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/msi.h>
19 #include <asm/signal.h>
21 #include <linux/kvm.h>
22 #include <linux/kvm_para.h>
24 #include <linux/kvm_types.h>
26 #include <asm/kvm_host.h>
29 * vcpu->requests bit members
31 #define KVM_REQ_TLB_FLUSH 0
32 #define KVM_REQ_MIGRATE_TIMER 1
33 #define KVM_REQ_REPORT_TPR_ACCESS 2
34 #define KVM_REQ_MMU_RELOAD 3
35 #define KVM_REQ_TRIPLE_FAULT 4
36 #define KVM_REQ_PENDING_TIMER 5
37 #define KVM_REQ_UNHALT 6
38 #define KVM_REQ_MMU_SYNC 7
39 #define KVM_REQ_KVMCLOCK_UPDATE 8
40 #define KVM_REQ_KICK 9
41 #define KVM_REQ_DEACTIVATE_FPU 10
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
];
67 int kvm_io_bus_write(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
,
68 int len
, const void *val
);
69 int kvm_io_bus_read(struct kvm
*kvm
, enum kvm_bus bus_idx
, gpa_t addr
, int len
,
71 int kvm_io_bus_register_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
,
72 struct kvm_io_device
*dev
);
73 int kvm_io_bus_unregister_dev(struct kvm
*kvm
, enum kvm_bus bus_idx
,
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
;
94 struct kvm_vcpu_stat stat
;
96 #ifdef CONFIG_HAS_IOMEM
98 int mmio_read_completed
;
101 unsigned char mmio_data
[8];
102 gpa_t mmio_phys_addr
;
105 struct kvm_vcpu_arch arch
;
108 struct kvm_memory_slot
{
110 unsigned long npages
;
113 unsigned long *dirty_bitmap
;
115 unsigned long rmap_pde
;
117 } *lpage_info
[KVM_NR_PAGE_SIZES
- 1];
118 unsigned long userspace_addr
;
122 struct kvm_kernel_irq_routing_entry
{
125 int (*set
)(struct kvm_kernel_irq_routing_entry
*e
,
126 struct kvm
*kvm
, int irq_source_id
, int level
);
134 struct hlist_node link
;
137 #ifdef __KVM_HAVE_IOAPIC
139 struct kvm_irq_routing_table
{
140 int chip
[KVM_NR_IRQCHIPS
][KVM_IOAPIC_NUM_PINS
];
141 struct kvm_kernel_irq_routing_entry
*rt_entries
;
144 * Array indexed by gsi. Each entry contains list of irq chips
145 * the gsi is connected to.
147 struct hlist_head map
[0];
152 struct kvm_irq_routing_table
{};
156 struct kvm_memslots
{
158 struct kvm_memory_slot memslots
[KVM_MEMORY_SLOTS
+
159 KVM_PRIVATE_MEM_SLOTS
];
164 raw_spinlock_t requests_lock
;
165 struct mutex slots_lock
;
166 struct mm_struct
*mm
; /* userspace tied to this vm */
167 struct kvm_memslots
*memslots
;
168 struct srcu_struct srcu
;
169 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
171 struct kvm_vcpu
*bsp_vcpu
;
173 struct kvm_vcpu
*vcpus
[KVM_MAX_VCPUS
];
174 atomic_t online_vcpus
;
175 struct list_head vm_list
;
177 struct kvm_io_bus
*buses
[KVM_NR_BUSES
];
178 #ifdef CONFIG_HAVE_KVM_EVENTFD
181 struct list_head items
;
183 struct list_head ioeventfds
;
185 struct kvm_vm_stat stat
;
186 struct kvm_arch arch
;
187 atomic_t users_count
;
188 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
189 struct kvm_coalesced_mmio_dev
*coalesced_mmio_dev
;
190 struct kvm_coalesced_mmio_ring
*coalesced_mmio_ring
;
193 struct mutex irq_lock
;
194 #ifdef CONFIG_HAVE_KVM_IRQCHIP
195 struct kvm_irq_routing_table
*irq_routing
;
196 struct hlist_head mask_notifier_list
;
197 struct hlist_head irq_ack_notifier_list
;
200 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
201 struct mmu_notifier mmu_notifier
;
202 unsigned long mmu_notifier_seq
;
203 long mmu_notifier_count
;
207 /* The guest did something we don't support. */
208 #define pr_unimpl(vcpu, fmt, ...) \
210 if (printk_ratelimit()) \
211 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
212 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
215 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
216 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
218 static inline struct kvm_vcpu
*kvm_get_vcpu(struct kvm
*kvm
, int i
)
221 return kvm
->vcpus
[i
];
224 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
225 for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \
226 idx < atomic_read(&kvm->online_vcpus) && vcpup; \
227 vcpup = kvm_get_vcpu(kvm, ++idx))
229 int kvm_vcpu_init(struct kvm_vcpu
*vcpu
, struct kvm
*kvm
, unsigned id
);
230 void kvm_vcpu_uninit(struct kvm_vcpu
*vcpu
);
232 void vcpu_load(struct kvm_vcpu
*vcpu
);
233 void vcpu_put(struct kvm_vcpu
*vcpu
);
235 int kvm_init(void *opaque
, unsigned int vcpu_size
,
236 struct module
*module
);
239 void kvm_get_kvm(struct kvm
*kvm
);
240 void kvm_put_kvm(struct kvm
*kvm
);
242 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
243 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
244 static inline int is_error_hpa(hpa_t hpa
) { return hpa
>> HPA_MSB
; }
245 struct page
*gva_to_page(struct kvm_vcpu
*vcpu
, gva_t gva
);
247 extern struct page
*bad_page
;
248 extern pfn_t bad_pfn
;
250 int is_error_page(struct page
*page
);
251 int is_error_pfn(pfn_t pfn
);
252 int kvm_is_error_hva(unsigned long addr
);
253 int kvm_set_memory_region(struct kvm
*kvm
,
254 struct kvm_userspace_memory_region
*mem
,
256 int __kvm_set_memory_region(struct kvm
*kvm
,
257 struct kvm_userspace_memory_region
*mem
,
259 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
260 struct kvm_memory_slot
*memslot
,
261 struct kvm_memory_slot old
,
262 struct kvm_userspace_memory_region
*mem
,
264 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
265 struct kvm_userspace_memory_region
*mem
,
266 struct kvm_memory_slot old
,
268 void kvm_disable_largepages(void);
269 void kvm_arch_flush_shadow(struct kvm
*kvm
);
270 gfn_t
unalias_gfn(struct kvm
*kvm
, gfn_t gfn
);
271 gfn_t
unalias_gfn_instantiation(struct kvm
*kvm
, gfn_t gfn
);
273 struct page
*gfn_to_page(struct kvm
*kvm
, gfn_t gfn
);
274 unsigned long gfn_to_hva(struct kvm
*kvm
, gfn_t gfn
);
275 void kvm_release_page_clean(struct page
*page
);
276 void kvm_release_page_dirty(struct page
*page
);
277 void kvm_set_page_dirty(struct page
*page
);
278 void kvm_set_page_accessed(struct page
*page
);
280 pfn_t
gfn_to_pfn(struct kvm
*kvm
, gfn_t gfn
);
281 pfn_t
gfn_to_pfn_memslot(struct kvm
*kvm
,
282 struct kvm_memory_slot
*slot
, gfn_t gfn
);
283 int memslot_id(struct kvm
*kvm
, gfn_t gfn
);
284 void kvm_release_pfn_dirty(pfn_t
);
285 void kvm_release_pfn_clean(pfn_t pfn
);
286 void kvm_set_pfn_dirty(pfn_t pfn
);
287 void kvm_set_pfn_accessed(pfn_t pfn
);
288 void kvm_get_pfn(pfn_t pfn
);
290 int kvm_read_guest_page(struct kvm
*kvm
, gfn_t gfn
, void *data
, int offset
,
292 int kvm_read_guest_atomic(struct kvm
*kvm
, gpa_t gpa
, void *data
,
294 int kvm_read_guest(struct kvm
*kvm
, gpa_t gpa
, void *data
, unsigned long len
);
295 int kvm_write_guest_page(struct kvm
*kvm
, gfn_t gfn
, const void *data
,
296 int offset
, int len
);
297 int kvm_write_guest(struct kvm
*kvm
, gpa_t gpa
, const void *data
,
299 int kvm_clear_guest_page(struct kvm
*kvm
, gfn_t gfn
, int offset
, int len
);
300 int kvm_clear_guest(struct kvm
*kvm
, gpa_t gpa
, unsigned long len
);
301 struct kvm_memory_slot
*gfn_to_memslot(struct kvm
*kvm
, gfn_t gfn
);
302 int kvm_is_visible_gfn(struct kvm
*kvm
, gfn_t gfn
);
303 unsigned long kvm_host_page_size(struct kvm
*kvm
, gfn_t gfn
);
304 void mark_page_dirty(struct kvm
*kvm
, gfn_t gfn
);
306 void kvm_vcpu_block(struct kvm_vcpu
*vcpu
);
307 void kvm_vcpu_on_spin(struct kvm_vcpu
*vcpu
);
308 void kvm_resched(struct kvm_vcpu
*vcpu
);
309 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
);
310 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
);
311 void kvm_flush_remote_tlbs(struct kvm
*kvm
);
312 void kvm_reload_remote_mmus(struct kvm
*kvm
);
314 long kvm_arch_dev_ioctl(struct file
*filp
,
315 unsigned int ioctl
, unsigned long arg
);
316 long kvm_arch_vcpu_ioctl(struct file
*filp
,
317 unsigned int ioctl
, unsigned long arg
);
319 int kvm_dev_ioctl_check_extension(long ext
);
321 int kvm_get_dirty_log(struct kvm
*kvm
,
322 struct kvm_dirty_log
*log
, int *is_dirty
);
323 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
324 struct kvm_dirty_log
*log
);
326 int kvm_vm_ioctl_set_memory_region(struct kvm
*kvm
,
328 kvm_userspace_memory_region
*mem
,
330 long kvm_arch_vm_ioctl(struct file
*filp
,
331 unsigned int ioctl
, unsigned long arg
);
333 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
334 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
);
336 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
337 struct kvm_translation
*tr
);
339 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
340 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
);
341 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
342 struct kvm_sregs
*sregs
);
343 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
344 struct kvm_sregs
*sregs
);
345 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
346 struct kvm_mp_state
*mp_state
);
347 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
348 struct kvm_mp_state
*mp_state
);
349 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
350 struct kvm_guest_debug
*dbg
);
351 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
);
353 int kvm_arch_init(void *opaque
);
354 void kvm_arch_exit(void);
356 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
);
357 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
);
359 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
);
360 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
);
361 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
);
362 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
, unsigned int id
);
363 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
);
364 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
);
366 int kvm_arch_vcpu_reset(struct kvm_vcpu
*vcpu
);
367 int kvm_arch_hardware_enable(void *garbage
);
368 void kvm_arch_hardware_disable(void *garbage
);
369 int kvm_arch_hardware_setup(void);
370 void kvm_arch_hardware_unsetup(void);
371 void kvm_arch_check_processor_compat(void *rtn
);
372 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
);
374 void kvm_free_physmem(struct kvm
*kvm
);
376 struct kvm
*kvm_arch_create_vm(void);
377 void kvm_arch_destroy_vm(struct kvm
*kvm
);
378 void kvm_free_all_assigned_devices(struct kvm
*kvm
);
379 void kvm_arch_sync_events(struct kvm
*kvm
);
381 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
);
382 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
);
384 int kvm_is_mmio_pfn(pfn_t pfn
);
386 struct kvm_irq_ack_notifier
{
387 struct hlist_node link
;
389 void (*irq_acked
)(struct kvm_irq_ack_notifier
*kian
);
392 #define KVM_ASSIGNED_MSIX_PENDING 0x1
393 struct kvm_guest_msix_entry
{
399 struct kvm_assigned_dev_kernel
{
400 struct kvm_irq_ack_notifier ack_notifier
;
401 struct work_struct interrupt_work
;
402 struct list_head list
;
407 unsigned int entries_nr
;
409 bool host_irq_disabled
;
410 struct msix_entry
*host_msix_entries
;
412 struct kvm_guest_msix_entry
*guest_msix_entries
;
413 unsigned long irq_requested_type
;
418 spinlock_t assigned_dev_lock
;
421 struct kvm_irq_mask_notifier
{
422 void (*func
)(struct kvm_irq_mask_notifier
*kimn
, bool masked
);
424 struct hlist_node link
;
427 void kvm_register_irq_mask_notifier(struct kvm
*kvm
, int irq
,
428 struct kvm_irq_mask_notifier
*kimn
);
429 void kvm_unregister_irq_mask_notifier(struct kvm
*kvm
, int irq
,
430 struct kvm_irq_mask_notifier
*kimn
);
431 void kvm_fire_mask_notifiers(struct kvm
*kvm
, int irq
, bool mask
);
433 #ifdef __KVM_HAVE_IOAPIC
434 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic
*ioapic
,
435 union kvm_ioapic_redirect_entry
*entry
,
436 unsigned long *deliver_bitmask
);
438 int kvm_set_irq(struct kvm
*kvm
, int irq_source_id
, u32 irq
, int level
);
439 void kvm_notify_acked_irq(struct kvm
*kvm
, unsigned irqchip
, unsigned pin
);
440 void kvm_register_irq_ack_notifier(struct kvm
*kvm
,
441 struct kvm_irq_ack_notifier
*kian
);
442 void kvm_unregister_irq_ack_notifier(struct kvm
*kvm
,
443 struct kvm_irq_ack_notifier
*kian
);
444 int kvm_request_irq_source_id(struct kvm
*kvm
);
445 void kvm_free_irq_source_id(struct kvm
*kvm
, int irq_source_id
);
447 /* For vcpu->arch.iommu_flags */
448 #define KVM_IOMMU_CACHE_COHERENCY 0x1
450 #ifdef CONFIG_IOMMU_API
451 int kvm_iommu_map_pages(struct kvm
*kvm
, struct kvm_memory_slot
*slot
);
452 int kvm_iommu_map_guest(struct kvm
*kvm
);
453 int kvm_iommu_unmap_guest(struct kvm
*kvm
);
454 int kvm_assign_device(struct kvm
*kvm
,
455 struct kvm_assigned_dev_kernel
*assigned_dev
);
456 int kvm_deassign_device(struct kvm
*kvm
,
457 struct kvm_assigned_dev_kernel
*assigned_dev
);
458 #else /* CONFIG_IOMMU_API */
459 static inline int kvm_iommu_map_pages(struct kvm
*kvm
,
461 unsigned long npages
)
466 static inline int kvm_iommu_map_guest(struct kvm
*kvm
)
471 static inline int kvm_iommu_unmap_guest(struct kvm
*kvm
)
476 static inline int kvm_assign_device(struct kvm
*kvm
,
477 struct kvm_assigned_dev_kernel
*assigned_dev
)
482 static inline int kvm_deassign_device(struct kvm
*kvm
,
483 struct kvm_assigned_dev_kernel
*assigned_dev
)
487 #endif /* CONFIG_IOMMU_API */
489 static inline void kvm_guest_enter(void)
491 account_system_vtime(current
);
492 current
->flags
|= PF_VCPU
;
495 static inline void kvm_guest_exit(void)
497 account_system_vtime(current
);
498 current
->flags
&= ~PF_VCPU
;
501 static inline gpa_t
gfn_to_gpa(gfn_t gfn
)
503 return (gpa_t
)gfn
<< PAGE_SHIFT
;
506 static inline hpa_t
pfn_to_hpa(pfn_t pfn
)
508 return (hpa_t
)pfn
<< PAGE_SHIFT
;
511 static inline void kvm_migrate_timers(struct kvm_vcpu
*vcpu
)
513 set_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
);
521 struct kvm_stats_debugfs_item
{
524 enum kvm_stat_kind kind
;
525 struct dentry
*dentry
;
527 extern struct kvm_stats_debugfs_item debugfs_entries
[];
528 extern struct dentry
*kvm_debugfs_dir
;
530 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
531 static inline int mmu_notifier_retry(struct kvm_vcpu
*vcpu
, unsigned long mmu_seq
)
533 if (unlikely(vcpu
->kvm
->mmu_notifier_count
))
536 * Both reads happen under the mmu_lock and both values are
537 * modified under mmu_lock, so there's no need of smb_rmb()
538 * here in between, otherwise mmu_notifier_count should be
539 * read before mmu_notifier_seq, see
540 * mmu_notifier_invalidate_range_end write side.
542 if (vcpu
->kvm
->mmu_notifier_seq
!= mmu_seq
)
548 #ifndef KVM_ARCH_HAS_UNALIAS_INSTANTIATION
549 #define unalias_gfn_instantiation unalias_gfn
552 #ifdef CONFIG_HAVE_KVM_IRQCHIP
554 #define KVM_MAX_IRQ_ROUTES 1024
556 int kvm_setup_default_irq_routing(struct kvm
*kvm
);
557 int kvm_set_irq_routing(struct kvm
*kvm
,
558 const struct kvm_irq_routing_entry
*entries
,
561 void kvm_free_irq_routing(struct kvm
*kvm
);
565 static inline void kvm_free_irq_routing(struct kvm
*kvm
) {}
569 #ifdef CONFIG_HAVE_KVM_EVENTFD
571 void kvm_eventfd_init(struct kvm
*kvm
);
572 int kvm_irqfd(struct kvm
*kvm
, int fd
, int gsi
, int flags
);
573 void kvm_irqfd_release(struct kvm
*kvm
);
574 int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
);
578 static inline void kvm_eventfd_init(struct kvm
*kvm
) {}
579 static inline int kvm_irqfd(struct kvm
*kvm
, int fd
, int gsi
, int flags
)
584 static inline void kvm_irqfd_release(struct kvm
*kvm
) {}
585 static inline int kvm_ioeventfd(struct kvm
*kvm
, struct kvm_ioeventfd
*args
)
590 #endif /* CONFIG_HAVE_KVM_EVENTFD */
592 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
593 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu
*vcpu
)
595 return vcpu
->kvm
->bsp_vcpu_id
== vcpu
->vcpu_id
;
599 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
601 long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,
606 static inline long kvm_vm_ioctl_assigned_device(struct kvm
*kvm
, unsigned ioctl
,