5 * This work is licensed under the terms of the GNU GPL, version 2. See
6 * the COPYING file in the top-level directory.
9 #include <linux/types.h>
10 #include <linux/hardirq.h>
11 #include <linux/list.h>
12 #include <linux/mutex.h>
13 #include <linux/spinlock.h>
14 #include <linux/signal.h>
15 #include <linux/sched.h>
16 #include <linux/bug.h>
18 #include <linux/mmu_notifier.h>
19 #include <linux/preempt.h>
20 #include <linux/msi.h>
21 #include <linux/slab.h>
22 #include <linux/rcupdate.h>
23 #include <linux/ratelimit.h>
24 #include <asm/signal.h>
26 #include <linux/kvm.h>
27 #include <linux/kvm_para.h>
29 #include <linux/kvm_types.h>
31 #include <asm/kvm_host.h>
34 #define KVM_MMIO_SIZE 8
38 * vcpu->requests bit members
40 #define KVM_REQ_TLB_FLUSH 0
41 #define KVM_REQ_MIGRATE_TIMER 1
42 #define KVM_REQ_REPORT_TPR_ACCESS 2
43 #define KVM_REQ_MMU_RELOAD 3
44 #define KVM_REQ_TRIPLE_FAULT 4
45 #define KVM_REQ_PENDING_TIMER 5
46 #define KVM_REQ_UNHALT 6
47 #define KVM_REQ_MMU_SYNC 7
48 #define KVM_REQ_CLOCK_UPDATE 8
49 #define KVM_REQ_KICK 9
50 #define KVM_REQ_DEACTIVATE_FPU 10
51 #define KVM_REQ_EVENT 11
52 #define KVM_REQ_APF_HALT 12
53 #define KVM_REQ_STEAL_UPDATE 13
54 #define KVM_REQ_NMI 14
55 #define KVM_REQ_IMMEDIATE_EXIT 15
56 #define KVM_REQ_PMU 16
57 #define KVM_REQ_PMI 17
59 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
63 extern struct kmem_cache
*kvm_vcpu_cache
;
68 struct kvm_io_device
*dev
;
73 #define NR_IOBUS_DEVS 300
74 struct kvm_io_range range
[NR_IOBUS_DEVS
];
83 int kvm_io_bus_write(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
84 int len
, const void *val
);
85 int kvm_io_bus_read(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
, int len
,
87 int kvm_io_bus_register_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
88 int len
, struct kvm_io_device
*dev
);
89 int kvm_io_bus_unregister_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
,
90 struct kvm_io_device
*dev
);
92 #ifdef CONFIG_KVM_ASYNC_PF
94 struct work_struct work
;
95 struct list_head link
;
96 struct list_head queue
;
97 struct kvm_vcpu
*vcpu
;
101 struct kvm_arch_async_pf arch
;
106 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu
*vcpu
);
107 void kvm_check_async_pf_completion(struct kvm_vcpu
*vcpu
);
108 int kvm_setup_async_pf(struct kvm_vcpu
*vcpu
, gva_t gva
, gfn_t gfn
,
109 struct kvm_arch_async_pf
*arch
);
110 int kvm_async_pf_wakeup_all(struct kvm_vcpu
*vcpu
);
121 #ifdef CONFIG_PREEMPT_NOTIFIERS
122 struct preempt_notifier preempt_notifier
;
128 unsigned long requests
;
129 unsigned long guest_debug
;
135 int guest_fpu_loaded
, guest_xcr0_loaded
;
136 wait_queue_head_t wq
;
140 struct kvm_vcpu_stat stat
;
142 #ifdef CONFIG_HAS_IOMEM
144 int mmio_read_completed
;
148 unsigned char mmio_data
[KVM_MMIO_SIZE
];
149 gpa_t mmio_phys_addr
;
152 #ifdef CONFIG_KVM_ASYNC_PF
155 struct list_head queue
;
156 struct list_head done
;
161 struct kvm_vcpu_arch arch
;
164 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu
*vcpu
)
166 return cmpxchg(&vcpu
->mode
, IN_GUEST_MODE
, EXITING_GUEST_MODE
);
170 * Some of the bitops functions do not support too long bitmaps.
171 * This number must be determined not to exceed such limits.
173 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
175 struct kvm_memory_slot
{
177 unsigned long npages
;
180 unsigned long *dirty_bitmap
;
181 unsigned long *dirty_bitmap_head
;
182 unsigned long nr_dirty_pages
;
183 struct kvm_arch_memory_slot arch
;
184 unsigned long userspace_addr
;
189 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot
*memslot
)
191 return ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
194 struct kvm_kernel_irq_routing_entry
{
197 int (*set
)(struct kvm_kernel_irq_routing_entry
*e
,
198 struct kvm
*kvm
, int irq_source_id
, int level
);
206 struct hlist_node link
;
209 #ifdef __KVM_HAVE_IOAPIC
211 struct kvm_irq_routing_table
{
212 int chip
[KVM_NR_IRQCHIPS
][KVM_IOAPIC_NUM_PINS
];
213 struct kvm_kernel_irq_routing_entry
*rt_entries
;
216 * Array indexed by gsi. Each entry contains list of irq chips
217 * the gsi is connected to.
219 struct hlist_head map
[0];
224 struct kvm_irq_routing_table
{};
228 #ifndef KVM_MEM_SLOTS_NUM
229 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
234 * memslots are not sorted by id anymore, please use id_to_memslot()
235 * to get the memslot by its id.
237 struct kvm_memslots
{
239 struct kvm_memory_slot memslots
[KVM_MEM_SLOTS_NUM
];
240 /* The mapping table from slot id to the index in memslots[]. */
241 int id_to_index
[KVM_MEM_SLOTS_NUM
];
246 struct mutex slots_lock
;
247 struct mm_struct
*mm
; /* userspace tied to this vm */
248 struct kvm_memslots
*memslots
;
249 struct srcu_struct srcu
;
250 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
253 struct kvm_vcpu
*vcpus
[KVM_MAX_VCPUS
];
254 atomic_t online_vcpus
;
255 int last_boosted_vcpu
;
256 struct list_head vm_list
;
258 struct kvm_io_bus
*buses
[KVM_NR_BUSES
];
259 #ifdef CONFIG_HAVE_KVM_EVENTFD
262 struct list_head items
;
264 struct list_head ioeventfds
;
266 struct kvm_vm_stat stat
;
267 struct kvm_arch arch
;
268 atomic_t users_count
;
269 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
270 struct kvm_coalesced_mmio_ring
*coalesced_mmio_ring
;
271 spinlock_t ring_lock
;
272 struct list_head coalesced_zones
;
275 struct mutex irq_lock
;
276 #ifdef CONFIG_HAVE_KVM_IRQCHIP
278 * Update side is protected by irq_lock and,
279 * if configured, irqfds.lock.
281 struct kvm_irq_routing_table __rcu
*irq_routing
;
282 struct hlist_head mask_notifier_list
;
283 struct hlist_head irq_ack_notifier_list
;
286 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
287 struct mmu_notifier mmu_notifier
;
288 unsigned long mmu_notifier_seq
;
289 long mmu_notifier_count
;
294 /* The guest did something we don't support. */
295 #define pr_unimpl(vcpu, fmt, ...) \
296 pr_err_ratelimited("kvm: %i: cpu%i " fmt, \
297 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__)
299 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
300 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
302 static inline struct kvm_vcpu
*kvm_get_vcpu(struct kvm
*kvm
, int i
)
305 return kvm
->vcpus
[i
];
308 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
310 idx < atomic_read(&kvm->online_vcpus) && \
311 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
314 #define kvm_for_each_memslot(memslot, slots) \
315 for (memslot = &slots->memslots[0]; \
316 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
319 int kvm_vcpu_init(struct kvm_vcpu
*vcpu
, struct kvm
*kvm
, unsigned id
);
320 void kvm_vcpu_uninit(struct kvm_vcpu
*vcpu
);
322 void vcpu_load(struct kvm_vcpu
*vcpu
);
323 void vcpu_put(struct kvm_vcpu
*vcpu
);
325 int kvm_init(void *opaque
, unsigned vcpu_size
, unsigned vcpu_align
,
326 struct module
*module
);
329 void kvm_get_kvm(struct kvm
*kvm
);
330 void kvm_put_kvm(struct kvm
*kvm
);
331 void update_memslots(struct kvm_memslots
*slots
, struct kvm_memory_slot
*new);
333 static inline struct kvm_memslots
*kvm_memslots(struct kvm
*kvm
)
335 return rcu_dereference_check(kvm
->memslots
,
336 srcu_read_lock_held(&kvm
->srcu
)
337 || lockdep_is_held(&kvm
->slots_lock
));
340 static inline struct kvm_memory_slot
*
341 id_to_memslot(struct kvm_memslots
*slots
, int id
)
343 int index
= slots
->id_to_index
[id
];
344 struct kvm_memory_slot
*slot
;
346 slot
= &slots
->memslots
[index
];
348 WARN_ON(slot
->id
!= id
);
352 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
353 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
354 static inline int is_error_hpa(hpa_t hpa
) { return hpa
>> HPA_MSB
; }
356 extern struct page
*bad_page
;
357 extern struct page
*fault_page
;
359 extern pfn_t bad_pfn
;
360 extern pfn_t fault_pfn
;
362 int is_error_page(struct page
*page
);
363 int is_error_pfn(pfn_t pfn
);
364 int is_hwpoison_pfn(pfn_t pfn
);
365 int is_fault_pfn(pfn_t pfn
);
366 int is_noslot_pfn(pfn_t pfn
);
367 int is_invalid_pfn(pfn_t pfn
);
368 int kvm_is_error_hva(unsigned long addr
);
369 int kvm_set_memory_region(struct kvm
*kvm
,
370 struct kvm_userspace_memory_region
*mem
,
372 int __kvm_set_memory_region(struct kvm
*kvm
,
373 struct kvm_userspace_memory_region
*mem
,
375 void kvm_arch_free_memslot(struct kvm_memory_slot
*free
,
376 struct kvm_memory_slot
*dont
);
377 int kvm_arch_create_memslot(struct kvm_memory_slot
*slot
, unsigned long npages
);
378 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
379 struct kvm_memory_slot
*memslot
,
380 struct kvm_memory_slot old
,
381 struct kvm_userspace_memory_region
*mem
,
383 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
384 struct kvm_userspace_memory_region
*mem
,
385 struct kvm_memory_slot old
,
387 bool kvm_largepages_enabled(void);
388 void kvm_disable_largepages(void);
389 void kvm_arch_flush_shadow(struct kvm
*kvm
);
391 int gfn_to_page_many_atomic(struct kvm
*kvm
, gfn_t gfn
, struct page
**pages
,
394 struct page
*gfn_to_page(struct kvm
*kvm
, gfn_t gfn
);
395 unsigned long gfn_to_hva(struct kvm
*kvm
, gfn_t gfn
);
396 void kvm_release_page_clean(struct page
*page
);
397 void kvm_release_page_dirty(struct page
*page
);
398 void kvm_set_page_dirty(struct page
*page
);
399 void kvm_set_page_accessed(struct page
*page
);
401 pfn_t
hva_to_pfn_atomic(struct kvm
*kvm
, unsigned long addr
);
402 pfn_t
gfn_to_pfn_atomic(struct kvm
*kvm
, gfn_t gfn
);
403 pfn_t
gfn_to_pfn_async(struct kvm
*kvm
, gfn_t gfn
, bool *async
,
404 bool write_fault
, bool *writable
);
405 pfn_t
gfn_to_pfn(struct kvm
*kvm
, gfn_t gfn
);
406 pfn_t
gfn_to_pfn_prot(struct kvm
*kvm
, gfn_t gfn
, bool write_fault
,
408 pfn_t
gfn_to_pfn_memslot(struct kvm
*kvm
,
409 struct kvm_memory_slot
*slot
, gfn_t gfn
);
410 void kvm_release_pfn_dirty(pfn_t
);
411 void kvm_release_pfn_clean(pfn_t pfn
);
412 void kvm_set_pfn_dirty(pfn_t pfn
);
413 void kvm_set_pfn_accessed(pfn_t pfn
);
414 void kvm_get_pfn(pfn_t pfn
);
416 int kvm_read_guest_page(struct kvm
*kvm
, gfn_t gfn
, void *data
, int offset
,
418 int kvm_read_guest_atomic(struct kvm
*kvm
, gpa_t gpa
, void *data
,
420 int kvm_read_guest(struct kvm
*kvm
, gpa_t gpa
, void *data
, unsigned long len
);
421 int kvm_read_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
422 void *data
, unsigned long len
);
423 int kvm_write_guest_page(struct kvm
*kvm
, gfn_t gfn
, const void *data
,
424 int offset
, int len
);
425 int kvm_write_guest(struct kvm
*kvm
, gpa_t gpa
, const void *data
,
427 int kvm_write_guest_cached(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
428 void *data
, unsigned long len
);
429 int kvm_gfn_to_hva_cache_init(struct kvm
*kvm
, struct gfn_to_hva_cache
*ghc
,
431 int kvm_clear_guest_page(struct kvm
*kvm
, gfn_t gfn
, int offset
, int len
);
432 int kvm_clear_guest(struct kvm
*kvm
, gpa_t gpa
, unsigned long len
);
433 struct kvm_memory_slot
*gfn_to_memslot(struct kvm
*kvm
, gfn_t gfn
);
434 int kvm_is_visible_gfn(struct kvm
*kvm
, gfn_t gfn
);
435 unsigned long kvm_host_page_size(struct kvm
*kvm
, gfn_t gfn
);
436 void mark_page_dirty(struct kvm
*kvm
, gfn_t gfn
);
437 void mark_page_dirty_in_slot(struct kvm
*kvm
, struct kvm_memory_slot
*memslot
,
440 void kvm_vcpu_block(struct kvm_vcpu
*vcpu
);
441 void kvm_vcpu_on_spin(struct kvm_vcpu
*vcpu
);
442 void kvm_resched(struct kvm_vcpu
*vcpu
);
443 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
);
444 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
);
446 void kvm_flush_remote_tlbs(struct kvm
*kvm
);
447 void kvm_reload_remote_mmus(struct kvm
*kvm
);
449 long kvm_arch_dev_ioctl(struct file
*filp
,
450 unsigned int ioctl
, unsigned long arg
);
451 long kvm_arch_vcpu_ioctl(struct file
*filp
,
452 unsigned int ioctl
, unsigned long arg
);
453 int kvm_arch_vcpu_fault(struct kvm_vcpu
*vcpu
, struct vm_fault
*vmf
);
455 int kvm_dev_ioctl_check_extension(long ext
);
457 int kvm_get_dirty_log(struct kvm
*kvm
,
458 struct kvm_dirty_log
*log
, int *is_dirty
);
459 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
460 struct kvm_dirty_log
*log
);
462 int kvm_vm_ioctl_set_memory_region(struct kvm
*kvm
,
464 kvm_userspace_memory_region
*mem
,
466 long kvm_arch_vm_ioctl(struct file
*filp
,
467 unsigned int ioctl
, unsigned long arg
);
469 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
470 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
472 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
473 struct kvm_translation
*tr
);
475 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
476 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
477 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
478 struct kvm_sregs
*sregs
);
479 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
480 struct kvm_sregs
*sregs
);
481 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
482 struct kvm_mp_state
*mp_state
);
483 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
484 struct kvm_mp_state
*mp_state
);
485 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
486 struct kvm_guest_debug
*dbg
);
487 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
);
489 int kvm_arch_init(void *opaque
);
490 void kvm_arch_exit(void);
492 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
);
493 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
);
495 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
);
496 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
);
497 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
);
498 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
, unsigned int id
);
499 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
);
500 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
);
502 int kvm_arch_vcpu_reset(struct kvm_vcpu
*vcpu
);
503 int kvm_arch_hardware_enable(void *garbage
);
504 void kvm_arch_hardware_disable(void *garbage
);
505 int kvm_arch_hardware_setup(void);
506 void kvm_arch_hardware_unsetup(void);
507 void kvm_arch_check_processor_compat(void *rtn
);
508 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
);
510 void kvm_free_physmem(struct kvm
*kvm
);
512 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
513 static inline struct kvm
*kvm_arch_alloc_vm(void)
515 return kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
518 static inline void kvm_arch_free_vm(struct kvm
*kvm
)
524 int kvm_arch_init_vm(struct kvm
*kvm
, unsigned long type
);
525 void kvm_arch_destroy_vm(struct kvm
*kvm
);
526 void kvm_free_all_assigned_devices(struct kvm
*kvm
);
527 void kvm_arch_sync_events(struct kvm
*kvm
);
529 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
);
530 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
532 int kvm_is_mmio_pfn(pfn_t pfn
);
534 struct kvm_irq_ack_notifier
{
535 struct hlist_node link
;
537 void (*irq_acked
)(struct kvm_irq_ack_notifier
*kian
);
540 struct kvm_assigned_dev_kernel
{
541 struct kvm_irq_ack_notifier ack_notifier
;
542 struct list_head list
;
547 unsigned int entries_nr
;
549 bool host_irq_disabled
;
551 struct msix_entry
*host_msix_entries
;
553 struct msix_entry
*guest_msix_entries
;
554 unsigned long irq_requested_type
;
559 spinlock_t intx_lock
;
560 spinlock_t intx_mask_lock
;
562 struct pci_saved_state
*pci_saved_state
;
565 struct kvm_irq_mask_notifier
{
566 void (*func
)(struct kvm_irq_mask_notifier
*kimn
, bool masked
);
568 struct hlist_node link
;
571 void kvm_register_irq_mask_notifier(struct kvm
*kvm
, int irq
,
572 struct kvm_irq_mask_notifier
*kimn
);
573 void kvm_unregister_irq_mask_notifier(struct kvm
*kvm
, int irq
,
574 struct kvm_irq_mask_notifier
*kimn
);
575 void kvm_fire_mask_notifiers(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
,
578 #ifdef __KVM_HAVE_IOAPIC
579 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic
*ioapic
,
580 union kvm_ioapic_redirect_entry
*entry
,
581 unsigned long *deliver_bitmask
);
583 int kvm_set_irq(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
);
584 int kvm_set_msi(struct kvm_kernel_irq_routing_entry
*irq_entry
, struct kvm
*kvm
,
585 int irq_source_id
, int level
);
586 void kvm_notify_acked_irq(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
587 void kvm_register_irq_ack_notifier(struct kvm
*kvm
,
588 struct kvm_irq_ack_notifier
*kian
);
589 void kvm_unregister_irq_ack_notifier(struct kvm
*kvm
,
590 struct kvm_irq_ack_notifier
*kian
);
591 int kvm_request_irq_source_id(struct kvm
*kvm
);
592 void kvm_free_irq_source_id(struct kvm
*kvm
, int irq_source_id
);
594 /* For vcpu->arch.iommu_flags */
595 #define KVM_IOMMU_CACHE_COHERENCY 0x1
597 #ifdef CONFIG_IOMMU_API
598 int kvm_iommu_map_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
599 void kvm_iommu_unmap_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
600 int kvm_iommu_map_guest(struct kvm
*kvm
);
601 int kvm_iommu_unmap_guest(struct kvm
*kvm
);
602 int kvm_assign_device(struct kvm
*kvm
,
603 struct kvm_assigned_dev_kernel
*assigned_dev
);
604 int kvm_deassign_device(struct kvm
*kvm
,
605 struct kvm_assigned_dev_kernel
*assigned_dev
);
606 #else /* CONFIG_IOMMU_API */
607 static inline int kvm_iommu_map_pages(struct kvm
*kvm
,
608 struct kvm_memory_slot
*slot
)
613 static inline void kvm_iommu_unmap_pages(struct kvm
*kvm
,
614 struct kvm_memory_slot
*slot
)
618 static inline int kvm_iommu_map_guest(struct kvm
*kvm
)
623 static inline int kvm_iommu_unmap_guest(struct kvm
*kvm
)
628 static inline int kvm_assign_device(struct kvm
*kvm
,
629 struct kvm_assigned_dev_kernel
*assigned_dev
)
634 static inline int kvm_deassign_device(struct kvm
*kvm
,
635 struct kvm_assigned_dev_kernel
*assigned_dev
)
639 #endif /* CONFIG_IOMMU_API */
641 static inline void kvm_guest_enter(void)
643 BUG_ON(preemptible());
644 account_system_vtime(current
);
645 current
->flags
|= PF_VCPU
;
646 /* KVM does not hold any references to rcu protected data when it
647 * switches CPU into a guest mode. In fact switching to a guest mode
648 * is very similar to exiting to userspase from rcu point of view. In
649 * addition CPU may stay in a guest mode for quite a long time (up to
650 * one time slice). Lets treat guest mode as quiescent state, just like
651 * we do with user-mode execution.
653 rcu_virt_note_context_switch(smp_processor_id());
656 static inline void kvm_guest_exit(void)
658 account_system_vtime(current
);
659 current
->flags
&= ~PF_VCPU
;
663 * search_memslots() and __gfn_to_memslot() are here because they are
664 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
665 * gfn_to_memslot() itself isn't here as an inline because that would
666 * bloat other code too much.
668 static inline struct kvm_memory_slot
*
669 search_memslots(struct kvm_memslots
*slots
, gfn_t gfn
)
671 struct kvm_memory_slot
*memslot
;
673 kvm_for_each_memslot(memslot
, slots
)
674 if (gfn
>= memslot
->base_gfn
&&
675 gfn
< memslot
->base_gfn
+ memslot
->npages
)
681 static inline struct kvm_memory_slot
*
682 __gfn_to_memslot(struct kvm_memslots
*slots
, gfn_t gfn
)
684 return search_memslots(slots
, gfn
);
687 static inline int memslot_id(struct kvm
*kvm
, gfn_t gfn
)
689 return gfn_to_memslot(kvm
, gfn
)->id
;
692 static inline gfn_t
gfn_to_index(gfn_t gfn
, gfn_t base_gfn
, int level
)
694 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
695 return (gfn
>> KVM_HPAGE_GFN_SHIFT(level
)) -
696 (base_gfn
>> KVM_HPAGE_GFN_SHIFT(level
));
699 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot
*slot
,
702 return slot
->userspace_addr
+ (gfn
- slot
->base_gfn
) * PAGE_SIZE
;
705 static inline gpa_t
gfn_to_gpa(gfn_t gfn
)
707 return (gpa_t
)gfn
<< PAGE_SHIFT
;
710 static inline gfn_t
gpa_to_gfn(gpa_t gpa
)
712 return (gfn_t
)(gpa
>> PAGE_SHIFT
);
715 static inline hpa_t
pfn_to_hpa(pfn_t pfn
)
717 return (hpa_t
)pfn
<< PAGE_SHIFT
;
720 static inline void kvm_migrate_timers(struct kvm_vcpu
*vcpu
)
722 set_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
);
730 struct kvm_stats_debugfs_item
{
733 enum kvm_stat_kind kind
;
734 struct dentry
*dentry
;
736 extern struct kvm_stats_debugfs_item debugfs_entries
[];
737 extern struct dentry
*kvm_debugfs_dir
;
739 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
740 static inline int mmu_notifier_retry(struct kvm_vcpu
*vcpu
, unsigned long mmu_seq
)
742 if (unlikely(vcpu
->kvm
->mmu_notifier_count
))
745 * Ensure the read of mmu_notifier_count happens before the read
746 * of mmu_notifier_seq. This interacts with the smp_wmb() in
747 * mmu_notifier_invalidate_range_end to make sure that the caller
748 * either sees the old (non-zero) value of mmu_notifier_count or
749 * the new (incremented) value of mmu_notifier_seq.
750 * PowerPC Book3s HV KVM calls this under a per-page lock
751 * rather than under kvm->mmu_lock, for scalability, so
752 * can't rely on kvm->mmu_lock to keep things ordered.
755 if (vcpu
->kvm
->mmu_notifier_seq
!= mmu_seq
)
761 #ifdef CONFIG_HAVE_KVM_IRQCHIP
763 #define KVM_MAX_IRQ_ROUTES 1024
765 int kvm_setup_default_irq_routing(struct kvm
*kvm
);
766 int kvm_set_irq_routing(struct kvm
*kvm
,
767 const struct kvm_irq_routing_entry
*entries
,
770 void kvm_free_irq_routing(struct kvm
*kvm
);
774 static inline void kvm_free_irq_routing(struct kvm
*kvm
) {}
778 #ifdef CONFIG_HAVE_KVM_EVENTFD
780 void kvm_eventfd_init(struct kvm
*kvm
);
781 int kvm_irqfd(struct kvm
*kvm
, int fd
, int gsi
, int flags
);
782 void kvm_irqfd_release(struct kvm
*kvm
);
783 void kvm_irq_routing_update(struct kvm
*, struct kvm_irq_routing_table
*);
784 int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
);
788 static inline void kvm_eventfd_init(struct kvm
*kvm
) {}
790 static inline int kvm_irqfd(struct kvm
*kvm
, int fd
, int gsi
, int flags
)
795 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
797 #ifdef CONFIG_HAVE_KVM_IRQCHIP
798 static inline void kvm_irq_routing_update(struct kvm
*kvm
,
799 struct kvm_irq_routing_table
*irq_rt
)
801 rcu_assign_pointer(kvm
->irq_routing
, irq_rt
);
805 static inline int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
)
810 #endif /* CONFIG_HAVE_KVM_EVENTFD */
812 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
813 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu
*vcpu
)
815 return vcpu
->kvm
->bsp_vcpu_id
== vcpu
->vcpu_id
;
818 bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
);
822 static inline bool kvm_vcpu_compatible(struct kvm_vcpu
*vcpu
) { return true; }
826 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
828 long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
833 static inline long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
841 static inline void kvm_make_request(int req
, struct kvm_vcpu
*vcpu
)
843 set_bit(req
, &vcpu
->requests
);
846 static inline bool kvm_check_request(int req
, struct kvm_vcpu
*vcpu
)
848 if (test_bit(req
, &vcpu
->requests
)) {
849 clear_bit(req
, &vcpu
->requests
);