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         VCPU_EXREG_CR3,
 121 };
 122
 123 enum {
 124         VCPU_SREG_ES,
 125         VCPU_SREG_CS,
 126         VCPU_SREG_SS,
 127         VCPU_SREG_DS,
 128         VCPU_SREG_FS,
 129         VCPU_SREG_GS,
 130         VCPU_SREG_TR,
 131         VCPU_SREG_LDTR,
 132 };
 133
 134 #include <asm/kvm_emulate.h>
 135
 136 #define KVM_NR_MEM_OBJS 40
 137
 138 #define KVM_NR_DB_REGS  4
 139
 140 #define DR6_BD          (1 << 13)
 141 #define DR6_BS          (1 << 14)
 142 #define DR6_FIXED_1     0xffff0ff0
 143 #define DR6_VOLATILE    0x0000e00f
 144
 145 #define DR7_BP_EN_MASK  0x000000ff
 146 #define DR7_GE          (1 << 9)
 147 #define DR7_GD          (1 << 13)
 148 #define DR7_FIXED_1     0x00000400
 149 #define DR7_VOLATILE    0xffff23ff
 150
 151 /*
 152  * We don't want allocation failures within the mmu code, so we preallocate
 153  * enough memory for a single page fault in a cache.
 154  */
 155 struct kvm_mmu_memory_cache {
 156         int nobjs;
 157         void *objects[KVM_NR_MEM_OBJS];
 158 };
 159
 160 #define NR_PTE_CHAIN_ENTRIES 5
 161
 162 struct kvm_pte_chain {
 163         u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
 164         struct hlist_node link;
 165 };
 166
 167 /*
 168  * kvm_mmu_page_role, below, is defined as:
 169  *
 170  *   bits 0:3 - total guest paging levels (2-4, or zero for real mode)
 171  *   bits 4:7 - page table level for this shadow (1-4)
 172  *   bits 8:9 - page table quadrant for 2-level guests
 173  *   bit   16 - direct mapping of virtual to physical mapping at gfn
 174  *              used for real mode and two-dimensional paging
 175  *   bits 17:19 - common access permissions for all ptes in this shadow page
 176  */
 177 union kvm_mmu_page_role {
 178         unsigned word;
 179         struct {
 180                 unsigned level:4;
 181                 unsigned cr4_pae:1;
 182                 unsigned quadrant:2;
 183                 unsigned pad_for_nice_hex_output:6;
 184                 unsigned direct:1;
 185                 unsigned access:3;
 186                 unsigned invalid:1;
 187                 unsigned nxe:1;
 188                 unsigned cr0_wp:1;
 189         };
 190 };
 191
 192 struct kvm_mmu_page {
 193         struct list_head link;
 194         struct hlist_node hash_link;
 195
 196         /*
 197          * The following two entries are used to key the shadow page in the
 198          * hash table.
 199          */
 200         gfn_t gfn;
 201         union kvm_mmu_page_role role;
 202
 203         u64 *spt;
 204         /* hold the gfn of each spte inside spt */
 205         gfn_t *gfns;
 206         /*
 207          * One bit set per slot which has memory
 208          * in this shadow page.
 209          */
 210         DECLARE_BITMAP(slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS);
 211         bool multimapped;         /* More than one parent_pte? */
 212         bool unsync;
 213         int root_count;          /* Currently serving as active root */
 214         unsigned int unsync_children;
 215         union {
 216                 u64 *parent_pte;               /* !multimapped */
 217                 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
 218         };
 219         DECLARE_BITMAP(unsync_child_bitmap, 512);
 220 };
 221
 222 struct kvm_pv_mmu_op_buffer {
 223         void *ptr;
 224         unsigned len;
 225         unsigned processed;
 226         char buf[512] __aligned(sizeof(long));
 227 };
 228
 229 struct kvm_pio_request {
 230         unsigned long count;
 231         int in;
 232         int port;
 233         int size;
 234 };
 235
 236 /*
 237  * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 238  * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 239  * mode.
 240  */
 241 struct kvm_mmu {
 242         void (*new_cr3)(struct kvm_vcpu *vcpu);
 243         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root);
 244         unsigned long (*get_cr3)(struct kvm_vcpu *vcpu);
 245         int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err,
 246                           bool prefault);
 247         void (*inject_page_fault)(struct kvm_vcpu *vcpu,
 248                                   struct x86_exception *fault);
 249         void (*free)(struct kvm_vcpu *vcpu);
 250         gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access,
 251                             struct x86_exception *exception);
 252         gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access);
 253         void (*prefetch_page)(struct kvm_vcpu *vcpu,
 254                               struct kvm_mmu_page *page);
 255         int (*sync_page)(struct kvm_vcpu *vcpu,
 256                          struct kvm_mmu_page *sp);
 257         void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
 258         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
 273 struct 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
 422 struct 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
 470 struct 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
 483 struct 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
 509 struct 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
 599 struct kvm_arch_async_pf {
 600         u32 token;
 601         gfn_t gfn;
 602         unsigned long cr3;
 603         bool direct_map;
 604 };
 605
 606 extern struct kvm_x86_ops *kvm_x86_ops;
 607
 608 int kvm_mmu_module_init(void);
 609 void kvm_mmu_module_exit(void);
 610
 611 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 612 int kvm_mmu_create(struct kvm_vcpu *vcpu);
 613 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 614 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
 615 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
 616                 u64 dirty_mask, u64 nx_mask, u64 x_mask);
 617
 618 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 619 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
 620 void kvm_mmu_zap_all(struct kvm *kvm);
 621 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
 622 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
 623
 624 int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3);
 625
 626 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
 627                           const void *val, int bytes);
 628 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
 629                   gpa_t addr, unsigned long *ret);
 630 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn);
 631
 632 extern bool tdp_enabled;
 633
 634 enum 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)
 643 int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2,
 644                             int emulation_type, void *insn, int insn_len);
 645
 646 static 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
 652 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 653 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 654
 655 void kvm_enable_efer_bits(u64);
 656 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
 657 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 658
 659 struct x86_emulate_ctxt;
 660
 661 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port);
 662 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
 663 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
 664 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
 665 int emulate_clts(struct kvm_vcpu *vcpu);
 666 int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu);
 667
 668 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
 669 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg);
 670
 671 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason,
 672                     bool has_error_code, u32 error_code);
 673
 674 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 675 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
 676 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
 677 int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
 678 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val);
 679 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val);
 680 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
 681 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 682 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
 683 int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr);
 684
 685 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 686 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 687
 688 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu);
 689 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags);
 690
 691 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 692 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 693 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 694 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 695 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault);
 696 int 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);
 699 void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault);
 700 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl);
 701
 702 int kvm_pic_set_irq(void *opaque, int irq, int level);
 703
 704 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
 705
 706 int fx_init(struct kvm_vcpu *vcpu);
 707
 708 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
 709 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 710                        const u8 *new, int bytes,
 711                        bool guest_initiated);
 712 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 713 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 714 int kvm_mmu_load(struct kvm_vcpu *vcpu);
 715 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
 716 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
 717 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva,
 718                               struct x86_exception *exception);
 719 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva,
 720                                struct x86_exception *exception);
 721 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva,
 722                                struct x86_exception *exception);
 723 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva,
 724                                 struct x86_exception *exception);
 725
 726 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
 727
 728 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
 729
 730 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code,
 731                        void *insn, int insn_len);
 732 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
 733
 734 void kvm_enable_tdp(void);
 735 void kvm_disable_tdp(void);
 736
 737 int complete_pio(struct kvm_vcpu *vcpu);
 738 bool kvm_check_iopl(struct kvm_vcpu *vcpu);
 739
 740 static 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
 747 static inline u16 kvm_read_ldt(void)
 748 {
 749         u16 ldt;
 750         asm("sldt %0" : "=g"(ldt));
 751         return ldt;
 752 }
 753
 754 static inline void kvm_load_ldt(u16 sel)
 755 {
 756         asm("lldt %0" : : "rm"(sel));
 757 }
 758
 759 #ifdef CONFIG_X86_64
 760 static inline unsigned long read_msr(unsigned long msr)
 761 {
 762         u64 value;
 763
 764         rdmsrl(msr, value);
 765         return value;
 766 }
 767 #endif
 768
 769 static inline u32 get_rdx_init_val(void)
 770 {
 771         return 0x600; /* P6 family */
 772 }
 773
 774 static 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
 786 enum {
 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  */
 805 asmlinkage void kvm_spurious_fault(void);
 806 extern 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
 823 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
 824 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
 825 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
 826 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
 827 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu);
 828 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu);
 829 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu);
 830 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
 831
 832 void kvm_define_shared_msr(unsigned index, u32 msr);
 833 void kvm_set_shared_msr(unsigned index, u64 val, u64 mask);
 834
 835 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip);
 836
 837 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
 838                                      struct kvm_async_pf *work);
 839 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
 840                                  struct kvm_async_pf *work);
 841 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
 842                                struct kvm_async_pf *work);
 843 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu);
 844 extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn);
 845
 846 void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err);
 847
 848 #endif /* _ASM_X86_KVM_HOST_H */