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
142 #define KVM_REQ_HV_CRASH 27
144 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
145 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
147 extern struct kmem_cache *kvm_vcpu_cache;
149 extern spinlock_t kvm_lock;
150 extern struct list_head vm_list;
152 struct kvm_io_range {
155 struct kvm_io_device *dev;
158 #define NR_IOBUS_DEVS 1000
163 struct kvm_io_range range[];
169 KVM_VIRTIO_CCW_NOTIFY_BUS,
174 int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
175 int len, const void *val);
176 int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx,
177 gpa_t addr, int len, const void *val, long cookie);
178 int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
180 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
181 int len, struct kvm_io_device *dev);
182 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
183 struct kvm_io_device *dev);
185 #ifdef CONFIG_KVM_ASYNC_PF
186 struct kvm_async_pf {
187 struct work_struct work;
188 struct list_head link;
189 struct list_head queue;
190 struct kvm_vcpu *vcpu;
191 struct mm_struct *mm;
194 struct kvm_arch_async_pf arch;
198 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
199 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
200 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva,
201 struct kvm_arch_async_pf *arch);
202 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
209 READING_SHADOW_PAGE_TABLES,
213 * Sometimes a large or cross-page mmio needs to be broken up into separate
214 * exits for userspace servicing.
216 struct kvm_mmio_fragment {
224 #ifdef CONFIG_PREEMPT_NOTIFIERS
225 struct preempt_notifier preempt_notifier;
231 unsigned long requests;
232 unsigned long guest_debug;
238 int guest_fpu_loaded, guest_xcr0_loaded;
239 unsigned char fpu_counter;
240 wait_queue_head_t wq;
244 struct kvm_vcpu_stat stat;
246 #ifdef CONFIG_HAS_IOMEM
248 int mmio_read_completed;
250 int mmio_cur_fragment;
251 int mmio_nr_fragments;
252 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
255 #ifdef CONFIG_KVM_ASYNC_PF
258 struct list_head queue;
259 struct list_head done;
264 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
266 * Cpu relax intercept or pause loop exit optimization
267 * in_spin_loop: set when a vcpu does a pause loop exit
268 * or cpu relax intercepted.
269 * dy_eligible: indicates whether vcpu is eligible for directed yield.
277 struct kvm_vcpu_arch arch;
280 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
282 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
286 * Some of the bitops functions do not support too long bitmaps.
287 * This number must be determined not to exceed such limits.
289 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
291 struct kvm_memory_slot {
293 unsigned long npages;
294 unsigned long *dirty_bitmap;
295 struct kvm_arch_memory_slot arch;
296 unsigned long userspace_addr;
301 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
303 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
306 struct kvm_s390_adapter_int {
314 struct kvm_kernel_irq_routing_entry {
317 int (*set)(struct kvm_kernel_irq_routing_entry *e,
318 struct kvm *kvm, int irq_source_id, int level,
326 struct kvm_s390_adapter_int adapter;
328 struct hlist_node link;
331 #ifndef KVM_PRIVATE_MEM_SLOTS
332 #define KVM_PRIVATE_MEM_SLOTS 0
335 #ifndef KVM_MEM_SLOTS_NUM
336 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
339 #ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
340 static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
348 * memslots are not sorted by id anymore, please use id_to_memslot()
349 * to get the memslot by its id.
351 struct kvm_memslots {
353 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
354 /* The mapping table from slot id to the index in memslots[]. */
355 short id_to_index[KVM_MEM_SLOTS_NUM];
362 struct mutex slots_lock;
363 struct mm_struct *mm; /* userspace tied to this vm */
364 struct kvm_memslots *memslots[KVM_ADDRESS_SPACE_NUM];
365 struct srcu_struct srcu;
366 struct srcu_struct irq_srcu;
367 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
370 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
371 atomic_t online_vcpus;
372 int last_boosted_vcpu;
373 struct list_head vm_list;
375 struct kvm_io_bus *buses[KVM_NR_BUSES];
376 #ifdef CONFIG_HAVE_KVM_EVENTFD
379 struct list_head items;
380 struct list_head resampler_list;
381 struct mutex resampler_lock;
383 struct list_head ioeventfds;
385 struct kvm_vm_stat stat;
386 struct kvm_arch arch;
387 atomic_t users_count;
388 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
389 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
390 spinlock_t ring_lock;
391 struct list_head coalesced_zones;
394 struct mutex irq_lock;
395 #ifdef CONFIG_HAVE_KVM_IRQCHIP
397 * Update side is protected by irq_lock.
399 struct kvm_irq_routing_table __rcu *irq_routing;
401 #ifdef CONFIG_HAVE_KVM_IRQFD
402 struct hlist_head irq_ack_notifier_list;
405 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
406 struct mmu_notifier mmu_notifier;
407 unsigned long mmu_notifier_seq;
408 long mmu_notifier_count;
411 struct list_head devices;
414 #define kvm_err(fmt, ...) \
415 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
416 #define kvm_info(fmt, ...) \
417 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
418 #define kvm_debug(fmt, ...) \
419 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
420 #define kvm_pr_unimpl(fmt, ...) \
421 pr_err_ratelimited("kvm [%i]: " fmt, \
422 task_tgid_nr(current), ## __VA_ARGS__)
424 /* The guest did something we don't support. */
425 #define vcpu_unimpl(vcpu, fmt, ...) \
426 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
428 #define vcpu_debug(vcpu, fmt, ...) \
429 kvm_debug("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
431 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
434 return kvm->vcpus[i];
437 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
439 idx < atomic_read(&kvm->online_vcpus) && \
440 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
443 #define kvm_for_each_memslot(memslot, slots) \
444 for (memslot = &slots->memslots[0]; \
445 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
448 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
449 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
451 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
452 void vcpu_put(struct kvm_vcpu *vcpu);
454 #ifdef __KVM_HAVE_IOAPIC
455 void kvm_vcpu_request_scan_ioapic(struct kvm *kvm);
457 static inline void kvm_vcpu_request_scan_ioapic(struct kvm *kvm)
462 #ifdef CONFIG_HAVE_KVM_IRQFD
463 int kvm_irqfd_init(void);
464 void kvm_irqfd_exit(void);
466 static inline int kvm_irqfd_init(void)
471 static inline void kvm_irqfd_exit(void)
475 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
476 struct module *module);
479 void kvm_get_kvm(struct kvm *kvm);
480 void kvm_put_kvm(struct kvm *kvm);
482 static inline struct kvm_memslots *__kvm_memslots(struct kvm *kvm, int as_id)
484 return rcu_dereference_check(kvm->memslots[as_id],
485 srcu_read_lock_held(&kvm->srcu)
486 || lockdep_is_held(&kvm->slots_lock));
489 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
491 return __kvm_memslots(kvm, 0);
494 static inline struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu)
496 int as_id = kvm_arch_vcpu_memslots_id(vcpu);
498 return __kvm_memslots(vcpu->kvm, as_id);
501 static inline struct kvm_memory_slot *
502 id_to_memslot(struct kvm_memslots *slots, int id)
504 int index = slots->id_to_index[id];
505 struct kvm_memory_slot *slot;
507 slot = &slots->memslots[index];
509 WARN_ON(slot->id != id);
514 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
515 * - create a new memory slot
516 * - delete an existing memory slot
517 * - modify an existing memory slot
518 * -- move it in the guest physical memory space
519 * -- just change its flags
521 * Since flags can be changed by some of these operations, the following
522 * differentiation is the best we can do for __kvm_set_memory_region():
531 int kvm_set_memory_region(struct kvm *kvm,
532 const struct kvm_userspace_memory_region *mem);
533 int __kvm_set_memory_region(struct kvm *kvm,
534 const struct kvm_userspace_memory_region *mem);
535 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
536 struct kvm_memory_slot *dont);
537 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
538 unsigned long npages);
539 void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots);
540 int kvm_arch_prepare_memory_region(struct kvm *kvm,
541 struct kvm_memory_slot *memslot,
542 const struct kvm_userspace_memory_region *mem,
543 enum kvm_mr_change change);
544 void kvm_arch_commit_memory_region(struct kvm *kvm,
545 const struct kvm_userspace_memory_region *mem,
546 const struct kvm_memory_slot *old,
547 const struct kvm_memory_slot *new,
548 enum kvm_mr_change change);
549 bool kvm_largepages_enabled(void);
550 void kvm_disable_largepages(void);
551 /* flush all memory translations */
552 void kvm_arch_flush_shadow_all(struct kvm *kvm);
553 /* flush memory translations pointing to 'slot' */
554 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
555 struct kvm_memory_slot *slot);
557 int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn,
558 struct page **pages, int nr_pages);
560 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
561 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
562 unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable);
563 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
564 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn,
566 void kvm_release_page_clean(struct page *page);
567 void kvm_release_page_dirty(struct page *page);
568 void kvm_set_page_accessed(struct page *page);
570 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
571 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
572 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
574 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
575 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
576 pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn, bool atomic,
577 bool *async, bool write_fault, bool *writable);
579 void kvm_release_pfn_clean(pfn_t pfn);
580 void kvm_set_pfn_dirty(pfn_t pfn);
581 void kvm_set_pfn_accessed(pfn_t pfn);
582 void kvm_get_pfn(pfn_t pfn);
584 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
586 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
588 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
589 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
590 void *data, unsigned long len);
591 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
592 int offset, int len);
593 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
595 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
596 void *data, unsigned long len);
597 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
598 gpa_t gpa, unsigned long len);
599 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
600 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
601 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
602 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
603 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
604 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
606 struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu);
607 struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn);
608 pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn);
609 pfn_t kvm_vcpu_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
610 struct page *kvm_vcpu_gfn_to_page(struct kvm_vcpu *vcpu, gfn_t gfn);
611 unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn);
612 unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu *vcpu, gfn_t gfn, bool *writable);
613 int kvm_vcpu_read_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, void *data, int offset,
615 int kvm_vcpu_read_guest_atomic(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
617 int kvm_vcpu_read_guest(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
619 int kvm_vcpu_write_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, const void *data,
620 int offset, int len);
621 int kvm_vcpu_write_guest(struct kvm_vcpu *vcpu, gpa_t gpa, const void *data,
623 void kvm_vcpu_mark_page_dirty(struct kvm_vcpu *vcpu, gfn_t gfn);
625 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
626 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
627 int kvm_vcpu_yield_to(struct kvm_vcpu *target);
628 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
629 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
630 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
632 void kvm_flush_remote_tlbs(struct kvm *kvm);
633 void kvm_reload_remote_mmus(struct kvm *kvm);
634 void kvm_make_mclock_inprogress_request(struct kvm *kvm);
635 void kvm_make_scan_ioapic_request(struct kvm *kvm);
636 bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);
638 long kvm_arch_dev_ioctl(struct file *filp,
639 unsigned int ioctl, unsigned long arg);
640 long kvm_arch_vcpu_ioctl(struct file *filp,
641 unsigned int ioctl, unsigned long arg);
642 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
644 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext);
646 int kvm_get_dirty_log(struct kvm *kvm,
647 struct kvm_dirty_log *log, int *is_dirty);
649 int kvm_get_dirty_log_protect(struct kvm *kvm,
650 struct kvm_dirty_log *log, bool *is_dirty);
652 void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
653 struct kvm_memory_slot *slot,
657 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
658 struct kvm_dirty_log *log);
660 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
662 long kvm_arch_vm_ioctl(struct file *filp,
663 unsigned int ioctl, unsigned long arg);
665 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
666 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
668 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
669 struct kvm_translation *tr);
671 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
672 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
673 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
674 struct kvm_sregs *sregs);
675 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
676 struct kvm_sregs *sregs);
677 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
678 struct kvm_mp_state *mp_state);
679 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
680 struct kvm_mp_state *mp_state);
681 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
682 struct kvm_guest_debug *dbg);
683 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
685 int kvm_arch_init(void *opaque);
686 void kvm_arch_exit(void);
688 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
689 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
691 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);
693 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
694 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
695 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
696 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
697 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
698 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
699 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
701 int kvm_arch_hardware_enable(void);
702 void kvm_arch_hardware_disable(void);
703 int kvm_arch_hardware_setup(void);
704 void kvm_arch_hardware_unsetup(void);
705 void kvm_arch_check_processor_compat(void *rtn);
706 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
707 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
709 void *kvm_kvzalloc(unsigned long size);
711 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
712 static inline struct kvm *kvm_arch_alloc_vm(void)
714 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
717 static inline void kvm_arch_free_vm(struct kvm *kvm)
723 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
724 void kvm_arch_register_noncoherent_dma(struct kvm *kvm);
725 void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm);
726 bool kvm_arch_has_noncoherent_dma(struct kvm *kvm);
728 static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm)
732 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm)
736 static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
741 #ifdef __KVM_HAVE_ARCH_ASSIGNED_DEVICE
742 void kvm_arch_start_assignment(struct kvm *kvm);
743 void kvm_arch_end_assignment(struct kvm *kvm);
744 bool kvm_arch_has_assigned_device(struct kvm *kvm);
746 static inline void kvm_arch_start_assignment(struct kvm *kvm)
750 static inline void kvm_arch_end_assignment(struct kvm *kvm)
754 static inline bool kvm_arch_has_assigned_device(struct kvm *kvm)
760 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
762 #ifdef __KVM_HAVE_ARCH_WQP
763 return vcpu->arch.wqp;
769 #ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
771 * returns true if the virtual interrupt controller is initialized and
772 * ready to accept virtual IRQ. On some architectures the virtual interrupt
773 * controller is dynamically instantiated and this is not always true.
775 bool kvm_arch_intc_initialized(struct kvm *kvm);
777 static inline bool kvm_arch_intc_initialized(struct kvm *kvm)
783 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
784 void kvm_arch_destroy_vm(struct kvm *kvm);
785 void kvm_arch_sync_events(struct kvm *kvm);
787 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
788 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
790 bool kvm_is_reserved_pfn(pfn_t pfn);
792 struct kvm_irq_ack_notifier {
793 struct hlist_node link;
795 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
798 int kvm_irq_map_gsi(struct kvm *kvm,
799 struct kvm_kernel_irq_routing_entry *entries, int gsi);
800 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin);
802 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
804 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);
805 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
806 int irq_source_id, int level, bool line_status);
807 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
808 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
809 void kvm_register_irq_ack_notifier(struct kvm *kvm,
810 struct kvm_irq_ack_notifier *kian);
811 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
812 struct kvm_irq_ack_notifier *kian);
813 int kvm_request_irq_source_id(struct kvm *kvm);
814 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
816 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
817 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
818 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
820 static inline int kvm_iommu_map_pages(struct kvm *kvm,
821 struct kvm_memory_slot *slot)
826 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
827 struct kvm_memory_slot *slot)
832 /* must be called with irqs disabled */
833 static inline void __kvm_guest_enter(void)
836 /* KVM does not hold any references to rcu protected data when it
837 * switches CPU into a guest mode. In fact switching to a guest mode
838 * is very similar to exiting to userspace from rcu point of view. In
839 * addition CPU may stay in a guest mode for quite a long time (up to
840 * one time slice). Lets treat guest mode as quiescent state, just like
841 * we do with user-mode execution.
843 if (!context_tracking_cpu_is_enabled())
844 rcu_virt_note_context_switch(smp_processor_id());
847 /* must be called with irqs disabled */
848 static inline void __kvm_guest_exit(void)
853 static inline void kvm_guest_enter(void)
857 local_irq_save(flags);
859 local_irq_restore(flags);
862 static inline void kvm_guest_exit(void)
866 local_irq_save(flags);
868 local_irq_restore(flags);
872 * search_memslots() and __gfn_to_memslot() are here because they are
873 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
874 * gfn_to_memslot() itself isn't here as an inline because that would
875 * bloat other code too much.
877 static inline struct kvm_memory_slot *
878 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
880 int start = 0, end = slots->used_slots;
881 int slot = atomic_read(&slots->lru_slot);
882 struct kvm_memory_slot *memslots = slots->memslots;
884 if (gfn >= memslots[slot].base_gfn &&
885 gfn < memslots[slot].base_gfn + memslots[slot].npages)
886 return &memslots[slot];
888 while (start < end) {
889 slot = start + (end - start) / 2;
891 if (gfn >= memslots[slot].base_gfn)
897 if (gfn >= memslots[start].base_gfn &&
898 gfn < memslots[start].base_gfn + memslots[start].npages) {
899 atomic_set(&slots->lru_slot, start);
900 return &memslots[start];
906 static inline struct kvm_memory_slot *
907 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
909 return search_memslots(slots, gfn);
912 static inline unsigned long
913 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
915 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
918 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
920 return gfn_to_memslot(kvm, gfn)->id;
924 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
926 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
928 return slot->base_gfn + gfn_offset;
931 static inline gpa_t gfn_to_gpa(gfn_t gfn)
933 return (gpa_t)gfn << PAGE_SHIFT;
936 static inline gfn_t gpa_to_gfn(gpa_t gpa)
938 return (gfn_t)(gpa >> PAGE_SHIFT);
941 static inline hpa_t pfn_to_hpa(pfn_t pfn)
943 return (hpa_t)pfn << PAGE_SHIFT;
946 static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa)
948 unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
950 return kvm_is_error_hva(hva);
953 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
955 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
963 struct kvm_stats_debugfs_item {
966 enum kvm_stat_kind kind;
967 struct dentry *dentry;
969 extern struct kvm_stats_debugfs_item debugfs_entries[];
970 extern struct dentry *kvm_debugfs_dir;
972 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
973 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
975 if (unlikely(kvm->mmu_notifier_count))
978 * Ensure the read of mmu_notifier_count happens before the read
979 * of mmu_notifier_seq. This interacts with the smp_wmb() in
980 * mmu_notifier_invalidate_range_end to make sure that the caller
981 * either sees the old (non-zero) value of mmu_notifier_count or
982 * the new (incremented) value of mmu_notifier_seq.
983 * PowerPC Book3s HV KVM calls this under a per-page lock
984 * rather than under kvm->mmu_lock, for scalability, so
985 * can't rely on kvm->mmu_lock to keep things ordered.
988 if (kvm->mmu_notifier_seq != mmu_seq)
994 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
997 #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that...
999 #define KVM_MAX_IRQ_ROUTES 1024
1002 int kvm_setup_default_irq_routing(struct kvm *kvm);
1003 int kvm_set_irq_routing(struct kvm *kvm,
1004 const struct kvm_irq_routing_entry *entries,
1007 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
1008 const struct kvm_irq_routing_entry *ue);
1009 void kvm_free_irq_routing(struct kvm *kvm);
1013 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
1017 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
1019 #ifdef CONFIG_HAVE_KVM_EVENTFD
1021 void kvm_eventfd_init(struct kvm *kvm);
1022 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
1024 #ifdef CONFIG_HAVE_KVM_IRQFD
1025 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
1026 void kvm_irqfd_release(struct kvm *kvm);
1027 void kvm_irq_routing_update(struct kvm *);
1029 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1034 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1039 static inline void kvm_eventfd_init(struct kvm *kvm) {}
1041 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1046 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1048 #ifdef CONFIG_HAVE_KVM_IRQCHIP
1049 static inline void kvm_irq_routing_update(struct kvm *kvm)
1054 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
1059 #endif /* CONFIG_HAVE_KVM_EVENTFD */
1061 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
1062 static inline bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu)
1064 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
1067 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
1069 return (vcpu->arch.apic_base & MSR_IA32_APICBASE_BSP) != 0;
1072 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
1076 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
1080 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1082 set_bit(req, &vcpu->requests);
1085 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1087 if (test_bit(req, &vcpu->requests)) {
1088 clear_bit(req, &vcpu->requests);
1095 extern bool kvm_rebooting;
1098 struct kvm_device_ops *ops;
1101 struct list_head vm_node;
1104 /* create, destroy, and name are mandatory */
1105 struct kvm_device_ops {
1107 int (*create)(struct kvm_device *dev, u32 type);
1110 * Destroy is responsible for freeing dev.
1112 * Destroy may be called before or after destructors are called
1113 * on emulated I/O regions, depending on whether a reference is
1114 * held by a vcpu or other kvm component that gets destroyed
1115 * after the emulated I/O.
1117 void (*destroy)(struct kvm_device *dev);
1119 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1120 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1121 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1122 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1126 void kvm_device_get(struct kvm_device *dev);
1127 void kvm_device_put(struct kvm_device *dev);
1128 struct kvm_device *kvm_device_from_filp(struct file *filp);
1129 int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type);
1130 void kvm_unregister_device_ops(u32 type);
1132 extern struct kvm_device_ops kvm_mpic_ops;
1133 extern struct kvm_device_ops kvm_xics_ops;
1134 extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
1135 extern struct kvm_device_ops kvm_arm_vgic_v3_ops;
1137 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1139 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1141 vcpu->spin_loop.in_spin_loop = val;
1143 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1145 vcpu->spin_loop.dy_eligible = val;
1148 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1150 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1154 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1157 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */