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 <linux/context_tracking.h> 27 #include <asm/signal.h> 28 29 #include <linux/kvm.h> 30 #include <linux/kvm_para.h> 31 32 #include <linux/kvm_types.h> 33 34 #include <asm/kvm_host.h> 35 36 #ifndef KVM_MMIO_SIZE 37 #define KVM_MMIO_SIZE 8 38 #endif 39 40 /* 41 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used 42 * in kvm, other bits are visible for userspace which are defined in 43 * include/linux/kvm_h. 44 */ 45 #define KVM_MEMSLOT_INVALID (1UL << 16) 46 47 /* Two fragments for cross MMIO pages. */ 48 #define KVM_MAX_MMIO_FRAGMENTS 2 49 50 /* 51 * For the normal pfn, the highest 12 bits should be zero, 52 * so we can mask bit 62 ~ bit 52 to indicate the error pfn, 53 * mask bit 63 to indicate the noslot pfn. 54 */ 55 #define KVM_PFN_ERR_MASK (0x7ffULL << 52) 56 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52) 57 #define KVM_PFN_NOSLOT (0x1ULL << 63) 58 59 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK) 60 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1) 61 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2) 62 63 /* 64 * error pfns indicate that the gfn is in slot but faild to 65 * translate it to pfn on host. 66 */ 67 static inline bool is_error_pfn(pfn_t pfn) 68 { 69 return !!(pfn & KVM_PFN_ERR_MASK); 70 } 71 72 /* 73 * error_noslot pfns indicate that the gfn can not be 74 * translated to pfn - it is not in slot or failed to 75 * translate it to pfn. 76 */ 77 static inline bool is_error_noslot_pfn(pfn_t pfn) 78 { 79 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK); 80 } 81 82 /* noslot pfn indicates that the gfn is not in slot. */ 83 static inline bool is_noslot_pfn(pfn_t pfn) 84 { 85 return pfn == KVM_PFN_NOSLOT; 86 } 87 88 /* 89 * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390) 90 * provide own defines and kvm_is_error_hva 91 */ 92 #ifndef KVM_HVA_ERR_BAD 93 94 #define KVM_HVA_ERR_BAD (PAGE_OFFSET) 95 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE) 96 97 static inline bool kvm_is_error_hva(unsigned long addr) 98 { 99 return addr >= PAGE_OFFSET; 100 } 101 102 #endif 103 104 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT)) 105 106 static inline bool is_error_page(struct page *page) 107 { 108 return IS_ERR(page); 109 } 110 111 /* 112 * vcpu->requests bit members 113 */ 114 #define KVM_REQ_TLB_FLUSH 0 115 #define KVM_REQ_MIGRATE_TIMER 1 116 #define KVM_REQ_REPORT_TPR_ACCESS 2 117 #define KVM_REQ_MMU_RELOAD 3 118 #define KVM_REQ_TRIPLE_FAULT 4 119 #define KVM_REQ_PENDING_TIMER 5 120 #define KVM_REQ_UNHALT 6 121 #define KVM_REQ_MMU_SYNC 7 122 #define KVM_REQ_CLOCK_UPDATE 8 123 #define KVM_REQ_KICK 9 124 #define KVM_REQ_DEACTIVATE_FPU 10 125 #define KVM_REQ_EVENT 11 126 #define KVM_REQ_APF_HALT 12 127 #define KVM_REQ_STEAL_UPDATE 13 128 #define KVM_REQ_NMI 14 129 #define KVM_REQ_PMU 15 130 #define KVM_REQ_PMI 16 131 #define KVM_REQ_WATCHDOG 17 132 #define KVM_REQ_MASTERCLOCK_UPDATE 18 133 #define KVM_REQ_MCLOCK_INPROGRESS 19 134 #define KVM_REQ_EPR_EXIT 20 135 #define KVM_REQ_SCAN_IOAPIC 21 136 #define KVM_REQ_GLOBAL_CLOCK_UPDATE 22 137 #define KVM_REQ_ENABLE_IBS 23 138 #define KVM_REQ_DISABLE_IBS 24 139 140 #define KVM_USERSPACE_IRQ_SOURCE_ID 0 141 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1 142 143 struct kvm; 144 struct kvm_vcpu; 145 extern struct kmem_cache *kvm_vcpu_cache; 146 147 extern spinlock_t kvm_lock; 148 extern struct list_head vm_list; 149 150 struct kvm_io_range { 151 gpa_t addr; 152 int len; 153 struct kvm_io_device *dev; 154 }; 155 156 #define NR_IOBUS_DEVS 1000 157 158 struct kvm_io_bus { 159 int dev_count; 160 int ioeventfd_count; 161 struct kvm_io_range range[]; 162 }; 163 164 enum kvm_bus { 165 KVM_MMIO_BUS, 166 KVM_PIO_BUS, 167 KVM_VIRTIO_CCW_NOTIFY_BUS, 168 KVM_FAST_MMIO_BUS, 169 KVM_NR_BUSES 170 }; 171 172 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, 173 int len, const void *val); 174 int kvm_io_bus_write_cookie(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, 175 int len, const void *val, long cookie); 176 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len, 177 void *val); 178 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, 179 int len, struct kvm_io_device *dev); 180 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx, 181 struct kvm_io_device *dev); 182 183 #ifdef CONFIG_KVM_ASYNC_PF 184 struct kvm_async_pf { 185 struct work_struct work; 186 struct list_head link; 187 struct list_head queue; 188 struct kvm_vcpu *vcpu; 189 struct mm_struct *mm; 190 gva_t gva; 191 unsigned long addr; 192 struct kvm_arch_async_pf arch; 193 bool wakeup_all; 194 }; 195 196 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu); 197 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu); 198 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva, 199 struct kvm_arch_async_pf *arch); 200 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu); 201 #endif 202 203 enum { 204 OUTSIDE_GUEST_MODE, 205 IN_GUEST_MODE, 206 EXITING_GUEST_MODE, 207 READING_SHADOW_PAGE_TABLES, 208 }; 209 210 /* 211 * Sometimes a large or cross-page mmio needs to be broken up into separate 212 * exits for userspace servicing. 213 */ 214 struct kvm_mmio_fragment { 215 gpa_t gpa; 216 void *data; 217 unsigned len; 218 }; 219 220 struct kvm_vcpu { 221 struct kvm *kvm; 222 #ifdef CONFIG_PREEMPT_NOTIFIERS 223 struct preempt_notifier preempt_notifier; 224 #endif 225 int cpu; 226 int vcpu_id; 227 int srcu_idx; 228 int mode; 229 unsigned long requests; 230 unsigned long guest_debug; 231 232 struct mutex mutex; 233 struct kvm_run *run; 234 235 int fpu_active; 236 int guest_fpu_loaded, guest_xcr0_loaded; 237 wait_queue_head_t wq; 238 struct pid *pid; 239 int sigset_active; 240 sigset_t sigset; 241 struct kvm_vcpu_stat stat; 242 243 #ifdef CONFIG_HAS_IOMEM 244 int mmio_needed; 245 int mmio_read_completed; 246 int mmio_is_write; 247 int mmio_cur_fragment; 248 int mmio_nr_fragments; 249 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS]; 250 #endif 251 252 #ifdef CONFIG_KVM_ASYNC_PF 253 struct { 254 u32 queued; 255 struct list_head queue; 256 struct list_head done; 257 spinlock_t lock; 258 } async_pf; 259 #endif 260 261 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT 262 /* 263 * Cpu relax intercept or pause loop exit optimization 264 * in_spin_loop: set when a vcpu does a pause loop exit 265 * or cpu relax intercepted. 266 * dy_eligible: indicates whether vcpu is eligible for directed yield. 267 */ 268 struct { 269 bool in_spin_loop; 270 bool dy_eligible; 271 } spin_loop; 272 #endif 273 bool preempted; 274 struct kvm_vcpu_arch arch; 275 }; 276 277 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu) 278 { 279 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE); 280 } 281 282 /* 283 * Some of the bitops functions do not support too long bitmaps. 284 * This number must be determined not to exceed such limits. 285 */ 286 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1) 287 288 struct kvm_memory_slot { 289 gfn_t base_gfn; 290 unsigned long npages; 291 unsigned long *dirty_bitmap; 292 struct kvm_arch_memory_slot arch; 293 unsigned long userspace_addr; 294 u32 flags; 295 short id; 296 }; 297 298 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot) 299 { 300 return ALIGN(memslot->npages, BITS_PER_LONG) / 8; 301 } 302 303 struct kvm_s390_adapter_int { 304 u64 ind_addr; 305 u64 summary_addr; 306 u64 ind_offset; 307 u32 summary_offset; 308 u32 adapter_id; 309 }; 310 311 struct kvm_kernel_irq_routing_entry { 312 u32 gsi; 313 u32 type; 314 int (*set)(struct kvm_kernel_irq_routing_entry *e, 315 struct kvm *kvm, int irq_source_id, int level, 316 bool line_status); 317 union { 318 struct { 319 unsigned irqchip; 320 unsigned pin; 321 } irqchip; 322 struct msi_msg msi; 323 struct kvm_s390_adapter_int adapter; 324 }; 325 struct hlist_node link; 326 }; 327 328 struct kvm_irq_routing_table; 329 330 #ifndef KVM_PRIVATE_MEM_SLOTS 331 #define KVM_PRIVATE_MEM_SLOTS 0 332 #endif 333 334 #ifndef KVM_MEM_SLOTS_NUM 335 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS) 336 #endif 337 338 /* 339 * Note: 340 * memslots are not sorted by id anymore, please use id_to_memslot() 341 * to get the memslot by its id. 342 */ 343 struct kvm_memslots { 344 u64 generation; 345 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM]; 346 /* The mapping table from slot id to the index in memslots[]. */ 347 short id_to_index[KVM_MEM_SLOTS_NUM]; 348 }; 349 350 struct kvm { 351 spinlock_t mmu_lock; 352 struct mutex slots_lock; 353 struct mm_struct *mm; /* userspace tied to this vm */ 354 struct kvm_memslots *memslots; 355 struct srcu_struct srcu; 356 struct srcu_struct irq_srcu; 357 #ifdef CONFIG_KVM_APIC_ARCHITECTURE 358 u32 bsp_vcpu_id; 359 #endif 360 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; 361 atomic_t online_vcpus; 362 int last_boosted_vcpu; 363 struct list_head vm_list; 364 struct mutex lock; 365 struct kvm_io_bus *buses[KVM_NR_BUSES]; 366 #ifdef CONFIG_HAVE_KVM_EVENTFD 367 struct { 368 spinlock_t lock; 369 struct list_head items; 370 struct list_head resampler_list; 371 struct mutex resampler_lock; 372 } irqfds; 373 struct list_head ioeventfds; 374 #endif 375 struct kvm_vm_stat stat; 376 struct kvm_arch arch; 377 atomic_t users_count; 378 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET 379 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; 380 spinlock_t ring_lock; 381 struct list_head coalesced_zones; 382 #endif 383 384 struct mutex irq_lock; 385 #ifdef CONFIG_HAVE_KVM_IRQCHIP 386 /* 387 * Update side is protected by irq_lock. 388 */ 389 struct kvm_irq_routing_table __rcu *irq_routing; 390 struct hlist_head mask_notifier_list; 391 #endif 392 #ifdef CONFIG_HAVE_KVM_IRQFD 393 struct hlist_head irq_ack_notifier_list; 394 #endif 395 396 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) 397 struct mmu_notifier mmu_notifier; 398 unsigned long mmu_notifier_seq; 399 long mmu_notifier_count; 400 #endif 401 long tlbs_dirty; 402 struct list_head devices; 403 }; 404 405 #define kvm_err(fmt, ...) \ 406 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) 407 #define kvm_info(fmt, ...) \ 408 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) 409 #define kvm_debug(fmt, ...) \ 410 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) 411 #define kvm_pr_unimpl(fmt, ...) \ 412 pr_err_ratelimited("kvm [%i]: " fmt, \ 413 task_tgid_nr(current), ## __VA_ARGS__) 414 415 /* The guest did something we don't support. */ 416 #define vcpu_unimpl(vcpu, fmt, ...) \ 417 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__) 418 419 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i) 420 { 421 smp_rmb(); 422 return kvm->vcpus[i]; 423 } 424 425 #define kvm_for_each_vcpu(idx, vcpup, kvm) \ 426 for (idx = 0; \ 427 idx < atomic_read(&kvm->online_vcpus) && \ 428 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \ 429 idx++) 430 431 #define kvm_for_each_memslot(memslot, slots) \ 432 for (memslot = &slots->memslots[0]; \ 433 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\ 434 memslot++) 435 436 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); 437 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); 438 439 int __must_check vcpu_load(struct kvm_vcpu *vcpu); 440 void vcpu_put(struct kvm_vcpu *vcpu); 441 442 #ifdef CONFIG_HAVE_KVM_IRQFD 443 int kvm_irqfd_init(void); 444 void kvm_irqfd_exit(void); 445 #else 446 static inline int kvm_irqfd_init(void) 447 { 448 return 0; 449 } 450 451 static inline void kvm_irqfd_exit(void) 452 { 453 } 454 #endif 455 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, 456 struct module *module); 457 void kvm_exit(void); 458 459 void kvm_get_kvm(struct kvm *kvm); 460 void kvm_put_kvm(struct kvm *kvm); 461 462 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm) 463 { 464 return rcu_dereference_check(kvm->memslots, 465 srcu_read_lock_held(&kvm->srcu) 466 || lockdep_is_held(&kvm->slots_lock)); 467 } 468 469 static inline struct kvm_memory_slot * 470 id_to_memslot(struct kvm_memslots *slots, int id) 471 { 472 int index = slots->id_to_index[id]; 473 struct kvm_memory_slot *slot; 474 475 slot = &slots->memslots[index]; 476 477 WARN_ON(slot->id != id); 478 return slot; 479 } 480 481 /* 482 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations: 483 * - create a new memory slot 484 * - delete an existing memory slot 485 * - modify an existing memory slot 486 * -- move it in the guest physical memory space 487 * -- just change its flags 488 * 489 * Since flags can be changed by some of these operations, the following 490 * differentiation is the best we can do for __kvm_set_memory_region(): 491 */ 492 enum kvm_mr_change { 493 KVM_MR_CREATE, 494 KVM_MR_DELETE, 495 KVM_MR_MOVE, 496 KVM_MR_FLAGS_ONLY, 497 }; 498 499 int kvm_set_memory_region(struct kvm *kvm, 500 struct kvm_userspace_memory_region *mem); 501 int __kvm_set_memory_region(struct kvm *kvm, 502 struct kvm_userspace_memory_region *mem); 503 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, 504 struct kvm_memory_slot *dont); 505 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, 506 unsigned long npages); 507 void kvm_arch_memslots_updated(struct kvm *kvm); 508 int kvm_arch_prepare_memory_region(struct kvm *kvm, 509 struct kvm_memory_slot *memslot, 510 struct kvm_userspace_memory_region *mem, 511 enum kvm_mr_change change); 512 void kvm_arch_commit_memory_region(struct kvm *kvm, 513 struct kvm_userspace_memory_region *mem, 514 const struct kvm_memory_slot *old, 515 enum kvm_mr_change change); 516 bool kvm_largepages_enabled(void); 517 void kvm_disable_largepages(void); 518 /* flush all memory translations */ 519 void kvm_arch_flush_shadow_all(struct kvm *kvm); 520 /* flush memory translations pointing to 'slot' */ 521 void kvm_arch_flush_shadow_memslot(struct kvm *kvm, 522 struct kvm_memory_slot *slot); 523 524 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages, 525 int nr_pages); 526 527 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); 528 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); 529 unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable); 530 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn); 531 void kvm_release_page_clean(struct page *page); 532 void kvm_release_page_dirty(struct page *page); 533 void kvm_set_page_accessed(struct page *page); 534 535 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn); 536 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async, 537 bool write_fault, bool *writable); 538 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); 539 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault, 540 bool *writable); 541 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn); 542 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn); 543 544 void kvm_release_pfn_clean(pfn_t pfn); 545 void kvm_set_pfn_dirty(pfn_t pfn); 546 void kvm_set_pfn_accessed(pfn_t pfn); 547 void kvm_get_pfn(pfn_t pfn); 548 549 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, 550 int len); 551 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, 552 unsigned long len); 553 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); 554 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 555 void *data, unsigned long len); 556 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, 557 int offset, int len); 558 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, 559 unsigned long len); 560 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 561 void *data, unsigned long len); 562 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 563 gpa_t gpa, unsigned long len); 564 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); 565 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); 566 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); 567 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); 568 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn); 569 void mark_page_dirty(struct kvm *kvm, gfn_t gfn); 570 571 void kvm_vcpu_block(struct kvm_vcpu *vcpu); 572 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 573 int kvm_vcpu_yield_to(struct kvm_vcpu *target); 574 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu); 575 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); 576 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); 577 578 void kvm_flush_remote_tlbs(struct kvm *kvm); 579 void kvm_reload_remote_mmus(struct kvm *kvm); 580 void kvm_make_mclock_inprogress_request(struct kvm *kvm); 581 void kvm_make_scan_ioapic_request(struct kvm *kvm); 582 583 long kvm_arch_dev_ioctl(struct file *filp, 584 unsigned int ioctl, unsigned long arg); 585 long kvm_arch_vcpu_ioctl(struct file *filp, 586 unsigned int ioctl, unsigned long arg); 587 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf); 588 589 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext); 590 591 int kvm_get_dirty_log(struct kvm *kvm, 592 struct kvm_dirty_log *log, int *is_dirty); 593 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, 594 struct kvm_dirty_log *log); 595 596 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level, 597 bool line_status); 598 long kvm_arch_vm_ioctl(struct file *filp, 599 unsigned int ioctl, unsigned long arg); 600 601 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 602 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 603 604 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 605 struct kvm_translation *tr); 606 607 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 608 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 609 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 610 struct kvm_sregs *sregs); 611 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 612 struct kvm_sregs *sregs); 613 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 614 struct kvm_mp_state *mp_state); 615 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 616 struct kvm_mp_state *mp_state); 617 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, 618 struct kvm_guest_debug *dbg); 619 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); 620 621 int kvm_arch_init(void *opaque); 622 void kvm_arch_exit(void); 623 624 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); 625 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); 626 627 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); 628 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 629 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 630 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); 631 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); 632 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu); 633 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); 634 635 int kvm_arch_hardware_enable(void *garbage); 636 void kvm_arch_hardware_disable(void *garbage); 637 int kvm_arch_hardware_setup(void); 638 void kvm_arch_hardware_unsetup(void); 639 void kvm_arch_check_processor_compat(void *rtn); 640 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); 641 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu); 642 643 void *kvm_kvzalloc(unsigned long size); 644 void kvm_kvfree(const void *addr); 645 646 #ifndef __KVM_HAVE_ARCH_VM_ALLOC 647 static inline struct kvm *kvm_arch_alloc_vm(void) 648 { 649 return kzalloc(sizeof(struct kvm), GFP_KERNEL); 650 } 651 652 static inline void kvm_arch_free_vm(struct kvm *kvm) 653 { 654 kfree(kvm); 655 } 656 #endif 657 658 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA 659 void kvm_arch_register_noncoherent_dma(struct kvm *kvm); 660 void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm); 661 bool kvm_arch_has_noncoherent_dma(struct kvm *kvm); 662 #else 663 static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm) 664 { 665 } 666 667 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm) 668 { 669 } 670 671 static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm) 672 { 673 return false; 674 } 675 #endif 676 677 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu) 678 { 679 #ifdef __KVM_HAVE_ARCH_WQP 680 return vcpu->arch.wqp; 681 #else 682 return &vcpu->wq; 683 #endif 684 } 685 686 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type); 687 void kvm_arch_destroy_vm(struct kvm *kvm); 688 void kvm_arch_sync_events(struct kvm *kvm); 689 690 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); 691 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 692 693 bool kvm_is_mmio_pfn(pfn_t pfn); 694 695 struct kvm_irq_ack_notifier { 696 struct hlist_node link; 697 unsigned gsi; 698 void (*irq_acked)(struct kvm_irq_ack_notifier *kian); 699 }; 700 701 struct kvm_assigned_dev_kernel { 702 struct kvm_irq_ack_notifier ack_notifier; 703 struct list_head list; 704 int assigned_dev_id; 705 int host_segnr; 706 int host_busnr; 707 int host_devfn; 708 unsigned int entries_nr; 709 int host_irq; 710 bool host_irq_disabled; 711 bool pci_2_3; 712 struct msix_entry *host_msix_entries; 713 int guest_irq; 714 struct msix_entry *guest_msix_entries; 715 unsigned long irq_requested_type; 716 int irq_source_id; 717 int flags; 718 struct pci_dev *dev; 719 struct kvm *kvm; 720 spinlock_t intx_lock; 721 spinlock_t intx_mask_lock; 722 char irq_name[32]; 723 struct pci_saved_state *pci_saved_state; 724 }; 725 726 struct kvm_irq_mask_notifier { 727 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked); 728 int irq; 729 struct hlist_node link; 730 }; 731 732 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, 733 struct kvm_irq_mask_notifier *kimn); 734 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, 735 struct kvm_irq_mask_notifier *kimn); 736 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin, 737 bool mask); 738 739 int kvm_irq_map_gsi(struct kvm *kvm, 740 struct kvm_kernel_irq_routing_entry *entries, int gsi); 741 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin); 742 743 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level, 744 bool line_status); 745 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level); 746 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm, 747 int irq_source_id, int level, bool line_status); 748 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin); 749 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin); 750 void kvm_register_irq_ack_notifier(struct kvm *kvm, 751 struct kvm_irq_ack_notifier *kian); 752 void kvm_unregister_irq_ack_notifier(struct kvm *kvm, 753 struct kvm_irq_ack_notifier *kian); 754 int kvm_request_irq_source_id(struct kvm *kvm); 755 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id); 756 757 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT 758 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot); 759 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot); 760 int kvm_iommu_map_guest(struct kvm *kvm); 761 int kvm_iommu_unmap_guest(struct kvm *kvm); 762 int kvm_assign_device(struct kvm *kvm, 763 struct kvm_assigned_dev_kernel *assigned_dev); 764 int kvm_deassign_device(struct kvm *kvm, 765 struct kvm_assigned_dev_kernel *assigned_dev); 766 #else 767 static inline int kvm_iommu_map_pages(struct kvm *kvm, 768 struct kvm_memory_slot *slot) 769 { 770 return 0; 771 } 772 773 static inline void kvm_iommu_unmap_pages(struct kvm *kvm, 774 struct kvm_memory_slot *slot) 775 { 776 } 777 778 static inline int kvm_iommu_unmap_guest(struct kvm *kvm) 779 { 780 return 0; 781 } 782 #endif 783 784 static inline void kvm_guest_enter(void) 785 { 786 unsigned long flags; 787 788 BUG_ON(preemptible()); 789 790 local_irq_save(flags); 791 guest_enter(); 792 local_irq_restore(flags); 793 794 /* KVM does not hold any references to rcu protected data when it 795 * switches CPU into a guest mode. In fact switching to a guest mode 796 * is very similar to exiting to userspace from rcu point of view. In 797 * addition CPU may stay in a guest mode for quite a long time (up to 798 * one time slice). Lets treat guest mode as quiescent state, just like 799 * we do with user-mode execution. 800 */ 801 rcu_virt_note_context_switch(smp_processor_id()); 802 } 803 804 static inline void kvm_guest_exit(void) 805 { 806 unsigned long flags; 807 808 local_irq_save(flags); 809 guest_exit(); 810 local_irq_restore(flags); 811 } 812 813 /* 814 * search_memslots() and __gfn_to_memslot() are here because they are 815 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c. 816 * gfn_to_memslot() itself isn't here as an inline because that would 817 * bloat other code too much. 818 */ 819 static inline struct kvm_memory_slot * 820 search_memslots(struct kvm_memslots *slots, gfn_t gfn) 821 { 822 struct kvm_memory_slot *memslot; 823 824 kvm_for_each_memslot(memslot, slots) 825 if (gfn >= memslot->base_gfn && 826 gfn < memslot->base_gfn + memslot->npages) 827 return memslot; 828 829 return NULL; 830 } 831 832 static inline struct kvm_memory_slot * 833 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn) 834 { 835 return search_memslots(slots, gfn); 836 } 837 838 static inline unsigned long 839 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn) 840 { 841 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE; 842 } 843 844 static inline int memslot_id(struct kvm *kvm, gfn_t gfn) 845 { 846 return gfn_to_memslot(kvm, gfn)->id; 847 } 848 849 static inline gfn_t 850 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot) 851 { 852 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT; 853 854 return slot->base_gfn + gfn_offset; 855 } 856 857 static inline gpa_t gfn_to_gpa(gfn_t gfn) 858 { 859 return (gpa_t)gfn << PAGE_SHIFT; 860 } 861 862 static inline gfn_t gpa_to_gfn(gpa_t gpa) 863 { 864 return (gfn_t)(gpa >> PAGE_SHIFT); 865 } 866 867 static inline hpa_t pfn_to_hpa(pfn_t pfn) 868 { 869 return (hpa_t)pfn << PAGE_SHIFT; 870 } 871 872 static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa) 873 { 874 unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa)); 875 876 return kvm_is_error_hva(hva); 877 } 878 879 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) 880 { 881 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); 882 } 883 884 enum kvm_stat_kind { 885 KVM_STAT_VM, 886 KVM_STAT_VCPU, 887 }; 888 889 struct kvm_stats_debugfs_item { 890 const char *name; 891 int offset; 892 enum kvm_stat_kind kind; 893 struct dentry *dentry; 894 }; 895 extern struct kvm_stats_debugfs_item debugfs_entries[]; 896 extern struct dentry *kvm_debugfs_dir; 897 898 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) 899 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq) 900 { 901 if (unlikely(kvm->mmu_notifier_count)) 902 return 1; 903 /* 904 * Ensure the read of mmu_notifier_count happens before the read 905 * of mmu_notifier_seq. This interacts with the smp_wmb() in 906 * mmu_notifier_invalidate_range_end to make sure that the caller 907 * either sees the old (non-zero) value of mmu_notifier_count or 908 * the new (incremented) value of mmu_notifier_seq. 909 * PowerPC Book3s HV KVM calls this under a per-page lock 910 * rather than under kvm->mmu_lock, for scalability, so 911 * can't rely on kvm->mmu_lock to keep things ordered. 912 */ 913 smp_rmb(); 914 if (kvm->mmu_notifier_seq != mmu_seq) 915 return 1; 916 return 0; 917 } 918 #endif 919 920 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING 921 922 #ifdef CONFIG_S390 923 #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that... 924 #else 925 #define KVM_MAX_IRQ_ROUTES 1024 926 #endif 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 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e, 934 const struct kvm_irq_routing_entry *ue); 935 void kvm_free_irq_routing(struct kvm *kvm); 936 937 #else 938 939 static inline void kvm_free_irq_routing(struct kvm *kvm) {} 940 941 #endif 942 943 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi); 944 945 #ifdef CONFIG_HAVE_KVM_EVENTFD 946 947 void kvm_eventfd_init(struct kvm *kvm); 948 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args); 949 950 #ifdef CONFIG_HAVE_KVM_IRQFD 951 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args); 952 void kvm_irqfd_release(struct kvm *kvm); 953 void kvm_irq_routing_update(struct kvm *); 954 #else 955 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args) 956 { 957 return -EINVAL; 958 } 959 960 static inline void kvm_irqfd_release(struct kvm *kvm) {} 961 #endif 962 963 #else 964 965 static inline void kvm_eventfd_init(struct kvm *kvm) {} 966 967 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args) 968 { 969 return -EINVAL; 970 } 971 972 static inline void kvm_irqfd_release(struct kvm *kvm) {} 973 974 #ifdef CONFIG_HAVE_KVM_IRQCHIP 975 static inline void kvm_irq_routing_update(struct kvm *kvm) 976 { 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 CONFIG_KVM_DEVICE_ASSIGNMENT 1002 1003 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, 1004 unsigned long arg); 1005 1006 void kvm_free_all_assigned_devices(struct kvm *kvm); 1007 1008 #else 1009 1010 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, 1011 unsigned long arg) 1012 { 1013 return -ENOTTY; 1014 } 1015 1016 static inline void kvm_free_all_assigned_devices(struct kvm *kvm) {} 1017 1018 #endif 1019 1020 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu) 1021 { 1022 set_bit(req, &vcpu->requests); 1023 } 1024 1025 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu) 1026 { 1027 if (test_bit(req, &vcpu->requests)) { 1028 clear_bit(req, &vcpu->requests); 1029 return true; 1030 } else { 1031 return false; 1032 } 1033 } 1034 1035 extern bool kvm_rebooting; 1036 1037 struct kvm_device_ops; 1038 1039 struct kvm_device { 1040 struct kvm_device_ops *ops; 1041 struct kvm *kvm; 1042 void *private; 1043 struct list_head vm_node; 1044 }; 1045 1046 /* create, destroy, and name are mandatory */ 1047 struct kvm_device_ops { 1048 const char *name; 1049 int (*create)(struct kvm_device *dev, u32 type); 1050 1051 /* 1052 * Destroy is responsible for freeing dev. 1053 * 1054 * Destroy may be called before or after destructors are called 1055 * on emulated I/O regions, depending on whether a reference is 1056 * held by a vcpu or other kvm component that gets destroyed 1057 * after the emulated I/O. 1058 */ 1059 void (*destroy)(struct kvm_device *dev); 1060 1061 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr); 1062 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr); 1063 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr); 1064 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl, 1065 unsigned long arg); 1066 }; 1067 1068 void kvm_device_get(struct kvm_device *dev); 1069 void kvm_device_put(struct kvm_device *dev); 1070 struct kvm_device *kvm_device_from_filp(struct file *filp); 1071 1072 extern struct kvm_device_ops kvm_mpic_ops; 1073 extern struct kvm_device_ops kvm_xics_ops; 1074 extern struct kvm_device_ops kvm_vfio_ops; 1075 extern struct kvm_device_ops kvm_arm_vgic_v2_ops; 1076 extern struct kvm_device_ops kvm_flic_ops; 1077 1078 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT 1079 1080 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val) 1081 { 1082 vcpu->spin_loop.in_spin_loop = val; 1083 } 1084 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val) 1085 { 1086 vcpu->spin_loop.dy_eligible = val; 1087 } 1088 1089 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */ 1090 1091 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val) 1092 { 1093 } 1094 1095 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val) 1096 { 1097 } 1098 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */ 1099 #endif 1100 1101