5 * This work is licensed under the terms of the GNU GPL, version 2. See
6 * the COPYING file in the top-level directory.
9 #include <linux/types.h>
10 #include <linux/hardirq.h>
11 #include <linux/list.h>
12 #include <linux/mutex.h>
13 #include <linux/spinlock.h>
14 #include <linux/signal.h>
15 #include <linux/sched.h>
16 #include <linux/bug.h>
18 #include <linux/mmu_notifier.h>
19 #include <linux/preempt.h>
20 #include <linux/msi.h>
21 #include <linux/slab.h>
22 #include <linux/rcupdate.h>
23 #include <linux/ratelimit.h>
24 #include <linux/err.h>
25 #include <linux/irqflags.h>
26 #include <linux/context_tracking.h>
27 #include <linux/irqbypass.h>
28 #include <linux/swait.h>
29 #include <linux/refcount.h>
30 #include <asm/signal.h>
32 #include <linux/kvm.h>
33 #include <linux/kvm_para.h>
35 #include <linux/kvm_types.h>
37 #include <asm/kvm_host.h>
39 #ifndef KVM_MAX_VCPU_ID
40 #define KVM_MAX_VCPU_ID KVM_MAX_VCPUS
44 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
45 * in kvm, other bits are visible for userspace which are defined in
46 * include/linux/kvm_h.
48 #define KVM_MEMSLOT_INVALID (1UL << 16)
50 /* Two fragments for cross MMIO pages. */
51 #define KVM_MAX_MMIO_FRAGMENTS 2
53 #ifndef KVM_ADDRESS_SPACE_NUM
54 #define KVM_ADDRESS_SPACE_NUM 1
58 * For the normal pfn, the highest 12 bits should be zero,
59 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
60 * mask bit 63 to indicate the noslot pfn.
62 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
63 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
64 #define KVM_PFN_NOSLOT (0x1ULL << 63)
66 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
67 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
68 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
71 * error pfns indicate that the gfn is in slot but faild to
72 * translate it to pfn on host.
74 static inline bool is_error_pfn(kvm_pfn_t pfn)
76 return !!(pfn & KVM_PFN_ERR_MASK);
80 * error_noslot pfns indicate that the gfn can not be
81 * translated to pfn - it is not in slot or failed to
82 * translate it to pfn.
84 static inline bool is_error_noslot_pfn(kvm_pfn_t pfn)
86 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
89 /* noslot pfn indicates that the gfn is not in slot. */
90 static inline bool is_noslot_pfn(kvm_pfn_t pfn)
92 return pfn == KVM_PFN_NOSLOT;
96 * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390)
97 * provide own defines and kvm_is_error_hva
99 #ifndef KVM_HVA_ERR_BAD
101 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
102 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
104 static inline bool kvm_is_error_hva(unsigned long addr)
106 return addr >= PAGE_OFFSET;
111 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
113 static inline bool is_error_page(struct page *page)
119 * Architecture-independent vcpu->requests bit members
120 * Bits 4-7 are reserved for more arch-independent bits.
122 #define KVM_REQ_TLB_FLUSH 0
123 #define KVM_REQ_MMU_RELOAD 1
124 #define KVM_REQ_PENDING_TIMER 2
125 #define KVM_REQ_UNHALT 3
127 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
128 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
130 extern struct kmem_cache *kvm_vcpu_cache;
132 extern spinlock_t kvm_lock;
133 extern struct list_head vm_list;
135 struct kvm_io_range {
138 struct kvm_io_device *dev;
141 #define NR_IOBUS_DEVS 1000
146 struct kvm_io_range range[];
152 KVM_VIRTIO_CCW_NOTIFY_BUS,
157 int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
158 int len, const void *val);
159 int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx,
160 gpa_t addr, int len, const void *val, long cookie);
161 int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
163 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
164 int len, struct kvm_io_device *dev);
165 void kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
166 struct kvm_io_device *dev);
167 struct kvm_io_device *kvm_io_bus_get_dev(struct kvm *kvm, enum kvm_bus bus_idx,
170 #ifdef CONFIG_KVM_ASYNC_PF
171 struct kvm_async_pf {
172 struct work_struct work;
173 struct list_head link;
174 struct list_head queue;
175 struct kvm_vcpu *vcpu;
176 struct mm_struct *mm;
179 struct kvm_arch_async_pf arch;
183 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
184 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
185 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva,
186 struct kvm_arch_async_pf *arch);
187 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
194 READING_SHADOW_PAGE_TABLES,
198 * Sometimes a large or cross-page mmio needs to be broken up into separate
199 * exits for userspace servicing.
201 struct kvm_mmio_fragment {
209 #ifdef CONFIG_PREEMPT_NOTIFIERS
210 struct preempt_notifier preempt_notifier;
216 unsigned long requests;
217 unsigned long guest_debug;
220 struct list_head blocked_vcpu_list;
225 int guest_fpu_loaded, guest_xcr0_loaded;
226 struct swait_queue_head wq;
230 struct kvm_vcpu_stat stat;
231 unsigned int halt_poll_ns;
234 #ifdef CONFIG_HAS_IOMEM
236 int mmio_read_completed;
238 int mmio_cur_fragment;
239 int mmio_nr_fragments;
240 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
243 #ifdef CONFIG_KVM_ASYNC_PF
246 struct list_head queue;
247 struct list_head done;
252 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
254 * Cpu relax intercept or pause loop exit optimization
255 * in_spin_loop: set when a vcpu does a pause loop exit
256 * or cpu relax intercepted.
257 * dy_eligible: indicates whether vcpu is eligible for directed yield.
265 struct kvm_vcpu_arch arch;
266 struct dentry *debugfs_dentry;
269 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
271 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
275 * Some of the bitops functions do not support too long bitmaps.
276 * This number must be determined not to exceed such limits.
278 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
280 struct kvm_memory_slot {
282 unsigned long npages;
283 unsigned long *dirty_bitmap;
284 struct kvm_arch_memory_slot arch;
285 unsigned long userspace_addr;
290 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
292 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
295 struct kvm_s390_adapter_int {
308 struct kvm_kernel_irq_routing_entry {
311 int (*set)(struct kvm_kernel_irq_routing_entry *e,
312 struct kvm *kvm, int irq_source_id, int level,
326 struct kvm_s390_adapter_int adapter;
327 struct kvm_hv_sint hv_sint;
329 struct hlist_node link;
332 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
333 struct kvm_irq_routing_table {
334 int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS];
337 * Array indexed by gsi. Each entry contains list of irq chips
338 * the gsi is connected to.
340 struct hlist_head map[0];
344 #ifndef KVM_PRIVATE_MEM_SLOTS
345 #define KVM_PRIVATE_MEM_SLOTS 0
348 #ifndef KVM_MEM_SLOTS_NUM
349 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
352 #ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
353 static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
361 * memslots are not sorted by id anymore, please use id_to_memslot()
362 * to get the memslot by its id.
364 struct kvm_memslots {
366 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
367 /* The mapping table from slot id to the index in memslots[]. */
368 short id_to_index[KVM_MEM_SLOTS_NUM];
375 struct mutex slots_lock;
376 struct mm_struct *mm; /* userspace tied to this vm */
377 struct kvm_memslots *memslots[KVM_ADDRESS_SPACE_NUM];
378 struct srcu_struct srcu;
379 struct srcu_struct irq_srcu;
380 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
383 * created_vcpus is protected by kvm->lock, and is incremented
384 * at the beginning of KVM_CREATE_VCPU. online_vcpus is only
385 * incremented after storing the kvm_vcpu pointer in vcpus,
386 * and is accessed atomically.
388 atomic_t online_vcpus;
390 int last_boosted_vcpu;
391 struct list_head vm_list;
393 struct kvm_io_bus *buses[KVM_NR_BUSES];
394 #ifdef CONFIG_HAVE_KVM_EVENTFD
397 struct list_head items;
398 struct list_head resampler_list;
399 struct mutex resampler_lock;
401 struct list_head ioeventfds;
403 struct kvm_vm_stat stat;
404 struct kvm_arch arch;
405 refcount_t users_count;
406 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
407 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
408 spinlock_t ring_lock;
409 struct list_head coalesced_zones;
412 struct mutex irq_lock;
413 #ifdef CONFIG_HAVE_KVM_IRQCHIP
415 * Update side is protected by irq_lock.
417 struct kvm_irq_routing_table __rcu *irq_routing;
419 #ifdef CONFIG_HAVE_KVM_IRQFD
420 struct hlist_head irq_ack_notifier_list;
423 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
424 struct mmu_notifier mmu_notifier;
425 unsigned long mmu_notifier_seq;
426 long mmu_notifier_count;
429 struct list_head devices;
430 struct dentry *debugfs_dentry;
431 struct kvm_stat_data **debugfs_stat_data;
434 #define kvm_err(fmt, ...) \
435 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
436 #define kvm_info(fmt, ...) \
437 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
438 #define kvm_debug(fmt, ...) \
439 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
440 #define kvm_debug_ratelimited(fmt, ...) \
441 pr_debug_ratelimited("kvm [%i]: " fmt, task_pid_nr(current), \
443 #define kvm_pr_unimpl(fmt, ...) \
444 pr_err_ratelimited("kvm [%i]: " fmt, \
445 task_tgid_nr(current), ## __VA_ARGS__)
447 /* The guest did something we don't support. */
448 #define vcpu_unimpl(vcpu, fmt, ...) \
449 kvm_pr_unimpl("vcpu%i, guest rIP: 0x%lx " fmt, \
450 (vcpu)->vcpu_id, kvm_rip_read(vcpu), ## __VA_ARGS__)
452 #define vcpu_debug(vcpu, fmt, ...) \
453 kvm_debug("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
454 #define vcpu_debug_ratelimited(vcpu, fmt, ...) \
455 kvm_debug_ratelimited("vcpu%i " fmt, (vcpu)->vcpu_id, \
457 #define vcpu_err(vcpu, fmt, ...) \
458 kvm_err("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
460 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
462 /* Pairs with smp_wmb() in kvm_vm_ioctl_create_vcpu, in case
463 * the caller has read kvm->online_vcpus before (as is the case
464 * for kvm_for_each_vcpu, for example).
467 return kvm->vcpus[i];
470 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
472 idx < atomic_read(&kvm->online_vcpus) && \
473 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
476 static inline struct kvm_vcpu *kvm_get_vcpu_by_id(struct kvm *kvm, int id)
478 struct kvm_vcpu *vcpu = NULL;
483 if (id < KVM_MAX_VCPUS)
484 vcpu = kvm_get_vcpu(kvm, id);
485 if (vcpu && vcpu->vcpu_id == id)
487 kvm_for_each_vcpu(i, vcpu, kvm)
488 if (vcpu->vcpu_id == id)
493 #define kvm_for_each_memslot(memslot, slots) \
494 for (memslot = &slots->memslots[0]; \
495 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
498 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
499 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
501 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
502 void vcpu_put(struct kvm_vcpu *vcpu);
504 #ifdef __KVM_HAVE_IOAPIC
505 void kvm_vcpu_request_scan_ioapic(struct kvm *kvm);
506 void kvm_arch_post_irq_routing_update(struct kvm *kvm);
508 static inline void kvm_vcpu_request_scan_ioapic(struct kvm *kvm)
511 static inline void kvm_arch_post_irq_routing_update(struct kvm *kvm)
516 #ifdef CONFIG_HAVE_KVM_IRQFD
517 int kvm_irqfd_init(void);
518 void kvm_irqfd_exit(void);
520 static inline int kvm_irqfd_init(void)
525 static inline void kvm_irqfd_exit(void)
529 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
530 struct module *module);
533 void kvm_get_kvm(struct kvm *kvm);
534 void kvm_put_kvm(struct kvm *kvm);
536 static inline struct kvm_memslots *__kvm_memslots(struct kvm *kvm, int as_id)
538 return rcu_dereference_check(kvm->memslots[as_id],
539 srcu_read_lock_held(&kvm->srcu)
540 || lockdep_is_held(&kvm->slots_lock));
543 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
545 return __kvm_memslots(kvm, 0);
548 static inline struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu)
550 int as_id = kvm_arch_vcpu_memslots_id(vcpu);
552 return __kvm_memslots(vcpu->kvm, as_id);
555 static inline struct kvm_memory_slot *
556 id_to_memslot(struct kvm_memslots *slots, int id)
558 int index = slots->id_to_index[id];
559 struct kvm_memory_slot *slot;
561 slot = &slots->memslots[index];
563 WARN_ON(slot->id != id);
568 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
569 * - create a new memory slot
570 * - delete an existing memory slot
571 * - modify an existing memory slot
572 * -- move it in the guest physical memory space
573 * -- just change its flags
575 * Since flags can be changed by some of these operations, the following
576 * differentiation is the best we can do for __kvm_set_memory_region():
585 int kvm_set_memory_region(struct kvm *kvm,
586 const struct kvm_userspace_memory_region *mem);
587 int __kvm_set_memory_region(struct kvm *kvm,
588 const struct kvm_userspace_memory_region *mem);
589 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
590 struct kvm_memory_slot *dont);
591 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
