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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 | ||
229456fc MT |
62 | #define CREATE_TRACE_POINTS |
63 | #include <trace/events/kvm.h> | |
64 | ||
6aa8b732 AK |
65 | MODULE_AUTHOR("Qumranet"); |
66 | MODULE_LICENSE("GPL"); | |
67 | ||
fa40a821 MT |
68 | /* |
69 | * Ordering of locks: | |
70 | * | |
22fc0294 | 71 | * kvm->slots_lock --> kvm->lock --> kvm->irq_lock |
fa40a821 MT |
72 | */ |
73 | ||
e9b11c17 ZX |
74 | DEFINE_SPINLOCK(kvm_lock); |
75 | LIST_HEAD(vm_list); | |
133de902 | 76 | |
7f59f492 | 77 | static cpumask_var_t cpus_hardware_enabled; |
1b6c0168 | 78 | |
c16f862d RR |
79 | struct kmem_cache *kvm_vcpu_cache; |
80 | EXPORT_SYMBOL_GPL(kvm_vcpu_cache); | |
1165f5fe | 81 | |
15ad7146 AK |
82 | static __read_mostly struct preempt_ops kvm_preempt_ops; |
83 | ||
76f7c879 | 84 | struct dentry *kvm_debugfs_dir; |
6aa8b732 | 85 | |
bccf2150 AK |
86 | static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, |
87 | unsigned long arg); | |
88 | ||
e8ba5d31 | 89 | static bool kvm_rebooting; |
4ecac3fd | 90 | |
54dee993 MT |
91 | static bool largepages_enabled = true; |
92 | ||
8a98f664 XZ |
93 | #ifdef KVM_CAP_DEVICE_ASSIGNMENT |
94 | static struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head, | |
95 | int assigned_dev_id) | |
96 | { | |
97 | struct list_head *ptr; | |
98 | struct kvm_assigned_dev_kernel *match; | |
99 | ||
100 | list_for_each(ptr, head) { | |
101 | match = list_entry(ptr, struct kvm_assigned_dev_kernel, list); | |
102 | if (match->assigned_dev_id == assigned_dev_id) | |
103 | return match; | |
104 | } | |
105 | return NULL; | |
106 | } | |
107 | ||
2350bd1f SY |
108 | static int find_index_from_host_irq(struct kvm_assigned_dev_kernel |
109 | *assigned_dev, int irq) | |
110 | { | |
111 | int i, index; | |
112 | struct msix_entry *host_msix_entries; | |
113 | ||
114 | host_msix_entries = assigned_dev->host_msix_entries; | |
115 | ||
116 | index = -1; | |
117 | for (i = 0; i < assigned_dev->entries_nr; i++) | |
118 | if (irq == host_msix_entries[i].vector) { | |
119 | index = i; | |
120 | break; | |
121 | } | |
122 | if (index < 0) { | |
123 | printk(KERN_WARNING "Fail to find correlated MSI-X entry!\n"); | |
124 | return 0; | |
125 | } | |
126 | ||
127 | return index; | |
128 | } | |
129 | ||
8a98f664 XZ |
130 | static void kvm_assigned_dev_interrupt_work_handler(struct work_struct *work) |
131 | { | |
132 | struct kvm_assigned_dev_kernel *assigned_dev; | |
2350bd1f | 133 | struct kvm *kvm; |
968a6347 | 134 | int i; |
8a98f664 XZ |
135 | |
136 | assigned_dev = container_of(work, struct kvm_assigned_dev_kernel, | |
137 | interrupt_work); | |
2350bd1f | 138 | kvm = assigned_dev->kvm; |
8a98f664 | 139 | |
fa40a821 | 140 | mutex_lock(&kvm->irq_lock); |
547de29e | 141 | spin_lock_irq(&assigned_dev->assigned_dev_lock); |
e56d532f | 142 | if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) { |
2350bd1f SY |
143 | struct kvm_guest_msix_entry *guest_entries = |
144 | assigned_dev->guest_msix_entries; | |
145 | for (i = 0; i < assigned_dev->entries_nr; i++) { | |
146 | if (!(guest_entries[i].flags & | |
147 | KVM_ASSIGNED_MSIX_PENDING)) | |
148 | continue; | |
149 | guest_entries[i].flags &= ~KVM_ASSIGNED_MSIX_PENDING; | |
150 | kvm_set_irq(assigned_dev->kvm, | |
151 | assigned_dev->irq_source_id, | |
152 | guest_entries[i].vector, 1); | |
2350bd1f | 153 | } |
968a6347 | 154 | } else |
2350bd1f SY |
155 | kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id, |
156 | assigned_dev->guest_irq, 1); | |
2350bd1f | 157 | |
547de29e | 158 | spin_unlock_irq(&assigned_dev->assigned_dev_lock); |
fa40a821 | 159 | mutex_unlock(&assigned_dev->kvm->irq_lock); |
8a98f664 XZ |
160 | } |
161 | ||
8a98f664 XZ |
162 | static irqreturn_t kvm_assigned_dev_intr(int irq, void *dev_id) |
163 | { | |
547de29e | 164 | unsigned long flags; |
8a98f664 XZ |
165 | struct kvm_assigned_dev_kernel *assigned_dev = |
166 | (struct kvm_assigned_dev_kernel *) dev_id; | |
167 | ||
547de29e | 168 | spin_lock_irqsave(&assigned_dev->assigned_dev_lock, flags); |
e56d532f | 169 | if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) { |
2350bd1f SY |
170 | int index = find_index_from_host_irq(assigned_dev, irq); |
171 | if (index < 0) | |
547de29e | 172 | goto out; |
2350bd1f SY |
173 | assigned_dev->guest_msix_entries[index].flags |= |
174 | KVM_ASSIGNED_MSIX_PENDING; | |
175 | } | |
176 | ||
8a98f664 | 177 | schedule_work(&assigned_dev->interrupt_work); |
defaf158 | 178 | |
968a6347 SY |
179 | if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_GUEST_INTX) { |
180 | disable_irq_nosync(irq); | |
181 | assigned_dev->host_irq_disabled = true; | |
182 | } | |
defaf158 | 183 | |
547de29e MT |
184 | out: |
185 | spin_unlock_irqrestore(&assigned_dev->assigned_dev_lock, flags); | |
8a98f664 XZ |
186 | return IRQ_HANDLED; |
187 | } | |
188 | ||
189 | /* Ack the irq line for an assigned device */ | |
190 | static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian) | |
191 | { | |
192 | struct kvm_assigned_dev_kernel *dev; | |
547de29e | 193 | unsigned long flags; |
8a98f664 XZ |
194 | |
195 | if (kian->gsi == -1) | |
196 | return; | |
197 | ||
198 | dev = container_of(kian, struct kvm_assigned_dev_kernel, | |
199 | ack_notifier); | |
defaf158 | 200 | |
5550af4d | 201 | kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0); |
defaf158 MM |
202 | |
203 | /* The guest irq may be shared so this ack may be | |
204 | * from another device. | |
205 | */ | |
547de29e | 206 | spin_lock_irqsave(&dev->assigned_dev_lock, flags); |
defaf158 MM |
207 | if (dev->host_irq_disabled) { |
208 | enable_irq(dev->host_irq); | |
209 | dev->host_irq_disabled = false; | |
210 | } | |
547de29e | 211 | spin_unlock_irqrestore(&dev->assigned_dev_lock, flags); |
8a98f664 XZ |
212 | } |
213 | ||
e56d532f SY |
214 | static void deassign_guest_irq(struct kvm *kvm, |
215 | struct kvm_assigned_dev_kernel *assigned_dev) | |
8a98f664 | 216 | { |
fa40a821 | 217 | kvm_unregister_irq_ack_notifier(kvm, &assigned_dev->ack_notifier); |
e56d532f | 218 | assigned_dev->ack_notifier.gsi = -1; |
f29b2673 MM |
219 | |
220 | if (assigned_dev->irq_source_id != -1) | |
221 | kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id); | |
222 | assigned_dev->irq_source_id = -1; | |
e56d532f SY |
223 | assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_GUEST_MASK); |
224 | } | |
8a98f664 | 225 | |
e56d532f SY |
226 | /* The function implicit hold kvm->lock mutex due to cancel_work_sync() */ |
227 | static void deassign_host_irq(struct kvm *kvm, | |
228 | struct kvm_assigned_dev_kernel *assigned_dev) | |
229 | { | |
ba4cef31 SY |
230 | /* |
231 | * In kvm_free_device_irq, cancel_work_sync return true if: | |
232 | * 1. work is scheduled, and then cancelled. | |
233 | * 2. work callback is executed. | |
234 | * | |
235 | * The first one ensured that the irq is disabled and no more events | |
236 | * would happen. But for the second one, the irq may be enabled (e.g. | |
237 | * for MSI). So we disable irq here to prevent further events. | |
238 | * | |
239 | * Notice this maybe result in nested disable if the interrupt type is | |
240 | * INTx, but it's OK for we are going to free it. | |
241 | * | |
242 | * If this function is a part of VM destroy, please ensure that till | |
243 | * now, the kvm state is still legal for probably we also have to wait | |
244 | * interrupt_work done. | |
245 | */ | |
e56d532f | 246 | if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) { |
d510d6cc SY |
247 | int i; |
248 | for (i = 0; i < assigned_dev->entries_nr; i++) | |
249 | disable_irq_nosync(assigned_dev-> | |
250 | host_msix_entries[i].vector); | |
251 | ||
252 | cancel_work_sync(&assigned_dev->interrupt_work); | |
253 | ||
254 | for (i = 0; i < assigned_dev->entries_nr; i++) | |
255 | free_irq(assigned_dev->host_msix_entries[i].vector, | |
256 | (void *)assigned_dev); | |
257 | ||
258 | assigned_dev->entries_nr = 0; | |
259 | kfree(assigned_dev->host_msix_entries); | |
260 | kfree(assigned_dev->guest_msix_entries); | |
261 | pci_disable_msix(assigned_dev->dev); | |
262 | } else { | |
263 | /* Deal with MSI and INTx */ | |
264 | disable_irq_nosync(assigned_dev->host_irq); | |
265 | cancel_work_sync(&assigned_dev->interrupt_work); | |
8a98f664 | 266 | |
d510d6cc | 267 | free_irq(assigned_dev->host_irq, (void *)assigned_dev); |
4a643be8 | 268 | |
e56d532f | 269 | if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSI) |
d510d6cc SY |
270 | pci_disable_msi(assigned_dev->dev); |
271 | } | |
4a643be8 | 272 | |
e56d532f SY |
273 | assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_HOST_MASK); |
274 | } | |
275 | ||
276 | static int kvm_deassign_irq(struct kvm *kvm, | |
277 | struct kvm_assigned_dev_kernel *assigned_dev, | |
278 | unsigned long irq_requested_type) | |
279 | { | |
280 | unsigned long guest_irq_type, host_irq_type; | |
281 | ||
282 | if (!irqchip_in_kernel(kvm)) | |
283 | return -EINVAL; | |
284 | /* no irq assignment to deassign */ | |
285 | if (!assigned_dev->irq_requested_type) | |
286 | return -ENXIO; | |
287 | ||
288 | host_irq_type = irq_requested_type & KVM_DEV_IRQ_HOST_MASK; | |
289 | guest_irq_type = irq_requested_type & KVM_DEV_IRQ_GUEST_MASK; | |
290 | ||
291 | if (host_irq_type) | |
292 | deassign_host_irq(kvm, assigned_dev); | |
293 | if (guest_irq_type) | |
294 | deassign_guest_irq(kvm, assigned_dev); | |
295 | ||
296 | return 0; | |
4a643be8 MM |
297 | } |
298 | ||
e56d532f SY |
299 | static void kvm_free_assigned_irq(struct kvm *kvm, |
300 | struct kvm_assigned_dev_kernel *assigned_dev) | |
301 | { | |
302 | kvm_deassign_irq(kvm, assigned_dev, assigned_dev->irq_requested_type); | |
303 | } | |
4a643be8 MM |
304 | |
305 | static void kvm_free_assigned_device(struct kvm *kvm, | |
306 | struct kvm_assigned_dev_kernel | |
307 | *assigned_dev) | |
308 | { | |
309 | kvm_free_assigned_irq(kvm, assigned_dev); | |
310 | ||
6eb55818 SY |
311 | pci_reset_function(assigned_dev->dev); |
312 | ||
8a98f664 XZ |
313 | pci_release_regions(assigned_dev->dev); |
314 | pci_disable_device(assigned_dev->dev); | |
315 | pci_dev_put(assigned_dev->dev); | |
316 | ||
317 | list_del(&assigned_dev->list); | |
318 | kfree(assigned_dev); | |
319 | } | |
320 | ||
321 | void kvm_free_all_assigned_devices(struct kvm *kvm) | |
322 | { | |
323 | struct list_head *ptr, *ptr2; | |
324 | struct kvm_assigned_dev_kernel *assigned_dev; | |
325 | ||
326 | list_for_each_safe(ptr, ptr2, &kvm->arch.assigned_dev_head) { | |
327 | assigned_dev = list_entry(ptr, | |
328 | struct kvm_assigned_dev_kernel, | |
329 | list); | |
330 | ||
331 | kvm_free_assigned_device(kvm, assigned_dev); | |
332 | } | |
333 | } | |
334 | ||
e56d532f SY |
335 | static int assigned_device_enable_host_intx(struct kvm *kvm, |
336 | struct kvm_assigned_dev_kernel *dev) | |
00e3ed39 | 337 | { |
e56d532f SY |
338 | dev->host_irq = dev->dev->irq; |
339 | /* Even though this is PCI, we don't want to use shared | |
340 | * interrupts. Sharing host devices with guest-assigned devices | |
341 | * on the same interrupt line is not a happy situation: there | |
342 | * are going to be long delays in accepting, acking, etc. | |
343 | */ | |
344 | if (request_irq(dev->host_irq, kvm_assigned_dev_intr, | |
345 | 0, "kvm_assigned_intx_device", (void *)dev)) | |
346 | return -EIO; | |
347 | return 0; | |
348 | } | |
6b9cc7fd | 349 | |
e56d532f SY |
350 | #ifdef __KVM_HAVE_MSI |
351 | static int assigned_device_enable_host_msi(struct kvm *kvm, | |
352 | struct kvm_assigned_dev_kernel *dev) | |
353 | { | |
354 | int r; | |
00e3ed39 | 355 | |
e56d532f SY |
356 | if (!dev->dev->msi_enabled) { |
357 | r = pci_enable_msi(dev->dev); | |
358 | if (r) | |
359 | return r; | |
360 | } | |
00e3ed39 | 361 | |
e56d532f SY |
362 | dev->host_irq = dev->dev->irq; |
363 | if (request_irq(dev->host_irq, kvm_assigned_dev_intr, 0, | |
364 | "kvm_assigned_msi_device", (void *)dev)) { | |
365 | pci_disable_msi(dev->dev); | |
366 | return -EIO; | |
00e3ed39 SY |
367 | } |
368 | ||
00e3ed39 SY |
369 | return 0; |
370 | } | |
e56d532f | 371 | #endif |
00e3ed39 | 372 | |
e56d532f SY |
373 | #ifdef __KVM_HAVE_MSIX |
374 | static int assigned_device_enable_host_msix(struct kvm *kvm, | |
375 | struct kvm_assigned_dev_kernel *dev) | |
6b9cc7fd | 376 | { |
e56d532f | 377 | int i, r = -EINVAL; |
6b9cc7fd | 378 | |
e56d532f SY |
379 | /* host_msix_entries and guest_msix_entries should have been |
380 | * initialized */ | |
381 | if (dev->entries_nr == 0) | |
382 | return r; | |
6b9cc7fd | 383 | |
e56d532f SY |
384 | r = pci_enable_msix(dev->dev, dev->host_msix_entries, dev->entries_nr); |
385 | if (r) | |
386 | return r; | |
6b9cc7fd | 387 | |
e56d532f SY |
388 | for (i = 0; i < dev->entries_nr; i++) { |
389 | r = request_irq(dev->host_msix_entries[i].vector, | |
390 | kvm_assigned_dev_intr, 0, | |
391 | "kvm_assigned_msix_device", | |
392 | (void *)dev); | |
393 | /* FIXME: free requested_irq's on failure */ | |
394 | if (r) | |
395 | return r; | |
396 | } | |
5319c662 | 397 | |
e56d532f SY |
398 | return 0; |
399 | } | |
6b9cc7fd | 400 | |
e56d532f | 401 | #endif |
6b9cc7fd | 402 | |
e56d532f SY |
403 | static int assigned_device_enable_guest_intx(struct kvm *kvm, |
404 | struct kvm_assigned_dev_kernel *dev, | |
405 | struct kvm_assigned_irq *irq) | |
406 | { | |
407 | dev->guest_irq = irq->guest_irq; | |
408 | dev->ack_notifier.gsi = irq->guest_irq; | |
409 | return 0; | |
410 | } | |
5319c662 | 411 | |
e56d532f SY |
412 | #ifdef __KVM_HAVE_MSI |
413 | static int assigned_device_enable_guest_msi(struct kvm *kvm, | |
414 | struct kvm_assigned_dev_kernel *dev, | |
415 | struct kvm_assigned_irq *irq) | |
416 | { | |
417 | dev->guest_irq = irq->guest_irq; | |
418 | dev->ack_notifier.gsi = -1; | |
968a6347 | 419 | dev->host_irq_disabled = false; |
6b9cc7fd SY |
420 | return 0; |
421 | } | |
422 | #endif | |
e56d532f SY |
423 | #ifdef __KVM_HAVE_MSIX |
424 | static int assigned_device_enable_guest_msix(struct kvm *kvm, | |
425 | struct kvm_assigned_dev_kernel *dev, | |
426 | struct kvm_assigned_irq *irq) | |
427 | { | |
428 | dev->guest_irq = irq->guest_irq; | |
429 | dev->ack_notifier.gsi = -1; | |
968a6347 | 430 | dev->host_irq_disabled = false; |
e56d532f SY |
431 | return 0; |
432 | } | |
433 | #endif | |
434 | ||
435 | static int assign_host_irq(struct kvm *kvm, | |
436 | struct kvm_assigned_dev_kernel *dev, | |
437 | __u32 host_irq_type) | |
438 | { | |
439 | int r = -EEXIST; | |
440 | ||
441 | if (dev->irq_requested_type & KVM_DEV_IRQ_HOST_MASK) | |
442 | return r; | |
6b9cc7fd | 443 | |
e56d532f SY |
444 | switch (host_irq_type) { |
445 | case KVM_DEV_IRQ_HOST_INTX: | |
446 | r = assigned_device_enable_host_intx(kvm, dev); | |
447 | break; | |
448 | #ifdef __KVM_HAVE_MSI | |
449 | case KVM_DEV_IRQ_HOST_MSI: | |
450 | r = assigned_device_enable_host_msi(kvm, dev); | |
451 | break; | |
452 | #endif | |
d510d6cc | 453 | #ifdef __KVM_HAVE_MSIX |
e56d532f SY |
454 | case KVM_DEV_IRQ_HOST_MSIX: |
455 | r = assigned_device_enable_host_msix(kvm, dev); | |
456 | break; | |
457 | #endif | |
458 | default: | |
459 | r = -EINVAL; | |
460 | } | |
d510d6cc | 461 | |
e56d532f SY |
462 | if (!r) |
463 | dev->irq_requested_type |= host_irq_type; | |
d510d6cc | 464 | |
e56d532f SY |
465 | return r; |
466 | } | |
d510d6cc | 467 | |
e56d532f SY |
468 | static int assign_guest_irq(struct kvm *kvm, |
469 | struct kvm_assigned_dev_kernel *dev, | |
470 | struct kvm_assigned_irq *irq, | |
471 | unsigned long guest_irq_type) | |
472 | { | |
473 | int id; | |
474 | int r = -EEXIST; | |
d510d6cc | 475 | |
e56d532f SY |
476 | if (dev->irq_requested_type & KVM_DEV_IRQ_GUEST_MASK) |
477 | return r; | |
478 | ||
479 | id = kvm_request_irq_source_id(kvm); | |
480 | if (id < 0) | |
481 | return id; | |
482 | ||
483 | dev->irq_source_id = id; | |
484 | ||
485 | switch (guest_irq_type) { | |
486 | case KVM_DEV_IRQ_GUEST_INTX: | |
487 | r = assigned_device_enable_guest_intx(kvm, dev, irq); | |
488 | break; | |
489 | #ifdef __KVM_HAVE_MSI | |
490 | case KVM_DEV_IRQ_GUEST_MSI: | |
491 | r = assigned_device_enable_guest_msi(kvm, dev, irq); | |
492 | break; | |
493 | #endif | |
494 | #ifdef __KVM_HAVE_MSIX | |
495 | case KVM_DEV_IRQ_GUEST_MSIX: | |
496 | r = assigned_device_enable_guest_msix(kvm, dev, irq); | |
497 | break; | |
498 | #endif | |
499 | default: | |
500 | r = -EINVAL; | |
d510d6cc SY |
501 | } |
502 | ||
e56d532f SY |
503 | if (!r) { |
504 | dev->irq_requested_type |= guest_irq_type; | |
505 | kvm_register_irq_ack_notifier(kvm, &dev->ack_notifier); | |
506 | } else | |
507 | kvm_free_irq_source_id(kvm, dev->irq_source_id); | |
d510d6cc | 508 | |
e56d532f | 509 | return r; |
d510d6cc | 510 | } |
d510d6cc | 511 | |
e56d532f | 512 | /* TODO Deal with KVM_DEV_IRQ_ASSIGNED_MASK_MSIX */ |
8a98f664 | 513 | static int kvm_vm_ioctl_assign_irq(struct kvm *kvm, |
e56d532f | 514 | struct kvm_assigned_irq *assigned_irq) |
8a98f664 | 515 | { |
e56d532f | 516 | int r = -EINVAL; |
8a98f664 | 517 | struct kvm_assigned_dev_kernel *match; |
e56d532f | 518 | unsigned long host_irq_type, guest_irq_type; |
8a98f664 | 519 | |
e56d532f SY |
520 | if (!capable(CAP_SYS_RAWIO)) |
521 | return -EPERM; | |
8a98f664 | 522 | |
e56d532f SY |
523 | if (!irqchip_in_kernel(kvm)) |
524 | return r; | |
525 | ||
526 | mutex_lock(&kvm->lock); | |
527 | r = -ENODEV; | |
8a98f664 XZ |
528 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, |
529 | assigned_irq->assigned_dev_id); | |
e56d532f SY |
530 | if (!match) |
531 | goto out; | |
8a98f664 | 532 | |
e56d532f SY |
533 | host_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_HOST_MASK); |
534 | guest_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_GUEST_MASK); | |
17071fe7 | 535 | |
e56d532f SY |
536 | r = -EINVAL; |
537 | /* can only assign one type at a time */ | |
538 | if (hweight_long(host_irq_type) > 1) | |
539 | goto out; | |
540 | if (hweight_long(guest_irq_type) > 1) | |
541 | goto out; | |
542 | if (host_irq_type == 0 && guest_irq_type == 0) | |
543 | goto out; | |
17071fe7 | 544 | |
e56d532f SY |
545 | r = 0; |
546 | if (host_irq_type) | |
547 | r = assign_host_irq(kvm, match, host_irq_type); | |
548 | if (r) | |
549 | goto out; | |
8a98f664 | 550 | |
e56d532f SY |
551 | if (guest_irq_type) |
552 | r = assign_guest_irq(kvm, match, assigned_irq, guest_irq_type); | |
553 | out: | |
8a98f664 XZ |
554 | mutex_unlock(&kvm->lock); |
555 | return r; | |
e56d532f SY |
556 | } |
557 | ||
558 | static int kvm_vm_ioctl_deassign_dev_irq(struct kvm *kvm, | |
559 | struct kvm_assigned_irq | |
560 | *assigned_irq) | |
561 | { | |
562 | int r = -ENODEV; | |
563 | struct kvm_assigned_dev_kernel *match; | |
564 | ||
565 | mutex_lock(&kvm->lock); | |
566 | ||
567 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
568 | assigned_irq->assigned_dev_id); | |
569 | if (!match) | |
570 | goto out; | |
571 | ||
572 | r = kvm_deassign_irq(kvm, match, assigned_irq->flags); | |
573 | out: | |
8a98f664 | 574 | mutex_unlock(&kvm->lock); |
8a98f664 XZ |
575 | return r; |
576 | } | |
577 | ||
578 | static int kvm_vm_ioctl_assign_device(struct kvm *kvm, | |
579 | struct kvm_assigned_pci_dev *assigned_dev) | |
580 | { | |
581 | int r = 0; | |
582 | struct kvm_assigned_dev_kernel *match; | |
583 | struct pci_dev *dev; | |
584 | ||
682edb4c | 585 | down_read(&kvm->slots_lock); |
8a98f664 XZ |
586 | mutex_lock(&kvm->lock); |
587 | ||
588 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
589 | assigned_dev->assigned_dev_id); | |
590 | if (match) { | |
591 | /* device already assigned */ | |
e56d532f | 592 | r = -EEXIST; |
8a98f664 XZ |
593 | goto out; |
594 | } | |
595 | ||
596 | match = kzalloc(sizeof(struct kvm_assigned_dev_kernel), GFP_KERNEL); | |
597 | if (match == NULL) { | |
598 | printk(KERN_INFO "%s: Couldn't allocate memory\n", | |
599 | __func__); | |
600 | r = -ENOMEM; | |
601 | goto out; | |
602 | } | |
603 | dev = pci_get_bus_and_slot(assigned_dev->busnr, | |
604 | assigned_dev->devfn); | |
605 | if (!dev) { | |
606 | printk(KERN_INFO "%s: host device not found\n", __func__); | |
607 | r = -EINVAL; | |
608 | goto out_free; | |
609 | } | |
610 | if (pci_enable_device(dev)) { | |
611 | printk(KERN_INFO "%s: Could not enable PCI device\n", __func__); | |
612 | r = -EBUSY; | |
613 | goto out_put; | |
614 | } | |
615 | r = pci_request_regions(dev, "kvm_assigned_device"); | |
616 | if (r) { | |
617 | printk(KERN_INFO "%s: Could not get access to device regions\n", | |
618 | __func__); | |
619 | goto out_disable; | |
620 | } | |
6eb55818 SY |
621 | |
622 | pci_reset_function(dev); | |
623 | ||
8a98f664 XZ |
624 | match->assigned_dev_id = assigned_dev->assigned_dev_id; |
625 | match->host_busnr = assigned_dev->busnr; | |
626 | match->host_devfn = assigned_dev->devfn; | |
b653574a | 627 | match->flags = assigned_dev->flags; |
8a98f664 | 628 | match->dev = dev; |
547de29e | 629 | spin_lock_init(&match->assigned_dev_lock); |
f29b2673 | 630 | match->irq_source_id = -1; |
8a98f664 | 631 | match->kvm = kvm; |
e56d532f SY |
632 | match->ack_notifier.irq_acked = kvm_assigned_dev_ack_irq; |
633 | INIT_WORK(&match->interrupt_work, | |
634 | kvm_assigned_dev_interrupt_work_handler); | |
8a98f664 XZ |
635 | |
636 | list_add(&match->list, &kvm->arch.assigned_dev_head); | |
637 | ||
638 | if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) { | |
19de40a8 | 639 | if (!kvm->arch.iommu_domain) { |
260782bc WH |
640 | r = kvm_iommu_map_guest(kvm); |
641 | if (r) | |
642 | goto out_list_del; | |
643 | } | |
644 | r = kvm_assign_device(kvm, match); | |
8a98f664 XZ |
645 | if (r) |
646 | goto out_list_del; | |
647 | } | |
648 | ||
649 | out: | |
650 | mutex_unlock(&kvm->lock); | |
682edb4c | 651 | up_read(&kvm->slots_lock); |
8a98f664 XZ |
652 | return r; |
653 | out_list_del: | |
654 | list_del(&match->list); | |
655 | pci_release_regions(dev); | |
656 | out_disable: | |
657 | pci_disable_device(dev); | |
658 | out_put: | |
659 | pci_dev_put(dev); | |
660 | out_free: | |
661 | kfree(match); | |
662 | mutex_unlock(&kvm->lock); | |
682edb4c | 663 | up_read(&kvm->slots_lock); |
8a98f664 XZ |
664 | return r; |
665 | } | |
666 | #endif | |
667 | ||
0a920356 WH |
668 | #ifdef KVM_CAP_DEVICE_DEASSIGNMENT |
669 | static int kvm_vm_ioctl_deassign_device(struct kvm *kvm, | |
670 | struct kvm_assigned_pci_dev *assigned_dev) | |
671 | { | |
672 | int r = 0; | |
673 | struct kvm_assigned_dev_kernel *match; | |
674 | ||
675 | mutex_lock(&kvm->lock); | |
676 | ||
677 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
678 | assigned_dev->assigned_dev_id); | |
679 | if (!match) { | |
680 | printk(KERN_INFO "%s: device hasn't been assigned before, " | |
681 | "so cannot be deassigned\n", __func__); | |
682 | r = -EINVAL; | |
683 | goto out; | |
684 | } | |
685 | ||
4a906e49 | 686 | if (match->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) |
0a920356 WH |
687 | kvm_deassign_device(kvm, match); |
688 | ||
689 | kvm_free_assigned_device(kvm, match); | |
690 | ||
691 | out: | |
692 | mutex_unlock(&kvm->lock); | |
693 | return r; | |
694 | } | |
695 | #endif | |
696 | ||
c77fb9dc | 697 | inline int kvm_is_mmio_pfn(pfn_t pfn) |
cbff90a7 | 698 | { |
fc5659c8 JR |
699 | if (pfn_valid(pfn)) { |
700 | struct page *page = compound_head(pfn_to_page(pfn)); | |
701 | return PageReserved(page); | |
702 | } | |
cbff90a7 BAY |
703 | |
704 | return true; | |
705 | } | |
706 | ||
bccf2150 AK |
707 | /* |
708 | * Switches to specified vcpu, until a matching vcpu_put() | |
709 | */ | |
313a3dc7 | 710 | void vcpu_load(struct kvm_vcpu *vcpu) |
6aa8b732 | 711 | { |
15ad7146 AK |
712 | int cpu; |
713 | ||
bccf2150 | 714 | mutex_lock(&vcpu->mutex); |
15ad7146 AK |
715 | cpu = get_cpu(); |
716 | preempt_notifier_register(&vcpu->preempt_notifier); | |
313a3dc7 | 717 | kvm_arch_vcpu_load(vcpu, cpu); |
15ad7146 | 718 | put_cpu(); |
6aa8b732 AK |
719 | } |
720 | ||
313a3dc7 | 721 | void vcpu_put(struct kvm_vcpu *vcpu) |
6aa8b732 | 722 | { |
15ad7146 | 723 | preempt_disable(); |
313a3dc7 | 724 | kvm_arch_vcpu_put(vcpu); |
15ad7146 AK |
725 | preempt_notifier_unregister(&vcpu->preempt_notifier); |
726 | preempt_enable(); | |
6aa8b732 AK |
727 | mutex_unlock(&vcpu->mutex); |
728 | } | |
729 | ||
d9e368d6 AK |
730 | static void ack_flush(void *_completed) |
731 | { | |
d9e368d6 AK |
732 | } |
733 | ||
49846896 | 734 | static bool make_all_cpus_request(struct kvm *kvm, unsigned int req) |
d9e368d6 | 735 | { |
597a5f55 | 736 | int i, cpu, me; |
6ef7a1bc RR |
737 | cpumask_var_t cpus; |
738 | bool called = true; | |
d9e368d6 | 739 | struct kvm_vcpu *vcpu; |
d9e368d6 | 740 | |
79f55997 | 741 | zalloc_cpumask_var(&cpus, GFP_ATOMIC); |
6ef7a1bc | 742 | |
84261923 | 743 | spin_lock(&kvm->requests_lock); |
e601e3be | 744 | me = smp_processor_id(); |
988a2cae | 745 | kvm_for_each_vcpu(i, vcpu, kvm) { |
49846896 | 746 | if (test_and_set_bit(req, &vcpu->requests)) |
d9e368d6 AK |
747 | continue; |
748 | cpu = vcpu->cpu; | |
6ef7a1bc RR |
749 | if (cpus != NULL && cpu != -1 && cpu != me) |
750 | cpumask_set_cpu(cpu, cpus); | |
49846896 | 751 | } |
6ef7a1bc RR |
752 | if (unlikely(cpus == NULL)) |
753 | smp_call_function_many(cpu_online_mask, ack_flush, NULL, 1); | |
754 | else if (!cpumask_empty(cpus)) | |
755 | smp_call_function_many(cpus, ack_flush, NULL, 1); | |
756 | else | |
757 | called = false; | |
84261923 | 758 | spin_unlock(&kvm->requests_lock); |
6ef7a1bc | 759 | free_cpumask_var(cpus); |
49846896 | 760 | return called; |
d9e368d6 AK |
761 | } |
762 | ||
49846896 | 763 | void kvm_flush_remote_tlbs(struct kvm *kvm) |
2e53d63a | 764 | { |
49846896 RR |
765 | if (make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH)) |
766 | ++kvm->stat.remote_tlb_flush; | |
2e53d63a MT |
767 | } |
768 | ||
49846896 RR |
769 | void kvm_reload_remote_mmus(struct kvm *kvm) |
770 | { | |
771 | make_all_cpus_request(kvm, KVM_REQ_MMU_RELOAD); | |
772 | } | |
2e53d63a | 773 | |
fb3f0f51 RR |
774 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) |
775 | { | |
776 | struct page *page; | |
777 | int r; | |
778 | ||
779 | mutex_init(&vcpu->mutex); | |
780 | vcpu->cpu = -1; | |
fb3f0f51 RR |
781 | vcpu->kvm = kvm; |
782 | vcpu->vcpu_id = id; | |
b6958ce4 | 783 | init_waitqueue_head(&vcpu->wq); |
fb3f0f51 RR |
784 | |
785 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
786 | if (!page) { | |
787 | r = -ENOMEM; | |
788 | goto fail; | |
789 | } | |
790 | vcpu->run = page_address(page); | |
791 | ||
e9b11c17 | 792 | r = kvm_arch_vcpu_init(vcpu); |
fb3f0f51 | 793 | if (r < 0) |
e9b11c17 | 794 | goto fail_free_run; |
fb3f0f51 RR |
795 | return 0; |
796 | ||
fb3f0f51 RR |
797 | fail_free_run: |
798 | free_page((unsigned long)vcpu->run); | |
799 | fail: | |
76fafa5e | 800 | return r; |
fb3f0f51 RR |
801 | } |
802 | EXPORT_SYMBOL_GPL(kvm_vcpu_init); | |
803 | ||
804 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) | |
805 | { | |
e9b11c17 | 806 | kvm_arch_vcpu_uninit(vcpu); |
fb3f0f51 RR |
807 | free_page((unsigned long)vcpu->run); |
808 | } | |
809 | EXPORT_SYMBOL_GPL(kvm_vcpu_uninit); | |
810 | ||
e930bffe AA |
811 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
812 | static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn) | |
813 | { | |
814 | return container_of(mn, struct kvm, mmu_notifier); | |
815 | } | |
816 | ||
817 | static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn, | |
818 | struct mm_struct *mm, | |
819 | unsigned long address) | |
820 | { | |
821 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
822 | int need_tlb_flush; | |
823 | ||
824 | /* | |
825 | * When ->invalidate_page runs, the linux pte has been zapped | |
826 | * already but the page is still allocated until | |
827 | * ->invalidate_page returns. So if we increase the sequence | |
828 | * here the kvm page fault will notice if the spte can't be | |
829 | * established because the page is going to be freed. If | |
830 | * instead the kvm page fault establishes the spte before | |
831 | * ->invalidate_page runs, kvm_unmap_hva will release it | |
832 | * before returning. | |
833 | * | |
834 | * The sequence increase only need to be seen at spin_unlock | |
835 | * time, and not at spin_lock time. | |
836 | * | |
837 | * Increasing the sequence after the spin_unlock would be | |
838 | * unsafe because the kvm page fault could then establish the | |
839 | * pte after kvm_unmap_hva returned, without noticing the page | |
840 | * is going to be freed. | |
841 | */ | |
842 | spin_lock(&kvm->mmu_lock); | |
843 | kvm->mmu_notifier_seq++; | |
844 | need_tlb_flush = kvm_unmap_hva(kvm, address); | |
845 | spin_unlock(&kvm->mmu_lock); | |
846 | ||
847 | /* we've to flush the tlb before the pages can be freed */ | |
848 | if (need_tlb_flush) | |
849 | kvm_flush_remote_tlbs(kvm); | |
850 | ||
851 | } | |
852 | ||
3da0dd43 IE |
853 | static void kvm_mmu_notifier_change_pte(struct mmu_notifier *mn, |
854 | struct mm_struct *mm, | |
855 | unsigned long address, | |
856 | pte_t pte) | |
857 | { | |
858 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
859 | ||
860 | spin_lock(&kvm->mmu_lock); | |
861 | kvm->mmu_notifier_seq++; | |
862 | kvm_set_spte_hva(kvm, address, pte); | |
863 | spin_unlock(&kvm->mmu_lock); | |
864 | } | |
865 | ||
e930bffe AA |
866 | static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, |
867 | struct mm_struct *mm, | |
868 | unsigned long start, | |
869 | unsigned long end) | |
870 | { | |
871 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
872 | int need_tlb_flush = 0; | |
873 | ||
874 | spin_lock(&kvm->mmu_lock); | |
875 | /* | |
876 | * The count increase must become visible at unlock time as no | |
877 | * spte can be established without taking the mmu_lock and | |
878 | * count is also read inside the mmu_lock critical section. | |
879 | */ | |
880 | kvm->mmu_notifier_count++; | |
881 | for (; start < end; start += PAGE_SIZE) | |
882 | need_tlb_flush |= kvm_unmap_hva(kvm, start); | |
883 | spin_unlock(&kvm->mmu_lock); | |
884 | ||
885 | /* we've to flush the tlb before the pages can be freed */ | |
886 | if (need_tlb_flush) | |
887 | kvm_flush_remote_tlbs(kvm); | |
888 | } | |
889 | ||
890 | static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn, | |
891 | struct mm_struct *mm, | |
892 | unsigned long start, | |
893 | unsigned long end) | |
894 | { | |
895 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
896 | ||
897 | spin_lock(&kvm->mmu_lock); | |
898 | /* | |
899 | * This sequence increase will notify the kvm page fault that | |
900 | * the page that is going to be mapped in the spte could have | |
901 | * been freed. | |
902 | */ | |
903 | kvm->mmu_notifier_seq++; | |
904 | /* | |
905 | * The above sequence increase must be visible before the | |
906 | * below count decrease but both values are read by the kvm | |
907 | * page fault under mmu_lock spinlock so we don't need to add | |
908 | * a smb_wmb() here in between the two. | |
909 | */ | |
910 | kvm->mmu_notifier_count--; | |
911 | spin_unlock(&kvm->mmu_lock); | |
912 | ||
913 | BUG_ON(kvm->mmu_notifier_count < 0); | |
914 | } | |
915 | ||
916 | static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn, | |
917 | struct mm_struct *mm, | |
918 | unsigned long address) | |
919 | { | |
920 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
921 | int young; | |
922 | ||
923 | spin_lock(&kvm->mmu_lock); | |
924 | young = kvm_age_hva(kvm, address); | |
925 | spin_unlock(&kvm->mmu_lock); | |
926 | ||
927 | if (young) | |
928 | kvm_flush_remote_tlbs(kvm); | |
929 | ||
930 | return young; | |
931 | } | |
932 | ||
85db06e5 MT |
933 | static void kvm_mmu_notifier_release(struct mmu_notifier *mn, |
934 | struct mm_struct *mm) | |
935 | { | |
936 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
937 | kvm_arch_flush_shadow(kvm); | |
938 | } | |
939 | ||
e930bffe AA |
940 | static const struct mmu_notifier_ops kvm_mmu_notifier_ops = { |
941 | .invalidate_page = kvm_mmu_notifier_invalidate_page, | |
942 | .invalidate_range_start = kvm_mmu_notifier_invalidate_range_start, | |
943 | .invalidate_range_end = kvm_mmu_notifier_invalidate_range_end, | |
944 | .clear_flush_young = kvm_mmu_notifier_clear_flush_young, | |
3da0dd43 | 945 | .change_pte = kvm_mmu_notifier_change_pte, |
85db06e5 | 946 | .release = kvm_mmu_notifier_release, |
e930bffe AA |
947 | }; |
948 | #endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */ | |
949 | ||
f17abe9a | 950 | static struct kvm *kvm_create_vm(void) |
6aa8b732 | 951 | { |
d19a9cd2 | 952 | struct kvm *kvm = kvm_arch_create_vm(); |
5f94c174 LV |
953 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
954 | struct page *page; | |
955 | #endif | |
6aa8b732 | 956 | |
d19a9cd2 ZX |
957 | if (IS_ERR(kvm)) |
958 | goto out; | |
75858a84 AK |
959 | #ifdef CONFIG_HAVE_KVM_IRQCHIP |
960 | INIT_HLIST_HEAD(&kvm->mask_notifier_list); | |
961 | #endif | |
6aa8b732 | 962 | |
5f94c174 LV |
963 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
964 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
965 | if (!page) { | |
966 | kfree(kvm); | |
967 | return ERR_PTR(-ENOMEM); | |
968 | } | |
969 | kvm->coalesced_mmio_ring = | |
970 | (struct kvm_coalesced_mmio_ring *)page_address(page); | |
971 | #endif | |
972 | ||
e930bffe AA |
973 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
974 | { | |
975 | int err; | |
976 | kvm->mmu_notifier.ops = &kvm_mmu_notifier_ops; | |
977 | err = mmu_notifier_register(&kvm->mmu_notifier, current->mm); | |
978 | if (err) { | |
979 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
980 | put_page(page); | |
981 | #endif | |
982 | kfree(kvm); | |
983 | return ERR_PTR(err); | |
984 | } | |
985 | } | |
986 | #endif | |
987 | ||
6d4e4c4f AK |
988 | kvm->mm = current->mm; |
989 | atomic_inc(&kvm->mm->mm_count); | |
aaee2c94 | 990 | spin_lock_init(&kvm->mmu_lock); |
84261923 | 991 | spin_lock_init(&kvm->requests_lock); |
74906345 | 992 | kvm_io_bus_init(&kvm->pio_bus); |
d34e6b17 | 993 | kvm_eventfd_init(kvm); |
11ec2804 | 994 | mutex_init(&kvm->lock); |
60eead79 | 995 | mutex_init(&kvm->irq_lock); |
2eeb2e94 | 996 | kvm_io_bus_init(&kvm->mmio_bus); |
72dc67a6 | 997 | init_rwsem(&kvm->slots_lock); |
d39f13b0 | 998 | atomic_set(&kvm->users_count, 1); |
5e58cfe4 RR |
999 | spin_lock(&kvm_lock); |
1000 | list_add(&kvm->vm_list, &vm_list); | |
1001 | spin_unlock(&kvm_lock); | |
5f94c174 LV |
1002 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
1003 | kvm_coalesced_mmio_init(kvm); | |
1004 | #endif | |
d19a9cd2 | 1005 | out: |
f17abe9a AK |
1006 | return kvm; |
1007 | } | |
1008 | ||
6aa8b732 AK |
1009 | /* |
1010 | * Free any memory in @free but not in @dont. | |
1011 | */ | |
1012 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, | |
1013 | struct kvm_memory_slot *dont) | |
1014 | { | |
ec04b260 JR |
1015 | int i; |
1016 | ||
290fc38d IE |
1017 | if (!dont || free->rmap != dont->rmap) |
1018 | vfree(free->rmap); | |
6aa8b732 AK |
1019 | |
1020 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) | |
1021 | vfree(free->dirty_bitmap); | |
1022 | ||
ec04b260 JR |
1023 | |
1024 | for (i = 0; i < KVM_NR_PAGE_SIZES - 1; ++i) { | |
1025 | if (!dont || free->lpage_info[i] != dont->lpage_info[i]) { | |
1026 | vfree(free->lpage_info[i]); | |
1027 | free->lpage_info[i] = NULL; | |
1028 | } | |
1029 | } | |
05da4558 | 1030 | |
6aa8b732 | 1031 | free->npages = 0; |
8b6d44c7 | 1032 | free->dirty_bitmap = NULL; |
8d4e1288 | 1033 | free->rmap = NULL; |
6aa8b732 AK |
1034 | } |
1035 | ||
d19a9cd2 | 1036 | void kvm_free_physmem(struct kvm *kvm) |
6aa8b732 AK |
1037 | { |
1038 | int i; | |
1039 | ||
1040 | for (i = 0; i < kvm->nmemslots; ++i) | |
8b6d44c7 | 1041 | kvm_free_physmem_slot(&kvm->memslots[i], NULL); |
6aa8b732 AK |
1042 | } |
1043 | ||
f17abe9a AK |
1044 | static void kvm_destroy_vm(struct kvm *kvm) |
1045 | { | |
6d4e4c4f AK |
1046 | struct mm_struct *mm = kvm->mm; |
1047 | ||
ad8ba2cd | 1048 | kvm_arch_sync_events(kvm); |
133de902 AK |
1049 | spin_lock(&kvm_lock); |
1050 | list_del(&kvm->vm_list); | |
1051 | spin_unlock(&kvm_lock); | |
399ec807 | 1052 | kvm_free_irq_routing(kvm); |
74906345 | 1053 | kvm_io_bus_destroy(&kvm->pio_bus); |
2eeb2e94 | 1054 | kvm_io_bus_destroy(&kvm->mmio_bus); |
5f94c174 LV |
1055 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
1056 | if (kvm->coalesced_mmio_ring != NULL) | |
1057 | free_page((unsigned long)kvm->coalesced_mmio_ring); | |
e930bffe AA |
1058 | #endif |
1059 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) | |
1060 | mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm); | |
f00be0ca GN |
1061 | #else |
1062 | kvm_arch_flush_shadow(kvm); | |
5f94c174 | 1063 | #endif |
d19a9cd2 | 1064 | kvm_arch_destroy_vm(kvm); |
6d4e4c4f | 1065 | mmdrop(mm); |
f17abe9a AK |
1066 | } |
1067 | ||
d39f13b0 IE |
1068 | void kvm_get_kvm(struct kvm *kvm) |
1069 | { | |
1070 | atomic_inc(&kvm->users_count); | |
1071 | } | |
1072 | EXPORT_SYMBOL_GPL(kvm_get_kvm); | |
1073 | ||
1074 | void kvm_put_kvm(struct kvm *kvm) | |
1075 | { | |
1076 | if (atomic_dec_and_test(&kvm->users_count)) | |
1077 | kvm_destroy_vm(kvm); | |
1078 | } | |
1079 | EXPORT_SYMBOL_GPL(kvm_put_kvm); | |
1080 | ||
1081 | ||
f17abe9a AK |
1082 | static int kvm_vm_release(struct inode *inode, struct file *filp) |
1083 | { | |
1084 | struct kvm *kvm = filp->private_data; | |
1085 | ||
721eecbf GH |
1086 | kvm_irqfd_release(kvm); |
1087 | ||
d39f13b0 | 1088 | kvm_put_kvm(kvm); |
6aa8b732 AK |
1089 | return 0; |
1090 | } | |
1091 | ||
6aa8b732 AK |
1092 | /* |
1093 | * Allocate some memory and give it an address in the guest physical address | |
1094 | * space. | |
1095 | * | |
1096 | * Discontiguous memory is allowed, mostly for framebuffers. | |
f78e0e2e | 1097 | * |
10589a46 | 1098 | * Must be called holding mmap_sem for write. |
6aa8b732 | 1099 | */ |
f78e0e2e SY |
1100 | int __kvm_set_memory_region(struct kvm *kvm, |
1101 | struct kvm_userspace_memory_region *mem, | |
1102 | int user_alloc) | |
6aa8b732 AK |
1103 | { |
1104 | int r; | |
1105 | gfn_t base_gfn; | |
28bcb112 HC |
1106 | unsigned long npages; |
1107 | unsigned long i; | |
6aa8b732 AK |
1108 | struct kvm_memory_slot *memslot; |
1109 | struct kvm_memory_slot old, new; | |
6aa8b732 AK |
1110 | |
1111 | r = -EINVAL; | |
1112 | /* General sanity checks */ | |
1113 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
1114 | goto out; | |
1115 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) | |
1116 | goto out; | |
e7cacd40 | 1117 | if (user_alloc && (mem->userspace_addr & (PAGE_SIZE - 1))) |
78749809 | 1118 | goto out; |
e0d62c7f | 1119 | if (mem->slot >= KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS) |
6aa8b732 AK |
1120 | goto out; |
1121 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) | |
1122 | goto out; | |
1123 | ||
1124 | memslot = &kvm->memslots[mem->slot]; | |
1125 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; | |
1126 | npages = mem->memory_size >> PAGE_SHIFT; | |
1127 | ||
1128 | if (!npages) | |
1129 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; | |
1130 | ||
6aa8b732 AK |
1131 | new = old = *memslot; |
1132 | ||
1133 | new.base_gfn = base_gfn; | |
1134 | new.npages = npages; | |
1135 | new.flags = mem->flags; | |
1136 | ||
1137 | /* Disallow changing a memory slot's size. */ | |
1138 | r = -EINVAL; | |
1139 | if (npages && old.npages && npages != old.npages) | |
f78e0e2e | 1140 | goto out_free; |
6aa8b732 AK |
1141 | |
1142 | /* Check for overlaps */ | |
1143 | r = -EEXIST; | |
1144 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
1145 | struct kvm_memory_slot *s = &kvm->memslots[i]; | |
1146 | ||
4cd481f6 | 1147 | if (s == memslot || !s->npages) |
6aa8b732 AK |
1148 | continue; |
1149 | if (!((base_gfn + npages <= s->base_gfn) || | |
1150 | (base_gfn >= s->base_gfn + s->npages))) | |
f78e0e2e | 1151 | goto out_free; |
6aa8b732 | 1152 | } |
6aa8b732 | 1153 | |
6aa8b732 AK |
1154 | /* Free page dirty bitmap if unneeded */ |
1155 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8b6d44c7 | 1156 | new.dirty_bitmap = NULL; |
6aa8b732 AK |
1157 | |
1158 | r = -ENOMEM; | |
1159 | ||
1160 | /* Allocate if a slot is being created */ | |
eff0114a | 1161 | #ifndef CONFIG_S390 |
8d4e1288 | 1162 | if (npages && !new.rmap) { |
d77c26fc | 1163 | new.rmap = vmalloc(npages * sizeof(struct page *)); |
290fc38d IE |
1164 | |
1165 | if (!new.rmap) | |
f78e0e2e | 1166 | goto out_free; |
290fc38d | 1167 | |
290fc38d | 1168 | memset(new.rmap, 0, npages * sizeof(*new.rmap)); |
8d4e1288 | 1169 | |
80b14b5b | 1170 | new.user_alloc = user_alloc; |
604b38ac AA |
1171 | /* |
1172 | * hva_to_rmmap() serialzies with the mmu_lock and to be | |
1173 | * safe it has to ignore memslots with !user_alloc && | |
1174 | * !userspace_addr. | |
1175 | */ | |
1176 | if (user_alloc) | |
1177 | new.userspace_addr = mem->userspace_addr; | |
1178 | else | |
1179 | new.userspace_addr = 0; | |
6aa8b732 | 1180 | } |
ec04b260 JR |
1181 | if (!npages) |
1182 | goto skip_lpage; | |
05da4558 | 1183 | |
ec04b260 | 1184 | for (i = 0; i < KVM_NR_PAGE_SIZES - 1; ++i) { |
28bcb112 HC |
1185 | unsigned long ugfn; |
1186 | unsigned long j; | |
1187 | int lpages; | |
ec04b260 | 1188 | int level = i + 2; |
05da4558 | 1189 | |
ec04b260 JR |
1190 | /* Avoid unused variable warning if no large pages */ |
1191 | (void)level; | |
1192 | ||
1193 | if (new.lpage_info[i]) | |
1194 | continue; | |
1195 | ||
1196 | lpages = 1 + (base_gfn + npages - 1) / | |
1197 | KVM_PAGES_PER_HPAGE(level); | |
1198 | lpages -= base_gfn / KVM_PAGES_PER_HPAGE(level); | |
1199 | ||
1200 | new.lpage_info[i] = vmalloc(lpages * sizeof(*new.lpage_info[i])); | |
1201 | ||
1202 | if (!new.lpage_info[i]) | |
05da4558 MT |
1203 | goto out_free; |
1204 | ||
ec04b260 JR |
1205 | memset(new.lpage_info[i], 0, |
1206 | lpages * sizeof(*new.lpage_info[i])); | |
05da4558 | 1207 | |
ec04b260 JR |
1208 | if (base_gfn % KVM_PAGES_PER_HPAGE(level)) |
1209 | new.lpage_info[i][0].write_count = 1; | |
1210 | if ((base_gfn+npages) % KVM_PAGES_PER_HPAGE(level)) | |
1211 | new.lpage_info[i][lpages - 1].write_count = 1; | |
ac04527f AK |
1212 | ugfn = new.userspace_addr >> PAGE_SHIFT; |
1213 | /* | |
1214 | * If the gfn and userspace address are not aligned wrt each | |
54dee993 MT |
1215 | * other, or if explicitly asked to, disable large page |
1216 | * support for this slot | |
ac04527f | 1217 | */ |
ec04b260 | 1218 | if ((base_gfn ^ ugfn) & (KVM_PAGES_PER_HPAGE(level) - 1) || |
54dee993 | 1219 | !largepages_enabled) |
ec04b260 JR |
1220 | for (j = 0; j < lpages; ++j) |
1221 | new.lpage_info[i][j].write_count = 1; | |
05da4558 | 1222 | } |
6aa8b732 | 1223 | |
ec04b260 JR |
1224 | skip_lpage: |
1225 | ||
6aa8b732 AK |
1226 | /* Allocate page dirty bitmap if needed */ |
1227 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { | |
1228 | unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8; | |
1229 | ||
1230 | new.dirty_bitmap = vmalloc(dirty_bytes); | |
1231 | if (!new.dirty_bitmap) | |
f78e0e2e | 1232 | goto out_free; |
6aa8b732 | 1233 | memset(new.dirty_bitmap, 0, dirty_bytes); |
e244584f IE |
1234 | if (old.npages) |
1235 | kvm_arch_flush_shadow(kvm); | |
6aa8b732 | 1236 | } |
3eea8437 CB |
1237 | #else /* not defined CONFIG_S390 */ |
1238 | new.user_alloc = user_alloc; | |
1239 | if (user_alloc) | |
1240 | new.userspace_addr = mem->userspace_addr; | |
eff0114a | 1241 | #endif /* not defined CONFIG_S390 */ |
6aa8b732 | 1242 | |
34d4cb8f MT |
1243 | if (!npages) |
1244 | kvm_arch_flush_shadow(kvm); | |
1245 | ||
604b38ac AA |
1246 | spin_lock(&kvm->mmu_lock); |
1247 | if (mem->slot >= kvm->nmemslots) | |
1248 | kvm->nmemslots = mem->slot + 1; | |
1249 | ||
3ad82a7e | 1250 | *memslot = new; |
604b38ac | 1251 | spin_unlock(&kvm->mmu_lock); |
3ad82a7e | 1252 | |
0de10343 ZX |
1253 | r = kvm_arch_set_memory_region(kvm, mem, old, user_alloc); |
1254 | if (r) { | |
604b38ac | 1255 | spin_lock(&kvm->mmu_lock); |
0de10343 | 1256 | *memslot = old; |
604b38ac | 1257 | spin_unlock(&kvm->mmu_lock); |
0de10343 | 1258 | goto out_free; |
82ce2c96 IE |
1259 | } |
1260 | ||
6f897248 GC |
1261 | kvm_free_physmem_slot(&old, npages ? &new : NULL); |
1262 | /* Slot deletion case: we have to update the current slot */ | |
b43b1901 | 1263 | spin_lock(&kvm->mmu_lock); |
6f897248 GC |
1264 | if (!npages) |
1265 | *memslot = old; | |
b43b1901 | 1266 | spin_unlock(&kvm->mmu_lock); |
8a98f664 | 1267 | #ifdef CONFIG_DMAR |
62c476c7 BAY |
1268 | /* map the pages in iommu page table */ |
1269 | r = kvm_iommu_map_pages(kvm, base_gfn, npages); | |
1270 | if (r) | |
1271 | goto out; | |
8a98f664 | 1272 | #endif |
6aa8b732 AK |
1273 | return 0; |
1274 | ||
f78e0e2e | 1275 | out_free: |
6aa8b732 AK |
1276 | kvm_free_physmem_slot(&new, &old); |
1277 | out: | |
1278 | return r; | |
210c7c4d IE |
1279 | |
1280 | } | |
f78e0e2e SY |
1281 | EXPORT_SYMBOL_GPL(__kvm_set_memory_region); |
1282 | ||
1283 | int kvm_set_memory_region(struct kvm *kvm, | |
1284 | struct kvm_userspace_memory_region *mem, | |
1285 | int user_alloc) | |
1286 | { | |
1287 | int r; | |
1288 | ||
72dc67a6 | 1289 | down_write(&kvm->slots_lock); |
f78e0e2e | 1290 | r = __kvm_set_memory_region(kvm, mem, user_alloc); |
72dc67a6 | 1291 | up_write(&kvm->slots_lock); |
f78e0e2e SY |
1292 | return r; |
1293 | } | |
210c7c4d IE |
1294 | EXPORT_SYMBOL_GPL(kvm_set_memory_region); |
1295 | ||
1fe779f8 CO |
1296 | int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
1297 | struct | |
1298 | kvm_userspace_memory_region *mem, | |
1299 | int user_alloc) | |
210c7c4d | 1300 | { |
e0d62c7f IE |
1301 | if (mem->slot >= KVM_MEMORY_SLOTS) |
1302 | return -EINVAL; | |
210c7c4d | 1303 | return kvm_set_memory_region(kvm, mem, user_alloc); |
6aa8b732 AK |
1304 | } |
1305 | ||
5bb064dc ZX |
1306 | int kvm_get_dirty_log(struct kvm *kvm, |
1307 | struct kvm_dirty_log *log, int *is_dirty) | |
6aa8b732 AK |
1308 | { |
1309 | struct kvm_memory_slot *memslot; | |
1310 | int r, i; | |
1311 | int n; | |
1312 | unsigned long any = 0; | |
1313 | ||
6aa8b732 AK |
1314 | r = -EINVAL; |
1315 | if (log->slot >= KVM_MEMORY_SLOTS) | |
1316 | goto out; | |
1317 | ||
1318 | memslot = &kvm->memslots[log->slot]; | |
1319 | r = -ENOENT; | |
1320 | if (!memslot->dirty_bitmap) | |
1321 | goto out; | |
1322 | ||
cd1a4a98 | 1323 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
6aa8b732 | 1324 | |
cd1a4a98 | 1325 | for (i = 0; !any && i < n/sizeof(long); ++i) |
6aa8b732 AK |
1326 | any = memslot->dirty_bitmap[i]; |
1327 | ||
1328 | r = -EFAULT; | |
1329 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
1330 | goto out; | |
1331 | ||
5bb064dc ZX |
1332 | if (any) |
1333 | *is_dirty = 1; | |
6aa8b732 AK |
1334 | |
1335 | r = 0; | |
6aa8b732 | 1336 | out: |
6aa8b732 AK |
1337 | return r; |
1338 | } | |
1339 | ||
54dee993 MT |
1340 | void kvm_disable_largepages(void) |
1341 | { | |
1342 | largepages_enabled = false; | |
1343 | } | |
1344 | EXPORT_SYMBOL_GPL(kvm_disable_largepages); | |
1345 | ||
cea7bb21 IE |
1346 | int is_error_page(struct page *page) |
1347 | { | |
1348 | return page == bad_page; | |
1349 | } | |
1350 | EXPORT_SYMBOL_GPL(is_error_page); | |
1351 | ||
35149e21 AL |
1352 | int is_error_pfn(pfn_t pfn) |
1353 | { | |
1354 | return pfn == bad_pfn; | |
1355 | } | |
1356 | EXPORT_SYMBOL_GPL(is_error_pfn); | |
1357 | ||
f9d46eb0 IE |
1358 | static inline unsigned long bad_hva(void) |
1359 | { | |
1360 | return PAGE_OFFSET; | |
1361 | } | |
1362 | ||
1363 | int kvm_is_error_hva(unsigned long addr) | |
1364 | { | |
1365 | return addr == bad_hva(); | |
1366 | } | |
1367 | EXPORT_SYMBOL_GPL(kvm_is_error_hva); | |
1368 | ||
2843099f | 1369 | struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn) |
6aa8b732 AK |
1370 | { |
1371 | int i; | |
1372 | ||
1373 | for (i = 0; i < kvm->nmemslots; ++i) { | |
1374 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
1375 | ||
1376 | if (gfn >= memslot->base_gfn | |
1377 | && gfn < memslot->base_gfn + memslot->npages) | |
1378 | return memslot; | |
1379 | } | |
8b6d44c7 | 1380 | return NULL; |
6aa8b732 | 1381 | } |
2843099f | 1382 | EXPORT_SYMBOL_GPL(gfn_to_memslot_unaliased); |
e8207547 AK |
1383 | |
1384 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
1385 | { | |
1386 | gfn = unalias_gfn(kvm, gfn); | |
2843099f | 1387 | return gfn_to_memslot_unaliased(kvm, gfn); |
e8207547 | 1388 | } |
6aa8b732 | 1389 | |
e0d62c7f IE |
1390 | int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn) |
1391 | { | |
1392 | int i; | |
1393 | ||
1394 | gfn = unalias_gfn(kvm, gfn); | |
1395 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
1396 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
1397 | ||
1398 | if (gfn >= memslot->base_gfn | |
1399 | && gfn < memslot->base_gfn + memslot->npages) | |
1400 | return 1; | |
1401 | } | |
1402 | return 0; | |
1403 | } | |
1404 | EXPORT_SYMBOL_GPL(kvm_is_visible_gfn); | |
1405 | ||
05da4558 | 1406 | unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn) |
539cb660 IE |
1407 | { |
1408 | struct kvm_memory_slot *slot; | |
1409 | ||
1410 | gfn = unalias_gfn(kvm, gfn); | |
2843099f | 1411 | slot = gfn_to_memslot_unaliased(kvm, gfn); |
539cb660 IE |
1412 | if (!slot) |
1413 | return bad_hva(); | |
1414 | return (slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE); | |
1415 | } | |
0d150298 | 1416 | EXPORT_SYMBOL_GPL(gfn_to_hva); |
539cb660 | 1417 | |
35149e21 | 1418 | pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn) |
954bbbc2 | 1419 | { |
8d4e1288 | 1420 | struct page *page[1]; |
539cb660 | 1421 | unsigned long addr; |
8d4e1288 | 1422 | int npages; |
2e2e3738 | 1423 | pfn_t pfn; |
954bbbc2 | 1424 | |
60395224 AK |
1425 | might_sleep(); |
1426 | ||
539cb660 IE |
1427 | addr = gfn_to_hva(kvm, gfn); |
1428 | if (kvm_is_error_hva(addr)) { | |
8a7ae055 | 1429 | get_page(bad_page); |
35149e21 | 1430 | return page_to_pfn(bad_page); |
8a7ae055 | 1431 | } |
8d4e1288 | 1432 | |
4c2155ce | 1433 | npages = get_user_pages_fast(addr, 1, 1, page); |
539cb660 | 1434 | |
2e2e3738 AL |
1435 | if (unlikely(npages != 1)) { |
1436 | struct vm_area_struct *vma; | |
1437 | ||
4c2155ce | 1438 | down_read(¤t->mm->mmap_sem); |
2e2e3738 | 1439 | vma = find_vma(current->mm, addr); |
4c2155ce | 1440 | |
2e2e3738 AL |
1441 | if (vma == NULL || addr < vma->vm_start || |
1442 | !(vma->vm_flags & VM_PFNMAP)) { | |
4c2155ce | 1443 | up_read(¤t->mm->mmap_sem); |
2e2e3738 AL |
1444 | get_page(bad_page); |
1445 | return page_to_pfn(bad_page); | |
1446 | } | |
1447 | ||
1448 | pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; | |
4c2155ce | 1449 | up_read(¤t->mm->mmap_sem); |
c77fb9dc | 1450 | BUG_ON(!kvm_is_mmio_pfn(pfn)); |
2e2e3738 AL |
1451 | } else |
1452 | pfn = page_to_pfn(page[0]); | |
8d4e1288 | 1453 | |
2e2e3738 | 1454 | return pfn; |
35149e21 AL |
1455 | } |
1456 | ||
1457 | EXPORT_SYMBOL_GPL(gfn_to_pfn); | |
1458 | ||
1459 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) | |
1460 | { | |
2e2e3738 AL |
1461 | pfn_t pfn; |
1462 | ||
1463 | pfn = gfn_to_pfn(kvm, gfn); | |
c77fb9dc | 1464 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 AL |
1465 | return pfn_to_page(pfn); |
1466 | ||
c77fb9dc | 1467 | WARN_ON(kvm_is_mmio_pfn(pfn)); |
2e2e3738 AL |
1468 | |
1469 | get_page(bad_page); | |
1470 | return bad_page; | |
954bbbc2 | 1471 | } |
aab61cc0 | 1472 | |
954bbbc2 AK |
1473 | EXPORT_SYMBOL_GPL(gfn_to_page); |
1474 | ||
b4231d61 IE |
1475 | void kvm_release_page_clean(struct page *page) |
1476 | { | |
35149e21 | 1477 | kvm_release_pfn_clean(page_to_pfn(page)); |
b4231d61 IE |
1478 | } |
1479 | EXPORT_SYMBOL_GPL(kvm_release_page_clean); | |
1480 | ||
35149e21 AL |
1481 | void kvm_release_pfn_clean(pfn_t pfn) |
1482 | { | |
c77fb9dc | 1483 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 | 1484 | put_page(pfn_to_page(pfn)); |
35149e21 AL |
1485 | } |
1486 | EXPORT_SYMBOL_GPL(kvm_release_pfn_clean); | |
1487 | ||
b4231d61 | 1488 | void kvm_release_page_dirty(struct page *page) |
8a7ae055 | 1489 | { |
35149e21 AL |
1490 | kvm_release_pfn_dirty(page_to_pfn(page)); |
1491 | } | |
1492 | EXPORT_SYMBOL_GPL(kvm_release_page_dirty); | |
1493 | ||
1494 | void kvm_release_pfn_dirty(pfn_t pfn) | |
1495 | { | |
1496 | kvm_set_pfn_dirty(pfn); | |
1497 | kvm_release_pfn_clean(pfn); | |
1498 | } | |
1499 | EXPORT_SYMBOL_GPL(kvm_release_pfn_dirty); | |
1500 | ||
1501 | void kvm_set_page_dirty(struct page *page) | |
1502 | { | |
1503 | kvm_set_pfn_dirty(page_to_pfn(page)); | |
1504 | } | |
1505 | EXPORT_SYMBOL_GPL(kvm_set_page_dirty); | |
1506 | ||
1507 | void kvm_set_pfn_dirty(pfn_t pfn) | |
1508 | { | |
c77fb9dc | 1509 | if (!kvm_is_mmio_pfn(pfn)) { |
2e2e3738 AL |
1510 | struct page *page = pfn_to_page(pfn); |
1511 | if (!PageReserved(page)) | |
1512 | SetPageDirty(page); | |
1513 | } | |
8a7ae055 | 1514 | } |
35149e21 AL |
1515 | EXPORT_SYMBOL_GPL(kvm_set_pfn_dirty); |
1516 | ||
1517 | void kvm_set_pfn_accessed(pfn_t pfn) | |
1518 | { | |
c77fb9dc | 1519 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 | 1520 | mark_page_accessed(pfn_to_page(pfn)); |
35149e21 AL |
1521 | } |
1522 | EXPORT_SYMBOL_GPL(kvm_set_pfn_accessed); | |
1523 | ||
1524 | void kvm_get_pfn(pfn_t pfn) | |
1525 | { | |
c77fb9dc | 1526 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 | 1527 | get_page(pfn_to_page(pfn)); |
35149e21 AL |
1528 | } |
1529 | EXPORT_SYMBOL_GPL(kvm_get_pfn); | |
8a7ae055 | 1530 | |
195aefde IE |
1531 | static int next_segment(unsigned long len, int offset) |
1532 | { | |
1533 | if (len > PAGE_SIZE - offset) | |
1534 | return PAGE_SIZE - offset; | |
1535 | else | |
1536 | return len; | |
1537 | } | |
1538 | ||
1539 | int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, | |
1540 | int len) | |
1541 | { | |
e0506bcb IE |
1542 | int r; |
1543 | unsigned long addr; | |
195aefde | 1544 | |
e0506bcb IE |
1545 | addr = gfn_to_hva(kvm, gfn); |
1546 | if (kvm_is_error_hva(addr)) | |
1547 | return -EFAULT; | |
1548 | r = copy_from_user(data, (void __user *)addr + offset, len); | |
1549 | if (r) | |
195aefde | 1550 | return -EFAULT; |
195aefde IE |
1551 | return 0; |
1552 | } | |
1553 | EXPORT_SYMBOL_GPL(kvm_read_guest_page); | |
1554 | ||
1555 | int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len) | |
1556 | { | |
1557 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1558 | int seg; | |
1559 | int offset = offset_in_page(gpa); | |
1560 | int ret; | |
1561 | ||
1562 | while ((seg = next_segment(len, offset)) != 0) { | |
1563 | ret = kvm_read_guest_page(kvm, gfn, data, offset, seg); | |
1564 | if (ret < 0) | |
1565 | return ret; | |
1566 | offset = 0; | |
1567 | len -= seg; | |
1568 | data += seg; | |
1569 | ++gfn; | |
1570 | } | |
1571 | return 0; | |
1572 | } | |
1573 | EXPORT_SYMBOL_GPL(kvm_read_guest); | |
1574 | ||
7ec54588 MT |
1575 | int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, |
1576 | unsigned long len) | |
1577 | { | |
1578 | int r; | |
1579 | unsigned long addr; | |
1580 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1581 | int offset = offset_in_page(gpa); | |
1582 | ||
1583 | addr = gfn_to_hva(kvm, gfn); | |
1584 | if (kvm_is_error_hva(addr)) | |
1585 | return -EFAULT; | |
0aac03f0 | 1586 | pagefault_disable(); |
7ec54588 | 1587 | r = __copy_from_user_inatomic(data, (void __user *)addr + offset, len); |
0aac03f0 | 1588 | pagefault_enable(); |
7ec54588 MT |
1589 | if (r) |
1590 | return -EFAULT; | |
1591 | return 0; | |
1592 | } | |
1593 | EXPORT_SYMBOL(kvm_read_guest_atomic); | |
1594 | ||
195aefde IE |
1595 | int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, |
1596 | int offset, int len) | |
1597 | { | |
e0506bcb IE |
1598 | int r; |
1599 | unsigned long addr; | |
195aefde | 1600 | |
e0506bcb IE |
1601 | addr = gfn_to_hva(kvm, gfn); |
1602 | if (kvm_is_error_hva(addr)) | |
1603 | return -EFAULT; | |
1604 | r = copy_to_user((void __user *)addr + offset, data, len); | |
1605 | if (r) | |
195aefde | 1606 | return -EFAULT; |
195aefde IE |
1607 | mark_page_dirty(kvm, gfn); |
1608 | return 0; | |
1609 | } | |
1610 | EXPORT_SYMBOL_GPL(kvm_write_guest_page); | |
1611 | ||
1612 | int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, | |
1613 | unsigned long len) | |
1614 | { | |
1615 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1616 | int seg; | |
1617 | int offset = offset_in_page(gpa); | |
1618 | int ret; | |
1619 | ||
1620 | while ((seg = next_segment(len, offset)) != 0) { | |
1621 | ret = kvm_write_guest_page(kvm, gfn, data, offset, seg); | |
1622 | if (ret < 0) | |
1623 | return ret; | |
1624 | offset = 0; | |
1625 | len -= seg; | |
1626 | data += seg; | |
1627 | ++gfn; | |
1628 | } | |
1629 | return 0; | |
1630 | } | |
1631 | ||
1632 | int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len) | |
1633 | { | |
3e021bf5 | 1634 | return kvm_write_guest_page(kvm, gfn, empty_zero_page, offset, len); |
195aefde IE |
1635 | } |
1636 | EXPORT_SYMBOL_GPL(kvm_clear_guest_page); | |
1637 | ||
1638 | int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len) | |
1639 | { | |
1640 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1641 | int seg; | |
1642 | int offset = offset_in_page(gpa); | |
1643 | int ret; | |
1644 | ||
1645 | while ((seg = next_segment(len, offset)) != 0) { | |
1646 | ret = kvm_clear_guest_page(kvm, gfn, offset, seg); | |
1647 | if (ret < 0) | |
1648 | return ret; | |
1649 | offset = 0; | |
1650 | len -= seg; | |
1651 | ++gfn; | |
1652 | } | |
1653 | return 0; | |
1654 | } | |
1655 | EXPORT_SYMBOL_GPL(kvm_clear_guest); | |
1656 | ||
6aa8b732 AK |
1657 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
1658 | { | |
31389947 | 1659 | struct kvm_memory_slot *memslot; |
6aa8b732 | 1660 | |
3b6fff19 | 1661 | gfn = unalias_gfn(kvm, gfn); |
2843099f | 1662 | memslot = gfn_to_memslot_unaliased(kvm, gfn); |
7e9d619d RR |
1663 | if (memslot && memslot->dirty_bitmap) { |
1664 | unsigned long rel_gfn = gfn - memslot->base_gfn; | |
6aa8b732 | 1665 | |
7e9d619d RR |
1666 | /* avoid RMW */ |
1667 | if (!test_bit(rel_gfn, memslot->dirty_bitmap)) | |
1668 | set_bit(rel_gfn, memslot->dirty_bitmap); | |
6aa8b732 AK |
1669 | } |
1670 | } | |
1671 | ||
b6958ce4 ED |
1672 | /* |
1673 | * The vCPU has executed a HLT instruction with in-kernel mode enabled. | |
1674 | */ | |
8776e519 | 1675 | void kvm_vcpu_block(struct kvm_vcpu *vcpu) |
d3bef15f | 1676 | { |
e5c239cf MT |
1677 | DEFINE_WAIT(wait); |
1678 | ||
1679 | for (;;) { | |
1680 | prepare_to_wait(&vcpu->wq, &wait, TASK_INTERRUPTIBLE); | |
1681 | ||
a1b37100 | 1682 | if (kvm_arch_vcpu_runnable(vcpu)) { |
d7690175 | 1683 | set_bit(KVM_REQ_UNHALT, &vcpu->requests); |
e5c239cf | 1684 | break; |
d7690175 | 1685 | } |
09cec754 GN |
1686 | if (kvm_cpu_has_pending_timer(vcpu)) |
1687 | break; | |
e5c239cf MT |
1688 | if (signal_pending(current)) |
1689 | break; | |
1690 | ||
b6958ce4 | 1691 | schedule(); |
b6958ce4 | 1692 | } |
d3bef15f | 1693 | |
e5c239cf | 1694 | finish_wait(&vcpu->wq, &wait); |
b6958ce4 ED |
1695 | } |
1696 | ||
6aa8b732 AK |
1697 | void kvm_resched(struct kvm_vcpu *vcpu) |
1698 | { | |
3fca0365 YD |
1699 | if (!need_resched()) |
1700 | return; | |
6aa8b732 | 1701 | cond_resched(); |
6aa8b732 AK |
1702 | } |
1703 | EXPORT_SYMBOL_GPL(kvm_resched); | |
1704 | ||
e4a533a4 | 1705 | static int kvm_vcpu_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
9a2bb7f4 AK |
1706 | { |
1707 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; | |
9a2bb7f4 AK |
1708 | struct page *page; |
1709 | ||
e4a533a4 | 1710 | if (vmf->pgoff == 0) |
039576c0 | 1711 | page = virt_to_page(vcpu->run); |
09566765 | 1712 | #ifdef CONFIG_X86 |
e4a533a4 | 1713 | else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET) |
ad312c7c | 1714 | page = virt_to_page(vcpu->arch.pio_data); |
5f94c174 LV |
1715 | #endif |
1716 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
1717 | else if (vmf->pgoff == KVM_COALESCED_MMIO_PAGE_OFFSET) | |
1718 | page = virt_to_page(vcpu->kvm->coalesced_mmio_ring); | |
09566765 | 1719 | #endif |
039576c0 | 1720 | else |
e4a533a4 | 1721 | return VM_FAULT_SIGBUS; |
9a2bb7f4 | 1722 | get_page(page); |
e4a533a4 | 1723 | vmf->page = page; |
1724 | return 0; | |
9a2bb7f4 AK |
1725 | } |
1726 | ||
f0f37e2f | 1727 | static const struct vm_operations_struct kvm_vcpu_vm_ops = { |
e4a533a4 | 1728 | .fault = kvm_vcpu_fault, |
9a2bb7f4 AK |
1729 | }; |
1730 | ||
1731 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) | |
1732 | { | |
1733 | vma->vm_ops = &kvm_vcpu_vm_ops; | |
1734 | return 0; | |
1735 | } | |
1736 | ||
bccf2150 AK |
1737 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
1738 | { | |
1739 | struct kvm_vcpu *vcpu = filp->private_data; | |
1740 | ||
66c0b394 | 1741 | kvm_put_kvm(vcpu->kvm); |
bccf2150 AK |
1742 | return 0; |
1743 | } | |
1744 | ||
3d3aab1b | 1745 | static struct file_operations kvm_vcpu_fops = { |
bccf2150 AK |
1746 | .release = kvm_vcpu_release, |
1747 | .unlocked_ioctl = kvm_vcpu_ioctl, | |
1748 | .compat_ioctl = kvm_vcpu_ioctl, | |
9a2bb7f4 | 1749 | .mmap = kvm_vcpu_mmap, |
bccf2150 AK |
1750 | }; |
1751 | ||
1752 | /* | |
1753 | * Allocates an inode for the vcpu. | |
1754 | */ | |
1755 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) | |
1756 | { | |
73880c80 | 1757 | return anon_inode_getfd("kvm-vcpu", &kvm_vcpu_fops, vcpu, 0); |
bccf2150 AK |
1758 | } |
1759 | ||
c5ea7660 AK |
1760 | /* |
1761 | * Creates some virtual cpus. Good luck creating more than one. | |
1762 | */ | |
73880c80 | 1763 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id) |
c5ea7660 AK |
1764 | { |
1765 | int r; | |
988a2cae | 1766 | struct kvm_vcpu *vcpu, *v; |
c5ea7660 | 1767 | |
73880c80 | 1768 | vcpu = kvm_arch_vcpu_create(kvm, id); |
fb3f0f51 RR |
1769 | if (IS_ERR(vcpu)) |
1770 | return PTR_ERR(vcpu); | |
c5ea7660 | 1771 | |
15ad7146 AK |
1772 | preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops); |
1773 | ||
26e5215f AK |
1774 | r = kvm_arch_vcpu_setup(vcpu); |
1775 | if (r) | |
7d8fece6 | 1776 | return r; |
26e5215f | 1777 | |
11ec2804 | 1778 | mutex_lock(&kvm->lock); |
73880c80 GN |
1779 | if (atomic_read(&kvm->online_vcpus) == KVM_MAX_VCPUS) { |
1780 | r = -EINVAL; | |
e9b11c17 | 1781 | goto vcpu_destroy; |
fb3f0f51 | 1782 | } |
73880c80 | 1783 | |
988a2cae GN |
1784 | kvm_for_each_vcpu(r, v, kvm) |
1785 | if (v->vcpu_id == id) { | |
73880c80 GN |
1786 | r = -EEXIST; |
1787 | goto vcpu_destroy; | |
1788 | } | |
1789 | ||
1790 | BUG_ON(kvm->vcpus[atomic_read(&kvm->online_vcpus)]); | |
c5ea7660 | 1791 | |
fb3f0f51 | 1792 | /* Now it's all set up, let userspace reach it */ |
66c0b394 | 1793 | kvm_get_kvm(kvm); |
bccf2150 | 1794 | r = create_vcpu_fd(vcpu); |
73880c80 GN |
1795 | if (r < 0) { |
1796 | kvm_put_kvm(kvm); | |
1797 | goto vcpu_destroy; | |
1798 | } | |
1799 | ||
1800 | kvm->vcpus[atomic_read(&kvm->online_vcpus)] = vcpu; | |
1801 | smp_wmb(); | |
1802 | atomic_inc(&kvm->online_vcpus); | |
1803 | ||
1804 | #ifdef CONFIG_KVM_APIC_ARCHITECTURE | |
1805 | if (kvm->bsp_vcpu_id == id) | |
1806 | kvm->bsp_vcpu = vcpu; | |
1807 | #endif | |
1808 | mutex_unlock(&kvm->lock); | |
fb3f0f51 | 1809 | return r; |
39c3b86e | 1810 | |
e9b11c17 | 1811 | vcpu_destroy: |
7d8fece6 | 1812 | mutex_unlock(&kvm->lock); |
d40ccc62 | 1813 | kvm_arch_vcpu_destroy(vcpu); |
c5ea7660 AK |
1814 | return r; |
1815 | } | |
1816 | ||
1961d276 AK |
1817 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
1818 | { | |
1819 | if (sigset) { | |
1820 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1821 | vcpu->sigset_active = 1; | |
1822 | vcpu->sigset = *sigset; | |
1823 | } else | |
1824 | vcpu->sigset_active = 0; | |
1825 | return 0; | |
1826 | } | |
1827 | ||
c1e01514 SY |
1828 | #ifdef __KVM_HAVE_MSIX |
1829 | static int kvm_vm_ioctl_set_msix_nr(struct kvm *kvm, | |
1830 | struct kvm_assigned_msix_nr *entry_nr) | |
1831 | { | |
1832 | int r = 0; | |
1833 | struct kvm_assigned_dev_kernel *adev; | |
1834 | ||
1835 | mutex_lock(&kvm->lock); | |
1836 | ||
1837 | adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
1838 | entry_nr->assigned_dev_id); | |
1839 | if (!adev) { | |
1840 | r = -EINVAL; | |
1841 | goto msix_nr_out; | |
1842 | } | |
1843 | ||
1844 | if (adev->entries_nr == 0) { | |
1845 | adev->entries_nr = entry_nr->entry_nr; | |
1846 | if (adev->entries_nr == 0 || | |
1847 | adev->entries_nr >= KVM_MAX_MSIX_PER_DEV) { | |
1848 | r = -EINVAL; | |
1849 | goto msix_nr_out; | |
1850 | } | |
1851 | ||
1852 | adev->host_msix_entries = kzalloc(sizeof(struct msix_entry) * | |
1853 | entry_nr->entry_nr, | |
1854 | GFP_KERNEL); | |
1855 | if (!adev->host_msix_entries) { | |
1856 | r = -ENOMEM; | |
1857 | goto msix_nr_out; | |
1858 | } | |
1859 | adev->guest_msix_entries = kzalloc( | |
1860 | sizeof(struct kvm_guest_msix_entry) * | |
1861 | entry_nr->entry_nr, GFP_KERNEL); | |
1862 | if (!adev->guest_msix_entries) { | |
1863 | kfree(adev->host_msix_entries); | |
1864 | r = -ENOMEM; | |
1865 | goto msix_nr_out; | |
1866 | } | |
1867 | } else /* Not allowed set MSI-X number twice */ | |
1868 | r = -EINVAL; | |
1869 | msix_nr_out: | |
1870 | mutex_unlock(&kvm->lock); | |
1871 | return r; | |
1872 | } | |
1873 | ||
1874 | static int kvm_vm_ioctl_set_msix_entry(struct kvm *kvm, | |
1875 | struct kvm_assigned_msix_entry *entry) | |
1876 | { | |
1877 | int r = 0, i; | |
1878 | struct kvm_assigned_dev_kernel *adev; | |
1879 | ||
1880 | mutex_lock(&kvm->lock); | |
1881 | ||
1882 | adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
1883 | entry->assigned_dev_id); | |
1884 | ||
1885 | if (!adev) { | |
1886 | r = -EINVAL; | |
1887 | goto msix_entry_out; | |
1888 | } | |
1889 | ||
1890 | for (i = 0; i < adev->entries_nr; i++) | |
1891 | if (adev->guest_msix_entries[i].vector == 0 || | |
1892 | adev->guest_msix_entries[i].entry == entry->entry) { | |
1893 | adev->guest_msix_entries[i].entry = entry->entry; | |
1894 | adev->guest_msix_entries[i].vector = entry->gsi; | |
1895 | adev->host_msix_entries[i].entry = entry->entry; | |
1896 | break; | |
1897 | } | |
1898 | if (i == adev->entries_nr) { | |
1899 | r = -ENOSPC; | |
1900 | goto msix_entry_out; | |
1901 | } | |
1902 | ||
1903 | msix_entry_out: | |
1904 | mutex_unlock(&kvm->lock); | |
1905 | ||
1906 | return r; | |
1907 | } | |
1908 | #endif | |
1909 | ||
bccf2150 AK |
1910 | static long kvm_vcpu_ioctl(struct file *filp, |
1911 | unsigned int ioctl, unsigned long arg) | |
6aa8b732 | 1912 | { |
bccf2150 | 1913 | struct kvm_vcpu *vcpu = filp->private_data; |
2f366987 | 1914 | void __user *argp = (void __user *)arg; |
313a3dc7 | 1915 | int r; |
fa3795a7 DH |
1916 | struct kvm_fpu *fpu = NULL; |
1917 | struct kvm_sregs *kvm_sregs = NULL; | |
6aa8b732 | 1918 | |
6d4e4c4f AK |
1919 | if (vcpu->kvm->mm != current->mm) |
1920 | return -EIO; | |
6aa8b732 | 1921 | switch (ioctl) { |
9a2bb7f4 | 1922 | case KVM_RUN: |
f0fe5108 AK |
1923 | r = -EINVAL; |
1924 | if (arg) | |
1925 | goto out; | |
b6c7a5dc | 1926 | r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run); |
6aa8b732 | 1927 | break; |
6aa8b732 | 1928 | case KVM_GET_REGS: { |
3e4bb3ac | 1929 | struct kvm_regs *kvm_regs; |
6aa8b732 | 1930 | |
3e4bb3ac XZ |
1931 | r = -ENOMEM; |
1932 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); | |
1933 | if (!kvm_regs) | |
6aa8b732 | 1934 | goto out; |
3e4bb3ac XZ |
1935 | r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs); |
1936 | if (r) | |
1937 | goto out_free1; | |
6aa8b732 | 1938 | r = -EFAULT; |
3e4bb3ac XZ |
1939 | if (copy_to_user(argp, kvm_regs, sizeof(struct kvm_regs))) |
1940 | goto out_free1; | |
6aa8b732 | 1941 | r = 0; |
3e4bb3ac XZ |
1942 | out_free1: |
1943 | kfree(kvm_regs); | |
6aa8b732 AK |
1944 | break; |
1945 | } | |
1946 | case KVM_SET_REGS: { | |
3e4bb3ac | 1947 | struct kvm_regs *kvm_regs; |
6aa8b732 | 1948 | |
3e4bb3ac XZ |
1949 | r = -ENOMEM; |
1950 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); | |
1951 | if (!kvm_regs) | |
6aa8b732 | 1952 | goto out; |
3e4bb3ac XZ |
1953 | r = -EFAULT; |
1954 | if (copy_from_user(kvm_regs, argp, sizeof(struct kvm_regs))) | |
1955 | goto out_free2; | |
1956 | r = kvm_arch_vcpu_ioctl_set_regs(vcpu, kvm_regs); | |
6aa8b732 | 1957 | if (r) |
3e4bb3ac | 1958 | goto out_free2; |
6aa8b732 | 1959 | r = 0; |
3e4bb3ac XZ |
1960 | out_free2: |
1961 | kfree(kvm_regs); | |
6aa8b732 AK |
1962 | break; |
1963 | } | |
1964 | case KVM_GET_SREGS: { | |
fa3795a7 DH |
1965 | kvm_sregs = kzalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
1966 | r = -ENOMEM; | |
1967 | if (!kvm_sregs) | |
1968 | goto out; | |
1969 | r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs); | |
6aa8b732 AK |
1970 | if (r) |
1971 | goto out; | |
1972 | r = -EFAULT; | |
fa3795a7 | 1973 | if (copy_to_user(argp, kvm_sregs, sizeof(struct kvm_sregs))) |
6aa8b732 AK |
1974 | goto out; |
1975 | r = 0; | |
1976 | break; | |
1977 | } | |
1978 | case KVM_SET_SREGS: { | |
fa3795a7 DH |
1979 | kvm_sregs = kmalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
1980 | r = -ENOMEM; | |
1981 | if (!kvm_sregs) | |
1982 | goto out; | |
6aa8b732 | 1983 | r = -EFAULT; |
fa3795a7 | 1984 | if (copy_from_user(kvm_sregs, argp, sizeof(struct kvm_sregs))) |
6aa8b732 | 1985 | goto out; |
fa3795a7 | 1986 | r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs); |
6aa8b732 AK |
1987 | if (r) |
1988 | goto out; | |
1989 | r = 0; | |
1990 | break; | |
1991 | } | |
62d9f0db MT |
1992 | case KVM_GET_MP_STATE: { |
1993 | struct kvm_mp_state mp_state; | |
1994 | ||
1995 | r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state); | |
1996 | if (r) | |
1997 | goto out; | |
1998 | r = -EFAULT; | |
1999 | if (copy_to_user(argp, &mp_state, sizeof mp_state)) | |
2000 | goto out; | |
2001 | r = 0; | |
2002 | break; | |
2003 | } | |
2004 | case KVM_SET_MP_STATE: { | |
2005 | struct kvm_mp_state mp_state; | |
2006 | ||
2007 | r = -EFAULT; | |
2008 | if (copy_from_user(&mp_state, argp, sizeof mp_state)) | |
2009 | goto out; | |
2010 | r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state); | |
2011 | if (r) | |
2012 | goto out; | |
2013 | r = 0; | |
2014 | break; | |
2015 | } | |
6aa8b732 AK |
2016 | case KVM_TRANSLATE: { |
2017 | struct kvm_translation tr; | |
2018 | ||
2019 | r = -EFAULT; | |
2f366987 | 2020 | if (copy_from_user(&tr, argp, sizeof tr)) |
6aa8b732 | 2021 | goto out; |
8b006791 | 2022 | r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr); |
6aa8b732 AK |
2023 | if (r) |
2024 | goto out; | |
2025 | r = -EFAULT; | |
2f366987 | 2026 | if (copy_to_user(argp, &tr, sizeof tr)) |
6aa8b732 AK |
2027 | goto out; |
2028 | r = 0; | |
2029 | break; | |
2030 | } | |
d0bfb940 JK |
2031 | case KVM_SET_GUEST_DEBUG: { |
2032 | struct kvm_guest_debug dbg; | |
6aa8b732 AK |
2033 | |
2034 | r = -EFAULT; | |
2f366987 | 2035 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
6aa8b732 | 2036 | goto out; |
d0bfb940 | 2037 | r = kvm_arch_vcpu_ioctl_set_guest_debug(vcpu, &dbg); |
6aa8b732 AK |
2038 | if (r) |
2039 | goto out; | |
2040 | r = 0; | |
2041 | break; | |
2042 | } | |
1961d276 AK |
2043 | case KVM_SET_SIGNAL_MASK: { |
2044 | struct kvm_signal_mask __user *sigmask_arg = argp; | |
2045 | struct kvm_signal_mask kvm_sigmask; | |
2046 | sigset_t sigset, *p; | |
2047 | ||
2048 | p = NULL; | |
2049 | if (argp) { | |
2050 | r = -EFAULT; | |
2051 | if (copy_from_user(&kvm_sigmask, argp, | |
2052 | sizeof kvm_sigmask)) | |
2053 | goto out; | |
2054 | r = -EINVAL; | |
2055 | if (kvm_sigmask.len != sizeof sigset) | |
2056 | goto out; | |
2057 | r = -EFAULT; | |
2058 | if (copy_from_user(&sigset, sigmask_arg->sigset, | |
2059 | sizeof sigset)) | |
2060 | goto out; | |
2061 | p = &sigset; | |
2062 | } | |
2063 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); | |
2064 | break; | |
2065 | } | |
b8836737 | 2066 | case KVM_GET_FPU: { |
fa3795a7 DH |
2067 | fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
2068 | r = -ENOMEM; | |
2069 | if (!fpu) | |
2070 | goto out; | |
2071 | r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, fpu); | |
b8836737 AK |
2072 | if (r) |
2073 | goto out; | |
2074 | r = -EFAULT; | |
fa3795a7 | 2075 | if (copy_to_user(argp, fpu, sizeof(struct kvm_fpu))) |
b8836737 AK |
2076 | goto out; |
2077 | r = 0; | |
2078 | break; | |
2079 | } | |
2080 | case KVM_SET_FPU: { | |
fa3795a7 DH |
2081 | fpu = kmalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
2082 | r = -ENOMEM; | |
2083 | if (!fpu) | |
2084 | goto out; | |
b8836737 | 2085 | r = -EFAULT; |
fa3795a7 | 2086 | if (copy_from_user(fpu, argp, sizeof(struct kvm_fpu))) |
b8836737 | 2087 | goto out; |
fa3795a7 | 2088 | r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu); |
b8836737 AK |
2089 | if (r) |
2090 | goto out; | |
2091 | r = 0; | |
2092 | break; | |
2093 | } | |
bccf2150 | 2094 | default: |
313a3dc7 | 2095 | r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
bccf2150 AK |
2096 | } |
2097 | out: | |
fa3795a7 DH |
2098 | kfree(fpu); |
2099 | kfree(kvm_sregs); | |
bccf2150 AK |
2100 | return r; |
2101 | } | |
2102 | ||
2103 | static long kvm_vm_ioctl(struct file *filp, | |
2104 | unsigned int ioctl, unsigned long arg) | |
2105 | { | |
2106 | struct kvm *kvm = filp->private_data; | |
2107 | void __user *argp = (void __user *)arg; | |
1fe779f8 | 2108 | int r; |
bccf2150 | 2109 | |
6d4e4c4f AK |
2110 | if (kvm->mm != current->mm) |
2111 | return -EIO; | |
bccf2150 AK |
2112 | switch (ioctl) { |
2113 | case KVM_CREATE_VCPU: | |
2114 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); | |
2115 | if (r < 0) | |
2116 | goto out; | |
2117 | break; | |
6fc138d2 IE |
2118 | case KVM_SET_USER_MEMORY_REGION: { |
2119 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
2120 | ||
2121 | r = -EFAULT; | |
2122 | if (copy_from_user(&kvm_userspace_mem, argp, | |
2123 | sizeof kvm_userspace_mem)) | |
2124 | goto out; | |
2125 | ||
2126 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1); | |
6aa8b732 AK |
2127 | if (r) |
2128 | goto out; | |
2129 | break; | |
2130 | } | |
2131 | case KVM_GET_DIRTY_LOG: { | |
2132 | struct kvm_dirty_log log; | |
2133 | ||
2134 | r = -EFAULT; | |
2f366987 | 2135 | if (copy_from_user(&log, argp, sizeof log)) |
6aa8b732 | 2136 | goto out; |
2c6f5df9 | 2137 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
6aa8b732 AK |
2138 | if (r) |
2139 | goto out; | |
2140 | break; | |
2141 | } | |
5f94c174 LV |
2142 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
2143 | case KVM_REGISTER_COALESCED_MMIO: { | |
2144 | struct kvm_coalesced_mmio_zone zone; | |
2145 | r = -EFAULT; | |
2146 | if (copy_from_user(&zone, argp, sizeof zone)) | |
2147 | goto out; | |
2148 | r = -ENXIO; | |
2149 | r = kvm_vm_ioctl_register_coalesced_mmio(kvm, &zone); | |
2150 | if (r) | |
2151 | goto out; | |
2152 | r = 0; | |
2153 | break; | |
2154 | } | |
2155 | case KVM_UNREGISTER_COALESCED_MMIO: { | |
2156 | struct kvm_coalesced_mmio_zone zone; | |
2157 | r = -EFAULT; | |
2158 | if (copy_from_user(&zone, argp, sizeof zone)) | |
2159 | goto out; | |
2160 | r = -ENXIO; | |
2161 | r = kvm_vm_ioctl_unregister_coalesced_mmio(kvm, &zone); | |
2162 | if (r) | |
2163 | goto out; | |
2164 | r = 0; | |
2165 | break; | |
2166 | } | |
8a98f664 XZ |
2167 | #endif |
2168 | #ifdef KVM_CAP_DEVICE_ASSIGNMENT | |
2169 | case KVM_ASSIGN_PCI_DEVICE: { | |
2170 | struct kvm_assigned_pci_dev assigned_dev; | |
2171 | ||
2172 | r = -EFAULT; | |
2173 | if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev)) | |
2174 | goto out; | |
2175 | r = kvm_vm_ioctl_assign_device(kvm, &assigned_dev); | |
2176 | if (r) | |
2177 | goto out; | |
2178 | break; | |
2179 | } | |
2180 | case KVM_ASSIGN_IRQ: { | |
e56d532f SY |
2181 | r = -EOPNOTSUPP; |
2182 | break; | |
2183 | } | |
2184 | #ifdef KVM_CAP_ASSIGN_DEV_IRQ | |
2185 | case KVM_ASSIGN_DEV_IRQ: { | |
8a98f664 XZ |
2186 | struct kvm_assigned_irq assigned_irq; |
2187 | ||
2188 | r = -EFAULT; | |
2189 | if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq)) | |
2190 | goto out; | |
2191 | r = kvm_vm_ioctl_assign_irq(kvm, &assigned_irq); | |
2192 | if (r) | |
2193 | goto out; | |
2194 | break; | |
2195 | } | |
e56d532f SY |
2196 | case KVM_DEASSIGN_DEV_IRQ: { |
2197 | struct kvm_assigned_irq assigned_irq; | |
2198 | ||
2199 | r = -EFAULT; | |
2200 | if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq)) | |
2201 | goto out; | |
2202 | r = kvm_vm_ioctl_deassign_dev_irq(kvm, &assigned_irq); | |
2203 | if (r) | |
2204 | goto out; | |
2205 | break; | |
2206 | } | |
2207 | #endif | |
0a920356 WH |
2208 | #endif |
2209 | #ifdef KVM_CAP_DEVICE_DEASSIGNMENT | |
2210 | case KVM_DEASSIGN_PCI_DEVICE: { | |
2211 | struct kvm_assigned_pci_dev assigned_dev; | |
2212 | ||
2213 | r = -EFAULT; | |
2214 | if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev)) | |
2215 | goto out; | |
2216 | r = kvm_vm_ioctl_deassign_device(kvm, &assigned_dev); | |
2217 | if (r) | |
2218 | goto out; | |
2219 | break; | |
2220 | } | |
399ec807 AK |
2221 | #endif |
2222 | #ifdef KVM_CAP_IRQ_ROUTING | |
2223 | case KVM_SET_GSI_ROUTING: { | |
2224 | struct kvm_irq_routing routing; | |
2225 | struct kvm_irq_routing __user *urouting; | |
2226 | struct kvm_irq_routing_entry *entries; | |
2227 | ||
2228 | r = -EFAULT; | |
2229 | if (copy_from_user(&routing, argp, sizeof(routing))) | |
2230 | goto out; | |
2231 | r = -EINVAL; | |
2232 | if (routing.nr >= KVM_MAX_IRQ_ROUTES) | |
2233 | goto out; | |
2234 | if (routing.flags) | |
2235 | goto out; | |
2236 | r = -ENOMEM; | |
2237 | entries = vmalloc(routing.nr * sizeof(*entries)); | |
2238 | if (!entries) | |
2239 | goto out; | |
2240 | r = -EFAULT; | |
2241 | urouting = argp; | |
2242 | if (copy_from_user(entries, urouting->entries, | |
2243 | routing.nr * sizeof(*entries))) | |
2244 | goto out_free_irq_routing; | |
2245 | r = kvm_set_irq_routing(kvm, entries, routing.nr, | |
2246 | routing.flags); | |
2247 | out_free_irq_routing: | |
2248 | vfree(entries); | |
2249 | break; | |
2250 | } | |
6621fbc2 | 2251 | #endif /* KVM_CAP_IRQ_ROUTING */ |
c1e01514 SY |
2252 | #ifdef __KVM_HAVE_MSIX |
2253 | case KVM_ASSIGN_SET_MSIX_NR: { | |
2254 | struct kvm_assigned_msix_nr entry_nr; | |
2255 | r = -EFAULT; | |
2256 | if (copy_from_user(&entry_nr, argp, sizeof entry_nr)) | |
2257 | goto out; | |
2258 | r = kvm_vm_ioctl_set_msix_nr(kvm, &entry_nr); | |
2259 | if (r) | |
2260 | goto out; | |
2261 | break; | |
2262 | } | |
2263 | case KVM_ASSIGN_SET_MSIX_ENTRY: { | |
2264 | struct kvm_assigned_msix_entry entry; | |
2265 | r = -EFAULT; | |
2266 | if (copy_from_user(&entry, argp, sizeof entry)) | |
2267 | goto out; | |
2268 | r = kvm_vm_ioctl_set_msix_entry(kvm, &entry); | |
2269 | if (r) | |
2270 | goto out; | |
2271 | break; | |
2272 | } | |
5f94c174 | 2273 | #endif |
721eecbf GH |
2274 | case KVM_IRQFD: { |
2275 | struct kvm_irqfd data; | |
2276 | ||
2277 | r = -EFAULT; | |
2278 | if (copy_from_user(&data, argp, sizeof data)) | |
2279 | goto out; | |
2280 | r = kvm_irqfd(kvm, data.fd, data.gsi, data.flags); | |
2281 | break; | |
2282 | } | |
d34e6b17 GH |
2283 | case KVM_IOEVENTFD: { |
2284 | struct kvm_ioeventfd data; | |
2285 | ||
2286 | r = -EFAULT; | |
2287 | if (copy_from_user(&data, argp, sizeof data)) | |
2288 | goto out; | |
2289 | r = kvm_ioeventfd(kvm, &data); | |
2290 | break; | |
2291 | } | |
73880c80 GN |
2292 | #ifdef CONFIG_KVM_APIC_ARCHITECTURE |
2293 | case KVM_SET_BOOT_CPU_ID: | |
2294 | r = 0; | |
894a9c55 | 2295 | mutex_lock(&kvm->lock); |
73880c80 GN |
2296 | if (atomic_read(&kvm->online_vcpus) != 0) |
2297 | r = -EBUSY; | |
2298 | else | |
2299 | kvm->bsp_vcpu_id = arg; | |
894a9c55 | 2300 | mutex_unlock(&kvm->lock); |
73880c80 GN |
2301 | break; |
2302 | #endif | |
f17abe9a | 2303 | default: |
1fe779f8 | 2304 | r = kvm_arch_vm_ioctl(filp, ioctl, arg); |
f17abe9a AK |
2305 | } |
2306 | out: | |
2307 | return r; | |
2308 | } | |
2309 | ||
e4a533a4 | 2310 | static int kvm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
f17abe9a | 2311 | { |
777b3f49 MT |
2312 | struct page *page[1]; |
2313 | unsigned long addr; | |
2314 | int npages; | |
2315 | gfn_t gfn = vmf->pgoff; | |
f17abe9a | 2316 | struct kvm *kvm = vma->vm_file->private_data; |
f17abe9a | 2317 | |
777b3f49 MT |
2318 | addr = gfn_to_hva(kvm, gfn); |
2319 | if (kvm_is_error_hva(addr)) | |
e4a533a4 | 2320 | return VM_FAULT_SIGBUS; |
777b3f49 MT |
2321 | |
2322 | npages = get_user_pages(current, current->mm, addr, 1, 1, 0, page, | |
2323 | NULL); | |
2324 | if (unlikely(npages != 1)) | |
e4a533a4 | 2325 | return VM_FAULT_SIGBUS; |
777b3f49 MT |
2326 | |
2327 | vmf->page = page[0]; | |
e4a533a4 | 2328 | return 0; |
f17abe9a AK |
2329 | } |
2330 | ||
f0f37e2f | 2331 | static const struct vm_operations_struct kvm_vm_vm_ops = { |
e4a533a4 | 2332 | .fault = kvm_vm_fault, |
f17abe9a AK |
2333 | }; |
2334 | ||
2335 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) | |
2336 | { | |
2337 | vma->vm_ops = &kvm_vm_vm_ops; | |
2338 | return 0; | |
2339 | } | |
2340 | ||
3d3aab1b | 2341 | static struct file_operations kvm_vm_fops = { |
f17abe9a AK |
2342 | .release = kvm_vm_release, |
2343 | .unlocked_ioctl = kvm_vm_ioctl, | |
2344 | .compat_ioctl = kvm_vm_ioctl, | |
2345 | .mmap = kvm_vm_mmap, | |
2346 | }; | |
2347 | ||
2348 | static int kvm_dev_ioctl_create_vm(void) | |
2349 | { | |
2030a42c | 2350 | int fd; |
f17abe9a AK |
2351 | struct kvm *kvm; |
2352 | ||
f17abe9a | 2353 | kvm = kvm_create_vm(); |
d6d28168 AK |
2354 | if (IS_ERR(kvm)) |
2355 | return PTR_ERR(kvm); | |
7d9dbca3 | 2356 | fd = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, 0); |
2030a42c | 2357 | if (fd < 0) |
66c0b394 | 2358 | kvm_put_kvm(kvm); |
f17abe9a | 2359 | |
f17abe9a | 2360 | return fd; |
f17abe9a AK |
2361 | } |
2362 | ||
1a811b61 AK |
2363 | static long kvm_dev_ioctl_check_extension_generic(long arg) |
2364 | { | |
2365 | switch (arg) { | |
ca9edaee | 2366 | case KVM_CAP_USER_MEMORY: |
1a811b61 | 2367 | case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: |
4cd481f6 | 2368 | case KVM_CAP_JOIN_MEMORY_REGIONS_WORKS: |
73880c80 GN |
2369 | #ifdef CONFIG_KVM_APIC_ARCHITECTURE |
2370 | case KVM_CAP_SET_BOOT_CPU_ID: | |
2371 | #endif | |
1a811b61 | 2372 | return 1; |
399ec807 AK |
2373 | #ifdef CONFIG_HAVE_KVM_IRQCHIP |
2374 | case KVM_CAP_IRQ_ROUTING: | |
36463146 | 2375 | return KVM_MAX_IRQ_ROUTES; |
399ec807 | 2376 | #endif |
1a811b61 AK |
2377 | default: |
2378 | break; | |
2379 | } | |
2380 | return kvm_dev_ioctl_check_extension(arg); | |
2381 | } | |
2382 | ||
f17abe9a AK |
2383 | static long kvm_dev_ioctl(struct file *filp, |
2384 | unsigned int ioctl, unsigned long arg) | |
2385 | { | |
07c45a36 | 2386 | long r = -EINVAL; |
f17abe9a AK |
2387 | |
2388 | switch (ioctl) { | |
2389 | case KVM_GET_API_VERSION: | |
f0fe5108 AK |
2390 | r = -EINVAL; |
2391 | if (arg) | |
2392 | goto out; | |
f17abe9a AK |
2393 | r = KVM_API_VERSION; |
2394 | break; | |
2395 | case KVM_CREATE_VM: | |
f0fe5108 AK |
2396 | r = -EINVAL; |
2397 | if (arg) | |
2398 | goto out; | |
f17abe9a AK |
2399 | r = kvm_dev_ioctl_create_vm(); |
2400 | break; | |
018d00d2 | 2401 | case KVM_CHECK_EXTENSION: |
1a811b61 | 2402 | r = kvm_dev_ioctl_check_extension_generic(arg); |
5d308f45 | 2403 | break; |
07c45a36 AK |
2404 | case KVM_GET_VCPU_MMAP_SIZE: |
2405 | r = -EINVAL; | |
2406 | if (arg) | |
2407 | goto out; | |
adb1ff46 AK |
2408 | r = PAGE_SIZE; /* struct kvm_run */ |
2409 | #ifdef CONFIG_X86 | |
2410 | r += PAGE_SIZE; /* pio data page */ | |
5f94c174 LV |
2411 | #endif |
2412 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
2413 | r += PAGE_SIZE; /* coalesced mmio ring page */ | |
adb1ff46 | 2414 | #endif |
07c45a36 | 2415 | break; |
d4c9ff2d FEL |
2416 | case KVM_TRACE_ENABLE: |
2417 | case KVM_TRACE_PAUSE: | |
2418 | case KVM_TRACE_DISABLE: | |
2023a29c | 2419 | r = -EOPNOTSUPP; |
d4c9ff2d | 2420 | break; |
6aa8b732 | 2421 | default: |
043405e1 | 2422 | return kvm_arch_dev_ioctl(filp, ioctl, arg); |
6aa8b732 AK |
2423 | } |
2424 | out: | |
2425 | return r; | |
2426 | } | |
2427 | ||
6aa8b732 | 2428 | static struct file_operations kvm_chardev_ops = { |
6aa8b732 AK |
2429 | .unlocked_ioctl = kvm_dev_ioctl, |
2430 | .compat_ioctl = kvm_dev_ioctl, | |
6aa8b732 AK |
2431 | }; |
2432 | ||
2433 | static struct miscdevice kvm_dev = { | |
bbe4432e | 2434 | KVM_MINOR, |
6aa8b732 AK |
2435 | "kvm", |
2436 | &kvm_chardev_ops, | |
2437 | }; | |
2438 | ||
1b6c0168 AK |
2439 | static void hardware_enable(void *junk) |
2440 | { | |
2441 | int cpu = raw_smp_processor_id(); | |
2442 | ||
7f59f492 | 2443 | if (cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
1b6c0168 | 2444 | return; |
7f59f492 | 2445 | cpumask_set_cpu(cpu, cpus_hardware_enabled); |
e9b11c17 | 2446 | kvm_arch_hardware_enable(NULL); |
1b6c0168 AK |
2447 | } |
2448 | ||
2449 | static void hardware_disable(void *junk) | |
2450 | { | |
2451 | int cpu = raw_smp_processor_id(); | |
2452 | ||
7f59f492 | 2453 | if (!cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
1b6c0168 | 2454 | return; |
7f59f492 | 2455 | cpumask_clear_cpu(cpu, cpus_hardware_enabled); |
e9b11c17 | 2456 | kvm_arch_hardware_disable(NULL); |
1b6c0168 AK |
2457 | } |
2458 | ||
774c47f1 AK |
2459 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, |
2460 | void *v) | |
2461 | { | |
2462 | int cpu = (long)v; | |
2463 | ||
1a6f4d7f | 2464 | val &= ~CPU_TASKS_FROZEN; |
774c47f1 | 2465 | switch (val) { |
cec9ad27 | 2466 | case CPU_DYING: |
6ec8a856 AK |
2467 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
2468 | cpu); | |
2469 | hardware_disable(NULL); | |
2470 | break; | |
774c47f1 | 2471 | case CPU_UP_CANCELED: |
43934a38 JK |
2472 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
2473 | cpu); | |
8691e5a8 | 2474 | smp_call_function_single(cpu, hardware_disable, NULL, 1); |
774c47f1 | 2475 | break; |
43934a38 JK |
2476 | case CPU_ONLINE: |
2477 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", | |
2478 | cpu); | |
8691e5a8 | 2479 | smp_call_function_single(cpu, hardware_enable, NULL, 1); |
774c47f1 AK |
2480 | break; |
2481 | } | |
2482 | return NOTIFY_OK; | |
2483 | } | |
2484 | ||
4ecac3fd AK |
2485 | |
2486 | asmlinkage void kvm_handle_fault_on_reboot(void) | |
2487 | { | |
2488 | if (kvm_rebooting) | |
2489 | /* spin while reset goes on */ | |
2490 | while (true) | |
2491 | ; | |
2492 | /* Fault while not rebooting. We want the trace. */ | |
2493 | BUG(); | |
2494 | } | |
2495 | EXPORT_SYMBOL_GPL(kvm_handle_fault_on_reboot); | |
2496 | ||
9a2b85c6 | 2497 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, |
d77c26fc | 2498 | void *v) |
9a2b85c6 | 2499 | { |
8e1c1815 SY |
2500 | /* |
2501 | * Some (well, at least mine) BIOSes hang on reboot if | |
2502 | * in vmx root mode. | |
2503 | * | |
2504 | * And Intel TXT required VMX off for all cpu when system shutdown. | |
2505 | */ | |
2506 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); | |
2507 | kvm_rebooting = true; | |
2508 | on_each_cpu(hardware_disable, NULL, 1); | |
9a2b85c6 RR |
2509 | return NOTIFY_OK; |
2510 | } | |
2511 | ||
2512 | static struct notifier_block kvm_reboot_notifier = { | |
2513 | .notifier_call = kvm_reboot, | |
2514 | .priority = 0, | |
2515 | }; | |
2516 | ||
2eeb2e94 GH |
2517 | void kvm_io_bus_init(struct kvm_io_bus *bus) |
2518 | { | |
2519 | memset(bus, 0, sizeof(*bus)); | |
2520 | } | |
2521 | ||
2522 | void kvm_io_bus_destroy(struct kvm_io_bus *bus) | |
2523 | { | |
2524 | int i; | |
2525 | ||
2526 | for (i = 0; i < bus->dev_count; i++) { | |
2527 | struct kvm_io_device *pos = bus->devs[i]; | |
2528 | ||
2529 | kvm_iodevice_destructor(pos); | |
2530 | } | |
2531 | } | |
2532 | ||
bda9020e MT |
2533 | /* kvm_io_bus_write - called under kvm->slots_lock */ |
2534 | int kvm_io_bus_write(struct kvm_io_bus *bus, gpa_t addr, | |
2535 | int len, const void *val) | |
2eeb2e94 GH |
2536 | { |
2537 | int i; | |
bda9020e MT |
2538 | for (i = 0; i < bus->dev_count; i++) |
2539 | if (!kvm_iodevice_write(bus->devs[i], addr, len, val)) | |
2540 | return 0; | |
2541 | return -EOPNOTSUPP; | |
2542 | } | |
2eeb2e94 | 2543 | |
bda9020e MT |
2544 | /* kvm_io_bus_read - called under kvm->slots_lock */ |
2545 | int kvm_io_bus_read(struct kvm_io_bus *bus, gpa_t addr, int len, void *val) | |
2546 | { | |
2547 | int i; | |
2548 | for (i = 0; i < bus->dev_count; i++) | |
2549 | if (!kvm_iodevice_read(bus->devs[i], addr, len, val)) | |
2550 | return 0; | |
2551 | return -EOPNOTSUPP; | |
2eeb2e94 GH |
2552 | } |
2553 | ||
090b7aff | 2554 | int kvm_io_bus_register_dev(struct kvm *kvm, struct kvm_io_bus *bus, |
6c474694 MT |
2555 | struct kvm_io_device *dev) |
2556 | { | |
090b7aff GH |
2557 | int ret; |
2558 | ||
6c474694 | 2559 | down_write(&kvm->slots_lock); |
090b7aff | 2560 | ret = __kvm_io_bus_register_dev(bus, dev); |
6c474694 | 2561 | up_write(&kvm->slots_lock); |
090b7aff GH |
2562 | |
2563 | return ret; | |
6c474694 MT |
2564 | } |
2565 | ||
2566 | /* An unlocked version. Caller must have write lock on slots_lock. */ | |
090b7aff GH |
2567 | int __kvm_io_bus_register_dev(struct kvm_io_bus *bus, |
2568 | struct kvm_io_device *dev) | |
2eeb2e94 | 2569 | { |
090b7aff GH |
2570 | if (bus->dev_count > NR_IOBUS_DEVS-1) |
2571 | return -ENOSPC; | |
2eeb2e94 GH |
2572 | |
2573 | bus->devs[bus->dev_count++] = dev; | |
090b7aff GH |
2574 | |
2575 | return 0; | |
2576 | } | |
2577 | ||
2578 | void kvm_io_bus_unregister_dev(struct kvm *kvm, | |
2579 | struct kvm_io_bus *bus, | |
2580 | struct kvm_io_device *dev) | |
2581 | { | |
2582 | down_write(&kvm->slots_lock); | |
2583 | __kvm_io_bus_unregister_dev(bus, dev); | |
2584 | up_write(&kvm->slots_lock); | |
2585 | } | |
2586 | ||
2587 | /* An unlocked version. Caller must have write lock on slots_lock. */ | |
2588 | void __kvm_io_bus_unregister_dev(struct kvm_io_bus *bus, | |
2589 | struct kvm_io_device *dev) | |
2590 | { | |
2591 | int i; | |
2592 | ||
2593 | for (i = 0; i < bus->dev_count; i++) | |
2594 | if (bus->devs[i] == dev) { | |
2595 | bus->devs[i] = bus->devs[--bus->dev_count]; | |
2596 | break; | |
2597 | } | |
2eeb2e94 GH |
2598 | } |
2599 | ||
774c47f1 AK |
2600 | static struct notifier_block kvm_cpu_notifier = { |
2601 | .notifier_call = kvm_cpu_hotplug, | |
2602 | .priority = 20, /* must be > scheduler priority */ | |
2603 | }; | |
2604 | ||
8b88b099 | 2605 | static int vm_stat_get(void *_offset, u64 *val) |
ba1389b7 AK |
2606 | { |
2607 | unsigned offset = (long)_offset; | |
ba1389b7 AK |
2608 | struct kvm *kvm; |
2609 | ||
8b88b099 | 2610 | *val = 0; |
ba1389b7 AK |
2611 | spin_lock(&kvm_lock); |
2612 | list_for_each_entry(kvm, &vm_list, vm_list) | |
8b88b099 | 2613 | *val += *(u32 *)((void *)kvm + offset); |
ba1389b7 | 2614 | spin_unlock(&kvm_lock); |
8b88b099 | 2615 | return 0; |
ba1389b7 AK |
2616 | } |
2617 | ||
2618 | DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n"); | |
2619 | ||
8b88b099 | 2620 | static int vcpu_stat_get(void *_offset, u64 *val) |
1165f5fe AK |
2621 | { |
2622 | unsigned offset = (long)_offset; | |
1165f5fe AK |
2623 | struct kvm *kvm; |
2624 | struct kvm_vcpu *vcpu; | |
2625 | int i; | |
2626 | ||
8b88b099 | 2627 | *val = 0; |
1165f5fe AK |
2628 | spin_lock(&kvm_lock); |
2629 | list_for_each_entry(kvm, &vm_list, vm_list) | |
988a2cae GN |
2630 | kvm_for_each_vcpu(i, vcpu, kvm) |
2631 | *val += *(u32 *)((void *)vcpu + offset); | |
2632 | ||
1165f5fe | 2633 | spin_unlock(&kvm_lock); |
8b88b099 | 2634 | return 0; |
1165f5fe AK |
2635 | } |
2636 | ||
ba1389b7 AK |
2637 | DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n"); |
2638 | ||
828c0950 | 2639 | static const struct file_operations *stat_fops[] = { |
ba1389b7 AK |
2640 | [KVM_STAT_VCPU] = &vcpu_stat_fops, |
2641 | [KVM_STAT_VM] = &vm_stat_fops, | |
2642 | }; | |
1165f5fe | 2643 | |
a16b043c | 2644 | static void kvm_init_debug(void) |
6aa8b732 AK |
2645 | { |
2646 | struct kvm_stats_debugfs_item *p; | |
2647 | ||
76f7c879 | 2648 | kvm_debugfs_dir = debugfs_create_dir("kvm", NULL); |
6aa8b732 | 2649 | for (p = debugfs_entries; p->name; ++p) |
76f7c879 | 2650 | p->dentry = debugfs_create_file(p->name, 0444, kvm_debugfs_dir, |
1165f5fe | 2651 | (void *)(long)p->offset, |
ba1389b7 | 2652 | stat_fops[p->kind]); |
6aa8b732 AK |
2653 | } |
2654 | ||
2655 | static void kvm_exit_debug(void) | |
2656 | { | |
2657 | struct kvm_stats_debugfs_item *p; | |
2658 | ||
2659 | for (p = debugfs_entries; p->name; ++p) | |
2660 | debugfs_remove(p->dentry); | |
76f7c879 | 2661 | debugfs_remove(kvm_debugfs_dir); |
6aa8b732 AK |
2662 | } |
2663 | ||
59ae6c6b AK |
2664 | static int kvm_suspend(struct sys_device *dev, pm_message_t state) |
2665 | { | |
4267c41a | 2666 | hardware_disable(NULL); |
59ae6c6b AK |
2667 | return 0; |
2668 | } | |
2669 | ||
2670 | static int kvm_resume(struct sys_device *dev) | |
2671 | { | |
4267c41a | 2672 | hardware_enable(NULL); |
59ae6c6b AK |
2673 | return 0; |
2674 | } | |
2675 | ||
2676 | static struct sysdev_class kvm_sysdev_class = { | |
af5ca3f4 | 2677 | .name = "kvm", |
59ae6c6b AK |
2678 | .suspend = kvm_suspend, |
2679 | .resume = kvm_resume, | |
2680 | }; | |
2681 | ||
2682 | static struct sys_device kvm_sysdev = { | |
2683 | .id = 0, | |
2684 | .cls = &kvm_sysdev_class, | |
2685 | }; | |
2686 | ||
cea7bb21 | 2687 | struct page *bad_page; |
35149e21 | 2688 | pfn_t bad_pfn; |
6aa8b732 | 2689 | |
15ad7146 AK |
2690 | static inline |
2691 | struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn) | |
2692 | { | |
2693 | return container_of(pn, struct kvm_vcpu, preempt_notifier); | |
2694 | } | |
2695 | ||
2696 | static void kvm_sched_in(struct preempt_notifier *pn, int cpu) | |
2697 | { | |
2698 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
2699 | ||
e9b11c17 | 2700 | kvm_arch_vcpu_load(vcpu, cpu); |
15ad7146 AK |
2701 | } |
2702 | ||
2703 | static void kvm_sched_out(struct preempt_notifier *pn, | |
2704 | struct task_struct *next) | |
2705 | { | |
2706 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
2707 | ||
e9b11c17 | 2708 | kvm_arch_vcpu_put(vcpu); |
15ad7146 AK |
2709 | } |
2710 | ||
f8c16bba | 2711 | int kvm_init(void *opaque, unsigned int vcpu_size, |
c16f862d | 2712 | struct module *module) |
6aa8b732 AK |
2713 | { |
2714 | int r; | |
002c7f7c | 2715 | int cpu; |
6aa8b732 | 2716 | |
f8c16bba ZX |
2717 | r = kvm_arch_init(opaque); |
2718 | if (r) | |
d2308784 | 2719 | goto out_fail; |
cb498ea2 ZX |
2720 | |
2721 | bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
2722 | ||
2723 | if (bad_page == NULL) { | |
2724 | r = -ENOMEM; | |
2725 | goto out; | |
2726 | } | |
2727 | ||
35149e21 AL |
2728 | bad_pfn = page_to_pfn(bad_page); |
2729 | ||
8437a617 | 2730 | if (!zalloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) { |
7f59f492 RR |
2731 | r = -ENOMEM; |
2732 | goto out_free_0; | |
2733 | } | |
2734 | ||
e9b11c17 | 2735 | r = kvm_arch_hardware_setup(); |
6aa8b732 | 2736 | if (r < 0) |
7f59f492 | 2737 | goto out_free_0a; |
6aa8b732 | 2738 | |
002c7f7c YS |
2739 | for_each_online_cpu(cpu) { |
2740 | smp_call_function_single(cpu, | |
e9b11c17 | 2741 | kvm_arch_check_processor_compat, |
8691e5a8 | 2742 | &r, 1); |
002c7f7c | 2743 | if (r < 0) |
d2308784 | 2744 | goto out_free_1; |
002c7f7c YS |
2745 | } |
2746 | ||
15c8b6c1 | 2747 | on_each_cpu(hardware_enable, NULL, 1); |
774c47f1 AK |
2748 | r = register_cpu_notifier(&kvm_cpu_notifier); |
2749 | if (r) | |
d2308784 | 2750 | goto out_free_2; |
6aa8b732 AK |
2751 | register_reboot_notifier(&kvm_reboot_notifier); |
2752 | ||
59ae6c6b AK |
2753 | r = sysdev_class_register(&kvm_sysdev_class); |
2754 | if (r) | |
d2308784 | 2755 | goto out_free_3; |
59ae6c6b AK |
2756 | |
2757 | r = sysdev_register(&kvm_sysdev); | |
2758 | if (r) | |
d2308784 | 2759 | goto out_free_4; |
59ae6c6b | 2760 | |
c16f862d RR |
2761 | /* A kmem cache lets us meet the alignment requirements of fx_save. */ |
2762 | kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, | |
56919c5c JP |
2763 | __alignof__(struct kvm_vcpu), |
2764 | 0, NULL); | |
c16f862d RR |
2765 | if (!kvm_vcpu_cache) { |
2766 | r = -ENOMEM; | |
d2308784 | 2767 | goto out_free_5; |
c16f862d RR |
2768 | } |
2769 | ||
6aa8b732 | 2770 | kvm_chardev_ops.owner = module; |
3d3aab1b CB |
2771 | kvm_vm_fops.owner = module; |
2772 | kvm_vcpu_fops.owner = module; | |
6aa8b732 AK |
2773 | |
2774 | r = misc_register(&kvm_dev); | |
2775 | if (r) { | |
d77c26fc | 2776 | printk(KERN_ERR "kvm: misc device register failed\n"); |
6aa8b732 AK |
2777 | goto out_free; |
2778 | } | |
2779 | ||
15ad7146 AK |
2780 | kvm_preempt_ops.sched_in = kvm_sched_in; |
2781 | kvm_preempt_ops.sched_out = kvm_sched_out; | |
2782 | ||
0ea4ed8e DW |
2783 | kvm_init_debug(); |
2784 | ||
c7addb90 | 2785 | return 0; |
6aa8b732 AK |
2786 | |
2787 | out_free: | |
c16f862d | 2788 | kmem_cache_destroy(kvm_vcpu_cache); |
d2308784 | 2789 | out_free_5: |
59ae6c6b | 2790 | sysdev_unregister(&kvm_sysdev); |
d2308784 | 2791 | out_free_4: |
59ae6c6b | 2792 | sysdev_class_unregister(&kvm_sysdev_class); |
d2308784 | 2793 | out_free_3: |
6aa8b732 | 2794 | unregister_reboot_notifier(&kvm_reboot_notifier); |
774c47f1 | 2795 | unregister_cpu_notifier(&kvm_cpu_notifier); |
d2308784 | 2796 | out_free_2: |
15c8b6c1 | 2797 | on_each_cpu(hardware_disable, NULL, 1); |
d2308784 | 2798 | out_free_1: |
e9b11c17 | 2799 | kvm_arch_hardware_unsetup(); |
7f59f492 RR |
2800 | out_free_0a: |
2801 | free_cpumask_var(cpus_hardware_enabled); | |
d2308784 ZX |
2802 | out_free_0: |
2803 | __free_page(bad_page); | |
ca45aaae | 2804 | out: |
f8c16bba | 2805 | kvm_arch_exit(); |
d2308784 | 2806 | out_fail: |
6aa8b732 AK |
2807 | return r; |
2808 | } | |
cb498ea2 | 2809 | EXPORT_SYMBOL_GPL(kvm_init); |
6aa8b732 | 2810 | |
cb498ea2 | 2811 | void kvm_exit(void) |
6aa8b732 | 2812 | { |
229456fc | 2813 | tracepoint_synchronize_unregister(); |
0ea4ed8e | 2814 | kvm_exit_debug(); |
6aa8b732 | 2815 | misc_deregister(&kvm_dev); |
c16f862d | 2816 | kmem_cache_destroy(kvm_vcpu_cache); |
59ae6c6b AK |
2817 | sysdev_unregister(&kvm_sysdev); |
2818 | sysdev_class_unregister(&kvm_sysdev_class); | |
6aa8b732 | 2819 | unregister_reboot_notifier(&kvm_reboot_notifier); |
59ae6c6b | 2820 | unregister_cpu_notifier(&kvm_cpu_notifier); |
15c8b6c1 | 2821 | on_each_cpu(hardware_disable, NULL, 1); |
e9b11c17 | 2822 | kvm_arch_hardware_unsetup(); |
f8c16bba | 2823 | kvm_arch_exit(); |
7f59f492 | 2824 | free_cpumask_var(cpus_hardware_enabled); |
cea7bb21 | 2825 | __free_page(bad_page); |
6aa8b732 | 2826 | } |
cb498ea2 | 2827 | EXPORT_SYMBOL_GPL(kvm_exit); |