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/mmu_notifier.h>
  18 #include <linux/preempt.h>
  19 #include <linux/msi.h>
  20 #include <linux/slab.h>
  21 #include <linux/rcupdate.h>
  22 #include <linux/ratelimit.h>
  23 #include <asm/signal.h>
  24
  25 #include <linux/kvm.h>
  26 #include <linux/kvm_para.h>
  27
  28 #include <linux/kvm_types.h>
  29
  30 #include <asm/kvm_host.h>
  31
  32 #ifndef KVM_MMIO_SIZE
  33 #define KVM_MMIO_SIZE 8
  34 #endif
  35
  36 /*
  37  * vcpu->requests bit members
  38  */
  39 #define KVM_REQ_TLB_FLUSH          0
  40 #define KVM_REQ_MIGRATE_TIMER      1
  41 #define KVM_REQ_REPORT_TPR_ACCESS  2
  42 #define KVM_REQ_MMU_RELOAD         3
  43 #define KVM_REQ_TRIPLE_FAULT       4
  44 #define KVM_REQ_PENDING_TIMER      5
  45 #define KVM_REQ_UNHALT             6
  46 #define KVM_REQ_MMU_SYNC           7
  47 #define KVM_REQ_CLOCK_UPDATE       8
  48 #define KVM_REQ_KICK               9
  49 #define KVM_REQ_DEACTIVATE_FPU    10
  50 #define KVM_REQ_EVENT             11
  51 #define KVM_REQ_APF_HALT          12
  52 #define KVM_REQ_STEAL_UPDATE      13
  53 #define KVM_REQ_NMI               14
  54 #define KVM_REQ_IMMEDIATE_EXIT    15
  55
  56 #define KVM_USERSPACE_IRQ_SOURCE_ID     0
  57
  58 struct kvm;
  59 struct kvm_vcpu;
  60 extern struct kmem_cache *kvm_vcpu_cache;
  61
  62 struct kvm_io_range {
  63         gpa_t addr;
  64         int len;
  65         struct kvm_io_device *dev;
  66 };
  67
  68 struct kvm_io_bus {
  69         int                   dev_count;
  70 #define NR_IOBUS_DEVS 300
  71         struct kvm_io_range range[NR_IOBUS_DEVS];
  72 };
  73
  74 enum kvm_bus {
  75         KVM_MMIO_BUS,
  76         KVM_PIO_BUS,
  77         KVM_NR_BUSES
  78 };
  79
  80 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
  81                      int len, const void *val);
  82 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
  83                     void *val);
  84 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
  85                             int len, struct kvm_io_device *dev);
  86 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
  87                               struct kvm_io_device *dev);
  88
  89 #ifdef CONFIG_KVM_ASYNC_PF
  90 struct kvm_async_pf {
  91         struct work_struct work;
  92         struct list_head link;
  93         struct list_head queue;
  94         struct kvm_vcpu *vcpu;
  95         struct mm_struct *mm;
  96         gva_t gva;
  97         unsigned long addr;
  98         struct kvm_arch_async_pf arch;
  99         struct page *page;
 100         bool done;
 101 };
 102
 103 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
 104 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
 105 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
 106                        struct kvm_arch_async_pf *arch);
 107 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
 108 #endif
 109
 110 enum {
 111         OUTSIDE_GUEST_MODE,
 112         IN_GUEST_MODE,
 113         EXITING_GUEST_MODE
 114 };
 115
 116 struct kvm_vcpu {
 117         struct kvm *kvm;
 118 #ifdef CONFIG_PREEMPT_NOTIFIERS
 119         struct preempt_notifier preempt_notifier;
 120 #endif
 121         int cpu;
 122         int vcpu_id;
 123         int srcu_idx;
 124         int mode;
 125         unsigned long requests;
 126         unsigned long guest_debug;
 127
 128         struct mutex mutex;
 129         struct kvm_run *run;
 130
 131         int fpu_active;
 132         int guest_fpu_loaded, guest_xcr0_loaded;
 133         wait_queue_head_t wq;
 134         struct pid *pid;
 135         int sigset_active;
 136         sigset_t sigset;
 137         struct kvm_vcpu_stat stat;
 138
 139 #ifdef CONFIG_HAS_IOMEM
 140         int mmio_needed;
 141         int mmio_read_completed;
 142         int mmio_is_write;
 143         int mmio_size;
 144         int mmio_index;
 145         unsigned char mmio_data[KVM_MMIO_SIZE];
 146         gpa_t mmio_phys_addr;
 147 #endif
 148
 149 #ifdef CONFIG_KVM_ASYNC_PF
 150         struct {
 151                 u32 queued;
 152                 struct list_head queue;
 153                 struct list_head done;
 154                 spinlock_t lock;
 155         } async_pf;
 156 #endif
 157
 158         struct kvm_vcpu_arch arch;
 159 };
 160
 161 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
 162 {
 163         return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
 164 }
 165
 166 /*
 167  * Some of the bitops functions do not support too long bitmaps.
 168  * This number must be determined not to exceed such limits.
 169  */
 170 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
 171
 172 struct kvm_lpage_info {
 173         unsigned long rmap_pde;
 174         int write_count;
 175 };
 176
 177 struct kvm_memory_slot {
 178         gfn_t base_gfn;
 179         unsigned long npages;
 180         unsigned long flags;
 181         unsigned long *rmap;
 182         unsigned long *dirty_bitmap;
 183         unsigned long *dirty_bitmap_head;
 184         unsigned long nr_dirty_pages;
 185         struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1];
 186         unsigned long userspace_addr;
 187         int user_alloc;
 188         int id;
 189 };
 190
 191 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
 192 {
 193         return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
 194 }
 195
 196 struct kvm_kernel_irq_routing_entry {
 197         u32 gsi;
 198         u32 type;
 199         int (*set)(struct kvm_kernel_irq_routing_entry *e,
 200                    struct kvm *kvm, int irq_source_id, int level);
 201         union {
 202                 struct {
 203                         unsigned irqchip;
 204                         unsigned pin;
 205                 } irqchip;
 206                 struct msi_msg msi;
 207         };
 208         struct hlist_node link;
 209 };
 210
 211 #ifdef __KVM_HAVE_IOAPIC
 212
 213 struct kvm_irq_routing_table {
 214         int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
 215         struct kvm_kernel_irq_routing_entry *rt_entries;
 216         u32 nr_rt_entries;
 217         /*
 218          * Array indexed by gsi. Each entry contains list of irq chips
 219          * the gsi is connected to.
 220          */
 221         struct hlist_head map[0];
 222 };
 223
 224 #else
 225
 226 struct kvm_irq_routing_table {};
 227
 228 #endif
 229
 230 #ifndef KVM_MEM_SLOTS_NUM
 231 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
 232 #endif
 233
 234 struct kvm_memslots {
 235         int nmemslots;
 236         u64 generation;
 237         struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
 238 };
 239
 240 struct kvm {
 241         spinlock_t mmu_lock;
 242         struct mutex slots_lock;
 243         struct mm_struct *mm; /* userspace tied to this vm */
 244         struct kvm_memslots *memslots;
 245         struct srcu_struct srcu;
 246 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 247         u32 bsp_vcpu_id;
 248         struct kvm_vcpu *bsp_vcpu;
 249 #endif
 250         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 251         atomic_t online_vcpus;
 252         int last_boosted_vcpu;
 253         struct list_head vm_list;
 254         struct mutex lock;
 255         struct kvm_io_bus *buses[KVM_NR_BUSES];
 256 #ifdef CONFIG_HAVE_KVM_EVENTFD
 257         struct {
 258                 spinlock_t        lock;
 259                 struct list_head  items;
 260         } irqfds;
 261         struct list_head ioeventfds;
 262 #endif
 263         struct kvm_vm_stat stat;
 264         struct kvm_arch arch;
 265         atomic_t users_count;
 266 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 267         struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 268         spinlock_t ring_lock;
 269         struct list_head coalesced_zones;
 270 #endif
 271
 272         struct mutex irq_lock;
 273 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 274         /*
 275          * Update side is protected by irq_lock and,
 276          * if configured, irqfds.lock.
 277          */
 278         struct kvm_irq_routing_table __rcu *irq_routing;
 279         struct hlist_head mask_notifier_list;
 280         struct hlist_head irq_ack_notifier_list;
 281 #endif
 282
 283 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 284         struct mmu_notifier mmu_notifier;
 285         unsigned long mmu_notifier_seq;
 286         long mmu_notifier_count;
 287 #endif
 288         long tlbs_dirty;
 289 };
 290
 291 /* The guest did something we don't support. */
 292 #define pr_unimpl(vcpu, fmt, ...)                                       \
 293         pr_err_ratelimited("kvm: %i: cpu%i " fmt,                       \
 294                            current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__)
 295
 296 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 297 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 298
 299 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 300 {
 301         smp_rmb();
 302         return kvm->vcpus[i];
 303 }
 304
 305 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
 306         for (idx = 0; \
 307              idx < atomic_read(&kvm->online_vcpus) && \
 308              (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
 309              idx++)
 310
 311 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 312 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 313
 314 void vcpu_load(struct kvm_vcpu *vcpu);
 315 void vcpu_put(struct kvm_vcpu *vcpu);
 316
 317 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
 318                   struct module *module);
 319 void kvm_exit(void);
 320
 321 void kvm_get_kvm(struct kvm *kvm);
 322 void kvm_put_kvm(struct kvm *kvm);
 323 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
 324
 325 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
 326 {
 327         return rcu_dereference_check(kvm->memslots,
 328                         srcu_read_lock_held(&kvm->srcu)
 329                         || lockdep_is_held(&kvm->slots_lock));
 330 }
 331
 332 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 333 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 334 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 335
 336 extern struct page *bad_page;
 337 extern struct page *fault_page;
 338
 339 extern pfn_t bad_pfn;
 340 extern pfn_t fault_pfn;
 341
 342 int is_error_page(struct page *page);
 343 int is_error_pfn(pfn_t pfn);
 344 int is_hwpoison_pfn(pfn_t pfn);
 345 int is_fault_pfn(pfn_t pfn);
 346 int is_noslot_pfn(pfn_t pfn);
 347 int is_invalid_pfn(pfn_t pfn);
 348 int kvm_is_error_hva(unsigned long addr);
 349 int kvm_set_memory_region(struct kvm *kvm,
 350                           struct kvm_userspace_memory_region *mem,
 351                           int user_alloc);
 352 int __kvm_set_memory_region(struct kvm *kvm,
 353                             struct kvm_userspace_memory_region *mem,
 354                             int user_alloc);
 355 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 356                                 struct kvm_memory_slot *memslot,
 357                                 struct kvm_memory_slot old,
 358                                 struct kvm_userspace_memory_region *mem,
 359                                 int user_alloc);
 360 void kvm_arch_commit_memory_region(struct kvm *kvm,
 361                                 struct kvm_userspace_memory_region *mem,
 362                                 struct kvm_memory_slot old,
 363                                 int user_alloc);
 364 void kvm_disable_largepages(void);
 365 void kvm_arch_flush_shadow(struct kvm *kvm);
 366
 367 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
 368                             int nr_pages);
 369
 370 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 371 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 372 void kvm_release_page_clean(struct page *page);
 373 void kvm_release_page_dirty(struct page *page);
 374 void kvm_set_page_dirty(struct page *page);
 375 void kvm_set_page_accessed(struct page *page);
 376
 377 pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr);
 378 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
 379 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
 380                        bool write_fault, bool *writable);
 381 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 382 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
 383                       bool *writable);
 384 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
 385                          struct kvm_memory_slot *slot, gfn_t gfn);
 386 void kvm_release_pfn_dirty(pfn_t);
 387 void kvm_release_pfn_clean(pfn_t pfn);
 388 void kvm_set_pfn_dirty(pfn_t pfn);
 389 void kvm_set_pfn_accessed(pfn_t pfn);
 390 void kvm_get_pfn(pfn_t pfn);
 391
 392 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 393                         int len);
 394 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 395                           unsigned long len);
 396 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 397 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 398                            void *data, unsigned long len);
 399 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 400                          int offset, int len);
 401 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 402                     unsigned long len);
 403 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 404                            void *data, unsigned long len);
 405 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 406                               gpa_t gpa);
 407 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 408 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 409 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 410 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 411 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
 412 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 413 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
 414                              gfn_t gfn);
 415
 416 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 417 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
 418 void kvm_resched(struct kvm_vcpu *vcpu);
 419 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 420 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 421
 422 void kvm_flush_remote_tlbs(struct kvm *kvm);
 423 void kvm_reload_remote_mmus(struct kvm *kvm);
 424
 425 long kvm_arch_dev_ioctl(struct file *filp,
 426                         unsigned int ioctl, unsigned long arg);
 427 long kvm_arch_vcpu_ioctl(struct file *filp,
 428                          unsigned int ioctl, unsigned long arg);
 429
 430 int kvm_dev_ioctl_check_extension(long ext);
 431
 432 int kvm_get_dirty_log(struct kvm *kvm,
 433                         struct kvm_dirty_log *log, int *is_dirty);
 434 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 435                                 struct kvm_dirty_log *log);
 436
 437 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 438                                    struct
 439                                    kvm_userspace_memory_region *mem,
 440                                    int user_alloc);
 441 long kvm_arch_vm_ioctl(struct file *filp,
 442                        unsigned int ioctl, unsigned long arg);
 443
 444 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 445 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 446
 447 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 448                                     struct kvm_translation *tr);
 449
 450 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 451 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 452 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 453                                   struct kvm_sregs *sregs);
 454 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 455                                   struct kvm_sregs *sregs);
 456 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 457                                     struct kvm_mp_state *mp_state);
 458 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 459                                     struct kvm_mp_state *mp_state);
 460 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 461                                         struct kvm_guest_debug *dbg);
 462 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 463
 464 int kvm_arch_init(void *opaque);
 465 void kvm_arch_exit(void);
 466
 467 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 468 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 469
 470 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 471 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 472 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 473 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 474 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 475 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 476
 477 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 478 int kvm_arch_hardware_enable(void *garbage);
 479 void kvm_arch_hardware_disable(void *garbage);
 480 int kvm_arch_hardware_setup(void);
 481 void kvm_arch_hardware_unsetup(void);
 482 void kvm_arch_check_processor_compat(void *rtn);
 483 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 484
 485 void kvm_free_physmem(struct kvm *kvm);
 486
 487 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
 488 static inline struct kvm *kvm_arch_alloc_vm(void)
 489 {
 490         return kzalloc(sizeof(struct kvm), GFP_KERNEL);
 491 }
 492
 493 static inline void kvm_arch_free_vm(struct kvm *kvm)
 494 {
 495         kfree(kvm);
 496 }
 497 #endif
 498
 499 int kvm_arch_init_vm(struct kvm *kvm);
 500 void kvm_arch_destroy_vm(struct kvm *kvm);
 501 void kvm_free_all_assigned_devices(struct kvm *kvm);
 502 void kvm_arch_sync_events(struct kvm *kvm);
 503
 504 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 505 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 506
 507 int kvm_is_mmio_pfn(pfn_t pfn);
 508
 509 struct kvm_irq_ack_notifier {
 510         struct hlist_node link;
 511         unsigned gsi;
 512         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 513 };
 514
 515 struct kvm_assigned_dev_kernel {
 516         struct kvm_irq_ack_notifier ack_notifier;
 517         struct list_head list;
 518         int assigned_dev_id;
 519         int host_segnr;
 520         int host_busnr;
 521         int host_devfn;
 522         unsigned int entries_nr;
 523         int host_irq;
 524         bool host_irq_disabled;
 525         struct msix_entry *host_msix_entries;
 526         int guest_irq;
 527         struct msix_entry *guest_msix_entries;
 528         unsigned long irq_requested_type;
 529         int irq_source_id;
 530         int flags;
 531         struct pci_dev *dev;
 532         struct kvm *kvm;
 533         spinlock_t intx_lock;
 534         char irq_name[32];
 535         struct pci_saved_state *pci_saved_state;
 536 };
 537
 538 struct kvm_irq_mask_notifier {
 539         void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
 540         int irq;
 541         struct hlist_node link;
 542 };
 543
 544 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 545                                     struct kvm_irq_mask_notifier *kimn);
 546 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 547                                       struct kvm_irq_mask_notifier *kimn);
 548 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
 549                              bool mask);
 550
 551 #ifdef __KVM_HAVE_IOAPIC
 552 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
 553                                    union kvm_ioapic_redirect_entry *entry,
 554                                    unsigned long *deliver_bitmask);
 555 #endif
 556 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
 557 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
 558                 int irq_source_id, int level);
 559 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 560 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 561                                    struct kvm_irq_ack_notifier *kian);
 562 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 563                                    struct kvm_irq_ack_notifier *kian);
 564 int kvm_request_irq_source_id(struct kvm *kvm);
 565 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 566
 567 /* For vcpu->arch.iommu_flags */
 568 #define KVM_IOMMU_CACHE_COHERENCY       0x1
 569
 570 #ifdef CONFIG_IOMMU_API
 571 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 572 int kvm_iommu_map_guest(struct kvm *kvm);
 573 int kvm_iommu_unmap_guest(struct kvm *kvm);
 574 int kvm_assign_device(struct kvm *kvm,
 575                       struct kvm_assigned_dev_kernel *assigned_dev);
 576 int kvm_deassign_device(struct kvm *kvm,
 577                         struct kvm_assigned_dev_kernel *assigned_dev);
 578 #else /* CONFIG_IOMMU_API */
 579 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 580                                       struct kvm_memory_slot *slot)
 581 {
 582         return 0;
 583 }
 584
 585 static inline int kvm_iommu_map_guest(struct kvm *kvm)
 586 {
 587         return -ENODEV;
 588 }
 589
 590 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 591 {
 592         return 0;
 593 }
 594
 595 static inline int kvm_assign_device(struct kvm *kvm,
 596                 struct kvm_assigned_dev_kernel *assigned_dev)
 597 {
 598         return 0;
 599 }
 600
 601 static inline int kvm_deassign_device(struct kvm *kvm,
 602                 struct kvm_assigned_dev_kernel *assigned_dev)
 603 {
 604         return 0;
 605 }
 606 #endif /* CONFIG_IOMMU_API */
 607
 608 static inline void kvm_guest_enter(void)
 609 {
 610         BUG_ON(preemptible());
 611         account_system_vtime(current);
 612         current->flags |= PF_VCPU;
 613         /* KVM does not hold any references to rcu protected data when it
 614          * switches CPU into a guest mode. In fact switching to a guest mode
 615          * is very similar to exiting to userspase from rcu point of view. In
 616          * addition CPU may stay in a guest mode for quite a long time (up to
 617          * one time slice). Lets treat guest mode as quiescent state, just like
 618          * we do with user-mode execution.
 619          */
 620         rcu_virt_note_context_switch(smp_processor_id());
 621 }
 622
 623 static inline void kvm_guest_exit(void)
 624 {
 625         account_system_vtime(current);
 626         current->flags &= ~PF_VCPU;
 627 }
 628
 629 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
 630 {
 631         return gfn_to_memslot(kvm, gfn)->id;
 632 }
 633
 634 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
 635                                                gfn_t gfn)
 636 {
 637         return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
 638 }
 639
 640 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 641 {
 642         return (gpa_t)gfn << PAGE_SHIFT;
 643 }
 644
 645 static inline gfn_t gpa_to_gfn(gpa_t gpa)
 646 {
 647         return (gfn_t)(gpa >> PAGE_SHIFT);
 648 }
 649
 650 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 651 {
 652         return (hpa_t)pfn << PAGE_SHIFT;
 653 }
 654
 655 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 656 {
 657         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 658 }
 659
 660 enum kvm_stat_kind {
 661         KVM_STAT_VM,
 662         KVM_STAT_VCPU,
 663 };
 664
 665 struct kvm_stats_debugfs_item {
 666         const char *name;
 667         int offset;
 668         enum kvm_stat_kind kind;
 669         struct dentry *dentry;
 670 };
 671 extern struct kvm_stats_debugfs_item debugfs_entries[];
 672 extern struct dentry *kvm_debugfs_dir;
 673
 674 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 675 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
 676 {
 677         if (unlikely(vcpu->kvm->mmu_notifier_count))
 678                 return 1;
 679         /*
 680          * Both reads happen under the mmu_lock and both values are
 681          * modified under mmu_lock, so there's no need of smb_rmb()
 682          * here in between, otherwise mmu_notifier_count should be
 683          * read before mmu_notifier_seq, see
 684          * mmu_notifier_invalidate_range_end write side.
 685          */
 686         if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
 687                 return 1;
 688         return 0;
 689 }
 690 #endif
 691
 692 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 693
 694 #define KVM_MAX_IRQ_ROUTES 1024
 695
 696 int kvm_setup_default_irq_routing(struct kvm *kvm);
 697 int kvm_set_irq_routing(struct kvm *kvm,
 698                         const struct kvm_irq_routing_entry *entries,
 699                         unsigned nr,
 700                         unsigned flags);
 701 void kvm_free_irq_routing(struct kvm *kvm);
 702
 703 #else
 704
 705 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 706
 707 #endif
 708
 709 #ifdef CONFIG_HAVE_KVM_EVENTFD
 710
 711 void kvm_eventfd_init(struct kvm *kvm);
 712 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
 713 void kvm_irqfd_release(struct kvm *kvm);
 714 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
 715 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
 716
 717 #else
 718
 719 static inline void kvm_eventfd_init(struct kvm *kvm) {}
 720
 721 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
 722 {
 723         return -EINVAL;
 724 }
 725
 726 static inline void kvm_irqfd_release(struct kvm *kvm) {}
 727
 728 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 729 static inline void kvm_irq_routing_update(struct kvm *kvm,
 730                                           struct kvm_irq_routing_table *irq_rt)
 731 {
 732         rcu_assign_pointer(kvm->irq_routing, irq_rt);
 733 }
 734 #endif
 735
 736 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
 737 {
 738         return -ENOSYS;
 739 }
 740
 741 #endif /* CONFIG_HAVE_KVM_EVENTFD */
 742
 743 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 744 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
 745 {
 746         return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
 747 }
 748 #endif
 749
 750 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
 751
 752 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 753                                   unsigned long arg);
 754
 755 #else
 756
 757 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 758                                                 unsigned long arg)
 759 {
 760         return -ENOTTY;
 761 }
 762
 763 #endif
 764
 765 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
 766 {
 767         set_bit(req, &vcpu->requests);
 768 }
 769
 770 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
 771 {
 772         if (test_bit(req, &vcpu->requests)) {
 773                 clear_bit(req, &vcpu->requests);
 774                 return true;
 775         } else {
 776                 return false;
 777         }
 778 }
 779
 780 #endif
 781