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_X86__KVM_HOST_H
  12 #define ASM_X86__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/pvclock-abi.h>
  22 #include <asm/desc.h>
  23
  24 #define KVM_MAX_VCPUS 16
  25 #define KVM_MEMORY_SLOTS 32
  26 /* memory slots that does not exposed to userspace */
  27 #define KVM_PRIVATE_MEM_SLOTS 4
  28
  29 #define KVM_PIO_PAGE_OFFSET 1
  30 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2
  31
  32 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
  33 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
  34 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS |    \
  35                                   0xFFFFFF0000000000ULL)
  36
  37 #define KVM_GUEST_CR0_MASK                                 \
  38         (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
  39          | X86_CR0_NW | X86_CR0_CD)
  40 #define KVM_VM_CR0_ALWAYS_ON                                            \
  41         (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
  42          | X86_CR0_MP)
  43 #define KVM_GUEST_CR4_MASK                                              \
  44         (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
  45 #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
  46 #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
  47
  48 #define INVALID_PAGE (~(hpa_t)0)
  49 #define UNMAPPED_GVA (~(gpa_t)0)
  50
  51 /* shadow tables are PAE even on non-PAE hosts */
  52 #define KVM_HPAGE_SHIFT 21
  53 #define KVM_HPAGE_SIZE (1UL << KVM_HPAGE_SHIFT)
  54 #define KVM_HPAGE_MASK (~(KVM_HPAGE_SIZE - 1))
  55
  56 #define KVM_PAGES_PER_HPAGE (KVM_HPAGE_SIZE / PAGE_SIZE)
  57
  58 #define DE_VECTOR 0
  59 #define UD_VECTOR 6
  60 #define NM_VECTOR 7
  61 #define DF_VECTOR 8
  62 #define TS_VECTOR 10
  63 #define NP_VECTOR 11
  64 #define SS_VECTOR 12
  65 #define GP_VECTOR 13
  66 #define PF_VECTOR 14
  67 #define MC_VECTOR 18
  68
  69 #define SELECTOR_TI_MASK (1 << 2)
  70 #define SELECTOR_RPL_MASK 0x03
  71
  72 #define IOPL_SHIFT 12
  73
  74 #define KVM_ALIAS_SLOTS 4
  75
  76 #define KVM_PERMILLE_MMU_PAGES 20
  77 #define KVM_MIN_ALLOC_MMU_PAGES 64
  78 #define KVM_MMU_HASH_SHIFT 10
  79 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
  80 #define KVM_MIN_FREE_MMU_PAGES 5
  81 #define KVM_REFILL_PAGES 25
  82 #define KVM_MAX_CPUID_ENTRIES 40
  83 #define KVM_NR_VAR_MTRR 8
  84
  85 extern spinlock_t kvm_lock;
  86 extern struct list_head vm_list;
  87
  88 struct kvm_vcpu;
  89 struct kvm;
  90
  91 enum {
  92         VCPU_REGS_RAX = 0,
  93         VCPU_REGS_RCX = 1,
  94         VCPU_REGS_RDX = 2,
  95         VCPU_REGS_RBX = 3,
  96         VCPU_REGS_RSP = 4,
  97         VCPU_REGS_RBP = 5,
  98         VCPU_REGS_RSI = 6,
  99         VCPU_REGS_RDI = 7,
 100 #ifdef CONFIG_X86_64
 101         VCPU_REGS_R8 = 8,
 102         VCPU_REGS_R9 = 9,
 103         VCPU_REGS_R10 = 10,
 104         VCPU_REGS_R11 = 11,
 105         VCPU_REGS_R12 = 12,
 106         VCPU_REGS_R13 = 13,
 107         VCPU_REGS_R14 = 14,
 108         VCPU_REGS_R15 = 15,
 109 #endif
 110         NR_VCPU_REGS
 111 };
 112
 113 enum {
 114         VCPU_SREG_ES,
 115         VCPU_SREG_CS,
 116         VCPU_SREG_SS,
 117         VCPU_SREG_DS,
 118         VCPU_SREG_FS,
 119         VCPU_SREG_GS,
 120         VCPU_SREG_TR,
 121         VCPU_SREG_LDTR,
 122 };
 123
 124 #include <asm/kvm_x86_emulate.h>
 125
 126 #define KVM_NR_MEM_OBJS 40
 127
 128 struct kvm_guest_debug {
 129         int enabled;
 130         unsigned long bp[4];
 131         int singlestep;
 132 };
 133
 134 /*
 135  * We don't want allocation failures within the mmu code, so we preallocate
 136  * enough memory for a single page fault in a cache.
