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