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
47 #ifndef KVM_ADDRESS_SPACE_NUM
48 #define KVM_ADDRESS_SPACE_NUM 1
52 * For the normal pfn, the highest 12 bits should be zero,
53 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
54 * mask bit 63 to indicate the noslot pfn.
56 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
57 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
58 #define KVM_PFN_NOSLOT (0x1ULL << 63)
60 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
61 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
62 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
65 * error pfns indicate that the gfn is in slot but faild to
66 * translate it to pfn on host.
68 static inline bool is_error_pfn(pfn_t pfn)
70 return !!(pfn & KVM_PFN_ERR_MASK);
74 * error_noslot pfns indicate that the gfn can not be
75 * translated to pfn - it is not in slot or failed to
76 * translate it to pfn.
78 static inline bool is_error_noslot_pfn(pfn_t pfn)
80 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
83 /* noslot pfn indicates that the gfn is not in slot. */
84 static inline bool is_noslot_pfn(pfn_t pfn)
86 return pfn == KVM_PFN_NOSLOT;
90 * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390)
91 * provide own defines and kvm_is_error_hva
93 #ifndef KVM_HVA_ERR_BAD
95 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
96 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
98 static inline bool kvm_is_error_hva(unsigned long addr)
100 return addr >= PAGE_OFFSET;
105 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
107 static inline bool is_error_page(struct page *page)
113 * vcpu->requests bit members
115 #define KVM_REQ_TLB_FLUSH 0
116 #define KVM_REQ_MIGRATE_TIMER 1
117 #define KVM_REQ_REPORT_TPR_ACCESS 2
118 #define KVM_REQ_MMU_RELOAD 3
119 #define KVM_REQ_TRIPLE_FAULT 4
120 #define KVM_REQ_PENDING_TIMER 5
121 #define KVM_REQ_UNHALT 6
122 #define KVM_REQ_MMU_SYNC 7
123 #define KVM_REQ_CLOCK_UPDATE 8
124 #define KVM_REQ_KICK 9
125 #define KVM_REQ_DEACTIVATE_FPU 10
126 #define KVM_REQ_EVENT 11
127 #define KVM_REQ_APF_HALT 12
128 #define KVM_REQ_STEAL_UPDATE 13
129 #define KVM_REQ_NMI 14
130 #define KVM_REQ_PMU 15
131 #define KVM_REQ_PMI 16
132 #define KVM_REQ_WATCHDOG 17
133 #define KVM_REQ_MASTERCLOCK_UPDATE 18
134 #define KVM_REQ_MCLOCK_INPROGRESS 19
135 #define KVM_REQ_EPR_EXIT 20
136 #define KVM_REQ_SCAN_IOAPIC 21
137 #define KVM_REQ_GLOBAL_CLOCK_UPDATE 22
138 #define KVM_REQ_ENABLE_IBS 23
139 #define KVM_REQ_DISABLE_IBS 24
140 #define KVM_REQ_APIC_PAGE_RELOAD 25
141 #define KVM_REQ_SMI 26
143 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
144 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
146 extern struct kmem_cache *kvm_vcpu_cache;
148 extern spinlock_t kvm_lock;
149 extern struct list_head vm_list;
151 struct kvm_io_range {
154 struct kvm_io_device *dev;
157 #define NR_IOBUS_DEVS 1000
162 struct kvm_io_range range[];
168 KVM_VIRTIO_CCW_NOTIFY_BUS,
173 int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
174 int len, const void *val);
175 int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx,
176 gpa_t addr, int len, const void *val, long cookie);
177 int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
179 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
180 int len, struct kvm_io_device *dev);
181 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
182 struct kvm_io_device *dev);
184 #ifdef CONFIG_KVM_ASYNC_PF
185 struct kvm_async_pf {
186 struct work_struct work;
187 struct list_head link;
188 struct list_head queue;
189 struct kvm_vcpu *vcpu;
190 struct mm_struct *mm;
193 struct kvm_arch_async_pf arch;
197 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
198 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
199 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva,
200 struct kvm_arch_async_pf *arch);
201 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
208 READING_SHADOW_PAGE_TABLES,
212 * Sometimes a large or cross-page mmio needs to be broken up into separate
213 * exits for userspace servicing.
215 struct kvm_mmio_fragment {
223 #ifdef CONFIG_PREEMPT_NOTIFIERS
224 struct preempt_notifier preempt_notifier;
230 unsigned long requests;
231 unsigned long guest_debug;
237 int guest_fpu_loaded, guest_xcr0_loaded;
238 unsigned char fpu_counter;
239 wait_queue_head_t wq;
243 struct kvm_vcpu_stat stat;
245 #ifdef CONFIG_HAS_IOMEM
247 int mmio_read_completed;
249 int mmio_cur_fragment;
250 int mmio_nr_fragments;
251 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
254 #ifdef CONFIG_KVM_ASYNC_PF
257 struct list_head queue;
258 struct list_head done;
263 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
265 * Cpu relax intercept or pause loop exit optimization
266 * in_spin_loop: set when a vcpu does a pause loop exit
267 * or cpu relax intercepted.
268 * dy_eligible: indicates whether vcpu is eligible for directed yield.
276 struct kvm_vcpu_arch arch;
279 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
281 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
285 * Some of the bitops functions do not support too long bitmaps.
286 * This number must be determined not to exceed such limits.
288 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
290 struct kvm_memory_slot {
292 unsigned long npages;
293 unsigned long *dirty_bitmap;
294 struct kvm_arch_memory_slot arch;
295 unsigned long userspace_addr;
300 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
302 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
305 struct kvm_s390_adapter_int {
313 struct kvm_kernel_irq_routing_entry {
316 int (*set)(struct kvm_kernel_irq_routing_entry *e,
317 struct kvm *kvm, int irq_source_id, int level,
325 struct kvm_s390_adapter_int adapter;
327 struct hlist_node link;
330 #ifndef KVM_PRIVATE_MEM_SLOTS
331 #define KVM_PRIVATE_MEM_SLOTS 0
334 #ifndef KVM_MEM_SLOTS_NUM
335 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
338 #ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
339 static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
347 * memslots are not sorted by id anymore, please use id_to_memslot()
348 * to get the memslot by its id.
350 struct kvm_memslots {
352 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
353 /* The mapping table from slot id to the index in memslots[]. */
354 short id_to_index[KVM_MEM_SLOTS_NUM];
361 struct mutex slots_lock;
362 struct mm_struct *mm; /* userspace tied to this vm */
363 struct kvm_memslots *memslots[KVM_ADDRESS_SPACE_NUM];
364 struct srcu_struct srcu;
365 struct srcu_struct irq_srcu;
366 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
369 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
370 atomic_t online_vcpus;
371 int last_boosted_vcpu;
372 struct list_head vm_list;
374 struct kvm_io_bus *buses[KVM_NR_BUSES];
375 #ifdef CONFIG_HAVE_KVM_EVENTFD
378 struct list_head items;
379 struct list_head resampler_list;
380 struct mutex resampler_lock;
382 struct list_head ioeventfds;
384 struct kvm_vm_stat stat;
385 struct kvm_arch arch;
386 atomic_t users_count;
387 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
388 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
389 spinlock_t ring_lock;
390 struct list_head coalesced_zones;
393 struct mutex irq_lock;
394 #ifdef CONFIG_HAVE_KVM_IRQCHIP
396 * Update side is protected by irq_lock.
398 struct kvm_irq_routing_table __rcu *irq_routing;
400 #ifdef CONFIG_HAVE_KVM_IRQFD
401 struct hlist_head irq_ack_notifier_list;
404 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
405 struct mmu_notifier mmu_notifier;
406 unsigned long mmu_notifier_seq;
407 long mmu_notifier_count;
410 struct list_head devices;
413 #define kvm_err(fmt, ...) \
414 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
415 #define kvm_info(fmt, ...) \
416 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
417 #define kvm_debug(fmt, ...) \
418 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
419 #define kvm_pr_unimpl(fmt, ...) \
420 pr_err_ratelimited("kvm [%i]: " fmt, \
421 task_tgid_nr(current), ## __VA_ARGS__)
423 /* The guest did something we don't support. */
424 #define vcpu_unimpl(vcpu, fmt, ...) \
425 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
427 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
430 return kvm->vcpus[i];
433 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
435 idx < atomic_read(&kvm->online_vcpus) && \
436 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
439 #define kvm_for_each_memslot(memslot, slots) \
440 for (memslot = &slots->memslots[0]; \
441 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
444 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
445 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
447 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
448 void vcpu_put(struct kvm_vcpu *vcpu);
450 #ifdef __KVM_HAVE_IOAPIC
451 void kvm_vcpu_request_scan_ioapic(struct kvm *kvm);
453 static inline void kvm_vcpu_request_scan_ioapic(struct kvm *kvm)
458 #ifdef CONFIG_HAVE_KVM_IRQFD
459 int kvm_irqfd_init(void);
460 void kvm_irqfd_exit(void);
462 static inline int kvm_irqfd_init(void)
467 static inline void kvm_irqfd_exit(void)
471 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
472 struct module *module);
475 void kvm_get_kvm(struct kvm *kvm);
476 void kvm_put_kvm(struct kvm *kvm);
478 static inline struct kvm_memslots *__kvm_memslots(struct kvm *kvm, int as_id)
480 return rcu_dereference_check(kvm->memslots[as_id],
481 srcu_read_lock_held(&kvm->srcu)
482 || lockdep_is_held(&kvm->slots_lock));
485 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
487 return __kvm_memslots(kvm, 0);
490 static inline struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu)
492 int as_id = kvm_arch_vcpu_memslots_id(vcpu);
494 return __kvm_memslots(vcpu->kvm, as_id);
497 static inline struct kvm_memory_slot *
498 id_to_memslot(struct kvm_memslots *slots, int id)
500 int index = slots->id_to_index[id];
501 struct kvm_memory_slot *slot;
503 slot = &slots->memslots[index];
505 WARN_ON(slot->id != id);
510 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
511 * - create a new memory slot
512 * - delete an existing memory slot
513 * - modify an existing memory slot
514 * -- move it in the guest physical memory space
515 * -- just change its flags
517 * Since flags can be changed by some of these operations, the following
518 * differentiation is the best we can do for __kvm_set_memory_region():
527 int kvm_set_memory_region(struct kvm *kvm,
528 const struct kvm_userspace_memory_region *mem);
529 int __kvm_set_memory_region(struct kvm *kvm,
530 const struct kvm_userspace_memory_region *mem);
531 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
532 struct kvm_memory_slot *dont);
533 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
534 unsigned long npages);
535 void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots);
536 int kvm_arch_prepare_memory_region(struct kvm *kvm,
537 struct kvm_memory_slot *memslot,
538 const struct kvm_userspace_memory_region *mem,
539 enum kvm_mr_change change);
540 void kvm_arch_commit_memory_region(struct kvm *kvm,
541 const struct kvm_userspace_memory_region *mem,
542 const struct kvm_memory_slot *old,
543 const struct kvm_memory_slot *new,
544 enum kvm_mr_change change);
545 bool kvm_largepages_enabled(void);
546 void kvm_disable_largepages(void);
547 /* flush all memory translations */
548 void kvm_arch_flush_shadow_all(struct kvm *kvm);
549 /* flush memory translations pointing to 'slot' */
550 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
551 struct kvm_memory_slot *slot);
553 int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn,
554 struct page **pages, int nr_pages);
556 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
557 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
558 unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable);
559 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
560 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn,
562 void kvm_release_page_clean(struct page *page);
563 void kvm_release_page_dirty(struct page *page);
564 void kvm_set_page_accessed(struct page *page);
566 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
567 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
568 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
570 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
571 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
572 pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn, bool atomic,
573 bool *async, bool write_fault, bool *writable);
575 void kvm_release_pfn_clean(pfn_t pfn);
576 void kvm_set_pfn_dirty(pfn_t pfn);
577 void kvm_set_pfn_accessed(pfn_t pfn);
578 void kvm_get_pfn(pfn_t pfn);
580 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
582 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
584 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
585 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
586 void *data, unsigned long len);
587 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
588 int offset, int len);
589 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
591 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
592 void *data, unsigned long len);
593 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
594 gpa_t gpa, unsigned long len);
595 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
596 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
597 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
598 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
599 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
600 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
602 struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu);
603 struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn);
604 pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn);
605 pfn_t kvm_vcpu_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
606 struct page *kvm_vcpu_gfn_to_page(struct kvm_vcpu *vcpu, gfn_t gfn);
607 unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn);
608 unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu *vcpu, gfn_t gfn, bool *writable);
609 int kvm_vcpu_read_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, void *data, int offset,
611 int kvm_vcpu_read_guest_atomic(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
613 int kvm_vcpu_read_guest(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
615 int kvm_vcpu_write_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, const void *data,
616 int offset, int len);
617 int kvm_vcpu_write_guest(struct kvm_vcpu *vcpu, gpa_t gpa, const void *data,
619 void kvm_vcpu_mark_page_dirty(struct kvm_vcpu *vcpu, gfn_t gfn);
621 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
622 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
623 int kvm_vcpu_yield_to(struct kvm_vcpu *target);
624 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
625 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
626 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
628 void kvm_flush_remote_tlbs(struct kvm *kvm);
629 void kvm_reload_remote_mmus(struct kvm *kvm);
630 void kvm_make_mclock_inprogress_request(struct kvm *kvm);
631 void kvm_make_scan_ioapic_request(struct kvm *kvm);
632 bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);
634 long kvm_arch_dev_ioctl(struct file *filp,
635 unsigned int ioctl, unsigned long arg);
636 long kvm_arch_vcpu_ioctl(struct file *filp,
637 unsigned int ioctl, unsigned long arg);
638 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
640 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext);
642 int kvm_get_dirty_log(struct kvm *kvm,
643 struct kvm_dirty_log *log, int *is_dirty);
645 int kvm_get_dirty_log_protect(struct kvm *kvm,
646 struct kvm_dirty_log *log, bool *is_dirty);
648 void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
649 struct kvm_memory_slot *slot,
653 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
654 struct kvm_dirty_log *log);
656 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
658 long kvm_arch_vm_ioctl(struct file *filp,
659 unsigned int ioctl, unsigned long arg);
661 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
662 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
664 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
665 struct kvm_translation *tr);
667 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
668 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
669 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
670 struct kvm_sregs *sregs);
671 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
672 struct kvm_sregs *sregs);
673 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
674 struct kvm_mp_state *mp_state);
675 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
676 struct kvm_mp_state *mp_state);
677 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
678 struct kvm_guest_debug *dbg);
679 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
681 int kvm_arch_init(void *opaque);
682 void kvm_arch_exit(void);
684 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
685 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
687 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);
689 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
690 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
691 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
692 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
693 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
694 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
695 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
697 int kvm_arch_hardware_enable(void);
698 void kvm_arch_hardware_disable(void);
699 int kvm_arch_hardware_setup(void);
700 void kvm_arch_hardware_unsetup(void);
701 void kvm_arch_check_processor_compat(void *rtn);
702 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
703 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
705 void *kvm_kvzalloc(unsigned long size);
707 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
708 static inline struct kvm *kvm_arch_alloc_vm(void)
710 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
713 static inline void kvm_arch_free_vm(struct kvm *kvm)
719 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
720 void kvm_arch_register_noncoherent_dma(struct kvm *kvm);
721 void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm);
722 bool kvm_arch_has_noncoherent_dma(struct kvm *kvm);
724 static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm)
728 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm)
732 static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
738 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
740 #ifdef __KVM_HAVE_ARCH_WQP
741 return vcpu->arch.wqp;
747 #ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
749 * returns true if the virtual interrupt controller is initialized and
750 * ready to accept virtual IRQ. On some architectures the virtual interrupt
751 * controller is dynamically instantiated and this is not always true.
753 bool kvm_arch_intc_initialized(struct kvm *kvm);
755 static inline bool kvm_arch_intc_initialized(struct kvm *kvm)
761 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
762 void kvm_arch_destroy_vm(struct kvm *kvm);
763 void kvm_arch_sync_events(struct kvm *kvm);
765 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
766 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
768 bool kvm_is_reserved_pfn(pfn_t pfn);
770 struct kvm_irq_ack_notifier {
771 struct hlist_node link;
773 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
776 int kvm_irq_map_gsi(struct kvm *kvm,
777 struct kvm_kernel_irq_routing_entry *entries, int gsi);
778 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin);
780 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
782 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);
783 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
784 int irq_source_id, int level, bool line_status);
785 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
786 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
787 void kvm_register_irq_ack_notifier(struct kvm *kvm,
788 struct kvm_irq_ack_notifier *kian);
789 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
790 struct kvm_irq_ack_notifier *kian);
791 int kvm_request_irq_source_id(struct kvm *kvm);
792 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
794 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
795 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
796 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
798 static inline int kvm_iommu_map_pages(struct kvm *kvm,
799 struct kvm_memory_slot *slot)
804 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
805 struct kvm_memory_slot *slot)
810 /* must be called with irqs disabled */
811 static inline void __kvm_guest_enter(void)
814 /* KVM does not hold any references to rcu protected data when it
815 * switches CPU into a guest mode. In fact switching to a guest mode
816 * is very similar to exiting to userspace from rcu point of view. In
817 * addition CPU may stay in a guest mode for quite a long time (up to
818 * one time slice). Lets treat guest mode as quiescent state, just like
819 * we do with user-mode execution.
821 if (!context_tracking_cpu_is_enabled())
822 rcu_virt_note_context_switch(smp_processor_id());
825 /* must be called with irqs disabled */
826 static inline void __kvm_guest_exit(void)
831 static inline void kvm_guest_enter(void)
835 local_irq_save(flags);
837 local_irq_restore(flags);
840 static inline void kvm_guest_exit(void)
844 local_irq_save(flags);
846 local_irq_restore(flags);
850 * search_memslots() and __gfn_to_memslot() are here because they are
851 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
852 * gfn_to_memslot() itself isn't here as an inline because that would
853 * bloat other code too much.
855 static inline struct kvm_memory_slot *
856 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
858 int start = 0, end = slots->used_slots;
859 int slot = atomic_read(&slots->lru_slot);
860 struct kvm_memory_slot *memslots = slots->memslots;
862 if (gfn >= memslots[slot].base_gfn &&
863 gfn < memslots[slot].base_gfn + memslots[slot].npages)
864 return &memslots[slot];
866 while (start < end) {
867 slot = start + (end - start) / 2;
869 if (gfn >= memslots[slot].base_gfn)
875 if (gfn >= memslots[start].base_gfn &&
876 gfn < memslots[start].base_gfn + memslots[start].npages) {
877 atomic_set(&slots->lru_slot, start);
878 return &memslots[start];
884 static inline struct kvm_memory_slot *
885 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
887 return search_memslots(slots, gfn);
890 static inline unsigned long
891 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
893 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
896 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
898 return gfn_to_memslot(kvm, gfn)->id;
902 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
904 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
906 return slot->base_gfn + gfn_offset;
909 static inline gpa_t gfn_to_gpa(gfn_t gfn)
911 return (gpa_t)gfn << PAGE_SHIFT;
914 static inline gfn_t gpa_to_gfn(gpa_t gpa)
916 return (gfn_t)(gpa >> PAGE_SHIFT);
919 static inline hpa_t pfn_to_hpa(pfn_t pfn)
921 return (hpa_t)pfn << PAGE_SHIFT;
924 static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa)
926 unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
928 return kvm_is_error_hva(hva);
931 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
933 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
941 struct kvm_stats_debugfs_item {
944 enum kvm_stat_kind kind;
945 struct dentry *dentry;
947 extern struct kvm_stats_debugfs_item debugfs_entries[];
948 extern struct dentry *kvm_debugfs_dir;
950 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
951 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
953 if (unlikely(kvm->mmu_notifier_count))
956 * Ensure the read of mmu_notifier_count happens before the read
957 * of mmu_notifier_seq. This interacts with the smp_wmb() in
958 * mmu_notifier_invalidate_range_end to make sure that the caller
959 * either sees the old (non-zero) value of mmu_notifier_count or
960 * the new (incremented) value of mmu_notifier_seq.
961 * PowerPC Book3s HV KVM calls this under a per-page lock
962 * rather than under kvm->mmu_lock, for scalability, so
963 * can't rely on kvm->mmu_lock to keep things ordered.
966 if (kvm->mmu_notifier_seq != mmu_seq)
972 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
975 #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that...
977 #define KVM_MAX_IRQ_ROUTES 1024
980 int kvm_setup_default_irq_routing(struct kvm *kvm);
981 int kvm_set_irq_routing(struct kvm *kvm,
982 const struct kvm_irq_routing_entry *entries,
985 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
986 const struct kvm_irq_routing_entry *ue);
987 void kvm_free_irq_routing(struct kvm *kvm);
991 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
995 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
997 #ifdef CONFIG_HAVE_KVM_EVENTFD
999 void kvm_eventfd_init(struct kvm *kvm);
1000 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
1002 #ifdef CONFIG_HAVE_KVM_IRQFD
1003 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
1004 void kvm_irqfd_release(struct kvm *kvm);
1005 void kvm_irq_routing_update(struct kvm *);
1007 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1012 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1017 static inline void kvm_eventfd_init(struct kvm *kvm) {}
1019 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1024 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1026 #ifdef CONFIG_HAVE_KVM_IRQCHIP
1027 static inline void kvm_irq_routing_update(struct kvm *kvm)
1032 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
1037 #endif /* CONFIG_HAVE_KVM_EVENTFD */
1039 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
1040 static inline bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu)
1042 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
1045 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
1047 return (vcpu->arch.apic_base & MSR_IA32_APICBASE_BSP) != 0;
1050 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
1054 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
1058 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1060 set_bit(req, &vcpu->requests);
1063 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1065 if (test_bit(req, &vcpu->requests)) {
1066 clear_bit(req, &vcpu->requests);
1073 extern bool kvm_rebooting;
1076 struct kvm_device_ops *ops;
1079 struct list_head vm_node;
1082 /* create, destroy, and name are mandatory */
1083 struct kvm_device_ops {
1085 int (*create)(struct kvm_device *dev, u32 type);
1088 * Destroy is responsible for freeing dev.
1090 * Destroy may be called before or after destructors are called
1091 * on emulated I/O regions, depending on whether a reference is
1092 * held by a vcpu or other kvm component that gets destroyed
1093 * after the emulated I/O.
1095 void (*destroy)(struct kvm_device *dev);
1097 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1098 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1099 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1100 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1104 void kvm_device_get(struct kvm_device *dev);
1105 void kvm_device_put(struct kvm_device *dev);
1106 struct kvm_device *kvm_device_from_filp(struct file *filp);
1107 int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type);
1108 void kvm_unregister_device_ops(u32 type);
1110 extern struct kvm_device_ops kvm_mpic_ops;
1111 extern struct kvm_device_ops kvm_xics_ops;
1112 extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
1113 extern struct kvm_device_ops kvm_arm_vgic_v3_ops;
1115 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1117 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1119 vcpu->spin_loop.in_spin_loop = val;
1121 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1123 vcpu->spin_loop.dy_eligible = val;
1126 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1128 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1132 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1135 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */