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 <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 40 #define KVM_USERSPACE_IRQ_SOURCE_ID 0 41 42 struct kvm_vcpu; 43 extern struct kmem_cache *kvm_vcpu_cache; 44 45 /* 46 * It would be nice to use something smarter than a linear search, TBD... 47 * Thankfully we dont expect many devices to register (famous last words :), 48 * so until then it will suffice. At least its abstracted so we can change 49 * in one place. 50 */ 51 struct kvm_io_bus { 52 int dev_count; 53 #define NR_IOBUS_DEVS 6 54 struct kvm_io_device *devs[NR_IOBUS_DEVS]; 55 }; 56 57 void kvm_io_bus_init(struct kvm_io_bus *bus); 58 void kvm_io_bus_destroy(struct kvm_io_bus *bus); 59 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, 60 gpa_t addr, int len, int is_write); 61 void kvm_io_bus_register_dev(struct kvm_io_bus *bus, 62 struct kvm_io_device *dev); 63 64 struct kvm_vcpu { 65 struct kvm *kvm; 66 #ifdef CONFIG_PREEMPT_NOTIFIERS 67 struct preempt_notifier preempt_notifier; 68 #endif 69 int vcpu_id; 70 struct mutex mutex; 71 int cpu; 72 struct kvm_run *run; 73 int guest_mode; 74 unsigned long requests; 75 struct kvm_guest_debug guest_debug; 76 int fpu_active; 77 int guest_fpu_loaded; 78 wait_queue_head_t wq; 79 int sigset_active; 80 sigset_t sigset; 81 struct kvm_vcpu_stat stat; 82 83 #ifdef CONFIG_HAS_IOMEM 84 int mmio_needed; 85 int mmio_read_completed; 86 int mmio_is_write; 87 int mmio_size; 88 unsigned char mmio_data[8]; 89 gpa_t mmio_phys_addr; 90 #endif 91 92 struct kvm_vcpu_arch arch; 93 }; 94 95 struct kvm_memory_slot { 96 gfn_t base_gfn; 97 unsigned long npages; 98 unsigned long flags; 99 unsigned long *rmap; 100 unsigned long *dirty_bitmap; 101 struct { 102 unsigned long rmap_pde; 103 int write_count; 104 } *lpage_info; 105 unsigned long userspace_addr; 106 int user_alloc; 107 }; 108 109 struct kvm { 110 struct mutex lock; /* protects the vcpus array and APIC accesses */ 111 spinlock_t mmu_lock; 112 struct rw_semaphore slots_lock; 113 struct mm_struct *mm; /* userspace tied to this vm */ 114 int nmemslots; 115 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS + 116 KVM_PRIVATE_MEM_SLOTS]; 117 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; 118 struct list_head vm_list; 119 struct kvm_io_bus mmio_bus; 120 struct kvm_io_bus pio_bus; 121 struct kvm_vm_stat stat; 122 struct kvm_arch arch; 123 atomic_t users_count; 124 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET 125 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev; 126 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; 127 #endif 128 129 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 130 struct mmu_notifier mmu_notifier; 131 unsigned long mmu_notifier_seq; 132 long mmu_notifier_count; 133 #endif 134 }; 135 136 /* The guest did something we don't support. */ 137 #define pr_unimpl(vcpu, fmt, ...) \ 138 do { \ 139 if (printk_ratelimit()) \ 140 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \ 141 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \ 142 } while (0) 143 144 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt) 145 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt) 146 147 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); 148 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); 149 150 void vcpu_load(struct kvm_vcpu *vcpu); 151 void vcpu_put(struct kvm_vcpu *vcpu); 152 153 int kvm_init(void *opaque, unsigned int vcpu_size, 154 struct module *module); 155 void kvm_exit(void); 156 157 void kvm_get_kvm(struct kvm *kvm); 158 void kvm_put_kvm(struct kvm *kvm); 159 160 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1) 161 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB) 162 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; } 163 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva); 164 165 extern struct page *bad_page; 166 extern pfn_t bad_pfn; 167 168 int is_error_page(struct page *page); 169 int is_error_pfn(pfn_t pfn); 170 int kvm_is_error_hva(unsigned long addr); 171 int kvm_set_memory_region(struct kvm *kvm, 172 struct kvm_userspace_memory_region *mem, 173 int user_alloc); 174 int __kvm_set_memory_region(struct kvm *kvm, 175 struct kvm_userspace_memory_region *mem, 176 int user_alloc); 177 int kvm_arch_set_memory_region(struct kvm *kvm, 178 struct kvm_userspace_memory_region *mem, 179 struct kvm_memory_slot old, 180 int user_alloc); 181 void kvm_arch_flush_shadow(struct kvm *kvm); 182 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn); 183 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); 184 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); 185 void kvm_release_page_clean(struct page *page); 186 void kvm_release_page_dirty(struct page *page); 187 void kvm_set_page_dirty(struct page *page); 188 void kvm_set_page_accessed(struct page *page); 189 190 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); 191 void kvm_release_pfn_dirty(pfn_t); 192 void kvm_release_pfn_clean(pfn_t pfn); 193 void kvm_set_pfn_dirty(pfn_t pfn); 194 void kvm_set_pfn_accessed(pfn_t pfn); 195 void kvm_get_pfn(pfn_t pfn); 196 197 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, 198 int len); 199 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, 200 unsigned long len); 201 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); 202 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, 203 int offset, int len); 204 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, 205 unsigned long len); 206 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); 207 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); 208 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); 209 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); 210 void mark_page_dirty(struct kvm *kvm, gfn_t gfn); 211 212 void kvm_vcpu_block(struct kvm_vcpu *vcpu); 213 void kvm_resched(struct kvm_vcpu *vcpu); 214 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); 215 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); 216 void kvm_flush_remote_tlbs(struct kvm *kvm); 217 void kvm_reload_remote_mmus(struct kvm *kvm); 218 219 long kvm_arch_dev_ioctl(struct file *filp, 220 unsigned int ioctl, unsigned long arg); 221 long kvm_arch_vcpu_ioctl(struct file *filp, 222 unsigned int ioctl, unsigned long arg); 223 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 224 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 225 226 int kvm_dev_ioctl_check_extension(long ext); 227 228 int kvm_get_dirty_log(struct kvm *kvm, 229 struct kvm_dirty_log *log, int *is_dirty); 230 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, 231 struct kvm_dirty_log *log); 232 233 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, 234 struct 235 kvm_userspace_memory_region *mem, 236 int user_alloc); 237 long kvm_arch_vm_ioctl(struct file *filp, 238 unsigned int ioctl, unsigned long arg); 239 void kvm_arch_destroy_vm(struct kvm *kvm); 240 241 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 242 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 243 244 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 245 struct kvm_translation *tr); 246 247 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 248 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 249 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 250 struct kvm_sregs *sregs); 251 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 252 struct kvm_sregs *sregs); 253 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 254 struct kvm_mp_state *mp_state); 255 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 256 struct kvm_mp_state *mp_state); 257 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, 258 struct kvm_debug_guest *dbg); 259 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); 260 261 int kvm_arch_init(void *opaque); 262 void kvm_arch_exit(void); 263 264 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); 265 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); 266 267 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); 268 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 269 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 270 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); 271 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); 272 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); 273 274 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu); 275 void kvm_arch_hardware_enable(void *garbage); 276 void kvm_arch_hardware_disable(void *garbage); 277 int kvm_arch_hardware_setup(void); 278 void kvm_arch_hardware_unsetup(void); 279 void kvm_arch_check_processor_compat(void *rtn); 280 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); 281 282 void kvm_free_physmem(struct kvm *kvm); 283 284 struct kvm *kvm_arch_create_vm(void); 285 void kvm_arch_destroy_vm(struct kvm *kvm); 286 void kvm_free_all_assigned_devices(struct kvm *kvm); 287 288 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 289 int kvm_cpu_has_interrupt(struct kvm_vcpu *v); 290 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); 291 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 292 293 int kvm_is_mmio_pfn(pfn_t pfn); 294 295 struct kvm_irq_ack_notifier { 296 struct hlist_node link; 297 unsigned gsi; 298 void (*irq_acked)(struct kvm_irq_ack_notifier *kian); 299 }; 300 301 struct kvm_assigned_dev_kernel { 302 struct kvm_irq_ack_notifier ack_notifier; 303 struct work_struct interrupt_work; 304 struct list_head list; 305 int assigned_dev_id; 306 int host_busnr; 307 int host_devfn; 308 int host_irq; 309 int guest_irq; 310 int irq_requested; 311 int irq_source_id; 312 struct pci_dev *dev; 313 struct kvm *kvm; 314 }; 315 void kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level); 316 void kvm_notify_acked_irq(struct kvm *kvm, unsigned gsi); 317 void kvm_register_irq_ack_notifier(struct kvm *kvm, 318 struct kvm_irq_ack_notifier *kian); 319 void kvm_unregister_irq_ack_notifier(struct kvm *kvm, 320 struct kvm_irq_ack_notifier *kian); 321 int kvm_request_irq_source_id(struct kvm *kvm); 322 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id); 323 324 #ifdef CONFIG_DMAR 325 int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn, 326 unsigned long npages); 327 int kvm_iommu_map_guest(struct kvm *kvm, 328 struct kvm_assigned_dev_kernel *assigned_dev); 329 int kvm_iommu_unmap_guest(struct kvm *kvm); 330 #else /* CONFIG_DMAR */ 331 static inline int kvm_iommu_map_pages(struct kvm *kvm, 332 gfn_t base_gfn, 333 unsigned long npages) 334 { 335 return 0; 336 } 337 338 static inline int kvm_iommu_map_guest(struct kvm *kvm, 339 struct kvm_assigned_dev_kernel 340 *assigned_dev) 341 { 342 return -ENODEV; 343 } 344 345 static inline int kvm_iommu_unmap_guest(struct kvm *kvm) 346 { 347 return 0; 348 } 349 #endif /* CONFIG_DMAR */ 350 351 static inline void kvm_guest_enter(void) 352 { 353 account_system_vtime(current); 354 current->flags |= PF_VCPU; 355 } 356 357 static inline void kvm_guest_exit(void) 358 { 359 account_system_vtime(current); 360 current->flags &= ~PF_VCPU; 361 } 362 363 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot) 364 { 365 return slot - kvm->memslots; 366 } 367 368 static inline gpa_t gfn_to_gpa(gfn_t gfn) 369 { 370 return (gpa_t)gfn << PAGE_SHIFT; 371 } 372 373 static inline hpa_t pfn_to_hpa(pfn_t pfn) 374 { 375 return (hpa_t)pfn << PAGE_SHIFT; 376 } 377 378 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) 379 { 380 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); 381 } 382 383 enum kvm_stat_kind { 384 KVM_STAT_VM, 385 KVM_STAT_VCPU, 386 }; 387 388 struct kvm_stats_debugfs_item { 389 const char *name; 390 int offset; 391 enum kvm_stat_kind kind; 392 struct dentry *dentry; 393 }; 394 extern struct kvm_stats_debugfs_item debugfs_entries[]; 395 extern struct dentry *kvm_debugfs_dir; 396 397 #define KVMTRACE_5D(evt, vcpu, d1, d2, d3, d4, d5, name) \ 398 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 399 vcpu, 5, d1, d2, d3, d4, d5) 400 #define KVMTRACE_4D(evt, vcpu, d1, d2, d3, d4, name) \ 401 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 402 vcpu, 4, d1, d2, d3, d4, 0) 403 #define KVMTRACE_3D(evt, vcpu, d1, d2, d3, name) \ 404 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 405 vcpu, 3, d1, d2, d3, 0, 0) 406 #define KVMTRACE_2D(evt, vcpu, d1, d2, name) \ 407 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 408 vcpu, 2, d1, d2, 0, 0, 0) 409 #define KVMTRACE_1D(evt, vcpu, d1, name) \ 410 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 411 vcpu, 1, d1, 0, 0, 0, 0) 412 #define KVMTRACE_0D(evt, vcpu, name) \ 413 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 414 vcpu, 0, 0, 0, 0, 0, 0) 415 416 #ifdef CONFIG_KVM_TRACE 417 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg); 418 void kvm_trace_cleanup(void); 419 #else 420 static inline 421 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg) 422 { 423 return -EINVAL; 424 } 425 #define kvm_trace_cleanup() ((void)0) 426 #endif 427 428 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 429 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq) 430 { 431 if (unlikely(vcpu->kvm->mmu_notifier_count)) 432 return 1; 433 /* 434 * Both reads happen under the mmu_lock and both values are 435 * modified under mmu_lock, so there's no need of smb_rmb() 436 * here in between, otherwise mmu_notifier_count should be 437 * read before mmu_notifier_seq, see 438 * mmu_notifier_invalidate_range_end write side. 439 */ 440 if (vcpu->kvm->mmu_notifier_seq != mmu_seq) 441 return 1; 442 return 0; 443 } 444 #endif 445 446 #endif 447