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;
89 * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390)
90 * provide own defines and kvm_is_error_hva
92 #ifndef KVM_HVA_ERR_BAD
94 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
95 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
97 static inline bool kvm_is_error_hva(unsigned long addr)
99 return addr >= PAGE_OFFSET;
104 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
106 static inline bool is_error_page(struct page *page)
112 * vcpu->requests bit members
114 #define KVM_REQ_TLB_FLUSH 0
115 #define KVM_REQ_MIGRATE_TIMER 1
116 #define KVM_REQ_REPORT_TPR_ACCESS 2
117 #define KVM_REQ_MMU_RELOAD 3
118 #define KVM_REQ_TRIPLE_FAULT 4
119 #define KVM_REQ_PENDING_TIMER 5
120 #define KVM_REQ_UNHALT 6
121 #define KVM_REQ_MMU_SYNC 7
122 #define KVM_REQ_CLOCK_UPDATE 8
123 #define KVM_REQ_KICK 9
124 #define KVM_REQ_DEACTIVATE_FPU 10
125 #define KVM_REQ_EVENT 11
126 #define KVM_REQ_APF_HALT 12
127 #define KVM_REQ_STEAL_UPDATE 13
128 #define KVM_REQ_NMI 14
129 #define KVM_REQ_PMU 15
130 #define KVM_REQ_PMI 16
131 #define KVM_REQ_WATCHDOG 17
132 #define KVM_REQ_MASTERCLOCK_UPDATE 18
133 #define KVM_REQ_MCLOCK_INPROGRESS 19
134 #define KVM_REQ_EPR_EXIT 20
135 #define KVM_REQ_SCAN_IOAPIC 21
136 #define KVM_REQ_GLOBAL_CLOCK_UPDATE 22
137 #define KVM_REQ_ENABLE_IBS 23
138 #define KVM_REQ_DISABLE_IBS 24
140 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
141 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
143 extern struct kmem_cache *kvm_vcpu_cache;
145 extern spinlock_t kvm_lock;
146 extern struct list_head vm_list;
148 struct kvm_io_range {
151 struct kvm_io_device *dev;
154 #define NR_IOBUS_DEVS 1000
159 struct kvm_io_range range[];
165 KVM_VIRTIO_CCW_NOTIFY_BUS,
170 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
171 int len, const void *val);
172 int kvm_io_bus_write_cookie(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
173 int len, const void *val, long cookie);
174 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
176 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
177 int len, struct kvm_io_device *dev);
178 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
179 struct kvm_io_device *dev);
181 #ifdef CONFIG_KVM_ASYNC_PF
182 struct kvm_async_pf {
183 struct work_struct work;
184 struct list_head link;
185 struct list_head queue;
186 struct kvm_vcpu *vcpu;
187 struct mm_struct *mm;
190 struct kvm_arch_async_pf arch;
194 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
195 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
196 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva,
197 struct kvm_arch_async_pf *arch);
198 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
202 * Carry out a gup that requires IO. Allow the mm to relinquish the mmap
203 * semaphore if the filemap/swap has to wait on a page lock. pagep == NULL
204 * controls whether we retry the gup one more time to completion in that case.
205 * Typically this is called after a FAULT_FLAG_RETRY_NOWAIT in the main tdp
208 int kvm_get_user_page_io(struct task_struct *tsk, struct mm_struct *mm,
209 unsigned long addr, bool write_fault,
210 struct page **pagep);
216 READING_SHADOW_PAGE_TABLES,
220 * Sometimes a large or cross-page mmio needs to be broken up into separate
221 * exits for userspace servicing.
223 struct kvm_mmio_fragment {
231 #ifdef CONFIG_PREEMPT_NOTIFIERS
232 struct preempt_notifier preempt_notifier;
238 unsigned long requests;
239 unsigned long guest_debug;
245 int guest_fpu_loaded, guest_xcr0_loaded;
246 wait_queue_head_t wq;
250 struct kvm_vcpu_stat stat;
252 #ifdef CONFIG_HAS_IOMEM
254 int mmio_read_completed;
256 int mmio_cur_fragment;
257 int mmio_nr_fragments;
258 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
261 #ifdef CONFIG_KVM_ASYNC_PF
264 struct list_head queue;
265 struct list_head done;
270 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
272 * Cpu relax intercept or pause loop exit optimization
273 * in_spin_loop: set when a vcpu does a pause loop exit
274 * or cpu relax intercepted.
275 * dy_eligible: indicates whether vcpu is eligible for directed yield.
283 struct kvm_vcpu_arch arch;
286 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
288 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
292 * Some of the bitops functions do not support too long bitmaps.
293 * This number must be determined not to exceed such limits.
295 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
297 struct kvm_memory_slot {
299 unsigned long npages;
300 unsigned long *dirty_bitmap;
301 struct kvm_arch_memory_slot arch;
302 unsigned long userspace_addr;
307 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
309 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
312 struct kvm_s390_adapter_int {
320 struct kvm_kernel_irq_routing_entry {
323 int (*set)(struct kvm_kernel_irq_routing_entry *e,
324 struct kvm *kvm, int irq_source_id, int level,
332 struct kvm_s390_adapter_int adapter;
334 struct hlist_node link;
337 #ifndef KVM_PRIVATE_MEM_SLOTS
338 #define KVM_PRIVATE_MEM_SLOTS 0
341 #ifndef KVM_MEM_SLOTS_NUM
342 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
347 * memslots are not sorted by id anymore, please use id_to_memslot()
348 * to get the memslot by its id.
350 struct kvm_memslots {
352 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
353 /* The mapping table from slot id to the index in memslots[]. */
354 short id_to_index[KVM_MEM_SLOTS_NUM];
359 struct mutex slots_lock;
360 struct mm_struct *mm; /* userspace tied to this vm */
361 struct kvm_memslots *memslots;
362 struct srcu_struct srcu;
363 struct srcu_struct irq_srcu;
364 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
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;
397 struct hlist_head mask_notifier_list;
399 #ifdef CONFIG_HAVE_KVM_IRQFD
400 struct hlist_head irq_ack_notifier_list;
403 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
404 struct mmu_notifier mmu_notifier;
405 unsigned long mmu_notifier_seq;
406 long mmu_notifier_count;
409 struct list_head devices;
412 #define kvm_err(fmt, ...) \
413 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
414 #define kvm_info(fmt, ...) \
415 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
416 #define kvm_debug(fmt, ...) \
417 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
418 #define kvm_pr_unimpl(fmt, ...) \
419 pr_err_ratelimited("kvm [%i]: " fmt, \
420 task_tgid_nr(current), ## __VA_ARGS__)
422 /* The guest did something we don't support. */
423 #define vcpu_unimpl(vcpu, fmt, ...) \
424 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
426 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
429 return kvm->vcpus[i];
432 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
434 idx < atomic_read(&kvm->online_vcpus) && \
435 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
438 #define kvm_for_each_memslot(memslot, slots) \
439 for (memslot = &slots->memslots[0]; \
440 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
443 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
444 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
446 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
447 void vcpu_put(struct kvm_vcpu *vcpu);
449 #ifdef CONFIG_HAVE_KVM_IRQFD
450 int kvm_irqfd_init(void);
451 void kvm_irqfd_exit(void);
453 static inline int kvm_irqfd_init(void)
458 static inline void kvm_irqfd_exit(void)
462 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
463 struct module *module);
466 void kvm_get_kvm(struct kvm *kvm);
467 void kvm_put_kvm(struct kvm *kvm);
469 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
471 return rcu_dereference_check(kvm->memslots,
472 srcu_read_lock_held(&kvm->srcu)
473 || lockdep_is_held(&kvm->slots_lock));
476 static inline struct kvm_memory_slot *
477 id_to_memslot(struct kvm_memslots *slots, int id)
479 int index = slots->id_to_index[id];
480 struct kvm_memory_slot *slot;
482 slot = &slots->memslots[index];
484 WARN_ON(slot->id != id);
489 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
490 * - create a new memory slot
491 * - delete an existing memory slot
492 * - modify an existing memory slot
493 * -- move it in the guest physical memory space
494 * -- just change its flags
496 * Since flags can be changed by some of these operations, the following
497 * differentiation is the best we can do for __kvm_set_memory_region():
506 int kvm_set_memory_region(struct kvm *kvm,
507 struct kvm_userspace_memory_region *mem);
508 int __kvm_set_memory_region(struct kvm *kvm,
509 struct kvm_userspace_memory_region *mem);
510 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
511 struct kvm_memory_slot *dont);
512 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
513 unsigned long npages);
514 void kvm_arch_memslots_updated(struct kvm *kvm);
515 int kvm_arch_prepare_memory_region(struct kvm *kvm,
516 struct kvm_memory_slot *memslot,
517 struct kvm_userspace_memory_region *mem,
518 enum kvm_mr_change change);
519 void kvm_arch_commit_memory_region(struct kvm *kvm,
520 struct kvm_userspace_memory_region *mem,
521 const struct kvm_memory_slot *old,
522 enum kvm_mr_change change);
523 bool kvm_largepages_enabled(void);
524 void kvm_disable_largepages(void);
525 /* flush all memory translations */
526 void kvm_arch_flush_shadow_all(struct kvm *kvm);
527 /* flush memory translations pointing to 'slot' */
528 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
529 struct kvm_memory_slot *slot);
531 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
534 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
535 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
536 unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable);
537 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
538 void kvm_release_page_clean(struct page *page);
539 void kvm_release_page_dirty(struct page *page);
540 void kvm_set_page_accessed(struct page *page);
542 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
543 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
544 bool write_fault, bool *writable);
545 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
546 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
548 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
549 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
551 void kvm_release_pfn_clean(pfn_t pfn);
552 void kvm_set_pfn_dirty(pfn_t pfn);
553 void kvm_set_pfn_accessed(pfn_t pfn);
554 void kvm_get_pfn(pfn_t pfn);
556 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
558 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
560 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
561 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
562 void *data, unsigned long len);
563 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
564 int offset, int len);
565 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
567 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
568 void *data, unsigned long len);
569 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
570 gpa_t gpa, unsigned long len);
571 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
572 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
573 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
574 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
575 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
576 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
578 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
579 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
580 int kvm_vcpu_yield_to(struct kvm_vcpu *target);
581 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
582 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
583 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
585 void kvm_flush_remote_tlbs(struct kvm *kvm);
586 void kvm_reload_remote_mmus(struct kvm *kvm);
587 void kvm_make_mclock_inprogress_request(struct kvm *kvm);
588 void kvm_make_scan_ioapic_request(struct kvm *kvm);
590 long kvm_arch_dev_ioctl(struct file *filp,
591 unsigned int ioctl, unsigned long arg);
592 long kvm_arch_vcpu_ioctl(struct file *filp,
593 unsigned int ioctl, unsigned long arg);
594 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
596 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext);
598 int kvm_get_dirty_log(struct kvm *kvm,
599 struct kvm_dirty_log *log, int *is_dirty);
600 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
601 struct kvm_dirty_log *log);
603 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
605 long kvm_arch_vm_ioctl(struct file *filp,
606 unsigned int ioctl, unsigned long arg);
608 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
609 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
611 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
612 struct kvm_translation *tr);
614 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
615 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
616 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
617 struct kvm_sregs *sregs);
618 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
619 struct kvm_sregs *sregs);
620 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
621 struct kvm_mp_state *mp_state);
622 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
623 struct kvm_mp_state *mp_state);
624 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
625 struct kvm_guest_debug *dbg);
626 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
628 int kvm_arch_init(void *opaque);
629 void kvm_arch_exit(void);
631 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
632 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
634 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);
636 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
637 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
638 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
639 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
640 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
641 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
642 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
644 int kvm_arch_hardware_enable(void);
645 void kvm_arch_hardware_disable(void);
646 int kvm_arch_hardware_setup(void);
647 void kvm_arch_hardware_unsetup(void);
648 void kvm_arch_check_processor_compat(void *rtn);
649 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
650 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
652 void *kvm_kvzalloc(unsigned long size);
653 void kvm_kvfree(const void *addr);
655 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
656 static inline struct kvm *kvm_arch_alloc_vm(void)
658 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
661 static inline void kvm_arch_free_vm(struct kvm *kvm)
667 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
668 void kvm_arch_register_noncoherent_dma(struct kvm *kvm);
669 void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm);
670 bool kvm_arch_has_noncoherent_dma(struct kvm *kvm);
672 static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm)
676 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm)
680 static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
686 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
688 #ifdef __KVM_HAVE_ARCH_WQP
689 return vcpu->arch.wqp;
695 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
696 void kvm_arch_destroy_vm(struct kvm *kvm);
697 void kvm_arch_sync_events(struct kvm *kvm);
699 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
700 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
702 bool kvm_is_mmio_pfn(pfn_t pfn);
704 struct kvm_irq_ack_notifier {
705 struct hlist_node link;
707 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
710 struct kvm_assigned_dev_kernel {
711 struct kvm_irq_ack_notifier ack_notifier;
712 struct list_head list;
717 unsigned int entries_nr;
719 bool host_irq_disabled;
721 struct msix_entry *host_msix_entries;
723 struct msix_entry *guest_msix_entries;
724 unsigned long irq_requested_type;
729 spinlock_t intx_lock;
730 spinlock_t intx_mask_lock;
732 struct pci_saved_state *pci_saved_state;
735 struct kvm_irq_mask_notifier {
736 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
738 struct hlist_node link;
741 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
742 struct kvm_irq_mask_notifier *kimn);
743 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
744 struct kvm_irq_mask_notifier *kimn);
745 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
748 int kvm_irq_map_gsi(struct kvm *kvm,
749 struct kvm_kernel_irq_routing_entry *entries, int gsi);
750 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin);
752 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
754 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);
755 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
756 int irq_source_id, int level, bool line_status);
757 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
758 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
759 void kvm_register_irq_ack_notifier(struct kvm *kvm,
760 struct kvm_irq_ack_notifier *kian);
761 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
762 struct kvm_irq_ack_notifier *kian);
763 int kvm_request_irq_source_id(struct kvm *kvm);
764 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
766 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
767 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
768 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
769 int kvm_iommu_map_guest(struct kvm *kvm);
770 int kvm_iommu_unmap_guest(struct kvm *kvm);
771 int kvm_assign_device(struct kvm *kvm,
772 struct kvm_assigned_dev_kernel *assigned_dev);
773 int kvm_deassign_device(struct kvm *kvm,
774 struct kvm_assigned_dev_kernel *assigned_dev);
776 static inline int kvm_iommu_map_pages(struct kvm *kvm,
777 struct kvm_memory_slot *slot)
782 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
783 struct kvm_memory_slot *slot)
787 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
793 static inline void kvm_guest_enter(void)
797 BUG_ON(preemptible());
799 local_irq_save(flags);
801 local_irq_restore(flags);
803 /* KVM does not hold any references to rcu protected data when it
804 * switches CPU into a guest mode. In fact switching to a guest mode
805 * is very similar to exiting to userspace from rcu point of view. In
806 * addition CPU may stay in a guest mode for quite a long time (up to
807 * one time slice). Lets treat guest mode as quiescent state, just like
808 * we do with user-mode execution.
810 rcu_virt_note_context_switch(smp_processor_id());
813 static inline void kvm_guest_exit(void)
817 local_irq_save(flags);
819 local_irq_restore(flags);
823 * search_memslots() and __gfn_to_memslot() are here because they are
824 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
825 * gfn_to_memslot() itself isn't here as an inline because that would
826 * bloat other code too much.
828 static inline struct kvm_memory_slot *
829 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
831 struct kvm_memory_slot *memslot;
833 kvm_for_each_memslot(memslot, slots)
834 if (gfn >= memslot->base_gfn &&
835 gfn < memslot->base_gfn + memslot->npages)
841 static inline struct kvm_memory_slot *
842 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
844 return search_memslots(slots, gfn);
847 static inline unsigned long
848 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
850 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
853 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
855 return gfn_to_memslot(kvm, gfn)->id;
859 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
861 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
863 return slot->base_gfn + gfn_offset;
866 static inline gpa_t gfn_to_gpa(gfn_t gfn)
868 return (gpa_t)gfn << PAGE_SHIFT;
871 static inline gfn_t gpa_to_gfn(gpa_t gpa)
873 return (gfn_t)(gpa >> PAGE_SHIFT);
876 static inline hpa_t pfn_to_hpa(pfn_t pfn)
878 return (hpa_t)pfn << PAGE_SHIFT;
881 static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa)
883 unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
885 return kvm_is_error_hva(hva);
888 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
890 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
898 struct kvm_stats_debugfs_item {
901 enum kvm_stat_kind kind;
902 struct dentry *dentry;
904 extern struct kvm_stats_debugfs_item debugfs_entries[];
905 extern struct dentry *kvm_debugfs_dir;
907 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
908 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
910 if (unlikely(kvm->mmu_notifier_count))
913 * Ensure the read of mmu_notifier_count happens before the read
914 * of mmu_notifier_seq. This interacts with the smp_wmb() in
915 * mmu_notifier_invalidate_range_end to make sure that the caller
916 * either sees the old (non-zero) value of mmu_notifier_count or
917 * the new (incremented) value of mmu_notifier_seq.
918 * PowerPC Book3s HV KVM calls this under a per-page lock
919 * rather than under kvm->mmu_lock, for scalability, so
920 * can't rely on kvm->mmu_lock to keep things ordered.
923 if (kvm->mmu_notifier_seq != mmu_seq)
929 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
932 #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that...
934 #define KVM_MAX_IRQ_ROUTES 1024
937 int kvm_setup_default_irq_routing(struct kvm *kvm);
938 int kvm_set_irq_routing(struct kvm *kvm,
939 const struct kvm_irq_routing_entry *entries,
942 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
943 const struct kvm_irq_routing_entry *ue);
944 void kvm_free_irq_routing(struct kvm *kvm);
948 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
952 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
954 #ifdef CONFIG_HAVE_KVM_EVENTFD
956 void kvm_eventfd_init(struct kvm *kvm);
957 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
959 #ifdef CONFIG_HAVE_KVM_IRQFD
960 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
961 void kvm_irqfd_release(struct kvm *kvm);
962 void kvm_irq_routing_update(struct kvm *);
964 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
969 static inline void kvm_irqfd_release(struct kvm *kvm) {}
974 static inline void kvm_eventfd_init(struct kvm *kvm) {}
976 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
981 static inline void kvm_irqfd_release(struct kvm *kvm) {}
983 #ifdef CONFIG_HAVE_KVM_IRQCHIP
984 static inline void kvm_irq_routing_update(struct kvm *kvm)
989 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
994 #endif /* CONFIG_HAVE_KVM_EVENTFD */
996 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
997 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
999 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
1002 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
1006 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
1010 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
1012 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
1015 void kvm_free_all_assigned_devices(struct kvm *kvm);
1019 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
1025 static inline void kvm_free_all_assigned_devices(struct kvm *kvm) {}
1029 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1031 set_bit(req, &vcpu->requests);
1034 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1036 if (test_bit(req, &vcpu->requests)) {
1037 clear_bit(req, &vcpu->requests);
1044 extern bool kvm_rebooting;
1047 struct kvm_device_ops *ops;
1050 struct list_head vm_node;
1053 /* create, destroy, and name are mandatory */
1054 struct kvm_device_ops {
1056 int (*create)(struct kvm_device *dev, u32 type);
1059 * Destroy is responsible for freeing dev.
1061 * Destroy may be called before or after destructors are called
1062 * on emulated I/O regions, depending on whether a reference is
1063 * held by a vcpu or other kvm component that gets destroyed
1064 * after the emulated I/O.
1066 void (*destroy)(struct kvm_device *dev);
1068 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1069 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1070 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1071 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1075 void kvm_device_get(struct kvm_device *dev);
1076 void kvm_device_put(struct kvm_device *dev);
1077 struct kvm_device *kvm_device_from_filp(struct file *filp);
1078 int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type);
1080 extern struct kvm_device_ops kvm_mpic_ops;
1081 extern struct kvm_device_ops kvm_xics_ops;
1083 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1085 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1087 vcpu->spin_loop.in_spin_loop = val;
1089 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1091 vcpu->spin_loop.dy_eligible = val;
1094 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1096 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1100 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1103 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */