1 #ifndef __KVM_HOST_H 2 #define __KVM_HOST_H 3 4 /* 5 * This work is licensed under the terms of the GNU GPL, version 2. See 6 * the COPYING file in the top-level directory. 7 */ 8 9 #include <linux/types.h> 10 #include <linux/hardirq.h> 11 #include <linux/list.h> 12 #include <linux/mutex.h> 13 #include <linux/spinlock.h> 14 #include <linux/signal.h> 15 #include <linux/sched.h> 16 #include <linux/bug.h> 17 #include <linux/mm.h> 18 #include <linux/mmu_notifier.h> 19 #include <linux/preempt.h> 20 #include <linux/msi.h> 21 #include <linux/slab.h> 22 #include <linux/rcupdate.h> 23 #include <linux/ratelimit.h> 24 #include <linux/err.h> 25 #include <linux/irqflags.h> 26 #include <asm/signal.h> 27 28 #include <linux/kvm.h> 29 #include <linux/kvm_para.h> 30 31 #include <linux/kvm_types.h> 32 33 #include <asm/kvm_host.h> 34 35 #ifndef KVM_MMIO_SIZE 36 #define KVM_MMIO_SIZE 8 37 #endif 38 39 /* 40 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used 41 * in kvm, other bits are visible for userspace which are defined in 42 * include/linux/kvm_h. 43 */ 44 #define KVM_MEMSLOT_INVALID (1UL << 16) 45 46 /* Two fragments for cross MMIO pages. */ 47 #define KVM_MAX_MMIO_FRAGMENTS 2 48 49 /* 50 * For the normal pfn, the highest 12 bits should be zero, 51 * so we can mask bit 62 ~ bit 52 to indicate the error pfn, 52 * mask bit 63 to indicate the noslot pfn. 53 */ 54 #define KVM_PFN_ERR_MASK (0x7ffULL << 52) 55 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52) 56 #define KVM_PFN_NOSLOT (0x1ULL << 63) 57 58 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK) 59 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1) 60 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2) 61 62 /* 63 * error pfns indicate that the gfn is in slot but faild to 64 * translate it to pfn on host. 65 */ 66 static inline bool is_error_pfn(pfn_t pfn) 67 { 68 return !!(pfn & KVM_PFN_ERR_MASK); 69 } 70 71 /* 72 * error_noslot pfns indicate that the gfn can not be 73 * translated to pfn - it is not in slot or failed to 74 * translate it to pfn. 75 */ 76 static inline bool is_error_noslot_pfn(pfn_t pfn) 77 { 78 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK); 79 } 80 81 /* noslot pfn indicates that the gfn is not in slot. */ 82 static inline bool is_noslot_pfn(pfn_t pfn) 83 { 84 return pfn == KVM_PFN_NOSLOT; 85 } 86 87 #define KVM_HVA_ERR_BAD (PAGE_OFFSET) 88 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE) 89 90 static inline bool kvm_is_error_hva(unsigned long addr) 91 { 92 return addr >= PAGE_OFFSET; 93 } 94 95 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT)) 96 97 static inline bool is_error_page(struct page *page) 98 { 99 return IS_ERR(page); 100 } 101 102 /* 103 * vcpu->requests bit members 104 */ 105 #define KVM_REQ_TLB_FLUSH 0 106 #define KVM_REQ_MIGRATE_TIMER 1 107 #define KVM_REQ_REPORT_TPR_ACCESS 2 108 #define KVM_REQ_MMU_RELOAD 3 109 #define KVM_REQ_TRIPLE_FAULT 4 110 #define KVM_REQ_PENDING_TIMER 5 111 #define KVM_REQ_UNHALT 6 112 #define KVM_REQ_MMU_SYNC 7 113 #define KVM_REQ_CLOCK_UPDATE 8 114 #define KVM_REQ_KICK 9 115 #define KVM_REQ_DEACTIVATE_FPU 10 116 #define KVM_REQ_EVENT 11 117 #define KVM_REQ_APF_HALT 12 118 #define KVM_REQ_STEAL_UPDATE 13 119 #define KVM_REQ_NMI 14 120 #define KVM_REQ_IMMEDIATE_EXIT 15 121 #define KVM_REQ_PMU 16 122 #define KVM_REQ_PMI 17 123 #define KVM_REQ_WATCHDOG 18 124 #define KVM_REQ_MASTERCLOCK_UPDATE 19 125 #define KVM_REQ_MCLOCK_INPROGRESS 20 126 #define KVM_REQ_EPR_EXIT 21 127 #define KVM_REQ_EOIBITMAP 22 128 129 #define KVM_USERSPACE_IRQ_SOURCE_ID 0 130 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1 131 132 struct kvm; 133 struct kvm_vcpu; 134 extern struct kmem_cache *kvm_vcpu_cache; 135 136 struct kvm_io_range { 137 gpa_t addr; 138 int len; 139 struct kvm_io_device *dev; 140 }; 141 142 #define NR_IOBUS_DEVS 1000 143 144 struct kvm_io_bus { 145 int dev_count; 146 struct kvm_io_range range[]; 147 }; 148 149 enum kvm_bus { 150 KVM_MMIO_BUS, 151 KVM_PIO_BUS, 152 KVM_NR_BUSES 153 }; 154 155 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, 156 int len, const void *val); 157 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len, 158 void *val); 159 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, 160 int len, struct kvm_io_device *dev); 161 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx, 162 struct kvm_io_device *dev); 163 164 #ifdef CONFIG_KVM_ASYNC_PF 165 struct kvm_async_pf { 166 struct work_struct work; 167 struct list_head link; 168 struct list_head queue; 169 struct kvm_vcpu *vcpu; 170 struct mm_struct *mm; 171 gva_t gva; 172 unsigned long addr; 173 struct kvm_arch_async_pf arch; 174 struct page *page; 175 bool done; 176 }; 177 178 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu); 179 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu); 180 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn, 181 struct kvm_arch_async_pf *arch); 182 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu); 183 #endif 184 185 enum { 186 OUTSIDE_GUEST_MODE, 187 IN_GUEST_MODE, 188 EXITING_GUEST_MODE, 189 READING_SHADOW_PAGE_TABLES, 190 }; 191 192 /* 193 * Sometimes a large or cross-page mmio needs to be broken up into separate 194 * exits for userspace servicing. 195 */ 196 struct kvm_mmio_fragment { 197 gpa_t gpa; 198 void *data; 199 unsigned len; 200 }; 201 202 struct kvm_vcpu { 203 struct kvm *kvm; 204 #ifdef CONFIG_PREEMPT_NOTIFIERS 205 struct preempt_notifier preempt_notifier; 206 #endif 207 int cpu; 208 int vcpu_id; 209 int srcu_idx; 210 int mode; 211 unsigned long requests; 212 unsigned long guest_debug; 213 214 struct mutex mutex; 215 struct kvm_run *run; 216 217 int fpu_active; 218 int guest_fpu_loaded, guest_xcr0_loaded; 219 wait_queue_head_t wq; 220 struct pid *pid; 221 int sigset_active; 222 sigset_t sigset; 223 struct kvm_vcpu_stat stat; 224 225 #ifdef CONFIG_HAS_IOMEM 226 int mmio_needed; 227 int mmio_read_completed; 228 int mmio_is_write; 229 int mmio_cur_fragment; 230 int mmio_nr_fragments; 231 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS]; 232 #endif 233 234 #ifdef CONFIG_KVM_ASYNC_PF 235 struct { 236 u32 queued; 237 struct list_head queue; 238 struct list_head done; 239 spinlock_t lock; 240 } async_pf; 241 #endif 242 243 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT 244 /* 245 * Cpu relax intercept or pause loop exit optimization 246 * in_spin_loop: set when a vcpu does a pause loop exit 247 * or cpu relax intercepted. 248 * dy_eligible: indicates whether vcpu is eligible for directed yield. 249 */ 250 struct { 251 bool in_spin_loop; 252 bool dy_eligible; 253 } spin_loop; 254 #endif 255 struct kvm_vcpu_arch arch; 256 }; 257 258 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu) 259 { 260 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE); 261 } 262 263 /* 264 * Some of the bitops functions do not support too long bitmaps. 265 * This number must be determined not to exceed such limits. 266 */ 267 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1) 268 269 struct kvm_memory_slot { 270 gfn_t base_gfn; 271 unsigned long npages; 272 unsigned long *dirty_bitmap; 273 struct kvm_arch_memory_slot arch; 274 unsigned long userspace_addr; 275 u32 flags; 276 short id; 277 }; 278 279 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot) 280 { 281 return ALIGN(memslot->npages, BITS_PER_LONG) / 8; 282 } 283 284 struct kvm_kernel_irq_routing_entry { 285 u32 gsi; 286 u32 type; 287 int (*set)(struct kvm_kernel_irq_routing_entry *e, 288 struct kvm *kvm, int irq_source_id, int level); 289 union { 290 struct { 291 unsigned irqchip; 292 unsigned pin; 293 } irqchip; 294 struct msi_msg msi; 295 }; 296 struct hlist_node link; 297 }; 298 299 #ifdef __KVM_HAVE_IOAPIC 300 301 struct kvm_irq_routing_table { 302 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS]; 303 struct kvm_kernel_irq_routing_entry *rt_entries; 304 u32 nr_rt_entries; 305 /* 306 * Array indexed by gsi. Each entry contains list of irq chips 307 * the gsi is connected to. 308 */ 309 struct hlist_head map[0]; 310 }; 311 312 #else 313 314 struct kvm_irq_routing_table {}; 315 316 #endif 317 318 #ifndef KVM_PRIVATE_MEM_SLOTS 319 #define KVM_PRIVATE_MEM_SLOTS 0 320 #endif 321 322 #ifndef KVM_MEM_SLOTS_NUM 323 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS) 324 #endif 325 326 /* 327 * Note: 328 * memslots are not sorted by id anymore, please use id_to_memslot() 329 * to get the memslot by its id. 330 */ 331 struct kvm_memslots { 332 u64 generation; 333 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM]; 334 /* The mapping table from slot id to the index in memslots[]. */ 335 short id_to_index[KVM_MEM_SLOTS_NUM]; 336 }; 337 338 struct kvm { 339 spinlock_t mmu_lock; 340 struct mutex slots_lock; 341 struct mm_struct *mm; /* userspace tied to this vm */ 342 struct kvm_memslots *memslots; 343 struct srcu_struct srcu; 344 #ifdef CONFIG_KVM_APIC_ARCHITECTURE 345 u32 bsp_vcpu_id; 346 #endif 347 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; 348 atomic_t online_vcpus; 349 int last_boosted_vcpu; 350 struct list_head vm_list; 351 struct mutex lock; 352 struct kvm_io_bus *buses[KVM_NR_BUSES]; 353 #ifdef CONFIG_HAVE_KVM_EVENTFD 354 struct { 355 spinlock_t lock; 356 struct list_head items; 357 struct list_head resampler_list; 358 struct mutex resampler_lock; 359 } irqfds; 360 struct list_head ioeventfds; 361 #endif 362 struct kvm_vm_stat stat; 363 struct kvm_arch arch; 364 atomic_t users_count; 365 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET 366 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; 367 spinlock_t ring_lock; 368 struct list_head coalesced_zones; 369 #endif 370 371 struct mutex irq_lock; 372 #ifdef CONFIG_HAVE_KVM_IRQCHIP 373 /* 374 * Update side is protected by irq_lock and, 375 * if configured, irqfds.lock. 376 */ 377 struct kvm_irq_routing_table __rcu *irq_routing; 378 struct hlist_head mask_notifier_list; 379 struct hlist_head irq_ack_notifier_list; 380 #endif 381 382 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) 383 struct mmu_notifier mmu_notifier; 384 unsigned long mmu_notifier_seq; 385 long mmu_notifier_count; 386 #endif 387 long tlbs_dirty; 388 }; 389 390 #define kvm_err(fmt, ...) \ 391 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) 392 #define kvm_info(fmt, ...) \ 393 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) 394 #define kvm_debug(fmt, ...) \ 395 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) 396 #define kvm_pr_unimpl(fmt, ...) \ 397 pr_err_ratelimited("kvm [%i]: " fmt, \ 398 task_tgid_nr(current), ## __VA_ARGS__) 399 400 /* The guest did something we don't support. */ 401 #define vcpu_unimpl(vcpu, fmt, ...) \ 402 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__) 403 404 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i) 405 { 406 smp_rmb(); 407 return kvm->vcpus[i]; 408 } 409 410 #define kvm_for_each_vcpu(idx, vcpup, kvm) \ 411 for (idx = 0; \ 412 idx < atomic_read(&kvm->online_vcpus) && \ 413 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \ 414 idx++) 415 416 #define kvm_for_each_memslot(memslot, slots) \ 417 for (memslot = &slots->memslots[0]; \ 418 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\ 419 memslot++) 420 421 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); 422 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); 423 424 int __must_check vcpu_load(struct kvm_vcpu *vcpu); 425 void vcpu_put(struct kvm_vcpu *vcpu); 426 427 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, 428 struct module *module); 429 void kvm_exit(void); 430 431 void kvm_get_kvm(struct kvm *kvm); 432 void kvm_put_kvm(struct kvm *kvm); 433 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new, 434 u64 last_generation); 435 436 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm) 437 { 438 return rcu_dereference_check(kvm->memslots, 439 srcu_read_lock_held(&kvm->srcu) 440 || lockdep_is_held(&kvm->slots_lock)); 441 } 442 443 static inline struct kvm_memory_slot * 444 id_to_memslot(struct kvm_memslots *slots, int id) 445 { 446 int index = slots->id_to_index[id]; 447 struct kvm_memory_slot *slot; 448 449 slot = &slots->memslots[index]; 450 451 WARN_ON(slot->id != id); 452 return slot; 453 } 454 455 int kvm_set_memory_region(struct kvm *kvm, 456 struct kvm_userspace_memory_region *mem, 457 bool user_alloc); 458 int __kvm_set_memory_region(struct kvm *kvm, 459 struct kvm_userspace_memory_region *mem, 460 bool user_alloc); 461 void kvm_arch_free_memslot(struct kvm_memory_slot *free, 462 struct kvm_memory_slot *dont); 463 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages); 464 int kvm_arch_prepare_memory_region(struct kvm *kvm, 465 struct kvm_memory_slot *memslot, 466 struct kvm_memory_slot old, 467 struct kvm_userspace_memory_region *mem, 468 bool user_alloc); 469 void kvm_arch_commit_memory_region(struct kvm *kvm, 470 struct kvm_userspace_memory_region *mem, 471 struct kvm_memory_slot old, 472 bool user_alloc); 473 bool kvm_largepages_enabled(void); 474 void kvm_disable_largepages(void); 475 /* flush all memory translations */ 476 void kvm_arch_flush_shadow_all(struct kvm *kvm); 477 /* flush memory translations pointing to 'slot' */ 478 void kvm_arch_flush_shadow_memslot(struct kvm *kvm, 479 struct kvm_memory_slot *slot); 480 481 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages, 482 int nr_pages); 483 484 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); 485 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); 486 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn); 487 void kvm_release_page_clean(struct page *page); 488 void kvm_release_page_dirty(struct page *page); 489 void kvm_set_page_dirty(struct page *page); 490 void kvm_set_page_accessed(struct page *page); 491 492 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn); 493 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async, 494 bool write_fault, bool *writable); 495 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); 496 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault, 497 bool *writable); 498 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn); 499 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn); 500 501 void kvm_release_pfn_dirty(pfn_t pfn); 502 void kvm_release_pfn_clean(pfn_t pfn); 503 void kvm_set_pfn_dirty(pfn_t pfn); 504 void kvm_set_pfn_accessed(pfn_t pfn); 505 void kvm_get_pfn(pfn_t pfn); 506 507 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, 508 int len); 509 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, 510 unsigned long len); 511 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); 512 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 513 void *data, unsigned long len); 514 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, 515 int offset, int len); 516 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, 517 unsigned long len); 518 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 519 void *data, unsigned long len); 520 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 521 gpa_t gpa); 522 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); 523 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); 524 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); 525 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); 526 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn); 527 void mark_page_dirty(struct kvm *kvm, gfn_t gfn); 528 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot, 529 gfn_t gfn); 530 531 void kvm_vcpu_block(struct kvm_vcpu *vcpu); 532 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 533 bool kvm_vcpu_yield_to(struct kvm_vcpu *target); 534 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu); 535 void kvm_resched(struct kvm_vcpu *vcpu); 536 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); 537 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); 538 539 void kvm_flush_remote_tlbs(struct kvm *kvm); 540 void kvm_reload_remote_mmus(struct kvm *kvm); 541 void kvm_make_mclock_inprogress_request(struct kvm *kvm); 542 void kvm_make_update_eoibitmap_request(struct kvm *kvm); 543 544 long kvm_arch_dev_ioctl(struct file *filp, 545 unsigned int ioctl, unsigned long arg); 546 long kvm_arch_vcpu_ioctl(struct file *filp, 547 unsigned int ioctl, unsigned long arg); 548 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf); 549 550 int kvm_dev_ioctl_check_extension(long ext); 551 552 int kvm_get_dirty_log(struct kvm *kvm, 553 struct kvm_dirty_log *log, int *is_dirty); 554 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, 555 struct kvm_dirty_log *log); 556 557 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, 558 struct 559 kvm_userspace_memory_region *mem, 560 bool user_alloc); 561 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level); 562 long kvm_arch_vm_ioctl(struct file *filp, 563 unsigned int ioctl, unsigned long arg); 564 565 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 566 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 567 568 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 569 struct kvm_translation *tr); 570 571 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 572 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 573 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 574 struct kvm_sregs *sregs); 575 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 576 struct kvm_sregs *sregs); 577 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 578 struct kvm_mp_state *mp_state); 579 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 580 struct kvm_mp_state *mp_state); 581 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, 582 struct kvm_guest_debug *dbg); 583 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); 584 585 int kvm_arch_init(void *opaque); 586 void kvm_arch_exit(void); 587 588 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); 589 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); 590 591 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); 592 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 593 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 594 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); 595 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); 596 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu); 597 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); 598 599 int kvm_arch_hardware_enable(void *garbage); 600 void kvm_arch_hardware_disable(void *garbage); 601 int kvm_arch_hardware_setup(void); 602 void kvm_arch_hardware_unsetup(void); 603 void kvm_arch_check_processor_compat(void *rtn); 604 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); 605 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu); 606 607 void kvm_free_physmem(struct kvm *kvm); 608 609 void *kvm_kvzalloc(unsigned long size); 610 void kvm_kvfree(const void *addr); 611 612 #ifndef __KVM_HAVE_ARCH_VM_ALLOC 613 static inline struct kvm *kvm_arch_alloc_vm(void) 614 { 615 return kzalloc(sizeof(struct kvm), GFP_KERNEL); 616 } 617 618 static inline void kvm_arch_free_vm(struct kvm *kvm) 619 { 620 kfree(kvm); 621 } 622 #endif 623 624 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu) 625 { 626 #ifdef __KVM_HAVE_ARCH_WQP 627 return vcpu->arch.wqp; 628 #else 629 return &vcpu->wq; 630 #endif 631 } 632 633 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type); 634 void kvm_arch_destroy_vm(struct kvm *kvm); 635 void kvm_free_all_assigned_devices(struct kvm *kvm); 636 void kvm_arch_sync_events(struct kvm *kvm); 637 638 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); 639 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 640 641 bool kvm_is_mmio_pfn(pfn_t pfn); 642 643 struct kvm_irq_ack_notifier { 644 struct hlist_node link; 645 unsigned gsi; 646 void (*irq_acked)(struct kvm_irq_ack_notifier *kian); 647 }; 648 649 struct kvm_assigned_dev_kernel { 650 struct kvm_irq_ack_notifier ack_notifier; 651 struct list_head list; 652 int assigned_dev_id; 653 int host_segnr; 654 int host_busnr; 655 int host_devfn; 656 unsigned int entries_nr; 657 int host_irq; 658 bool host_irq_disabled; 659 bool pci_2_3; 660 struct msix_entry *host_msix_entries; 661 int guest_irq; 662 struct msix_entry *guest_msix_entries; 663 unsigned long irq_requested_type; 664 int irq_source_id; 665 int flags; 666 struct pci_dev *dev; 667 struct kvm *kvm; 668 spinlock_t intx_lock; 669 spinlock_t intx_mask_lock; 670 char irq_name[32]; 671 struct pci_saved_state *pci_saved_state; 672 }; 673 674 struct kvm_irq_mask_notifier { 675 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked); 676 int irq; 677 struct hlist_node link; 678 }; 679 680 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, 681 struct kvm_irq_mask_notifier *kimn); 682 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, 683 struct kvm_irq_mask_notifier *kimn); 684 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin, 685 bool mask); 686 687 #ifdef __KVM_HAVE_IOAPIC 688 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic, 689 union kvm_ioapic_redirect_entry *entry, 690 unsigned long *deliver_bitmask); 691 #endif 692 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level); 693 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level); 694 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm, 695 int irq_source_id, int level); 696 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin); 697 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin); 698 void kvm_register_irq_ack_notifier(struct kvm *kvm, 699 struct kvm_irq_ack_notifier *kian); 700 void kvm_unregister_irq_ack_notifier(struct kvm *kvm, 701 struct kvm_irq_ack_notifier *kian); 702 int kvm_request_irq_source_id(struct kvm *kvm); 703 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id); 704 705 /* For vcpu->arch.iommu_flags */ 706 #define KVM_IOMMU_CACHE_COHERENCY 0x1 707 708 #ifdef CONFIG_IOMMU_API 709 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot); 710 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot); 711 int kvm_iommu_map_guest(struct kvm *kvm); 712 int kvm_iommu_unmap_guest(struct kvm *kvm); 713 int kvm_assign_device(struct kvm *kvm, 714 struct kvm_assigned_dev_kernel *assigned_dev); 715 int kvm_deassign_device(struct kvm *kvm, 716 struct kvm_assigned_dev_kernel *assigned_dev); 717 #else /* CONFIG_IOMMU_API */ 718 static inline int kvm_iommu_map_pages(struct kvm *kvm, 719 struct kvm_memory_slot *slot) 720 { 721 return 0; 722 } 723 724 static inline void kvm_iommu_unmap_pages(struct kvm *kvm, 725 struct kvm_memory_slot *slot) 726 { 727 } 728 729 static inline int kvm_iommu_map_guest(struct kvm *kvm) 730 { 731 return -ENODEV; 732 } 733 734 static inline int kvm_iommu_unmap_guest(struct kvm *kvm) 735 { 736 return 0; 737 } 738 739 static inline int kvm_assign_device(struct kvm *kvm, 740 struct kvm_assigned_dev_kernel *assigned_dev) 741 { 742 return 0; 743 } 744 745 static inline int kvm_deassign_device(struct kvm *kvm, 746 struct kvm_assigned_dev_kernel *assigned_dev) 747 { 748 return 0; 749 } 750 #endif /* CONFIG_IOMMU_API */ 751 752 static inline void __guest_enter(void) 753 { 754 /* 755 * This is running in ioctl context so we can avoid 756 * the call to vtime_account() with its unnecessary idle check. 757 */ 758 vtime_account_system(current); 759 current->flags |= PF_VCPU; 760 } 761 762 static inline void __guest_exit(void) 763 { 764 /* 765 * This is running in ioctl context so we can avoid 766 * the call to vtime_account() with its unnecessary idle check. 767 */ 768 vtime_account_system(current); 769 current->flags &= ~PF_VCPU; 770 } 771 772 #ifdef CONFIG_CONTEXT_TRACKING 773 extern void guest_enter(void); 774 extern void guest_exit(void); 775 776 #else /* !CONFIG_CONTEXT_TRACKING */ 777 static inline void guest_enter(void) 778 { 779 __guest_enter(); 780 } 781 782 static inline void guest_exit(void) 783 { 784 __guest_exit(); 785 } 786 #endif /* !CONFIG_CONTEXT_TRACKING */ 787 788 static inline void kvm_guest_enter(void) 789 { 790 unsigned long flags; 791 792 BUG_ON(preemptible()); 793 794 local_irq_save(flags); 795 guest_enter(); 796 local_irq_restore(flags); 797 798 /* KVM does not hold any references to rcu protected data when it 799 * switches CPU into a guest mode. In fact switching to a guest mode 800 * is very similar to exiting to userspase from rcu point of view. In 801 * addition CPU may stay in a guest mode for quite a long time (up to 802 * one time slice). Lets treat guest mode as quiescent state, just like 803 * we do with user-mode execution. 804 */ 805 rcu_virt_note_context_switch(smp_processor_id()); 806 } 807 808 static inline void kvm_guest_exit(void) 809 { 810 unsigned long flags; 811 812 local_irq_save(flags); 813 guest_exit(); 814 local_irq_restore(flags); 815 } 816 817 /* 818 * search_memslots() and __gfn_to_memslot() are here because they are 819 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c. 820 * gfn_to_memslot() itself isn't here as an inline because that would 821 * bloat other code too much. 822 */ 823 static inline struct kvm_memory_slot * 824 search_memslots(struct kvm_memslots *slots, gfn_t gfn) 825 { 826 struct kvm_memory_slot *memslot; 827 828 kvm_for_each_memslot(memslot, slots) 829 if (gfn >= memslot->base_gfn && 830 gfn < memslot->base_gfn + memslot->npages) 831 return memslot; 832 833 return NULL; 834 } 835 836 static inline struct kvm_memory_slot * 837 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn) 838 { 839 return search_memslots(slots, gfn); 840 } 841 842 static inline unsigned long 843 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn) 844 { 845 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE; 846 } 847 848 static inline int memslot_id(struct kvm *kvm, gfn_t gfn) 849 { 850 return gfn_to_memslot(kvm, gfn)->id; 851 } 852 853 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level) 854 { 855 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */ 856 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) - 857 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level)); 858 } 859 860 static inline gfn_t 861 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot) 862 { 863 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT; 864 865 return slot->base_gfn + gfn_offset; 866 } 867 868 static inline gpa_t gfn_to_gpa(gfn_t gfn) 869 { 870 return (gpa_t)gfn << PAGE_SHIFT; 871 } 872 873 static inline gfn_t gpa_to_gfn(gpa_t gpa) 874 { 875 return (gfn_t)(gpa >> PAGE_SHIFT); 876 } 877 878 static inline hpa_t pfn_to_hpa(pfn_t pfn) 879 { 880 return (hpa_t)pfn << PAGE_SHIFT; 881 } 882 883 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) 884 { 885 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); 886 } 887 888 enum kvm_stat_kind { 889 KVM_STAT_VM, 890 KVM_STAT_VCPU, 891 }; 892 893 struct kvm_stats_debugfs_item { 894 const char *name; 895 int offset; 896 enum kvm_stat_kind kind; 897 struct dentry *dentry; 898 }; 899 extern struct kvm_stats_debugfs_item debugfs_entries[]; 900 extern struct dentry *kvm_debugfs_dir; 901 902 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) 903 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq) 904 { 905 if (unlikely(kvm->mmu_notifier_count)) 906 return 1; 907 /* 908 * Ensure the read of mmu_notifier_count happens before the read 909 * of mmu_notifier_seq. This interacts with the smp_wmb() in 910 * mmu_notifier_invalidate_range_end to make sure that the caller 911 * either sees the old (non-zero) value of mmu_notifier_count or 912 * the new (incremented) value of mmu_notifier_seq. 913 * PowerPC Book3s HV KVM calls this under a per-page lock 914 * rather than under kvm->mmu_lock, for scalability, so 915 * can't rely on kvm->mmu_lock to keep things ordered. 916 */ 917 smp_rmb(); 918 if (kvm->mmu_notifier_seq != mmu_seq) 919 return 1; 920 return 0; 921 } 922 #endif 923 924 #ifdef KVM_CAP_IRQ_ROUTING 925 926 #define KVM_MAX_IRQ_ROUTES 1024 927 928 int kvm_setup_default_irq_routing(struct kvm *kvm); 929 int kvm_set_irq_routing(struct kvm *kvm, 930 const struct kvm_irq_routing_entry *entries, 931 unsigned nr, 932 unsigned flags); 933 void kvm_free_irq_routing(struct kvm *kvm); 934 935 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi); 936 937 #else 938 939 static inline void kvm_free_irq_routing(struct kvm *kvm) {} 940 941 #endif 942 943 #ifdef CONFIG_HAVE_KVM_EVENTFD 944 945 void kvm_eventfd_init(struct kvm *kvm); 946 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args); 947 948 #ifdef CONFIG_HAVE_KVM_IRQCHIP 949 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args); 950 void kvm_irqfd_release(struct kvm *kvm); 951 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *); 952 #else 953 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args) 954 { 955 return -EINVAL; 956 } 957 958 static inline void kvm_irqfd_release(struct kvm *kvm) {} 959 #endif 960 961 #else 962 963 static inline void kvm_eventfd_init(struct kvm *kvm) {} 964 965 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args) 966 { 967 return -EINVAL; 968 } 969 970 static inline void kvm_irqfd_release(struct kvm *kvm) {} 971 972 #ifdef CONFIG_HAVE_KVM_IRQCHIP 973 static inline void kvm_irq_routing_update(struct kvm *kvm, 974 struct kvm_irq_routing_table *irq_rt) 975 { 976 rcu_assign_pointer(kvm->irq_routing, irq_rt); 977 } 978 #endif 979 980 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) 981 { 982 return -ENOSYS; 983 } 984 985 #endif /* CONFIG_HAVE_KVM_EVENTFD */ 986 987 #ifdef CONFIG_KVM_APIC_ARCHITECTURE 988 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) 989 { 990 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id; 991 } 992 993 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu); 994 995 #else 996 997 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; } 998 999 #endif 1000 1001 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT 1002 1003 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, 1004 unsigned long arg); 1005 1006 #else 1007 1008 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, 1009 unsigned long arg) 1010 { 1011 return -ENOTTY; 1012 } 1013 1014 #endif 1015 1016 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu) 1017 { 1018 set_bit(req, &vcpu->requests); 1019 } 1020 1021 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu) 1022 { 1023 if (test_bit(req, &vcpu->requests)) { 1024 clear_bit(req, &vcpu->requests); 1025 return true; 1026 } else { 1027 return false; 1028 } 1029 } 1030 1031 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT 1032 1033 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val) 1034 { 1035 vcpu->spin_loop.in_spin_loop = val; 1036 } 1037 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val) 1038 { 1039 vcpu->spin_loop.dy_eligible = val; 1040 } 1041 1042 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */ 1043 1044 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val) 1045 { 1046 } 1047 1048 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val) 1049 { 1050 } 1051 1052 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu) 1053 { 1054 return true; 1055 } 1056 1057 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */ 1058 #endif 1059 1060