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/mm.h> 17 #include <linux/preempt.h> 18 #include <linux/msi.h> 19 #include <asm/signal.h> 20 21 #include <linux/kvm.h> 22 #include <linux/kvm_para.h> 23 24 #include <linux/kvm_types.h> 25 26 #include <asm/kvm_host.h> 27 28 /* 29 * vcpu->requests bit members 30 */ 31 #define KVM_REQ_TLB_FLUSH 0 32 #define KVM_REQ_MIGRATE_TIMER 1 33 #define KVM_REQ_REPORT_TPR_ACCESS 2 34 #define KVM_REQ_MMU_RELOAD 3 35 #define KVM_REQ_TRIPLE_FAULT 4 36 #define KVM_REQ_PENDING_TIMER 5 37 #define KVM_REQ_UNHALT 6 38 #define KVM_REQ_MMU_SYNC 7 39 #define KVM_REQ_KVMCLOCK_UPDATE 8 40 #define KVM_REQ_KICK 9 41 42 #define KVM_USERSPACE_IRQ_SOURCE_ID 0 43 44 struct kvm; 45 struct kvm_vcpu; 46 extern struct kmem_cache *kvm_vcpu_cache; 47 48 /* 49 * It would be nice to use something smarter than a linear search, TBD... 50 * Thankfully we dont expect many devices to register (famous last words :), 51 * so until then it will suffice. At least its abstracted so we can change 52 * in one place. 53 */ 54 struct kvm_io_bus { 55 int dev_count; 56 #define NR_IOBUS_DEVS 6 57 struct kvm_io_device *devs[NR_IOBUS_DEVS]; 58 }; 59 60 void kvm_io_bus_init(struct kvm_io_bus *bus); 61 void kvm_io_bus_destroy(struct kvm_io_bus *bus); 62 int kvm_io_bus_write(struct kvm_io_bus *bus, gpa_t addr, int len, 63 const void *val); 64 int kvm_io_bus_read(struct kvm_io_bus *bus, gpa_t addr, int len, 65 void *val); 66 int __kvm_io_bus_register_dev(struct kvm_io_bus *bus, 67 struct kvm_io_device *dev); 68 int kvm_io_bus_register_dev(struct kvm *kvm, struct kvm_io_bus *bus, 69 struct kvm_io_device *dev); 70 void __kvm_io_bus_unregister_dev(struct kvm_io_bus *bus, 71 struct kvm_io_device *dev); 72 void kvm_io_bus_unregister_dev(struct kvm *kvm, struct kvm_io_bus *bus, 73 struct kvm_io_device *dev); 74 75 struct kvm_vcpu { 76 struct kvm *kvm; 77 #ifdef CONFIG_PREEMPT_NOTIFIERS 78 struct preempt_notifier preempt_notifier; 79 #endif 80 int vcpu_id; 81 struct mutex mutex; 82 int cpu; 83 struct kvm_run *run; 84 unsigned long requests; 85 unsigned long guest_debug; 86 int fpu_active; 87 int guest_fpu_loaded; 88 wait_queue_head_t wq; 89 int sigset_active; 90 sigset_t sigset; 91 struct kvm_vcpu_stat stat; 92 93 #ifdef CONFIG_HAS_IOMEM 94 int mmio_needed; 95 int mmio_read_completed; 96 int mmio_is_write; 97 int mmio_size; 98 unsigned char mmio_data[8]; 99 gpa_t mmio_phys_addr; 100 #endif 101 102 struct kvm_vcpu_arch arch; 103 }; 104 105 struct kvm_memory_slot { 106 gfn_t base_gfn; 107 unsigned long npages; 108 unsigned long flags; 109 unsigned long *rmap; 110 unsigned long *dirty_bitmap; 111 struct { 112 unsigned long rmap_pde; 113 int write_count; 114 } *lpage_info[KVM_NR_PAGE_SIZES - 1]; 115 unsigned long userspace_addr; 116 int user_alloc; 117 }; 118 119 struct kvm_kernel_irq_routing_entry { 120 u32 gsi; 121 u32 type; 122 int (*set)(struct kvm_kernel_irq_routing_entry *e, 123 struct kvm *kvm, int level); 124 union { 125 struct { 126 unsigned irqchip; 127 unsigned pin; 128 } irqchip; 129 struct msi_msg msi; 130 }; 131 struct list_head link; 132 }; 133 134 struct kvm { 135 spinlock_t mmu_lock; 136 spinlock_t requests_lock; 137 struct rw_semaphore slots_lock; 138 struct mm_struct *mm; /* userspace tied to this vm */ 139 int nmemslots; 140 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS + 141 KVM_PRIVATE_MEM_SLOTS]; 142 #ifdef CONFIG_KVM_APIC_ARCHITECTURE 143 u32 bsp_vcpu_id; 144 struct kvm_vcpu *bsp_vcpu; 145 #endif 146 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; 147 atomic_t online_vcpus; 148 struct list_head vm_list; 149 struct mutex lock; 150 struct kvm_io_bus mmio_bus; 151 struct kvm_io_bus pio_bus; 152 #ifdef CONFIG_HAVE_KVM_EVENTFD 153 struct { 154 spinlock_t lock; 155 struct list_head items; 156 } irqfds; 157 struct list_head ioeventfds; 158 #endif 159 struct kvm_vm_stat stat; 160 struct kvm_arch arch; 161 atomic_t users_count; 162 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET 163 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev; 164 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; 165 #endif 166 167 struct mutex irq_lock; 168 #ifdef CONFIG_HAVE_KVM_IRQCHIP 169 struct list_head irq_routing; /* of kvm_kernel_irq_routing_entry */ 170 struct hlist_head mask_notifier_list; 171 #endif 172 173 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 174 struct mmu_notifier mmu_notifier; 175 unsigned long mmu_notifier_seq; 176 long mmu_notifier_count; 177 #endif 178 }; 179 180 /* The guest did something we don't support. */ 181 #define pr_unimpl(vcpu, fmt, ...) \ 182 do { \ 183 if (printk_ratelimit()) \ 184 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \ 185 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \ 186 } while (0) 187 188 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt) 189 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt) 190 191 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i) 192 { 193 smp_rmb(); 194 return kvm->vcpus[i]; 195 } 196 197 #define kvm_for_each_vcpu(idx, vcpup, kvm) \ 198 for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \ 199 idx < atomic_read(&kvm->online_vcpus) && vcpup; \ 200 vcpup = kvm_get_vcpu(kvm, ++idx)) 201 202 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); 203 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); 204 205 void vcpu_load(struct kvm_vcpu *vcpu); 206 void vcpu_put(struct kvm_vcpu *vcpu); 207 208 int kvm_init(void *opaque, unsigned int vcpu_size, 209 struct module *module); 210 void kvm_exit(void); 211 212 void kvm_get_kvm(struct kvm *kvm); 213 void kvm_put_kvm(struct kvm *kvm); 214 215 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1) 216 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB) 217 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; } 218 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva); 219 220 extern struct page *bad_page; 221 extern pfn_t bad_pfn; 222 223 int is_error_page(struct page *page); 224 int is_error_pfn(pfn_t pfn); 225 int kvm_is_error_hva(unsigned long addr); 226 int kvm_set_memory_region(struct kvm *kvm, 227 struct kvm_userspace_memory_region *mem, 228 int user_alloc); 229 int __kvm_set_memory_region(struct kvm *kvm, 230 struct kvm_userspace_memory_region *mem, 231 int user_alloc); 232 int kvm_arch_set_memory_region(struct kvm *kvm, 233 struct kvm_userspace_memory_region *mem, 234 struct kvm_memory_slot old, 235 int user_alloc); 236 void kvm_disable_largepages(void); 237 void kvm_arch_flush_shadow(struct kvm *kvm); 238 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn); 239 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); 240 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); 241 void kvm_release_page_clean(struct page *page); 242 void kvm_release_page_dirty(struct page *page); 243 void kvm_set_page_dirty(struct page *page); 244 void kvm_set_page_accessed(struct page *page); 245 246 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); 247 void kvm_release_pfn_dirty(pfn_t); 248 void kvm_release_pfn_clean(pfn_t pfn); 249 void kvm_set_pfn_dirty(pfn_t pfn); 250 void kvm_set_pfn_accessed(pfn_t pfn); 251 void kvm_get_pfn(pfn_t pfn); 252 253 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, 254 int len); 255 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, 256 unsigned long len); 257 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); 258 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, 259 int offset, int len); 260 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, 261 unsigned long len); 262 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); 263 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); 264 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); 265 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); 266 void mark_page_dirty(struct kvm *kvm, gfn_t gfn); 267 268 void kvm_vcpu_block(struct kvm_vcpu *vcpu); 269 void kvm_resched(struct kvm_vcpu *vcpu); 270 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); 271 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); 272 void kvm_flush_remote_tlbs(struct kvm *kvm); 273 void kvm_reload_remote_mmus(struct kvm *kvm); 274 275 long kvm_arch_dev_ioctl(struct file *filp, 276 unsigned int ioctl, unsigned long arg); 277 long kvm_arch_vcpu_ioctl(struct file *filp, 278 unsigned int ioctl, unsigned long arg); 279 280 int kvm_dev_ioctl_check_extension(long ext); 281 282 int kvm_get_dirty_log(struct kvm *kvm, 283 struct kvm_dirty_log *log, int *is_dirty); 284 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, 285 struct kvm_dirty_log *log); 286 287 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, 288 struct 289 kvm_userspace_memory_region *mem, 290 int user_alloc); 291 long kvm_arch_vm_ioctl(struct file *filp, 292 unsigned int ioctl, unsigned long arg); 293 294 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 295 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 296 297 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 298 struct kvm_translation *tr); 299 300 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 301 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 302 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 303 struct kvm_sregs *sregs); 304 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 305 struct kvm_sregs *sregs); 306 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 307 struct kvm_mp_state *mp_state); 308 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 309 struct kvm_mp_state *mp_state); 310 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, 311 struct kvm_guest_debug *dbg); 312 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); 313 314 int kvm_arch_init(void *opaque); 315 void kvm_arch_exit(void); 316 317 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); 318 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); 319 320 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); 321 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 322 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 323 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); 324 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); 325 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); 326 327 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu); 328 void kvm_arch_hardware_enable(void *garbage); 329 void kvm_arch_hardware_disable(void *garbage); 330 int kvm_arch_hardware_setup(void); 331 void kvm_arch_hardware_unsetup(void); 332 void kvm_arch_check_processor_compat(void *rtn); 333 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); 334 335 void kvm_free_physmem(struct kvm *kvm); 336 337 struct kvm *kvm_arch_create_vm(void); 338 void kvm_arch_destroy_vm(struct kvm *kvm); 339 void kvm_free_all_assigned_devices(struct kvm *kvm); 340 void kvm_arch_sync_events(struct kvm *kvm); 341 342 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); 343 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 344 345 int kvm_is_mmio_pfn(pfn_t pfn); 346 347 struct kvm_irq_ack_notifier { 348 struct hlist_node link; 349 unsigned gsi; 350 void (*irq_acked)(struct kvm_irq_ack_notifier *kian); 351 }; 352 353 #define KVM_ASSIGNED_MSIX_PENDING 0x1 354 struct kvm_guest_msix_entry { 355 u32 vector; 356 u16 entry; 357 u16 flags; 358 }; 359 360 struct kvm_assigned_dev_kernel { 361 struct kvm_irq_ack_notifier ack_notifier; 362 struct work_struct interrupt_work; 363 struct list_head list; 364 int assigned_dev_id; 365 int host_busnr; 366 int host_devfn; 367 unsigned int entries_nr; 368 int host_irq; 369 bool host_irq_disabled; 370 struct msix_entry *host_msix_entries; 371 int guest_irq; 372 struct kvm_guest_msix_entry *guest_msix_entries; 373 unsigned long irq_requested_type; 374 int irq_source_id; 375 int flags; 376 struct pci_dev *dev; 377 struct kvm *kvm; 378 spinlock_t assigned_dev_lock; 379 }; 380 381 struct kvm_irq_mask_notifier { 382 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked); 383 int irq; 384 struct hlist_node link; 385 }; 386 387 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, 388 struct kvm_irq_mask_notifier *kimn); 389 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, 390 struct kvm_irq_mask_notifier *kimn); 391 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask); 392 393 int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level); 394 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin); 395 void kvm_register_irq_ack_notifier(struct kvm *kvm, 396 struct kvm_irq_ack_notifier *kian); 397 void kvm_unregister_irq_ack_notifier(struct kvm *kvm, 398 struct kvm_irq_ack_notifier *kian); 399 int kvm_request_irq_source_id(struct kvm *kvm); 400 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id); 401 402 /* For vcpu->arch.iommu_flags */ 403 #define KVM_IOMMU_CACHE_COHERENCY 0x1 404 405 #ifdef CONFIG_IOMMU_API 406 int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn, 407 unsigned long npages); 408 int kvm_iommu_map_guest(struct kvm *kvm); 409 int kvm_iommu_unmap_guest(struct kvm *kvm); 410 int kvm_assign_device(struct kvm *kvm, 411 struct kvm_assigned_dev_kernel *assigned_dev); 412 int kvm_deassign_device(struct kvm *kvm, 413 struct kvm_assigned_dev_kernel *assigned_dev); 414 #else /* CONFIG_IOMMU_API */ 415 static inline int kvm_iommu_map_pages(struct kvm *kvm, 416 gfn_t base_gfn, 417 unsigned long npages) 418 { 419 return 0; 420 } 421 422 static inline int kvm_iommu_map_guest(struct kvm *kvm) 423 { 424 return -ENODEV; 425 } 426 427 static inline int kvm_iommu_unmap_guest(struct kvm *kvm) 428 { 429 return 0; 430 } 431 432 static inline int kvm_assign_device(struct kvm *kvm, 433 struct kvm_assigned_dev_kernel *assigned_dev) 434 { 435 return 0; 436 } 437 438 static inline int kvm_deassign_device(struct kvm *kvm, 439 struct kvm_assigned_dev_kernel *assigned_dev) 440 { 441 return 0; 442 } 443 #endif /* CONFIG_IOMMU_API */ 444 445 static inline void kvm_guest_enter(void) 446 { 447 account_system_vtime(current); 448 current->flags |= PF_VCPU; 449 } 450 451 static inline void kvm_guest_exit(void) 452 { 453 account_system_vtime(current); 454 current->flags &= ~PF_VCPU; 455 } 456 457 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot) 458 { 459 return slot - kvm->memslots; 460 } 461 462 static inline gpa_t gfn_to_gpa(gfn_t gfn) 463 { 464 return (gpa_t)gfn << PAGE_SHIFT; 465 } 466 467 static inline hpa_t pfn_to_hpa(pfn_t pfn) 468 { 469 return (hpa_t)pfn << PAGE_SHIFT; 470 } 471 472 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) 473 { 474 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); 475 } 476 477 enum kvm_stat_kind { 478 KVM_STAT_VM, 479 KVM_STAT_VCPU, 480 }; 481 482 struct kvm_stats_debugfs_item { 483 const char *name; 484 int offset; 485 enum kvm_stat_kind kind; 486 struct dentry *dentry; 487 }; 488 extern struct kvm_stats_debugfs_item debugfs_entries[]; 489 extern struct dentry *kvm_debugfs_dir; 490 491 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 492 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq) 493 { 494 if (unlikely(vcpu->kvm->mmu_notifier_count)) 495 return 1; 496 /* 497 * Both reads happen under the mmu_lock and both values are 498 * modified under mmu_lock, so there's no need of smb_rmb() 499 * here in between, otherwise mmu_notifier_count should be 500 * read before mmu_notifier_seq, see 501 * mmu_notifier_invalidate_range_end write side. 502 */ 503 if (vcpu->kvm->mmu_notifier_seq != mmu_seq) 504 return 1; 505 return 0; 506 } 507 #endif 508 509 #ifdef CONFIG_HAVE_KVM_IRQCHIP 510 511 #define KVM_MAX_IRQ_ROUTES 1024 512 513 int kvm_setup_default_irq_routing(struct kvm *kvm); 514 int kvm_set_irq_routing(struct kvm *kvm, 515 const struct kvm_irq_routing_entry *entries, 516 unsigned nr, 517 unsigned flags); 518 void kvm_free_irq_routing(struct kvm *kvm); 519 520 #else 521 522 static inline void kvm_free_irq_routing(struct kvm *kvm) {} 523 524 #endif 525 526 #ifdef CONFIG_HAVE_KVM_EVENTFD 527 528 void kvm_eventfd_init(struct kvm *kvm); 529 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags); 530 void kvm_irqfd_release(struct kvm *kvm); 531 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args); 532 533 #else 534 535 static inline void kvm_eventfd_init(struct kvm *kvm) {} 536 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags) 537 { 538 return -EINVAL; 539 } 540 541 static inline void kvm_irqfd_release(struct kvm *kvm) {} 542 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) 543 { 544 return -ENOSYS; 545 } 546 547 #endif /* CONFIG_HAVE_KVM_EVENTFD */ 548 549 #ifdef CONFIG_KVM_APIC_ARCHITECTURE 550 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) 551 { 552 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id; 553 } 554 #endif 555 #endif 556