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 <asm/signal.h>
27 #include <linux/kvm.h>
28 #include <linux/kvm_para.h>
30 #include <linux/kvm_types.h>
32 #include <asm/kvm_host.h>
35 #define KVM_MMIO_SIZE 8
39 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
40 * in kvm, other bits are visible for userspace which are defined in
41 * include/linux/kvm_h.
43 #define KVM_MEMSLOT_INVALID (1UL << 16)
46 * If we support unaligned MMIO, at most one fragment will be split into two:
48 #ifdef KVM_UNALIGNED_MMIO
49 # define KVM_EXTRA_MMIO_FRAGMENTS 1
51 # define KVM_EXTRA_MMIO_FRAGMENTS 0
54 #define KVM_USER_MMIO_SIZE 8
56 #define KVM_MAX_MMIO_FRAGMENTS \
57 (KVM_MMIO_SIZE / KVM_USER_MMIO_SIZE + KVM_EXTRA_MMIO_FRAGMENTS)
60 * For the normal pfn, the highest 12 bits should be zero,
61 * so we can mask these bits to indicate the error.
63 #define KVM_PFN_ERR_MASK (0xfffULL << 52)
65 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
66 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
67 #define KVM_PFN_ERR_BAD (KVM_PFN_ERR_MASK + 2)
68 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 3)
70 static inline bool is_error_pfn(pfn_t pfn
)
72 return !!(pfn
& KVM_PFN_ERR_MASK
);
75 static inline bool is_noslot_pfn(pfn_t pfn
)
77 return pfn
== KVM_PFN_ERR_BAD
;
80 static inline bool is_invalid_pfn(pfn_t pfn
)
82 return !is_noslot_pfn(pfn
) && is_error_pfn(pfn
);
85 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
86 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
88 static inline bool kvm_is_error_hva(unsigned long addr
)
90 return addr
>= PAGE_OFFSET
;
93 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
95 static inline bool is_error_page(struct page
*page
)
101 * vcpu->requests bit members
103 #define KVM_REQ_TLB_FLUSH 0
104 #define KVM_REQ_MIGRATE_TIMER 1
105 #define KVM_REQ_REPORT_TPR_ACCESS 2
106 #define KVM_REQ_MMU_RELOAD 3
107 #define KVM_REQ_TRIPLE_FAULT 4
108 #define KVM_REQ_PENDING_TIMER 5
109 #define KVM_REQ_UNHALT 6
110 #define KVM_REQ_MMU_SYNC 7
111 #define KVM_REQ_CLOCK_UPDATE 8
112 #define KVM_REQ_KICK 9
113 #define KVM_REQ_DEACTIVATE_FPU 10
114 #define KVM_REQ_EVENT 11
115 #define KVM_REQ_APF_HALT 12
116 #define KVM_REQ_STEAL_UPDATE 13
117 #define KVM_REQ_NMI 14
118 #define KVM_REQ_IMMEDIATE_EXIT 15
119 #define KVM_REQ_PMU 16
120 #define KVM_REQ_PMI 17
122 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
123 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
127 extern struct kmem_cache
*kvm_vcpu_cache
;
129 struct kvm_io_range
{
132 struct kvm_io_device
*dev
;
135 #define NR_IOBUS_DEVS 1000
139 struct kvm_io_range range
[];
148 int kvm_io_bus_write(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
149 int len
, const void *val
);
150 int kvm_io_bus_read(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
, int len
,
152 int kvm_io_bus_register_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
153 int len
, struct kvm_io_device
*dev
);
154 int kvm_io_bus_unregister_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
,
155 struct kvm_io_device
*dev
);
157 #ifdef CONFIG_KVM_ASYNC_PF
158 struct kvm_async_pf
{
159 struct work_struct work
;
160 struct list_head link
;
161 struct list_head queue
;
162 struct kvm_vcpu
*vcpu
;
163 struct mm_struct
*mm
;
166 struct kvm_arch_async_pf arch
;
171 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu
*vcpu
);
172 void kvm_check_async_pf_completion(struct kvm_vcpu
*vcpu
);
173 int kvm_setup_async_pf(struct kvm_vcpu
*vcpu
, gva_t gva
, gfn_t gfn
,
174 struct kvm_arch_async_pf
*arch
);
175 int kvm_async_pf_wakeup_all(struct kvm_vcpu
*vcpu
);
182 READING_SHADOW_PAGE_TABLES
,
186 * Sometimes a large or cross-page mmio needs to be broken up into separate
187 * exits for userspace servicing.
189 struct kvm_mmio_fragment
{
197 #ifdef CONFIG_PREEMPT_NOTIFIERS
198 struct preempt_notifier preempt_notifier
;
204 unsigned long requests
;
205 unsigned long guest_debug
;
211 int guest_fpu_loaded
, guest_xcr0_loaded
;
212 wait_queue_head_t wq
;
216 struct kvm_vcpu_stat stat
;
218 #ifdef CONFIG_HAS_IOMEM
220 int mmio_read_completed
;
222 int mmio_cur_fragment
;
223 int mmio_nr_fragments
;
224 struct kvm_mmio_fragment mmio_fragments
[KVM_MAX_MMIO_FRAGMENTS
];
227 #ifdef CONFIG_KVM_ASYNC_PF
230 struct list_head queue
;
231 struct list_head done
;
236 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
238 * Cpu relax intercept or pause loop exit optimization
239 * in_spin_loop: set when a vcpu does a pause loop exit
240 * or cpu relax intercepted.
241 * dy_eligible: indicates whether vcpu is eligible for directed yield.
248 struct kvm_vcpu_arch arch
;
251 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu
*vcpu
)
253 return cmpxchg(&vcpu
->mode
, IN_GUEST_MODE
, EXITING_GUEST_MODE
);
257 * Some of the bitops functions do not support too long bitmaps.
258 * This number must be determined not to exceed such limits.
260 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
262 struct kvm_memory_slot
{
264 unsigned long npages
;
266 unsigned long *dirty_bitmap
;
267 struct kvm_arch_memory_slot arch
;
268 unsigned long userspace_addr
;
273 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot
*memslot
)
275 return ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
278 struct kvm_kernel_irq_routing_entry
{
281 int (*set
)(struct kvm_kernel_irq_routing_entry
*e
,
282 struct kvm
*kvm
, int irq_source_id
, int level
);
290 struct hlist_node link
;
293 #ifdef __KVM_HAVE_IOAPIC
295 struct kvm_irq_routing_table
{
296 int chip
[KVM_NR_IRQCHIPS
][KVM_IOAPIC_NUM_PINS
];
297 struct kvm_kernel_irq_routing_entry
*rt_entries
;
300 * Array indexed by gsi. Each entry contains list of irq chips
301 * the gsi is connected to.
303 struct hlist_head map
[0];
308 struct kvm_irq_routing_table
{};
312 #ifndef KVM_MEM_SLOTS_NUM
313 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
318 * memslots are not sorted by id anymore, please use id_to_memslot()
319 * to get the memslot by its id.
321 struct kvm_memslots
{
323 struct kvm_memory_slot memslots
[KVM_MEM_SLOTS_NUM
];
324 /* The mapping table from slot id to the index in memslots[]. */
325 int id_to_index
[KVM_MEM_SLOTS_NUM
];
330 struct mutex slots_lock
;
331 struct mm_struct
*mm
; /* userspace tied to this vm */
332 struct kvm_memslots
*memslots
;
333 struct srcu_struct srcu
;
334 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
337 struct kvm_vcpu
*vcpus
[KVM_MAX_VCPUS
];
338 atomic_t online_vcpus
;
339 int last_boosted_vcpu
;
340 struct list_head vm_list
;
342 struct kvm_io_bus
*buses
[KVM_NR_BUSES
];
343 #ifdef CONFIG_HAVE_KVM_EVENTFD
346 struct list_head items
;
347 struct list_head resampler_list
;
348 struct mutex resampler_lock
;
350 struct list_head ioeventfds
;
352 struct kvm_vm_stat stat
;
353 struct kvm_arch arch
;
354 atomic_t users_count
;
355 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
356 struct kvm_coalesced_mmio_ring
*coalesced_mmio_ring
;
357 spinlock_t ring_lock
;
358 struct list_head coalesced_zones
;
361 struct mutex irq_lock
;
362 #ifdef CONFIG_HAVE_KVM_IRQCHIP
364 * Update side is protected by irq_lock and,
365 * if configured, irqfds.lock.
367 struct kvm_irq_routing_table __rcu
*irq_routing
;
368 struct hlist_head mask_notifier_list
;
369 struct hlist_head irq_ack_notifier_list
;
372 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
373 struct mmu_notifier mmu_notifier
;
374 unsigned long mmu_notifier_seq
;
375 long mmu_notifier_count
;
380 #define kvm_err(fmt, ...) \
381 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
382 #define kvm_info(fmt, ...) \
383 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
384 #define kvm_debug(fmt, ...) \
385 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
386 #define kvm_pr_unimpl(fmt, ...) \
387 pr_err_ratelimited("kvm [%i]: " fmt, \
388 task_tgid_nr(current), ## __VA_ARGS__)
390 /* The guest did something we don't support. */
391 #define vcpu_unimpl(vcpu, fmt, ...) \
392 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
394 static inline struct kvm_vcpu
*kvm_get_vcpu(struct kvm
*kvm
, int i
)
397 return kvm
->vcpus
[i
];
400 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
402 idx < atomic_read(&kvm->online_vcpus) && \
403 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
406 #define kvm_for_each_memslot(memslot, slots) \
407 for (memslot = &slots->memslots[0]; \
408 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
411 int kvm_vcpu_init(struct kvm_vcpu
*vcpu
, struct kvm
*kvm
, unsigned id
);
412 void kvm_vcpu_uninit(struct kvm_vcpu
*vcpu
);
414 int __must_check
vcpu_load(struct kvm_vcpu
*vcpu
);
415 void vcpu_put(struct kvm_vcpu
*vcpu
);
417 int kvm_init(void *opaque
, unsigned vcpu_size
, unsigned vcpu_align
,
418 struct module
*module
);
421 void kvm_get_kvm(struct kvm
*kvm
);
422 void kvm_put_kvm(struct kvm
*kvm
);
423 void update_memslots(struct kvm_memslots
*slots
, struct kvm_memory_slot
*new);
425 static inline struct kvm_memslots
*kvm_memslots(struct kvm
*kvm
)
427 return rcu_dereference_check(kvm
->memslots
,
428 srcu_read_lock_held(&kvm
->srcu
)
429 || lockdep_is_held(&kvm
->slots_lock
));
432 static inline struct kvm_memory_slot
*
433 id_to_memslot(struct kvm_memslots
*slots
, int id
)
435 int index
= slots
->id_to_index
[id
];
436 struct kvm_memory_slot
*slot
;
438 slot
= &slots
->memslots
[index
];
440 WARN_ON(slot
->id
!= id
);
444 int kvm_set_memory_region(struct kvm
*kvm
,
445 struct kvm_userspace_memory_region
*mem
,
447 int __kvm_set_memory_region(struct kvm
*kvm
,
448 struct kvm_userspace_memory_region
*mem
,
450 void kvm_arch_free_memslot(struct kvm_memory_slot
*free
,
451 struct kvm_memory_slot
*dont
);
452 int kvm_arch_create_memslot(struct kvm_memory_slot
*slot
, unsigned long npages
);
453 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
454 struct kvm_memory_slot
*memslot
,
455 struct kvm_memory_slot old
,
456 struct kvm_userspace_memory_region
*mem
,
458 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
459 struct kvm_userspace_memory_region
*mem
,
460 struct kvm_memory_slot old
,
462 bool kvm_largepages_enabled(void);
463 void kvm_disable_largepages(void);
464 /* flush all memory translations */
465 void kvm_arch_flush_shadow_all(struct kvm
*kvm
);
466 /* flush memory translations pointing to 'slot' */
467 void kvm_arch_flush_shadow_memslot(struct kvm
*kvm
,
468 struct kvm_memory_slot
*slot
);
470 int gfn_to_page_many_atomic(struct kvm
*kvm
, gfn_t gfn
, struct page
**pages
,
473 struct page
*gfn_to_page(struct kvm
*kvm
, gfn_t gfn
);
474 unsigned long gfn_to_hva(struct kvm
*kvm
, gfn_t gfn
);
475 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
476 void kvm_release_page_clean(struct page
*page
);
477 void kvm_release_page_dirty(struct page
*page
);
478 void kvm_set_page_dirty(struct page
*page
);
479 void kvm_set_page_accessed(struct page
*page
);
481 pfn_t
gfn_to_pfn_atomic(struct kvm
*kvm
, gfn_t gfn
);
482 pfn_t
gfn_to_pfn_async(struct kvm
*kvm
, gfn_t gfn
, bool *async
,
483 bool write_fault
, bool *writable
);
484 pfn_t
gfn_to_pfn(struct kvm
*kvm
, gfn_t gfn
);
485 pfn_t
gfn_to_pfn_prot(struct kvm
*kvm
, gfn_t gfn
, bool write_fault
,
487 pfn_t
gfn_to_pfn_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
488 pfn_t
gfn_to_pfn_memslot_atomic(struct kvm_memory_slot
*slot
, gfn_t gfn
);
490 void kvm_release_pfn_dirty(pfn_t pfn
);
491 void kvm_release_pfn_clean(pfn_t pfn
);
492 void kvm_set_pfn_dirty(pfn_t pfn
);
493 void kvm_set_pfn_accessed(pfn_t pfn
);
494 void kvm_get_pfn(pfn_t pfn
);
496 int kvm_read_guest_page(struct kvm
*kvm
, gfn_t gfn
, void *data
, int offset
,
498 int kvm_read_guest_atomic(struct kvm
*kvm
, gpa_t gpa
, void *data
,
500 int kvm_read_guest(struct kvm
*kvm
, gpa_t gpa
, void *data
, unsigned long len
);
501 int kvm_read_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
502 void *data
, unsigned long len
);
503 int kvm_write_guest_page(struct kvm
*kvm
, gfn_t gfn
, const void *data
,
504 int offset
, int len
);
505 int kvm_write_guest(struct kvm
*kvm
, gpa_t gpa
, const void *data
,
507 int kvm_write_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
508 void *data
, unsigned long len
);
509 int kvm_gfn_to_hva_cache_init(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
511 int kvm_clear_guest_page(struct kvm
*kvm
, gfn_t gfn
, int offset
, int len
);
512 int kvm_clear_guest(struct kvm
*kvm
, gpa_t gpa
, unsigned long len
);
513 struct kvm_memory_slot
*gfn_to_memslot(struct kvm
*kvm
, gfn_t gfn
);
514 int kvm_is_visible_gfn(struct kvm
*kvm
, gfn_t gfn
);
515 unsigned long kvm_host_page_size(struct kvm
*kvm
, gfn_t gfn
);
516 void mark_page_dirty(struct kvm
*kvm
, gfn_t gfn
);
517 void mark_page_dirty_in_slot(struct kvm
*kvm
, struct kvm_memory_slot
*memslot
,
520 void kvm_vcpu_block(struct kvm_vcpu
*vcpu
);
521 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
522 bool kvm_vcpu_yield_to(struct kvm_vcpu
*target
);
523 void kvm_vcpu_on_spin(struct kvm_vcpu
*vcpu
);
524 void kvm_resched(struct kvm_vcpu
*vcpu
);
525 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
);
526 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
);
528 void kvm_flush_remote_tlbs(struct kvm
*kvm
);
529 void kvm_reload_remote_mmus(struct kvm
*kvm
);
531 long kvm_arch_dev_ioctl(struct file
*filp
,
532 unsigned int ioctl
, unsigned long arg
);
533 long kvm_arch_vcpu_ioctl(struct file
*filp
,
534 unsigned int ioctl
, unsigned long arg
);
535 int kvm_arch_vcpu_fault(struct kvm_vcpu
*vcpu
, struct vm_fault
*vmf
);
537 int kvm_dev_ioctl_check_extension(long ext
);
539 int kvm_get_dirty_log(struct kvm
*kvm
,
540 struct kvm_dirty_log
*log
, int *is_dirty
);
541 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
542 struct kvm_dirty_log
*log
);
544 int kvm_vm_ioctl_set_memory_region(struct kvm
*kvm
,
546 kvm_userspace_memory_region
*mem
,
548 int kvm_vm_ioctl_irq_line(struct kvm
*kvm
, struct kvm_irq_level
*irq_level
);
549 long kvm_arch_vm_ioctl(struct file
*filp
,
550 unsigned int ioctl
, unsigned long arg
);
552 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
553 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
555 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
556 struct kvm_translation
*tr
);
558 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
559 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
560 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
561 struct kvm_sregs
*sregs
);
562 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
563 struct kvm_sregs
*sregs
);
564 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
565 struct kvm_mp_state
*mp_state
);
566 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
567 struct kvm_mp_state
*mp_state
);
568 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
569 struct kvm_guest_debug
*dbg
);
570 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
);
572 int kvm_arch_init(void *opaque
);
573 void kvm_arch_exit(void);
575 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
);
576 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
);
578 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
);
579 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
);
580 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
);
581 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
, unsigned int id
);
582 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
);
583 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
);
585 int kvm_arch_vcpu_reset(struct kvm_vcpu
*vcpu
);
586 int kvm_arch_hardware_enable(void *garbage
);
587 void kvm_arch_hardware_disable(void *garbage
);
588 int kvm_arch_hardware_setup(void);
589 void kvm_arch_hardware_unsetup(void);
590 void kvm_arch_check_processor_compat(void *rtn
);
591 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
);
592 int kvm_arch_vcpu_should_kick(struct kvm_vcpu
*vcpu
);
594 void kvm_free_physmem(struct kvm
*kvm
);
596 void *kvm_kvzalloc(unsigned long size
);
597 void kvm_kvfree(const void *addr
);
599 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
600 static inline struct kvm
*kvm_arch_alloc_vm(void)
602 return kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
605 static inline void kvm_arch_free_vm(struct kvm
*kvm
)
611 static inline wait_queue_head_t
*kvm_arch_vcpu_wq(struct kvm_vcpu
*vcpu
)
613 #ifdef __KVM_HAVE_ARCH_WQP
614 return vcpu
->arch
.wqp
;
620 int kvm_arch_init_vm(struct kvm
*kvm
, unsigned long type
);
621 void kvm_arch_destroy_vm(struct kvm
*kvm
);
622 void kvm_free_all_assigned_devices(struct kvm
*kvm
);
623 void kvm_arch_sync_events(struct kvm
*kvm
);
625 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
);
626 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
628 bool kvm_is_mmio_pfn(pfn_t pfn
);
630 struct kvm_irq_ack_notifier
{
631 struct hlist_node link
;
633 void (*irq_acked
)(struct kvm_irq_ack_notifier
*kian
);
636 struct kvm_assigned_dev_kernel
{
637 struct kvm_irq_ack_notifier ack_notifier
;
638 struct list_head list
;
643 unsigned int entries_nr
;
645 bool host_irq_disabled
;
647 struct msix_entry
*host_msix_entries
;
649 struct msix_entry
*guest_msix_entries
;
650 unsigned long irq_requested_type
;
655 spinlock_t intx_lock
;
656 spinlock_t intx_mask_lock
;
658 struct pci_saved_state
*pci_saved_state
;
661 struct kvm_irq_mask_notifier
{
662 void (*func
)(struct kvm_irq_mask_notifier
*kimn
, bool masked
);
664 struct hlist_node link
;
667 void kvm_register_irq_mask_notifier(struct kvm
*kvm
, int irq
,
668 struct kvm_irq_mask_notifier
*kimn
);
669 void kvm_unregister_irq_mask_notifier(struct kvm
*kvm
, int irq
,
670 struct kvm_irq_mask_notifier
*kimn
);
671 void kvm_fire_mask_notifiers(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
,
674 #ifdef __KVM_HAVE_IOAPIC
675 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic
*ioapic
,
676 union kvm_ioapic_redirect_entry
*entry
,
677 unsigned long *deliver_bitmask
);
679 int kvm_set_irq(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
);
680 int kvm_set_msi(struct kvm_kernel_irq_routing_entry
*irq_entry
, struct kvm
*kvm
,
681 int irq_source_id
, int level
);
682 void kvm_notify_acked_irq(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
683 void kvm_register_irq_ack_notifier(struct kvm
*kvm
,
684 struct kvm_irq_ack_notifier
*kian
);
685 void kvm_unregister_irq_ack_notifier(struct kvm
*kvm
,
686 struct kvm_irq_ack_notifier
*kian
);
687 int kvm_request_irq_source_id(struct kvm
*kvm
);
688 void kvm_free_irq_source_id(struct kvm
*kvm
, int irq_source_id
);
690 /* For vcpu->arch.iommu_flags */
691 #define KVM_IOMMU_CACHE_COHERENCY 0x1
693 #ifdef CONFIG_IOMMU_API
694 int kvm_iommu_map_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
695 void kvm_iommu_unmap_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
696 int kvm_iommu_map_guest(struct kvm
*kvm
);
697 int kvm_iommu_unmap_guest(struct kvm
*kvm
);
698 int kvm_assign_device(struct kvm
*kvm
,
699 struct kvm_assigned_dev_kernel
*assigned_dev
);
700 int kvm_deassign_device(struct kvm
*kvm
,
701 struct kvm_assigned_dev_kernel
*assigned_dev
);
702 #else /* CONFIG_IOMMU_API */
703 static inline int kvm_iommu_map_pages(struct kvm
*kvm
,
704 struct kvm_memory_slot
*slot
)
709 static inline void kvm_iommu_unmap_pages(struct kvm
*kvm
,
710 struct kvm_memory_slot
*slot
)
714 static inline int kvm_iommu_map_guest(struct kvm
*kvm
)
719 static inline int kvm_iommu_unmap_guest(struct kvm
*kvm
)
724 static inline int kvm_assign_device(struct kvm
*kvm
,
725 struct kvm_assigned_dev_kernel
*assigned_dev
)
730 static inline int kvm_deassign_device(struct kvm
*kvm
,
731 struct kvm_assigned_dev_kernel
*assigned_dev
)
735 #endif /* CONFIG_IOMMU_API */
737 static inline void kvm_guest_enter(void)
739 BUG_ON(preemptible());
740 vtime_account(current
);
741 current
->flags
|= PF_VCPU
;
742 /* KVM does not hold any references to rcu protected data when it
743 * switches CPU into a guest mode. In fact switching to a guest mode
744 * is very similar to exiting to userspase from rcu point of view. In
745 * addition CPU may stay in a guest mode for quite a long time (up to
746 * one time slice). Lets treat guest mode as quiescent state, just like
747 * we do with user-mode execution.
749 rcu_virt_note_context_switch(smp_processor_id());
752 static inline void kvm_guest_exit(void)
754 vtime_account(current
);
755 current
->flags
&= ~PF_VCPU
;
759 * search_memslots() and __gfn_to_memslot() are here because they are
760 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
761 * gfn_to_memslot() itself isn't here as an inline because that would
762 * bloat other code too much.
764 static inline struct kvm_memory_slot
*
765 search_memslots(struct kvm_memslots
*slots
, gfn_t gfn
)
767 struct kvm_memory_slot
*memslot
;
769 kvm_for_each_memslot(memslot
, slots
)
770 if (gfn
>= memslot
->base_gfn
&&
771 gfn
< memslot
->base_gfn
+ memslot
->npages
)
777 static inline struct kvm_memory_slot
*
778 __gfn_to_memslot(struct kvm_memslots
*slots
, gfn_t gfn
)
780 return search_memslots(slots
, gfn
);
783 static inline unsigned long
784 __gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
)
786 return slot
->userspace_addr
+ (gfn
- slot
->base_gfn
) * PAGE_SIZE
;
789 static inline int memslot_id(struct kvm
*kvm
, gfn_t gfn
)
791 return gfn_to_memslot(kvm
, gfn
)->id
;
794 static inline gfn_t
gfn_to_index(gfn_t gfn
, gfn_t base_gfn
, int level
)
796 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
797 return (gfn
>> KVM_HPAGE_GFN_SHIFT(level
)) -
798 (base_gfn
>> KVM_HPAGE_GFN_SHIFT(level
));
802 hva_to_gfn_memslot(unsigned long hva
, struct kvm_memory_slot
*slot
)
804 gfn_t gfn_offset
= (hva
- slot
->userspace_addr
) >> PAGE_SHIFT
;
806 return slot
->base_gfn
+ gfn_offset
;
809 static inline gpa_t
gfn_to_gpa(gfn_t gfn
)
811 return (gpa_t
)gfn
<< PAGE_SHIFT
;
814 static inline gfn_t
gpa_to_gfn(gpa_t gpa
)
816 return (gfn_t
)(gpa
>> PAGE_SHIFT
);
819 static inline hpa_t
pfn_to_hpa(pfn_t pfn
)
821 return (hpa_t
)pfn
<< PAGE_SHIFT
;
824 static inline void kvm_migrate_timers(struct kvm_vcpu
*vcpu
)
826 set_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
);
834 struct kvm_stats_debugfs_item
{
837 enum kvm_stat_kind kind
;
838 struct dentry
*dentry
;
840 extern struct kvm_stats_debugfs_item debugfs_entries
[];
841 extern struct dentry
*kvm_debugfs_dir
;
843 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
844 static inline int mmu_notifier_retry(struct kvm_vcpu
*vcpu
, unsigned long mmu_seq
)
846 if (unlikely(vcpu
->kvm
->mmu_notifier_count
))
849 * Ensure the read of mmu_notifier_count happens before the read
850 * of mmu_notifier_seq. This interacts with the smp_wmb() in
851 * mmu_notifier_invalidate_range_end to make sure that the caller
852 * either sees the old (non-zero) value of mmu_notifier_count or
853 * the new (incremented) value of mmu_notifier_seq.
854 * PowerPC Book3s HV KVM calls this under a per-page lock
855 * rather than under kvm->mmu_lock, for scalability, so
856 * can't rely on kvm->mmu_lock to keep things ordered.
859 if (vcpu
->kvm
->mmu_notifier_seq
!= mmu_seq
)
865 #ifdef KVM_CAP_IRQ_ROUTING
867 #define KVM_MAX_IRQ_ROUTES 1024
869 int kvm_setup_default_irq_routing(struct kvm
*kvm
);
870 int kvm_set_irq_routing(struct kvm
*kvm
,
871 const struct kvm_irq_routing_entry
*entries
,
874 void kvm_free_irq_routing(struct kvm
*kvm
);
876 int kvm_send_userspace_msi(struct kvm
*kvm
, struct kvm_msi
*msi
);
880 static inline void kvm_free_irq_routing(struct kvm
*kvm
) {}
884 #ifdef CONFIG_HAVE_KVM_EVENTFD
886 void kvm_eventfd_init(struct kvm
*kvm
);
887 int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
);
888 void kvm_irqfd_release(struct kvm
*kvm
);
889 void kvm_irq_routing_update(struct kvm
*, struct kvm_irq_routing_table
*);
890 int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
);
894 static inline void kvm_eventfd_init(struct kvm
*kvm
) {}
896 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
901 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
903 #ifdef CONFIG_HAVE_KVM_IRQCHIP
904 static inline void kvm_irq_routing_update(struct kvm
*kvm
,
905 struct kvm_irq_routing_table
*irq_rt
)
907 rcu_assign_pointer(kvm
->irq_routing
, irq_rt
);
911 static inline int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
)
916 #endif /* CONFIG_HAVE_KVM_EVENTFD */
918 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
919 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu
*vcpu
)
921 return vcpu
->kvm
->bsp_vcpu_id
== vcpu
->vcpu_id
;
924 bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
);
928 static inline bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
) { return true; }
932 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
934 long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
939 static inline long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
947 static inline void kvm_make_request(int req
, struct kvm_vcpu
*vcpu
)
949 set_bit(req
, &vcpu
->requests
);
952 static inline bool kvm_check_request(int req
, struct kvm_vcpu
*vcpu
)
954 if (test_bit(req
, &vcpu
->requests
)) {
955 clear_bit(req
, &vcpu
->requests
);
962 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
964 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
966 vcpu
->spin_loop
.in_spin_loop
= val
;
968 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
970 vcpu
->spin_loop
.dy_eligible
= val
;
973 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
975 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
979 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
983 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu
*vcpu
)
988 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */