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 #include <linux/pvclock_gtod.h> 26 #include <linux/clocksource.h> 27 #include <linux/irqbypass.h> 28 #include <linux/hyperv.h> 29 30 #include <asm/pvclock-abi.h> 31 #include <asm/desc.h> 32 #include <asm/mtrr.h> 33 #include <asm/msr-index.h> 34 #include <asm/asm.h> 35 #include <asm/kvm_page_track.h> 36 37 #define KVM_MAX_VCPUS 255 38 #define KVM_SOFT_MAX_VCPUS 160 39 #define KVM_USER_MEM_SLOTS 509 40 /* memory slots that are not exposed to userspace */ 41 #define KVM_PRIVATE_MEM_SLOTS 3 42 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS) 43 44 #define KVM_PIO_PAGE_OFFSET 1 45 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2 46 #define KVM_HALT_POLL_NS_DEFAULT 500000 47 48 #define KVM_IRQCHIP_NUM_PINS KVM_IOAPIC_NUM_PINS 49 50 /* x86-specific vcpu->requests bit members */ 51 #define KVM_REQ_MIGRATE_TIMER 8 52 #define KVM_REQ_REPORT_TPR_ACCESS 9 53 #define KVM_REQ_TRIPLE_FAULT 10 54 #define KVM_REQ_MMU_SYNC 11 55 #define KVM_REQ_CLOCK_UPDATE 12 56 #define KVM_REQ_DEACTIVATE_FPU 13 57 #define KVM_REQ_EVENT 14 58 #define KVM_REQ_APF_HALT 15 59 #define KVM_REQ_STEAL_UPDATE 16 60 #define KVM_REQ_NMI 17 61 #define KVM_REQ_PMU 18 62 #define KVM_REQ_PMI 19 63 #define KVM_REQ_SMI 20 64 #define KVM_REQ_MASTERCLOCK_UPDATE 21 65 #define KVM_REQ_MCLOCK_INPROGRESS 22 66 #define KVM_REQ_SCAN_IOAPIC 23 67 #define KVM_REQ_GLOBAL_CLOCK_UPDATE 24 68 #define KVM_REQ_APIC_PAGE_RELOAD 25 69 #define KVM_REQ_HV_CRASH 26 70 #define KVM_REQ_IOAPIC_EOI_EXIT 27 71 #define KVM_REQ_HV_RESET 28 72 #define KVM_REQ_HV_EXIT 29 73 #define KVM_REQ_HV_STIMER 30 74 75 #define CR0_RESERVED_BITS \ 76 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ 77 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ 78 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) 79 80 #define CR3_L_MODE_RESERVED_BITS 0xFFFFFF0000000000ULL 81 #define CR3_PCID_INVD BIT_64(63) 82 #define CR4_RESERVED_BITS \ 83 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ 84 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ 85 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR | X86_CR4_PCIDE \ 86 | X86_CR4_OSXSAVE | X86_CR4_SMEP | X86_CR4_FSGSBASE \ 87 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE | X86_CR4_SMAP)) 88 89 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) 90 91 92 93 #define INVALID_PAGE (~(hpa_t)0) 94 #define VALID_PAGE(x) ((x) != INVALID_PAGE) 95 96 #define UNMAPPED_GVA (~(gpa_t)0) 97 98 /* KVM Hugepage definitions for x86 */ 99 #define KVM_NR_PAGE_SIZES 3 100 #define KVM_HPAGE_GFN_SHIFT(x) (((x) - 1) * 9) 101 #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + KVM_HPAGE_GFN_SHIFT(x)) 102 #define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x)) 103 #define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1)) 104 #define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE) 105 106 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level) 107 { 108 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */ 109 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) - 110 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level)); 111 } 112 113 #define KVM_PERMILLE_MMU_PAGES 20 114 #define KVM_MIN_ALLOC_MMU_PAGES 64 115 #define KVM_MMU_HASH_SHIFT 10 116 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT) 117 #define KVM_MIN_FREE_MMU_PAGES 5 118 #define KVM_REFILL_PAGES 25 119 #define KVM_MAX_CPUID_ENTRIES 80 120 #define KVM_NR_FIXED_MTRR_REGION 88 121 #define KVM_NR_VAR_MTRR 8 122 123 #define ASYNC_PF_PER_VCPU 64 124 125 enum kvm_reg { 126 VCPU_REGS_RAX = 0, 127 VCPU_REGS_RCX = 1, 128 VCPU_REGS_RDX = 2, 129 VCPU_REGS_RBX = 3, 130 VCPU_REGS_RSP = 4, 131 VCPU_REGS_RBP = 5, 132 VCPU_REGS_RSI = 6, 133 VCPU_REGS_RDI = 7, 134 #ifdef CONFIG_X86_64 135 VCPU_REGS_R8 = 8, 136 VCPU_REGS_R9 = 9, 137 VCPU_REGS_R10 = 10, 138 VCPU_REGS_R11 = 11, 139 VCPU_REGS_R12 = 12, 140 VCPU_REGS_R13 = 13, 141 VCPU_REGS_R14 = 14, 142 VCPU_REGS_R15 = 15, 143 #endif 144 VCPU_REGS_RIP, 145 NR_VCPU_REGS 146 }; 147 148 enum kvm_reg_ex { 149 VCPU_EXREG_PDPTR = NR_VCPU_REGS, 150 VCPU_EXREG_CR3, 151 VCPU_EXREG_RFLAGS, 152 VCPU_EXREG_SEGMENTS, 153 }; 154 155 enum { 156 VCPU_SREG_ES, 157 VCPU_SREG_CS, 158 VCPU_SREG_SS, 159 VCPU_SREG_DS, 160 VCPU_SREG_FS, 161 VCPU_SREG_GS, 162 VCPU_SREG_TR, 163 VCPU_SREG_LDTR, 164 }; 165 166 #include <asm/kvm_emulate.h> 167 168 #define KVM_NR_MEM_OBJS 40 169 170 #define KVM_NR_DB_REGS 4 171 172 #define DR6_BD (1 << 13) 173 #define DR6_BS (1 << 14) 174 #define DR6_RTM (1 << 16) 175 #define DR6_FIXED_1 0xfffe0ff0 176 #define DR6_INIT 0xffff0ff0 177 #define DR6_VOLATILE 0x0001e00f 178 179 #define DR7_BP_EN_MASK 0x000000ff 180 #define DR7_GE (1 << 9) 181 #define DR7_GD (1 << 13) 182 #define DR7_FIXED_1 0x00000400 183 #define DR7_VOLATILE 0xffff2bff 184 185 #define PFERR_PRESENT_BIT 0 186 #define PFERR_WRITE_BIT 1 187 #define PFERR_USER_BIT 2 188 #define PFERR_RSVD_BIT 3 189 #define PFERR_FETCH_BIT 4 190 191 #define PFERR_PRESENT_MASK (1U << PFERR_PRESENT_BIT) 192 #define PFERR_WRITE_MASK (1U << PFERR_WRITE_BIT) 193 #define PFERR_USER_MASK (1U << PFERR_USER_BIT) 194 #define PFERR_RSVD_MASK (1U << PFERR_RSVD_BIT) 195 #define PFERR_FETCH_MASK (1U << PFERR_FETCH_BIT) 196 197 /* apic attention bits */ 198 #define KVM_APIC_CHECK_VAPIC 0 199 /* 200 * The following bit is set with PV-EOI, unset on EOI. 201 * We detect PV-EOI changes by guest by comparing 202 * this bit with PV-EOI in guest memory. 203 * See the implementation in apic_update_pv_eoi. 204 */ 205 #define KVM_APIC_PV_EOI_PENDING 1 206 207 struct kvm_kernel_irq_routing_entry; 208 209 /* 210 * We don't want allocation failures within the mmu code, so we preallocate 211 * enough memory for a single page fault in a cache. 212 */ 213 struct kvm_mmu_memory_cache { 214 int nobjs; 215 void *objects[KVM_NR_MEM_OBJS]; 216 }; 217 218 /* 219 * the pages used as guest page table on soft mmu are tracked by 220 * kvm_memory_slot.arch.gfn_track which is 16 bits, so the role bits used 221 * by indirect shadow page can not be more than 15 bits. 222 * 223 * Currently, we used 14 bits that are @level, @cr4_pae, @quadrant, @access, 224 * @nxe, @cr0_wp, @smep_andnot_wp and @smap_andnot_wp. 225 */ 226 union kvm_mmu_page_role { 227 unsigned word; 228 struct { 229 unsigned level:4; 230 unsigned cr4_pae:1; 231 unsigned quadrant:2; 232 unsigned direct:1; 233 unsigned access:3; 234 unsigned invalid:1; 235 unsigned nxe:1; 236 unsigned cr0_wp:1; 237 unsigned smep_andnot_wp:1; 238 unsigned smap_andnot_wp:1; 239 unsigned :8; 240 241 /* 242 * This is left at the top of the word so that 243 * kvm_memslots_for_spte_role can extract it with a 244 * simple shift. While there is room, give it a whole 245 * byte so it is also faster to load it from memory. 246 */ 247 unsigned smm:8; 248 }; 249 }; 250 251 struct kvm_rmap_head { 252 unsigned long val; 253 }; 254 255 struct kvm_mmu_page { 256 struct list_head link; 257 struct hlist_node hash_link; 258 259 /* 260 * The following two entries are used to key the shadow page in the 261 * hash table. 262 */ 263 gfn_t gfn; 264 union kvm_mmu_page_role role; 265 266 u64 *spt; 267 /* hold the gfn of each spte inside spt */ 268 gfn_t *gfns; 269 bool unsync; 270 int root_count; /* Currently serving as active root */ 271 unsigned int unsync_children; 272 struct kvm_rmap_head parent_ptes; /* rmap pointers to parent sptes */ 273 274 /* The page is obsolete if mmu_valid_gen != kvm->arch.mmu_valid_gen. */ 275 unsigned long mmu_valid_gen; 276 277 DECLARE_BITMAP(unsync_child_bitmap, 512); 278 279 #ifdef CONFIG_X86_32 280 /* 281 * Used out of the mmu-lock to avoid reading spte values while an 282 * update is in progress; see the comments in __get_spte_lockless(). 283 */ 284 int clear_spte_count; 285 #endif 286 287 /* Number of writes since the last time traversal visited this page. */ 288 atomic_t write_flooding_count; 289 }; 290 291 struct kvm_pio_request { 292 unsigned long count; 293 int in; 294 int port; 295 int size; 296 }; 297 298 struct rsvd_bits_validate { 299 u64 rsvd_bits_mask[2][4]; 300 u64 bad_mt_xwr; 301 }; 302 303 /* 304 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level 305 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu 306 * mode. 307 */ 308 struct kvm_mmu { 309 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root); 310 unsigned long (*get_cr3)(struct kvm_vcpu *vcpu); 311 u64 (*get_pdptr)(struct kvm_vcpu *vcpu, int index); 312 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err, 313 bool prefault); 314 void (*inject_page_fault)(struct kvm_vcpu *vcpu, 315 struct x86_exception *fault); 316 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access, 317 struct x86_exception *exception); 318 gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access, 319 struct x86_exception *exception); 320 int (*sync_page)(struct kvm_vcpu *vcpu, 321 struct kvm_mmu_page *sp); 322 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva); 323 void (*update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, 324 u64 *spte, const void *pte); 325 hpa_t root_hpa; 326 int root_level; 327 int shadow_root_level; 328 union kvm_mmu_page_role base_role; 329 bool direct_map; 330 331 /* 332 * Bitmap; bit set = permission fault 333 * Byte index: page fault error code [4:1] 334 * Bit index: pte permissions in ACC_* format 335 */ 336 u8 permissions[16]; 337 338 u64 *pae_root; 339 u64 *lm_root; 340 341 /* 342 * check zero bits on shadow page table entries, these 343 * bits include not only hardware reserved bits but also 344 * the bits spte never used. 345 */ 346 struct rsvd_bits_validate shadow_zero_check; 347 348 struct rsvd_bits_validate guest_rsvd_check; 349 350 /* Can have large pages at levels 2..last_nonleaf_level-1. */ 351 u8 last_nonleaf_level; 352 353 bool nx; 354 355 u64 pdptrs[4]; /* pae */ 356 }; 357 358 enum pmc_type { 359 KVM_PMC_GP = 0, 360 KVM_PMC_FIXED, 361 }; 362 363 struct kvm_pmc { 364 enum pmc_type type; 365 u8 idx; 366 u64 counter; 367 u64 eventsel; 368 struct perf_event *perf_event; 369 struct kvm_vcpu *vcpu; 370 }; 371 372 struct kvm_pmu { 373 unsigned nr_arch_gp_counters; 374 unsigned nr_arch_fixed_counters; 375 unsigned available_event_types; 376 u64 fixed_ctr_ctrl; 377 u64 global_ctrl; 378 u64 global_status; 379 u64 global_ovf_ctrl; 380 u64 counter_bitmask[2]; 381 u64 global_ctrl_mask; 382 u64 reserved_bits; 383 u8 version; 384 struct kvm_pmc gp_counters[INTEL_PMC_MAX_GENERIC]; 385 struct kvm_pmc fixed_counters[INTEL_PMC_MAX_FIXED]; 386 struct irq_work irq_work; 387 u64 reprogram_pmi; 388 }; 389 390 struct kvm_pmu_ops; 391 392 enum { 393 KVM_DEBUGREG_BP_ENABLED = 1, 394 KVM_DEBUGREG_WONT_EXIT = 2, 395 KVM_DEBUGREG_RELOAD = 4, 396 }; 397 398 struct kvm_mtrr_range { 399 u64 base; 400 u64 mask; 401 struct list_head node; 402 }; 403 404 struct kvm_mtrr { 405 struct kvm_mtrr_range var_ranges[KVM_NR_VAR_MTRR]; 406 mtrr_type fixed_ranges[KVM_NR_FIXED_MTRR_REGION]; 407 u64 deftype; 408 409 struct list_head head; 410 }; 411 412 /* Hyper-V SynIC timer */ 413 struct kvm_vcpu_hv_stimer { 414 struct hrtimer timer; 415 int index; 416 u64 config; 417 u64 count; 418 u64 exp_time; 419 struct hv_message msg; 420 bool msg_pending; 421 }; 422 423 /* Hyper-V synthetic interrupt controller (SynIC)*/ 424 struct kvm_vcpu_hv_synic { 425 u64 version; 426 u64 control; 427 u64 msg_page; 428 u64 evt_page; 429 atomic64_t sint[HV_SYNIC_SINT_COUNT]; 430 atomic_t sint_to_gsi[HV_SYNIC_SINT_COUNT]; 431 DECLARE_BITMAP(auto_eoi_bitmap, 256); 432 DECLARE_BITMAP(vec_bitmap, 256); 433 bool active; 434 }; 435 436 /* Hyper-V per vcpu emulation context */ 437 struct kvm_vcpu_hv { 438 u64 hv_vapic; 439 s64 runtime_offset; 440 struct kvm_vcpu_hv_synic synic; 441 struct kvm_hyperv_exit exit; 442 struct kvm_vcpu_hv_stimer stimer[HV_SYNIC_STIMER_COUNT]; 443 DECLARE_BITMAP(stimer_pending_bitmap, HV_SYNIC_STIMER_COUNT); 444 }; 445 446 struct kvm_vcpu_arch { 447 /* 448 * rip and regs accesses must go through 449 * kvm_{register,rip}_{read,write} functions. 450 */ 451 unsigned long regs[NR_VCPU_REGS]; 452 u32 regs_avail; 453 u32 regs_dirty; 454 455 unsigned long cr0; 456 unsigned long cr0_guest_owned_bits; 457 unsigned long cr2; 458 unsigned long cr3; 459 unsigned long cr4; 460 unsigned long cr4_guest_owned_bits; 461 unsigned long cr8; 462 u32 hflags; 463 u64 efer; 464 u64 apic_base; 465 struct kvm_lapic *apic; /* kernel irqchip context */ 466 bool apicv_active; 467 DECLARE_BITMAP(ioapic_handled_vectors, 256); 468 unsigned long apic_attention; 469 int32_t apic_arb_prio; 470 int mp_state; 471 u64 ia32_misc_enable_msr; 472 u64 smbase; 473 bool tpr_access_reporting; 474 u64 ia32_xss; 475 476 /* 477 * Paging state of the vcpu 478 * 479 * If the vcpu runs in guest mode with two level paging this still saves 480 * the paging mode of the l1 guest. This context is always used to 481 * handle faults. 482 */ 483 struct kvm_mmu mmu; 484 485 /* 486 * Paging state of an L2 guest (used for nested npt) 487 * 488 * This context will save all necessary information to walk page tables 489 * of the an L2 guest. This context is only initialized for page table 490 * walking and not for faulting since we never handle l2 page faults on 491 * the host. 492 */ 493 struct kvm_mmu nested_mmu; 494 495 /* 496 * Pointer to the mmu context currently used for 497 * gva_to_gpa translations. 498 */ 499 struct kvm_mmu *walk_mmu; 500 501 struct kvm_mmu_memory_cache mmu_pte_list_desc_cache; 502 struct kvm_mmu_memory_cache mmu_page_cache; 503 struct kvm_mmu_memory_cache mmu_page_header_cache; 504 505 struct fpu guest_fpu; 506 u64 xcr0; 507 u64 guest_supported_xcr0; 508 u32 guest_xstate_size; 509 510 struct kvm_pio_request pio; 511 void *pio_data; 512 513 u8 event_exit_inst_len; 514 515 struct kvm_queued_exception { 516 bool pending; 517 bool has_error_code; 518 bool reinject; 519 u8 nr; 520 u32 error_code; 521 } exception; 522 523 struct kvm_queued_interrupt { 524 bool pending; 525 bool soft; 526 u8 nr; 527 } interrupt; 528 529 int halt_request; /* real mode on Intel only */ 530 531 int cpuid_nent; 532 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES]; 533 534 int maxphyaddr; 535 536 /* emulate context */ 537 538 struct x86_emulate_ctxt emulate_ctxt; 539 bool emulate_regs_need_sync_to_vcpu; 540 bool emulate_regs_need_sync_from_vcpu; 541 int (*complete_userspace_io)(struct kvm_vcpu *vcpu); 542 543 gpa_t time; 544 struct pvclock_vcpu_time_info hv_clock; 545 unsigned int hw_tsc_khz; 546 struct gfn_to_hva_cache pv_time; 547 bool pv_time_enabled; 548 /* set guest stopped flag in pvclock flags field */ 549 bool pvclock_set_guest_stopped_request; 550 551 struct { 552 u64 msr_val; 553 u64 last_steal; 554 u64 accum_steal; 555 struct gfn_to_hva_cache stime; 556 struct kvm_steal_time steal; 557 } st; 558 559 u64 last_guest_tsc; 560 u64 last_host_tsc; 561 u64 tsc_offset_adjustment; 562 u64 this_tsc_nsec; 563 u64 this_tsc_write; 564 u64 this_tsc_generation; 565 bool tsc_catchup; 566 bool tsc_always_catchup; 567 s8 virtual_tsc_shift; 568 u32 virtual_tsc_mult; 569 u32 virtual_tsc_khz; 570 s64 ia32_tsc_adjust_msr; 571 u64 tsc_scaling_ratio; 572 573 atomic_t nmi_queued; /* unprocessed asynchronous NMIs */ 574 unsigned nmi_pending; /* NMI queued after currently running handler */ 575 bool nmi_injected; /* Trying to inject an NMI this entry */ 576 bool smi_pending; /* SMI queued after currently running handler */ 577 578 struct kvm_mtrr mtrr_state; 579 u64 pat; 580 581 unsigned switch_db_regs; 582 unsigned long db[KVM_NR_DB_REGS]; 583 unsigned long dr6; 584 unsigned long dr7; 585 unsigned long eff_db[KVM_NR_DB_REGS]; 586 unsigned long guest_debug_dr7; 587 588 u64 mcg_cap; 589 u64 mcg_status; 590 u64 mcg_ctl; 591 u64 *mce_banks; 592 593 /* Cache MMIO info */ 594 u64 mmio_gva; 595 unsigned access; 596 gfn_t mmio_gfn; 597 u64 mmio_gen; 598 599 struct kvm_pmu pmu; 600 601 /* used for guest single stepping over the given code position */ 602 unsigned long singlestep_rip; 603 604 struct kvm_vcpu_hv hyperv; 605 606 cpumask_var_t wbinvd_dirty_mask; 607 608 unsigned long last_retry_eip; 609 unsigned long last_retry_addr; 610 611 struct { 612 bool halted; 613 gfn_t gfns[roundup_pow_of_two(ASYNC_PF_PER_VCPU)]; 614 struct gfn_to_hva_cache data; 615 u64 msr_val; 616 u32 id; 617 bool send_user_only; 618 } apf; 619 620 /* OSVW MSRs (AMD only) */ 621 struct { 622 u64 length; 623 u64 status; 624 } osvw; 625 626 struct { 627 u64 msr_val; 628 struct gfn_to_hva_cache data; 629 } pv_eoi; 630 631 /* 632 * Indicate whether the access faults on its page table in guest 633 * which is set when fix page fault and used to detect unhandeable 634 * instruction. 635 */ 636 bool write_fault_to_shadow_pgtable; 637 638 /* set at EPT violation at this point */ 639 unsigned long exit_qualification; 640 641 /* pv related host specific info */ 642 struct { 643 bool pv_unhalted; 644 } pv; 645 646 int pending_ioapic_eoi; 647 int pending_external_vector; 648 }; 649 650 struct kvm_lpage_info { 651 int disallow_lpage; 652 }; 653 654 struct kvm_arch_memory_slot { 655 struct kvm_rmap_head *rmap[KVM_NR_PAGE_SIZES]; 656 struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1]; 657 unsigned short *gfn_track[KVM_PAGE_TRACK_MAX]; 658 }; 659 660 /* 661 * We use as the mode the number of bits allocated in the LDR for the 662 * logical processor ID. It happens that these are all powers of two. 663 * This makes it is very easy to detect cases where the APICs are 664 * configured for multiple modes; in that case, we cannot use the map and 665 * hence cannot use kvm_irq_delivery_to_apic_fast either. 666 */ 667 #define KVM_APIC_MODE_XAPIC_CLUSTER 4 668 #define KVM_APIC_MODE_XAPIC_FLAT 8 669 #define KVM_APIC_MODE_X2APIC 16 670 671 struct kvm_apic_map { 672 struct rcu_head rcu; 673 u8 mode; 674 struct kvm_lapic *phys_map[256]; 675 /* first index is cluster id second is cpu id in a cluster */ 676 struct kvm_lapic *logical_map[16][16]; 677 }; 678 679 /* Hyper-V emulation context */ 680 struct kvm_hv { 681 u64 hv_guest_os_id; 682 u64 hv_hypercall; 683 u64 hv_tsc_page; 684 685 /* Hyper-v based guest crash (NT kernel bugcheck) parameters */ 686 u64 hv_crash_param[HV_X64_MSR_CRASH_PARAMS]; 687 u64 hv_crash_ctl; 688 }; 689 690 struct kvm_arch { 691 unsigned int n_used_mmu_pages; 692 unsigned int n_requested_mmu_pages; 693 unsigned int n_max_mmu_pages; 694 unsigned int indirect_shadow_pages; 695 unsigned long mmu_valid_gen; 696 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES]; 697 /* 698 * Hash table of struct kvm_mmu_page. 699 */ 700 struct list_head active_mmu_pages; 701 struct list_head zapped_obsolete_pages; 702 struct kvm_page_track_notifier_node mmu_sp_tracker; 703 struct kvm_page_track_notifier_head track_notifier_head; 704 705 struct list_head assigned_dev_head; 706 struct iommu_domain *iommu_domain; 707 bool iommu_noncoherent; 708 #define __KVM_HAVE_ARCH_NONCOHERENT_DMA 709 atomic_t noncoherent_dma_count; 710 #define __KVM_HAVE_ARCH_ASSIGNED_DEVICE 711 atomic_t assigned_device_count; 712 struct kvm_pic *vpic; 713 struct kvm_ioapic *vioapic; 714 struct kvm_pit *vpit; 715 atomic_t vapics_in_nmi_mode; 716 struct mutex apic_map_lock; 717 struct kvm_apic_map *apic_map; 718 719 unsigned int tss_addr; 720 bool apic_access_page_done; 721 722 gpa_t wall_clock; 723 724 bool ept_identity_pagetable_done; 725 gpa_t ept_identity_map_addr; 726 727 unsigned long irq_sources_bitmap; 728 s64 kvmclock_offset; 729 raw_spinlock_t tsc_write_lock; 730 u64 last_tsc_nsec; 731 u64 last_tsc_write; 732 u32 last_tsc_khz; 733 u64 cur_tsc_nsec; 734 u64 cur_tsc_write; 735 u64 cur_tsc_offset; 736 u64 cur_tsc_generation; 737 int nr_vcpus_matched_tsc; 738 739 spinlock_t pvclock_gtod_sync_lock; 740 bool use_master_clock; 741 u64 master_kernel_ns; 742 cycle_t master_cycle_now; 743 struct delayed_work kvmclock_update_work; 744 struct delayed_work kvmclock_sync_work; 745 746 struct kvm_xen_hvm_config xen_hvm_config; 747 748 /* reads protected by irq_srcu, writes by irq_lock */ 749 struct hlist_head mask_notifier_list; 750 751 struct kvm_hv hyperv; 752 753 #ifdef CONFIG_KVM_MMU_AUDIT 754 int audit_point; 755 #endif 756 757 bool boot_vcpu_runs_old_kvmclock; 758 u32 bsp_vcpu_id; 759 760 u64 disabled_quirks; 761 762 bool irqchip_split; 763 u8 nr_reserved_ioapic_pins; 764 765 bool disabled_lapic_found; 766 }; 767 768 struct kvm_vm_stat { 769 u32 mmu_shadow_zapped; 770 u32 mmu_pte_write; 771 u32 mmu_pte_updated; 772 u32 mmu_pde_zapped; 773 u32 mmu_flooded; 774 u32 mmu_recycled; 775 u32 mmu_cache_miss; 776 u32 mmu_unsync; 777 u32 remote_tlb_flush; 778 u32 lpages; 779 }; 780 781 struct kvm_vcpu_stat { 782 u32 pf_fixed; 783 u32 pf_guest; 784 u32 tlb_flush; 785 u32 invlpg; 786 787 u32 exits; 788 u32 io_exits; 789 u32 mmio_exits; 790 u32 signal_exits; 791 u32 irq_window_exits; 792 u32 nmi_window_exits; 793 u32 halt_exits; 794 u32 halt_successful_poll; 795 u32 halt_attempted_poll; 796 u32 halt_wakeup; 797 u32 request_irq_exits; 798 u32 irq_exits; 799 u32 host_state_reload; 800 u32 efer_reload; 801 u32 fpu_reload; 802 u32 insn_emulation; 803 u32 insn_emulation_fail; 804 u32 hypercalls; 805 u32 irq_injections; 806 u32 nmi_injections; 807 }; 808 809 struct x86_instruction_info; 810 811 struct msr_data { 812 bool host_initiated; 813 u32 index; 814 u64 data; 815 }; 816 817 struct kvm_lapic_irq { 818 u32 vector; 819 u16 delivery_mode; 820 u16 dest_mode; 821 bool level; 822 u16 trig_mode; 823 u32 shorthand; 824 u32 dest_id; 825 bool msi_redir_hint; 826 }; 827 828 struct kvm_x86_ops { 829 int (*cpu_has_kvm_support)(void); /* __init */ 830 int (*disabled_by_bios)(void); /* __init */ 831 int (*hardware_enable)(void); 832 void (*hardware_disable)(void); 833 void (*check_processor_compatibility)(void *rtn); 834 int (*hardware_setup)(void); /* __init */ 835 void (*hardware_unsetup)(void); /* __exit */ 836 bool (*cpu_has_accelerated_tpr)(void); 837 bool (*cpu_has_high_real_mode_segbase)(void); 838 void (*cpuid_update)(struct kvm_vcpu *vcpu); 839 840 /* Create, but do not attach this VCPU */ 841 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id); 842 void (*vcpu_free)(struct kvm_vcpu *vcpu); 843 void (*vcpu_reset)(struct kvm_vcpu *vcpu, bool init_event); 844 845 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu); 846 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu); 847 void (*vcpu_put)(struct kvm_vcpu *vcpu); 848 849 void (*update_bp_intercept)(struct kvm_vcpu *vcpu); 850 int (*get_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr); 851 int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr); 852 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg); 853 void (*get_segment)(struct kvm_vcpu *vcpu, 854 struct kvm_segment *var, int seg); 855 int (*get_cpl)(struct kvm_vcpu *vcpu); 856 void (*set_segment)(struct kvm_vcpu *vcpu, 857 struct kvm_segment *var, int seg); 858 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l); 859 void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu); 860 void (*decache_cr3)(struct kvm_vcpu *vcpu); 861 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu); 862 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0); 863 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 864 int (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4); 865 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer); 866 void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 867 void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 868 void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 869 void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 870 u64 (*get_dr6)(struct kvm_vcpu *vcpu); 871 void (*set_dr6)(struct kvm_vcpu *vcpu, unsigned long value); 872 void (*sync_dirty_debug_regs)(struct kvm_vcpu *vcpu); 873 void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value); 874 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg); 875 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu); 876 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags); 877 void (*fpu_activate)(struct kvm_vcpu *vcpu); 878 void (*fpu_deactivate)(struct kvm_vcpu *vcpu); 879 880 void (*tlb_flush)(struct kvm_vcpu *vcpu); 881 882 void (*run)(struct kvm_vcpu *vcpu); 883 int (*handle_exit)(struct kvm_vcpu *vcpu); 884 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu); 885 void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 886 u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu); 887 void (*patch_hypercall)(struct kvm_vcpu *vcpu, 888 unsigned char *hypercall_addr); 889 void (*set_irq)(struct kvm_vcpu *vcpu); 890 void (*set_nmi)(struct kvm_vcpu *vcpu); 891 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr, 892 bool has_error_code, u32 error_code, 893 bool reinject); 894 void (*cancel_injection)(struct kvm_vcpu *vcpu); 895 int (*interrupt_allowed)(struct kvm_vcpu *vcpu); 896 int (*nmi_allowed)(struct kvm_vcpu *vcpu); 897 bool (*get_nmi_mask)(struct kvm_vcpu *vcpu); 898 void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked); 899 void (*enable_nmi_window)(struct kvm_vcpu *vcpu); 900 void (*enable_irq_window)(struct kvm_vcpu *vcpu); 901 void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr); 902 bool (*get_enable_apicv)(void); 903 void (*refresh_apicv_exec_ctrl)(struct kvm_vcpu *vcpu); 904 void (*hwapic_irr_update)(struct kvm_vcpu *vcpu, int max_irr); 905 void (*hwapic_isr_update)(struct kvm *kvm, int isr); 906 void (*load_eoi_exitmap)(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap); 907 void (*set_virtual_x2apic_mode)(struct kvm_vcpu *vcpu, bool set); 908 void (*set_apic_access_page_addr)(struct kvm_vcpu *vcpu, hpa_t hpa); 909 void (*deliver_posted_interrupt)(struct kvm_vcpu *vcpu, int vector); 910 void (*sync_pir_to_irr)(struct kvm_vcpu *vcpu); 911 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr); 912 int (*get_tdp_level)(void); 913 u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio); 914 int (*get_lpage_level)(void); 915 bool (*rdtscp_supported)(void); 916 bool (*invpcid_supported)(void); 917 void (*adjust_tsc_offset_guest)(struct kvm_vcpu *vcpu, s64 adjustment); 918 919 void (*set_tdp_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 920 921 void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry); 922 923 bool (*has_wbinvd_exit)(void); 924 925 u64 (*read_tsc_offset)(struct kvm_vcpu *vcpu); 926 void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset); 927 928 u64 (*read_l1_tsc)(struct kvm_vcpu *vcpu, u64 host_tsc); 929 930 void (*get_exit_info)(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2); 931 932 int (*check_intercept)(struct kvm_vcpu *vcpu, 933 struct x86_instruction_info *info, 934 enum x86_intercept_stage stage); 935 void (*handle_external_intr)(struct kvm_vcpu *vcpu); 936 bool (*mpx_supported)(void); 937 bool (*xsaves_supported)(void); 938 939 int (*check_nested_events)(struct kvm_vcpu *vcpu, bool external_intr); 940 941 void (*sched_in)(struct kvm_vcpu *kvm, int cpu); 942 943 /* 944 * Arch-specific dirty logging hooks. These hooks are only supposed to 945 * be valid if the specific arch has hardware-accelerated dirty logging 946 * mechanism. Currently only for PML on VMX. 947 * 948 * - slot_enable_log_dirty: 949 * called when enabling log dirty mode for the slot. 950 * - slot_disable_log_dirty: 951 * called when disabling log dirty mode for the slot. 952 * also called when slot is created with log dirty disabled. 953 * - flush_log_dirty: 954 * called before reporting dirty_bitmap to userspace. 955 * - enable_log_dirty_pt_masked: 956 * called when reenabling log dirty for the GFNs in the mask after 957 * corresponding bits are cleared in slot->dirty_bitmap. 958 */ 959 void (*slot_enable_log_dirty)(struct kvm *kvm, 960 struct kvm_memory_slot *slot); 961 void (*slot_disable_log_dirty)(struct kvm *kvm, 962 struct kvm_memory_slot *slot); 963 void (*flush_log_dirty)(struct kvm *kvm); 964 void (*enable_log_dirty_pt_masked)(struct kvm *kvm, 965 struct kvm_memory_slot *slot, 966 gfn_t offset, unsigned long mask); 967 /* pmu operations of sub-arch */ 968 const struct kvm_pmu_ops *pmu_ops; 969 970 /* 971 * Architecture specific hooks for vCPU blocking due to 972 * HLT instruction. 973 * Returns for .pre_block(): 974 * - 0 means continue to block the vCPU. 975 * - 1 means we cannot block the vCPU since some event 976 * happens during this period, such as, 'ON' bit in 977 * posted-interrupts descriptor is set. 978 */ 979 int (*pre_block)(struct kvm_vcpu *vcpu); 980 void (*post_block)(struct kvm_vcpu *vcpu); 981 int (*update_pi_irte)(struct kvm *kvm, unsigned int host_irq, 982 uint32_t guest_irq, bool set); 983 }; 984 985 struct kvm_arch_async_pf { 986 u32 token; 987 gfn_t gfn; 988 unsigned long cr3; 989 bool direct_map; 990 }; 991 992 extern struct kvm_x86_ops *kvm_x86_ops; 993 994 int kvm_mmu_module_init(void); 995 void kvm_mmu_module_exit(void); 996 997 void kvm_mmu_destroy(struct kvm_vcpu *vcpu); 998 int kvm_mmu_create(struct kvm_vcpu *vcpu); 999 void kvm_mmu_setup(struct kvm_vcpu *vcpu); 1000 void kvm_mmu_init_vm(struct kvm *kvm); 1001 void kvm_mmu_uninit_vm(struct kvm *kvm); 1002 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask, 1003 u64 dirty_mask, u64 nx_mask, u64 x_mask); 1004 1005 void kvm_mmu_reset_context(struct kvm_vcpu *vcpu); 1006 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, 1007 struct kvm_memory_slot *memslot); 1008 void kvm_mmu_zap_collapsible_sptes(struct kvm *kvm, 1009 const struct kvm_memory_slot *memslot); 1010 void kvm_mmu_slot_leaf_clear_dirty(struct kvm *kvm, 1011 struct kvm_memory_slot *memslot); 1012 void kvm_mmu_slot_largepage_remove_write_access(struct kvm *kvm, 1013 struct kvm_memory_slot *memslot); 1014 void kvm_mmu_slot_set_dirty(struct kvm *kvm, 1015 struct kvm_memory_slot *memslot); 1016 void kvm_mmu_clear_dirty_pt_masked(struct kvm *kvm, 1017 struct kvm_memory_slot *slot, 1018 gfn_t gfn_offset, unsigned long mask); 1019 void kvm_mmu_zap_all(struct kvm *kvm); 1020 void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm, struct kvm_memslots *slots); 1021 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm); 1022 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages); 1023 1024 int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3); 1025 1026 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, 1027 const void *val, int bytes); 1028 1029 struct kvm_irq_mask_notifier { 1030 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked); 1031 int irq; 1032 struct hlist_node link; 1033 }; 1034 1035 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, 1036 struct kvm_irq_mask_notifier *kimn); 1037 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, 1038 struct kvm_irq_mask_notifier *kimn); 1039 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin, 1040 bool mask); 1041 1042 extern bool tdp_enabled; 1043 1044 u64 vcpu_tsc_khz(struct kvm_vcpu *vcpu); 1045 1046 /* control of guest tsc rate supported? */ 1047 extern bool kvm_has_tsc_control; 1048 /* maximum supported tsc_khz for guests */ 1049 extern u32 kvm_max_guest_tsc_khz; 1050 /* number of bits of the fractional part of the TSC scaling ratio */ 1051 extern u8 kvm_tsc_scaling_ratio_frac_bits; 1052 /* maximum allowed value of TSC scaling ratio */ 1053 extern u64 kvm_max_tsc_scaling_ratio; 1054 1055 enum emulation_result { 1056 EMULATE_DONE, /* no further processing */ 1057 EMULATE_USER_EXIT, /* kvm_run ready for userspace exit */ 1058 EMULATE_FAIL, /* can't emulate this instruction */ 1059 }; 1060 1061 #define EMULTYPE_NO_DECODE (1 << 0) 1062 #define EMULTYPE_TRAP_UD (1 << 1) 1063 #define EMULTYPE_SKIP (1 << 2) 1064 #define EMULTYPE_RETRY (1 << 3) 1065 #define EMULTYPE_NO_REEXECUTE (1 << 4) 1066 int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2, 1067 int emulation_type, void *insn, int insn_len); 1068 1069 static inline int emulate_instruction(struct kvm_vcpu *vcpu, 1070 int emulation_type) 1071 { 1072 return x86_emulate_instruction(vcpu, 0, emulation_type, NULL, 0); 1073 } 1074 1075 void kvm_enable_efer_bits(u64); 1076 bool kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer); 1077 int kvm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr); 1078 int kvm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr); 1079 1080 struct x86_emulate_ctxt; 1081 1082 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port); 1083 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu); 1084 int kvm_emulate_halt(struct kvm_vcpu *vcpu); 1085 int kvm_vcpu_halt(struct kvm_vcpu *vcpu); 1086 int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu); 1087 1088 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); 1089 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg); 1090 void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector); 1091 1092 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index, 1093 int reason, bool has_error_code, u32 error_code); 1094 1095 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0); 1096 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3); 1097 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); 1098 int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8); 1099 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val); 1100 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val); 1101 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu); 1102 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw); 1103 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l); 1104 int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr); 1105 1106 int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr); 1107 int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr); 1108 1109 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu); 1110 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); 1111 bool kvm_rdpmc(struct kvm_vcpu *vcpu); 1112 1113 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr); 1114 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 1115 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr); 1116 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 1117 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault); 1118 int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, 1119 gfn_t gfn, void *data, int offset, int len, 1120 u32 access); 1121 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl); 1122 bool kvm_require_dr(struct kvm_vcpu *vcpu, int dr); 1123 1124 static inline int __kvm_irq_line_state(unsigned long *irq_state, 1125 int irq_source_id, int level) 1126 { 1127 /* Logical OR for level trig interrupt */ 1128 if (level) 1129 __set_bit(irq_source_id, irq_state); 1130 else 1131 __clear_bit(irq_source_id, irq_state); 1132 1133 return !!(*irq_state); 1134 } 1135 1136 int kvm_pic_set_irq(struct kvm_pic *pic, int irq, int irq_source_id, int level); 1137 void kvm_pic_clear_all(struct kvm_pic *pic, int irq_source_id); 1138 1139 void kvm_inject_nmi(struct kvm_vcpu *vcpu); 1140 1141 int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn); 1142 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva); 1143 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu); 1144 int kvm_mmu_load(struct kvm_vcpu *vcpu); 1145 void kvm_mmu_unload(struct kvm_vcpu *vcpu); 1146 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu); 1147 gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access, 1148 struct x86_exception *exception); 1149 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, 1150 struct x86_exception *exception); 1151 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, 1152 struct x86_exception *exception); 1153 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, 1154 struct x86_exception *exception); 1155 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, 1156 struct x86_exception *exception); 1157 1158 void kvm_vcpu_deactivate_apicv(struct kvm_vcpu *vcpu); 1159 1160 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu); 1161 1162 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code, 1163 void *insn, int insn_len); 1164 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva); 1165 void kvm_mmu_new_cr3(struct kvm_vcpu *vcpu); 1166 1167 void kvm_enable_tdp(void); 1168 void kvm_disable_tdp(void); 1169 1170 static inline gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access, 1171 struct x86_exception *exception) 1172 { 1173 return gpa; 1174 } 1175 1176 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page) 1177 { 1178 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT); 1179 1180 return (struct kvm_mmu_page *)page_private(page); 1181 } 1182 1183 static inline u16 kvm_read_ldt(void) 1184 { 1185 u16 ldt; 1186 asm("sldt %0" : "=g"(ldt)); 1187 return ldt; 1188 } 1189 1190 static inline void kvm_load_ldt(u16 sel) 1191 { 1192 asm("lldt %0" : : "rm"(sel)); 1193 } 1194 1195 #ifdef CONFIG_X86_64 1196 static inline unsigned long read_msr(unsigned long msr) 1197 { 1198 u64 value; 1199 1200 rdmsrl(msr, value); 1201 return value; 1202 } 1203 #endif 1204 1205 static inline u32 get_rdx_init_val(void) 1206 { 1207 return 0x600; /* P6 family */ 1208 } 1209 1210 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code) 1211 { 1212 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code); 1213 } 1214 1215 static inline u64 get_canonical(u64 la) 1216 { 1217 return ((int64_t)la << 16) >> 16; 1218 } 1219 1220 static inline bool is_noncanonical_address(u64 la) 1221 { 1222 #ifdef CONFIG_X86_64 1223 return get_canonical(la) != la; 1224 #else 1225 return false; 1226 #endif 1227 } 1228 1229 #define TSS_IOPB_BASE_OFFSET 0x66 1230 #define TSS_BASE_SIZE 0x68 1231 #define TSS_IOPB_SIZE (65536 / 8) 1232 #define TSS_REDIRECTION_SIZE (256 / 8) 1233 #define RMODE_TSS_SIZE \ 1234 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1) 1235 1236 enum { 1237 TASK_SWITCH_CALL = 0, 1238 TASK_SWITCH_IRET = 1, 1239 TASK_SWITCH_JMP = 2, 1240 TASK_SWITCH_GATE = 3, 1241 }; 1242 1243 #define HF_GIF_MASK (1 << 0) 1244 #define HF_HIF_MASK (1 << 1) 1245 #define HF_VINTR_MASK (1 << 2) 1246 #define HF_NMI_MASK (1 << 3) 1247 #define HF_IRET_MASK (1 << 4) 1248 #define HF_GUEST_MASK (1 << 5) /* VCPU is in guest-mode */ 1249 #define HF_SMM_MASK (1 << 6) 1250 #define HF_SMM_INSIDE_NMI_MASK (1 << 7) 1251 1252 #define __KVM_VCPU_MULTIPLE_ADDRESS_SPACE 1253 #define KVM_ADDRESS_SPACE_NUM 2 1254 1255 #define kvm_arch_vcpu_memslots_id(vcpu) ((vcpu)->arch.hflags & HF_SMM_MASK ? 1 : 0) 1256 #define kvm_memslots_for_spte_role(kvm, role) __kvm_memslots(kvm, (role).smm) 1257 1258 /* 1259 * Hardware virtualization extension instructions may fault if a 1260 * reboot turns off virtualization while processes are running. 1261 * Trap the fault and ignore the instruction if that happens. 1262 */ 1263 asmlinkage void kvm_spurious_fault(void); 1264 1265 #define ____kvm_handle_fault_on_reboot(insn, cleanup_insn) \ 1266 "666: " insn "\n\t" \ 1267 "668: \n\t" \ 1268 ".pushsection .fixup, \"ax\" \n" \ 1269 "667: \n\t" \ 1270 cleanup_insn "\n\t" \ 1271 "cmpb $0, kvm_rebooting \n\t" \ 1272 "jne 668b \n\t" \ 1273 __ASM_SIZE(push) " $666b \n\t" \ 1274 "call kvm_spurious_fault \n\t" \ 1275 ".popsection \n\t" \ 1276 _ASM_EXTABLE(666b, 667b) 1277 1278 #define __kvm_handle_fault_on_reboot(insn) \ 1279 ____kvm_handle_fault_on_reboot(insn, "") 1280 1281 #define KVM_ARCH_WANT_MMU_NOTIFIER 1282 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 1283 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end); 1284 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end); 1285 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); 1286 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 1287 int kvm_cpu_has_injectable_intr(struct kvm_vcpu *v); 1288 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu); 1289 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu); 1290 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 1291 void kvm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event); 1292 void kvm_vcpu_reload_apic_access_page(struct kvm_vcpu *vcpu); 1293 void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm, 1294 unsigned long address); 1295 1296 void kvm_define_shared_msr(unsigned index, u32 msr); 1297 int kvm_set_shared_msr(unsigned index, u64 val, u64 mask); 1298 1299 u64 kvm_scale_tsc(struct kvm_vcpu *vcpu, u64 tsc); 1300 u64 kvm_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc); 1301 1302 unsigned long kvm_get_linear_rip(struct kvm_vcpu *vcpu); 1303 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip); 1304 1305 void kvm_make_mclock_inprogress_request(struct kvm *kvm); 1306 void kvm_make_scan_ioapic_request(struct kvm *kvm); 1307 1308 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, 1309 struct kvm_async_pf *work); 1310 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, 1311 struct kvm_async_pf *work); 1312 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, 1313 struct kvm_async_pf *work); 1314 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu); 1315 extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn); 1316 1317 void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err); 1318 1319 int kvm_is_in_guest(void); 1320 1321 int __x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size); 1322 int x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size); 1323 bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu); 1324 bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu); 1325 1326 bool kvm_intr_is_single_vcpu(struct kvm *kvm, struct kvm_lapic_irq *irq, 1327 struct kvm_vcpu **dest_vcpu); 1328 1329 void kvm_set_msi_irq(struct kvm_kernel_irq_routing_entry *e, 1330 struct kvm_lapic_irq *irq); 1331 1332 static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {} 1333 static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {} 1334 1335 #endif /* _ASM_X86_KVM_HOST_H */ 1336