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 <asm/signal.h>
20 #include <linux/kvm.h>
21 #include <linux/kvm_para.h>
23 #include <linux/kvm_types.h>
25 #include <asm/kvm_host.h>
27 #define KVM_MAX_VCPUS 16
28 #define KVM_MEMORY_SLOTS 32
29 /* memory slots that does not exposed to userspace */
30 #define KVM_PRIVATE_MEM_SLOTS 4
32 #define KVM_PIO_PAGE_OFFSET 1
35 * vcpu->requests bit members
37 #define KVM_REQ_TLB_FLUSH 0
38 #define KVM_REQ_MIGRATE_TIMER 1
39 #define KVM_REQ_REPORT_TPR_ACCESS 2
40 #define KVM_REQ_MMU_RELOAD 3
41 #define KVM_REQ_TRIPLE_FAULT 4
44 extern struct kmem_cache *kvm_vcpu_cache;
46 struct kvm_guest_debug {
53 * It would be nice to use something smarter than a linear search, TBD...
54 * Thankfully we dont expect many devices to register (famous last words :),
55 * so until then it will suffice. At least its abstracted so we can change
60 #define NR_IOBUS_DEVS 6
61 struct kvm_io_device *devs[NR_IOBUS_DEVS];
64 void kvm_io_bus_init(struct kvm_io_bus *bus);
65 void kvm_io_bus_destroy(struct kvm_io_bus *bus);
66 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
67 void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
68 struct kvm_io_device *dev);
72 #ifdef CONFIG_PREEMPT_NOTIFIERS
73 struct preempt_notifier preempt_notifier;
80 unsigned long requests;
81 struct kvm_guest_debug guest_debug;
87 struct kvm_vcpu_stat stat;
89 #ifdef CONFIG_HAS_IOMEM
91 int mmio_read_completed;
94 unsigned char mmio_data[8];
98 struct kvm_vcpu_arch arch;
101 struct kvm_memory_slot {
103 unsigned long npages;
106 unsigned long *dirty_bitmap;
108 unsigned long rmap_pde;
111 unsigned long userspace_addr;
116 struct mutex lock; /* protects the vcpus array and APIC accesses */
118 struct rw_semaphore slots_lock;
119 struct mm_struct *mm; /* userspace tied to this vm */
121 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
122 KVM_PRIVATE_MEM_SLOTS];
123 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
124 struct list_head vm_list;
126 struct kvm_io_bus mmio_bus;
127 struct kvm_io_bus pio_bus;
128 struct kvm_vm_stat stat;
129 struct kvm_arch arch;
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 void decache_vcpus_on_cpu(int cpu);
152 int kvm_init(void *opaque, unsigned int vcpu_size,
153 struct module *module);
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;
163 int is_error_page(struct page *page);
164 int kvm_is_error_hva(unsigned long addr);
165 int kvm_set_memory_region(struct kvm *kvm,
166 struct kvm_userspace_memory_region *mem,
168 int __kvm_set_memory_region(struct kvm *kvm,
169 struct kvm_userspace_memory_region *mem,
171 int kvm_arch_set_memory_region(struct kvm *kvm,
172 struct kvm_userspace_memory_region *mem,
173 struct kvm_memory_slot old,
175 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
176 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
177 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
178 void kvm_release_page_clean(struct page *page);
179 void kvm_release_page_dirty(struct page *page);
180 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
182 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
184 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
185 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
186 int offset, int len);
187 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
189 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
190 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
191 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
192 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
193 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
195 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
196 void kvm_resched(struct kvm_vcpu *vcpu);
197 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
198 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
199 void kvm_flush_remote_tlbs(struct kvm *kvm);
200 void kvm_reload_remote_mmus(struct kvm *kvm);
202 long kvm_arch_dev_ioctl(struct file *filp,
203 unsigned int ioctl, unsigned long arg);
204 long kvm_arch_vcpu_ioctl(struct file *filp,
205 unsigned int ioctl, unsigned long arg);
206 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
207 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
209 int kvm_dev_ioctl_check_extension(long ext);
211 int kvm_get_dirty_log(struct kvm *kvm,
212 struct kvm_dirty_log *log, int *is_dirty);
213 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
214 struct kvm_dirty_log *log);
216 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
218 kvm_userspace_memory_region *mem,
220 long kvm_arch_vm_ioctl(struct file *filp,
221 unsigned int ioctl, unsigned long arg);
222 void kvm_arch_destroy_vm(struct kvm *kvm);
224 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
225 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
227 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
228 struct kvm_translation *tr);
230 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
231 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
232 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
233 struct kvm_sregs *sregs);
234 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
235 struct kvm_sregs *sregs);
236 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
237 struct kvm_debug_guest *dbg);
238 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
240 int kvm_arch_init(void *opaque);
241 void kvm_arch_exit(void);
243 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
244 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
246 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
247 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
248 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
249 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
250 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
251 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
253 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
254 void kvm_arch_hardware_enable(void *garbage);
255 void kvm_arch_hardware_disable(void *garbage);
256 int kvm_arch_hardware_setup(void);
257 void kvm_arch_hardware_unsetup(void);
258 void kvm_arch_check_processor_compat(void *rtn);
259 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
261 void kvm_free_physmem(struct kvm *kvm);
263 struct kvm *kvm_arch_create_vm(void);
264 void kvm_arch_destroy_vm(struct kvm *kvm);
266 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
267 int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
268 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
270 static inline void kvm_guest_enter(void)
272 account_system_vtime(current);
273 current->flags |= PF_VCPU;
276 static inline void kvm_guest_exit(void)
278 account_system_vtime(current);
279 current->flags &= ~PF_VCPU;
282 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
284 return slot - kvm->memslots;
287 static inline gpa_t gfn_to_gpa(gfn_t gfn)
289 return (gpa_t)gfn << PAGE_SHIFT;
292 static inline void kvm_migrate_apic_timer(struct kvm_vcpu *vcpu)
294 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
302 struct kvm_stats_debugfs_item {
305 enum kvm_stat_kind kind;
306 struct dentry *dentry;
308 extern struct kvm_stats_debugfs_item debugfs_entries[];