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)
47 /* Two fragments for cross MMIO pages. */
48 #define KVM_MAX_MMIO_FRAGMENTS 2
51 * For the normal pfn, the highest 12 bits should be zero,
52 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
53 * mask bit 63 to indicate the noslot pfn.
55 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
56 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
57 #define KVM_PFN_NOSLOT (0x1ULL << 63)
59 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
60 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
61 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
64 * error pfns indicate that the gfn is in slot but faild to
65 * translate it to pfn on host.
67 static inline bool is_error_pfn(pfn_t pfn
)
69 return !!(pfn
& KVM_PFN_ERR_MASK
);
73 * error_noslot pfns indicate that the gfn can not be
74 * translated to pfn - it is not in slot or failed to
75 * translate it to pfn.
77 static inline bool is_error_noslot_pfn(pfn_t pfn
)
79 return !!(pfn
& KVM_PFN_ERR_NOSLOT_MASK
);
82 /* noslot pfn indicates that the gfn is not in slot. */
83 static inline bool is_noslot_pfn(pfn_t pfn
)
85 return pfn
== KVM_PFN_NOSLOT
;
89 * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390)
90 * provide own defines and kvm_is_error_hva
92 #ifndef KVM_HVA_ERR_BAD
94 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
95 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
97 static inline bool kvm_is_error_hva(unsigned long addr
)
99 return addr
>= PAGE_OFFSET
;
104 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
106 static inline bool is_error_page(struct page
*page
)
112 * vcpu->requests bit members
114 #define KVM_REQ_TLB_FLUSH 0
115 #define KVM_REQ_MIGRATE_TIMER 1
116 #define KVM_REQ_REPORT_TPR_ACCESS 2
117 #define KVM_REQ_MMU_RELOAD 3
118 #define KVM_REQ_TRIPLE_FAULT 4
119 #define KVM_REQ_PENDING_TIMER 5
120 #define KVM_REQ_UNHALT 6
121 #define KVM_REQ_MMU_SYNC 7
122 #define KVM_REQ_CLOCK_UPDATE 8
123 #define KVM_REQ_KICK 9
124 #define KVM_REQ_DEACTIVATE_FPU 10
125 #define KVM_REQ_EVENT 11
126 #define KVM_REQ_APF_HALT 12
127 #define KVM_REQ_STEAL_UPDATE 13
128 #define KVM_REQ_NMI 14
129 #define KVM_REQ_PMU 15
130 #define KVM_REQ_PMI 16
131 #define KVM_REQ_WATCHDOG 17
132 #define KVM_REQ_MASTERCLOCK_UPDATE 18
133 #define KVM_REQ_MCLOCK_INPROGRESS 19
134 #define KVM_REQ_EPR_EXIT 20
135 #define KVM_REQ_SCAN_IOAPIC 21
136 #define KVM_REQ_GLOBAL_CLOCK_UPDATE 22
137 #define KVM_REQ_ENABLE_IBS 23
138 #define KVM_REQ_DISABLE_IBS 24
139 #define KVM_REQ_APIC_PAGE_RELOAD 25
141 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
142 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
144 extern struct kmem_cache
*kvm_vcpu_cache
;
146 extern spinlock_t kvm_lock
;
147 extern struct list_head vm_list
;
149 struct kvm_io_range
{
152 struct kvm_io_device
*dev
;
155 #define NR_IOBUS_DEVS 1000
160 struct kvm_io_range range
[];
166 KVM_VIRTIO_CCW_NOTIFY_BUS
,
171 int kvm_io_bus_write(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
172 int len
, const void *val
);
173 int kvm_io_bus_write_cookie(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
174 int len
, const void *val
, long cookie
);
175 int kvm_io_bus_read(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
, int len
,
177 int kvm_io_bus_register_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
178 int len
, struct kvm_io_device
*dev
);
179 int kvm_io_bus_unregister_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
,
180 struct kvm_io_device
*dev
);
182 #ifdef CONFIG_KVM_ASYNC_PF
183 struct kvm_async_pf
{
184 struct work_struct work
;
185 struct list_head link
;
186 struct list_head queue
;
187 struct kvm_vcpu
*vcpu
;
188 struct mm_struct
*mm
;
191 struct kvm_arch_async_pf arch
;
195 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu
*vcpu
);
196 void kvm_check_async_pf_completion(struct kvm_vcpu
*vcpu
);
197 int kvm_setup_async_pf(struct kvm_vcpu
*vcpu
, gva_t gva
, unsigned long hva
,
198 struct kvm_arch_async_pf
*arch
);
199 int kvm_async_pf_wakeup_all(struct kvm_vcpu
*vcpu
);
203 * Carry out a gup that requires IO. Allow the mm to relinquish the mmap
204 * semaphore if the filemap/swap has to wait on a page lock. pagep == NULL
205 * controls whether we retry the gup one more time to completion in that case.
206 * Typically this is called after a FAULT_FLAG_RETRY_NOWAIT in the main tdp
209 int kvm_get_user_page_io(struct task_struct
*tsk
, struct mm_struct
*mm
,
210 unsigned long addr
, bool write_fault
,
211 struct page
**pagep
);
217 READING_SHADOW_PAGE_TABLES
,
221 * Sometimes a large or cross-page mmio needs to be broken up into separate
222 * exits for userspace servicing.
224 struct kvm_mmio_fragment
{
232 #ifdef CONFIG_PREEMPT_NOTIFIERS
233 struct preempt_notifier preempt_notifier
;
239 unsigned long requests
;
240 unsigned long guest_debug
;
246 int guest_fpu_loaded
, guest_xcr0_loaded
;
247 wait_queue_head_t wq
;
251 struct kvm_vcpu_stat stat
;
253 #ifdef CONFIG_HAS_IOMEM
255 int mmio_read_completed
;
257 int mmio_cur_fragment
;
258 int mmio_nr_fragments
;
259 struct kvm_mmio_fragment mmio_fragments
[KVM_MAX_MMIO_FRAGMENTS
];
262 #ifdef CONFIG_KVM_ASYNC_PF
265 struct list_head queue
;
266 struct list_head done
;
271 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
273 * Cpu relax intercept or pause loop exit optimization
274 * in_spin_loop: set when a vcpu does a pause loop exit
275 * or cpu relax intercepted.
276 * dy_eligible: indicates whether vcpu is eligible for directed yield.
284 struct kvm_vcpu_arch arch
;
287 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu
*vcpu
)
289 return cmpxchg(&vcpu
->mode
, IN_GUEST_MODE
, EXITING_GUEST_MODE
);
293 * Some of the bitops functions do not support too long bitmaps.
294 * This number must be determined not to exceed such limits.
296 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
298 struct kvm_memory_slot
{
300 unsigned long npages
;
301 unsigned long *dirty_bitmap
;
302 struct kvm_arch_memory_slot arch
;
303 unsigned long userspace_addr
;
308 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot
*memslot
)
310 return ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
313 struct kvm_s390_adapter_int
{
321 struct kvm_kernel_irq_routing_entry
{
324 int (*set
)(struct kvm_kernel_irq_routing_entry
*e
,
325 struct kvm
*kvm
, int irq_source_id
, int level
,
333 struct kvm_s390_adapter_int adapter
;
335 struct hlist_node link
;
338 #ifndef KVM_PRIVATE_MEM_SLOTS
339 #define KVM_PRIVATE_MEM_SLOTS 0
342 #ifndef KVM_MEM_SLOTS_NUM
343 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
348 * memslots are not sorted by id anymore, please use id_to_memslot()
349 * to get the memslot by its id.
351 struct kvm_memslots
{
353 struct kvm_memory_slot memslots
[KVM_MEM_SLOTS_NUM
];
354 /* The mapping table from slot id to the index in memslots[]. */
355 short id_to_index
[KVM_MEM_SLOTS_NUM
];
360 struct mutex slots_lock
;
361 struct mm_struct
*mm
; /* userspace tied to this vm */
362 struct kvm_memslots
*memslots
;
363 struct srcu_struct srcu
;
364 struct srcu_struct irq_srcu
;
365 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
368 struct kvm_vcpu
*vcpus
[KVM_MAX_VCPUS
];
369 atomic_t online_vcpus
;
370 int last_boosted_vcpu
;
371 struct list_head vm_list
;
373 struct kvm_io_bus
*buses
[KVM_NR_BUSES
];
374 #ifdef CONFIG_HAVE_KVM_EVENTFD
377 struct list_head items
;
378 struct list_head resampler_list
;
379 struct mutex resampler_lock
;
381 struct list_head ioeventfds
;
383 struct kvm_vm_stat stat
;
384 struct kvm_arch arch
;
385 atomic_t users_count
;
386 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
387 struct kvm_coalesced_mmio_ring
*coalesced_mmio_ring
;
388 spinlock_t ring_lock
;
389 struct list_head coalesced_zones
;
392 struct mutex irq_lock
;
393 #ifdef CONFIG_HAVE_KVM_IRQCHIP
395 * Update side is protected by irq_lock.
397 struct kvm_irq_routing_table __rcu
*irq_routing
;
398 struct hlist_head mask_notifier_list
;
400 #ifdef CONFIG_HAVE_KVM_IRQFD
401 struct hlist_head irq_ack_notifier_list
;
404 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
405 struct mmu_notifier mmu_notifier
;
406 unsigned long mmu_notifier_seq
;
407 long mmu_notifier_count
;
410 struct list_head devices
;
413 #define kvm_err(fmt, ...) \
414 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
415 #define kvm_info(fmt, ...) \
416 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
417 #define kvm_debug(fmt, ...) \
418 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
419 #define kvm_pr_unimpl(fmt, ...) \
420 pr_err_ratelimited("kvm [%i]: " fmt, \
421 task_tgid_nr(current), ## __VA_ARGS__)
423 /* The guest did something we don't support. */
424 #define vcpu_unimpl(vcpu, fmt, ...) \
425 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
427 static inline struct kvm_vcpu
*kvm_get_vcpu(struct kvm
*kvm
, int i
)
430 return kvm
->vcpus
[i
];
433 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
435 idx < atomic_read(&kvm->online_vcpus) && \
436 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
439 #define kvm_for_each_memslot(memslot, slots) \
440 for (memslot = &slots->memslots[0]; \
441 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
444 int kvm_vcpu_init(struct kvm_vcpu
*vcpu
, struct kvm
*kvm
, unsigned id
);
445 void kvm_vcpu_uninit(struct kvm_vcpu
*vcpu
);
447 int __must_check
vcpu_load(struct kvm_vcpu
*vcpu
);
448 void vcpu_put(struct kvm_vcpu
*vcpu
);
450 #ifdef CONFIG_HAVE_KVM_IRQFD
451 int kvm_irqfd_init(void);
452 void kvm_irqfd_exit(void);
454 static inline int kvm_irqfd_init(void)
459 static inline void kvm_irqfd_exit(void)
463 int kvm_init(void *opaque
, unsigned vcpu_size
, unsigned vcpu_align
,
464 struct module
*module
);
467 void kvm_get_kvm(struct kvm
*kvm
);
468 void kvm_put_kvm(struct kvm
*kvm
);
470 static inline struct kvm_memslots
*kvm_memslots(struct kvm
*kvm
)
472 return rcu_dereference_check(kvm
->memslots
,
473 srcu_read_lock_held(&kvm
->srcu
)
474 || lockdep_is_held(&kvm
->slots_lock
));
477 static inline struct kvm_memory_slot
*
478 id_to_memslot(struct kvm_memslots
*slots
, int id
)
480 int index
= slots
->id_to_index
[id
];
481 struct kvm_memory_slot
*slot
;
483 slot
= &slots
->memslots
[index
];
485 WARN_ON(slot
->id
!= id
);
490 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
491 * - create a new memory slot
492 * - delete an existing memory slot
493 * - modify an existing memory slot
494 * -- move it in the guest physical memory space
495 * -- just change its flags
497 * Since flags can be changed by some of these operations, the following
498 * differentiation is the best we can do for __kvm_set_memory_region():
507 int kvm_set_memory_region(struct kvm
*kvm
,
508 struct kvm_userspace_memory_region
*mem
);
509 int __kvm_set_memory_region(struct kvm
*kvm
,
510 struct kvm_userspace_memory_region
*mem
);
511 void kvm_arch_free_memslot(struct kvm
*kvm
, struct kvm_memory_slot
*free
,
512 struct kvm_memory_slot
*dont
);
513 int kvm_arch_create_memslot(struct kvm
*kvm
, struct kvm_memory_slot
*slot
,
514 unsigned long npages
);
515 void kvm_arch_memslots_updated(struct kvm
*kvm
);
516 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
517 struct kvm_memory_slot
*memslot
,
518 struct kvm_userspace_memory_region
*mem
,
519 enum kvm_mr_change change
);
520 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
521 struct kvm_userspace_memory_region
*mem
,
522 const struct kvm_memory_slot
*old
,
523 enum kvm_mr_change change
);
524 bool kvm_largepages_enabled(void);
525 void kvm_disable_largepages(void);
526 /* flush all memory translations */
527 void kvm_arch_flush_shadow_all(struct kvm
*kvm
);
528 /* flush memory translations pointing to 'slot' */
529 void kvm_arch_flush_shadow_memslot(struct kvm
*kvm
,
530 struct kvm_memory_slot
*slot
);
532 int gfn_to_page_many_atomic(struct kvm
*kvm
, gfn_t gfn
, struct page
**pages
,
535 struct page
*gfn_to_page(struct kvm
*kvm
, gfn_t gfn
);
536 unsigned long gfn_to_hva(struct kvm
*kvm
, gfn_t gfn
);
537 unsigned long gfn_to_hva_prot(struct kvm
*kvm
, gfn_t gfn
, bool *writable
);
538 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
539 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot
*slot
, gfn_t gfn
,
541 void kvm_release_page_clean(struct page
*page
);
542 void kvm_release_page_dirty(struct page
*page
);
543 void kvm_set_page_accessed(struct page
*page
);
545 pfn_t
gfn_to_pfn_atomic(struct kvm
*kvm
, gfn_t gfn
);
546 pfn_t
gfn_to_pfn_async(struct kvm
*kvm
, gfn_t gfn
, bool *async
,
547 bool write_fault
, bool *writable
);
548 pfn_t
gfn_to_pfn(struct kvm
*kvm
, gfn_t gfn
);
549 pfn_t
gfn_to_pfn_prot(struct kvm
*kvm
, gfn_t gfn
, bool write_fault
,
551 pfn_t
gfn_to_pfn_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
552 pfn_t
gfn_to_pfn_memslot_atomic(struct kvm_memory_slot
*slot
, gfn_t gfn
);
554 void kvm_release_pfn_clean(pfn_t pfn
);
555 void kvm_set_pfn_dirty(pfn_t pfn
);
556 void kvm_set_pfn_accessed(pfn_t pfn
);
557 void kvm_get_pfn(pfn_t pfn
);
559 int kvm_read_guest_page(struct kvm
*kvm
, gfn_t gfn
, void *data
, int offset
,
561 int kvm_read_guest_atomic(struct kvm
*kvm
, gpa_t gpa
, void *data
,
563 int kvm_read_guest(struct kvm
*kvm
, gpa_t gpa
, void *data
, unsigned long len
);
564 int kvm_read_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
565 void *data
, unsigned long len
);
566 int kvm_write_guest_page(struct kvm
*kvm
, gfn_t gfn
, const void *data
,
567 int offset
, int len
);
568 int kvm_write_guest(struct kvm
*kvm
, gpa_t gpa
, const void *data
,
570 int kvm_write_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
571 void *data
, unsigned long len
);
572 int kvm_gfn_to_hva_cache_init(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
573 gpa_t gpa
, unsigned long len
);
574 int kvm_clear_guest_page(struct kvm
*kvm
, gfn_t gfn
, int offset
, int len
);
575 int kvm_clear_guest(struct kvm
*kvm
, gpa_t gpa
, unsigned long len
);
576 struct kvm_memory_slot
*gfn_to_memslot(struct kvm
*kvm
, gfn_t gfn
);
577 int kvm_is_visible_gfn(struct kvm
*kvm
, gfn_t gfn
);
578 unsigned long kvm_host_page_size(struct kvm
*kvm
, gfn_t gfn
);
579 void mark_page_dirty(struct kvm
*kvm
, gfn_t gfn
);
581 void kvm_vcpu_block(struct kvm_vcpu
*vcpu
);
582 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
583 int kvm_vcpu_yield_to(struct kvm_vcpu
*target
);
584 void kvm_vcpu_on_spin(struct kvm_vcpu
*vcpu
);
585 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
);
586 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
);
588 void kvm_flush_remote_tlbs(struct kvm
*kvm
);
589 void kvm_reload_remote_mmus(struct kvm
*kvm
);
590 void kvm_make_mclock_inprogress_request(struct kvm
*kvm
);
591 void kvm_make_scan_ioapic_request(struct kvm
*kvm
);
592 bool kvm_make_all_cpus_request(struct kvm
*kvm
, unsigned int req
);
594 long kvm_arch_dev_ioctl(struct file
*filp
,
595 unsigned int ioctl
, unsigned long arg
);
596 long kvm_arch_vcpu_ioctl(struct file
*filp
,
597 unsigned int ioctl
, unsigned long arg
);
598 int kvm_arch_vcpu_fault(struct kvm_vcpu
*vcpu
, struct vm_fault
*vmf
);
600 int kvm_vm_ioctl_check_extension(struct kvm
*kvm
, long ext
);
602 int kvm_get_dirty_log(struct kvm
*kvm
,
603 struct kvm_dirty_log
*log
, int *is_dirty
);
604 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
605 struct kvm_dirty_log
*log
);
607 int kvm_vm_ioctl_irq_line(struct kvm
*kvm
, struct kvm_irq_level
*irq_level
,
609 long kvm_arch_vm_ioctl(struct file
*filp
,
610 unsigned int ioctl
, unsigned long arg
);
612 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
613 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
615 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
616 struct kvm_translation
*tr
);
618 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
619 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
620 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
621 struct kvm_sregs
*sregs
);
622 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
623 struct kvm_sregs
*sregs
);
624 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
625 struct kvm_mp_state
*mp_state
);
626 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
627 struct kvm_mp_state
*mp_state
);
628 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
629 struct kvm_guest_debug
*dbg
);
630 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
);
632 int kvm_arch_init(void *opaque
);
633 void kvm_arch_exit(void);
635 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
);
636 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
);
638 void kvm_arch_sched_in(struct kvm_vcpu
*vcpu
, int cpu
);
640 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
);
641 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
);
642 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
);
643 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
, unsigned int id
);
644 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
);
645 int kvm_arch_vcpu_postcreate(struct kvm_vcpu
*vcpu
);
646 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
);
648 int kvm_arch_hardware_enable(void);
649 void kvm_arch_hardware_disable(void);
650 int kvm_arch_hardware_setup(void);
651 void kvm_arch_hardware_unsetup(void);
652 void kvm_arch_check_processor_compat(void *rtn
);
653 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
);
654 int kvm_arch_vcpu_should_kick(struct kvm_vcpu
*vcpu
);
656 void *kvm_kvzalloc(unsigned long size
);
657 void kvm_kvfree(const void *addr
);
659 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
660 static inline struct kvm
*kvm_arch_alloc_vm(void)
662 return kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
665 static inline void kvm_arch_free_vm(struct kvm
*kvm
)
671 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
672 void kvm_arch_register_noncoherent_dma(struct kvm
*kvm
);
673 void kvm_arch_unregister_noncoherent_dma(struct kvm
*kvm
);
674 bool kvm_arch_has_noncoherent_dma(struct kvm
*kvm
);
676 static inline void kvm_arch_register_noncoherent_dma(struct kvm
*kvm
)
680 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm
*kvm
)
684 static inline bool kvm_arch_has_noncoherent_dma(struct kvm
*kvm
)
690 static inline wait_queue_head_t
*kvm_arch_vcpu_wq(struct kvm_vcpu
*vcpu
)
692 #ifdef __KVM_HAVE_ARCH_WQP
693 return vcpu
->arch
.wqp
;
699 int kvm_arch_init_vm(struct kvm
*kvm
, unsigned long type
);
700 void kvm_arch_destroy_vm(struct kvm
*kvm
);
701 void kvm_arch_sync_events(struct kvm
*kvm
);
703 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
);
704 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
706 bool kvm_is_mmio_pfn(pfn_t pfn
);
708 struct kvm_irq_ack_notifier
{
709 struct hlist_node link
;
711 void (*irq_acked
)(struct kvm_irq_ack_notifier
*kian
);
714 struct kvm_assigned_dev_kernel
{
715 struct kvm_irq_ack_notifier ack_notifier
;
716 struct list_head list
;
721 unsigned int entries_nr
;
723 bool host_irq_disabled
;
725 struct msix_entry
*host_msix_entries
;
727 struct msix_entry
*guest_msix_entries
;
728 unsigned long irq_requested_type
;
733 spinlock_t intx_lock
;
734 spinlock_t intx_mask_lock
;
736 struct pci_saved_state
*pci_saved_state
;
739 struct kvm_irq_mask_notifier
{
740 void (*func
)(struct kvm_irq_mask_notifier
*kimn
, bool masked
);
742 struct hlist_node link
;
745 void kvm_register_irq_mask_notifier(struct kvm
*kvm
, int irq
,
746 struct kvm_irq_mask_notifier
*kimn
);
747 void kvm_unregister_irq_mask_notifier(struct kvm
*kvm
, int irq
,
748 struct kvm_irq_mask_notifier
*kimn
);
749 void kvm_fire_mask_notifiers(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
,
752 int kvm_irq_map_gsi(struct kvm
*kvm
,
753 struct kvm_kernel_irq_routing_entry
*entries
, int gsi
);
754 int kvm_irq_map_chip_pin(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
756 int kvm_set_irq(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
,
758 int kvm_set_irq_inatomic(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
);
759 int kvm_set_msi(struct kvm_kernel_irq_routing_entry
*irq_entry
, struct kvm
*kvm
,
760 int irq_source_id
, int level
, bool line_status
);
761 bool kvm_irq_has_notifier(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
762 void kvm_notify_acked_irq(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
763 void kvm_register_irq_ack_notifier(struct kvm
*kvm
,
764 struct kvm_irq_ack_notifier
*kian
);
765 void kvm_unregister_irq_ack_notifier(struct kvm
*kvm
,
766 struct kvm_irq_ack_notifier
*kian
);
767 int kvm_request_irq_source_id(struct kvm
*kvm
);
768 void kvm_free_irq_source_id(struct kvm
*kvm
, int irq_source_id
);
770 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
771 int kvm_iommu_map_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
772 void kvm_iommu_unmap_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
773 int kvm_iommu_map_guest(struct kvm
*kvm
);
774 int kvm_iommu_unmap_guest(struct kvm
*kvm
);
775 int kvm_assign_device(struct kvm
*kvm
,
776 struct kvm_assigned_dev_kernel
*assigned_dev
);
777 int kvm_deassign_device(struct kvm
*kvm
,
778 struct kvm_assigned_dev_kernel
*assigned_dev
);
780 static inline int kvm_iommu_map_pages(struct kvm
*kvm
,
781 struct kvm_memory_slot
*slot
)
786 static inline void kvm_iommu_unmap_pages(struct kvm
*kvm
,
787 struct kvm_memory_slot
*slot
)
791 static inline int kvm_iommu_unmap_guest(struct kvm
*kvm
)
797 static inline void kvm_guest_enter(void)
801 BUG_ON(preemptible());
803 local_irq_save(flags
);
805 local_irq_restore(flags
);
807 /* KVM does not hold any references to rcu protected data when it
808 * switches CPU into a guest mode. In fact switching to a guest mode
809 * is very similar to exiting to userspace from rcu point of view. In
810 * addition CPU may stay in a guest mode for quite a long time (up to
811 * one time slice). Lets treat guest mode as quiescent state, just like
812 * we do with user-mode execution.
814 rcu_virt_note_context_switch(smp_processor_id());
817 static inline void kvm_guest_exit(void)
821 local_irq_save(flags
);
823 local_irq_restore(flags
);
827 * search_memslots() and __gfn_to_memslot() are here because they are
828 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
829 * gfn_to_memslot() itself isn't here as an inline because that would
830 * bloat other code too much.
832 static inline struct kvm_memory_slot
*
833 search_memslots(struct kvm_memslots
*slots
, gfn_t gfn
)
835 struct kvm_memory_slot
*memslot
;
837 kvm_for_each_memslot(memslot
, slots
)
838 if (gfn
>= memslot
->base_gfn
&&
839 gfn
< memslot
->base_gfn
+ memslot
->npages
)
845 static inline struct kvm_memory_slot
*
846 __gfn_to_memslot(struct kvm_memslots
*slots
, gfn_t gfn
)
848 return search_memslots(slots
, gfn
);
851 static inline unsigned long
852 __gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
)
854 return slot
->userspace_addr
+ (gfn
- slot
->base_gfn
) * PAGE_SIZE
;
857 static inline int memslot_id(struct kvm
*kvm
, gfn_t gfn
)
859 return gfn_to_memslot(kvm
, gfn
)->id
;
863 hva_to_gfn_memslot(unsigned long hva
, struct kvm_memory_slot
*slot
)
865 gfn_t gfn_offset
= (hva
- slot
->userspace_addr
) >> PAGE_SHIFT
;
867 return slot
->base_gfn
+ gfn_offset
;
870 static inline gpa_t
gfn_to_gpa(gfn_t gfn
)
872 return (gpa_t
)gfn
<< PAGE_SHIFT
;
875 static inline gfn_t
gpa_to_gfn(gpa_t gpa
)
877 return (gfn_t
)(gpa
>> PAGE_SHIFT
);
880 static inline hpa_t
pfn_to_hpa(pfn_t pfn
)
882 return (hpa_t
)pfn
<< PAGE_SHIFT
;
885 static inline bool kvm_is_error_gpa(struct kvm
*kvm
, gpa_t gpa
)
887 unsigned long hva
= gfn_to_hva(kvm
, gpa_to_gfn(gpa
));
889 return kvm_is_error_hva(hva
);
892 static inline void kvm_migrate_timers(struct kvm_vcpu
*vcpu
)
894 set_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
);
902 struct kvm_stats_debugfs_item
{
905 enum kvm_stat_kind kind
;
906 struct dentry
*dentry
;
908 extern struct kvm_stats_debugfs_item debugfs_entries
[];
909 extern struct dentry
*kvm_debugfs_dir
;
911 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
912 static inline int mmu_notifier_retry(struct kvm
*kvm
, unsigned long mmu_seq
)
914 if (unlikely(kvm
->mmu_notifier_count
))
917 * Ensure the read of mmu_notifier_count happens before the read
918 * of mmu_notifier_seq. This interacts with the smp_wmb() in
919 * mmu_notifier_invalidate_range_end to make sure that the caller
920 * either sees the old (non-zero) value of mmu_notifier_count or
921 * the new (incremented) value of mmu_notifier_seq.
922 * PowerPC Book3s HV KVM calls this under a per-page lock
923 * rather than under kvm->mmu_lock, for scalability, so
924 * can't rely on kvm->mmu_lock to keep things ordered.
927 if (kvm
->mmu_notifier_seq
!= mmu_seq
)
933 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
936 #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that...
938 #define KVM_MAX_IRQ_ROUTES 1024
941 int kvm_setup_default_irq_routing(struct kvm
*kvm
);
942 int kvm_set_irq_routing(struct kvm
*kvm
,
943 const struct kvm_irq_routing_entry
*entries
,
946 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry
*e
,
947 const struct kvm_irq_routing_entry
*ue
);
948 void kvm_free_irq_routing(struct kvm
*kvm
);
952 static inline void kvm_free_irq_routing(struct kvm
*kvm
) {}
956 int kvm_send_userspace_msi(struct kvm
*kvm
, struct kvm_msi
*msi
);
958 #ifdef CONFIG_HAVE_KVM_EVENTFD
960 void kvm_eventfd_init(struct kvm
*kvm
);
961 int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
);
963 #ifdef CONFIG_HAVE_KVM_IRQFD
964 int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
);
965 void kvm_irqfd_release(struct kvm
*kvm
);
966 void kvm_irq_routing_update(struct kvm
*);
968 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
973 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
978 static inline void kvm_eventfd_init(struct kvm
*kvm
) {}
980 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
985 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
987 #ifdef CONFIG_HAVE_KVM_IRQCHIP
988 static inline void kvm_irq_routing_update(struct kvm
*kvm
)
993 static inline int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
)
998 #endif /* CONFIG_HAVE_KVM_EVENTFD */
1000 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
1001 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu
*vcpu
)
1003 return vcpu
->kvm
->bsp_vcpu_id
== vcpu
->vcpu_id
;
1006 bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
);
1010 static inline bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
) { return true; }
1014 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
1016 long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
1019 void kvm_free_all_assigned_devices(struct kvm
*kvm
);
1023 static inline long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
1029 static inline void kvm_free_all_assigned_devices(struct kvm
*kvm
) {}
1033 static inline void kvm_make_request(int req
, struct kvm_vcpu
*vcpu
)
1035 set_bit(req
, &vcpu
->requests
);
1038 static inline bool kvm_check_request(int req
, struct kvm_vcpu
*vcpu
)
1040 if (test_bit(req
, &vcpu
->requests
)) {
1041 clear_bit(req
, &vcpu
->requests
);
1048 extern bool kvm_rebooting
;
1051 struct kvm_device_ops
*ops
;
1054 struct list_head vm_node
;
1057 /* create, destroy, and name are mandatory */
1058 struct kvm_device_ops
{
1060 int (*create
)(struct kvm_device
*dev
, u32 type
);
1063 * Destroy is responsible for freeing dev.
1065 * Destroy may be called before or after destructors are called
1066 * on emulated I/O regions, depending on whether a reference is
1067 * held by a vcpu or other kvm component that gets destroyed
1068 * after the emulated I/O.
1070 void (*destroy
)(struct kvm_device
*dev
);
1072 int (*set_attr
)(struct kvm_device
*dev
, struct kvm_device_attr
*attr
);
1073 int (*get_attr
)(struct kvm_device
*dev
, struct kvm_device_attr
*attr
);
1074 int (*has_attr
)(struct kvm_device
*dev
, struct kvm_device_attr
*attr
);
1075 long (*ioctl
)(struct kvm_device
*dev
, unsigned int ioctl
,
1079 void kvm_device_get(struct kvm_device
*dev
);
1080 void kvm_device_put(struct kvm_device
*dev
);
1081 struct kvm_device
*kvm_device_from_filp(struct file
*filp
);
1082 int kvm_register_device_ops(struct kvm_device_ops
*ops
, u32 type
);
1084 extern struct kvm_device_ops kvm_mpic_ops
;
1085 extern struct kvm_device_ops kvm_xics_ops
;
1087 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1089 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
1091 vcpu
->spin_loop
.in_spin_loop
= val
;
1093 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
1095 vcpu
->spin_loop
.dy_eligible
= val
;
1098 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1100 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
1104 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
1107 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */