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