1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Kernel-based Virtual Machine driver for Linux 4 * 5 * This header defines architecture specific interfaces, x86 version 6 */ 7 8 #ifndef _ASM_X86_KVM_HOST_H 9 #define _ASM_X86_KVM_HOST_H 10 11 #include <linux/types.h> 12 #include <linux/mm.h> 13 #include <linux/mmu_notifier.h> 14 #include <linux/tracepoint.h> 15 #include <linux/cpumask.h> 16 #include <linux/irq_work.h> 17 #include <linux/irq.h> 18 19 #include <linux/kvm.h> 20 #include <linux/kvm_para.h> 21 #include <linux/kvm_types.h> 22 #include <linux/perf_event.h> 23 #include <linux/pvclock_gtod.h> 24 #include <linux/clocksource.h> 25 #include <linux/irqbypass.h> 26 #include <linux/hyperv.h> 27 28 #include <asm/apic.h> 29 #include <asm/pvclock-abi.h> 30 #include <asm/desc.h> 31 #include <asm/mtrr.h> 32 #include <asm/msr-index.h> 33 #include <asm/asm.h> 34 #include <asm/kvm_page_track.h> 35 #include <asm/kvm_vcpu_regs.h> 36 #include <asm/hyperv-tlfs.h> 37 38 #define __KVM_HAVE_ARCH_VCPU_DEBUGFS 39 40 #define KVM_MAX_VCPUS 1024 41 #define KVM_SOFT_MAX_VCPUS 710 42 43 /* 44 * In x86, the VCPU ID corresponds to the APIC ID, and APIC IDs 45 * might be larger than the actual number of VCPUs because the 46 * APIC ID encodes CPU topology information. 47 * 48 * In the worst case, we'll need less than one extra bit for the 49 * Core ID, and less than one extra bit for the Package (Die) ID, 50 * so ratio of 4 should be enough. 51 */ 52 #define KVM_VCPU_ID_RATIO 4 53 #define KVM_MAX_VCPU_ID (KVM_MAX_VCPUS * KVM_VCPU_ID_RATIO) 54 55 /* memory slots that are not exposed to userspace */ 56 #define KVM_PRIVATE_MEM_SLOTS 3 57 58 #define KVM_HALT_POLL_NS_DEFAULT 200000 59 60 #define KVM_IRQCHIP_NUM_PINS KVM_IOAPIC_NUM_PINS 61 62 #define KVM_DIRTY_LOG_MANUAL_CAPS (KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE | \ 63 KVM_DIRTY_LOG_INITIALLY_SET) 64 65 #define KVM_BUS_LOCK_DETECTION_VALID_MODE (KVM_BUS_LOCK_DETECTION_OFF | \ 66 KVM_BUS_LOCK_DETECTION_EXIT) 67 68 /* x86-specific vcpu->requests bit members */ 69 #define KVM_REQ_MIGRATE_TIMER KVM_ARCH_REQ(0) 70 #define KVM_REQ_REPORT_TPR_ACCESS KVM_ARCH_REQ(1) 71 #define KVM_REQ_TRIPLE_FAULT KVM_ARCH_REQ(2) 72 #define KVM_REQ_MMU_SYNC KVM_ARCH_REQ(3) 73 #define KVM_REQ_CLOCK_UPDATE KVM_ARCH_REQ(4) 74 #define KVM_REQ_LOAD_MMU_PGD KVM_ARCH_REQ(5) 75 #define KVM_REQ_EVENT KVM_ARCH_REQ(6) 76 #define KVM_REQ_APF_HALT KVM_ARCH_REQ(7) 77 #define KVM_REQ_STEAL_UPDATE KVM_ARCH_REQ(8) 78 #define KVM_REQ_NMI KVM_ARCH_REQ(9) 79 #define KVM_REQ_PMU KVM_ARCH_REQ(10) 80 #define KVM_REQ_PMI KVM_ARCH_REQ(11) 81 #define KVM_REQ_SMI KVM_ARCH_REQ(12) 82 #define KVM_REQ_MASTERCLOCK_UPDATE KVM_ARCH_REQ(13) 83 #define KVM_REQ_MCLOCK_INPROGRESS \ 84 KVM_ARCH_REQ_FLAGS(14, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) 85 #define KVM_REQ_SCAN_IOAPIC \ 86 KVM_ARCH_REQ_FLAGS(15, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) 87 #define KVM_REQ_GLOBAL_CLOCK_UPDATE KVM_ARCH_REQ(16) 88 #define KVM_REQ_APIC_PAGE_RELOAD \ 89 KVM_ARCH_REQ_FLAGS(17, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) 90 #define KVM_REQ_HV_CRASH KVM_ARCH_REQ(18) 91 #define KVM_REQ_IOAPIC_EOI_EXIT KVM_ARCH_REQ(19) 92 #define KVM_REQ_HV_RESET KVM_ARCH_REQ(20) 93 #define KVM_REQ_HV_EXIT KVM_ARCH_REQ(21) 94 #define KVM_REQ_HV_STIMER KVM_ARCH_REQ(22) 95 #define KVM_REQ_LOAD_EOI_EXITMAP KVM_ARCH_REQ(23) 96 #define KVM_REQ_GET_NESTED_STATE_PAGES KVM_ARCH_REQ(24) 97 #define KVM_REQ_APICV_UPDATE \ 98 KVM_ARCH_REQ_FLAGS(25, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) 99 #define KVM_REQ_TLB_FLUSH_CURRENT KVM_ARCH_REQ(26) 100 #define KVM_REQ_TLB_FLUSH_GUEST \ 101 KVM_ARCH_REQ_FLAGS(27, KVM_REQUEST_NO_WAKEUP) 102 #define KVM_REQ_APF_READY KVM_ARCH_REQ(28) 103 #define KVM_REQ_MSR_FILTER_CHANGED KVM_ARCH_REQ(29) 104 #define KVM_REQ_UPDATE_CPU_DIRTY_LOGGING \ 105 KVM_ARCH_REQ_FLAGS(30, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) 106 107 #define CR0_RESERVED_BITS \ 108 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ 109 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ 110 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) 111 112 #define CR4_RESERVED_BITS \ 113 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ 114 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ 115 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR | X86_CR4_PCIDE \ 116 | X86_CR4_OSXSAVE | X86_CR4_SMEP | X86_CR4_FSGSBASE \ 117 | X86_CR4_OSXMMEXCPT | X86_CR4_LA57 | X86_CR4_VMXE \ 118 | X86_CR4_SMAP | X86_CR4_PKE | X86_CR4_UMIP)) 119 120 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) 121 122 123 124 #define INVALID_PAGE (~(hpa_t)0) 125 #define VALID_PAGE(x) ((x) != INVALID_PAGE) 126 127 #define UNMAPPED_GVA (~(gpa_t)0) 128 #define INVALID_GPA (~(gpa_t)0) 129 130 /* KVM Hugepage definitions for x86 */ 131 #define KVM_MAX_HUGEPAGE_LEVEL PG_LEVEL_1G 132 #define KVM_NR_PAGE_SIZES (KVM_MAX_HUGEPAGE_LEVEL - PG_LEVEL_4K + 1) 133 #define KVM_HPAGE_GFN_SHIFT(x) (((x) - 1) * 9) 134 #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + KVM_HPAGE_GFN_SHIFT(x)) 135 #define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x)) 136 #define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1)) 137 #define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE) 138 139 #define KVM_PERMILLE_MMU_PAGES 20 140 #define KVM_MIN_ALLOC_MMU_PAGES 64UL 141 #define KVM_MMU_HASH_SHIFT 12 142 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT) 143 #define KVM_MIN_FREE_MMU_PAGES 5 144 #define KVM_REFILL_PAGES 25 145 #define KVM_MAX_CPUID_ENTRIES 256 146 #define KVM_NR_FIXED_MTRR_REGION 88 147 #define KVM_NR_VAR_MTRR 8 148 149 #define ASYNC_PF_PER_VCPU 64 150 151 enum kvm_reg { 152 VCPU_REGS_RAX = __VCPU_REGS_RAX, 153 VCPU_REGS_RCX = __VCPU_REGS_RCX, 154 VCPU_REGS_RDX = __VCPU_REGS_RDX, 155 VCPU_REGS_RBX = __VCPU_REGS_RBX, 156 VCPU_REGS_RSP = __VCPU_REGS_RSP, 157 VCPU_REGS_RBP = __VCPU_REGS_RBP, 158 VCPU_REGS_RSI = __VCPU_REGS_RSI, 159 VCPU_REGS_RDI = __VCPU_REGS_RDI, 160 #ifdef CONFIG_X86_64 161 VCPU_REGS_R8 = __VCPU_REGS_R8, 162 VCPU_REGS_R9 = __VCPU_REGS_R9, 163 VCPU_REGS_R10 = __VCPU_REGS_R10, 164 VCPU_REGS_R11 = __VCPU_REGS_R11, 165 VCPU_REGS_R12 = __VCPU_REGS_R12, 166 VCPU_REGS_R13 = __VCPU_REGS_R13, 167 VCPU_REGS_R14 = __VCPU_REGS_R14, 168 VCPU_REGS_R15 = __VCPU_REGS_R15, 169 #endif 170 VCPU_REGS_RIP, 171 NR_VCPU_REGS, 172 173 VCPU_EXREG_PDPTR = NR_VCPU_REGS, 174 VCPU_EXREG_CR0, 175 VCPU_EXREG_CR3, 176 VCPU_EXREG_CR4, 177 VCPU_EXREG_RFLAGS, 178 VCPU_EXREG_SEGMENTS, 179 VCPU_EXREG_EXIT_INFO_1, 180 VCPU_EXREG_EXIT_INFO_2, 181 }; 182 183 enum { 184 VCPU_SREG_ES, 185 VCPU_SREG_CS, 186 VCPU_SREG_SS, 187 VCPU_SREG_DS, 188 VCPU_SREG_FS, 189 VCPU_SREG_GS, 190 VCPU_SREG_TR, 191 VCPU_SREG_LDTR, 192 }; 193 194 enum exit_fastpath_completion { 195 EXIT_FASTPATH_NONE, 196 EXIT_FASTPATH_REENTER_GUEST, 197 EXIT_FASTPATH_EXIT_HANDLED, 198 }; 199 typedef enum exit_fastpath_completion fastpath_t; 200 201 struct x86_emulate_ctxt; 202 struct x86_exception; 203 enum x86_intercept; 204 enum x86_intercept_stage; 205 206 #define KVM_NR_DB_REGS 4 207 208 #define DR6_BUS_LOCK (1 << 11) 209 #define DR6_BD (1 << 13) 210 #define DR6_BS (1 << 14) 211 #define DR6_BT (1 << 15) 212 #define DR6_RTM (1 << 16) 213 /* 214 * DR6_ACTIVE_LOW combines fixed-1 and active-low bits. 215 * We can regard all the bits in DR6_FIXED_1 as active_low bits; 216 * they will never be 0 for now, but when they are defined 217 * in the future it will require no code change. 218 * 219 * DR6_ACTIVE_LOW is also used as the init/reset value for DR6. 220 */ 221 #define DR6_ACTIVE_LOW 0xffff0ff0 222 #define DR6_VOLATILE 0x0001e80f 223 #define DR6_FIXED_1 (DR6_ACTIVE_LOW & ~DR6_VOLATILE) 224 225 #define DR7_BP_EN_MASK 0x000000ff 226 #define DR7_GE (1 << 9) 227 #define DR7_GD (1 << 13) 228 #define DR7_FIXED_1 0x00000400 229 #define DR7_VOLATILE 0xffff2bff 230 231 #define KVM_GUESTDBG_VALID_MASK \ 232 (KVM_GUESTDBG_ENABLE | \ 233 KVM_GUESTDBG_SINGLESTEP | \ 234 KVM_GUESTDBG_USE_HW_BP | \ 235 KVM_GUESTDBG_USE_SW_BP | \ 236 KVM_GUESTDBG_INJECT_BP | \ 237 KVM_GUESTDBG_INJECT_DB | \ 238 KVM_GUESTDBG_BLOCKIRQ) 239 240 241 #define PFERR_PRESENT_BIT 0 242 #define PFERR_WRITE_BIT 1 243 #define PFERR_USER_BIT 2 244 #define PFERR_RSVD_BIT 3 245 #define PFERR_FETCH_BIT 4 246 #define PFERR_PK_BIT 5 247 #define PFERR_SGX_BIT 15 248 #define PFERR_GUEST_FINAL_BIT 32 249 #define PFERR_GUEST_PAGE_BIT 33 250 251 #define PFERR_PRESENT_MASK (1U << PFERR_PRESENT_BIT) 252 #define PFERR_WRITE_MASK (1U << PFERR_WRITE_BIT) 253 #define PFERR_USER_MASK (1U << PFERR_USER_BIT) 254 #define PFERR_RSVD_MASK (1U << PFERR_RSVD_BIT) 255 #define PFERR_FETCH_MASK (1U << PFERR_FETCH_BIT) 256 #define PFERR_PK_MASK (1U << PFERR_PK_BIT) 257 #define PFERR_SGX_MASK (1U << PFERR_SGX_BIT) 258 #define PFERR_GUEST_FINAL_MASK (1ULL << PFERR_GUEST_FINAL_BIT) 259 #define PFERR_GUEST_PAGE_MASK (1ULL << PFERR_GUEST_PAGE_BIT) 260 261 #define PFERR_NESTED_GUEST_PAGE (PFERR_GUEST_PAGE_MASK | \ 262 PFERR_WRITE_MASK | \ 263 PFERR_PRESENT_MASK) 264 265 /* apic attention bits */ 266 #define KVM_APIC_CHECK_VAPIC 0 267 /* 268 * The following bit is set with PV-EOI, unset on EOI. 269 * We detect PV-EOI changes by guest by comparing 270 * this bit with PV-EOI in guest memory. 271 * See the implementation in apic_update_pv_eoi. 272 */ 273 #define KVM_APIC_PV_EOI_PENDING 1 274 275 struct kvm_kernel_irq_routing_entry; 276 277 /* 278 * kvm_mmu_page_role tracks the properties of a shadow page (where shadow page 279 * also includes TDP pages) to determine whether or not a page can be used in 280 * the given MMU context. This is a subset of the overall kvm_mmu_role to 281 * minimize the size of kvm_memory_slot.arch.gfn_track, i.e. allows allocating 282 * 2 bytes per gfn instead of 4 bytes per gfn. 283 * 284 * Indirect upper-level shadow pages are tracked for write-protection via 285 * gfn_track. As above, gfn_track is a 16 bit counter, so KVM must not create 286 * more than 2^16-1 upper-level shadow pages at a single gfn, otherwise 287 * gfn_track will overflow and explosions will ensure. 288 * 289 * A unique shadow page (SP) for a gfn is created if and only if an existing SP 290 * cannot be reused. The ability to reuse a SP is tracked by its role, which 291 * incorporates various mode bits and properties of the SP. Roughly speaking, 292 * the number of unique SPs that can theoretically be created is 2^n, where n 293 * is the number of bits that are used to compute the role. 294 * 295 * But, even though there are 18 bits in the mask below, not all combinations 296 * of modes and flags are possible. The maximum number of possible upper-level 297 * shadow pages for a single gfn is in the neighborhood of 2^13. 298 * 299 * - invalid shadow pages are not accounted. 300 * - level is effectively limited to four combinations, not 16 as the number 301 * bits would imply, as 4k SPs are not tracked (allowed to go unsync). 302 * - level is effectively unused for non-PAE paging because there is exactly 303 * one upper level (see 4k SP exception above). 304 * - quadrant is used only for non-PAE paging and is exclusive with 305 * gpte_is_8_bytes. 306 * - execonly and ad_disabled are used only for nested EPT, which makes it 307 * exclusive with quadrant. 308 */ 309 union kvm_mmu_page_role { 310 u32 word; 311 struct { 312 unsigned level:4; 313 unsigned gpte_is_8_bytes:1; 314 unsigned quadrant:2; 315 unsigned direct:1; 316 unsigned access:3; 317 unsigned invalid:1; 318 unsigned efer_nx:1; 319 unsigned cr0_wp:1; 320 unsigned smep_andnot_wp:1; 321 unsigned smap_andnot_wp:1; 322 unsigned ad_disabled:1; 323 unsigned guest_mode:1; 324 unsigned :6; 325 326 /* 327 * This is left at the top of the word so that 328 * kvm_memslots_for_spte_role can extract it with a 329 * simple shift. While there is room, give it a whole 330 * byte so it is also faster to load it from memory. 331 */ 332 unsigned smm:8; 333 }; 334 }; 335 336 /* 337 * kvm_mmu_extended_role complements kvm_mmu_page_role, tracking properties 338 * relevant to the current MMU configuration. When loading CR0, CR4, or EFER, 339 * including on nested transitions, if nothing in the full role changes then 340 * MMU re-configuration can be skipped. @valid bit is set on first usage so we 341 * don't treat all-zero structure as valid data. 342 * 343 * The properties that are tracked in the extended role but not the page role 344 * are for things that either (a) do not affect the validity of the shadow page 345 * or (b) are indirectly reflected in the shadow page's role. For example, 346 * CR4.PKE only affects permission checks for software walks of the guest page 347 * tables (because KVM doesn't support Protection Keys with shadow paging), and 348 * CR0.PG, CR4.PAE, and CR4.PSE are indirectly reflected in role.level. 349 * 350 * Note, SMEP and SMAP are not redundant with sm*p_andnot_wp in the page role. 351 * If CR0.WP=1, KVM can reuse shadow pages for the guest regardless of SMEP and 352 * SMAP, but the MMU's permission checks for software walks need to be SMEP and 353 * SMAP aware regardless of CR0.WP. 354 */ 355 union kvm_mmu_extended_role { 356 u32 word; 357 struct { 358 unsigned int valid:1; 359 unsigned int execonly:1; 360 unsigned int cr0_pg:1; 361 unsigned int cr4_pae:1; 362 unsigned int cr4_pse:1; 363 unsigned int cr4_pke:1; 364 unsigned int cr4_smap:1; 365 unsigned int cr4_smep:1; 366 unsigned int cr4_la57:1; 367 }; 368 }; 369 370 union kvm_mmu_role { 371 u64 as_u64; 372 struct { 373 union kvm_mmu_page_role base; 374 union kvm_mmu_extended_role ext; 375 }; 376 }; 377 378 struct kvm_rmap_head { 379 unsigned long val; 380 }; 381 382 struct kvm_pio_request { 383 unsigned long linear_rip; 384 unsigned long count; 385 int in; 386 int port; 387 int size; 388 }; 389 390 #define PT64_ROOT_MAX_LEVEL 5 391 392 struct rsvd_bits_validate { 393 u64 rsvd_bits_mask[2][PT64_ROOT_MAX_LEVEL]; 394 u64 bad_mt_xwr; 395 }; 396 397 struct kvm_mmu_root_info { 398 gpa_t pgd; 399 hpa_t hpa; 400 }; 401 402 #define KVM_MMU_ROOT_INFO_INVALID \ 403 ((struct kvm_mmu_root_info) { .pgd = INVALID_PAGE, .hpa = INVALID_PAGE }) 404 405 #define KVM_MMU_NUM_PREV_ROOTS 3 406 407 #define KVM_HAVE_MMU_RWLOCK 408 409 struct kvm_mmu_page; 410 411 /* 412 * x86 supports 4 paging modes (5-level 64-bit, 4-level 64-bit, 3-level 32-bit, 413 * and 2-level 32-bit). The kvm_mmu structure abstracts the details of the 414 * current mmu mode. 415 */ 416 struct kvm_mmu { 417 unsigned long (*get_guest_pgd)(struct kvm_vcpu *vcpu); 418 u64 (*get_pdptr)(struct kvm_vcpu *vcpu, int index); 419 int (*page_fault)(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u32 err, 420 bool prefault); 421 void (*inject_page_fault)(struct kvm_vcpu *vcpu, 422 struct x86_exception *fault); 423 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gpa_t gva_or_gpa, 424 u32 access, struct x86_exception *exception); 425 gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access, 426 struct x86_exception *exception); 427 int (*sync_page)(struct kvm_vcpu *vcpu, 428 struct kvm_mmu_page *sp); 429 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva, hpa_t root_hpa); 430 hpa_t root_hpa; 431 gpa_t root_pgd; 432 union kvm_mmu_role mmu_role; 433 u8 root_level; 434 u8 shadow_root_level; 435 u8 ept_ad; 436 bool direct_map; 437 struct kvm_mmu_root_info prev_roots[KVM_MMU_NUM_PREV_ROOTS]; 438 439 /* 440 * Bitmap; bit set = permission fault 441 * Byte index: page fault error code [4:1] 442 * Bit index: pte permissions in ACC_* format 443 */ 444 u8 permissions[16]; 445 446 /* 447 * The pkru_mask indicates if protection key checks are needed. It 448 * consists of 16 domains indexed by page fault error code bits [4:1], 449 * with PFEC.RSVD replaced by ACC_USER_MASK from the page tables. 450 * Each domain has 2 bits which are ANDed with AD and WD from PKRU. 451 */ 452 u32 pkru_mask; 453 454 u64 *pae_root; 455 u64 *pml4_root; 456 u64 *pml5_root; 457 458 /* 459 * check zero bits on shadow page table entries, these 460 * bits include not only hardware reserved bits but also 461 * the bits spte never used. 462 */ 463 struct rsvd_bits_validate shadow_zero_check; 464 465 struct rsvd_bits_validate guest_rsvd_check; 466 467 u64 pdptrs[4]; /* pae */ 468 }; 469 470 struct kvm_tlb_range { 471 u64 start_gfn; 472 u64 pages; 473 }; 474 475 enum pmc_type { 476 KVM_PMC_GP = 0, 477 KVM_PMC_FIXED, 478 }; 479 480 struct kvm_pmc { 481 enum pmc_type type; 482 u8 idx; 483 u64 counter; 484 u64 eventsel; 485 struct perf_event *perf_event; 486 struct kvm_vcpu *vcpu; 487 /* 488 * eventsel value for general purpose counters, 489 * ctrl value for fixed counters. 490 */ 491 u64 current_config; 492 bool is_paused; 493 }; 494 495 struct kvm_pmu { 496 unsigned nr_arch_gp_counters; 497 unsigned nr_arch_fixed_counters; 498 unsigned available_event_types; 499 u64 fixed_ctr_ctrl; 500 u64 global_ctrl; 501 u64 global_status; 502 u64 global_ovf_ctrl; 503 u64 counter_bitmask[2]; 504 u64 global_ctrl_mask; 505 u64 global_ovf_ctrl_mask; 506 u64 reserved_bits; 507 u8 version; 508 struct kvm_pmc gp_counters[INTEL_PMC_MAX_GENERIC]; 509 struct kvm_pmc fixed_counters[INTEL_PMC_MAX_FIXED]; 510 struct irq_work irq_work; 511 DECLARE_BITMAP(reprogram_pmi, X86_PMC_IDX_MAX); 512 DECLARE_BITMAP(all_valid_pmc_idx, X86_PMC_IDX_MAX); 513 DECLARE_BITMAP(pmc_in_use, X86_PMC_IDX_MAX); 514 515 /* 516 * The gate to release perf_events not marked in 517 * pmc_in_use only once in a vcpu time slice. 518 */ 519 bool need_cleanup; 520 521 /* 522 * The total number of programmed perf_events and it helps to avoid 523 * redundant check before cleanup if guest don't use vPMU at all. 524 */ 525 u8 event_count; 526 }; 527 528 struct kvm_pmu_ops; 529 530 enum { 531 KVM_DEBUGREG_BP_ENABLED = 1, 532 KVM_DEBUGREG_WONT_EXIT = 2, 533 }; 534 535 struct kvm_mtrr_range { 536 u64 base; 537 u64 mask; 538 struct list_head node; 539 }; 540 541 struct kvm_mtrr { 542 struct kvm_mtrr_range var_ranges[KVM_NR_VAR_MTRR]; 543 mtrr_type fixed_ranges[KVM_NR_FIXED_MTRR_REGION]; 544 u64 deftype; 545 546 struct list_head head; 547 }; 548 549 /* Hyper-V SynIC timer */ 550 struct kvm_vcpu_hv_stimer { 551 struct hrtimer timer; 552 int index; 553 union hv_stimer_config config; 554 u64 count; 555 u64 exp_time; 556 struct hv_message msg; 557 bool msg_pending; 558 }; 559 560 /* Hyper-V synthetic interrupt controller (SynIC)*/ 561 struct kvm_vcpu_hv_synic { 562 u64 version; 563 u64 control; 564 u64 msg_page; 565 u64 evt_page; 566 atomic64_t sint[HV_SYNIC_SINT_COUNT]; 567 atomic_t sint_to_gsi[HV_SYNIC_SINT_COUNT]; 568 DECLARE_BITMAP(auto_eoi_bitmap, 256); 569 DECLARE_BITMAP(vec_bitmap, 256); 570 bool active; 571 bool dont_zero_synic_pages; 572 }; 573 574 /* Hyper-V per vcpu emulation context */ 575 struct kvm_vcpu_hv { 576 struct kvm_vcpu *vcpu; 577 u32 vp_index; 578 u64 hv_vapic; 579 s64 runtime_offset; 580 struct kvm_vcpu_hv_synic synic; 581 struct kvm_hyperv_exit exit; 582 struct kvm_vcpu_hv_stimer stimer[HV_SYNIC_STIMER_COUNT]; 583 DECLARE_BITMAP(stimer_pending_bitmap, HV_SYNIC_STIMER_COUNT); 584 cpumask_t tlb_flush; 585 bool enforce_cpuid; 586 struct { 587 u32 features_eax; /* HYPERV_CPUID_FEATURES.EAX */ 588 u32 features_ebx; /* HYPERV_CPUID_FEATURES.EBX */ 589 u32 features_edx; /* HYPERV_CPUID_FEATURES.EDX */ 590 u32 enlightenments_eax; /* HYPERV_CPUID_ENLIGHTMENT_INFO.EAX */ 591 u32 enlightenments_ebx; /* HYPERV_CPUID_ENLIGHTMENT_INFO.EBX */ 592 u32 syndbg_cap_eax; /* HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES.EAX */ 593 } cpuid_cache; 594 }; 595 596 /* Xen HVM per vcpu emulation context */ 597 struct kvm_vcpu_xen { 598 u64 hypercall_rip; 599 u32 current_runstate; 600 bool vcpu_info_set; 601 bool vcpu_time_info_set; 602 bool runstate_set; 603 struct gfn_to_hva_cache vcpu_info_cache; 604 struct gfn_to_hva_cache vcpu_time_info_cache; 605 struct gfn_to_hva_cache runstate_cache; 606 u64 last_steal; 607 u64 runstate_entry_time; 608 u64 runstate_times[4]; 609 }; 610 611 struct kvm_vcpu_arch { 612 /* 613 * rip and regs accesses must go through 614 * kvm_{register,rip}_{read,write} functions. 615 */ 616 unsigned long regs[NR_VCPU_REGS]; 617 u32 regs_avail; 618 u32 regs_dirty; 619 620 unsigned long cr0; 621 unsigned long cr0_guest_owned_bits; 622 unsigned long cr2; 623 unsigned long cr3; 624 unsigned long cr4; 625 unsigned long cr4_guest_owned_bits; 626 unsigned long cr4_guest_rsvd_bits; 627 unsigned long cr8; 628 u32 host_pkru; 629 u32 pkru; 630 u32 hflags; 631 u64 efer; 632 u64 apic_base; 633 struct kvm_lapic *apic; /* kernel irqchip context */ 634 bool apicv_active; 635 bool load_eoi_exitmap_pending; 636 DECLARE_BITMAP(ioapic_handled_vectors, 256); 637 unsigned long apic_attention; 638 int32_t apic_arb_prio; 639 int mp_state; 640 u64 ia32_misc_enable_msr; 641 u64 smbase; 642 u64 smi_count; 643 bool tpr_access_reporting; 644 bool xsaves_enabled; 645 u64 ia32_xss; 646 u64 microcode_version; 647 u64 arch_capabilities; 648 u64 perf_capabilities; 649 650 /* 651 * Paging state of the vcpu 652 * 653 * If the vcpu runs in guest mode with two level paging this still saves 654 * the paging mode of the l1 guest. This context is always used to 655 * handle faults. 656 */ 657 struct kvm_mmu *mmu; 658 659 /* Non-nested MMU for L1 */ 660 struct kvm_mmu root_mmu; 661 662 /* L1 MMU when running nested */ 663 struct kvm_mmu guest_mmu; 664 665 /* 666 * Paging state of an L2 guest (used for nested npt) 667 * 668 * This context will save all necessary information to walk page tables 669 * of an L2 guest. This context is only initialized for page table 670 * walking and not for faulting since we never handle l2 page faults on 671 * the host. 672 */ 673 struct kvm_mmu nested_mmu; 674 675 /* 676 * Pointer to the mmu context currently used for 677 * gva_to_gpa translations. 678 */ 679 struct kvm_mmu *walk_mmu; 680 681 struct kvm_mmu_memory_cache mmu_pte_list_desc_cache; 682 struct kvm_mmu_memory_cache mmu_shadow_page_cache; 683 struct kvm_mmu_memory_cache mmu_gfn_array_cache; 684 struct kvm_mmu_memory_cache mmu_page_header_cache; 685 686 /* 687 * QEMU userspace and the guest each have their own FPU state. 688 * In vcpu_run, we switch between the user and guest FPU contexts. 689 * While running a VCPU, the VCPU thread will have the guest FPU 690 * context. 691 * 692 * Note that while the PKRU state lives inside the fpu registers, 693 * it is switched out separately at VMENTER and VMEXIT time. The 694 * "guest_fpu" state here contains the guest FPU context, with the 695 * host PRKU bits. 696 */ 697 struct fpu *user_fpu; 698 struct fpu *guest_fpu; 699 700 u64 xcr0; 701 u64 guest_supported_xcr0; 702 703 struct kvm_pio_request pio; 704 void *pio_data; 705 void *sev_pio_data; 706 unsigned sev_pio_count; 707 708 u8 event_exit_inst_len; 709 710 struct kvm_queued_exception { 711 bool pending; 712 bool injected; 713 bool has_error_code; 714 u8 nr; 715 u32 error_code; 716 unsigned long payload; 717 bool has_payload; 718 u8 nested_apf; 719 } exception; 720 721 struct kvm_queued_interrupt { 722 bool injected; 723 bool soft; 724 u8 nr; 725 } interrupt; 726 727 int halt_request; /* real mode on Intel only */ 728 729 int cpuid_nent; 730 struct kvm_cpuid_entry2 *cpuid_entries; 731 732 u64 reserved_gpa_bits; 733 int maxphyaddr; 734 735 /* emulate context */ 736 737 struct x86_emulate_ctxt *emulate_ctxt; 738 bool emulate_regs_need_sync_to_vcpu; 739 bool emulate_regs_need_sync_from_vcpu; 740 int (*complete_userspace_io)(struct kvm_vcpu *vcpu); 741 742 gpa_t time; 743 struct pvclock_vcpu_time_info hv_clock; 744 unsigned int hw_tsc_khz; 745 struct gfn_to_hva_cache pv_time; 746 bool pv_time_enabled; 747 /* set guest stopped flag in pvclock flags field */ 748 bool pvclock_set_guest_stopped_request; 749 750 struct { 751 u8 preempted; 752 u64 msr_val; 753 u64 last_steal; 754 struct gfn_to_pfn_cache cache; 755 } st; 756 757 u64 l1_tsc_offset; 758 u64 tsc_offset; /* current tsc offset */ 759 u64 last_guest_tsc; 760 u64 last_host_tsc; 761 u64 tsc_offset_adjustment; 762 u64 this_tsc_nsec; 763 u64 this_tsc_write; 764 u64 this_tsc_generation; 765 bool tsc_catchup; 766 bool tsc_always_catchup; 767 s8 virtual_tsc_shift; 768 u32 virtual_tsc_mult; 769 u32 virtual_tsc_khz; 770 s64 ia32_tsc_adjust_msr; 771 u64 msr_ia32_power_ctl; 772 u64 l1_tsc_scaling_ratio; 773 u64 tsc_scaling_ratio; /* current scaling ratio */ 774 775 atomic_t nmi_queued; /* unprocessed asynchronous NMIs */ 776 unsigned nmi_pending; /* NMI queued after currently running handler */ 777 bool nmi_injected; /* Trying to inject an NMI this entry */ 778 bool smi_pending; /* SMI queued after currently running handler */ 779 780 struct kvm_mtrr mtrr_state; 781 u64 pat; 782 783 unsigned switch_db_regs; 784 unsigned long db[KVM_NR_DB_REGS]; 785 unsigned long dr6; 786 unsigned long dr7; 787 unsigned long eff_db[KVM_NR_DB_REGS]; 788 unsigned long guest_debug_dr7; 789 u64 msr_platform_info; 790 u64 msr_misc_features_enables; 791 792 u64 mcg_cap; 793 u64 mcg_status; 794 u64 mcg_ctl; 795 u64 mcg_ext_ctl; 796 u64 *mce_banks; 797 798 /* Cache MMIO info */ 799 u64 mmio_gva; 800 unsigned mmio_access; 801 gfn_t mmio_gfn; 802 u64 mmio_gen; 803 804 struct kvm_pmu pmu; 805 806 /* used for guest single stepping over the given code position */ 807 unsigned long singlestep_rip; 808 809 bool hyperv_enabled; 810 struct kvm_vcpu_hv *hyperv; 811 struct kvm_vcpu_xen xen; 812 813 cpumask_var_t wbinvd_dirty_mask; 814 815 unsigned long last_retry_eip; 816 unsigned long last_retry_addr; 817 818 struct { 819 bool halted; 820 gfn_t gfns[ASYNC_PF_PER_VCPU]; 821 struct gfn_to_hva_cache data; 822 u64 msr_en_val; /* MSR_KVM_ASYNC_PF_EN */ 823 u64 msr_int_val; /* MSR_KVM_ASYNC_PF_INT */ 824 u16 vec; 825 u32 id; 826 bool send_user_only; 827 u32 host_apf_flags; 828 unsigned long nested_apf_token; 829 bool delivery_as_pf_vmexit; 830 bool pageready_pending; 831 } apf; 832 833 /* OSVW MSRs (AMD only) */ 834 struct { 835 u64 length; 836 u64 status; 837 } osvw; 838 839 struct { 840 u64 msr_val; 841 struct gfn_to_hva_cache data; 842 } pv_eoi; 843 844 u64 msr_kvm_poll_control; 845 846 /* 847 * Indicates the guest is trying to write a gfn that contains one or 848 * more of the PTEs used to translate the write itself, i.e. the access 849 * is changing its own translation in the guest page tables. KVM exits 850 * to userspace if emulation of the faulting instruction fails and this 851 * flag is set, as KVM cannot make forward progress. 852 * 853 * If emulation fails for a write to guest page tables, KVM unprotects 854 * (zaps) the shadow page for the target gfn and resumes the guest to 855 * retry the non-emulatable instruction (on hardware). Unprotecting the 856 * gfn doesn't allow forward progress for a self-changing access because 857 * doing so also zaps the translation for the gfn, i.e. retrying the 858 * instruction will hit a !PRESENT fault, which results in a new shadow 859 * page and sends KVM back to square one. 860 */ 861 bool write_fault_to_shadow_pgtable; 862 863 /* set at EPT violation at this point */ 864 unsigned long exit_qualification; 865 866 /* pv related host specific info */ 867 struct { 868 bool pv_unhalted; 869 } pv; 870 871 int pending_ioapic_eoi; 872 int pending_external_vector; 873 874 /* be preempted when it's in kernel-mode(cpl=0) */ 875 bool preempted_in_kernel; 876 877 /* Flush the L1 Data cache for L1TF mitigation on VMENTER */ 878 bool l1tf_flush_l1d; 879 880 /* Host CPU on which VM-entry was most recently attempted */ 881 int last_vmentry_cpu; 882 883 /* AMD MSRC001_0015 Hardware Configuration */ 884 u64 msr_hwcr; 885 886 /* pv related cpuid info */ 887 struct { 888 /* 889 * value of the eax register in the KVM_CPUID_FEATURES CPUID 890 * leaf. 891 */ 892 u32 features; 893 894 /* 895 * indicates whether pv emulation should be disabled if features 896 * are not present in the guest's cpuid 897 */ 898 bool enforce; 899 } pv_cpuid; 900 901 /* Protected Guests */ 902 bool guest_state_protected; 903 904 /* 905 * Set when PDPTS were loaded directly by the userspace without 906 * reading the guest memory 907 */ 908 bool pdptrs_from_userspace; 909 910 #if IS_ENABLED(CONFIG_HYPERV) 911 hpa_t hv_root_tdp; 912 #endif 913 }; 914 915 struct kvm_lpage_info { 916 int disallow_lpage; 917 }; 918 919 struct kvm_arch_memory_slot { 920 struct kvm_rmap_head *rmap[KVM_NR_PAGE_SIZES]; 921 struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1]; 922 unsigned short *gfn_track[KVM_PAGE_TRACK_MAX]; 923 }; 924 925 /* 926 * We use as the mode the number of bits allocated in the LDR for the 927 * logical processor ID. It happens that these are all powers of two. 928 * This makes it is very easy to detect cases where the APICs are 929 * configured for multiple modes; in that case, we cannot use the map and 930 * hence cannot use kvm_irq_delivery_to_apic_fast either. 931 */ 932 #define KVM_APIC_MODE_XAPIC_CLUSTER 4 933 #define KVM_APIC_MODE_XAPIC_FLAT 8 934 #define KVM_APIC_MODE_X2APIC 16 935 936 struct kvm_apic_map { 937 struct rcu_head rcu; 938 u8 mode; 939 u32 max_apic_id; 940 union { 941 struct kvm_lapic *xapic_flat_map[8]; 942 struct kvm_lapic *xapic_cluster_map[16][4]; 943 }; 944 struct kvm_lapic *phys_map[]; 945 }; 946 947 /* Hyper-V synthetic debugger (SynDbg)*/ 948 struct kvm_hv_syndbg { 949 struct { 950 u64 control; 951 u64 status; 952 u64 send_page; 953 u64 recv_page; 954 u64 pending_page; 955 } control; 956 u64 options; 957 }; 958 959 /* Current state of Hyper-V TSC page clocksource */ 960 enum hv_tsc_page_status { 961 /* TSC page was not set up or disabled */ 962 HV_TSC_PAGE_UNSET = 0, 963 /* TSC page MSR was written by the guest, update pending */ 964 HV_TSC_PAGE_GUEST_CHANGED, 965 /* TSC page MSR was written by KVM userspace, update pending */ 966 HV_TSC_PAGE_HOST_CHANGED, 967 /* TSC page was properly set up and is currently active */ 968 HV_TSC_PAGE_SET, 969 /* TSC page is currently being updated and therefore is inactive */ 970 HV_TSC_PAGE_UPDATING, 971 /* TSC page was set up with an inaccessible GPA */ 972 HV_TSC_PAGE_BROKEN, 973 }; 974 975 /* Hyper-V emulation context */ 976 struct kvm_hv { 977 struct mutex hv_lock; 978 u64 hv_guest_os_id; 979 u64 hv_hypercall; 980 u64 hv_tsc_page; 981 enum hv_tsc_page_status hv_tsc_page_status; 982 983 /* Hyper-v based guest crash (NT kernel bugcheck) parameters */ 984 u64 hv_crash_param[HV_X64_MSR_CRASH_PARAMS]; 985 u64 hv_crash_ctl; 986 987 struct ms_hyperv_tsc_page tsc_ref; 988 989 struct idr conn_to_evt; 990 991 u64 hv_reenlightenment_control; 992 u64 hv_tsc_emulation_control; 993 u64 hv_tsc_emulation_status; 994 995 /* How many vCPUs have VP index != vCPU index */ 996 atomic_t num_mismatched_vp_indexes; 997 998 /* 999 * How many SynICs use 'AutoEOI' feature 1000 * (protected by arch.apicv_update_lock) 1001 */ 1002 unsigned int synic_auto_eoi_used; 1003 1004 struct hv_partition_assist_pg *hv_pa_pg; 1005 struct kvm_hv_syndbg hv_syndbg; 1006 }; 1007 1008 struct msr_bitmap_range { 1009 u32 flags; 1010 u32 nmsrs; 1011 u32 base; 1012 unsigned long *bitmap; 1013 }; 1014 1015 /* Xen emulation context */ 1016 struct kvm_xen { 1017 bool long_mode; 1018 u8 upcall_vector; 1019 gfn_t shinfo_gfn; 1020 }; 1021 1022 enum kvm_irqchip_mode { 1023 KVM_IRQCHIP_NONE, 1024 KVM_IRQCHIP_KERNEL, /* created with KVM_CREATE_IRQCHIP */ 1025 KVM_IRQCHIP_SPLIT, /* created with KVM_CAP_SPLIT_IRQCHIP */ 1026 }; 1027 1028 struct kvm_x86_msr_filter { 1029 u8 count; 1030 bool default_allow:1; 1031 struct msr_bitmap_range ranges[16]; 1032 }; 1033 1034 #define APICV_INHIBIT_REASON_DISABLE 0 1035 #define APICV_INHIBIT_REASON_HYPERV 1 1036 #define APICV_INHIBIT_REASON_NESTED 2 1037 #define APICV_INHIBIT_REASON_IRQWIN 3 1038 #define APICV_INHIBIT_REASON_PIT_REINJ 4 1039 #define APICV_INHIBIT_REASON_X2APIC 5 1040 1041 struct kvm_arch { 1042 unsigned long n_used_mmu_pages; 1043 unsigned long n_requested_mmu_pages; 1044 unsigned long n_max_mmu_pages; 1045 unsigned int indirect_shadow_pages; 1046 u8 mmu_valid_gen; 1047 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES]; 1048 struct list_head active_mmu_pages; 1049 struct list_head zapped_obsolete_pages; 1050 struct list_head lpage_disallowed_mmu_pages; 1051 struct kvm_page_track_notifier_node mmu_sp_tracker; 1052 struct kvm_page_track_notifier_head track_notifier_head; 1053 /* 1054 * Protects marking pages unsync during page faults, as TDP MMU page 1055 * faults only take mmu_lock for read. For simplicity, the unsync 1056 * pages lock is always taken when marking pages unsync regardless of 1057 * whether mmu_lock is held for read or write. 1058 */ 1059 spinlock_t mmu_unsync_pages_lock; 1060 1061 struct list_head assigned_dev_head; 1062 struct iommu_domain *iommu_domain; 1063 bool iommu_noncoherent; 1064 #define __KVM_HAVE_ARCH_NONCOHERENT_DMA 1065 atomic_t noncoherent_dma_count; 1066 #define __KVM_HAVE_ARCH_ASSIGNED_DEVICE 1067 atomic_t assigned_device_count; 1068 struct kvm_pic *vpic; 1069 struct kvm_ioapic *vioapic; 1070 struct kvm_pit *vpit; 1071 atomic_t vapics_in_nmi_mode; 1072 struct mutex apic_map_lock; 1073 struct kvm_apic_map __rcu *apic_map; 1074 atomic_t apic_map_dirty; 1075 1076 /* Protects apic_access_memslot_enabled and apicv_inhibit_reasons */ 1077 struct mutex apicv_update_lock; 1078 1079 bool apic_access_memslot_enabled; 1080 unsigned long apicv_inhibit_reasons; 1081 1082 gpa_t wall_clock; 1083 1084 bool mwait_in_guest; 1085 bool hlt_in_guest; 1086 bool pause_in_guest; 1087 bool cstate_in_guest; 1088 1089 unsigned long irq_sources_bitmap; 1090 s64 kvmclock_offset; 1091 raw_spinlock_t tsc_write_lock; 1092 u64 last_tsc_nsec; 1093 u64 last_tsc_write; 1094 u32 last_tsc_khz; 1095 u64 cur_tsc_nsec; 1096 u64 cur_tsc_write; 1097 u64 cur_tsc_offset; 1098 u64 cur_tsc_generation; 1099 int nr_vcpus_matched_tsc; 1100 1101 spinlock_t pvclock_gtod_sync_lock; 1102 bool use_master_clock; 1103 u64 master_kernel_ns; 1104 u64 master_cycle_now; 1105 struct delayed_work kvmclock_update_work; 1106 struct delayed_work kvmclock_sync_work; 1107 1108 struct kvm_xen_hvm_config xen_hvm_config; 1109 1110 /* reads protected by irq_srcu, writes by irq_lock */ 1111 struct hlist_head mask_notifier_list; 1112 1113 struct kvm_hv hyperv; 1114 struct kvm_xen xen; 1115 1116 #ifdef CONFIG_KVM_MMU_AUDIT 1117 int audit_point; 1118 #endif 1119 1120 bool backwards_tsc_observed; 1121 bool boot_vcpu_runs_old_kvmclock; 1122 u32 bsp_vcpu_id; 1123 1124 u64 disabled_quirks; 1125 int cpu_dirty_logging_count; 1126 1127 enum kvm_irqchip_mode irqchip_mode; 1128 u8 nr_reserved_ioapic_pins; 1129 1130 bool disabled_lapic_found; 1131 1132 bool x2apic_format; 1133 bool x2apic_broadcast_quirk_disabled; 1134 1135 bool guest_can_read_msr_platform_info; 1136 bool exception_payload_enabled; 1137 1138 bool bus_lock_detection_enabled; 1139 /* 1140 * If exit_on_emulation_error is set, and the in-kernel instruction 1141 * emulator fails to emulate an instruction, allow userspace 1142 * the opportunity to look at it. 1143 */ 1144 bool exit_on_emulation_error; 1145 1146 /* Deflect RDMSR and WRMSR to user space when they trigger a #GP */ 1147 u32 user_space_msr_mask; 1148 struct kvm_x86_msr_filter __rcu *msr_filter; 1149 1150 u32 hypercall_exit_enabled; 1151 1152 /* Guest can access the SGX PROVISIONKEY. */ 1153 bool sgx_provisioning_allowed; 1154 1155 struct kvm_pmu_event_filter __rcu *pmu_event_filter; 1156 struct task_struct *nx_lpage_recovery_thread; 1157 1158 #ifdef CONFIG_X86_64 1159 /* 1160 * Whether the TDP MMU is enabled for this VM. This contains a 1161 * snapshot of the TDP MMU module parameter from when the VM was 1162 * created and remains unchanged for the life of the VM. If this is 1163 * true, TDP MMU handler functions will run for various MMU 1164 * operations. 1165 */ 1166 bool tdp_mmu_enabled; 1167 1168 /* 1169 * List of struct kvm_mmu_pages being used as roots. 1170 * All struct kvm_mmu_pages in the list should have 1171 * tdp_mmu_page set. 1172 * 1173 * For reads, this list is protected by: 1174 * the MMU lock in read mode + RCU or 1175 * the MMU lock in write mode 1176 * 1177 * For writes, this list is protected by: 1178 * the MMU lock in read mode + the tdp_mmu_pages_lock or 1179 * the MMU lock in write mode 1180 * 1181 * Roots will remain in the list until their tdp_mmu_root_count 1182 * drops to zero, at which point the thread that decremented the 1183 * count to zero should removed the root from the list and clean 1184 * it up, freeing the root after an RCU grace period. 1185 */ 1186 struct list_head tdp_mmu_roots; 1187 1188 /* 1189 * List of struct kvmp_mmu_pages not being used as roots. 1190 * All struct kvm_mmu_pages in the list should have 1191 * tdp_mmu_page set and a tdp_mmu_root_count of 0. 1192 */ 1193 struct list_head tdp_mmu_pages; 1194 1195 /* 1196 * Protects accesses to the following fields when the MMU lock 1197 * is held in read mode: 1198 * - tdp_mmu_roots (above) 1199 * - tdp_mmu_pages (above) 1200 * - the link field of struct kvm_mmu_pages used by the TDP MMU 1201 * - lpage_disallowed_mmu_pages 1202 * - the lpage_disallowed_link field of struct kvm_mmu_pages used 1203 * by the TDP MMU 1204 * It is acceptable, but not necessary, to acquire this lock when 1205 * the thread holds the MMU lock in write mode. 1206 */ 1207 spinlock_t tdp_mmu_pages_lock; 1208 #endif /* CONFIG_X86_64 */ 1209 1210 /* 1211 * If set, rmaps have been allocated for all memslots and should be 1212 * allocated for any newly created or modified memslots. 1213 */ 1214 bool memslots_have_rmaps; 1215 1216 #if IS_ENABLED(CONFIG_HYPERV) 1217 hpa_t hv_root_tdp; 1218 spinlock_t hv_root_tdp_lock; 1219 #endif 1220 }; 1221 1222 struct kvm_vm_stat { 1223 struct kvm_vm_stat_generic generic; 1224 u64 mmu_shadow_zapped; 1225 u64 mmu_pte_write; 1226 u64 mmu_pde_zapped; 1227 u64 mmu_flooded; 1228 u64 mmu_recycled; 1229 u64 mmu_cache_miss; 1230 u64 mmu_unsync; 1231 union { 1232 struct { 1233 atomic64_t pages_4k; 1234 atomic64_t pages_2m; 1235 atomic64_t pages_1g; 1236 }; 1237 atomic64_t pages[KVM_NR_PAGE_SIZES]; 1238 }; 1239 u64 nx_lpage_splits; 1240 u64 max_mmu_page_hash_collisions; 1241 u64 max_mmu_rmap_size; 1242 }; 1243 1244 struct kvm_vcpu_stat { 1245 struct kvm_vcpu_stat_generic generic; 1246 u64 pf_fixed; 1247 u64 pf_guest; 1248 u64 tlb_flush; 1249 u64 invlpg; 1250 1251 u64 exits; 1252 u64 io_exits; 1253 u64 mmio_exits; 1254 u64 signal_exits; 1255 u64 irq_window_exits; 1256 u64 nmi_window_exits; 1257 u64 l1d_flush; 1258 u64 halt_exits; 1259 u64 request_irq_exits; 1260 u64 irq_exits; 1261 u64 host_state_reload; 1262 u64 fpu_reload; 1263 u64 insn_emulation; 1264 u64 insn_emulation_fail; 1265 u64 hypercalls; 1266 u64 irq_injections; 1267 u64 nmi_injections; 1268 u64 req_event; 1269 u64 nested_run; 1270 u64 directed_yield_attempted; 1271 u64 directed_yield_successful; 1272 u64 guest_mode; 1273 }; 1274 1275 struct x86_instruction_info; 1276 1277 struct msr_data { 1278 bool host_initiated; 1279 u32 index; 1280 u64 data; 1281 }; 1282 1283 struct kvm_lapic_irq { 1284 u32 vector; 1285 u16 delivery_mode; 1286 u16 dest_mode; 1287 bool level; 1288 u16 trig_mode; 1289 u32 shorthand; 1290 u32 dest_id; 1291 bool msi_redir_hint; 1292 }; 1293 1294 static inline u16 kvm_lapic_irq_dest_mode(bool dest_mode_logical) 1295 { 1296 return dest_mode_logical ? APIC_DEST_LOGICAL : APIC_DEST_PHYSICAL; 1297 } 1298 1299 struct kvm_x86_ops { 1300 int (*hardware_enable)(void); 1301 void (*hardware_disable)(void); 1302 void (*hardware_unsetup)(void); 1303 bool (*cpu_has_accelerated_tpr)(void); 1304 bool (*has_emulated_msr)(struct kvm *kvm, u32 index); 1305 void (*vcpu_after_set_cpuid)(struct kvm_vcpu *vcpu); 1306 1307 unsigned int vm_size; 1308 int (*vm_init)(struct kvm *kvm); 1309 void (*vm_destroy)(struct kvm *kvm); 1310 1311 /* Create, but do not attach this VCPU */ 1312 int (*vcpu_create)(struct kvm_vcpu *vcpu); 1313 void (*vcpu_free)(struct kvm_vcpu *vcpu); 1314 void (*vcpu_reset)(struct kvm_vcpu *vcpu, bool init_event); 1315 1316 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu); 1317 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu); 1318 void (*vcpu_put)(struct kvm_vcpu *vcpu); 1319 1320 void (*update_exception_bitmap)(struct kvm_vcpu *vcpu); 1321 int (*get_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr); 1322 int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr); 1323 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg); 1324 void (*get_segment)(struct kvm_vcpu *vcpu, 1325 struct kvm_segment *var, int seg); 1326 int (*get_cpl)(struct kvm_vcpu *vcpu); 1327 void (*set_segment)(struct kvm_vcpu *vcpu, 1328 struct kvm_segment *var, int seg); 1329 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l); 1330 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0); 1331 bool (*is_valid_cr4)(struct kvm_vcpu *vcpu, unsigned long cr0); 1332 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4); 1333 int (*set_efer)(struct kvm_vcpu *vcpu, u64 efer); 1334 void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 1335 void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 1336 void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 1337 void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 1338 void (*sync_dirty_debug_regs)(struct kvm_vcpu *vcpu); 1339 void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value); 1340 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg); 1341 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu); 1342 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags); 1343 1344 void (*tlb_flush_all)(struct kvm_vcpu *vcpu); 1345 void (*tlb_flush_current)(struct kvm_vcpu *vcpu); 1346 int (*tlb_remote_flush)(struct kvm *kvm); 1347 int (*tlb_remote_flush_with_range)(struct kvm *kvm, 1348 struct kvm_tlb_range *range); 1349 1350 /* 1351 * Flush any TLB entries associated with the given GVA. 1352 * Does not need to flush GPA->HPA mappings. 1353 * Can potentially get non-canonical addresses through INVLPGs, which 1354 * the implementation may choose to ignore if appropriate. 1355 */ 1356 void (*tlb_flush_gva)(struct kvm_vcpu *vcpu, gva_t addr); 1357 1358 /* 1359 * Flush any TLB entries created by the guest. Like tlb_flush_gva(), 1360 * does not need to flush GPA->HPA mappings. 1361 */ 1362 void (*tlb_flush_guest)(struct kvm_vcpu *vcpu); 1363 1364 enum exit_fastpath_completion (*run)(struct kvm_vcpu *vcpu); 1365 int (*handle_exit)(struct kvm_vcpu *vcpu, 1366 enum exit_fastpath_completion exit_fastpath); 1367 int (*skip_emulated_instruction)(struct kvm_vcpu *vcpu); 1368 void (*update_emulated_instruction)(struct kvm_vcpu *vcpu); 1369 void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 1370 u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu); 1371 void (*patch_hypercall)(struct kvm_vcpu *vcpu, 1372 unsigned char *hypercall_addr); 1373 void (*set_irq)(struct kvm_vcpu *vcpu); 1374 void (*set_nmi)(struct kvm_vcpu *vcpu); 1375 void (*queue_exception)(struct kvm_vcpu *vcpu); 1376 void (*cancel_injection)(struct kvm_vcpu *vcpu); 1377 int (*interrupt_allowed)(struct kvm_vcpu *vcpu, bool for_injection); 1378 int (*nmi_allowed)(struct kvm_vcpu *vcpu, bool for_injection); 1379 bool (*get_nmi_mask)(struct kvm_vcpu *vcpu); 1380 void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked); 1381 void (*enable_nmi_window)(struct kvm_vcpu *vcpu); 1382 void (*enable_irq_window)(struct kvm_vcpu *vcpu); 1383 void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr); 1384 bool (*check_apicv_inhibit_reasons)(ulong bit); 1385 void (*refresh_apicv_exec_ctrl)(struct kvm_vcpu *vcpu); 1386 void (*hwapic_irr_update)(struct kvm_vcpu *vcpu, int max_irr); 1387 void (*hwapic_isr_update)(struct kvm_vcpu *vcpu, int isr); 1388 bool (*guest_apic_has_interrupt)(struct kvm_vcpu *vcpu); 1389 void (*load_eoi_exitmap)(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap); 1390 void (*set_virtual_apic_mode)(struct kvm_vcpu *vcpu); 1391 void (*set_apic_access_page_addr)(struct kvm_vcpu *vcpu); 1392 int (*deliver_posted_interrupt)(struct kvm_vcpu *vcpu, int vector); 1393 int (*sync_pir_to_irr)(struct kvm_vcpu *vcpu); 1394 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr); 1395 int (*set_identity_map_addr)(struct kvm *kvm, u64 ident_addr); 1396 u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio); 1397 1398 void (*load_mmu_pgd)(struct kvm_vcpu *vcpu, hpa_t root_hpa, 1399 int root_level); 1400 1401 bool (*has_wbinvd_exit)(void); 1402 1403 u64 (*get_l2_tsc_offset)(struct kvm_vcpu *vcpu); 1404 u64 (*get_l2_tsc_multiplier)(struct kvm_vcpu *vcpu); 1405 void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset); 1406 void (*write_tsc_multiplier)(struct kvm_vcpu *vcpu, u64 multiplier); 1407 1408 /* 1409 * Retrieve somewhat arbitrary exit information. Intended to be used 1410 * only from within tracepoints to avoid VMREADs when tracing is off. 1411 */ 1412 void (*get_exit_info)(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2, 1413 u32 *exit_int_info, u32 *exit_int_info_err_code); 1414 1415 int (*check_intercept)(struct kvm_vcpu *vcpu, 1416 struct x86_instruction_info *info, 1417 enum x86_intercept_stage stage, 1418 struct x86_exception *exception); 1419 void (*handle_exit_irqoff)(struct kvm_vcpu *vcpu); 1420 1421 void (*request_immediate_exit)(struct kvm_vcpu *vcpu); 1422 1423 void (*sched_in)(struct kvm_vcpu *kvm, int cpu); 1424 1425 /* 1426 * Size of the CPU's dirty log buffer, i.e. VMX's PML buffer. A zero 1427 * value indicates CPU dirty logging is unsupported or disabled. 1428 */ 1429 int cpu_dirty_log_size; 1430 void (*update_cpu_dirty_logging)(struct kvm_vcpu *vcpu); 1431 1432 /* pmu operations of sub-arch */ 1433 const struct kvm_pmu_ops *pmu_ops; 1434 const struct kvm_x86_nested_ops *nested_ops; 1435 1436 /* 1437 * Architecture specific hooks for vCPU blocking due to 1438 * HLT instruction. 1439 * Returns for .pre_block(): 1440 * - 0 means continue to block the vCPU. 1441 * - 1 means we cannot block the vCPU since some event 1442 * happens during this period, such as, 'ON' bit in 1443 * posted-interrupts descriptor is set. 1444 */ 1445 int (*pre_block)(struct kvm_vcpu *vcpu); 1446 void (*post_block)(struct kvm_vcpu *vcpu); 1447 1448 void (*vcpu_blocking)(struct kvm_vcpu *vcpu); 1449 void (*vcpu_unblocking)(struct kvm_vcpu *vcpu); 1450 1451 int (*update_pi_irte)(struct kvm *kvm, unsigned int host_irq, 1452 uint32_t guest_irq, bool set); 1453 void (*start_assignment)(struct kvm *kvm); 1454 void (*apicv_post_state_restore)(struct kvm_vcpu *vcpu); 1455 bool (*dy_apicv_has_pending_interrupt)(struct kvm_vcpu *vcpu); 1456 1457 int (*set_hv_timer)(struct kvm_vcpu *vcpu, u64 guest_deadline_tsc, 1458 bool *expired); 1459 void (*cancel_hv_timer)(struct kvm_vcpu *vcpu); 1460 1461 void (*setup_mce)(struct kvm_vcpu *vcpu); 1462 1463 int (*smi_allowed)(struct kvm_vcpu *vcpu, bool for_injection); 1464 int (*enter_smm)(struct kvm_vcpu *vcpu, char *smstate); 1465 int (*leave_smm)(struct kvm_vcpu *vcpu, const char *smstate); 1466 void (*enable_smi_window)(struct kvm_vcpu *vcpu); 1467 1468 int (*mem_enc_op)(struct kvm *kvm, void __user *argp); 1469 int (*mem_enc_reg_region)(struct kvm *kvm, struct kvm_enc_region *argp); 1470 int (*mem_enc_unreg_region)(struct kvm *kvm, struct kvm_enc_region *argp); 1471 int (*vm_copy_enc_context_from)(struct kvm *kvm, unsigned int source_fd); 1472 1473 int (*get_msr_feature)(struct kvm_msr_entry *entry); 1474 1475 bool (*can_emulate_instruction)(struct kvm_vcpu *vcpu, void *insn, int insn_len); 1476 1477 bool (*apic_init_signal_blocked)(struct kvm_vcpu *vcpu); 1478 int (*enable_direct_tlbflush)(struct kvm_vcpu *vcpu); 1479 1480 void (*migrate_timers)(struct kvm_vcpu *vcpu); 1481 void (*msr_filter_changed)(struct kvm_vcpu *vcpu); 1482 int (*complete_emulated_msr)(struct kvm_vcpu *vcpu, int err); 1483 1484 void (*vcpu_deliver_sipi_vector)(struct kvm_vcpu *vcpu, u8 vector); 1485 }; 1486 1487 struct kvm_x86_nested_ops { 1488 int (*check_events)(struct kvm_vcpu *vcpu); 1489 bool (*hv_timer_pending)(struct kvm_vcpu *vcpu); 1490 void (*triple_fault)(struct kvm_vcpu *vcpu); 1491 int (*get_state)(struct kvm_vcpu *vcpu, 1492 struct kvm_nested_state __user *user_kvm_nested_state, 1493 unsigned user_data_size); 1494 int (*set_state)(struct kvm_vcpu *vcpu, 1495 struct kvm_nested_state __user *user_kvm_nested_state, 1496 struct kvm_nested_state *kvm_state); 1497 bool (*get_nested_state_pages)(struct kvm_vcpu *vcpu); 1498 int (*write_log_dirty)(struct kvm_vcpu *vcpu, gpa_t l2_gpa); 1499 1500 int (*enable_evmcs)(struct kvm_vcpu *vcpu, 1501 uint16_t *vmcs_version); 1502 uint16_t (*get_evmcs_version)(struct kvm_vcpu *vcpu); 1503 }; 1504 1505 struct kvm_x86_init_ops { 1506 int (*cpu_has_kvm_support)(void); 1507 int (*disabled_by_bios)(void); 1508 int (*check_processor_compatibility)(void); 1509 int (*hardware_setup)(void); 1510 1511 struct kvm_x86_ops *runtime_ops; 1512 }; 1513 1514 struct kvm_arch_async_pf { 1515 u32 token; 1516 gfn_t gfn; 1517 unsigned long cr3; 1518 bool direct_map; 1519 }; 1520 1521 extern u32 __read_mostly kvm_nr_uret_msrs; 1522 extern u64 __read_mostly host_efer; 1523 extern bool __read_mostly allow_smaller_maxphyaddr; 1524 extern bool __read_mostly enable_apicv; 1525 extern struct kvm_x86_ops kvm_x86_ops; 1526 1527 #define KVM_X86_OP(func) \ 1528 DECLARE_STATIC_CALL(kvm_x86_##func, *(((struct kvm_x86_ops *)0)->func)); 1529 #define KVM_X86_OP_NULL KVM_X86_OP 1530 #include <asm/kvm-x86-ops.h> 1531 1532 static inline void kvm_ops_static_call_update(void) 1533 { 1534 #define KVM_X86_OP(func) \ 1535 static_call_update(kvm_x86_##func, kvm_x86_ops.func); 1536 #define KVM_X86_OP_NULL KVM_X86_OP 1537 #include <asm/kvm-x86-ops.h> 1538 } 1539 1540 #define __KVM_HAVE_ARCH_VM_ALLOC 1541 static inline struct kvm *kvm_arch_alloc_vm(void) 1542 { 1543 return __vmalloc(kvm_x86_ops.vm_size, GFP_KERNEL_ACCOUNT | __GFP_ZERO); 1544 } 1545 void kvm_arch_free_vm(struct kvm *kvm); 1546 1547 #define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB 1548 static inline int kvm_arch_flush_remote_tlb(struct kvm *kvm) 1549 { 1550 if (kvm_x86_ops.tlb_remote_flush && 1551 !static_call(kvm_x86_tlb_remote_flush)(kvm)) 1552 return 0; 1553 else 1554 return -ENOTSUPP; 1555 } 1556 1557 int kvm_mmu_module_init(void); 1558 void kvm_mmu_module_exit(void); 1559 1560 void kvm_mmu_destroy(struct kvm_vcpu *vcpu); 1561 int kvm_mmu_create(struct kvm_vcpu *vcpu); 1562 void kvm_mmu_init_vm(struct kvm *kvm); 1563 void kvm_mmu_uninit_vm(struct kvm *kvm); 1564 1565 void kvm_mmu_after_set_cpuid(struct kvm_vcpu *vcpu); 1566 void kvm_mmu_reset_context(struct kvm_vcpu *vcpu); 1567 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, 1568 const struct kvm_memory_slot *memslot, 1569 int start_level); 1570 void kvm_mmu_zap_collapsible_sptes(struct kvm *kvm, 1571 const struct kvm_memory_slot *memslot); 1572 void kvm_mmu_slot_leaf_clear_dirty(struct kvm *kvm, 1573 const struct kvm_memory_slot *memslot); 1574 void kvm_mmu_zap_all(struct kvm *kvm); 1575 void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm, u64 gen); 1576 unsigned long kvm_mmu_calculate_default_mmu_pages(struct kvm *kvm); 1577 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned long kvm_nr_mmu_pages); 1578 1579 int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3); 1580 1581 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, 1582 const void *val, int bytes); 1583 1584 struct kvm_irq_mask_notifier { 1585 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked); 1586 int irq; 1587 struct hlist_node link; 1588 }; 1589 1590 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, 1591 struct kvm_irq_mask_notifier *kimn); 1592 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, 1593 struct kvm_irq_mask_notifier *kimn); 1594 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin, 1595 bool mask); 1596 1597 extern bool tdp_enabled; 1598 1599 u64 vcpu_tsc_khz(struct kvm_vcpu *vcpu); 1600 1601 /* control of guest tsc rate supported? */ 1602 extern bool kvm_has_tsc_control; 1603 /* maximum supported tsc_khz for guests */ 1604 extern u32 kvm_max_guest_tsc_khz; 1605 /* number of bits of the fractional part of the TSC scaling ratio */ 1606 extern u8 kvm_tsc_scaling_ratio_frac_bits; 1607 /* maximum allowed value of TSC scaling ratio */ 1608 extern u64 kvm_max_tsc_scaling_ratio; 1609 /* 1ull << kvm_tsc_scaling_ratio_frac_bits */ 1610 extern u64 kvm_default_tsc_scaling_ratio; 1611 /* bus lock detection supported? */ 1612 extern bool kvm_has_bus_lock_exit; 1613 1614 extern u64 kvm_mce_cap_supported; 1615 1616 /* 1617 * EMULTYPE_NO_DECODE - Set when re-emulating an instruction (after completing 1618 * userspace I/O) to indicate that the emulation context 1619 * should be reused as is, i.e. skip initialization of 1620 * emulation context, instruction fetch and decode. 1621 * 1622 * EMULTYPE_TRAP_UD - Set when emulating an intercepted #UD from hardware. 1623 * Indicates that only select instructions (tagged with 1624 * EmulateOnUD) should be emulated (to minimize the emulator 1625 * attack surface). See also EMULTYPE_TRAP_UD_FORCED. 1626 * 1627 * EMULTYPE_SKIP - Set when emulating solely to skip an instruction, i.e. to 1628 * decode the instruction length. For use *only* by 1629 * kvm_x86_ops.skip_emulated_instruction() implementations. 1630 * 1631 * EMULTYPE_ALLOW_RETRY_PF - Set when the emulator should resume the guest to 1632 * retry native execution under certain conditions, 1633 * Can only be set in conjunction with EMULTYPE_PF. 1634 * 1635 * EMULTYPE_TRAP_UD_FORCED - Set when emulating an intercepted #UD that was 1636 * triggered by KVM's magic "force emulation" prefix, 1637 * which is opt in via module param (off by default). 1638 * Bypasses EmulateOnUD restriction despite emulating 1639 * due to an intercepted #UD (see EMULTYPE_TRAP_UD). 1640 * Used to test the full emulator from userspace. 1641 * 1642 * EMULTYPE_VMWARE_GP - Set when emulating an intercepted #GP for VMware 1643 * backdoor emulation, which is opt in via module param. 1644 * VMware backdoor emulation handles select instructions 1645 * and reinjects the #GP for all other cases. 1646 * 1647 * EMULTYPE_PF - Set when emulating MMIO by way of an intercepted #PF, in which 1648 * case the CR2/GPA value pass on the stack is valid. 1649 */ 1650 #define EMULTYPE_NO_DECODE (1 << 0) 1651 #define EMULTYPE_TRAP_UD (1 << 1) 1652 #define EMULTYPE_SKIP (1 << 2) 1653 #define EMULTYPE_ALLOW_RETRY_PF (1 << 3) 1654 #define EMULTYPE_TRAP_UD_FORCED (1 << 4) 1655 #define EMULTYPE_VMWARE_GP (1 << 5) 1656 #define EMULTYPE_PF (1 << 6) 1657 1658 int kvm_emulate_instruction(struct kvm_vcpu *vcpu, int emulation_type); 1659 int kvm_emulate_instruction_from_buffer(struct kvm_vcpu *vcpu, 1660 void *insn, int insn_len); 1661 1662 void kvm_enable_efer_bits(u64); 1663 bool kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer); 1664 int __kvm_get_msr(struct kvm_vcpu *vcpu, u32 index, u64 *data, bool host_initiated); 1665 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 index, u64 *data); 1666 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 index, u64 data); 1667 int kvm_emulate_rdmsr(struct kvm_vcpu *vcpu); 1668 int kvm_emulate_wrmsr(struct kvm_vcpu *vcpu); 1669 int kvm_emulate_as_nop(struct kvm_vcpu *vcpu); 1670 int kvm_emulate_invd(struct kvm_vcpu *vcpu); 1671 int kvm_emulate_mwait(struct kvm_vcpu *vcpu); 1672 int kvm_handle_invalid_op(struct kvm_vcpu *vcpu); 1673 int kvm_emulate_monitor(struct kvm_vcpu *vcpu); 1674 1675 int kvm_fast_pio(struct kvm_vcpu *vcpu, int size, unsigned short port, int in); 1676 int kvm_emulate_cpuid(struct kvm_vcpu *vcpu); 1677 int kvm_emulate_halt(struct kvm_vcpu *vcpu); 1678 int kvm_vcpu_halt(struct kvm_vcpu *vcpu); 1679 int kvm_emulate_ap_reset_hold(struct kvm_vcpu *vcpu); 1680 int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu); 1681 1682 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); 1683 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg); 1684 void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector); 1685 1686 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index, 1687 int reason, bool has_error_code, u32 error_code); 1688 1689 void kvm_free_guest_fpu(struct kvm_vcpu *vcpu); 1690 1691 void kvm_post_set_cr0(struct kvm_vcpu *vcpu, unsigned long old_cr0, unsigned long cr0); 1692 void kvm_post_set_cr4(struct kvm_vcpu *vcpu, unsigned long old_cr4, unsigned long cr4); 1693 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0); 1694 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3); 1695 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); 1696 int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8); 1697 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val); 1698 void kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val); 1699 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu); 1700 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw); 1701 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l); 1702 int kvm_emulate_xsetbv(struct kvm_vcpu *vcpu); 1703 1704 int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr); 1705 int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr); 1706 1707 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu); 1708 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); 1709 int kvm_emulate_rdpmc(struct kvm_vcpu *vcpu); 1710 1711 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr); 1712 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 1713 void kvm_queue_exception_p(struct kvm_vcpu *vcpu, unsigned nr, unsigned long payload); 1714 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr); 1715 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 1716 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault); 1717 bool kvm_inject_emulated_page_fault(struct kvm_vcpu *vcpu, 1718 struct x86_exception *fault); 1719 int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, 1720 gfn_t gfn, void *data, int offset, int len, 1721 u32 access); 1722 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl); 1723 bool kvm_require_dr(struct kvm_vcpu *vcpu, int dr); 1724 1725 static inline int __kvm_irq_line_state(unsigned long *irq_state, 1726 int irq_source_id, int level) 1727 { 1728 /* Logical OR for level trig interrupt */ 1729 if (level) 1730 __set_bit(irq_source_id, irq_state); 1731 else 1732 __clear_bit(irq_source_id, irq_state); 1733 1734 return !!(*irq_state); 1735 } 1736 1737 #define KVM_MMU_ROOT_CURRENT BIT(0) 1738 #define KVM_MMU_ROOT_PREVIOUS(i) BIT(1+i) 1739 #define KVM_MMU_ROOTS_ALL (~0UL) 1740 1741 int kvm_pic_set_irq(struct kvm_pic *pic, int irq, int irq_source_id, int level); 1742 void kvm_pic_clear_all(struct kvm_pic *pic, int irq_source_id); 1743 1744 void kvm_inject_nmi(struct kvm_vcpu *vcpu); 1745 1746 void kvm_update_dr7(struct kvm_vcpu *vcpu); 1747 1748 int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn); 1749 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu); 1750 void kvm_mmu_free_roots(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, 1751 ulong roots_to_free); 1752 void kvm_mmu_free_guest_mode_roots(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu); 1753 gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access, 1754 struct x86_exception *exception); 1755 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, 1756 struct x86_exception *exception); 1757 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, 1758 struct x86_exception *exception); 1759 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, 1760 struct x86_exception *exception); 1761 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, 1762 struct x86_exception *exception); 1763 1764 bool kvm_apicv_activated(struct kvm *kvm); 1765 void kvm_vcpu_update_apicv(struct kvm_vcpu *vcpu); 1766 void kvm_request_apicv_update(struct kvm *kvm, bool activate, 1767 unsigned long bit); 1768 1769 void __kvm_request_apicv_update(struct kvm *kvm, bool activate, 1770 unsigned long bit); 1771 1772 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu); 1773 1774 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u64 error_code, 1775 void *insn, int insn_len); 1776 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva); 1777 void kvm_mmu_invalidate_gva(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, 1778 gva_t gva, hpa_t root_hpa); 1779 void kvm_mmu_invpcid_gva(struct kvm_vcpu *vcpu, gva_t gva, unsigned long pcid); 1780 void kvm_mmu_new_pgd(struct kvm_vcpu *vcpu, gpa_t new_pgd); 1781 1782 void kvm_configure_mmu(bool enable_tdp, int tdp_forced_root_level, 1783 int tdp_max_root_level, int tdp_huge_page_level); 1784 1785 static inline u16 kvm_read_ldt(void) 1786 { 1787 u16 ldt; 1788 asm("sldt %0" : "=g"(ldt)); 1789 return ldt; 1790 } 1791 1792 static inline void kvm_load_ldt(u16 sel) 1793 { 1794 asm("lldt %0" : : "rm"(sel)); 1795 } 1796 1797 #ifdef CONFIG_X86_64 1798 static inline unsigned long read_msr(unsigned long msr) 1799 { 1800 u64 value; 1801 1802 rdmsrl(msr, value); 1803 return value; 1804 } 1805 #endif 1806 1807 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code) 1808 { 1809 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code); 1810 } 1811 1812 #define TSS_IOPB_BASE_OFFSET 0x66 1813 #define TSS_BASE_SIZE 0x68 1814 #define TSS_IOPB_SIZE (65536 / 8) 1815 #define TSS_REDIRECTION_SIZE (256 / 8) 1816 #define RMODE_TSS_SIZE \ 1817 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1) 1818 1819 enum { 1820 TASK_SWITCH_CALL = 0, 1821 TASK_SWITCH_IRET = 1, 1822 TASK_SWITCH_JMP = 2, 1823 TASK_SWITCH_GATE = 3, 1824 }; 1825 1826 #define HF_GIF_MASK (1 << 0) 1827 #define HF_NMI_MASK (1 << 3) 1828 #define HF_IRET_MASK (1 << 4) 1829 #define HF_GUEST_MASK (1 << 5) /* VCPU is in guest-mode */ 1830 #define HF_SMM_MASK (1 << 6) 1831 #define HF_SMM_INSIDE_NMI_MASK (1 << 7) 1832 1833 #define __KVM_VCPU_MULTIPLE_ADDRESS_SPACE 1834 #define KVM_ADDRESS_SPACE_NUM 2 1835 1836 #define kvm_arch_vcpu_memslots_id(vcpu) ((vcpu)->arch.hflags & HF_SMM_MASK ? 1 : 0) 1837 #define kvm_memslots_for_spte_role(kvm, role) __kvm_memslots(kvm, (role).smm) 1838 1839 #define KVM_ARCH_WANT_MMU_NOTIFIER 1840 1841 int kvm_cpu_has_injectable_intr(struct kvm_vcpu *v); 1842 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu); 1843 int kvm_cpu_has_extint(struct kvm_vcpu *v); 1844 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu); 1845 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 1846 void kvm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event); 1847 void kvm_vcpu_reload_apic_access_page(struct kvm_vcpu *vcpu); 1848 1849 int kvm_pv_send_ipi(struct kvm *kvm, unsigned long ipi_bitmap_low, 1850 unsigned long ipi_bitmap_high, u32 min, 1851 unsigned long icr, int op_64_bit); 1852 1853 int kvm_add_user_return_msr(u32 msr); 1854 int kvm_find_user_return_msr(u32 msr); 1855 int kvm_set_user_return_msr(unsigned index, u64 val, u64 mask); 1856 1857 static inline bool kvm_is_supported_user_return_msr(u32 msr) 1858 { 1859 return kvm_find_user_return_msr(msr) >= 0; 1860 } 1861 1862 u64 kvm_scale_tsc(struct kvm_vcpu *vcpu, u64 tsc, u64 ratio); 1863 u64 kvm_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc); 1864 u64 kvm_calc_nested_tsc_offset(u64 l1_offset, u64 l2_offset, u64 l2_multiplier); 1865 u64 kvm_calc_nested_tsc_multiplier(u64 l1_multiplier, u64 l2_multiplier); 1866 1867 unsigned long kvm_get_linear_rip(struct kvm_vcpu *vcpu); 1868 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip); 1869 1870 void kvm_make_mclock_inprogress_request(struct kvm *kvm); 1871 void kvm_make_scan_ioapic_request(struct kvm *kvm); 1872 void kvm_make_scan_ioapic_request_mask(struct kvm *kvm, 1873 unsigned long *vcpu_bitmap); 1874 1875 bool kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, 1876 struct kvm_async_pf *work); 1877 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, 1878 struct kvm_async_pf *work); 1879 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, 1880 struct kvm_async_pf *work); 1881 void kvm_arch_async_page_present_queued(struct kvm_vcpu *vcpu); 1882 bool kvm_arch_can_dequeue_async_page_present(struct kvm_vcpu *vcpu); 1883 extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn); 1884 1885 int kvm_skip_emulated_instruction(struct kvm_vcpu *vcpu); 1886 int kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err); 1887 void __kvm_request_immediate_exit(struct kvm_vcpu *vcpu); 1888 1889 int kvm_is_in_guest(void); 1890 1891 void __user *__x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, 1892 u32 size); 1893 bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu); 1894 bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu); 1895 1896 bool kvm_intr_is_single_vcpu(struct kvm *kvm, struct kvm_lapic_irq *irq, 1897 struct kvm_vcpu **dest_vcpu); 1898 1899 void kvm_set_msi_irq(struct kvm *kvm, struct kvm_kernel_irq_routing_entry *e, 1900 struct kvm_lapic_irq *irq); 1901 1902 static inline bool kvm_irq_is_postable(struct kvm_lapic_irq *irq) 1903 { 1904 /* We can only post Fixed and LowPrio IRQs */ 1905 return (irq->delivery_mode == APIC_DM_FIXED || 1906 irq->delivery_mode == APIC_DM_LOWEST); 1907 } 1908 1909 static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) 1910 { 1911 static_call_cond(kvm_x86_vcpu_blocking)(vcpu); 1912 } 1913 1914 static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) 1915 { 1916 static_call_cond(kvm_x86_vcpu_unblocking)(vcpu); 1917 } 1918 1919 static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {} 1920 1921 static inline int kvm_cpu_get_apicid(int mps_cpu) 1922 { 1923 #ifdef CONFIG_X86_LOCAL_APIC 1924 return default_cpu_present_to_apicid(mps_cpu); 1925 #else 1926 WARN_ON_ONCE(1); 1927 return BAD_APICID; 1928 #endif 1929 } 1930 1931 #define put_smstate(type, buf, offset, val) \ 1932 *(type *)((buf) + (offset) - 0x7e00) = val 1933 1934 #define GET_SMSTATE(type, buf, offset) \ 1935 (*(type *)((buf) + (offset) - 0x7e00)) 1936 1937 int kvm_cpu_dirty_log_size(void); 1938 1939 int alloc_all_memslots_rmaps(struct kvm *kvm); 1940 1941 #endif /* _ASM_X86_KVM_HOST_H */ 1942