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 28 #include <asm/pvclock-abi.h> 29 #include <asm/desc.h> 30 #include <asm/mtrr.h> 31 #include <asm/msr-index.h> 32 #include <asm/asm.h> 33 34 #define KVM_MAX_VCPUS 255 35 #define KVM_SOFT_MAX_VCPUS 160 36 #define KVM_USER_MEM_SLOTS 125 37 /* memory slots that are not exposed to userspace */ 38 #define KVM_PRIVATE_MEM_SLOTS 3 39 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS) 40 41 #define KVM_MMIO_SIZE 16 42 43 #define KVM_PIO_PAGE_OFFSET 1 44 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2 45 46 #define KVM_IRQCHIP_NUM_PINS KVM_IOAPIC_NUM_PINS 47 48 #define CR0_RESERVED_BITS \ 49 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ 50 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ 51 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) 52 53 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1) 54 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD)) 55 #define CR3_PCID_ENABLED_RESERVED_BITS 0xFFFFFF0000000000ULL 56 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \ 57 0xFFFFFF0000000000ULL) 58 #define CR4_RESERVED_BITS \ 59 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ 60 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ 61 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR | X86_CR4_PCIDE \ 62 | X86_CR4_OSXSAVE | X86_CR4_SMEP | X86_CR4_RDWRGSFS \ 63 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) 64 65 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) 66 67 68 69 #define INVALID_PAGE (~(hpa_t)0) 70 #define VALID_PAGE(x) ((x) != INVALID_PAGE) 71 72 #define UNMAPPED_GVA (~(gpa_t)0) 73 74 /* KVM Hugepage definitions for x86 */ 75 #define KVM_NR_PAGE_SIZES 3 76 #define KVM_HPAGE_GFN_SHIFT(x) (((x) - 1) * 9) 77 #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + KVM_HPAGE_GFN_SHIFT(x)) 78 #define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x)) 79 #define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1)) 80 #define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE) 81 82 #define SELECTOR_TI_MASK (1 << 2) 83 #define SELECTOR_RPL_MASK 0x03 84 85 #define IOPL_SHIFT 12 86 87 #define KVM_PERMILLE_MMU_PAGES 20 88 #define KVM_MIN_ALLOC_MMU_PAGES 64 89 #define KVM_MMU_HASH_SHIFT 10 90 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT) 91 #define KVM_MIN_FREE_MMU_PAGES 5 92 #define KVM_REFILL_PAGES 25 93 #define KVM_MAX_CPUID_ENTRIES 80 94 #define KVM_NR_FIXED_MTRR_REGION 88 95 #define KVM_NR_VAR_MTRR 8 96 97 #define ASYNC_PF_PER_VCPU 64 98 99 struct kvm_vcpu; 100 struct kvm; 101 struct kvm_async_pf; 102 103 enum kvm_reg { 104 VCPU_REGS_RAX = 0, 105 VCPU_REGS_RCX = 1, 106 VCPU_REGS_RDX = 2, 107 VCPU_REGS_RBX = 3, 108 VCPU_REGS_RSP = 4, 109 VCPU_REGS_RBP = 5, 110 VCPU_REGS_RSI = 6, 111 VCPU_REGS_RDI = 7, 112 #ifdef CONFIG_X86_64 113 VCPU_REGS_R8 = 8, 114 VCPU_REGS_R9 = 9, 115 VCPU_REGS_R10 = 10, 116 VCPU_REGS_R11 = 11, 117 VCPU_REGS_R12 = 12, 118 VCPU_REGS_R13 = 13, 119 VCPU_REGS_R14 = 14, 120 VCPU_REGS_R15 = 15, 121 #endif 122 VCPU_REGS_RIP, 123 NR_VCPU_REGS 124 }; 125 126 enum kvm_reg_ex { 127 VCPU_EXREG_PDPTR = NR_VCPU_REGS, 128 VCPU_EXREG_CR3, 129 VCPU_EXREG_RFLAGS, 130 VCPU_EXREG_CPL, 131 VCPU_EXREG_SEGMENTS, 132 }; 133 134 enum { 135 VCPU_SREG_ES, 136 VCPU_SREG_CS, 137 VCPU_SREG_SS, 138 VCPU_SREG_DS, 139 VCPU_SREG_FS, 140 VCPU_SREG_GS, 141 VCPU_SREG_TR, 142 VCPU_SREG_LDTR, 143 }; 144 145 #include <asm/kvm_emulate.h> 146 147 #define KVM_NR_MEM_OBJS 40 148 149 #define KVM_NR_DB_REGS 4 150 151 #define DR6_BD (1 << 13) 152 #define DR6_BS (1 << 14) 153 #define DR6_FIXED_1 0xffff0ff0 154 #define DR6_VOLATILE 0x0000e00f 155 156 #define DR7_BP_EN_MASK 0x000000ff 157 #define DR7_GE (1 << 9) 158 #define DR7_GD (1 << 13) 159 #define DR7_FIXED_1 0x00000400 160 #define DR7_VOLATILE 0xffff23ff 161 162 /* apic attention bits */ 163 #define KVM_APIC_CHECK_VAPIC 0 164 /* 165 * The following bit is set with PV-EOI, unset on EOI. 166 * We detect PV-EOI changes by guest by comparing 167 * this bit with PV-EOI in guest memory. 168 * See the implementation in apic_update_pv_eoi. 169 */ 170 #define KVM_APIC_PV_EOI_PENDING 1 171 172 /* 173 * We don't want allocation failures within the mmu code, so we preallocate 174 * enough memory for a single page fault in a cache. 175 */ 176 struct kvm_mmu_memory_cache { 177 int nobjs; 178 void *objects[KVM_NR_MEM_OBJS]; 179 }; 180 181 /* 182 * kvm_mmu_page_role, below, is defined as: 183 * 184 * bits 0:3 - total guest paging levels (2-4, or zero for real mode) 185 * bits 4:7 - page table level for this shadow (1-4) 186 * bits 8:9 - page table quadrant for 2-level guests 187 * bit 16 - direct mapping of virtual to physical mapping at gfn 188 * used for real mode and two-dimensional paging 189 * bits 17:19 - common access permissions for all ptes in this shadow page 190 */ 191 union kvm_mmu_page_role { 192 unsigned word; 193 struct { 194 unsigned level:4; 195 unsigned cr4_pae:1; 196 unsigned quadrant:2; 197 unsigned pad_for_nice_hex_output:6; 198 unsigned direct:1; 199 unsigned access:3; 200 unsigned invalid:1; 201 unsigned nxe:1; 202 unsigned cr0_wp:1; 203 unsigned smep_andnot_wp:1; 204 }; 205 }; 206 207 struct kvm_mmu_page { 208 struct list_head link; 209 struct hlist_node hash_link; 210 211 /* 212 * The following two entries are used to key the shadow page in the 213 * hash table. 214 */ 215 gfn_t gfn; 216 union kvm_mmu_page_role role; 217 218 u64 *spt; 219 /* hold the gfn of each spte inside spt */ 220 gfn_t *gfns; 221 bool unsync; 222 int root_count; /* Currently serving as active root */ 223 unsigned int unsync_children; 224 unsigned long parent_ptes; /* Reverse mapping for parent_pte */ 225 DECLARE_BITMAP(unsync_child_bitmap, 512); 226 227 #ifdef CONFIG_X86_32 228 int clear_spte_count; 229 #endif 230 231 int write_flooding_count; 232 bool mmio_cached; 233 }; 234 235 struct kvm_pio_request { 236 unsigned long count; 237 int in; 238 int port; 239 int size; 240 }; 241 242 /* 243 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level 244 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu 245 * mode. 246 */ 247 struct kvm_mmu { 248 void (*new_cr3)(struct kvm_vcpu *vcpu); 249 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root); 250 unsigned long (*get_cr3)(struct kvm_vcpu *vcpu); 251 u64 (*get_pdptr)(struct kvm_vcpu *vcpu, int index); 252 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err, 253 bool prefault); 254 void (*inject_page_fault)(struct kvm_vcpu *vcpu, 255 struct x86_exception *fault); 256 void (*free)(struct kvm_vcpu *vcpu); 257 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access, 258 struct x86_exception *exception); 259 gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access); 260 int (*sync_page)(struct kvm_vcpu *vcpu, 261 struct kvm_mmu_page *sp); 262 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva); 263 void (*update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, 264 u64 *spte, const void *pte); 265 hpa_t root_hpa; 266 int root_level; 267 int shadow_root_level; 268 union kvm_mmu_page_role base_role; 269 bool direct_map; 270 271 /* 272 * Bitmap; bit set = permission fault 273 * Byte index: page fault error code [4:1] 274 * Bit index: pte permissions in ACC_* format 275 */ 276 u8 permissions[16]; 277 278 u64 *pae_root; 279 u64 *lm_root; 280 u64 rsvd_bits_mask[2][4]; 281 282 /* 283 * Bitmap: bit set = last pte in walk 284 * index[0:1]: level (zero-based) 285 * index[2]: pte.ps 286 */ 287 u8 last_pte_bitmap; 288 289 bool nx; 290 291 u64 pdptrs[4]; /* pae */ 292 }; 293 294 enum pmc_type { 295 KVM_PMC_GP = 0, 296 KVM_PMC_FIXED, 297 }; 298 299 struct kvm_pmc { 300 enum pmc_type type; 301 u8 idx; 302 u64 counter; 303 u64 eventsel; 304 struct perf_event *perf_event; 305 struct kvm_vcpu *vcpu; 306 }; 307 308 struct kvm_pmu { 309 unsigned nr_arch_gp_counters; 310 unsigned nr_arch_fixed_counters; 311 unsigned available_event_types; 312 u64 fixed_ctr_ctrl; 313 u64 global_ctrl; 314 u64 global_status; 315 u64 global_ovf_ctrl; 316 u64 counter_bitmask[2]; 317 u64 global_ctrl_mask; 318 u8 version; 319 struct kvm_pmc gp_counters[INTEL_PMC_MAX_GENERIC]; 320 struct kvm_pmc fixed_counters[INTEL_PMC_MAX_FIXED]; 321 struct irq_work irq_work; 322 u64 reprogram_pmi; 323 }; 324 325 struct kvm_vcpu_arch { 326 /* 327 * rip and regs accesses must go through 328 * kvm_{register,rip}_{read,write} functions. 329 */ 330 unsigned long regs[NR_VCPU_REGS]; 331 u32 regs_avail; 332 u32 regs_dirty; 333 334 unsigned long cr0; 335 unsigned long cr0_guest_owned_bits; 336 unsigned long cr2; 337 unsigned long cr3; 338 unsigned long cr4; 339 unsigned long cr4_guest_owned_bits; 340 unsigned long cr8; 341 u32 hflags; 342 u64 efer; 343 u64 apic_base; 344 struct kvm_lapic *apic; /* kernel irqchip context */ 345 unsigned long apic_attention; 346 int32_t apic_arb_prio; 347 int mp_state; 348 u64 ia32_misc_enable_msr; 349 bool tpr_access_reporting; 350 351 /* 352 * Paging state of the vcpu 353 * 354 * If the vcpu runs in guest mode with two level paging this still saves 355 * the paging mode of the l1 guest. This context is always used to 356 * handle faults. 357 */ 358 struct kvm_mmu mmu; 359 360 /* 361 * Paging state of an L2 guest (used for nested npt) 362 * 363 * This context will save all necessary information to walk page tables 364 * of the an L2 guest. This context is only initialized for page table 365 * walking and not for faulting since we never handle l2 page faults on 366 * the host. 367 */ 368 struct kvm_mmu nested_mmu; 369 370 /* 371 * Pointer to the mmu context currently used for 372 * gva_to_gpa translations. 373 */ 374 struct kvm_mmu *walk_mmu; 375 376 struct kvm_mmu_memory_cache mmu_pte_list_desc_cache; 377 struct kvm_mmu_memory_cache mmu_page_cache; 378 struct kvm_mmu_memory_cache mmu_page_header_cache; 379 380 struct fpu guest_fpu; 381 u64 xcr0; 382 383 struct kvm_pio_request pio; 384 void *pio_data; 385 386 u8 event_exit_inst_len; 387 388 struct kvm_queued_exception { 389 bool pending; 390 bool has_error_code; 391 bool reinject; 392 u8 nr; 393 u32 error_code; 394 } exception; 395 396 struct kvm_queued_interrupt { 397 bool pending; 398 bool soft; 399 u8 nr; 400 } interrupt; 401 402 int halt_request; /* real mode on Intel only */ 403 404 int cpuid_nent; 405 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES]; 406 /* emulate context */ 407 408 struct x86_emulate_ctxt emulate_ctxt; 409 bool emulate_regs_need_sync_to_vcpu; 410 bool emulate_regs_need_sync_from_vcpu; 411 int (*complete_userspace_io)(struct kvm_vcpu *vcpu); 412 413 gpa_t time; 414 struct pvclock_vcpu_time_info hv_clock; 415 unsigned int hw_tsc_khz; 416 struct gfn_to_hva_cache pv_time; 417 bool pv_time_enabled; 418 /* set guest stopped flag in pvclock flags field */ 419 bool pvclock_set_guest_stopped_request; 420 421 struct { 422 u64 msr_val; 423 u64 last_steal; 424 u64 accum_steal; 425 struct gfn_to_hva_cache stime; 426 struct kvm_steal_time steal; 427 } st; 428 429 u64 last_guest_tsc; 430 u64 last_kernel_ns; 431 u64 last_host_tsc; 432 u64 tsc_offset_adjustment; 433 u64 this_tsc_nsec; 434 u64 this_tsc_write; 435 u8 this_tsc_generation; 436 bool tsc_catchup; 437 bool tsc_always_catchup; 438 s8 virtual_tsc_shift; 439 u32 virtual_tsc_mult; 440 u32 virtual_tsc_khz; 441 s64 ia32_tsc_adjust_msr; 442 443 atomic_t nmi_queued; /* unprocessed asynchronous NMIs */ 444 unsigned nmi_pending; /* NMI queued after currently running handler */ 445 bool nmi_injected; /* Trying to inject an NMI this entry */ 446 447 struct mtrr_state_type mtrr_state; 448 u32 pat; 449 450 int switch_db_regs; 451 unsigned long db[KVM_NR_DB_REGS]; 452 unsigned long dr6; 453 unsigned long dr7; 454 unsigned long eff_db[KVM_NR_DB_REGS]; 455 unsigned long guest_debug_dr7; 456 457 u64 mcg_cap; 458 u64 mcg_status; 459 u64 mcg_ctl; 460 u64 *mce_banks; 461 462 /* Cache MMIO info */ 463 u64 mmio_gva; 464 unsigned access; 465 gfn_t mmio_gfn; 466 467 struct kvm_pmu pmu; 468 469 /* used for guest single stepping over the given code position */ 470 unsigned long singlestep_rip; 471 472 /* fields used by HYPER-V emulation */ 473 u64 hv_vapic; 474 475 cpumask_var_t wbinvd_dirty_mask; 476 477 unsigned long last_retry_eip; 478 unsigned long last_retry_addr; 479 480 struct { 481 bool halted; 482 gfn_t gfns[roundup_pow_of_two(ASYNC_PF_PER_VCPU)]; 483 struct gfn_to_hva_cache data; 484 u64 msr_val; 485 u32 id; 486 bool send_user_only; 487 } apf; 488 489 /* OSVW MSRs (AMD only) */ 490 struct { 491 u64 length; 492 u64 status; 493 } osvw; 494 495 struct { 496 u64 msr_val; 497 struct gfn_to_hva_cache data; 498 } pv_eoi; 499 500 /* 501 * Indicate whether the access faults on its page table in guest 502 * which is set when fix page fault and used to detect unhandeable 503 * instruction. 504 */ 505 bool write_fault_to_shadow_pgtable; 506 }; 507 508 struct kvm_lpage_info { 509 int write_count; 510 }; 511 512 struct kvm_arch_memory_slot { 513 unsigned long *rmap[KVM_NR_PAGE_SIZES]; 514 struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1]; 515 }; 516 517 struct kvm_apic_map { 518 struct rcu_head rcu; 519 u8 ldr_bits; 520 /* fields bellow are used to decode ldr values in different modes */ 521 u32 cid_shift, cid_mask, lid_mask; 522 struct kvm_lapic *phys_map[256]; 523 /* first index is cluster id second is cpu id in a cluster */ 524 struct kvm_lapic *logical_map[16][16]; 525 }; 526 527 struct kvm_arch { 528 unsigned int n_used_mmu_pages; 529 unsigned int n_requested_mmu_pages; 530 unsigned int n_max_mmu_pages; 531 unsigned int indirect_shadow_pages; 532 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES]; 533 /* 534 * Hash table of struct kvm_mmu_page. 535 */ 536 struct list_head active_mmu_pages; 537 struct list_head assigned_dev_head; 538 struct iommu_domain *iommu_domain; 539 int iommu_flags; 540 struct kvm_pic *vpic; 541 struct kvm_ioapic *vioapic; 542 struct kvm_pit *vpit; 543 int vapics_in_nmi_mode; 544 struct mutex apic_map_lock; 545 struct kvm_apic_map *apic_map; 546 547 unsigned int tss_addr; 548 struct page *apic_access_page; 549 550 gpa_t wall_clock; 551 552 struct page *ept_identity_pagetable; 553 bool ept_identity_pagetable_done; 554 gpa_t ept_identity_map_addr; 555 556 unsigned long irq_sources_bitmap; 557 s64 kvmclock_offset; 558 raw_spinlock_t tsc_write_lock; 559 u64 last_tsc_nsec; 560 u64 last_tsc_write; 561 u32 last_tsc_khz; 562 u64 cur_tsc_nsec; 563 u64 cur_tsc_write; 564 u64 cur_tsc_offset; 565 u8 cur_tsc_generation; 566 int nr_vcpus_matched_tsc; 567 568 spinlock_t pvclock_gtod_sync_lock; 569 bool use_master_clock; 570 u64 master_kernel_ns; 571 cycle_t master_cycle_now; 572 573 struct kvm_xen_hvm_config xen_hvm_config; 574 575 /* fields used by HYPER-V emulation */ 576 u64 hv_guest_os_id; 577 u64 hv_hypercall; 578 579 #ifdef CONFIG_KVM_MMU_AUDIT 580 int audit_point; 581 #endif 582 }; 583 584 struct kvm_vm_stat { 585 u32 mmu_shadow_zapped; 586 u32 mmu_pte_write; 587 u32 mmu_pte_updated; 588 u32 mmu_pde_zapped; 589 u32 mmu_flooded; 590 u32 mmu_recycled; 591 u32 mmu_cache_miss; 592 u32 mmu_unsync; 593 u32 remote_tlb_flush; 594 u32 lpages; 595 }; 596 597 struct kvm_vcpu_stat { 598 u32 pf_fixed; 599 u32 pf_guest; 600 u32 tlb_flush; 601 u32 invlpg; 602 603 u32 exits; 604 u32 io_exits; 605 u32 mmio_exits; 606 u32 signal_exits; 607 u32 irq_window_exits; 608 u32 nmi_window_exits; 609 u32 halt_exits; 610 u32 halt_wakeup; 611 u32 request_irq_exits; 612 u32 irq_exits; 613 u32 host_state_reload; 614 u32 efer_reload; 615 u32 fpu_reload; 616 u32 insn_emulation; 617 u32 insn_emulation_fail; 618 u32 hypercalls; 619 u32 irq_injections; 620 u32 nmi_injections; 621 }; 622 623 struct x86_instruction_info; 624 625 struct msr_data { 626 bool host_initiated; 627 u32 index; 628 u64 data; 629 }; 630 631 struct kvm_x86_ops { 632 int (*cpu_has_kvm_support)(void); /* __init */ 633 int (*disabled_by_bios)(void); /* __init */ 634 int (*hardware_enable)(void *dummy); 635 void (*hardware_disable)(void *dummy); 636 void (*check_processor_compatibility)(void *rtn); 637 int (*hardware_setup)(void); /* __init */ 638 void (*hardware_unsetup)(void); /* __exit */ 639 bool (*cpu_has_accelerated_tpr)(void); 640 void (*cpuid_update)(struct kvm_vcpu *vcpu); 641 642 /* Create, but do not attach this VCPU */ 643 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id); 644 void (*vcpu_free)(struct kvm_vcpu *vcpu); 645 void (*vcpu_reset)(struct kvm_vcpu *vcpu); 646 647 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu); 648 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu); 649 void (*vcpu_put)(struct kvm_vcpu *vcpu); 650 651 void (*update_db_bp_intercept)(struct kvm_vcpu *vcpu); 652 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata); 653 int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr); 654 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg); 655 void (*get_segment)(struct kvm_vcpu *vcpu, 656 struct kvm_segment *var, int seg); 657 int (*get_cpl)(struct kvm_vcpu *vcpu); 658 void (*set_segment)(struct kvm_vcpu *vcpu, 659 struct kvm_segment *var, int seg); 660 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l); 661 void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu); 662 void (*decache_cr3)(struct kvm_vcpu *vcpu); 663 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu); 664 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0); 665 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 666 int (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4); 667 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer); 668 void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 669 void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 670 void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 671 void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 672 void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value); 673 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg); 674 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu); 675 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags); 676 void (*fpu_activate)(struct kvm_vcpu *vcpu); 677 void (*fpu_deactivate)(struct kvm_vcpu *vcpu); 678 679 void (*tlb_flush)(struct kvm_vcpu *vcpu); 680 681 void (*run)(struct kvm_vcpu *vcpu); 682 int (*handle_exit)(struct kvm_vcpu *vcpu); 683 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu); 684 void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 685 u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 686 void (*patch_hypercall)(struct kvm_vcpu *vcpu, 687 unsigned char *hypercall_addr); 688 void (*set_irq)(struct kvm_vcpu *vcpu); 689 void (*set_nmi)(struct kvm_vcpu *vcpu); 690 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr, 691 bool has_error_code, u32 error_code, 692 bool reinject); 693 void (*cancel_injection)(struct kvm_vcpu *vcpu); 694 int (*interrupt_allowed)(struct kvm_vcpu *vcpu); 695 int (*nmi_allowed)(struct kvm_vcpu *vcpu); 696 bool (*get_nmi_mask)(struct kvm_vcpu *vcpu); 697 void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked); 698 int (*enable_nmi_window)(struct kvm_vcpu *vcpu); 699 int (*enable_irq_window)(struct kvm_vcpu *vcpu); 700 void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr); 701 int (*vm_has_apicv)(struct kvm *kvm); 702 void (*hwapic_irr_update)(struct kvm_vcpu *vcpu, int max_irr); 703 void (*hwapic_isr_update)(struct kvm *kvm, int isr); 704 void (*load_eoi_exitmap)(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap); 705 void (*set_virtual_x2apic_mode)(struct kvm_vcpu *vcpu, bool set); 706 void (*deliver_posted_interrupt)(struct kvm_vcpu *vcpu, int vector); 707 void (*sync_pir_to_irr)(struct kvm_vcpu *vcpu); 708 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr); 709 int (*get_tdp_level)(void); 710 u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio); 711 int (*get_lpage_level)(void); 712 bool (*rdtscp_supported)(void); 713 bool (*invpcid_supported)(void); 714 void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment, bool host); 715 716 void (*set_tdp_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 717 718 void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry); 719 720 bool (*has_wbinvd_exit)(void); 721 722 void (*set_tsc_khz)(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale); 723 u64 (*read_tsc_offset)(struct kvm_vcpu *vcpu); 724 void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset); 725 726 u64 (*compute_tsc_offset)(struct kvm_vcpu *vcpu, u64 target_tsc); 727 u64 (*read_l1_tsc)(struct kvm_vcpu *vcpu, u64 host_tsc); 728 729 void (*get_exit_info)(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2); 730 731 int (*check_intercept)(struct kvm_vcpu *vcpu, 732 struct x86_instruction_info *info, 733 enum x86_intercept_stage stage); 734 void (*handle_external_intr)(struct kvm_vcpu *vcpu); 735 }; 736 737 struct kvm_arch_async_pf { 738 u32 token; 739 gfn_t gfn; 740 unsigned long cr3; 741 bool direct_map; 742 }; 743 744 extern struct kvm_x86_ops *kvm_x86_ops; 745 746 static inline void adjust_tsc_offset_guest(struct kvm_vcpu *vcpu, 747 s64 adjustment) 748 { 749 kvm_x86_ops->adjust_tsc_offset(vcpu, adjustment, false); 750 } 751 752 static inline void adjust_tsc_offset_host(struct kvm_vcpu *vcpu, s64 adjustment) 753 { 754 kvm_x86_ops->adjust_tsc_offset(vcpu, adjustment, true); 755 } 756 757 int kvm_mmu_module_init(void); 758 void kvm_mmu_module_exit(void); 759 760 void kvm_mmu_destroy(struct kvm_vcpu *vcpu); 761 int kvm_mmu_create(struct kvm_vcpu *vcpu); 762 int kvm_mmu_setup(struct kvm_vcpu *vcpu); 763 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask, 764 u64 dirty_mask, u64 nx_mask, u64 x_mask); 765 766 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu); 767 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot); 768 void kvm_mmu_write_protect_pt_masked(struct kvm *kvm, 769 struct kvm_memory_slot *slot, 770 gfn_t gfn_offset, unsigned long mask); 771 void kvm_mmu_zap_all(struct kvm *kvm); 772 void kvm_mmu_zap_mmio_sptes(struct kvm *kvm); 773 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm); 774 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages); 775 776 int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3); 777 778 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, 779 const void *val, int bytes); 780 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn); 781 782 extern bool tdp_enabled; 783 784 u64 vcpu_tsc_khz(struct kvm_vcpu *vcpu); 785 786 /* control of guest tsc rate supported? */ 787 extern bool kvm_has_tsc_control; 788 /* minimum supported tsc_khz for guests */ 789 extern u32 kvm_min_guest_tsc_khz; 790 /* maximum supported tsc_khz for guests */ 791 extern u32 kvm_max_guest_tsc_khz; 792 793 enum emulation_result { 794 EMULATE_DONE, /* no further processing */ 795 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */ 796 EMULATE_FAIL, /* can't emulate this instruction */ 797 }; 798 799 #define EMULTYPE_NO_DECODE (1 << 0) 800 #define EMULTYPE_TRAP_UD (1 << 1) 801 #define EMULTYPE_SKIP (1 << 2) 802 #define EMULTYPE_RETRY (1 << 3) 803 #define EMULTYPE_NO_REEXECUTE (1 << 4) 804 int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2, 805 int emulation_type, void *insn, int insn_len); 806 807 static inline int emulate_instruction(struct kvm_vcpu *vcpu, 808 int emulation_type) 809 { 810 return x86_emulate_instruction(vcpu, 0, emulation_type, NULL, 0); 811 } 812 813 void kvm_enable_efer_bits(u64); 814 bool kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer); 815 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data); 816 int kvm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr); 817 818 struct x86_emulate_ctxt; 819 820 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port); 821 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu); 822 int kvm_emulate_halt(struct kvm_vcpu *vcpu); 823 int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu); 824 825 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); 826 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg); 827 void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, unsigned int vector); 828 829 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index, 830 int reason, bool has_error_code, u32 error_code); 831 832 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0); 833 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3); 834 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); 835 int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8); 836 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val); 837 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val); 838 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu); 839 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw); 840 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l); 841 int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr); 842 843 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata); 844 int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr); 845 846 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu); 847 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); 848 bool kvm_rdpmc(struct kvm_vcpu *vcpu); 849 850 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr); 851 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 852 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr); 853 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 854 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault); 855 int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, 856 gfn_t gfn, void *data, int offset, int len, 857 u32 access); 858 void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault); 859 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl); 860 861 static inline int __kvm_irq_line_state(unsigned long *irq_state, 862 int irq_source_id, int level) 863 { 864 /* Logical OR for level trig interrupt */ 865 if (level) 866 __set_bit(irq_source_id, irq_state); 867 else 868 __clear_bit(irq_source_id, irq_state); 869 870 return !!(*irq_state); 871 } 872 873 int kvm_pic_set_irq(struct kvm_pic *pic, int irq, int irq_source_id, int level); 874 void kvm_pic_clear_all(struct kvm_pic *pic, int irq_source_id); 875 876 void kvm_inject_nmi(struct kvm_vcpu *vcpu); 877 878 int fx_init(struct kvm_vcpu *vcpu); 879 880 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu); 881 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, 882 const u8 *new, int bytes); 883 int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn); 884 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva); 885 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu); 886 int kvm_mmu_load(struct kvm_vcpu *vcpu); 887 void kvm_mmu_unload(struct kvm_vcpu *vcpu); 888 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu); 889 gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access); 890 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, 891 struct x86_exception *exception); 892 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, 893 struct x86_exception *exception); 894 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, 895 struct x86_exception *exception); 896 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, 897 struct x86_exception *exception); 898 899 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu); 900 901 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code, 902 void *insn, int insn_len); 903 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva); 904 905 void kvm_enable_tdp(void); 906 void kvm_disable_tdp(void); 907 908 int complete_pio(struct kvm_vcpu *vcpu); 909 bool kvm_check_iopl(struct kvm_vcpu *vcpu); 910 911 static inline gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) 912 { 913 return gpa; 914 } 915 916 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page) 917 { 918 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT); 919 920 return (struct kvm_mmu_page *)page_private(page); 921 } 922 923 static inline u16 kvm_read_ldt(void) 924 { 925 u16 ldt; 926 asm("sldt %0" : "=g"(ldt)); 927 return ldt; 928 } 929 930 static inline void kvm_load_ldt(u16 sel) 931 { 932 asm("lldt %0" : : "rm"(sel)); 933 } 934 935 #ifdef CONFIG_X86_64 936 static inline unsigned long read_msr(unsigned long msr) 937 { 938 u64 value; 939 940 rdmsrl(msr, value); 941 return value; 942 } 943 #endif 944 945 static inline u32 get_rdx_init_val(void) 946 { 947 return 0x600; /* P6 family */ 948 } 949 950 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code) 951 { 952 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code); 953 } 954 955 #define TSS_IOPB_BASE_OFFSET 0x66 956 #define TSS_BASE_SIZE 0x68 957 #define TSS_IOPB_SIZE (65536 / 8) 958 #define TSS_REDIRECTION_SIZE (256 / 8) 959 #define RMODE_TSS_SIZE \ 960 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1) 961 962 enum { 963 TASK_SWITCH_CALL = 0, 964 TASK_SWITCH_IRET = 1, 965 TASK_SWITCH_JMP = 2, 966 TASK_SWITCH_GATE = 3, 967 }; 968 969 #define HF_GIF_MASK (1 << 0) 970 #define HF_HIF_MASK (1 << 1) 971 #define HF_VINTR_MASK (1 << 2) 972 #define HF_NMI_MASK (1 << 3) 973 #define HF_IRET_MASK (1 << 4) 974 #define HF_GUEST_MASK (1 << 5) /* VCPU is in guest-mode */ 975 976 /* 977 * Hardware virtualization extension instructions may fault if a 978 * reboot turns off virtualization while processes are running. 979 * Trap the fault and ignore the instruction if that happens. 980 */ 981 asmlinkage void kvm_spurious_fault(void); 982 983 #define ____kvm_handle_fault_on_reboot(insn, cleanup_insn) \ 984 "666: " insn "\n\t" \ 985 "668: \n\t" \ 986 ".pushsection .fixup, \"ax\" \n" \ 987 "667: \n\t" \ 988 cleanup_insn "\n\t" \ 989 "cmpb $0, kvm_rebooting \n\t" \ 990 "jne 668b \n\t" \ 991 __ASM_SIZE(push) " $666b \n\t" \ 992 "call kvm_spurious_fault \n\t" \ 993 ".popsection \n\t" \ 994 _ASM_EXTABLE(666b, 667b) 995 996 #define __kvm_handle_fault_on_reboot(insn) \ 997 ____kvm_handle_fault_on_reboot(insn, "") 998 999 #define KVM_ARCH_WANT_MMU_NOTIFIER 1000 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 1001 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end); 1002 int kvm_age_hva(struct kvm *kvm, unsigned long hva); 1003 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); 1004 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 1005 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu); 1006 int kvm_cpu_has_injectable_intr(struct kvm_vcpu *v); 1007 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu); 1008 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu); 1009 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 1010 void kvm_vcpu_reset(struct kvm_vcpu *vcpu); 1011 1012 void kvm_define_shared_msr(unsigned index, u32 msr); 1013 void kvm_set_shared_msr(unsigned index, u64 val, u64 mask); 1014 1015 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip); 1016 1017 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, 1018 struct kvm_async_pf *work); 1019 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, 1020 struct kvm_async_pf *work); 1021 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, 1022 struct kvm_async_pf *work); 1023 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu); 1024 extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn); 1025 1026 void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err); 1027 1028 int kvm_is_in_guest(void); 1029 1030 void kvm_pmu_init(struct kvm_vcpu *vcpu); 1031 void kvm_pmu_destroy(struct kvm_vcpu *vcpu); 1032 void kvm_pmu_reset(struct kvm_vcpu *vcpu); 1033 void kvm_pmu_cpuid_update(struct kvm_vcpu *vcpu); 1034 bool kvm_pmu_msr(struct kvm_vcpu *vcpu, u32 msr); 1035 int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *data); 1036 int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info); 1037 int kvm_pmu_read_pmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data); 1038 void kvm_handle_pmu_event(struct kvm_vcpu *vcpu); 1039 void kvm_deliver_pmi(struct kvm_vcpu *vcpu); 1040 1041 #endif /* _ASM_X86_KVM_HOST_H */ 1042