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/vmalloc.h>
23 #include <linux/rcupdate.h>
24 #include <linux/ratelimit.h>
25 #include <linux/err.h>
26 #include <linux/irqflags.h>
27 #include <linux/context_tracking.h>
28 #include <linux/irqbypass.h>
29 #include <linux/swait.h>
30 #include <linux/refcount.h>
31 #include <linux/nospec.h>
32 #include <asm/signal.h>
34 #include <linux/kvm.h>
35 #include <linux/kvm_para.h>
37 #include <linux/kvm_types.h>
39 #include <asm/kvm_host.h>
41 #ifndef KVM_MAX_VCPU_ID
42 #define KVM_MAX_VCPU_ID KVM_MAX_VCPUS
46 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
47 * in kvm, other bits are visible for userspace which are defined in
48 * include/linux/kvm_h.
50 #define KVM_MEMSLOT_INVALID (1UL << 16)
53 * Bit 63 of the memslot generation number is an "update in-progress flag",
54 * e.g. is temporarily set for the duration of install_new_memslots().
55 * This flag effectively creates a unique generation number that is used to
56 * mark cached memslot data, e.g. MMIO accesses, as potentially being stale,
57 * i.e. may (or may not) have come from the previous memslots generation.
59 * This is necessary because the actual memslots update is not atomic with
60 * respect to the generation number update. Updating the generation number
61 * first would allow a vCPU to cache a spte from the old memslots using the
62 * new generation number, and updating the generation number after switching
63 * to the new memslots would allow cache hits using the old generation number
64 * to reference the defunct memslots.
66 * This mechanism is used to prevent getting hits in KVM's caches while a
67 * memslot update is in-progress, and to prevent cache hits *after* updating
68 * the actual generation number against accesses that were inserted into the
69 * cache *before* the memslots were updated.
71 #define KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS BIT_ULL(63)
73 /* Two fragments for cross MMIO pages. */
74 #define KVM_MAX_MMIO_FRAGMENTS 2
76 #ifndef KVM_ADDRESS_SPACE_NUM
77 #define KVM_ADDRESS_SPACE_NUM 1
81 * For the normal pfn, the highest 12 bits should be zero,
82 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
83 * mask bit 63 to indicate the noslot pfn.
85 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
86 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
87 #define KVM_PFN_NOSLOT (0x1ULL << 63)
89 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
90 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
91 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
94 * error pfns indicate that the gfn is in slot but faild to
95 * translate it to pfn on host.
97 static inline bool is_error_pfn(kvm_pfn_t pfn)
99 return !!(pfn & KVM_PFN_ERR_MASK);
103 * error_noslot pfns indicate that the gfn can not be
104 * translated to pfn - it is not in slot or failed to
105 * translate it to pfn.
107 static inline bool is_error_noslot_pfn(kvm_pfn_t pfn)
109 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
112 /* noslot pfn indicates that the gfn is not in slot. */
113 static inline bool is_noslot_pfn(kvm_pfn_t pfn)
115 return pfn == KVM_PFN_NOSLOT;
119 * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390)
120 * provide own defines and kvm_is_error_hva
122 #ifndef KVM_HVA_ERR_BAD
124 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
125 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
127 static inline bool kvm_is_error_hva(unsigned long addr)
129 return addr >= PAGE_OFFSET;
134 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
136 static inline bool is_error_page(struct page *page)
141 #define KVM_REQUEST_MASK GENMASK(7,0)
142 #define KVM_REQUEST_NO_WAKEUP BIT(8)
143 #define KVM_REQUEST_WAIT BIT(9)
145 * Architecture-independent vcpu->requests bit members
146 * Bits 4-7 are reserved for more arch-independent bits.
148 #define KVM_REQ_TLB_FLUSH (0 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
149 #define KVM_REQ_MMU_RELOAD (1 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
150 #define KVM_REQ_PENDING_TIMER 2
151 #define KVM_REQ_UNHALT 3
152 #define KVM_REQUEST_ARCH_BASE 8
154 #define KVM_ARCH_REQ_FLAGS(nr, flags) ({ \
155 BUILD_BUG_ON((unsigned)(nr) >= (FIELD_SIZEOF(struct kvm_vcpu, requests) * 8) - KVM_REQUEST_ARCH_BASE); \
156 (unsigned)(((nr) + KVM_REQUEST_ARCH_BASE) | (flags)); \
158 #define KVM_ARCH_REQ(nr) KVM_ARCH_REQ_FLAGS(nr, 0)
160 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
161 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
163 extern struct kmem_cache *kvm_vcpu_cache;
165 extern spinlock_t kvm_lock;
166 extern struct list_head vm_list;
168 struct kvm_io_range {
171 struct kvm_io_device *dev;
174 #define NR_IOBUS_DEVS 1000
179 struct kvm_io_range range[];
185 KVM_VIRTIO_CCW_NOTIFY_BUS,
190 int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
191 int len, const void *val);
192 int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx,
193 gpa_t addr, int len, const void *val, long cookie);
194 int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
196 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
197 int len, struct kvm_io_device *dev);
198 void kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
199 struct kvm_io_device *dev);
200 struct kvm_io_device *kvm_io_bus_get_dev(struct kvm *kvm, enum kvm_bus bus_idx,
203 #ifdef CONFIG_KVM_ASYNC_PF
204 struct kvm_async_pf {
205 struct work_struct work;
206 struct list_head link;
207 struct list_head queue;
208 struct kvm_vcpu *vcpu;
209 struct mm_struct *mm;
212 struct kvm_arch_async_pf arch;
216 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
217 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
218 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva,
219 struct kvm_arch_async_pf *arch);
220 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
227 READING_SHADOW_PAGE_TABLES,
231 * Sometimes a large or cross-page mmio needs to be broken up into separate
232 * exits for userspace servicing.
234 struct kvm_mmio_fragment {
242 #ifdef CONFIG_PREEMPT_NOTIFIERS
243 struct preempt_notifier preempt_notifier;
250 unsigned long guest_debug;
253 struct list_head blocked_vcpu_list;
258 int guest_xcr0_loaded;
259 struct swait_queue_head wq;
260 struct pid __rcu *pid;
263 struct kvm_vcpu_stat stat;
264 unsigned int halt_poll_ns;
267 #ifdef CONFIG_HAS_IOMEM
269 int mmio_read_completed;
271 int mmio_cur_fragment;
272 int mmio_nr_fragments;
273 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
276 #ifdef CONFIG_KVM_ASYNC_PF
279 struct list_head queue;
280 struct list_head done;
285 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
287 * Cpu relax intercept or pause loop exit optimization
288 * in_spin_loop: set when a vcpu does a pause loop exit
289 * or cpu relax intercepted.
290 * dy_eligible: indicates whether vcpu is eligible for directed yield.
298 struct kvm_vcpu_arch arch;
299 struct dentry *debugfs_dentry;
302 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
305 * The memory barrier ensures a previous write to vcpu->requests cannot
306 * be reordered with the read of vcpu->mode. It pairs with the general
307 * memory barrier following the write of vcpu->mode in VCPU RUN.
309 smp_mb__before_atomic();
310 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
314 * Some of the bitops functions do not support too long bitmaps.
315 * This number must be determined not to exceed such limits.
317 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
319 struct kvm_memory_slot {
321 unsigned long npages;
322 unsigned long *dirty_bitmap;
323 struct kvm_arch_memory_slot arch;
324 unsigned long userspace_addr;
329 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
331 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
334 static inline unsigned long *kvm_second_dirty_bitmap(struct kvm_memory_slot *memslot)
336 unsigned long len = kvm_dirty_bitmap_bytes(memslot);
338 return memslot->dirty_bitmap + len / sizeof(*memslot->dirty_bitmap);
341 struct kvm_s390_adapter_int {
354 struct kvm_kernel_irq_routing_entry {
357 int (*set)(struct kvm_kernel_irq_routing_entry *e,
358 struct kvm *kvm, int irq_source_id, int level,
372 struct kvm_s390_adapter_int adapter;
373 struct kvm_hv_sint hv_sint;
375 struct hlist_node link;
378 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
379 struct kvm_irq_routing_table {
380 int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS];
383 * Array indexed by gsi. Each entry contains list of irq chips
384 * the gsi is connected to.
386 struct hlist_head map[0];
390 #ifndef KVM_PRIVATE_MEM_SLOTS
391 #define KVM_PRIVATE_MEM_SLOTS 0
394 #ifndef KVM_MEM_SLOTS_NUM
395 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
398 #ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
399 static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
407 * memslots are not sorted by id anymore, please use id_to_memslot()
408 * to get the memslot by its id.
410 struct kvm_memslots {
412 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
413 /* The mapping table from slot id to the index in memslots[]. */
414 short id_to_index[KVM_MEM_SLOTS_NUM];
421 struct mutex slots_lock;
422 struct mm_struct *mm; /* userspace tied to this vm */
423 struct kvm_memslots __rcu *memslots[KVM_ADDRESS_SPACE_NUM];
424 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
427 * created_vcpus is protected by kvm->lock, and is incremented
428 * at the beginning of KVM_CREATE_VCPU. online_vcpus is only
429 * incremented after storing the kvm_vcpu pointer in vcpus,
430 * and is accessed atomically.
432 atomic_t online_vcpus;
434 int last_boosted_vcpu;
435 struct list_head vm_list;
437 struct kvm_io_bus __rcu *buses[KVM_NR_BUSES];
438 #ifdef CONFIG_HAVE_KVM_EVENTFD
441 struct list_head items;
442 struct list_head resampler_list;
443 struct mutex resampler_lock;
445 struct list_head ioeventfds;
447 struct kvm_vm_stat stat;
448 struct kvm_arch arch;
449 refcount_t users_count;
450 #ifdef CONFIG_KVM_MMIO
451 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
452 spinlock_t ring_lock;
453 struct list_head coalesced_zones;
456 struct mutex irq_lock;
457 #ifdef CONFIG_HAVE_KVM_IRQCHIP
459 * Update side is protected by irq_lock.
461 struct kvm_irq_routing_table __rcu *irq_routing;
463 #ifdef CONFIG_HAVE_KVM_IRQFD
464 struct hlist_head irq_ack_notifier_list;
467 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
468 struct mmu_notifier mmu_notifier;
469 unsigned long mmu_notifier_seq;
470 long mmu_notifier_count;
473 struct list_head devices;
474 bool manual_dirty_log_protect;
475 struct dentry *debugfs_dentry;
476 struct kvm_stat_data **debugfs_stat_data;
477 struct srcu_struct srcu;
478 struct srcu_struct irq_srcu;
482 #define kvm_err(fmt, ...) \
483 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
484 #define kvm_info(fmt, ...) \
485 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
486 #define kvm_debug(fmt, ...) \
487 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
488 #define kvm_debug_ratelimited(fmt, ...) \
489 pr_debug_ratelimited("kvm [%i]: " fmt, task_pid_nr(current), \
491 #define kvm_pr_unimpl(fmt, ...) \
492 pr_err_ratelimited("kvm [%i]: " fmt, \
493 task_tgid_nr(current), ## __VA_ARGS__)
495 /* The guest did something we don't support. */
496 #define vcpu_unimpl(vcpu, fmt, ...) \
497 kvm_pr_unimpl("vcpu%i, guest rIP: 0x%lx " fmt, \
498 (vcpu)->vcpu_id, kvm_rip_read(vcpu), ## __VA_ARGS__)
500 #define vcpu_debug(vcpu, fmt, ...) \
501 kvm_debug("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
502 #define vcpu_debug_ratelimited(vcpu, fmt, ...) \
503 kvm_debug_ratelimited("vcpu%i " fmt, (vcpu)->vcpu_id, \
505 #define vcpu_err(vcpu, fmt, ...) \
506 kvm_err("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
508 static inline struct kvm_io_bus *kvm_get_bus(struct kvm *kvm, enum kvm_bus idx)
510 return srcu_dereference_check(kvm->buses[idx], &kvm->srcu,
511 lockdep_is_held(&kvm->slots_lock) ||
512 !refcount_read(&kvm->users_count));
515 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
517 int num_vcpus = atomic_read(&kvm->online_vcpus);
518 i = array_index_nospec(i, num_vcpus);
520 /* Pairs with smp_wmb() in kvm_vm_ioctl_create_vcpu. */
522 return kvm->vcpus[i];
525 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
527 idx < atomic_read(&kvm->online_vcpus) && \
528 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
531 static inline struct kvm_vcpu *kvm_get_vcpu_by_id(struct kvm *kvm, int id)
533 struct kvm_vcpu *vcpu = NULL;
538 if (id < KVM_MAX_VCPUS)
539 vcpu = kvm_get_vcpu(kvm, id);
540 if (vcpu && vcpu->vcpu_id == id)
542 kvm_for_each_vcpu(i, vcpu, kvm)
543 if (vcpu->vcpu_id == id)
548 static inline int kvm_vcpu_get_idx(struct kvm_vcpu *vcpu)
550 struct kvm_vcpu *tmp;
553 kvm_for_each_vcpu(idx, tmp, vcpu->kvm)
559 #define kvm_for_each_memslot(memslot, slots) \
560 for (memslot = &slots->memslots[0]; \
561 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
564 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
565 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
567 void vcpu_load(struct kvm_vcpu *vcpu);
568 void vcpu_put(struct kvm_vcpu *vcpu);
570 #ifdef __KVM_HAVE_IOAPIC
571 void kvm_arch_post_irq_ack_notifier_list_update(struct kvm *kvm);
572 void kvm_arch_post_irq_routing_update(struct kvm *kvm);
574 static inline void kvm_arch_post_irq_ack_notifier_list_update(struct kvm *kvm)
577 static inline void kvm_arch_post_irq_routing_update(struct kvm *kvm)
582 #ifdef CONFIG_HAVE_KVM_IRQFD
583 int kvm_irqfd_init(void);
584 void kvm_irqfd_exit(void);
586 static inline int kvm_irqfd_init(void)
591 static inline void kvm_irqfd_exit(void)
595 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
596 struct module *module);
599 void kvm_get_kvm(struct kvm *kvm);
600 void kvm_put_kvm(struct kvm *kvm);
602 static inline struct kvm_memslots *__kvm_memslots(struct kvm *kvm, int as_id)
604 as_id = array_index_nospec(as_id, KVM_ADDRESS_SPACE_NUM);
605 return srcu_dereference_check(kvm->memslots[as_id], &kvm->srcu,
606 lockdep_is_held(&kvm->slots_lock) ||
607 !refcount_read(&kvm->users_count));
610 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
612 return __kvm_memslots(kvm, 0);
615 static inline struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu)
617 int as_id = kvm_arch_vcpu_memslots_id(vcpu);
619 return __kvm_memslots(vcpu->kvm, as_id);
622 static inline struct kvm_memory_slot *
623 id_to_memslot(struct kvm_memslots *slots, int id)
625 int index = slots->id_to_index[id];
626 struct kvm_memory_slot *slot;
628 slot = &slots->memslots[index];
630 WARN_ON(slot->id != id);
635 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
636 * - create a new memory slot
637 * - delete an existing memory slot
638 * - modify an existing memory slot
639 * -- move it in the guest physical memory space
640 * -- just change its flags
642 * Since flags can be changed by some of these operations, the following
643 * differentiation is the best we can do for __kvm_set_memory_region():
652 int kvm_set_memory_region(struct kvm *kvm,
653 const struct kvm_userspace_memory_region *mem);
654 int __kvm_set_memory_region(struct kvm *kvm,
655 const struct kvm_userspace_memory_region *mem);
656 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
657 struct kvm_memory_slot *dont);
658 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
659 unsigned long npages);
660 void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen);
661 int kvm_arch_prepare_memory_region(struct kvm *kvm,
662 struct kvm_memory_slot *memslot,
663 const struct kvm_userspace_memory_region *mem,
664 enum kvm_mr_change change);
665 void kvm_arch_commit_memory_region(struct kvm *kvm,
666 const struct kvm_userspace_memory_region *mem,
667 const struct kvm_memory_slot *old,
668 const struct kvm_memory_slot *new,
669 enum kvm_mr_change change);
670 bool kvm_largepages_enabled(void);
671 void kvm_disable_largepages(void);
672 /* flush all memory translations */
673 void kvm_arch_flush_shadow_all(struct kvm *kvm);
674 /* flush memory translations pointing to 'slot' */
675 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
676 struct kvm_memory_slot *slot);
678 int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn,
679 struct page **pages, int nr_pages);
681 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
682 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
683 unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable);
684 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
685 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn,
687 void kvm_release_page_clean(struct page *page);
688 void kvm_release_page_dirty(struct page *page);
689 void kvm_set_page_accessed(struct page *page);
691 kvm_pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
692 kvm_pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
693 kvm_pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
695 kvm_pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
696 kvm_pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
697 kvm_pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn,
698 bool atomic, bool *async, bool write_fault,
701 void kvm_release_pfn_clean(kvm_pfn_t pfn);
702 void kvm_release_pfn_dirty(kvm_pfn_t pfn);
703 void kvm_set_pfn_dirty(kvm_pfn_t pfn);
704 void kvm_set_pfn_accessed(kvm_pfn_t pfn);
705 void kvm_get_pfn(kvm_pfn_t pfn);
707 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
709 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
711 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
712 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
713 void *data, unsigned long len);
714 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
715 int offset, int len);
716 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
718 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
719 void *data, unsigned long len);
720 int kvm_write_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
721 void *data, unsigned int offset,
723 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
724 gpa_t gpa, unsigned long len);
725 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
726 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
727 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
728 bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
729 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
730 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
732 struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu);
733 struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn);
734 kvm_pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn);
735 kvm_pfn_t kvm_vcpu_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
736 struct page *kvm_vcpu_gfn_to_page(struct kvm_vcpu *vcpu, gfn_t gfn);
737 unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn);
738 unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu *vcpu, gfn_t gfn, bool *writable);
739 int kvm_vcpu_read_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, void *data, int offset,
741 int kvm_vcpu_read_guest_atomic(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
743 int kvm_vcpu_read_guest(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
745 int kvm_vcpu_write_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, const void *data,
746 int offset, int len);
747 int kvm_vcpu_write_guest(struct kvm_vcpu *vcpu, gpa_t gpa, const void *data,
749 void kvm_vcpu_mark_page_dirty(struct kvm_vcpu *vcpu, gfn_t gfn);
751 void kvm_sigset_activate(struct kvm_vcpu *vcpu);
752 void kvm_sigset_deactivate(struct kvm_vcpu *vcpu);
754 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
755 void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu);
756 void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu);
757 bool kvm_vcpu_wake_up(struct kvm_vcpu *vcpu);
758 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
759 int kvm_vcpu_yield_to(struct kvm_vcpu *target);
760 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu, bool usermode_vcpu_not_eligible);
762 void kvm_flush_remote_tlbs(struct kvm *kvm);
763 void kvm_reload_remote_mmus(struct kvm *kvm);
765 bool kvm_make_vcpus_request_mask(struct kvm *kvm, unsigned int req,
766 unsigned long *vcpu_bitmap, cpumask_var_t tmp);
767 bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);
769 long kvm_arch_dev_ioctl(struct file *filp,
770 unsigned int ioctl, unsigned long arg);
771 long kvm_arch_vcpu_ioctl(struct file *filp,
772 unsigned int ioctl, unsigned long arg);
773 vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
775 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext);
777 int kvm_get_dirty_log(struct kvm *kvm,
778 struct kvm_dirty_log *log, int *is_dirty);
780 int kvm_get_dirty_log_protect(struct kvm *kvm,
781 struct kvm_dirty_log *log, bool *flush);
782 int kvm_clear_dirty_log_protect(struct kvm *kvm,
783 struct kvm_clear_dirty_log *log, bool *flush);
785 void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
786 struct kvm_memory_slot *slot,
790 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
791 struct kvm_dirty_log *log);
792 int kvm_vm_ioctl_clear_dirty_log(struct kvm *kvm,
793 struct kvm_clear_dirty_log *log);
795 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
797 int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
798 struct kvm_enable_cap *cap);
799 long kvm_arch_vm_ioctl(struct file *filp,
800 unsigned int ioctl, unsigned long arg);
802 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
803 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
805 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
806 struct kvm_translation *tr);
808 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
809 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
810 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
811 struct kvm_sregs *sregs);
812 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
813 struct kvm_sregs *sregs);
814 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
815 struct kvm_mp_state *mp_state);
816 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
817 struct kvm_mp_state *mp_state);
818 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
819 struct kvm_guest_debug *dbg);
820 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
822 int kvm_arch_init(void *opaque);
823 void kvm_arch_exit(void);
825 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
826 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
828 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);
830 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
831 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
832 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
833 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
834 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
835 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
836 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
838 bool kvm_arch_has_vcpu_debugfs(void);
839 int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu);
841 int kvm_arch_hardware_enable(void);
842 void kvm_arch_hardware_disable(void);
843 int kvm_arch_hardware_setup(void);
844 void kvm_arch_hardware_unsetup(void);
845 void kvm_arch_check_processor_compat(void *rtn);
846 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
847 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu);
848 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
850 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
852 * All architectures that want to use vzalloc currently also
853 * need their own kvm_arch_alloc_vm implementation.
855 static inline struct kvm *kvm_arch_alloc_vm(void)
857 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
860 static inline void kvm_arch_free_vm(struct kvm *kvm)
866 #ifndef __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB
867 static inline int kvm_arch_flush_remote_tlb(struct kvm *kvm)
873 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
874 void kvm_arch_register_noncoherent_dma(struct kvm *kvm);
875 void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm);
876 bool kvm_arch_has_noncoherent_dma(struct kvm *kvm);
878 static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm)
882 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm)
886 static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
891 #ifdef __KVM_HAVE_ARCH_ASSIGNED_DEVICE
892 void kvm_arch_start_assignment(struct kvm *kvm);
893 void kvm_arch_end_assignment(struct kvm *kvm);
894 bool kvm_arch_has_assigned_device(struct kvm *kvm);
896 static inline void kvm_arch_start_assignment(struct kvm *kvm)
900 static inline void kvm_arch_end_assignment(struct kvm *kvm)
904 static inline bool kvm_arch_has_assigned_device(struct kvm *kvm)
910 static inline struct swait_queue_head *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
912 #ifdef __KVM_HAVE_ARCH_WQP
913 return vcpu->arch.wqp;
919 #ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
921 * returns true if the virtual interrupt controller is initialized and
922 * ready to accept virtual IRQ. On some architectures the virtual interrupt
923 * controller is dynamically instantiated and this is not always true.
925 bool kvm_arch_intc_initialized(struct kvm *kvm);
927 static inline bool kvm_arch_intc_initialized(struct kvm *kvm)
933 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
934 void kvm_arch_destroy_vm(struct kvm *kvm);
935 void kvm_arch_sync_events(struct kvm *kvm);
937 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
938 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
940 bool kvm_is_reserved_pfn(kvm_pfn_t pfn);
942 struct kvm_irq_ack_notifier {
943 struct hlist_node link;
945 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
948 int kvm_irq_map_gsi(struct kvm *kvm,
949 struct kvm_kernel_irq_routing_entry *entries, int gsi);
950 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin);
952 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
954 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
955 int irq_source_id, int level, bool line_status);
956 int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
957 struct kvm *kvm, int irq_source_id,
958 int level, bool line_status);
959 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
960 void kvm_notify_acked_gsi(struct kvm *kvm, int gsi);
961 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
962 void kvm_register_irq_ack_notifier(struct kvm *kvm,
963 struct kvm_irq_ack_notifier *kian);
964 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
965 struct kvm_irq_ack_notifier *kian);
966 int kvm_request_irq_source_id(struct kvm *kvm);
967 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
970 * search_memslots() and __gfn_to_memslot() are here because they are
971 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
972 * gfn_to_memslot() itself isn't here as an inline because that would
973 * bloat other code too much.
975 static inline struct kvm_memory_slot *
976 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
978 int start = 0, end = slots->used_slots;
979 int slot = atomic_read(&slots->lru_slot);
980 struct kvm_memory_slot *memslots = slots->memslots;
982 if (gfn >= memslots[slot].base_gfn &&
983 gfn < memslots[slot].base_gfn + memslots[slot].npages)
984 return &memslots[slot];
986 while (start < end) {
987 slot = start + (end - start) / 2;
989 if (gfn >= memslots[slot].base_gfn)
995 if (gfn >= memslots[start].base_gfn &&
996 gfn < memslots[start].base_gfn + memslots[start].npages) {
997 atomic_set(&slots->lru_slot, start);
998 return &memslots[start];
1004 static inline struct kvm_memory_slot *
1005 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
1007 return search_memslots(slots, gfn);
1010 static inline unsigned long
1011 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
1013 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
1016 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
1018 return gfn_to_memslot(kvm, gfn)->id;
1022 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
1024 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
1026 return slot->base_gfn + gfn_offset;
1029 static inline gpa_t gfn_to_gpa(gfn_t gfn)
1031 return (gpa_t)gfn << PAGE_SHIFT;
1034 static inline gfn_t gpa_to_gfn(gpa_t gpa)
1036 return (gfn_t)(gpa >> PAGE_SHIFT);
1039 static inline hpa_t pfn_to_hpa(kvm_pfn_t pfn)
1041 return (hpa_t)pfn << PAGE_SHIFT;
1044 static inline struct page *kvm_vcpu_gpa_to_page(struct kvm_vcpu *vcpu,
1047 return kvm_vcpu_gfn_to_page(vcpu, gpa_to_gfn(gpa));
1050 static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa)
1052 unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
1054 return kvm_is_error_hva(hva);
1057 enum kvm_stat_kind {
1062 struct kvm_stat_data {
1067 struct kvm_stats_debugfs_item {
1070 enum kvm_stat_kind kind;
1072 extern struct kvm_stats_debugfs_item debugfs_entries[];
1073 extern struct dentry *kvm_debugfs_dir;
1075 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
1076 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
1078 if (unlikely(kvm->mmu_notifier_count))
1081 * Ensure the read of mmu_notifier_count happens before the read
1082 * of mmu_notifier_seq. This interacts with the smp_wmb() in
1083 * mmu_notifier_invalidate_range_end to make sure that the caller
1084 * either sees the old (non-zero) value of mmu_notifier_count or
1085 * the new (incremented) value of mmu_notifier_seq.
1086 * PowerPC Book3s HV KVM calls this under a per-page lock
1087 * rather than under kvm->mmu_lock, for scalability, so
1088 * can't rely on kvm->mmu_lock to keep things ordered.
1091 if (kvm->mmu_notifier_seq != mmu_seq)
1097 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
1099 #define KVM_MAX_IRQ_ROUTES 4096 /* might need extension/rework in the future */
1101 bool kvm_arch_can_set_irq_routing(struct kvm *kvm);
1102 int kvm_set_irq_routing(struct kvm *kvm,
1103 const struct kvm_irq_routing_entry *entries,
1106 int kvm_set_routing_entry(struct kvm *kvm,
1107 struct kvm_kernel_irq_routing_entry *e,
1108 const struct kvm_irq_routing_entry *ue);
1109 void kvm_free_irq_routing(struct kvm *kvm);
1113 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
1117 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
1119 #ifdef CONFIG_HAVE_KVM_EVENTFD
1121 void kvm_eventfd_init(struct kvm *kvm);
1122 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
1124 #ifdef CONFIG_HAVE_KVM_IRQFD
1125 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
1126 void kvm_irqfd_release(struct kvm *kvm);
1127 void kvm_irq_routing_update(struct kvm *);
1129 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1134 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1139 static inline void kvm_eventfd_init(struct kvm *kvm) {}
1141 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1146 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1148 #ifdef CONFIG_HAVE_KVM_IRQCHIP
1149 static inline void kvm_irq_routing_update(struct kvm *kvm)
1154 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
1159 #endif /* CONFIG_HAVE_KVM_EVENTFD */
1161 void kvm_arch_irq_routing_update(struct kvm *kvm);
1163 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1166 * Ensure the rest of the request is published to kvm_check_request's
1167 * caller. Paired with the smp_mb__after_atomic in kvm_check_request.
1170 set_bit(req & KVM_REQUEST_MASK, (void *)&vcpu->requests);
1173 static inline bool kvm_request_pending(struct kvm_vcpu *vcpu)
1175 return READ_ONCE(vcpu->requests);
1178 static inline bool kvm_test_request(int req, struct kvm_vcpu *vcpu)
1180 return test_bit(req & KVM_REQUEST_MASK, (void *)&vcpu->requests);
1183 static inline void kvm_clear_request(int req, struct kvm_vcpu *vcpu)
1185 clear_bit(req & KVM_REQUEST_MASK, (void *)&vcpu->requests);
1188 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1190 if (kvm_test_request(req, vcpu)) {
1191 kvm_clear_request(req, vcpu);
1194 * Ensure the rest of the request is visible to kvm_check_request's
1195 * caller. Paired with the smp_wmb in kvm_make_request.
1197 smp_mb__after_atomic();
1204 extern bool kvm_rebooting;
1206 extern unsigned int halt_poll_ns;
1207 extern unsigned int halt_poll_ns_grow;
1208 extern unsigned int halt_poll_ns_grow_start;
1209 extern unsigned int halt_poll_ns_shrink;
1212 struct kvm_device_ops *ops;
1215 struct list_head vm_node;
1218 /* create, destroy, and name are mandatory */
1219 struct kvm_device_ops {
1223 * create is called holding kvm->lock and any operations not suitable
1224 * to do while holding the lock should be deferred to init (see
1227 int (*create)(struct kvm_device *dev, u32 type);
1230 * init is called after create if create is successful and is called
1231 * outside of holding kvm->lock.
1233 void (*init)(struct kvm_device *dev);
1236 * Destroy is responsible for freeing dev.
1238 * Destroy may be called before or after destructors are called
1239 * on emulated I/O regions, depending on whether a reference is
1240 * held by a vcpu or other kvm component that gets destroyed
1241 * after the emulated I/O.
1243 void (*destroy)(struct kvm_device *dev);
1245 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1246 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1247 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1248 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1252 void kvm_device_get(struct kvm_device *dev);
1253 void kvm_device_put(struct kvm_device *dev);
1254 struct kvm_device *kvm_device_from_filp(struct file *filp);
1255 int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type);
1256 void kvm_unregister_device_ops(u32 type);
1258 extern struct kvm_device_ops kvm_mpic_ops;
1259 extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
1260 extern struct kvm_device_ops kvm_arm_vgic_v3_ops;
1262 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1264 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1266 vcpu->spin_loop.in_spin_loop = val;
1268 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1270 vcpu->spin_loop.dy_eligible = val;
1273 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1275 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1279 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1282 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1284 #ifdef CONFIG_HAVE_KVM_IRQ_BYPASS
1285 bool kvm_arch_has_irq_bypass(void);
1286 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *,
1287 struct irq_bypass_producer *);
1288 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *,
1289 struct irq_bypass_producer *);
1290 void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *);
1291 void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *);
1292 int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq,
1293 uint32_t guest_irq, bool set);
1294 #endif /* CONFIG_HAVE_KVM_IRQ_BYPASS */
1296 #ifdef CONFIG_HAVE_KVM_INVALID_WAKEUPS
1297 /* If we wakeup during the poll time, was it a sucessful poll? */
1298 static inline bool vcpu_valid_wakeup(struct kvm_vcpu *vcpu)
1300 return vcpu->valid_wakeup;
1304 static inline bool vcpu_valid_wakeup(struct kvm_vcpu *vcpu)
1308 #endif /* CONFIG_HAVE_KVM_INVALID_WAKEUPS */
1310 #ifdef CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL
1311 long kvm_arch_vcpu_async_ioctl(struct file *filp,
1312 unsigned int ioctl, unsigned long arg);
1314 static inline long kvm_arch_vcpu_async_ioctl(struct file *filp,
1318 return -ENOIOCTLCMD;
1320 #endif /* CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL */
1322 int kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm,
1323 unsigned long start, unsigned long end, bool blockable);
1325 #ifdef CONFIG_HAVE_KVM_VCPU_RUN_PID_CHANGE
1326 int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu);
1328 static inline int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu)
1332 #endif /* CONFIG_HAVE_KVM_VCPU_RUN_PID_CHANGE */