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
37 #define KVM_REQ_UNHALT 6
40 extern struct kmem_cache *kvm_vcpu_cache;
43 * It would be nice to use something smarter than a linear search, TBD...
44 * Thankfully we dont expect many devices to register (famous last words :),
45 * so until then it will suffice. At least its abstracted so we can change
50 #define NR_IOBUS_DEVS 6
51 struct kvm_io_device *devs[NR_IOBUS_DEVS];
54 void kvm_io_bus_init(struct kvm_io_bus *bus);
55 void kvm_io_bus_destroy(struct kvm_io_bus *bus);
56 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus,
57 gpa_t addr, int len, int is_write);
58 void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
59 struct kvm_io_device *dev);
63 #ifdef CONFIG_PREEMPT_NOTIFIERS
64 struct preempt_notifier preempt_notifier;
71 unsigned long requests;
72 struct kvm_guest_debug guest_debug;
78 struct kvm_vcpu_stat stat;
80 #ifdef CONFIG_HAS_IOMEM
82 int mmio_read_completed;
85 unsigned char mmio_data[8];
89 struct kvm_vcpu_arch arch;
92 struct kvm_memory_slot {
97 unsigned long *dirty_bitmap;
99 unsigned long rmap_pde;
102 unsigned long userspace_addr;
107 struct mutex lock; /* protects the vcpus array and APIC accesses */
109 struct rw_semaphore slots_lock;
110 struct mm_struct *mm; /* userspace tied to this vm */
112 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
113 KVM_PRIVATE_MEM_SLOTS];
114 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
115 struct list_head vm_list;
116 struct kvm_io_bus mmio_bus;
117 struct kvm_io_bus pio_bus;
118 struct kvm_vm_stat stat;
119 struct kvm_arch arch;
120 atomic_t users_count;
121 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
122 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
123 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
126 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
127 struct mmu_notifier mmu_notifier;
128 unsigned long mmu_notifier_seq;
129 long mmu_notifier_count;
133 /* The guest did something we don't support. */
134 #define pr_unimpl(vcpu, fmt, ...) \
136 if (printk_ratelimit()) \
137 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
138 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
141 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
142 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
144 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
145 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
147 void vcpu_load(struct kvm_vcpu *vcpu);
148 void vcpu_put(struct kvm_vcpu *vcpu);
150 int kvm_init(void *opaque, unsigned int vcpu_size,
151 struct module *module);
154 void kvm_get_kvm(struct kvm *kvm);
155 void kvm_put_kvm(struct kvm *kvm);
157 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
158 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
159 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
160 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
162 extern struct page *bad_page;
163 extern pfn_t bad_pfn;
165 int is_error_page(struct page *page);
166 int is_error_pfn(pfn_t pfn);
167 int kvm_is_error_hva(unsigned long addr);
168 int kvm_set_memory_region(struct kvm *kvm,
169 struct kvm_userspace_memory_region *mem,
171 int __kvm_set_memory_region(struct kvm *kvm,
172 struct kvm_userspace_memory_region *mem,
174 int kvm_arch_set_memory_region(struct kvm *kvm,
175 struct kvm_userspace_memory_region *mem,
176 struct kvm_memory_slot old,
178 void kvm_arch_flush_shadow(struct kvm *kvm);
179 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
180 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
181 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
182 void kvm_release_page_clean(struct page *page);
183 void kvm_release_page_dirty(struct page *page);
184 void kvm_set_page_dirty(struct page *page);
185 void kvm_set_page_accessed(struct page *page);
187 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
188 void kvm_release_pfn_dirty(pfn_t);
189 void kvm_release_pfn_clean(pfn_t pfn);
190 void kvm_set_pfn_dirty(pfn_t pfn);
191 void kvm_set_pfn_accessed(pfn_t pfn);
192 void kvm_get_pfn(pfn_t pfn);
194 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
196 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
198 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
199 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
200 int offset, int len);
201 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
203 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
204 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
205 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
206 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
207 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
209 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
210 void kvm_resched(struct kvm_vcpu *vcpu);
211 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
212 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
213 void kvm_flush_remote_tlbs(struct kvm *kvm);
214 void kvm_reload_remote_mmus(struct kvm *kvm);
216 long kvm_arch_dev_ioctl(struct file *filp,
217 unsigned int ioctl, unsigned long arg);
218 long kvm_arch_vcpu_ioctl(struct file *filp,
219 unsigned int ioctl, unsigned long arg);
220 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
221 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
223 int kvm_dev_ioctl_check_extension(long ext);
225 int kvm_get_dirty_log(struct kvm *kvm,
226 struct kvm_dirty_log *log, int *is_dirty);
227 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
228 struct kvm_dirty_log *log);
230 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
232 kvm_userspace_memory_region *mem,
234 long kvm_arch_vm_ioctl(struct file *filp,
235 unsigned int ioctl, unsigned long arg);
236 void kvm_arch_destroy_vm(struct kvm *kvm);
238 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
239 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
241 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
242 struct kvm_translation *tr);
244 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
245 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
246 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
247 struct kvm_sregs *sregs);
248 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
249 struct kvm_sregs *sregs);
250 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
251 struct kvm_mp_state *mp_state);
252 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
253 struct kvm_mp_state *mp_state);
254 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
255 struct kvm_debug_guest *dbg);
256 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
258 int kvm_arch_init(void *opaque);
259 void kvm_arch_exit(void);
261 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
262 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
264 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
265 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
266 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
267 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
268 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
269 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
271 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
272 void kvm_arch_hardware_enable(void *garbage);
273 void kvm_arch_hardware_disable(void *garbage);
274 int kvm_arch_hardware_setup(void);
275 void kvm_arch_hardware_unsetup(void);
276 void kvm_arch_check_processor_compat(void *rtn);
277 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
279 void kvm_free_physmem(struct kvm *kvm);
281 struct kvm *kvm_arch_create_vm(void);
282 void kvm_arch_destroy_vm(struct kvm *kvm);
284 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
285 int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
286 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
287 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
289 static inline void kvm_guest_enter(void)
291 account_system_vtime(current);
292 current->flags |= PF_VCPU;
295 static inline void kvm_guest_exit(void)
297 account_system_vtime(current);
298 current->flags &= ~PF_VCPU;
301 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
303 return slot - kvm->memslots;
306 static inline gpa_t gfn_to_gpa(gfn_t gfn)
308 return (gpa_t)gfn << PAGE_SHIFT;
311 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
313 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
321 struct kvm_stats_debugfs_item {
324 enum kvm_stat_kind kind;
325 struct dentry *dentry;
327 extern struct kvm_stats_debugfs_item debugfs_entries[];
328 extern struct dentry *kvm_debugfs_dir;
330 #define KVMTRACE_5D(evt, vcpu, d1, d2, d3, d4, d5, name) \
331 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
332 vcpu, 5, d1, d2, d3, d4, d5)
333 #define KVMTRACE_4D(evt, vcpu, d1, d2, d3, d4, name) \
334 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
335 vcpu, 4, d1, d2, d3, d4, 0)
336 #define KVMTRACE_3D(evt, vcpu, d1, d2, d3, name) \
337 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
338 vcpu, 3, d1, d2, d3, 0, 0)
339 #define KVMTRACE_2D(evt, vcpu, d1, d2, name) \
340 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
341 vcpu, 2, d1, d2, 0, 0, 0)
342 #define KVMTRACE_1D(evt, vcpu, d1, name) \
343 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
344 vcpu, 1, d1, 0, 0, 0, 0)
345 #define KVMTRACE_0D(evt, vcpu, name) \
346 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
347 vcpu, 0, 0, 0, 0, 0, 0)
349 #ifdef CONFIG_KVM_TRACE
350 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg);
351 void kvm_trace_cleanup(void);
354 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg)
358 #define kvm_trace_cleanup() ((void)0)
361 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
362 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
364 if (unlikely(vcpu->kvm->mmu_notifier_count))
367 * Both reads happen under the mmu_lock and both values are
368 * modified under mmu_lock, so there's no need of smb_rmb()
369 * here in between, otherwise mmu_notifier_count should be
370 * read before mmu_notifier_seq, see
371 * mmu_notifier_invalidate_range_end write side.
373 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)