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 <linux/slab.h>
  20 #include <linux/rcupdate.h>
  21 #include <asm/signal.h>
  22
  23 #include <linux/kvm.h>
  24 #include <linux/kvm_para.h>
  25
  26 #include <linux/kvm_types.h>
  27
  28 #include <asm/kvm_host.h>
  29
  30 /*
  31  * vcpu->requests bit members
  32  */
  33 #define KVM_REQ_TLB_FLUSH          0
  34 #define KVM_REQ_MIGRATE_TIMER      1
  35 #define KVM_REQ_REPORT_TPR_ACCESS  2
  36 #define KVM_REQ_MMU_RELOAD         3
  37 #define KVM_REQ_TRIPLE_FAULT       4
  38 #define KVM_REQ_PENDING_TIMER      5
  39 #define KVM_REQ_UNHALT             6
  40 #define KVM_REQ_MMU_SYNC           7
  41 #define KVM_REQ_CLOCK_UPDATE       8
  42 #define KVM_REQ_KICK               9
  43 #define KVM_REQ_DEACTIVATE_FPU    10
  44 #define KVM_REQ_EVENT             11
  45 #define KVM_REQ_APF_HALT          12
  46 #define KVM_REQ_NMI               13
  47
  48 #define KVM_USERSPACE_IRQ_SOURCE_ID     0
  49
  50 struct kvm;
  51 struct kvm_vcpu;
  52 extern struct kmem_cache *kvm_vcpu_cache;
  53
  54 /*
  55  * It would be nice to use something smarter than a linear search, TBD...
  56  * Thankfully we dont expect many devices to register (famous last words :),
  57  * so until then it will suffice.  At least its abstracted so we can change
  58  * in one place.
  59  */
  60 struct kvm_io_bus {
  61         int                   dev_count;
  62 #define NR_IOBUS_DEVS 200
  63         struct kvm_io_device *devs[NR_IOBUS_DEVS];
  64 };
  65
  66 enum kvm_bus {
  67         KVM_MMIO_BUS,
  68         KVM_PIO_BUS,
  69         KVM_NR_BUSES
  70 };
  71
  72 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
  73                      int len, const void *val);
  74 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
  75                     void *val);
  76 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx,
  77                             struct kvm_io_device *dev);
  78 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
  79                               struct kvm_io_device *dev);
  80
  81 #ifdef CONFIG_KVM_ASYNC_PF
  82 struct kvm_async_pf {
  83         struct work_struct work;
  84         struct list_head link;
  85         struct list_head queue;
  86         struct kvm_vcpu *vcpu;
  87         struct mm_struct *mm;
  88         gva_t gva;
  89         unsigned long addr;
  90         struct kvm_arch_async_pf arch;
  91         struct page *page;
  92         bool done;
  93 };
  94
  95 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
  96 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
  97 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
  98                        struct kvm_arch_async_pf *arch);
  99 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
 100 #endif
 101
 102 enum {
 103         OUTSIDE_GUEST_MODE,
 104         IN_GUEST_MODE,
 105         EXITING_GUEST_MODE
 106 };
 107
 108 struct kvm_vcpu {
 109         struct kvm *kvm;
 110 #ifdef CONFIG_PREEMPT_NOTIFIERS
 111         struct preempt_notifier preempt_notifier;
 112 #endif
 113         int cpu;
 114         int vcpu_id;
 115         int srcu_idx;
 116         int mode;
 117         unsigned long requests;
 118         unsigned long guest_debug;
 119
 120         struct mutex mutex;
 121         struct kvm_run *run;
 122
 123         int fpu_active;
 124         int guest_fpu_loaded, guest_xcr0_loaded;
 125         wait_queue_head_t wq;
 126         struct pid *pid;
 127         int sigset_active;
 128         sigset_t sigset;
 129         struct kvm_vcpu_stat stat;
 130
 131 #ifdef CONFIG_HAS_IOMEM
 132         int mmio_needed;
 133         int mmio_read_completed;
 134         int mmio_is_write;
 135         int mmio_size;
 136         unsigned char mmio_data[8];
 137         gpa_t mmio_phys_addr;
 138 #endif
 139
 140 #ifdef CONFIG_KVM_ASYNC_PF
 141         struct {
 142                 u32 queued;
 143                 struct list_head queue;
 144                 struct list_head done;
 145                 spinlock_t lock;
 146         } async_pf;
 147 #endif
 148
 149         struct kvm_vcpu_arch arch;
 150 };
 151
 152 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
 153 {
 154         return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
 155 }
 156
 157 /*
 158  * Some of the bitops functions do not support too long bitmaps.
 159  * This number must be determined not to exceed such limits.
 160  */
 161 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
 162
 163 struct kvm_lpage_info {
 164         unsigned long rmap_pde;
 165         int write_count;
 166 };
 167
 168 struct kvm_memory_slot {
 169         gfn_t base_gfn;
 170         unsigned long npages;
 171         unsigned long flags;
 172         unsigned long *rmap;
 173         unsigned long *dirty_bitmap;
 174         unsigned long *dirty_bitmap_head;
 175         struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1];
 176         unsigned long userspace_addr;
 177         int user_alloc;
 178         int id;
 179 };
 180
 181 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
 182 {
 183         return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
 184 }
 185
 186 struct kvm_kernel_irq_routing_entry {
 187         u32 gsi;
 188         u32 type;
 189         int (*set)(struct kvm_kernel_irq_routing_entry *e,
 190                    struct kvm *kvm, int irq_source_id, int level);
 191         union {
 192                 struct {
 193                         unsigned irqchip;
 194                         unsigned pin;
 195                 } irqchip;
 196                 struct msi_msg msi;
 197         };
 198         struct hlist_node link;
 199 };
 200
 201 #ifdef __KVM_HAVE_IOAPIC
 202
 203 struct kvm_irq_routing_table {
 204         int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
 205         struct kvm_kernel_irq_routing_entry *rt_entries;
 206         u32 nr_rt_entries;
 207         /*
 208          * Array indexed by gsi. Each entry contains list of irq chips
 209          * the gsi is connected to.
 210          */
 211         struct hlist_head map[0];
 212 };
 213
 214 #else
 215
 216 struct kvm_irq_routing_table {};
 217
 218 #endif
 219
 220 struct kvm_memslots {
 221         int nmemslots;
 222         u64 generation;
 223         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
 224                                         KVM_PRIVATE_MEM_SLOTS];
 225 };
 226
 227 struct kvm {
 228         spinlock_t mmu_lock;
 229         struct mutex slots_lock;
 230         struct mm_struct *mm; /* userspace tied to this vm */
 231         struct kvm_memslots *memslots;
 232         struct srcu_struct srcu;
 233 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 234         u32 bsp_vcpu_id;
 235         struct kvm_vcpu *bsp_vcpu;
 236 #endif
 237         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 238         atomic_t online_vcpus;
 239         int last_boosted_vcpu;
 240         struct list_head vm_list;
 241         struct mutex lock;
 242         struct kvm_io_bus *buses[KVM_NR_BUSES];
 243 #ifdef CONFIG_HAVE_KVM_EVENTFD
 244         struct {
 245                 spinlock_t        lock;
 246                 struct list_head  items;
 247         } irqfds;
 248         struct list_head ioeventfds;
 249 #endif
 250         struct kvm_vm_stat stat;
 251         struct kvm_arch arch;
 252         atomic_t users_count;
 253 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 254         struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
 255         struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 256 #endif
 257
 258         struct mutex irq_lock;
 259 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 260         /*
 261          * Update side is protected by irq_lock and,
 262          * if configured, irqfds.lock.
 263          */
 264         struct kvm_irq_routing_table __rcu *irq_routing;
 265         struct hlist_head mask_notifier_list;
 266         struct hlist_head irq_ack_notifier_list;
 267 #endif
 268
 269 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 270         struct mmu_notifier mmu_notifier;
 271         unsigned long mmu_notifier_seq;
 272         long mmu_notifier_count;
 273 #endif
 274         long tlbs_dirty;
 275 };
 276
 277 /* The guest did something we don't support. */
 278 #define pr_unimpl(vcpu, fmt, ...)                                       \
 279  do {                                                                   \
 280         if (printk_ratelimit())                                         \
 281                 printk(KERN_ERR "kvm: %i: cpu%i " fmt,                  \
 282                        current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
 283  } while (0)
 284
 285 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 286 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 287
 288 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 289 {
 290         smp_rmb();
 291         return kvm->vcpus[i];
 292 }
 293
 294 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
 295         for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \
 296              idx < atomic_read(&kvm->online_vcpus) && vcpup; \
 297              vcpup = kvm_get_vcpu(kvm, ++idx))
 298
 299 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 300 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 301
 302 void vcpu_load(struct kvm_vcpu *vcpu);
 303 void vcpu_put(struct kvm_vcpu *vcpu);
 304
 305 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
 306                   struct module *module);
 307 void kvm_exit(void);
 308
 309 void kvm_get_kvm(struct kvm *kvm);
 310 void kvm_put_kvm(struct kvm *kvm);
 311
 312 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
 313 {
 314         return rcu_dereference_check(kvm->memslots,
 315                         srcu_read_lock_held(&kvm->srcu)
 316                         || lockdep_is_held(&kvm->slots_lock));
 317 }
 318
 319 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 320 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 321 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 322
 323 extern struct page *bad_page;
 324 extern pfn_t bad_pfn;
 325
 326 int is_error_page(struct page *page);
 327 int is_error_pfn(pfn_t pfn);
 328 int is_hwpoison_pfn(pfn_t pfn);
 329 int is_fault_pfn(pfn_t pfn);
 330 int kvm_is_error_hva(unsigned long addr);
 331 int kvm_set_memory_region(struct kvm *kvm,
 332                           struct kvm_userspace_memory_region *mem,
 333                           int user_alloc);
 334 int __kvm_set_memory_region(struct kvm *kvm,
 335                             struct kvm_userspace_memory_region *mem,
 336                             int user_alloc);
 337 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 338                                 struct kvm_memory_slot *memslot,
 339                                 struct kvm_memory_slot old,
 340                                 struct kvm_userspace_memory_region *mem,
 341                                 int user_alloc);
 342 void kvm_arch_commit_memory_region(struct kvm *kvm,
 343                                 struct kvm_userspace_memory_region *mem,
 344                                 struct kvm_memory_slot old,
 345                                 int user_alloc);
 346 void kvm_disable_largepages(void);
 347 void kvm_arch_flush_shadow(struct kvm *kvm);
 348
 349 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
 350                             int nr_pages);
 351
 352 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 353 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 354 void kvm_release_page_clean(struct page *page);
 355 void kvm_release_page_dirty(struct page *page);
 356 void kvm_set_page_dirty(struct page *page);
 357 void kvm_set_page_accessed(struct page *page);
 358
 359 pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr);
 360 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
 361 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
 362                        bool write_fault, bool *writable);
 363 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 364 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
 365                       bool *writable);
 366 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
 367                          struct kvm_memory_slot *slot, gfn_t gfn);
 368 int memslot_id(struct kvm *kvm, gfn_t gfn);
 369 void kvm_release_pfn_dirty(pfn_t);
 370 void kvm_release_pfn_clean(pfn_t pfn);
 371 void kvm_set_pfn_dirty(pfn_t pfn);
 372 void kvm_set_pfn_accessed(pfn_t pfn);
 373 void kvm_get_pfn(pfn_t pfn);
 374
 375 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 376                         int len);
 377 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 378                           unsigned long len);
 379 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 380 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 381                          int offset, int len);
 382 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 383                     unsigned long len);
 384 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 385                            void *data, unsigned long len);
 386 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 387                               gpa_t gpa);
 388 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 389 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 390 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 391 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 392 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
 393 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 394 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
 395                              gfn_t gfn);
 396
 397 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 398 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
 399 void kvm_resched(struct kvm_vcpu *vcpu);
 400 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 401 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 402
 403 void kvm_flush_remote_tlbs(struct kvm *kvm);
 404 void kvm_reload_remote_mmus(struct kvm *kvm);
 405
 406 long kvm_arch_dev_ioctl(struct file *filp,
 407                         unsigned int ioctl, unsigned long arg);
 408 long kvm_arch_vcpu_ioctl(struct file *filp,
 409                          unsigned int ioctl, unsigned long arg);
 410
 411 int kvm_dev_ioctl_check_extension(long ext);
 412
 413 int kvm_get_dirty_log(struct kvm *kvm,
 414                         struct kvm_dirty_log *log, int *is_dirty);
 415 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 416                                 struct kvm_dirty_log *log);
 417
 418 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 419                                    struct
 420                                    kvm_userspace_memory_region *mem,
 421                                    int user_alloc);
 422 long kvm_arch_vm_ioctl(struct file *filp,
 423                        unsigned int ioctl, unsigned long arg);
 424
 425 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 426 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 427
 428 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 429                                     struct kvm_translation *tr);
 430
 431 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 432 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 433 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 434                                   struct kvm_sregs *sregs);
 435 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 436                                   struct kvm_sregs *sregs);
 437 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 438                                     struct kvm_mp_state *mp_state);
 439 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 440                                     struct kvm_mp_state *mp_state);
 441 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 442                                         struct kvm_guest_debug *dbg);
 443 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 444
 445 int kvm_arch_init(void *opaque);
 446 void kvm_arch_exit(void);
 447
 448 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 449 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 450
 451 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 452 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 453 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 454 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 455 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 456 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 457
 458 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 459 int kvm_arch_hardware_enable(void *garbage);
 460 void kvm_arch_hardware_disable(void *garbage);
 461 int kvm_arch_hardware_setup(void);
 462 void kvm_arch_hardware_unsetup(void);
 463 void kvm_arch_check_processor_compat(void *rtn);
 464 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 465
 466 void kvm_free_physmem(struct kvm *kvm);
 467
 468 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
 469 static inline struct kvm *kvm_arch_alloc_vm(void)
 470 {
 471         return kzalloc(sizeof(struct kvm), GFP_KERNEL);
 472 }
 473
 474 static inline void kvm_arch_free_vm(struct kvm *kvm)
 475 {
 476         kfree(kvm);
 477 }
 478 #endif
 479
 480 int kvm_arch_init_vm(struct kvm *kvm);
 481 void kvm_arch_destroy_vm(struct kvm *kvm);
 482 void kvm_free_all_assigned_devices(struct kvm *kvm);
 483 void kvm_arch_sync_events(struct kvm *kvm);
 484
 485 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 486 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 487
 488 int kvm_is_mmio_pfn(pfn_t pfn);
 489
 490 struct kvm_irq_ack_notifier {
 491         struct hlist_node link;
 492         unsigned gsi;
 493         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 494 };
 495
 496 struct kvm_assigned_dev_kernel {
 497         struct kvm_irq_ack_notifier ack_notifier;
 498         struct list_head list;
 499         int assigned_dev_id;
 500         int host_segnr;
 501         int host_busnr;
 502         int host_devfn;
 503         unsigned int entries_nr;
 504         int host_irq;
 505         bool host_irq_disabled;
 506         struct msix_entry *host_msix_entries;
 507         int guest_irq;
 508         struct msix_entry *guest_msix_entries;
 509         unsigned long irq_requested_type;
 510         int irq_source_id;
 511         int flags;
 512         struct pci_dev *dev;
 513         struct kvm *kvm;
 514         spinlock_t intx_lock;
 515         char irq_name[32];
 516 };
 517
 518 struct kvm_irq_mask_notifier {
 519         void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
 520         int irq;
 521         struct hlist_node link;
 522 };
 523
 524 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 525                                     struct kvm_irq_mask_notifier *kimn);
 526 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 527                                       struct kvm_irq_mask_notifier *kimn);
 528 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
 529                              bool mask);
 530
 531 #ifdef __KVM_HAVE_IOAPIC
 532 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
 533                                    union kvm_ioapic_redirect_entry *entry,
 534                                    unsigned long *deliver_bitmask);
 535 #endif
 536 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
 537 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
 538                 int irq_source_id, int level);
 539 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 540 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 541                                    struct kvm_irq_ack_notifier *kian);
 542 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 543                                    struct kvm_irq_ack_notifier *kian);
 544 int kvm_request_irq_source_id(struct kvm *kvm);
 545 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 546
 547 /* For vcpu->arch.iommu_flags */
 548 #define KVM_IOMMU_CACHE_COHERENCY       0x1
 549
 550 #ifdef CONFIG_IOMMU_API
 551 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 552 int kvm_iommu_map_guest(struct kvm *kvm);
 553 int kvm_iommu_unmap_guest(struct kvm *kvm);
 554 int kvm_assign_device(struct kvm *kvm,
 555                       struct kvm_assigned_dev_kernel *assigned_dev);
 556 int kvm_deassign_device(struct kvm *kvm,
 557                         struct kvm_assigned_dev_kernel *assigned_dev);
 558 #else /* CONFIG_IOMMU_API */
 559 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 560                                       struct kvm_memory_slot *slot)
 561 {
 562         return 0;
 563 }
 564
 565 static inline int kvm_iommu_map_guest(struct kvm *kvm)
 566 {
 567         return -ENODEV;
 568 }
 569
 570 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 571 {
 572         return 0;
 573 }
 574
 575 static inline int kvm_assign_device(struct kvm *kvm,
 576                 struct kvm_assigned_dev_kernel *assigned_dev)
 577 {
 578         return 0;
 579 }
 580
 581 static inline int kvm_deassign_device(struct kvm *kvm,
 582                 struct kvm_assigned_dev_kernel *assigned_dev)
 583 {
 584         return 0;
 585 }
 586 #endif /* CONFIG_IOMMU_API */
 587
 588 static inline void kvm_guest_enter(void)
 589 {
 590         account_system_vtime(current);
 591         current->flags |= PF_VCPU;
 592 }
 593
 594 static inline void kvm_guest_exit(void)
 595 {
 596         account_system_vtime(current);
 597         current->flags &= ~PF_VCPU;
 598 }
 599
 600 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
 601                                                gfn_t gfn)
 602 {
 603         return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
 604 }
 605
 606 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 607 {
 608         return (gpa_t)gfn << PAGE_SHIFT;
 609 }
 610
 611 static inline gfn_t gpa_to_gfn(gpa_t gpa)
 612 {
 613         return (gfn_t)(gpa >> PAGE_SHIFT);
 614 }
 615
 616 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 617 {
 618         return (hpa_t)pfn << PAGE_SHIFT;
 619 }
 620
 621 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 622 {
 623         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 624 }
 625
 626 enum kvm_stat_kind {
 627         KVM_STAT_VM,
 628         KVM_STAT_VCPU,
 629 };
 630
 631 struct kvm_stats_debugfs_item {
 632         const char *name;
 633         int offset;
 634         enum kvm_stat_kind kind;
 635         struct dentry *dentry;
 636 };
 637 extern struct kvm_stats_debugfs_item debugfs_entries[];
 638 extern struct dentry *kvm_debugfs_dir;
 639
 640 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 641 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
 642 {
 643         if (unlikely(vcpu->kvm->mmu_notifier_count))
 644                 return 1;
 645         /*
 646          * Both reads happen under the mmu_lock and both values are
 647          * modified under mmu_lock, so there's no need of smb_rmb()
 648          * here in between, otherwise mmu_notifier_count should be
 649          * read before mmu_notifier_seq, see
 650          * mmu_notifier_invalidate_range_end write side.
 651          */
 652         if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
 653                 return 1;
 654         return 0;
 655 }
 656 #endif
 657
 658 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 659
 660 #define KVM_MAX_IRQ_ROUTES 1024
 661
 662 int kvm_setup_default_irq_routing(struct kvm *kvm);
 663 int kvm_set_irq_routing(struct kvm *kvm,
 664                         const struct kvm_irq_routing_entry *entries,
 665                         unsigned nr,
 666                         unsigned flags);
 667 void kvm_free_irq_routing(struct kvm *kvm);
 668
 669 #else
 670
 671 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 672
 673 #endif
 674
 675 #ifdef CONFIG_HAVE_KVM_EVENTFD
 676
 677 void kvm_eventfd_init(struct kvm *kvm);
 678 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
 679 void kvm_irqfd_release(struct kvm *kvm);
 680 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
 681 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
 682
 683 #else
 684
 685 static inline void kvm_eventfd_init(struct kvm *kvm) {}
 686
 687 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
 688 {
 689         return -EINVAL;
 690 }
 691
 692 static inline void kvm_irqfd_release(struct kvm *kvm) {}
 693
 694 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 695 static inline void kvm_irq_routing_update(struct kvm *kvm,
 696                                           struct kvm_irq_routing_table *irq_rt)
 697 {
 698         rcu_assign_pointer(kvm->irq_routing, irq_rt);
 699 }
 700 #endif
 701
 702 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
 703 {
 704         return -ENOSYS;
 705 }
 706
 707 #endif /* CONFIG_HAVE_KVM_EVENTFD */
 708
 709 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 710 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
 711 {
 712         return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
 713 }
 714 #endif
 715
 716 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
 717
 718 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 719                                   unsigned long arg);
 720
 721 #else
 722
 723 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 724                                                 unsigned long arg)
 725 {
 726         return -ENOTTY;
 727 }
 728
 729 #endif
 730
 731 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
 732 {
 733         set_bit(req, &vcpu->requests);
 734 }
 735
 736 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
 737 {
 738         if (test_bit(req, &vcpu->requests)) {
 739                 clear_bit(req, &vcpu->requests);
 740                 return true;
 741         } else {
 742                 return false;
 743         }
 744 }
 745
 746 #endif
 747