1 /* 2 * Kernel-based Virtual Machine driver for Linux 3 * 4 * This header defines architecture specific interfaces, x86 version 5 * 6 * This work is licensed under the terms of the GNU GPL, version 2. See 7 * the COPYING file in the top-level directory. 8 * 9 */ 10 11 #ifndef _ASM_X86_KVM_HOST_H 12 #define _ASM_X86_KVM_HOST_H 13 14 #include <linux/types.h> 15 #include <linux/mm.h> 16 #include <linux/mmu_notifier.h> 17 #include <linux/tracepoint.h> 18 #include <linux/cpumask.h> 19 20 #include <linux/kvm.h> 21 #include <linux/kvm_para.h> 22 #include <linux/kvm_types.h> 23 24 #include <asm/pvclock-abi.h> 25 #include <asm/desc.h> 26 #include <asm/mtrr.h> 27 #include <asm/msr-index.h> 28 29 #define KVM_MAX_VCPUS 64 30 #define KVM_MEMORY_SLOTS 32 31 /* memory slots that does not exposed to userspace */ 32 #define KVM_PRIVATE_MEM_SLOTS 4 33 34 #define KVM_PIO_PAGE_OFFSET 1 35 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2 36 37 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1) 38 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD)) 39 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \ 40 0xFFFFFF0000000000ULL) 41 42 #define INVALID_PAGE (~(hpa_t)0) 43 #define VALID_PAGE(x) ((x) != INVALID_PAGE) 44 45 #define UNMAPPED_GVA (~(gpa_t)0) 46 47 /* KVM Hugepage definitions for x86 */ 48 #define KVM_NR_PAGE_SIZES 3 49 #define KVM_HPAGE_GFN_SHIFT(x) (((x) - 1) * 9) 50 #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + KVM_HPAGE_GFN_SHIFT(x)) 51 #define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x)) 52 #define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1)) 53 #define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE) 54 55 #define DE_VECTOR 0 56 #define DB_VECTOR 1 57 #define BP_VECTOR 3 58 #define OF_VECTOR 4 59 #define BR_VECTOR 5 60 #define UD_VECTOR 6 61 #define NM_VECTOR 7 62 #define DF_VECTOR 8 63 #define TS_VECTOR 10 64 #define NP_VECTOR 11 65 #define SS_VECTOR 12 66 #define GP_VECTOR 13 67 #define PF_VECTOR 14 68 #define MF_VECTOR 16 69 #define MC_VECTOR 18 70 71 #define SELECTOR_TI_MASK (1 << 2) 72 #define SELECTOR_RPL_MASK 0x03 73 74 #define IOPL_SHIFT 12 75 76 #define KVM_PERMILLE_MMU_PAGES 20 77 #define KVM_MIN_ALLOC_MMU_PAGES 64 78 #define KVM_MMU_HASH_SHIFT 10 79 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT) 80 #define KVM_MIN_FREE_MMU_PAGES 5 81 #define KVM_REFILL_PAGES 25 82 #define KVM_MAX_CPUID_ENTRIES 80 83 #define KVM_NR_FIXED_MTRR_REGION 88 84 #define KVM_NR_VAR_MTRR 8 85 86 #define ASYNC_PF_PER_VCPU 64 87 88 extern spinlock_t kvm_lock; 89 extern struct list_head vm_list; 90 91 struct kvm_vcpu; 92 struct kvm; 93 struct kvm_async_pf; 94 95 enum kvm_reg { 96 VCPU_REGS_RAX = 0, 97 VCPU_REGS_RCX = 1, 98 VCPU_REGS_RDX = 2, 99 VCPU_REGS_RBX = 3, 100 VCPU_REGS_RSP = 4, 101 VCPU_REGS_RBP = 5, 102 VCPU_REGS_RSI = 6, 103 VCPU_REGS_RDI = 7, 104 #ifdef CONFIG_X86_64 105 VCPU_REGS_R8 = 8, 106 VCPU_REGS_R9 = 9, 107 VCPU_REGS_R10 = 10, 108 VCPU_REGS_R11 = 11, 109 VCPU_REGS_R12 = 12, 110 VCPU_REGS_R13 = 13, 111 VCPU_REGS_R14 = 14, 112 VCPU_REGS_R15 = 15, 113 #endif 114 VCPU_REGS_RIP, 115 NR_VCPU_REGS 116 }; 117 118 enum kvm_reg_ex { 119 VCPU_EXREG_PDPTR = NR_VCPU_REGS, 120 VCPU_EXREG_CR3, 121 }; 122 123 enum { 124 VCPU_SREG_ES, 125 VCPU_SREG_CS, 126 VCPU_SREG_SS, 127 VCPU_SREG_DS, 128 VCPU_SREG_FS, 129 VCPU_SREG_GS, 130 VCPU_SREG_TR, 131 VCPU_SREG_LDTR, 132 }; 133 134 #include <asm/kvm_emulate.h> 135 136 #define KVM_NR_MEM_OBJS 40 137 138 #define KVM_NR_DB_REGS 4 139 140 #define DR6_BD (1 << 13) 141 #define DR6_BS (1 << 14) 142 #define DR6_FIXED_1 0xffff0ff0 143 #define DR6_VOLATILE 0x0000e00f 144 145 #define DR7_BP_EN_MASK 0x000000ff 146 #define DR7_GE (1 << 9) 147 #define DR7_GD (1 << 13) 148 #define DR7_FIXED_1 0x00000400 149 #define DR7_VOLATILE 0xffff23ff 150 151 /* 152 * We don't want allocation failures within the mmu code, so we preallocate 153 * enough memory for a single page fault in a cache. 154 */ 155 struct kvm_mmu_memory_cache { 156 int nobjs; 157 void *objects[KVM_NR_MEM_OBJS]; 158 }; 159 160 #define NR_PTE_CHAIN_ENTRIES 5 161 162 struct kvm_pte_chain { 163 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES]; 164 struct hlist_node link; 165 }; 166 167 /* 168 * kvm_mmu_page_role, below, is defined as: 169 * 170 * bits 0:3 - total guest paging levels (2-4, or zero for real mode) 171 * bits 4:7 - page table level for this shadow (1-4) 172 * bits 8:9 - page table quadrant for 2-level guests 173 * bit 16 - direct mapping of virtual to physical mapping at gfn 174 * used for real mode and two-dimensional paging 175 * bits 17:19 - common access permissions for all ptes in this shadow page 176 */ 177 union kvm_mmu_page_role { 178 unsigned word; 179 struct { 180 unsigned level:4; 181 unsigned cr4_pae:1; 182 unsigned quadrant:2; 183 unsigned pad_for_nice_hex_output:6; 184 unsigned direct:1; 185 unsigned access:3; 186 unsigned invalid:1; 187 unsigned nxe:1; 188 unsigned cr0_wp:1; 189 }; 190 }; 191 192 struct kvm_mmu_page { 193 struct list_head link; 194 struct hlist_node hash_link; 195 196 /* 197 * The following two entries are used to key the shadow page in the 198 * hash table. 199 */ 200 gfn_t gfn; 201 union kvm_mmu_page_role role; 202 203 u64 *spt; 204 /* hold the gfn of each spte inside spt */ 205 gfn_t *gfns; 206 /* 207 * One bit set per slot which has memory 208 * in this shadow page. 209 */ 210 DECLARE_BITMAP(slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS); 211 bool multimapped; /* More than one parent_pte? */ 212 bool unsync; 213 int root_count; /* Currently serving as active root */ 214 unsigned int unsync_children; 215 union { 216 u64 *parent_pte; /* !multimapped */ 217 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */ 218 }; 219 DECLARE_BITMAP(unsync_child_bitmap, 512); 220 }; 221 222 struct kvm_pv_mmu_op_buffer { 223 void *ptr; 224 unsigned len; 225 unsigned processed; 226 char buf[512] __aligned(sizeof(long)); 227 }; 228 229 struct kvm_pio_request { 230 unsigned long count; 231 int in; 232 int port; 233 int size; 234 }; 235 236 /* 237 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level 238 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu 239 * mode. 240 */ 241 struct kvm_mmu { 242 void (*new_cr3)(struct kvm_vcpu *vcpu); 243 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root); 244 unsigned long (*get_cr3)(struct kvm_vcpu *vcpu); 245 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err, 246 bool prefault); 247 void (*inject_page_fault)(struct kvm_vcpu *vcpu, 248 struct x86_exception *fault); 249 void (*free)(struct kvm_vcpu *vcpu); 250 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access, 251 struct x86_exception *exception); 252 gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access); 253 void (*prefetch_page)(struct kvm_vcpu *vcpu, 254 struct kvm_mmu_page *page); 255 int (*sync_page)(struct kvm_vcpu *vcpu, 256 struct kvm_mmu_page *sp); 257 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva); 258 hpa_t root_hpa; 259 int root_level; 260 int shadow_root_level; 261 union kvm_mmu_page_role base_role; 262 bool direct_map; 263 264 u64 *pae_root; 265 u64 *lm_root; 266 u64 rsvd_bits_mask[2][4]; 267 268 bool nx; 269 270 u64 pdptrs[4]; /* pae */ 271 }; 272 273 struct kvm_vcpu_arch { 274 /* 275 * rip and regs accesses must go through 276 * kvm_{register,rip}_{read,write} functions. 277 */ 278 unsigned long regs[NR_VCPU_REGS]; 279 u32 regs_avail; 280 u32 regs_dirty; 281 282 unsigned long cr0; 283 unsigned long cr0_guest_owned_bits; 284 unsigned long cr2; 285 unsigned long cr3; 286 unsigned long cr4; 287 unsigned long cr4_guest_owned_bits; 288 unsigned long cr8; 289 u32 hflags; 290 u64 efer; 291 u64 apic_base; 292 struct kvm_lapic *apic; /* kernel irqchip context */ 293 int32_t apic_arb_prio; 294 int mp_state; 295 int sipi_vector; 296 u64 ia32_misc_enable_msr; 297 bool tpr_access_reporting; 298 299 /* 300 * Paging state of the vcpu 301 * 302 * If the vcpu runs in guest mode with two level paging this still saves 303 * the paging mode of the l1 guest. This context is always used to 304 * handle faults. 305 */ 306 struct kvm_mmu mmu; 307 308 /* 309 * Paging state of an L2 guest (used for nested npt) 310 * 311 * This context will save all necessary information to walk page tables 312 * of the an L2 guest. This context is only initialized for page table 313 * walking and not for faulting since we never handle l2 page faults on 314 * the host. 315 */ 316 struct kvm_mmu nested_mmu; 317 318 /* 319 * Pointer to the mmu context currently used for 320 * gva_to_gpa translations. 321 */ 322 struct kvm_mmu *walk_mmu; 323 324 /* only needed in kvm_pv_mmu_op() path, but it's hot so 325 * put it here to avoid allocation */ 326 struct kvm_pv_mmu_op_buffer mmu_op_buffer; 327 328 struct kvm_mmu_memory_cache mmu_pte_chain_cache; 329 struct kvm_mmu_memory_cache mmu_rmap_desc_cache; 330 struct kvm_mmu_memory_cache mmu_page_cache; 331 struct kvm_mmu_memory_cache mmu_page_header_cache; 332 333 gfn_t last_pt_write_gfn; 334 int last_pt_write_count; 335 u64 *last_pte_updated; 336 gfn_t last_pte_gfn; 337 338 struct { 339 gfn_t gfn; /* presumed gfn during guest pte update */ 340 pfn_t pfn; /* pfn corresponding to that gfn */ 341 unsigned long mmu_seq; 342 } update_pte; 343 344 struct fpu guest_fpu; 345 u64 xcr0; 346 347 gva_t mmio_fault_cr2; 348 struct kvm_pio_request pio; 349 void *pio_data; 350 351 u8 event_exit_inst_len; 352 353 struct kvm_queued_exception { 354 bool pending; 355 bool has_error_code; 356 bool reinject; 357 u8 nr; 358 u32 error_code; 359 } exception; 360 361 struct kvm_queued_interrupt { 362 bool pending; 363 bool soft; 364 u8 nr; 365 } interrupt; 366 367 int halt_request; /* real mode on Intel only */ 368 369 int cpuid_nent; 370 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES]; 371 /* emulate context */ 372 373 struct x86_emulate_ctxt emulate_ctxt; 374 375 gpa_t time; 376 struct pvclock_vcpu_time_info hv_clock; 377 unsigned int hw_tsc_khz; 378 unsigned int time_offset; 379 struct page *time_page; 380 u64 last_host_tsc; 381 u64 last_guest_tsc; 382 u64 last_kernel_ns; 383 u64 last_tsc_nsec; 384 u64 last_tsc_write; 385 bool tsc_catchup; 386 387 bool nmi_pending; 388 bool nmi_injected; 389 390 struct mtrr_state_type mtrr_state; 391 u32 pat; 392 393 int switch_db_regs; 394 unsigned long db[KVM_NR_DB_REGS]; 395 unsigned long dr6; 396 unsigned long dr7; 397 unsigned long eff_db[KVM_NR_DB_REGS]; 398 399 u64 mcg_cap; 400 u64 mcg_status; 401 u64 mcg_ctl; 402 u64 *mce_banks; 403 404 /* used for guest single stepping over the given code position */ 405 unsigned long singlestep_rip; 406 407 /* fields used by HYPER-V emulation */ 408 u64 hv_vapic; 409 410 cpumask_var_t wbinvd_dirty_mask; 411 412 struct { 413 bool halted; 414 gfn_t gfns[roundup_pow_of_two(ASYNC_PF_PER_VCPU)]; 415 struct gfn_to_hva_cache data; 416 u64 msr_val; 417 u32 id; 418 bool send_user_only; 419 } apf; 420 }; 421 422 struct kvm_arch { 423 unsigned int n_used_mmu_pages; 424 unsigned int n_requested_mmu_pages; 425 unsigned int n_max_mmu_pages; 426 atomic_t invlpg_counter; 427 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES]; 428 /* 429 * Hash table of struct kvm_mmu_page. 430 */ 431 struct list_head active_mmu_pages; 432 struct list_head assigned_dev_head; 433 struct iommu_domain *iommu_domain; 434 int iommu_flags; 435 struct kvm_pic *vpic; 436 struct kvm_ioapic *vioapic; 437 struct kvm_pit *vpit; 438 int vapics_in_nmi_mode; 439 440 unsigned int tss_addr; 441 struct page *apic_access_page; 442 443 gpa_t wall_clock; 444 445 struct page *ept_identity_pagetable; 446 bool ept_identity_pagetable_done; 447 gpa_t ept_identity_map_addr; 448 449 unsigned long irq_sources_bitmap; 450 s64 kvmclock_offset; 451 spinlock_t tsc_write_lock; 452 u64 last_tsc_nsec; 453 u64 last_tsc_offset; 454 u64 last_tsc_write; 455 u32 virtual_tsc_khz; 456 u32 virtual_tsc_mult; 457 s8 virtual_tsc_shift; 458 459 struct kvm_xen_hvm_config xen_hvm_config; 460 461 /* fields used by HYPER-V emulation */ 462 u64 hv_guest_os_id; 463 u64 hv_hypercall; 464 465 #ifdef CONFIG_KVM_MMU_AUDIT 466 int audit_point; 467 #endif 468 }; 469 470 struct kvm_vm_stat { 471 u32 mmu_shadow_zapped; 472 u32 mmu_pte_write; 473 u32 mmu_pte_updated; 474 u32 mmu_pde_zapped; 475 u32 mmu_flooded; 476 u32 mmu_recycled; 477 u32 mmu_cache_miss; 478 u32 mmu_unsync; 479 u32 remote_tlb_flush; 480 u32 lpages; 481 }; 482 483 struct kvm_vcpu_stat { 484 u32 pf_fixed; 485 u32 pf_guest; 486 u32 tlb_flush; 487 u32 invlpg; 488 489 u32 exits; 490 u32 io_exits; 491 u32 mmio_exits; 492 u32 signal_exits; 493 u32 irq_window_exits; 494 u32 nmi_window_exits; 495 u32 halt_exits; 496 u32 halt_wakeup; 497 u32 request_irq_exits; 498 u32 irq_exits; 499 u32 host_state_reload; 500 u32 efer_reload; 501 u32 fpu_reload; 502 u32 insn_emulation; 503 u32 insn_emulation_fail; 504 u32 hypercalls; 505 u32 irq_injections; 506 u32 nmi_injections; 507 }; 508 509 struct kvm_x86_ops { 510 int (*cpu_has_kvm_support)(void); /* __init */ 511 int (*disabled_by_bios)(void); /* __init */ 512 int (*hardware_enable)(void *dummy); 513 void (*hardware_disable)(void *dummy); 514 void (*check_processor_compatibility)(void *rtn); 515 int (*hardware_setup)(void); /* __init */ 516 void (*hardware_unsetup)(void); /* __exit */ 517 bool (*cpu_has_accelerated_tpr)(void); 518 void (*cpuid_update)(struct kvm_vcpu *vcpu); 519 520 /* Create, but do not attach this VCPU */ 521 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id); 522 void (*vcpu_free)(struct kvm_vcpu *vcpu); 523 int (*vcpu_reset)(struct kvm_vcpu *vcpu); 524 525 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu); 526 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu); 527 void (*vcpu_put)(struct kvm_vcpu *vcpu); 528 529 void (*set_guest_debug)(struct kvm_vcpu *vcpu, 530 struct kvm_guest_debug *dbg); 531 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata); 532 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 533 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg); 534 void (*get_segment)(struct kvm_vcpu *vcpu, 535 struct kvm_segment *var, int seg); 536 int (*get_cpl)(struct kvm_vcpu *vcpu); 537 void (*set_segment)(struct kvm_vcpu *vcpu, 538 struct kvm_segment *var, int seg); 539 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l); 540 void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu); 541 void (*decache_cr3)(struct kvm_vcpu *vcpu); 542 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu); 543 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0); 544 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 545 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4); 546 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer); 547 void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 548 void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 549 void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 550 void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 551 void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value); 552 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg); 553 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu); 554 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags); 555 void (*fpu_activate)(struct kvm_vcpu *vcpu); 556 void (*fpu_deactivate)(struct kvm_vcpu *vcpu); 557 558 void (*tlb_flush)(struct kvm_vcpu *vcpu); 559 560 void (*run)(struct kvm_vcpu *vcpu); 561 int (*handle_exit)(struct kvm_vcpu *vcpu); 562 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu); 563 void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 564 u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 565 void (*patch_hypercall)(struct kvm_vcpu *vcpu, 566 unsigned char *hypercall_addr); 567 void (*set_irq)(struct kvm_vcpu *vcpu); 568 void (*set_nmi)(struct kvm_vcpu *vcpu); 569 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr, 570 bool has_error_code, u32 error_code, 571 bool reinject); 572 void (*cancel_injection)(struct kvm_vcpu *vcpu); 573 int (*interrupt_allowed)(struct kvm_vcpu *vcpu); 574 int (*nmi_allowed)(struct kvm_vcpu *vcpu); 575 bool (*get_nmi_mask)(struct kvm_vcpu *vcpu); 576 void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked); 577 void (*enable_nmi_window)(struct kvm_vcpu *vcpu); 578 void (*enable_irq_window)(struct kvm_vcpu *vcpu); 579 void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr); 580 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr); 581 int (*get_tdp_level)(void); 582 u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio); 583 int (*get_lpage_level)(void); 584 bool (*rdtscp_supported)(void); 585 void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment); 586 587 void (*set_tdp_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 588 589 void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry); 590 591 bool (*has_wbinvd_exit)(void); 592 593 void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset); 594 595 void (*get_exit_info)(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2); 596 const struct trace_print_flags *exit_reasons_str; 597 }; 598 599 struct kvm_arch_async_pf { 600 u32 token; 601 gfn_t gfn; 602 unsigned long cr3; 603 bool direct_map; 604 }; 605 606 extern struct kvm_x86_ops *kvm_x86_ops; 607 608 int kvm_mmu_module_init(void); 609 void kvm_mmu_module_exit(void); 610 611 void kvm_mmu_destroy(struct kvm_vcpu *vcpu); 612 int kvm_mmu_create(struct kvm_vcpu *vcpu); 613 int kvm_mmu_setup(struct kvm_vcpu *vcpu); 614 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte); 615 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask, 616 u64 dirty_mask, u64 nx_mask, u64 x_mask); 617 618 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu); 619 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot); 620 void kvm_mmu_zap_all(struct kvm *kvm); 621 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm); 622 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages); 623 624 int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3); 625 626 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, 627 const void *val, int bytes); 628 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes, 629 gpa_t addr, unsigned long *ret); 630 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn); 631 632 extern bool tdp_enabled; 633 634 enum emulation_result { 635 EMULATE_DONE, /* no further processing */ 636 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */ 637 EMULATE_FAIL, /* can't emulate this instruction */ 638 }; 639 640 #define EMULTYPE_NO_DECODE (1 << 0) 641 #define EMULTYPE_TRAP_UD (1 << 1) 642 #define EMULTYPE_SKIP (1 << 2) 643 int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2, 644 int emulation_type, void *insn, int insn_len); 645 646 static inline int emulate_instruction(struct kvm_vcpu *vcpu, 647 int emulation_type) 648 { 649 return x86_emulate_instruction(vcpu, 0, emulation_type, NULL, 0); 650 } 651 652 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address); 653 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address); 654 655 void kvm_enable_efer_bits(u64); 656 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data); 657 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 658 659 struct x86_emulate_ctxt; 660 661 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port); 662 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu); 663 int kvm_emulate_halt(struct kvm_vcpu *vcpu); 664 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address); 665 int emulate_clts(struct kvm_vcpu *vcpu); 666 int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu); 667 668 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); 669 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg); 670 671 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason, 672 bool has_error_code, u32 error_code); 673 674 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0); 675 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3); 676 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); 677 int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8); 678 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val); 679 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val); 680 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu); 681 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw); 682 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l); 683 int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr); 684 685 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata); 686 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data); 687 688 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu); 689 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); 690 691 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr); 692 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 693 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr); 694 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 695 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault); 696 int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, 697 gfn_t gfn, void *data, int offset, int len, 698 u32 access); 699 void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault); 700 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl); 701 702 int kvm_pic_set_irq(void *opaque, int irq, int level); 703 704 void kvm_inject_nmi(struct kvm_vcpu *vcpu); 705 706 int fx_init(struct kvm_vcpu *vcpu); 707 708 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu); 709 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, 710 const u8 *new, int bytes, 711 bool guest_initiated); 712 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva); 713 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu); 714 int kvm_mmu_load(struct kvm_vcpu *vcpu); 715 void kvm_mmu_unload(struct kvm_vcpu *vcpu); 716 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu); 717 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, 718 struct x86_exception *exception); 719 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, 720 struct x86_exception *exception); 721 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, 722 struct x86_exception *exception); 723 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, 724 struct x86_exception *exception); 725 726 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu); 727 728 int kvm_fix_hypercall(struct kvm_vcpu *vcpu); 729 730 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code, 731 void *insn, int insn_len); 732 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva); 733 734 void kvm_enable_tdp(void); 735 void kvm_disable_tdp(void); 736 737 int complete_pio(struct kvm_vcpu *vcpu); 738 bool kvm_check_iopl(struct kvm_vcpu *vcpu); 739 740 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page) 741 { 742 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT); 743 744 return (struct kvm_mmu_page *)page_private(page); 745 } 746 747 static inline u16 kvm_read_ldt(void) 748 { 749 u16 ldt; 750 asm("sldt %0" : "=g"(ldt)); 751 return ldt; 752 } 753 754 static inline void kvm_load_ldt(u16 sel) 755 { 756 asm("lldt %0" : : "rm"(sel)); 757 } 758 759 #ifdef CONFIG_X86_64 760 static inline unsigned long read_msr(unsigned long msr) 761 { 762 u64 value; 763 764 rdmsrl(msr, value); 765 return value; 766 } 767 #endif 768 769 static inline u32 get_rdx_init_val(void) 770 { 771 return 0x600; /* P6 family */ 772 } 773 774 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code) 775 { 776 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code); 777 } 778 779 #define TSS_IOPB_BASE_OFFSET 0x66 780 #define TSS_BASE_SIZE 0x68 781 #define TSS_IOPB_SIZE (65536 / 8) 782 #define TSS_REDIRECTION_SIZE (256 / 8) 783 #define RMODE_TSS_SIZE \ 784 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1) 785 786 enum { 787 TASK_SWITCH_CALL = 0, 788 TASK_SWITCH_IRET = 1, 789 TASK_SWITCH_JMP = 2, 790 TASK_SWITCH_GATE = 3, 791 }; 792 793 #define HF_GIF_MASK (1 << 0) 794 #define HF_HIF_MASK (1 << 1) 795 #define HF_VINTR_MASK (1 << 2) 796 #define HF_NMI_MASK (1 << 3) 797 #define HF_IRET_MASK (1 << 4) 798 #define HF_GUEST_MASK (1 << 5) /* VCPU is in guest-mode */ 799 800 /* 801 * Hardware virtualization extension instructions may fault if a 802 * reboot turns off virtualization while processes are running. 803 * Trap the fault and ignore the instruction if that happens. 804 */ 805 asmlinkage void kvm_spurious_fault(void); 806 extern bool kvm_rebooting; 807 808 #define __kvm_handle_fault_on_reboot(insn) \ 809 "666: " insn "\n\t" \ 810 "668: \n\t" \ 811 ".pushsection .fixup, \"ax\" \n" \ 812 "667: \n\t" \ 813 "cmpb $0, kvm_rebooting \n\t" \ 814 "jne 668b \n\t" \ 815 __ASM_SIZE(push) " $666b \n\t" \ 816 "call kvm_spurious_fault \n\t" \ 817 ".popsection \n\t" \ 818 ".pushsection __ex_table, \"a\" \n\t" \ 819 _ASM_PTR " 666b, 667b \n\t" \ 820 ".popsection" 821 822 #define KVM_ARCH_WANT_MMU_NOTIFIER 823 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 824 int kvm_age_hva(struct kvm *kvm, unsigned long hva); 825 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); 826 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 827 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu); 828 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu); 829 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu); 830 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 831 832 void kvm_define_shared_msr(unsigned index, u32 msr); 833 void kvm_set_shared_msr(unsigned index, u64 val, u64 mask); 834 835 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip); 836 837 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, 838 struct kvm_async_pf *work); 839 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, 840 struct kvm_async_pf *work); 841 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, 842 struct kvm_async_pf *work); 843 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu); 844 extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn); 845 846 void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err); 847 848 #endif /* _ASM_X86_KVM_HOST_H */ 849