1 /* SPDX-License-Identifier: GPL-2.0-only */
6 #include <linux/types.h>
7 #include <linux/hardirq.h>
8 #include <linux/list.h>
9 #include <linux/mutex.h>
10 #include <linux/spinlock.h>
11 #include <linux/signal.h>
12 #include <linux/sched.h>
13 #include <linux/bug.h>
15 #include <linux/mmu_notifier.h>
16 #include <linux/preempt.h>
17 #include <linux/msi.h>
18 #include <linux/slab.h>
19 #include <linux/vmalloc.h>
20 #include <linux/rcupdate.h>
21 #include <linux/ratelimit.h>
22 #include <linux/err.h>
23 #include <linux/irqflags.h>
24 #include <linux/context_tracking.h>
25 #include <linux/irqbypass.h>
26 #include <linux/swait.h>
27 #include <linux/refcount.h>
28 #include <linux/nospec.h>
29 #include <asm/signal.h>
31 #include <linux/kvm.h>
32 #include <linux/kvm_para.h>
34 #include <linux/kvm_types.h>
36 #include <asm/kvm_host.h>
38 #ifndef KVM_MAX_VCPU_ID
39 #define KVM_MAX_VCPU_ID KVM_MAX_VCPUS
43 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
44 * in kvm, other bits are visible for userspace which are defined in
45 * include/linux/kvm_h.
47 #define KVM_MEMSLOT_INVALID (1UL << 16)
50 * Bit 63 of the memslot generation number is an "update in-progress flag",
51 * e.g. is temporarily set for the duration of install_new_memslots().
52 * This flag effectively creates a unique generation number that is used to
53 * mark cached memslot data, e.g. MMIO accesses, as potentially being stale,
54 * i.e. may (or may not) have come from the previous memslots generation.
56 * This is necessary because the actual memslots update is not atomic with
57 * respect to the generation number update. Updating the generation number
58 * first would allow a vCPU to cache a spte from the old memslots using the
59 * new generation number, and updating the generation number after switching
60 * to the new memslots would allow cache hits using the old generation number
61 * to reference the defunct memslots.
63 * This mechanism is used to prevent getting hits in KVM's caches while a
64 * memslot update is in-progress, and to prevent cache hits *after* updating
65 * the actual generation number against accesses that were inserted into the
66 * cache *before* the memslots were updated.
68 #define KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS BIT_ULL(63)
70 /* Two fragments for cross MMIO pages. */
71 #define KVM_MAX_MMIO_FRAGMENTS 2
73 #ifndef KVM_ADDRESS_SPACE_NUM
74 #define KVM_ADDRESS_SPACE_NUM 1
78 * For the normal pfn, the highest 12 bits should be zero,
79 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
80 * mask bit 63 to indicate the noslot pfn.
82 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
83 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
84 #define KVM_PFN_NOSLOT (0x1ULL << 63)
86 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
87 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
88 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
91 * error pfns indicate that the gfn is in slot but faild to
92 * translate it to pfn on host.
94 static inline bool is_error_pfn(kvm_pfn_t pfn
)
96 return !!(pfn
& KVM_PFN_ERR_MASK
);
100 * error_noslot pfns indicate that the gfn can not be
101 * translated to pfn - it is not in slot or failed to
102 * translate it to pfn.
104 static inline bool is_error_noslot_pfn(kvm_pfn_t pfn
)
106 return !!(pfn
& KVM_PFN_ERR_NOSLOT_MASK
);
109 /* noslot pfn indicates that the gfn is not in slot. */
110 static inline bool is_noslot_pfn(kvm_pfn_t pfn
)
112 return pfn
== KVM_PFN_NOSLOT
;
116 * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390)
117 * provide own defines and kvm_is_error_hva
119 #ifndef KVM_HVA_ERR_BAD
121 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
122 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
124 static inline bool kvm_is_error_hva(unsigned long addr
)
126 return addr
>= PAGE_OFFSET
;
131 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
133 static inline bool is_error_page(struct page
*page
)
138 #define KVM_REQUEST_MASK GENMASK(7,0)
139 #define KVM_REQUEST_NO_WAKEUP BIT(8)
140 #define KVM_REQUEST_WAIT BIT(9)
142 * Architecture-independent vcpu->requests bit members
143 * Bits 4-7 are reserved for more arch-independent bits.
145 #define KVM_REQ_TLB_FLUSH (0 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
146 #define KVM_REQ_MMU_RELOAD (1 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
147 #define KVM_REQ_PENDING_TIMER 2
148 #define KVM_REQ_UNHALT 3
149 #define KVM_REQUEST_ARCH_BASE 8
151 #define KVM_ARCH_REQ_FLAGS(nr, flags) ({ \
152 BUILD_BUG_ON((unsigned)(nr) >= (FIELD_SIZEOF(struct kvm_vcpu, requests) * 8) - KVM_REQUEST_ARCH_BASE); \
153 (unsigned)(((nr) + KVM_REQUEST_ARCH_BASE) | (flags)); \
155 #define KVM_ARCH_REQ(nr) KVM_ARCH_REQ_FLAGS(nr, 0)
157 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
158 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
160 extern struct kmem_cache
*kvm_vcpu_cache
;
162 extern struct mutex kvm_lock
;
163 extern struct list_head vm_list
;
165 struct kvm_io_range
{
168 struct kvm_io_device
*dev
;
171 #define NR_IOBUS_DEVS 1000
176 struct kvm_io_range range
[];
182 KVM_VIRTIO_CCW_NOTIFY_BUS
,
187 int kvm_io_bus_write(struct kvm_vcpu
*vcpu
, enum kvm_bus bus_idx
, gpa_t addr
,
188 int len
, const void *val
);
189 int kvm_io_bus_write_cookie(struct kvm_vcpu
*vcpu
, enum kvm_bus bus_idx
,
190 gpa_t addr
, int len
, const void *val
, long cookie
);
191 int kvm_io_bus_read(struct kvm_vcpu
*vcpu
, enum kvm_bus bus_idx
, gpa_t addr
,
193 int kvm_io_bus_register_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
194 int len
, struct kvm_io_device
*dev
);
195 void kvm_io_bus_unregister_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
,
196 struct kvm_io_device
*dev
);
197 struct kvm_io_device
*kvm_io_bus_get_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
,
200 #ifdef CONFIG_KVM_ASYNC_PF
201 struct kvm_async_pf
{
202 struct work_struct work
;
203 struct list_head link
;
204 struct list_head queue
;
205 struct kvm_vcpu
*vcpu
;
206 struct mm_struct
*mm
;
209 struct kvm_arch_async_pf arch
;
213 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu
*vcpu
);
214 void kvm_check_async_pf_completion(struct kvm_vcpu
*vcpu
);
215 int kvm_setup_async_pf(struct kvm_vcpu
*vcpu
, gva_t gva
, unsigned long hva
,
216 struct kvm_arch_async_pf
*arch
);
217 int kvm_async_pf_wakeup_all(struct kvm_vcpu
*vcpu
);
224 READING_SHADOW_PAGE_TABLES
,
227 #define KVM_UNMAPPED_PAGE ((void *) 0x500 + POISON_POINTER_DELTA)
229 struct kvm_host_map
{
231 * Only valid if the 'pfn' is managed by the host kernel (i.e. There is
232 * a 'struct page' for it. When using mem= kernel parameter some memory
233 * can be used as guest memory but they are not managed by host
235 * If 'pfn' is not managed by the host kernel, this field is
236 * initialized to KVM_UNMAPPED_PAGE.
245 * Used to check if the mapping is valid or not. Never use 'kvm_host_map'
246 * directly to check for that.
248 static inline bool kvm_vcpu_mapped(struct kvm_host_map
*map
)
254 * Sometimes a large or cross-page mmio needs to be broken up into separate
255 * exits for userspace servicing.
257 struct kvm_mmio_fragment
{
265 #ifdef CONFIG_PREEMPT_NOTIFIERS
266 struct preempt_notifier preempt_notifier
;
273 unsigned long guest_debug
;
276 struct list_head blocked_vcpu_list
;
281 int guest_xcr0_loaded
;
282 struct swait_queue_head wq
;
283 struct pid __rcu
*pid
;
286 struct kvm_vcpu_stat stat
;
287 unsigned int halt_poll_ns
;
290 #ifdef CONFIG_HAS_IOMEM
292 int mmio_read_completed
;
294 int mmio_cur_fragment
;
295 int mmio_nr_fragments
;
296 struct kvm_mmio_fragment mmio_fragments
[KVM_MAX_MMIO_FRAGMENTS
];
299 #ifdef CONFIG_KVM_ASYNC_PF
302 struct list_head queue
;
303 struct list_head done
;
308 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
310 * Cpu relax intercept or pause loop exit optimization
311 * in_spin_loop: set when a vcpu does a pause loop exit
312 * or cpu relax intercepted.
313 * dy_eligible: indicates whether vcpu is eligible for directed yield.
322 struct kvm_vcpu_arch arch
;
323 struct dentry
*debugfs_dentry
;
326 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu
*vcpu
)
329 * The memory barrier ensures a previous write to vcpu->requests cannot
330 * be reordered with the read of vcpu->mode. It pairs with the general
331 * memory barrier following the write of vcpu->mode in VCPU RUN.
333 smp_mb__before_atomic();
334 return cmpxchg(&vcpu
->mode
, IN_GUEST_MODE
, EXITING_GUEST_MODE
);
338 * Some of the bitops functions do not support too long bitmaps.
339 * This number must be determined not to exceed such limits.
341 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
343 struct kvm_memory_slot
{
345 unsigned long npages
;
346 unsigned long *dirty_bitmap
;
347 struct kvm_arch_memory_slot arch
;
348 unsigned long userspace_addr
;
353 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot
*memslot
)
355 return ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
358 static inline unsigned long *kvm_second_dirty_bitmap(struct kvm_memory_slot
*memslot
)
360 unsigned long len
= kvm_dirty_bitmap_bytes(memslot
);
362 return memslot
->dirty_bitmap
+ len
/ sizeof(*memslot
->dirty_bitmap
);
365 struct kvm_s390_adapter_int
{
378 struct kvm_kernel_irq_routing_entry
{
381 int (*set
)(struct kvm_kernel_irq_routing_entry
*e
,
382 struct kvm
*kvm
, int irq_source_id
, int level
,
396 struct kvm_s390_adapter_int adapter
;
397 struct kvm_hv_sint hv_sint
;
399 struct hlist_node link
;
402 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
403 struct kvm_irq_routing_table
{
404 int chip
[KVM_NR_IRQCHIPS
][KVM_IRQCHIP_NUM_PINS
];
407 * Array indexed by gsi. Each entry contains list of irq chips
408 * the gsi is connected to.
410 struct hlist_head map
[0];
414 #ifndef KVM_PRIVATE_MEM_SLOTS
415 #define KVM_PRIVATE_MEM_SLOTS 0
418 #ifndef KVM_MEM_SLOTS_NUM
419 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
422 #ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
423 static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu
*vcpu
)
431 * memslots are not sorted by id anymore, please use id_to_memslot()
432 * to get the memslot by its id.
434 struct kvm_memslots
{
436 struct kvm_memory_slot memslots
[KVM_MEM_SLOTS_NUM
];
437 /* The mapping table from slot id to the index in memslots[]. */
438 short id_to_index
[KVM_MEM_SLOTS_NUM
];
445 struct mutex slots_lock
;
446 struct mm_struct
*mm
; /* userspace tied to this vm */
447 struct kvm_memslots __rcu
*memslots
[KVM_ADDRESS_SPACE_NUM
];
448 struct kvm_vcpu
*vcpus
[KVM_MAX_VCPUS
];
451 * created_vcpus is protected by kvm->lock, and is incremented
452 * at the beginning of KVM_CREATE_VCPU. online_vcpus is only
453 * incremented after storing the kvm_vcpu pointer in vcpus,
454 * and is accessed atomically.
456 atomic_t online_vcpus
;
458 int last_boosted_vcpu
;
459 struct list_head vm_list
;
461 struct kvm_io_bus __rcu
*buses
[KVM_NR_BUSES
];
462 #ifdef CONFIG_HAVE_KVM_EVENTFD
465 struct list_head items
;
466 struct list_head resampler_list
;
467 struct mutex resampler_lock
;
469 struct list_head ioeventfds
;
471 struct kvm_vm_stat stat
;
472 struct kvm_arch arch
;
473 refcount_t users_count
;
474 #ifdef CONFIG_KVM_MMIO
475 struct kvm_coalesced_mmio_ring
*coalesced_mmio_ring
;
476 spinlock_t ring_lock
;
477 struct list_head coalesced_zones
;
480 struct mutex irq_lock
;
481 #ifdef CONFIG_HAVE_KVM_IRQCHIP
483 * Update side is protected by irq_lock.
485 struct kvm_irq_routing_table __rcu
*irq_routing
;
487 #ifdef CONFIG_HAVE_KVM_IRQFD
488 struct hlist_head irq_ack_notifier_list
;
491 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
492 struct mmu_notifier mmu_notifier
;
493 unsigned long mmu_notifier_seq
;
494 long mmu_notifier_count
;
497 struct list_head devices
;
498 bool manual_dirty_log_protect
;
499 struct dentry
*debugfs_dentry
;
500 struct kvm_stat_data
**debugfs_stat_data
;
501 struct srcu_struct srcu
;
502 struct srcu_struct irq_srcu
;
506 #define kvm_err(fmt, ...) \
507 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
508 #define kvm_info(fmt, ...) \
509 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
510 #define kvm_debug(fmt, ...) \
511 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
512 #define kvm_debug_ratelimited(fmt, ...) \
513 pr_debug_ratelimited("kvm [%i]: " fmt, task_pid_nr(current), \
515 #define kvm_pr_unimpl(fmt, ...) \
516 pr_err_ratelimited("kvm [%i]: " fmt, \
517 task_tgid_nr(current), ## __VA_ARGS__)
519 /* The guest did something we don't support. */
520 #define vcpu_unimpl(vcpu, fmt, ...) \
521 kvm_pr_unimpl("vcpu%i, guest rIP: 0x%lx " fmt, \
522 (vcpu)->vcpu_id, kvm_rip_read(vcpu), ## __VA_ARGS__)
524 #define vcpu_debug(vcpu, fmt, ...) \
525 kvm_debug("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
526 #define vcpu_debug_ratelimited(vcpu, fmt, ...) \
527 kvm_debug_ratelimited("vcpu%i " fmt, (vcpu)->vcpu_id, \
529 #define vcpu_err(vcpu, fmt, ...) \
530 kvm_err("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
532 static inline struct kvm_io_bus
*kvm_get_bus(struct kvm
*kvm
, enum kvm_bus idx
)
534 return srcu_dereference_check(kvm
->buses
[idx
], &kvm
->srcu
,
535 lockdep_is_held(&kvm
->slots_lock
) ||
536 !refcount_read(&kvm
->users_count
));
539 static inline struct kvm_vcpu
*kvm_get_vcpu(struct kvm
*kvm
, int i
)
541 int num_vcpus
= atomic_read(&kvm
->online_vcpus
);
542 i
= array_index_nospec(i
, num_vcpus
);
544 /* Pairs with smp_wmb() in kvm_vm_ioctl_create_vcpu. */
546 return kvm
->vcpus
[i
];
549 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
551 idx < atomic_read(&kvm->online_vcpus) && \
552 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
555 static inline struct kvm_vcpu
*kvm_get_vcpu_by_id(struct kvm
*kvm
, int id
)
557 struct kvm_vcpu
*vcpu
= NULL
;
562 if (id
< KVM_MAX_VCPUS
)
563 vcpu
= kvm_get_vcpu(kvm
, id
);
564 if (vcpu
&& vcpu
->vcpu_id
== id
)
566 kvm_for_each_vcpu(i
, vcpu
, kvm
)
567 if (vcpu
->vcpu_id
== id
)
572 static inline int kvm_vcpu_get_idx(struct kvm_vcpu
*vcpu
)
574 struct kvm_vcpu
*tmp
;
577 kvm_for_each_vcpu(idx
, tmp
, vcpu
->kvm
)
583 #define kvm_for_each_memslot(memslot, slots) \
584 for (memslot = &slots->memslots[0]; \
585 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
588 int kvm_vcpu_init(struct kvm_vcpu
*vcpu
, struct kvm
*kvm
, unsigned id
);
589 void kvm_vcpu_uninit(struct kvm_vcpu
*vcpu
);
591 void vcpu_load(struct kvm_vcpu
*vcpu
);
592 void vcpu_put(struct kvm_vcpu
*vcpu
);
594 #ifdef __KVM_HAVE_IOAPIC
595 void kvm_arch_post_irq_ack_notifier_list_update(struct kvm
*kvm
);
596 void kvm_arch_post_irq_routing_update(struct kvm
*kvm
);
598 static inline void kvm_arch_post_irq_ack_notifier_list_update(struct kvm
*kvm
)
601 static inline void kvm_arch_post_irq_routing_update(struct kvm
*kvm
)
606 #ifdef CONFIG_HAVE_KVM_IRQFD
607 int kvm_irqfd_init(void);
608 void kvm_irqfd_exit(void);
610 static inline int kvm_irqfd_init(void)
615 static inline void kvm_irqfd_exit(void)
619 int kvm_init(void *opaque
, unsigned vcpu_size
, unsigned vcpu_align
,
620 struct module
*module
);
623 void kvm_get_kvm(struct kvm
*kvm
);
624 void kvm_put_kvm(struct kvm
*kvm
);
626 static inline struct kvm_memslots
*__kvm_memslots(struct kvm
*kvm
, int as_id
)
628 as_id
= array_index_nospec(as_id
, KVM_ADDRESS_SPACE_NUM
);
629 return srcu_dereference_check(kvm
->memslots
[as_id
], &kvm
->srcu
,
630 lockdep_is_held(&kvm
->slots_lock
) ||
631 !refcount_read(&kvm
->users_count
));
634 static inline struct kvm_memslots
*kvm_memslots(struct kvm
*kvm
)
636 return __kvm_memslots(kvm
, 0);
639 static inline struct kvm_memslots
*kvm_vcpu_memslots(struct kvm_vcpu
*vcpu
)
641 int as_id
= kvm_arch_vcpu_memslots_id(vcpu
);
643 return __kvm_memslots(vcpu
->kvm
, as_id
);
646 static inline struct kvm_memory_slot
*
647 id_to_memslot(struct kvm_memslots
*slots
, int id
)
649 int index
= slots
->id_to_index
[id
];
650 struct kvm_memory_slot
*slot
;
652 slot
= &slots
->memslots
[index
];
654 WARN_ON(slot
->id
!= id
);
659 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
660 * - create a new memory slot
661 * - delete an existing memory slot
662 * - modify an existing memory slot
663 * -- move it in the guest physical memory space
664 * -- just change its flags
666 * Since flags can be changed by some of these operations, the following
667 * differentiation is the best we can do for __kvm_set_memory_region():
676 int kvm_set_memory_region(struct kvm
*kvm
,
677 const struct kvm_userspace_memory_region
*mem
);
678 int __kvm_set_memory_region(struct kvm
*kvm
,
679 const struct kvm_userspace_memory_region
*mem
);
680 void kvm_arch_free_memslot(struct kvm
*kvm
, struct kvm_memory_slot
*free
,
681 struct kvm_memory_slot
*dont
);
682 int kvm_arch_create_memslot(struct kvm
*kvm
, struct kvm_memory_slot
*slot
,
683 unsigned long npages
);
684 void kvm_arch_memslots_updated(struct kvm
*kvm
, u64 gen
);
685 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
686 struct kvm_memory_slot
*memslot
,
687 const struct kvm_userspace_memory_region
*mem
,
688 enum kvm_mr_change change
);
689 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
690 const struct kvm_userspace_memory_region
*mem
,
691 const struct kvm_memory_slot
*old
,
692 const struct kvm_memory_slot
*new,
693 enum kvm_mr_change change
);
694 bool kvm_largepages_enabled(void);
695 void kvm_disable_largepages(void);
696 /* flush all memory translations */
697 void kvm_arch_flush_shadow_all(struct kvm
*kvm
);
698 /* flush memory translations pointing to 'slot' */
699 void kvm_arch_flush_shadow_memslot(struct kvm
*kvm
,
700 struct kvm_memory_slot
*slot
);
702 int gfn_to_page_many_atomic(struct kvm_memory_slot
*slot
, gfn_t gfn
,
703 struct page
**pages
, int nr_pages
);
705 struct page
*gfn_to_page(struct kvm
*kvm
, gfn_t gfn
);
706 unsigned long gfn_to_hva(struct kvm
*kvm
, gfn_t gfn
);
707 unsigned long gfn_to_hva_prot(struct kvm
*kvm
, gfn_t gfn
, bool *writable
);
708 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
709 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot
*slot
, gfn_t gfn
,
711 void kvm_release_page_clean(struct page
*page
);
712 void kvm_release_page_dirty(struct page
*page
);
713 void kvm_set_page_accessed(struct page
*page
);
715 kvm_pfn_t
gfn_to_pfn_atomic(struct kvm
*kvm
, gfn_t gfn
);
716 kvm_pfn_t
gfn_to_pfn(struct kvm
*kvm
, gfn_t gfn
);
717 kvm_pfn_t
gfn_to_pfn_prot(struct kvm
*kvm
, gfn_t gfn
, bool write_fault
,
719 kvm_pfn_t
gfn_to_pfn_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
720 kvm_pfn_t
gfn_to_pfn_memslot_atomic(struct kvm_memory_slot
*slot
, gfn_t gfn
);
721 kvm_pfn_t
__gfn_to_pfn_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
,
722 bool atomic
, bool *async
, bool write_fault
,
725 void kvm_release_pfn_clean(kvm_pfn_t pfn
);
726 void kvm_release_pfn_dirty(kvm_pfn_t pfn
);
727 void kvm_set_pfn_dirty(kvm_pfn_t pfn
);
728 void kvm_set_pfn_accessed(kvm_pfn_t pfn
);
729 void kvm_get_pfn(kvm_pfn_t pfn
);
731 int kvm_read_guest_page(struct kvm
*kvm
, gfn_t gfn
, void *data
, int offset
,
733 int kvm_read_guest_atomic(struct kvm
*kvm
, gpa_t gpa
, void *data
,
735 int kvm_read_guest(struct kvm
*kvm
, gpa_t gpa
, void *data
, unsigned long len
);
736 int kvm_read_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
737 void *data
, unsigned long len
);
738 int kvm_write_guest_page(struct kvm
*kvm
, gfn_t gfn
, const void *data
,
739 int offset
, int len
);
740 int kvm_write_guest(struct kvm
*kvm
, gpa_t gpa
, const void *data
,
742 int kvm_write_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
743 void *data
, unsigned long len
);
744 int kvm_write_guest_offset_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
745 void *data
, unsigned int offset
,
747 int kvm_gfn_to_hva_cache_init(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
748 gpa_t gpa
, unsigned long len
);
749 int kvm_clear_guest_page(struct kvm
*kvm
, gfn_t gfn
, int offset
, int len
);
750 int kvm_clear_guest(struct kvm
*kvm
, gpa_t gpa
, unsigned long len
);
751 struct kvm_memory_slot
*gfn_to_memslot(struct kvm
*kvm
, gfn_t gfn
);
752 bool kvm_is_visible_gfn(struct kvm
*kvm
, gfn_t gfn
);
753 unsigned long kvm_host_page_size(struct kvm
*kvm
, gfn_t gfn
);
754 void mark_page_dirty(struct kvm
*kvm
, gfn_t gfn
);
756 struct kvm_memslots
*kvm_vcpu_memslots(struct kvm_vcpu
*vcpu
);
757 struct kvm_memory_slot
*kvm_vcpu_gfn_to_memslot(struct kvm_vcpu
*vcpu
, gfn_t gfn
);
758 kvm_pfn_t
kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu
*vcpu
, gfn_t gfn
);
759 kvm_pfn_t
kvm_vcpu_gfn_to_pfn(struct kvm_vcpu
*vcpu
, gfn_t gfn
);
760 int kvm_vcpu_map(struct kvm_vcpu
*vcpu
, gpa_t gpa
, struct kvm_host_map
*map
);
761 int kvm_map_gfn(struct kvm_vcpu
*vcpu
, gfn_t gfn
, struct kvm_host_map
*map
);
762 struct page
*kvm_vcpu_gfn_to_page(struct kvm_vcpu
*vcpu
, gfn_t gfn
);
763 void kvm_vcpu_unmap(struct kvm_vcpu
*vcpu
, struct kvm_host_map
*map
, bool dirty
);
764 int kvm_unmap_gfn(struct kvm_vcpu
*vcpu
, struct kvm_host_map
*map
, bool dirty
);
765 unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu
*vcpu
, gfn_t gfn
);
766 unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu
*vcpu
, gfn_t gfn
, bool *writable
);
767 int kvm_vcpu_read_guest_page(struct kvm_vcpu
*vcpu
, gfn_t gfn
, void *data
, int offset
,
769 int kvm_vcpu_read_guest_atomic(struct kvm_vcpu
*vcpu
, gpa_t gpa
, void *data
,
771 int kvm_vcpu_read_guest(struct kvm_vcpu
*vcpu
, gpa_t gpa
, void *data
,
773 int kvm_vcpu_write_guest_page(struct kvm_vcpu
*vcpu
, gfn_t gfn
, const void *data
,
774 int offset
, int len
);
775 int kvm_vcpu_write_guest(struct kvm_vcpu
*vcpu
, gpa_t gpa
, const void *data
,
777 void kvm_vcpu_mark_page_dirty(struct kvm_vcpu
*vcpu
, gfn_t gfn
);
779 void kvm_sigset_activate(struct kvm_vcpu
*vcpu
);
780 void kvm_sigset_deactivate(struct kvm_vcpu
*vcpu
);
782 void kvm_vcpu_block(struct kvm_vcpu
*vcpu
);
783 void kvm_arch_vcpu_blocking(struct kvm_vcpu
*vcpu
);
784 void kvm_arch_vcpu_unblocking(struct kvm_vcpu
*vcpu
);
785 bool kvm_vcpu_wake_up(struct kvm_vcpu
*vcpu
);
786 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
787 int kvm_vcpu_yield_to(struct kvm_vcpu
*target
);
788 void kvm_vcpu_on_spin(struct kvm_vcpu
*vcpu
, bool usermode_vcpu_not_eligible
);
790 void kvm_flush_remote_tlbs(struct kvm
*kvm
);
791 void kvm_reload_remote_mmus(struct kvm
*kvm
);
793 bool kvm_make_vcpus_request_mask(struct kvm
*kvm
, unsigned int req
,
794 unsigned long *vcpu_bitmap
, cpumask_var_t tmp
);
795 bool kvm_make_all_cpus_request(struct kvm
*kvm
, unsigned int req
);
797 long kvm_arch_dev_ioctl(struct file
*filp
,
798 unsigned int ioctl
, unsigned long arg
);
799 long kvm_arch_vcpu_ioctl(struct file
*filp
,
800 unsigned int ioctl
, unsigned long arg
);
801 vm_fault_t
kvm_arch_vcpu_fault(struct kvm_vcpu
*vcpu
, struct vm_fault
*vmf
);
803 int kvm_vm_ioctl_check_extension(struct kvm
*kvm
, long ext
);
805 int kvm_get_dirty_log(struct kvm
*kvm
,
806 struct kvm_dirty_log
*log
, int *is_dirty
);
808 int kvm_get_dirty_log_protect(struct kvm
*kvm
,
809 struct kvm_dirty_log
*log
, bool *flush
);
810 int kvm_clear_dirty_log_protect(struct kvm
*kvm
,
811 struct kvm_clear_dirty_log
*log
, bool *flush
);
813 void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm
*kvm
,
814 struct kvm_memory_slot
*slot
,
818 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
819 struct kvm_dirty_log
*log
);
820 int kvm_vm_ioctl_clear_dirty_log(struct kvm
*kvm
,
821 struct kvm_clear_dirty_log
*log
);
823 int kvm_vm_ioctl_irq_line(struct kvm
*kvm
, struct kvm_irq_level
*irq_level
,
825 int kvm_vm_ioctl_enable_cap(struct kvm
*kvm
,
826 struct kvm_enable_cap
*cap
);
827 long kvm_arch_vm_ioctl(struct file
*filp
,
828 unsigned int ioctl
, unsigned long arg
);
830 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
831 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
833 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
834 struct kvm_translation
*tr
);
836 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
837 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
838 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
839 struct kvm_sregs
*sregs
);
840 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
841 struct kvm_sregs
*sregs
);
842 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
843 struct kvm_mp_state
*mp_state
);
844 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
845 struct kvm_mp_state
*mp_state
);
846 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
847 struct kvm_guest_debug
*dbg
);
848 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
);
850 int kvm_arch_init(void *opaque
);
851 void kvm_arch_exit(void);
853 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
);
854 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
);
856 void kvm_arch_sched_in(struct kvm_vcpu
*vcpu
, int cpu
);
858 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
);
859 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
);
860 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
);
861 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
, unsigned int id
);
862 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
);
863 void kvm_arch_vcpu_postcreate(struct kvm_vcpu
*vcpu
);
864 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
);
866 #ifdef __KVM_HAVE_ARCH_VCPU_DEBUGFS
867 void kvm_arch_create_vcpu_debugfs(struct kvm_vcpu
*vcpu
);
870 int kvm_arch_hardware_enable(void);
871 void kvm_arch_hardware_disable(void);
872 int kvm_arch_hardware_setup(void);
873 void kvm_arch_hardware_unsetup(void);
874 int kvm_arch_check_processor_compat(void);
875 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
);
876 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu
*vcpu
);
877 int kvm_arch_vcpu_should_kick(struct kvm_vcpu
*vcpu
);
878 bool kvm_arch_dy_runnable(struct kvm_vcpu
*vcpu
);
880 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
882 * All architectures that want to use vzalloc currently also
883 * need their own kvm_arch_alloc_vm implementation.
885 static inline struct kvm
*kvm_arch_alloc_vm(void)
887 return kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
890 static inline void kvm_arch_free_vm(struct kvm
*kvm
)
896 #ifndef __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB
897 static inline int kvm_arch_flush_remote_tlb(struct kvm
*kvm
)
903 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
904 void kvm_arch_register_noncoherent_dma(struct kvm
*kvm
);
905 void kvm_arch_unregister_noncoherent_dma(struct kvm
*kvm
);
906 bool kvm_arch_has_noncoherent_dma(struct kvm
*kvm
);
908 static inline void kvm_arch_register_noncoherent_dma(struct kvm
*kvm
)
912 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm
*kvm
)
916 static inline bool kvm_arch_has_noncoherent_dma(struct kvm
*kvm
)
921 #ifdef __KVM_HAVE_ARCH_ASSIGNED_DEVICE
922 void kvm_arch_start_assignment(struct kvm
*kvm
);
923 void kvm_arch_end_assignment(struct kvm
*kvm
);
924 bool kvm_arch_has_assigned_device(struct kvm
*kvm
);
926 static inline void kvm_arch_start_assignment(struct kvm
*kvm
)
930 static inline void kvm_arch_end_assignment(struct kvm
*kvm
)
934 static inline bool kvm_arch_has_assigned_device(struct kvm
*kvm
)
940 static inline struct swait_queue_head
*kvm_arch_vcpu_wq(struct kvm_vcpu
*vcpu
)
942 #ifdef __KVM_HAVE_ARCH_WQP
943 return vcpu
->arch
.wqp
;
949 #ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
951 * returns true if the virtual interrupt controller is initialized and
952 * ready to accept virtual IRQ. On some architectures the virtual interrupt
953 * controller is dynamically instantiated and this is not always true.
955 bool kvm_arch_intc_initialized(struct kvm
*kvm
);
957 static inline bool kvm_arch_intc_initialized(struct kvm
*kvm
)
963 int kvm_arch_init_vm(struct kvm
*kvm
, unsigned long type
);
964 void kvm_arch_destroy_vm(struct kvm
*kvm
);
965 void kvm_arch_sync_events(struct kvm
*kvm
);
967 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
);
968 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
970 bool kvm_is_reserved_pfn(kvm_pfn_t pfn
);
971 bool kvm_is_zone_device_pfn(kvm_pfn_t pfn
);
973 struct kvm_irq_ack_notifier
{
974 struct hlist_node link
;
976 void (*irq_acked
)(struct kvm_irq_ack_notifier
*kian
);
979 int kvm_irq_map_gsi(struct kvm
*kvm
,
980 struct kvm_kernel_irq_routing_entry
*entries
, int gsi
);
981 int kvm_irq_map_chip_pin(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
983 int kvm_set_irq(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
,
985 int kvm_set_msi(struct kvm_kernel_irq_routing_entry
*irq_entry
, struct kvm
*kvm
,
986 int irq_source_id
, int level
, bool line_status
);
987 int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry
*e
,
988 struct kvm
*kvm
, int irq_source_id
,
989 int level
, bool line_status
);
990 bool kvm_irq_has_notifier(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
991 void kvm_notify_acked_gsi(struct kvm
*kvm
, int gsi
);
992 void kvm_notify_acked_irq(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
993 void kvm_register_irq_ack_notifier(struct kvm
*kvm
,
994 struct kvm_irq_ack_notifier
*kian
);
995 void kvm_unregister_irq_ack_notifier(struct kvm
*kvm
,
996 struct kvm_irq_ack_notifier
*kian
);
997 int kvm_request_irq_source_id(struct kvm
*kvm
);
998 void kvm_free_irq_source_id(struct kvm
*kvm
, int irq_source_id
);
999 bool kvm_arch_irqfd_allowed(struct kvm
*kvm
, struct kvm_irqfd
*args
);
1002 * search_memslots() and __gfn_to_memslot() are here because they are
1003 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
1004 * gfn_to_memslot() itself isn't here as an inline because that would
1005 * bloat other code too much.
1007 static inline struct kvm_memory_slot
*
1008 search_memslots(struct kvm_memslots
*slots
, gfn_t gfn
)
1010 int start
= 0, end
= slots
->used_slots
;
1011 int slot
= atomic_read(&slots
->lru_slot
);
1012 struct kvm_memory_slot
*memslots
= slots
->memslots
;
1014 if (gfn
>= memslots
[slot
].base_gfn
&&
1015 gfn
< memslots
[slot
].base_gfn
+ memslots
[slot
].npages
)
1016 return &memslots
[slot
];
1018 while (start
< end
) {
1019 slot
= start
+ (end
- start
) / 2;
1021 if (gfn
>= memslots
[slot
].base_gfn
)
1027 if (gfn
>= memslots
[start
].base_gfn
&&
1028 gfn
< memslots
[start
].base_gfn
+ memslots
[start
].npages
) {
1029 atomic_set(&slots
->lru_slot
, start
);
1030 return &memslots
[start
];
1036 static inline struct kvm_memory_slot
*
1037 __gfn_to_memslot(struct kvm_memslots
*slots
, gfn_t gfn
)
1039 return search_memslots(slots
, gfn
);
1042 static inline unsigned long
1043 __gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
)
1045 return slot
->userspace_addr
+ (gfn
- slot
->base_gfn
) * PAGE_SIZE
;
1048 static inline int memslot_id(struct kvm
*kvm
, gfn_t gfn
)
1050 return gfn_to_memslot(kvm
, gfn
)->id
;
1054 hva_to_gfn_memslot(unsigned long hva
, struct kvm_memory_slot
*slot
)
1056 gfn_t gfn_offset
= (hva
- slot
->userspace_addr
) >> PAGE_SHIFT
;
1058 return slot
->base_gfn
+ gfn_offset
;
1061 static inline gpa_t
gfn_to_gpa(gfn_t gfn
)
1063 return (gpa_t
)gfn
<< PAGE_SHIFT
;
1066 static inline gfn_t
gpa_to_gfn(gpa_t gpa
)
1068 return (gfn_t
)(gpa
>> PAGE_SHIFT
);
1071 static inline hpa_t
pfn_to_hpa(kvm_pfn_t pfn
)
1073 return (hpa_t
)pfn
<< PAGE_SHIFT
;
1076 static inline struct page
*kvm_vcpu_gpa_to_page(struct kvm_vcpu
*vcpu
,
1079 return kvm_vcpu_gfn_to_page(vcpu
, gpa_to_gfn(gpa
));
1082 static inline bool kvm_is_error_gpa(struct kvm
*kvm
, gpa_t gpa
)
1084 unsigned long hva
= gfn_to_hva(kvm
, gpa_to_gfn(gpa
));
1086 return kvm_is_error_hva(hva
);
1089 enum kvm_stat_kind
{
1094 struct kvm_stat_data
{
1100 struct kvm_stats_debugfs_item
{
1103 enum kvm_stat_kind kind
;
1106 extern struct kvm_stats_debugfs_item debugfs_entries
[];
1107 extern struct dentry
*kvm_debugfs_dir
;
1109 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
1110 static inline int mmu_notifier_retry(struct kvm
*kvm
, unsigned long mmu_seq
)
1112 if (unlikely(kvm
->mmu_notifier_count
))
1115 * Ensure the read of mmu_notifier_count happens before the read
1116 * of mmu_notifier_seq. This interacts with the smp_wmb() in
1117 * mmu_notifier_invalidate_range_end to make sure that the caller
1118 * either sees the old (non-zero) value of mmu_notifier_count or
1119 * the new (incremented) value of mmu_notifier_seq.
1120 * PowerPC Book3s HV KVM calls this under a per-page lock
1121 * rather than under kvm->mmu_lock, for scalability, so
1122 * can't rely on kvm->mmu_lock to keep things ordered.
1125 if (kvm
->mmu_notifier_seq
!= mmu_seq
)
1131 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
1133 #define KVM_MAX_IRQ_ROUTES 4096 /* might need extension/rework in the future */
1135 bool kvm_arch_can_set_irq_routing(struct kvm
*kvm
);
1136 int kvm_set_irq_routing(struct kvm
*kvm
,
1137 const struct kvm_irq_routing_entry
*entries
,
1140 int kvm_set_routing_entry(struct kvm
*kvm
,
1141 struct kvm_kernel_irq_routing_entry
*e
,
1142 const struct kvm_irq_routing_entry
*ue
);
1143 void kvm_free_irq_routing(struct kvm
*kvm
);
1147 static inline void kvm_free_irq_routing(struct kvm
*kvm
) {}
1151 int kvm_send_userspace_msi(struct kvm
*kvm
, struct kvm_msi
*msi
);
1153 #ifdef CONFIG_HAVE_KVM_EVENTFD
1155 void kvm_eventfd_init(struct kvm
*kvm
);
1156 int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
);
1158 #ifdef CONFIG_HAVE_KVM_IRQFD
1159 int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
);
1160 void kvm_irqfd_release(struct kvm
*kvm
);
1161 void kvm_irq_routing_update(struct kvm
*);
1163 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
1168 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
1173 static inline void kvm_eventfd_init(struct kvm
*kvm
) {}
1175 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
1180 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
1182 #ifdef CONFIG_HAVE_KVM_IRQCHIP
1183 static inline void kvm_irq_routing_update(struct kvm
*kvm
)
1188 static inline int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
)
1193 #endif /* CONFIG_HAVE_KVM_EVENTFD */
1195 void kvm_arch_irq_routing_update(struct kvm
*kvm
);
1197 static inline void kvm_make_request(int req
, struct kvm_vcpu
*vcpu
)
1200 * Ensure the rest of the request is published to kvm_check_request's
1201 * caller. Paired with the smp_mb__after_atomic in kvm_check_request.
1204 set_bit(req
& KVM_REQUEST_MASK
, (void *)&vcpu
->requests
);
1207 static inline bool kvm_request_pending(struct kvm_vcpu
*vcpu
)
1209 return READ_ONCE(vcpu
->requests
);
1212 static inline bool kvm_test_request(int req
, struct kvm_vcpu
*vcpu
)
1214 return test_bit(req
& KVM_REQUEST_MASK
, (void *)&vcpu
->requests
);
1217 static inline void kvm_clear_request(int req
, struct kvm_vcpu
*vcpu
)
1219 clear_bit(req
& KVM_REQUEST_MASK
, (void *)&vcpu
->requests
);
1222 static inline bool kvm_check_request(int req
, struct kvm_vcpu
*vcpu
)
1224 if (kvm_test_request(req
, vcpu
)) {
1225 kvm_clear_request(req
, vcpu
);
1228 * Ensure the rest of the request is visible to kvm_check_request's
1229 * caller. Paired with the smp_wmb in kvm_make_request.
1231 smp_mb__after_atomic();
1238 extern bool kvm_rebooting
;
1240 extern unsigned int halt_poll_ns
;
1241 extern unsigned int halt_poll_ns_grow
;
1242 extern unsigned int halt_poll_ns_grow_start
;
1243 extern unsigned int halt_poll_ns_shrink
;
1246 struct kvm_device_ops
*ops
;
1249 struct list_head vm_node
;
1252 /* create, destroy, and name are mandatory */
1253 struct kvm_device_ops
{
1257 * create is called holding kvm->lock and any operations not suitable
1258 * to do while holding the lock should be deferred to init (see
1261 int (*create
)(struct kvm_device
*dev
, u32 type
);
1264 * init is called after create if create is successful and is called
1265 * outside of holding kvm->lock.
1267 void (*init
)(struct kvm_device
*dev
);
1270 * Destroy is responsible for freeing dev.
1272 * Destroy may be called before or after destructors are called
1273 * on emulated I/O regions, depending on whether a reference is
1274 * held by a vcpu or other kvm component that gets destroyed
1275 * after the emulated I/O.
1277 void (*destroy
)(struct kvm_device
*dev
);
1280 * Release is an alternative method to free the device. It is
1281 * called when the device file descriptor is closed. Once
1282 * release is called, the destroy method will not be called
1283 * anymore as the device is removed from the device list of
1284 * the VM. kvm->lock is held.
1286 void (*release
)(struct kvm_device
*dev
);
1288 int (*set_attr
)(struct kvm_device
*dev
, struct kvm_device_attr
*attr
);
1289 int (*get_attr
)(struct kvm_device
*dev
, struct kvm_device_attr
*attr
);
1290 int (*has_attr
)(struct kvm_device
*dev
, struct kvm_device_attr
*attr
);
1291 long (*ioctl
)(struct kvm_device
*dev
, unsigned int ioctl
,
1293 int (*mmap
)(struct kvm_device
*dev
, struct vm_area_struct
*vma
);
1296 void kvm_device_get(struct kvm_device
*dev
);
1297 void kvm_device_put(struct kvm_device
*dev
);
1298 struct kvm_device
*kvm_device_from_filp(struct file
*filp
);
1299 int kvm_register_device_ops(struct kvm_device_ops
*ops
, u32 type
);
1300 void kvm_unregister_device_ops(u32 type
);
1302 extern struct kvm_device_ops kvm_mpic_ops
;
1303 extern struct kvm_device_ops kvm_arm_vgic_v2_ops
;
1304 extern struct kvm_device_ops kvm_arm_vgic_v3_ops
;
1306 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1308 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
1310 vcpu
->spin_loop
.in_spin_loop
= val
;
1312 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
1314 vcpu
->spin_loop
.dy_eligible
= val
;
1317 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1319 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
1323 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
1326 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1328 #ifdef CONFIG_HAVE_KVM_IRQ_BYPASS
1329 bool kvm_arch_has_irq_bypass(void);
1330 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer
*,
1331 struct irq_bypass_producer
*);
1332 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer
*,
1333 struct irq_bypass_producer
*);
1334 void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer
*);
1335 void kvm_arch_irq_bypass_start(struct irq_bypass_consumer
*);
1336 int kvm_arch_update_irqfd_routing(struct kvm
*kvm
, unsigned int host_irq
,
1337 uint32_t guest_irq
, bool set
);
1338 #endif /* CONFIG_HAVE_KVM_IRQ_BYPASS */
1340 #ifdef CONFIG_HAVE_KVM_INVALID_WAKEUPS
1341 /* If we wakeup during the poll time, was it a sucessful poll? */
1342 static inline bool vcpu_valid_wakeup(struct kvm_vcpu
*vcpu
)
1344 return vcpu
->valid_wakeup
;
1348 static inline bool vcpu_valid_wakeup(struct kvm_vcpu
*vcpu
)
1352 #endif /* CONFIG_HAVE_KVM_INVALID_WAKEUPS */
1354 #ifdef CONFIG_HAVE_KVM_NO_POLL
1355 /* Callback that tells if we must not poll */
1356 bool kvm_arch_no_poll(struct kvm_vcpu
*vcpu
);
1358 static inline bool kvm_arch_no_poll(struct kvm_vcpu
*vcpu
)
1362 #endif /* CONFIG_HAVE_KVM_NO_POLL */
1364 #ifdef CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL
1365 long kvm_arch_vcpu_async_ioctl(struct file
*filp
,
1366 unsigned int ioctl
, unsigned long arg
);
1368 static inline long kvm_arch_vcpu_async_ioctl(struct file
*filp
,
1372 return -ENOIOCTLCMD
;
1374 #endif /* CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL */
1376 int kvm_arch_mmu_notifier_invalidate_range(struct kvm
*kvm
,
1377 unsigned long start
, unsigned long end
, bool blockable
);
1379 #ifdef CONFIG_HAVE_KVM_VCPU_RUN_PID_CHANGE
1380 int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu
*vcpu
);
1382 static inline int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu
*vcpu
)
1386 #endif /* CONFIG_HAVE_KVM_VCPU_RUN_PID_CHANGE */
1388 typedef int (*kvm_vm_thread_fn_t
)(struct kvm
*kvm
, uintptr_t data
);
1390 int kvm_vm_create_worker_thread(struct kvm
*kvm
, kvm_vm_thread_fn_t thread_fn
,
1391 uintptr_t data
, const char *name
,
1392 struct task_struct
**thread_ptr
);