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