592 unsigned long npages);
593 void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots);
594 int kvm_arch_prepare_memory_region(struct kvm *kvm,
595 struct kvm_memory_slot *memslot,
596 const struct kvm_userspace_memory_region *mem,
597 enum kvm_mr_change change);
598 void kvm_arch_commit_memory_region(struct kvm *kvm,
599 const struct kvm_userspace_memory_region *mem,
600 const struct kvm_memory_slot *old,
601 const struct kvm_memory_slot *new,
602 enum kvm_mr_change change);
603 bool kvm_largepages_enabled(void);
604 void kvm_disable_largepages(void);
605 /* flush all memory translations */
606 void kvm_arch_flush_shadow_all(struct kvm *kvm);
607 /* flush memory translations pointing to 'slot' */
608 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
609 struct kvm_memory_slot *slot);
611 int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn,
612 struct page **pages, int nr_pages);
614 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
615 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
616 unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable);
617 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
618 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn,
620 void kvm_release_page_clean(struct page *page);
621 void kvm_release_page_dirty(struct page *page);
622 void kvm_set_page_accessed(struct page *page);
624 kvm_pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
625 kvm_pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
626 kvm_pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
628 kvm_pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
629 kvm_pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
630 kvm_pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn,
631 bool atomic, bool *async, bool write_fault,
634 void kvm_release_pfn_clean(kvm_pfn_t pfn);
635 void kvm_set_pfn_dirty(kvm_pfn_t pfn);
636 void kvm_set_pfn_accessed(kvm_pfn_t pfn);
637 void kvm_get_pfn(kvm_pfn_t pfn);
639 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
641 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
643 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
644 int kvm_vcpu_read_guest_cached(struct kvm_vcpu *vcpu, struct gfn_to_hva_cache *ghc,
645 void *data, unsigned long len);
646 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
647 int offset, int len);
648 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
650 int kvm_vcpu_write_guest_cached(struct kvm_vcpu *v, struct gfn_to_hva_cache *ghc,
651 void *data, unsigned long len);
652 int kvm_vcpu_write_guest_offset_cached(struct kvm_vcpu *v, struct gfn_to_hva_cache *ghc,
653 void *data, int offset, unsigned long len);
654 int kvm_vcpu_gfn_to_hva_cache_init(struct kvm_vcpu *v, struct gfn_to_hva_cache *ghc,
655 gpa_t gpa, unsigned long len);
656 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
657 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
658 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
659 bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
660 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
661 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
663 struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu);
664 struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn);
665 kvm_pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn);
666 kvm_pfn_t kvm_vcpu_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
667 struct page *kvm_vcpu_gfn_to_page(struct kvm_vcpu *vcpu, gfn_t gfn);
668 unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn);
669 unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu *vcpu, gfn_t gfn, bool *writable);
670 int kvm_vcpu_read_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, void *data, int offset,
672 int kvm_vcpu_read_guest_atomic(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
674 int kvm_vcpu_read_guest(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
676 int kvm_vcpu_write_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, const void *data,
677 int offset, int len);
678 int kvm_vcpu_write_guest(struct kvm_vcpu *vcpu, gpa_t gpa, const void *data,
680 void kvm_vcpu_mark_page_dirty(struct kvm_vcpu *vcpu, gfn_t gfn);
682 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
683 void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu);
684 void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu);
685 void kvm_vcpu_wake_up(struct kvm_vcpu *vcpu);
686 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
687 int kvm_vcpu_yield_to(struct kvm_vcpu *target);
688 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
689 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
690 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
692 void kvm_flush_remote_tlbs(struct kvm *kvm);
693 void kvm_reload_remote_mmus(struct kvm *kvm);
694 bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);
696 long kvm_arch_dev_ioctl(struct file *filp,
697 unsigned int ioctl, unsigned long arg);
698 long kvm_arch_vcpu_ioctl(struct file *filp,
699 unsigned int ioctl, unsigned long arg);
700 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
702 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext);
704 int kvm_get_dirty_log(struct kvm *kvm,
705 struct kvm_dirty_log *log, int *is_dirty);
707 int kvm_get_dirty_log_protect(struct kvm *kvm,
708 struct kvm_dirty_log *log, bool *is_dirty);
710 void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
711 struct kvm_memory_slot *slot,
715 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
716 struct kvm_dirty_log *log);
718 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
720 long kvm_arch_vm_ioctl(struct file *filp,
721 unsigned int ioctl, unsigned long arg);
723 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
724 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
726 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
727 struct kvm_translation *tr);
729 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
730 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
731 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
732 struct kvm_sregs *sregs);
733 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
734 struct kvm_sregs *sregs);
735 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
736 struct kvm_mp_state *mp_state);
737 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
738 struct kvm_mp_state *mp_state);
739 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
740 struct kvm_guest_debug *dbg);
741 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
743 int kvm_arch_init(void *opaque);
744 void kvm_arch_exit(void);
746 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
747 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
749 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);
751 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
752 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
753 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
754 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
755 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
756 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
757 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
759 bool kvm_arch_has_vcpu_debugfs(void);
760 int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu);
762 int kvm_arch_hardware_enable(void);
763 void kvm_arch_hardware_disable(void);
764 int kvm_arch_hardware_setup(void);
765 void kvm_arch_hardware_unsetup(void);
766 void kvm_arch_check_processor_compat(void *rtn);
767 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
768 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
770 void *kvm_kvzalloc(unsigned long size);
772 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
773 static inline struct kvm *kvm_arch_alloc_vm(void)
775 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
778 static inline void kvm_arch_free_vm(struct kvm *kvm)
784 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
785 void kvm_arch_register_noncoherent_dma(struct kvm *kvm);
786 void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm);
787 bool kvm_arch_has_noncoherent_dma(struct kvm *kvm);
789 static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm)
793 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm)
797 static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
802 #ifdef __KVM_HAVE_ARCH_ASSIGNED_DEVICE
803 void kvm_arch_start_assignment(struct kvm *kvm);
804 void kvm_arch_end_assignment(struct kvm *kvm);
805 bool kvm_arch_has_assigned_device(struct kvm *kvm);
807 static inline void kvm_arch_start_assignment(struct kvm *kvm)
811 static inline void kvm_arch_end_assignment(struct kvm *kvm)
815 static inline bool kvm_arch_has_assigned_device(struct kvm *kvm)
821 static inline struct swait_queue_head *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
823 #ifdef __KVM_HAVE_ARCH_WQP
824 return vcpu->arch.wqp;
830 #ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
832 * returns true if the virtual interrupt controller is initialized and
833 * ready to accept virtual IRQ. On some architectures the virtual interrupt
834 * controller is dynamically instantiated and this is not always true.
836 bool kvm_arch_intc_initialized(struct kvm *kvm);
838 static inline bool kvm_arch_intc_initialized(struct kvm *kvm)
844 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
845 void kvm_arch_destroy_vm(struct kvm *kvm);
846 void kvm_arch_sync_events(struct kvm *kvm);
848 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
849 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
851 bool kvm_is_reserved_pfn(kvm_pfn_t pfn);
853 struct kvm_irq_ack_notifier {
854 struct hlist_node link;
856 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
859 int kvm_irq_map_gsi(struct kvm *kvm,
860 struct kvm_kernel_irq_routing_entry *entries, int gsi);
861 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin);
863 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
865 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
866 int irq_source_id, int level, bool line_status);
867 int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
868 struct kvm *kvm, int irq_source_id,
869 int level, bool line_status);
870 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
871 void kvm_notify_acked_gsi(struct kvm *kvm, int gsi);
872 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
873 void kvm_register_irq_ack_notifier(struct kvm *kvm,
874 struct kvm_irq_ack_notifier *kian);
875 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
876 struct kvm_irq_ack_notifier *kian);
877 int kvm_request_irq_source_id(struct kvm *kvm);
878 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
880 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
881 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
882 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
884 static inline int kvm_iommu_map_pages(struct kvm *kvm,
885 struct kvm_memory_slot *slot)
890 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
891 struct kvm_memory_slot *slot)
897 * search_memslots() and __gfn_to_memslot() are here because they are
898 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
899 * gfn_to_memslot() itself isn't here as an inline because that would
900 * bloat other code too much.
902 static inline struct kvm_memory_slot *
903 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
905 int start = 0, end = slots->used_slots;
906 int slot = atomic_read(&slots->lru_slot);
907 struct kvm_memory_slot *memslots = slots->memslots;
909 if (gfn >= memslots[slot].base_gfn &&
910 gfn < memslots[slot].base_gfn + memslots[slot].npages)
911 return &memslots[slot];
913 while (start < end) {
914 slot = start + (end - start) / 2;
916 if (gfn >= memslots[slot].base_gfn)
922 if (gfn >= memslots[start].base_gfn &&
923 gfn < memslots[start].base_gfn + memslots[start].npages) {
924 atomic_set(&slots->lru_slot, start);
925 return &memslots[start];
931 static inline struct kvm_memory_slot *
932 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
934 return search_memslots(slots, gfn);
937 static inline unsigned long
938 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
940 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
943 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
945 return gfn_to_memslot(kvm, gfn)->id;
949 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
951 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
953 return slot->base_gfn + gfn_offset;
956 static inline gpa_t gfn_to_gpa(gfn_t gfn)
958 return (gpa_t)gfn << PAGE_SHIFT;
961 static inline gfn_t gpa_to_gfn(gpa_t gpa)
963 return (gfn_t)(gpa >> PAGE_SHIFT);
966 static inline hpa_t pfn_to_hpa(kvm_pfn_t pfn)
968 return (hpa_t)pfn << PAGE_SHIFT;
971 static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa)
973 unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
975 return kvm_is_error_hva(hva);
983 struct kvm_stat_data {
988 struct kvm_stats_debugfs_item {
991 enum kvm_stat_kind kind;
993 extern struct kvm_stats_debugfs_item debugfs_entries[];
994 extern struct dentry *kvm_debugfs_dir;
996 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
997 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
999 if (unlikely(kvm->mmu_notifier_count))
1002 * Ensure the read of mmu_notifier_count happens before the read
1003 * of mmu_notifier_seq. This interacts with the smp_wmb() in
1004 * mmu_notifier_invalidate_range_end to make sure that the caller
1005 * either sees the old (non-zero) value of mmu_notifier_count or
1006 * the new (incremented) value of mmu_notifier_seq.
1007 * PowerPC Book3s HV KVM calls this under a per-page lock
1008 * rather than under kvm->mmu_lock, for scalability, so
1009 * can't rely on kvm->mmu_lock to keep things ordered.
1012 if (kvm->mmu_notifier_seq != mmu_seq)
1018 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
1021 #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that...
1022 #elif defined(CONFIG_ARM64)
1023 #define KVM_MAX_IRQ_ROUTES 4096
1025 #define KVM_MAX_IRQ_ROUTES 1024
1028 int kvm_set_irq_routing(struct kvm *kvm,
1029 const struct kvm_irq_routing_entry *entries,
1032 int kvm_set_routing_entry(struct kvm *kvm,
1033 struct kvm_kernel_irq_routing_entry *e,
1034 const struct kvm_irq_routing_entry *ue);
1035 void kvm_free_irq_routing(struct kvm *kvm);
1039 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
1043 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
1045 #ifdef CONFIG_HAVE_KVM_EVENTFD
1047 void kvm_eventfd_init(struct kvm *kvm);
1048 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
1050 #ifdef CONFIG_HAVE_KVM_IRQFD
1051 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
1052 void kvm_irqfd_release(struct kvm *kvm);
1053 void kvm_irq_routing_update(struct kvm *);
1055 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1060 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1065 static inline void kvm_eventfd_init(struct kvm *kvm) {}
1067 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1072 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1074 #ifdef CONFIG_HAVE_KVM_IRQCHIP
1075 static inline void kvm_irq_routing_update(struct kvm *kvm)
1079 void kvm_arch_irq_routing_update(struct kvm *kvm);
1081 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
1086 #endif /* CONFIG_HAVE_KVM_EVENTFD */
1088 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1091 * Ensure the rest of the request is published to kvm_check_request's
1092 * caller. Paired with the smp_mb__after_atomic in kvm_check_request.
1095 set_bit(req, &vcpu->requests);
1098 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1100 if (test_bit(req, &vcpu->requests)) {
1101 clear_bit(req, &vcpu->requests);
1104 * Ensure the rest of the request is visible to kvm_check_request's
1105 * caller. Paired with the smp_wmb in kvm_make_request.
1107 smp_mb__after_atomic();
1114 extern bool kvm_rebooting;
1116 extern unsigned int halt_poll_ns;
1117 extern unsigned int halt_poll_ns_grow;
1118 extern unsigned int halt_poll_ns_shrink;
1121 struct kvm_device_ops *ops;
1124 struct list_head vm_node;
1127 /* create, destroy, and name are mandatory */
1128 struct kvm_device_ops {
1132 * create is called holding kvm->lock and any operations not suitable
1133 * to do while holding the lock should be deferred to init (see
1136 int (*create)(struct kvm_device *dev, u32 type);
1139 * init is called after create if create is successful and is called
1140 * outside of holding kvm->lock.
1142 void (*init)(struct kvm_device *dev);
1145 * Destroy is responsible for freeing dev.
1147 * Destroy may be called before or after destructors are called
1148 * on emulated I/O regions, depending on whether a reference is
1149 * held by a vcpu or other kvm component that gets destroyed
1150 * after the emulated I/O.
1152 void (*destroy)(struct kvm_device *dev);
1154 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1155 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1156 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1157 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1161 void kvm_device_get(struct kvm_device *dev);
1162 void kvm_device_put(struct kvm_device *dev);
1163 struct kvm_device *kvm_device_from_filp(struct file *filp);
1164 int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type);
1165 void kvm_unregister_device_ops(u32 type);
1167 extern struct kvm_device_ops kvm_mpic_ops;
1168 extern struct kvm_device_ops kvm_xics_ops;
1169 extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
1170 extern struct kvm_device_ops kvm_arm_vgic_v3_ops;
1172 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1174 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1176 vcpu->spin_loop.in_spin_loop = val;
1178 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1180 vcpu->spin_loop.dy_eligible = val;
1183 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1185 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1189 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1192 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1194 #ifdef CONFIG_HAVE_KVM_IRQ_BYPASS
1195 bool kvm_arch_has_irq_bypass(void);
1196 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *,
1197 struct irq_bypass_producer *);
1198 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *,
1199 struct irq_bypass_producer *);
1200 void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *);
1201 void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *);
1202 int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq,
1203 uint32_t guest_irq, bool set);
1204 #endif /* CONFIG_HAVE_KVM_IRQ_BYPASS */
1206 #ifdef CONFIG_HAVE_KVM_INVALID_WAKEUPS
1207 /* If we wakeup during the poll time, was it a sucessful poll? */
1208 static inline bool vcpu_valid_wakeup(struct kvm_vcpu *vcpu)
1210 return vcpu->valid_wakeup;
1214 static inline bool vcpu_valid_wakeup(struct kvm_vcpu *vcpu)
1218 #endif /* CONFIG_HAVE_KVM_INVALID_WAKEUPS */