drivers/kvm/x86.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 KVM_X86_H
  12 #define KVM_X86_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
  20 #include <asm/desc.h>
  21
  22 #include "types.h"
  23
  24 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
  25 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
  26 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS|0xFFFFFF0000000000ULL)
  27
  28 #define KVM_GUEST_CR0_MASK \
  29         (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
  30          | X86_CR0_NW | X86_CR0_CD)
  31 #define KVM_VM_CR0_ALWAYS_ON \
  32         (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
  33          | X86_CR0_MP)
  34 #define KVM_GUEST_CR4_MASK \
  35         (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
  36 #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
  37 #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
  38
  39 #define INVALID_PAGE (~(hpa_t)0)
  40 #define UNMAPPED_GVA (~(gpa_t)0)
  41
  42 #define DE_VECTOR 0
  43 #define UD_VECTOR 6
  44 #define NM_VECTOR 7
  45 #define DF_VECTOR 8
  46 #define TS_VECTOR 10
  47 #define NP_VECTOR 11
  48 #define SS_VECTOR 12
  49 #define GP_VECTOR 13
  50 #define PF_VECTOR 14
  51
  52 #define SELECTOR_TI_MASK (1 << 2)
  53 #define SELECTOR_RPL_MASK 0x03
  54
  55 #define IOPL_SHIFT 12
  56
  57 #define KVM_ALIAS_SLOTS 4
  58
  59 #define KVM_PERMILLE_MMU_PAGES 20
  60 #define KVM_MIN_ALLOC_MMU_PAGES 64
  61 #define KVM_NUM_MMU_PAGES 1024
  62 #define KVM_MIN_FREE_MMU_PAGES 5
  63 #define KVM_REFILL_PAGES 25
  64 #define KVM_MAX_CPUID_ENTRIES 40
  65
  66 extern spinlock_t kvm_lock;
  67 extern struct list_head vm_list;
  68
  69 struct kvm_vcpu;
  70 struct kvm;
  71
  72 enum {
  73         VCPU_REGS_RAX = 0,
  74         VCPU_REGS_RCX = 1,
  75         VCPU_REGS_RDX = 2,
  76         VCPU_REGS_RBX = 3,
  77         VCPU_REGS_RSP = 4,
  78         VCPU_REGS_RBP = 5,
  79         VCPU_REGS_RSI = 6,
  80         VCPU_REGS_RDI = 7,
  81 #ifdef CONFIG_X86_64
  82         VCPU_REGS_R8 = 8,
  83         VCPU_REGS_R9 = 9,
  84         VCPU_REGS_R10 = 10,
  85         VCPU_REGS_R11 = 11,
  86         VCPU_REGS_R12 = 12,
  87         VCPU_REGS_R13 = 13,
  88         VCPU_REGS_R14 = 14,
  89         VCPU_REGS_R15 = 15,
  90 #endif
  91         NR_VCPU_REGS
  92 };
  93
  94 enum {
  95         VCPU_SREG_CS,
  96         VCPU_SREG_DS,
  97         VCPU_SREG_ES,
  98         VCPU_SREG_FS,
  99         VCPU_SREG_GS,
 100         VCPU_SREG_SS,
 101         VCPU_SREG_TR,
 102         VCPU_SREG_LDTR,
 103 };
 104
 105 #include "x86_emulate.h"
 106
 107 #define KVM_NR_MEM_OBJS 40
 108
 109 /*
 110  * We don't want allocation failures within the mmu code, so we preallocate
 111  * enough memory for a single page fault in a cache.
 112  */
 113 struct kvm_mmu_memory_cache {
 114         int nobjs;
 115         void *objects[KVM_NR_MEM_OBJS];
 116 };
 117
 118 #define NR_PTE_CHAIN_ENTRIES 5
 119
 120 struct kvm_pte_chain {
 121         u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
 122         struct hlist_node link;
 123 };
 124
 125 /*
 126  * kvm_mmu_page_role, below, is defined as:
 127  *
 128  *   bits 0:3 - total guest paging levels (2-4, or zero for real mode)
 129  *   bits 4:7 - page table level for this shadow (1-4)
 130  *   bits 8:9 - page table quadrant for 2-level guests
 131  *   bit   16 - "metaphysical" - gfn is not a real page (huge page/real mode)
 132  *   bits 17:19 - common access permissions for all ptes in this shadow page
 133  */
 134 union kvm_mmu_page_role {
 135         unsigned word;
 136         struct {
 137                 unsigned glevels : 4;
 138                 unsigned level : 4;
 139                 unsigned quadrant : 2;
 140                 unsigned pad_for_nice_hex_output : 6;
 141                 unsigned metaphysical : 1;
 142                 unsigned access : 3;
 143         };
 144 };
 145
 146 struct kvm_mmu_page {
 147         struct list_head link;
 148         struct hlist_node hash_link;
 149
 150         /*
 151          * The following two entries are used to key the shadow page in the
 152          * hash table.
 153          */
 154         gfn_t gfn;
 155         union kvm_mmu_page_role role;
 156
 157         u64 *spt;
 158         /* hold the gfn of each spte inside spt */
 159         gfn_t *gfns;
 160         unsigned long slot_bitmap; /* One bit set per slot which has memory
 161                                     * in this shadow page.
 162                                     */
 163         int multimapped;         /* More than one parent_pte? */
 164         int root_count;          /* Currently serving as active root */
 165         union {
 166                 u64 *parent_pte;               /* !multimapped */
 167                 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
 168         };
 169 };
 170
 171 /*
 172  * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 173  * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 174  * mode.
 175  */
 176 struct kvm_mmu {
 177         void (*new_cr3)(struct kvm_vcpu *vcpu);
 178         int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
 179         void (*free)(struct kvm_vcpu *vcpu);
 180         gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
 181         void (*prefetch_page)(struct kvm_vcpu *vcpu,
 182                               struct kvm_mmu_page *page);
 183         hpa_t root_hpa;
 184         int root_level;
 185         int shadow_root_level;
 186
 187         u64 *pae_root;
 188 };
 189
 190 struct kvm_vcpu_arch {
 191         u64 host_tsc;
 192         int interrupt_window_open;
 193         unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
 194         DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
 195         unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
 196         unsigned long rip;      /* needs vcpu_load_rsp_rip() */
 197
 198         unsigned long cr0;
 199         unsigned long cr2;
 200         unsigned long cr3;
 201         unsigned long cr4;
 202         unsigned long cr8;
 203         u64 pdptrs[4]; /* pae */
 204         u64 shadow_efer;
 205         u64 apic_base;
 206         struct kvm_lapic *apic;    /* kernel irqchip context */
 207 #define VCPU_MP_STATE_RUNNABLE          0
 208 #define VCPU_MP_STATE_UNINITIALIZED     1
 209 #define VCPU_MP_STATE_INIT_RECEIVED     2
 210 #define VCPU_MP_STATE_SIPI_RECEIVED     3
 211 #define VCPU_MP_STATE_HALTED            4
 212         int mp_state;
 213         int sipi_vector;
 214         u64 ia32_misc_enable_msr;
 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 i387_fxsave_struct host_fx_image;
 228         struct i387_fxsave_struct guest_fx_image;
 229
 230         gva_t mmio_fault_cr2;
 231         struct kvm_pio_request pio;
 232         void *pio_data;
 233
 234         struct kvm_queued_exception {
 235                 bool pending;
 236                 bool has_error_code;
 237                 u8 nr;
 238                 u32 error_code;
 239         } exception;
 240
 241         struct {
 242                 int active;
 243                 u8 save_iopl;
 244                 struct kvm_save_segment {
 245                         u16 selector;
 246                         unsigned long base;
 247                         u32 limit;
 248                         u32 ar;
 249                 } tr, es, ds, fs, gs;
 250         } rmode;
 251         int halt_request; /* real mode on Intel only */
 252
 253         int cpuid_nent;
 254         struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
 255         /* emulate context */
 256
 257         struct x86_emulate_ctxt emulate_ctxt;
 258 };
 259
 260 struct kvm_mem_alias {
 261         gfn_t base_gfn;
 262         unsigned long npages;
 263         gfn_t target_gfn;
 264 };
 265
 266 struct kvm_arch{
 267         int naliases;
 268         struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
 269
 270         unsigned int n_free_mmu_pages;
 271         unsigned int n_requested_mmu_pages;
 272         unsigned int n_alloc_mmu_pages;
 273         struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 274         /*
 275          * Hash table of struct kvm_mmu_page.
 276          */
 277         struct list_head active_mmu_pages;
 278         struct kvm_pic *vpic;
 279         struct kvm_ioapic *vioapic;
 280
 281         int round_robin_prev_vcpu;
 282         unsigned int tss_addr;
 283         struct page *apic_access_page;
 284 };
 285
 286 struct kvm_vcpu_stat {
 287         u32 pf_fixed;
 288         u32 pf_guest;
 289         u32 tlb_flush;
 290         u32 invlpg;
 291
 292         u32 exits;
 293         u32 io_exits;
 294         u32 mmio_exits;
 295         u32 signal_exits;
 296         u32 irq_window_exits;
 297         u32 halt_exits;
 298         u32 halt_wakeup;
 299         u32 request_irq_exits;
 300         u32 irq_exits;
 301         u32 host_state_reload;
 302         u32 efer_reload;
 303         u32 fpu_reload;
 304         u32 insn_emulation;
 305         u32 insn_emulation_fail;
 306 };
 307
 308 struct descriptor_table {
 309         u16 limit;
 310         unsigned long base;
 311 } __attribute__((packed));
 312
 313 struct kvm_x86_ops {
 314         int (*cpu_has_kvm_support)(void);          /* __init */
 315         int (*disabled_by_bios)(void);             /* __init */
 316         void (*hardware_enable)(void *dummy);      /* __init */
 317         void (*hardware_disable)(void *dummy);
 318         void (*check_processor_compatibility)(void *rtn);
 319         int (*hardware_setup)(void);               /* __init */
 320         void (*hardware_unsetup)(void);            /* __exit */
 321
 322         /* Create, but do not attach this VCPU */
 323         struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
 324         void (*vcpu_free)(struct kvm_vcpu *vcpu);
 325         int (*vcpu_reset)(struct kvm_vcpu *vcpu);
 326
 327         void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
 328         void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
 329         void (*vcpu_put)(struct kvm_vcpu *vcpu);
 330         void (*vcpu_decache)(struct kvm_vcpu *vcpu);
 331
 332         int (*set_guest_debug)(struct kvm_vcpu *vcpu,
 333                                struct kvm_debug_guest *dbg);
 334         void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
 335         int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
 336         int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 337         u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
 338         void (*get_segment)(struct kvm_vcpu *vcpu,
 339                             struct kvm_segment *var, int seg);
 340         void (*set_segment)(struct kvm_vcpu *vcpu,
 341                             struct kvm_segment *var, int seg);
 342         void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
 343         void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
 344         void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
 345         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 346         void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
 347         void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
 348         void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 349         void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 350         void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 351         void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 352         unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
 353         void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
 354                        int *exception);
 355         void (*cache_regs)(struct kvm_vcpu *vcpu);
 356         void (*decache_regs)(struct kvm_vcpu *vcpu);
 357         unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
 358         void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
 359
 360         void (*tlb_flush)(struct kvm_vcpu *vcpu);
 361
 362         void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
 363         int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
 364         void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
 365         void (*patch_hypercall)(struct kvm_vcpu *vcpu,
 366                                 unsigned char *hypercall_addr);
 367         int (*get_irq)(struct kvm_vcpu *vcpu);
 368         void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
 369         void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
 370                                 bool has_error_code, u32 error_code);
 371         bool (*exception_injected)(struct kvm_vcpu *vcpu);
 372         void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
 373         void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
 374                                        struct kvm_run *run);
 375
 376         int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
 377 };
 378
 379 extern struct kvm_x86_ops *kvm_x86_ops;
 380
 381 int kvm_mmu_module_init(void);
 382 void kvm_mmu_module_exit(void);
 383
 384 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 385 int kvm_mmu_create(struct kvm_vcpu *vcpu);
 386 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 387 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
 388
 389 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 390 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
 391 void kvm_mmu_zap_all(struct kvm *kvm);
 392 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
 393 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
 394
 395 enum emulation_result {
 396         EMULATE_DONE,       /* no further processing */
 397         EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
 398         EMULATE_FAIL,         /* can't emulate this instruction */
 399 };
 400
 401 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
 402                         unsigned long cr2, u16 error_code, int no_decode);
 403 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
 404 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 405 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 406 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
 407                    unsigned long *rflags);
 408
 409 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
 410 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
 411                      unsigned long *rflags);
 412 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
 413 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 414
 415 struct x86_emulate_ctxt;
 416
 417 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 418                      int size, unsigned port);
 419 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 420                            int size, unsigned long count, int down,
 421                             gva_t address, int rep, unsigned port);
 422 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
 423 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
 424 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
 425 int emulate_clts(struct kvm_vcpu *vcpu);
 426 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
 427                     unsigned long *dest);
 428 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
 429                     unsigned long value);
 430
 431 void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 432 void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
 433 void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
 434 void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
 435 unsigned long get_cr8(struct kvm_vcpu *vcpu);
 436 void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 437 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
 438
 439 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 440 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 441
 442 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 443 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 444 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
 445                            u32 error_code);
 446
 447 void fx_init(struct kvm_vcpu *vcpu);
 448
 449 int emulator_read_std(unsigned long addr,
 450                       void *val,
 451                       unsigned int bytes,
 452                       struct kvm_vcpu *vcpu);
 453 int emulator_write_emulated(unsigned long addr,
 454                             const void *val,
 455                             unsigned int bytes,
 456                             struct kvm_vcpu *vcpu);
 457
 458 unsigned long segment_base(u16 selector);
 459
 460 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
 461 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 462                        const u8 *new, int bytes);
 463 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 464 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 465 int kvm_mmu_load(struct kvm_vcpu *vcpu);
 466 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
 467
 468 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
 469
 470 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
 471
 472 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
 473
 474 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 475 int complete_pio(struct kvm_vcpu *vcpu);
 476
 477 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
 478 {
 479         struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
 480
 481         return (struct kvm_mmu_page *)page_private(page);
 482 }
 483
 484 static inline u16 read_fs(void)
 485 {
 486         u16 seg;
 487         asm("mov %%fs, %0" : "=g"(seg));
 488         return seg;
 489 }
 490
 491 static inline u16 read_gs(void)
 492 {
 493         u16 seg;
 494         asm("mov %%gs, %0" : "=g"(seg));
 495         return seg;
 496 }
 497
 498 static inline u16 read_ldt(void)
 499 {
 500         u16 ldt;
 501         asm("sldt %0" : "=g"(ldt));
 502         return ldt;
 503 }
 504
 505 static inline void load_fs(u16 sel)
 506 {
 507         asm("mov %0, %%fs" : : "rm"(sel));
 508 }
 509
 510 static inline void load_gs(u16 sel)
 511 {
 512         asm("mov %0, %%gs" : : "rm"(sel));
 513 }
 514
 515 #ifndef load_ldt
 516 static inline void load_ldt(u16 sel)
 517 {
 518         asm("lldt %0" : : "rm"(sel));
 519 }
 520 #endif
 521
 522 static inline void get_idt(struct descriptor_table *table)
 523 {
 524         asm("sidt %0" : "=m"(*table));
 525 }
 526
 527 static inline void get_gdt(struct descriptor_table *table)
 528 {
 529         asm("sgdt %0" : "=m"(*table));
 530 }
 531
 532 static inline unsigned long read_tr_base(void)
 533 {
 534         u16 tr;
 535         asm("str %0" : "=g"(tr));
 536         return segment_base(tr);
 537 }
 538
 539 #ifdef CONFIG_X86_64
 540 static inline unsigned long read_msr(unsigned long msr)
 541 {
 542         u64 value;
 543
 544         rdmsrl(msr, value);
 545         return value;
 546 }
 547 #endif
 548
 549 static inline void fx_save(struct i387_fxsave_struct *image)
 550 {
 551         asm("fxsave (%0)":: "r" (image));
 552 }
 553
 554 static inline void fx_restore(struct i387_fxsave_struct *image)
 555 {
 556         asm("fxrstor (%0)":: "r" (image));
 557 }
 558
 559 static inline void fpu_init(void)
 560 {
 561         asm("finit");
 562 }
 563
 564 static inline u32 get_rdx_init_val(void)
 565 {
 566         return 0x600; /* P6 family */
 567 }
 568
 569 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
 570 {
 571         kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
 572 }
 573
 574 #define ASM_VMX_VMCLEAR_RAX       ".byte 0x66, 0x0f, 0xc7, 0x30"
 575 #define ASM_VMX_VMLAUNCH          ".byte 0x0f, 0x01, 0xc2"
 576 #define ASM_VMX_VMRESUME          ".byte 0x0f, 0x01, 0xc3"
 577 #define ASM_VMX_VMPTRLD_RAX       ".byte 0x0f, 0xc7, 0x30"
 578 #define ASM_VMX_VMREAD_RDX_RAX    ".byte 0x0f, 0x78, 0xd0"
 579 #define ASM_VMX_VMWRITE_RAX_RDX   ".byte 0x0f, 0x79, 0xd0"
 580 #define ASM_VMX_VMWRITE_RSP_RDX   ".byte 0x0f, 0x79, 0xd4"
 581 #define ASM_VMX_VMXOFF            ".byte 0x0f, 0x01, 0xc4"
 582 #define ASM_VMX_VMXON_RAX         ".byte 0xf3, 0x0f, 0xc7, 0x30"
 583
 584 #define MSR_IA32_TIME_STAMP_COUNTER             0x010
 585
 586 #define TSS_IOPB_BASE_OFFSET 0x66
 587 #define TSS_BASE_SIZE 0x68
 588 #define TSS_IOPB_SIZE (65536 / 8)
 589 #define TSS_REDIRECTION_SIZE (256 / 8)
 590 #define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
 591
 592 #endif