 137  */
 138 struct kvm_mmu_memory_cache {
 139         int nobjs;
 140         void *objects[KVM_NR_MEM_OBJS];
 141 };
 142
 143 #define NR_PTE_CHAIN_ENTRIES 5
 144
 145 struct kvm_pte_chain {
 146         u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
 147         struct hlist_node link;
 148 };
 149
 150 /*
 151  * kvm_mmu_page_role, below, is defined as:
 152  *
 153  *   bits 0:3 - total guest paging levels (2-4, or zero for real mode)
 154  *   bits 4:7 - page table level for this shadow (1-4)
 155  *   bits 8:9 - page table quadrant for 2-level guests
 156  *   bit   16 - "metaphysical" - gfn is not a real page (huge page/real mode)
 157  *   bits 17:19 - common access permissions for all ptes in this shadow page
 158  */
 159 union kvm_mmu_page_role {
 160         unsigned word;
 161         struct {
 162                 unsigned glevels:4;
 163                 unsigned level:4;
 164                 unsigned quadrant:2;
 165                 unsigned pad_for_nice_hex_output:6;
 166                 unsigned metaphysical:1;
 167                 unsigned access:3;
 168                 unsigned invalid:1;
 169         };
 170 };
 171
 172 struct kvm_mmu_page {
 173         struct list_head link;
 174         struct hlist_node hash_link;
 175
 176         /*
 177          * The following two entries are used to key the shadow page in the
 178          * hash table.
 179          */
 180         gfn_t gfn;
 181         union kvm_mmu_page_role role;
 182
 183         u64 *spt;
 184         /* hold the gfn of each spte inside spt */
 185         gfn_t *gfns;
 186         unsigned long slot_bitmap; /* One bit set per slot which has memory
 187                                     * in this shadow page.
 188                                     */
 189         int multimapped;         /* More than one parent_pte? */
 190         int root_count;          /* Currently serving as active root */
 191         union {
 192                 u64 *parent_pte;               /* !multimapped */
 193                 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
 194         };
 195 };
 196
 197 /*
 198  * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 199  * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 200  * mode.
 201  */
 202 struct kvm_mmu {
 203         void (*new_cr3)(struct kvm_vcpu *vcpu);
 204         int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
 205         void (*free)(struct kvm_vcpu *vcpu);
 206         gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
 207         void (*prefetch_page)(struct kvm_vcpu *vcpu,
 208                               struct kvm_mmu_page *page);
 209         hpa_t root_hpa;
 210         int root_level;
 211         int shadow_root_level;
 212
 213         u64 *pae_root;
 214 };
 215
 216 struct kvm_vcpu_arch {
 217         u64 host_tsc;
 218         int interrupt_window_open;
 219         unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
 220         DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
 221         unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
 222         unsigned long rip;      /* needs vcpu_load_rsp_rip() */
 223
 224         unsigned long cr0;
 225         unsigned long cr2;
 226         unsigned long cr3;
 227         unsigned long cr4;
 228         unsigned long cr8;
 229         u64 pdptrs[4]; /* pae */
 230         u64 shadow_efer;
 231         u64 apic_base;
 232         struct kvm_lapic *apic;    /* kernel irqchip context */
 233         int mp_state;
 234         int sipi_vector;
 235         u64 ia32_misc_enable_msr;
 236         bool tpr_access_reporting;
 237
 238         struct kvm_mmu mmu;
 239
 240         struct kvm_mmu_memory_cache mmu_pte_chain_cache;
 241         struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
 242         struct kvm_mmu_memory_cache mmu_page_cache;
 243         struct kvm_mmu_memory_cache mmu_page_header_cache;
 244
 245         gfn_t last_pt_write_gfn;
 246         int   last_pt_write_count;
 247         u64  *last_pte_updated;
 248         gfn_t last_pte_gfn;
 249
 250         struct {
 251                 gfn_t gfn;      /* presumed gfn during guest pte update */
 252                 pfn_t pfn;      /* pfn corresponding to that gfn */
 253                 int largepage;
 254         } update_pte;
 255
 256         struct i387_fxsave_struct host_fx_image;
 257         struct i387_fxsave_struct guest_fx_image;
 258
 259         gva_t mmio_fault_cr2;
 260         struct kvm_pio_request pio;
 261         void *pio_data;
 262
 263         struct kvm_queued_exception {
 264                 bool pending;
 265                 bool has_error_code;
 266                 u8 nr;
 267                 u32 error_code;
 268         } exception;
 269
 270         struct {
 271                 int active;
 272                 u8 save_iopl;
 273                 struct kvm_save_segment {
 274                         u16 selector;
 275                         unsigned long base;
 276                         u32 limit;
 277                         u32 ar;
 278                 } tr, es, ds, fs, gs;
 279         } rmode;
 280         int halt_request; /* real mode on Intel only */
 281
 282         int cpuid_nent;
 283         struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
 284         /* emulate context */
 285
 286         struct x86_emulate_ctxt emulate_ctxt;
 287
 288         gpa_t time;
 289         struct pvclock_vcpu_time_info hv_clock;
 290         unsigned int hv_clock_tsc_khz;
 291         unsigned int time_offset;
 292         struct page *time_page;
 293
 294         bool nmi_pending;
 295
 296         u64 mtrr[0x100];
 297 };
 298
 299 struct kvm_mem_alias {
 300         gfn_t base_gfn;
 301         unsigned long npages;
 302         gfn_t target_gfn;
 303 };
 304
 305 struct kvm_arch{
 306         int naliases;
 307         struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
 308
 309         unsigned int n_free_mmu_pages;
 310         unsigned int n_requested_mmu_pages;
 311         unsigned int n_alloc_mmu_pages;
 312         struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 313         /*
 314          * Hash table of struct kvm_mmu_page.
 315          */
 316         struct list_head active_mmu_pages;
 317         struct kvm_pic *vpic;
 318         struct kvm_ioapic *vioapic;
 319         struct kvm_pit *vpit;
 320
 321         int round_robin_prev_vcpu;
 322         unsigned int tss_addr;
 323         struct page *apic_access_page;
 324
 325         gpa_t wall_clock;
 326
 327         struct page *ept_identity_pagetable;
 328         bool ept_identity_pagetable_done;
 329 };
 330
 331 struct kvm_vm_stat {
 332         u32 mmu_shadow_zapped;
 333         u32 mmu_pte_write;
 334         u32 mmu_pte_updated;
 335         u32 mmu_pde_zapped;
 336         u32 mmu_flooded;
 337         u32 mmu_recycled;
 338         u32 mmu_cache_miss;
 339         u32 remote_tlb_flush;
 340         u32 lpages;
 341 };
 342
 343 struct kvm_vcpu_stat {
 344         u32 pf_fixed;
 345         u32 pf_guest;
 346         u32 tlb_flush;
 347         u32 invlpg;
 348
 349         u32 exits;
 350         u32 io_exits;
 351         u32 mmio_exits;
 352         u32 signal_exits;
 353         u32 irq_window_exits;
 354         u32 nmi_window_exits;
 355         u32 halt_exits;
 356         u32 halt_wakeup;
 357         u32 request_irq_exits;
 358         u32 irq_exits;
 359         u32 host_state_reload;
 360         u32 efer_reload;
 361         u32 fpu_reload;
 362         u32 insn_emulation;
 363         u32 insn_emulation_fail;
 364         u32 hypercalls;
 365 };
 366
 367 struct descriptor_table {
 368         u16 limit;
 369         unsigned long base;
 370 } __attribute__((packed));
 371
 372 struct kvm_x86_ops {
 373         int (*cpu_has_kvm_support)(void);          /* __init */
 374         int (*disabled_by_bios)(void);             /* __init */
 375         void (*hardware_enable)(void *dummy);      /* __init */
 376         void (*hardware_disable)(void *dummy);
 377         void (*check_processor_compatibility)(void *rtn);
 378         int (*hardware_setup)(void);               /* __init */
 379         void (*hardware_unsetup)(void);            /* __exit */
 380         bool (*cpu_has_accelerated_tpr)(void);
 381
 382         /* Create, but do not attach this VCPU */
 383         struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
 384         void (*vcpu_free)(struct kvm_vcpu *vcpu);
 385         int (*vcpu_reset)(struct kvm_vcpu *vcpu);
 386
 387         void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
 388         void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
 389         void (*vcpu_put)(struct kvm_vcpu *vcpu);
 390
 391         int (*set_guest_debug)(struct kvm_vcpu *vcpu,
 392                                struct kvm_debug_guest *dbg);
 393         void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
 394         int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
 395         int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 396         u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
 397         void (*get_segment)(struct kvm_vcpu *vcpu,
 398                             struct kvm_segment *var, int seg);
 399         int (*get_cpl)(struct kvm_vcpu *vcpu);
 400         void (*set_segment)(struct kvm_vcpu *vcpu,
 401                             struct kvm_segment *var, int seg);
 402         void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
 403         void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
 404         void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
 405         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 406         void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
 407         void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
 408         void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 409         void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 410         void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 411         void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 412         unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
 413         void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
 414                        int *exception);
 415         void (*cache_regs)(struct kvm_vcpu *vcpu);
 416         void (*decache_regs)(struct kvm_vcpu *vcpu);
 417         unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
 418         void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
 419
 420         void (*tlb_flush)(struct kvm_vcpu *vcpu);
 421
 422         void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
 423         int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
 424         void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
 425         void (*patch_hypercall)(struct kvm_vcpu *vcpu,
 426                                 unsigned char *hypercall_addr);
 427         int (*get_irq)(struct kvm_vcpu *vcpu);
 428         void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
 429         void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
 430                                 bool has_error_code, u32 error_code);
 431         bool (*exception_injected)(struct kvm_vcpu *vcpu);
 432         void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
 433         void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
 434                                        struct kvm_run *run);
 435
 436         int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
 437         int (*get_tdp_level)(void);
 438 };
 439
 440 extern struct kvm_x86_ops *kvm_x86_ops;
 441
 442 int kvm_mmu_module_init(void);
 443 void kvm_mmu_module_exit(void);
 444
 445 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 446 int kvm_mmu_create(struct kvm_vcpu *vcpu);
 447 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 448 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
 449 void kvm_mmu_set_base_ptes(u64 base_pte);
 450 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
 451                 u64 dirty_mask, u64 nx_mask, u64 x_mask);
 452
 453 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 454 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
 455 void kvm_mmu_zap_all(struct kvm *kvm);
 456 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
 457 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
 458
 459 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 460
 461 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
 462                           const void *val, int bytes);
 463 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
 464                   gpa_t addr, unsigned long *ret);
 465
 466 extern bool tdp_enabled;
 467
 468 enum emulation_result {
 469         EMULATE_DONE,       /* no further processing */
 470         EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
 471         EMULATE_FAIL,         /* can't emulate this instruction */
 472 };
 473
 474 #define EMULTYPE_NO_DECODE          (1 << 0)
 475 #define EMULTYPE_TRAP_UD            (1 << 1)
 476 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
 477                         unsigned long cr2, u16 error_code, int emulation_type);
 478 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
 479 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 480 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 481 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
 482                    unsigned long *rflags);
 483
 484 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
 485 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
 486                      unsigned long *rflags);
 487 void kvm_enable_efer_bits(u64);
 488 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
 489 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 490
 491 struct x86_emulate_ctxt;
 492
 493 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 494                      int size, unsigned port);
 495 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 496                            int size, unsigned long count, int down,
 497                             gva_t address, int rep, unsigned port);
 498 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
 499 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
 500 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
 501 int emulate_clts(struct kvm_vcpu *vcpu);
 502 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
 503                     unsigned long *dest);
 504 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
 505                     unsigned long value);
 506
 507 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
 508 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
 509                                 int type_bits, int seg);
 510
 511 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason);
 512
 513 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 514 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
 515 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
 516 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
 517 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
 518 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 519 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
 520
 521 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 522 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 523
 524 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 525 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 526 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
 527                            u32 error_code);
 528
 529 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
 530
 531 void fx_init(struct kvm_vcpu *vcpu);
 532
 533 int emulator_read_std(unsigned long addr,
 534                       void *val,
 535                       unsigned int bytes,
 536                       struct kvm_vcpu *vcpu);
 537 int emulator_write_emulated(unsigned long addr,
 538                             const void *val,
 539                             unsigned int bytes,
 540                             struct kvm_vcpu *vcpu);
 541
 542 unsigned long segment_base(u16 selector);
 543
 544 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
 545 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 546                        const u8 *new, int bytes);
 547 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 548 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 549 int kvm_mmu_load(struct kvm_vcpu *vcpu);
 550 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
 551
 552 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
 553
 554 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
 555
 556 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
 557
 558 void kvm_enable_tdp(void);
 559
 560 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 561 int complete_pio(struct kvm_vcpu *vcpu);
 562
 563 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
 564 {
 565         struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
 566
 567         return (struct kvm_mmu_page *)page_private(page);
 568 }
 569
 570 static inline u16 kvm_read_fs(void)
 571 {
 572         u16 seg;
 573         asm("mov %%fs, %0" : "=g"(seg));
 574         return seg;
 575 }
 576
 577 static inline u16 kvm_read_gs(void)
 578 {
 579         u16 seg;
 580         asm("mov %%gs, %0" : "=g"(seg));
 581         return seg;
 582 }
 583
 584 static inline u16 kvm_read_ldt(void)
 585 {
 586         u16 ldt;
 587         asm("sldt %0" : "=g"(ldt));
 588         return ldt;
 589 }
 590
 591 static inline void kvm_load_fs(u16 sel)
 592 {
 593         asm("mov %0, %%fs" : : "rm"(sel));
 594 }
 595
 596 static inline void kvm_load_gs(u16 sel)
 597 {
 598         asm("mov %0, %%gs" : : "rm"(sel));
 599 }
 600
 601 static inline void kvm_load_ldt(u16 sel)
 602 {
 603         asm("lldt %0" : : "rm"(sel));
 604 }
 605
 606 static inline void kvm_get_idt(struct descriptor_table *table)
 607 {
 608         asm("sidt %0" : "=m"(*table));
 609 }
 610
 611 static inline void kvm_get_gdt(struct descriptor_table *table)
 612 {
 613         asm("sgdt %0" : "=m"(*table));
 614 }
 615
 616 static inline unsigned long kvm_read_tr_base(void)
 617 {
 618         u16 tr;
 619         asm("str %0" : "=g"(tr));
 620         return segment_base(tr);
 621 }
 622
 623 #ifdef CONFIG_X86_64
 624 static inline unsigned long read_msr(unsigned long msr)
 625 {
 626         u64 value;
 627
 628         rdmsrl(msr, value);
 629         return value;
 630 }
 631 #endif
 632
 633 static inline void kvm_fx_save(struct i387_fxsave_struct *image)
 634 {
 635         asm("fxsave (%0)":: "r" (image));
 636 }
 637
 638 static inline void kvm_fx_restore(struct i387_fxsave_struct *image)
 639 {
 640         asm("fxrstor (%0)":: "r" (image));
 641 }
 642
 643 static inline void kvm_fx_finit(void)
 644 {
 645         asm("finit");
 646 }
 647
 648 static inline u32 get_rdx_init_val(void)
 649 {
 650         return 0x600; /* P6 family */
 651 }
 652
 653 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
 654 {
 655         kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
 656 }
 657
 658 #define ASM_VMX_VMCLEAR_RAX       ".byte 0x66, 0x0f, 0xc7, 0x30"
 659 #define ASM_VMX_VMLAUNCH          ".byte 0x0f, 0x01, 0xc2"
 660 #define ASM_VMX_VMRESUME          ".byte 0x0f, 0x01, 0xc3"
 661 #define ASM_VMX_VMPTRLD_RAX       ".byte 0x0f, 0xc7, 0x30"
 662 #define ASM_VMX_VMREAD_RDX_RAX    ".byte 0x0f, 0x78, 0xd0"
 663 #define ASM_VMX_VMWRITE_RAX_RDX   ".byte 0x0f, 0x79, 0xd0"
 664 #define ASM_VMX_VMWRITE_RSP_RDX   ".byte 0x0f, 0x79, 0xd4"
 665 #define ASM_VMX_VMXOFF            ".byte 0x0f, 0x01, 0xc4"
 666 #define ASM_VMX_VMXON_RAX         ".byte 0xf3, 0x0f, 0xc7, 0x30"
 667 #define ASM_VMX_INVEPT            ".byte 0x66, 0x0f, 0x38, 0x80, 0x08"
 668 #define ASM_VMX_INVVPID           ".byte 0x66, 0x0f, 0x38, 0x81, 0x08"
 669
 670 #define MSR_IA32_TIME_STAMP_COUNTER             0x010
 671
 672 #define TSS_IOPB_BASE_OFFSET 0x66
 673 #define TSS_BASE_SIZE 0x68
 674 #define TSS_IOPB_SIZE (65536 / 8)
 675 #define TSS_REDIRECTION_SIZE (256 / 8)
 676 #define RMODE_TSS_SIZE                                                  \
 677         (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
 678
 679 enum {
 680         TASK_SWITCH_CALL = 0,
 681         TASK_SWITCH_IRET = 1,
 682         TASK_SWITCH_JMP = 2,
 683         TASK_SWITCH_GATE = 3,
 684 };
 685
 686 #define KVMTRACE_5D(evt, vcpu, d1, d2, d3, d4, d5, name) \
 687         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 688                                                 vcpu, 5, d1, d2, d3, d4, d5)
 689 #define KVMTRACE_4D(evt, vcpu, d1, d2, d3, d4, name) \
 690         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 691                                                 vcpu, 4, d1, d2, d3, d4, 0)
 692 #define KVMTRACE_3D(evt, vcpu, d1, d2, d3, name) \
 693         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 694                                                 vcpu, 3, d1, d2, d3, 0, 0)
 695 #define KVMTRACE_2D(evt, vcpu, d1, d2, name) \
 696         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 697                                                 vcpu, 2, d1, d2, 0, 0, 0)
 698 #define KVMTRACE_1D(evt, vcpu, d1, name) \
 699         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 700                                                 vcpu, 1, d1, 0, 0, 0, 0)
 701 #define KVMTRACE_0D(evt, vcpu, name) \
 702         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 703                                                 vcpu, 0, 0, 0, 0, 0, 0)
 704
 705 #ifdef CONFIG_64BIT
 706 # define KVM_EX_ENTRY ".quad"
 707 # define KVM_EX_PUSH "pushq"
 708 #else
 709 # define KVM_EX_ENTRY ".long"
 710 # define KVM_EX_PUSH "pushl"
 711 #endif
 712
 713 /*
 714  * Hardware virtualization extension instructions may fault if a
 715  * reboot turns off virtualization while processes are running.
 716  * Trap the fault and ignore the instruction if that happens.
 717  */
 718 asmlinkage void kvm_handle_fault_on_reboot(void);
 719
 720 #define __kvm_handle_fault_on_reboot(insn) \
 721         "666: " insn "\n\t" \
 722         ".pushsection .text.fixup, \"ax\" \n" \
 723         "667: \n\t" \
 724         KVM_EX_PUSH " $666b \n\t" \
 725         "jmp kvm_handle_fault_on_reboot \n\t" \
 726         ".popsection \n\t" \
 727         ".pushsection __ex_table, \"a\" \n\t" \
 728         KVM_EX_ENTRY " 666b, 667b \n\t" \
 729         ".popsection"
 730
 731 #endif /* ASM_X86__KVM_HOST_H */