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>
38 #ifndef KVM_MAX_VCPU_ID
39 #define KVM_MAX_VCPU_ID KVM_MAX_VCPUS
43 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
44 * in kvm, other bits are visible for userspace which are defined in
45 * include/linux/kvm_h.
47 #define KVM_MEMSLOT_INVALID (1UL << 16)
50 * Bit 63 of the memslot generation number is an "update in-progress flag",
51 * e.g. is temporarily set for the duration of install_new_memslots().
52 * This flag effectively creates a unique generation number that is used to
53 * mark cached memslot data, e.g. MMIO accesses, as potentially being stale,
54 * i.e. may (or may not) have come from the previous memslots generation.
56 * This is necessary because the actual memslots update is not atomic with
57 * respect to the generation number update. Updating the generation number
58 * first would allow a vCPU to cache a spte from the old memslots using the
59 * new generation number, and updating the generation number after switching
60 * to the new memslots would allow cache hits using the old generation number
61 * to reference the defunct memslots.
63 * This mechanism is used to prevent getting hits in KVM's caches while a
64 * memslot update is in-progress, and to prevent cache hits *after* updating
65 * the actual generation number against accesses that were inserted into the
66 * cache *before* the memslots were updated.
68 #define KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS BIT_ULL(63)
70 /* Two fragments for cross MMIO pages. */
71 #define KVM_MAX_MMIO_FRAGMENTS 2
73 #ifndef KVM_ADDRESS_SPACE_NUM
74 #define KVM_ADDRESS_SPACE_NUM 1
78 * For the normal pfn, the highest 12 bits should be zero,
79 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
80 * mask bit 63 to indicate the noslot pfn.
82 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
83 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
84 #define KVM_PFN_NOSLOT (0x1ULL << 63)
86 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
87 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
88 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
91 * error pfns indicate that the gfn is in slot but faild to
92 * translate it to pfn on host.
94 static inline bool is_error_pfn(kvm_pfn_t pfn)
96 return !!(pfn & KVM_PFN_ERR_MASK);
100 * error_noslot pfns indicate that the gfn can not be
101 * translated to pfn - it is not in slot or failed to
102 * translate it to pfn.
104 static inline bool is_error_noslot_pfn(kvm_pfn_t pfn)
106 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
109 /* noslot pfn indicates that the gfn is not in slot. */
110 static inline bool is_noslot_pfn(kvm_pfn_t pfn)
112 return pfn == KVM_PFN_NOSLOT;
116 * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390)
117 * provide own defines and kvm_is_error_hva
119 #ifndef KVM_HVA_ERR_BAD
121 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
122 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
124 static inline bool kvm_is_error_hva(unsigned long addr)
126 return addr >= PAGE_OFFSET;
131 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
133 static inline bool is_error_page(struct page *page)
138 #define KVM_REQUEST_MASK GENMASK(7,0)
139 #define KVM_REQUEST_NO_WAKEUP BIT(8)
140 #define KVM_REQUEST_WAIT BIT(9)
142 * Architecture-independent vcpu->requests bit members
143 * Bits 4-7 are reserved for more arch-independent bits.
145 #define KVM_REQ_TLB_FLUSH (0 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
146 #define KVM_REQ_MMU_RELOAD (1 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
147 #define KVM_REQ_PENDING_TIMER 2
148 #define KVM_REQ_UNHALT 3
149 #define KVM_REQUEST_ARCH_BASE 8
151 #define KVM_ARCH_REQ_FLAGS(nr, flags) ({ \
152 BUILD_BUG_ON((unsigned)(nr) >= (sizeof_field(struct kvm_vcpu, requests) * 8) - KVM_REQUEST_ARCH_BASE); \
153 (unsigned)(((nr) + KVM_REQUEST_ARCH_BASE) | (flags)); \
155 #define KVM_ARCH_REQ(nr) KVM_ARCH_REQ_FLAGS(nr, 0)
157 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
158 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
160 extern struct mutex kvm_lock;
161 extern struct list_head vm_list;
163 struct kvm_io_range {
166 struct kvm_io_device *dev;
169 #define NR_IOBUS_DEVS 1000
174 struct kvm_io_range range[];
180 KVM_VIRTIO_CCW_NOTIFY_BUS,
185 int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
186 int len, const void *val);
187 int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx,
188 gpa_t addr, int len, const void *val, long cookie);
189 int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
191 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
192 int len, struct kvm_io_device *dev);
193 void kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
194 struct kvm_io_device *dev);
195 struct kvm_io_device *kvm_io_bus_get_dev(struct kvm *kvm, enum kvm_bus bus_idx,
198 #ifdef CONFIG_KVM_ASYNC_PF
199 struct kvm_async_pf {
200 struct work_struct work;
201 struct list_head link;
202 struct list_head queue;
203 struct kvm_vcpu *vcpu;
204 struct mm_struct *mm;
207 struct kvm_arch_async_pf arch;
209 bool notpresent_injected;
212 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
213 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
214 bool kvm_setup_async_pf(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
215 unsigned long hva, struct kvm_arch_async_pf *arch);
216 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
223 READING_SHADOW_PAGE_TABLES,
226 #define KVM_UNMAPPED_PAGE ((void *) 0x500 + POISON_POINTER_DELTA)
228 struct kvm_host_map {
230 * Only valid if the 'pfn' is managed by the host kernel (i.e. There is
231 * a 'struct page' for it. When using mem= kernel parameter some memory
232 * can be used as guest memory but they are not managed by host
234 * If 'pfn' is not managed by the host kernel, this field is
235 * initialized to KVM_UNMAPPED_PAGE.
244 * Used to check if the mapping is valid or not. Never use 'kvm_host_map'
245 * directly to check for that.
247 static inline bool kvm_vcpu_mapped(struct kvm_host_map *map)
253 * Sometimes a large or cross-page mmio needs to be broken up into separate
254 * exits for userspace servicing.
256 struct kvm_mmio_fragment {
264 #ifdef CONFIG_PREEMPT_NOTIFIERS
265 struct preempt_notifier preempt_notifier;
268 int vcpu_id; /* id given by userspace at creation */
269 int vcpu_idx; /* index in kvm->vcpus array */
273 unsigned long guest_debug;
276 struct list_head blocked_vcpu_list;
282 struct pid __rcu *pid;
285 struct kvm_vcpu_stat stat;
286 unsigned int halt_poll_ns;
289 #ifdef CONFIG_HAS_IOMEM
291 int mmio_read_completed;
293 int mmio_cur_fragment;
294 int mmio_nr_fragments;
295 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
298 #ifdef CONFIG_KVM_ASYNC_PF
301 struct list_head queue;
302 struct list_head done;
307 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
309 * Cpu relax intercept or pause loop exit optimization
310 * in_spin_loop: set when a vcpu does a pause loop exit
311 * or cpu relax intercepted.
312 * dy_eligible: indicates whether vcpu is eligible for directed yield.
321 struct kvm_vcpu_arch arch;
324 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
327 * The memory barrier ensures a previous write to vcpu->requests cannot
328 * be reordered with the read of vcpu->mode. It pairs with the general
329 * memory barrier following the write of vcpu->mode in VCPU RUN.
331 smp_mb__before_atomic();
332 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
336 * Some of the bitops functions do not support too long bitmaps.
337 * This number must be determined not to exceed such limits.
339 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
341 struct kvm_memory_slot {
343 unsigned long npages;
344 unsigned long *dirty_bitmap;
345 struct kvm_arch_memory_slot arch;
346 unsigned long userspace_addr;
351 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
353 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
356 static inline unsigned long *kvm_second_dirty_bitmap(struct kvm_memory_slot *memslot)
358 unsigned long len = kvm_dirty_bitmap_bytes(memslot);
360 return memslot->dirty_bitmap + len / sizeof(*memslot->dirty_bitmap);
363 #ifndef KVM_DIRTY_LOG_MANUAL_CAPS
364 #define KVM_DIRTY_LOG_MANUAL_CAPS KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE
367 struct kvm_s390_adapter_int {
380 struct kvm_kernel_irq_routing_entry {
383 int (*set)(struct kvm_kernel_irq_routing_entry *e,
384 struct kvm *kvm, int irq_source_id, int level,
398 struct kvm_s390_adapter_int adapter;
399 struct kvm_hv_sint hv_sint;
401 struct hlist_node link;
404 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
405 struct kvm_irq_routing_table {
406 int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS];
409 * Array indexed by gsi. Each entry contains list of irq chips
410 * the gsi is connected to.
412 struct hlist_head map[];
416 #ifndef KVM_PRIVATE_MEM_SLOTS
417 #define KVM_PRIVATE_MEM_SLOTS 0
420 #ifndef KVM_MEM_SLOTS_NUM
421 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
424 #ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
425 static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
433 * memslots are not sorted by id anymore, please use id_to_memslot()
434 * to get the memslot by its id.
436 struct kvm_memslots {
438 /* The mapping table from slot id to the index in memslots[]. */
439 short id_to_index[KVM_MEM_SLOTS_NUM];
442 struct kvm_memory_slot memslots[];
447 struct mutex slots_lock;
448 struct mm_struct *mm; /* userspace tied to this vm */
449 struct kvm_memslots __rcu *memslots[KVM_ADDRESS_SPACE_NUM];
450 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
453 * created_vcpus is protected by kvm->lock, and is incremented
454 * at the beginning of KVM_CREATE_VCPU. online_vcpus is only
455 * incremented after storing the kvm_vcpu pointer in vcpus,
456 * and is accessed atomically.
458 atomic_t online_vcpus;
460 int last_boosted_vcpu;
461 struct list_head vm_list;
463 struct kvm_io_bus __rcu *buses[KVM_NR_BUSES];
464 #ifdef CONFIG_HAVE_KVM_EVENTFD
467 struct list_head items;
468 struct list_head resampler_list;
469 struct mutex resampler_lock;
471 struct list_head ioeventfds;
473 struct kvm_vm_stat stat;
474 struct kvm_arch arch;
475 refcount_t users_count;
476 #ifdef CONFIG_KVM_MMIO
477 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
478 spinlock_t ring_lock;
479 struct list_head coalesced_zones;
482 struct mutex irq_lock;
483 #ifdef CONFIG_HAVE_KVM_IRQCHIP
485 * Update side is protected by irq_lock.
487 struct kvm_irq_routing_table __rcu *irq_routing;
489 #ifdef CONFIG_HAVE_KVM_IRQFD
490 struct hlist_head irq_ack_notifier_list;
493 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
494 struct mmu_notifier mmu_notifier;
495 unsigned long mmu_notifier_seq;
496 long mmu_notifier_count;
499 struct list_head devices;
500 u64 manual_dirty_log_protect;
501 struct dentry *debugfs_dentry;
502 struct kvm_stat_data **debugfs_stat_data;
503 struct srcu_struct srcu;
504 struct srcu_struct irq_srcu;
506 unsigned int max_halt_poll_ns;
509 #define kvm_err(fmt, ...) \
510 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
511 #define kvm_info(fmt, ...) \
512 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
513 #define kvm_debug(fmt, ...) \
514 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
515 #define kvm_debug_ratelimited(fmt, ...) \
516 pr_debug_ratelimited("kvm [%i]: " fmt, task_pid_nr(current), \
518 #define kvm_pr_unimpl(fmt, ...) \
519 pr_err_ratelimited("kvm [%i]: " fmt, \
520 task_tgid_nr(current), ## __VA_ARGS__)
522 /* The guest did something we don't support. */
523 #define vcpu_unimpl(vcpu, fmt, ...) \
524 kvm_pr_unimpl("vcpu%i, guest rIP: 0x%lx " fmt, \
525 (vcpu)->vcpu_id, kvm_rip_read(vcpu), ## __VA_ARGS__)
527 #define vcpu_debug(vcpu, fmt, ...) \
528 kvm_debug("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
529 #define vcpu_debug_ratelimited(vcpu, fmt, ...) \
530 kvm_debug_ratelimited("vcpu%i " fmt, (vcpu)->vcpu_id, \
532 #define vcpu_err(vcpu, fmt, ...) \
533 kvm_err("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
535 static inline bool kvm_dirty_log_manual_protect_and_init_set(struct kvm *kvm)
537 return !!(kvm->manual_dirty_log_protect & KVM_DIRTY_LOG_INITIALLY_SET);
540 static inline struct kvm_io_bus *kvm_get_bus(struct kvm *kvm, enum kvm_bus idx)
542 return srcu_dereference_check(kvm->buses[idx], &kvm->srcu,
543 lockdep_is_held(&kvm->slots_lock) ||
544 !refcount_read(&kvm->users_count));
547 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
549 int num_vcpus = atomic_read(&kvm->online_vcpus);
550 i = array_index_nospec(i, num_vcpus);
552 /* Pairs with smp_wmb() in kvm_vm_ioctl_create_vcpu. */
554 return kvm->vcpus[i];
557 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
559 idx < atomic_read(&kvm->online_vcpus) && \
560 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
563 static inline struct kvm_vcpu *kvm_get_vcpu_by_id(struct kvm *kvm, int id)
565 struct kvm_vcpu *vcpu = NULL;
570 if (id < KVM_MAX_VCPUS)
571 vcpu = kvm_get_vcpu(kvm, id);
572 if (vcpu && vcpu->vcpu_id == id)
574 kvm_for_each_vcpu(i, vcpu, kvm)
575 if (vcpu->vcpu_id == id)
580 static inline int kvm_vcpu_get_idx(struct kvm_vcpu *vcpu)
582 return vcpu->vcpu_idx;
585 #define kvm_for_each_memslot(memslot, slots) \
586 for (memslot = &slots->memslots[0]; \
587 memslot < slots->memslots + slots->used_slots; memslot++) \
588 if (WARN_ON_ONCE(!memslot->npages)) { \
591 void kvm_vcpu_destroy(struct kvm_vcpu *vcpu);
593 void vcpu_load(struct kvm_vcpu *vcpu);
594 void vcpu_put(struct kvm_vcpu *vcpu);
596 #ifdef __KVM_HAVE_IOAPIC
597 void kvm_arch_post_irq_ack_notifier_list_update(struct kvm *kvm);
598 void kvm_arch_post_irq_routing_update(struct kvm *kvm);
600 static inline void kvm_arch_post_irq_ack_notifier_list_update(struct kvm *kvm)
603 static inline void kvm_arch_post_irq_routing_update(struct kvm *kvm)
608 #ifdef CONFIG_HAVE_KVM_IRQFD
609 int kvm_irqfd_init(void);
610 void kvm_irqfd_exit(void);
612 static inline int kvm_irqfd_init(void)
617 static inline void kvm_irqfd_exit(void)
621 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
622 struct module *module);
625 void kvm_get_kvm(struct kvm *kvm);
626 void kvm_put_kvm(struct kvm *kvm);
627 void kvm_put_kvm_no_destroy(struct kvm *kvm);
629 static inline struct kvm_memslots *__kvm_memslots(struct kvm *kvm, int as_id)
631 as_id = array_index_nospec(as_id, KVM_ADDRESS_SPACE_NUM);
632 return srcu_dereference_check(kvm->memslots[as_id], &kvm->srcu,
633 lockdep_is_held(&kvm->slots_lock) ||
634 !refcount_read(&kvm->users_count));
637 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
639 return __kvm_memslots(kvm, 0);
642 static inline struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu)
644 int as_id = kvm_arch_vcpu_memslots_id(vcpu);
646 return __kvm_memslots(vcpu->kvm, as_id);
650 struct kvm_memory_slot *id_to_memslot(struct kvm_memslots *slots, int id)
652 int index = slots->id_to_index[id];
653 struct kvm_memory_slot *slot;
658 slot = &slots->memslots[index];
660 WARN_ON(slot->id != id);
665 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
666 * - create a new memory slot
667 * - delete an existing memory slot
668 * - modify an existing memory slot
669 * -- move it in the guest physical memory space
670 * -- just change its flags
672 * Since flags can be changed by some of these operations, the following
673 * differentiation is the best we can do for __kvm_set_memory_region():
682 int kvm_set_memory_region(struct kvm *kvm,
683 const struct kvm_userspace_memory_region *mem);
684 int __kvm_set_memory_region(struct kvm *kvm,
685 const struct kvm_userspace_memory_region *mem);
686 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot);
687 void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen);
688 int kvm_arch_prepare_memory_region(struct kvm *kvm,
689 struct kvm_memory_slot *memslot,
690 const struct kvm_userspace_memory_region *mem,
691 enum kvm_mr_change change);
692 void kvm_arch_commit_memory_region(struct kvm *kvm,
693 const struct kvm_userspace_memory_region *mem,
694 struct kvm_memory_slot *old,
695 const struct kvm_memory_slot *new,
696 enum kvm_mr_change change);
697 /* flush all memory translations */
698 void kvm_arch_flush_shadow_all(struct kvm *kvm);
699 /* flush memory translations pointing to 'slot' */
700 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
701 struct kvm_memory_slot *slot);
703 int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn,
704 struct page **pages, int nr_pages);
706 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
707 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
708 unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable);
709 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
710 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn,
712 void kvm_release_page_clean(struct page *page);
713 void kvm_release_page_dirty(struct page *page);
714 void kvm_set_page_accessed(struct page *page);
716 kvm_pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
717 kvm_pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
719 kvm_pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
720 kvm_pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
721 kvm_pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn,
722 bool atomic, bool *async, bool write_fault,
725 void kvm_release_pfn_clean(kvm_pfn_t pfn);
726 void kvm_release_pfn_dirty(kvm_pfn_t pfn);
727 void kvm_set_pfn_dirty(kvm_pfn_t pfn);
728 void kvm_set_pfn_accessed(kvm_pfn_t pfn);
729 void kvm_get_pfn(kvm_pfn_t pfn);
731 void kvm_release_pfn(kvm_pfn_t pfn, bool dirty, struct gfn_to_pfn_cache *cache);
732 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
734 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
735 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
736 void *data, unsigned long len);
737 int kvm_read_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
738 void *data, unsigned int offset,
740 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
741 int offset, int len);
742 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
744 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
745 void *data, unsigned long len);
746 int kvm_write_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
747 void *data, unsigned int offset,
749 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
750 gpa_t gpa, unsigned long len);
752 #define __kvm_put_guest(kvm, gfn, offset, value, type) \
754 unsigned long __addr = gfn_to_hva(kvm, gfn); \
755 type __user *__uaddr = (type __user *)(__addr + offset); \
756 int __ret = -EFAULT; \
758 if (!kvm_is_error_hva(__addr)) \
759 __ret = put_user(value, __uaddr); \
761 mark_page_dirty(kvm, gfn); \
765 #define kvm_put_guest(kvm, gpa, value, type) \
768 struct kvm *__kvm = kvm; \
769 __kvm_put_guest(__kvm, __gpa >> PAGE_SHIFT, \
770 offset_in_page(__gpa), (value), type); \
773 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
774 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
775 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
776 bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
777 bool kvm_vcpu_is_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn);
778 unsigned long kvm_host_page_size(struct kvm_vcpu *vcpu, gfn_t gfn);
779 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
781 struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu);
782 struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn);
783 kvm_pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn);
784 kvm_pfn_t kvm_vcpu_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
785 int kvm_vcpu_map(struct kvm_vcpu *vcpu, gpa_t gpa, struct kvm_host_map *map);
786 int kvm_map_gfn(struct kvm_vcpu *vcpu, gfn_t gfn, struct kvm_host_map *map,
787 struct gfn_to_pfn_cache *cache, bool atomic);
788 struct page *kvm_vcpu_gfn_to_page(struct kvm_vcpu *vcpu, gfn_t gfn);
789 void kvm_vcpu_unmap(struct kvm_vcpu *vcpu, struct kvm_host_map *map, bool dirty);
790 int kvm_unmap_gfn(struct kvm_vcpu *vcpu, struct kvm_host_map *map,
791 struct gfn_to_pfn_cache *cache, bool dirty, bool atomic);
792 unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn);
793 unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu *vcpu, gfn_t gfn, bool *writable);
794 int kvm_vcpu_read_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, void *data, int offset,
796 int kvm_vcpu_read_guest_atomic(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
798 int kvm_vcpu_read_guest(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
800 int kvm_vcpu_write_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, const void *data,
801 int offset, int len);
802 int kvm_vcpu_write_guest(struct kvm_vcpu *vcpu, gpa_t gpa, const void *data,
804 void kvm_vcpu_mark_page_dirty(struct kvm_vcpu *vcpu, gfn_t gfn);
806 void kvm_sigset_activate(struct kvm_vcpu *vcpu);
807 void kvm_sigset_deactivate(struct kvm_vcpu *vcpu);
809 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
810 void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu);
811 void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu);
812 bool kvm_vcpu_wake_up(struct kvm_vcpu *vcpu);
813 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
814 int kvm_vcpu_yield_to(struct kvm_vcpu *target);
815 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu, bool usermode_vcpu_not_eligible);
817 void kvm_flush_remote_tlbs(struct kvm *kvm);
818 void kvm_reload_remote_mmus(struct kvm *kvm);
820 #ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE
821 int kvm_mmu_topup_memory_cache(struct kvm_mmu_memory_cache *mc, int min);
822 int kvm_mmu_memory_cache_nr_free_objects(struct kvm_mmu_memory_cache *mc);
823 void kvm_mmu_free_memory_cache(struct kvm_mmu_memory_cache *mc);
824 void *kvm_mmu_memory_cache_alloc(struct kvm_mmu_memory_cache *mc);
827 bool kvm_make_vcpus_request_mask(struct kvm *kvm, unsigned int req,
828 struct kvm_vcpu *except,
829 unsigned long *vcpu_bitmap, cpumask_var_t tmp);
830 bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);
831 bool kvm_make_all_cpus_request_except(struct kvm *kvm, unsigned int req,
832 struct kvm_vcpu *except);
833 bool kvm_make_cpus_request_mask(struct kvm *kvm, unsigned int req,
834 unsigned long *vcpu_bitmap);
836 long kvm_arch_dev_ioctl(struct file *filp,
837 unsigned int ioctl, unsigned long arg);
838 long kvm_arch_vcpu_ioctl(struct file *filp,
839 unsigned int ioctl, unsigned long arg);
840 vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
842 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext);
844 void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
845 struct kvm_memory_slot *slot,
848 void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot);
850 #ifdef CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT
851 void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm,
852 struct kvm_memory_slot *memslot);
853 #else /* !CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT */
854 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log);
855 int kvm_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log,
856 int *is_dirty, struct kvm_memory_slot **memslot);
859 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
861 int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
862 struct kvm_enable_cap *cap);
863 long kvm_arch_vm_ioctl(struct file *filp,
864 unsigned int ioctl, unsigned long arg);
866 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
867 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
869 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
870 struct kvm_translation *tr);
872 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
873 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
874 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
875 struct kvm_sregs *sregs);
876 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
877 struct kvm_sregs *sregs);
878 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
879 struct kvm_mp_state *mp_state);
880 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
881 struct kvm_mp_state *mp_state);
882 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
883 struct kvm_guest_debug *dbg);
884 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu);
886 int kvm_arch_init(void *opaque);
887 void kvm_arch_exit(void);
889 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);
891 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
892 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
893 int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id);
894 int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu);
895 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
896 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
898 #ifdef __KVM_HAVE_ARCH_VCPU_DEBUGFS
899 void kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry);
902 int kvm_arch_hardware_enable(void);
903 void kvm_arch_hardware_disable(void);
904 int kvm_arch_hardware_setup(void *opaque);
905 void kvm_arch_hardware_unsetup(void);
906 int kvm_arch_check_processor_compat(void *opaque);
907 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
908 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu);
909 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
910 bool kvm_arch_dy_runnable(struct kvm_vcpu *vcpu);
911 int kvm_arch_post_init_vm(struct kvm *kvm);
912 void kvm_arch_pre_destroy_vm(struct kvm *kvm);
914 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
916 * All architectures that want to use vzalloc currently also
917 * need their own kvm_arch_alloc_vm implementation.
919 static inline struct kvm *kvm_arch_alloc_vm(void)
921 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
924 static inline void kvm_arch_free_vm(struct kvm *kvm)
930 #ifndef __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB
931 static inline int kvm_arch_flush_remote_tlb(struct kvm *kvm)
937 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
938 void kvm_arch_register_noncoherent_dma(struct kvm *kvm);
939 void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm);
940 bool kvm_arch_has_noncoherent_dma(struct kvm *kvm);
942 static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm)
946 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm)
950 static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
955 #ifdef __KVM_HAVE_ARCH_ASSIGNED_DEVICE
956 void kvm_arch_start_assignment(struct kvm *kvm);
957 void kvm_arch_end_assignment(struct kvm *kvm);
958 bool kvm_arch_has_assigned_device(struct kvm *kvm);
960 static inline void kvm_arch_start_assignment(struct kvm *kvm)
964 static inline void kvm_arch_end_assignment(struct kvm *kvm)
968 static inline bool kvm_arch_has_assigned_device(struct kvm *kvm)
974 static inline struct rcuwait *kvm_arch_vcpu_get_wait(struct kvm_vcpu *vcpu)
976 #ifdef __KVM_HAVE_ARCH_WQP
977 return vcpu->arch.waitp;
983 #ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
985 * returns true if the virtual interrupt controller is initialized and
986 * ready to accept virtual IRQ. On some architectures the virtual interrupt
987 * controller is dynamically instantiated and this is not always true.
989 bool kvm_arch_intc_initialized(struct kvm *kvm);
991 static inline bool kvm_arch_intc_initialized(struct kvm *kvm)
997 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
998 void kvm_arch_destroy_vm(struct kvm *kvm);
999 void kvm_arch_sync_events(struct kvm *kvm);
1001 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
1003 bool kvm_is_reserved_pfn(kvm_pfn_t pfn);
1004 bool kvm_is_zone_device_pfn(kvm_pfn_t pfn);
1005 bool kvm_is_transparent_hugepage(kvm_pfn_t pfn);
1007 struct kvm_irq_ack_notifier {
1008 struct hlist_node link;
1010 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
1013 int kvm_irq_map_gsi(struct kvm *kvm,
1014 struct kvm_kernel_irq_routing_entry *entries, int gsi);
1015 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin);
1017 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
1019 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
1020 int irq_source_id, int level, bool line_status);
1021 int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
1022 struct kvm *kvm, int irq_source_id,
1023 int level, bool line_status);
1024 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
1025 void kvm_notify_acked_gsi(struct kvm *kvm, int gsi);
1026 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
1027 void kvm_register_irq_ack_notifier(struct kvm *kvm,
1028 struct kvm_irq_ack_notifier *kian);
1029 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
1030 struct kvm_irq_ack_notifier *kian);
1031 int kvm_request_irq_source_id(struct kvm *kvm);
1032 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
1033 bool kvm_arch_irqfd_allowed(struct kvm *kvm, struct kvm_irqfd *args);
1036 * search_memslots() and __gfn_to_memslot() are here because they are
1037 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
1038 * gfn_to_memslot() itself isn't here as an inline because that would
1039 * bloat other code too much.
1041 * IMPORTANT: Slots are sorted from highest GFN to lowest GFN!
1043 static inline struct kvm_memory_slot *
1044 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
1046 int start = 0, end = slots->used_slots;
1047 int slot = atomic_read(&slots->lru_slot);
1048 struct kvm_memory_slot *memslots = slots->memslots;
1050 if (unlikely(!slots->used_slots))
1053 if (gfn >= memslots[slot].base_gfn &&
1054 gfn < memslots[slot].base_gfn + memslots[slot].npages)
1055 return &memslots[slot];
1057 while (start < end) {
1058 slot = start + (end - start) / 2;
1060 if (gfn >= memslots[slot].base_gfn)
1066 if (start < slots->used_slots && gfn >= memslots[start].base_gfn &&
1067 gfn < memslots[start].base_gfn + memslots[start].npages) {
1068 atomic_set(&slots->lru_slot, start);
1069 return &memslots[start];
1075 static inline struct kvm_memory_slot *
1076 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
1078 return search_memslots(slots, gfn);
1081 static inline unsigned long
1082 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
1084 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
1087 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
1089 return gfn_to_memslot(kvm, gfn)->id;
1093 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
1095 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
1097 return slot->base_gfn + gfn_offset;
1100 static inline gpa_t gfn_to_gpa(gfn_t gfn)
1102 return (gpa_t)gfn << PAGE_SHIFT;
1105 static inline gfn_t gpa_to_gfn(gpa_t gpa)
1107 return (gfn_t)(gpa >> PAGE_SHIFT);
1110 static inline hpa_t pfn_to_hpa(kvm_pfn_t pfn)
1112 return (hpa_t)pfn << PAGE_SHIFT;
1115 static inline struct page *kvm_vcpu_gpa_to_page(struct kvm_vcpu *vcpu,
1118 return kvm_vcpu_gfn_to_page(vcpu, gpa_to_gfn(gpa));
1121 static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa)
1123 unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
1125 return kvm_is_error_hva(hva);
1128 enum kvm_stat_kind {
1133 struct kvm_stat_data {
1135 struct kvm_stats_debugfs_item *dbgfs_item;
1138 struct kvm_stats_debugfs_item {
1141 enum kvm_stat_kind kind;
1145 #define KVM_DBGFS_GET_MODE(dbgfs_item) \
1146 ((dbgfs_item)->mode ? (dbgfs_item)->mode : 0644)
1148 #define VM_STAT(n, x, ...) \
1149 { n, offsetof(struct kvm, stat.x), KVM_STAT_VM, ## __VA_ARGS__ }
1150 #define VCPU_STAT(n, x, ...) \
1151 { n, offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU, ## __VA_ARGS__ }
1153 extern struct kvm_stats_debugfs_item debugfs_entries[];
1154 extern struct dentry *kvm_debugfs_dir;
1156 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
1157 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
1159 if (unlikely(kvm->mmu_notifier_count))
1162 * Ensure the read of mmu_notifier_count happens before the read
1163 * of mmu_notifier_seq. This interacts with the smp_wmb() in
1164 * mmu_notifier_invalidate_range_end to make sure that the caller
1165 * either sees the old (non-zero) value of mmu_notifier_count or
1166 * the new (incremented) value of mmu_notifier_seq.
1167 * PowerPC Book3s HV KVM calls this under a per-page lock
1168 * rather than under kvm->mmu_lock, for scalability, so
1169 * can't rely on kvm->mmu_lock to keep things ordered.
1172 if (kvm->mmu_notifier_seq != mmu_seq)
1178 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
1180 #define KVM_MAX_IRQ_ROUTES 4096 /* might need extension/rework in the future */
1182 bool kvm_arch_can_set_irq_routing(struct kvm *kvm);
1183 int kvm_set_irq_routing(struct kvm *kvm,
1184 const struct kvm_irq_routing_entry *entries,
1187 int kvm_set_routing_entry(struct kvm *kvm,
1188 struct kvm_kernel_irq_routing_entry *e,
1189 const struct kvm_irq_routing_entry *ue);
1190 void kvm_free_irq_routing(struct kvm *kvm);
1194 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
1198 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
1200 #ifdef CONFIG_HAVE_KVM_EVENTFD
1202 void kvm_eventfd_init(struct kvm *kvm);
1203 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
1205 #ifdef CONFIG_HAVE_KVM_IRQFD
1206 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
1207 void kvm_irqfd_release(struct kvm *kvm);
1208 void kvm_irq_routing_update(struct kvm *);
1210 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1215 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1220 static inline void kvm_eventfd_init(struct kvm *kvm) {}
1222 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1227 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1229 #ifdef CONFIG_HAVE_KVM_IRQCHIP
1230 static inline void kvm_irq_routing_update(struct kvm *kvm)
1235 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
1240 #endif /* CONFIG_HAVE_KVM_EVENTFD */
1242 void kvm_arch_irq_routing_update(struct kvm *kvm);
1244 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1247 * Ensure the rest of the request is published to kvm_check_request's
1248 * caller. Paired with the smp_mb__after_atomic in kvm_check_request.
1251 set_bit(req & KVM_REQUEST_MASK, (void *)&vcpu->requests);
1254 static inline bool kvm_request_pending(struct kvm_vcpu *vcpu)
1256 return READ_ONCE(vcpu->requests);
1259 static inline bool kvm_test_request(int req, struct kvm_vcpu *vcpu)
1261 return test_bit(req & KVM_REQUEST_MASK, (void *)&vcpu->requests);
1264 static inline void kvm_clear_request(int req, struct kvm_vcpu *vcpu)
1266 clear_bit(req & KVM_REQUEST_MASK, (void *)&vcpu->requests);
1269 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1271 if (kvm_test_request(req, vcpu)) {
1272 kvm_clear_request(req, vcpu);
1275 * Ensure the rest of the request is visible to kvm_check_request's
1276 * caller. Paired with the smp_wmb in kvm_make_request.
1278 smp_mb__after_atomic();
1285 extern bool kvm_rebooting;
1287 extern unsigned int halt_poll_ns;
1288 extern unsigned int halt_poll_ns_grow;
1289 extern unsigned int halt_poll_ns_grow_start;
1290 extern unsigned int halt_poll_ns_shrink;
1293 const struct kvm_device_ops *ops;
1296 struct list_head vm_node;
1299 /* create, destroy, and name are mandatory */
1300 struct kvm_device_ops {
1304 * create is called holding kvm->lock and any operations not suitable
1305 * to do while holding the lock should be deferred to init (see
1308 int (*create)(struct kvm_device *dev, u32 type);
1311 * init is called after create if create is successful and is called
1312 * outside of holding kvm->lock.
1314 void (*init)(struct kvm_device *dev);
1317 * Destroy is responsible for freeing dev.
1319 * Destroy may be called before or after destructors are called
1320 * on emulated I/O regions, depending on whether a reference is
1321 * held by a vcpu or other kvm component that gets destroyed
1322 * after the emulated I/O.
1324 void (*destroy)(struct kvm_device *dev);
1327 * Release is an alternative method to free the device. It is
1328 * called when the device file descriptor is closed. Once
1329 * release is called, the destroy method will not be called
1330 * anymore as the device is removed from the device list of
1331 * the VM. kvm->lock is held.
1333 void (*release)(struct kvm_device *dev);
1335 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1336 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1337 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1338 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1340 int (*mmap)(struct kvm_device *dev, struct vm_area_struct *vma);
1343 void kvm_device_get(struct kvm_device *dev);
1344 void kvm_device_put(struct kvm_device *dev);
1345 struct kvm_device *kvm_device_from_filp(struct file *filp);
1346 int kvm_register_device_ops(const struct kvm_device_ops *ops, u32 type);
1347 void kvm_unregister_device_ops(u32 type);
1349 extern struct kvm_device_ops kvm_mpic_ops;
1350 extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
1351 extern struct kvm_device_ops kvm_arm_vgic_v3_ops;
1353 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1355 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1357 vcpu->spin_loop.in_spin_loop = val;
1359 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1361 vcpu->spin_loop.dy_eligible = val;
1364 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1366 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1370 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1373 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1375 static inline bool kvm_is_visible_memslot(struct kvm_memory_slot *memslot)
1377 return (memslot && memslot->id < KVM_USER_MEM_SLOTS &&
1378 !(memslot->flags & KVM_MEMSLOT_INVALID));
1381 struct kvm_vcpu *kvm_get_running_vcpu(void);
1382 struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void);
1384 #ifdef CONFIG_HAVE_KVM_IRQ_BYPASS
1385 bool kvm_arch_has_irq_bypass(void);
1386 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *,
1387 struct irq_bypass_producer *);
1388 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *,
1389 struct irq_bypass_producer *);
1390 void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *);
1391 void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *);
1392 int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq,
1393 uint32_t guest_irq, bool set);
1394 #endif /* CONFIG_HAVE_KVM_IRQ_BYPASS */
1396 #ifdef CONFIG_HAVE_KVM_INVALID_WAKEUPS
1397 /* If we wakeup during the poll time, was it a sucessful poll? */
1398 static inline bool vcpu_valid_wakeup(struct kvm_vcpu *vcpu)
1400 return vcpu->valid_wakeup;
1404 static inline bool vcpu_valid_wakeup(struct kvm_vcpu *vcpu)
1408 #endif /* CONFIG_HAVE_KVM_INVALID_WAKEUPS */
1410 #ifdef CONFIG_HAVE_KVM_NO_POLL
1411 /* Callback that tells if we must not poll */
1412 bool kvm_arch_no_poll(struct kvm_vcpu *vcpu);
1414 static inline bool kvm_arch_no_poll(struct kvm_vcpu *vcpu)
1418 #endif /* CONFIG_HAVE_KVM_NO_POLL */
1420 #ifdef CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL
1421 long kvm_arch_vcpu_async_ioctl(struct file *filp,
1422 unsigned int ioctl, unsigned long arg);
1424 static inline long kvm_arch_vcpu_async_ioctl(struct file *filp,
1428 return -ENOIOCTLCMD;
1430 #endif /* CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL */
1432 void kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm,
1433 unsigned long start, unsigned long end);
1435 #ifdef CONFIG_HAVE_KVM_VCPU_RUN_PID_CHANGE
1436 int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu);
1438 static inline int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu)
1442 #endif /* CONFIG_HAVE_KVM_VCPU_RUN_PID_CHANGE */
1444 typedef int (*kvm_vm_thread_fn_t)(struct kvm *kvm, uintptr_t data);
1446 int kvm_vm_create_worker_thread(struct kvm *kvm, kvm_vm_thread_fn_t thread_fn,
1447 uintptr_t data, const char *name,
1448 struct task_struct **thread_ptr);
1450 #ifdef CONFIG_KVM_XFER_TO_GUEST_WORK
1451 static inline void kvm_handle_signal_exit(struct kvm_vcpu *vcpu)
1453 vcpu->run->exit_reason = KVM_EXIT_INTR;
1454 vcpu->stat.signal_exits++;
1456 #endif /* CONFIG_KVM_XFER_TO_GUEST_WORK */