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 bit 62 ~ bit 52 to indicate the error pfn,
51 * mask bit 63 to indicate the noslot pfn.
53 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
54 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
55 #define KVM_PFN_NOSLOT (0x1ULL << 63)
57 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
58 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
59 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
62 * error pfns indicate that the gfn is in slot but faild to
63 * translate it to pfn on host.
65 static inline bool is_error_pfn(pfn_t pfn
)
67 return !!(pfn
& KVM_PFN_ERR_MASK
);
71 * error_noslot pfns indicate that the gfn can not be
72 * translated to pfn - it is not in slot or failed to
73 * translate it to pfn.
75 static inline bool is_error_noslot_pfn(pfn_t pfn
)
77 return !!(pfn
& KVM_PFN_ERR_NOSLOT_MASK
);
80 /* noslot pfn indicates that the gfn is not in slot. */
81 static inline bool is_noslot_pfn(pfn_t pfn
)
83 return pfn
== KVM_PFN_NOSLOT
;
86 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
87 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
89 static inline bool kvm_is_error_hva(unsigned long addr
)
91 return addr
>= PAGE_OFFSET
;
94 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
96 static inline bool is_error_page(struct page
*page
)
102 * vcpu->requests bit members
104 #define KVM_REQ_TLB_FLUSH 0
105 #define KVM_REQ_MIGRATE_TIMER 1
106 #define KVM_REQ_REPORT_TPR_ACCESS 2
107 #define KVM_REQ_MMU_RELOAD 3
108 #define KVM_REQ_TRIPLE_FAULT 4
109 #define KVM_REQ_PENDING_TIMER 5
110 #define KVM_REQ_UNHALT 6
111 #define KVM_REQ_MMU_SYNC 7
112 #define KVM_REQ_CLOCK_UPDATE 8
113 #define KVM_REQ_KICK 9
114 #define KVM_REQ_DEACTIVATE_FPU 10
115 #define KVM_REQ_EVENT 11
116 #define KVM_REQ_APF_HALT 12
117 #define KVM_REQ_STEAL_UPDATE 13
118 #define KVM_REQ_NMI 14
119 #define KVM_REQ_IMMEDIATE_EXIT 15
120 #define KVM_REQ_PMU 16
121 #define KVM_REQ_PMI 17
122 #define KVM_REQ_WATCHDOG 18
123 #define KVM_REQ_MASTERCLOCK_UPDATE 19
124 #define KVM_REQ_MCLOCK_INPROGRESS 20
126 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
127 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
131 extern struct kmem_cache
*kvm_vcpu_cache
;
133 struct kvm_io_range
{
136 struct kvm_io_device
*dev
;
139 #define NR_IOBUS_DEVS 1000
143 struct kvm_io_range range
[];
152 int kvm_io_bus_write(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
153 int len
, const void *val
);
154 int kvm_io_bus_read(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
, int len
,
156 int kvm_io_bus_register_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
157 int len
, struct kvm_io_device
*dev
);
158 int kvm_io_bus_unregister_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
,
159 struct kvm_io_device
*dev
);
161 #ifdef CONFIG_KVM_ASYNC_PF
162 struct kvm_async_pf
{
163 struct work_struct work
;
164 struct list_head link
;
165 struct list_head queue
;
166 struct kvm_vcpu
*vcpu
;
167 struct mm_struct
*mm
;
170 struct kvm_arch_async_pf arch
;
175 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu
*vcpu
);
176 void kvm_check_async_pf_completion(struct kvm_vcpu
*vcpu
);
177 int kvm_setup_async_pf(struct kvm_vcpu
*vcpu
, gva_t gva
, gfn_t gfn
,
178 struct kvm_arch_async_pf
*arch
);
179 int kvm_async_pf_wakeup_all(struct kvm_vcpu
*vcpu
);
186 READING_SHADOW_PAGE_TABLES
,
190 * Sometimes a large or cross-page mmio needs to be broken up into separate
191 * exits for userspace servicing.
193 struct kvm_mmio_fragment
{
201 #ifdef CONFIG_PREEMPT_NOTIFIERS
202 struct preempt_notifier preempt_notifier
;
208 unsigned long requests
;
209 unsigned long guest_debug
;
215 int guest_fpu_loaded
, guest_xcr0_loaded
;
216 wait_queue_head_t wq
;
220 struct kvm_vcpu_stat stat
;
222 #ifdef CONFIG_HAS_IOMEM
224 int mmio_read_completed
;
226 int mmio_cur_fragment
;
227 int mmio_nr_fragments
;
228 struct kvm_mmio_fragment mmio_fragments
[KVM_MAX_MMIO_FRAGMENTS
];
231 #ifdef CONFIG_KVM_ASYNC_PF
234 struct list_head queue
;
235 struct list_head done
;
240 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
242 * Cpu relax intercept or pause loop exit optimization
243 * in_spin_loop: set when a vcpu does a pause loop exit
244 * or cpu relax intercepted.
245 * dy_eligible: indicates whether vcpu is eligible for directed yield.
252 struct kvm_vcpu_arch arch
;
255 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu
*vcpu
)
257 return cmpxchg(&vcpu
->mode
, IN_GUEST_MODE
, EXITING_GUEST_MODE
);
261 * Some of the bitops functions do not support too long bitmaps.
262 * This number must be determined not to exceed such limits.
264 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
266 struct kvm_memory_slot
{
268 unsigned long npages
;
270 unsigned long *dirty_bitmap
;
271 struct kvm_arch_memory_slot arch
;
272 unsigned long userspace_addr
;
277 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot
*memslot
)
279 return ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
282 struct kvm_kernel_irq_routing_entry
{
285 int (*set
)(struct kvm_kernel_irq_routing_entry
*e
,
286 struct kvm
*kvm
, int irq_source_id
, int level
);
294 struct hlist_node link
;
297 #ifdef __KVM_HAVE_IOAPIC
299 struct kvm_irq_routing_table
{
300 int chip
[KVM_NR_IRQCHIPS
][KVM_IOAPIC_NUM_PINS
];
301 struct kvm_kernel_irq_routing_entry
*rt_entries
;
304 * Array indexed by gsi. Each entry contains list of irq chips
305 * the gsi is connected to.
307 struct hlist_head map
[0];
312 struct kvm_irq_routing_table
{};
316 #ifndef KVM_MEM_SLOTS_NUM
317 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
322 * memslots are not sorted by id anymore, please use id_to_memslot()
323 * to get the memslot by its id.
325 struct kvm_memslots
{
327 struct kvm_memory_slot memslots
[KVM_MEM_SLOTS_NUM
];
328 /* The mapping table from slot id to the index in memslots[]. */
329 int id_to_index
[KVM_MEM_SLOTS_NUM
];
334 struct mutex slots_lock
;
335 struct mm_struct
*mm
; /* userspace tied to this vm */
336 struct kvm_memslots
*memslots
;
337 struct srcu_struct srcu
;
338 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
341 struct kvm_vcpu
*vcpus
[KVM_MAX_VCPUS
];
342 atomic_t online_vcpus
;
343 int last_boosted_vcpu
;
344 struct list_head vm_list
;
346 struct kvm_io_bus
*buses
[KVM_NR_BUSES
];
347 #ifdef CONFIG_HAVE_KVM_EVENTFD
350 struct list_head items
;
351 struct list_head resampler_list
;
352 struct mutex resampler_lock
;
354 struct list_head ioeventfds
;
356 struct kvm_vm_stat stat
;
357 struct kvm_arch arch
;
358 atomic_t users_count
;
359 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
360 struct kvm_coalesced_mmio_ring
*coalesced_mmio_ring
;
361 spinlock_t ring_lock
;
362 struct list_head coalesced_zones
;
365 struct mutex irq_lock
;
366 #ifdef CONFIG_HAVE_KVM_IRQCHIP
368 * Update side is protected by irq_lock and,
369 * if configured, irqfds.lock.
371 struct kvm_irq_routing_table __rcu
*irq_routing
;
372 struct hlist_head mask_notifier_list
;
373 struct hlist_head irq_ack_notifier_list
;
376 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
377 struct mmu_notifier mmu_notifier
;
378 unsigned long mmu_notifier_seq
;
379 long mmu_notifier_count
;
384 #define kvm_err(fmt, ...) \
385 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
386 #define kvm_info(fmt, ...) \
387 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
388 #define kvm_debug(fmt, ...) \
389 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
390 #define kvm_pr_unimpl(fmt, ...) \
391 pr_err_ratelimited("kvm [%i]: " fmt, \
392 task_tgid_nr(current), ## __VA_ARGS__)
394 /* The guest did something we don't support. */
395 #define vcpu_unimpl(vcpu, fmt, ...) \
396 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
398 static inline struct kvm_vcpu
*kvm_get_vcpu(struct kvm
*kvm
, int i
)
401 return kvm
->vcpus
[i
];
404 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
406 idx < atomic_read(&kvm->online_vcpus) && \
407 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
410 #define kvm_for_each_memslot(memslot, slots) \
411 for (memslot = &slots->memslots[0]; \
412 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
415 int kvm_vcpu_init(struct kvm_vcpu
*vcpu
, struct kvm
*kvm
, unsigned id
);
416 void kvm_vcpu_uninit(struct kvm_vcpu
*vcpu
);
418 int __must_check
vcpu_load(struct kvm_vcpu
*vcpu
);
419 void vcpu_put(struct kvm_vcpu
*vcpu
);
421 int kvm_init(void *opaque
, unsigned vcpu_size
, unsigned vcpu_align
,
422 struct module
*module
);
425 void kvm_get_kvm(struct kvm
*kvm
);
426 void kvm_put_kvm(struct kvm
*kvm
);
427 void update_memslots(struct kvm_memslots
*slots
, struct kvm_memory_slot
*new);
429 static inline struct kvm_memslots
*kvm_memslots(struct kvm
*kvm
)
431 return rcu_dereference_check(kvm
->memslots
,
432 srcu_read_lock_held(&kvm
->srcu
)
433 || lockdep_is_held(&kvm
->slots_lock
));
436 static inline struct kvm_memory_slot
*
437 id_to_memslot(struct kvm_memslots
*slots
, int id
)
439 int index
= slots
->id_to_index
[id
];
440 struct kvm_memory_slot
*slot
;
442 slot
= &slots
->memslots
[index
];
444 WARN_ON(slot
->id
!= id
);
448 int kvm_set_memory_region(struct kvm
*kvm
,
449 struct kvm_userspace_memory_region
*mem
,
451 int __kvm_set_memory_region(struct kvm
*kvm
,
452 struct kvm_userspace_memory_region
*mem
,
454 void kvm_arch_free_memslot(struct kvm_memory_slot
*free
,
455 struct kvm_memory_slot
*dont
);
456 int kvm_arch_create_memslot(struct kvm_memory_slot
*slot
, unsigned long npages
);
457 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
458 struct kvm_memory_slot
*memslot
,
459 struct kvm_memory_slot old
,
460 struct kvm_userspace_memory_region
*mem
,
462 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
463 struct kvm_userspace_memory_region
*mem
,
464 struct kvm_memory_slot old
,
466 bool kvm_largepages_enabled(void);
467 void kvm_disable_largepages(void);
468 /* flush all memory translations */
469 void kvm_arch_flush_shadow_all(struct kvm
*kvm
);
470 /* flush memory translations pointing to 'slot' */
471 void kvm_arch_flush_shadow_memslot(struct kvm
*kvm
,
472 struct kvm_memory_slot
*slot
);
474 int gfn_to_page_many_atomic(struct kvm
*kvm
, gfn_t gfn
, struct page
**pages
,
477 struct page
*gfn_to_page(struct kvm
*kvm
, gfn_t gfn
);
478 unsigned long gfn_to_hva(struct kvm
*kvm
, gfn_t gfn
);
479 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
480 void kvm_release_page_clean(struct page
*page
);
481 void kvm_release_page_dirty(struct page
*page
);
482 void kvm_set_page_dirty(struct page
*page
);
483 void kvm_set_page_accessed(struct page
*page
);
485 pfn_t
gfn_to_pfn_atomic(struct kvm
*kvm
, gfn_t gfn
);
486 pfn_t
gfn_to_pfn_async(struct kvm
*kvm
, gfn_t gfn
, bool *async
,
487 bool write_fault
, bool *writable
);
488 pfn_t
gfn_to_pfn(struct kvm
*kvm
, gfn_t gfn
);
489 pfn_t
gfn_to_pfn_prot(struct kvm
*kvm
, gfn_t gfn
, bool write_fault
,
491 pfn_t
gfn_to_pfn_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
492 pfn_t
gfn_to_pfn_memslot_atomic(struct kvm_memory_slot
*slot
, gfn_t gfn
);
494 void kvm_release_pfn_dirty(pfn_t pfn
);
495 void kvm_release_pfn_clean(pfn_t pfn
);
496 void kvm_set_pfn_dirty(pfn_t pfn
);
497 void kvm_set_pfn_accessed(pfn_t pfn
);
498 void kvm_get_pfn(pfn_t pfn
);
500 int kvm_read_guest_page(struct kvm
*kvm
, gfn_t gfn
, void *data
, int offset
,
502 int kvm_read_guest_atomic(struct kvm
*kvm
, gpa_t gpa
, void *data
,
504 int kvm_read_guest(struct kvm
*kvm
, gpa_t gpa
, void *data
, unsigned long len
);
505 int kvm_read_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
506 void *data
, unsigned long len
);
507 int kvm_write_guest_page(struct kvm
*kvm
, gfn_t gfn
, const void *data
,
508 int offset
, int len
);
509 int kvm_write_guest(struct kvm
*kvm
, gpa_t gpa
, const void *data
,
511 int kvm_write_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
512 void *data
, unsigned long len
);
513 int kvm_gfn_to_hva_cache_init(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
515 int kvm_clear_guest_page(struct kvm
*kvm
, gfn_t gfn
, int offset
, int len
);
516 int kvm_clear_guest(struct kvm
*kvm
, gpa_t gpa
, unsigned long len
);
517 struct kvm_memory_slot
*gfn_to_memslot(struct kvm
*kvm
, gfn_t gfn
);
518 int kvm_is_visible_gfn(struct kvm
*kvm
, gfn_t gfn
);
519 unsigned long kvm_host_page_size(struct kvm
*kvm
, gfn_t gfn
);
520 void mark_page_dirty(struct kvm
*kvm
, gfn_t gfn
);
521 void mark_page_dirty_in_slot(struct kvm
*kvm
, struct kvm_memory_slot
*memslot
,
524 void kvm_vcpu_block(struct kvm_vcpu
*vcpu
);
525 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
526 bool kvm_vcpu_yield_to(struct kvm_vcpu
*target
);
527 void kvm_vcpu_on_spin(struct kvm_vcpu
*vcpu
);
528 void kvm_resched(struct kvm_vcpu
*vcpu
);
529 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
);
530 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
);
532 void kvm_flush_remote_tlbs(struct kvm
*kvm
);
533 void kvm_reload_remote_mmus(struct kvm
*kvm
);
534 void kvm_make_mclock_inprogress_request(struct kvm
*kvm
);
536 long kvm_arch_dev_ioctl(struct file
*filp
,
537 unsigned int ioctl
, unsigned long arg
);
538 long kvm_arch_vcpu_ioctl(struct file
*filp
,
539 unsigned int ioctl
, unsigned long arg
);
540 int kvm_arch_vcpu_fault(struct kvm_vcpu
*vcpu
, struct vm_fault
*vmf
);
542 int kvm_dev_ioctl_check_extension(long ext
);
544 int kvm_get_dirty_log(struct kvm
*kvm
,
545 struct kvm_dirty_log
*log
, int *is_dirty
);
546 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
547 struct kvm_dirty_log
*log
);
549 int kvm_vm_ioctl_set_memory_region(struct kvm
*kvm
,
551 kvm_userspace_memory_region
*mem
,
553 int kvm_vm_ioctl_irq_line(struct kvm
*kvm
, struct kvm_irq_level
*irq_level
);
554 long kvm_arch_vm_ioctl(struct file
*filp
,
555 unsigned int ioctl
, unsigned long arg
);
557 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
558 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
560 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
561 struct kvm_translation
*tr
);
563 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
564 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
565 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
566 struct kvm_sregs
*sregs
);
567 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
568 struct kvm_sregs
*sregs
);
569 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
570 struct kvm_mp_state
*mp_state
);
571 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
572 struct kvm_mp_state
*mp_state
);
573 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
574 struct kvm_guest_debug
*dbg
);
575 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
);
577 int kvm_arch_init(void *opaque
);
578 void kvm_arch_exit(void);
580 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
);
581 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
);
583 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
);
584 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
);
585 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
);
586 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
, unsigned int id
);
587 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
);
588 int kvm_arch_vcpu_postcreate(struct kvm_vcpu
*vcpu
);
589 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
);
591 int kvm_arch_hardware_enable(void *garbage
);
592 void kvm_arch_hardware_disable(void *garbage
);
593 int kvm_arch_hardware_setup(void);
594 void kvm_arch_hardware_unsetup(void);
595 void kvm_arch_check_processor_compat(void *rtn
);
596 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
);
597 int kvm_arch_vcpu_should_kick(struct kvm_vcpu
*vcpu
);
599 void kvm_free_physmem(struct kvm
*kvm
);
601 void *kvm_kvzalloc(unsigned long size
);
602 void kvm_kvfree(const void *addr
);
604 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
605 static inline struct kvm
*kvm_arch_alloc_vm(void)
607 return kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
610 static inline void kvm_arch_free_vm(struct kvm
*kvm
)
616 static inline wait_queue_head_t
*kvm_arch_vcpu_wq(struct kvm_vcpu
*vcpu
)
618 #ifdef __KVM_HAVE_ARCH_WQP
619 return vcpu
->arch
.wqp
;
625 int kvm_arch_init_vm(struct kvm
*kvm
, unsigned long type
);
626 void kvm_arch_destroy_vm(struct kvm
*kvm
);
627 void kvm_free_all_assigned_devices(struct kvm
*kvm
);
628 void kvm_arch_sync_events(struct kvm
*kvm
);
630 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
);
631 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
633 bool kvm_is_mmio_pfn(pfn_t pfn
);
635 struct kvm_irq_ack_notifier
{
636 struct hlist_node link
;
638 void (*irq_acked
)(struct kvm_irq_ack_notifier
*kian
);
641 struct kvm_assigned_dev_kernel
{
642 struct kvm_irq_ack_notifier ack_notifier
;
643 struct list_head list
;
648 unsigned int entries_nr
;
650 bool host_irq_disabled
;
652 struct msix_entry
*host_msix_entries
;
654 struct msix_entry
*guest_msix_entries
;
655 unsigned long irq_requested_type
;
660 spinlock_t intx_lock
;
661 spinlock_t intx_mask_lock
;
663 struct pci_saved_state
*pci_saved_state
;
666 struct kvm_irq_mask_notifier
{
667 void (*func
)(struct kvm_irq_mask_notifier
*kimn
, bool masked
);
669 struct hlist_node link
;
672 void kvm_register_irq_mask_notifier(struct kvm
*kvm
, int irq
,
673 struct kvm_irq_mask_notifier
*kimn
);
674 void kvm_unregister_irq_mask_notifier(struct kvm
*kvm
, int irq
,
675 struct kvm_irq_mask_notifier
*kimn
);
676 void kvm_fire_mask_notifiers(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
,
679 #ifdef __KVM_HAVE_IOAPIC
680 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic
*ioapic
,
681 union kvm_ioapic_redirect_entry
*entry
,
682 unsigned long *deliver_bitmask
);
684 int kvm_set_irq(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
);
685 int kvm_set_irq_inatomic(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
);
686 int kvm_set_msi(struct kvm_kernel_irq_routing_entry
*irq_entry
, struct kvm
*kvm
,
687 int irq_source_id
, int level
);
688 void kvm_notify_acked_irq(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
689 void kvm_register_irq_ack_notifier(struct kvm
*kvm
,
690 struct kvm_irq_ack_notifier
*kian
);
691 void kvm_unregister_irq_ack_notifier(struct kvm
*kvm
,
692 struct kvm_irq_ack_notifier
*kian
);
693 int kvm_request_irq_source_id(struct kvm
*kvm
);
694 void kvm_free_irq_source_id(struct kvm
*kvm
, int irq_source_id
);
696 /* For vcpu->arch.iommu_flags */
697 #define KVM_IOMMU_CACHE_COHERENCY 0x1
699 #ifdef CONFIG_IOMMU_API
700 int kvm_iommu_map_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
701 void kvm_iommu_unmap_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
702 int kvm_iommu_map_guest(struct kvm
*kvm
);
703 int kvm_iommu_unmap_guest(struct kvm
*kvm
);
704 int kvm_assign_device(struct kvm
*kvm
,
705 struct kvm_assigned_dev_kernel
*assigned_dev
);
706 int kvm_deassign_device(struct kvm
*kvm
,
707 struct kvm_assigned_dev_kernel
*assigned_dev
);
708 #else /* CONFIG_IOMMU_API */
709 static inline int kvm_iommu_map_pages(struct kvm
*kvm
,
710 struct kvm_memory_slot
*slot
)
715 static inline void kvm_iommu_unmap_pages(struct kvm
*kvm
,
716 struct kvm_memory_slot
*slot
)
720 static inline int kvm_iommu_map_guest(struct kvm
*kvm
)
725 static inline int kvm_iommu_unmap_guest(struct kvm
*kvm
)
730 static inline int kvm_assign_device(struct kvm
*kvm
,
731 struct kvm_assigned_dev_kernel
*assigned_dev
)
736 static inline int kvm_deassign_device(struct kvm
*kvm
,
737 struct kvm_assigned_dev_kernel
*assigned_dev
)
741 #endif /* CONFIG_IOMMU_API */
743 static inline void kvm_guest_enter(void)
745 BUG_ON(preemptible());
747 * This is running in ioctl context so we can avoid
748 * the call to vtime_account() with its unnecessary idle check.
750 vtime_account_system_irqsafe(current
);
751 current
->flags
|= PF_VCPU
;
752 /* KVM does not hold any references to rcu protected data when it
753 * switches CPU into a guest mode. In fact switching to a guest mode
754 * is very similar to exiting to userspase from rcu point of view. In
755 * addition CPU may stay in a guest mode for quite a long time (up to
756 * one time slice). Lets treat guest mode as quiescent state, just like
757 * we do with user-mode execution.
759 rcu_virt_note_context_switch(smp_processor_id());
762 static inline void kvm_guest_exit(void)
765 * This is running in ioctl context so we can avoid
766 * the call to vtime_account() with its unnecessary idle check.
768 vtime_account_system_irqsafe(current
);
769 current
->flags
&= ~PF_VCPU
;
773 * search_memslots() and __gfn_to_memslot() are here because they are
774 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
775 * gfn_to_memslot() itself isn't here as an inline because that would
776 * bloat other code too much.
778 static inline struct kvm_memory_slot
*
779 search_memslots(struct kvm_memslots
*slots
, gfn_t gfn
)
781 struct kvm_memory_slot
*memslot
;
783 kvm_for_each_memslot(memslot
, slots
)
784 if (gfn
>= memslot
->base_gfn
&&
785 gfn
< memslot
->base_gfn
+ memslot
->npages
)
791 static inline struct kvm_memory_slot
*
792 __gfn_to_memslot(struct kvm_memslots
*slots
, gfn_t gfn
)
794 return search_memslots(slots
, gfn
);
797 static inline unsigned long
798 __gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
)
800 return slot
->userspace_addr
+ (gfn
- slot
->base_gfn
) * PAGE_SIZE
;
803 static inline int memslot_id(struct kvm
*kvm
, gfn_t gfn
)
805 return gfn_to_memslot(kvm
, gfn
)->id
;
808 static inline gfn_t
gfn_to_index(gfn_t gfn
, gfn_t base_gfn
, int level
)
810 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
811 return (gfn
>> KVM_HPAGE_GFN_SHIFT(level
)) -
812 (base_gfn
>> KVM_HPAGE_GFN_SHIFT(level
));
816 hva_to_gfn_memslot(unsigned long hva
, struct kvm_memory_slot
*slot
)
818 gfn_t gfn_offset
= (hva
- slot
->userspace_addr
) >> PAGE_SHIFT
;
820 return slot
->base_gfn
+ gfn_offset
;
823 static inline gpa_t
gfn_to_gpa(gfn_t gfn
)
825 return (gpa_t
)gfn
<< PAGE_SHIFT
;
828 static inline gfn_t
gpa_to_gfn(gpa_t gpa
)
830 return (gfn_t
)(gpa
>> PAGE_SHIFT
);
833 static inline hpa_t
pfn_to_hpa(pfn_t pfn
)
835 return (hpa_t
)pfn
<< PAGE_SHIFT
;
838 static inline void kvm_migrate_timers(struct kvm_vcpu
*vcpu
)
840 set_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
);
848 struct kvm_stats_debugfs_item
{
851 enum kvm_stat_kind kind
;
852 struct dentry
*dentry
;
854 extern struct kvm_stats_debugfs_item debugfs_entries
[];
855 extern struct dentry
*kvm_debugfs_dir
;
857 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
858 static inline int mmu_notifier_retry(struct kvm
*kvm
, unsigned long mmu_seq
)
860 if (unlikely(kvm
->mmu_notifier_count
))
863 * Ensure the read of mmu_notifier_count happens before the read
864 * of mmu_notifier_seq. This interacts with the smp_wmb() in
865 * mmu_notifier_invalidate_range_end to make sure that the caller
866 * either sees the old (non-zero) value of mmu_notifier_count or
867 * the new (incremented) value of mmu_notifier_seq.
868 * PowerPC Book3s HV KVM calls this under a per-page lock
869 * rather than under kvm->mmu_lock, for scalability, so
870 * can't rely on kvm->mmu_lock to keep things ordered.
873 if (kvm
->mmu_notifier_seq
!= mmu_seq
)
879 #ifdef KVM_CAP_IRQ_ROUTING
881 #define KVM_MAX_IRQ_ROUTES 1024
883 int kvm_setup_default_irq_routing(struct kvm
*kvm
);
884 int kvm_set_irq_routing(struct kvm
*kvm
,
885 const struct kvm_irq_routing_entry
*entries
,
888 void kvm_free_irq_routing(struct kvm
*kvm
);
890 int kvm_send_userspace_msi(struct kvm
*kvm
, struct kvm_msi
*msi
);
894 static inline void kvm_free_irq_routing(struct kvm
*kvm
) {}
898 #ifdef CONFIG_HAVE_KVM_EVENTFD
900 void kvm_eventfd_init(struct kvm
*kvm
);
901 int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
);
903 #ifdef CONFIG_HAVE_KVM_IRQCHIP
904 int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
);
905 void kvm_irqfd_release(struct kvm
*kvm
);
906 void kvm_irq_routing_update(struct kvm
*, struct kvm_irq_routing_table
*);
908 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
913 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
918 static inline void kvm_eventfd_init(struct kvm
*kvm
) {}
920 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
925 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
927 #ifdef CONFIG_HAVE_KVM_IRQCHIP
928 static inline void kvm_irq_routing_update(struct kvm
*kvm
,
929 struct kvm_irq_routing_table
*irq_rt
)
931 rcu_assign_pointer(kvm
->irq_routing
, irq_rt
);
935 static inline int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
)
940 #endif /* CONFIG_HAVE_KVM_EVENTFD */
942 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
943 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu
*vcpu
)
945 return vcpu
->kvm
->bsp_vcpu_id
== vcpu
->vcpu_id
;
948 bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
);
952 static inline bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
) { return true; }
956 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
958 long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
963 static inline long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
971 static inline void kvm_make_request(int req
, struct kvm_vcpu
*vcpu
)
973 set_bit(req
, &vcpu
->requests
);
976 static inline bool kvm_check_request(int req
, struct kvm_vcpu
*vcpu
)
978 if (test_bit(req
, &vcpu
->requests
)) {
979 clear_bit(req
, &vcpu
->requests
);
986 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
988 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
990 vcpu
->spin_loop
.in_spin_loop
= val
;
992 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
994 vcpu
->spin_loop
.dy_eligible
= val
;
997 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
999 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
1003 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
1007 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu
*vcpu
)
1012 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */