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Commit | Line | Data |
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6aa8b732 AK |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * This module enables machines with Intel VT-x extensions to run virtual | |
5 | * machines without emulation or binary translation. | |
6 | * | |
7 | * Copyright (C) 2006 Qumranet, Inc. | |
8 | * | |
9 | * Authors: | |
10 | * Avi Kivity <avi@qumranet.com> | |
11 | * Yaniv Kamay <yaniv@qumranet.com> | |
12 | * | |
13 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
14 | * the COPYING file in the top-level directory. | |
15 | * | |
16 | */ | |
17 | ||
18 | #include "kvm.h" | |
043405e1 | 19 | #include "x86.h" |
85f455f7 | 20 | #include "irq.h" |
6aa8b732 AK |
21 | |
22 | #include <linux/kvm.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/errno.h> | |
6aa8b732 AK |
25 | #include <linux/percpu.h> |
26 | #include <linux/gfp.h> | |
6aa8b732 AK |
27 | #include <linux/mm.h> |
28 | #include <linux/miscdevice.h> | |
29 | #include <linux/vmalloc.h> | |
6aa8b732 | 30 | #include <linux/reboot.h> |
6aa8b732 AK |
31 | #include <linux/debugfs.h> |
32 | #include <linux/highmem.h> | |
33 | #include <linux/file.h> | |
59ae6c6b | 34 | #include <linux/sysdev.h> |
774c47f1 | 35 | #include <linux/cpu.h> |
e8edc6e0 | 36 | #include <linux/sched.h> |
d9e368d6 AK |
37 | #include <linux/cpumask.h> |
38 | #include <linux/smp.h> | |
d6d28168 | 39 | #include <linux/anon_inodes.h> |
04d2cc77 | 40 | #include <linux/profile.h> |
7aa81cc0 | 41 | #include <linux/kvm_para.h> |
6fc138d2 | 42 | #include <linux/pagemap.h> |
8d4e1288 | 43 | #include <linux/mman.h> |
6aa8b732 | 44 | |
e495606d | 45 | #include <asm/processor.h> |
e495606d AK |
46 | #include <asm/io.h> |
47 | #include <asm/uaccess.h> | |
48 | #include <asm/desc.h> | |
6aa8b732 AK |
49 | |
50 | MODULE_AUTHOR("Qumranet"); | |
51 | MODULE_LICENSE("GPL"); | |
52 | ||
e9b11c17 ZX |
53 | DEFINE_SPINLOCK(kvm_lock); |
54 | LIST_HEAD(vm_list); | |
133de902 | 55 | |
1b6c0168 AK |
56 | static cpumask_t cpus_hardware_enabled; |
57 | ||
c16f862d RR |
58 | struct kmem_cache *kvm_vcpu_cache; |
59 | EXPORT_SYMBOL_GPL(kvm_vcpu_cache); | |
1165f5fe | 60 | |
15ad7146 AK |
61 | static __read_mostly struct preempt_ops kvm_preempt_ops; |
62 | ||
6aa8b732 AK |
63 | static struct dentry *debugfs_dir; |
64 | ||
bccf2150 AK |
65 | static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, |
66 | unsigned long arg); | |
67 | ||
5aacf0ca JM |
68 | static inline int valid_vcpu(int n) |
69 | { | |
70 | return likely(n >= 0 && n < KVM_MAX_VCPUS); | |
71 | } | |
72 | ||
bccf2150 AK |
73 | /* |
74 | * Switches to specified vcpu, until a matching vcpu_put() | |
75 | */ | |
313a3dc7 | 76 | void vcpu_load(struct kvm_vcpu *vcpu) |
6aa8b732 | 77 | { |
15ad7146 AK |
78 | int cpu; |
79 | ||
bccf2150 | 80 | mutex_lock(&vcpu->mutex); |
15ad7146 AK |
81 | cpu = get_cpu(); |
82 | preempt_notifier_register(&vcpu->preempt_notifier); | |
313a3dc7 | 83 | kvm_arch_vcpu_load(vcpu, cpu); |
15ad7146 | 84 | put_cpu(); |
6aa8b732 AK |
85 | } |
86 | ||
313a3dc7 | 87 | void vcpu_put(struct kvm_vcpu *vcpu) |
6aa8b732 | 88 | { |
15ad7146 | 89 | preempt_disable(); |
313a3dc7 | 90 | kvm_arch_vcpu_put(vcpu); |
15ad7146 AK |
91 | preempt_notifier_unregister(&vcpu->preempt_notifier); |
92 | preempt_enable(); | |
6aa8b732 AK |
93 | mutex_unlock(&vcpu->mutex); |
94 | } | |
95 | ||
d9e368d6 AK |
96 | static void ack_flush(void *_completed) |
97 | { | |
d9e368d6 AK |
98 | } |
99 | ||
100 | void kvm_flush_remote_tlbs(struct kvm *kvm) | |
101 | { | |
49d3bd7e | 102 | int i, cpu; |
d9e368d6 AK |
103 | cpumask_t cpus; |
104 | struct kvm_vcpu *vcpu; | |
d9e368d6 | 105 | |
d9e368d6 | 106 | cpus_clear(cpus); |
fb3f0f51 RR |
107 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
108 | vcpu = kvm->vcpus[i]; | |
109 | if (!vcpu) | |
110 | continue; | |
3176bc3e | 111 | if (test_and_set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests)) |
d9e368d6 AK |
112 | continue; |
113 | cpu = vcpu->cpu; | |
114 | if (cpu != -1 && cpu != raw_smp_processor_id()) | |
49d3bd7e | 115 | cpu_set(cpu, cpus); |
d9e368d6 | 116 | } |
49d3bd7e | 117 | smp_call_function_mask(cpus, ack_flush, NULL, 1); |
d9e368d6 AK |
118 | } |
119 | ||
fb3f0f51 RR |
120 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) |
121 | { | |
122 | struct page *page; | |
123 | int r; | |
124 | ||
125 | mutex_init(&vcpu->mutex); | |
126 | vcpu->cpu = -1; | |
fb3f0f51 RR |
127 | vcpu->kvm = kvm; |
128 | vcpu->vcpu_id = id; | |
b6958ce4 | 129 | init_waitqueue_head(&vcpu->wq); |
fb3f0f51 RR |
130 | |
131 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
132 | if (!page) { | |
133 | r = -ENOMEM; | |
134 | goto fail; | |
135 | } | |
136 | vcpu->run = page_address(page); | |
137 | ||
e9b11c17 | 138 | r = kvm_arch_vcpu_init(vcpu); |
fb3f0f51 | 139 | if (r < 0) |
e9b11c17 | 140 | goto fail_free_run; |
fb3f0f51 RR |
141 | return 0; |
142 | ||
fb3f0f51 RR |
143 | fail_free_run: |
144 | free_page((unsigned long)vcpu->run); | |
145 | fail: | |
76fafa5e | 146 | return r; |
fb3f0f51 RR |
147 | } |
148 | EXPORT_SYMBOL_GPL(kvm_vcpu_init); | |
149 | ||
150 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) | |
151 | { | |
e9b11c17 | 152 | kvm_arch_vcpu_uninit(vcpu); |
fb3f0f51 RR |
153 | free_page((unsigned long)vcpu->run); |
154 | } | |
155 | EXPORT_SYMBOL_GPL(kvm_vcpu_uninit); | |
156 | ||
f17abe9a | 157 | static struct kvm *kvm_create_vm(void) |
6aa8b732 AK |
158 | { |
159 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
6aa8b732 AK |
160 | |
161 | if (!kvm) | |
f17abe9a | 162 | return ERR_PTR(-ENOMEM); |
6aa8b732 | 163 | |
74906345 | 164 | kvm_io_bus_init(&kvm->pio_bus); |
11ec2804 | 165 | mutex_init(&kvm->lock); |
6aa8b732 | 166 | INIT_LIST_HEAD(&kvm->active_mmu_pages); |
2eeb2e94 | 167 | kvm_io_bus_init(&kvm->mmio_bus); |
5e58cfe4 RR |
168 | spin_lock(&kvm_lock); |
169 | list_add(&kvm->vm_list, &vm_list); | |
170 | spin_unlock(&kvm_lock); | |
f17abe9a AK |
171 | return kvm; |
172 | } | |
173 | ||
6aa8b732 AK |
174 | /* |
175 | * Free any memory in @free but not in @dont. | |
176 | */ | |
177 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, | |
178 | struct kvm_memory_slot *dont) | |
179 | { | |
290fc38d IE |
180 | if (!dont || free->rmap != dont->rmap) |
181 | vfree(free->rmap); | |
6aa8b732 AK |
182 | |
183 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) | |
184 | vfree(free->dirty_bitmap); | |
185 | ||
6aa8b732 | 186 | free->npages = 0; |
8b6d44c7 | 187 | free->dirty_bitmap = NULL; |
8d4e1288 | 188 | free->rmap = NULL; |
6aa8b732 AK |
189 | } |
190 | ||
191 | static void kvm_free_physmem(struct kvm *kvm) | |
192 | { | |
193 | int i; | |
194 | ||
195 | for (i = 0; i < kvm->nmemslots; ++i) | |
8b6d44c7 | 196 | kvm_free_physmem_slot(&kvm->memslots[i], NULL); |
6aa8b732 AK |
197 | } |
198 | ||
7b53aa56 AK |
199 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) |
200 | { | |
7b53aa56 AK |
201 | vcpu_load(vcpu); |
202 | kvm_mmu_unload(vcpu); | |
203 | vcpu_put(vcpu); | |
204 | } | |
205 | ||
6aa8b732 AK |
206 | static void kvm_free_vcpus(struct kvm *kvm) |
207 | { | |
208 | unsigned int i; | |
209 | ||
7b53aa56 AK |
210 | /* |
211 | * Unpin any mmu pages first. | |
212 | */ | |
213 | for (i = 0; i < KVM_MAX_VCPUS; ++i) | |
fb3f0f51 RR |
214 | if (kvm->vcpus[i]) |
215 | kvm_unload_vcpu_mmu(kvm->vcpus[i]); | |
216 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
217 | if (kvm->vcpus[i]) { | |
e9b11c17 | 218 | kvm_arch_vcpu_free(kvm->vcpus[i]); |
fb3f0f51 RR |
219 | kvm->vcpus[i] = NULL; |
220 | } | |
221 | } | |
222 | ||
6aa8b732 AK |
223 | } |
224 | ||
f17abe9a AK |
225 | static void kvm_destroy_vm(struct kvm *kvm) |
226 | { | |
133de902 AK |
227 | spin_lock(&kvm_lock); |
228 | list_del(&kvm->vm_list); | |
229 | spin_unlock(&kvm_lock); | |
74906345 | 230 | kvm_io_bus_destroy(&kvm->pio_bus); |
2eeb2e94 | 231 | kvm_io_bus_destroy(&kvm->mmio_bus); |
85f455f7 | 232 | kfree(kvm->vpic); |
1fd4f2a5 | 233 | kfree(kvm->vioapic); |
6aa8b732 AK |
234 | kvm_free_vcpus(kvm); |
235 | kvm_free_physmem(kvm); | |
236 | kfree(kvm); | |
f17abe9a AK |
237 | } |
238 | ||
239 | static int kvm_vm_release(struct inode *inode, struct file *filp) | |
240 | { | |
241 | struct kvm *kvm = filp->private_data; | |
242 | ||
243 | kvm_destroy_vm(kvm); | |
6aa8b732 AK |
244 | return 0; |
245 | } | |
246 | ||
6aa8b732 AK |
247 | /* |
248 | * Allocate some memory and give it an address in the guest physical address | |
249 | * space. | |
250 | * | |
251 | * Discontiguous memory is allowed, mostly for framebuffers. | |
f78e0e2e SY |
252 | * |
253 | * Must be called holding kvm->lock. | |
6aa8b732 | 254 | */ |
f78e0e2e SY |
255 | int __kvm_set_memory_region(struct kvm *kvm, |
256 | struct kvm_userspace_memory_region *mem, | |
257 | int user_alloc) | |
6aa8b732 AK |
258 | { |
259 | int r; | |
260 | gfn_t base_gfn; | |
261 | unsigned long npages; | |
262 | unsigned long i; | |
263 | struct kvm_memory_slot *memslot; | |
264 | struct kvm_memory_slot old, new; | |
6aa8b732 AK |
265 | |
266 | r = -EINVAL; | |
267 | /* General sanity checks */ | |
268 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
269 | goto out; | |
270 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) | |
271 | goto out; | |
e0d62c7f | 272 | if (mem->slot >= KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS) |
6aa8b732 AK |
273 | goto out; |
274 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) | |
275 | goto out; | |
276 | ||
277 | memslot = &kvm->memslots[mem->slot]; | |
278 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; | |
279 | npages = mem->memory_size >> PAGE_SHIFT; | |
280 | ||
281 | if (!npages) | |
282 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; | |
283 | ||
6aa8b732 AK |
284 | new = old = *memslot; |
285 | ||
286 | new.base_gfn = base_gfn; | |
287 | new.npages = npages; | |
288 | new.flags = mem->flags; | |
289 | ||
290 | /* Disallow changing a memory slot's size. */ | |
291 | r = -EINVAL; | |
292 | if (npages && old.npages && npages != old.npages) | |
f78e0e2e | 293 | goto out_free; |
6aa8b732 AK |
294 | |
295 | /* Check for overlaps */ | |
296 | r = -EEXIST; | |
297 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
298 | struct kvm_memory_slot *s = &kvm->memslots[i]; | |
299 | ||
300 | if (s == memslot) | |
301 | continue; | |
302 | if (!((base_gfn + npages <= s->base_gfn) || | |
303 | (base_gfn >= s->base_gfn + s->npages))) | |
f78e0e2e | 304 | goto out_free; |
6aa8b732 | 305 | } |
6aa8b732 | 306 | |
6aa8b732 AK |
307 | /* Free page dirty bitmap if unneeded */ |
308 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8b6d44c7 | 309 | new.dirty_bitmap = NULL; |
6aa8b732 AK |
310 | |
311 | r = -ENOMEM; | |
312 | ||
313 | /* Allocate if a slot is being created */ | |
8d4e1288 | 314 | if (npages && !new.rmap) { |
d77c26fc | 315 | new.rmap = vmalloc(npages * sizeof(struct page *)); |
290fc38d IE |
316 | |
317 | if (!new.rmap) | |
f78e0e2e | 318 | goto out_free; |
290fc38d | 319 | |
290fc38d | 320 | memset(new.rmap, 0, npages * sizeof(*new.rmap)); |
8d4e1288 | 321 | |
80b14b5b | 322 | new.user_alloc = user_alloc; |
8d4e1288 | 323 | if (user_alloc) |
8a7ae055 | 324 | new.userspace_addr = mem->userspace_addr; |
8d4e1288 AL |
325 | else { |
326 | down_write(¤t->mm->mmap_sem); | |
327 | new.userspace_addr = do_mmap(NULL, 0, | |
328 | npages * PAGE_SIZE, | |
329 | PROT_READ | PROT_WRITE, | |
330 | MAP_SHARED | MAP_ANONYMOUS, | |
331 | 0); | |
332 | up_write(¤t->mm->mmap_sem); | |
333 | ||
334 | if (IS_ERR((void *)new.userspace_addr)) | |
f78e0e2e | 335 | goto out_free; |
6aa8b732 | 336 | } |
80b14b5b IE |
337 | } else { |
338 | if (!old.user_alloc && old.rmap) { | |
339 | int ret; | |
340 | ||
341 | down_write(¤t->mm->mmap_sem); | |
342 | ret = do_munmap(current->mm, old.userspace_addr, | |
343 | old.npages * PAGE_SIZE); | |
344 | up_write(¤t->mm->mmap_sem); | |
345 | if (ret < 0) | |
346 | printk(KERN_WARNING | |
347 | "kvm_vm_ioctl_set_memory_region: " | |
348 | "failed to munmap memory\n"); | |
349 | } | |
6aa8b732 AK |
350 | } |
351 | ||
352 | /* Allocate page dirty bitmap if needed */ | |
353 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { | |
354 | unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8; | |
355 | ||
356 | new.dirty_bitmap = vmalloc(dirty_bytes); | |
357 | if (!new.dirty_bitmap) | |
f78e0e2e | 358 | goto out_free; |
6aa8b732 AK |
359 | memset(new.dirty_bitmap, 0, dirty_bytes); |
360 | } | |
361 | ||
6aa8b732 AK |
362 | if (mem->slot >= kvm->nmemslots) |
363 | kvm->nmemslots = mem->slot + 1; | |
364 | ||
82ce2c96 IE |
365 | if (!kvm->n_requested_mmu_pages) { |
366 | unsigned int n_pages; | |
367 | ||
368 | if (npages) { | |
369 | n_pages = npages * KVM_PERMILLE_MMU_PAGES / 1000; | |
370 | kvm_mmu_change_mmu_pages(kvm, kvm->n_alloc_mmu_pages + | |
371 | n_pages); | |
372 | } else { | |
373 | unsigned int nr_mmu_pages; | |
374 | ||
375 | n_pages = old.npages * KVM_PERMILLE_MMU_PAGES / 1000; | |
376 | nr_mmu_pages = kvm->n_alloc_mmu_pages - n_pages; | |
377 | nr_mmu_pages = max(nr_mmu_pages, | |
378 | (unsigned int) KVM_MIN_ALLOC_MMU_PAGES); | |
379 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); | |
380 | } | |
381 | } | |
382 | ||
6aa8b732 | 383 | *memslot = new; |
6aa8b732 | 384 | |
90cb0529 AK |
385 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); |
386 | kvm_flush_remote_tlbs(kvm); | |
6aa8b732 | 387 | |
6aa8b732 AK |
388 | kvm_free_physmem_slot(&old, &new); |
389 | return 0; | |
390 | ||
f78e0e2e | 391 | out_free: |
6aa8b732 AK |
392 | kvm_free_physmem_slot(&new, &old); |
393 | out: | |
394 | return r; | |
210c7c4d IE |
395 | |
396 | } | |
f78e0e2e SY |
397 | EXPORT_SYMBOL_GPL(__kvm_set_memory_region); |
398 | ||
399 | int kvm_set_memory_region(struct kvm *kvm, | |
400 | struct kvm_userspace_memory_region *mem, | |
401 | int user_alloc) | |
402 | { | |
403 | int r; | |
404 | ||
405 | mutex_lock(&kvm->lock); | |
406 | r = __kvm_set_memory_region(kvm, mem, user_alloc); | |
407 | mutex_unlock(&kvm->lock); | |
408 | return r; | |
409 | } | |
210c7c4d IE |
410 | EXPORT_SYMBOL_GPL(kvm_set_memory_region); |
411 | ||
1fe779f8 CO |
412 | int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
413 | struct | |
414 | kvm_userspace_memory_region *mem, | |
415 | int user_alloc) | |
210c7c4d | 416 | { |
e0d62c7f IE |
417 | if (mem->slot >= KVM_MEMORY_SLOTS) |
418 | return -EINVAL; | |
210c7c4d | 419 | return kvm_set_memory_region(kvm, mem, user_alloc); |
6aa8b732 AK |
420 | } |
421 | ||
422 | /* | |
423 | * Get (and clear) the dirty memory log for a memory slot. | |
424 | */ | |
2c6f5df9 AK |
425 | static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
426 | struct kvm_dirty_log *log) | |
6aa8b732 AK |
427 | { |
428 | struct kvm_memory_slot *memslot; | |
429 | int r, i; | |
430 | int n; | |
431 | unsigned long any = 0; | |
432 | ||
11ec2804 | 433 | mutex_lock(&kvm->lock); |
6aa8b732 | 434 | |
6aa8b732 AK |
435 | r = -EINVAL; |
436 | if (log->slot >= KVM_MEMORY_SLOTS) | |
437 | goto out; | |
438 | ||
439 | memslot = &kvm->memslots[log->slot]; | |
440 | r = -ENOENT; | |
441 | if (!memslot->dirty_bitmap) | |
442 | goto out; | |
443 | ||
cd1a4a98 | 444 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
6aa8b732 | 445 | |
cd1a4a98 | 446 | for (i = 0; !any && i < n/sizeof(long); ++i) |
6aa8b732 AK |
447 | any = memslot->dirty_bitmap[i]; |
448 | ||
449 | r = -EFAULT; | |
450 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
451 | goto out; | |
452 | ||
39214915 RR |
453 | /* If nothing is dirty, don't bother messing with page tables. */ |
454 | if (any) { | |
39214915 RR |
455 | kvm_mmu_slot_remove_write_access(kvm, log->slot); |
456 | kvm_flush_remote_tlbs(kvm); | |
457 | memset(memslot->dirty_bitmap, 0, n); | |
39214915 | 458 | } |
6aa8b732 AK |
459 | |
460 | r = 0; | |
461 | ||
462 | out: | |
11ec2804 | 463 | mutex_unlock(&kvm->lock); |
6aa8b732 AK |
464 | return r; |
465 | } | |
466 | ||
cea7bb21 IE |
467 | int is_error_page(struct page *page) |
468 | { | |
469 | return page == bad_page; | |
470 | } | |
471 | EXPORT_SYMBOL_GPL(is_error_page); | |
472 | ||
f9d46eb0 IE |
473 | static inline unsigned long bad_hva(void) |
474 | { | |
475 | return PAGE_OFFSET; | |
476 | } | |
477 | ||
478 | int kvm_is_error_hva(unsigned long addr) | |
479 | { | |
480 | return addr == bad_hva(); | |
481 | } | |
482 | EXPORT_SYMBOL_GPL(kvm_is_error_hva); | |
483 | ||
290fc38d | 484 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
e8207547 AK |
485 | { |
486 | int i; | |
487 | struct kvm_mem_alias *alias; | |
488 | ||
489 | for (i = 0; i < kvm->naliases; ++i) { | |
490 | alias = &kvm->aliases[i]; | |
491 | if (gfn >= alias->base_gfn | |
492 | && gfn < alias->base_gfn + alias->npages) | |
493 | return alias->target_gfn + gfn - alias->base_gfn; | |
494 | } | |
495 | return gfn; | |
496 | } | |
497 | ||
498 | static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
6aa8b732 AK |
499 | { |
500 | int i; | |
501 | ||
502 | for (i = 0; i < kvm->nmemslots; ++i) { | |
503 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
504 | ||
505 | if (gfn >= memslot->base_gfn | |
506 | && gfn < memslot->base_gfn + memslot->npages) | |
507 | return memslot; | |
508 | } | |
8b6d44c7 | 509 | return NULL; |
6aa8b732 | 510 | } |
e8207547 AK |
511 | |
512 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
513 | { | |
514 | gfn = unalias_gfn(kvm, gfn); | |
515 | return __gfn_to_memslot(kvm, gfn); | |
516 | } | |
6aa8b732 | 517 | |
e0d62c7f IE |
518 | int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn) |
519 | { | |
520 | int i; | |
521 | ||
522 | gfn = unalias_gfn(kvm, gfn); | |
523 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
524 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
525 | ||
526 | if (gfn >= memslot->base_gfn | |
527 | && gfn < memslot->base_gfn + memslot->npages) | |
528 | return 1; | |
529 | } | |
530 | return 0; | |
531 | } | |
532 | EXPORT_SYMBOL_GPL(kvm_is_visible_gfn); | |
533 | ||
539cb660 IE |
534 | static unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn) |
535 | { | |
536 | struct kvm_memory_slot *slot; | |
537 | ||
538 | gfn = unalias_gfn(kvm, gfn); | |
539 | slot = __gfn_to_memslot(kvm, gfn); | |
540 | if (!slot) | |
541 | return bad_hva(); | |
542 | return (slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE); | |
543 | } | |
544 | ||
aab61cc0 AL |
545 | /* |
546 | * Requires current->mm->mmap_sem to be held | |
547 | */ | |
548 | static struct page *__gfn_to_page(struct kvm *kvm, gfn_t gfn) | |
954bbbc2 | 549 | { |
8d4e1288 | 550 | struct page *page[1]; |
539cb660 | 551 | unsigned long addr; |
8d4e1288 | 552 | int npages; |
954bbbc2 | 553 | |
60395224 AK |
554 | might_sleep(); |
555 | ||
539cb660 IE |
556 | addr = gfn_to_hva(kvm, gfn); |
557 | if (kvm_is_error_hva(addr)) { | |
8a7ae055 | 558 | get_page(bad_page); |
cea7bb21 | 559 | return bad_page; |
8a7ae055 | 560 | } |
8d4e1288 | 561 | |
539cb660 IE |
562 | npages = get_user_pages(current, current->mm, addr, 1, 1, 1, page, |
563 | NULL); | |
564 | ||
8d4e1288 AL |
565 | if (npages != 1) { |
566 | get_page(bad_page); | |
567 | return bad_page; | |
8a7ae055 | 568 | } |
8d4e1288 AL |
569 | |
570 | return page[0]; | |
954bbbc2 | 571 | } |
aab61cc0 AL |
572 | |
573 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) | |
574 | { | |
575 | struct page *page; | |
576 | ||
577 | down_read(¤t->mm->mmap_sem); | |
578 | page = __gfn_to_page(kvm, gfn); | |
579 | up_read(¤t->mm->mmap_sem); | |
580 | ||
581 | return page; | |
582 | } | |
583 | ||
954bbbc2 AK |
584 | EXPORT_SYMBOL_GPL(gfn_to_page); |
585 | ||
8a7ae055 IE |
586 | void kvm_release_page(struct page *page) |
587 | { | |
588 | if (!PageReserved(page)) | |
589 | SetPageDirty(page); | |
590 | put_page(page); | |
591 | } | |
592 | EXPORT_SYMBOL_GPL(kvm_release_page); | |
593 | ||
195aefde IE |
594 | static int next_segment(unsigned long len, int offset) |
595 | { | |
596 | if (len > PAGE_SIZE - offset) | |
597 | return PAGE_SIZE - offset; | |
598 | else | |
599 | return len; | |
600 | } | |
601 | ||
602 | int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, | |
603 | int len) | |
604 | { | |
e0506bcb IE |
605 | int r; |
606 | unsigned long addr; | |
195aefde | 607 | |
e0506bcb IE |
608 | addr = gfn_to_hva(kvm, gfn); |
609 | if (kvm_is_error_hva(addr)) | |
610 | return -EFAULT; | |
611 | r = copy_from_user(data, (void __user *)addr + offset, len); | |
612 | if (r) | |
195aefde | 613 | return -EFAULT; |
195aefde IE |
614 | return 0; |
615 | } | |
616 | EXPORT_SYMBOL_GPL(kvm_read_guest_page); | |
617 | ||
618 | int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len) | |
619 | { | |
620 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
621 | int seg; | |
622 | int offset = offset_in_page(gpa); | |
623 | int ret; | |
624 | ||
625 | while ((seg = next_segment(len, offset)) != 0) { | |
626 | ret = kvm_read_guest_page(kvm, gfn, data, offset, seg); | |
627 | if (ret < 0) | |
628 | return ret; | |
629 | offset = 0; | |
630 | len -= seg; | |
631 | data += seg; | |
632 | ++gfn; | |
633 | } | |
634 | return 0; | |
635 | } | |
636 | EXPORT_SYMBOL_GPL(kvm_read_guest); | |
637 | ||
638 | int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, | |
639 | int offset, int len) | |
640 | { | |
e0506bcb IE |
641 | int r; |
642 | unsigned long addr; | |
195aefde | 643 | |
e0506bcb IE |
644 | addr = gfn_to_hva(kvm, gfn); |
645 | if (kvm_is_error_hva(addr)) | |
646 | return -EFAULT; | |
647 | r = copy_to_user((void __user *)addr + offset, data, len); | |
648 | if (r) | |
195aefde | 649 | return -EFAULT; |
195aefde IE |
650 | mark_page_dirty(kvm, gfn); |
651 | return 0; | |
652 | } | |
653 | EXPORT_SYMBOL_GPL(kvm_write_guest_page); | |
654 | ||
655 | int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, | |
656 | unsigned long len) | |
657 | { | |
658 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
659 | int seg; | |
660 | int offset = offset_in_page(gpa); | |
661 | int ret; | |
662 | ||
663 | while ((seg = next_segment(len, offset)) != 0) { | |
664 | ret = kvm_write_guest_page(kvm, gfn, data, offset, seg); | |
665 | if (ret < 0) | |
666 | return ret; | |
667 | offset = 0; | |
668 | len -= seg; | |
669 | data += seg; | |
670 | ++gfn; | |
671 | } | |
672 | return 0; | |
673 | } | |
674 | ||
675 | int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len) | |
676 | { | |
677 | void *page_virt; | |
678 | struct page *page; | |
679 | ||
680 | page = gfn_to_page(kvm, gfn); | |
8a7ae055 IE |
681 | if (is_error_page(page)) { |
682 | kvm_release_page(page); | |
195aefde | 683 | return -EFAULT; |
8a7ae055 | 684 | } |
195aefde IE |
685 | page_virt = kmap_atomic(page, KM_USER0); |
686 | ||
687 | memset(page_virt + offset, 0, len); | |
688 | ||
689 | kunmap_atomic(page_virt, KM_USER0); | |
8a7ae055 | 690 | kvm_release_page(page); |
12264760 | 691 | mark_page_dirty(kvm, gfn); |
195aefde IE |
692 | return 0; |
693 | } | |
694 | EXPORT_SYMBOL_GPL(kvm_clear_guest_page); | |
695 | ||
696 | int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len) | |
697 | { | |
698 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
699 | int seg; | |
700 | int offset = offset_in_page(gpa); | |
701 | int ret; | |
702 | ||
703 | while ((seg = next_segment(len, offset)) != 0) { | |
704 | ret = kvm_clear_guest_page(kvm, gfn, offset, seg); | |
705 | if (ret < 0) | |
706 | return ret; | |
707 | offset = 0; | |
708 | len -= seg; | |
709 | ++gfn; | |
710 | } | |
711 | return 0; | |
712 | } | |
713 | EXPORT_SYMBOL_GPL(kvm_clear_guest); | |
714 | ||
6aa8b732 AK |
715 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
716 | { | |
31389947 | 717 | struct kvm_memory_slot *memslot; |
6aa8b732 | 718 | |
3b6fff19 | 719 | gfn = unalias_gfn(kvm, gfn); |
7e9d619d RR |
720 | memslot = __gfn_to_memslot(kvm, gfn); |
721 | if (memslot && memslot->dirty_bitmap) { | |
722 | unsigned long rel_gfn = gfn - memslot->base_gfn; | |
6aa8b732 | 723 | |
7e9d619d RR |
724 | /* avoid RMW */ |
725 | if (!test_bit(rel_gfn, memslot->dirty_bitmap)) | |
726 | set_bit(rel_gfn, memslot->dirty_bitmap); | |
6aa8b732 AK |
727 | } |
728 | } | |
729 | ||
b6958ce4 ED |
730 | /* |
731 | * The vCPU has executed a HLT instruction with in-kernel mode enabled. | |
732 | */ | |
8776e519 | 733 | void kvm_vcpu_block(struct kvm_vcpu *vcpu) |
d3bef15f | 734 | { |
b6958ce4 ED |
735 | DECLARE_WAITQUEUE(wait, current); |
736 | ||
737 | add_wait_queue(&vcpu->wq, &wait); | |
738 | ||
739 | /* | |
740 | * We will block until either an interrupt or a signal wakes us up | |
741 | */ | |
c5ec1534 HQ |
742 | while (!kvm_cpu_has_interrupt(vcpu) |
743 | && !signal_pending(current) | |
744 | && vcpu->mp_state != VCPU_MP_STATE_RUNNABLE | |
745 | && vcpu->mp_state != VCPU_MP_STATE_SIPI_RECEIVED) { | |
b6958ce4 ED |
746 | set_current_state(TASK_INTERRUPTIBLE); |
747 | vcpu_put(vcpu); | |
748 | schedule(); | |
749 | vcpu_load(vcpu); | |
750 | } | |
d3bef15f | 751 | |
c5ec1534 | 752 | __set_current_state(TASK_RUNNING); |
b6958ce4 | 753 | remove_wait_queue(&vcpu->wq, &wait); |
b6958ce4 ED |
754 | } |
755 | ||
6aa8b732 AK |
756 | void kvm_resched(struct kvm_vcpu *vcpu) |
757 | { | |
3fca0365 YD |
758 | if (!need_resched()) |
759 | return; | |
6aa8b732 | 760 | cond_resched(); |
6aa8b732 AK |
761 | } |
762 | EXPORT_SYMBOL_GPL(kvm_resched); | |
763 | ||
6aa8b732 AK |
764 | /* |
765 | * Translate a guest virtual address to a guest physical address. | |
766 | */ | |
bccf2150 AK |
767 | static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
768 | struct kvm_translation *tr) | |
6aa8b732 AK |
769 | { |
770 | unsigned long vaddr = tr->linear_address; | |
6aa8b732 AK |
771 | gpa_t gpa; |
772 | ||
bccf2150 | 773 | vcpu_load(vcpu); |
11ec2804 | 774 | mutex_lock(&vcpu->kvm->lock); |
6aa8b732 AK |
775 | gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr); |
776 | tr->physical_address = gpa; | |
777 | tr->valid = gpa != UNMAPPED_GVA; | |
778 | tr->writeable = 1; | |
779 | tr->usermode = 0; | |
11ec2804 | 780 | mutex_unlock(&vcpu->kvm->lock); |
6aa8b732 AK |
781 | vcpu_put(vcpu); |
782 | ||
783 | return 0; | |
784 | } | |
785 | ||
bccf2150 AK |
786 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
787 | struct kvm_interrupt *irq) | |
6aa8b732 | 788 | { |
6aa8b732 AK |
789 | if (irq->irq < 0 || irq->irq >= 256) |
790 | return -EINVAL; | |
97222cc8 ED |
791 | if (irqchip_in_kernel(vcpu->kvm)) |
792 | return -ENXIO; | |
bccf2150 | 793 | vcpu_load(vcpu); |
6aa8b732 AK |
794 | |
795 | set_bit(irq->irq, vcpu->irq_pending); | |
796 | set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary); | |
797 | ||
798 | vcpu_put(vcpu); | |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
9a2bb7f4 AK |
803 | static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma, |
804 | unsigned long address, | |
805 | int *type) | |
806 | { | |
807 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; | |
808 | unsigned long pgoff; | |
809 | struct page *page; | |
810 | ||
9a2bb7f4 | 811 | pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; |
039576c0 AK |
812 | if (pgoff == 0) |
813 | page = virt_to_page(vcpu->run); | |
814 | else if (pgoff == KVM_PIO_PAGE_OFFSET) | |
815 | page = virt_to_page(vcpu->pio_data); | |
816 | else | |
9a2bb7f4 | 817 | return NOPAGE_SIGBUS; |
9a2bb7f4 | 818 | get_page(page); |
cd0d9137 NAQ |
819 | if (type != NULL) |
820 | *type = VM_FAULT_MINOR; | |
821 | ||
9a2bb7f4 AK |
822 | return page; |
823 | } | |
824 | ||
825 | static struct vm_operations_struct kvm_vcpu_vm_ops = { | |
826 | .nopage = kvm_vcpu_nopage, | |
827 | }; | |
828 | ||
829 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) | |
830 | { | |
831 | vma->vm_ops = &kvm_vcpu_vm_ops; | |
832 | return 0; | |
833 | } | |
834 | ||
bccf2150 AK |
835 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
836 | { | |
837 | struct kvm_vcpu *vcpu = filp->private_data; | |
838 | ||
839 | fput(vcpu->kvm->filp); | |
840 | return 0; | |
841 | } | |
842 | ||
843 | static struct file_operations kvm_vcpu_fops = { | |
844 | .release = kvm_vcpu_release, | |
845 | .unlocked_ioctl = kvm_vcpu_ioctl, | |
846 | .compat_ioctl = kvm_vcpu_ioctl, | |
9a2bb7f4 | 847 | .mmap = kvm_vcpu_mmap, |
bccf2150 AK |
848 | }; |
849 | ||
850 | /* | |
851 | * Allocates an inode for the vcpu. | |
852 | */ | |
853 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) | |
854 | { | |
855 | int fd, r; | |
856 | struct inode *inode; | |
857 | struct file *file; | |
858 | ||
d6d28168 AK |
859 | r = anon_inode_getfd(&fd, &inode, &file, |
860 | "kvm-vcpu", &kvm_vcpu_fops, vcpu); | |
861 | if (r) | |
862 | return r; | |
bccf2150 | 863 | atomic_inc(&vcpu->kvm->filp->f_count); |
bccf2150 | 864 | return fd; |
bccf2150 AK |
865 | } |
866 | ||
c5ea7660 AK |
867 | /* |
868 | * Creates some virtual cpus. Good luck creating more than one. | |
869 | */ | |
870 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n) | |
871 | { | |
872 | int r; | |
873 | struct kvm_vcpu *vcpu; | |
874 | ||
c5ea7660 | 875 | if (!valid_vcpu(n)) |
fb3f0f51 | 876 | return -EINVAL; |
c5ea7660 | 877 | |
e9b11c17 | 878 | vcpu = kvm_arch_vcpu_create(kvm, n); |
fb3f0f51 RR |
879 | if (IS_ERR(vcpu)) |
880 | return PTR_ERR(vcpu); | |
c5ea7660 | 881 | |
15ad7146 AK |
882 | preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops); |
883 | ||
11ec2804 | 884 | mutex_lock(&kvm->lock); |
fb3f0f51 RR |
885 | if (kvm->vcpus[n]) { |
886 | r = -EEXIST; | |
11ec2804 | 887 | mutex_unlock(&kvm->lock); |
e9b11c17 | 888 | goto vcpu_destroy; |
fb3f0f51 RR |
889 | } |
890 | kvm->vcpus[n] = vcpu; | |
11ec2804 | 891 | mutex_unlock(&kvm->lock); |
c5ea7660 | 892 | |
fb3f0f51 | 893 | /* Now it's all set up, let userspace reach it */ |
bccf2150 AK |
894 | r = create_vcpu_fd(vcpu); |
895 | if (r < 0) | |
fb3f0f51 RR |
896 | goto unlink; |
897 | return r; | |
39c3b86e | 898 | |
fb3f0f51 | 899 | unlink: |
11ec2804 | 900 | mutex_lock(&kvm->lock); |
fb3f0f51 | 901 | kvm->vcpus[n] = NULL; |
11ec2804 | 902 | mutex_unlock(&kvm->lock); |
e9b11c17 ZX |
903 | vcpu_destroy: |
904 | kvm_arch_vcpu_destory(vcpu); | |
c5ea7660 AK |
905 | return r; |
906 | } | |
907 | ||
1961d276 AK |
908 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
909 | { | |
910 | if (sigset) { | |
911 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
912 | vcpu->sigset_active = 1; | |
913 | vcpu->sigset = *sigset; | |
914 | } else | |
915 | vcpu->sigset_active = 0; | |
916 | return 0; | |
917 | } | |
918 | ||
bccf2150 AK |
919 | static long kvm_vcpu_ioctl(struct file *filp, |
920 | unsigned int ioctl, unsigned long arg) | |
6aa8b732 | 921 | { |
bccf2150 | 922 | struct kvm_vcpu *vcpu = filp->private_data; |
2f366987 | 923 | void __user *argp = (void __user *)arg; |
313a3dc7 | 924 | int r; |
6aa8b732 AK |
925 | |
926 | switch (ioctl) { | |
9a2bb7f4 | 927 | case KVM_RUN: |
f0fe5108 AK |
928 | r = -EINVAL; |
929 | if (arg) | |
930 | goto out; | |
b6c7a5dc | 931 | r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run); |
6aa8b732 | 932 | break; |
6aa8b732 AK |
933 | case KVM_GET_REGS: { |
934 | struct kvm_regs kvm_regs; | |
935 | ||
bccf2150 | 936 | memset(&kvm_regs, 0, sizeof kvm_regs); |
b6c7a5dc | 937 | r = kvm_arch_vcpu_ioctl_get_regs(vcpu, &kvm_regs); |
6aa8b732 AK |
938 | if (r) |
939 | goto out; | |
940 | r = -EFAULT; | |
2f366987 | 941 | if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs)) |
6aa8b732 AK |
942 | goto out; |
943 | r = 0; | |
944 | break; | |
945 | } | |
946 | case KVM_SET_REGS: { | |
947 | struct kvm_regs kvm_regs; | |
948 | ||
949 | r = -EFAULT; | |
2f366987 | 950 | if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs)) |
6aa8b732 | 951 | goto out; |
b6c7a5dc | 952 | r = kvm_arch_vcpu_ioctl_set_regs(vcpu, &kvm_regs); |
6aa8b732 AK |
953 | if (r) |
954 | goto out; | |
955 | r = 0; | |
956 | break; | |
957 | } | |
958 | case KVM_GET_SREGS: { | |
959 | struct kvm_sregs kvm_sregs; | |
960 | ||
bccf2150 | 961 | memset(&kvm_sregs, 0, sizeof kvm_sregs); |
b6c7a5dc | 962 | r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs); |
6aa8b732 AK |
963 | if (r) |
964 | goto out; | |
965 | r = -EFAULT; | |
2f366987 | 966 | if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs)) |
6aa8b732 AK |
967 | goto out; |
968 | r = 0; | |
969 | break; | |
970 | } | |
971 | case KVM_SET_SREGS: { | |
972 | struct kvm_sregs kvm_sregs; | |
973 | ||
974 | r = -EFAULT; | |
2f366987 | 975 | if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs)) |
6aa8b732 | 976 | goto out; |
b6c7a5dc | 977 | r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs); |
6aa8b732 AK |
978 | if (r) |
979 | goto out; | |
980 | r = 0; | |
981 | break; | |
982 | } | |
983 | case KVM_TRANSLATE: { | |
984 | struct kvm_translation tr; | |
985 | ||
986 | r = -EFAULT; | |
2f366987 | 987 | if (copy_from_user(&tr, argp, sizeof tr)) |
6aa8b732 | 988 | goto out; |
bccf2150 | 989 | r = kvm_vcpu_ioctl_translate(vcpu, &tr); |
6aa8b732 AK |
990 | if (r) |
991 | goto out; | |
992 | r = -EFAULT; | |
2f366987 | 993 | if (copy_to_user(argp, &tr, sizeof tr)) |
6aa8b732 AK |
994 | goto out; |
995 | r = 0; | |
996 | break; | |
997 | } | |
998 | case KVM_INTERRUPT: { | |
999 | struct kvm_interrupt irq; | |
1000 | ||
1001 | r = -EFAULT; | |
2f366987 | 1002 | if (copy_from_user(&irq, argp, sizeof irq)) |
6aa8b732 | 1003 | goto out; |
bccf2150 | 1004 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); |
6aa8b732 AK |
1005 | if (r) |
1006 | goto out; | |
1007 | r = 0; | |
1008 | break; | |
1009 | } | |
1010 | case KVM_DEBUG_GUEST: { | |
1011 | struct kvm_debug_guest dbg; | |
1012 | ||
1013 | r = -EFAULT; | |
2f366987 | 1014 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
6aa8b732 | 1015 | goto out; |
b6c7a5dc | 1016 | r = kvm_arch_vcpu_ioctl_debug_guest(vcpu, &dbg); |
6aa8b732 AK |
1017 | if (r) |
1018 | goto out; | |
1019 | r = 0; | |
1020 | break; | |
1021 | } | |
1961d276 AK |
1022 | case KVM_SET_SIGNAL_MASK: { |
1023 | struct kvm_signal_mask __user *sigmask_arg = argp; | |
1024 | struct kvm_signal_mask kvm_sigmask; | |
1025 | sigset_t sigset, *p; | |
1026 | ||
1027 | p = NULL; | |
1028 | if (argp) { | |
1029 | r = -EFAULT; | |
1030 | if (copy_from_user(&kvm_sigmask, argp, | |
1031 | sizeof kvm_sigmask)) | |
1032 | goto out; | |
1033 | r = -EINVAL; | |
1034 | if (kvm_sigmask.len != sizeof sigset) | |
1035 | goto out; | |
1036 | r = -EFAULT; | |
1037 | if (copy_from_user(&sigset, sigmask_arg->sigset, | |
1038 | sizeof sigset)) | |
1039 | goto out; | |
1040 | p = &sigset; | |
1041 | } | |
1042 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); | |
1043 | break; | |
1044 | } | |
b8836737 AK |
1045 | case KVM_GET_FPU: { |
1046 | struct kvm_fpu fpu; | |
1047 | ||
1048 | memset(&fpu, 0, sizeof fpu); | |
d0752060 | 1049 | r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, &fpu); |
b8836737 AK |
1050 | if (r) |
1051 | goto out; | |
1052 | r = -EFAULT; | |
1053 | if (copy_to_user(argp, &fpu, sizeof fpu)) | |
1054 | goto out; | |
1055 | r = 0; | |
1056 | break; | |
1057 | } | |
1058 | case KVM_SET_FPU: { | |
1059 | struct kvm_fpu fpu; | |
1060 | ||
1061 | r = -EFAULT; | |
1062 | if (copy_from_user(&fpu, argp, sizeof fpu)) | |
1063 | goto out; | |
d0752060 | 1064 | r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, &fpu); |
b8836737 AK |
1065 | if (r) |
1066 | goto out; | |
1067 | r = 0; | |
1068 | break; | |
1069 | } | |
bccf2150 | 1070 | default: |
313a3dc7 | 1071 | r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
bccf2150 AK |
1072 | } |
1073 | out: | |
1074 | return r; | |
1075 | } | |
1076 | ||
1077 | static long kvm_vm_ioctl(struct file *filp, | |
1078 | unsigned int ioctl, unsigned long arg) | |
1079 | { | |
1080 | struct kvm *kvm = filp->private_data; | |
1081 | void __user *argp = (void __user *)arg; | |
1fe779f8 | 1082 | int r; |
bccf2150 AK |
1083 | |
1084 | switch (ioctl) { | |
1085 | case KVM_CREATE_VCPU: | |
1086 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); | |
1087 | if (r < 0) | |
1088 | goto out; | |
1089 | break; | |
6fc138d2 IE |
1090 | case KVM_SET_USER_MEMORY_REGION: { |
1091 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
1092 | ||
1093 | r = -EFAULT; | |
1094 | if (copy_from_user(&kvm_userspace_mem, argp, | |
1095 | sizeof kvm_userspace_mem)) | |
1096 | goto out; | |
1097 | ||
1098 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1); | |
6aa8b732 AK |
1099 | if (r) |
1100 | goto out; | |
1101 | break; | |
1102 | } | |
1103 | case KVM_GET_DIRTY_LOG: { | |
1104 | struct kvm_dirty_log log; | |
1105 | ||
1106 | r = -EFAULT; | |
2f366987 | 1107 | if (copy_from_user(&log, argp, sizeof log)) |
6aa8b732 | 1108 | goto out; |
2c6f5df9 | 1109 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
6aa8b732 AK |
1110 | if (r) |
1111 | goto out; | |
1112 | break; | |
1113 | } | |
f17abe9a | 1114 | default: |
1fe779f8 | 1115 | r = kvm_arch_vm_ioctl(filp, ioctl, arg); |
f17abe9a AK |
1116 | } |
1117 | out: | |
1118 | return r; | |
1119 | } | |
1120 | ||
1121 | static struct page *kvm_vm_nopage(struct vm_area_struct *vma, | |
1122 | unsigned long address, | |
1123 | int *type) | |
1124 | { | |
1125 | struct kvm *kvm = vma->vm_file->private_data; | |
1126 | unsigned long pgoff; | |
f17abe9a AK |
1127 | struct page *page; |
1128 | ||
f17abe9a | 1129 | pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; |
e0d62c7f IE |
1130 | if (!kvm_is_visible_gfn(kvm, pgoff)) |
1131 | return NOPAGE_SIGBUS; | |
aab61cc0 AL |
1132 | /* current->mm->mmap_sem is already held so call lockless version */ |
1133 | page = __gfn_to_page(kvm, pgoff); | |
8a7ae055 IE |
1134 | if (is_error_page(page)) { |
1135 | kvm_release_page(page); | |
f17abe9a | 1136 | return NOPAGE_SIGBUS; |
8a7ae055 | 1137 | } |
cd0d9137 NAQ |
1138 | if (type != NULL) |
1139 | *type = VM_FAULT_MINOR; | |
1140 | ||
f17abe9a AK |
1141 | return page; |
1142 | } | |
1143 | ||
1144 | static struct vm_operations_struct kvm_vm_vm_ops = { | |
1145 | .nopage = kvm_vm_nopage, | |
1146 | }; | |
1147 | ||
1148 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) | |
1149 | { | |
1150 | vma->vm_ops = &kvm_vm_vm_ops; | |
1151 | return 0; | |
1152 | } | |
1153 | ||
1154 | static struct file_operations kvm_vm_fops = { | |
1155 | .release = kvm_vm_release, | |
1156 | .unlocked_ioctl = kvm_vm_ioctl, | |
1157 | .compat_ioctl = kvm_vm_ioctl, | |
1158 | .mmap = kvm_vm_mmap, | |
1159 | }; | |
1160 | ||
1161 | static int kvm_dev_ioctl_create_vm(void) | |
1162 | { | |
1163 | int fd, r; | |
1164 | struct inode *inode; | |
1165 | struct file *file; | |
1166 | struct kvm *kvm; | |
1167 | ||
f17abe9a | 1168 | kvm = kvm_create_vm(); |
d6d28168 AK |
1169 | if (IS_ERR(kvm)) |
1170 | return PTR_ERR(kvm); | |
1171 | r = anon_inode_getfd(&fd, &inode, &file, "kvm-vm", &kvm_vm_fops, kvm); | |
1172 | if (r) { | |
1173 | kvm_destroy_vm(kvm); | |
1174 | return r; | |
f17abe9a AK |
1175 | } |
1176 | ||
bccf2150 | 1177 | kvm->filp = file; |
f17abe9a | 1178 | |
f17abe9a | 1179 | return fd; |
f17abe9a AK |
1180 | } |
1181 | ||
1182 | static long kvm_dev_ioctl(struct file *filp, | |
1183 | unsigned int ioctl, unsigned long arg) | |
1184 | { | |
1185 | void __user *argp = (void __user *)arg; | |
07c45a36 | 1186 | long r = -EINVAL; |
f17abe9a AK |
1187 | |
1188 | switch (ioctl) { | |
1189 | case KVM_GET_API_VERSION: | |
f0fe5108 AK |
1190 | r = -EINVAL; |
1191 | if (arg) | |
1192 | goto out; | |
f17abe9a AK |
1193 | r = KVM_API_VERSION; |
1194 | break; | |
1195 | case KVM_CREATE_VM: | |
f0fe5108 AK |
1196 | r = -EINVAL; |
1197 | if (arg) | |
1198 | goto out; | |
f17abe9a AK |
1199 | r = kvm_dev_ioctl_create_vm(); |
1200 | break; | |
85f455f7 ED |
1201 | case KVM_CHECK_EXTENSION: { |
1202 | int ext = (long)argp; | |
1203 | ||
1204 | switch (ext) { | |
1205 | case KVM_CAP_IRQCHIP: | |
b6958ce4 | 1206 | case KVM_CAP_HLT: |
82ce2c96 | 1207 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: |
6fc138d2 | 1208 | case KVM_CAP_USER_MEMORY: |
cbc94022 | 1209 | case KVM_CAP_SET_TSS_ADDR: |
85f455f7 ED |
1210 | r = 1; |
1211 | break; | |
1212 | default: | |
1213 | r = 0; | |
1214 | break; | |
1215 | } | |
5d308f45 | 1216 | break; |
85f455f7 | 1217 | } |
07c45a36 AK |
1218 | case KVM_GET_VCPU_MMAP_SIZE: |
1219 | r = -EINVAL; | |
1220 | if (arg) | |
1221 | goto out; | |
039576c0 | 1222 | r = 2 * PAGE_SIZE; |
07c45a36 | 1223 | break; |
6aa8b732 | 1224 | default: |
043405e1 | 1225 | return kvm_arch_dev_ioctl(filp, ioctl, arg); |
6aa8b732 AK |
1226 | } |
1227 | out: | |
1228 | return r; | |
1229 | } | |
1230 | ||
6aa8b732 | 1231 | static struct file_operations kvm_chardev_ops = { |
6aa8b732 AK |
1232 | .unlocked_ioctl = kvm_dev_ioctl, |
1233 | .compat_ioctl = kvm_dev_ioctl, | |
6aa8b732 AK |
1234 | }; |
1235 | ||
1236 | static struct miscdevice kvm_dev = { | |
bbe4432e | 1237 | KVM_MINOR, |
6aa8b732 AK |
1238 | "kvm", |
1239 | &kvm_chardev_ops, | |
1240 | }; | |
1241 | ||
1b6c0168 AK |
1242 | static void hardware_enable(void *junk) |
1243 | { | |
1244 | int cpu = raw_smp_processor_id(); | |
1245 | ||
1246 | if (cpu_isset(cpu, cpus_hardware_enabled)) | |
1247 | return; | |
1248 | cpu_set(cpu, cpus_hardware_enabled); | |
e9b11c17 | 1249 | kvm_arch_hardware_enable(NULL); |
1b6c0168 AK |
1250 | } |
1251 | ||
1252 | static void hardware_disable(void *junk) | |
1253 | { | |
1254 | int cpu = raw_smp_processor_id(); | |
1255 | ||
1256 | if (!cpu_isset(cpu, cpus_hardware_enabled)) | |
1257 | return; | |
1258 | cpu_clear(cpu, cpus_hardware_enabled); | |
1259 | decache_vcpus_on_cpu(cpu); | |
e9b11c17 | 1260 | kvm_arch_hardware_disable(NULL); |
1b6c0168 AK |
1261 | } |
1262 | ||
774c47f1 AK |
1263 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, |
1264 | void *v) | |
1265 | { | |
1266 | int cpu = (long)v; | |
1267 | ||
1a6f4d7f | 1268 | val &= ~CPU_TASKS_FROZEN; |
774c47f1 | 1269 | switch (val) { |
cec9ad27 | 1270 | case CPU_DYING: |
6ec8a856 AK |
1271 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
1272 | cpu); | |
1273 | hardware_disable(NULL); | |
1274 | break; | |
774c47f1 | 1275 | case CPU_UP_CANCELED: |
43934a38 JK |
1276 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
1277 | cpu); | |
1b6c0168 | 1278 | smp_call_function_single(cpu, hardware_disable, NULL, 0, 1); |
774c47f1 | 1279 | break; |
43934a38 JK |
1280 | case CPU_ONLINE: |
1281 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", | |
1282 | cpu); | |
1b6c0168 | 1283 | smp_call_function_single(cpu, hardware_enable, NULL, 0, 1); |
774c47f1 AK |
1284 | break; |
1285 | } | |
1286 | return NOTIFY_OK; | |
1287 | } | |
1288 | ||
9a2b85c6 | 1289 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, |
d77c26fc | 1290 | void *v) |
9a2b85c6 RR |
1291 | { |
1292 | if (val == SYS_RESTART) { | |
1293 | /* | |
1294 | * Some (well, at least mine) BIOSes hang on reboot if | |
1295 | * in vmx root mode. | |
1296 | */ | |
1297 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); | |
1298 | on_each_cpu(hardware_disable, NULL, 0, 1); | |
1299 | } | |
1300 | return NOTIFY_OK; | |
1301 | } | |
1302 | ||
1303 | static struct notifier_block kvm_reboot_notifier = { | |
1304 | .notifier_call = kvm_reboot, | |
1305 | .priority = 0, | |
1306 | }; | |
1307 | ||
2eeb2e94 GH |
1308 | void kvm_io_bus_init(struct kvm_io_bus *bus) |
1309 | { | |
1310 | memset(bus, 0, sizeof(*bus)); | |
1311 | } | |
1312 | ||
1313 | void kvm_io_bus_destroy(struct kvm_io_bus *bus) | |
1314 | { | |
1315 | int i; | |
1316 | ||
1317 | for (i = 0; i < bus->dev_count; i++) { | |
1318 | struct kvm_io_device *pos = bus->devs[i]; | |
1319 | ||
1320 | kvm_iodevice_destructor(pos); | |
1321 | } | |
1322 | } | |
1323 | ||
1324 | struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr) | |
1325 | { | |
1326 | int i; | |
1327 | ||
1328 | for (i = 0; i < bus->dev_count; i++) { | |
1329 | struct kvm_io_device *pos = bus->devs[i]; | |
1330 | ||
1331 | if (pos->in_range(pos, addr)) | |
1332 | return pos; | |
1333 | } | |
1334 | ||
1335 | return NULL; | |
1336 | } | |
1337 | ||
1338 | void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev) | |
1339 | { | |
1340 | BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1)); | |
1341 | ||
1342 | bus->devs[bus->dev_count++] = dev; | |
1343 | } | |
1344 | ||
774c47f1 AK |
1345 | static struct notifier_block kvm_cpu_notifier = { |
1346 | .notifier_call = kvm_cpu_hotplug, | |
1347 | .priority = 20, /* must be > scheduler priority */ | |
1348 | }; | |
1349 | ||
1165f5fe AK |
1350 | static u64 stat_get(void *_offset) |
1351 | { | |
1352 | unsigned offset = (long)_offset; | |
1353 | u64 total = 0; | |
1354 | struct kvm *kvm; | |
1355 | struct kvm_vcpu *vcpu; | |
1356 | int i; | |
1357 | ||
1358 | spin_lock(&kvm_lock); | |
1359 | list_for_each_entry(kvm, &vm_list, vm_list) | |
1360 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
fb3f0f51 RR |
1361 | vcpu = kvm->vcpus[i]; |
1362 | if (vcpu) | |
1363 | total += *(u32 *)((void *)vcpu + offset); | |
1165f5fe AK |
1364 | } |
1365 | spin_unlock(&kvm_lock); | |
1366 | return total; | |
1367 | } | |
1368 | ||
3dea7ca7 | 1369 | DEFINE_SIMPLE_ATTRIBUTE(stat_fops, stat_get, NULL, "%llu\n"); |
1165f5fe | 1370 | |
6aa8b732 AK |
1371 | static __init void kvm_init_debug(void) |
1372 | { | |
1373 | struct kvm_stats_debugfs_item *p; | |
1374 | ||
8b6d44c7 | 1375 | debugfs_dir = debugfs_create_dir("kvm", NULL); |
6aa8b732 | 1376 | for (p = debugfs_entries; p->name; ++p) |
1165f5fe AK |
1377 | p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir, |
1378 | (void *)(long)p->offset, | |
1379 | &stat_fops); | |
6aa8b732 AK |
1380 | } |
1381 | ||
1382 | static void kvm_exit_debug(void) | |
1383 | { | |
1384 | struct kvm_stats_debugfs_item *p; | |
1385 | ||
1386 | for (p = debugfs_entries; p->name; ++p) | |
1387 | debugfs_remove(p->dentry); | |
1388 | debugfs_remove(debugfs_dir); | |
1389 | } | |
1390 | ||
59ae6c6b AK |
1391 | static int kvm_suspend(struct sys_device *dev, pm_message_t state) |
1392 | { | |
4267c41a | 1393 | hardware_disable(NULL); |
59ae6c6b AK |
1394 | return 0; |
1395 | } | |
1396 | ||
1397 | static int kvm_resume(struct sys_device *dev) | |
1398 | { | |
4267c41a | 1399 | hardware_enable(NULL); |
59ae6c6b AK |
1400 | return 0; |
1401 | } | |
1402 | ||
1403 | static struct sysdev_class kvm_sysdev_class = { | |
af5ca3f4 | 1404 | .name = "kvm", |
59ae6c6b AK |
1405 | .suspend = kvm_suspend, |
1406 | .resume = kvm_resume, | |
1407 | }; | |
1408 | ||
1409 | static struct sys_device kvm_sysdev = { | |
1410 | .id = 0, | |
1411 | .cls = &kvm_sysdev_class, | |
1412 | }; | |
1413 | ||
cea7bb21 | 1414 | struct page *bad_page; |
6aa8b732 | 1415 | |
15ad7146 AK |
1416 | static inline |
1417 | struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn) | |
1418 | { | |
1419 | return container_of(pn, struct kvm_vcpu, preempt_notifier); | |
1420 | } | |
1421 | ||
1422 | static void kvm_sched_in(struct preempt_notifier *pn, int cpu) | |
1423 | { | |
1424 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
1425 | ||
e9b11c17 | 1426 | kvm_arch_vcpu_load(vcpu, cpu); |
15ad7146 AK |
1427 | } |
1428 | ||
1429 | static void kvm_sched_out(struct preempt_notifier *pn, | |
1430 | struct task_struct *next) | |
1431 | { | |
1432 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
1433 | ||
e9b11c17 | 1434 | kvm_arch_vcpu_put(vcpu); |
15ad7146 AK |
1435 | } |
1436 | ||
cb498ea2 | 1437 | int kvm_init(struct kvm_x86_ops *ops, unsigned int vcpu_size, |
c16f862d | 1438 | struct module *module) |
6aa8b732 AK |
1439 | { |
1440 | int r; | |
002c7f7c | 1441 | int cpu; |
6aa8b732 | 1442 | |
cb498ea2 ZX |
1443 | r = kvm_mmu_module_init(); |
1444 | if (r) | |
1445 | goto out4; | |
1446 | ||
1447 | kvm_init_debug(); | |
1448 | ||
1449 | kvm_arch_init(); | |
1450 | ||
1451 | bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
1452 | ||
1453 | if (bad_page == NULL) { | |
1454 | r = -ENOMEM; | |
1455 | goto out; | |
1456 | } | |
1457 | ||
cbdd1bea | 1458 | if (kvm_x86_ops) { |
09db28b8 YI |
1459 | printk(KERN_ERR "kvm: already loaded the other module\n"); |
1460 | return -EEXIST; | |
1461 | } | |
1462 | ||
e097f35c | 1463 | if (!ops->cpu_has_kvm_support()) { |
6aa8b732 AK |
1464 | printk(KERN_ERR "kvm: no hardware support\n"); |
1465 | return -EOPNOTSUPP; | |
1466 | } | |
e097f35c | 1467 | if (ops->disabled_by_bios()) { |
6aa8b732 AK |
1468 | printk(KERN_ERR "kvm: disabled by bios\n"); |
1469 | return -EOPNOTSUPP; | |
1470 | } | |
1471 | ||
cbdd1bea | 1472 | kvm_x86_ops = ops; |
e097f35c | 1473 | |
e9b11c17 | 1474 | r = kvm_arch_hardware_setup(); |
6aa8b732 | 1475 | if (r < 0) |
ca45aaae | 1476 | goto out; |
6aa8b732 | 1477 | |
002c7f7c YS |
1478 | for_each_online_cpu(cpu) { |
1479 | smp_call_function_single(cpu, | |
e9b11c17 | 1480 | kvm_arch_check_processor_compat, |
002c7f7c YS |
1481 | &r, 0, 1); |
1482 | if (r < 0) | |
1483 | goto out_free_0; | |
1484 | } | |
1485 | ||
1b6c0168 | 1486 | on_each_cpu(hardware_enable, NULL, 0, 1); |
774c47f1 AK |
1487 | r = register_cpu_notifier(&kvm_cpu_notifier); |
1488 | if (r) | |
1489 | goto out_free_1; | |
6aa8b732 AK |
1490 | register_reboot_notifier(&kvm_reboot_notifier); |
1491 | ||
59ae6c6b AK |
1492 | r = sysdev_class_register(&kvm_sysdev_class); |
1493 | if (r) | |
1494 | goto out_free_2; | |
1495 | ||
1496 | r = sysdev_register(&kvm_sysdev); | |
1497 | if (r) | |
1498 | goto out_free_3; | |
1499 | ||
c16f862d RR |
1500 | /* A kmem cache lets us meet the alignment requirements of fx_save. */ |
1501 | kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, | |
1502 | __alignof__(struct kvm_vcpu), 0, 0); | |
1503 | if (!kvm_vcpu_cache) { | |
1504 | r = -ENOMEM; | |
1505 | goto out_free_4; | |
1506 | } | |
1507 | ||
6aa8b732 AK |
1508 | kvm_chardev_ops.owner = module; |
1509 | ||
1510 | r = misc_register(&kvm_dev); | |
1511 | if (r) { | |
d77c26fc | 1512 | printk(KERN_ERR "kvm: misc device register failed\n"); |
6aa8b732 AK |
1513 | goto out_free; |
1514 | } | |
1515 | ||
15ad7146 AK |
1516 | kvm_preempt_ops.sched_in = kvm_sched_in; |
1517 | kvm_preempt_ops.sched_out = kvm_sched_out; | |
1518 | ||
c7addb90 AK |
1519 | kvm_mmu_set_nonpresent_ptes(0ull, 0ull); |
1520 | ||
1521 | return 0; | |
6aa8b732 AK |
1522 | |
1523 | out_free: | |
c16f862d RR |
1524 | kmem_cache_destroy(kvm_vcpu_cache); |
1525 | out_free_4: | |
59ae6c6b AK |
1526 | sysdev_unregister(&kvm_sysdev); |
1527 | out_free_3: | |
1528 | sysdev_class_unregister(&kvm_sysdev_class); | |
1529 | out_free_2: | |
6aa8b732 | 1530 | unregister_reboot_notifier(&kvm_reboot_notifier); |
774c47f1 AK |
1531 | unregister_cpu_notifier(&kvm_cpu_notifier); |
1532 | out_free_1: | |
1b6c0168 | 1533 | on_each_cpu(hardware_disable, NULL, 0, 1); |
002c7f7c | 1534 | out_free_0: |
e9b11c17 | 1535 | kvm_arch_hardware_unsetup(); |
ca45aaae | 1536 | out: |
cbdd1bea | 1537 | kvm_x86_ops = NULL; |
cb498ea2 ZX |
1538 | kvm_exit_debug(); |
1539 | kvm_mmu_module_exit(); | |
1540 | out4: | |
6aa8b732 AK |
1541 | return r; |
1542 | } | |
cb498ea2 | 1543 | EXPORT_SYMBOL_GPL(kvm_init); |
6aa8b732 | 1544 | |
cb498ea2 | 1545 | void kvm_exit(void) |
6aa8b732 AK |
1546 | { |
1547 | misc_deregister(&kvm_dev); | |
c16f862d | 1548 | kmem_cache_destroy(kvm_vcpu_cache); |
59ae6c6b AK |
1549 | sysdev_unregister(&kvm_sysdev); |
1550 | sysdev_class_unregister(&kvm_sysdev_class); | |
6aa8b732 | 1551 | unregister_reboot_notifier(&kvm_reboot_notifier); |
59ae6c6b | 1552 | unregister_cpu_notifier(&kvm_cpu_notifier); |
1b6c0168 | 1553 | on_each_cpu(hardware_disable, NULL, 0, 1); |
e9b11c17 | 1554 | kvm_arch_hardware_unsetup(); |
cbdd1bea | 1555 | kvm_x86_ops = NULL; |
6aa8b732 | 1556 | kvm_exit_debug(); |
cea7bb21 | 1557 | __free_page(bad_page); |
b5a33a75 | 1558 | kvm_mmu_module_exit(); |
6aa8b732 | 1559 | } |
cb498ea2 | 1560 | EXPORT_SYMBOL_GPL(kvm_exit); |