goto err_2;
 422         }
 423         return 0;
 424
 425 err_2:
 426         __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER);
 427         msrpm_base = 0;
 428 err_1:
 429         __free_pages(iopm_pages, IOPM_ALLOC_ORDER);
 430         iopm_base = 0;
 431         return r;
 432 }
 433
 434 static __exit void svm_hardware_unsetup(void)
 435 {
 436         __free_pages(pfn_to_page(msrpm_base >> PAGE_SHIFT), MSRPM_ALLOC_ORDER);
 437         __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
 438         iopm_base = msrpm_base = 0;
 439 }
 440
 441 static void init_seg(struct vmcb_seg *seg)
 442 {
 443         seg->selector = 0;
 444         seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK |
 445                 SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
 446         seg->limit = 0xffff;
 447         seg->base = 0;
 448 }
 449
 450 static void init_sys_seg(struct vmcb_seg *seg, uint32_t type)
 451 {
 452         seg->selector = 0;
 453         seg->attrib = SVM_SELECTOR_P_MASK | type;
 454         seg->limit = 0xffff;
 455         seg->base = 0;
 456 }
 457
 458 static int svm_vcpu_setup(struct kvm_vcpu *vcpu)
 459 {
 460         return 0;
 461 }
 462
 463 static void init_vmcb(struct vmcb *vmcb)
 464 {
 465         struct vmcb_control_area *control = &vmcb->control;
 466         struct vmcb_save_area *save = &vmcb->save;
 467
 468         control->intercept_cr_read =    INTERCEPT_CR0_MASK |
 469                                         INTERCEPT_CR3_MASK |
 470                                         INTERCEPT_CR4_MASK;
 471
 472         control->intercept_cr_write =   INTERCEPT_CR0_MASK |
 473                                         INTERCEPT_CR3_MASK |
 474                                         INTERCEPT_CR4_MASK;
 475
 476         control->intercept_dr_read =    INTERCEPT_DR0_MASK |
 477                                         INTERCEPT_DR1_MASK |
 478                                         INTERCEPT_DR2_MASK |
 479                                         INTERCEPT_DR3_MASK;
 480
 481         control->intercept_dr_write =   INTERCEPT_DR0_MASK |
 482                                         INTERCEPT_DR1_MASK |
 483                                         INTERCEPT_DR2_MASK |
 484                                         INTERCEPT_DR3_MASK |
 485                                         INTERCEPT_DR5_MASK |
 486                                         INTERCEPT_DR7_MASK;
 487
 488         control->intercept_exceptions = 1 << PF_VECTOR;
 489
 490
 491         control->intercept =    (1ULL << INTERCEPT_INTR) |
 492                                 (1ULL << INTERCEPT_NMI) |
 493                                 (1ULL << INTERCEPT_SMI) |
 494                 /*
 495                  * selective cr0 intercept bug?
 496                  *      0:   0f 22 d8                mov    %eax,%cr3
 497                  *      3:   0f 20 c0                mov    %cr0,%eax
 498                  *      6:   0d 00 00 00 80          or     $0x80000000,%eax
 499                  *      b:   0f 22 c0                mov    %eax,%cr0
 500                  * set cr3 ->interception
 501                  * get cr0 ->interception
 502                  * set cr0 -> no interception
 503                  */
 504                 /*              (1ULL << INTERCEPT_SELECTIVE_CR0) | */
 505                                 (1ULL << INTERCEPT_CPUID) |
 506                                 (1ULL << INTERCEPT_HLT) |
 507                                 (1ULL << INTERCEPT_INVLPGA) |
 508                                 (1ULL << INTERCEPT_IOIO_PROT) |
 509                                 (1ULL << INTERCEPT_MSR_PROT) |
 510                                 (1ULL << INTERCEPT_TASK_SWITCH) |
 511                                 (1ULL << INTERCEPT_SHUTDOWN) |
 512                                 (1ULL << INTERCEPT_VMRUN) |
 513                                 (1ULL << INTERCEPT_VMMCALL) |
 514                                 (1ULL << INTERCEPT_VMLOAD) |
 515                                 (1ULL << INTERCEPT_VMSAVE) |
 516                                 (1ULL << INTERCEPT_STGI) |
 517                                 (1ULL << INTERCEPT_CLGI) |
 518                                 (1ULL << INTERCEPT_SKINIT) |
 519                                 (1ULL << INTERCEPT_MONITOR) |
 520                                 (1ULL << INTERCEPT_MWAIT);
 521
 522         control->iopm_base_pa = iopm_base;
 523         control->msrpm_base_pa = msrpm_base;
 524         control->tsc_offset = 0;
 525         control->int_ctl = V_INTR_MASKING_MASK;
 526
 527         init_seg(&save->es);
 528         init_seg(&save->ss);
 529         init_seg(&save->ds);
 530         init_seg(&save->fs);
 531         init_seg(&save->gs);
 532
 533         save->cs.selector = 0xf000;
 534         /* Executable/Readable Code Segment */
 535         save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK |
 536                 SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK;
 537         save->cs.limit = 0xffff;
 538         /*
 539          * cs.base should really be 0xffff0000, but vmx can't handle that, so
 540          * be consistent with it.
 541          *
 542          * Replace when we have real mode working for vmx.
 543          */
 544         save->cs.base = 0xf0000;
 545
 546         save->gdtr.limit = 0xffff;
 547         save->idtr.limit = 0xffff;
 548
 549         init_sys_seg(&save->ldtr, SEG_TYPE_LDT);
 550         init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16);
 551
 552         save->efer = MSR_EFER_SVME_MASK;
 553
 554         save->dr6 = 0xffff0ff0;
 555         save->dr7 = 0x400;
 556         save->rflags = 2;
 557         save->rip = 0x0000fff0;
 558
 559         /*
 560          * cr0 val on cpu init should be 0x60000010, we enable cpu
 561          * cache by default. the orderly way is to enable cache in bios.
 562          */
 563         save->cr0 = 0x00000010 | CR0_PG_MASK | CR0_WP_MASK;
 564         save->cr4 = CR4_PAE_MASK;
 565         /* rdx = ?? */
 566 }
 567
 568 static int svm_create_vcpu(struct kvm_vcpu *vcpu)
 569 {
 570         struct page *page;
 571         int r;
 572
 573         r = -ENOMEM;
 574         vcpu->svm = kzalloc(sizeof *vcpu->svm, GFP_KERNEL);
 575         if (!vcpu->svm)
 576                 goto out1;
 577         page = alloc_page(GFP_KERNEL);
 578         if (!page)
 579                 goto out2;
 580
 581         vcpu->svm->vmcb = page_address(page);
 582         memset(vcpu->svm->vmcb, 0, PAGE_SIZE);
 583         vcpu->svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT;
 584         vcpu->svm->asid_generation = 0;
 585         memset(vcpu->svm->db_regs, 0, sizeof(vcpu->svm->db_regs));
 586         init_vmcb(vcpu->svm->vmcb);
 587
 588         fx_init(vcpu);
 589         vcpu->fpu_active = 1;
 590         vcpu->apic_base = 0xfee00000 |
 591                         /*for vcpu 0*/ MSR_IA32_APICBASE_BSP |
 592                         MSR_IA32_APICBASE_ENABLE;
 593
 594         return 0;
 595
 596 out2:
 597         kfree(vcpu->svm);
 598 out1:
 599         return r;
 600 }
 601
 602 static void svm_free_vcpu(struct kvm_vcpu *vcpu)
 603 {
 604         if (!vcpu->svm)
 605                 return;
 606         if (vcpu->svm->vmcb)
 607                 __free_page(pfn_to_page(vcpu->svm->vmcb_pa >> PAGE_SHIFT));
 608         kfree(vcpu->svm);
 609 }
 610
 611 static void svm_vcpu_load(struct kvm_vcpu *vcpu)
 612 {
 613         int cpu, i;
 614
 615         cpu = get_cpu();
 616         if (unlikely(cpu != vcpu->cpu)) {
 617                 u64 tsc_this, delta;
 618
 619                 /*
 620                  * Make sure that the guest sees a monotonically
 621                  * increasing TSC.
