5 * This work is licensed under the terms of the GNU GPL, version 2. See
6 * the COPYING file in the top-level directory.
9 #include <linux/types.h>
10 #include <linux/hardirq.h>
11 #include <linux/list.h>
12 #include <linux/mutex.h>
13 #include <linux/spinlock.h>
14 #include <linux/signal.h>
15 #include <linux/sched.h>
16 #include <linux/bug.h>
18 #include <linux/mmu_notifier.h>
19 #include <linux/preempt.h>
20 #include <linux/msi.h>
21 #include <linux/slab.h>
22 #include <linux/rcupdate.h>
23 #include <linux/ratelimit.h>
24 #include <linux/err.h>
25 #include <asm/signal.h>
27 #include <linux/kvm.h>
28 #include <linux/kvm_para.h>
30 #include <linux/kvm_types.h>
32 #include <asm/kvm_host.h>
35 #define KVM_MMIO_SIZE 8
39 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
40 * in kvm, other bits are visible for userspace which are defined in
41 * include/linux/kvm_h.
43 #define KVM_MEMSLOT_INVALID (1UL << 16)
45 /* Two fragments for cross MMIO pages. */
46 #define KVM_MAX_MMIO_FRAGMENTS 2
49 * For the normal pfn, the highest 12 bits should be zero,
50 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
51 * mask bit 63 to indicate the noslot pfn.
53 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
54 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
55 #define KVM_PFN_NOSLOT (0x1ULL << 63)
57 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
58 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
59 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
62 * error pfns indicate that the gfn is in slot but faild to
63 * translate it to pfn on host.
65 static inline bool is_error_pfn(pfn_t pfn)
67 return !!(pfn & KVM_PFN_ERR_MASK);
71 * error_noslot pfns indicate that the gfn can not be
72 * translated to pfn - it is not in slot or failed to
73 * translate it to pfn.
75 static inline bool is_error_noslot_pfn(pfn_t pfn)
77 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
80 /* noslot pfn indicates that the gfn is not in slot. */
81 static inline bool is_noslot_pfn(pfn_t pfn)
83 return pfn == KVM_PFN_NOSLOT;
86 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
87 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
89 static inline bool kvm_is_error_hva(unsigned long addr)
91 return addr >= PAGE_OFFSET;
94 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
96 static inline bool is_error_page(struct page *page)
102 * vcpu->requests bit members
104 #define KVM_REQ_TLB_FLUSH 0
105 #define KVM_REQ_MIGRATE_TIMER 1
106 #define KVM_REQ_REPORT_TPR_ACCESS 2
107 #define KVM_REQ_MMU_RELOAD 3
108 #define KVM_REQ_TRIPLE_FAULT 4
109 #define KVM_REQ_PENDING_TIMER 5
110 #define KVM_REQ_UNHALT 6
111 #define KVM_REQ_MMU_SYNC 7
112 #define KVM_REQ_CLOCK_UPDATE 8
113 #define KVM_REQ_KICK 9
114 #define KVM_REQ_DEACTIVATE_FPU 10
115 #define KVM_REQ_EVENT 11
116 #define KVM_REQ_APF_HALT 12
117 #define KVM_REQ_STEAL_UPDATE 13
118 #define KVM_REQ_NMI 14
119 #define KVM_REQ_IMMEDIATE_EXIT 15
120 #define KVM_REQ_PMU 16
121 #define KVM_REQ_PMI 17
122 #define KVM_REQ_WATCHDOG 18
123 #define KVM_REQ_MASTERCLOCK_UPDATE 19
124 #define KVM_REQ_MCLOCK_INPROGRESS 20
126 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
127 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
131 extern struct kmem_cache *kvm_vcpu_cache;
133 struct kvm_io_range {
136 struct kvm_io_device *dev;
139 #define NR_IOBUS_DEVS 1000
143 struct kvm_io_range range[];
152 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
153 int len, const void *val);
154 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
156 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
157 int len, struct kvm_io_device *dev);
158 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
159 struct kvm_io_device *dev);
161 #ifdef CONFIG_KVM_ASYNC_PF
162 struct kvm_async_pf {
163 struct work_struct work;
164 struct list_head link;
165 struct list_head queue;
166 struct kvm_vcpu *vcpu;
167 struct mm_struct *mm;
170 struct kvm_arch_async_pf arch;
175 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
176 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
177 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
178 struct kvm_arch_async_pf *arch);
179 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
186 READING_SHADOW_PAGE_TABLES,
190 * Sometimes a large or cross-page mmio needs to be broken up into separate
191 * exits for userspace servicing.
193 struct kvm_mmio_fragment {
201 #ifdef CONFIG_PREEMPT_NOTIFIERS
202 struct preempt_notifier preempt_notifier;
208 unsigned long requests;
209 unsigned long guest_debug;
215 int guest_fpu_loaded, guest_xcr0_loaded;
216 wait_queue_head_t wq;
220 struct kvm_vcpu_stat stat;
222 #ifdef CONFIG_HAS_IOMEM
224 int mmio_read_completed;
226 int mmio_cur_fragment;
227 int mmio_nr_fragments;
228 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
231 #ifdef CONFIG_KVM_ASYNC_PF
234 struct list_head queue;
235 struct list_head done;
240 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
242 * Cpu relax intercept or pause loop exit optimization
243 * in_spin_loop: set when a vcpu does a pause loop exit
244 * or cpu relax intercepted.
245 * dy_eligible: indicates whether vcpu is eligible for directed yield.
252 struct kvm_vcpu_arch arch;
255 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
257 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
261 * Some of the bitops functions do not support too long bitmaps.
262 * This number must be determined not to exceed such limits.
264 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
266 struct kvm_memory_slot {
268 unsigned long npages;
270 unsigned long *dirty_bitmap;
271 struct kvm_arch_memory_slot arch;
272 unsigned long userspace_addr;
277 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
279 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
282 struct kvm_kernel_irq_routing_entry {
285 int (*set)(struct kvm_kernel_irq_routing_entry *e,
286 struct kvm *kvm, int irq_source_id, int level);
294 struct hlist_node link;
297 #ifdef __KVM_HAVE_IOAPIC
299 struct kvm_irq_routing_table {
300 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
301 struct kvm_kernel_irq_routing_entry *rt_entries;
304 * Array indexed by gsi. Each entry contains list of irq chips
305 * the gsi is connected to.
307 struct hlist_head map[0];
312 struct kvm_irq_routing_table {};
316 #ifndef KVM_MEM_SLOTS_NUM
317 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
322 * memslots are not sorted by id anymore, please use id_to_memslot()
323 * to get the memslot by its id.
325 struct kvm_memslots {
327 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
328 /* The mapping table from slot id to the index in memslots[]. */
329 int id_to_index[KVM_MEM_SLOTS_NUM];
334 struct mutex slots_lock;
335 struct mm_struct *mm; /* userspace tied to this vm */
336 struct kvm_memslots *memslots;
337 struct srcu_struct srcu;
338 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
341 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
342 atomic_t online_vcpus;
343 int last_boosted_vcpu;
344 struct list_head vm_list;
346 struct kvm_io_bus *buses[KVM_NR_BUSES];
347 #ifdef CONFIG_HAVE_KVM_EVENTFD
350 struct list_head items;
351 struct list_head resampler_list;
352 struct mutex resampler_lock;
354 struct list_head ioeventfds;
356 struct kvm_vm_stat stat;
357 struct kvm_arch arch;
358 atomic_t users_count;
359 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
360 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
361 spinlock_t ring_lock;
362 struct list_head coalesced_zones;
365 struct mutex irq_lock;
366 #ifdef CONFIG_HAVE_KVM_IRQCHIP
368 * Update side is protected by irq_lock and,
369 * if configured, irqfds.lock.
371 struct kvm_irq_routing_table __rcu *irq_routing;
372 struct hlist_head mask_notifier_list;
373 struct hlist_head irq_ack_notifier_list;
376 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
377 struct mmu_notifier mmu_notifier;
378 unsigned long mmu_notifier_seq;
379 long mmu_notifier_count;
384 #define kvm_err(fmt, ...) \
385 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
386 #define kvm_info(fmt, ...) \
387 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
388 #define kvm_debug(fmt, ...) \
389 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
390 #define kvm_pr_unimpl(fmt, ...) \
391 pr_err_ratelimited("kvm [%i]: " fmt, \
392 task_tgid_nr(current), ## __VA_ARGS__)
394 /* The guest did something we don't support. */
395 #define vcpu_unimpl(vcpu, fmt, ...) \
396 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
398 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
401 return kvm->vcpus[i];
404 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
406 idx < atomic_read(&kvm->online_vcpus) && \
407 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
410 #define kvm_for_each_memslot(memslot, slots) \
411 for (memslot = &slots->memslots[0]; \
412 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
415 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
416 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
418 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
419 void vcpu_put(struct kvm_vcpu *vcpu);
421 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
422 struct module *module);
425 void kvm_get_kvm(struct kvm *kvm);
426 void kvm_put_kvm(struct kvm *kvm);
427 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
429 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
431 return rcu_dereference_check(kvm->memslots,
432 srcu_read_lock_held(&kvm->srcu)
433 || lockdep_is_held(&kvm->slots_lock));
436 static inline struct kvm_memory_slot *
437 id_to_memslot(struct kvm_memslots *slots, int id)
439 int index = slots->id_to_index[id];
440 struct kvm_memory_slot *slot;
442 slot = &slots->memslots[index];
444 WARN_ON(slot->id != id);
448 int kvm_set_memory_region(struct kvm *kvm,
449 struct kvm_userspace_memory_region *mem,
451 int __kvm_set_memory_region(struct kvm *kvm,
452 struct kvm_userspace_memory_region *mem,
454 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
455 struct kvm_memory_slot *dont);
456 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
457 int kvm_arch_prepare_memory_region(struct kvm *kvm,
458 struct kvm_memory_slot *memslot,
459 struct kvm_memory_slot old,
460 struct kvm_userspace_memory_region *mem,
462 void kvm_arch_commit_memory_region(struct kvm *kvm,
463 struct kvm_userspace_memory_region *mem,
464 struct kvm_memory_slot old,
466 bool kvm_largepages_enabled(void);
467 void kvm_disable_largepages(void);
468 /* flush all memory translations */
469 void kvm_arch_flush_shadow_all(struct kvm *kvm);
470 /* flush memory translations pointing to 'slot' */
471 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
472 struct kvm_memory_slot *slot);
474 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
477 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
478 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
479 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
480 void kvm_release_page_clean(struct page *page);
481 void kvm_release_page_dirty(struct page *page);
482 void kvm_set_page_dirty(struct page *page);
483 void kvm_set_page_accessed(struct page *page);
485 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
486 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
487 bool write_fault, bool *writable);
488 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
489 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
491 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
492 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
494 void kvm_release_pfn_dirty(pfn_t pfn);
495 void kvm_release_pfn_clean(pfn_t pfn);
496 void kvm_set_pfn_dirty(pfn_t pfn);
497 void kvm_set_pfn_accessed(pfn_t pfn);
498 void kvm_get_pfn(pfn_t pfn);
500 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
502 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
504 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
505 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
506 void *data, unsigned long len);
507 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
508 int offset, int len);
509 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
511 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
512 void *data, unsigned long len);
513 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
515 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
516 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
517 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
518 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
519 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
520 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
521 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
524 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
525 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
526 bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
527 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
528 void kvm_resched(struct kvm_vcpu *vcpu);
529 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
530 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
532 void kvm_flush_remote_tlbs(struct kvm *kvm);
533 void kvm_reload_remote_mmus(struct kvm *kvm);
534 void kvm_make_mclock_inprogress_request(struct kvm *kvm);
536 long kvm_arch_dev_ioctl(struct file *filp,
537 unsigned int ioctl, unsigned long arg);
538 long kvm_arch_vcpu_ioctl(struct file *filp,
539 unsigned int ioctl, unsigned long arg);
540 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
542 int kvm_dev_ioctl_check_extension(long ext);
544 int kvm_get_dirty_log(struct kvm *kvm,
545 struct kvm_dirty_log *log, int *is_dirty);
546 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
547 struct kvm_dirty_log *log);
549 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
551 kvm_userspace_memory_region *mem,
553 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level);
554 long kvm_arch_vm_ioctl(struct file *filp,
555 unsigned int ioctl, unsigned long arg);
557 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
558 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
560 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
561 struct kvm_translation *tr);
563 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
564 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
565 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
566 struct kvm_sregs *sregs);
567 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
568 struct kvm_sregs *sregs);
569 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
570 struct kvm_mp_state *mp_state);
571 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
572 struct kvm_mp_state *mp_state);
573 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
574 struct kvm_guest_debug *dbg);
575 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
577 int kvm_arch_init(void *opaque);
578 void kvm_arch_exit(void);
580 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
581 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
583 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
584 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
585 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
586 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
587 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
588 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
589 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
591 int kvm_arch_hardware_enable(void *garbage);
592 void kvm_arch_hardware_disable(void *garbage);
593 int kvm_arch_hardware_setup(void);
594 void kvm_arch_hardware_unsetup(void);
595 void kvm_arch_check_processor_compat(void *rtn);
596 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
597 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
599 void kvm_free_physmem(struct kvm *kvm);
601 void *kvm_kvzalloc(unsigned long size);
602 void kvm_kvfree(const void *addr);
604 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
605 static inline struct kvm *kvm_arch_alloc_vm(void)
607 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
610 static inline void kvm_arch_free_vm(struct kvm *kvm)
616 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
618 #ifdef __KVM_HAVE_ARCH_WQP
619 return vcpu->arch.wqp;
625 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
626 void kvm_arch_destroy_vm(struct kvm *kvm);
627 void kvm_free_all_assigned_devices(struct kvm *kvm);
628 void kvm_arch_sync_events(struct kvm *kvm);
630 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
631 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
633 bool kvm_is_mmio_pfn(pfn_t pfn);
635 struct kvm_irq_ack_notifier {
636 struct hlist_node link;
638 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
641 struct kvm_assigned_dev_kernel {
642 struct kvm_irq_ack_notifier ack_notifier;
643 struct list_head list;
648 unsigned int entries_nr;
650 bool host_irq_disabled;
652 struct msix_entry *host_msix_entries;
654 struct msix_entry *guest_msix_entries;
655 unsigned long irq_requested_type;
660 spinlock_t intx_lock;
661 spinlock_t intx_mask_lock;
663 struct pci_saved_state *pci_saved_state;
666 struct kvm_irq_mask_notifier {
667 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
669 struct hlist_node link;
672 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
673 struct kvm_irq_mask_notifier *kimn);
674 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
675 struct kvm_irq_mask_notifier *kimn);
676 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
679 #ifdef __KVM_HAVE_IOAPIC
680 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
681 union kvm_ioapic_redirect_entry *entry,
682 unsigned long *deliver_bitmask);
684 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
685 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);
686 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
687 int irq_source_id, int level);
688 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
689 void kvm_register_irq_ack_notifier(struct kvm *kvm,
690 struct kvm_irq_ack_notifier *kian);
691 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
692 struct kvm_irq_ack_notifier *kian);
693 int kvm_request_irq_source_id(struct kvm *kvm);
694 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
696 /* For vcpu->arch.iommu_flags */
697 #define KVM_IOMMU_CACHE_COHERENCY 0x1
699 #ifdef CONFIG_IOMMU_API
700 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
701 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
702 int kvm_iommu_map_guest(struct kvm *kvm);
703 int kvm_iommu_unmap_guest(struct kvm *kvm);
704 int kvm_assign_device(struct kvm *kvm,
705 struct kvm_assigned_dev_kernel *assigned_dev);
706 int kvm_deassign_device(struct kvm *kvm,
707 struct kvm_assigned_dev_kernel *assigned_dev);
708 #else /* CONFIG_IOMMU_API */
709 static inline int kvm_iommu_map_pages(struct kvm *kvm,
710 struct kvm_memory_slot *slot)
715 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
716 struct kvm_memory_slot *slot)
720 static inline int kvm_iommu_map_guest(struct kvm *kvm)
725 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
730 static inline int kvm_assign_device(struct kvm *kvm,
731 struct kvm_assigned_dev_kernel *assigned_dev)
736 static inline int kvm_deassign_device(struct kvm *kvm,
737 struct kvm_assigned_dev_kernel *assigned_dev)
741 #endif /* CONFIG_IOMMU_API */
743 static inline void kvm_guest_enter(void)
745 BUG_ON(preemptible());
747 * This is running in ioctl context so we can avoid
748 * the call to vtime_account() with its unnecessary idle check.
750 vtime_account_system_irqsafe(current);
751 current->flags |= PF_VCPU;
752 /* KVM does not hold any references to rcu protected data when it
753 * switches CPU into a guest mode. In fact switching to a guest mode
754 * is very similar to exiting to userspase from rcu point of view. In
755 * addition CPU may stay in a guest mode for quite a long time (up to
756 * one time slice). Lets treat guest mode as quiescent state, just like
757 * we do with user-mode execution.
759 rcu_virt_note_context_switch(smp_processor_id());
762 static inline void kvm_guest_exit(void)
765 * This is running in ioctl context so we can avoid
766 * the call to vtime_account() with its unnecessary idle check.
768 vtime_account_system_irqsafe(current);
769 current->flags &= ~PF_VCPU;
773 * search_memslots() and __gfn_to_memslot() are here because they are
774 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
775 * gfn_to_memslot() itself isn't here as an inline because that would
776 * bloat other code too much.
778 static inline struct kvm_memory_slot *
779 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
781 struct kvm_memory_slot *memslot;
783 kvm_for_each_memslot(memslot, slots)
784 if (gfn >= memslot->base_gfn &&
785 gfn < memslot->base_gfn + memslot->npages)
791 static inline struct kvm_memory_slot *
792 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
794 return search_memslots(slots, gfn);
797 static inline unsigned long
798 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
800 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
803 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
805 return gfn_to_memslot(kvm, gfn)->id;
808 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
810 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
811 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
812 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
816 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
818 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
820 return slot->base_gfn + gfn_offset;
823 static inline gpa_t gfn_to_gpa(gfn_t gfn)
825 return (gpa_t)gfn << PAGE_SHIFT;
828 static inline gfn_t gpa_to_gfn(gpa_t gpa)
830 return (gfn_t)(gpa >> PAGE_SHIFT);
833 static inline hpa_t pfn_to_hpa(pfn_t pfn)
835 return (hpa_t)pfn << PAGE_SHIFT;
838 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
840 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
848 struct kvm_stats_debugfs_item {
851 enum kvm_stat_kind kind;
852 struct dentry *dentry;
854 extern struct kvm_stats_debugfs_item debugfs_entries[];
855 extern struct dentry *kvm_debugfs_dir;
857 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
858 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
860 if (unlikely(kvm->mmu_notifier_count))
863 * Ensure the read of mmu_notifier_count happens before the read
864 * of mmu_notifier_seq. This interacts with the smp_wmb() in
865 * mmu_notifier_invalidate_range_end to make sure that the caller
866 * either sees the old (non-zero) value of mmu_notifier_count or
867 * the new (incremented) value of mmu_notifier_seq.
868 * PowerPC Book3s HV KVM calls this under a per-page lock
869 * rather than under kvm->mmu_lock, for scalability, so
870 * can't rely on kvm->mmu_lock to keep things ordered.
873 if (kvm->mmu_notifier_seq != mmu_seq)
879 #ifdef KVM_CAP_IRQ_ROUTING
881 #define KVM_MAX_IRQ_ROUTES 1024
883 int kvm_setup_default_irq_routing(struct kvm *kvm);
884 int kvm_set_irq_routing(struct kvm *kvm,
885 const struct kvm_irq_routing_entry *entries,
888 void kvm_free_irq_routing(struct kvm *kvm);
890 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
894 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
898 #ifdef CONFIG_HAVE_KVM_EVENTFD
900 void kvm_eventfd_init(struct kvm *kvm);
901 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
903 #ifdef CONFIG_HAVE_KVM_IRQCHIP
904 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
905 void kvm_irqfd_release(struct kvm *kvm);
906 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
908 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
913 static inline void kvm_irqfd_release(struct kvm *kvm) {}
918 static inline void kvm_eventfd_init(struct kvm *kvm) {}
920 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
925 static inline void kvm_irqfd_release(struct kvm *kvm) {}
927 #ifdef CONFIG_HAVE_KVM_IRQCHIP
928 static inline void kvm_irq_routing_update(struct kvm *kvm,
929 struct kvm_irq_routing_table *irq_rt)
931 rcu_assign_pointer(kvm->irq_routing, irq_rt);
935 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
940 #endif /* CONFIG_HAVE_KVM_EVENTFD */
942 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
943 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
945 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
948 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
952 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
956 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
958 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
963 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
971 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
973 set_bit(req, &vcpu->requests);
976 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
978 if (test_bit(req, &vcpu->requests)) {
979 clear_bit(req, &vcpu->requests);
986 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
988 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
990 vcpu->spin_loop.in_spin_loop = val;
992 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
994 vcpu->spin_loop.dy_eligible = val;
997 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
999 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1003 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1007 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu)
1012 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */