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/preempt.h>
18 #include <linux/marker.h>
19 #include <linux/msi.h>
20 #include <asm/signal.h>
22 #include <linux/kvm.h>
23 #include <linux/kvm_para.h>
25 #include <linux/kvm_types.h>
27 #include <asm/kvm_host.h>
30 * vcpu->requests bit members
32 #define KVM_REQ_TLB_FLUSH 0
33 #define KVM_REQ_MIGRATE_TIMER 1
34 #define KVM_REQ_REPORT_TPR_ACCESS 2
35 #define KVM_REQ_MMU_RELOAD 3
36 #define KVM_REQ_TRIPLE_FAULT 4
37 #define KVM_REQ_PENDING_TIMER 5
38 #define KVM_REQ_UNHALT 6
39 #define KVM_REQ_MMU_SYNC 7
40 #define KVM_REQ_KVMCLOCK_UPDATE 8
41 #define KVM_REQ_KICK 9
43 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
47 extern struct kmem_cache
*kvm_vcpu_cache
;
50 * It would be nice to use something smarter than a linear search, TBD...
51 * Thankfully we dont expect many devices to register (famous last words :),
52 * so until then it will suffice. At least its abstracted so we can change
57 #define NR_IOBUS_DEVS 6
58 struct kvm_io_device
*devs
[NR_IOBUS_DEVS
];
61 void kvm_io_bus_init(struct kvm_io_bus
*bus
);
62 void kvm_io_bus_destroy(struct kvm_io_bus
*bus
);
63 int kvm_io_bus_write(struct kvm_io_bus
*bus
, gpa_t addr
, int len
,
65 int kvm_io_bus_read(struct kvm_io_bus
*bus
, gpa_t addr
, int len
,
67 int __kvm_io_bus_register_dev(struct kvm_io_bus
*bus
,
68 struct kvm_io_device
*dev
);
69 int kvm_io_bus_register_dev(struct kvm
*kvm
, struct kvm_io_bus
*bus
,
70 struct kvm_io_device
*dev
);
71 void __kvm_io_bus_unregister_dev(struct kvm_io_bus
*bus
,
72 struct kvm_io_device
*dev
);
73 void kvm_io_bus_unregister_dev(struct kvm
*kvm
, struct kvm_io_bus
*bus
,
74 struct kvm_io_device
*dev
);
78 #ifdef CONFIG_PREEMPT_NOTIFIERS
79 struct preempt_notifier preempt_notifier
;
85 unsigned long requests
;
86 unsigned long guest_debug
;
92 struct kvm_vcpu_stat stat
;
94 #ifdef CONFIG_HAS_IOMEM
96 int mmio_read_completed
;
99 unsigned char mmio_data
[8];
100 gpa_t mmio_phys_addr
;
103 struct kvm_vcpu_arch arch
;
106 struct kvm_memory_slot
{
108 unsigned long npages
;
111 unsigned long *dirty_bitmap
;
113 unsigned long rmap_pde
;
115 } *lpage_info
[KVM_NR_PAGE_SIZES
- 1];
116 unsigned long userspace_addr
;
120 struct kvm_kernel_irq_routing_entry
{
123 int (*set
)(struct kvm_kernel_irq_routing_entry
*e
,
124 struct kvm
*kvm
, int level
);
132 struct list_head link
;
137 spinlock_t requests_lock
;
138 struct rw_semaphore slots_lock
;
139 struct mm_struct
*mm
; /* userspace tied to this vm */
141 struct kvm_memory_slot memslots
[KVM_MEMORY_SLOTS
+
142 KVM_PRIVATE_MEM_SLOTS
];
143 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
145 struct kvm_vcpu
*bsp_vcpu
;
147 struct kvm_vcpu
*vcpus
[KVM_MAX_VCPUS
];
148 atomic_t online_vcpus
;
149 struct list_head vm_list
;
151 struct kvm_io_bus mmio_bus
;
152 struct kvm_io_bus pio_bus
;
153 #ifdef CONFIG_HAVE_KVM_EVENTFD
156 struct list_head items
;
158 struct list_head ioeventfds
;
160 struct kvm_vm_stat stat
;
161 struct kvm_arch arch
;
162 atomic_t users_count
;
163 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
164 struct kvm_coalesced_mmio_dev
*coalesced_mmio_dev
;
165 struct kvm_coalesced_mmio_ring
*coalesced_mmio_ring
;
168 struct mutex irq_lock
;
169 #ifdef CONFIG_HAVE_KVM_IRQCHIP
170 struct list_head irq_routing
; /* of kvm_kernel_irq_routing_entry */
171 struct hlist_head mask_notifier_list
;
174 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
175 struct mmu_notifier mmu_notifier
;
176 unsigned long mmu_notifier_seq
;
177 long mmu_notifier_count
;
181 /* The guest did something we don't support. */
182 #define pr_unimpl(vcpu, fmt, ...) \
184 if (printk_ratelimit()) \
185 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
186 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
189 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
190 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
192 static inline struct kvm_vcpu
*kvm_get_vcpu(struct kvm
*kvm
, int i
)
195 return kvm
->vcpus
[i
];
198 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
199 for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \
200 idx < atomic_read(&kvm->online_vcpus) && vcpup; \
201 vcpup = kvm_get_vcpu(kvm, ++idx))
203 int kvm_vcpu_init(struct kvm_vcpu
*vcpu
, struct kvm
*kvm
, unsigned id
);
204 void kvm_vcpu_uninit(struct kvm_vcpu
*vcpu
);
206 void vcpu_load(struct kvm_vcpu
*vcpu
);
207 void vcpu_put(struct kvm_vcpu
*vcpu
);
209 int kvm_init(void *opaque
, unsigned int vcpu_size
,
210 struct module
*module
);
213 void kvm_get_kvm(struct kvm
*kvm
);
214 void kvm_put_kvm(struct kvm
*kvm
);
216 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
217 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
218 static inline int is_error_hpa(hpa_t hpa
) { return hpa
>> HPA_MSB
; }
219 struct page
*gva_to_page(struct kvm_vcpu
*vcpu
, gva_t gva
);
221 extern struct page
*bad_page
;
222 extern pfn_t bad_pfn
;
224 int is_error_page(struct page
*page
);
225 int is_error_pfn(pfn_t pfn
);
226 int kvm_is_error_hva(unsigned long addr
);
227 int kvm_set_memory_region(struct kvm
*kvm
,
228 struct kvm_userspace_memory_region
*mem
,
230 int __kvm_set_memory_region(struct kvm
*kvm
,
231 struct kvm_userspace_memory_region
*mem
,
233 int kvm_arch_set_memory_region(struct kvm
*kvm
,
234 struct kvm_userspace_memory_region
*mem
,
235 struct kvm_memory_slot old
,
237 void kvm_disable_largepages(void);
238 void kvm_arch_flush_shadow(struct kvm
*kvm
);
239 gfn_t
unalias_gfn(struct kvm
*kvm
, gfn_t gfn
);
240 struct page
*gfn_to_page(struct kvm
*kvm
, gfn_t gfn
);
241 unsigned long gfn_to_hva(struct kvm
*kvm
, gfn_t gfn
);
242 void kvm_release_page_clean(struct page
*page
);
243 void kvm_release_page_dirty(struct page
*page
);
244 void kvm_set_page_dirty(struct page
*page
);
245 void kvm_set_page_accessed(struct page
*page
);
247 pfn_t
gfn_to_pfn(struct kvm
*kvm
, gfn_t gfn
);
248 void kvm_release_pfn_dirty(pfn_t
);
249 void kvm_release_pfn_clean(pfn_t pfn
);
250 void kvm_set_pfn_dirty(pfn_t pfn
);
251 void kvm_set_pfn_accessed(pfn_t pfn
);
252 void kvm_get_pfn(pfn_t pfn
);
254 int kvm_read_guest_page(struct kvm
*kvm
, gfn_t gfn
, void *data
, int offset
,
256 int kvm_read_guest_atomic(struct kvm
*kvm
, gpa_t gpa
, void *data
,
258 int kvm_read_guest(struct kvm
*kvm
, gpa_t gpa
, void *data
, unsigned long len
);
259 int kvm_write_guest_page(struct kvm
*kvm
, gfn_t gfn
, const void *data
,
260 int offset
, int len
);
261 int kvm_write_guest(struct kvm
*kvm
, gpa_t gpa
, const void *data
,
263 int kvm_clear_guest_page(struct kvm
*kvm
, gfn_t gfn
, int offset
, int len
);
264 int kvm_clear_guest(struct kvm
*kvm
, gpa_t gpa
, unsigned long len
);
265 struct kvm_memory_slot
*gfn_to_memslot(struct kvm
*kvm
, gfn_t gfn
);
266 int kvm_is_visible_gfn(struct kvm
*kvm
, gfn_t gfn
);
267 void mark_page_dirty(struct kvm
*kvm
, gfn_t gfn
);
269 void kvm_vcpu_block(struct kvm_vcpu
*vcpu
);
270 void kvm_resched(struct kvm_vcpu
*vcpu
);
271 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
);
272 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
);
273 void kvm_flush_remote_tlbs(struct kvm
*kvm
);
274 void kvm_reload_remote_mmus(struct kvm
*kvm
);
276 long kvm_arch_dev_ioctl(struct file
*filp
,
277 unsigned int ioctl
, unsigned long arg
);
278 long kvm_arch_vcpu_ioctl(struct file
*filp
,
279 unsigned int ioctl
, unsigned long arg
);
281 int kvm_dev_ioctl_check_extension(long ext
);
283 int kvm_get_dirty_log(struct kvm
*kvm
,
284 struct kvm_dirty_log
*log
, int *is_dirty
);
285 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
286 struct kvm_dirty_log
*log
);
288 int kvm_vm_ioctl_set_memory_region(struct kvm
*kvm
,
290 kvm_userspace_memory_region
*mem
,
292 long kvm_arch_vm_ioctl(struct file
*filp
,
293 unsigned int ioctl
, unsigned long arg
);
295 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
296 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
298 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
299 struct kvm_translation
*tr
);
301 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
302 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
303 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
304 struct kvm_sregs
*sregs
);
305 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
306 struct kvm_sregs
*sregs
);
307 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
308 struct kvm_mp_state
*mp_state
);
309 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
310 struct kvm_mp_state
*mp_state
);
311 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
312 struct kvm_guest_debug
*dbg
);
313 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
);
315 int kvm_arch_init(void *opaque
);
316 void kvm_arch_exit(void);
318 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
);
319 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
);
321 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
);
322 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
);
323 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
);
324 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
, unsigned int id
);
325 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
);
326 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
);
328 int kvm_arch_vcpu_reset(struct kvm_vcpu
*vcpu
);
329 void kvm_arch_hardware_enable(void *garbage
);
330 void kvm_arch_hardware_disable(void *garbage
);
331 int kvm_arch_hardware_setup(void);
332 void kvm_arch_hardware_unsetup(void);
333 void kvm_arch_check_processor_compat(void *rtn
);
334 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
);
336 void kvm_free_physmem(struct kvm
*kvm
);
338 struct kvm
*kvm_arch_create_vm(void);
339 void kvm_arch_destroy_vm(struct kvm
*kvm
);
340 void kvm_free_all_assigned_devices(struct kvm
*kvm
);
341 void kvm_arch_sync_events(struct kvm
*kvm
);
343 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
);
344 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
346 int kvm_is_mmio_pfn(pfn_t pfn
);
348 struct kvm_irq_ack_notifier
{
349 struct hlist_node link
;
351 void (*irq_acked
)(struct kvm_irq_ack_notifier
*kian
);
354 #define KVM_ASSIGNED_MSIX_PENDING 0x1
355 struct kvm_guest_msix_entry
{
361 struct kvm_assigned_dev_kernel
{
362 struct kvm_irq_ack_notifier ack_notifier
;
363 struct work_struct interrupt_work
;
364 struct list_head list
;
368 unsigned int entries_nr
;
370 bool host_irq_disabled
;
371 struct msix_entry
*host_msix_entries
;
373 struct kvm_guest_msix_entry
*guest_msix_entries
;
374 unsigned long irq_requested_type
;
379 spinlock_t assigned_dev_lock
;
382 struct kvm_irq_mask_notifier
{
383 void (*func
)(struct kvm_irq_mask_notifier
*kimn
, bool masked
);
385 struct hlist_node link
;
388 void kvm_register_irq_mask_notifier(struct kvm
*kvm
, int irq
,
389 struct kvm_irq_mask_notifier
*kimn
);
390 void kvm_unregister_irq_mask_notifier(struct kvm
*kvm
, int irq
,
391 struct kvm_irq_mask_notifier
*kimn
);
392 void kvm_fire_mask_notifiers(struct kvm
*kvm
, int irq
, bool mask
);
394 int kvm_set_irq(struct kvm
*kvm
, int irq_source_id
, int irq
, int level
);
395 void kvm_notify_acked_irq(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
396 void kvm_register_irq_ack_notifier(struct kvm
*kvm
,
397 struct kvm_irq_ack_notifier
*kian
);
398 void kvm_unregister_irq_ack_notifier(struct kvm
*kvm
,
399 struct kvm_irq_ack_notifier
*kian
);
400 int kvm_request_irq_source_id(struct kvm
*kvm
);
401 void kvm_free_irq_source_id(struct kvm
*kvm
, int irq_source_id
);
403 /* For vcpu->arch.iommu_flags */
404 #define KVM_IOMMU_CACHE_COHERENCY 0x1
406 #ifdef CONFIG_IOMMU_API
407 int kvm_iommu_map_pages(struct kvm
*kvm
, gfn_t base_gfn
,
408 unsigned long npages
);
409 int kvm_iommu_map_guest(struct kvm
*kvm
);
410 int kvm_iommu_unmap_guest(struct kvm
*kvm
);
411 int kvm_assign_device(struct kvm
*kvm
,
412 struct kvm_assigned_dev_kernel
*assigned_dev
);
413 int kvm_deassign_device(struct kvm
*kvm
,
414 struct kvm_assigned_dev_kernel
*assigned_dev
);
415 #else /* CONFIG_IOMMU_API */
416 static inline int kvm_iommu_map_pages(struct kvm
*kvm
,
418 unsigned long npages
)
423 static inline int kvm_iommu_map_guest(struct kvm
*kvm
)
428 static inline int kvm_iommu_unmap_guest(struct kvm
*kvm
)
433 static inline int kvm_assign_device(struct kvm
*kvm
,
434 struct kvm_assigned_dev_kernel
*assigned_dev
)
439 static inline int kvm_deassign_device(struct kvm
*kvm
,
440 struct kvm_assigned_dev_kernel
*assigned_dev
)
444 #endif /* CONFIG_IOMMU_API */
446 static inline void kvm_guest_enter(void)
448 account_system_vtime(current
);
449 current
->flags
|= PF_VCPU
;
452 static inline void kvm_guest_exit(void)
454 account_system_vtime(current
);
455 current
->flags
&= ~PF_VCPU
;
458 static inline int memslot_id(struct kvm
*kvm
, struct kvm_memory_slot
*slot
)
460 return slot
- kvm
->memslots
;
463 static inline gpa_t
gfn_to_gpa(gfn_t gfn
)
465 return (gpa_t
)gfn
<< PAGE_SHIFT
;
468 static inline hpa_t
pfn_to_hpa(pfn_t pfn
)
470 return (hpa_t
)pfn
<< PAGE_SHIFT
;
473 static inline void kvm_migrate_timers(struct kvm_vcpu
*vcpu
)
475 set_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
);
483 struct kvm_stats_debugfs_item
{
486 enum kvm_stat_kind kind
;
487 struct dentry
*dentry
;
489 extern struct kvm_stats_debugfs_item debugfs_entries
[];
490 extern struct dentry
*kvm_debugfs_dir
;
492 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
493 static inline int mmu_notifier_retry(struct kvm_vcpu
*vcpu
, unsigned long mmu_seq
)
495 if (unlikely(vcpu
->kvm
->mmu_notifier_count
))
498 * Both reads happen under the mmu_lock and both values are
499 * modified under mmu_lock, so there's no need of smb_rmb()
500 * here in between, otherwise mmu_notifier_count should be
501 * read before mmu_notifier_seq, see
502 * mmu_notifier_invalidate_range_end write side.
504 if (vcpu
->kvm
->mmu_notifier_seq
!= mmu_seq
)
510 #ifdef CONFIG_HAVE_KVM_IRQCHIP
512 #define KVM_MAX_IRQ_ROUTES 1024
514 int kvm_setup_default_irq_routing(struct kvm
*kvm
);
515 int kvm_set_irq_routing(struct kvm
*kvm
,
516 const struct kvm_irq_routing_entry
*entries
,
519 void kvm_free_irq_routing(struct kvm
*kvm
);
523 static inline void kvm_free_irq_routing(struct kvm
*kvm
) {}
527 #ifdef CONFIG_HAVE_KVM_EVENTFD
529 void kvm_eventfd_init(struct kvm
*kvm
);
530 int kvm_irqfd(struct kvm
*kvm
, int fd
, int gsi
, int flags
);
531 void kvm_irqfd_release(struct kvm
*kvm
);
532 int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
);
536 static inline void kvm_eventfd_init(struct kvm
*kvm
) {}
537 static inline int kvm_irqfd(struct kvm
*kvm
, int fd
, int gsi
, int flags
)
542 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
543 static inline int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
)
548 #endif /* CONFIG_HAVE_KVM_EVENTFD */
550 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
551 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu
*vcpu
)
553 return vcpu
->kvm
->bsp_vcpu_id
== vcpu
->vcpu_id
;