kvm/kernel/arch/x86/include/asm/kvm_host.h

   1 #ifndef KVM_UNIFDEF_H
   2 #define KVM_UNIFDEF_H
   3
   4 #ifdef __i386__
   5 #ifndef CONFIG_X86_32
   6 #define CONFIG_X86_32 1
   7 #endif
   8 #endif
   9
  10 #ifdef __x86_64__
  11 #ifndef CONFIG_X86_64
  12 #define CONFIG_X86_64 1
  13 #endif
  14 #endif
  15
  16 #if defined(__i386__) || defined (__x86_64__)
  17 #ifndef CONFIG_X86
  18 #define CONFIG_X86 1
  19 #endif
  20 #endif
  21
  22 #ifdef __ia64__
  23 #ifndef CONFIG_IA64
  24 #define CONFIG_IA64 1
  25 #endif
  26 #endif
  27
  28 #ifdef __PPC__
  29 #ifndef CONFIG_PPC
  30 #define CONFIG_PPC 1
  31 #endif
  32 #endif
  33
  34 #ifdef __s390__
  35 #ifndef CONFIG_S390
  36 #define CONFIG_S390 1
  37 #endif
  38 #endif
  39
  40 #endif
  41 /*
  42  * Kernel-based Virtual Machine driver for Linux
  43  *
  44  * This header defines architecture specific interfaces, x86 version
  45  *
  46  * This work is licensed under the terms of the GNU GPL, version 2.  See
  47  * the COPYING file in the top-level directory.
  48  *
  49  */
  50
  51 #ifndef _ASM_X86_KVM_HOST_H
  52 #define _ASM_X86_KVM_HOST_H
  53
  54 #include <linux/types.h>
  55 #include <linux/mm.h>
  56 #include <linux/mmu_notifier.h>
  57
  58 #include <linux/kvm.h>
  59 #include <linux/kvm_para.h>
  60 #include <linux/kvm_types.h>
  61
  62 #include <asm/pvclock-abi.h>
  63 #include <asm/desc.h>
  64 #include <asm/mtrr.h>
  65 #include <asm/msr-index.h>
  66
  67 #define KVM_MAX_VCPUS 16
  68 #define KVM_MEMORY_SLOTS 32
  69 /* memory slots that does not exposed to userspace */
  70 #define KVM_PRIVATE_MEM_SLOTS 4
  71
  72 #define KVM_PIO_PAGE_OFFSET 1
  73 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2
  74
  75 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
  76 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
  77 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS |    \
  78                                   0xFFFFFF0000000000ULL)
  79
  80 #define KVM_GUEST_CR0_MASK                                 \
  81         (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
  82          | X86_CR0_NW | X86_CR0_CD)
  83 #define KVM_VM_CR0_ALWAYS_ON                                            \
  84         (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
  85          | X86_CR0_MP)
  86 #define KVM_GUEST_CR4_MASK                                              \
  87         (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
  88 #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
  89 #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
  90
  91 #define INVALID_PAGE (~(hpa_t)0)
  92 #define UNMAPPED_GVA (~(gpa_t)0)
  93
  94 /* shadow tables are PAE even on non-PAE hosts */
  95 #define KVM_HPAGE_SHIFT 21
  96 #define KVM_HPAGE_SIZE (1UL << KVM_HPAGE_SHIFT)
  97 #define KVM_HPAGE_MASK (~(KVM_HPAGE_SIZE - 1))
  98
  99 #define KVM_PAGES_PER_HPAGE (KVM_HPAGE_SIZE / PAGE_SIZE)
 100
 101 #define DE_VECTOR 0
 102 #define DB_VECTOR 1
 103 #define BP_VECTOR 3
 104 #define OF_VECTOR 4
 105 #define BR_VECTOR 5
 106 #define UD_VECTOR 6
 107 #define NM_VECTOR 7
 108 #define DF_VECTOR 8
 109 #define TS_VECTOR 10
 110 #define NP_VECTOR 11
 111 #define SS_VECTOR 12
 112 #define GP_VECTOR 13
 113 #define PF_VECTOR 14
 114 #define MF_VECTOR 16
 115 #define MC_VECTOR 18
 116
 117 #define SELECTOR_TI_MASK (1 << 2)
 118 #define SELECTOR_RPL_MASK 0x03
 119
 120 #define IOPL_SHIFT 12
 121
 122 #define KVM_ALIAS_SLOTS 4
 123
 124 #define KVM_PERMILLE_MMU_PAGES 20
 125 #define KVM_MIN_ALLOC_MMU_PAGES 64
 126 #define KVM_MMU_HASH_SHIFT 10
 127 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
 128 #define KVM_MIN_FREE_MMU_PAGES 5
 129 #define KVM_REFILL_PAGES 25
 130 #define KVM_MAX_CPUID_ENTRIES 40
 131 #define KVM_NR_FIXED_MTRR_REGION 88
 132 #define KVM_NR_VAR_MTRR 8
 133
 134 extern spinlock_t kvm_lock;
 135 extern struct list_head vm_list;
 136
 137 struct kvm_vcpu;
 138 struct kvm;
 139
 140 enum kvm_reg {
 141         VCPU_REGS_RAX = 0,
 142         VCPU_REGS_RCX = 1,
 143         VCPU_REGS_RDX = 2,
 144         VCPU_REGS_RBX = 3,
 145         VCPU_REGS_RSP = 4,
 146         VCPU_REGS_RBP = 5,
 147         VCPU_REGS_RSI = 6,
 148         VCPU_REGS_RDI = 7,
 149 #ifdef CONFIG_X86_64
 150         VCPU_REGS_R8 = 8,
 151         VCPU_REGS_R9 = 9,
 152         VCPU_REGS_R10 = 10,
 153         VCPU_REGS_R11 = 11,
 154         VCPU_REGS_R12 = 12,
 155         VCPU_REGS_R13 = 13,
 156         VCPU_REGS_R14 = 14,
 157         VCPU_REGS_R15 = 15,
 158 #endif
 159         VCPU_REGS_RIP,
 160         NR_VCPU_REGS
 161 };
 162
 163 enum {
 164         VCPU_SREG_ES,
 165         VCPU_SREG_CS,
 166         VCPU_SREG_SS,
 167         VCPU_SREG_DS,
 168         VCPU_SREG_FS,
 169         VCPU_SREG_GS,
 170         VCPU_SREG_TR,
 171         VCPU_SREG_LDTR,
 172 };
 173
 174 #include <asm/kvm_x86_emulate.h>
 175
 176 #define KVM_NR_MEM_OBJS 40
 177
 178 #define KVM_NR_DB_REGS  4
 179
 180 #define DR6_BD          (1 << 13)
 181 #define DR6_BS          (1 << 14)
 182 #define DR6_FIXED_1     0xffff0ff0
 183 #define DR6_VOLATILE    0x0000e00f
 184
 185 #define DR7_BP_EN_MASK  0x000000ff
 186 #define DR7_GE          (1 << 9)
 187 #define DR7_GD          (1 << 13)
 188 #define DR7_FIXED_1     0x00000400
 189 #define DR7_VOLATILE    0xffff23ff
 190
 191 /*
 192  * We don't want allocation failures within the mmu code, so we preallocate
 193  * enough memory for a single page fault in a cache.
 194  */
 195 struct kvm_mmu_memory_cache {
 196         int nobjs;
 197         void *objects[KVM_NR_MEM_OBJS];
 198 };
 199
 200 #define NR_PTE_CHAIN_ENTRIES 5
 201
 202 struct kvm_pte_chain {
 203         u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
 204         struct hlist_node link;
 205 };
 206
 207 /*
 208  * kvm_mmu_page_role, below, is defined as:
 209  *
 210  *   bits 0:3 - total guest paging levels (2-4, or zero for real mode)
 211  *   bits 4:7 - page table level for this shadow (1-4)
 212  *   bits 8:9 - page table quadrant for 2-level guests
 213  *   bit   16 - direct mapping of virtual to physical mapping at gfn
 214  *              used for real mode and two-dimensional paging
 215  *   bits 17:19 - common access permissions for all ptes in this shadow page
 216  */
 217 union kvm_mmu_page_role {
 218         unsigned word;
 219         struct {
 220                 unsigned glevels:4;
 221                 unsigned level:4;
 222                 unsigned quadrant:2;
 223                 unsigned pad_for_nice_hex_output:6;
 224                 unsigned direct:1;
 225                 unsigned access:3;
 226                 unsigned invalid:1;
 227                 unsigned cr4_pge:1;
 228                 unsigned nxe:1;
 229         };
 230 };
 231
 232 struct kvm_mmu_page {
 233         struct list_head link;
 234         struct hlist_node hash_link;
 235
 236         struct list_head oos_link;
 237
 238         /*
 239          * The following two entries are used to key the shadow page in the
 240          * hash table.
 241          */
 242         gfn_t gfn;
 243         union kvm_mmu_page_role role;
 244
 245         u64 *spt;
 246         /* hold the gfn of each spte inside spt */
 247         gfn_t *gfns;
 248         /*
 249          * One bit set per slot which has memory
 250          * in this shadow page.
 251          */
 252         DECLARE_BITMAP(slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS);
 253         int multimapped;         /* More than one parent_pte? */
 254         int root_count;          /* Currently serving as active root */
 255         bool unsync;
 256         unsigned int unsync_children;
 257         union {
 258                 u64 *parent_pte;               /* !multimapped */
 259                 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
 260         };
 261         DECLARE_BITMAP(unsync_child_bitmap, 512);
 262 };
 263
 264 struct kvm_pv_mmu_op_buffer {
 265         void *ptr;
 266         unsigned len;
 267         unsigned processed;
 268         char buf[512] __aligned(sizeof(long));
 269 };
 270
 271 struct kvm_pio_request {
 272         unsigned long count;
 273         int cur_count;
 274         gva_t guest_gva;
 275         int in;
 276         int port;
 277         int size;
 278         int string;
 279         int down;
 280         int rep;
 281 };
 282
 283 /*
 284  * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 285  * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 286  * mode.
 287  */
 288 struct kvm_mmu {
 289         void (*new_cr3)(struct kvm_vcpu *vcpu);
 290         int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
 291         void (*free)(struct kvm_vcpu *vcpu);
 292         gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
 293         void (*prefetch_page)(struct kvm_vcpu *vcpu,
 294                               struct kvm_mmu_page *page);
 295         int (*sync_page)(struct kvm_vcpu *vcpu,
 296                          struct kvm_mmu_page *sp);
 297         void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
 298         hpa_t root_hpa;
 299         int root_level;
 300         int shadow_root_level;
 301         union kvm_mmu_page_role base_role;
 302
 303         u64 *pae_root;
 304         u64 rsvd_bits_mask[2][4];
 305 };
 306
 307 struct kvm_vcpu_arch {
 308         u64 host_tsc;
 309         int interrupt_window_open;
 310         unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
 311         DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
 312         /*
 313          * rip and regs accesses must go through
 314          * kvm_{register,rip}_{read,write} functions.
 315          */
 316         unsigned long regs[NR_VCPU_REGS];
 317         u32 regs_avail;
 318         u32 regs_dirty;
 319
 320         unsigned long cr0;
 321         unsigned long cr2;
 322         unsigned long cr3;
 323         unsigned long cr4;
 324         unsigned long cr8;
 325         u32 hflags;
 326         u64 pdptrs[4]; /* pae */
 327         u64 shadow_efer;
 328         u64 apic_base;
 329         struct kvm_lapic *apic;    /* kernel irqchip context */
 330         int32_t apic_arb_prio;
 331         int mp_state;
 332         int sipi_vector;
 333         u64 ia32_misc_enable_msr;
 334         bool tpr_access_reporting;
 335
 336         struct kvm_mmu mmu;
 337         /* only needed in kvm_pv_mmu_op() path, but it's hot so
 338          * put it here to avoid allocation */
 339         struct kvm_pv_mmu_op_buffer mmu_op_buffer;
 340
 341         struct kvm_mmu_memory_cache mmu_pte_chain_cache;
 342         struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
 343         struct kvm_mmu_memory_cache mmu_page_cache;
 344         struct kvm_mmu_memory_cache mmu_page_header_cache;
 345
 346         gfn_t last_pt_write_gfn;
 347         int   last_pt_write_count;
 348         u64  *last_pte_updated;
 349         gfn_t last_pte_gfn;
 350
 351         struct {
 352                 gfn_t gfn;      /* presumed gfn during guest pte update */
 353                 pfn_t pfn;      /* pfn corresponding to that gfn */
 354                 int largepage;
 355                 unsigned long mmu_seq;
 356         } update_pte;
 357
 358         struct i387_fxsave_struct host_fx_image;
 359         struct i387_fxsave_struct guest_fx_image;
 360
 361         gva_t mmio_fault_cr2;
 362         struct kvm_pio_request pio;
 363         void *pio_data;
 364
 365         struct kvm_queued_exception {
 366                 bool pending;
 367                 bool has_error_code;
 368                 u8 nr;
 369                 u32 error_code;
 370         } exception;
 371
 372         struct kvm_queued_interrupt {
 373                 bool pending;
 374                 u8 nr;
 375         } interrupt;
 376
 377         struct {
 378                 int active;
 379                 u8 save_iopl;
 380                 struct kvm_save_segment {
 381                         u16 selector;
 382                         unsigned long base;
 383                         u32 limit;
 384                         u32 ar;
 385                 } tr, es, ds, fs, gs;
 386         } rmode;
 387         int halt_request; /* real mode on Intel only */
 388
 389         int cpuid_nent;
 390         struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
 391         /* emulate context */
 392
 393         struct x86_emulate_ctxt emulate_ctxt;
 394
 395         gpa_t time;
 396         struct pvclock_vcpu_time_info hv_clock;
 397         unsigned int hv_clock_tsc_khz;
 398         unsigned int time_offset;
 399         struct page *time_page;
 400
 401         bool nmi_pending;
 402         bool nmi_injected;
 403         bool nmi_window_open;
 404
 405         struct mtrr_state_type mtrr_state;
 406         u32 pat;
 407
 408         int switch_db_regs;
 409         unsigned long host_db[KVM_NR_DB_REGS];
 410         unsigned long host_dr6;
 411         unsigned long host_dr7;
 412         unsigned long db[KVM_NR_DB_REGS];
 413         unsigned long dr6;
 414         unsigned long dr7;
 415         unsigned long eff_db[KVM_NR_DB_REGS];
 416 };
 417
 418 struct kvm_mem_alias {
 419         gfn_t base_gfn;
 420         unsigned long npages;
 421         gfn_t target_gfn;
 422 };
 423
 424 struct kvm_arch{
 425         int naliases;
 426         struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
 427
 428         unsigned int n_free_mmu_pages;
 429         unsigned int n_requested_mmu_pages;
 430         unsigned int n_alloc_mmu_pages;
 431         struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 432         /*
 433          * Hash table of struct kvm_mmu_page.
 434          */
 435         struct list_head active_mmu_pages;
 436         struct list_head assigned_dev_head;
 437         struct iommu_domain *iommu_domain;
 438         struct kvm_pic *vpic;
 439         struct kvm_ioapic *vioapic;
 440         struct kvm_pit *vpit;
 441         struct hlist_head irq_ack_notifier_list;
 442         int vapics_in_nmi_mode;
 443
 444         unsigned int tss_addr;
 445         struct page *apic_access_page;
 446
 447         gpa_t wall_clock;
 448
 449         struct page *ept_identity_pagetable;
 450         bool ept_identity_pagetable_done;
 451
 452         unsigned long irq_sources_bitmap;
 453         unsigned long irq_states[KVM_IOAPIC_NUM_PINS];
 454         u64 vm_init_tsc;
 455 };
 456
 457 struct kvm_vm_stat {
 458         u32 mmu_shadow_zapped;
 459         u32 mmu_pte_write;
 460         u32 mmu_pte_updated;
 461         u32 mmu_pde_zapped;
 462         u32 mmu_flooded;
 463         u32 mmu_recycled;
 464         u32 mmu_cache_miss;
 465         u32 mmu_unsync;
 466         u32 remote_tlb_flush;
 467         u32 lpages;
 468 };
 469
 470 struct kvm_vcpu_stat {
 471         u32 pf_fixed;
 472         u32 pf_guest;
 473         u32 tlb_flush;
 474         u32 invlpg;
 475
 476         u32 exits;
 477         u32 io_exits;
 478         u32 mmio_exits;
 479         u32 signal_exits;
 480         u32 irq_window_exits;
 481         u32 nmi_window_exits;
 482         u32 halt_exits;
 483         u32 halt_wakeup;
 484         u32 request_irq_exits;
 485         u32 request_nmi_exits;
 486         u32 irq_exits;
 487         u32 host_state_reload;
 488         u32 efer_reload;
 489         u32 fpu_reload;
 490         u32 insn_emulation;
 491         u32 insn_emulation_fail;
 492         u32 hypercalls;
 493         u32 irq_injections;
 494         u32 nmi_injections;
 495 };
 496
 497 struct descriptor_table {
 498         u16 limit;
 499         unsigned long base;
 500 } __attribute__((packed));
 501
 502 struct kvm_x86_ops {
 503         int (*cpu_has_kvm_support)(void);          /* __init */
 504         int (*disabled_by_bios)(void);             /* __init */
 505         void (*hardware_enable)(void *dummy);      /* __init */
 506         void (*hardware_disable)(void *dummy);
 507         void (*check_processor_compatibility)(void *rtn);
 508         int (*hardware_setup)(void);               /* __init */
 509         void (*hardware_unsetup)(void);            /* __exit */
 510         bool (*cpu_has_accelerated_tpr)(void);
 511
 512         /* Create, but do not attach this VCPU */
 513         struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
 514         void (*vcpu_free)(struct kvm_vcpu *vcpu);
 515         int (*vcpu_reset)(struct kvm_vcpu *vcpu);
 516
 517         void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
 518         void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
 519         void (*vcpu_put)(struct kvm_vcpu *vcpu);
 520
 521         int (*set_guest_debug)(struct kvm_vcpu *vcpu,
 522                                struct kvm_guest_debug *dbg);
 523         int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
 524         int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 525         u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
 526         void (*get_segment)(struct kvm_vcpu *vcpu,
 527                             struct kvm_segment *var, int seg);
 528         int (*get_cpl)(struct kvm_vcpu *vcpu);
 529         void (*set_segment)(struct kvm_vcpu *vcpu,
 530                             struct kvm_segment *var, int seg);
 531         void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
 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 descriptor_table *dt);
 538         void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 539         void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 540         void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 541         unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
 542         void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
 543                        int *exception);
 544         void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
 545         unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
 546         void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
 547
 548         void (*tlb_flush)(struct kvm_vcpu *vcpu);
 549
 550         void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
 551         int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
 552         void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
 553         void (*patch_hypercall)(struct kvm_vcpu *vcpu,
 554                                 unsigned char *hypercall_addr);
 555         int (*get_irq)(struct kvm_vcpu *vcpu);
 556         void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
 557         void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
 558                                 bool has_error_code, u32 error_code);
 559         bool (*exception_injected)(struct kvm_vcpu *vcpu);
 560         void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
 561         void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
 562                                        struct kvm_run *run);
 563         int (*interrupt_allowed)(struct kvm_vcpu *vcpu);
 564         int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
 565         int (*get_tdp_level)(void);
 566         int (*get_mt_mask_shift)(void);
 567 };
 568
 569 extern struct kvm_x86_ops *kvm_x86_ops;
 570
 571 int kvm_mmu_module_init(void);
 572 void kvm_mmu_module_exit(void);
 573
 574 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 575 int kvm_mmu_create(struct kvm_vcpu *vcpu);
 576 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 577 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
 578 void kvm_mmu_set_base_ptes(u64 base_pte);
 579 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
 580                 u64 dirty_mask, u64 nx_mask, u64 x_mask, u64 mt_mask);
 581
 582 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 583 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
 584 void kvm_mmu_zap_all(struct kvm *kvm);
 585 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
 586 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
 587
 588 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 589
 590 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
 591                           const void *val, int bytes);
 592 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
 593                   gpa_t addr, unsigned long *ret);
 594
 595 extern bool tdp_enabled;
 596
 597 enum emulation_result {
 598         EMULATE_DONE,       /* no further processing */
 599         EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
 600         EMULATE_FAIL,         /* can't emulate this instruction */
 601 };
 602
 603 #define EMULTYPE_NO_DECODE          (1 << 0)
 604 #define EMULTYPE_TRAP_UD            (1 << 1)
 605 #define EMULTYPE_SKIP               (1 << 2)
 606 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
 607                         unsigned long cr2, u16 error_code, int emulation_type);
 608 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
 609 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 610 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 611 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
 612                    unsigned long *rflags);
 613
 614 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
 615 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
 616                      unsigned long *rflags);
 617 void kvm_enable_efer_bits(u64);
 618 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
 619 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 620
 621 struct x86_emulate_ctxt;
 622
 623 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 624                      int size, unsigned port);
 625 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 626                            int size, unsigned long count, int down,
 627                             gva_t address, int rep, unsigned port);
 628 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
 629 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
 630 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
 631 int emulate_clts(struct kvm_vcpu *vcpu);
 632 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
 633                     unsigned long *dest);
 634 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
 635                     unsigned long value);
 636
 637 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
 638 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
 639                                 int type_bits, int seg);
 640
 641 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason);
 642
 643 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 644 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
 645 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
 646 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
 647 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
 648 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 649 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
 650
 651 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 652 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 653
 654 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 655 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 656 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
 657                            u32 error_code);
 658
 659 int kvm_pic_set_irq(void *opaque, int irq, int level);
 660
 661 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
 662
 663 void fx_init(struct kvm_vcpu *vcpu);
 664
 665 int emulator_write_emulated(unsigned long addr,
 666                             const void *val,
 667                             unsigned int bytes,
 668                             struct kvm_vcpu *vcpu);
 669
 670 unsigned long segment_base(u16 selector);
 671
 672 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
 673 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 674                        const u8 *new, int bytes,
 675                        bool guest_initiated);
 676 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 677 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 678 int kvm_mmu_load(struct kvm_vcpu *vcpu);
 679 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
 680 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
 681
 682 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
 683
 684 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
 685
 686 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
 687 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
 688
 689 void kvm_enable_tdp(void);
 690 void kvm_disable_tdp(void);
 691
 692 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 693 int complete_pio(struct kvm_vcpu *vcpu);
 694
 695 struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn);
 696
 697 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
 698 {
 699         struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
 700
 701         return (struct kvm_mmu_page *)page_private(page);
 702 }
 703
 704 static inline u16 kvm_read_fs(void)
 705 {
 706         u16 seg;
 707         asm("mov %%fs, %0" : "=g"(seg));
 708         return seg;
 709 }
 710
 711 static inline u16 kvm_read_gs(void)
 712 {
 713         u16 seg;
 714         asm("mov %%gs, %0" : "=g"(seg));
 715         return seg;
 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_fs(u16 sel)
 726 {
 727         asm("mov %0, %%fs" : : "rm"(sel));
 728 }
 729
 730 static inline void kvm_load_gs(u16 sel)
 731 {
 732         asm("mov %0, %%gs" : : "rm"(sel));
 733 }
 734
 735 static inline void kvm_load_ldt(u16 sel)
 736 {
 737         asm("lldt %0" : : "rm"(sel));
 738 }
 739
 740 static inline void kvm_get_idt(struct descriptor_table *table)
 741 {
 742         asm("sidt %0" : "=m"(*table));
 743 }
 744
 745 static inline void kvm_get_gdt(struct descriptor_table *table)
 746 {
 747         asm("sgdt %0" : "=m"(*table));
 748 }
 749
 750 static inline unsigned long kvm_read_tr_base(void)
 751 {
 752         u16 tr;
 753         asm("str %0" : "=g"(tr));
 754         return segment_base(tr);
 755 }
 756
 757 #ifdef CONFIG_X86_64
 758 static inline unsigned long read_msr(unsigned long msr)
 759 {
 760         u64 value;
 761
 762         rdmsrl(msr, value);
 763         return value;
 764 }
 765 #endif
 766
 767 static inline void kvm_fx_save(struct i387_fxsave_struct *image)
 768 {
 769         asm("fxsave (%0)":: "r" (image));
 770 }
 771
 772 static inline void kvm_fx_restore(struct i387_fxsave_struct *image)
 773 {
 774         asm("fxrstor (%0)":: "r" (image));
 775 }
 776
 777 static inline void kvm_fx_finit(void)
 778 {
 779         asm("finit");
 780 }
 781
 782 static inline u32 get_rdx_init_val(void)
 783 {
 784         return 0x600; /* P6 family */
 785 }
 786
 787 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
 788 {
 789         kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
 790 }
 791
 792 #define MSR_IA32_TIME_STAMP_COUNTER             0x010
 793
 794 #define TSS_IOPB_BASE_OFFSET 0x66
 795 #define TSS_BASE_SIZE 0x68
 796 #define TSS_IOPB_SIZE (65536 / 8)
 797 #define TSS_REDIRECTION_SIZE (256 / 8)
 798 #define RMODE_TSS_SIZE                                                  \
 799         (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
 800
 801 enum {
 802         TASK_SWITCH_CALL = 0,
 803         TASK_SWITCH_IRET = 1,
 804         TASK_SWITCH_JMP = 2,
 805         TASK_SWITCH_GATE = 3,
 806 };
 807
 808 #define HF_GIF_MASK             (1 << 0)
 809 #define HF_HIF_MASK             (1 << 1)
 810 #define HF_VINTR_MASK           (1 << 2)
 811
 812 /*
 813  * Hardware virtualization extension instructions may fault if a
 814  * reboot turns off virtualization while processes are running.
 815  * Trap the fault and ignore the instruction if that happens.
 816  */
 817 asmlinkage void kvm_handle_fault_on_reboot(void);
 818
 819 #define __kvm_handle_fault_on_reboot(insn) \
 820         "666: " insn "\n\t" \
 821         ".pushsection .fixup, \"ax\" \n" \
 822         "667: \n\t" \
 823         __ASM_SIZE(push) " $666b \n\t"        \
 824         "jmp kvm_handle_fault_on_reboot \n\t" \
 825         ".popsection \n\t" \
 826         ".pushsection __ex_table, \"a\" \n\t" \
 827         _ASM_PTR " 666b, 667b \n\t" \
 828         ".popsection"
 829
 830 #define KVM_ARCH_WANT_MMU_NOTIFIER
 831 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
 832 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
 833 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu);
 834
 835 #endif /* _ASM_X86_KVM_HOST_H */