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 #include <linux/irq_work.h> 20 21 #include <linux/kvm.h> 22 #include <linux/kvm_para.h> 23 #include <linux/kvm_types.h> 24 #include <linux/perf_event.h> 25 26 #include <asm/pvclock-abi.h> 27 #include <asm/desc.h> 28 #include <asm/mtrr.h> 29 #include <asm/msr-index.h> 30 31 #define KVM_MAX_VCPUS 254 32 #define KVM_SOFT_MAX_VCPUS 64 33 #define KVM_MEMORY_SLOTS 32 34 /* memory slots that does not exposed to userspace */ 35 #define KVM_PRIVATE_MEM_SLOTS 4 36 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS) 37 38 #define KVM_MMIO_SIZE 16 39 40 #define KVM_PIO_PAGE_OFFSET 1 41 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2 42 43 #define CR0_RESERVED_BITS \ 44 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ 45 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ 46 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) 47 48 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1) 49 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD)) 50 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \ 51 0xFFFFFF0000000000ULL) 52 #define CR4_RESERVED_BITS \ 53 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ 54 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ 55 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ 56 | X86_CR4_OSXSAVE | X86_CR4_SMEP | X86_CR4_RDWRGSFS \ 57 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) 58 59 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) 60 61 62 63 #define INVALID_PAGE (~(hpa_t)0) 64 #define VALID_PAGE(x) ((x) != INVALID_PAGE) 65 66 #define UNMAPPED_GVA (~(gpa_t)0) 67 68 /* KVM Hugepage definitions for x86 */ 69 #define KVM_NR_PAGE_SIZES 3 70 #define KVM_HPAGE_GFN_SHIFT(x) (((x) - 1) * 9) 71 #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + KVM_HPAGE_GFN_SHIFT(x)) 72 #define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x)) 73 #define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1)) 74 #define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE) 75 76 #define DE_VECTOR 0 77 #define DB_VECTOR 1 78 #define BP_VECTOR 3 79 #define OF_VECTOR 4 80 #define BR_VECTOR 5 81 #define UD_VECTOR 6 82 #define NM_VECTOR 7 83 #define DF_VECTOR 8 84 #define TS_VECTOR 10 85 #define NP_VECTOR 11 86 #define SS_VECTOR 12 87 #define GP_VECTOR 13 88 #define PF_VECTOR 14 89 #define MF_VECTOR 16 90 #define MC_VECTOR 18 91 92 #define SELECTOR_TI_MASK (1 << 2) 93 #define SELECTOR_RPL_MASK 0x03 94 95 #define IOPL_SHIFT 12 96 97 #define KVM_PERMILLE_MMU_PAGES 20 98 #define KVM_MIN_ALLOC_MMU_PAGES 64 99 #define KVM_MMU_HASH_SHIFT 10 100 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT) 101 #define KVM_MIN_FREE_MMU_PAGES 5 102 #define KVM_REFILL_PAGES 25 103 #define KVM_MAX_CPUID_ENTRIES 80 104 #define KVM_NR_FIXED_MTRR_REGION 88 105 #define KVM_NR_VAR_MTRR 8 106 107 #define ASYNC_PF_PER_VCPU 64 108 109 extern raw_spinlock_t kvm_lock; 110 extern struct list_head vm_list; 111 112 struct kvm_vcpu; 113 struct kvm; 114 struct kvm_async_pf; 115 116 enum kvm_reg { 117 VCPU_REGS_RAX = 0, 118 VCPU_REGS_RCX = 1, 119 VCPU_REGS_RDX = 2, 120 VCPU_REGS_RBX = 3, 121 VCPU_REGS_RSP = 4, 122 VCPU_REGS_RBP = 5, 123 VCPU_REGS_RSI = 6, 124 VCPU_REGS_RDI = 7, 125 #ifdef CONFIG_X86_64 126 VCPU_REGS_R8 = 8, 127 VCPU_REGS_R9 = 9, 128 VCPU_REGS_R10 = 10, 129 VCPU_REGS_R11 = 11, 130 VCPU_REGS_R12 = 12, 131 VCPU_REGS_R13 = 13, 132 VCPU_REGS_R14 = 14, 133 VCPU_REGS_R15 = 15, 134 #endif 135 VCPU_REGS_RIP, 136 NR_VCPU_REGS 137 }; 138 139 enum kvm_reg_ex { 140 VCPU_EXREG_PDPTR = NR_VCPU_REGS, 141 VCPU_EXREG_CR3, 142 VCPU_EXREG_RFLAGS, 143 VCPU_EXREG_CPL, 144 VCPU_EXREG_SEGMENTS, 145 }; 146 147 enum { 148 VCPU_SREG_ES, 149 VCPU_SREG_CS, 150 VCPU_SREG_SS, 151 VCPU_SREG_DS, 152 VCPU_SREG_FS, 153 VCPU_SREG_GS, 154 VCPU_SREG_TR, 155 VCPU_SREG_LDTR, 156 }; 157 158 #include <asm/kvm_emulate.h> 159 160 #define KVM_NR_MEM_OBJS 40 161 162 #define KVM_NR_DB_REGS 4 163 164 #define DR6_BD (1 << 13) 165 #define DR6_BS (1 << 14) 166 #define DR6_FIXED_1 0xffff0ff0 167 #define DR6_VOLATILE 0x0000e00f 168 169 #define DR7_BP_EN_MASK 0x000000ff 170 #define DR7_GE (1 << 9) 171 #define DR7_GD (1 << 13) 172 #define DR7_FIXED_1 0x00000400 173 #define DR7_VOLATILE 0xffff23ff 174 175 /* 176 * We don't want allocation failures within the mmu code, so we preallocate 177 * enough memory for a single page fault in a cache. 178 */ 179 struct kvm_mmu_memory_cache { 180 int nobjs; 181 void *objects[KVM_NR_MEM_OBJS]; 182 }; 183 184 #define NR_PTE_CHAIN_ENTRIES 5 185 186 struct kvm_pte_chain { 187 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES]; 188 struct hlist_node link; 189 }; 190 191 /* 192 * kvm_mmu_page_role, below, is defined as: 193 * 194 * bits 0:3 - total guest paging levels (2-4, or zero for real mode) 195 * bits 4:7 - page table level for this shadow (1-4) 196 * bits 8:9 - page table quadrant for 2-level guests 197 * bit 16 - direct mapping of virtual to physical mapping at gfn 198 * used for real mode and two-dimensional paging 199 * bits 17:19 - common access permissions for all ptes in this shadow page 200 */ 201 union kvm_mmu_page_role { 202 unsigned word; 203 struct { 204 unsigned level:4; 205 unsigned cr4_pae:1; 206 unsigned quadrant:2; 207 unsigned pad_for_nice_hex_output:6; 208 unsigned direct:1; 209 unsigned access:3; 210 unsigned invalid:1; 211 unsigned nxe:1; 212 unsigned cr0_wp:1; 213 unsigned smep_andnot_wp:1; 214 }; 215 }; 216 217 struct kvm_mmu_page { 218 struct list_head link; 219 struct hlist_node hash_link; 220 221 /* 222 * The following two entries are used to key the shadow page in the 223 * hash table. 224 */ 225 gfn_t gfn; 226 union kvm_mmu_page_role role; 227 228 u64 *spt; 229 /* hold the gfn of each spte inside spt */ 230 gfn_t *gfns; 231 /* 232 * One bit set per slot which has memory 233 * in this shadow page. 234 */ 235 DECLARE_BITMAP(slot_bitmap, KVM_MEM_SLOTS_NUM); 236 bool unsync; 237 int root_count; /* Currently serving as active root */ 238 unsigned int unsync_children; 239 unsigned long parent_ptes; /* Reverse mapping for parent_pte */ 240 DECLARE_BITMAP(unsync_child_bitmap, 512); 241 242 #ifdef CONFIG_X86_32 243 int clear_spte_count; 244 #endif 245 246 int write_flooding_count; 247 248 struct rcu_head rcu; 249 }; 250 251 struct kvm_pio_request { 252 unsigned long count; 253 int in; 254 int port; 255 int size; 256 }; 257 258 /* 259 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level 260 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu 261 * mode. 262 */ 263 struct kvm_mmu { 264 void (*new_cr3)(struct kvm_vcpu *vcpu); 265 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root); 266 unsigned long (*get_cr3)(struct kvm_vcpu *vcpu); 267 u64 (*get_pdptr)(struct kvm_vcpu *vcpu, int index); 268 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err, 269 bool prefault); 270 void (*inject_page_fault)(struct kvm_vcpu *vcpu, 271 struct x86_exception *fault); 272 void (*free)(struct kvm_vcpu *vcpu); 273 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access, 274 struct x86_exception *exception); 275 gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access); 276 int (*sync_page)(struct kvm_vcpu *vcpu, 277 struct kvm_mmu_page *sp); 278 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva); 279 void (*update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, 280 u64 *spte, const void *pte); 281 hpa_t root_hpa; 282 int root_level; 283 int shadow_root_level; 284 union kvm_mmu_page_role base_role; 285 bool direct_map; 286 287 u64 *pae_root; 288 u64 *lm_root; 289 u64 rsvd_bits_mask[2][4]; 290 291 bool nx; 292 293 u64 pdptrs[4]; /* pae */ 294 }; 295 296 enum pmc_type { 297 KVM_PMC_GP = 0, 298 KVM_PMC_FIXED, 299 }; 300 301 struct kvm_pmc { 302 enum pmc_type type; 303 u8 idx; 304 u64 counter; 305 u64 eventsel; 306 struct perf_event *perf_event; 307 struct kvm_vcpu *vcpu; 308 }; 309 310 struct kvm_pmu { 311 unsigned nr_arch_gp_counters; 312 unsigned nr_arch_fixed_counters; 313 unsigned available_event_types; 314 u64 fixed_ctr_ctrl; 315 u64 global_ctrl; 316 u64 global_status; 317 u64 global_ovf_ctrl; 318 u64 counter_bitmask[2]; 319 u64 global_ctrl_mask; 320 u8 version; 321 struct kvm_pmc gp_counters[X86_PMC_MAX_GENERIC]; 322 struct kvm_pmc fixed_counters[X86_PMC_MAX_FIXED]; 323 struct irq_work irq_work; 324 u64 reprogram_pmi; 325 }; 326 327 struct kvm_vcpu_arch { 328 /* 329 * rip and regs accesses must go through 330 * kvm_{register,rip}_{read,write} functions. 331 */ 332 unsigned long regs[NR_VCPU_REGS]; 333 u32 regs_avail; 334 u32 regs_dirty; 335 336 unsigned long cr0; 337 unsigned long cr0_guest_owned_bits; 338 unsigned long cr2; 339 unsigned long cr3; 340 unsigned long cr4; 341 unsigned long cr4_guest_owned_bits; 342 unsigned long cr8; 343 u32 hflags; 344 u64 efer; 345 u64 apic_base; 346 struct kvm_lapic *apic; /* kernel irqchip context */ 347 int32_t apic_arb_prio; 348 int mp_state; 349 int sipi_vector; 350 u64 ia32_misc_enable_msr; 351 bool tpr_access_reporting; 352 353 /* 354 * Paging state of the vcpu 355 * 356 * If the vcpu runs in guest mode with two level paging this still saves 357 * the paging mode of the l1 guest. This context is always used to 358 * handle faults. 359 */ 360 struct kvm_mmu mmu; 361 362 /* 363 * Paging state of an L2 guest (used for nested npt) 364 * 365 * This context will save all necessary information to walk page tables 366 * of the an L2 guest. This context is only initialized for page table 367 * walking and not for faulting since we never handle l2 page faults on 368 * the host. 369 */ 370 struct kvm_mmu nested_mmu; 371 372 /* 373 * Pointer to the mmu context currently used for 374 * gva_to_gpa translations. 375 */ 376 struct kvm_mmu *walk_mmu; 377 378 struct kvm_mmu_memory_cache mmu_pte_list_desc_cache; 379 struct kvm_mmu_memory_cache mmu_page_cache; 380 struct kvm_mmu_memory_cache mmu_page_header_cache; 381 382 struct fpu guest_fpu; 383 u64 xcr0; 384 385 struct kvm_pio_request pio; 386 void *pio_data; 387 388 u8 event_exit_inst_len; 389 390 struct kvm_queued_exception { 391 bool pending; 392 bool has_error_code; 393 bool reinject; 394 u8 nr; 395 u32 error_code; 396 } exception; 397 398 struct kvm_queued_interrupt { 399 bool pending; 400 bool soft; 401 u8 nr; 402 } interrupt; 403 404 int halt_request; /* real mode on Intel only */ 405 406 int cpuid_nent; 407 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES]; 408 /* emulate context */ 409 410 struct x86_emulate_ctxt emulate_ctxt; 411 bool emulate_regs_need_sync_to_vcpu; 412 bool emulate_regs_need_sync_from_vcpu; 413 414 gpa_t time; 415 struct pvclock_vcpu_time_info hv_clock; 416 unsigned int hw_tsc_khz; 417 unsigned int time_offset; 418 struct page *time_page; 419 420 struct { 421 u64 msr_val; 422 u64 last_steal; 423 u64 accum_steal; 424 struct gfn_to_hva_cache stime; 425 struct kvm_steal_time steal; 426 } st; 427 428 u64 last_guest_tsc; 429 u64 last_kernel_ns; 430 u64 last_tsc_nsec; 431 u64 last_tsc_write; 432 u32 virtual_tsc_khz; 433 bool tsc_catchup; 434 u32 tsc_catchup_mult; 435 s8 tsc_catchup_shift; 436 437 atomic_t nmi_queued; /* unprocessed asynchronous NMIs */ 438 unsigned nmi_pending; /* NMI queued after currently running handler */ 439 bool nmi_injected; /* Trying to inject an NMI this entry */ 440 441 struct mtrr_state_type mtrr_state; 442 u32 pat; 443 444 int switch_db_regs; 445 unsigned long db[KVM_NR_DB_REGS]; 446 unsigned long dr6; 447 unsigned long dr7; 448 unsigned long eff_db[KVM_NR_DB_REGS]; 449 450 u64 mcg_cap; 451 u64 mcg_status; 452 u64 mcg_ctl; 453 u64 *mce_banks; 454 455 /* Cache MMIO info */ 456 u64 mmio_gva; 457 unsigned access; 458 gfn_t mmio_gfn; 459 460 struct kvm_pmu pmu; 461 462 /* used for guest single stepping over the given code position */ 463 unsigned long singlestep_rip; 464 465 /* fields used by HYPER-V emulation */ 466 u64 hv_vapic; 467 468 cpumask_var_t wbinvd_dirty_mask; 469 470 unsigned long last_retry_eip; 471 unsigned long last_retry_addr; 472 473 struct { 474 bool halted; 475 gfn_t gfns[roundup_pow_of_two(ASYNC_PF_PER_VCPU)]; 476 struct gfn_to_hva_cache data; 477 u64 msr_val; 478 u32 id; 479 bool send_user_only; 480 } apf; 481 }; 482 483 struct kvm_arch { 484 unsigned int n_used_mmu_pages; 485 unsigned int n_requested_mmu_pages; 486 unsigned int n_max_mmu_pages; 487 unsigned int indirect_shadow_pages; 488 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES]; 489 /* 490 * Hash table of struct kvm_mmu_page. 491 */ 492 struct list_head active_mmu_pages; 493 struct list_head assigned_dev_head; 494 struct iommu_domain *iommu_domain; 495 int iommu_flags; 496 struct kvm_pic *vpic; 497 struct kvm_ioapic *vioapic; 498 struct kvm_pit *vpit; 499 int vapics_in_nmi_mode; 500 501 unsigned int tss_addr; 502 struct page *apic_access_page; 503 504 gpa_t wall_clock; 505 506 struct page *ept_identity_pagetable; 507 bool ept_identity_pagetable_done; 508 gpa_t ept_identity_map_addr; 509 510 unsigned long irq_sources_bitmap; 511 s64 kvmclock_offset; 512 raw_spinlock_t tsc_write_lock; 513 u64 last_tsc_nsec; 514 u64 last_tsc_offset; 515 u64 last_tsc_write; 516 517 struct kvm_xen_hvm_config xen_hvm_config; 518 519 /* fields used by HYPER-V emulation */ 520 u64 hv_guest_os_id; 521 u64 hv_hypercall; 522 523 atomic_t reader_counter; 524 525 #ifdef CONFIG_KVM_MMU_AUDIT 526 int audit_point; 527 #endif 528 }; 529 530 struct kvm_vm_stat { 531 u32 mmu_shadow_zapped; 532 u32 mmu_pte_write; 533 u32 mmu_pte_updated; 534 u32 mmu_pde_zapped; 535 u32 mmu_flooded; 536 u32 mmu_recycled; 537 u32 mmu_cache_miss; 538 u32 mmu_unsync; 539 u32 remote_tlb_flush; 540 u32 lpages; 541 }; 542 543 struct kvm_vcpu_stat { 544 u32 pf_fixed; 545 u32 pf_guest; 546 u32 tlb_flush; 547 u32 invlpg; 548 549 u32 exits; 550 u32 io_exits; 551 u32 mmio_exits; 552 u32 signal_exits; 553 u32 irq_window_exits; 554 u32 nmi_window_exits; 555 u32 halt_exits; 556 u32 halt_wakeup; 557 u32 request_irq_exits; 558 u32 irq_exits; 559 u32 host_state_reload; 560 u32 efer_reload; 561 u32 fpu_reload; 562 u32 insn_emulation; 563 u32 insn_emulation_fail; 564 u32 hypercalls; 565 u32 irq_injections; 566 u32 nmi_injections; 567 }; 568 569 struct x86_instruction_info; 570 571 struct kvm_x86_ops { 572 int (*cpu_has_kvm_support)(void); /* __init */ 573 int (*disabled_by_bios)(void); /* __init */ 574 int (*hardware_enable)(void *dummy); 575 void (*hardware_disable)(void *dummy); 576 void (*check_processor_compatibility)(void *rtn); 577 int (*hardware_setup)(void); /* __init */ 578 void (*hardware_unsetup)(void); /* __exit */ 579 bool (*cpu_has_accelerated_tpr)(void); 580 void (*cpuid_update)(struct kvm_vcpu *vcpu); 581 582 /* Create, but do not attach this VCPU */ 583 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id); 584 void (*vcpu_free)(struct kvm_vcpu *vcpu); 585 int (*vcpu_reset)(struct kvm_vcpu *vcpu); 586 587 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu); 588 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu); 589 void (*vcpu_put)(struct kvm_vcpu *vcpu); 590 591 void (*set_guest_debug)(struct kvm_vcpu *vcpu, 592 struct kvm_guest_debug *dbg); 593 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata); 594 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 595 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg); 596 void (*get_segment)(struct kvm_vcpu *vcpu, 597 struct kvm_segment *var, int seg); 598 int (*get_cpl)(struct kvm_vcpu *vcpu); 599 void (*set_segment)(struct kvm_vcpu *vcpu, 600 struct kvm_segment *var, int seg); 601 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l); 602 void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu); 603 void (*decache_cr3)(struct kvm_vcpu *vcpu); 604 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu); 605 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0); 606 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 607 int (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4); 608 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer); 609 void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 610 void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 611 void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 612 void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 613 void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value); 614 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg); 615 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu); 616 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags); 617 void (*fpu_activate)(struct kvm_vcpu *vcpu); 618 void (*fpu_deactivate)(struct kvm_vcpu *vcpu); 619 620 void (*tlb_flush)(struct kvm_vcpu *vcpu); 621 622 void (*run)(struct kvm_vcpu *vcpu); 623 int (*handle_exit)(struct kvm_vcpu *vcpu); 624 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu); 625 void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 626 u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 627 void (*patch_hypercall)(struct kvm_vcpu *vcpu, 628 unsigned char *hypercall_addr); 629 void (*set_irq)(struct kvm_vcpu *vcpu); 630 void (*set_nmi)(struct kvm_vcpu *vcpu); 631 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr, 632 bool has_error_code, u32 error_code, 633 bool reinject); 634 void (*cancel_injection)(struct kvm_vcpu *vcpu); 635 int (*interrupt_allowed)(struct kvm_vcpu *vcpu); 636 int (*nmi_allowed)(struct kvm_vcpu *vcpu); 637 bool (*get_nmi_mask)(struct kvm_vcpu *vcpu); 638 void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked); 639 void (*enable_nmi_window)(struct kvm_vcpu *vcpu); 640 void (*enable_irq_window)(struct kvm_vcpu *vcpu); 641 void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr); 642 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr); 643 int (*get_tdp_level)(void); 644 u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio); 645 int (*get_lpage_level)(void); 646 bool (*rdtscp_supported)(void); 647 void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment); 648 649 void (*set_tdp_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 650 651 void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry); 652 653 bool (*has_wbinvd_exit)(void); 654 655 void (*set_tsc_khz)(struct kvm_vcpu *vcpu, u32 user_tsc_khz); 656 void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset); 657 658 u64 (*compute_tsc_offset)(struct kvm_vcpu *vcpu, u64 target_tsc); 659 u64 (*read_l1_tsc)(struct kvm_vcpu *vcpu); 660 661 void (*get_exit_info)(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2); 662 663 int (*check_intercept)(struct kvm_vcpu *vcpu, 664 struct x86_instruction_info *info, 665 enum x86_intercept_stage stage); 666 }; 667 668 struct kvm_arch_async_pf { 669 u32 token; 670 gfn_t gfn; 671 unsigned long cr3; 672 bool direct_map; 673 }; 674 675 extern struct kvm_x86_ops *kvm_x86_ops; 676 677 int kvm_mmu_module_init(void); 678 void kvm_mmu_module_exit(void); 679 680 void kvm_mmu_destroy(struct kvm_vcpu *vcpu); 681 int kvm_mmu_create(struct kvm_vcpu *vcpu); 682 int kvm_mmu_setup(struct kvm_vcpu *vcpu); 683 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask, 684 u64 dirty_mask, u64 nx_mask, u64 x_mask); 685 686 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu); 687 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot); 688 int kvm_mmu_rmap_write_protect(struct kvm *kvm, u64 gfn, 689 struct kvm_memory_slot *slot); 690 void kvm_mmu_zap_all(struct kvm *kvm); 691 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm); 692 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages); 693 694 int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3); 695 696 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, 697 const void *val, int bytes); 698 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn); 699 700 extern bool tdp_enabled; 701 702 u64 vcpu_tsc_khz(struct kvm_vcpu *vcpu); 703 704 /* control of guest tsc rate supported? */ 705 extern bool kvm_has_tsc_control; 706 /* minimum supported tsc_khz for guests */ 707 extern u32 kvm_min_guest_tsc_khz; 708 /* maximum supported tsc_khz for guests */ 709 extern u32 kvm_max_guest_tsc_khz; 710 711 enum emulation_result { 712 EMULATE_DONE, /* no further processing */ 713 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */ 714 EMULATE_FAIL, /* can't emulate this instruction */ 715 }; 716 717 #define EMULTYPE_NO_DECODE (1 << 0) 718 #define EMULTYPE_TRAP_UD (1 << 1) 719 #define EMULTYPE_SKIP (1 << 2) 720 #define EMULTYPE_RETRY (1 << 3) 721 int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2, 722 int emulation_type, void *insn, int insn_len); 723 724 static inline int emulate_instruction(struct kvm_vcpu *vcpu, 725 int emulation_type) 726 { 727 return x86_emulate_instruction(vcpu, 0, emulation_type, NULL, 0); 728 } 729 730 void kvm_enable_efer_bits(u64); 731 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data); 732 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 733 734 struct x86_emulate_ctxt; 735 736 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port); 737 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu); 738 int kvm_emulate_halt(struct kvm_vcpu *vcpu); 739 int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu); 740 741 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); 742 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg); 743 744 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason, 745 bool has_error_code, u32 error_code); 746 747 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0); 748 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3); 749 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); 750 int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8); 751 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val); 752 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val); 753 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu); 754 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw); 755 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l); 756 int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr); 757 758 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata); 759 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data); 760 761 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu); 762 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); 763 bool kvm_rdpmc(struct kvm_vcpu *vcpu); 764 765 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr); 766 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 767 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr); 768 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 769 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault); 770 int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, 771 gfn_t gfn, void *data, int offset, int len, 772 u32 access); 773 void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault); 774 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl); 775 776 int kvm_pic_set_irq(void *opaque, int irq, int level); 777 778 void kvm_inject_nmi(struct kvm_vcpu *vcpu); 779 780 int fx_init(struct kvm_vcpu *vcpu); 781 782 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu); 783 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, 784 const u8 *new, int bytes); 785 int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn); 786 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva); 787 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu); 788 int kvm_mmu_load(struct kvm_vcpu *vcpu); 789 void kvm_mmu_unload(struct kvm_vcpu *vcpu); 790 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu); 791 gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access); 792 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, 793 struct x86_exception *exception); 794 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, 795 struct x86_exception *exception); 796 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, 797 struct x86_exception *exception); 798 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, 799 struct x86_exception *exception); 800 801 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu); 802 803 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code, 804 void *insn, int insn_len); 805 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva); 806 807 void kvm_enable_tdp(void); 808 void kvm_disable_tdp(void); 809 810 int complete_pio(struct kvm_vcpu *vcpu); 811 bool kvm_check_iopl(struct kvm_vcpu *vcpu); 812 813 static inline gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) 814 { 815 return gpa; 816 } 817 818 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page) 819 { 820 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT); 821 822 return (struct kvm_mmu_page *)page_private(page); 823 } 824 825 static inline u16 kvm_read_ldt(void) 826 { 827 u16 ldt; 828 asm("sldt %0" : "=g"(ldt)); 829 return ldt; 830 } 831 832 static inline void kvm_load_ldt(u16 sel) 833 { 834 asm("lldt %0" : : "rm"(sel)); 835 } 836 837 #ifdef CONFIG_X86_64 838 static inline unsigned long read_msr(unsigned long msr) 839 { 840 u64 value; 841 842 rdmsrl(msr, value); 843 return value; 844 } 845 #endif 846 847 static inline u32 get_rdx_init_val(void) 848 { 849 return 0x600; /* P6 family */ 850 } 851 852 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code) 853 { 854 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code); 855 } 856 857 #define TSS_IOPB_BASE_OFFSET 0x66 858 #define TSS_BASE_SIZE 0x68 859 #define TSS_IOPB_SIZE (65536 / 8) 860 #define TSS_REDIRECTION_SIZE (256 / 8) 861 #define RMODE_TSS_SIZE \ 862 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1) 863 864 enum { 865 TASK_SWITCH_CALL = 0, 866 TASK_SWITCH_IRET = 1, 867 TASK_SWITCH_JMP = 2, 868 TASK_SWITCH_GATE = 3, 869 }; 870 871 #define HF_GIF_MASK (1 << 0) 872 #define HF_HIF_MASK (1 << 1) 873 #define HF_VINTR_MASK (1 << 2) 874 #define HF_NMI_MASK (1 << 3) 875 #define HF_IRET_MASK (1 << 4) 876 #define HF_GUEST_MASK (1 << 5) /* VCPU is in guest-mode */ 877 878 /* 879 * Hardware virtualization extension instructions may fault if a 880 * reboot turns off virtualization while processes are running. 881 * Trap the fault and ignore the instruction if that happens. 882 */ 883 asmlinkage void kvm_spurious_fault(void); 884 extern bool kvm_rebooting; 885 886 #define ____kvm_handle_fault_on_reboot(insn, cleanup_insn) \ 887 "666: " insn "\n\t" \ 888 "668: \n\t" \ 889 ".pushsection .fixup, \"ax\" \n" \ 890 "667: \n\t" \ 891 cleanup_insn "\n\t" \ 892 "cmpb $0, kvm_rebooting \n\t" \ 893 "jne 668b \n\t" \ 894 __ASM_SIZE(push) " $666b \n\t" \ 895 "call kvm_spurious_fault \n\t" \ 896 ".popsection \n\t" \ 897 ".pushsection __ex_table, \"a\" \n\t" \ 898 _ASM_PTR " 666b, 667b \n\t" \ 899 ".popsection" 900 901 #define __kvm_handle_fault_on_reboot(insn) \ 902 ____kvm_handle_fault_on_reboot(insn, "") 903 904 #define KVM_ARCH_WANT_MMU_NOTIFIER 905 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 906 int kvm_age_hva(struct kvm *kvm, unsigned long hva); 907 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); 908 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 909 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu); 910 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu); 911 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu); 912 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 913 914 void kvm_define_shared_msr(unsigned index, u32 msr); 915 void kvm_set_shared_msr(unsigned index, u64 val, u64 mask); 916 917 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip); 918 919 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, 920 struct kvm_async_pf *work); 921 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, 922 struct kvm_async_pf *work); 923 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, 924 struct kvm_async_pf *work); 925 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu); 926 extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn); 927 928 void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err); 929 930 int kvm_is_in_guest(void); 931 932 void kvm_pmu_init(struct kvm_vcpu *vcpu); 933 void kvm_pmu_destroy(struct kvm_vcpu *vcpu); 934 void kvm_pmu_reset(struct kvm_vcpu *vcpu); 935 void kvm_pmu_cpuid_update(struct kvm_vcpu *vcpu); 936 bool kvm_pmu_msr(struct kvm_vcpu *vcpu, u32 msr); 937 int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *data); 938 int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data); 939 int kvm_pmu_read_pmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data); 940 void kvm_handle_pmu_event(struct kvm_vcpu *vcpu); 941 void kvm_deliver_pmi(struct kvm_vcpu *vcpu); 942 943 #endif /* _ASM_X86_KVM_HOST_H */ 944