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/preempt.h>
18 #include <linux/msi.h>
19 #include <linux/slab.h>
20 #include <asm/signal.h>
22 #include <linux/kvm.h>
23 #include <linux/kvm_para.h>
25 #include <linux/kvm_types.h>
27 #include <asm/kvm_host.h>
30 * vcpu->requests bit members
32 #define KVM_REQ_TLB_FLUSH 0
33 #define KVM_REQ_MIGRATE_TIMER 1
34 #define KVM_REQ_REPORT_TPR_ACCESS 2
35 #define KVM_REQ_MMU_RELOAD 3
36 #define KVM_REQ_TRIPLE_FAULT 4
37 #define KVM_REQ_PENDING_TIMER 5
38 #define KVM_REQ_UNHALT 6
39 #define KVM_REQ_MMU_SYNC 7
40 #define KVM_REQ_CLOCK_UPDATE 8
41 #define KVM_REQ_KICK 9
42 #define KVM_REQ_DEACTIVATE_FPU 10
43 #define KVM_REQ_EVENT 11
44 #define KVM_REQ_APF_HALT 12
46 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
50 extern struct kmem_cache *kvm_vcpu_cache;
53 * It would be nice to use something smarter than a linear search, TBD...
54 * Thankfully we dont expect many devices to register (famous last words :),
55 * so until then it will suffice. At least its abstracted so we can change
60 #define NR_IOBUS_DEVS 200
61 struct kvm_io_device *devs[NR_IOBUS_DEVS];
70 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
71 int len, const void *val);
72 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
74 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx,
75 struct kvm_io_device *dev);
76 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
77 struct kvm_io_device *dev);
79 #ifdef CONFIG_KVM_ASYNC_PF
81 struct work_struct work;
82 struct list_head link;
83 struct list_head queue;
84 struct kvm_vcpu *vcpu;
88 struct kvm_arch_async_pf arch;
93 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
94 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
95 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
96 struct kvm_arch_async_pf *arch);
97 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
102 #ifdef CONFIG_PREEMPT_NOTIFIERS
103 struct preempt_notifier preempt_notifier;
110 unsigned long requests;
111 unsigned long guest_debug;
115 int guest_fpu_loaded, guest_xcr0_loaded;
116 wait_queue_head_t wq;
119 struct kvm_vcpu_stat stat;
121 #ifdef CONFIG_HAS_IOMEM
123 int mmio_read_completed;
126 unsigned char mmio_data[8];
127 gpa_t mmio_phys_addr;
130 #ifdef CONFIG_KVM_ASYNC_PF
133 struct list_head queue;
134 struct list_head done;
139 struct kvm_vcpu_arch arch;
143 * Some of the bitops functions do not support too long bitmaps.
144 * This number must be determined not to exceed such limits.
146 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
148 struct kvm_memory_slot {
150 unsigned long npages;
153 unsigned long *dirty_bitmap;
154 unsigned long *dirty_bitmap_head;
156 unsigned long rmap_pde;
158 } *lpage_info[KVM_NR_PAGE_SIZES - 1];
159 unsigned long userspace_addr;
164 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
166 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
169 struct kvm_kernel_irq_routing_entry {
172 int (*set)(struct kvm_kernel_irq_routing_entry *e,
173 struct kvm *kvm, int irq_source_id, int level);
181 struct hlist_node link;
184 #ifdef __KVM_HAVE_IOAPIC
186 struct kvm_irq_routing_table {
187 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
188 struct kvm_kernel_irq_routing_entry *rt_entries;
191 * Array indexed by gsi. Each entry contains list of irq chips
192 * the gsi is connected to.
194 struct hlist_head map[0];
199 struct kvm_irq_routing_table {};
203 struct kvm_memslots {
206 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
207 KVM_PRIVATE_MEM_SLOTS];
212 raw_spinlock_t requests_lock;
213 struct mutex slots_lock;
214 struct mm_struct *mm; /* userspace tied to this vm */
215 struct kvm_memslots *memslots;
216 struct srcu_struct srcu;
217 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
219 struct kvm_vcpu *bsp_vcpu;
221 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
222 atomic_t online_vcpus;
223 struct list_head vm_list;
225 struct kvm_io_bus *buses[KVM_NR_BUSES];
226 #ifdef CONFIG_HAVE_KVM_EVENTFD
229 struct list_head items;
231 struct list_head ioeventfds;
233 struct kvm_vm_stat stat;
234 struct kvm_arch arch;
235 atomic_t users_count;
236 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
237 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
238 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
241 struct mutex irq_lock;
242 #ifdef CONFIG_HAVE_KVM_IRQCHIP
243 struct kvm_irq_routing_table __rcu *irq_routing;
244 struct hlist_head mask_notifier_list;
245 struct hlist_head irq_ack_notifier_list;
248 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
249 struct mmu_notifier mmu_notifier;
250 unsigned long mmu_notifier_seq;
251 long mmu_notifier_count;
255 /* The guest did something we don't support. */
256 #define pr_unimpl(vcpu, fmt, ...) \
258 if (printk_ratelimit()) \
259 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
260 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
263 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
264 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
266 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
269 return kvm->vcpus[i];
272 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
273 for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \
274 idx < atomic_read(&kvm->online_vcpus) && vcpup; \
275 vcpup = kvm_get_vcpu(kvm, ++idx))
277 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
278 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
280 void vcpu_load(struct kvm_vcpu *vcpu);
281 void vcpu_put(struct kvm_vcpu *vcpu);
283 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
284 struct module *module);
287 void kvm_get_kvm(struct kvm *kvm);
288 void kvm_put_kvm(struct kvm *kvm);
290 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
292 return rcu_dereference_check(kvm->memslots,
293 srcu_read_lock_held(&kvm->srcu)
294 || lockdep_is_held(&kvm->slots_lock));
297 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
298 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
299 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
301 extern struct page *bad_page;
302 extern pfn_t bad_pfn;
304 int is_error_page(struct page *page);
305 int is_error_pfn(pfn_t pfn);
306 int is_hwpoison_pfn(pfn_t pfn);
307 int is_fault_pfn(pfn_t pfn);
308 int kvm_is_error_hva(unsigned long addr);
309 int kvm_set_memory_region(struct kvm *kvm,
310 struct kvm_userspace_memory_region *mem,
312 int __kvm_set_memory_region(struct kvm *kvm,
313 struct kvm_userspace_memory_region *mem,
315 int kvm_arch_prepare_memory_region(struct kvm *kvm,
316 struct kvm_memory_slot *memslot,
317 struct kvm_memory_slot old,
318 struct kvm_userspace_memory_region *mem,
320 void kvm_arch_commit_memory_region(struct kvm *kvm,
321 struct kvm_userspace_memory_region *mem,
322 struct kvm_memory_slot old,
324 void kvm_disable_largepages(void);
325 void kvm_arch_flush_shadow(struct kvm *kvm);
327 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
330 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
331 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
332 void kvm_release_page_clean(struct page *page);
333 void kvm_release_page_dirty(struct page *page);
334 void kvm_set_page_dirty(struct page *page);
335 void kvm_set_page_accessed(struct page *page);
337 pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr);
338 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
339 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
340 bool write_fault, bool *writable);
341 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
342 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
344 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
345 struct kvm_memory_slot *slot, gfn_t gfn);
346 int memslot_id(struct kvm *kvm, gfn_t gfn);
347 void kvm_release_pfn_dirty(pfn_t);
348 void kvm_release_pfn_clean(pfn_t pfn);
349 void kvm_set_pfn_dirty(pfn_t pfn);
350 void kvm_set_pfn_accessed(pfn_t pfn);
351 void kvm_get_pfn(pfn_t pfn);
353 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
355 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
357 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
358 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
359 int offset, int len);
360 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
362 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
363 void *data, unsigned long len);
364 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
366 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
367 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
368 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
369 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
370 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
371 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
372 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
375 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
376 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
377 void kvm_resched(struct kvm_vcpu *vcpu);
378 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
379 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
380 void kvm_flush_remote_tlbs(struct kvm *kvm);
381 void kvm_reload_remote_mmus(struct kvm *kvm);
383 long kvm_arch_dev_ioctl(struct file *filp,
384 unsigned int ioctl, unsigned long arg);
385 long kvm_arch_vcpu_ioctl(struct file *filp,
386 unsigned int ioctl, unsigned long arg);
388 int kvm_dev_ioctl_check_extension(long ext);
390 int kvm_get_dirty_log(struct kvm *kvm,
391 struct kvm_dirty_log *log, int *is_dirty);
392 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
393 struct kvm_dirty_log *log);
395 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
397 kvm_userspace_memory_region *mem,
399 long kvm_arch_vm_ioctl(struct file *filp,
400 unsigned int ioctl, unsigned long arg);
402 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
403 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
405 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
406 struct kvm_translation *tr);
408 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
409 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
410 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
411 struct kvm_sregs *sregs);
412 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
413 struct kvm_sregs *sregs);
414 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
415 struct kvm_mp_state *mp_state);
416 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
417 struct kvm_mp_state *mp_state);
418 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
419 struct kvm_guest_debug *dbg);
420 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
422 int kvm_arch_init(void *opaque);
423 void kvm_arch_exit(void);
425 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
426 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
428 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
429 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
430 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
431 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
432 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
433 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
435 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
436 int kvm_arch_hardware_enable(void *garbage);
437 void kvm_arch_hardware_disable(void *garbage);
438 int kvm_arch_hardware_setup(void);
439 void kvm_arch_hardware_unsetup(void);
440 void kvm_arch_check_processor_compat(void *rtn);
441 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
443 void kvm_free_physmem(struct kvm *kvm);
445 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
446 static inline struct kvm *kvm_arch_alloc_vm(void)
448 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
451 static inline void kvm_arch_free_vm(struct kvm *kvm)
457 int kvm_arch_init_vm(struct kvm *kvm);
458 void kvm_arch_destroy_vm(struct kvm *kvm);
459 void kvm_free_all_assigned_devices(struct kvm *kvm);
460 void kvm_arch_sync_events(struct kvm *kvm);
462 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
463 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
465 int kvm_is_mmio_pfn(pfn_t pfn);
467 struct kvm_irq_ack_notifier {
468 struct hlist_node link;
470 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
473 struct kvm_assigned_dev_kernel {
474 struct kvm_irq_ack_notifier ack_notifier;
475 struct list_head list;
480 unsigned int entries_nr;
482 bool host_irq_disabled;
483 struct msix_entry *host_msix_entries;
485 struct msix_entry *guest_msix_entries;
486 unsigned long irq_requested_type;
491 spinlock_t intx_lock;
495 struct kvm_irq_mask_notifier {
496 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
498 struct hlist_node link;
501 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
502 struct kvm_irq_mask_notifier *kimn);
503 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
504 struct kvm_irq_mask_notifier *kimn);
505 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
508 #ifdef __KVM_HAVE_IOAPIC
509 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
510 union kvm_ioapic_redirect_entry *entry,
511 unsigned long *deliver_bitmask);
513 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
514 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
515 void kvm_register_irq_ack_notifier(struct kvm *kvm,
516 struct kvm_irq_ack_notifier *kian);
517 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
518 struct kvm_irq_ack_notifier *kian);
519 int kvm_request_irq_source_id(struct kvm *kvm);
520 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
522 /* For vcpu->arch.iommu_flags */
523 #define KVM_IOMMU_CACHE_COHERENCY 0x1
525 #ifdef CONFIG_IOMMU_API
526 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
527 int kvm_iommu_map_guest(struct kvm *kvm);
528 int kvm_iommu_unmap_guest(struct kvm *kvm);
529 int kvm_assign_device(struct kvm *kvm,
530 struct kvm_assigned_dev_kernel *assigned_dev);
531 int kvm_deassign_device(struct kvm *kvm,
532 struct kvm_assigned_dev_kernel *assigned_dev);
533 #else /* CONFIG_IOMMU_API */
534 static inline int kvm_iommu_map_pages(struct kvm *kvm,
535 struct kvm_memory_slot *slot)
540 static inline int kvm_iommu_map_guest(struct kvm *kvm)
545 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
550 static inline int kvm_assign_device(struct kvm *kvm,
551 struct kvm_assigned_dev_kernel *assigned_dev)
556 static inline int kvm_deassign_device(struct kvm *kvm,
557 struct kvm_assigned_dev_kernel *assigned_dev)
561 #endif /* CONFIG_IOMMU_API */
563 static inline void kvm_guest_enter(void)
565 account_system_vtime(current);
566 current->flags |= PF_VCPU;
569 static inline void kvm_guest_exit(void)
571 account_system_vtime(current);
572 current->flags &= ~PF_VCPU;
575 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
578 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
581 static inline gpa_t gfn_to_gpa(gfn_t gfn)
583 return (gpa_t)gfn << PAGE_SHIFT;
586 static inline gfn_t gpa_to_gfn(gpa_t gpa)
588 return (gfn_t)(gpa >> PAGE_SHIFT);
591 static inline hpa_t pfn_to_hpa(pfn_t pfn)
593 return (hpa_t)pfn << PAGE_SHIFT;
596 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
598 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
606 struct kvm_stats_debugfs_item {
609 enum kvm_stat_kind kind;
610 struct dentry *dentry;
612 extern struct kvm_stats_debugfs_item debugfs_entries[];
613 extern struct dentry *kvm_debugfs_dir;
615 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
616 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
618 if (unlikely(vcpu->kvm->mmu_notifier_count))
621 * Both reads happen under the mmu_lock and both values are
622 * modified under mmu_lock, so there's no need of smb_rmb()
623 * here in between, otherwise mmu_notifier_count should be
624 * read before mmu_notifier_seq, see
625 * mmu_notifier_invalidate_range_end write side.
627 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
633 #ifdef CONFIG_HAVE_KVM_IRQCHIP
635 #define KVM_MAX_IRQ_ROUTES 1024
637 int kvm_setup_default_irq_routing(struct kvm *kvm);
638 int kvm_set_irq_routing(struct kvm *kvm,
639 const struct kvm_irq_routing_entry *entries,
642 void kvm_free_irq_routing(struct kvm *kvm);
646 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
650 #ifdef CONFIG_HAVE_KVM_EVENTFD
652 void kvm_eventfd_init(struct kvm *kvm);
653 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
654 void kvm_irqfd_release(struct kvm *kvm);
655 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
659 static inline void kvm_eventfd_init(struct kvm *kvm) {}
660 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
665 static inline void kvm_irqfd_release(struct kvm *kvm) {}
666 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
671 #endif /* CONFIG_HAVE_KVM_EVENTFD */
673 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
674 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
676 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
680 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
682 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
687 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
695 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
697 set_bit(req, &vcpu->requests);
700 static inline bool kvm_make_check_request(int req, struct kvm_vcpu *vcpu)
702 return test_and_set_bit(req, &vcpu->requests);
705 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
707 if (test_bit(req, &vcpu->requests)) {
708 clear_bit(req, &vcpu->requests);