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