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 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
38 * in kvm, other bits are visible for userspace which are defined in
39 * include/linux/kvm_h.
41 #define KVM_MEMSLOT_INVALID (1UL << 16)
42 #define KVM_MEMSLOT_INCOHERENT (1UL << 17)
44 /* Two fragments for cross MMIO pages. */
45 #define KVM_MAX_MMIO_FRAGMENTS 2
48 * For the normal pfn, the highest 12 bits should be zero,
49 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
50 * mask bit 63 to indicate the noslot pfn.
52 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
53 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
54 #define KVM_PFN_NOSLOT (0x1ULL << 63)
56 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
57 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
58 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
61 * error pfns indicate that the gfn is in slot but faild to
62 * translate it to pfn on host.
64 static inline bool is_error_pfn(pfn_t pfn
)
66 return !!(pfn
& KVM_PFN_ERR_MASK
);
70 * error_noslot pfns indicate that the gfn can not be
71 * translated to pfn - it is not in slot or failed to
72 * translate it to pfn.
74 static inline bool is_error_noslot_pfn(pfn_t pfn
)
76 return !!(pfn
& KVM_PFN_ERR_NOSLOT_MASK
);
79 /* noslot pfn indicates that the gfn is not in slot. */
80 static inline bool is_noslot_pfn(pfn_t pfn
)
82 return pfn
== KVM_PFN_NOSLOT
;
86 * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390)
87 * provide own defines and kvm_is_error_hva
89 #ifndef KVM_HVA_ERR_BAD
91 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
92 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
94 static inline bool kvm_is_error_hva(unsigned long addr
)
96 return addr
>= PAGE_OFFSET
;
101 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
103 static inline bool is_error_page(struct page
*page
)
109 * vcpu->requests bit members
111 #define KVM_REQ_TLB_FLUSH 0
112 #define KVM_REQ_MIGRATE_TIMER 1
113 #define KVM_REQ_REPORT_TPR_ACCESS 2
114 #define KVM_REQ_MMU_RELOAD 3
115 #define KVM_REQ_TRIPLE_FAULT 4
116 #define KVM_REQ_PENDING_TIMER 5
117 #define KVM_REQ_UNHALT 6
118 #define KVM_REQ_MMU_SYNC 7
119 #define KVM_REQ_CLOCK_UPDATE 8
120 #define KVM_REQ_KICK 9
121 #define KVM_REQ_DEACTIVATE_FPU 10
122 #define KVM_REQ_EVENT 11
123 #define KVM_REQ_APF_HALT 12
124 #define KVM_REQ_STEAL_UPDATE 13
125 #define KVM_REQ_NMI 14
126 #define KVM_REQ_PMU 15
127 #define KVM_REQ_PMI 16
128 #define KVM_REQ_WATCHDOG 17
129 #define KVM_REQ_MASTERCLOCK_UPDATE 18
130 #define KVM_REQ_MCLOCK_INPROGRESS 19
131 #define KVM_REQ_EPR_EXIT 20
132 #define KVM_REQ_SCAN_IOAPIC 21
133 #define KVM_REQ_GLOBAL_CLOCK_UPDATE 22
134 #define KVM_REQ_ENABLE_IBS 23
135 #define KVM_REQ_DISABLE_IBS 24
136 #define KVM_REQ_APIC_PAGE_RELOAD 25
138 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
139 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
141 extern struct kmem_cache
*kvm_vcpu_cache
;
143 extern spinlock_t kvm_lock
;
144 extern struct list_head vm_list
;
146 struct kvm_io_range
{
149 struct kvm_io_device
*dev
;
152 #define NR_IOBUS_DEVS 1000
157 struct kvm_io_range range
[];
163 KVM_VIRTIO_CCW_NOTIFY_BUS
,
168 int kvm_io_bus_write(struct kvm_vcpu
*vcpu
, enum kvm_bus bus_idx
, gpa_t addr
,
169 int len
, const void *val
);
170 int kvm_io_bus_write_cookie(struct kvm_vcpu
*vcpu
, enum kvm_bus bus_idx
,
171 gpa_t addr
, int len
, const void *val
, long cookie
);
172 int kvm_io_bus_read(struct kvm_vcpu
*vcpu
, enum kvm_bus bus_idx
, gpa_t addr
,
174 int kvm_io_bus_register_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
175 int len
, struct kvm_io_device
*dev
);
176 int kvm_io_bus_unregister_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
,
177 struct kvm_io_device
*dev
);
179 #ifdef CONFIG_KVM_ASYNC_PF
180 struct kvm_async_pf
{
181 struct work_struct work
;
182 struct list_head link
;
183 struct list_head queue
;
184 struct kvm_vcpu
*vcpu
;
185 struct mm_struct
*mm
;
188 struct kvm_arch_async_pf arch
;
192 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu
*vcpu
);
193 void kvm_check_async_pf_completion(struct kvm_vcpu
*vcpu
);
194 int kvm_setup_async_pf(struct kvm_vcpu
*vcpu
, gva_t gva
, unsigned long hva
,
195 struct kvm_arch_async_pf
*arch
);
196 int kvm_async_pf_wakeup_all(struct kvm_vcpu
*vcpu
);
203 READING_SHADOW_PAGE_TABLES
,
207 * Sometimes a large or cross-page mmio needs to be broken up into separate
208 * exits for userspace servicing.
210 struct kvm_mmio_fragment
{
218 #ifdef CONFIG_PREEMPT_NOTIFIERS
219 struct preempt_notifier preempt_notifier
;
225 unsigned long requests
;
226 unsigned long guest_debug
;
232 int guest_fpu_loaded
, guest_xcr0_loaded
;
233 wait_queue_head_t wq
;
237 struct kvm_vcpu_stat stat
;
239 #ifdef CONFIG_HAS_IOMEM
241 int mmio_read_completed
;
243 int mmio_cur_fragment
;
244 int mmio_nr_fragments
;
245 struct kvm_mmio_fragment mmio_fragments
[KVM_MAX_MMIO_FRAGMENTS
];
248 #ifdef CONFIG_KVM_ASYNC_PF
251 struct list_head queue
;
252 struct list_head done
;
257 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
259 * Cpu relax intercept or pause loop exit optimization
260 * in_spin_loop: set when a vcpu does a pause loop exit
261 * or cpu relax intercepted.
262 * dy_eligible: indicates whether vcpu is eligible for directed yield.
270 struct kvm_vcpu_arch arch
;
273 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu
*vcpu
)
275 return cmpxchg(&vcpu
->mode
, IN_GUEST_MODE
, EXITING_GUEST_MODE
);
279 * Some of the bitops functions do not support too long bitmaps.
280 * This number must be determined not to exceed such limits.
282 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
284 struct kvm_memory_slot
{
286 unsigned long npages
;
287 unsigned long *dirty_bitmap
;
288 struct kvm_arch_memory_slot arch
;
289 unsigned long userspace_addr
;
294 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot
*memslot
)
296 return ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
299 struct kvm_s390_adapter_int
{
307 struct kvm_kernel_irq_routing_entry
{
310 int (*set
)(struct kvm_kernel_irq_routing_entry
*e
,
311 struct kvm
*kvm
, int irq_source_id
, int level
,
319 struct kvm_s390_adapter_int adapter
;
321 struct hlist_node link
;
324 #ifndef KVM_PRIVATE_MEM_SLOTS
325 #define KVM_PRIVATE_MEM_SLOTS 0
328 #ifndef KVM_MEM_SLOTS_NUM
329 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
334 * memslots are not sorted by id anymore, please use id_to_memslot()
335 * to get the memslot by its id.
337 struct kvm_memslots
{
339 struct kvm_memory_slot memslots
[KVM_MEM_SLOTS_NUM
];
340 /* The mapping table from slot id to the index in memslots[]. */
341 short id_to_index
[KVM_MEM_SLOTS_NUM
];
348 struct mutex slots_lock
;
349 struct mm_struct
*mm
; /* userspace tied to this vm */
350 struct kvm_memslots
*memslots
;
351 struct srcu_struct srcu
;
352 struct srcu_struct irq_srcu
;
353 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
356 struct kvm_vcpu
*vcpus
[KVM_MAX_VCPUS
];
357 atomic_t online_vcpus
;
358 int last_boosted_vcpu
;
359 struct list_head vm_list
;
361 struct kvm_io_bus
*buses
[KVM_NR_BUSES
];
362 #ifdef CONFIG_HAVE_KVM_EVENTFD
365 struct list_head items
;
366 struct list_head resampler_list
;
367 struct mutex resampler_lock
;
369 struct list_head ioeventfds
;
371 struct kvm_vm_stat stat
;
372 struct kvm_arch arch
;
373 atomic_t users_count
;
374 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
375 struct kvm_coalesced_mmio_ring
*coalesced_mmio_ring
;
376 spinlock_t ring_lock
;
377 struct list_head coalesced_zones
;
380 struct mutex irq_lock
;
381 #ifdef CONFIG_HAVE_KVM_IRQCHIP
383 * Update side is protected by irq_lock.
385 struct kvm_irq_routing_table __rcu
*irq_routing
;
387 #ifdef CONFIG_HAVE_KVM_IRQFD
388 struct hlist_head irq_ack_notifier_list
;
391 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
392 struct mmu_notifier mmu_notifier
;
393 unsigned long mmu_notifier_seq
;
394 long mmu_notifier_count
;
397 struct list_head devices
;
400 #define kvm_err(fmt, ...) \
401 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
402 #define kvm_info(fmt, ...) \
403 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
404 #define kvm_debug(fmt, ...) \
405 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
406 #define kvm_pr_unimpl(fmt, ...) \
407 pr_err_ratelimited("kvm [%i]: " fmt, \
408 task_tgid_nr(current), ## __VA_ARGS__)
410 /* The guest did something we don't support. */
411 #define vcpu_unimpl(vcpu, fmt, ...) \
412 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
414 static inline struct kvm_vcpu
*kvm_get_vcpu(struct kvm
*kvm
, int i
)
417 return kvm
->vcpus
[i
];
420 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
422 idx < atomic_read(&kvm->online_vcpus) && \
423 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
426 #define kvm_for_each_memslot(memslot, slots) \
427 for (memslot = &slots->memslots[0]; \
428 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
431 int kvm_vcpu_init(struct kvm_vcpu
*vcpu
, struct kvm
*kvm
, unsigned id
);
432 void kvm_vcpu_uninit(struct kvm_vcpu
*vcpu
);
434 int __must_check
vcpu_load(struct kvm_vcpu
*vcpu
);
435 void vcpu_put(struct kvm_vcpu
*vcpu
);
437 #ifdef __KVM_HAVE_IOAPIC
438 void kvm_vcpu_request_scan_ioapic(struct kvm
*kvm
);
440 static inline void kvm_vcpu_request_scan_ioapic(struct kvm
*kvm
)
445 #ifdef CONFIG_HAVE_KVM_IRQFD
446 int kvm_irqfd_init(void);
447 void kvm_irqfd_exit(void);
449 static inline int kvm_irqfd_init(void)
454 static inline void kvm_irqfd_exit(void)
458 int kvm_init(void *opaque
, unsigned vcpu_size
, unsigned vcpu_align
,
459 struct module
*module
);
462 void kvm_get_kvm(struct kvm
*kvm
);
463 void kvm_put_kvm(struct kvm
*kvm
);
465 static inline struct kvm_memslots
*kvm_memslots(struct kvm
*kvm
)
467 return rcu_dereference_check(kvm
->memslots
,
468 srcu_read_lock_held(&kvm
->srcu
)
469 || lockdep_is_held(&kvm
->slots_lock
));
472 static inline struct kvm_memory_slot
*
473 id_to_memslot(struct kvm_memslots
*slots
, int id
)
475 int index
= slots
->id_to_index
[id
];
476 struct kvm_memory_slot
*slot
;
478 slot
= &slots
->memslots
[index
];
480 WARN_ON(slot
->id
!= id
);
485 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
486 * - create a new memory slot
487 * - delete an existing memory slot
488 * - modify an existing memory slot
489 * -- move it in the guest physical memory space
490 * -- just change its flags
492 * Since flags can be changed by some of these operations, the following
493 * differentiation is the best we can do for __kvm_set_memory_region():
502 int kvm_set_memory_region(struct kvm
*kvm
,
503 struct kvm_userspace_memory_region
*mem
);
504 int __kvm_set_memory_region(struct kvm
*kvm
,
505 struct kvm_userspace_memory_region
*mem
);
506 void kvm_arch_free_memslot(struct kvm
*kvm
, struct kvm_memory_slot
*free
,
507 struct kvm_memory_slot
*dont
);
508 int kvm_arch_create_memslot(struct kvm
*kvm
, struct kvm_memory_slot
*slot
,
509 unsigned long npages
);
510 void kvm_arch_memslots_updated(struct kvm
*kvm
);
511 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
512 struct kvm_memory_slot
*memslot
,
513 struct kvm_userspace_memory_region
*mem
,
514 enum kvm_mr_change change
);
515 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
516 struct kvm_userspace_memory_region
*mem
,
517 const struct kvm_memory_slot
*old
,
518 enum kvm_mr_change change
);
519 bool kvm_largepages_enabled(void);
520 void kvm_disable_largepages(void);
521 /* flush all memory translations */
522 void kvm_arch_flush_shadow_all(struct kvm
*kvm
);
523 /* flush memory translations pointing to 'slot' */
524 void kvm_arch_flush_shadow_memslot(struct kvm
*kvm
,
525 struct kvm_memory_slot
*slot
);
527 int gfn_to_page_many_atomic(struct kvm
*kvm
, gfn_t gfn
, struct page
**pages
,
530 struct page
*gfn_to_page(struct kvm
*kvm
, gfn_t gfn
);
531 unsigned long gfn_to_hva(struct kvm
*kvm
, gfn_t gfn
);
532 unsigned long gfn_to_hva_prot(struct kvm
*kvm
, gfn_t gfn
, bool *writable
);
533 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
534 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot
*slot
, gfn_t gfn
,
536 void kvm_release_page_clean(struct page
*page
);
537 void kvm_release_page_dirty(struct page
*page
);
538 void kvm_set_page_accessed(struct page
*page
);
540 pfn_t
gfn_to_pfn_atomic(struct kvm
*kvm
, gfn_t gfn
);
541 pfn_t
gfn_to_pfn_async(struct kvm
*kvm
, gfn_t gfn
, bool *async
,
542 bool write_fault
, bool *writable
);
543 pfn_t
gfn_to_pfn(struct kvm
*kvm
, gfn_t gfn
);
544 pfn_t
gfn_to_pfn_prot(struct kvm
*kvm
, gfn_t gfn
, bool write_fault
,
546 pfn_t
gfn_to_pfn_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
547 pfn_t
gfn_to_pfn_memslot_atomic(struct kvm_memory_slot
*slot
, gfn_t gfn
);
549 void kvm_release_pfn_clean(pfn_t pfn
);
550 void kvm_set_pfn_dirty(pfn_t pfn
);
551 void kvm_set_pfn_accessed(pfn_t pfn
);
552 void kvm_get_pfn(pfn_t pfn
);
554 int kvm_read_guest_page(struct kvm
*kvm
, gfn_t gfn
, void *data
, int offset
,
556 int kvm_read_guest_atomic(struct kvm
*kvm
, gpa_t gpa
, void *data
,
558 int kvm_read_guest(struct kvm
*kvm
, gpa_t gpa
, void *data
, unsigned long len
);
559 int kvm_read_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
560 void *data
, unsigned long len
);
561 int kvm_write_guest_page(struct kvm
*kvm
, gfn_t gfn
, const void *data
,
562 int offset
, int len
);
563 int kvm_write_guest(struct kvm
*kvm
, gpa_t gpa
, const void *data
,
565 int kvm_write_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
566 void *data
, unsigned long len
);
567 int kvm_gfn_to_hva_cache_init(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
568 gpa_t gpa
, unsigned long len
);
569 int kvm_clear_guest_page(struct kvm
*kvm
, gfn_t gfn
, int offset
, int len
);
570 int kvm_clear_guest(struct kvm
*kvm
, gpa_t gpa
, unsigned long len
);
571 struct kvm_memory_slot
*gfn_to_memslot(struct kvm
*kvm
, gfn_t gfn
);
572 int kvm_is_visible_gfn(struct kvm
*kvm
, gfn_t gfn
);
573 unsigned long kvm_host_page_size(struct kvm
*kvm
, gfn_t gfn
);
574 void mark_page_dirty(struct kvm
*kvm
, gfn_t gfn
);
576 void kvm_vcpu_block(struct kvm_vcpu
*vcpu
);
577 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
578 int kvm_vcpu_yield_to(struct kvm_vcpu
*target
);
579 void kvm_vcpu_on_spin(struct kvm_vcpu
*vcpu
);
580 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
);
581 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
);
583 void kvm_flush_remote_tlbs(struct kvm
*kvm
);
584 void kvm_reload_remote_mmus(struct kvm
*kvm
);
585 void kvm_make_mclock_inprogress_request(struct kvm
*kvm
);
586 void kvm_make_scan_ioapic_request(struct kvm
*kvm
);
587 bool kvm_make_all_cpus_request(struct kvm
*kvm
, unsigned int req
);
589 long kvm_arch_dev_ioctl(struct file
*filp
,
590 unsigned int ioctl
, unsigned long arg
);
591 long kvm_arch_vcpu_ioctl(struct file
*filp
,
592 unsigned int ioctl
, unsigned long arg
);
593 int kvm_arch_vcpu_fault(struct kvm_vcpu
*vcpu
, struct vm_fault
*vmf
);
595 int kvm_vm_ioctl_check_extension(struct kvm
*kvm
, long ext
);
597 int kvm_get_dirty_log(struct kvm
*kvm
,
598 struct kvm_dirty_log
*log
, int *is_dirty
);
600 int kvm_get_dirty_log_protect(struct kvm
*kvm
,
601 struct kvm_dirty_log
*log
, bool *is_dirty
);
603 void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm
*kvm
,
604 struct kvm_memory_slot
*slot
,
608 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
609 struct kvm_dirty_log
*log
);
611 int kvm_vm_ioctl_irq_line(struct kvm
*kvm
, struct kvm_irq_level
*irq_level
,
613 long kvm_arch_vm_ioctl(struct file
*filp
,
614 unsigned int ioctl
, unsigned long arg
);
616 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
617 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
619 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
620 struct kvm_translation
*tr
);
622 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
623 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
624 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
625 struct kvm_sregs
*sregs
);
626 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
627 struct kvm_sregs
*sregs
);
628 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
629 struct kvm_mp_state
*mp_state
);
630 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
631 struct kvm_mp_state
*mp_state
);
632 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
633 struct kvm_guest_debug
*dbg
);
634 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
);
636 int kvm_arch_init(void *opaque
);
637 void kvm_arch_exit(void);
639 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
);
640 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
);
642 void kvm_arch_sched_in(struct kvm_vcpu
*vcpu
, int cpu
);
644 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
);
645 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
);
646 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
);
647 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
, unsigned int id
);
648 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
);
649 void kvm_arch_vcpu_postcreate(struct kvm_vcpu
*vcpu
);
650 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
);
652 int kvm_arch_hardware_enable(void);
653 void kvm_arch_hardware_disable(void);
654 int kvm_arch_hardware_setup(void);
655 void kvm_arch_hardware_unsetup(void);
656 void kvm_arch_check_processor_compat(void *rtn
);
657 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
);
658 int kvm_arch_vcpu_should_kick(struct kvm_vcpu
*vcpu
);
660 void *kvm_kvzalloc(unsigned long size
);
662 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
663 static inline struct kvm
*kvm_arch_alloc_vm(void)
665 return kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
668 static inline void kvm_arch_free_vm(struct kvm
*kvm
)
674 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
675 void kvm_arch_register_noncoherent_dma(struct kvm
*kvm
);
676 void kvm_arch_unregister_noncoherent_dma(struct kvm
*kvm
);
677 bool kvm_arch_has_noncoherent_dma(struct kvm
*kvm
);
679 static inline void kvm_arch_register_noncoherent_dma(struct kvm
*kvm
)
683 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm
*kvm
)
687 static inline bool kvm_arch_has_noncoherent_dma(struct kvm
*kvm
)
693 static inline wait_queue_head_t
*kvm_arch_vcpu_wq(struct kvm_vcpu
*vcpu
)
695 #ifdef __KVM_HAVE_ARCH_WQP
696 return vcpu
->arch
.wqp
;
702 #ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
704 * returns true if the virtual interrupt controller is initialized and
705 * ready to accept virtual IRQ. On some architectures the virtual interrupt
706 * controller is dynamically instantiated and this is not always true.
708 bool kvm_arch_intc_initialized(struct kvm
*kvm
);
710 static inline bool kvm_arch_intc_initialized(struct kvm
*kvm
)
716 int kvm_arch_init_vm(struct kvm
*kvm
, unsigned long type
);
717 void kvm_arch_destroy_vm(struct kvm
*kvm
);
718 void kvm_arch_sync_events(struct kvm
*kvm
);
720 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
);
721 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
723 bool kvm_is_reserved_pfn(pfn_t pfn
);
725 struct kvm_irq_ack_notifier
{
726 struct hlist_node link
;
728 void (*irq_acked
)(struct kvm_irq_ack_notifier
*kian
);
731 int kvm_irq_map_gsi(struct kvm
*kvm
,
732 struct kvm_kernel_irq_routing_entry
*entries
, int gsi
);
733 int kvm_irq_map_chip_pin(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
735 int kvm_set_irq(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
,
737 int kvm_set_irq_inatomic(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
);
738 int kvm_set_msi(struct kvm_kernel_irq_routing_entry
*irq_entry
, struct kvm
*kvm
,
739 int irq_source_id
, int level
, bool line_status
);
740 bool kvm_irq_has_notifier(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
741 void kvm_notify_acked_irq(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
742 void kvm_register_irq_ack_notifier(struct kvm
*kvm
,
743 struct kvm_irq_ack_notifier
*kian
);
744 void kvm_unregister_irq_ack_notifier(struct kvm
*kvm
,
745 struct kvm_irq_ack_notifier
*kian
);
746 int kvm_request_irq_source_id(struct kvm
*kvm
);
747 void kvm_free_irq_source_id(struct kvm
*kvm
, int irq_source_id
);
749 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
750 int kvm_iommu_map_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
751 void kvm_iommu_unmap_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
753 static inline int kvm_iommu_map_pages(struct kvm
*kvm
,
754 struct kvm_memory_slot
*slot
)
759 static inline void kvm_iommu_unmap_pages(struct kvm
*kvm
,
760 struct kvm_memory_slot
*slot
)
765 static inline void kvm_guest_enter(void)
769 BUG_ON(preemptible());
771 local_irq_save(flags
);
773 local_irq_restore(flags
);
775 /* KVM does not hold any references to rcu protected data when it
776 * switches CPU into a guest mode. In fact switching to a guest mode
777 * is very similar to exiting to userspace from rcu point of view. In
778 * addition CPU may stay in a guest mode for quite a long time (up to
779 * one time slice). Lets treat guest mode as quiescent state, just like
780 * we do with user-mode execution.
782 rcu_virt_note_context_switch(smp_processor_id());
785 static inline void kvm_guest_exit(void)
789 local_irq_save(flags
);
791 local_irq_restore(flags
);
795 * search_memslots() and __gfn_to_memslot() are here because they are
796 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
797 * gfn_to_memslot() itself isn't here as an inline because that would
798 * bloat other code too much.
800 static inline struct kvm_memory_slot
*
801 search_memslots(struct kvm_memslots
*slots
, gfn_t gfn
)
803 int start
= 0, end
= slots
->used_slots
;
804 int slot
= atomic_read(&slots
->lru_slot
);
805 struct kvm_memory_slot
*memslots
= slots
->memslots
;
807 if (gfn
>= memslots
[slot
].base_gfn
&&
808 gfn
< memslots
[slot
].base_gfn
+ memslots
[slot
].npages
)
809 return &memslots
[slot
];
811 while (start
< end
) {
812 slot
= start
+ (end
- start
) / 2;
814 if (gfn
>= memslots
[slot
].base_gfn
)
820 if (gfn
>= memslots
[start
].base_gfn
&&
821 gfn
< memslots
[start
].base_gfn
+ memslots
[start
].npages
) {
822 atomic_set(&slots
->lru_slot
, start
);
823 return &memslots
[start
];
829 static inline struct kvm_memory_slot
*
830 __gfn_to_memslot(struct kvm_memslots
*slots
, gfn_t gfn
)
832 return search_memslots(slots
, gfn
);
835 static inline unsigned long
836 __gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
)
838 return slot
->userspace_addr
+ (gfn
- slot
->base_gfn
) * PAGE_SIZE
;
841 static inline int memslot_id(struct kvm
*kvm
, gfn_t gfn
)
843 return gfn_to_memslot(kvm
, gfn
)->id
;
847 hva_to_gfn_memslot(unsigned long hva
, struct kvm_memory_slot
*slot
)
849 gfn_t gfn_offset
= (hva
- slot
->userspace_addr
) >> PAGE_SHIFT
;
851 return slot
->base_gfn
+ gfn_offset
;
854 static inline gpa_t
gfn_to_gpa(gfn_t gfn
)
856 return (gpa_t
)gfn
<< PAGE_SHIFT
;
859 static inline gfn_t
gpa_to_gfn(gpa_t gpa
)
861 return (gfn_t
)(gpa
>> PAGE_SHIFT
);
864 static inline hpa_t
pfn_to_hpa(pfn_t pfn
)
866 return (hpa_t
)pfn
<< PAGE_SHIFT
;
869 static inline bool kvm_is_error_gpa(struct kvm
*kvm
, gpa_t gpa
)
871 unsigned long hva
= gfn_to_hva(kvm
, gpa_to_gfn(gpa
));
873 return kvm_is_error_hva(hva
);
876 static inline void kvm_migrate_timers(struct kvm_vcpu
*vcpu
)
878 set_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
);
886 struct kvm_stats_debugfs_item
{
889 enum kvm_stat_kind kind
;
890 struct dentry
*dentry
;
892 extern struct kvm_stats_debugfs_item debugfs_entries
[];
893 extern struct dentry
*kvm_debugfs_dir
;
895 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
896 static inline int mmu_notifier_retry(struct kvm
*kvm
, unsigned long mmu_seq
)
898 if (unlikely(kvm
->mmu_notifier_count
))
901 * Ensure the read of mmu_notifier_count happens before the read
902 * of mmu_notifier_seq. This interacts with the smp_wmb() in
903 * mmu_notifier_invalidate_range_end to make sure that the caller
904 * either sees the old (non-zero) value of mmu_notifier_count or
905 * the new (incremented) value of mmu_notifier_seq.
906 * PowerPC Book3s HV KVM calls this under a per-page lock
907 * rather than under kvm->mmu_lock, for scalability, so
908 * can't rely on kvm->mmu_lock to keep things ordered.
911 if (kvm
->mmu_notifier_seq
!= mmu_seq
)
917 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
920 #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that...
922 #define KVM_MAX_IRQ_ROUTES 1024
925 int kvm_setup_default_irq_routing(struct kvm
*kvm
);
926 int kvm_set_irq_routing(struct kvm
*kvm
,
927 const struct kvm_irq_routing_entry
*entries
,
930 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry
*e
,
931 const struct kvm_irq_routing_entry
*ue
);
932 void kvm_free_irq_routing(struct kvm
*kvm
);
936 static inline void kvm_free_irq_routing(struct kvm
*kvm
) {}
940 int kvm_send_userspace_msi(struct kvm
*kvm
, struct kvm_msi
*msi
);
942 #ifdef CONFIG_HAVE_KVM_EVENTFD
944 void kvm_eventfd_init(struct kvm
*kvm
);
945 int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
);
947 #ifdef CONFIG_HAVE_KVM_IRQFD
948 int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
);
949 void kvm_irqfd_release(struct kvm
*kvm
);
950 void kvm_irq_routing_update(struct kvm
*);
952 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
957 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
962 static inline void kvm_eventfd_init(struct kvm
*kvm
) {}
964 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
969 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
971 #ifdef CONFIG_HAVE_KVM_IRQCHIP
972 static inline void kvm_irq_routing_update(struct kvm
*kvm
)
977 static inline int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
)
982 #endif /* CONFIG_HAVE_KVM_EVENTFD */
984 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
985 static inline bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu
*vcpu
)
987 return vcpu
->kvm
->bsp_vcpu_id
== vcpu
->vcpu_id
;
990 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu
*vcpu
)
992 return (vcpu
->arch
.apic_base
& MSR_IA32_APICBASE_BSP
) != 0;
995 bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
);
999 static inline bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
) { return true; }
1003 static inline void kvm_make_request(int req
, struct kvm_vcpu
*vcpu
)
1005 set_bit(req
, &vcpu
->requests
);
1008 static inline bool kvm_check_request(int req
, struct kvm_vcpu
*vcpu
)
1010 if (test_bit(req
, &vcpu
->requests
)) {
1011 clear_bit(req
, &vcpu
->requests
);
1018 extern bool kvm_rebooting
;
1021 struct kvm_device_ops
*ops
;
1024 struct list_head vm_node
;
1027 /* create, destroy, and name are mandatory */
1028 struct kvm_device_ops
{
1030 int (*create
)(struct kvm_device
*dev
, u32 type
);
1033 * Destroy is responsible for freeing dev.
1035 * Destroy may be called before or after destructors are called
1036 * on emulated I/O regions, depending on whether a reference is
1037 * held by a vcpu or other kvm component that gets destroyed
1038 * after the emulated I/O.
1040 void (*destroy
)(struct kvm_device
*dev
);
1042 int (*set_attr
)(struct kvm_device
*dev
, struct kvm_device_attr
*attr
);
1043 int (*get_attr
)(struct kvm_device
*dev
, struct kvm_device_attr
*attr
);
1044 int (*has_attr
)(struct kvm_device
*dev
, struct kvm_device_attr
*attr
);
1045 long (*ioctl
)(struct kvm_device
*dev
, unsigned int ioctl
,
1049 void kvm_device_get(struct kvm_device
*dev
);
1050 void kvm_device_put(struct kvm_device
*dev
);
1051 struct kvm_device
*kvm_device_from_filp(struct file
*filp
);
1052 int kvm_register_device_ops(struct kvm_device_ops
*ops
, u32 type
);
1053 void kvm_unregister_device_ops(u32 type
);
1055 extern struct kvm_device_ops kvm_mpic_ops
;
1056 extern struct kvm_device_ops kvm_xics_ops
;
1057 extern struct kvm_device_ops kvm_arm_vgic_v2_ops
;
1058 extern struct kvm_device_ops kvm_arm_vgic_v3_ops
;
1060 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1062 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
1064 vcpu
->spin_loop
.in_spin_loop
= val
;
1066 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
1068 vcpu
->spin_loop
.dy_eligible
= val
;
1071 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1073 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
1077 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
1080 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */