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>
27 #define KVM_MAX_VCPUS 4
28 #define KVM_MEMORY_SLOTS 8
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
41 extern struct kmem_cache *kvm_vcpu_cache;
43 struct kvm_guest_debug {
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 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
64 void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
65 struct kvm_io_device *dev);
69 struct preempt_notifier preempt_notifier;
75 unsigned long requests;
76 struct kvm_guest_debug 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;
102 unsigned long userspace_addr;
107 struct mutex lock; /* protects everything except vcpus */
108 struct mm_struct *mm; /* userspace tied to this vm */
110 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
111 KVM_PRIVATE_MEM_SLOTS];
112 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
113 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;
121 /* The guest did something we don't support. */
122 #define pr_unimpl(vcpu, fmt, ...) \
124 if (printk_ratelimit()) \
125 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
126 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
129 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
130 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
132 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
133 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
135 void vcpu_load(struct kvm_vcpu *vcpu);
136 void vcpu_put(struct kvm_vcpu *vcpu);
138 void decache_vcpus_on_cpu(int cpu);
141 int kvm_init(void *opaque, unsigned int vcpu_size,
142 struct module *module);
145 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
146 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
147 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
148 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
150 extern struct page *bad_page;
152 int is_error_page(struct page *page);
153 int kvm_is_error_hva(unsigned long addr);
154 int kvm_set_memory_region(struct kvm *kvm,
155 struct kvm_userspace_memory_region *mem,
157 int __kvm_set_memory_region(struct kvm *kvm,
158 struct kvm_userspace_memory_region *mem,
160 int kvm_arch_set_memory_region(struct kvm *kvm,
161 struct kvm_userspace_memory_region *mem,
162 struct kvm_memory_slot old,
164 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
165 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
166 void kvm_release_page_clean(struct page *page);
167 void kvm_release_page_dirty(struct page *page);
168 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
170 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
171 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
172 int offset, int len);
173 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
175 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
176 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
177 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
178 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
179 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
181 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
182 void kvm_resched(struct kvm_vcpu *vcpu);
183 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
184 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
185 void kvm_flush_remote_tlbs(struct kvm *kvm);
187 long kvm_arch_dev_ioctl(struct file *filp,
188 unsigned int ioctl, unsigned long arg);
189 long kvm_arch_vcpu_ioctl(struct file *filp,
190 unsigned int ioctl, unsigned long arg);
191 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
192 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
194 int kvm_dev_ioctl_check_extension(long ext);
196 int kvm_get_dirty_log(struct kvm *kvm,
197 struct kvm_dirty_log *log, int *is_dirty);
198 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
199 struct kvm_dirty_log *log);
201 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
203 kvm_userspace_memory_region *mem,
205 long kvm_arch_vm_ioctl(struct file *filp,
206 unsigned int ioctl, unsigned long arg);
207 void kvm_arch_destroy_vm(struct kvm *kvm);
209 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
210 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
212 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
213 struct kvm_translation *tr);
215 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
216 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
217 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
218 struct kvm_sregs *sregs);
219 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
220 struct kvm_sregs *sregs);
221 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
222 struct kvm_debug_guest *dbg);
223 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
225 int kvm_arch_init(void *opaque);
226 void kvm_arch_exit(void);
228 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
229 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
231 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
232 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
233 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
234 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
235 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
236 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
238 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
239 void kvm_arch_hardware_enable(void *garbage);
240 void kvm_arch_hardware_disable(void *garbage);
241 int kvm_arch_hardware_setup(void);
242 void kvm_arch_hardware_unsetup(void);
243 void kvm_arch_check_processor_compat(void *rtn);
244 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
246 void kvm_free_physmem(struct kvm *kvm);
248 struct kvm *kvm_arch_create_vm(void);
249 void kvm_arch_destroy_vm(struct kvm *kvm);
251 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
252 int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
254 static inline void kvm_guest_enter(void)
256 account_system_vtime(current);
257 current->flags |= PF_VCPU;
260 static inline void kvm_guest_exit(void)
262 account_system_vtime(current);
263 current->flags &= ~PF_VCPU;
266 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
268 return slot - kvm->memslots;
271 static inline gpa_t gfn_to_gpa(gfn_t gfn)
273 return (gpa_t)gfn << PAGE_SHIFT;
281 struct kvm_stats_debugfs_item {
284 enum kvm_stat_kind kind;
285 struct dentry *dentry;
287 extern struct kvm_stats_debugfs_item debugfs_entries[];