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/marker.h> 19 #include <linux/msi.h> 20 #include <asm/signal.h> 21 22 #include <linux/kvm.h> 23 #include <linux/kvm_para.h> 24 25 #include <linux/kvm_types.h> 26 27 #include <asm/kvm_host.h> 28 29 /* 30 * vcpu->requests bit members 31 */ 32 #define KVM_REQ_TLB_FLUSH 0 33 #define KVM_REQ_MIGRATE_TIMER 1 34 #define KVM_REQ_REPORT_TPR_ACCESS 2 35 #define KVM_REQ_MMU_RELOAD 3 36 #define KVM_REQ_TRIPLE_FAULT 4 37 #define KVM_REQ_PENDING_TIMER 5 38 #define KVM_REQ_UNHALT 6 39 #define KVM_REQ_MMU_SYNC 7 40 #define KVM_REQ_KVMCLOCK_UPDATE 8 41 #define KVM_REQ_KICK 9 42 43 #define KVM_USERSPACE_IRQ_SOURCE_ID 0 44 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 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, 63 gpa_t addr, int len, int is_write); 64 void kvm_io_bus_register_dev(struct kvm_io_bus *bus, 65 struct kvm_io_device *dev); 66 67 struct kvm_vcpu { 68 struct kvm *kvm; 69 #ifdef CONFIG_PREEMPT_NOTIFIERS 70 struct preempt_notifier preempt_notifier; 71 #endif 72 int vcpu_id; 73 struct mutex mutex; 74 int cpu; 75 struct kvm_run *run; 76 unsigned long requests; 77 unsigned long guest_debug; 78 int fpu_active; 79 int guest_fpu_loaded; 80 wait_queue_head_t wq; 81 int sigset_active; 82 sigset_t sigset; 83 struct kvm_vcpu_stat stat; 84 85 #ifdef CONFIG_HAS_IOMEM 86 int mmio_needed; 87 int mmio_read_completed; 88 int mmio_is_write; 89 int mmio_size; 90 unsigned char mmio_data[8]; 91 gpa_t mmio_phys_addr; 92 #endif 93 94 struct kvm_vcpu_arch arch; 95 }; 96 97 struct kvm_memory_slot { 98 gfn_t base_gfn; 99 unsigned long npages; 100 unsigned long flags; 101 unsigned long *rmap; 102 unsigned long *dirty_bitmap; 103 struct { 104 unsigned long rmap_pde; 105 int write_count; 106 } *lpage_info; 107 unsigned long userspace_addr; 108 int user_alloc; 109 }; 110 111 struct kvm_kernel_irq_routing_entry { 112 u32 gsi; 113 int (*set)(struct kvm_kernel_irq_routing_entry *e, 114 struct kvm *kvm, int level); 115 union { 116 struct { 117 unsigned irqchip; 118 unsigned pin; 119 } irqchip; 120 struct msi_msg msi; 121 }; 122 struct list_head link; 123 }; 124 125 struct kvm { 126 struct mutex lock; /* protects the vcpus array and APIC accesses */ 127 spinlock_t mmu_lock; 128 spinlock_t requests_lock; 129 struct rw_semaphore slots_lock; 130 struct mm_struct *mm; /* userspace tied to this vm */ 131 int nmemslots; 132 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS + 133 KVM_PRIVATE_MEM_SLOTS]; 134 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; 135 struct list_head vm_list; 136 struct kvm_io_bus mmio_bus; 137 struct kvm_io_bus pio_bus; 138 struct kvm_vm_stat stat; 139 struct kvm_arch arch; 140 atomic_t users_count; 141 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET 142 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev; 143 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; 144 #endif 145 146 #ifdef CONFIG_HAVE_KVM_IRQCHIP 147 struct list_head irq_routing; /* of kvm_kernel_irq_routing_entry */ 148 struct hlist_head mask_notifier_list; 149 #endif 150 151 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 152 struct mmu_notifier mmu_notifier; 153 unsigned long mmu_notifier_seq; 154 long mmu_notifier_count; 155 #endif 156 }; 157 158 /* The guest did something we don't support. */ 159 #define pr_unimpl(vcpu, fmt, ...) \ 160 do { \ 161 if (printk_ratelimit()) \ 162 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \ 163 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \ 164 } while (0) 165 166 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt) 167 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt) 168 169 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); 170 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); 171 172 void vcpu_load(struct kvm_vcpu *vcpu); 173 void vcpu_put(struct kvm_vcpu *vcpu); 174 175 int kvm_init(void *opaque, unsigned int vcpu_size, 176 struct