include/asm-x86/kvm_host.h

   1 #/*
   2  * Kernel-based Virtual Machine driver for Linux
   3  *
   4  * This header defines architecture specific interfaces, x86 version
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2.  See
   7  * the COPYING file in the top-level directory.
   8  *
   9  */
  10
  11 #ifndef ASM_KVM_HOST_H
  12 #define ASM_KVM_HOST_H
  13
  14 #include <linux/types.h>
  15 #include <linux/mm.h>
  16
  17 #include <linux/kvm.h>
  18 #include <linux/kvm_para.h>
  19 #include <linux/kvm_types.h>
  20
  21 #include <asm/desc.h>
  22
  23 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
  24 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
  25 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS|0xFFFFFF0000000000ULL)
  26
  27 #define KVM_GUEST_CR0_MASK \
  28         (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
  29          | X86_CR0_NW | X86_CR0_CD)
  30 #define KVM_VM_CR0_ALWAYS_ON \
  31         (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
  32          | X86_CR0_MP)
  33 #define KVM_GUEST_CR4_MASK \
  34         (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
  35 #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
  36 #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
  37
  38 #define INVALID_PAGE (~(hpa_t)0)
  39 #define UNMAPPED_GVA (~(gpa_t)0)
  40
  41 #define DE_VECTOR 0
  42 #define UD_VECTOR 6
  43 #define NM_VECTOR 7
  44 #define DF_VECTOR 8
  45 #define TS_VECTOR 10
  46 #define NP_VECTOR 11
  47 #define SS_VECTOR 12
  48 #define GP_VECTOR 13
  49 #define PF_VECTOR 14
  50
  51 #define SELECTOR_TI_MASK (1 << 2)
  52 #define SELECTOR_RPL_MASK 0x03
  53
  54 #define IOPL_SHIFT 12
  55
  56 #define KVM_ALIAS_SLOTS 4
  57
  58 #define KVM_PERMILLE_MMU_PAGES 20
  59 #define KVM_MIN_ALLOC_MMU_PAGES 64
  60 #define KVM_NUM_MMU_PAGES 1024
  61 #define KVM_MIN_FREE_MMU_PAGES 5
  62 #define KVM_REFILL_PAGES 25
  63 #define KVM_MAX_CPUID_ENTRIES 40
  64
  65 extern spinlock_t kvm_lock;
  66 extern struct list_head vm_list;
  67
  68 struct kvm_vcpu;
  69 struct kvm;
  70
  71 enum {
  72         VCPU_REGS_RAX = 0,
  73         VCPU_REGS_RCX = 1,
  74         VCPU_REGS_RDX = 2,
  75         VCPU_REGS_RBX = 3,
  76         VCPU_REGS_RSP = 4,
  77         VCPU_REGS_RBP = 5,
  78         VCPU_REGS_RSI = 6,
  79         VCPU_REGS_RDI = 7,
  80 #ifdef CONFIG_X86_64
  81         VCPU_REGS_R8 = 8,
  82         VCPU_REGS_R9 = 9,
  83         VCPU_REGS_R10 = 10,
  84         VCPU_REGS_R11 = 11,
  85         VCPU_REGS_R12 = 12,
  86         VCPU_REGS_R13 = 13,
  87         VCPU_REGS_R14 = 14,
  88         VCPU_REGS_R15 = 15,
  89 #endif
  90         NR_VCPU_REGS
  91 };
  92
  93 enum {
  94         VCPU_SREG_CS,
  95         VCPU_SREG_DS,
  96         VCPU_SREG_ES,
  97         VCPU_SREG_FS,
  98         VCPU_SREG_GS,
  99         VCPU_SREG_SS,
 100         VCPU_SREG_TR,
 101         VCPU_SREG_LDTR,
 102 };
 103
 104 #include <asm/kvm_x86_emulate.h>
 105
 106 #define KVM_NR_MEM_OBJS 40
 107
 108 /*
 109  * We don't want allocation failures within the mmu code, so we preallocate
 110  * enough memory for a single page fault in a cache.
 111  */
 112 struct kvm_mmu_memory_cache {
 113         int nobjs;
 114         void *objects[KVM_NR_MEM_OBJS];
 115 };
 116
 117 #define NR_PTE_CHAIN_ENTRIES 5
 118
 119 struct kvm_pte_chain {
 120         u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
 121         struct hlist_node link;
 122 };
 123
 124 /*
 125  * kvm_mmu_page_role, below, is defined as:
 126  *
 127  *   bits 0:3 - total guest paging levels (2-4, or zero for real mode)
 128  *   bits 4:7 - page table level for this shadow (1-4)
 129  *   bits 8:9 - page table quadrant for 2-level guests
 130  *   bit   16 - "metaphysical" - gfn is not a real page (huge page/real mode)
 131  *   bits 17:19 - common access permissions for all ptes in this shadow page
 132  */
 133 union kvm_mmu_page_role {
 134         unsigned word;
 135         struct {
 136                 unsigned glevels : 4;
 137                 unsigned level : 4;
 138                 unsigned quadrant : 2;
 139                 unsigned pad_for_nice_hex_output : 6;
 140                 unsigned metaphysical : 1;
 141                 unsigned access : 3;
 142         };
 143 };
 144
 145 struct kvm_mmu_page {
 146         struct list_head link;
 147         struct hlist_node hash_link;
 148
 149         /*
 150          * The following two entries are used to key the shadow page in the
 151          * hash table.
 152          */
 153         gfn_t gfn;
 154         union kvm_mmu_page_role role;
 155
 156         u64 *spt;
 157         /* hold the gfn of each spte inside spt */
 158         gfn_t *gfns;
 159         unsigned long slot_bitmap; /* One bit set per slot which has memory
 160                                     * in this shadow page.
 161                                     */
 162         int multimapped;         /* More than one parent_pte? */
 163         int root_count;          /* Currently serving as active root */
 164         union {
 165                 u64 *parent_pte;               /* !multimapped */
 166                 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
 167         };
 168 };
 169
 170 /*
 171  * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 172  * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 173  * mode.
 174  */
 175 struct kvm_mmu {
 176         void (*new_cr3)(struct kvm_vcpu *vcpu);
 177         int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
 178         void (*free)(struct kvm_vcpu *vcpu);
 179         gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
 180         void (*prefetch_page)(struct kvm_vcpu *vcpu,
 181                               struct kvm_mmu_page *page);
 182         hpa_t root_hpa;
 183         int root_level;
 184         int shadow_root_level;
 185
 186         u64 *pae_root;
 187 };
 188
 189 struct kvm_vcpu_arch {
 190         u64 host_tsc;
 191         int interrupt_window_open;
 192         unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
 193         DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
 194         unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
 195         unsigned long rip;      /* needs vcpu_load_rsp_rip() */
 196
 197         unsigned long cr0;
 198         unsigned long cr2;
 199         unsigned long cr3;
 200         unsigned long cr4;
 201         unsigned long cr8;
 202         u64 pdptrs[4]; /* pae */
 203         u64 shadow_efer;
 204         u64 apic_base;
 205         struct kvm_lapic *apic;    /* kernel irqchip context */
 206 #define VCPU_MP_STATE_RUNNABLE          0
 207 #define VCPU_MP_STATE_UNINITIALIZED     1
 208 #define VCPU_MP_STATE_INIT_RECEIVED     2
 209 #define VCPU_MP_STATE_SIPI_RECEIVED     3
 210 #define VCPU_MP_STATE_HALTED            4
 211         int mp_state;
 212         int sipi_vector;
 213         u64 ia32_misc_enable_msr;
 214         bool tpr_access_reporting;
 215
 216         struct kvm_mmu mmu;
 217
 218         struct kvm_mmu_memory_cache mmu_pte_chain_cache;
 219         struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
 220         struct kvm_mmu_memory_cache mmu_page_cache;
 221         struct kvm_mmu_memory_cache mmu_page_header_cache;
 222
 223         gfn_t last_pt_write_gfn;
 224         int   last_pt_write_count;
 225         u64  *last_pte_updated;
 226
 227         struct {
 228                 gfn_t gfn;          /* presumed gfn during guest pte update */
 229                 struct page *page;  /* page corresponding to that gfn */
 230         } update_pte;
 231
 232         struct i387_fxsave_struct host_fx_image;
 233         struct i387_fxsave_struct guest_fx_image;
 234
 235         gva_t mmio_fault_cr2;
 236         struct kvm_pio_request pio;
 237         void *pio_data;
 238
 239         struct kvm_queued_exception {
 240                 bool pending;
 241                 bool has_error_code;
 242                 u8 nr;
 243                 u32 error_code;
 244         } exception;
 245
 246         struct {
 247                 int active;
 248                 u8 save_iopl;
 249                 struct kvm_save_segment {
 250                         u16 selector;
 251                         unsigned long base;
 252                         u32 limit;
 253                         u32 ar;
 254                 } tr, es, ds, fs, gs;
 255         } rmode;
 256         int halt_request; /* real mode on Intel only */
 257
 258         int cpuid_nent;
 259         struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
 260         /* emulate context */
 261
 262         struct x86_emulate_ctxt emulate_ctxt;
 263 };
 264
 265 struct kvm_mem_alias {
 266         gfn_t base_gfn;
 267         unsigned long npages;
 268         gfn_t target_gfn;
 269 };
 270
 271 struct kvm_arch{
 272         int naliases;
 273         struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
 274
 275         unsigned int n_free_mmu_pages;
 276         unsigned int n_requested_mmu_pages;
 277         unsigned int n_alloc_mmu_pages;
 278         struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 279         /*
 280          * Hash table of struct kvm_mmu_page.
 281          */
 282         struct list_head active_mmu_pages;
 283         struct kvm_pic *vpic;
 284         struct kvm_ioapic *vioapic;
 285
 286         int round_robin_prev_vcpu;
 287         unsigned int tss_addr;
 288         struct page *apic_access_page;
 289 };
 290
 291 struct kvm_vm_stat {
 292         u32 mmu_shadow_zapped;
 293         u32 mmu_pte_write;
 294         u32 mmu_pte_updated;
 295         u32 mmu_pde_zapped;
 296         u32 mmu_flooded;
 297         u32 mmu_recycled;
 298         u32 mmu_cache_miss;
 299         u32 remote_tlb_flush;
 300 };
 301
 302 struct kvm_vcpu_stat {
 303         u32 pf_fixed;
 304         u32 pf_guest;
 305         u32 tlb_flush;
 306         u32 invlpg;
 307
 308         u32 exits;
 309         u32 io_exits;
 310         u32 mmio_exits;
 311         u32 signal_exits;
 312         u32 irq_window_exits;
 313         u32 halt_exits;
 314         u32 halt_wakeup;
 315         u32 request_irq_exits;
 316         u32 irq_exits;
 317         u32 host_state_reload;
 318         u32 efer_reload;
 319         u32 fpu_reload;
 320         u32 insn_emulation;
 321         u32 insn_emulation_fail;
 322 };
 323
 324 struct descriptor_table {
 325         u16 limit;
 326         unsigned long base;
 327 } __attribute__((packed));
 328
 329 struct kvm_x86_ops {
 330         int (*cpu_has_kvm_support)(void);          /* __init */
 331         int (*disabled_by_bios)(void);             /* __init */
 332         void (*hardware_enable)(void *dummy);      /* __init */
 333         void (*hardware_disable)(void *dummy);
 334         void (*check_processor_compatibility)(void *rtn);
 335         int (*hardware_setup)(void);               /* __init */
 336         void (*hardware_unsetup)(void);            /* __exit */
 337         bool (*cpu_has_accelerated_tpr)(void);
 338
 339         /* Create, but do not attach this VCPU */
 340         struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
 341         void (*vcpu_free)(struct kvm_vcpu *vcpu);
 342         int (*vcpu_reset)(struct kvm_vcpu *vcpu);
 343
 344         void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
 345         void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
 346         void (*vcpu_put)(struct kvm_vcpu *vcpu);
 347         void (*vcpu_decache)(struct kvm_vcpu *vcpu);
 348
 349         int (*set_guest_debug)(struct kvm_vcpu *vcpu,
 350                                struct kvm_debug_guest *dbg);
 351         void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
 352         int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
 353         int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 354         u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
 355         void (*get_segment)(struct kvm_vcpu *vcpu,
 356                             struct kvm_segment *var, int seg);
 357         void (*set_segment)(struct kvm_vcpu *vcpu,
 358                             struct kvm_segment *var, int seg);
 359         void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
 360         void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
 361         void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
 362         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 363         void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
 364         void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
 365         void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 366         void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 367         void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 368         void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 369         unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
 370         void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
 371                        int *exception);
 372         void (*cache_regs)(struct kvm_vcpu *vcpu);
 373         void (*decache_regs)(struct kvm_vcpu *vcpu);
 374         unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
 375         void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
 376
 377         void (*tlb_flush)(struct kvm_vcpu *vcpu);
 378
 379         void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
 380         int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
 381         void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
 382         void (*patch_hypercall)(struct kvm_vcpu *vcpu,
 383                                 unsigned char *hypercall_addr);
 384         int (*get_irq)(struct kvm_vcpu *vcpu);
 385         void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
 386         void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
 387                                 bool has_error_code, u32 error_code);
 388         bool (*exception_injected)(struct kvm_vcpu *vcpu);
 389         void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
 390         void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
 391                                        struct kvm_run *run);
 392
 393         int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
 394 };
 395
 396 extern struct kvm_x86_ops *kvm_x86_ops;
 397
 398 int kvm_mmu_module_init(void);
 399 void kvm_mmu_module_exit(void);
 400
 401 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 402 int kvm_mmu_create(struct kvm_vcpu *vcpu);
 403 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 404 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
 405
 406 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 407 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
 408 void kvm_mmu_zap_all(struct kvm *kvm);
 409 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
 410 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
 411
 412 enum emulation_result {
 413         EMULATE_DONE,       /* no further processing */
 414         EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
 415         EMULATE_FAIL,         /* can't emulate this instruction */
 416 };
 417
 418 #define EMULTYPE_NO_DECODE          (1 << 0)
 419 #define EMULTYPE_TRAP_UD            (1 << 1)
 420 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
 421                         unsigned long cr2, u16 error_code, int emulation_type);
 422 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
 423 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 424 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 425 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
 426                    unsigned long *rflags);
 427
 428 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
 429 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
 430                      unsigned long *rflags);
 431 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
 432 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 433
 434 struct x86_emulate_ctxt;
 435
 436 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 437                      int size, unsigned port);
 438 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 439                            int size, unsigned long count, int down,
 440                             gva_t address, int rep, unsigned port);
 441 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
 442 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
 443 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
 444 int emulate_clts(struct kvm_vcpu *vcpu);
 445 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
 446                     unsigned long *dest);
 447 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
 448                     unsigned long value);
 449
 450 void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 451 void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
 452 void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
 453 void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
 454 unsigned long get_cr8(struct kvm_vcpu *vcpu);
 455 void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 456 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
 457
 458 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 459 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 460
 461 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 462 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 463 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
 464                            u32 error_code);
 465
 466 void fx_init(struct kvm_vcpu *vcpu);
 467
 468 int emulator_read_std(unsigned long addr,
 469                       void *val,
 470                       unsigned int bytes,
 471                       struct kvm_vcpu *vcpu);
 472 int emulator_write_emulated(unsigned long addr,
 473                             const void *val,
 474                             unsigned int bytes,
 475                             struct kvm_vcpu *vcpu);
 476
 477 unsigned long segment_base(u16 selector);
 478
 479 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
 480 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 481                        const u8 *new, int bytes);
 482 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 483 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 484 int kvm_mmu_load(struct kvm_vcpu *vcpu);
 485 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
 486
 487 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
 488
 489 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
 490
 491 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
 492
 493 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 494 int complete_pio(struct kvm_vcpu *vcpu);
 495
 496 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
 497 {
 498         struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
 499
 500         return (struct kvm_mmu_page *)page_private(page);
 501 }
 502
 503 static inline u16 read_fs(void)
 504 {
 505         u16 seg;
 506         asm("mov %%fs, %0" : "=g"(seg));
 507         return seg;
 508 }
 509
 510 static inline u16 read_gs(void)
 511 {
 512         u16 seg;
 513         asm("mov %%gs, %0" : "=g"(seg));
 514         return seg;
 515 }
 516
 517 static inline u16 read_ldt(void)
 518 {
 519         u16 ldt;
 520         asm("sldt %0" : "=g"(ldt));
 521         return ldt;
 522 }
 523
 524 static inline void load_fs(u16 sel)
 525 {
 526         asm("mov %0, %%fs" : : "rm"(sel));
 527 }
 528
 529 static inline void load_gs(u16 sel)
 530 {
 531         asm("mov %0, %%gs" : : "rm"(sel));
 532 }
 533
 534 #ifndef load_ldt
 535 static inline void load_ldt(u16 sel)
 536 {
 537         asm("lldt %0" : : "rm"(sel));
 538 }
 539 #endif
 540
 541 static inline void get_idt(struct descriptor_table *table)
 542 {
 543         asm("sidt %0" : "=m"(*table));
 544 }
 545
 546 static inline void get_gdt(struct descriptor_table *table)
 547 {
 548         asm("sgdt %0" : "=m"(*table));
 549 }
 550
 551 static inline unsigned long read_tr_base(void)
 552 {
 553         u16 tr;
 554         asm("str %0" : "=g"(tr));
 555         return segment_base(tr);
 556 }
 557
 558 #ifdef CONFIG_X86_64
 559 static inline unsigned long read_msr(unsigned long msr)
 560 {
 561         u64 value;
 562
 563         rdmsrl(msr, value);
 564         return value;
 565 }
 566 #endif
 567
 568 static inline void fx_save(struct i387_fxsave_struct *image)
 569 {
 570         asm("fxsave (%0)":: "r" (image));
 571 }
 572
 573 static inline void fx_restore(struct i387_fxsave_struct *image)
 574 {
 575         asm("fxrstor (%0)":: "r" (image));
 576 }
 577
 578 static inline void fpu_init(void)
 579 {
 580         asm("finit");
 581 }
 582
 583 static inline u32 get_rdx_init_val(void)
 584 {
 585         return 0x600; /* P6 family */
 586 }
 587
 588 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
 589 {
 590         kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
 591 }
 592
 593 #define ASM_VMX_VMCLEAR_RAX       ".byte 0x66, 0x0f, 0xc7, 0x30"
 594 #define ASM_VMX_VMLAUNCH          ".byte 0x0f, 0x01, 0xc2"
 595 #define ASM_VMX_VMRESUME          ".byte 0x0f, 0x01, 0xc3"
 596 #define ASM_VMX_VMPTRLD_RAX       ".byte 0x0f, 0xc7, 0x30"
 597 #define ASM_VMX_VMREAD_RDX_RAX    ".byte 0x0f, 0x78, 0xd0"
 598 #define ASM_VMX_VMWRITE_RAX_RDX   ".byte 0x0f, 0x79, 0xd0"
 599 #define ASM_VMX_VMWRITE_RSP_RDX   ".byte 0x0f, 0x79, 0xd4"
 600 #define ASM_VMX_VMXOFF            ".byte 0x0f, 0x01, 0xc4"
 601 #define ASM_VMX_VMXON_RAX         ".byte 0xf3, 0x0f, 0xc7, 0x30"
 602
 603 #define MSR_IA32_TIME_STAMP_COUNTER             0x010
 604
 605 #define TSS_IOPB_BASE_OFFSET 0x66
 606 #define TSS_BASE_SIZE 0x68
 607 #define TSS_IOPB_SIZE (65536 / 8)
 608 #define TSS_REDIRECTION_SIZE (256 / 8)
 609 #define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
 610
 611 #endif