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/sched/stat.h>
14 #include <linux/bug.h>
15 #include <linux/minmax.h>
17 #include <linux/mmu_notifier.h>
18 #include <linux/preempt.h>
19 #include <linux/msi.h>
20 #include <linux/slab.h>
21 #include <linux/vmalloc.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 <linux/irqbypass.h>
28 #include <linux/rcuwait.h>
29 #include <linux/refcount.h>
30 #include <linux/nospec.h>
31 #include <asm/signal.h>
33 #include <linux/kvm.h>
34 #include <linux/kvm_para.h>
36 #include <linux/kvm_types.h>
38 #include <asm/kvm_host.h>
39 #include <linux/kvm_dirty_ring.h>
41 #ifndef KVM_MAX_VCPU_ID
42 #define KVM_MAX_VCPU_ID KVM_MAX_VCPUS
46 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
47 * in kvm, other bits are visible for userspace which are defined in
48 * include/linux/kvm_h.
50 #define KVM_MEMSLOT_INVALID (1UL << 16)
53 * Bit 63 of the memslot generation number is an "update in-progress flag",
54 * e.g. is temporarily set for the duration of install_new_memslots().
55 * This flag effectively creates a unique generation number that is used to
56 * mark cached memslot data, e.g. MMIO accesses, as potentially being stale,
57 * i.e. may (or may not) have come from the previous memslots generation.
59 * This is necessary because the actual memslots update is not atomic with
60 * respect to the generation number update. Updating the generation number
61 * first would allow a vCPU to cache a spte from the old memslots using the
62 * new generation number, and updating the generation number after switching
63 * to the new memslots would allow cache hits using the old generation number
64 * to reference the defunct memslots.
66 * This mechanism is used to prevent getting hits in KVM's caches while a
67 * memslot update is in-progress, and to prevent cache hits *after* updating
68 * the actual generation number against accesses that were inserted into the
69 * cache *before* the memslots were updated.
71 #define KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS BIT_ULL(63)
73 /* Two fragments for cross MMIO pages. */
74 #define KVM_MAX_MMIO_FRAGMENTS 2
76 #ifndef KVM_ADDRESS_SPACE_NUM
77 #define KVM_ADDRESS_SPACE_NUM 1
81 * For the normal pfn, the highest 12 bits should be zero,
82 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
83 * mask bit 63 to indicate the noslot pfn.
85 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
86 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
87 #define KVM_PFN_NOSLOT (0x1ULL << 63)
89 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
90 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
91 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
94 * error pfns indicate that the gfn is in slot but faild to
95 * translate it to pfn on host.
97 static inline bool is_error_pfn(kvm_pfn_t pfn
)
99 return !!(pfn
& KVM_PFN_ERR_MASK
);
103 * error_noslot pfns indicate that the gfn can not be
104 * translated to pfn - it is not in slot or failed to
105 * translate it to pfn.
107 static inline bool is_error_noslot_pfn(kvm_pfn_t pfn
)
109 return !!(pfn
& KVM_PFN_ERR_NOSLOT_MASK
);
112 /* noslot pfn indicates that the gfn is not in slot. */
113 static inline bool is_noslot_pfn(kvm_pfn_t pfn
)
115 return pfn
== KVM_PFN_NOSLOT
;
119 * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390)
120 * provide own defines and kvm_is_error_hva
122 #ifndef KVM_HVA_ERR_BAD
124 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
125 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
127 static inline bool kvm_is_error_hva(unsigned long addr
)
129 return addr
>= PAGE_OFFSET
;
134 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
136 static inline bool is_error_page(struct page
*page
)
141 #define KVM_REQUEST_MASK GENMASK(7,0)
142 #define KVM_REQUEST_NO_WAKEUP BIT(8)
143 #define KVM_REQUEST_WAIT BIT(9)
145 * Architecture-independent vcpu->requests bit members
146 * Bits 4-7 are reserved for more arch-independent bits.
148 #define KVM_REQ_TLB_FLUSH (0 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
149 #define KVM_REQ_MMU_RELOAD (1 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
150 #define KVM_REQ_UNBLOCK 2
151 #define KVM_REQ_UNHALT 3
152 #define KVM_REQUEST_ARCH_BASE 8
154 #define KVM_ARCH_REQ_FLAGS(nr, flags) ({ \
155 BUILD_BUG_ON((unsigned)(nr) >= (sizeof_field(struct kvm_vcpu, requests) * 8) - KVM_REQUEST_ARCH_BASE); \
156 (unsigned)(((nr) + KVM_REQUEST_ARCH_BASE) | (flags)); \
158 #define KVM_ARCH_REQ(nr) KVM_ARCH_REQ_FLAGS(nr, 0)
160 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
161 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
163 extern struct mutex kvm_lock
;
164 extern struct list_head vm_list
;
166 struct kvm_io_range
{
169 struct kvm_io_device
*dev
;
172 #define NR_IOBUS_DEVS 1000
177 struct kvm_io_range range
[];
183 KVM_VIRTIO_CCW_NOTIFY_BUS
,
188 int kvm_io_bus_write(struct kvm_vcpu
*vcpu
, enum kvm_bus bus_idx
, gpa_t addr
,
189 int len
, const void *val
);
190 int kvm_io_bus_write_cookie(struct kvm_vcpu
*vcpu
, enum kvm_bus bus_idx
,
191 gpa_t addr
, int len
, const void *val
, long cookie
);
192 int kvm_io_bus_read(struct kvm_vcpu
*vcpu
, enum kvm_bus bus_idx
, gpa_t addr
,
194 int kvm_io_bus_register_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
195 int len
, struct kvm_io_device
*dev
);
196 int kvm_io_bus_unregister_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
,
197 struct kvm_io_device
*dev
);
198 struct kvm_io_device
*kvm_io_bus_get_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
,
201 #ifdef CONFIG_KVM_ASYNC_PF
202 struct kvm_async_pf
{
203 struct work_struct work
;
204 struct list_head link
;
205 struct list_head queue
;
206 struct kvm_vcpu
*vcpu
;
207 struct mm_struct
*mm
;
210 struct kvm_arch_async_pf arch
;
212 bool notpresent_injected
;
215 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu
*vcpu
);
216 void kvm_check_async_pf_completion(struct kvm_vcpu
*vcpu
);
217 bool kvm_setup_async_pf(struct kvm_vcpu
*vcpu
, gpa_t cr2_or_gpa
,
218 unsigned long hva
, struct kvm_arch_async_pf
*arch
);
219 int kvm_async_pf_wakeup_all(struct kvm_vcpu
*vcpu
);
222 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
223 struct kvm_gfn_range
{
224 struct kvm_memory_slot
*slot
;
230 bool kvm_unmap_gfn_range(struct kvm
*kvm
, struct kvm_gfn_range
*range
);
231 bool kvm_age_gfn(struct kvm
*kvm
, struct kvm_gfn_range
*range
);
232 bool kvm_test_age_gfn(struct kvm
*kvm
, struct kvm_gfn_range
*range
);
233 bool kvm_set_spte_gfn(struct kvm
*kvm
, struct kvm_gfn_range
*range
);
240 READING_SHADOW_PAGE_TABLES
,
243 #define KVM_UNMAPPED_PAGE ((void *) 0x500 + POISON_POINTER_DELTA)
245 struct kvm_host_map
{
247 * Only valid if the 'pfn' is managed by the host kernel (i.e. There is
248 * a 'struct page' for it. When using mem= kernel parameter some memory
249 * can be used as guest memory but they are not managed by host
251 * If 'pfn' is not managed by the host kernel, this field is
252 * initialized to KVM_UNMAPPED_PAGE.
261 * Used to check if the mapping is valid or not. Never use 'kvm_host_map'
262 * directly to check for that.
264 static inline bool kvm_vcpu_mapped(struct kvm_host_map
*map
)
269 static inline bool kvm_vcpu_can_poll(ktime_t cur
, ktime_t stop
)
271 return single_task_running() && !need_resched() && ktime_before(cur
, stop
);
275 * Sometimes a large or cross-page mmio needs to be broken up into separate
276 * exits for userspace servicing.
278 struct kvm_mmio_fragment
{
286 #ifdef CONFIG_PREEMPT_NOTIFIERS
287 struct preempt_notifier preempt_notifier
;
290 int vcpu_id
; /* id given by userspace at creation */
291 int vcpu_idx
; /* index in kvm->vcpus array */
295 unsigned long guest_debug
;
298 struct list_head blocked_vcpu_list
;
304 struct pid __rcu
*pid
;
307 struct kvm_vcpu_stat stat
;
308 unsigned int halt_poll_ns
;
311 #ifdef CONFIG_HAS_IOMEM
313 int mmio_read_completed
;
315 int mmio_cur_fragment
;
316 int mmio_nr_fragments
;
317 struct kvm_mmio_fragment mmio_fragments
[KVM_MAX_MMIO_FRAGMENTS
];
320 #ifdef CONFIG_KVM_ASYNC_PF
323 struct list_head queue
;
324 struct list_head done
;
329 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
331 * Cpu relax intercept or pause loop exit optimization
332 * in_spin_loop: set when a vcpu does a pause loop exit
333 * or cpu relax intercepted.
334 * dy_eligible: indicates whether vcpu is eligible for directed yield.
343 struct kvm_vcpu_arch arch
;
344 struct kvm_dirty_ring dirty_ring
;
347 /* must be called with irqs disabled */
348 static __always_inline
void guest_enter_irqoff(void)
351 * This is running in ioctl context so its safe to assume that it's the
352 * stime pending cputime to flush.
354 instrumentation_begin();
355 vtime_account_guest_enter();
356 instrumentation_end();
359 * KVM does not hold any references to rcu protected data when it
360 * switches CPU into a guest mode. In fact switching to a guest mode
361 * is very similar to exiting to userspace from rcu point of view. In
362 * addition CPU may stay in a guest mode for quite a long time (up to
363 * one time slice). Lets treat guest mode as quiescent state, just like
364 * we do with user-mode execution.
366 if (!context_tracking_guest_enter()) {
367 instrumentation_begin();
368 rcu_virt_note_context_switch(smp_processor_id());
369 instrumentation_end();
373 static __always_inline
void guest_exit_irqoff(void)
375 context_tracking_guest_exit();
377 instrumentation_begin();
378 /* Flush the guest cputime we spent on the guest */
379 vtime_account_guest_exit();
380 instrumentation_end();
383 static inline void guest_exit(void)
387 local_irq_save(flags
);
389 local_irq_restore(flags
);
392 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu
*vcpu
)
395 * The memory barrier ensures a previous write to vcpu->requests cannot
396 * be reordered with the read of vcpu->mode. It pairs with the general
397 * memory barrier following the write of vcpu->mode in VCPU RUN.
399 smp_mb__before_atomic();
400 return cmpxchg(&vcpu
->mode
, IN_GUEST_MODE
, EXITING_GUEST_MODE
);
404 * Some of the bitops functions do not support too long bitmaps.
405 * This number must be determined not to exceed such limits.
407 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
409 struct kvm_memory_slot
{
411 unsigned long npages
;
412 unsigned long *dirty_bitmap
;
413 struct kvm_arch_memory_slot arch
;
414 unsigned long userspace_addr
;
420 static inline bool kvm_slot_dirty_track_enabled(struct kvm_memory_slot
*slot
)
422 return slot
->flags
& KVM_MEM_LOG_DIRTY_PAGES
;
425 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot
*memslot
)
427 return ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
430 static inline unsigned long *kvm_second_dirty_bitmap(struct kvm_memory_slot
*memslot
)
432 unsigned long len
= kvm_dirty_bitmap_bytes(memslot
);
434 return memslot
->dirty_bitmap
+ len
/ sizeof(*memslot
->dirty_bitmap
);
437 #ifndef KVM_DIRTY_LOG_MANUAL_CAPS
438 #define KVM_DIRTY_LOG_MANUAL_CAPS KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE
441 struct kvm_s390_adapter_int
{
454 struct kvm_kernel_irq_routing_entry
{
457 int (*set
)(struct kvm_kernel_irq_routing_entry
*e
,
458 struct kvm
*kvm
, int irq_source_id
, int level
,
472 struct kvm_s390_adapter_int adapter
;
473 struct kvm_hv_sint hv_sint
;
475 struct hlist_node link
;
478 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
479 struct kvm_irq_routing_table
{
480 int chip
[KVM_NR_IRQCHIPS
][KVM_IRQCHIP_NUM_PINS
];
483 * Array indexed by gsi. Each entry contains list of irq chips
484 * the gsi is connected to.
486 struct hlist_head map
[];
490 #ifndef KVM_PRIVATE_MEM_SLOTS
491 #define KVM_PRIVATE_MEM_SLOTS 0
494 #define KVM_MEM_SLOTS_NUM SHRT_MAX
495 #define KVM_USER_MEM_SLOTS (KVM_MEM_SLOTS_NUM - KVM_PRIVATE_MEM_SLOTS)
497 #ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
498 static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu
*vcpu
)
506 * memslots are not sorted by id anymore, please use id_to_memslot()
507 * to get the memslot by its id.
509 struct kvm_memslots
{
511 /* The mapping table from slot id to the index in memslots[]. */
512 short id_to_index
[KVM_MEM_SLOTS_NUM
];
515 struct kvm_memory_slot memslots
[];
519 #ifdef KVM_HAVE_MMU_RWLOCK
523 #endif /* KVM_HAVE_MMU_RWLOCK */
525 struct mutex slots_lock
;
526 struct mm_struct
*mm
; /* userspace tied to this vm */
527 struct kvm_memslots __rcu
*memslots
[KVM_ADDRESS_SPACE_NUM
];
528 struct kvm_vcpu
*vcpus
[KVM_MAX_VCPUS
];
531 * created_vcpus is protected by kvm->lock, and is incremented
532 * at the beginning of KVM_CREATE_VCPU. online_vcpus is only
533 * incremented after storing the kvm_vcpu pointer in vcpus,
534 * and is accessed atomically.
536 atomic_t online_vcpus
;
538 int last_boosted_vcpu
;
539 struct list_head vm_list
;
541 struct kvm_io_bus __rcu
*buses
[KVM_NR_BUSES
];
542 #ifdef CONFIG_HAVE_KVM_EVENTFD
545 struct list_head items
;
546 struct list_head resampler_list
;
547 struct mutex resampler_lock
;
549 struct list_head ioeventfds
;
551 struct kvm_vm_stat stat
;
552 struct kvm_arch arch
;
553 refcount_t users_count
;
554 #ifdef CONFIG_KVM_MMIO
555 struct kvm_coalesced_mmio_ring
*coalesced_mmio_ring
;
556 spinlock_t ring_lock
;
557 struct list_head coalesced_zones
;
560 struct mutex irq_lock
;
561 #ifdef CONFIG_HAVE_KVM_IRQCHIP
563 * Update side is protected by irq_lock.
565 struct kvm_irq_routing_table __rcu
*irq_routing
;
567 #ifdef CONFIG_HAVE_KVM_IRQFD
568 struct hlist_head irq_ack_notifier_list
;
571 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
572 struct mmu_notifier mmu_notifier
;
573 unsigned long mmu_notifier_seq
;
574 long mmu_notifier_count
;
575 unsigned long mmu_notifier_range_start
;
576 unsigned long mmu_notifier_range_end
;
579 struct list_head devices
;
580 u64 manual_dirty_log_protect
;
581 struct dentry
*debugfs_dentry
;
582 struct kvm_stat_data
**debugfs_stat_data
;
583 struct srcu_struct srcu
;
584 struct srcu_struct irq_srcu
;
586 unsigned int max_halt_poll_ns
;
590 #define kvm_err(fmt, ...) \
591 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
592 #define kvm_info(fmt, ...) \
593 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
594 #define kvm_debug(fmt, ...) \
595 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
596 #define kvm_debug_ratelimited(fmt, ...) \
597 pr_debug_ratelimited("kvm [%i]: " fmt, task_pid_nr(current), \
599 #define kvm_pr_unimpl(fmt, ...) \
600 pr_err_ratelimited("kvm [%i]: " fmt, \
601 task_tgid_nr(current), ## __VA_ARGS__)
603 /* The guest did something we don't support. */
604 #define vcpu_unimpl(vcpu, fmt, ...) \
605 kvm_pr_unimpl("vcpu%i, guest rIP: 0x%lx " fmt, \
606 (vcpu)->vcpu_id, kvm_rip_read(vcpu), ## __VA_ARGS__)
608 #define vcpu_debug(vcpu, fmt, ...) \
609 kvm_debug("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
610 #define vcpu_debug_ratelimited(vcpu, fmt, ...) \
611 kvm_debug_ratelimited("vcpu%i " fmt, (vcpu)->vcpu_id, \
613 #define vcpu_err(vcpu, fmt, ...) \
614 kvm_err("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
616 static inline bool kvm_dirty_log_manual_protect_and_init_set(struct kvm
*kvm
)
618 return !!(kvm
->manual_dirty_log_protect
& KVM_DIRTY_LOG_INITIALLY_SET
);
621 static inline struct kvm_io_bus
*kvm_get_bus(struct kvm
*kvm
, enum kvm_bus idx
)
623 return srcu_dereference_check(kvm
->buses
[idx
], &kvm
->srcu
,
624 lockdep_is_held(&kvm
->slots_lock
) ||
625 !refcount_read(&kvm
->users_count
));
628 static inline struct kvm_vcpu
*kvm_get_vcpu(struct kvm
*kvm
, int i
)
630 int num_vcpus
= atomic_read(&kvm
->online_vcpus
);
631 i
= array_index_nospec(i
, num_vcpus
);
633 /* Pairs with smp_wmb() in kvm_vm_ioctl_create_vcpu. */
635 return kvm
->vcpus
[i
];
638 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
640 idx < atomic_read(&kvm->online_vcpus) && \
641 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
644 static inline struct kvm_vcpu
*kvm_get_vcpu_by_id(struct kvm
*kvm
, int id
)
646 struct kvm_vcpu
*vcpu
= NULL
;
651 if (id
< KVM_MAX_VCPUS
)
652 vcpu
= kvm_get_vcpu(kvm
, id
);
653 if (vcpu
&& vcpu
->vcpu_id
== id
)
655 kvm_for_each_vcpu(i
, vcpu
, kvm
)
656 if (vcpu
->vcpu_id
== id
)
661 static inline int kvm_vcpu_get_idx(struct kvm_vcpu
*vcpu
)
663 return vcpu
->vcpu_idx
;
666 #define kvm_for_each_memslot(memslot, slots) \
667 for (memslot = &slots->memslots[0]; \
668 memslot < slots->memslots + slots->used_slots; memslot++) \
669 if (WARN_ON_ONCE(!memslot->npages)) { \
672 void kvm_vcpu_destroy(struct kvm_vcpu
*vcpu
);
674 void vcpu_load(struct kvm_vcpu
*vcpu
);
675 void vcpu_put(struct kvm_vcpu
*vcpu
);
677 #ifdef __KVM_HAVE_IOAPIC
678 void kvm_arch_post_irq_ack_notifier_list_update(struct kvm
*kvm
);
679 void kvm_arch_post_irq_routing_update(struct kvm
*kvm
);
681 static inline void kvm_arch_post_irq_ack_notifier_list_update(struct kvm
*kvm
)
684 static inline void kvm_arch_post_irq_routing_update(struct kvm
*kvm
)
689 #ifdef CONFIG_HAVE_KVM_IRQFD
690 int kvm_irqfd_init(void);
691 void kvm_irqfd_exit(void);
693 static inline int kvm_irqfd_init(void)
698 static inline void kvm_irqfd_exit(void)
702 int kvm_init(void *opaque
, unsigned vcpu_size
, unsigned vcpu_align
,
703 struct module
*module
);
706 void kvm_get_kvm(struct kvm
*kvm
);
707 void kvm_put_kvm(struct kvm
*kvm
);
708 bool file_is_kvm(struct file
*file
);
709 void kvm_put_kvm_no_destroy(struct kvm
*kvm
);
711 static inline struct kvm_memslots
*__kvm_memslots(struct kvm
*kvm
, int as_id
)
713 as_id
= array_index_nospec(as_id
, KVM_ADDRESS_SPACE_NUM
);
714 return srcu_dereference_check(kvm
->memslots
[as_id
], &kvm
->srcu
,
715 lockdep_is_held(&kvm
->slots_lock
) ||
716 !refcount_read(&kvm
->users_count
));
719 static inline struct kvm_memslots
*kvm_memslots(struct kvm
*kvm
)
721 return __kvm_memslots(kvm
, 0);
724 static inline struct kvm_memslots
*kvm_vcpu_memslots(struct kvm_vcpu
*vcpu
)
726 int as_id
= kvm_arch_vcpu_memslots_id(vcpu
);
728 return __kvm_memslots(vcpu
->kvm
, as_id
);
732 struct kvm_memory_slot
*id_to_memslot(struct kvm_memslots
*slots
, int id
)
734 int index
= slots
->id_to_index
[id
];
735 struct kvm_memory_slot
*slot
;
740 slot
= &slots
->memslots
[index
];
742 WARN_ON(slot
->id
!= id
);
747 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
748 * - create a new memory slot
749 * - delete an existing memory slot
750 * - modify an existing memory slot
751 * -- move it in the guest physical memory space
752 * -- just change its flags
754 * Since flags can be changed by some of these operations, the following
755 * differentiation is the best we can do for __kvm_set_memory_region():
764 int kvm_set_memory_region(struct kvm
*kvm
,
765 const struct kvm_userspace_memory_region
*mem
);
766 int __kvm_set_memory_region(struct kvm
*kvm
,
767 const struct kvm_userspace_memory_region
*mem
);
768 void kvm_arch_free_memslot(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
769 void kvm_arch_memslots_updated(struct kvm
*kvm
, u64 gen
);
770 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
771 struct kvm_memory_slot
*memslot
,
772 const struct kvm_userspace_memory_region
*mem
,
773 enum kvm_mr_change change
);
774 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
775 const struct kvm_userspace_memory_region
*mem
,
776 struct kvm_memory_slot
*old
,
777 const struct kvm_memory_slot
*new,
778 enum kvm_mr_change change
);
779 /* flush all memory translations */
780 void kvm_arch_flush_shadow_all(struct kvm
*kvm
);
781 /* flush memory translations pointing to 'slot' */
782 void kvm_arch_flush_shadow_memslot(struct kvm
*kvm
,
783 struct kvm_memory_slot
*slot
);
785 int gfn_to_page_many_atomic(struct kvm_memory_slot
*slot
, gfn_t gfn
,
786 struct page
**pages
, int nr_pages
);
788 struct page
*gfn_to_page(struct kvm
*kvm
, gfn_t gfn
);
789 unsigned long gfn_to_hva(struct kvm
*kvm
, gfn_t gfn
);
790 unsigned long gfn_to_hva_prot(struct kvm
*kvm
, gfn_t gfn
, bool *writable
);
791 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
792 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot
*slot
, gfn_t gfn
,
794 void kvm_release_page_clean(struct page
*page
);
795 void kvm_release_page_dirty(struct page
*page
);
796 void kvm_set_page_accessed(struct page
*page
);
798 kvm_pfn_t
gfn_to_pfn(struct kvm
*kvm
, gfn_t gfn
);
799 kvm_pfn_t
gfn_to_pfn_prot(struct kvm
*kvm
, gfn_t gfn
, bool write_fault
,
801 kvm_pfn_t
gfn_to_pfn_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
802 kvm_pfn_t
gfn_to_pfn_memslot_atomic(struct kvm_memory_slot
*slot
, gfn_t gfn
);
803 kvm_pfn_t
__gfn_to_pfn_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
,
804 bool atomic
, bool *async
, bool write_fault
,
805 bool *writable
, hva_t
*hva
);
807 void kvm_release_pfn_clean(kvm_pfn_t pfn
);
808 void kvm_release_pfn_dirty(kvm_pfn_t pfn
);
809 void kvm_set_pfn_dirty(kvm_pfn_t pfn
);
810 void kvm_set_pfn_accessed(kvm_pfn_t pfn
);
811 void kvm_get_pfn(kvm_pfn_t pfn
);
813 void kvm_release_pfn(kvm_pfn_t pfn
, bool dirty
, struct gfn_to_pfn_cache
*cache
);
814 int kvm_read_guest_page(struct kvm
*kvm
, gfn_t gfn
, void *data
, int offset
,
816 int kvm_read_guest(struct kvm
*kvm
, gpa_t gpa
, void *data
, unsigned long len
);
817 int kvm_read_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
818 void *data
, unsigned long len
);
819 int kvm_read_guest_offset_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
820 void *data
, unsigned int offset
,
822 int kvm_write_guest_page(struct kvm
*kvm
, gfn_t gfn
, const void *data
,
823 int offset
, int len
);
824 int kvm_write_guest(struct kvm
*kvm
, gpa_t gpa
, const void *data
,
826 int kvm_write_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
827 void *data
, unsigned long len
);
828 int kvm_write_guest_offset_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
829 void *data
, unsigned int offset
,
831 int kvm_gfn_to_hva_cache_init(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
832 gpa_t gpa
, unsigned long len
);
834 #define __kvm_get_guest(kvm, gfn, offset, v) \
836 unsigned long __addr = gfn_to_hva(kvm, gfn); \
837 typeof(v) __user *__uaddr = (typeof(__uaddr))(__addr + offset); \
838 int __ret = -EFAULT; \
840 if (!kvm_is_error_hva(__addr)) \
841 __ret = get_user(v, __uaddr); \
845 #define kvm_get_guest(kvm, gpa, v) \
848 struct kvm *__kvm = kvm; \
850 __kvm_get_guest(__kvm, __gpa >> PAGE_SHIFT, \
851 offset_in_page(__gpa), v); \
854 #define __kvm_put_guest(kvm, gfn, offset, v) \
856 unsigned long __addr = gfn_to_hva(kvm, gfn); \
857 typeof(v) __user *__uaddr = (typeof(__uaddr))(__addr + offset); \
858 int __ret = -EFAULT; \
860 if (!kvm_is_error_hva(__addr)) \
861 __ret = put_user(v, __uaddr); \
863 mark_page_dirty(kvm, gfn); \
867 #define kvm_put_guest(kvm, gpa, v) \
870 struct kvm *__kvm = kvm; \
872 __kvm_put_guest(__kvm, __gpa >> PAGE_SHIFT, \
873 offset_in_page(__gpa), v); \
876 int kvm_clear_guest(struct kvm
*kvm
, gpa_t gpa
, unsigned long len
);
877 struct kvm_memory_slot
*gfn_to_memslot(struct kvm
*kvm
, gfn_t gfn
);
878 bool kvm_is_visible_gfn(struct kvm
*kvm
, gfn_t gfn
);
879 bool kvm_vcpu_is_visible_gfn(struct kvm_vcpu
*vcpu
, gfn_t gfn
);
880 unsigned long kvm_host_page_size(struct kvm_vcpu
*vcpu
, gfn_t gfn
);
881 void mark_page_dirty_in_slot(struct kvm
*kvm
, struct kvm_memory_slot
*memslot
, gfn_t gfn
);
882 void mark_page_dirty(struct kvm
*kvm
, gfn_t gfn
);
884 struct kvm_memslots
*kvm_vcpu_memslots(struct kvm_vcpu
*vcpu
);
885 struct kvm_memory_slot
*kvm_vcpu_gfn_to_memslot(struct kvm_vcpu
*vcpu
, gfn_t gfn
);
886 kvm_pfn_t
kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu
*vcpu
, gfn_t gfn
);
887 kvm_pfn_t
kvm_vcpu_gfn_to_pfn(struct kvm_vcpu
*vcpu
, gfn_t gfn
);
888 int kvm_vcpu_map(struct kvm_vcpu
*vcpu
, gpa_t gpa
, struct kvm_host_map
*map
);
889 int kvm_map_gfn(struct kvm_vcpu
*vcpu
, gfn_t gfn
, struct kvm_host_map
*map
,
890 struct gfn_to_pfn_cache
*cache
, bool atomic
);
891 struct page
*kvm_vcpu_gfn_to_page(struct kvm_vcpu
*vcpu
, gfn_t gfn
);
892 void kvm_vcpu_unmap(struct kvm_vcpu
*vcpu
, struct kvm_host_map
*map
, bool dirty
);
893 int kvm_unmap_gfn(struct kvm_vcpu
*vcpu
, struct kvm_host_map
*map
,
894 struct gfn_to_pfn_cache
*cache
, bool dirty
, bool atomic
);
895 unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu
*vcpu
, gfn_t gfn
);
896 unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu
*vcpu
, gfn_t gfn
, bool *writable
);
897 int kvm_vcpu_read_guest_page(struct kvm_vcpu
*vcpu
, gfn_t gfn
, void *data
, int offset
,
899 int kvm_vcpu_read_guest_atomic(struct kvm_vcpu
*vcpu
, gpa_t gpa
, void *data
,
901 int kvm_vcpu_read_guest(struct kvm_vcpu
*vcpu
, gpa_t gpa
, void *data
,
903 int kvm_vcpu_write_guest_page(struct kvm_vcpu
*vcpu
, gfn_t gfn
, const void *data
,
904 int offset
, int len
);
905 int kvm_vcpu_write_guest(struct kvm_vcpu
*vcpu
, gpa_t gpa
, const void *data
,
907 void kvm_vcpu_mark_page_dirty(struct kvm_vcpu
*vcpu
, gfn_t gfn
);
909 void kvm_sigset_activate(struct kvm_vcpu
*vcpu
);
910 void kvm_sigset_deactivate(struct kvm_vcpu
*vcpu
);
912 void kvm_vcpu_block(struct kvm_vcpu
*vcpu
);
913 void kvm_arch_vcpu_blocking(struct kvm_vcpu
*vcpu
);
914 void kvm_arch_vcpu_unblocking(struct kvm_vcpu
*vcpu
);
915 bool kvm_vcpu_wake_up(struct kvm_vcpu
*vcpu
);
916 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
917 int kvm_vcpu_yield_to(struct kvm_vcpu
*target
);
918 void kvm_vcpu_on_spin(struct kvm_vcpu
*vcpu
, bool usermode_vcpu_not_eligible
);
920 void kvm_flush_remote_tlbs(struct kvm
*kvm
);
921 void kvm_reload_remote_mmus(struct kvm
*kvm
);
923 #ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE
924 int kvm_mmu_topup_memory_cache(struct kvm_mmu_memory_cache
*mc
, int min
);
925 int kvm_mmu_memory_cache_nr_free_objects(struct kvm_mmu_memory_cache
*mc
);
926 void kvm_mmu_free_memory_cache(struct kvm_mmu_memory_cache
*mc
);
927 void *kvm_mmu_memory_cache_alloc(struct kvm_mmu_memory_cache
*mc
);
930 bool kvm_make_vcpus_request_mask(struct kvm
*kvm
, unsigned int req
,
931 struct kvm_vcpu
*except
,
932 unsigned long *vcpu_bitmap
, cpumask_var_t tmp
);
933 bool kvm_make_all_cpus_request(struct kvm
*kvm
, unsigned int req
);
934 bool kvm_make_all_cpus_request_except(struct kvm
*kvm
, unsigned int req
,
935 struct kvm_vcpu
*except
);
936 bool kvm_make_cpus_request_mask(struct kvm
*kvm
, unsigned int req
,
937 unsigned long *vcpu_bitmap
);
939 long kvm_arch_dev_ioctl(struct file
*filp
,
940 unsigned int ioctl
, unsigned long arg
);
941 long kvm_arch_vcpu_ioctl(struct file
*filp
,
942 unsigned int ioctl
, unsigned long arg
);
943 vm_fault_t
kvm_arch_vcpu_fault(struct kvm_vcpu
*vcpu
, struct vm_fault
*vmf
);
945 int kvm_vm_ioctl_check_extension(struct kvm
*kvm
, long ext
);
947 void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm
*kvm
,
948 struct kvm_memory_slot
*slot
,
951 void kvm_arch_sync_dirty_log(struct kvm
*kvm
, struct kvm_memory_slot
*memslot
);
953 #ifdef CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT
954 void kvm_arch_flush_remote_tlbs_memslot(struct kvm
*kvm
,
955 const struct kvm_memory_slot
*memslot
);
956 #else /* !CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT */
957 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
, struct kvm_dirty_log
*log
);
958 int kvm_get_dirty_log(struct kvm
*kvm
, struct kvm_dirty_log
*log
,
959 int *is_dirty
, struct kvm_memory_slot
**memslot
);
962 int kvm_vm_ioctl_irq_line(struct kvm
*kvm
, struct kvm_irq_level
*irq_level
,
964 int kvm_vm_ioctl_enable_cap(struct kvm
*kvm
,
965 struct kvm_enable_cap
*cap
);
966 long kvm_arch_vm_ioctl(struct file
*filp
,
967 unsigned int ioctl
, unsigned long arg
);
969 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
970 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
972 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
973 struct kvm_translation
*tr
);
975 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
976 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
977 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
978 struct kvm_sregs
*sregs
);
979 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
980 struct kvm_sregs
*sregs
);
981 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
982 struct kvm_mp_state
*mp_state
);
983 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
984 struct kvm_mp_state
*mp_state
);
985 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
986 struct kvm_guest_debug
*dbg
);
987 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
);
989 int kvm_arch_init(void *opaque
);
990 void kvm_arch_exit(void);
992 void kvm_arch_sched_in(struct kvm_vcpu
*vcpu
, int cpu
);
994 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
);
995 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
);
996 int kvm_arch_vcpu_precreate(struct kvm
*kvm
, unsigned int id
);
997 int kvm_arch_vcpu_create(struct kvm_vcpu
*vcpu
);
998 void kvm_arch_vcpu_postcreate(struct kvm_vcpu
*vcpu
);
999 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
);
1001 #ifdef __KVM_HAVE_ARCH_VCPU_DEBUGFS
1002 void kvm_arch_create_vcpu_debugfs(struct kvm_vcpu
*vcpu
, struct dentry
*debugfs_dentry
);
1005 int kvm_arch_hardware_enable(void);
1006 void kvm_arch_hardware_disable(void);
1007 int kvm_arch_hardware_setup(void *opaque
);
1008 void kvm_arch_hardware_unsetup(void);
1009 int kvm_arch_check_processor_compat(void *opaque
);
1010 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
);
1011 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu
*vcpu
);
1012 int kvm_arch_vcpu_should_kick(struct kvm_vcpu
*vcpu
);
1013 bool kvm_arch_dy_runnable(struct kvm_vcpu
*vcpu
);
1014 bool kvm_arch_dy_has_pending_interrupt(struct kvm_vcpu
*vcpu
);
1015 int kvm_arch_post_init_vm(struct kvm
*kvm
);
1016 void kvm_arch_pre_destroy_vm(struct kvm
*kvm
);
1018 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
1020 * All architectures that want to use vzalloc currently also
1021 * need their own kvm_arch_alloc_vm implementation.
1023 static inline struct kvm
*kvm_arch_alloc_vm(void)
1025 return kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
1028 static inline void kvm_arch_free_vm(struct kvm
*kvm
)
1034 #ifndef __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB
1035 static inline int kvm_arch_flush_remote_tlb(struct kvm
*kvm
)
1041 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
1042 void kvm_arch_register_noncoherent_dma(struct kvm
*kvm
);
1043 void kvm_arch_unregister_noncoherent_dma(struct kvm
*kvm
);
1044 bool kvm_arch_has_noncoherent_dma(struct kvm
*kvm
);
1046 static inline void kvm_arch_register_noncoherent_dma(struct kvm
*kvm
)
1050 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm
*kvm
)
1054 static inline bool kvm_arch_has_noncoherent_dma(struct kvm
*kvm
)
1059 #ifdef __KVM_HAVE_ARCH_ASSIGNED_DEVICE
1060 void kvm_arch_start_assignment(struct kvm
*kvm
);
1061 void kvm_arch_end_assignment(struct kvm
*kvm
);
1062 bool kvm_arch_has_assigned_device(struct kvm
*kvm
);
1064 static inline void kvm_arch_start_assignment(struct kvm
*kvm
)
1068 static inline void kvm_arch_end_assignment(struct kvm
*kvm
)
1072 static inline bool kvm_arch_has_assigned_device(struct kvm
*kvm
)
1078 static inline struct rcuwait
*kvm_arch_vcpu_get_wait(struct kvm_vcpu
*vcpu
)
1080 #ifdef __KVM_HAVE_ARCH_WQP
1081 return vcpu
->arch
.waitp
;
1087 #ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
1089 * returns true if the virtual interrupt controller is initialized and
1090 * ready to accept virtual IRQ. On some architectures the virtual interrupt
1091 * controller is dynamically instantiated and this is not always true.
1093 bool kvm_arch_intc_initialized(struct kvm
*kvm
);
1095 static inline bool kvm_arch_intc_initialized(struct kvm
*kvm
)
1101 int kvm_arch_init_vm(struct kvm
*kvm
, unsigned long type
);
1102 void kvm_arch_destroy_vm(struct kvm
*kvm
);
1103 void kvm_arch_sync_events(struct kvm
*kvm
);
1105 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
);
1107 bool kvm_is_reserved_pfn(kvm_pfn_t pfn
);
1108 bool kvm_is_zone_device_pfn(kvm_pfn_t pfn
);
1109 bool kvm_is_transparent_hugepage(kvm_pfn_t pfn
);
1111 struct kvm_irq_ack_notifier
{
1112 struct hlist_node link
;
1114 void (*irq_acked
)(struct kvm_irq_ack_notifier
*kian
);
1117 int kvm_irq_map_gsi(struct kvm
*kvm
,
1118 struct kvm_kernel_irq_routing_entry
*entries
, int gsi
);
1119 int kvm_irq_map_chip_pin(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
1121 int kvm_set_irq(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
,
1123 int kvm_set_msi(struct kvm_kernel_irq_routing_entry
*irq_entry
, struct kvm
*kvm
,
1124 int irq_source_id
, int level
, bool line_status
);
1125 int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry
*e
,
1126 struct kvm
*kvm
, int irq_source_id
,
1127 int level
, bool line_status
);
1128 bool kvm_irq_has_notifier(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
1129 void kvm_notify_acked_gsi(struct kvm
*kvm
, int gsi
);
1130 void kvm_notify_acked_irq(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
1131 void kvm_register_irq_ack_notifier(struct kvm
*kvm
,
1132 struct kvm_irq_ack_notifier
*kian
);
1133 void kvm_unregister_irq_ack_notifier(struct kvm
*kvm
,
1134 struct kvm_irq_ack_notifier
*kian
);
1135 int kvm_request_irq_source_id(struct kvm
*kvm
);
1136 void kvm_free_irq_source_id(struct kvm
*kvm
, int irq_source_id
);
1137 bool kvm_arch_irqfd_allowed(struct kvm
*kvm
, struct kvm_irqfd
*args
);
1140 * search_memslots() and __gfn_to_memslot() are here because they are
1141 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
1142 * gfn_to_memslot() itself isn't here as an inline because that would
1143 * bloat other code too much.
1145 * IMPORTANT: Slots are sorted from highest GFN to lowest GFN!
1147 static inline struct kvm_memory_slot
*
1148 search_memslots(struct kvm_memslots
*slots
, gfn_t gfn
)
1150 int start
= 0, end
= slots
->used_slots
;
1151 int slot
= atomic_read(&slots
->lru_slot
);
1152 struct kvm_memory_slot
*memslots
= slots
->memslots
;
1154 if (unlikely(!slots
->used_slots
))
1157 if (gfn
>= memslots
[slot
].base_gfn
&&
1158 gfn
< memslots
[slot
].base_gfn
+ memslots
[slot
].npages
)
1159 return &memslots
[slot
];
1161 while (start
< end
) {
1162 slot
= start
+ (end
- start
) / 2;
1164 if (gfn
>= memslots
[slot
].base_gfn
)
1170 if (start
< slots
->used_slots
&& gfn
>= memslots
[start
].base_gfn
&&
1171 gfn
< memslots
[start
].base_gfn
+ memslots
[start
].npages
) {
1172 atomic_set(&slots
->lru_slot
, start
);
1173 return &memslots
[start
];
1179 static inline struct kvm_memory_slot
*
1180 __gfn_to_memslot(struct kvm_memslots
*slots
, gfn_t gfn
)
1182 return search_memslots(slots
, gfn
);
1185 static inline unsigned long
1186 __gfn_to_hva_memslot(const struct kvm_memory_slot
*slot
, gfn_t gfn
)
1189 * The index was checked originally in search_memslots. To avoid
1190 * that a malicious guest builds a Spectre gadget out of e.g. page
1191 * table walks, do not let the processor speculate loads outside
1192 * the guest's registered memslots.
1194 unsigned long offset
= gfn
- slot
->base_gfn
;
1195 offset
= array_index_nospec(offset
, slot
->npages
);
1196 return slot
->userspace_addr
+ offset
* PAGE_SIZE
;
1199 static inline int memslot_id(struct kvm
*kvm
, gfn_t gfn
)
1201 return gfn_to_memslot(kvm
, gfn
)->id
;
1205 hva_to_gfn_memslot(unsigned long hva
, struct kvm_memory_slot
*slot
)
1207 gfn_t gfn_offset
= (hva
- slot
->userspace_addr
) >> PAGE_SHIFT
;
1209 return slot
->base_gfn
+ gfn_offset
;
1212 static inline gpa_t
gfn_to_gpa(gfn_t gfn
)
1214 return (gpa_t
)gfn
<< PAGE_SHIFT
;
1217 static inline gfn_t
gpa_to_gfn(gpa_t gpa
)
1219 return (gfn_t
)(gpa
>> PAGE_SHIFT
);
1222 static inline hpa_t
pfn_to_hpa(kvm_pfn_t pfn
)
1224 return (hpa_t
)pfn
<< PAGE_SHIFT
;
1227 static inline struct page
*kvm_vcpu_gpa_to_page(struct kvm_vcpu
*vcpu
,
1230 return kvm_vcpu_gfn_to_page(vcpu
, gpa_to_gfn(gpa
));
1233 static inline bool kvm_is_error_gpa(struct kvm
*kvm
, gpa_t gpa
)
1235 unsigned long hva
= gfn_to_hva(kvm
, gpa_to_gfn(gpa
));
1237 return kvm_is_error_hva(hva
);
1240 enum kvm_stat_kind
{
1245 struct kvm_stat_data
{
1247 struct kvm_stats_debugfs_item
*dbgfs_item
;
1250 struct kvm_stats_debugfs_item
{
1253 enum kvm_stat_kind kind
;
1257 #define KVM_DBGFS_GET_MODE(dbgfs_item) \
1258 ((dbgfs_item)->mode ? (dbgfs_item)->mode : 0644)
1260 #define VM_STAT(n, x, ...) \
1261 { n, offsetof(struct kvm, stat.x), KVM_STAT_VM, ## __VA_ARGS__ }
1262 #define VCPU_STAT(n, x, ...) \
1263 { n, offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU, ## __VA_ARGS__ }
1265 extern struct kvm_stats_debugfs_item debugfs_entries
[];
1266 extern struct dentry
*kvm_debugfs_dir
;
1268 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
1269 static inline int mmu_notifier_retry(struct kvm
*kvm
, unsigned long mmu_seq
)
1271 if (unlikely(kvm
->mmu_notifier_count
))
1274 * Ensure the read of mmu_notifier_count happens before the read
1275 * of mmu_notifier_seq. This interacts with the smp_wmb() in
1276 * mmu_notifier_invalidate_range_end to make sure that the caller
1277 * either sees the old (non-zero) value of mmu_notifier_count or
1278 * the new (incremented) value of mmu_notifier_seq.
1279 * PowerPC Book3s HV KVM calls this under a per-page lock
1280 * rather than under kvm->mmu_lock, for scalability, so
1281 * can't rely on kvm->mmu_lock to keep things ordered.
1284 if (kvm
->mmu_notifier_seq
!= mmu_seq
)
1289 static inline int mmu_notifier_retry_hva(struct kvm
*kvm
,
1290 unsigned long mmu_seq
,
1293 lockdep_assert_held(&kvm
->mmu_lock
);
1295 * If mmu_notifier_count is non-zero, then the range maintained by
1296 * kvm_mmu_notifier_invalidate_range_start contains all addresses that
1297 * might be being invalidated. Note that it may include some false
1298 * positives, due to shortcuts when handing concurrent invalidations.
1300 if (unlikely(kvm
->mmu_notifier_count
) &&
1301 hva
>= kvm
->mmu_notifier_range_start
&&
1302 hva
< kvm
->mmu_notifier_range_end
)
1304 if (kvm
->mmu_notifier_seq
!= mmu_seq
)
1310 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
1312 #define KVM_MAX_IRQ_ROUTES 4096 /* might need extension/rework in the future */
1314 bool kvm_arch_can_set_irq_routing(struct kvm
*kvm
);
1315 int kvm_set_irq_routing(struct kvm
*kvm
,
1316 const struct kvm_irq_routing_entry
*entries
,
1319 int kvm_set_routing_entry(struct kvm
*kvm
,
1320 struct kvm_kernel_irq_routing_entry
*e
,
1321 const struct kvm_irq_routing_entry
*ue
);
1322 void kvm_free_irq_routing(struct kvm
*kvm
);
1326 static inline void kvm_free_irq_routing(struct kvm
*kvm
) {}
1330 int kvm_send_userspace_msi(struct kvm
*kvm
, struct kvm_msi
*msi
);
1332 #ifdef CONFIG_HAVE_KVM_EVENTFD
1334 void kvm_eventfd_init(struct kvm
*kvm
);
1335 int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
);
1337 #ifdef CONFIG_HAVE_KVM_IRQFD
1338 int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
);
1339 void kvm_irqfd_release(struct kvm
*kvm
);
1340 void kvm_irq_routing_update(struct kvm
*);
1342 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
1347 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
1352 static inline void kvm_eventfd_init(struct kvm
*kvm
) {}
1354 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
1359 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
1361 #ifdef CONFIG_HAVE_KVM_IRQCHIP
1362 static inline void kvm_irq_routing_update(struct kvm
*kvm
)
1367 static inline int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
)
1372 #endif /* CONFIG_HAVE_KVM_EVENTFD */
1374 void kvm_arch_irq_routing_update(struct kvm
*kvm
);
1376 static inline void kvm_make_request(int req
, struct kvm_vcpu
*vcpu
)
1379 * Ensure the rest of the request is published to kvm_check_request's
1380 * caller. Paired with the smp_mb__after_atomic in kvm_check_request.
1383 set_bit(req
& KVM_REQUEST_MASK
, (void *)&vcpu
->requests
);
1386 static inline bool kvm_request_pending(struct kvm_vcpu
*vcpu
)
1388 return READ_ONCE(vcpu
->requests
);
1391 static inline bool kvm_test_request(int req
, struct kvm_vcpu
*vcpu
)
1393 return test_bit(req
& KVM_REQUEST_MASK
, (void *)&vcpu
->requests
);
1396 static inline void kvm_clear_request(int req
, struct kvm_vcpu
*vcpu
)
1398 clear_bit(req
& KVM_REQUEST_MASK
, (void *)&vcpu
->requests
);
1401 static inline bool kvm_check_request(int req
, struct kvm_vcpu
*vcpu
)
1403 if (kvm_test_request(req
, vcpu
)) {
1404 kvm_clear_request(req
, vcpu
);
1407 * Ensure the rest of the request is visible to kvm_check_request's
1408 * caller. Paired with the smp_wmb in kvm_make_request.
1410 smp_mb__after_atomic();
1417 extern bool kvm_rebooting
;
1419 extern unsigned int halt_poll_ns
;
1420 extern unsigned int halt_poll_ns_grow
;
1421 extern unsigned int halt_poll_ns_grow_start
;
1422 extern unsigned int halt_poll_ns_shrink
;
1425 const struct kvm_device_ops
*ops
;
1428 struct list_head vm_node
;
1431 /* create, destroy, and name are mandatory */
1432 struct kvm_device_ops
{
1436 * create is called holding kvm->lock and any operations not suitable
1437 * to do while holding the lock should be deferred to init (see
1440 int (*create
)(struct kvm_device
*dev
, u32 type
);
1443 * init is called after create if create is successful and is called
1444 * outside of holding kvm->lock.
1446 void (*init
)(struct kvm_device
*dev
);
1449 * Destroy is responsible for freeing dev.
1451 * Destroy may be called before or after destructors are called
1452 * on emulated I/O regions, depending on whether a reference is
1453 * held by a vcpu or other kvm component that gets destroyed
1454 * after the emulated I/O.
1456 void (*destroy
)(struct kvm_device
*dev
);
1459 * Release is an alternative method to free the device. It is
1460 * called when the device file descriptor is closed. Once
1461 * release is called, the destroy method will not be called
1462 * anymore as the device is removed from the device list of
1463 * the VM. kvm->lock is held.
1465 void (*release
)(struct kvm_device
*dev
);
1467 int (*set_attr
)(struct kvm_device
*dev
, struct kvm_device_attr
*attr
);
1468 int (*get_attr
)(struct kvm_device
*dev
, struct kvm_device_attr
*attr
);
1469 int (*has_attr
)(struct kvm_device
*dev
, struct kvm_device_attr
*attr
);
1470 long (*ioctl
)(struct kvm_device
*dev
, unsigned int ioctl
,
1472 int (*mmap
)(struct kvm_device
*dev
, struct vm_area_struct
*vma
);
1475 void kvm_device_get(struct kvm_device
*dev
);
1476 void kvm_device_put(struct kvm_device
*dev
);
1477 struct kvm_device
*kvm_device_from_filp(struct file
*filp
);
1478 int kvm_register_device_ops(const struct kvm_device_ops
*ops
, u32 type
);
1479 void kvm_unregister_device_ops(u32 type
);
1481 extern struct kvm_device_ops kvm_mpic_ops
;
1482 extern struct kvm_device_ops kvm_arm_vgic_v2_ops
;
1483 extern struct kvm_device_ops kvm_arm_vgic_v3_ops
;
1485 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1487 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
1489 vcpu
->spin_loop
.in_spin_loop
= val
;
1491 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
1493 vcpu
->spin_loop
.dy_eligible
= val
;
1496 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1498 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
1502 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
1505 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1507 static inline bool kvm_is_visible_memslot(struct kvm_memory_slot
*memslot
)
1509 return (memslot
&& memslot
->id
< KVM_USER_MEM_SLOTS
&&
1510 !(memslot
->flags
& KVM_MEMSLOT_INVALID
));
1513 struct kvm_vcpu
*kvm_get_running_vcpu(void);
1514 struct kvm_vcpu
* __percpu
*kvm_get_running_vcpus(void);
1516 #ifdef CONFIG_HAVE_KVM_IRQ_BYPASS
1517 bool kvm_arch_has_irq_bypass(void);
1518 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer
*,
1519 struct irq_bypass_producer
*);
1520 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer
*,
1521 struct irq_bypass_producer
*);
1522 void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer
*);
1523 void kvm_arch_irq_bypass_start(struct irq_bypass_consumer
*);
1524 int kvm_arch_update_irqfd_routing(struct kvm
*kvm
, unsigned int host_irq
,
1525 uint32_t guest_irq
, bool set
);
1526 #endif /* CONFIG_HAVE_KVM_IRQ_BYPASS */
1528 #ifdef CONFIG_HAVE_KVM_INVALID_WAKEUPS
1529 /* If we wakeup during the poll time, was it a sucessful poll? */
1530 static inline bool vcpu_valid_wakeup(struct kvm_vcpu
*vcpu
)
1532 return vcpu
->valid_wakeup
;
1536 static inline bool vcpu_valid_wakeup(struct kvm_vcpu
*vcpu
)
1540 #endif /* CONFIG_HAVE_KVM_INVALID_WAKEUPS */
1542 #ifdef CONFIG_HAVE_KVM_NO_POLL
1543 /* Callback that tells if we must not poll */
1544 bool kvm_arch_no_poll(struct kvm_vcpu
*vcpu
);
1546 static inline bool kvm_arch_no_poll(struct kvm_vcpu
*vcpu
)
1550 #endif /* CONFIG_HAVE_KVM_NO_POLL */
1552 #ifdef CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL
1553 long kvm_arch_vcpu_async_ioctl(struct file
*filp
,
1554 unsigned int ioctl
, unsigned long arg
);
1556 static inline long kvm_arch_vcpu_async_ioctl(struct file
*filp
,
1560 return -ENOIOCTLCMD
;
1562 #endif /* CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL */
1564 void kvm_arch_mmu_notifier_invalidate_range(struct kvm
*kvm
,
1565 unsigned long start
, unsigned long end
);
1567 #ifdef CONFIG_HAVE_KVM_VCPU_RUN_PID_CHANGE
1568 int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu
*vcpu
);
1570 static inline int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu
*vcpu
)
1574 #endif /* CONFIG_HAVE_KVM_VCPU_RUN_PID_CHANGE */
1576 typedef int (*kvm_vm_thread_fn_t
)(struct kvm
*kvm
, uintptr_t data
);
1578 int kvm_vm_create_worker_thread(struct kvm
*kvm
, kvm_vm_thread_fn_t thread_fn
,
1579 uintptr_t data
, const char *name
,
1580 struct task_struct
**thread_ptr
);
1582 #ifdef CONFIG_KVM_XFER_TO_GUEST_WORK
1583 static inline void kvm_handle_signal_exit(struct kvm_vcpu
*vcpu
)
1585 vcpu
->run
->exit_reason
= KVM_EXIT_INTR
;
1586 vcpu
->stat
.signal_exits
++;
1588 #endif /* CONFIG_KVM_XFER_TO_GUEST_WORK */
1591 * This defines how many reserved entries we want to keep before we
1592 * kick the vcpu to the userspace to avoid dirty ring full. This
1593 * value can be tuned to higher if e.g. PML is enabled on the host.
1595 #define KVM_DIRTY_RING_RSVD_ENTRIES 64
1597 /* Max number of entries allowed for each kvm dirty ring */
1598 #define KVM_DIRTY_RING_MAX_ENTRIES 65536