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