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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> |
e56d532f | 44 | #include <linux/bitops.h> |
547de29e | 45 | #include <linux/spinlock.h> |
6aa8b732 | 46 | |
e495606d | 47 | #include <asm/processor.h> |
e495606d AK |
48 | #include <asm/io.h> |
49 | #include <asm/uaccess.h> | |
3e021bf5 | 50 | #include <asm/pgtable.h> |
6aa8b732 | 51 | |
5f94c174 LV |
52 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
53 | #include "coalesced_mmio.h" | |
54 | #endif | |
55 | ||
8a98f664 XZ |
56 | #ifdef KVM_CAP_DEVICE_ASSIGNMENT |
57 | #include <linux/pci.h> | |
58 | #include <linux/interrupt.h> | |
59 | #include "irq.h" | |
60 | #endif | |
61 | ||
6aa8b732 AK |
62 | MODULE_AUTHOR("Qumranet"); |
63 | MODULE_LICENSE("GPL"); | |
64 | ||
e9b11c17 ZX |
65 | DEFINE_SPINLOCK(kvm_lock); |
66 | LIST_HEAD(vm_list); | |
133de902 | 67 | |
7f59f492 | 68 | static cpumask_var_t cpus_hardware_enabled; |
1b6c0168 | 69 | |
c16f862d RR |
70 | struct kmem_cache *kvm_vcpu_cache; |
71 | EXPORT_SYMBOL_GPL(kvm_vcpu_cache); | |
1165f5fe | 72 | |
15ad7146 AK |
73 | static __read_mostly struct preempt_ops kvm_preempt_ops; |
74 | ||
76f7c879 | 75 | struct dentry *kvm_debugfs_dir; |
6aa8b732 | 76 | |
bccf2150 AK |
77 | static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, |
78 | unsigned long arg); | |
79 | ||
e8ba5d31 | 80 | static bool kvm_rebooting; |
4ecac3fd | 81 | |
8a98f664 XZ |
82 | #ifdef KVM_CAP_DEVICE_ASSIGNMENT |
83 | static struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head, | |
84 | int assigned_dev_id) | |
85 | { | |
86 | struct list_head *ptr; | |
87 | struct kvm_assigned_dev_kernel *match; | |
88 | ||
89 | list_for_each(ptr, head) { | |
90 | match = list_entry(ptr, struct kvm_assigned_dev_kernel, list); | |
91 | if (match->assigned_dev_id == assigned_dev_id) | |
92 | return match; | |
93 | } | |
94 | return NULL; | |
95 | } | |
96 | ||
2350bd1f SY |
97 | static int find_index_from_host_irq(struct kvm_assigned_dev_kernel |
98 | *assigned_dev, int irq) | |
99 | { | |
100 | int i, index; | |
101 | struct msix_entry *host_msix_entries; | |
102 | ||
103 | host_msix_entries = assigned_dev->host_msix_entries; | |
104 | ||
105 | index = -1; | |
106 | for (i = 0; i < assigned_dev->entries_nr; i++) | |
107 | if (irq == host_msix_entries[i].vector) { | |
108 | index = i; | |
109 | break; | |
110 | } | |
111 | if (index < 0) { | |
112 | printk(KERN_WARNING "Fail to find correlated MSI-X entry!\n"); | |
113 | return 0; | |
114 | } | |
115 | ||
116 | return index; | |
117 | } | |
118 | ||
8a98f664 XZ |
119 | static void kvm_assigned_dev_interrupt_work_handler(struct work_struct *work) |
120 | { | |
121 | struct kvm_assigned_dev_kernel *assigned_dev; | |
2350bd1f | 122 | struct kvm *kvm; |
968a6347 | 123 | int i; |
8a98f664 XZ |
124 | |
125 | assigned_dev = container_of(work, struct kvm_assigned_dev_kernel, | |
126 | interrupt_work); | |
2350bd1f | 127 | kvm = assigned_dev->kvm; |
8a98f664 XZ |
128 | |
129 | /* This is taken to safely inject irq inside the guest. When | |
130 | * the interrupt injection (or the ioapic code) uses a | |
131 | * finer-grained lock, update this | |
132 | */ | |
2350bd1f | 133 | mutex_lock(&kvm->lock); |
547de29e | 134 | spin_lock_irq(&assigned_dev->assigned_dev_lock); |
e56d532f | 135 | if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) { |
2350bd1f SY |
136 | struct kvm_guest_msix_entry *guest_entries = |
137 | assigned_dev->guest_msix_entries; | |
138 | for (i = 0; i < assigned_dev->entries_nr; i++) { | |
139 | if (!(guest_entries[i].flags & | |
140 | KVM_ASSIGNED_MSIX_PENDING)) | |
141 | continue; | |
142 | guest_entries[i].flags &= ~KVM_ASSIGNED_MSIX_PENDING; | |
143 | kvm_set_irq(assigned_dev->kvm, | |
144 | assigned_dev->irq_source_id, | |
145 | guest_entries[i].vector, 1); | |
2350bd1f | 146 | } |
968a6347 | 147 | } else |
2350bd1f SY |
148 | kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id, |
149 | assigned_dev->guest_irq, 1); | |
2350bd1f | 150 | |
547de29e | 151 | spin_unlock_irq(&assigned_dev->assigned_dev_lock); |
8a98f664 | 152 | mutex_unlock(&assigned_dev->kvm->lock); |
8a98f664 XZ |
153 | } |
154 | ||
8a98f664 XZ |
155 | static irqreturn_t kvm_assigned_dev_intr(int irq, void *dev_id) |
156 | { | |
547de29e | 157 | unsigned long flags; |
8a98f664 XZ |
158 | struct kvm_assigned_dev_kernel *assigned_dev = |
159 | (struct kvm_assigned_dev_kernel *) dev_id; | |
160 | ||
547de29e | 161 | spin_lock_irqsave(&assigned_dev->assigned_dev_lock, flags); |
e56d532f | 162 | if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) { |
2350bd1f SY |
163 | int index = find_index_from_host_irq(assigned_dev, irq); |
164 | if (index < 0) | |
547de29e | 165 | goto out; |
2350bd1f SY |
166 | assigned_dev->guest_msix_entries[index].flags |= |
167 | KVM_ASSIGNED_MSIX_PENDING; | |
168 | } | |
169 | ||
8a98f664 | 170 | schedule_work(&assigned_dev->interrupt_work); |
defaf158 | 171 | |
968a6347 SY |
172 | if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_GUEST_INTX) { |
173 | disable_irq_nosync(irq); | |
174 | assigned_dev->host_irq_disabled = true; | |
175 | } | |
defaf158 | 176 | |
547de29e MT |
177 | out: |
178 | spin_unlock_irqrestore(&assigned_dev->assigned_dev_lock, flags); | |
8a98f664 XZ |
179 | return IRQ_HANDLED; |
180 | } | |
181 | ||
182 | /* Ack the irq line for an assigned device */ | |
183 | static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian) | |
184 | { | |
185 | struct kvm_assigned_dev_kernel *dev; | |
547de29e | 186 | unsigned long flags; |
8a98f664 XZ |
187 | |
188 | if (kian->gsi == -1) | |
189 | return; | |
190 | ||
191 | dev = container_of(kian, struct kvm_assigned_dev_kernel, | |
192 | ack_notifier); | |
defaf158 | 193 | |
5550af4d | 194 | kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0); |
defaf158 MM |
195 | |
196 | /* The guest irq may be shared so this ack may be | |
197 | * from another device. | |
198 | */ | |
547de29e | 199 | spin_lock_irqsave(&dev->assigned_dev_lock, flags); |
defaf158 MM |
200 | if (dev->host_irq_disabled) { |
201 | enable_irq(dev->host_irq); | |
202 | dev->host_irq_disabled = false; | |
203 | } | |
547de29e | 204 | spin_unlock_irqrestore(&dev->assigned_dev_lock, flags); |
8a98f664 XZ |
205 | } |
206 | ||
e56d532f SY |
207 | static void deassign_guest_irq(struct kvm *kvm, |
208 | struct kvm_assigned_dev_kernel *assigned_dev) | |
8a98f664 | 209 | { |
e19e30ef | 210 | kvm_unregister_irq_ack_notifier(&assigned_dev->ack_notifier); |
e56d532f | 211 | assigned_dev->ack_notifier.gsi = -1; |
f29b2673 MM |
212 | |
213 | if (assigned_dev->irq_source_id != -1) | |
214 | kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id); | |
215 | assigned_dev->irq_source_id = -1; | |
e56d532f SY |
216 | assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_GUEST_MASK); |
217 | } | |
8a98f664 | 218 | |
e56d532f SY |
219 | /* The function implicit hold kvm->lock mutex due to cancel_work_sync() */ |
220 | static void deassign_host_irq(struct kvm *kvm, | |
221 | struct kvm_assigned_dev_kernel *assigned_dev) | |
222 | { | |
ba4cef31 SY |
223 | /* |
224 | * In kvm_free_device_irq, cancel_work_sync return true if: | |
225 | * 1. work is scheduled, and then cancelled. | |
226 | * 2. work callback is executed. | |
227 | * | |
228 | * The first one ensured that the irq is disabled and no more events | |
229 | * would happen. But for the second one, the irq may be enabled (e.g. | |
230 | * for MSI). So we disable irq here to prevent further events. | |
231 | * | |
232 | * Notice this maybe result in nested disable if the interrupt type is | |
233 | * INTx, but it's OK for we are going to free it. | |
234 | * | |
235 | * If this function is a part of VM destroy, please ensure that till | |
236 | * now, the kvm state is still legal for probably we also have to wait | |
237 | * interrupt_work done. | |
238 | */ | |
e56d532f | 239 | if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) { |
d510d6cc SY |
240 | int i; |
241 | for (i = 0; i < assigned_dev->entries_nr; i++) | |
242 | disable_irq_nosync(assigned_dev-> | |
243 | host_msix_entries[i].vector); | |
244 | ||
245 | cancel_work_sync(&assigned_dev->interrupt_work); | |
246 | ||
247 | for (i = 0; i < assigned_dev->entries_nr; i++) | |
248 | free_irq(assigned_dev->host_msix_entries[i].vector, | |
249 | (void *)assigned_dev); | |
250 | ||
251 | assigned_dev->entries_nr = 0; | |
252 | kfree(assigned_dev->host_msix_entries); | |
253 | kfree(assigned_dev->guest_msix_entries); | |
254 | pci_disable_msix(assigned_dev->dev); | |
255 | } else { | |
256 | /* Deal with MSI and INTx */ | |
257 | disable_irq_nosync(assigned_dev->host_irq); | |
258 | cancel_work_sync(&assigned_dev->interrupt_work); | |
8a98f664 | 259 | |
d510d6cc | 260 | free_irq(assigned_dev->host_irq, (void *)assigned_dev); |
4a643be8 | 261 | |
e56d532f | 262 | if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSI) |
d510d6cc SY |
263 | pci_disable_msi(assigned_dev->dev); |
264 | } | |
4a643be8 | 265 | |
e56d532f SY |
266 | assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_HOST_MASK); |
267 | } | |
268 | ||
269 | static int kvm_deassign_irq(struct kvm *kvm, | |
270 | struct kvm_assigned_dev_kernel *assigned_dev, | |
271 | unsigned long irq_requested_type) | |
272 | { | |
273 | unsigned long guest_irq_type, host_irq_type; | |
274 | ||
275 | if (!irqchip_in_kernel(kvm)) | |
276 | return -EINVAL; | |
277 | /* no irq assignment to deassign */ | |
278 | if (!assigned_dev->irq_requested_type) | |
279 | return -ENXIO; | |
280 | ||
281 | host_irq_type = irq_requested_type & KVM_DEV_IRQ_HOST_MASK; | |
282 | guest_irq_type = irq_requested_type & KVM_DEV_IRQ_GUEST_MASK; | |
283 | ||
284 | if (host_irq_type) | |
285 | deassign_host_irq(kvm, assigned_dev); | |
286 | if (guest_irq_type) | |
287 | deassign_guest_irq(kvm, assigned_dev); | |
288 | ||
289 | return 0; | |
4a643be8 MM |
290 | } |
291 | ||
e56d532f SY |
292 | static void kvm_free_assigned_irq(struct kvm *kvm, |
293 | struct kvm_assigned_dev_kernel *assigned_dev) | |
294 | { | |
295 | kvm_deassign_irq(kvm, assigned_dev, assigned_dev->irq_requested_type); | |
296 | } | |
4a643be8 MM |
297 | |
298 | static void kvm_free_assigned_device(struct kvm *kvm, | |
299 | struct kvm_assigned_dev_kernel | |
300 | *assigned_dev) | |
301 | { | |
302 | kvm_free_assigned_irq(kvm, assigned_dev); | |
303 | ||
6eb55818 SY |
304 | pci_reset_function(assigned_dev->dev); |
305 | ||
8a98f664 XZ |
306 | pci_release_regions(assigned_dev->dev); |
307 | pci_disable_device(assigned_dev->dev); | |
308 | pci_dev_put(assigned_dev->dev); | |
309 | ||
310 | list_del(&assigned_dev->list); | |
311 | kfree(assigned_dev); | |
312 | } | |
313 | ||
314 | void kvm_free_all_assigned_devices(struct kvm *kvm) | |
315 | { | |
316 | struct list_head *ptr, *ptr2; | |
317 | struct kvm_assigned_dev_kernel *assigned_dev; | |
318 | ||
319 | list_for_each_safe(ptr, ptr2, &kvm->arch.assigned_dev_head) { | |
320 | assigned_dev = list_entry(ptr, | |
321 | struct kvm_assigned_dev_kernel, | |
322 | list); | |
323 | ||
324 | kvm_free_assigned_device(kvm, assigned_dev); | |
325 | } | |
326 | } | |
327 | ||
e56d532f SY |
328 | static int assigned_device_enable_host_intx(struct kvm *kvm, |
329 | struct kvm_assigned_dev_kernel *dev) | |
00e3ed39 | 330 | { |
e56d532f SY |
331 | dev->host_irq = dev->dev->irq; |
332 | /* Even though this is PCI, we don't want to use shared | |
333 | * interrupts. Sharing host devices with guest-assigned devices | |
334 | * on the same interrupt line is not a happy situation: there | |
335 | * are going to be long delays in accepting, acking, etc. | |
336 | */ | |
337 | if (request_irq(dev->host_irq, kvm_assigned_dev_intr, | |
338 | 0, "kvm_assigned_intx_device", (void *)dev)) | |
339 | return -EIO; | |
340 | return 0; | |
341 | } | |
6b9cc7fd | 342 | |
e56d532f SY |
343 | #ifdef __KVM_HAVE_MSI |
344 | static int assigned_device_enable_host_msi(struct kvm *kvm, | |
345 | struct kvm_assigned_dev_kernel *dev) | |
346 | { | |
347 | int r; | |
00e3ed39 | 348 | |
e56d532f SY |
349 | if (!dev->dev->msi_enabled) { |
350 | r = pci_enable_msi(dev->dev); | |
351 | if (r) | |
352 | return r; | |
353 | } | |
00e3ed39 | 354 | |
e56d532f SY |
355 | dev->host_irq = dev->dev->irq; |
356 | if (request_irq(dev->host_irq, kvm_assigned_dev_intr, 0, | |
357 | "kvm_assigned_msi_device", (void *)dev)) { | |
358 | pci_disable_msi(dev->dev); | |
359 | return -EIO; | |
00e3ed39 SY |
360 | } |
361 | ||
00e3ed39 SY |
362 | return 0; |
363 | } | |
e56d532f | 364 | #endif |
00e3ed39 | 365 | |
e56d532f SY |
366 | #ifdef __KVM_HAVE_MSIX |
367 | static int assigned_device_enable_host_msix(struct kvm *kvm, | |
368 | struct kvm_assigned_dev_kernel *dev) | |
6b9cc7fd | 369 | { |
e56d532f | 370 | int i, r = -EINVAL; |
6b9cc7fd | 371 | |
e56d532f SY |
372 | /* host_msix_entries and guest_msix_entries should have been |
373 | * initialized */ | |
374 | if (dev->entries_nr == 0) | |
375 | return r; | |
6b9cc7fd | 376 | |
e56d532f SY |
377 | r = pci_enable_msix(dev->dev, dev->host_msix_entries, dev->entries_nr); |
378 | if (r) | |
379 | return r; | |
6b9cc7fd | 380 | |
e56d532f SY |
381 | for (i = 0; i < dev->entries_nr; i++) { |
382 | r = request_irq(dev->host_msix_entries[i].vector, | |
383 | kvm_assigned_dev_intr, 0, | |
384 | "kvm_assigned_msix_device", | |
385 | (void *)dev); | |
386 | /* FIXME: free requested_irq's on failure */ | |
387 | if (r) | |
388 | return r; | |
389 | } | |
5319c662 | 390 | |
e56d532f SY |
391 | return 0; |
392 | } | |
6b9cc7fd | 393 | |
e56d532f | 394 | #endif |
6b9cc7fd | 395 | |
e56d532f SY |
396 | static int assigned_device_enable_guest_intx(struct kvm *kvm, |
397 | struct kvm_assigned_dev_kernel *dev, | |
398 | struct kvm_assigned_irq *irq) | |
399 | { | |
400 | dev->guest_irq = irq->guest_irq; | |
401 | dev->ack_notifier.gsi = irq->guest_irq; | |
402 | return 0; | |
403 | } | |
5319c662 | 404 | |
e56d532f SY |
405 | #ifdef __KVM_HAVE_MSI |
406 | static int assigned_device_enable_guest_msi(struct kvm *kvm, | |
407 | struct kvm_assigned_dev_kernel *dev, | |
408 | struct kvm_assigned_irq *irq) | |
409 | { | |
410 | dev->guest_irq = irq->guest_irq; | |
411 | dev->ack_notifier.gsi = -1; | |
968a6347 | 412 | dev->host_irq_disabled = false; |
6b9cc7fd SY |
413 | return 0; |
414 | } | |
415 | #endif | |
e56d532f SY |
416 | #ifdef __KVM_HAVE_MSIX |
417 | static int assigned_device_enable_guest_msix(struct kvm *kvm, | |
418 | struct kvm_assigned_dev_kernel *dev, | |
419 | struct kvm_assigned_irq *irq) | |
420 | { | |
421 | dev->guest_irq = irq->guest_irq; | |
422 | dev->ack_notifier.gsi = -1; | |
968a6347 | 423 | dev->host_irq_disabled = false; |
e56d532f SY |
424 | return 0; |
425 | } | |
426 | #endif | |
427 | ||
428 | static int assign_host_irq(struct kvm *kvm, | |
429 | struct kvm_assigned_dev_kernel *dev, | |
430 | __u32 host_irq_type) | |
431 | { | |
432 | int r = -EEXIST; | |
433 | ||
434 | if (dev->irq_requested_type & KVM_DEV_IRQ_HOST_MASK) | |
435 | return r; | |
6b9cc7fd | 436 | |
e56d532f SY |
437 | switch (host_irq_type) { |
438 | case KVM_DEV_IRQ_HOST_INTX: | |
439 | r = assigned_device_enable_host_intx(kvm, dev); | |
440 | break; | |
441 | #ifdef __KVM_HAVE_MSI | |
442 | case KVM_DEV_IRQ_HOST_MSI: | |
443 | r = assigned_device_enable_host_msi(kvm, dev); | |
444 | break; | |
445 | #endif | |
d510d6cc | 446 | #ifdef __KVM_HAVE_MSIX |
e56d532f SY |
447 | case KVM_DEV_IRQ_HOST_MSIX: |
448 | r = assigned_device_enable_host_msix(kvm, dev); | |
449 | break; | |
450 | #endif | |
451 | default: | |
452 | r = -EINVAL; | |
453 | } | |
d510d6cc | 454 | |
e56d532f SY |
455 | if (!r) |
456 | dev->irq_requested_type |= host_irq_type; | |
d510d6cc | 457 | |
e56d532f SY |
458 | return r; |
459 | } | |
d510d6cc | 460 | |
e56d532f SY |
461 | static int assign_guest_irq(struct kvm *kvm, |
462 | struct kvm_assigned_dev_kernel *dev, | |
463 | struct kvm_assigned_irq *irq, | |
464 | unsigned long guest_irq_type) | |
465 | { | |
466 | int id; | |
467 | int r = -EEXIST; | |
d510d6cc | 468 | |
e56d532f SY |
469 | if (dev->irq_requested_type & KVM_DEV_IRQ_GUEST_MASK) |
470 | return r; | |
471 | ||
472 | id = kvm_request_irq_source_id(kvm); | |
473 | if (id < 0) | |
474 | return id; | |
475 | ||
476 | dev->irq_source_id = id; | |
477 | ||
478 | switch (guest_irq_type) { | |
479 | case KVM_DEV_IRQ_GUEST_INTX: | |
480 | r = assigned_device_enable_guest_intx(kvm, dev, irq); | |
481 | break; | |
482 | #ifdef __KVM_HAVE_MSI | |
483 | case KVM_DEV_IRQ_GUEST_MSI: | |
484 | r = assigned_device_enable_guest_msi(kvm, dev, irq); | |
485 | break; | |
486 | #endif | |
487 | #ifdef __KVM_HAVE_MSIX | |
488 | case KVM_DEV_IRQ_GUEST_MSIX: | |
489 | r = assigned_device_enable_guest_msix(kvm, dev, irq); | |
490 | break; | |
491 | #endif | |
492 | default: | |
493 | r = -EINVAL; | |
d510d6cc SY |
494 | } |
495 | ||
e56d532f SY |
496 | if (!r) { |
497 | dev->irq_requested_type |= guest_irq_type; | |
498 | kvm_register_irq_ack_notifier(kvm, &dev->ack_notifier); | |
499 | } else | |
500 | kvm_free_irq_source_id(kvm, dev->irq_source_id); | |
d510d6cc | 501 | |
e56d532f | 502 | return r; |
d510d6cc | 503 | } |
d510d6cc | 504 | |
e56d532f | 505 | /* TODO Deal with KVM_DEV_IRQ_ASSIGNED_MASK_MSIX */ |
8a98f664 | 506 | static int kvm_vm_ioctl_assign_irq(struct kvm *kvm, |
e56d532f | 507 | struct kvm_assigned_irq *assigned_irq) |
8a98f664 | 508 | { |
e56d532f | 509 | int r = -EINVAL; |
8a98f664 | 510 | struct kvm_assigned_dev_kernel *match; |
e56d532f | 511 | unsigned long host_irq_type, guest_irq_type; |
8a98f664 | 512 | |
e56d532f SY |
513 | if (!capable(CAP_SYS_RAWIO)) |
514 | return -EPERM; | |
8a98f664 | 515 | |
e56d532f SY |
516 | if (!irqchip_in_kernel(kvm)) |
517 | return r; | |
518 | ||
519 | mutex_lock(&kvm->lock); | |
520 | r = -ENODEV; | |
8a98f664 XZ |
521 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, |
522 | assigned_irq->assigned_dev_id); | |
e56d532f SY |
523 | if (!match) |
524 | goto out; | |
8a98f664 | 525 | |
e56d532f SY |
526 | host_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_HOST_MASK); |
527 | guest_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_GUEST_MASK); | |
17071fe7 | 528 | |
e56d532f SY |
529 | r = -EINVAL; |
530 | /* can only assign one type at a time */ | |
531 | if (hweight_long(host_irq_type) > 1) | |
532 | goto out; | |
533 | if (hweight_long(guest_irq_type) > 1) | |
534 | goto out; | |
535 | if (host_irq_type == 0 && guest_irq_type == 0) | |
536 | goto out; | |
17071fe7 | 537 | |
e56d532f SY |
538 | r = 0; |
539 | if (host_irq_type) | |
540 | r = assign_host_irq(kvm, match, host_irq_type); | |
541 | if (r) | |
542 | goto out; | |
8a98f664 | 543 | |
e56d532f SY |
544 | if (guest_irq_type) |
545 | r = assign_guest_irq(kvm, match, assigned_irq, guest_irq_type); | |
546 | out: | |
8a98f664 XZ |
547 | mutex_unlock(&kvm->lock); |
548 | return r; | |
e56d532f SY |
549 | } |
550 | ||
551 | static int kvm_vm_ioctl_deassign_dev_irq(struct kvm *kvm, | |
552 | struct kvm_assigned_irq | |
553 | *assigned_irq) | |
554 | { | |
555 | int r = -ENODEV; | |
556 | struct kvm_assigned_dev_kernel *match; | |
557 | ||
558 | mutex_lock(&kvm->lock); | |
559 | ||
560 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
561 | assigned_irq->assigned_dev_id); | |
562 | if (!match) | |
563 | goto out; | |
564 | ||
565 | r = kvm_deassign_irq(kvm, match, assigned_irq->flags); | |
566 | out: | |
8a98f664 | 567 | mutex_unlock(&kvm->lock); |
8a98f664 XZ |
568 | return r; |
569 | } | |
570 | ||
571 | static int kvm_vm_ioctl_assign_device(struct kvm *kvm, | |
572 | struct kvm_assigned_pci_dev *assigned_dev) | |
573 | { | |
574 | int r = 0; | |
575 | struct kvm_assigned_dev_kernel *match; | |
576 | struct pci_dev *dev; | |
577 | ||
682edb4c | 578 | down_read(&kvm->slots_lock); |
8a98f664 XZ |
579 | mutex_lock(&kvm->lock); |
580 | ||
581 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
582 | assigned_dev->assigned_dev_id); | |
583 | if (match) { | |
584 | /* device already assigned */ | |
e56d532f | 585 | r = -EEXIST; |
8a98f664 XZ |
586 | goto out; |
587 | } | |
588 | ||
589 | match = kzalloc(sizeof(struct kvm_assigned_dev_kernel), GFP_KERNEL); | |
590 | if (match == NULL) { | |
591 | printk(KERN_INFO "%s: Couldn't allocate memory\n", | |
592 | __func__); | |
593 | r = -ENOMEM; | |
594 | goto out; | |
595 | } | |
596 | dev = pci_get_bus_and_slot(assigned_dev->busnr, | |
597 | assigned_dev->devfn); | |
598 | if (!dev) { | |
599 | printk(KERN_INFO "%s: host device not found\n", __func__); | |
600 | r = -EINVAL; | |
601 | goto out_free; | |
602 | } | |
603 | if (pci_enable_device(dev)) { | |
604 | printk(KERN_INFO "%s: Could not enable PCI device\n", __func__); | |
605 | r = -EBUSY; | |
606 | goto out_put; | |
607 | } | |
608 | r = pci_request_regions(dev, "kvm_assigned_device"); | |
609 | if (r) { | |
610 | printk(KERN_INFO "%s: Could not get access to device regions\n", | |
611 | __func__); | |
612 | goto out_disable; | |
613 | } | |
6eb55818 SY |
614 | |
615 | pci_reset_function(dev); | |
616 | ||
8a98f664 XZ |
617 | match->assigned_dev_id = assigned_dev->assigned_dev_id; |
618 | match->host_busnr = assigned_dev->busnr; | |
619 | match->host_devfn = assigned_dev->devfn; | |
b653574a | 620 | match->flags = assigned_dev->flags; |
8a98f664 | 621 | match->dev = dev; |
547de29e | 622 | spin_lock_init(&match->assigned_dev_lock); |
f29b2673 | 623 | match->irq_source_id = -1; |
8a98f664 | 624 | match->kvm = kvm; |
e56d532f SY |
625 | match->ack_notifier.irq_acked = kvm_assigned_dev_ack_irq; |
626 | INIT_WORK(&match->interrupt_work, | |
627 | kvm_assigned_dev_interrupt_work_handler); | |
8a98f664 XZ |
628 | |
629 | list_add(&match->list, &kvm->arch.assigned_dev_head); | |
630 | ||
631 | if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) { | |
19de40a8 | 632 | if (!kvm->arch.iommu_domain) { |
260782bc WH |
633 | r = kvm_iommu_map_guest(kvm); |
634 | if (r) | |
635 | goto out_list_del; | |
636 | } | |
637 | r = kvm_assign_device(kvm, match); | |
8a98f664 XZ |
638 | if (r) |
639 | goto out_list_del; | |
640 | } | |
641 | ||
642 | out: | |
643 | mutex_unlock(&kvm->lock); | |
682edb4c | 644 | up_read(&kvm->slots_lock); |
8a98f664 XZ |
645 | return r; |
646 | out_list_del: | |
647 | list_del(&match->list); | |
648 | pci_release_regions(dev); | |
649 | out_disable: | |
650 | pci_disable_device(dev); | |
651 | out_put: | |
652 | pci_dev_put(dev); | |
653 | out_free: | |
654 | kfree(match); | |
655 | mutex_unlock(&kvm->lock); | |
682edb4c | 656 | up_read(&kvm->slots_lock); |
8a98f664 XZ |
657 | return r; |
658 | } | |
659 | #endif | |
660 | ||
0a920356 WH |
661 | #ifdef KVM_CAP_DEVICE_DEASSIGNMENT |
662 | static int kvm_vm_ioctl_deassign_device(struct kvm *kvm, | |
663 | struct kvm_assigned_pci_dev *assigned_dev) | |
664 | { | |
665 | int r = 0; | |
666 | struct kvm_assigned_dev_kernel *match; | |
667 | ||
668 | mutex_lock(&kvm->lock); | |
669 | ||
670 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
671 | assigned_dev->assigned_dev_id); | |
672 | if (!match) { | |
673 | printk(KERN_INFO "%s: device hasn't been assigned before, " | |
674 | "so cannot be deassigned\n", __func__); | |
675 | r = -EINVAL; | |
676 | goto out; | |
677 | } | |
678 | ||
4a906e49 | 679 | if (match->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) |
0a920356 WH |
680 | kvm_deassign_device(kvm, match); |
681 | ||
682 | kvm_free_assigned_device(kvm, match); | |
683 | ||
684 | out: | |
685 | mutex_unlock(&kvm->lock); | |
686 | return r; | |
687 | } | |
688 | #endif | |
689 | ||
5aacf0ca JM |
690 | static inline int valid_vcpu(int n) |
691 | { | |
692 | return likely(n >= 0 && n < KVM_MAX_VCPUS); | |
693 | } | |
694 | ||
c77fb9dc | 695 | inline int kvm_is_mmio_pfn(pfn_t pfn) |
cbff90a7 | 696 | { |
fc5659c8 JR |
697 | if (pfn_valid(pfn)) { |
698 | struct page *page = compound_head(pfn_to_page(pfn)); | |
699 | return PageReserved(page); | |
700 | } | |
cbff90a7 BAY |
701 | |
702 | return true; | |
703 | } | |
704 | ||
bccf2150 AK |
705 | /* |
706 | * Switches to specified vcpu, until a matching vcpu_put() | |
707 | */ | |
313a3dc7 | 708 | void vcpu_load(struct kvm_vcpu *vcpu) |
6aa8b732 | 709 | { |
15ad7146 AK |
710 | int cpu; |
711 | ||
bccf2150 | 712 | mutex_lock(&vcpu->mutex); |
15ad7146 AK |
713 | cpu = get_cpu(); |
714 | preempt_notifier_register(&vcpu->preempt_notifier); | |
313a3dc7 | 715 | kvm_arch_vcpu_load(vcpu, cpu); |
15ad7146 | 716 | put_cpu(); |
6aa8b732 AK |
717 | } |
718 | ||
313a3dc7 | 719 | void vcpu_put(struct kvm_vcpu *vcpu) |
6aa8b732 | 720 | { |
15ad7146 | 721 | preempt_disable(); |
313a3dc7 | 722 | kvm_arch_vcpu_put(vcpu); |
15ad7146 AK |
723 | preempt_notifier_unregister(&vcpu->preempt_notifier); |
724 | preempt_enable(); | |
6aa8b732 AK |
725 | mutex_unlock(&vcpu->mutex); |
726 | } | |
727 | ||
d9e368d6 AK |
728 | static void ack_flush(void *_completed) |
729 | { | |
d9e368d6 AK |
730 | } |
731 | ||
49846896 | 732 | static bool make_all_cpus_request(struct kvm *kvm, unsigned int req) |
d9e368d6 | 733 | { |
597a5f55 | 734 | int i, cpu, me; |
6ef7a1bc RR |
735 | cpumask_var_t cpus; |
736 | bool called = true; | |
d9e368d6 | 737 | struct kvm_vcpu *vcpu; |
d9e368d6 | 738 | |
6ef7a1bc RR |
739 | if (alloc_cpumask_var(&cpus, GFP_ATOMIC)) |
740 | cpumask_clear(cpus); | |
741 | ||
597a5f55 | 742 | me = get_cpu(); |
84261923 | 743 | spin_lock(&kvm->requests_lock); |
fb3f0f51 RR |
744 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
745 | vcpu = kvm->vcpus[i]; | |
746 | if (!vcpu) | |
747 | continue; | |
49846896 | 748 | if (test_and_set_bit(req, &vcpu->requests)) |
d9e368d6 AK |
749 | continue; |
750 | cpu = vcpu->cpu; | |
6ef7a1bc RR |
751 | if (cpus != NULL && cpu != -1 && cpu != me) |
752 | cpumask_set_cpu(cpu, cpus); | |
49846896 | 753 | } |
6ef7a1bc RR |
754 | if (unlikely(cpus == NULL)) |
755 | smp_call_function_many(cpu_online_mask, ack_flush, NULL, 1); | |
756 | else if (!cpumask_empty(cpus)) | |
757 | smp_call_function_many(cpus, ack_flush, NULL, 1); | |
758 | else | |
759 | called = false; | |
84261923 | 760 | spin_unlock(&kvm->requests_lock); |
597a5f55 | 761 | put_cpu(); |
6ef7a1bc | 762 | free_cpumask_var(cpus); |
49846896 | 763 | return called; |
d9e368d6 AK |
764 | } |
765 | ||
49846896 | 766 | void kvm_flush_remote_tlbs(struct kvm *kvm) |
2e53d63a | 767 | { |
49846896 RR |
768 | if (make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH)) |
769 | ++kvm->stat.remote_tlb_flush; | |
2e53d63a MT |
770 | } |
771 | ||
49846896 RR |
772 | void kvm_reload_remote_mmus(struct kvm *kvm) |
773 | { | |
774 | make_all_cpus_request(kvm, KVM_REQ_MMU_RELOAD); | |
775 | } | |
2e53d63a | 776 | |
fb3f0f51 RR |
777 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) |
778 | { | |
779 | struct page *page; | |
780 | int r; | |
781 | ||
782 | mutex_init(&vcpu->mutex); | |
783 | vcpu->cpu = -1; | |
fb3f0f51 RR |
784 | vcpu->kvm = kvm; |
785 | vcpu->vcpu_id = id; | |
b6958ce4 | 786 | init_waitqueue_head(&vcpu->wq); |
fb3f0f51 RR |
787 | |
788 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
789 | if (!page) { | |
790 | r = -ENOMEM; | |
791 | goto fail; | |
792 | } | |
793 | vcpu->run = page_address(page); | |
794 | ||
e9b11c17 | 795 | r = kvm_arch_vcpu_init(vcpu); |
fb3f0f51 | 796 | if (r < 0) |
e9b11c17 | 797 | goto fail_free_run; |
fb3f0f51 RR |
798 | return 0; |
799 | ||
fb3f0f51 RR |
800 | fail_free_run: |
801 | free_page((unsigned long)vcpu->run); | |
802 | fail: | |
76fafa5e | 803 | return r; |
fb3f0f51 RR |
804 | } |
805 | EXPORT_SYMBOL_GPL(kvm_vcpu_init); | |
806 | ||
807 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) | |
808 | { | |
e9b11c17 | 809 | kvm_arch_vcpu_uninit(vcpu); |
fb3f0f51 RR |
810 | free_page((unsigned long)vcpu->run); |
811 | } | |
812 | EXPORT_SYMBOL_GPL(kvm_vcpu_uninit); | |
813 | ||
e930bffe AA |
814 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
815 | static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn) | |
816 | { | |
817 | return container_of(mn, struct kvm, mmu_notifier); | |
818 | } | |
819 | ||
820 | static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn, | |
821 | struct mm_struct *mm, | |
822 | unsigned long address) | |
823 | { | |
824 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
825 | int need_tlb_flush; | |
826 | ||
827 | /* | |
828 | * When ->invalidate_page runs, the linux pte has been zapped | |
829 | * already but the page is still allocated until | |
830 | * ->invalidate_page returns. So if we increase the sequence | |
831 | * here the kvm page fault will notice if the spte can't be | |
832 | * established because the page is going to be freed. If | |
833 | * instead the kvm page fault establishes the spte before | |
834 | * ->invalidate_page runs, kvm_unmap_hva will release it | |
835 | * before returning. | |
836 | * | |
837 | * The sequence increase only need to be seen at spin_unlock | |
838 | * time, and not at spin_lock time. | |
839 | * | |
840 | * Increasing the sequence after the spin_unlock would be | |
841 | * unsafe because the kvm page fault could then establish the | |
842 | * pte after kvm_unmap_hva returned, without noticing the page | |
843 | * is going to be freed. | |
844 | */ | |
845 | spin_lock(&kvm->mmu_lock); | |
846 | kvm->mmu_notifier_seq++; | |
847 | need_tlb_flush = kvm_unmap_hva(kvm, address); | |
848 | spin_unlock(&kvm->mmu_lock); | |
849 | ||
850 | /* we've to flush the tlb before the pages can be freed */ | |
851 | if (need_tlb_flush) | |
852 | kvm_flush_remote_tlbs(kvm); | |
853 | ||
854 | } | |
855 | ||
856 | static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, | |
857 | struct mm_struct *mm, | |
858 | unsigned long start, | |
859 | unsigned long end) | |
860 | { | |
861 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
862 | int need_tlb_flush = 0; | |
863 | ||
864 | spin_lock(&kvm->mmu_lock); | |
865 | /* | |
866 | * The count increase must become visible at unlock time as no | |
867 | * spte can be established without taking the mmu_lock and | |
868 | * count is also read inside the mmu_lock critical section. | |
869 | */ | |
870 | kvm->mmu_notifier_count++; | |
871 | for (; start < end; start += PAGE_SIZE) | |
872 | need_tlb_flush |= kvm_unmap_hva(kvm, start); | |
873 | spin_unlock(&kvm->mmu_lock); | |
874 | ||
875 | /* we've to flush the tlb before the pages can be freed */ | |
876 | if (need_tlb_flush) | |
877 | kvm_flush_remote_tlbs(kvm); | |
878 | } | |
879 | ||
880 | static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn, | |
881 | struct mm_struct *mm, | |
882 | unsigned long start, | |
883 | unsigned long end) | |
884 | { | |
885 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
886 | ||
887 | spin_lock(&kvm->mmu_lock); | |
888 | /* | |
889 | * This sequence increase will notify the kvm page fault that | |
890 | * the page that is going to be mapped in the spte could have | |
891 | * been freed. | |
892 | */ | |
893 | kvm->mmu_notifier_seq++; | |
894 | /* | |
895 | * The above sequence increase must be visible before the | |
896 | * below count decrease but both values are read by the kvm | |
897 | * page fault under mmu_lock spinlock so we don't need to add | |
898 | * a smb_wmb() here in between the two. | |
899 | */ | |
900 | kvm->mmu_notifier_count--; | |
901 | spin_unlock(&kvm->mmu_lock); | |
902 | ||
903 | BUG_ON(kvm->mmu_notifier_count < 0); | |
904 | } | |
905 | ||
906 | static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn, | |
907 | struct mm_struct *mm, | |
908 | unsigned long address) | |
909 | { | |
910 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
911 | int young; | |
912 | ||
913 | spin_lock(&kvm->mmu_lock); | |
914 | young = kvm_age_hva(kvm, address); | |
915 | spin_unlock(&kvm->mmu_lock); | |
916 | ||
917 | if (young) | |
918 | kvm_flush_remote_tlbs(kvm); | |
919 | ||
920 | return young; | |
921 | } | |
922 | ||
85db06e5 MT |
923 | static void kvm_mmu_notifier_release(struct mmu_notifier *mn, |
924 | struct mm_struct *mm) | |
925 | { | |
926 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
927 | kvm_arch_flush_shadow(kvm); | |
928 | } | |
929 | ||
e930bffe AA |
930 | static const struct mmu_notifier_ops kvm_mmu_notifier_ops = { |
931 | .invalidate_page = kvm_mmu_notifier_invalidate_page, | |
932 | .invalidate_range_start = kvm_mmu_notifier_invalidate_range_start, | |
933 | .invalidate_range_end = kvm_mmu_notifier_invalidate_range_end, | |
934 | .clear_flush_young = kvm_mmu_notifier_clear_flush_young, | |
85db06e5 | 935 | .release = kvm_mmu_notifier_release, |
e930bffe AA |
936 | }; |
937 | #endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */ | |
938 | ||
f17abe9a | 939 | static struct kvm *kvm_create_vm(void) |
6aa8b732 | 940 | { |
d19a9cd2 | 941 | struct kvm *kvm = kvm_arch_create_vm(); |
5f94c174 LV |
942 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
943 | struct page *page; | |
944 | #endif | |
6aa8b732 | 945 | |
d19a9cd2 ZX |
946 | if (IS_ERR(kvm)) |
947 | goto out; | |
75858a84 | 948 | #ifdef CONFIG_HAVE_KVM_IRQCHIP |
399ec807 | 949 | INIT_LIST_HEAD(&kvm->irq_routing); |
75858a84 AK |
950 | INIT_HLIST_HEAD(&kvm->mask_notifier_list); |
951 | #endif | |
6aa8b732 | 952 | |
5f94c174 LV |
953 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
954 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
955 | if (!page) { | |
956 | kfree(kvm); | |
957 | return ERR_PTR(-ENOMEM); | |
958 | } | |
959 | kvm->coalesced_mmio_ring = | |
960 | (struct kvm_coalesced_mmio_ring *)page_address(page); | |
961 | #endif | |
962 | ||
e930bffe AA |
963 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
964 | { | |
965 | int err; | |
966 | kvm->mmu_notifier.ops = &kvm_mmu_notifier_ops; | |
967 | err = mmu_notifier_register(&kvm->mmu_notifier, current->mm); | |
968 | if (err) { | |
969 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
970 | put_page(page); | |
971 | #endif | |
972 | kfree(kvm); | |
973 | return ERR_PTR(err); | |
974 | } | |
975 | } | |
976 | #endif | |
977 | ||
6d4e4c4f AK |
978 | kvm->mm = current->mm; |
979 | atomic_inc(&kvm->mm->mm_count); | |
aaee2c94 | 980 | spin_lock_init(&kvm->mmu_lock); |
84261923 | 981 | spin_lock_init(&kvm->requests_lock); |
74906345 | 982 | kvm_io_bus_init(&kvm->pio_bus); |
721eecbf | 983 | kvm_irqfd_init(kvm); |
11ec2804 | 984 | mutex_init(&kvm->lock); |
60eead79 | 985 | mutex_init(&kvm->irq_lock); |
2eeb2e94 | 986 | kvm_io_bus_init(&kvm->mmio_bus); |
72dc67a6 | 987 | init_rwsem(&kvm->slots_lock); |
d39f13b0 | 988 | atomic_set(&kvm->users_count, 1); |
5e58cfe4 RR |
989 | spin_lock(&kvm_lock); |
990 | list_add(&kvm->vm_list, &vm_list); | |
991 | spin_unlock(&kvm_lock); | |
5f94c174 LV |
992 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
993 | kvm_coalesced_mmio_init(kvm); | |
994 | #endif | |
d19a9cd2 | 995 | out: |
f17abe9a AK |
996 | return kvm; |
997 | } | |
998 | ||
6aa8b732 AK |
999 | /* |
1000 | * Free any memory in @free but not in @dont. | |
1001 | */ | |
1002 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, | |
1003 | struct kvm_memory_slot *dont) | |
1004 | { | |
290fc38d IE |
1005 | if (!dont || free->rmap != dont->rmap) |
1006 | vfree(free->rmap); | |
6aa8b732 AK |
1007 | |
1008 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) | |
1009 | vfree(free->dirty_bitmap); | |
1010 | ||
05da4558 MT |
1011 | if (!dont || free->lpage_info != dont->lpage_info) |
1012 | vfree(free->lpage_info); | |
1013 | ||
6aa8b732 | 1014 | free->npages = 0; |
8b6d44c7 | 1015 | free->dirty_bitmap = NULL; |
8d4e1288 | 1016 | free->rmap = NULL; |
05da4558 | 1017 | free->lpage_info = NULL; |
6aa8b732 AK |
1018 | } |
1019 | ||
d19a9cd2 | 1020 | void kvm_free_physmem(struct kvm *kvm) |
6aa8b732 AK |
1021 | { |
1022 | int i; | |
1023 | ||
1024 | for (i = 0; i < kvm->nmemslots; ++i) | |
8b6d44c7 | 1025 | kvm_free_physmem_slot(&kvm->memslots[i], NULL); |
6aa8b732 AK |
1026 | } |
1027 | ||
f17abe9a AK |
1028 | static void kvm_destroy_vm(struct kvm *kvm) |
1029 | { | |
6d4e4c4f AK |
1030 | struct mm_struct *mm = kvm->mm; |
1031 | ||
ad8ba2cd | 1032 | kvm_arch_sync_events(kvm); |
133de902 AK |
1033 | spin_lock(&kvm_lock); |
1034 | list_del(&kvm->vm_list); | |
1035 | spin_unlock(&kvm_lock); | |
399ec807 | 1036 | kvm_free_irq_routing(kvm); |
74906345 | 1037 | kvm_io_bus_destroy(&kvm->pio_bus); |
2eeb2e94 | 1038 | kvm_io_bus_destroy(&kvm->mmio_bus); |
5f94c174 LV |
1039 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
1040 | if (kvm->coalesced_mmio_ring != NULL) | |
1041 | free_page((unsigned long)kvm->coalesced_mmio_ring); | |
e930bffe AA |
1042 | #endif |
1043 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) | |
1044 | mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm); | |
f00be0ca GN |
1045 | #else |
1046 | kvm_arch_flush_shadow(kvm); | |
5f94c174 | 1047 | #endif |
d19a9cd2 | 1048 | kvm_arch_destroy_vm(kvm); |
6d4e4c4f | 1049 | mmdrop(mm); |
f17abe9a AK |
1050 | } |
1051 | ||
d39f13b0 IE |
1052 | void kvm_get_kvm(struct kvm *kvm) |
1053 | { | |
1054 | atomic_inc(&kvm->users_count); | |
1055 | } | |
1056 | EXPORT_SYMBOL_GPL(kvm_get_kvm); | |
1057 | ||
1058 | void kvm_put_kvm(struct kvm *kvm) | |
1059 | { | |
1060 | if (atomic_dec_and_test(&kvm->users_count)) | |
1061 | kvm_destroy_vm(kvm); | |
1062 | } | |
1063 | EXPORT_SYMBOL_GPL(kvm_put_kvm); | |
1064 | ||
1065 | ||
f17abe9a AK |
1066 | static int kvm_vm_release(struct inode *inode, struct file *filp) |
1067 | { | |
1068 | struct kvm *kvm = filp->private_data; | |
1069 | ||
721eecbf GH |
1070 | kvm_irqfd_release(kvm); |
1071 | ||
d39f13b0 | 1072 | kvm_put_kvm(kvm); |
6aa8b732 AK |
1073 | return 0; |
1074 | } | |
1075 | ||
6aa8b732 AK |
1076 | /* |
1077 | * Allocate some memory and give it an address in the guest physical address | |
1078 | * space. | |
1079 | * | |
1080 | * Discontiguous memory is allowed, mostly for framebuffers. | |
f78e0e2e | 1081 | * |
10589a46 | 1082 | * Must be called holding mmap_sem for write. |
6aa8b732 | 1083 | */ |
f78e0e2e SY |
1084 | int __kvm_set_memory_region(struct kvm *kvm, |
1085 | struct kvm_userspace_memory_region *mem, | |
1086 | int user_alloc) | |
6aa8b732 AK |
1087 | { |
1088 | int r; | |
1089 | gfn_t base_gfn; | |
ac04527f | 1090 | unsigned long npages, ugfn; |
09f8ca74 | 1091 | unsigned long largepages, i; |
6aa8b732 AK |
1092 | struct kvm_memory_slot *memslot; |
1093 | struct kvm_memory_slot old, new; | |
6aa8b732 AK |
1094 | |
1095 | r = -EINVAL; | |
1096 | /* General sanity checks */ | |
1097 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
1098 | goto out; | |
1099 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) | |
1100 | goto out; | |
e7cacd40 | 1101 | if (user_alloc && (mem->userspace_addr & (PAGE_SIZE - 1))) |
78749809 | 1102 | goto out; |
e0d62c7f | 1103 | if (mem->slot >= KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS) |
6aa8b732 AK |
1104 | goto out; |
1105 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) | |
1106 | goto out; | |
1107 | ||
1108 | memslot = &kvm->memslots[mem->slot]; | |
1109 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; | |
1110 | npages = mem->memory_size >> PAGE_SHIFT; | |
1111 | ||
1112 | if (!npages) | |
1113 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; | |
1114 | ||
6aa8b732 AK |
1115 | new = old = *memslot; |
1116 | ||
1117 | new.base_gfn = base_gfn; | |
1118 | new.npages = npages; | |
1119 | new.flags = mem->flags; | |
1120 | ||
1121 | /* Disallow changing a memory slot's size. */ | |
1122 | r = -EINVAL; | |
1123 | if (npages && old.npages && npages != old.npages) | |
f78e0e2e | 1124 | goto out_free; |
6aa8b732 AK |
1125 | |
1126 | /* Check for overlaps */ | |
1127 | r = -EEXIST; | |
1128 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
1129 | struct kvm_memory_slot *s = &kvm->memslots[i]; | |
1130 | ||
4cd481f6 | 1131 | if (s == memslot || !s->npages) |
6aa8b732 AK |
1132 | continue; |
1133 | if (!((base_gfn + npages <= s->base_gfn) || | |
1134 | (base_gfn >= s->base_gfn + s->npages))) | |
f78e0e2e | 1135 | goto out_free; |
6aa8b732 | 1136 | } |
6aa8b732 | 1137 | |
6aa8b732 AK |
1138 | /* Free page dirty bitmap if unneeded */ |
1139 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8b6d44c7 | 1140 | new.dirty_bitmap = NULL; |
6aa8b732 AK |
1141 | |
1142 | r = -ENOMEM; | |
1143 | ||
1144 | /* Allocate if a slot is being created */ | |
eff0114a | 1145 | #ifndef CONFIG_S390 |
8d4e1288 | 1146 | if (npages && !new.rmap) { |
d77c26fc | 1147 | new.rmap = vmalloc(npages * sizeof(struct page *)); |
290fc38d IE |
1148 | |
1149 | if (!new.rmap) | |
f78e0e2e | 1150 | goto out_free; |
290fc38d | 1151 | |
290fc38d | 1152 | memset(new.rmap, 0, npages * sizeof(*new.rmap)); |
8d4e1288 | 1153 | |
80b14b5b | 1154 | new.user_alloc = user_alloc; |
604b38ac AA |
1155 | /* |
1156 | * hva_to_rmmap() serialzies with the mmu_lock and to be | |
1157 | * safe it has to ignore memslots with !user_alloc && | |
1158 | * !userspace_addr. | |
1159 | */ | |
1160 | if (user_alloc) | |
1161 | new.userspace_addr = mem->userspace_addr; | |
1162 | else | |
1163 | new.userspace_addr = 0; | |
6aa8b732 | 1164 | } |
05da4558 | 1165 | if (npages && !new.lpage_info) { |
99894a79 AK |
1166 | largepages = 1 + (base_gfn + npages - 1) / KVM_PAGES_PER_HPAGE; |
1167 | largepages -= base_gfn / KVM_PAGES_PER_HPAGE; | |
05da4558 MT |
1168 | |
1169 | new.lpage_info = vmalloc(largepages * sizeof(*new.lpage_info)); | |
1170 | ||
1171 | if (!new.lpage_info) | |
1172 | goto out_free; | |
1173 | ||
1174 | memset(new.lpage_info, 0, largepages * sizeof(*new.lpage_info)); | |
1175 | ||
1176 | if (base_gfn % KVM_PAGES_PER_HPAGE) | |
1177 | new.lpage_info[0].write_count = 1; | |
1178 | if ((base_gfn+npages) % KVM_PAGES_PER_HPAGE) | |
1179 | new.lpage_info[largepages-1].write_count = 1; | |
ac04527f AK |
1180 | ugfn = new.userspace_addr >> PAGE_SHIFT; |
1181 | /* | |
1182 | * If the gfn and userspace address are not aligned wrt each | |
1183 | * other, disable large page support for this slot | |
1184 | */ | |
1185 | if ((base_gfn ^ ugfn) & (KVM_PAGES_PER_HPAGE - 1)) | |
1186 | for (i = 0; i < largepages; ++i) | |
1187 | new.lpage_info[i].write_count = 1; | |
05da4558 | 1188 | } |
6aa8b732 AK |
1189 | |
1190 | /* Allocate page dirty bitmap if needed */ | |
1191 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { | |
1192 | unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8; | |
1193 | ||
1194 | new.dirty_bitmap = vmalloc(dirty_bytes); | |
1195 | if (!new.dirty_bitmap) | |
f78e0e2e | 1196 | goto out_free; |
6aa8b732 | 1197 | memset(new.dirty_bitmap, 0, dirty_bytes); |
e244584f IE |
1198 | if (old.npages) |
1199 | kvm_arch_flush_shadow(kvm); | |
6aa8b732 | 1200 | } |
eff0114a | 1201 | #endif /* not defined CONFIG_S390 */ |
6aa8b732 | 1202 | |
34d4cb8f MT |
1203 | if (!npages) |
1204 | kvm_arch_flush_shadow(kvm); | |
1205 | ||
604b38ac AA |
1206 | spin_lock(&kvm->mmu_lock); |
1207 | if (mem->slot >= kvm->nmemslots) | |
1208 | kvm->nmemslots = mem->slot + 1; | |
1209 | ||
3ad82a7e | 1210 | *memslot = new; |
604b38ac | 1211 | spin_unlock(&kvm->mmu_lock); |
3ad82a7e | 1212 | |
0de10343 ZX |
1213 | r = kvm_arch_set_memory_region(kvm, mem, old, user_alloc); |
1214 | if (r) { | |
604b38ac | 1215 | spin_lock(&kvm->mmu_lock); |
0de10343 | 1216 | *memslot = old; |
604b38ac | 1217 | spin_unlock(&kvm->mmu_lock); |
0de10343 | 1218 | goto out_free; |
82ce2c96 IE |
1219 | } |
1220 | ||
6f897248 GC |
1221 | kvm_free_physmem_slot(&old, npages ? &new : NULL); |
1222 | /* Slot deletion case: we have to update the current slot */ | |
b43b1901 | 1223 | spin_lock(&kvm->mmu_lock); |
6f897248 GC |
1224 | if (!npages) |
1225 | *memslot = old; | |
b43b1901 | 1226 | spin_unlock(&kvm->mmu_lock); |
8a98f664 | 1227 | #ifdef CONFIG_DMAR |
62c476c7 BAY |
1228 | /* map the pages in iommu page table */ |
1229 | r = kvm_iommu_map_pages(kvm, base_gfn, npages); | |
1230 | if (r) | |
1231 | goto out; | |
8a98f664 | 1232 | #endif |
6aa8b732 AK |
1233 | return 0; |
1234 | ||
f78e0e2e | 1235 | out_free: |
6aa8b732 AK |
1236 | kvm_free_physmem_slot(&new, &old); |
1237 | out: | |
1238 | return r; | |
210c7c4d IE |
1239 | |
1240 | } | |
f78e0e2e SY |
1241 | EXPORT_SYMBOL_GPL(__kvm_set_memory_region); |
1242 | ||
1243 | int kvm_set_memory_region(struct kvm *kvm, | |
1244 | struct kvm_userspace_memory_region *mem, | |
1245 | int user_alloc) | |
1246 | { | |
1247 | int r; | |
1248 | ||
72dc67a6 | 1249 | down_write(&kvm->slots_lock); |
f78e0e2e | 1250 | r = __kvm_set_memory_region(kvm, mem, user_alloc); |
72dc67a6 | 1251 | up_write(&kvm->slots_lock); |
f78e0e2e SY |
1252 | return r; |
1253 | } | |
210c7c4d IE |
1254 | EXPORT_SYMBOL_GPL(kvm_set_memory_region); |
1255 | ||
1fe779f8 CO |
1256 | int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
1257 | struct | |
1258 | kvm_userspace_memory_region *mem, | |
1259 | int user_alloc) | |
210c7c4d | 1260 | { |
e0d62c7f IE |
1261 | if (mem->slot >= KVM_MEMORY_SLOTS) |
1262 | return -EINVAL; | |
210c7c4d | 1263 | return kvm_set_memory_region(kvm, mem, user_alloc); |
6aa8b732 AK |
1264 | } |
1265 | ||
5bb064dc ZX |
1266 | int kvm_get_dirty_log(struct kvm *kvm, |
1267 | struct kvm_dirty_log *log, int *is_dirty) | |
6aa8b732 AK |
1268 | { |
1269 | struct kvm_memory_slot *memslot; | |
1270 | int r, i; | |
1271 | int n; | |
1272 | unsigned long any = 0; | |
1273 | ||
6aa8b732 AK |
1274 | r = -EINVAL; |
1275 | if (log->slot >= KVM_MEMORY_SLOTS) | |
1276 | goto out; | |
1277 | ||
1278 | memslot = &kvm->memslots[log->slot]; | |
1279 | r = -ENOENT; | |
1280 | if (!memslot->dirty_bitmap) | |
1281 | goto out; | |
1282 | ||
cd1a4a98 | 1283 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
6aa8b732 | 1284 | |
cd1a4a98 | 1285 | for (i = 0; !any && i < n/sizeof(long); ++i) |
6aa8b732 AK |
1286 | any = memslot->dirty_bitmap[i]; |
1287 | ||
1288 | r = -EFAULT; | |
1289 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
1290 | goto out; | |
1291 | ||
5bb064dc ZX |
1292 | if (any) |
1293 | *is_dirty = 1; | |
6aa8b732 AK |
1294 | |
1295 | r = 0; | |
6aa8b732 | 1296 | out: |
6aa8b732 AK |
1297 | return r; |
1298 | } | |
1299 | ||
cea7bb21 IE |
1300 | int is_error_page(struct page *page) |
1301 | { | |
1302 | return page == bad_page; | |
1303 | } | |
1304 | EXPORT_SYMBOL_GPL(is_error_page); | |
1305 | ||
35149e21 AL |
1306 | int is_error_pfn(pfn_t pfn) |
1307 | { | |
1308 | return pfn == bad_pfn; | |
1309 | } | |
1310 | EXPORT_SYMBOL_GPL(is_error_pfn); | |
1311 | ||
f9d46eb0 IE |
1312 | static inline unsigned long bad_hva(void) |
1313 | { | |
1314 | return PAGE_OFFSET; | |
1315 | } | |
1316 | ||
1317 | int kvm_is_error_hva(unsigned long addr) | |
1318 | { | |
1319 | return addr == bad_hva(); | |
1320 | } | |
1321 | EXPORT_SYMBOL_GPL(kvm_is_error_hva); | |
1322 | ||
2843099f | 1323 | struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn) |
6aa8b732 AK |
1324 | { |
1325 | int i; | |
1326 | ||
1327 | for (i = 0; i < kvm->nmemslots; ++i) { | |
1328 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
1329 | ||
1330 | if (gfn >= memslot->base_gfn | |
1331 | && gfn < memslot->base_gfn + memslot->npages) | |
1332 | return memslot; | |
1333 | } | |
8b6d44c7 | 1334 | return NULL; |
6aa8b732 | 1335 | } |
2843099f | 1336 | EXPORT_SYMBOL_GPL(gfn_to_memslot_unaliased); |
e8207547 AK |
1337 | |
1338 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
1339 | { | |
1340 | gfn = unalias_gfn(kvm, gfn); | |
2843099f | 1341 | return gfn_to_memslot_unaliased(kvm, gfn); |
e8207547 | 1342 | } |
6aa8b732 | 1343 | |
e0d62c7f IE |
1344 | int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn) |
1345 | { | |
1346 | int i; | |
1347 | ||
1348 | gfn = unalias_gfn(kvm, gfn); | |
1349 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
1350 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
1351 | ||
1352 | if (gfn >= memslot->base_gfn | |
1353 | && gfn < memslot->base_gfn + memslot->npages) | |
1354 | return 1; | |
1355 | } | |
1356 | return 0; | |
1357 | } | |
1358 | EXPORT_SYMBOL_GPL(kvm_is_visible_gfn); | |
1359 | ||
05da4558 | 1360 | unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn) |
539cb660 IE |
1361 | { |
1362 | struct kvm_memory_slot *slot; | |
1363 | ||
1364 | gfn = unalias_gfn(kvm, gfn); | |
2843099f | 1365 | slot = gfn_to_memslot_unaliased(kvm, gfn); |
539cb660 IE |
1366 | if (!slot) |
1367 | return bad_hva(); | |
1368 | return (slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE); | |
1369 | } | |
0d150298 | 1370 | EXPORT_SYMBOL_GPL(gfn_to_hva); |
539cb660 | 1371 | |
35149e21 | 1372 | pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn) |
954bbbc2 | 1373 | { |
8d4e1288 | 1374 | struct page *page[1]; |
539cb660 | 1375 | unsigned long addr; |
8d4e1288 | 1376 | int npages; |
2e2e3738 | 1377 | pfn_t pfn; |
954bbbc2 | 1378 | |
60395224 AK |
1379 | might_sleep(); |
1380 | ||
539cb660 IE |
1381 | addr = gfn_to_hva(kvm, gfn); |
1382 | if (kvm_is_error_hva(addr)) { | |
8a7ae055 | 1383 | get_page(bad_page); |
35149e21 | 1384 | return page_to_pfn(bad_page); |
8a7ae055 | 1385 | } |
8d4e1288 | 1386 | |
4c2155ce | 1387 | npages = get_user_pages_fast(addr, 1, 1, page); |
539cb660 | 1388 | |
2e2e3738 AL |
1389 | if (unlikely(npages != 1)) { |
1390 | struct vm_area_struct *vma; | |
1391 | ||
4c2155ce | 1392 | down_read(¤t->mm->mmap_sem); |
2e2e3738 | 1393 | vma = find_vma(current->mm, addr); |
4c2155ce | 1394 | |
2e2e3738 AL |
1395 | if (vma == NULL || addr < vma->vm_start || |
1396 | !(vma->vm_flags & VM_PFNMAP)) { | |
4c2155ce | 1397 | up_read(¤t->mm->mmap_sem); |
2e2e3738 AL |
1398 | get_page(bad_page); |
1399 | return page_to_pfn(bad_page); | |
1400 | } | |
1401 | ||
1402 | pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; | |
4c2155ce | 1403 | up_read(¤t->mm->mmap_sem); |
c77fb9dc | 1404 | BUG_ON(!kvm_is_mmio_pfn(pfn)); |
2e2e3738 AL |
1405 | } else |
1406 | pfn = page_to_pfn(page[0]); | |
8d4e1288 | 1407 | |
2e2e3738 | 1408 | return pfn; |
35149e21 AL |
1409 | } |
1410 | ||
1411 | EXPORT_SYMBOL_GPL(gfn_to_pfn); | |
1412 | ||
1413 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) | |
1414 | { | |
2e2e3738 AL |
1415 | pfn_t pfn; |
1416 | ||
1417 | pfn = gfn_to_pfn(kvm, gfn); | |
c77fb9dc | 1418 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 AL |
1419 | return pfn_to_page(pfn); |
1420 | ||
c77fb9dc | 1421 | WARN_ON(kvm_is_mmio_pfn(pfn)); |
2e2e3738 AL |
1422 | |
1423 | get_page(bad_page); | |
1424 | return bad_page; | |
954bbbc2 | 1425 | } |
aab61cc0 | 1426 | |
954bbbc2 AK |
1427 | EXPORT_SYMBOL_GPL(gfn_to_page); |
1428 | ||
b4231d61 IE |
1429 | void kvm_release_page_clean(struct page *page) |
1430 | { | |
35149e21 | 1431 | kvm_release_pfn_clean(page_to_pfn(page)); |
b4231d61 IE |
1432 | } |
1433 | EXPORT_SYMBOL_GPL(kvm_release_page_clean); | |
1434 | ||
35149e21 AL |
1435 | void kvm_release_pfn_clean(pfn_t pfn) |
1436 | { | |
c77fb9dc | 1437 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 | 1438 | put_page(pfn_to_page(pfn)); |
35149e21 AL |
1439 | } |
1440 | EXPORT_SYMBOL_GPL(kvm_release_pfn_clean); | |
1441 | ||
b4231d61 | 1442 | void kvm_release_page_dirty(struct page *page) |
8a7ae055 | 1443 | { |
35149e21 AL |
1444 | kvm_release_pfn_dirty(page_to_pfn(page)); |
1445 | } | |
1446 | EXPORT_SYMBOL_GPL(kvm_release_page_dirty); | |
1447 | ||
1448 | void kvm_release_pfn_dirty(pfn_t pfn) | |
1449 | { | |
1450 | kvm_set_pfn_dirty(pfn); | |
1451 | kvm_release_pfn_clean(pfn); | |
1452 | } | |
1453 | EXPORT_SYMBOL_GPL(kvm_release_pfn_dirty); | |
1454 | ||
1455 | void kvm_set_page_dirty(struct page *page) | |
1456 | { | |
1457 | kvm_set_pfn_dirty(page_to_pfn(page)); | |
1458 | } | |
1459 | EXPORT_SYMBOL_GPL(kvm_set_page_dirty); | |
1460 | ||
1461 | void kvm_set_pfn_dirty(pfn_t pfn) | |
1462 | { | |
c77fb9dc | 1463 | if (!kvm_is_mmio_pfn(pfn)) { |
2e2e3738 AL |
1464 | struct page *page = pfn_to_page(pfn); |
1465 | if (!PageReserved(page)) | |
1466 | SetPageDirty(page); | |
1467 | } | |
8a7ae055 | 1468 | } |
35149e21 AL |
1469 | EXPORT_SYMBOL_GPL(kvm_set_pfn_dirty); |
1470 | ||
1471 | void kvm_set_pfn_accessed(pfn_t pfn) | |
1472 | { | |
c77fb9dc | 1473 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 | 1474 | mark_page_accessed(pfn_to_page(pfn)); |
35149e21 AL |
1475 | } |
1476 | EXPORT_SYMBOL_GPL(kvm_set_pfn_accessed); | |
1477 | ||
1478 | void kvm_get_pfn(pfn_t pfn) | |
1479 | { | |
c77fb9dc | 1480 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 | 1481 | get_page(pfn_to_page(pfn)); |
35149e21 AL |
1482 | } |
1483 | EXPORT_SYMBOL_GPL(kvm_get_pfn); | |
8a7ae055 | 1484 | |
195aefde IE |
1485 | static int next_segment(unsigned long len, int offset) |
1486 | { | |
1487 | if (len > PAGE_SIZE - offset) | |
1488 | return PAGE_SIZE - offset; | |
1489 | else | |
1490 | return len; | |
1491 | } | |
1492 | ||
1493 | int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, | |
1494 | int len) | |
1495 | { | |
e0506bcb IE |
1496 | int r; |
1497 | unsigned long addr; | |
195aefde | 1498 | |
e0506bcb IE |
1499 | addr = gfn_to_hva(kvm, gfn); |
1500 | if (kvm_is_error_hva(addr)) | |
1501 | return -EFAULT; | |
1502 | r = copy_from_user(data, (void __user *)addr + offset, len); | |
1503 | if (r) | |
195aefde | 1504 | return -EFAULT; |
195aefde IE |
1505 | return 0; |
1506 | } | |
1507 | EXPORT_SYMBOL_GPL(kvm_read_guest_page); | |
1508 | ||
1509 | int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len) | |
1510 | { | |
1511 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1512 | int seg; | |
1513 | int offset = offset_in_page(gpa); | |
1514 | int ret; | |
1515 | ||
1516 | while ((seg = next_segment(len, offset)) != 0) { | |
1517 | ret = kvm_read_guest_page(kvm, gfn, data, offset, seg); | |
1518 | if (ret < 0) | |
1519 | return ret; | |
1520 | offset = 0; | |
1521 | len -= seg; | |
1522 | data += seg; | |
1523 | ++gfn; | |
1524 | } | |
1525 | return 0; | |
1526 | } | |
1527 | EXPORT_SYMBOL_GPL(kvm_read_guest); | |
1528 | ||
7ec54588 MT |
1529 | int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, |
1530 | unsigned long len) | |
1531 | { | |
1532 | int r; | |
1533 | unsigned long addr; | |
1534 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1535 | int offset = offset_in_page(gpa); | |
1536 | ||
1537 | addr = gfn_to_hva(kvm, gfn); | |
1538 | if (kvm_is_error_hva(addr)) | |
1539 | return -EFAULT; | |
0aac03f0 | 1540 | pagefault_disable(); |
7ec54588 | 1541 | r = __copy_from_user_inatomic(data, (void __user *)addr + offset, len); |
0aac03f0 | 1542 | pagefault_enable(); |
7ec54588 MT |
1543 | if (r) |
1544 | return -EFAULT; | |
1545 | return 0; | |
1546 | } | |
1547 | EXPORT_SYMBOL(kvm_read_guest_atomic); | |
1548 | ||
195aefde IE |
1549 | int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, |
1550 | int offset, int len) | |
1551 | { | |
e0506bcb IE |
1552 | int r; |
1553 | unsigned long addr; | |
195aefde | 1554 | |
e0506bcb IE |
1555 | addr = gfn_to_hva(kvm, gfn); |
1556 | if (kvm_is_error_hva(addr)) | |
1557 | return -EFAULT; | |
1558 | r = copy_to_user((void __user *)addr + offset, data, len); | |
1559 | if (r) | |
195aefde | 1560 | return -EFAULT; |
195aefde IE |
1561 | mark_page_dirty(kvm, gfn); |
1562 | return 0; | |
1563 | } | |
1564 | EXPORT_SYMBOL_GPL(kvm_write_guest_page); | |
1565 | ||
1566 | int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, | |
1567 | unsigned long len) | |
1568 | { | |
1569 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1570 | int seg; | |
1571 | int offset = offset_in_page(gpa); | |
1572 | int ret; | |
1573 | ||
1574 | while ((seg = next_segment(len, offset)) != 0) { | |
1575 | ret = kvm_write_guest_page(kvm, gfn, data, offset, seg); | |
1576 | if (ret < 0) | |
1577 | return ret; | |
1578 | offset = 0; | |
1579 | len -= seg; | |
1580 | data += seg; | |
1581 | ++gfn; | |
1582 | } | |
1583 | return 0; | |
1584 | } | |
1585 | ||
1586 | int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len) | |
1587 | { | |
3e021bf5 | 1588 | return kvm_write_guest_page(kvm, gfn, empty_zero_page, offset, len); |
195aefde IE |
1589 | } |
1590 | EXPORT_SYMBOL_GPL(kvm_clear_guest_page); | |
1591 | ||
1592 | int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len) | |
1593 | { | |
1594 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1595 | int seg; | |
1596 | int offset = offset_in_page(gpa); | |
1597 | int ret; | |
1598 | ||
1599 | while ((seg = next_segment(len, offset)) != 0) { | |
1600 | ret = kvm_clear_guest_page(kvm, gfn, offset, seg); | |
1601 | if (ret < 0) | |
1602 | return ret; | |
1603 | offset = 0; | |
1604 | len -= seg; | |
1605 | ++gfn; | |
1606 | } | |
1607 | return 0; | |
1608 | } | |
1609 | EXPORT_SYMBOL_GPL(kvm_clear_guest); | |
1610 | ||
6aa8b732 AK |
1611 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
1612 | { | |
31389947 | 1613 | struct kvm_memory_slot *memslot; |
6aa8b732 | 1614 | |
3b6fff19 | 1615 | gfn = unalias_gfn(kvm, gfn); |
2843099f | 1616 | memslot = gfn_to_memslot_unaliased(kvm, gfn); |
7e9d619d RR |
1617 | if (memslot && memslot->dirty_bitmap) { |
1618 | unsigned long rel_gfn = gfn - memslot->base_gfn; | |
6aa8b732 | 1619 | |
7e9d619d RR |
1620 | /* avoid RMW */ |
1621 | if (!test_bit(rel_gfn, memslot->dirty_bitmap)) | |
1622 | set_bit(rel_gfn, memslot->dirty_bitmap); | |
6aa8b732 AK |
1623 | } |
1624 | } | |
1625 | ||
b6958ce4 ED |
1626 | /* |
1627 | * The vCPU has executed a HLT instruction with in-kernel mode enabled. | |
1628 | */ | |
8776e519 | 1629 | void kvm_vcpu_block(struct kvm_vcpu *vcpu) |
d3bef15f | 1630 | { |
e5c239cf MT |
1631 | DEFINE_WAIT(wait); |
1632 | ||
1633 | for (;;) { | |
1634 | prepare_to_wait(&vcpu->wq, &wait, TASK_INTERRUPTIBLE); | |
1635 | ||
78646121 GN |
1636 | if ((kvm_arch_interrupt_allowed(vcpu) && |
1637 | kvm_cpu_has_interrupt(vcpu)) || | |
09cec754 | 1638 | kvm_arch_vcpu_runnable(vcpu)) { |
d7690175 | 1639 | set_bit(KVM_REQ_UNHALT, &vcpu->requests); |
e5c239cf | 1640 | break; |
d7690175 | 1641 | } |
09cec754 GN |
1642 | if (kvm_cpu_has_pending_timer(vcpu)) |
1643 | break; | |
e5c239cf MT |
1644 | if (signal_pending(current)) |
1645 | break; | |
1646 | ||
b6958ce4 ED |
1647 | vcpu_put(vcpu); |
1648 | schedule(); | |
1649 | vcpu_load(vcpu); | |
1650 | } | |
d3bef15f | 1651 | |
e5c239cf | 1652 | finish_wait(&vcpu->wq, &wait); |
b6958ce4 ED |
1653 | } |
1654 | ||
6aa8b732 AK |
1655 | void kvm_resched(struct kvm_vcpu *vcpu) |
1656 | { | |
3fca0365 YD |
1657 | if (!need_resched()) |
1658 | return; | |
6aa8b732 | 1659 | cond_resched(); |
6aa8b732 AK |
1660 | } |
1661 | EXPORT_SYMBOL_GPL(kvm_resched); | |
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 |
e4a533a4 | 1679 | return VM_FAULT_SIGBUS; |
9a2bb7f4 | 1680 | get_page(page); |
e4a533a4 | 1681 | vmf->page = page; |
1682 | return 0; | |
9a2bb7f4 AK |
1683 | } |
1684 | ||
1685 | static 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, | |
1706 | .compat_ioctl = kvm_vcpu_ioctl, | |
9a2bb7f4 | 1707 | .mmap = kvm_vcpu_mmap, |
bccf2150 AK |
1708 | }; |
1709 | ||
1710 | /* | |
1711 | * Allocates an inode for the vcpu. | |
1712 | */ | |
1713 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) | |
1714 | { | |
7d9dbca3 | 1715 | int fd = anon_inode_getfd("kvm-vcpu", &kvm_vcpu_fops, vcpu, 0); |
2030a42c | 1716 | if (fd < 0) |
66c0b394 | 1717 | kvm_put_kvm(vcpu->kvm); |
bccf2150 | 1718 | return fd; |
bccf2150 AK |
1719 | } |
1720 | ||
c5ea7660 AK |
1721 | /* |
1722 | * Creates some virtual cpus. Good luck creating more than one. | |
1723 | */ | |
1724 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n) | |
1725 | { | |
1726 | int r; | |
1727 | struct kvm_vcpu *vcpu; | |
1728 | ||
c5ea7660 | 1729 | if (!valid_vcpu(n)) |
fb3f0f51 | 1730 | return -EINVAL; |
c5ea7660 | 1731 | |
e9b11c17 | 1732 | vcpu = kvm_arch_vcpu_create(kvm, n); |
fb3f0f51 RR |
1733 | if (IS_ERR(vcpu)) |
1734 | return PTR_ERR(vcpu); | |
c5ea7660 | 1735 | |
15ad7146 AK |
1736 | preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops); |
1737 | ||
26e5215f AK |
1738 | r = kvm_arch_vcpu_setup(vcpu); |
1739 | if (r) | |
7d8fece6 | 1740 | return r; |
26e5215f | 1741 | |
11ec2804 | 1742 | mutex_lock(&kvm->lock); |
fb3f0f51 RR |
1743 | if (kvm->vcpus[n]) { |
1744 | r = -EEXIST; | |
e9b11c17 | 1745 | goto vcpu_destroy; |
fb3f0f51 RR |
1746 | } |
1747 | kvm->vcpus[n] = vcpu; | |
11ec2804 | 1748 | mutex_unlock(&kvm->lock); |
c5ea7660 | 1749 | |
fb3f0f51 | 1750 | /* Now it's all set up, let userspace reach it */ |
66c0b394 | 1751 | kvm_get_kvm(kvm); |
bccf2150 AK |
1752 | r = create_vcpu_fd(vcpu); |
1753 | if (r < 0) | |
fb3f0f51 RR |
1754 | goto unlink; |
1755 | return r; | |
39c3b86e | 1756 | |
fb3f0f51 | 1757 | unlink: |
11ec2804 | 1758 | mutex_lock(&kvm->lock); |
fb3f0f51 | 1759 | kvm->vcpus[n] = NULL; |
e9b11c17 | 1760 | vcpu_destroy: |
7d8fece6 | 1761 | mutex_unlock(&kvm->lock); |
d40ccc62 | 1762 | kvm_arch_vcpu_destroy(vcpu); |
c5ea7660 AK |
1763 | return r; |
1764 | } | |
1765 | ||
1961d276 AK |
1766 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
1767 | { | |
1768 | if (sigset) { | |
1769 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1770 | vcpu->sigset_active = 1; | |
1771 | vcpu->sigset = *sigset; | |
1772 | } else | |
1773 | vcpu->sigset_active = 0; | |
1774 | return 0; | |
1775 | } | |
1776 | ||
c1e01514 SY |
1777 | #ifdef __KVM_HAVE_MSIX |
1778 | static int kvm_vm_ioctl_set_msix_nr(struct kvm *kvm, | |
1779 | struct kvm_assigned_msix_nr *entry_nr) | |
1780 | { | |
1781 | int r = 0; | |
1782 | struct kvm_assigned_dev_kernel *adev; | |
1783 | ||
1784 | mutex_lock(&kvm->lock); | |
1785 | ||
1786 | adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
1787 | entry_nr->assigned_dev_id); | |
1788 | if (!adev) { | |
1789 | r = -EINVAL; | |
1790 | goto msix_nr_out; | |
1791 | } | |
1792 | ||
1793 | if (adev->entries_nr == 0) { | |
1794 | adev->entries_nr = entry_nr->entry_nr; | |
1795 | if (adev->entries_nr == 0 || | |
1796 | adev->entries_nr >= KVM_MAX_MSIX_PER_DEV) { | |
1797 | r = -EINVAL; | |
1798 | goto msix_nr_out; | |
1799 | } | |
1800 | ||
1801 | adev->host_msix_entries = kzalloc(sizeof(struct msix_entry) * | |
1802 | entry_nr->entry_nr, | |
1803 | GFP_KERNEL); | |
1804 | if (!adev->host_msix_entries) { | |
1805 | r = -ENOMEM; | |
1806 | goto msix_nr_out; | |
1807 | } | |
1808 | adev->guest_msix_entries = kzalloc( | |
1809 | sizeof(struct kvm_guest_msix_entry) * | |
1810 | entry_nr->entry_nr, GFP_KERNEL); | |
1811 | if (!adev->guest_msix_entries) { | |
1812 | kfree(adev->host_msix_entries); | |
1813 | r = -ENOMEM; | |
1814 | goto msix_nr_out; | |
1815 | } | |
1816 | } else /* Not allowed set MSI-X number twice */ | |
1817 | r = -EINVAL; | |
1818 | msix_nr_out: | |
1819 | mutex_unlock(&kvm->lock); | |
1820 | return r; | |
1821 | } | |
1822 | ||
1823 | static int kvm_vm_ioctl_set_msix_entry(struct kvm *kvm, | |
1824 | struct kvm_assigned_msix_entry *entry) | |
1825 | { | |
1826 | int r = 0, i; | |
1827 | struct kvm_assigned_dev_kernel *adev; | |
1828 | ||
1829 | mutex_lock(&kvm->lock); | |
1830 | ||
1831 | adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
1832 | entry->assigned_dev_id); | |
1833 | ||
1834 | if (!adev) { | |
1835 | r = -EINVAL; | |
1836 | goto msix_entry_out; | |
1837 | } | |
1838 | ||
1839 | for (i = 0; i < adev->entries_nr; i++) | |
1840 | if (adev->guest_msix_entries[i].vector == 0 || | |
1841 | adev->guest_msix_entries[i].entry == entry->entry) { | |
1842 | adev->guest_msix_entries[i].entry = entry->entry; | |
1843 | adev->guest_msix_entries[i].vector = entry->gsi; | |
1844 | adev->host_msix_entries[i].entry = entry->entry; | |
1845 | break; | |
1846 | } | |
1847 | if (i == adev->entries_nr) { | |
1848 | r = -ENOSPC; | |
1849 | goto msix_entry_out; | |
1850 | } | |
1851 | ||
1852 | msix_entry_out: | |
1853 | mutex_unlock(&kvm->lock); | |
1854 | ||
1855 | return r; | |
1856 | } | |
1857 | #endif | |
1858 | ||
bccf2150 AK |
1859 | static long kvm_vcpu_ioctl(struct file *filp, |
1860 | unsigned int ioctl, unsigned long arg) | |
6aa8b732 | 1861 | { |
bccf2150 | 1862 | struct kvm_vcpu *vcpu = filp->private_data; |
2f366987 | 1863 | void __user *argp = (void __user *)arg; |
313a3dc7 | 1864 | int r; |
fa3795a7 DH |
1865 | struct kvm_fpu *fpu = NULL; |
1866 | struct kvm_sregs *kvm_sregs = NULL; | |
6aa8b732 | 1867 | |
6d4e4c4f AK |
1868 | if (vcpu->kvm->mm != current->mm) |
1869 | return -EIO; | |
6aa8b732 | 1870 | switch (ioctl) { |
9a2bb7f4 | 1871 | case KVM_RUN: |
f0fe5108 AK |
1872 | r = -EINVAL; |
1873 | if (arg) | |
1874 | goto out; | |
b6c7a5dc | 1875 | r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run); |
6aa8b732 | 1876 | break; |
6aa8b732 | 1877 | case KVM_GET_REGS: { |
3e4bb3ac | 1878 | struct kvm_regs *kvm_regs; |
6aa8b732 | 1879 | |
3e4bb3ac XZ |
1880 | r = -ENOMEM; |
1881 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); | |
1882 | if (!kvm_regs) | |
6aa8b732 | 1883 | goto out; |
3e4bb3ac XZ |
1884 | r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs); |
1885 | if (r) | |
1886 | goto out_free1; | |
6aa8b732 | 1887 | r = -EFAULT; |
3e4bb3ac XZ |
1888 | if (copy_to_user(argp, kvm_regs, sizeof(struct kvm_regs))) |
1889 | goto out_free1; | |
6aa8b732 | 1890 | r = 0; |
3e4bb3ac XZ |
1891 | out_free1: |
1892 | kfree(kvm_regs); | |
6aa8b732 AK |
1893 | break; |
1894 | } | |
1895 | case KVM_SET_REGS: { | |
3e4bb3ac | 1896 | struct kvm_regs *kvm_regs; |
6aa8b732 | 1897 | |
3e4bb3ac XZ |
1898 | r = -ENOMEM; |
1899 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); | |
1900 | if (!kvm_regs) | |
6aa8b732 | 1901 | goto out; |
3e4bb3ac XZ |
1902 | r = -EFAULT; |
1903 | if (copy_from_user(kvm_regs, argp, sizeof(struct kvm_regs))) | |
1904 | goto out_free2; | |
1905 | r = kvm_arch_vcpu_ioctl_set_regs(vcpu, kvm_regs); | |
6aa8b732 | 1906 | if (r) |
3e4bb3ac | 1907 | goto out_free2; |
6aa8b732 | 1908 | r = 0; |
3e4bb3ac XZ |
1909 | out_free2: |
1910 | kfree(kvm_regs); | |
6aa8b732 AK |
1911 | break; |
1912 | } | |
1913 | case KVM_GET_SREGS: { | |
fa3795a7 DH |
1914 | kvm_sregs = kzalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
1915 | r = -ENOMEM; | |
1916 | if (!kvm_sregs) | |
1917 | goto out; | |
1918 | r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs); | |
6aa8b732 AK |
1919 | if (r) |
1920 | goto out; | |
1921 | r = -EFAULT; | |
fa3795a7 | 1922 | if (copy_to_user(argp, kvm_sregs, sizeof(struct kvm_sregs))) |
6aa8b732 AK |
1923 | goto out; |
1924 | r = 0; | |
1925 | break; | |
1926 | } | |
1927 | case KVM_SET_SREGS: { | |
fa3795a7 DH |
1928 | kvm_sregs = kmalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
1929 | r = -ENOMEM; | |
1930 | if (!kvm_sregs) | |
1931 | goto out; | |
6aa8b732 | 1932 | r = -EFAULT; |
fa3795a7 | 1933 | if (copy_from_user(kvm_sregs, argp, sizeof(struct kvm_sregs))) |
6aa8b732 | 1934 | goto out; |
fa3795a7 | 1935 | r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs); |
6aa8b732 AK |
1936 | if (r) |
1937 | goto out; | |
1938 | r = 0; | |
1939 | break; | |
1940 | } | |
62d9f0db MT |
1941 | case KVM_GET_MP_STATE: { |
1942 | struct kvm_mp_state mp_state; | |
1943 | ||
1944 | r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state); | |
1945 | if (r) | |
1946 | goto out; | |
1947 | r = -EFAULT; | |
1948 | if (copy_to_user(argp, &mp_state, sizeof mp_state)) | |
1949 | goto out; | |
1950 | r = 0; | |
1951 | break; | |
1952 | } | |
1953 | case KVM_SET_MP_STATE: { | |
1954 | struct kvm_mp_state mp_state; | |
1955 | ||
1956 | r = -EFAULT; | |
1957 | if (copy_from_user(&mp_state, argp, sizeof mp_state)) | |
1958 | goto out; | |
1959 | r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state); | |
1960 | if (r) | |
1961 | goto out; | |
1962 | r = 0; | |
1963 | break; | |
1964 | } | |
6aa8b732 AK |
1965 | case KVM_TRANSLATE: { |
1966 | struct kvm_translation tr; | |
1967 | ||
1968 | r = -EFAULT; | |
2f366987 | 1969 | if (copy_from_user(&tr, argp, sizeof tr)) |
6aa8b732 | 1970 | goto out; |
8b006791 | 1971 | r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr); |
6aa8b732 AK |
1972 | if (r) |
1973 | goto out; | |
1974 | r = -EFAULT; | |
2f366987 | 1975 | if (copy_to_user(argp, &tr, sizeof tr)) |
6aa8b732 AK |
1976 | goto out; |
1977 | r = 0; | |
1978 | break; | |
1979 | } | |
d0bfb940 JK |
1980 | case KVM_SET_GUEST_DEBUG: { |
1981 | struct kvm_guest_debug dbg; | |
6aa8b732 AK |
1982 | |
1983 | r = -EFAULT; | |
2f366987 | 1984 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
6aa8b732 | 1985 | goto out; |
d0bfb940 | 1986 | r = kvm_arch_vcpu_ioctl_set_guest_debug(vcpu, &dbg); |
6aa8b732 AK |
1987 | if (r) |
1988 | goto out; | |
1989 | r = 0; | |
1990 | break; | |
1991 | } | |
1961d276 AK |
1992 | case KVM_SET_SIGNAL_MASK: { |
1993 | struct kvm_signal_mask __user *sigmask_arg = argp; | |
1994 | struct kvm_signal_mask kvm_sigmask; | |
1995 | sigset_t sigset, *p; | |
1996 | ||
1997 | p = NULL; | |
1998 | if (argp) { | |
1999 | r = -EFAULT; | |
2000 | if (copy_from_user(&kvm_sigmask, argp, | |
2001 | sizeof kvm_sigmask)) | |
2002 | goto out; | |
2003 | r = -EINVAL; | |
2004 | if (kvm_sigmask.len != sizeof sigset) | |
2005 | goto out; | |
2006 | r = -EFAULT; | |
2007 | if (copy_from_user(&sigset, sigmask_arg->sigset, | |
2008 | sizeof sigset)) | |
2009 | goto out; | |
2010 | p = &sigset; | |
2011 | } | |
2012 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); | |
2013 | break; | |
2014 | } | |
b8836737 | 2015 | case KVM_GET_FPU: { |
fa3795a7 DH |
2016 | fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
2017 | r = -ENOMEM; | |
2018 | if (!fpu) | |
2019 | goto out; | |
2020 | r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, fpu); | |
b8836737 AK |
2021 | if (r) |
2022 | goto out; | |
2023 | r = -EFAULT; | |
fa3795a7 | 2024 | if (copy_to_user(argp, fpu, sizeof(struct kvm_fpu))) |
b8836737 AK |
2025 | goto out; |
2026 | r = 0; | |
2027 | break; | |
2028 | } | |
2029 | case KVM_SET_FPU: { | |
fa3795a7 DH |
2030 | fpu = kmalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
2031 | r = -ENOMEM; | |
2032 | if (!fpu) | |
2033 | goto out; | |
b8836737 | 2034 | r = -EFAULT; |
fa3795a7 | 2035 | if (copy_from_user(fpu, argp, sizeof(struct kvm_fpu))) |
b8836737 | 2036 | goto out; |
fa3795a7 | 2037 | r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu); |
b8836737 AK |
2038 | if (r) |
2039 | goto out; | |
2040 | r = 0; | |
2041 | break; | |
2042 | } | |
bccf2150 | 2043 | default: |
313a3dc7 | 2044 | r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
bccf2150 AK |
2045 | } |
2046 | out: | |
fa3795a7 DH |
2047 | kfree(fpu); |
2048 | kfree(kvm_sregs); | |
bccf2150 AK |
2049 | return r; |
2050 | } | |
2051 | ||
2052 | static long kvm_vm_ioctl(struct file *filp, | |
2053 | unsigned int ioctl, unsigned long arg) | |
2054 | { | |
2055 | struct kvm *kvm = filp->private_data; | |
2056 | void __user *argp = (void __user *)arg; | |
1fe779f8 | 2057 | int r; |
bccf2150 | 2058 | |
6d4e4c4f AK |
2059 | if (kvm->mm != current->mm) |
2060 | return -EIO; | |
bccf2150 AK |
2061 | switch (ioctl) { |
2062 | case KVM_CREATE_VCPU: | |
2063 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); | |
2064 | if (r < 0) | |
2065 | goto out; | |
2066 | break; | |
6fc138d2 IE |
2067 | case KVM_SET_USER_MEMORY_REGION: { |
2068 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
2069 | ||
2070 | r = -EFAULT; | |
2071 | if (copy_from_user(&kvm_userspace_mem, argp, | |
2072 | sizeof kvm_userspace_mem)) | |
2073 | goto out; | |
2074 | ||
2075 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1); | |
6aa8b732 AK |
2076 | if (r) |
2077 | goto out; | |
2078 | break; | |
2079 | } | |
2080 | case KVM_GET_DIRTY_LOG: { | |
2081 | struct kvm_dirty_log log; | |
2082 | ||
2083 | r = -EFAULT; | |
2f366987 | 2084 | if (copy_from_user(&log, argp, sizeof log)) |
6aa8b732 | 2085 | goto out; |
2c6f5df9 | 2086 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
6aa8b732 AK |
2087 | if (r) |
2088 | goto out; | |
2089 | break; | |
2090 | } | |
5f94c174 LV |
2091 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
2092 | case KVM_REGISTER_COALESCED_MMIO: { | |
2093 | struct kvm_coalesced_mmio_zone zone; | |
2094 | r = -EFAULT; | |
2095 | if (copy_from_user(&zone, argp, sizeof zone)) | |
2096 | goto out; | |
2097 | r = -ENXIO; | |
2098 | r = kvm_vm_ioctl_register_coalesced_mmio(kvm, &zone); | |
2099 | if (r) | |
2100 | goto out; | |
2101 | r = 0; | |
2102 | break; | |
2103 | } | |
2104 | case KVM_UNREGISTER_COALESCED_MMIO: { | |
2105 | struct kvm_coalesced_mmio_zone zone; | |
2106 | r = -EFAULT; | |
2107 | if (copy_from_user(&zone, argp, sizeof zone)) | |
2108 | goto out; | |
2109 | r = -ENXIO; | |
2110 | r = kvm_vm_ioctl_unregister_coalesced_mmio(kvm, &zone); | |
2111 | if (r) | |
2112 | goto out; | |
2113 | r = 0; | |
2114 | break; | |
2115 | } | |
8a98f664 XZ |
2116 | #endif |
2117 | #ifdef KVM_CAP_DEVICE_ASSIGNMENT | |
2118 | case KVM_ASSIGN_PCI_DEVICE: { | |
2119 | struct kvm_assigned_pci_dev assigned_dev; | |
2120 | ||
2121 | r = -EFAULT; | |
2122 | if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev)) | |
2123 | goto out; | |
2124 | r = kvm_vm_ioctl_assign_device(kvm, &assigned_dev); | |
2125 | if (r) | |
2126 | goto out; | |
2127 | break; | |
2128 | } | |
2129 | case KVM_ASSIGN_IRQ: { | |
e56d532f SY |
2130 | r = -EOPNOTSUPP; |
2131 | break; | |
2132 | } | |
2133 | #ifdef KVM_CAP_ASSIGN_DEV_IRQ | |
2134 | case KVM_ASSIGN_DEV_IRQ: { | |
8a98f664 XZ |
2135 | struct kvm_assigned_irq assigned_irq; |
2136 | ||
2137 | r = -EFAULT; | |
2138 | if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq)) | |
2139 | goto out; | |
2140 | r = kvm_vm_ioctl_assign_irq(kvm, &assigned_irq); | |
2141 | if (r) | |
2142 | goto out; | |
2143 | break; | |
2144 | } | |
e56d532f SY |
2145 | case KVM_DEASSIGN_DEV_IRQ: { |
2146 | struct kvm_assigned_irq assigned_irq; | |
2147 | ||
2148 | r = -EFAULT; | |
2149 | if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq)) | |
2150 | goto out; | |
2151 | r = kvm_vm_ioctl_deassign_dev_irq(kvm, &assigned_irq); | |
2152 | if (r) | |
2153 | goto out; | |
2154 | break; | |
2155 | } | |
2156 | #endif | |
0a920356 WH |
2157 | #endif |
2158 | #ifdef KVM_CAP_DEVICE_DEASSIGNMENT | |
2159 | case KVM_DEASSIGN_PCI_DEVICE: { | |
2160 | struct kvm_assigned_pci_dev assigned_dev; | |
2161 | ||
2162 | r = -EFAULT; | |
2163 | if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev)) | |
2164 | goto out; | |
2165 | r = kvm_vm_ioctl_deassign_device(kvm, &assigned_dev); | |
2166 | if (r) | |
2167 | goto out; | |
2168 | break; | |
2169 | } | |
399ec807 AK |
2170 | #endif |
2171 | #ifdef KVM_CAP_IRQ_ROUTING | |
2172 | case KVM_SET_GSI_ROUTING: { | |
2173 | struct kvm_irq_routing routing; | |
2174 | struct kvm_irq_routing __user *urouting; | |
2175 | struct kvm_irq_routing_entry *entries; | |
2176 | ||
2177 | r = -EFAULT; | |
2178 | if (copy_from_user(&routing, argp, sizeof(routing))) | |
2179 | goto out; | |
2180 | r = -EINVAL; | |
2181 | if (routing.nr >= KVM_MAX_IRQ_ROUTES) | |
2182 | goto out; | |
2183 | if (routing.flags) | |
2184 | goto out; | |
2185 | r = -ENOMEM; | |
2186 | entries = vmalloc(routing.nr * sizeof(*entries)); | |
2187 | if (!entries) | |
2188 | goto out; | |
2189 | r = -EFAULT; | |
2190 | urouting = argp; | |
2191 | if (copy_from_user(entries, urouting->entries, | |
2192 | routing.nr * sizeof(*entries))) | |
2193 | goto out_free_irq_routing; | |
2194 | r = kvm_set_irq_routing(kvm, entries, routing.nr, | |
2195 | routing.flags); | |
2196 | out_free_irq_routing: | |
2197 | vfree(entries); | |
2198 | break; | |
2199 | } | |
c1e01514 SY |
2200 | #ifdef __KVM_HAVE_MSIX |
2201 | case KVM_ASSIGN_SET_MSIX_NR: { | |
2202 | struct kvm_assigned_msix_nr entry_nr; | |
2203 | r = -EFAULT; | |
2204 | if (copy_from_user(&entry_nr, argp, sizeof entry_nr)) | |
2205 | goto out; | |
2206 | r = kvm_vm_ioctl_set_msix_nr(kvm, &entry_nr); | |
2207 | if (r) | |
2208 | goto out; | |
2209 | break; | |
2210 | } | |
2211 | case KVM_ASSIGN_SET_MSIX_ENTRY: { | |
2212 | struct kvm_assigned_msix_entry entry; | |
2213 | r = -EFAULT; | |
2214 | if (copy_from_user(&entry, argp, sizeof entry)) | |
2215 | goto out; | |
2216 | r = kvm_vm_ioctl_set_msix_entry(kvm, &entry); | |
2217 | if (r) | |
2218 | goto out; | |
2219 | break; | |
2220 | } | |
5f94c174 | 2221 | #endif |
c1e01514 | 2222 | #endif /* KVM_CAP_IRQ_ROUTING */ |
721eecbf GH |
2223 | case KVM_IRQFD: { |
2224 | struct kvm_irqfd data; | |
2225 | ||
2226 | r = -EFAULT; | |
2227 | if (copy_from_user(&data, argp, sizeof data)) | |
2228 | goto out; | |
2229 | r = kvm_irqfd(kvm, data.fd, data.gsi, data.flags); | |
2230 | break; | |
2231 | } | |
f17abe9a | 2232 | default: |
1fe779f8 | 2233 | r = kvm_arch_vm_ioctl(filp, ioctl, arg); |
f17abe9a AK |
2234 | } |
2235 | out: | |
2236 | return r; | |
2237 | } | |
2238 | ||
e4a533a4 | 2239 | static int kvm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
f17abe9a | 2240 | { |
777b3f49 MT |
2241 | struct page *page[1]; |
2242 | unsigned long addr; | |
2243 | int npages; | |
2244 | gfn_t gfn = vmf->pgoff; | |
f17abe9a | 2245 | struct kvm *kvm = vma->vm_file->private_data; |
f17abe9a | 2246 | |
777b3f49 MT |
2247 | addr = gfn_to_hva(kvm, gfn); |
2248 | if (kvm_is_error_hva(addr)) | |
e4a533a4 | 2249 | return VM_FAULT_SIGBUS; |
777b3f49 MT |
2250 | |
2251 | npages = get_user_pages(current, current->mm, addr, 1, 1, 0, page, | |
2252 | NULL); | |
2253 | if (unlikely(npages != 1)) | |
e4a533a4 | 2254 | return VM_FAULT_SIGBUS; |
777b3f49 MT |
2255 | |
2256 | vmf->page = page[0]; | |
e4a533a4 | 2257 | return 0; |
f17abe9a AK |
2258 | } |
2259 | ||
2260 | static struct vm_operations_struct kvm_vm_vm_ops = { | |
e4a533a4 | 2261 | .fault = kvm_vm_fault, |
f17abe9a AK |
2262 | }; |
2263 | ||
2264 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) | |
2265 | { | |
2266 | vma->vm_ops = &kvm_vm_vm_ops; | |
2267 | return 0; | |
2268 | } | |
2269 | ||
3d3aab1b | 2270 | static struct file_operations kvm_vm_fops = { |
f17abe9a AK |
2271 | .release = kvm_vm_release, |
2272 | .unlocked_ioctl = kvm_vm_ioctl, | |
2273 | .compat_ioctl = kvm_vm_ioctl, | |
2274 | .mmap = kvm_vm_mmap, | |
2275 | }; | |
2276 | ||
2277 | static int kvm_dev_ioctl_create_vm(void) | |
2278 | { | |
2030a42c | 2279 | int fd; |
f17abe9a AK |
2280 | struct kvm *kvm; |
2281 | ||
f17abe9a | 2282 | kvm = kvm_create_vm(); |
d6d28168 AK |
2283 | if (IS_ERR(kvm)) |
2284 | return PTR_ERR(kvm); | |
7d9dbca3 | 2285 | fd = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, 0); |
2030a42c | 2286 | if (fd < 0) |
66c0b394 | 2287 | kvm_put_kvm(kvm); |
f17abe9a | 2288 | |
f17abe9a | 2289 | return fd; |
f17abe9a AK |
2290 | } |
2291 | ||
1a811b61 AK |
2292 | static long kvm_dev_ioctl_check_extension_generic(long arg) |
2293 | { | |
2294 | switch (arg) { | |
ca9edaee | 2295 | case KVM_CAP_USER_MEMORY: |
1a811b61 | 2296 | case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: |
4cd481f6 | 2297 | case KVM_CAP_JOIN_MEMORY_REGIONS_WORKS: |
1a811b61 | 2298 | return 1; |
399ec807 AK |
2299 | #ifdef CONFIG_HAVE_KVM_IRQCHIP |
2300 | case KVM_CAP_IRQ_ROUTING: | |
36463146 | 2301 | return KVM_MAX_IRQ_ROUTES; |
399ec807 | 2302 | #endif |
1a811b61 AK |
2303 | default: |
2304 | break; | |
2305 | } | |
2306 | return kvm_dev_ioctl_check_extension(arg); | |
2307 | } | |
2308 | ||
f17abe9a AK |
2309 | static long kvm_dev_ioctl(struct file *filp, |
2310 | unsigned int ioctl, unsigned long arg) | |
2311 | { | |
07c45a36 | 2312 | long r = -EINVAL; |
f17abe9a AK |
2313 | |
2314 | switch (ioctl) { | |
2315 | case KVM_GET_API_VERSION: | |
f0fe5108 AK |
2316 | r = -EINVAL; |
2317 | if (arg) | |
2318 | goto out; | |
f17abe9a AK |
2319 | r = KVM_API_VERSION; |
2320 | break; | |
2321 | case KVM_CREATE_VM: | |
f0fe5108 AK |
2322 | r = -EINVAL; |
2323 | if (arg) | |
2324 | goto out; | |
f17abe9a AK |
2325 | r = kvm_dev_ioctl_create_vm(); |
2326 | break; | |
018d00d2 | 2327 | case KVM_CHECK_EXTENSION: |
1a811b61 | 2328 | r = kvm_dev_ioctl_check_extension_generic(arg); |
5d308f45 | 2329 | break; |
07c45a36 AK |
2330 | case KVM_GET_VCPU_MMAP_SIZE: |
2331 | r = -EINVAL; | |
2332 | if (arg) | |
2333 | goto out; | |
adb1ff46 AK |
2334 | r = PAGE_SIZE; /* struct kvm_run */ |
2335 | #ifdef CONFIG_X86 | |
2336 | r += PAGE_SIZE; /* pio data page */ | |
5f94c174 LV |
2337 | #endif |
2338 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
2339 | r += PAGE_SIZE; /* coalesced mmio ring page */ | |
adb1ff46 | 2340 | #endif |
07c45a36 | 2341 | break; |
d4c9ff2d FEL |
2342 | case KVM_TRACE_ENABLE: |
2343 | case KVM_TRACE_PAUSE: | |
2344 | case KVM_TRACE_DISABLE: | |
2345 | r = kvm_trace_ioctl(ioctl, arg); | |
2346 | break; | |
6aa8b732 | 2347 | default: |
043405e1 | 2348 | return kvm_arch_dev_ioctl(filp, ioctl, arg); |
6aa8b732 AK |
2349 | } |
2350 | out: | |
2351 | return r; | |
2352 | } | |
2353 | ||
6aa8b732 | 2354 | static struct file_operations kvm_chardev_ops = { |
6aa8b732 AK |
2355 | .unlocked_ioctl = kvm_dev_ioctl, |
2356 | .compat_ioctl = kvm_dev_ioctl, | |
6aa8b732 AK |
2357 | }; |
2358 | ||
2359 | static struct miscdevice kvm_dev = { | |
bbe4432e | 2360 | KVM_MINOR, |
6aa8b732 AK |
2361 | "kvm", |
2362 | &kvm_chardev_ops, | |
2363 | }; | |
2364 | ||
1b6c0168 AK |
2365 | static void hardware_enable(void *junk) |
2366 | { | |
2367 | int cpu = raw_smp_processor_id(); | |
2368 | ||
7f59f492 | 2369 | if (cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
1b6c0168 | 2370 | return; |
7f59f492 | 2371 | cpumask_set_cpu(cpu, cpus_hardware_enabled); |
e9b11c17 | 2372 | kvm_arch_hardware_enable(NULL); |
1b6c0168 AK |
2373 | } |
2374 | ||
2375 | static void hardware_disable(void *junk) | |
2376 | { | |
2377 | int cpu = raw_smp_processor_id(); | |
2378 | ||
7f59f492 | 2379 | if (!cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
1b6c0168 | 2380 | return; |
7f59f492 | 2381 | cpumask_clear_cpu(cpu, cpus_hardware_enabled); |
e9b11c17 | 2382 | kvm_arch_hardware_disable(NULL); |
1b6c0168 AK |
2383 | } |
2384 | ||
774c47f1 AK |
2385 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, |
2386 | void *v) | |
2387 | { | |
2388 | int cpu = (long)v; | |
2389 | ||
1a6f4d7f | 2390 | val &= ~CPU_TASKS_FROZEN; |
774c47f1 | 2391 | switch (val) { |
cec9ad27 | 2392 | case CPU_DYING: |
6ec8a856 AK |
2393 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
2394 | cpu); | |
2395 | hardware_disable(NULL); | |
2396 | break; | |
774c47f1 | 2397 | case CPU_UP_CANCELED: |
43934a38 JK |
2398 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
2399 | cpu); | |
8691e5a8 | 2400 | smp_call_function_single(cpu, hardware_disable, NULL, 1); |
774c47f1 | 2401 | break; |
43934a38 JK |
2402 | case CPU_ONLINE: |
2403 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", | |
2404 | cpu); | |
8691e5a8 | 2405 | smp_call_function_single(cpu, hardware_enable, NULL, 1); |
774c47f1 AK |
2406 | break; |
2407 | } | |
2408 | return NOTIFY_OK; | |
2409 | } | |
2410 | ||
4ecac3fd AK |
2411 | |
2412 | asmlinkage void kvm_handle_fault_on_reboot(void) | |
2413 | { | |
2414 | if (kvm_rebooting) | |
2415 | /* spin while reset goes on */ | |
2416 | while (true) | |
2417 | ; | |
2418 | /* Fault while not rebooting. We want the trace. */ | |
2419 | BUG(); | |
2420 | } | |
2421 | EXPORT_SYMBOL_GPL(kvm_handle_fault_on_reboot); | |
2422 | ||
9a2b85c6 | 2423 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, |
d77c26fc | 2424 | void *v) |
9a2b85c6 | 2425 | { |
8e1c1815 SY |
2426 | /* |
2427 | * Some (well, at least mine) BIOSes hang on reboot if | |
2428 | * in vmx root mode. | |
2429 | * | |
2430 | * And Intel TXT required VMX off for all cpu when system shutdown. | |
2431 | */ | |
2432 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); | |
2433 | kvm_rebooting = true; | |
2434 | on_each_cpu(hardware_disable, NULL, 1); | |
9a2b85c6 RR |
2435 | return NOTIFY_OK; |
2436 | } | |
2437 | ||
2438 | static struct notifier_block kvm_reboot_notifier = { | |
2439 | .notifier_call = kvm_reboot, | |
2440 | .priority = 0, | |
2441 | }; | |
2442 | ||
2eeb2e94 GH |
2443 | void kvm_io_bus_init(struct kvm_io_bus *bus) |
2444 | { | |
2445 | memset(bus, 0, sizeof(*bus)); | |
2446 | } | |
2447 | ||
2448 | void kvm_io_bus_destroy(struct kvm_io_bus *bus) | |
2449 | { | |
2450 | int i; | |
2451 | ||
2452 | for (i = 0; i < bus->dev_count; i++) { | |
2453 | struct kvm_io_device *pos = bus->devs[i]; | |
2454 | ||
2455 | kvm_iodevice_destructor(pos); | |
2456 | } | |
2457 | } | |
2458 | ||
92760499 LV |
2459 | struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, |
2460 | gpa_t addr, int len, int is_write) | |
2eeb2e94 GH |
2461 | { |
2462 | int i; | |
2463 | ||
2464 | for (i = 0; i < bus->dev_count; i++) { | |
2465 | struct kvm_io_device *pos = bus->devs[i]; | |
2466 | ||
d76685c4 | 2467 | if (kvm_iodevice_in_range(pos, addr, len, is_write)) |
2eeb2e94 GH |
2468 | return pos; |
2469 | } | |
2470 | ||
2471 | return NULL; | |
2472 | } | |
2473 | ||
2474 | void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev) | |
2475 | { | |
2476 | BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1)); | |
2477 | ||
2478 | bus->devs[bus->dev_count++] = dev; | |
2479 | } | |
2480 | ||
774c47f1 AK |
2481 | static struct notifier_block kvm_cpu_notifier = { |
2482 | .notifier_call = kvm_cpu_hotplug, | |
2483 | .priority = 20, /* must be > scheduler priority */ | |
2484 | }; | |
2485 | ||
8b88b099 | 2486 | static int vm_stat_get(void *_offset, u64 *val) |
ba1389b7 AK |
2487 | { |
2488 | unsigned offset = (long)_offset; | |
ba1389b7 AK |
2489 | struct kvm *kvm; |
2490 | ||
8b88b099 | 2491 | *val = 0; |
ba1389b7 AK |
2492 | spin_lock(&kvm_lock); |
2493 | list_for_each_entry(kvm, &vm_list, vm_list) | |
8b88b099 | 2494 | *val += *(u32 *)((void *)kvm + offset); |
ba1389b7 | 2495 | spin_unlock(&kvm_lock); |
8b88b099 | 2496 | return 0; |
ba1389b7 AK |
2497 | } |
2498 | ||
2499 | DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n"); | |
2500 | ||
8b88b099 | 2501 | static int vcpu_stat_get(void *_offset, u64 *val) |
1165f5fe AK |
2502 | { |
2503 | unsigned offset = (long)_offset; | |
1165f5fe AK |
2504 | struct kvm *kvm; |
2505 | struct kvm_vcpu *vcpu; | |
2506 | int i; | |
2507 | ||
8b88b099 | 2508 | *val = 0; |
1165f5fe AK |
2509 | spin_lock(&kvm_lock); |
2510 | list_for_each_entry(kvm, &vm_list, vm_list) | |
2511 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
fb3f0f51 RR |
2512 | vcpu = kvm->vcpus[i]; |
2513 | if (vcpu) | |
8b88b099 | 2514 | *val += *(u32 *)((void *)vcpu + offset); |
1165f5fe AK |
2515 | } |
2516 | spin_unlock(&kvm_lock); | |
8b88b099 | 2517 | return 0; |
1165f5fe AK |
2518 | } |
2519 | ||
ba1389b7 AK |
2520 | DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n"); |
2521 | ||
2522 | static struct file_operations *stat_fops[] = { | |
2523 | [KVM_STAT_VCPU] = &vcpu_stat_fops, | |
2524 | [KVM_STAT_VM] = &vm_stat_fops, | |
2525 | }; | |
1165f5fe | 2526 | |
a16b043c | 2527 | static void kvm_init_debug(void) |
6aa8b732 AK |
2528 | { |
2529 | struct kvm_stats_debugfs_item *p; | |
2530 | ||
76f7c879 | 2531 | kvm_debugfs_dir = debugfs_create_dir("kvm", NULL); |
6aa8b732 | 2532 | for (p = debugfs_entries; p->name; ++p) |
76f7c879 | 2533 | p->dentry = debugfs_create_file(p->name, 0444, kvm_debugfs_dir, |
1165f5fe | 2534 | (void *)(long)p->offset, |
ba1389b7 | 2535 | stat_fops[p->kind]); |
6aa8b732 AK |
2536 | } |
2537 | ||
2538 | static void kvm_exit_debug(void) | |
2539 | { | |
2540 | struct kvm_stats_debugfs_item *p; | |
2541 | ||
2542 | for (p = debugfs_entries; p->name; ++p) | |
2543 | debugfs_remove(p->dentry); | |
76f7c879 | 2544 | debugfs_remove(kvm_debugfs_dir); |
6aa8b732 AK |
2545 | } |
2546 | ||
59ae6c6b AK |
2547 | static int kvm_suspend(struct sys_device *dev, pm_message_t state) |
2548 | { | |
4267c41a | 2549 | hardware_disable(NULL); |
59ae6c6b AK |
2550 | return 0; |
2551 | } | |
2552 | ||
2553 | static int kvm_resume(struct sys_device *dev) | |
2554 | { | |
4267c41a | 2555 | hardware_enable(NULL); |
59ae6c6b AK |
2556 | return 0; |
2557 | } | |
2558 | ||
2559 | static struct sysdev_class kvm_sysdev_class = { | |
af5ca3f4 | 2560 | .name = "kvm", |
59ae6c6b AK |
2561 | .suspend = kvm_suspend, |
2562 | .resume = kvm_resume, | |
2563 | }; | |
2564 | ||
2565 | static struct sys_device kvm_sysdev = { | |
2566 | .id = 0, | |
2567 | .cls = &kvm_sysdev_class, | |
2568 | }; | |
2569 | ||
cea7bb21 | 2570 | struct page *bad_page; |
35149e21 | 2571 | pfn_t bad_pfn; |
6aa8b732 | 2572 | |
15ad7146 AK |
2573 | static inline |
2574 | struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn) | |
2575 | { | |
2576 | return container_of(pn, struct kvm_vcpu, preempt_notifier); | |
2577 | } | |
2578 | ||
2579 | static void kvm_sched_in(struct preempt_notifier *pn, int cpu) | |
2580 | { | |
2581 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
2582 | ||
e9b11c17 | 2583 | kvm_arch_vcpu_load(vcpu, cpu); |
15ad7146 AK |
2584 | } |
2585 | ||
2586 | static void kvm_sched_out(struct preempt_notifier *pn, | |
2587 | struct task_struct *next) | |
2588 | { | |
2589 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
2590 | ||
e9b11c17 | 2591 | kvm_arch_vcpu_put(vcpu); |
15ad7146 AK |
2592 | } |
2593 | ||
f8c16bba | 2594 | int kvm_init(void *opaque, unsigned int vcpu_size, |
c16f862d | 2595 | struct module *module) |
6aa8b732 AK |
2596 | { |
2597 | int r; | |
002c7f7c | 2598 | int cpu; |
6aa8b732 | 2599 | |
cb498ea2 ZX |
2600 | kvm_init_debug(); |
2601 | ||
f8c16bba ZX |
2602 | r = kvm_arch_init(opaque); |
2603 | if (r) | |
d2308784 | 2604 | goto out_fail; |
cb498ea2 ZX |
2605 | |
2606 | bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
2607 | ||
2608 | if (bad_page == NULL) { | |
2609 | r = -ENOMEM; | |
2610 | goto out; | |
2611 | } | |
2612 | ||
35149e21 AL |
2613 | bad_pfn = page_to_pfn(bad_page); |
2614 | ||
8437a617 | 2615 | if (!zalloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) { |
7f59f492 RR |
2616 | r = -ENOMEM; |
2617 | goto out_free_0; | |
2618 | } | |
2619 | ||
e9b11c17 | 2620 | r = kvm_arch_hardware_setup(); |
6aa8b732 | 2621 | if (r < 0) |
7f59f492 | 2622 | goto out_free_0a; |
6aa8b732 | 2623 | |
002c7f7c YS |
2624 | for_each_online_cpu(cpu) { |
2625 | smp_call_function_single(cpu, | |
e9b11c17 | 2626 | kvm_arch_check_processor_compat, |
8691e5a8 | 2627 | &r, 1); |
002c7f7c | 2628 | if (r < 0) |
d2308784 | 2629 | goto out_free_1; |
002c7f7c YS |
2630 | } |
2631 | ||
15c8b6c1 | 2632 | on_each_cpu(hardware_enable, NULL, 1); |
774c47f1 AK |
2633 | r = register_cpu_notifier(&kvm_cpu_notifier); |
2634 | if (r) | |
d2308784 | 2635 | goto out_free_2; |
6aa8b732 AK |
2636 | register_reboot_notifier(&kvm_reboot_notifier); |
2637 | ||
59ae6c6b AK |
2638 | r = sysdev_class_register(&kvm_sysdev_class); |
2639 | if (r) | |
d2308784 | 2640 | goto out_free_3; |
59ae6c6b AK |
2641 | |
2642 | r = sysdev_register(&kvm_sysdev); | |
2643 | if (r) | |
d2308784 | 2644 | goto out_free_4; |
59ae6c6b | 2645 | |
c16f862d RR |
2646 | /* A kmem cache lets us meet the alignment requirements of fx_save. */ |
2647 | kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, | |
56919c5c JP |
2648 | __alignof__(struct kvm_vcpu), |
2649 | 0, NULL); | |
c16f862d RR |
2650 | if (!kvm_vcpu_cache) { |
2651 | r = -ENOMEM; | |
d2308784 | 2652 | goto out_free_5; |
c16f862d RR |
2653 | } |
2654 | ||
6aa8b732 | 2655 | kvm_chardev_ops.owner = module; |
3d3aab1b CB |
2656 | kvm_vm_fops.owner = module; |
2657 | kvm_vcpu_fops.owner = module; | |
6aa8b732 AK |
2658 | |
2659 | r = misc_register(&kvm_dev); | |
2660 | if (r) { | |
d77c26fc | 2661 | printk(KERN_ERR "kvm: misc device register failed\n"); |
6aa8b732 AK |
2662 | goto out_free; |
2663 | } | |
2664 | ||
15ad7146 AK |
2665 | kvm_preempt_ops.sched_in = kvm_sched_in; |
2666 | kvm_preempt_ops.sched_out = kvm_sched_out; | |
2667 | ||
c7addb90 | 2668 | return 0; |
6aa8b732 AK |
2669 | |
2670 | out_free: | |
c16f862d | 2671 | kmem_cache_destroy(kvm_vcpu_cache); |
d2308784 | 2672 | out_free_5: |
59ae6c6b | 2673 | sysdev_unregister(&kvm_sysdev); |
d2308784 | 2674 | out_free_4: |
59ae6c6b | 2675 | sysdev_class_unregister(&kvm_sysdev_class); |
d2308784 | 2676 | out_free_3: |
6aa8b732 | 2677 | unregister_reboot_notifier(&kvm_reboot_notifier); |
774c47f1 | 2678 | unregister_cpu_notifier(&kvm_cpu_notifier); |
d2308784 | 2679 | out_free_2: |
15c8b6c1 | 2680 | on_each_cpu(hardware_disable, NULL, 1); |
d2308784 | 2681 | out_free_1: |
e9b11c17 | 2682 | kvm_arch_hardware_unsetup(); |
7f59f492 RR |
2683 | out_free_0a: |
2684 | free_cpumask_var(cpus_hardware_enabled); | |
d2308784 ZX |
2685 | out_free_0: |
2686 | __free_page(bad_page); | |
ca45aaae | 2687 | out: |
f8c16bba | 2688 | kvm_arch_exit(); |
cb498ea2 | 2689 | kvm_exit_debug(); |
d2308784 | 2690 | out_fail: |
6aa8b732 AK |
2691 | return r; |
2692 | } | |
cb498ea2 | 2693 | EXPORT_SYMBOL_GPL(kvm_init); |
6aa8b732 | 2694 | |
cb498ea2 | 2695 | void kvm_exit(void) |
6aa8b732 | 2696 | { |
d4c9ff2d | 2697 | kvm_trace_cleanup(); |
6aa8b732 | 2698 | misc_deregister(&kvm_dev); |
c16f862d | 2699 | kmem_cache_destroy(kvm_vcpu_cache); |
59ae6c6b AK |
2700 | sysdev_unregister(&kvm_sysdev); |
2701 | sysdev_class_unregister(&kvm_sysdev_class); | |
6aa8b732 | 2702 | unregister_reboot_notifier(&kvm_reboot_notifier); |
59ae6c6b | 2703 | unregister_cpu_notifier(&kvm_cpu_notifier); |
15c8b6c1 | 2704 | on_each_cpu(hardware_disable, NULL, 1); |
e9b11c17 | 2705 | kvm_arch_hardware_unsetup(); |
f8c16bba | 2706 | kvm_arch_exit(); |
6aa8b732 | 2707 | kvm_exit_debug(); |
7f59f492 | 2708 | free_cpumask_var(cpus_hardware_enabled); |
cea7bb21 | 2709 | __free_page(bad_page); |
6aa8b732 | 2710 | } |
cb498ea2 | 2711 | EXPORT_SYMBOL_GPL(kvm_exit); |