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 #define KVM_MMIO_SIZE 8
41 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
42 * in kvm, other bits are visible for userspace which are defined in
43 * include/linux/kvm_h.
45 #define KVM_MEMSLOT_INVALID (1UL << 16)
46 #define KVM_MEMSLOT_INCOHERENT (1UL << 17)
48 /* Two fragments for cross MMIO pages. */
49 #define KVM_MAX_MMIO_FRAGMENTS 2
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
142 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
143 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
145 extern struct kmem_cache
*kvm_vcpu_cache
;
147 extern spinlock_t kvm_lock
;
148 extern struct list_head vm_list
;
150 struct kvm_io_range
{
153 struct kvm_io_device
*dev
;
156 #define NR_IOBUS_DEVS 1000
161 struct kvm_io_range range
[];
167 KVM_VIRTIO_CCW_NOTIFY_BUS
,
172 int kvm_io_bus_write(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
173 int len
, const void *val
);
174 int kvm_io_bus_write_cookie(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
175 int len
, const void *val
, long cookie
);
176 int kvm_io_bus_read(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
, int len
,
178 int kvm_io_bus_register_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
179 int len
, struct kvm_io_device
*dev
);
180 int kvm_io_bus_unregister_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
,
181 struct kvm_io_device
*dev
);
183 #ifdef CONFIG_KVM_ASYNC_PF
184 struct kvm_async_pf
{
185 struct work_struct work
;
186 struct list_head link
;
187 struct list_head queue
;
188 struct kvm_vcpu
*vcpu
;
189 struct mm_struct
*mm
;
192 struct kvm_arch_async_pf arch
;
196 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu
*vcpu
);
197 void kvm_check_async_pf_completion(struct kvm_vcpu
*vcpu
);
198 int kvm_setup_async_pf(struct kvm_vcpu
*vcpu
, gva_t gva
, unsigned long hva
,
199 struct kvm_arch_async_pf
*arch
);
200 int kvm_async_pf_wakeup_all(struct kvm_vcpu
*vcpu
);
204 * Carry out a gup that requires IO. Allow the mm to relinquish the mmap
205 * semaphore if the filemap/swap has to wait on a page lock. pagep == NULL
206 * controls whether we retry the gup one more time to completion in that case.
207 * Typically this is called after a FAULT_FLAG_RETRY_NOWAIT in the main tdp
210 int kvm_get_user_page_io(struct task_struct
*tsk
, struct mm_struct
*mm
,
211 unsigned long addr
, bool write_fault
,
212 struct page
**pagep
);
218 READING_SHADOW_PAGE_TABLES
,
222 * Sometimes a large or cross-page mmio needs to be broken up into separate
223 * exits for userspace servicing.
225 struct kvm_mmio_fragment
{
233 #ifdef CONFIG_PREEMPT_NOTIFIERS
234 struct preempt_notifier preempt_notifier
;
240 unsigned long requests
;
241 unsigned long guest_debug
;
247 int guest_fpu_loaded
, guest_xcr0_loaded
;
248 wait_queue_head_t wq
;
252 struct kvm_vcpu_stat stat
;
254 #ifdef CONFIG_HAS_IOMEM
256 int mmio_read_completed
;
258 int mmio_cur_fragment
;
259 int mmio_nr_fragments
;
260 struct kvm_mmio_fragment mmio_fragments
[KVM_MAX_MMIO_FRAGMENTS
];
263 #ifdef CONFIG_KVM_ASYNC_PF
266 struct list_head queue
;
267 struct list_head done
;
272 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
274 * Cpu relax intercept or pause loop exit optimization
275 * in_spin_loop: set when a vcpu does a pause loop exit
276 * or cpu relax intercepted.
277 * dy_eligible: indicates whether vcpu is eligible for directed yield.
285 struct kvm_vcpu_arch arch
;
288 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu
*vcpu
)
290 return cmpxchg(&vcpu
->mode
, IN_GUEST_MODE
, EXITING_GUEST_MODE
);
294 * Some of the bitops functions do not support too long bitmaps.
295 * This number must be determined not to exceed such limits.
297 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
299 struct kvm_memory_slot
{
301 unsigned long npages
;
302 unsigned long *dirty_bitmap
;
303 struct kvm_arch_memory_slot arch
;
304 unsigned long userspace_addr
;
309 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot
*memslot
)
311 return ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
314 struct kvm_s390_adapter_int
{
322 struct kvm_kernel_irq_routing_entry
{
325 int (*set
)(struct kvm_kernel_irq_routing_entry
*e
,
326 struct kvm
*kvm
, int irq_source_id
, int level
,
334 struct kvm_s390_adapter_int adapter
;
336 struct hlist_node link
;
339 #ifndef KVM_PRIVATE_MEM_SLOTS
340 #define KVM_PRIVATE_MEM_SLOTS 0
343 #ifndef KVM_MEM_SLOTS_NUM
344 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
349 * memslots are not sorted by id anymore, please use id_to_memslot()
350 * to get the memslot by its id.
352 struct kvm_memslots
{
354 struct kvm_memory_slot memslots
[KVM_MEM_SLOTS_NUM
];
355 /* The mapping table from slot id to the index in memslots[]. */
356 short id_to_index
[KVM_MEM_SLOTS_NUM
];
363 struct mutex slots_lock
;
364 struct mm_struct
*mm
; /* userspace tied to this vm */
365 struct kvm_memslots
*memslots
;
366 struct srcu_struct srcu
;
367 struct srcu_struct irq_srcu
;
368 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
371 struct kvm_vcpu
*vcpus
[KVM_MAX_VCPUS
];
372 atomic_t online_vcpus
;
373 int last_boosted_vcpu
;
374 struct list_head vm_list
;
376 struct kvm_io_bus
*buses
[KVM_NR_BUSES
];
377 #ifdef CONFIG_HAVE_KVM_EVENTFD
380 struct list_head items
;
381 struct list_head resampler_list
;
382 struct mutex resampler_lock
;
384 struct list_head ioeventfds
;
386 struct kvm_vm_stat stat
;
387 struct kvm_arch arch
;
388 atomic_t users_count
;
389 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
390 struct kvm_coalesced_mmio_ring
*coalesced_mmio_ring
;
391 spinlock_t ring_lock
;
392 struct list_head coalesced_zones
;
395 struct mutex irq_lock
;
396 #ifdef CONFIG_HAVE_KVM_IRQCHIP
398 * Update side is protected by irq_lock.
400 struct kvm_irq_routing_table __rcu
*irq_routing
;
402 #ifdef CONFIG_HAVE_KVM_IRQFD
403 struct hlist_head irq_ack_notifier_list
;
406 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
407 struct mmu_notifier mmu_notifier
;
408 unsigned long mmu_notifier_seq
;
409 long mmu_notifier_count
;
412 struct list_head devices
;
415 #define kvm_err(fmt, ...) \
416 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
417 #define kvm_info(fmt, ...) \
418 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
419 #define kvm_debug(fmt, ...) \
420 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
421 #define kvm_pr_unimpl(fmt, ...) \
422 pr_err_ratelimited("kvm [%i]: " fmt, \
423 task_tgid_nr(current), ## __VA_ARGS__)
425 /* The guest did something we don't support. */
426 #define vcpu_unimpl(vcpu, fmt, ...) \
427 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
429 static inline struct kvm_vcpu
*kvm_get_vcpu(struct kvm
*kvm
, int i
)
432 return kvm
->vcpus
[i
];
435 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
437 idx < atomic_read(&kvm->online_vcpus) && \
438 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
441 #define kvm_for_each_memslot(memslot, slots) \
442 for (memslot = &slots->memslots[0]; \
443 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
446 int kvm_vcpu_init(struct kvm_vcpu
*vcpu
, struct kvm
*kvm
, unsigned id
);
447 void kvm_vcpu_uninit(struct kvm_vcpu
*vcpu
);
449 int __must_check
vcpu_load(struct kvm_vcpu
*vcpu
);
450 void vcpu_put(struct kvm_vcpu
*vcpu
);
452 #ifdef __KVM_HAVE_IOAPIC
453 void kvm_vcpu_request_scan_ioapic(struct kvm
*kvm
);
455 static inline void kvm_vcpu_request_scan_ioapic(struct kvm
*kvm
)
460 #ifdef CONFIG_HAVE_KVM_IRQFD
461 int kvm_irqfd_init(void);
462 void kvm_irqfd_exit(void);
464 static inline int kvm_irqfd_init(void)
469 static inline void kvm_irqfd_exit(void)
473 int kvm_init(void *opaque
, unsigned vcpu_size
, unsigned vcpu_align
,
474 struct module
*module
);
477 void kvm_get_kvm(struct kvm
*kvm
);
478 void kvm_put_kvm(struct kvm
*kvm
);
480 static inline struct kvm_memslots
*kvm_memslots(struct kvm
*kvm
)
482 return rcu_dereference_check(kvm
->memslots
,
483 srcu_read_lock_held(&kvm
->srcu
)
484 || lockdep_is_held(&kvm
->slots_lock
));
487 static inline struct kvm_memory_slot
*
488 id_to_memslot(struct kvm_memslots
*slots
, int id
)
490 int index
= slots
->id_to_index
[id
];
491 struct kvm_memory_slot
*slot
;
493 slot
= &slots
->memslots
[index
];
495 WARN_ON(slot
->id
!= id
);
500 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
501 * - create a new memory slot
502 * - delete an existing memory slot
503 * - modify an existing memory slot
504 * -- move it in the guest physical memory space
505 * -- just change its flags
507 * Since flags can be changed by some of these operations, the following
508 * differentiation is the best we can do for __kvm_set_memory_region():
517 int kvm_set_memory_region(struct kvm
*kvm
,
518 struct kvm_userspace_memory_region
*mem
);
519 int __kvm_set_memory_region(struct kvm
*kvm
,
520 struct kvm_userspace_memory_region
*mem
);
521 void kvm_arch_free_memslot(struct kvm
*kvm
, struct kvm_memory_slot
*free
,
522 struct kvm_memory_slot
*dont
);
523 int kvm_arch_create_memslot(struct kvm
*kvm
, struct kvm_memory_slot
*slot
,
524 unsigned long npages
);
525 void kvm_arch_memslots_updated(struct kvm
*kvm
);
526 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
527 struct kvm_memory_slot
*memslot
,
528 struct kvm_userspace_memory_region
*mem
,
529 enum kvm_mr_change change
);
530 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
531 struct kvm_userspace_memory_region
*mem
,
532 const struct kvm_memory_slot
*old
,
533 enum kvm_mr_change change
);
534 bool kvm_largepages_enabled(void);
535 void kvm_disable_largepages(void);
536 /* flush all memory translations */
537 void kvm_arch_flush_shadow_all(struct kvm
*kvm
);
538 /* flush memory translations pointing to 'slot' */
539 void kvm_arch_flush_shadow_memslot(struct kvm
*kvm
,
540 struct kvm_memory_slot
*slot
);
542 int gfn_to_page_many_atomic(struct kvm
*kvm
, gfn_t gfn
, struct page
**pages
,
545 struct page
*gfn_to_page(struct kvm
*kvm
, gfn_t gfn
);
546 unsigned long gfn_to_hva(struct kvm
*kvm
, gfn_t gfn
);
547 unsigned long gfn_to_hva_prot(struct kvm
*kvm
, gfn_t gfn
, bool *writable
);
548 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
549 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot
*slot
, gfn_t gfn
,
551 void kvm_release_page_clean(struct page
*page
);
552 void kvm_release_page_dirty(struct page
*page
);
553 void kvm_set_page_accessed(struct page
*page
);
555 pfn_t
gfn_to_pfn_atomic(struct kvm
*kvm
, gfn_t gfn
);
556 pfn_t
gfn_to_pfn_async(struct kvm
*kvm
, gfn_t gfn
, bool *async
,
557 bool write_fault
, bool *writable
);
558 pfn_t
gfn_to_pfn(struct kvm
*kvm
, gfn_t gfn
);
559 pfn_t
gfn_to_pfn_prot(struct kvm
*kvm
, gfn_t gfn
, bool write_fault
,
561 pfn_t
gfn_to_pfn_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
562 pfn_t
gfn_to_pfn_memslot_atomic(struct kvm_memory_slot
*slot
, gfn_t gfn
);
564 void kvm_release_pfn_clean(pfn_t pfn
);
565 void kvm_set_pfn_dirty(pfn_t pfn
);
566 void kvm_set_pfn_accessed(pfn_t pfn
);
567 void kvm_get_pfn(pfn_t pfn
);
569 int kvm_read_guest_page(struct kvm
*kvm
, gfn_t gfn
, void *data
, int offset
,
571 int kvm_read_guest_atomic(struct kvm
*kvm
, gpa_t gpa
, void *data
,
573 int kvm_read_guest(struct kvm
*kvm
, gpa_t gpa
, void *data
, unsigned long len
);
574 int kvm_read_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
575 void *data
, unsigned long len
);
576 int kvm_write_guest_page(struct kvm
*kvm
, gfn_t gfn
, const void *data
,
577 int offset
, int len
);
578 int kvm_write_guest(struct kvm
*kvm
, gpa_t gpa
, const void *data
,
580 int kvm_write_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
581 void *data
, unsigned long len
);
582 int kvm_gfn_to_hva_cache_init(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
583 gpa_t gpa
, unsigned long len
);
584 int kvm_clear_guest_page(struct kvm
*kvm
, gfn_t gfn
, int offset
, int len
);
585 int kvm_clear_guest(struct kvm
*kvm
, gpa_t gpa
, unsigned long len
);
586 struct kvm_memory_slot
*gfn_to_memslot(struct kvm
*kvm
, gfn_t gfn
);
587 int kvm_is_visible_gfn(struct kvm
*kvm
, gfn_t gfn
);
588 unsigned long kvm_host_page_size(struct kvm
*kvm
, gfn_t gfn
);
589 void mark_page_dirty(struct kvm
*kvm
, gfn_t gfn
);
591 void kvm_vcpu_block(struct kvm_vcpu
*vcpu
);
592 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
593 int kvm_vcpu_yield_to(struct kvm_vcpu
*target
);
594 void kvm_vcpu_on_spin(struct kvm_vcpu
*vcpu
);
595 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
);
596 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
);
598 void kvm_flush_remote_tlbs(struct kvm
*kvm
);
599 void kvm_reload_remote_mmus(struct kvm
*kvm
);
600 void kvm_make_mclock_inprogress_request(struct kvm
*kvm
);
601 void kvm_make_scan_ioapic_request(struct kvm
*kvm
);
602 bool kvm_make_all_cpus_request(struct kvm
*kvm
, unsigned int req
);
604 long kvm_arch_dev_ioctl(struct file
*filp
,
605 unsigned int ioctl
, unsigned long arg
);
606 long kvm_arch_vcpu_ioctl(struct file
*filp
,
607 unsigned int ioctl
, unsigned long arg
);
608 int kvm_arch_vcpu_fault(struct kvm_vcpu
*vcpu
, struct vm_fault
*vmf
);
610 int kvm_vm_ioctl_check_extension(struct kvm
*kvm
, long ext
);
612 int kvm_get_dirty_log(struct kvm
*kvm
,
613 struct kvm_dirty_log
*log
, int *is_dirty
);
614 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
615 struct kvm_dirty_log
*log
);
617 int kvm_vm_ioctl_irq_line(struct kvm
*kvm
, struct kvm_irq_level
*irq_level
,
619 long kvm_arch_vm_ioctl(struct file
*filp
,
620 unsigned int ioctl
, unsigned long arg
);
622 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
623 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
625 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
626 struct kvm_translation
*tr
);
628 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
629 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
630 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
631 struct kvm_sregs
*sregs
);
632 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
633 struct kvm_sregs
*sregs
);
634 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
635 struct kvm_mp_state
*mp_state
);
636 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
637 struct kvm_mp_state
*mp_state
);
638 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
639 struct kvm_guest_debug
*dbg
);
640 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
);
642 int kvm_arch_init(void *opaque
);
643 void kvm_arch_exit(void);
645 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
);
646 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
);
648 void kvm_arch_sched_in(struct kvm_vcpu
*vcpu
, int cpu
);
650 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
);
651 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
);
652 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
);
653 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
, unsigned int id
);
654 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
);
655 int kvm_arch_vcpu_postcreate(struct kvm_vcpu
*vcpu
);
656 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
);
658 int kvm_arch_hardware_enable(void);
659 void kvm_arch_hardware_disable(void);
660 int kvm_arch_hardware_setup(void);
661 void kvm_arch_hardware_unsetup(void);
662 void kvm_arch_check_processor_compat(void *rtn
);
663 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
);
664 int kvm_arch_vcpu_should_kick(struct kvm_vcpu
*vcpu
);
666 void *kvm_kvzalloc(unsigned long size
);
667 void kvm_kvfree(const void *addr
);
669 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
670 static inline struct kvm
*kvm_arch_alloc_vm(void)
672 return kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
675 static inline void kvm_arch_free_vm(struct kvm
*kvm
)
681 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
682 void kvm_arch_register_noncoherent_dma(struct kvm
*kvm
);
683 void kvm_arch_unregister_noncoherent_dma(struct kvm
*kvm
);
684 bool kvm_arch_has_noncoherent_dma(struct kvm
*kvm
);
686 static inline void kvm_arch_register_noncoherent_dma(struct kvm
*kvm
)
690 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm
*kvm
)
694 static inline bool kvm_arch_has_noncoherent_dma(struct kvm
*kvm
)
700 static inline wait_queue_head_t
*kvm_arch_vcpu_wq(struct kvm_vcpu
*vcpu
)
702 #ifdef __KVM_HAVE_ARCH_WQP
703 return vcpu
->arch
.wqp
;
709 int kvm_arch_init_vm(struct kvm
*kvm
, unsigned long type
);
710 void kvm_arch_destroy_vm(struct kvm
*kvm
);
711 void kvm_arch_sync_events(struct kvm
*kvm
);
713 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
);
714 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
716 bool kvm_is_reserved_pfn(pfn_t pfn
);
718 struct kvm_irq_ack_notifier
{
719 struct hlist_node link
;
721 void (*irq_acked
)(struct kvm_irq_ack_notifier
*kian
);
724 int kvm_irq_map_gsi(struct kvm
*kvm
,
725 struct kvm_kernel_irq_routing_entry
*entries
, int gsi
);
726 int kvm_irq_map_chip_pin(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
728 int kvm_set_irq(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
,
730 int kvm_set_irq_inatomic(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
);
731 int kvm_set_msi(struct kvm_kernel_irq_routing_entry
*irq_entry
, struct kvm
*kvm
,
732 int irq_source_id
, int level
, bool line_status
);
733 bool kvm_irq_has_notifier(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
734 void kvm_notify_acked_irq(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
735 void kvm_register_irq_ack_notifier(struct kvm
*kvm
,
736 struct kvm_irq_ack_notifier
*kian
);
737 void kvm_unregister_irq_ack_notifier(struct kvm
*kvm
,
738 struct kvm_irq_ack_notifier
*kian
);
739 int kvm_request_irq_source_id(struct kvm
*kvm
);
740 void kvm_free_irq_source_id(struct kvm
*kvm
, int irq_source_id
);
742 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
743 int kvm_iommu_map_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
744 void kvm_iommu_unmap_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
746 static inline int kvm_iommu_map_pages(struct kvm
*kvm
,
747 struct kvm_memory_slot
*slot
)
752 static inline void kvm_iommu_unmap_pages(struct kvm
*kvm
,
753 struct kvm_memory_slot
*slot
)
758 static inline void kvm_guest_enter(void)
762 BUG_ON(preemptible());
764 local_irq_save(flags
);
766 local_irq_restore(flags
);
768 /* KVM does not hold any references to rcu protected data when it
769 * switches CPU into a guest mode. In fact switching to a guest mode
770 * is very similar to exiting to userspace from rcu point of view. In
771 * addition CPU may stay in a guest mode for quite a long time (up to
772 * one time slice). Lets treat guest mode as quiescent state, just like
773 * we do with user-mode execution.
775 rcu_virt_note_context_switch(smp_processor_id());
778 static inline void kvm_guest_exit(void)
782 local_irq_save(flags
);
784 local_irq_restore(flags
);
788 * search_memslots() and __gfn_to_memslot() are here because they are
789 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
790 * gfn_to_memslot() itself isn't here as an inline because that would
791 * bloat other code too much.
793 static inline struct kvm_memory_slot
*
794 search_memslots(struct kvm_memslots
*slots
, gfn_t gfn
)
796 int start
= 0, end
= slots
->used_slots
;
797 int slot
= atomic_read(&slots
->lru_slot
);
798 struct kvm_memory_slot
*memslots
= slots
->memslots
;
800 if (gfn
>= memslots
[slot
].base_gfn
&&
801 gfn
< memslots
[slot
].base_gfn
+ memslots
[slot
].npages
)
802 return &memslots
[slot
];
804 while (start
< end
) {
805 slot
= start
+ (end
- start
) / 2;
807 if (gfn
>= memslots
[slot
].base_gfn
)
813 if (gfn
>= memslots
[start
].base_gfn
&&
814 gfn
< memslots
[start
].base_gfn
+ memslots
[start
].npages
) {
815 atomic_set(&slots
->lru_slot
, start
);
816 return &memslots
[start
];
822 static inline struct kvm_memory_slot
*
823 __gfn_to_memslot(struct kvm_memslots
*slots
, gfn_t gfn
)
825 return search_memslots(slots
, gfn
);
828 static inline unsigned long
829 __gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
)
831 return slot
->userspace_addr
+ (gfn
- slot
->base_gfn
) * PAGE_SIZE
;
834 static inline int memslot_id(struct kvm
*kvm
, gfn_t gfn
)
836 return gfn_to_memslot(kvm
, gfn
)->id
;
840 hva_to_gfn_memslot(unsigned long hva
, struct kvm_memory_slot
*slot
)
842 gfn_t gfn_offset
= (hva
- slot
->userspace_addr
) >> PAGE_SHIFT
;
844 return slot
->base_gfn
+ gfn_offset
;
847 static inline gpa_t
gfn_to_gpa(gfn_t gfn
)
849 return (gpa_t
)gfn
<< PAGE_SHIFT
;
852 static inline gfn_t
gpa_to_gfn(gpa_t gpa
)
854 return (gfn_t
)(gpa
>> PAGE_SHIFT
);
857 static inline hpa_t
pfn_to_hpa(pfn_t pfn
)
859 return (hpa_t
)pfn
<< PAGE_SHIFT
;
862 static inline bool kvm_is_error_gpa(struct kvm
*kvm
, gpa_t gpa
)
864 unsigned long hva
= gfn_to_hva(kvm
, gpa_to_gfn(gpa
));
866 return kvm_is_error_hva(hva
);
869 static inline void kvm_migrate_timers(struct kvm_vcpu
*vcpu
)
871 set_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
);
879 struct kvm_stats_debugfs_item
{
882 enum kvm_stat_kind kind
;
883 struct dentry
*dentry
;
885 extern struct kvm_stats_debugfs_item debugfs_entries
[];
886 extern struct dentry
*kvm_debugfs_dir
;
888 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
889 static inline int mmu_notifier_retry(struct kvm
*kvm
, unsigned long mmu_seq
)
891 if (unlikely(kvm
->mmu_notifier_count
))
894 * Ensure the read of mmu_notifier_count happens before the read
895 * of mmu_notifier_seq. This interacts with the smp_wmb() in
896 * mmu_notifier_invalidate_range_end to make sure that the caller
897 * either sees the old (non-zero) value of mmu_notifier_count or
898 * the new (incremented) value of mmu_notifier_seq.
899 * PowerPC Book3s HV KVM calls this under a per-page lock
900 * rather than under kvm->mmu_lock, for scalability, so
901 * can't rely on kvm->mmu_lock to keep things ordered.
904 if (kvm
->mmu_notifier_seq
!= mmu_seq
)
910 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
913 #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that...
915 #define KVM_MAX_IRQ_ROUTES 1024
918 int kvm_setup_default_irq_routing(struct kvm
*kvm
);
919 int kvm_set_irq_routing(struct kvm
*kvm
,
920 const struct kvm_irq_routing_entry
*entries
,
923 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry
*e
,
924 const struct kvm_irq_routing_entry
*ue
);
925 void kvm_free_irq_routing(struct kvm
*kvm
);
929 static inline void kvm_free_irq_routing(struct kvm
*kvm
) {}
933 int kvm_send_userspace_msi(struct kvm
*kvm
, struct kvm_msi
*msi
);
935 #ifdef CONFIG_HAVE_KVM_EVENTFD
937 void kvm_eventfd_init(struct kvm
*kvm
);
938 int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
);
940 #ifdef CONFIG_HAVE_KVM_IRQFD
941 int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
);
942 void kvm_irqfd_release(struct kvm
*kvm
);
943 void kvm_irq_routing_update(struct kvm
*);
945 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
950 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
955 static inline void kvm_eventfd_init(struct kvm
*kvm
) {}
957 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
962 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
964 #ifdef CONFIG_HAVE_KVM_IRQCHIP
965 static inline void kvm_irq_routing_update(struct kvm
*kvm
)
970 static inline int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
)
975 #endif /* CONFIG_HAVE_KVM_EVENTFD */
977 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
978 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu
*vcpu
)
980 return vcpu
->kvm
->bsp_vcpu_id
== vcpu
->vcpu_id
;
983 bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
);
987 static inline bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
) { return true; }
991 static inline void kvm_make_request(int req
, struct kvm_vcpu
*vcpu
)
993 set_bit(req
, &vcpu
->requests
);
996 static inline bool kvm_check_request(int req
, struct kvm_vcpu
*vcpu
)
998 if (test_bit(req
, &vcpu
->requests
)) {
999 clear_bit(req
, &vcpu
->requests
);
1006 extern bool kvm_rebooting
;
1009 struct kvm_device_ops
*ops
;
1012 struct list_head vm_node
;
1015 /* create, destroy, and name are mandatory */
1016 struct kvm_device_ops
{
1018 int (*create
)(struct kvm_device
*dev
, u32 type
);
1021 * Destroy is responsible for freeing dev.
1023 * Destroy may be called before or after destructors are called
1024 * on emulated I/O regions, depending on whether a reference is
1025 * held by a vcpu or other kvm component that gets destroyed
1026 * after the emulated I/O.
1028 void (*destroy
)(struct kvm_device
*dev
);
1030 int (*set_attr
)(struct kvm_device
*dev
, struct kvm_device_attr
*attr
);
1031 int (*get_attr
)(struct kvm_device
*dev
, struct kvm_device_attr
*attr
);
1032 int (*has_attr
)(struct kvm_device
*dev
, struct kvm_device_attr
*attr
);
1033 long (*ioctl
)(struct kvm_device
*dev
, unsigned int ioctl
,
1037 void kvm_device_get(struct kvm_device
*dev
);
1038 void kvm_device_put(struct kvm_device
*dev
);
1039 struct kvm_device
*kvm_device_from_filp(struct file
*filp
);
1040 int kvm_register_device_ops(struct kvm_device_ops
*ops
, u32 type
);
1041 void kvm_unregister_device_ops(u32 type
);
1043 extern struct kvm_device_ops kvm_mpic_ops
;
1044 extern struct kvm_device_ops kvm_xics_ops
;
1046 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1048 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
1050 vcpu
->spin_loop
.in_spin_loop
= val
;
1052 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
1054 vcpu
->spin_loop
.dy_eligible
= val
;
1057 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1059 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
1063 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
1066 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */