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>
17 #include <linux/mmu_notifier.h>
18 #include <linux/preempt.h>
19 #include <linux/msi.h>
20 #include <linux/slab.h>
21 #include <linux/rcupdate.h>
22 #include <linux/ratelimit.h>
23 #include <asm/signal.h>
25 #include <linux/kvm.h>
26 #include <linux/kvm_para.h>
28 #include <linux/kvm_types.h>
30 #include <asm/kvm_host.h>
33 #define KVM_MMIO_SIZE 8
37 * vcpu->requests bit members
39 #define KVM_REQ_TLB_FLUSH 0
40 #define KVM_REQ_MIGRATE_TIMER 1
41 #define KVM_REQ_REPORT_TPR_ACCESS 2
42 #define KVM_REQ_MMU_RELOAD 3
43 #define KVM_REQ_TRIPLE_FAULT 4
44 #define KVM_REQ_PENDING_TIMER 5
45 #define KVM_REQ_UNHALT 6
46 #define KVM_REQ_MMU_SYNC 7
47 #define KVM_REQ_CLOCK_UPDATE 8
48 #define KVM_REQ_KICK 9
49 #define KVM_REQ_DEACTIVATE_FPU 10
50 #define KVM_REQ_EVENT 11
51 #define KVM_REQ_APF_HALT 12
52 #define KVM_REQ_STEAL_UPDATE 13
53 #define KVM_REQ_NMI 14
54 #define KVM_REQ_IMMEDIATE_EXIT 15
56 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
60 extern struct kmem_cache
*kvm_vcpu_cache
;
65 struct kvm_io_device
*dev
;
70 #define NR_IOBUS_DEVS 300
71 struct kvm_io_range range
[NR_IOBUS_DEVS
];
80 int kvm_io_bus_write(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
81 int len
, const void *val
);
82 int kvm_io_bus_read(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
, int len
,
84 int kvm_io_bus_register_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
85 int len
, struct kvm_io_device
*dev
);
86 int kvm_io_bus_unregister_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
,
87 struct kvm_io_device
*dev
);
89 #ifdef CONFIG_KVM_ASYNC_PF
91 struct work_struct work
;
92 struct list_head link
;
93 struct list_head queue
;
94 struct kvm_vcpu
*vcpu
;
98 struct kvm_arch_async_pf arch
;
103 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu
*vcpu
);
104 void kvm_check_async_pf_completion(struct kvm_vcpu
*vcpu
);
105 int kvm_setup_async_pf(struct kvm_vcpu
*vcpu
, gva_t gva
, gfn_t gfn
,
106 struct kvm_arch_async_pf
*arch
);
107 int kvm_async_pf_wakeup_all(struct kvm_vcpu
*vcpu
);
118 #ifdef CONFIG_PREEMPT_NOTIFIERS
119 struct preempt_notifier preempt_notifier
;
125 unsigned long requests
;
126 unsigned long guest_debug
;
132 int guest_fpu_loaded
, guest_xcr0_loaded
;
133 wait_queue_head_t wq
;
137 struct kvm_vcpu_stat stat
;
139 #ifdef CONFIG_HAS_IOMEM
141 int mmio_read_completed
;
145 unsigned char mmio_data
[KVM_MMIO_SIZE
];
146 gpa_t mmio_phys_addr
;
149 #ifdef CONFIG_KVM_ASYNC_PF
152 struct list_head queue
;
153 struct list_head done
;
158 struct kvm_vcpu_arch arch
;
161 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu
*vcpu
)
163 return cmpxchg(&vcpu
->mode
, IN_GUEST_MODE
, EXITING_GUEST_MODE
);
167 * Some of the bitops functions do not support too long bitmaps.
168 * This number must be determined not to exceed such limits.
170 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
172 struct kvm_lpage_info
{
173 unsigned long rmap_pde
;
177 struct kvm_memory_slot
{
179 unsigned long npages
;
182 unsigned long *dirty_bitmap
;
183 unsigned long *dirty_bitmap_head
;
184 unsigned long nr_dirty_pages
;
185 struct kvm_lpage_info
*lpage_info
[KVM_NR_PAGE_SIZES
- 1];
186 unsigned long userspace_addr
;
191 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot
*memslot
)
193 return ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
196 struct kvm_kernel_irq_routing_entry
{
199 int (*set
)(struct kvm_kernel_irq_routing_entry
*e
,
200 struct kvm
*kvm
, int irq_source_id
, int level
);
208 struct hlist_node link
;
211 #ifdef __KVM_HAVE_IOAPIC
213 struct kvm_irq_routing_table
{
214 int chip
[KVM_NR_IRQCHIPS
][KVM_IOAPIC_NUM_PINS
];
215 struct kvm_kernel_irq_routing_entry
*rt_entries
;
218 * Array indexed by gsi. Each entry contains list of irq chips
219 * the gsi is connected to.
221 struct hlist_head map
[0];
226 struct kvm_irq_routing_table
{};
230 #ifndef KVM_MEM_SLOTS_NUM
231 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
234 struct kvm_memslots
{
237 struct kvm_memory_slot memslots
[KVM_MEM_SLOTS_NUM
];
242 struct mutex slots_lock
;
243 struct mm_struct
*mm
; /* userspace tied to this vm */
244 struct kvm_memslots
*memslots
;
245 struct srcu_struct srcu
;
246 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
248 struct kvm_vcpu
*bsp_vcpu
;
250 struct kvm_vcpu
*vcpus
[KVM_MAX_VCPUS
];
251 atomic_t online_vcpus
;
252 int last_boosted_vcpu
;
253 struct list_head vm_list
;
255 struct kvm_io_bus
*buses
[KVM_NR_BUSES
];
256 #ifdef CONFIG_HAVE_KVM_EVENTFD
259 struct list_head items
;
261 struct list_head ioeventfds
;
263 struct kvm_vm_stat stat
;
264 struct kvm_arch arch
;
265 atomic_t users_count
;
266 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
267 struct kvm_coalesced_mmio_ring
*coalesced_mmio_ring
;
268 spinlock_t ring_lock
;
269 struct list_head coalesced_zones
;
272 struct mutex irq_lock
;
273 #ifdef CONFIG_HAVE_KVM_IRQCHIP
275 * Update side is protected by irq_lock and,
276 * if configured, irqfds.lock.
278 struct kvm_irq_routing_table __rcu
*irq_routing
;
279 struct hlist_head mask_notifier_list
;
280 struct hlist_head irq_ack_notifier_list
;
283 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
284 struct mmu_notifier mmu_notifier
;
285 unsigned long mmu_notifier_seq
;
286 long mmu_notifier_count
;
291 /* The guest did something we don't support. */
292 #define pr_unimpl(vcpu, fmt, ...) \
293 pr_err_ratelimited("kvm: %i: cpu%i " fmt, \
294 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__)
296 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
297 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
299 static inline struct kvm_vcpu
*kvm_get_vcpu(struct kvm
*kvm
, int i
)
302 return kvm
->vcpus
[i
];
305 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
307 idx < atomic_read(&kvm->online_vcpus) && \
308 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
311 int kvm_vcpu_init(struct kvm_vcpu
*vcpu
, struct kvm
*kvm
, unsigned id
);
312 void kvm_vcpu_uninit(struct kvm_vcpu
*vcpu
);
314 void vcpu_load(struct kvm_vcpu
*vcpu
);
315 void vcpu_put(struct kvm_vcpu
*vcpu
);
317 int kvm_init(void *opaque
, unsigned vcpu_size
, unsigned vcpu_align
,
318 struct module
*module
);
321 void kvm_get_kvm(struct kvm
*kvm
);
322 void kvm_put_kvm(struct kvm
*kvm
);
323 void update_memslots(struct kvm_memslots
*slots
, struct kvm_memory_slot
*new);
325 static inline struct kvm_memslots
*kvm_memslots(struct kvm
*kvm
)
327 return rcu_dereference_check(kvm
->memslots
,
328 srcu_read_lock_held(&kvm
->srcu
)
329 || lockdep_is_held(&kvm
->slots_lock
));
332 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
333 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
334 static inline int is_error_hpa(hpa_t hpa
) { return hpa
>> HPA_MSB
; }
336 extern struct page
*bad_page
;
337 extern struct page
*fault_page
;
339 extern pfn_t bad_pfn
;
340 extern pfn_t fault_pfn
;
342 int is_error_page(struct page
*page
);
343 int is_error_pfn(pfn_t pfn
);
344 int is_hwpoison_pfn(pfn_t pfn
);
345 int is_fault_pfn(pfn_t pfn
);
346 int is_noslot_pfn(pfn_t pfn
);
347 int is_invalid_pfn(pfn_t pfn
);
348 int kvm_is_error_hva(unsigned long addr
);
349 int kvm_set_memory_region(struct kvm
*kvm
,
350 struct kvm_userspace_memory_region
*mem
,
352 int __kvm_set_memory_region(struct kvm
*kvm
,
353 struct kvm_userspace_memory_region
*mem
,
355 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
356 struct kvm_memory_slot
*memslot
,
357 struct kvm_memory_slot old
,
358 struct kvm_userspace_memory_region
*mem
,
360 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
361 struct kvm_userspace_memory_region
*mem
,
362 struct kvm_memory_slot old
,
364 void kvm_disable_largepages(void);
365 void kvm_arch_flush_shadow(struct kvm
*kvm
);
367 int gfn_to_page_many_atomic(struct kvm
*kvm
, gfn_t gfn
, struct page
**pages
,
370 struct page
*gfn_to_page(struct kvm
*kvm
, gfn_t gfn
);
371 unsigned long gfn_to_hva(struct kvm
*kvm
, gfn_t gfn
);
372 void kvm_release_page_clean(struct page
*page
);
373 void kvm_release_page_dirty(struct page
*page
);
374 void kvm_set_page_dirty(struct page
*page
);
375 void kvm_set_page_accessed(struct page
*page
);
377 pfn_t
hva_to_pfn_atomic(struct kvm
*kvm
, unsigned long addr
);
378 pfn_t
gfn_to_pfn_atomic(struct kvm
*kvm
, gfn_t gfn
);
379 pfn_t
gfn_to_pfn_async(struct kvm
*kvm
, gfn_t gfn
, bool *async
,
380 bool write_fault
, bool *writable
);
381 pfn_t
gfn_to_pfn(struct kvm
*kvm
, gfn_t gfn
);
382 pfn_t
gfn_to_pfn_prot(struct kvm
*kvm
, gfn_t gfn
, bool write_fault
,
384 pfn_t
gfn_to_pfn_memslot(struct kvm
*kvm
,
385 struct kvm_memory_slot
*slot
, gfn_t gfn
);
386 void kvm_release_pfn_dirty(pfn_t
);
387 void kvm_release_pfn_clean(pfn_t pfn
);
388 void kvm_set_pfn_dirty(pfn_t pfn
);
389 void kvm_set_pfn_accessed(pfn_t pfn
);
390 void kvm_get_pfn(pfn_t pfn
);
392 int kvm_read_guest_page(struct kvm
*kvm
, gfn_t gfn
, void *data
, int offset
,
394 int kvm_read_guest_atomic(struct kvm
*kvm
, gpa_t gpa
, void *data
,
396 int kvm_read_guest(struct kvm
*kvm
, gpa_t gpa
, void *data
, unsigned long len
);
397 int kvm_read_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
398 void *data
, unsigned long len
);
399 int kvm_write_guest_page(struct kvm
*kvm
, gfn_t gfn
, const void *data
,
400 int offset
, int len
);
401 int kvm_write_guest(struct kvm
*kvm
, gpa_t gpa
, const void *data
,
403 int kvm_write_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
404 void *data
, unsigned long len
);
405 int kvm_gfn_to_hva_cache_init(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
407 int kvm_clear_guest_page(struct kvm
*kvm
, gfn_t gfn
, int offset
, int len
);
408 int kvm_clear_guest(struct kvm
*kvm
, gpa_t gpa
, unsigned long len
);
409 struct kvm_memory_slot
*gfn_to_memslot(struct kvm
*kvm
, gfn_t gfn
);
410 int kvm_is_visible_gfn(struct kvm
*kvm
, gfn_t gfn
);
411 unsigned long kvm_host_page_size(struct kvm
*kvm
, gfn_t gfn
);
412 void mark_page_dirty(struct kvm
*kvm
, gfn_t gfn
);
413 void mark_page_dirty_in_slot(struct kvm
*kvm
, struct kvm_memory_slot
*memslot
,
416 void kvm_vcpu_block(struct kvm_vcpu
*vcpu
);
417 void kvm_vcpu_on_spin(struct kvm_vcpu
*vcpu
);
418 void kvm_resched(struct kvm_vcpu
*vcpu
);
419 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
);
420 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
);
422 void kvm_flush_remote_tlbs(struct kvm
*kvm
);
423 void kvm_reload_remote_mmus(struct kvm
*kvm
);
425 long kvm_arch_dev_ioctl(struct file
*filp
,
426 unsigned int ioctl
, unsigned long arg
);
427 long kvm_arch_vcpu_ioctl(struct file
*filp
,
428 unsigned int ioctl
, unsigned long arg
);
430 int kvm_dev_ioctl_check_extension(long ext
);
432 int kvm_get_dirty_log(struct kvm
*kvm
,
433 struct kvm_dirty_log
*log
, int *is_dirty
);
434 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
435 struct kvm_dirty_log
*log
);
437 int kvm_vm_ioctl_set_memory_region(struct kvm
*kvm
,
439 kvm_userspace_memory_region
*mem
,
441 long kvm_arch_vm_ioctl(struct file
*filp
,
442 unsigned int ioctl
, unsigned long arg
);
444 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
445 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
447 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
448 struct kvm_translation
*tr
);
450 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
451 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
452 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
453 struct kvm_sregs
*sregs
);
454 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
455 struct kvm_sregs
*sregs
);
456 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
457 struct kvm_mp_state
*mp_state
);
458 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
459 struct kvm_mp_state
*mp_state
);
460 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
461 struct kvm_guest_debug
*dbg
);
462 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
);
464 int kvm_arch_init(void *opaque
);
465 void kvm_arch_exit(void);
467 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
);
468 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
);
470 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
);
471 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
);
472 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
);
473 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
, unsigned int id
);
474 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
);
475 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
);
477 int kvm_arch_vcpu_reset(struct kvm_vcpu
*vcpu
);
478 int kvm_arch_hardware_enable(void *garbage
);
479 void kvm_arch_hardware_disable(void *garbage
);
480 int kvm_arch_hardware_setup(void);
481 void kvm_arch_hardware_unsetup(void);
482 void kvm_arch_check_processor_compat(void *rtn
);
483 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
);
485 void kvm_free_physmem(struct kvm
*kvm
);
487 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
488 static inline struct kvm
*kvm_arch_alloc_vm(void)
490 return kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
493 static inline void kvm_arch_free_vm(struct kvm
*kvm
)
499 int kvm_arch_init_vm(struct kvm
*kvm
);
500 void kvm_arch_destroy_vm(struct kvm
*kvm
);
501 void kvm_free_all_assigned_devices(struct kvm
*kvm
);
502 void kvm_arch_sync_events(struct kvm
*kvm
);
504 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
);
505 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
507 int kvm_is_mmio_pfn(pfn_t pfn
);
509 struct kvm_irq_ack_notifier
{
510 struct hlist_node link
;
512 void (*irq_acked
)(struct kvm_irq_ack_notifier
*kian
);
515 struct kvm_assigned_dev_kernel
{
516 struct kvm_irq_ack_notifier ack_notifier
;
517 struct list_head list
;
522 unsigned int entries_nr
;
524 bool host_irq_disabled
;
525 struct msix_entry
*host_msix_entries
;
527 struct msix_entry
*guest_msix_entries
;
528 unsigned long irq_requested_type
;
533 spinlock_t intx_lock
;
535 struct pci_saved_state
*pci_saved_state
;
538 struct kvm_irq_mask_notifier
{
539 void (*func
)(struct kvm_irq_mask_notifier
*kimn
, bool masked
);
541 struct hlist_node link
;
544 void kvm_register_irq_mask_notifier(struct kvm
*kvm
, int irq
,
545 struct kvm_irq_mask_notifier
*kimn
);
546 void kvm_unregister_irq_mask_notifier(struct kvm
*kvm
, int irq
,
547 struct kvm_irq_mask_notifier
*kimn
);
548 void kvm_fire_mask_notifiers(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
,
551 #ifdef __KVM_HAVE_IOAPIC
552 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic
*ioapic
,
553 union kvm_ioapic_redirect_entry
*entry
,
554 unsigned long *deliver_bitmask
);
556 int kvm_set_irq(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
);
557 int kvm_set_msi(struct kvm_kernel_irq_routing_entry
*irq_entry
, struct kvm
*kvm
,
558 int irq_source_id
, int level
);
559 void kvm_notify_acked_irq(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
560 void kvm_register_irq_ack_notifier(struct kvm
*kvm
,
561 struct kvm_irq_ack_notifier
*kian
);
562 void kvm_unregister_irq_ack_notifier(struct kvm
*kvm
,
563 struct kvm_irq_ack_notifier
*kian
);
564 int kvm_request_irq_source_id(struct kvm
*kvm
);
565 void kvm_free_irq_source_id(struct kvm
*kvm
, int irq_source_id
);
567 /* For vcpu->arch.iommu_flags */
568 #define KVM_IOMMU_CACHE_COHERENCY 0x1
570 #ifdef CONFIG_IOMMU_API
571 int kvm_iommu_map_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
572 int kvm_iommu_map_guest(struct kvm
*kvm
);
573 int kvm_iommu_unmap_guest(struct kvm
*kvm
);
574 int kvm_assign_device(struct kvm
*kvm
,
575 struct kvm_assigned_dev_kernel
*assigned_dev
);
576 int kvm_deassign_device(struct kvm
*kvm
,
577 struct kvm_assigned_dev_kernel
*assigned_dev
);
578 #else /* CONFIG_IOMMU_API */
579 static inline int kvm_iommu_map_pages(struct kvm
*kvm
,
580 struct kvm_memory_slot
*slot
)
585 static inline int kvm_iommu_map_guest(struct kvm
*kvm
)
590 static inline int kvm_iommu_unmap_guest(struct kvm
*kvm
)
595 static inline int kvm_assign_device(struct kvm
*kvm
,
596 struct kvm_assigned_dev_kernel
*assigned_dev
)
601 static inline int kvm_deassign_device(struct kvm
*kvm
,
602 struct kvm_assigned_dev_kernel
*assigned_dev
)
606 #endif /* CONFIG_IOMMU_API */
608 static inline void kvm_guest_enter(void)
610 BUG_ON(preemptible());
611 account_system_vtime(current
);
612 current
->flags
|= PF_VCPU
;
613 /* KVM does not hold any references to rcu protected data when it
614 * switches CPU into a guest mode. In fact switching to a guest mode
615 * is very similar to exiting to userspase from rcu point of view. In
616 * addition CPU may stay in a guest mode for quite a long time (up to
617 * one time slice). Lets treat guest mode as quiescent state, just like
618 * we do with user-mode execution.
620 rcu_virt_note_context_switch(smp_processor_id());
623 static inline void kvm_guest_exit(void)
625 account_system_vtime(current
);
626 current
->flags
&= ~PF_VCPU
;
629 static inline int memslot_id(struct kvm
*kvm
, gfn_t gfn
)
631 return gfn_to_memslot(kvm
, gfn
)->id
;
634 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot
*slot
,
637 return slot
->userspace_addr
+ (gfn
- slot
->base_gfn
) * PAGE_SIZE
;
640 static inline gpa_t
gfn_to_gpa(gfn_t gfn
)
642 return (gpa_t
)gfn
<< PAGE_SHIFT
;
645 static inline gfn_t
gpa_to_gfn(gpa_t gpa
)
647 return (gfn_t
)(gpa
>> PAGE_SHIFT
);
650 static inline hpa_t
pfn_to_hpa(pfn_t pfn
)
652 return (hpa_t
)pfn
<< PAGE_SHIFT
;
655 static inline void kvm_migrate_timers(struct kvm_vcpu
*vcpu
)
657 set_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
);
665 struct kvm_stats_debugfs_item
{
668 enum kvm_stat_kind kind
;
669 struct dentry
*dentry
;
671 extern struct kvm_stats_debugfs_item debugfs_entries
[];
672 extern struct dentry
*kvm_debugfs_dir
;
674 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
675 static inline int mmu_notifier_retry(struct kvm_vcpu
*vcpu
, unsigned long mmu_seq
)
677 if (unlikely(vcpu
->kvm
->mmu_notifier_count
))
680 * Both reads happen under the mmu_lock and both values are
681 * modified under mmu_lock, so there's no need of smb_rmb()
682 * here in between, otherwise mmu_notifier_count should be
683 * read before mmu_notifier_seq, see
684 * mmu_notifier_invalidate_range_end write side.
686 if (vcpu
->kvm
->mmu_notifier_seq
!= mmu_seq
)
692 #ifdef CONFIG_HAVE_KVM_IRQCHIP
694 #define KVM_MAX_IRQ_ROUTES 1024
696 int kvm_setup_default_irq_routing(struct kvm
*kvm
);
697 int kvm_set_irq_routing(struct kvm
*kvm
,
698 const struct kvm_irq_routing_entry
*entries
,
701 void kvm_free_irq_routing(struct kvm
*kvm
);
705 static inline void kvm_free_irq_routing(struct kvm
*kvm
) {}
709 #ifdef CONFIG_HAVE_KVM_EVENTFD
711 void kvm_eventfd_init(struct kvm
*kvm
);
712 int kvm_irqfd(struct kvm
*kvm
, int fd
, int gsi
, int flags
);
713 void kvm_irqfd_release(struct kvm
*kvm
);
714 void kvm_irq_routing_update(struct kvm
*, struct kvm_irq_routing_table
*);
715 int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
);
719 static inline void kvm_eventfd_init(struct kvm
*kvm
) {}
721 static inline int kvm_irqfd(struct kvm
*kvm
, int fd
, int gsi
, int flags
)
726 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
728 #ifdef CONFIG_HAVE_KVM_IRQCHIP
729 static inline void kvm_irq_routing_update(struct kvm
*kvm
,
730 struct kvm_irq_routing_table
*irq_rt
)
732 rcu_assign_pointer(kvm
->irq_routing
, irq_rt
);
736 static inline int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
)
741 #endif /* CONFIG_HAVE_KVM_EVENTFD */
743 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
744 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu
*vcpu
)
746 return vcpu
->kvm
->bsp_vcpu_id
== vcpu
->vcpu_id
;
750 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
752 long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
757 static inline long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
765 static inline void kvm_make_request(int req
, struct kvm_vcpu
*vcpu
)
767 set_bit(req
, &vcpu
->requests
);
770 static inline bool kvm_check_request(int req
, struct kvm_vcpu
*vcpu
)
772 if (test_bit(req
, &vcpu
->requests
)) {
773 clear_bit(req
, &vcpu
->requests
);