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 <asm/signal.h>
29 #include <linux/kvm.h>
30 #include <linux/kvm_para.h>
32 #include <linux/kvm_types.h>
34 #include <asm/kvm_host.h>
37 #define KVM_MMIO_SIZE 8
41 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
42 * in kvm, other bits are visible for userspace which are defined in
43 * include/linux/kvm_h.
45 #define KVM_MEMSLOT_INVALID (1UL << 16)
47 /* Two fragments for cross MMIO pages. */
48 #define KVM_MAX_MMIO_FRAGMENTS 2
51 * For the normal pfn, the highest 12 bits should be zero,
52 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
53 * mask bit 63 to indicate the noslot pfn.
55 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
56 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
57 #define KVM_PFN_NOSLOT (0x1ULL << 63)
59 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
60 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
61 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
64 * error pfns indicate that the gfn is in slot but faild to
65 * translate it to pfn on host.
67 static inline bool is_error_pfn(pfn_t pfn)
69 return !!(pfn & KVM_PFN_ERR_MASK);
73 * error_noslot pfns indicate that the gfn can not be
74 * translated to pfn - it is not in slot or failed to
75 * translate it to pfn.
77 static inline bool is_error_noslot_pfn(pfn_t pfn)
79 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
82 /* noslot pfn indicates that the gfn is not in slot. */
83 static inline bool is_noslot_pfn(pfn_t pfn)
85 return pfn == KVM_PFN_NOSLOT;
88 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
89 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
91 static inline bool kvm_is_error_hva(unsigned long addr)
93 return addr >= PAGE_OFFSET;
96 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
98 static inline bool is_error_page(struct page *page)
104 * vcpu->requests bit members
106 #define KVM_REQ_TLB_FLUSH 0
107 #define KVM_REQ_MIGRATE_TIMER 1
108 #define KVM_REQ_REPORT_TPR_ACCESS 2
109 #define KVM_REQ_MMU_RELOAD 3
110 #define KVM_REQ_TRIPLE_FAULT 4
111 #define KVM_REQ_PENDING_TIMER 5
112 #define KVM_REQ_UNHALT 6
113 #define KVM_REQ_MMU_SYNC 7
114 #define KVM_REQ_CLOCK_UPDATE 8
115 #define KVM_REQ_KICK 9
116 #define KVM_REQ_DEACTIVATE_FPU 10
117 #define KVM_REQ_EVENT 11
118 #define KVM_REQ_APF_HALT 12
119 #define KVM_REQ_STEAL_UPDATE 13
120 #define KVM_REQ_NMI 14
121 #define KVM_REQ_PMU 15
122 #define KVM_REQ_PMI 16
123 #define KVM_REQ_WATCHDOG 17
124 #define KVM_REQ_MASTERCLOCK_UPDATE 18
125 #define KVM_REQ_MCLOCK_INPROGRESS 19
126 #define KVM_REQ_EPR_EXIT 20
127 #define KVM_REQ_SCAN_IOAPIC 21
128 #define KVM_REQ_GLOBAL_CLOCK_UPDATE 22
130 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
131 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
135 extern struct kmem_cache *kvm_vcpu_cache;
137 extern raw_spinlock_t kvm_lock;
138 extern struct list_head vm_list;
140 struct kvm_io_range {
143 struct kvm_io_device *dev;
146 #define NR_IOBUS_DEVS 1000
151 struct kvm_io_range range[];
157 KVM_VIRTIO_CCW_NOTIFY_BUS,
161 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
162 int len, const void *val);
163 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
165 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
166 int len, struct kvm_io_device *dev);
167 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
168 struct kvm_io_device *dev);
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;
184 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
185 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
186 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
187 struct kvm_arch_async_pf *arch);
188 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
195 READING_SHADOW_PAGE_TABLES,
199 * Sometimes a large or cross-page mmio needs to be broken up into separate
200 * exits for userspace servicing.
202 struct kvm_mmio_fragment {
210 #ifdef CONFIG_PREEMPT_NOTIFIERS
211 struct preempt_notifier preempt_notifier;
217 unsigned long requests;
218 unsigned long guest_debug;
224 int guest_fpu_loaded, guest_xcr0_loaded;
225 wait_queue_head_t wq;
229 struct kvm_vcpu_stat stat;
231 #ifdef CONFIG_HAS_IOMEM
233 int mmio_read_completed;
235 int mmio_cur_fragment;
236 int mmio_nr_fragments;
237 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
240 #ifdef CONFIG_KVM_ASYNC_PF
243 struct list_head queue;
244 struct list_head done;
249 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
251 * Cpu relax intercept or pause loop exit optimization
252 * in_spin_loop: set when a vcpu does a pause loop exit
253 * or cpu relax intercepted.
254 * dy_eligible: indicates whether vcpu is eligible for directed yield.
262 struct kvm_vcpu_arch arch;
265 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
267 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
271 * Some of the bitops functions do not support too long bitmaps.
272 * This number must be determined not to exceed such limits.
274 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
276 struct kvm_memory_slot {
278 unsigned long npages;
279 unsigned long *dirty_bitmap;
280 struct kvm_arch_memory_slot arch;
281 unsigned long userspace_addr;
286 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
288 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
291 struct kvm_kernel_irq_routing_entry {
294 int (*set)(struct kvm_kernel_irq_routing_entry *e,
295 struct kvm *kvm, int irq_source_id, int level,
304 struct hlist_node link;
307 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
309 struct kvm_irq_routing_table {
310 int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS];
311 struct kvm_kernel_irq_routing_entry *rt_entries;
314 * Array indexed by gsi. Each entry contains list of irq chips
315 * the gsi is connected to.
317 struct hlist_head map[0];
322 struct kvm_irq_routing_table {};
326 #ifndef KVM_PRIVATE_MEM_SLOTS
327 #define KVM_PRIVATE_MEM_SLOTS 0
330 #ifndef KVM_MEM_SLOTS_NUM
331 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
336 * memslots are not sorted by id anymore, please use id_to_memslot()
337 * to get the memslot by its id.
339 struct kvm_memslots {
341 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
342 /* The mapping table from slot id to the index in memslots[]. */
343 short id_to_index[KVM_MEM_SLOTS_NUM];
348 struct mutex slots_lock;
349 struct mm_struct *mm; /* userspace tied to this vm */
350 struct kvm_memslots *memslots;
351 struct srcu_struct srcu;
352 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
355 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
356 atomic_t online_vcpus;
357 int last_boosted_vcpu;
358 struct list_head vm_list;
360 struct kvm_io_bus *buses[KVM_NR_BUSES];
361 #ifdef CONFIG_HAVE_KVM_EVENTFD
364 struct list_head items;
365 struct list_head resampler_list;
366 struct mutex resampler_lock;
368 struct list_head ioeventfds;
370 struct kvm_vm_stat stat;
371 struct kvm_arch arch;
372 atomic_t users_count;
373 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
374 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
375 spinlock_t ring_lock;
376 struct list_head coalesced_zones;
379 struct mutex irq_lock;
380 #ifdef CONFIG_HAVE_KVM_IRQCHIP
382 * Update side is protected by irq_lock and,
383 * if configured, irqfds.lock.
385 struct kvm_irq_routing_table __rcu *irq_routing;
386 struct hlist_head mask_notifier_list;
387 struct hlist_head irq_ack_notifier_list;
390 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
391 struct mmu_notifier mmu_notifier;
392 unsigned long mmu_notifier_seq;
393 long mmu_notifier_count;
396 struct list_head devices;
399 #define kvm_err(fmt, ...) \
400 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
401 #define kvm_info(fmt, ...) \
402 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
403 #define kvm_debug(fmt, ...) \
404 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
405 #define kvm_pr_unimpl(fmt, ...) \
406 pr_err_ratelimited("kvm [%i]: " fmt, \
407 task_tgid_nr(current), ## __VA_ARGS__)
409 /* The guest did something we don't support. */
410 #define vcpu_unimpl(vcpu, fmt, ...) \
411 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
413 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
416 return kvm->vcpus[i];
419 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
421 idx < atomic_read(&kvm->online_vcpus) && \
422 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
425 #define kvm_for_each_memslot(memslot, slots) \
426 for (memslot = &slots->memslots[0]; \
427 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
430 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
431 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
433 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
434 void vcpu_put(struct kvm_vcpu *vcpu);
436 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
437 int kvm_irqfd_init(void);
438 void kvm_irqfd_exit(void);
440 static inline int kvm_irqfd_init(void)
445 static inline void kvm_irqfd_exit(void)
449 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
450 struct module *module);
453 void kvm_get_kvm(struct kvm *kvm);
454 void kvm_put_kvm(struct kvm *kvm);
455 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new,
456 u64 last_generation);
458 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
460 return rcu_dereference_check(kvm->memslots,
461 srcu_read_lock_held(&kvm->srcu)
462 || lockdep_is_held(&kvm->slots_lock));
465 static inline struct kvm_memory_slot *
466 id_to_memslot(struct kvm_memslots *slots, int id)
468 int index = slots->id_to_index[id];
469 struct kvm_memory_slot *slot;
471 slot = &slots->memslots[index];
473 WARN_ON(slot->id != id);
478 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
479 * - create a new memory slot
480 * - delete an existing memory slot
481 * - modify an existing memory slot
