1 /* 2 * Kernel-based Virtual Machine driver for Linux 3 * 4 * This header defines architecture specific interfaces, x86 version 5 * 6 * This work is licensed under the terms of the GNU GPL, version 2. See 7 * the COPYING file in the top-level directory. 8 * 9 */ 10 11 #ifndef _ASM_X86_KVM_HOST_H 12 #define _ASM_X86_KVM_HOST_H 13 14 #include <linux/types.h> 15 #include <linux/mm.h> 16 #include <linux/mmu_notifier.h> 17 #include <linux/tracepoint.h> 18 #include <linux/cpumask.h> 19 #include <linux/irq_work.h> 20 21 #include <linux/kvm.h> 22 #include <linux/kvm_para.h> 23 #include <linux/kvm_types.h> 24 #include <linux/perf_event.h> 25 26 #include <asm/pvclock-abi.h> 27 #include <asm/desc.h> 28 #include <asm/mtrr.h> 29 #include <asm/msr-index.h> 30 31 #define KVM_MAX_VCPUS 254 32 #define KVM_SOFT_MAX_VCPUS 160 33 #define KVM_MEMORY_SLOTS 32 34 /* memory slots that does not exposed to userspace */ 35 #define KVM_PRIVATE_MEM_SLOTS 4 36 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS) 37 38 #define KVM_MMIO_SIZE 16 39 40 #define KVM_PIO_PAGE_OFFSET 1 41 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2 42 43 #define CR0_RESERVED_BITS \ 44 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ 45 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ 46 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) 47 48 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1) 49 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD)) 50 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \ 51 0xFFFFFF0000000000ULL) 52 #define CR4_RESERVED_BITS \ 53 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ 54 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ 55 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ 56 | X86_CR4_OSXSAVE | X86_CR4_SMEP | X86_CR4_RDWRGSFS \ 57 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) 58 59 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) 60 61 62 63 #define INVALID_PAGE (~(hpa_t)0) 64 #define VALID_PAGE(x) ((x) != INVALID_PAGE) 65 66 #define UNMAPPED_GVA (~(gpa_t)0) 67 68 /* KVM Hugepage definitions for x86 */ 69 #define KVM_NR_PAGE_SIZES 3 70 #define KVM_HPAGE_GFN_SHIFT(x) (((x) - 1) * 9) 71 #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + KVM_HPAGE_GFN_SHIFT(x)) 72 #define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x)) 73 #define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1)) 74 #define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE) 75 76 #define DE_VECTOR 0 77 #define DB_VECTOR 1 78 #define BP_VECTOR 3 79 #define OF_VECTOR 4 80 #define BR_VECTOR 5 81 #define UD_VECTOR 6 82 #define NM_VECTOR 7 83 #define DF_VECTOR 8 84 #define TS_VECTOR 10 85 #define NP_VECTOR 11 86 #define SS_VECTOR 12 87 #define GP_VECTOR 13 88 #define PF_VECTOR 14 89 #define MF_VECTOR 16 90 #define MC_VECTOR 18 91 92 #define SELECTOR_TI_MASK (1 << 2) 93 #define SELECTOR_RPL_MASK 0x03 94 95 #define IOPL_SHIFT 12 96 97 #define KVM_PERMILLE_MMU_PAGES 20 98 #define KVM_MIN_ALLOC_MMU_PAGES 64 99 #define KVM_MMU_HASH_SHIFT 10 100 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT) 101 #define KVM_MIN_FREE_MMU_PAGES 5 102 #define KVM_REFILL_PAGES 25 103 #define KVM_MAX_CPUID_ENTRIES 80 104 #define KVM_NR_FIXED_MTRR_REGION 88 105 #define KVM_NR_VAR_MTRR 8 106 107 #define ASYNC_PF_PER_VCPU 64 108 109 extern raw_spinlock_t kvm_lock; 110 extern struct list_head vm_list; 111 112 struct kvm_vcpu; 113 struct kvm; 114 struct kvm_async_pf; 115 116 enum kvm_reg { 117 VCPU_REGS_RAX = 0, 118 VCPU_REGS_RCX = 1, 119 VCPU_REGS_RDX = 2, 120 VCPU_REGS_RBX = 3, 121 VCPU_REGS_RSP = 4, 122 VCPU_REGS_RBP = 5, 123 VCPU_REGS_RSI = 6, 124 VCPU_REGS_RDI = 7, 125 #ifdef CONFIG_X86_64 126 VCPU_REGS_R8 = 8, 127 VCPU_REGS_R9 = 9, 128 VCPU_REGS_R10 = 10, 129 VCPU_REGS_R11 = 11, 130 VCPU_REGS_R12 = 12, 131 VCPU_REGS_R13 = 13, 132 VCPU_REGS_R14 = 14, 133 VCPU_REGS_R15 = 15, 134 #endif 135 VCPU_REGS_RIP, 136 NR_VCPU_REGS 137 }; 138 139 enum kvm_reg_ex { 140 VCPU_EXREG_PDPTR = NR_VCPU_REGS, 141 VCPU_EXREG_CR3, 142 VCPU_EXREG_RFLAGS, 143 VCPU_EXREG_CPL, 144 VCPU_EXREG_SEGMENTS, 145 }; 146 147 enum { 148 VCPU_SREG_ES, 149 VCPU_SREG_CS, 150 VCPU_SREG_SS, 151 VCPU_SREG_DS, 152 VCPU_SREG_FS, 153 VCPU_SREG_GS, 154 VCPU_SREG_TR, 155 VCPU_SREG_LDTR, 156 }; 157 158 #include <asm/kvm_emulate.h> 159 160 #define KVM_NR_MEM_OBJS 40 161 162 #define KVM_NR_DB_REGS 4 163 164 #define DR6_BD (1 << 13) 165 #define DR6_BS (1 << 14) 166 #define DR6_FIXED_1 0xffff0ff0 167 #define DR6_VOLATILE 0x0000e00f 168 169 #define DR7_BP_EN_MASK 0x000000ff 170 #define DR7_GE (1 << 9) 171 #define DR7_GD (1 << 13) 172 #define DR7_FIXED_1 0x00000400 173 #define DR7_VOLATILE 0xffff23ff 174 175 /* 176 * We don't want allocation failures within the mmu code, so we preallocate 177 * enough memory for a single page fault in a cache. 178 */ 179 struct kvm_mmu_memory_cache { 180 int nobjs; 181 void *objects[KVM_NR_MEM_OBJS]; 182 }; 183 184 /* 185 * kvm_mmu_page_role, below, is defined as: 186 * 187 * bits 0:3 - total guest paging levels (2-4, or zero for real mode) 188 * bits 4:7 - page table level for this shadow (1-4) 189 * bits 8:9 - page table quadrant for 2-level guests 190 * bit 16 - direct mapping of virtual to physical mapping at gfn 191 * used for real mode and two-dimensional paging 192 * bits 17:19 - common access permissions for all ptes in this shadow page 193 */ 194 union kvm_mmu_page_role { 195 unsigned word; 196 struct { 197 unsigned level:4; 198 unsigned cr4_pae:1; 199 unsigned quadrant:2; 200 unsigned pad_for_nice_hex_output:6; 201 unsigned direct:1; 202 unsigned access:3; 203 unsigned invalid:1; 204 unsigned nxe:1; 205 unsigned cr0_wp:1; 206 unsigned smep_andnot_wp:1; 207 }; 208 }; 209 210 struct kvm_mmu_page { 211 struct list_head link; 212 struct hlist_node hash_link; 213 214 /* 215 * The following two entries are used to key the shadow page in the 216 * hash table. 217 */ 218 gfn_t gfn; 219 union kvm_mmu_page_role role; 220 221 u64 *spt; 222 /* hold the gfn of each spte inside spt */ 223 gfn_t *gfns; 224 /* 225 * One bit set per slot which has memory 226 * in this shadow page. 227 */ 228 DECLARE_BITMAP(slot_bitmap, KVM_MEM_SLOTS_NUM); 229 bool unsync; 230 int root_count; /* Currently serving as active root */ 231 unsigned int unsync_children; 232 unsigned long parent_ptes; /* Reverse mapping for parent_pte */ 233 DECLARE_BITMAP(unsync_child_bitmap, 512); 234 235 #ifdef CONFIG_X86_32 236 int clear_spte_count; 237 #endif 238 239 int write_flooding_count; 240 241 struct rcu_head rcu; 242 }; 243 244 struct kvm_pio_request { 245 unsigned long count; 246 int in; 247 int port; 248 int size; 249 }; 250 251 /* 252 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level 253 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu 254 * mode. 255 */ 256 struct kvm_mmu { 257 void (*new_cr3)(struct kvm_vcpu *vcpu); 258 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root); 259 unsigned long (*get_cr3)(struct kvm_vcpu *vcpu); 260 u64 (*get_pdptr)(struct kvm_vcpu *vcpu, int index); 261 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err, 262 bool prefault); 263 void (*inject_page_fault)(struct kvm_vcpu *vcpu, 264 struct x86_exception *fault); 265 void (*free)(struct kvm_vcpu *vcpu); 266 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access, 267 struct x86_exception *exception); 268 gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access); 269 int (*sync_page)(struct kvm_vcpu *vcpu, 270 struct kvm_mmu_page *sp); 271 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva); 272 void (*update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, 273 u64 *spte, const void *pte); 274 hpa_t root_hpa; 275 int root_level; 276 int shadow_root_level; 277 union kvm_mmu_page_role base_role; 278 bool direct_map; 279 280 u64 *pae_root; 281 u64 *lm_root; 282 u64 rsvd_bits_mask[2][4]; 283 284 bool nx; 285 286 u64 pdptrs[4]; /* pae */ 287 }; 288 289 enum pmc_type { 290 KVM_PMC_GP = 0, 291 KVM_PMC_FIXED, 292 }; 293 294 struct kvm_pmc { 295 enum pmc_type type; 296 u8 idx; 297 u64 counter; 298 u64 eventsel; 299 struct perf_event *perf_event; 300 struct kvm_vcpu *vcpu; 301 }; 302 303 struct kvm_pmu { 304 unsigned nr_arch_gp_counters; 305 unsigned nr_arch_fixed_counters; 306 unsigned available_event_types; 307 u64 fixed_ctr_ctrl; 308 u64 global_ctrl; 309 u64 global_status; 310 u64 global_ovf_ctrl; 311 u64 counter_bitmask[2]; 312 u64 global_ctrl_mask; 313 u8 version; 314 struct kvm_pmc gp_counters[X86_PMC_MAX_GENERIC]; 315 struct kvm_pmc fixed_counters[X86_PMC_MAX_FIXED]; 316 struct irq_work irq_work; 317 u64 reprogram_pmi; 318 }; 319 320 struct kvm_vcpu_arch { 321 /* 322 * rip and regs accesses must go through 323 * kvm_{register,rip}_{read,write} functions. 324 */ 325 unsigned long regs[NR_VCPU_REGS]; 326 u32 regs_avail; 327 u32 regs_dirty; 328 329 unsigned long cr0; 330 unsigned long cr0_guest_owned_bits; 331 unsigned long cr2; 332 unsigned long cr3; 333 unsigned long cr4; 334 unsigned long cr4_guest_owned_bits; 335 unsigned long cr8; 336 u32 hflags; 337 u64 efer; 338 u64 apic_base; 339 struct kvm_lapic *apic; /* kernel irqchip context */ 340 int32_t apic_arb_prio; 341 int mp_state; 342 int sipi_vector; 343 u64 ia32_misc_enable_msr; 344 bool tpr_access_reporting; 345 346 /* 347 * Paging state of the vcpu 348 * 349 * If the vcpu runs in guest mode with two level paging this still saves 350 * the paging mode of the l1 guest. This context is always used to 351 * handle faults. 352 */ 353 struct kvm_mmu mmu; 354 355 /* 356 * Paging state of an L2 guest (used for nested npt) 357 * 358 * This context will save all necessary information to walk page tables 359 * of the an L2 guest. This context is only initialized for page table 360 * walking and not for faulting since we never handle l2 page faults on 361 * the host. 362 */ 363 struct kvm_mmu nested_mmu; 364 365 /* 366 * Pointer to the mmu context currently used for 367 * gva_to_gpa translations. 368 */ 369 struct kvm_mmu *walk_mmu; 370 371 struct kvm_mmu_memory_cache mmu_pte_list_desc_cache; 372 struct kvm_mmu_memory_cache mmu_page_cache; 373 struct kvm_mmu_memory_cache mmu_page_header_cache; 374 375 struct fpu guest_fpu; 376 u64 xcr0; 377 378 struct kvm_pio_request pio; 379 void *pio_data; 380 381 u8 event_exit_inst_len; 382 383 struct kvm_queued_exception { 384 bool pending; 385 bool has_error_code; 386 bool reinject; 387 u8 nr; 388 u32 error_code; 389 } exception; 390 391 struct kvm_queued_interrupt { 392 bool pending; 393 bool soft; 394 u8 nr; 395 } interrupt; 396 397 int halt_request; /* real mode on Intel only */ 398 399 int cpuid_nent; 400 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES]; 401 /* emulate context */ 402 403 struct x86_emulate_ctxt emulate_ctxt; 404 bool emulate_regs_need_sync_to_vcpu; 405 bool emulate_regs_need_sync_from_vcpu; 406 407 gpa_t time; 408 struct pvclock_vcpu_time_info hv_clock; 409 unsigned int hw_tsc_khz; 410 unsigned int time_offset; 411 struct page *time_page; 412 413 struct { 414 u64 msr_val; 415 u64 last_steal; 416 u64 accum_steal; 417 struct gfn_to_hva_cache stime; 418 struct kvm_steal_time steal; 419 } st; 420 421 u64 last_guest_tsc; 422 u64 last_kernel_ns; 423 u64 last_host_tsc; 424 u64 tsc_offset_adjustment; 425 u64 this_tsc_nsec; 426 u64 this_tsc_write; 427 u8 this_tsc_generation; 428 bool tsc_catchup; 429 bool tsc_always_catchup; 430 s8 virtual_tsc_shift; 431 u32 virtual_tsc_mult; 432 u32 virtual_tsc_khz; 433 434 atomic_t nmi_queued; /* unprocessed asynchronous NMIs */ 435 unsigned nmi_pending; /* NMI queued after currently running handler */ 436 bool nmi_injected; /* Trying to inject an NMI this entry */ 437 438 struct mtrr_state_type mtrr_state; 439 u32 pat; 440 441 int switch_db_regs; 442 unsigned long db[KVM_NR_DB_REGS]; 443 unsigned long dr6; 444 unsigned long dr7; 445 unsigned long eff_db[KVM_NR_DB_REGS]; 446 447 u64 mcg_cap; 448 u64 mcg_status; 449 u64 mcg_ctl; 450 u64 *mce_banks; 451 452 /* Cache MMIO info */ 453 u64 mmio_gva; 454 unsigned access; 455 gfn_t mmio_gfn; 456 457 struct kvm_pmu pmu; 458 459 /* used for guest single stepping over the given code position */ 460 unsigned long singlestep_rip; 461 462 /* fields used by HYPER-V emulation */ 463 u64 hv_vapic; 464 465 cpumask_var_t wbinvd_dirty_mask; 466 467 unsigned long last_retry_eip; 468 unsigned long last_retry_addr; 469 470 struct { 471 bool halted; 472 gfn_t gfns[roundup_pow_of_two(ASYNC_PF_PER_VCPU)]; 473 struct gfn_to_hva_cache data; 474 u64 msr_val; 475 u32 id; 476 bool send_user_only; 477 } apf; 478 479 /* OSVW MSRs (AMD only) */ 480 struct { 481 u64 length; 482 u64 status; 483 } osvw; 484 }; 485 486 struct kvm_lpage_info { 487 unsigned long rmap_pde; 488 int write_count; 489 }; 490 491 struct kvm_arch_memory_slot { 492 struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1]; 493 }; 494 495 struct kvm_arch { 496 unsigned int n_used_mmu_pages; 497 unsigned int n_requested_mmu_pages; 498 unsigned int n_max_mmu_pages; 499 unsigned int indirect_shadow_pages; 500 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES]; 501 /* 502 * Hash table of struct kvm_mmu_page. 503 */ 504 struct list_head active_mmu_pages; 505 struct list_head assigned_dev_head; 506 struct iommu_domain *iommu_domain; 507 int iommu_flags; 508 struct kvm_pic *vpic; 509 struct kvm_ioapic *vioapic; 510 struct kvm_pit *vpit; 511 int vapics_in_nmi_mode; 512 513 unsigned int tss_addr; 514 struct page *apic_access_page; 515 516 gpa_t wall_clock; 517 518 struct page *ept_identity_pagetable; 519 bool ept_identity_pagetable_done; 520 gpa_t ept_identity_map_addr; 521 522 unsigned long irq_sources_bitmap; 523 s64 kvmclock_offset; 524 raw_spinlock_t tsc_write_lock; 525 u64 last_tsc_nsec; 526 u64 last_tsc_write; 527 u32 last_tsc_khz; 528 u64 cur_tsc_nsec; 529 u64 cur_tsc_write; 530 u64 cur_tsc_offset; 531 u8 cur_tsc_generation; 532 533 struct kvm_xen_hvm_config xen_hvm_config; 534 535 /* fields used by HYPER-V emulation */ 536 u64 hv_guest_os_id; 537 u64 hv_hypercall; 538 539 atomic_t reader_counter; 540 541 #ifdef CONFIG_KVM_MMU_AUDIT 542 int audit_point; 543 #endif 544 }; 545 546 struct kvm_vm_stat { 547 u32 mmu_shadow_zapped; 548 u32 mmu_pte_write; 549 u32 mmu_pte_updated; 550 u32 mmu_pde_zapped; 551 u32 mmu_flooded; 552 u32 mmu_recycled; 553 u32 mmu_cache_miss; 554 u32 mmu_unsync; 555 u32 remote_tlb_flush; 556 u32 lpages; 557 }; 558 559 struct kvm_vcpu_stat { 560 u32 pf_fixed; 561 u32 pf_guest; 562 u32 tlb_flush; 563 u32 invlpg; 564 565 u32 exits; 566 u32 io_exits; 567 u32 mmio_exits; 568 u32 signal_exits; 569 u32 irq_window_exits; 570 u32 nmi_window_exits; 571 u32 halt_exits; 572 u32 halt_wakeup; 573 u32 request_irq_exits; 574 u32 irq_exits; 575 u32 host_state_reload; 576 u32 efer_reload; 577 u32 fpu_reload; 578 u32 insn_emulation; 579 u32 insn_emulation_fail; 580 u32 hypercalls; 581 u32 irq_injections; 582 u32 nmi_injections; 583 }; 584 585 struct x86_instruction_info; 586 587 struct kvm_x86_ops { 588 int (*cpu_has_kvm_support)(void); /* __init */ 589 int (*disabled_by_bios)(void); /* __init */ 590 int (*hardware_enable)(void *dummy); 591 void (*hardware_disable)(void *dummy); 592 void (*check_processor_compatibility)(void *rtn); 593 int (*hardware_setup)(void); /* __init */ 594 void (*hardware_unsetup)(void); /* __exit */ 595 bool (*cpu_has_accelerated_tpr)(void); 596 void (*cpuid_update)(struct kvm_vcpu *vcpu); 597 598 /* Create, but do not attach this VCPU */ 599 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id); 600 void (*vcpu_free)(struct kvm_vcpu *vcpu); 601 int (*vcpu_reset)(struct kvm_vcpu *vcpu); 602 603 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu); 604 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu); 605 void (*vcpu_put)(struct kvm_vcpu *vcpu); 606 607 void (*set_guest_debug)(struct kvm_vcpu *vcpu, 608 struct kvm_guest_debug *dbg); 609 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata); 610 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 611 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg); 612 void (*get_segment)(struct kvm_vcpu *vcpu, 613 struct kvm_segment *var, int seg); 614 int (*get_cpl)(struct kvm_vcpu *vcpu); 615 void (*set_segment)(struct kvm_vcpu *vcpu, 616 struct kvm_segment *var, int seg); 617 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l); 618 void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu); 619 void (*decache_cr3)(struct kvm_vcpu *vcpu); 620 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu); 621 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0); 622 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 623 int (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4); 624 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer); 625 void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 626 void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 627 void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 628 void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 629 void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value); 630 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg); 631 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu); 632 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags); 633 void (*fpu_activate)(struct kvm_vcpu *vcpu); 634 void (*fpu_deactivate)(struct kvm_vcpu *vcpu); 635 636 void (*tlb_flush)(struct kvm_vcpu *vcpu); 637 638 void (*run)(struct kvm_vcpu *vcpu); 639 int (*handle_exit)(struct kvm_vcpu *vcpu); 640 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu); 641 void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 642 u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 643 void (*patch_hypercall)(struct kvm_vcpu *vcpu, 644 unsigned char *hypercall_addr); 645 void (*set_irq)(struct kvm_vcpu *vcpu); 646 void (*set_nmi)(struct kvm_vcpu *vcpu); 647 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr, 648 bool has_error_code, u32 error_code, 649 bool reinject); 650 void (*cancel_injection)(struct kvm_vcpu *vcpu); 651 int (*interrupt_allowed)(struct kvm_vcpu *vcpu); 652 int (*nmi_allowed)(struct kvm_vcpu *vcpu); 653 bool (*get_nmi_mask)(struct kvm_vcpu *vcpu); 654 void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked); 655 void (*enable_nmi_window)(struct kvm_vcpu *vcpu); 656 void (*enable_irq_window)(struct kvm_vcpu *vcpu); 657 void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr); 658 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr); 659 int (*get_tdp_level)(void); 660 u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio); 661 int (*get_lpage_level)(void); 662 bool (*rdtscp_supported)(void); 663 void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment, bool host); 664 665 void (*set_tdp_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 666 667 void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry); 668 669 bool (*has_wbinvd_exit)(void); 670 671 void (*set_tsc_khz)(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale); 672 void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset); 673 674 u64 (*compute_tsc_offset)(struct kvm_vcpu *vcpu, u64 target_tsc); 675 u64 (*read_l1_tsc)(struct kvm_vcpu *vcpu); 676 677 void (*get_exit_info)(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2); 678 679 int (*check_intercept)(struct kvm_vcpu *vcpu, 680 struct x86_instruction_info *info, 681 enum x86_intercept_stage stage); 682 }; 683 684 struct kvm_arch_async_pf { 685 u32 token; 686 gfn_t gfn; 687 unsigned long cr3; 688 bool direct_map; 689 }; 690 691 extern struct kvm_x86_ops *kvm_x86_ops; 692 693 static inline void adjust_tsc_offset_guest(struct kvm_vcpu *vcpu, 694 s64 adjustment) 695 { 696 kvm_x86_ops->adjust_tsc_offset(vcpu, adjustment, false); 697 } 698 699 static inline void adjust_tsc_offset_host(struct kvm_vcpu *vcpu, s64 adjustment) 700 { 701 kvm_x86_ops->adjust_tsc_offset(vcpu, adjustment, true); 702 } 703 704 int kvm_mmu_module_init(void); 705 void kvm_mmu_module_exit(void); 706 707 void kvm_mmu_destroy(struct kvm_vcpu *vcpu); 708 int kvm_mmu_create(struct kvm_vcpu *vcpu); 709 int kvm_mmu_setup(struct kvm_vcpu *vcpu); 710 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask, 711 u64 dirty_mask, u64 nx_mask, u64 x_mask); 712 713 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu); 714 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot); 715 int kvm_mmu_rmap_write_protect(struct kvm *kvm, u64 gfn, 716 struct kvm_memory_slot *slot); 717 void kvm_mmu_zap_all(struct kvm *kvm); 718 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm); 719 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages); 720 721 int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3); 722 723 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, 724 const void *val, int bytes); 725 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn); 726 727 extern bool tdp_enabled; 728 729 u64 vcpu_tsc_khz(struct kvm_vcpu *vcpu); 730 731 /* control of guest tsc rate supported? */ 732 extern bool kvm_has_tsc_control; 733 /* minimum supported tsc_khz for guests */ 734 extern u32 kvm_min_guest_tsc_khz; 735 /* maximum supported tsc_khz for guests */ 736 extern u32 kvm_max_guest_tsc_khz; 737 738 enum emulation_result { 739 EMULATE_DONE, /* no further processing */ 740 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */ 741 EMULATE_FAIL, /* can't emulate this instruction */ 742 }; 743 744 #define EMULTYPE_NO_DECODE (1 << 0) 745 #define EMULTYPE_TRAP_UD (1 << 1) 746 #define EMULTYPE_SKIP (1 << 2) 747 #define EMULTYPE_RETRY (1 << 3) 748 int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2, 749 int emulation_type, void *insn, int insn_len); 750 751 static inline int emulate_instruction(struct kvm_vcpu *vcpu, 752 int emulation_type) 753 { 754 return x86_emulate_instruction(vcpu, 0, emulation_type, NULL, 0); 755 } 756 757 void kvm_enable_efer_bits(u64); 758 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data); 759 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 760 761 struct x86_emulate_ctxt; 762 763 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port); 764 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu); 765 int kvm_emulate_halt(struct kvm_vcpu *vcpu); 766 int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu); 767 768 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); 769 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg); 770 771 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index, 772 int reason, bool has_error_code, u32 error_code); 773 774 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0); 775 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3); 776 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); 777 int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8); 778 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val); 779 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val); 780 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu); 781 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw); 782 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l); 783 int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr); 784 785 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata); 786 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data); 787 788 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu); 789 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); 790 bool kvm_rdpmc(struct kvm_vcpu *vcpu); 791 792 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr); 793 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 794 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr); 795 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 796 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault); 797 int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, 798 gfn_t gfn, void *data, int offset, int len, 799 u32 access); 800 void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault); 801 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl); 802 803 int kvm_pic_set_irq(void *opaque, int irq, int level); 804 805 void kvm_inject_nmi(struct kvm_vcpu *vcpu); 806 807 int fx_init(struct kvm_vcpu *vcpu); 808 809 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu); 810 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, 811 const u8 *new, int bytes); 812 int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn); 813 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva); 814 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu); 815 int kvm_mmu_load(struct kvm_vcpu *vcpu); 816 void kvm_mmu_unload(struct kvm_vcpu *vcpu); 817 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu); 818 gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access); 819 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, 820 struct x86_exception *exception); 821 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, 822 struct x86_exception *exception); 823 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, 824 struct x86_exception *exception); 825 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, 826 struct x86_exception *exception); 827 828 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu); 829 830 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code, 831 void *insn, int insn_len); 832 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva); 833 834 void kvm_enable_tdp(void); 835 void kvm_disable_tdp(void); 836 837 int complete_pio(struct kvm_vcpu *vcpu); 838 bool kvm_check_iopl(struct kvm_vcpu *vcpu); 839 840 static inline gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) 841 { 842 return gpa; 843 } 844 845 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page) 846 { 847 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT); 848 849 return (struct kvm_mmu_page *)page_private(page); 850 } 851 852 static inline u16 kvm_read_ldt(void) 853 { 854 u16 ldt; 855 asm("sldt %0" : "=g"(ldt)); 856 return ldt; 857 } 858 859 static inline void kvm_load_ldt(u16 sel) 860 { 861 asm("lldt %0" : : "rm"(sel)); 862 } 863 864 #ifdef CONFIG_X86_64 865 static inline unsigned long read_msr(unsigned long msr) 866 { 867 u64 value; 868 869 rdmsrl(msr, value); 870 return value; 871 } 872 #endif 873 874 static inline u32 get_rdx_init_val(void) 875 { 876 return 0x600; /* P6 family */ 877 } 878 879 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code) 880 { 881 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code); 882 } 883 884 #define TSS_IOPB_BASE_OFFSET 0x66 885 #define TSS_BASE_SIZE 0x68 886 #define TSS_IOPB_SIZE (65536 / 8) 887 #define TSS_REDIRECTION_SIZE (256 / 8) 888 #define RMODE_TSS_SIZE \ 889 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1) 890 891 enum { 892 TASK_SWITCH_CALL = 0, 893 TASK_SWITCH_IRET = 1, 894 TASK_SWITCH_JMP = 2, 895 TASK_SWITCH_GATE = 3, 896 }; 897 898 #define HF_GIF_MASK (1 << 0) 899 #define HF_HIF_MASK (1 << 1) 900 #define HF_VINTR_MASK (1 << 2) 901 #define HF_NMI_MASK (1 << 3) 902 #define HF_IRET_MASK (1 << 4) 903 #define HF_GUEST_MASK (1 << 5) /* VCPU is in guest-mode */ 904 905 /* 906 * Hardware virtualization extension instructions may fault if a 907 * reboot turns off virtualization while processes are running. 908 * Trap the fault and ignore the instruction if that happens. 909 */ 910 asmlinkage void kvm_spurious_fault(void); 911 extern bool kvm_rebooting; 912 913 #define ____kvm_handle_fault_on_reboot(insn, cleanup_insn) \ 914 "666: " insn "\n\t" \ 915 "668: \n\t" \ 916 ".pushsection .fixup, \"ax\" \n" \ 917 "667: \n\t" \ 918 cleanup_insn "\n\t" \ 919 "cmpb $0, kvm_rebooting \n\t" \ 920 "jne 668b \n\t" \ 921 __ASM_SIZE(push) " $666b \n\t" \ 922 "call kvm_spurious_fault \n\t" \ 923 ".popsection \n\t" \ 924 ".pushsection __ex_table, \"a\" \n\t" \ 925 _ASM_PTR " 666b, 667b \n\t" \ 926 ".popsection" 927 928 #define __kvm_handle_fault_on_reboot(insn) \ 929 ____kvm_handle_fault_on_reboot(insn, "") 930 931 #define KVM_ARCH_WANT_MMU_NOTIFIER 932 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 933 int kvm_age_hva(struct kvm *kvm, unsigned long hva); 934 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); 935 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 936 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu); 937 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu); 938 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu); 939 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 940 941 void kvm_define_shared_msr(unsigned index, u32 msr); 942 void kvm_set_shared_msr(unsigned index, u64 val, u64 mask); 943 944 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip); 945 946 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, 947 struct kvm_async_pf *work); 948 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, 949 struct kvm_async_pf *work); 950 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, 951 struct kvm_async_pf *work); 952 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu); 953 extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn); 954 955 void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err); 956 957 int kvm_is_in_guest(void); 958 959 void kvm_pmu_init(struct kvm_vcpu *vcpu); 960 void kvm_pmu_destroy(struct kvm_vcpu *vcpu); 961 void kvm_pmu_reset(struct kvm_vcpu *vcpu); 962 void kvm_pmu_cpuid_update(struct kvm_vcpu *vcpu); 963 bool kvm_pmu_msr(struct kvm_vcpu *vcpu, u32 msr); 964 int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *data); 965 int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data); 966 int kvm_pmu_read_pmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data); 967 void kvm_handle_pmu_event(struct kvm_vcpu *vcpu); 968 void kvm_deliver_pmi(struct kvm_vcpu *vcpu); 969 970 #endif /* _ASM_X86_KVM_HOST_H */ 971