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 19 #include <linux/kvm.h> 20 #include <linux/kvm_para.h> 21 #include <linux/kvm_types.h> 22 23 #include <asm/pvclock-abi.h> 24 #include <asm/desc.h> 25 #include <asm/mtrr.h> 26 #include <asm/msr-index.h> 27 28 #define KVM_MAX_VCPUS 16 29 #define KVM_MEMORY_SLOTS 32 30 /* memory slots that does not exposed to userspace */ 31 #define KVM_PRIVATE_MEM_SLOTS 4 32 33 #define KVM_PIO_PAGE_OFFSET 1 34 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2 35 36 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1) 37 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD)) 38 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \ 39 0xFFFFFF0000000000ULL) 40 41 #define KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST \ 42 (X86_CR0_WP | X86_CR0_NE | X86_CR0_NW | X86_CR0_CD) 43 #define KVM_GUEST_CR0_MASK \ 44 (KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE) 45 #define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST \ 46 (X86_CR0_WP | X86_CR0_NE | X86_CR0_TS | X86_CR0_MP) 47 #define KVM_VM_CR0_ALWAYS_ON \ 48 (KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE) 49 #define KVM_GUEST_CR4_MASK \ 50 (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE) 51 #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE) 52 #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE) 53 54 #define INVALID_PAGE (~(hpa_t)0) 55 #define UNMAPPED_GVA (~(gpa_t)0) 56 57 /* KVM Hugepage definitions for x86 */ 58 #define KVM_NR_PAGE_SIZES 3 59 #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + (((x) - 1) * 9)) 60 #define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x)) 61 #define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1)) 62 #define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE) 63 64 #define DE_VECTOR 0 65 #define DB_VECTOR 1 66 #define BP_VECTOR 3 67 #define OF_VECTOR 4 68 #define BR_VECTOR 5 69 #define UD_VECTOR 6 70 #define NM_VECTOR 7 71 #define DF_VECTOR 8 72 #define TS_VECTOR 10 73 #define NP_VECTOR 11 74 #define SS_VECTOR 12 75 #define GP_VECTOR 13 76 #define PF_VECTOR 14 77 #define MF_VECTOR 16 78 #define MC_VECTOR 18 79 80 #define SELECTOR_TI_MASK (1 << 2) 81 #define SELECTOR_RPL_MASK 0x03 82 83 #define IOPL_SHIFT 12 84 85 #define KVM_ALIAS_SLOTS 4 86 87 #define KVM_PERMILLE_MMU_PAGES 20 88 #define KVM_MIN_ALLOC_MMU_PAGES 64 89 #define KVM_MMU_HASH_SHIFT 10 90 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT) 91 #define KVM_MIN_FREE_MMU_PAGES 5 92 #define KVM_REFILL_PAGES 25 93 #define KVM_MAX_CPUID_ENTRIES 40 94 #define KVM_NR_FIXED_MTRR_REGION 88 95 #define KVM_NR_VAR_MTRR 8 96 97 extern spinlock_t kvm_lock; 98 extern struct list_head vm_list; 99 100 struct kvm_vcpu; 101 struct kvm; 102 103 enum kvm_reg { 104 VCPU_REGS_RAX = 0, 105 VCPU_REGS_RCX = 1, 106 VCPU_REGS_RDX = 2, 107 VCPU_REGS_RBX = 3, 108 VCPU_REGS_RSP = 4, 109 VCPU_REGS_RBP = 5, 110 VCPU_REGS_RSI = 6, 111 VCPU_REGS_RDI = 7, 112 #ifdef CONFIG_X86_64 113 VCPU_REGS_R8 = 8, 114 VCPU_REGS_R9 = 9, 115 VCPU_REGS_R10 = 10, 116 VCPU_REGS_R11 = 11, 117 VCPU_REGS_R12 = 12, 118 VCPU_REGS_R13 = 13, 119 VCPU_REGS_R14 = 14, 120 VCPU_REGS_R15 = 15, 121 #endif 122 VCPU_REGS_RIP, 123 NR_VCPU_REGS 124 }; 125 126 enum kvm_reg_ex { 127 VCPU_EXREG_PDPTR = NR_VCPU_REGS, 128 }; 129 130 enum { 131 VCPU_SREG_ES, 132 VCPU_SREG_CS, 133 VCPU_SREG_SS, 134 VCPU_SREG_DS, 135 VCPU_SREG_FS, 136 VCPU_SREG_GS, 137 VCPU_SREG_TR, 138 VCPU_SREG_LDTR, 139 }; 140 141 #include <asm/kvm_emulate.h> 142 143 #define KVM_NR_MEM_OBJS 40 144 145 #define KVM_NR_DB_REGS 4 146 147 #define DR6_BD (1 << 13) 148 #define DR6_BS (1 << 14) 149 #define DR6_FIXED_1 0xffff0ff0 150 #define DR6_VOLATILE 0x0000e00f 151 152 #define DR7_BP_EN_MASK 0x000000ff 153 #define DR7_GE (1 << 9) 154 #define DR7_GD (1 << 13) 155 #define DR7_FIXED_1 0x00000400 156 #define DR7_VOLATILE 0xffff23ff 157 158 /* 159 * We don't want allocation failures within the mmu code, so we preallocate 160 * enough memory for a single page fault in a cache. 161 */ 162 struct kvm_mmu_memory_cache { 163 int nobjs; 164 void *objects[KVM_NR_MEM_OBJS]; 165 }; 166 167 #define NR_PTE_CHAIN_ENTRIES 5 168 169 struct kvm_pte_chain { 170 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES]; 171 struct hlist_node link; 172 }; 173 174 /* 175 * kvm_mmu_page_role, below, is defined as: 176 * 177 * bits 0:3 - total guest paging levels (2-4, or zero for real mode) 178 * bits 4:7 - page table level for this shadow (1-4) 179 * bits 8:9 - page table quadrant for 2-level guests 180 * bit 16 - direct mapping of virtual to physical mapping at gfn 181 * used for real mode and two-dimensional paging 182 * bits 17:19 - common access permissions for all ptes in this shadow page 183 */ 184 union kvm_mmu_page_role { 185 unsigned word; 186 struct { 187 unsigned glevels:4; 188 unsigned level:4; 189 unsigned quadrant:2; 190 unsigned pad_for_nice_hex_output:6; 191 unsigned direct:1; 192 unsigned access:3; 193 unsigned invalid:1; 194 unsigned cr4_pge:1; 195 unsigned nxe:1; 196 }; 197 }; 198 199 struct kvm_mmu_page { 200 struct list_head link; 201 struct hlist_node hash_link; 202 203 struct list_head oos_link; 204 205 /* 206 * The following two entries are used to key the shadow page in the 207 * hash table. 208 */ 209 gfn_t gfn; 210 union kvm_mmu_page_role role; 211 212 u64 *spt; 213 /* hold the gfn of each spte inside spt */ 214 gfn_t *gfns; 215 /* 216 * One bit set per slot which has memory 217 * in this shadow page. 218 */ 219 DECLARE_BITMAP(slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS); 220 int multimapped; /* More than one parent_pte? */ 221 int root_count; /* Currently serving as active root */ 222 bool unsync; 223 unsigned int unsync_children; 224 union { 225 u64 *parent_pte; /* !multimapped */ 226 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */ 227 }; 228 DECLARE_BITMAP(unsync_child_bitmap, 512); 229 }; 230 231 struct kvm_pv_mmu_op_buffer { 232 void *ptr; 233 unsigned len; 234 unsigned processed; 235 char buf[512] __aligned(sizeof(long)); 236 }; 237 238 struct kvm_pio_request { 239 unsigned long count; 240 int cur_count; 241 gva_t guest_gva; 242 int in; 243 int port; 244 int size; 245 int string; 246 int down; 247 int rep; 248 }; 249 250 /* 251 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level 252 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu 253 * mode. 254 */ 255 struct kvm_mmu { 256 void (*new_cr3)(struct kvm_vcpu *vcpu); 257 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err); 258 void (*free)(struct kvm_vcpu *vcpu); 259 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva); 260 void (*prefetch_page)(struct kvm_vcpu *vcpu, 261 struct kvm_mmu_page *page); 262 int (*sync_page)(struct kvm_vcpu *vcpu, 263 struct kvm_mmu_page *sp); 264 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva); 265 hpa_t root_hpa; 266 int root_level; 267 int shadow_root_level; 268 union kvm_mmu_page_role base_role; 269 270 u64 *pae_root; 271 u64 rsvd_bits_mask[2][4]; 272 }; 273 274 struct kvm_vcpu_arch { 275 u64 host_tsc; 276 /* 277 * rip and regs accesses must go through 278 * kvm_{register,rip}_{read,write} functions. 279 */ 280 unsigned long regs[NR_VCPU_REGS]; 281 u32 regs_avail; 282 u32 regs_dirty; 283 284 unsigned long cr0; 285 unsigned long cr2; 286 unsigned long cr3; 287 unsigned long cr4; 288 unsigned long cr8; 289 u32 hflags; 290 u64 pdptrs[4]; /* pae */ 291 u64 shadow_efer; 292 u64 apic_base; 293 struct kvm_lapic *apic; /* kernel irqchip context */ 294 int32_t apic_arb_prio; 295 int mp_state; 296 int sipi_vector; 297 u64 ia32_misc_enable_msr; 298 bool tpr_access_reporting; 299 300 struct kvm_mmu mmu; 301 /* only needed in kvm_pv_mmu_op() path, but it's hot so 302 * put it here to avoid allocation */ 303 struct kvm_pv_mmu_op_buffer mmu_op_buffer; 304 305 struct kvm_mmu_memory_cache mmu_pte_chain_cache; 306 struct kvm_mmu_memory_cache mmu_rmap_desc_cache; 307 struct kvm_mmu_memory_cache mmu_page_cache; 308 struct kvm_mmu_memory_cache mmu_page_header_cache; 309 310 gfn_t last_pt_write_gfn; 311 int last_pt_write_count; 312 u64 *last_pte_updated; 313 gfn_t last_pte_gfn; 314 315 struct { 316 gfn_t gfn; /* presumed gfn during guest pte update */ 317 pfn_t pfn; /* pfn corresponding to that gfn */ 318 unsigned long mmu_seq; 319 } update_pte; 320 321 struct i387_fxsave_struct host_fx_image; 322 struct i387_fxsave_struct guest_fx_image; 323 324 gva_t mmio_fault_cr2; 325 struct kvm_pio_request pio; 326 void *pio_data; 327 328 u8 event_exit_inst_len; 329 330 struct kvm_queued_exception { 331 bool pending; 332 bool has_error_code; 333 u8 nr; 334 u32 error_code; 335 } exception; 336 337 struct kvm_queued_interrupt { 338 bool pending; 339 bool soft; 340 u8 nr; 341 } interrupt; 342 343 int halt_request; /* real mode on Intel only */ 344 345 int cpuid_nent; 346 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES]; 347 /* emulate context */ 348 349 struct x86_emulate_ctxt emulate_ctxt; 350 351 gpa_t time; 352 struct pvclock_vcpu_time_info hv_clock; 353 unsigned int hv_clock_tsc_khz; 354 unsigned int time_offset; 355 struct page *time_page; 356 357 bool nmi_pending; 358 bool nmi_injected; 359 360 struct mtrr_state_type mtrr_state; 361 u32 pat; 362 363 int switch_db_regs; 364 unsigned long db[KVM_NR_DB_REGS]; 365 unsigned long dr6; 366 unsigned long dr7; 367 unsigned long eff_db[KVM_NR_DB_REGS]; 368 369 u64 mcg_cap; 370 u64 mcg_status; 371 u64 mcg_ctl; 372 u64 *mce_banks; 373 374 /* used for guest single stepping over the given code position */ 375 u16 singlestep_cs; 376 unsigned long singlestep_rip; 377 }; 378 379 struct kvm_mem_alias { 380 gfn_t base_gfn; 381 unsigned long npages; 382 gfn_t target_gfn; 383 }; 384 385 struct kvm_arch{ 386 int naliases; 387 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS]; 388 389 unsigned int n_free_mmu_pages; 390 unsigned int n_requested_mmu_pages; 391 unsigned int n_alloc_mmu_pages; 392 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES]; 393 /* 394 * Hash table of struct kvm_mmu_page. 395 */ 396 struct list_head active_mmu_pages; 397 struct list_head assigned_dev_head; 398 struct iommu_domain *iommu_domain; 399 int iommu_flags; 400 struct kvm_pic *vpic; 401 struct kvm_ioapic *vioapic; 402 struct kvm_pit *vpit; 403 int vapics_in_nmi_mode; 404 405 unsigned int tss_addr; 406 struct page *apic_access_page; 407 408 gpa_t wall_clock; 409 410 struct page *ept_identity_pagetable; 411 bool ept_identity_pagetable_done; 412 gpa_t ept_identity_map_addr; 413 414 unsigned long irq_sources_bitmap; 415 u64 vm_init_tsc; 416 s64 kvmclock_offset; 417 418 struct kvm_xen_hvm_config xen_hvm_config; 419 }; 420 421 struct kvm_vm_stat { 422 u32 mmu_shadow_zapped; 423 u32 mmu_pte_write; 424 u32 mmu_pte_updated; 425 u32 mmu_pde_zapped; 426 u32 mmu_flooded; 427 u32 mmu_recycled; 428 u32 mmu_cache_miss; 429 u32 mmu_unsync; 430 u32 remote_tlb_flush; 431 u32 lpages; 432 }; 433 434 struct kvm_vcpu_stat { 435 u32 pf_fixed; 436 u32 pf_guest; 437 u32 tlb_flush; 438 u32 invlpg; 439 440 u32 exits; 441 u32 io_exits; 442 u32 mmio_exits; 443 u32 signal_exits; 444 u32 irq_window_exits; 445 u32 nmi_window_exits; 446 u32 halt_exits; 447 u32 halt_wakeup; 448 u32 request_irq_exits; 449 u32 irq_exits; 450 u32 host_state_reload; 451 u32 efer_reload; 452 u32 fpu_reload; 453 u32 insn_emulation; 454 u32 insn_emulation_fail; 455 u32 hypercalls; 456 u32 irq_injections; 457 u32 nmi_injections; 458 }; 459 460 struct descriptor_table { 461 u16 limit; 462 unsigned long base; 463 } __attribute__((packed)); 464 465 struct kvm_x86_ops { 466 int (*cpu_has_kvm_support)(void); /* __init */ 467 int (*disabled_by_bios)(void); /* __init */ 468 int (*hardware_enable)(void *dummy); 469 void (*hardware_disable)(void *dummy); 470 void (*check_processor_compatibility)(void *rtn); 471 int (*hardware_setup)(void); /* __init */ 472 void (*hardware_unsetup)(void); /* __exit */ 473 bool (*cpu_has_accelerated_tpr)(void); 474 475 /* Create, but do not attach this VCPU */ 476 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id); 477 void (*vcpu_free)(struct kvm_vcpu *vcpu); 478 int (*vcpu_reset)(struct kvm_vcpu *vcpu); 479 480 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu); 481 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu); 482 void (*vcpu_put)(struct kvm_vcpu *vcpu); 483 484 void (*set_guest_debug)(struct kvm_vcpu *vcpu, 485 struct kvm_guest_debug *dbg); 486 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata); 487 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 488 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg); 489 void (*get_segment)(struct kvm_vcpu *vcpu, 490 struct kvm_segment *var, int seg); 491 int (*get_cpl)(struct kvm_vcpu *vcpu); 492 void (*set_segment)(struct kvm_vcpu *vcpu, 493 struct kvm_segment *var, int seg); 494 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l); 495 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu); 496 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0); 497 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 498 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4); 499 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer); 500 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt); 501 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt); 502 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt); 503 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt); 504 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr); 505 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value, 506 int *exception); 507 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg); 508 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu); 509 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags); 510 511 void (*tlb_flush)(struct kvm_vcpu *vcpu); 512 513 void (*run)(struct kvm_vcpu *vcpu); 514 int (*handle_exit)(struct kvm_vcpu *vcpu); 515 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu); 516 void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 517 u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 518 void (*patch_hypercall)(struct kvm_vcpu *vcpu, 519 unsigned char *hypercall_addr); 520 void (*set_irq)(struct kvm_vcpu *vcpu); 521 void (*set_nmi)(struct kvm_vcpu *vcpu); 522 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr, 523 bool has_error_code, u32 error_code); 524 int (*interrupt_allowed)(struct kvm_vcpu *vcpu); 525 int (*nmi_allowed)(struct kvm_vcpu *vcpu); 526 bool (*get_nmi_mask)(struct kvm_vcpu *vcpu); 527 void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked); 528 void (*enable_nmi_window)(struct kvm_vcpu *vcpu); 529 void (*enable_irq_window)(struct kvm_vcpu *vcpu); 530 void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr); 531 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr); 532 int (*get_tdp_level)(void); 533 u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio); 534 bool (*gb_page_enable)(void); 535 536 const struct trace_print_flags *exit_reasons_str; 537 }; 538 539 extern struct kvm_x86_ops *kvm_x86_ops; 540 541 int kvm_mmu_module_init(void); 542 void kvm_mmu_module_exit(void); 543 544 void kvm_mmu_destroy(struct kvm_vcpu *vcpu); 545 int kvm_mmu_create(struct kvm_vcpu *vcpu); 546 int kvm_mmu_setup(struct kvm_vcpu *vcpu); 547 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte); 548 void kvm_mmu_set_base_ptes(u64 base_pte); 549 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask, 550 u64 dirty_mask, u64 nx_mask, u64 x_mask); 551 552 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu); 553 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot); 554 void kvm_mmu_zap_all(struct kvm *kvm); 555 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm); 556 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages); 557 558 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3); 559 560 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, 561 const void *val, int bytes); 562 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes, 563 gpa_t addr, unsigned long *ret); 564 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn); 565 566 extern bool tdp_enabled; 567 568 enum emulation_result { 569 EMULATE_DONE, /* no further processing */ 570 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */ 571 EMULATE_FAIL, /* can't emulate this instruction */ 572 }; 573 574 #define EMULTYPE_NO_DECODE (1 << 0) 575 #define EMULTYPE_TRAP_UD (1 << 1) 576 #define EMULTYPE_SKIP (1 << 2) 577 int emulate_instruction(struct kvm_vcpu *vcpu, 578 unsigned long cr2, u16 error_code, int emulation_type); 579 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context); 580 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address); 581 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address); 582 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, 583 unsigned long *rflags); 584 585 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr); 586 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value, 587 unsigned long *rflags); 588 void kvm_enable_efer_bits(u64); 589 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data); 590 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 591 592 struct x86_emulate_ctxt; 593 594 int kvm_emulate_pio(struct kvm_vcpu *vcpu, int in, 595 int size, unsigned port); 596 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, int in, 597 int size, unsigned long count, int down, 598 gva_t address, int rep, unsigned port); 599 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu); 600 int kvm_emulate_halt(struct kvm_vcpu *vcpu); 601 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address); 602 int emulate_clts(struct kvm_vcpu *vcpu); 603 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, 604 unsigned long *dest); 605 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, 606 unsigned long value); 607 608 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); 609 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, 610 int type_bits, int seg); 611 612 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason); 613 614 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0); 615 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3); 616 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); 617 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8); 618 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu); 619 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw); 620 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l); 621 622 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata); 623 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data); 624 625 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu); 626 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); 627 628 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr); 629 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 630 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2, 631 u32 error_code); 632 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl); 633 634 int kvm_pic_set_irq(void *opaque, int irq, int level); 635 636 void kvm_inject_nmi(struct kvm_vcpu *vcpu); 637 638 void fx_init(struct kvm_vcpu *vcpu); 639 640 int emulator_write_emulated(unsigned long addr, 641 const void *val, 642 unsigned int bytes, 643 struct kvm_vcpu *vcpu); 644 645 unsigned long segment_base(u16 selector); 646 647 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu); 648 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, 649 const u8 *new, int bytes, 650 bool guest_initiated); 651 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva); 652 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu); 653 int kvm_mmu_load(struct kvm_vcpu *vcpu); 654 void kvm_mmu_unload(struct kvm_vcpu *vcpu); 655 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu); 656 657 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu); 658 659 int kvm_fix_hypercall(struct kvm_vcpu *vcpu); 660 661 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code); 662 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva); 663 664 void kvm_enable_tdp(void); 665 void kvm_disable_tdp(void); 666 667 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3); 668 int complete_pio(struct kvm_vcpu *vcpu); 669 670 struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn); 671 672 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page) 673 { 674 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT); 675 676 return (struct kvm_mmu_page *)page_private(page); 677 } 678 679 static inline u16 kvm_read_fs(void) 680 { 681 u16 seg; 682 asm("mov %%fs, %0" : "=g"(seg)); 683 return seg; 684 } 685 686 static inline u16 kvm_read_gs(void) 687 { 688 u16 seg; 689 asm("mov %%gs, %0" : "=g"(seg)); 690 return seg; 691 } 692 693 static inline u16 kvm_read_ldt(void) 694 { 695 u16 ldt; 696 asm("sldt %0" : "=g"(ldt)); 697 return ldt; 698 } 699 700 static inline void kvm_load_fs(u16 sel) 701 { 702 asm("mov %0, %%fs" : : "rm"(sel)); 703 } 704 705 static inline void kvm_load_gs(u16 sel) 706 { 707 asm("mov %0, %%gs" : : "rm"(sel)); 708 } 709 710 static inline void kvm_load_ldt(u16 sel) 711 { 712 asm("lldt %0" : : "rm"(sel)); 713 } 714 715 static inline void kvm_get_idt(struct descriptor_table *table) 716 { 717 asm("sidt %0" : "=m"(*table)); 718 } 719 720 static inline void kvm_get_gdt(struct descriptor_table *table) 721 { 722 asm("sgdt %0" : "=m"(*table)); 723 } 724 725 static inline unsigned long kvm_read_tr_base(void) 726 { 727 u16 tr; 728 asm("str %0" : "=g"(tr)); 729 return segment_base(tr); 730 } 731 732 #ifdef CONFIG_X86_64 733 static inline unsigned long read_msr(unsigned long msr) 734 { 735 u64 value; 736 737 rdmsrl(msr, value); 738 return value; 739 } 740 #endif 741 742 static inline void kvm_fx_save(struct i387_fxsave_struct *image) 743 { 744 asm("fxsave (%0)":: "r" (image)); 745 } 746 747 static inline void kvm_fx_restore(struct i387_fxsave_struct *image) 748 { 749 asm("fxrstor (%0)":: "r" (image)); 750 } 751 752 static inline void kvm_fx_finit(void) 753 { 754 asm("finit"); 755 } 756 757 static inline u32 get_rdx_init_val(void) 758 { 759 return 0x600; /* P6 family */ 760 } 761 762 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code) 763 { 764 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code); 765 } 766 767 #define TSS_IOPB_BASE_OFFSET 0x66 768 #define TSS_BASE_SIZE 0x68 769 #define TSS_IOPB_SIZE (65536 / 8) 770 #define TSS_REDIRECTION_SIZE (256 / 8) 771 #define RMODE_TSS_SIZE \ 772 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1) 773 774 enum { 775 TASK_SWITCH_CALL = 0, 776 TASK_SWITCH_IRET = 1, 777 TASK_SWITCH_JMP = 2, 778 TASK_SWITCH_GATE = 3, 779 }; 780 781 #define HF_GIF_MASK (1 << 0) 782 #define HF_HIF_MASK (1 << 1) 783 #define HF_VINTR_MASK (1 << 2) 784 #define HF_NMI_MASK (1 << 3) 785 #define HF_IRET_MASK (1 << 4) 786 787 /* 788 * Hardware virtualization extension instructions may fault if a 789 * reboot turns off virtualization while processes are running. 790 * Trap the fault and ignore the instruction if that happens. 791 */ 792 asmlinkage void kvm_handle_fault_on_reboot(void); 793 794 #define __kvm_handle_fault_on_reboot(insn) \ 795 "666: " insn "\n\t" \ 796 ".pushsection .fixup, \"ax\" \n" \ 797 "667: \n\t" \ 798 __ASM_SIZE(push) " $666b \n\t" \ 799 "jmp kvm_handle_fault_on_reboot \n\t" \ 800 ".popsection \n\t" \ 801 ".pushsection __ex_table, \"a\" \n\t" \ 802 _ASM_PTR " 666b, 667b \n\t" \ 803 ".popsection" 804 805 #define KVM_ARCH_WANT_MMU_NOTIFIER 806 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 807 int kvm_age_hva(struct kvm *kvm, unsigned long hva); 808 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 809 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu); 810 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu); 811 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu); 812 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 813 814 void kvm_define_shared_msr(unsigned index, u32 msr); 815 void kvm_set_shared_msr(unsigned index, u64 val, u64 mask); 816 817 #endif /* _ASM_X86_KVM_HOST_H */ 818