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