arch/x86/include/asm/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 #include <linux/mmu_notifier.h>
  17
  18 #include <linux/kvm.h>
  19 #include <linux/kvm_para.h>
  20 #include <linux/kvm_types.h>
  21
  22 #include <asm/pvclock-abi.h>
  23 #include <asm/desc.h>
  24 #include <asm/mtrr.h>
  25
  26 #define KVM_MAX_VCPUS 16
  27 #define KVM_MEMORY_SLOTS 32
  28 /* memory slots that does not exposed to userspace */
  29 #define KVM_PRIVATE_MEM_SLOTS 4
  30
  31 #define KVM_PIO_PAGE_OFFSET 1
  32 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2
  33
  34 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
  35 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
  36 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS |    \
  37                                   0xFFFFFF0000000000ULL)
  38
  39 #define KVM_GUEST_CR0_MASK                                 \
  40         (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
  41          | X86_CR0_NW | X86_CR0_CD)
  42 #define KVM_VM_CR0_ALWAYS_ON                                            \
  43         (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
  44          | X86_CR0_MP)
  45 #define KVM_GUEST_CR4_MASK                                              \
  46         (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
  47 #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
  48 #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
  49
  50 #define INVALID_PAGE (~(hpa_t)0)
  51 #define UNMAPPED_GVA (~(gpa_t)0)
  52
  53 /* shadow tables are PAE even on non-PAE hosts */
  54 #define KVM_HPAGE_SHIFT 21
  55 #define KVM_HPAGE_SIZE (1UL << KVM_HPAGE_SHIFT)
  56 #define KVM_HPAGE_MASK (~(KVM_HPAGE_SIZE - 1))
  57
  58 #define KVM_PAGES_PER_HPAGE (KVM_HPAGE_SIZE / PAGE_SIZE)
  59
  60 #define DE_VECTOR 0
  61 #define DB_VECTOR 1
  62 #define BP_VECTOR 3
  63 #define OF_VECTOR 4
  64 #define BR_VECTOR 5
  65 #define UD_VECTOR 6
  66 #define NM_VECTOR 7
  67 #define DF_VECTOR 8
  68 #define TS_VECTOR 10
  69 #define NP_VECTOR 11
  70 #define SS_VECTOR 12
  71 #define GP_VECTOR 13
  72 #define PF_VECTOR 14
  73 #define MF_VECTOR 16
  74 #define MC_VECTOR 18
  75
  76 #define SELECTOR_TI_MASK (1 << 2)
  77 #define SELECTOR_RPL_MASK 0x03
  78
  79 #define IOPL_SHIFT 12
  80
  81 #define KVM_ALIAS_SLOTS 4
  82
  83 #define KVM_PERMILLE_MMU_PAGES 20
  84 #define KVM_MIN_ALLOC_MMU_PAGES 64
  85 #define KVM_MMU_HASH_SHIFT 10
  86 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
  87 #define KVM_MIN_FREE_MMU_PAGES 5
  88 #define KVM_REFILL_PAGES 25
  89 #define KVM_MAX_CPUID_ENTRIES 40
  90 #define KVM_NR_FIXED_MTRR_REGION 88
  91 #define KVM_NR_VAR_MTRR 8
  92
  93 extern spinlock_t kvm_lock;
  94 extern struct list_head vm_list;
  95
  96 struct kvm_vcpu;
  97 struct kvm;
  98
  99 enum kvm_reg {
 100         VCPU_REGS_RAX = 0,
 101         VCPU_REGS_RCX = 1,
 102         VCPU_REGS_RDX = 2,
 103         VCPU_REGS_RBX = 3,
 104         VCPU_REGS_RSP = 4,
 105         VCPU_REGS_RBP = 5,
 106         VCPU_REGS_RSI = 6,
 107         VCPU_REGS_RDI = 7,
 108 #ifdef CONFIG_X86_64
 109         VCPU_REGS_R8 = 8,
 110         VCPU_REGS_R9 = 9,
 111         VCPU_REGS_R10 = 10,
 112         VCPU_REGS_R11 = 11,
 113         VCPU_REGS_R12 = 12,
 114         VCPU_REGS_R13 = 13,
 115         VCPU_REGS_R14 = 14,
 116         VCPU_REGS_R15 = 15,
 117 #endif
 118         VCPU_REGS_RIP,
 119         NR_VCPU_REGS
 120 };
 121
 122 enum {
 123         VCPU_SREG_ES,
 124         VCPU_SREG_CS,
 125         VCPU_SREG_SS,
 126         VCPU_SREG_DS,
 127         VCPU_SREG_FS,
 128         VCPU_SREG_GS,
 129         VCPU_SREG_TR,
 130         VCPU_SREG_LDTR,
 131 };
 132
 133 #include <asm/kvm_x86_emulate.h>
 134
 135 #define KVM_NR_MEM_OBJS 40
 136
 137 struct kvm_guest_debug {
 138         int enabled;
 139         unsigned long bp[4];
 140         int singlestep;
 141 };
 142
 143 /*
 144  * We don't want allocation failures within the mmu code, so we preallocate
 145  * enough memory for a single page fault in a cache.
 146  */
 147 struct kvm_mmu_memory_cache {
 148         int nobjs;
 149         void *objects[KVM_NR_MEM_OBJS];
 150 };
 151
 152 #define NR_PTE_CHAIN_ENTRIES 5
 153
 154 struct kvm_pte_chain {
 155         u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
 156         struct hlist_node link;
 157 };
 158
 159 /*
 160  * kvm_mmu_page_role, below, is defined as:
 161  *
 162  *   bits 0:3 - total guest paging levels (2-4, or zero for real mode)
 163  *   bits 4:7 - page table level for this shadow (1-4)
 164  *   bits 8:9 - page table quadrant for 2-level guests
 165  *   bit   16 - "metaphysical" - gfn is not a real page (huge page/real mode)
 166  *   bits 17:19 - common access permissions for all ptes in this shadow page
 167  */
 168 union kvm_mmu_page_role {
 169         unsigned word;
 170         struct {
 171                 unsigned glevels:4;
 172                 unsigned level:4;
 173                 unsigned quadrant:2;
 174                 unsigned pad_for_nice_hex_output:6;
 175                 unsigned metaphysical:1;
 176                 unsigned access:3;
 177                 unsigned invalid:1;
 178         };
 179 };
 180
 181 struct kvm_mmu_page {
 182         struct list_head link;
 183         struct hlist_node hash_link;
 184
 185         struct list_head oos_link;
 186
 187         /*
 188          * The following two entries are used to key the shadow page in the
 189          * hash table.
 190          */
 191         gfn_t gfn;
 192         union kvm_mmu_page_role role;
 193
 194         u64 *spt;
 195         /* hold the gfn of each spte inside spt */
 196         gfn_t *gfns;
 197         /*
 198          * One bit set per slot which has memory
 199          * in this shadow page.
 200          */
 201         DECLARE_BITMAP(slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS);
 202         int multimapped;         /* More than one parent_pte? */
 203         int root_count;          /* Currently serving as active root */
 204         bool unsync;
 205         bool global;
 206         unsigned int unsync_children;
 207         union {
 208                 u64 *parent_pte;               /* !multimapped */
 209                 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
 210         };
 211         DECLARE_BITMAP(unsync_child_bitmap, 512);
 212 };
 213
 214 struct kvm_pv_mmu_op_buffer {
 215         void *ptr;
 216         unsigned len;
 217         unsigned processed;
 218         char buf[512] __aligned(sizeof(long));
 219 };
 220
 221 /*
 222  * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 223  * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 224  * mode.
 225  */
 226 struct kvm_mmu {
 227         void (*new_cr3)(struct kvm_vcpu *vcpu);
 228         int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
 229         void (*free)(struct kvm_vcpu *vcpu);
 230         gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
 231         void (*prefetch_page)(struct kvm_vcpu *vcpu,
 232                               struct kvm_mmu_page *page);
 233         int (*sync_page)(struct kvm_vcpu *vcpu,
 234                          struct kvm_mmu_page *sp);
 235         void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
 236         hpa_t root_hpa;
 237         int root_level;
 238         int shadow_root_level;
 239
 240         u64 *pae_root;
 241 };
 242
 243 struct kvm_vcpu_arch {
 244         u64 host_tsc;
 245         int interrupt_window_open;
 246         unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
 247         DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
 248         /*
 249          * rip and regs accesses must go through
 250          * kvm_{register,rip}_{read,write} functions.
 251          */
 252         unsigned long regs[NR_VCPU_REGS];
 253         u32 regs_avail;
 254         u32 regs_dirty;
 255
 256         unsigned long cr0;
 257         unsigned long cr2;
 258         unsigned long cr3;
 259         unsigned long cr4;
 260         unsigned long cr8;
 261         u64 pdptrs[4]; /* pae */
 262         u64 shadow_efer;
 263         u64 apic_base;
 264         struct kvm_lapic *apic;    /* kernel irqchip context */
 265         int mp_state;
 266         int sipi_vector;
 267         u64 ia32_misc_enable_msr;
 268         bool tpr_access_reporting;
 269
 270         struct kvm_mmu mmu;
 271         /* only needed in kvm_pv_mmu_op() path, but it's hot so
 272          * put it here to avoid allocation */
 273         struct kvm_pv_mmu_op_buffer mmu_op_buffer;
 274
 275         struct kvm_mmu_memory_cache mmu_pte_chain_cache;
 276         struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
 277         struct kvm_mmu_memory_cache mmu_page_cache;
 278         struct kvm_mmu_memory_cache mmu_page_header_cache;
 279
 280         gfn_t last_pt_write_gfn;
 281         int   last_pt_write_count;
 282         u64  *last_pte_updated;
 283         gfn_t last_pte_gfn;
 284
 285         struct {
 286                 gfn_t gfn;      /* presumed gfn during guest pte update */
 287                 pfn_t pfn;      /* pfn corresponding to that gfn */
 288                 int largepage;
 289                 unsigned long mmu_seq;
 290         } update_pte;
 291
 292         struct i387_fxsave_struct host_fx_image;
 293         struct i387_fxsave_struct guest_fx_image;
 294
 295         gva_t mmio_fault_cr2;
 296         struct kvm_pio_request pio;
 297         void *pio_data;
 298
 299         struct kvm_queued_exception {
 300                 bool pending;
 301                 bool has_error_code;
 302                 u8 nr;
 303                 u32 error_code;
 304         } exception;
 305
 306         struct kvm_queued_interrupt {
 307                 bool pending;
 308                 u8 nr;
 309         } interrupt;
 310
 311         struct {
 312                 int active;
 313                 u8 save_iopl;
 314                 struct kvm_save_segment {
 315                         u16 selector;
 316                         unsigned long base;
 317                         u32 limit;
 318                         u32 ar;
 319                 } tr, es, ds, fs, gs;
 320         } rmode;
 321         int halt_request; /* real mode on Intel only */
 322
 323         int cpuid_nent;
 324         struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
 325         /* emulate context */
 326
 327         struct x86_emulate_ctxt emulate_ctxt;
 328
 329         gpa_t time;
 330         struct pvclock_vcpu_time_info hv_clock;
 331         unsigned int hv_clock_tsc_khz;
 332         unsigned int time_offset;
 333         struct page *time_page;
 334
 335         bool nmi_pending;
 336         bool nmi_injected;
 337         bool nmi_window_open;
 338
 339         struct mtrr_state_type mtrr_state;
 340         u32 pat;
 341 };
 342
 343 struct kvm_mem_alias {
 344         gfn_t base_gfn;
 345         unsigned long npages;
 346         gfn_t target_gfn;
 347 };
 348
 349 struct kvm_arch{
 350         int naliases;
 351         struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
 352
 353         unsigned int n_free_mmu_pages;
 354         unsigned int n_requested_mmu_pages;
 355         unsigned int n_alloc_mmu_pages;
 356         struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 357         /*
 358          * Hash table of struct kvm_mmu_page.
 359          */
 360         struct list_head active_mmu_pages;
 361         struct list_head assigned_dev_head;
 362         struct list_head oos_global_pages;
 363         struct iommu_domain *iommu_domain;
 364         struct kvm_pic *vpic;
 365         struct kvm_ioapic *vioapic;
 366         struct kvm_pit *vpit;
 367         struct hlist_head irq_ack_notifier_list;
 368         int vapics_in_nmi_mode;
 369
 370         int round_robin_prev_vcpu;
 371         unsigned int tss_addr;
 372         struct page *apic_access_page;
 373
 374         gpa_t wall_clock;
 375
 376         struct page *ept_identity_pagetable;
 377         bool ept_identity_pagetable_done;
 378
 379         unsigned long irq_sources_bitmap;
 380         unsigned long irq_states[KVM_IOAPIC_NUM_PINS];
 381 };
 382
 383 struct kvm_vm_stat {
 384         u32 mmu_shadow_zapped;
 385         u32 mmu_pte_write;
 386         u32 mmu_pte_updated;
 387         u32 mmu_pde_zapped;
 388         u32 mmu_flooded;
 389         u32 mmu_recycled;
 390         u32 mmu_cache_miss;
 391         u32 mmu_unsync;
 392         u32 mmu_unsync_global;
 393         u32 remote_tlb_flush;
 394         u32 lpages;
 395 };
 396
 397 struct kvm_vcpu_stat {
 398         u32 pf_fixed;
 399         u32 pf_guest;
 400         u32 tlb_flush;
 401         u32 invlpg;
 402
 403         u32 exits;
 404         u32 io_exits;
 405         u32 mmio_exits;
 406         u32 signal_exits;
 407         u32 irq_window_exits;
 408         u32 nmi_window_exits;
 409         u32 halt_exits;
 410         u32 halt_wakeup;
 411         u32 request_irq_exits;
 412         u32 request_nmi_exits;
 413         u32 irq_exits;
 414         u32 host_state_reload;
 415         u32 efer_reload;
 416         u32 fpu_reload;
 417         u32 insn_emulation;
 418         u32 insn_emulation_fail;
 419         u32 hypercalls;
 420         u32 irq_injections;
 421         u32 nmi_injections;
 422 };
 423
 424 struct descriptor_table {
 425         u16 limit;
 426         unsigned long base;
 427 } __attribute__((packed));
 428
 429 struct kvm_x86_ops {
 430         int (*cpu_has_kvm_support)(void);          /* __init */
 431         int (*disabled_by_bios)(void);             /* __init */
 432         void (*hardware_enable)(void *dummy);      /* __init */
 433         void (*hardware_disable)(void *dummy);
 434         void (*check_processor_compatibility)(void *rtn);
 435         int (*hardware_setup)(void);               /* __init */
 436         void (*hardware_unsetup)(void);            /* __exit */
 437         bool (*cpu_has_accelerated_tpr)(void);
 438
 439         /* Create, but do not attach this VCPU */
 440         struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
 441         void (*vcpu_free)(struct kvm_vcpu *vcpu);
 442         int (*vcpu_reset)(struct kvm_vcpu *vcpu);
 443
 444         void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
 445         void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
 446         void (*vcpu_put)(struct kvm_vcpu *vcpu);
 447
 448         int (*set_guest_debug)(struct kvm_vcpu *vcpu,
 449                                struct kvm_debug_guest *dbg);
 450         void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
 451         int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
 452         int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 453         u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
 454         void (*get_segment)(struct kvm_vcpu *vcpu,
 455                             struct kvm_segment *var, int seg);
 456         int (*get_cpl)(struct kvm_vcpu *vcpu);
 457         void (*set_segment)(struct kvm_vcpu *vcpu,
 458                             struct kvm_segment *var, int seg);
 459         void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
 460         void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
 461         void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
 462         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 463         void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
 464         void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
 465         void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 466         void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 467         void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 468         void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 469         unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
 470         void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
 471                        int *exception);
 472         void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
 473         unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
 474         void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
 475
 476         void (*tlb_flush)(struct kvm_vcpu *vcpu);
 477
 478         void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
 479         int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
 480         void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
 481         void (*patch_hypercall)(struct kvm_vcpu *vcpu,
 482                                 unsigned char *hypercall_addr);
 483         int (*get_irq)(struct kvm_vcpu *vcpu);
 484         void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
 485         void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
 486                                 bool has_error_code, u32 error_code);
 487         bool (*exception_injected)(struct kvm_vcpu *vcpu);
 488         void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
 489         void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
 490                                        struct kvm_run *run);
 491
 492         int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
 493         int (*get_tdp_level)(void);
 494         int (*get_mt_mask_shift)(void);
 495 };
 496
 497 extern struct kvm_x86_ops *kvm_x86_ops;
 498
 499 int kvm_mmu_module_init(void);
 500 void kvm_mmu_module_exit(void);
 501
 502 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 503 int kvm_mmu_create(struct kvm_vcpu *vcpu);
 504 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 505 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
 506 void kvm_mmu_set_base_ptes(u64 base_pte);
 507 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
 508                 u64 dirty_mask, u64 nx_mask, u64 x_mask, u64 mt_mask);
 509
 510 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 511 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
 512 void kvm_mmu_zap_all(struct kvm *kvm);
 513 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
 514 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
 515
 516 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 517
 518 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
 519                           const void *val, int bytes);
 520 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
 521                   gpa_t addr, unsigned long *ret);
 522
 523 extern bool tdp_enabled;
 524
 525 enum emulation_result {
 526         EMULATE_DONE,       /* no further processing */
 527         EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
 528         EMULATE_FAIL,         /* can't emulate this instruction */
 529 };
 530
 531 #define EMULTYPE_NO_DECODE          (1 << 0)
 532 #define EMULTYPE_TRAP_UD            (1 << 1)
 533 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
 534                         unsigned long cr2, u16 error_code, int emulation_type);
 535 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
 536 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 537 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 538 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
 539                    unsigned long *rflags);
 540
 541 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
 542 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
 543                      unsigned long *rflags);
 544 void kvm_enable_efer_bits(u64);
 545 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
 546 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 547
 548 struct x86_emulate_ctxt;
 549
 550 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 551                      int size, unsigned port);
 552 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 553                            int size, unsigned long count, int down,
 554                             gva_t address, int rep, unsigned port);
 555 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
 556 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
 557 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
 558 int emulate_clts(struct kvm_vcpu *vcpu);
 559 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
 560                     unsigned long *dest);
 561 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
 562                     unsigned long value);
 563
 564 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
 565 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
 566                                 int type_bits, int seg);
 567
 568 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason);
 569
 570 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 571 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
 572 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
 573 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
 574 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
 575 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 576 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
 577
 578 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 579 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 580
 581 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 582 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 583 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
 584                            u32 error_code);
 585
 586 void kvm_pic_set_irq(void *opaque, int irq, int level);
 587
 588 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
 589
 590 void fx_init(struct kvm_vcpu *vcpu);
 591
 592 int emulator_read_std(unsigned long addr,
 593                       void *val,
 594                       unsigned int bytes,
 595                       struct kvm_vcpu *vcpu);
 596 int emulator_write_emulated(unsigned long addr,
 597                             const void *val,
 598                             unsigned int bytes,
 599                             struct kvm_vcpu *vcpu);
 600
 601 unsigned long segment_base(u16 selector);
 602
 603 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
 604 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 605                        const u8 *new, int bytes,
 606                        bool guest_initiated);
 607 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 608 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 609 int kvm_mmu_load(struct kvm_vcpu *vcpu);
 610 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
 611 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
 612 void kvm_mmu_sync_global(struct kvm_vcpu *vcpu);
 613
 614 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
 615
 616 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
 617
 618 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
 619 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
 620
 621 void kvm_enable_tdp(void);
 622 void kvm_disable_tdp(void);
 623
 624 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 625 int complete_pio(struct kvm_vcpu *vcpu);
 626
 627 struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn);
 628
 629 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
 630 {
 631         struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
 632
 633         return (struct kvm_mmu_page *)page_private(page);
 634 }
 635
 636 static inline u16 kvm_read_fs(void)
 637 {
 638         u16 seg;
 639         asm("mov %%fs, %0" : "=g"(seg));
 640         return seg;
 641 }
 642
 643 static inline u16 kvm_read_gs(void)
 644 {
 645         u16 seg;
 646         asm("mov %%gs, %0" : "=g"(seg));
 647         return seg;
 648 }
 649
 650 static inline u16 kvm_read_ldt(void)
 651 {
 652         u16 ldt;
 653         asm("sldt %0" : "=g"(ldt));
 654         return ldt;
 655 }
 656
 657 static inline void kvm_load_fs(u16 sel)
 658 {
 659         asm("mov %0, %%fs" : : "rm"(sel));
 660 }
 661
 662 static inline void kvm_load_gs(u16 sel)
 663 {
 664         asm("mov %0, %%gs" : : "rm"(sel));
 665 }
 666
 667 static inline void kvm_load_ldt(u16 sel)
 668 {
 669         asm("lldt %0" : : "rm"(sel));
 670 }
 671
 672 static inline void kvm_get_idt(struct descriptor_table *table)
 673 {
 674         asm("sidt %0" : "=m"(*table));
 675 }
 676
 677 static inline void kvm_get_gdt(struct descriptor_table *table)
 678 {
 679         asm("sgdt %0" : "=m"(*table));
 680 }
 681
 682 static inline unsigned long kvm_read_tr_base(void)
 683 {
 684         u16 tr;
 685         asm("str %0" : "=g"(tr));
 686         return segment_base(tr);
 687 }
 688
 689 #ifdef CONFIG_X86_64
 690 static inline unsigned long read_msr(unsigned long msr)
 691 {
 692         u64 value;
 693
 694         rdmsrl(msr, value);
 695         return value;
 696 }
 697 #endif
 698
 699 static inline void kvm_fx_save(struct i387_fxsave_struct *image)
 700 {
 701         asm("fxsave (%0)":: "r" (image));
 702 }
 703
 704 static inline void kvm_fx_restore(struct i387_fxsave_struct *image)
 705 {
 706         asm("fxrstor (%0)":: "r" (image));
 707 }
 708
 709 static inline void kvm_fx_finit(void)
 710 {
 711         asm("finit");
 712 }
 713
 714 static inline u32 get_rdx_init_val(void)
 715 {
 716         return 0x600; /* P6 family */
 717 }
 718
 719 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
 720 {
 721         kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
 722 }
 723
 724 #define MSR_IA32_TIME_STAMP_COUNTER             0x010
 725
 726 #define TSS_IOPB_BASE_OFFSET 0x66
 727 #define TSS_BASE_SIZE 0x68
 728 #define TSS_IOPB_SIZE (65536 / 8)
 729 #define TSS_REDIRECTION_SIZE (256 / 8)
 730 #define RMODE_TSS_SIZE                                                  \
 731         (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
 732
 733 enum {
 734         TASK_SWITCH_CALL = 0,
 735         TASK_SWITCH_IRET = 1,
 736         TASK_SWITCH_JMP = 2,
 737         TASK_SWITCH_GATE = 3,
 738 };
 739
 740 /*
 741  * Hardware virtualization extension instructions may fault if a
 742  * reboot turns off virtualization while processes are running.
 743  * Trap the fault and ignore the instruction if that happens.
 744  */
 745 asmlinkage void kvm_handle_fault_on_reboot(void);
 746
 747 #define __kvm_handle_fault_on_reboot(insn) \
 748         "666: " insn "\n\t" \
 749         ".pushsection .fixup, \"ax\" \n" \
 750         "667: \n\t" \
 751         __ASM_SIZE(push) " $666b \n\t"        \
 752         "jmp kvm_handle_fault_on_reboot \n\t" \
 753         ".popsection \n\t" \
 754         ".pushsection __ex_table, \"a\" \n\t" \
 755         _ASM_PTR " 666b, 667b \n\t" \
 756         ".popsection"
 757
 758 #define KVM_ARCH_WANT_MMU_NOTIFIER
 759 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
 760 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
 761
 762 #endif /* _ASM_X86_KVM_HOST_H */