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 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err); 240 void (*free)(struct kvm_vcpu *vcpu); 241 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access, 242 u32 *error); 243 void (*prefetch_page)(struct kvm_vcpu *vcpu, 244 struct kvm_mmu_page *page); 245 int (*sync_page)(struct kvm_vcpu *vcpu, 246 struct kvm_mmu_page *sp, bool clear_unsync); 247 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva); 248 hpa_t root_hpa; 249 int root_level; 250 int shadow_root_level; 251 union kvm_mmu_page_role base_role; 252 253 u64 *pae_root; 254 u64 rsvd_bits_mask[2][4]; 255 }; 256 257 struct kvm_vcpu_arch { 258 u64 host_tsc; 259 /* 260 * rip and regs accesses must go through 261 * kvm_{register,rip}_{read,write} functions. 262 */ 263 unsigned long regs[NR_VCPU_REGS]; 264 u32 regs_avail; 265 u32 regs_dirty; 266 267 unsigned long cr0; 268 unsigned long cr0_guest_owned_bits; 269 unsigned long cr2; 270 unsigned long cr3; 271 unsigned long cr4; 272 unsigned long cr4_guest_owned_bits; 273 unsigned long cr8; 274 u32 hflags; 275 u64 pdptrs[4]; /* pae */ 276 u64 efer; 277 u64 apic_base; 278 struct kvm_lapic *apic; /* kernel irqchip context */ 279 int32_t apic_arb_prio; 280 int mp_state; 281 int sipi_vector; 282 u64 ia32_misc_enable_msr; 283 bool tpr_access_reporting; 284 285 struct kvm_mmu mmu; 286 /* only needed in kvm_pv_mmu_op() path, but it's hot so 287 * put it here to avoid allocation */ 288 struct kvm_pv_mmu_op_buffer mmu_op_buffer; 289 290 struct kvm_mmu_memory_cache mmu_pte_chain_cache; 291 struct kvm_mmu_memory_cache mmu_rmap_desc_cache; 292 struct kvm_mmu_memory_cache mmu_page_cache; 293 struct kvm_mmu_memory_cache mmu_page_header_cache; 294 295 gfn_t last_pt_write_gfn; 296 int last_pt_write_count; 297 u64 *last_pte_updated; 298 gfn_t last_pte_gfn; 299 300 struct { 301 gfn_t gfn; /* presumed gfn during guest pte update */ 302 pfn_t pfn; /* pfn corresponding to that gfn */ 303 unsigned long mmu_seq; 304 } update_pte; 305 306 struct fpu guest_fpu; 307 u64 xcr0; 308 309 gva_t mmio_fault_cr2; 310 struct kvm_pio_request pio; 311 void *pio_data; 312 313 u8 event_exit_inst_len; 314 315 struct kvm_queued_exception { 316 bool pending; 317 bool has_error_code; 318 bool reinject; 319 u8 nr; 320 u32 error_code; 321 } exception; 322 323 struct kvm_queued_interrupt { 324 bool pending; 325 bool soft; 326 u8 nr; 327 } interrupt; 328 329 int halt_request; /* real mode on Intel only */ 330 331 int cpuid_nent; 332 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES]; 333 /* emulate context */ 334 335 struct x86_emulate_ctxt emulate_ctxt; 336 337 gpa_t time; 338 struct pvclock_vcpu_time_info hv_clock; 339 unsigned int hv_clock_tsc_khz; 340 unsigned int time_offset; 341 struct page *time_page; 342 343 bool nmi_pending; 344 bool nmi_injected; 345 346 struct mtrr_state_type mtrr_state; 347 u32 pat; 348 349 int switch_db_regs; 350 unsigned long db[KVM_NR_DB_REGS]; 351 unsigned long dr6; 352 unsigned long dr7; 353 unsigned long eff_db[KVM_NR_DB_REGS]; 354 355 u64 mcg_cap; 356 u64 mcg_status; 357 u64 mcg_ctl; 358 u64 *mce_banks; 359 360 /* used for guest single stepping over the given code position */ 361 unsigned long singlestep_rip; 362 363 /* fields used by HYPER-V emulation */ 364 u64 hv_vapic; 365 366 cpumask_var_t wbinvd_dirty_mask; 367 }; 368 369 struct kvm_arch { 370 unsigned int n_free_mmu_pages; 371 unsigned int n_requested_mmu_pages; 372 unsigned int n_alloc_mmu_pages; 373 atomic_t invlpg_counter; 374 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES]; 375 /* 376 * Hash table of struct kvm_mmu_page. 377 */ 378 struct list_head active_mmu_pages; 379 struct list_head assigned_dev_head; 380 struct iommu_domain *iommu_domain; 381 int iommu_flags; 382 struct kvm_pic *vpic; 383 struct kvm_ioapic *vioapic; 384 struct kvm_pit *vpit; 385 int vapics_in_nmi_mode; 386 387 unsigned int tss_addr; 388 struct page *apic_access_page; 389 390 gpa_t wall_clock; 391 392 struct page *ept_identity_pagetable; 393 bool ept_identity_pagetable_done; 394 gpa_t ept_identity_map_addr; 395 396 unsigned long irq_sources_bitmap; 397 u64 vm_init_tsc; 398 s64 kvmclock_offset; 399 400 struct kvm_xen_hvm_config xen_hvm_config; 401 402 /* fields used by HYPER-V emulation */ 403 u64 hv_guest_os_id; 404 u64 hv_hypercall; 405 }; 406 407 struct kvm_vm_stat { 408 u32 mmu_shadow_zapped; 409 u32 mmu_pte_write; 410 u32 mmu_pte_updated; 411 u32 mmu_pde_zapped; 412 u32 mmu_flooded; 413 u32 mmu_recycled; 414 u32 mmu_cache_miss; 415 u32 mmu_unsync; 416 u32 remote_tlb_flush; 417 u32 lpages; 418 }; 419 420 struct kvm_vcpu_stat { 421 u32 pf_fixed; 422 u32 pf_guest; 423 u32 tlb_flush; 424 u32 invlpg; 425 426 u32 exits; 427 u32 io_exits; 428 u32 mmio_exits; 429 u32 signal_exits; 430 u32 irq_window_exits; 431 u32 nmi_window_exits; 432 u32 halt_exits; 433 u32 halt_wakeup; 434 u32 request_irq_exits; 435 u32 irq_exits; 436 u32 host_state_reload; 437 u32 efer_reload; 438 u32 fpu_reload; 439 u32 insn_emulation; 440 u32 insn_emulation_fail; 441 u32 hypercalls; 442 u32 irq_injections; 443 u32 nmi_injections; 444 }; 445 446 struct kvm_x86_ops { 447 int (*cpu_has_kvm_support)(void); /* __init */ 448 int (*disabled_by_bios)(void); /* __init */ 449 int (*hardware_enable)(void *dummy); 450 void (*hardware_disable)(void *dummy); 451 void (*check_processor_compatibility)(void *rtn); 452 int (*hardware_setup)(void); /* __init */ 453 void (*hardware_unsetup)(void); /* __exit */ 454 bool (*cpu_has_accelerated_tpr)(void); 455 void (*cpuid_update)(struct kvm_vcpu *vcpu); 456 457 /* Create, but do not attach this VCPU */ 458 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id); 459 void (*vcpu_free)(struct kvm_vcpu *vcpu); 460 int (*vcpu_reset)(struct kvm_vcpu *vcpu); 461 462 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu); 463 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu); 464 void (*vcpu_put)(struct kvm_vcpu *vcpu); 465 466 void (*set_guest_debug)(struct kvm_vcpu *vcpu, 467 struct kvm_guest_debug *dbg); 468 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata); 469 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 470 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg); 471 void (*get_segment)(struct kvm_vcpu *vcpu, 472 struct kvm_segment *var, int seg); 473 int (*get_cpl)(struct kvm_vcpu *vcpu); 474 void (*set_segment)(struct kvm_vcpu *vcpu, 475 struct kvm_segment *var, int seg); 476 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l); 477 void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu); 478 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu); 479 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0); 480 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); 481 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4); 482 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer); 483 void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 484 void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 485 void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 486 void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt); 487 void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value); 488 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg); 489 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu); 490 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags); 491 void (*fpu_activate)(struct kvm_vcpu *vcpu); 492 void (*fpu_deactivate)(struct kvm_vcpu *vcpu); 493 494 void (*tlb_flush)(struct kvm_vcpu *vcpu); 495 496 void (*run)(struct kvm_vcpu *vcpu); 497 int (*handle_exit)(struct kvm_vcpu *vcpu); 498 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu); 499 void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 500 u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask); 501 void (*patch_hypercall)(struct kvm_vcpu *vcpu, 502 unsigned char *hypercall_addr); 503 void (*set_irq)(struct kvm_vcpu *vcpu); 504 void (*set_nmi)(struct kvm_vcpu *vcpu); 505 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr, 506 bool has_error_code, u32 error_code, 507 bool reinject); 508 int (*interrupt_allowed)(struct kvm_vcpu *vcpu); 509 int (*nmi_allowed)(struct kvm_vcpu *vcpu); 510 bool (*get_nmi_mask)(struct kvm_vcpu *vcpu); 511 void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked); 512 void (*enable_nmi_window)(struct kvm_vcpu *vcpu); 513 void (*enable_irq_window)(struct kvm_vcpu *vcpu); 514 void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr); 515 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr); 516 int (*get_tdp_level)(void); 517 u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio); 518 int (*get_lpage_level)(void); 519 bool (*rdtscp_supported)(void); 520 521 void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry); 522 523 bool (*has_wbinvd_exit)(void); 524 525 const struct trace_print_flags *exit_reasons_str; 526 }; 527 528 extern struct kvm_x86_ops *kvm_x86_ops; 529 530 int kvm_mmu_module_init(void); 531 void kvm_mmu_module_exit(void); 532 533 void kvm_mmu_destroy(struct kvm_vcpu *vcpu); 534 int kvm_mmu_create(struct kvm_vcpu *vcpu); 535 int kvm_mmu_setup(struct kvm_vcpu *vcpu); 536 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte); 537 void kvm_mmu_set_base_ptes(u64 base_pte); 538 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask, 539 u64 dirty_mask, u64 nx_mask, u64 x_mask); 540 541 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu); 542 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot); 543 void kvm_mmu_zap_all(struct kvm *kvm); 544 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm); 545 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages); 546 547 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3); 548 549 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, 550 const void *val, int bytes); 551 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes, 552 gpa_t addr, unsigned long *ret); 553 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn); 554 555 extern bool tdp_enabled; 556 557 enum emulation_result { 558 EMULATE_DONE, /* no further processing */ 559 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */ 560 EMULATE_FAIL, /* can't emulate this instruction */ 561 }; 562 563 #define EMULTYPE_NO_DECODE (1 << 0) 564 #define EMULTYPE_TRAP_UD (1 << 1) 565 #define EMULTYPE_SKIP (1 << 2) 566 int emulate_instruction(struct kvm_vcpu *vcpu, 567 unsigned long cr2, u16 error_code, int emulation_type); 568 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address); 569 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address); 570 571 void kvm_enable_efer_bits(u64); 572 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data); 573 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 574 575 struct x86_emulate_ctxt; 576 577 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port); 578 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu); 579 int kvm_emulate_halt(struct kvm_vcpu *vcpu); 580 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address); 581 int emulate_clts(struct kvm_vcpu *vcpu); 582 int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu); 583 584 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); 585 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg); 586 587 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason, 588 bool has_error_code, u32 error_code); 589 590 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0); 591 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3); 592 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); 593 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8); 594 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val); 595 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val); 596 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu); 597 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw); 598 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l); 599 int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr); 600 601 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata); 602 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data); 603 604 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu); 605 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); 606 607 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr); 608 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 609 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr); 610 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); 611 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2, 612 u32 error_code); 613 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl); 614 615 int kvm_pic_set_irq(void *opaque, int irq, int level); 616 617 void kvm_inject_nmi(struct kvm_vcpu *vcpu); 618 619 int fx_init(struct kvm_vcpu *vcpu); 620 621 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu); 622 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, 623 const u8 *new, int bytes, 624 bool guest_initiated); 625 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva); 626 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu); 627 int kvm_mmu_load(struct kvm_vcpu *vcpu); 628 void kvm_mmu_unload(struct kvm_vcpu *vcpu); 629 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu); 630 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error); 631 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error); 632 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error); 633 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error); 634 635 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu); 636 637 int kvm_fix_hypercall(struct kvm_vcpu *vcpu); 638 639 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code); 640 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva); 641 642 void kvm_enable_tdp(void); 643 void kvm_disable_tdp(void); 644 645 int complete_pio(struct kvm_vcpu *vcpu); 646 bool kvm_check_iopl(struct kvm_vcpu *vcpu); 647 648 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page) 649 { 650 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT); 651 652 return (struct kvm_mmu_page *)page_private(page); 653 } 654 655 static inline u16 kvm_read_fs(void) 656 { 657 u16 seg; 658 asm("mov %%fs, %0" : "=g"(seg)); 659 return seg; 660 } 661 662 static inline u16 kvm_read_gs(void) 663 { 664 u16 seg; 665 asm("mov %%gs, %0" : "=g"(seg)); 666 return seg; 667 } 668 669 static inline u16 kvm_read_ldt(void) 670 { 671 u16 ldt; 672 asm("sldt %0" : "=g"(ldt)); 673 return ldt; 674 } 675 676 static inline void kvm_load_fs(u16 sel) 677 { 678 asm("mov %0, %%fs" : : "rm"(sel)); 679 } 680 681 static inline void kvm_load_gs(u16 sel) 682 { 683 asm("mov %0, %%gs" : : "rm"(sel)); 684 } 685 686 static inline void kvm_load_ldt(u16 sel) 687 { 688 asm("lldt %0" : : "rm"(sel)); 689 } 690 691 #ifdef CONFIG_X86_64 692 static inline unsigned long read_msr(unsigned long msr) 693 { 694 u64 value; 695 696 rdmsrl(msr, value); 697 return value; 698 } 699 #endif 700 701 static inline u32 get_rdx_init_val(void) 702 { 703 return 0x600; /* P6 family */ 704 } 705 706 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code) 707 { 708 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code); 709 } 710 711 #define TSS_IOPB_BASE_OFFSET 0x66 712 #define TSS_BASE_SIZE 0x68 713 #define TSS_IOPB_SIZE (65536 / 8) 714 #define TSS_REDIRECTION_SIZE (256 / 8) 715 #define RMODE_TSS_SIZE \ 716 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1) 717 718 enum { 719 TASK_SWITCH_CALL = 0, 720 TASK_SWITCH_IRET = 1, 721 TASK_SWITCH_JMP = 2, 722 TASK_SWITCH_GATE = 3, 723 }; 724 725 #define HF_GIF_MASK (1 << 0) 726 #define HF_HIF_MASK (1 << 1) 727 #define HF_VINTR_MASK (1 << 2) 728 #define HF_NMI_MASK (1 << 3) 729 #define HF_IRET_MASK (1 << 4) 730 731 /* 732 * Hardware virtualization extension instructions may fault if a 733 * reboot turns off virtualization while processes are running. 734 * Trap the fault and ignore the instruction if that happens. 735 */ 736 asmlinkage void kvm_handle_fault_on_reboot(void); 737 738 #define __kvm_handle_fault_on_reboot(insn) \ 739 "666: " insn "\n\t" \ 740 ".pushsection .fixup, \"ax\" \n" \ 741 "667: \n\t" \ 742 __ASM_SIZE(push) " $666b \n\t" \ 743 "jmp kvm_handle_fault_on_reboot \n\t" \ 744 ".popsection \n\t" \ 745 ".pushsection __ex_table, \"a\" \n\t" \ 746 _ASM_PTR " 666b, 667b \n\t" \ 747 ".popsection" 748 749 #define KVM_ARCH_WANT_MMU_NOTIFIER 750 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 751 int kvm_age_hva(struct kvm *kvm, unsigned long hva); 752 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 753 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu); 754 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu); 755 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu); 756 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 757 758 void kvm_define_shared_msr(unsigned index, u32 msr); 759 void kvm_set_shared_msr(unsigned index, u64 val, u64 mask); 760 761 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip); 762 763 #endif /* _ASM_X86_KVM_HOST_H */ 764