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
41 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
44 extern struct kmem_cache *kvm_vcpu_cache;
47 * It would be nice to use something smarter than a linear search, TBD...
48 * Thankfully we dont expect many devices to register (famous last words :),
49 * so until then it will suffice. At least its abstracted so we can change
54 #define NR_IOBUS_DEVS 6
55 struct kvm_io_device *devs[NR_IOBUS_DEVS];
58 void kvm_io_bus_init(struct kvm_io_bus *bus);
59 void kvm_io_bus_destroy(struct kvm_io_bus *bus);
60 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus,
61 gpa_t addr, int len, int is_write);
62 void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
63 struct kvm_io_device *dev);
67 #ifdef CONFIG_PREEMPT_NOTIFIERS
68 struct preempt_notifier preempt_notifier;
75 unsigned long requests;
76 unsigned long guest_debug;
82 struct kvm_vcpu_stat stat;
84 #ifdef CONFIG_HAS_IOMEM
86 int mmio_read_completed;
89 unsigned char mmio_data[8];
93 struct kvm_vcpu_arch arch;
96 struct kvm_memory_slot {
101 unsigned long *dirty_bitmap;
103 unsigned long rmap_pde;
106 unsigned long userspace_addr;
110 struct kvm_kernel_irq_routing_entry {
112 void (*set)(struct kvm_kernel_irq_routing_entry *e,
113 struct kvm *kvm, int level);
121 struct list_head link;
125 struct mutex lock; /* protects the vcpus array and APIC accesses */
127 struct rw_semaphore slots_lock;
128 struct mm_struct *mm; /* userspace tied to this vm */
130 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
131 KVM_PRIVATE_MEM_SLOTS];
132 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
133 struct list_head vm_list;
134 struct kvm_io_bus mmio_bus;
135 struct kvm_io_bus pio_bus;
136 struct kvm_vm_stat stat;
137 struct kvm_arch arch;
138 atomic_t users_count;
139 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
140 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
141 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
144 #ifdef CONFIG_HAVE_KVM_IRQCHIP
145 struct list_head irq_routing; /* of kvm_kernel_irq_routing_entry */
146 struct hlist_head mask_notifier_list;
149 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
150 struct mmu_notifier mmu_notifier;
151 unsigned long mmu_notifier_seq;
152 long mmu_notifier_count;
156 /* The guest did something we don't support. */
157 #define pr_unimpl(vcpu, fmt, ...) \
159 if (printk_ratelimit()) \
160 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
161 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
164 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
165 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
167 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
168 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
170 void vcpu_load(struct kvm_vcpu *vcpu);
171 void vcpu_put(struct kvm_vcpu *vcpu);
173 int kvm_init(void *opaque, unsigned int vcpu_size,
174 struct module *module);
177 void kvm_get_kvm(struct kvm *kvm);
178 void kvm_put_kvm(struct kvm *kvm);
180 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
181 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
182 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
183 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
185 extern struct page *bad_page;
186 extern pfn_t bad_pfn;
188 int is_error_page(struct page *page);
189 int is_error_pfn(pfn_t pfn);
190 int kvm_is_error_hva(unsigned long addr);
191 int kvm_set_memory_region(struct kvm *kvm,
192 struct kvm_userspace_memory_region *mem,
194 int __kvm_set_memory_region(struct kvm *kvm,
195 struct kvm_userspace_memory_region *mem,
197 int kvm_arch_set_memory_region(struct kvm *kvm,
198 struct kvm_userspace_memory_region *mem,
199 struct kvm_memory_slot old,
201 void kvm_arch_flush_shadow(struct kvm *kvm);
202 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
203 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
204 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
205 void kvm_release_page_clean(struct page *page);
206 void kvm_release_page_dirty(struct page *page);
207 void kvm_set_page_dirty(struct page *page);
208 void kvm_set_page_accessed(struct page *page);
210 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
211 void kvm_release_pfn_dirty(pfn_t);
212 void kvm_release_pfn_clean(pfn_t pfn);
213 void kvm_set_pfn_dirty(pfn_t pfn);
214 void kvm_set_pfn_accessed(pfn_t pfn);
215 void kvm_get_pfn(pfn_t pfn);
217 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
219 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
221 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
222 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
223 int offset, int len);
224 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
226 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
227 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
228 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
229 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
230 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
232 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
233 void kvm_resched(struct kvm_vcpu *vcpu);
234 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
235 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
236 void kvm_flush_remote_tlbs(struct kvm *kvm);
237 void kvm_reload_remote_mmus(struct kvm *kvm);
239 long kvm_arch_dev_ioctl(struct file *filp,
240 unsigned int ioctl, unsigned long arg);
241 long kvm_arch_vcpu_ioctl(struct file *filp,
242 unsigned int ioctl, unsigned long arg);
243 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
244 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
246 int kvm_dev_ioctl_check_extension(long ext);
248 int kvm_get_dirty_log(struct kvm *kvm,
249 struct kvm_dirty_log *log, int *is_dirty);
250 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
251 struct kvm_dirty_log *log);
253 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
255 kvm_userspace_memory_region *mem,
257 long kvm_arch_vm_ioctl(struct file *filp,
258 unsigned int ioctl, unsigned long arg);
260 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
261 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
263 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
264 struct kvm_translation *tr);
266 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
267 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
268 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
269 struct kvm_sregs *sregs);
270 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
271 struct kvm_sregs *sregs);
272 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
273 struct kvm_mp_state *mp_state);
274 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
275 struct kvm_mp_state *mp_state);
276 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
277 struct kvm_guest_debug *dbg);
278 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
280 int kvm_arch_init(void *opaque);
281 void kvm_arch_exit(void);
283 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
284 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
286 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
287 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
288 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
289 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
290 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
291 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
293 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
294 void kvm_arch_hardware_enable(void *garbage);
295 void kvm_arch_hardware_disable(void *garbage);
296 int kvm_arch_hardware_setup(void);
297 void kvm_arch_hardware_unsetup(void);
298 void kvm_arch_check_processor_compat(void *rtn);
299 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
301 void kvm_free_physmem(struct kvm *kvm);
303 struct kvm *kvm_arch_create_vm(void);
304 void kvm_arch_destroy_vm(struct kvm *kvm);
305 void kvm_free_all_assigned_devices(struct kvm *kvm);
306 void kvm_arch_sync_events(struct kvm *kvm);
308 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
309 int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
310 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
311 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
313 int kvm_is_mmio_pfn(pfn_t pfn);
315 struct kvm_irq_ack_notifier {
316 struct hlist_node link;
318 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
321 struct kvm_assigned_dev_kernel {
322 struct kvm_irq_ack_notifier ack_notifier;
323 struct work_struct interrupt_work;
324 struct list_head list;
329 bool host_irq_disabled;
331 #define KVM_ASSIGNED_DEV_GUEST_INTX (1 << 0)
332 #define KVM_ASSIGNED_DEV_GUEST_MSI (1 << 1)
333 #define KVM_ASSIGNED_DEV_HOST_INTX (1 << 8)
334 #define KVM_ASSIGNED_DEV_HOST_MSI (1 << 9)
335 unsigned long irq_requested_type;
342 struct kvm_irq_mask_notifier {
343 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
345 struct hlist_node link;
348 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
349 struct kvm_irq_mask_notifier *kimn);
350 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
351 struct kvm_irq_mask_notifier *kimn);
352 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
354 void kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level);
355 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
356 void kvm_register_irq_ack_notifier(struct kvm *kvm,
357 struct kvm_irq_ack_notifier *kian);
358 void kvm_unregister_irq_ack_notifier(struct kvm_irq_ack_notifier *kian);
359 int kvm_request_irq_source_id(struct kvm *kvm);
360 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
362 #ifdef CONFIG_IOMMU_API
363 int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn,
364 unsigned long npages);
365 int kvm_iommu_map_guest(struct kvm *kvm);
366 int kvm_iommu_unmap_guest(struct kvm *kvm);
367 int kvm_assign_device(struct kvm *kvm,
368 struct kvm_assigned_dev_kernel *assigned_dev);
369 int kvm_deassign_device(struct kvm *kvm,
370 struct kvm_assigned_dev_kernel *assigned_dev);
371 #else /* CONFIG_IOMMU_API */
372 static inline int kvm_iommu_map_pages(struct kvm *kvm,
374 unsigned long npages)
379 static inline int kvm_iommu_map_guest(struct kvm *kvm)
384 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
389 static inline int kvm_assign_device(struct kvm *kvm,
390 struct kvm_assigned_dev_kernel *assigned_dev)
395 static inline int kvm_deassign_device(struct kvm *kvm,
396 struct kvm_assigned_dev_kernel *assigned_dev)
400 #endif /* CONFIG_IOMMU_API */
402 static inline void kvm_guest_enter(void)
404 account_system_vtime(current);
405 current->flags |= PF_VCPU;
408 static inline void kvm_guest_exit(void)
410 account_system_vtime(current);
411 current->flags &= ~PF_VCPU;
414 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
416 return slot - kvm->memslots;
419 static inline gpa_t gfn_to_gpa(gfn_t gfn)
421 return (gpa_t)gfn << PAGE_SHIFT;
424 static inline hpa_t pfn_to_hpa(pfn_t pfn)
426 return (hpa_t)pfn << PAGE_SHIFT;
429 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
431 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
439 struct kvm_stats_debugfs_item {
442 enum kvm_stat_kind kind;
443 struct dentry *dentry;
445 extern struct kvm_stats_debugfs_item debugfs_entries[];
446 extern struct dentry *kvm_debugfs_dir;
448 #define KVMTRACE_5D(evt, vcpu, d1, d2, d3, d4, d5, name) \
449 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
450 vcpu, 5, d1, d2, d3, d4, d5)
451 #define KVMTRACE_4D(evt, vcpu, d1, d2, d3, d4, name) \
452 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
453 vcpu, 4, d1, d2, d3, d4, 0)
454 #define KVMTRACE_3D(evt, vcpu, d1, d2, d3, name) \
455 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
456 vcpu, 3, d1, d2, d3, 0, 0)
457 #define KVMTRACE_2D(evt, vcpu, d1, d2, name) \
458 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
459 vcpu, 2, d1, d2, 0, 0, 0)
460 #define KVMTRACE_1D(evt, vcpu, d1, name) \
461 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
462 vcpu, 1, d1, 0, 0, 0, 0)
463 #define KVMTRACE_0D(evt, vcpu, name) \
464 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
465 vcpu, 0, 0, 0, 0, 0, 0)
467 #ifdef CONFIG_KVM_TRACE
468 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg);
469 void kvm_trace_cleanup(void);
472 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg)
476 #define kvm_trace_cleanup() ((void)0)
479 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
480 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
482 if (unlikely(vcpu->kvm->mmu_notifier_count))
485 * Both reads happen under the mmu_lock and both values are
486 * modified under mmu_lock, so there's no need of smb_rmb()
487 * here in between, otherwise mmu_notifier_count should be
488 * read before mmu_notifier_seq, see
489 * mmu_notifier_invalidate_range_end write side.
491 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
497 #ifdef CONFIG_HAVE_KVM_IRQCHIP
499 #define KVM_MAX_IRQ_ROUTES 1024
501 int kvm_setup_default_irq_routing(struct kvm *kvm);
502 int kvm_set_irq_routing(struct kvm *kvm,
503 const struct kvm_irq_routing_entry *entries,
506 void kvm_free_irq_routing(struct kvm *kvm);
510 static inline void kvm_free_irq_routing(struct kvm *kvm) {}