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);
72 * vcpu->requests bit members
74 #define KVM_REQ_TLB_FLUSH 0
75 #define KVM_REQ_MIGRATE_TIMER 1
76 #define KVM_REQ_REPORT_TPR_ACCESS 2
77 #define KVM_REQ_MMU_RELOAD 3
78 #define KVM_REQ_TRIPLE_FAULT 4
79 #define KVM_REQ_PENDING_TIMER 5
80 #define KVM_REQ_UNHALT 6
81 #define KVM_REQ_MMU_SYNC 7
82 #define KVM_REQ_CLOCK_UPDATE 8
83 #define KVM_REQ_KICK 9
84 #define KVM_REQ_DEACTIVATE_FPU 10
85 #define KVM_REQ_EVENT 11
86 #define KVM_REQ_APF_HALT 12
87 #define KVM_REQ_STEAL_UPDATE 13
88 #define KVM_REQ_NMI 14
89 #define KVM_REQ_IMMEDIATE_EXIT 15
90 #define KVM_REQ_PMU 16
91 #define KVM_REQ_PMI 17
93 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
97 extern struct kmem_cache *kvm_vcpu_cache;
102 struct kvm_io_device *dev;
105 #define NR_IOBUS_DEVS 1000
109 struct kvm_io_range range[];
118 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
119 int len, const void *val);
120 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
122 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
123 int len, struct kvm_io_device *dev);
124 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
125 struct kvm_io_device *dev);
127 #ifdef CONFIG_KVM_ASYNC_PF
128 struct kvm_async_pf {
129 struct work_struct work;
130 struct list_head link;
131 struct list_head queue;
132 struct kvm_vcpu *vcpu;
133 struct mm_struct *mm;
136 struct kvm_arch_async_pf arch;
141 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
142 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
143 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
144 struct kvm_arch_async_pf *arch);
145 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
152 READING_SHADOW_PAGE_TABLES,
156 * Sometimes a large or cross-page mmio needs to be broken up into separate
157 * exits for userspace servicing.
159 struct kvm_mmio_fragment {
167 #ifdef CONFIG_PREEMPT_NOTIFIERS
168 struct preempt_notifier preempt_notifier;
174 unsigned long requests;
175 unsigned long guest_debug;
181 int guest_fpu_loaded, guest_xcr0_loaded;
182 wait_queue_head_t wq;
186 struct kvm_vcpu_stat stat;
188 #ifdef CONFIG_HAS_IOMEM
190 int mmio_read_completed;
192 int mmio_cur_fragment;
193 int mmio_nr_fragments;
194 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
197 #ifdef CONFIG_KVM_ASYNC_PF
200 struct list_head queue;
201 struct list_head done;
206 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
208 * Cpu relax intercept or pause loop exit optimization
209 * in_spin_loop: set when a vcpu does a pause loop exit
210 * or cpu relax intercepted.
211 * dy_eligible: indicates whether vcpu is eligible for directed yield.
218 struct kvm_vcpu_arch arch;
221 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
223 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
227 * Some of the bitops functions do not support too long bitmaps.
228 * This number must be determined not to exceed such limits.
230 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
232 struct kvm_memory_slot {
234 unsigned long npages;
236 unsigned long *dirty_bitmap;
237 struct kvm_arch_memory_slot arch;
238 unsigned long userspace_addr;
243 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
245 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
248 struct kvm_kernel_irq_routing_entry {
251 int (*set)(struct kvm_kernel_irq_routing_entry *e,
252 struct kvm *kvm, int irq_source_id, int level);
260 struct hlist_node link;
263 #ifdef __KVM_HAVE_IOAPIC
265 struct kvm_irq_routing_table {
266 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
267 struct kvm_kernel_irq_routing_entry *rt_entries;
270 * Array indexed by gsi. Each entry contains list of irq chips
271 * the gsi is connected to.
273 struct hlist_head map[0];
278 struct kvm_irq_routing_table {};
282 #ifndef KVM_MEM_SLOTS_NUM
283 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
288 * memslots are not sorted by id anymore, please use id_to_memslot()
289 * to get the memslot by its id.
291 struct kvm_memslots {
293 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
294 /* The mapping table from slot id to the index in memslots[]. */
295 int id_to_index[KVM_MEM_SLOTS_NUM];
300 struct mutex slots_lock;
301 struct mm_struct *mm; /* userspace tied to this vm */
302 struct kvm_memslots *memslots;
303 struct srcu_struct srcu;
304 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
307 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
308 atomic_t online_vcpus;
309 int last_boosted_vcpu;
310 struct list_head vm_list;
312 struct kvm_io_bus *buses[KVM_NR_BUSES];
313 #ifdef CONFIG_HAVE_KVM_EVENTFD
316 struct list_head items;
318 struct list_head ioeventfds;
320 struct kvm_vm_stat stat;
321 struct kvm_arch arch;
322 atomic_t users_count;
323 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
324 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
325 spinlock_t ring_lock;
326 struct list_head coalesced_zones;
329 struct mutex irq_lock;
330 #ifdef CONFIG_HAVE_KVM_IRQCHIP
332 * Update side is protected by irq_lock and,
333 * if configured, irqfds.lock.
335 struct kvm_irq_routing_table __rcu *irq_routing;
336 struct hlist_head mask_notifier_list;
337 struct hlist_head irq_ack_notifier_list;
340 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
341 struct mmu_notifier mmu_notifier;
342 unsigned long mmu_notifier_seq;
343 long mmu_notifier_count;
348 #define kvm_err(fmt, ...) \
349 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
350 #define kvm_info(fmt, ...) \
351 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
352 #define kvm_debug(fmt, ...) \
353 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
354 #define kvm_pr_unimpl(fmt, ...) \
355 pr_err_ratelimited("kvm [%i]: " fmt, \
356 task_tgid_nr(current), ## __VA_ARGS__)
358 /* The guest did something we don't support. */
359 #define vcpu_unimpl(vcpu, fmt, ...) \
360 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
362 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
365 return kvm->vcpus[i];
368 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
370 idx < atomic_read(&kvm->online_vcpus) && \
371 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
374 #define kvm_for_each_memslot(memslot, slots) \
375 for (memslot = &slots->memslots[0]; \
376 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
379 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
380 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
382 void vcpu_load(struct kvm_vcpu *vcpu);
383 void vcpu_put(struct kvm_vcpu *vcpu);
385 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
386 struct module *module);
389 void kvm_get_kvm(struct kvm *kvm);
390 void kvm_put_kvm(struct kvm *kvm);
391 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
393 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
395 return rcu_dereference_check(kvm->memslots,
396 srcu_read_lock_held(&kvm->srcu)
397 || lockdep_is_held(&kvm->slots_lock));
400 static inline struct kvm_memory_slot *
401 id_to_memslot(struct kvm_memslots *slots, int id)
403 int index = slots->id_to_index[id];
404 struct kvm_memory_slot *slot;
406 slot = &slots->memslots[index];
408 WARN_ON(slot->id != id);
412 int is_error_page(struct page *page);
413 int kvm_is_error_hva(unsigned long addr);
414 int kvm_set_memory_region(struct kvm *kvm,
415 struct kvm_userspace_memory_region *mem,
417 int __kvm_set_memory_region(struct kvm *kvm,
418 struct kvm_userspace_memory_region *mem,
420 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
421 struct kvm_memory_slot *dont);
422 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
423 int kvm_arch_prepare_memory_region(struct kvm *kvm,
424 struct kvm_memory_slot *memslot,
425 struct kvm_memory_slot old,
426 struct kvm_userspace_memory_region *mem,
428 void kvm_arch_commit_memory_region(struct kvm *kvm,
429 struct kvm_userspace_memory_region *mem,
430 struct kvm_memory_slot old,
432 bool kvm_largepages_enabled(void);
433 void kvm_disable_largepages(void);
434 void kvm_arch_flush_shadow(struct kvm *kvm);
436 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
439 struct page *get_bad_page(void);
440 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
441 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
442 void kvm_release_page_clean(struct page *page);
443 void kvm_release_page_dirty(struct page *page);
444 void kvm_set_page_dirty(struct page *page);
445 void kvm_set_page_accessed(struct page *page);
447 pfn_t hva_to_pfn_atomic(unsigned long addr);
448 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
449 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
450 bool write_fault, bool *writable);
451 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
452 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
454 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
455 void kvm_release_pfn_dirty(pfn_t);
456 void kvm_release_pfn_clean(pfn_t pfn);
457 void kvm_set_pfn_dirty(pfn_t pfn);
458 void kvm_set_pfn_accessed(pfn_t pfn);
459 void kvm_get_pfn(pfn_t pfn);
461 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
463 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
465 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
466 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
467 void *data, unsigned long len);
468 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
469 int offset, int len);
470 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
472 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
473 void *data, unsigned long len);
474 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
476 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
477 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
478 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
479 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
480 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
481 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
482 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
485 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
486 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
487 bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
488 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
489 void kvm_resched(struct kvm_vcpu *vcpu);
490 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
491 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
493 void kvm_flush_remote_tlbs(struct kvm *kvm);
494 void kvm_reload_remote_mmus(struct kvm *kvm);
496 long kvm_arch_dev_ioctl(struct file *filp,
497 unsigned int ioctl, unsigned long arg);
498 long kvm_arch_vcpu_ioctl(struct file *filp,
499 unsigned int ioctl, unsigned long arg);
500 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
502 int kvm_dev_ioctl_check_extension(long ext);
504 int kvm_get_dirty_log(struct kvm *kvm,
505 struct kvm_dirty_log *log, int *is_dirty);
506 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
507 struct kvm_dirty_log *log);
509 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
511 kvm_userspace_memory_region *mem,
513 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level);
514 long kvm_arch_vm_ioctl(struct file *filp,
515 unsigned int ioctl, unsigned long arg);
517 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
518 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
520 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
521 struct kvm_translation *tr);
523 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
524 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
525 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
526 struct kvm_sregs *sregs);
527 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
528 struct kvm_sregs *sregs);
529 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
530 struct kvm_mp_state *mp_state);
531 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
532 struct kvm_mp_state *mp_state);
533 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
534 struct kvm_guest_debug *dbg);
535 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
537 int kvm_arch_init(void *opaque);
538 void kvm_arch_exit(void);
540 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
541 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
543 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
544 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
545 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
546 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
547 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
548 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
550 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
551 int kvm_arch_hardware_enable(void *garbage);
552 void kvm_arch_hardware_disable(void *garbage);
553 int kvm_arch_hardware_setup(void);
554 void kvm_arch_hardware_unsetup(void);
555 void kvm_arch_check_processor_compat(void *rtn);
556 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
557 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
559 void kvm_free_physmem(struct kvm *kvm);
561 void *kvm_kvzalloc(unsigned long size);
562 void kvm_kvfree(const void *addr);
564 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
565 static inline struct kvm *kvm_arch_alloc_vm(void)
567 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
570 static inline void kvm_arch_free_vm(struct kvm *kvm)
576 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
578 #ifdef __KVM_HAVE_ARCH_WQP
579 return vcpu->arch.wqp;
585 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
586 void kvm_arch_destroy_vm(struct kvm *kvm);
587 void kvm_free_all_assigned_devices(struct kvm *kvm);
588 void kvm_arch_sync_events(struct kvm *kvm);
590 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
591 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
593 bool kvm_is_mmio_pfn(pfn_t pfn);
595 struct kvm_irq_ack_notifier {
596 struct hlist_node link;
598 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
601 struct kvm_assigned_dev_kernel {
602 struct kvm_irq_ack_notifier ack_notifier;
603 struct list_head list;
608 unsigned int entries_nr;
610 bool host_irq_disabled;
612 struct msix_entry *host_msix_entries;
614 struct msix_entry *guest_msix_entries;
615 unsigned long irq_requested_type;
620 spinlock_t intx_lock;
621 spinlock_t intx_mask_lock;
623 struct pci_saved_state *pci_saved_state;
626 struct kvm_irq_mask_notifier {
627 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
629 struct hlist_node link;
632 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
633 struct kvm_irq_mask_notifier *kimn);
634 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
635 struct kvm_irq_mask_notifier *kimn);
636 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
639 #ifdef __KVM_HAVE_IOAPIC
640 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
641 union kvm_ioapic_redirect_entry *entry,
642 unsigned long *deliver_bitmask);
644 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
645 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
646 int irq_source_id, int level);
647 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
648 void kvm_register_irq_ack_notifier(struct kvm *kvm,
649 struct kvm_irq_ack_notifier *kian);
650 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
651 struct kvm_irq_ack_notifier *kian);
652 int kvm_request_irq_source_id(struct kvm *kvm);
653 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
655 /* For vcpu->arch.iommu_flags */
656 #define KVM_IOMMU_CACHE_COHERENCY 0x1
658 #ifdef CONFIG_IOMMU_API
659 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
660 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
661 int kvm_iommu_map_guest(struct kvm *kvm);
662 int kvm_iommu_unmap_guest(struct kvm *kvm);
663 int kvm_assign_device(struct kvm *kvm,
664 struct kvm_assigned_dev_kernel *assigned_dev);
665 int kvm_deassign_device(struct kvm *kvm,
666 struct kvm_assigned_dev_kernel *assigned_dev);
667 #else /* CONFIG_IOMMU_API */
668 static inline int kvm_iommu_map_pages(struct kvm *kvm,
669 struct kvm_memory_slot *slot)
674 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
675 struct kvm_memory_slot *slot)
679 static inline int kvm_iommu_map_guest(struct kvm *kvm)
684 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
689 static inline int kvm_assign_device(struct kvm *kvm,
690 struct kvm_assigned_dev_kernel *assigned_dev)
695 static inline int kvm_deassign_device(struct kvm *kvm,
696 struct kvm_assigned_dev_kernel *assigned_dev)
700 #endif /* CONFIG_IOMMU_API */
702 static inline void kvm_guest_enter(void)
704 BUG_ON(preemptible());
705 account_system_vtime(current);
706 current->flags |= PF_VCPU;
707 /* KVM does not hold any references to rcu protected data when it
708 * switches CPU into a guest mode. In fact switching to a guest mode
709 * is very similar to exiting to userspase from rcu point of view. In
710 * addition CPU may stay in a guest mode for quite a long time (up to
711 * one time slice). Lets treat guest mode as quiescent state, just like
712 * we do with user-mode execution.
714 rcu_virt_note_context_switch(smp_processor_id());
717 static inline void kvm_guest_exit(void)
719 account_system_vtime(current);
720 current->flags &= ~PF_VCPU;
724 * search_memslots() and __gfn_to_memslot() are here because they are
725 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
726 * gfn_to_memslot() itself isn't here as an inline because that would
727 * bloat other code too much.
729 static inline struct kvm_memory_slot *
730 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
732 struct kvm_memory_slot *memslot;
734 kvm_for_each_memslot(memslot, slots)
735 if (gfn >= memslot->base_gfn &&
736 gfn < memslot->base_gfn + memslot->npages)
742 static inline struct kvm_memory_slot *
743 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
745 return search_memslots(slots, gfn);
748 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
750 return gfn_to_memslot(kvm, gfn)->id;
753 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
755 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
756 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
757 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
761 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
763 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
765 return slot->base_gfn + gfn_offset;
768 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
771 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
774 static inline gpa_t gfn_to_gpa(gfn_t gfn)
776 return (gpa_t)gfn << PAGE_SHIFT;
779 static inline gfn_t gpa_to_gfn(gpa_t gpa)
781 return (gfn_t)(gpa >> PAGE_SHIFT);
784 static inline hpa_t pfn_to_hpa(pfn_t pfn)
786 return (hpa_t)pfn << PAGE_SHIFT;
789 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
791 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
799 struct kvm_stats_debugfs_item {
802 enum kvm_stat_kind kind;
803 struct dentry *dentry;
805 extern struct kvm_stats_debugfs_item debugfs_entries[];
806 extern struct dentry *kvm_debugfs_dir;
808 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
809 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
811 if (unlikely(vcpu->kvm->mmu_notifier_count))
814 * Ensure the read of mmu_notifier_count happens before the read
815 * of mmu_notifier_seq. This interacts with the smp_wmb() in
816 * mmu_notifier_invalidate_range_end to make sure that the caller
817 * either sees the old (non-zero) value of mmu_notifier_count or
818 * the new (incremented) value of mmu_notifier_seq.
819 * PowerPC Book3s HV KVM calls this under a per-page lock
820 * rather than under kvm->mmu_lock, for scalability, so
821 * can't rely on kvm->mmu_lock to keep things ordered.
824 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
830 #ifdef KVM_CAP_IRQ_ROUTING
832 #define KVM_MAX_IRQ_ROUTES 1024
834 int kvm_setup_default_irq_routing(struct kvm *kvm);
835 int kvm_set_irq_routing(struct kvm *kvm,
836 const struct kvm_irq_routing_entry *entries,
839 void kvm_free_irq_routing(struct kvm *kvm);
841 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
845 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
849 #ifdef CONFIG_HAVE_KVM_EVENTFD
851 void kvm_eventfd_init(struct kvm *kvm);
852 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
853 void kvm_irqfd_release(struct kvm *kvm);
854 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
855 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
859 static inline void kvm_eventfd_init(struct kvm *kvm) {}
861 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
866 static inline void kvm_irqfd_release(struct kvm *kvm) {}
868 #ifdef CONFIG_HAVE_KVM_IRQCHIP
869 static inline void kvm_irq_routing_update(struct kvm *kvm,
870 struct kvm_irq_routing_table *irq_rt)
872 rcu_assign_pointer(kvm->irq_routing, irq_rt);
876 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
881 #endif /* CONFIG_HAVE_KVM_EVENTFD */
883 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
884 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
886 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
889 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
893 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
897 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
899 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
904 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
912 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
914 set_bit(req, &vcpu->requests);
917 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
919 if (test_bit(req, &vcpu->requests)) {
920 clear_bit(req, &vcpu->requests);
927 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
929 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
931 vcpu->spin_loop.in_spin_loop = val;
933 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
935 vcpu->spin_loop.dy_eligible = val;
938 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
940 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
944 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
948 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu)
953 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */