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
129 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
130 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
134 extern struct kmem_cache *kvm_vcpu_cache;
136 extern spinlock_t kvm_lock;
137 extern struct list_head vm_list;
139 struct kvm_io_range {
142 struct kvm_io_device *dev;
145 #define NR_IOBUS_DEVS 1000
149 struct kvm_io_range range[];
155 KVM_VIRTIO_CCW_NOTIFY_BUS,
159 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
160 int len, const void *val);
161 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
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;
221 int guest_fpu_loaded, guest_xcr0_loaded;
222 wait_queue_head_t wq;
226 struct kvm_vcpu_stat stat;
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_kernel_irq_routing_entry {
291 int (*set)(struct kvm_kernel_irq_routing_entry *e,
292 struct kvm *kvm, int irq_source_id, int level,
301 struct hlist_node link;
304 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
306 struct kvm_irq_routing_table {
307 int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS];
308 struct kvm_kernel_irq_routing_entry *rt_entries;
311 * Array indexed by gsi. Each entry contains list of irq chips
312 * the gsi is connected to.
314 struct hlist_head map[0];
319 struct kvm_irq_routing_table {};
323 #ifndef KVM_PRIVATE_MEM_SLOTS
324 #define KVM_PRIVATE_MEM_SLOTS 0
327 #ifndef KVM_MEM_SLOTS_NUM
328 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
333 * memslots are not sorted by id anymore, please use id_to_memslot()
334 * to get the memslot by its id.
336 struct kvm_memslots {
338 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
339 /* The mapping table from slot id to the index in memslots[]. */
340 short id_to_index[KVM_MEM_SLOTS_NUM];
345 struct mutex slots_lock;
346 struct mm_struct *mm; /* userspace tied to this vm */
347 struct kvm_memslots *memslots;
348 struct srcu_struct srcu;
349 struct srcu_struct irq_srcu;
350 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
353 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
354 atomic_t online_vcpus;
355 int last_boosted_vcpu;
356 struct list_head vm_list;
358 struct kvm_io_bus *buses[KVM_NR_BUSES];
359 #ifdef CONFIG_HAVE_KVM_EVENTFD
362 struct list_head items;
363 struct list_head resampler_list;
364 struct mutex resampler_lock;
366 struct list_head ioeventfds;
368 struct kvm_vm_stat stat;
369 struct kvm_arch arch;
370 atomic_t users_count;
371 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
372 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
373 spinlock_t ring_lock;
374 struct list_head coalesced_zones;
377 struct mutex irq_lock;
378 #ifdef CONFIG_HAVE_KVM_IRQCHIP
380 * Update side is protected by irq_lock and,
381 * if configured, irqfds.lock.
383 struct kvm_irq_routing_table __rcu *irq_routing;
384 struct hlist_head mask_notifier_list;
385 struct hlist_head irq_ack_notifier_list;
388 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
389 struct mmu_notifier mmu_notifier;
390 unsigned long mmu_notifier_seq;
391 long mmu_notifier_count;
394 struct list_head devices;
397 #define kvm_err(fmt, ...) \
398 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
399 #define kvm_info(fmt, ...) \
400 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
401 #define kvm_debug(fmt, ...) \
402 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
403 #define kvm_pr_unimpl(fmt, ...) \
404 pr_err_ratelimited("kvm [%i]: " fmt, \
405 task_tgid_nr(current), ## __VA_ARGS__)
407 /* The guest did something we don't support. */
408 #define vcpu_unimpl(vcpu, fmt, ...) \
409 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
411 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
414 return kvm->vcpus[i];
417 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
419 idx < atomic_read(&kvm->online_vcpus) && \
420 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
423 #define kvm_for_each_memslot(memslot, slots) \
424 for (memslot = &slots->memslots[0]; \
425 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
428 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
429 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
431 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
432 void vcpu_put(struct kvm_vcpu *vcpu);
434 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
435 int kvm_irqfd_init(void);
436 void kvm_irqfd_exit(void);
438 static inline int kvm_irqfd_init(void)
443 static inline void kvm_irqfd_exit(void)
447 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
448 struct module *module);
451 void kvm_get_kvm(struct kvm *kvm);
452 void kvm_put_kvm(struct kvm *kvm);
454 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
456 return rcu_dereference_check(kvm->memslots,
457 srcu_read_lock_held(&kvm->srcu)
458 || lockdep_is_held(&kvm->slots_lock));
461 static inline struct kvm_memory_slot *
462 id_to_memslot(struct kvm_memslots *slots, int id)
464 int index = slots->id_to_index[id];
465 struct kvm_memory_slot *slot;
467 slot = &slots->memslots[index];
469 WARN_ON(slot->id != id);
474 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
475 * - create a new memory slot
476 * - delete an existing memory slot
477 * - modify an existing memory slot
478 * -- move it in the guest physical memory space
479 * -- just change its flags
481 * Since flags can be changed by some of these operations, the following
482 * differentiation is the best we can do for __kvm_set_memory_region():
491 int kvm_set_memory_region(struct kvm *kvm,
492 struct kvm_userspace_memory_region *mem);
493 int __kvm_set_memory_region(struct kvm *kvm,
494 struct kvm_userspace_memory_region *mem);
495 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
496 struct kvm_memory_slot *dont);
497 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
498 unsigned long npages);
499 void kvm_arch_memslots_updated(struct kvm *kvm);
500 int kvm_arch_prepare_memory_region(struct kvm *kvm,
501 struct kvm_memory_slot *memslot,
502 struct kvm_userspace_memory_region *mem,
503 enum kvm_mr_change change);
504 void kvm_arch_commit_memory_region(struct kvm *kvm,
505 struct kvm_userspace_memory_region *mem,
506 const struct kvm_memory_slot *old,
507 enum kvm_mr_change change);
508 bool kvm_largepages_enabled(void);
509 void kvm_disable_largepages(void);
510 /* flush all memory translations */
511 void kvm_arch_flush_shadow_all(struct kvm *kvm);
512 /* flush memory translations pointing to 'slot' */
513 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
514 struct kvm_memory_slot *slot);
516 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
519 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
520 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
521 unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable);
522 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
523 void kvm_release_page_clean(struct page *page);
524 void kvm_release_page_dirty(struct page *page);
525 void kvm_set_page_accessed(struct page *page);
527 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
528 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
529 bool write_fault, bool *writable);
530 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
531 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
533 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
534 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
536 void kvm_release_pfn_clean(pfn_t pfn);
537 void kvm_set_pfn_dirty(pfn_t pfn);
538 void kvm_set_pfn_accessed(pfn_t pfn);
539 void kvm_get_pfn(pfn_t pfn);
541 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
543 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
545 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
546 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
547 void *data, unsigned long len);
548 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
549 int offset, int len);
550 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
552 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
553 void *data, unsigned long len);
554 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
555 gpa_t gpa, unsigned long len);
556 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
557 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
558 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
559 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
560 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
561 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
563 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
564 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
565 bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
566 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
567 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
568 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
570 void kvm_flush_remote_tlbs(struct kvm *kvm);
571 void kvm_reload_remote_mmus(struct kvm *kvm);
572 void kvm_make_mclock_inprogress_request(struct kvm *kvm);
573 void kvm_make_scan_ioapic_request(struct kvm *kvm);
575 long kvm_arch_dev_ioctl(struct file *filp,
576 unsigned int ioctl, unsigned long arg);
577 long kvm_arch_vcpu_ioctl(struct file *filp,
578 unsigned int ioctl, unsigned long arg);
579 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
581 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext);
583 int kvm_get_dirty_log(struct kvm *kvm,
584 struct kvm_dirty_log *log, int *is_dirty);
585 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
586 struct kvm_dirty_log *log);
588 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
590 long kvm_arch_vm_ioctl(struct file *filp,
591 unsigned int ioctl, unsigned long arg);
593 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
594 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
596 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
597 struct kvm_translation *tr);
599 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
600 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
601 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
602 struct kvm_sregs *sregs);
603 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
604 struct kvm_sregs *sregs);
605 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
606 struct kvm_mp_state *mp_state);
607 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
608 struct kvm_mp_state *mp_state);
609 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
610 struct kvm_guest_debug *dbg);
611 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
613 int kvm_arch_init(void *opaque);
614 void kvm_arch_exit(void);
616 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
617 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
619 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
620 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
621 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
622 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
623 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
624 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
625 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
627 int kvm_arch_hardware_enable(void *garbage);
628 void kvm_arch_hardware_disable(void *garbage);
629 int kvm_arch_hardware_setup(void);
630 void kvm_arch_hardware_unsetup(void);
631 void kvm_arch_check_processor_compat(void *rtn);
632 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
633 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
635 void *kvm_kvzalloc(unsigned long size);
636 void kvm_kvfree(const void *addr);
638 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
639 static inline struct kvm *kvm_arch_alloc_vm(void)
641 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
644 static inline void kvm_arch_free_vm(struct kvm *kvm)
650 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
652 #ifdef __KVM_HAVE_ARCH_WQP
653 return vcpu->arch.wqp;
659 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
660 void kvm_arch_destroy_vm(struct kvm *kvm);
661 void kvm_arch_sync_events(struct kvm *kvm);
663 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
664 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
666 bool kvm_is_mmio_pfn(pfn_t pfn);
668 struct kvm_irq_ack_notifier {
669 struct hlist_node link;
671 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
674 struct kvm_assigned_dev_kernel {
675 struct kvm_irq_ack_notifier ack_notifier;
676 struct list_head list;
681 unsigned int entries_nr;
683 bool host_irq_disabled;
685 struct msix_entry *host_msix_entries;
687 struct msix_entry *guest_msix_entries;
688 unsigned long irq_requested_type;
693 spinlock_t intx_lock;
694 spinlock_t intx_mask_lock;
696 struct pci_saved_state *pci_saved_state;
699 struct kvm_irq_mask_notifier {
700 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
702 struct hlist_node link;
705 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
706 struct kvm_irq_mask_notifier *kimn);
707 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
708 struct kvm_irq_mask_notifier *kimn);
709 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
712 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
714 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);
715 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
716 int irq_source_id, int level, bool line_status);
717 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
718 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
719 void kvm_register_irq_ack_notifier(struct kvm *kvm,
720 struct kvm_irq_ack_notifier *kian);
721 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
722 struct kvm_irq_ack_notifier *kian);
723 int kvm_request_irq_source_id(struct kvm *kvm);
724 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
726 /* For vcpu->arch.iommu_flags */
727 #define KVM_IOMMU_CACHE_COHERENCY 0x1
729 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
730 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
731 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
732 int kvm_iommu_map_guest(struct kvm *kvm);
733 int kvm_iommu_unmap_guest(struct kvm *kvm);
734 int kvm_assign_device(struct kvm *kvm,
735 struct kvm_assigned_dev_kernel *assigned_dev);
736 int kvm_deassign_device(struct kvm *kvm,
737 struct kvm_assigned_dev_kernel *assigned_dev);
739 static inline int kvm_iommu_map_pages(struct kvm *kvm,
740 struct kvm_memory_slot *slot)
745 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
746 struct kvm_memory_slot *slot)
750 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
756 static inline void kvm_guest_enter(void)
760 BUG_ON(preemptible());
762 local_irq_save(flags);
764 local_irq_restore(flags);
766 /* KVM does not hold any references to rcu protected data when it
767 * switches CPU into a guest mode. In fact switching to a guest mode
768 * is very similar to exiting to userspace from rcu point of view. In
769 * addition CPU may stay in a guest mode for quite a long time (up to
770 * one time slice). Lets treat guest mode as quiescent state, just like
771 * we do with user-mode execution.
773 rcu_virt_note_context_switch(smp_processor_id());
776 static inline void kvm_guest_exit(void)
780 local_irq_save(flags);
782 local_irq_restore(flags);
786 * search_memslots() and __gfn_to_memslot() are here because they are
787 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
788 * gfn_to_memslot() itself isn't here as an inline because that would
789 * bloat other code too much.
791 static inline struct kvm_memory_slot *
792 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
794 struct kvm_memory_slot *memslot;
796 kvm_for_each_memslot(memslot, slots)
797 if (gfn >= memslot->base_gfn &&
798 gfn < memslot->base_gfn + memslot->npages)
804 static inline struct kvm_memory_slot *
805 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
807 return search_memslots(slots, gfn);
810 static inline unsigned long
811 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
813 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
816 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
818 return gfn_to_memslot(kvm, gfn)->id;
822 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
824 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
826 return slot->base_gfn + gfn_offset;
829 static inline gpa_t gfn_to_gpa(gfn_t gfn)
831 return (gpa_t)gfn << PAGE_SHIFT;
834 static inline gfn_t gpa_to_gfn(gpa_t gpa)
836 return (gfn_t)(gpa >> PAGE_SHIFT);
839 static inline hpa_t pfn_to_hpa(pfn_t pfn)
841 return (hpa_t)pfn << PAGE_SHIFT;
844 static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa)
846 unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
848 return kvm_is_error_hva(hva);
851 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
853 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
861 struct kvm_stats_debugfs_item {
864 enum kvm_stat_kind kind;
865 struct dentry *dentry;
867 extern struct kvm_stats_debugfs_item debugfs_entries[];
868 extern struct dentry *kvm_debugfs_dir;
870 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
871 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
873 if (unlikely(kvm->mmu_notifier_count))
876 * Ensure the read of mmu_notifier_count happens before the read
877 * of mmu_notifier_seq. This interacts with the smp_wmb() in
878 * mmu_notifier_invalidate_range_end to make sure that the caller
879 * either sees the old (non-zero) value of mmu_notifier_count or
880 * the new (incremented) value of mmu_notifier_seq.
881 * PowerPC Book3s HV KVM calls this under a per-page lock
882 * rather than under kvm->mmu_lock, for scalability, so
883 * can't rely on kvm->mmu_lock to keep things ordered.
886 if (kvm->mmu_notifier_seq != mmu_seq)
892 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
894 #define KVM_MAX_IRQ_ROUTES 1024
896 int kvm_setup_default_irq_routing(struct kvm *kvm);
897 int kvm_set_irq_routing(struct kvm *kvm,
898 const struct kvm_irq_routing_entry *entries,
901 int kvm_set_routing_entry(struct kvm_irq_routing_table *rt,
902 struct kvm_kernel_irq_routing_entry *e,
903 const struct kvm_irq_routing_entry *ue);
904 void kvm_free_irq_routing(struct kvm *kvm);
906 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
910 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
914 #ifdef CONFIG_HAVE_KVM_EVENTFD
916 void kvm_eventfd_init(struct kvm *kvm);
917 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
919 #ifdef CONFIG_HAVE_KVM_IRQCHIP
920 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
921 void kvm_irqfd_release(struct kvm *kvm);
922 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
924 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
929 static inline void kvm_irqfd_release(struct kvm *kvm) {}
934 static inline void kvm_eventfd_init(struct kvm *kvm) {}
936 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
941 static inline void kvm_irqfd_release(struct kvm *kvm) {}
943 #ifdef CONFIG_HAVE_KVM_IRQCHIP
944 static inline void kvm_irq_routing_update(struct kvm *kvm,
945 struct kvm_irq_routing_table *irq_rt)
947 rcu_assign_pointer(kvm->irq_routing, irq_rt);
951 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
956 #endif /* CONFIG_HAVE_KVM_EVENTFD */
958 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
959 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
961 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
964 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
968 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
972 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
974 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
977 void kvm_free_all_assigned_devices(struct kvm *kvm);
981 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
987 static inline void kvm_free_all_assigned_devices(struct kvm *kvm) {}
991 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
993 set_bit(req, &vcpu->requests);
996 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
998 if (test_bit(req, &vcpu->requests)) {
999 clear_bit(req, &vcpu->requests);
1006 extern bool kvm_rebooting;
1008 struct kvm_device_ops;
1011 struct kvm_device_ops *ops;
1014 struct list_head vm_node;
1017 /* create, destroy, and name are mandatory */
1018 struct kvm_device_ops {
1020 int (*create)(struct kvm_device *dev, u32 type);
1023 * Destroy is responsible for freeing dev.
1025 * Destroy may be called before or after destructors are called
1026 * on emulated I/O regions, depending on whether a reference is
1027 * held by a vcpu or other kvm component that gets destroyed
1028 * after the emulated I/O.
1030 void (*destroy)(struct kvm_device *dev);
1032 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1033 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1034 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1035 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1039 void kvm_device_get(struct kvm_device *dev);
1040 void kvm_device_put(struct kvm_device *dev);
1041 struct kvm_device *kvm_device_from_filp(struct file *filp);
1043 extern struct kvm_device_ops kvm_mpic_ops;
1044 extern struct kvm_device_ops kvm_xics_ops;
1045 extern struct kvm_device_ops kvm_vfio_ops;
1046 extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
1048 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1050 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1052 vcpu->spin_loop.in_spin_loop = val;
1054 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1056 vcpu->spin_loop.dy_eligible = val;
1059 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1061 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1065 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1068 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */