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 19 #include <linux/kvm.h> 20 #include <linux/kvm_para.h> 21 #include <linux/kvm_types.h> 22 23 #include <asm/pvclock-abi.h> 24 #include <asm/desc.h> 25 #include <asm/mtrr.h> 26 #include <asm/msr-index.h> 27 28 #define KVM_MAX_VCPUS 64 29 #define KVM_MEMORY_SLOTS 32 30 /* memory slots that does not exposed to userspace */ 31 #define KVM_PRIVATE_MEM_SLOTS 4 32 33 #define KVM_PIO_PAGE_OFFSET 1 34 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2 35 36 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1) 37 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD)) 38 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \ 39 0xFFFFFF0000000000ULL) 40 41 #define INVALID_PAGE (~(hpa_t)0) 42 #define UNMAPPED_GVA (~(gpa_t)0) 43 44 /* KVM Hugepage definitions for x86 */ 45 #define KVM_NR_PAGE_SIZES 3 46 #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + (((x) - 1) * 9)) 47 #define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x)) 48 #define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1)) 49 #define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE) 50 51 #define DE_VECTOR 0 52 #define DB_VECTOR 1 53 #define BP_VECTOR 3 54 #define OF_VECTOR 4 55 #define BR_VECTOR 5 56 #define UD_VECTOR 6 57 #define NM_VECTOR 7 58 #define DF_VECTOR 8 59 #define TS_VECTOR 10 60 #define NP_VECTOR 11 61 #define SS_VECTOR 12 62 #define GP_VECTOR 13 63 #define PF_VECTOR 14 64 #define MF_VECTOR 16 65 #define MC_VECTOR 18 66 67 #define SELECTOR_TI_MASK (1 << 2) 68 #define SELECTOR_RPL_MASK 0x03 69 70 #define IOPL_SHIFT 12 71 72 #define KVM_ALIAS_SLOTS 4 73 74 #define KVM_PERMILLE_MMU_PAGES 20 75 #define KVM_MIN_ALLOC_MMU_PAGES 64 76 #define KVM_MMU_HASH_SHIFT 10 77 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT) 78 #define KVM_MIN_FREE_MMU_PAGES 5 79 #define KVM_REFILL_PAGES 25 80 #define KVM_MAX_CPUID_ENTRIES 40 81 #define KVM_NR_FIXED_MTRR_REGION 88 82 #define KVM_NR_VAR_MTRR 8 83 84 extern spinlock_t kvm_lock; 85 extern struct list_head vm_list; 86 87 struct kvm_vcpu; 88 struct kvm; 89 90 enum kvm_reg { 91 VCPU_REGS_RAX = 0, 92 VCPU_REGS_RCX = 1, 93 VCPU_REGS_RDX = 2, 94 VCPU_REGS_RBX = 3, 95 VCPU_REGS_RSP = 4, 96 VCPU_REGS_RBP = 5, 97 VCPU_REGS_RSI = 6, 98 VCPU_REGS_RDI = 7, 99 #ifdef CONFIG_X86_64 100 VCPU_REGS_R8 = 8, 101 VCPU_REGS_R9 = 9, 102 VCPU_REGS_R10 = 10, 103 VCPU_REGS_R11 = 11, 104 VCPU_REGS_R12 = 12, 105 VCPU_REGS_R13 = 13, 106 VCPU_REGS_R14 = 14, 107 VCPU_REGS_R15 = 15, 108 #endif 109 VCPU_REGS_RIP, 110 NR_VCPU_REGS 111 }; 112 113 enum kvm_reg_ex { 114 VCPU_EXREG_PDPTR = NR_VCPU_REGS, 115 }; 116 117 enum { 118 VCPU_SREG_ES, 119 VCPU_SREG_CS, 120 VCPU_SREG_SS, 121 VCPU_SREG_DS, 122 VCPU_SREG_FS, 123 VCPU_SREG_GS, 124 VCPU_SREG_TR, 125 VCPU_SREG_LDTR, 126 }; 127 128 #include <asm/kvm_emulate.h> 129 130 #define KVM_NR_MEM_OBJS 40 131 132 #define KVM_NR_DB_REGS 4 133 134 #define DR6_BD (1 << 13) 135 #define DR6_BS (1 << 14) 136 #define DR6_FIXED_1 0xffff0ff0 137 #define DR6_VOLATILE 0x0000e00f 138 139 #define DR7_BP_EN_MASK 0x000000ff 140 #define DR7_GE (1 << 9) 141 #define DR7_GD (1 << 13) 142 #define DR7_FIXED_1 0x00000400 143 #define DR7_VOLATILE 0xffff23ff 144 145 /* 146 * We don't want allocation failures within the mmu code, so we preallocate 147 * enough memory for a single page fault in a cache. 148 */ 149 struct kvm_mmu_memory_cache { 150 int nobjs; 151 void *objects[KVM_NR_MEM_OBJS]; 152 }; 153 154 #define NR_PTE_CHAIN_ENTRIES 5 155 156 struct kvm_pte_chain { 157 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES]; 158 struct hlist_node link; 159 }; 160 161 /* 162 * kvm_mmu_page_role, below, is defined as: 163 * 164 * bits 0:3 - total guest paging levels (2-4, or zero for real mode) 165 * bits 4:7 - page table level for this shadow (1-4) 166 * bits 8:9 - page table quadrant for 2-level guests 167 * bit 16 - direct mapping of virtual to physical mapping at gfn 168 * used for real mode and two-dimensional paging 169 * bits 17:19 - common access permissions for all ptes in this shadow page 170 */ 171 union kvm_mmu_page_role { 172 unsigned word; 173 struct { 174 unsigned level:4; 175 unsigned cr4_pae:1; 176 unsigned quadrant:2; 177 unsigned pad_for_nice_hex_output:6; 178 unsigned direct:1; 179 unsigned access:3; 180 unsigned invalid:1; 181 unsigned nxe:1; 182 unsigned cr0_wp:1; 183 }; 184 }; 185 186 struct kvm_mmu_page { 187 struct list_head link; 188 struct hlist_node hash_link; 189 190 /* 191 * The following two entries are used to key the shadow page in the 192 * hash table. 193 */ 194 gfn_t gfn; 195 union kvm_mmu_page_role role; 196 197 u64 *spt; 198 /* hold the gfn of each spte inside spt */ 199 gfn_t *gfns; 200 /* 201 * One bit set per slot which has memory 202 * in this shadow page. 203 */ 204 DECLARE_BITMAP(slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS); 205 bool multimapped; /* More than one parent_pte? */ 206 bool unsync; 207 int root_count; /* Currently serving as active root */ 208 unsigned int unsync_children; 209 union { 210 u64 *parent_pte; /* !multimapped */ 211 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */ 212 }; 213 DECLARE_BITMAP(unsync_child_bitmap, 512); 214 }; 215 216 struct kvm_pv_mmu_op_buffer { 217 void *ptr; 218 unsigned len; 219 unsigned processed; 220 char buf[512] __aligned(sizeof(long)); 221 }; 222 223 struct kvm_pio_request { 224 unsigned long count; 225 int in; 226 int port; 227 int size; 228 }; 229 230 /* 231 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level 232 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu 233 * mode. 234 */ 235 struct kvm_mmu { 236 void (*new_cr3)(struct kvm_vcpu *vcpu); 237 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err); 238 void (*free)(struct kvm_vcpu *vcpu); 239 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access, 240 u32 *error); 241 void (*prefetch_page)(struct kvm_vcpu *vcpu, 242 struct kvm_mmu_page *page); 243 int (*sync_page)(struct kvm_vcpu *vcpu, 244 struct kvm_mmu_page *sp); 245 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva); 246 hpa_t root_hpa; 247 int root_level; 248 int shadow_root_level; 249 union kvm_mmu_page_role base_role; 250 251 u64 *pae_root; 252 u64 rsvd_bits_mask[2][4]; 253 }; 254 255 struct kvm_vcpu_arch { 256 u64 host_tsc; 257 /* 258 * rip and regs accesses must go through 259 * kvm_{register,rip}_{read,write} functions. 260 */ 261 unsigned long regs[NR_VCPU_REGS]; 262 u32 regs_avail; 263 u32 regs_dirty; 264 265 unsigned long cr0; 266 unsigned long cr0_guest_owned_bits; 267 unsigned long cr2; 268 unsigned long cr3; 269 unsigned long cr4; 270 unsigned long cr4_guest_owned_bits; 271 unsigned long cr8; 272 u32 hflags; 273 u64 pdptrs[4]; /* pae */ 274 u64 efer; 275 u64 apic_base; 276 struct kvm_lapic *apic; /* kernel irqchip context */ 277 int32_t apic_arb_prio; 278 int mp_state; 279 int sipi_vector; 280 u64 ia32_misc_enable_msr; 281 bool tpr_access_reporting; 282 283 struct kvm_mmu mmu; 284 /* only needed in kvm_pv_mmu_op() path, but it's hot so 285 * put it here to avoid allocation */ 286 struct kvm_pv_mmu_op_buffer mmu_op_buffer; 287 288 struct kvm_mmu_memory_cache mmu_pte_chain_cache; 289 struct kvm_mmu_memory_cache mmu_rmap_desc_cache; 290 struct kvm_mmu_memory_cache mmu_page_cache; 291 struct kvm_mmu_memory_cache mmu_page_header_cache; 292 293 gfn_t last_pt_write_gfn; 294 int last_pt_write_count; 295 u64 *last_pte_updated; 296 gfn_t last_pte_gfn; 297 298 struct { 299 gfn_t gfn; /* presumed gfn during guest pte update */ 300 pfn_t pfn; /* pfn corresponding to that gfn */ 301 unsigned long mmu_seq; 302 } update_pte; 303 304 struct i387_fxsave_struct host_fx_image; 305 struct i387_fxsave_struct guest_fx_image; 306 307 gva_t mmio_fault_cr2; 308 struct kvm_pio_request pio; 309 void *pio_data; 310 311 u8 event_exit_inst_len; 312 313 struct kvm_queued_exception { 314 bool pending; 315 bool has_error_code; 316 bool reinject; 317 u8 nr; 318 u32 error_code; 319 } exception; 320 321 struct kvm_queued_interrupt { 322 bool pending; 323 bool soft; 324 u8 nr; 325 } interrupt; 326 327 int halt_request; /* real mode on Intel only */ 328 329 int cpuid_nent; 330 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES]; 331 /* emulate context */ 332 333 struct x86_emulate_ctxt emulate_ctxt; 334 335 gpa_t time; 336 struct pvclock_vcpu_time_info hv_clock; 337 unsigned int hv_clock_tsc_khz; 338 unsigned int time_offset; 339 struct page *time_page; 340 341 bool nmi_pending; 342 bool nmi_injected; 343 344 struct mtrr_state_type mtrr_state; 345 u32 pat; 346 347 int switch_db_regs; 348 unsigned long db[KVM_NR_DB_REGS]; 349 unsigned long dr6; 350 unsigned long dr7; 351 unsigned long eff_db[KVM_NR_DB_REGS]; 352 353 u64 mcg_cap; 354 u64 mcg_status; 355 u64 mcg_ctl; 356 u64 *mce_banks; 357 358 /* used for guest single stepping over the given code position */ 359 unsigned long singlestep_rip; 360 361 /* fields used by HYPER-V emulation */ 362 u64 hv_vapic; 363 }; 364 365 struct kvm_mem_alias { 366 gfn_t base_gfn; 367 unsigned long npages; 368 gfn_t target_gfn; 369 #define KVM_ALIAS_INVALID 1UL 370 unsigned long flags; 371 }; 372 373 #define KVM_ARCH_HAS_UNALIAS_INSTANTIATION 374 375 struct kvm_mem_aliases { 376 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS]; 377 int naliases; 378 }; 379 380 struct kvm_arch { 381 struct kvm_mem_aliases *aliases; 382 383 unsigned int n_free_mmu_pages; 384 unsigned int n_requested_mmu_pages; 385 unsigned int n_alloc_mmu_pages; 386 atomic_t invlpg_counter; 387 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES]; 388 /* 389 * Hash table of struct kvm_mmu_page. 390 */ 391 struct list_head active_mmu_pages; 392 struct list_head assigned_dev_head; 393 struct iommu_domain *iommu_domain; 394 int iommu_flags; 395 struct kvm_pic *vpic; 396 struct kvm_ioapic *vioapic; 397 struct kvm_pit *vpit; 398 int vapics_in_nmi_mode; 399 400 unsigned int tss_addr; 401 struct page *apic_access_page; 402 403 gpa_t wall_clock; 404 405 struct page *ept_identity_pagetable; 406 bool ept_identity_pagetable_done; 407 gpa_t ept_identity_map_addr; 408 409 unsigned long irq_sources_bitmap; 410 u64 vm_init_tsc; 411 s64 kvmclock_offset; 412 413 struct kvm_xen_hvm_config xen_hvm_config; 414 415 /* fields used by HYPER-V emulation */ 416 u64 hv_guest_os_id; 417 u64 hv_hypercall; 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 remote_tlb_flush; 430 u32 lpages; 431 }; 432 433 struct kvm_vcpu_stat { 434 u32 pf_fixed; 435 u32 pf_guest; 436 u32 tlb_flush; 437 u32 invlpg; 438 439 u32 exits; 440 u32 io_exits; 441 u32 mmio_exits; 442 u32 signal_exits; 443 u32 irq_window_exits; 444 u32 nmi_window_exits; 445 u32 halt_exits; 446 u32 halt_wakeup; 447 u32 request_irq_exits; 448 u32 irq_exits; 449 u32 host_state_reload; 450 u32 efer_reload; 451 u32 fpu_reload; 452 u32 insn_emulation; 453 u32 insn_emulation_fail; 454 u32 hypercalls; 455 u32 irq_injections; 456 u32 nmi_injections; 457 }; 458 459 struct kvm_x86_ops { 460 int (*cpu_has_kvm_support)(void); /* __init */ 461 int (*disabled_by_bios)(void); /* __init */ 462 int (*hardware_enable)(void *dummy); 463 void (*hardware_disable)(void *dummy); 464 void (*check_processor_compatibility)(void *rtn); 465 int (*hardware_setup)(void); /* __init */ 466 void (*hardware_unsetup)(void); /* __exit */ 467 bool (*cpu_has_accelerated_tpr)(void); 468 void (*cpuid_update)(struct kvm_vcpu *vcpu); 469 470 /* Create, but do not attach this VCPU */ 471 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id); 472 void (*vcpu_free)(struct kvm_vcpu *vcpu); 473 int (*vcpu_reset)(struct kvm_vcpu *vcpu); 474 475 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu); 476 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu); 477 void (*vcpu_put)(struct kvm_vcpu *vcpu); 478 479 void (*set_guest_debug)(struct kvm_vcpu *vcpu, 480 struct kvm_guest_debug *dbg); 481 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata); 482 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 483 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg); 484 void (*get_segment)(struct kvm_vcpu *vcpu, 485 struct kvm_segment *var, int seg); 486 int (*get_cpl)(struct kvm_vcpu *vcpu); 487 void (*set_segment)(struct kvm_vcpu *vcpu, 488 struct kvm_segment *var, int seg); 489 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l); 490 void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu); 491 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu); 492 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0); 493 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 494 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4); 495 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer); 496 void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 497 void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 498 void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 499 void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 500 void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value); 501 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg); 502 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu); 503 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags); 504 void (*fpu_activate)(struct kvm_vcpu *vcpu); 505 void (*fpu_deactivate)(struct kvm_vcpu *vcpu); 506 507 void (*tlb_flush)(struct kvm_vcpu *vcpu); 508 509 void (*run)(struct kvm_vcpu *vcpu); 510 int (*handle_exit)(struct kvm_vcpu *vcpu); 511 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu); 512 void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 513 u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 514 void (*patch_hypercall)(struct kvm_vcpu *vcpu, 515 unsigned char *hypercall_addr); 516 void (*set_irq)(struct kvm_vcpu *vcpu); 517 void (*set_nmi)(struct kvm_vcpu *vcpu); 518 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr, 519 bool has_error_code, u32 error_code, 520 bool reinject); 521 int (*interrupt_allowed)(struct kvm_vcpu *vcpu); 522 int (*nmi_allowed)(struct kvm_vcpu *vcpu); 523 bool (*get_nmi_mask)(struct kvm_vcpu *vcpu); 524 void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked); 525 void (*enable_nmi_window)(struct kvm_vcpu *vcpu); 526 void (*enable_irq_window)(struct kvm_vcpu *vcpu); 527 void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr); 528 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr); 529 int (*get_tdp_level)(void); 530 u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio); 531 int (*get_lpage_level)(void); 532 bool (*rdtscp_supported)(void); 533 534 void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry); 535 536 const struct trace_print_flags *exit_reasons_str; 537 }; 538 539 extern struct kvm_x86_ops *kvm_x86_ops; 540 541 int kvm_mmu_module_init(void); 542 void kvm_mmu_module_exit(void); 543 544 void kvm_mmu_destroy(struct kvm_vcpu *vcpu); 545 int kvm_mmu_create(struct kvm_vcpu *vcpu); 546 int kvm_mmu_setup(struct kvm_vcpu *vcpu); 547 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte); 548 void kvm_mmu_set_base_ptes(u64 base_pte); 549 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask, 550 u64 dirty_mask, u64 nx_mask, u64 x_mask); 551 552 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu); 553 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot); 554 void kvm_mmu_zap_all(struct kvm *kvm); 555 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm); 556 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages); 557 558 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3); 559 560 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, 561 const void *val, int bytes); 562 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes, 563 gpa_t addr, unsigned long *ret); 564 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn); 565 566 extern bool tdp_enabled; 567 568 enum emulation_result { 569 EMULATE_DONE, /* no further processing */ 570 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */ 571 EMULATE_FAIL, /* can't emulate this instruction */ 572 }; 573 574 #define EMULTYPE_NO_DECODE (1 << 0) 575 #define EMULTYPE_TRAP_UD (1 << 1) 576 #define EMULTYPE_SKIP (1 << 2) 577 int emulate_instruction(struct kvm_vcpu *vcpu, 578 unsigned long cr2, u16 error_code, int emulation_type); 579 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context); 580 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address); 581 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address); 582 583 void kvm_enable_efer_bits(u64); 584 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data); 585 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 586 587 struct x86_emulate_ctxt; 588 589 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port); 590 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu); 591 int kvm_emulate_halt(struct kvm_vcpu *vcpu); 592 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address); 593 int emulate_clts(struct kvm_vcpu *vcpu); 594 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, 595 unsigned long *dest); 596 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, 597 unsigned long value); 598 599 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); 600 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg); 601 602 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason, 603 bool has_error_code, u32 error_code); 604 605 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0); 606 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3); 607 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); 608 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8); 609 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val); 610 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val); 611 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu); 612 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw); 613 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l); 614 615 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata); 616 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data); 617 618 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu); 619 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); 620 621 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr); 622 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 623 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr); 624 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 625 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2, 626 u32 error_code); 627 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl); 628 629 int kvm_pic_set_irq(void *opaque, int irq, int level); 630 631 void kvm_inject_nmi(struct kvm_vcpu *vcpu); 632 633 void fx_init(struct kvm_vcpu *vcpu); 634 635 int emulator_write_emulated(unsigned long addr, 636 const void *val, 637 unsigned int bytes, 638 struct kvm_vcpu *vcpu); 639 640 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu); 641 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, 642 const u8 *new, int bytes, 643 bool guest_initiated); 644 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva); 645 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu); 646 int kvm_mmu_load(struct kvm_vcpu *vcpu); 647 void kvm_mmu_unload(struct kvm_vcpu *vcpu); 648 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu); 649 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error); 650 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error); 651 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error); 652 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error); 653 654 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu); 655 656 int kvm_fix_hypercall(struct kvm_vcpu *vcpu); 657 658 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code); 659 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva); 660 661 void kvm_enable_tdp(void); 662 void kvm_disable_tdp(void); 663 664 int complete_pio(struct kvm_vcpu *vcpu); 665 bool kvm_check_iopl(struct kvm_vcpu *vcpu); 666 667 struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn); 668 669 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page) 670 { 671 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT); 672 673 return (struct kvm_mmu_page *)page_private(page); 674 } 675 676 static inline u16 kvm_read_fs(void) 677 { 678 u16 seg; 679 asm("mov %%fs, %0" : "=g"(seg)); 680 return seg; 681 } 682 683 static inline u16 kvm_read_gs(void) 684 { 685 u16 seg; 686 asm("mov %%gs, %0" : "=g"(seg)); 687 return seg; 688 } 689 690 static inline u16 kvm_read_ldt(void) 691 { 692 u16 ldt; 693 asm("sldt %0" : "=g"(ldt)); 694 return ldt; 695 } 696 697 static inline void kvm_load_fs(u16 sel) 698 { 699 asm("mov %0, %%fs" : : "rm"(sel)); 700 } 701 702 static inline void kvm_load_gs(u16 sel) 703 { 704 asm("mov %0, %%gs" : : "rm"(sel)); 705 } 706 707 static inline void kvm_load_ldt(u16 sel) 708 { 709 asm("lldt %0" : : "rm"(sel)); 710 } 711 712 #ifdef CONFIG_X86_64 713 static inline unsigned long read_msr(unsigned long msr) 714 { 715 u64 value; 716 717 rdmsrl(msr, value); 718 return value; 719 } 720 #endif 721 722 static inline void kvm_fx_save(struct i387_fxsave_struct *image) 723 { 724 asm("fxsave (%0)":: "r" (image)); 725 } 726 727 static inline void kvm_fx_restore(struct i387_fxsave_struct *image) 728 { 729 asm("fxrstor (%0)":: "r" (image)); 730 } 731 732 static inline void kvm_fx_finit(void) 733 { 734 asm("finit"); 735 } 736 737 static inline u32 get_rdx_init_val(void) 738 { 739 return 0x600; /* P6 family */ 740 } 741 742 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code) 743 { 744 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code); 745 } 746 747 #define TSS_IOPB_BASE_OFFSET 0x66 748 #define TSS_BASE_SIZE 0x68 749 #define TSS_IOPB_SIZE (65536 / 8) 750 #define TSS_REDIRECTION_SIZE (256 / 8) 751 #define RMODE_TSS_SIZE \ 752 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1) 753 754 enum { 755 TASK_SWITCH_CALL = 0, 756 TASK_SWITCH_IRET = 1, 757 TASK_SWITCH_JMP = 2, 758 TASK_SWITCH_GATE = 3, 759 }; 760 761 #define HF_GIF_MASK (1 << 0) 762 #define HF_HIF_MASK (1 << 1) 763 #define HF_VINTR_MASK (1 << 2) 764 #define HF_NMI_MASK (1 << 3) 765 #define HF_IRET_MASK (1 << 4) 766 767 /* 768 * Hardware virtualization extension instructions may fault if a 769 * reboot turns off virtualization while processes are running. 770 * Trap the fault and ignore the instruction if that happens. 771 */ 772 asmlinkage void kvm_handle_fault_on_reboot(void); 773 774 #define __kvm_handle_fault_on_reboot(insn) \ 775 "666: " insn "\n\t" \ 776 ".pushsection .fixup, \"ax\" \n" \ 777 "667: \n\t" \ 778 __ASM_SIZE(push) " $666b \n\t" \ 779 "jmp kvm_handle_fault_on_reboot \n\t" \ 780 ".popsection \n\t" \ 781 ".pushsection __ex_table, \"a\" \n\t" \ 782 _ASM_PTR " 666b, 667b \n\t" \ 783 ".popsection" 784 785 #define KVM_ARCH_WANT_MMU_NOTIFIER 786 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 787 int kvm_age_hva(struct kvm *kvm, unsigned long hva); 788 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 789 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu); 790 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu); 791 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu); 792 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 793 794 void kvm_define_shared_msr(unsigned index, u32 msr); 795 void kvm_set_shared_msr(unsigned index, u64 val, u64 mask); 796 797 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip); 798 799 #endif /* _ASM_X86_KVM_HOST_H */ 800