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
  18 #include <linux/kvm.h>
  19 #include <linux/kvm_para.h>
  20 #include <linux/kvm_types.h>
  21
  22 #include <asm/pvclock-abi.h>
  23 #include <asm/desc.h>
  24 #include <asm/mtrr.h>
  25 #include <asm/msr-index.h>
  26
  27 #define KVM_MAX_VCPUS 16
  28 #define KVM_MEMORY_SLOTS 32
  29 /* memory slots that does not exposed to userspace */
  30 #define KVM_PRIVATE_MEM_SLOTS 4
  31
  32 #define KVM_PIO_PAGE_OFFSET 1
  33 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2
  34
  35 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
  36 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
  37 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS |    \
  38                                   0xFFFFFF0000000000ULL)
  39
  40 #define KVM_GUEST_CR0_MASK                                 \
  41         (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
  42          | X86_CR0_NW | X86_CR0_CD)
  43 #define KVM_VM_CR0_ALWAYS_ON                                            \
  44         (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
  45          | X86_CR0_MP)
  46 #define KVM_GUEST_CR4_MASK                                              \
  47         (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
  48 #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
  49 #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
  50
  51 #define INVALID_PAGE (~(hpa_t)0)
  52 #define UNMAPPED_GVA (~(gpa_t)0)
  53
  54 /* shadow tables are PAE even on non-PAE hosts */
  55 #define KVM_HPAGE_SHIFT 21
  56 #define KVM_HPAGE_SIZE (1UL << KVM_HPAGE_SHIFT)
  57 #define KVM_HPAGE_MASK (~(KVM_HPAGE_SIZE - 1))
  58
  59 #define KVM_PAGES_PER_HPAGE (KVM_HPAGE_SIZE / PAGE_SIZE)
  60
  61 #define DE_VECTOR 0
  62 #define DB_VECTOR 1
  63 #define BP_VECTOR 3
  64 #define OF_VECTOR 4
  65 #define BR_VECTOR 5
  66 #define UD_VECTOR 6
  67 #define NM_VECTOR 7
  68 #define DF_VECTOR 8
  69 #define TS_VECTOR 10
  70 #define NP_VECTOR 11
  71 #define SS_VECTOR 12
  72 #define GP_VECTOR 13
  73 #define PF_VECTOR 14
  74 #define MF_VECTOR 16
  75 #define MC_VECTOR 18
  76
  77 #define SELECTOR_TI_MASK (1 << 2)
  78 #define SELECTOR_RPL_MASK 0x03
  79
  80 #define IOPL_SHIFT 12
  81
  82 #define KVM_ALIAS_SLOTS 4
  83
  84 #define KVM_PERMILLE_MMU_PAGES 20
  85 #define KVM_MIN_ALLOC_MMU_PAGES 64
  86 #define KVM_MMU_HASH_SHIFT 10
  87 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
  88 #define KVM_MIN_FREE_MMU_PAGES 5
  89 #define KVM_REFILL_PAGES 25
  90 #define KVM_MAX_CPUID_ENTRIES 40
  91 #define KVM_NR_FIXED_MTRR_REGION 88
  92 #define KVM_NR_VAR_MTRR 8
  93
  94 extern spinlock_t kvm_lock;
  95 extern struct list_head vm_list;
  96
  97 struct kvm_vcpu;
  98 struct kvm;
  99
 100 enum kvm_reg {
 101         VCPU_REGS_RAX = 0,
 102         VCPU_REGS_RCX = 1,
 103         VCPU_REGS_RDX = 2,
 104         VCPU_REGS_RBX = 3,
 105         VCPU_REGS_RSP = 4,
 106         VCPU_REGS_RBP = 5,
 107         VCPU_REGS_RSI = 6,
 108         VCPU_REGS_RDI = 7,
 109 #ifdef CONFIG_X86_64
 110         VCPU_REGS_R8 = 8,
 111         VCPU_REGS_R9 = 9,
 112         VCPU_REGS_R10 = 10,
 113         VCPU_REGS_R11 = 11,
 114         VCPU_REGS_R12 = 12,
 115         VCPU_REGS_R13 = 13,
 116         VCPU_REGS_R14 = 14,
 117         VCPU_REGS_R15 = 15,
 118 #endif
 119         VCPU_REGS_RIP,
 120         NR_VCPU_REGS
 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_x86_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 glevels:4;
 181                 unsigned level:4;
 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 cr4_pge:1;
 188                 unsigned nxe:1;
 189         };
 190 };
 191
 192 struct kvm_mmu_page {
 193         struct list_head link;
 194         struct hlist_node hash_link;
 195
 196         struct list_head oos_link;
 197
 198         /*
 199          * The following two entries are used to key the shadow page in the
 200          * hash table.
 201          */
 202         gfn_t gfn;
 203         union kvm_mmu_page_role role;
 204
 205         u64 *spt;
 206         /* hold the gfn of each spte inside spt */
 207         gfn_t *gfns;
 208         /*
 209          * One bit set per slot which has memory
 210          * in this shadow page.
 211          */
 212         DECLARE_BITMAP(slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS);
 213         int multimapped;         /* More than one parent_pte? */
 214         int root_count;          /* Currently serving as active root */
 215         bool unsync;
 216         bool global;
 217         unsigned int unsync_children;
 218         union {
 219                 u64 *parent_pte;               /* !multimapped */
 220                 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
 221         };
 222         DECLARE_BITMAP(unsync_child_bitmap, 512);
 223 };
 224
 225 struct kvm_pv_mmu_op_buffer {
 226         void *ptr;
 227         unsigned len;
 228         unsigned processed;
 229         char buf[512] __aligned(sizeof(long));
 230 };
 231
 232 struct kvm_pio_request {
 233         unsigned long count;
 234         int cur_count;
 235         gva_t guest_gva;
 236         int in;
 237         int port;
 238         int size;
 239         int string;
 240         int down;
 241         int rep;
 242 };
 243
 244 /*
 245  * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 246  * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 247  * mode.
 248  */
 249 struct kvm_mmu {
 250         void (*new_cr3)(struct kvm_vcpu *vcpu);
 251         int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
 252         void (*free)(struct kvm_vcpu *vcpu);
 253         gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
 254         void (*prefetch_page)(struct kvm_vcpu *vcpu,
 255                               struct kvm_mmu_page *page);
 256         int (*sync_page)(struct kvm_vcpu *vcpu,
 257                          struct kvm_mmu_page *sp);
 258         void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
 259         hpa_t root_hpa;
 260         int root_level;
 261         int shadow_root_level;
 262         union kvm_mmu_page_role base_role;
 263
 264         u64 *pae_root;
 265 };
 266
 267 struct kvm_vcpu_arch {
 268         u64 host_tsc;
 269         int interrupt_window_open;
 270         unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
 271         DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
 272         /*
 273          * rip and regs accesses must go through
 274          * kvm_{register,rip}_{read,write} functions.
 275          */
 276         unsigned long regs[NR_VCPU_REGS];
 277         u32 regs_avail;
 278         u32 regs_dirty;
 279
 280         unsigned long cr0;
 281         unsigned long cr2;
 282         unsigned long cr3;
 283         unsigned long cr4;
 284         unsigned long cr8;
 285         u32 hflags;
 286         u64 pdptrs[4]; /* pae */
 287         u64 shadow_efer;
 288         u64 apic_base;
 289         struct kvm_lapic *apic;    /* kernel irqchip context */
 290         int mp_state;
 291         int sipi_vector;
 292         u64 ia32_misc_enable_msr;
 293         bool tpr_access_reporting;
 294
 295         struct kvm_mmu mmu;
 296         /* only needed in kvm_pv_mmu_op() path, but it's hot so
 297          * put it here to avoid allocation */
 298         struct kvm_pv_mmu_op_buffer mmu_op_buffer;
 299
 300         struct kvm_mmu_memory_cache mmu_pte_chain_cache;
 301         struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
 302         struct kvm_mmu_memory_cache mmu_page_cache;
 303         struct kvm_mmu_memory_cache mmu_page_header_cache;
 304
 305         gfn_t last_pt_write_gfn;
 306         int   last_pt_write_count;
 307         u64  *last_pte_updated;
 308         gfn_t last_pte_gfn;
 309
 310         struct {
 311                 gfn_t gfn;      /* presumed gfn during guest pte update */
 312                 pfn_t pfn;      /* pfn corresponding to that gfn */
 313                 int largepage;
 314                 unsigned long mmu_seq;
 315         } update_pte;
 316
 317         struct i387_fxsave_struct host_fx_image;
 318         struct i387_fxsave_struct guest_fx_image;
 319
 320         gva_t mmio_fault_cr2;
 321         struct kvm_pio_request pio;
 322         void *pio_data;
 323
 324         struct kvm_queued_exception {
 325                 bool pending;
 326                 bool has_error_code;
 327                 u8 nr;
 328                 u32 error_code;
 329         } exception;
 330
 331         struct kvm_queued_interrupt {
 332                 bool pending;
 333                 u8 nr;
 334         } interrupt;
 335
 336         struct {
 337                 int active;
 338                 u8 save_iopl;
 339                 struct kvm_save_segment {
 340                         u16 selector;
 341                         unsigned long base;
 342                         u32 limit;
 343                         u32 ar;
 344                 } tr, es, ds, fs, gs;
 345         } rmode;
 346         int halt_request; /* real mode on Intel only */
 347
 348         int cpuid_nent;
 349         struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
 350         /* emulate context */
 351
 352         struct x86_emulate_ctxt emulate_ctxt;
 353
 354         gpa_t time;
 355         struct pvclock_vcpu_time_info hv_clock;
 356         unsigned int hv_clock_tsc_khz;
 357         unsigned int time_offset;
 358         struct page *time_page;
 359
 360         bool nmi_pending;
 361         bool nmi_injected;
 362         bool nmi_window_open;
 363
 364         struct mtrr_state_type mtrr_state;
 365         u32 pat;
 366
 367         int switch_db_regs;
 368         unsigned long host_db[KVM_NR_DB_REGS];
 369         unsigned long host_dr6;
 370         unsigned long host_dr7;
 371         unsigned long db[KVM_NR_DB_REGS];
 372         unsigned long dr6;
 373         unsigned long dr7;
 374         unsigned long eff_db[KVM_NR_DB_REGS];
 375
 376         u32 exit_reason;
 377 };
 378
 379 struct kvm_mem_alias {
 380         gfn_t base_gfn;
 381         unsigned long npages;
 382         gfn_t target_gfn;
 383 };
 384
 385 struct kvm_arch{
 386         int naliases;
 387         struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
 388
 389         unsigned int n_free_mmu_pages;
 390         unsigned int n_requested_mmu_pages;
 391         unsigned int n_alloc_mmu_pages;
 392         struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 393         /*
 394          * Hash table of struct kvm_mmu_page.
 395          */
 396         struct list_head active_mmu_pages;
 397         struct list_head assigned_dev_head;
 398         struct list_head oos_global_pages;
 399         struct iommu_domain *iommu_domain;
 400         struct kvm_pic *vpic;
 401         struct kvm_ioapic *vioapic;
 402         struct kvm_pit *vpit;
 403         struct hlist_head irq_ack_notifier_list;
 404         int vapics_in_nmi_mode;
 405
 406         int round_robin_prev_vcpu;
 407         unsigned int tss_addr;
 408         struct page *apic_access_page;
 409
 410         gpa_t wall_clock;
 411
 412         struct page *ept_identity_pagetable;
 413         bool ept_identity_pagetable_done;
 414
 415         unsigned long irq_sources_bitmap;
 416         unsigned long irq_states[KVM_IOAPIC_NUM_PINS];
 417         u64 vm_init_tsc;
 418 };
 419
 420 struct kvm_vm_stat {
 421         u32 mmu_shadow_zapped;
 422         u32 mmu_pte_write;
 423         u32 mmu_pte_updated;
 424         u32 mmu_pde_zapped;
 425         u32 mmu_flooded;
 426         u32 mmu_recycled;
 427         u32 mmu_cache_miss;
 428         u32 mmu_unsync;
 429         u32 mmu_unsync_global;
 430         u32 remote_tlb_flush;
 431         u32 lpages;
 432 };
 433
 434 struct kvm_vcpu_stat {
 435         u32 pf_fixed;
 436         u32 pf_guest;
 437         u32 tlb_flush;
 438         u32 invlpg;
 439
 440         u32 exits;
 441         u32 io_exits;
 442         u32 mmio_exits;
 443         u32 signal_exits;
 444         u32 irq_window_exits;
 445         u32 nmi_window_exits;
 446         u32 halt_exits;
 447         u32 halt_wakeup;
 448         u32 request_irq_exits;
 449         u32 request_nmi_exits;
 450         u32 irq_exits;
 451         u32 host_state_reload;
 452         u32 efer_reload;
 453         u32 fpu_reload;
 454         u32 insn_emulation;
 455         u32 insn_emulation_fail;
 456         u32 hypercalls;
 457         u32 irq_injections;
 458         u32 nmi_injections;
 459 };
 460
 461 struct descriptor_table {
 462         u16 limit;
 463         unsigned long base;
 464 } __attribute__((packed));
 465
 466 struct kvm_x86_ops {
 467         int (*cpu_has_kvm_support)(void);          /* __init */
 468         int (*disabled_by_bios)(void);             /* __init */
 469         void (*hardware_enable)(void *dummy);      /* __init */
 470         void (*hardware_disable)(void *dummy);
 471         void (*check_processor_compatibility)(void *rtn);
 472         int (*hardware_setup)(void);               /* __init */
 473         void (*hardware_unsetup)(void);            /* __exit */
 474         bool (*cpu_has_accelerated_tpr)(void);
 475
 476         /* Create, but do not attach this VCPU */
 477         struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
 478         void (*vcpu_free)(struct kvm_vcpu *vcpu);
 479         int (*vcpu_reset)(struct kvm_vcpu *vcpu);
 480
 481         void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
 482         void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
 483         void (*vcpu_put)(struct kvm_vcpu *vcpu);
 484
 485         int (*set_guest_debug)(struct kvm_vcpu *vcpu,
 486                                struct kvm_guest_debug *dbg);
 487         int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
 488         int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 489         u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
 490         void (*get_segment)(struct kvm_vcpu *vcpu,
 491                             struct kvm_segment *var, int seg);
 492         int (*get_cpl)(struct kvm_vcpu *vcpu);
 493         void (*set_segment)(struct kvm_vcpu *vcpu,
 494                             struct kvm_segment *var, int seg);
 495         void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
 496         void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
 497         void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
 498         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 499         void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
 500         void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
 501         void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 502         void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 503         void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 504         void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 505         unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
 506         void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
 507                        int *exception);
 508         void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
 509         unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
 510         void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
 511
 512         void (*tlb_flush)(struct kvm_vcpu *vcpu);
 513
 514         void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
 515         int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
 516         void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
 517         void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
 518         u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
 519         void (*patch_hypercall)(struct kvm_vcpu *vcpu,
 520                                 unsigned char *hypercall_addr);
 521         int (*get_irq)(struct kvm_vcpu *vcpu);
 522         void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
 523         void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
 524                                 bool has_error_code, u32 error_code);
 525         bool (*exception_injected)(struct kvm_vcpu *vcpu);
 526         void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
 527         void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
 528                                        struct kvm_run *run);
 529
 530         int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
 531         int (*get_tdp_level)(void);
 532         int (*get_mt_mask_shift)(void);
 533 };
 534
 535 extern struct kvm_x86_ops *kvm_x86_ops;
 536
 537 int kvm_mmu_module_init(void);
 538 void kvm_mmu_module_exit(void);
 539
 540 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 541 int kvm_mmu_create(struct kvm_vcpu *vcpu);
 542 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 543 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
 544 void kvm_mmu_set_base_ptes(u64 base_pte);
 545 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
 546                 u64 dirty_mask, u64 nx_mask, u64 x_mask, u64 mt_mask);
 547
 548 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 549 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
 550 void kvm_mmu_zap_all(struct kvm *kvm);
 551 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
 552 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
 553
 554 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 555
 556 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
 557                           const void *val, int bytes);
 558 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
 559                   gpa_t addr, unsigned long *ret);
 560
 561 extern bool tdp_enabled;
 562
 563 enum emulation_result {
 564         EMULATE_DONE,       /* no further processing */
 565         EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
 566         EMULATE_FAIL,         /* can't emulate this instruction */
 567 };
 568
 569 #define EMULTYPE_NO_DECODE          (1 << 0)
 570 #define EMULTYPE_TRAP_UD            (1 << 1)
 571 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
 572                         unsigned long cr2, u16 error_code, int emulation_type);
 573 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
 574 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 575 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 576 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
 577                    unsigned long *rflags);
 578
 579 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
 580 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
 581                      unsigned long *rflags);
 582 void kvm_enable_efer_bits(u64);
 583 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
 584 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 585
 586 struct x86_emulate_ctxt;
 587
 588 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 589                      int size, unsigned port);
 590 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 591                            int size, unsigned long count, int down,
 592                             gva_t address, int rep, unsigned port);
 593 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
 594 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
 595 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
 596 int emulate_clts(struct kvm_vcpu *vcpu);
 597 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
 598                     unsigned long *dest);
 599 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
 600                     unsigned long value);
 601
 602 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
 603 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
 604                                 int type_bits, int seg);
 605
 606 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason);
 607
 608 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 609 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
 610 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
 611 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
 612 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
 613 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 614 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
 615
 616 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 617 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 618
 619 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 620 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 621 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
 622                            u32 error_code);
 623 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl);
 624
 625 int kvm_pic_set_irq(void *opaque, int irq, int level);
 626
 627 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
 628
 629 void fx_init(struct kvm_vcpu *vcpu);
 630
 631 int emulator_write_emulated(unsigned long addr,
 632                             const void *val,
 633                             unsigned int bytes,
 634                             struct kvm_vcpu *vcpu);
 635
 636 unsigned long segment_base(u16 selector);
 637
 638 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
 639 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 640                        const u8 *new, int bytes,
 641                        bool guest_initiated);
 642 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 643 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 644 int kvm_mmu_load(struct kvm_vcpu *vcpu);
 645 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
 646 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
 647 void kvm_mmu_sync_global(struct kvm_vcpu *vcpu);
 648
 649 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
 650
 651 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
 652
 653 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
 654 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
 655
 656 void kvm_enable_tdp(void);
 657 void kvm_disable_tdp(void);
 658
 659 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 660 int complete_pio(struct kvm_vcpu *vcpu);
 661
 662 struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn);
 663
 664 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
 665 {
 666         struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
 667
 668         return (struct kvm_mmu_page *)page_private(page);
 669 }
 670
 671 static inline u16 kvm_read_fs(void)
 672 {
 673         u16 seg;
 674         asm("mov %%fs, %0" : "=g"(seg));
 675         return seg;
 676 }
 677
 678 static inline u16 kvm_read_gs(void)
 679 {
 680         u16 seg;
 681         asm("mov %%gs, %0" : "=g"(seg));
 682         return seg;
 683 }
 684
 685 static inline u16 kvm_read_ldt(void)
 686 {
 687         u16 ldt;
 688         asm("sldt %0" : "=g"(ldt));
 689         return ldt;
 690 }
 691
 692 static inline void kvm_load_fs(u16 sel)
 693 {
 694         asm("mov %0, %%fs" : : "rm"(sel));
 695 }
 696
 697 static inline void kvm_load_gs(u16 sel)
 698 {
 699         asm("mov %0, %%gs" : : "rm"(sel));
 700 }
 701
 702 static inline void kvm_load_ldt(u16 sel)
 703 {
 704         asm("lldt %0" : : "rm"(sel));
 705 }
 706
 707 static inline void kvm_get_idt(struct descriptor_table *table)
 708 {
 709         asm("sidt %0" : "=m"(*table));
 710 }
 711
 712 static inline void kvm_get_gdt(struct descriptor_table *table)
 713 {
 714         asm("sgdt %0" : "=m"(*table));
 715 }
 716
 717 static inline unsigned long kvm_read_tr_base(void)
 718 {
 719         u16 tr;
 720         asm("str %0" : "=g"(tr));
 721         return segment_base(tr);
 722 }
 723
 724 #ifdef CONFIG_X86_64
 725 static inline unsigned long read_msr(unsigned long msr)
 726 {
 727         u64 value;
 728
 729         rdmsrl(msr, value);
 730         return value;
 731 }
 732 #endif
 733
 734 static inline void kvm_fx_save(struct i387_fxsave_struct *image)
 735 {
 736         asm("fxsave (%0)":: "r" (image));
 737 }
 738
 739 static inline void kvm_fx_restore(struct i387_fxsave_struct *image)
 740 {
 741         asm("fxrstor (%0)":: "r" (image));
 742 }
 743
 744 static inline void kvm_fx_finit(void)
 745 {
 746         asm("finit");
 747 }
 748
 749 static inline u32 get_rdx_init_val(void)
 750 {
 751         return 0x600; /* P6 family */
 752 }
 753
 754 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
 755 {
 756         kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
 757 }
 758
 759 #define MSR_IA32_TIME_STAMP_COUNTER             0x010
 760
 761 #define TSS_IOPB_BASE_OFFSET 0x66
 762 #define TSS_BASE_SIZE 0x68
 763 #define TSS_IOPB_SIZE (65536 / 8)
 764 #define TSS_REDIRECTION_SIZE (256 / 8)
 765 #define RMODE_TSS_SIZE                                                  \
 766         (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
 767
 768 enum {
 769         TASK_SWITCH_CALL = 0,
 770         TASK_SWITCH_IRET = 1,
 771         TASK_SWITCH_JMP = 2,
 772         TASK_SWITCH_GATE = 3,
 773 };
 774
 775 #define HF_GIF_MASK             (1 << 0)
 776 #define HF_HIF_MASK             (1 << 1)
 777 #define HF_VINTR_MASK           (1 << 2)
 778
 779 /*
 780  * Hardware virtualization extension instructions may fault if a
 781  * reboot turns off virtualization while processes are running.
 782  * Trap the fault and ignore the instruction if that happens.
 783  */
 784 asmlinkage void kvm_handle_fault_on_reboot(void);
 785
 786 #define __kvm_handle_fault_on_reboot(insn) \
 787         "666: " insn "\n\t" \
 788         ".pushsection .fixup, \"ax\" \n" \
 789         "667: \n\t" \
 790         __ASM_SIZE(push) " $666b \n\t"        \
 791         "jmp kvm_handle_fault_on_reboot \n\t" \
 792         ".popsection \n\t" \
 793         ".pushsection __ex_table, \"a\" \n\t" \
 794         _ASM_PTR " 666b, 667b \n\t" \
 795         ".popsection"
 796
 797 #define KVM_ARCH_WANT_MMU_NOTIFIER
 798 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
 799 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
 800
 801 #endif /* _ASM_X86_KVM_HOST_H */