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