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 |    \
  26                                   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 /* shadow tables are PAE even on non-PAE hosts */
  43 #define KVM_HPAGE_SHIFT 21
  44 #define KVM_HPAGE_SIZE (1UL << KVM_HPAGE_SHIFT)
  45 #define KVM_HPAGE_MASK (~(KVM_HPAGE_SIZE - 1))
  46
  47 #define KVM_PAGES_PER_HPAGE (KVM_HPAGE_SIZE / PAGE_SIZE)
  48
  49 #define DE_VECTOR 0
  50 #define UD_VECTOR 6
  51 #define NM_VECTOR 7
  52 #define DF_VECTOR 8
  53 #define TS_VECTOR 10
  54 #define NP_VECTOR 11
  55 #define SS_VECTOR 12
  56 #define GP_VECTOR 13
  57 #define PF_VECTOR 14
  58
  59 #define SELECTOR_TI_MASK (1 << 2)
  60 #define SELECTOR_RPL_MASK 0x03
  61
  62 #define IOPL_SHIFT 12
  63
  64 #define KVM_ALIAS_SLOTS 4
  65
  66 #define KVM_PERMILLE_MMU_PAGES 20
  67 #define KVM_MIN_ALLOC_MMU_PAGES 64
  68 #define KVM_MMU_HASH_SHIFT 10
  69 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
  70 #define KVM_MIN_FREE_MMU_PAGES 5
  71 #define KVM_REFILL_PAGES 25
  72 #define KVM_MAX_CPUID_ENTRIES 40
  73
  74 extern spinlock_t kvm_lock;
  75 extern struct list_head vm_list;
  76
  77 struct kvm_vcpu;
  78 struct kvm;
  79
  80 enum {
  81         VCPU_REGS_RAX = 0,
  82         VCPU_REGS_RCX = 1,
  83         VCPU_REGS_RDX = 2,
  84         VCPU_REGS_RBX = 3,
  85         VCPU_REGS_RSP = 4,
  86         VCPU_REGS_RBP = 5,
  87         VCPU_REGS_RSI = 6,
  88         VCPU_REGS_RDI = 7,
  89 #ifdef CONFIG_X86_64
  90         VCPU_REGS_R8 = 8,
  91         VCPU_REGS_R9 = 9,
  92         VCPU_REGS_R10 = 10,
  93         VCPU_REGS_R11 = 11,
  94         VCPU_REGS_R12 = 12,
  95         VCPU_REGS_R13 = 13,
  96         VCPU_REGS_R14 = 14,
  97         VCPU_REGS_R15 = 15,
  98 #endif
  99         NR_VCPU_REGS
 100 };
 101
 102 enum {
 103         VCPU_SREG_CS,
 104         VCPU_SREG_DS,
 105         VCPU_SREG_ES,
 106         VCPU_SREG_FS,
 107         VCPU_SREG_GS,
 108         VCPU_SREG_SS,
 109         VCPU_SREG_TR,
 110         VCPU_SREG_LDTR,
 111 };
 112
 113 #include <asm/kvm_x86_emulate.h>
 114
 115 #define KVM_NR_MEM_OBJS 40
 116
 117 /*
 118  * We don't want allocation failures within the mmu code, so we preallocate
 119  * enough memory for a single page fault in a cache.
 120  */
 121 struct kvm_mmu_memory_cache {
 122         int nobjs;
 123         void *objects[KVM_NR_MEM_OBJS];
 124 };
 125
 126 #define NR_PTE_CHAIN_ENTRIES 5
 127
 128 struct kvm_pte_chain {
 129         u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
 130         struct hlist_node link;
 131 };
 132
 133 /*
 134  * kvm_mmu_page_role, below, is defined as:
 135  *
 136  *   bits 0:3 - total guest paging levels (2-4, or zero for real mode)
 137  *   bits 4:7 - page table level for this shadow (1-4)
 138  *   bits 8:9 - page table quadrant for 2-level guests
 139  *   bit   16 - "metaphysical" - gfn is not a real page (huge page/real mode)
 140  *   bits 17:19 - common access permissions for all ptes in this shadow page
 141  */
 142 union kvm_mmu_page_role {
 143         unsigned word;
 144         struct {
 145                 unsigned glevels:4;
 146                 unsigned level:4;
 147                 unsigned quadrant:2;
 148                 unsigned pad_for_nice_hex_output:6;
 149                 unsigned metaphysical:1;
 150                 unsigned access:3;
 151                 unsigned invalid:1;
 152         };
 153 };
 154
 155 struct kvm_mmu_page {
 156         struct list_head link;
 157         struct hlist_node hash_link;
 158
 159         /*
 160          * The following two entries are used to key the shadow page in the
 161          * hash table.
 162          */
 163         gfn_t gfn;
 164         union kvm_mmu_page_role role;
 165
 166         u64 *spt;
 167         /* hold the gfn of each spte inside spt */
 168         gfn_t *gfns;
 169         unsigned long slot_bitmap; /* One bit set per slot which has memory
 170                                     * in this shadow page.
 171                                     */
 172         int multimapped;         /* More than one parent_pte? */
 173         int root_count;          /* Currently serving as active root */
 174         union {
 175                 u64 *parent_pte;               /* !multimapped */
 176                 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
 177         };
 178 };
 179
 180 /*
 181  * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 182  * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 183  * mode.
 184  */
 185 struct kvm_mmu {
 186         void (*new_cr3)(struct kvm_vcpu *vcpu);
 187         int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
 188         void (*free)(struct kvm_vcpu *vcpu);
 189         gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
 190         void (*prefetch_page)(struct kvm_vcpu *vcpu,
 191                               struct kvm_mmu_page *page);
 192         hpa_t root_hpa;
 193         int root_level;
 194         int shadow_root_level;
 195
 196         u64 *pae_root;
 197 };
 198
 199 struct kvm_vcpu_arch {
 200         u64 host_tsc;
 201         int interrupt_window_open;
 202         unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
 203         DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
 204         unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
 205         unsigned long rip;      /* needs vcpu_load_rsp_rip() */
 206
 207         unsigned long cr0;
 208         unsigned long cr2;
 209         unsigned long cr3;
 210         unsigned long cr4;
 211         unsigned long cr8;
 212         u64 pdptrs[4]; /* pae */
 213         u64 shadow_efer;
 214         u64 apic_base;
 215         struct kvm_lapic *apic;    /* kernel irqchip context */
 216 #define VCPU_MP_STATE_RUNNABLE          0
 217 #define VCPU_MP_STATE_UNINITIALIZED     1
 218 #define VCPU_MP_STATE_INIT_RECEIVED     2
 219 #define VCPU_MP_STATE_SIPI_RECEIVED     3
 220 #define VCPU_MP_STATE_HALTED            4
 221         int mp_state;
 222         int sipi_vector;
 223         u64 ia32_misc_enable_msr;
 224         bool tpr_access_reporting;
 225
 226         struct kvm_mmu mmu;
 227
 228         struct kvm_mmu_memory_cache mmu_pte_chain_cache;
 229         struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
 230         struct kvm_mmu_memory_cache mmu_page_cache;
 231         struct kvm_mmu_memory_cache mmu_page_header_cache;
 232
 233         gfn_t last_pt_write_gfn;
 234         int   last_pt_write_count;
 235         u64  *last_pte_updated;
 236
 237         struct {
 238                 gfn_t gfn;          /* presumed gfn during guest pte update */
 239                 struct page *page;  /* page corresponding to that gfn */
 240                 int largepage;
 241         } update_pte;
 242
 243         struct i387_fxsave_struct host_fx_image;
 244         struct i387_fxsave_struct guest_fx_image;
 245
 246         gva_t mmio_fault_cr2;
 247         struct kvm_pio_request pio;
 248         void *pio_data;
 249
 250         struct kvm_queued_exception {
 251                 bool pending;
 252                 bool has_error_code;
 253                 u8 nr;
 254                 u32 error_code;
 255         } exception;
 256
 257         struct {
 258                 int active;
 259                 u8 save_iopl;
 260                 struct kvm_save_segment {
 261                         u16 selector;
 262                         unsigned long base;
 263                         u32 limit;
 264                         u32 ar;
 265                 } tr, es, ds, fs, gs;
 266         } rmode;
 267         int halt_request; /* real mode on Intel only */
 268
 269         int cpuid_nent;
 270         struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
 271         /* emulate context */
 272
 273         struct x86_emulate_ctxt emulate_ctxt;
 274
 275         gpa_t time;
 276         struct kvm_vcpu_time_info hv_clock;
 277         unsigned int time_offset;
 278         struct page *time_page;
 279 };
 280
 281 struct kvm_mem_alias {
 282         gfn_t base_gfn;
 283         unsigned long npages;
 284         gfn_t target_gfn;
 285 };
 286
 287 struct kvm_arch{
 288         int naliases;
 289         struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
 290
 291         unsigned int n_free_mmu_pages;
 292         unsigned int n_requested_mmu_pages;
 293         unsigned int n_alloc_mmu_pages;
 294         struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 295         /*
 296          * Hash table of struct kvm_mmu_page.
 297          */
 298         struct list_head active_mmu_pages;
 299         struct kvm_pic *vpic;
 300         struct kvm_ioapic *vioapic;
 301         struct kvm_pit *vpit;
 302
 303         int round_robin_prev_vcpu;
 304         unsigned int tss_addr;
 305         struct page *apic_access_page;
 306
 307         gpa_t wall_clock;
 308 };
 309
 310 struct kvm_vm_stat {
 311         u32 mmu_shadow_zapped;
 312         u32 mmu_pte_write;
 313         u32 mmu_pte_updated;
 314         u32 mmu_pde_zapped;
 315         u32 mmu_flooded;
 316         u32 mmu_recycled;
 317         u32 mmu_cache_miss;
 318         u32 remote_tlb_flush;
 319         u32 lpages;
 320 };
 321
 322 struct kvm_vcpu_stat {
 323         u32 pf_fixed;
 324         u32 pf_guest;
 325         u32 tlb_flush;
 326         u32 invlpg;
 327
 328         u32 exits;
 329         u32 io_exits;
 330         u32 mmio_exits;
 331         u32 signal_exits;
 332         u32 irq_window_exits;
 333         u32 halt_exits;
 334         u32 halt_wakeup;
 335         u32 request_irq_exits;
 336         u32 irq_exits;
 337         u32 host_state_reload;
 338         u32 efer_reload;
 339         u32 fpu_reload;
 340         u32 insn_emulation;
 341         u32 insn_emulation_fail;
 342         u32 hypercalls;
 343 };
 344
 345 struct descriptor_table {
 346         u16 limit;
 347         unsigned long base;
 348 } __attribute__((packed));
 349
 350 struct kvm_x86_ops {
 351         int (*cpu_has_kvm_support)(void);          /* __init */
 352         int (*disabled_by_bios)(void);             /* __init */
 353         void (*hardware_enable)(void *dummy);      /* __init */
 354         void (*hardware_disable)(void *dummy);
 355         void (*check_processor_compatibility)(void *rtn);
 356         int (*hardware_setup)(void);               /* __init */
 357         void (*hardware_unsetup)(void);            /* __exit */
 358         bool (*cpu_has_accelerated_tpr)(void);
 359
 360         /* Create, but do not attach this VCPU */
 361         struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
 362         void (*vcpu_free)(struct kvm_vcpu *vcpu);
 363         int (*vcpu_reset)(struct kvm_vcpu *vcpu);
 364
 365         void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
 366         void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
 367         void (*vcpu_put)(struct kvm_vcpu *vcpu);
 368         void (*vcpu_decache)(struct kvm_vcpu *vcpu);
 369
 370         int (*set_guest_debug)(struct kvm_vcpu *vcpu,
 371                                struct kvm_debug_guest *dbg);
 372         void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
 373         int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
 374         int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 375         u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
 376         void (*get_segment)(struct kvm_vcpu *vcpu,
 377                             struct kvm_segment *var, int seg);
 378         void (*set_segment)(struct kvm_vcpu *vcpu,
 379                             struct kvm_segment *var, int seg);
 380         void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
 381         void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
 382         void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
 383         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 384         void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
 385         void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
 386         void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 387         void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 388         void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 389         void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 390         unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
 391         void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
 392                        int *exception);
 393         void (*cache_regs)(struct kvm_vcpu *vcpu);
 394         void (*decache_regs)(struct kvm_vcpu *vcpu);
 395         unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
 396         void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
 397
 398         void (*tlb_flush)(struct kvm_vcpu *vcpu);
 399
 400         void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
 401         int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
 402         void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
 403         void (*patch_hypercall)(struct kvm_vcpu *vcpu,
 404                                 unsigned char *hypercall_addr);
 405         int (*get_irq)(struct kvm_vcpu *vcpu);
 406         void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
 407         void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
 408                                 bool has_error_code, u32 error_code);
 409         bool (*exception_injected)(struct kvm_vcpu *vcpu);
 410         void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
 411         void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
 412                                        struct kvm_run *run);
 413
 414         int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
 415 };
 416
 417 extern struct kvm_x86_ops *kvm_x86_ops;
 418
 419 int kvm_mmu_module_init(void);
 420 void kvm_mmu_module_exit(void);
 421
 422 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 423 int kvm_mmu_create(struct kvm_vcpu *vcpu);
 424 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 425 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
 426
 427 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 428 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
 429 void kvm_mmu_zap_all(struct kvm *kvm);
 430 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
 431 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
 432
 433 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 434
 435 int __emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
 436                           const void *val, int bytes);
 437 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
 438                   gpa_t addr, unsigned long *ret);
 439
 440 extern bool tdp_enabled;
 441
 442 enum emulation_result {
 443         EMULATE_DONE,       /* no further processing */
 444         EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
 445         EMULATE_FAIL,         /* can't emulate this instruction */
 446 };
 447
 448 #define EMULTYPE_NO_DECODE          (1 << 0)
 449 #define EMULTYPE_TRAP_UD            (1 << 1)
 450 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
 451                         unsigned long cr2, u16 error_code, int emulation_type);
 452 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
 453 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 454 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 455 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
 456                    unsigned long *rflags);
 457
 458 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
 459 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
 460                      unsigned long *rflags);
 461 void kvm_enable_efer_bits(u64);
 462 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
 463 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 464
 465 struct x86_emulate_ctxt;
 466
 467 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 468                      int size, unsigned port);
 469 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 470                            int size, unsigned long count, int down,
 471                             gva_t address, int rep, unsigned port);
 472 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
 473 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
 474 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
 475 int emulate_clts(struct kvm_vcpu *vcpu);
 476 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
 477                     unsigned long *dest);
 478 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
 479                     unsigned long value);
 480
 481 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 482 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
 483 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
 484 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
 485 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
 486 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 487 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
 488
 489 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 490 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 491
 492 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 493 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 494 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
 495                            u32 error_code);
 496
 497 void fx_init(struct kvm_vcpu *vcpu);
 498
 499 int emulator_read_std(unsigned long addr,
 500                       void *val,
 501                       unsigned int bytes,
 502                       struct kvm_vcpu *vcpu);
 503 int emulator_write_emulated(unsigned long addr,
 504                             const void *val,
 505                             unsigned int bytes,
 506                             struct kvm_vcpu *vcpu);
 507
 508 unsigned long segment_base(u16 selector);
 509
 510 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
 511 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 512                        const u8 *new, int bytes);
 513 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 514 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 515 int kvm_mmu_load(struct kvm_vcpu *vcpu);
 516 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
 517
 518 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
 519
 520 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
 521
 522 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
 523
 524 void kvm_enable_tdp(void);
 525
 526 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 527 int complete_pio(struct kvm_vcpu *vcpu);
 528
 529 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
 530 {
 531         struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
 532
 533         return (struct kvm_mmu_page *)page_private(page);
 534 }
 535
 536 static inline u16 read_fs(void)
 537 {
 538         u16 seg;
 539         asm("mov %%fs, %0" : "=g"(seg));
 540         return seg;
 541 }
 542
 543 static inline u16 read_gs(void)
 544 {
 545         u16 seg;
 546         asm("mov %%gs, %0" : "=g"(seg));
 547         return seg;
 548 }
 549
 550 static inline u16 read_ldt(void)
 551 {
 552         u16 ldt;
 553         asm("sldt %0" : "=g"(ldt));
 554         return ldt;
 555 }
 556
 557 static inline void load_fs(u16 sel)
 558 {
 559         asm("mov %0, %%fs" : : "rm"(sel));
 560 }
 561
 562 static inline void load_gs(u16 sel)
 563 {
 564         asm("mov %0, %%gs" : : "rm"(sel));
 565 }
 566
 567 #ifndef load_ldt
 568 static inline void load_ldt(u16 sel)
 569 {
 570         asm("lldt %0" : : "rm"(sel));
 571 }
 572 #endif
 573
 574 static inline void get_idt(struct descriptor_table *table)
 575 {
 576         asm("sidt %0" : "=m"(*table));
 577 }
 578
 579 static inline void get_gdt(struct descriptor_table *table)
 580 {
 581         asm("sgdt %0" : "=m"(*table));
 582 }
 583
 584 static inline unsigned long read_tr_base(void)
 585 {
 586         u16 tr;
 587         asm("str %0" : "=g"(tr));
 588         return segment_base(tr);
 589 }
 590
 591 #ifdef CONFIG_X86_64
 592 static inline unsigned long read_msr(unsigned long msr)
 593 {
 594         u64 value;
 595
 596         rdmsrl(msr, value);
 597         return value;
 598 }
 599 #endif
 600
 601 static inline void fx_save(struct i387_fxsave_struct *image)
 602 {
 603         asm("fxsave (%0)":: "r" (image));
 604 }
 605
 606 static inline void fx_restore(struct i387_fxsave_struct *image)
 607 {
 608         asm("fxrstor (%0)":: "r" (image));
 609 }
 610
 611 static inline void fpu_init(void)
 612 {
 613         asm("finit");
 614 }
 615
 616 static inline u32 get_rdx_init_val(void)
 617 {
 618         return 0x600; /* P6 family */
 619 }
 620
 621 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
 622 {
 623         kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
 624 }
 625
 626 #define ASM_VMX_VMCLEAR_RAX       ".byte 0x66, 0x0f, 0xc7, 0x30"
 627 #define ASM_VMX_VMLAUNCH          ".byte 0x0f, 0x01, 0xc2"
 628 #define ASM_VMX_VMRESUME          ".byte 0x0f, 0x01, 0xc3"
 629 #define ASM_VMX_VMPTRLD_RAX       ".byte 0x0f, 0xc7, 0x30"
 630 #define ASM_VMX_VMREAD_RDX_RAX    ".byte 0x0f, 0x78, 0xd0"
 631 #define ASM_VMX_VMWRITE_RAX_RDX   ".byte 0x0f, 0x79, 0xd0"
 632 #define ASM_VMX_VMWRITE_RSP_RDX   ".byte 0x0f, 0x79, 0xd4"
 633 #define ASM_VMX_VMXOFF            ".byte 0x0f, 0x01, 0xc4"
 634 #define ASM_VMX_VMXON_RAX         ".byte 0xf3, 0x0f, 0xc7, 0x30"
 635 #define ASM_VMX_INVVPID           ".byte 0x66, 0x0f, 0x38, 0x81, 0x08"
 636
 637 #define MSR_IA32_TIME_STAMP_COUNTER             0x010
 638
 639 #define TSS_IOPB_BASE_OFFSET 0x66
 640 #define TSS_BASE_SIZE 0x68
 641 #define TSS_IOPB_SIZE (65536 / 8)
 642 #define TSS_REDIRECTION_SIZE (256 / 8)
 643 #define RMODE_TSS_SIZE                                                  \
 644         (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
 645
 646 #endif