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
56 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
60 extern struct kmem_cache *kvm_vcpu_cache;
65 struct kvm_io_device *dev;
70 #define NR_IOBUS_DEVS 300
71 struct kvm_io_range range[NR_IOBUS_DEVS];
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,
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);
89 #ifdef CONFIG_KVM_ASYNC_PF
91 struct work_struct work;
92 struct list_head link;
93 struct list_head queue;
94 struct kvm_vcpu *vcpu;
98 struct kvm_arch_async_pf arch;
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);
118 #ifdef CONFIG_PREEMPT_NOTIFIERS
119 struct preempt_notifier preempt_notifier;
125 unsigned long requests;
126 unsigned long guest_debug;
132 int guest_fpu_loaded, guest_xcr0_loaded;
133 wait_queue_head_t wq;
137 struct kvm_vcpu_stat stat;
139 #ifdef CONFIG_HAS_IOMEM
141 int mmio_read_completed;
145 unsigned char mmio_data[KVM_MMIO_SIZE];
146 gpa_t mmio_phys_addr;
149 #ifdef CONFIG_KVM_ASYNC_PF
152 struct list_head queue;
153 struct list_head done;
158 struct kvm_vcpu_arch arch;
161 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
163 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
167 * Some of the bitops functions do not support too long bitmaps.
168 * This number must be determined not to exceed such limits.
170 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
172 struct kvm_lpage_info {
173 unsigned long rmap_pde;
177 struct kvm_memory_slot {
179 unsigned long npages;
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;
191 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
193 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
196 struct kvm_kernel_irq_routing_entry {
199 int (*set)(struct kvm_kernel_irq_routing_entry *e,
200 struct kvm *kvm, int irq_source_id, int level);
208 struct hlist_node link;
211 #ifdef __KVM_HAVE_IOAPIC
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;
218 * Array indexed by gsi. Each entry contains list of irq chips
219 * the gsi is connected to.
221 struct hlist_head map[0];
226 struct kvm_irq_routing_table {};
230 #ifndef KVM_MEM_SLOTS_NUM
231 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
236 * memslots are not sorted by id anymore, please use id_to_memslot()
237 * to get the memslot by its id.
239 struct kvm_memslots {
241 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
246 struct mutex slots_lock;
247 struct mm_struct *mm; /* userspace tied to this vm */
248 struct kvm_memslots *memslots;
249 struct srcu_struct srcu;
250 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
252 struct kvm_vcpu *bsp_vcpu;
254 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
255 atomic_t online_vcpus;
256 int last_boosted_vcpu;
257 struct list_head vm_list;
259 struct kvm_io_bus *buses[KVM_NR_BUSES];
260 #ifdef CONFIG_HAVE_KVM_EVENTFD
263 struct list_head items;
265 struct list_head ioeventfds;
267 struct kvm_vm_stat stat;
268 struct kvm_arch arch;
269 atomic_t users_count;
270 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
271 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
272 spinlock_t ring_lock;
273 struct list_head coalesced_zones;
276 struct mutex irq_lock;
277 #ifdef CONFIG_HAVE_KVM_IRQCHIP
279 * Update side is protected by irq_lock and,
280 * if configured, irqfds.lock.
282 struct kvm_irq_routing_table __rcu *irq_routing;
283 struct hlist_head mask_notifier_list;
284 struct hlist_head irq_ack_notifier_list;
287 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
288 struct mmu_notifier mmu_notifier;
289 unsigned long mmu_notifier_seq;
290 long mmu_notifier_count;
295 /* The guest did something we don't support. */
296 #define pr_unimpl(vcpu, fmt, ...) \
297 pr_err_ratelimited("kvm: %i: cpu%i " fmt, \
298 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__)
300 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
301 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
303 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
306 return kvm->vcpus[i];
309 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
311 idx < atomic_read(&kvm->online_vcpus) && \
312 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
315 #define kvm_for_each_memslot(memslot, slots) \
316 for (memslot = &slots->memslots[0]; \
317 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
320 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
321 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
323 void vcpu_load(struct kvm_vcpu *vcpu);
324 void vcpu_put(struct kvm_vcpu *vcpu);
326 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
327 struct module *module);
330 void kvm_get_kvm(struct kvm *kvm);
331 void kvm_put_kvm(struct kvm *kvm);
332 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
334 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
336 return rcu_dereference_check(kvm->memslots,
337 srcu_read_lock_held(&kvm->srcu)
338 || lockdep_is_held(&kvm->slots_lock));
341 static inline struct kvm_memory_slot *
342 id_to_memslot(struct kvm_memslots *slots, int id)
346 for (i = 0; i < KVM_MEM_SLOTS_NUM; i++)
347 if (slots->memslots[i].id == id)
348 return &slots->memslots[i];
354 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
355 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
356 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
358 extern struct page *bad_page;
359 extern struct page *fault_page;
361 extern pfn_t bad_pfn;
362 extern pfn_t fault_pfn;
364 int is_error_page(struct page *page);
365 int is_error_pfn(pfn_t pfn);
366 int is_hwpoison_pfn(pfn_t pfn);
367 int is_fault_pfn(pfn_t pfn);
368 int is_noslot_pfn(pfn_t pfn);
369 int is_invalid_pfn(pfn_t pfn);
370 int kvm_is_error_hva(unsigned long addr);
371 int kvm_set_memory_region(struct kvm *kvm,
372 struct kvm_userspace_memory_region *mem,
374 int __kvm_set_memory_region(struct kvm *kvm,
375 struct kvm_userspace_memory_region *mem,
377 int kvm_arch_prepare_memory_region(struct kvm *kvm,
378 struct kvm_memory_slot *memslot,
379 struct kvm_memory_slot old,
380 struct kvm_userspace_memory_region *mem,
382 void kvm_arch_commit_memory_region(struct kvm *kvm,
383 struct kvm_userspace_memory_region *mem,
384 struct kvm_memory_slot old,
386 void kvm_disable_largepages(void);
387 void kvm_arch_flush_shadow(struct kvm *kvm);
389 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
392 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
393 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
394 void kvm_release_page_clean(struct page *page);
395 void kvm_release_page_dirty(struct page *page);
396 void kvm_set_page_dirty(struct page *page);
397 void kvm_set_page_accessed(struct page *page);
399 pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr);
400 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
401 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
402 bool write_fault, bool *writable);
403 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
404 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
406 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
407 struct kvm_memory_slot *slot, gfn_t gfn);
408 void kvm_release_pfn_dirty(pfn_t);
409 void kvm_release_pfn_clean(pfn_t pfn);
410 void kvm_set_pfn_dirty(pfn_t pfn);
411 void kvm_set_pfn_accessed(pfn_t pfn);
412 void kvm_get_pfn(pfn_t pfn);
414 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
416 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
418 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
419 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
420 void *data, unsigned long len);
421 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
422 int offset, int len);
423 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
425 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
426 void *data, unsigned long len);
427 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
429 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
430 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
431 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
432 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
433 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
434 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
435 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
438 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
439 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
440 void kvm_resched(struct kvm_vcpu *vcpu);
441 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
442 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
444 void kvm_flush_remote_tlbs(struct kvm *kvm);
445 void kvm_reload_remote_mmus(struct kvm *kvm);
447 long kvm_arch_dev_ioctl(struct file *filp,
448 unsigned int ioctl, unsigned long arg);
449 long kvm_arch_vcpu_ioctl(struct file *filp,
450 unsigned int ioctl, unsigned long arg);
452 int kvm_dev_ioctl_check_extension(long ext);
454 int kvm_get_dirty_log(struct kvm *kvm,
455 struct kvm_dirty_log *log, int *is_dirty);
456 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
457 struct kvm_dirty_log *log);
459 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
461 kvm_userspace_memory_region *mem,
463 long kvm_arch_vm_ioctl(struct file *filp,
464 unsigned int ioctl, unsigned long arg);
466 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
467 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
469 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
470 struct kvm_translation *tr);
472 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
473 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
474 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
475 struct kvm_sregs *sregs);
476 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
477 struct kvm_sregs *sregs);
478 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
479 struct kvm_mp_state *mp_state);
480 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
481 struct kvm_mp_state *mp_state);
482 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
483 struct kvm_guest_debug *dbg);
484 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
486 int kvm_arch_init(void *opaque);
487 void kvm_arch_exit(void);
489 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
490 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
492 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
493 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
494 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
495 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
496 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
497 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
499 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
500 int kvm_arch_hardware_enable(void *garbage);
501 void kvm_arch_hardware_disable(void *garbage);
502 int kvm_arch_hardware_setup(void);
503 void kvm_arch_hardware_unsetup(void);
504 void kvm_arch_check_processor_compat(void *rtn);
505 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
507 void kvm_free_physmem(struct kvm *kvm);
509 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
510 static inline struct kvm *kvm_arch_alloc_vm(void)
512 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
515 static inline void kvm_arch_free_vm(struct kvm *kvm)
521 int kvm_arch_init_vm(struct kvm *kvm);
522 void kvm_arch_destroy_vm(struct kvm *kvm);
523 void kvm_free_all_assigned_devices(struct kvm *kvm);
524 void kvm_arch_sync_events(struct kvm *kvm);
526 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
527 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
529 int kvm_is_mmio_pfn(pfn_t pfn);
531 struct kvm_irq_ack_notifier {
532 struct hlist_node link;
534 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
537 struct kvm_assigned_dev_kernel {
538 struct kvm_irq_ack_notifier ack_notifier;
539 struct list_head list;
544 unsigned int entries_nr;
546 bool host_irq_disabled;
547 struct msix_entry *host_msix_entries;
549 struct msix_entry *guest_msix_entries;
550 unsigned long irq_requested_type;
555 spinlock_t intx_lock;
557 struct pci_saved_state *pci_saved_state;
560 struct kvm_irq_mask_notifier {
561 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
563 struct hlist_node link;
566 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
567 struct kvm_irq_mask_notifier *kimn);
568 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
569 struct kvm_irq_mask_notifier *kimn);
570 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
573 #ifdef __KVM_HAVE_IOAPIC
574 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
575 union kvm_ioapic_redirect_entry *entry,
576 unsigned long *deliver_bitmask);
578 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
579 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
580 int irq_source_id, int level);
581 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
582 void kvm_register_irq_ack_notifier(struct kvm *kvm,
583 struct kvm_irq_ack_notifier *kian);
584 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
585 struct kvm_irq_ack_notifier *kian);
586 int kvm_request_irq_source_id(struct kvm *kvm);
587 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
589 /* For vcpu->arch.iommu_flags */
590 #define KVM_IOMMU_CACHE_COHERENCY 0x1
592 #ifdef CONFIG_IOMMU_API
593 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
594 int kvm_iommu_map_guest(struct kvm *kvm);
595 int kvm_iommu_unmap_guest(struct kvm *kvm);
596 int kvm_assign_device(struct kvm *kvm,
597 struct kvm_assigned_dev_kernel *assigned_dev);
598 int kvm_deassign_device(struct kvm *kvm,
599 struct kvm_assigned_dev_kernel *assigned_dev);
600 #else /* CONFIG_IOMMU_API */
601 static inline int kvm_iommu_map_pages(struct kvm *kvm,
602 struct kvm_memory_slot *slot)
607 static inline int kvm_iommu_map_guest(struct kvm *kvm)
612 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
617 static inline int kvm_assign_device(struct kvm *kvm,
618 struct kvm_assigned_dev_kernel *assigned_dev)
623 static inline int kvm_deassign_device(struct kvm *kvm,
624 struct kvm_assigned_dev_kernel *assigned_dev)
628 #endif /* CONFIG_IOMMU_API */
630 static inline void kvm_guest_enter(void)
632 BUG_ON(preemptible());
633 account_system_vtime(current);
634 current->flags |= PF_VCPU;
635 /* KVM does not hold any references to rcu protected data when it
636 * switches CPU into a guest mode. In fact switching to a guest mode
637 * is very similar to exiting to userspase from rcu point of view. In
638 * addition CPU may stay in a guest mode for quite a long time (up to
639 * one time slice). Lets treat guest mode as quiescent state, just like
640 * we do with user-mode execution.
642 rcu_virt_note_context_switch(smp_processor_id());
645 static inline void kvm_guest_exit(void)
647 account_system_vtime(current);
648 current->flags &= ~PF_VCPU;
651 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
653 return gfn_to_memslot(kvm, gfn)->id;
656 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
659 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
662 static inline gpa_t gfn_to_gpa(gfn_t gfn)
664 return (gpa_t)gfn << PAGE_SHIFT;
667 static inline gfn_t gpa_to_gfn(gpa_t gpa)
669 return (gfn_t)(gpa >> PAGE_SHIFT);
672 static inline hpa_t pfn_to_hpa(pfn_t pfn)
674 return (hpa_t)pfn << PAGE_SHIFT;
677 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
679 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
687 struct kvm_stats_debugfs_item {
690 enum kvm_stat_kind kind;
691 struct dentry *dentry;
693 extern struct kvm_stats_debugfs_item debugfs_entries[];
694 extern struct dentry *kvm_debugfs_dir;
696 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
697 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
699 if (unlikely(vcpu->kvm->mmu_notifier_count))
702 * Both reads happen under the mmu_lock and both values are
703 * modified under mmu_lock, so there's no need of smb_rmb()
704 * here in between, otherwise mmu_notifier_count should be
705 * read before mmu_notifier_seq, see
706 * mmu_notifier_invalidate_range_end write side.
708 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
714 #ifdef CONFIG_HAVE_KVM_IRQCHIP
716 #define KVM_MAX_IRQ_ROUTES 1024
718 int kvm_setup_default_irq_routing(struct kvm *kvm);
719 int kvm_set_irq_routing(struct kvm *kvm,
720 const struct kvm_irq_routing_entry *entries,
723 void kvm_free_irq_routing(struct kvm *kvm);
727 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
731 #ifdef CONFIG_HAVE_KVM_EVENTFD
733 void kvm_eventfd_init(struct kvm *kvm);
734 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
735 void kvm_irqfd_release(struct kvm *kvm);
736 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
737 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
741 static inline void kvm_eventfd_init(struct kvm *kvm) {}
743 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
748 static inline void kvm_irqfd_release(struct kvm *kvm) {}
750 #ifdef CONFIG_HAVE_KVM_IRQCHIP
751 static inline void kvm_irq_routing_update(struct kvm *kvm,
752 struct kvm_irq_routing_table *irq_rt)
754 rcu_assign_pointer(kvm->irq_routing, irq_rt);
758 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
763 #endif /* CONFIG_HAVE_KVM_EVENTFD */
765 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
766 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
768 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
772 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
774 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
779 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
787 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
789 set_bit(req, &vcpu->requests);
792 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
794 if (test_bit(req, &vcpu->requests)) {
795 clear_bit(req, &vcpu->requests);