LXR linux/arch/x86/include/asm/kvm

   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
  88extern spinlock_t kvm_lock;
  89extern struct list_head vm_list;
  90
  91struct kvm_vcpu;
  92struct kvm;
  93struct kvm_async_pf;
  94
  95enum 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
 118enum kvm_reg_ex {
 119        VCPU_EXREG_PDPTR = NR_VCPU_REGS,
 120        VCPU_EXREG_CR3,
 121};
 122
 123enum {
 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 */
 155struct kvm_mmu_memory_cache {
 156        int nobjs;
 157        void *objects[KVM_NR_MEM_OBJS];
 158};
 159
 160#define NR_PTE_CHAIN_ENTRIES 5
 161
 162struct 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 */
 177union 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
 192struct 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
 222struct kvm_pv_mmu_op_buffer {
 223        void *ptr;
 224        unsigned len;
 225        unsigned processed;
 226        char buf[512] __aligned(sizeof(long));
 227};
 228
 229struct 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 */
 241struct 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        hpa_t root_hpa;
 259        int root_level;
 260        int shadow_root_level;
 261        union kvm_mmu_page_role base_role;
 262        bool direct_map;
 263
 264        u64 *pae_root;
 265        u64 *lm_root;
 266        u64 rsvd_bits_mask[2][4];
 267
 268        bool nx;
 269
 270        u64 pdptrs[4]; /* pae */
 271};
 272
 273struct kvm_vcpu_arch {
 274        /*
 275         * rip and regs accesses must go through
 276         * kvm_{register,rip}_{read,write} functions.
 277         */
 278        unsigned long regs[NR_VCPU_REGS];
 279        u32 regs_avail;
 280        u32 regs_dirty;
 281
 282        unsigned long cr0;
 283        unsigned long cr0_guest_owned_bits;
 284        unsigned long cr2;
 285        unsigned long cr3;
 286        unsigned long cr4;
 287        unsigned long cr4_guest_owned_bits;
 288        unsigned long cr8;
 289        u32 hflags;
 290        u64 efer;
 291        u64 apic_base;
 292        struct kvm_lapic *apic;    /* kernel irqchip context */
 293        int32_t apic_arb_prio;
 294        int mp_state;
 295        int sipi_vector;
 296        u64 ia32_misc_enable_msr;
 297        bool tpr_access_reporting;
 298
 299        /*
 300         * Paging state of the vcpu
 301         *
 302         * If the vcpu runs in guest mode with two level paging this still saves
 303         * the paging mode of the l1 guest. This context is always used to
 304         * handle faults.
 305         */
 306        struct kvm_mmu mmu;
 307
 308        /*
 309         * Paging state of an L2 guest (used for nested npt)
 310         *
 311         * This context will save all necessary information to walk page tables
 312         * of the an L2 guest. This context is only initialized for page table
 313         * walking and not for faulting since we never handle l2 page faults on
 314         * the host.
 315         */
 316        struct kvm_mmu nested_mmu;
 317
 318        /*
 319         * Pointer to the mmu context currently used for
 320         * gva_to_gpa translations.
 321         */
 322        struct kvm_mmu *walk_mmu;
 323
 324        /* only needed in kvm_pv_mmu_op() path, but it's hot so
 325         * put it here to avoid allocation */
 326        struct kvm_pv_mmu_op_buffer mmu_op_buffer;
 327
 328        struct kvm_mmu_memory_cache mmu_pte_chain_cache;
 329        struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
 330        struct kvm_mmu_memory_cache mmu_page_cache;
 331        struct kvm_mmu_memory_cache mmu_page_header_cache;
 332
 333        gfn_t last_pt_write_gfn;
 334        int   last_pt_write_count;
 335        u64  *last_pte_updated;
 336        gfn_t last_pte_gfn;
 337
 338        struct {
 339                gfn_t gfn;      /* presumed gfn during guest pte update */
 340                pfn_t pfn;      /* pfn corresponding to that gfn */
 341                unsigned long mmu_seq;
 342        } update_pte;
 343
 344        struct fpu guest_fpu;
 345        u64 xcr0;
 346
 347        gva_t mmio_fault_cr2;
 348        struct kvm_pio_request pio;
 349        void *pio_data;
 350
 351        u8 event_exit_inst_len;
 352
 353        struct kvm_queued_exception {
 354                bool pending;
 355                bool has_error_code;
 356                bool reinject;
 357                u8 nr;
 358                u32 error_code;
 359        } exception;
 360
 361        struct kvm_queued_interrupt {
 362                bool pending;
 363                bool soft;
 364                u8 nr;
 365        } interrupt;
 366
 367        int halt_request; /* real mode on Intel only */
 368
 369        int cpuid_nent;
 370        struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
 371        /* emulate context */
 372
 373        struct x86_emulate_ctxt emulate_ctxt;
 374
 375        gpa_t time;
 376        struct pvclock_vcpu_time_info hv_clock;
 377        unsigned int hw_tsc_khz;
 378        unsigned int time_offset;
 379        struct page *time_page;
 380        u64 last_host_tsc;
 381        u64 last_guest_tsc;
 382        u64 last_kernel_ns;
 383        u64 last_tsc_nsec;
 384        u64 last_tsc_write;
 385        bool tsc_catchup;
 386
 387        bool nmi_pending;
 388        bool nmi_injected;
 389
 390        struct mtrr_state_type mtrr_state;
 391        u32 pat;
 392
 393        int switch_db_regs;
 394        unsigned long db[KVM_NR_DB_REGS];
 395        unsigned long dr6;
 396        unsigned long dr7;
 397        unsigned long eff_db[KVM_NR_DB_REGS];
 398
 399        u64 mcg_cap;
 400        u64 mcg_status;
 401        u64 mcg_ctl;
 402        u64 *mce_banks;
 403
 404        /* used for guest single stepping over the given code position */
 405        unsigned long singlestep_rip;
 406
 407        /* fields used by HYPER-V emulation */
 408        u64 hv_vapic;
 409
 410        cpumask_var_t wbinvd_dirty_mask;
 411
 412        struct {
 413                bool halted;
 414                gfn_t gfns[roundup_pow_of_two(ASYNC_PF_PER_VCPU)];
 415                struct gfn_to_hva_cache data;
 416                u64 msr_val;
 417                u32 id;
 418                bool send_user_only;
 419        } apf;
 420};
 421
 422struct kvm_arch {
 423        unsigned int n_used_mmu_pages;
 424        unsigned int n_requested_mmu_pages;
 425        unsigned int n_max_mmu_pages;
 426        atomic_t invlpg_counter;
 427        struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 428        /*
 429         * Hash table of struct kvm_mmu_page.
 430         */
 431        struct list_head active_mmu_pages;
 432        struct list_head assigned_dev_head;
 433        struct iommu_domain *iommu_domain;
 434        int iommu_flags;
 435        struct kvm_pic *vpic;
 436        struct kvm_ioapic *vioapic;
 437        struct kvm_pit *vpit;
 438        int vapics_in_nmi_mode;
 439
 440        unsigned int tss_addr;
 441        struct page *apic_access_page;
 442
 443        gpa_t wall_clock;
 444
 445        struct page *ept_identity_pagetable;
 446        bool ept_identity_pagetable_done;
 447        gpa_t ept_identity_map_addr;
 448
 449        unsigned long irq_sources_bitmap;
 450        s64 kvmclock_offset;
 451        spinlock_t tsc_write_lock;
 452        u64 last_tsc_nsec;
 453        u64 last_tsc_offset;
 454        u64 last_tsc_write;
 455        u32 virtual_tsc_khz;
 456        u32 virtual_tsc_mult;
 457        s8 virtual_tsc_shift;
 458
 459        struct kvm_xen_hvm_config xen_hvm_config;
 460
 461        /* fields used by HYPER-V emulation */
 462        u64 hv_guest_os_id;
 463        u64 hv_hypercall;
 464
 465        #ifdef CONFIG_KVM_MMU_AUDIT
 466        int audit_point;
 467        #endif
 468};
 469
 470struct kvm_vm_stat {
 471        u32 mmu_shadow_zapped;
 472        u32 mmu_pte_write;
 473        u32 mmu_pte_updated;
 474        u32 mmu_pde_zapped;
 475        u32 mmu_flooded;
 476        u32 mmu_recycled;
 477        u32 mmu_cache_miss;
 478        u32 mmu_unsync;
 479        u32 remote_tlb_flush;
 480        u32 lpages;
 481};
 482
 483struct kvm_vcpu_stat {
 484        u32 pf_fixed;
 485        u32 pf_guest;
 486        u32 tlb_flush;
 487        u32 invlpg;
 488
 489        u32 exits;
 490        u32 io_exits;
 491        u32 mmio_exits;
 492        u32 signal_exits;
 493        u32 irq_window_exits;
 494        u32 nmi_window_exits;
 495        u32 halt_exits;
 496        u32 halt_wakeup;
 497        u32 request_irq_exits;
 498        u32 irq_exits;
 499        u32 host_state_reload;
 500        u32 efer_reload;
 501        u32 fpu_reload;
 502        u32 insn_emulation;
 503        u32 insn_emulation_fail;
 504        u32 hypercalls;
 505        u32 irq_injections;
 506        u32 nmi_injections;
 507};
 508
 509struct kvm_x86_ops {
 510        int (*cpu_has_kvm_support)(void);          /* __init */
 511        int (*disabled_by_bios)(void);             /* __init */
 512        int (*hardware_enable)(void *dummy);
 513        void (*hardware_disable)(void *dummy);
 514        void (*check_processor_compatibility)(void *rtn);
 515        int (*hardware_setup)(void);               /* __init */
 516        void (*hardware_unsetup)(void);            /* __exit */
 517        bool (*cpu_has_accelerated_tpr)(void);
 518        void (*cpuid_update)(struct kvm_vcpu *vcpu);
 519
 520        /* Create, but do not attach this VCPU */
 521        struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
 522        void (*vcpu_free)(struct kvm_vcpu *vcpu);
 523        int (*vcpu_reset)(struct kvm_vcpu *vcpu);
 524
 525        void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
 526        void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
 527        void (*vcpu_put)(struct kvm_vcpu *vcpu);
 528
 529        void (*set_guest_debug)(struct kvm_vcpu *vcpu,
 530                                struct kvm_guest_debug *dbg);
 531        int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
 532        int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 533        u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
 534        void (*get_segment)(struct kvm_vcpu *vcpu,
 535                            struct kvm_segment *var, int seg);
 536        int (*get_cpl)(struct kvm_vcpu *vcpu);
 537        void (*set_segment)(struct kvm_vcpu *vcpu,
 538                            struct kvm_segment *var, int seg);
 539        void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
 540        void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu);
 541        void (*decache_cr3)(struct kvm_vcpu *vcpu);
 542        void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
 543        void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
 544        void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 545        void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
 546        void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
 547        void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
 548        void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
 549        void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
 550        void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
 551        void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value);
 552        void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
 553        unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
 554        void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
 555        void (*fpu_activate)(struct kvm_vcpu *vcpu);
 556        void (*fpu_deactivate)(struct kvm_vcpu *vcpu);
 557
 558        void (*tlb_flush)(struct kvm_vcpu *vcpu);
 559
 560        void (*run)(struct kvm_vcpu *vcpu);
 561        int (*handle_exit)(struct kvm_vcpu *vcpu);
 562        void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
 563        void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
 564        u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
 565        void (*patch_hypercall)(struct kvm_vcpu *vcpu,
 566                                unsigned char *hypercall_addr);
 567        void (*set_irq)(struct kvm_vcpu *vcpu);
 568        void (*set_nmi)(struct kvm_vcpu *vcpu);
 569        void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
 570                                bool has_error_code, u32 error_code,
 571                                bool reinject);
 572        void (*cancel_injection)(struct kvm_vcpu *vcpu);
 573        int (*interrupt_allowed)(struct kvm_vcpu *vcpu);
 574        int (*nmi_allowed)(struct kvm_vcpu *vcpu);
 575        bool (*get_nmi_mask)(struct kvm_vcpu *vcpu);
 576        void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked);
 577        void (*enable_nmi_window)(struct kvm_vcpu *vcpu);
 578        void (*enable_irq_window)(struct kvm_vcpu *vcpu);
 579        void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr);
 580        int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
 581        int (*get_tdp_level)(void);
 582        u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio);
 583        int (*get_lpage_level)(void);
 584        bool (*rdtscp_supported)(void);
 585        void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment);
 586
 587        void (*set_tdp_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 588
 589        void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry);
 590
 591        bool (*has_wbinvd_exit)(void);
 592
 593        void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset);
 594
 595        void (*get_exit_info)(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2);
 596        const struct trace_print_flags *exit_reasons_str;
 597};
 598
 599struct kvm_arch_async_pf {
 600        u32 token;
 601        gfn_t gfn;
 602        unsigned long cr3;
 603        bool direct_map;
 604};
 605
 606extern struct kvm_x86_ops *kvm_x86_ops;
 607
 608int kvm_mmu_module_init(void);
 609void kvm_mmu_module_exit(void);
 610
 611void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 612int kvm_mmu_create(struct kvm_vcpu *vcpu);
 613int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 614void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
 615void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
 616                u64 dirty_mask, u64 nx_mask, u64 x_mask);
 617
 618int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 619void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
 620void kvm_mmu_zap_all(struct kvm *kvm);
 621unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
 622void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
 623
 624int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3);
 625
 626int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
 627                          const void *val, int bytes);
 628int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
 629                  gpa_t addr, unsigned long *ret);
 630u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn);
 631
 632extern bool tdp_enabled;
 633
 634enum emulation_result {
 635        EMULATE_DONE,       /* no further processing */
 636        EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
 637        EMULATE_FAIL,         /* can't emulate this instruction */
 638};
 639
 640#define EMULTYPE_NO_DECODE          (1 << 0)
 641#define EMULTYPE_TRAP_UD            (1 << 1)
 642#define EMULTYPE_SKIP               (1 << 2)
 643int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2,
 644                            int emulation_type, void *insn, int insn_len);
 645
 646static inline int emulate_instruction(struct kvm_vcpu *vcpu,
 647                        int emulation_type)
 648{
 649        return x86_emulate_instruction(vcpu, 0, emulation_type, NULL, 0);
 650}
 651
 652void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 653void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 654
 655void kvm_enable_efer_bits(u64);
 656int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
 657int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 658
 659struct x86_emulate_ctxt;
 660
 661int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port);
 662void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
 663int kvm_emulate_halt(struct kvm_vcpu *vcpu);
 664int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
 665int emulate_clts(struct kvm_vcpu *vcpu);
 666int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu);
 667
 668void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
 669int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg);
 670
 671int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason,
 672                    bool has_error_code, u32 error_code);
 673
 674int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 675int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
 676int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
 677int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
 678int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val);
 679int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val);
 680unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
 681void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 682void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
 683int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr);
 684
 685int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 686int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 687
 688unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu);
 689void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags);
 690
 691void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 692void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 693void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 694void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 695void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault);
 696int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
 697                            gfn_t gfn, void *data, int offset, int len,
 698                            u32 access);
 699void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault);
 700bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl);
 701
 702int kvm_pic_set_irq(void *opaque, int irq, int level);
 703
 704void kvm_inject_nmi(struct kvm_vcpu *vcpu);
 705
 706int fx_init(struct kvm_vcpu *vcpu);
 707
 708void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
 709void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 710                       const u8 *new, int bytes,
 711                       bool guest_initiated);
 712int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 713void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 714int kvm_mmu_load(struct kvm_vcpu *vcpu);
 715void kvm_mmu_unload(struct kvm_vcpu *vcpu);
 716void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
 717gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva,
 718                              struct x86_exception *exception);
 719gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva,
 720                               struct x86_exception *exception);
 721gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva,
 722                               struct x86_exception *exception);
 723gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva,
 724                                struct x86_exception *exception);
 725
 726int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
 727
 728int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
 729
 730int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code,
 731                       void *insn, int insn_len);
 732void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
 733
 734void kvm_enable_tdp(void);
 735void kvm_disable_tdp(void);
 736
 737int complete_pio(struct kvm_vcpu *vcpu);
 738bool kvm_check_iopl(struct kvm_vcpu *vcpu);
 739
 740static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
 741{
 742        struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
 743
 744        return (struct kvm_mmu_page *)page_private(page);
 745}
 746
 747static inline u16 kvm_read_ldt(void)
 748{
 749        u16 ldt;
 750        asm("sldt %0" : "=g"(ldt));
 751        return ldt;
 752}
 753
 754static inline void kvm_load_ldt(u16 sel)
 755{
 756        asm("lldt %0" : : "rm"(sel));
 757}
 758
 759#ifdef CONFIG_X86_64
 760static inline unsigned long read_msr(unsigned long msr)
 761{
 762        u64 value;
 763
 764        rdmsrl(msr, value);
 765        return value;
 766}
 767#endif
 768
 769static inline u32 get_rdx_init_val(void)
 770{
 771        return 0x600; /* P6 family */
 772}
 773
 774static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
 775{
 776        kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
 777}
 778
 779#define TSS_IOPB_BASE_OFFSET 0x66
 780#define TSS_BASE_SIZE 0x68
 781#define TSS_IOPB_SIZE (65536 / 8)
 782#define TSS_REDIRECTION_SIZE (256 / 8)
 783#define RMODE_TSS_SIZE                                                  \
 784        (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
 785
 786enum {
 787        TASK_SWITCH_CALL = 0,
 788        TASK_SWITCH_IRET = 1,
 789        TASK_SWITCH_JMP = 2,
 790        TASK_SWITCH_GATE = 3,
 791};
 792
 793#define HF_GIF_MASK             (1 << 0)
 794#define HF_HIF_MASK             (1 << 1)
 795#define HF_VINTR_MASK           (1 << 2)
 796#define HF_NMI_MASK             (1 << 3)
 797#define HF_IRET_MASK            (1 << 4)
 798#define HF_GUEST_MASK           (1 << 5) /* VCPU is in guest-mode */
 799
 800/*
 801 * Hardware virtualization extension instructions may fault if a
 802 * reboot turns off virtualization while processes are running.
 803 * Trap the fault and ignore the instruction if that happens.
 804 */
 805asmlinkage void kvm_spurious_fault(void);
 806extern bool kvm_rebooting;
 807
 808#define __kvm_handle_fault_on_reboot(insn) \
 809        "666: " insn "\n\t" \
 810        "668: \n\t"                           \
 811        ".pushsection .fixup, \"ax\" \n" \
 812        "667: \n\t" \
 813        "cmpb $0, kvm_rebooting \n\t"         \
 814        "jne 668b \n\t"                       \
 815        __ASM_SIZE(push) " $666b \n\t"        \
 816        "call kvm_spurious_fault \n\t"        \
 817        ".popsection \n\t" \
 818        ".pushsection __ex_table, \"a\" \n\t" \
 819        _ASM_PTR " 666b, 667b \n\t" \
 820        ".popsection"
 821
 822#define KVM_ARCH_WANT_MMU_NOTIFIER
 823int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
 824int kvm_age_hva(struct kvm *kvm, unsigned long hva);
 825int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
 826void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
 827int cpuid_maxphyaddr(struct kvm_vcpu *vcpu);
 828int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu);
 829int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu);
 830int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
 831
 832void kvm_define_shared_msr(unsigned index, u32 msr);
 833void kvm_set_shared_msr(unsigned index, u64 val, u64 mask);
 834
 835bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip);
 836
 837void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
 838                                     struct kvm_async_pf *work);
 839void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
 840                                 struct kvm_async_pf *work);
 841void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
 842                               struct kvm_async_pf *work);
 843bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu);
 844extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn);
 845
 846void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err);
 847
 848#endif /* _ASM_X86_KVM_HOST_H */
 849