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)
45 /* Two fragments for cross MMIO pages. */
46 #define KVM_MAX_MMIO_FRAGMENTS 2
49 * For the normal pfn, the highest 12 bits should be zero,
50 * so we can mask these bits to indicate the error.
52 #define KVM_PFN_ERR_MASK (0xfffULL << 52)
54 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
55 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
56 #define KVM_PFN_ERR_BAD (KVM_PFN_ERR_MASK + 2)
57 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 3)
59 static inline bool is_error_pfn(pfn_t pfn
)
61 return !!(pfn
& KVM_PFN_ERR_MASK
);
64 static inline bool is_noslot_pfn(pfn_t pfn
)
66 return pfn
== KVM_PFN_ERR_BAD
;
69 static inline bool is_invalid_pfn(pfn_t pfn
)
71 return !is_noslot_pfn(pfn
) && is_error_pfn(pfn
);
74 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
75 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
77 static inline bool kvm_is_error_hva(unsigned long addr
)
79 return addr
>= PAGE_OFFSET
;
82 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
84 static inline bool is_error_page(struct page
*page
)
90 * vcpu->requests bit members
92 #define KVM_REQ_TLB_FLUSH 0
93 #define KVM_REQ_MIGRATE_TIMER 1
94 #define KVM_REQ_REPORT_TPR_ACCESS 2
95 #define KVM_REQ_MMU_RELOAD 3
96 #define KVM_REQ_TRIPLE_FAULT 4
97 #define KVM_REQ_PENDING_TIMER 5
98 #define KVM_REQ_UNHALT 6
99 #define KVM_REQ_MMU_SYNC 7
100 #define KVM_REQ_CLOCK_UPDATE 8
101 #define KVM_REQ_KICK 9
102 #define KVM_REQ_DEACTIVATE_FPU 10
103 #define KVM_REQ_EVENT 11
104 #define KVM_REQ_APF_HALT 12
105 #define KVM_REQ_STEAL_UPDATE 13
106 #define KVM_REQ_NMI 14
107 #define KVM_REQ_IMMEDIATE_EXIT 15
108 #define KVM_REQ_PMU 16
109 #define KVM_REQ_PMI 17
111 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
112 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
116 extern struct kmem_cache
*kvm_vcpu_cache
;
118 struct kvm_io_range
{
121 struct kvm_io_device
*dev
;
124 #define NR_IOBUS_DEVS 1000
128 struct kvm_io_range range
[];
137 int kvm_io_bus_write(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
138 int len
, const void *val
);
139 int kvm_io_bus_read(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
, int len
,
141 int kvm_io_bus_register_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
142 int len
, struct kvm_io_device
*dev
);
143 int kvm_io_bus_unregister_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
,
144 struct kvm_io_device
*dev
);
146 #ifdef CONFIG_KVM_ASYNC_PF
147 struct kvm_async_pf
{
148 struct work_struct work
;
149 struct list_head link
;
150 struct list_head queue
;
151 struct kvm_vcpu
*vcpu
;
152 struct mm_struct
*mm
;
155 struct kvm_arch_async_pf arch
;
160 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu
*vcpu
);
161 void kvm_check_async_pf_completion(struct kvm_vcpu
*vcpu
);
162 int kvm_setup_async_pf(struct kvm_vcpu
*vcpu
, gva_t gva
, gfn_t gfn
,
163 struct kvm_arch_async_pf
*arch
);
164 int kvm_async_pf_wakeup_all(struct kvm_vcpu
*vcpu
);
171 READING_SHADOW_PAGE_TABLES
,
175 * Sometimes a large or cross-page mmio needs to be broken up into separate
176 * exits for userspace servicing.
178 struct kvm_mmio_fragment
{
186 #ifdef CONFIG_PREEMPT_NOTIFIERS
187 struct preempt_notifier preempt_notifier
;
193 unsigned long requests
;
194 unsigned long guest_debug
;
200 int guest_fpu_loaded
, guest_xcr0_loaded
;
201 wait_queue_head_t wq
;
205 struct kvm_vcpu_stat stat
;
207 #ifdef CONFIG_HAS_IOMEM
209 int mmio_read_completed
;
211 int mmio_cur_fragment
;
212 int mmio_nr_fragments
;
213 struct kvm_mmio_fragment mmio_fragments
[KVM_MAX_MMIO_FRAGMENTS
];
216 #ifdef CONFIG_KVM_ASYNC_PF
219 struct list_head queue
;
220 struct list_head done
;
225 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
227 * Cpu relax intercept or pause loop exit optimization
228 * in_spin_loop: set when a vcpu does a pause loop exit
229 * or cpu relax intercepted.
230 * dy_eligible: indicates whether vcpu is eligible for directed yield.
237 struct kvm_vcpu_arch arch
;
240 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu
*vcpu
)
242 return cmpxchg(&vcpu
->mode
, IN_GUEST_MODE
, EXITING_GUEST_MODE
);
246 * Some of the bitops functions do not support too long bitmaps.
247 * This number must be determined not to exceed such limits.
249 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
251 struct kvm_memory_slot
{
253 unsigned long npages
;
255 unsigned long *dirty_bitmap
;
256 struct kvm_arch_memory_slot arch
;
257 unsigned long userspace_addr
;
262 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot
*memslot
)
264 return ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
267 struct kvm_kernel_irq_routing_entry
{
270 int (*set
)(struct kvm_kernel_irq_routing_entry
*e
,
271 struct kvm
*kvm
, int irq_source_id
, int level
);
279 struct hlist_node link
;
282 #ifdef __KVM_HAVE_IOAPIC
284 struct kvm_irq_routing_table
{
285 int chip
[KVM_NR_IRQCHIPS
][KVM_IOAPIC_NUM_PINS
];
286 struct kvm_kernel_irq_routing_entry
*rt_entries
;
289 * Array indexed by gsi. Each entry contains list of irq chips
290 * the gsi is connected to.
292 struct hlist_head map
[0];
297 struct kvm_irq_routing_table
{};
301 #ifndef KVM_MEM_SLOTS_NUM
302 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
307 * memslots are not sorted by id anymore, please use id_to_memslot()
308 * to get the memslot by its id.
310 struct kvm_memslots
{
312 struct kvm_memory_slot memslots
[KVM_MEM_SLOTS_NUM
];
313 /* The mapping table from slot id to the index in memslots[]. */
314 int id_to_index
[KVM_MEM_SLOTS_NUM
];
319 struct mutex slots_lock
;
320 struct mm_struct
*mm
; /* userspace tied to this vm */
321 struct kvm_memslots
*memslots
;
322 struct srcu_struct srcu
;
323 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
326 struct kvm_vcpu
*vcpus
[KVM_MAX_VCPUS
];
327 atomic_t online_vcpus
;
328 int last_boosted_vcpu
;
329 struct list_head vm_list
;
331 struct kvm_io_bus
*buses
[KVM_NR_BUSES
];
332 #ifdef CONFIG_HAVE_KVM_EVENTFD
335 struct list_head items
;
336 struct list_head resampler_list
;
337 struct mutex resampler_lock
;
339 struct list_head ioeventfds
;
341 struct kvm_vm_stat stat
;
342 struct kvm_arch arch
;
343 atomic_t users_count
;
344 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
345 struct kvm_coalesced_mmio_ring
*coalesced_mmio_ring
;
346 spinlock_t ring_lock
;
347 struct list_head coalesced_zones
;
350 struct mutex irq_lock
;
351 #ifdef CONFIG_HAVE_KVM_IRQCHIP
353 * Update side is protected by irq_lock and,
354 * if configured, irqfds.lock.
356 struct kvm_irq_routing_table __rcu
*irq_routing
;
357 struct hlist_head mask_notifier_list
;
358 struct hlist_head irq_ack_notifier_list
;
361 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
362 struct mmu_notifier mmu_notifier
;
363 unsigned long mmu_notifier_seq
;
364 long mmu_notifier_count
;
369 #define kvm_err(fmt, ...) \
370 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
371 #define kvm_info(fmt, ...) \
372 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
373 #define kvm_debug(fmt, ...) \
374 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
375 #define kvm_pr_unimpl(fmt, ...) \
376 pr_err_ratelimited("kvm [%i]: " fmt, \
377 task_tgid_nr(current), ## __VA_ARGS__)
379 /* The guest did something we don't support. */
380 #define vcpu_unimpl(vcpu, fmt, ...) \
381 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
383 static inline struct kvm_vcpu
*kvm_get_vcpu(struct kvm
*kvm
, int i
)
386 return kvm
->vcpus
[i
];
389 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
391 idx < atomic_read(&kvm->online_vcpus) && \
392 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
395 #define kvm_for_each_memslot(memslot, slots) \
396 for (memslot = &slots->memslots[0]; \
397 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
400 int kvm_vcpu_init(struct kvm_vcpu
*vcpu
, struct kvm
*kvm
, unsigned id
);
401 void kvm_vcpu_uninit(struct kvm_vcpu
*vcpu
);
403 int __must_check
vcpu_load(struct kvm_vcpu
*vcpu
);
404 void vcpu_put(struct kvm_vcpu
*vcpu
);
406 int kvm_init(void *opaque
, unsigned vcpu_size
, unsigned vcpu_align
,
407 struct module
*module
);
410 void kvm_get_kvm(struct kvm
*kvm
);
411 void kvm_put_kvm(struct kvm
*kvm
);
412 void update_memslots(struct kvm_memslots
*slots
, struct kvm_memory_slot
*new);
414 static inline struct kvm_memslots
*kvm_memslots(struct kvm
*kvm
)
416 return rcu_dereference_check(kvm
->memslots
,
417 srcu_read_lock_held(&kvm
->srcu
)
418 || lockdep_is_held(&kvm
->slots_lock
));
421 static inline struct kvm_memory_slot
*
422 id_to_memslot(struct kvm_memslots
*slots
, int id
)
424 int index
= slots
->id_to_index
[id
];
425 struct kvm_memory_slot
*slot
;
427 slot
= &slots
->memslots
[index
];
429 WARN_ON(slot
->id
!= id
);
433 int kvm_set_memory_region(struct kvm
*kvm
,
434 struct kvm_userspace_memory_region
*mem
,
436 int __kvm_set_memory_region(struct kvm
*kvm
,
437 struct kvm_userspace_memory_region
*mem
,
439 void kvm_arch_free_memslot(struct kvm_memory_slot
*free
,
440 struct kvm_memory_slot
*dont
);
441 int kvm_arch_create_memslot(struct kvm_memory_slot
*slot
, unsigned long npages
);
442 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
443 struct kvm_memory_slot
*memslot
,
444 struct kvm_memory_slot old
,
445 struct kvm_userspace_memory_region
*mem
,
447 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
448 struct kvm_userspace_memory_region
*mem
,
449 struct kvm_memory_slot old
,
451 bool kvm_largepages_enabled(void);
452 void kvm_disable_largepages(void);
453 /* flush all memory translations */
454 void kvm_arch_flush_shadow_all(struct kvm
*kvm
);
455 /* flush memory translations pointing to 'slot' */
456 void kvm_arch_flush_shadow_memslot(struct kvm
*kvm
,
457 struct kvm_memory_slot
*slot
);
459 int gfn_to_page_many_atomic(struct kvm
*kvm
, gfn_t gfn
, struct page
**pages
,
462 struct page
*gfn_to_page(struct kvm
*kvm
, gfn_t gfn
);
463 unsigned long gfn_to_hva(struct kvm
*kvm
, gfn_t gfn
);
464 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
465 void kvm_release_page_clean(struct page
*page
);
466 void kvm_release_page_dirty(struct page
*page
);
467 void kvm_set_page_dirty(struct page
*page
);
468 void kvm_set_page_accessed(struct page
*page
);
470 pfn_t
gfn_to_pfn_atomic(struct kvm
*kvm
, gfn_t gfn
);
471 pfn_t
gfn_to_pfn_async(struct kvm
*kvm
, gfn_t gfn
, bool *async
,
472 bool write_fault
, bool *writable
);
473 pfn_t
gfn_to_pfn(struct kvm
*kvm
, gfn_t gfn
);
474 pfn_t
gfn_to_pfn_prot(struct kvm
*kvm
, gfn_t gfn
, bool write_fault
,
476 pfn_t
gfn_to_pfn_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
477 pfn_t
gfn_to_pfn_memslot_atomic(struct kvm_memory_slot
*slot
, gfn_t gfn
);
479 void kvm_release_pfn_dirty(pfn_t pfn
);
480 void kvm_release_pfn_clean(pfn_t pfn
);
481 void kvm_set_pfn_dirty(pfn_t pfn
);
482 void kvm_set_pfn_accessed(pfn_t pfn
);
483 void kvm_get_pfn(pfn_t pfn
);
485 int kvm_read_guest_page(struct kvm
*kvm
, gfn_t gfn
, void *data
, int offset
,
487 int kvm_read_guest_atomic(struct kvm
*kvm
, gpa_t gpa
, void *data
,
489 int kvm_read_guest(struct kvm
*kvm
, gpa_t gpa
, void *data
, unsigned long len
);
490 int kvm_read_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
491 void *data
, unsigned long len
);
492 int kvm_write_guest_page(struct kvm
*kvm
, gfn_t gfn
, const void *data
,
493 int offset
, int len
);
494 int kvm_write_guest(struct kvm
*kvm
, gpa_t gpa
, const void *data
,
496 int kvm_write_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
497 void *data
, unsigned long len
);
498 int kvm_gfn_to_hva_cache_init(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
500 int kvm_clear_guest_page(struct kvm
*kvm
, gfn_t gfn
, int offset
, int len
);
501 int kvm_clear_guest(struct kvm
*kvm
, gpa_t gpa
, unsigned long len
);
502 struct kvm_memory_slot
*gfn_to_memslot(struct kvm
*kvm
, gfn_t gfn
);
503 int kvm_is_visible_gfn(struct kvm
*kvm
, gfn_t gfn
);
504 unsigned long kvm_host_page_size(struct kvm
*kvm
, gfn_t gfn
);
505 void mark_page_dirty(struct kvm
*kvm
, gfn_t gfn
);
506 void mark_page_dirty_in_slot(struct kvm
*kvm
, struct kvm_memory_slot
*memslot
,
509 void kvm_vcpu_block(struct kvm_vcpu
*vcpu
);
510 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
511 bool kvm_vcpu_yield_to(struct kvm_vcpu
*target
);
512 void kvm_vcpu_on_spin(struct kvm_vcpu
*vcpu
);
513 void kvm_resched(struct kvm_vcpu
*vcpu
);
514 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
);
515 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
);
517 void kvm_flush_remote_tlbs(struct kvm
*kvm
);
518 void kvm_reload_remote_mmus(struct kvm
*kvm
);
520 long kvm_arch_dev_ioctl(struct file
*filp
,
521 unsigned int ioctl
, unsigned long arg
);
522 long kvm_arch_vcpu_ioctl(struct file
*filp
,
523 unsigned int ioctl
, unsigned long arg
);
524 int kvm_arch_vcpu_fault(struct kvm_vcpu
*vcpu
, struct vm_fault
*vmf
);
526 int kvm_dev_ioctl_check_extension(long ext
);
528 int kvm_get_dirty_log(struct kvm
*kvm
,
529 struct kvm_dirty_log
*log
, int *is_dirty
);
530 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
531 struct kvm_dirty_log
*log
);
533 int kvm_vm_ioctl_set_memory_region(struct kvm
*kvm
,
535 kvm_userspace_memory_region
*mem
,
537 int kvm_vm_ioctl_irq_line(struct kvm
*kvm
, struct kvm_irq_level
*irq_level
);
538 long kvm_arch_vm_ioctl(struct file
*filp
,
539 unsigned int ioctl
, unsigned long arg
);
541 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
542 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
544 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
545 struct kvm_translation
*tr
);
547 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
548 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
549 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
550 struct kvm_sregs
*sregs
);
551 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
552 struct kvm_sregs
*sregs
);
553 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
554 struct kvm_mp_state
*mp_state
);
555 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
556 struct kvm_mp_state
*mp_state
);
557 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
558 struct kvm_guest_debug
*dbg
);
559 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
);
561 int kvm_arch_init(void *opaque
);
562 void kvm_arch_exit(void);
564 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
);
565 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
);
567 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
);
568 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
);
569 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
);
570 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
, unsigned int id
);
571 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
);
572 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
);
574 int kvm_arch_vcpu_reset(struct kvm_vcpu
*vcpu
);
575 int kvm_arch_hardware_enable(void *garbage
);
576 void kvm_arch_hardware_disable(void *garbage
);
577 int kvm_arch_hardware_setup(void);
578 void kvm_arch_hardware_unsetup(void);
579 void kvm_arch_check_processor_compat(void *rtn
);
580 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
);
581 int kvm_arch_vcpu_should_kick(struct kvm_vcpu
*vcpu
);
583 void kvm_free_physmem(struct kvm
*kvm
);
585 void *kvm_kvzalloc(unsigned long size
);
586 void kvm_kvfree(const void *addr
);
588 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
589 static inline struct kvm
*kvm_arch_alloc_vm(void)
591 return kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
594 static inline void kvm_arch_free_vm(struct kvm
*kvm
)
600 static inline wait_queue_head_t
*kvm_arch_vcpu_wq(struct kvm_vcpu
*vcpu
)
602 #ifdef __KVM_HAVE_ARCH_WQP
603 return vcpu
->arch
.wqp
;
609 int kvm_arch_init_vm(struct kvm
*kvm
, unsigned long type
);
610 void kvm_arch_destroy_vm(struct kvm
*kvm
);
611 void kvm_free_all_assigned_devices(struct kvm
*kvm
);
612 void kvm_arch_sync_events(struct kvm
*kvm
);
614 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
);
615 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
617 bool kvm_is_mmio_pfn(pfn_t pfn
);
619 struct kvm_irq_ack_notifier
{
620 struct hlist_node link
;
622 void (*irq_acked
)(struct kvm_irq_ack_notifier
*kian
);
625 struct kvm_assigned_dev_kernel
{
626 struct kvm_irq_ack_notifier ack_notifier
;
627 struct list_head list
;
632 unsigned int entries_nr
;
634 bool host_irq_disabled
;
636 struct msix_entry
*host_msix_entries
;
638 struct msix_entry
*guest_msix_entries
;
639 unsigned long irq_requested_type
;
644 spinlock_t intx_lock
;
645 spinlock_t intx_mask_lock
;
647 struct pci_saved_state
*pci_saved_state
;
650 struct kvm_irq_mask_notifier
{
651 void (*func
)(struct kvm_irq_mask_notifier
*kimn
, bool masked
);
653 struct hlist_node link
;
656 void kvm_register_irq_mask_notifier(struct kvm
*kvm
, int irq
,
657 struct kvm_irq_mask_notifier
*kimn
);
658 void kvm_unregister_irq_mask_notifier(struct kvm
*kvm
, int irq
,
659 struct kvm_irq_mask_notifier
*kimn
);
660 void kvm_fire_mask_notifiers(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
,
663 #ifdef __KVM_HAVE_IOAPIC
664 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic
*ioapic
,
665 union kvm_ioapic_redirect_entry
*entry
,
666 unsigned long *deliver_bitmask
);
668 int kvm_set_irq(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
);
669 int kvm_set_msi(struct kvm_kernel_irq_routing_entry
*irq_entry
, struct kvm
*kvm
,
670 int irq_source_id
, int level
);
671 void kvm_notify_acked_irq(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
672 void kvm_register_irq_ack_notifier(struct kvm
*kvm
,
673 struct kvm_irq_ack_notifier
*kian
);
674 void kvm_unregister_irq_ack_notifier(struct kvm
*kvm
,
675 struct kvm_irq_ack_notifier
*kian
);
676 int kvm_request_irq_source_id(struct kvm
*kvm
);
677 void kvm_free_irq_source_id(struct kvm
*kvm
, int irq_source_id
);
679 /* For vcpu->arch.iommu_flags */
680 #define KVM_IOMMU_CACHE_COHERENCY 0x1
682 #ifdef CONFIG_IOMMU_API
683 int kvm_iommu_map_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
684 void kvm_iommu_unmap_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
685 int kvm_iommu_map_guest(struct kvm
*kvm
);
686 int kvm_iommu_unmap_guest(struct kvm
*kvm
);
687 int kvm_assign_device(struct kvm
*kvm
,
688 struct kvm_assigned_dev_kernel
*assigned_dev
);
689 int kvm_deassign_device(struct kvm
*kvm
,
690 struct kvm_assigned_dev_kernel
*assigned_dev
);
691 #else /* CONFIG_IOMMU_API */
692 static inline int kvm_iommu_map_pages(struct kvm
*kvm
,
693 struct kvm_memory_slot
*slot
)
698 static inline void kvm_iommu_unmap_pages(struct kvm
*kvm
,
699 struct kvm_memory_slot
*slot
)
703 static inline int kvm_iommu_map_guest(struct kvm
*kvm
)
708 static inline int kvm_iommu_unmap_guest(struct kvm
*kvm
)
713 static inline int kvm_assign_device(struct kvm
*kvm
,
714 struct kvm_assigned_dev_kernel
*assigned_dev
)
719 static inline int kvm_deassign_device(struct kvm
*kvm
,
720 struct kvm_assigned_dev_kernel
*assigned_dev
)
724 #endif /* CONFIG_IOMMU_API */
726 static inline void kvm_guest_enter(void)
728 BUG_ON(preemptible());
729 vtime_account(current
);
730 current
->flags
|= PF_VCPU
;
731 /* KVM does not hold any references to rcu protected data when it
732 * switches CPU into a guest mode. In fact switching to a guest mode
733 * is very similar to exiting to userspase from rcu point of view. In
734 * addition CPU may stay in a guest mode for quite a long time (up to
735 * one time slice). Lets treat guest mode as quiescent state, just like
736 * we do with user-mode execution.
738 rcu_virt_note_context_switch(smp_processor_id());
741 static inline void kvm_guest_exit(void)
743 vtime_account(current
);
744 current
->flags
&= ~PF_VCPU
;
748 * search_memslots() and __gfn_to_memslot() are here because they are
749 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
750 * gfn_to_memslot() itself isn't here as an inline because that would
751 * bloat other code too much.
753 static inline struct kvm_memory_slot
*
754 search_memslots(struct kvm_memslots
*slots
, gfn_t gfn
)
756 struct kvm_memory_slot
*memslot
;
758 kvm_for_each_memslot(memslot
, slots
)
759 if (gfn
>= memslot
->base_gfn
&&
760 gfn
< memslot
->base_gfn
+ memslot
->npages
)
766 static inline struct kvm_memory_slot
*
767 __gfn_to_memslot(struct kvm_memslots
*slots
, gfn_t gfn
)
769 return search_memslots(slots
, gfn
);
772 static inline unsigned long
773 __gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
)
775 return slot
->userspace_addr
+ (gfn
- slot
->base_gfn
) * PAGE_SIZE
;
778 static inline int memslot_id(struct kvm
*kvm
, gfn_t gfn
)
780 return gfn_to_memslot(kvm
, gfn
)->id
;
783 static inline gfn_t
gfn_to_index(gfn_t gfn
, gfn_t base_gfn
, int level
)
785 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
786 return (gfn
>> KVM_HPAGE_GFN_SHIFT(level
)) -
787 (base_gfn
>> KVM_HPAGE_GFN_SHIFT(level
));
791 hva_to_gfn_memslot(unsigned long hva
, struct kvm_memory_slot
*slot
)
793 gfn_t gfn_offset
= (hva
- slot
->userspace_addr
) >> PAGE_SHIFT
;
795 return slot
->base_gfn
+ gfn_offset
;
798 static inline gpa_t
gfn_to_gpa(gfn_t gfn
)
800 return (gpa_t
)gfn
<< PAGE_SHIFT
;
803 static inline gfn_t
gpa_to_gfn(gpa_t gpa
)
805 return (gfn_t
)(gpa
>> PAGE_SHIFT
);
808 static inline hpa_t
pfn_to_hpa(pfn_t pfn
)
810 return (hpa_t
)pfn
<< PAGE_SHIFT
;
813 static inline void kvm_migrate_timers(struct kvm_vcpu
*vcpu
)
815 set_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
);
823 struct kvm_stats_debugfs_item
{
826 enum kvm_stat_kind kind
;
827 struct dentry
*dentry
;
829 extern struct kvm_stats_debugfs_item debugfs_entries
[];
830 extern struct dentry
*kvm_debugfs_dir
;
832 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
833 static inline int mmu_notifier_retry(struct kvm_vcpu
*vcpu
, unsigned long mmu_seq
)
835 if (unlikely(vcpu
->kvm
->mmu_notifier_count
))
838 * Ensure the read of mmu_notifier_count happens before the read
839 * of mmu_notifier_seq. This interacts with the smp_wmb() in
840 * mmu_notifier_invalidate_range_end to make sure that the caller
841 * either sees the old (non-zero) value of mmu_notifier_count or
842 * the new (incremented) value of mmu_notifier_seq.
843 * PowerPC Book3s HV KVM calls this under a per-page lock
844 * rather than under kvm->mmu_lock, for scalability, so
845 * can't rely on kvm->mmu_lock to keep things ordered.
848 if (vcpu
->kvm
->mmu_notifier_seq
!= mmu_seq
)
854 #ifdef KVM_CAP_IRQ_ROUTING
856 #define KVM_MAX_IRQ_ROUTES 1024
858 int kvm_setup_default_irq_routing(struct kvm
*kvm
);
859 int kvm_set_irq_routing(struct kvm
*kvm
,
860 const struct kvm_irq_routing_entry
*entries
,
863 void kvm_free_irq_routing(struct kvm
*kvm
);
865 int kvm_send_userspace_msi(struct kvm
*kvm
, struct kvm_msi
*msi
);
869 static inline void kvm_free_irq_routing(struct kvm
*kvm
) {}
873 #ifdef CONFIG_HAVE_KVM_EVENTFD
875 void kvm_eventfd_init(struct kvm
*kvm
);
876 int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
);
877 void kvm_irqfd_release(struct kvm
*kvm
);
878 void kvm_irq_routing_update(struct kvm
*, struct kvm_irq_routing_table
*);
879 int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
);
883 static inline void kvm_eventfd_init(struct kvm
*kvm
) {}
885 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
890 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
892 #ifdef CONFIG_HAVE_KVM_IRQCHIP
893 static inline void kvm_irq_routing_update(struct kvm
*kvm
,
894 struct kvm_irq_routing_table
*irq_rt
)
896 rcu_assign_pointer(kvm
->irq_routing
, irq_rt
);
900 static inline int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
)
905 #endif /* CONFIG_HAVE_KVM_EVENTFD */
907 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
908 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu
*vcpu
)
910 return vcpu
->kvm
->bsp_vcpu_id
== vcpu
->vcpu_id
;
913 bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
);
917 static inline bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
) { return true; }
921 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
923 long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
928 static inline long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
936 static inline void kvm_make_request(int req
, struct kvm_vcpu
*vcpu
)
938 set_bit(req
, &vcpu
->requests
);
941 static inline bool kvm_check_request(int req
, struct kvm_vcpu
*vcpu
)
943 if (test_bit(req
, &vcpu
->requests
)) {
944 clear_bit(req
, &vcpu
->requests
);
951 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
953 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
955 vcpu
->spin_loop
.in_spin_loop
= val
;
957 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
959 vcpu
->spin_loop
.dy_eligible
= val
;
962 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
964 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
968 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
972 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu
*vcpu
)
977 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */