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 <linux/err.h>
25 #include <asm/signal.h>
27 #include <linux/kvm.h>
28 #include <linux/kvm_para.h>
30 #include <linux/kvm_types.h>
32 #include <asm/kvm_host.h>
35 #define KVM_MMIO_SIZE 8
39 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
40 * in kvm, other bits are visible for userspace which are defined in
41 * include/linux/kvm_h.
43 #define KVM_MEMSLOT_INVALID (1UL << 16)
46 * If we support unaligned MMIO, at most one fragment will be split into two:
48 #ifdef KVM_UNALIGNED_MMIO
49 # define KVM_EXTRA_MMIO_FRAGMENTS 1
51 # define KVM_EXTRA_MMIO_FRAGMENTS 0
54 #define KVM_USER_MMIO_SIZE 8
56 #define KVM_MAX_MMIO_FRAGMENTS \
57 (KVM_MMIO_SIZE / KVM_USER_MMIO_SIZE + KVM_EXTRA_MMIO_FRAGMENTS)
60 * For the normal pfn, the highest 12 bits should be zero,
61 * so we can mask these bits to indicate the error.
63 #define KVM_PFN_ERR_MASK (0xfffULL << 52)
65 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
66 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
67 #define KVM_PFN_ERR_BAD (KVM_PFN_ERR_MASK + 2)
68 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 3)
70 static inline bool is_error_pfn(pfn_t pfn)
72 return !!(pfn & KVM_PFN_ERR_MASK);
75 static inline bool is_noslot_pfn(pfn_t pfn)
77 return pfn == KVM_PFN_ERR_BAD;
80 static inline bool is_invalid_pfn(pfn_t pfn)
82 return !is_noslot_pfn(pfn) && is_error_pfn(pfn);
85 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
86 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
88 static inline bool kvm_is_error_hva(unsigned long addr)
90 return addr >= PAGE_OFFSET;
93 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
95 static inline bool is_error_page(struct page *page)
101 * vcpu->requests bit members
103 #define KVM_REQ_TLB_FLUSH 0
104 #define KVM_REQ_MIGRATE_TIMER 1
105 #define KVM_REQ_REPORT_TPR_ACCESS 2
106 #define KVM_REQ_MMU_RELOAD 3
107 #define KVM_REQ_TRIPLE_FAULT 4
108 #define KVM_REQ_PENDING_TIMER 5
109 #define KVM_REQ_UNHALT 6
110 #define KVM_REQ_MMU_SYNC 7
111 #define KVM_REQ_CLOCK_UPDATE 8
112 #define KVM_REQ_KICK 9
113 #define KVM_REQ_DEACTIVATE_FPU 10
114 #define KVM_REQ_EVENT 11
115 #define KVM_REQ_APF_HALT 12
116 #define KVM_REQ_STEAL_UPDATE 13
117 #define KVM_REQ_NMI 14
118 #define KVM_REQ_IMMEDIATE_EXIT 15
119 #define KVM_REQ_PMU 16
120 #define KVM_REQ_PMI 17
122 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
123 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
127 extern struct kmem_cache *kvm_vcpu_cache;
129 struct kvm_io_range {
132 struct kvm_io_device *dev;
135 #define NR_IOBUS_DEVS 1000
139 struct kvm_io_range range[];
148 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
149 int len, const void *val);
150 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
152 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
153 int len, struct kvm_io_device *dev);
154 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
155 struct kvm_io_device *dev);
157 #ifdef CONFIG_KVM_ASYNC_PF
158 struct kvm_async_pf {
159 struct work_struct work;
160 struct list_head link;
161 struct list_head queue;
162 struct kvm_vcpu *vcpu;
163 struct mm_struct *mm;
166 struct kvm_arch_async_pf arch;
171 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
172 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
173 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
174 struct kvm_arch_async_pf *arch);
175 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
182 READING_SHADOW_PAGE_TABLES,
186 * Sometimes a large or cross-page mmio needs to be broken up into separate
187 * exits for userspace servicing.
189 struct kvm_mmio_fragment {
197 #ifdef CONFIG_PREEMPT_NOTIFIERS
198 struct preempt_notifier preempt_notifier;
204 unsigned long requests;
205 unsigned long guest_debug;
211 int guest_fpu_loaded, guest_xcr0_loaded;
212 wait_queue_head_t wq;
216 struct kvm_vcpu_stat stat;
218 #ifdef CONFIG_HAS_IOMEM
220 int mmio_read_completed;
222 int mmio_cur_fragment;
223 int mmio_nr_fragments;
224 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
227 #ifdef CONFIG_KVM_ASYNC_PF
230 struct list_head queue;
231 struct list_head done;
236 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
238 * Cpu relax intercept or pause loop exit optimization
239 * in_spin_loop: set when a vcpu does a pause loop exit
240 * or cpu relax intercepted.
241 * dy_eligible: indicates whether vcpu is eligible for directed yield.
248 struct kvm_vcpu_arch arch;
251 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
253 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
257 * Some of the bitops functions do not support too long bitmaps.
258 * This number must be determined not to exceed such limits.
260 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
262 struct kvm_memory_slot {
264 unsigned long npages;
266 unsigned long *dirty_bitmap;
267 struct kvm_arch_memory_slot arch;
268 unsigned long userspace_addr;
273 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
275 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
278 struct kvm_kernel_irq_routing_entry {
281 int (*set)(struct kvm_kernel_irq_routing_entry *e,
282 struct kvm *kvm, int irq_source_id, int level);
290 struct hlist_node link;
293 #ifdef __KVM_HAVE_IOAPIC
295 struct kvm_irq_routing_table {
296 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
297 struct kvm_kernel_irq_routing_entry *rt_entries;
300 * Array indexed by gsi. Each entry contains list of irq chips
301 * the gsi is connected to.
303 struct hlist_head map[0];
308 struct kvm_irq_routing_table {};
312 #ifndef KVM_MEM_SLOTS_NUM
313 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
318 * memslots are not sorted by id anymore, please use id_to_memslot()
319 * to get the memslot by its id.
321 struct kvm_memslots {
323 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
324 /* The mapping table from slot id to the index in memslots[]. */
325 int id_to_index[KVM_MEM_SLOTS_NUM];
330 struct mutex slots_lock;
331 struct mm_struct *mm; /* userspace tied to this vm */
332 struct kvm_memslots *memslots;
333 struct srcu_struct srcu;
334 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
337 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
338 atomic_t online_vcpus;
339 int last_boosted_vcpu;
340 struct list_head vm_list;
342 struct kvm_io_bus *buses[KVM_NR_BUSES];
343 #ifdef CONFIG_HAVE_KVM_EVENTFD
346 struct list_head items;
347 struct list_head resampler_list;
348 struct mutex resampler_lock;
350 struct list_head ioeventfds;
352 struct kvm_vm_stat stat;
353 struct kvm_arch arch;
354 atomic_t users_count;
355 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
356 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
357 spinlock_t ring_lock;
358 struct list_head coalesced_zones;
361 struct mutex irq_lock;
362 #ifdef CONFIG_HAVE_KVM_IRQCHIP
364 * Update side is protected by irq_lock and,
365 * if configured, irqfds.lock.
367 struct kvm_irq_routing_table __rcu *irq_routing;
368 struct hlist_head mask_notifier_list;
369 struct hlist_head irq_ack_notifier_list;
372 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
373 struct mmu_notifier mmu_notifier;
374 unsigned long mmu_notifier_seq;
375 long mmu_notifier_count;
380 #define kvm_err(fmt, ...) \
381 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
382 #define kvm_info(fmt, ...) \
383 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
384 #define kvm_debug(fmt, ...) \
385 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
386 #define kvm_pr_unimpl(fmt, ...) \
387 pr_err_ratelimited("kvm [%i]: " fmt, \
388 task_tgid_nr(current), ## __VA_ARGS__)
390 /* The guest did something we don't support. */
391 #define vcpu_unimpl(vcpu, fmt, ...) \
392 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
394 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
397 return kvm->vcpus[i];
400 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
402 idx < atomic_read(&kvm->online_vcpus) && \
403 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
406 #define kvm_for_each_memslot(memslot, slots) \
407 for (memslot = &slots->memslots[0]; \
408 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
411 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
412 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
414 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
415 void vcpu_put(struct kvm_vcpu *vcpu);
417 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
418 struct module *module);
421 void kvm_get_kvm(struct kvm *kvm);
422 void kvm_put_kvm(struct kvm *kvm);
423 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
425 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
427 return rcu_dereference_check(kvm->memslots,
428 srcu_read_lock_held(&kvm->srcu)
429 || lockdep_is_held(&kvm->slots_lock));
432 static inline struct kvm_memory_slot *
433 id_to_memslot(struct kvm_memslots *slots, int id)
435 int index = slots->id_to_index[id];
436 struct kvm_memory_slot *slot;
438 slot = &slots->memslots[index];
440 WARN_ON(slot->id != id);
444 int kvm_set_memory_region(struct kvm *kvm,
445 struct kvm_userspace_memory_region *mem,
447 int __kvm_set_memory_region(struct kvm *kvm,
448 struct kvm_userspace_memory_region *mem,
450 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
451 struct kvm_memory_slot *dont);
452 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
453 int kvm_arch_prepare_memory_region(struct kvm *kvm,
454 struct kvm_memory_slot *memslot,
455 struct kvm_memory_slot old,
456 struct kvm_userspace_memory_region *mem,
458 void kvm_arch_commit_memory_region(struct kvm *kvm,
459 struct kvm_userspace_memory_region *mem,
460 struct kvm_memory_slot old,
462 bool kvm_largepages_enabled(void);
463 void kvm_disable_largepages(void);
464 /* flush all memory translations */
465 void kvm_arch_flush_shadow_all(struct kvm *kvm);
466 /* flush memory translations pointing to 'slot' */
467 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
468 struct kvm_memory_slot *slot);
470 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
473 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
474 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
475 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
476 void kvm_release_page_clean(struct page *page);
477 void kvm_release_page_dirty(struct page *page);
478 void kvm_set_page_dirty(struct page *page);
479 void kvm_set_page_accessed(struct page *page);
481 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
482 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
483 bool write_fault, bool *writable);
484 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
485 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
487 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
488 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
490 void kvm_release_pfn_dirty(pfn_t pfn);
491 void kvm_release_pfn_clean(pfn_t pfn);
492 void kvm_set_pfn_dirty(pfn_t pfn);
493 void kvm_set_pfn_accessed(pfn_t pfn);
494 void kvm_get_pfn(pfn_t pfn);
496 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
498 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
500 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
501 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
502 void *data, unsigned long len);
503 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
504 int offset, int len);
505 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
507 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
508 void *data, unsigned long len);
509 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
511 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
512 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
513 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
514 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
515 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
516 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
517 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
520 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
521 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
522 bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
523 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
524 void kvm_resched(struct kvm_vcpu *vcpu);
525 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
526 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
528 void kvm_flush_remote_tlbs(struct kvm *kvm);
529 void kvm_reload_remote_mmus(struct kvm *kvm);
531 long kvm_arch_dev_ioctl(struct file *filp,
532 unsigned int ioctl, unsigned long arg);
533 long kvm_arch_vcpu_ioctl(struct file *filp,
534 unsigned int ioctl, unsigned long arg);
535 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
537 int kvm_dev_ioctl_check_extension(long ext);
539 int kvm_get_dirty_log(struct kvm *kvm,
540 struct kvm_dirty_log *log, int *is_dirty);
541 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
542 struct kvm_dirty_log *log);
544 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
546 kvm_userspace_memory_region *mem,
548 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level);
549 long kvm_arch_vm_ioctl(struct file *filp,
550 unsigned int ioctl, unsigned long arg);
552 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
553 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
555 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
556 struct kvm_translation *tr);
558 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
559 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
560 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
561 struct kvm_sregs *sregs);
562 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
563 struct kvm_sregs *sregs);
564 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
565 struct kvm_mp_state *mp_state);
566 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
567 struct kvm_mp_state *mp_state);
568 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
569 struct kvm_guest_debug *dbg);
570 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
572 int kvm_arch_init(void *opaque);
573 void kvm_arch_exit(void);
575 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
576 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
578 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
579 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
580 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
581 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
582 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
583 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
585 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
586 int kvm_arch_hardware_enable(void *garbage);
587 void kvm_arch_hardware_disable(void *garbage);
588 int kvm_arch_hardware_setup(void);
589 void kvm_arch_hardware_unsetup(void);
590 void kvm_arch_check_processor_compat(void *rtn);
591 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
592 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
594 void kvm_free_physmem(struct kvm *kvm);
596 void *kvm_kvzalloc(unsigned long size);
597 void kvm_kvfree(const void *addr);
599 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
600 static inline struct kvm *kvm_arch_alloc_vm(void)
602 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
605 static inline void kvm_arch_free_vm(struct kvm *kvm)
611 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
613 #ifdef __KVM_HAVE_ARCH_WQP
614 return vcpu->arch.wqp;
620 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
621 void kvm_arch_destroy_vm(struct kvm *kvm);
622 void kvm_free_all_assigned_devices(struct kvm *kvm);
623 void kvm_arch_sync_events(struct kvm *kvm);
625 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
626 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
628 bool kvm_is_mmio_pfn(pfn_t pfn);
630 struct kvm_irq_ack_notifier {
631 struct hlist_node link;
633 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
636 struct kvm_assigned_dev_kernel {
637 struct kvm_irq_ack_notifier ack_notifier;
638 struct list_head list;
643 unsigned int entries_nr;
645 bool host_irq_disabled;
647 struct msix_entry *host_msix_entries;
649 struct msix_entry *guest_msix_entries;
650 unsigned long irq_requested_type;
655 spinlock_t intx_lock;
656 spinlock_t intx_mask_lock;
658 struct pci_saved_state *pci_saved_state;
661 struct kvm_irq_mask_notifier {
662 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
664 struct hlist_node link;
667 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
668 struct kvm_irq_mask_notifier *kimn);
669 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
670 struct kvm_irq_mask_notifier *kimn);
671 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
674 #ifdef __KVM_HAVE_IOAPIC
675 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
676 union kvm_ioapic_redirect_entry *entry,
677 unsigned long *deliver_bitmask);
679 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
680 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
681 int irq_source_id, int level);
682 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
683 void kvm_register_irq_ack_notifier(struct kvm *kvm,
684 struct kvm_irq_ack_notifier *kian);
685 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
686 struct kvm_irq_ack_notifier *kian);
687 int kvm_request_irq_source_id(struct kvm *kvm);
688 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
690 /* For vcpu->arch.iommu_flags */
691 #define KVM_IOMMU_CACHE_COHERENCY 0x1
693 #ifdef CONFIG_IOMMU_API
694 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
695 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
696 int kvm_iommu_map_guest(struct kvm *kvm);
697 int kvm_iommu_unmap_guest(struct kvm *kvm);
698 int kvm_assign_device(struct kvm *kvm,
699 struct kvm_assigned_dev_kernel *assigned_dev);
700 int kvm_deassign_device(struct kvm *kvm,
701 struct kvm_assigned_dev_kernel *assigned_dev);
702 #else /* CONFIG_IOMMU_API */
703 static inline int kvm_iommu_map_pages(struct kvm *kvm,
704 struct kvm_memory_slot *slot)
709 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
710 struct kvm_memory_slot *slot)
714 static inline int kvm_iommu_map_guest(struct kvm *kvm)
719 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
724 static inline int kvm_assign_device(struct kvm *kvm,
725 struct kvm_assigned_dev_kernel *assigned_dev)
730 static inline int kvm_deassign_device(struct kvm *kvm,
731 struct kvm_assigned_dev_kernel *assigned_dev)
735 #endif /* CONFIG_IOMMU_API */
737 static inline void kvm_guest_enter(void)
739 BUG_ON(preemptible());
741 * This is running in ioctl context so we can avoid
742 * the call to vtime_account() with its unnecessary idle check.
744 vtime_account_system_irqsafe(current);
745 current->flags |= PF_VCPU;
746 /* KVM does not hold any references to rcu protected data when it
747 * switches CPU into a guest mode. In fact switching to a guest mode
748 * is very similar to exiting to userspase from rcu point of view. In
749 * addition CPU may stay in a guest mode for quite a long time (up to
750 * one time slice). Lets treat guest mode as quiescent state, just like
751 * we do with user-mode execution.
753 rcu_virt_note_context_switch(smp_processor_id());
756 static inline void kvm_guest_exit(void)
759 * This is running in ioctl context so we can avoid
760 * the call to vtime_account() with its unnecessary idle check.
762 vtime_account_system_irqsafe(current);
763 current->flags &= ~PF_VCPU;
767 * search_memslots() and __gfn_to_memslot() are here because they are
768 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
769 * gfn_to_memslot() itself isn't here as an inline because that would
770 * bloat other code too much.
772 static inline struct kvm_memory_slot *
773 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
775 struct kvm_memory_slot *memslot;
777 kvm_for_each_memslot(memslot, slots)
778 if (gfn >= memslot->base_gfn &&
779 gfn < memslot->base_gfn + memslot->npages)
785 static inline struct kvm_memory_slot *
786 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
788 return search_memslots(slots, gfn);
791 static inline unsigned long
792 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
794 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
797 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
799 return gfn_to_memslot(kvm, gfn)->id;
802 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
804 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
805 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
806 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
810 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
812 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
814 return slot->base_gfn + gfn_offset;
817 static inline gpa_t gfn_to_gpa(gfn_t gfn)
819 return (gpa_t)gfn << PAGE_SHIFT;
822 static inline gfn_t gpa_to_gfn(gpa_t gpa)
824 return (gfn_t)(gpa >> PAGE_SHIFT);
827 static inline hpa_t pfn_to_hpa(pfn_t pfn)
829 return (hpa_t)pfn << PAGE_SHIFT;
832 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
834 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
842 struct kvm_stats_debugfs_item {
845 enum kvm_stat_kind kind;
846 struct dentry *dentry;
848 extern struct kvm_stats_debugfs_item debugfs_entries[];
849 extern struct dentry *kvm_debugfs_dir;
851 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
852 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
854 if (unlikely(vcpu->kvm->mmu_notifier_count))
857 * Ensure the read of mmu_notifier_count happens before the read
858 * of mmu_notifier_seq. This interacts with the smp_wmb() in
859 * mmu_notifier_invalidate_range_end to make sure that the caller
860 * either sees the old (non-zero) value of mmu_notifier_count or
861 * the new (incremented) value of mmu_notifier_seq.
862 * PowerPC Book3s HV KVM calls this under a per-page lock
863 * rather than under kvm->mmu_lock, for scalability, so
864 * can't rely on kvm->mmu_lock to keep things ordered.
867 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
873 #ifdef KVM_CAP_IRQ_ROUTING
875 #define KVM_MAX_IRQ_ROUTES 1024
877 int kvm_setup_default_irq_routing(struct kvm *kvm);
878 int kvm_set_irq_routing(struct kvm *kvm,
879 const struct kvm_irq_routing_entry *entries,
882 void kvm_free_irq_routing(struct kvm *kvm);
884 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
888 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
892 #ifdef CONFIG_HAVE_KVM_EVENTFD
894 void kvm_eventfd_init(struct kvm *kvm);
895 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
896 void kvm_irqfd_release(struct kvm *kvm);
897 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
898 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
902 static inline void kvm_eventfd_init(struct kvm *kvm) {}
904 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
909 static inline void kvm_irqfd_release(struct kvm *kvm) {}
911 #ifdef CONFIG_HAVE_KVM_IRQCHIP
912 static inline void kvm_irq_routing_update(struct kvm *kvm,
913 struct kvm_irq_routing_table *irq_rt)
915 rcu_assign_pointer(kvm->irq_routing, irq_rt);
919 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
924 #endif /* CONFIG_HAVE_KVM_EVENTFD */
926 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
927 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
929 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
932 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
936 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
940 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
942 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
947 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
955 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
957 set_bit(req, &vcpu->requests);
960 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
962 if (test_bit(req, &vcpu->requests)) {
963 clear_bit(req, &vcpu->requests);
970 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
972 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
974 vcpu->spin_loop.in_spin_loop = val;
976 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
978 vcpu->spin_loop.dy_eligible = val;
981 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
983 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
987 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
991 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu)
996 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */