include/linux/kvm_host.h

   1 #ifndef __KVM_HOST_H
   2 #define __KVM_HOST_H
   3
   4 /*
   5  * This work is licensed under the terms of the GNU GPL, version 2.  See
   6  * the COPYING file in the top-level directory.
   7  */
   8
   9 #include <linux/types.h>
  10 #include <linux/hardirq.h>
  11 #include <linux/list.h>
  12 #include <linux/mutex.h>
  13 #include <linux/spinlock.h>
  14 #include <linux/signal.h>
  15 #include <linux/sched.h>
  16 #include <linux/mm.h>
  17 #include <linux/preempt.h>
  18 #include <linux/msi.h>
  19 #include <asm/signal.h>
  20
  21 #include <linux/kvm.h>
  22 #include <linux/kvm_para.h>
  23
  24 #include <linux/kvm_types.h>
  25
  26 #include <asm/kvm_host.h>
  27
  28 /*
  29  * vcpu->requests bit members
  30  */
  31 #define KVM_REQ_TLB_FLUSH          0
  32 #define KVM_REQ_MIGRATE_TIMER      1
  33 #define KVM_REQ_REPORT_TPR_ACCESS  2
  34 #define KVM_REQ_MMU_RELOAD         3
  35 #define KVM_REQ_TRIPLE_FAULT       4
  36 #define KVM_REQ_PENDING_TIMER      5
  37 #define KVM_REQ_UNHALT             6
  38 #define KVM_REQ_MMU_SYNC           7
  39 #define KVM_REQ_CLOCK_UPDATE       8
  40 #define KVM_REQ_KICK               9
  41 #define KVM_REQ_DEACTIVATE_FPU    10
  42 #define KVM_REQ_EVENT             11
  43
  44 #define KVM_USERSPACE_IRQ_SOURCE_ID     0
  45
  46 struct kvm;
  47 struct kvm_vcpu;
  48 extern struct kmem_cache *kvm_vcpu_cache;
  49
  50 /*
  51  * It would be nice to use something smarter than a linear search, TBD...
  52  * Thankfully we dont expect many devices to register (famous last words :),
  53  * so until then it will suffice.  At least its abstracted so we can change
  54  * in one place.
  55  */
  56 struct kvm_io_bus {
  57         int                   dev_count;
  58 #define NR_IOBUS_DEVS 200
  59         struct kvm_io_device *devs[NR_IOBUS_DEVS];
  60 };
  61
  62 enum kvm_bus {
  63         KVM_MMIO_BUS,
  64         KVM_PIO_BUS,
  65         KVM_NR_BUSES
  66 };
  67
  68 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
  69                      int len, const void *val);
  70 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
  71                     void *val);
  72 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx,
  73                             struct kvm_io_device *dev);
  74 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
  75                               struct kvm_io_device *dev);
  76
  77 struct kvm_vcpu {
  78         struct kvm *kvm;
  79 #ifdef CONFIG_PREEMPT_NOTIFIERS
  80         struct preempt_notifier preempt_notifier;
  81 #endif
  82         int vcpu_id;
  83         struct mutex mutex;
  84         int   cpu;
  85         atomic_t guest_mode;
  86         struct kvm_run *run;
  87         unsigned long requests;
  88         unsigned long guest_debug;
  89         int srcu_idx;
  90
  91         int fpu_active;
  92         int guest_fpu_loaded, guest_xcr0_loaded;
  93         wait_queue_head_t wq;
  94         int sigset_active;
  95         sigset_t sigset;
  96         struct kvm_vcpu_stat stat;
  97
  98 #ifdef CONFIG_HAS_IOMEM
  99         int mmio_needed;
 100         int mmio_read_completed;
 101         int mmio_is_write;
 102         int mmio_size;
 103         unsigned char mmio_data[8];
 104         gpa_t mmio_phys_addr;
 105 #endif
 106
 107         struct kvm_vcpu_arch arch;
 108 };
 109
 110 /*
 111  * Some of the bitops functions do not support too long bitmaps.
 112  * This number must be determined not to exceed such limits.
 113  */
 114 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
 115
 116 struct kvm_memory_slot {
 117         gfn_t base_gfn;
 118         unsigned long npages;
 119         unsigned long flags;
 120         unsigned long *rmap;
 121         unsigned long *dirty_bitmap;
 122         struct {
 123                 unsigned long rmap_pde;
 124                 int write_count;
 125         } *lpage_info[KVM_NR_PAGE_SIZES - 1];
 126         unsigned long userspace_addr;
 127         int user_alloc;
 128         int id;
 129 };
 130
 131 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
 132 {
 133         return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
 134 }
 135
 136 struct kvm_kernel_irq_routing_entry {
 137         u32 gsi;
 138         u32 type;
 139         int (*set)(struct kvm_kernel_irq_routing_entry *e,
 140                    struct kvm *kvm, int irq_source_id, int level);
 141         union {
 142                 struct {
 143                         unsigned irqchip;
 144                         unsigned pin;
 145                 } irqchip;
 146                 struct msi_msg msi;
 147         };
 148         struct hlist_node link;
 149 };
 150
 151 #ifdef __KVM_HAVE_IOAPIC
 152
 153 struct kvm_irq_routing_table {
 154         int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
 155         struct kvm_kernel_irq_routing_entry *rt_entries;
 156         u32 nr_rt_entries;
 157         /*
 158          * Array indexed by gsi. Each entry contains list of irq chips
 159          * the gsi is connected to.
 160          */
 161         struct hlist_head map[0];
 162 };
 163
 164 #else
 165
 166 struct kvm_irq_routing_table {};
 167
 168 #endif
 169
 170 struct kvm_memslots {
 171         int nmemslots;
 172         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
 173                                         KVM_PRIVATE_MEM_SLOTS];
 174 };
 175
 176 struct kvm {
 177         spinlock_t mmu_lock;
 178         raw_spinlock_t requests_lock;
 179         struct mutex slots_lock;
 180         struct mm_struct *mm; /* userspace tied to this vm */
 181         struct kvm_memslots *memslots;
 182         struct srcu_struct srcu;
 183 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 184         u32 bsp_vcpu_id;
 185         struct kvm_vcpu *bsp_vcpu;
 186 #endif
 187         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 188         atomic_t online_vcpus;
 189         struct list_head vm_list;
 190         struct mutex lock;
 191         struct kvm_io_bus *buses[KVM_NR_BUSES];
 192 #ifdef CONFIG_HAVE_KVM_EVENTFD
 193         struct {
 194                 spinlock_t        lock;
 195                 struct list_head  items;
 196         } irqfds;
 197         struct list_head ioeventfds;
 198 #endif
 199         struct kvm_vm_stat stat;
 200         struct kvm_arch arch;
 201         atomic_t users_count;
 202 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 203         struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
 204         struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 205 #endif
 206
 207         struct mutex irq_lock;
 208 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 209         struct kvm_irq_routing_table __rcu *irq_routing;
 210         struct hlist_head mask_notifier_list;
 211         struct hlist_head irq_ack_notifier_list;
 212 #endif
 213
 214 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 215         struct mmu_notifier mmu_notifier;
 216         unsigned long mmu_notifier_seq;
 217         long mmu_notifier_count;
 218 #endif
 219 };
 220
 221 /* The guest did something we don't support. */
 222 #define pr_unimpl(vcpu, fmt, ...)                                       \
 223  do {                                                                   \
 224         if (printk_ratelimit())                                         \
 225                 printk(KERN_ERR "kvm: %i: cpu%i " fmt,                  \
 226                        current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
 227  } while (0)
 228
 229 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 230 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 231
 232 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 233 {
 234         smp_rmb();
 235         return kvm->vcpus[i];
 236 }
 237
 238 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
 239         for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \
 240              idx < atomic_read(&kvm->online_vcpus) && vcpup; \
 241              vcpup = kvm_get_vcpu(kvm, ++idx))
 242
 243 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 244 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 245
 246 void vcpu_load(struct kvm_vcpu *vcpu);
 247 void vcpu_put(struct kvm_vcpu *vcpu);
 248
 249 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
 250                   struct module *module);
 251 void kvm_exit(void);
 252
 253 void kvm_get_kvm(struct kvm *kvm);
 254 void kvm_put_kvm(struct kvm *kvm);
 255
 256 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
 257 {
 258         return rcu_dereference_check(kvm->memslots,
 259                         srcu_read_lock_held(&kvm->srcu)
 260                         || lockdep_is_held(&kvm->slots_lock));
 261 }
 262
 263 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 264 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 265 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 266
 267 extern struct page *bad_page;
 268 extern pfn_t bad_pfn;
 269
 270 int is_error_page(struct page *page);
 271 int is_error_pfn(pfn_t pfn);
 272 int is_hwpoison_pfn(pfn_t pfn);
 273 int is_fault_pfn(pfn_t pfn);
 274 int kvm_is_error_hva(unsigned long addr);
 275 int kvm_set_memory_region(struct kvm *kvm,
 276                           struct kvm_userspace_memory_region *mem,
 277                           int user_alloc);
 278 int __kvm_set_memory_region(struct kvm *kvm,
 279                             struct kvm_userspace_memory_region *mem,
 280                             int user_alloc);
 281 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 282                                 struct kvm_memory_slot *memslot,
 283                                 struct kvm_memory_slot old,
 284                                 struct kvm_userspace_memory_region *mem,
 285                                 int user_alloc);
 286 void kvm_arch_commit_memory_region(struct kvm *kvm,
 287                                 struct kvm_userspace_memory_region *mem,
 288                                 struct kvm_memory_slot old,
 289                                 int user_alloc);
 290 void kvm_disable_largepages(void);
 291 void kvm_arch_flush_shadow(struct kvm *kvm);
 292
 293 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
 294                             int nr_pages);
 295
 296 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 297 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 298 void kvm_release_page_clean(struct page *page);
 299 void kvm_release_page_dirty(struct page *page);
 300 void kvm_set_page_dirty(struct page *page);
 301 void kvm_set_page_accessed(struct page *page);
 302
 303 pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr);
 304 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
 305 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 306 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
 307                          struct kvm_memory_slot *slot, gfn_t gfn);
 308 int memslot_id(struct kvm *kvm, gfn_t gfn);
 309 void kvm_release_pfn_dirty(pfn_t);
 310 void kvm_release_pfn_clean(pfn_t pfn);
 311 void kvm_set_pfn_dirty(pfn_t pfn);
 312 void kvm_set_pfn_accessed(pfn_t pfn);
 313 void kvm_get_pfn(pfn_t pfn);
 314
 315 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 316                         int len);
 317 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 318                           unsigned long len);
 319 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 320 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 321                          int offset, int len);
 322 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 323                     unsigned long len);
 324 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 325 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 326 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 327 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 328 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
 329 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 330
 331 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 332 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
 333 void kvm_resched(struct kvm_vcpu *vcpu);
 334 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 335 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 336 void kvm_flush_remote_tlbs(struct kvm *kvm);
 337 void kvm_reload_remote_mmus(struct kvm *kvm);
 338
 339 long kvm_arch_dev_ioctl(struct file *filp,
 340                         unsigned int ioctl, unsigned long arg);
 341 long kvm_arch_vcpu_ioctl(struct file *filp,
 342                          unsigned int ioctl, unsigned long arg);
 343
 344 int kvm_dev_ioctl_check_extension(long ext);
 345
 346 int kvm_get_dirty_log(struct kvm *kvm,
 347                         struct kvm_dirty_log *log, int *is_dirty);
 348 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 349                                 struct kvm_dirty_log *log);
 350
 351 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 352                                    struct
 353                                    kvm_userspace_memory_region *mem,
 354                                    int user_alloc);
 355 long kvm_arch_vm_ioctl(struct file *filp,
 356                        unsigned int ioctl, unsigned long arg);
 357
 358 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 359 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 360
 361 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 362                                     struct kvm_translation *tr);
 363
 364 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 365 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 366 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 367                                   struct kvm_sregs *sregs);
 368 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 369                                   struct kvm_sregs *sregs);
 370 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 371                                     struct kvm_mp_state *mp_state);
 372 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 373                                     struct kvm_mp_state *mp_state);
 374 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 375                                         struct kvm_guest_debug *dbg);
 376 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 377
 378 int kvm_arch_init(void *opaque);
 379 void kvm_arch_exit(void);
 380
 381 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 382 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 383
 384 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 385 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 386 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 387 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 388 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 389 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 390
 391 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 392 int kvm_arch_hardware_enable(void *garbage);
 393 void kvm_arch_hardware_disable(void *garbage);
 394 int kvm_arch_hardware_setup(void);
 395 void kvm_arch_hardware_unsetup(void);
 396 void kvm_arch_check_processor_compat(void *rtn);
 397 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 398
 399 void kvm_free_physmem(struct kvm *kvm);
 400
 401 struct  kvm *kvm_arch_create_vm(void);
 402 void kvm_arch_destroy_vm(struct kvm *kvm);
 403 void kvm_free_all_assigned_devices(struct kvm *kvm);
 404 void kvm_arch_sync_events(struct kvm *kvm);
 405
 406 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 407 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 408
 409 int kvm_is_mmio_pfn(pfn_t pfn);
 410
 411 struct kvm_irq_ack_notifier {
 412         struct hlist_node link;
 413         unsigned gsi;
 414         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 415 };
 416
 417 #define KVM_ASSIGNED_MSIX_PENDING               0x1
 418 struct kvm_guest_msix_entry {
 419         u32 vector;
 420         u16 entry;
 421         u16 flags;
 422 };
 423
 424 struct kvm_assigned_dev_kernel {
 425         struct kvm_irq_ack_notifier ack_notifier;
 426         struct work_struct interrupt_work;
 427         struct list_head list;
 428         int assigned_dev_id;
 429         int host_segnr;
 430         int host_busnr;
 431         int host_devfn;
 432         unsigned int entries_nr;
 433         int host_irq;
 434         bool host_irq_disabled;
 435         struct msix_entry *host_msix_entries;
 436         int guest_irq;
 437         struct kvm_guest_msix_entry *guest_msix_entries;
 438         unsigned long irq_requested_type;
 439         int irq_source_id;
 440         int flags;
 441         struct pci_dev *dev;
 442         struct kvm *kvm;
 443         spinlock_t assigned_dev_lock;
 444 };
 445
 446 struct kvm_irq_mask_notifier {
 447         void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
 448         int irq;
 449         struct hlist_node link;
 450 };
 451
 452 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 453                                     struct kvm_irq_mask_notifier *kimn);
 454 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 455                                       struct kvm_irq_mask_notifier *kimn);
 456 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
 457                              bool mask);
 458
 459 #ifdef __KVM_HAVE_IOAPIC
 460 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
 461                                    union kvm_ioapic_redirect_entry *entry,
 462                                    unsigned long *deliver_bitmask);
 463 #endif
 464 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
 465 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 466 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 467                                    struct kvm_irq_ack_notifier *kian);
 468 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 469                                    struct kvm_irq_ack_notifier *kian);
 470 int kvm_request_irq_source_id(struct kvm *kvm);
 471 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 472
 473 /* For vcpu->arch.iommu_flags */
 474 #define KVM_IOMMU_CACHE_COHERENCY       0x1
 475
 476 #ifdef CONFIG_IOMMU_API
 477 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 478 int kvm_iommu_map_guest(struct kvm *kvm);
 479 int kvm_iommu_unmap_guest(struct kvm *kvm);
 480 int kvm_assign_device(struct kvm *kvm,
 481                       struct kvm_assigned_dev_kernel *assigned_dev);
 482 int kvm_deassign_device(struct kvm *kvm,
 483                         struct kvm_assigned_dev_kernel *assigned_dev);
 484 #else /* CONFIG_IOMMU_API */
 485 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 486                                       struct kvm_memory_slot *slot)
 487 {
 488         return 0;
 489 }
 490
 491 static inline int kvm_iommu_map_guest(struct kvm *kvm)
 492 {
 493         return -ENODEV;
 494 }
 495
 496 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 497 {
 498         return 0;
 499 }
 500
 501 static inline int kvm_assign_device(struct kvm *kvm,
 502                 struct kvm_assigned_dev_kernel *assigned_dev)
 503 {
 504         return 0;
 505 }
 506
 507 static inline int kvm_deassign_device(struct kvm *kvm,
 508                 struct kvm_assigned_dev_kernel *assigned_dev)
 509 {
 510         return 0;
 511 }
 512 #endif /* CONFIG_IOMMU_API */
 513
 514 static inline void kvm_guest_enter(void)
 515 {
 516         account_system_vtime(current);
 517         current->flags |= PF_VCPU;
 518 }
 519
 520 static inline void kvm_guest_exit(void)
 521 {
 522         account_system_vtime(current);
 523         current->flags &= ~PF_VCPU;
 524 }
 525
 526 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
 527                                                gfn_t gfn)
 528 {
 529         return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
 530 }
 531
 532 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 533 {
 534         return (gpa_t)gfn << PAGE_SHIFT;
 535 }
 536
 537 static inline gfn_t gpa_to_gfn(gpa_t gpa)
 538 {
 539         return (gfn_t)(gpa >> PAGE_SHIFT);
 540 }
 541
 542 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 543 {
 544         return (hpa_t)pfn << PAGE_SHIFT;
 545 }
 546
 547 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 548 {
 549         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 550 }
 551
 552 enum kvm_stat_kind {
 553         KVM_STAT_VM,
 554         KVM_STAT_VCPU,
 555 };
 556
 557 struct kvm_stats_debugfs_item {
 558         const char *name;
 559         int offset;
 560         enum kvm_stat_kind kind;
 561         struct dentry *dentry;
 562 };
 563 extern struct kvm_stats_debugfs_item debugfs_entries[];
 564 extern struct dentry *kvm_debugfs_dir;
 565
 566 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 567 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
 568 {
 569         if (unlikely(vcpu->kvm->mmu_notifier_count))
 570                 return 1;
 571         /*
 572          * Both reads happen under the mmu_lock and both values are
 573          * modified under mmu_lock, so there's no need of smb_rmb()
 574          * here in between, otherwise mmu_notifier_count should be
 575          * read before mmu_notifier_seq, see
 576          * mmu_notifier_invalidate_range_end write side.
 577          */
 578         if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
 579                 return 1;
 580         return 0;
 581 }
 582 #endif
 583
 584 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 585
 586 #define KVM_MAX_IRQ_ROUTES 1024
 587
 588 int kvm_setup_default_irq_routing(struct kvm *kvm);
 589 int kvm_set_irq_routing(struct kvm *kvm,
 590                         const struct kvm_irq_routing_entry *entries,
 591                         unsigned nr,
 592                         unsigned flags);
 593 void kvm_free_irq_routing(struct kvm *kvm);
 594
 595 #else
 596
 597 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 598
 599 #endif
 600
 601 #ifdef CONFIG_HAVE_KVM_EVENTFD
 602
 603 void kvm_eventfd_init(struct kvm *kvm);
 604 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
 605 void kvm_irqfd_release(struct kvm *kvm);
 606 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
 607
 608 #else
 609
 610 static inline void kvm_eventfd_init(struct kvm *kvm) {}
 611 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
 612 {
 613         return -EINVAL;
 614 }
 615
 616 static inline void kvm_irqfd_release(struct kvm *kvm) {}
 617 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
 618 {
 619         return -ENOSYS;
 620 }
 621
 622 #endif /* CONFIG_HAVE_KVM_EVENTFD */
 623
 624 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 625 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
 626 {
 627         return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
 628 }
 629 #endif
 630
 631 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
 632
 633 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 634                                   unsigned long arg);
 635
 636 #else
 637
 638 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 639                                                 unsigned long arg)
 640 {
 641         return -ENOTTY;
 642 }
 643
 644 #endif
 645
 646 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
 647 {
 648         set_bit(req, &vcpu->requests);
 649 }
 650
 651 static inline bool kvm_make_check_request(int req, struct kvm_vcpu *vcpu)
 652 {
 653         return test_and_set_bit(req, &vcpu->requests);
 654 }
 655
 656 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
 657 {
 658         if (test_bit(req, &vcpu->requests)) {
 659                 clear_bit(req, &vcpu->requests);
 660                 return true;
 661         } else {
 662                 return false;
 663         }
 664 }
 665
 666 #endif
 667