 622                  */
 623                 rdtscll(tsc_this);
 624                 delta = vcpu->host_tsc - tsc_this;
 625                 vcpu->svm->vmcb->control.tsc_offset += delta;
 626                 vcpu->cpu = cpu;
 627         }
 628
 629         for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
 630                 rdmsrl(host_save_user_msrs[i], vcpu->svm->host_user_msrs[i]);
 631 }
 632
 633 static void svm_vcpu_put(struct kvm_vcpu *vcpu)
 634 {
 635         int i;
 636
 637         for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
 638                 wrmsrl(host_save_user_msrs[i], vcpu->svm->host_user_msrs[i]);
 639
 640         rdtscll(vcpu->host_tsc);
 641         put_cpu();
 642 }
 643
 644 static void svm_vcpu_decache(struct kvm_vcpu *vcpu)
 645 {
 646 }
 647
 648 static void svm_cache_regs(struct kvm_vcpu *vcpu)
 649 {
 650         vcpu->regs[VCPU_REGS_RAX] = vcpu->svm->vmcb->save.rax;
 651         vcpu->regs[VCPU_REGS_RSP] = vcpu->svm->vmcb->save.rsp;
 652         vcpu->rip = vcpu->svm->vmcb->save.rip;
 653 }
 654
 655 static void svm_decache_regs(struct kvm_vcpu *vcpu)
 656 {
 657         vcpu->svm->vmcb->save.rax = vcpu->regs[VCPU_REGS_RAX];
 658         vcpu->svm->vmcb->save.rsp = vcpu->regs[VCPU_REGS_RSP];
 659         vcpu->svm->vmcb->save.rip = vcpu->rip;
 660 }
 661
 662 static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
 663 {
 664         return vcpu->svm->vmcb->save.rflags;
 665 }
 666
 667 static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
 668 {
 669         vcpu->svm->vmcb->save.rflags = rflags;
 670 }
 671
 672 static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
 673 {
 674         struct vmcb_save_area *save = &vcpu->svm->vmcb->save;
 675
 676         switch (seg) {
 677         case VCPU_SREG_CS: return &save->cs;
 678         case VCPU_SREG_DS: return &save->ds;
 679         case VCPU_SREG_ES: return &save->es;
 680         case VCPU_SREG_FS: return &save->fs;
 681         case VCPU_SREG_GS: return &save->gs;
 682         case VCPU_SREG_SS: return &save->ss;
 683         case VCPU_SREG_TR: return &save->tr;
 684         case VCPU_SREG_LDTR: return &save->ldtr;
 685         }
 686         BUG();
 687         return NULL;
 688 }
 689
 690 static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg)
 691 {
 692         struct vmcb_seg *s = svm_seg(vcpu, seg);
 693
 694         return s->base;
 695 }
 696
 697 static void svm_get_segment(struct kvm_vcpu *vcpu,
 698                             struct kvm_segment *var, int seg)
 699 {
 700         struct vmcb_seg *s = svm_seg(vcpu, seg);
 701
 702         var->base = s->base;
 703         var->limit = s->limit;
 704         var->selector = s->selector;
 705         var->type = s->attrib & SVM_SELECTOR_TYPE_MASK;
 706         var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1;
 707         var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3;
 708         var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1;
 709         var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1;
 710         var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
 711         var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
 712         var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1;
 713         var->unusable = !var->present;
 714 }
 715
 716 static void svm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
 717 {
 718         struct vmcb_seg *s = svm_seg(vcpu, VCPU_SREG_CS);
 719
 720         *db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
 721         *l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
 722 }
 723
 724 static void svm_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
 725 {
 726         dt->limit = vcpu->svm->vmcb->save.idtr.limit;
 727         dt->base = vcpu->svm->vmcb->save.idtr.base;
 728 }
 729
 730 static void svm_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
 731 {
 732         vcpu->svm->vmcb->save.idtr.limit = dt->limit;
 733         vcpu->svm->vmcb->save.idtr.base = dt->base ;
 734 }
 735
 736 static void svm_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
 737 {
 738         dt->limit = vcpu->svm->vmcb->save.gdtr.limit;
 739         dt->base = vcpu->svm->vmcb->save.gdtr.base;
 740 }
 741
 742 static void svm_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
 743 {
 744         vcpu->svm->vmcb->save.gdtr.limit = dt->limit;
 745         vcpu->svm->vmcb->save.gdtr.base = dt->base ;
 746 }
 747
 748 static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
 749 {
 750 }
 751
 752 static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
 753 {
 754 #ifdef CONFIG_X86_64
 755         if (vcpu->shadow_efer & KVM_EFER_LME) {
 756                 if (!is_paging(vcpu) && (cr0 & CR0_PG_MASK)) {
 757                         vcpu->shadow_efer |= KVM_EFER_LMA;
 758                         vcpu->svm->vmcb->save.efer |= KVM_EFER_LMA | KVM_EFER_LME;
 759                 }
 760
 761                 if (is_paging(vcpu) && !(cr0 & CR0_PG_MASK) ) {
 762                         vcpu->shadow_efer &= ~KVM_EFER_LMA;
 763                         vcpu->svm->vmcb->save.efer &= ~(KVM_EFER_LMA | KVM_EFER_LME);
 764                 }
 765         }
 766 #endif
 767         if ((vcpu->cr0 & CR0_TS_MASK) && !(cr0 & CR0_TS_MASK)) {
 768                 vcpu->svm->vmcb->control.intercept_exceptions &= ~(1 << NM_VECTOR);
 769                 vcpu->fpu_active = 1;
 770         }
 771
 772         vcpu->cr0 = cr0;
 773         cr0 |= CR0_PG_MASK | CR0_WP_MASK;
 774         cr0 &= ~(CR0_CD_MASK | CR0_NW_MASK);
 775         vcpu->svm->vmcb->save.cr0 = cr0;
 776 }
 777
 778 static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
 779 {
 780        vcpu->cr4 = cr4;
 781        vcpu->svm->vmcb->save.cr4 = cr4 | CR4_PAE_MASK;
 782 }
 783
 784 static void svm_set_segment(struct kvm_vcpu *vcpu,
 785                             struct kvm_segment *var, int seg)
 786 {
 787         struct vmcb_seg *s = svm_seg(vcpu, seg);
 788
 789         s->base = var->base;
 790         s->limit = var->limit;
 791         s->selector = var->selector;
 792         if (var->unusable)
 793                 s->attrib = 0;
 794         else {
 795                 s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK);
 796                 s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT;
 797                 s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT;
 798                 s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT;
 799                 s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT;
 800                 s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT;
 801                 s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
 802                 s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
 803         }
 804         if (seg == VCPU_SREG_CS)
 805                 vcpu->svm->vmcb->save.cpl
 806                         = (vcpu->svm->vmcb->save.cs.attrib
 807                            >> SVM_SELECTOR_DPL_SHIFT) & 3;
 808
 809 }
 810
 811 /* FIXME:
 812
 813         vcpu->svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
 814         vcpu->svm->vmcb->control.int_ctl |= (sregs->cr8 & V_TPR_MASK);
 815
 816 */
 817
 818 static int svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg)
 819 {
 820         return -EOPNOTSUPP;
 821 }
 822
 823 static void load_host_msrs(struct kvm_vcpu *vcpu)
 824 {
 825 #ifdef CONFIG_X86_64
 826         wrmsrl(MSR_GS_BASE, vcpu->svm->host_gs_base);
 827 #endif
 828 }
 829
 830 static void save_host_msrs(struct kvm_vcpu *vcpu)
 831 {
 832 #ifdef CONFIG_X86_64
 833         rdmsrl(MSR_GS_BASE, vcpu->svm->host_gs_base);
 834 #endif
 835 }
 836
 837 static void new_asid(struct kvm_vcpu *vcpu, struct svm_cpu_data *svm_data)
 838 {
 839         if (svm_data->next_asid > svm_data->max_asid) {
 840                 ++svm_data->asid_generation;
 841                 svm_data->next_asid = 1;
 842                 vcpu->svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
 843         }
 844
 845         vcpu->cpu = svm_data->cpu;
 846         vcpu->svm->asid_generation = svm_data->asid_generation;
 847         vcpu->svm->vmcb->control.asid = svm_data->next_asid++;
 848 }
 849
 850 static void svm_invlpg(struct kvm_vcpu *vcpu, gva_t address)
 851 {
 852         invlpga(address, vcpu->svm->vmcb->control.asid); // is needed?
 853 }
 854
 855 static unsigned long svm_get_dr(struct kvm_vcpu *vcpu, int dr)
 856 {
 857         return vcpu->svm->db_regs[dr];
 858 }
 859
 860 static void svm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long value,
 861                        int *exception)
 862 {
 863         *exception = 0;
 864
 865         if (vcpu->svm->vmcb->save.dr7 & DR7_GD_MASK) {
 866                 vcpu->svm->vmcb->save.dr7 &= ~DR7_GD_MASK;
 867                 vcpu->svm->vmcb->save.dr6 |= DR6_BD_MASK;
 868                 *exception = DB_VECTOR;
 869                 return;
 870         }
 871
 872         switch (dr) {
 873         case 0 ... 3:
 874                 vcpu->svm->db_regs[dr] = value;
 875                 return;
 876         case 4 ... 5:
 877                 if (vcpu->cr4 & CR4_DE_MASK) {
 878                         *exception = UD_VECTOR;
 879                         return;
 880                 }
 881         case 7: {
 882                 if (value & ~((1ULL << 32) - 1)) {
 883                         *exception = GP_VECTOR;
 884                         return;
 885                 }
 886                 vcpu->svm->vmcb->save.dr7 = value;
 887                 return;
 888         }
 889         default:
 890                 printk(KERN_DEBUG "%s: unexpected dr %u\n",
 891                        __FUNCTION__, dr);
 892                 *exception = UD_VECTOR;
 893                 return;
 894         }
 895 }
 896
 897 static int pf_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 898 {
 899         u32 exit_int_info = vcpu->svm->vmcb->control.exit_int_info;
 900         u64 fault_address;
 901         u32 error_code;
 902         enum emulation_result er;
 903         int r;
 904
 905         if (is_external_interrupt(exit_int_info))
 906                 push_irq(vcpu, exit_int_info & SVM_EVTINJ_VEC_MASK);
 907
 908         spin_lock(&vcpu->kvm->lock);
 909
 910         fault_address  = vcpu->svm->vmcb->control.exit_info_2;
 911         error_code = vcpu->svm->vmcb->control.exit_info_1;
 912         r = kvm_mmu_page_fault(vcpu, fault_address, error_code);
 913         if (r < 0) {
 914                 spin_unlock(&vcpu->kvm->lock);
 915                 return r;
 916         }
 917         if (!r) {
 918                 spin_unlock(&vcpu->kvm->lock);
 919                 return 1;
 920         }
 921         er = emulate_instruction(vcpu, kvm_run, fault_address, error_code);
 922         spin_unlock(&vcpu->kvm->lock);
 923
 924         switch (er) {
 925         case EMULATE_DONE:
 926                 return 1;
 927         case EMULATE_DO_MMIO:
 928                 ++vcpu->stat.mmio_exits;
 929                 kvm_run->exit_reason = KVM_EXIT_MMIO;
 930                 return 0;
 931         case EMULATE_FAIL:
 932                 vcpu_printf(vcpu, "%s: emulate fail\n", __FUNCTION__);
 933                 break;
 934         default:
 935                 BUG();
 936         }
 937
 938         kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 939         return 0;
 940 }
 941
 942 static int nm_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 943 {
 944        vcpu->svm->vmcb->control.intercept_exceptions &= ~(1 << NM_VECTOR);
 945        if (!(vcpu->cr0 & CR0_TS_MASK))
 946                vcpu->svm->vmcb->save.cr0 &= ~CR0_TS_MASK;
 947        vcpu->fpu_active = 1;
 948
 949        return 1;
 950 }
 951
 952 static int shutdown_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 953 {
 954         /*
 955          * VMCB is undefined after a SHUTDOWN intercept
 956          * so reinitialize it.
 957          */
 958         memset(vcpu->svm->vmcb, 0, PAGE_SIZE);
 959         init_vmcb(vcpu->svm->vmcb);
 960
 961         kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
 962         return 0;
 963 }
 964
 965 static int io_get_override(struct kvm_vcpu *vcpu,
 966                           struct vmcb_seg **seg,
 967                           int *addr_override)
 968 {
 969         u8 inst[MAX_INST_SIZE];
 970         unsigned ins_length;
 971         gva_t rip;
 972         int i;
 973
 974         rip =  vcpu->svm->vmcb->save.rip;
 975         ins_length = vcpu->svm->next_rip - rip;
 976         rip += vcpu->svm->vmcb->save.cs.base;
 977
 978         if (ins_length > MAX_INST_SIZE)
 979                 printk(KERN_DEBUG
 980                        "%s: inst length err, cs base 0x%llx rip 0x%llx "
 981                        "next rip 0x%llx ins_length %u\n",
 982                        __FUNCTION__,
 983                        vcpu->svm->vmcb->save.cs.base,
 984                        vcpu->svm->vmcb->save.rip,
 985                        vcpu->svm->vmcb->control.exit_info_2,
 986                        ins_length);
 987
 988         if (kvm_read_guest(vcpu, rip, ins_length, inst) != ins_length)
 989                 /* #PF */
 990                 return 0;
 991
 992         *addr_override = 0;
 993         *seg = NULL;
 994         for (i = 0; i < ins_length; i++)
 995                 switch (inst[i]) {
 996                 case 0xf0:
 997                 case 0xf2:
 998                 case 0xf3:
 999                 case 0x66:
1000                         continue;
1001                 case 0x67:
1002                         *addr_override = 1;
1003                         continue;
1004                 case 0x2e:
1005                         *seg = &vcpu->svm->vmcb->save.cs;
1006                         continue;
1007                 case 0x36:
1008                         *seg = &vcpu->svm->vmcb->save.ss;
1009                         continue;
1010                 case 0x3e:
1011                         *seg = &vcpu->svm->vmcb->save.ds;
1012                         continue;
1013                 case 0x26:
1014                         *seg = &vcpu->svm->vmcb->save.es;
1015                         continue;
1016                 case 0x64:
1017                         *seg = &vcpu->svm->vmcb->save.fs;
1018                         continue;
1019                 case 0x65:
1020                         *seg = &vcpu->svm->vmcb->save.gs;
1021                         continue;
1022                 default:
1023                         return 1;
1024                 }
1025         printk(KERN_DEBUG "%s: unexpected\n", __FUNCTION__);
1026         return 0;
1027 }
1028
1029 static unsigned long io_adress(struct kvm_vcpu *vcpu, int ins, gva_t *address)
1030 {
1031         unsigned long addr_mask;
1032         unsigned long *reg;
1033         struct vmcb_seg *seg;
1034         int addr_override;
1035         struct vmcb_save_area *save_area = &vcpu->svm->vmcb->save;
1036         u16 cs_attrib = save_area->cs.attrib;
1037         unsigned addr_size = get_addr_size(vcpu);
1038
1039         if (!io_get_override(vcpu, &seg, &addr_override))
1040                 return 0;
1041
1042         if (addr_override)
1043                 addr_size = (addr_size == 2) ? 4: (addr_size >> 1);
1044
1045         if (ins) {
1046                 reg = &vcpu->regs[VCPU_REGS_RDI];
1047                 seg = &vcpu->svm->vmcb->save.es;
1048         } else {
1049                 reg = &vcpu->regs[VCPU_REGS_RSI];
1050                 seg = (seg) ? seg : &vcpu->svm->vmcb->save.ds;
1051         }
1052
1053         addr_mask = ~0ULL >> (64 - (addr_size * 8));
1054
1055         if ((cs_attrib & SVM_SELECTOR_L_MASK) &&
1056             !(vcpu->svm->vmcb->save.rflags & X86_EFLAGS_VM)) {
1057                 *address = (*reg & addr_mask);
1058                 return addr_mask;
1059         }
1060
1061         if (!(seg->attrib & SVM_SELECTOR_P_SHIFT)) {
1062                 svm_inject_gp(vcpu, 0);
1063                 return 0;
1064         }
1065
1066         *address = (*reg & addr_mask) + seg->base;
1067         return addr_mask;
1068 }
1069
1070 static int io_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1071 {
1072         u32 io_info = vcpu->svm->vmcb->control.exit_info_1; //address size bug?
1073         int size, down, in, string, rep;
1074         unsigned port;
1075         unsigned long count;
1076         gva_t address = 0;
1077
1078         ++vcpu->stat.io_exits;
1079
1080         vcpu->svm->next_rip = vcpu->svm->vmcb->control.exit_info_2;
1081
1082         in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
1083         port = io_info >> 16;
1084         size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
1085         string = (io_info & SVM_IOIO_STR_MASK) != 0;
1086         rep = (io_info & SVM_IOIO_REP_MASK) != 0;
1087         count = 1;
1088         down = (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_DF) != 0;
1089
1090         if (string) {
1091                 unsigned addr_mask;
1092
1093                 addr_mask = io_adress(vcpu, in, &address);
1094                 if (!addr_mask) {
1095                         printk(KERN_DEBUG "%s: get io address failed\n",
1096                                __FUNCTION__);
1097                         return 1;
1098                 }
1099
1100                 if (rep)
1101                         count = vcpu->regs[VCPU_REGS_RCX] & addr_mask;
1102         }
1103         return kvm_setup_pio(vcpu, kvm_run, in, size, count, string, down,
1104                              address, rep, port);
1105 }
1106
1107 static int nop_on_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1108 {
1109         return 1;
1110 }
1111
1112 static int halt_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1113 {
1114         vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 1;
1115         skip_emulated_instruction(vcpu);
1116         if (vcpu->irq_summary)
1117                 return 1;
1118
1119         kvm_run->exit_reason = KVM_EXIT_HLT;
1120         ++vcpu->stat.halt_exits;
1121         return 0;
1122 }
1123
1124 static int vmmcall_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1125 {
1126         vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 3;
1127         skip_emulated_instruction(vcpu);
1128         return kvm_hypercall(vcpu, kvm_run);
1129 }
1130
1131 static int invalid_op_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1132 {
1133         inject_ud(vcpu);
1134         return 1;
1135 }
1136
1137 static int task_switch_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1138 {
1139         printk(KERN_DEBUG "%s: task swiche is unsupported\n", __FUNCTION__);
1140         kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
1141         return 0;
1142 }
1143
1144 static int cpuid_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1145 {
1146         vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2;
1147         kvm_emulate_cpuid(vcpu);
1148         return 1;
1149 }
1150
1151 static int emulate_on_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1152 {
1153         if (emulate_instruction(vcpu, NULL, 0, 0) != EMULATE_DONE)
1154                 printk(KERN_ERR "%s: failed\n", __FUNCTION__);
1155         return 1;
1156 }
1157
1158 static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data)
1159 {
1160         switch (ecx) {
1161         case MSR_IA32_TIME_STAMP_COUNTER: {
1162                 u64 tsc;
1163
1164                 rdtscll(tsc);
1165                 *data = vcpu->svm->vmcb->control.tsc_offset + tsc;
1166                 break;
1167         }
1168         case MSR_K6_STAR:
1169                 *data = vcpu->svm->vmcb->save.star;
1170                 break;
1171 #ifdef CONFIG_X86_64
1172         case MSR_LSTAR:
1173                 *data = vcpu->svm->vmcb->save.lstar;
1174                 break;
1175         case MSR_CSTAR:
1176                 *data = vcpu->svm->vmcb->save.cstar;
1177                 break;
1178         case MSR_KERNEL_GS_BASE:
1179                 *data = vcpu->svm->vmcb->save.kernel_gs_base;
1180                 break;
1181         case MSR_SYSCALL_MASK:
1182                 *data = vcpu->svm->vmcb->save.sfmask;
1183                 break;
1184 #endif
1185         case MSR_IA32_SYSENTER_CS:
1186                 *data = vcpu->svm->vmcb->save.sysenter_cs;
1187                 break;
1188         case MSR_IA32_SYSENTER_EIP:
1189                 *data = vcpu->svm->vmcb->save.sysenter_eip;
1190                 break;
1191         case MSR_IA32_SYSENTER_ESP:
1192                 *data = vcpu->svm->vmcb->save.sysenter_esp;
1193                 break;
1194         default:
1195                 return kvm_get_msr_common(vcpu, ecx, data);
1196         }
1197         return 0;
1198 }
1199
1200 static int rdmsr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1201 {
1202         u32 ecx = vcpu->regs[VCPU_REGS_RCX];
1203         u64 data;
1204
1205         if (svm_get_msr(vcpu, ecx, &data))
1206                 svm_inject_gp(vcpu, 0);
1207         else {
1208                 vcpu->svm->vmcb->save.rax = data & 0xffffffff;
1209                 vcpu->regs[VCPU_REGS_RDX] = data >> 32;
1210                 vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2;
1211                 skip_emulated_instruction(vcpu);
1212         }
1213         return 1;
1214 }
1215
1216 static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data)
1217 {
1218         switch (ecx) {
1219         case MSR_IA32_TIME_STAMP_COUNTER: {
1220                 u64 tsc;
1221
1222                 rdtscll(tsc);
1223                 vcpu->svm->vmcb->control.tsc_offset = data - tsc;
1224                 break;
1225         }
1226         case MSR_K6_STAR:
1227                 vcpu->svm->vmcb->save.star = data;
1228                 break;
1229 #ifdef CONFIG_X86_64
1230         case MSR_LSTAR:
1231                 vcpu->svm->vmcb->save.lstar = data;
1232                 break;
1233         case MSR_CSTAR:
1234                 vcpu->svm->vmcb->save.cstar = data;
1235                 break;
1236         case MSR_KERNEL_GS_BASE:
1237                 vcpu->svm->vmcb->save.kernel_gs_base = data;
1238                 break;
1239         case MSR_SYSCALL_MASK:
1240                 vcpu->svm->vmcb->save.sfmask = data;
1241                 break;
1242 #endif
1243         case MSR_IA32_SYSENTER_CS:
1244                 vcpu->svm->vmcb->save.sysenter_cs = data;
1245                 break;
1246         case MSR_IA32_SYSENTER_EIP:
1247                 vcpu->svm->vmcb->save.sysenter_eip = data;
1248                 break;
1249         case MSR_IA32_SYSENTER_ESP:
1250                 vcpu->svm->vmcb->save.sysenter_esp = data;
1251                 break;
1252         default:
1253                 return kvm_set_msr_common(vcpu, ecx, data);
1254         }
1255         return 0;
1256 }
1257
1258 static int wrmsr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1259 {
1260         u32 ecx = vcpu->regs[VCPU_REGS_RCX];
1261         u64 data = (vcpu->svm->vmcb->save.rax & -1u)
1262                 | ((u64)(vcpu->regs[VCPU_REGS_RDX] & -1u) << 32);
1263         vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2;
1264         if (svm_set_msr(vcpu, ecx, data))
1265                 svm_inject_gp(vcpu, 0);
1266         else
1267                 skip_emulated_instruction(vcpu);
1268         return 1;
1269 }
1270
1271 static int msr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1272 {
1273         if (vcpu->svm->vmcb->control.exit_info_1)
1274                 return wrmsr_interception(vcpu, kvm_run);
1275         else
1276                 return rdmsr_interception(vcpu, kvm_run);
1277 }
1278
1279 static int interrupt_window_interception(struct kvm_vcpu *vcpu,
1280                                    struct kvm_run *kvm_run)
1281 {
1282         /*
1283          * If the user space waits to inject interrupts, exit as soon as
1284          * possible
1285          */
1286         if (kvm_run->request_interrupt_window &&
1287             !vcpu->irq_summary) {
1288                 ++vcpu->stat.irq_window_exits;
1289                 kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
1290                 return 0;
1291         }
1292
1293         return 1;
1294 }
1295
1296 static int (*svm_exit_handlers[])(struct kvm_vcpu *vcpu,
1297                                       struct kvm_run *kvm_run) = {
1298         [SVM_EXIT_READ_CR0]                     = emulate_on_interception,
1299         [SVM_EXIT_READ_CR3]                     = emulate_on_interception,
1300         [SVM_EXIT_READ_CR4]                     = emulate_on_interception,
1301         /* for now: */
1302         [SVM_EXIT_WRITE_CR0]                    = emulate_on_interception,
1303         [SVM_EXIT_WRITE_CR3]                    = emulate_on_interception,
1304         [SVM_EXIT_WRITE_CR4]                    = emulate_on_interception,
1305         [SVM_EXIT_READ_DR0]                     = emulate_on_interception,
1306         [SVM_EXIT_READ_DR1]                     = emulate_on_interception,
1307         [SVM_EXIT_READ_DR2]                     = emulate_on_interception,
1308         [SVM_EXIT_READ_DR3]                     = emulate_on_interception,
1309         [SVM_EXIT_WRITE_DR0]                    = emulate_on_interception,
1310         [SVM_EXIT_WRITE_DR1]                    = emulate_on_interception,
1311         [SVM_EXIT_WRITE_DR2]                    = emulate_on_interception,
1312         [SVM_EXIT_WRITE_DR3]                    = emulate_on_interception,
1313         [SVM_EXIT_WRITE_DR5]                    = emulate_on_interception,
1314         [SVM_EXIT_WRITE_DR7]                    = emulate_on_interception,
1315         [SVM_EXIT_EXCP_BASE + PF_VECTOR]        = pf_interception,
1316         [SVM_EXIT_EXCP_BASE + NM_VECTOR]        = nm_interception,
1317         [SVM_EXIT_INTR]                         = nop_on_interception,
1318         [SVM_EXIT_NMI]                          = nop_on_interception,
1319         [SVM_EXIT_SMI]                          = nop_on_interception,
1320         [SVM_EXIT_INIT]                         = nop_on_interception,
1321         [SVM_EXIT_VINTR]                        = interrupt_window_interception,
1322         /* [SVM_EXIT_CR0_SEL_WRITE]             = emulate_on_interception, */
1323         [SVM_EXIT_CPUID]                        = cpuid_interception,
1324         [SVM_EXIT_HLT]                          = halt_interception,
1325         [SVM_EXIT_INVLPG]                       = emulate_on_interception,
1326         [SVM_EXIT_INVLPGA]                      = invalid_op_interception,
1327         [SVM_EXIT_IOIO]                         = io_interception,
1328         [SVM_EXIT_MSR]                          = msr_interception,
1329         [SVM_EXIT_TASK_SWITCH]                  = task_switch_interception,
1330         [SVM_EXIT_SHUTDOWN]                     = shutdown_interception,
1331         [SVM_EXIT_VMRUN]                        = invalid_op_interception,
1332         [SVM_EXIT_VMMCALL]                      = vmmcall_interception,
1333         [SVM_EXIT_VMLOAD]                       = invalid_op_interception,
1334         [SVM_EXIT_VMSAVE]                       = invalid_op_interception,
1335         [SVM_EXIT_STGI]                         = invalid_op_interception,
1336         [SVM_EXIT_CLGI]                         = invalid_op_interception,
1337         [SVM_EXIT_SKINIT]                       = invalid_op_interception,
1338         [SVM_EXIT_MONITOR]                      = invalid_op_interception,
1339         [SVM_EXIT_MWAIT]                        = invalid_op_interception,
1340 };
1341
1342
1343 static int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1344 {
1345         u32 exit_code = vcpu->svm->vmcb->control.exit_code;
1346
1347         if (is_external_interrupt(vcpu->svm->vmcb->control.exit_int_info) &&
1348             exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR)
1349                 printk(KERN_ERR "%s: unexpected exit_ini_info 0x%x "
1350                        "exit_code 0x%x\n",
1351                        __FUNCTION__, vcpu->svm->vmcb->control.exit_int_info,
1352                        exit_code);
1353
1354         if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
1355             || svm_exit_handlers[exit_code] == 0) {
1356                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
1357                 kvm_run->hw.hardware_exit_reason = exit_code;
1358                 return 0;
1359         }
1360
1361         return svm_exit_handlers[exit_code](vcpu, kvm_run);
1362 }
1363
1364 static void reload_tss(struct kvm_vcpu *vcpu)
1365 {
1366         int cpu = raw_smp_processor_id();
1367
1368         struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
1369         svm_data->tss_desc->type = 9; //available 32/64-bit TSS
1370         load_TR_desc();
1371 }
1372
1373 static void pre_svm_run(struct kvm_vcpu *vcpu)
1374 {
1375         int cpu = raw_smp_processor_id();
1376
1377         struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
1378
1379         vcpu->svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
1380         if (vcpu->cpu != cpu ||
1381             vcpu->svm->asid_generation != svm_data->asid_generation)
1382                 new_asid(vcpu, svm_data);
1383 }
1384
1385
1386 static inline void kvm_do_inject_irq(struct kvm_vcpu *vcpu)
1387 {
1388         struct vmcb_control_area *control;
1389
1390         control = &vcpu->svm->vmcb->control;
1391         control->int_vector = pop_irq(vcpu);
1392         control->int_ctl &= ~V_INTR_PRIO_MASK;
1393         control->int_ctl |= V_IRQ_MASK |
1394                 ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
1395 }
1396
1397 static void kvm_reput_irq(struct kvm_vcpu *vcpu)
1398 {
1399         struct vmcb_control_area *control = &vcpu->svm->vmcb->control;
1400
1401         if (control->int_ctl & V_IRQ_MASK) {
1402                 control->int_ctl &= ~V_IRQ_MASK;
1403                 push_irq(vcpu, control->int_vector);
1404         }
1405
1406         vcpu->interrupt_window_open =
1407                 !(control->int_state & SVM_INTERRUPT_SHADOW_MASK);
1408 }
1409
1410 static void do_interrupt_requests(struct kvm_vcpu *vcpu,
1411                                        struct kvm_run *kvm_run)
1412 {
1413         struct vmcb_control_area *control = &vcpu->svm->vmcb->control;
1414
1415         vcpu->interrupt_window_open =
1416                 (!(control->int_state & SVM_INTERRUPT_SHADOW_MASK) &&
1417                  (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF));
1418
1419         if (vcpu->interrupt_window_open && vcpu->irq_summary)
1420                 /*
1421                  * If interrupts enabled, and not blocked by sti or mov ss. Good.
1422                  */
1423                 kvm_do_inject_irq(vcpu);
1424
1425         /*
1426          * Interrupts blocked.  Wait for unblock.
1427          */
1428         if (!vcpu->interrupt_window_open &&
1429             (vcpu->irq_summary || kvm_run->request_interrupt_window)) {
1430                 control->intercept |= 1ULL << INTERCEPT_VINTR;
1431         } else
1432                 control->intercept &= ~(1ULL << INTERCEPT_VINTR);
1433 }
1434
1435 static void post_kvm_run_save(struct kvm_vcpu *vcpu,
1436                               struct kvm_run *kvm_run)
1437 {
1438         kvm_run->ready_for_interrupt_injection = (vcpu->interrupt_window_open &&
1439                                                   vcpu->irq_summary == 0);
1440         kvm_run->if_flag = (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF) != 0;
1441         kvm_run->cr8 = vcpu->cr8;
1442         kvm_run->apic_base = vcpu->apic_base;
1443 }
1444
1445 /*
1446  * Check if userspace requested an interrupt window, and that the
1447  * interrupt window is open.
1448  *
1449  * No need to exit to userspace if we already have an interrupt queued.
1450  */
1451 static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
1452                                           struct kvm_run *kvm_run)
1453 {
1454         return (!vcpu->irq_summary &&
1455                 kvm_run->request_interrupt_window &&
1456                 vcpu->interrupt_window_open &&
1457                 (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF));
1458 }
1459
1460 static void save_db_regs(unsigned long *db_regs)
1461 {
1462         asm volatile ("mov %%dr0, %0" : "=r"(db_regs[0]));
1463         asm volatile ("mov %%dr1, %0" : "=r"(db_regs[1]));
1464         asm volatile ("mov %%dr2, %0" : "=r"(db_regs[2]));
1465         asm volatile ("mov %%dr3, %0" : "=r"(db_regs[3]));
1466 }
1467
1468 static void load_db_regs(unsigned long *db_regs)
1469 {
1470         asm volatile ("mov %0, %%dr0" : : "r"(db_regs[0]));
1471         asm volatile ("mov %0, %%dr1" : : "r"(db_regs[1]));
1472         asm volatile ("mov %0, %%dr2" : : "r"(db_regs[2]));
1473         asm volatile ("mov %0, %%dr3" : : "r"(db_regs[3]));
1474 }
1475
1476 static int svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1477 {
1478         u16 fs_selector;
1479         u16 gs_selector;
1480         u16 ldt_selector;
1481         int r;
1482
1483 again:
1484         if (!vcpu->mmio_read_completed)
1485                 do_interrupt_requests(vcpu, kvm_run);
1486
1487         clgi();
1488
1489         pre_svm_run(vcpu);
1490
1491         save_host_msrs(vcpu);
1492         fs_selector = read_fs();
1493         gs_selector = read_gs();
1494         ldt_selector = read_ldt();
1495         vcpu->svm->host_cr2 = kvm_read_cr2();
1496         vcpu->svm->host_dr6 = read_dr6();
1497         vcpu->svm->host_dr7 = read_dr7();
1498         vcpu->svm->vmcb->save.cr2 = vcpu->cr2;
1499
1500         if (vcpu->svm->vmcb->save.dr7 & 0xff) {
1501                 write_dr7(0);
1502                 save_db_regs(vcpu->svm->host_db_regs);
1503                 load_db_regs(vcpu->svm->db_regs);
1504         }
1505
1506         if (vcpu->fpu_active) {
1507                 fx_save(vcpu->host_fx_image);
1508                 fx_restore(vcpu->guest_fx_image);
1509         }
1510
1511         asm volatile (
1512 #ifdef CONFIG_X86_64
1513                 "push %%rbx; push %%rcx; push %%rdx;"
1514                 "push %%rsi; push %%rdi; push %%rbp;"
1515                 "push %%r8;  push %%r9;  push %%r10; push %%r11;"
1516                 "push %%r12; push %%r13; push %%r14; push %%r15;"
1517 #else
1518                 "push %%ebx; push %%ecx; push %%edx;"
1519                 "push %%esi; push %%edi; push %%ebp;"
1520 #endif
1521
1522 #ifdef CONFIG_X86_64
1523                 "mov %c[rbx](%[vcpu]), %%rbx \n\t"
1524                 "mov %c[rcx](%[vcpu]), %%rcx \n\t"
1525                 "mov %c[rdx](%[vcpu]), %%rdx \n\t"
1526                 "mov %c[rsi](%[vcpu]), %%rsi \n\t"
1527                 "mov %c[rdi](%[vcpu]), %%rdi \n\t"
1528                 "mov %c[rbp](%[vcpu]), %%rbp \n\t"
1529                 "mov %c[r8](%[vcpu]),  %%r8  \n\t"
1530                 "mov %c[r9](%[vcpu]),  %%r9  \n\t"
1531                 "mov %c[r10](%[vcpu]), %%r10 \n\t"
1532                 "mov %c[r11](%[vcpu]), %%r11 \n\t"
1533                 "mov %c[r12](%[vcpu]), %%r12 \n\t"
1534                 "mov %c[r13](%[vcpu]), %%r13 \n\t"
1535                 "mov %c[r14](%[vcpu]), %%r14 \n\t"
1536                 "mov %c[r15](%[vcpu]), %%r15 \n\t"
1537 #else
1538                 "mov %c[rbx](%[vcpu]), %%ebx \n\t"
1539                 "mov %c[rcx](%[vcpu]), %%ecx \n\t"
1540                 "mov %c[rdx](%[vcpu]), %%edx \n\t"
1541                 "mov %c[rsi](%[vcpu]), %%esi \n\t"
1542                 "mov %c[rdi](%[vcpu]), %%edi \n\t"
1543                 "mov %c[rbp](%[vcpu]), %%ebp \n\t"
1544 #endif
1545
1546 #ifdef CONFIG_X86_64
1547                 /* Enter guest mode */
1548                 "push %%rax \n\t"
1549                 "mov %c[svm](%[vcpu]), %%rax \n\t"
1550                 "mov %c[vmcb](%%rax), %%rax \n\t"
1551                 SVM_VMLOAD "\n\t"
1552                 SVM_VMRUN "\n\t"
1553                 SVM_VMSAVE "\n\t"
1554                 "pop %%rax \n\t"
1555 #else
1556                 /* Enter guest mode */
1557                 "push %%eax \n\t"
1558                 "mov %c[svm](%[vcpu]), %%eax \n\t"
1559                 "mov %c[vmcb](%%eax), %%eax \n\t"
1560                 SVM_VMLOAD "\n\t"
1561                 SVM_VMRUN "\n\t"
1562                 SVM_VMSAVE "\n\t"
1563                 "pop %%eax \n\t"
1564 #endif
1565
1566                 /* Save guest registers, load host registers */
1567 #ifdef CONFIG_X86_64
1568                 "mov %%rbx, %c[rbx](%[vcpu]) \n\t"
1569                 "mov %%rcx, %c[rcx](%[vcpu]) \n\t"
1570                 "mov %%rdx, %c[rdx](%[vcpu]) \n\t"
1571                 "mov %%rsi, %c[rsi](%[vcpu]) \n\t"
1572                 "mov %%rdi, %c[rdi](%[vcpu]) \n\t"
1573                 "mov %%rbp, %c[rbp](%[vcpu]) \n\t"
1574                 "mov %%r8,  %c[r8](%[vcpu]) \n\t"
1575                 "mov %%r9,  %c[r9](%[vcpu]) \n\t"
1576                 "mov %%r10, %c[r10](%[vcpu]) \n\t"
1577                 "mov %%r11, %c[r11](%[vcpu]) \n\t"
1578                 "mov %%r12, %c[r12](%[vcpu]) \n\t"
1579                 "mov %%r13, %c[r13](%[vcpu]) \n\t"
1580                 "mov %%r14, %c[r14](%[vcpu]) \n\t"
1581                 "mov %%r15, %c[r15](%[vcpu]) \n\t"
1582
1583                 "pop  %%r15; pop  %%r14; pop  %%r13; pop  %%r12;"
1584                 "pop  %%r11; pop  %%r10; pop  %%r9;  pop  %%r8;"
1585                 "pop  %%rbp; pop  %%rdi; pop  %%rsi;"
1586                 "pop  %%rdx; pop  %%rcx; pop  %%rbx; \n\t"
1587 #else
1588                 "mov %%ebx, %c[rbx](%[vcpu]) \n\t"
1589                 "mov %%ecx, %c[rcx](%[vcpu]) \n\t"
1590                 "mov %%edx, %c[rdx](%[vcpu]) \n\t"
1591                 "mov %%esi, %c[rsi](%[vcpu]) \n\t"
1592                 "mov %%edi, %c[rdi](%[vcpu]) \n\t"
1593                 "mov %%ebp, %c[rbp](%[vcpu]) \n\t"
1594
1595                 "pop  %%ebp; pop  %%edi; pop  %%esi;"
1596                 "pop  %%edx; pop  %%ecx; pop  %%ebx; \n\t"
1597 #endif
1598                 :
1599                 : [vcpu]"a"(vcpu),
1600                   [svm]"i"(offsetof(struct kvm_vcpu, svm)),
1601                   [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
1602                   [rbx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBX])),
1603                   [rcx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RCX])),
1604                   [rdx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RDX])),
1605                   [rsi]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RSI])),
1606                   [rdi]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RDI])),
1607                   [rbp]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBP]))
1608 #ifdef CONFIG_X86_64
1609                   ,[r8 ]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R8 ])),
1610                   [r9 ]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R9 ])),
1611                   [r10]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R10])),
1612                   [r11]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R11])),
1613                   [r12]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R12])),
1614                   [r13]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R13])),
1615                   [r14]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R14])),
1616                   [r15]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R15]))
1617 #endif
1618                 : "cc", "memory" );
1619
1620         if (vcpu->fpu_active) {
1621                 fx_save(vcpu->guest_fx_image);
1622                 fx_restore(vcpu->host_fx_image);
1623         }
1624
1625         if ((vcpu->svm->vmcb->save.dr7 & 0xff))
1626                 load_db_regs(vcpu->svm->host_db_regs);
1627
1628         vcpu->cr2 = vcpu->svm->vmcb->save.cr2;
1629
1630         write_dr6(vcpu->svm->host_dr6);
1631         write_dr7(vcpu->svm->host_dr7);
1632         kvm_write_cr2(vcpu->svm->host_cr2);
1633
1634         load_fs(fs_selector);
1635         load_gs(gs_selector);
1636         load_ldt(ldt_selector);
1637         load_host_msrs(vcpu);
1638
1639         reload_tss(vcpu);
1640
1641         /*
1642          * Profile KVM exit RIPs:
1643          */
1644         if (unlikely(prof_on == KVM_PROFILING))
1645                 profile_hit(KVM_PROFILING,
1646                         (void *)(unsigned long)vcpu->svm->vmcb->save.rip);
1647
1648         stgi();
1649
1650         kvm_reput_irq(vcpu);
1651
1652         vcpu->svm->next_rip = 0;
1653
1654         if (vcpu->svm->vmcb->control.exit_code == SVM_EXIT_ERR) {
1655                 kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
1656                 kvm_run->fail_entry.hardware_entry_failure_reason
1657                         = vcpu->svm->vmcb->control.exit_code;
1658                 post_kvm_run_save(vcpu, kvm_run);
1659                 return 0;
1660         }
1661
1662         r = handle_exit(vcpu, kvm_run);
1663         if (r > 0) {
1664                 if (signal_pending(current)) {
1665                         ++vcpu->stat.signal_exits;
1666                         post_kvm_run_save(vcpu, kvm_run);
1667                         kvm_run->exit_reason = KVM_EXIT_INTR;
1668                         return -EINTR;
1669                 }
1670
1671                 if (dm_request_for_irq_injection(vcpu, kvm_run)) {
1672                         ++vcpu->stat.request_irq_exits;
1673                         post_kvm_run_save(vcpu, kvm_run);
1674                         kvm_run->exit_reason = KVM_EXIT_INTR;
1675                         return -EINTR;
1676                 }
1677                 kvm_resched(vcpu);
1678                 goto again;
1679         }
1680         post_kvm_run_save(vcpu, kvm_run);
1681         return r;
1682 }
1683
1684 static void svm_flush_tlb(struct kvm_vcpu *vcpu)
1685 {
1686         force_new_asid(vcpu);
1687 }
1688
1689 static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
1690 {
1691         vcpu->svm->vmcb->save.cr3 = root;
1692         force_new_asid(vcpu);
1693
1694         if (vcpu->fpu_active) {
1695                 vcpu->svm->vmcb->control.intercept_exceptions |= (1 << NM_VECTOR);
1696                 vcpu->svm->vmcb->save.cr0 |= CR0_TS_MASK;
1697                 vcpu->fpu_active = 0;
1698         }
1699 }
1700
1701 static void svm_inject_page_fault(struct kvm_vcpu *vcpu,
1702                                   unsigned long  addr,
1703                                   uint32_t err_code)
1704 {
1705         uint32_t exit_int_info = vcpu->svm->vmcb->control.exit_int_info;
1706
1707         ++vcpu->stat.pf_guest;
1708
1709         if (is_page_fault(exit_int_info)) {
1710
1711                 vcpu->svm->vmcb->control.event_inj_err = 0;
1712                 vcpu->svm->vmcb->control.event_inj =    SVM_EVTINJ_VALID |
1713                                                         SVM_EVTINJ_VALID_ERR |
1714                                                         SVM_EVTINJ_TYPE_EXEPT |
1715                                                         DF_VECTOR;
1716                 return;
1717         }
1718         vcpu->cr2 = addr;
1719         vcpu->svm->vmcb->save.cr2 = addr;
1720         vcpu->svm->vmcb->control.event_inj =    SVM_EVTINJ_VALID |
1721                                                 SVM_EVTINJ_VALID_ERR |
1722                                                 SVM_EVTINJ_TYPE_EXEPT |
1723                                                 PF_VECTOR;
1724         vcpu->svm->vmcb->control.event_inj_err = err_code;
1725 }
1726
1727
1728 static int is_disabled(void)
1729 {
1730         u64 vm_cr;
1731
1732         rdmsrl(MSR_VM_CR, vm_cr);
1733         if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE))
1734                 return 1;
1735
1736         return 0;
1737 }
1738
1739 static void
1740 svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
1741 {
1742         /*
1743          * Patch in the VMMCALL instruction:
1744          */
1745         hypercall[0] = 0x0f;
1746         hypercall[1] = 0x01;
1747         hypercall[2] = 0xd9;
1748         hypercall[3] = 0xc3;
1749 }
1750
1751 static struct kvm_arch_ops svm_arch_ops = {
1752         .cpu_has_kvm_support = has_svm,
1753         .disabled_by_bios = is_disabled,
1754         .hardware_setup = svm_hardware_setup,
1755         .hardware_unsetup = svm_hardware_unsetup,
1756         .hardware_enable = svm_hardware_enable,
1757         .hardware_disable = svm_hardware_disable,
1758
1759         .vcpu_create = svm_create_vcpu,
1760         .vcpu_free = svm_free_vcpu,
1761
1762         .vcpu_load = svm_vcpu_load,
1763         .vcpu_put = svm_vcpu_put,
1764         .vcpu_decache = svm_vcpu_decache,
1765
1766         .set_guest_debug = svm_guest_debug,
1767         .get_msr = svm_get_msr,
1768         .set_msr = svm_set_msr,
1769         .get_segment_base = svm_get_segment_base,
1770         .get_segment = svm_get_segment,
1771         .set_segment = svm_set_segment,
1772         .get_cs_db_l_bits = svm_get_cs_db_l_bits,
1773         .decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
1774         .set_cr0 = svm_set_cr0,
1775         .set_cr3 = svm_set_cr3,
1776         .set_cr4 = svm_set_cr4,
1777         .set_efer = svm_set_efer,
1778         .get_idt = svm_get_idt,
1779         .set_idt = svm_set_idt,
1780         .get_gdt = svm_get_gdt,
1781         .set_gdt = svm_set_gdt,
1782         .get_dr = svm_get_dr,
1783         .set_dr = svm_set_dr,
1784         .cache_regs = svm_cache_regs,
1785         .decache_regs = svm_decache_regs,
1786         .get_rflags = svm_get_rflags,
1787         .set_rflags = svm_set_rflags,
1788
1789         .invlpg = svm_invlpg,
1790         .tlb_flush = svm_flush_tlb,
1791         .inject_page_fault = svm_inject_page_fault,
1792
1793         .inject_gp = svm_inject_gp,
1794
1795         .run = svm_vcpu_run,
1796         .skip_emulated_instruction = skip_emulated_instruction,
1797         .vcpu_setup = svm_vcpu_setup,
1798         .patch_hypercall = svm_patch_hypercall,
1799 };
1800
1801 static int __init svm_init(void)
1802 {
1803         return kvm_init_arch(&svm_arch_ops, THIS_MODULE);
1804 }
1805
1806 static void __exit svm_exit(void)
1807 {
1808         kvm_exit_arch();
1809 }
1810
1811 module_init(svm_init)
1812 module_exit(svm_exit)