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 <asm/signal.h>
26 #include <linux/kvm.h>
27 #include <linux/kvm_para.h>
29 #include <linux/kvm_types.h>
31 #include <asm/kvm_host.h>
34 #define KVM_MMIO_SIZE 8
38 * If we support unaligned MMIO, at most one fragment will be split into two:
40 #ifdef KVM_UNALIGNED_MMIO
41 # define KVM_EXTRA_MMIO_FRAGMENTS 1
43 # define KVM_EXTRA_MMIO_FRAGMENTS 0
46 #define KVM_USER_MMIO_SIZE 8
48 #define KVM_MAX_MMIO_FRAGMENTS \
49 (KVM_MMIO_SIZE / KVM_USER_MMIO_SIZE + KVM_EXTRA_MMIO_FRAGMENTS)
51 #define KVM_PFN_ERR_FAULT (-EFAULT)
52 #define KVM_PFN_ERR_HWPOISON (-EHWPOISON)
53 #define KVM_PFN_ERR_BAD (-ENOENT)
56 * vcpu->requests bit members
58 #define KVM_REQ_TLB_FLUSH 0
59 #define KVM_REQ_MIGRATE_TIMER 1
60 #define KVM_REQ_REPORT_TPR_ACCESS 2
61 #define KVM_REQ_MMU_RELOAD 3
62 #define KVM_REQ_TRIPLE_FAULT 4
63 #define KVM_REQ_PENDING_TIMER 5
64 #define KVM_REQ_UNHALT 6
65 #define KVM_REQ_MMU_SYNC 7
66 #define KVM_REQ_CLOCK_UPDATE 8
67 #define KVM_REQ_KICK 9
68 #define KVM_REQ_DEACTIVATE_FPU 10
69 #define KVM_REQ_EVENT 11
70 #define KVM_REQ_APF_HALT 12
71 #define KVM_REQ_STEAL_UPDATE 13
72 #define KVM_REQ_NMI 14
73 #define KVM_REQ_IMMEDIATE_EXIT 15
74 #define KVM_REQ_PMU 16
75 #define KVM_REQ_PMI 17
77 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
81 extern struct kmem_cache *kvm_vcpu_cache;
86 struct kvm_io_device *dev;
89 #define NR_IOBUS_DEVS 1000
93 struct kvm_io_range range[];
102 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
103 int len, const void *val);
104 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
106 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
107 int len, struct kvm_io_device *dev);
108 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
109 struct kvm_io_device *dev);
111 #ifdef CONFIG_KVM_ASYNC_PF
112 struct kvm_async_pf {
113 struct work_struct work;
114 struct list_head link;
115 struct list_head queue;
116 struct kvm_vcpu *vcpu;
117 struct mm_struct *mm;
120 struct kvm_arch_async_pf arch;
125 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
126 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
127 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
128 struct kvm_arch_async_pf *arch);
129 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
136 READING_SHADOW_PAGE_TABLES,
140 * Sometimes a large or cross-page mmio needs to be broken up into separate
141 * exits for userspace servicing.
143 struct kvm_mmio_fragment {
151 #ifdef CONFIG_PREEMPT_NOTIFIERS
152 struct preempt_notifier preempt_notifier;
158 unsigned long requests;
159 unsigned long guest_debug;
165 int guest_fpu_loaded, guest_xcr0_loaded;
166 wait_queue_head_t wq;
170 struct kvm_vcpu_stat stat;
172 #ifdef CONFIG_HAS_IOMEM
174 int mmio_read_completed;
176 int mmio_cur_fragment;
177 int mmio_nr_fragments;
178 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
181 #ifdef CONFIG_KVM_ASYNC_PF
184 struct list_head queue;
185 struct list_head done;
190 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
192 * Cpu relax intercept or pause loop exit optimization
193 * in_spin_loop: set when a vcpu does a pause loop exit
194 * or cpu relax intercepted.
195 * dy_eligible: indicates whether vcpu is eligible for directed yield.
202 struct kvm_vcpu_arch arch;
205 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
207 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
211 * Some of the bitops functions do not support too long bitmaps.
212 * This number must be determined not to exceed such limits.
214 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
216 struct kvm_memory_slot {
218 unsigned long npages;
220 unsigned long *dirty_bitmap;
221 struct kvm_arch_memory_slot arch;
222 unsigned long userspace_addr;
227 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
229 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
232 struct kvm_kernel_irq_routing_entry {
235 int (*set)(struct kvm_kernel_irq_routing_entry *e,
236 struct kvm *kvm, int irq_source_id, int level);
244 struct hlist_node link;
247 #ifdef __KVM_HAVE_IOAPIC
249 struct kvm_irq_routing_table {
250 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
251 struct kvm_kernel_irq_routing_entry *rt_entries;
254 * Array indexed by gsi. Each entry contains list of irq chips
255 * the gsi is connected to.
257 struct hlist_head map[0];
262 struct kvm_irq_routing_table {};
266 #ifndef KVM_MEM_SLOTS_NUM
267 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
272 * memslots are not sorted by id anymore, please use id_to_memslot()
273 * to get the memslot by its id.
275 struct kvm_memslots {
277 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
278 /* The mapping table from slot id to the index in memslots[]. */
279 int id_to_index[KVM_MEM_SLOTS_NUM];
284 struct mutex slots_lock;
285 struct mm_struct *mm; /* userspace tied to this vm */
286 struct kvm_memslots *memslots;
287 struct srcu_struct srcu;
288 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
291 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
292 atomic_t online_vcpus;
293 int last_boosted_vcpu;
294 struct list_head vm_list;
296 struct kvm_io_bus *buses[KVM_NR_BUSES];
297 #ifdef CONFIG_HAVE_KVM_EVENTFD
300 struct list_head items;
302 struct list_head ioeventfds;
304 struct kvm_vm_stat stat;
305 struct kvm_arch arch;
306 atomic_t users_count;
307 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
308 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
309 spinlock_t ring_lock;
310 struct list_head coalesced_zones;
313 struct mutex irq_lock;
314 #ifdef CONFIG_HAVE_KVM_IRQCHIP
316 * Update side is protected by irq_lock and,
317 * if configured, irqfds.lock.
319 struct kvm_irq_routing_table __rcu *irq_routing;
320 struct hlist_head mask_notifier_list;
321 struct hlist_head irq_ack_notifier_list;
324 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
325 struct mmu_notifier mmu_notifier;
326 unsigned long mmu_notifier_seq;
327 long mmu_notifier_count;
332 #define kvm_err(fmt, ...) \
333 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
334 #define kvm_info(fmt, ...) \
335 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
336 #define kvm_debug(fmt, ...) \
337 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
338 #define kvm_pr_unimpl(fmt, ...) \
339 pr_err_ratelimited("kvm [%i]: " fmt, \
340 task_tgid_nr(current), ## __VA_ARGS__)
342 /* The guest did something we don't support. */
343 #define vcpu_unimpl(vcpu, fmt, ...) \
344 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
346 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
349 return kvm->vcpus[i];
352 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
354 idx < atomic_read(&kvm->online_vcpus) && \
355 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
358 #define kvm_for_each_memslot(memslot, slots) \
359 for (memslot = &slots->memslots[0]; \
360 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
363 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
364 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
366 void vcpu_load(struct kvm_vcpu *vcpu);
367 void vcpu_put(struct kvm_vcpu *vcpu);
369 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
370 struct module *module);
373 void kvm_get_kvm(struct kvm *kvm);
374 void kvm_put_kvm(struct kvm *kvm);
375 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
377 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
379 return rcu_dereference_check(kvm->memslots,
380 srcu_read_lock_held(&kvm->srcu)
381 || lockdep_is_held(&kvm->slots_lock));
384 static inline struct kvm_memory_slot *
385 id_to_memslot(struct kvm_memslots *slots, int id)
387 int index = slots->id_to_index[id];
388 struct kvm_memory_slot *slot;
390 slot = &slots->memslots[index];
392 WARN_ON(slot->id != id);
396 extern struct page *bad_page;
398 int is_error_page(struct page *page);
399 int is_error_pfn(pfn_t pfn);
400 int is_noslot_pfn(pfn_t pfn);
401 int is_invalid_pfn(pfn_t pfn);
402 int kvm_is_error_hva(unsigned long addr);
403 int kvm_set_memory_region(struct kvm *kvm,
404 struct kvm_userspace_memory_region *mem,
406 int __kvm_set_memory_region(struct kvm *kvm,
407 struct kvm_userspace_memory_region *mem,
409 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
410 struct kvm_memory_slot *dont);
411 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
412 int kvm_arch_prepare_memory_region(struct kvm *kvm,
413 struct kvm_memory_slot *memslot,
414 struct kvm_memory_slot old,
415 struct kvm_userspace_memory_region *mem,
417 void kvm_arch_commit_memory_region(struct kvm *kvm,
418 struct kvm_userspace_memory_region *mem,
419 struct kvm_memory_slot old,
421 bool kvm_largepages_enabled(void);
422 void kvm_disable_largepages(void);
423 void kvm_arch_flush_shadow(struct kvm *kvm);
425 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
428 struct page *get_bad_page(void);
429 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
430 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
431 void kvm_release_page_clean(struct page *page);
432 void kvm_release_page_dirty(struct page *page);
433 void kvm_set_page_dirty(struct page *page);
434 void kvm_set_page_accessed(struct page *page);
436 pfn_t hva_to_pfn_atomic(unsigned long addr);
437 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
438 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
439 bool write_fault, bool *writable);
440 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
441 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
443 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
444 void kvm_release_pfn_dirty(pfn_t);
445 void kvm_release_pfn_clean(pfn_t pfn);
446 void kvm_set_pfn_dirty(pfn_t pfn);
447 void kvm_set_pfn_accessed(pfn_t pfn);
448 void kvm_get_pfn(pfn_t pfn);
450 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
452 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
454 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
455 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
456 void *data, unsigned long len);
457 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
458 int offset, int len);
459 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
461 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
462 void *data, unsigned long len);
463 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
465 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
466 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
467 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
468 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
469 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
470 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
471 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
474 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
475 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
476 bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
477 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
478 void kvm_resched(struct kvm_vcpu *vcpu);
479 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
480 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
482 void kvm_flush_remote_tlbs(struct kvm *kvm);
483 void kvm_reload_remote_mmus(struct kvm *kvm);
485 long kvm_arch_dev_ioctl(struct file *filp,
486 unsigned int ioctl, unsigned long arg);
487 long kvm_arch_vcpu_ioctl(struct file *filp,
488 unsigned int ioctl, unsigned long arg);
489 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
491 int kvm_dev_ioctl_check_extension(long ext);
493 int kvm_get_dirty_log(struct kvm *kvm,
494 struct kvm_dirty_log *log, int *is_dirty);
495 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
496 struct kvm_dirty_log *log);
498 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
500 kvm_userspace_memory_region *mem,
502 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level);
503 long kvm_arch_vm_ioctl(struct file *filp,
504 unsigned int ioctl, unsigned long arg);
506 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
507 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
509 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
510 struct kvm_translation *tr);
512 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
513 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
514 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
515 struct kvm_sregs *sregs);
516 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
517 struct kvm_sregs *sregs);
518 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
519 struct kvm_mp_state *mp_state);
520 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
521 struct kvm_mp_state *mp_state);
522 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
523 struct kvm_guest_debug *dbg);
524 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
526 int kvm_arch_init(void *opaque);
527 void kvm_arch_exit(void);
529 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
530 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
532 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
533 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
534 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
535 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
536 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
537 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
539 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
540 int kvm_arch_hardware_enable(void *garbage);
541 void kvm_arch_hardware_disable(void *garbage);
542 int kvm_arch_hardware_setup(void);
543 void kvm_arch_hardware_unsetup(void);
544 void kvm_arch_check_processor_compat(void *rtn);
545 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
546 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
548 void kvm_free_physmem(struct kvm *kvm);
550 void *kvm_kvzalloc(unsigned long size);
551 void kvm_kvfree(const void *addr);
553 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
554 static inline struct kvm *kvm_arch_alloc_vm(void)
556 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
559 static inline void kvm_arch_free_vm(struct kvm *kvm)
565 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
567 #ifdef __KVM_HAVE_ARCH_WQP
568 return vcpu->arch.wqp;
574 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
575 void kvm_arch_destroy_vm(struct kvm *kvm);
576 void kvm_free_all_assigned_devices(struct kvm *kvm);
577 void kvm_arch_sync_events(struct kvm *kvm);
579 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
580 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
582 bool kvm_is_mmio_pfn(pfn_t pfn);
584 struct kvm_irq_ack_notifier {
585 struct hlist_node link;
587 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
590 struct kvm_assigned_dev_kernel {
591 struct kvm_irq_ack_notifier ack_notifier;
592 struct list_head list;
597 unsigned int entries_nr;
599 bool host_irq_disabled;
601 struct msix_entry *host_msix_entries;
603 struct msix_entry *guest_msix_entries;
604 unsigned long irq_requested_type;
609 spinlock_t intx_lock;
610 spinlock_t intx_mask_lock;
612 struct pci_saved_state *pci_saved_state;
615 struct kvm_irq_mask_notifier {
616 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
618 struct hlist_node link;
621 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
622 struct kvm_irq_mask_notifier *kimn);
623 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
624 struct kvm_irq_mask_notifier *kimn);
625 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
628 #ifdef __KVM_HAVE_IOAPIC
629 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
630 union kvm_ioapic_redirect_entry *entry,
631 unsigned long *deliver_bitmask);
633 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
634 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
635 int irq_source_id, int level);
636 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
637 void kvm_register_irq_ack_notifier(struct kvm *kvm,
638 struct kvm_irq_ack_notifier *kian);
639 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
640 struct kvm_irq_ack_notifier *kian);
641 int kvm_request_irq_source_id(struct kvm *kvm);
642 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
644 /* For vcpu->arch.iommu_flags */
645 #define KVM_IOMMU_CACHE_COHERENCY 0x1
647 #ifdef CONFIG_IOMMU_API
648 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
649 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
650 int kvm_iommu_map_guest(struct kvm *kvm);
651 int kvm_iommu_unmap_guest(struct kvm *kvm);
652 int kvm_assign_device(struct kvm *kvm,
653 struct kvm_assigned_dev_kernel *assigned_dev);
654 int kvm_deassign_device(struct kvm *kvm,
655 struct kvm_assigned_dev_kernel *assigned_dev);
656 #else /* CONFIG_IOMMU_API */
657 static inline int kvm_iommu_map_pages(struct kvm *kvm,
658 struct kvm_memory_slot *slot)
663 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
664 struct kvm_memory_slot *slot)
668 static inline int kvm_iommu_map_guest(struct kvm *kvm)
673 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
678 static inline int kvm_assign_device(struct kvm *kvm,
679 struct kvm_assigned_dev_kernel *assigned_dev)
684 static inline int kvm_deassign_device(struct kvm *kvm,
685 struct kvm_assigned_dev_kernel *assigned_dev)
689 #endif /* CONFIG_IOMMU_API */
691 static inline void kvm_guest_enter(void)
693 BUG_ON(preemptible());
694 account_system_vtime(current);
695 current->flags |= PF_VCPU;
696 /* KVM does not hold any references to rcu protected data when it
697 * switches CPU into a guest mode. In fact switching to a guest mode
698 * is very similar to exiting to userspase from rcu point of view. In
699 * addition CPU may stay in a guest mode for quite a long time (up to
700 * one time slice). Lets treat guest mode as quiescent state, just like
701 * we do with user-mode execution.
703 rcu_virt_note_context_switch(smp_processor_id());
706 static inline void kvm_guest_exit(void)
708 account_system_vtime(current);
709 current->flags &= ~PF_VCPU;
713 * search_memslots() and __gfn_to_memslot() are here because they are
714 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
715 * gfn_to_memslot() itself isn't here as an inline because that would
716 * bloat other code too much.
718 static inline struct kvm_memory_slot *
719 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
721 struct kvm_memory_slot *memslot;
723 kvm_for_each_memslot(memslot, slots)
724 if (gfn >= memslot->base_gfn &&
725 gfn < memslot->base_gfn + memslot->npages)
731 static inline struct kvm_memory_slot *
732 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
734 return search_memslots(slots, gfn);
737 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
739 return gfn_to_memslot(kvm, gfn)->id;
742 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
744 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
745 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
746 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
750 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
752 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
754 return slot->base_gfn + gfn_offset;
757 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
760 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
763 static inline gpa_t gfn_to_gpa(gfn_t gfn)
765 return (gpa_t)gfn << PAGE_SHIFT;
768 static inline gfn_t gpa_to_gfn(gpa_t gpa)
770 return (gfn_t)(gpa >> PAGE_SHIFT);
773 static inline hpa_t pfn_to_hpa(pfn_t pfn)
775 return (hpa_t)pfn << PAGE_SHIFT;
778 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
780 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
788 struct kvm_stats_debugfs_item {
791 enum kvm_stat_kind kind;
792 struct dentry *dentry;
794 extern struct kvm_stats_debugfs_item debugfs_entries[];
795 extern struct dentry *kvm_debugfs_dir;
797 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
798 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
800 if (unlikely(vcpu->kvm->mmu_notifier_count))
803 * Ensure the read of mmu_notifier_count happens before the read
804 * of mmu_notifier_seq. This interacts with the smp_wmb() in
805 * mmu_notifier_invalidate_range_end to make sure that the caller
806 * either sees the old (non-zero) value of mmu_notifier_count or
807 * the new (incremented) value of mmu_notifier_seq.
808 * PowerPC Book3s HV KVM calls this under a per-page lock
809 * rather than under kvm->mmu_lock, for scalability, so
810 * can't rely on kvm->mmu_lock to keep things ordered.
813 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
819 #ifdef KVM_CAP_IRQ_ROUTING
821 #define KVM_MAX_IRQ_ROUTES 1024
823 int kvm_setup_default_irq_routing(struct kvm *kvm);
824 int kvm_set_irq_routing(struct kvm *kvm,
825 const struct kvm_irq_routing_entry *entries,
828 void kvm_free_irq_routing(struct kvm *kvm);
830 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
834 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
838 #ifdef CONFIG_HAVE_KVM_EVENTFD
840 void kvm_eventfd_init(struct kvm *kvm);
841 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
842 void kvm_irqfd_release(struct kvm *kvm);
843 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
844 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
848 static inline void kvm_eventfd_init(struct kvm *kvm) {}
850 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
855 static inline void kvm_irqfd_release(struct kvm *kvm) {}
857 #ifdef CONFIG_HAVE_KVM_IRQCHIP
858 static inline void kvm_irq_routing_update(struct kvm *kvm,
859 struct kvm_irq_routing_table *irq_rt)
861 rcu_assign_pointer(kvm->irq_routing, irq_rt);
865 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
870 #endif /* CONFIG_HAVE_KVM_EVENTFD */
872 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
873 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
875 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
878 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
882 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
886 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
888 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
893 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
901 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
903 set_bit(req, &vcpu->requests);
906 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
908 if (test_bit(req, &vcpu->requests)) {
909 clear_bit(req, &vcpu->requests);
916 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
918 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
920 vcpu->spin_loop.in_spin_loop = val;
922 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
924 vcpu->spin_loop.dy_eligible = val;
927 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
929 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
933 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
937 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu)
942 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */