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
43 extern struct kmem_cache *kvm_vcpu_cache;
45 struct kvm_guest_debug {
52 * It would be nice to use something smarter than a linear search, TBD...
53 * Thankfully we dont expect many devices to register (famous last words :),
54 * so until then it will suffice. At least its abstracted so we can change
59 #define NR_IOBUS_DEVS 6
60 struct kvm_io_device *devs[NR_IOBUS_DEVS];
63 void kvm_io_bus_init(struct kvm_io_bus *bus);
64 void kvm_io_bus_destroy(struct kvm_io_bus *bus);
65 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
66 void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
67 struct kvm_io_device *dev);
71 #ifdef CONFIG_PREEMPT_NOTIFIERS
72 struct preempt_notifier preempt_notifier;
79 unsigned long requests;
80 struct kvm_guest_debug guest_debug;
86 struct kvm_vcpu_stat stat;
88 #ifdef CONFIG_HAS_IOMEM
90 int mmio_read_completed;
93 unsigned char mmio_data[8];
97 struct kvm_vcpu_arch arch;
100 struct kvm_memory_slot {
102 unsigned long npages;
105 unsigned long *dirty_bitmap;
107 unsigned long rmap_pde;
110 unsigned long userspace_addr;
115 struct mutex lock; /* protects the vcpus array and APIC accesses */
117 struct rw_semaphore slots_lock;
118 struct mm_struct *mm; /* userspace tied to this vm */
120 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
121 KVM_PRIVATE_MEM_SLOTS];
122 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
123 struct list_head vm_list;
125 struct kvm_io_bus mmio_bus;
126 struct kvm_io_bus pio_bus;
127 struct kvm_vm_stat stat;
128 struct kvm_arch arch;
131 /* The guest did something we don't support. */
132 #define pr_unimpl(vcpu, fmt, ...) \
134 if (printk_ratelimit()) \
135 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
136 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
139 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
140 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
142 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
143 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
145 void vcpu_load(struct kvm_vcpu *vcpu);
146 void vcpu_put(struct kvm_vcpu *vcpu);
148 void decache_vcpus_on_cpu(int cpu);
151 int kvm_init(void *opaque, unsigned int vcpu_size,
152 struct module *module);
155 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
156 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
157 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
158 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
160 extern struct page *bad_page;
162 int is_error_page(struct page *page);
163 int kvm_is_error_hva(unsigned long addr);
164 int kvm_set_memory_region(struct kvm *kvm,
165 struct kvm_userspace_memory_region *mem,
167 int __kvm_set_memory_region(struct kvm *kvm,
168 struct kvm_userspace_memory_region *mem,
170 int kvm_arch_set_memory_region(struct kvm *kvm,
171 struct kvm_userspace_memory_region *mem,
172 struct kvm_memory_slot old,
174 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
175 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
176 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
177 void kvm_release_page_clean(struct page *page);
178 void kvm_release_page_dirty(struct page *page);
179 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
181 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
183 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
184 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
185 int offset, int len);
186 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
188 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
189 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
190 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
191 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
192 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
194 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
195 void kvm_resched(struct kvm_vcpu *vcpu);
196 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
197 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
198 void kvm_flush_remote_tlbs(struct kvm *kvm);
199 void kvm_reload_remote_mmus(struct kvm *kvm);
201 long kvm_arch_dev_ioctl(struct file *filp,
202 unsigned int ioctl, unsigned long arg);
203 long kvm_arch_vcpu_ioctl(struct file *filp,
204 unsigned int ioctl, unsigned long arg);
205 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
206 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
208 int kvm_dev_ioctl_check_extension(long ext);
210 int kvm_get_dirty_log(struct kvm *kvm,
211 struct kvm_dirty_log *log, int *is_dirty);
212 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
213 struct kvm_dirty_log *log);
215 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
217 kvm_userspace_memory_region *mem,
219 long kvm_arch_vm_ioctl(struct file *filp,
220 unsigned int ioctl, unsigned long arg);
221 void kvm_arch_destroy_vm(struct kvm *kvm);
223 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
224 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
226 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
227 struct kvm_translation *tr);
229 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
230 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
231 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
232 struct kvm_sregs *sregs);
233 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
234 struct kvm_sregs *sregs);
235 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
236 struct kvm_debug_guest *dbg);
237 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
239 int kvm_arch_init(void *opaque);
240 void kvm_arch_exit(void);
242 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
243 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
245 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
246 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
247 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
248 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
249 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
250 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
252 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
253 void kvm_arch_hardware_enable(void *garbage);
254 void kvm_arch_hardware_disable(void *garbage);
255 int kvm_arch_hardware_setup(void);
256 void kvm_arch_hardware_unsetup(void);
257 void kvm_arch_check_processor_compat(void *rtn);
258 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
260 void kvm_free_physmem(struct kvm *kvm);
262 struct kvm *kvm_arch_create_vm(void);
263 void kvm_arch_destroy_vm(struct kvm *kvm);
265 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
266 int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
267 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
269 static inline void kvm_guest_enter(void)
271 account_system_vtime(current);
272 current->flags |= PF_VCPU;
275 static inline void kvm_guest_exit(void)
277 account_system_vtime(current);
278 current->flags &= ~PF_VCPU;
281 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
283 return slot - kvm->memslots;
286 static inline gpa_t gfn_to_gpa(gfn_t gfn)
288 return (gpa_t)gfn << PAGE_SHIFT;
291 static inline void kvm_migrate_apic_timer(struct kvm_vcpu *vcpu)
293 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
301 struct kvm_stats_debugfs_item {
304 enum kvm_stat_kind kind;
305 struct dentry *dentry;
307 extern struct kvm_stats_debugfs_item debugfs_entries[];