5 * This work is licensed under the terms of the GNU GPL, version 2. See
6 * the COPYING file in the top-level directory.
9 #include <linux/types.h>
10 #include <linux/hardirq.h>
11 #include <linux/list.h>
12 #include <linux/mutex.h>
13 #include <linux/spinlock.h>
14 #include <linux/signal.h>
15 #include <linux/sched.h>
16 #include <linux/bug.h>
18 #include <linux/mmu_notifier.h>
19 #include <linux/preempt.h>
20 #include <linux/msi.h>
21 #include <linux/slab.h>
22 #include <linux/rcupdate.h>
23 #include <linux/ratelimit.h>
24 #include <linux/err.h>
25 #include <linux/irqflags.h>
26 #include <asm/signal.h>
28 #include <linux/kvm.h>
29 #include <linux/kvm_para.h>
31 #include <linux/kvm_types.h>
33 #include <asm/kvm_host.h>
36 #define KVM_MMIO_SIZE 8
40 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
41 * in kvm, other bits are visible for userspace which are defined in
42 * include/linux/kvm_h.
44 #define KVM_MEMSLOT_INVALID (1UL << 16)
46 /* Two fragments for cross MMIO pages. */
47 #define KVM_MAX_MMIO_FRAGMENTS 2
50 * For the normal pfn, the highest 12 bits should be zero,
51 * so we can mask bit 62 ~ bit 52 to indicate the error pfn,
52 * mask bit 63 to indicate the noslot pfn.
54 #define KVM_PFN_ERR_MASK (0x7ffULL << 52)
55 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
56 #define KVM_PFN_NOSLOT (0x1ULL << 63)
58 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
59 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
60 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2)
63 * error pfns indicate that the gfn is in slot but faild to
64 * translate it to pfn on host.
66 static inline bool is_error_pfn(pfn_t pfn
)
68 return !!(pfn
& KVM_PFN_ERR_MASK
);
72 * error_noslot pfns indicate that the gfn can not be
73 * translated to pfn - it is not in slot or failed to
74 * translate it to pfn.
76 static inline bool is_error_noslot_pfn(pfn_t pfn
)
78 return !!(pfn
& KVM_PFN_ERR_NOSLOT_MASK
);
81 /* noslot pfn indicates that the gfn is not in slot. */
82 static inline bool is_noslot_pfn(pfn_t pfn
)
84 return pfn
== KVM_PFN_NOSLOT
;
87 #define KVM_HVA_ERR_BAD (PAGE_OFFSET)
88 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
90 static inline bool kvm_is_error_hva(unsigned long addr
)
92 return addr
>= PAGE_OFFSET
;
95 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
97 static inline bool is_error_page(struct page
*page
)
103 * vcpu->requests bit members
105 #define KVM_REQ_TLB_FLUSH 0
106 #define KVM_REQ_MIGRATE_TIMER 1
107 #define KVM_REQ_REPORT_TPR_ACCESS 2
108 #define KVM_REQ_MMU_RELOAD 3
109 #define KVM_REQ_TRIPLE_FAULT 4
110 #define KVM_REQ_PENDING_TIMER 5
111 #define KVM_REQ_UNHALT 6
112 #define KVM_REQ_MMU_SYNC 7
113 #define KVM_REQ_CLOCK_UPDATE 8
114 #define KVM_REQ_KICK 9
115 #define KVM_REQ_DEACTIVATE_FPU 10
116 #define KVM_REQ_EVENT 11
117 #define KVM_REQ_APF_HALT 12
118 #define KVM_REQ_STEAL_UPDATE 13
119 #define KVM_REQ_NMI 14
120 #define KVM_REQ_IMMEDIATE_EXIT 15
121 #define KVM_REQ_PMU 16
122 #define KVM_REQ_PMI 17
123 #define KVM_REQ_WATCHDOG 18
124 #define KVM_REQ_MASTERCLOCK_UPDATE 19
125 #define KVM_REQ_MCLOCK_INPROGRESS 20
126 #define KVM_REQ_EPR_EXIT 21
127 #define KVM_REQ_EOIBITMAP 22
129 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
130 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
134 extern struct kmem_cache
*kvm_vcpu_cache
;
136 struct kvm_io_range
{
139 struct kvm_io_device
*dev
;
142 #define NR_IOBUS_DEVS 1000
146 struct kvm_io_range range
[];
155 int kvm_io_bus_write(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
156 int len
, const void *val
);
157 int kvm_io_bus_read(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
, int len
,
159 int kvm_io_bus_register_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
160 int len
, struct kvm_io_device
*dev
);
161 int kvm_io_bus_unregister_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
,
162 struct kvm_io_device
*dev
);
164 #ifdef CONFIG_KVM_ASYNC_PF
165 struct kvm_async_pf
{
166 struct work_struct work
;
167 struct list_head link
;
168 struct list_head queue
;
169 struct kvm_vcpu
*vcpu
;
170 struct mm_struct
*mm
;
173 struct kvm_arch_async_pf arch
;
178 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu
*vcpu
);
179 void kvm_check_async_pf_completion(struct kvm_vcpu
*vcpu
);
180 int kvm_setup_async_pf(struct kvm_vcpu
*vcpu
, gva_t gva
, gfn_t gfn
,
181 struct kvm_arch_async_pf
*arch
);
182 int kvm_async_pf_wakeup_all(struct kvm_vcpu
*vcpu
);
189 READING_SHADOW_PAGE_TABLES
,
193 * Sometimes a large or cross-page mmio needs to be broken up into separate
194 * exits for userspace servicing.
196 struct kvm_mmio_fragment
{
204 #ifdef CONFIG_PREEMPT_NOTIFIERS
205 struct preempt_notifier preempt_notifier
;
211 unsigned long requests
;
212 unsigned long guest_debug
;
218 int guest_fpu_loaded
, guest_xcr0_loaded
;
219 wait_queue_head_t wq
;
223 struct kvm_vcpu_stat stat
;
225 #ifdef CONFIG_HAS_IOMEM
227 int mmio_read_completed
;
229 int mmio_cur_fragment
;
230 int mmio_nr_fragments
;
231 struct kvm_mmio_fragment mmio_fragments
[KVM_MAX_MMIO_FRAGMENTS
];
234 #ifdef CONFIG_KVM_ASYNC_PF
237 struct list_head queue
;
238 struct list_head done
;
243 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
245 * Cpu relax intercept or pause loop exit optimization
246 * in_spin_loop: set when a vcpu does a pause loop exit
247 * or cpu relax intercepted.
248 * dy_eligible: indicates whether vcpu is eligible for directed yield.
255 struct kvm_vcpu_arch arch
;
258 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu
*vcpu
)
260 return cmpxchg(&vcpu
->mode
, IN_GUEST_MODE
, EXITING_GUEST_MODE
);
264 * Some of the bitops functions do not support too long bitmaps.
265 * This number must be determined not to exceed such limits.
267 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
269 struct kvm_memory_slot
{
271 unsigned long npages
;
272 unsigned long *dirty_bitmap
;
273 struct kvm_arch_memory_slot arch
;
274 unsigned long userspace_addr
;
279 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot
*memslot
)
281 return ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
284 struct kvm_kernel_irq_routing_entry
{
287 int (*set
)(struct kvm_kernel_irq_routing_entry
*e
,
288 struct kvm
*kvm
, int irq_source_id
, int level
);
296 struct hlist_node link
;
299 #ifdef __KVM_HAVE_IOAPIC
301 struct kvm_irq_routing_table
{
302 int chip
[KVM_NR_IRQCHIPS
][KVM_IOAPIC_NUM_PINS
];
303 struct kvm_kernel_irq_routing_entry
*rt_entries
;
306 * Array indexed by gsi. Each entry contains list of irq chips
307 * the gsi is connected to.
309 struct hlist_head map
[0];
314 struct kvm_irq_routing_table
{};
318 #ifndef KVM_PRIVATE_MEM_SLOTS
319 #define KVM_PRIVATE_MEM_SLOTS 0
322 #ifndef KVM_MEM_SLOTS_NUM
323 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
328 * memslots are not sorted by id anymore, please use id_to_memslot()
329 * to get the memslot by its id.
331 struct kvm_memslots
{
333 struct kvm_memory_slot memslots
[KVM_MEM_SLOTS_NUM
];
334 /* The mapping table from slot id to the index in memslots[]. */
335 short id_to_index
[KVM_MEM_SLOTS_NUM
];
340 struct mutex slots_lock
;
341 struct mm_struct
*mm
; /* userspace tied to this vm */
342 struct kvm_memslots
*memslots
;
343 struct srcu_struct srcu
;
344 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
347 struct kvm_vcpu
*vcpus
[KVM_MAX_VCPUS
];
348 atomic_t online_vcpus
;
349 int last_boosted_vcpu
;
350 struct list_head vm_list
;
352 struct kvm_io_bus
*buses
[KVM_NR_BUSES
];
353 #ifdef CONFIG_HAVE_KVM_EVENTFD
356 struct list_head items
;
357 struct list_head resampler_list
;
358 struct mutex resampler_lock
;
360 struct list_head ioeventfds
;
362 struct kvm_vm_stat stat
;
363 struct kvm_arch arch
;
364 atomic_t users_count
;
365 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
366 struct kvm_coalesced_mmio_ring
*coalesced_mmio_ring
;
367 spinlock_t ring_lock
;
368 struct list_head coalesced_zones
;
371 struct mutex irq_lock
;
372 #ifdef CONFIG_HAVE_KVM_IRQCHIP
374 * Update side is protected by irq_lock and,
375 * if configured, irqfds.lock.
377 struct kvm_irq_routing_table __rcu
*irq_routing
;
378 struct hlist_head mask_notifier_list
;
379 struct hlist_head irq_ack_notifier_list
;
382 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
383 struct mmu_notifier mmu_notifier
;
384 unsigned long mmu_notifier_seq
;
385 long mmu_notifier_count
;
390 #define kvm_err(fmt, ...) \
391 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
392 #define kvm_info(fmt, ...) \
393 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
394 #define kvm_debug(fmt, ...) \
395 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
396 #define kvm_pr_unimpl(fmt, ...) \
397 pr_err_ratelimited("kvm [%i]: " fmt, \
398 task_tgid_nr(current), ## __VA_ARGS__)
400 /* The guest did something we don't support. */
401 #define vcpu_unimpl(vcpu, fmt, ...) \
402 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
404 static inline struct kvm_vcpu
*kvm_get_vcpu(struct kvm
*kvm
, int i
)
407 return kvm
->vcpus
[i
];
410 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
412 idx < atomic_read(&kvm->online_vcpus) && \
413 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
416 #define kvm_for_each_memslot(memslot, slots) \
417 for (memslot = &slots->memslots[0]; \
418 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
421 int kvm_vcpu_init(struct kvm_vcpu
*vcpu
, struct kvm
*kvm
, unsigned id
);
422 void kvm_vcpu_uninit(struct kvm_vcpu
*vcpu
);
424 int __must_check
vcpu_load(struct kvm_vcpu
*vcpu
);
425 void vcpu_put(struct kvm_vcpu
*vcpu
);
427 int kvm_init(void *opaque
, unsigned vcpu_size
, unsigned vcpu_align
,
428 struct module
*module
);
431 void kvm_get_kvm(struct kvm
*kvm
);
432 void kvm_put_kvm(struct kvm
*kvm
);
433 void update_memslots(struct kvm_memslots
*slots
, struct kvm_memory_slot
*new,
434 u64 last_generation
);
436 static inline struct kvm_memslots
*kvm_memslots(struct kvm
*kvm
)
438 return rcu_dereference_check(kvm
->memslots
,
439 srcu_read_lock_held(&kvm
->srcu
)
440 || lockdep_is_held(&kvm
->slots_lock
));
443 static inline struct kvm_memory_slot
*
444 id_to_memslot(struct kvm_memslots
*slots
, int id
)
446 int index
= slots
->id_to_index
[id
];
447 struct kvm_memory_slot
*slot
;
449 slot
= &slots
->memslots
[index
];
451 WARN_ON(slot
->id
!= id
);
455 int kvm_set_memory_region(struct kvm
*kvm
,
456 struct kvm_userspace_memory_region
*mem
,
458 int __kvm_set_memory_region(struct kvm
*kvm
,
459 struct kvm_userspace_memory_region
*mem
,
461 void kvm_arch_free_memslot(struct kvm_memory_slot
*free
,
462 struct kvm_memory_slot
*dont
);
463 int kvm_arch_create_memslot(struct kvm_memory_slot
*slot
, unsigned long npages
);
464 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
465 struct kvm_memory_slot
*memslot
,
466 struct kvm_memory_slot old
,
467 struct kvm_userspace_memory_region
*mem
,
469 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
470 struct kvm_userspace_memory_region
*mem
,
471 struct kvm_memory_slot old
,
473 bool kvm_largepages_enabled(void);
474 void kvm_disable_largepages(void);
475 /* flush all memory translations */
476 void kvm_arch_flush_shadow_all(struct kvm
*kvm
);
477 /* flush memory translations pointing to 'slot' */
478 void kvm_arch_flush_shadow_memslot(struct kvm
*kvm
,
479 struct kvm_memory_slot
*slot
);
481 int gfn_to_page_many_atomic(struct kvm
*kvm
, gfn_t gfn
, struct page
**pages
,
484 struct page
*gfn_to_page(struct kvm
*kvm
, gfn_t gfn
);
485 unsigned long gfn_to_hva(struct kvm
*kvm
, gfn_t gfn
);
486 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
487 void kvm_release_page_clean(struct page
*page
);
488 void kvm_release_page_dirty(struct page
*page
);
489 void kvm_set_page_dirty(struct page
*page
);
490 void kvm_set_page_accessed(struct page
*page
);
492 pfn_t
gfn_to_pfn_atomic(struct kvm
*kvm
, gfn_t gfn
);
493 pfn_t
gfn_to_pfn_async(struct kvm
*kvm
, gfn_t gfn
, bool *async
,
494 bool write_fault
, bool *writable
);
495 pfn_t
gfn_to_pfn(struct kvm
*kvm
, gfn_t gfn
);
496 pfn_t
gfn_to_pfn_prot(struct kvm
*kvm
, gfn_t gfn
, bool write_fault
,
498 pfn_t
gfn_to_pfn_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
);
499 pfn_t
gfn_to_pfn_memslot_atomic(struct kvm_memory_slot
*slot
, gfn_t gfn
);
501 void kvm_release_pfn_dirty(pfn_t pfn
);
502 void kvm_release_pfn_clean(pfn_t pfn
);
503 void kvm_set_pfn_dirty(pfn_t pfn
);
504 void kvm_set_pfn_accessed(pfn_t pfn
);
505 void kvm_get_pfn(pfn_t pfn
);
507 int kvm_read_guest_page(struct kvm
*kvm
, gfn_t gfn
, void *data
, int offset
,
509 int kvm_read_guest_atomic(struct kvm
*kvm
, gpa_t gpa
, void *data
,
511 int kvm_read_guest(struct kvm
*kvm
, gpa_t gpa
, void *data
, unsigned long len
);
512 int kvm_read_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
513 void *data
, unsigned long len
);
514 int kvm_write_guest_page(struct kvm
*kvm
, gfn_t gfn
, const void *data
,
515 int offset
, int len
);
516 int kvm_write_guest(struct kvm
*kvm
, gpa_t gpa
, const void *data
,
518 int kvm_write_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
519 void *data
, unsigned long len
);
520 int kvm_gfn_to_hva_cache_init(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
521 gpa_t gpa
, unsigned long len
);
522 int kvm_clear_guest_page(struct kvm
*kvm
, gfn_t gfn
, int offset
, int len
);
523 int kvm_clear_guest(struct kvm
*kvm
, gpa_t gpa
, unsigned long len
);
524 struct kvm_memory_slot
*gfn_to_memslot(struct kvm
*kvm
, gfn_t gfn
);
525 int kvm_is_visible_gfn(struct kvm
*kvm
, gfn_t gfn
);
526 unsigned long kvm_host_page_size(struct kvm
*kvm
, gfn_t gfn
);
527 void mark_page_dirty(struct kvm
*kvm
, gfn_t gfn
);
528 void mark_page_dirty_in_slot(struct kvm
*kvm
, struct kvm_memory_slot
*memslot
,
531 void kvm_vcpu_block(struct kvm_vcpu
*vcpu
);
532 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
533 bool kvm_vcpu_yield_to(struct kvm_vcpu
*target
);
534 void kvm_vcpu_on_spin(struct kvm_vcpu
*vcpu
);
535 void kvm_resched(struct kvm_vcpu
*vcpu
);
536 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
);
537 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
);
539 void kvm_flush_remote_tlbs(struct kvm
*kvm
);
540 void kvm_reload_remote_mmus(struct kvm
*kvm
);
541 void kvm_make_mclock_inprogress_request(struct kvm
*kvm
);
542 void kvm_make_update_eoibitmap_request(struct kvm
*kvm
);
544 long kvm_arch_dev_ioctl(struct file
*filp
,
545 unsigned int ioctl
, unsigned long arg
);
546 long kvm_arch_vcpu_ioctl(struct file
*filp
,
547 unsigned int ioctl
, unsigned long arg
);
548 int kvm_arch_vcpu_fault(struct kvm_vcpu
*vcpu
, struct vm_fault
*vmf
);
550 int kvm_dev_ioctl_check_extension(long ext
);
552 int kvm_get_dirty_log(struct kvm
*kvm
,
553 struct kvm_dirty_log
*log
, int *is_dirty
);
554 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
555 struct kvm_dirty_log
*log
);
557 int kvm_vm_ioctl_set_memory_region(struct kvm
*kvm
,
559 kvm_userspace_memory_region
*mem
,
561 int kvm_vm_ioctl_irq_line(struct kvm
*kvm
, struct kvm_irq_level
*irq_level
);
562 long kvm_arch_vm_ioctl(struct file
*filp
,
563 unsigned int ioctl
, unsigned long arg
);
565 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
566 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
568 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
569 struct kvm_translation
*tr
);
571 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
572 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
573 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
574 struct kvm_sregs
*sregs
);
575 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
576 struct kvm_sregs
*sregs
);
577 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
578 struct kvm_mp_state
*mp_state
);
579 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
580 struct kvm_mp_state
*mp_state
);
581 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
582 struct kvm_guest_debug
*dbg
);
583 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
);
585 int kvm_arch_init(void *opaque
);
586 void kvm_arch_exit(void);
588 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
);
589 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
);
591 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
);
592 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
);
593 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
);
594 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
, unsigned int id
);
595 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
);
596 int kvm_arch_vcpu_postcreate(struct kvm_vcpu
*vcpu
);
597 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
);
599 int kvm_arch_hardware_enable(void *garbage
);
600 void kvm_arch_hardware_disable(void *garbage
);
601 int kvm_arch_hardware_setup(void);
602 void kvm_arch_hardware_unsetup(void);
603 void kvm_arch_check_processor_compat(void *rtn
);
604 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
);
605 int kvm_arch_vcpu_should_kick(struct kvm_vcpu
*vcpu
);
607 void kvm_free_physmem(struct kvm
*kvm
);
609 void *kvm_kvzalloc(unsigned long size
);
610 void kvm_kvfree(const void *addr
);
612 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
613 static inline struct kvm
*kvm_arch_alloc_vm(void)
615 return kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
618 static inline void kvm_arch_free_vm(struct kvm
*kvm
)
624 static inline wait_queue_head_t
*kvm_arch_vcpu_wq(struct kvm_vcpu
*vcpu
)
626 #ifdef __KVM_HAVE_ARCH_WQP
627 return vcpu
->arch
.wqp
;
633 int kvm_arch_init_vm(struct kvm
*kvm
, unsigned long type
);
634 void kvm_arch_destroy_vm(struct kvm
*kvm
);
635 void kvm_free_all_assigned_devices(struct kvm
*kvm
);
636 void kvm_arch_sync_events(struct kvm
*kvm
);
638 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
);
639 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
641 bool kvm_is_mmio_pfn(pfn_t pfn
);
643 struct kvm_irq_ack_notifier
{
644 struct hlist_node link
;
646 void (*irq_acked
)(struct kvm_irq_ack_notifier
*kian
);
649 struct kvm_assigned_dev_kernel
{
650 struct kvm_irq_ack_notifier ack_notifier
;
651 struct list_head list
;
656 unsigned int entries_nr
;
658 bool host_irq_disabled
;
660 struct msix_entry
*host_msix_entries
;
662 struct msix_entry
*guest_msix_entries
;
663 unsigned long irq_requested_type
;
668 spinlock_t intx_lock
;
669 spinlock_t intx_mask_lock
;
671 struct pci_saved_state
*pci_saved_state
;
674 struct kvm_irq_mask_notifier
{
675 void (*func
)(struct kvm_irq_mask_notifier
*kimn
, bool masked
);
677 struct hlist_node link
;
680 void kvm_register_irq_mask_notifier(struct kvm
*kvm
, int irq
,
681 struct kvm_irq_mask_notifier
*kimn
);
682 void kvm_unregister_irq_mask_notifier(struct kvm
*kvm
, int irq
,
683 struct kvm_irq_mask_notifier
*kimn
);
684 void kvm_fire_mask_notifiers(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
,
687 #ifdef __KVM_HAVE_IOAPIC
688 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic
*ioapic
,
689 union kvm_ioapic_redirect_entry
*entry
,
690 unsigned long *deliver_bitmask
);
692 int kvm_set_irq(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
);
693 int kvm_set_irq_inatomic(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
);
694 int kvm_set_msi(struct kvm_kernel_irq_routing_entry
*irq_entry
, struct kvm
*kvm
,
695 int irq_source_id
, int level
);
696 bool kvm_irq_has_notifier(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
697 void kvm_notify_acked_irq(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
698 void kvm_register_irq_ack_notifier(struct kvm
*kvm
,
699 struct kvm_irq_ack_notifier
*kian
);
700 void kvm_unregister_irq_ack_notifier(struct kvm
*kvm
,
701 struct kvm_irq_ack_notifier
*kian
);
702 int kvm_request_irq_source_id(struct kvm
*kvm
);
703 void kvm_free_irq_source_id(struct kvm
*kvm
, int irq_source_id
);
705 /* For vcpu->arch.iommu_flags */
706 #define KVM_IOMMU_CACHE_COHERENCY 0x1
708 #ifdef CONFIG_IOMMU_API
709 int kvm_iommu_map_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
710 void kvm_iommu_unmap_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
711 int kvm_iommu_map_guest(struct kvm
*kvm
);
712 int kvm_iommu_unmap_guest(struct kvm
*kvm
);
713 int kvm_assign_device(struct kvm
*kvm
,
714 struct kvm_assigned_dev_kernel
*assigned_dev
);
715 int kvm_deassign_device(struct kvm
*kvm
,
716 struct kvm_assigned_dev_kernel
*assigned_dev
);
717 #else /* CONFIG_IOMMU_API */
718 static inline int kvm_iommu_map_pages(struct kvm
*kvm
,
719 struct kvm_memory_slot
*slot
)
724 static inline void kvm_iommu_unmap_pages(struct kvm
*kvm
,
725 struct kvm_memory_slot
*slot
)
729 static inline int kvm_iommu_map_guest(struct kvm
*kvm
)
734 static inline int kvm_iommu_unmap_guest(struct kvm
*kvm
)
739 static inline int kvm_assign_device(struct kvm
*kvm
,
740 struct kvm_assigned_dev_kernel
*assigned_dev
)
745 static inline int kvm_deassign_device(struct kvm
*kvm
,
746 struct kvm_assigned_dev_kernel
*assigned_dev
)
750 #endif /* CONFIG_IOMMU_API */
752 static inline void __guest_enter(void)
755 * This is running in ioctl context so we can avoid
756 * the call to vtime_account() with its unnecessary idle check.
758 vtime_account_system(current
);
759 current
->flags
|= PF_VCPU
;
762 static inline void __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(current
);
769 current
->flags
&= ~PF_VCPU
;
772 #ifdef CONFIG_CONTEXT_TRACKING
773 extern void guest_enter(void);
774 extern void guest_exit(void);
776 #else /* !CONFIG_CONTEXT_TRACKING */
777 static inline void guest_enter(void)
782 static inline void guest_exit(void)
786 #endif /* !CONFIG_CONTEXT_TRACKING */
788 static inline void kvm_guest_enter(void)
792 BUG_ON(preemptible());
794 local_irq_save(flags
);
796 local_irq_restore(flags
);
798 /* KVM does not hold any references to rcu protected data when it
799 * switches CPU into a guest mode. In fact switching to a guest mode
800 * is very similar to exiting to userspase from rcu point of view. In
801 * addition CPU may stay in a guest mode for quite a long time (up to
802 * one time slice). Lets treat guest mode as quiescent state, just like
803 * we do with user-mode execution.
805 rcu_virt_note_context_switch(smp_processor_id());
808 static inline void kvm_guest_exit(void)
812 local_irq_save(flags
);
814 local_irq_restore(flags
);
818 * search_memslots() and __gfn_to_memslot() are here because they are
819 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
820 * gfn_to_memslot() itself isn't here as an inline because that would
821 * bloat other code too much.
823 static inline struct kvm_memory_slot
*
824 search_memslots(struct kvm_memslots
*slots
, gfn_t gfn
)
826 struct kvm_memory_slot
*memslot
;
828 kvm_for_each_memslot(memslot
, slots
)
829 if (gfn
>= memslot
->base_gfn
&&
830 gfn
< memslot
->base_gfn
+ memslot
->npages
)
836 static inline struct kvm_memory_slot
*
837 __gfn_to_memslot(struct kvm_memslots
*slots
, gfn_t gfn
)
839 return search_memslots(slots
, gfn
);
842 static inline unsigned long
843 __gfn_to_hva_memslot(struct kvm_memory_slot
*slot
, gfn_t gfn
)
845 return slot
->userspace_addr
+ (gfn
- slot
->base_gfn
) * PAGE_SIZE
;
848 static inline int memslot_id(struct kvm
*kvm
, gfn_t gfn
)
850 return gfn_to_memslot(kvm
, gfn
)->id
;
853 static inline gfn_t
gfn_to_index(gfn_t gfn
, gfn_t base_gfn
, int level
)
855 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
856 return (gfn
>> KVM_HPAGE_GFN_SHIFT(level
)) -
857 (base_gfn
>> KVM_HPAGE_GFN_SHIFT(level
));
861 hva_to_gfn_memslot(unsigned long hva
, struct kvm_memory_slot
*slot
)
863 gfn_t gfn_offset
= (hva
- slot
->userspace_addr
) >> PAGE_SHIFT
;
865 return slot
->base_gfn
+ gfn_offset
;
868 static inline gpa_t
gfn_to_gpa(gfn_t gfn
)
870 return (gpa_t
)gfn
<< PAGE_SHIFT
;
873 static inline gfn_t
gpa_to_gfn(gpa_t gpa
)
875 return (gfn_t
)(gpa
>> PAGE_SHIFT
);
878 static inline hpa_t
pfn_to_hpa(pfn_t pfn
)
880 return (hpa_t
)pfn
<< PAGE_SHIFT
;
883 static inline void kvm_migrate_timers(struct kvm_vcpu
*vcpu
)
885 set_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
);
893 struct kvm_stats_debugfs_item
{
896 enum kvm_stat_kind kind
;
897 struct dentry
*dentry
;
899 extern struct kvm_stats_debugfs_item debugfs_entries
[];
900 extern struct dentry
*kvm_debugfs_dir
;
902 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
903 static inline int mmu_notifier_retry(struct kvm
*kvm
, unsigned long mmu_seq
)
905 if (unlikely(kvm
->mmu_notifier_count
))
908 * Ensure the read of mmu_notifier_count happens before the read
909 * of mmu_notifier_seq. This interacts with the smp_wmb() in
910 * mmu_notifier_invalidate_range_end to make sure that the caller
911 * either sees the old (non-zero) value of mmu_notifier_count or
912 * the new (incremented) value of mmu_notifier_seq.
913 * PowerPC Book3s HV KVM calls this under a per-page lock
914 * rather than under kvm->mmu_lock, for scalability, so
915 * can't rely on kvm->mmu_lock to keep things ordered.
918 if (kvm
->mmu_notifier_seq
!= mmu_seq
)
924 #ifdef KVM_CAP_IRQ_ROUTING
926 #define KVM_MAX_IRQ_ROUTES 1024
928 int kvm_setup_default_irq_routing(struct kvm
*kvm
);
929 int kvm_set_irq_routing(struct kvm
*kvm
,
930 const struct kvm_irq_routing_entry
*entries
,
933 void kvm_free_irq_routing(struct kvm
*kvm
);
935 int kvm_send_userspace_msi(struct kvm
*kvm
, struct kvm_msi
*msi
);
939 static inline void kvm_free_irq_routing(struct kvm
*kvm
) {}
943 #ifdef CONFIG_HAVE_KVM_EVENTFD
945 void kvm_eventfd_init(struct kvm
*kvm
);
946 int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
);
948 #ifdef CONFIG_HAVE_KVM_IRQCHIP
949 int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
);
950 void kvm_irqfd_release(struct kvm
*kvm
);
951 void kvm_irq_routing_update(struct kvm
*, struct kvm_irq_routing_table
*);
953 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
958 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
963 static inline void kvm_eventfd_init(struct kvm
*kvm
) {}
965 static inline int kvm_irqfd(struct kvm
*kvm
, struct kvm_irqfd
*args
)
970 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
972 #ifdef CONFIG_HAVE_KVM_IRQCHIP
973 static inline void kvm_irq_routing_update(struct kvm
*kvm
,
974 struct kvm_irq_routing_table
*irq_rt
)
976 rcu_assign_pointer(kvm
->irq_routing
, irq_rt
);
980 static inline int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
)
985 #endif /* CONFIG_HAVE_KVM_EVENTFD */
987 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
988 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu
*vcpu
)
990 return vcpu
->kvm
->bsp_vcpu_id
== vcpu
->vcpu_id
;
993 bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
);
997 static inline bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
) { return true; }
1001 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
1003 long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
1008 static inline long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
1016 static inline void kvm_make_request(int req
, struct kvm_vcpu
*vcpu
)
1018 set_bit(req
, &vcpu
->requests
);
1021 static inline bool kvm_check_request(int req
, struct kvm_vcpu
*vcpu
)
1023 if (test_bit(req
, &vcpu
->requests
)) {
1024 clear_bit(req
, &vcpu
->requests
);
1031 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1033 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
1035 vcpu
->spin_loop
.in_spin_loop
= val
;
1037 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
1039 vcpu
->spin_loop
.dy_eligible
= val
;
1042 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1044 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu
*vcpu
, bool val
)
1048 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu
*vcpu
, bool val
)
1052 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu
*vcpu
)
1057 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */