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 struct kvm_pv_mmu_op_buffer {
 199         void *ptr;
 200         unsigned len;
 201         unsigned processed;
 202         char buf[512] __aligned(sizeof(long));
 203 };
 204
 205 /*
 206  * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 207  * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 208  * mode.
 209  */
 210 struct kvm_mmu {
 211         void (*new_cr3)(struct kvm_vcpu *vcpu);
 212         int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
 213         void (*free)(struct kvm_vcpu *vcpu);
 214         gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
 215         void (*prefetch_page)(struct kvm_vcpu *vcpu,
 216                               struct kvm_mmu_page *page);
 217         hpa_t root_hpa;
 218         int root_level;
 219         int shadow_root_level;
 220
 221         u64 *pae_root;
 222 };
 223
 224 struct kvm_vcpu_arch {
 225         u64 host_tsc;
 226         int interrupt_window_open;
 227         unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
 228         DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
 229         unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
 230         unsigned long rip;      /* needs vcpu_load_rsp_rip() */
 231
 232         unsigned long cr0;
 233         unsigned long cr2;
 234         unsigned long cr3;
 235         unsigned long cr4;
 236         unsigned long cr8;
 237         u64 pdptrs[4]; /* pae */
 238         u64 shadow_efer;
 239         u64 apic_base;
 240         struct kvm_lapic *apic;    /* kernel irqchip context */
 241         int mp_state;
 242         int sipi_vector;
 243         u64 ia32_misc_enable_msr;
 244         bool tpr_access_reporting;
 245
 246         struct kvm_mmu mmu;
 247         /* only needed in kvm_pv_mmu_op() path, but it's hot so
 248          * put it here to avoid allocation */
 249         struct kvm_pv_mmu_op_buffer mmu_op_buffer;
 250
 251         struct kvm_mmu_memory_cache mmu_pte_chain_cache;
 252         struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
 253         struct kvm_mmu_memory_cache mmu_page_cache;
 254         struct kvm_mmu_memory_cache mmu_page_header_cache;
 255
 256         gfn_t last_pt_write_gfn;
 257         int   last_pt_write_count;
 258         u64  *last_pte_updated;
 259         gfn_t last_pte_gfn;
 260
 261         struct {
 262                 gfn_t gfn;      /* presumed gfn during guest pte update */
 263                 pfn_t pfn;      /* pfn corresponding to that gfn */
 264                 int largepage;
 265                 unsigned long mmu_seq;
 266         } update_pte;
 267
 268         struct i387_fxsave_struct host_fx_image;
 269         struct i387_fxsave_struct guest_fx_image;
 270
 271         gva_t mmio_fault_cr2;
 272         struct kvm_pio_request pio;
 273         void *pio_data;
 274
 275         struct kvm_queued_exception {
 276                 bool pending;
 277                 bool has_error_code;
 278                 u8 nr;
 279                 u32 error_code;
 280         } exception;
 281
 282         struct {
 283                 int active;
 284                 u8 save_iopl;
 285                 struct kvm_save_segment {
 286                         u16 selector;
 287                         unsigned long base;
 288                         u32 limit;
 289                         u32 ar;
 290                 } tr, es, ds, fs, gs;
 291         } rmode;
 292         int halt_request; /* real mode on Intel only */
 293
 294         int cpuid_nent;
 295         struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
 296         /* emulate context */
 297
 298         struct x86_emulate_ctxt emulate_ctxt;
 299
 300         gpa_t time;
 301         struct pvclock_vcpu_time_info hv_clock;
 302         unsigned int hv_clock_tsc_khz;
 303         unsigned int time_offset;
 304         struct page *time_page;
 305
 306         bool nmi_pending;
 307
 308         u64 mtrr[0x100];
 309 };
 310
 311 struct kvm_mem_alias {
 312         gfn_t base_gfn;
 313         unsigned long npages;
 314         gfn_t target_gfn;
 315 };
 316
 317 struct kvm_arch{
 318         int naliases;
 319         struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
 320
 321         unsigned int n_free_mmu_pages;
 322         unsigned int n_requested_mmu_pages;
 323         unsigned int n_alloc_mmu_pages;
 324         struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 325         /*
 326          * Hash table of struct kvm_mmu_page.
 327          */
 328         struct list_head active_mmu_pages;
 329         struct kvm_pic *vpic;
 330         struct kvm_ioapic *vioapic;
 331         struct kvm_pit *vpit;
 332
 333         int round_robin_prev_vcpu;
 334         unsigned int tss_addr;
 335         struct page *apic_access_page;
 336
 337         gpa_t wall_clock;
 338
 339         struct page *ept_identity_pagetable;
 340         bool ept_identity_pagetable_done;
 341 };
 342
 343 struct kvm_vm_stat {
 344         u32 mmu_shadow_zapped;
 345         u32 mmu_pte_write;
 346         u32 mmu_pte_updated;
 347         u32 mmu_pde_zapped;
 348         u32 mmu_flooded;
 349         u32 mmu_recycled;
 350         u32 mmu_cache_miss;
 351         u32 remote_tlb_flush;
 352         u32 lpages;
 353 };
 354
 355 struct kvm_vcpu_stat {
 356         u32 pf_fixed;
 357         u32 pf_guest;
 358         u32 tlb_flush;
 359         u32 invlpg;
 360
 361         u32 exits;
 362         u32 io_exits;
 363         u32 mmio_exits;
 364         u32 signal_exits;
 365         u32 irq_window_exits;
 366         u32 nmi_window_exits;
 367         u32 halt_exits;
 368         u32 halt_wakeup;
 369         u32 request_irq_exits;
 370         u32 irq_exits;
 371         u32 host_state_reload;
 372         u32 efer_reload;
 373         u32 fpu_reload;
 374         u32 insn_emulation;
 375         u32 insn_emulation_fail;
 376         u32 hypercalls;
 377 };
 378
 379 struct descriptor_table {
 380         u16 limit;
 381         unsigned long base;
 382 } __attribute__((packed));
 383
 384 struct kvm_x86_ops {
 385         int (*cpu_has_kvm_support)(void);          /* __init */
 386         int (*disabled_by_bios)(void);             /* __init */
 387         void (*hardware_enable)(void *dummy);      /* __init */
 388         void (*hardware_disable)(void *dummy);
 389         void (*check_processor_compatibility)(void *rtn);
 390         int (*hardware_setup)(void);               /* __init */
 391         void (*hardware_unsetup)(void);            /* __exit */
 392         bool (*cpu_has_accelerated_tpr)(void);
 393
 394         /* Create, but do not attach this VCPU */
 395         struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
 396         void (*vcpu_free)(struct kvm_vcpu *vcpu);
 397         int (*vcpu_reset)(struct kvm_vcpu *vcpu);
 398
 399         void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
 400         void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
 401         void (*vcpu_put)(struct kvm_vcpu *vcpu);
 402
 403         int (*set_guest_debug)(struct kvm_vcpu *vcpu,
 404                                struct kvm_debug_guest *dbg);
 405         void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
 406         int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
 407         int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 408         u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
 409         void (*get_segment)(struct kvm_vcpu *vcpu,
 410                             struct kvm_segment *var, int seg);
 411         int (*get_cpl)(struct kvm_vcpu *vcpu);
 412         void (*set_segment)(struct kvm_vcpu *vcpu,
 413                             struct kvm_segment *var, int seg);
 414         void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
 415         void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
 416         void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
 417         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 418         void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
 419         void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
 420         void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 421         void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 422         void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 423         void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 424         unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
 425         void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
 426                        int *exception);
 427         void (*cache_regs)(struct kvm_vcpu *vcpu);
 428         void (*decache_regs)(struct kvm_vcpu *vcpu);
 429         unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
 430         void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
 431
 432         void (*tlb_flush)(struct kvm_vcpu *vcpu);
 433
 434         void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
 435         int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
 436         void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
 437         void (*patch_hypercall)(struct kvm_vcpu *vcpu,
 438                                 unsigned char *hypercall_addr);
 439         int (*get_irq)(struct kvm_vcpu *vcpu);
 440         void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
 441         void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
 442                                 bool has_error_code, u32 error_code);
 443         bool (*exception_injected)(struct kvm_vcpu *vcpu);
 444         void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
 445         void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
 446                                        struct kvm_run *run);
 447
 448         int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
 449         int (*get_tdp_level)(void);
 450 };
 451
 452 extern struct kvm_x86_ops *kvm_x86_ops;
 453
 454 int kvm_mmu_module_init(void);
 455 void kvm_mmu_module_exit(void);
 456
 457 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 458 int kvm_mmu_create(struct kvm_vcpu *vcpu);
 459 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 460 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
 461 void kvm_mmu_set_base_ptes(u64 base_pte);
 462 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
 463                 u64 dirty_mask, u64 nx_mask, u64 x_mask);
 464
 465 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 466 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
 467 void kvm_mmu_zap_all(struct kvm *kvm);
 468 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
 469 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
 470
 471 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 472
 473 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
 474                           const void *val, int bytes);
 475 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
 476                   gpa_t addr, unsigned long *ret);
 477
 478 extern bool tdp_enabled;
 479
 480 enum emulation_result {
 481         EMULATE_DONE,       /* no further processing */
 482         EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
 483         EMULATE_FAIL,         /* can't emulate this instruction */
 484 };
 485
 486 #define EMULTYPE_NO_DECODE          (1 << 0)
 487 #define EMULTYPE_TRAP_UD            (1 << 1)
 488 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
 489                         unsigned long cr2, u16 error_code, int emulation_type);
 490 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
 491 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 492 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 493 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
 494                    unsigned long *rflags);
 495
 496 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
 497 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
 498                      unsigned long *rflags);
 499 void kvm_enable_efer_bits(u64);
 500 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
 501 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 502
 503 struct x86_emulate_ctxt;
 504
 505 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 506                      int size, unsigned port);
 507 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 508                            int size, unsigned long count, int down,
 509                             gva_t address, int rep, unsigned port);
 510 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
 511 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
 512 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
 513 int emulate_clts(struct kvm_vcpu *vcpu);
 514 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
 515                     unsigned long *dest);
 516 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
 517                     unsigned long value);
 518
 519 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
 520 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
 521                                 int type_bits, int seg);
 522
 523 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason);
 524
 525 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 526 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
 527 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
 528 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
 529 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
 530 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 531 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
 532
 533 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 534 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 535
 536 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 537 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 538 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
 539                            u32 error_code);
 540 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl);
 541
 542 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
 543
 544 void fx_init(struct kvm_vcpu *vcpu);
 545
 546 int emulator_read_std(unsigned long addr,
 547                       void *val,
 548                       unsigned int bytes,
 549                       struct kvm_vcpu *vcpu);
 550 int emulator_write_emulated(unsigned long addr,
 551                             const void *val,
 552                             unsigned int bytes,
 553                             struct kvm_vcpu *vcpu);
 554
 555 unsigned long segment_base(u16 selector);
 556
 557 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
 558 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 559                        const u8 *new, int bytes);
 560 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 561 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 562 int kvm_mmu_load(struct kvm_vcpu *vcpu);
 563 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
 564
 565 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
 566
 567 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
 568
 569 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
 570
 571 void kvm_enable_tdp(void);
 572 void kvm_disable_tdp(void);
 573
 574 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 575 int complete_pio(struct kvm_vcpu *vcpu);
 576
 577 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
 578 {
 579         struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
 580
 581         return (struct kvm_mmu_page *)page_private(page);
 582 }
 583
 584 static inline u16 kvm_read_fs(void)
 585 {
 586         u16 seg;
 587         asm("mov %%fs, %0" : "=g"(seg));
 588         return seg;
 589 }
 590
 591 static inline u16 kvm_read_gs(void)
 592 {
 593         u16 seg;
 594         asm("mov %%gs, %0" : "=g"(seg));
 595         return seg;
 596 }
 597
 598 static inline u16 kvm_read_ldt(void)
 599 {
 600         u16 ldt;
 601         asm("sldt %0" : "=g"(ldt));
 602         return ldt;
 603 }
 604
 605 static inline void kvm_load_fs(u16 sel)
 606 {
 607         asm("mov %0, %%fs" : : "rm"(sel));
 608 }
 609
 610 static inline void kvm_load_gs(u16 sel)
 611 {
 612         asm("mov %0, %%gs" : : "rm"(sel));
 613 }
 614
 615 static inline void kvm_load_ldt(u16 sel)
 616 {
 617         asm("lldt %0" : : "rm"(sel));
 618 }
 619
 620 static inline void kvm_get_idt(struct descriptor_table *table)
 621 {
 622         asm("sidt %0" : "=m"(*table));
 623 }
 624
 625 static inline void kvm_get_gdt(struct descriptor_table *table)
 626 {
 627         asm("sgdt %0" : "=m"(*table));
 628 }
 629
 630 static inline unsigned long kvm_read_tr_base(void)
 631 {
 632         u16 tr;
 633         asm("str %0" : "=g"(tr));
 634         return segment_base(tr);
 635 }
 636
 637 #ifdef CONFIG_X86_64
 638 static inline unsigned long read_msr(unsigned long msr)
 639 {
 640         u64 value;
 641
 642         rdmsrl(msr, value);
 643         return value;
 644 }
 645 #endif
 646
 647 static inline void kvm_fx_save(struct i387_fxsave_struct *image)
 648 {
 649         asm("fxsave (%0)":: "r" (image));
 650 }
 651
 652 static inline void kvm_fx_restore(struct i387_fxsave_struct *image)
 653 {
 654         asm("fxrstor (%0)":: "r" (image));
 655 }
 656
 657 static inline void kvm_fx_finit(void)
 658 {
 659         asm("finit");
 660 }
 661
 662 static inline u32 get_rdx_init_val(void)
 663 {
 664         return 0x600; /* P6 family */
 665 }
 666
 667 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
 668 {
 669         kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
 670 }
 671
 672 #define ASM_VMX_VMCLEAR_RAX       ".byte 0x66, 0x0f, 0xc7, 0x30"
 673 #define ASM_VMX_VMLAUNCH          ".byte 0x0f, 0x01, 0xc2"
 674 #define ASM_VMX_VMRESUME          ".byte 0x0f, 0x01, 0xc3"
 675 #define ASM_VMX_VMPTRLD_RAX       ".byte 0x0f, 0xc7, 0x30"
 676 #define ASM_VMX_VMREAD_RDX_RAX    ".byte 0x0f, 0x78, 0xd0"
 677 #define ASM_VMX_VMWRITE_RAX_RDX   ".byte 0x0f, 0x79, 0xd0"
 678 #define ASM_VMX_VMWRITE_RSP_RDX   ".byte 0x0f, 0x79, 0xd4"
 679 #define ASM_VMX_VMXOFF            ".byte 0x0f, 0x01, 0xc4"
 680 #define ASM_VMX_VMXON_RAX         ".byte 0xf3, 0x0f, 0xc7, 0x30"
 681 #define ASM_VMX_INVEPT            ".byte 0x66, 0x0f, 0x38, 0x80, 0x08"
 682 #define ASM_VMX_INVVPID           ".byte 0x66, 0x0f, 0x38, 0x81, 0x08"
 683
 684 #define MSR_IA32_TIME_STAMP_COUNTER             0x010
 685
 686 #define TSS_IOPB_BASE_OFFSET 0x66
 687 #define TSS_BASE_SIZE 0x68
 688 #define TSS_IOPB_SIZE (65536 / 8)
 689 #define TSS_REDIRECTION_SIZE (256 / 8)
 690 #define RMODE_TSS_SIZE                                                  \
 691         (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
 692
 693 enum {
 694         TASK_SWITCH_CALL = 0,
 695         TASK_SWITCH_IRET = 1,
 696         TASK_SWITCH_JMP = 2,
 697         TASK_SWITCH_GATE = 3,
 698 };
 699
 700 #define KVMTRACE_5D(evt, vcpu, d1, d2, d3, d4, d5, name) \
 701         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 702                                                 vcpu, 5, d1, d2, d3, d4, d5)
 703 #define KVMTRACE_4D(evt, vcpu, d1, d2, d3, d4, name) \
 704         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 705                                                 vcpu, 4, d1, d2, d3, d4, 0)
 706 #define KVMTRACE_3D(evt, vcpu, d1, d2, d3, name) \
 707         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 708                                                 vcpu, 3, d1, d2, d3, 0, 0)
 709 #define KVMTRACE_2D(evt, vcpu, d1, d2, name) \
 710         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 711                                                 vcpu, 2, d1, d2, 0, 0, 0)
 712 #define KVMTRACE_1D(evt, vcpu, d1, name) \
 713         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 714                                                 vcpu, 1, d1, 0, 0, 0, 0)
 715 #define KVMTRACE_0D(evt, vcpu, name) \
 716         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 717                                                 vcpu, 0, 0, 0, 0, 0, 0)
 718
 719 #ifdef CONFIG_64BIT
 720 # define KVM_EX_ENTRY ".quad"
 721 # define KVM_EX_PUSH "pushq"
 722 #else
 723 # define KVM_EX_ENTRY ".long"
 724 # define KVM_EX_PUSH "pushl"
 725 #endif
 726
 727 /*
 728  * Hardware virtualization extension instructions may fault if a
 729  * reboot turns off virtualization while processes are running.
 730  * Trap the fault and ignore the instruction if that happens.
 731  */
 732 asmlinkage void kvm_handle_fault_on_reboot(void);
 733
 734 #define __kvm_handle_fault_on_reboot(insn) \
 735         "666: " insn "\n\t" \
 736         ".pushsection .fixup, \"ax\" \n" \
 737         "667: \n\t" \
 738         KVM_EX_PUSH " $666b \n\t" \
 739         "jmp kvm_handle_fault_on_reboot \n\t" \
 740         ".popsection \n\t" \
 741         ".pushsection __ex_table, \"a\" \n\t" \
 742         KVM_EX_ENTRY " 666b, 667b \n\t" \
 743         ".popsection"
 744
 745 #define KVM_ARCH_WANT_MMU_NOTIFIER
 746 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
 747 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
 748
 749 #endif