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 <linux/irqflags.h>
26 #include <linux/context_tracking.h>
27 #include <linux/irqbypass.h>
28 #include <linux/swait.h>
29 #include <linux/refcount.h>
30 #include <asm/signal.h>
32 #include <linux/kvm.h>
33 #include <linux/kvm_para.h>
35 #include <linux/kvm_types.h>
37 #include <asm/kvm_host.h>
39 #ifndef KVM_MAX_VCPU_ID
40 #define KVM_MAX_VCPU_ID KVM_MAX_VCPUS
44 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
45 * in kvm, other bits are visible for userspace which are defined in
46 * include/linux/kvm_h.
48 #define KVM_MEMSLOT_INVALID (1UL << 16)
50 /* Two fragments for cross MMIO pages. */
51 #define KVM_MAX_MMIO_FRAGMENTS 2
53 #ifndef KVM_ADDRESS_SPACE_NUM
54 #define KVM_ADDRESS_SPACE_NUM 1
58 * For the normal pfn, the highest 12 bits should be zero,
59 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
60 * mask bit 63 to indicate the noslot pfn.
62 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
63 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
64 #define KVM_PFN_NOSLOT (0x1ULL << 63)
66 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
67 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
68 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
71 * error pfns indicate that the gfn is in slot but faild to
72 * translate it to pfn on host.
74 static inline bool is_error_pfn(kvm_pfn_t pfn)
76 return !!(pfn & KVM_PFN_ERR_MASK);
80 * error_noslot pfns indicate that the gfn can not be
81 * translated to pfn - it is not in slot or failed to
82 * translate it to pfn.
84 static inline bool is_error_noslot_pfn(kvm_pfn_t pfn)
86 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
89 /* noslot pfn indicates that the gfn is not in slot. */
90 static inline bool is_noslot_pfn(kvm_pfn_t pfn)
92 return pfn == KVM_PFN_NOSLOT;
96 * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390)
97 * provide own defines and kvm_is_error_hva
99 #ifndef KVM_HVA_ERR_BAD
101 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
102 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
104 static inline bool kvm_is_error_hva(unsigned long addr)
106 return addr >= PAGE_OFFSET;
111 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
113 static inline bool is_error_page(struct page *page)
118 #define KVM_REQUEST_MASK GENMASK(7,0)
119 #define KVM_REQUEST_NO_WAKEUP BIT(8)
120 #define KVM_REQUEST_WAIT BIT(9)
122 * Architecture-independent vcpu->requests bit members
123 * Bits 4-7 are reserved for more arch-independent bits.
125 #define KVM_REQ_TLB_FLUSH (0 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
126 #define KVM_REQ_MMU_RELOAD (1 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
127 #define KVM_REQ_PENDING_TIMER 2
128 #define KVM_REQ_UNHALT 3
130 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
131 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
133 extern struct kmem_cache *kvm_vcpu_cache;
135 extern spinlock_t kvm_lock;
136 extern struct list_head vm_list;
138 struct kvm_io_range {
141 struct kvm_io_device *dev;
144 #define NR_IOBUS_DEVS 1000
149 struct kvm_io_range range[];
155 KVM_VIRTIO_CCW_NOTIFY_BUS,
160 int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
161 int len, const void *val);
162 int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx,
163 gpa_t addr, int len, const void *val, long cookie);
164 int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
166 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
167 int len, struct kvm_io_device *dev);
168 void kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
169 struct kvm_io_device *dev);
170 struct kvm_io_device *kvm_io_bus_get_dev(struct kvm *kvm, enum kvm_bus bus_idx,
173 #ifdef CONFIG_KVM_ASYNC_PF
174 struct kvm_async_pf {
175 struct work_struct work;
176 struct list_head link;
177 struct list_head queue;
178 struct kvm_vcpu *vcpu;
179 struct mm_struct *mm;
182 struct kvm_arch_async_pf arch;
186 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
187 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
188 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva,
189 struct kvm_arch_async_pf *arch);
190 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
197 READING_SHADOW_PAGE_TABLES,
201 * Sometimes a large or cross-page mmio needs to be broken up into separate
202 * exits for userspace servicing.
204 struct kvm_mmio_fragment {
212 #ifdef CONFIG_PREEMPT_NOTIFIERS
213 struct preempt_notifier preempt_notifier;
219 unsigned long requests;
220 unsigned long guest_debug;
223 struct list_head blocked_vcpu_list;
228 int guest_fpu_loaded, guest_xcr0_loaded;
229 struct swait_queue_head wq;
233 struct kvm_vcpu_stat stat;
234 unsigned int halt_poll_ns;
237 #ifdef CONFIG_HAS_IOMEM
239 int mmio_read_completed;
241 int mmio_cur_fragment;
242 int mmio_nr_fragments;
243 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
246 #ifdef CONFIG_KVM_ASYNC_PF
249 struct list_head queue;
250 struct list_head done;
255 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
257 * Cpu relax intercept or pause loop exit optimization
258 * in_spin_loop: set when a vcpu does a pause loop exit
259 * or cpu relax intercepted.
260 * dy_eligible: indicates whether vcpu is eligible for directed yield.
268 struct kvm_vcpu_arch arch;
269 struct dentry *debugfs_dentry;
272 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
275 * The memory barrier ensures a previous write to vcpu->requests cannot
276 * be reordered with the read of vcpu->mode. It pairs with the general
277 * memory barrier following the write of vcpu->mode in VCPU RUN.
279 smp_mb__before_atomic();
280 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
284 * Some of the bitops functions do not support too long bitmaps.
285 * This number must be determined not to exceed such limits.
287 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
289 struct kvm_memory_slot {
291 unsigned long npages;
292 unsigned long *dirty_bitmap;
293 struct kvm_arch_memory_slot arch;
294 unsigned long userspace_addr;
299 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
301 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
304 struct kvm_s390_adapter_int {
317 struct kvm_kernel_irq_routing_entry {
320 int (*set)(struct kvm_kernel_irq_routing_entry *e,
321 struct kvm *kvm, int irq_source_id, int level,
335 struct kvm_s390_adapter_int adapter;
336 struct kvm_hv_sint hv_sint;
338 struct hlist_node link;
341 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
342 struct kvm_irq_routing_table {
343 int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS];
346 * Array indexed by gsi. Each entry contains list of irq chips
347 * the gsi is connected to.
349 struct hlist_head map[0];
353 #ifndef KVM_PRIVATE_MEM_SLOTS
354 #define KVM_PRIVATE_MEM_SLOTS 0
357 #ifndef KVM_MEM_SLOTS_NUM
358 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
361 #ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
362 static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
370 * memslots are not sorted by id anymore, please use id_to_memslot()
371 * to get the memslot by its id.
373 struct kvm_memslots {
375 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
376 /* The mapping table from slot id to the index in memslots[]. */
377 short id_to_index[KVM_MEM_SLOTS_NUM];
384 struct mutex slots_lock;
385 struct mm_struct *mm; /* userspace tied to this vm */
386 struct kvm_memslots *memslots[KVM_ADDRESS_SPACE_NUM];
387 struct srcu_struct srcu;
388 struct srcu_struct irq_srcu;
389 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
392 * created_vcpus is protected by kvm->lock, and is incremented
393 * at the beginning of KVM_CREATE_VCPU. online_vcpus is only
394 * incremented after storing the kvm_vcpu pointer in vcpus,
395 * and is accessed atomically.
397 atomic_t online_vcpus;
399 int last_boosted_vcpu;
400 struct list_head vm_list;
402 struct kvm_io_bus *buses[KVM_NR_BUSES];
403 #ifdef CONFIG_HAVE_KVM_EVENTFD
406 struct list_head items;
407 struct list_head resampler_list;
408 struct mutex resampler_lock;
410 struct list_head ioeventfds;
412 struct kvm_vm_stat stat;
413 struct kvm_arch arch;
414 refcount_t users_count;
415 #ifdef CONFIG_KVM_MMIO
416 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
417 spinlock_t ring_lock;
418 struct list_head coalesced_zones;
421 struct mutex irq_lock;
422 #ifdef CONFIG_HAVE_KVM_IRQCHIP
424 * Update side is protected by irq_lock.
426 struct kvm_irq_routing_table __rcu *irq_routing;
428 #ifdef CONFIG_HAVE_KVM_IRQFD
429 struct hlist_head irq_ack_notifier_list;
432 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
433 struct mmu_notifier mmu_notifier;
434 unsigned long mmu_notifier_seq;
435 long mmu_notifier_count;
438 struct list_head devices;
439 struct dentry *debugfs_dentry;
440 struct kvm_stat_data **debugfs_stat_data;
443 #define kvm_err(fmt, ...) \
444 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
445 #define kvm_info(fmt, ...) \
446 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
447 #define kvm_debug(fmt, ...) \
448 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
449 #define kvm_debug_ratelimited(fmt, ...) \
450 pr_debug_ratelimited("kvm [%i]: " fmt, task_pid_nr(current), \
452 #define kvm_pr_unimpl(fmt, ...) \
453 pr_err_ratelimited("kvm [%i]: " fmt, \
454 task_tgid_nr(current), ## __VA_ARGS__)
456 /* The guest did something we don't support. */
457 #define vcpu_unimpl(vcpu, fmt, ...) \
458 kvm_pr_unimpl("vcpu%i, guest rIP: 0x%lx " fmt, \
459 (vcpu)->vcpu_id, kvm_rip_read(vcpu), ## __VA_ARGS__)
461 #define vcpu_debug(vcpu, fmt, ...) \
462 kvm_debug("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
463 #define vcpu_debug_ratelimited(vcpu, fmt, ...) \
464 kvm_debug_ratelimited("vcpu%i " fmt, (vcpu)->vcpu_id, \
466 #define vcpu_err(vcpu, fmt, ...) \
467 kvm_err("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
469 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
471 /* Pairs with smp_wmb() in kvm_vm_ioctl_create_vcpu, in case
472 * the caller has read kvm->online_vcpus before (as is the case
473 * for kvm_for_each_vcpu, for example).
476 return kvm->vcpus[i];
479 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
481 idx < atomic_read(&kvm->online_vcpus) && \
482 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
485 static inline struct kvm_vcpu *kvm_get_vcpu_by_id(struct kvm *kvm, int id)
487 struct kvm_vcpu *vcpu = NULL;
492 if (id < KVM_MAX_VCPUS)
493 vcpu = kvm_get_vcpu(kvm, id);
494 if (vcpu && vcpu->vcpu_id == id)
496 kvm_for_each_vcpu(i, vcpu, kvm)
497 if (vcpu->vcpu_id == id)
502 #define kvm_for_each_memslot(memslot, slots) \
503 for (memslot = &slots->memslots[0]; \
504 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
507 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
508 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
510 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
511 void vcpu_put(struct kvm_vcpu *vcpu);
513 #ifdef __KVM_HAVE_IOAPIC
514 void kvm_arch_post_irq_ack_notifier_list_update(struct kvm *kvm);
515 void kvm_arch_post_irq_routing_update(struct kvm *kvm);
517 static inline void kvm_arch_post_irq_ack_notifier_list_update(struct kvm *kvm)
520 static inline void kvm_arch_post_irq_routing_update(struct kvm *kvm)
525 #ifdef CONFIG_HAVE_KVM_IRQFD
526 int kvm_irqfd_init(void);
527 void kvm_irqfd_exit(void);
529 static inline int kvm_irqfd_init(void)
534 static inline void kvm_irqfd_exit(void)
538 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
539 struct module *module);
542 void kvm_get_kvm(struct kvm *kvm);
543 void kvm_put_kvm(struct kvm *kvm);
545 static inline struct kvm_memslots *__kvm_memslots(struct kvm *kvm, int as_id)
547 return rcu_dereference_check(kvm->memslots[as_id],
548 srcu_read_lock_held(&kvm->srcu)
549 || lockdep_is_held(&kvm->slots_lock));
552 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
554 return __kvm_memslots(kvm, 0);
557 static inline struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu)
559 int as_id = kvm_arch_vcpu_memslots_id(vcpu);
561 return __kvm_memslots(vcpu->kvm, as_id);
564 static inline struct kvm_memory_slot *
565 id_to_memslot(struct kvm_memslots *slots, int id)
567 int index = slots->id_to_index[id];
568 struct kvm_memory_slot *slot;
570 slot = &slots->memslots[index];
572 WARN_ON(slot->id != id);
577 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
578 * - create a new memory slot
579 * - delete an existing memory slot
580 * - modify an existing memory slot
581 * -- move it in the guest physical memory space
582 * -- just change its flags
584 * Since flags can be changed by some of these operations, the following
585 * differentiation is the best we can do for __kvm_set_memory_region():
594 int kvm_set_memory_region(struct kvm *kvm,
595 const struct kvm_userspace_memory_region *mem);
596 int __kvm_set_memory_region(struct kvm *kvm,
597 const struct kvm_userspace_memory_region *mem);
598 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
599 struct kvm_memory_slot *dont);
600 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
601 unsigned long npages);
602 void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots);
603 int kvm_arch_prepare_memory_region(struct kvm *kvm,
604 struct kvm_memory_slot *memslot,
605 const struct kvm_userspace_memory_region *mem,
606 enum kvm_mr_change change);
607 void kvm_arch_commit_memory_region(struct kvm *kvm,
608 const struct kvm_userspace_memory_region *mem,
609 const struct kvm_memory_slot *old,
610 const struct kvm_memory_slot *new,
611 enum kvm_mr_change change);
612 bool kvm_largepages_enabled(void);
613 void kvm_disable_largepages(void);
614 /* flush all memory translations */
615 void kvm_arch_flush_shadow_all(struct kvm *kvm);
616 /* flush memory translations pointing to 'slot' */
617 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
618 struct kvm_memory_slot *slot);
620 int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn,
621 struct page **pages, int nr_pages);
623 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
624 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
625 unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable);
626 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
627 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn,
629 void kvm_release_page_clean(struct page *page);
630 void kvm_release_page_dirty(struct page *page);
631 void kvm_set_page_accessed(struct page *page);
633 kvm_pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
634 kvm_pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
635 kvm_pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
637 kvm_pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
638 kvm_pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
639 kvm_pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn,
640 bool atomic, bool *async, bool write_fault,
643 void kvm_release_pfn_clean(kvm_pfn_t pfn);
644 void kvm_set_pfn_dirty(kvm_pfn_t pfn);
645 void kvm_set_pfn_accessed(kvm_pfn_t pfn);
646 void kvm_get_pfn(kvm_pfn_t pfn);
648 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
650 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
652 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
653 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
654 void *data, unsigned long len);
655 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
656 int offset, int len);
657 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
659 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
660 void *data, unsigned long len);
661 int kvm_write_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
662 void *data, int offset, unsigned long len);
663 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
664 gpa_t gpa, unsigned long len);
665 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
666 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
667 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
668 bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
669 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
670 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
672 struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu);
673 struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn);
674 kvm_pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn);
675 kvm_pfn_t kvm_vcpu_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
676 struct page *kvm_vcpu_gfn_to_page(struct kvm_vcpu *vcpu, gfn_t gfn);
677 unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn);
678 unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu *vcpu, gfn_t gfn, bool *writable);
679 int kvm_vcpu_read_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, void *data, int offset,
681 int kvm_vcpu_read_guest_atomic(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
683 int kvm_vcpu_read_guest(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
685 int kvm_vcpu_write_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, const void *data,
686 int offset, int len);
687 int kvm_vcpu_write_guest(struct kvm_vcpu *vcpu, gpa_t gpa, const void *data,
689 void kvm_vcpu_mark_page_dirty(struct kvm_vcpu *vcpu, gfn_t gfn);
691 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
692 void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu);
693 void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu);
694 bool kvm_vcpu_wake_up(struct kvm_vcpu *vcpu);
695 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
696 int kvm_vcpu_yield_to(struct kvm_vcpu *target);
697 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
698 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
699 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
701 void kvm_flush_remote_tlbs(struct kvm *kvm);
702 void kvm_reload_remote_mmus(struct kvm *kvm);
703 bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);
705 long kvm_arch_dev_ioctl(struct file *filp,
706 unsigned int ioctl, unsigned long arg);
707 long kvm_arch_vcpu_ioctl(struct file *filp,
708 unsigned int ioctl, unsigned long arg);
709 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
711 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext);
713 int kvm_get_dirty_log(struct kvm *kvm,
714 struct kvm_dirty_log *log, int *is_dirty);
716 int kvm_get_dirty_log_protect(struct kvm *kvm,
717 struct kvm_dirty_log *log, bool *is_dirty);
719 void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
720 struct kvm_memory_slot *slot,
724 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
725 struct kvm_dirty_log *log);
727 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
729 long kvm_arch_vm_ioctl(struct file *filp,
730 unsigned int ioctl, unsigned long arg);
732 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
733 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
735 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
736 struct kvm_translation *tr);
738 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
739 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
740 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
741 struct kvm_sregs *sregs);
742 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
743 struct kvm_sregs *sregs);
744 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
745 struct kvm_mp_state *mp_state);
746 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
747 struct kvm_mp_state *mp_state);
748 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
749 struct kvm_guest_debug *dbg);
750 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
752 int kvm_arch_init(void *opaque);
753 void kvm_arch_exit(void);
755 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
756 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
758 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);
760 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
761 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
762 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
763 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
764 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
765 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
766 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
768 bool kvm_arch_has_vcpu_debugfs(void);
769 int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu);
771 int kvm_arch_hardware_enable(void);
772 void kvm_arch_hardware_disable(void);
773 int kvm_arch_hardware_setup(void);
774 void kvm_arch_hardware_unsetup(void);
775 void kvm_arch_check_processor_compat(void *rtn);
776 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
777 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
779 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
780 static inline struct kvm *kvm_arch_alloc_vm(void)
782 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
785 static inline void kvm_arch_free_vm(struct kvm *kvm)
791 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
792 void kvm_arch_register_noncoherent_dma(struct kvm *kvm);
793 void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm);
794 bool kvm_arch_has_noncoherent_dma(struct kvm *kvm);
796 static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm)
800 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm)
804 static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
809 #ifdef __KVM_HAVE_ARCH_ASSIGNED_DEVICE
810 void kvm_arch_start_assignment(struct kvm *kvm);
811 void kvm_arch_end_assignment(struct kvm *kvm);
812 bool kvm_arch_has_assigned_device(struct kvm *kvm);
814 static inline void kvm_arch_start_assignment(struct kvm *kvm)
818 static inline void kvm_arch_end_assignment(struct kvm *kvm)
822 static inline bool kvm_arch_has_assigned_device(struct kvm *kvm)
828 static inline struct swait_queue_head *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
830 #ifdef __KVM_HAVE_ARCH_WQP
831 return vcpu->arch.wqp;
837 #ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
839 * returns true if the virtual interrupt controller is initialized and
840 * ready to accept virtual IRQ. On some architectures the virtual interrupt
841 * controller is dynamically instantiated and this is not always true.
843 bool kvm_arch_intc_initialized(struct kvm *kvm);
845 static inline bool kvm_arch_intc_initialized(struct kvm *kvm)
851 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
852 void kvm_arch_destroy_vm(struct kvm *kvm);
853 void kvm_arch_sync_events(struct kvm *kvm);
855 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
856 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
858 bool kvm_is_reserved_pfn(kvm_pfn_t pfn);
860 struct kvm_irq_ack_notifier {
861 struct hlist_node link;
863 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
866 int kvm_irq_map_gsi(struct kvm *kvm,
867 struct kvm_kernel_irq_routing_entry *entries, int gsi);
868 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin);
870 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
872 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
873 int irq_source_id, int level, bool line_status);
874 int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
875 struct kvm *kvm, int irq_source_id,
876 int level, bool line_status);
877 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
878 void kvm_notify_acked_gsi(struct kvm *kvm, int gsi);
879 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
880 void kvm_register_irq_ack_notifier(struct kvm *kvm,
881 struct kvm_irq_ack_notifier *kian);
882 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
883 struct kvm_irq_ack_notifier *kian);
884 int kvm_request_irq_source_id(struct kvm *kvm);
885 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
888 * search_memslots() and __gfn_to_memslot() are here because they are
889 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
890 * gfn_to_memslot() itself isn't here as an inline because that would
891 * bloat other code too much.
893 static inline struct kvm_memory_slot *
894 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
896 int start = 0, end = slots->used_slots;
897 int slot = atomic_read(&slots->lru_slot);
898 struct kvm_memory_slot *memslots = slots->memslots;
900 if (gfn >= memslots[slot].base_gfn &&
901 gfn < memslots[slot].base_gfn + memslots[slot].npages)
902 return &memslots[slot];
904 while (start < end) {
905 slot = start + (end - start) / 2;
907 if (gfn >= memslots[slot].base_gfn)
913 if (gfn >= memslots[start].base_gfn &&
914 gfn < memslots[start].base_gfn + memslots[start].npages) {
915 atomic_set(&slots->lru_slot, start);
916 return &memslots[start];
922 static inline struct kvm_memory_slot *
923 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
925 return search_memslots(slots, gfn);
928 static inline unsigned long
929 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
931 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
934 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
936 return gfn_to_memslot(kvm, gfn)->id;
940 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
942 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
944 return slot->base_gfn + gfn_offset;
947 static inline gpa_t gfn_to_gpa(gfn_t gfn)
949 return (gpa_t)gfn << PAGE_SHIFT;
952 static inline gfn_t gpa_to_gfn(gpa_t gpa)
954 return (gfn_t)(gpa >> PAGE_SHIFT);
957 static inline hpa_t pfn_to_hpa(kvm_pfn_t pfn)
959 return (hpa_t)pfn << PAGE_SHIFT;
962 static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa)
964 unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
966 return kvm_is_error_hva(hva);
974 struct kvm_stat_data {
979 struct kvm_stats_debugfs_item {
982 enum kvm_stat_kind kind;
984 extern struct kvm_stats_debugfs_item debugfs_entries[];
985 extern struct dentry *kvm_debugfs_dir;
987 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
988 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
990 if (unlikely(kvm->mmu_notifier_count))
993 * Ensure the read of mmu_notifier_count happens before the read
994 * of mmu_notifier_seq. This interacts with the smp_wmb() in
995 * mmu_notifier_invalidate_range_end to make sure that the caller
996 * either sees the old (non-zero) value of mmu_notifier_count or
997 * the new (incremented) value of mmu_notifier_seq.
998 * PowerPC Book3s HV KVM calls this under a per-page lock
999 * rather than under kvm->mmu_lock, for scalability, so
1000 * can't rely on kvm->mmu_lock to keep things ordered.
1003 if (kvm->mmu_notifier_seq != mmu_seq)
1009 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
1012 #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that...
1013 #elif defined(CONFIG_ARM64)
1014 #define KVM_MAX_IRQ_ROUTES 4096
1016 #define KVM_MAX_IRQ_ROUTES 1024
1019 bool kvm_arch_can_set_irq_routing(struct kvm *kvm);
1020 int kvm_set_irq_routing(struct kvm *kvm,
1021 const struct kvm_irq_routing_entry *entries,
1024 int kvm_set_routing_entry(struct kvm *kvm,
1025 struct kvm_kernel_irq_routing_entry *e,
1026 const struct kvm_irq_routing_entry *ue);
1027 void kvm_free_irq_routing(struct kvm *kvm);
1031 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
1035 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
1037 #ifdef CONFIG_HAVE_KVM_EVENTFD
1039 void kvm_eventfd_init(struct kvm *kvm);
1040 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
1042 #ifdef CONFIG_HAVE_KVM_IRQFD
1043 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
1044 void kvm_irqfd_release(struct kvm *kvm);
1045 void kvm_irq_routing_update(struct kvm *);
1047 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1052 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1057 static inline void kvm_eventfd_init(struct kvm *kvm) {}
1059 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1064 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1066 #ifdef CONFIG_HAVE_KVM_IRQCHIP
1067 static inline void kvm_irq_routing_update(struct kvm *kvm)
1071 void kvm_arch_irq_routing_update(struct kvm *kvm);
1073 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
1078 #endif /* CONFIG_HAVE_KVM_EVENTFD */
1080 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1083 * Ensure the rest of the request is published to kvm_check_request's
1084 * caller. Paired with the smp_mb__after_atomic in kvm_check_request.
1087 set_bit(req & KVM_REQUEST_MASK, &vcpu->requests);
1090 static inline bool kvm_test_request(int req, struct kvm_vcpu *vcpu)
1092 return test_bit(req & KVM_REQUEST_MASK, &vcpu->requests);
1095 static inline void kvm_clear_request(int req, struct kvm_vcpu *vcpu)
1097 clear_bit(req & KVM_REQUEST_MASK, &vcpu->requests);
1100 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1102 if (kvm_test_request(req, vcpu)) {
1103 kvm_clear_request(req, vcpu);
1106 * Ensure the rest of the request is visible to kvm_check_request's
1107 * caller. Paired with the smp_wmb in kvm_make_request.
1109 smp_mb__after_atomic();
1116 extern bool kvm_rebooting;
1118 extern unsigned int halt_poll_ns;
1119 extern unsigned int halt_poll_ns_grow;
1120 extern unsigned int halt_poll_ns_shrink;
1123 struct kvm_device_ops *ops;
1126 struct list_head vm_node;
1129 /* create, destroy, and name are mandatory */
1130 struct kvm_device_ops {
1134 * create is called holding kvm->lock and any operations not suitable
1135 * to do while holding the lock should be deferred to init (see
1138 int (*create)(struct kvm_device *dev, u32 type);
1141 * init is called after create if create is successful and is called
1142 * outside of holding kvm->lock.
1144 void (*init)(struct kvm_device *dev);
1147 * Destroy is responsible for freeing dev.
1149 * Destroy may be called before or after destructors are called
1150 * on emulated I/O regions, depending on whether a reference is
1151 * held by a vcpu or other kvm component that gets destroyed
1152 * after the emulated I/O.
1154 void (*destroy)(struct kvm_device *dev);
1156 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1157 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1158 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1159 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1163 void kvm_device_get(struct kvm_device *dev);
1164 void kvm_device_put(struct kvm_device *dev);
1165 struct kvm_device *kvm_device_from_filp(struct file *filp);
1166 int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type);
1167 void kvm_unregister_device_ops(u32 type);
1169 extern struct kvm_device_ops kvm_mpic_ops;
1170 extern struct kvm_device_ops kvm_xics_ops;
1171 extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
1172 extern struct kvm_device_ops kvm_arm_vgic_v3_ops;
1174 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1176 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1178 vcpu->spin_loop.in_spin_loop = val;
1180 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1182 vcpu->spin_loop.dy_eligible = val;
1185 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1187 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1191 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1194 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1196 #ifdef CONFIG_HAVE_KVM_IRQ_BYPASS
1197 bool kvm_arch_has_irq_bypass(void);
1198 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *,
1199 struct irq_bypass_producer *);
1200 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *,
1201 struct irq_bypass_producer *);
1202 void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *);
1203 void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *);
1204 int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq,
1205 uint32_t guest_irq, bool set);
1206 #endif /* CONFIG_HAVE_KVM_IRQ_BYPASS */
1208 #ifdef CONFIG_HAVE_KVM_INVALID_WAKEUPS
1209 /* If we wakeup during the poll time, was it a sucessful poll? */
1210 static inline bool vcpu_valid_wakeup(struct kvm_vcpu *vcpu)
1212 return vcpu->valid_wakeup;
1216 static inline bool vcpu_valid_wakeup(struct kvm_vcpu *vcpu)
1220 #endif /* CONFIG_HAVE_KVM_INVALID_WAKEUPS */