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 64
  30 #define KVM_MEMORY_SLOTS 32
  31 /* memory slots that does not exposed to userspace */
  32 #define KVM_PRIVATE_MEM_SLOTS 4
  33
  34 #define KVM_PIO_PAGE_OFFSET 1
  35 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2
  36
  37 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
  38 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
  39 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS |    \
  40                                   0xFFFFFF0000000000ULL)
  41
  42 #define INVALID_PAGE (~(hpa_t)0)
  43 #define VALID_PAGE(x) ((x) != INVALID_PAGE)
  44
  45 #define UNMAPPED_GVA (~(gpa_t)0)
  46
  47 /* KVM Hugepage definitions for x86 */
  48 #define KVM_NR_PAGE_SIZES       3
  49 #define KVM_HPAGE_GFN_SHIFT(x)  (((x) - 1) * 9)
  50 #define KVM_HPAGE_SHIFT(x)      (PAGE_SHIFT + KVM_HPAGE_GFN_SHIFT(x))
  51 #define KVM_HPAGE_SIZE(x)       (1UL << KVM_HPAGE_SHIFT(x))
  52 #define KVM_HPAGE_MASK(x)       (~(KVM_HPAGE_SIZE(x) - 1))
  53 #define KVM_PAGES_PER_HPAGE(x)  (KVM_HPAGE_SIZE(x) / PAGE_SIZE)
  54
  55 #define DE_VECTOR 0
  56 #define DB_VECTOR 1
  57 #define BP_VECTOR 3
  58 #define OF_VECTOR 4
  59 #define BR_VECTOR 5
  60 #define UD_VECTOR 6
  61 #define NM_VECTOR 7
  62 #define DF_VECTOR 8
  63 #define TS_VECTOR 10
  64 #define NP_VECTOR 11
  65 #define SS_VECTOR 12
  66 #define GP_VECTOR 13
  67 #define PF_VECTOR 14
  68 #define MF_VECTOR 16
  69 #define MC_VECTOR 18
  70
  71 #define SELECTOR_TI_MASK (1 << 2)
  72 #define SELECTOR_RPL_MASK 0x03
  73
  74 #define IOPL_SHIFT 12
  75
  76 #define KVM_PERMILLE_MMU_PAGES 20
  77 #define KVM_MIN_ALLOC_MMU_PAGES 64
  78 #define KVM_MMU_HASH_SHIFT 10
  79 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
  80 #define KVM_MIN_FREE_MMU_PAGES 5
  81 #define KVM_REFILL_PAGES 25
  82 #define KVM_MAX_CPUID_ENTRIES 80
  83 #define KVM_NR_FIXED_MTRR_REGION 88
  84 #define KVM_NR_VAR_MTRR 8
  85
  86 #define ASYNC_PF_PER_VCPU 64
  87
  88 extern raw_spinlock_t kvm_lock;
  89 extern struct list_head vm_list;
  90
  91 struct kvm_vcpu;
  92 struct kvm;
  93 struct kvm_async_pf;
  94
  95 enum kvm_reg {
  96         VCPU_REGS_RAX = 0,
  97         VCPU_REGS_RCX = 1,
  98         VCPU_REGS_RDX = 2,
  99         VCPU_REGS_RBX = 3,
 100         VCPU_REGS_RSP = 4,
 101         VCPU_REGS_RBP = 5,
 102         VCPU_REGS_RSI = 6,
 103         VCPU_REGS_RDI = 7,
 104 #ifdef CONFIG_X86_64
 105         VCPU_REGS_R8 = 8,
 106         VCPU_REGS_R9 = 9,
 107         VCPU_REGS_R10 = 10,
 108         VCPU_REGS_R11 = 11,
 109         VCPU_REGS_R12 = 12,
 110         VCPU_REGS_R13 = 13,
 111         VCPU_REGS_R14 = 14,
 112         VCPU_REGS_R15 = 15,
 113 #endif
 114         VCPU_REGS_RIP,
 115         NR_VCPU_REGS
 116 };
 117
 118 enum kvm_reg_ex {
 119         VCPU_EXREG_PDPTR = NR_VCPU_REGS,
 120         VCPU_EXREG_CR3,
 121 };
 122
 123 enum {
 124         VCPU_SREG_ES,
 125         VCPU_SREG_CS,
 126         VCPU_SREG_SS,
 127         VCPU_SREG_DS,
 128         VCPU_SREG_FS,
 129         VCPU_SREG_GS,
 130         VCPU_SREG_TR,
 131         VCPU_SREG_LDTR,
 132 };
 133
 134 #include <asm/kvm_emulate.h>
 135
 136 #define KVM_NR_MEM_OBJS 40
 137
 138 #define KVM_NR_DB_REGS  4
 139
 140 #define DR6_BD          (1 << 13)
 141 #define DR6_BS          (1 << 14)
 142 #define DR6_FIXED_1     0xffff0ff0
 143 #define DR6_VOLATILE    0x0000e00f
 144
 145 #define DR7_BP_EN_MASK  0x000000ff
 146 #define DR7_GE          (1 << 9)
 147 #define DR7_GD          (1 << 13)
 148 #define DR7_FIXED_1     0x00000400
 149 #define DR7_VOLATILE    0xffff23ff
 150
 151 /*
 152  * We don't want allocation failures within the mmu code, so we preallocate
 153  * enough memory for a single page fault in a cache.
 154  */
 155 struct kvm_mmu_memory_cache {
 156         int nobjs;
 157         void *objects[KVM_NR_MEM_OBJS];
 158 };
 159
 160 #define NR_PTE_CHAIN_ENTRIES 5
 161
 162 struct kvm_pte_chain {
 163         u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
 164         struct hlist_node link;
 165 };
 166
 167 /*
 168  * kvm_mmu_page_role, below, is defined as:
 169  *
 170  *   bits 0:3 - total guest paging levels (2-4, or zero for real mode)
 171  *   bits 4:7 - page table level for this shadow (1-4)
 172  *   bits 8:9 - page table quadrant for 2-level guests
 173  *   bit   16 - direct mapping of virtual to physical mapping at gfn
 174  *              used for real mode and two-dimensional paging
 175  *   bits 17:19 - common access permissions for all ptes in this shadow page
 176  */
 177 union kvm_mmu_page_role {
 178         unsigned word;
 179         struct {
 180                 unsigned level:4;
 181                 unsigned cr4_pae:1;
 182                 unsigned quadrant:2;
 183                 unsigned pad_for_nice_hex_output:6;
 184                 unsigned direct:1;
 185                 unsigned access:3;
 186                 unsigned invalid:1;
 187                 unsigned nxe:1;
 188                 unsigned cr0_wp:1;
 189         };
 190 };
 191
 192 struct kvm_mmu_page {
 193         struct list_head link;
 194         struct hlist_node hash_link;
 195
 196         /*
 197          * The following two entries are used to key the shadow page in the
 198          * hash table.
 199          */
 200         gfn_t gfn;
 201         union kvm_mmu_page_role role;
 202
 203         u64 *spt;
 204         /* hold the gfn of each spte inside spt */
 205         gfn_t *gfns;
 206         /*
 207          * One bit set per slot which has memory
 208          * in this shadow page.
 209          */
 210         DECLARE_BITMAP(slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS);
 211         bool multimapped;         /* More than one parent_pte? */
 212         bool unsync;
 213         int root_count;          /* Currently serving as active root */
 214         unsigned int unsync_children;
 215         union {
 216                 u64 *parent_pte;               /* !multimapped */
 217                 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
 218         };
 219         DECLARE_BITMAP(unsync_child_bitmap, 512);
 220 };
 221
 222 struct kvm_pv_mmu_op_buffer {
 223         void *ptr;
 224         unsigned len;
 225         unsigned processed;
 226         char buf[512] __aligned(sizeof(long));
 227 };
 228
 229 struct kvm_pio_request {
 230         unsigned long count;
 231         int in;
 232         int port;
 233         int size;
 234 };
 235
 236 /*
 237  * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 238  * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 239  * mode.
 240  */
 241 struct kvm_mmu {
 242         void (*new_cr3)(struct kvm_vcpu *vcpu);
 243         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root);
 244         unsigned long (*get_cr3)(struct kvm_vcpu *vcpu);
 245         int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err,
 246                           bool prefault);
 247         void (*inject_page_fault)(struct kvm_vcpu *vcpu,
 248                                   struct x86_exception *fault);
 249         void (*free)(struct kvm_vcpu *vcpu);
 250         gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access,
 251                             struct x86_exception *exception);
 252         gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access);
 253         void (*prefetch_page)(struct kvm_vcpu *vcpu,
 254                               struct kvm_mmu_page *page);
 255         int (*sync_page)(struct kvm_vcpu *vcpu,
 256                          struct kvm_mmu_page *sp);
 257         void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
 258         void (*update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
 259                         u64 *spte, const void *pte, unsigned long mmu_seq);
 260         hpa_t root_hpa;
 261         int root_level;
 262         int shadow_root_level;
 263         union kvm_mmu_page_role base_role;
 264         bool direct_map;
 265
 266         u64 *pae_root;
 267         u64 *lm_root;
 268         u64 rsvd_bits_mask[2][4];
 269
 270         bool nx;
 271
 272         u64 pdptrs[4]; /* pae */
 273 };
 274
 275 struct kvm_vcpu_arch {
 276         /*
 277          * rip and regs accesses must go through
 278          * kvm_{register,rip}_{read,write} functions.
 279          */
 280         unsigned long regs[NR_VCPU_REGS];
 281         u32 regs_avail;
 282         u32 regs_dirty;
 283
 284         unsigned long cr0;
 285         unsigned long cr0_guest_owned_bits;
 286         unsigned long cr2;
 287         unsigned long cr3;
 288         unsigned long cr4;
 289         unsigned long cr4_guest_owned_bits;
 290         unsigned long cr8;
 291         u32 hflags;
 292         u64 efer;
 293         u64 apic_base;
 294         struct kvm_lapic *apic;    /* kernel irqchip context */
 295         int32_t apic_arb_prio;
 296         int mp_state;
 297         int sipi_vector;
 298         u64 ia32_misc_enable_msr;
 299         bool tpr_access_reporting;
 300
 301         /*
 302          * Paging state of the vcpu
 303          *
 304          * If the vcpu runs in guest mode with two level paging this still saves
 305          * the paging mode of the l1 guest. This context is always used to
 306          * handle faults.
 307          */
 308         struct kvm_mmu mmu;
 309
 310         /*
 311          * Paging state of an L2 guest (used for nested npt)
 312          *
 313          * This context will save all necessary information to walk page tables
 314          * of the an L2 guest. This context is only initialized for page table
 315          * walking and not for faulting since we never handle l2 page faults on
 316          * the host.
 317          */
 318         struct kvm_mmu nested_mmu;
 319
 320         /*
 321          * Pointer to the mmu context currently used for
 322          * gva_to_gpa translations.
 323          */
 324         struct kvm_mmu *walk_mmu;
 325
 326         /* only needed in kvm_pv_mmu_op() path, but it's hot so
 327          * put it here to avoid allocation */
 328         struct kvm_pv_mmu_op_buffer mmu_op_buffer;
 329
 330         struct kvm_mmu_memory_cache mmu_pte_chain_cache;
 331         struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
 332         struct kvm_mmu_memory_cache mmu_page_cache;
 333         struct kvm_mmu_memory_cache mmu_page_header_cache;
 334
 335         gfn_t last_pt_write_gfn;
 336         int   last_pt_write_count;
 337         u64  *last_pte_updated;
 338         gfn_t last_pte_gfn;
 339
 340         struct fpu guest_fpu;
 341         u64 xcr0;
 342
 343         gva_t mmio_fault_cr2;
 344         struct kvm_pio_request pio;
 345         void *pio_data;
 346
 347         u8 event_exit_inst_len;
 348
 349         struct kvm_queued_exception {
 350                 bool pending;
 351                 bool has_error_code;
 352                 bool reinject;
 353                 u8 nr;
 354                 u32 error_code;
 355         } exception;
 356
 357         struct kvm_queued_interrupt {
 358                 bool pending;
 359                 bool soft;
 360                 u8 nr;
 361         } interrupt;
 362
 363         int halt_request; /* real mode on Intel only */
 364
 365         int cpuid_nent;
 366         struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
 367         /* emulate context */
 368
 369         struct x86_emulate_ctxt emulate_ctxt;
 370
 371         gpa_t time;
 372         struct pvclock_vcpu_time_info hv_clock;
 373         unsigned int hw_tsc_khz;
 374         unsigned int time_offset;
 375         struct page *time_page;
 376         u64 last_host_tsc;
 377         u64 last_guest_tsc;
 378         u64 last_kernel_ns;
 379         u64 last_tsc_nsec;
 380         u64 last_tsc_write;
 381         bool tsc_catchup;
 382
 383         bool nmi_pending;
 384         bool nmi_injected;
 385
 386         struct mtrr_state_type mtrr_state;
 387         u32 pat;
 388
 389         int switch_db_regs;
 390         unsigned long db[KVM_NR_DB_REGS];
 391         unsigned long dr6;
 392         unsigned long dr7;
 393         unsigned long eff_db[KVM_NR_DB_REGS];
 394
 395         u64 mcg_cap;
 396         u64 mcg_status;
 397         u64 mcg_ctl;
 398         u64 *mce_banks;
 399
 400         /* used for guest single stepping over the given code position */
 401         unsigned long singlestep_rip;
 402
 403         /* fields used by HYPER-V emulation */
 404         u64 hv_vapic;
 405
 406         cpumask_var_t wbinvd_dirty_mask;
 407
 408         struct {
 409                 bool halted;
 410                 gfn_t gfns[roundup_pow_of_two(ASYNC_PF_PER_VCPU)];
 411                 struct gfn_to_hva_cache data;
 412                 u64 msr_val;
 413                 u32 id;
 414                 bool send_user_only;
 415         } apf;
 416 };
 417
 418 struct kvm_arch {
 419         unsigned int n_used_mmu_pages;
 420         unsigned int n_requested_mmu_pages;
 421         unsigned int n_max_mmu_pages;
 422         atomic_t invlpg_counter;
 423         struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 424         /*
 425          * Hash table of struct kvm_mmu_page.
 426          */
 427         struct list_head active_mmu_pages;
 428         struct list_head assigned_dev_head;
 429         struct iommu_domain *iommu_domain;
 430         int iommu_flags;
 431         struct kvm_pic *vpic;
 432         struct kvm_ioapic *vioapic;
 433         struct kvm_pit *vpit;
 434         int vapics_in_nmi_mode;
 435
 436         unsigned int tss_addr;
 437         struct page *apic_access_page;
 438
 439         gpa_t wall_clock;
 440
 441         struct page *ept_identity_pagetable;
 442         bool ept_identity_pagetable_done;
 443         gpa_t ept_identity_map_addr;
 444
 445         unsigned long irq_sources_bitmap;
 446         s64 kvmclock_offset;
 447         raw_spinlock_t tsc_write_lock;
 448         u64 last_tsc_nsec;
 449         u64 last_tsc_offset;
 450         u64 last_tsc_write;
 451         u32 virtual_tsc_khz;
 452         u32 virtual_tsc_mult;
 453         s8 virtual_tsc_shift;
 454
 455         struct kvm_xen_hvm_config xen_hvm_config;
 456
 457         /* fields used by HYPER-V emulation */
 458         u64 hv_guest_os_id;
 459         u64 hv_hypercall;
 460
 461         #ifdef CONFIG_KVM_MMU_AUDIT
 462         int audit_point;
 463         #endif
 464 };
 465
 466 struct kvm_vm_stat {
 467         u32 mmu_shadow_zapped;
 468         u32 mmu_pte_write;
 469         u32 mmu_pte_updated;
 470         u32 mmu_pde_zapped;
 471         u32 mmu_flooded;
 472         u32 mmu_recycled;
 473         u32 mmu_cache_miss;
 474         u32 mmu_unsync;
 475         u32 remote_tlb_flush;
 476         u32 lpages;
 477 };
 478
 479 struct kvm_vcpu_stat {
 480         u32 pf_fixed;
 481         u32 pf_guest;
 482         u32 tlb_flush;
 483         u32 invlpg;
 484
 485         u32 exits;
 486         u32 io_exits;
 487         u32 mmio_exits;
 488         u32 signal_exits;
 489         u32 irq_window_exits;
 490         u32 nmi_window_exits;
 491         u32 halt_exits;
 492         u32 halt_wakeup;
 493         u32 request_irq_exits;
 494         u32 irq_exits;
 495         u32 host_state_reload;
 496         u32 efer_reload;
 497         u32 fpu_reload;
 498         u32 insn_emulation;
 499         u32 insn_emulation_fail;
 500         u32 hypercalls;
 501         u32 irq_injections;
 502         u32 nmi_injections;
 503 };
 504
 505 struct kvm_x86_ops {
 506         int (*cpu_has_kvm_support)(void);          /* __init */
 507         int (*disabled_by_bios)(void);             /* __init */
 508         int (*hardware_enable)(void *dummy);
 509         void (*hardware_disable)(void *dummy);
 510         void (*check_processor_compatibility)(void *rtn);
 511         int (*hardware_setup)(void);               /* __init */
 512         void (*hardware_unsetup)(void);            /* __exit */
 513         bool (*cpu_has_accelerated_tpr)(void);
 514         void (*cpuid_update)(struct kvm_vcpu *vcpu);
 515
 516         /* Create, but do not attach this VCPU */
 517         struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
 518         void (*vcpu_free)(struct kvm_vcpu *vcpu);
 519         int (*vcpu_reset)(struct kvm_vcpu *vcpu);
 520
 521         void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
 522         void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
 523         void (*vcpu_put)(struct kvm_vcpu *vcpu);
 524
 525         void (*set_guest_debug)(struct kvm_vcpu *vcpu,
 526                                 struct kvm_guest_debug *dbg);
 527         int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
 528         int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 529         u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
 530         void (*get_segment)(struct kvm_vcpu *vcpu,
 531                             struct kvm_segment *var, int seg);
 532         int (*get_cpl)(struct kvm_vcpu *vcpu);
 533         void (*set_segment)(struct kvm_vcpu *vcpu,
 534                             struct kvm_segment *var, int seg);
 535         void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
 536         void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu);
 537         void (*decache_cr3)(struct kvm_vcpu *vcpu);
 538         void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
 539         void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
 540         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 541         void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
 542         void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
 543         void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
 544         void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
 545         void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
 546         void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
 547         void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value);
 548         void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
 549         unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
 550         void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
 551         void (*fpu_activate)(struct kvm_vcpu *vcpu);
 552         void (*fpu_deactivate)(struct kvm_vcpu *vcpu);
 553
 554         void (*tlb_flush)(struct kvm_vcpu *vcpu);
 555
 556         void (*run)(struct kvm_vcpu *vcpu);
 557         int (*handle_exit)(struct kvm_vcpu *vcpu);
 558         void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
 559         void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
 560         u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
 561         void (*patch_hypercall)(struct kvm_vcpu *vcpu,
 562                                 unsigned char *hypercall_addr);
 563         void (*set_irq)(struct kvm_vcpu *vcpu);
 564         void (*set_nmi)(struct kvm_vcpu *vcpu);
 565         void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
 566                                 bool has_error_code, u32 error_code,
 567                                 bool reinject);
 568         void (*cancel_injection)(struct kvm_vcpu *vcpu);
 569         int (*interrupt_allowed)(struct kvm_vcpu *vcpu);
 570         int (*nmi_allowed)(struct kvm_vcpu *vcpu);
 571         bool (*get_nmi_mask)(struct kvm_vcpu *vcpu);
 572         void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked);
 573         void (*enable_nmi_window)(struct kvm_vcpu *vcpu);
 574         void (*enable_irq_window)(struct kvm_vcpu *vcpu);
 575         void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr);
 576         int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
 577         int (*get_tdp_level)(void);
 578         u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio);
 579         int (*get_lpage_level)(void);
 580         bool (*rdtscp_supported)(void);
 581         void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment);
 582
 583         void (*set_tdp_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 584
 585         void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry);
 586
 587         bool (*has_wbinvd_exit)(void);
 588
 589         void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset);
 590
 591         void (*get_exit_info)(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2);
 592         const struct trace_print_flags *exit_reasons_str;
 593 };
 594
 595 struct kvm_arch_async_pf {
 596         u32 token;
 597         gfn_t gfn;
 598         unsigned long cr3;
 599         bool direct_map;
 600 };
 601
 602 extern struct kvm_x86_ops *kvm_x86_ops;
 603
 604 int kvm_mmu_module_init(void);
 605 void kvm_mmu_module_exit(void);
 606
 607 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 608 int kvm_mmu_create(struct kvm_vcpu *vcpu);
 609 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 610 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
 611 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
 612                 u64 dirty_mask, u64 nx_mask, u64 x_mask);
 613
 614 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 615 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
 616 void kvm_mmu_zap_all(struct kvm *kvm);
 617 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
 618 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
 619
 620 int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3);
 621
 622 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
 623                           const void *val, int bytes);
 624 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
 625                   gpa_t addr, unsigned long *ret);
 626 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn);
 627
 628 extern bool tdp_enabled;
 629
 630 enum emulation_result {
 631         EMULATE_DONE,       /* no further processing */
 632         EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
 633         EMULATE_FAIL,         /* can't emulate this instruction */
 634 };
 635
 636 #define EMULTYPE_NO_DECODE          (1 << 0)
 637 #define EMULTYPE_TRAP_UD            (1 << 1)
 638 #define EMULTYPE_SKIP               (1 << 2)
 639 int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2,
 640                             int emulation_type, void *insn, int insn_len);
 641
 642 static inline int emulate_instruction(struct kvm_vcpu *vcpu,
 643                         int emulation_type)
 644 {
 645         return x86_emulate_instruction(vcpu, 0, emulation_type, NULL, 0);
 646 }
 647
 648 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 649 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 650
 651 void kvm_enable_efer_bits(u64);
 652 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
 653 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 654
 655 struct x86_emulate_ctxt;
 656
 657 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port);
 658 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
 659 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
 660 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
 661 int emulate_clts(struct kvm_vcpu *vcpu);
 662 int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu);
 663
 664 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
 665 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg);
 666
 667 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason,
 668                     bool has_error_code, u32 error_code);
 669
 670 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 671 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
 672 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
 673 int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
 674 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val);
 675 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val);
 676 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
 677 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 678 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
 679 int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr);
 680
 681 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 682 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 683
 684 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu);
 685 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags);
 686
 687 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 688 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 689 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 690 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 691 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault);
 692 int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
 693                             gfn_t gfn, void *data, int offset, int len,
 694                             u32 access);
 695 void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault);
 696 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl);
 697
 698 int kvm_pic_set_irq(void *opaque, int irq, int level);
 699
 700 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
 701
 702 int fx_init(struct kvm_vcpu *vcpu);
 703
 704 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
 705 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 706                        const u8 *new, int bytes,
 707                        bool guest_initiated);
 708 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 709 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 710 int kvm_mmu_load(struct kvm_vcpu *vcpu);
 711 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
 712 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
 713 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva,
 714                               struct x86_exception *exception);
 715 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva,
 716                                struct x86_exception *exception);
 717 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva,
 718                                struct x86_exception *exception);
 719 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva,
 720                                 struct x86_exception *exception);
 721
 722 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
 723
 724 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
 725
 726 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code,
 727                        void *insn, int insn_len);
 728 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
 729
 730 void kvm_enable_tdp(void);
 731 void kvm_disable_tdp(void);
 732
 733 int complete_pio(struct kvm_vcpu *vcpu);
 734 bool kvm_check_iopl(struct kvm_vcpu *vcpu);
 735
 736 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
 737 {
 738         struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
 739
 740         return (struct kvm_mmu_page *)page_private(page);
 741 }
 742
 743 static inline u16 kvm_read_ldt(void)
 744 {
 745         u16 ldt;
 746         asm("sldt %0" : "=g"(ldt));
 747         return ldt;
 748 }
 749
 750 static inline void kvm_load_ldt(u16 sel)
 751 {
 752         asm("lldt %0" : : "rm"(sel));
 753 }
 754
 755 #ifdef CONFIG_X86_64
 756 static inline unsigned long read_msr(unsigned long msr)
 757 {
 758         u64 value;
 759
 760         rdmsrl(msr, value);
 761         return value;
 762 }
 763 #endif
 764
 765 static inline u32 get_rdx_init_val(void)
 766 {
 767         return 0x600; /* P6 family */
 768 }
 769
 770 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
 771 {
 772         kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
 773 }
 774
 775 #define TSS_IOPB_BASE_OFFSET 0x66
 776 #define TSS_BASE_SIZE 0x68
 777 #define TSS_IOPB_SIZE (65536 / 8)
 778 #define TSS_REDIRECTION_SIZE (256 / 8)
 779 #define RMODE_TSS_SIZE                                                  \
 780         (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
 781
 782 enum {
 783         TASK_SWITCH_CALL = 0,
 784         TASK_SWITCH_IRET = 1,
 785         TASK_SWITCH_JMP = 2,
 786         TASK_SWITCH_GATE = 3,
 787 };
 788
 789 #define HF_GIF_MASK             (1 << 0)
 790 #define HF_HIF_MASK             (1 << 1)
 791 #define HF_VINTR_MASK           (1 << 2)
 792 #define HF_NMI_MASK             (1 << 3)
 793 #define HF_IRET_MASK            (1 << 4)
 794 #define HF_GUEST_MASK           (1 << 5) /* VCPU is in guest-mode */
 795
 796 /*
 797  * Hardware virtualization extension instructions may fault if a
 798  * reboot turns off virtualization while processes are running.
 799  * Trap the fault and ignore the instruction if that happens.
 800  */
 801 asmlinkage void kvm_spurious_fault(void);
 802 extern bool kvm_rebooting;
 803
 804 #define __kvm_handle_fault_on_reboot(insn) \
 805         "666: " insn "\n\t" \
 806         "668: \n\t"                           \
 807         ".pushsection .fixup, \"ax\" \n" \
 808         "667: \n\t" \
 809         "cmpb $0, kvm_rebooting \n\t"         \
 810         "jne 668b \n\t"                       \
 811         __ASM_SIZE(push) " $666b \n\t"        \
 812         "call kvm_spurious_fault \n\t"        \
 813         ".popsection \n\t" \
 814         ".pushsection __ex_table, \"a\" \n\t" \
 815         _ASM_PTR " 666b, 667b \n\t" \
 816         ".popsection"
 817
 818 #define KVM_ARCH_WANT_MMU_NOTIFIER
 819 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
 820 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
 821 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
 822 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
 823 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu);
 824 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu);
 825 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu);
 826 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
 827
 828 void kvm_define_shared_msr(unsigned index, u32 msr);
 829 void kvm_set_shared_msr(unsigned index, u64 val, u64 mask);
 830
 831 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip);
 832
 833 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
 834                                      struct kvm_async_pf *work);
 835 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
 836                                  struct kvm_async_pf *work);
 837 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
 838                                struct kvm_async_pf *work);
 839 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu);
 840 extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn);
 841
 842 void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err);
 843
 844 #endif /* _ASM_X86_KVM_HOST_H */