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>
16 #include <linux/bug.h>
18 #include <linux/mmu_notifier.h>
19 #include <linux/preempt.h>
20 #include <linux/msi.h>
21 #include <linux/slab.h>
22 #include <linux/rcupdate.h>
23 #include <linux/ratelimit.h>
24 #include <asm/signal.h>
26 #include <linux/kvm.h>
27 #include <linux/kvm_para.h>
29 #include <linux/kvm_types.h>
31 #include <asm/kvm_host.h>
34 #define KVM_MMIO_SIZE 8
38 * If we support unaligned MMIO, at most one fragment will be split into two:
40 #ifdef KVM_UNALIGNED_MMIO
41 # define KVM_EXTRA_MMIO_FRAGMENTS 1
43 # define KVM_EXTRA_MMIO_FRAGMENTS 0
46 #define KVM_USER_MMIO_SIZE 8
48 #define KVM_MAX_MMIO_FRAGMENTS \
49 (KVM_MMIO_SIZE / KVM_USER_MMIO_SIZE + KVM_EXTRA_MMIO_FRAGMENTS)
52 * vcpu->requests bit members
54 #define KVM_REQ_TLB_FLUSH 0
55 #define KVM_REQ_MIGRATE_TIMER 1
56 #define KVM_REQ_REPORT_TPR_ACCESS 2
57 #define KVM_REQ_MMU_RELOAD 3
58 #define KVM_REQ_TRIPLE_FAULT 4
59 #define KVM_REQ_PENDING_TIMER 5
60 #define KVM_REQ_UNHALT 6
61 #define KVM_REQ_MMU_SYNC 7
62 #define KVM_REQ_CLOCK_UPDATE 8
63 #define KVM_REQ_KICK 9
64 #define KVM_REQ_DEACTIVATE_FPU 10
65 #define KVM_REQ_EVENT 11
66 #define KVM_REQ_APF_HALT 12
67 #define KVM_REQ_STEAL_UPDATE 13
68 #define KVM_REQ_NMI 14
69 #define KVM_REQ_IMMEDIATE_EXIT 15
70 #define KVM_REQ_PMU 16
71 #define KVM_REQ_PMI 17
73 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
77 extern struct kmem_cache *kvm_vcpu_cache;
82 struct kvm_io_device *dev;
85 #define NR_IOBUS_DEVS 1000
89 struct kvm_io_range range[];
98 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
99 int len, const void *val);
100 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
102 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
103 int len, struct kvm_io_device *dev);
104 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
105 struct kvm_io_device *dev);
107 #ifdef CONFIG_KVM_ASYNC_PF
108 struct kvm_async_pf {
109 struct work_struct work;
110 struct list_head link;
111 struct list_head queue;
112 struct kvm_vcpu *vcpu;
113 struct mm_struct *mm;
116 struct kvm_arch_async_pf arch;
121 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
122 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
123 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
124 struct kvm_arch_async_pf *arch);
125 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
132 READING_SHADOW_PAGE_TABLES,
136 * Sometimes a large or cross-page mmio needs to be broken up into separate
137 * exits for userspace servicing.
139 struct kvm_mmio_fragment {
147 #ifdef CONFIG_PREEMPT_NOTIFIERS
148 struct preempt_notifier preempt_notifier;
154 unsigned long requests;
155 unsigned long guest_debug;
161 int guest_fpu_loaded, guest_xcr0_loaded;
162 wait_queue_head_t wq;
166 struct kvm_vcpu_stat stat;
168 #ifdef CONFIG_HAS_IOMEM
170 int mmio_read_completed;
172 int mmio_cur_fragment;
173 int mmio_nr_fragments;
174 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
177 #ifdef CONFIG_KVM_ASYNC_PF
180 struct list_head queue;
181 struct list_head done;
186 struct kvm_vcpu_arch arch;
189 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
191 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
195 * Some of the bitops functions do not support too long bitmaps.
196 * This number must be determined not to exceed such limits.
198 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
200 struct kvm_memory_slot {
202 unsigned long npages;
205 unsigned long *dirty_bitmap;
206 struct kvm_arch_memory_slot arch;
207 unsigned long userspace_addr;
212 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
214 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
217 struct kvm_kernel_irq_routing_entry {
220 int (*set)(struct kvm_kernel_irq_routing_entry *e,
221 struct kvm *kvm, int irq_source_id, int level);
229 struct hlist_node link;
232 #ifdef __KVM_HAVE_IOAPIC
234 struct kvm_irq_routing_table {
235 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
236 struct kvm_kernel_irq_routing_entry *rt_entries;
239 * Array indexed by gsi. Each entry contains list of irq chips
240 * the gsi is connected to.
242 struct hlist_head map[0];
247 struct kvm_irq_routing_table {};
251 #ifndef KVM_MEM_SLOTS_NUM
252 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
257 * memslots are not sorted by id anymore, please use id_to_memslot()
258 * to get the memslot by its id.
260 struct kvm_memslots {
262 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
263 /* The mapping table from slot id to the index in memslots[]. */
264 int id_to_index[KVM_MEM_SLOTS_NUM];
269 struct mutex slots_lock;
270 struct mm_struct *mm; /* userspace tied to this vm */
271 struct kvm_memslots *memslots;
272 struct srcu_struct srcu;
273 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
276 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
277 atomic_t online_vcpus;
278 int last_boosted_vcpu;
279 struct list_head vm_list;
281 struct kvm_io_bus *buses[KVM_NR_BUSES];
282 #ifdef CONFIG_HAVE_KVM_EVENTFD
285 struct list_head items;
287 struct list_head ioeventfds;
289 struct kvm_vm_stat stat;
290 struct kvm_arch arch;
291 atomic_t users_count;
292 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
293 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
294 spinlock_t ring_lock;
295 struct list_head coalesced_zones;
298 struct mutex irq_lock;
299 #ifdef CONFIG_HAVE_KVM_IRQCHIP
301 * Update side is protected by irq_lock and,
302 * if configured, irqfds.lock.
304 struct kvm_irq_routing_table __rcu *irq_routing;
305 struct hlist_head mask_notifier_list;
306 struct hlist_head irq_ack_notifier_list;
309 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
310 struct mmu_notifier mmu_notifier;
311 unsigned long mmu_notifier_seq;
312 long mmu_notifier_count;
317 #define kvm_err(fmt, ...) \
318 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
319 #define kvm_info(fmt, ...) \
320 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
321 #define kvm_debug(fmt, ...) \
322 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
323 #define kvm_pr_unimpl(fmt, ...) \
324 pr_err_ratelimited("kvm [%i]: " fmt, \
325 task_tgid_nr(current), ## __VA_ARGS__)
327 /* The guest did something we don't support. */
328 #define vcpu_unimpl(vcpu, fmt, ...) \
329 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
331 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
334 return kvm->vcpus[i];
337 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
339 idx < atomic_read(&kvm->online_vcpus) && \
340 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
343 #define kvm_for_each_memslot(memslot, slots) \
344 for (memslot = &slots->memslots[0]; \
345 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
348 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
349 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
351 void vcpu_load(struct kvm_vcpu *vcpu);
352 void vcpu_put(struct kvm_vcpu *vcpu);
354 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
355 struct module *module);
358 void kvm_get_kvm(struct kvm *kvm);
359 void kvm_put_kvm(struct kvm *kvm);
360 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
362 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
364 return rcu_dereference_check(kvm->memslots,
365 srcu_read_lock_held(&kvm->srcu)
366 || lockdep_is_held(&kvm->slots_lock));
369 static inline struct kvm_memory_slot *
370 id_to_memslot(struct kvm_memslots *slots, int id)
372 int index = slots->id_to_index[id];
373 struct kvm_memory_slot *slot;
375 slot = &slots->memslots[index];
377 WARN_ON(slot->id != id);
381 extern struct page *bad_page;
383 int is_error_page(struct page *page);
384 int is_error_pfn(pfn_t pfn);
385 int is_hwpoison_pfn(pfn_t pfn);
386 int is_noslot_pfn(pfn_t pfn);
387 int is_invalid_pfn(pfn_t pfn);
388 int kvm_is_error_hva(unsigned long addr);
389 int kvm_set_memory_region(struct kvm *kvm,
390 struct kvm_userspace_memory_region *mem,
392 int __kvm_set_memory_region(struct kvm *kvm,
393 struct kvm_userspace_memory_region *mem,
395 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
396 struct kvm_memory_slot *dont);
397 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
398 int kvm_arch_prepare_memory_region(struct kvm *kvm,
399 struct kvm_memory_slot *memslot,
400 struct kvm_memory_slot old,
401 struct kvm_userspace_memory_region *mem,
403 void kvm_arch_commit_memory_region(struct kvm *kvm,
404 struct kvm_userspace_memory_region *mem,
405 struct kvm_memory_slot old,
407 bool kvm_largepages_enabled(void);
408 void kvm_disable_largepages(void);
409 void kvm_arch_flush_shadow(struct kvm *kvm);
411 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
414 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
415 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
416 void kvm_release_page_clean(struct page *page);
417 void kvm_release_page_dirty(struct page *page);
418 void kvm_set_page_dirty(struct page *page);
419 void kvm_set_page_accessed(struct page *page);
421 pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr);
422 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
423 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
424 bool write_fault, bool *writable);
425 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
426 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
428 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
429 struct kvm_memory_slot *slot, gfn_t gfn);
430 void kvm_release_pfn_dirty(pfn_t);
431 void kvm_release_pfn_clean(pfn_t pfn);
432 void kvm_set_pfn_dirty(pfn_t pfn);
433 void kvm_set_pfn_accessed(pfn_t pfn);
434 void kvm_get_pfn(pfn_t pfn);
435 pfn_t get_fault_pfn(void);
437 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
439 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
441 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
442 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
443 void *data, unsigned long len);
444 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
445 int offset, int len);
446 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
448 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
449 void *data, unsigned long len);
450 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
452 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
453 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
454 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
455 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
456 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
457 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
458 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
461 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
462 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
463 bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
464 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
465 void kvm_resched(struct kvm_vcpu *vcpu);
466 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
467 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
469 void kvm_flush_remote_tlbs(struct kvm *kvm);
470 void kvm_reload_remote_mmus(struct kvm *kvm);
472 long kvm_arch_dev_ioctl(struct file *filp,
473 unsigned int ioctl, unsigned long arg);
474 long kvm_arch_vcpu_ioctl(struct file *filp,
475 unsigned int ioctl, unsigned long arg);
476 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
478 int kvm_dev_ioctl_check_extension(long ext);
480 int kvm_get_dirty_log(struct kvm *kvm,
481 struct kvm_dirty_log *log, int *is_dirty);
482 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
483 struct kvm_dirty_log *log);
485 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
487 kvm_userspace_memory_region *mem,
489 long kvm_arch_vm_ioctl(struct file *filp,
490 unsigned int ioctl, unsigned long arg);
492 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
493 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
495 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
496 struct kvm_translation *tr);
498 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
499 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
500 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
501 struct kvm_sregs *sregs);
502 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
503 struct kvm_sregs *sregs);
504 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
505 struct kvm_mp_state *mp_state);
506 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
507 struct kvm_mp_state *mp_state);
508 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
509 struct kvm_guest_debug *dbg);
510 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
512 int kvm_arch_init(void *opaque);
513 void kvm_arch_exit(void);
515 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
516 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
518 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
519 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
520 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
521 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
522 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
523 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
525 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
526 int kvm_arch_hardware_enable(void *garbage);
527 void kvm_arch_hardware_disable(void *garbage);
528 int kvm_arch_hardware_setup(void);
529 void kvm_arch_hardware_unsetup(void);
530 void kvm_arch_check_processor_compat(void *rtn);
531 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
532 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
534 void kvm_free_physmem(struct kvm *kvm);
536 void *kvm_kvzalloc(unsigned long size);
537 void kvm_kvfree(const void *addr);
539 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
540 static inline struct kvm *kvm_arch_alloc_vm(void)
542 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
545 static inline void kvm_arch_free_vm(struct kvm *kvm)
551 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
553 #ifdef __KVM_HAVE_ARCH_WQP
554 return vcpu->arch.wqp;
560 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
561 void kvm_arch_destroy_vm(struct kvm *kvm);
562 void kvm_free_all_assigned_devices(struct kvm *kvm);
563 void kvm_arch_sync_events(struct kvm *kvm);
565 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
566 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
568 int kvm_is_mmio_pfn(pfn_t pfn);
570 struct kvm_irq_ack_notifier {
571 struct hlist_node link;
573 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
576 struct kvm_assigned_dev_kernel {
577 struct kvm_irq_ack_notifier ack_notifier;
578 struct list_head list;
583 unsigned int entries_nr;
585 bool host_irq_disabled;
587 struct msix_entry *host_msix_entries;
589 struct msix_entry *guest_msix_entries;
590 unsigned long irq_requested_type;
595 spinlock_t intx_lock;
596 spinlock_t intx_mask_lock;
598 struct pci_saved_state *pci_saved_state;
601 struct kvm_irq_mask_notifier {
602 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
604 struct hlist_node link;
607 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
608 struct kvm_irq_mask_notifier *kimn);
609 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
610 struct kvm_irq_mask_notifier *kimn);
611 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
614 #ifdef __KVM_HAVE_IOAPIC
615 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
616 union kvm_ioapic_redirect_entry *entry,
617 unsigned long *deliver_bitmask);
619 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
620 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
621 int irq_source_id, int level);
622 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
623 void kvm_register_irq_ack_notifier(struct kvm *kvm,
624 struct kvm_irq_ack_notifier *kian);
625 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
626 struct kvm_irq_ack_notifier *kian);
627 int kvm_request_irq_source_id(struct kvm *kvm);
628 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
630 /* For vcpu->arch.iommu_flags */
631 #define KVM_IOMMU_CACHE_COHERENCY 0x1
633 #ifdef CONFIG_IOMMU_API
634 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
635 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
636 int kvm_iommu_map_guest(struct kvm *kvm);
637 int kvm_iommu_unmap_guest(struct kvm *kvm);
638 int kvm_assign_device(struct kvm *kvm,
639 struct kvm_assigned_dev_kernel *assigned_dev);
640 int kvm_deassign_device(struct kvm *kvm,
641 struct kvm_assigned_dev_kernel *assigned_dev);
642 #else /* CONFIG_IOMMU_API */
643 static inline int kvm_iommu_map_pages(struct kvm *kvm,
644 struct kvm_memory_slot *slot)
649 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
650 struct kvm_memory_slot *slot)
654 static inline int kvm_iommu_map_guest(struct kvm *kvm)
659 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
664 static inline int kvm_assign_device(struct kvm *kvm,
665 struct kvm_assigned_dev_kernel *assigned_dev)
670 static inline int kvm_deassign_device(struct kvm *kvm,
671 struct kvm_assigned_dev_kernel *assigned_dev)
675 #endif /* CONFIG_IOMMU_API */
677 static inline void kvm_guest_enter(void)
679 BUG_ON(preemptible());
680 account_system_vtime(current);
681 current->flags |= PF_VCPU;
682 /* KVM does not hold any references to rcu protected data when it
683 * switches CPU into a guest mode. In fact switching to a guest mode
684 * is very similar to exiting to userspase from rcu point of view. In
685 * addition CPU may stay in a guest mode for quite a long time (up to
686 * one time slice). Lets treat guest mode as quiescent state, just like
687 * we do with user-mode execution.
689 rcu_virt_note_context_switch(smp_processor_id());
692 static inline void kvm_guest_exit(void)
694 account_system_vtime(current);
695 current->flags &= ~PF_VCPU;
699 * search_memslots() and __gfn_to_memslot() are here because they are
700 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
701 * gfn_to_memslot() itself isn't here as an inline because that would
702 * bloat other code too much.
704 static inline struct kvm_memory_slot *
705 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
707 struct kvm_memory_slot *memslot;
709 kvm_for_each_memslot(memslot, slots)
710 if (gfn >= memslot->base_gfn &&
711 gfn < memslot->base_gfn + memslot->npages)
717 static inline struct kvm_memory_slot *
718 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
720 return search_memslots(slots, gfn);
723 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
725 return gfn_to_memslot(kvm, gfn)->id;
728 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
730 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
731 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
732 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
736 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
738 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
740 return slot->base_gfn + gfn_offset;
743 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
746 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
749 static inline gpa_t gfn_to_gpa(gfn_t gfn)
751 return (gpa_t)gfn << PAGE_SHIFT;
754 static inline gfn_t gpa_to_gfn(gpa_t gpa)
756 return (gfn_t)(gpa >> PAGE_SHIFT);
759 static inline hpa_t pfn_to_hpa(pfn_t pfn)
761 return (hpa_t)pfn << PAGE_SHIFT;
764 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
766 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
774 struct kvm_stats_debugfs_item {
777 enum kvm_stat_kind kind;
778 struct dentry *dentry;
780 extern struct kvm_stats_debugfs_item debugfs_entries[];
781 extern struct dentry *kvm_debugfs_dir;
783 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
784 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
786 if (unlikely(vcpu->kvm->mmu_notifier_count))
789 * Ensure the read of mmu_notifier_count happens before the read
790 * of mmu_notifier_seq. This interacts with the smp_wmb() in
791 * mmu_notifier_invalidate_range_end to make sure that the caller
792 * either sees the old (non-zero) value of mmu_notifier_count or
793 * the new (incremented) value of mmu_notifier_seq.
794 * PowerPC Book3s HV KVM calls this under a per-page lock
795 * rather than under kvm->mmu_lock, for scalability, so
796 * can't rely on kvm->mmu_lock to keep things ordered.
799 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
805 #ifdef KVM_CAP_IRQ_ROUTING
807 #define KVM_MAX_IRQ_ROUTES 1024
809 int kvm_setup_default_irq_routing(struct kvm *kvm);
810 int kvm_set_irq_routing(struct kvm *kvm,
811 const struct kvm_irq_routing_entry *entries,
814 void kvm_free_irq_routing(struct kvm *kvm);
816 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
820 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
824 #ifdef CONFIG_HAVE_KVM_EVENTFD
826 void kvm_eventfd_init(struct kvm *kvm);
827 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
828 void kvm_irqfd_release(struct kvm *kvm);
829 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
830 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
834 static inline void kvm_eventfd_init(struct kvm *kvm) {}
836 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
841 static inline void kvm_irqfd_release(struct kvm *kvm) {}
843 #ifdef CONFIG_HAVE_KVM_IRQCHIP
844 static inline void kvm_irq_routing_update(struct kvm *kvm,
845 struct kvm_irq_routing_table *irq_rt)
847 rcu_assign_pointer(kvm->irq_routing, irq_rt);
851 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
856 #endif /* CONFIG_HAVE_KVM_EVENTFD */
858 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
859 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
861 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
864 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
868 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
872 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
874 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
879 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
887 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
889 set_bit(req, &vcpu->requests);
892 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
894 if (test_bit(req, &vcpu->requests)) {
895 clear_bit(req, &vcpu->requests);