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
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
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);
69 #ifdef CONFIG_PREEMPT_NOTIFIERS
70 struct preempt_notifier preempt_notifier;
76 unsigned long requests;
77 unsigned long guest_debug;
83 struct kvm_vcpu_stat stat;
85 #ifdef CONFIG_HAS_IOMEM
87 int mmio_read_completed;
90 unsigned char mmio_data[8];
94 struct kvm_vcpu_arch arch;
97 struct kvm_memory_slot {
102 unsigned long *dirty_bitmap;
104 unsigned long rmap_pde;
107 unsigned long userspace_addr;
111 struct kvm_kernel_irq_routing_entry {
114 int (*set)(struct kvm_kernel_irq_routing_entry *e,
115 struct kvm *kvm, int level);
123 struct list_head link;
127 struct mutex lock; /* protects the vcpus array and APIC accesses */
129 spinlock_t requests_lock;
130 struct rw_semaphore slots_lock;
131 struct mm_struct *mm; /* userspace tied to this vm */
133 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
134 KVM_PRIVATE_MEM_SLOTS];
135 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
136 struct list_head vm_list;
137 struct kvm_io_bus mmio_bus;
138 struct kvm_io_bus pio_bus;
139 #ifdef CONFIG_HAVE_KVM_EVENTFD
142 struct list_head items;
145 struct kvm_vm_stat stat;
146 struct kvm_arch arch;
147 atomic_t users_count;
148 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
149 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
150 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
153 #ifdef CONFIG_HAVE_KVM_IRQCHIP
154 struct list_head irq_routing; /* of kvm_kernel_irq_routing_entry */
155 struct hlist_head mask_notifier_list;
158 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
159 struct mmu_notifier mmu_notifier;
160 unsigned long mmu_notifier_seq;
161 long mmu_notifier_count;
165 /* The guest did something we don't support. */
166 #define pr_unimpl(vcpu, fmt, ...) \
168 if (printk_ratelimit()) \
169 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
170 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
173 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
174 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
176 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
177 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
179 void vcpu_load(struct kvm_vcpu *vcpu);
180 void vcpu_put(struct kvm_vcpu *vcpu);
182 int kvm_init(void *opaque, unsigned int vcpu_size,
183 struct module *module);
186 void kvm_get_kvm(struct kvm *kvm);
187 void kvm_put_kvm(struct kvm *kvm);
189 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
190 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
191 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
192 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
194 extern struct page *bad_page;
195 extern pfn_t bad_pfn;
197 int is_error_page(struct page *page);
198 int is_error_pfn(pfn_t pfn);
199 int kvm_is_error_hva(unsigned long addr);
200 int kvm_set_memory_region(struct kvm *kvm,
201 struct kvm_userspace_memory_region *mem,
203 int __kvm_set_memory_region(struct kvm *kvm,
204 struct kvm_userspace_memory_region *mem,
206 int kvm_arch_set_memory_region(struct kvm *kvm,
207 struct kvm_userspace_memory_region *mem,
208 struct kvm_memory_slot old,
210 void kvm_arch_flush_shadow(struct kvm *kvm);
211 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
212 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
213 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
214 void kvm_release_page_clean(struct page *page);
215 void kvm_release_page_dirty(struct page *page);
216 void kvm_set_page_dirty(struct page *page);
217 void kvm_set_page_accessed(struct page *page);
219 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
220 void kvm_release_pfn_dirty(pfn_t);
221 void kvm_release_pfn_clean(pfn_t pfn);
222 void kvm_set_pfn_dirty(pfn_t pfn);
223 void kvm_set_pfn_accessed(pfn_t pfn);
224 void kvm_get_pfn(pfn_t pfn);
226 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
228 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
230 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
231 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
232 int offset, int len);
233 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
235 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
236 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
237 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
238 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
239 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
241 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
242 void kvm_resched(struct kvm_vcpu *vcpu);
243 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
244 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
245 void kvm_flush_remote_tlbs(struct kvm *kvm);
246 void kvm_reload_remote_mmus(struct kvm *kvm);
248 long kvm_arch_dev_ioctl(struct file *filp,
249 unsigned int ioctl, unsigned long arg);
250 long kvm_arch_vcpu_ioctl(struct file *filp,
251 unsigned int ioctl, unsigned long arg);
252 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
253 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
255 int kvm_dev_ioctl_check_extension(long ext);
257 int kvm_get_dirty_log(struct kvm *kvm,
258 struct kvm_dirty_log *log, int *is_dirty);
259 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
260 struct kvm_dirty_log *log);
262 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
264 kvm_userspace_memory_region *mem,
266 long kvm_arch_vm_ioctl(struct file *filp,
267 unsigned int ioctl, unsigned long arg);
269 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
270 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
272 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
273 struct kvm_translation *tr);
275 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
276 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
277 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
278 struct kvm_sregs *sregs);
279 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
280 struct kvm_sregs *sregs);
281 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
282 struct kvm_mp_state *mp_state);
283 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
284 struct kvm_mp_state *mp_state);
285 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
286 struct kvm_guest_debug *dbg);
287 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
289 int kvm_arch_init(void *opaque);
290 void kvm_arch_exit(void);
292 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
293 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
295 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
296 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
297 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
298 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
299 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
300 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
302 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
303 void kvm_arch_hardware_enable(void *garbage);
304 void kvm_arch_hardware_disable(void *garbage);
305 int kvm_arch_hardware_setup(void);
306 void kvm_arch_hardware_unsetup(void);
307 void kvm_arch_check_processor_compat(void *rtn);
308 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
309 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu);
311 void kvm_free_physmem(struct kvm *kvm);
313 struct kvm *kvm_arch_create_vm(void);
314 void kvm_arch_destroy_vm(struct kvm *kvm);
315 void kvm_free_all_assigned_devices(struct kvm *kvm);
316 void kvm_arch_sync_events(struct kvm *kvm);
318 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
319 int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
320 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
321 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
323 int kvm_is_mmio_pfn(pfn_t pfn);
325 struct kvm_irq_ack_notifier {
326 struct hlist_node link;
328 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
331 #define KVM_ASSIGNED_MSIX_PENDING 0x1
332 struct kvm_guest_msix_entry {
338 struct kvm_assigned_dev_kernel {
339 struct kvm_irq_ack_notifier ack_notifier;
340 struct work_struct interrupt_work;
341 struct list_head list;
345 unsigned int entries_nr;
347 bool host_irq_disabled;
348 struct msix_entry *host_msix_entries;
350 struct kvm_guest_msix_entry *guest_msix_entries;
351 unsigned long irq_requested_type;
356 spinlock_t assigned_dev_lock;
359 struct kvm_irq_mask_notifier {
360 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
362 struct hlist_node link;
365 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
366 struct kvm_irq_mask_notifier *kimn);
367 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
368 struct kvm_irq_mask_notifier *kimn);
369 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
371 int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level);
372 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
373 void kvm_register_irq_ack_notifier(struct kvm *kvm,
374 struct kvm_irq_ack_notifier *kian);
375 void kvm_unregister_irq_ack_notifier(struct kvm_irq_ack_notifier *kian);
376 int kvm_request_irq_source_id(struct kvm *kvm);
377 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
379 /* For vcpu->arch.iommu_flags */
380 #define KVM_IOMMU_CACHE_COHERENCY 0x1
382 #ifdef CONFIG_IOMMU_API
383 int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn,
384 unsigned long npages);
385 int kvm_iommu_map_guest(struct kvm *kvm);
386 int kvm_iommu_unmap_guest(struct kvm *kvm);
387 int kvm_assign_device(struct kvm *kvm,
388 struct kvm_assigned_dev_kernel *assigned_dev);
389 int kvm_deassign_device(struct kvm *kvm,
390 struct kvm_assigned_dev_kernel *assigned_dev);
391 #else /* CONFIG_IOMMU_API */
392 static inline int kvm_iommu_map_pages(struct kvm *kvm,
394 unsigned long npages)
399 static inline int kvm_iommu_map_guest(struct kvm *kvm)
404 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
409 static inline int kvm_assign_device(struct kvm *kvm,
410 struct kvm_assigned_dev_kernel *assigned_dev)
415 static inline int kvm_deassign_device(struct kvm *kvm,
416 struct kvm_assigned_dev_kernel *assigned_dev)
420 #endif /* CONFIG_IOMMU_API */
422 static inline void kvm_guest_enter(void)
424 account_system_vtime(current);
425 current->flags |= PF_VCPU;
428 static inline void kvm_guest_exit(void)
430 account_system_vtime(current);
431 current->flags &= ~PF_VCPU;
434 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
436 return slot - kvm->memslots;
439 static inline gpa_t gfn_to_gpa(gfn_t gfn)
441 return (gpa_t)gfn << PAGE_SHIFT;
444 static inline hpa_t pfn_to_hpa(pfn_t pfn)
446 return (hpa_t)pfn << PAGE_SHIFT;
449 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
451 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
459 struct kvm_stats_debugfs_item {
462 enum kvm_stat_kind kind;
463 struct dentry *dentry;
465 extern struct kvm_stats_debugfs_item debugfs_entries[];
466 extern struct dentry *kvm_debugfs_dir;
468 #define KVMTRACE_5D(evt, vcpu, d1, d2, d3, d4, d5, name) \
469 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
470 vcpu, 5, d1, d2, d3, d4, d5)
471 #define KVMTRACE_4D(evt, vcpu, d1, d2, d3, d4, name) \
472 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
473 vcpu, 4, d1, d2, d3, d4, 0)
474 #define KVMTRACE_3D(evt, vcpu, d1, d2, d3, name) \
475 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
476 vcpu, 3, d1, d2, d3, 0, 0)
477 #define KVMTRACE_2D(evt, vcpu, d1, d2, name) \
478 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
479 vcpu, 2, d1, d2, 0, 0, 0)
480 #define KVMTRACE_1D(evt, vcpu, d1, name) \
481 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
482 vcpu, 1, d1, 0, 0, 0, 0)
483 #define KVMTRACE_0D(evt, vcpu, name) \
484 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
485 vcpu, 0, 0, 0, 0, 0, 0)
487 #ifdef CONFIG_KVM_TRACE
488 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg);
489 void kvm_trace_cleanup(void);
492 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg)
496 #define kvm_trace_cleanup() ((void)0)
499 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
500 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
502 if (unlikely(vcpu->kvm->mmu_notifier_count))
505 * Both reads happen under the mmu_lock and both values are
506 * modified under mmu_lock, so there's no need of smb_rmb()
507 * here in between, otherwise mmu_notifier_count should be
508 * read before mmu_notifier_seq, see
509 * mmu_notifier_invalidate_range_end write side.
511 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
517 #ifdef CONFIG_HAVE_KVM_IRQCHIP
519 #define KVM_MAX_IRQ_ROUTES 1024
521 int kvm_setup_default_irq_routing(struct kvm *kvm);
522 int kvm_set_irq_routing(struct kvm *kvm,
523 const struct kvm_irq_routing_entry *entries,
526 void kvm_free_irq_routing(struct kvm *kvm);
530 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
534 #ifdef CONFIG_HAVE_KVM_EVENTFD
536 void kvm_irqfd_init(struct kvm *kvm);
537 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
538 void kvm_irqfd_release(struct kvm *kvm);
542 static inline void kvm_irqfd_init(struct kvm *kvm) {}
543 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
548 static inline void kvm_irqfd_release(struct kvm *kvm) {}
550 #endif /* CONFIG_HAVE_KVM_EVENTFD */