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 <asm/signal.h>
30 #include <linux/kvm.h>
31 #include <linux/kvm_para.h>
33 #include <linux/kvm_types.h>
35 #include <asm/kvm_host.h>
38 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
39 * in kvm, other bits are visible for userspace which are defined in
40 * include/linux/kvm_h.
42 #define KVM_MEMSLOT_INVALID (1UL << 16)
43 #define KVM_MEMSLOT_INCOHERENT (1UL << 17)
45 /* Two fragments for cross MMIO pages. */
46 #define KVM_MAX_MMIO_FRAGMENTS 2
48 #ifndef KVM_ADDRESS_SPACE_NUM
49 #define KVM_ADDRESS_SPACE_NUM 1
53 * For the normal pfn, the highest 12 bits should be zero,
54 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
55 * mask bit 63 to indicate the noslot pfn.
57 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
58 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
59 #define KVM_PFN_NOSLOT (0x1ULL << 63)
61 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
62 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
63 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
66 * error pfns indicate that the gfn is in slot but faild to
67 * translate it to pfn on host.
69 static inline bool is_error_pfn(pfn_t pfn)
71 return !!(pfn & KVM_PFN_ERR_MASK);
75 * error_noslot pfns indicate that the gfn can not be
76 * translated to pfn - it is not in slot or failed to
77 * translate it to pfn.
79 static inline bool is_error_noslot_pfn(pfn_t pfn)
81 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
84 /* noslot pfn indicates that the gfn is not in slot. */
85 static inline bool is_noslot_pfn(pfn_t pfn)
87 return pfn == KVM_PFN_NOSLOT;
91 * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390)
92 * provide own defines and kvm_is_error_hva
94 #ifndef KVM_HVA_ERR_BAD
96 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
97 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
99 static inline bool kvm_is_error_hva(unsigned long addr)
101 return addr >= PAGE_OFFSET;
106 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
108 static inline bool is_error_page(struct page *page)
114 * Architecture-independent vcpu->requests bit members
115 * Bits 4-7 are reserved for more arch-independent bits.
117 #define KVM_REQ_TLB_FLUSH 0
118 #define KVM_REQ_MMU_RELOAD 1
119 #define KVM_REQ_PENDING_TIMER 2
120 #define KVM_REQ_UNHALT 3
122 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
123 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
125 extern struct kmem_cache *kvm_vcpu_cache;
127 extern spinlock_t kvm_lock;
128 extern struct list_head vm_list;
130 struct kvm_io_range {
133 struct kvm_io_device *dev;
136 #define NR_IOBUS_DEVS 1000
141 struct kvm_io_range range[];
147 KVM_VIRTIO_CCW_NOTIFY_BUS,
152 int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
153 int len, const void *val);
154 int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx,
155 gpa_t addr, int len, const void *val, long cookie);
156 int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
158 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
159 int len, struct kvm_io_device *dev);
160 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
161 struct kvm_io_device *dev);
163 #ifdef CONFIG_KVM_ASYNC_PF
164 struct kvm_async_pf {
165 struct work_struct work;
166 struct list_head link;
167 struct list_head queue;
168 struct kvm_vcpu *vcpu;
169 struct mm_struct *mm;
172 struct kvm_arch_async_pf arch;
176 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
177 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
178 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva,
179 struct kvm_arch_async_pf *arch);
180 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
187 READING_SHADOW_PAGE_TABLES,
191 * Sometimes a large or cross-page mmio needs to be broken up into separate
192 * exits for userspace servicing.
194 struct kvm_mmio_fragment {
202 #ifdef CONFIG_PREEMPT_NOTIFIERS
203 struct preempt_notifier preempt_notifier;
209 unsigned long requests;
210 unsigned long guest_debug;
213 struct list_head blocked_vcpu_list;
219 int guest_fpu_loaded, guest_xcr0_loaded;
220 unsigned char fpu_counter;
221 wait_queue_head_t wq;
225 struct kvm_vcpu_stat stat;
226 unsigned int halt_poll_ns;
228 #ifdef CONFIG_HAS_IOMEM
230 int mmio_read_completed;
232 int mmio_cur_fragment;
233 int mmio_nr_fragments;
234 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
237 #ifdef CONFIG_KVM_ASYNC_PF
240 struct list_head queue;
241 struct list_head done;
246 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
248 * Cpu relax intercept or pause loop exit optimization
249 * in_spin_loop: set when a vcpu does a pause loop exit
250 * or cpu relax intercepted.
251 * dy_eligible: indicates whether vcpu is eligible for directed yield.
259 struct kvm_vcpu_arch arch;
262 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
264 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
268 * Some of the bitops functions do not support too long bitmaps.
269 * This number must be determined not to exceed such limits.
271 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
273 struct kvm_memory_slot {
275 unsigned long npages;
276 unsigned long *dirty_bitmap;
277 struct kvm_arch_memory_slot arch;
278 unsigned long userspace_addr;
283 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
285 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
288 struct kvm_s390_adapter_int {
301 struct kvm_kernel_irq_routing_entry {
304 int (*set)(struct kvm_kernel_irq_routing_entry *e,
305 struct kvm *kvm, int irq_source_id, int level,
313 struct kvm_s390_adapter_int adapter;
314 struct kvm_hv_sint hv_sint;
316 struct hlist_node link;
319 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
320 struct kvm_irq_routing_table {
321 int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS];
324 * Array indexed by gsi. Each entry contains list of irq chips
325 * the gsi is connected to.
327 struct hlist_head map[0];
331 #ifndef KVM_PRIVATE_MEM_SLOTS
332 #define KVM_PRIVATE_MEM_SLOTS 0
335 #ifndef KVM_MEM_SLOTS_NUM
336 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
339 #ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
340 static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
348 * memslots are not sorted by id anymore, please use id_to_memslot()
349 * to get the memslot by its id.
351 struct kvm_memslots {
353 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
354 /* The mapping table from slot id to the index in memslots[]. */
355 short id_to_index[KVM_MEM_SLOTS_NUM];
362 struct mutex slots_lock;
363 struct mm_struct *mm; /* userspace tied to this vm */
364 struct kvm_memslots *memslots[KVM_ADDRESS_SPACE_NUM];
365 struct srcu_struct srcu;
366 struct srcu_struct irq_srcu;
367 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
368 atomic_t online_vcpus;
369 int last_boosted_vcpu;
370 struct list_head vm_list;
372 struct kvm_io_bus *buses[KVM_NR_BUSES];
373 #ifdef CONFIG_HAVE_KVM_EVENTFD
376 struct list_head items;
377 struct list_head resampler_list;
378 struct mutex resampler_lock;
380 struct list_head ioeventfds;
382 struct kvm_vm_stat stat;
383 struct kvm_arch arch;
384 atomic_t users_count;
385 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
386 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
387 spinlock_t ring_lock;
388 struct list_head coalesced_zones;
391 struct mutex irq_lock;
392 #ifdef CONFIG_HAVE_KVM_IRQCHIP
394 * Update side is protected by irq_lock.
396 struct kvm_irq_routing_table __rcu *irq_routing;
398 #ifdef CONFIG_HAVE_KVM_IRQFD
399 struct hlist_head irq_ack_notifier_list;
402 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
403 struct mmu_notifier mmu_notifier;
404 unsigned long mmu_notifier_seq;
405 long mmu_notifier_count;
408 struct list_head devices;
411 #define kvm_err(fmt, ...) \
412 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
413 #define kvm_info(fmt, ...) \
414 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
415 #define kvm_debug(fmt, ...) \
416 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
417 #define kvm_pr_unimpl(fmt, ...) \
418 pr_err_ratelimited("kvm [%i]: " fmt, \
419 task_tgid_nr(current), ## __VA_ARGS__)
421 /* The guest did something we don't support. */
422 #define vcpu_unimpl(vcpu, fmt, ...) \
423 kvm_pr_unimpl("vcpu%i, guest rIP: 0x%lx " fmt, \
424 (vcpu)->vcpu_id, kvm_rip_read(vcpu), ## __VA_ARGS__)
426 #define vcpu_debug(vcpu, fmt, ...) \
427 kvm_debug("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
428 #define vcpu_err(vcpu, fmt, ...) \
429 kvm_err("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
431 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
433 /* Pairs with smp_wmb() in kvm_vm_ioctl_create_vcpu, in case
434 * the caller has read kvm->online_vcpus before (as is the case
435 * for kvm_for_each_vcpu, for example).
438 return kvm->vcpus[i];
441 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
443 idx < atomic_read(&kvm->online_vcpus) && \
444 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
447 static inline struct kvm_vcpu *kvm_get_vcpu_by_id(struct kvm *kvm, int id)
449 struct kvm_vcpu *vcpu;
452 if (id < 0 || id >= KVM_MAX_VCPUS)
454 vcpu = kvm_get_vcpu(kvm, id);
455 if (vcpu && vcpu->vcpu_id == id)
457 kvm_for_each_vcpu(i, vcpu, kvm)
458 if (vcpu->vcpu_id == id)
463 #define kvm_for_each_memslot(memslot, slots) \
464 for (memslot = &slots->memslots[0]; \
465 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
468 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
469 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
471 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
472 void vcpu_put(struct kvm_vcpu *vcpu);
474 #ifdef __KVM_HAVE_IOAPIC
475 void kvm_vcpu_request_scan_ioapic(struct kvm *kvm);
476 void kvm_arch_post_irq_routing_update(struct kvm *kvm);
478 static inline void kvm_vcpu_request_scan_ioapic(struct kvm *kvm)
481 static inline void kvm_arch_post_irq_routing_update(struct kvm *kvm)
486 #ifdef CONFIG_HAVE_KVM_IRQFD
487 int kvm_irqfd_init(void);
488 void kvm_irqfd_exit(void);
490 static inline int kvm_irqfd_init(void)
495 static inline void kvm_irqfd_exit(void)
499 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
500 struct module *module);
503 void kvm_get_kvm(struct kvm *kvm);
504 void kvm_put_kvm(struct kvm *kvm);
506 static inline struct kvm_memslots *__kvm_memslots(struct kvm *kvm, int as_id)
508 return rcu_dereference_check(kvm->memslots[as_id],
509 srcu_read_lock_held(&kvm->srcu)
510 || lockdep_is_held(&kvm->slots_lock));
513 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
515 return __kvm_memslots(kvm, 0);
518 static inline struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu)
520 int as_id = kvm_arch_vcpu_memslots_id(vcpu);
522 return __kvm_memslots(vcpu->kvm, as_id);
525 static inline struct kvm_memory_slot *
526 id_to_memslot(struct kvm_memslots *slots, int id)
528 int index = slots->id_to_index[id];
529 struct kvm_memory_slot *slot;
531 slot = &slots->memslots[index];
533 WARN_ON(slot->id != id);
538 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
539 * - create a new memory slot
540 * - delete an existing memory slot
541 * - modify an existing memory slot
542 * -- move it in the guest physical memory space
543 * -- just change its flags
545 * Since flags can be changed by some of these operations, the following
546 * differentiation is the best we can do for __kvm_set_memory_region():
555 int kvm_set_memory_region(struct kvm *kvm,
556 const struct kvm_userspace_memory_region *mem);
557 int __kvm_set_memory_region(struct kvm *kvm,
558 const struct kvm_userspace_memory_region *mem);
559 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
560 struct kvm_memory_slot *dont);
561 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
562 unsigned long npages);
563 void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots);
564 int kvm_arch_prepare_memory_region(struct kvm *kvm,
565 struct kvm_memory_slot *memslot,
566 const struct kvm_userspace_memory_region *mem,
567 enum kvm_mr_change change);
568 void kvm_arch_commit_memory_region(struct kvm *kvm,
569 const struct kvm_userspace_memory_region *mem,
570 const struct kvm_memory_slot *old,
571 const struct kvm_memory_slot *new,
572 enum kvm_mr_change change);
573 bool kvm_largepages_enabled(void);
574 void kvm_disable_largepages(void);
575 /* flush all memory translations */
576 void kvm_arch_flush_shadow_all(struct kvm *kvm);
577 /* flush memory translations pointing to 'slot' */
578 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
579 struct kvm_memory_slot *slot);
581 int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn,
582 struct page **pages, int nr_pages);
584 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
585 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
586 unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable);
587 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
588 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn,
590 void kvm_release_page_clean(struct page *page);
591 void kvm_release_page_dirty(struct page *page);
592 void kvm_set_page_accessed(struct page *page);
594 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
595 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
596 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
598 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
599 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
600 pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn, bool atomic,
601 bool *async, bool write_fault, bool *writable);
603 void kvm_release_pfn_clean(pfn_t pfn);
604 void kvm_set_pfn_dirty(pfn_t pfn);
605 void kvm_set_pfn_accessed(pfn_t pfn);
606 void kvm_get_pfn(pfn_t pfn);
608 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
610 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
612 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
613 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
614 void *data, unsigned long len);
615 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
616 int offset, int len);
617 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
619 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
620 void *data, unsigned long len);
621 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
622 gpa_t gpa, unsigned long len);
623 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
624 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
625 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
626 bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
627 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
628 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
630 struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu);
631 struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn);
632 pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn);
633 pfn_t kvm_vcpu_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
634 struct page *kvm_vcpu_gfn_to_page(struct kvm_vcpu *vcpu, gfn_t gfn);
635 unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn);
636 unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu *vcpu, gfn_t gfn, bool *writable);
637 int kvm_vcpu_read_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, void *data, int offset,
639 int kvm_vcpu_read_guest_atomic(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
641 int kvm_vcpu_read_guest(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
643 int kvm_vcpu_write_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, const void *data,
644 int offset, int len);
645 int kvm_vcpu_write_guest(struct kvm_vcpu *vcpu, gpa_t gpa, const void *data,
647 void kvm_vcpu_mark_page_dirty(struct kvm_vcpu *vcpu, gfn_t gfn);
649 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
650 void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu);
651 void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu);
652 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
653 int kvm_vcpu_yield_to(struct kvm_vcpu *target);
654 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
655 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
656 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
658 void kvm_flush_remote_tlbs(struct kvm *kvm);
659 void kvm_reload_remote_mmus(struct kvm *kvm);
660 bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);
662 long kvm_arch_dev_ioctl(struct file *filp,
663 unsigned int ioctl, unsigned long arg);
664 long kvm_arch_vcpu_ioctl(struct file *filp,
665 unsigned int ioctl, unsigned long arg);
666 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
668 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext);
670 int kvm_get_dirty_log(struct kvm *kvm,
671 struct kvm_dirty_log *log, int *is_dirty);
673 int kvm_get_dirty_log_protect(struct kvm *kvm,
674 struct kvm_dirty_log *log, bool *is_dirty);
676 void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
677 struct kvm_memory_slot *slot,
681 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
682 struct kvm_dirty_log *log);
684 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
686 long kvm_arch_vm_ioctl(struct file *filp,
687 unsigned int ioctl, unsigned long arg);
689 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
690 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
692 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
693 struct kvm_translation *tr);
695 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
696 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
697 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
698 struct kvm_sregs *sregs);
699 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
700 struct kvm_sregs *sregs);
701 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
702 struct kvm_mp_state *mp_state);
703 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
704 struct kvm_mp_state *mp_state);
705 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
706 struct kvm_guest_debug *dbg);
707 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
709 int kvm_arch_init(void *opaque);
710 void kvm_arch_exit(void);
712 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
713 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
715 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);
717 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
718 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
719 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
720 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
721 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
722 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
723 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
725 int kvm_arch_hardware_enable(void);
726 void kvm_arch_hardware_disable(void);
727 int kvm_arch_hardware_setup(void);
728 void kvm_arch_hardware_unsetup(void);
729 void kvm_arch_check_processor_compat(void *rtn);
730 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
731 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
733 void *kvm_kvzalloc(unsigned long size);
735 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
736 static inline struct kvm *kvm_arch_alloc_vm(void)
738 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
741 static inline void kvm_arch_free_vm(struct kvm *kvm)
747 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
748 void kvm_arch_register_noncoherent_dma(struct kvm *kvm);
749 void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm);
750 bool kvm_arch_has_noncoherent_dma(struct kvm *kvm);
752 static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm)
756 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm)
760 static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
765 #ifdef __KVM_HAVE_ARCH_ASSIGNED_DEVICE
766 void kvm_arch_start_assignment(struct kvm *kvm);
767 void kvm_arch_end_assignment(struct kvm *kvm);
768 bool kvm_arch_has_assigned_device(struct kvm *kvm);
770 static inline void kvm_arch_start_assignment(struct kvm *kvm)
774 static inline void kvm_arch_end_assignment(struct kvm *kvm)
778 static inline bool kvm_arch_has_assigned_device(struct kvm *kvm)
784 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
786 #ifdef __KVM_HAVE_ARCH_WQP
787 return vcpu->arch.wqp;
793 #ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
795 * returns true if the virtual interrupt controller is initialized and
796 * ready to accept virtual IRQ. On some architectures the virtual interrupt
797 * controller is dynamically instantiated and this is not always true.
799 bool kvm_arch_intc_initialized(struct kvm *kvm);
801 static inline bool kvm_arch_intc_initialized(struct kvm *kvm)
807 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
808 void kvm_arch_destroy_vm(struct kvm *kvm);
809 void kvm_arch_sync_events(struct kvm *kvm);
811 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
812 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
814 bool kvm_is_reserved_pfn(pfn_t pfn);
816 struct kvm_irq_ack_notifier {
817 struct hlist_node link;
819 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
822 int kvm_irq_map_gsi(struct kvm *kvm,
823 struct kvm_kernel_irq_routing_entry *entries, int gsi);
824 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin);
826 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
828 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
829 int irq_source_id, int level, bool line_status);
830 int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
831 struct kvm *kvm, int irq_source_id,
832 int level, bool line_status);
833 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
834 void kvm_notify_acked_gsi(struct kvm *kvm, int gsi);
835 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
836 void kvm_register_irq_ack_notifier(struct kvm *kvm,
837 struct kvm_irq_ack_notifier *kian);
838 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
839 struct kvm_irq_ack_notifier *kian);
840 int kvm_request_irq_source_id(struct kvm *kvm);
841 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
843 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
844 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
845 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
847 static inline int kvm_iommu_map_pages(struct kvm *kvm,
848 struct kvm_memory_slot *slot)
853 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
854 struct kvm_memory_slot *slot)
859 /* must be called with irqs disabled */
860 static inline void __kvm_guest_enter(void)
863 /* KVM does not hold any references to rcu protected data when it
864 * switches CPU into a guest mode. In fact switching to a guest mode
865 * is very similar to exiting to userspace from rcu point of view. In
866 * addition CPU may stay in a guest mode for quite a long time (up to
867 * one time slice). Lets treat guest mode as quiescent state, just like
868 * we do with user-mode execution.
870 if (!context_tracking_cpu_is_enabled())
871 rcu_virt_note_context_switch(smp_processor_id());
874 /* must be called with irqs disabled */
875 static inline void __kvm_guest_exit(void)
880 static inline void kvm_guest_enter(void)
884 local_irq_save(flags);
886 local_irq_restore(flags);
889 static inline void kvm_guest_exit(void)
893 local_irq_save(flags);
895 local_irq_restore(flags);
899 * search_memslots() and __gfn_to_memslot() are here because they are
900 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
901 * gfn_to_memslot() itself isn't here as an inline because that would
902 * bloat other code too much.
904 static inline struct kvm_memory_slot *
905 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
907 int start = 0, end = slots->used_slots;
908 int slot = atomic_read(&slots->lru_slot);
909 struct kvm_memory_slot *memslots = slots->memslots;
911 if (gfn >= memslots[slot].base_gfn &&
912 gfn < memslots[slot].base_gfn + memslots[slot].npages)
913 return &memslots[slot];
915 while (start < end) {
916 slot = start + (end - start) / 2;
918 if (gfn >= memslots[slot].base_gfn)
924 if (gfn >= memslots[start].base_gfn &&
925 gfn < memslots[start].base_gfn + memslots[start].npages) {
926 atomic_set(&slots->lru_slot, start);
927 return &memslots[start];
933 static inline struct kvm_memory_slot *
934 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
936 return search_memslots(slots, gfn);
939 static inline unsigned long
940 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
942 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
945 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
947 return gfn_to_memslot(kvm, gfn)->id;
951 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
953 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
955 return slot->base_gfn + gfn_offset;
958 static inline gpa_t gfn_to_gpa(gfn_t gfn)
960 return (gpa_t)gfn << PAGE_SHIFT;
963 static inline gfn_t gpa_to_gfn(gpa_t gpa)
965 return (gfn_t)(gpa >> PAGE_SHIFT);
968 static inline hpa_t pfn_to_hpa(pfn_t pfn)
970 return (hpa_t)pfn << PAGE_SHIFT;
973 static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa)
975 unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
977 return kvm_is_error_hva(hva);
985 struct kvm_stats_debugfs_item {
988 enum kvm_stat_kind kind;
990 extern struct kvm_stats_debugfs_item debugfs_entries[];
991 extern struct dentry *kvm_debugfs_dir;
993 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
994 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
996 if (unlikely(kvm->mmu_notifier_count))
999 * Ensure the read of mmu_notifier_count happens before the read
1000 * of mmu_notifier_seq. This interacts with the smp_wmb() in
1001 * mmu_notifier_invalidate_range_end to make sure that the caller
1002 * either sees the old (non-zero) value of mmu_notifier_count or
1003 * the new (incremented) value of mmu_notifier_seq.
1004 * PowerPC Book3s HV KVM calls this under a per-page lock
1005 * rather than under kvm->mmu_lock, for scalability, so
1006 * can't rely on kvm->mmu_lock to keep things ordered.
1009 if (kvm->mmu_notifier_seq != mmu_seq)
1015 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
1018 #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that...
1020 #define KVM_MAX_IRQ_ROUTES 1024
1023 int kvm_setup_default_irq_routing(struct kvm *kvm);
1024 int kvm_setup_empty_irq_routing(struct kvm *kvm);
1025 int kvm_set_irq_routing(struct kvm *kvm,
1026 const struct kvm_irq_routing_entry *entries,
1029 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
1030 const struct kvm_irq_routing_entry *ue);
1031 void kvm_free_irq_routing(struct kvm *kvm);
1035 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
1039 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
1041 #ifdef CONFIG_HAVE_KVM_EVENTFD
1043 void kvm_eventfd_init(struct kvm *kvm);
1044 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
1046 #ifdef CONFIG_HAVE_KVM_IRQFD
1047 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
1048 void kvm_irqfd_release(struct kvm *kvm);
1049 void kvm_irq_routing_update(struct kvm *);
1051 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1056 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1061 static inline void kvm_eventfd_init(struct kvm *kvm) {}
1063 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1068 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1070 #ifdef CONFIG_HAVE_KVM_IRQCHIP
1071 static inline void kvm_irq_routing_update(struct kvm *kvm)
1075 void kvm_arch_irq_routing_update(struct kvm *kvm);
1077 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
1082 #endif /* CONFIG_HAVE_KVM_EVENTFD */
1084 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
1085 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
1087 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
1090 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1092 set_bit(req, &vcpu->requests);
1095 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1097 if (test_bit(req, &vcpu->requests)) {
1098 clear_bit(req, &vcpu->requests);
1105 extern bool kvm_rebooting;
1108 struct kvm_device_ops *ops;
1111 struct list_head vm_node;
1114 /* create, destroy, and name are mandatory */
1115 struct kvm_device_ops {
1117 int (*create)(struct kvm_device *dev, u32 type);
1120 * Destroy is responsible for freeing dev.
1122 * Destroy may be called before or after destructors are called
1123 * on emulated I/O regions, depending on whether a reference is
1124 * held by a vcpu or other kvm component that gets destroyed
1125 * after the emulated I/O.
1127 void (*destroy)(struct kvm_device *dev);
1129 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1130 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1131 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1132 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1136 void kvm_device_get(struct kvm_device *dev);
1137 void kvm_device_put(struct kvm_device *dev);
1138 struct kvm_device *kvm_device_from_filp(struct file *filp);
1139 int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type);
1140 void kvm_unregister_device_ops(u32 type);
1142 extern struct kvm_device_ops kvm_mpic_ops;
1143 extern struct kvm_device_ops kvm_xics_ops;
1144 extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
1145 extern struct kvm_device_ops kvm_arm_vgic_v3_ops;
1147 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1149 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1151 vcpu->spin_loop.in_spin_loop = val;
1153 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1155 vcpu->spin_loop.dy_eligible = val;
1158 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1160 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1164 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1167 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1169 #ifdef CONFIG_HAVE_KVM_IRQ_BYPASS
1170 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *,
1171 struct irq_bypass_producer *);
1172 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *,
1173 struct irq_bypass_producer *);
1174 void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *);
1175 void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *);
1176 int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq,
1177 uint32_t guest_irq, bool set);
1178 #endif /* CONFIG_HAVE_KVM_IRQ_BYPASS */