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Commit | Line | Data |
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6aa8b732 AK |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * This module enables machines with Intel VT-x extensions to run virtual | |
5 | * machines without emulation or binary translation. | |
6 | * | |
7 | * Copyright (C) 2006 Qumranet, Inc. | |
8 | * | |
9 | * Authors: | |
10 | * Avi Kivity <avi@qumranet.com> | |
11 | * Yaniv Kamay <yaniv@qumranet.com> | |
12 | * | |
13 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
14 | * the COPYING file in the top-level directory. | |
15 | * | |
16 | */ | |
17 | ||
e2174021 | 18 | #include "iodev.h" |
6aa8b732 | 19 | |
edf88417 | 20 | #include <linux/kvm_host.h> |
6aa8b732 AK |
21 | #include <linux/kvm.h> |
22 | #include <linux/module.h> | |
23 | #include <linux/errno.h> | |
6aa8b732 AK |
24 | #include <linux/percpu.h> |
25 | #include <linux/gfp.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> | |
59ae6c6b | 33 | #include <linux/sysdev.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> |
6aa8b732 | 44 | |
e495606d | 45 | #include <asm/processor.h> |
e495606d AK |
46 | #include <asm/io.h> |
47 | #include <asm/uaccess.h> | |
3e021bf5 | 48 | #include <asm/pgtable.h> |
6aa8b732 | 49 | |
5f94c174 LV |
50 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
51 | #include "coalesced_mmio.h" | |
52 | #endif | |
53 | ||
8a98f664 XZ |
54 | #ifdef KVM_CAP_DEVICE_ASSIGNMENT |
55 | #include <linux/pci.h> | |
56 | #include <linux/interrupt.h> | |
57 | #include "irq.h" | |
58 | #endif | |
59 | ||
6aa8b732 AK |
60 | MODULE_AUTHOR("Qumranet"); |
61 | MODULE_LICENSE("GPL"); | |
62 | ||
e9b11c17 ZX |
63 | DEFINE_SPINLOCK(kvm_lock); |
64 | LIST_HEAD(vm_list); | |
133de902 | 65 | |
1b6c0168 AK |
66 | static cpumask_t cpus_hardware_enabled; |
67 | ||
c16f862d RR |
68 | struct kmem_cache *kvm_vcpu_cache; |
69 | EXPORT_SYMBOL_GPL(kvm_vcpu_cache); | |
1165f5fe | 70 | |
15ad7146 AK |
71 | static __read_mostly struct preempt_ops kvm_preempt_ops; |
72 | ||
76f7c879 | 73 | struct dentry *kvm_debugfs_dir; |
6aa8b732 | 74 | |
bccf2150 AK |
75 | static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, |
76 | unsigned long arg); | |
77 | ||
4ecac3fd AK |
78 | bool kvm_rebooting; |
79 | ||
8a98f664 XZ |
80 | #ifdef KVM_CAP_DEVICE_ASSIGNMENT |
81 | static struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head, | |
82 | int assigned_dev_id) | |
83 | { | |
84 | struct list_head *ptr; | |
85 | struct kvm_assigned_dev_kernel *match; | |
86 | ||
87 | list_for_each(ptr, head) { | |
88 | match = list_entry(ptr, struct kvm_assigned_dev_kernel, list); | |
89 | if (match->assigned_dev_id == assigned_dev_id) | |
90 | return match; | |
91 | } | |
92 | return NULL; | |
93 | } | |
94 | ||
95 | static void kvm_assigned_dev_interrupt_work_handler(struct work_struct *work) | |
96 | { | |
97 | struct kvm_assigned_dev_kernel *assigned_dev; | |
98 | ||
99 | assigned_dev = container_of(work, struct kvm_assigned_dev_kernel, | |
100 | interrupt_work); | |
101 | ||
102 | /* This is taken to safely inject irq inside the guest. When | |
103 | * the interrupt injection (or the ioapic code) uses a | |
104 | * finer-grained lock, update this | |
105 | */ | |
106 | mutex_lock(&assigned_dev->kvm->lock); | |
107 | kvm_set_irq(assigned_dev->kvm, | |
108 | assigned_dev->guest_irq, 1); | |
109 | mutex_unlock(&assigned_dev->kvm->lock); | |
110 | kvm_put_kvm(assigned_dev->kvm); | |
111 | } | |
112 | ||
113 | /* FIXME: Implement the OR logic needed to make shared interrupts on | |
114 | * this line behave properly | |
115 | */ | |
116 | static irqreturn_t kvm_assigned_dev_intr(int irq, void *dev_id) | |
117 | { | |
118 | struct kvm_assigned_dev_kernel *assigned_dev = | |
119 | (struct kvm_assigned_dev_kernel *) dev_id; | |
120 | ||
121 | kvm_get_kvm(assigned_dev->kvm); | |
122 | schedule_work(&assigned_dev->interrupt_work); | |
123 | disable_irq_nosync(irq); | |
124 | return IRQ_HANDLED; | |
125 | } | |
126 | ||
127 | /* Ack the irq line for an assigned device */ | |
128 | static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian) | |
129 | { | |
130 | struct kvm_assigned_dev_kernel *dev; | |
131 | ||
132 | if (kian->gsi == -1) | |
133 | return; | |
134 | ||
135 | dev = container_of(kian, struct kvm_assigned_dev_kernel, | |
136 | ack_notifier); | |
137 | kvm_set_irq(dev->kvm, dev->guest_irq, 0); | |
138 | enable_irq(dev->host_irq); | |
139 | } | |
140 | ||
141 | static void kvm_free_assigned_device(struct kvm *kvm, | |
142 | struct kvm_assigned_dev_kernel | |
143 | *assigned_dev) | |
144 | { | |
145 | if (irqchip_in_kernel(kvm) && assigned_dev->irq_requested) | |
146 | free_irq(assigned_dev->host_irq, (void *)assigned_dev); | |
147 | ||
148 | kvm_unregister_irq_ack_notifier(kvm, &assigned_dev->ack_notifier); | |
149 | ||
150 | if (cancel_work_sync(&assigned_dev->interrupt_work)) | |
151 | /* We had pending work. That means we will have to take | |
152 | * care of kvm_put_kvm. | |
153 | */ | |
154 | kvm_put_kvm(kvm); | |
155 | ||
156 | pci_release_regions(assigned_dev->dev); | |
157 | pci_disable_device(assigned_dev->dev); | |
158 | pci_dev_put(assigned_dev->dev); | |
159 | ||
160 | list_del(&assigned_dev->list); | |
161 | kfree(assigned_dev); | |
162 | } | |
163 | ||
164 | void kvm_free_all_assigned_devices(struct kvm *kvm) | |
165 | { | |
166 | struct list_head *ptr, *ptr2; | |
167 | struct kvm_assigned_dev_kernel *assigned_dev; | |
168 | ||
169 | list_for_each_safe(ptr, ptr2, &kvm->arch.assigned_dev_head) { | |
170 | assigned_dev = list_entry(ptr, | |
171 | struct kvm_assigned_dev_kernel, | |
172 | list); | |
173 | ||
174 | kvm_free_assigned_device(kvm, assigned_dev); | |
175 | } | |
176 | } | |
177 | ||
178 | static int kvm_vm_ioctl_assign_irq(struct kvm *kvm, | |
179 | struct kvm_assigned_irq | |
180 | *assigned_irq) | |
181 | { | |
182 | int r = 0; | |
183 | struct kvm_assigned_dev_kernel *match; | |
184 | ||
185 | mutex_lock(&kvm->lock); | |
186 | ||
187 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
188 | assigned_irq->assigned_dev_id); | |
189 | if (!match) { | |
190 | mutex_unlock(&kvm->lock); | |
191 | return -EINVAL; | |
192 | } | |
193 | ||
194 | if (match->irq_requested) { | |
195 | match->guest_irq = assigned_irq->guest_irq; | |
196 | match->ack_notifier.gsi = assigned_irq->guest_irq; | |
197 | mutex_unlock(&kvm->lock); | |
198 | return 0; | |
199 | } | |
200 | ||
201 | INIT_WORK(&match->interrupt_work, | |
202 | kvm_assigned_dev_interrupt_work_handler); | |
203 | ||
204 | if (irqchip_in_kernel(kvm)) { | |
205 | if (!capable(CAP_SYS_RAWIO)) { | |
206 | r = -EPERM; | |
207 | goto out_release; | |
208 | } | |
209 | ||
210 | if (assigned_irq->host_irq) | |
211 | match->host_irq = assigned_irq->host_irq; | |
212 | else | |
213 | match->host_irq = match->dev->irq; | |
214 | match->guest_irq = assigned_irq->guest_irq; | |
215 | match->ack_notifier.gsi = assigned_irq->guest_irq; | |
216 | match->ack_notifier.irq_acked = kvm_assigned_dev_ack_irq; | |
217 | kvm_register_irq_ack_notifier(kvm, &match->ack_notifier); | |
218 | ||
219 | /* Even though this is PCI, we don't want to use shared | |
220 | * interrupts. Sharing host devices with guest-assigned devices | |
221 | * on the same interrupt line is not a happy situation: there | |
222 | * are going to be long delays in accepting, acking, etc. | |
223 | */ | |
224 | if (request_irq(match->host_irq, kvm_assigned_dev_intr, 0, | |
225 | "kvm_assigned_device", (void *)match)) { | |
226 | r = -EIO; | |
227 | goto out_release; | |
228 | } | |
229 | } | |
230 | ||
231 | match->irq_requested = true; | |
232 | mutex_unlock(&kvm->lock); | |
233 | return r; | |
234 | out_release: | |
235 | mutex_unlock(&kvm->lock); | |
236 | kvm_free_assigned_device(kvm, match); | |
237 | return r; | |
238 | } | |
239 | ||
240 | static int kvm_vm_ioctl_assign_device(struct kvm *kvm, | |
241 | struct kvm_assigned_pci_dev *assigned_dev) | |
242 | { | |
243 | int r = 0; | |
244 | struct kvm_assigned_dev_kernel *match; | |
245 | struct pci_dev *dev; | |
246 | ||
247 | mutex_lock(&kvm->lock); | |
248 | ||
249 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
250 | assigned_dev->assigned_dev_id); | |
251 | if (match) { | |
252 | /* device already assigned */ | |
253 | r = -EINVAL; | |
254 | goto out; | |
255 | } | |
256 | ||
257 | match = kzalloc(sizeof(struct kvm_assigned_dev_kernel), GFP_KERNEL); | |
258 | if (match == NULL) { | |
259 | printk(KERN_INFO "%s: Couldn't allocate memory\n", | |
260 | __func__); | |
261 | r = -ENOMEM; | |
262 | goto out; | |
263 | } | |
264 | dev = pci_get_bus_and_slot(assigned_dev->busnr, | |
265 | assigned_dev->devfn); | |
266 | if (!dev) { | |
267 | printk(KERN_INFO "%s: host device not found\n", __func__); | |
268 | r = -EINVAL; | |
269 | goto out_free; | |
270 | } | |
271 | if (pci_enable_device(dev)) { | |
272 | printk(KERN_INFO "%s: Could not enable PCI device\n", __func__); | |
273 | r = -EBUSY; | |
274 | goto out_put; | |
275 | } | |
276 | r = pci_request_regions(dev, "kvm_assigned_device"); | |
277 | if (r) { | |
278 | printk(KERN_INFO "%s: Could not get access to device regions\n", | |
279 | __func__); | |
280 | goto out_disable; | |
281 | } | |
282 | match->assigned_dev_id = assigned_dev->assigned_dev_id; | |
283 | match->host_busnr = assigned_dev->busnr; | |
284 | match->host_devfn = assigned_dev->devfn; | |
285 | match->dev = dev; | |
286 | ||
287 | match->kvm = kvm; | |
288 | ||
289 | list_add(&match->list, &kvm->arch.assigned_dev_head); | |
290 | ||
291 | if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) { | |
292 | r = kvm_iommu_map_guest(kvm, match); | |
293 | if (r) | |
294 | goto out_list_del; | |
295 | } | |
296 | ||
297 | out: | |
298 | mutex_unlock(&kvm->lock); | |
299 | return r; | |
300 | out_list_del: | |
301 | list_del(&match->list); | |
302 | pci_release_regions(dev); | |
303 | out_disable: | |
304 | pci_disable_device(dev); | |
305 | out_put: | |
306 | pci_dev_put(dev); | |
307 | out_free: | |
308 | kfree(match); | |
309 | mutex_unlock(&kvm->lock); | |
310 | return r; | |
311 | } | |
312 | #endif | |
313 | ||
5aacf0ca JM |
314 | static inline int valid_vcpu(int n) |
315 | { | |
316 | return likely(n >= 0 && n < KVM_MAX_VCPUS); | |
317 | } | |
318 | ||
e5fcfc82 | 319 | static inline int is_mmio_pfn(pfn_t pfn) |
cbff90a7 BAY |
320 | { |
321 | if (pfn_valid(pfn)) | |
322 | return PageReserved(pfn_to_page(pfn)); | |
323 | ||
324 | return true; | |
325 | } | |
326 | ||
bccf2150 AK |
327 | /* |
328 | * Switches to specified vcpu, until a matching vcpu_put() | |
329 | */ | |
313a3dc7 | 330 | void vcpu_load(struct kvm_vcpu *vcpu) |
6aa8b732 | 331 | { |
15ad7146 AK |
332 | int cpu; |
333 | ||
bccf2150 | 334 | mutex_lock(&vcpu->mutex); |
15ad7146 AK |
335 | cpu = get_cpu(); |
336 | preempt_notifier_register(&vcpu->preempt_notifier); | |
313a3dc7 | 337 | kvm_arch_vcpu_load(vcpu, cpu); |
15ad7146 | 338 | put_cpu(); |
6aa8b732 AK |
339 | } |
340 | ||
313a3dc7 | 341 | void vcpu_put(struct kvm_vcpu *vcpu) |
6aa8b732 | 342 | { |
15ad7146 | 343 | preempt_disable(); |
313a3dc7 | 344 | kvm_arch_vcpu_put(vcpu); |
15ad7146 AK |
345 | preempt_notifier_unregister(&vcpu->preempt_notifier); |
346 | preempt_enable(); | |
6aa8b732 AK |
347 | mutex_unlock(&vcpu->mutex); |
348 | } | |
349 | ||
d9e368d6 AK |
350 | static void ack_flush(void *_completed) |
351 | { | |
d9e368d6 AK |
352 | } |
353 | ||
354 | void kvm_flush_remote_tlbs(struct kvm *kvm) | |
355 | { | |
597a5f55 | 356 | int i, cpu, me; |
d9e368d6 AK |
357 | cpumask_t cpus; |
358 | struct kvm_vcpu *vcpu; | |
d9e368d6 | 359 | |
597a5f55 | 360 | me = get_cpu(); |
d9e368d6 | 361 | cpus_clear(cpus); |
fb3f0f51 RR |
362 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
363 | vcpu = kvm->vcpus[i]; | |
364 | if (!vcpu) | |
365 | continue; | |
3176bc3e | 366 | if (test_and_set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests)) |
d9e368d6 AK |
367 | continue; |
368 | cpu = vcpu->cpu; | |
597a5f55 | 369 | if (cpu != -1 && cpu != me) |
49d3bd7e | 370 | cpu_set(cpu, cpus); |
d9e368d6 | 371 | } |
0f74a24c | 372 | if (cpus_empty(cpus)) |
597a5f55 | 373 | goto out; |
0f74a24c | 374 | ++kvm->stat.remote_tlb_flush; |
49d3bd7e | 375 | smp_call_function_mask(cpus, ack_flush, NULL, 1); |
597a5f55 AK |
376 | out: |
377 | put_cpu(); | |
d9e368d6 AK |
378 | } |
379 | ||
2e53d63a MT |
380 | void kvm_reload_remote_mmus(struct kvm *kvm) |
381 | { | |
597a5f55 | 382 | int i, cpu, me; |
2e53d63a MT |
383 | cpumask_t cpus; |
384 | struct kvm_vcpu *vcpu; | |
385 | ||
597a5f55 | 386 | me = get_cpu(); |
2e53d63a MT |
387 | cpus_clear(cpus); |
388 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
389 | vcpu = kvm->vcpus[i]; | |
390 | if (!vcpu) | |
391 | continue; | |
392 | if (test_and_set_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
393 | continue; | |
394 | cpu = vcpu->cpu; | |
597a5f55 | 395 | if (cpu != -1 && cpu != me) |
2e53d63a MT |
396 | cpu_set(cpu, cpus); |
397 | } | |
398 | if (cpus_empty(cpus)) | |
597a5f55 | 399 | goto out; |
2e53d63a | 400 | smp_call_function_mask(cpus, ack_flush, NULL, 1); |
597a5f55 AK |
401 | out: |
402 | put_cpu(); | |
2e53d63a MT |
403 | } |
404 | ||
405 | ||
fb3f0f51 RR |
406 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) |
407 | { | |
408 | struct page *page; | |
409 | int r; | |
410 | ||
411 | mutex_init(&vcpu->mutex); | |
412 | vcpu->cpu = -1; | |
fb3f0f51 RR |
413 | vcpu->kvm = kvm; |
414 | vcpu->vcpu_id = id; | |
b6958ce4 | 415 | init_waitqueue_head(&vcpu->wq); |
fb3f0f51 RR |
416 | |
417 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
418 | if (!page) { | |
419 | r = -ENOMEM; | |
420 | goto fail; | |
421 | } | |
422 | vcpu->run = page_address(page); | |
423 | ||
e9b11c17 | 424 | r = kvm_arch_vcpu_init(vcpu); |
fb3f0f51 | 425 | if (r < 0) |
e9b11c17 | 426 | goto fail_free_run; |
fb3f0f51 RR |
427 | return 0; |
428 | ||
fb3f0f51 RR |
429 | fail_free_run: |
430 | free_page((unsigned long)vcpu->run); | |
431 | fail: | |
76fafa5e | 432 | return r; |
fb3f0f51 RR |
433 | } |
434 | EXPORT_SYMBOL_GPL(kvm_vcpu_init); | |
435 | ||
436 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) | |
437 | { | |
e9b11c17 | 438 | kvm_arch_vcpu_uninit(vcpu); |
fb3f0f51 RR |
439 | free_page((unsigned long)vcpu->run); |
440 | } | |
441 | EXPORT_SYMBOL_GPL(kvm_vcpu_uninit); | |
442 | ||
e930bffe AA |
443 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
444 | static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn) | |
445 | { | |
446 | return container_of(mn, struct kvm, mmu_notifier); | |
447 | } | |
448 | ||
449 | static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn, | |
450 | struct mm_struct *mm, | |
451 | unsigned long address) | |
452 | { | |
453 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
454 | int need_tlb_flush; | |
455 | ||
456 | /* | |
457 | * When ->invalidate_page runs, the linux pte has been zapped | |
458 | * already but the page is still allocated until | |
459 | * ->invalidate_page returns. So if we increase the sequence | |
460 | * here the kvm page fault will notice if the spte can't be | |
461 | * established because the page is going to be freed. If | |
462 | * instead the kvm page fault establishes the spte before | |
463 | * ->invalidate_page runs, kvm_unmap_hva will release it | |
464 | * before returning. | |
465 | * | |
466 | * The sequence increase only need to be seen at spin_unlock | |
467 | * time, and not at spin_lock time. | |
468 | * | |
469 | * Increasing the sequence after the spin_unlock would be | |
470 | * unsafe because the kvm page fault could then establish the | |
471 | * pte after kvm_unmap_hva returned, without noticing the page | |
472 | * is going to be freed. | |
473 | */ | |
474 | spin_lock(&kvm->mmu_lock); | |
475 | kvm->mmu_notifier_seq++; | |
476 | need_tlb_flush = kvm_unmap_hva(kvm, address); | |
477 | spin_unlock(&kvm->mmu_lock); | |
478 | ||
479 | /* we've to flush the tlb before the pages can be freed */ | |
480 | if (need_tlb_flush) | |
481 | kvm_flush_remote_tlbs(kvm); | |
482 | ||
483 | } | |
484 | ||
485 | static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, | |
486 | struct mm_struct *mm, | |
487 | unsigned long start, | |
488 | unsigned long end) | |
489 | { | |
490 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
491 | int need_tlb_flush = 0; | |
492 | ||
493 | spin_lock(&kvm->mmu_lock); | |
494 | /* | |
495 | * The count increase must become visible at unlock time as no | |
496 | * spte can be established without taking the mmu_lock and | |
497 | * count is also read inside the mmu_lock critical section. | |
498 | */ | |
499 | kvm->mmu_notifier_count++; | |
500 | for (; start < end; start += PAGE_SIZE) | |
501 | need_tlb_flush |= kvm_unmap_hva(kvm, start); | |
502 | spin_unlock(&kvm->mmu_lock); | |
503 | ||
504 | /* we've to flush the tlb before the pages can be freed */ | |
505 | if (need_tlb_flush) | |
506 | kvm_flush_remote_tlbs(kvm); | |
507 | } | |
508 | ||
509 | static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn, | |
510 | struct mm_struct *mm, | |
511 | unsigned long start, | |
512 | unsigned long end) | |
513 | { | |
514 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
515 | ||
516 | spin_lock(&kvm->mmu_lock); | |
517 | /* | |
518 | * This sequence increase will notify the kvm page fault that | |
519 | * the page that is going to be mapped in the spte could have | |
520 | * been freed. | |
521 | */ | |
522 | kvm->mmu_notifier_seq++; | |
523 | /* | |
524 | * The above sequence increase must be visible before the | |
525 | * below count decrease but both values are read by the kvm | |
526 | * page fault under mmu_lock spinlock so we don't need to add | |
527 | * a smb_wmb() here in between the two. | |
528 | */ | |
529 | kvm->mmu_notifier_count--; | |
530 | spin_unlock(&kvm->mmu_lock); | |
531 | ||
532 | BUG_ON(kvm->mmu_notifier_count < 0); | |
533 | } | |
534 | ||
535 | static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn, | |
536 | struct mm_struct *mm, | |
537 | unsigned long address) | |
538 | { | |
539 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
540 | int young; | |
541 | ||
542 | spin_lock(&kvm->mmu_lock); | |
543 | young = kvm_age_hva(kvm, address); | |
544 | spin_unlock(&kvm->mmu_lock); | |
545 | ||
546 | if (young) | |
547 | kvm_flush_remote_tlbs(kvm); | |
548 | ||
549 | return young; | |
550 | } | |
551 | ||
552 | static const struct mmu_notifier_ops kvm_mmu_notifier_ops = { | |
553 | .invalidate_page = kvm_mmu_notifier_invalidate_page, | |
554 | .invalidate_range_start = kvm_mmu_notifier_invalidate_range_start, | |
555 | .invalidate_range_end = kvm_mmu_notifier_invalidate_range_end, | |
556 | .clear_flush_young = kvm_mmu_notifier_clear_flush_young, | |
557 | }; | |
558 | #endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */ | |
559 | ||
f17abe9a | 560 | static struct kvm *kvm_create_vm(void) |
6aa8b732 | 561 | { |
d19a9cd2 | 562 | struct kvm *kvm = kvm_arch_create_vm(); |
5f94c174 LV |
563 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
564 | struct page *page; | |
565 | #endif | |
6aa8b732 | 566 | |
d19a9cd2 ZX |
567 | if (IS_ERR(kvm)) |
568 | goto out; | |
6aa8b732 | 569 | |
5f94c174 LV |
570 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
571 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
572 | if (!page) { | |
573 | kfree(kvm); | |
574 | return ERR_PTR(-ENOMEM); | |
575 | } | |
576 | kvm->coalesced_mmio_ring = | |
577 | (struct kvm_coalesced_mmio_ring *)page_address(page); | |
578 | #endif | |
579 | ||
e930bffe AA |
580 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
581 | { | |
582 | int err; | |
583 | kvm->mmu_notifier.ops = &kvm_mmu_notifier_ops; | |
584 | err = mmu_notifier_register(&kvm->mmu_notifier, current->mm); | |
585 | if (err) { | |
586 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
587 | put_page(page); | |
588 | #endif | |
589 | kfree(kvm); | |
590 | return ERR_PTR(err); | |
591 | } | |
592 | } | |
593 | #endif | |
594 | ||
6d4e4c4f AK |
595 | kvm->mm = current->mm; |
596 | atomic_inc(&kvm->mm->mm_count); | |
aaee2c94 | 597 | spin_lock_init(&kvm->mmu_lock); |
74906345 | 598 | kvm_io_bus_init(&kvm->pio_bus); |
11ec2804 | 599 | mutex_init(&kvm->lock); |
2eeb2e94 | 600 | kvm_io_bus_init(&kvm->mmio_bus); |
72dc67a6 | 601 | init_rwsem(&kvm->slots_lock); |
d39f13b0 | 602 | atomic_set(&kvm->users_count, 1); |
5e58cfe4 RR |
603 | spin_lock(&kvm_lock); |
604 | list_add(&kvm->vm_list, &vm_list); | |
605 | spin_unlock(&kvm_lock); | |
5f94c174 LV |
606 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
607 | kvm_coalesced_mmio_init(kvm); | |
608 | #endif | |
d19a9cd2 | 609 | out: |
f17abe9a AK |
610 | return kvm; |
611 | } | |
612 | ||
6aa8b732 AK |
613 | /* |
614 | * Free any memory in @free but not in @dont. | |
615 | */ | |
616 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, | |
617 | struct kvm_memory_slot *dont) | |
618 | { | |
290fc38d IE |
619 | if (!dont || free->rmap != dont->rmap) |
620 | vfree(free->rmap); | |
6aa8b732 AK |
621 | |
622 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) | |
623 | vfree(free->dirty_bitmap); | |
624 | ||
05da4558 MT |
625 | if (!dont || free->lpage_info != dont->lpage_info) |
626 | vfree(free->lpage_info); | |
627 | ||
6aa8b732 | 628 | free->npages = 0; |
8b6d44c7 | 629 | free->dirty_bitmap = NULL; |
8d4e1288 | 630 | free->rmap = NULL; |
05da4558 | 631 | free->lpage_info = NULL; |
6aa8b732 AK |
632 | } |
633 | ||
d19a9cd2 | 634 | void kvm_free_physmem(struct kvm *kvm) |
6aa8b732 AK |
635 | { |
636 | int i; | |
637 | ||
638 | for (i = 0; i < kvm->nmemslots; ++i) | |
8b6d44c7 | 639 | kvm_free_physmem_slot(&kvm->memslots[i], NULL); |
6aa8b732 AK |
640 | } |
641 | ||
f17abe9a AK |
642 | static void kvm_destroy_vm(struct kvm *kvm) |
643 | { | |
6d4e4c4f AK |
644 | struct mm_struct *mm = kvm->mm; |
645 | ||
133de902 AK |
646 | spin_lock(&kvm_lock); |
647 | list_del(&kvm->vm_list); | |
648 | spin_unlock(&kvm_lock); | |
74906345 | 649 | kvm_io_bus_destroy(&kvm->pio_bus); |
2eeb2e94 | 650 | kvm_io_bus_destroy(&kvm->mmio_bus); |
5f94c174 LV |
651 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
652 | if (kvm->coalesced_mmio_ring != NULL) | |
653 | free_page((unsigned long)kvm->coalesced_mmio_ring); | |
e930bffe AA |
654 | #endif |
655 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) | |
656 | mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm); | |
5f94c174 | 657 | #endif |
d19a9cd2 | 658 | kvm_arch_destroy_vm(kvm); |
6d4e4c4f | 659 | mmdrop(mm); |
f17abe9a AK |
660 | } |
661 | ||
d39f13b0 IE |
662 | void kvm_get_kvm(struct kvm *kvm) |
663 | { | |
664 | atomic_inc(&kvm->users_count); | |
665 | } | |
666 | EXPORT_SYMBOL_GPL(kvm_get_kvm); | |
667 | ||
668 | void kvm_put_kvm(struct kvm *kvm) | |
669 | { | |
670 | if (atomic_dec_and_test(&kvm->users_count)) | |
671 | kvm_destroy_vm(kvm); | |
672 | } | |
673 | EXPORT_SYMBOL_GPL(kvm_put_kvm); | |
674 | ||
675 | ||
f17abe9a AK |
676 | static int kvm_vm_release(struct inode *inode, struct file *filp) |
677 | { | |
678 | struct kvm *kvm = filp->private_data; | |
679 | ||
d39f13b0 | 680 | kvm_put_kvm(kvm); |
6aa8b732 AK |
681 | return 0; |
682 | } | |
683 | ||
6aa8b732 AK |
684 | /* |
685 | * Allocate some memory and give it an address in the guest physical address | |
686 | * space. | |
687 | * | |
688 | * Discontiguous memory is allowed, mostly for framebuffers. | |
f78e0e2e | 689 | * |
10589a46 | 690 | * Must be called holding mmap_sem for write. |
6aa8b732 | 691 | */ |
f78e0e2e SY |
692 | int __kvm_set_memory_region(struct kvm *kvm, |
693 | struct kvm_userspace_memory_region *mem, | |
694 | int user_alloc) | |
6aa8b732 AK |
695 | { |
696 | int r; | |
697 | gfn_t base_gfn; | |
698 | unsigned long npages; | |
699 | unsigned long i; | |
700 | struct kvm_memory_slot *memslot; | |
701 | struct kvm_memory_slot old, new; | |
6aa8b732 AK |
702 | |
703 | r = -EINVAL; | |
704 | /* General sanity checks */ | |
705 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
706 | goto out; | |
707 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) | |
708 | goto out; | |
e0d62c7f | 709 | if (mem->slot >= KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS) |
6aa8b732 AK |
710 | goto out; |
711 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) | |
712 | goto out; | |
713 | ||
714 | memslot = &kvm->memslots[mem->slot]; | |
715 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; | |
716 | npages = mem->memory_size >> PAGE_SHIFT; | |
717 | ||
718 | if (!npages) | |
719 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; | |
720 | ||
6aa8b732 AK |
721 | new = old = *memslot; |
722 | ||
723 | new.base_gfn = base_gfn; | |
724 | new.npages = npages; | |
725 | new.flags = mem->flags; | |
726 | ||
727 | /* Disallow changing a memory slot's size. */ | |
728 | r = -EINVAL; | |
729 | if (npages && old.npages && npages != old.npages) | |
f78e0e2e | 730 | goto out_free; |
6aa8b732 AK |
731 | |
732 | /* Check for overlaps */ | |
733 | r = -EEXIST; | |
734 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
735 | struct kvm_memory_slot *s = &kvm->memslots[i]; | |
736 | ||
737 | if (s == memslot) | |
738 | continue; | |
739 | if (!((base_gfn + npages <= s->base_gfn) || | |
740 | (base_gfn >= s->base_gfn + s->npages))) | |
f78e0e2e | 741 | goto out_free; |
6aa8b732 | 742 | } |
6aa8b732 | 743 | |
6aa8b732 AK |
744 | /* Free page dirty bitmap if unneeded */ |
745 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8b6d44c7 | 746 | new.dirty_bitmap = NULL; |
6aa8b732 AK |
747 | |
748 | r = -ENOMEM; | |
749 | ||
750 | /* Allocate if a slot is being created */ | |
eff0114a | 751 | #ifndef CONFIG_S390 |
8d4e1288 | 752 | if (npages && !new.rmap) { |
d77c26fc | 753 | new.rmap = vmalloc(npages * sizeof(struct page *)); |
290fc38d IE |
754 | |
755 | if (!new.rmap) | |
f78e0e2e | 756 | goto out_free; |
290fc38d | 757 | |
290fc38d | 758 | memset(new.rmap, 0, npages * sizeof(*new.rmap)); |
8d4e1288 | 759 | |
80b14b5b | 760 | new.user_alloc = user_alloc; |
604b38ac AA |
761 | /* |
762 | * hva_to_rmmap() serialzies with the mmu_lock and to be | |
763 | * safe it has to ignore memslots with !user_alloc && | |
764 | * !userspace_addr. | |
765 | */ | |
766 | if (user_alloc) | |
767 | new.userspace_addr = mem->userspace_addr; | |
768 | else | |
769 | new.userspace_addr = 0; | |
6aa8b732 | 770 | } |
05da4558 MT |
771 | if (npages && !new.lpage_info) { |
772 | int largepages = npages / KVM_PAGES_PER_HPAGE; | |
773 | if (npages % KVM_PAGES_PER_HPAGE) | |
774 | largepages++; | |
775 | if (base_gfn % KVM_PAGES_PER_HPAGE) | |
776 | largepages++; | |
777 | ||
778 | new.lpage_info = vmalloc(largepages * sizeof(*new.lpage_info)); | |
779 | ||
780 | if (!new.lpage_info) | |
781 | goto out_free; | |
782 | ||
783 | memset(new.lpage_info, 0, largepages * sizeof(*new.lpage_info)); | |
784 | ||
785 | if (base_gfn % KVM_PAGES_PER_HPAGE) | |
786 | new.lpage_info[0].write_count = 1; | |
787 | if ((base_gfn+npages) % KVM_PAGES_PER_HPAGE) | |
788 | new.lpage_info[largepages-1].write_count = 1; | |
789 | } | |
6aa8b732 AK |
790 | |
791 | /* Allocate page dirty bitmap if needed */ | |
792 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { | |
793 | unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8; | |
794 | ||
795 | new.dirty_bitmap = vmalloc(dirty_bytes); | |
796 | if (!new.dirty_bitmap) | |
f78e0e2e | 797 | goto out_free; |
6aa8b732 AK |
798 | memset(new.dirty_bitmap, 0, dirty_bytes); |
799 | } | |
eff0114a | 800 | #endif /* not defined CONFIG_S390 */ |
6aa8b732 | 801 | |
34d4cb8f MT |
802 | if (!npages) |
803 | kvm_arch_flush_shadow(kvm); | |
804 | ||
604b38ac AA |
805 | spin_lock(&kvm->mmu_lock); |
806 | if (mem->slot >= kvm->nmemslots) | |
807 | kvm->nmemslots = mem->slot + 1; | |
808 | ||
3ad82a7e | 809 | *memslot = new; |
604b38ac | 810 | spin_unlock(&kvm->mmu_lock); |
3ad82a7e | 811 | |
0de10343 ZX |
812 | r = kvm_arch_set_memory_region(kvm, mem, old, user_alloc); |
813 | if (r) { | |
604b38ac | 814 | spin_lock(&kvm->mmu_lock); |
0de10343 | 815 | *memslot = old; |
604b38ac | 816 | spin_unlock(&kvm->mmu_lock); |
0de10343 | 817 | goto out_free; |
82ce2c96 IE |
818 | } |
819 | ||
6aa8b732 | 820 | kvm_free_physmem_slot(&old, &new); |
8a98f664 | 821 | #ifdef CONFIG_DMAR |
62c476c7 BAY |
822 | /* map the pages in iommu page table */ |
823 | r = kvm_iommu_map_pages(kvm, base_gfn, npages); | |
824 | if (r) | |
825 | goto out; | |
8a98f664 | 826 | #endif |
6aa8b732 AK |
827 | return 0; |
828 | ||
f78e0e2e | 829 | out_free: |
6aa8b732 AK |
830 | kvm_free_physmem_slot(&new, &old); |
831 | out: | |
832 | return r; | |
210c7c4d IE |
833 | |
834 | } | |
f78e0e2e SY |
835 | EXPORT_SYMBOL_GPL(__kvm_set_memory_region); |
836 | ||
837 | int kvm_set_memory_region(struct kvm *kvm, | |
838 | struct kvm_userspace_memory_region *mem, | |
839 | int user_alloc) | |
840 | { | |
841 | int r; | |
842 | ||
72dc67a6 | 843 | down_write(&kvm->slots_lock); |
f78e0e2e | 844 | r = __kvm_set_memory_region(kvm, mem, user_alloc); |
72dc67a6 | 845 | up_write(&kvm->slots_lock); |
f78e0e2e SY |
846 | return r; |
847 | } | |
210c7c4d IE |
848 | EXPORT_SYMBOL_GPL(kvm_set_memory_region); |
849 | ||
1fe779f8 CO |
850 | int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
851 | struct | |
852 | kvm_userspace_memory_region *mem, | |
853 | int user_alloc) | |
210c7c4d | 854 | { |
e0d62c7f IE |
855 | if (mem->slot >= KVM_MEMORY_SLOTS) |
856 | return -EINVAL; | |
210c7c4d | 857 | return kvm_set_memory_region(kvm, mem, user_alloc); |
6aa8b732 AK |
858 | } |
859 | ||
5bb064dc ZX |
860 | int kvm_get_dirty_log(struct kvm *kvm, |
861 | struct kvm_dirty_log *log, int *is_dirty) | |
6aa8b732 AK |
862 | { |
863 | struct kvm_memory_slot *memslot; | |
864 | int r, i; | |
865 | int n; | |
866 | unsigned long any = 0; | |
867 | ||
6aa8b732 AK |
868 | r = -EINVAL; |
869 | if (log->slot >= KVM_MEMORY_SLOTS) | |
870 | goto out; | |
871 | ||
872 | memslot = &kvm->memslots[log->slot]; | |
873 | r = -ENOENT; | |
874 | if (!memslot->dirty_bitmap) | |
875 | goto out; | |
876 | ||
cd1a4a98 | 877 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
6aa8b732 | 878 | |
cd1a4a98 | 879 | for (i = 0; !any && i < n/sizeof(long); ++i) |
6aa8b732 AK |
880 | any = memslot->dirty_bitmap[i]; |
881 | ||
882 | r = -EFAULT; | |
883 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
884 | goto out; | |
885 | ||
5bb064dc ZX |
886 | if (any) |
887 | *is_dirty = 1; | |
6aa8b732 AK |
888 | |
889 | r = 0; | |
6aa8b732 | 890 | out: |
6aa8b732 AK |
891 | return r; |
892 | } | |
893 | ||
cea7bb21 IE |
894 | int is_error_page(struct page *page) |
895 | { | |
896 | return page == bad_page; | |
897 | } | |
898 | EXPORT_SYMBOL_GPL(is_error_page); | |
899 | ||
35149e21 AL |
900 | int is_error_pfn(pfn_t pfn) |
901 | { | |
902 | return pfn == bad_pfn; | |
903 | } | |
904 | EXPORT_SYMBOL_GPL(is_error_pfn); | |
905 | ||
f9d46eb0 IE |
906 | static inline unsigned long bad_hva(void) |
907 | { | |
908 | return PAGE_OFFSET; | |
909 | } | |
910 | ||
911 | int kvm_is_error_hva(unsigned long addr) | |
912 | { | |
913 | return addr == bad_hva(); | |
914 | } | |
915 | EXPORT_SYMBOL_GPL(kvm_is_error_hva); | |
916 | ||
e8207547 | 917 | static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn) |
6aa8b732 AK |
918 | { |
919 | int i; | |
920 | ||
921 | for (i = 0; i < kvm->nmemslots; ++i) { | |
922 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
923 | ||
924 | if (gfn >= memslot->base_gfn | |
925 | && gfn < memslot->base_gfn + memslot->npages) | |
926 | return memslot; | |
927 | } | |
8b6d44c7 | 928 | return NULL; |
6aa8b732 | 929 | } |
e8207547 AK |
930 | |
931 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
932 | { | |
933 | gfn = unalias_gfn(kvm, gfn); | |
934 | return __gfn_to_memslot(kvm, gfn); | |
935 | } | |
6aa8b732 | 936 | |
e0d62c7f IE |
937 | int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn) |
938 | { | |
939 | int i; | |
940 | ||
941 | gfn = unalias_gfn(kvm, gfn); | |
942 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
943 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
944 | ||
945 | if (gfn >= memslot->base_gfn | |
946 | && gfn < memslot->base_gfn + memslot->npages) | |
947 | return 1; | |
948 | } | |
949 | return 0; | |
950 | } | |
951 | EXPORT_SYMBOL_GPL(kvm_is_visible_gfn); | |
952 | ||
05da4558 | 953 | unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn) |
539cb660 IE |
954 | { |
955 | struct kvm_memory_slot *slot; | |
956 | ||
957 | gfn = unalias_gfn(kvm, gfn); | |
958 | slot = __gfn_to_memslot(kvm, gfn); | |
959 | if (!slot) | |
960 | return bad_hva(); | |
961 | return (slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE); | |
962 | } | |
0d150298 | 963 | EXPORT_SYMBOL_GPL(gfn_to_hva); |
539cb660 | 964 | |
35149e21 | 965 | pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn) |
954bbbc2 | 966 | { |
8d4e1288 | 967 | struct page *page[1]; |
539cb660 | 968 | unsigned long addr; |
8d4e1288 | 969 | int npages; |
2e2e3738 | 970 | pfn_t pfn; |
954bbbc2 | 971 | |
60395224 AK |
972 | might_sleep(); |
973 | ||
539cb660 IE |
974 | addr = gfn_to_hva(kvm, gfn); |
975 | if (kvm_is_error_hva(addr)) { | |
8a7ae055 | 976 | get_page(bad_page); |
35149e21 | 977 | return page_to_pfn(bad_page); |
8a7ae055 | 978 | } |
8d4e1288 | 979 | |
4c2155ce | 980 | npages = get_user_pages_fast(addr, 1, 1, page); |
539cb660 | 981 | |
2e2e3738 AL |
982 | if (unlikely(npages != 1)) { |
983 | struct vm_area_struct *vma; | |
984 | ||
4c2155ce | 985 | down_read(¤t->mm->mmap_sem); |
2e2e3738 | 986 | vma = find_vma(current->mm, addr); |
4c2155ce | 987 | |
2e2e3738 AL |
988 | if (vma == NULL || addr < vma->vm_start || |
989 | !(vma->vm_flags & VM_PFNMAP)) { | |
4c2155ce | 990 | up_read(¤t->mm->mmap_sem); |
2e2e3738 AL |
991 | get_page(bad_page); |
992 | return page_to_pfn(bad_page); | |
993 | } | |
994 | ||
995 | pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; | |
4c2155ce | 996 | up_read(¤t->mm->mmap_sem); |
cbff90a7 | 997 | BUG_ON(!is_mmio_pfn(pfn)); |
2e2e3738 AL |
998 | } else |
999 | pfn = page_to_pfn(page[0]); | |
8d4e1288 | 1000 | |
2e2e3738 | 1001 | return pfn; |
35149e21 AL |
1002 | } |
1003 | ||
1004 | EXPORT_SYMBOL_GPL(gfn_to_pfn); | |
1005 | ||
1006 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) | |
1007 | { | |
2e2e3738 AL |
1008 | pfn_t pfn; |
1009 | ||
1010 | pfn = gfn_to_pfn(kvm, gfn); | |
cbff90a7 | 1011 | if (!is_mmio_pfn(pfn)) |
2e2e3738 AL |
1012 | return pfn_to_page(pfn); |
1013 | ||
cbff90a7 | 1014 | WARN_ON(is_mmio_pfn(pfn)); |
2e2e3738 AL |
1015 | |
1016 | get_page(bad_page); | |
1017 | return bad_page; | |
954bbbc2 | 1018 | } |
aab61cc0 | 1019 | |
954bbbc2 AK |
1020 | EXPORT_SYMBOL_GPL(gfn_to_page); |
1021 | ||
b4231d61 IE |
1022 | void kvm_release_page_clean(struct page *page) |
1023 | { | |
35149e21 | 1024 | kvm_release_pfn_clean(page_to_pfn(page)); |
b4231d61 IE |
1025 | } |
1026 | EXPORT_SYMBOL_GPL(kvm_release_page_clean); | |
1027 | ||
35149e21 AL |
1028 | void kvm_release_pfn_clean(pfn_t pfn) |
1029 | { | |
cbff90a7 | 1030 | if (!is_mmio_pfn(pfn)) |
2e2e3738 | 1031 | put_page(pfn_to_page(pfn)); |
35149e21 AL |
1032 | } |
1033 | EXPORT_SYMBOL_GPL(kvm_release_pfn_clean); | |
1034 | ||
b4231d61 | 1035 | void kvm_release_page_dirty(struct page *page) |
8a7ae055 | 1036 | { |
35149e21 AL |
1037 | kvm_release_pfn_dirty(page_to_pfn(page)); |
1038 | } | |
1039 | EXPORT_SYMBOL_GPL(kvm_release_page_dirty); | |
1040 | ||
1041 | void kvm_release_pfn_dirty(pfn_t pfn) | |
1042 | { | |
1043 | kvm_set_pfn_dirty(pfn); | |
1044 | kvm_release_pfn_clean(pfn); | |
1045 | } | |
1046 | EXPORT_SYMBOL_GPL(kvm_release_pfn_dirty); | |
1047 | ||
1048 | void kvm_set_page_dirty(struct page *page) | |
1049 | { | |
1050 | kvm_set_pfn_dirty(page_to_pfn(page)); | |
1051 | } | |
1052 | EXPORT_SYMBOL_GPL(kvm_set_page_dirty); | |
1053 | ||
1054 | void kvm_set_pfn_dirty(pfn_t pfn) | |
1055 | { | |
cbff90a7 | 1056 | if (!is_mmio_pfn(pfn)) { |
2e2e3738 AL |
1057 | struct page *page = pfn_to_page(pfn); |
1058 | if (!PageReserved(page)) | |
1059 | SetPageDirty(page); | |
1060 | } | |
8a7ae055 | 1061 | } |
35149e21 AL |
1062 | EXPORT_SYMBOL_GPL(kvm_set_pfn_dirty); |
1063 | ||
1064 | void kvm_set_pfn_accessed(pfn_t pfn) | |
1065 | { | |
cbff90a7 | 1066 | if (!is_mmio_pfn(pfn)) |
2e2e3738 | 1067 | mark_page_accessed(pfn_to_page(pfn)); |
35149e21 AL |
1068 | } |
1069 | EXPORT_SYMBOL_GPL(kvm_set_pfn_accessed); | |
1070 | ||
1071 | void kvm_get_pfn(pfn_t pfn) | |
1072 | { | |
cbff90a7 | 1073 | if (!is_mmio_pfn(pfn)) |
2e2e3738 | 1074 | get_page(pfn_to_page(pfn)); |
35149e21 AL |
1075 | } |
1076 | EXPORT_SYMBOL_GPL(kvm_get_pfn); | |
8a7ae055 | 1077 | |
195aefde IE |
1078 | static int next_segment(unsigned long len, int offset) |
1079 | { | |
1080 | if (len > PAGE_SIZE - offset) | |
1081 | return PAGE_SIZE - offset; | |
1082 | else | |
1083 | return len; | |
1084 | } | |
1085 | ||
1086 | int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, | |
1087 | int len) | |
1088 | { | |
e0506bcb IE |
1089 | int r; |
1090 | unsigned long addr; | |
195aefde | 1091 | |
e0506bcb IE |
1092 | addr = gfn_to_hva(kvm, gfn); |
1093 | if (kvm_is_error_hva(addr)) | |
1094 | return -EFAULT; | |
1095 | r = copy_from_user(data, (void __user *)addr + offset, len); | |
1096 | if (r) | |
195aefde | 1097 | return -EFAULT; |
195aefde IE |
1098 | return 0; |
1099 | } | |
1100 | EXPORT_SYMBOL_GPL(kvm_read_guest_page); | |
1101 | ||
1102 | int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len) | |
1103 | { | |
1104 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1105 | int seg; | |
1106 | int offset = offset_in_page(gpa); | |
1107 | int ret; | |
1108 | ||
1109 | while ((seg = next_segment(len, offset)) != 0) { | |
1110 | ret = kvm_read_guest_page(kvm, gfn, data, offset, seg); | |
1111 | if (ret < 0) | |
1112 | return ret; | |
1113 | offset = 0; | |
1114 | len -= seg; | |
1115 | data += seg; | |
1116 | ++gfn; | |
1117 | } | |
1118 | return 0; | |
1119 | } | |
1120 | EXPORT_SYMBOL_GPL(kvm_read_guest); | |
1121 | ||
7ec54588 MT |
1122 | int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, |
1123 | unsigned long len) | |
1124 | { | |
1125 | int r; | |
1126 | unsigned long addr; | |
1127 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1128 | int offset = offset_in_page(gpa); | |
1129 | ||
1130 | addr = gfn_to_hva(kvm, gfn); | |
1131 | if (kvm_is_error_hva(addr)) | |
1132 | return -EFAULT; | |
0aac03f0 | 1133 | pagefault_disable(); |
7ec54588 | 1134 | r = __copy_from_user_inatomic(data, (void __user *)addr + offset, len); |
0aac03f0 | 1135 | pagefault_enable(); |
7ec54588 MT |
1136 | if (r) |
1137 | return -EFAULT; | |
1138 | return 0; | |
1139 | } | |
1140 | EXPORT_SYMBOL(kvm_read_guest_atomic); | |
1141 | ||
195aefde IE |
1142 | int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, |
1143 | int offset, int len) | |
1144 | { | |
e0506bcb IE |
1145 | int r; |
1146 | unsigned long addr; | |
195aefde | 1147 | |
e0506bcb IE |
1148 | addr = gfn_to_hva(kvm, gfn); |
1149 | if (kvm_is_error_hva(addr)) | |
1150 | return -EFAULT; | |
1151 | r = copy_to_user((void __user *)addr + offset, data, len); | |
1152 | if (r) | |
195aefde | 1153 | return -EFAULT; |
195aefde IE |
1154 | mark_page_dirty(kvm, gfn); |
1155 | return 0; | |
1156 | } | |
1157 | EXPORT_SYMBOL_GPL(kvm_write_guest_page); | |
1158 | ||
1159 | int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, | |
1160 | unsigned long len) | |
1161 | { | |
1162 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1163 | int seg; | |
1164 | int offset = offset_in_page(gpa); | |
1165 | int ret; | |
1166 | ||
1167 | while ((seg = next_segment(len, offset)) != 0) { | |
1168 | ret = kvm_write_guest_page(kvm, gfn, data, offset, seg); | |
1169 | if (ret < 0) | |
1170 | return ret; | |
1171 | offset = 0; | |
1172 | len -= seg; | |
1173 | data += seg; | |
1174 | ++gfn; | |
1175 | } | |
1176 | return 0; | |
1177 | } | |
1178 | ||
1179 | int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len) | |
1180 | { | |
3e021bf5 | 1181 | return kvm_write_guest_page(kvm, gfn, empty_zero_page, offset, len); |
195aefde IE |
1182 | } |
1183 | EXPORT_SYMBOL_GPL(kvm_clear_guest_page); | |
1184 | ||
1185 | int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len) | |
1186 | { | |
1187 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1188 | int seg; | |
1189 | int offset = offset_in_page(gpa); | |
1190 | int ret; | |
1191 | ||
1192 | while ((seg = next_segment(len, offset)) != 0) { | |
1193 | ret = kvm_clear_guest_page(kvm, gfn, offset, seg); | |
1194 | if (ret < 0) | |
1195 | return ret; | |
1196 | offset = 0; | |
1197 | len -= seg; | |
1198 | ++gfn; | |
1199 | } | |
1200 | return 0; | |
1201 | } | |
1202 | EXPORT_SYMBOL_GPL(kvm_clear_guest); | |
1203 | ||
6aa8b732 AK |
1204 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
1205 | { | |
31389947 | 1206 | struct kvm_memory_slot *memslot; |
6aa8b732 | 1207 | |
3b6fff19 | 1208 | gfn = unalias_gfn(kvm, gfn); |
7e9d619d RR |
1209 | memslot = __gfn_to_memslot(kvm, gfn); |
1210 | if (memslot && memslot->dirty_bitmap) { | |
1211 | unsigned long rel_gfn = gfn - memslot->base_gfn; | |
6aa8b732 | 1212 | |
7e9d619d RR |
1213 | /* avoid RMW */ |
1214 | if (!test_bit(rel_gfn, memslot->dirty_bitmap)) | |
1215 | set_bit(rel_gfn, memslot->dirty_bitmap); | |
6aa8b732 AK |
1216 | } |
1217 | } | |
1218 | ||
b6958ce4 ED |
1219 | /* |
1220 | * The vCPU has executed a HLT instruction with in-kernel mode enabled. | |
1221 | */ | |
8776e519 | 1222 | void kvm_vcpu_block(struct kvm_vcpu *vcpu) |
d3bef15f | 1223 | { |
e5c239cf MT |
1224 | DEFINE_WAIT(wait); |
1225 | ||
1226 | for (;;) { | |
1227 | prepare_to_wait(&vcpu->wq, &wait, TASK_INTERRUPTIBLE); | |
1228 | ||
d7690175 MT |
1229 | if (kvm_cpu_has_interrupt(vcpu) || |
1230 | kvm_cpu_has_pending_timer(vcpu) || | |
1231 | kvm_arch_vcpu_runnable(vcpu)) { | |
1232 | set_bit(KVM_REQ_UNHALT, &vcpu->requests); | |
e5c239cf | 1233 | break; |
d7690175 | 1234 | } |
e5c239cf MT |
1235 | if (signal_pending(current)) |
1236 | break; | |
1237 | ||
b6958ce4 ED |
1238 | vcpu_put(vcpu); |
1239 | schedule(); | |
1240 | vcpu_load(vcpu); | |
1241 | } | |
d3bef15f | 1242 | |
e5c239cf | 1243 | finish_wait(&vcpu->wq, &wait); |
b6958ce4 ED |
1244 | } |
1245 | ||
6aa8b732 AK |
1246 | void kvm_resched(struct kvm_vcpu *vcpu) |
1247 | { | |
3fca0365 YD |
1248 | if (!need_resched()) |
1249 | return; | |
6aa8b732 | 1250 | cond_resched(); |
6aa8b732 AK |
1251 | } |
1252 | EXPORT_SYMBOL_GPL(kvm_resched); | |
1253 | ||
e4a533a4 | 1254 | static int kvm_vcpu_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
9a2bb7f4 AK |
1255 | { |
1256 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; | |
9a2bb7f4 AK |
1257 | struct page *page; |
1258 | ||
e4a533a4 | 1259 | if (vmf->pgoff == 0) |
039576c0 | 1260 | page = virt_to_page(vcpu->run); |
09566765 | 1261 | #ifdef CONFIG_X86 |
e4a533a4 | 1262 | else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET) |
ad312c7c | 1263 | page = virt_to_page(vcpu->arch.pio_data); |
5f94c174 LV |
1264 | #endif |
1265 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
1266 | else if (vmf->pgoff == KVM_COALESCED_MMIO_PAGE_OFFSET) | |
1267 | page = virt_to_page(vcpu->kvm->coalesced_mmio_ring); | |
09566765 | 1268 | #endif |
039576c0 | 1269 | else |
e4a533a4 | 1270 | return VM_FAULT_SIGBUS; |
9a2bb7f4 | 1271 | get_page(page); |
e4a533a4 NP |
1272 | vmf->page = page; |
1273 | return 0; | |
9a2bb7f4 AK |
1274 | } |
1275 | ||
1276 | static struct vm_operations_struct kvm_vcpu_vm_ops = { | |
e4a533a4 | 1277 | .fault = kvm_vcpu_fault, |
9a2bb7f4 AK |
1278 | }; |
1279 | ||
1280 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) | |
1281 | { | |
1282 | vma->vm_ops = &kvm_vcpu_vm_ops; | |
1283 | return 0; | |
1284 | } | |
1285 | ||
bccf2150 AK |
1286 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
1287 | { | |
1288 | struct kvm_vcpu *vcpu = filp->private_data; | |
1289 | ||
66c0b394 | 1290 | kvm_put_kvm(vcpu->kvm); |
bccf2150 AK |
1291 | return 0; |
1292 | } | |
1293 | ||
5c502742 | 1294 | static const struct file_operations kvm_vcpu_fops = { |
bccf2150 AK |
1295 | .release = kvm_vcpu_release, |
1296 | .unlocked_ioctl = kvm_vcpu_ioctl, | |
1297 | .compat_ioctl = kvm_vcpu_ioctl, | |
9a2bb7f4 | 1298 | .mmap = kvm_vcpu_mmap, |
bccf2150 AK |
1299 | }; |
1300 | ||
1301 | /* | |
1302 | * Allocates an inode for the vcpu. | |
1303 | */ | |
1304 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) | |
1305 | { | |
7d9dbca3 | 1306 | int fd = anon_inode_getfd("kvm-vcpu", &kvm_vcpu_fops, vcpu, 0); |
2030a42c | 1307 | if (fd < 0) |
66c0b394 | 1308 | kvm_put_kvm(vcpu->kvm); |
bccf2150 | 1309 | return fd; |
bccf2150 AK |
1310 | } |
1311 | ||
c5ea7660 AK |
1312 | /* |
1313 | * Creates some virtual cpus. Good luck creating more than one. | |
1314 | */ | |
1315 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n) | |
1316 | { | |
1317 | int r; | |
1318 | struct kvm_vcpu *vcpu; | |
1319 | ||
c5ea7660 | 1320 | if (!valid_vcpu(n)) |
fb3f0f51 | 1321 | return -EINVAL; |
c5ea7660 | 1322 | |
e9b11c17 | 1323 | vcpu = kvm_arch_vcpu_create(kvm, n); |
fb3f0f51 RR |
1324 | if (IS_ERR(vcpu)) |
1325 | return PTR_ERR(vcpu); | |
c5ea7660 | 1326 | |
15ad7146 AK |
1327 | preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops); |
1328 | ||
26e5215f AK |
1329 | r = kvm_arch_vcpu_setup(vcpu); |
1330 | if (r) | |
7d8fece6 | 1331 | return r; |
26e5215f | 1332 | |
11ec2804 | 1333 | mutex_lock(&kvm->lock); |
fb3f0f51 RR |
1334 | if (kvm->vcpus[n]) { |
1335 | r = -EEXIST; | |
e9b11c17 | 1336 | goto vcpu_destroy; |
fb3f0f51 RR |
1337 | } |
1338 | kvm->vcpus[n] = vcpu; | |
11ec2804 | 1339 | mutex_unlock(&kvm->lock); |
c5ea7660 | 1340 | |
fb3f0f51 | 1341 | /* Now it's all set up, let userspace reach it */ |
66c0b394 | 1342 | kvm_get_kvm(kvm); |
bccf2150 AK |
1343 | r = create_vcpu_fd(vcpu); |
1344 | if (r < 0) | |
fb3f0f51 RR |
1345 | goto unlink; |
1346 | return r; | |
39c3b86e | 1347 | |
fb3f0f51 | 1348 | unlink: |
11ec2804 | 1349 | mutex_lock(&kvm->lock); |
fb3f0f51 | 1350 | kvm->vcpus[n] = NULL; |
e9b11c17 | 1351 | vcpu_destroy: |
7d8fece6 | 1352 | mutex_unlock(&kvm->lock); |
d40ccc62 | 1353 | kvm_arch_vcpu_destroy(vcpu); |
c5ea7660 AK |
1354 | return r; |
1355 | } | |
1356 | ||
1961d276 AK |
1357 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
1358 | { | |
1359 | if (sigset) { | |
1360 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1361 | vcpu->sigset_active = 1; | |
1362 | vcpu->sigset = *sigset; | |
1363 | } else | |
1364 | vcpu->sigset_active = 0; | |
1365 | return 0; | |
1366 | } | |
1367 | ||
bccf2150 AK |
1368 | static long kvm_vcpu_ioctl(struct file *filp, |
1369 | unsigned int ioctl, unsigned long arg) | |
6aa8b732 | 1370 | { |
bccf2150 | 1371 | struct kvm_vcpu *vcpu = filp->private_data; |
2f366987 | 1372 | void __user *argp = (void __user *)arg; |
313a3dc7 | 1373 | int r; |
fa3795a7 DH |
1374 | struct kvm_fpu *fpu = NULL; |
1375 | struct kvm_sregs *kvm_sregs = NULL; | |
6aa8b732 | 1376 | |
6d4e4c4f AK |
1377 | if (vcpu->kvm->mm != current->mm) |
1378 | return -EIO; | |
6aa8b732 | 1379 | switch (ioctl) { |
9a2bb7f4 | 1380 | case KVM_RUN: |
f0fe5108 AK |
1381 | r = -EINVAL; |
1382 | if (arg) | |
1383 | goto out; | |
b6c7a5dc | 1384 | r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run); |
6aa8b732 | 1385 | break; |
6aa8b732 | 1386 | case KVM_GET_REGS: { |
3e4bb3ac | 1387 | struct kvm_regs *kvm_regs; |
6aa8b732 | 1388 | |
3e4bb3ac XZ |
1389 | r = -ENOMEM; |
1390 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); | |
1391 | if (!kvm_regs) | |
6aa8b732 | 1392 | goto out; |
3e4bb3ac XZ |
1393 | r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs); |
1394 | if (r) | |
1395 | goto out_free1; | |
6aa8b732 | 1396 | r = -EFAULT; |
3e4bb3ac XZ |
1397 | if (copy_to_user(argp, kvm_regs, sizeof(struct kvm_regs))) |
1398 | goto out_free1; | |
6aa8b732 | 1399 | r = 0; |
3e4bb3ac XZ |
1400 | out_free1: |
1401 | kfree(kvm_regs); | |
6aa8b732 AK |
1402 | break; |
1403 | } | |
1404 | case KVM_SET_REGS: { | |
3e4bb3ac | 1405 | struct kvm_regs *kvm_regs; |
6aa8b732 | 1406 | |
3e4bb3ac XZ |
1407 | r = -ENOMEM; |
1408 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); | |
1409 | if (!kvm_regs) | |
6aa8b732 | 1410 | goto out; |
3e4bb3ac XZ |
1411 | r = -EFAULT; |
1412 | if (copy_from_user(kvm_regs, argp, sizeof(struct kvm_regs))) | |
1413 | goto out_free2; | |
1414 | r = kvm_arch_vcpu_ioctl_set_regs(vcpu, kvm_regs); | |
6aa8b732 | 1415 | if (r) |
3e4bb3ac | 1416 | goto out_free2; |
6aa8b732 | 1417 | r = 0; |
3e4bb3ac XZ |
1418 | out_free2: |
1419 | kfree(kvm_regs); | |
6aa8b732 AK |
1420 | break; |
1421 | } | |
1422 | case KVM_GET_SREGS: { | |
fa3795a7 DH |
1423 | kvm_sregs = kzalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
1424 | r = -ENOMEM; | |
1425 | if (!kvm_sregs) | |
1426 | goto out; | |
1427 | r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs); | |
6aa8b732 AK |
1428 | if (r) |
1429 | goto out; | |
1430 | r = -EFAULT; | |
fa3795a7 | 1431 | if (copy_to_user(argp, kvm_sregs, sizeof(struct kvm_sregs))) |
6aa8b732 AK |
1432 | goto out; |
1433 | r = 0; | |
1434 | break; | |
1435 | } | |
1436 | case KVM_SET_SREGS: { | |
fa3795a7 DH |
1437 | kvm_sregs = kmalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
1438 | r = -ENOMEM; | |
1439 | if (!kvm_sregs) | |
1440 | goto out; | |
6aa8b732 | 1441 | r = -EFAULT; |
fa3795a7 | 1442 | if (copy_from_user(kvm_sregs, argp, sizeof(struct kvm_sregs))) |
6aa8b732 | 1443 | goto out; |
fa3795a7 | 1444 | r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs); |
6aa8b732 AK |
1445 | if (r) |
1446 | goto out; | |
1447 | r = 0; | |
1448 | break; | |
1449 | } | |
62d9f0db MT |
1450 | case KVM_GET_MP_STATE: { |
1451 | struct kvm_mp_state mp_state; | |
1452 | ||
1453 | r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state); | |
1454 | if (r) | |
1455 | goto out; | |
1456 | r = -EFAULT; | |
1457 | if (copy_to_user(argp, &mp_state, sizeof mp_state)) | |
1458 | goto out; | |
1459 | r = 0; | |
1460 | break; | |
1461 | } | |
1462 | case KVM_SET_MP_STATE: { | |
1463 | struct kvm_mp_state mp_state; | |
1464 | ||
1465 | r = -EFAULT; | |
1466 | if (copy_from_user(&mp_state, argp, sizeof mp_state)) | |
1467 | goto out; | |
1468 | r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state); | |
1469 | if (r) | |
1470 | goto out; | |
1471 | r = 0; | |
1472 | break; | |
1473 | } | |
6aa8b732 AK |
1474 | case KVM_TRANSLATE: { |
1475 | struct kvm_translation tr; | |
1476 | ||
1477 | r = -EFAULT; | |
2f366987 | 1478 | if (copy_from_user(&tr, argp, sizeof tr)) |
6aa8b732 | 1479 | goto out; |
8b006791 | 1480 | r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr); |
6aa8b732 AK |
1481 | if (r) |
1482 | goto out; | |
1483 | r = -EFAULT; | |
2f366987 | 1484 | if (copy_to_user(argp, &tr, sizeof tr)) |
6aa8b732 AK |
1485 | goto out; |
1486 | r = 0; | |
1487 | break; | |
1488 | } | |
6aa8b732 AK |
1489 | case KVM_DEBUG_GUEST: { |
1490 | struct kvm_debug_guest dbg; | |
1491 | ||
1492 | r = -EFAULT; | |
2f366987 | 1493 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
6aa8b732 | 1494 | goto out; |
b6c7a5dc | 1495 | r = kvm_arch_vcpu_ioctl_debug_guest(vcpu, &dbg); |
6aa8b732 AK |
1496 | if (r) |
1497 | goto out; | |
1498 | r = 0; | |
1499 | break; | |
1500 | } | |
1961d276 AK |
1501 | case KVM_SET_SIGNAL_MASK: { |
1502 | struct kvm_signal_mask __user *sigmask_arg = argp; | |
1503 | struct kvm_signal_mask kvm_sigmask; | |
1504 | sigset_t sigset, *p; | |
1505 | ||
1506 | p = NULL; | |
1507 | if (argp) { | |
1508 | r = -EFAULT; | |
1509 | if (copy_from_user(&kvm_sigmask, argp, | |
1510 | sizeof kvm_sigmask)) | |
1511 | goto out; | |
1512 | r = -EINVAL; | |
1513 | if (kvm_sigmask.len != sizeof sigset) | |
1514 | goto out; | |
1515 | r = -EFAULT; | |
1516 | if (copy_from_user(&sigset, sigmask_arg->sigset, | |
1517 | sizeof sigset)) | |
1518 | goto out; | |
1519 | p = &sigset; | |
1520 | } | |
1521 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); | |
1522 | break; | |
1523 | } | |
b8836737 | 1524 | case KVM_GET_FPU: { |
fa3795a7 DH |
1525 | fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
1526 | r = -ENOMEM; | |
1527 | if (!fpu) | |
1528 | goto out; | |
1529 | r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, fpu); | |
b8836737 AK |
1530 | if (r) |
1531 | goto out; | |
1532 | r = -EFAULT; | |
fa3795a7 | 1533 | if (copy_to_user(argp, fpu, sizeof(struct kvm_fpu))) |
b8836737 AK |
1534 | goto out; |
1535 | r = 0; | |
1536 | break; | |
1537 | } | |
1538 | case KVM_SET_FPU: { | |
fa3795a7 DH |
1539 | fpu = kmalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
1540 | r = -ENOMEM; | |
1541 | if (!fpu) | |
1542 | goto out; | |
b8836737 | 1543 | r = -EFAULT; |
fa3795a7 | 1544 | if (copy_from_user(fpu, argp, sizeof(struct kvm_fpu))) |
b8836737 | 1545 | goto out; |
fa3795a7 | 1546 | r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu); |
b8836737 AK |
1547 | if (r) |
1548 | goto out; | |
1549 | r = 0; | |
1550 | break; | |
1551 | } | |
bccf2150 | 1552 | default: |
313a3dc7 | 1553 | r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
bccf2150 AK |
1554 | } |
1555 | out: | |
fa3795a7 DH |
1556 | kfree(fpu); |
1557 | kfree(kvm_sregs); | |
bccf2150 AK |
1558 | return r; |
1559 | } | |
1560 | ||
1561 | static long kvm_vm_ioctl(struct file *filp, | |
1562 | unsigned int ioctl, unsigned long arg) | |
1563 | { | |
1564 | struct kvm *kvm = filp->private_data; | |
1565 | void __user *argp = (void __user *)arg; | |
1fe779f8 | 1566 | int r; |
bccf2150 | 1567 | |
6d4e4c4f AK |
1568 | if (kvm->mm != current->mm) |
1569 | return -EIO; | |
bccf2150 AK |
1570 | switch (ioctl) { |
1571 | case KVM_CREATE_VCPU: | |
1572 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); | |
1573 | if (r < 0) | |
1574 | goto out; | |
1575 | break; | |
6fc138d2 IE |
1576 | case KVM_SET_USER_MEMORY_REGION: { |
1577 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
1578 | ||
1579 | r = -EFAULT; | |
1580 | if (copy_from_user(&kvm_userspace_mem, argp, | |
1581 | sizeof kvm_userspace_mem)) | |
1582 | goto out; | |
1583 | ||
1584 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1); | |
6aa8b732 AK |
1585 | if (r) |
1586 | goto out; | |
1587 | break; | |
1588 | } | |
1589 | case KVM_GET_DIRTY_LOG: { | |
1590 | struct kvm_dirty_log log; | |
1591 | ||
1592 | r = -EFAULT; | |
2f366987 | 1593 | if (copy_from_user(&log, argp, sizeof log)) |
6aa8b732 | 1594 | goto out; |
2c6f5df9 | 1595 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
6aa8b732 AK |
1596 | if (r) |
1597 | goto out; | |
1598 | break; | |
1599 | } | |
5f94c174 LV |
1600 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
1601 | case KVM_REGISTER_COALESCED_MMIO: { | |
1602 | struct kvm_coalesced_mmio_zone zone; | |
1603 | r = -EFAULT; | |
1604 | if (copy_from_user(&zone, argp, sizeof zone)) | |
1605 | goto out; | |
1606 | r = -ENXIO; | |
1607 | r = kvm_vm_ioctl_register_coalesced_mmio(kvm, &zone); | |
1608 | if (r) | |
1609 | goto out; | |
1610 | r = 0; | |
1611 | break; | |
1612 | } | |
1613 | case KVM_UNREGISTER_COALESCED_MMIO: { | |
1614 | struct kvm_coalesced_mmio_zone zone; | |
1615 | r = -EFAULT; | |
1616 | if (copy_from_user(&zone, argp, sizeof zone)) | |
1617 | goto out; | |
1618 | r = -ENXIO; | |
1619 | r = kvm_vm_ioctl_unregister_coalesced_mmio(kvm, &zone); | |
1620 | if (r) | |
1621 | goto out; | |
1622 | r = 0; | |
1623 | break; | |
1624 | } | |
8a98f664 XZ |
1625 | #endif |
1626 | #ifdef KVM_CAP_DEVICE_ASSIGNMENT | |
1627 | case KVM_ASSIGN_PCI_DEVICE: { | |
1628 | struct kvm_assigned_pci_dev assigned_dev; | |
1629 | ||
1630 | r = -EFAULT; | |
1631 | if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev)) | |
1632 | goto out; | |
1633 | r = kvm_vm_ioctl_assign_device(kvm, &assigned_dev); | |
1634 | if (r) | |
1635 | goto out; | |
1636 | break; | |
1637 | } | |
1638 | case KVM_ASSIGN_IRQ: { | |
1639 | struct kvm_assigned_irq assigned_irq; | |
1640 | ||
1641 | r = -EFAULT; | |
1642 | if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq)) | |
1643 | goto out; | |
1644 | r = kvm_vm_ioctl_assign_irq(kvm, &assigned_irq); | |
1645 | if (r) | |
1646 | goto out; | |
1647 | break; | |
1648 | } | |
5f94c174 | 1649 | #endif |
f17abe9a | 1650 | default: |
1fe779f8 | 1651 | r = kvm_arch_vm_ioctl(filp, ioctl, arg); |
f17abe9a AK |
1652 | } |
1653 | out: | |
1654 | return r; | |
1655 | } | |
1656 | ||
e4a533a4 | 1657 | static int kvm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
f17abe9a | 1658 | { |
777b3f49 MT |
1659 | struct page *page[1]; |
1660 | unsigned long addr; | |
1661 | int npages; | |
1662 | gfn_t gfn = vmf->pgoff; | |
f17abe9a | 1663 | struct kvm *kvm = vma->vm_file->private_data; |
f17abe9a | 1664 | |
777b3f49 MT |
1665 | addr = gfn_to_hva(kvm, gfn); |
1666 | if (kvm_is_error_hva(addr)) | |
e4a533a4 | 1667 | return VM_FAULT_SIGBUS; |
777b3f49 MT |
1668 | |
1669 | npages = get_user_pages(current, current->mm, addr, 1, 1, 0, page, | |
1670 | NULL); | |
1671 | if (unlikely(npages != 1)) | |
e4a533a4 | 1672 | return VM_FAULT_SIGBUS; |
777b3f49 MT |
1673 | |
1674 | vmf->page = page[0]; | |
e4a533a4 | 1675 | return 0; |
f17abe9a AK |
1676 | } |
1677 | ||
1678 | static struct vm_operations_struct kvm_vm_vm_ops = { | |
e4a533a4 | 1679 | .fault = kvm_vm_fault, |
f17abe9a AK |
1680 | }; |
1681 | ||
1682 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) | |
1683 | { | |
1684 | vma->vm_ops = &kvm_vm_vm_ops; | |
1685 | return 0; | |
1686 | } | |
1687 | ||
5c502742 | 1688 | static const struct file_operations kvm_vm_fops = { |
f17abe9a AK |
1689 | .release = kvm_vm_release, |
1690 | .unlocked_ioctl = kvm_vm_ioctl, | |
1691 | .compat_ioctl = kvm_vm_ioctl, | |
1692 | .mmap = kvm_vm_mmap, | |
1693 | }; | |
1694 | ||
1695 | static int kvm_dev_ioctl_create_vm(void) | |
1696 | { | |
2030a42c | 1697 | int fd; |
f17abe9a AK |
1698 | struct kvm *kvm; |
1699 | ||
f17abe9a | 1700 | kvm = kvm_create_vm(); |
d6d28168 AK |
1701 | if (IS_ERR(kvm)) |
1702 | return PTR_ERR(kvm); | |
7d9dbca3 | 1703 | fd = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, 0); |
2030a42c | 1704 | if (fd < 0) |
66c0b394 | 1705 | kvm_put_kvm(kvm); |
f17abe9a | 1706 | |
f17abe9a | 1707 | return fd; |
f17abe9a AK |
1708 | } |
1709 | ||
1710 | static long kvm_dev_ioctl(struct file *filp, | |
1711 | unsigned int ioctl, unsigned long arg) | |
1712 | { | |
07c45a36 | 1713 | long r = -EINVAL; |
f17abe9a AK |
1714 | |
1715 | switch (ioctl) { | |
1716 | case KVM_GET_API_VERSION: | |
f0fe5108 AK |
1717 | r = -EINVAL; |
1718 | if (arg) | |
1719 | goto out; | |
f17abe9a AK |
1720 | r = KVM_API_VERSION; |
1721 | break; | |
1722 | case KVM_CREATE_VM: | |
f0fe5108 AK |
1723 | r = -EINVAL; |
1724 | if (arg) | |
1725 | goto out; | |
f17abe9a AK |
1726 | r = kvm_dev_ioctl_create_vm(); |
1727 | break; | |
018d00d2 | 1728 | case KVM_CHECK_EXTENSION: |
1e1c65e0 | 1729 | r = kvm_dev_ioctl_check_extension(arg); |
5d308f45 | 1730 | break; |
07c45a36 AK |
1731 | case KVM_GET_VCPU_MMAP_SIZE: |
1732 | r = -EINVAL; | |
1733 | if (arg) | |
1734 | goto out; | |
adb1ff46 AK |
1735 | r = PAGE_SIZE; /* struct kvm_run */ |
1736 | #ifdef CONFIG_X86 | |
1737 | r += PAGE_SIZE; /* pio data page */ | |
5f94c174 LV |
1738 | #endif |
1739 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
1740 | r += PAGE_SIZE; /* coalesced mmio ring page */ | |
adb1ff46 | 1741 | #endif |
07c45a36 | 1742 | break; |
d4c9ff2d FEL |
1743 | case KVM_TRACE_ENABLE: |
1744 | case KVM_TRACE_PAUSE: | |
1745 | case KVM_TRACE_DISABLE: | |
1746 | r = kvm_trace_ioctl(ioctl, arg); | |
1747 | break; | |
6aa8b732 | 1748 | default: |
043405e1 | 1749 | return kvm_arch_dev_ioctl(filp, ioctl, arg); |
6aa8b732 AK |
1750 | } |
1751 | out: | |
1752 | return r; | |
1753 | } | |
1754 | ||
6aa8b732 | 1755 | static struct file_operations kvm_chardev_ops = { |
6aa8b732 AK |
1756 | .unlocked_ioctl = kvm_dev_ioctl, |
1757 | .compat_ioctl = kvm_dev_ioctl, | |
6aa8b732 AK |
1758 | }; |
1759 | ||
1760 | static struct miscdevice kvm_dev = { | |
bbe4432e | 1761 | KVM_MINOR, |
6aa8b732 AK |
1762 | "kvm", |
1763 | &kvm_chardev_ops, | |
1764 | }; | |
1765 | ||
1b6c0168 AK |
1766 | static void hardware_enable(void *junk) |
1767 | { | |
1768 | int cpu = raw_smp_processor_id(); | |
1769 | ||
1770 | if (cpu_isset(cpu, cpus_hardware_enabled)) | |
1771 | return; | |
1772 | cpu_set(cpu, cpus_hardware_enabled); | |
e9b11c17 | 1773 | kvm_arch_hardware_enable(NULL); |
1b6c0168 AK |
1774 | } |
1775 | ||
1776 | static void hardware_disable(void *junk) | |
1777 | { | |
1778 | int cpu = raw_smp_processor_id(); | |
1779 | ||
1780 | if (!cpu_isset(cpu, cpus_hardware_enabled)) | |
1781 | return; | |
1782 | cpu_clear(cpu, cpus_hardware_enabled); | |
e9b11c17 | 1783 | kvm_arch_hardware_disable(NULL); |
1b6c0168 AK |
1784 | } |
1785 | ||
774c47f1 AK |
1786 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, |
1787 | void *v) | |
1788 | { | |
1789 | int cpu = (long)v; | |
1790 | ||
1a6f4d7f | 1791 | val &= ~CPU_TASKS_FROZEN; |
774c47f1 | 1792 | switch (val) { |
cec9ad27 | 1793 | case CPU_DYING: |
6ec8a856 AK |
1794 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
1795 | cpu); | |
1796 | hardware_disable(NULL); | |
1797 | break; | |
774c47f1 | 1798 | case CPU_UP_CANCELED: |
43934a38 JK |
1799 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
1800 | cpu); | |
8691e5a8 | 1801 | smp_call_function_single(cpu, hardware_disable, NULL, 1); |
774c47f1 | 1802 | break; |
43934a38 JK |
1803 | case CPU_ONLINE: |
1804 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", | |
1805 | cpu); | |
8691e5a8 | 1806 | smp_call_function_single(cpu, hardware_enable, NULL, 1); |
774c47f1 AK |
1807 | break; |
1808 | } | |
1809 | return NOTIFY_OK; | |
1810 | } | |
1811 | ||
4ecac3fd AK |
1812 | |
1813 | asmlinkage void kvm_handle_fault_on_reboot(void) | |
1814 | { | |
1815 | if (kvm_rebooting) | |
1816 | /* spin while reset goes on */ | |
1817 | while (true) | |
1818 | ; | |
1819 | /* Fault while not rebooting. We want the trace. */ | |
1820 | BUG(); | |
1821 | } | |
1822 | EXPORT_SYMBOL_GPL(kvm_handle_fault_on_reboot); | |
1823 | ||
9a2b85c6 | 1824 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, |
d77c26fc | 1825 | void *v) |
9a2b85c6 RR |
1826 | { |
1827 | if (val == SYS_RESTART) { | |
1828 | /* | |
1829 | * Some (well, at least mine) BIOSes hang on reboot if | |
1830 | * in vmx root mode. | |
1831 | */ | |
1832 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); | |
4ecac3fd | 1833 | kvm_rebooting = true; |
15c8b6c1 | 1834 | on_each_cpu(hardware_disable, NULL, 1); |
9a2b85c6 RR |
1835 | } |
1836 | return NOTIFY_OK; | |
1837 | } | |
1838 | ||
1839 | static struct notifier_block kvm_reboot_notifier = { | |
1840 | .notifier_call = kvm_reboot, | |
1841 | .priority = 0, | |
1842 | }; | |
1843 | ||
2eeb2e94 GH |
1844 | void kvm_io_bus_init(struct kvm_io_bus *bus) |
1845 | { | |
1846 | memset(bus, 0, sizeof(*bus)); | |
1847 | } | |
1848 | ||
1849 | void kvm_io_bus_destroy(struct kvm_io_bus *bus) | |
1850 | { | |
1851 | int i; | |
1852 | ||
1853 | for (i = 0; i < bus->dev_count; i++) { | |
1854 | struct kvm_io_device *pos = bus->devs[i]; | |
1855 | ||
1856 | kvm_iodevice_destructor(pos); | |
1857 | } | |
1858 | } | |
1859 | ||
92760499 LV |
1860 | struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, |
1861 | gpa_t addr, int len, int is_write) | |
2eeb2e94 GH |
1862 | { |
1863 | int i; | |
1864 | ||
1865 | for (i = 0; i < bus->dev_count; i++) { | |
1866 | struct kvm_io_device *pos = bus->devs[i]; | |
1867 | ||
92760499 | 1868 | if (pos->in_range(pos, addr, len, is_write)) |
2eeb2e94 GH |
1869 | return pos; |
1870 | } | |
1871 | ||
1872 | return NULL; | |
1873 | } | |
1874 | ||
1875 | void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev) | |
1876 | { | |
1877 | BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1)); | |
1878 | ||
1879 | bus->devs[bus->dev_count++] = dev; | |
1880 | } | |
1881 | ||
774c47f1 AK |
1882 | static struct notifier_block kvm_cpu_notifier = { |
1883 | .notifier_call = kvm_cpu_hotplug, | |
1884 | .priority = 20, /* must be > scheduler priority */ | |
1885 | }; | |
1886 | ||
8b88b099 | 1887 | static int vm_stat_get(void *_offset, u64 *val) |
ba1389b7 AK |
1888 | { |
1889 | unsigned offset = (long)_offset; | |
ba1389b7 AK |
1890 | struct kvm *kvm; |
1891 | ||
8b88b099 | 1892 | *val = 0; |
ba1389b7 AK |
1893 | spin_lock(&kvm_lock); |
1894 | list_for_each_entry(kvm, &vm_list, vm_list) | |
8b88b099 | 1895 | *val += *(u32 *)((void *)kvm + offset); |
ba1389b7 | 1896 | spin_unlock(&kvm_lock); |
8b88b099 | 1897 | return 0; |
ba1389b7 AK |
1898 | } |
1899 | ||
1900 | DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n"); | |
1901 | ||
8b88b099 | 1902 | static int vcpu_stat_get(void *_offset, u64 *val) |
1165f5fe AK |
1903 | { |
1904 | unsigned offset = (long)_offset; | |
1165f5fe AK |
1905 | struct kvm *kvm; |
1906 | struct kvm_vcpu *vcpu; | |
1907 | int i; | |
1908 | ||
8b88b099 | 1909 | *val = 0; |
1165f5fe AK |
1910 | spin_lock(&kvm_lock); |
1911 | list_for_each_entry(kvm, &vm_list, vm_list) | |
1912 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
fb3f0f51 RR |
1913 | vcpu = kvm->vcpus[i]; |
1914 | if (vcpu) | |
8b88b099 | 1915 | *val += *(u32 *)((void *)vcpu + offset); |
1165f5fe AK |
1916 | } |
1917 | spin_unlock(&kvm_lock); | |
8b88b099 | 1918 | return 0; |
1165f5fe AK |
1919 | } |
1920 | ||
ba1389b7 AK |
1921 | DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n"); |
1922 | ||
1923 | static struct file_operations *stat_fops[] = { | |
1924 | [KVM_STAT_VCPU] = &vcpu_stat_fops, | |
1925 | [KVM_STAT_VM] = &vm_stat_fops, | |
1926 | }; | |
1165f5fe | 1927 | |
a16b043c | 1928 | static void kvm_init_debug(void) |
6aa8b732 AK |
1929 | { |
1930 | struct kvm_stats_debugfs_item *p; | |
1931 | ||
76f7c879 | 1932 | kvm_debugfs_dir = debugfs_create_dir("kvm", NULL); |
6aa8b732 | 1933 | for (p = debugfs_entries; p->name; ++p) |
76f7c879 | 1934 | p->dentry = debugfs_create_file(p->name, 0444, kvm_debugfs_dir, |
1165f5fe | 1935 | (void *)(long)p->offset, |
ba1389b7 | 1936 | stat_fops[p->kind]); |
6aa8b732 AK |
1937 | } |
1938 | ||
1939 | static void kvm_exit_debug(void) | |
1940 | { | |
1941 | struct kvm_stats_debugfs_item *p; | |
1942 | ||
1943 | for (p = debugfs_entries; p->name; ++p) | |
1944 | debugfs_remove(p->dentry); | |
76f7c879 | 1945 | debugfs_remove(kvm_debugfs_dir); |
6aa8b732 AK |
1946 | } |
1947 | ||
59ae6c6b AK |
1948 | static int kvm_suspend(struct sys_device *dev, pm_message_t state) |
1949 | { | |
4267c41a | 1950 | hardware_disable(NULL); |
59ae6c6b AK |
1951 | return 0; |
1952 | } | |
1953 | ||
1954 | static int kvm_resume(struct sys_device *dev) | |
1955 | { | |
4267c41a | 1956 | hardware_enable(NULL); |
59ae6c6b AK |
1957 | return 0; |
1958 | } | |
1959 | ||
1960 | static struct sysdev_class kvm_sysdev_class = { | |
af5ca3f4 | 1961 | .name = "kvm", |
59ae6c6b AK |
1962 | .suspend = kvm_suspend, |
1963 | .resume = kvm_resume, | |
1964 | }; | |
1965 | ||
1966 | static struct sys_device kvm_sysdev = { | |
1967 | .id = 0, | |
1968 | .cls = &kvm_sysdev_class, | |
1969 | }; | |
1970 | ||
cea7bb21 | 1971 | struct page *bad_page; |
35149e21 | 1972 | pfn_t bad_pfn; |
6aa8b732 | 1973 | |
15ad7146 AK |
1974 | static inline |
1975 | struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn) | |
1976 | { | |
1977 | return container_of(pn, struct kvm_vcpu, preempt_notifier); | |
1978 | } | |
1979 | ||
1980 | static void kvm_sched_in(struct preempt_notifier *pn, int cpu) | |
1981 | { | |
1982 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
1983 | ||
e9b11c17 | 1984 | kvm_arch_vcpu_load(vcpu, cpu); |
15ad7146 AK |
1985 | } |
1986 | ||
1987 | static void kvm_sched_out(struct preempt_notifier *pn, | |
1988 | struct task_struct *next) | |
1989 | { | |
1990 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
1991 | ||
e9b11c17 | 1992 | kvm_arch_vcpu_put(vcpu); |
15ad7146 AK |
1993 | } |
1994 | ||
f8c16bba | 1995 | int kvm_init(void *opaque, unsigned int vcpu_size, |
c16f862d | 1996 | struct module *module) |
6aa8b732 AK |
1997 | { |
1998 | int r; | |
002c7f7c | 1999 | int cpu; |
6aa8b732 | 2000 | |
cb498ea2 ZX |
2001 | kvm_init_debug(); |
2002 | ||
f8c16bba ZX |
2003 | r = kvm_arch_init(opaque); |
2004 | if (r) | |
d2308784 | 2005 | goto out_fail; |
cb498ea2 ZX |
2006 | |
2007 | bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
2008 | ||
2009 | if (bad_page == NULL) { | |
2010 | r = -ENOMEM; | |
2011 | goto out; | |
2012 | } | |
2013 | ||
35149e21 AL |
2014 | bad_pfn = page_to_pfn(bad_page); |
2015 | ||
e9b11c17 | 2016 | r = kvm_arch_hardware_setup(); |
6aa8b732 | 2017 | if (r < 0) |
d2308784 | 2018 | goto out_free_0; |
6aa8b732 | 2019 | |
002c7f7c YS |
2020 | for_each_online_cpu(cpu) { |
2021 | smp_call_function_single(cpu, | |
e9b11c17 | 2022 | kvm_arch_check_processor_compat, |
8691e5a8 | 2023 | &r, 1); |
002c7f7c | 2024 | if (r < 0) |
d2308784 | 2025 | goto out_free_1; |
002c7f7c YS |
2026 | } |
2027 | ||
15c8b6c1 | 2028 | on_each_cpu(hardware_enable, NULL, 1); |
774c47f1 AK |
2029 | r = register_cpu_notifier(&kvm_cpu_notifier); |
2030 | if (r) | |
d2308784 | 2031 | goto out_free_2; |
6aa8b732 AK |
2032 | register_reboot_notifier(&kvm_reboot_notifier); |
2033 | ||
59ae6c6b AK |
2034 | r = sysdev_class_register(&kvm_sysdev_class); |
2035 | if (r) | |
d2308784 | 2036 | goto out_free_3; |
59ae6c6b AK |
2037 | |
2038 | r = sysdev_register(&kvm_sysdev); | |
2039 | if (r) | |
d2308784 | 2040 | goto out_free_4; |
59ae6c6b | 2041 | |
c16f862d RR |
2042 | /* A kmem cache lets us meet the alignment requirements of fx_save. */ |
2043 | kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, | |
56919c5c JP |
2044 | __alignof__(struct kvm_vcpu), |
2045 | 0, NULL); | |
c16f862d RR |
2046 | if (!kvm_vcpu_cache) { |
2047 | r = -ENOMEM; | |
d2308784 | 2048 | goto out_free_5; |
c16f862d RR |
2049 | } |
2050 | ||
6aa8b732 AK |
2051 | kvm_chardev_ops.owner = module; |
2052 | ||
2053 | r = misc_register(&kvm_dev); | |
2054 | if (r) { | |
d77c26fc | 2055 | printk(KERN_ERR "kvm: misc device register failed\n"); |
6aa8b732 AK |
2056 | goto out_free; |
2057 | } | |
2058 | ||
15ad7146 AK |
2059 | kvm_preempt_ops.sched_in = kvm_sched_in; |
2060 | kvm_preempt_ops.sched_out = kvm_sched_out; | |
2061 | ||
c7addb90 | 2062 | return 0; |
6aa8b732 AK |
2063 | |
2064 | out_free: | |
c16f862d | 2065 | kmem_cache_destroy(kvm_vcpu_cache); |
d2308784 | 2066 | out_free_5: |
59ae6c6b | 2067 | sysdev_unregister(&kvm_sysdev); |
d2308784 | 2068 | out_free_4: |
59ae6c6b | 2069 | sysdev_class_unregister(&kvm_sysdev_class); |
d2308784 | 2070 | out_free_3: |
6aa8b732 | 2071 | unregister_reboot_notifier(&kvm_reboot_notifier); |
774c47f1 | 2072 | unregister_cpu_notifier(&kvm_cpu_notifier); |
d2308784 | 2073 | out_free_2: |
15c8b6c1 | 2074 | on_each_cpu(hardware_disable, NULL, 1); |
d2308784 | 2075 | out_free_1: |
e9b11c17 | 2076 | kvm_arch_hardware_unsetup(); |
d2308784 ZX |
2077 | out_free_0: |
2078 | __free_page(bad_page); | |
ca45aaae | 2079 | out: |
f8c16bba | 2080 | kvm_arch_exit(); |
cb498ea2 | 2081 | kvm_exit_debug(); |
d2308784 | 2082 | out_fail: |
6aa8b732 AK |
2083 | return r; |
2084 | } | |
cb498ea2 | 2085 | EXPORT_SYMBOL_GPL(kvm_init); |
6aa8b732 | 2086 | |
cb498ea2 | 2087 | void kvm_exit(void) |
6aa8b732 | 2088 | { |
d4c9ff2d | 2089 | kvm_trace_cleanup(); |
6aa8b732 | 2090 | misc_deregister(&kvm_dev); |
c16f862d | 2091 | kmem_cache_destroy(kvm_vcpu_cache); |
59ae6c6b AK |
2092 | sysdev_unregister(&kvm_sysdev); |
2093 | sysdev_class_unregister(&kvm_sysdev_class); | |
6aa8b732 | 2094 | unregister_reboot_notifier(&kvm_reboot_notifier); |
59ae6c6b | 2095 | unregister_cpu_notifier(&kvm_cpu_notifier); |
15c8b6c1 | 2096 | on_each_cpu(hardware_disable, NULL, 1); |
e9b11c17 | 2097 | kvm_arch_hardware_unsetup(); |
f8c16bba | 2098 | kvm_arch_exit(); |
6aa8b732 | 2099 | kvm_exit_debug(); |
cea7bb21 | 2100 | __free_page(bad_page); |
6aa8b732 | 2101 | } |
cb498ea2 | 2102 | EXPORT_SYMBOL_GPL(kvm_exit); |