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>
17 #include <linux/mmu_notifier.h>
18 #include <linux/preempt.h>
19 #include <linux/msi.h>
20 #include <linux/slab.h>
21 #include <linux/rcupdate.h>
22 #include <linux/ratelimit.h>
23 #include <asm/signal.h>
25 #include <linux/kvm.h>
26 #include <linux/kvm_para.h>
28 #include <linux/kvm_types.h>
30 #include <asm/kvm_host.h>
33 #define KVM_MMIO_SIZE 8
37 * vcpu->requests bit members
39 #define KVM_REQ_TLB_FLUSH 0
40 #define KVM_REQ_MIGRATE_TIMER 1
41 #define KVM_REQ_REPORT_TPR_ACCESS 2
42 #define KVM_REQ_MMU_RELOAD 3
43 #define KVM_REQ_TRIPLE_FAULT 4
44 #define KVM_REQ_PENDING_TIMER 5
45 #define KVM_REQ_UNHALT 6
46 #define KVM_REQ_MMU_SYNC 7
47 #define KVM_REQ_CLOCK_UPDATE 8
48 #define KVM_REQ_KICK 9
49 #define KVM_REQ_DEACTIVATE_FPU 10
50 #define KVM_REQ_EVENT 11
51 #define KVM_REQ_APF_HALT 12
52 #define KVM_REQ_STEAL_UPDATE 13
53 #define KVM_REQ_NMI 14
54 #define KVM_REQ_IMMEDIATE_EXIT 15
55 #define KVM_REQ_PMU 16
56 #define KVM_REQ_PMI 17
58 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
62 extern struct kmem_cache *kvm_vcpu_cache;
67 struct kvm_io_device *dev;
72 #define NR_IOBUS_DEVS 300
73 struct kvm_io_range range[NR_IOBUS_DEVS];
82 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
83 int len, const void *val);
84 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
86 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
87 int len, struct kvm_io_device *dev);
88 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
89 struct kvm_io_device *dev);
91 #ifdef CONFIG_KVM_ASYNC_PF
93 struct work_struct work;
94 struct list_head link;
95 struct list_head queue;
96 struct kvm_vcpu *vcpu;
100 struct kvm_arch_async_pf arch;
105 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
106 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
107 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
108 struct kvm_arch_async_pf *arch);
109 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
120 #ifdef CONFIG_PREEMPT_NOTIFIERS
121 struct preempt_notifier preempt_notifier;
127 unsigned long requests;
128 unsigned long guest_debug;
134 int guest_fpu_loaded, guest_xcr0_loaded;
135 wait_queue_head_t wq;
139 struct kvm_vcpu_stat stat;
141 #ifdef CONFIG_HAS_IOMEM
143 int mmio_read_completed;
147 unsigned char mmio_data[KVM_MMIO_SIZE];
148 gpa_t mmio_phys_addr;
151 #ifdef CONFIG_KVM_ASYNC_PF
154 struct list_head queue;
155 struct list_head done;
160 struct kvm_vcpu_arch arch;
163 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
165 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
169 * Some of the bitops functions do not support too long bitmaps.
170 * This number must be determined not to exceed such limits.
172 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
174 struct kvm_memory_slot {
176 unsigned long npages;
179 unsigned long *dirty_bitmap;
180 unsigned long *dirty_bitmap_head;
181 unsigned long nr_dirty_pages;
182 struct kvm_arch_memory_slot arch;
183 unsigned long userspace_addr;
188 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
190 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
193 struct kvm_kernel_irq_routing_entry {
196 int (*set)(struct kvm_kernel_irq_routing_entry *e,
197 struct kvm *kvm, int irq_source_id, int level);
205 struct hlist_node link;
208 #ifdef __KVM_HAVE_IOAPIC
210 struct kvm_irq_routing_table {
211 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
212 struct kvm_kernel_irq_routing_entry *rt_entries;
215 * Array indexed by gsi. Each entry contains list of irq chips
216 * the gsi is connected to.
218 struct hlist_head map[0];
223 struct kvm_irq_routing_table {};
227 #ifndef KVM_MEM_SLOTS_NUM
228 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
233 * memslots are not sorted by id anymore, please use id_to_memslot()
234 * to get the memslot by its id.
236 struct kvm_memslots {
238 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
239 /* The mapping table from slot id to the index in memslots[]. */
240 int id_to_index[KVM_MEM_SLOTS_NUM];
245 struct mutex slots_lock;
246 struct mm_struct *mm; /* userspace tied to this vm */
247 struct kvm_memslots *memslots;
248 struct srcu_struct srcu;
249 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
252 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
253 atomic_t online_vcpus;
254 int last_boosted_vcpu;
255 struct list_head vm_list;
257 struct kvm_io_bus *buses[KVM_NR_BUSES];
258 #ifdef CONFIG_HAVE_KVM_EVENTFD
261 struct list_head items;
263 struct list_head ioeventfds;
265 struct kvm_vm_stat stat;
266 struct kvm_arch arch;
267 atomic_t users_count;
268 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
269 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
270 spinlock_t ring_lock;
271 struct list_head coalesced_zones;
274 struct mutex irq_lock;
275 #ifdef CONFIG_HAVE_KVM_IRQCHIP
277 * Update side is protected by irq_lock and,
278 * if configured, irqfds.lock.
280 struct kvm_irq_routing_table __rcu *irq_routing;
281 struct hlist_head mask_notifier_list;
282 struct hlist_head irq_ack_notifier_list;
285 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
286 struct mmu_notifier mmu_notifier;
287 unsigned long mmu_notifier_seq;
288 long mmu_notifier_count;
293 /* The guest did something we don't support. */
294 #define pr_unimpl(vcpu, fmt, ...) \
295 pr_err_ratelimited("kvm: %i: cpu%i " fmt, \
296 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__)
298 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
299 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
301 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
304 return kvm->vcpus[i];
307 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
309 idx < atomic_read(&kvm->online_vcpus) && \
310 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
313 #define kvm_for_each_memslot(memslot, slots) \
314 for (memslot = &slots->memslots[0]; \
315 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
318 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
319 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
321 void vcpu_load(struct kvm_vcpu *vcpu);
322 void vcpu_put(struct kvm_vcpu *vcpu);
324 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
325 struct module *module);
328 void kvm_get_kvm(struct kvm *kvm);
329 void kvm_put_kvm(struct kvm *kvm);
330 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
332 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
334 return rcu_dereference_check(kvm->memslots,
335 srcu_read_lock_held(&kvm->srcu)
336 || lockdep_is_held(&kvm->slots_lock));
339 static inline struct kvm_memory_slot *
340 id_to_memslot(struct kvm_memslots *slots, int id)
342 int index = slots->id_to_index[id];
343 struct kvm_memory_slot *slot;
345 slot = &slots->memslots[index];
347 WARN_ON(slot->id != id);
351 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
352 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
353 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
355 extern struct page *bad_page;
356 extern struct page *fault_page;
358 extern pfn_t bad_pfn;
359 extern pfn_t fault_pfn;
361 int is_error_page(struct page *page);
362 int is_error_pfn(pfn_t pfn);
363 int is_hwpoison_pfn(pfn_t pfn);
364 int is_fault_pfn(pfn_t pfn);
365 int is_noslot_pfn(pfn_t pfn);
366 int is_invalid_pfn(pfn_t pfn);
367 int kvm_is_error_hva(unsigned long addr);
368 int kvm_set_memory_region(struct kvm *kvm,
369 struct kvm_userspace_memory_region *mem,
371 int __kvm_set_memory_region(struct kvm *kvm,
372 struct kvm_userspace_memory_region *mem,
374 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
375 struct kvm_memory_slot *dont);
376 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
377 int kvm_arch_prepare_memory_region(struct kvm *kvm,
378 struct kvm_memory_slot *memslot,
379 struct kvm_memory_slot old,
380 struct kvm_userspace_memory_region *mem,
382 void kvm_arch_commit_memory_region(struct kvm *kvm,
383 struct kvm_userspace_memory_region *mem,
384 struct kvm_memory_slot old,
386 bool kvm_largepages_enabled(void);
387 void kvm_disable_largepages(void);
388 void kvm_arch_flush_shadow(struct kvm *kvm);
390 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
393 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
394 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
395 void kvm_release_page_clean(struct page *page);
396 void kvm_release_page_dirty(struct page *page);
397 void kvm_set_page_dirty(struct page *page);
398 void kvm_set_page_accessed(struct page *page);
400 pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr);
401 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
402 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
403 bool write_fault, bool *writable);
404 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
405 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
407 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
408 struct kvm_memory_slot *slot, gfn_t gfn);
409 void kvm_release_pfn_dirty(pfn_t);
410 void kvm_release_pfn_clean(pfn_t pfn);
411 void kvm_set_pfn_dirty(pfn_t pfn);
412 void kvm_set_pfn_accessed(pfn_t pfn);
413 void kvm_get_pfn(pfn_t pfn);
415 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
417 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
419 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
420 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
421 void *data, unsigned long len);
422 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
423 int offset, int len);
424 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
426 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
427 void *data, unsigned long len);
428 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
430 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
431 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
432 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
433 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
434 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
435 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
436 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
439 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
440 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
441 void kvm_resched(struct kvm_vcpu *vcpu);
442 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
443 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
445 void kvm_flush_remote_tlbs(struct kvm *kvm);
446 void kvm_reload_remote_mmus(struct kvm *kvm);
448 long kvm_arch_dev_ioctl(struct file *filp,
449 unsigned int ioctl, unsigned long arg);
450 long kvm_arch_vcpu_ioctl(struct file *filp,
451 unsigned int ioctl, unsigned long arg);
452 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
454 int kvm_dev_ioctl_check_extension(long ext);
456 int kvm_get_dirty_log(struct kvm *kvm,
457 struct kvm_dirty_log *log, int *is_dirty);
458 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
459 struct kvm_dirty_log *log);
461 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
463 kvm_userspace_memory_region *mem,
465 long kvm_arch_vm_ioctl(struct file *filp,
466 unsigned int ioctl, unsigned long arg);
468 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
469 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
471 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
472 struct kvm_translation *tr);
474 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
475 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
476 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
477 struct kvm_sregs *sregs);
478 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
479 struct kvm_sregs *sregs);
480 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
481 struct kvm_mp_state *mp_state);
482 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
483 struct kvm_mp_state *mp_state);
484 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
485 struct kvm_guest_debug *dbg);
486 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
488 int kvm_arch_init(void *opaque);
489 void kvm_arch_exit(void);
491 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
492 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
494 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
495 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
496 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
497 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
498 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
499 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
501 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
502 int kvm_arch_hardware_enable(void *garbage);
503 void kvm_arch_hardware_disable(void *garbage);
504 int kvm_arch_hardware_setup(void);
505 void kvm_arch_hardware_unsetup(void);
506 void kvm_arch_check_processor_compat(void *rtn);
507 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
509 void kvm_free_physmem(struct kvm *kvm);
511 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
512 static inline struct kvm *kvm_arch_alloc_vm(void)
514 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
517 static inline void kvm_arch_free_vm(struct kvm *kvm)
523 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
524 void kvm_arch_destroy_vm(struct kvm *kvm);
525 void kvm_free_all_assigned_devices(struct kvm *kvm);
526 void kvm_arch_sync_events(struct kvm *kvm);
528 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
529 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
531 int kvm_is_mmio_pfn(pfn_t pfn);
533 struct kvm_irq_ack_notifier {
534 struct hlist_node link;
536 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
539 struct kvm_assigned_dev_kernel {
540 struct kvm_irq_ack_notifier ack_notifier;
541 struct list_head list;
546 unsigned int entries_nr;
548 bool host_irq_disabled;
550 struct msix_entry *host_msix_entries;
552 struct msix_entry *guest_msix_entries;
553 unsigned long irq_requested_type;
558 spinlock_t intx_lock;
559 struct mutex intx_mask_lock;
561 struct pci_saved_state *pci_saved_state;
564 struct kvm_irq_mask_notifier {
565 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
567 struct hlist_node link;
570 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
571 struct kvm_irq_mask_notifier *kimn);
572 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
573 struct kvm_irq_mask_notifier *kimn);
574 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
577 #ifdef __KVM_HAVE_IOAPIC
578 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
579 union kvm_ioapic_redirect_entry *entry,
580 unsigned long *deliver_bitmask);
582 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
583 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
584 int irq_source_id, int level);
585 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
586 void kvm_register_irq_ack_notifier(struct kvm *kvm,
587 struct kvm_irq_ack_notifier *kian);
588 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
589 struct kvm_irq_ack_notifier *kian);
590 int kvm_request_irq_source_id(struct kvm *kvm);
591 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
593 /* For vcpu->arch.iommu_flags */
594 #define KVM_IOMMU_CACHE_COHERENCY 0x1
596 #ifdef CONFIG_IOMMU_API
597 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
598 int kvm_iommu_map_guest(struct kvm *kvm);
599 int kvm_iommu_unmap_guest(struct kvm *kvm);
600 int kvm_assign_device(struct kvm *kvm,
601 struct kvm_assigned_dev_kernel *assigned_dev);
602 int kvm_deassign_device(struct kvm *kvm,
603 struct kvm_assigned_dev_kernel *assigned_dev);
604 #else /* CONFIG_IOMMU_API */
605 static inline int kvm_iommu_map_pages(struct kvm *kvm,
606 struct kvm_memory_slot *slot)
611 static inline int kvm_iommu_map_guest(struct kvm *kvm)
616 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
621 static inline int kvm_assign_device(struct kvm *kvm,
622 struct kvm_assigned_dev_kernel *assigned_dev)
627 static inline int kvm_deassign_device(struct kvm *kvm,
628 struct kvm_assigned_dev_kernel *assigned_dev)
632 #endif /* CONFIG_IOMMU_API */
634 static inline void kvm_guest_enter(void)
636 BUG_ON(preemptible());
637 account_system_vtime(current);
638 current->flags |= PF_VCPU;
639 /* KVM does not hold any references to rcu protected data when it
640 * switches CPU into a guest mode. In fact switching to a guest mode
641 * is very similar to exiting to userspase from rcu point of view. In
642 * addition CPU may stay in a guest mode for quite a long time (up to
643 * one time slice). Lets treat guest mode as quiescent state, just like
644 * we do with user-mode execution.
646 rcu_virt_note_context_switch(smp_processor_id());
649 static inline void kvm_guest_exit(void)
651 account_system_vtime(current);
652 current->flags &= ~PF_VCPU;
656 * search_memslots() and __gfn_to_memslot() are here because they are
657 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
658 * gfn_to_memslot() itself isn't here as an inline because that would
659 * bloat other code too much.
661 static inline struct kvm_memory_slot *
662 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
664 struct kvm_memory_slot *memslot;
666 kvm_for_each_memslot(memslot, slots)
667 if (gfn >= memslot->base_gfn &&
668 gfn < memslot->base_gfn + memslot->npages)
674 static inline struct kvm_memory_slot *
675 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
677 return search_memslots(slots, gfn);
680 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
682 return gfn_to_memslot(kvm, gfn)->id;
685 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
687 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
688 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
689 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
692 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
695 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
698 static inline gpa_t gfn_to_gpa(gfn_t gfn)
700 return (gpa_t)gfn << PAGE_SHIFT;
703 static inline gfn_t gpa_to_gfn(gpa_t gpa)
705 return (gfn_t)(gpa >> PAGE_SHIFT);
708 static inline hpa_t pfn_to_hpa(pfn_t pfn)
710 return (hpa_t)pfn << PAGE_SHIFT;
713 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
715 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
723 struct kvm_stats_debugfs_item {
726 enum kvm_stat_kind kind;
727 struct dentry *dentry;
729 extern struct kvm_stats_debugfs_item debugfs_entries[];
730 extern struct dentry *kvm_debugfs_dir;
732 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
733 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
735 if (unlikely(vcpu->kvm->mmu_notifier_count))
738 * Ensure the read of mmu_notifier_count happens before the read
739 * of mmu_notifier_seq. This interacts with the smp_wmb() in
740 * mmu_notifier_invalidate_range_end to make sure that the caller
741 * either sees the old (non-zero) value of mmu_notifier_count or
742 * the new (incremented) value of mmu_notifier_seq.
743 * PowerPC Book3s HV KVM calls this under a per-page lock
744 * rather than under kvm->mmu_lock, for scalability, so
745 * can't rely on kvm->mmu_lock to keep things ordered.
748 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
754 #ifdef CONFIG_HAVE_KVM_IRQCHIP
756 #define KVM_MAX_IRQ_ROUTES 1024
758 int kvm_setup_default_irq_routing(struct kvm *kvm);
759 int kvm_set_irq_routing(struct kvm *kvm,
760 const struct kvm_irq_routing_entry *entries,
763 void kvm_free_irq_routing(struct kvm *kvm);
767 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
771 #ifdef CONFIG_HAVE_KVM_EVENTFD
773 void kvm_eventfd_init(struct kvm *kvm);
774 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
775 void kvm_irqfd_release(struct kvm *kvm);
776 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
777 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
781 static inline void kvm_eventfd_init(struct kvm *kvm) {}
783 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
788 static inline void kvm_irqfd_release(struct kvm *kvm) {}
790 #ifdef CONFIG_HAVE_KVM_IRQCHIP
791 static inline void kvm_irq_routing_update(struct kvm *kvm,
792 struct kvm_irq_routing_table *irq_rt)
794 rcu_assign_pointer(kvm->irq_routing, irq_rt);
798 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
803 #endif /* CONFIG_HAVE_KVM_EVENTFD */
805 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
806 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
808 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
811 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
815 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
819 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
821 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
826 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
834 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
836 set_bit(req, &vcpu->requests);
839 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
841 if (test_bit(req, &vcpu->requests)) {
842 clear_bit(req, &vcpu->requests);