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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. | |
9611c187 | 8 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. |
6aa8b732 AK |
9 | * |
10 | * Authors: | |
11 | * Avi Kivity <avi@qumranet.com> | |
12 | * Yaniv Kamay <yaniv@qumranet.com> | |
13 | * | |
14 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
15 | * the COPYING file in the top-level directory. | |
16 | * | |
17 | */ | |
18 | ||
e2174021 | 19 | #include "iodev.h" |
6aa8b732 | 20 | |
edf88417 | 21 | #include <linux/kvm_host.h> |
6aa8b732 AK |
22 | #include <linux/kvm.h> |
23 | #include <linux/module.h> | |
24 | #include <linux/errno.h> | |
6aa8b732 | 25 | #include <linux/percpu.h> |
6aa8b732 AK |
26 | #include <linux/mm.h> |
27 | #include <linux/miscdevice.h> | |
28 | #include <linux/vmalloc.h> | |
6aa8b732 | 29 | #include <linux/reboot.h> |
6aa8b732 AK |
30 | #include <linux/debugfs.h> |
31 | #include <linux/highmem.h> | |
32 | #include <linux/file.h> | |
fb3600cc | 33 | #include <linux/syscore_ops.h> |
774c47f1 | 34 | #include <linux/cpu.h> |
e8edc6e0 | 35 | #include <linux/sched.h> |
d9e368d6 AK |
36 | #include <linux/cpumask.h> |
37 | #include <linux/smp.h> | |
d6d28168 | 38 | #include <linux/anon_inodes.h> |
04d2cc77 | 39 | #include <linux/profile.h> |
7aa81cc0 | 40 | #include <linux/kvm_para.h> |
6fc138d2 | 41 | #include <linux/pagemap.h> |
8d4e1288 | 42 | #include <linux/mman.h> |
35149e21 | 43 | #include <linux/swap.h> |
e56d532f | 44 | #include <linux/bitops.h> |
547de29e | 45 | #include <linux/spinlock.h> |
6ff5894c | 46 | #include <linux/compat.h> |
bc6678a3 | 47 | #include <linux/srcu.h> |
8f0b1ab6 | 48 | #include <linux/hugetlb.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
743eeb0b SL |
50 | #include <linux/sort.h> |
51 | #include <linux/bsearch.h> | |
6aa8b732 | 52 | |
e495606d | 53 | #include <asm/processor.h> |
e495606d AK |
54 | #include <asm/io.h> |
55 | #include <asm/uaccess.h> | |
3e021bf5 | 56 | #include <asm/pgtable.h> |
6aa8b732 | 57 | |
5f94c174 | 58 | #include "coalesced_mmio.h" |
af585b92 | 59 | #include "async_pf.h" |
5f94c174 | 60 | |
229456fc MT |
61 | #define CREATE_TRACE_POINTS |
62 | #include <trace/events/kvm.h> | |
63 | ||
6aa8b732 AK |
64 | MODULE_AUTHOR("Qumranet"); |
65 | MODULE_LICENSE("GPL"); | |
66 | ||
fa40a821 MT |
67 | /* |
68 | * Ordering of locks: | |
69 | * | |
fae3a353 | 70 | * kvm->lock --> kvm->slots_lock --> kvm->irq_lock |
fa40a821 MT |
71 | */ |
72 | ||
e935b837 | 73 | DEFINE_RAW_SPINLOCK(kvm_lock); |
e9b11c17 | 74 | LIST_HEAD(vm_list); |
133de902 | 75 | |
7f59f492 | 76 | static cpumask_var_t cpus_hardware_enabled; |
10474ae8 AG |
77 | static int kvm_usage_count = 0; |
78 | static atomic_t hardware_enable_failed; | |
1b6c0168 | 79 | |
c16f862d RR |
80 | struct kmem_cache *kvm_vcpu_cache; |
81 | EXPORT_SYMBOL_GPL(kvm_vcpu_cache); | |
1165f5fe | 82 | |
15ad7146 AK |
83 | static __read_mostly struct preempt_ops kvm_preempt_ops; |
84 | ||
76f7c879 | 85 | struct dentry *kvm_debugfs_dir; |
6aa8b732 | 86 | |
bccf2150 AK |
87 | static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, |
88 | unsigned long arg); | |
1dda606c AG |
89 | #ifdef CONFIG_COMPAT |
90 | static long kvm_vcpu_compat_ioctl(struct file *file, unsigned int ioctl, | |
91 | unsigned long arg); | |
92 | #endif | |
10474ae8 AG |
93 | static int hardware_enable_all(void); |
94 | static void hardware_disable_all(void); | |
bccf2150 | 95 | |
e93f8a0f MT |
96 | static void kvm_io_bus_destroy(struct kvm_io_bus *bus); |
97 | ||
b7c4145b AK |
98 | bool kvm_rebooting; |
99 | EXPORT_SYMBOL_GPL(kvm_rebooting); | |
4ecac3fd | 100 | |
54dee993 MT |
101 | static bool largepages_enabled = true; |
102 | ||
ca0565f5 XG |
103 | struct page *bad_page; |
104 | static pfn_t bad_pfn; | |
105 | ||
fa7bff8f GN |
106 | static struct page *hwpoison_page; |
107 | static pfn_t hwpoison_pfn; | |
bf998156 | 108 | |
903816fa XG |
109 | static struct page *fault_page; |
110 | static pfn_t fault_pfn; | |
edba23e5 | 111 | |
c77fb9dc | 112 | inline int kvm_is_mmio_pfn(pfn_t pfn) |
cbff90a7 | 113 | { |
fc5659c8 | 114 | if (pfn_valid(pfn)) { |
22e5c47e | 115 | int reserved; |
936a5fe6 | 116 | struct page *tail = pfn_to_page(pfn); |
22e5c47e AA |
117 | struct page *head = compound_trans_head(tail); |
118 | reserved = PageReserved(head); | |
936a5fe6 | 119 | if (head != tail) { |
936a5fe6 | 120 | /* |
22e5c47e AA |
121 | * "head" is not a dangling pointer |
122 | * (compound_trans_head takes care of that) | |
123 | * but the hugepage may have been splitted | |
124 | * from under us (and we may not hold a | |
125 | * reference count on the head page so it can | |
126 | * be reused before we run PageReferenced), so | |
127 | * we've to check PageTail before returning | |
128 | * what we just read. | |
936a5fe6 | 129 | */ |
22e5c47e AA |
130 | smp_rmb(); |
131 | if (PageTail(tail)) | |
132 | return reserved; | |
936a5fe6 AA |
133 | } |
134 | return PageReserved(tail); | |
fc5659c8 | 135 | } |
cbff90a7 BAY |
136 | |
137 | return true; | |
138 | } | |
139 | ||
bccf2150 AK |
140 | /* |
141 | * Switches to specified vcpu, until a matching vcpu_put() | |
142 | */ | |
313a3dc7 | 143 | void vcpu_load(struct kvm_vcpu *vcpu) |
6aa8b732 | 144 | { |
15ad7146 AK |
145 | int cpu; |
146 | ||
bccf2150 | 147 | mutex_lock(&vcpu->mutex); |
34bb10b7 RR |
148 | if (unlikely(vcpu->pid != current->pids[PIDTYPE_PID].pid)) { |
149 | /* The thread running this VCPU changed. */ | |
150 | struct pid *oldpid = vcpu->pid; | |
151 | struct pid *newpid = get_task_pid(current, PIDTYPE_PID); | |
152 | rcu_assign_pointer(vcpu->pid, newpid); | |
153 | synchronize_rcu(); | |
154 | put_pid(oldpid); | |
155 | } | |
15ad7146 AK |
156 | cpu = get_cpu(); |
157 | preempt_notifier_register(&vcpu->preempt_notifier); | |
313a3dc7 | 158 | kvm_arch_vcpu_load(vcpu, cpu); |
15ad7146 | 159 | put_cpu(); |
6aa8b732 AK |
160 | } |
161 | ||
313a3dc7 | 162 | void vcpu_put(struct kvm_vcpu *vcpu) |
6aa8b732 | 163 | { |
15ad7146 | 164 | preempt_disable(); |
313a3dc7 | 165 | kvm_arch_vcpu_put(vcpu); |
15ad7146 AK |
166 | preempt_notifier_unregister(&vcpu->preempt_notifier); |
167 | preempt_enable(); | |
6aa8b732 AK |
168 | mutex_unlock(&vcpu->mutex); |
169 | } | |
170 | ||
d9e368d6 AK |
171 | static void ack_flush(void *_completed) |
172 | { | |
d9e368d6 AK |
173 | } |
174 | ||
49846896 | 175 | static bool make_all_cpus_request(struct kvm *kvm, unsigned int req) |
d9e368d6 | 176 | { |
597a5f55 | 177 | int i, cpu, me; |
6ef7a1bc RR |
178 | cpumask_var_t cpus; |
179 | bool called = true; | |
d9e368d6 | 180 | struct kvm_vcpu *vcpu; |
d9e368d6 | 181 | |
79f55997 | 182 | zalloc_cpumask_var(&cpus, GFP_ATOMIC); |
6ef7a1bc | 183 | |
3cba4130 | 184 | me = get_cpu(); |
988a2cae | 185 | kvm_for_each_vcpu(i, vcpu, kvm) { |
3cba4130 | 186 | kvm_make_request(req, vcpu); |
d9e368d6 | 187 | cpu = vcpu->cpu; |
6b7e2d09 XG |
188 | |
189 | /* Set ->requests bit before we read ->mode */ | |
190 | smp_mb(); | |
191 | ||
192 | if (cpus != NULL && cpu != -1 && cpu != me && | |
193 | kvm_vcpu_exiting_guest_mode(vcpu) != OUTSIDE_GUEST_MODE) | |
6ef7a1bc | 194 | cpumask_set_cpu(cpu, cpus); |
49846896 | 195 | } |
6ef7a1bc RR |
196 | if (unlikely(cpus == NULL)) |
197 | smp_call_function_many(cpu_online_mask, ack_flush, NULL, 1); | |
198 | else if (!cpumask_empty(cpus)) | |
199 | smp_call_function_many(cpus, ack_flush, NULL, 1); | |
200 | else | |
201 | called = false; | |
3cba4130 | 202 | put_cpu(); |
6ef7a1bc | 203 | free_cpumask_var(cpus); |
49846896 | 204 | return called; |
d9e368d6 AK |
205 | } |
206 | ||
49846896 | 207 | void kvm_flush_remote_tlbs(struct kvm *kvm) |
2e53d63a | 208 | { |
bec87d6e | 209 | long dirty_count = kvm->tlbs_dirty; |
a4ee1ca4 XG |
210 | |
211 | smp_mb(); | |
49846896 RR |
212 | if (make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH)) |
213 | ++kvm->stat.remote_tlb_flush; | |
a4ee1ca4 | 214 | cmpxchg(&kvm->tlbs_dirty, dirty_count, 0); |
2e53d63a MT |
215 | } |
216 | ||
49846896 RR |
217 | void kvm_reload_remote_mmus(struct kvm *kvm) |
218 | { | |
219 | make_all_cpus_request(kvm, KVM_REQ_MMU_RELOAD); | |
220 | } | |
2e53d63a | 221 | |
fb3f0f51 RR |
222 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) |
223 | { | |
224 | struct page *page; | |
225 | int r; | |
226 | ||
227 | mutex_init(&vcpu->mutex); | |
228 | vcpu->cpu = -1; | |
fb3f0f51 RR |
229 | vcpu->kvm = kvm; |
230 | vcpu->vcpu_id = id; | |
34bb10b7 | 231 | vcpu->pid = NULL; |
b6958ce4 | 232 | init_waitqueue_head(&vcpu->wq); |
af585b92 | 233 | kvm_async_pf_vcpu_init(vcpu); |
fb3f0f51 RR |
234 | |
235 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
236 | if (!page) { | |
237 | r = -ENOMEM; | |
238 | goto fail; | |
239 | } | |
240 | vcpu->run = page_address(page); | |
241 | ||
4c088493 R |
242 | kvm_vcpu_set_in_spin_loop(vcpu, false); |
243 | kvm_vcpu_set_dy_eligible(vcpu, false); | |
244 | ||
e9b11c17 | 245 | r = kvm_arch_vcpu_init(vcpu); |
fb3f0f51 | 246 | if (r < 0) |
e9b11c17 | 247 | goto fail_free_run; |
fb3f0f51 RR |
248 | return 0; |
249 | ||
fb3f0f51 RR |
250 | fail_free_run: |
251 | free_page((unsigned long)vcpu->run); | |
252 | fail: | |
76fafa5e | 253 | return r; |
fb3f0f51 RR |
254 | } |
255 | EXPORT_SYMBOL_GPL(kvm_vcpu_init); | |
256 | ||
257 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) | |
258 | { | |
34bb10b7 | 259 | put_pid(vcpu->pid); |
e9b11c17 | 260 | kvm_arch_vcpu_uninit(vcpu); |
fb3f0f51 RR |
261 | free_page((unsigned long)vcpu->run); |
262 | } | |
263 | EXPORT_SYMBOL_GPL(kvm_vcpu_uninit); | |
264 | ||
e930bffe AA |
265 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
266 | static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn) | |
267 | { | |
268 | return container_of(mn, struct kvm, mmu_notifier); | |
269 | } | |
270 | ||
271 | static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn, | |
272 | struct mm_struct *mm, | |
273 | unsigned long address) | |
274 | { | |
275 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
bc6678a3 | 276 | int need_tlb_flush, idx; |
e930bffe AA |
277 | |
278 | /* | |
279 | * When ->invalidate_page runs, the linux pte has been zapped | |
280 | * already but the page is still allocated until | |
281 | * ->invalidate_page returns. So if we increase the sequence | |
282 | * here the kvm page fault will notice if the spte can't be | |
283 | * established because the page is going to be freed. If | |
284 | * instead the kvm page fault establishes the spte before | |
285 | * ->invalidate_page runs, kvm_unmap_hva will release it | |
286 | * before returning. | |
287 | * | |
288 | * The sequence increase only need to be seen at spin_unlock | |
289 | * time, and not at spin_lock time. | |
290 | * | |
291 | * Increasing the sequence after the spin_unlock would be | |
292 | * unsafe because the kvm page fault could then establish the | |
293 | * pte after kvm_unmap_hva returned, without noticing the page | |
294 | * is going to be freed. | |
295 | */ | |
bc6678a3 | 296 | idx = srcu_read_lock(&kvm->srcu); |
e930bffe | 297 | spin_lock(&kvm->mmu_lock); |
565f3be2 | 298 | |
e930bffe | 299 | kvm->mmu_notifier_seq++; |
a4ee1ca4 | 300 | need_tlb_flush = kvm_unmap_hva(kvm, address) | kvm->tlbs_dirty; |
e930bffe AA |
301 | /* we've to flush the tlb before the pages can be freed */ |
302 | if (need_tlb_flush) | |
303 | kvm_flush_remote_tlbs(kvm); | |
304 | ||
565f3be2 TY |
305 | spin_unlock(&kvm->mmu_lock); |
306 | srcu_read_unlock(&kvm->srcu, idx); | |
e930bffe AA |
307 | } |
308 | ||
3da0dd43 IE |
309 | static void kvm_mmu_notifier_change_pte(struct mmu_notifier *mn, |
310 | struct mm_struct *mm, | |
311 | unsigned long address, | |
312 | pte_t pte) | |
313 | { | |
314 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
bc6678a3 | 315 | int idx; |
3da0dd43 | 316 | |
bc6678a3 | 317 | idx = srcu_read_lock(&kvm->srcu); |
3da0dd43 IE |
318 | spin_lock(&kvm->mmu_lock); |
319 | kvm->mmu_notifier_seq++; | |
320 | kvm_set_spte_hva(kvm, address, pte); | |
321 | spin_unlock(&kvm->mmu_lock); | |
bc6678a3 | 322 | srcu_read_unlock(&kvm->srcu, idx); |
3da0dd43 IE |
323 | } |
324 | ||
e930bffe AA |
325 | static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, |
326 | struct mm_struct *mm, | |
327 | unsigned long start, | |
328 | unsigned long end) | |
329 | { | |
330 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
bc6678a3 | 331 | int need_tlb_flush = 0, idx; |
e930bffe | 332 | |
bc6678a3 | 333 | idx = srcu_read_lock(&kvm->srcu); |
e930bffe AA |
334 | spin_lock(&kvm->mmu_lock); |
335 | /* | |
336 | * The count increase must become visible at unlock time as no | |
337 | * spte can be established without taking the mmu_lock and | |
338 | * count is also read inside the mmu_lock critical section. | |
339 | */ | |
340 | kvm->mmu_notifier_count++; | |
b3ae2096 | 341 | need_tlb_flush = kvm_unmap_hva_range(kvm, start, end); |
a4ee1ca4 | 342 | need_tlb_flush |= kvm->tlbs_dirty; |
e930bffe AA |
343 | /* we've to flush the tlb before the pages can be freed */ |
344 | if (need_tlb_flush) | |
345 | kvm_flush_remote_tlbs(kvm); | |
565f3be2 TY |
346 | |
347 | spin_unlock(&kvm->mmu_lock); | |
348 | srcu_read_unlock(&kvm->srcu, idx); | |
e930bffe AA |
349 | } |
350 | ||
351 | static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn, | |
352 | struct mm_struct *mm, | |
353 | unsigned long start, | |
354 | unsigned long end) | |
355 | { | |
356 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
357 | ||
358 | spin_lock(&kvm->mmu_lock); | |
359 | /* | |
360 | * This sequence increase will notify the kvm page fault that | |
361 | * the page that is going to be mapped in the spte could have | |
362 | * been freed. | |
363 | */ | |
364 | kvm->mmu_notifier_seq++; | |
a355aa54 | 365 | smp_wmb(); |
e930bffe AA |
366 | /* |
367 | * The above sequence increase must be visible before the | |
a355aa54 PM |
368 | * below count decrease, which is ensured by the smp_wmb above |
369 | * in conjunction with the smp_rmb in mmu_notifier_retry(). | |
e930bffe AA |
370 | */ |
371 | kvm->mmu_notifier_count--; | |
372 | spin_unlock(&kvm->mmu_lock); | |
373 | ||
374 | BUG_ON(kvm->mmu_notifier_count < 0); | |
375 | } | |
376 | ||
377 | static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn, | |
378 | struct mm_struct *mm, | |
379 | unsigned long address) | |
380 | { | |
381 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
bc6678a3 | 382 | int young, idx; |
e930bffe | 383 | |
bc6678a3 | 384 | idx = srcu_read_lock(&kvm->srcu); |
e930bffe | 385 | spin_lock(&kvm->mmu_lock); |
e930bffe | 386 | |
565f3be2 | 387 | young = kvm_age_hva(kvm, address); |
e930bffe AA |
388 | if (young) |
389 | kvm_flush_remote_tlbs(kvm); | |
390 | ||
565f3be2 TY |
391 | spin_unlock(&kvm->mmu_lock); |
392 | srcu_read_unlock(&kvm->srcu, idx); | |
393 | ||
e930bffe AA |
394 | return young; |
395 | } | |
396 | ||
8ee53820 AA |
397 | static int kvm_mmu_notifier_test_young(struct mmu_notifier *mn, |
398 | struct mm_struct *mm, | |
399 | unsigned long address) | |
400 | { | |
401 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
402 | int young, idx; | |
403 | ||
404 | idx = srcu_read_lock(&kvm->srcu); | |
405 | spin_lock(&kvm->mmu_lock); | |
406 | young = kvm_test_age_hva(kvm, address); | |
407 | spin_unlock(&kvm->mmu_lock); | |
408 | srcu_read_unlock(&kvm->srcu, idx); | |
409 | ||
410 | return young; | |
411 | } | |
412 | ||
85db06e5 MT |
413 | static void kvm_mmu_notifier_release(struct mmu_notifier *mn, |
414 | struct mm_struct *mm) | |
415 | { | |
416 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
eda2beda LJ |
417 | int idx; |
418 | ||
419 | idx = srcu_read_lock(&kvm->srcu); | |
85db06e5 | 420 | kvm_arch_flush_shadow(kvm); |
eda2beda | 421 | srcu_read_unlock(&kvm->srcu, idx); |
85db06e5 MT |
422 | } |
423 | ||
e930bffe AA |
424 | static const struct mmu_notifier_ops kvm_mmu_notifier_ops = { |
425 | .invalidate_page = kvm_mmu_notifier_invalidate_page, | |
426 | .invalidate_range_start = kvm_mmu_notifier_invalidate_range_start, | |
427 | .invalidate_range_end = kvm_mmu_notifier_invalidate_range_end, | |
428 | .clear_flush_young = kvm_mmu_notifier_clear_flush_young, | |
8ee53820 | 429 | .test_young = kvm_mmu_notifier_test_young, |
3da0dd43 | 430 | .change_pte = kvm_mmu_notifier_change_pte, |
85db06e5 | 431 | .release = kvm_mmu_notifier_release, |
e930bffe | 432 | }; |
4c07b0a4 AK |
433 | |
434 | static int kvm_init_mmu_notifier(struct kvm *kvm) | |
435 | { | |
436 | kvm->mmu_notifier.ops = &kvm_mmu_notifier_ops; | |
437 | return mmu_notifier_register(&kvm->mmu_notifier, current->mm); | |
438 | } | |
439 | ||
440 | #else /* !(CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER) */ | |
441 | ||
442 | static int kvm_init_mmu_notifier(struct kvm *kvm) | |
443 | { | |
444 | return 0; | |
445 | } | |
446 | ||
e930bffe AA |
447 | #endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */ |
448 | ||
bf3e05bc XG |
449 | static void kvm_init_memslots_id(struct kvm *kvm) |
450 | { | |
451 | int i; | |
452 | struct kvm_memslots *slots = kvm->memslots; | |
453 | ||
454 | for (i = 0; i < KVM_MEM_SLOTS_NUM; i++) | |
f85e2cb5 | 455 | slots->id_to_index[i] = slots->memslots[i].id = i; |
bf3e05bc XG |
456 | } |
457 | ||
e08b9637 | 458 | static struct kvm *kvm_create_vm(unsigned long type) |
6aa8b732 | 459 | { |
d89f5eff JK |
460 | int r, i; |
461 | struct kvm *kvm = kvm_arch_alloc_vm(); | |
6aa8b732 | 462 | |
d89f5eff JK |
463 | if (!kvm) |
464 | return ERR_PTR(-ENOMEM); | |
465 | ||
e08b9637 | 466 | r = kvm_arch_init_vm(kvm, type); |
d89f5eff JK |
467 | if (r) |
468 | goto out_err_nodisable; | |
10474ae8 AG |
469 | |
470 | r = hardware_enable_all(); | |
471 | if (r) | |
472 | goto out_err_nodisable; | |
473 | ||
75858a84 AK |
474 | #ifdef CONFIG_HAVE_KVM_IRQCHIP |
475 | INIT_HLIST_HEAD(&kvm->mask_notifier_list); | |
136bdfee | 476 | INIT_HLIST_HEAD(&kvm->irq_ack_notifier_list); |
75858a84 | 477 | #endif |
6aa8b732 | 478 | |
46a26bf5 MT |
479 | r = -ENOMEM; |
480 | kvm->memslots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL); | |
481 | if (!kvm->memslots) | |
57e7fbee | 482 | goto out_err_nosrcu; |
bf3e05bc | 483 | kvm_init_memslots_id(kvm); |
bc6678a3 | 484 | if (init_srcu_struct(&kvm->srcu)) |
57e7fbee | 485 | goto out_err_nosrcu; |
e93f8a0f MT |
486 | for (i = 0; i < KVM_NR_BUSES; i++) { |
487 | kvm->buses[i] = kzalloc(sizeof(struct kvm_io_bus), | |
488 | GFP_KERNEL); | |
57e7fbee | 489 | if (!kvm->buses[i]) |
e93f8a0f | 490 | goto out_err; |
e93f8a0f | 491 | } |
e930bffe | 492 | |
74b5c5bf | 493 | spin_lock_init(&kvm->mmu_lock); |
6d4e4c4f AK |
494 | kvm->mm = current->mm; |
495 | atomic_inc(&kvm->mm->mm_count); | |
d34e6b17 | 496 | kvm_eventfd_init(kvm); |
11ec2804 | 497 | mutex_init(&kvm->lock); |
60eead79 | 498 | mutex_init(&kvm->irq_lock); |
79fac95e | 499 | mutex_init(&kvm->slots_lock); |
d39f13b0 | 500 | atomic_set(&kvm->users_count, 1); |
74b5c5bf MW |
501 | |
502 | r = kvm_init_mmu_notifier(kvm); | |
503 | if (r) | |
504 | goto out_err; | |
505 | ||
e935b837 | 506 | raw_spin_lock(&kvm_lock); |
5e58cfe4 | 507 | list_add(&kvm->vm_list, &vm_list); |
e935b837 | 508 | raw_spin_unlock(&kvm_lock); |
d89f5eff | 509 | |
f17abe9a | 510 | return kvm; |
10474ae8 AG |
511 | |
512 | out_err: | |
57e7fbee JK |
513 | cleanup_srcu_struct(&kvm->srcu); |
514 | out_err_nosrcu: | |
10474ae8 AG |
515 | hardware_disable_all(); |
516 | out_err_nodisable: | |
e93f8a0f MT |
517 | for (i = 0; i < KVM_NR_BUSES; i++) |
518 | kfree(kvm->buses[i]); | |
46a26bf5 | 519 | kfree(kvm->memslots); |
d89f5eff | 520 | kvm_arch_free_vm(kvm); |
10474ae8 | 521 | return ERR_PTR(r); |
f17abe9a AK |
522 | } |
523 | ||
92eca8fa TY |
524 | /* |
525 | * Avoid using vmalloc for a small buffer. | |
526 | * Should not be used when the size is statically known. | |
527 | */ | |
c1a7b32a | 528 | void *kvm_kvzalloc(unsigned long size) |
92eca8fa TY |
529 | { |
530 | if (size > PAGE_SIZE) | |
531 | return vzalloc(size); | |
532 | else | |
533 | return kzalloc(size, GFP_KERNEL); | |
534 | } | |
535 | ||
c1a7b32a | 536 | void kvm_kvfree(const void *addr) |
92eca8fa TY |
537 | { |
538 | if (is_vmalloc_addr(addr)) | |
539 | vfree(addr); | |
540 | else | |
541 | kfree(addr); | |
542 | } | |
543 | ||
a36a57b1 TY |
544 | static void kvm_destroy_dirty_bitmap(struct kvm_memory_slot *memslot) |
545 | { | |
546 | if (!memslot->dirty_bitmap) | |
547 | return; | |
548 | ||
92eca8fa | 549 | kvm_kvfree(memslot->dirty_bitmap); |
a36a57b1 TY |
550 | memslot->dirty_bitmap = NULL; |
551 | } | |
552 | ||
6aa8b732 AK |
553 | /* |
554 | * Free any memory in @free but not in @dont. | |
555 | */ | |
556 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, | |
557 | struct kvm_memory_slot *dont) | |
558 | { | |
290fc38d IE |
559 | if (!dont || free->rmap != dont->rmap) |
560 | vfree(free->rmap); | |
6aa8b732 AK |
561 | |
562 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) | |
a36a57b1 | 563 | kvm_destroy_dirty_bitmap(free); |
6aa8b732 | 564 | |
db3fe4eb | 565 | kvm_arch_free_memslot(free, dont); |
05da4558 | 566 | |
6aa8b732 | 567 | free->npages = 0; |
8d4e1288 | 568 | free->rmap = NULL; |
6aa8b732 AK |
569 | } |
570 | ||
d19a9cd2 | 571 | void kvm_free_physmem(struct kvm *kvm) |
6aa8b732 | 572 | { |
46a26bf5 | 573 | struct kvm_memslots *slots = kvm->memslots; |
be6ba0f0 | 574 | struct kvm_memory_slot *memslot; |
46a26bf5 | 575 | |
be6ba0f0 XG |
576 | kvm_for_each_memslot(memslot, slots) |
577 | kvm_free_physmem_slot(memslot, NULL); | |
6aa8b732 | 578 | |
46a26bf5 | 579 | kfree(kvm->memslots); |
6aa8b732 AK |
580 | } |
581 | ||
f17abe9a AK |
582 | static void kvm_destroy_vm(struct kvm *kvm) |
583 | { | |
e93f8a0f | 584 | int i; |
6d4e4c4f AK |
585 | struct mm_struct *mm = kvm->mm; |
586 | ||
ad8ba2cd | 587 | kvm_arch_sync_events(kvm); |
e935b837 | 588 | raw_spin_lock(&kvm_lock); |
133de902 | 589 | list_del(&kvm->vm_list); |
e935b837 | 590 | raw_spin_unlock(&kvm_lock); |
399ec807 | 591 | kvm_free_irq_routing(kvm); |
e93f8a0f MT |
592 | for (i = 0; i < KVM_NR_BUSES; i++) |
593 | kvm_io_bus_destroy(kvm->buses[i]); | |
980da6ce | 594 | kvm_coalesced_mmio_free(kvm); |
e930bffe AA |
595 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
596 | mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm); | |
f00be0ca GN |
597 | #else |
598 | kvm_arch_flush_shadow(kvm); | |
5f94c174 | 599 | #endif |
d19a9cd2 | 600 | kvm_arch_destroy_vm(kvm); |
d89f5eff JK |
601 | kvm_free_physmem(kvm); |
602 | cleanup_srcu_struct(&kvm->srcu); | |
603 | kvm_arch_free_vm(kvm); | |
10474ae8 | 604 | hardware_disable_all(); |
6d4e4c4f | 605 | mmdrop(mm); |
f17abe9a AK |
606 | } |
607 | ||
d39f13b0 IE |
608 | void kvm_get_kvm(struct kvm *kvm) |
609 | { | |
610 | atomic_inc(&kvm->users_count); | |
611 | } | |
612 | EXPORT_SYMBOL_GPL(kvm_get_kvm); | |
613 | ||
614 | void kvm_put_kvm(struct kvm *kvm) | |
615 | { | |
616 | if (atomic_dec_and_test(&kvm->users_count)) | |
617 | kvm_destroy_vm(kvm); | |
618 | } | |
619 | EXPORT_SYMBOL_GPL(kvm_put_kvm); | |
620 | ||
621 | ||
f17abe9a AK |
622 | static int kvm_vm_release(struct inode *inode, struct file *filp) |
623 | { | |
624 | struct kvm *kvm = filp->private_data; | |
625 | ||
721eecbf GH |
626 | kvm_irqfd_release(kvm); |
627 | ||
d39f13b0 | 628 | kvm_put_kvm(kvm); |
6aa8b732 AK |
629 | return 0; |
630 | } | |
631 | ||
515a0127 TY |
632 | /* |
633 | * Allocation size is twice as large as the actual dirty bitmap size. | |
93474b25 | 634 | * See x86's kvm_vm_ioctl_get_dirty_log() why this is needed. |
515a0127 | 635 | */ |
a36a57b1 TY |
636 | static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot) |
637 | { | |
189a2f7b | 638 | #ifndef CONFIG_S390 |
515a0127 | 639 | unsigned long dirty_bytes = 2 * kvm_dirty_bitmap_bytes(memslot); |
a36a57b1 | 640 | |
92eca8fa | 641 | memslot->dirty_bitmap = kvm_kvzalloc(dirty_bytes); |
a36a57b1 TY |
642 | if (!memslot->dirty_bitmap) |
643 | return -ENOMEM; | |
644 | ||
189a2f7b | 645 | #endif /* !CONFIG_S390 */ |
a36a57b1 TY |
646 | return 0; |
647 | } | |
648 | ||
bf3e05bc XG |
649 | static int cmp_memslot(const void *slot1, const void *slot2) |
650 | { | |
651 | struct kvm_memory_slot *s1, *s2; | |
652 | ||
653 | s1 = (struct kvm_memory_slot *)slot1; | |
654 | s2 = (struct kvm_memory_slot *)slot2; | |
655 | ||
656 | if (s1->npages < s2->npages) | |
657 | return 1; | |
658 | if (s1->npages > s2->npages) | |
659 | return -1; | |
660 | ||
661 | return 0; | |
662 | } | |
663 | ||
664 | /* | |
665 | * Sort the memslots base on its size, so the larger slots | |
666 | * will get better fit. | |
667 | */ | |
668 | static void sort_memslots(struct kvm_memslots *slots) | |
669 | { | |
f85e2cb5 XG |
670 | int i; |
671 | ||
bf3e05bc XG |
672 | sort(slots->memslots, KVM_MEM_SLOTS_NUM, |
673 | sizeof(struct kvm_memory_slot), cmp_memslot, NULL); | |
f85e2cb5 XG |
674 | |
675 | for (i = 0; i < KVM_MEM_SLOTS_NUM; i++) | |
676 | slots->id_to_index[slots->memslots[i].id] = i; | |
bf3e05bc XG |
677 | } |
678 | ||
be593d62 XG |
679 | void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new) |
680 | { | |
681 | if (new) { | |
682 | int id = new->id; | |
28a37544 | 683 | struct kvm_memory_slot *old = id_to_memslot(slots, id); |
bf3e05bc | 684 | unsigned long npages = old->npages; |
be593d62 | 685 | |
28a37544 | 686 | *old = *new; |
bf3e05bc XG |
687 | if (new->npages != npages) |
688 | sort_memslots(slots); | |
be593d62 XG |
689 | } |
690 | ||
691 | slots->generation++; | |
692 | } | |
693 | ||
6aa8b732 AK |
694 | /* |
695 | * Allocate some memory and give it an address in the guest physical address | |
696 | * space. | |
697 | * | |
698 | * Discontiguous memory is allowed, mostly for framebuffers. | |
f78e0e2e | 699 | * |
10589a46 | 700 | * Must be called holding mmap_sem for write. |
6aa8b732 | 701 | */ |
f78e0e2e SY |
702 | int __kvm_set_memory_region(struct kvm *kvm, |
703 | struct kvm_userspace_memory_region *mem, | |
704 | int user_alloc) | |
6aa8b732 | 705 | { |
8234b22e | 706 | int r; |
6aa8b732 | 707 | gfn_t base_gfn; |
28bcb112 HC |
708 | unsigned long npages; |
709 | unsigned long i; | |
6aa8b732 AK |
710 | struct kvm_memory_slot *memslot; |
711 | struct kvm_memory_slot old, new; | |
bc6678a3 | 712 | struct kvm_memslots *slots, *old_memslots; |
6aa8b732 AK |
713 | |
714 | r = -EINVAL; | |
715 | /* General sanity checks */ | |
716 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
717 | goto out; | |
718 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) | |
719 | goto out; | |
fa3d315a TY |
720 | /* We can read the guest memory with __xxx_user() later on. */ |
721 | if (user_alloc && | |
722 | ((mem->userspace_addr & (PAGE_SIZE - 1)) || | |
9e3bb6b6 HC |
723 | !access_ok(VERIFY_WRITE, |
724 | (void __user *)(unsigned long)mem->userspace_addr, | |
725 | mem->memory_size))) | |
78749809 | 726 | goto out; |
93a5cef0 | 727 | if (mem->slot >= KVM_MEM_SLOTS_NUM) |
6aa8b732 AK |
728 | goto out; |
729 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) | |
730 | goto out; | |
731 | ||
28a37544 | 732 | memslot = id_to_memslot(kvm->memslots, mem->slot); |
6aa8b732 AK |
733 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; |
734 | npages = mem->memory_size >> PAGE_SHIFT; | |
735 | ||
660c22c4 TY |
736 | r = -EINVAL; |
737 | if (npages > KVM_MEM_MAX_NR_PAGES) | |
738 | goto out; | |
739 | ||
6aa8b732 AK |
740 | if (!npages) |
741 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; | |
742 | ||
6aa8b732 AK |
743 | new = old = *memslot; |
744 | ||
e36d96f7 | 745 | new.id = mem->slot; |
6aa8b732 AK |
746 | new.base_gfn = base_gfn; |
747 | new.npages = npages; | |
748 | new.flags = mem->flags; | |
749 | ||
750 | /* Disallow changing a memory slot's size. */ | |
751 | r = -EINVAL; | |
752 | if (npages && old.npages && npages != old.npages) | |
f78e0e2e | 753 | goto out_free; |
6aa8b732 AK |
754 | |
755 | /* Check for overlaps */ | |
756 | r = -EEXIST; | |
757 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
46a26bf5 | 758 | struct kvm_memory_slot *s = &kvm->memslots->memslots[i]; |
6aa8b732 | 759 | |
4cd481f6 | 760 | if (s == memslot || !s->npages) |
6aa8b732 AK |
761 | continue; |
762 | if (!((base_gfn + npages <= s->base_gfn) || | |
763 | (base_gfn >= s->base_gfn + s->npages))) | |
f78e0e2e | 764 | goto out_free; |
6aa8b732 | 765 | } |
6aa8b732 | 766 | |
6aa8b732 AK |
767 | /* Free page dirty bitmap if unneeded */ |
768 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8b6d44c7 | 769 | new.dirty_bitmap = NULL; |
6aa8b732 AK |
770 | |
771 | r = -ENOMEM; | |
772 | ||
773 | /* Allocate if a slot is being created */ | |
189a2f7b TY |
774 | if (npages && !old.npages) { |
775 | new.user_alloc = user_alloc; | |
776 | new.userspace_addr = mem->userspace_addr; | |
eff0114a | 777 | #ifndef CONFIG_S390 |
26535037 | 778 | new.rmap = vzalloc(npages * sizeof(*new.rmap)); |
290fc38d | 779 | if (!new.rmap) |
f78e0e2e | 780 | goto out_free; |
189a2f7b | 781 | #endif /* not defined CONFIG_S390 */ |
db3fe4eb TY |
782 | if (kvm_arch_create_memslot(&new, npages)) |
783 | goto out_free; | |
6aa8b732 | 784 | } |
ec04b260 | 785 | |
6aa8b732 AK |
786 | /* Allocate page dirty bitmap if needed */ |
787 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { | |
a36a57b1 | 788 | if (kvm_create_dirty_bitmap(&new) < 0) |
f78e0e2e | 789 | goto out_free; |
bc6678a3 | 790 | /* destroy any largepage mappings for dirty tracking */ |
6aa8b732 AK |
791 | } |
792 | ||
bc6678a3 | 793 | if (!npages) { |
28a37544 XG |
794 | struct kvm_memory_slot *slot; |
795 | ||
bc6678a3 | 796 | r = -ENOMEM; |
6da64fdb TM |
797 | slots = kmemdup(kvm->memslots, sizeof(struct kvm_memslots), |
798 | GFP_KERNEL); | |
bc6678a3 MT |
799 | if (!slots) |
800 | goto out_free; | |
28a37544 XG |
801 | slot = id_to_memslot(slots, mem->slot); |
802 | slot->flags |= KVM_MEMSLOT_INVALID; | |
803 | ||
be593d62 | 804 | update_memslots(slots, NULL); |
bc6678a3 MT |
805 | |
806 | old_memslots = kvm->memslots; | |
807 | rcu_assign_pointer(kvm->memslots, slots); | |
808 | synchronize_srcu_expedited(&kvm->srcu); | |
809 | /* From this point no new shadow pages pointing to a deleted | |
810 | * memslot will be created. | |
811 | * | |
812 | * validation of sp->gfn happens in: | |
813 | * - gfn_to_hva (kvm_read_guest, gfn_to_pfn) | |
814 | * - kvm_is_visible_gfn (mmu_check_roots) | |
815 | */ | |
34d4cb8f | 816 | kvm_arch_flush_shadow(kvm); |
bc6678a3 MT |
817 | kfree(old_memslots); |
818 | } | |
34d4cb8f | 819 | |
f7784b8e MT |
820 | r = kvm_arch_prepare_memory_region(kvm, &new, old, mem, user_alloc); |
821 | if (r) | |
822 | goto out_free; | |
823 | ||
32f6daad | 824 | /* map/unmap the pages in iommu page table */ |
bc6678a3 MT |
825 | if (npages) { |
826 | r = kvm_iommu_map_pages(kvm, &new); | |
827 | if (r) | |
828 | goto out_free; | |
32f6daad AW |
829 | } else |
830 | kvm_iommu_unmap_pages(kvm, &old); | |
604b38ac | 831 | |
bc6678a3 | 832 | r = -ENOMEM; |
6da64fdb TM |
833 | slots = kmemdup(kvm->memslots, sizeof(struct kvm_memslots), |
834 | GFP_KERNEL); | |
bc6678a3 MT |
835 | if (!slots) |
836 | goto out_free; | |
bc6678a3 MT |
837 | |
838 | /* actual memory is freed via old in kvm_free_physmem_slot below */ | |
839 | if (!npages) { | |
840 | new.rmap = NULL; | |
841 | new.dirty_bitmap = NULL; | |
db3fe4eb | 842 | memset(&new.arch, 0, sizeof(new.arch)); |
bc6678a3 MT |
843 | } |
844 | ||
be593d62 | 845 | update_memslots(slots, &new); |
bc6678a3 MT |
846 | old_memslots = kvm->memslots; |
847 | rcu_assign_pointer(kvm->memslots, slots); | |
848 | synchronize_srcu_expedited(&kvm->srcu); | |
3ad82a7e | 849 | |
f7784b8e | 850 | kvm_arch_commit_memory_region(kvm, mem, old, user_alloc); |
82ce2c96 | 851 | |
ce88decf XG |
852 | /* |
853 | * If the new memory slot is created, we need to clear all | |
854 | * mmio sptes. | |
855 | */ | |
856 | if (npages && old.base_gfn != mem->guest_phys_addr >> PAGE_SHIFT) | |
857 | kvm_arch_flush_shadow(kvm); | |
858 | ||
bc6678a3 MT |
859 | kvm_free_physmem_slot(&old, &new); |
860 | kfree(old_memslots); | |
861 | ||
6aa8b732 AK |
862 | return 0; |
863 | ||
f78e0e2e | 864 | out_free: |
6aa8b732 AK |
865 | kvm_free_physmem_slot(&new, &old); |
866 | out: | |
867 | return r; | |
210c7c4d IE |
868 | |
869 | } | |
f78e0e2e SY |
870 | EXPORT_SYMBOL_GPL(__kvm_set_memory_region); |
871 | ||
872 | int kvm_set_memory_region(struct kvm *kvm, | |
873 | struct kvm_userspace_memory_region *mem, | |
874 | int user_alloc) | |
875 | { | |
876 | int r; | |
877 | ||
79fac95e | 878 | mutex_lock(&kvm->slots_lock); |
f78e0e2e | 879 | r = __kvm_set_memory_region(kvm, mem, user_alloc); |
79fac95e | 880 | mutex_unlock(&kvm->slots_lock); |
f78e0e2e SY |
881 | return r; |
882 | } | |
210c7c4d IE |
883 | EXPORT_SYMBOL_GPL(kvm_set_memory_region); |
884 | ||
1fe779f8 CO |
885 | int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
886 | struct | |
887 | kvm_userspace_memory_region *mem, | |
888 | int user_alloc) | |
210c7c4d | 889 | { |
e0d62c7f IE |
890 | if (mem->slot >= KVM_MEMORY_SLOTS) |
891 | return -EINVAL; | |
210c7c4d | 892 | return kvm_set_memory_region(kvm, mem, user_alloc); |
6aa8b732 AK |
893 | } |
894 | ||
5bb064dc ZX |
895 | int kvm_get_dirty_log(struct kvm *kvm, |
896 | struct kvm_dirty_log *log, int *is_dirty) | |
6aa8b732 AK |
897 | { |
898 | struct kvm_memory_slot *memslot; | |
899 | int r, i; | |
87bf6e7d | 900 | unsigned long n; |
6aa8b732 AK |
901 | unsigned long any = 0; |
902 | ||
6aa8b732 AK |
903 | r = -EINVAL; |
904 | if (log->slot >= KVM_MEMORY_SLOTS) | |
905 | goto out; | |
906 | ||
28a37544 | 907 | memslot = id_to_memslot(kvm->memslots, log->slot); |
6aa8b732 AK |
908 | r = -ENOENT; |
909 | if (!memslot->dirty_bitmap) | |
910 | goto out; | |
911 | ||
87bf6e7d | 912 | n = kvm_dirty_bitmap_bytes(memslot); |
6aa8b732 | 913 | |
cd1a4a98 | 914 | for (i = 0; !any && i < n/sizeof(long); ++i) |
6aa8b732 AK |
915 | any = memslot->dirty_bitmap[i]; |
916 | ||
917 | r = -EFAULT; | |
918 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
919 | goto out; | |
920 | ||
5bb064dc ZX |
921 | if (any) |
922 | *is_dirty = 1; | |
6aa8b732 AK |
923 | |
924 | r = 0; | |
6aa8b732 | 925 | out: |
6aa8b732 AK |
926 | return r; |
927 | } | |
928 | ||
db3fe4eb TY |
929 | bool kvm_largepages_enabled(void) |
930 | { | |
931 | return largepages_enabled; | |
932 | } | |
933 | ||
54dee993 MT |
934 | void kvm_disable_largepages(void) |
935 | { | |
936 | largepages_enabled = false; | |
937 | } | |
938 | EXPORT_SYMBOL_GPL(kvm_disable_largepages); | |
939 | ||
cea7bb21 IE |
940 | int is_error_page(struct page *page) |
941 | { | |
edba23e5 | 942 | return page == bad_page || page == hwpoison_page || page == fault_page; |
cea7bb21 IE |
943 | } |
944 | EXPORT_SYMBOL_GPL(is_error_page); | |
945 | ||
35149e21 AL |
946 | int is_error_pfn(pfn_t pfn) |
947 | { | |
edba23e5 | 948 | return pfn == bad_pfn || pfn == hwpoison_pfn || pfn == fault_pfn; |
35149e21 AL |
949 | } |
950 | EXPORT_SYMBOL_GPL(is_error_pfn); | |
951 | ||
bf998156 HY |
952 | int is_hwpoison_pfn(pfn_t pfn) |
953 | { | |
954 | return pfn == hwpoison_pfn; | |
955 | } | |
956 | EXPORT_SYMBOL_GPL(is_hwpoison_pfn); | |
957 | ||
fce92dce XG |
958 | int is_noslot_pfn(pfn_t pfn) |
959 | { | |
960 | return pfn == bad_pfn; | |
961 | } | |
962 | EXPORT_SYMBOL_GPL(is_noslot_pfn); | |
963 | ||
964 | int is_invalid_pfn(pfn_t pfn) | |
965 | { | |
966 | return pfn == hwpoison_pfn || pfn == fault_pfn; | |
967 | } | |
968 | EXPORT_SYMBOL_GPL(is_invalid_pfn); | |
969 | ||
f9d46eb0 IE |
970 | static inline unsigned long bad_hva(void) |
971 | { | |
972 | return PAGE_OFFSET; | |
973 | } | |
974 | ||
975 | int kvm_is_error_hva(unsigned long addr) | |
976 | { | |
977 | return addr == bad_hva(); | |
978 | } | |
979 | EXPORT_SYMBOL_GPL(kvm_is_error_hva); | |
980 | ||
49c7754c GN |
981 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) |
982 | { | |
983 | return __gfn_to_memslot(kvm_memslots(kvm), gfn); | |
984 | } | |
a1f4d395 | 985 | EXPORT_SYMBOL_GPL(gfn_to_memslot); |
6aa8b732 | 986 | |
e0d62c7f IE |
987 | int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn) |
988 | { | |
bf3e05bc | 989 | struct kvm_memory_slot *memslot = gfn_to_memslot(kvm, gfn); |
e0d62c7f | 990 | |
bf3e05bc XG |
991 | if (!memslot || memslot->id >= KVM_MEMORY_SLOTS || |
992 | memslot->flags & KVM_MEMSLOT_INVALID) | |
993 | return 0; | |
e0d62c7f | 994 | |
bf3e05bc | 995 | return 1; |
e0d62c7f IE |
996 | } |
997 | EXPORT_SYMBOL_GPL(kvm_is_visible_gfn); | |
998 | ||
8f0b1ab6 JR |
999 | unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn) |
1000 | { | |
1001 | struct vm_area_struct *vma; | |
1002 | unsigned long addr, size; | |
1003 | ||
1004 | size = PAGE_SIZE; | |
1005 | ||
1006 | addr = gfn_to_hva(kvm, gfn); | |
1007 | if (kvm_is_error_hva(addr)) | |
1008 | return PAGE_SIZE; | |
1009 | ||
1010 | down_read(¤t->mm->mmap_sem); | |
1011 | vma = find_vma(current->mm, addr); | |
1012 | if (!vma) | |
1013 | goto out; | |
1014 | ||
1015 | size = vma_kernel_pagesize(vma); | |
1016 | ||
1017 | out: | |
1018 | up_read(¤t->mm->mmap_sem); | |
1019 | ||
1020 | return size; | |
1021 | } | |
1022 | ||
49c7754c | 1023 | static unsigned long gfn_to_hva_many(struct kvm_memory_slot *slot, gfn_t gfn, |
48987781 | 1024 | gfn_t *nr_pages) |
539cb660 | 1025 | { |
bc6678a3 | 1026 | if (!slot || slot->flags & KVM_MEMSLOT_INVALID) |
539cb660 | 1027 | return bad_hva(); |
48987781 XG |
1028 | |
1029 | if (nr_pages) | |
1030 | *nr_pages = slot->npages - (gfn - slot->base_gfn); | |
1031 | ||
f5c98031 | 1032 | return gfn_to_hva_memslot(slot, gfn); |
539cb660 | 1033 | } |
48987781 XG |
1034 | |
1035 | unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn) | |
1036 | { | |
49c7754c | 1037 | return gfn_to_hva_many(gfn_to_memslot(kvm, gfn), gfn, NULL); |
48987781 | 1038 | } |
0d150298 | 1039 | EXPORT_SYMBOL_GPL(gfn_to_hva); |
539cb660 | 1040 | |
903816fa | 1041 | pfn_t get_fault_pfn(void) |
8030089f GN |
1042 | { |
1043 | get_page(fault_page); | |
1044 | return fault_pfn; | |
1045 | } | |
903816fa | 1046 | EXPORT_SYMBOL_GPL(get_fault_pfn); |
8030089f | 1047 | |
0857b9e9 GN |
1048 | int get_user_page_nowait(struct task_struct *tsk, struct mm_struct *mm, |
1049 | unsigned long start, int write, struct page **page) | |
1050 | { | |
1051 | int flags = FOLL_TOUCH | FOLL_NOWAIT | FOLL_HWPOISON | FOLL_GET; | |
1052 | ||
1053 | if (write) | |
1054 | flags |= FOLL_WRITE; | |
1055 | ||
1056 | return __get_user_pages(tsk, mm, start, 1, flags, page, NULL, NULL); | |
1057 | } | |
1058 | ||
fafc3dba HY |
1059 | static inline int check_user_page_hwpoison(unsigned long addr) |
1060 | { | |
1061 | int rc, flags = FOLL_TOUCH | FOLL_HWPOISON | FOLL_WRITE; | |
1062 | ||
1063 | rc = __get_user_pages(current, current->mm, addr, 1, | |
1064 | flags, NULL, NULL, NULL); | |
1065 | return rc == -EHWPOISON; | |
1066 | } | |
1067 | ||
d5661048 XG |
1068 | static pfn_t hva_to_pfn(unsigned long addr, bool atomic, bool *async, |
1069 | bool write_fault, bool *writable) | |
954bbbc2 | 1070 | { |
8d4e1288 | 1071 | struct page *page[1]; |
af585b92 | 1072 | int npages = 0; |
2e2e3738 | 1073 | pfn_t pfn; |
954bbbc2 | 1074 | |
af585b92 GN |
1075 | /* we can do it either atomically or asynchronously, not both */ |
1076 | BUG_ON(atomic && async); | |
1077 | ||
612819c3 MT |
1078 | BUG_ON(!write_fault && !writable); |
1079 | ||
1080 | if (writable) | |
1081 | *writable = true; | |
1082 | ||
af585b92 | 1083 | if (atomic || async) |
887c08ac | 1084 | npages = __get_user_pages_fast(addr, 1, 1, page); |
af585b92 GN |
1085 | |
1086 | if (unlikely(npages != 1) && !atomic) { | |
887c08ac | 1087 | might_sleep(); |
612819c3 MT |
1088 | |
1089 | if (writable) | |
1090 | *writable = write_fault; | |
1091 | ||
0857b9e9 GN |
1092 | if (async) { |
1093 | down_read(¤t->mm->mmap_sem); | |
1094 | npages = get_user_page_nowait(current, current->mm, | |
1095 | addr, write_fault, page); | |
1096 | up_read(¤t->mm->mmap_sem); | |
1097 | } else | |
1098 | npages = get_user_pages_fast(addr, 1, write_fault, | |
1099 | page); | |
612819c3 MT |
1100 | |
1101 | /* map read fault as writable if possible */ | |
1102 | if (unlikely(!write_fault) && npages == 1) { | |
1103 | struct page *wpage[1]; | |
1104 | ||
1105 | npages = __get_user_pages_fast(addr, 1, 1, wpage); | |
1106 | if (npages == 1) { | |
1107 | *writable = true; | |
1108 | put_page(page[0]); | |
1109 | page[0] = wpage[0]; | |
1110 | } | |
1111 | npages = 1; | |
1112 | } | |
887c08ac | 1113 | } |
539cb660 | 1114 | |
2e2e3738 AL |
1115 | if (unlikely(npages != 1)) { |
1116 | struct vm_area_struct *vma; | |
1117 | ||
887c08ac | 1118 | if (atomic) |
8030089f | 1119 | return get_fault_pfn(); |
887c08ac | 1120 | |
bbeb3406 | 1121 | down_read(¤t->mm->mmap_sem); |
0857b9e9 GN |
1122 | if (npages == -EHWPOISON || |
1123 | (!async && check_user_page_hwpoison(addr))) { | |
bbeb3406 | 1124 | up_read(¤t->mm->mmap_sem); |
bf998156 HY |
1125 | get_page(hwpoison_page); |
1126 | return page_to_pfn(hwpoison_page); | |
1127 | } | |
1128 | ||
8030089f | 1129 | vma = find_vma_intersection(current->mm, addr, addr+1); |
4c2155ce | 1130 | |
8030089f GN |
1131 | if (vma == NULL) |
1132 | pfn = get_fault_pfn(); | |
1133 | else if ((vma->vm_flags & VM_PFNMAP)) { | |
1134 | pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) + | |
1135 | vma->vm_pgoff; | |
1136 | BUG_ON(!kvm_is_mmio_pfn(pfn)); | |
1137 | } else { | |
1138 | if (async && (vma->vm_flags & VM_WRITE)) | |
af585b92 | 1139 | *async = true; |
8030089f | 1140 | pfn = get_fault_pfn(); |
2e2e3738 | 1141 | } |
4c2155ce | 1142 | up_read(¤t->mm->mmap_sem); |
2e2e3738 AL |
1143 | } else |
1144 | pfn = page_to_pfn(page[0]); | |
8d4e1288 | 1145 | |
2e2e3738 | 1146 | return pfn; |
35149e21 AL |
1147 | } |
1148 | ||
d5661048 | 1149 | pfn_t hva_to_pfn_atomic(unsigned long addr) |
887c08ac | 1150 | { |
d5661048 | 1151 | return hva_to_pfn(addr, true, NULL, true, NULL); |
887c08ac XG |
1152 | } |
1153 | EXPORT_SYMBOL_GPL(hva_to_pfn_atomic); | |
1154 | ||
612819c3 MT |
1155 | static pfn_t __gfn_to_pfn(struct kvm *kvm, gfn_t gfn, bool atomic, bool *async, |
1156 | bool write_fault, bool *writable) | |
506f0d6f MT |
1157 | { |
1158 | unsigned long addr; | |
1159 | ||
af585b92 GN |
1160 | if (async) |
1161 | *async = false; | |
1162 | ||
506f0d6f MT |
1163 | addr = gfn_to_hva(kvm, gfn); |
1164 | if (kvm_is_error_hva(addr)) { | |
1165 | get_page(bad_page); | |
1166 | return page_to_pfn(bad_page); | |
1167 | } | |
1168 | ||
d5661048 | 1169 | return hva_to_pfn(addr, atomic, async, write_fault, writable); |
365fb3fd XG |
1170 | } |
1171 | ||
1172 | pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn) | |
1173 | { | |
612819c3 | 1174 | return __gfn_to_pfn(kvm, gfn, true, NULL, true, NULL); |
365fb3fd XG |
1175 | } |
1176 | EXPORT_SYMBOL_GPL(gfn_to_pfn_atomic); | |
1177 | ||
612819c3 MT |
1178 | pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async, |
1179 | bool write_fault, bool *writable) | |
af585b92 | 1180 | { |
612819c3 | 1181 | return __gfn_to_pfn(kvm, gfn, false, async, write_fault, writable); |
af585b92 GN |
1182 | } |
1183 | EXPORT_SYMBOL_GPL(gfn_to_pfn_async); | |
1184 | ||
365fb3fd XG |
1185 | pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn) |
1186 | { | |
612819c3 | 1187 | return __gfn_to_pfn(kvm, gfn, false, NULL, true, NULL); |
506f0d6f | 1188 | } |
35149e21 AL |
1189 | EXPORT_SYMBOL_GPL(gfn_to_pfn); |
1190 | ||
612819c3 MT |
1191 | pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault, |
1192 | bool *writable) | |
1193 | { | |
1194 | return __gfn_to_pfn(kvm, gfn, false, NULL, write_fault, writable); | |
1195 | } | |
1196 | EXPORT_SYMBOL_GPL(gfn_to_pfn_prot); | |
1197 | ||
d5661048 | 1198 | pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn) |
506f0d6f MT |
1199 | { |
1200 | unsigned long addr = gfn_to_hva_memslot(slot, gfn); | |
d5661048 | 1201 | return hva_to_pfn(addr, false, NULL, true, NULL); |
506f0d6f MT |
1202 | } |
1203 | ||
48987781 XG |
1204 | int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages, |
1205 | int nr_pages) | |
1206 | { | |
1207 | unsigned long addr; | |
1208 | gfn_t entry; | |
1209 | ||
49c7754c | 1210 | addr = gfn_to_hva_many(gfn_to_memslot(kvm, gfn), gfn, &entry); |
48987781 XG |
1211 | if (kvm_is_error_hva(addr)) |
1212 | return -1; | |
1213 | ||
1214 | if (entry < nr_pages) | |
1215 | return 0; | |
1216 | ||
1217 | return __get_user_pages_fast(addr, nr_pages, 1, pages); | |
1218 | } | |
1219 | EXPORT_SYMBOL_GPL(gfn_to_page_many_atomic); | |
1220 | ||
35149e21 AL |
1221 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) |
1222 | { | |
2e2e3738 AL |
1223 | pfn_t pfn; |
1224 | ||
1225 | pfn = gfn_to_pfn(kvm, gfn); | |
c77fb9dc | 1226 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 AL |
1227 | return pfn_to_page(pfn); |
1228 | ||
c77fb9dc | 1229 | WARN_ON(kvm_is_mmio_pfn(pfn)); |
2e2e3738 AL |
1230 | |
1231 | get_page(bad_page); | |
1232 | return bad_page; | |
954bbbc2 | 1233 | } |
aab61cc0 | 1234 | |
954bbbc2 AK |
1235 | EXPORT_SYMBOL_GPL(gfn_to_page); |
1236 | ||
b4231d61 IE |
1237 | void kvm_release_page_clean(struct page *page) |
1238 | { | |
35149e21 | 1239 | kvm_release_pfn_clean(page_to_pfn(page)); |
b4231d61 IE |
1240 | } |
1241 | EXPORT_SYMBOL_GPL(kvm_release_page_clean); | |
1242 | ||
35149e21 AL |
1243 | void kvm_release_pfn_clean(pfn_t pfn) |
1244 | { | |
c77fb9dc | 1245 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 | 1246 | put_page(pfn_to_page(pfn)); |
35149e21 AL |
1247 | } |
1248 | EXPORT_SYMBOL_GPL(kvm_release_pfn_clean); | |
1249 | ||
b4231d61 | 1250 | void kvm_release_page_dirty(struct page *page) |
8a7ae055 | 1251 | { |
35149e21 AL |
1252 | kvm_release_pfn_dirty(page_to_pfn(page)); |
1253 | } | |
1254 | EXPORT_SYMBOL_GPL(kvm_release_page_dirty); | |
1255 | ||
1256 | void kvm_release_pfn_dirty(pfn_t pfn) | |
1257 | { | |
1258 | kvm_set_pfn_dirty(pfn); | |
1259 | kvm_release_pfn_clean(pfn); | |
1260 | } | |
1261 | EXPORT_SYMBOL_GPL(kvm_release_pfn_dirty); | |
1262 | ||
1263 | void kvm_set_page_dirty(struct page *page) | |
1264 | { | |
1265 | kvm_set_pfn_dirty(page_to_pfn(page)); | |
1266 | } | |
1267 | EXPORT_SYMBOL_GPL(kvm_set_page_dirty); | |
1268 | ||
1269 | void kvm_set_pfn_dirty(pfn_t pfn) | |
1270 | { | |
c77fb9dc | 1271 | if (!kvm_is_mmio_pfn(pfn)) { |
2e2e3738 AL |
1272 | struct page *page = pfn_to_page(pfn); |
1273 | if (!PageReserved(page)) | |
1274 | SetPageDirty(page); | |
1275 | } | |
8a7ae055 | 1276 | } |
35149e21 AL |
1277 | EXPORT_SYMBOL_GPL(kvm_set_pfn_dirty); |
1278 | ||
1279 | void kvm_set_pfn_accessed(pfn_t pfn) | |
1280 | { | |
c77fb9dc | 1281 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 | 1282 | mark_page_accessed(pfn_to_page(pfn)); |
35149e21 AL |
1283 | } |
1284 | EXPORT_SYMBOL_GPL(kvm_set_pfn_accessed); | |
1285 | ||
1286 | void kvm_get_pfn(pfn_t pfn) | |
1287 | { | |
c77fb9dc | 1288 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 | 1289 | get_page(pfn_to_page(pfn)); |
35149e21 AL |
1290 | } |
1291 | EXPORT_SYMBOL_GPL(kvm_get_pfn); | |
8a7ae055 | 1292 | |
195aefde IE |
1293 | static int next_segment(unsigned long len, int offset) |
1294 | { | |
1295 | if (len > PAGE_SIZE - offset) | |
1296 | return PAGE_SIZE - offset; | |
1297 | else | |
1298 | return len; | |
1299 | } | |
1300 | ||
1301 | int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, | |
1302 | int len) | |
1303 | { | |
e0506bcb IE |
1304 | int r; |
1305 | unsigned long addr; | |
195aefde | 1306 | |
e0506bcb IE |
1307 | addr = gfn_to_hva(kvm, gfn); |
1308 | if (kvm_is_error_hva(addr)) | |
1309 | return -EFAULT; | |
fa3d315a | 1310 | r = __copy_from_user(data, (void __user *)addr + offset, len); |
e0506bcb | 1311 | if (r) |
195aefde | 1312 | return -EFAULT; |
195aefde IE |
1313 | return 0; |
1314 | } | |
1315 | EXPORT_SYMBOL_GPL(kvm_read_guest_page); | |
1316 | ||
1317 | int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len) | |
1318 | { | |
1319 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1320 | int seg; | |
1321 | int offset = offset_in_page(gpa); | |
1322 | int ret; | |
1323 | ||
1324 | while ((seg = next_segment(len, offset)) != 0) { | |
1325 | ret = kvm_read_guest_page(kvm, gfn, data, offset, seg); | |
1326 | if (ret < 0) | |
1327 | return ret; | |
1328 | offset = 0; | |
1329 | len -= seg; | |
1330 | data += seg; | |
1331 | ++gfn; | |
1332 | } | |
1333 | return 0; | |
1334 | } | |
1335 | EXPORT_SYMBOL_GPL(kvm_read_guest); | |
1336 | ||
7ec54588 MT |
1337 | int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, |
1338 | unsigned long len) | |
1339 | { | |
1340 | int r; | |
1341 | unsigned long addr; | |
1342 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1343 | int offset = offset_in_page(gpa); | |
1344 | ||
1345 | addr = gfn_to_hva(kvm, gfn); | |
1346 | if (kvm_is_error_hva(addr)) | |
1347 | return -EFAULT; | |
0aac03f0 | 1348 | pagefault_disable(); |
7ec54588 | 1349 | r = __copy_from_user_inatomic(data, (void __user *)addr + offset, len); |
0aac03f0 | 1350 | pagefault_enable(); |
7ec54588 MT |
1351 | if (r) |
1352 | return -EFAULT; | |
1353 | return 0; | |
1354 | } | |
1355 | EXPORT_SYMBOL(kvm_read_guest_atomic); | |
1356 | ||
195aefde IE |
1357 | int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, |
1358 | int offset, int len) | |
1359 | { | |
e0506bcb IE |
1360 | int r; |
1361 | unsigned long addr; | |
195aefde | 1362 | |
e0506bcb IE |
1363 | addr = gfn_to_hva(kvm, gfn); |
1364 | if (kvm_is_error_hva(addr)) | |
1365 | return -EFAULT; | |
8b0cedff | 1366 | r = __copy_to_user((void __user *)addr + offset, data, len); |
e0506bcb | 1367 | if (r) |
195aefde | 1368 | return -EFAULT; |
195aefde IE |
1369 | mark_page_dirty(kvm, gfn); |
1370 | return 0; | |
1371 | } | |
1372 | EXPORT_SYMBOL_GPL(kvm_write_guest_page); | |
1373 | ||
1374 | int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, | |
1375 | unsigned long len) | |
1376 | { | |
1377 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1378 | int seg; | |
1379 | int offset = offset_in_page(gpa); | |
1380 | int ret; | |
1381 | ||
1382 | while ((seg = next_segment(len, offset)) != 0) { | |
1383 | ret = kvm_write_guest_page(kvm, gfn, data, offset, seg); | |
1384 | if (ret < 0) | |
1385 | return ret; | |
1386 | offset = 0; | |
1387 | len -= seg; | |
1388 | data += seg; | |
1389 | ++gfn; | |
1390 | } | |
1391 | return 0; | |
1392 | } | |
1393 | ||
49c7754c GN |
1394 | int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
1395 | gpa_t gpa) | |
1396 | { | |
1397 | struct kvm_memslots *slots = kvm_memslots(kvm); | |
1398 | int offset = offset_in_page(gpa); | |
1399 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1400 | ||
1401 | ghc->gpa = gpa; | |
1402 | ghc->generation = slots->generation; | |
9d4cba7f | 1403 | ghc->memslot = gfn_to_memslot(kvm, gfn); |
49c7754c GN |
1404 | ghc->hva = gfn_to_hva_many(ghc->memslot, gfn, NULL); |
1405 | if (!kvm_is_error_hva(ghc->hva)) | |
1406 | ghc->hva += offset; | |
1407 | else | |
1408 | return -EFAULT; | |
1409 | ||
1410 | return 0; | |
1411 | } | |
1412 | EXPORT_SYMBOL_GPL(kvm_gfn_to_hva_cache_init); | |
1413 | ||
1414 | int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, | |
1415 | void *data, unsigned long len) | |
1416 | { | |
1417 | struct kvm_memslots *slots = kvm_memslots(kvm); | |
1418 | int r; | |
1419 | ||
1420 | if (slots->generation != ghc->generation) | |
1421 | kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa); | |
1422 | ||
1423 | if (kvm_is_error_hva(ghc->hva)) | |
1424 | return -EFAULT; | |
1425 | ||
8b0cedff | 1426 | r = __copy_to_user((void __user *)ghc->hva, data, len); |
49c7754c GN |
1427 | if (r) |
1428 | return -EFAULT; | |
1429 | mark_page_dirty_in_slot(kvm, ghc->memslot, ghc->gpa >> PAGE_SHIFT); | |
1430 | ||
1431 | return 0; | |
1432 | } | |
1433 | EXPORT_SYMBOL_GPL(kvm_write_guest_cached); | |
1434 | ||
e03b644f GN |
1435 | int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
1436 | void *data, unsigned long len) | |
1437 | { | |
1438 | struct kvm_memslots *slots = kvm_memslots(kvm); | |
1439 | int r; | |
1440 | ||
1441 | if (slots->generation != ghc->generation) | |
1442 | kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa); | |
1443 | ||
1444 | if (kvm_is_error_hva(ghc->hva)) | |
1445 | return -EFAULT; | |
1446 | ||
1447 | r = __copy_from_user(data, (void __user *)ghc->hva, len); | |
1448 | if (r) | |
1449 | return -EFAULT; | |
1450 | ||
1451 | return 0; | |
1452 | } | |
1453 | EXPORT_SYMBOL_GPL(kvm_read_guest_cached); | |
1454 | ||
195aefde IE |
1455 | int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len) |
1456 | { | |
3bcc8a8c HC |
1457 | return kvm_write_guest_page(kvm, gfn, (const void *) empty_zero_page, |
1458 | offset, len); | |
195aefde IE |
1459 | } |
1460 | EXPORT_SYMBOL_GPL(kvm_clear_guest_page); | |
1461 | ||
1462 | int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len) | |
1463 | { | |
1464 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1465 | int seg; | |
1466 | int offset = offset_in_page(gpa); | |
1467 | int ret; | |
1468 | ||
1469 | while ((seg = next_segment(len, offset)) != 0) { | |
1470 | ret = kvm_clear_guest_page(kvm, gfn, offset, seg); | |
1471 | if (ret < 0) | |
1472 | return ret; | |
1473 | offset = 0; | |
1474 | len -= seg; | |
1475 | ++gfn; | |
1476 | } | |
1477 | return 0; | |
1478 | } | |
1479 | EXPORT_SYMBOL_GPL(kvm_clear_guest); | |
1480 | ||
49c7754c GN |
1481 | void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot, |
1482 | gfn_t gfn) | |
6aa8b732 | 1483 | { |
7e9d619d RR |
1484 | if (memslot && memslot->dirty_bitmap) { |
1485 | unsigned long rel_gfn = gfn - memslot->base_gfn; | |
6aa8b732 | 1486 | |
93474b25 TY |
1487 | /* TODO: introduce set_bit_le() and use it */ |
1488 | test_and_set_bit_le(rel_gfn, memslot->dirty_bitmap); | |
6aa8b732 AK |
1489 | } |
1490 | } | |
1491 | ||
49c7754c GN |
1492 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
1493 | { | |
1494 | struct kvm_memory_slot *memslot; | |
1495 | ||
1496 | memslot = gfn_to_memslot(kvm, gfn); | |
1497 | mark_page_dirty_in_slot(kvm, memslot, gfn); | |
1498 | } | |
1499 | ||
b6958ce4 ED |
1500 | /* |
1501 | * The vCPU has executed a HLT instruction with in-kernel mode enabled. | |
1502 | */ | |
8776e519 | 1503 | void kvm_vcpu_block(struct kvm_vcpu *vcpu) |
d3bef15f | 1504 | { |
e5c239cf MT |
1505 | DEFINE_WAIT(wait); |
1506 | ||
1507 | for (;;) { | |
1508 | prepare_to_wait(&vcpu->wq, &wait, TASK_INTERRUPTIBLE); | |
1509 | ||
a1b37100 | 1510 | if (kvm_arch_vcpu_runnable(vcpu)) { |
a8eeb04a | 1511 | kvm_make_request(KVM_REQ_UNHALT, vcpu); |
e5c239cf | 1512 | break; |
d7690175 | 1513 | } |
09cec754 GN |
1514 | if (kvm_cpu_has_pending_timer(vcpu)) |
1515 | break; | |
e5c239cf MT |
1516 | if (signal_pending(current)) |
1517 | break; | |
1518 | ||
b6958ce4 | 1519 | schedule(); |
b6958ce4 | 1520 | } |
d3bef15f | 1521 | |
e5c239cf | 1522 | finish_wait(&vcpu->wq, &wait); |
b6958ce4 ED |
1523 | } |
1524 | ||
8c84780d | 1525 | #ifndef CONFIG_S390 |
b6d33834 CD |
1526 | /* |
1527 | * Kick a sleeping VCPU, or a guest VCPU in guest mode, into host kernel mode. | |
1528 | */ | |
1529 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) | |
1530 | { | |
1531 | int me; | |
1532 | int cpu = vcpu->cpu; | |
1533 | wait_queue_head_t *wqp; | |
1534 | ||
1535 | wqp = kvm_arch_vcpu_wq(vcpu); | |
1536 | if (waitqueue_active(wqp)) { | |
1537 | wake_up_interruptible(wqp); | |
1538 | ++vcpu->stat.halt_wakeup; | |
1539 | } | |
1540 | ||
1541 | me = get_cpu(); | |
1542 | if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) | |
1543 | if (kvm_arch_vcpu_should_kick(vcpu)) | |
1544 | smp_send_reschedule(cpu); | |
1545 | put_cpu(); | |
1546 | } | |
8c84780d | 1547 | #endif /* !CONFIG_S390 */ |
b6d33834 | 1548 | |
6aa8b732 AK |
1549 | void kvm_resched(struct kvm_vcpu *vcpu) |
1550 | { | |
3fca0365 YD |
1551 | if (!need_resched()) |
1552 | return; | |
6aa8b732 | 1553 | cond_resched(); |
6aa8b732 AK |
1554 | } |
1555 | EXPORT_SYMBOL_GPL(kvm_resched); | |
1556 | ||
41628d33 KW |
1557 | bool kvm_vcpu_yield_to(struct kvm_vcpu *target) |
1558 | { | |
1559 | struct pid *pid; | |
1560 | struct task_struct *task = NULL; | |
1561 | ||
1562 | rcu_read_lock(); | |
1563 | pid = rcu_dereference(target->pid); | |
1564 | if (pid) | |
1565 | task = get_pid_task(target->pid, PIDTYPE_PID); | |
1566 | rcu_read_unlock(); | |
1567 | if (!task) | |
1568 | return false; | |
1569 | if (task->flags & PF_VCPU) { | |
1570 | put_task_struct(task); | |
1571 | return false; | |
1572 | } | |
1573 | if (yield_to(task, 1)) { | |
1574 | put_task_struct(task); | |
1575 | return true; | |
1576 | } | |
1577 | put_task_struct(task); | |
1578 | return false; | |
1579 | } | |
1580 | EXPORT_SYMBOL_GPL(kvm_vcpu_yield_to); | |
1581 | ||
06e48c51 R |
1582 | #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT |
1583 | /* | |
1584 | * Helper that checks whether a VCPU is eligible for directed yield. | |
1585 | * Most eligible candidate to yield is decided by following heuristics: | |
1586 | * | |
1587 | * (a) VCPU which has not done pl-exit or cpu relax intercepted recently | |
1588 | * (preempted lock holder), indicated by @in_spin_loop. | |
1589 | * Set at the beiginning and cleared at the end of interception/PLE handler. | |
1590 | * | |
1591 | * (b) VCPU which has done pl-exit/ cpu relax intercepted but did not get | |
1592 | * chance last time (mostly it has become eligible now since we have probably | |
1593 | * yielded to lockholder in last iteration. This is done by toggling | |
1594 | * @dy_eligible each time a VCPU checked for eligibility.) | |
1595 | * | |
1596 | * Yielding to a recently pl-exited/cpu relax intercepted VCPU before yielding | |
1597 | * to preempted lock-holder could result in wrong VCPU selection and CPU | |
1598 | * burning. Giving priority for a potential lock-holder increases lock | |
1599 | * progress. | |
1600 | * | |
1601 | * Since algorithm is based on heuristics, accessing another VCPU data without | |
1602 | * locking does not harm. It may result in trying to yield to same VCPU, fail | |
1603 | * and continue with next VCPU and so on. | |
1604 | */ | |
1605 | bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu) | |
1606 | { | |
1607 | bool eligible; | |
1608 | ||
1609 | eligible = !vcpu->spin_loop.in_spin_loop || | |
1610 | (vcpu->spin_loop.in_spin_loop && | |
1611 | vcpu->spin_loop.dy_eligible); | |
1612 | ||
1613 | if (vcpu->spin_loop.in_spin_loop) | |
1614 | kvm_vcpu_set_dy_eligible(vcpu, !vcpu->spin_loop.dy_eligible); | |
1615 | ||
1616 | return eligible; | |
1617 | } | |
1618 | #endif | |
217ece61 | 1619 | void kvm_vcpu_on_spin(struct kvm_vcpu *me) |
d255f4f2 | 1620 | { |
217ece61 RR |
1621 | struct kvm *kvm = me->kvm; |
1622 | struct kvm_vcpu *vcpu; | |
1623 | int last_boosted_vcpu = me->kvm->last_boosted_vcpu; | |
1624 | int yielded = 0; | |
1625 | int pass; | |
1626 | int i; | |
d255f4f2 | 1627 | |
4c088493 | 1628 | kvm_vcpu_set_in_spin_loop(me, true); |
217ece61 RR |
1629 | /* |
1630 | * We boost the priority of a VCPU that is runnable but not | |
1631 | * currently running, because it got preempted by something | |
1632 | * else and called schedule in __vcpu_run. Hopefully that | |
1633 | * VCPU is holding the lock that we need and will release it. | |
1634 | * We approximate round-robin by starting at the last boosted VCPU. | |
1635 | */ | |
1636 | for (pass = 0; pass < 2 && !yielded; pass++) { | |
1637 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
5cfc2aab | 1638 | if (!pass && i <= last_boosted_vcpu) { |
217ece61 RR |
1639 | i = last_boosted_vcpu; |
1640 | continue; | |
1641 | } else if (pass && i > last_boosted_vcpu) | |
1642 | break; | |
1643 | if (vcpu == me) | |
1644 | continue; | |
1645 | if (waitqueue_active(&vcpu->wq)) | |
1646 | continue; | |
06e48c51 R |
1647 | if (!kvm_vcpu_eligible_for_directed_yield(vcpu)) |
1648 | continue; | |
41628d33 | 1649 | if (kvm_vcpu_yield_to(vcpu)) { |
217ece61 RR |
1650 | kvm->last_boosted_vcpu = i; |
1651 | yielded = 1; | |
1652 | break; | |
1653 | } | |
217ece61 RR |
1654 | } |
1655 | } | |
4c088493 | 1656 | kvm_vcpu_set_in_spin_loop(me, false); |
06e48c51 R |
1657 | |
1658 | /* Ensure vcpu is not eligible during next spinloop */ | |
1659 | kvm_vcpu_set_dy_eligible(me, false); | |
d255f4f2 ZE |
1660 | } |
1661 | EXPORT_SYMBOL_GPL(kvm_vcpu_on_spin); | |
1662 | ||
e4a533a4 | 1663 | static int kvm_vcpu_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
9a2bb7f4 AK |
1664 | { |
1665 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; | |
9a2bb7f4 AK |
1666 | struct page *page; |
1667 | ||
e4a533a4 | 1668 | if (vmf->pgoff == 0) |
039576c0 | 1669 | page = virt_to_page(vcpu->run); |
09566765 | 1670 | #ifdef CONFIG_X86 |
e4a533a4 | 1671 | else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET) |
ad312c7c | 1672 | page = virt_to_page(vcpu->arch.pio_data); |
5f94c174 LV |
1673 | #endif |
1674 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
1675 | else if (vmf->pgoff == KVM_COALESCED_MMIO_PAGE_OFFSET) | |
1676 | page = virt_to_page(vcpu->kvm->coalesced_mmio_ring); | |
09566765 | 1677 | #endif |
039576c0 | 1678 | else |
5b1c1493 | 1679 | return kvm_arch_vcpu_fault(vcpu, vmf); |
9a2bb7f4 | 1680 | get_page(page); |
e4a533a4 | 1681 | vmf->page = page; |
1682 | return 0; | |
9a2bb7f4 AK |
1683 | } |
1684 | ||
f0f37e2f | 1685 | static const struct vm_operations_struct kvm_vcpu_vm_ops = { |
e4a533a4 | 1686 | .fault = kvm_vcpu_fault, |
9a2bb7f4 AK |
1687 | }; |
1688 | ||
1689 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) | |
1690 | { | |
1691 | vma->vm_ops = &kvm_vcpu_vm_ops; | |
1692 | return 0; | |
1693 | } | |
1694 | ||
bccf2150 AK |
1695 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
1696 | { | |
1697 | struct kvm_vcpu *vcpu = filp->private_data; | |
1698 | ||
66c0b394 | 1699 | kvm_put_kvm(vcpu->kvm); |
bccf2150 AK |
1700 | return 0; |
1701 | } | |
1702 | ||
3d3aab1b | 1703 | static struct file_operations kvm_vcpu_fops = { |
bccf2150 AK |
1704 | .release = kvm_vcpu_release, |
1705 | .unlocked_ioctl = kvm_vcpu_ioctl, | |
1dda606c AG |
1706 | #ifdef CONFIG_COMPAT |
1707 | .compat_ioctl = kvm_vcpu_compat_ioctl, | |
1708 | #endif | |
9a2bb7f4 | 1709 | .mmap = kvm_vcpu_mmap, |
6038f373 | 1710 | .llseek = noop_llseek, |
bccf2150 AK |
1711 | }; |
1712 | ||
1713 | /* | |
1714 | * Allocates an inode for the vcpu. | |
1715 | */ | |
1716 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) | |
1717 | { | |
628ff7c1 | 1718 | return anon_inode_getfd("kvm-vcpu", &kvm_vcpu_fops, vcpu, O_RDWR); |
bccf2150 AK |
1719 | } |
1720 | ||
c5ea7660 AK |
1721 | /* |
1722 | * Creates some virtual cpus. Good luck creating more than one. | |
1723 | */ | |
73880c80 | 1724 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id) |
c5ea7660 AK |
1725 | { |
1726 | int r; | |
988a2cae | 1727 | struct kvm_vcpu *vcpu, *v; |
c5ea7660 | 1728 | |
73880c80 | 1729 | vcpu = kvm_arch_vcpu_create(kvm, id); |
fb3f0f51 RR |
1730 | if (IS_ERR(vcpu)) |
1731 | return PTR_ERR(vcpu); | |
c5ea7660 | 1732 | |
15ad7146 AK |
1733 | preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops); |
1734 | ||
26e5215f AK |
1735 | r = kvm_arch_vcpu_setup(vcpu); |
1736 | if (r) | |
d780592b | 1737 | goto vcpu_destroy; |
26e5215f | 1738 | |
11ec2804 | 1739 | mutex_lock(&kvm->lock); |
3e515705 AK |
1740 | if (!kvm_vcpu_compatible(vcpu)) { |
1741 | r = -EINVAL; | |
1742 | goto unlock_vcpu_destroy; | |
1743 | } | |
73880c80 GN |
1744 | if (atomic_read(&kvm->online_vcpus) == KVM_MAX_VCPUS) { |
1745 | r = -EINVAL; | |
d780592b | 1746 | goto unlock_vcpu_destroy; |
fb3f0f51 | 1747 | } |
73880c80 | 1748 | |
988a2cae GN |
1749 | kvm_for_each_vcpu(r, v, kvm) |
1750 | if (v->vcpu_id == id) { | |
73880c80 | 1751 | r = -EEXIST; |
d780592b | 1752 | goto unlock_vcpu_destroy; |
73880c80 GN |
1753 | } |
1754 | ||
1755 | BUG_ON(kvm->vcpus[atomic_read(&kvm->online_vcpus)]); | |
c5ea7660 | 1756 | |
fb3f0f51 | 1757 | /* Now it's all set up, let userspace reach it */ |
66c0b394 | 1758 | kvm_get_kvm(kvm); |
bccf2150 | 1759 | r = create_vcpu_fd(vcpu); |
73880c80 GN |
1760 | if (r < 0) { |
1761 | kvm_put_kvm(kvm); | |
d780592b | 1762 | goto unlock_vcpu_destroy; |
73880c80 GN |
1763 | } |
1764 | ||
1765 | kvm->vcpus[atomic_read(&kvm->online_vcpus)] = vcpu; | |
1766 | smp_wmb(); | |
1767 | atomic_inc(&kvm->online_vcpus); | |
1768 | ||
73880c80 | 1769 | mutex_unlock(&kvm->lock); |
fb3f0f51 | 1770 | return r; |
39c3b86e | 1771 | |
d780592b | 1772 | unlock_vcpu_destroy: |
7d8fece6 | 1773 | mutex_unlock(&kvm->lock); |
d780592b | 1774 | vcpu_destroy: |
d40ccc62 | 1775 | kvm_arch_vcpu_destroy(vcpu); |
c5ea7660 AK |
1776 | return r; |
1777 | } | |
1778 | ||
1961d276 AK |
1779 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
1780 | { | |
1781 | if (sigset) { | |
1782 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1783 | vcpu->sigset_active = 1; | |
1784 | vcpu->sigset = *sigset; | |
1785 | } else | |
1786 | vcpu->sigset_active = 0; | |
1787 | return 0; | |
1788 | } | |
1789 | ||
bccf2150 AK |
1790 | static long kvm_vcpu_ioctl(struct file *filp, |
1791 | unsigned int ioctl, unsigned long arg) | |
6aa8b732 | 1792 | { |
bccf2150 | 1793 | struct kvm_vcpu *vcpu = filp->private_data; |
2f366987 | 1794 | void __user *argp = (void __user *)arg; |
313a3dc7 | 1795 | int r; |
fa3795a7 DH |
1796 | struct kvm_fpu *fpu = NULL; |
1797 | struct kvm_sregs *kvm_sregs = NULL; | |
6aa8b732 | 1798 | |
6d4e4c4f AK |
1799 | if (vcpu->kvm->mm != current->mm) |
1800 | return -EIO; | |
2122ff5e AK |
1801 | |
1802 | #if defined(CONFIG_S390) || defined(CONFIG_PPC) | |
1803 | /* | |
1804 | * Special cases: vcpu ioctls that are asynchronous to vcpu execution, | |
1805 | * so vcpu_load() would break it. | |
1806 | */ | |
1807 | if (ioctl == KVM_S390_INTERRUPT || ioctl == KVM_INTERRUPT) | |
1808 | return kvm_arch_vcpu_ioctl(filp, ioctl, arg); | |
1809 | #endif | |
1810 | ||
1811 | ||
1812 | vcpu_load(vcpu); | |
6aa8b732 | 1813 | switch (ioctl) { |
9a2bb7f4 | 1814 | case KVM_RUN: |
f0fe5108 AK |
1815 | r = -EINVAL; |
1816 | if (arg) | |
1817 | goto out; | |
b6c7a5dc | 1818 | r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run); |
64be5007 | 1819 | trace_kvm_userspace_exit(vcpu->run->exit_reason, r); |
6aa8b732 | 1820 | break; |
6aa8b732 | 1821 | case KVM_GET_REGS: { |
3e4bb3ac | 1822 | struct kvm_regs *kvm_regs; |
6aa8b732 | 1823 | |
3e4bb3ac XZ |
1824 | r = -ENOMEM; |
1825 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); | |
1826 | if (!kvm_regs) | |
6aa8b732 | 1827 | goto out; |
3e4bb3ac XZ |
1828 | r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs); |
1829 | if (r) | |
1830 | goto out_free1; | |
6aa8b732 | 1831 | r = -EFAULT; |
3e4bb3ac XZ |
1832 | if (copy_to_user(argp, kvm_regs, sizeof(struct kvm_regs))) |
1833 | goto out_free1; | |
6aa8b732 | 1834 | r = 0; |
3e4bb3ac XZ |
1835 | out_free1: |
1836 | kfree(kvm_regs); | |
6aa8b732 AK |
1837 | break; |
1838 | } | |
1839 | case KVM_SET_REGS: { | |
3e4bb3ac | 1840 | struct kvm_regs *kvm_regs; |
6aa8b732 | 1841 | |
3e4bb3ac | 1842 | r = -ENOMEM; |
ff5c2c03 SL |
1843 | kvm_regs = memdup_user(argp, sizeof(*kvm_regs)); |
1844 | if (IS_ERR(kvm_regs)) { | |
1845 | r = PTR_ERR(kvm_regs); | |
6aa8b732 | 1846 | goto out; |
ff5c2c03 | 1847 | } |
3e4bb3ac | 1848 | r = kvm_arch_vcpu_ioctl_set_regs(vcpu, kvm_regs); |
6aa8b732 | 1849 | if (r) |
3e4bb3ac | 1850 | goto out_free2; |
6aa8b732 | 1851 | r = 0; |
3e4bb3ac XZ |
1852 | out_free2: |
1853 | kfree(kvm_regs); | |
6aa8b732 AK |
1854 | break; |
1855 | } | |
1856 | case KVM_GET_SREGS: { | |
fa3795a7 DH |
1857 | kvm_sregs = kzalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
1858 | r = -ENOMEM; | |
1859 | if (!kvm_sregs) | |
1860 | goto out; | |
1861 | r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs); | |
6aa8b732 AK |
1862 | if (r) |
1863 | goto out; | |
1864 | r = -EFAULT; | |
fa3795a7 | 1865 | if (copy_to_user(argp, kvm_sregs, sizeof(struct kvm_sregs))) |
6aa8b732 AK |
1866 | goto out; |
1867 | r = 0; | |
1868 | break; | |
1869 | } | |
1870 | case KVM_SET_SREGS: { | |
ff5c2c03 SL |
1871 | kvm_sregs = memdup_user(argp, sizeof(*kvm_sregs)); |
1872 | if (IS_ERR(kvm_sregs)) { | |
1873 | r = PTR_ERR(kvm_sregs); | |
6aa8b732 | 1874 | goto out; |
ff5c2c03 | 1875 | } |
fa3795a7 | 1876 | r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs); |
6aa8b732 AK |
1877 | if (r) |
1878 | goto out; | |
1879 | r = 0; | |
1880 | break; | |
1881 | } | |
62d9f0db MT |
1882 | case KVM_GET_MP_STATE: { |
1883 | struct kvm_mp_state mp_state; | |
1884 | ||
1885 | r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state); | |
1886 | if (r) | |
1887 | goto out; | |
1888 | r = -EFAULT; | |
1889 | if (copy_to_user(argp, &mp_state, sizeof mp_state)) | |
1890 | goto out; | |
1891 | r = 0; | |
1892 | break; | |
1893 | } | |
1894 | case KVM_SET_MP_STATE: { | |
1895 | struct kvm_mp_state mp_state; | |
1896 | ||
1897 | r = -EFAULT; | |
1898 | if (copy_from_user(&mp_state, argp, sizeof mp_state)) | |
1899 | goto out; | |
1900 | r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state); | |
1901 | if (r) | |
1902 | goto out; | |
1903 | r = 0; | |
1904 | break; | |
1905 | } | |
6aa8b732 AK |
1906 | case KVM_TRANSLATE: { |
1907 | struct kvm_translation tr; | |
1908 | ||
1909 | r = -EFAULT; | |
2f366987 | 1910 | if (copy_from_user(&tr, argp, sizeof tr)) |
6aa8b732 | 1911 | goto out; |
8b006791 | 1912 | r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr); |
6aa8b732 AK |
1913 | if (r) |
1914 | goto out; | |
1915 | r = -EFAULT; | |
2f366987 | 1916 | if (copy_to_user(argp, &tr, sizeof tr)) |
6aa8b732 AK |
1917 | goto out; |
1918 | r = 0; | |
1919 | break; | |
1920 | } | |
d0bfb940 JK |
1921 | case KVM_SET_GUEST_DEBUG: { |
1922 | struct kvm_guest_debug dbg; | |
6aa8b732 AK |
1923 | |
1924 | r = -EFAULT; | |
2f366987 | 1925 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
6aa8b732 | 1926 | goto out; |
d0bfb940 | 1927 | r = kvm_arch_vcpu_ioctl_set_guest_debug(vcpu, &dbg); |
6aa8b732 AK |
1928 | if (r) |
1929 | goto out; | |
1930 | r = 0; | |
1931 | break; | |
1932 | } | |
1961d276 AK |
1933 | case KVM_SET_SIGNAL_MASK: { |
1934 | struct kvm_signal_mask __user *sigmask_arg = argp; | |
1935 | struct kvm_signal_mask kvm_sigmask; | |
1936 | sigset_t sigset, *p; | |
1937 | ||
1938 | p = NULL; | |
1939 | if (argp) { | |
1940 | r = -EFAULT; | |
1941 | if (copy_from_user(&kvm_sigmask, argp, | |
1942 | sizeof kvm_sigmask)) | |
1943 | goto out; | |
1944 | r = -EINVAL; | |
1945 | if (kvm_sigmask.len != sizeof sigset) | |
1946 | goto out; | |
1947 | r = -EFAULT; | |
1948 | if (copy_from_user(&sigset, sigmask_arg->sigset, | |
1949 | sizeof sigset)) | |
1950 | goto out; | |
1951 | p = &sigset; | |
1952 | } | |
376d41ff | 1953 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, p); |
1961d276 AK |
1954 | break; |
1955 | } | |
b8836737 | 1956 | case KVM_GET_FPU: { |
fa3795a7 DH |
1957 | fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
1958 | r = -ENOMEM; | |
1959 | if (!fpu) | |
1960 | goto out; | |
1961 | r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, fpu); | |
b8836737 AK |
1962 | if (r) |
1963 | goto out; | |
1964 | r = -EFAULT; | |
fa3795a7 | 1965 | if (copy_to_user(argp, fpu, sizeof(struct kvm_fpu))) |
b8836737 AK |
1966 | goto out; |
1967 | r = 0; | |
1968 | break; | |
1969 | } | |
1970 | case KVM_SET_FPU: { | |
ff5c2c03 SL |
1971 | fpu = memdup_user(argp, sizeof(*fpu)); |
1972 | if (IS_ERR(fpu)) { | |
1973 | r = PTR_ERR(fpu); | |
b8836737 | 1974 | goto out; |
ff5c2c03 | 1975 | } |
fa3795a7 | 1976 | r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu); |
b8836737 AK |
1977 | if (r) |
1978 | goto out; | |
1979 | r = 0; | |
1980 | break; | |
1981 | } | |
bccf2150 | 1982 | default: |
313a3dc7 | 1983 | r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
bccf2150 AK |
1984 | } |
1985 | out: | |
2122ff5e | 1986 | vcpu_put(vcpu); |
fa3795a7 DH |
1987 | kfree(fpu); |
1988 | kfree(kvm_sregs); | |
bccf2150 AK |
1989 | return r; |
1990 | } | |
1991 | ||
1dda606c AG |
1992 | #ifdef CONFIG_COMPAT |
1993 | static long kvm_vcpu_compat_ioctl(struct file *filp, | |
1994 | unsigned int ioctl, unsigned long arg) | |
1995 | { | |
1996 | struct kvm_vcpu *vcpu = filp->private_data; | |
1997 | void __user *argp = compat_ptr(arg); | |
1998 | int r; | |
1999 | ||
2000 | if (vcpu->kvm->mm != current->mm) | |
2001 | return -EIO; | |
2002 | ||
2003 | switch (ioctl) { | |
2004 | case KVM_SET_SIGNAL_MASK: { | |
2005 | struct kvm_signal_mask __user *sigmask_arg = argp; | |
2006 | struct kvm_signal_mask kvm_sigmask; | |
2007 | compat_sigset_t csigset; | |
2008 | sigset_t sigset; | |
2009 | ||
2010 | if (argp) { | |
2011 | r = -EFAULT; | |
2012 | if (copy_from_user(&kvm_sigmask, argp, | |
2013 | sizeof kvm_sigmask)) | |
2014 | goto out; | |
2015 | r = -EINVAL; | |
2016 | if (kvm_sigmask.len != sizeof csigset) | |
2017 | goto out; | |
2018 | r = -EFAULT; | |
2019 | if (copy_from_user(&csigset, sigmask_arg->sigset, | |
2020 | sizeof csigset)) | |
2021 | goto out; | |
2022 | } | |
2023 | sigset_from_compat(&sigset, &csigset); | |
2024 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); | |
2025 | break; | |
2026 | } | |
2027 | default: | |
2028 | r = kvm_vcpu_ioctl(filp, ioctl, arg); | |
2029 | } | |
2030 | ||
2031 | out: | |
2032 | return r; | |
2033 | } | |
2034 | #endif | |
2035 | ||
bccf2150 AK |
2036 | static long kvm_vm_ioctl(struct file *filp, |
2037 | unsigned int ioctl, unsigned long arg) | |
2038 | { | |
2039 | struct kvm *kvm = filp->private_data; | |
2040 | void __user *argp = (void __user *)arg; | |
1fe779f8 | 2041 | int r; |
bccf2150 | 2042 | |
6d4e4c4f AK |
2043 | if (kvm->mm != current->mm) |
2044 | return -EIO; | |
bccf2150 AK |
2045 | switch (ioctl) { |
2046 | case KVM_CREATE_VCPU: | |
2047 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); | |
2048 | if (r < 0) | |
2049 | goto out; | |
2050 | break; | |
6fc138d2 IE |
2051 | case KVM_SET_USER_MEMORY_REGION: { |
2052 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
2053 | ||
2054 | r = -EFAULT; | |
2055 | if (copy_from_user(&kvm_userspace_mem, argp, | |
2056 | sizeof kvm_userspace_mem)) | |
2057 | goto out; | |
2058 | ||
2059 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1); | |
6aa8b732 AK |
2060 | if (r) |
2061 | goto out; | |
2062 | break; | |
2063 | } | |
2064 | case KVM_GET_DIRTY_LOG: { | |
2065 | struct kvm_dirty_log log; | |
2066 | ||
2067 | r = -EFAULT; | |
2f366987 | 2068 | if (copy_from_user(&log, argp, sizeof log)) |
6aa8b732 | 2069 | goto out; |
2c6f5df9 | 2070 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
6aa8b732 AK |
2071 | if (r) |
2072 | goto out; | |
2073 | break; | |
2074 | } | |
5f94c174 LV |
2075 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
2076 | case KVM_REGISTER_COALESCED_MMIO: { | |
2077 | struct kvm_coalesced_mmio_zone zone; | |
2078 | r = -EFAULT; | |
2079 | if (copy_from_user(&zone, argp, sizeof zone)) | |
2080 | goto out; | |
5f94c174 LV |
2081 | r = kvm_vm_ioctl_register_coalesced_mmio(kvm, &zone); |
2082 | if (r) | |
2083 | goto out; | |
2084 | r = 0; | |
2085 | break; | |
2086 | } | |
2087 | case KVM_UNREGISTER_COALESCED_MMIO: { | |
2088 | struct kvm_coalesced_mmio_zone zone; | |
2089 | r = -EFAULT; | |
2090 | if (copy_from_user(&zone, argp, sizeof zone)) | |
2091 | goto out; | |
5f94c174 LV |
2092 | r = kvm_vm_ioctl_unregister_coalesced_mmio(kvm, &zone); |
2093 | if (r) | |
2094 | goto out; | |
2095 | r = 0; | |
2096 | break; | |
2097 | } | |
2098 | #endif | |
721eecbf GH |
2099 | case KVM_IRQFD: { |
2100 | struct kvm_irqfd data; | |
2101 | ||
2102 | r = -EFAULT; | |
2103 | if (copy_from_user(&data, argp, sizeof data)) | |
2104 | goto out; | |
d4db2935 | 2105 | r = kvm_irqfd(kvm, &data); |
721eecbf GH |
2106 | break; |
2107 | } | |
d34e6b17 GH |
2108 | case KVM_IOEVENTFD: { |
2109 | struct kvm_ioeventfd data; | |
2110 | ||
2111 | r = -EFAULT; | |
2112 | if (copy_from_user(&data, argp, sizeof data)) | |
2113 | goto out; | |
2114 | r = kvm_ioeventfd(kvm, &data); | |
2115 | break; | |
2116 | } | |
73880c80 GN |
2117 | #ifdef CONFIG_KVM_APIC_ARCHITECTURE |
2118 | case KVM_SET_BOOT_CPU_ID: | |
2119 | r = 0; | |
894a9c55 | 2120 | mutex_lock(&kvm->lock); |
73880c80 GN |
2121 | if (atomic_read(&kvm->online_vcpus) != 0) |
2122 | r = -EBUSY; | |
2123 | else | |
2124 | kvm->bsp_vcpu_id = arg; | |
894a9c55 | 2125 | mutex_unlock(&kvm->lock); |
73880c80 | 2126 | break; |
07975ad3 JK |
2127 | #endif |
2128 | #ifdef CONFIG_HAVE_KVM_MSI | |
2129 | case KVM_SIGNAL_MSI: { | |
2130 | struct kvm_msi msi; | |
2131 | ||
2132 | r = -EFAULT; | |
2133 | if (copy_from_user(&msi, argp, sizeof msi)) | |
2134 | goto out; | |
2135 | r = kvm_send_userspace_msi(kvm, &msi); | |
2136 | break; | |
2137 | } | |
73880c80 | 2138 | #endif |
f17abe9a | 2139 | default: |
1fe779f8 | 2140 | r = kvm_arch_vm_ioctl(filp, ioctl, arg); |
bfd99ff5 AK |
2141 | if (r == -ENOTTY) |
2142 | r = kvm_vm_ioctl_assigned_device(kvm, ioctl, arg); | |
f17abe9a AK |
2143 | } |
2144 | out: | |
2145 | return r; | |
2146 | } | |
2147 | ||
6ff5894c AB |
2148 | #ifdef CONFIG_COMPAT |
2149 | struct compat_kvm_dirty_log { | |
2150 | __u32 slot; | |
2151 | __u32 padding1; | |
2152 | union { | |
2153 | compat_uptr_t dirty_bitmap; /* one bit per page */ | |
2154 | __u64 padding2; | |
2155 | }; | |
2156 | }; | |
2157 | ||
2158 | static long kvm_vm_compat_ioctl(struct file *filp, | |
2159 | unsigned int ioctl, unsigned long arg) | |
2160 | { | |
2161 | struct kvm *kvm = filp->private_data; | |
2162 | int r; | |
2163 | ||
2164 | if (kvm->mm != current->mm) | |
2165 | return -EIO; | |
2166 | switch (ioctl) { | |
2167 | case KVM_GET_DIRTY_LOG: { | |
2168 | struct compat_kvm_dirty_log compat_log; | |
2169 | struct kvm_dirty_log log; | |
2170 | ||
2171 | r = -EFAULT; | |
2172 | if (copy_from_user(&compat_log, (void __user *)arg, | |
2173 | sizeof(compat_log))) | |
2174 | goto out; | |
2175 | log.slot = compat_log.slot; | |
2176 | log.padding1 = compat_log.padding1; | |
2177 | log.padding2 = compat_log.padding2; | |
2178 | log.dirty_bitmap = compat_ptr(compat_log.dirty_bitmap); | |
2179 | ||
2180 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); | |
2181 | if (r) | |
2182 | goto out; | |
2183 | break; | |
2184 | } | |
2185 | default: | |
2186 | r = kvm_vm_ioctl(filp, ioctl, arg); | |
2187 | } | |
2188 | ||
2189 | out: | |
2190 | return r; | |
2191 | } | |
2192 | #endif | |
2193 | ||
e4a533a4 | 2194 | static int kvm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
f17abe9a | 2195 | { |
777b3f49 MT |
2196 | struct page *page[1]; |
2197 | unsigned long addr; | |
2198 | int npages; | |
2199 | gfn_t gfn = vmf->pgoff; | |
f17abe9a | 2200 | struct kvm *kvm = vma->vm_file->private_data; |
f17abe9a | 2201 | |
777b3f49 MT |
2202 | addr = gfn_to_hva(kvm, gfn); |
2203 | if (kvm_is_error_hva(addr)) | |
e4a533a4 | 2204 | return VM_FAULT_SIGBUS; |
777b3f49 MT |
2205 | |
2206 | npages = get_user_pages(current, current->mm, addr, 1, 1, 0, page, | |
2207 | NULL); | |
2208 | if (unlikely(npages != 1)) | |
e4a533a4 | 2209 | return VM_FAULT_SIGBUS; |
777b3f49 MT |
2210 | |
2211 | vmf->page = page[0]; | |
e4a533a4 | 2212 | return 0; |
f17abe9a AK |
2213 | } |
2214 | ||
f0f37e2f | 2215 | static const struct vm_operations_struct kvm_vm_vm_ops = { |
e4a533a4 | 2216 | .fault = kvm_vm_fault, |
f17abe9a AK |
2217 | }; |
2218 | ||
2219 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) | |
2220 | { | |
2221 | vma->vm_ops = &kvm_vm_vm_ops; | |
2222 | return 0; | |
2223 | } | |
2224 | ||
3d3aab1b | 2225 | static struct file_operations kvm_vm_fops = { |
f17abe9a AK |
2226 | .release = kvm_vm_release, |
2227 | .unlocked_ioctl = kvm_vm_ioctl, | |
6ff5894c AB |
2228 | #ifdef CONFIG_COMPAT |
2229 | .compat_ioctl = kvm_vm_compat_ioctl, | |
2230 | #endif | |
f17abe9a | 2231 | .mmap = kvm_vm_mmap, |
6038f373 | 2232 | .llseek = noop_llseek, |
f17abe9a AK |
2233 | }; |
2234 | ||
e08b9637 | 2235 | static int kvm_dev_ioctl_create_vm(unsigned long type) |
f17abe9a | 2236 | { |
aac87636 | 2237 | int r; |
f17abe9a AK |
2238 | struct kvm *kvm; |
2239 | ||
e08b9637 | 2240 | kvm = kvm_create_vm(type); |
d6d28168 AK |
2241 | if (IS_ERR(kvm)) |
2242 | return PTR_ERR(kvm); | |
6ce5a090 TY |
2243 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
2244 | r = kvm_coalesced_mmio_init(kvm); | |
2245 | if (r < 0) { | |
2246 | kvm_put_kvm(kvm); | |
2247 | return r; | |
2248 | } | |
2249 | #endif | |
aac87636 HC |
2250 | r = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, O_RDWR); |
2251 | if (r < 0) | |
66c0b394 | 2252 | kvm_put_kvm(kvm); |
f17abe9a | 2253 | |
aac87636 | 2254 | return r; |
f17abe9a AK |
2255 | } |
2256 | ||
1a811b61 AK |
2257 | static long kvm_dev_ioctl_check_extension_generic(long arg) |
2258 | { | |
2259 | switch (arg) { | |
ca9edaee | 2260 | case KVM_CAP_USER_MEMORY: |
1a811b61 | 2261 | case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: |
4cd481f6 | 2262 | case KVM_CAP_JOIN_MEMORY_REGIONS_WORKS: |
73880c80 GN |
2263 | #ifdef CONFIG_KVM_APIC_ARCHITECTURE |
2264 | case KVM_CAP_SET_BOOT_CPU_ID: | |
2265 | #endif | |
a9c7399d | 2266 | case KVM_CAP_INTERNAL_ERROR_DATA: |
07975ad3 JK |
2267 | #ifdef CONFIG_HAVE_KVM_MSI |
2268 | case KVM_CAP_SIGNAL_MSI: | |
2269 | #endif | |
1a811b61 | 2270 | return 1; |
9900b4b4 | 2271 | #ifdef KVM_CAP_IRQ_ROUTING |
399ec807 | 2272 | case KVM_CAP_IRQ_ROUTING: |
36463146 | 2273 | return KVM_MAX_IRQ_ROUTES; |
399ec807 | 2274 | #endif |
1a811b61 AK |
2275 | default: |
2276 | break; | |
2277 | } | |
2278 | return kvm_dev_ioctl_check_extension(arg); | |
2279 | } | |
2280 | ||
f17abe9a AK |
2281 | static long kvm_dev_ioctl(struct file *filp, |
2282 | unsigned int ioctl, unsigned long arg) | |
2283 | { | |
07c45a36 | 2284 | long r = -EINVAL; |
f17abe9a AK |
2285 | |
2286 | switch (ioctl) { | |
2287 | case KVM_GET_API_VERSION: | |
f0fe5108 AK |
2288 | r = -EINVAL; |
2289 | if (arg) | |
2290 | goto out; | |
f17abe9a AK |
2291 | r = KVM_API_VERSION; |
2292 | break; | |
2293 | case KVM_CREATE_VM: | |
e08b9637 | 2294 | r = kvm_dev_ioctl_create_vm(arg); |
f17abe9a | 2295 | break; |
018d00d2 | 2296 | case KVM_CHECK_EXTENSION: |
1a811b61 | 2297 | r = kvm_dev_ioctl_check_extension_generic(arg); |
5d308f45 | 2298 | break; |
07c45a36 AK |
2299 | case KVM_GET_VCPU_MMAP_SIZE: |
2300 | r = -EINVAL; | |
2301 | if (arg) | |
2302 | goto out; | |
adb1ff46 AK |
2303 | r = PAGE_SIZE; /* struct kvm_run */ |
2304 | #ifdef CONFIG_X86 | |
2305 | r += PAGE_SIZE; /* pio data page */ | |
5f94c174 LV |
2306 | #endif |
2307 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
2308 | r += PAGE_SIZE; /* coalesced mmio ring page */ | |
adb1ff46 | 2309 | #endif |
07c45a36 | 2310 | break; |
d4c9ff2d FEL |
2311 | case KVM_TRACE_ENABLE: |
2312 | case KVM_TRACE_PAUSE: | |
2313 | case KVM_TRACE_DISABLE: | |
2023a29c | 2314 | r = -EOPNOTSUPP; |
d4c9ff2d | 2315 | break; |
6aa8b732 | 2316 | default: |
043405e1 | 2317 | return kvm_arch_dev_ioctl(filp, ioctl, arg); |
6aa8b732 AK |
2318 | } |
2319 | out: | |
2320 | return r; | |
2321 | } | |
2322 | ||
6aa8b732 | 2323 | static struct file_operations kvm_chardev_ops = { |
6aa8b732 AK |
2324 | .unlocked_ioctl = kvm_dev_ioctl, |
2325 | .compat_ioctl = kvm_dev_ioctl, | |
6038f373 | 2326 | .llseek = noop_llseek, |
6aa8b732 AK |
2327 | }; |
2328 | ||
2329 | static struct miscdevice kvm_dev = { | |
bbe4432e | 2330 | KVM_MINOR, |
6aa8b732 AK |
2331 | "kvm", |
2332 | &kvm_chardev_ops, | |
2333 | }; | |
2334 | ||
75b7127c | 2335 | static void hardware_enable_nolock(void *junk) |
1b6c0168 AK |
2336 | { |
2337 | int cpu = raw_smp_processor_id(); | |
10474ae8 | 2338 | int r; |
1b6c0168 | 2339 | |
7f59f492 | 2340 | if (cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
1b6c0168 | 2341 | return; |
10474ae8 | 2342 | |
7f59f492 | 2343 | cpumask_set_cpu(cpu, cpus_hardware_enabled); |
10474ae8 AG |
2344 | |
2345 | r = kvm_arch_hardware_enable(NULL); | |
2346 | ||
2347 | if (r) { | |
2348 | cpumask_clear_cpu(cpu, cpus_hardware_enabled); | |
2349 | atomic_inc(&hardware_enable_failed); | |
2350 | printk(KERN_INFO "kvm: enabling virtualization on " | |
2351 | "CPU%d failed\n", cpu); | |
2352 | } | |
1b6c0168 AK |
2353 | } |
2354 | ||
75b7127c TY |
2355 | static void hardware_enable(void *junk) |
2356 | { | |
e935b837 | 2357 | raw_spin_lock(&kvm_lock); |
75b7127c | 2358 | hardware_enable_nolock(junk); |
e935b837 | 2359 | raw_spin_unlock(&kvm_lock); |
75b7127c TY |
2360 | } |
2361 | ||
2362 | static void hardware_disable_nolock(void *junk) | |
1b6c0168 AK |
2363 | { |
2364 | int cpu = raw_smp_processor_id(); | |
2365 | ||
7f59f492 | 2366 | if (!cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
1b6c0168 | 2367 | return; |
7f59f492 | 2368 | cpumask_clear_cpu(cpu, cpus_hardware_enabled); |
e9b11c17 | 2369 | kvm_arch_hardware_disable(NULL); |
1b6c0168 AK |
2370 | } |
2371 | ||
75b7127c TY |
2372 | static void hardware_disable(void *junk) |
2373 | { | |
e935b837 | 2374 | raw_spin_lock(&kvm_lock); |
75b7127c | 2375 | hardware_disable_nolock(junk); |
e935b837 | 2376 | raw_spin_unlock(&kvm_lock); |
75b7127c TY |
2377 | } |
2378 | ||
10474ae8 AG |
2379 | static void hardware_disable_all_nolock(void) |
2380 | { | |
2381 | BUG_ON(!kvm_usage_count); | |
2382 | ||
2383 | kvm_usage_count--; | |
2384 | if (!kvm_usage_count) | |
75b7127c | 2385 | on_each_cpu(hardware_disable_nolock, NULL, 1); |
10474ae8 AG |
2386 | } |
2387 | ||
2388 | static void hardware_disable_all(void) | |
2389 | { | |
e935b837 | 2390 | raw_spin_lock(&kvm_lock); |
10474ae8 | 2391 | hardware_disable_all_nolock(); |
e935b837 | 2392 | raw_spin_unlock(&kvm_lock); |
10474ae8 AG |
2393 | } |
2394 | ||
2395 | static int hardware_enable_all(void) | |
2396 | { | |
2397 | int r = 0; | |
2398 | ||
e935b837 | 2399 | raw_spin_lock(&kvm_lock); |
10474ae8 AG |
2400 | |
2401 | kvm_usage_count++; | |
2402 | if (kvm_usage_count == 1) { | |
2403 | atomic_set(&hardware_enable_failed, 0); | |
75b7127c | 2404 | on_each_cpu(hardware_enable_nolock, NULL, 1); |
10474ae8 AG |
2405 | |
2406 | if (atomic_read(&hardware_enable_failed)) { | |
2407 | hardware_disable_all_nolock(); | |
2408 | r = -EBUSY; | |
2409 | } | |
2410 | } | |
2411 | ||
e935b837 | 2412 | raw_spin_unlock(&kvm_lock); |
10474ae8 AG |
2413 | |
2414 | return r; | |
2415 | } | |
2416 | ||
774c47f1 AK |
2417 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, |
2418 | void *v) | |
2419 | { | |
2420 | int cpu = (long)v; | |
2421 | ||
10474ae8 AG |
2422 | if (!kvm_usage_count) |
2423 | return NOTIFY_OK; | |
2424 | ||
1a6f4d7f | 2425 | val &= ~CPU_TASKS_FROZEN; |
774c47f1 | 2426 | switch (val) { |
cec9ad27 | 2427 | case CPU_DYING: |
6ec8a856 AK |
2428 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
2429 | cpu); | |
2430 | hardware_disable(NULL); | |
2431 | break; | |
da908f2f | 2432 | case CPU_STARTING: |
43934a38 JK |
2433 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", |
2434 | cpu); | |
da908f2f | 2435 | hardware_enable(NULL); |
774c47f1 AK |
2436 | break; |
2437 | } | |
2438 | return NOTIFY_OK; | |
2439 | } | |
2440 | ||
4ecac3fd | 2441 | |
b7c4145b | 2442 | asmlinkage void kvm_spurious_fault(void) |
4ecac3fd | 2443 | { |
4ecac3fd AK |
2444 | /* Fault while not rebooting. We want the trace. */ |
2445 | BUG(); | |
2446 | } | |
b7c4145b | 2447 | EXPORT_SYMBOL_GPL(kvm_spurious_fault); |
4ecac3fd | 2448 | |
9a2b85c6 | 2449 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, |
d77c26fc | 2450 | void *v) |
9a2b85c6 | 2451 | { |
8e1c1815 SY |
2452 | /* |
2453 | * Some (well, at least mine) BIOSes hang on reboot if | |
2454 | * in vmx root mode. | |
2455 | * | |
2456 | * And Intel TXT required VMX off for all cpu when system shutdown. | |
2457 | */ | |
2458 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); | |
2459 | kvm_rebooting = true; | |
75b7127c | 2460 | on_each_cpu(hardware_disable_nolock, NULL, 1); |
9a2b85c6 RR |
2461 | return NOTIFY_OK; |
2462 | } | |
2463 | ||
2464 | static struct notifier_block kvm_reboot_notifier = { | |
2465 | .notifier_call = kvm_reboot, | |
2466 | .priority = 0, | |
2467 | }; | |
2468 | ||
e93f8a0f | 2469 | static void kvm_io_bus_destroy(struct kvm_io_bus *bus) |
2eeb2e94 GH |
2470 | { |
2471 | int i; | |
2472 | ||
2473 | for (i = 0; i < bus->dev_count; i++) { | |
743eeb0b | 2474 | struct kvm_io_device *pos = bus->range[i].dev; |
2eeb2e94 GH |
2475 | |
2476 | kvm_iodevice_destructor(pos); | |
2477 | } | |
e93f8a0f | 2478 | kfree(bus); |
2eeb2e94 GH |
2479 | } |
2480 | ||
743eeb0b SL |
2481 | int kvm_io_bus_sort_cmp(const void *p1, const void *p2) |
2482 | { | |
2483 | const struct kvm_io_range *r1 = p1; | |
2484 | const struct kvm_io_range *r2 = p2; | |
2485 | ||
2486 | if (r1->addr < r2->addr) | |
2487 | return -1; | |
2488 | if (r1->addr + r1->len > r2->addr + r2->len) | |
2489 | return 1; | |
2490 | return 0; | |
2491 | } | |
2492 | ||
2493 | int kvm_io_bus_insert_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev, | |
2494 | gpa_t addr, int len) | |
2495 | { | |
743eeb0b SL |
2496 | bus->range[bus->dev_count++] = (struct kvm_io_range) { |
2497 | .addr = addr, | |
2498 | .len = len, | |
2499 | .dev = dev, | |
2500 | }; | |
2501 | ||
2502 | sort(bus->range, bus->dev_count, sizeof(struct kvm_io_range), | |
2503 | kvm_io_bus_sort_cmp, NULL); | |
2504 | ||
2505 | return 0; | |
2506 | } | |
2507 | ||
2508 | int kvm_io_bus_get_first_dev(struct kvm_io_bus *bus, | |
2509 | gpa_t addr, int len) | |
2510 | { | |
2511 | struct kvm_io_range *range, key; | |
2512 | int off; | |
2513 | ||
2514 | key = (struct kvm_io_range) { | |
2515 | .addr = addr, | |
2516 | .len = len, | |
2517 | }; | |
2518 | ||
2519 | range = bsearch(&key, bus->range, bus->dev_count, | |
2520 | sizeof(struct kvm_io_range), kvm_io_bus_sort_cmp); | |
2521 | if (range == NULL) | |
2522 | return -ENOENT; | |
2523 | ||
2524 | off = range - bus->range; | |
2525 | ||
2526 | while (off > 0 && kvm_io_bus_sort_cmp(&key, &bus->range[off-1]) == 0) | |
2527 | off--; | |
2528 | ||
2529 | return off; | |
2530 | } | |
2531 | ||
bda9020e | 2532 | /* kvm_io_bus_write - called under kvm->slots_lock */ |
e93f8a0f | 2533 | int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, |
bda9020e | 2534 | int len, const void *val) |
2eeb2e94 | 2535 | { |
743eeb0b | 2536 | int idx; |
90d83dc3 | 2537 | struct kvm_io_bus *bus; |
743eeb0b SL |
2538 | struct kvm_io_range range; |
2539 | ||
2540 | range = (struct kvm_io_range) { | |
2541 | .addr = addr, | |
2542 | .len = len, | |
2543 | }; | |
90d83dc3 LJ |
2544 | |
2545 | bus = srcu_dereference(kvm->buses[bus_idx], &kvm->srcu); | |
743eeb0b SL |
2546 | idx = kvm_io_bus_get_first_dev(bus, addr, len); |
2547 | if (idx < 0) | |
2548 | return -EOPNOTSUPP; | |
2549 | ||
2550 | while (idx < bus->dev_count && | |
2551 | kvm_io_bus_sort_cmp(&range, &bus->range[idx]) == 0) { | |
2552 | if (!kvm_iodevice_write(bus->range[idx].dev, addr, len, val)) | |
bda9020e | 2553 | return 0; |
743eeb0b SL |
2554 | idx++; |
2555 | } | |
2556 | ||
bda9020e MT |
2557 | return -EOPNOTSUPP; |
2558 | } | |
2eeb2e94 | 2559 | |
bda9020e | 2560 | /* kvm_io_bus_read - called under kvm->slots_lock */ |
e93f8a0f MT |
2561 | int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, |
2562 | int len, void *val) | |
bda9020e | 2563 | { |
743eeb0b | 2564 | int idx; |
90d83dc3 | 2565 | struct kvm_io_bus *bus; |
743eeb0b SL |
2566 | struct kvm_io_range range; |
2567 | ||
2568 | range = (struct kvm_io_range) { | |
2569 | .addr = addr, | |
2570 | .len = len, | |
2571 | }; | |
e93f8a0f | 2572 | |
90d83dc3 | 2573 | bus = srcu_dereference(kvm->buses[bus_idx], &kvm->srcu); |
743eeb0b SL |
2574 | idx = kvm_io_bus_get_first_dev(bus, addr, len); |
2575 | if (idx < 0) | |
2576 | return -EOPNOTSUPP; | |
2577 | ||
2578 | while (idx < bus->dev_count && | |
2579 | kvm_io_bus_sort_cmp(&range, &bus->range[idx]) == 0) { | |
2580 | if (!kvm_iodevice_read(bus->range[idx].dev, addr, len, val)) | |
bda9020e | 2581 | return 0; |
743eeb0b SL |
2582 | idx++; |
2583 | } | |
2584 | ||
bda9020e | 2585 | return -EOPNOTSUPP; |
2eeb2e94 GH |
2586 | } |
2587 | ||
79fac95e | 2588 | /* Caller must hold slots_lock. */ |
743eeb0b SL |
2589 | int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, |
2590 | int len, struct kvm_io_device *dev) | |
6c474694 | 2591 | { |
e93f8a0f | 2592 | struct kvm_io_bus *new_bus, *bus; |
090b7aff | 2593 | |
e93f8a0f | 2594 | bus = kvm->buses[bus_idx]; |
a1300716 | 2595 | if (bus->dev_count > NR_IOBUS_DEVS - 1) |
090b7aff | 2596 | return -ENOSPC; |
2eeb2e94 | 2597 | |
a1300716 AK |
2598 | new_bus = kzalloc(sizeof(*bus) + ((bus->dev_count + 1) * |
2599 | sizeof(struct kvm_io_range)), GFP_KERNEL); | |
e93f8a0f MT |
2600 | if (!new_bus) |
2601 | return -ENOMEM; | |
a1300716 AK |
2602 | memcpy(new_bus, bus, sizeof(*bus) + (bus->dev_count * |
2603 | sizeof(struct kvm_io_range))); | |
743eeb0b | 2604 | kvm_io_bus_insert_dev(new_bus, dev, addr, len); |
e93f8a0f MT |
2605 | rcu_assign_pointer(kvm->buses[bus_idx], new_bus); |
2606 | synchronize_srcu_expedited(&kvm->srcu); | |
2607 | kfree(bus); | |
090b7aff GH |
2608 | |
2609 | return 0; | |
2610 | } | |
2611 | ||
79fac95e | 2612 | /* Caller must hold slots_lock. */ |
e93f8a0f MT |
2613 | int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx, |
2614 | struct kvm_io_device *dev) | |
090b7aff | 2615 | { |
e93f8a0f MT |
2616 | int i, r; |
2617 | struct kvm_io_bus *new_bus, *bus; | |
090b7aff | 2618 | |
cdfca7b3 | 2619 | bus = kvm->buses[bus_idx]; |
e93f8a0f | 2620 | r = -ENOENT; |
a1300716 AK |
2621 | for (i = 0; i < bus->dev_count; i++) |
2622 | if (bus->range[i].dev == dev) { | |
e93f8a0f | 2623 | r = 0; |
090b7aff GH |
2624 | break; |
2625 | } | |
e93f8a0f | 2626 | |
a1300716 | 2627 | if (r) |
e93f8a0f | 2628 | return r; |
a1300716 AK |
2629 | |
2630 | new_bus = kzalloc(sizeof(*bus) + ((bus->dev_count - 1) * | |
2631 | sizeof(struct kvm_io_range)), GFP_KERNEL); | |
2632 | if (!new_bus) | |
2633 | return -ENOMEM; | |
2634 | ||
2635 | memcpy(new_bus, bus, sizeof(*bus) + i * sizeof(struct kvm_io_range)); | |
2636 | new_bus->dev_count--; | |
2637 | memcpy(new_bus->range + i, bus->range + i + 1, | |
2638 | (new_bus->dev_count - i) * sizeof(struct kvm_io_range)); | |
e93f8a0f MT |
2639 | |
2640 | rcu_assign_pointer(kvm->buses[bus_idx], new_bus); | |
2641 | synchronize_srcu_expedited(&kvm->srcu); | |
2642 | kfree(bus); | |
2643 | return r; | |
2eeb2e94 GH |
2644 | } |
2645 | ||
774c47f1 AK |
2646 | static struct notifier_block kvm_cpu_notifier = { |
2647 | .notifier_call = kvm_cpu_hotplug, | |
774c47f1 AK |
2648 | }; |
2649 | ||
8b88b099 | 2650 | static int vm_stat_get(void *_offset, u64 *val) |
ba1389b7 AK |
2651 | { |
2652 | unsigned offset = (long)_offset; | |
ba1389b7 AK |
2653 | struct kvm *kvm; |
2654 | ||
8b88b099 | 2655 | *val = 0; |
e935b837 | 2656 | raw_spin_lock(&kvm_lock); |
ba1389b7 | 2657 | list_for_each_entry(kvm, &vm_list, vm_list) |
8b88b099 | 2658 | *val += *(u32 *)((void *)kvm + offset); |
e935b837 | 2659 | raw_spin_unlock(&kvm_lock); |
8b88b099 | 2660 | return 0; |
ba1389b7 AK |
2661 | } |
2662 | ||
2663 | DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n"); | |
2664 | ||
8b88b099 | 2665 | static int vcpu_stat_get(void *_offset, u64 *val) |
1165f5fe AK |
2666 | { |
2667 | unsigned offset = (long)_offset; | |
1165f5fe AK |
2668 | struct kvm *kvm; |
2669 | struct kvm_vcpu *vcpu; | |
2670 | int i; | |
2671 | ||
8b88b099 | 2672 | *val = 0; |
e935b837 | 2673 | raw_spin_lock(&kvm_lock); |
1165f5fe | 2674 | list_for_each_entry(kvm, &vm_list, vm_list) |
988a2cae GN |
2675 | kvm_for_each_vcpu(i, vcpu, kvm) |
2676 | *val += *(u32 *)((void *)vcpu + offset); | |
2677 | ||
e935b837 | 2678 | raw_spin_unlock(&kvm_lock); |
8b88b099 | 2679 | return 0; |
1165f5fe AK |
2680 | } |
2681 | ||
ba1389b7 AK |
2682 | DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n"); |
2683 | ||
828c0950 | 2684 | static const struct file_operations *stat_fops[] = { |
ba1389b7 AK |
2685 | [KVM_STAT_VCPU] = &vcpu_stat_fops, |
2686 | [KVM_STAT_VM] = &vm_stat_fops, | |
2687 | }; | |
1165f5fe | 2688 | |
4f69b680 | 2689 | static int kvm_init_debug(void) |
6aa8b732 | 2690 | { |
4f69b680 | 2691 | int r = -EFAULT; |
6aa8b732 AK |
2692 | struct kvm_stats_debugfs_item *p; |
2693 | ||
76f7c879 | 2694 | kvm_debugfs_dir = debugfs_create_dir("kvm", NULL); |
4f69b680 H |
2695 | if (kvm_debugfs_dir == NULL) |
2696 | goto out; | |
2697 | ||
2698 | for (p = debugfs_entries; p->name; ++p) { | |
76f7c879 | 2699 | p->dentry = debugfs_create_file(p->name, 0444, kvm_debugfs_dir, |
1165f5fe | 2700 | (void *)(long)p->offset, |
ba1389b7 | 2701 | stat_fops[p->kind]); |
4f69b680 H |
2702 | if (p->dentry == NULL) |
2703 | goto out_dir; | |
2704 | } | |
2705 | ||
2706 | return 0; | |
2707 | ||
2708 | out_dir: | |
2709 | debugfs_remove_recursive(kvm_debugfs_dir); | |
2710 | out: | |
2711 | return r; | |
6aa8b732 AK |
2712 | } |
2713 | ||
2714 | static void kvm_exit_debug(void) | |
2715 | { | |
2716 | struct kvm_stats_debugfs_item *p; | |
2717 | ||
2718 | for (p = debugfs_entries; p->name; ++p) | |
2719 | debugfs_remove(p->dentry); | |
76f7c879 | 2720 | debugfs_remove(kvm_debugfs_dir); |
6aa8b732 AK |
2721 | } |
2722 | ||
fb3600cc | 2723 | static int kvm_suspend(void) |
59ae6c6b | 2724 | { |
10474ae8 | 2725 | if (kvm_usage_count) |
75b7127c | 2726 | hardware_disable_nolock(NULL); |
59ae6c6b AK |
2727 | return 0; |
2728 | } | |
2729 | ||
fb3600cc | 2730 | static void kvm_resume(void) |
59ae6c6b | 2731 | { |
ca84d1a2 | 2732 | if (kvm_usage_count) { |
e935b837 | 2733 | WARN_ON(raw_spin_is_locked(&kvm_lock)); |
75b7127c | 2734 | hardware_enable_nolock(NULL); |
ca84d1a2 | 2735 | } |
59ae6c6b AK |
2736 | } |
2737 | ||
fb3600cc | 2738 | static struct syscore_ops kvm_syscore_ops = { |
59ae6c6b AK |
2739 | .suspend = kvm_suspend, |
2740 | .resume = kvm_resume, | |
2741 | }; | |
2742 | ||
15ad7146 AK |
2743 | static inline |
2744 | struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn) | |
2745 | { | |
2746 | return container_of(pn, struct kvm_vcpu, preempt_notifier); | |
2747 | } | |
2748 | ||
2749 | static void kvm_sched_in(struct preempt_notifier *pn, int cpu) | |
2750 | { | |
2751 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
2752 | ||
e9b11c17 | 2753 | kvm_arch_vcpu_load(vcpu, cpu); |
15ad7146 AK |
2754 | } |
2755 | ||
2756 | static void kvm_sched_out(struct preempt_notifier *pn, | |
2757 | struct task_struct *next) | |
2758 | { | |
2759 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
2760 | ||
e9b11c17 | 2761 | kvm_arch_vcpu_put(vcpu); |
15ad7146 AK |
2762 | } |
2763 | ||
0ee75bea | 2764 | int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, |
c16f862d | 2765 | struct module *module) |
6aa8b732 AK |
2766 | { |
2767 | int r; | |
002c7f7c | 2768 | int cpu; |
6aa8b732 | 2769 | |
f8c16bba ZX |
2770 | r = kvm_arch_init(opaque); |
2771 | if (r) | |
d2308784 | 2772 | goto out_fail; |
cb498ea2 ZX |
2773 | |
2774 | bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
2775 | ||
2776 | if (bad_page == NULL) { | |
2777 | r = -ENOMEM; | |
2778 | goto out; | |
2779 | } | |
2780 | ||
35149e21 AL |
2781 | bad_pfn = page_to_pfn(bad_page); |
2782 | ||
bf998156 HY |
2783 | hwpoison_page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
2784 | ||
2785 | if (hwpoison_page == NULL) { | |
2786 | r = -ENOMEM; | |
2787 | goto out_free_0; | |
2788 | } | |
2789 | ||
2790 | hwpoison_pfn = page_to_pfn(hwpoison_page); | |
2791 | ||
edba23e5 GN |
2792 | fault_page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
2793 | ||
2794 | if (fault_page == NULL) { | |
2795 | r = -ENOMEM; | |
2796 | goto out_free_0; | |
2797 | } | |
2798 | ||
2799 | fault_pfn = page_to_pfn(fault_page); | |
2800 | ||
8437a617 | 2801 | if (!zalloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) { |
7f59f492 RR |
2802 | r = -ENOMEM; |
2803 | goto out_free_0; | |
2804 | } | |
2805 | ||
e9b11c17 | 2806 | r = kvm_arch_hardware_setup(); |
6aa8b732 | 2807 | if (r < 0) |
7f59f492 | 2808 | goto out_free_0a; |
6aa8b732 | 2809 | |
002c7f7c YS |
2810 | for_each_online_cpu(cpu) { |
2811 | smp_call_function_single(cpu, | |
e9b11c17 | 2812 | kvm_arch_check_processor_compat, |
8691e5a8 | 2813 | &r, 1); |
002c7f7c | 2814 | if (r < 0) |
d2308784 | 2815 | goto out_free_1; |
002c7f7c YS |
2816 | } |
2817 | ||
774c47f1 AK |
2818 | r = register_cpu_notifier(&kvm_cpu_notifier); |
2819 | if (r) | |
d2308784 | 2820 | goto out_free_2; |
6aa8b732 AK |
2821 | register_reboot_notifier(&kvm_reboot_notifier); |
2822 | ||
c16f862d | 2823 | /* A kmem cache lets us meet the alignment requirements of fx_save. */ |
0ee75bea AK |
2824 | if (!vcpu_align) |
2825 | vcpu_align = __alignof__(struct kvm_vcpu); | |
2826 | kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, vcpu_align, | |
56919c5c | 2827 | 0, NULL); |
c16f862d RR |
2828 | if (!kvm_vcpu_cache) { |
2829 | r = -ENOMEM; | |
fb3600cc | 2830 | goto out_free_3; |
c16f862d RR |
2831 | } |
2832 | ||
af585b92 GN |
2833 | r = kvm_async_pf_init(); |
2834 | if (r) | |
2835 | goto out_free; | |
2836 | ||
6aa8b732 | 2837 | kvm_chardev_ops.owner = module; |
3d3aab1b CB |
2838 | kvm_vm_fops.owner = module; |
2839 | kvm_vcpu_fops.owner = module; | |
6aa8b732 AK |
2840 | |
2841 | r = misc_register(&kvm_dev); | |
2842 | if (r) { | |
d77c26fc | 2843 | printk(KERN_ERR "kvm: misc device register failed\n"); |
af585b92 | 2844 | goto out_unreg; |
6aa8b732 AK |
2845 | } |
2846 | ||
fb3600cc RW |
2847 | register_syscore_ops(&kvm_syscore_ops); |
2848 | ||
15ad7146 AK |
2849 | kvm_preempt_ops.sched_in = kvm_sched_in; |
2850 | kvm_preempt_ops.sched_out = kvm_sched_out; | |
2851 | ||
4f69b680 H |
2852 | r = kvm_init_debug(); |
2853 | if (r) { | |
2854 | printk(KERN_ERR "kvm: create debugfs files failed\n"); | |
2855 | goto out_undebugfs; | |
2856 | } | |
0ea4ed8e | 2857 | |
c7addb90 | 2858 | return 0; |
6aa8b732 | 2859 | |
4f69b680 H |
2860 | out_undebugfs: |
2861 | unregister_syscore_ops(&kvm_syscore_ops); | |
af585b92 GN |
2862 | out_unreg: |
2863 | kvm_async_pf_deinit(); | |
6aa8b732 | 2864 | out_free: |
c16f862d | 2865 | kmem_cache_destroy(kvm_vcpu_cache); |
d2308784 | 2866 | out_free_3: |
6aa8b732 | 2867 | unregister_reboot_notifier(&kvm_reboot_notifier); |
774c47f1 | 2868 | unregister_cpu_notifier(&kvm_cpu_notifier); |
d2308784 | 2869 | out_free_2: |
d2308784 | 2870 | out_free_1: |
e9b11c17 | 2871 | kvm_arch_hardware_unsetup(); |
7f59f492 RR |
2872 | out_free_0a: |
2873 | free_cpumask_var(cpus_hardware_enabled); | |
d2308784 | 2874 | out_free_0: |
edba23e5 GN |
2875 | if (fault_page) |
2876 | __free_page(fault_page); | |
bf998156 HY |
2877 | if (hwpoison_page) |
2878 | __free_page(hwpoison_page); | |
d2308784 | 2879 | __free_page(bad_page); |
ca45aaae | 2880 | out: |
f8c16bba | 2881 | kvm_arch_exit(); |
d2308784 | 2882 | out_fail: |
6aa8b732 AK |
2883 | return r; |
2884 | } | |
cb498ea2 | 2885 | EXPORT_SYMBOL_GPL(kvm_init); |
6aa8b732 | 2886 | |
cb498ea2 | 2887 | void kvm_exit(void) |
6aa8b732 | 2888 | { |
0ea4ed8e | 2889 | kvm_exit_debug(); |
6aa8b732 | 2890 | misc_deregister(&kvm_dev); |
c16f862d | 2891 | kmem_cache_destroy(kvm_vcpu_cache); |
af585b92 | 2892 | kvm_async_pf_deinit(); |
fb3600cc | 2893 | unregister_syscore_ops(&kvm_syscore_ops); |
6aa8b732 | 2894 | unregister_reboot_notifier(&kvm_reboot_notifier); |
59ae6c6b | 2895 | unregister_cpu_notifier(&kvm_cpu_notifier); |
75b7127c | 2896 | on_each_cpu(hardware_disable_nolock, NULL, 1); |
e9b11c17 | 2897 | kvm_arch_hardware_unsetup(); |
f8c16bba | 2898 | kvm_arch_exit(); |
7f59f492 | 2899 | free_cpumask_var(cpus_hardware_enabled); |
f4119304 | 2900 | __free_page(fault_page); |
bf998156 | 2901 | __free_page(hwpoison_page); |
cea7bb21 | 2902 | __free_page(bad_page); |
6aa8b732 | 2903 | } |
cb498ea2 | 2904 | EXPORT_SYMBOL_GPL(kvm_exit); |