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         /*
 186          * The following two entries are used to key the shadow page in the
 187          * hash table.
 188          */
 189         gfn_t gfn;
 190         union kvm_mmu_page_role role;
 191
 192         u64 *spt;
 193         /* hold the gfn of each spte inside spt */
 194         gfn_t *gfns;
 195         unsigned long slot_bitmap; /* One bit set per slot which has memory
 196                                     * in this shadow page.
 197                                     */
 198         int multimapped;         /* More than one parent_pte? */
 199         int root_count;          /* Currently serving as active root */
 200         bool unsync;
 201         bool unsync_children;
 202         union {
 203                 u64 *parent_pte;               /* !multimapped */
 204                 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
 205         };
 206         DECLARE_BITMAP(unsync_child_bitmap, 512);
 207 };
 208
 209 struct kvm_pv_mmu_op_buffer {
 210         void *ptr;
 211         unsigned len;
 212         unsigned processed;
 213         char buf[512] __aligned(sizeof(long));
 214 };
 215
 216 /*
 217  * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 218  * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 219  * mode.
 220  */
 221 struct kvm_mmu {
 222         void (*new_cr3)(struct kvm_vcpu *vcpu);
 223         int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
 224         void (*free)(struct kvm_vcpu *vcpu);
 225         gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
 226         void (*prefetch_page)(struct kvm_vcpu *vcpu,
 227                               struct kvm_mmu_page *page);
 228         int (*sync_page)(struct kvm_vcpu *vcpu,
 229                          struct kvm_mmu_page *sp);
 230         void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
 231         hpa_t root_hpa;
 232         int root_level;
 233         int shadow_root_level;
 234
 235         u64 *pae_root;
 236 };
 237
 238 struct kvm_vcpu_arch {
 239         u64 host_tsc;
 240         int interrupt_window_open;
 241         unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
 242         DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
 243         /*
 244          * rip and regs accesses must go through
 245          * kvm_{register,rip}_{read,write} functions.
 246          */
 247         unsigned long regs[NR_VCPU_REGS];
 248         u32 regs_avail;
 249         u32 regs_dirty;
 250
 251         unsigned long cr0;
 252         unsigned long cr2;
 253         unsigned long cr3;
 254         unsigned long cr4;
 255         unsigned long cr8;
 256         u64 pdptrs[4]; /* pae */
 257         u64 shadow_efer;
 258         u64 apic_base;
 259         struct kvm_lapic *apic;    /* kernel irqchip context */
 260         int mp_state;
 261         int sipi_vector;
 262         u64 ia32_misc_enable_msr;
 263         bool tpr_access_reporting;
 264
 265         struct kvm_mmu mmu;
 266         /* only needed in kvm_pv_mmu_op() path, but it's hot so
 267          * put it here to avoid allocation */
 268         struct kvm_pv_mmu_op_buffer mmu_op_buffer;
 269
 270         struct kvm_mmu_memory_cache mmu_pte_chain_cache;
 271         struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
 272         struct kvm_mmu_memory_cache mmu_page_cache;
 273         struct kvm_mmu_memory_cache mmu_page_header_cache;
 274
 275         gfn_t last_pt_write_gfn;
 276         int   last_pt_write_count;
 277         u64  *last_pte_updated;
 278         gfn_t last_pte_gfn;
 279
 280         struct {
 281                 gfn_t gfn;      /* presumed gfn during guest pte update */
 282                 pfn_t pfn;      /* pfn corresponding to that gfn */
 283                 int largepage;
 284                 unsigned long mmu_seq;
 285         } update_pte;
 286
 287         struct i387_fxsave_struct host_fx_image;
 288         struct i387_fxsave_struct guest_fx_image;
 289
 290         gva_t mmio_fault_cr2;
 291         struct kvm_pio_request pio;
 292         void *pio_data;
 293
 294         struct kvm_queued_exception {
 295                 bool pending;
 296                 bool has_error_code;
 297                 u8 nr;
 298                 u32 error_code;
 299         } exception;
 300
 301         struct kvm_queued_interrupt {
 302                 bool pending;
 303                 u8 nr;
 304         } interrupt;
 305
 306         struct {
 307                 int active;
 308                 u8 save_iopl;
 309                 struct kvm_save_segment {
 310                         u16 selector;
 311                         unsigned long base;
 312                         u32 limit;
 313                         u32 ar;
 314                 } tr, es, ds, fs, gs;
 315         } rmode;
 316         int halt_request; /* real mode on Intel only */
 317
 318         int cpuid_nent;
 319         struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
 320         /* emulate context */
 321
 322         struct x86_emulate_ctxt emulate_ctxt;
 323
 324         gpa_t time;
 325         struct pvclock_vcpu_time_info hv_clock;
 326         unsigned int hv_clock_tsc_khz;
 327         unsigned int time_offset;
 328         struct page *time_page;
 329
 330         bool nmi_pending;
 331         bool nmi_injected;
 332         bool nmi_window_open;
 333
 334         struct mtrr_state_type mtrr_state;
 335         u32 pat;
 336 };
 337
 338 struct kvm_mem_alias {
 339         gfn_t base_gfn;
 340         unsigned long npages;
 341         gfn_t target_gfn;
 342 };
 343
 344 struct kvm_arch{
 345         int naliases;
 346         struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
 347
 348         unsigned int n_free_mmu_pages;
 349         unsigned int n_requested_mmu_pages;
 350         unsigned int n_alloc_mmu_pages;
 351         struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 352         /*
 353          * Hash table of struct kvm_mmu_page.
 354          */
 355         struct list_head active_mmu_pages;
 356         struct list_head assigned_dev_head;
 357         struct dmar_domain *intel_iommu_domain;
 358         struct kvm_pic *vpic;
 359         struct kvm_ioapic *vioapic;
 360         struct kvm_pit *vpit;
 361         struct hlist_head irq_ack_notifier_list;
 362
 363         int round_robin_prev_vcpu;
 364         unsigned int tss_addr;
 365         struct page *apic_access_page;
 366
 367         gpa_t wall_clock;
 368
 369         struct page *ept_identity_pagetable;
 370         bool ept_identity_pagetable_done;
 371
 372         unsigned long irq_sources_bitmap;
 373         unsigned long irq_states[KVM_IOAPIC_NUM_PINS];
 374 };
 375
 376 struct kvm_vm_stat {
 377         u32 mmu_shadow_zapped;
 378         u32 mmu_pte_write;
 379         u32 mmu_pte_updated;
 380         u32 mmu_pde_zapped;
 381         u32 mmu_flooded;
 382         u32 mmu_recycled;
 383         u32 mmu_cache_miss;
 384         u32 mmu_unsync;
 385         u32 remote_tlb_flush;
 386         u32 lpages;
 387 };
 388
 389 struct kvm_vcpu_stat {
 390         u32 pf_fixed;
 391         u32 pf_guest;
 392         u32 tlb_flush;
 393         u32 invlpg;
 394
 395         u32 exits;
 396         u32 io_exits;
 397         u32 mmio_exits;
 398         u32 signal_exits;
 399         u32 irq_window_exits;
 400         u32 nmi_window_exits;
 401         u32 halt_exits;
 402         u32 halt_wakeup;
 403         u32 request_irq_exits;
 404         u32 request_nmi_exits;
 405         u32 irq_exits;
 406         u32 host_state_reload;
 407         u32 efer_reload;
 408         u32 fpu_reload;
 409         u32 insn_emulation;
 410         u32 insn_emulation_fail;
 411         u32 hypercalls;
 412         u32 irq_injections;
 413         u32 nmi_injections;
 414 };
 415
 416 struct descriptor_table {
 417         u16 limit;
 418         unsigned long base;
 419 } __attribute__((packed));
 420
 421 struct kvm_x86_ops {
 422         int (*cpu_has_kvm_support)(void);          /* __init */
 423         int (*disabled_by_bios)(void);             /* __init */
 424         void (*hardware_enable)(void *dummy);      /* __init */
 425         void (*hardware_disable)(void *dummy);
 426         void (*check_processor_compatibility)(void *rtn);
 427         int (*hardware_setup)(void);               /* __init */
 428         void (*hardware_unsetup)(void);            /* __exit */
 429         bool (*cpu_has_accelerated_tpr)(void);
 430
 431         /* Create, but do not attach this VCPU */
 432         struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
 433         void (*vcpu_free)(struct kvm_vcpu *vcpu);
 434         int (*vcpu_reset)(struct kvm_vcpu *vcpu);
 435
 436         void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
 437         void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
 438         void (*vcpu_put)(struct kvm_vcpu *vcpu);
 439
 440         int (*set_guest_debug)(struct kvm_vcpu *vcpu,
 441                                struct kvm_debug_guest *dbg);
 442         void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
 443         int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
 444         int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 445         u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
 446         void (*get_segment)(struct kvm_vcpu *vcpu,
 447                             struct kvm_segment *var, int seg);
 448         int (*get_cpl)(struct kvm_vcpu *vcpu);
 449         void (*set_segment)(struct kvm_vcpu *vcpu,
 450                             struct kvm_segment *var, int seg);
 451         void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
 452         void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
 453         void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
 454         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 455         void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
 456         void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
 457         void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 458         void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 459         void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 460         void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 461         unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
 462         void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
 463                        int *exception);
 464         void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
 465         unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
 466         void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
 467
 468         void (*tlb_flush)(struct kvm_vcpu *vcpu);
 469
 470         void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
 471         int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
 472         void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
 473         void (*patch_hypercall)(struct kvm_vcpu *vcpu,
 474                                 unsigned char *hypercall_addr);
 475         int (*get_irq)(struct kvm_vcpu *vcpu);
 476         void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
 477         void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
 478                                 bool has_error_code, u32 error_code);
 479         bool (*exception_injected)(struct kvm_vcpu *vcpu);
 480         void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
 481         void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
 482                                        struct kvm_run *run);
 483
 484         int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
 485         int (*get_tdp_level)(void);
 486 };
 487
 488 extern struct kvm_x86_ops *kvm_x86_ops;
 489
 490 int kvm_mmu_module_init(void);
 491 void kvm_mmu_module_exit(void);
 492
 493 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 494 int kvm_mmu_create(struct kvm_vcpu *vcpu);
 495 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 496 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
 497 void kvm_mmu_set_base_ptes(u64 base_pte);
 498 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
 499                 u64 dirty_mask, u64 nx_mask, u64 x_mask);
 500
 501 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 502 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
 503 void kvm_mmu_zap_all(struct kvm *kvm);
 504 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
 505 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
 506
 507 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 508
 509 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
 510                           const void *val, int bytes);
 511 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
 512                   gpa_t addr, unsigned long *ret);
 513
 514 extern bool tdp_enabled;
 515
 516 enum emulation_result {
 517         EMULATE_DONE,       /* no further processing */
 518         EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
 519         EMULATE_FAIL,         /* can't emulate this instruction */
 520 };
 521
 522 #define EMULTYPE_NO_DECODE          (1 << 0)
 523 #define EMULTYPE_TRAP_UD            (1 << 1)
 524 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
 525                         unsigned long cr2, u16 error_code, int emulation_type);
 526 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
 527 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 528 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 529 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
 530                    unsigned long *rflags);
 531
 532 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
 533 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
 534                      unsigned long *rflags);
 535 void kvm_enable_efer_bits(u64);
 536 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
 537 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 538
 539 struct x86_emulate_ctxt;
 540
 541 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 542                      int size, unsigned port);
 543 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 544                            int size, unsigned long count, int down,
 545                             gva_t address, int rep, unsigned port);
 546 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
 547 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
 548 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
 549 int emulate_clts(struct kvm_vcpu *vcpu);
 550 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
 551                     unsigned long *dest);
 552 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
 553                     unsigned long value);
 554
 555 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
 556 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
 557                                 int type_bits, int seg);
 558
 559 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason);
 560
 561 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 562 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
 563 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
 564 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
 565 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
 566 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 567 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
 568
 569 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 570 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 571
 572 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 573 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 574 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
 575                            u32 error_code);
 576
 577 void kvm_pic_set_irq(void *opaque, int irq, int level);
 578
 579 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
 580
 581 void fx_init(struct kvm_vcpu *vcpu);
 582
 583 int emulator_read_std(unsigned long addr,
 584                       void *val,
 585                       unsigned int bytes,
 586                       struct kvm_vcpu *vcpu);
 587 int emulator_write_emulated(unsigned long addr,
 588                             const void *val,
 589                             unsigned int bytes,
 590                             struct kvm_vcpu *vcpu);
 591
 592 unsigned long segment_base(u16 selector);
 593
 594 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
 595 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 596                        const u8 *new, int bytes);
 597 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 598 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 599 int kvm_mmu_load(struct kvm_vcpu *vcpu);
 600 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
 601 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
 602
 603 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
 604
 605 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
 606
 607 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
 608 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
 609
 610 void kvm_enable_tdp(void);
 611 void kvm_disable_tdp(void);
 612
 613 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 614 int complete_pio(struct kvm_vcpu *vcpu);
 615
 616 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
 617 {
 618         struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
 619
 620         return (struct kvm_mmu_page *)page_private(page);
 621 }
 622
 623 static inline u16 kvm_read_fs(void)
 624 {
 625         u16 seg;
 626         asm("mov %%fs, %0" : "=g"(seg));
 627         return seg;
 628 }
 629
 630 static inline u16 kvm_read_gs(void)
 631 {
 632         u16 seg;
 633         asm("mov %%gs, %0" : "=g"(seg));
 634         return seg;
 635 }
 636
 637 static inline u16 kvm_read_ldt(void)
 638 {
 639         u16 ldt;
 640         asm("sldt %0" : "=g"(ldt));
 641         return ldt;
 642 }
 643
 644 static inline void kvm_load_fs(u16 sel)
 645 {
 646         asm("mov %0, %%fs" : : "rm"(sel));
 647 }
 648
 649 static inline void kvm_load_gs(u16 sel)
 650 {
 651         asm("mov %0, %%gs" : : "rm"(sel));
 652 }
 653
 654 static inline void kvm_load_ldt(u16 sel)
 655 {
 656         asm("lldt %0" : : "rm"(sel));
 657 }
 658
 659 static inline void kvm_get_idt(struct descriptor_table *table)
 660 {
 661         asm("sidt %0" : "=m"(*table));
 662 }
 663
 664 static inline void kvm_get_gdt(struct descriptor_table *table)
 665 {
 666         asm("sgdt %0" : "=m"(*table));
 667 }
 668
 669 static inline unsigned long kvm_read_tr_base(void)
 670 {
 671         u16 tr;
 672         asm("str %0" : "=g"(tr));
 673         return segment_base(tr);
 674 }
 675
 676 #ifdef CONFIG_X86_64
 677 static inline unsigned long read_msr(unsigned long msr)
 678 {
 679         u64 value;
 680
 681         rdmsrl(msr, value);
 682         return value;
 683 }
 684 #endif
 685
 686 static inline void kvm_fx_save(struct i387_fxsave_struct *image)
 687 {
 688         asm("fxsave (%0)":: "r" (image));
 689 }
 690
 691 static inline void kvm_fx_restore(struct i387_fxsave_struct *image)
 692 {
 693         asm("fxrstor (%0)":: "r" (image));
 694 }
 695
 696 static inline void kvm_fx_finit(void)
 697 {
 698         asm("finit");
 699 }
 700
 701 static inline u32 get_rdx_init_val(void)
 702 {
 703         return 0x600; /* P6 family */
 704 }
 705
 706 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
 707 {
 708         kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
 709 }
 710
 711 #define ASM_VMX_VMCLEAR_RAX       ".byte 0x66, 0x0f, 0xc7, 0x30"
 712 #define ASM_VMX_VMLAUNCH          ".byte 0x0f, 0x01, 0xc2"
 713 #define ASM_VMX_VMRESUME          ".byte 0x0f, 0x01, 0xc3"
 714 #define ASM_VMX_VMPTRLD_RAX       ".byte 0x0f, 0xc7, 0x30"
 715 #define ASM_VMX_VMREAD_RDX_RAX    ".byte 0x0f, 0x78, 0xd0"
 716 #define ASM_VMX_VMWRITE_RAX_RDX   ".byte 0x0f, 0x79, 0xd0"
 717 #define ASM_VMX_VMWRITE_RSP_RDX   ".byte 0x0f, 0x79, 0xd4"
 718 #define ASM_VMX_VMXOFF            ".byte 0x0f, 0x01, 0xc4"
 719 #define ASM_VMX_VMXON_RAX         ".byte 0xf3, 0x0f, 0xc7, 0x30"
 720 #define ASM_VMX_INVEPT            ".byte 0x66, 0x0f, 0x38, 0x80, 0x08"
 721 #define ASM_VMX_INVVPID           ".byte 0x66, 0x0f, 0x38, 0x81, 0x08"
 722
 723 #define MSR_IA32_TIME_STAMP_COUNTER             0x010
 724
 725 #define TSS_IOPB_BASE_OFFSET 0x66
 726 #define TSS_BASE_SIZE 0x68
 727 #define TSS_IOPB_SIZE (65536 / 8)
 728 #define TSS_REDIRECTION_SIZE (256 / 8)
 729 #define RMODE_TSS_SIZE                                                  \
 730         (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
 731
 732 enum {
 733         TASK_SWITCH_CALL = 0,
 734         TASK_SWITCH_IRET = 1,
 735         TASK_SWITCH_JMP = 2,
 736         TASK_SWITCH_GATE = 3,
 737 };
 738
 739 /*
 740  * Hardware virtualization extension instructions may fault if a
 741  * reboot turns off virtualization while processes are running.
 742  * Trap the fault and ignore the instruction if that happens.
 743  */
 744 asmlinkage void kvm_handle_fault_on_reboot(void);
 745
 746 #define __kvm_handle_fault_on_reboot(insn) \
 747         "666: " insn "\n\t" \
 748         ".pushsection .fixup, \"ax\" \n" \
 749         "667: \n\t" \
 750         __ASM_SIZE(push) " $666b \n\t"        \
 751         "jmp kvm_handle_fault_on_reboot \n\t" \
 752         ".popsection \n\t" \
 753         ".pushsection __ex_table, \"a\" \n\t" \
 754         _ASM_PTR " 666b, 667b \n\t" \
 755         ".popsection"
 756
 757 #define KVM_ARCH_WANT_MMU_NOTIFIER
 758 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
 759 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
 760
 761 #endif /* _ASM_X86_KVM_HOST_H */