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_ALIAS_SLOTS 4
29 #define KVM_MEMORY_SLOTS 8
30 /* memory slots that does not exposed to userspace */
31 #define KVM_PRIVATE_MEM_SLOTS 4
33 #define KVM_PIO_PAGE_OFFSET 1
36 * vcpu->requests bit members
38 #define KVM_REQ_TLB_FLUSH 0
42 extern struct kmem_cache *kvm_vcpu_cache;
44 struct kvm_guest_debug {
50 struct kvm_vcpu_stat {
63 u32 request_irq_exits;
65 u32 host_state_reload;
69 u32 insn_emulation_fail;
73 * It would be nice to use something smarter than a linear search, TBD...
74 * Thankfully we dont expect many devices to register (famous last words :),
75 * so until then it will suffice. At least its abstracted so we can change
80 #define NR_IOBUS_DEVS 6
81 struct kvm_io_device *devs[NR_IOBUS_DEVS];
84 void kvm_io_bus_init(struct kvm_io_bus *bus);
85 void kvm_io_bus_destroy(struct kvm_io_bus *bus);
86 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
87 void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
88 struct kvm_io_device *dev);
90 #ifdef CONFIG_HAS_IOMEM
91 #define KVM_VCPU_MMIO \
93 int mmio_read_completed; \
96 unsigned char mmio_data[8]; \
100 #define KVM_VCPU_MMIO
104 #define KVM_VCPU_COMM \
106 struct preempt_notifier preempt_notifier; \
108 struct mutex mutex; \
110 struct kvm_run *run; \
112 unsigned long requests; \
113 struct kvm_guest_debug guest_debug; \
115 int guest_fpu_loaded; \
116 wait_queue_head_t wq; \
119 struct kvm_vcpu_stat stat; \
125 struct kvm_vcpu_arch arch;
128 struct kvm_mem_alias {
130 unsigned long npages;
134 struct kvm_memory_slot {
136 unsigned long npages;
139 unsigned long *dirty_bitmap;
140 unsigned long userspace_addr;
145 u32 mmu_shadow_zapped;
151 u32 remote_tlb_flush;
155 struct mutex lock; /* protects everything except vcpus */
156 struct mm_struct *mm; /* userspace tied to this vm */
158 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
160 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
161 KVM_PRIVATE_MEM_SLOTS];
163 * Hash table of struct kvm_mmu_page.
165 struct list_head active_mmu_pages;
166 unsigned int n_free_mmu_pages;
167 unsigned int n_requested_mmu_pages;
168 unsigned int n_alloc_mmu_pages;
169 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
170 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
171 struct list_head vm_list;
173 struct kvm_io_bus mmio_bus;
174 struct kvm_io_bus pio_bus;
175 struct kvm_pic *vpic;
176 struct kvm_ioapic *vioapic;
177 int round_robin_prev_vcpu;
178 unsigned int tss_addr;
179 struct page *apic_access_page;
180 struct kvm_vm_stat stat;
183 /* The guest did something we don't support. */
184 #define pr_unimpl(vcpu, fmt, ...) \
186 if (printk_ratelimit()) \
187 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
188 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
191 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
192 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
194 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
195 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
197 void vcpu_load(struct kvm_vcpu *vcpu);
198 void vcpu_put(struct kvm_vcpu *vcpu);
200 void decache_vcpus_on_cpu(int cpu);
203 int kvm_init(void *opaque, unsigned int vcpu_size,
204 struct module *module);
207 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
208 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
209 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
210 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
212 extern struct page *bad_page;
214 int is_error_page(struct page *page);
215 int kvm_is_error_hva(unsigned long addr);
216 int kvm_set_memory_region(struct kvm *kvm,
217 struct kvm_userspace_memory_region *mem,
219 int __kvm_set_memory_region(struct kvm *kvm,
220 struct kvm_userspace_memory_region *mem,
222 int kvm_arch_set_memory_region(struct kvm *kvm,
223 struct kvm_userspace_memory_region *mem,
224 struct kvm_memory_slot old,
226 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
227 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
228 void kvm_release_page_clean(struct page *page);
229 void kvm_release_page_dirty(struct page *page);
230 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
232 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
233 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
234 int offset, int len);
235 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
237 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
238 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
239 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
240 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
241 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
243 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
244 void kvm_resched(struct kvm_vcpu *vcpu);
245 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
246 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
247 void kvm_flush_remote_tlbs(struct kvm *kvm);
249 long kvm_arch_dev_ioctl(struct file *filp,
250 unsigned int ioctl, unsigned long arg);
251 long kvm_arch_vcpu_ioctl(struct file *filp,
252 unsigned int ioctl, unsigned long arg);
253 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
254 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
256 int kvm_dev_ioctl_check_extension(long ext);
258 int kvm_get_dirty_log(struct kvm *kvm,
259 struct kvm_dirty_log *log, int *is_dirty);
260 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
261 struct kvm_dirty_log *log);
263 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
265 kvm_userspace_memory_region *mem,
267 long kvm_arch_vm_ioctl(struct file *filp,
268 unsigned int ioctl, unsigned long arg);
269 void kvm_arch_destroy_vm(struct kvm *kvm);
271 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
272 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
274 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
275 struct kvm_translation *tr);
277 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
278 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
279 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
280 struct kvm_sregs *sregs);
281 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
282 struct kvm_sregs *sregs);
283 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
284 struct kvm_debug_guest *dbg);
285 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
287 int kvm_arch_init(void *opaque);
288 void kvm_arch_exit(void);
290 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
291 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
293 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
294 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
295 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
296 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
297 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
298 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
300 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
301 void kvm_arch_hardware_enable(void *garbage);
302 void kvm_arch_hardware_disable(void *garbage);
303 int kvm_arch_hardware_setup(void);
304 void kvm_arch_hardware_unsetup(void);
305 void kvm_arch_check_processor_compat(void *rtn);
306 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
308 void kvm_free_physmem(struct kvm *kvm);
310 struct kvm *kvm_arch_create_vm(void);
311 void kvm_arch_destroy_vm(struct kvm *kvm);
313 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
314 int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
316 static inline void kvm_guest_enter(void)
318 account_system_vtime(current);
319 current->flags |= PF_VCPU;
322 static inline void kvm_guest_exit(void)
324 account_system_vtime(current);
325 current->flags &= ~PF_VCPU;
328 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
330 return slot - kvm->memslots;
333 static inline gpa_t gfn_to_gpa(gfn_t gfn)
335 return (gpa_t)gfn << PAGE_SHIFT;
343 struct kvm_stats_debugfs_item {
346 enum kvm_stat_kind kind;
347 struct dentry *dentry;
349 extern struct kvm_stats_debugfs_item debugfs_entries[];