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 34 #define KVM_PIO_PAGE_OFFSET 1 35 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2 36 37 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1) 38 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD)) 39 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \ 40 0xFFFFFF0000000000ULL) 41 42 #define INVALID_PAGE (~(hpa_t)0) 43 #define VALID_PAGE(x) ((x) != INVALID_PAGE) 44 45 #define UNMAPPED_GVA (~(gpa_t)0) 46 47 /* KVM Hugepage definitions for x86 */ 48 #define KVM_NR_PAGE_SIZES 3 49 #define KVM_HPAGE_GFN_SHIFT(x) (((x) - 1) * 9) 50 #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + KVM_HPAGE_GFN_SHIFT(x)) 51 #define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x)) 52 #define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1)) 53 #define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE) 54 55 #define DE_VECTOR 0 56 #define DB_VECTOR 1 57 #define BP_VECTOR 3 58 #define OF_VECTOR 4 59 #define BR_VECTOR 5 60 #define UD_VECTOR 6 61 #define NM_VECTOR 7 62 #define DF_VECTOR 8 63 #define TS_VECTOR 10 64 #define NP_VECTOR 11 65 #define SS_VECTOR 12 66 #define GP_VECTOR 13 67 #define PF_VECTOR 14 68 #define MF_VECTOR 16 69 #define MC_VECTOR 18 70 71 #define SELECTOR_TI_MASK (1 << 2) 72 #define SELECTOR_RPL_MASK 0x03 73 74 #define IOPL_SHIFT 12 75 76 #define KVM_PERMILLE_MMU_PAGES 20 77 #define KVM_MIN_ALLOC_MMU_PAGES 64 78 #define KVM_MMU_HASH_SHIFT 10 79 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT) 80 #define KVM_MIN_FREE_MMU_PAGES 5 81 #define KVM_REFILL_PAGES 25 82 #define KVM_MAX_CPUID_ENTRIES 40 83 #define KVM_NR_FIXED_MTRR_REGION 88 84 #define KVM_NR_VAR_MTRR 8 85 86 extern spinlock_t kvm_lock; 87 extern struct list_head vm_list; 88 89 struct kvm_vcpu; 90 struct kvm; 91 92 enum kvm_reg { 93 VCPU_REGS_RAX = 0, 94 VCPU_REGS_RCX = 1, 95 VCPU_REGS_RDX = 2, 96 VCPU_REGS_RBX = 3, 97 VCPU_REGS_RSP = 4, 98 VCPU_REGS_RBP = 5, 99 VCPU_REGS_RSI = 6, 100 VCPU_REGS_RDI = 7, 101 #ifdef CONFIG_X86_64 102 VCPU_REGS_R8 = 8, 103 VCPU_REGS_R9 = 9, 104 VCPU_REGS_R10 = 10, 105 VCPU_REGS_R11 = 11, 106 VCPU_REGS_R12 = 12, 107 VCPU_REGS_R13 = 13, 108 VCPU_REGS_R14 = 14, 109 VCPU_REGS_R15 = 15, 110 #endif 111 VCPU_REGS_RIP, 112 NR_VCPU_REGS 113 }; 114 115 enum kvm_reg_ex { 116 VCPU_EXREG_PDPTR = NR_VCPU_REGS, 117 }; 118 119 enum { 120 VCPU_SREG_ES, 121 VCPU_SREG_CS, 122 VCPU_SREG_SS, 123 VCPU_SREG_DS, 124 VCPU_SREG_FS, 125 VCPU_SREG_GS, 126 VCPU_SREG_TR, 127 VCPU_SREG_LDTR, 128 }; 129 130 #include <asm/kvm_emulate.h> 131 132 #define KVM_NR_MEM_OBJS 40 133 134 #define KVM_NR_DB_REGS 4 135 136 #define DR6_BD (1 << 13) 137 #define DR6_BS (1 << 14) 138 #define DR6_FIXED_1 0xffff0ff0 139 #define DR6_VOLATILE 0x0000e00f 140 141 #define DR7_BP_EN_MASK 0x000000ff 142 #define DR7_GE (1 << 9) 143 #define DR7_GD (1 << 13) 144 #define DR7_FIXED_1 0x00000400 145 #define DR7_VOLATILE 0xffff23ff 146 147 /* 148 * We don't want allocation failures within the mmu code, so we preallocate 149 * enough memory for a single page fault in a cache. 150 */ 151 struct kvm_mmu_memory_cache { 152 int nobjs; 153 void *objects[KVM_NR_MEM_OBJS]; 154 }; 155 156 #define NR_PTE_CHAIN_ENTRIES 5 157 158 struct kvm_pte_chain { 159 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES]; 160 struct hlist_node link; 161 }; 162 163 /* 164 * kvm_mmu_page_role, below, is defined as: 165 * 166 * bits 0:3 - total guest paging levels (2-4, or zero for real mode) 167 * bits 4:7 - page table level for this shadow (1-4) 168 * bits 8:9 - page table quadrant for 2-level guests 169 * bit 16 - direct mapping of virtual to physical mapping at gfn 170 * used for real mode and two-dimensional paging 171 * bits 17:19 - common access permissions for all ptes in this shadow page 172 */ 173 union kvm_mmu_page_role { 174 unsigned word; 175 struct { 176 unsigned level:4; 177 unsigned cr4_pae:1; 178 unsigned quadrant:2; 179 unsigned pad_for_nice_hex_output:6; 180 unsigned direct:1; 181 unsigned access:3; 182 unsigned invalid:1; 183 unsigned nxe:1; 184 unsigned cr0_wp:1; 185 }; 186 }; 187 188 struct kvm_mmu_page { 189 struct list_head link; 190 struct hlist_node hash_link; 191 192 /* 193 * The following two entries are used to key the shadow page in the 194 * hash table. 195 */ 196 gfn_t gfn; 197 union kvm_mmu_page_role role; 198 199 u64 *spt; 200 /* hold the gfn of each spte inside spt */ 201 gfn_t *gfns; 202 /* 203 * One bit set per slot which has memory 204 * in this shadow page. 205 */ 206 DECLARE_BITMAP(slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS); 207 bool multimapped; /* More than one parent_pte? */ 208 bool unsync; 209 int root_count; /* Currently serving as active root */ 210 unsigned int unsync_children; 211 union { 212 u64 *parent_pte; /* !multimapped */ 213 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */ 214 }; 215 DECLARE_BITMAP(unsync_child_bitmap, 512); 216 }; 217 218 struct kvm_pv_mmu_op_buffer { 219 void *ptr; 220 unsigned len; 221 unsigned processed; 222 char buf[512] __aligned(sizeof(long)); 223 }; 224 225 struct kvm_pio_request { 226 unsigned long count; 227 int in; 228 int port; 229 int size; 230 }; 231 232 /* 233 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level 234 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu 235 * mode. 236 */ 237 struct kvm_mmu { 238 void (*new_cr3)(struct kvm_vcpu *vcpu); 239 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root); 240 unsigned long (*get_cr3)(struct kvm_vcpu *vcpu); 241 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err); 242 void (*inject_page_fault)(struct kvm_vcpu *vcpu); 243 void (*free)(struct kvm_vcpu *vcpu); 244 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access, 245 u32 *error); 246 gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access); 247 void (*prefetch_page)(struct kvm_vcpu *vcpu, 248 struct kvm_mmu_page *page); 249 int (*sync_page)(struct kvm_vcpu *vcpu, 250 struct kvm_mmu_page *sp, bool clear_unsync); 251 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva); 252 hpa_t root_hpa; 253 int root_level; 254 int shadow_root_level; 255 union kvm_mmu_page_role base_role; 256 bool direct_map; 257 258 u64 *pae_root; 259 u64 *lm_root; 260 u64 rsvd_bits_mask[2][4]; 261 262 bool nx; 263 264 u64 pdptrs[4]; /* pae */ 265 }; 266 267 struct kvm_vcpu_arch { 268 /* 269 * rip and regs accesses must go through 270 * kvm_{register,rip}_{read,write} functions. 271 */ 272 unsigned long regs[NR_VCPU_REGS]; 273 u32 regs_avail; 274 u32 regs_dirty; 275 276 unsigned long cr0; 277 unsigned long cr0_guest_owned_bits; 278 unsigned long cr2; 279 unsigned long cr3; 280 unsigned long cr4; 281 unsigned long cr4_guest_owned_bits; 282 unsigned long cr8; 283 u32 hflags; 284 u64 efer; 285 u64 apic_base; 286 struct kvm_lapic *apic; /* kernel irqchip context */ 287 int32_t apic_arb_prio; 288 int mp_state; 289 int sipi_vector; 290 u64 ia32_misc_enable_msr; 291 bool tpr_access_reporting; 292 293 /* 294 * Paging state of the vcpu 295 * 296 * If the vcpu runs in guest mode with two level paging this still saves 297 * the paging mode of the l1 guest. This context is always used to 298 * handle faults. 299 */ 300 struct kvm_mmu mmu; 301 302 /* 303 * Paging state of an L2 guest (used for nested npt) 304 * 305 * This context will save all necessary information to walk page tables 306 * of the an L2 guest. This context is only initialized for page table 307 * walking and not for faulting since we never handle l2 page faults on 308 * the host. 309 */ 310 struct kvm_mmu nested_mmu; 311 312 /* 313 * Pointer to the mmu context currently used for 314 * gva_to_gpa translations. 315 */ 316 struct kvm_mmu *walk_mmu; 317 318 /* 319 * This struct is filled with the necessary information to propagate a 320 * page fault into the guest 321 */ 322 struct { 323 u64 address; 324 unsigned error_code; 325 bool nested; 326 } fault; 327 328 /* only needed in kvm_pv_mmu_op() path, but it's hot so 329 * put it here to avoid allocation */ 330 struct kvm_pv_mmu_op_buffer mmu_op_buffer; 331 332 struct kvm_mmu_memory_cache mmu_pte_chain_cache; 333 struct kvm_mmu_memory_cache mmu_rmap_desc_cache; 334 struct kvm_mmu_memory_cache mmu_page_cache; 335 struct kvm_mmu_memory_cache mmu_page_header_cache; 336 337 gfn_t last_pt_write_gfn; 338 int last_pt_write_count; 339 u64 *last_pte_updated; 340 gfn_t last_pte_gfn; 341 342 struct { 343 gfn_t gfn; /* presumed gfn during guest pte update */ 344 pfn_t pfn; /* pfn corresponding to that gfn */ 345 unsigned long mmu_seq; 346 } update_pte; 347 348 struct fpu guest_fpu; 349 u64 xcr0; 350 351 gva_t mmio_fault_cr2; 352 struct kvm_pio_request pio; 353 void *pio_data; 354 355 u8 event_exit_inst_len; 356 357 struct kvm_queued_exception { 358 bool pending; 359 bool has_error_code; 360 bool reinject; 361 u8 nr; 362 u32 error_code; 363 } exception; 364 365 struct kvm_queued_interrupt { 366 bool pending; 367 bool soft; 368 u8 nr; 369 } interrupt; 370 371 int halt_request; /* real mode on Intel only */ 372 373 int cpuid_nent; 374 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES]; 375 /* emulate context */ 376 377 struct x86_emulate_ctxt emulate_ctxt; 378 379 gpa_t time; 380 struct pvclock_vcpu_time_info hv_clock; 381 unsigned int hw_tsc_khz; 382 unsigned int time_offset; 383 struct page *time_page; 384 u64 last_host_tsc; 385 u64 last_guest_tsc; 386 u64 last_kernel_ns; 387 u64 last_tsc_nsec; 388 u64 last_tsc_write; 389 bool tsc_catchup; 390 391 bool nmi_pending; 392 bool nmi_injected; 393 394 struct mtrr_state_type mtrr_state; 395 u32 pat; 396 397 int switch_db_regs; 398 unsigned long db[KVM_NR_DB_REGS]; 399 unsigned long dr6; 400 unsigned long dr7; 401 unsigned long eff_db[KVM_NR_DB_REGS]; 402 403 u64 mcg_cap; 404 u64 mcg_status; 405 u64 mcg_ctl; 406 u64 *mce_banks; 407 408 /* used for guest single stepping over the given code position */ 409 unsigned long singlestep_rip; 410 411 /* fields used by HYPER-V emulation */ 412 u64 hv_vapic; 413 414 cpumask_var_t wbinvd_dirty_mask; 415 }; 416 417 struct kvm_arch { 418 unsigned int n_used_mmu_pages; 419 unsigned int n_requested_mmu_pages; 420 unsigned int n_max_mmu_pages; 421 atomic_t invlpg_counter; 422 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES]; 423 /* 424 * Hash table of struct kvm_mmu_page. 425 */ 426 struct list_head active_mmu_pages; 427 struct list_head assigned_dev_head; 428 struct iommu_domain *iommu_domain; 429 int iommu_flags; 430 struct kvm_pic *vpic; 431 struct kvm_ioapic *vioapic; 432 struct kvm_pit *vpit; 433 int vapics_in_nmi_mode; 434 435 unsigned int tss_addr; 436 struct page *apic_access_page; 437 438 gpa_t wall_clock; 439 440 struct page *ept_identity_pagetable; 441 bool ept_identity_pagetable_done; 442 gpa_t ept_identity_map_addr; 443 444 unsigned long irq_sources_bitmap; 445 s64 kvmclock_offset; 446 spinlock_t tsc_write_lock; 447 u64 last_tsc_nsec; 448 u64 last_tsc_offset; 449 u64 last_tsc_write; 450 u32 virtual_tsc_khz; 451 u32 virtual_tsc_mult; 452 s8 virtual_tsc_shift; 453 454 struct kvm_xen_hvm_config xen_hvm_config; 455 456 /* fields used by HYPER-V emulation */ 457 u64 hv_guest_os_id; 458 u64 hv_hypercall; 459 }; 460 461 struct kvm_vm_stat { 462 u32 mmu_shadow_zapped; 463 u32 mmu_pte_write; 464 u32 mmu_pte_updated; 465 u32 mmu_pde_zapped; 466 u32 mmu_flooded; 467 u32 mmu_recycled; 468 u32 mmu_cache_miss; 469 u32 mmu_unsync; 470 u32 remote_tlb_flush; 471 u32 lpages; 472 }; 473 474 struct kvm_vcpu_stat { 475 u32 pf_fixed; 476 u32 pf_guest; 477 u32 tlb_flush; 478 u32 invlpg; 479 480 u32 exits; 481 u32 io_exits; 482 u32 mmio_exits; 483 u32 signal_exits; 484 u32 irq_window_exits; 485 u32 nmi_window_exits; 486 u32 halt_exits; 487 u32 halt_wakeup; 488 u32 request_irq_exits; 489 u32 irq_exits; 490 u32 host_state_reload; 491 u32 efer_reload; 492 u32 fpu_reload; 493 u32 insn_emulation; 494 u32 insn_emulation_fail; 495 u32 hypercalls; 496 u32 irq_injections; 497 u32 nmi_injections; 498 }; 499 500 struct kvm_x86_ops { 501 int (*cpu_has_kvm_support)(void); /* __init */ 502 int (*disabled_by_bios)(void); /* __init */ 503 int (*hardware_enable)(void *dummy); 504 void (*hardware_disable)(void *dummy); 505 void (*check_processor_compatibility)(void *rtn); 506 int (*hardware_setup)(void); /* __init */ 507 void (*hardware_unsetup)(void); /* __exit */ 508 bool (*cpu_has_accelerated_tpr)(void); 509 void (*cpuid_update)(struct kvm_vcpu *vcpu); 510 511 /* Create, but do not attach this VCPU */ 512 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id); 513 void (*vcpu_free)(struct kvm_vcpu *vcpu); 514 int (*vcpu_reset)(struct kvm_vcpu *vcpu); 515 516 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu); 517 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu); 518 void (*vcpu_put)(struct kvm_vcpu *vcpu); 519 520 void (*set_guest_debug)(struct kvm_vcpu *vcpu, 521 struct kvm_guest_debug *dbg); 522 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata); 523 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 524 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg); 525 void (*get_segment)(struct kvm_vcpu *vcpu, 526 struct kvm_segment *var, int seg); 527 int (*get_cpl)(struct kvm_vcpu *vcpu); 528 void (*set_segment)(struct kvm_vcpu *vcpu, 529 struct kvm_segment *var, int seg); 530 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l); 531 void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu); 532 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu); 533 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0); 534 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 535 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4); 536 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer); 537 void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 538 void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 539 void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 540 void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 541 void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value); 542 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg); 543 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu); 544 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags); 545 void (*fpu_activate)(struct kvm_vcpu *vcpu); 546 void (*fpu_deactivate)(struct kvm_vcpu *vcpu); 547 548 void (*tlb_flush)(struct kvm_vcpu *vcpu); 549 550 void (*run)(struct kvm_vcpu *vcpu); 551 int (*handle_exit)(struct kvm_vcpu *vcpu); 552 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu); 553 void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 554 u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 555 void (*patch_hypercall)(struct kvm_vcpu *vcpu, 556 unsigned char *hypercall_addr); 557 void (*set_irq)(struct kvm_vcpu *vcpu); 558 void (*set_nmi)(struct kvm_vcpu *vcpu); 559 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr, 560 bool has_error_code, u32 error_code, 561 bool reinject); 562 void (*cancel_injection)(struct kvm_vcpu *vcpu); 563 int (*interrupt_allowed)(struct kvm_vcpu *vcpu); 564 int (*nmi_allowed)(struct kvm_vcpu *vcpu); 565 bool (*get_nmi_mask)(struct kvm_vcpu *vcpu); 566 void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked); 567 void (*enable_nmi_window)(struct kvm_vcpu *vcpu); 568 void (*enable_irq_window)(struct kvm_vcpu *vcpu); 569 void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr); 570 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr); 571 int (*get_tdp_level)(void); 572 u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio); 573 int (*get_lpage_level)(void); 574 bool (*rdtscp_supported)(void); 575 void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment); 576 577 void (*set_tdp_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 578 579 void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry); 580 581 bool (*has_wbinvd_exit)(void); 582 583 void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset); 584 585 const struct trace_print_flags *exit_reasons_str; 586 }; 587 588 extern struct kvm_x86_ops *kvm_x86_ops; 589 590 int kvm_mmu_module_init(void); 591 void kvm_mmu_module_exit(void); 592 593 void kvm_mmu_destroy(struct kvm_vcpu *vcpu); 594 int kvm_mmu_create(struct kvm_vcpu *vcpu); 595 int kvm_mmu_setup(struct kvm_vcpu *vcpu); 596 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte); 597 void kvm_mmu_set_base_ptes(u64 base_pte); 598 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask, 599 u64 dirty_mask, u64 nx_mask, u64 x_mask); 600 601 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu); 602 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot); 603 void kvm_mmu_zap_all(struct kvm *kvm); 604 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm); 605 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages); 606 607 int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3); 608 609 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, 610 const void *val, int bytes); 611 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes, 612 gpa_t addr, unsigned long *ret); 613 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn); 614 615 extern bool tdp_enabled; 616 617 enum emulation_result { 618 EMULATE_DONE, /* no further processing */ 619 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */ 620 EMULATE_FAIL, /* can't emulate this instruction */ 621 }; 622 623 #define EMULTYPE_NO_DECODE (1 << 0) 624 #define EMULTYPE_TRAP_UD (1 << 1) 625 #define EMULTYPE_SKIP (1 << 2) 626 int emulate_instruction(struct kvm_vcpu *vcpu, 627 unsigned long cr2, u16 error_code, int emulation_type); 628 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address); 629 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address); 630 631 void kvm_enable_efer_bits(u64); 632 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data); 633 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 634 635 struct x86_emulate_ctxt; 636 637 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port); 638 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu); 639 int kvm_emulate_halt(struct kvm_vcpu *vcpu); 640 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address); 641 int emulate_clts(struct kvm_vcpu *vcpu); 642 int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu); 643 644 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); 645 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg); 646 647 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason, 648 bool has_error_code, u32 error_code); 649 650 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0); 651 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3); 652 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); 653 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8); 654 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val); 655 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val); 656 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu); 657 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw); 658 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l); 659 int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr); 660 661 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata); 662 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data); 663 664 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu); 665 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); 666 667 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr); 668 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 669 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr); 670 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 671 void kvm_inject_page_fault(struct kvm_vcpu *vcpu); 672 int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, 673 gfn_t gfn, void *data, int offset, int len, 674 u32 access); 675 void kvm_propagate_fault(struct kvm_vcpu *vcpu); 676 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl); 677 678 int kvm_pic_set_irq(void *opaque, int irq, int level); 679 680 void kvm_inject_nmi(struct kvm_vcpu *vcpu); 681 682 int fx_init(struct kvm_vcpu *vcpu); 683 684 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu); 685 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, 686 const u8 *new, int bytes, 687 bool guest_initiated); 688 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva); 689 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu); 690 int kvm_mmu_load(struct kvm_vcpu *vcpu); 691 void kvm_mmu_unload(struct kvm_vcpu *vcpu); 692 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu); 693 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error); 694 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error); 695 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error); 696 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error); 697 698 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu); 699 700 int kvm_fix_hypercall(struct kvm_vcpu *vcpu); 701 702 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code); 703 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva); 704 705 void kvm_enable_tdp(void); 706 void kvm_disable_tdp(void); 707 708 int complete_pio(struct kvm_vcpu *vcpu); 709 bool kvm_check_iopl(struct kvm_vcpu *vcpu); 710 711 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page) 712 { 713 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT); 714 715 return (struct kvm_mmu_page *)page_private(page); 716 } 717 718 static inline u16 kvm_read_ldt(void) 719 { 720 u16 ldt; 721 asm("sldt %0" : "=g"(ldt)); 722 return ldt; 723 } 724 725 static inline void kvm_load_ldt(u16 sel) 726 { 727 asm("lldt %0" : : "rm"(sel)); 728 } 729 730 #ifdef CONFIG_X86_64 731 static inline unsigned long read_msr(unsigned long msr) 732 { 733 u64 value; 734 735 rdmsrl(msr, value); 736 return value; 737 } 738 #endif 739 740 static inline u32 get_rdx_init_val(void) 741 { 742 return 0x600; /* P6 family */ 743 } 744 745 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code) 746 { 747 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code); 748 } 749 750 #define TSS_IOPB_BASE_OFFSET 0x66 751 #define TSS_BASE_SIZE 0x68 752 #define TSS_IOPB_SIZE (65536 / 8) 753 #define TSS_REDIRECTION_SIZE (256 / 8) 754 #define RMODE_TSS_SIZE \ 755 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1) 756 757 enum { 758 TASK_SWITCH_CALL = 0, 759 TASK_SWITCH_IRET = 1, 760 TASK_SWITCH_JMP = 2, 761 TASK_SWITCH_GATE = 3, 762 }; 763 764 #define HF_GIF_MASK (1 << 0) 765 #define HF_HIF_MASK (1 << 1) 766 #define HF_VINTR_MASK (1 << 2) 767 #define HF_NMI_MASK (1 << 3) 768 #define HF_IRET_MASK (1 << 4) 769 770 /* 771 * Hardware virtualization extension instructions may fault if a 772 * reboot turns off virtualization while processes are running. 773 * Trap the fault and ignore the instruction if that happens. 774 */ 775 asmlinkage void kvm_handle_fault_on_reboot(void); 776 777 #define __kvm_handle_fault_on_reboot(insn) \ 778 "666: " insn "\n\t" \ 779 ".pushsection .fixup, \"ax\" \n" \ 780 "667: \n\t" \ 781 __ASM_SIZE(push) " $666b \n\t" \ 782 "jmp kvm_handle_fault_on_reboot \n\t" \ 783 ".popsection \n\t" \ 784 ".pushsection __ex_table, \"a\" \n\t" \ 785 _ASM_PTR " 666b, 667b \n\t" \ 786 ".popsection" 787 788 #define KVM_ARCH_WANT_MMU_NOTIFIER 789 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 790 int kvm_age_hva(struct kvm *kvm, unsigned long hva); 791 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 792 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu); 793 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu); 794 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu); 795 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 796 797 void kvm_define_shared_msr(unsigned index, u32 msr); 798 void kvm_set_shared_msr(unsigned index, u64 val, u64 mask); 799 800 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip); 801 802 #endif /* _ASM_X86_KVM_HOST_H */ 803