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 <linux/irqflags.h>
26 #include <linux/context_tracking.h>
27 #include <asm/signal.h>
29 #include <linux/kvm.h>
30 #include <linux/kvm_para.h>
32 #include <linux/kvm_types.h>
34 #include <asm/kvm_host.h>
37 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
38 * in kvm, other bits are visible for userspace which are defined in
39 * include/linux/kvm_h.
41 #define KVM_MEMSLOT_INVALID (1UL << 16)
42 #define KVM_MEMSLOT_INCOHERENT (1UL << 17)
44 /* Two fragments for cross MMIO pages. */
45 #define KVM_MAX_MMIO_FRAGMENTS 2
48 * For the normal pfn, the highest 12 bits should be zero,
49 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
50 * mask bit 63 to indicate the noslot pfn.
52 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
53 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
54 #define KVM_PFN_NOSLOT (0x1ULL << 63)
56 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
57 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
58 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
61 * error pfns indicate that the gfn is in slot but faild to
62 * translate it to pfn on host.
64 static inline bool is_error_pfn(pfn_t pfn)
66 return !!(pfn & KVM_PFN_ERR_MASK);
70 * error_noslot pfns indicate that the gfn can not be
71 * translated to pfn - it is not in slot or failed to
72 * translate it to pfn.
74 static inline bool is_error_noslot_pfn(pfn_t pfn)
76 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
79 /* noslot pfn indicates that the gfn is not in slot. */
80 static inline bool is_noslot_pfn(pfn_t pfn)
82 return pfn == KVM_PFN_NOSLOT;
86 * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390)
87 * provide own defines and kvm_is_error_hva
89 #ifndef KVM_HVA_ERR_BAD
91 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
92 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
94 static inline bool kvm_is_error_hva(unsigned long addr)
96 return addr >= PAGE_OFFSET;
101 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
103 static inline bool is_error_page(struct page *page)
109 * vcpu->requests bit members
111 #define KVM_REQ_TLB_FLUSH 0
112 #define KVM_REQ_MIGRATE_TIMER 1
113 #define KVM_REQ_REPORT_TPR_ACCESS 2
114 #define KVM_REQ_MMU_RELOAD 3
115 #define KVM_REQ_TRIPLE_FAULT 4
116 #define KVM_REQ_PENDING_TIMER 5
117 #define KVM_REQ_UNHALT 6
118 #define KVM_REQ_MMU_SYNC 7
119 #define KVM_REQ_CLOCK_UPDATE 8
120 #define KVM_REQ_KICK 9
121 #define KVM_REQ_DEACTIVATE_FPU 10
122 #define KVM_REQ_EVENT 11
123 #define KVM_REQ_APF_HALT 12
124 #define KVM_REQ_STEAL_UPDATE 13
125 #define KVM_REQ_NMI 14
126 #define KVM_REQ_PMU 15
127 #define KVM_REQ_PMI 16
128 #define KVM_REQ_WATCHDOG 17
129 #define KVM_REQ_MASTERCLOCK_UPDATE 18
130 #define KVM_REQ_MCLOCK_INPROGRESS 19
131 #define KVM_REQ_EPR_EXIT 20
132 #define KVM_REQ_SCAN_IOAPIC 21
133 #define KVM_REQ_GLOBAL_CLOCK_UPDATE 22
134 #define KVM_REQ_ENABLE_IBS 23
135 #define KVM_REQ_DISABLE_IBS 24
136 #define KVM_REQ_APIC_PAGE_RELOAD 25
138 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
139 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
141 extern struct kmem_cache *kvm_vcpu_cache;
143 extern spinlock_t kvm_lock;
144 extern struct list_head vm_list;
146 struct kvm_io_range {
149 struct kvm_io_device *dev;
152 #define NR_IOBUS_DEVS 1000
157 struct kvm_io_range range[];
163 KVM_VIRTIO_CCW_NOTIFY_BUS,
168 int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
169 int len, const void *val);
170 int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx,
171 gpa_t addr, int len, const void *val, long cookie);
172 int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
174 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
175 int len, struct kvm_io_device *dev);
176 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
177 struct kvm_io_device *dev);
179 #ifdef CONFIG_KVM_ASYNC_PF
180 struct kvm_async_pf {
181 struct work_struct work;
182 struct list_head link;
183 struct list_head queue;
184 struct kvm_vcpu *vcpu;
185 struct mm_struct *mm;
188 struct kvm_arch_async_pf arch;
192 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
193 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
194 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva,
195 struct kvm_arch_async_pf *arch);
196 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
203 READING_SHADOW_PAGE_TABLES,
207 * Sometimes a large or cross-page mmio needs to be broken up into separate
208 * exits for userspace servicing.
210 struct kvm_mmio_fragment {
218 #ifdef CONFIG_PREEMPT_NOTIFIERS
219 struct preempt_notifier preempt_notifier;
225 unsigned long requests;
226 unsigned long guest_debug;
232 int guest_fpu_loaded, guest_xcr0_loaded;
233 unsigned char fpu_counter;
234 wait_queue_head_t wq;
238 struct kvm_vcpu_stat stat;
240 #ifdef CONFIG_HAS_IOMEM
242 int mmio_read_completed;
244 int mmio_cur_fragment;
245 int mmio_nr_fragments;
246 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
249 #ifdef CONFIG_KVM_ASYNC_PF
252 struct list_head queue;
253 struct list_head done;
258 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
260 * Cpu relax intercept or pause loop exit optimization
261 * in_spin_loop: set when a vcpu does a pause loop exit
262 * or cpu relax intercepted.
263 * dy_eligible: indicates whether vcpu is eligible for directed yield.
271 struct kvm_vcpu_arch arch;
274 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
276 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
280 * Some of the bitops functions do not support too long bitmaps.
281 * This number must be determined not to exceed such limits.
283 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
285 struct kvm_memory_slot {
287 unsigned long npages;
288 unsigned long *dirty_bitmap;
289 struct kvm_arch_memory_slot arch;
290 unsigned long userspace_addr;
295 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
297 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
300 struct kvm_s390_adapter_int {
308 struct kvm_kernel_irq_routing_entry {
311 int (*set)(struct kvm_kernel_irq_routing_entry *e,
312 struct kvm *kvm, int irq_source_id, int level,
320 struct kvm_s390_adapter_int adapter;
322 struct hlist_node link;
325 #ifndef KVM_PRIVATE_MEM_SLOTS
326 #define KVM_PRIVATE_MEM_SLOTS 0
329 #ifndef KVM_MEM_SLOTS_NUM
330 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
335 * memslots are not sorted by id anymore, please use id_to_memslot()
336 * to get the memslot by its id.
338 struct kvm_memslots {
340 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
341 /* The mapping table from slot id to the index in memslots[]. */
342 short id_to_index[KVM_MEM_SLOTS_NUM];
349 struct mutex slots_lock;
350 struct mm_struct *mm; /* userspace tied to this vm */
351 struct kvm_memslots *memslots;
352 struct srcu_struct srcu;
353 struct srcu_struct irq_srcu;
354 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
357 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
358 atomic_t online_vcpus;
359 int last_boosted_vcpu;
360 struct list_head vm_list;
362 struct kvm_io_bus *buses[KVM_NR_BUSES];
363 #ifdef CONFIG_HAVE_KVM_EVENTFD
366 struct list_head items;
367 struct list_head resampler_list;
368 struct mutex resampler_lock;
370 struct list_head ioeventfds;
372 struct kvm_vm_stat stat;
373 struct kvm_arch arch;
374 atomic_t users_count;
375 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
376 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
377 spinlock_t ring_lock;
378 struct list_head coalesced_zones;
381 struct mutex irq_lock;
382 #ifdef CONFIG_HAVE_KVM_IRQCHIP
384 * Update side is protected by irq_lock.
386 struct kvm_irq_routing_table __rcu *irq_routing;
388 #ifdef CONFIG_HAVE_KVM_IRQFD
389 struct hlist_head irq_ack_notifier_list;
392 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
393 struct mmu_notifier mmu_notifier;
394 unsigned long mmu_notifier_seq;
395 long mmu_notifier_count;
398 struct list_head devices;
401 #define kvm_err(fmt, ...) \
402 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
403 #define kvm_info(fmt, ...) \
404 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
405 #define kvm_debug(fmt, ...) \
406 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
407 #define kvm_pr_unimpl(fmt, ...) \
408 pr_err_ratelimited("kvm [%i]: " fmt, \
409 task_tgid_nr(current), ## __VA_ARGS__)
411 /* The guest did something we don't support. */
412 #define vcpu_unimpl(vcpu, fmt, ...) \
413 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
415 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
418 return kvm->vcpus[i];
421 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
423 idx < atomic_read(&kvm->online_vcpus) && \
424 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
427 #define kvm_for_each_memslot(memslot, slots) \
428 for (memslot = &slots->memslots[0]; \
429 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
432 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
433 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
435 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
436 void vcpu_put(struct kvm_vcpu *vcpu);
438 #ifdef __KVM_HAVE_IOAPIC
439 void kvm_vcpu_request_scan_ioapic(struct kvm *kvm);
441 static inline void kvm_vcpu_request_scan_ioapic(struct kvm *kvm)
446 #ifdef CONFIG_HAVE_KVM_IRQFD
447 int kvm_irqfd_init(void);
448 void kvm_irqfd_exit(void);
450 static inline int kvm_irqfd_init(void)
455 static inline void kvm_irqfd_exit(void)
459 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
460 struct module *module);
463 void kvm_get_kvm(struct kvm *kvm);
464 void kvm_put_kvm(struct kvm *kvm);
466 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
468 return rcu_dereference_check(kvm->memslots,
469 srcu_read_lock_held(&kvm->srcu)
470 || lockdep_is_held(&kvm->slots_lock));
473 static inline struct kvm_memory_slot *
474 id_to_memslot(struct kvm_memslots *slots, int id)
476 int index = slots->id_to_index[id];
477 struct kvm_memory_slot *slot;
479 slot = &slots->memslots[index];
481 WARN_ON(slot->id != id);
486 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
487 * - create a new memory slot
488 * - delete an existing memory slot
489 * - modify an existing memory slot
490 * -- move it in the guest physical memory space
491 * -- just change its flags
493 * Since flags can be changed by some of these operations, the following
494 * differentiation is the best we can do for __kvm_set_memory_region():
503 int kvm_set_memory_region(struct kvm *kvm,
504 const struct kvm_userspace_memory_region *mem);
505 int __kvm_set_memory_region(struct kvm *kvm,
506 const struct kvm_userspace_memory_region *mem);
507 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
508 struct kvm_memory_slot *dont);
509 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
510 unsigned long npages);
511 void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots);
512 int kvm_arch_prepare_memory_region(struct kvm *kvm,
513 struct kvm_memory_slot *memslot,
514 const struct kvm_userspace_memory_region *mem,
515 enum kvm_mr_change change);
516 void kvm_arch_commit_memory_region(struct kvm *kvm,
517 const struct kvm_userspace_memory_region *mem,
518 const struct kvm_memory_slot *old,
519 const struct kvm_memory_slot *new,
520 enum kvm_mr_change change);
521 bool kvm_largepages_enabled(void);
522 void kvm_disable_largepages(void);
523 /* flush all memory translations */
524 void kvm_arch_flush_shadow_all(struct kvm *kvm);
525 /* flush memory translations pointing to 'slot' */
526 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
527 struct kvm_memory_slot *slot);
529 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
532 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
533 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
534 unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable);
535 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
536 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn,
538 void kvm_release_page_clean(struct page *page);
539 void kvm_release_page_dirty(struct page *page);
540 void kvm_set_page_accessed(struct page *page);
542 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
543 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
544 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
546 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
547 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
548 pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn, bool atomic,
549 bool *async, bool write_fault, bool *writable);
551 void kvm_release_pfn_clean(pfn_t pfn);
552 void kvm_set_pfn_dirty(pfn_t pfn);
553 void kvm_set_pfn_accessed(pfn_t pfn);
554 void kvm_get_pfn(pfn_t pfn);
556 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
558 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
560 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
561 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
562 void *data, unsigned long len);
563 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
564 int offset, int len);
565 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
567 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
568 void *data, unsigned long len);
569 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
570 gpa_t gpa, unsigned long len);
571 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
572 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
573 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
574 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
575 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
576 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
578 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
579 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
580 int kvm_vcpu_yield_to(struct kvm_vcpu *target);
581 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
582 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
583 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
585 void kvm_flush_remote_tlbs(struct kvm *kvm);
586 void kvm_reload_remote_mmus(struct kvm *kvm);
587 void kvm_make_mclock_inprogress_request(struct kvm *kvm);
588 void kvm_make_scan_ioapic_request(struct kvm *kvm);
589 bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);
591 long kvm_arch_dev_ioctl(struct file *filp,
592 unsigned int ioctl, unsigned long arg);
593 long kvm_arch_vcpu_ioctl(struct file *filp,
594 unsigned int ioctl, unsigned long arg);
595 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
597 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext);
599 int kvm_get_dirty_log(struct kvm *kvm,
600 struct kvm_dirty_log *log, int *is_dirty);
602 int kvm_get_dirty_log_protect(struct kvm *kvm,
603 struct kvm_dirty_log *log, bool *is_dirty);
605 void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
606 struct kvm_memory_slot *slot,
610 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
611 struct kvm_dirty_log *log);
613 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
615 long kvm_arch_vm_ioctl(struct file *filp,
616 unsigned int ioctl, unsigned long arg);
618 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
619 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
621 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
622 struct kvm_translation *tr);
624 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
625 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
626 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
627 struct kvm_sregs *sregs);
628 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
629 struct kvm_sregs *sregs);
630 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
631 struct kvm_mp_state *mp_state);
632 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
633 struct kvm_mp_state *mp_state);
634 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
635 struct kvm_guest_debug *dbg);
636 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
638 int kvm_arch_init(void *opaque);
639 void kvm_arch_exit(void);
641 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
642 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
644 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);
646 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
647 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
648 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
649 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
650 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
651 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
652 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
654 int kvm_arch_hardware_enable(void);
655 void kvm_arch_hardware_disable(void);
656 int kvm_arch_hardware_setup(void);
657 void kvm_arch_hardware_unsetup(void);
658 void kvm_arch_check_processor_compat(void *rtn);
659 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
660 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
662 void *kvm_kvzalloc(unsigned long size);
664 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
665 static inline struct kvm *kvm_arch_alloc_vm(void)
667 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
670 static inline void kvm_arch_free_vm(struct kvm *kvm)
676 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
677 void kvm_arch_register_noncoherent_dma(struct kvm *kvm);
678 void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm);
679 bool kvm_arch_has_noncoherent_dma(struct kvm *kvm);
681 static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm)
685 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm)
689 static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
695 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
697 #ifdef __KVM_HAVE_ARCH_WQP
698 return vcpu->arch.wqp;
704 #ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
706 * returns true if the virtual interrupt controller is initialized and
707 * ready to accept virtual IRQ. On some architectures the virtual interrupt
708 * controller is dynamically instantiated and this is not always true.
710 bool kvm_arch_intc_initialized(struct kvm *kvm);
712 static inline bool kvm_arch_intc_initialized(struct kvm *kvm)
718 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
719 void kvm_arch_destroy_vm(struct kvm *kvm);
720 void kvm_arch_sync_events(struct kvm *kvm);
722 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
723 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
725 bool kvm_is_reserved_pfn(pfn_t pfn);
727 struct kvm_irq_ack_notifier {
728 struct hlist_node link;
730 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
733 int kvm_irq_map_gsi(struct kvm *kvm,
734 struct kvm_kernel_irq_routing_entry *entries, int gsi);
735 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin);
737 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
739 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);
740 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
741 int irq_source_id, int level, bool line_status);
742 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
743 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
744 void kvm_register_irq_ack_notifier(struct kvm *kvm,
745 struct kvm_irq_ack_notifier *kian);
746 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
747 struct kvm_irq_ack_notifier *kian);
748 int kvm_request_irq_source_id(struct kvm *kvm);
749 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
751 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
752 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
753 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
755 static inline int kvm_iommu_map_pages(struct kvm *kvm,
756 struct kvm_memory_slot *slot)
761 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
762 struct kvm_memory_slot *slot)
767 /* must be called with irqs disabled */
768 static inline void __kvm_guest_enter(void)
771 /* KVM does not hold any references to rcu protected data when it
772 * switches CPU into a guest mode. In fact switching to a guest mode
773 * is very similar to exiting to userspace from rcu point of view. In
774 * addition CPU may stay in a guest mode for quite a long time (up to
775 * one time slice). Lets treat guest mode as quiescent state, just like
776 * we do with user-mode execution.
778 if (!context_tracking_cpu_is_enabled())
779 rcu_virt_note_context_switch(smp_processor_id());
782 /* must be called with irqs disabled */
783 static inline void __kvm_guest_exit(void)
788 static inline void kvm_guest_enter(void)
792 local_irq_save(flags);
794 local_irq_restore(flags);
797 static inline void kvm_guest_exit(void)
801 local_irq_save(flags);
803 local_irq_restore(flags);
807 * search_memslots() and __gfn_to_memslot() are here because they are
808 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
809 * gfn_to_memslot() itself isn't here as an inline because that would
810 * bloat other code too much.
812 static inline struct kvm_memory_slot *
813 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
815 int start = 0, end = slots->used_slots;
816 int slot = atomic_read(&slots->lru_slot);
817 struct kvm_memory_slot *memslots = slots->memslots;
819 if (gfn >= memslots[slot].base_gfn &&
820 gfn < memslots[slot].base_gfn + memslots[slot].npages)
821 return &memslots[slot];
823 while (start < end) {
824 slot = start + (end - start) / 2;
826 if (gfn >= memslots[slot].base_gfn)
832 if (gfn >= memslots[start].base_gfn &&
833 gfn < memslots[start].base_gfn + memslots[start].npages) {
834 atomic_set(&slots->lru_slot, start);
835 return &memslots[start];
841 static inline struct kvm_memory_slot *
842 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
844 return search_memslots(slots, gfn);
847 static inline unsigned long
848 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
850 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
853 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
855 return gfn_to_memslot(kvm, gfn)->id;
859 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
861 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
863 return slot->base_gfn + gfn_offset;
866 static inline gpa_t gfn_to_gpa(gfn_t gfn)
868 return (gpa_t)gfn << PAGE_SHIFT;
871 static inline gfn_t gpa_to_gfn(gpa_t gpa)
873 return (gfn_t)(gpa >> PAGE_SHIFT);
876 static inline hpa_t pfn_to_hpa(pfn_t pfn)
878 return (hpa_t)pfn << PAGE_SHIFT;
881 static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa)
883 unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
885 return kvm_is_error_hva(hva);
888 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
890 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
898 struct kvm_stats_debugfs_item {
901 enum kvm_stat_kind kind;
902 struct dentry *dentry;
904 extern struct kvm_stats_debugfs_item debugfs_entries[];
905 extern struct dentry *kvm_debugfs_dir;
907 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
908 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
910 if (unlikely(kvm->mmu_notifier_count))
913 * Ensure the read of mmu_notifier_count happens before the read
914 * of mmu_notifier_seq. This interacts with the smp_wmb() in
915 * mmu_notifier_invalidate_range_end to make sure that the caller
916 * either sees the old (non-zero) value of mmu_notifier_count or
917 * the new (incremented) value of mmu_notifier_seq.
918 * PowerPC Book3s HV KVM calls this under a per-page lock
919 * rather than under kvm->mmu_lock, for scalability, so
920 * can't rely on kvm->mmu_lock to keep things ordered.
923 if (kvm->mmu_notifier_seq != mmu_seq)
929 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
932 #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that...
934 #define KVM_MAX_IRQ_ROUTES 1024
937 int kvm_setup_default_irq_routing(struct kvm *kvm);
938 int kvm_set_irq_routing(struct kvm *kvm,
939 const struct kvm_irq_routing_entry *entries,
942 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
943 const struct kvm_irq_routing_entry *ue);
944 void kvm_free_irq_routing(struct kvm *kvm);
948 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
952 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
954 #ifdef CONFIG_HAVE_KVM_EVENTFD
956 void kvm_eventfd_init(struct kvm *kvm);
957 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
959 #ifdef CONFIG_HAVE_KVM_IRQFD
960 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
961 void kvm_irqfd_release(struct kvm *kvm);
962 void kvm_irq_routing_update(struct kvm *);
964 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
969 static inline void kvm_irqfd_release(struct kvm *kvm) {}
974 static inline void kvm_eventfd_init(struct kvm *kvm) {}
976 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
981 static inline void kvm_irqfd_release(struct kvm *kvm) {}
983 #ifdef CONFIG_HAVE_KVM_IRQCHIP
984 static inline void kvm_irq_routing_update(struct kvm *kvm)
989 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
994 #endif /* CONFIG_HAVE_KVM_EVENTFD */
996 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
997 static inline bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu)
999 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
1002 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
1004 return (vcpu->arch.apic_base & MSR_IA32_APICBASE_BSP) != 0;
1007 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
1011 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
1015 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1017 set_bit(req, &vcpu->requests);
1020 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1022 if (test_bit(req, &vcpu->requests)) {
1023 clear_bit(req, &vcpu->requests);
1030 extern bool kvm_rebooting;
1033 struct kvm_device_ops *ops;
1036 struct list_head vm_node;
1039 /* create, destroy, and name are mandatory */
1040 struct kvm_device_ops {
1042 int (*create)(struct kvm_device *dev, u32 type);
1045 * Destroy is responsible for freeing dev.
1047 * Destroy may be called before or after destructors are called
1048 * on emulated I/O regions, depending on whether a reference is
1049 * held by a vcpu or other kvm component that gets destroyed
1050 * after the emulated I/O.
1052 void (*destroy)(struct kvm_device *dev);
1054 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1055 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1056 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1057 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1061 void kvm_device_get(struct kvm_device *dev);
1062 void kvm_device_put(struct kvm_device *dev);
1063 struct kvm_device *kvm_device_from_filp(struct file *filp);
1064 int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type);
1065 void kvm_unregister_device_ops(u32 type);
1067 extern struct kvm_device_ops kvm_mpic_ops;
1068 extern struct kvm_device_ops kvm_xics_ops;
1069 extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
1070 extern struct kvm_device_ops kvm_arm_vgic_v3_ops;
1072 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1074 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1076 vcpu->spin_loop.in_spin_loop = val;
1078 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1080 vcpu->spin_loop.dy_eligible = val;
1083 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1085 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1089 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1092 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */