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
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];
61 void kvm_io_bus_init(struct kvm_io_bus *bus);
62 void kvm_io_bus_destroy(struct kvm_io_bus *bus);
63 int kvm_io_bus_write(struct kvm_io_bus *bus, gpa_t addr, int len,
65 int kvm_io_bus_read(struct kvm_io_bus *bus, gpa_t addr, int len,
67 void __kvm_io_bus_register_dev(struct kvm_io_bus *bus,
68 struct kvm_io_device *dev);
69 void kvm_io_bus_register_dev(struct kvm *kvm, struct kvm_io_bus *bus,
70 struct kvm_io_device *dev);
74 #ifdef CONFIG_PREEMPT_NOTIFIERS
75 struct preempt_notifier preempt_notifier;
81 unsigned long requests;
82 unsigned long guest_debug;
88 struct kvm_vcpu_stat stat;
90 #ifdef CONFIG_HAS_IOMEM
92 int mmio_read_completed;
95 unsigned char mmio_data[8];
99 struct kvm_vcpu_arch arch;
102 struct kvm_memory_slot {
104 unsigned long npages;
107 unsigned long *dirty_bitmap;
109 unsigned long rmap_pde;
111 } *lpage_info[KVM_NR_PAGE_SIZES - 1];
112 unsigned long userspace_addr;
116 struct kvm_kernel_irq_routing_entry {
119 int (*set)(struct kvm_kernel_irq_routing_entry *e,
120 struct kvm *kvm, int level);
128 struct list_head link;
133 spinlock_t requests_lock;
134 struct rw_semaphore slots_lock;
135 struct mm_struct *mm; /* userspace tied to this vm */
137 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
138 KVM_PRIVATE_MEM_SLOTS];
139 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
141 struct kvm_vcpu *bsp_vcpu;
143 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
144 atomic_t online_vcpus;
145 struct list_head vm_list;
147 struct kvm_io_bus mmio_bus;
148 struct kvm_io_bus pio_bus;
149 #ifdef CONFIG_HAVE_KVM_EVENTFD
152 struct list_head items;
155 struct kvm_vm_stat stat;
156 struct kvm_arch arch;
157 atomic_t users_count;
158 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
159 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
160 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
163 struct mutex irq_lock;
164 #ifdef CONFIG_HAVE_KVM_IRQCHIP
165 struct list_head irq_routing; /* of kvm_kernel_irq_routing_entry */
166 struct hlist_head mask_notifier_list;
169 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
170 struct mmu_notifier mmu_notifier;
171 unsigned long mmu_notifier_seq;
172 long mmu_notifier_count;
176 /* The guest did something we don't support. */
177 #define pr_unimpl(vcpu, fmt, ...) \
179 if (printk_ratelimit()) \
180 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
181 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
184 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
185 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
187 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
190 return kvm->vcpus[i];
193 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
194 for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \
195 idx < atomic_read(&kvm->online_vcpus) && vcpup; \
196 vcpup = kvm_get_vcpu(kvm, ++idx))
198 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
199 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
201 void vcpu_load(struct kvm_vcpu *vcpu);
202 void vcpu_put(struct kvm_vcpu *vcpu);
204 int kvm_init(void *opaque, unsigned int vcpu_size,
205 struct module *module);
208 void kvm_get_kvm(struct kvm *kvm);
209 void kvm_put_kvm(struct kvm *kvm);
211 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
212 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
213 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
214 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
216 extern struct page *bad_page;
217 extern pfn_t bad_pfn;
219 int is_error_page(struct page *page);
220 int is_error_pfn(pfn_t pfn);
221 int kvm_is_error_hva(unsigned long addr);
222 int kvm_set_memory_region(struct kvm *kvm,
223 struct kvm_userspace_memory_region *mem,
225 int __kvm_set_memory_region(struct kvm *kvm,
226 struct kvm_userspace_memory_region *mem,
228 int kvm_arch_set_memory_region(struct kvm *kvm,
229 struct kvm_userspace_memory_region *mem,
230 struct kvm_memory_slot old,
232 void kvm_disable_largepages(void);
233 void kvm_arch_flush_shadow(struct kvm *kvm);
234 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
235 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
236 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
237 void kvm_release_page_clean(struct page *page);
238 void kvm_release_page_dirty(struct page *page);
239 void kvm_set_page_dirty(struct page *page);
240 void kvm_set_page_accessed(struct page *page);
242 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
243 void kvm_release_pfn_dirty(pfn_t);
244 void kvm_release_pfn_clean(pfn_t pfn);
245 void kvm_set_pfn_dirty(pfn_t pfn);
246 void kvm_set_pfn_accessed(pfn_t pfn);
247 void kvm_get_pfn(pfn_t pfn);
249 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
251 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
253 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
254 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
255 int offset, int len);
256 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
258 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
259 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
260 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
261 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
262 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
264 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
265 void kvm_resched(struct kvm_vcpu *vcpu);
266 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
267 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
268 void kvm_flush_remote_tlbs(struct kvm *kvm);
269 void kvm_reload_remote_mmus(struct kvm *kvm);
271 long kvm_arch_dev_ioctl(struct file *filp,
272 unsigned int ioctl, unsigned long arg);
273 long kvm_arch_vcpu_ioctl(struct file *filp,
274 unsigned int ioctl, unsigned long arg);
276 int kvm_dev_ioctl_check_extension(long ext);
278 int kvm_get_dirty_log(struct kvm *kvm,
279 struct kvm_dirty_log *log, int *is_dirty);
280 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
281 struct kvm_dirty_log *log);
283 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
285 kvm_userspace_memory_region *mem,
287 long kvm_arch_vm_ioctl(struct file *filp,
288 unsigned int ioctl, unsigned long arg);
290 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
291 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
293 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
294 struct kvm_translation *tr);
296 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
297 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
298 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
299 struct kvm_sregs *sregs);
300 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
301 struct kvm_sregs *sregs);
302 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
303 struct kvm_mp_state *mp_state);
304 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
305 struct kvm_mp_state *mp_state);
306 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
307 struct kvm_guest_debug *dbg);
308 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
310 int kvm_arch_init(void *opaque);
311 void kvm_arch_exit(void);
313 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
314 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
316 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
317 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
318 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
319 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
320 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
321 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
323 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
324 void kvm_arch_hardware_enable(void *garbage);
325 void kvm_arch_hardware_disable(void *garbage);
326 int kvm_arch_hardware_setup(void);
327 void kvm_arch_hardware_unsetup(void);
328 void kvm_arch_check_processor_compat(void *rtn);
329 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
330 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu);
332 void kvm_free_physmem(struct kvm *kvm);
334 struct kvm *kvm_arch_create_vm(void);
335 void kvm_arch_destroy_vm(struct kvm *kvm);
336 void kvm_free_all_assigned_devices(struct kvm *kvm);
337 void kvm_arch_sync_events(struct kvm *kvm);
339 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
340 int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
341 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
342 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
344 int kvm_is_mmio_pfn(pfn_t pfn);
346 struct kvm_irq_ack_notifier {
347 struct hlist_node link;
349 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
352 #define KVM_ASSIGNED_MSIX_PENDING 0x1
353 struct kvm_guest_msix_entry {
359 struct kvm_assigned_dev_kernel {
360 struct kvm_irq_ack_notifier ack_notifier;
361 struct work_struct interrupt_work;
362 struct list_head list;
366 unsigned int entries_nr;
368 bool host_irq_disabled;
369 struct msix_entry *host_msix_entries;
371 struct kvm_guest_msix_entry *guest_msix_entries;
372 unsigned long irq_requested_type;
377 spinlock_t assigned_dev_lock;
380 struct kvm_irq_mask_notifier {
381 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
383 struct hlist_node link;
386 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
387 struct kvm_irq_mask_notifier *kimn);
388 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
389 struct kvm_irq_mask_notifier *kimn);
390 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
392 int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level);
393 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
394 void kvm_register_irq_ack_notifier(struct kvm *kvm,
395 struct kvm_irq_ack_notifier *kian);
396 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
397 struct kvm_irq_ack_notifier *kian);
398 int kvm_request_irq_source_id(struct kvm *kvm);
399 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
401 /* For vcpu->arch.iommu_flags */
402 #define KVM_IOMMU_CACHE_COHERENCY 0x1
404 #ifdef CONFIG_IOMMU_API
405 int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn,
406 unsigned long npages);
407 int kvm_iommu_map_guest(struct kvm *kvm);
408 int kvm_iommu_unmap_guest(struct kvm *kvm);
409 int kvm_assign_device(struct kvm *kvm,
410 struct kvm_assigned_dev_kernel *assigned_dev);
411 int kvm_deassign_device(struct kvm *kvm,
412 struct kvm_assigned_dev_kernel *assigned_dev);
413 #else /* CONFIG_IOMMU_API */
414 static inline int kvm_iommu_map_pages(struct kvm *kvm,
416 unsigned long npages)
421 static inline int kvm_iommu_map_guest(struct kvm *kvm)
426 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
431 static inline int kvm_assign_device(struct kvm *kvm,
432 struct kvm_assigned_dev_kernel *assigned_dev)
437 static inline int kvm_deassign_device(struct kvm *kvm,
438 struct kvm_assigned_dev_kernel *assigned_dev)
442 #endif /* CONFIG_IOMMU_API */
444 static inline void kvm_guest_enter(void)
446 account_system_vtime(current);
447 current->flags |= PF_VCPU;
450 static inline void kvm_guest_exit(void)
452 account_system_vtime(current);
453 current->flags &= ~PF_VCPU;
456 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
458 return slot - kvm->memslots;
461 static inline gpa_t gfn_to_gpa(gfn_t gfn)
463 return (gpa_t)gfn << PAGE_SHIFT;
466 static inline hpa_t pfn_to_hpa(pfn_t pfn)
468 return (hpa_t)pfn << PAGE_SHIFT;
471 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
473 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
481 struct kvm_stats_debugfs_item {
484 enum kvm_stat_kind kind;
485 struct dentry *dentry;
487 extern struct kvm_stats_debugfs_item debugfs_entries[];
488 extern struct dentry *kvm_debugfs_dir;
490 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
491 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
493 if (unlikely(vcpu->kvm->mmu_notifier_count))
496 * Both reads happen under the mmu_lock and both values are
497 * modified under mmu_lock, so there's no need of smb_rmb()
498 * here in between, otherwise mmu_notifier_count should be
499 * read before mmu_notifier_seq, see
500 * mmu_notifier_invalidate_range_end write side.
502 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
508 #ifdef CONFIG_HAVE_KVM_IRQCHIP
510 #define KVM_MAX_IRQ_ROUTES 1024
512 int kvm_setup_default_irq_routing(struct kvm *kvm);
513 int kvm_set_irq_routing(struct kvm *kvm,
514 const struct kvm_irq_routing_entry *entries,
517 void kvm_free_irq_routing(struct kvm *kvm);
521 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
525 #ifdef CONFIG_HAVE_KVM_EVENTFD
527 void kvm_irqfd_init(struct kvm *kvm);
528 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
529 void kvm_irqfd_release(struct kvm *kvm);
533 static inline void kvm_irqfd_init(struct kvm *kvm) {}
534 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
539 static inline void kvm_irqfd_release(struct kvm *kvm) {}
541 #endif /* CONFIG_HAVE_KVM_EVENTFD */
543 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
544 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
546 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;