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 <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)
48 #define KVM_MEMSLOT_INCOHERENT (1UL << 17)
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 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
166 struct kvm_io_device *dev);
168 #ifdef CONFIG_KVM_ASYNC_PF
169 struct kvm_async_pf {
170 struct work_struct work;
171 struct list_head link;
172 struct list_head queue;
173 struct kvm_vcpu *vcpu;
174 struct mm_struct *mm;
177 struct kvm_arch_async_pf arch;
181 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
182 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
183 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva,
184 struct kvm_arch_async_pf *arch);
185 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
192 READING_SHADOW_PAGE_TABLES,
196 * Sometimes a large or cross-page mmio needs to be broken up into separate
197 * exits for userspace servicing.
199 struct kvm_mmio_fragment {
207 #ifdef CONFIG_PREEMPT_NOTIFIERS
208 struct preempt_notifier preempt_notifier;
214 unsigned long requests;
215 unsigned long guest_debug;
218 struct list_head blocked_vcpu_list;
224 int guest_fpu_loaded, guest_xcr0_loaded;
225 unsigned char fpu_counter;
226 struct swait_queue_head wq;
230 struct kvm_vcpu_stat stat;
231 unsigned int halt_poll_ns;
233 #ifdef CONFIG_HAS_IOMEM
235 int mmio_read_completed;
237 int mmio_cur_fragment;
238 int mmio_nr_fragments;
239 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
242 #ifdef CONFIG_KVM_ASYNC_PF
245 struct list_head queue;
246 struct list_head done;
251 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
253 * Cpu relax intercept or pause loop exit optimization
254 * in_spin_loop: set when a vcpu does a pause loop exit
255 * or cpu relax intercepted.
256 * dy_eligible: indicates whether vcpu is eligible for directed yield.
264 struct kvm_vcpu_arch arch;
267 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
269 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
273 * Some of the bitops functions do not support too long bitmaps.
274 * This number must be determined not to exceed such limits.
276 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
278 struct kvm_memory_slot {
280 unsigned long npages;
281 unsigned long *dirty_bitmap;
282 struct kvm_arch_memory_slot arch;
283 unsigned long userspace_addr;
288 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
290 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
293 struct kvm_s390_adapter_int {
306 struct kvm_kernel_irq_routing_entry {
309 int (*set)(struct kvm_kernel_irq_routing_entry *e,
310 struct kvm *kvm, int irq_source_id, int level,
318 struct kvm_s390_adapter_int adapter;
319 struct kvm_hv_sint hv_sint;
321 struct hlist_node link;
324 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
325 struct kvm_irq_routing_table {
326 int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS];
329 * Array indexed by gsi. Each entry contains list of irq chips
330 * the gsi is connected to.
332 struct hlist_head map[0];
336 #ifndef KVM_PRIVATE_MEM_SLOTS
337 #define KVM_PRIVATE_MEM_SLOTS 0
340 #ifndef KVM_MEM_SLOTS_NUM
341 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
344 #ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
345 static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
353 * memslots are not sorted by id anymore, please use id_to_memslot()
354 * to get the memslot by its id.
356 struct kvm_memslots {
358 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
359 /* The mapping table from slot id to the index in memslots[]. */
360 short id_to_index[KVM_MEM_SLOTS_NUM];
367 struct mutex slots_lock;
368 struct mm_struct *mm; /* userspace tied to this vm */
369 struct kvm_memslots *memslots[KVM_ADDRESS_SPACE_NUM];
370 struct srcu_struct srcu;
371 struct srcu_struct irq_srcu;
372 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
373 atomic_t online_vcpus;
374 int last_boosted_vcpu;
375 struct list_head vm_list;
377 struct kvm_io_bus *buses[KVM_NR_BUSES];
378 #ifdef CONFIG_HAVE_KVM_EVENTFD
381 struct list_head items;
382 struct list_head resampler_list;
383 struct mutex resampler_lock;
385 struct list_head ioeventfds;
387 struct kvm_vm_stat stat;
388 struct kvm_arch arch;
389 atomic_t users_count;
390 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
391 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
392 spinlock_t ring_lock;
393 struct list_head coalesced_zones;
396 struct mutex irq_lock;
397 #ifdef CONFIG_HAVE_KVM_IRQCHIP
399 * Update side is protected by irq_lock.
401 struct kvm_irq_routing_table __rcu *irq_routing;
403 #ifdef CONFIG_HAVE_KVM_IRQFD
404 struct hlist_head irq_ack_notifier_list;
407 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
408 struct mmu_notifier mmu_notifier;
409 unsigned long mmu_notifier_seq;
410 long mmu_notifier_count;
413 struct list_head devices;
416 #define kvm_err(fmt, ...) \
417 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
418 #define kvm_info(fmt, ...) \
419 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
420 #define kvm_debug(fmt, ...) \
421 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
422 #define kvm_pr_unimpl(fmt, ...) \
423 pr_err_ratelimited("kvm [%i]: " fmt, \
424 task_tgid_nr(current), ## __VA_ARGS__)
426 /* The guest did something we don't support. */
427 #define vcpu_unimpl(vcpu, fmt, ...) \
428 kvm_pr_unimpl("vcpu%i, guest rIP: 0x%lx " fmt, \
429 (vcpu)->vcpu_id, kvm_rip_read(vcpu), ## __VA_ARGS__)
431 #define vcpu_debug(vcpu, fmt, ...) \
432 kvm_debug("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
433 #define vcpu_err(vcpu, fmt, ...) \
434 kvm_err("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
436 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
438 /* Pairs with smp_wmb() in kvm_vm_ioctl_create_vcpu, in case
439 * the caller has read kvm->online_vcpus before (as is the case
440 * for kvm_for_each_vcpu, for example).
443 return kvm->vcpus[i];
446 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
448 idx < atomic_read(&kvm->online_vcpus) && \
449 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
452 static inline struct kvm_vcpu *kvm_get_vcpu_by_id(struct kvm *kvm, int id)
454 struct kvm_vcpu *vcpu = NULL;
459 if (id < KVM_MAX_VCPUS)
460 vcpu = kvm_get_vcpu(kvm, id);
461 if (vcpu && vcpu->vcpu_id == id)
463 kvm_for_each_vcpu(i, vcpu, kvm)
464 if (vcpu->vcpu_id == id)
469 #define kvm_for_each_memslot(memslot, slots) \
470 for (memslot = &slots->memslots[0]; \
471 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
474 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
475 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
477 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
478 void vcpu_put(struct kvm_vcpu *vcpu);
480 #ifdef __KVM_HAVE_IOAPIC
481 void kvm_vcpu_request_scan_ioapic(struct kvm *kvm);
482 void kvm_arch_post_irq_routing_update(struct kvm *kvm);
484 static inline void kvm_vcpu_request_scan_ioapic(struct kvm *kvm)
487 static inline void kvm_arch_post_irq_routing_update(struct kvm *kvm)
492 #ifdef CONFIG_HAVE_KVM_IRQFD
493 int kvm_irqfd_init(void);
494 void kvm_irqfd_exit(void);
496 static inline int kvm_irqfd_init(void)
501 static inline void kvm_irqfd_exit(void)
505 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
506 struct module *module);
509 void kvm_get_kvm(struct kvm *kvm);
510 void kvm_put_kvm(struct kvm *kvm);
512 static inline struct kvm_memslots *__kvm_memslots(struct kvm *kvm, int as_id)
514 return rcu_dereference_check(kvm->memslots[as_id],
515 srcu_read_lock_held(&kvm->srcu)
516 || lockdep_is_held(&kvm->slots_lock));
519 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
521 return __kvm_memslots(kvm, 0);
524 static inline struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu)
526 int as_id = kvm_arch_vcpu_memslots_id(vcpu);
528 return __kvm_memslots(vcpu->kvm, as_id);
531 static inline struct kvm_memory_slot *
532 id_to_memslot(struct kvm_memslots *slots, int id)
534 int index = slots->id_to_index[id];
535 struct kvm_memory_slot *slot;
537 slot = &slots->memslots[index];
539 WARN_ON(slot->id != id);
544 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
545 * - create a new memory slot
546 * - delete an existing memory slot
547 * - modify an existing memory slot
548 * -- move it in the guest physical memory space
549 * -- just change its flags
551 * Since flags can be changed by some of these operations, the following
552 * differentiation is the best we can do for __kvm_set_memory_region():
561 int kvm_set_memory_region(struct kvm *kvm,
562 const struct kvm_userspace_memory_region *mem);
563 int __kvm_set_memory_region(struct kvm *kvm,
564 const struct kvm_userspace_memory_region *mem);
565 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
566 struct kvm_memory_slot *dont);
567 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
568 unsigned long npages);
569 void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots);
570 int kvm_arch_prepare_memory_region(struct kvm *kvm,
571 struct kvm_memory_slot *memslot,
572 const struct kvm_userspace_memory_region *mem,
573 enum kvm_mr_change change);
574 void kvm_arch_commit_memory_region(struct kvm *kvm,
575 const struct kvm_userspace_memory_region *mem,
576 const struct kvm_memory_slot *old,
577 const struct kvm_memory_slot *new,
578 enum kvm_mr_change change);
579 bool kvm_largepages_enabled(void);
580 void kvm_disable_largepages(void);
581 /* flush all memory translations */
582 void kvm_arch_flush_shadow_all(struct kvm *kvm);
583 /* flush memory translations pointing to 'slot' */
584 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
585 struct kvm_memory_slot *slot);
587 int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn,
588 struct page **pages, int nr_pages);
590 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
591 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
592 unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable);
593 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
594 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn,
596 void kvm_release_page_clean(struct page *page);
597 void kvm_release_page_dirty(struct page *page);
598 void kvm_set_page_accessed(struct page *page);
600 kvm_pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
601 kvm_pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
602 kvm_pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
604 kvm_pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
605 kvm_pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
606 kvm_pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn,
607 bool atomic, bool *async, bool write_fault,
610 void kvm_release_pfn_clean(kvm_pfn_t pfn);
611 void kvm_set_pfn_dirty(kvm_pfn_t pfn);
612 void kvm_set_pfn_accessed(kvm_pfn_t pfn);
613 void kvm_get_pfn(kvm_pfn_t pfn);
615 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
617 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
619 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
620 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
621 void *data, unsigned long len);
622 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
623 int offset, int len);
624 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
626 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
627 void *data, unsigned long len);
628 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
629 gpa_t gpa, unsigned long len);
630 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
631 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
632 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
633 bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
634 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
635 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
637 struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu);
638 struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn);
639 kvm_pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn);
640 kvm_pfn_t kvm_vcpu_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
641 struct page *kvm_vcpu_gfn_to_page(struct kvm_vcpu *vcpu, gfn_t gfn);
642 unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn);
643 unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu *vcpu, gfn_t gfn, bool *writable);
644 int kvm_vcpu_read_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, void *data, int offset,
646 int kvm_vcpu_read_guest_atomic(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
648 int kvm_vcpu_read_guest(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
650 int kvm_vcpu_write_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, const void *data,
651 int offset, int len);
652 int kvm_vcpu_write_guest(struct kvm_vcpu *vcpu, gpa_t gpa, const void *data,
654 void kvm_vcpu_mark_page_dirty(struct kvm_vcpu *vcpu, gfn_t gfn);
656 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
657 void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu);
658 void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu);
659 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
660 int kvm_vcpu_yield_to(struct kvm_vcpu *target);
661 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
662 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
663 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
665 void kvm_flush_remote_tlbs(struct kvm *kvm);
666 void kvm_reload_remote_mmus(struct kvm *kvm);
667 bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);
669 long kvm_arch_dev_ioctl(struct file *filp,
670 unsigned int ioctl, unsigned long arg);
671 long kvm_arch_vcpu_ioctl(struct file *filp,
672 unsigned int ioctl, unsigned long arg);
673 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
675 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext);
677 int kvm_get_dirty_log(struct kvm *kvm,
678 struct kvm_dirty_log *log, int *is_dirty);
680 int kvm_get_dirty_log_protect(struct kvm *kvm,
681 struct kvm_dirty_log *log, bool *is_dirty);
683 void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
684 struct kvm_memory_slot *slot,
688 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
689 struct kvm_dirty_log *log);
691 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
693 long kvm_arch_vm_ioctl(struct file *filp,
694 unsigned int ioctl, unsigned long arg);
696 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
697 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
699 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
700 struct kvm_translation *tr);
702 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
703 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
704 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
705 struct kvm_sregs *sregs);
706 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
707 struct kvm_sregs *sregs);
708 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
709 struct kvm_mp_state *mp_state);
710 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
711 struct kvm_mp_state *mp_state);
712 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
713 struct kvm_guest_debug *dbg);
714 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
716 int kvm_arch_init(void *opaque);
717 void kvm_arch_exit(void);
719 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
720 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
722 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);
724 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
725 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
726 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
727 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
728 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
729 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
730 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
732 int kvm_arch_hardware_enable(void);
733 void kvm_arch_hardware_disable(void);
734 int kvm_arch_hardware_setup(void);
735 void kvm_arch_hardware_unsetup(void);
736 void kvm_arch_check_processor_compat(void *rtn);
737 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
738 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
740 void *kvm_kvzalloc(unsigned long size);
742 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
743 static inline struct kvm *kvm_arch_alloc_vm(void)
745 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
748 static inline void kvm_arch_free_vm(struct kvm *kvm)
754 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
755 void kvm_arch_register_noncoherent_dma(struct kvm *kvm);
756 void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm);
757 bool kvm_arch_has_noncoherent_dma(struct kvm *kvm);
759 static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm)
763 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm)
767 static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
772 #ifdef __KVM_HAVE_ARCH_ASSIGNED_DEVICE
773 void kvm_arch_start_assignment(struct kvm *kvm);
774 void kvm_arch_end_assignment(struct kvm *kvm);
775 bool kvm_arch_has_assigned_device(struct kvm *kvm);
777 static inline void kvm_arch_start_assignment(struct kvm *kvm)
781 static inline void kvm_arch_end_assignment(struct kvm *kvm)
785 static inline bool kvm_arch_has_assigned_device(struct kvm *kvm)
791 static inline struct swait_queue_head *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
793 #ifdef __KVM_HAVE_ARCH_WQP
794 return vcpu->arch.wqp;
800 #ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
802 * returns true if the virtual interrupt controller is initialized and
803 * ready to accept virtual IRQ. On some architectures the virtual interrupt
804 * controller is dynamically instantiated and this is not always true.
806 bool kvm_arch_intc_initialized(struct kvm *kvm);
808 static inline bool kvm_arch_intc_initialized(struct kvm *kvm)
814 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
815 void kvm_arch_destroy_vm(struct kvm *kvm);
816 void kvm_arch_sync_events(struct kvm *kvm);
818 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
819 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
821 bool kvm_is_reserved_pfn(kvm_pfn_t pfn);
823 struct kvm_irq_ack_notifier {
824 struct hlist_node link;
826 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
829 int kvm_irq_map_gsi(struct kvm *kvm,
830 struct kvm_kernel_irq_routing_entry *entries, int gsi);
831 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin);
833 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
835 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
836 int irq_source_id, int level, bool line_status);
837 int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
838 struct kvm *kvm, int irq_source_id,
839 int level, bool line_status);
840 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
841 void kvm_notify_acked_gsi(struct kvm *kvm, int gsi);
842 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
843 void kvm_register_irq_ack_notifier(struct kvm *kvm,
844 struct kvm_irq_ack_notifier *kian);
845 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
846 struct kvm_irq_ack_notifier *kian);
847 int kvm_request_irq_source_id(struct kvm *kvm);
848 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
850 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
851 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
852 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
854 static inline int kvm_iommu_map_pages(struct kvm *kvm,
855 struct kvm_memory_slot *slot)
860 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
861 struct kvm_memory_slot *slot)
866 /* must be called with irqs disabled */
867 static inline void __kvm_guest_enter(void)
870 /* KVM does not hold any references to rcu protected data when it
871 * switches CPU into a guest mode. In fact switching to a guest mode
872 * is very similar to exiting to userspace from rcu point of view. In
873 * addition CPU may stay in a guest mode for quite a long time (up to
874 * one time slice). Lets treat guest mode as quiescent state, just like
875 * we do with user-mode execution.
877 if (!context_tracking_cpu_is_enabled())
878 rcu_virt_note_context_switch(smp_processor_id());
881 /* must be called with irqs disabled */
882 static inline void __kvm_guest_exit(void)
887 static inline void kvm_guest_enter(void)
891 local_irq_save(flags);
893 local_irq_restore(flags);
896 static inline void kvm_guest_exit(void)
900 local_irq_save(flags);
902 local_irq_restore(flags);
906 * search_memslots() and __gfn_to_memslot() are here because they are
907 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
908 * gfn_to_memslot() itself isn't here as an inline because that would
909 * bloat other code too much.
911 static inline struct kvm_memory_slot *
912 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
914 int start = 0, end = slots->used_slots;
915 int slot = atomic_read(&slots->lru_slot);
916 struct kvm_memory_slot *memslots = slots->memslots;
918 if (gfn >= memslots[slot].base_gfn &&
919 gfn < memslots[slot].base_gfn + memslots[slot].npages)
920 return &memslots[slot];
922 while (start < end) {
923 slot = start + (end - start) / 2;
925 if (gfn >= memslots[slot].base_gfn)
931 if (gfn >= memslots[start].base_gfn &&
932 gfn < memslots[start].base_gfn + memslots[start].npages) {
933 atomic_set(&slots->lru_slot, start);
934 return &memslots[start];
940 static inline struct kvm_memory_slot *
941 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
943 return search_memslots(slots, gfn);
946 static inline unsigned long
947 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
949 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
952 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
954 return gfn_to_memslot(kvm, gfn)->id;
958 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
960 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
962 return slot->base_gfn + gfn_offset;
965 static inline gpa_t gfn_to_gpa(gfn_t gfn)
967 return (gpa_t)gfn << PAGE_SHIFT;
970 static inline gfn_t gpa_to_gfn(gpa_t gpa)
972 return (gfn_t)(gpa >> PAGE_SHIFT);
975 static inline hpa_t pfn_to_hpa(kvm_pfn_t pfn)
977 return (hpa_t)pfn << PAGE_SHIFT;
980 static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa)
982 unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
984 return kvm_is_error_hva(hva);
992 struct kvm_stats_debugfs_item {
995 enum kvm_stat_kind kind;
997 extern struct kvm_stats_debugfs_item debugfs_entries[];
998 extern struct dentry *kvm_debugfs_dir;
1000 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
1001 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
1003 if (unlikely(kvm->mmu_notifier_count))
1006 * Ensure the read of mmu_notifier_count happens before the read
1007 * of mmu_notifier_seq. This interacts with the smp_wmb() in
1008 * mmu_notifier_invalidate_range_end to make sure that the caller
1009 * either sees the old (non-zero) value of mmu_notifier_count or
1010 * the new (incremented) value of mmu_notifier_seq.
1011 * PowerPC Book3s HV KVM calls this under a per-page lock
1012 * rather than under kvm->mmu_lock, for scalability, so
1013 * can't rely on kvm->mmu_lock to keep things ordered.
1016 if (kvm->mmu_notifier_seq != mmu_seq)
1022 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
1025 #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that...
1027 #define KVM_MAX_IRQ_ROUTES 1024
1030 int kvm_setup_default_irq_routing(struct kvm *kvm);
1031 int kvm_setup_empty_irq_routing(struct kvm *kvm);
1032 int kvm_set_irq_routing(struct kvm *kvm,
1033 const struct kvm_irq_routing_entry *entries,
1036 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
1037 const struct kvm_irq_routing_entry *ue);
1038 void kvm_free_irq_routing(struct kvm *kvm);
1042 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
1046 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
1048 #ifdef CONFIG_HAVE_KVM_EVENTFD
1050 void kvm_eventfd_init(struct kvm *kvm);
1051 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
1053 #ifdef CONFIG_HAVE_KVM_IRQFD
1054 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
1055 void kvm_irqfd_release(struct kvm *kvm);
1056 void kvm_irq_routing_update(struct kvm *);
1058 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1063 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1068 static inline void kvm_eventfd_init(struct kvm *kvm) {}
1070 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1075 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1077 #ifdef CONFIG_HAVE_KVM_IRQCHIP
1078 static inline void kvm_irq_routing_update(struct kvm *kvm)
1082 void kvm_arch_irq_routing_update(struct kvm *kvm);
1084 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
1089 #endif /* CONFIG_HAVE_KVM_EVENTFD */
1091 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
1092 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
1094 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
1097 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1100 * Ensure the rest of the request is published to kvm_check_request's
1101 * caller. Paired with the smp_mb__after_atomic in kvm_check_request.
1104 set_bit(req, &vcpu->requests);
1107 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1109 if (test_bit(req, &vcpu->requests)) {
1110 clear_bit(req, &vcpu->requests);
1113 * Ensure the rest of the request is visible to kvm_check_request's
1114 * caller. Paired with the smp_wmb in kvm_make_request.
1116 smp_mb__after_atomic();
1123 extern bool kvm_rebooting;
1126 struct kvm_device_ops *ops;
1129 struct list_head vm_node;
1132 /* create, destroy, and name are mandatory */
1133 struct kvm_device_ops {
1135 int (*create)(struct kvm_device *dev, u32 type);
1138 * Destroy is responsible for freeing dev.
1140 * Destroy may be called before or after destructors are called
1141 * on emulated I/O regions, depending on whether a reference is
1142 * held by a vcpu or other kvm component that gets destroyed
1143 * after the emulated I/O.
1145 void (*destroy)(struct kvm_device *dev);
1147 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1148 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1149 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1150 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1154 void kvm_device_get(struct kvm_device *dev);
1155 void kvm_device_put(struct kvm_device *dev);
1156 struct kvm_device *kvm_device_from_filp(struct file *filp);
1157 int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type);
1158 void kvm_unregister_device_ops(u32 type);
1160 extern struct kvm_device_ops kvm_mpic_ops;
1161 extern struct kvm_device_ops kvm_xics_ops;
1162 extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
1163 extern struct kvm_device_ops kvm_arm_vgic_v3_ops;
1165 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1167 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1169 vcpu->spin_loop.in_spin_loop = val;
1171 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1173 vcpu->spin_loop.dy_eligible = val;
1176 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1178 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1182 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1185 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1187 #ifdef CONFIG_HAVE_KVM_IRQ_BYPASS
1188 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *,
1189 struct irq_bypass_producer *);
1190 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *,
1191 struct irq_bypass_producer *);
1192 void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *);
1193 void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *);
1194 int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq,
1195 uint32_t guest_irq, bool set);
1196 #endif /* CONFIG_HAVE_KVM_IRQ_BYPASS */