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 <asm/signal.h>
26 #include <linux/kvm.h>
27 #include <linux/kvm_para.h>
29 #include <linux/kvm_types.h>
31 #include <asm/kvm_host.h>
34 #define KVM_MMIO_SIZE 8
38 * If we support unaligned MMIO, at most one fragment will be split into two:
40 #ifdef KVM_UNALIGNED_MMIO
41 # define KVM_EXTRA_MMIO_FRAGMENTS 1
43 # define KVM_EXTRA_MMIO_FRAGMENTS 0
46 #define KVM_USER_MMIO_SIZE 8
48 #define KVM_MAX_MMIO_FRAGMENTS \
49 (KVM_MMIO_SIZE / KVM_USER_MMIO_SIZE + KVM_EXTRA_MMIO_FRAGMENTS)
52 * vcpu->requests bit members
54 #define KVM_REQ_TLB_FLUSH 0
55 #define KVM_REQ_MIGRATE_TIMER 1
56 #define KVM_REQ_REPORT_TPR_ACCESS 2
57 #define KVM_REQ_MMU_RELOAD 3
58 #define KVM_REQ_TRIPLE_FAULT 4
59 #define KVM_REQ_PENDING_TIMER 5
60 #define KVM_REQ_UNHALT 6
61 #define KVM_REQ_MMU_SYNC 7
62 #define KVM_REQ_CLOCK_UPDATE 8
63 #define KVM_REQ_KICK 9
64 #define KVM_REQ_DEACTIVATE_FPU 10
65 #define KVM_REQ_EVENT 11
66 #define KVM_REQ_APF_HALT 12
67 #define KVM_REQ_STEAL_UPDATE 13
68 #define KVM_REQ_NMI 14
69 #define KVM_REQ_IMMEDIATE_EXIT 15
70 #define KVM_REQ_PMU 16
71 #define KVM_REQ_PMI 17
73 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
77 extern struct kmem_cache
*kvm_vcpu_cache
;
82 struct kvm_io_device
*dev
;
85 #define NR_IOBUS_DEVS 1000
89 struct kvm_io_range range
[];
98 int kvm_io_bus_write(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
99 int len
, const void *val
);
100 int kvm_io_bus_read(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
, int len
,
102 int kvm_io_bus_register_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
103 int len
, struct kvm_io_device
*dev
);
104 int kvm_io_bus_unregister_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
,
105 struct kvm_io_device
*dev
);
107 #ifdef CONFIG_KVM_ASYNC_PF
108 struct kvm_async_pf
{
109 struct work_struct work
;
110 struct list_head link
;
111 struct list_head queue
;
112 struct kvm_vcpu
*vcpu
;
113 struct mm_struct
*mm
;
116 struct kvm_arch_async_pf arch
;
121 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu
*vcpu
);
122 void kvm_check_async_pf_completion(struct kvm_vcpu
*vcpu
);
123 int kvm_setup_async_pf(struct kvm_vcpu
*vcpu
, gva_t gva
, gfn_t gfn
,
124 struct kvm_arch_async_pf
*arch
);
125 int kvm_async_pf_wakeup_all(struct kvm_vcpu
*vcpu
);
132 READING_SHADOW_PAGE_TABLES
,
136 * Sometimes a large or cross-page mmio needs to be broken up into separate
137 * exits for userspace servicing.
139 struct kvm_mmio_fragment
{
147 #ifdef CONFIG_PREEMPT_NOTIFIERS
148 struct preempt_notifier preempt_notifier
;
154 unsigned long requests
;
155 unsigned long guest_debug
;
161 int guest_fpu_loaded
, guest_xcr0_loaded
;
162 wait_queue_head_t wq
;
166 struct kvm_vcpu_stat stat
;
168 #ifdef CONFIG_HAS_IOMEM
170 int mmio_read_completed
;
172 int mmio_cur_fragment
;
173 int mmio_nr_fragments
;
174 struct kvm_mmio_fragment mmio_fragments
[KVM_MAX_MMIO_FRAGMENTS
];
177 #ifdef CONFIG_KVM_ASYNC_PF
180 struct list_head queue
;
181 struct list_head done
;
186 struct kvm_vcpu_arch arch
;
189 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu
*vcpu
)
191 return cmpxchg(&vcpu
->mode
, IN_GUEST_MODE
, EXITING_GUEST_MODE
);
195 * Some of the bitops functions do not support too long bitmaps.
196 * This number must be determined not to exceed such limits.
198 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
200 struct kvm_memory_slot
{
202 unsigned long npages
;
205 unsigned long *dirty_bitmap
;
206 struct kvm_arch_memory_slot arch
;
207 unsigned long userspace_addr
;
212 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot
*memslot
)
214 return ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
217 struct kvm_kernel_irq_routing_entry
{
220 int (*set
)(struct kvm_kernel_irq_routing_entry
*e
,
221 struct kvm
*kvm
, int irq_source_id
, int level
);
229 struct hlist_node link
;
232 #ifdef __KVM_HAVE_IOAPIC
234 struct kvm_irq_routing_table
{
235 int chip
[KVM_NR_IRQCHIPS
][KVM_IOAPIC_NUM_PINS
];
236 struct kvm_kernel_irq_routing_entry
*rt_entries
;
239 * Array indexed by gsi. Each entry contains list of irq chips
240 * the gsi is connected to.
242 struct hlist_head map
[0];
247 struct kvm_irq_routing_table
{};
251 #ifndef KVM_MEM_SLOTS_NUM
252 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
257 * memslots are not sorted by id anymore, please use id_to_memslot()
258 * to get the memslot by its id.
260 struct kvm_memslots
{
262 struct kvm_memory_slot memslots
[KVM_MEM_SLOTS_NUM
];
263 /* The mapping table from slot id to the index in memslots[]. */
264 int id_to_index
[KVM_MEM_SLOTS_NUM
];
269 struct mutex slots_lock
;
270 struct mm_struct
*mm
; /* userspace tied to this vm */
271 struct kvm_memslots
*memslots
;
272 struct srcu_struct srcu
;
273 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
276 struct kvm_vcpu
*vcpus
[KVM_MAX_VCPUS
];
277 atomic_t online_vcpus
;
278 int last_boosted_vcpu
;
279 struct list_head vm_list
;
281 struct kvm_io_bus
*buses
[KVM_NR_BUSES
];
282 #ifdef CONFIG_HAVE_KVM_EVENTFD
285 struct list_head items
;
287 struct list_head ioeventfds
;
289 struct kvm_vm_stat stat
;
290 struct kvm_arch arch
;
291 atomic_t users_count
;
292 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
293 struct kvm_coalesced_mmio_ring
*coalesced_mmio_ring
;
294 spinlock_t ring_lock
;
295 struct list_head coalesced_zones
;
298 struct mutex irq_lock
;
299 #ifdef CONFIG_HAVE_KVM_IRQCHIP
301 * Update side is protected by irq_lock and,
302 * if configured, irqfds.lock.
304 struct kvm_irq_routing_table __rcu
*irq_routing
;
305 struct hlist_head mask_notifier_list
;
306 struct hlist_head irq_ack_notifier_list
;
309 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
310 struct mmu_notifier mmu_notifier
;
311 unsigned long mmu_notifier_seq
;
312 long mmu_notifier_count
;
317 #define kvm_err(fmt, ...) \
318 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
319 #define kvm_info(fmt, ...) \
320 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
321 #define kvm_debug(fmt, ...) \
322 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
323 #define kvm_pr_unimpl(fmt, ...) \
324 pr_err_ratelimited("kvm [%i]: " fmt, \
325 task_tgid_nr(current), ## __VA_ARGS__)
327 /* The guest did something we don't support. */
328 #define vcpu_unimpl(vcpu, fmt, ...) \
329 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
331 static inline struct kvm_vcpu
*kvm_get_vcpu(struct kvm
*kvm
, int i
)
334 return kvm
->vcpus
[i
];
337 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
339 idx < atomic_read(&kvm->online_vcpus) && \
340 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
343 #define kvm_for_each_memslot(memslot, slots) \
344 for (memslot = &slots->memslots[0]; \
345 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
348 int kvm_vcpu_init(struct kvm_vcpu
*vcpu
, struct kvm
*kvm
, unsigned id
);
349 void kvm_vcpu_uninit(struct kvm_vcpu
*vcpu
);
351 void vcpu_load(struct kvm_vcpu
*vcpu
);
352 void vcpu_put(struct kvm_vcpu
*vcpu
);
354 int kvm_init(void *opaque
, unsigned vcpu_size
, unsigned vcpu_align
,
355 struct module
*module
);
358 void kvm_get_kvm(struct kvm
*kvm
);
359 void kvm_put_kvm(struct kvm
*kvm
);
360 void update_memslots(struct kvm_memslots
*slots
, struct kvm_memory_slot
*new);
362 static inline struct kvm_memslots
*kvm_memslots(struct kvm
*kvm
)
364 return rcu_dereference_check(kvm
->memslots
,
365 srcu_read_lock_held(&kvm
->srcu
)
366 || lockdep_is_held(&kvm
->slots_lock
));
369 static inline struct kvm_memory_slot
*
370 id_to_memslot(struct kvm_memslots
*slots
, int id
)
372 int index
= slots
->id_to_index
[id
];
373 struct kvm_memory_slot
*slot
;
375 slot
= &slots
->memslots
[index
];
377 WARN_ON(slot
->id
!= id
);
381 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
382 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
383 static inline int is_error_hpa(hpa_t hpa
) { return hpa
>> HPA_MSB
; }
385 extern struct page
*bad_page
;
386 extern struct page
*fault_page
;
388 extern pfn_t bad_pfn
;
389 extern pfn_t fault_pfn
;
391 int is_error_page(struct page
*page
);
392 int is_error_pfn(pfn_t pfn
);
393 int is_hwpoison_pfn(pfn_t pfn
);
394 int is_fault_pfn(pfn_t pfn
);
395 int is_noslot_pfn(pfn_t pfn
);
396 int is_invalid_pfn(pfn_t pfn
);
397 int kvm_is_error_hva(unsigned long addr
);
398 int kvm_set_memory_region(struct kvm
*kvm
,
399 struct kvm_userspace_memory_region
*mem
,
401 int __kvm_set_memory_region(struct kvm
*kvm
,
402 struct kvm_userspace_memory_region
*mem
,
404 void kvm_arch_free_memslot(struct kvm_memory_slot
*free
,
405 struct kvm_memory_slot
*dont
);
406 int kvm_arch_create_memslot(struct kvm_memory_slot
*slot
, unsigned long npages
);
407 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
408 struct kvm_memory_slot
*memslot
,
409 struct kvm_memory_slot old
,
410 struct kvm_userspace_memory_region
*mem
,
412 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
413 struct kvm_userspace_memory_region
*mem
,
414 struct kvm_memory_slot old
,
416 bool kvm_largepages_enabled(void);
417 void kvm_disable_largepages(void);
418 void kvm_arch_flush_shadow(struct kvm
*kvm
);
420 int gfn_to_page_many_atomic(struct kvm
*kvm
, gfn_t gfn
, struct page
**pages
,
423 struct page
*gfn_to_page(struct kvm
*kvm
, gfn_t gfn
);
424 unsigned long gfn_to_hva(struct kvm
*kvm
, gfn_t gfn
);
425 void kvm_release_page_clean(struct page
*page
);
426 void kvm_release_page_dirty(struct page
*page
);
427 void kvm_set_page_dirty(struct page
*page
);
428 void kvm_set_page_accessed(struct page
*page
);
430 pfn_t
hva_to_pfn_atomic(struct kvm
*kvm
, unsigned long addr
);
431 pfn_t
gfn_to_pfn_atomic(struct kvm
*kvm
, gfn_t gfn
);
432 pfn_t
gfn_to_pfn_async(struct kvm
*kvm
, gfn_t gfn
, bool *async
,
433 bool write_fault
, bool *writable
);
434 pfn_t
gfn_to_pfn(struct kvm
*kvm
, gfn_t gfn
);
435 pfn_t
gfn_to_pfn_prot(struct kvm
*kvm
, gfn_t gfn
, bool write_fault
,
437 pfn_t
gfn_to_pfn_memslot(struct kvm
*kvm
,
438 struct kvm_memory_slot
*slot
, gfn_t gfn
);
439 void kvm_release_pfn_dirty(pfn_t
);
440 void kvm_release_pfn_clean(pfn_t pfn
);
441 void kvm_set_pfn_dirty(pfn_t pfn
);
442 void kvm_set_pfn_accessed(pfn_t pfn
);
443 void kvm_get_pfn(pfn_t pfn
);
445 int kvm_read_guest_page(struct kvm
*kvm
, gfn_t gfn
, void *data
, int offset
,
447 int kvm_read_guest_atomic(struct kvm
*kvm
, gpa_t gpa
, void *data
,
449 int kvm_read_guest(struct kvm
*kvm
, gpa_t gpa
, void *data
, unsigned long len
);
450 int kvm_read_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
451 void *data
, unsigned long len
);
452 int kvm_write_guest_page(struct kvm
*kvm
, gfn_t gfn
, const void *data
,
453 int offset
, int len
);
454 int kvm_write_guest(struct kvm
*kvm
, gpa_t gpa
, const void *data
,
456 int kvm_write_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
457 void *data
, unsigned long len
);
458 int kvm_gfn_to_hva_cache_init(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
460 int kvm_clear_guest_page(struct kvm
*kvm
, gfn_t gfn
, int offset
, int len
);
461 int kvm_clear_guest(struct kvm
*kvm
, gpa_t gpa
, unsigned long len
);
462 struct kvm_memory_slot
*gfn_to_memslot(struct kvm
*kvm
, gfn_t gfn
);
463 int kvm_is_visible_gfn(struct kvm
*kvm
, gfn_t gfn
);
464 unsigned long kvm_host_page_size(struct kvm
*kvm
, gfn_t gfn
);
465 void mark_page_dirty(struct kvm
*kvm
, gfn_t gfn
);
466 void mark_page_dirty_in_slot(struct kvm
*kvm
, struct kvm_memory_slot
*memslot
,
469 void kvm_vcpu_block(struct kvm_vcpu
*vcpu
);
470 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
471 bool kvm_vcpu_yield_to(struct kvm_vcpu
*target
);
472 void kvm_vcpu_on_spin(struct kvm_vcpu
*vcpu
);
473 void kvm_resched(struct kvm_vcpu
*vcpu
);
474 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
);
475 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
);
477 void kvm_flush_remote_tlbs(struct kvm
*kvm
);
478 void kvm_reload_remote_mmus(struct kvm
*kvm
);
480 long kvm_arch_dev_ioctl(struct file
*filp
,
481 unsigned int ioctl
, unsigned long arg
);
482 long kvm_arch_vcpu_ioctl(struct file
*filp
,
483 unsigned int ioctl
, unsigned long arg
);
484 int kvm_arch_vcpu_fault(struct kvm_vcpu
*vcpu
, struct vm_fault
*vmf
);
486 int kvm_dev_ioctl_check_extension(long ext
);
488 int kvm_get_dirty_log(struct kvm
*kvm
,
489 struct kvm_dirty_log
*log
, int *is_dirty
);
490 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
491 struct kvm_dirty_log
*log
);
493 int kvm_vm_ioctl_set_memory_region(struct kvm
*kvm
,
495 kvm_userspace_memory_region
*mem
,
497 long kvm_arch_vm_ioctl(struct file
*filp
,
498 unsigned int ioctl
, unsigned long arg
);
500 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
501 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
503 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
504 struct kvm_translation
*tr
);
506 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
507 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
508 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
509 struct kvm_sregs
*sregs
);
510 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
511 struct kvm_sregs
*sregs
);
512 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
513 struct kvm_mp_state
*mp_state
);
514 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
515 struct kvm_mp_state
*mp_state
);
516 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
517 struct kvm_guest_debug
*dbg
);
518 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
);
520 int kvm_arch_init(void *opaque
);
521 void kvm_arch_exit(void);
523 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
);
524 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
);
526 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
);
527 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
);
528 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
);
529 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
, unsigned int id
);
530 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
);
531 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
);
533 int kvm_arch_vcpu_reset(struct kvm_vcpu
*vcpu
);
534 int kvm_arch_hardware_enable(void *garbage
);
535 void kvm_arch_hardware_disable(void *garbage
);
536 int kvm_arch_hardware_setup(void);
537 void kvm_arch_hardware_unsetup(void);
538 void kvm_arch_check_processor_compat(void *rtn
);
539 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
);
540 int kvm_arch_vcpu_should_kick(struct kvm_vcpu
*vcpu
);
542 void kvm_free_physmem(struct kvm
*kvm
);
544 void *kvm_kvzalloc(unsigned long size
);
545 void kvm_kvfree(const void *addr
);
547 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
548 static inline struct kvm
*kvm_arch_alloc_vm(void)
550 return kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
553 static inline void kvm_arch_free_vm(struct kvm
*kvm
)
559 static inline wait_queue_head_t
*kvm_arch_vcpu_wq(struct kvm_vcpu
*vcpu
)
561 #ifdef __KVM_HAVE_ARCH_WQP
562 return vcpu
->arch
.wqp
;
568 int kvm_arch_init_vm(struct kvm
*kvm
, unsigned long type
);
569 void kvm_arch_destroy_vm(struct kvm
*kvm
);
570 void kvm_free_all_assigned_devices(struct kvm
*kvm
);
571 void kvm_arch_sync_events(struct kvm
*kvm
);
573 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
);
574 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
576 int kvm_is_mmio_pfn(pfn_t pfn
);
578 struct kvm_irq_ack_notifier
{
579 struct hlist_node link
;
581 void (*irq_acked
)(struct kvm_irq_ack_notifier
*kian
);
584 struct kvm_assigned_dev_kernel
{
585 struct kvm_irq_ack_notifier ack_notifier
;
586 struct list_head list
;
591 unsigned int entries_nr
;
593 bool host_irq_disabled
;
595 struct msix_entry
*host_msix_entries
;
597 struct msix_entry
*guest_msix_entries
;
598 unsigned long irq_requested_type
;
603 spinlock_t intx_lock
;
604 spinlock_t intx_mask_lock
;
606 struct pci_saved_state
*pci_saved_state
;
609 struct kvm_irq_mask_notifier
{
610 void (*func
)(struct kvm_irq_mask_notifier
*kimn
, bool masked
);
612 struct hlist_node link
;
615 void kvm_register_irq_mask_notifier(struct kvm
*kvm
, int irq
,
616 struct kvm_irq_mask_notifier
*kimn
);
617 void kvm_unregister_irq_mask_notifier(struct kvm
*kvm
, int irq
,
618 struct kvm_irq_mask_notifier
*kimn
);
619 void kvm_fire_mask_notifiers(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
,
622 #ifdef __KVM_HAVE_IOAPIC
623 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic
*ioapic
,
624 union kvm_ioapic_redirect_entry
*entry
,
625 unsigned long *deliver_bitmask
);
627 int kvm_set_irq(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
);
628 int kvm_set_msi(struct kvm_kernel_irq_routing_entry
*irq_entry
, struct kvm
*kvm
,
629 int irq_source_id
, int level
);
630 void kvm_notify_acked_irq(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
631 void kvm_register_irq_ack_notifier(struct kvm
*kvm
,
632 struct kvm_irq_ack_notifier
*kian
);
633 void kvm_unregister_irq_ack_notifier(struct kvm
*kvm
,
634 struct kvm_irq_ack_notifier
*kian
);
635 int kvm_request_irq_source_id(struct kvm
*kvm
);
636 void kvm_free_irq_source_id(struct kvm
*kvm
, int irq_source_id
);
638 /* For vcpu->arch.iommu_flags */
639 #define KVM_IOMMU_CACHE_COHERENCY 0x1
641 #ifdef CONFIG_IOMMU_API
642 int kvm_iommu_map_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
643 void kvm_iommu_unmap_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
644 int kvm_iommu_map_guest(struct kvm
*kvm
);
645 int kvm_iommu_unmap_guest(struct kvm
*kvm
);
646 int kvm_assign_device(struct kvm
*kvm
,
647 struct kvm_assigned_dev_kernel
*assigned_dev
);
648 int kvm_deassign_device(struct kvm
*kvm
,
649 struct kvm_assigned_dev_kernel
*assigned_dev
);
650 #else /* CONFIG_IOMMU_API */
651 static inline int kvm_iommu_map_pages(struct kvm
*kvm
,
652 struct kvm_memory_slot
*slot
)
657 static inline void kvm_iommu_unmap_pages(struct kvm
*kvm
,
658 struct kvm_memory_slot
*slot
)
662 static inline int kvm_iommu_map_guest(struct kvm
*kvm
)
667 static inline int kvm_iommu_unmap_guest(struct kvm
*kvm
)
672 static inline int kvm_assign_device(struct kvm
*kvm
,
673 struct kvm_assigned_dev_kernel
*assigned_dev
)
678 static inline int kvm_deassign_device(struct kvm
*kvm
,
679 struct kvm_assigned_dev_kernel
*assigned_dev
)
683 #endif /* CONFIG_IOMMU_API */
685 static inline void kvm_guest_enter(void)
687 BUG_ON(preemptible());
688 account_system_vtime(current
);
689 current
->flags
|= PF_VCPU
;
690 /* KVM does not hold any references to rcu protected data when it
691 * switches CPU into a guest mode. In fact switching to a guest mode
692 * is very similar to exiting to userspase from rcu point of view. In
693 * addition CPU may stay in a guest mode for quite a long time (up to
694 * one time slice). Lets treat guest mode as quiescent state, just like
695 * we do with user-mode execution.
697 rcu_virt_note_context_switch(smp_processor_id());
700 static inline void kvm_guest_exit(void)
702 account_system_vtime(current
);
703 current
->flags
&= ~PF_VCPU
;
707 * search_memslots() and __gfn_to_memslot() are here because they are
708 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
709 * gfn_to_memslot() itself isn't here as an inline because that would
710 * bloat other code too much.
712 static inline struct kvm_memory_slot
*
713 search_memslots(struct kvm_memslots
*slots
, gfn_t gfn
)
715 struct kvm_memory_slot
*memslot
;
717 kvm_for_each_memslot(memslot
, slots
)
718 if (gfn
>= memslot
->base_gfn
&&
719 gfn
< memslot
->base_gfn
+ memslot
->npages
)
725 static inline struct kvm_memory_slot
*
726 __gfn_to_memslot(struct kvm_memslots
*slots
, gfn_t gfn
)
728 return search_memslots(slots
, gfn
);
731 static inline int memslot_id(struct kvm
*kvm
, gfn_t gfn
)
733 return gfn_to_memslot(kvm
, gfn
)->id
;
736 static inline gfn_t
gfn_to_index(gfn_t gfn
, gfn_t base_gfn
, int level
)
738 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
739 return (gfn
>> KVM_HPAGE_GFN_SHIFT(level
)) -
740 (base_gfn
>> KVM_HPAGE_GFN_SHIFT(level
));
743 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot
*slot
,
746 return slot
->userspace_addr
+ (gfn
- slot
->base_gfn
) * PAGE_SIZE
;
749 static inline gpa_t
gfn_to_gpa(gfn_t gfn
)
751 return (gpa_t
)gfn
<< PAGE_SHIFT
;
754 static inline gfn_t
gpa_to_gfn(gpa_t gpa
)
756 return (gfn_t
)(gpa
>> PAGE_SHIFT
);
759 static inline hpa_t
pfn_to_hpa(pfn_t pfn
)
761 return (hpa_t
)pfn
<< PAGE_SHIFT
;
764 static inline void kvm_migrate_timers(struct kvm_vcpu
*vcpu
)
766 set_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
);
774 struct kvm_stats_debugfs_item
{
777 enum kvm_stat_kind kind
;
778 struct dentry
*dentry
;
780 extern struct kvm_stats_debugfs_item debugfs_entries
[];
781 extern struct dentry
*kvm_debugfs_dir
;
783 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
784 static inline int mmu_notifier_retry(struct kvm_vcpu
*vcpu
, unsigned long mmu_seq
)
786 if (unlikely(vcpu
->kvm
->mmu_notifier_count
))
789 * Ensure the read of mmu_notifier_count happens before the read
790 * of mmu_notifier_seq. This interacts with the smp_wmb() in
791 * mmu_notifier_invalidate_range_end to make sure that the caller
792 * either sees the old (non-zero) value of mmu_notifier_count or
793 * the new (incremented) value of mmu_notifier_seq.
794 * PowerPC Book3s HV KVM calls this under a per-page lock
795 * rather than under kvm->mmu_lock, for scalability, so
796 * can't rely on kvm->mmu_lock to keep things ordered.
799 if (vcpu
->kvm
->mmu_notifier_seq
!= mmu_seq
)
805 #ifdef KVM_CAP_IRQ_ROUTING
807 #define KVM_MAX_IRQ_ROUTES 1024
809 int kvm_setup_default_irq_routing(struct kvm
*kvm
);
810 int kvm_set_irq_routing(struct kvm
*kvm
,
811 const struct kvm_irq_routing_entry
*entries
,
814 void kvm_free_irq_routing(struct kvm
*kvm
);
816 int kvm_send_userspace_msi(struct kvm
*kvm
, struct kvm_msi
*msi
);
820 static inline void kvm_free_irq_routing(struct kvm
*kvm
) {}
824 #ifdef CONFIG_HAVE_KVM_EVENTFD
826 void kvm_eventfd_init(struct kvm
*kvm
);
827 int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
);
828 void kvm_irqfd_release(struct kvm
*kvm
);
829 void kvm_irq_routing_update(struct kvm
*, struct kvm_irq_routing_table
*);
830 int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
);
834 static inline void kvm_eventfd_init(struct kvm
*kvm
) {}
836 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
841 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
843 #ifdef CONFIG_HAVE_KVM_IRQCHIP
844 static inline void kvm_irq_routing_update(struct kvm
*kvm
,
845 struct kvm_irq_routing_table
*irq_rt
)
847 rcu_assign_pointer(kvm
->irq_routing
, irq_rt
);
851 static inline int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
)
856 #endif /* CONFIG_HAVE_KVM_EVENTFD */
858 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
859 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu
*vcpu
)
861 return vcpu
->kvm
->bsp_vcpu_id
== vcpu
->vcpu_id
;
864 bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
);
868 static inline bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
) { return true; }
872 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
874 long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
879 static inline long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
887 static inline void kvm_make_request(int req
, struct kvm_vcpu
*vcpu
)
889 set_bit(req
, &vcpu
->requests
);
892 static inline bool kvm_check_request(int req
, struct kvm_vcpu
*vcpu
)
894 if (test_bit(req
, &vcpu
->requests
)) {
895 clear_bit(req
, &vcpu
->requests
);