4 #if IS_ENABLED(CONFIG_KVM)
7 * This work is licensed under the terms of the GNU GPL, version 2. See
8 * the COPYING file in the top-level directory.
11 #include <linux/types.h>
12 #include <linux/hardirq.h>
13 #include <linux/list.h>
14 #include <linux/mutex.h>
15 #include <linux/spinlock.h>
16 #include <linux/signal.h>
17 #include <linux/sched.h>
18 #include <linux/bug.h>
20 #include <linux/mmu_notifier.h>
21 #include <linux/preempt.h>
22 #include <linux/msi.h>
23 #include <linux/slab.h>
24 #include <linux/rcupdate.h>
25 #include <linux/ratelimit.h>
26 #include <linux/err.h>
27 #include <linux/irqflags.h>
28 #include <asm/signal.h>
30 #include <linux/kvm.h>
31 #include <linux/kvm_para.h>
33 #include <linux/kvm_types.h>
35 #include <asm/kvm_host.h>
38 #define KVM_MMIO_SIZE 8
42 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
43 * in kvm, other bits are visible for userspace which are defined in
44 * include/linux/kvm_h.
46 #define KVM_MEMSLOT_INVALID (1UL << 16)
48 /* Two fragments for cross MMIO pages. */
49 #define KVM_MAX_MMIO_FRAGMENTS 2
52 * For the normal pfn, the highest 12 bits should be zero,
53 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
54 * mask bit 63 to indicate the noslot pfn.
56 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
57 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
58 #define KVM_PFN_NOSLOT (0x1ULL << 63)
60 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
61 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
62 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
65 * error pfns indicate that the gfn is in slot but faild to
66 * translate it to pfn on host.
68 static inline bool is_error_pfn(pfn_t pfn)
70 return !!(pfn & KVM_PFN_ERR_MASK);
74 * error_noslot pfns indicate that the gfn can not be
75 * translated to pfn - it is not in slot or failed to
76 * translate it to pfn.
78 static inline bool is_error_noslot_pfn(pfn_t pfn)
80 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
83 /* noslot pfn indicates that the gfn is not in slot. */
84 static inline bool is_noslot_pfn(pfn_t pfn)
86 return pfn == KVM_PFN_NOSLOT;
89 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
90 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
92 static inline bool kvm_is_error_hva(unsigned long addr)
94 return addr >= PAGE_OFFSET;
97 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
99 static inline bool is_error_page(struct page *page)
105 * vcpu->requests bit members
107 #define KVM_REQ_TLB_FLUSH 0
108 #define KVM_REQ_MIGRATE_TIMER 1
109 #define KVM_REQ_REPORT_TPR_ACCESS 2
110 #define KVM_REQ_MMU_RELOAD 3
111 #define KVM_REQ_TRIPLE_FAULT 4
112 #define KVM_REQ_PENDING_TIMER 5
113 #define KVM_REQ_UNHALT 6
114 #define KVM_REQ_MMU_SYNC 7
115 #define KVM_REQ_CLOCK_UPDATE 8
116 #define KVM_REQ_KICK 9
117 #define KVM_REQ_DEACTIVATE_FPU 10
118 #define KVM_REQ_EVENT 11
119 #define KVM_REQ_APF_HALT 12
120 #define KVM_REQ_STEAL_UPDATE 13
121 #define KVM_REQ_NMI 14
122 #define KVM_REQ_PMU 15
123 #define KVM_REQ_PMI 16
124 #define KVM_REQ_WATCHDOG 17
125 #define KVM_REQ_MASTERCLOCK_UPDATE 18
126 #define KVM_REQ_MCLOCK_INPROGRESS 19
127 #define KVM_REQ_EPR_EXIT 20
128 #define KVM_REQ_SCAN_IOAPIC 21
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
150 struct kvm_io_range range[];
156 KVM_VIRTIO_CCW_NOTIFY_BUS,
160 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
161 int len, const void *val);
162 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
164 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
165 int len, struct kvm_io_device *dev);
166 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
167 struct kvm_io_device *dev);
169 #ifdef CONFIG_KVM_ASYNC_PF
170 struct kvm_async_pf {
171 struct work_struct work;
172 struct list_head link;
173 struct list_head queue;
174 struct kvm_vcpu *vcpu;
175 struct mm_struct *mm;
178 struct kvm_arch_async_pf arch;
183 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
184 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
185 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
186 struct kvm_arch_async_pf *arch);
187 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
194 READING_SHADOW_PAGE_TABLES,
198 * Sometimes a large or cross-page mmio needs to be broken up into separate
199 * exits for userspace servicing.
201 struct kvm_mmio_fragment {
209 #ifdef CONFIG_PREEMPT_NOTIFIERS
210 struct preempt_notifier preempt_notifier;
216 unsigned long requests;
217 unsigned long guest_debug;
223 int guest_fpu_loaded, guest_xcr0_loaded;
224 wait_queue_head_t wq;
228 struct kvm_vcpu_stat stat;
230 #ifdef CONFIG_HAS_IOMEM
232 int mmio_read_completed;
234 int mmio_cur_fragment;
235 int mmio_nr_fragments;
236 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
239 #ifdef CONFIG_KVM_ASYNC_PF
242 struct list_head queue;
243 struct list_head done;
248 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
250 * Cpu relax intercept or pause loop exit optimization
251 * in_spin_loop: set when a vcpu does a pause loop exit
252 * or cpu relax intercepted.
253 * 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;
278 unsigned long *dirty_bitmap;
279 struct kvm_arch_memory_slot arch;
280 unsigned long userspace_addr;
285 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
287 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
290 struct kvm_kernel_irq_routing_entry {
293 int (*set)(struct kvm_kernel_irq_routing_entry *e,
294 struct kvm *kvm, int irq_source_id, int level,
303 struct hlist_node link;
306 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
308 struct kvm_irq_routing_table {
309 int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_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_PRIVATE_MEM_SLOTS
326 #define KVM_PRIVATE_MEM_SLOTS 0
329 #ifndef KVM_MEM_SLOTS_NUM
330 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
335 * memslots are not sorted by id anymore, please use id_to_memslot()
336 * to get the memslot by its id.
338 struct kvm_memslots {
340 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
341 /* The mapping table from slot id to the index in memslots[]. */
342 short id_to_index[KVM_MEM_SLOTS_NUM];
347 struct mutex slots_lock;
348 struct mm_struct *mm; /* userspace tied to this vm */
349 struct kvm_memslots *memslots;
350 struct srcu_struct srcu;
351 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
354 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
355 atomic_t online_vcpus;
356 int last_boosted_vcpu;
357 struct list_head vm_list;
359 struct kvm_io_bus *buses[KVM_NR_BUSES];
360 #ifdef CONFIG_HAVE_KVM_EVENTFD
363 struct list_head items;
364 struct list_head resampler_list;
365 struct mutex resampler_lock;
367 struct list_head ioeventfds;
369 struct kvm_vm_stat stat;
370 struct kvm_arch arch;
371 atomic_t users_count;
372 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
373 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
374 spinlock_t ring_lock;
375 struct list_head coalesced_zones;
378 struct mutex irq_lock;
379 #ifdef CONFIG_HAVE_KVM_IRQCHIP
381 * Update side is protected by irq_lock and,
382 * if configured, irqfds.lock.
384 struct kvm_irq_routing_table __rcu *irq_routing;
385 struct hlist_head mask_notifier_list;
386 struct hlist_head irq_ack_notifier_list;
389 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
390 struct mmu_notifier mmu_notifier;
391 unsigned long mmu_notifier_seq;
392 long mmu_notifier_count;
395 struct list_head devices;
398 #define kvm_err(fmt, ...) \
399 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
400 #define kvm_info(fmt, ...) \
401 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
402 #define kvm_debug(fmt, ...) \
403 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
404 #define kvm_pr_unimpl(fmt, ...) \
405 pr_err_ratelimited("kvm [%i]: " fmt, \
406 task_tgid_nr(current), ## __VA_ARGS__)
408 /* The guest did something we don't support. */
409 #define vcpu_unimpl(vcpu, fmt, ...) \
410 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
412 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
415 return kvm->vcpus[i];
418 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
420 idx < atomic_read(&kvm->online_vcpus) && \
421 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
424 #define kvm_for_each_memslot(memslot, slots) \
425 for (memslot = &slots->memslots[0]; \
426 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
429 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
430 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
432 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
433 void vcpu_put(struct kvm_vcpu *vcpu);
435 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
436 int kvm_irqfd_init(void);
437 void kvm_irqfd_exit(void);
439 static inline int kvm_irqfd_init(void)
444 static inline void kvm_irqfd_exit(void)
448 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
449 struct module *module);
452 void kvm_get_kvm(struct kvm *kvm);
453 void kvm_put_kvm(struct kvm *kvm);
454 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new,
455 u64 last_generation);
457 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
459 return rcu_dereference_check(kvm->memslots,
460 srcu_read_lock_held(&kvm->srcu)
461 || lockdep_is_held(&kvm->slots_lock));
464 static inline struct kvm_memory_slot *
465 id_to_memslot(struct kvm_memslots *slots, int id)
467 int index = slots->id_to_index[id];
468 struct kvm_memory_slot *slot;
470 slot = &slots->memslots[index];
472 WARN_ON(slot->id != id);
477 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
478 * - create a new memory slot
479 * - delete an existing memory slot
480 * - modify an existing memory slot
481 * -- move it in the guest physical memory space
482 * -- just change its flags
484 * Since flags can be changed by some of these operations, the following
485 * differentiation is the best we can do for __kvm_set_memory_region():
494 int kvm_set_memory_region(struct kvm *kvm,
495 struct kvm_userspace_memory_region *mem);
496 int __kvm_set_memory_region(struct kvm *kvm,
497 struct kvm_userspace_memory_region *mem);
498 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
499 struct kvm_memory_slot *dont);
500 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
501 int kvm_arch_prepare_memory_region(struct kvm *kvm,
502 struct kvm_memory_slot *memslot,
503 struct kvm_userspace_memory_region *mem,
504 enum kvm_mr_change change);
505 void kvm_arch_commit_memory_region(struct kvm *kvm,
506 struct kvm_userspace_memory_region *mem,
507 const struct kvm_memory_slot *old,
508 enum kvm_mr_change change);
509 bool kvm_largepages_enabled(void);
510 void kvm_disable_largepages(void);
511 /* flush all memory translations */
512 void kvm_arch_flush_shadow_all(struct kvm *kvm);
513 /* flush memory translations pointing to 'slot' */
514 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
515 struct kvm_memory_slot *slot);
517 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
520 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
521 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
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_dirty(struct page *page);
526 void kvm_set_page_accessed(struct page *page);
528 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
529 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
530 bool write_fault, bool *writable);
531 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
532 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
534 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
535 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
537 void kvm_release_pfn_dirty(pfn_t pfn);
538 void kvm_release_pfn_clean(pfn_t pfn);
539 void kvm_set_pfn_dirty(pfn_t pfn);
540 void kvm_set_pfn_accessed(pfn_t pfn);
541 void kvm_get_pfn(pfn_t pfn);
543 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
545 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
547 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
548 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
549 void *data, unsigned long len);
550 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
551 int offset, int len);
552 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
554 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
555 void *data, unsigned long len);
556 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
558 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
559 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
560 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
561 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
562 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
563 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
564 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
567 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
568 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
569 bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
570 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
571 void kvm_resched(struct kvm_vcpu *vcpu);
572 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
573 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
575 void kvm_flush_remote_tlbs(struct kvm *kvm);
576 void kvm_reload_remote_mmus(struct kvm *kvm);
577 void kvm_make_mclock_inprogress_request(struct kvm *kvm);
578 void kvm_make_scan_ioapic_request(struct kvm *kvm);
580 long kvm_arch_dev_ioctl(struct file *filp,
581 unsigned int ioctl, unsigned long arg);
582 long kvm_arch_vcpu_ioctl(struct file *filp,
583 unsigned int ioctl, unsigned long arg);
584 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
586 int kvm_dev_ioctl_check_extension(long ext);
588 int kvm_get_dirty_log(struct kvm *kvm,
589 struct kvm_dirty_log *log, int *is_dirty);
590 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
591 struct kvm_dirty_log *log);
593 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
594 struct kvm_userspace_memory_region *mem);
595 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
597 long kvm_arch_vm_ioctl(struct file *filp,
598 unsigned int ioctl, unsigned long arg);
600 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
601 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
603 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
604 struct kvm_translation *tr);
606 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
607 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
608 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
609 struct kvm_sregs *sregs);
610 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
611 struct kvm_sregs *sregs);
612 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
613 struct kvm_mp_state *mp_state);
614 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
615 struct kvm_mp_state *mp_state);
616 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
617 struct kvm_guest_debug *dbg);
618 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
620 int kvm_arch_init(void *opaque);
621 void kvm_arch_exit(void);
623 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
624 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
626 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
627 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
628 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
629 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
630 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
631 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
632 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
634 int kvm_arch_hardware_enable(void *garbage);
635 void kvm_arch_hardware_disable(void *garbage);
636 int kvm_arch_hardware_setup(void);
637 void kvm_arch_hardware_unsetup(void);
638 void kvm_arch_check_processor_compat(void *rtn);
639 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
640 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
642 void kvm_free_physmem(struct kvm *kvm);
644 void *kvm_kvzalloc(unsigned long size);
645 void kvm_kvfree(const void *addr);
647 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
648 static inline struct kvm *kvm_arch_alloc_vm(void)
650 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
653 static inline void kvm_arch_free_vm(struct kvm *kvm)
659 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
661 #ifdef __KVM_HAVE_ARCH_WQP
662 return vcpu->arch.wqp;
668 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
669 void kvm_arch_destroy_vm(struct kvm *kvm);
670 void kvm_arch_sync_events(struct kvm *kvm);
672 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
673 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
675 bool kvm_is_mmio_pfn(pfn_t pfn);
677 struct kvm_irq_ack_notifier {
678 struct hlist_node link;
680 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
683 struct kvm_assigned_dev_kernel {
684 struct kvm_irq_ack_notifier ack_notifier;
685 struct list_head list;
690 unsigned int entries_nr;
692 bool host_irq_disabled;
694 struct msix_entry *host_msix_entries;
696 struct msix_entry *guest_msix_entries;
697 unsigned long irq_requested_type;
702 spinlock_t intx_lock;
703 spinlock_t intx_mask_lock;
705 struct pci_saved_state *pci_saved_state;
708 struct kvm_irq_mask_notifier {
709 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
711 struct hlist_node link;
714 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
715 struct kvm_irq_mask_notifier *kimn);
716 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
717 struct kvm_irq_mask_notifier *kimn);
718 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
721 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
723 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);
724 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
725 int irq_source_id, int level, bool line_status);
726 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
727 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
728 void kvm_register_irq_ack_notifier(struct kvm *kvm,
729 struct kvm_irq_ack_notifier *kian);
730 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
731 struct kvm_irq_ack_notifier *kian);
732 int kvm_request_irq_source_id(struct kvm *kvm);
733 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
735 /* For vcpu->arch.iommu_flags */
736 #define KVM_IOMMU_CACHE_COHERENCY 0x1
738 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
739 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
740 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
741 int kvm_iommu_map_guest(struct kvm *kvm);
742 int kvm_iommu_unmap_guest(struct kvm *kvm);
743 int kvm_assign_device(struct kvm *kvm,
744 struct kvm_assigned_dev_kernel *assigned_dev);
745 int kvm_deassign_device(struct kvm *kvm,
746 struct kvm_assigned_dev_kernel *assigned_dev);
748 static inline int kvm_iommu_map_pages(struct kvm *kvm,
749 struct kvm_memory_slot *slot)
754 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
755 struct kvm_memory_slot *slot)
759 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
765 static inline void __guest_enter(void)
768 * This is running in ioctl context so we can avoid
769 * the call to vtime_account() with its unnecessary idle check.
771 vtime_account_system(current);
772 current->flags |= PF_VCPU;
775 static inline void __guest_exit(void)
778 * This is running in ioctl context so we can avoid
779 * the call to vtime_account() with its unnecessary idle check.
781 vtime_account_system(current);
782 current->flags &= ~PF_VCPU;
785 #ifdef CONFIG_CONTEXT_TRACKING
786 extern void guest_enter(void);
787 extern void guest_exit(void);
789 #else /* !CONFIG_CONTEXT_TRACKING */
790 static inline void guest_enter(void)
795 static inline void guest_exit(void)
799 #endif /* !CONFIG_CONTEXT_TRACKING */
801 static inline void kvm_guest_enter(void)
805 BUG_ON(preemptible());
807 local_irq_save(flags);
809 local_irq_restore(flags);
811 /* KVM does not hold any references to rcu protected data when it
812 * switches CPU into a guest mode. In fact switching to a guest mode
813 * is very similar to exiting to userspase from rcu point of view. In
814 * addition CPU may stay in a guest mode for quite a long time (up to
815 * one time slice). Lets treat guest mode as quiescent state, just like
816 * we do with user-mode execution.
818 rcu_virt_note_context_switch(smp_processor_id());
821 static inline void kvm_guest_exit(void)
825 local_irq_save(flags);
827 local_irq_restore(flags);
831 * search_memslots() and __gfn_to_memslot() are here because they are
832 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
833 * gfn_to_memslot() itself isn't here as an inline because that would
834 * bloat other code too much.
836 static inline struct kvm_memory_slot *
837 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
839 struct kvm_memory_slot *memslot;
841 kvm_for_each_memslot(memslot, slots)
842 if (gfn >= memslot->base_gfn &&
843 gfn < memslot->base_gfn + memslot->npages)
849 static inline struct kvm_memory_slot *
850 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
852 return search_memslots(slots, gfn);
855 static inline unsigned long
856 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
858 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
861 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
863 return gfn_to_memslot(kvm, gfn)->id;
866 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
868 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
869 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
870 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
874 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
876 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
878 return slot->base_gfn + gfn_offset;
881 static inline gpa_t gfn_to_gpa(gfn_t gfn)
883 return (gpa_t)gfn << PAGE_SHIFT;
886 static inline gfn_t gpa_to_gfn(gpa_t gpa)
888 return (gfn_t)(gpa >> PAGE_SHIFT);
891 static inline hpa_t pfn_to_hpa(pfn_t pfn)
893 return (hpa_t)pfn << PAGE_SHIFT;
896 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
898 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
906 struct kvm_stats_debugfs_item {
909 enum kvm_stat_kind kind;
910 struct dentry *dentry;
912 extern struct kvm_stats_debugfs_item debugfs_entries[];
913 extern struct dentry *kvm_debugfs_dir;
915 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
916 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
918 if (unlikely(kvm->mmu_notifier_count))
921 * Ensure the read of mmu_notifier_count happens before the read
922 * of mmu_notifier_seq. This interacts with the smp_wmb() in
923 * mmu_notifier_invalidate_range_end to make sure that the caller
924 * either sees the old (non-zero) value of mmu_notifier_count or
925 * the new (incremented) value of mmu_notifier_seq.
926 * PowerPC Book3s HV KVM calls this under a per-page lock
927 * rather than under kvm->mmu_lock, for scalability, so
928 * can't rely on kvm->mmu_lock to keep things ordered.
931 if (kvm->mmu_notifier_seq != mmu_seq)
937 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
939 #define KVM_MAX_IRQ_ROUTES 1024
941 int kvm_setup_default_irq_routing(struct kvm *kvm);
942 int kvm_set_irq_routing(struct kvm *kvm,
943 const struct kvm_irq_routing_entry *entries,
946 int kvm_set_routing_entry(struct kvm_irq_routing_table *rt,
947 struct kvm_kernel_irq_routing_entry *e,
948 const struct kvm_irq_routing_entry *ue);
949 void kvm_free_irq_routing(struct kvm *kvm);
951 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
955 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
959 #ifdef CONFIG_HAVE_KVM_EVENTFD
961 void kvm_eventfd_init(struct kvm *kvm);
962 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
964 #ifdef CONFIG_HAVE_KVM_IRQCHIP
965 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
966 void kvm_irqfd_release(struct kvm *kvm);
967 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
969 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
974 static inline void kvm_irqfd_release(struct kvm *kvm) {}
979 static inline void kvm_eventfd_init(struct kvm *kvm) {}
981 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
986 static inline void kvm_irqfd_release(struct kvm *kvm) {}
988 #ifdef CONFIG_HAVE_KVM_IRQCHIP
989 static inline void kvm_irq_routing_update(struct kvm *kvm,
990 struct kvm_irq_routing_table *irq_rt)
992 rcu_assign_pointer(kvm->irq_routing, irq_rt);
996 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
1001 #endif /* CONFIG_HAVE_KVM_EVENTFD */
1003 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
1004 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
1006 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
1009 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
1013 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
1017 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
1019 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
1022 void kvm_free_all_assigned_devices(struct kvm *kvm);
1026 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
1032 static inline void kvm_free_all_assigned_devices(struct kvm *kvm) {}
1036 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1038 set_bit(req, &vcpu->requests);
1041 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1043 if (test_bit(req, &vcpu->requests)) {
1044 clear_bit(req, &vcpu->requests);
1051 extern bool kvm_rebooting;
1053 struct kvm_device_ops;
1056 struct kvm_device_ops *ops;
1059 struct list_head vm_node;
1062 /* create, destroy, and name are mandatory */
1063 struct kvm_device_ops {
1065 int (*create)(struct kvm_device *dev, u32 type);
1068 * Destroy is responsible for freeing dev.
1070 * Destroy may be called before or after destructors are called
1071 * on emulated I/O regions, depending on whether a reference is
1072 * held by a vcpu or other kvm component that gets destroyed
1073 * after the emulated I/O.
1075 void (*destroy)(struct kvm_device *dev);
1077 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1078 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1079 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1080 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1084 void kvm_device_get(struct kvm_device *dev);
1085 void kvm_device_put(struct kvm_device *dev);
1086 struct kvm_device *kvm_device_from_filp(struct file *filp);
1088 extern struct kvm_device_ops kvm_mpic_ops;
1090 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1092 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1094 vcpu->spin_loop.in_spin_loop = val;
1096 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1098 vcpu->spin_loop.dy_eligible = val;
1101 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1103 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1107 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1111 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu)
1116 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1118 static inline void __guest_enter(void) { return; }
1119 static inline void __guest_exit(void) { return; }
1120 #endif /* IS_ENABLED(CONFIG_KVM) */