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
140 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
141 #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
);
207 READING_SHADOW_PAGE_TABLES
,
211 * Sometimes a large or cross-page mmio needs to be broken up into separate
212 * exits for userspace servicing.
214 struct kvm_mmio_fragment
{
222 #ifdef CONFIG_PREEMPT_NOTIFIERS
223 struct preempt_notifier preempt_notifier
;
229 unsigned long requests
;
230 unsigned long guest_debug
;
236 int guest_fpu_loaded
, guest_xcr0_loaded
;
237 wait_queue_head_t wq
;
241 struct kvm_vcpu_stat stat
;
243 #ifdef CONFIG_HAS_IOMEM
245 int mmio_read_completed
;
247 int mmio_cur_fragment
;
248 int mmio_nr_fragments
;
249 struct kvm_mmio_fragment mmio_fragments
[KVM_MAX_MMIO_FRAGMENTS
];
252 #ifdef CONFIG_KVM_ASYNC_PF
255 struct list_head queue
;
256 struct list_head done
;
261 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
263 * Cpu relax intercept or pause loop exit optimization
264 * in_spin_loop: set when a vcpu does a pause loop exit
265 * or cpu relax intercepted.
266 * dy_eligible: indicates whether vcpu is eligible for directed yield.
274 struct kvm_vcpu_arch arch
;
277 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu
*vcpu
)
279 return cmpxchg(&vcpu
->mode
, IN_GUEST_MODE
, EXITING_GUEST_MODE
);
283 * Some of the bitops functions do not support too long bitmaps.
284 * This number must be determined not to exceed such limits.
286 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
288 struct kvm_memory_slot
{
290 unsigned long npages
;
291 unsigned long *dirty_bitmap
;
292 struct kvm_arch_memory_slot arch
;
293 unsigned long userspace_addr
;
298 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot
*memslot
)
300 return ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
303 struct kvm_s390_adapter_int
{
311 struct kvm_kernel_irq_routing_entry
{
314 int (*set
)(struct kvm_kernel_irq_routing_entry
*e
,
315 struct kvm
*kvm
, int irq_source_id
, int level
,
323 struct kvm_s390_adapter_int adapter
;
325 struct hlist_node link
;
328 struct kvm_irq_routing_table
;
330 #ifndef KVM_PRIVATE_MEM_SLOTS
331 #define KVM_PRIVATE_MEM_SLOTS 0
334 #ifndef KVM_MEM_SLOTS_NUM
335 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
340 * memslots are not sorted by id anymore, please use id_to_memslot()
341 * to get the memslot by its id.
343 struct kvm_memslots
{
345 struct kvm_memory_slot memslots
[KVM_MEM_SLOTS_NUM
];
346 /* The mapping table from slot id to the index in memslots[]. */
347 short id_to_index
[KVM_MEM_SLOTS_NUM
];
352 struct mutex slots_lock
;
353 struct mm_struct
*mm
; /* userspace tied to this vm */
354 struct kvm_memslots
*memslots
;
355 struct srcu_struct srcu
;
356 struct srcu_struct irq_srcu
;
357 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
360 struct kvm_vcpu
*vcpus
[KVM_MAX_VCPUS
];
361 atomic_t online_vcpus
;
362 int last_boosted_vcpu
;
363 struct list_head vm_list
;
365 struct kvm_io_bus
*buses
[KVM_NR_BUSES
];
366 #ifdef CONFIG_HAVE_KVM_EVENTFD
369 struct list_head items
;
370 struct list_head resampler_list
;
371 struct mutex resampler_lock
;
373 struct list_head ioeventfds
;
375 struct kvm_vm_stat stat
;
376 struct kvm_arch arch
;
377 atomic_t users_count
;
378 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
379 struct kvm_coalesced_mmio_ring
*coalesced_mmio_ring
;
380 spinlock_t ring_lock
;
381 struct list_head coalesced_zones
;
384 struct mutex irq_lock
;
385 #ifdef CONFIG_HAVE_KVM_IRQCHIP
387 * Update side is protected by irq_lock.
389 struct kvm_irq_routing_table __rcu
*irq_routing
;
390 struct hlist_head mask_notifier_list
;
392 #ifdef CONFIG_HAVE_KVM_IRQFD
393 struct hlist_head irq_ack_notifier_list
;
396 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
397 struct mmu_notifier mmu_notifier
;
398 unsigned long mmu_notifier_seq
;
399 long mmu_notifier_count
;
402 struct list_head devices
;
405 #define kvm_err(fmt, ...) \
406 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
407 #define kvm_info(fmt, ...) \
408 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
409 #define kvm_debug(fmt, ...) \
410 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
411 #define kvm_pr_unimpl(fmt, ...) \
412 pr_err_ratelimited("kvm [%i]: " fmt, \
413 task_tgid_nr(current), ## __VA_ARGS__)
415 /* The guest did something we don't support. */
416 #define vcpu_unimpl(vcpu, fmt, ...) \
417 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
419 static inline struct kvm_vcpu
*kvm_get_vcpu(struct kvm
*kvm
, int i
)
422 return kvm
->vcpus
[i
];
425 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
427 idx < atomic_read(&kvm->online_vcpus) && \
428 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
431 #define kvm_for_each_memslot(memslot, slots) \
432 for (memslot = &slots->memslots[0]; \
433 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
436 int kvm_vcpu_init(struct kvm_vcpu
*vcpu
, struct kvm
*kvm
, unsigned id
);
437 void kvm_vcpu_uninit(struct kvm_vcpu
*vcpu
);
439 int __must_check
vcpu_load(struct kvm_vcpu
*vcpu
);
440 void vcpu_put(struct kvm_vcpu
*vcpu
);
442 #ifdef CONFIG_HAVE_KVM_IRQFD
443 int kvm_irqfd_init(void);
444 void kvm_irqfd_exit(void);
446 static inline int kvm_irqfd_init(void)
451 static inline void kvm_irqfd_exit(void)
455 int kvm_init(void *opaque
, unsigned vcpu_size
, unsigned vcpu_align
,
456 struct module
*module
);
459 void kvm_get_kvm(struct kvm
*kvm
);
460 void kvm_put_kvm(struct kvm
*kvm
);
462 static inline struct kvm_memslots
*kvm_memslots(struct kvm
*kvm
)
464 return rcu_dereference_check(kvm
->memslots
,
465 srcu_read_lock_held(&kvm
->srcu
)
466 || lockdep_is_held(&kvm
->slots_lock
));
469 static inline struct kvm_memory_slot
*
470 id_to_memslot(struct kvm_memslots
*slots
, int id
)
472 int index
= slots
->id_to_index
[id
];
473 struct kvm_memory_slot
*slot
;
475 slot
= &slots
->memslots
[index
];
477 WARN_ON(slot
->id
!= id
);
482 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
483 * - create a new memory slot
484 * - delete an existing memory slot
485 * - modify an existing memory slot
486 * -- move it in the guest physical memory space
487 * -- just change its flags
489 * Since flags can be changed by some of these operations, the following
490 * differentiation is the best we can do for __kvm_set_memory_region():
499 int kvm_set_memory_region(struct kvm
*kvm
,
500 struct kvm_userspace_memory_region
*mem
);
501 int __kvm_set_memory_region(struct kvm
*kvm
,
502 struct kvm_userspace_memory_region
*mem
);
503 void kvm_arch_free_memslot(struct kvm
*kvm
, struct kvm_memory_slot
*free
,
504 struct kvm_memory_slot
*dont
);
505 int kvm_arch_create_memslot(struct kvm
*kvm
, struct kvm_memory_slot
*slot
,
506 unsigned long npages
);
507 void kvm_arch_memslots_updated(struct kvm
*kvm
);
508 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
509 struct kvm_memory_slot
*memslot
,
510 struct kvm_userspace_memory_region
*mem
,
511 enum kvm_mr_change change
);
512 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
513 struct kvm_userspace_memory_region
*mem
,
514 const struct kvm_memory_slot
*old
,
515 enum kvm_mr_change change
);
516 bool kvm_largepages_enabled(void);
517 void kvm_disable_largepages(void);
518 /* flush all memory translations */
519 void kvm_arch_flush_shadow_all(struct kvm
*kvm
);
520 /* flush memory translations pointing to 'slot' */
521 void kvm_arch_flush_shadow_memslot(struct kvm
*kvm
,
522 struct kvm_memory_slot
*slot
);
524 int gfn_to_page_many_atomic(struct kvm
*kvm
, gfn_t gfn
, struct page
**pages
,
527 struct page
*gfn_to_page(struct kvm
*kvm
, gfn_t gfn
);
528 unsigned long gfn_to_hva(struct kvm
*kvm
, gfn_t gfn
);
529 unsigned long gfn_to_hva_prot(struct kvm
*kvm
, gfn_t gfn
, bool *writable
);
530 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
531 void kvm_release_page_clean(struct page
*page
);
532 void kvm_release_page_dirty(struct page
*page
);
533 void kvm_set_page_accessed(struct page
*page
);
535 pfn_t
gfn_to_pfn_atomic(struct kvm
*kvm
, gfn_t gfn
);
536 pfn_t
gfn_to_pfn_async(struct kvm
*kvm
, gfn_t gfn
, bool *async
,
537 bool write_fault
, bool *writable
);
538 pfn_t
gfn_to_pfn(struct kvm
*kvm
, gfn_t gfn
);
539 pfn_t
gfn_to_pfn_prot(struct kvm
*kvm
, gfn_t gfn
, bool write_fault
,
541 pfn_t
gfn_to_pfn_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
542 pfn_t
gfn_to_pfn_memslot_atomic(struct kvm_memory_slot
*slot
, gfn_t gfn
);
544 void kvm_release_pfn_clean(pfn_t pfn
);
545 void kvm_set_pfn_dirty(pfn_t pfn
);
546 void kvm_set_pfn_accessed(pfn_t pfn
);
547 void kvm_get_pfn(pfn_t pfn
);
549 int kvm_read_guest_page(struct kvm
*kvm
, gfn_t gfn
, void *data
, int offset
,
551 int kvm_read_guest_atomic(struct kvm
*kvm
, gpa_t gpa
, void *data
,
553 int kvm_read_guest(struct kvm
*kvm
, gpa_t gpa
, void *data
, unsigned long len
);
554 int kvm_read_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
555 void *data
, unsigned long len
);
556 int kvm_write_guest_page(struct kvm
*kvm
, gfn_t gfn
, const void *data
,
557 int offset
, int len
);
558 int kvm_write_guest(struct kvm
*kvm
, gpa_t gpa
, const void *data
,
560 int kvm_write_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
561 void *data
, unsigned long len
);
562 int kvm_gfn_to_hva_cache_init(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
563 gpa_t gpa
, unsigned long len
);
564 int kvm_clear_guest_page(struct kvm
*kvm
, gfn_t gfn
, int offset
, int len
);
565 int kvm_clear_guest(struct kvm
*kvm
, gpa_t gpa
, unsigned long len
);
566 struct kvm_memory_slot
*gfn_to_memslot(struct kvm
*kvm
, gfn_t gfn
);
567 int kvm_is_visible_gfn(struct kvm
*kvm
, gfn_t gfn
);
568 unsigned long kvm_host_page_size(struct kvm
*kvm
, gfn_t gfn
);
569 void mark_page_dirty(struct kvm
*kvm
, gfn_t gfn
);
571 void kvm_vcpu_block(struct kvm_vcpu
*vcpu
);
572 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
573 int kvm_vcpu_yield_to(struct kvm_vcpu
*target
);
574 void kvm_vcpu_on_spin(struct kvm_vcpu
*vcpu
);
575 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
);
576 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
);
578 void kvm_flush_remote_tlbs(struct kvm
*kvm
);
579 void kvm_reload_remote_mmus(struct kvm
*kvm
);
580 void kvm_make_mclock_inprogress_request(struct kvm
*kvm
);
581 void kvm_make_scan_ioapic_request(struct kvm
*kvm
);
583 long kvm_arch_dev_ioctl(struct file
*filp
,
584 unsigned int ioctl
, unsigned long arg
);
585 long kvm_arch_vcpu_ioctl(struct file
*filp
,
586 unsigned int ioctl
, unsigned long arg
);
587 int kvm_arch_vcpu_fault(struct kvm_vcpu
*vcpu
, struct vm_fault
*vmf
);
589 int kvm_vm_ioctl_check_extension(struct kvm
*kvm
, long ext
);
591 int kvm_get_dirty_log(struct kvm
*kvm
,
592 struct kvm_dirty_log
*log
, int *is_dirty
);
593 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
594 struct kvm_dirty_log
*log
);
596 int kvm_vm_ioctl_irq_line(struct kvm
*kvm
, struct kvm_irq_level
*irq_level
,
598 long kvm_arch_vm_ioctl(struct file
*filp
,
599 unsigned int ioctl
, unsigned long arg
);
601 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
602 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
604 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
605 struct kvm_translation
*tr
);
607 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
608 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
609 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
610 struct kvm_sregs
*sregs
);
611 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
612 struct kvm_sregs
*sregs
);
613 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
614 struct kvm_mp_state
*mp_state
);
615 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
616 struct kvm_mp_state
*mp_state
);
617 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
618 struct kvm_guest_debug
*dbg
);
619 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
);
621 int kvm_arch_init(void *opaque
);
622 void kvm_arch_exit(void);
624 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
);
625 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
);
627 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
);
628 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
);
629 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
);
630 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
, unsigned int id
);
631 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
);
632 int kvm_arch_vcpu_postcreate(struct kvm_vcpu
*vcpu
);
633 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
);
635 int kvm_arch_hardware_enable(void *garbage
);
636 void kvm_arch_hardware_disable(void *garbage
);
637 int kvm_arch_hardware_setup(void);
638 void kvm_arch_hardware_unsetup(void);
639 void kvm_arch_check_processor_compat(void *rtn
);
640 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
);
641 int kvm_arch_vcpu_should_kick(struct kvm_vcpu
*vcpu
);
643 void *kvm_kvzalloc(unsigned long size
);
644 void kvm_kvfree(const void *addr
);
646 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
647 static inline struct kvm
*kvm_arch_alloc_vm(void)
649 return kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
652 static inline void kvm_arch_free_vm(struct kvm
*kvm
)
658 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
659 void kvm_arch_register_noncoherent_dma(struct kvm
*kvm
);
660 void kvm_arch_unregister_noncoherent_dma(struct kvm
*kvm
);
661 bool kvm_arch_has_noncoherent_dma(struct kvm
*kvm
);
663 static inline void kvm_arch_register_noncoherent_dma(struct kvm
*kvm
)
667 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm
*kvm
)
671 static inline bool kvm_arch_has_noncoherent_dma(struct kvm
*kvm
)
677 static inline wait_queue_head_t
*kvm_arch_vcpu_wq(struct kvm_vcpu
*vcpu
)
679 #ifdef __KVM_HAVE_ARCH_WQP
680 return vcpu
->arch
.wqp
;
686 int kvm_arch_init_vm(struct kvm
*kvm
, unsigned long type
);
687 void kvm_arch_destroy_vm(struct kvm
*kvm
);
688 void kvm_arch_sync_events(struct kvm
*kvm
);
690 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
);
691 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
693 bool kvm_is_mmio_pfn(pfn_t pfn
);
695 struct kvm_irq_ack_notifier
{
696 struct hlist_node link
;
698 void (*irq_acked
)(struct kvm_irq_ack_notifier
*kian
);
701 struct kvm_assigned_dev_kernel
{
702 struct kvm_irq_ack_notifier ack_notifier
;
703 struct list_head list
;
708 unsigned int entries_nr
;
710 bool host_irq_disabled
;
712 struct msix_entry
*host_msix_entries
;
714 struct msix_entry
*guest_msix_entries
;
715 unsigned long irq_requested_type
;
720 spinlock_t intx_lock
;
721 spinlock_t intx_mask_lock
;
723 struct pci_saved_state
*pci_saved_state
;
726 struct kvm_irq_mask_notifier
{
727 void (*func
)(struct kvm_irq_mask_notifier
*kimn
, bool masked
);
729 struct hlist_node link
;
732 void kvm_register_irq_mask_notifier(struct kvm
*kvm
, int irq
,
733 struct kvm_irq_mask_notifier
*kimn
);
734 void kvm_unregister_irq_mask_notifier(struct kvm
*kvm
, int irq
,
735 struct kvm_irq_mask_notifier
*kimn
);
736 void kvm_fire_mask_notifiers(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
,
739 int kvm_irq_map_gsi(struct kvm
*kvm
,
740 struct kvm_kernel_irq_routing_entry
*entries
, int gsi
);
741 int kvm_irq_map_chip_pin(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
743 int kvm_set_irq(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
,
745 int kvm_set_irq_inatomic(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
);
746 int kvm_set_msi(struct kvm_kernel_irq_routing_entry
*irq_entry
, struct kvm
*kvm
,
747 int irq_source_id
, int level
, bool line_status
);
748 bool kvm_irq_has_notifier(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
749 void kvm_notify_acked_irq(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
750 void kvm_register_irq_ack_notifier(struct kvm
*kvm
,
751 struct kvm_irq_ack_notifier
*kian
);
752 void kvm_unregister_irq_ack_notifier(struct kvm
*kvm
,
753 struct kvm_irq_ack_notifier
*kian
);
754 int kvm_request_irq_source_id(struct kvm
*kvm
);
755 void kvm_free_irq_source_id(struct kvm
*kvm
, int irq_source_id
);
757 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
758 int kvm_iommu_map_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
759 void kvm_iommu_unmap_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
760 int kvm_iommu_map_guest(struct kvm
*kvm
);
761 int kvm_iommu_unmap_guest(struct kvm
*kvm
);
762 int kvm_assign_device(struct kvm
*kvm
,
763 struct kvm_assigned_dev_kernel
*assigned_dev
);
764 int kvm_deassign_device(struct kvm
*kvm
,
765 struct kvm_assigned_dev_kernel
*assigned_dev
);
767 static inline int kvm_iommu_map_pages(struct kvm
*kvm
,
768 struct kvm_memory_slot
*slot
)
773 static inline void kvm_iommu_unmap_pages(struct kvm
*kvm
,
774 struct kvm_memory_slot
*slot
)
778 static inline int kvm_iommu_unmap_guest(struct kvm
*kvm
)
784 static inline void kvm_guest_enter(void)
788 BUG_ON(preemptible());
790 local_irq_save(flags
);
792 local_irq_restore(flags
);
794 /* KVM does not hold any references to rcu protected data when it
795 * switches CPU into a guest mode. In fact switching to a guest mode
796 * is very similar to exiting to userspace from rcu point of view. In
797 * addition CPU may stay in a guest mode for quite a long time (up to
798 * one time slice). Lets treat guest mode as quiescent state, just like
799 * we do with user-mode execution.
801 rcu_virt_note_context_switch(smp_processor_id());
804 static inline void kvm_guest_exit(void)
808 local_irq_save(flags
);
810 local_irq_restore(flags
);
814 * search_memslots() and __gfn_to_memslot() are here because they are
815 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
816 * gfn_to_memslot() itself isn't here as an inline because that would
817 * bloat other code too much.
819 static inline struct kvm_memory_slot
*
820 search_memslots(struct kvm_memslots
*slots
, gfn_t gfn
)
822 struct kvm_memory_slot
*memslot
;
824 kvm_for_each_memslot(memslot
, slots
)
825 if (gfn
>= memslot
->base_gfn
&&
826 gfn
< memslot
->base_gfn
+ memslot
->npages
)
832 static inline struct kvm_memory_slot
*
833 __gfn_to_memslot(struct kvm_memslots
*slots
, gfn_t gfn
)
835 return search_memslots(slots
, gfn
);
838 static inline unsigned long
839 __gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
)
841 return slot
->userspace_addr
+ (gfn
- slot
->base_gfn
) * PAGE_SIZE
;
844 static inline int memslot_id(struct kvm
*kvm
, gfn_t gfn
)
846 return gfn_to_memslot(kvm
, gfn
)->id
;
850 hva_to_gfn_memslot(unsigned long hva
, struct kvm_memory_slot
*slot
)
852 gfn_t gfn_offset
= (hva
- slot
->userspace_addr
) >> PAGE_SHIFT
;
854 return slot
->base_gfn
+ gfn_offset
;
857 static inline gpa_t
gfn_to_gpa(gfn_t gfn
)
859 return (gpa_t
)gfn
<< PAGE_SHIFT
;
862 static inline gfn_t
gpa_to_gfn(gpa_t gpa
)
864 return (gfn_t
)(gpa
>> PAGE_SHIFT
);
867 static inline hpa_t
pfn_to_hpa(pfn_t pfn
)
869 return (hpa_t
)pfn
<< PAGE_SHIFT
;
872 static inline bool kvm_is_error_gpa(struct kvm
*kvm
, gpa_t gpa
)
874 unsigned long hva
= gfn_to_hva(kvm
, gpa_to_gfn(gpa
));
876 return kvm_is_error_hva(hva
);
879 static inline void kvm_migrate_timers(struct kvm_vcpu
*vcpu
)
881 set_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
);
889 struct kvm_stats_debugfs_item
{
892 enum kvm_stat_kind kind
;
893 struct dentry
*dentry
;
895 extern struct kvm_stats_debugfs_item debugfs_entries
[];
896 extern struct dentry
*kvm_debugfs_dir
;
898 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
899 static inline int mmu_notifier_retry(struct kvm
*kvm
, unsigned long mmu_seq
)
901 if (unlikely(kvm
->mmu_notifier_count
))
904 * Ensure the read of mmu_notifier_count happens before the read
905 * of mmu_notifier_seq. This interacts with the smp_wmb() in
906 * mmu_notifier_invalidate_range_end to make sure that the caller
907 * either sees the old (non-zero) value of mmu_notifier_count or
908 * the new (incremented) value of mmu_notifier_seq.
909 * PowerPC Book3s HV KVM calls this under a per-page lock
910 * rather than under kvm->mmu_lock, for scalability, so
911 * can't rely on kvm->mmu_lock to keep things ordered.
914 if (kvm
->mmu_notifier_seq
!= mmu_seq
)
920 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
923 #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that...
925 #define KVM_MAX_IRQ_ROUTES 1024
928 int kvm_setup_default_irq_routing(struct kvm
*kvm
);
929 int kvm_set_irq_routing(struct kvm
*kvm
,
930 const struct kvm_irq_routing_entry
*entries
,
933 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry
*e
,
934 const struct kvm_irq_routing_entry
*ue
);
935 void kvm_free_irq_routing(struct kvm
*kvm
);
939 static inline void kvm_free_irq_routing(struct kvm
*kvm
) {}
943 int kvm_send_userspace_msi(struct kvm
*kvm
, struct kvm_msi
*msi
);
945 #ifdef CONFIG_HAVE_KVM_EVENTFD
947 void kvm_eventfd_init(struct kvm
*kvm
);
948 int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
);
950 #ifdef CONFIG_HAVE_KVM_IRQFD
951 int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
);
952 void kvm_irqfd_release(struct kvm
*kvm
);
953 void kvm_irq_routing_update(struct kvm
*);
955 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
960 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
965 static inline void kvm_eventfd_init(struct kvm
*kvm
) {}
967 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
972 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
974 #ifdef CONFIG_HAVE_KVM_IRQCHIP
975 static inline void kvm_irq_routing_update(struct kvm
*kvm
)
980 static inline int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
)
985 #endif /* CONFIG_HAVE_KVM_EVENTFD */
987 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
988 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu
*vcpu
)
990 return vcpu
->kvm
->bsp_vcpu_id
== vcpu
->vcpu_id
;
993 bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
);
997 static inline bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
) { return true; }
1001 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
1003 long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
1006 void kvm_free_all_assigned_devices(struct kvm
*kvm
);
1010 static inline long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
1016 static inline void kvm_free_all_assigned_devices(struct kvm
*kvm
) {}
1020 static inline void kvm_make_request(int req
, struct kvm_vcpu
*vcpu
)
1022 set_bit(req
, &vcpu
->requests
);
1025 static inline bool kvm_check_request(int req
, struct kvm_vcpu
*vcpu
)
1027 if (test_bit(req
, &vcpu
->requests
)) {
1028 clear_bit(req
, &vcpu
->requests
);
1035 extern bool kvm_rebooting
;
1037 struct kvm_device_ops
;
1040 struct kvm_device_ops
*ops
;
1043 struct list_head vm_node
;
1046 /* create, destroy, and name are mandatory */
1047 struct kvm_device_ops
{
1049 int (*create
)(struct kvm_device
*dev
, u32 type
);
1052 * Destroy is responsible for freeing dev.
1054 * Destroy may be called before or after destructors are called
1055 * on emulated I/O regions, depending on whether a reference is
1056 * held by a vcpu or other kvm component that gets destroyed
1057 * after the emulated I/O.
1059 void (*destroy
)(struct kvm_device
*dev
);
1061 int (*set_attr
)(struct kvm_device
*dev
, struct kvm_device_attr
*attr
);
1062 int (*get_attr
)(struct kvm_device
*dev
, struct kvm_device_attr
*attr
);
1063 int (*has_attr
)(struct kvm_device
*dev
, struct kvm_device_attr
*attr
);
1064 long (*ioctl
)(struct kvm_device
*dev
, unsigned int ioctl
,
1068 void kvm_device_get(struct kvm_device
*dev
);
1069 void kvm_device_put(struct kvm_device
*dev
);
1070 struct kvm_device
*kvm_device_from_filp(struct file
*filp
);
1072 extern struct kvm_device_ops kvm_mpic_ops
;
1073 extern struct kvm_device_ops kvm_xics_ops
;
1074 extern struct kvm_device_ops kvm_vfio_ops
;
1075 extern struct kvm_device_ops kvm_arm_vgic_v2_ops
;
1076 extern struct kvm_device_ops kvm_flic_ops
;
1078 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1080 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
1082 vcpu
->spin_loop
.in_spin_loop
= val
;
1084 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
1086 vcpu
->spin_loop
.dy_eligible
= val
;
1089 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1091 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
1095 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
1098 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */