include/asm-x86/kvm_host.h

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