1 /* SPDX-License-Identifier: GPL-2.0-only */
6 #include <linux/types.h>
7 #include <linux/hardirq.h>
8 #include <linux/list.h>
9 #include <linux/mutex.h>
10 #include <linux/spinlock.h>
11 #include <linux/signal.h>
12 #include <linux/sched.h>
13 #include <linux/bug.h>
15 #include <linux/mmu_notifier.h>
16 #include <linux/preempt.h>
17 #include <linux/msi.h>
18 #include <linux/slab.h>
19 #include <linux/vmalloc.h>
20 #include <linux/rcupdate.h>
21 #include <linux/ratelimit.h>
22 #include <linux/err.h>
23 #include <linux/irqflags.h>
24 #include <linux/context_tracking.h>
25 #include <linux/irqbypass.h>
26 #include <linux/rcuwait.h>
27 #include <linux/refcount.h>
28 #include <linux/nospec.h>
29 #include <asm/signal.h>
31 #include <linux/kvm.h>
32 #include <linux/kvm_para.h>
34 #include <linux/kvm_types.h>
36 #include <asm/kvm_host.h>
37 #include <linux/kvm_dirty_ring.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)
51 * Bit 63 of the memslot generation number is an "update in-progress flag",
52 * e.g. is temporarily set for the duration of install_new_memslots().
53 * This flag effectively creates a unique generation number that is used to
54 * mark cached memslot data, e.g. MMIO accesses, as potentially being stale,
55 * i.e. may (or may not) have come from the previous memslots generation.
57 * This is necessary because the actual memslots update is not atomic with
58 * respect to the generation number update. Updating the generation number
59 * first would allow a vCPU to cache a spte from the old memslots using the
60 * new generation number, and updating the generation number after switching
61 * to the new memslots would allow cache hits using the old generation number
62 * to reference the defunct memslots.
64 * This mechanism is used to prevent getting hits in KVM's caches while a
65 * memslot update is in-progress, and to prevent cache hits *after* updating
66 * the actual generation number against accesses that were inserted into the
67 * cache *before* the memslots were updated.
69 #define KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS BIT_ULL(63)
71 /* Two fragments for cross MMIO pages. */
72 #define KVM_MAX_MMIO_FRAGMENTS 2
74 #ifndef KVM_ADDRESS_SPACE_NUM
75 #define KVM_ADDRESS_SPACE_NUM 1
79 * For the normal pfn, the highest 12 bits should be zero,
80 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
81 * mask bit 63 to indicate the noslot pfn.
83 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
84 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
85 #define KVM_PFN_NOSLOT (0x1ULL << 63)
87 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
88 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
89 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
92 * error pfns indicate that the gfn is in slot but faild to
93 * translate it to pfn on host.
95 static inline bool is_error_pfn(kvm_pfn_t pfn)
97 return !!(pfn & KVM_PFN_ERR_MASK);
101 * error_noslot pfns indicate that the gfn can not be
102 * translated to pfn - it is not in slot or failed to
103 * translate it to pfn.
105 static inline bool is_error_noslot_pfn(kvm_pfn_t pfn)
107 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
110 /* noslot pfn indicates that the gfn is not in slot. */
111 static inline bool is_noslot_pfn(kvm_pfn_t pfn)
113 return pfn == KVM_PFN_NOSLOT;
117 * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390)
118 * provide own defines and kvm_is_error_hva
120 #ifndef KVM_HVA_ERR_BAD
122 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
123 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
125 static inline bool kvm_is_error_hva(unsigned long addr)
127 return addr >= PAGE_OFFSET;
132 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
134 static inline bool is_error_page(struct page *page)
139 #define KVM_REQUEST_MASK GENMASK(7,0)
140 #define KVM_REQUEST_NO_WAKEUP BIT(8)
141 #define KVM_REQUEST_WAIT BIT(9)
143 * Architecture-independent vcpu->requests bit members
144 * Bits 4-7 are reserved for more arch-independent bits.
146 #define KVM_REQ_TLB_FLUSH (0 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
147 #define KVM_REQ_MMU_RELOAD (1 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
148 #define KVM_REQ_PENDING_TIMER 2
149 #define KVM_REQ_UNHALT 3
150 #define KVM_REQUEST_ARCH_BASE 8
152 #define KVM_ARCH_REQ_FLAGS(nr, flags) ({ \
153 BUILD_BUG_ON((unsigned)(nr) >= (sizeof_field(struct kvm_vcpu, requests) * 8) - KVM_REQUEST_ARCH_BASE); \
154 (unsigned)(((nr) + KVM_REQUEST_ARCH_BASE) | (flags)); \
156 #define KVM_ARCH_REQ(nr) KVM_ARCH_REQ_FLAGS(nr, 0)
158 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
159 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
161 extern struct mutex kvm_lock;
162 extern struct list_head vm_list;
164 struct kvm_io_range {
167 struct kvm_io_device *dev;
170 #define NR_IOBUS_DEVS 1000
175 struct kvm_io_range range[];
181 KVM_VIRTIO_CCW_NOTIFY_BUS,
186 int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
187 int len, const void *val);
188 int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx,
189 gpa_t addr, int len, const void *val, long cookie);
190 int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
192 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
193 int len, struct kvm_io_device *dev);
194 void kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
195 struct kvm_io_device *dev);
196 struct kvm_io_device *kvm_io_bus_get_dev(struct kvm *kvm, enum kvm_bus bus_idx,
199 #ifdef CONFIG_KVM_ASYNC_PF
200 struct kvm_async_pf {
201 struct work_struct work;
202 struct list_head link;
203 struct list_head queue;
204 struct kvm_vcpu *vcpu;
205 struct mm_struct *mm;
208 struct kvm_arch_async_pf arch;
210 bool notpresent_injected;
213 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
214 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
215 bool kvm_setup_async_pf(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
216 unsigned long hva, struct kvm_arch_async_pf *arch);
217 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
224 READING_SHADOW_PAGE_TABLES,
227 #define KVM_UNMAPPED_PAGE ((void *) 0x500 + POISON_POINTER_DELTA)
229 struct kvm_host_map {
231 * Only valid if the 'pfn' is managed by the host kernel (i.e. There is
232 * a 'struct page' for it. When using mem= kernel parameter some memory
233 * can be used as guest memory but they are not managed by host
235 * If 'pfn' is not managed by the host kernel, this field is
236 * initialized to KVM_UNMAPPED_PAGE.
245 * Used to check if the mapping is valid or not. Never use 'kvm_host_map'
246 * directly to check for that.
248 static inline bool kvm_vcpu_mapped(struct kvm_host_map *map)
254 * Sometimes a large or cross-page mmio needs to be broken up into separate
255 * exits for userspace servicing.
257 struct kvm_mmio_fragment {
265 #ifdef CONFIG_PREEMPT_NOTIFIERS
266 struct preempt_notifier preempt_notifier;
269 int vcpu_id; /* id given by userspace at creation */
270 int vcpu_idx; /* index in kvm->vcpus array */
274 unsigned long guest_debug;
277 struct list_head blocked_vcpu_list;
283 struct pid __rcu *pid;
286 struct kvm_vcpu_stat stat;
287 unsigned int halt_poll_ns;
290 #ifdef CONFIG_HAS_IOMEM
292 int mmio_read_completed;
294 int mmio_cur_fragment;
295 int mmio_nr_fragments;
296 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
299 #ifdef CONFIG_KVM_ASYNC_PF
302 struct list_head queue;
303 struct list_head done;
308 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
310 * Cpu relax intercept or pause loop exit optimization
311 * in_spin_loop: set when a vcpu does a pause loop exit
312 * or cpu relax intercepted.
313 * dy_eligible: indicates whether vcpu is eligible for directed yield.
322 struct kvm_vcpu_arch arch;
323 struct kvm_dirty_ring dirty_ring;
326 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
329 * The memory barrier ensures a previous write to vcpu->requests cannot
330 * be reordered with the read of vcpu->mode. It pairs with the general
331 * memory barrier following the write of vcpu->mode in VCPU RUN.
333 smp_mb__before_atomic();
334 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
338 * Some of the bitops functions do not support too long bitmaps.
339 * This number must be determined not to exceed such limits.
341 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
343 struct kvm_memory_slot {
345 unsigned long npages;
346 unsigned long *dirty_bitmap;
347 struct kvm_arch_memory_slot arch;
348 unsigned long userspace_addr;
354 static inline bool kvm_slot_dirty_track_enabled(struct kvm_memory_slot *slot)
356 return slot->flags & KVM_MEM_LOG_DIRTY_PAGES;
359 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
361 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
364 static inline unsigned long *kvm_second_dirty_bitmap(struct kvm_memory_slot *memslot)
366 unsigned long len = kvm_dirty_bitmap_bytes(memslot);
368 return memslot->dirty_bitmap + len / sizeof(*memslot->dirty_bitmap);
371 #ifndef KVM_DIRTY_LOG_MANUAL_CAPS
372 #define KVM_DIRTY_LOG_MANUAL_CAPS KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE
375 struct kvm_s390_adapter_int {
388 struct kvm_kernel_irq_routing_entry {
391 int (*set)(struct kvm_kernel_irq_routing_entry *e,
392 struct kvm *kvm, int irq_source_id, int level,
406 struct kvm_s390_adapter_int adapter;
407 struct kvm_hv_sint hv_sint;
409 struct hlist_node link;
412 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
413 struct kvm_irq_routing_table {
414 int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS];
417 * Array indexed by gsi. Each entry contains list of irq chips
418 * the gsi is connected to.
420 struct hlist_head map[];
424 #ifndef KVM_PRIVATE_MEM_SLOTS
425 #define KVM_PRIVATE_MEM_SLOTS 0
428 #define KVM_MEM_SLOTS_NUM SHRT_MAX
429 #define KVM_USER_MEM_SLOTS (KVM_MEM_SLOTS_NUM - KVM_PRIVATE_MEM_SLOTS)
431 #ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
432 static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
440 * memslots are not sorted by id anymore, please use id_to_memslot()
441 * to get the memslot by its id.
443 struct kvm_memslots {
445 /* The mapping table from slot id to the index in memslots[]. */
446 short id_to_index[KVM_MEM_SLOTS_NUM];
449 struct kvm_memory_slot memslots[];
453 #ifdef KVM_HAVE_MMU_RWLOCK
457 #endif /* KVM_HAVE_MMU_RWLOCK */
459 struct mutex slots_lock;
460 struct mm_struct *mm; /* userspace tied to this vm */
461 struct kvm_memslots __rcu *memslots[KVM_ADDRESS_SPACE_NUM];
462 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
465 * created_vcpus is protected by kvm->lock, and is incremented
466 * at the beginning of KVM_CREATE_VCPU. online_vcpus is only
467 * incremented after storing the kvm_vcpu pointer in vcpus,
468 * and is accessed atomically.
470 atomic_t online_vcpus;
472 int last_boosted_vcpu;
473 struct list_head vm_list;
475 struct kvm_io_bus __rcu *buses[KVM_NR_BUSES];
476 #ifdef CONFIG_HAVE_KVM_EVENTFD
479 struct list_head items;
480 struct list_head resampler_list;
481 struct mutex resampler_lock;
483 struct list_head ioeventfds;
485 struct kvm_vm_stat stat;
486 struct kvm_arch arch;
487 refcount_t users_count;
488 #ifdef CONFIG_KVM_MMIO
489 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
490 spinlock_t ring_lock;
491 struct list_head coalesced_zones;
494 struct mutex irq_lock;
495 #ifdef CONFIG_HAVE_KVM_IRQCHIP
497 * Update side is protected by irq_lock.
499 struct kvm_irq_routing_table __rcu *irq_routing;
501 #ifdef CONFIG_HAVE_KVM_IRQFD
502 struct hlist_head irq_ack_notifier_list;
505 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
506 struct mmu_notifier mmu_notifier;
507 unsigned long mmu_notifier_seq;
508 long mmu_notifier_count;
511 struct list_head devices;
512 u64 manual_dirty_log_protect;
513 struct dentry *debugfs_dentry;
514 struct kvm_stat_data **debugfs_stat_data;
515 struct srcu_struct srcu;
516 struct srcu_struct irq_srcu;
518 unsigned int max_halt_poll_ns;
522 #define kvm_err(fmt, ...) \
523 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
524 #define kvm_info(fmt, ...) \
525 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
526 #define kvm_debug(fmt, ...) \
527 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
528 #define kvm_debug_ratelimited(fmt, ...) \
529 pr_debug_ratelimited("kvm [%i]: " fmt, task_pid_nr(current), \
531 #define kvm_pr_unimpl(fmt, ...) \
532 pr_err_ratelimited("kvm [%i]: " fmt, \
533 task_tgid_nr(current), ## __VA_ARGS__)
535 /* The guest did something we don't support. */
536 #define vcpu_unimpl(vcpu, fmt, ...) \
537 kvm_pr_unimpl("vcpu%i, guest rIP: 0x%lx " fmt, \
538 (vcpu)->vcpu_id, kvm_rip_read(vcpu), ## __VA_ARGS__)
540 #define vcpu_debug(vcpu, fmt, ...) \
541 kvm_debug("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
542 #define vcpu_debug_ratelimited(vcpu, fmt, ...) \
543 kvm_debug_ratelimited("vcpu%i " fmt, (vcpu)->vcpu_id, \
545 #define vcpu_err(vcpu, fmt, ...) \
546 kvm_err("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
548 static inline bool kvm_dirty_log_manual_protect_and_init_set(struct kvm *kvm)
550 return !!(kvm->manual_dirty_log_protect & KVM_DIRTY_LOG_INITIALLY_SET);
553 static inline struct kvm_io_bus *kvm_get_bus(struct kvm *kvm, enum kvm_bus idx)
555 return srcu_dereference_check(kvm->buses[idx], &kvm->srcu,
556 lockdep_is_held(&kvm->slots_lock) ||
557 !refcount_read(&kvm->users_count));
560 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
562 int num_vcpus = atomic_read(&kvm->online_vcpus);
563 i = array_index_nospec(i, num_vcpus);
565 /* Pairs with smp_wmb() in kvm_vm_ioctl_create_vcpu. */
567 return kvm->vcpus[i];
570 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
572 idx < atomic_read(&kvm->online_vcpus) && \
573 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
576 static inline struct kvm_vcpu *kvm_get_vcpu_by_id(struct kvm *kvm, int id)
578 struct kvm_vcpu *vcpu = NULL;
583 if (id < KVM_MAX_VCPUS)
584 vcpu = kvm_get_vcpu(kvm, id);
585 if (vcpu && vcpu->vcpu_id == id)
587 kvm_for_each_vcpu(i, vcpu, kvm)
588 if (vcpu->vcpu_id == id)
593 static inline int kvm_vcpu_get_idx(struct kvm_vcpu *vcpu)
595 return vcpu->vcpu_idx;
598 #define kvm_for_each_memslot(memslot, slots) \
599 for (memslot = &slots->memslots[0]; \
600 memslot < slots->memslots + slots->used_slots; memslot++) \
601 if (WARN_ON_ONCE(!memslot->npages)) { \
604 void kvm_vcpu_destroy(struct kvm_vcpu *vcpu);
606 void vcpu_load(struct kvm_vcpu *vcpu);
607 void vcpu_put(struct kvm_vcpu *vcpu);
609 #ifdef __KVM_HAVE_IOAPIC
610 void kvm_arch_post_irq_ack_notifier_list_update(struct kvm *kvm);
611 void kvm_arch_post_irq_routing_update(struct kvm *kvm);
613 static inline void kvm_arch_post_irq_ack_notifier_list_update(struct kvm *kvm)
616 static inline void kvm_arch_post_irq_routing_update(struct kvm *kvm)
621 #ifdef CONFIG_HAVE_KVM_IRQFD
622 int kvm_irqfd_init(void);
623 void kvm_irqfd_exit(void);
625 static inline int kvm_irqfd_init(void)
630 static inline void kvm_irqfd_exit(void)
634 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
635 struct module *module);
638 void kvm_get_kvm(struct kvm *kvm);
639 void kvm_put_kvm(struct kvm *kvm);
640 void kvm_put_kvm_no_destroy(struct kvm *kvm);
642 static inline struct kvm_memslots *__kvm_memslots(struct kvm *kvm, int as_id)
644 as_id = array_index_nospec(as_id, KVM_ADDRESS_SPACE_NUM);
645 return srcu_dereference_check(kvm->memslots[as_id], &kvm->srcu,
646 lockdep_is_held(&kvm->slots_lock) ||
647 !refcount_read(&kvm->users_count));
650 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
652 return __kvm_memslots(kvm, 0);
655 static inline struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu)
657 int as_id = kvm_arch_vcpu_memslots_id(vcpu);
659 return __kvm_memslots(vcpu->kvm, as_id);
663 struct kvm_memory_slot *id_to_memslot(struct kvm_memslots *slots, int id)
665 int index = slots->id_to_index[id];
666 struct kvm_memory_slot *slot;
671 slot = &slots->memslots[index];
673 WARN_ON(slot->id != id);
678 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
679 * - create a new memory slot
680 * - delete an existing memory slot
681 * - modify an existing memory slot
682 * -- move it in the guest physical memory space
683 * -- just change its flags
685 * Since flags can be changed by some of these operations, the following
686 * differentiation is the best we can do for __kvm_set_memory_region():
695 int kvm_set_memory_region(struct kvm *kvm,
696 const struct kvm_userspace_memory_region *mem);
697 int __kvm_set_memory_region(struct kvm *kvm,
698 const struct kvm_userspace_memory_region *mem);
699 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot);
700 void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen);
701 int kvm_arch_prepare_memory_region(struct kvm *kvm,
702 struct kvm_memory_slot *memslot,
703 const struct kvm_userspace_memory_region *mem,
704 enum kvm_mr_change change);
705 void kvm_arch_commit_memory_region(struct kvm *kvm,
706 const struct kvm_userspace_memory_region *mem,
707 struct kvm_memory_slot *old,
708 const struct kvm_memory_slot *new,
709 enum kvm_mr_change change);
710 /* flush all memory translations */
711 void kvm_arch_flush_shadow_all(struct kvm *kvm);
712 /* flush memory translations pointing to 'slot' */
713 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
714 struct kvm_memory_slot *slot);
716 int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn,
717 struct page **pages, int nr_pages);
719 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
720 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
721 unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable);
722 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
723 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn,
725 void kvm_release_page_clean(struct page *page);
726 void kvm_release_page_dirty(struct page *page);
727 void kvm_set_page_accessed(struct page *page);
729 kvm_pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
730 kvm_pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
732 kvm_pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
733 kvm_pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
734 kvm_pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn,
735 bool atomic, bool *async, bool write_fault,
738 void kvm_release_pfn_clean(kvm_pfn_t pfn);
739 void kvm_release_pfn_dirty(kvm_pfn_t pfn);
740 void kvm_set_pfn_dirty(kvm_pfn_t pfn);
741 void kvm_set_pfn_accessed(kvm_pfn_t pfn);
742 void kvm_get_pfn(kvm_pfn_t pfn);
744 void kvm_release_pfn(kvm_pfn_t pfn, bool dirty, struct gfn_to_pfn_cache *cache);
745 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
747 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
748 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
749 void *data, unsigned long len);
750 int kvm_read_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
751 void *data, unsigned int offset,
753 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
754 int offset, int len);
755 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
757 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
758 void *data, unsigned long len);
759 int kvm_write_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
760 void *data, unsigned int offset,
762 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
763 gpa_t gpa, unsigned long len);
765 #define __kvm_get_guest(kvm, gfn, offset, v) \
767 unsigned long __addr = gfn_to_hva(kvm, gfn); \
768 typeof(v) __user *__uaddr = (typeof(__uaddr))(__addr + offset); \
769 int __ret = -EFAULT; \
771 if (!kvm_is_error_hva(__addr)) \
772 __ret = get_user(v, __uaddr); \
776 #define kvm_get_guest(kvm, gpa, v) \
779 struct kvm *__kvm = kvm; \
781 __kvm_get_guest(__kvm, __gpa >> PAGE_SHIFT, \
782 offset_in_page(__gpa), v); \
785 #define __kvm_put_guest(kvm, gfn, offset, v) \
787 unsigned long __addr = gfn_to_hva(kvm, gfn); \
788 typeof(v) __user *__uaddr = (typeof(__uaddr))(__addr + offset); \
789 int __ret = -EFAULT; \
791 if (!kvm_is_error_hva(__addr)) \
792 __ret = put_user(v, __uaddr); \
794 mark_page_dirty(kvm, gfn); \
798 #define kvm_put_guest(kvm, gpa, v) \
801 struct kvm *__kvm = kvm; \
803 __kvm_put_guest(__kvm, __gpa >> PAGE_SHIFT, \
804 offset_in_page(__gpa), v); \
807 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
808 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
809 bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
810 bool kvm_vcpu_is_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn);
811 unsigned long kvm_host_page_size(struct kvm_vcpu *vcpu, gfn_t gfn);
812 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot, gfn_t gfn);
813 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
815 struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu);
816 struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn);
817 kvm_pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn);
818 kvm_pfn_t kvm_vcpu_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
819 int kvm_vcpu_map(struct kvm_vcpu *vcpu, gpa_t gpa, struct kvm_host_map *map);
820 int kvm_map_gfn(struct kvm_vcpu *vcpu, gfn_t gfn, struct kvm_host_map *map,
821 struct gfn_to_pfn_cache *cache, bool atomic);
822 struct page *kvm_vcpu_gfn_to_page(struct kvm_vcpu *vcpu, gfn_t gfn);
823 void kvm_vcpu_unmap(struct kvm_vcpu *vcpu, struct kvm_host_map *map, bool dirty);
824 int kvm_unmap_gfn(struct kvm_vcpu *vcpu, struct kvm_host_map *map,
825 struct gfn_to_pfn_cache *cache, bool dirty, bool atomic);
826 unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn);
827 unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu *vcpu, gfn_t gfn, bool *writable);
828 int kvm_vcpu_read_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, void *data, int offset,
830 int kvm_vcpu_read_guest_atomic(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
832 int kvm_vcpu_read_guest(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
834 int kvm_vcpu_write_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, const void *data,
835 int offset, int len);
836 int kvm_vcpu_write_guest(struct kvm_vcpu *vcpu, gpa_t gpa, const void *data,
838 void kvm_vcpu_mark_page_dirty(struct kvm_vcpu *vcpu, gfn_t gfn);
840 void kvm_sigset_activate(struct kvm_vcpu *vcpu);
841 void kvm_sigset_deactivate(struct kvm_vcpu *vcpu);
843 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
844 void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu);
845 void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu);
846 bool kvm_vcpu_wake_up(struct kvm_vcpu *vcpu);
847 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
848 int kvm_vcpu_yield_to(struct kvm_vcpu *target);
849 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu, bool usermode_vcpu_not_eligible);
851 void kvm_flush_remote_tlbs(struct kvm *kvm);
852 void kvm_reload_remote_mmus(struct kvm *kvm);
854 #ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE
855 int kvm_mmu_topup_memory_cache(struct kvm_mmu_memory_cache *mc, int min);
856 int kvm_mmu_memory_cache_nr_free_objects(struct kvm_mmu_memory_cache *mc);
857 void kvm_mmu_free_memory_cache(struct kvm_mmu_memory_cache *mc);
858 void *kvm_mmu_memory_cache_alloc(struct kvm_mmu_memory_cache *mc);
861 bool kvm_make_vcpus_request_mask(struct kvm *kvm, unsigned int req,
862 struct kvm_vcpu *except,
863 unsigned long *vcpu_bitmap, cpumask_var_t tmp);
864 bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);
865 bool kvm_make_all_cpus_request_except(struct kvm *kvm, unsigned int req,
866 struct kvm_vcpu *except);
867 bool kvm_make_cpus_request_mask(struct kvm *kvm, unsigned int req,
868 unsigned long *vcpu_bitmap);
870 long kvm_arch_dev_ioctl(struct file *filp,
871 unsigned int ioctl, unsigned long arg);
872 long kvm_arch_vcpu_ioctl(struct file *filp,
873 unsigned int ioctl, unsigned long arg);
874 vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
876 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext);
878 void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
879 struct kvm_memory_slot *slot,
882 void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot);
884 #ifdef CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT
885 void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm,
886 struct kvm_memory_slot *memslot);
887 #else /* !CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT */
888 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log);
889 int kvm_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log,
890 int *is_dirty, struct kvm_memory_slot **memslot);
893 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
895 int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
896 struct kvm_enable_cap *cap);
897 long kvm_arch_vm_ioctl(struct file *filp,
898 unsigned int ioctl, unsigned long arg);
900 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
901 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
903 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
904 struct kvm_translation *tr);
906 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
907 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
908 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
909 struct kvm_sregs *sregs);
910 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
911 struct kvm_sregs *sregs);
912 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
913 struct kvm_mp_state *mp_state);
914 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
915 struct kvm_mp_state *mp_state);
916 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
917 struct kvm_guest_debug *dbg);
918 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu);
920 int kvm_arch_init(void *opaque);
921 void kvm_arch_exit(void);
923 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);
925 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
926 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
927 int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id);
928 int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu);
929 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
930 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
932 #ifdef __KVM_HAVE_ARCH_VCPU_DEBUGFS
933 void kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry);
936 int kvm_arch_hardware_enable(void);
937 void kvm_arch_hardware_disable(void);
938 int kvm_arch_hardware_setup(void *opaque);
939 void kvm_arch_hardware_unsetup(void);
940 int kvm_arch_check_processor_compat(void *opaque);
941 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
942 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu);
943 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
944 bool kvm_arch_dy_runnable(struct kvm_vcpu *vcpu);
945 int kvm_arch_post_init_vm(struct kvm *kvm);
946 void kvm_arch_pre_destroy_vm(struct kvm *kvm);
948 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
950 * All architectures that want to use vzalloc currently also
951 * need their own kvm_arch_alloc_vm implementation.
953 static inline struct kvm *kvm_arch_alloc_vm(void)
955 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
958 static inline void kvm_arch_free_vm(struct kvm *kvm)
964 #ifndef __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB
965 static inline int kvm_arch_flush_remote_tlb(struct kvm *kvm)
971 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
972 void kvm_arch_register_noncoherent_dma(struct kvm *kvm);
973 void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm);
974 bool kvm_arch_has_noncoherent_dma(struct kvm *kvm);
976 static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm)
980 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm)
984 static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
989 #ifdef __KVM_HAVE_ARCH_ASSIGNED_DEVICE
990 void kvm_arch_start_assignment(struct kvm *kvm);
991 void kvm_arch_end_assignment(struct kvm *kvm);
992 bool kvm_arch_has_assigned_device(struct kvm *kvm);
994 static inline void kvm_arch_start_assignment(struct kvm *kvm)
998 static inline void kvm_arch_end_assignment(struct kvm *kvm)
1002 static inline bool kvm_arch_has_assigned_device(struct kvm *kvm)
1008 static inline struct rcuwait *kvm_arch_vcpu_get_wait(struct kvm_vcpu *vcpu)
1010 #ifdef __KVM_HAVE_ARCH_WQP
1011 return vcpu->arch.waitp;
1017 #ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
1019 * returns true if the virtual interrupt controller is initialized and
1020 * ready to accept virtual IRQ. On some architectures the virtual interrupt
1021 * controller is dynamically instantiated and this is not always true.
1023 bool kvm_arch_intc_initialized(struct kvm *kvm);
1025 static inline bool kvm_arch_intc_initialized(struct kvm *kvm)
1031 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
1032 void kvm_arch_destroy_vm(struct kvm *kvm);
1033 void kvm_arch_sync_events(struct kvm *kvm);
1035 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
1037 bool kvm_is_reserved_pfn(kvm_pfn_t pfn);
1038 bool kvm_is_zone_device_pfn(kvm_pfn_t pfn);
1039 bool kvm_is_transparent_hugepage(kvm_pfn_t pfn);
1041 struct kvm_irq_ack_notifier {
1042 struct hlist_node link;
1044 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
1047 int kvm_irq_map_gsi(struct kvm *kvm,
1048 struct kvm_kernel_irq_routing_entry *entries, int gsi);
1049 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin);
1051 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
1053 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
1054 int irq_source_id, int level, bool line_status);
1055 int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
1056 struct kvm *kvm, int irq_source_id,
1057 int level, bool line_status);
1058 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
1059 void kvm_notify_acked_gsi(struct kvm *kvm, int gsi);
1060 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
1061 void kvm_register_irq_ack_notifier(struct kvm *kvm,
1062 struct kvm_irq_ack_notifier *kian);
1063 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
1064 struct kvm_irq_ack_notifier *kian);
1065 int kvm_request_irq_source_id(struct kvm *kvm);
1066 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
1067 bool kvm_arch_irqfd_allowed(struct kvm *kvm, struct kvm_irqfd *args);
1070 * search_memslots() and __gfn_to_memslot() are here because they are
1071 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
1072 * gfn_to_memslot() itself isn't here as an inline because that would
1073 * bloat other code too much.
1075 * IMPORTANT: Slots are sorted from highest GFN to lowest GFN!
1077 static inline struct kvm_memory_slot *
1078 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
1080 int start = 0, end = slots->used_slots;
1081 int slot = atomic_read(&slots->lru_slot);
1082 struct kvm_memory_slot *memslots = slots->memslots;
1084 if (unlikely(!slots->used_slots))
1087 if (gfn >= memslots[slot].base_gfn &&
1088 gfn < memslots[slot].base_gfn + memslots[slot].npages)
1089 return &memslots[slot];
1091 while (start < end) {
1092 slot = start + (end - start) / 2;
1094 if (gfn >= memslots[slot].base_gfn)
1100 if (start < slots->used_slots && gfn >= memslots[start].base_gfn &&
1101 gfn < memslots[start].base_gfn + memslots[start].npages) {
1102 atomic_set(&slots->lru_slot, start);
1103 return &memslots[start];
1109 static inline struct kvm_memory_slot *
1110 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
1112 return search_memslots(slots, gfn);
1115 static inline unsigned long
1116 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
1118 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
1121 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
1123 return gfn_to_memslot(kvm, gfn)->id;
1127 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
1129 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
1131 return slot->base_gfn + gfn_offset;
1134 static inline gpa_t gfn_to_gpa(gfn_t gfn)
1136 return (gpa_t)gfn << PAGE_SHIFT;
1139 static inline gfn_t gpa_to_gfn(gpa_t gpa)
1141 return (gfn_t)(gpa >> PAGE_SHIFT);
1144 static inline hpa_t pfn_to_hpa(kvm_pfn_t pfn)
1146 return (hpa_t)pfn << PAGE_SHIFT;
1149 static inline struct page *kvm_vcpu_gpa_to_page(struct kvm_vcpu *vcpu,
1152 return kvm_vcpu_gfn_to_page(vcpu, gpa_to_gfn(gpa));
1155 static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa)
1157 unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
1159 return kvm_is_error_hva(hva);
1162 enum kvm_stat_kind {
1167 struct kvm_stat_data {
1169 struct kvm_stats_debugfs_item *dbgfs_item;
1172 struct kvm_stats_debugfs_item {
1175 enum kvm_stat_kind kind;
1179 #define KVM_DBGFS_GET_MODE(dbgfs_item) \
1180 ((dbgfs_item)->mode ? (dbgfs_item)->mode : 0644)
1182 #define VM_STAT(n, x, ...) \
1183 { n, offsetof(struct kvm, stat.x), KVM_STAT_VM, ## __VA_ARGS__ }
1184 #define VCPU_STAT(n, x, ...) \
1185 { n, offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU, ## __VA_ARGS__ }
1187 extern struct kvm_stats_debugfs_item debugfs_entries[];
1188 extern struct dentry *kvm_debugfs_dir;
1190 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
1191 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
1193 if (unlikely(kvm->mmu_notifier_count))
1196 * Ensure the read of mmu_notifier_count happens before the read
1197 * of mmu_notifier_seq. This interacts with the smp_wmb() in
1198 * mmu_notifier_invalidate_range_end to make sure that the caller
1199 * either sees the old (non-zero) value of mmu_notifier_count or
1200 * the new (incremented) value of mmu_notifier_seq.
1201 * PowerPC Book3s HV KVM calls this under a per-page lock
1202 * rather than under kvm->mmu_lock, for scalability, so
1203 * can't rely on kvm->mmu_lock to keep things ordered.
1206 if (kvm->mmu_notifier_seq != mmu_seq)
1212 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
1214 #define KVM_MAX_IRQ_ROUTES 4096 /* might need extension/rework in the future */
1216 bool kvm_arch_can_set_irq_routing(struct kvm *kvm);
1217 int kvm_set_irq_routing(struct kvm *kvm,
1218 const struct kvm_irq_routing_entry *entries,
1221 int kvm_set_routing_entry(struct kvm *kvm,
1222 struct kvm_kernel_irq_routing_entry *e,
1223 const struct kvm_irq_routing_entry *ue);
1224 void kvm_free_irq_routing(struct kvm *kvm);
1228 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
1232 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
1234 #ifdef CONFIG_HAVE_KVM_EVENTFD
1236 void kvm_eventfd_init(struct kvm *kvm);
1237 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
1239 #ifdef CONFIG_HAVE_KVM_IRQFD
1240 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
1241 void kvm_irqfd_release(struct kvm *kvm);
1242 void kvm_irq_routing_update(struct kvm *);
1244 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1249 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1254 static inline void kvm_eventfd_init(struct kvm *kvm) {}
1256 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1261 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1263 #ifdef CONFIG_HAVE_KVM_IRQCHIP
1264 static inline void kvm_irq_routing_update(struct kvm *kvm)
1269 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
1274 #endif /* CONFIG_HAVE_KVM_EVENTFD */
1276 void kvm_arch_irq_routing_update(struct kvm *kvm);
1278 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1281 * Ensure the rest of the request is published to kvm_check_request's
1282 * caller. Paired with the smp_mb__after_atomic in kvm_check_request.
1285 set_bit(req & KVM_REQUEST_MASK, (void *)&vcpu->requests);
1288 static inline bool kvm_request_pending(struct kvm_vcpu *vcpu)
1290 return READ_ONCE(vcpu->requests);
1293 static inline bool kvm_test_request(int req, struct kvm_vcpu *vcpu)
1295 return test_bit(req & KVM_REQUEST_MASK, (void *)&vcpu->requests);
1298 static inline void kvm_clear_request(int req, struct kvm_vcpu *vcpu)
1300 clear_bit(req & KVM_REQUEST_MASK, (void *)&vcpu->requests);
1303 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1305 if (kvm_test_request(req, vcpu)) {
1306 kvm_clear_request(req, vcpu);
1309 * Ensure the rest of the request is visible to kvm_check_request's
1310 * caller. Paired with the smp_wmb in kvm_make_request.
1312 smp_mb__after_atomic();
1319 extern bool kvm_rebooting;
1321 extern unsigned int halt_poll_ns;
1322 extern unsigned int halt_poll_ns_grow;
1323 extern unsigned int halt_poll_ns_grow_start;
1324 extern unsigned int halt_poll_ns_shrink;
1327 const struct kvm_device_ops *ops;
1330 struct list_head vm_node;
1333 /* create, destroy, and name are mandatory */
1334 struct kvm_device_ops {
1338 * create is called holding kvm->lock and any operations not suitable
1339 * to do while holding the lock should be deferred to init (see
1342 int (*create)(struct kvm_device *dev, u32 type);
1345 * init is called after create if create is successful and is called
1346 * outside of holding kvm->lock.
1348 void (*init)(struct kvm_device *dev);
1351 * Destroy is responsible for freeing dev.
1353 * Destroy may be called before or after destructors are called
1354 * on emulated I/O regions, depending on whether a reference is
1355 * held by a vcpu or other kvm component that gets destroyed
1356 * after the emulated I/O.
1358 void (*destroy)(struct kvm_device *dev);
1361 * Release is an alternative method to free the device. It is
1362 * called when the device file descriptor is closed. Once
1363 * release is called, the destroy method will not be called
1364 * anymore as the device is removed from the device list of
1365 * the VM. kvm->lock is held.
1367 void (*release)(struct kvm_device *dev);
1369 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1370 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1371 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1372 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1374 int (*mmap)(struct kvm_device *dev, struct vm_area_struct *vma);
1377 void kvm_device_get(struct kvm_device *dev);
1378 void kvm_device_put(struct kvm_device *dev);
1379 struct kvm_device *kvm_device_from_filp(struct file *filp);
1380 int kvm_register_device_ops(const struct kvm_device_ops *ops, u32 type);
1381 void kvm_unregister_device_ops(u32 type);
1383 extern struct kvm_device_ops kvm_mpic_ops;
1384 extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
1385 extern struct kvm_device_ops kvm_arm_vgic_v3_ops;
1387 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1389 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1391 vcpu->spin_loop.in_spin_loop = val;
1393 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1395 vcpu->spin_loop.dy_eligible = val;
1398 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1400 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1404 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1407 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1409 static inline bool kvm_is_visible_memslot(struct kvm_memory_slot *memslot)
1411 return (memslot && memslot->id < KVM_USER_MEM_SLOTS &&
1412 !(memslot->flags & KVM_MEMSLOT_INVALID));
1415 struct kvm_vcpu *kvm_get_running_vcpu(void);
1416 struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void);
1418 #ifdef CONFIG_HAVE_KVM_IRQ_BYPASS
1419 bool kvm_arch_has_irq_bypass(void);
1420 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *,
1421 struct irq_bypass_producer *);
1422 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *,
1423 struct irq_bypass_producer *);
1424 void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *);
1425 void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *);
1426 int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq,
1427 uint32_t guest_irq, bool set);
1428 #endif /* CONFIG_HAVE_KVM_IRQ_BYPASS */
1430 #ifdef CONFIG_HAVE_KVM_INVALID_WAKEUPS
1431 /* If we wakeup during the poll time, was it a sucessful poll? */
1432 static inline bool vcpu_valid_wakeup(struct kvm_vcpu *vcpu)
1434 return vcpu->valid_wakeup;
1438 static inline bool vcpu_valid_wakeup(struct kvm_vcpu *vcpu)
1442 #endif /* CONFIG_HAVE_KVM_INVALID_WAKEUPS */
1444 #ifdef CONFIG_HAVE_KVM_NO_POLL
1445 /* Callback that tells if we must not poll */
1446 bool kvm_arch_no_poll(struct kvm_vcpu *vcpu);
1448 static inline bool kvm_arch_no_poll(struct kvm_vcpu *vcpu)
1452 #endif /* CONFIG_HAVE_KVM_NO_POLL */
1454 #ifdef CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL
1455 long kvm_arch_vcpu_async_ioctl(struct file *filp,
1456 unsigned int ioctl, unsigned long arg);
1458 static inline long kvm_arch_vcpu_async_ioctl(struct file *filp,
1462 return -ENOIOCTLCMD;
1464 #endif /* CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL */
1466 void kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm,
1467 unsigned long start, unsigned long end);
1469 #ifdef CONFIG_HAVE_KVM_VCPU_RUN_PID_CHANGE
1470 int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu);
1472 static inline int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu)
1476 #endif /* CONFIG_HAVE_KVM_VCPU_RUN_PID_CHANGE */
1478 typedef int (*kvm_vm_thread_fn_t)(struct kvm *kvm, uintptr_t data);
1480 int kvm_vm_create_worker_thread(struct kvm *kvm, kvm_vm_thread_fn_t thread_fn,
1481 uintptr_t data, const char *name,
1482 struct task_struct **thread_ptr);
1484 #ifdef CONFIG_KVM_XFER_TO_GUEST_WORK
1485 static inline void kvm_handle_signal_exit(struct kvm_vcpu *vcpu)
1487 vcpu->run->exit_reason = KVM_EXIT_INTR;
1488 vcpu->stat.signal_exits++;
1490 #endif /* CONFIG_KVM_XFER_TO_GUEST_WORK */
1493 * This defines how many reserved entries we want to keep before we
1494 * kick the vcpu to the userspace to avoid dirty ring full. This
1495 * value can be tuned to higher if e.g. PML is enabled on the host.
1497 #define KVM_DIRTY_RING_RSVD_ENTRIES 64
1499 /* Max number of entries allowed for each kvm dirty ring */
1500 #define KVM_DIRTY_RING_MAX_ENTRIES 65536