1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __KVM_X86_VMX_H 3 #define __KVM_X86_VMX_H 4 5 #include <linux/kvm_host.h> 6 7 #include <asm/kvm.h> 8 #include <asm/intel_pt.h> 9 10 #include "capabilities.h" 11 #include "kvm_cache_regs.h" 12 #include "ops.h" 13 #include "vmcs.h" 14 #include "cpuid.h" 15 16 extern const u32 vmx_msr_index[]; 17 18 #define MSR_TYPE_R 1 19 #define MSR_TYPE_W 2 20 #define MSR_TYPE_RW 3 21 22 #define X2APIC_MSR(r) (APIC_BASE_MSR + ((r) >> 4)) 23 24 #ifdef CONFIG_X86_64 25 #define NR_SHARED_MSRS 7 26 #else 27 #define NR_SHARED_MSRS 4 28 #endif 29 30 #define NR_LOADSTORE_MSRS 8 31 32 struct vmx_msrs { 33 unsigned int nr; 34 struct vmx_msr_entry val[NR_LOADSTORE_MSRS]; 35 }; 36 37 struct shared_msr_entry { 38 unsigned index; 39 u64 data; 40 u64 mask; 41 }; 42 43 enum segment_cache_field { 44 SEG_FIELD_SEL = 0, 45 SEG_FIELD_BASE = 1, 46 SEG_FIELD_LIMIT = 2, 47 SEG_FIELD_AR = 3, 48 49 SEG_FIELD_NR = 4 50 }; 51 52 /* Posted-Interrupt Descriptor */ 53 struct pi_desc { 54 u32 pir[8]; /* Posted interrupt requested */ 55 union { 56 struct { 57 /* bit 256 - Outstanding Notification */ 58 u16 on : 1, 59 /* bit 257 - Suppress Notification */ 60 sn : 1, 61 /* bit 271:258 - Reserved */ 62 rsvd_1 : 14; 63 /* bit 279:272 - Notification Vector */ 64 u8 nv; 65 /* bit 287:280 - Reserved */ 66 u8 rsvd_2; 67 /* bit 319:288 - Notification Destination */ 68 u32 ndst; 69 }; 70 u64 control; 71 }; 72 u32 rsvd[6]; 73 } __aligned(64); 74 75 #define RTIT_ADDR_RANGE 4 76 77 struct pt_ctx { 78 u64 ctl; 79 u64 status; 80 u64 output_base; 81 u64 output_mask; 82 u64 cr3_match; 83 u64 addr_a[RTIT_ADDR_RANGE]; 84 u64 addr_b[RTIT_ADDR_RANGE]; 85 }; 86 87 struct pt_desc { 88 u64 ctl_bitmask; 89 u32 addr_range; 90 u32 caps[PT_CPUID_REGS_NUM * PT_CPUID_LEAVES]; 91 struct pt_ctx host; 92 struct pt_ctx guest; 93 }; 94 95 /* 96 * The nested_vmx structure is part of vcpu_vmx, and holds information we need 97 * for correct emulation of VMX (i.e., nested VMX) on this vcpu. 98 */ 99 struct nested_vmx { 100 /* Has the level1 guest done vmxon? */ 101 bool vmxon; 102 gpa_t vmxon_ptr; 103 bool pml_full; 104 105 /* The guest-physical address of the current VMCS L1 keeps for L2 */ 106 gpa_t current_vmptr; 107 /* 108 * Cache of the guest's VMCS, existing outside of guest memory. 109 * Loaded from guest memory during VMPTRLD. Flushed to guest 110 * memory during VMCLEAR and VMPTRLD. 111 */ 112 struct vmcs12 *cached_vmcs12; 113 /* 114 * Cache of the guest's shadow VMCS, existing outside of guest 115 * memory. Loaded from guest memory during VM entry. Flushed 116 * to guest memory during VM exit. 117 */ 118 struct vmcs12 *cached_shadow_vmcs12; 119 120 /* 121 * Indicates if the shadow vmcs or enlightened vmcs must be updated 122 * with the data held by struct vmcs12. 123 */ 124 bool need_vmcs12_to_shadow_sync; 125 bool dirty_vmcs12; 126 127 /* 128 * Indicates lazily loaded guest state has not yet been decached from 129 * vmcs02. 130 */ 131 bool need_sync_vmcs02_to_vmcs12_rare; 132 133 /* 134 * vmcs02 has been initialized, i.e. state that is constant for 135 * vmcs02 has been written to the backing VMCS. Initialization 136 * is delayed until L1 actually attempts to run a nested VM. 137 */ 138 bool vmcs02_initialized; 139 140 bool change_vmcs01_virtual_apic_mode; 141 bool reload_vmcs01_apic_access_page; 142 143 /* 144 * Enlightened VMCS has been enabled. It does not mean that L1 has to 145 * use it. However, VMX features available to L1 will be limited based 146 * on what the enlightened VMCS supports. 147 */ 148 bool enlightened_vmcs_enabled; 149 150 /* L2 must run next, and mustn't decide to exit to L1. */ 151 bool nested_run_pending; 152 153 /* Pending MTF VM-exit into L1. */ 154 bool mtf_pending; 155 156 struct loaded_vmcs vmcs02; 157 158 /* 159 * Guest pages referred to in the vmcs02 with host-physical 160 * pointers, so we must keep them pinned while L2 runs. 161 */ 162 struct page *apic_access_page; 163 struct kvm_host_map virtual_apic_map; 164 struct kvm_host_map pi_desc_map; 165 166 struct kvm_host_map msr_bitmap_map; 167 168 struct pi_desc *pi_desc; 169 bool pi_pending; 170 u16 posted_intr_nv; 171 172 struct hrtimer preemption_timer; 173 u64 preemption_timer_deadline; 174 bool has_preemption_timer_deadline; 175 bool preemption_timer_expired; 176 177 /* to migrate it to L2 if VM_ENTRY_LOAD_DEBUG_CONTROLS is off */ 178 u64 vmcs01_debugctl; 179 u64 vmcs01_guest_bndcfgs; 180 181 /* to migrate it to L1 if L2 writes to L1's CR8 directly */ 182 int l1_tpr_threshold; 183 184 u16 vpid02; 185 u16 last_vpid; 186 187 struct nested_vmx_msrs msrs; 188 189 /* SMM related state */ 190 struct { 191 /* in VMX operation on SMM entry? */ 192 bool vmxon; 193 /* in guest mode on SMM entry? */ 194 bool guest_mode; 195 } smm; 196 197 gpa_t hv_evmcs_vmptr; 198 struct kvm_host_map hv_evmcs_map; 199 struct hv_enlightened_vmcs *hv_evmcs; 200 }; 201 202 struct vcpu_vmx { 203 struct kvm_vcpu vcpu; 204 u8 fail; 205 u8 msr_bitmap_mode; 206 207 /* 208 * If true, host state has been stored in vmx->loaded_vmcs for 209 * the CPU registers that only need to be switched when transitioning 210 * to/from the kernel, and the registers have been loaded with guest 211 * values. If false, host state is loaded in the CPU registers 212 * and vmx->loaded_vmcs->host_state is invalid. 213 */ 214 bool guest_state_loaded; 215 216 unsigned long exit_qualification; 217 u32 exit_intr_info; 218 u32 idt_vectoring_info; 219 ulong rflags; 220 221 struct shared_msr_entry guest_msrs[NR_SHARED_MSRS]; 222 int nmsrs; 223 int save_nmsrs; 224 bool guest_msrs_ready; 225 #ifdef CONFIG_X86_64 226 u64 msr_host_kernel_gs_base; 227 u64 msr_guest_kernel_gs_base; 228 #endif 229 230 u64 spec_ctrl; 231 u32 msr_ia32_umwait_control; 232 233 u32 secondary_exec_control; 234 235 /* 236 * loaded_vmcs points to the VMCS currently used in this vcpu. For a 237 * non-nested (L1) guest, it always points to vmcs01. For a nested 238 * guest (L2), it points to a different VMCS. 239 */ 240 struct loaded_vmcs vmcs01; 241 struct loaded_vmcs *loaded_vmcs; 242 243 struct msr_autoload { 244 struct vmx_msrs guest; 245 struct vmx_msrs host; 246 } msr_autoload; 247 248 struct msr_autostore { 249 struct vmx_msrs guest; 250 } msr_autostore; 251 252 struct { 253 int vm86_active; 254 ulong save_rflags; 255 struct kvm_segment segs[8]; 256 } rmode; 257 struct { 258 u32 bitmask; /* 4 bits per segment (1 bit per field) */ 259 struct kvm_save_segment { 260 u16 selector; 261 unsigned long base; 262 u32 limit; 263 u32 ar; 264 } seg[8]; 265 } segment_cache; 266 int vpid; 267 bool emulation_required; 268 269 u32 exit_reason; 270 271 /* Posted interrupt descriptor */ 272 struct pi_desc pi_desc; 273 274 /* Support for a guest hypervisor (nested VMX) */ 275 struct nested_vmx nested; 276 277 /* Dynamic PLE window. */ 278 unsigned int ple_window; 279 bool ple_window_dirty; 280 281 bool req_immediate_exit; 282 283 /* Support for PML */ 284 #define PML_ENTITY_NUM 512 285 struct page *pml_pg; 286 287 /* apic deadline value in host tsc */ 288 u64 hv_deadline_tsc; 289 290 u64 current_tsc_ratio; 291 292 unsigned long host_debugctlmsr; 293 294 /* 295 * Only bits masked by msr_ia32_feature_control_valid_bits can be set in 296 * msr_ia32_feature_control. FEAT_CTL_LOCKED is always included 297 * in msr_ia32_feature_control_valid_bits. 298 */ 299 u64 msr_ia32_feature_control; 300 u64 msr_ia32_feature_control_valid_bits; 301 u64 ept_pointer; 302 303 struct pt_desc pt_desc; 304 }; 305 306 enum ept_pointers_status { 307 EPT_POINTERS_CHECK = 0, 308 EPT_POINTERS_MATCH = 1, 309 EPT_POINTERS_MISMATCH = 2 310 }; 311 312 struct kvm_vmx { 313 struct kvm kvm; 314 315 unsigned int tss_addr; 316 bool ept_identity_pagetable_done; 317 gpa_t ept_identity_map_addr; 318 319 enum ept_pointers_status ept_pointers_match; 320 spinlock_t ept_pointer_lock; 321 }; 322 323 bool nested_vmx_allowed(struct kvm_vcpu *vcpu); 324 void vmx_vcpu_load_vmcs(struct kvm_vcpu *vcpu, int cpu, 325 struct loaded_vmcs *buddy); 326 int allocate_vpid(void); 327 void free_vpid(int vpid); 328 void vmx_set_constant_host_state(struct vcpu_vmx *vmx); 329 void vmx_prepare_switch_to_guest(struct kvm_vcpu *vcpu); 330 void vmx_set_host_fs_gs(struct vmcs_host_state *host, u16 fs_sel, u16 gs_sel, 331 unsigned long fs_base, unsigned long gs_base); 332 int vmx_get_cpl(struct kvm_vcpu *vcpu); 333 unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu); 334 void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); 335 u32 vmx_get_interrupt_shadow(struct kvm_vcpu *vcpu); 336 void vmx_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask); 337 void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer); 338 void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0); 339 int vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); 340 void set_cr4_guest_host_mask(struct vcpu_vmx *vmx); 341 void ept_save_pdptrs(struct kvm_vcpu *vcpu); 342 void vmx_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); 343 void vmx_set_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg); 344 u64 construct_eptp(struct kvm_vcpu *vcpu, unsigned long root_hpa, 345 int root_level); 346 void update_exception_bitmap(struct kvm_vcpu *vcpu); 347 void vmx_update_msr_bitmap(struct kvm_vcpu *vcpu); 348 bool vmx_nmi_blocked(struct kvm_vcpu *vcpu); 349 bool vmx_interrupt_blocked(struct kvm_vcpu *vcpu); 350 bool vmx_get_nmi_mask(struct kvm_vcpu *vcpu); 351 void vmx_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked); 352 void vmx_set_virtual_apic_mode(struct kvm_vcpu *vcpu); 353 struct shared_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr); 354 void pt_update_intercept_for_msr(struct vcpu_vmx *vmx); 355 void vmx_update_host_rsp(struct vcpu_vmx *vmx, unsigned long host_rsp); 356 int vmx_find_msr_index(struct vmx_msrs *m, u32 msr); 357 int vmx_handle_memory_failure(struct kvm_vcpu *vcpu, int r, 358 struct x86_exception *e); 359 void vmx_ept_load_pdptrs(struct kvm_vcpu *vcpu); 360 361 #define POSTED_INTR_ON 0 362 #define POSTED_INTR_SN 1 363 364 static inline bool pi_test_and_set_on(struct pi_desc *pi_desc) 365 { 366 return test_and_set_bit(POSTED_INTR_ON, 367 (unsigned long *)&pi_desc->control); 368 } 369 370 static inline bool pi_test_and_clear_on(struct pi_desc *pi_desc) 371 { 372 return test_and_clear_bit(POSTED_INTR_ON, 373 (unsigned long *)&pi_desc->control); 374 } 375 376 static inline int pi_test_and_set_pir(int vector, struct pi_desc *pi_desc) 377 { 378 return test_and_set_bit(vector, (unsigned long *)pi_desc->pir); 379 } 380 381 static inline bool pi_is_pir_empty(struct pi_desc *pi_desc) 382 { 383 return bitmap_empty((unsigned long *)pi_desc->pir, NR_VECTORS); 384 } 385 386 static inline void pi_set_sn(struct pi_desc *pi_desc) 387 { 388 set_bit(POSTED_INTR_SN, 389 (unsigned long *)&pi_desc->control); 390 } 391 392 static inline void pi_set_on(struct pi_desc *pi_desc) 393 { 394 set_bit(POSTED_INTR_ON, 395 (unsigned long *)&pi_desc->control); 396 } 397 398 static inline void pi_clear_on(struct pi_desc *pi_desc) 399 { 400 clear_bit(POSTED_INTR_ON, 401 (unsigned long *)&pi_desc->control); 402 } 403 404 static inline void pi_clear_sn(struct pi_desc *pi_desc) 405 { 406 clear_bit(POSTED_INTR_SN, 407 (unsigned long *)&pi_desc->control); 408 } 409 410 static inline int pi_test_on(struct pi_desc *pi_desc) 411 { 412 return test_bit(POSTED_INTR_ON, 413 (unsigned long *)&pi_desc->control); 414 } 415 416 static inline int pi_test_sn(struct pi_desc *pi_desc) 417 { 418 return test_bit(POSTED_INTR_SN, 419 (unsigned long *)&pi_desc->control); 420 } 421 422 static inline u8 vmx_get_rvi(void) 423 { 424 return vmcs_read16(GUEST_INTR_STATUS) & 0xff; 425 } 426 427 #define BUILD_CONTROLS_SHADOW(lname, uname) \ 428 static inline void lname##_controls_set(struct vcpu_vmx *vmx, u32 val) \ 429 { \ 430 if (vmx->loaded_vmcs->controls_shadow.lname != val) { \ 431 vmcs_write32(uname, val); \ 432 vmx->loaded_vmcs->controls_shadow.lname = val; \ 433 } \ 434 } \ 435 static inline u32 lname##_controls_get(struct vcpu_vmx *vmx) \ 436 { \ 437 return vmx->loaded_vmcs->controls_shadow.lname; \ 438 } \ 439 static inline void lname##_controls_setbit(struct vcpu_vmx *vmx, u32 val) \ 440 { \ 441 lname##_controls_set(vmx, lname##_controls_get(vmx) | val); \ 442 } \ 443 static inline void lname##_controls_clearbit(struct vcpu_vmx *vmx, u32 val) \ 444 { \ 445 lname##_controls_set(vmx, lname##_controls_get(vmx) & ~val); \ 446 } 447 BUILD_CONTROLS_SHADOW(vm_entry, VM_ENTRY_CONTROLS) 448 BUILD_CONTROLS_SHADOW(vm_exit, VM_EXIT_CONTROLS) 449 BUILD_CONTROLS_SHADOW(pin, PIN_BASED_VM_EXEC_CONTROL) 450 BUILD_CONTROLS_SHADOW(exec, CPU_BASED_VM_EXEC_CONTROL) 451 BUILD_CONTROLS_SHADOW(secondary_exec, SECONDARY_VM_EXEC_CONTROL) 452 453 static inline void vmx_register_cache_reset(struct kvm_vcpu *vcpu) 454 { 455 vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP) 456 | (1 << VCPU_EXREG_RFLAGS) 457 | (1 << VCPU_EXREG_PDPTR) 458 | (1 << VCPU_EXREG_SEGMENTS) 459 | (1 << VCPU_EXREG_CR0) 460 | (1 << VCPU_EXREG_CR3) 461 | (1 << VCPU_EXREG_CR4) 462 | (1 << VCPU_EXREG_EXIT_INFO_1) 463 | (1 << VCPU_EXREG_EXIT_INFO_2)); 464 vcpu->arch.regs_dirty = 0; 465 } 466 467 static inline u32 vmx_vmentry_ctrl(void) 468 { 469 u32 vmentry_ctrl = vmcs_config.vmentry_ctrl; 470 if (vmx_pt_mode_is_system()) 471 vmentry_ctrl &= ~(VM_ENTRY_PT_CONCEAL_PIP | 472 VM_ENTRY_LOAD_IA32_RTIT_CTL); 473 /* Loading of EFER and PERF_GLOBAL_CTRL are toggled dynamically */ 474 return vmentry_ctrl & 475 ~(VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL | VM_ENTRY_LOAD_IA32_EFER); 476 } 477 478 static inline u32 vmx_vmexit_ctrl(void) 479 { 480 u32 vmexit_ctrl = vmcs_config.vmexit_ctrl; 481 if (vmx_pt_mode_is_system()) 482 vmexit_ctrl &= ~(VM_EXIT_PT_CONCEAL_PIP | 483 VM_EXIT_CLEAR_IA32_RTIT_CTL); 484 /* Loading of EFER and PERF_GLOBAL_CTRL are toggled dynamically */ 485 return vmexit_ctrl & 486 ~(VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL | VM_EXIT_LOAD_IA32_EFER); 487 } 488 489 u32 vmx_exec_control(struct vcpu_vmx *vmx); 490 u32 vmx_pin_based_exec_ctrl(struct vcpu_vmx *vmx); 491 492 static inline struct kvm_vmx *to_kvm_vmx(struct kvm *kvm) 493 { 494 return container_of(kvm, struct kvm_vmx, kvm); 495 } 496 497 static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu) 498 { 499 return container_of(vcpu, struct vcpu_vmx, vcpu); 500 } 501 502 static inline struct pi_desc *vcpu_to_pi_desc(struct kvm_vcpu *vcpu) 503 { 504 return &(to_vmx(vcpu)->pi_desc); 505 } 506 507 static inline unsigned long vmx_get_exit_qual(struct kvm_vcpu *vcpu) 508 { 509 struct vcpu_vmx *vmx = to_vmx(vcpu); 510 511 if (!kvm_register_is_available(vcpu, VCPU_EXREG_EXIT_INFO_1)) { 512 kvm_register_mark_available(vcpu, VCPU_EXREG_EXIT_INFO_1); 513 vmx->exit_qualification = vmcs_readl(EXIT_QUALIFICATION); 514 } 515 return vmx->exit_qualification; 516 } 517 518 static inline u32 vmx_get_intr_info(struct kvm_vcpu *vcpu) 519 { 520 struct vcpu_vmx *vmx = to_vmx(vcpu); 521 522 if (!kvm_register_is_available(vcpu, VCPU_EXREG_EXIT_INFO_2)) { 523 kvm_register_mark_available(vcpu, VCPU_EXREG_EXIT_INFO_2); 524 vmx->exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO); 525 } 526 return vmx->exit_intr_info; 527 } 528 529 struct vmcs *alloc_vmcs_cpu(bool shadow, int cpu, gfp_t flags); 530 void free_vmcs(struct vmcs *vmcs); 531 int alloc_loaded_vmcs(struct loaded_vmcs *loaded_vmcs); 532 void free_loaded_vmcs(struct loaded_vmcs *loaded_vmcs); 533 void loaded_vmcs_clear(struct loaded_vmcs *loaded_vmcs); 534 535 static inline struct vmcs *alloc_vmcs(bool shadow) 536 { 537 return alloc_vmcs_cpu(shadow, raw_smp_processor_id(), 538 GFP_KERNEL_ACCOUNT); 539 } 540 541 static inline void decache_tsc_multiplier(struct vcpu_vmx *vmx) 542 { 543 vmx->current_tsc_ratio = vmx->vcpu.arch.tsc_scaling_ratio; 544 vmcs_write64(TSC_MULTIPLIER, vmx->current_tsc_ratio); 545 } 546 547 static inline bool vmx_has_waitpkg(struct vcpu_vmx *vmx) 548 { 549 return vmx->secondary_exec_control & 550 SECONDARY_EXEC_ENABLE_USR_WAIT_PAUSE; 551 } 552 553 static inline bool vmx_need_pf_intercept(struct kvm_vcpu *vcpu) 554 { 555 return !enable_ept || cpuid_maxphyaddr(vcpu) < boot_cpu_data.x86_phys_bits; 556 } 557 558 void dump_vmcs(void); 559 560 #endif /* __KVM_X86_VMX_H */ 561