482 * -- move it in the guest physical memory space
483 * -- just change its flags
485 * Since flags can be changed by some of these operations, the following
486 * differentiation is the best we can do for __kvm_set_memory_region():
495 int kvm_set_memory_region(struct kvm *kvm,
496 struct kvm_userspace_memory_region *mem);
497 int __kvm_set_memory_region(struct kvm *kvm,
498 struct kvm_userspace_memory_region *mem);
499 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
500 struct kvm_memory_slot *dont);
501 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
502 int kvm_arch_prepare_memory_region(struct kvm *kvm,
503 struct kvm_memory_slot *memslot,
504 struct kvm_userspace_memory_region *mem,
505 enum kvm_mr_change change);
506 void kvm_arch_commit_memory_region(struct kvm *kvm,
507 struct kvm_userspace_memory_region *mem,
508 const struct kvm_memory_slot *old,
509 enum kvm_mr_change change);
510 bool kvm_largepages_enabled(void);
511 void kvm_disable_largepages(void);
512 /* flush all memory translations */
513 void kvm_arch_flush_shadow_all(struct kvm *kvm);
514 /* flush memory translations pointing to 'slot' */
515 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
516 struct kvm_memory_slot *slot);
518 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
521 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
522 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
523 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
524 void kvm_release_page_clean(struct page *page);
525 void kvm_release_page_dirty(struct page *page);
526 void kvm_set_page_dirty(struct page *page);
527 void kvm_set_page_accessed(struct page *page);
529 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
530 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
531 bool write_fault, bool *writable);
532 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
533 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
535 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
536 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
538 void kvm_release_pfn_dirty(pfn_t pfn);
539 void kvm_release_pfn_clean(pfn_t pfn);
540 void kvm_set_pfn_dirty(pfn_t pfn);
541 void kvm_set_pfn_accessed(pfn_t pfn);
542 void kvm_get_pfn(pfn_t pfn);
544 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
546 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
548 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
549 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
550 void *data, unsigned long len);
551 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
552 int offset, int len);
553 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
555 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
556 void *data, unsigned long len);
557 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
558 gpa_t gpa, unsigned long len);
559 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
560 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
561 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
562 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
563 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
564 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
565 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
568 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
569 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
570 bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
571 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
572 void kvm_resched(struct kvm_vcpu *vcpu);
573 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
574 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
576 void kvm_flush_remote_tlbs(struct kvm *kvm);
577 void kvm_reload_remote_mmus(struct kvm *kvm);
578 void kvm_make_mclock_inprogress_request(struct kvm *kvm);
579 void kvm_make_scan_ioapic_request(struct kvm *kvm);
581 long kvm_arch_dev_ioctl(struct file *filp,
582 unsigned int ioctl, unsigned long arg);
583 long kvm_arch_vcpu_ioctl(struct file *filp,
584 unsigned int ioctl, unsigned long arg);
585 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
587 int kvm_dev_ioctl_check_extension(long ext);
589 int kvm_get_dirty_log(struct kvm *kvm,
590 struct kvm_dirty_log *log, int *is_dirty);
591 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
592 struct kvm_dirty_log *log);
594 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
595 struct kvm_userspace_memory_region *mem);
596 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
598 long kvm_arch_vm_ioctl(struct file *filp,
599 unsigned int ioctl, unsigned long arg);
601 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
602 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
604 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
605 struct kvm_translation *tr);
607 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
608 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
609 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
610 struct kvm_sregs *sregs);
611 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
612 struct kvm_sregs *sregs);
613 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
614 struct kvm_mp_state *mp_state);
615 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
616 struct kvm_mp_state *mp_state);
617 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
618 struct kvm_guest_debug *dbg);
619 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
621 int kvm_arch_init(void *opaque);
622 void kvm_arch_exit(void);
624 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
625 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
627 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
628 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
629 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
630 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
631 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
632 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
633 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
635 int kvm_arch_hardware_enable(void *garbage);
636 void kvm_arch_hardware_disable(void *garbage);
637 int kvm_arch_hardware_setup(void);
638 void kvm_arch_hardware_unsetup(void);
639 void kvm_arch_check_processor_compat(void *rtn);
640 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
641 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
643 void kvm_free_physmem(struct kvm *kvm);
645 void *kvm_kvzalloc(unsigned long size);
646 void kvm_kvfree(const void *addr);
648 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
649 static inline struct kvm *kvm_arch_alloc_vm(void)
651 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
654 static inline void kvm_arch_free_vm(struct kvm *kvm)
660 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
662 #ifdef __KVM_HAVE_ARCH_WQP
663 return vcpu->arch.wqp;
669 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
670 void kvm_arch_destroy_vm(struct kvm *kvm);
671 void kvm_arch_sync_events(struct kvm *kvm);
673 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
674 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
676 bool kvm_is_mmio_pfn(pfn_t pfn);
678 struct kvm_irq_ack_notifier {
679 struct hlist_node link;
681 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
684 struct kvm_assigned_dev_kernel {
685 struct kvm_irq_ack_notifier ack_notifier;
686 struct list_head list;
691 unsigned int entries_nr;
693 bool host_irq_disabled;
695 struct msix_entry *host_msix_entries;
697 struct msix_entry *guest_msix_entries;
698 unsigned long irq_requested_type;
703 spinlock_t intx_lock;
704 spinlock_t intx_mask_lock;
706 struct pci_saved_state *pci_saved_state;
709 struct kvm_irq_mask_notifier {
710 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
712 struct hlist_node link;
715 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
716 struct kvm_irq_mask_notifier *kimn);
717 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
718 struct kvm_irq_mask_notifier *kimn);
719 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
722 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
724 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);
725 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
726 int irq_source_id, int level, bool line_status);
727 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
728 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
729 void kvm_register_irq_ack_notifier(struct kvm *kvm,
730 struct kvm_irq_ack_notifier *kian);
731 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
732 struct kvm_irq_ack_notifier *kian);
733 int kvm_request_irq_source_id(struct kvm *kvm);
734 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
736 /* For vcpu->arch.iommu_flags */
737 #define KVM_IOMMU_CACHE_COHERENCY 0x1
739 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
740 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
741 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
742 int kvm_iommu_map_guest(struct kvm *kvm);
743 int kvm_iommu_unmap_guest(struct kvm *kvm);
744 int kvm_assign_device(struct kvm *kvm,
745 struct kvm_assigned_dev_kernel *assigned_dev);
746 int kvm_deassign_device(struct kvm *kvm,
747 struct kvm_assigned_dev_kernel *assigned_dev);
749 static inline int kvm_iommu_map_pages(struct kvm *kvm,
750 struct kvm_memory_slot *slot)
755 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
756 struct kvm_memory_slot *slot)
760 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
766 static inline void kvm_guest_enter(void)
770 BUG_ON(preemptible());
772 local_irq_save(flags);
774 local_irq_restore(flags);
776 /* KVM does not hold any references to rcu protected data when it
777 * switches CPU into a guest mode. In fact switching to a guest mode
778 * is very similar to exiting to userspase from rcu point of view. In
779 * addition CPU may stay in a guest mode for quite a long time (up to
780 * one time slice). Lets treat guest mode as quiescent state, just like
781 * we do with user-mode execution.
783 rcu_virt_note_context_switch(smp_processor_id());
786 static inline void kvm_guest_exit(void)
790 local_irq_save(flags);
792 local_irq_restore(flags);
796 * search_memslots() and __gfn_to_memslot() are here because they are
797 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
798 * gfn_to_memslot() itself isn't here as an inline because that would
799 * bloat other code too much.
801 static inline struct kvm_memory_slot *
802 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
804 struct kvm_memory_slot *memslot;
806 kvm_for_each_memslot(memslot, slots)
807 if (gfn >= memslot->base_gfn &&
808 gfn < memslot->base_gfn + memslot->npages)
814 static inline struct kvm_memory_slot *
815 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
817 return search_memslots(slots, gfn);
820 static inline unsigned long
821 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
823 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
826 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
828 return gfn_to_memslot(kvm, gfn)->id;
831 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
833 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
834 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
835 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
839 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
841 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
843 return slot->base_gfn + gfn_offset;
846 static inline gpa_t gfn_to_gpa(gfn_t gfn)
848 return (gpa_t)gfn << PAGE_SHIFT;
851 static inline gfn_t gpa_to_gfn(gpa_t gpa)
853 return (gfn_t)(gpa >> PAGE_SHIFT);
856 static inline hpa_t pfn_to_hpa(pfn_t pfn)
858 return (hpa_t)pfn << PAGE_SHIFT;
861 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
863 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
871 struct kvm_stats_debugfs_item {
874 enum kvm_stat_kind kind;
875 struct dentry *dentry;
877 extern struct kvm_stats_debugfs_item debugfs_entries[];
878 extern struct dentry *kvm_debugfs_dir;
880 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
881 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
883 if (unlikely(kvm->mmu_notifier_count))
886 * Ensure the read of mmu_notifier_count happens before the read
887 * of mmu_notifier_seq. This interacts with the smp_wmb() in
888 * mmu_notifier_invalidate_range_end to make sure that the caller
889 * either sees the old (non-zero) value of mmu_notifier_count or
890 * the new (incremented) value of mmu_notifier_seq.
891 * PowerPC Book3s HV KVM calls this under a per-page lock
892 * rather than under kvm->mmu_lock, for scalability, so
893 * can't rely on kvm->mmu_lock to keep things ordered.
896 if (kvm->mmu_notifier_seq != mmu_seq)
902 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
904 #define KVM_MAX_IRQ_ROUTES 1024
906 int kvm_setup_default_irq_routing(struct kvm *kvm);
907 int kvm_set_irq_routing(struct kvm *kvm,
908 const struct kvm_irq_routing_entry *entries,
911 int kvm_set_routing_entry(struct kvm_irq_routing_table *rt,
912 struct kvm_kernel_irq_routing_entry *e,
913 const struct kvm_irq_routing_entry *ue);
914 void kvm_free_irq_routing(struct kvm *kvm);
916 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
920 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
924 #ifdef CONFIG_HAVE_KVM_EVENTFD
926 void kvm_eventfd_init(struct kvm *kvm);
927 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
929 #ifdef CONFIG_HAVE_KVM_IRQCHIP
930 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
931 void kvm_irqfd_release(struct kvm *kvm);
932 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
934 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
939 static inline void kvm_irqfd_release(struct kvm *kvm) {}
944 static inline void kvm_eventfd_init(struct kvm *kvm) {}
946 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
951 static inline void kvm_irqfd_release(struct kvm *kvm) {}
953 #ifdef CONFIG_HAVE_KVM_IRQCHIP
954 static inline void kvm_irq_routing_update(struct kvm *kvm,
955 struct kvm_irq_routing_table *irq_rt)
957 rcu_assign_pointer(kvm->irq_routing, irq_rt);
961 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
966 #endif /* CONFIG_HAVE_KVM_EVENTFD */
968 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
969 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
971 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
974 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
978 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
982 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
984 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
987 void kvm_free_all_assigned_devices(struct kvm *kvm);
991 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
997 static inline void kvm_free_all_assigned_devices(struct kvm *kvm) {}
1001 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1003 set_bit(req, &vcpu->requests);
1006 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1008 if (test_bit(req, &vcpu->requests)) {
1009 clear_bit(req, &vcpu->requests);
1016 extern bool kvm_rebooting;
1018 struct kvm_device_ops;
1021 struct kvm_device_ops *ops;
1024 struct list_head vm_node;
1027 /* create, destroy, and name are mandatory */
1028 struct kvm_device_ops {
1030 int (*create)(struct kvm_device *dev, u32 type);
1033 * Destroy is responsible for freeing dev.
1035 * Destroy may be called before or after destructors are called
1036 * on emulated I/O regions, depending on whether a reference is
1037 * held by a vcpu or other kvm component that gets destroyed
1038 * after the emulated I/O.
1040 void (*destroy)(struct kvm_device *dev);
1042 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1043 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1044 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1045 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1049 void kvm_device_get(struct kvm_device *dev);
1050 void kvm_device_put(struct kvm_device *dev);
1051 struct kvm_device *kvm_device_from_filp(struct file *filp);
1053 extern struct kvm_device_ops kvm_mpic_ops;
1054 extern struct kvm_device_ops kvm_xics_ops;
1056 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1058 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1060 vcpu->spin_loop.in_spin_loop = val;
1062 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1064 vcpu->spin_loop.dy_eligible = val;
1067 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1069 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1073 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1077 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu)
1082 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */