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 <asm/signal.h>
27 #include <linux/kvm.h>
28 #include <linux/kvm_para.h>
30 #include <linux/kvm_types.h>
32 #include <asm/kvm_host.h>
35 #define KVM_MMIO_SIZE 8
39 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
40 * in kvm, other bits are visible for userspace which are defined in
41 * include/linux/kvm_h.
43 #define KVM_MEMSLOT_INVALID (1UL << 16)
46 * If we support unaligned MMIO, at most one fragment will be split into two:
48 #ifdef KVM_UNALIGNED_MMIO
49 # define KVM_EXTRA_MMIO_FRAGMENTS 1
51 # define KVM_EXTRA_MMIO_FRAGMENTS 0
54 #define KVM_USER_MMIO_SIZE 8
56 #define KVM_MAX_MMIO_FRAGMENTS \
57 (KVM_MMIO_SIZE / KVM_USER_MMIO_SIZE + KVM_EXTRA_MMIO_FRAGMENTS)
60 * For the normal pfn, the highest 12 bits should be zero,
61 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
62 * mask bit 63 to indicate the noslot pfn.
64 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
65 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
66 #define KVM_PFN_NOSLOT (0x1ULL << 63)
68 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
69 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
70 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
73 * error pfns indicate that the gfn is in slot but faild to
74 * translate it to pfn on host.
76 static inline bool is_error_pfn(pfn_t pfn)
78 return !!(pfn & KVM_PFN_ERR_MASK);
82 * error_noslot pfns indicate that the gfn can not be
83 * translated to pfn - it is not in slot or failed to
84 * translate it to pfn.
86 static inline bool is_error_noslot_pfn(pfn_t pfn)
88 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
91 /* noslot pfn indicates that the gfn is not in slot. */
92 static inline bool is_noslot_pfn(pfn_t pfn)
94 return pfn == KVM_PFN_NOSLOT;
97 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
98 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
100 static inline bool kvm_is_error_hva(unsigned long addr)
102 return addr >= PAGE_OFFSET;
105 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
107 static inline bool is_error_page(struct page *page)
113 * vcpu->requests bit members
115 #define KVM_REQ_TLB_FLUSH 0
116 #define KVM_REQ_MIGRATE_TIMER 1
117 #define KVM_REQ_REPORT_TPR_ACCESS 2
118 #define KVM_REQ_MMU_RELOAD 3
119 #define KVM_REQ_TRIPLE_FAULT 4
120 #define KVM_REQ_PENDING_TIMER 5
121 #define KVM_REQ_UNHALT 6
122 #define KVM_REQ_MMU_SYNC 7
123 #define KVM_REQ_CLOCK_UPDATE 8
124 #define KVM_REQ_KICK 9
125 #define KVM_REQ_DEACTIVATE_FPU 10
126 #define KVM_REQ_EVENT 11
127 #define KVM_REQ_APF_HALT 12
128 #define KVM_REQ_STEAL_UPDATE 13
129 #define KVM_REQ_NMI 14
130 #define KVM_REQ_IMMEDIATE_EXIT 15
131 #define KVM_REQ_PMU 16
132 #define KVM_REQ_PMI 17
133 #define KVM_REQ_WATCHDOG 18
135 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
136 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
140 extern struct kmem_cache *kvm_vcpu_cache;
142 struct kvm_io_range {
145 struct kvm_io_device *dev;
148 #define NR_IOBUS_DEVS 1000
152 struct kvm_io_range range[];
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.
261 struct kvm_vcpu_arch arch;
264 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
266 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
270 * Some of the bitops functions do not support too long bitmaps.
271 * This number must be determined not to exceed such limits.
273 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
275 struct kvm_memory_slot {
277 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);
303 struct hlist_node link;
306 #ifdef __KVM_HAVE_IOAPIC
308 struct kvm_irq_routing_table {
309 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
310 struct kvm_kernel_irq_routing_entry *rt_entries;
313 * Array indexed by gsi. Each entry contains list of irq chips
314 * the gsi is connected to.
316 struct hlist_head map[0];
321 struct kvm_irq_routing_table {};
325 #ifndef KVM_MEM_SLOTS_NUM
326 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
331 * memslots are not sorted by id anymore, please use id_to_memslot()
332 * to get the memslot by its id.
334 struct kvm_memslots {
336 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
337 /* The mapping table from slot id to the index in memslots[]. */
338 int id_to_index[KVM_MEM_SLOTS_NUM];
343 struct mutex slots_lock;
344 struct mm_struct *mm; /* userspace tied to this vm */
345 struct kvm_memslots *memslots;
346 struct srcu_struct srcu;
347 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
350 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
351 atomic_t online_vcpus;
352 int last_boosted_vcpu;
353 struct list_head vm_list;
355 struct kvm_io_bus *buses[KVM_NR_BUSES];
356 #ifdef CONFIG_HAVE_KVM_EVENTFD
359 struct list_head items;
360 struct list_head resampler_list;
361 struct mutex resampler_lock;
363 struct list_head ioeventfds;
365 struct kvm_vm_stat stat;
366 struct kvm_arch arch;
367 atomic_t users_count;
368 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
369 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
370 spinlock_t ring_lock;
371 struct list_head coalesced_zones;
374 struct mutex irq_lock;
375 #ifdef CONFIG_HAVE_KVM_IRQCHIP
377 * Update side is protected by irq_lock and,
378 * if configured, irqfds.lock.
380 struct kvm_irq_routing_table __rcu *irq_routing;
381 struct hlist_head mask_notifier_list;
382 struct hlist_head irq_ack_notifier_list;
385 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
386 struct mmu_notifier mmu_notifier;
387 unsigned long mmu_notifier_seq;
388 long mmu_notifier_count;
393 #define kvm_err(fmt, ...) \
394 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
395 #define kvm_info(fmt, ...) \
396 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
397 #define kvm_debug(fmt, ...) \
398 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
399 #define kvm_pr_unimpl(fmt, ...) \
400 pr_err_ratelimited("kvm [%i]: " fmt, \
401 task_tgid_nr(current), ## __VA_ARGS__)
403 /* The guest did something we don't support. */
404 #define vcpu_unimpl(vcpu, fmt, ...) \
405 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
407 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
410 return kvm->vcpus[i];
413 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
415 idx < atomic_read(&kvm->online_vcpus) && \
416 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
419 #define kvm_for_each_memslot(memslot, slots) \
420 for (memslot = &slots->memslots[0]; \
421 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
424 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
425 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
427 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
428 void vcpu_put(struct kvm_vcpu *vcpu);
430 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
431 struct module *module);
434 void kvm_get_kvm(struct kvm *kvm);
435 void kvm_put_kvm(struct kvm *kvm);
436 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
438 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
440 return rcu_dereference_check(kvm->memslots,
441 srcu_read_lock_held(&kvm->srcu)
442 || lockdep_is_held(&kvm->slots_lock));
445 static inline struct kvm_memory_slot *
446 id_to_memslot(struct kvm_memslots *slots, int id)
448 int index = slots->id_to_index[id];
449 struct kvm_memory_slot *slot;
451 slot = &slots->memslots[index];
453 WARN_ON(slot->id != id);
457 int kvm_set_memory_region(struct kvm *kvm,
458 struct kvm_userspace_memory_region *mem,
460 int __kvm_set_memory_region(struct kvm *kvm,
461 struct kvm_userspace_memory_region *mem,
463 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
464 struct kvm_memory_slot *dont);
465 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
466 int kvm_arch_prepare_memory_region(struct kvm *kvm,
467 struct kvm_memory_slot *memslot,
468 struct kvm_memory_slot old,
469 struct kvm_userspace_memory_region *mem,
471 void kvm_arch_commit_memory_region(struct kvm *kvm,
472 struct kvm_userspace_memory_region *mem,
473 struct kvm_memory_slot old,
475 bool kvm_largepages_enabled(void);
476 void kvm_disable_largepages(void);
477 /* flush all memory translations */
478 void kvm_arch_flush_shadow_all(struct kvm *kvm);
479 /* flush memory translations pointing to 'slot' */
480 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
481 struct kvm_memory_slot *slot);
483 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
486 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
487 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
488 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
489 void kvm_release_page_clean(struct page *page);
490 void kvm_release_page_dirty(struct page *page);
491 void kvm_set_page_dirty(struct page *page);
492 void kvm_set_page_accessed(struct page *page);
494 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
495 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
496 bool write_fault, bool *writable);
497 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
498 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
500 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
501 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
503 void kvm_release_pfn_dirty(pfn_t pfn);
504 void kvm_release_pfn_clean(pfn_t pfn);
505 void kvm_set_pfn_dirty(pfn_t pfn);
506 void kvm_set_pfn_accessed(pfn_t pfn);
507 void kvm_get_pfn(pfn_t pfn);
509 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
511 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
513 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
514 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
515 void *data, unsigned long len);
516 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
517 int offset, int len);
518 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
520 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
521 void *data, unsigned long len);
522 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
524 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
525 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
526 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
527 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
528 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
529 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
530 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
533 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
534 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
535 bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
536 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
537 void kvm_resched(struct kvm_vcpu *vcpu);
538 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
539 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
541 void kvm_flush_remote_tlbs(struct kvm *kvm);
542 void kvm_reload_remote_mmus(struct kvm *kvm);
544 long kvm_arch_dev_ioctl(struct file *filp,
545 unsigned int ioctl, unsigned long arg);
546 long kvm_arch_vcpu_ioctl(struct file *filp,
547 unsigned int ioctl, unsigned long arg);
548 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
550 int kvm_dev_ioctl_check_extension(long ext);
552 int kvm_get_dirty_log(struct kvm *kvm,
553 struct kvm_dirty_log *log, int *is_dirty);
554 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
555 struct kvm_dirty_log *log);
557 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
559 kvm_userspace_memory_region *mem,
561 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level);
562 long kvm_arch_vm_ioctl(struct file *filp,
563 unsigned int ioctl, unsigned long arg);
565 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
566 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
568 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
569 struct kvm_translation *tr);
571 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
572 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
573 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
574 struct kvm_sregs *sregs);
575 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
576 struct kvm_sregs *sregs);
577 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
578 struct kvm_mp_state *mp_state);
579 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
580 struct kvm_mp_state *mp_state);
581 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
582 struct kvm_guest_debug *dbg);
583 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
585 int kvm_arch_init(void *opaque);
586 void kvm_arch_exit(void);
588 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
589 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
591 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
592 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
593 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
594 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
595 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
596 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
598 int kvm_arch_hardware_enable(void *garbage);
599 void kvm_arch_hardware_disable(void *garbage);
600 int kvm_arch_hardware_setup(void);
601 void kvm_arch_hardware_unsetup(void);
602 void kvm_arch_check_processor_compat(void *rtn);
603 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
604 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
606 void kvm_free_physmem(struct kvm *kvm);
608 void *kvm_kvzalloc(unsigned long size);
609 void kvm_kvfree(const void *addr);
611 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
612 static inline struct kvm *kvm_arch_alloc_vm(void)
614 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
617 static inline void kvm_arch_free_vm(struct kvm *kvm)
623 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
625 #ifdef __KVM_HAVE_ARCH_WQP
626 return vcpu->arch.wqp;
632 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
633 void kvm_arch_destroy_vm(struct kvm *kvm);
634 void kvm_free_all_assigned_devices(struct kvm *kvm);
635 void kvm_arch_sync_events(struct kvm *kvm);
637 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
638 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
640 bool kvm_is_mmio_pfn(pfn_t pfn);
642 struct kvm_irq_ack_notifier {
643 struct hlist_node link;
645 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
648 struct kvm_assigned_dev_kernel {
649 struct kvm_irq_ack_notifier ack_notifier;
650 struct list_head list;
655 unsigned int entries_nr;
657 bool host_irq_disabled;
659 struct msix_entry *host_msix_entries;
661 struct msix_entry *guest_msix_entries;
662 unsigned long irq_requested_type;
667 spinlock_t intx_lock;
668 spinlock_t intx_mask_lock;
670 struct pci_saved_state *pci_saved_state;
673 struct kvm_irq_mask_notifier {
674 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
676 struct hlist_node link;
679 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
680 struct kvm_irq_mask_notifier *kimn);
681 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
682 struct kvm_irq_mask_notifier *kimn);
683 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
686 #ifdef __KVM_HAVE_IOAPIC
687 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
688 union kvm_ioapic_redirect_entry *entry,
689 unsigned long *deliver_bitmask);
691 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
692 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
693 int irq_source_id, int level);
694 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
695 void kvm_register_irq_ack_notifier(struct kvm *kvm,
696 struct kvm_irq_ack_notifier *kian);
697 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
698 struct kvm_irq_ack_notifier *kian);
699 int kvm_request_irq_source_id(struct kvm *kvm);
700 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
702 /* For vcpu->arch.iommu_flags */
703 #define KVM_IOMMU_CACHE_COHERENCY 0x1
705 #ifdef CONFIG_IOMMU_API
706 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
707 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
708 int kvm_iommu_map_guest(struct kvm *kvm);
709 int kvm_iommu_unmap_guest(struct kvm *kvm);
710 int kvm_assign_device(struct kvm *kvm,
711 struct kvm_assigned_dev_kernel *assigned_dev);
712 int kvm_deassign_device(struct kvm *kvm,
713 struct kvm_assigned_dev_kernel *assigned_dev);
714 #else /* CONFIG_IOMMU_API */
715 static inline int kvm_iommu_map_pages(struct kvm *kvm,
716 struct kvm_memory_slot *slot)
721 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
722 struct kvm_memory_slot *slot)
726 static inline int kvm_iommu_map_guest(struct kvm *kvm)
731 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
736 static inline int kvm_assign_device(struct kvm *kvm,
737 struct kvm_assigned_dev_kernel *assigned_dev)
742 static inline int kvm_deassign_device(struct kvm *kvm,
743 struct kvm_assigned_dev_kernel *assigned_dev)
747 #endif /* CONFIG_IOMMU_API */
749 static inline void kvm_guest_enter(void)
751 BUG_ON(preemptible());
752 vtime_account(current);
753 current->flags |= PF_VCPU;
754 /* KVM does not hold any references to rcu protected data when it
755 * switches CPU into a guest mode. In fact switching to a guest mode
756 * is very similar to exiting to userspase from rcu point of view. In
757 * addition CPU may stay in a guest mode for quite a long time (up to
758 * one time slice). Lets treat guest mode as quiescent state, just like
759 * we do with user-mode execution.
