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 * If we support unaligned MMIO, at most one fragment will be split into two:
41 #ifdef KVM_UNALIGNED_MMIO
42 # define KVM_EXTRA_MMIO_FRAGMENTS 1
44 # define KVM_EXTRA_MMIO_FRAGMENTS 0
47 #define KVM_USER_MMIO_SIZE 8
49 #define KVM_MAX_MMIO_FRAGMENTS \
50 (KVM_MMIO_SIZE / KVM_USER_MMIO_SIZE + KVM_EXTRA_MMIO_FRAGMENTS)
52 #define KVM_PFN_ERR_FAULT (-EFAULT)
53 #define KVM_PFN_ERR_HWPOISON (-EHWPOISON)
54 #define KVM_PFN_ERR_BAD (-ENOENT)
56 static inline int is_error_pfn(pfn_t pfn)
58 return IS_ERR_VALUE(pfn);
61 static inline int is_noslot_pfn(pfn_t pfn)
63 return pfn == -ENOENT;
66 static inline int is_invalid_pfn(pfn_t pfn)
68 return !is_noslot_pfn(pfn) && is_error_pfn(pfn);
71 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
73 static inline int is_error_page(struct page *page)
79 * vcpu->requests bit members
81 #define KVM_REQ_TLB_FLUSH 0
82 #define KVM_REQ_MIGRATE_TIMER 1
83 #define KVM_REQ_REPORT_TPR_ACCESS 2
84 #define KVM_REQ_MMU_RELOAD 3
85 #define KVM_REQ_TRIPLE_FAULT 4
86 #define KVM_REQ_PENDING_TIMER 5
87 #define KVM_REQ_UNHALT 6
88 #define KVM_REQ_MMU_SYNC 7
89 #define KVM_REQ_CLOCK_UPDATE 8
90 #define KVM_REQ_KICK 9
91 #define KVM_REQ_DEACTIVATE_FPU 10
92 #define KVM_REQ_EVENT 11
93 #define KVM_REQ_APF_HALT 12
94 #define KVM_REQ_STEAL_UPDATE 13
95 #define KVM_REQ_NMI 14
96 #define KVM_REQ_IMMEDIATE_EXIT 15
97 #define KVM_REQ_PMU 16
98 #define KVM_REQ_PMI 17
100 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
104 extern struct kmem_cache *kvm_vcpu_cache;
106 struct kvm_io_range {
109 struct kvm_io_device *dev;
112 #define NR_IOBUS_DEVS 1000
116 struct kvm_io_range range[];
125 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
126 int len, const void *val);
127 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
129 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
130 int len, struct kvm_io_device *dev);
131 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
132 struct kvm_io_device *dev);
134 #ifdef CONFIG_KVM_ASYNC_PF
135 struct kvm_async_pf {
136 struct work_struct work;
137 struct list_head link;
138 struct list_head queue;
139 struct kvm_vcpu *vcpu;
140 struct mm_struct *mm;
143 struct kvm_arch_async_pf arch;
148 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
149 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
150 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
151 struct kvm_arch_async_pf *arch);
152 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
159 READING_SHADOW_PAGE_TABLES,
163 * Sometimes a large or cross-page mmio needs to be broken up into separate
164 * exits for userspace servicing.
166 struct kvm_mmio_fragment {
174 #ifdef CONFIG_PREEMPT_NOTIFIERS
175 struct preempt_notifier preempt_notifier;
181 unsigned long requests;
182 unsigned long guest_debug;
188 int guest_fpu_loaded, guest_xcr0_loaded;
189 wait_queue_head_t wq;
193 struct kvm_vcpu_stat stat;
195 #ifdef CONFIG_HAS_IOMEM
197 int mmio_read_completed;
199 int mmio_cur_fragment;
200 int mmio_nr_fragments;
201 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
204 #ifdef CONFIG_KVM_ASYNC_PF
207 struct list_head queue;
208 struct list_head done;
213 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
215 * Cpu relax intercept or pause loop exit optimization
216 * in_spin_loop: set when a vcpu does a pause loop exit
217 * or cpu relax intercepted.
218 * dy_eligible: indicates whether vcpu is eligible for directed yield.
225 struct kvm_vcpu_arch arch;
228 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
230 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
234 * Some of the bitops functions do not support too long bitmaps.
235 * This number must be determined not to exceed such limits.
237 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
239 struct kvm_memory_slot {
241 unsigned long npages;
243 unsigned long *dirty_bitmap;
244 struct kvm_arch_memory_slot arch;
245 unsigned long userspace_addr;
250 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
252 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
255 struct kvm_kernel_irq_routing_entry {
258 int (*set)(struct kvm_kernel_irq_routing_entry *e,
259 struct kvm *kvm, int irq_source_id, int level);
267 struct hlist_node link;
270 #ifdef __KVM_HAVE_IOAPIC
272 struct kvm_irq_routing_table {
273 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
274 struct kvm_kernel_irq_routing_entry *rt_entries;
277 * Array indexed by gsi. Each entry contains list of irq chips
278 * the gsi is connected to.
280 struct hlist_head map[0];
285 struct kvm_irq_routing_table {};
289 #ifndef KVM_MEM_SLOTS_NUM
290 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
295 * memslots are not sorted by id anymore, please use id_to_memslot()
296 * to get the memslot by its id.
298 struct kvm_memslots {
300 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
301 /* The mapping table from slot id to the index in memslots[]. */
302 int id_to_index[KVM_MEM_SLOTS_NUM];
307 struct mutex slots_lock;
308 struct mm_struct *mm; /* userspace tied to this vm */
309 struct kvm_memslots *memslots;
310 struct srcu_struct srcu;
311 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
314 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
315 atomic_t online_vcpus;
316 int last_boosted_vcpu;
317 struct list_head vm_list;
319 struct kvm_io_bus *buses[KVM_NR_BUSES];
320 #ifdef CONFIG_HAVE_KVM_EVENTFD
323 struct list_head items;
325 struct list_head ioeventfds;
327 struct kvm_vm_stat stat;
328 struct kvm_arch arch;
329 atomic_t users_count;
330 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
331 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
332 spinlock_t ring_lock;
333 struct list_head coalesced_zones;
336 struct mutex irq_lock;
337 #ifdef CONFIG_HAVE_KVM_IRQCHIP
339 * Update side is protected by irq_lock and,
340 * if configured, irqfds.lock.
342 struct kvm_irq_routing_table __rcu *irq_routing;
343 struct hlist_head mask_notifier_list;
344 struct hlist_head irq_ack_notifier_list;
347 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
348 struct mmu_notifier mmu_notifier;
349 unsigned long mmu_notifier_seq;
350 long mmu_notifier_count;
355 #define kvm_err(fmt, ...) \
356 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
357 #define kvm_info(fmt, ...) \
358 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
359 #define kvm_debug(fmt, ...) \
360 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
361 #define kvm_pr_unimpl(fmt, ...) \
362 pr_err_ratelimited("kvm [%i]: " fmt, \
363 task_tgid_nr(current), ## __VA_ARGS__)
365 /* The guest did something we don't support. */
366 #define vcpu_unimpl(vcpu, fmt, ...) \
367 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
369 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
372 return kvm->vcpus[i];
375 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
377 idx < atomic_read(&kvm->online_vcpus) && \
378 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
381 #define kvm_for_each_memslot(memslot, slots) \
382 for (memslot = &slots->memslots[0]; \
383 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
386 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
387 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
389 void vcpu_load(struct kvm_vcpu *vcpu);
390 void vcpu_put(struct kvm_vcpu *vcpu);
392 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
393 struct module *module);
396 void kvm_get_kvm(struct kvm *kvm);
397 void kvm_put_kvm(struct kvm *kvm);
398 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
400 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
402 return rcu_dereference_check(kvm->memslots,
403 srcu_read_lock_held(&kvm->srcu)
404 || lockdep_is_held(&kvm->slots_lock));
407 static inline struct kvm_memory_slot *
408 id_to_memslot(struct kvm_memslots *slots, int id)
410 int index = slots->id_to_index[id];
411 struct kvm_memory_slot *slot;
413 slot = &slots->memslots[index];
415 WARN_ON(slot->id != id);
419 int kvm_is_error_hva(unsigned long addr);
420 int kvm_set_memory_region(struct kvm *kvm,
421 struct kvm_userspace_memory_region *mem,
423 int __kvm_set_memory_region(struct kvm *kvm,
424 struct kvm_userspace_memory_region *mem,
426 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
427 struct kvm_memory_slot *dont);
428 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
429 int kvm_arch_prepare_memory_region(struct kvm *kvm,
430 struct kvm_memory_slot *memslot,
431 struct kvm_memory_slot old,
432 struct kvm_userspace_memory_region *mem,
434 void kvm_arch_commit_memory_region(struct kvm *kvm,
435 struct kvm_userspace_memory_region *mem,
436 struct kvm_memory_slot old,
438 bool kvm_largepages_enabled(void);
439 void kvm_disable_largepages(void);
440 void kvm_arch_flush_shadow(struct kvm *kvm);
442 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
445 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
446 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
447 void kvm_release_page_clean(struct page *page);
448 void kvm_release_page_dirty(struct page *page);
449 void kvm_set_page_dirty(struct page *page);
450 void kvm_set_page_accessed(struct page *page);
452 pfn_t hva_to_pfn_atomic(unsigned long addr);
453 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
454 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
455 bool write_fault, bool *writable);
456 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
457 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
459 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
460 void kvm_release_pfn_dirty(pfn_t pfn);
461 void kvm_release_pfn_clean(pfn_t pfn);
462 void kvm_set_pfn_dirty(pfn_t pfn);
463 void kvm_set_pfn_accessed(pfn_t pfn);
464 void kvm_get_pfn(pfn_t pfn);
466 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
468 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
470 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
471 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
472 void *data, unsigned long len);
473 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
474 int offset, int len);
475 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
477 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
478 void *data, unsigned long len);
479 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
481 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
482 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
483 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
484 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
485 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
486 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
487 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
490 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
491 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
492 bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
493 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
494 void kvm_resched(struct kvm_vcpu *vcpu);
495 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
496 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
498 void kvm_flush_remote_tlbs(struct kvm *kvm);
499 void kvm_reload_remote_mmus(struct kvm *kvm);
501 long kvm_arch_dev_ioctl(struct file *filp,
502 unsigned int ioctl, unsigned long arg);
503 long kvm_arch_vcpu_ioctl(struct file *filp,
504 unsigned int ioctl, unsigned long arg);
505 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
507 int kvm_dev_ioctl_check_extension(long ext);
509 int kvm_get_dirty_log(struct kvm *kvm,
510 struct kvm_dirty_log *log, int *is_dirty);
511 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
512 struct kvm_dirty_log *log);
514 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
516 kvm_userspace_memory_region *mem,
518 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level);
519 long kvm_arch_vm_ioctl(struct file *filp,
520 unsigned int ioctl, unsigned long arg);
522 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
523 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
525 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
526 struct kvm_translation *tr);
528 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
529 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
530 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
531 struct kvm_sregs *sregs);
532 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
533 struct kvm_sregs *sregs);
534 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
535 struct kvm_mp_state *mp_state);
536 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
537 struct kvm_mp_state *mp_state);
538 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
539 struct kvm_guest_debug *dbg);
540 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
542 int kvm_arch_init(void *opaque);
543 void kvm_arch_exit(void);
545 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
546 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
548 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
549 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
550 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
551 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
552 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
553 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
555 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
556 int kvm_arch_hardware_enable(void *garbage);
557 void kvm_arch_hardware_disable(void *garbage);
558 int kvm_arch_hardware_setup(void);
559 void kvm_arch_hardware_unsetup(void);
560 void kvm_arch_check_processor_compat(void *rtn);
561 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
562 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
564 void kvm_free_physmem(struct kvm *kvm);
566 void *kvm_kvzalloc(unsigned long size);
567 void kvm_kvfree(const void *addr);
569 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
570 static inline struct kvm *kvm_arch_alloc_vm(void)
572 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
575 static inline void kvm_arch_free_vm(struct kvm *kvm)
581 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
583 #ifdef __KVM_HAVE_ARCH_WQP
584 return vcpu->arch.wqp;
590 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
591 void kvm_arch_destroy_vm(struct kvm *kvm);
592 void kvm_free_all_assigned_devices(struct kvm *kvm);
593 void kvm_arch_sync_events(struct kvm *kvm);
595 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
596 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
598 bool kvm_is_mmio_pfn(pfn_t pfn);
600 struct kvm_irq_ack_notifier {
601 struct hlist_node link;
603 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
606 struct kvm_assigned_dev_kernel {
607 struct kvm_irq_ack_notifier ack_notifier;
608 struct list_head list;
613 unsigned int entries_nr;
615 bool host_irq_disabled;
617 struct msix_entry *host_msix_entries;
619 struct msix_entry *guest_msix_entries;
620 unsigned long irq_requested_type;
625 spinlock_t intx_lock;
626 spinlock_t intx_mask_lock;
628 struct pci_saved_state *pci_saved_state;
631 struct kvm_irq_mask_notifier {
632 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
634 struct hlist_node link;
637 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
638 struct kvm_irq_mask_notifier *kimn);
639 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
640 struct kvm_irq_mask_notifier *kimn);
641 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
644 #ifdef __KVM_HAVE_IOAPIC
645 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
646 union kvm_ioapic_redirect_entry *entry,
647 unsigned long *deliver_bitmask);
649 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
650 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
651 int irq_source_id, int level);
652 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
653 void kvm_register_irq_ack_notifier(struct kvm *kvm,
654 struct kvm_irq_ack_notifier *kian);
655 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
656 struct kvm_irq_ack_notifier *kian);
657 int kvm_request_irq_source_id(struct kvm *kvm);
658 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
660 /* For vcpu->arch.iommu_flags */
661 #define KVM_IOMMU_CACHE_COHERENCY 0x1
663 #ifdef CONFIG_IOMMU_API
664 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
665 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
666 int kvm_iommu_map_guest(struct kvm *kvm);
667 int kvm_iommu_unmap_guest(struct kvm *kvm);
668 int kvm_assign_device(struct kvm *kvm,
669 struct kvm_assigned_dev_kernel *assigned_dev);
670 int kvm_deassign_device(struct kvm *kvm,
671 struct kvm_assigned_dev_kernel *assigned_dev);
672 #else /* CONFIG_IOMMU_API */
673 static inline int kvm_iommu_map_pages(struct kvm *kvm,
674 struct kvm_memory_slot *slot)
679 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
680 struct kvm_memory_slot *slot)
684 static inline int kvm_iommu_map_guest(struct kvm *kvm)
689 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
694 static inline int kvm_assign_device(struct kvm *kvm,
695 struct kvm_assigned_dev_kernel *assigned_dev)
700 static inline int kvm_deassign_device(struct kvm *kvm,
701 struct kvm_assigned_dev_kernel *assigned_dev)
705 #endif /* CONFIG_IOMMU_API */
707 static inline void kvm_guest_enter(void)
709 BUG_ON(preemptible());
710 account_system_vtime(current);
711 current->flags |= PF_VCPU;
712 /* KVM does not hold any references to rcu protected data when it
713 * switches CPU into a guest mode. In fact switching to a guest mode
714 * is very similar to exiting to userspase from rcu point of view. In
715 * addition CPU may stay in a guest mode for quite a long time (up to
716 * one time slice). Lets treat guest mode as quiescent state, just like
717 * we do with user-mode execution.
719 rcu_virt_note_context_switch(smp_processor_id());
722 static inline void kvm_guest_exit(void)
724 account_system_vtime(current);
725 current->flags &= ~PF_VCPU;
729 * search_memslots() and __gfn_to_memslot() are here because they are
730 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
731 * gfn_to_memslot() itself isn't here as an inline because that would
732 * bloat other code too much.
734 static inline struct kvm_memory_slot *
735 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
737 struct kvm_memory_slot *memslot;
739 kvm_for_each_memslot(memslot, slots)
740 if (gfn >= memslot->base_gfn &&
741 gfn < memslot->base_gfn + memslot->npages)
747 static inline struct kvm_memory_slot *
748 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
750 return search_memslots(slots, gfn);
753 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
755 return gfn_to_memslot(kvm, gfn)->id;
758 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
760 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
761 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
762 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
766 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
768 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
770 return slot->base_gfn + gfn_offset;
773 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
776 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
779 static inline gpa_t gfn_to_gpa(gfn_t gfn)
781 return (gpa_t)gfn << PAGE_SHIFT;
784 static inline gfn_t gpa_to_gfn(gpa_t gpa)
786 return (gfn_t)(gpa >> PAGE_SHIFT);
789 static inline hpa_t pfn_to_hpa(pfn_t pfn)
791 return (hpa_t)pfn << PAGE_SHIFT;
794 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
796 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
804 struct kvm_stats_debugfs_item {
807 enum kvm_stat_kind kind;
808 struct dentry *dentry;
810 extern struct kvm_stats_debugfs_item debugfs_entries[];
811 extern struct dentry *kvm_debugfs_dir;
813 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
814 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
816 if (unlikely(vcpu->kvm->mmu_notifier_count))
819 * Ensure the read of mmu_notifier_count happens before the read
820 * of mmu_notifier_seq. This interacts with the smp_wmb() in
821 * mmu_notifier_invalidate_range_end to make sure that the caller
822 * either sees the old (non-zero) value of mmu_notifier_count or
823 * the new (incremented) value of mmu_notifier_seq.
824 * PowerPC Book3s HV KVM calls this under a per-page lock
825 * rather than under kvm->mmu_lock, for scalability, so
826 * can't rely on kvm->mmu_lock to keep things ordered.
829 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
835 #ifdef KVM_CAP_IRQ_ROUTING
837 #define KVM_MAX_IRQ_ROUTES 1024
839 int kvm_setup_default_irq_routing(struct kvm *kvm);
840 int kvm_set_irq_routing(struct kvm *kvm,
841 const struct kvm_irq_routing_entry *entries,
844 void kvm_free_irq_routing(struct kvm *kvm);
846 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
850 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
854 #ifdef CONFIG_HAVE_KVM_EVENTFD
856 void kvm_eventfd_init(struct kvm *kvm);
857 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
858 void kvm_irqfd_release(struct kvm *kvm);
859 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
860 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
864 static inline void kvm_eventfd_init(struct kvm *kvm) {}
866 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
871 static inline void kvm_irqfd_release(struct kvm *kvm) {}
873 #ifdef CONFIG_HAVE_KVM_IRQCHIP
874 static inline void kvm_irq_routing_update(struct kvm *kvm,
875 struct kvm_irq_routing_table *irq_rt)
877 rcu_assign_pointer(kvm->irq_routing, irq_rt);
881 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
886 #endif /* CONFIG_HAVE_KVM_EVENTFD */
888 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
889 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
891 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
894 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
898 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
902 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
904 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
909 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
917 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
919 set_bit(req, &vcpu->requests);
922 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
924 if (test_bit(req, &vcpu->requests)) {
925 clear_bit(req, &vcpu->requests);
932 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
934 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
936 vcpu->spin_loop.in_spin_loop = val;
938 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
940 vcpu->spin_loop.dy_eligible = val;
943 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
945 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
949 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
953 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu)
958 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */