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 raw_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 void (*update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, 259 u64 *spte, const void *pte, unsigned long mmu_seq); 260 hpa_t root_hpa; 261 int root_level; 262 int shadow_root_level; 263 union kvm_mmu_page_role base_role; 264 bool direct_map; 265 266 u64 *pae_root; 267 u64 *lm_root; 268 u64 rsvd_bits_mask[2][4]; 269 270 bool nx; 271 272 u64 pdptrs[4]; /* pae */ 273 }; 274 275 struct kvm_vcpu_arch { 276 /* 277 * rip and regs accesses must go through 278 * kvm_{register,rip}_{read,write} functions. 279 */ 280 unsigned long regs[NR_VCPU_REGS]; 281 u32 regs_avail; 282 u32 regs_dirty; 283 284 unsigned long cr0; 285 unsigned long cr0_guest_owned_bits; 286 unsigned long cr2; 287 unsigned long cr3; 288 unsigned long cr4; 289 unsigned long cr4_guest_owned_bits; 290 unsigned long cr8; 291 u32 hflags; 292 u64 efer; 293 u64 apic_base; 294 struct kvm_lapic *apic; /* kernel irqchip context */ 295 int32_t apic_arb_prio; 296 int mp_state; 297 int sipi_vector; 298 u64 ia32_misc_enable_msr; 299 bool tpr_access_reporting; 300 301 /* 302 * Paging state of the vcpu 303 * 304 * If the vcpu runs in guest mode with two level paging this still saves 305 * the paging mode of the l1 guest. This context is always used to 306 * handle faults. 307 */ 308 struct kvm_mmu mmu; 309 310 /* 311 * Paging state of an L2 guest (used for nested npt) 312 * 313 * This context will save all necessary information to walk page tables 314 * of the an L2 guest. This context is only initialized for page table 315 * walking and not for faulting since we never handle l2 page faults on 316 * the host. 317 */ 318 struct kvm_mmu nested_mmu; 319 320 /* 321 * Pointer to the mmu context currently used for 322 * gva_to_gpa translations. 323 */ 324 struct kvm_mmu *walk_mmu; 325 326 /* only needed in kvm_pv_mmu_op() path, but it's hot so 327 * put it here to avoid allocation */ 328 struct kvm_pv_mmu_op_buffer mmu_op_buffer; 329 330 struct kvm_mmu_memory_cache mmu_pte_chain_cache; 331 struct kvm_mmu_memory_cache mmu_rmap_desc_cache; 332 struct kvm_mmu_memory_cache mmu_page_cache; 333 struct kvm_mmu_memory_cache mmu_page_header_cache; 334 335 gfn_t last_pt_write_gfn; 336 int last_pt_write_count; 337 u64 *last_pte_updated; 338 gfn_t last_pte_gfn; 339 340 struct fpu guest_fpu; 341 u64 xcr0; 342 343 gva_t mmio_fault_cr2; 344 struct kvm_pio_request pio; 345 void *pio_data; 346 347 u8 event_exit_inst_len; 348 349 struct kvm_queued_exception { 350 bool pending; 351 bool has_error_code; 352 bool reinject; 353 u8 nr; 354 u32 error_code; 355 } exception; 356 357 struct kvm_queued_interrupt { 358 bool pending; 359 bool soft; 360 u8 nr; 361 } interrupt; 362 363 int halt_request; /* real mode on Intel only */ 364 365 int cpuid_nent; 366 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES]; 367 /* emulate context */ 368 369 struct x86_emulate_ctxt emulate_ctxt; 370 371 gpa_t time; 372 struct pvclock_vcpu_time_info hv_clock; 373 unsigned int hw_tsc_khz; 374 unsigned int time_offset; 375 struct page *time_page; 376 u64 last_host_tsc; 377 u64 last_guest_tsc; 378 u64 last_kernel_ns; 379 u64 last_tsc_nsec; 380 u64 last_tsc_write; 381 bool tsc_catchup; 382 383 bool nmi_pending; 384 bool nmi_injected; 385 386 struct mtrr_state_type mtrr_state; 387 u32 pat; 388 389 int switch_db_regs; 390 unsigned long db[KVM_NR_DB_REGS]; 391 unsigned long dr6; 392 unsigned long dr7; 393 unsigned long eff_db[KVM_NR_DB_REGS]; 394 395 u64 mcg_cap; 396 u64 mcg_status; 397 u64 mcg_ctl; 398 u64 *mce_banks; 399 400 /* used for guest single stepping over the given code position */ 401 unsigned long singlestep_rip; 402 403 /* fields used by HYPER-V emulation */ 404 u64 hv_vapic; 405 406 cpumask_var_t wbinvd_dirty_mask; 407 408 struct { 409 bool halted; 410 gfn_t gfns[roundup_pow_of_two(ASYNC_PF_PER_VCPU)]; 411 struct gfn_to_hva_cache data; 412 u64 msr_val; 413 u32 id; 414 bool send_user_only; 415 } apf; 416 }; 417 418 struct kvm_arch { 419 unsigned int n_used_mmu_pages; 420 unsigned int n_requested_mmu_pages; 421 unsigned int n_max_mmu_pages; 422 atomic_t invlpg_counter; 423 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES]; 424 /* 425 * Hash table of struct kvm_mmu_page. 426 */ 427 struct list_head active_mmu_pages; 428 struct list_head assigned_dev_head; 429 struct iommu_domain *iommu_domain; 430 int iommu_flags; 431 struct kvm_pic *vpic; 432 struct kvm_ioapic *vioapic; 433 struct kvm_pit *vpit; 434 int vapics_in_nmi_mode; 435 436 unsigned int tss_addr; 437 struct page *apic_access_page; 438 439 gpa_t wall_clock; 440 441 struct page *ept_identity_pagetable; 442 bool ept_identity_pagetable_done; 443 gpa_t ept_identity_map_addr; 444 445 unsigned long irq_sources_bitmap; 446 s64 kvmclock_offset; 447 raw_spinlock_t tsc_write_lock; 448 u64 last_tsc_nsec; 449 u64 last_tsc_offset; 450 u64 last_tsc_write; 451 u32 virtual_tsc_khz; 452 u32 virtual_tsc_mult; 453 s8 virtual_tsc_shift; 454 455 struct kvm_xen_hvm_config xen_hvm_config; 456 457 /* fields used by HYPER-V emulation */ 458 u64 hv_guest_os_id; 459 u64 hv_hypercall; 460 461 #ifdef CONFIG_KVM_MMU_AUDIT 462 int audit_point; 463 #endif 464 }; 465 466 struct kvm_vm_stat { 467 u32 mmu_shadow_zapped; 468 u32 mmu_pte_write; 469 u32 mmu_pte_updated; 470 u32 mmu_pde_zapped; 471 u32 mmu_flooded; 472 u32 mmu_recycled; 473 u32 mmu_cache_miss; 474 u32 mmu_unsync; 475 u32 remote_tlb_flush; 476 u32 lpages; 477 }; 478 479 struct kvm_vcpu_stat { 480 u32 pf_fixed; 481 u32 pf_guest; 482 u32 tlb_flush; 483 u32 invlpg; 484 485 u32 exits; 486 u32 io_exits; 487 u32 mmio_exits; 488 u32 signal_exits; 489 u32 irq_window_exits; 490 u32 nmi_window_exits; 491 u32 halt_exits; 492 u32 halt_wakeup; 493 u32 request_irq_exits; 494 u32 irq_exits; 495 u32 host_state_reload; 496 u32 efer_reload; 497 u32 fpu_reload; 498 u32 insn_emulation; 499 u32 insn_emulation_fail; 500 u32 hypercalls; 501 u32 irq_injections; 502 u32 nmi_injections; 503 }; 504 505 struct kvm_x86_ops { 506 int (*cpu_has_kvm_support)(void); /* __init */ 507 int (*disabled_by_bios)(void); /* __init */ 508 int (*hardware_enable)(void *dummy); 509 void (*hardware_disable)(void *dummy); 510 void (*check_processor_compatibility)(void *rtn); 511 int (*hardware_setup)(void); /* __init */ 512 void (*hardware_unsetup)(void); /* __exit */ 513 bool (*cpu_has_accelerated_tpr)(void); 514 void (*cpuid_update)(struct kvm_vcpu *vcpu); 515 516 /* Create, but do not attach this VCPU */ 517 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id); 518 void (*vcpu_free)(struct kvm_vcpu *vcpu); 519 int (*vcpu_reset)(struct kvm_vcpu *vcpu); 520 521 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu); 522 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu); 523 void (*vcpu_put)(struct kvm_vcpu *vcpu); 524 525 void (*set_guest_debug)(struct kvm_vcpu *vcpu, 526 struct kvm_guest_debug *dbg); 527 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata); 528 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 529 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg); 530 void (*get_segment)(struct kvm_vcpu *vcpu, 531 struct kvm_segment *var, int seg); 532 int (*get_cpl)(struct kvm_vcpu *vcpu); 533 void (*set_segment)(struct kvm_vcpu *vcpu, 534 struct kvm_segment *var, int seg); 535 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l); 536 void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu); 537 void (*decache_cr3)(struct kvm_vcpu *vcpu); 538 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu); 539 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0); 540 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 541 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4); 542 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer); 543 void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 544 void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 545 void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 546 void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 547 void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value); 548 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg); 549 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu); 550 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags); 551 void (*fpu_activate)(struct kvm_vcpu *vcpu); 552 void (*fpu_deactivate)(struct kvm_vcpu *vcpu); 553 554 void (*tlb_flush)(struct kvm_vcpu *vcpu); 555 556 void (*run)(struct kvm_vcpu *vcpu); 557 int (*handle_exit)(struct kvm_vcpu *vcpu); 558 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu); 559 void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 560 u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 561 void (*patch_hypercall)(struct kvm_vcpu *vcpu, 562 unsigned char *hypercall_addr); 563 void (*set_irq)(struct kvm_vcpu *vcpu); 564 void (*set_nmi)(struct kvm_vcpu *vcpu); 565 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr, 566 bool has_error_code, u32 error_code, 567 bool reinject); 568 void (*cancel_injection)(struct kvm_vcpu *vcpu); 569 int (*interrupt_allowed)(struct kvm_vcpu *vcpu); 570 int (*nmi_allowed)(struct kvm_vcpu *vcpu); 571 bool (*get_nmi_mask)(struct kvm_vcpu *vcpu); 572 void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked); 573 void (*enable_nmi_window)(struct kvm_vcpu *vcpu); 574 void (*enable_irq_window)(struct kvm_vcpu *vcpu); 575 void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr); 576 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr); 577 int (*get_tdp_level)(void); 578 u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio); 579 int (*get_lpage_level)(void); 580 bool (*rdtscp_supported)(void); 581 void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment); 582 583 void (*set_tdp_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 584 585 void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry); 586 587 bool (*has_wbinvd_exit)(void); 588 589 void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset); 590 591 void (*get_exit_info)(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2); 592 const struct trace_print_flags *exit_reasons_str; 593 }; 594 595 struct kvm_arch_async_pf { 596 u32 token; 597 gfn_t gfn; 598 unsigned long cr3; 599 bool direct_map; 600 }; 601 602 extern struct kvm_x86_ops *kvm_x86_ops; 603 604 int kvm_mmu_module_init(void); 605 void kvm_mmu_module_exit(void); 606 607 void kvm_mmu_destroy(struct kvm_vcpu *vcpu); 608 int kvm_mmu_create(struct kvm_vcpu *vcpu); 609 int kvm_mmu_setup(struct kvm_vcpu *vcpu); 610 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte); 611 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask, 612 u64 dirty_mask, u64 nx_mask, u64 x_mask); 613 614 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu); 615 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot); 616 void kvm_mmu_zap_all(struct kvm *kvm); 617 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm); 618 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages); 619 620 int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3); 621 622 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, 623 const void *val, int bytes); 624 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes, 625 gpa_t addr, unsigned long *ret); 626 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn); 627 628 extern bool tdp_enabled; 629 630 enum emulation_result { 631 EMULATE_DONE, /* no further processing */ 632 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */ 633 EMULATE_FAIL, /* can't emulate this instruction */ 634 }; 635 636 #define EMULTYPE_NO_DECODE (1 << 0) 637 #define EMULTYPE_TRAP_UD (1 << 1) 638 #define EMULTYPE_SKIP (1 << 2) 639 int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2, 640 int emulation_type, void *insn, int insn_len); 641 642 static inline int emulate_instruction(struct kvm_vcpu *vcpu, 643 int emulation_type) 644 { 645 return x86_emulate_instruction(vcpu, 0, emulation_type, NULL, 0); 646 } 647 648 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address); 649 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address); 650 651 void kvm_enable_efer_bits(u64); 652 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data); 653 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 654 655 struct x86_emulate_ctxt; 656 657 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port); 658 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu); 659 int kvm_emulate_halt(struct kvm_vcpu *vcpu); 660 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address); 661 int emulate_clts(struct kvm_vcpu *vcpu); 662 int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu); 663 664 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); 665 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg); 666 667 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason, 668 bool has_error_code, u32 error_code); 669 670 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0); 671 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3); 672 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); 673 int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8); 674 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val); 675 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val); 676 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu); 677 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw); 678 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l); 679 int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr); 680 681 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata); 682 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data); 683 684 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu); 685 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); 686 687 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr); 688 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 689 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr); 690 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 691 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault); 692 int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, 693 gfn_t gfn, void *data, int offset, int len, 694 u32 access); 695 void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault); 696 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl); 697 698 int kvm_pic_set_irq(void *opaque, int irq, int level); 699 700 void kvm_inject_nmi(struct kvm_vcpu *vcpu); 701 702 int fx_init(struct kvm_vcpu *vcpu); 703 704 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu); 705 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, 706 const u8 *new, int bytes, 707 bool guest_initiated); 708 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva); 709 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu); 710 int kvm_mmu_load(struct kvm_vcpu *vcpu); 711 void kvm_mmu_unload(struct kvm_vcpu *vcpu); 712 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu); 713 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, 714 struct x86_exception *exception); 715 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, 716 struct x86_exception *exception); 717 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, 718 struct x86_exception *exception); 719 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, 720 struct x86_exception *exception); 721 722 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu); 723 724 int kvm_fix_hypercall(struct kvm_vcpu *vcpu); 725 726 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code, 727 void *insn, int insn_len); 728 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva); 729 730 void kvm_enable_tdp(void); 731 void kvm_disable_tdp(void); 732 733 int complete_pio(struct kvm_vcpu *vcpu); 734 bool kvm_check_iopl(struct kvm_vcpu *vcpu); 735 736 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page) 737 { 738 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT); 739 740 return (struct kvm_mmu_page *)page_private(page); 741 } 742 743 static inline u16 kvm_read_ldt(void) 744 { 745 u16 ldt; 746 asm("sldt %0" : "=g"(ldt)); 747 return ldt; 748 } 749 750 static inline void kvm_load_ldt(u16 sel) 751 { 752 asm("lldt %0" : : "rm"(sel)); 753 } 754 755 #ifdef CONFIG_X86_64 756 static inline unsigned long read_msr(unsigned long msr) 757 { 758 u64 value; 759 760 rdmsrl(msr, value); 761 return value; 762 } 763 #endif 764 765 static inline u32 get_rdx_init_val(void) 766 { 767 return 0x600; /* P6 family */ 768 } 769 770 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code) 771 { 772 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code); 773 } 774 775 #define TSS_IOPB_BASE_OFFSET 0x66 776 #define TSS_BASE_SIZE 0x68 777 #define TSS_IOPB_SIZE (65536 / 8) 778 #define TSS_REDIRECTION_SIZE (256 / 8) 779 #define RMODE_TSS_SIZE \ 780 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1) 781 782 enum { 783 TASK_SWITCH_CALL = 0, 784 TASK_SWITCH_IRET = 1, 785 TASK_SWITCH_JMP = 2, 786 TASK_SWITCH_GATE = 3, 787 }; 788 789 #define HF_GIF_MASK (1 << 0) 790 #define HF_HIF_MASK (1 << 1) 791 #define HF_VINTR_MASK (1 << 2) 792 #define HF_NMI_MASK (1 << 3) 793 #define HF_IRET_MASK (1 << 4) 794 #define HF_GUEST_MASK (1 << 5) /* VCPU is in guest-mode */ 795 796 /* 797 * Hardware virtualization extension instructions may fault if a 798 * reboot turns off virtualization while processes are running. 799 * Trap the fault and ignore the instruction if that happens. 800 */ 801 asmlinkage void kvm_spurious_fault(void); 802 extern bool kvm_rebooting; 803 804 #define __kvm_handle_fault_on_reboot(insn) \ 805 "666: " insn "\n\t" \ 806 "668: \n\t" \ 807 ".pushsection .fixup, \"ax\" \n" \ 808 "667: \n\t" \ 809 "cmpb $0, kvm_rebooting \n\t" \ 810 "jne 668b \n\t" \ 811 __ASM_SIZE(push) " $666b \n\t" \ 812 "call kvm_spurious_fault \n\t" \ 813 ".popsection \n\t" \ 814 ".pushsection __ex_table, \"a\" \n\t" \ 815 _ASM_PTR " 666b, 667b \n\t" \ 816 ".popsection" 817 818 #define KVM_ARCH_WANT_MMU_NOTIFIER 819 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 820 int kvm_age_hva(struct kvm *kvm, unsigned long hva); 821 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); 822 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 823 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu); 824 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu); 825 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu); 826 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 827 828 void kvm_define_shared_msr(unsigned index, u32 msr); 829 void kvm_set_shared_msr(unsigned index, u64 val, u64 mask); 830 831 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip); 832 833 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, 834 struct kvm_async_pf *work); 835 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, 836 struct kvm_async_pf *work); 837 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, 838 struct kvm_async_pf *work); 839 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu); 840 extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn); 841 842 void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err); 843 844 #endif /* _ASM_X86_KVM_HOST_H */ 845