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