include/linux/kvm_host.h

   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
  42 #define KVM_USERSPACE_IRQ_SOURCE_ID     0
  43
  44 struct kvm_vcpu;
  45 extern struct kmem_cache *kvm_vcpu_cache;
  46
  47 /*
  48  * It would be nice to use something smarter than a linear search, TBD...
  49  * Thankfully we dont expect many devices to register (famous last words :),
  50  * so until then it will suffice.  At least its abstracted so we can change
  51  * in one place.
  52  */
  53 struct kvm_io_bus {
  54         int                   dev_count;
  55 #define NR_IOBUS_DEVS 6
  56         struct kvm_io_device *devs[NR_IOBUS_DEVS];
  57 };
  58
  59 void kvm_io_bus_init(struct kvm_io_bus *bus);
  60 void kvm_io_bus_destroy(struct kvm_io_bus *bus);
  61 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus,
  62                                           gpa_t addr, int len, int is_write);
  63 void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
  64                              struct kvm_io_device *dev);
  65
  66 struct kvm_vcpu {
  67         struct kvm *kvm;
  68 #ifdef CONFIG_PREEMPT_NOTIFIERS
  69         struct preempt_notifier preempt_notifier;
  70 #endif
  71         int vcpu_id;
  72         struct mutex mutex;
  73         int   cpu;
  74         struct kvm_run *run;
  75         int guest_mode;
  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         struct rw_semaphore slots_lock;
 129         struct mm_struct *mm; /* userspace tied to this vm */
 130         int nmemslots;
 131         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
 132                                         KVM_PRIVATE_MEM_SLOTS];
 133         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 134         struct list_head vm_list;
 135         struct kvm_io_bus mmio_bus;
 136         struct kvm_io_bus pio_bus;
 137         struct kvm_vm_stat stat;
 138         struct kvm_arch arch;
 139         atomic_t users_count;
 140 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 141         struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
 142         struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 143 #endif
 144
 145 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 146         struct list_head irq_routing; /* of kvm_kernel_irq_routing_entry */
 147         struct hlist_head mask_notifier_list;
 148 #endif
 149
 150 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 151         struct mmu_notifier mmu_notifier;
 152         unsigned long mmu_notifier_seq;
 153         long mmu_notifier_count;
 154 #endif
 155 };
 156
 157 /* The guest did something we don't support. */
 158 #define pr_unimpl(vcpu, fmt, ...)                                       \
 159  do {                                                                   \
 160         if (printk_ratelimit())                                         \
 161                 printk(KERN_ERR "kvm: %i: cpu%i " fmt,                  \
 162                        current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
 163  } while (0)
 164
 165 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 166 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 167
 168 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 169 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 170
 171 void vcpu_load(struct kvm_vcpu *vcpu);
 172 void vcpu_put(struct kvm_vcpu *vcpu);
 173
 174 int kvm_init(void *opaque, unsigned int vcpu_size,
 175                   struct module *module);
 176 void kvm_exit(void);
 177
 178 void kvm_get_kvm(struct kvm *kvm);
 179 void kvm_put_kvm(struct kvm *kvm);
 180
 181 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 182 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 183 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 184 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
 185
 186 extern struct page *bad_page;
 187 extern pfn_t bad_pfn;
 188
 189 int is_error_page(struct page *page);
 190 int is_error_pfn(pfn_t pfn);
 191 int kvm_is_error_hva(unsigned long addr);
 192 int kvm_set_memory_region(struct kvm *kvm,
 193                           struct kvm_userspace_memory_region *mem,
 194                           int user_alloc);
 195 int __kvm_set_memory_region(struct kvm *kvm,
 196                             struct kvm_userspace_memory_region *mem,
 197                             int user_alloc);
 198 int kvm_arch_set_memory_region(struct kvm *kvm,
 199                                 struct kvm_userspace_memory_region *mem,
 200                                 struct kvm_memory_slot old,
 201                                 int user_alloc);
 202 void kvm_arch_flush_shadow(struct kvm *kvm);
 203 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
 204 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 205 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 206 void kvm_release_page_clean(struct page *page);
 207 void kvm_release_page_dirty(struct page *page);
 208 void kvm_set_page_dirty(struct page *page);
 209 void kvm_set_page_accessed(struct page *page);
 210
 211 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 212 void kvm_release_pfn_dirty(pfn_t);
 213 void kvm_release_pfn_clean(pfn_t pfn);
 214 void kvm_set_pfn_dirty(pfn_t pfn);
 215 void kvm_set_pfn_accessed(pfn_t pfn);
 216 void kvm_get_pfn(pfn_t pfn);
 217
 218 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 219                         int len);
 220 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 221                           unsigned long len);
 222 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 223 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 224                          int offset, int len);
 225 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 226                     unsigned long len);
 227 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 228 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 229 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 230 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 231 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 232
 233 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 234 void kvm_resched(struct kvm_vcpu *vcpu);
 235 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 236 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 237 void kvm_flush_remote_tlbs(struct kvm *kvm);
 238 void kvm_reload_remote_mmus(struct kvm *kvm);
 239
 240 long kvm_arch_dev_ioctl(struct file *filp,
 241                         unsigned int ioctl, unsigned long arg);
 242 long kvm_arch_vcpu_ioctl(struct file *filp,
 243                          unsigned int ioctl, unsigned long arg);
 244 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 245 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 246
 247 int kvm_dev_ioctl_check_extension(long ext);
 248
 249 int kvm_get_dirty_log(struct kvm *kvm,
 250                         struct kvm_dirty_log *log, int *is_dirty);
 251 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 252                                 struct kvm_dirty_log *log);
 253
 254 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 255                                    struct
 256                                    kvm_userspace_memory_region *mem,
 257                                    int user_alloc);
 258 long kvm_arch_vm_ioctl(struct file *filp,
 259                        unsigned int ioctl, unsigned long arg);
 260
 261 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 262 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 263
 264 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 265                                     struct kvm_translation *tr);
 266
 267 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 268 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 269 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 270                                   struct kvm_sregs *sregs);
 271 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 272                                   struct kvm_sregs *sregs);
 273 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 274                                     struct kvm_mp_state *mp_state);
 275 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 276                                     struct kvm_mp_state *mp_state);
 277 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 278                                         struct kvm_guest_debug *dbg);
 279 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 280
 281 int kvm_arch_init(void *opaque);
 282 void kvm_arch_exit(void);
 283
 284 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 285 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 286
 287 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 288 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 289 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 290 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 291 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 292 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 293
 294 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 295 void kvm_arch_hardware_enable(void *garbage);
 296 void kvm_arch_hardware_disable(void *garbage);
 297 int kvm_arch_hardware_setup(void);
 298 void kvm_arch_hardware_unsetup(void);
 299 void kvm_arch_check_processor_compat(void *rtn);
 300 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 301
 302 void kvm_free_physmem(struct kvm *kvm);
 303
 304 struct  kvm *kvm_arch_create_vm(void);
 305 void kvm_arch_destroy_vm(struct kvm *kvm);
 306 void kvm_free_all_assigned_devices(struct kvm *kvm);
 307 void kvm_arch_sync_events(struct kvm *kvm);
 308
 309 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
 310 int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
 311 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 312 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 313
 314 int kvm_is_mmio_pfn(pfn_t pfn);
 315
 316 struct kvm_irq_ack_notifier {
 317         struct hlist_node link;
 318         unsigned gsi;
 319         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 320 };
 321
 322 struct kvm_assigned_dev_kernel {
 323         struct kvm_irq_ack_notifier ack_notifier;
 324         struct work_struct interrupt_work;
 325         struct list_head list;
 326         int assigned_dev_id;
 327         int host_busnr;
 328         int host_devfn;
 329         int host_irq;
 330         bool host_irq_disabled;
 331         int guest_irq;
 332 #define KVM_ASSIGNED_DEV_GUEST_INTX     (1 << 0)
 333 #define KVM_ASSIGNED_DEV_GUEST_MSI      (1 << 1)
 334 #define KVM_ASSIGNED_DEV_HOST_INTX      (1 << 8)
 335 #define KVM_ASSIGNED_DEV_HOST_MSI       (1 << 9)
 336         unsigned long irq_requested_type;
 337         int irq_source_id;
 338         int flags;
 339         struct pci_dev *dev;
 340         struct kvm *kvm;
 341 };
 342
 343 struct kvm_irq_mask_notifier {
 344         void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
 345         int irq;
 346         struct hlist_node link;
 347 };
 348
 349 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 350                                     struct kvm_irq_mask_notifier *kimn);
 351 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 352                                       struct kvm_irq_mask_notifier *kimn);
 353 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
 354
 355 int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level);
 356 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 357 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 358                                    struct kvm_irq_ack_notifier *kian);
 359 void kvm_unregister_irq_ack_notifier(struct kvm_irq_ack_notifier *kian);
 360 int kvm_request_irq_source_id(struct kvm *kvm);
 361 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 362
 363 #ifdef CONFIG_IOMMU_API
 364 int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn,
 365                         unsigned long npages);
 366 int kvm_iommu_map_guest(struct kvm *kvm);
 367 int kvm_iommu_unmap_guest(struct kvm *kvm);
 368 int kvm_assign_device(struct kvm *kvm,
 369                       struct kvm_assigned_dev_kernel *assigned_dev);
 370 int kvm_deassign_device(struct kvm *kvm,
 371                         struct kvm_assigned_dev_kernel *assigned_dev);
 372 #else /* CONFIG_IOMMU_API */
 373 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 374                                       gfn_t base_gfn,
 375                                       unsigned long npages)
 376 {
 377         return 0;
 378 }
 379
 380 static inline int kvm_iommu_map_guest(struct kvm *kvm)
 381 {
 382         return -ENODEV;
 383 }
 384
 385 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 386 {
 387         return 0;
 388 }
 389
 390 static inline int kvm_assign_device(struct kvm *kvm,
 391                 struct kvm_assigned_dev_kernel *assigned_dev)
 392 {
 393         return 0;
 394 }
 395
 396 static inline int kvm_deassign_device(struct kvm *kvm,
 397                 struct kvm_assigned_dev_kernel *assigned_dev)
 398 {
 399         return 0;
 400 }
 401 #endif /* CONFIG_IOMMU_API */
 402
 403 static inline void kvm_guest_enter(void)
 404 {
 405         account_system_vtime(current);
 406         current->flags |= PF_VCPU;
 407 }
 408
 409 static inline void kvm_guest_exit(void)
 410 {
 411         account_system_vtime(current);
 412         current->flags &= ~PF_VCPU;
 413 }
 414
 415 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
 416 {
 417         return slot - kvm->memslots;
 418 }
 419
 420 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 421 {
 422         return (gpa_t)gfn << PAGE_SHIFT;
 423 }
 424
 425 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 426 {
 427         return (hpa_t)pfn << PAGE_SHIFT;
 428 }
 429
 430 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 431 {
 432         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 433 }
 434
 435 enum kvm_stat_kind {
 436         KVM_STAT_VM,
 437         KVM_STAT_VCPU,
 438 };
 439
 440 struct kvm_stats_debugfs_item {
 441         const char *name;
 442         int offset;
 443         enum kvm_stat_kind kind;
 444         struct dentry *dentry;
 445 };
 446 extern struct kvm_stats_debugfs_item debugfs_entries[];
 447 extern struct dentry *kvm_debugfs_dir;
 448
 449 #define KVMTRACE_5D(evt, vcpu, d1, d2, d3, d4, d5, name) \
 450         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 451                                                 vcpu, 5, d1, d2, d3, d4, d5)
 452 #define KVMTRACE_4D(evt, vcpu, d1, d2, d3, d4, name) \
 453         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 454                                                 vcpu, 4, d1, d2, d3, d4, 0)
 455 #define KVMTRACE_3D(evt, vcpu, d1, d2, d3, name) \
 456         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 457                                                 vcpu, 3, d1, d2, d3, 0, 0)
 458 #define KVMTRACE_2D(evt, vcpu, d1, d2, name) \
 459         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 460                                                 vcpu, 2, d1, d2, 0, 0, 0)
 461 #define KVMTRACE_1D(evt, vcpu, d1, name) \
 462         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 463                                                 vcpu, 1, d1, 0, 0, 0, 0)
 464 #define KVMTRACE_0D(evt, vcpu, name) \
 465         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 466                                                 vcpu, 0, 0, 0, 0, 0, 0)
 467
 468 #ifdef CONFIG_KVM_TRACE
 469 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg);
 470 void kvm_trace_cleanup(void);
 471 #else
 472 static inline
 473 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg)
 474 {
 475         return -EINVAL;
 476 }
 477 #define kvm_trace_cleanup() ((void)0)
 478 #endif
 479
 480 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 481 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
 482 {
 483         if (unlikely(vcpu->kvm->mmu_notifier_count))
 484                 return 1;
 485         /*
 486          * Both reads happen under the mmu_lock and both values are
 487          * modified under mmu_lock, so there's no need of smb_rmb()
 488          * here in between, otherwise mmu_notifier_count should be
 489          * read before mmu_notifier_seq, see
 490          * mmu_notifier_invalidate_range_end write side.
 491          */
 492         if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
 493                 return 1;
 494         return 0;
 495 }
 496 #endif
 497
 498 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 499
 500 #define KVM_MAX_IRQ_ROUTES 1024
 501
 502 int kvm_setup_default_irq_routing(struct kvm *kvm);
 503 int kvm_set_irq_routing(struct kvm *kvm,
 504                         const struct kvm_irq_routing_entry *entries,
 505                         unsigned nr,
 506                         unsigned flags);
 507 void kvm_free_irq_routing(struct kvm *kvm);
 508
 509 #else
 510
 511 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 512
 513 #endif
 514
 515 #endif