release/src-rt-6.x.4708/linux/linux-2.6.36/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/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 #define KVM_REQ_DEACTIVATE_FPU    10
  42
  43 #define KVM_USERSPACE_IRQ_SOURCE_ID     0
  44
  45 struct kvm;
  46 struct kvm_vcpu;
  47 extern struct kmem_cache *kvm_vcpu_cache;
  48
  49 /*
  50  * It would be nice to use something smarter than a linear search, TBD...
  51  * Thankfully we dont expect many devices to register (famous last words :),
  52  * so until then it will suffice.  At least its abstracted so we can change
  53  * in one place.
  54  */
  55 struct kvm_io_bus {
  56         int                   dev_count;
  57 #define NR_IOBUS_DEVS 200
  58         struct kvm_io_device *devs[NR_IOBUS_DEVS];
  59 };
  60
  61 enum kvm_bus {
  62         KVM_MMIO_BUS,
  63         KVM_PIO_BUS,
  64         KVM_NR_BUSES
  65 };
  66
  67 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
  68                      int len, const void *val);
  69 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
  70                     void *val);
  71 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx,
  72                             struct kvm_io_device *dev);
  73 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
  74                               struct kvm_io_device *dev);
  75
  76 struct kvm_vcpu {
  77         struct kvm *kvm;
  78 #ifdef CONFIG_PREEMPT_NOTIFIERS
  79         struct preempt_notifier preempt_notifier;
  80 #endif
  81         int vcpu_id;
  82         struct mutex mutex;
  83         int   cpu;
  84         atomic_t guest_mode;
  85         struct kvm_run *run;
  86         unsigned long requests;
  87         unsigned long guest_debug;
  88         int srcu_idx;
  89
  90         int fpu_active;
  91         int guest_fpu_loaded, guest_xcr0_loaded;
  92         wait_queue_head_t wq;
  93         int sigset_active;
  94         sigset_t sigset;
  95         struct kvm_vcpu_stat stat;
  96
  97 #ifdef CONFIG_HAS_IOMEM
  98         int mmio_needed;
  99         int mmio_read_completed;
 100         int mmio_is_write;
 101         int mmio_size;
 102         unsigned char mmio_data[8];
 103         gpa_t mmio_phys_addr;
 104 #endif
 105
 106         struct kvm_vcpu_arch arch;
 107 };
 108
 109 /*
 110  * Some of the bitops functions do not support too long bitmaps.
 111  * This number must be determined not to exceed such limits.
 112  */
 113 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
 114
 115 struct kvm_memory_slot {
 116         gfn_t base_gfn;
 117         unsigned long npages;
 118         unsigned long flags;
 119         unsigned long *rmap;
 120         unsigned long *dirty_bitmap;
 121         struct {
 122                 unsigned long rmap_pde;
 123                 int write_count;
 124         } *lpage_info[KVM_NR_PAGE_SIZES - 1];
 125         unsigned long userspace_addr;
 126         int user_alloc;
 127         int id;
 128 };
 129
 130 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
 131 {
 132         return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
 133 }
 134
 135 struct kvm_kernel_irq_routing_entry {
 136         u32 gsi;
 137         u32 type;
 138         int (*set)(struct kvm_kernel_irq_routing_entry *e,
 139                    struct kvm *kvm, int irq_source_id, int level);
 140         union {
 141                 struct {
 142                         unsigned irqchip;
 143                         unsigned pin;
 144                 } irqchip;
 145                 struct msi_msg msi;
 146         };
 147         struct hlist_node link;
 148 };
 149
 150 #ifdef __KVM_HAVE_IOAPIC
 151
 152 struct kvm_irq_routing_table {
 153         int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
 154         struct kvm_kernel_irq_routing_entry *rt_entries;
 155         u32 nr_rt_entries;
 156         /*
 157          * Array indexed by gsi. Each entry contains list of irq chips
 158          * the gsi is connected to.
 159          */
 160         struct hlist_head map[0];
 161 };
 162
 163 #else
 164
 165 struct kvm_irq_routing_table {};
 166
 167 #endif
 168
 169 struct kvm_memslots {
 170         int nmemslots;
 171         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
 172                                         KVM_PRIVATE_MEM_SLOTS];
 173 };
 174
 175 struct kvm {
 176         spinlock_t mmu_lock;
 177         raw_spinlock_t requests_lock;
 178         struct mutex slots_lock;
 179         struct mm_struct *mm; /* userspace tied to this vm */
 180         struct kvm_memslots *memslots;
 181         struct srcu_struct srcu;
 182 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 183         u32 bsp_vcpu_id;
 184         struct kvm_vcpu *bsp_vcpu;
 185 #endif
 186         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 187         atomic_t online_vcpus;
 188         struct list_head vm_list;
 189         struct mutex lock;
 190         struct kvm_io_bus *buses[KVM_NR_BUSES];
 191 #ifdef CONFIG_HAVE_KVM_EVENTFD
 192         struct {
 193                 spinlock_t        lock;
 194                 struct list_head  items;
 195         } irqfds;
 196         struct list_head ioeventfds;
 197 #endif
 198         struct kvm_vm_stat stat;
 199         struct kvm_arch arch;
 200         atomic_t users_count;
 201 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 202         struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
 203         struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 204 #endif
 205
 206         struct mutex irq_lock;
 207 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 208         struct kvm_irq_routing_table *irq_routing;
 209         struct hlist_head mask_notifier_list;
 210         struct hlist_head irq_ack_notifier_list;
 211 #endif
 212
 213 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 214         struct mmu_notifier mmu_notifier;
 215         unsigned long mmu_notifier_seq;
 216         long mmu_notifier_count;
 217 #endif
 218 };
 219
 220 /* The guest did something we don't support. */
 221 #define pr_unimpl(vcpu, fmt, ...)                                       \
 222  do {                                                                   \
 223         if (printk_ratelimit())                                         \
 224                 printk(KERN_ERR "kvm: %i: cpu%i " fmt,                  \
 225                        current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
 226  } while (0)
 227
 228 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 229 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 230
 231 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 232 {
 233         smp_rmb();
 234         return kvm->vcpus[i];
 235 }
 236
 237 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
 238         for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \
 239              idx < atomic_read(&kvm->online_vcpus) && vcpup; \
 240              vcpup = kvm_get_vcpu(kvm, ++idx))
 241
 242 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 243 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 244
 245 void vcpu_load(struct kvm_vcpu *vcpu);
 246 void vcpu_put(struct kvm_vcpu *vcpu);
 247
 248 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
 249                   struct module *module);
 250 void kvm_exit(void);
 251
 252 void kvm_get_kvm(struct kvm *kvm);
 253 void kvm_put_kvm(struct kvm *kvm);
 254
 255 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
 256 {
 257         return rcu_dereference_check(kvm->memslots,
 258                         srcu_read_lock_held(&kvm->srcu)
 259                         || lockdep_is_held(&kvm->slots_lock));
 260 }
 261
 262 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 263 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 264 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 265
 266 extern struct page *bad_page;
 267 extern pfn_t bad_pfn;
 268
 269 int is_error_page(struct page *page);
 270 int is_error_pfn(pfn_t pfn);
 271 int is_hwpoison_pfn(pfn_t pfn);
 272 int is_fault_pfn(pfn_t pfn);
 273 int kvm_is_error_hva(unsigned long addr);
 274 int kvm_set_memory_region(struct kvm *kvm,
 275                           struct kvm_userspace_memory_region *mem,
 276                           int user_alloc);
 277 int __kvm_set_memory_region(struct kvm *kvm,
 278                             struct kvm_userspace_memory_region *mem,
 279                             int user_alloc);
 280 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 281                                 struct kvm_memory_slot *memslot,
 282                                 struct kvm_memory_slot old,
 283                                 struct kvm_userspace_memory_region *mem,
 284                                 int user_alloc);
 285 void kvm_arch_commit_memory_region(struct kvm *kvm,
 286                                 struct kvm_userspace_memory_region *mem,
 287                                 struct kvm_memory_slot old,
 288                                 int user_alloc);
 289 void kvm_disable_largepages(void);
 290 void kvm_arch_flush_shadow(struct kvm *kvm);
 291
 292 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 293 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 294 void kvm_release_page_clean(struct page *page);
 295 void kvm_release_page_dirty(struct page *page);
 296 void kvm_set_page_dirty(struct page *page);
 297 void kvm_set_page_accessed(struct page *page);
 298
 299 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 300 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
 301                          struct kvm_memory_slot *slot, gfn_t gfn);
 302 int memslot_id(struct kvm *kvm, gfn_t gfn);
 303 void kvm_release_pfn_dirty(pfn_t);
 304 void kvm_release_pfn_clean(pfn_t pfn);
 305 void kvm_set_pfn_dirty(pfn_t pfn);
 306 void kvm_set_pfn_accessed(pfn_t pfn);
 307 void kvm_get_pfn(pfn_t pfn);
 308
 309 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 310                         int len);
 311 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 312                           unsigned long len);
 313 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 314 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 315                          int offset, int len);
 316 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 317                     unsigned long len);
 318 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 319 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 320 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 321 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 322 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
 323 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 324
 325 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 326 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
 327 void kvm_resched(struct kvm_vcpu *vcpu);
 328 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 329 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 330 void kvm_flush_remote_tlbs(struct kvm *kvm);
 331 void kvm_reload_remote_mmus(struct kvm *kvm);
 332
 333 long kvm_arch_dev_ioctl(struct file *filp,
 334                         unsigned int ioctl, unsigned long arg);
 335 long kvm_arch_vcpu_ioctl(struct file *filp,
 336                          unsigned int ioctl, unsigned long arg);
 337
 338 int kvm_dev_ioctl_check_extension(long ext);
 339
 340 int kvm_get_dirty_log(struct kvm *kvm,
 341                         struct kvm_dirty_log *log, int *is_dirty);
 342 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 343                                 struct kvm_dirty_log *log);
 344
 345 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 346                                    struct
 347                                    kvm_userspace_memory_region *mem,
 348                                    int user_alloc);
 349 long kvm_arch_vm_ioctl(struct file *filp,
 350                        unsigned int ioctl, unsigned long arg);
 351
 352 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 353 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 354
 355 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 356                                     struct kvm_translation *tr);
 357
 358 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 359 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 360 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 361                                   struct kvm_sregs *sregs);
 362 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 363                                   struct kvm_sregs *sregs);
 364 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 365                                     struct kvm_mp_state *mp_state);
 366 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 367                                     struct kvm_mp_state *mp_state);
 368 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 369                                         struct kvm_guest_debug *dbg);
 370 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 371
 372 int kvm_arch_init(void *opaque);
 373 void kvm_arch_exit(void);
 374
 375 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 376 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 377
 378 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 379 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 380 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 381 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 382 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 383 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 384
 385 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 386 int kvm_arch_hardware_enable(void *garbage);
 387 void kvm_arch_hardware_disable(void *garbage);
 388 int kvm_arch_hardware_setup(void);
 389 void kvm_arch_hardware_unsetup(void);
 390 void kvm_arch_check_processor_compat(void *rtn);
 391 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 392
 393 void kvm_free_physmem(struct kvm *kvm);
 394
 395 struct  kvm *kvm_arch_create_vm(void);
 396 void kvm_arch_destroy_vm(struct kvm *kvm);
 397 void kvm_free_all_assigned_devices(struct kvm *kvm);
 398 void kvm_arch_sync_events(struct kvm *kvm);
 399
 400 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 401 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 402
 403 int kvm_is_mmio_pfn(pfn_t pfn);
 404
 405 struct kvm_irq_ack_notifier {
 406         struct hlist_node link;
 407         unsigned gsi;
 408         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 409 };
 410
 411 #define KVM_ASSIGNED_MSIX_PENDING               0x1
 412 struct kvm_guest_msix_entry {
 413         u32 vector;
 414         u16 entry;
 415         u16 flags;
 416 };
 417
 418 struct kvm_assigned_dev_kernel {
 419         struct kvm_irq_ack_notifier ack_notifier;
 420         struct work_struct interrupt_work;
 421         struct list_head list;
 422         int assigned_dev_id;
 423         int host_segnr;
 424         int host_busnr;
 425         int host_devfn;
 426         unsigned int entries_nr;
 427         int host_irq;
 428         bool host_irq_disabled;
 429         struct msix_entry *host_msix_entries;
 430         int guest_irq;
 431         struct kvm_guest_msix_entry *guest_msix_entries;
 432         unsigned long irq_requested_type;
 433         int irq_source_id;
 434         int flags;
 435         struct pci_dev *dev;
 436         struct kvm *kvm;
 437         spinlock_t assigned_dev_lock;
 438 };
 439
 440 struct kvm_irq_mask_notifier {
 441         void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
 442         int irq;
 443         struct hlist_node link;
 444 };
 445
 446 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 447                                     struct kvm_irq_mask_notifier *kimn);
 448 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 449                                       struct kvm_irq_mask_notifier *kimn);
 450 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
 451                              bool mask);
 452
 453 #ifdef __KVM_HAVE_IOAPIC
 454 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
 455                                    union kvm_ioapic_redirect_entry *entry,
 456                                    unsigned long *deliver_bitmask);
 457 #endif
 458 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
 459 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 460 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 461                                    struct kvm_irq_ack_notifier *kian);
 462 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 463                                    struct kvm_irq_ack_notifier *kian);
 464 int kvm_request_irq_source_id(struct kvm *kvm);
 465 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 466
 467 /* For vcpu->arch.iommu_flags */
 468 #define KVM_IOMMU_CACHE_COHERENCY       0x1
 469
 470 #ifdef CONFIG_IOMMU_API
 471 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 472 int kvm_iommu_map_guest(struct kvm *kvm);
 473 int kvm_iommu_unmap_guest(struct kvm *kvm);
 474 int kvm_assign_device(struct kvm *kvm,
 475                       struct kvm_assigned_dev_kernel *assigned_dev);
 476 int kvm_deassign_device(struct kvm *kvm,
 477                         struct kvm_assigned_dev_kernel *assigned_dev);
 478 #else /* CONFIG_IOMMU_API */
 479 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 480                                       gfn_t base_gfn,
 481                                       unsigned long npages)
 482 {
 483         return 0;
 484 }
 485
 486 static inline int kvm_iommu_map_guest(struct kvm *kvm)
 487 {
 488         return -ENODEV;
 489 }
 490
 491 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 492 {
 493         return 0;
 494 }
 495
 496 static inline int kvm_assign_device(struct kvm *kvm,
 497                 struct kvm_assigned_dev_kernel *assigned_dev)
 498 {
 499         return 0;
 500 }
 501
 502 static inline int kvm_deassign_device(struct kvm *kvm,
 503                 struct kvm_assigned_dev_kernel *assigned_dev)
 504 {
 505         return 0;
 506 }
 507 #endif /* CONFIG_IOMMU_API */
 508
 509 static inline void kvm_guest_enter(void)
 510 {
 511         account_system_vtime(current);
 512         current->flags |= PF_VCPU;
 513 }
 514
 515 static inline void kvm_guest_exit(void)
 516 {
 517         account_system_vtime(current);
 518         current->flags &= ~PF_VCPU;
 519 }
 520
 521 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 522 {
 523         return (gpa_t)gfn << PAGE_SHIFT;
 524 }
 525
 526 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 527 {
 528         return (hpa_t)pfn << PAGE_SHIFT;
 529 }
 530
 531 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 532 {
 533         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 534 }
 535
 536 enum kvm_stat_kind {
 537         KVM_STAT_VM,
 538         KVM_STAT_VCPU,
 539 };
 540
 541 struct kvm_stats_debugfs_item {
 542         const char *name;
 543         int offset;
 544         enum kvm_stat_kind kind;
 545         struct dentry *dentry;
 546 };
 547 extern struct kvm_stats_debugfs_item debugfs_entries[];
 548 extern struct dentry *kvm_debugfs_dir;
 549
 550 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 551 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
 552 {
 553         if (unlikely(vcpu->kvm->mmu_notifier_count))
 554                 return 1;
 555         /*
 556          * Both reads happen under the mmu_lock and both values are
 557          * modified under mmu_lock, so there's no need of smb_rmb()
 558          * here in between, otherwise mmu_notifier_count should be
 559          * read before mmu_notifier_seq, see
 560          * mmu_notifier_invalidate_range_end write side.
 561          */
 562         if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
 563                 return 1;
 564         return 0;
 565 }
 566 #endif
 567
 568 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 569
 570 #define KVM_MAX_IRQ_ROUTES 1024
 571
 572 int kvm_setup_default_irq_routing(struct kvm *kvm);
 573 int kvm_set_irq_routing(struct kvm *kvm,
 574                         const struct kvm_irq_routing_entry *entries,
 575                         unsigned nr,
 576                         unsigned flags);
 577 void kvm_free_irq_routing(struct kvm *kvm);
 578
 579 #else
 580
 581 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 582
 583 #endif
 584
 585 #ifdef CONFIG_HAVE_KVM_EVENTFD
 586
 587 void kvm_eventfd_init(struct kvm *kvm);
 588 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
 589 void kvm_irqfd_release(struct kvm *kvm);
 590 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
 591
 592 #else
 593
 594 static inline void kvm_eventfd_init(struct kvm *kvm) {}
 595 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
 596 {
 597         return -EINVAL;
 598 }
 599
 600 static inline void kvm_irqfd_release(struct kvm *kvm) {}
 601 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
 602 {
 603         return -ENOSYS;
 604 }
 605
 606 #endif /* CONFIG_HAVE_KVM_EVENTFD */
 607
 608 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 609 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
 610 {
 611         return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
 612 }
 613 #endif
 614
 615 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
 616
 617 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 618                                   unsigned long arg);
 619
 620 #else
 621
 622 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 623                                                 unsigned long arg)
 624 {
 625         return -ENOTTY;
 626 }
 627
 628 #endif
 629
 630 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
 631 {
 632         set_bit(req, &vcpu->requests);
 633 }
 634
 635 static inline bool kvm_make_check_request(int req, struct kvm_vcpu *vcpu)
 636 {
 637         return test_and_set_bit(req, &vcpu->requests);
 638 }
 639
 640 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
 641 {
 642         if (test_bit(req, &vcpu->requests)) {
 643                 clear_bit(req, &vcpu->requests);
 644                 return true;
 645         } else {
 646                 return false;
 647         }
 648 }
 649
 650 #endif