5 * This work is licensed under the terms of the GNU GPL, version 2. See
6 * the COPYING file in the top-level directory.
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>
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>
25 #include <linux/kvm.h>
26 #include <linux/kvm_para.h>
28 #include <linux/kvm_types.h>
30 #include <asm/kvm_host.h>
33 #define KVM_MMIO_SIZE 8
37 * vcpu->requests bit members
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 #define KVM_REQ_PMU 16
56 #define KVM_REQ_PMI 17
58 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
62 extern struct kmem_cache *kvm_vcpu_cache;
67 struct kvm_io_device *dev;
72 #define NR_IOBUS_DEVS 300
73 struct kvm_io_range range[NR_IOBUS_DEVS];
82 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
83 int len, const void *val);
84 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
86 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
87 int len, struct kvm_io_device *dev);
88 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
89 struct kvm_io_device *dev);
91 #ifdef CONFIG_KVM_ASYNC_PF
93 struct work_struct work;
94 struct list_head link;
95 struct list_head queue;
96 struct kvm_vcpu *vcpu;
100 struct kvm_arch_async_pf arch;
105 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
106 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
107 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
108 struct kvm_arch_async_pf *arch);
109 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
120 #ifdef CONFIG_PREEMPT_NOTIFIERS
121 struct preempt_notifier preempt_notifier;
127 unsigned long requests;
128 unsigned long guest_debug;
134 int guest_fpu_loaded, guest_xcr0_loaded;
135 wait_queue_head_t wq;
139 struct kvm_vcpu_stat stat;
141 #ifdef CONFIG_HAS_IOMEM
143 int mmio_read_completed;
147 unsigned char mmio_data[KVM_MMIO_SIZE];
148 gpa_t mmio_phys_addr;
151 #ifdef CONFIG_KVM_ASYNC_PF
154 struct list_head queue;
155 struct list_head done;
160 struct kvm_vcpu_arch arch;
163 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
165 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
169 * Some of the bitops functions do not support too long bitmaps.
170 * This number must be determined not to exceed such limits.
172 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
174 struct kvm_lpage_info {
175 unsigned long rmap_pde;
179 struct kvm_memory_slot {
181 unsigned long npages;
184 unsigned long *dirty_bitmap;
185 unsigned long *dirty_bitmap_head;
186 unsigned long nr_dirty_pages;
187 struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1];
188 unsigned long userspace_addr;
193 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
195 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
198 struct kvm_kernel_irq_routing_entry {
201 int (*set)(struct kvm_kernel_irq_routing_entry *e,
202 struct kvm *kvm, int irq_source_id, int level);
210 struct hlist_node link;
213 #ifdef __KVM_HAVE_IOAPIC
215 struct kvm_irq_routing_table {
216 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
217 struct kvm_kernel_irq_routing_entry *rt_entries;
220 * Array indexed by gsi. Each entry contains list of irq chips
221 * the gsi is connected to.
223 struct hlist_head map[0];
228 struct kvm_irq_routing_table {};
232 #ifndef KVM_MEM_SLOTS_NUM
233 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
238 * memslots are not sorted by id anymore, please use id_to_memslot()
239 * to get the memslot by its id.
241 struct kvm_memslots {
243 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
244 /* The mapping table from slot id to the index in memslots[]. */
245 int id_to_index[KVM_MEM_SLOTS_NUM];
250 struct mutex slots_lock;
251 struct mm_struct *mm; /* userspace tied to this vm */
252 struct kvm_memslots *memslots;
253 struct srcu_struct srcu;
254 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
257 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
258 atomic_t online_vcpus;
259 int last_boosted_vcpu;
260 struct list_head vm_list;
262 struct kvm_io_bus *buses[KVM_NR_BUSES];
263 #ifdef CONFIG_HAVE_KVM_EVENTFD
266 struct list_head items;
268 struct list_head ioeventfds;
270 struct kvm_vm_stat stat;
271 struct kvm_arch arch;
272 atomic_t users_count;
273 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
274 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
275 spinlock_t ring_lock;
276 struct list_head coalesced_zones;
279 struct mutex irq_lock;
280 #ifdef CONFIG_HAVE_KVM_IRQCHIP
282 * Update side is protected by irq_lock and,
283 * if configured, irqfds.lock.
285 struct kvm_irq_routing_table __rcu *irq_routing;
286 struct hlist_head mask_notifier_list;
287 struct hlist_head irq_ack_notifier_list;
290 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
291 struct mmu_notifier mmu_notifier;
292 unsigned long mmu_notifier_seq;
293 long mmu_notifier_count;
298 /* The guest did something we don't support. */
299 #define pr_unimpl(vcpu, fmt, ...) \
300 pr_err_ratelimited("kvm: %i: cpu%i " fmt, \
301 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__)
303 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
304 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
306 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
309 return kvm->vcpus[i];
312 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
314 idx < atomic_read(&kvm->online_vcpus) && \
315 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
318 #define kvm_for_each_memslot(memslot, slots) \
319 for (memslot = &slots->memslots[0]; \
320 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
323 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
324 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
326 void vcpu_load(struct kvm_vcpu *vcpu);
327 void vcpu_put(struct kvm_vcpu *vcpu);
329 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
330 struct module *module);
333 void kvm_get_kvm(struct kvm *kvm);
334 void kvm_put_kvm(struct kvm *kvm);
335 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
337 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
339 return rcu_dereference_check(kvm->memslots,
340 srcu_read_lock_held(&kvm->srcu)
341 || lockdep_is_held(&kvm->slots_lock));
344 static inline struct kvm_memory_slot *
345 id_to_memslot(struct kvm_memslots *slots, int id)
347 int index = slots->id_to_index[id];
348 struct kvm_memory_slot *slot;
350 slot = &slots->memslots[index];
352 WARN_ON(slot->id != id);
356 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
357 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
358 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
360 extern struct page *bad_page;
361 extern struct page *fault_page;
363 extern pfn_t bad_pfn;
364 extern pfn_t fault_pfn;
366 int is_error_page(struct page *page);
367 int is_error_pfn(pfn_t pfn);
368 int is_hwpoison_pfn(pfn_t pfn);
369 int is_fault_pfn(pfn_t pfn);
370 int is_noslot_pfn(pfn_t pfn);
371 int is_invalid_pfn(pfn_t pfn);
372 int kvm_is_error_hva(unsigned long addr);
373 int kvm_set_memory_region(struct kvm *kvm,
374 struct kvm_userspace_memory_region *mem,
376 int __kvm_set_memory_region(struct kvm *kvm,
377 struct kvm_userspace_memory_region *mem,
379 int kvm_arch_prepare_memory_region(struct kvm *kvm,
380 struct kvm_memory_slot *memslot,
381 struct kvm_memory_slot old,
382 struct kvm_userspace_memory_region *mem,
384 void kvm_arch_commit_memory_region(struct kvm *kvm,
385 struct kvm_userspace_memory_region *mem,
386 struct kvm_memory_slot old,
388 void kvm_disable_largepages(void);
389 void kvm_arch_flush_shadow(struct kvm *kvm);
391 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
394 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
395 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
396 void kvm_release_page_clean(struct page *page);
397 void kvm_release_page_dirty(struct page *page);
398 void kvm_set_page_dirty(struct page *page);
399 void kvm_set_page_accessed(struct page *page);
401 pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr);
402 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
403 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
404 bool write_fault, bool *writable);
405 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
406 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
408 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
409 struct kvm_memory_slot *slot, gfn_t gfn);
410 void kvm_release_pfn_dirty(pfn_t);
411 void kvm_release_pfn_clean(pfn_t pfn);
412 void kvm_set_pfn_dirty(pfn_t pfn);
413 void kvm_set_pfn_accessed(pfn_t pfn);
414 void kvm_get_pfn(pfn_t pfn);
416 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
418 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
420 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
421 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
422 void *data, unsigned long len);
423 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
424 int offset, int len);
425 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
427 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
428 void *data, unsigned long len);
429 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
431 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
432 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
433 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
434 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
435 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
436 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
437 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
440 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
441 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
442 void kvm_resched(struct kvm_vcpu *vcpu);
443 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
444 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
446 void kvm_flush_remote_tlbs(struct kvm *kvm);
447 void kvm_reload_remote_mmus(struct kvm *kvm);
449 long kvm_arch_dev_ioctl(struct file *filp,
450 unsigned int ioctl, unsigned long arg);
451 long kvm_arch_vcpu_ioctl(struct file *filp,
452 unsigned int ioctl, unsigned long arg);
454 int kvm_dev_ioctl_check_extension(long ext);
456 int kvm_get_dirty_log(struct kvm *kvm,
457 struct kvm_dirty_log *log, int *is_dirty);
458 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
459 struct kvm_dirty_log *log);
461 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
463 kvm_userspace_memory_region *mem,
465 long kvm_arch_vm_ioctl(struct file *filp,
466 unsigned int ioctl, unsigned long arg);
468 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
469 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
471 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
472 struct kvm_translation *tr);
474 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
475 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
476 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
477 struct kvm_sregs *sregs);
478 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
479 struct kvm_sregs *sregs);
480 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
481 struct kvm_mp_state *mp_state);
482 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
483 struct kvm_mp_state *mp_state);
484 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
485 struct kvm_guest_debug *dbg);
486 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
488 int kvm_arch_init(void *opaque);
489 void kvm_arch_exit(void);
491 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
492 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
494 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
495 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
496 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
497 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
498 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
499 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
501 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
502 int kvm_arch_hardware_enable(void *garbage);
503 void kvm_arch_hardware_disable(void *garbage);
504 int kvm_arch_hardware_setup(void);
505 void kvm_arch_hardware_unsetup(void);
506 void kvm_arch_check_processor_compat(void *rtn);
507 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
509 void kvm_free_physmem(struct kvm *kvm);
511 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
512 static inline struct kvm *kvm_arch_alloc_vm(void)
514 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
517 static inline void kvm_arch_free_vm(struct kvm *kvm)
523 int kvm_arch_init_vm(struct kvm *kvm);
524 void kvm_arch_destroy_vm(struct kvm *kvm);
525 void kvm_free_all_assigned_devices(struct kvm *kvm);
526 void kvm_arch_sync_events(struct kvm *kvm);
528 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
529 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
531 int kvm_is_mmio_pfn(pfn_t pfn);
533 struct kvm_irq_ack_notifier {
534 struct hlist_node link;
536 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
539 struct kvm_assigned_dev_kernel {
540 struct kvm_irq_ack_notifier ack_notifier;
541 struct list_head list;
546 unsigned int entries_nr;
548 bool host_irq_disabled;
549 struct msix_entry *host_msix_entries;
551 struct msix_entry *guest_msix_entries;
552 unsigned long irq_requested_type;
557 spinlock_t intx_lock;
559 struct pci_saved_state *pci_saved_state;
562 struct kvm_irq_mask_notifier {
563 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
565 struct hlist_node link;
568 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
569 struct kvm_irq_mask_notifier *kimn);
570 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
571 struct kvm_irq_mask_notifier *kimn);
572 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
575 #ifdef __KVM_HAVE_IOAPIC
576 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
577 union kvm_ioapic_redirect_entry *entry,
578 unsigned long *deliver_bitmask);
580 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
581 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
582 int irq_source_id, int level);
583 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
584 void kvm_register_irq_ack_notifier(struct kvm *kvm,
585 struct kvm_irq_ack_notifier *kian);
586 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
587 struct kvm_irq_ack_notifier *kian);
588 int kvm_request_irq_source_id(struct kvm *kvm);
589 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
591 /* For vcpu->arch.iommu_flags */
592 #define KVM_IOMMU_CACHE_COHERENCY 0x1
594 #ifdef CONFIG_IOMMU_API
595 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
596 int kvm_iommu_map_guest(struct kvm *kvm);
597 int kvm_iommu_unmap_guest(struct kvm *kvm);
598 int kvm_assign_device(struct kvm *kvm,
599 struct kvm_assigned_dev_kernel *assigned_dev);
600 int kvm_deassign_device(struct kvm *kvm,
601 struct kvm_assigned_dev_kernel *assigned_dev);
602 #else /* CONFIG_IOMMU_API */
603 static inline int kvm_iommu_map_pages(struct kvm *kvm,
604 struct kvm_memory_slot *slot)
609 static inline int kvm_iommu_map_guest(struct kvm *kvm)
614 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
619 static inline int kvm_assign_device(struct kvm *kvm,
620 struct kvm_assigned_dev_kernel *assigned_dev)
625 static inline int kvm_deassign_device(struct kvm *kvm,
626 struct kvm_assigned_dev_kernel *assigned_dev)
630 #endif /* CONFIG_IOMMU_API */
632 static inline void kvm_guest_enter(void)
634 BUG_ON(preemptible());
635 account_system_vtime(current);
636 current->flags |= PF_VCPU;
637 /* KVM does not hold any references to rcu protected data when it
638 * switches CPU into a guest mode. In fact switching to a guest mode
639 * is very similar to exiting to userspase from rcu point of view. In
640 * addition CPU may stay in a guest mode for quite a long time (up to
641 * one time slice). Lets treat guest mode as quiescent state, just like
642 * we do with user-mode execution.
644 rcu_virt_note_context_switch(smp_processor_id());
647 static inline void kvm_guest_exit(void)
649 account_system_vtime(current);
650 current->flags &= ~PF_VCPU;
653 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
655 return gfn_to_memslot(kvm, gfn)->id;
658 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
661 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
664 static inline gpa_t gfn_to_gpa(gfn_t gfn)
666 return (gpa_t)gfn << PAGE_SHIFT;
669 static inline gfn_t gpa_to_gfn(gpa_t gpa)
671 return (gfn_t)(gpa >> PAGE_SHIFT);
674 static inline hpa_t pfn_to_hpa(pfn_t pfn)
676 return (hpa_t)pfn << PAGE_SHIFT;
679 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
681 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
689 struct kvm_stats_debugfs_item {
692 enum kvm_stat_kind kind;
693 struct dentry *dentry;
695 extern struct kvm_stats_debugfs_item debugfs_entries[];
696 extern struct dentry *kvm_debugfs_dir;
698 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
699 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
701 if (unlikely(vcpu->kvm->mmu_notifier_count))
704 * Both reads happen under the mmu_lock and both values are
705 * modified under mmu_lock, so there's no need of smb_rmb()
706 * here in between, otherwise mmu_notifier_count should be
707 * read before mmu_notifier_seq, see
708 * mmu_notifier_invalidate_range_end write side.
710 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
716 #ifdef CONFIG_HAVE_KVM_IRQCHIP
718 #define KVM_MAX_IRQ_ROUTES 1024
720 int kvm_setup_default_irq_routing(struct kvm *kvm);
721 int kvm_set_irq_routing(struct kvm *kvm,
722 const struct kvm_irq_routing_entry *entries,
725 void kvm_free_irq_routing(struct kvm *kvm);
729 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
733 #ifdef CONFIG_HAVE_KVM_EVENTFD
735 void kvm_eventfd_init(struct kvm *kvm);
736 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
737 void kvm_irqfd_release(struct kvm *kvm);
738 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
739 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
743 static inline void kvm_eventfd_init(struct kvm *kvm) {}
745 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
750 static inline void kvm_irqfd_release(struct kvm *kvm) {}
752 #ifdef CONFIG_HAVE_KVM_IRQCHIP
753 static inline void kvm_irq_routing_update(struct kvm *kvm,
754 struct kvm_irq_routing_table *irq_rt)
756 rcu_assign_pointer(kvm->irq_routing, irq_rt);
760 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
765 #endif /* CONFIG_HAVE_KVM_EVENTFD */
767 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
768 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
770 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
774 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
776 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
781 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
789 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
791 set_bit(req, &vcpu->requests);
794 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
796 if (test_bit(req, &vcpu->requests)) {
797 clear_bit(req, &vcpu->requests);