afs: remove cache.h
[linux-2.6/linux-2.6-openrd.git] / include / linux / kvm_host.h
blobb7bbb5ddd7aec861215887db80008b2b54543f79
1 #ifndef __KVM_HOST_H
2 #define __KVM_HOST_H
4 /*
5 * This work is licensed under the terms of the GNU GPL, version 2. See
6 * the COPYING file in the top-level directory.
7 */
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/mm.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
42 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
44 struct kvm;
45 struct kvm_vcpu;
46 extern struct kmem_cache *kvm_vcpu_cache;
49 * It would be nice to use something smarter than a linear search, TBD...
50 * Thankfully we dont expect many devices to register (famous last words :),
51 * so until then it will suffice. At least its abstracted so we can change
52 * in one place.
54 struct kvm_io_bus {
55 int dev_count;
56 #define NR_IOBUS_DEVS 6
57 struct kvm_io_device *devs[NR_IOBUS_DEVS];
60 void kvm_io_bus_init(struct kvm_io_bus *bus);
61 void kvm_io_bus_destroy(struct kvm_io_bus *bus);
62 int kvm_io_bus_write(struct kvm_io_bus *bus, gpa_t addr, int len,
63 const void *val);
64 int kvm_io_bus_read(struct kvm_io_bus *bus, gpa_t addr, int len,
65 void *val);
66 int __kvm_io_bus_register_dev(struct kvm_io_bus *bus,
67 struct kvm_io_device *dev);
68 int kvm_io_bus_register_dev(struct kvm *kvm, struct kvm_io_bus *bus,
69 struct kvm_io_device *dev);
70 void __kvm_io_bus_unregister_dev(struct kvm_io_bus *bus,
71 struct kvm_io_device *dev);
72 void kvm_io_bus_unregister_dev(struct kvm *kvm, struct kvm_io_bus *bus,
73 struct kvm_io_device *dev);
75 struct kvm_vcpu {
76 struct kvm *kvm;
77 #ifdef CONFIG_PREEMPT_NOTIFIERS
78 struct preempt_notifier preempt_notifier;
79 #endif
80 int vcpu_id;
81 struct mutex mutex;
82 int cpu;
83 struct kvm_run *run;
84 unsigned long requests;
85 unsigned long guest_debug;
86 int fpu_active;
87 int guest_fpu_loaded;
88 wait_queue_head_t wq;
89 int sigset_active;
90 sigset_t sigset;
91 struct kvm_vcpu_stat stat;
93 #ifdef CONFIG_HAS_IOMEM
94 int mmio_needed;
95 int mmio_read_completed;
96 int mmio_is_write;
97 int mmio_size;
98 unsigned char mmio_data[8];
99 gpa_t mmio_phys_addr;
100 #endif
102 struct kvm_vcpu_arch arch;
105 struct kvm_memory_slot {
106 gfn_t base_gfn;
107 unsigned long npages;
108 unsigned long flags;
109 unsigned long *rmap;
110 unsigned long *dirty_bitmap;
111 struct {
112 unsigned long rmap_pde;
113 int write_count;
114 } *lpage_info[KVM_NR_PAGE_SIZES - 1];
115 unsigned long userspace_addr;
116 int user_alloc;
119 struct kvm_kernel_irq_routing_entry {
120 u32 gsi;
121 u32 type;
122 int (*set)(struct kvm_kernel_irq_routing_entry *e,
123 struct kvm *kvm, int level);
124 union {
125 struct {
126 unsigned irqchip;
127 unsigned pin;
128 } irqchip;
129 struct msi_msg msi;
131 struct list_head link;
134 struct kvm {
135 spinlock_t mmu_lock;
136 spinlock_t requests_lock;
137 struct rw_semaphore slots_lock;
138 struct mm_struct *mm; /* userspace tied to this vm */
139 int nmemslots;
140 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
141 KVM_PRIVATE_MEM_SLOTS];
142 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
143 u32 bsp_vcpu_id;
144 struct kvm_vcpu *bsp_vcpu;
145 #endif
146 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
147 atomic_t online_vcpus;
148 struct list_head vm_list;
149 struct mutex lock;
150 struct kvm_io_bus mmio_bus;
151 struct kvm_io_bus pio_bus;
152 #ifdef CONFIG_HAVE_KVM_EVENTFD
153 struct {
154 spinlock_t lock;
155 struct list_head items;
156 } irqfds;
157 struct list_head ioeventfds;
158 #endif
159 struct kvm_vm_stat stat;
160 struct kvm_arch arch;
161 atomic_t users_count;
162 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
163 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
164 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
165 #endif
167 struct mutex irq_lock;
168 #ifdef CONFIG_HAVE_KVM_IRQCHIP
169 struct list_head irq_routing; /* of kvm_kernel_irq_routing_entry */
170 struct hlist_head mask_notifier_list;
171 #endif
173 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
174 struct mmu_notifier mmu_notifier;
175 unsigned long mmu_notifier_seq;
176 long mmu_notifier_count;
177 #endif
180 /* The guest did something we don't support. */
181 #define pr_unimpl(vcpu, fmt, ...) \
182 do { \
183 if (printk_ratelimit()) \
184 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
185 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
186 } while (0)
188 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
189 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
191 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
193 smp_rmb();
194 return kvm->vcpus[i];
197 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
198 for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \
199 idx < atomic_read(&kvm->online_vcpus) && vcpup; \
200 vcpup = kvm_get_vcpu(kvm, ++idx))
202 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
203 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
205 void vcpu_load(struct kvm_vcpu *vcpu);
206 void vcpu_put(struct kvm_vcpu *vcpu);
208 int kvm_init(void *opaque, unsigned int vcpu_size,
209 struct module *module);
210 void kvm_exit(void);
212 void kvm_get_kvm(struct kvm *kvm);
213 void kvm_put_kvm(struct kvm *kvm);
215 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
216 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
217 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
218 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
220 extern struct page *bad_page;
221 extern pfn_t bad_pfn;
223 int is_error_page(struct page *page);
224 int is_error_pfn(pfn_t pfn);
225 int kvm_is_error_hva(unsigned long addr);
226 int kvm_set_memory_region(struct kvm *kvm,
227 struct kvm_userspace_memory_region *mem,
228 int user_alloc);
229 int __kvm_set_memory_region(struct kvm *kvm,
230 struct kvm_userspace_memory_region *mem,
231 int user_alloc);
232 int kvm_arch_set_memory_region(struct kvm *kvm,
233 struct kvm_userspace_memory_region *mem,
234 struct kvm_memory_slot old,
235 int user_alloc);
236 void kvm_disable_largepages(void);
237 void kvm_arch_flush_shadow(struct kvm *kvm);
238 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
239 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
240 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
241 void kvm_release_page_clean(struct page *page);
242 void kvm_release_page_dirty(struct page *page);
243 void kvm_set_page_dirty(struct page *page);
244 void kvm_set_page_accessed(struct page *page);
246 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
247 void kvm_release_pfn_dirty(pfn_t);
248 void kvm_release_pfn_clean(pfn_t pfn);
249 void kvm_set_pfn_dirty(pfn_t pfn);
250 void kvm_set_pfn_accessed(pfn_t pfn);
251 void kvm_get_pfn(pfn_t pfn);
253 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
254 int len);
255 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
256 unsigned long len);
257 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
258 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
259 int offset, int len);
260 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
261 unsigned long len);
262 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
263 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
264 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
265 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
266 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
268 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
269 void kvm_resched(struct kvm_vcpu *vcpu);
270 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
271 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
272 void kvm_flush_remote_tlbs(struct kvm *kvm);
273 void kvm_reload_remote_mmus(struct kvm *kvm);
275 long kvm_arch_dev_ioctl(struct file *filp,
276 unsigned int ioctl, unsigned long arg);
277 long kvm_arch_vcpu_ioctl(struct file *filp,
278 unsigned int ioctl, unsigned long arg);
280 int kvm_dev_ioctl_check_extension(long ext);
282 int kvm_get_dirty_log(struct kvm *kvm,
283 struct kvm_dirty_log *log, int *is_dirty);
284 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
285 struct kvm_dirty_log *log);
287 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
288 struct
289 kvm_userspace_memory_region *mem,
290 int user_alloc);
291 long kvm_arch_vm_ioctl(struct file *filp,
292 unsigned int ioctl, unsigned long arg);
294 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
295 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
297 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
298 struct kvm_translation *tr);
300 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
301 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
302 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
303 struct kvm_sregs *sregs);
304 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
305 struct kvm_sregs *sregs);
306 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
307 struct kvm_mp_state *mp_state);
308 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
309 struct kvm_mp_state *mp_state);
310 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
311 struct kvm_guest_debug *dbg);
312 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
314 int kvm_arch_init(void *opaque);
315 void kvm_arch_exit(void);
317 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
318 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
320 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
321 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
322 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
323 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
324 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
325 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
327 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
328 void kvm_arch_hardware_enable(void *garbage);
329 void kvm_arch_hardware_disable(void *garbage);
330 int kvm_arch_hardware_setup(void);
331 void kvm_arch_hardware_unsetup(void);
332 void kvm_arch_check_processor_compat(void *rtn);
333 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
335 void kvm_free_physmem(struct kvm *kvm);
337 struct kvm *kvm_arch_create_vm(void);
338 void kvm_arch_destroy_vm(struct kvm *kvm);
339 void kvm_free_all_assigned_devices(struct kvm *kvm);
340 void kvm_arch_sync_events(struct kvm *kvm);
342 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
343 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
345 int kvm_is_mmio_pfn(pfn_t pfn);
347 struct kvm_irq_ack_notifier {
348 struct hlist_node link;
349 unsigned gsi;
350 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
353 #define KVM_ASSIGNED_MSIX_PENDING 0x1
354 struct kvm_guest_msix_entry {
355 u32 vector;
356 u16 entry;
357 u16 flags;
360 struct kvm_assigned_dev_kernel {
361 struct kvm_irq_ack_notifier ack_notifier;
362 struct work_struct interrupt_work;
363 struct list_head list;
364 int assigned_dev_id;
365 int host_busnr;
366 int host_devfn;
367 unsigned int entries_nr;
368 int host_irq;
369 bool host_irq_disabled;
370 struct msix_entry *host_msix_entries;
371 int guest_irq;
372 struct kvm_guest_msix_entry *guest_msix_entries;
373 unsigned long irq_requested_type;
374 int irq_source_id;
375 int flags;
376 struct pci_dev *dev;
377 struct kvm *kvm;
378 spinlock_t assigned_dev_lock;
381 struct kvm_irq_mask_notifier {
382 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
383 int irq;
384 struct hlist_node link;
387 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
388 struct kvm_irq_mask_notifier *kimn);
389 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
390 struct kvm_irq_mask_notifier *kimn);
391 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
393 int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level);
394 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
395 void kvm_register_irq_ack_notifier(struct kvm *kvm,
396 struct kvm_irq_ack_notifier *kian);
397 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
398 struct kvm_irq_ack_notifier *kian);
399 int kvm_request_irq_source_id(struct kvm *kvm);
400 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
402 /* For vcpu->arch.iommu_flags */
403 #define KVM_IOMMU_CACHE_COHERENCY 0x1
405 #ifdef CONFIG_IOMMU_API
406 int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn,
407 unsigned long npages);
408 int kvm_iommu_map_guest(struct kvm *kvm);
409 int kvm_iommu_unmap_guest(struct kvm *kvm);
410 int kvm_assign_device(struct kvm *kvm,
411 struct kvm_assigned_dev_kernel *assigned_dev);
412 int kvm_deassign_device(struct kvm *kvm,
413 struct kvm_assigned_dev_kernel *assigned_dev);
414 #else /* CONFIG_IOMMU_API */
415 static inline int kvm_iommu_map_pages(struct kvm *kvm,
416 gfn_t base_gfn,
417 unsigned long npages)
419 return 0;
422 static inline int kvm_iommu_map_guest(struct kvm *kvm)
424 return -ENODEV;
427 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
429 return 0;
432 static inline int kvm_assign_device(struct kvm *kvm,
433 struct kvm_assigned_dev_kernel *assigned_dev)
435 return 0;
438 static inline int kvm_deassign_device(struct kvm *kvm,
439 struct kvm_assigned_dev_kernel *assigned_dev)
441 return 0;
443 #endif /* CONFIG_IOMMU_API */
445 static inline void kvm_guest_enter(void)
447 account_system_vtime(current);
448 current->flags |= PF_VCPU;
451 static inline void kvm_guest_exit(void)
453 account_system_vtime(current);
454 current->flags &= ~PF_VCPU;
457 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
459 return slot - kvm->memslots;
462 static inline gpa_t gfn_to_gpa(gfn_t gfn)
464 return (gpa_t)gfn << PAGE_SHIFT;
467 static inline hpa_t pfn_to_hpa(pfn_t pfn)
469 return (hpa_t)pfn << PAGE_SHIFT;
472 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
474 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
477 enum kvm_stat_kind {
478 KVM_STAT_VM,
479 KVM_STAT_VCPU,
482 struct kvm_stats_debugfs_item {
483 const char *name;
484 int offset;
485 enum kvm_stat_kind kind;
486 struct dentry *dentry;
488 extern struct kvm_stats_debugfs_item debugfs_entries[];
489 extern struct dentry *kvm_debugfs_dir;
491 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
492 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
494 if (unlikely(vcpu->kvm->mmu_notifier_count))
495 return 1;
497 * Both reads happen under the mmu_lock and both values are
498 * modified under mmu_lock, so there's no need of smb_rmb()
499 * here in between, otherwise mmu_notifier_count should be
500 * read before mmu_notifier_seq, see
501 * mmu_notifier_invalidate_range_end write side.
503 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
504 return 1;
505 return 0;
507 #endif
509 #ifdef CONFIG_HAVE_KVM_IRQCHIP
511 #define KVM_MAX_IRQ_ROUTES 1024
513 int kvm_setup_default_irq_routing(struct kvm *kvm);
514 int kvm_set_irq_routing(struct kvm *kvm,
515 const struct kvm_irq_routing_entry *entries,
516 unsigned nr,
517 unsigned flags);
518 void kvm_free_irq_routing(struct kvm *kvm);
520 #else
522 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
524 #endif
526 #ifdef CONFIG_HAVE_KVM_EVENTFD
528 void kvm_eventfd_init(struct kvm *kvm);
529 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
530 void kvm_irqfd_release(struct kvm *kvm);
531 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
533 #else
535 static inline void kvm_eventfd_init(struct kvm *kvm) {}
536 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
538 return -EINVAL;
541 static inline void kvm_irqfd_release(struct kvm *kvm) {}
542 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
544 return -ENOSYS;
547 #endif /* CONFIG_HAVE_KVM_EVENTFD */
549 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
550 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
552 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
554 #endif
555 #endif