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 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
188 * Cpu relax intercept or pause loop exit optimization
189 * in_spin_loop: set when a vcpu does a pause loop exit
190 * or cpu relax intercepted.
191 * dy_eligible: indicates whether vcpu is eligible for directed yield.
198 struct kvm_vcpu_arch arch;
201 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
203 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
207 * Some of the bitops functions do not support too long bitmaps.
208 * This number must be determined not to exceed such limits.
210 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
212 struct kvm_memory_slot {
214 unsigned long npages;
217 unsigned long *dirty_bitmap;
218 struct kvm_arch_memory_slot arch;
219 unsigned long userspace_addr;
224 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
226 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
229 struct kvm_kernel_irq_routing_entry {
232 int (*set)(struct kvm_kernel_irq_routing_entry *e,
233 struct kvm *kvm, int irq_source_id, int level);
241 struct hlist_node link;
244 #ifdef __KVM_HAVE_IOAPIC
246 struct kvm_irq_routing_table {
247 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
248 struct kvm_kernel_irq_routing_entry *rt_entries;
251 * Array indexed by gsi. Each entry contains list of irq chips
252 * the gsi is connected to.
254 struct hlist_head map[0];
259 struct kvm_irq_routing_table {};
263 #ifndef KVM_MEM_SLOTS_NUM
264 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
269 * memslots are not sorted by id anymore, please use id_to_memslot()
270 * to get the memslot by its id.
272 struct kvm_memslots {
274 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
275 /* The mapping table from slot id to the index in memslots[]. */
276 int id_to_index[KVM_MEM_SLOTS_NUM];
281 struct mutex slots_lock;
282 struct mm_struct *mm; /* userspace tied to this vm */
283 struct kvm_memslots *memslots;
284 struct srcu_struct srcu;
285 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
288 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
289 atomic_t online_vcpus;
290 int last_boosted_vcpu;
291 struct list_head vm_list;
293 struct kvm_io_bus *buses[KVM_NR_BUSES];
294 #ifdef CONFIG_HAVE_KVM_EVENTFD
297 struct list_head items;
299 struct list_head ioeventfds;
301 struct kvm_vm_stat stat;
302 struct kvm_arch arch;
303 atomic_t users_count;
304 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
305 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
306 spinlock_t ring_lock;
307 struct list_head coalesced_zones;
310 struct mutex irq_lock;
311 #ifdef CONFIG_HAVE_KVM_IRQCHIP
313 * Update side is protected by irq_lock and,
314 * if configured, irqfds.lock.
316 struct kvm_irq_routing_table __rcu *irq_routing;
317 struct hlist_head mask_notifier_list;
318 struct hlist_head irq_ack_notifier_list;
321 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
322 struct mmu_notifier mmu_notifier;
323 unsigned long mmu_notifier_seq;
324 long mmu_notifier_count;
329 #define kvm_err(fmt, ...) \
330 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
331 #define kvm_info(fmt, ...) \
332 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
333 #define kvm_debug(fmt, ...) \
334 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
335 #define kvm_pr_unimpl(fmt, ...) \
336 pr_err_ratelimited("kvm [%i]: " fmt, \
337 task_tgid_nr(current), ## __VA_ARGS__)
339 /* The guest did something we don't support. */
340 #define vcpu_unimpl(vcpu, fmt, ...) \
341 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
343 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
346 return kvm->vcpus[i];
349 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
351 idx < atomic_read(&kvm->online_vcpus) && \
352 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
355 #define kvm_for_each_memslot(memslot, slots) \
356 for (memslot = &slots->memslots[0]; \
357 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
360 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
361 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
363 void vcpu_load(struct kvm_vcpu *vcpu);
364 void vcpu_put(struct kvm_vcpu *vcpu);
366 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
367 struct module *module);
370 void kvm_get_kvm(struct kvm *kvm);
371 void kvm_put_kvm(struct kvm *kvm);
372 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
374 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
376 return rcu_dereference_check(kvm->memslots,
377 srcu_read_lock_held(&kvm->srcu)
378 || lockdep_is_held(&kvm->slots_lock));
381 static inline struct kvm_memory_slot *
382 id_to_memslot(struct kvm_memslots *slots, int id)
384 int index = slots->id_to_index[id];
385 struct kvm_memory_slot *slot;
387 slot = &slots->memslots[index];
389 WARN_ON(slot->id != id);
393 extern struct page *bad_page;
395 int is_error_page(struct page *page);
396 int is_error_pfn(pfn_t pfn);
397 int is_hwpoison_pfn(pfn_t pfn);
398 int is_noslot_pfn(pfn_t pfn);
399 int is_invalid_pfn(pfn_t pfn);
400 int kvm_is_error_hva(unsigned long addr);
401 int kvm_set_memory_region(struct kvm *kvm,
402 struct kvm_userspace_memory_region *mem,
404 int __kvm_set_memory_region(struct kvm *kvm,
405 struct kvm_userspace_memory_region *mem,
407 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
408 struct kvm_memory_slot *dont);
409 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
410 int kvm_arch_prepare_memory_region(struct kvm *kvm,
411 struct kvm_memory_slot *memslot,
412 struct kvm_memory_slot old,
413 struct kvm_userspace_memory_region *mem,
415 void kvm_arch_commit_memory_region(struct kvm *kvm,
416 struct kvm_userspace_memory_region *mem,
417 struct kvm_memory_slot old,
419 bool kvm_largepages_enabled(void);
420 void kvm_disable_largepages(void);
421 void kvm_arch_flush_shadow(struct kvm *kvm);
423 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
426 struct page *get_bad_page(void);
427 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
428 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
429 void kvm_release_page_clean(struct page *page);
430 void kvm_release_page_dirty(struct page *page);
431 void kvm_set_page_dirty(struct page *page);
432 void kvm_set_page_accessed(struct page *page);
434 pfn_t hva_to_pfn_atomic(unsigned long addr);
435 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
436 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
437 bool write_fault, bool *writable);
438 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
439 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
441 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
442 void kvm_release_pfn_dirty(pfn_t);
443 void kvm_release_pfn_clean(pfn_t pfn);
444 void kvm_set_pfn_dirty(pfn_t pfn);
445 void kvm_set_pfn_accessed(pfn_t pfn);
446 void kvm_get_pfn(pfn_t pfn);
447 pfn_t get_fault_pfn(void);
449 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
451 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
453 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
454 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
455 void *data, unsigned long len);
456 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
457 int offset, int len);
458 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
460 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
461 void *data, unsigned long len);
462 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
464 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
465 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
466 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
467 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
468 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
469 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
470 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
473 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
474 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
475 bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
476 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
477 void kvm_resched(struct kvm_vcpu *vcpu);
478 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
479 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
481 void kvm_flush_remote_tlbs(struct kvm *kvm);
482 void kvm_reload_remote_mmus(struct kvm *kvm);
484 long kvm_arch_dev_ioctl(struct file *filp,
485 unsigned int ioctl, unsigned long arg);
486 long kvm_arch_vcpu_ioctl(struct file *filp,
487 unsigned int ioctl, unsigned long arg);
488 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
490 int kvm_dev_ioctl_check_extension(long ext);
492 int kvm_get_dirty_log(struct kvm *kvm,
493 struct kvm_dirty_log *log, int *is_dirty);
494 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
495 struct kvm_dirty_log *log);
497 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
499 kvm_userspace_memory_region *mem,
501 long kvm_arch_vm_ioctl(struct file *filp,
502 unsigned int ioctl, unsigned long arg);
504 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
505 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
507 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
508 struct kvm_translation *tr);
510 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
511 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
512 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
513 struct kvm_sregs *sregs);
514 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
515 struct kvm_sregs *sregs);
516 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
517 struct kvm_mp_state *mp_state);
518 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
519 struct kvm_mp_state *mp_state);
520 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
521 struct kvm_guest_debug *dbg);
522 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
524 int kvm_arch_init(void *opaque);
525 void kvm_arch_exit(void);
527 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
528 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
530 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
531 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
532 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
533 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
534 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
535 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
537 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
538 int kvm_arch_hardware_enable(void *garbage);
539 void kvm_arch_hardware_disable(void *garbage);
540 int kvm_arch_hardware_setup(void);
541 void kvm_arch_hardware_unsetup(void);
542 void kvm_arch_check_processor_compat(void *rtn);
543 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
544 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
546 void kvm_free_physmem(struct kvm *kvm);
548 void *kvm_kvzalloc(unsigned long size);
549 void kvm_kvfree(const void *addr);
551 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
552 static inline struct kvm *kvm_arch_alloc_vm(void)
554 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
557 static inline void kvm_arch_free_vm(struct kvm *kvm)
563 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
565 #ifdef __KVM_HAVE_ARCH_WQP
566 return vcpu->arch.wqp;
572 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
573 void kvm_arch_destroy_vm(struct kvm *kvm);
574 void kvm_free_all_assigned_devices(struct kvm *kvm);
575 void kvm_arch_sync_events(struct kvm *kvm);
577 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
578 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
580 bool kvm_is_mmio_pfn(pfn_t pfn);
582 struct kvm_irq_ack_notifier {
583 struct hlist_node link;
585 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
588 struct kvm_assigned_dev_kernel {
589 struct kvm_irq_ack_notifier ack_notifier;
590 struct list_head list;
595 unsigned int entries_nr;
597 bool host_irq_disabled;
599 struct msix_entry *host_msix_entries;
601 struct msix_entry *guest_msix_entries;
602 unsigned long irq_requested_type;
607 spinlock_t intx_lock;
608 spinlock_t intx_mask_lock;
610 struct pci_saved_state *pci_saved_state;
613 struct kvm_irq_mask_notifier {
614 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
616 struct hlist_node link;
619 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
620 struct kvm_irq_mask_notifier *kimn);
621 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
622 struct kvm_irq_mask_notifier *kimn);
623 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
626 #ifdef __KVM_HAVE_IOAPIC
627 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
628 union kvm_ioapic_redirect_entry *entry,
629 unsigned long *deliver_bitmask);
631 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
632 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
633 int irq_source_id, int level);
634 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
635 void kvm_register_irq_ack_notifier(struct kvm *kvm,
636 struct kvm_irq_ack_notifier *kian);
637 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
638 struct kvm_irq_ack_notifier *kian);
639 int kvm_request_irq_source_id(struct kvm *kvm);
640 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
642 /* For vcpu->arch.iommu_flags */
643 #define KVM_IOMMU_CACHE_COHERENCY 0x1
645 #ifdef CONFIG_IOMMU_API
646 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
647 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
648 int kvm_iommu_map_guest(struct kvm *kvm);
649 int kvm_iommu_unmap_guest(struct kvm *kvm);
650 int kvm_assign_device(struct kvm *kvm,
651 struct kvm_assigned_dev_kernel *assigned_dev);
652 int kvm_deassign_device(struct kvm *kvm,
653 struct kvm_assigned_dev_kernel *assigned_dev);
654 #else /* CONFIG_IOMMU_API */
655 static inline int kvm_iommu_map_pages(struct kvm *kvm,
656 struct kvm_memory_slot *slot)
661 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
662 struct kvm_memory_slot *slot)
666 static inline int kvm_iommu_map_guest(struct kvm *kvm)
671 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
676 static inline int kvm_assign_device(struct kvm *kvm,
677 struct kvm_assigned_dev_kernel *assigned_dev)
682 static inline int kvm_deassign_device(struct kvm *kvm,
683 struct kvm_assigned_dev_kernel *assigned_dev)
687 #endif /* CONFIG_IOMMU_API */
689 static inline void kvm_guest_enter(void)
691 BUG_ON(preemptible());
692 account_system_vtime(current);
693 current->flags |= PF_VCPU;
694 /* KVM does not hold any references to rcu protected data when it
695 * switches CPU into a guest mode. In fact switching to a guest mode
696 * is very similar to exiting to userspase from rcu point of view. In
697 * addition CPU may stay in a guest mode for quite a long time (up to
698 * one time slice). Lets treat guest mode as quiescent state, just like
699 * we do with user-mode execution.
701 rcu_virt_note_context_switch(smp_processor_id());
704 static inline void kvm_guest_exit(void)
706 account_system_vtime(current);
707 current->flags &= ~PF_VCPU;
711 * search_memslots() and __gfn_to_memslot() are here because they are
712 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
713 * gfn_to_memslot() itself isn't here as an inline because that would
714 * bloat other code too much.
716 static inline struct kvm_memory_slot *
717 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
719 struct kvm_memory_slot *memslot;
721 kvm_for_each_memslot(memslot, slots)
722 if (gfn >= memslot->base_gfn &&
723 gfn < memslot->base_gfn + memslot->npages)
729 static inline struct kvm_memory_slot *
730 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
732 return search_memslots(slots, gfn);
735 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
737 return gfn_to_memslot(kvm, gfn)->id;
740 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
742 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
743 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
744 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
748 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
750 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
752 return slot->base_gfn + gfn_offset;
755 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
758 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
761 static inline gpa_t gfn_to_gpa(gfn_t gfn)
763 return (gpa_t)gfn << PAGE_SHIFT;
766 static inline gfn_t gpa_to_gfn(gpa_t gpa)
768 return (gfn_t)(gpa >> PAGE_SHIFT);
771 static inline hpa_t pfn_to_hpa(pfn_t pfn)
773 return (hpa_t)pfn << PAGE_SHIFT;
776 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
778 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
786 struct kvm_stats_debugfs_item {
789 enum kvm_stat_kind kind;
790 struct dentry *dentry;
792 extern struct kvm_stats_debugfs_item debugfs_entries[];
793 extern struct dentry *kvm_debugfs_dir;
795 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
796 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
798 if (unlikely(vcpu->kvm->mmu_notifier_count))
801 * Ensure the read of mmu_notifier_count happens before the read
802 * of mmu_notifier_seq. This interacts with the smp_wmb() in
803 * mmu_notifier_invalidate_range_end to make sure that the caller
804 * either sees the old (non-zero) value of mmu_notifier_count or
805 * the new (incremented) value of mmu_notifier_seq.
806 * PowerPC Book3s HV KVM calls this under a per-page lock
807 * rather than under kvm->mmu_lock, for scalability, so
808 * can't rely on kvm->mmu_lock to keep things ordered.
811 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
817 #ifdef KVM_CAP_IRQ_ROUTING
819 #define KVM_MAX_IRQ_ROUTES 1024
821 int kvm_setup_default_irq_routing(struct kvm *kvm);
822 int kvm_set_irq_routing(struct kvm *kvm,
823 const struct kvm_irq_routing_entry *entries,
826 void kvm_free_irq_routing(struct kvm *kvm);
828 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
832 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
836 #ifdef CONFIG_HAVE_KVM_EVENTFD
838 void kvm_eventfd_init(struct kvm *kvm);
839 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
840 void kvm_irqfd_release(struct kvm *kvm);
841 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
842 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
846 static inline void kvm_eventfd_init(struct kvm *kvm) {}
848 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
853 static inline void kvm_irqfd_release(struct kvm *kvm) {}
855 #ifdef CONFIG_HAVE_KVM_IRQCHIP
856 static inline void kvm_irq_routing_update(struct kvm *kvm,
857 struct kvm_irq_routing_table *irq_rt)
859 rcu_assign_pointer(kvm->irq_routing, irq_rt);
863 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
868 #endif /* CONFIG_HAVE_KVM_EVENTFD */
870 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
871 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
873 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
876 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
880 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
884 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
886 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
891 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
899 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
901 set_bit(req, &vcpu->requests);
904 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
906 if (test_bit(req, &vcpu->requests)) {
907 clear_bit(req, &vcpu->requests);
914 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
916 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
918 vcpu->spin_loop.in_spin_loop = val;
920 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
922 vcpu->spin_loop.dy_eligible = val;
925 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
927 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
931 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
935 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu)
940 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */