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 #include <linux/tracepoint.h>
  18 #include <linux/cpumask.h>
  19 #include <linux/irq_work.h>
  20
  21 #include <linux/kvm.h>
  22 #include <linux/kvm_para.h>
  23 #include <linux/kvm_types.h>
  24 #include <linux/perf_event.h>
  25
  26 #include <asm/pvclock-abi.h>
  27 #include <asm/desc.h>
  28 #include <asm/mtrr.h>
  29 #include <asm/msr-index.h>
  30 #include <asm/asm.h>
  31
  32 #define KVM_MAX_VCPUS 254
  33 #define KVM_SOFT_MAX_VCPUS 160
  34 #define KVM_MEMORY_SLOTS 32
  35 /* memory slots that does not exposed to userspace */
  36 #define KVM_PRIVATE_MEM_SLOTS 4
  37 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
  38
  39 #define KVM_MMIO_SIZE 16
  40
  41 #define KVM_PIO_PAGE_OFFSET 1
  42 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2
  43
  44 #define CR0_RESERVED_BITS                                               \
  45         (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
  46                           | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
  47                           | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
  48
  49 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
  50 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
  51 #define CR3_PCID_ENABLED_RESERVED_BITS 0xFFFFFF0000000000ULL
  52 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS |    \
  53                                   0xFFFFFF0000000000ULL)
  54 #define CR4_RESERVED_BITS                                               \
  55         (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
  56                           | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE     \
  57                           | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR | X86_CR4_PCIDE \
  58                           | X86_CR4_OSXSAVE | X86_CR4_SMEP | X86_CR4_RDWRGSFS \
  59                           | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
  60
  61 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
  62
  63
  64
  65 #define INVALID_PAGE (~(hpa_t)0)
  66 #define VALID_PAGE(x) ((x) != INVALID_PAGE)
  67
  68 #define UNMAPPED_GVA (~(gpa_t)0)
  69
  70 /* KVM Hugepage definitions for x86 */
  71 #define KVM_NR_PAGE_SIZES       3
  72 #define KVM_HPAGE_GFN_SHIFT(x)  (((x) - 1) * 9)
  73 #define KVM_HPAGE_SHIFT(x)      (PAGE_SHIFT + KVM_HPAGE_GFN_SHIFT(x))
  74 #define KVM_HPAGE_SIZE(x)       (1UL << KVM_HPAGE_SHIFT(x))
  75 #define KVM_HPAGE_MASK(x)       (~(KVM_HPAGE_SIZE(x) - 1))
  76 #define KVM_PAGES_PER_HPAGE(x)  (KVM_HPAGE_SIZE(x) / PAGE_SIZE)
  77
  78 #define DE_VECTOR 0
  79 #define DB_VECTOR 1
  80 #define BP_VECTOR 3
  81 #define OF_VECTOR 4
  82 #define BR_VECTOR 5
  83 #define UD_VECTOR 6
  84 #define NM_VECTOR 7
  85 #define DF_VECTOR 8
  86 #define TS_VECTOR 10
  87 #define NP_VECTOR 11
  88 #define SS_VECTOR 12
  89 #define GP_VECTOR 13
  90 #define PF_VECTOR 14
  91 #define MF_VECTOR 16
  92 #define MC_VECTOR 18
  93
  94 #define SELECTOR_TI_MASK (1 << 2)
  95 #define SELECTOR_RPL_MASK 0x03
  96
  97 #define IOPL_SHIFT 12
  98
  99 #define KVM_PERMILLE_MMU_PAGES 20
 100 #define KVM_MIN_ALLOC_MMU_PAGES 64
 101 #define KVM_MMU_HASH_SHIFT 10
 102 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
 103 #define KVM_MIN_FREE_MMU_PAGES 5
 104 #define KVM_REFILL_PAGES 25
 105 #define KVM_MAX_CPUID_ENTRIES 80
 106 #define KVM_NR_FIXED_MTRR_REGION 88
 107 #define KVM_NR_VAR_MTRR 8
 108
 109 #define ASYNC_PF_PER_VCPU 64
 110
 111 extern raw_spinlock_t kvm_lock;
 112 extern struct list_head vm_list;
 113
 114 struct kvm_vcpu;
 115 struct kvm;
 116 struct kvm_async_pf;
 117
 118 enum kvm_reg {
 119         VCPU_REGS_RAX = 0,
 120         VCPU_REGS_RCX = 1,
 121         VCPU_REGS_RDX = 2,
 122         VCPU_REGS_RBX = 3,
 123         VCPU_REGS_RSP = 4,
 124         VCPU_REGS_RBP = 5,
 125         VCPU_REGS_RSI = 6,
 126         VCPU_REGS_RDI = 7,
 127 #ifdef CONFIG_X86_64
 128         VCPU_REGS_R8 = 8,
 129         VCPU_REGS_R9 = 9,
 130         VCPU_REGS_R10 = 10,
 131         VCPU_REGS_R11 = 11,
 132         VCPU_REGS_R12 = 12,
 133         VCPU_REGS_R13 = 13,
 134         VCPU_REGS_R14 = 14,
 135         VCPU_REGS_R15 = 15,
 136 #endif
 137         VCPU_REGS_RIP,
 138         NR_VCPU_REGS
 139 };
 140
 141 enum kvm_reg_ex {
 142         VCPU_EXREG_PDPTR = NR_VCPU_REGS,
 143         VCPU_EXREG_CR3,
 144         VCPU_EXREG_RFLAGS,
 145         VCPU_EXREG_CPL,
 146         VCPU_EXREG_SEGMENTS,
 147 };
 148
 149 enum {
 150         VCPU_SREG_ES,
 151         VCPU_SREG_CS,
 152         VCPU_SREG_SS,
 153         VCPU_SREG_DS,
 154         VCPU_SREG_FS,
 155         VCPU_SREG_GS,
 156         VCPU_SREG_TR,
 157         VCPU_SREG_LDTR,
 158 };
 159
 160 #include <asm/kvm_emulate.h>
 161
 162 #define KVM_NR_MEM_OBJS 40
 163
 164 #define KVM_NR_DB_REGS  4
 165
 166 #define DR6_BD          (1 << 13)
 167 #define DR6_BS          (1 << 14)
 168 #define DR6_FIXED_1     0xffff0ff0
 169 #define DR6_VOLATILE    0x0000e00f
 170
 171 #define DR7_BP_EN_MASK  0x000000ff
 172 #define DR7_GE          (1 << 9)
 173 #define DR7_GD          (1 << 13)
 174 #define DR7_FIXED_1     0x00000400
 175 #define DR7_VOLATILE    0xffff23ff
 176
 177 /* apic attention bits */
 178 #define KVM_APIC_CHECK_VAPIC    0
 179 /*
 180  * The following bit is set with PV-EOI, unset on EOI.
 181  * We detect PV-EOI changes by guest by comparing
 182  * this bit with PV-EOI in guest memory.
 183  * See the implementation in apic_update_pv_eoi.
 184  */
 185 #define KVM_APIC_PV_EOI_PENDING 1
 186
 187 /*
 188  * We don't want allocation failures within the mmu code, so we preallocate
 189  * enough memory for a single page fault in a cache.
 190  */
 191 struct kvm_mmu_memory_cache {
 192         int nobjs;
 193         void *objects[KVM_NR_MEM_OBJS];
 194 };
 195
 196 /*
 197  * kvm_mmu_page_role, below, is defined as:
 198  *
 199  *   bits 0:3 - total guest paging levels (2-4, or zero for real mode)
 200  *   bits 4:7 - page table level for this shadow (1-4)
 201  *   bits 8:9 - page table quadrant for 2-level guests
 202  *   bit   16 - direct mapping of virtual to physical mapping at gfn
 203  *              used for real mode and two-dimensional paging
 204  *   bits 17:19 - common access permissions for all ptes in this shadow page
 205  */
 206 union kvm_mmu_page_role {
 207         unsigned word;
 208         struct {
 209                 unsigned level:4;
 210                 unsigned cr4_pae:1;
 211                 unsigned quadrant:2;
 212                 unsigned pad_for_nice_hex_output:6;
 213                 unsigned direct:1;
 214                 unsigned access:3;
 215                 unsigned invalid:1;
 216                 unsigned nxe:1;
 217                 unsigned cr0_wp:1;
 218                 unsigned smep_andnot_wp:1;
 219         };
 220 };
 221
 222 struct kvm_mmu_page {
 223         struct list_head link;
 224         struct hlist_node hash_link;
 225
 226         /*
 227          * The following two entries are used to key the shadow page in the
 228          * hash table.
 229          */
 230         gfn_t gfn;
 231         union kvm_mmu_page_role role;
 232
 233         u64 *spt;
 234         /* hold the gfn of each spte inside spt */
 235         gfn_t *gfns;
 236         /*
 237          * One bit set per slot which has memory
 238          * in this shadow page.
 239          */
 240         DECLARE_BITMAP(slot_bitmap, KVM_MEM_SLOTS_NUM);
 241         bool unsync;
 242         int root_count;          /* Currently serving as active root */
 243         unsigned int unsync_children;
 244         unsigned long parent_ptes;      /* Reverse mapping for parent_pte */
 245         DECLARE_BITMAP(unsync_child_bitmap, 512);
 246
 247 #ifdef CONFIG_X86_32
 248         int clear_spte_count;
 249 #endif
 250
 251         int write_flooding_count;
 252 };
 253
 254 struct kvm_pio_request {
 255         unsigned long count;
 256         int in;
 257         int port;
 258         int size;
 259 };
 260
 261 /*
 262  * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 263  * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 264  * mode.
 265  */
 266 struct kvm_mmu {
 267         void (*new_cr3)(struct kvm_vcpu *vcpu);
 268         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root);
 269         unsigned long (*get_cr3)(struct kvm_vcpu *vcpu);
 270         u64 (*get_pdptr)(struct kvm_vcpu *vcpu, int index);
 271         int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err,
 272                           bool prefault);
 273         void (*inject_page_fault)(struct kvm_vcpu *vcpu,
 274                                   struct x86_exception *fault);
 275         void (*free)(struct kvm_vcpu *vcpu);
 276         gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access,
 277                             struct x86_exception *exception);
 278         gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access);
 279         int (*sync_page)(struct kvm_vcpu *vcpu,
 280                          struct kvm_mmu_page *sp);
 281         void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
 282         void (*update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
 283                            u64 *spte, const void *pte);
 284         hpa_t root_hpa;
 285         int root_level;
 286         int shadow_root_level;
 287         union kvm_mmu_page_role base_role;
 288         bool direct_map;
 289
 290         u64 *pae_root;
 291         u64 *lm_root;
 292         u64 rsvd_bits_mask[2][4];
 293
 294         bool nx;
 295
 296         u64 pdptrs[4]; /* pae */
 297 };
 298
 299 enum pmc_type {
 300         KVM_PMC_GP = 0,
 301         KVM_PMC_FIXED,
 302 };
 303
 304 struct kvm_pmc {
 305         enum pmc_type type;
 306         u8 idx;
 307         u64 counter;
 308         u64 eventsel;
 309         struct perf_event *perf_event;
 310         struct kvm_vcpu *vcpu;
 311 };
 312
 313 struct kvm_pmu {
 314         unsigned nr_arch_gp_counters;
 315         unsigned nr_arch_fixed_counters;
 316         unsigned available_event_types;
 317         u64 fixed_ctr_ctrl;
 318         u64 global_ctrl;
 319         u64 global_status;
 320         u64 global_ovf_ctrl;
 321         u64 counter_bitmask[2];
 322         u64 global_ctrl_mask;
 323         u8 version;
 324         struct kvm_pmc gp_counters[X86_PMC_MAX_GENERIC];
 325         struct kvm_pmc fixed_counters[X86_PMC_MAX_FIXED];
 326         struct irq_work irq_work;
 327         u64 reprogram_pmi;
 328 };
 329
 330 struct kvm_vcpu_arch {
 331         /*
 332          * rip and regs accesses must go through
 333          * kvm_{register,rip}_{read,write} functions.
 334          */
 335         unsigned long regs[NR_VCPU_REGS];
 336         u32 regs_avail;
 337         u32 regs_dirty;
 338
 339         unsigned long cr0;
 340         unsigned long cr0_guest_owned_bits;
 341         unsigned long cr2;
 342         unsigned long cr3;
 343         unsigned long cr4;
 344         unsigned long cr4_guest_owned_bits;
 345         unsigned long cr8;
 346         u32 hflags;
 347         u64 efer;
 348         u64 apic_base;
 349         struct kvm_lapic *apic;    /* kernel irqchip context */
 350         unsigned long apic_attention;
 351         int32_t apic_arb_prio;
 352         int mp_state;
 353         int sipi_vector;
 354         u64 ia32_misc_enable_msr;
 355         bool tpr_access_reporting;
 356
 357         /*
 358          * Paging state of the vcpu
 359          *
 360          * If the vcpu runs in guest mode with two level paging this still saves
 361          * the paging mode of the l1 guest. This context is always used to
 362          * handle faults.
 363          */
 364         struct kvm_mmu mmu;
 365
 366         /*
 367          * Paging state of an L2 guest (used for nested npt)
 368          *
 369          * This context will save all necessary information to walk page tables
 370          * of the an L2 guest. This context is only initialized for page table
 371          * walking and not for faulting since we never handle l2 page faults on
 372          * the host.
 373          */
 374         struct kvm_mmu nested_mmu;
 375
 376         /*
 377          * Pointer to the mmu context currently used for
 378          * gva_to_gpa translations.
 379          */
 380         struct kvm_mmu *walk_mmu;
 381
 382         struct kvm_mmu_memory_cache mmu_pte_list_desc_cache;
 383         struct kvm_mmu_memory_cache mmu_page_cache;
 384         struct kvm_mmu_memory_cache mmu_page_header_cache;
 385
 386         struct fpu guest_fpu;
 387         u64 xcr0;
 388
 389         struct kvm_pio_request pio;
 390         void *pio_data;
 391
 392         u8 event_exit_inst_len;
 393
 394         struct kvm_queued_exception {
 395                 bool pending;
 396                 bool has_error_code;
 397                 bool reinject;
 398                 u8 nr;
 399                 u32 error_code;
 400         } exception;
 401
 402         struct kvm_queued_interrupt {
 403                 bool pending;
 404                 bool soft;
 405                 u8 nr;
 406         } interrupt;
 407
 408         int halt_request; /* real mode on Intel only */
 409
 410         int cpuid_nent;
 411         struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
 412         /* emulate context */
 413
 414         struct x86_emulate_ctxt emulate_ctxt;
 415         bool emulate_regs_need_sync_to_vcpu;
 416         bool emulate_regs_need_sync_from_vcpu;
 417
 418         gpa_t time;
 419         struct pvclock_vcpu_time_info hv_clock;
 420         unsigned int hw_tsc_khz;
 421         unsigned int time_offset;
 422         struct page *time_page;
 423
 424         struct {
 425                 u64 msr_val;
 426                 u64 last_steal;
 427                 u64 accum_steal;
 428                 struct gfn_to_hva_cache stime;
 429                 struct kvm_steal_time steal;
 430         } st;
 431
 432         u64 last_guest_tsc;
 433         u64 last_kernel_ns;
 434         u64 last_host_tsc;
 435         u64 tsc_offset_adjustment;
 436         u64 this_tsc_nsec;
 437         u64 this_tsc_write;
 438         u8  this_tsc_generation;
 439         bool tsc_catchup;
 440         bool tsc_always_catchup;
 441         s8 virtual_tsc_shift;
 442         u32 virtual_tsc_mult;
 443         u32 virtual_tsc_khz;
 444
 445         atomic_t nmi_queued;  /* unprocessed asynchronous NMIs */
 446         unsigned nmi_pending; /* NMI queued after currently running handler */
 447         bool nmi_injected;    /* Trying to inject an NMI this entry */
 448
 449         struct mtrr_state_type mtrr_state;
 450         u32 pat;
 451
 452         int switch_db_regs;
 453         unsigned long db[KVM_NR_DB_REGS];
 454         unsigned long dr6;
 455         unsigned long dr7;
 456         unsigned long eff_db[KVM_NR_DB_REGS];
 457
 458         u64 mcg_cap;
 459         u64 mcg_status;
 460         u64 mcg_ctl;
 461         u64 *mce_banks;
 462
 463         /* Cache MMIO info */
 464         u64 mmio_gva;
 465         unsigned access;
 466         gfn_t mmio_gfn;
 467
 468         struct kvm_pmu pmu;
 469
 470         /* used for guest single stepping over the given code position */
 471         unsigned long singlestep_rip;
 472
 473         /* fields used by HYPER-V emulation */
 474         u64 hv_vapic;
 475
 476         cpumask_var_t wbinvd_dirty_mask;
 477
 478         unsigned long last_retry_eip;
 479         unsigned long last_retry_addr;
 480
 481         struct {
 482                 bool halted;
 483                 gfn_t gfns[roundup_pow_of_two(ASYNC_PF_PER_VCPU)];
 484                 struct gfn_to_hva_cache data;
 485                 u64 msr_val;
 486                 u32 id;
 487                 bool send_user_only;
 488         } apf;
 489
 490         /* OSVW MSRs (AMD only) */
 491         struct {
 492                 u64 length;
 493                 u64 status;
 494         } osvw;
 495
 496         struct {
 497                 u64 msr_val;
 498                 struct gfn_to_hva_cache data;
 499         } pv_eoi;
 500 };
 501
 502 struct kvm_lpage_info {
 503         unsigned long rmap_pde;
 504         int write_count;
 505 };
 506
 507 struct kvm_arch_memory_slot {
 508         struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1];
 509 };
 510
 511 struct kvm_arch {
 512         unsigned int n_used_mmu_pages;
 513         unsigned int n_requested_mmu_pages;
 514         unsigned int n_max_mmu_pages;
 515         unsigned int indirect_shadow_pages;
 516         struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 517         /*
 518          * Hash table of struct kvm_mmu_page.
 519          */
 520         struct list_head active_mmu_pages;
 521         struct list_head assigned_dev_head;
 522         struct iommu_domain *iommu_domain;
 523         int iommu_flags;
 524         struct kvm_pic *vpic;
 525         struct kvm_ioapic *vioapic;
 526         struct kvm_pit *vpit;
 527         int vapics_in_nmi_mode;
 528
 529         unsigned int tss_addr;
 530         struct page *apic_access_page;
 531
 532         gpa_t wall_clock;
 533
 534         struct page *ept_identity_pagetable;
 535         bool ept_identity_pagetable_done;
 536         gpa_t ept_identity_map_addr;
 537
 538         unsigned long irq_sources_bitmap;
 539         s64 kvmclock_offset;
 540         raw_spinlock_t tsc_write_lock;
 541         u64 last_tsc_nsec;
 542         u64 last_tsc_write;
 543         u32 last_tsc_khz;
 544         u64 cur_tsc_nsec;
 545         u64 cur_tsc_write;
 546         u64 cur_tsc_offset;
 547         u8  cur_tsc_generation;
 548
 549         struct kvm_xen_hvm_config xen_hvm_config;
 550
 551         /* fields used by HYPER-V emulation */
 552         u64 hv_guest_os_id;
 553         u64 hv_hypercall;
 554
 555         #ifdef CONFIG_KVM_MMU_AUDIT
 556         int audit_point;
 557         #endif
 558 };
 559
 560 struct kvm_vm_stat {
 561         u32 mmu_shadow_zapped;
 562         u32 mmu_pte_write;
 563         u32 mmu_pte_updated;
 564         u32 mmu_pde_zapped;
 565         u32 mmu_flooded;
 566         u32 mmu_recycled;
 567         u32 mmu_cache_miss;
 568         u32 mmu_unsync;
 569         u32 remote_tlb_flush;
 570         u32 lpages;
 571 };
 572
 573 struct kvm_vcpu_stat {
 574         u32 pf_fixed;
 575         u32 pf_guest;
 576         u32 tlb_flush;
 577         u32 invlpg;
 578
 579         u32 exits;
 580         u32 io_exits;
 581         u32 mmio_exits;
 582         u32 signal_exits;
 583         u32 irq_window_exits;
 584         u32 nmi_window_exits;
 585         u32 halt_exits;
 586         u32 halt_wakeup;
 587         u32 request_irq_exits;
 588         u32 irq_exits;
 589         u32 host_state_reload;
 590         u32 efer_reload;
 591         u32 fpu_reload;
 592         u32 insn_emulation;
 593         u32 insn_emulation_fail;
 594         u32 hypercalls;
 595         u32 irq_injections;
 596         u32 nmi_injections;
 597 };
 598
 599 struct x86_instruction_info;
 600
 601 struct kvm_x86_ops {
 602         int (*cpu_has_kvm_support)(void);          /* __init */
 603         int (*disabled_by_bios)(void);             /* __init */
 604         int (*hardware_enable)(void *dummy);
 605         void (*hardware_disable)(void *dummy);
 606         void (*check_processor_compatibility)(void *rtn);
 607         int (*hardware_setup)(void);               /* __init */
 608         void (*hardware_unsetup)(void);            /* __exit */
 609         bool (*cpu_has_accelerated_tpr)(void);
 610         void (*cpuid_update)(struct kvm_vcpu *vcpu);
 611
 612         /* Create, but do not attach this VCPU */
 613         struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
 614         void (*vcpu_free)(struct kvm_vcpu *vcpu);
 615         int (*vcpu_reset)(struct kvm_vcpu *vcpu);
 616
 617         void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
 618         void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
 619         void (*vcpu_put)(struct kvm_vcpu *vcpu);
 620
 621         void (*set_guest_debug)(struct kvm_vcpu *vcpu,
 622                                 struct kvm_guest_debug *dbg);
 623         int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
 624         int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 625         u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
 626         void (*get_segment)(struct kvm_vcpu *vcpu,
 627                             struct kvm_segment *var, int seg);
 628         int (*get_cpl)(struct kvm_vcpu *vcpu);
 629         void (*set_segment)(struct kvm_vcpu *vcpu,
 630                             struct kvm_segment *var, int seg);
 631         void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
 632         void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu);
 633         void (*decache_cr3)(struct kvm_vcpu *vcpu);
 634         void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
 635         void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
 636         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 637         int (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
 638         void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
 639         void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
 640         void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
 641         void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
 642         void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
 643         void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value);
 644         void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
 645         unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
 646         void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
 647         void (*fpu_activate)(struct kvm_vcpu *vcpu);
 648         void (*fpu_deactivate)(struct kvm_vcpu *vcpu);
 649
 650         void (*tlb_flush)(struct kvm_vcpu *vcpu);
 651
 652         void (*run)(struct kvm_vcpu *vcpu);
 653         int (*handle_exit)(struct kvm_vcpu *vcpu);
 654         void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
 655         void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
 656         u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
 657         void (*patch_hypercall)(struct kvm_vcpu *vcpu,
 658                                 unsigned char *hypercall_addr);
 659         void (*set_irq)(struct kvm_vcpu *vcpu);
 660         void (*set_nmi)(struct kvm_vcpu *vcpu);
 661         void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
 662                                 bool has_error_code, u32 error_code,
 663                                 bool reinject);
 664         void (*cancel_injection)(struct kvm_vcpu *vcpu);
 665         int (*interrupt_allowed)(struct kvm_vcpu *vcpu);
 666         int (*nmi_allowed)(struct kvm_vcpu *vcpu);
 667         bool (*get_nmi_mask)(struct kvm_vcpu *vcpu);
 668         void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked);
 669         void (*enable_nmi_window)(struct kvm_vcpu *vcpu);
 670         void (*enable_irq_window)(struct kvm_vcpu *vcpu);
 671         void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr);
 672         int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
 673         int (*get_tdp_level)(void);
 674         u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio);
 675         int (*get_lpage_level)(void);
 676         bool (*rdtscp_supported)(void);
 677         bool (*invpcid_supported)(void);
 678         void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment, bool host);
 679
 680         void (*set_tdp_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 681
 682         void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry);
 683
 684         bool (*has_wbinvd_exit)(void);
 685
 686         void (*set_tsc_khz)(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale);
 687         void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset);
 688
 689         u64 (*compute_tsc_offset)(struct kvm_vcpu *vcpu, u64 target_tsc);
 690         u64 (*read_l1_tsc)(struct kvm_vcpu *vcpu);
 691
 692         void (*get_exit_info)(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2);
 693
 694         int (*check_intercept)(struct kvm_vcpu *vcpu,
 695                                struct x86_instruction_info *info,
 696                                enum x86_intercept_stage stage);
 697 };
 698
 699 struct kvm_arch_async_pf {
 700         u32 token;
 701         gfn_t gfn;
 702         unsigned long cr3;
 703         bool direct_map;
 704 };
 705
 706 extern struct kvm_x86_ops *kvm_x86_ops;
 707
 708 static inline void adjust_tsc_offset_guest(struct kvm_vcpu *vcpu,
 709                                            s64 adjustment)
 710 {
 711         kvm_x86_ops->adjust_tsc_offset(vcpu, adjustment, false);
 712 }
 713
 714 static inline void adjust_tsc_offset_host(struct kvm_vcpu *vcpu, s64 adjustment)
 715 {
 716         kvm_x86_ops->adjust_tsc_offset(vcpu, adjustment, true);
 717 }
 718
 719 int kvm_mmu_module_init(void);
 720 void kvm_mmu_module_exit(void);
 721
 722 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 723 int kvm_mmu_create(struct kvm_vcpu *vcpu);
 724 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 725 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
 726                 u64 dirty_mask, u64 nx_mask, u64 x_mask);
 727
 728 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 729 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
 730 void kvm_mmu_write_protect_pt_masked(struct kvm *kvm,
 731                                      struct kvm_memory_slot *slot,
 732                                      gfn_t gfn_offset, unsigned long mask);
 733 void kvm_mmu_zap_all(struct kvm *kvm);
 734 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
 735 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
 736
 737 int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3);
 738
 739 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
 740                           const void *val, int bytes);
 741 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn);
 742
 743 extern bool tdp_enabled;
 744
 745 u64 vcpu_tsc_khz(struct kvm_vcpu *vcpu);
 746
 747 /* control of guest tsc rate supported? */
 748 extern bool kvm_has_tsc_control;
 749 /* minimum supported tsc_khz for guests */
 750 extern u32  kvm_min_guest_tsc_khz;
 751 /* maximum supported tsc_khz for guests */
 752 extern u32  kvm_max_guest_tsc_khz;
 753
 754 enum emulation_result {
 755         EMULATE_DONE,       /* no further processing */
 756         EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
 757         EMULATE_FAIL,         /* can't emulate this instruction */
 758 };
 759
 760 #define EMULTYPE_NO_DECODE          (1 << 0)
 761 #define EMULTYPE_TRAP_UD            (1 << 1)
 762 #define EMULTYPE_SKIP               (1 << 2)
 763 #define EMULTYPE_RETRY              (1 << 3)
 764 int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2,
 765                             int emulation_type, void *insn, int insn_len);
 766
 767 static inline int emulate_instruction(struct kvm_vcpu *vcpu,
 768                         int emulation_type)
 769 {
 770         return x86_emulate_instruction(vcpu, 0, emulation_type, NULL, 0);
 771 }
 772
 773 void kvm_enable_efer_bits(u64);
 774 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
 775 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 776
 777 struct x86_emulate_ctxt;
 778
 779 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port);
 780 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
 781 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
 782 int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu);
 783
 784 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
 785 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg);
 786
 787 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index,
 788                     int reason, bool has_error_code, u32 error_code);
 789
 790 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 791 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
 792 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
 793 int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
 794 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val);
 795 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val);
 796 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
 797 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 798 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
 799 int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr);
 800
 801 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 802 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 803
 804 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu);
 805 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags);
 806 bool kvm_rdpmc(struct kvm_vcpu *vcpu);
 807
 808 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 809 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 810 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 811 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 812 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault);
 813 int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
 814                             gfn_t gfn, void *data, int offset, int len,
 815                             u32 access);
 816 void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault);
 817 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl);
 818
 819 int kvm_pic_set_irq(void *opaque, int irq, int level);
 820
 821 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
 822
 823 int fx_init(struct kvm_vcpu *vcpu);
 824
 825 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
 826 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 827                        const u8 *new, int bytes);
 828 int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn);
 829 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 830 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 831 int kvm_mmu_load(struct kvm_vcpu *vcpu);
 832 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
 833 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
 834 gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access);
 835 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva,
 836                               struct x86_exception *exception);
 837 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva,
 838                                struct x86_exception *exception);
 839 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva,
 840                                struct x86_exception *exception);
 841 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva,
 842                                 struct x86_exception *exception);
 843
 844 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
 845
 846 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code,
 847                        void *insn, int insn_len);
 848 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
 849
 850 void kvm_enable_tdp(void);
 851 void kvm_disable_tdp(void);
 852
 853 int complete_pio(struct kvm_vcpu *vcpu);
 854 bool kvm_check_iopl(struct kvm_vcpu *vcpu);
 855
 856 static inline gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access)
 857 {
 858         return gpa;
 859 }
 860
 861 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
 862 {
 863         struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
 864
 865         return (struct kvm_mmu_page *)page_private(page);
 866 }
 867
 868 static inline u16 kvm_read_ldt(void)
 869 {
 870         u16 ldt;
 871         asm("sldt %0" : "=g"(ldt));
 872         return ldt;
 873 }
 874
 875 static inline void kvm_load_ldt(u16 sel)
 876 {
 877         asm("lldt %0" : : "rm"(sel));
 878 }
 879
 880 #ifdef CONFIG_X86_64
 881 static inline unsigned long read_msr(unsigned long msr)
 882 {
 883         u64 value;
 884
 885         rdmsrl(msr, value);
 886         return value;
 887 }
 888 #endif
 889
 890 static inline u32 get_rdx_init_val(void)
 891 {
 892         return 0x600; /* P6 family */
 893 }
 894
 895 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
 896 {
 897         kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
 898 }
 899
 900 #define TSS_IOPB_BASE_OFFSET 0x66
 901 #define TSS_BASE_SIZE 0x68
 902 #define TSS_IOPB_SIZE (65536 / 8)
 903 #define TSS_REDIRECTION_SIZE (256 / 8)
 904 #define RMODE_TSS_SIZE                                                  \
 905         (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
 906
 907 enum {
 908         TASK_SWITCH_CALL = 0,
 909         TASK_SWITCH_IRET = 1,
 910         TASK_SWITCH_JMP = 2,
 911         TASK_SWITCH_GATE = 3,
 912 };
 913
 914 #define HF_GIF_MASK             (1 << 0)
 915 #define HF_HIF_MASK             (1 << 1)
 916 #define HF_VINTR_MASK           (1 << 2)
 917 #define HF_NMI_MASK             (1 << 3)
 918 #define HF_IRET_MASK            (1 << 4)
 919 #define HF_GUEST_MASK           (1 << 5) /* VCPU is in guest-mode */
 920
 921 /*
 922  * Hardware virtualization extension instructions may fault if a
 923  * reboot turns off virtualization while processes are running.
 924  * Trap the fault and ignore the instruction if that happens.
 925  */
 926 asmlinkage void kvm_spurious_fault(void);
 927 extern bool kvm_rebooting;
 928
 929 #define ____kvm_handle_fault_on_reboot(insn, cleanup_insn)      \
 930         "666: " insn "\n\t" \
 931         "668: \n\t"                           \
 932         ".pushsection .fixup, \"ax\" \n" \
 933         "667: \n\t" \
 934         cleanup_insn "\n\t"                   \
 935         "cmpb $0, kvm_rebooting \n\t"         \
 936         "jne 668b \n\t"                       \
 937         __ASM_SIZE(push) " $666b \n\t"        \
 938         "call kvm_spurious_fault \n\t"        \
 939         ".popsection \n\t" \
 940         _ASM_EXTABLE(666b, 667b)
 941
 942 #define __kvm_handle_fault_on_reboot(insn)              \
 943         ____kvm_handle_fault_on_reboot(insn, "")
 944
 945 #define KVM_ARCH_WANT_MMU_NOTIFIER
 946 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
 947 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
 948 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
 949 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
 950 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu);
 951 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu);
 952 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu);
 953 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
 954
 955 void kvm_define_shared_msr(unsigned index, u32 msr);
 956 void kvm_set_shared_msr(unsigned index, u64 val, u64 mask);
 957
 958 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip);
 959
 960 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
 961                                      struct kvm_async_pf *work);
 962 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
 963                                  struct kvm_async_pf *work);
 964 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
 965                                struct kvm_async_pf *work);
 966 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu);
 967 extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn);
 968
 969 void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err);
 970
 971 int kvm_is_in_guest(void);
 972
 973 void kvm_pmu_init(struct kvm_vcpu *vcpu);
 974 void kvm_pmu_destroy(struct kvm_vcpu *vcpu);
 975 void kvm_pmu_reset(struct kvm_vcpu *vcpu);
 976 void kvm_pmu_cpuid_update(struct kvm_vcpu *vcpu);
 977 bool kvm_pmu_msr(struct kvm_vcpu *vcpu, u32 msr);
 978 int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
 979 int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 980 int kvm_pmu_read_pmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data);
 981 void kvm_handle_pmu_event(struct kvm_vcpu *vcpu);
 982 void kvm_deliver_pmi(struct kvm_vcpu *vcpu);
 983
 984 #endif /* _ASM_X86_KVM_HOST_H */