761 rcu_virt_note_context_switch(smp_processor_id());
764 static inline void kvm_guest_exit(void)
766 vtime_account(current);
767 current->flags &= ~PF_VCPU;
771 * search_memslots() and __gfn_to_memslot() are here because they are
772 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
773 * gfn_to_memslot() itself isn't here as an inline because that would
774 * bloat other code too much.
776 static inline struct kvm_memory_slot *
777 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
779 struct kvm_memory_slot *memslot;
781 kvm_for_each_memslot(memslot, slots)
782 if (gfn >= memslot->base_gfn &&
783 gfn < memslot->base_gfn + memslot->npages)
789 static inline struct kvm_memory_slot *
790 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
792 return search_memslots(slots, gfn);
795 static inline unsigned long
796 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
798 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
801 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
803 return gfn_to_memslot(kvm, gfn)->id;
806 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
808 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
809 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
810 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
814 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
816 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
818 return slot->base_gfn + gfn_offset;
821 static inline gpa_t gfn_to_gpa(gfn_t gfn)
823 return (gpa_t)gfn << PAGE_SHIFT;
826 static inline gfn_t gpa_to_gfn(gpa_t gpa)
828 return (gfn_t)(gpa >> PAGE_SHIFT);
831 static inline hpa_t pfn_to_hpa(pfn_t pfn)
833 return (hpa_t)pfn << PAGE_SHIFT;
836 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
838 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
846 struct kvm_stats_debugfs_item {
849 enum kvm_stat_kind kind;
850 struct dentry *dentry;
852 extern struct kvm_stats_debugfs_item debugfs_entries[];
853 extern struct dentry *kvm_debugfs_dir;
855 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
856 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
858 if (unlikely(kvm->mmu_notifier_count))
861 * Ensure the read of mmu_notifier_count happens before the read
862 * of mmu_notifier_seq. This interacts with the smp_wmb() in
863 * mmu_notifier_invalidate_range_end to make sure that the caller
864 * either sees the old (non-zero) value of mmu_notifier_count or
865 * the new (incremented) value of mmu_notifier_seq.
866 * PowerPC Book3s HV KVM calls this under a per-page lock
867 * rather than under kvm->mmu_lock, for scalability, so
868 * can't rely on kvm->mmu_lock to keep things ordered.
871 if (kvm->mmu_notifier_seq != mmu_seq)
877 #ifdef KVM_CAP_IRQ_ROUTING
879 #define KVM_MAX_IRQ_ROUTES 1024
881 int kvm_setup_default_irq_routing(struct kvm *kvm);
882 int kvm_set_irq_routing(struct kvm *kvm,
883 const struct kvm_irq_routing_entry *entries,
886 void kvm_free_irq_routing(struct kvm *kvm);
888 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
892 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
896 #ifdef CONFIG_HAVE_KVM_EVENTFD
898 void kvm_eventfd_init(struct kvm *kvm);
899 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
900 void kvm_irqfd_release(struct kvm *kvm);
901 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
902 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
906 static inline void kvm_eventfd_init(struct kvm *kvm) {}
908 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
913 static inline void kvm_irqfd_release(struct kvm *kvm) {}
915 #ifdef CONFIG_HAVE_KVM_IRQCHIP
916 static inline void kvm_irq_routing_update(struct kvm *kvm,
917 struct kvm_irq_routing_table *irq_rt)
919 rcu_assign_pointer(kvm->irq_routing, irq_rt);
923 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
928 #endif /* CONFIG_HAVE_KVM_EVENTFD */
930 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
931 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
933 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
936 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
940 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
944 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
946 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
951 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
959 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
961 set_bit(req, &vcpu->requests);
964 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
966 if (test_bit(req, &vcpu->requests)) {
967 clear_bit(req, &vcpu->requests);
974 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
976 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
978 vcpu->spin_loop.in_spin_loop = val;
980 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
982 vcpu->spin_loop.dy_eligible = val;
985 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
987 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
991 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
995 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu)
1000 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */