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 <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
39 extern struct kmem_cache *kvm_vcpu_cache;
42 * It would be nice to use something smarter than a linear search, TBD...
43 * Thankfully we dont expect many devices to register (famous last words :),
44 * so until then it will suffice. At least its abstracted so we can change
49 #define NR_IOBUS_DEVS 6
50 struct kvm_io_device *devs[NR_IOBUS_DEVS];
53 void kvm_io_bus_init(struct kvm_io_bus *bus);
54 void kvm_io_bus_destroy(struct kvm_io_bus *bus);
55 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus,
56 gpa_t addr, int len, int is_write);
57 void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
58 struct kvm_io_device *dev);
62 #ifdef CONFIG_PREEMPT_NOTIFIERS
63 struct preempt_notifier preempt_notifier;
70 unsigned long requests;
71 struct kvm_guest_debug guest_debug;
77 struct kvm_vcpu_stat stat;
79 #ifdef CONFIG_HAS_IOMEM
81 int mmio_read_completed;
84 unsigned char mmio_data[8];
88 struct kvm_vcpu_arch arch;
91 struct kvm_memory_slot {
96 unsigned long *dirty_bitmap;
98 unsigned long rmap_pde;
101 unsigned long userspace_addr;
106 struct mutex lock; /* protects the vcpus array and APIC accesses */
108 struct rw_semaphore slots_lock;
109 struct mm_struct *mm; /* userspace tied to this vm */
111 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
112 KVM_PRIVATE_MEM_SLOTS];
113 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
114 struct list_head vm_list;
115 struct kvm_io_bus mmio_bus;
116 struct kvm_io_bus pio_bus;
117 struct kvm_vm_stat stat;
118 struct kvm_arch arch;
119 atomic_t users_count;
120 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
121 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
122 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
125 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
126 struct mmu_notifier mmu_notifier;
127 unsigned long mmu_notifier_seq;
128 long mmu_notifier_count;
132 /* The guest did something we don't support. */
133 #define pr_unimpl(vcpu, fmt, ...) \
135 if (printk_ratelimit()) \
136 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
137 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
140 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
141 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
143 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
144 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
146 void vcpu_load(struct kvm_vcpu *vcpu);
147 void vcpu_put(struct kvm_vcpu *vcpu);
149 int kvm_init(void *opaque, unsigned int vcpu_size,
150 struct module *module);
153 void kvm_get_kvm(struct kvm *kvm);
154 void kvm_put_kvm(struct kvm *kvm);
156 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
157 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
158 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
159 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
161 extern struct page *bad_page;
162 extern pfn_t bad_pfn;
164 int is_error_page(struct page *page);
165 int is_error_pfn(pfn_t pfn);
166 int kvm_is_error_hva(unsigned long addr);
167 int kvm_set_memory_region(struct kvm *kvm,
168 struct kvm_userspace_memory_region *mem,
170 int __kvm_set_memory_region(struct kvm *kvm,
171 struct kvm_userspace_memory_region *mem,
173 int kvm_arch_set_memory_region(struct kvm *kvm,
174 struct kvm_userspace_memory_region *mem,
175 struct kvm_memory_slot old,
177 void kvm_arch_flush_shadow(struct kvm *kvm);
178 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
179 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
180 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
181 void kvm_release_page_clean(struct page *page);
182 void kvm_release_page_dirty(struct page *page);
183 void kvm_set_page_dirty(struct page *page);
184 void kvm_set_page_accessed(struct page *page);
186 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
187 void kvm_release_pfn_dirty(pfn_t);
188 void kvm_release_pfn_clean(pfn_t pfn);
189 void kvm_set_pfn_dirty(pfn_t pfn);
190 void kvm_set_pfn_accessed(pfn_t pfn);
191 void kvm_get_pfn(pfn_t pfn);
193 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
195 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
197 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
198 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
199 int offset, int len);
200 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
202 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
203 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
204 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
205 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
206 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
208 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
209 void kvm_resched(struct kvm_vcpu *vcpu);
210 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
211 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
212 void kvm_flush_remote_tlbs(struct kvm *kvm);
213 void kvm_reload_remote_mmus(struct kvm *kvm);
215 long kvm_arch_dev_ioctl(struct file *filp,
216 unsigned int ioctl, unsigned long arg);
217 long kvm_arch_vcpu_ioctl(struct file *filp,
218 unsigned int ioctl, unsigned long arg);
219 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
220 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
222 int kvm_dev_ioctl_check_extension(long ext);
224 int kvm_get_dirty_log(struct kvm *kvm,
225 struct kvm_dirty_log *log, int *is_dirty);
226 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
227 struct kvm_dirty_log *log);
229 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
231 kvm_userspace_memory_region *mem,
233 long kvm_arch_vm_ioctl(struct file *filp,
234 unsigned int ioctl, unsigned long arg);
235 void kvm_arch_destroy_vm(struct kvm *kvm);
237 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
238 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
240 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
241 struct kvm_translation *tr);
243 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
244 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
245 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
246 struct kvm_sregs *sregs);
247 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
248 struct kvm_sregs *sregs);
249 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
250 struct kvm_mp_state *mp_state);
251 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
252 struct kvm_mp_state *mp_state);
253 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
254 struct kvm_debug_guest *dbg);
255 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
257 int kvm_arch_init(void *opaque);
258 void kvm_arch_exit(void);
260 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
261 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
263 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
264 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
265 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
266 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
267 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
268 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
270 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
271 void kvm_arch_hardware_enable(void *garbage);
272 void kvm_arch_hardware_disable(void *garbage);
273 int kvm_arch_hardware_setup(void);
274 void kvm_arch_hardware_unsetup(void);
275 void kvm_arch_check_processor_compat(void *rtn);
276 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
278 void kvm_free_physmem(struct kvm *kvm);
280 struct kvm *kvm_arch_create_vm(void);
281 void kvm_arch_destroy_vm(struct kvm *kvm);
283 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
284 int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
285 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
286 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
288 static inline void kvm_guest_enter(void)
290 account_system_vtime(current);
291 current->flags |= PF_VCPU;
294 static inline void kvm_guest_exit(void)
296 account_system_vtime(current);
297 current->flags &= ~PF_VCPU;
300 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
302 return slot - kvm->memslots;
305 static inline gpa_t gfn_to_gpa(gfn_t gfn)
307 return (gpa_t)gfn << PAGE_SHIFT;
310 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
312 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
320 struct kvm_stats_debugfs_item {
323 enum kvm_stat_kind kind;
324 struct dentry *dentry;
326 extern struct kvm_stats_debugfs_item debugfs_entries[];
327 extern struct dentry *kvm_debugfs_dir;
329 #ifdef CONFIG_KVM_TRACE
330 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg);
331 void kvm_trace_cleanup(void);
334 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg)
338 #define kvm_trace_cleanup() ((void)0)
341 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
342 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
344 if (unlikely(vcpu->kvm->mmu_notifier_count))
347 * Both reads happen under the mmu_lock and both values are
348 * modified under mmu_lock, so there's no need of smb_rmb()
349 * here in between, otherwise mmu_notifier_count should be
350 * read before mmu_notifier_seq, see
351 * mmu_notifier_invalidate_range_end write side.
353 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)