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_IMMEDIATE_EXIT 15
123 #define KVM_REQ_PMU 16
124 #define KVM_REQ_PMI 17
125 #define KVM_REQ_WATCHDOG 18
126 #define KVM_REQ_MASTERCLOCK_UPDATE 19
127 #define KVM_REQ_MCLOCK_INPROGRESS 20
128 #define KVM_REQ_EPR_EXIT 21
129 #define KVM_REQ_EOIBITMAP 22
131 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
132 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
136 extern struct kmem_cache *kvm_vcpu_cache;
138 struct kvm_io_range {
141 struct kvm_io_device *dev;
144 #define NR_IOBUS_DEVS 1000
148 struct kvm_io_range range[];
157 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
158 int len, const void *val);
159 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
161 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
162 int len, struct kvm_io_device *dev);
163 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
164 struct kvm_io_device *dev);
166 #ifdef CONFIG_KVM_ASYNC_PF
167 struct kvm_async_pf {
168 struct work_struct work;
169 struct list_head link;
170 struct list_head queue;
171 struct kvm_vcpu *vcpu;
172 struct mm_struct *mm;
175 struct kvm_arch_async_pf arch;
180 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
181 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
182 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
183 struct kvm_arch_async_pf *arch);
184 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
191 READING_SHADOW_PAGE_TABLES,
195 * Sometimes a large or cross-page mmio needs to be broken up into separate
196 * exits for userspace servicing.
198 struct kvm_mmio_fragment {
206 #ifdef CONFIG_PREEMPT_NOTIFIERS
207 struct preempt_notifier preempt_notifier;
213 unsigned long requests;
214 unsigned long guest_debug;
220 int guest_fpu_loaded, guest_xcr0_loaded;
221 wait_queue_head_t wq;
225 struct kvm_vcpu_stat stat;
227 #ifdef CONFIG_HAS_IOMEM
229 int mmio_read_completed;
231 int mmio_cur_fragment;
232 int mmio_nr_fragments;
233 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
236 #ifdef CONFIG_KVM_ASYNC_PF
239 struct list_head queue;
240 struct list_head done;
245 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
247 * Cpu relax intercept or pause loop exit optimization
248 * in_spin_loop: set when a vcpu does a pause loop exit
249 * or cpu relax intercepted.
250 * dy_eligible: indicates whether vcpu is eligible for directed yield.
257 struct kvm_vcpu_arch arch;
260 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
262 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
266 * Some of the bitops functions do not support too long bitmaps.
267 * This number must be determined not to exceed such limits.
269 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
271 struct kvm_memory_slot {
273 unsigned long npages;
274 unsigned long *dirty_bitmap;
275 struct kvm_arch_memory_slot arch;
276 unsigned long userspace_addr;
281 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
283 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
286 struct kvm_kernel_irq_routing_entry {
289 int (*set)(struct kvm_kernel_irq_routing_entry *e,
290 struct kvm *kvm, int irq_source_id, int level);
298 struct hlist_node link;
301 #ifdef __KVM_HAVE_IOAPIC
303 struct kvm_irq_routing_table {
304 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
305 struct kvm_kernel_irq_routing_entry *rt_entries;
308 * Array indexed by gsi. Each entry contains list of irq chips
309 * the gsi is connected to.
311 struct hlist_head map[0];
316 struct kvm_irq_routing_table {};
320 #ifndef KVM_PRIVATE_MEM_SLOTS
321 #define KVM_PRIVATE_MEM_SLOTS 0
324 #ifndef KVM_MEM_SLOTS_NUM
325 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
330 * memslots are not sorted by id anymore, please use id_to_memslot()
331 * to get the memslot by its id.
333 struct kvm_memslots {
335 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
336 /* The mapping table from slot id to the index in memslots[]. */
337 short id_to_index[KVM_MEM_SLOTS_NUM];
342 struct mutex slots_lock;
343 struct mm_struct *mm; /* userspace tied to this vm */
344 struct kvm_memslots *memslots;
345 struct srcu_struct srcu;
346 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
349 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
350 atomic_t online_vcpus;
351 int last_boosted_vcpu;
352 struct list_head vm_list;
354 struct kvm_io_bus *buses[KVM_NR_BUSES];
355 #ifdef CONFIG_HAVE_KVM_EVENTFD
358 struct list_head items;
359 struct list_head resampler_list;
360 struct mutex resampler_lock;
362 struct list_head ioeventfds;
364 struct kvm_vm_stat stat;
365 struct kvm_arch arch;
366 atomic_t users_count;
367 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
368 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
369 spinlock_t ring_lock;
370 struct list_head coalesced_zones;
373 struct mutex irq_lock;
374 #ifdef CONFIG_HAVE_KVM_IRQCHIP
376 * Update side is protected by irq_lock and,
377 * if configured, irqfds.lock.
379 struct kvm_irq_routing_table __rcu *irq_routing;
380 struct hlist_head mask_notifier_list;
381 struct hlist_head irq_ack_notifier_list;
384 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
385 struct mmu_notifier mmu_notifier;
386 unsigned long mmu_notifier_seq;
387 long mmu_notifier_count;
392 #define kvm_err(fmt, ...) \
393 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
394 #define kvm_info(fmt, ...) \
395 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
396 #define kvm_debug(fmt, ...) \
397 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
398 #define kvm_pr_unimpl(fmt, ...) \
399 pr_err_ratelimited("kvm [%i]: " fmt, \
400 task_tgid_nr(current), ## __VA_ARGS__)
402 /* The guest did something we don't support. */
403 #define vcpu_unimpl(vcpu, fmt, ...) \
404 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
406 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
409 return kvm->vcpus[i];
412 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
414 idx < atomic_read(&kvm->online_vcpus) && \
415 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
418 #define kvm_for_each_memslot(memslot, slots) \
419 for (memslot = &slots->memslots[0]; \
420 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
423 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
424 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
426 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
427 void vcpu_put(struct kvm_vcpu *vcpu);
429 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
430 struct module *module);
433 void kvm_get_kvm(struct kvm *kvm);
434 void kvm_put_kvm(struct kvm *kvm);
435 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new,
436 u64 last_generation);
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);
543 void kvm_make_mclock_inprogress_request(struct kvm *kvm);
544 void kvm_make_update_eoibitmap_request(struct kvm *kvm);
546 long kvm_arch_dev_ioctl(struct file *filp,
547 unsigned int ioctl, unsigned long arg);
548 long kvm_arch_vcpu_ioctl(struct file *filp,
549 unsigned int ioctl, unsigned long arg);
550 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
552 int kvm_dev_ioctl_check_extension(long ext);
554 int kvm_get_dirty_log(struct kvm *kvm,
555 struct kvm_dirty_log *log, int *is_dirty);
556 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
557 struct kvm_dirty_log *log);
559 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
561 kvm_userspace_memory_region *mem,
563 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level);
564 long kvm_arch_vm_ioctl(struct file *filp,
565 unsigned int ioctl, unsigned long arg);
567 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
568 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
570 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
571 struct kvm_translation *tr);
573 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
574 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
575 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
576 struct kvm_sregs *sregs);
577 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
578 struct kvm_sregs *sregs);
579 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
580 struct kvm_mp_state *mp_state);
581 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
582 struct kvm_mp_state *mp_state);
583 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
584 struct kvm_guest_debug *dbg);
585 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
587 int kvm_arch_init(void *opaque);
588 void kvm_arch_exit(void);
590 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
591 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
593 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
594 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
595 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
596 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
597 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
598 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
599 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
601 int kvm_arch_hardware_enable(void *garbage);
602 void kvm_arch_hardware_disable(void *garbage);
603 int kvm_arch_hardware_setup(void);
604 void kvm_arch_hardware_unsetup(void);
605 void kvm_arch_check_processor_compat(void *rtn);
606 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
607 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
609 void kvm_free_physmem(struct kvm *kvm);
611 void *kvm_kvzalloc(unsigned long size);
612 void kvm_kvfree(const void *addr);
614 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
615 static inline struct kvm *kvm_arch_alloc_vm(void)
617 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
620 static inline void kvm_arch_free_vm(struct kvm *kvm)
626 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
628 #ifdef __KVM_HAVE_ARCH_WQP
629 return vcpu->arch.wqp;
635 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
636 void kvm_arch_destroy_vm(struct kvm *kvm);
637 void kvm_free_all_assigned_devices(struct kvm *kvm);
638 void kvm_arch_sync_events(struct kvm *kvm);
640 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
641 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
643 bool kvm_is_mmio_pfn(pfn_t pfn);
645 struct kvm_irq_ack_notifier {
646 struct hlist_node link;
648 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
651 struct kvm_assigned_dev_kernel {
652 struct kvm_irq_ack_notifier ack_notifier;
653 struct list_head list;
658 unsigned int entries_nr;
660 bool host_irq_disabled;
662 struct msix_entry *host_msix_entries;
664 struct msix_entry *guest_msix_entries;
665 unsigned long irq_requested_type;
670 spinlock_t intx_lock;
671 spinlock_t intx_mask_lock;
673 struct pci_saved_state *pci_saved_state;
676 struct kvm_irq_mask_notifier {
677 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
679 struct hlist_node link;
682 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
683 struct kvm_irq_mask_notifier *kimn);
684 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
685 struct kvm_irq_mask_notifier *kimn);
686 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
689 #ifdef __KVM_HAVE_IOAPIC
690 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
691 union kvm_ioapic_redirect_entry *entry,
692 unsigned long *deliver_bitmask);
694 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
695 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);
696 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
697 int irq_source_id, int level);
698 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
699 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
700 void kvm_register_irq_ack_notifier(struct kvm *kvm,
701 struct kvm_irq_ack_notifier *kian);
702 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
703 struct kvm_irq_ack_notifier *kian);
704 int kvm_request_irq_source_id(struct kvm *kvm);
705 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
707 /* For vcpu->arch.iommu_flags */
708 #define KVM_IOMMU_CACHE_COHERENCY 0x1
710 #ifdef CONFIG_IOMMU_API
711 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
712 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
713 int kvm_iommu_map_guest(struct kvm *kvm);
714 int kvm_iommu_unmap_guest(struct kvm *kvm);
715 int kvm_assign_device(struct kvm *kvm,
716 struct kvm_assigned_dev_kernel *assigned_dev);
717 int kvm_deassign_device(struct kvm *kvm,
718 struct kvm_assigned_dev_kernel *assigned_dev);
719 #else /* CONFIG_IOMMU_API */
720 static inline int kvm_iommu_map_pages(struct kvm *kvm,
721 struct kvm_memory_slot *slot)
726 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
727 struct kvm_memory_slot *slot)
731 static inline int kvm_iommu_map_guest(struct kvm *kvm)
736 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
741 static inline int kvm_assign_device(struct kvm *kvm,
742 struct kvm_assigned_dev_kernel *assigned_dev)
747 static inline int kvm_deassign_device(struct kvm *kvm,
748 struct kvm_assigned_dev_kernel *assigned_dev)
752 #endif /* CONFIG_IOMMU_API */
754 static inline void __guest_enter(void)
757 * This is running in ioctl context so we can avoid
758 * the call to vtime_account() with its unnecessary idle check.
760 vtime_account_system(current);
761 current->flags |= PF_VCPU;
764 static inline void __guest_exit(void)
767 * This is running in ioctl context so we can avoid
768 * the call to vtime_account() with its unnecessary idle check.
770 vtime_account_system(current);
771 current->flags &= ~PF_VCPU;
774 #ifdef CONFIG_CONTEXT_TRACKING
775 extern void guest_enter(void);
776 extern void guest_exit(void);
778 #else /* !CONFIG_CONTEXT_TRACKING */
779 static inline void guest_enter(void)
784 static inline void guest_exit(void)
788 #endif /* !CONFIG_CONTEXT_TRACKING */
790 static inline void kvm_guest_enter(void)
794 BUG_ON(preemptible());
796 local_irq_save(flags);
798 local_irq_restore(flags);
800 /* KVM does not hold any references to rcu protected data when it
801 * switches CPU into a guest mode. In fact switching to a guest mode
802 * is very similar to exiting to userspase from rcu point of view. In
803 * addition CPU may stay in a guest mode for quite a long time (up to
804 * one time slice). Lets treat guest mode as quiescent state, just like
805 * we do with user-mode execution.
807 rcu_virt_note_context_switch(smp_processor_id());
810 static inline void kvm_guest_exit(void)
814 local_irq_save(flags);
816 local_irq_restore(flags);
820 * search_memslots() and __gfn_to_memslot() are here because they are
821 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
822 * gfn_to_memslot() itself isn't here as an inline because that would
823 * bloat other code too much.
825 static inline struct kvm_memory_slot *
826 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
828 struct kvm_memory_slot *memslot;
830 kvm_for_each_memslot(memslot, slots)
831 if (gfn >= memslot->base_gfn &&
832 gfn < memslot->base_gfn + memslot->npages)
838 static inline struct kvm_memory_slot *
839 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
841 return search_memslots(slots, gfn);
844 static inline unsigned long
845 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
847 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
850 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
852 return gfn_to_memslot(kvm, gfn)->id;
855 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
857 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
858 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
859 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
863 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
865 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
867 return slot->base_gfn + gfn_offset;
870 static inline gpa_t gfn_to_gpa(gfn_t gfn)
872 return (gpa_t)gfn << PAGE_SHIFT;
875 static inline gfn_t gpa_to_gfn(gpa_t gpa)
877 return (gfn_t)(gpa >> PAGE_SHIFT);
880 static inline hpa_t pfn_to_hpa(pfn_t pfn)
882 return (hpa_t)pfn << PAGE_SHIFT;
885 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
887 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
895 struct kvm_stats_debugfs_item {
898 enum kvm_stat_kind kind;
899 struct dentry *dentry;
901 extern struct kvm_stats_debugfs_item debugfs_entries[];
902 extern struct dentry *kvm_debugfs_dir;
904 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
905 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
907 if (unlikely(kvm->mmu_notifier_count))
910 * Ensure the read of mmu_notifier_count happens before the read
911 * of mmu_notifier_seq. This interacts with the smp_wmb() in
912 * mmu_notifier_invalidate_range_end to make sure that the caller
913 * either sees the old (non-zero) value of mmu_notifier_count or
914 * the new (incremented) value of mmu_notifier_seq.
915 * PowerPC Book3s HV KVM calls this under a per-page lock
916 * rather than under kvm->mmu_lock, for scalability, so
917 * can't rely on kvm->mmu_lock to keep things ordered.
920 if (kvm->mmu_notifier_seq != mmu_seq)
926 #ifdef KVM_CAP_IRQ_ROUTING
928 #define KVM_MAX_IRQ_ROUTES 1024
930 int kvm_setup_default_irq_routing(struct kvm *kvm);
931 int kvm_set_irq_routing(struct kvm *kvm,
932 const struct kvm_irq_routing_entry *entries,
935 void kvm_free_irq_routing(struct kvm *kvm);
937 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
941 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
945 #ifdef CONFIG_HAVE_KVM_EVENTFD
947 void kvm_eventfd_init(struct kvm *kvm);
948 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
950 #ifdef CONFIG_HAVE_KVM_IRQCHIP
951 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
952 void kvm_irqfd_release(struct kvm *kvm);
953 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
955 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
960 static inline void kvm_irqfd_release(struct kvm *kvm) {}
965 static inline void kvm_eventfd_init(struct kvm *kvm) {}
967 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
972 static inline void kvm_irqfd_release(struct kvm *kvm) {}
974 #ifdef CONFIG_HAVE_KVM_IRQCHIP
975 static inline void kvm_irq_routing_update(struct kvm *kvm,
976 struct kvm_irq_routing_table *irq_rt)
978 rcu_assign_pointer(kvm->irq_routing, irq_rt);
982 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
987 #endif /* CONFIG_HAVE_KVM_EVENTFD */
989 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
990 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
992 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
995 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
999 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
1003 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
1005 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
1010 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
1018 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1020 set_bit(req, &vcpu->requests);
1023 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1025 if (test_bit(req, &vcpu->requests)) {
1026 clear_bit(req, &vcpu->requests);
1033 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1035 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1037 vcpu->spin_loop.in_spin_loop = val;
1039 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1041 vcpu->spin_loop.dy_eligible = val;
1044 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1046 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1050 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1054 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu)
1059 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1061 static inline void __guest_enter(void) { return; }
1062 static inline void __guest_exit(void) { return; }
1063 #endif /* IS_ENABLED(CONFIG_KVM) */