module *module); 177 void kvm_exit(void); 178 179 void kvm_get_kvm(struct kvm *kvm); 180 void kvm_put_kvm(struct kvm *kvm); 181 182 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1) 183 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB) 184 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; } 185 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva); 186 187 extern struct page *bad_page; 188 extern pfn_t bad_pfn; 189 190 int is_error_page(struct page *page); 191 int is_error_pfn(pfn_t pfn); 192 int kvm_is_error_hva(unsigned long addr); 193 int kvm_set_memory_region(struct kvm *kvm, 194 struct kvm_userspace_memory_region *mem, 195 int user_alloc); 196 int __kvm_set_memory_region(struct kvm *kvm, 197 struct kvm_userspace_memory_region *mem, 198 int user_alloc); 199 int kvm_arch_set_memory_region(struct kvm *kvm, 200 struct kvm_userspace_memory_region *mem, 201 struct kvm_memory_slot old, 202 int user_alloc); 203 void kvm_arch_flush_shadow(struct kvm *kvm); 204 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn); 205 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); 206 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); 207 void kvm_release_page_clean(struct page *page); 208 void kvm_release_page_dirty(struct page *page); 209 void kvm_set_page_dirty(struct page *page); 210 void kvm_set_page_accessed(struct page *page); 211 212 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); 213 void kvm_release_pfn_dirty(pfn_t); 214 void kvm_release_pfn_clean(pfn_t pfn); 215 void kvm_set_pfn_dirty(pfn_t pfn); 216 void kvm_set_pfn_accessed(pfn_t pfn); 217 void kvm_get_pfn(pfn_t pfn); 218 219 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, 220 int len); 221 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, 222 unsigned long len); 223 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); 224 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, 225 int offset, int len); 226 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, 227 unsigned long len); 228 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); 229 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); 230 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); 231 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); 232 void mark_page_dirty(struct kvm *kvm, gfn_t gfn); 233 234 void kvm_vcpu_block(struct kvm_vcpu *vcpu); 235 void kvm_resched(struct kvm_vcpu *vcpu); 236 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); 237 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); 238 void kvm_flush_remote_tlbs(struct kvm *kvm); 239 void kvm_reload_remote_mmus(struct kvm *kvm); 240 241 long kvm_arch_dev_ioctl(struct file *filp, 242 unsigned int ioctl, unsigned long arg); 243 long kvm_arch_vcpu_ioctl(struct file *filp, 244 unsigned int ioctl, unsigned long arg); 245 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 246 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 247 248 int kvm_dev_ioctl_check_extension(long ext); 249 250 int kvm_get_dirty_log(struct kvm *kvm, 251 struct kvm_dirty_log *log, int *is_dirty); 252 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, 253 struct kvm_dirty_log *log); 254 255 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, 256 struct 257 kvm_userspace_memory_region *mem, 258 int user_alloc); 259 long kvm_arch_vm_ioctl(struct file *filp, 260 unsigned int ioctl, unsigned long arg); 261 262 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 263 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 264 265 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 266 struct kvm_translation *tr); 267 268 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 269 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 270 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 271 struct kvm_sregs *sregs); 272 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 273 struct kvm_sregs *sregs); 274 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 275 struct kvm_mp_state *mp_state); 276 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 277 struct kvm_mp_state *mp_state); 278 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, 279 struct kvm_guest_debug *dbg); 280 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); 281 282 int kvm_arch_init(void *opaque); 283 void kvm_arch_exit(void); 284 285 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); 286 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); 287 288 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); 289 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 290 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 291 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); 292 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); 293 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); 294 295 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu); 296 void kvm_arch_hardware_enable(void *garbage); 297 void kvm_arch_hardware_disable(void *garbage); 298 int kvm_arch_hardware_setup(void); 299 void kvm_arch_hardware_unsetup(void); 300 void kvm_arch_check_processor_compat(void *rtn); 301 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); 302 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu); 303 304 void kvm_free_physmem(struct kvm *kvm); 305 306 struct kvm *kvm_arch_create_vm(void); 307 void kvm_arch_destroy_vm(struct kvm *kvm); 308 void kvm_free_all_assigned_devices(struct kvm *kvm); 309 void kvm_arch_sync_events(struct kvm *kvm); 310 311 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 312 int kvm_cpu_has_interrupt(struct kvm_vcpu *v); 313 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); 314 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 315 316 int kvm_is_mmio_pfn(pfn_t pfn); 317 318 struct kvm_irq_ack_notifier { 319 struct hlist_node link; 320 unsigned gsi; 321 void (*irq_acked)(struct kvm_irq_ack_notifier *kian); 322 }; 323 324 #define KVM_ASSIGNED_MSIX_PENDING 0x1 325 struct kvm_guest_msix_entry { 326 u32 vector; 327 u16 entry; 328 u16 flags; 329 }; 330 331 struct kvm_assigned_dev_kernel { 332 struct kvm_irq_ack_notifier ack_notifier; 333 struct work_struct interrupt_work; 334 struct list_head list; 335 int assigned_dev_id; 336 int host_busnr; 337 int host_devfn; 338 unsigned int entries_nr; 339 int host_irq; 340 bool host_irq_disabled; 341 struct msix_entry *host_msix_entries; 342 int guest_irq; 343 struct kvm_guest_msix_entry *guest_msix_entries; 344 unsigned long irq_requested_type; 345 int irq_source_id; 346 int flags; 347 struct pci_dev *dev; 348 struct kvm *kvm; 349 spinlock_t assigned_dev_lock; 350 }; 351 352 struct kvm_irq_mask_notifier { 353 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked); 354 int irq; 355 struct hlist_node link; 356 }; 357 358 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, 359 struct kvm_irq_mask_notifier *kimn); 360 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, 361 struct kvm_irq_mask_notifier *kimn); 362 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask); 363 364 int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level); 365 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin); 366 void kvm_register_irq_ack_notifier(struct kvm *kvm, 367 struct kvm_irq_ack_notifier *kian); 368 void kvm_unregister_irq_ack_notifier(struct kvm_irq_ack_notifier *kian); 369 int kvm_request_irq_source_id(struct kvm *kvm); 370 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id); 371 372 /* For vcpu->arch.iommu_flags */ 373 #define KVM_IOMMU_CACHE_COHERENCY 0x1 374 375 #ifdef CONFIG_IOMMU_API 376 int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn, 377 unsigned long npages); 378 int kvm_iommu_map_guest(struct kvm *kvm); 379 int kvm_iommu_unmap_guest(struct kvm *kvm); 380 int kvm_assign_device(struct kvm *kvm, 381 struct kvm_assigned_dev_kernel *assigned_dev); 382 int kvm_deassign_device(struct kvm *kvm, 383 struct kvm_assigned_dev_kernel *assigned_dev); 384 #else /* CONFIG_IOMMU_API */ 385 static inline int kvm_iommu_map_pages(struct kvm *kvm, 386 gfn_t base_gfn, 387 unsigned long npages) 388 { 389 return 0; 390 } 391 392 static inline int kvm_iommu_map_guest(struct kvm *kvm) 393 { 394 return -ENODEV; 395 } 396 397 static inline int kvm_iommu_unmap_guest(struct kvm *kvm) 398 { 399 return 0; 400 } 401 402 static inline int kvm_assign_device(struct kvm *kvm, 403 struct kvm_assigned_dev_kernel *assigned_dev) 404 { 405 return 0; 406 } 407 408 static inline int kvm_deassign_device(struct kvm *kvm, 409 struct kvm_assigned_dev_kernel *assigned_dev) 410 { 411 return 0; 412 } 413 #endif /* CONFIG_IOMMU_API */ 414 415 static inline void kvm_guest_enter(void) 416 { 417 account_system_vtime(current); 418 current->flags |= PF_VCPU; 419 } 420 421 static inline void kvm_guest_exit(void) 422 { 423 account_system_vtime(current); 424 current->flags &= ~PF_VCPU; 425 } 426 427 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot) 428 { 429 return slot - kvm->memslots; 430 } 431 432 static inline gpa_t gfn_to_gpa(gfn_t gfn) 433 { 434 return (gpa_t)gfn << PAGE_SHIFT; 435 } 436 437 static inline hpa_t pfn_to_hpa(pfn_t pfn) 438 { 439 return (hpa_t)pfn << PAGE_SHIFT; 440 } 441 442 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) 443 { 444 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); 445 } 446 447 enum kvm_stat_kind { 448 KVM_STAT_VM, 449 KVM_STAT_VCPU, 450 }; 451 452 struct kvm_stats_debugfs_item { 453 const char *name; 454 int offset; 455 enum kvm_stat_kind kind; 456 struct dentry *dentry; 457 }; 458 extern struct kvm_stats_debugfs_item debugfs_entries[]; 459 extern struct dentry *kvm_debugfs_dir; 460 461 #define KVMTRACE_5D(evt, vcpu, d1, d2, d3, d4, d5, name) \ 462 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 463 vcpu, 5, d1, d2, d3, d4, d5) 464 #define KVMTRACE_4D(evt, vcpu, d1, d2, d3, d4, name) \ 465 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 466 vcpu, 4, d1, d2, d3, d4, 0) 467 #define KVMTRACE_3D(evt, vcpu, d1, d2, d3, name) \ 468 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 469 vcpu, 3, d1, d2, d3, 0, 0) 470 #define KVMTRACE_2D(evt, vcpu, d1, d2, name) \ 471 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 472 vcpu, 2, d1, d2, 0, 0, 0) 473 #define KVMTRACE_1D(evt, vcpu, d1, name) \ 474 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 475 vcpu, 1, d1, 0, 0, 0, 0) 476 #define KVMTRACE_0D(evt, vcpu, name) \ 477 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 478 vcpu, 0, 0, 0, 0, 0, 0) 479 480 #ifdef CONFIG_KVM_TRACE 481 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg); 482 void kvm_trace_cleanup(void); 483 #else 484 static inline 485 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg) 486 { 487 return -EINVAL; 488 } 489 #define kvm_trace_cleanup() ((void)0) 490 #endif 491 492 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 493 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq) 494 { 495 if (unlikely(vcpu->kvm->mmu_notifier_count)) 496 return 1; 497 /* 498 * Both reads happen under the mmu_lock and both values are 499 * modified under mmu_lock, so there's no need of smb_rmb() 500 * here in between, otherwise mmu_notifier_count should be 501 * read before mmu_notifier_seq, see 502 * mmu_notifier_invalidate_range_end write side. 503 */ 504 if (vcpu->kvm->mmu_notifier_seq != mmu_seq) 505 return 1; 506 return 0; 507 } 508 #endif 509 510 #ifdef CONFIG_HAVE_KVM_IRQCHIP 511 512 #define KVM_MAX_IRQ_ROUTES 1024 513 514 int kvm_setup_default_irq_routing(struct kvm *kvm); 515 int kvm_set_irq_routing(struct kvm *kvm, 516 const struct kvm_irq_routing_entry *entries, 517 unsigned nr, 518 unsigned flags); 519 void kvm_free_irq_routing(struct kvm *kvm); 520 521 #else 522 523 static inline void kvm_free_irq_routing(struct kvm *kvm) {} 524 525 #endif 526 527 #endif 528