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[cor_2_6_31.git] / include / linux / kvm_host.h
blob16713dc672e4215b4ae2b092980181cdf29a12e4
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/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
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 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus,
63 gpa_t addr, int len, int is_write);
64 void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
65 struct kvm_io_device *dev);
67 struct kvm_vcpu {
68 struct kvm *kvm;
69 #ifdef CONFIG_PREEMPT_NOTIFIERS
70 struct preempt_notifier preempt_notifier;
71 #endif
72 int vcpu_id;
73 struct mutex mutex;
74 int cpu;
75 struct kvm_run *run;
76 unsigned long requests;
77 unsigned long guest_debug;
78 int fpu_active;
79 int guest_fpu_loaded;
80 wait_queue_head_t wq;
81 int sigset_active;
82 sigset_t sigset;
83 struct kvm_vcpu_stat stat;
85 #ifdef CONFIG_HAS_IOMEM
86 int mmio_needed;
87 int mmio_read_completed;
88 int mmio_is_write;
89 int mmio_size;
90 unsigned char mmio_data[8];
91 gpa_t mmio_phys_addr;
92 #endif
94 struct kvm_vcpu_arch arch;
97 struct kvm_memory_slot {
98 gfn_t base_gfn;
99 unsigned long npages;
100 unsigned long flags;
101 unsigned long *rmap;
102 unsigned long *dirty_bitmap;
103 struct {
104 unsigned long rmap_pde;
105 int write_count;
106 } *lpage_info;
107 unsigned long userspace_addr;
108 int user_alloc;
111 struct kvm_kernel_irq_routing_entry {
112 u32 gsi;
113 int (*set)(struct kvm_kernel_irq_routing_entry *e,
114 struct kvm *kvm, int level);
115 union {
116 struct {
117 unsigned irqchip;
118 unsigned pin;
119 } irqchip;
120 struct msi_msg msi;
122 struct list_head link;
125 struct kvm {
126 struct mutex lock; /* protects the vcpus array and APIC accesses */
127 spinlock_t mmu_lock;
128 spinlock_t requests_lock;
129 struct rw_semaphore slots_lock;
130 struct mm_struct *mm; /* userspace tied to this vm */
131 int nmemslots;
132 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
133 KVM_PRIVATE_MEM_SLOTS];
134 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
135 struct list_head vm_list;
136 struct kvm_io_bus mmio_bus;
137 struct kvm_io_bus pio_bus;
138 struct kvm_vm_stat stat;
139 struct kvm_arch arch;
140 atomic_t users_count;
141 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
142 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
143 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
144 #endif
146 #ifdef CONFIG_HAVE_KVM_IRQCHIP
147 struct list_head irq_routing; /* of kvm_kernel_irq_routing_entry */
148 struct hlist_head mask_notifier_list;
149 #endif
151 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
152 struct mmu_notifier mmu_notifier;
153 unsigned long mmu_notifier_seq;
154 long mmu_notifier_count;
155 #endif
158 /* The guest did something we don't support. */
159 #define pr_unimpl(vcpu, fmt, ...) \
160 do { \
161 if (printk_ratelimit()) \
162 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
163 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
164 } while (0)
166 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
167 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
169 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
170 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
172 void vcpu_load(struct kvm_vcpu *vcpu);
173 void vcpu_put(struct kvm_vcpu *vcpu);
175 int kvm_init(void *opaque, unsigned int vcpu_size,
176 struct module *module);
177 void kvm_exit(void);
179 void kvm_get_kvm(struct kvm *kvm);
180 void kvm_put_kvm(struct kvm *kvm);
182 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
183 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
184 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
185 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
187 extern struct page *bad_page;
188 extern pfn_t bad_pfn;
190 int is_error_page(struct page *page);
191 int is_error_pfn(pfn_t pfn);
192 int kvm_is_error_hva(unsigned long addr);
193 int kvm_set_memory_region(struct kvm *kvm,
194 struct kvm_userspace_memory_region *mem,
195 int user_alloc);
196 int __kvm_set_memory_region(struct kvm *kvm,
197 struct kvm_userspace_memory_region *mem,
198 int user_alloc);
199 int kvm_arch_set_memory_region(struct kvm *kvm,
200 struct kvm_userspace_memory_region *mem,
201 struct kvm_memory_slot old,
202 int user_alloc);
203 void kvm_arch_flush_shadow(struct kvm *kvm);
204 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
205 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
206 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
207 void kvm_release_page_clean(struct page *page);
208 void kvm_release_page_dirty(struct page *page);
209 void kvm_set_page_dirty(struct page *page);
210 void kvm_set_page_accessed(struct page *page);
212 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
213 void kvm_release_pfn_dirty(pfn_t);
214 void kvm_release_pfn_clean(pfn_t pfn);
215 void kvm_set_pfn_dirty(pfn_t pfn);
216 void kvm_set_pfn_accessed(pfn_t pfn);
217 void kvm_get_pfn(pfn_t pfn);
219 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
220 int len);
221 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
222 unsigned long len);
223 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
224 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
225 int offset, int len);
226 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
227 unsigned long len);
228 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
229 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
230 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
231 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
232 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
234 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
235 void kvm_resched(struct kvm_vcpu *vcpu);
236 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
237 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
238 void kvm_flush_remote_tlbs(struct kvm *kvm);
239 void kvm_reload_remote_mmus(struct kvm *kvm);
241 long kvm_arch_dev_ioctl(struct file *filp,
242 unsigned int ioctl, unsigned long arg);
243 long kvm_arch_vcpu_ioctl(struct file *filp,
244 unsigned int ioctl, unsigned long arg);
245 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
246 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
248 int kvm_dev_ioctl_check_extension(long ext);
250 int kvm_get_dirty_log(struct kvm *kvm,
251 struct kvm_dirty_log *log, int *is_dirty);
252 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
253 struct kvm_dirty_log *log);
255 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
256 struct
257 kvm_userspace_memory_region *mem,
258 int user_alloc);
259 long kvm_arch_vm_ioctl(struct file *filp,
260 unsigned int ioctl, unsigned long arg);
262 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
263 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
265 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
266 struct kvm_translation *tr);
268 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
269 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
270 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
271 struct kvm_sregs *sregs);
272 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
273 struct kvm_sregs *sregs);
274 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
275 struct kvm_mp_state *mp_state);
276 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
277 struct kvm_mp_state *mp_state);
278 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
279 struct kvm_guest_debug *dbg);
280 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
282 int kvm_arch_init(void *opaque);
283 void kvm_arch_exit(void);
285 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
286 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
288 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
289 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
290 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
291 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
292 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
293 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
295 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
296 void kvm_arch_hardware_enable(void *garbage);
297 void kvm_arch_hardware_disable(void *garbage);
298 int kvm_arch_hardware_setup(void);
299 void kvm_arch_hardware_unsetup(void);
300 void kvm_arch_check_processor_compat(void *rtn);
301 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
302 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu);
304 void kvm_free_physmem(struct kvm *kvm);
306 struct kvm *kvm_arch_create_vm(void);
307 void kvm_arch_destroy_vm(struct kvm *kvm);
308 void kvm_free_all_assigned_devices(struct kvm *kvm);
309 void kvm_arch_sync_events(struct kvm *kvm);
311 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
312 int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
313 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
314 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
316 int kvm_is_mmio_pfn(pfn_t pfn);
318 struct kvm_irq_ack_notifier {
319 struct hlist_node link;
320 unsigned gsi;
321 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
324 #define KVM_ASSIGNED_MSIX_PENDING 0x1
325 struct kvm_guest_msix_entry {
326 u32 vector;
327 u16 entry;
328 u16 flags;
331 struct kvm_assigned_dev_kernel {
332 struct kvm_irq_ack_notifier ack_notifier;
333 struct work_struct interrupt_work;
334 struct list_head list;
335 int assigned_dev_id;
336 int host_busnr;
337 int host_devfn;
338 unsigned int entries_nr;
339 int host_irq;
340 bool host_irq_disabled;
341 struct msix_entry *host_msix_entries;
342 int guest_irq;
343 struct kvm_guest_msix_entry *guest_msix_entries;
344 unsigned long irq_requested_type;
345 int irq_source_id;
346 int flags;
347 struct pci_dev *dev;
348 struct kvm *kvm;
349 spinlock_t assigned_dev_lock;
352 struct kvm_irq_mask_notifier {
353 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
354 int irq;
355 struct hlist_node link;
358 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
359 struct kvm_irq_mask_notifier *kimn);
360 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
361 struct kvm_irq_mask_notifier *kimn);
362 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
364 int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level);
365 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
366 void kvm_register_irq_ack_notifier(struct kvm *kvm,
367 struct kvm_irq_ack_notifier *kian);
368 void kvm_unregister_irq_ack_notifier(struct kvm_irq_ack_notifier *kian);
369 int kvm_request_irq_source_id(struct kvm *kvm);
370 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
372 /* For vcpu->arch.iommu_flags */
373 #define KVM_IOMMU_CACHE_COHERENCY 0x1
375 #ifdef CONFIG_IOMMU_API
376 int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn,
377 unsigned long npages);
378 int kvm_iommu_map_guest(struct kvm *kvm);
379 int kvm_iommu_unmap_guest(struct kvm *kvm);
380 int kvm_assign_device(struct kvm *kvm,
381 struct kvm_assigned_dev_kernel *assigned_dev);
382 int kvm_deassign_device(struct kvm *kvm,
383 struct kvm_assigned_dev_kernel *assigned_dev);
384 #else /* CONFIG_IOMMU_API */
385 static inline int kvm_iommu_map_pages(struct kvm *kvm,
386 gfn_t base_gfn,
387 unsigned long npages)
389 return 0;
392 static inline int kvm_iommu_map_guest(struct kvm *kvm)
394 return -ENODEV;
397 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
399 return 0;
402 static inline int kvm_assign_device(struct kvm *kvm,
403 struct kvm_assigned_dev_kernel *assigned_dev)
405 return 0;
408 static inline int kvm_deassign_device(struct kvm *kvm,
409 struct kvm_assigned_dev_kernel *assigned_dev)
411 return 0;
413 #endif /* CONFIG_IOMMU_API */
415 static inline void kvm_guest_enter(void)
417 account_system_vtime(current);
418 current->flags |= PF_VCPU;
421 static inline void kvm_guest_exit(void)
423 account_system_vtime(current);
424 current->flags &= ~PF_VCPU;
427 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
429 return slot - kvm->memslots;
432 static inline gpa_t gfn_to_gpa(gfn_t gfn)
434 return (gpa_t)gfn << PAGE_SHIFT;
437 static inline hpa_t pfn_to_hpa(pfn_t pfn)
439 return (hpa_t)pfn << PAGE_SHIFT;
442 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
444 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
447 enum kvm_stat_kind {
448 KVM_STAT_VM,
449 KVM_STAT_VCPU,
452 struct kvm_stats_debugfs_item {
453 const char *name;
454 int offset;
455 enum kvm_stat_kind kind;
456 struct dentry *dentry;
458 extern struct kvm_stats_debugfs_item debugfs_entries[];
459 extern struct dentry *kvm_debugfs_dir;
461 #define KVMTRACE_5D(evt, vcpu, d1, d2, d3, d4, d5, name) \
462 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
463 vcpu, 5, d1, d2, d3, d4, d5)
464 #define KVMTRACE_4D(evt, vcpu, d1, d2, d3, d4, name) \
465 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
466 vcpu, 4, d1, d2, d3, d4, 0)
467 #define KVMTRACE_3D(evt, vcpu, d1, d2, d3, name) \
468 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
469 vcpu, 3, d1, d2, d3, 0, 0)
470 #define KVMTRACE_2D(evt, vcpu, d1, d2, name) \
471 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
472 vcpu, 2, d1, d2, 0, 0, 0)
473 #define KVMTRACE_1D(evt, vcpu, d1, name) \
474 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
475 vcpu, 1, d1, 0, 0, 0, 0)
476 #define KVMTRACE_0D(evt, vcpu, name) \
477 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
478 vcpu, 0, 0, 0, 0, 0, 0)
480 #ifdef CONFIG_KVM_TRACE
481 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg);
482 void kvm_trace_cleanup(void);
483 #else
484 static inline
485 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg)
487 return -EINVAL;
489 #define kvm_trace_cleanup() ((void)0)
490 #endif
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))
496 return 1;
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)
505 return 1;
506 return 0;
508 #endif
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,
517 unsigned nr,
518 unsigned flags);
519 void kvm_free_irq_routing(struct kvm *kvm);
521 #else
523 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
525 #endif
527 #endif