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edf88417 AK |
1 | #ifndef __KVM_HOST_H |
2 | #define __KVM_HOST_H | |
6aa8b732 AK |
3 | |
4 | /* | |
5 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
6 | * the COPYING file in the top-level directory. | |
7 | */ | |
8 | ||
9 | #include <linux/types.h> | |
e56a7a28 | 10 | #include <linux/hardirq.h> |
6aa8b732 AK |
11 | #include <linux/list.h> |
12 | #include <linux/mutex.h> | |
13 | #include <linux/spinlock.h> | |
06ff0d37 MR |
14 | #include <linux/signal.h> |
15 | #include <linux/sched.h> | |
6aa8b732 | 16 | #include <linux/mm.h> |
15ad7146 | 17 | #include <linux/preempt.h> |
d4c9ff2d | 18 | #include <linux/marker.h> |
e8edc6e0 | 19 | #include <asm/signal.h> |
6aa8b732 | 20 | |
6aa8b732 | 21 | #include <linux/kvm.h> |
102d8325 | 22 | #include <linux/kvm_para.h> |
6aa8b732 | 23 | |
edf88417 | 24 | #include <linux/kvm_types.h> |
d77a39d9 | 25 | |
edf88417 | 26 | #include <asm/kvm_host.h> |
d657a98e | 27 | |
d9e368d6 AK |
28 | /* |
29 | * vcpu->requests bit members | |
30 | */ | |
3176bc3e | 31 | #define KVM_REQ_TLB_FLUSH 0 |
2f52d58c | 32 | #define KVM_REQ_MIGRATE_TIMER 1 |
b209749f | 33 | #define KVM_REQ_REPORT_TPR_ACCESS 2 |
2e53d63a | 34 | #define KVM_REQ_MMU_RELOAD 3 |
71c4dfaf | 35 | #define KVM_REQ_TRIPLE_FAULT 4 |
06e05645 | 36 | #define KVM_REQ_PENDING_TIMER 5 |
d7690175 | 37 | #define KVM_REQ_UNHALT 6 |
6aa8b732 | 38 | |
6aa8b732 | 39 | struct kvm_vcpu; |
c16f862d | 40 | extern struct kmem_cache *kvm_vcpu_cache; |
6aa8b732 | 41 | |
2eeb2e94 GH |
42 | /* |
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 | |
46 | * in one place. | |
47 | */ | |
48 | struct kvm_io_bus { | |
49 | int dev_count; | |
50 | #define NR_IOBUS_DEVS 6 | |
51 | struct kvm_io_device *devs[NR_IOBUS_DEVS]; | |
52 | }; | |
53 | ||
54 | void kvm_io_bus_init(struct kvm_io_bus *bus); | |
55 | void kvm_io_bus_destroy(struct kvm_io_bus *bus); | |
92760499 LV |
56 | struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, |
57 | gpa_t addr, int len, int is_write); | |
2eeb2e94 GH |
58 | void kvm_io_bus_register_dev(struct kvm_io_bus *bus, |
59 | struct kvm_io_device *dev); | |
60 | ||
d17fbbf7 ZX |
61 | struct kvm_vcpu { |
62 | struct kvm *kvm; | |
31bb117e | 63 | #ifdef CONFIG_PREEMPT_NOTIFIERS |
d17fbbf7 | 64 | struct preempt_notifier preempt_notifier; |
31bb117e | 65 | #endif |
d17fbbf7 ZX |
66 | int vcpu_id; |
67 | struct mutex mutex; | |
68 | int cpu; | |
69 | struct kvm_run *run; | |
70 | int guest_mode; | |
71 | unsigned long requests; | |
72 | struct kvm_guest_debug guest_debug; | |
73 | int fpu_active; | |
74 | int guest_fpu_loaded; | |
75 | wait_queue_head_t wq; | |
76 | int sigset_active; | |
77 | sigset_t sigset; | |
78 | struct kvm_vcpu_stat stat; | |
79 | ||
34c16eec | 80 | #ifdef CONFIG_HAS_IOMEM |
d17fbbf7 ZX |
81 | int mmio_needed; |
82 | int mmio_read_completed; | |
83 | int mmio_is_write; | |
84 | int mmio_size; | |
85 | unsigned char mmio_data[8]; | |
6aa8b732 | 86 | gpa_t mmio_phys_addr; |
34c16eec | 87 | #endif |
1165f5fe | 88 | |
d657a98e ZX |
89 | struct kvm_vcpu_arch arch; |
90 | }; | |
91 | ||
6aa8b732 AK |
92 | struct kvm_memory_slot { |
93 | gfn_t base_gfn; | |
94 | unsigned long npages; | |
95 | unsigned long flags; | |
290fc38d | 96 | unsigned long *rmap; |
6aa8b732 | 97 | unsigned long *dirty_bitmap; |
05da4558 MT |
98 | struct { |
99 | unsigned long rmap_pde; | |
100 | int write_count; | |
101 | } *lpage_info; | |
8a7ae055 | 102 | unsigned long userspace_addr; |
80b14b5b | 103 | int user_alloc; |
6aa8b732 AK |
104 | }; |
105 | ||
106 | struct kvm { | |
aaee2c94 MT |
107 | struct mutex lock; /* protects the vcpus array and APIC accesses */ |
108 | spinlock_t mmu_lock; | |
72dc67a6 | 109 | struct rw_semaphore slots_lock; |
6d4e4c4f | 110 | struct mm_struct *mm; /* userspace tied to this vm */ |
6aa8b732 | 111 | int nmemslots; |
e0d62c7f IE |
112 | struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS + |
113 | KVM_PRIVATE_MEM_SLOTS]; | |
fb3f0f51 | 114 | struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; |
133de902 | 115 | struct list_head vm_list; |
2eeb2e94 | 116 | struct kvm_io_bus mmio_bus; |
74906345 | 117 | struct kvm_io_bus pio_bus; |
ba1389b7 | 118 | struct kvm_vm_stat stat; |
d69fb81f | 119 | struct kvm_arch arch; |
d39f13b0 | 120 | atomic_t users_count; |
5f94c174 LV |
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; | |
124 | #endif | |
e930bffe AA |
125 | |
126 | #ifdef KVM_ARCH_WANT_MMU_NOTIFIER | |
127 | struct mmu_notifier mmu_notifier; | |
128 | unsigned long mmu_notifier_seq; | |
129 | long mmu_notifier_count; | |
130 | #endif | |
6aa8b732 AK |
131 | }; |
132 | ||
f0242478 RR |
133 | /* The guest did something we don't support. */ |
134 | #define pr_unimpl(vcpu, fmt, ...) \ | |
135 | do { \ | |
136 | if (printk_ratelimit()) \ | |
137 | printk(KERN_ERR "kvm: %i: cpu%i " fmt, \ | |
138 | current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \ | |
d77c26fc | 139 | } while (0) |
f0242478 | 140 | |
6aa8b732 AK |
141 | #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt) |
142 | #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt) | |
143 | ||
fb3f0f51 RR |
144 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); |
145 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); | |
146 | ||
313a3dc7 CO |
147 | void vcpu_load(struct kvm_vcpu *vcpu); |
148 | void vcpu_put(struct kvm_vcpu *vcpu); | |
149 | ||
f8c16bba | 150 | int kvm_init(void *opaque, unsigned int vcpu_size, |
c16f862d | 151 | struct module *module); |
cb498ea2 | 152 | void kvm_exit(void); |
6aa8b732 | 153 | |
d39f13b0 IE |
154 | void kvm_get_kvm(struct kvm *kvm); |
155 | void kvm_put_kvm(struct kvm *kvm); | |
156 | ||
6aa8b732 AK |
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; } | |
039576c0 | 160 | struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva); |
6aa8b732 | 161 | |
cea7bb21 | 162 | extern struct page *bad_page; |
35149e21 | 163 | extern pfn_t bad_pfn; |
6aa8b732 | 164 | |
cea7bb21 | 165 | int is_error_page(struct page *page); |
35149e21 | 166 | int is_error_pfn(pfn_t pfn); |
f9d46eb0 | 167 | int kvm_is_error_hva(unsigned long addr); |
210c7c4d IE |
168 | int kvm_set_memory_region(struct kvm *kvm, |
169 | struct kvm_userspace_memory_region *mem, | |
170 | int user_alloc); | |
f78e0e2e SY |
171 | int __kvm_set_memory_region(struct kvm *kvm, |
172 | struct kvm_userspace_memory_region *mem, | |
173 | int user_alloc); | |
0de10343 ZX |
174 | int kvm_arch_set_memory_region(struct kvm *kvm, |
175 | struct kvm_userspace_memory_region *mem, | |
176 | struct kvm_memory_slot old, | |
177 | int user_alloc); | |
34d4cb8f | 178 | void kvm_arch_flush_shadow(struct kvm *kvm); |
290fc38d | 179 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn); |
954bbbc2 | 180 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); |
05da4558 | 181 | unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); |
b4231d61 IE |
182 | void kvm_release_page_clean(struct page *page); |
183 | void kvm_release_page_dirty(struct page *page); | |
35149e21 AL |
184 | void kvm_set_page_dirty(struct page *page); |
185 | void kvm_set_page_accessed(struct page *page); | |
186 | ||
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); | |
193 | ||
195aefde IE |
194 | int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, |
195 | int len); | |
7ec54588 MT |
196 | int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, |
197 | unsigned long len); | |
195aefde IE |
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, | |
202 | unsigned long len); | |
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); | |
6aa8b732 | 205 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); |
e0d62c7f | 206 | int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); |
6aa8b732 AK |
207 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn); |
208 | ||
8776e519 | 209 | void kvm_vcpu_block(struct kvm_vcpu *vcpu); |
6aa8b732 | 210 | void kvm_resched(struct kvm_vcpu *vcpu); |
7702fd1f AK |
211 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); |
212 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); | |
d9e368d6 | 213 | void kvm_flush_remote_tlbs(struct kvm *kvm); |
2e53d63a | 214 | void kvm_reload_remote_mmus(struct kvm *kvm); |
6aa8b732 | 215 | |
043405e1 CO |
216 | long kvm_arch_dev_ioctl(struct file *filp, |
217 | unsigned int ioctl, unsigned long arg); | |
313a3dc7 CO |
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); | |
018d00d2 ZX |
222 | |
223 | int kvm_dev_ioctl_check_extension(long ext); | |
224 | ||
5bb064dc ZX |
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); | |
229 | ||
1fe779f8 CO |
230 | int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
231 | struct | |
232 | kvm_userspace_memory_region *mem, | |
233 | int user_alloc); | |
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); | |
313a3dc7 | 237 | |
d0752060 HB |
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); | |
240 | ||
8b006791 ZX |
241 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
242 | struct kvm_translation *tr); | |
243 | ||
b6c7a5dc HB |
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); | |
62d9f0db MT |
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); | |
b6c7a5dc HB |
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); | |
257 | ||
f8c16bba ZX |
258 | int kvm_arch_init(void *opaque); |
259 | void kvm_arch_exit(void); | |
043405e1 | 260 | |
e9b11c17 ZX |
261 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); |
262 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); | |
263 | ||
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); | |
26e5215f | 268 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); |
d40ccc62 | 269 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); |
e9b11c17 ZX |
270 | |
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); | |
1d737c8a | 277 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); |
e9b11c17 | 278 | |
d19a9cd2 ZX |
279 | void kvm_free_physmem(struct kvm *kvm); |
280 | ||
281 | struct kvm *kvm_arch_create_vm(void); | |
282 | void kvm_arch_destroy_vm(struct kvm *kvm); | |
e9b11c17 | 283 | |
682c59a3 ZX |
284 | int kvm_cpu_get_interrupt(struct kvm_vcpu *v); |
285 | int kvm_cpu_has_interrupt(struct kvm_vcpu *v); | |
3d80840d | 286 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); |
5736199a | 287 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu); |
682c59a3 | 288 | |
d172fcd3 LV |
289 | static inline void kvm_guest_enter(void) |
290 | { | |
e56a7a28 | 291 | account_system_vtime(current); |
d172fcd3 LV |
292 | current->flags |= PF_VCPU; |
293 | } | |
294 | ||
295 | static inline void kvm_guest_exit(void) | |
296 | { | |
e56a7a28 | 297 | account_system_vtime(current); |
d172fcd3 LV |
298 | current->flags &= ~PF_VCPU; |
299 | } | |
300 | ||
6aa8b732 AK |
301 | static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot) |
302 | { | |
303 | return slot - kvm->memslots; | |
304 | } | |
305 | ||
1755fbcc AK |
306 | static inline gpa_t gfn_to_gpa(gfn_t gfn) |
307 | { | |
308 | return (gpa_t)gfn << PAGE_SHIFT; | |
309 | } | |
6aa8b732 | 310 | |
2f599714 | 311 | static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) |
2f52d58c AK |
312 | { |
313 | set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); | |
314 | } | |
315 | ||
ba1389b7 AK |
316 | enum kvm_stat_kind { |
317 | KVM_STAT_VM, | |
318 | KVM_STAT_VCPU, | |
319 | }; | |
320 | ||
417bc304 HB |
321 | struct kvm_stats_debugfs_item { |
322 | const char *name; | |
323 | int offset; | |
ba1389b7 | 324 | enum kvm_stat_kind kind; |
417bc304 HB |
325 | struct dentry *dentry; |
326 | }; | |
327 | extern struct kvm_stats_debugfs_item debugfs_entries[]; | |
76f7c879 | 328 | extern struct dentry *kvm_debugfs_dir; |
d4c9ff2d | 329 | |
d98e6346 HB |
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) | |
348 | ||
d4c9ff2d FEL |
349 | #ifdef CONFIG_KVM_TRACE |
350 | int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg); | |
351 | void kvm_trace_cleanup(void); | |
352 | #else | |
353 | static inline | |
354 | int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg) | |
355 | { | |
356 | return -EINVAL; | |
357 | } | |
358 | #define kvm_trace_cleanup() ((void)0) | |
359 | #endif | |
417bc304 | 360 | |
e930bffe AA |
361 | #ifdef KVM_ARCH_WANT_MMU_NOTIFIER |
362 | static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq) | |
363 | { | |
364 | if (unlikely(vcpu->kvm->mmu_notifier_count)) | |
365 | return 1; | |
366 | /* | |
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. | |
372 | */ | |
373 | if (vcpu->kvm->mmu_notifier_seq != mmu_seq) | |
374 | return 1; | |
375 | return 0; | |
376 | } | |
377 | #endif | |
378 | ||
6aa8b732 | 379 | #endif |