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 void __kvm_io_bus_register_dev(struct kvm_io_bus
*bus
,
68 struct kvm_io_device
*dev
);
69 void kvm_io_bus_register_dev(struct kvm
*kvm
, struct kvm_io_bus
*bus
,
70 struct kvm_io_device
*dev
);
74 #ifdef CONFIG_PREEMPT_NOTIFIERS
75 struct preempt_notifier preempt_notifier
;
81 unsigned long requests
;
82 unsigned long guest_debug
;
88 struct kvm_vcpu_stat stat
;
90 #ifdef CONFIG_HAS_IOMEM
92 int mmio_read_completed
;
95 unsigned char mmio_data
[8];
99 struct kvm_vcpu_arch arch
;
102 struct kvm_memory_slot
{
104 unsigned long npages
;
107 unsigned long *dirty_bitmap
;
109 unsigned long rmap_pde
;
111 } *lpage_info
[KVM_NR_PAGE_SIZES
- 1];
112 unsigned long userspace_addr
;
116 struct kvm_kernel_irq_routing_entry
{
119 int (*set
)(struct kvm_kernel_irq_routing_entry
*e
,
120 struct kvm
*kvm
, int level
);
128 struct list_head link
;
133 spinlock_t requests_lock
;
134 struct rw_semaphore slots_lock
;
135 struct mm_struct
*mm
; /* userspace tied to this vm */
137 struct kvm_memory_slot memslots
[KVM_MEMORY_SLOTS
+
138 KVM_PRIVATE_MEM_SLOTS
];
139 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
141 struct kvm_vcpu
*bsp_vcpu
;
143 struct kvm_vcpu
*vcpus
[KVM_MAX_VCPUS
];
144 atomic_t online_vcpus
;
145 struct list_head vm_list
;
147 struct kvm_io_bus mmio_bus
;
148 struct kvm_io_bus pio_bus
;
149 #ifdef CONFIG_HAVE_KVM_EVENTFD
152 struct list_head items
;
155 struct kvm_vm_stat stat
;
156 struct kvm_arch arch
;
157 atomic_t users_count
;
158 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
159 struct kvm_coalesced_mmio_dev
*coalesced_mmio_dev
;
160 struct kvm_coalesced_mmio_ring
*coalesced_mmio_ring
;
163 struct mutex irq_lock
;
164 #ifdef CONFIG_HAVE_KVM_IRQCHIP
165 struct list_head irq_routing
; /* of kvm_kernel_irq_routing_entry */
166 struct hlist_head mask_notifier_list
;
169 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
170 struct mmu_notifier mmu_notifier
;
171 unsigned long mmu_notifier_seq
;
172 long mmu_notifier_count
;
176 /* The guest did something we don't support. */
177 #define pr_unimpl(vcpu, fmt, ...) \
179 if (printk_ratelimit()) \
180 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
181 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
184 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
185 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
187 static inline struct kvm_vcpu
*kvm_get_vcpu(struct kvm
*kvm
, int i
)
190 return kvm
->vcpus
[i
];
193 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
194 for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \
195 idx < atomic_read(&kvm->online_vcpus) && vcpup; \
196 vcpup = kvm_get_vcpu(kvm, ++idx))
198 int kvm_vcpu_init(struct kvm_vcpu
*vcpu
, struct kvm
*kvm
, unsigned id
);
199 void kvm_vcpu_uninit(struct kvm_vcpu
*vcpu
);
201 void vcpu_load(struct kvm_vcpu
*vcpu
);
202 void vcpu_put(struct kvm_vcpu
*vcpu
);
204 int kvm_init(void *opaque
, unsigned int vcpu_size
,
205 struct module
*module
);
208 void kvm_get_kvm(struct kvm
*kvm
);
209 void kvm_put_kvm(struct kvm
*kvm
);
211 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
212 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
213 static inline int is_error_hpa(hpa_t hpa
) { return hpa
>> HPA_MSB
; }
214 struct page
*gva_to_page(struct kvm_vcpu
*vcpu
, gva_t gva
);
216 extern struct page
*bad_page
;
217 extern pfn_t bad_pfn
;
219 int is_error_page(struct page
*page
);
220 int is_error_pfn(pfn_t pfn
);
221 int kvm_is_error_hva(unsigned long addr
);
222 int kvm_set_memory_region(struct kvm
*kvm
,
223 struct kvm_userspace_memory_region
*mem
,
225 int __kvm_set_memory_region(struct kvm
*kvm
,
226 struct kvm_userspace_memory_region
*mem
,
228 int kvm_arch_set_memory_region(struct kvm
*kvm
,
229 struct kvm_userspace_memory_region
*mem
,
230 struct kvm_memory_slot old
,
232 void kvm_disable_largepages(void);
233 void kvm_arch_flush_shadow(struct kvm
*kvm
);
234 gfn_t
unalias_gfn(struct kvm
*kvm
, gfn_t gfn
);
235 struct page
*gfn_to_page(struct kvm
*kvm
, gfn_t gfn
);
236 unsigned long gfn_to_hva(struct kvm
*kvm
, gfn_t gfn
);
237 void kvm_release_page_clean(struct page
*page
);
238 void kvm_release_page_dirty(struct page
*page
);
239 void kvm_set_page_dirty(struct page
*page
);
240 void kvm_set_page_accessed(struct page
*page
);
242 pfn_t
gfn_to_pfn(struct kvm
*kvm
, gfn_t gfn
);
243 void kvm_release_pfn_dirty(pfn_t
);
244 void kvm_release_pfn_clean(pfn_t pfn
);
245 void kvm_set_pfn_dirty(pfn_t pfn
);
246 void kvm_set_pfn_accessed(pfn_t pfn
);
247 void kvm_get_pfn(pfn_t pfn
);
249 int kvm_read_guest_page(struct kvm
*kvm
, gfn_t gfn
, void *data
, int offset
,
251 int kvm_read_guest_atomic(struct kvm
*kvm
, gpa_t gpa
, void *data
,
253 int kvm_read_guest(struct kvm
*kvm
, gpa_t gpa
, void *data
, unsigned long len
);
254 int kvm_write_guest_page(struct kvm
*kvm
, gfn_t gfn
, const void *data
,
255 int offset
, int len
);
256 int kvm_write_guest(struct kvm
*kvm
, gpa_t gpa
, const void *data
,
258 int kvm_clear_guest_page(struct kvm
*kvm
, gfn_t gfn
, int offset
, int len
);
259 int kvm_clear_guest(struct kvm
*kvm
, gpa_t gpa
, unsigned long len
);
260 struct kvm_memory_slot
*gfn_to_memslot(struct kvm
*kvm
, gfn_t gfn
);
261 int kvm_is_visible_gfn(struct kvm
*kvm
, gfn_t gfn
);
262 void mark_page_dirty(struct kvm
*kvm
, gfn_t gfn
);
264 void kvm_vcpu_block(struct kvm_vcpu
*vcpu
);
265 void kvm_resched(struct kvm_vcpu
*vcpu
);
266 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
);
267 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
);
268 void kvm_flush_remote_tlbs(struct kvm
*kvm
);
269 void kvm_reload_remote_mmus(struct kvm
*kvm
);
271 long kvm_arch_dev_ioctl(struct file
*filp
,
272 unsigned int ioctl
, unsigned long arg
);
273 long kvm_arch_vcpu_ioctl(struct file
*filp
,
274 unsigned int ioctl
, unsigned long arg
);
276 int kvm_dev_ioctl_check_extension(long ext
);
278 int kvm_get_dirty_log(struct kvm
*kvm
,
279 struct kvm_dirty_log
*log
, int *is_dirty
);
280 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
281 struct kvm_dirty_log
*log
);
283 int kvm_vm_ioctl_set_memory_region(struct kvm
*kvm
,
285 kvm_userspace_memory_region
*mem
,
287 long kvm_arch_vm_ioctl(struct file
*filp
,
288 unsigned int ioctl
, unsigned long arg
);
290 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
291 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
293 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
294 struct kvm_translation
*tr
);
296 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
297 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
298 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
299 struct kvm_sregs
*sregs
);
300 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
301 struct kvm_sregs
*sregs
);
302 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
303 struct kvm_mp_state
*mp_state
);
304 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
305 struct kvm_mp_state
*mp_state
);
306 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
307 struct kvm_guest_debug
*dbg
);
308 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
);
310 int kvm_arch_init(void *opaque
);
311 void kvm_arch_exit(void);
313 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
);
314 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
);
316 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
);
317 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
);
318 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
);
319 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
, unsigned int id
);
320 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
);
321 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
);
323 int kvm_arch_vcpu_reset(struct kvm_vcpu
*vcpu
);
324 void kvm_arch_hardware_enable(void *garbage
);
325 void kvm_arch_hardware_disable(void *garbage
);
326 int kvm_arch_hardware_setup(void);
327 void kvm_arch_hardware_unsetup(void);
328 void kvm_arch_check_processor_compat(void *rtn
);
329 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
);
330 int kvm_arch_interrupt_allowed(struct kvm_vcpu
*vcpu
);
332 void kvm_free_physmem(struct kvm
*kvm
);
334 struct kvm
*kvm_arch_create_vm(void);
335 void kvm_arch_destroy_vm(struct kvm
*kvm
);
336 void kvm_free_all_assigned_devices(struct kvm
*kvm
);
337 void kvm_arch_sync_events(struct kvm
*kvm
);
339 int kvm_cpu_get_interrupt(struct kvm_vcpu
*v
);
340 int kvm_cpu_has_interrupt(struct kvm_vcpu
*v
);
341 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
);
342 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
344 int kvm_is_mmio_pfn(pfn_t pfn
);
346 struct kvm_irq_ack_notifier
{
347 struct hlist_node link
;
349 void (*irq_acked
)(struct kvm_irq_ack_notifier
*kian
);
352 #define KVM_ASSIGNED_MSIX_PENDING 0x1
353 struct kvm_guest_msix_entry
{
359 struct kvm_assigned_dev_kernel
{
360 struct kvm_irq_ack_notifier ack_notifier
;
361 struct work_struct interrupt_work
;
362 struct list_head list
;
366 unsigned int entries_nr
;
368 bool host_irq_disabled
;
369 struct msix_entry
*host_msix_entries
;
371 struct kvm_guest_msix_entry
*guest_msix_entries
;
372 unsigned long irq_requested_type
;
377 spinlock_t assigned_dev_lock
;
380 struct kvm_irq_mask_notifier
{
381 void (*func
)(struct kvm_irq_mask_notifier
*kimn
, bool masked
);
383 struct hlist_node link
;
386 void kvm_register_irq_mask_notifier(struct kvm
*kvm
, int irq
,
387 struct kvm_irq_mask_notifier
*kimn
);
388 void kvm_unregister_irq_mask_notifier(struct kvm
*kvm
, int irq
,
389 struct kvm_irq_mask_notifier
*kimn
);
390 void kvm_fire_mask_notifiers(struct kvm
*kvm
, int irq
, bool mask
);
392 int kvm_set_irq(struct kvm
*kvm
, int irq_source_id
, int irq
, int level
);
393 void kvm_notify_acked_irq(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
394 void kvm_register_irq_ack_notifier(struct kvm
*kvm
,
395 struct kvm_irq_ack_notifier
*kian
);
396 void kvm_unregister_irq_ack_notifier(struct kvm
*kvm
,
397 struct kvm_irq_ack_notifier
*kian
);
398 int kvm_request_irq_source_id(struct kvm
*kvm
);
399 void kvm_free_irq_source_id(struct kvm
*kvm
, int irq_source_id
);
401 /* For vcpu->arch.iommu_flags */
402 #define KVM_IOMMU_CACHE_COHERENCY 0x1
404 #ifdef CONFIG_IOMMU_API
405 int kvm_iommu_map_pages(struct kvm
*kvm
, gfn_t base_gfn
,
406 unsigned long npages
);
407 int kvm_iommu_map_guest(struct kvm
*kvm
);
408 int kvm_iommu_unmap_guest(struct kvm
*kvm
);
409 int kvm_assign_device(struct kvm
*kvm
,
410 struct kvm_assigned_dev_kernel
*assigned_dev
);
411 int kvm_deassign_device(struct kvm
*kvm
,
412 struct kvm_assigned_dev_kernel
*assigned_dev
);
413 #else /* CONFIG_IOMMU_API */
414 static inline int kvm_iommu_map_pages(struct kvm
*kvm
,
416 unsigned long npages
)
421 static inline int kvm_iommu_map_guest(struct kvm
*kvm
)
426 static inline int kvm_iommu_unmap_guest(struct kvm
*kvm
)
431 static inline int kvm_assign_device(struct kvm
*kvm
,
432 struct kvm_assigned_dev_kernel
*assigned_dev
)
437 static inline int kvm_deassign_device(struct kvm
*kvm
,
438 struct kvm_assigned_dev_kernel
*assigned_dev
)
442 #endif /* CONFIG_IOMMU_API */
444 static inline void kvm_guest_enter(void)
446 account_system_vtime(current
);
447 current
->flags
|= PF_VCPU
;
450 static inline void kvm_guest_exit(void)
452 account_system_vtime(current
);
453 current
->flags
&= ~PF_VCPU
;
456 static inline int memslot_id(struct kvm
*kvm
, struct kvm_memory_slot
*slot
)
458 return slot
- kvm
->memslots
;
461 static inline gpa_t
gfn_to_gpa(gfn_t gfn
)
463 return (gpa_t
)gfn
<< PAGE_SHIFT
;
466 static inline hpa_t
pfn_to_hpa(pfn_t pfn
)
468 return (hpa_t
)pfn
<< PAGE_SHIFT
;
471 static inline void kvm_migrate_timers(struct kvm_vcpu
*vcpu
)
473 set_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
);
481 struct kvm_stats_debugfs_item
{
484 enum kvm_stat_kind kind
;
485 struct dentry
*dentry
;
487 extern struct kvm_stats_debugfs_item debugfs_entries
[];
488 extern struct dentry
*kvm_debugfs_dir
;
490 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
491 static inline int mmu_notifier_retry(struct kvm_vcpu
*vcpu
, unsigned long mmu_seq
)
493 if (unlikely(vcpu
->kvm
->mmu_notifier_count
))
496 * Both reads happen under the mmu_lock and both values are
497 * modified under mmu_lock, so there's no need of smb_rmb()
498 * here in between, otherwise mmu_notifier_count should be
499 * read before mmu_notifier_seq, see
500 * mmu_notifier_invalidate_range_end write side.
502 if (vcpu
->kvm
->mmu_notifier_seq
!= mmu_seq
)
508 #ifdef CONFIG_HAVE_KVM_IRQCHIP
510 #define KVM_MAX_IRQ_ROUTES 1024
512 int kvm_setup_default_irq_routing(struct kvm
*kvm
);
513 int kvm_set_irq_routing(struct kvm
*kvm
,
514 const struct kvm_irq_routing_entry
*entries
,
517 void kvm_free_irq_routing(struct kvm
*kvm
);
521 static inline void kvm_free_irq_routing(struct kvm
*kvm
) {}
525 #ifdef CONFIG_HAVE_KVM_EVENTFD
527 void kvm_irqfd_init(struct kvm
*kvm
);
528 int kvm_irqfd(struct kvm
*kvm
, int fd
, int gsi
, int flags
);
529 void kvm_irqfd_release(struct kvm
*kvm
);
533 static inline void kvm_irqfd_init(struct kvm
*kvm
) {}
534 static inline int kvm_irqfd(struct kvm
*kvm
, int fd
, int gsi
, int flags
)
539 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
541 #endif /* CONFIG_HAVE_KVM_EVENTFD */
543 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
544 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu
*vcpu
)
546 return vcpu
->kvm
->bsp_vcpu_id
== vcpu
->vcpu_id
;