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 <asm/signal.h>
28 #include <linux/kvm.h>
29 #include <linux/kvm_para.h>
31 #include <linux/kvm_types.h>
33 #include <asm/kvm_host.h>
36 #define KVM_MMIO_SIZE 8
40 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
41 * in kvm, other bits are visible for userspace which are defined in
42 * include/linux/kvm_h.
44 #define KVM_MEMSLOT_INVALID (1UL << 16)
46 /* Two fragments for cross MMIO pages. */
47 #define KVM_MAX_MMIO_FRAGMENTS 2
50 * For the normal pfn, the highest 12 bits should be zero,
51 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
52 * mask bit 63 to indicate the noslot pfn.
54 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
55 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
56 #define KVM_PFN_NOSLOT (0x1ULL << 63)
58 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
59 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
60 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
63 * error pfns indicate that the gfn is in slot but faild to
64 * translate it to pfn on host.
66 static inline bool is_error_pfn(pfn_t pfn)
68 return !!(pfn & KVM_PFN_ERR_MASK);
72 * error_noslot pfns indicate that the gfn can not be
73 * translated to pfn - it is not in slot or failed to
74 * translate it to pfn.
76 static inline bool is_error_noslot_pfn(pfn_t pfn)
78 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
81 /* noslot pfn indicates that the gfn is not in slot. */
82 static inline bool is_noslot_pfn(pfn_t pfn)
84 return pfn == KVM_PFN_NOSLOT;
87 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
88 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
90 static inline bool kvm_is_error_hva(unsigned long addr)
92 return addr >= PAGE_OFFSET;
95 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
97 static inline bool is_error_page(struct page *page)
103 * vcpu->requests bit members
105 #define KVM_REQ_TLB_FLUSH 0
106 #define KVM_REQ_MIGRATE_TIMER 1
107 #define KVM_REQ_REPORT_TPR_ACCESS 2
108 #define KVM_REQ_MMU_RELOAD 3
109 #define KVM_REQ_TRIPLE_FAULT 4
110 #define KVM_REQ_PENDING_TIMER 5
111 #define KVM_REQ_UNHALT 6
112 #define KVM_REQ_MMU_SYNC 7
113 #define KVM_REQ_CLOCK_UPDATE 8
114 #define KVM_REQ_KICK 9
115 #define KVM_REQ_DEACTIVATE_FPU 10
116 #define KVM_REQ_EVENT 11
117 #define KVM_REQ_APF_HALT 12
118 #define KVM_REQ_STEAL_UPDATE 13
119 #define KVM_REQ_NMI 14
120 #define KVM_REQ_PMU 15
121 #define KVM_REQ_PMI 16
122 #define KVM_REQ_WATCHDOG 17
123 #define KVM_REQ_MASTERCLOCK_UPDATE 18
124 #define KVM_REQ_MCLOCK_INPROGRESS 19
125 #define KVM_REQ_EPR_EXIT 20
126 #define KVM_REQ_SCAN_IOAPIC 21
128 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
129 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
133 extern struct kmem_cache *kvm_vcpu_cache;
135 extern raw_spinlock_t kvm_lock;
136 extern struct list_head vm_list;
138 struct kvm_io_range {
141 struct kvm_io_device *dev;
144 #define NR_IOBUS_DEVS 1000
148 struct kvm_io_range range[];
154 KVM_VIRTIO_CCW_NOTIFY_BUS,
158 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
159 int len, const void *val);
160 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
162 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
163 int len, struct kvm_io_device *dev);
164 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
165 struct kvm_io_device *dev);
167 #ifdef CONFIG_KVM_ASYNC_PF
168 struct kvm_async_pf {
169 struct work_struct work;
170 struct list_head link;
171 struct list_head queue;
172 struct kvm_vcpu *vcpu;
173 struct mm_struct *mm;
176 struct kvm_arch_async_pf arch;
181 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
182 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
183 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
184 struct kvm_arch_async_pf *arch);
185 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
192 READING_SHADOW_PAGE_TABLES,
196 * Sometimes a large or cross-page mmio needs to be broken up into separate
197 * exits for userspace servicing.
199 struct kvm_mmio_fragment {
207 #ifdef CONFIG_PREEMPT_NOTIFIERS
208 struct preempt_notifier preempt_notifier;
214 unsigned long requests;
215 unsigned long guest_debug;
221 int guest_fpu_loaded, guest_xcr0_loaded;
222 wait_queue_head_t wq;
226 struct kvm_vcpu_stat stat;
228 #ifdef CONFIG_HAS_IOMEM
230 int mmio_read_completed;
232 int mmio_cur_fragment;
233 int mmio_nr_fragments;
234 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
237 #ifdef CONFIG_KVM_ASYNC_PF
240 struct list_head queue;
241 struct list_head done;
246 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
248 * Cpu relax intercept or pause loop exit optimization
249 * in_spin_loop: set when a vcpu does a pause loop exit
250 * or cpu relax intercepted.
251 * dy_eligible: indicates whether vcpu is eligible for directed yield.
259 struct kvm_vcpu_arch arch;
262 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
264 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
268 * Some of the bitops functions do not support too long bitmaps.
269 * This number must be determined not to exceed such limits.
271 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
273 struct kvm_memory_slot {
275 unsigned long npages;
276 unsigned long *dirty_bitmap;
277 struct kvm_arch_memory_slot arch;
278 unsigned long userspace_addr;
283 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
285 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
288 struct kvm_kernel_irq_routing_entry {
291 int (*set)(struct kvm_kernel_irq_routing_entry *e,
292 struct kvm *kvm, int irq_source_id, int level,
301 struct hlist_node link;
304 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
306 struct kvm_irq_routing_table {
307 int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS];
308 struct kvm_kernel_irq_routing_entry *rt_entries;
311 * Array indexed by gsi. Each entry contains list of irq chips
312 * the gsi is connected to.
314 struct hlist_head map[0];
319 struct kvm_irq_routing_table {};
323 #ifndef KVM_PRIVATE_MEM_SLOTS
324 #define KVM_PRIVATE_MEM_SLOTS 0
327 #ifndef KVM_MEM_SLOTS_NUM
328 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
333 * memslots are not sorted by id anymore, please use id_to_memslot()
334 * to get the memslot by its id.
336 struct kvm_memslots {
338 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
339 /* The mapping table from slot id to the index in memslots[]. */
340 short id_to_index[KVM_MEM_SLOTS_NUM];
345 struct mutex slots_lock;
346 struct mm_struct *mm; /* userspace tied to this vm */
347 struct kvm_memslots *memslots;
348 struct srcu_struct srcu;
349 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
352 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
353 atomic_t online_vcpus;
354 int last_boosted_vcpu;
355 struct list_head vm_list;
357 struct kvm_io_bus *buses[KVM_NR_BUSES];
358 #ifdef CONFIG_HAVE_KVM_EVENTFD
361 struct list_head items;
362 struct list_head resampler_list;
363 struct mutex resampler_lock;
365 struct list_head ioeventfds;
367 struct kvm_vm_stat stat;
368 struct kvm_arch arch;
369 atomic_t users_count;
370 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
371 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
372 spinlock_t ring_lock;
373 struct list_head coalesced_zones;
376 struct mutex irq_lock;
377 #ifdef CONFIG_HAVE_KVM_IRQCHIP
379 * Update side is protected by irq_lock and,
380 * if configured, irqfds.lock.
382 struct kvm_irq_routing_table __rcu *irq_routing;
383 struct hlist_head mask_notifier_list;
384 struct hlist_head irq_ack_notifier_list;
387 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
388 struct mmu_notifier mmu_notifier;
389 unsigned long mmu_notifier_seq;
390 long mmu_notifier_count;
393 struct list_head devices;
396 #define kvm_err(fmt, ...) \
397 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
398 #define kvm_info(fmt, ...) \
399 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
400 #define kvm_debug(fmt, ...) \
401 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
402 #define kvm_pr_unimpl(fmt, ...) \
403 pr_err_ratelimited("kvm [%i]: " fmt, \
404 task_tgid_nr(current), ## __VA_ARGS__)
406 /* The guest did something we don't support. */
407 #define vcpu_unimpl(vcpu, fmt, ...) \
408 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
410 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
413 return kvm->vcpus[i];
416 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
418 idx < atomic_read(&kvm->online_vcpus) && \
419 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
422 #define kvm_for_each_memslot(memslot, slots) \
423 for (memslot = &slots->memslots[0]; \
424 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
427 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
428 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
430 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
431 void vcpu_put(struct kvm_vcpu *vcpu);
433 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
434 int kvm_irqfd_init(void);
435 void kvm_irqfd_exit(void);
437 static inline int kvm_irqfd_init(void)
442 static inline void kvm_irqfd_exit(void)
446 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
447 struct module *module);
450 void kvm_get_kvm(struct kvm *kvm);
451 void kvm_put_kvm(struct kvm *kvm);
452 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new,
453 u64 last_generation);
455 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
457 return rcu_dereference_check(kvm->memslots,
458 srcu_read_lock_held(&kvm->srcu)
459 || lockdep_is_held(&kvm->slots_lock));
462 static inline struct kvm_memory_slot *
463 id_to_memslot(struct kvm_memslots *slots, int id)
465 int index = slots->id_to_index[id];
466 struct kvm_memory_slot *slot;
468 slot = &slots->memslots[index];
470 WARN_ON(slot->id != id);
475 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
476 * - create a new memory slot
477 * - delete an existing memory slot
478 * - modify an existing memory slot
479 * -- move it in the guest physical memory space
480 * -- just change its flags
482 * Since flags can be changed by some of these operations, the following
483 * differentiation is the best we can do for __kvm_set_memory_region():
492 int kvm_set_memory_region(struct kvm *kvm,
493 struct kvm_userspace_memory_region *mem);
494 int __kvm_set_memory_region(struct kvm *kvm,
495 struct kvm_userspace_memory_region *mem);
496 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
497 struct kvm_memory_slot *dont);
498 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
499 int kvm_arch_prepare_memory_region(struct kvm *kvm,
500 struct kvm_memory_slot *memslot,
501 struct kvm_userspace_memory_region *mem,
502 enum kvm_mr_change change);
503 void kvm_arch_commit_memory_region(struct kvm *kvm,
504 struct kvm_userspace_memory_region *mem,
505 const struct kvm_memory_slot *old,
506 enum kvm_mr_change change);
507 bool kvm_largepages_enabled(void);
508 void kvm_disable_largepages(void);
509 /* flush all memory translations */
510 void kvm_arch_flush_shadow_all(struct kvm *kvm);
511 /* flush memory translations pointing to 'slot' */
512 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
513 struct kvm_memory_slot *slot);
515 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
518 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
519 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
520 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
521 void kvm_release_page_clean(struct page *page);
522 void kvm_release_page_dirty(struct page *page);
523 void kvm_set_page_dirty(struct page *page);
524 void kvm_set_page_accessed(struct page *page);
526 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
527 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
528 bool write_fault, bool *writable);
529 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
530 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
532 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
533 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
535 void kvm_release_pfn_dirty(pfn_t pfn);
536 void kvm_release_pfn_clean(pfn_t pfn);
537 void kvm_set_pfn_dirty(pfn_t pfn);
538 void kvm_set_pfn_accessed(pfn_t pfn);
539 void kvm_get_pfn(pfn_t pfn);
541 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
543 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
545 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
546 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
547 void *data, unsigned long len);
548 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
549 int offset, int len);
550 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
552 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
553 void *data, unsigned long len);
554 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
555 gpa_t gpa, unsigned long len);
556 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
557 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
558 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
559 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
560 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
561 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
562 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
565 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
566 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
567 bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
568 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
569 void kvm_resched(struct kvm_vcpu *vcpu);
570 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
571 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
573 void kvm_flush_remote_tlbs(struct kvm *kvm);
574 void kvm_reload_remote_mmus(struct kvm *kvm);
575 void kvm_make_mclock_inprogress_request(struct kvm *kvm);
576 void kvm_make_scan_ioapic_request(struct kvm *kvm);
578 long kvm_arch_dev_ioctl(struct file *filp,
579 unsigned int ioctl, unsigned long arg);
580 long kvm_arch_vcpu_ioctl(struct file *filp,
581 unsigned int ioctl, unsigned long arg);
582 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
584 int kvm_dev_ioctl_check_extension(long ext);
586 int kvm_get_dirty_log(struct kvm *kvm,
587 struct kvm_dirty_log *log, int *is_dirty);
588 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
589 struct kvm_dirty_log *log);
591 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
592 struct kvm_userspace_memory_region *mem);
593 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
595 long kvm_arch_vm_ioctl(struct file *filp,
596 unsigned int ioctl, unsigned long arg);
598 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
599 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
601 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
602 struct kvm_translation *tr);
604 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
605 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
606 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
607 struct kvm_sregs *sregs);
608 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
609 struct kvm_sregs *sregs);
610 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
611 struct kvm_mp_state *mp_state);
612 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
613 struct kvm_mp_state *mp_state);
614 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
615 struct kvm_guest_debug *dbg);
616 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
618 int kvm_arch_init(void *opaque);
619 void kvm_arch_exit(void);
621 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
622 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
624 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
625 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
626 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
627 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
628 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
629 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
630 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
632 int kvm_arch_hardware_enable(void *garbage);
633 void kvm_arch_hardware_disable(void *garbage);
634 int kvm_arch_hardware_setup(void);
635 void kvm_arch_hardware_unsetup(void);
636 void kvm_arch_check_processor_compat(void *rtn);
637 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
638 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
640 void kvm_free_physmem(struct kvm *kvm);
642 void *kvm_kvzalloc(unsigned long size);
643 void kvm_kvfree(const void *addr);
645 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
646 static inline struct kvm *kvm_arch_alloc_vm(void)
648 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
651 static inline void kvm_arch_free_vm(struct kvm *kvm)
657 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
659 #ifdef __KVM_HAVE_ARCH_WQP
660 return vcpu->arch.wqp;
666 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
667 void kvm_arch_destroy_vm(struct kvm *kvm);
668 void kvm_arch_sync_events(struct kvm *kvm);
670 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
671 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
673 bool kvm_is_mmio_pfn(pfn_t pfn);
675 struct kvm_irq_ack_notifier {
676 struct hlist_node link;
678 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
681 struct kvm_assigned_dev_kernel {
682 struct kvm_irq_ack_notifier ack_notifier;
683 struct list_head list;
688 unsigned int entries_nr;
690 bool host_irq_disabled;
692 struct msix_entry *host_msix_entries;
694 struct msix_entry *guest_msix_entries;
695 unsigned long irq_requested_type;
700 spinlock_t intx_lock;
701 spinlock_t intx_mask_lock;
703 struct pci_saved_state *pci_saved_state;
706 struct kvm_irq_mask_notifier {
707 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
709 struct hlist_node link;
712 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
713 struct kvm_irq_mask_notifier *kimn);
714 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
715 struct kvm_irq_mask_notifier *kimn);
716 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
719 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
721 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);
722 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
723 int irq_source_id, int level, bool line_status);
724 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
725 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
726 void kvm_register_irq_ack_notifier(struct kvm *kvm,
727 struct kvm_irq_ack_notifier *kian);
728 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
729 struct kvm_irq_ack_notifier *kian);
730 int kvm_request_irq_source_id(struct kvm *kvm);
731 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
733 /* For vcpu->arch.iommu_flags */
734 #define KVM_IOMMU_CACHE_COHERENCY 0x1
736 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
737 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
738 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
739 int kvm_iommu_map_guest(struct kvm *kvm);
740 int kvm_iommu_unmap_guest(struct kvm *kvm);
741 int kvm_assign_device(struct kvm *kvm,
742 struct kvm_assigned_dev_kernel *assigned_dev);
743 int kvm_deassign_device(struct kvm *kvm,
744 struct kvm_assigned_dev_kernel *assigned_dev);
746 static inline int kvm_iommu_map_pages(struct kvm *kvm,
747 struct kvm_memory_slot *slot)
752 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
753 struct kvm_memory_slot *slot)
757 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
763 static inline void __guest_enter(void)
766 * This is running in ioctl context so we can avoid
767 * the call to vtime_account() with its unnecessary idle check.
769 vtime_account_system(current);
770 current->flags |= PF_VCPU;
773 static inline void __guest_exit(void)
776 * This is running in ioctl context so we can avoid
777 * the call to vtime_account() with its unnecessary idle check.
779 vtime_account_system(current);
780 current->flags &= ~PF_VCPU;
783 #ifdef CONFIG_CONTEXT_TRACKING
784 extern void guest_enter(void);
785 extern void guest_exit(void);
787 #else /* !CONFIG_CONTEXT_TRACKING */
788 static inline void guest_enter(void)
793 static inline void guest_exit(void)
797 #endif /* !CONFIG_CONTEXT_TRACKING */
799 static inline void kvm_guest_enter(void)
803 BUG_ON(preemptible());
805 local_irq_save(flags);
807 local_irq_restore(flags);
809 /* KVM does not hold any references to rcu protected data when it
810 * switches CPU into a guest mode. In fact switching to a guest mode
811 * is very similar to exiting to userspase from rcu point of view. In
812 * addition CPU may stay in a guest mode for quite a long time (up to
813 * one time slice). Lets treat guest mode as quiescent state, just like
814 * we do with user-mode execution.
816 rcu_virt_note_context_switch(smp_processor_id());
819 static inline void kvm_guest_exit(void)
823 local_irq_save(flags);
825 local_irq_restore(flags);
829 * search_memslots() and __gfn_to_memslot() are here because they are
830 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
831 * gfn_to_memslot() itself isn't here as an inline because that would
832 * bloat other code too much.
834 static inline struct kvm_memory_slot *
835 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
837 struct kvm_memory_slot *memslot;
839 kvm_for_each_memslot(memslot, slots)
840 if (gfn >= memslot->base_gfn &&
841 gfn < memslot->base_gfn + memslot->npages)
847 static inline struct kvm_memory_slot *
848 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
850 return search_memslots(slots, gfn);
853 static inline unsigned long
854 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
856 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
859 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
861 return gfn_to_memslot(kvm, gfn)->id;
864 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
866 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
867 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
868 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
872 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
874 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
876 return slot->base_gfn + gfn_offset;
879 static inline gpa_t gfn_to_gpa(gfn_t gfn)
881 return (gpa_t)gfn << PAGE_SHIFT;
884 static inline gfn_t gpa_to_gfn(gpa_t gpa)
886 return (gfn_t)(gpa >> PAGE_SHIFT);
889 static inline hpa_t pfn_to_hpa(pfn_t pfn)
891 return (hpa_t)pfn << PAGE_SHIFT;
894 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
896 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
904 struct kvm_stats_debugfs_item {
907 enum kvm_stat_kind kind;
908 struct dentry *dentry;
910 extern struct kvm_stats_debugfs_item debugfs_entries[];
911 extern struct dentry *kvm_debugfs_dir;
913 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
914 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
916 if (unlikely(kvm->mmu_notifier_count))
919 * Ensure the read of mmu_notifier_count happens before the read
920 * of mmu_notifier_seq. This interacts with the smp_wmb() in
921 * mmu_notifier_invalidate_range_end to make sure that the caller
922 * either sees the old (non-zero) value of mmu_notifier_count or
923 * the new (incremented) value of mmu_notifier_seq.
924 * PowerPC Book3s HV KVM calls this under a per-page lock
925 * rather than under kvm->mmu_lock, for scalability, so
926 * can't rely on kvm->mmu_lock to keep things ordered.
929 if (kvm->mmu_notifier_seq != mmu_seq)
935 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
937 #define KVM_MAX_IRQ_ROUTES 1024
939 int kvm_setup_default_irq_routing(struct kvm *kvm);
940 int kvm_set_irq_routing(struct kvm *kvm,
941 const struct kvm_irq_routing_entry *entries,
944 int kvm_set_routing_entry(struct kvm_irq_routing_table *rt,
945 struct kvm_kernel_irq_routing_entry *e,
946 const struct kvm_irq_routing_entry *ue);
947 void kvm_free_irq_routing(struct kvm *kvm);
949 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
953 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
957 #ifdef CONFIG_HAVE_KVM_EVENTFD
959 void kvm_eventfd_init(struct kvm *kvm);
960 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
962 #ifdef CONFIG_HAVE_KVM_IRQCHIP
963 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
964 void kvm_irqfd_release(struct kvm *kvm);
965 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
967 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
972 static inline void kvm_irqfd_release(struct kvm *kvm) {}
977 static inline void kvm_eventfd_init(struct kvm *kvm) {}
979 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
984 static inline void kvm_irqfd_release(struct kvm *kvm) {}
986 #ifdef CONFIG_HAVE_KVM_IRQCHIP
987 static inline void kvm_irq_routing_update(struct kvm *kvm,
988 struct kvm_irq_routing_table *irq_rt)
990 rcu_assign_pointer(kvm->irq_routing, irq_rt);
994 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
999 #endif /* CONFIG_HAVE_KVM_EVENTFD */
1001 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
1002 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
1004 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
1007 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
1011 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
1015 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
1017 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
1020 void kvm_free_all_assigned_devices(struct kvm *kvm);
1024 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
1030 static inline void kvm_free_all_assigned_devices(struct kvm *kvm) {}
1034 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1036 set_bit(req, &vcpu->requests);
1039 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1041 if (test_bit(req, &vcpu->requests)) {
1042 clear_bit(req, &vcpu->requests);
1049 extern bool kvm_rebooting;
1051 struct kvm_device_ops;
1054 struct kvm_device_ops *ops;
1057 struct list_head vm_node;
1060 /* create, destroy, and name are mandatory */
1061 struct kvm_device_ops {
1063 int (*create)(struct kvm_device *dev, u32 type);
1066 * Destroy is responsible for freeing dev.
1068 * Destroy may be called before or after destructors are called
1069 * on emulated I/O regions, depending on whether a reference is
1070 * held by a vcpu or other kvm component that gets destroyed
1071 * after the emulated I/O.
1073 void (*destroy)(struct kvm_device *dev);
1075 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1076 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1077 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1078 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1082 void kvm_device_get(struct kvm_device *dev);
1083 void kvm_device_put(struct kvm_device *dev);
1084 struct kvm_device *kvm_device_from_filp(struct file *filp);
1086 extern struct kvm_device_ops kvm_mpic_ops;
1087 extern struct kvm_device_ops kvm_xics_ops;
1089 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1091 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1093 vcpu->spin_loop.in_spin_loop = val;
1095 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1097 vcpu->spin_loop.dy_eligible = val;
1100 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1102 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1106 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1110 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu)
1115 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */