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 #include <asm/asm.h> 31 32 #define KVM_MAX_VCPUS 254 33 #define KVM_SOFT_MAX_VCPUS 160 34 #define KVM_MEMORY_SLOTS 32 35 /* memory slots that does not exposed to userspace */ 36 #define KVM_PRIVATE_MEM_SLOTS 4 37 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS) 38 39 #define KVM_MMIO_SIZE 16 40 41 #define KVM_PIO_PAGE_OFFSET 1 42 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2 43 44 #define CR0_RESERVED_BITS \ 45 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ 46 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ 47 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) 48 49 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1) 50 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD)) 51 #define CR3_PCID_ENABLED_RESERVED_BITS 0xFFFFFF0000000000ULL 52 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \ 53 0xFFFFFF0000000000ULL) 54 #define CR4_RESERVED_BITS \ 55 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ 56 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ 57 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR | X86_CR4_PCIDE \ 58 | X86_CR4_OSXSAVE | X86_CR4_SMEP | X86_CR4_RDWRGSFS \ 59 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) 60 61 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) 62 63 64 65 #define INVALID_PAGE (~(hpa_t)0) 66 #define VALID_PAGE(x) ((x) != INVALID_PAGE) 67 68 #define UNMAPPED_GVA (~(gpa_t)0) 69 70 /* KVM Hugepage definitions for x86 */ 71 #define KVM_NR_PAGE_SIZES 3 72 #define KVM_HPAGE_GFN_SHIFT(x) (((x) - 1) * 9) 73 #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + KVM_HPAGE_GFN_SHIFT(x)) 74 #define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x)) 75 #define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1)) 76 #define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE) 77 78 #define DE_VECTOR 0 79 #define DB_VECTOR 1 80 #define BP_VECTOR 3 81 #define OF_VECTOR 4 82 #define BR_VECTOR 5 83 #define UD_VECTOR 6 84 #define NM_VECTOR 7 85 #define DF_VECTOR 8 86 #define TS_VECTOR 10 87 #define NP_VECTOR 11 88 #define SS_VECTOR 12 89 #define GP_VECTOR 13 90 #define PF_VECTOR 14 91 #define MF_VECTOR 16 92 #define MC_VECTOR 18 93 94 #define SELECTOR_TI_MASK (1 << 2) 95 #define SELECTOR_RPL_MASK 0x03 96 97 #define IOPL_SHIFT 12 98 99 #define KVM_PERMILLE_MMU_PAGES 20 100 #define KVM_MIN_ALLOC_MMU_PAGES 64 101 #define KVM_MMU_HASH_SHIFT 10 102 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT) 103 #define KVM_MIN_FREE_MMU_PAGES 5 104 #define KVM_REFILL_PAGES 25 105 #define KVM_MAX_CPUID_ENTRIES 80 106 #define KVM_NR_FIXED_MTRR_REGION 88 107 #define KVM_NR_VAR_MTRR 8 108 109 #define ASYNC_PF_PER_VCPU 64 110 111 extern raw_spinlock_t kvm_lock; 112 extern struct list_head vm_list; 113 114 struct kvm_vcpu; 115 struct kvm; 116 struct kvm_async_pf; 117 118 enum kvm_reg { 119 VCPU_REGS_RAX = 0, 120 VCPU_REGS_RCX = 1, 121 VCPU_REGS_RDX = 2, 122 VCPU_REGS_RBX = 3, 123 VCPU_REGS_RSP = 4, 124 VCPU_REGS_RBP = 5, 125 VCPU_REGS_RSI = 6, 126 VCPU_REGS_RDI = 7, 127 #ifdef CONFIG_X86_64 128 VCPU_REGS_R8 = 8, 129 VCPU_REGS_R9 = 9, 130 VCPU_REGS_R10 = 10, 131 VCPU_REGS_R11 = 11, 132 VCPU_REGS_R12 = 12, 133 VCPU_REGS_R13 = 13, 134 VCPU_REGS_R14 = 14, 135 VCPU_REGS_R15 = 15, 136 #endif 137 VCPU_REGS_RIP, 138 NR_VCPU_REGS 139 }; 140 141 enum kvm_reg_ex { 142 VCPU_EXREG_PDPTR = NR_VCPU_REGS, 143 VCPU_EXREG_CR3, 144 VCPU_EXREG_RFLAGS, 145 VCPU_EXREG_CPL, 146 VCPU_EXREG_SEGMENTS, 147 }; 148 149 enum { 150 VCPU_SREG_ES, 151 VCPU_SREG_CS, 152 VCPU_SREG_SS, 153 VCPU_SREG_DS, 154 VCPU_SREG_FS, 155 VCPU_SREG_GS, 156 VCPU_SREG_TR, 157 VCPU_SREG_LDTR, 158 }; 159 160 #include <asm/kvm_emulate.h> 161 162 #define KVM_NR_MEM_OBJS 40 163 164 #define KVM_NR_DB_REGS 4 165 166 #define DR6_BD (1 << 13) 167 #define DR6_BS (1 << 14) 168 #define DR6_FIXED_1 0xffff0ff0 169 #define DR6_VOLATILE 0x0000e00f 170 171 #define DR7_BP_EN_MASK 0x000000ff 172 #define DR7_GE (1 << 9) 173 #define DR7_GD (1 << 13) 174 #define DR7_FIXED_1 0x00000400 175 #define DR7_VOLATILE 0xffff23ff 176 177 /* apic attention bits */ 178 #define KVM_APIC_CHECK_VAPIC 0 179 /* 180 * The following bit is set with PV-EOI, unset on EOI. 181 * We detect PV-EOI changes by guest by comparing 182 * this bit with PV-EOI in guest memory. 183 * See the implementation in apic_update_pv_eoi. 184 */ 185 #define KVM_APIC_PV_EOI_PENDING 1 186 187 /* 188 * We don't want allocation failures within the mmu code, so we preallocate 189 * enough memory for a single page fault in a cache. 190 */ 191 struct kvm_mmu_memory_cache { 192 int nobjs; 193 void *objects[KVM_NR_MEM_OBJS]; 194 }; 195 196 /* 197 * kvm_mmu_page_role, below, is defined as: 198 * 199 * bits 0:3 - total guest paging levels (2-4, or zero for real mode) 200 * bits 4:7 - page table level for this shadow (1-4) 201 * bits 8:9 - page table quadrant for 2-level guests 202 * bit 16 - direct mapping of virtual to physical mapping at gfn 203 * used for real mode and two-dimensional paging 204 * bits 17:19 - common access permissions for all ptes in this shadow page 205 */ 206 union kvm_mmu_page_role { 207 unsigned word; 208 struct { 209 unsigned level:4; 210 unsigned cr4_pae:1; 211 unsigned quadrant:2; 212 unsigned pad_for_nice_hex_output:6; 213 unsigned direct:1; 214 unsigned access:3; 215 unsigned invalid:1; 216 unsigned nxe:1; 217 unsigned cr0_wp:1; 218 unsigned smep_andnot_wp:1; 219 }; 220 }; 221 222 struct kvm_mmu_page { 223 struct list_head link; 224 struct hlist_node hash_link; 225 226 /* 227 * The following two entries are used to key the shadow page in the 228 * hash table. 229 */ 230 gfn_t gfn; 231 union kvm_mmu_page_role role; 232 233 u64 *spt; 234 /* hold the gfn of each spte inside spt */ 235 gfn_t *gfns; 236 /* 237 * One bit set per slot which has memory 238 * in this shadow page. 239 */ 240 DECLARE_BITMAP(slot_bitmap, KVM_MEM_SLOTS_NUM); 241 bool unsync; 242 int root_count; /* Currently serving as active root */ 243 unsigned int unsync_children; 244 unsigned long parent_ptes; /* Reverse mapping for parent_pte */ 245 DECLARE_BITMAP(unsync_child_bitmap, 512); 246 247 #ifdef CONFIG_X86_32 248 int clear_spte_count; 249 #endif 250 251 int write_flooding_count; 252 }; 253 254 struct kvm_pio_request { 255 unsigned long count; 256 int in; 257 int port; 258 int size; 259 }; 260 261 /* 262 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level 263 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu 264 * mode. 265 */ 266 struct kvm_mmu { 267 void (*new_cr3)(struct kvm_vcpu *vcpu); 268 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root); 269 unsigned long (*get_cr3)(struct kvm_vcpu *vcpu); 270 u64 (*get_pdptr)(struct kvm_vcpu *vcpu, int index); 271 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err, 272 bool prefault); 273 void (*inject_page_fault)(struct kvm_vcpu *vcpu, 274 struct x86_exception *fault); 275 void (*free)(struct kvm_vcpu *vcpu); 276 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access, 277 struct x86_exception *exception); 278 gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access); 279 int (*sync_page)(struct kvm_vcpu *vcpu, 280 struct kvm_mmu_page *sp); 281 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva); 282 void (*update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, 283 u64 *spte, const void *pte); 284 hpa_t root_hpa; 285 int root_level; 286 int shadow_root_level; 287 union kvm_mmu_page_role base_role; 288 bool direct_map; 289 290 u64 *pae_root; 291 u64 *lm_root; 292 u64 rsvd_bits_mask[2][4]; 293 294 bool nx; 295 296 u64 pdptrs[4]; /* pae */ 297 }; 298 299 enum pmc_type { 300 KVM_PMC_GP = 0, 301 KVM_PMC_FIXED, 302 }; 303 304 struct kvm_pmc { 305 enum pmc_type type; 306 u8 idx; 307 u64 counter; 308 u64 eventsel; 309 struct perf_event *perf_event; 310 struct kvm_vcpu *vcpu; 311 }; 312 313 struct kvm_pmu { 314 unsigned nr_arch_gp_counters; 315 unsigned nr_arch_fixed_counters; 316 unsigned available_event_types; 317 u64 fixed_ctr_ctrl; 318 u64 global_ctrl; 319 u64 global_status; 320 u64 global_ovf_ctrl; 321 u64 counter_bitmask[2]; 322 u64 global_ctrl_mask; 323 u8 version; 324 struct kvm_pmc gp_counters[INTEL_PMC_MAX_GENERIC]; 325 struct kvm_pmc fixed_counters[INTEL_PMC_MAX_FIXED]; 326 struct irq_work irq_work; 327 u64 reprogram_pmi; 328 }; 329 330 struct kvm_vcpu_arch { 331 /* 332 * rip and regs accesses must go through 333 * kvm_{register,rip}_{read,write} functions. 334 */ 335 unsigned long regs[NR_VCPU_REGS]; 336 u32 regs_avail; 337 u32 regs_dirty; 338 339 unsigned long cr0; 340 unsigned long cr0_guest_owned_bits; 341 unsigned long cr2; 342 unsigned long cr3; 343 unsigned long cr4; 344 unsigned long cr4_guest_owned_bits; 345 unsigned long cr8; 346 u32 hflags; 347 u64 efer; 348 u64 apic_base; 349 struct kvm_lapic *apic; /* kernel irqchip context */ 350 unsigned long apic_attention; 351 int32_t apic_arb_prio; 352 int mp_state; 353 int sipi_vector; 354 u64 ia32_misc_enable_msr; 355 bool tpr_access_reporting; 356 357 /* 358 * Paging state of the vcpu 359 * 360 * If the vcpu runs in guest mode with two level paging this still saves 361 * the paging mode of the l1 guest. This context is always used to 362 * handle faults. 363 */ 364 struct kvm_mmu mmu; 365 366 /* 367 * Paging state of an L2 guest (used for nested npt) 368 * 369 * This context will save all necessary information to walk page tables 370 * of the an L2 guest. This context is only initialized for page table 371 * walking and not for faulting since we never handle l2 page faults on 372 * the host. 373 */ 374 struct kvm_mmu nested_mmu; 375 376 /* 377 * Pointer to the mmu context currently used for 378 * gva_to_gpa translations. 379 */ 380 struct kvm_mmu *walk_mmu; 381 382 struct kvm_mmu_memory_cache mmu_pte_list_desc_cache; 383 struct kvm_mmu_memory_cache mmu_page_cache; 384 struct kvm_mmu_memory_cache mmu_page_header_cache; 385 386 struct fpu guest_fpu; 387 u64 xcr0; 388 389 struct kvm_pio_request pio; 390 void *pio_data; 391 392 u8 event_exit_inst_len; 393 394 struct kvm_queued_exception { 395 bool pending; 396 bool has_error_code; 397 bool reinject; 398 u8 nr; 399 u32 error_code; 400 } exception; 401 402 struct kvm_queued_interrupt { 403 bool pending; 404 bool soft; 405 u8 nr; 406 } interrupt; 407 408 int halt_request; /* real mode on Intel only */ 409 410 int cpuid_nent; 411 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES]; 412 /* emulate context */ 413 414 struct x86_emulate_ctxt emulate_ctxt; 415 bool emulate_regs_need_sync_to_vcpu; 416 bool emulate_regs_need_sync_from_vcpu; 417 418 gpa_t time; 419 struct pvclock_vcpu_time_info hv_clock; 420 unsigned int hw_tsc_khz; 421 unsigned int time_offset; 422 struct page *time_page; 423 424 struct { 425 u64 msr_val; 426 u64 last_steal; 427 u64 accum_steal; 428 struct gfn_to_hva_cache stime; 429 struct kvm_steal_time steal; 430 } st; 431 432 u64 last_guest_tsc; 433 u64 last_kernel_ns; 434 u64 last_host_tsc; 435 u64 tsc_offset_adjustment; 436 u64 this_tsc_nsec; 437 u64 this_tsc_write; 438 u8 this_tsc_generation; 439 bool tsc_catchup; 440 bool tsc_always_catchup; 441 s8 virtual_tsc_shift; 442 u32 virtual_tsc_mult; 443 u32 virtual_tsc_khz; 444 445 atomic_t nmi_queued; /* unprocessed asynchronous NMIs */ 446 unsigned nmi_pending; /* NMI queued after currently running handler */ 447 bool nmi_injected; /* Trying to inject an NMI this entry */ 448 449 struct mtrr_state_type mtrr_state; 450 u32 pat; 451 452 int switch_db_regs; 453 unsigned long db[KVM_NR_DB_REGS]; 454 unsigned long dr6; 455 unsigned long dr7; 456 unsigned long eff_db[KVM_NR_DB_REGS]; 457 458 u64 mcg_cap; 459 u64 mcg_status; 460 u64 mcg_ctl; 461 u64 *mce_banks; 462 463 /* Cache MMIO info */ 464 u64 mmio_gva; 465 unsigned access; 466 gfn_t mmio_gfn; 467 468 struct kvm_pmu pmu; 469 470 /* used for guest single stepping over the given code position */ 471 unsigned long singlestep_rip; 472 473 /* fields used by HYPER-V emulation */ 474 u64 hv_vapic; 475 476 cpumask_var_t wbinvd_dirty_mask; 477 478 unsigned long last_retry_eip; 479 unsigned long last_retry_addr; 480 481 struct { 482 bool halted; 483 gfn_t gfns[roundup_pow_of_two(ASYNC_PF_PER_VCPU)]; 484 struct gfn_to_hva_cache data; 485 u64 msr_val; 486 u32 id; 487 bool send_user_only; 488 } apf; 489 490 /* OSVW MSRs (AMD only) */ 491 struct { 492 u64 length; 493 u64 status; 494 } osvw; 495 496 struct { 497 u64 msr_val; 498 struct gfn_to_hva_cache data; 499 } pv_eoi; 500 }; 501 502 struct kvm_lpage_info { 503 unsigned long rmap_pde; 504 int write_count; 505 }; 506 507 struct kvm_arch_memory_slot { 508 struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1]; 509 }; 510 511 struct kvm_arch { 512 unsigned int n_used_mmu_pages; 513 unsigned int n_requested_mmu_pages; 514 unsigned int n_max_mmu_pages; 515 unsigned int indirect_shadow_pages; 516 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES]; 517 /* 518 * Hash table of struct kvm_mmu_page. 519 */ 520 struct list_head active_mmu_pages; 521 struct list_head assigned_dev_head; 522 struct iommu_domain *iommu_domain; 523 int iommu_flags; 524 struct kvm_pic *vpic; 525 struct kvm_ioapic *vioapic; 526 struct kvm_pit *vpit; 527 int vapics_in_nmi_mode; 528 529 unsigned int tss_addr; 530 struct page *apic_access_page; 531 532 gpa_t wall_clock; 533 534 struct page *ept_identity_pagetable; 535 bool ept_identity_pagetable_done; 536 gpa_t ept_identity_map_addr; 537 538 unsigned long irq_sources_bitmap; 539 s64 kvmclock_offset; 540 raw_spinlock_t tsc_write_lock; 541 u64 last_tsc_nsec; 542 u64 last_tsc_write; 543 u32 last_tsc_khz; 544 u64 cur_tsc_nsec; 545 u64 cur_tsc_write; 546 u64 cur_tsc_offset; 547 u8 cur_tsc_generation; 548 549 struct kvm_xen_hvm_config xen_hvm_config; 550 551 /* fields used by HYPER-V emulation */ 552 u64 hv_guest_os_id; 553 u64 hv_hypercall; 554 555 #ifdef CONFIG_KVM_MMU_AUDIT 556 int audit_point; 557 #endif 558 }; 559 560 struct kvm_vm_stat { 561 u32 mmu_shadow_zapped; 562 u32 mmu_pte_write; 563 u32 mmu_pte_updated; 564 u32 mmu_pde_zapped; 565 u32 mmu_flooded; 566 u32 mmu_recycled; 567 u32 mmu_cache_miss; 568 u32 mmu_unsync; 569 u32 remote_tlb_flush; 570 u32 lpages; 571 }; 572 573 struct kvm_vcpu_stat { 574 u32 pf_fixed; 575 u32 pf_guest; 576 u32 tlb_flush; 577 u32 invlpg; 578 579 u32 exits; 580 u32 io_exits; 581 u32 mmio_exits; 582 u32 signal_exits; 583 u32 irq_window_exits; 584 u32 nmi_window_exits; 585 u32 halt_exits; 586 u32 halt_wakeup; 587 u32 request_irq_exits; 588 u32 irq_exits; 589 u32 host_state_reload; 590 u32 efer_reload; 591 u32 fpu_reload; 592 u32 insn_emulation; 593 u32 insn_emulation_fail; 594 u32 hypercalls; 595 u32 irq_injections; 596 u32 nmi_injections; 597 }; 598 599 struct x86_instruction_info; 600 601 struct kvm_x86_ops { 602 int (*cpu_has_kvm_support)(void); /* __init */ 603 int (*disabled_by_bios)(void); /* __init */ 604 int (*hardware_enable)(void *dummy); 605 void (*hardware_disable)(void *dummy); 606 void (*check_processor_compatibility)(void *rtn); 607 int (*hardware_setup)(void); /* __init */ 608 void (*hardware_unsetup)(void); /* __exit */ 609 bool (*cpu_has_accelerated_tpr)(void); 610 void (*cpuid_update)(struct kvm_vcpu *vcpu); 611 612 /* Create, but do not attach this VCPU */ 613 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id); 614 void (*vcpu_free)(struct kvm_vcpu *vcpu); 615 int (*vcpu_reset)(struct kvm_vcpu *vcpu); 616 617 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu); 618 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu); 619 void (*vcpu_put)(struct kvm_vcpu *vcpu); 620 621 void (*set_guest_debug)(struct kvm_vcpu *vcpu, 622 struct kvm_guest_debug *dbg); 623 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata); 624 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 625 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg); 626 void (*get_segment)(struct kvm_vcpu *vcpu, 627 struct kvm_segment *var, int seg); 628 int (*get_cpl)(struct kvm_vcpu *vcpu); 629 void (*set_segment)(struct kvm_vcpu *vcpu, 630 struct kvm_segment *var, int seg); 631 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l); 632 void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu); 633 void (*decache_cr3)(struct kvm_vcpu *vcpu); 634 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu); 635 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0); 636 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 637 int (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4); 638 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer); 639 void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 640 void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 641 void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 642 void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 643 void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value); 644 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg); 645 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu); 646 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags); 647 void (*fpu_activate)(struct kvm_vcpu *vcpu); 648 void (*fpu_deactivate)(struct kvm_vcpu *vcpu); 649 650 void (*tlb_flush)(struct kvm_vcpu *vcpu); 651 652 void (*run)(struct kvm_vcpu *vcpu); 653 int (*handle_exit)(struct kvm_vcpu *vcpu); 654 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu); 655 void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 656 u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 657 void (*patch_hypercall)(struct kvm_vcpu *vcpu, 658 unsigned char *hypercall_addr); 659 void (*set_irq)(struct kvm_vcpu *vcpu); 660 void (*set_nmi)(struct kvm_vcpu *vcpu); 661 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr, 662 bool has_error_code, u32 error_code, 663 bool reinject); 664 void (*cancel_injection)(struct kvm_vcpu *vcpu); 665 int (*interrupt_allowed)(struct kvm_vcpu *vcpu); 666 int (*nmi_allowed)(struct kvm_vcpu *vcpu); 667 bool (*get_nmi_mask)(struct kvm_vcpu *vcpu); 668 void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked); 669 void (*enable_nmi_window)(struct kvm_vcpu *vcpu); 670 void (*enable_irq_window)(struct kvm_vcpu *vcpu); 671 void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr); 672 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr); 673 int (*get_tdp_level)(void); 674 u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio); 675 int (*get_lpage_level)(void); 676 bool (*rdtscp_supported)(void); 677 bool (*invpcid_supported)(void); 678 void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment, bool host); 679 680 void (*set_tdp_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 681 682 void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry); 683 684 bool (*has_wbinvd_exit)(void); 685 686 void (*set_tsc_khz)(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale); 687 void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset); 688 689 u64 (*compute_tsc_offset)(struct kvm_vcpu *vcpu, u64 target_tsc); 690 u64 (*read_l1_tsc)(struct kvm_vcpu *vcpu); 691 692 void (*get_exit_info)(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2); 693 694 int (*check_intercept)(struct kvm_vcpu *vcpu, 695 struct x86_instruction_info *info, 696 enum x86_intercept_stage stage); 697 }; 698 699 struct kvm_arch_async_pf { 700 u32 token; 701 gfn_t gfn; 702 unsigned long cr3; 703 bool direct_map; 704 }; 705 706 extern struct kvm_x86_ops *kvm_x86_ops; 707 708 static inline void adjust_tsc_offset_guest(struct kvm_vcpu *vcpu, 709 s64 adjustment) 710 { 711 kvm_x86_ops->adjust_tsc_offset(vcpu, adjustment, false); 712 } 713 714 static inline void adjust_tsc_offset_host(struct kvm_vcpu *vcpu, s64 adjustment) 715 { 716 kvm_x86_ops->adjust_tsc_offset(vcpu, adjustment, true); 717 } 718 719 int kvm_mmu_module_init(void); 720 void kvm_mmu_module_exit(void); 721 722 void kvm_mmu_destroy(struct kvm_vcpu *vcpu); 723 int kvm_mmu_create(struct kvm_vcpu *vcpu); 724 int kvm_mmu_setup(struct kvm_vcpu *vcpu); 725 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask, 726 u64 dirty_mask, u64 nx_mask, u64 x_mask); 727 728 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu); 729 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot); 730 void kvm_mmu_write_protect_pt_masked(struct kvm *kvm, 731 struct kvm_memory_slot *slot, 732 gfn_t gfn_offset, unsigned long mask); 733 void kvm_mmu_zap_all(struct kvm *kvm); 734 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm); 735 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages); 736 737 int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3); 738 739 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, 740 const void *val, int bytes); 741 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn); 742 743 extern bool tdp_enabled; 744 745 u64 vcpu_tsc_khz(struct kvm_vcpu *vcpu); 746 747 /* control of guest tsc rate supported? */ 748 extern bool kvm_has_tsc_control; 749 /* minimum supported tsc_khz for guests */ 750 extern u32 kvm_min_guest_tsc_khz; 751 /* maximum supported tsc_khz for guests */ 752 extern u32 kvm_max_guest_tsc_khz; 753 754 enum emulation_result { 755 EMULATE_DONE, /* no further processing */ 756 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */ 757 EMULATE_FAIL, /* can't emulate this instruction */ 758 }; 759 760 #define EMULTYPE_NO_DECODE (1 << 0) 761 #define EMULTYPE_TRAP_UD (1 << 1) 762 #define EMULTYPE_SKIP (1 << 2) 763 #define EMULTYPE_RETRY (1 << 3) 764 int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2, 765 int emulation_type, void *insn, int insn_len); 766 767 static inline int emulate_instruction(struct kvm_vcpu *vcpu, 768 int emulation_type) 769 { 770 return x86_emulate_instruction(vcpu, 0, emulation_type, NULL, 0); 771 } 772 773 void kvm_enable_efer_bits(u64); 774 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data); 775 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 776 777 struct x86_emulate_ctxt; 778 779 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port); 780 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu); 781 int kvm_emulate_halt(struct kvm_vcpu *vcpu); 782 int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu); 783 784 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); 785 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg); 786 787 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index, 788 int reason, bool has_error_code, u32 error_code); 789 790 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0); 791 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3); 792 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); 793 int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8); 794 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val); 795 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val); 796 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu); 797 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw); 798 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l); 799 int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr); 800 801 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata); 802 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data); 803 804 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu); 805 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); 806 bool kvm_rdpmc(struct kvm_vcpu *vcpu); 807 808 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr); 809 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 810 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr); 811 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 812 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault); 813 int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, 814 gfn_t gfn, void *data, int offset, int len, 815 u32 access); 816 void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault); 817 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl); 818 819 static inline int __kvm_irq_line_state(unsigned long *irq_state, 820 int irq_source_id, int level) 821 { 822 /* Logical OR for level trig interrupt */ 823 if (level) 824 __set_bit(irq_source_id, irq_state); 825 else 826 __clear_bit(irq_source_id, irq_state); 827 828 return !!(*irq_state); 829 } 830 831 int kvm_pic_set_irq(struct kvm_pic *pic, int irq, int irq_source_id, int level); 832 void kvm_pic_clear_all(struct kvm_pic *pic, int irq_source_id); 833 834 void kvm_inject_nmi(struct kvm_vcpu *vcpu); 835 836 int fx_init(struct kvm_vcpu *vcpu); 837 838 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu); 839 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, 840 const u8 *new, int bytes); 841 int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn); 842 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva); 843 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu); 844 int kvm_mmu_load(struct kvm_vcpu *vcpu); 845 void kvm_mmu_unload(struct kvm_vcpu *vcpu); 846 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu); 847 gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access); 848 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, 849 struct x86_exception *exception); 850 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, 851 struct x86_exception *exception); 852 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, 853 struct x86_exception *exception); 854 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, 855 struct x86_exception *exception); 856 857 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu); 858 859 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code, 860 void *insn, int insn_len); 861 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva); 862 863 void kvm_enable_tdp(void); 864 void kvm_disable_tdp(void); 865 866 int complete_pio(struct kvm_vcpu *vcpu); 867 bool kvm_check_iopl(struct kvm_vcpu *vcpu); 868 869 static inline gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) 870 { 871 return gpa; 872 } 873 874 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page) 875 { 876 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT); 877 878 return (struct kvm_mmu_page *)page_private(page); 879 } 880 881 static inline u16 kvm_read_ldt(void) 882 { 883 u16 ldt; 884 asm("sldt %0" : "=g"(ldt)); 885 return ldt; 886 } 887 888 static inline void kvm_load_ldt(u16 sel) 889 { 890 asm("lldt %0" : : "rm"(sel)); 891 } 892 893 #ifdef CONFIG_X86_64 894 static inline unsigned long read_msr(unsigned long msr) 895 { 896 u64 value; 897 898 rdmsrl(msr, value); 899 return value; 900 } 901 #endif 902 903 static inline u32 get_rdx_init_val(void) 904 { 905 return 0x600; /* P6 family */ 906 } 907 908 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code) 909 { 910 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code); 911 } 912 913 #define TSS_IOPB_BASE_OFFSET 0x66 914 #define TSS_BASE_SIZE 0x68 915 #define TSS_IOPB_SIZE (65536 / 8) 916 #define TSS_REDIRECTION_SIZE (256 / 8) 917 #define RMODE_TSS_SIZE \ 918 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1) 919 920 enum { 921 TASK_SWITCH_CALL = 0, 922 TASK_SWITCH_IRET = 1, 923 TASK_SWITCH_JMP = 2, 924 TASK_SWITCH_GATE = 3, 925 }; 926 927 #define HF_GIF_MASK (1 << 0) 928 #define HF_HIF_MASK (1 << 1) 929 #define HF_VINTR_MASK (1 << 2) 930 #define HF_NMI_MASK (1 << 3) 931 #define HF_IRET_MASK (1 << 4) 932 #define HF_GUEST_MASK (1 << 5) /* VCPU is in guest-mode */ 933 934 /* 935 * Hardware virtualization extension instructions may fault if a 936 * reboot turns off virtualization while processes are running. 937 * Trap the fault and ignore the instruction if that happens. 938 */ 939 asmlinkage void kvm_spurious_fault(void); 940 extern bool kvm_rebooting; 941 942 #define ____kvm_handle_fault_on_reboot(insn, cleanup_insn) \ 943 "666: " insn "\n\t" \ 944 "668: \n\t" \ 945 ".pushsection .fixup, \"ax\" \n" \ 946 "667: \n\t" \ 947 cleanup_insn "\n\t" \ 948 "cmpb $0, kvm_rebooting \n\t" \ 949 "jne 668b \n\t" \ 950 __ASM_SIZE(push) " $666b \n\t" \ 951 "call kvm_spurious_fault \n\t" \ 952 ".popsection \n\t" \ 953 _ASM_EXTABLE(666b, 667b) 954 955 #define __kvm_handle_fault_on_reboot(insn) \ 956 ____kvm_handle_fault_on_reboot(insn, "") 957 958 #define KVM_ARCH_WANT_MMU_NOTIFIER 959 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 960 int kvm_age_hva(struct kvm *kvm, unsigned long hva); 961 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); 962 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 963 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu); 964 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu); 965 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu); 966 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 967 968 void kvm_define_shared_msr(unsigned index, u32 msr); 969 void kvm_set_shared_msr(unsigned index, u64 val, u64 mask); 970 971 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip); 972 973 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, 974 struct kvm_async_pf *work); 975 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, 976 struct kvm_async_pf *work); 977 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, 978 struct kvm_async_pf *work); 979 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu); 980 extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn); 981 982 void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err); 983 984 int kvm_is_in_guest(void); 985 986 void kvm_pmu_init(struct kvm_vcpu *vcpu); 987 void kvm_pmu_destroy(struct kvm_vcpu *vcpu); 988 void kvm_pmu_reset(struct kvm_vcpu *vcpu); 989 void kvm_pmu_cpuid_update(struct kvm_vcpu *vcpu); 990 bool kvm_pmu_msr(struct kvm_vcpu *vcpu, u32 msr); 991 int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *data); 992 int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data); 993 int kvm_pmu_read_pmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data); 994 void kvm_handle_pmu_event(struct kvm_vcpu *vcpu); 995 void kvm_deliver_pmi(struct kvm_vcpu *vcpu); 996 997 #endif /* _ASM_X86_KVM_HOST_H */ 998