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 #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
  25 #define KVM_MAX_VCPUS 16
  26 #define KVM_MEMORY_SLOTS 32
  27 /* memory slots that does not exposed to userspace */
  28 #define KVM_PRIVATE_MEM_SLOTS 4
  29
  30 #define KVM_PIO_PAGE_OFFSET 1
  31 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2
  32
  33 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
  34 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
  35 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS |    \
  36                                   0xFFFFFF0000000000ULL)
  37
  38 #define KVM_GUEST_CR0_MASK                                 \
  39         (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
  40          | X86_CR0_NW | X86_CR0_CD)
  41 #define KVM_VM_CR0_ALWAYS_ON                                            \
  42         (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
  43          | X86_CR0_MP)
  44 #define KVM_GUEST_CR4_MASK                                              \
  45         (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
  46 #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
  47 #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
  48
  49 #define INVALID_PAGE (~(hpa_t)0)
  50 #define UNMAPPED_GVA (~(gpa_t)0)
  51
  52 /* shadow tables are PAE even on non-PAE hosts */
  53 #define KVM_HPAGE_SHIFT 21
  54 #define KVM_HPAGE_SIZE (1UL << KVM_HPAGE_SHIFT)
  55 #define KVM_HPAGE_MASK (~(KVM_HPAGE_SIZE - 1))
  56
  57 #define KVM_PAGES_PER_HPAGE (KVM_HPAGE_SIZE / PAGE_SIZE)
  58
  59 #define DE_VECTOR 0
  60 #define UD_VECTOR 6
  61 #define NM_VECTOR 7
  62 #define DF_VECTOR 8
  63 #define TS_VECTOR 10
  64 #define NP_VECTOR 11
  65 #define SS_VECTOR 12
  66 #define GP_VECTOR 13
  67 #define PF_VECTOR 14
  68 #define MC_VECTOR 18
  69
  70 #define SELECTOR_TI_MASK (1 << 2)
  71 #define SELECTOR_RPL_MASK 0x03
  72
  73 #define IOPL_SHIFT 12
  74
  75 #define KVM_ALIAS_SLOTS 4
  76
  77 #define KVM_PERMILLE_MMU_PAGES 20
  78 #define KVM_MIN_ALLOC_MMU_PAGES 64
  79 #define KVM_MMU_HASH_SHIFT 10
  80 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
  81 #define KVM_MIN_FREE_MMU_PAGES 5
  82 #define KVM_REFILL_PAGES 25
  83 #define KVM_MAX_CPUID_ENTRIES 40
  84 #define KVM_NR_VAR_MTRR 8
  85
  86 extern spinlock_t kvm_lock;
  87 extern struct list_head vm_list;
  88
  89 struct kvm_vcpu;
  90 struct kvm;
  91
  92 enum {
  93         VCPU_REGS_RAX = 0,
  94         VCPU_REGS_RCX = 1,
  95         VCPU_REGS_RDX = 2,
  96         VCPU_REGS_RBX = 3,
  97         VCPU_REGS_RSP = 4,
  98         VCPU_REGS_RBP = 5,
  99         VCPU_REGS_RSI = 6,
 100         VCPU_REGS_RDI = 7,
 101 #ifdef CONFIG_X86_64
 102         VCPU_REGS_R8 = 8,
 103         VCPU_REGS_R9 = 9,
 104         VCPU_REGS_R10 = 10,
 105         VCPU_REGS_R11 = 11,
 106         VCPU_REGS_R12 = 12,
 107         VCPU_REGS_R13 = 13,
 108         VCPU_REGS_R14 = 14,
 109         VCPU_REGS_R15 = 15,
 110 #endif
 111         NR_VCPU_REGS
 112 };
 113
 114 enum {
 115         VCPU_SREG_ES,
 116         VCPU_SREG_CS,
 117         VCPU_SREG_SS,
 118         VCPU_SREG_DS,
 119         VCPU_SREG_FS,
 120         VCPU_SREG_GS,
 121         VCPU_SREG_TR,
 122         VCPU_SREG_LDTR,
 123 };
 124
 125 #include <asm/kvm_x86_emulate.h>
 126
 127 #define KVM_NR_MEM_OBJS 40
 128
 129 struct kvm_guest_debug {
 130         int enabled;
 131         unsigned long bp[4];
 132         int singlestep;
 133 };
 134
 135 /*
 136  * We don't want allocation failures within the mmu code, so we preallocate
 137  * enough memory for a single page fault in a cache.
 138  */
 139 struct kvm_mmu_memory_cache {
 140         int nobjs;
 141         void *objects[KVM_NR_MEM_OBJS];
 142 };
 143
 144 #define NR_PTE_CHAIN_ENTRIES 5
 145
 146 struct kvm_pte_chain {
 147         u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
 148         struct hlist_node link;
 149 };
 150
 151 /*
 152  * kvm_mmu_page_role, below, is defined as:
 153  *
 154  *   bits 0:3 - total guest paging levels (2-4, or zero for real mode)
 155  *   bits 4:7 - page table level for this shadow (1-4)
 156  *   bits 8:9 - page table quadrant for 2-level guests
 157  *   bit   16 - "metaphysical" - gfn is not a real page (huge page/real mode)
 158  *   bits 17:19 - common access permissions for all ptes in this shadow page
 159  */
 160 union kvm_mmu_page_role {
 161         unsigned word;
 162         struct {
 163                 unsigned glevels:4;
 164                 unsigned level:4;
 165                 unsigned quadrant:2;
 166                 unsigned pad_for_nice_hex_output:6;
 167                 unsigned metaphysical:1;
 168                 unsigned access:3;
 169                 unsigned invalid:1;
 170         };
 171 };
 172
 173 struct kvm_mmu_page {
 174         struct list_head link;
 175         struct hlist_node hash_link;
 176
 177         /*
 178          * The following two entries are used to key the shadow page in the
 179          * hash table.
 180          */
 181         gfn_t gfn;
 182         union kvm_mmu_page_role role;
 183
 184         u64 *spt;
 185         /* hold the gfn of each spte inside spt */
 186         gfn_t *gfns;
 187         unsigned long slot_bitmap; /* One bit set per slot which has memory
 188                                     * in this shadow page.
 189                                     */
 190         int multimapped;         /* More than one parent_pte? */
 191         int root_count;          /* Currently serving as active root */
 192         union {
 193                 u64 *parent_pte;               /* !multimapped */
 194                 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
 195         };
 196 };
 197
 198 /*
 199  * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 200  * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 201  * mode.
 202  */
 203 struct kvm_mmu {
 204         void (*new_cr3)(struct kvm_vcpu *vcpu);
 205         int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
 206         void (*free)(struct kvm_vcpu *vcpu);
 207         gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
 208         void (*prefetch_page)(struct kvm_vcpu *vcpu,
 209                               struct kvm_mmu_page *page);
 210         hpa_t root_hpa;
 211         int root_level;
 212         int shadow_root_level;
 213
 214         u64 *pae_root;
 215 };
 216
 217 struct kvm_vcpu_arch {
 218         u64 host_tsc;
 219         int interrupt_window_open;
 220         unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
 221         DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
 222         unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
 223         unsigned long rip;      /* needs vcpu_load_rsp_rip() */
 224
 225         unsigned long cr0;
 226         unsigned long cr2;
 227         unsigned long cr3;
 228         unsigned long cr4;
 229         unsigned long cr8;
 230         u64 pdptrs[4]; /* pae */
 231         u64 shadow_efer;
 232         u64 apic_base;
 233         struct kvm_lapic *apic;    /* kernel irqchip context */
 234         int mp_state;
 235         int sipi_vector;
 236         u64 ia32_misc_enable_msr;
 237         bool tpr_access_reporting;
 238
 239         struct kvm_mmu mmu;
 240
 241         struct kvm_mmu_memory_cache mmu_pte_chain_cache;
 242         struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
 243         struct kvm_mmu_memory_cache mmu_page_cache;
 244         struct kvm_mmu_memory_cache mmu_page_header_cache;
 245
 246         gfn_t last_pt_write_gfn;
 247         int   last_pt_write_count;
 248         u64  *last_pte_updated;
 249         gfn_t last_pte_gfn;
 250
 251         struct {
 252                 gfn_t gfn;      /* presumed gfn during guest pte update */
 253                 pfn_t pfn;      /* pfn corresponding to that gfn */
 254                 int largepage;
 255                 unsigned long mmu_seq;
 256         } update_pte;
 257
 258         struct i387_fxsave_struct host_fx_image;
 259         struct i387_fxsave_struct guest_fx_image;
 260
 261         gva_t mmio_fault_cr2;
 262         struct kvm_pio_request pio;
 263         void *pio_data;
 264
 265         struct kvm_queued_exception {
 266                 bool pending;
 267                 bool has_error_code;
 268                 u8 nr;
 269                 u32 error_code;
 270         } exception;
 271
 272         struct {
 273                 int active;
 274                 u8 save_iopl;
 275                 struct kvm_save_segment {
 276                         u16 selector;
 277                         unsigned long base;
 278                         u32 limit;
 279                         u32 ar;
 280                 } tr, es, ds, fs, gs;
 281         } rmode;
 282         int halt_request; /* real mode on Intel only */
 283
 284         int cpuid_nent;
 285         struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
 286         /* emulate context */
 287
 288         struct x86_emulate_ctxt emulate_ctxt;
 289
 290         gpa_t time;
 291         struct pvclock_vcpu_time_info hv_clock;
 292         unsigned int hv_clock_tsc_khz;
 293         unsigned int time_offset;
 294         struct page *time_page;
 295
 296         bool nmi_pending;
 297
 298         u64 mtrr[0x100];
 299 };
 300
 301 struct kvm_mem_alias {
 302         gfn_t base_gfn;
 303         unsigned long npages;
 304         gfn_t target_gfn;
 305 };
 306
 307 struct kvm_arch{
 308         int naliases;
 309         struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
 310
 311         unsigned int n_free_mmu_pages;
 312         unsigned int n_requested_mmu_pages;
 313         unsigned int n_alloc_mmu_pages;
 314         struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 315         /*
 316          * Hash table of struct kvm_mmu_page.
 317          */
 318         struct list_head active_mmu_pages;
 319         struct kvm_pic *vpic;
 320         struct kvm_ioapic *vioapic;
 321         struct kvm_pit *vpit;
 322
 323         int round_robin_prev_vcpu;
 324         unsigned int tss_addr;
 325         struct page *apic_access_page;
 326
 327         gpa_t wall_clock;
 328
 329         struct page *ept_identity_pagetable;
 330         bool ept_identity_pagetable_done;
 331 };
 332
 333 struct kvm_vm_stat {
 334         u32 mmu_shadow_zapped;
 335         u32 mmu_pte_write;
 336         u32 mmu_pte_updated;
 337         u32 mmu_pde_zapped;
 338         u32 mmu_flooded;
 339         u32 mmu_recycled;
 340         u32 mmu_cache_miss;
 341         u32 remote_tlb_flush;
 342         u32 lpages;
 343 };
 344
 345 struct kvm_vcpu_stat {
 346         u32 pf_fixed;
 347         u32 pf_guest;
 348         u32 tlb_flush;
 349         u32 invlpg;
 350
 351         u32 exits;
 352         u32 io_exits;
 353         u32 mmio_exits;
 354         u32 signal_exits;
 355         u32 irq_window_exits;
 356         u32 nmi_window_exits;
 357         u32 halt_exits;
 358         u32 halt_wakeup;
 359         u32 request_irq_exits;
 360         u32 irq_exits;
 361         u32 host_state_reload;
 362         u32 efer_reload;
 363         u32 fpu_reload;
 364         u32 insn_emulation;
 365         u32 insn_emulation_fail;
 366         u32 hypercalls;
 367 };
 368
 369 struct descriptor_table {
 370         u16 limit;
 371         unsigned long base;
 372 } __attribute__((packed));
 373
 374 struct kvm_x86_ops {
 375         int (*cpu_has_kvm_support)(void);          /* __init */
 376         int (*disabled_by_bios)(void);             /* __init */
 377         void (*hardware_enable)(void *dummy);      /* __init */
 378         void (*hardware_disable)(void *dummy);
 379         void (*check_processor_compatibility)(void *rtn);
 380         int (*hardware_setup)(void);               /* __init */
 381         void (*hardware_unsetup)(void);            /* __exit */
 382         bool (*cpu_has_accelerated_tpr)(void);
 383
 384         /* Create, but do not attach this VCPU */
 385         struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
 386         void (*vcpu_free)(struct kvm_vcpu *vcpu);
 387         int (*vcpu_reset)(struct kvm_vcpu *vcpu);
 388
 389         void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
 390         void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
 391         void (*vcpu_put)(struct kvm_vcpu *vcpu);
 392
 393         int (*set_guest_debug)(struct kvm_vcpu *vcpu,
 394                                struct kvm_debug_guest *dbg);
 395         void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
 396         int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
 397         int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 398         u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
 399         void (*get_segment)(struct kvm_vcpu *vcpu,
 400                             struct kvm_segment *var, int seg);
 401         int (*get_cpl)(struct kvm_vcpu *vcpu);
 402         void (*set_segment)(struct kvm_vcpu *vcpu,
 403                             struct kvm_segment *var, int seg);
 404         void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
 405         void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
 406         void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
 407         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 408         void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
 409         void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
 410         void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 411         void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 412         void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 413         void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 414         unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
 415         void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
 416                        int *exception);
 417         void (*cache_regs)(struct kvm_vcpu *vcpu);
 418         void (*decache_regs)(struct kvm_vcpu *vcpu);
 419         unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
 420         void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
 421
 422         void (*tlb_flush)(struct kvm_vcpu *vcpu);
 423
 424         void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
 425         int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
 426         void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
 427         void (*patch_hypercall)(struct kvm_vcpu *vcpu,
 428                                 unsigned char *hypercall_addr);
 429         int (*get_irq)(struct kvm_vcpu *vcpu);
 430         void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
 431         void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
 432                                 bool has_error_code, u32 error_code);
 433         bool (*exception_injected)(struct kvm_vcpu *vcpu);
 434         void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
 435         void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
 436                                        struct kvm_run *run);
 437
 438         int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
 439         int (*get_tdp_level)(void);
 440 };
 441
 442 extern struct kvm_x86_ops *kvm_x86_ops;
 443
 444 int kvm_mmu_module_init(void);
 445 void kvm_mmu_module_exit(void);
 446
 447 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 448 int kvm_mmu_create(struct kvm_vcpu *vcpu);
 449 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 450 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
 451 void kvm_mmu_set_base_ptes(u64 base_pte);
 452 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
 453                 u64 dirty_mask, u64 nx_mask, u64 x_mask);
 454
 455 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 456 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
 457 void kvm_mmu_zap_all(struct kvm *kvm);
 458 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
 459 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
 460
 461 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 462
 463 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
 464                           const void *val, int bytes);
 465 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
 466                   gpa_t addr, unsigned long *ret);
 467
 468 extern bool tdp_enabled;
 469
 470 enum emulation_result {
 471         EMULATE_DONE,       /* no further processing */
 472         EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
 473         EMULATE_FAIL,         /* can't emulate this instruction */
 474 };
 475
 476 #define EMULTYPE_NO_DECODE          (1 << 0)
 477 #define EMULTYPE_TRAP_UD            (1 << 1)
 478 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
 479                         unsigned long cr2, u16 error_code, int emulation_type);
 480 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
 481 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 482 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 483 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
 484                    unsigned long *rflags);
 485
 486 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
 487 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
 488                      unsigned long *rflags);
 489 void kvm_enable_efer_bits(u64);
 490 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
 491 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 492
 493 struct x86_emulate_ctxt;
 494
 495 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 496                      int size, unsigned port);
 497 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 498                            int size, unsigned long count, int down,
 499                             gva_t address, int rep, unsigned port);
 500 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
 501 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
 502 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
 503 int emulate_clts(struct kvm_vcpu *vcpu);
 504 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
 505                     unsigned long *dest);
 506 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
 507                     unsigned long value);
 508
 509 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
 510 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
 511                                 int type_bits, int seg);
 512
 513 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason);
 514
 515 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 516 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
 517 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
 518 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
 519 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
 520 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 521 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
 522
 523 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 524 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 525
 526 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 527 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 528 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
 529                            u32 error_code);
 530
 531 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
 532
 533 void fx_init(struct kvm_vcpu *vcpu);
 534
 535 int emulator_read_std(unsigned long addr,
 536                       void *val,
 537                       unsigned int bytes,
 538                       struct kvm_vcpu *vcpu);
 539 int emulator_write_emulated(unsigned long addr,
 540                             const void *val,
 541                             unsigned int bytes,
 542                             struct kvm_vcpu *vcpu);
 543
 544 unsigned long segment_base(u16 selector);
 545
 546 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
 547 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 548                        const u8 *new, int bytes);
 549 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 550 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 551 int kvm_mmu_load(struct kvm_vcpu *vcpu);
 552 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
 553
 554 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
 555
 556 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
 557
 558 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
 559
 560 void kvm_enable_tdp(void);
 561 void kvm_disable_tdp(void);
 562
 563 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 564 int complete_pio(struct kvm_vcpu *vcpu);
 565
 566 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
 567 {
 568         struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
 569
 570         return (struct kvm_mmu_page *)page_private(page);
 571 }
 572
 573 static inline u16 kvm_read_fs(void)
 574 {
 575         u16 seg;
 576         asm("mov %%fs, %0" : "=g"(seg));
 577         return seg;
 578 }
 579
 580 static inline u16 kvm_read_gs(void)
 581 {
 582         u16 seg;
 583         asm("mov %%gs, %0" : "=g"(seg));
 584         return seg;
 585 }
 586
 587 static inline u16 kvm_read_ldt(void)
 588 {
 589         u16 ldt;
 590         asm("sldt %0" : "=g"(ldt));
 591         return ldt;
 592 }
 593
 594 static inline void kvm_load_fs(u16 sel)
 595 {
 596         asm("mov %0, %%fs" : : "rm"(sel));
 597 }
 598
 599 static inline void kvm_load_gs(u16 sel)
 600 {
 601         asm("mov %0, %%gs" : : "rm"(sel));
 602 }
 603
 604 static inline void kvm_load_ldt(u16 sel)
 605 {
 606         asm("lldt %0" : : "rm"(sel));
 607 }
 608
 609 static inline void kvm_get_idt(struct descriptor_table *table)
 610 {
 611         asm("sidt %0" : "=m"(*table));
 612 }
 613
 614 static inline void kvm_get_gdt(struct descriptor_table *table)
 615 {
 616         asm("sgdt %0" : "=m"(*table));
 617 }
 618
 619 static inline unsigned long kvm_read_tr_base(void)
 620 {
 621         u16 tr;
 622         asm("str %0" : "=g"(tr));
 623         return segment_base(tr);
 624 }
 625
 626 #ifdef CONFIG_X86_64
 627 static inline unsigned long read_msr(unsigned long msr)
 628 {
 629         u64 value;
 630
 631         rdmsrl(msr, value);
 632         return value;
 633 }
 634 #endif
 635
 636 static inline void kvm_fx_save(struct i387_fxsave_struct *image)
 637 {
 638         asm("fxsave (%0)":: "r" (image));
 639 }
 640
 641 static inline void kvm_fx_restore(struct i387_fxsave_struct *image)
 642 {
 643         asm("fxrstor (%0)":: "r" (image));
 644 }
 645
 646 static inline void kvm_fx_finit(void)
 647 {
 648         asm("finit");
 649 }
 650
 651 static inline u32 get_rdx_init_val(void)
 652 {
 653         return 0x600; /* P6 family */
 654 }
 655
 656 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
 657 {
 658         kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
 659 }
 660
 661 #define ASM_VMX_VMCLEAR_RAX       ".byte 0x66, 0x0f, 0xc7, 0x30"
 662 #define ASM_VMX_VMLAUNCH          ".byte 0x0f, 0x01, 0xc2"
 663 #define ASM_VMX_VMRESUME          ".byte 0x0f, 0x01, 0xc3"
 664 #define ASM_VMX_VMPTRLD_RAX       ".byte 0x0f, 0xc7, 0x30"
 665 #define ASM_VMX_VMREAD_RDX_RAX    ".byte 0x0f, 0x78, 0xd0"
 666 #define ASM_VMX_VMWRITE_RAX_RDX   ".byte 0x0f, 0x79, 0xd0"
 667 #define ASM_VMX_VMWRITE_RSP_RDX   ".byte 0x0f, 0x79, 0xd4"
 668 #define ASM_VMX_VMXOFF            ".byte 0x0f, 0x01, 0xc4"
 669 #define ASM_VMX_VMXON_RAX         ".byte 0xf3, 0x0f, 0xc7, 0x30"
 670 #define ASM_VMX_INVEPT            ".byte 0x66, 0x0f, 0x38, 0x80, 0x08"
 671 #define ASM_VMX_INVVPID           ".byte 0x66, 0x0f, 0x38, 0x81, 0x08"
 672
 673 #define MSR_IA32_TIME_STAMP_COUNTER             0x010
 674
 675 #define TSS_IOPB_BASE_OFFSET 0x66
 676 #define TSS_BASE_SIZE 0x68
 677 #define TSS_IOPB_SIZE (65536 / 8)
 678 #define TSS_REDIRECTION_SIZE (256 / 8)
 679 #define RMODE_TSS_SIZE                                                  \
 680         (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
 681
 682 enum {
 683         TASK_SWITCH_CALL = 0,
 684         TASK_SWITCH_IRET = 1,
 685         TASK_SWITCH_JMP = 2,
 686         TASK_SWITCH_GATE = 3,
 687 };
 688
 689 #define KVMTRACE_5D(evt, vcpu, d1, d2, d3, d4, d5, name) \
 690         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 691                                                 vcpu, 5, d1, d2, d3, d4, d5)
 692 #define KVMTRACE_4D(evt, vcpu, d1, d2, d3, d4, name) \
 693         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 694                                                 vcpu, 4, d1, d2, d3, d4, 0)
 695 #define KVMTRACE_3D(evt, vcpu, d1, d2, d3, name) \
 696         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 697                                                 vcpu, 3, d1, d2, d3, 0, 0)
 698 #define KVMTRACE_2D(evt, vcpu, d1, d2, name) \
 699         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 700                                                 vcpu, 2, d1, d2, 0, 0, 0)
 701 #define KVMTRACE_1D(evt, vcpu, d1, name) \
 702         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 703                                                 vcpu, 1, d1, 0, 0, 0, 0)
 704 #define KVMTRACE_0D(evt, vcpu, name) \
 705         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 706                                                 vcpu, 0, 0, 0, 0, 0, 0)
 707
 708 #ifdef CONFIG_64BIT
 709 # define KVM_EX_ENTRY ".quad"
 710 # define KVM_EX_PUSH "pushq"
 711 #else
 712 # define KVM_EX_ENTRY ".long"
 713 # define KVM_EX_PUSH "pushl"
 714 #endif
 715
 716 /*
 717  * Hardware virtualization extension instructions may fault if a
 718  * reboot turns off virtualization while processes are running.
 719  * Trap the fault and ignore the instruction if that happens.
 720  */
 721 asmlinkage void kvm_handle_fault_on_reboot(void);
 722
 723 #define __kvm_handle_fault_on_reboot(insn) \
 724         "666: " insn "\n\t" \
 725         ".pushsection .text.fixup, \"ax\" \n" \
 726         "667: \n\t" \
 727         KVM_EX_PUSH " $666b \n\t" \
 728         "jmp kvm_handle_fault_on_reboot \n\t" \
 729         ".popsection \n\t" \
 730         ".pushsection __ex_table, \"a\" \n\t" \
 731         KVM_EX_ENTRY " 666b, 667b \n\t" \
 732         ".popsection"
 733
 734 #define KVM_ARCH_WANT_MMU_NOTIFIER
 735 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
 736 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
 737
 738 #endif