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