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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> |
c8240bd6 | 51 | #include <asm-generic/bitops/le.h> |
6aa8b732 | 52 | |
5f94c174 LV |
53 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
54 | #include "coalesced_mmio.h" | |
55 | #endif | |
56 | ||
8a98f664 XZ |
57 | #ifdef KVM_CAP_DEVICE_ASSIGNMENT |
58 | #include <linux/pci.h> | |
59 | #include <linux/interrupt.h> | |
60 | #include "irq.h" | |
61 | #endif | |
62 | ||
229456fc MT |
63 | #define CREATE_TRACE_POINTS |
64 | #include <trace/events/kvm.h> | |
65 | ||
6aa8b732 AK |
66 | MODULE_AUTHOR("Qumranet"); |
67 | MODULE_LICENSE("GPL"); | |
68 | ||
fa40a821 MT |
69 | /* |
70 | * Ordering of locks: | |
71 | * | |
22fc0294 | 72 | * kvm->slots_lock --> kvm->lock --> kvm->irq_lock |
fa40a821 MT |
73 | */ |
74 | ||
e9b11c17 ZX |
75 | DEFINE_SPINLOCK(kvm_lock); |
76 | LIST_HEAD(vm_list); | |
133de902 | 77 | |
7f59f492 | 78 | static cpumask_var_t cpus_hardware_enabled; |
1b6c0168 | 79 | |
c16f862d RR |
80 | struct kmem_cache *kvm_vcpu_cache; |
81 | EXPORT_SYMBOL_GPL(kvm_vcpu_cache); | |
1165f5fe | 82 | |
15ad7146 AK |
83 | static __read_mostly struct preempt_ops kvm_preempt_ops; |
84 | ||
76f7c879 | 85 | struct dentry *kvm_debugfs_dir; |
6aa8b732 | 86 | |
bccf2150 AK |
87 | static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, |
88 | unsigned long arg); | |
89 | ||
e8ba5d31 | 90 | static bool kvm_rebooting; |
4ecac3fd | 91 | |
54dee993 MT |
92 | static bool largepages_enabled = true; |
93 | ||
8a98f664 XZ |
94 | #ifdef KVM_CAP_DEVICE_ASSIGNMENT |
95 | static struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head, | |
96 | int assigned_dev_id) | |
97 | { | |
98 | struct list_head *ptr; | |
99 | struct kvm_assigned_dev_kernel *match; | |
100 | ||
101 | list_for_each(ptr, head) { | |
102 | match = list_entry(ptr, struct kvm_assigned_dev_kernel, list); | |
103 | if (match->assigned_dev_id == assigned_dev_id) | |
104 | return match; | |
105 | } | |
106 | return NULL; | |
107 | } | |
108 | ||
2350bd1f SY |
109 | static int find_index_from_host_irq(struct kvm_assigned_dev_kernel |
110 | *assigned_dev, int irq) | |
111 | { | |
112 | int i, index; | |
113 | struct msix_entry *host_msix_entries; | |
114 | ||
115 | host_msix_entries = assigned_dev->host_msix_entries; | |
116 | ||
117 | index = -1; | |
118 | for (i = 0; i < assigned_dev->entries_nr; i++) | |
119 | if (irq == host_msix_entries[i].vector) { | |
120 | index = i; | |
121 | break; | |
122 | } | |
123 | if (index < 0) { | |
124 | printk(KERN_WARNING "Fail to find correlated MSI-X entry!\n"); | |
125 | return 0; | |
126 | } | |
127 | ||
128 | return index; | |
129 | } | |
130 | ||
8a98f664 XZ |
131 | static void kvm_assigned_dev_interrupt_work_handler(struct work_struct *work) |
132 | { | |
133 | struct kvm_assigned_dev_kernel *assigned_dev; | |
2350bd1f | 134 | struct kvm *kvm; |
968a6347 | 135 | int i; |
8a98f664 XZ |
136 | |
137 | assigned_dev = container_of(work, struct kvm_assigned_dev_kernel, | |
138 | interrupt_work); | |
2350bd1f | 139 | kvm = assigned_dev->kvm; |
8a98f664 | 140 | |
fa40a821 | 141 | mutex_lock(&kvm->irq_lock); |
547de29e | 142 | spin_lock_irq(&assigned_dev->assigned_dev_lock); |
e56d532f | 143 | if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) { |
2350bd1f SY |
144 | struct kvm_guest_msix_entry *guest_entries = |
145 | assigned_dev->guest_msix_entries; | |
146 | for (i = 0; i < assigned_dev->entries_nr; i++) { | |
147 | if (!(guest_entries[i].flags & | |
148 | KVM_ASSIGNED_MSIX_PENDING)) | |
149 | continue; | |
150 | guest_entries[i].flags &= ~KVM_ASSIGNED_MSIX_PENDING; | |
151 | kvm_set_irq(assigned_dev->kvm, | |
152 | assigned_dev->irq_source_id, | |
153 | guest_entries[i].vector, 1); | |
2350bd1f | 154 | } |
968a6347 | 155 | } else |
2350bd1f SY |
156 | kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id, |
157 | assigned_dev->guest_irq, 1); | |
2350bd1f | 158 | |
547de29e | 159 | spin_unlock_irq(&assigned_dev->assigned_dev_lock); |
fa40a821 | 160 | mutex_unlock(&assigned_dev->kvm->irq_lock); |
8a98f664 XZ |
161 | } |
162 | ||
8a98f664 XZ |
163 | static irqreturn_t kvm_assigned_dev_intr(int irq, void *dev_id) |
164 | { | |
547de29e | 165 | unsigned long flags; |
8a98f664 XZ |
166 | struct kvm_assigned_dev_kernel *assigned_dev = |
167 | (struct kvm_assigned_dev_kernel *) dev_id; | |
168 | ||
547de29e | 169 | spin_lock_irqsave(&assigned_dev->assigned_dev_lock, flags); |
e56d532f | 170 | if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) { |
2350bd1f SY |
171 | int index = find_index_from_host_irq(assigned_dev, irq); |
172 | if (index < 0) | |
547de29e | 173 | goto out; |
2350bd1f SY |
174 | assigned_dev->guest_msix_entries[index].flags |= |
175 | KVM_ASSIGNED_MSIX_PENDING; | |
176 | } | |
177 | ||
8a98f664 | 178 | schedule_work(&assigned_dev->interrupt_work); |
defaf158 | 179 | |
968a6347 SY |
180 | if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_GUEST_INTX) { |
181 | disable_irq_nosync(irq); | |
182 | assigned_dev->host_irq_disabled = true; | |
183 | } | |
defaf158 | 184 | |
547de29e MT |
185 | out: |
186 | spin_unlock_irqrestore(&assigned_dev->assigned_dev_lock, flags); | |
8a98f664 XZ |
187 | return IRQ_HANDLED; |
188 | } | |
189 | ||
190 | /* Ack the irq line for an assigned device */ | |
191 | static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian) | |
192 | { | |
193 | struct kvm_assigned_dev_kernel *dev; | |
547de29e | 194 | unsigned long flags; |
8a98f664 XZ |
195 | |
196 | if (kian->gsi == -1) | |
197 | return; | |
198 | ||
199 | dev = container_of(kian, struct kvm_assigned_dev_kernel, | |
200 | ack_notifier); | |
defaf158 | 201 | |
5550af4d | 202 | kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0); |
defaf158 MM |
203 | |
204 | /* The guest irq may be shared so this ack may be | |
205 | * from another device. | |
206 | */ | |
547de29e | 207 | spin_lock_irqsave(&dev->assigned_dev_lock, flags); |
defaf158 MM |
208 | if (dev->host_irq_disabled) { |
209 | enable_irq(dev->host_irq); | |
210 | dev->host_irq_disabled = false; | |
211 | } | |
547de29e | 212 | spin_unlock_irqrestore(&dev->assigned_dev_lock, flags); |
8a98f664 XZ |
213 | } |
214 | ||
e56d532f SY |
215 | static void deassign_guest_irq(struct kvm *kvm, |
216 | struct kvm_assigned_dev_kernel *assigned_dev) | |
8a98f664 | 217 | { |
fa40a821 | 218 | kvm_unregister_irq_ack_notifier(kvm, &assigned_dev->ack_notifier); |
e56d532f | 219 | assigned_dev->ack_notifier.gsi = -1; |
f29b2673 MM |
220 | |
221 | if (assigned_dev->irq_source_id != -1) | |
222 | kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id); | |
223 | assigned_dev->irq_source_id = -1; | |
e56d532f SY |
224 | assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_GUEST_MASK); |
225 | } | |
8a98f664 | 226 | |
e56d532f SY |
227 | /* The function implicit hold kvm->lock mutex due to cancel_work_sync() */ |
228 | static void deassign_host_irq(struct kvm *kvm, | |
229 | struct kvm_assigned_dev_kernel *assigned_dev) | |
230 | { | |
ba4cef31 SY |
231 | /* |
232 | * In kvm_free_device_irq, cancel_work_sync return true if: | |
233 | * 1. work is scheduled, and then cancelled. | |
234 | * 2. work callback is executed. | |
235 | * | |
236 | * The first one ensured that the irq is disabled and no more events | |
237 | * would happen. But for the second one, the irq may be enabled (e.g. | |
238 | * for MSI). So we disable irq here to prevent further events. | |
239 | * | |
240 | * Notice this maybe result in nested disable if the interrupt type is | |
241 | * INTx, but it's OK for we are going to free it. | |
242 | * | |
243 | * If this function is a part of VM destroy, please ensure that till | |
244 | * now, the kvm state is still legal for probably we also have to wait | |
245 | * interrupt_work done. | |
246 | */ | |
e56d532f | 247 | if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) { |
d510d6cc SY |
248 | int i; |
249 | for (i = 0; i < assigned_dev->entries_nr; i++) | |
250 | disable_irq_nosync(assigned_dev-> | |
251 | host_msix_entries[i].vector); | |
252 | ||
253 | cancel_work_sync(&assigned_dev->interrupt_work); | |
254 | ||
255 | for (i = 0; i < assigned_dev->entries_nr; i++) | |
256 | free_irq(assigned_dev->host_msix_entries[i].vector, | |
257 | (void *)assigned_dev); | |
258 | ||
259 | assigned_dev->entries_nr = 0; | |
260 | kfree(assigned_dev->host_msix_entries); | |
261 | kfree(assigned_dev->guest_msix_entries); | |
262 | pci_disable_msix(assigned_dev->dev); | |
263 | } else { | |
264 | /* Deal with MSI and INTx */ | |
265 | disable_irq_nosync(assigned_dev->host_irq); | |
266 | cancel_work_sync(&assigned_dev->interrupt_work); | |
8a98f664 | 267 | |
d510d6cc | 268 | free_irq(assigned_dev->host_irq, (void *)assigned_dev); |
4a643be8 | 269 | |
e56d532f | 270 | if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSI) |
d510d6cc SY |
271 | pci_disable_msi(assigned_dev->dev); |
272 | } | |
4a643be8 | 273 | |
e56d532f SY |
274 | assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_HOST_MASK); |
275 | } | |
276 | ||
277 | static int kvm_deassign_irq(struct kvm *kvm, | |
278 | struct kvm_assigned_dev_kernel *assigned_dev, | |
279 | unsigned long irq_requested_type) | |
280 | { | |
281 | unsigned long guest_irq_type, host_irq_type; | |
282 | ||
283 | if (!irqchip_in_kernel(kvm)) | |
284 | return -EINVAL; | |
285 | /* no irq assignment to deassign */ | |
286 | if (!assigned_dev->irq_requested_type) | |
287 | return -ENXIO; | |
288 | ||
289 | host_irq_type = irq_requested_type & KVM_DEV_IRQ_HOST_MASK; | |
290 | guest_irq_type = irq_requested_type & KVM_DEV_IRQ_GUEST_MASK; | |
291 | ||
292 | if (host_irq_type) | |
293 | deassign_host_irq(kvm, assigned_dev); | |
294 | if (guest_irq_type) | |
295 | deassign_guest_irq(kvm, assigned_dev); | |
296 | ||
297 | return 0; | |
4a643be8 MM |
298 | } |
299 | ||
e56d532f SY |
300 | static void kvm_free_assigned_irq(struct kvm *kvm, |
301 | struct kvm_assigned_dev_kernel *assigned_dev) | |
302 | { | |
303 | kvm_deassign_irq(kvm, assigned_dev, assigned_dev->irq_requested_type); | |
304 | } | |
4a643be8 MM |
305 | |
306 | static void kvm_free_assigned_device(struct kvm *kvm, | |
307 | struct kvm_assigned_dev_kernel | |
308 | *assigned_dev) | |
309 | { | |
310 | kvm_free_assigned_irq(kvm, assigned_dev); | |
311 | ||
6eb55818 SY |
312 | pci_reset_function(assigned_dev->dev); |
313 | ||
8a98f664 XZ |
314 | pci_release_regions(assigned_dev->dev); |
315 | pci_disable_device(assigned_dev->dev); | |
316 | pci_dev_put(assigned_dev->dev); | |
317 | ||
318 | list_del(&assigned_dev->list); | |
319 | kfree(assigned_dev); | |
320 | } | |
321 | ||
322 | void kvm_free_all_assigned_devices(struct kvm *kvm) | |
323 | { | |
324 | struct list_head *ptr, *ptr2; | |
325 | struct kvm_assigned_dev_kernel *assigned_dev; | |
326 | ||
327 | list_for_each_safe(ptr, ptr2, &kvm->arch.assigned_dev_head) { | |
328 | assigned_dev = list_entry(ptr, | |
329 | struct kvm_assigned_dev_kernel, | |
330 | list); | |
331 | ||
332 | kvm_free_assigned_device(kvm, assigned_dev); | |
333 | } | |
334 | } | |
335 | ||
e56d532f SY |
336 | static int assigned_device_enable_host_intx(struct kvm *kvm, |
337 | struct kvm_assigned_dev_kernel *dev) | |
00e3ed39 | 338 | { |
e56d532f SY |
339 | dev->host_irq = dev->dev->irq; |
340 | /* Even though this is PCI, we don't want to use shared | |
341 | * interrupts. Sharing host devices with guest-assigned devices | |
342 | * on the same interrupt line is not a happy situation: there | |
343 | * are going to be long delays in accepting, acking, etc. | |
344 | */ | |
345 | if (request_irq(dev->host_irq, kvm_assigned_dev_intr, | |
346 | 0, "kvm_assigned_intx_device", (void *)dev)) | |
347 | return -EIO; | |
348 | return 0; | |
349 | } | |
6b9cc7fd | 350 | |
e56d532f SY |
351 | #ifdef __KVM_HAVE_MSI |
352 | static int assigned_device_enable_host_msi(struct kvm *kvm, | |
353 | struct kvm_assigned_dev_kernel *dev) | |
354 | { | |
355 | int r; | |
00e3ed39 | 356 | |
e56d532f SY |
357 | if (!dev->dev->msi_enabled) { |
358 | r = pci_enable_msi(dev->dev); | |
359 | if (r) | |
360 | return r; | |
361 | } | |
00e3ed39 | 362 | |
e56d532f SY |
363 | dev->host_irq = dev->dev->irq; |
364 | if (request_irq(dev->host_irq, kvm_assigned_dev_intr, 0, | |
365 | "kvm_assigned_msi_device", (void *)dev)) { | |
366 | pci_disable_msi(dev->dev); | |
367 | return -EIO; | |
00e3ed39 SY |
368 | } |
369 | ||
00e3ed39 SY |
370 | return 0; |
371 | } | |
e56d532f | 372 | #endif |
00e3ed39 | 373 | |
e56d532f SY |
374 | #ifdef __KVM_HAVE_MSIX |
375 | static int assigned_device_enable_host_msix(struct kvm *kvm, | |
376 | struct kvm_assigned_dev_kernel *dev) | |
6b9cc7fd | 377 | { |
e56d532f | 378 | int i, r = -EINVAL; |
6b9cc7fd | 379 | |
e56d532f SY |
380 | /* host_msix_entries and guest_msix_entries should have been |
381 | * initialized */ | |
382 | if (dev->entries_nr == 0) | |
383 | return r; | |
6b9cc7fd | 384 | |
e56d532f SY |
385 | r = pci_enable_msix(dev->dev, dev->host_msix_entries, dev->entries_nr); |
386 | if (r) | |
387 | return r; | |
6b9cc7fd | 388 | |
e56d532f SY |
389 | for (i = 0; i < dev->entries_nr; i++) { |
390 | r = request_irq(dev->host_msix_entries[i].vector, | |
391 | kvm_assigned_dev_intr, 0, | |
392 | "kvm_assigned_msix_device", | |
393 | (void *)dev); | |
394 | /* FIXME: free requested_irq's on failure */ | |
395 | if (r) | |
396 | return r; | |
397 | } | |
5319c662 | 398 | |
e56d532f SY |
399 | return 0; |
400 | } | |
6b9cc7fd | 401 | |
e56d532f | 402 | #endif |
6b9cc7fd | 403 | |
e56d532f SY |
404 | static int assigned_device_enable_guest_intx(struct kvm *kvm, |
405 | struct kvm_assigned_dev_kernel *dev, | |
406 | struct kvm_assigned_irq *irq) | |
407 | { | |
408 | dev->guest_irq = irq->guest_irq; | |
409 | dev->ack_notifier.gsi = irq->guest_irq; | |
410 | return 0; | |
411 | } | |
5319c662 | 412 | |
e56d532f SY |
413 | #ifdef __KVM_HAVE_MSI |
414 | static int assigned_device_enable_guest_msi(struct kvm *kvm, | |
415 | struct kvm_assigned_dev_kernel *dev, | |
416 | struct kvm_assigned_irq *irq) | |
417 | { | |
418 | dev->guest_irq = irq->guest_irq; | |
419 | dev->ack_notifier.gsi = -1; | |
968a6347 | 420 | dev->host_irq_disabled = false; |
6b9cc7fd SY |
421 | return 0; |
422 | } | |
423 | #endif | |
e56d532f SY |
424 | #ifdef __KVM_HAVE_MSIX |
425 | static int assigned_device_enable_guest_msix(struct kvm *kvm, | |
426 | struct kvm_assigned_dev_kernel *dev, | |
427 | struct kvm_assigned_irq *irq) | |
428 | { | |
429 | dev->guest_irq = irq->guest_irq; | |
430 | dev->ack_notifier.gsi = -1; | |
968a6347 | 431 | dev->host_irq_disabled = false; |
e56d532f SY |
432 | return 0; |
433 | } | |
434 | #endif | |
435 | ||
436 | static int assign_host_irq(struct kvm *kvm, | |
437 | struct kvm_assigned_dev_kernel *dev, | |
438 | __u32 host_irq_type) | |
439 | { | |
440 | int r = -EEXIST; | |
441 | ||
442 | if (dev->irq_requested_type & KVM_DEV_IRQ_HOST_MASK) | |
443 | return r; | |
6b9cc7fd | 444 | |
e56d532f SY |
445 | switch (host_irq_type) { |
446 | case KVM_DEV_IRQ_HOST_INTX: | |
447 | r = assigned_device_enable_host_intx(kvm, dev); | |
448 | break; | |
449 | #ifdef __KVM_HAVE_MSI | |
450 | case KVM_DEV_IRQ_HOST_MSI: | |
451 | r = assigned_device_enable_host_msi(kvm, dev); | |
452 | break; | |
453 | #endif | |
d510d6cc | 454 | #ifdef __KVM_HAVE_MSIX |
e56d532f SY |
455 | case KVM_DEV_IRQ_HOST_MSIX: |
456 | r = assigned_device_enable_host_msix(kvm, dev); | |
457 | break; | |
458 | #endif | |
459 | default: | |
460 | r = -EINVAL; | |
461 | } | |
d510d6cc | 462 | |
e56d532f SY |
463 | if (!r) |
464 | dev->irq_requested_type |= host_irq_type; | |
d510d6cc | 465 | |
e56d532f SY |
466 | return r; |
467 | } | |
d510d6cc | 468 | |
e56d532f SY |
469 | static int assign_guest_irq(struct kvm *kvm, |
470 | struct kvm_assigned_dev_kernel *dev, | |
471 | struct kvm_assigned_irq *irq, | |
472 | unsigned long guest_irq_type) | |
473 | { | |
474 | int id; | |
475 | int r = -EEXIST; | |
d510d6cc | 476 | |
e56d532f SY |
477 | if (dev->irq_requested_type & KVM_DEV_IRQ_GUEST_MASK) |
478 | return r; | |
479 | ||
480 | id = kvm_request_irq_source_id(kvm); | |
481 | if (id < 0) | |
482 | return id; | |
483 | ||
484 | dev->irq_source_id = id; | |
485 | ||
486 | switch (guest_irq_type) { | |
487 | case KVM_DEV_IRQ_GUEST_INTX: | |
488 | r = assigned_device_enable_guest_intx(kvm, dev, irq); | |
489 | break; | |
490 | #ifdef __KVM_HAVE_MSI | |
491 | case KVM_DEV_IRQ_GUEST_MSI: | |
492 | r = assigned_device_enable_guest_msi(kvm, dev, irq); | |
493 | break; | |
494 | #endif | |
495 | #ifdef __KVM_HAVE_MSIX | |
496 | case KVM_DEV_IRQ_GUEST_MSIX: | |
497 | r = assigned_device_enable_guest_msix(kvm, dev, irq); | |
498 | break; | |
499 | #endif | |
500 | default: | |
501 | r = -EINVAL; | |
d510d6cc SY |
502 | } |
503 | ||
e56d532f SY |
504 | if (!r) { |
505 | dev->irq_requested_type |= guest_irq_type; | |
506 | kvm_register_irq_ack_notifier(kvm, &dev->ack_notifier); | |
507 | } else | |
508 | kvm_free_irq_source_id(kvm, dev->irq_source_id); | |
d510d6cc | 509 | |
e56d532f | 510 | return r; |
d510d6cc | 511 | } |
d510d6cc | 512 | |
e56d532f | 513 | /* TODO Deal with KVM_DEV_IRQ_ASSIGNED_MASK_MSIX */ |
8a98f664 | 514 | static int kvm_vm_ioctl_assign_irq(struct kvm *kvm, |
e56d532f | 515 | struct kvm_assigned_irq *assigned_irq) |
8a98f664 | 516 | { |
e56d532f | 517 | int r = -EINVAL; |
8a98f664 | 518 | struct kvm_assigned_dev_kernel *match; |
e56d532f | 519 | unsigned long host_irq_type, guest_irq_type; |
8a98f664 | 520 | |
e56d532f SY |
521 | if (!capable(CAP_SYS_RAWIO)) |
522 | return -EPERM; | |
8a98f664 | 523 | |
e56d532f SY |
524 | if (!irqchip_in_kernel(kvm)) |
525 | return r; | |
526 | ||
527 | mutex_lock(&kvm->lock); | |
528 | r = -ENODEV; | |
8a98f664 XZ |
529 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, |
530 | assigned_irq->assigned_dev_id); | |
e56d532f SY |
531 | if (!match) |
532 | goto out; | |
8a98f664 | 533 | |
e56d532f SY |
534 | host_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_HOST_MASK); |
535 | guest_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_GUEST_MASK); | |
17071fe7 | 536 | |
e56d532f SY |
537 | r = -EINVAL; |
538 | /* can only assign one type at a time */ | |
539 | if (hweight_long(host_irq_type) > 1) | |
540 | goto out; | |
541 | if (hweight_long(guest_irq_type) > 1) | |
542 | goto out; | |
543 | if (host_irq_type == 0 && guest_irq_type == 0) | |
544 | goto out; | |
17071fe7 | 545 | |
e56d532f SY |
546 | r = 0; |
547 | if (host_irq_type) | |
548 | r = assign_host_irq(kvm, match, host_irq_type); | |
549 | if (r) | |
550 | goto out; | |
8a98f664 | 551 | |
e56d532f SY |
552 | if (guest_irq_type) |
553 | r = assign_guest_irq(kvm, match, assigned_irq, guest_irq_type); | |
554 | out: | |
8a98f664 XZ |
555 | mutex_unlock(&kvm->lock); |
556 | return r; | |
e56d532f SY |
557 | } |
558 | ||
559 | static int kvm_vm_ioctl_deassign_dev_irq(struct kvm *kvm, | |
560 | struct kvm_assigned_irq | |
561 | *assigned_irq) | |
562 | { | |
563 | int r = -ENODEV; | |
564 | struct kvm_assigned_dev_kernel *match; | |
565 | ||
566 | mutex_lock(&kvm->lock); | |
567 | ||
568 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
569 | assigned_irq->assigned_dev_id); | |
570 | if (!match) | |
571 | goto out; | |
572 | ||
573 | r = kvm_deassign_irq(kvm, match, assigned_irq->flags); | |
574 | out: | |
8a98f664 | 575 | mutex_unlock(&kvm->lock); |
8a98f664 XZ |
576 | return r; |
577 | } | |
578 | ||
579 | static int kvm_vm_ioctl_assign_device(struct kvm *kvm, | |
580 | struct kvm_assigned_pci_dev *assigned_dev) | |
581 | { | |
582 | int r = 0; | |
583 | struct kvm_assigned_dev_kernel *match; | |
584 | struct pci_dev *dev; | |
585 | ||
682edb4c | 586 | down_read(&kvm->slots_lock); |
8a98f664 XZ |
587 | mutex_lock(&kvm->lock); |
588 | ||
589 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
590 | assigned_dev->assigned_dev_id); | |
591 | if (match) { | |
592 | /* device already assigned */ | |
e56d532f | 593 | r = -EEXIST; |
8a98f664 XZ |
594 | goto out; |
595 | } | |
596 | ||
597 | match = kzalloc(sizeof(struct kvm_assigned_dev_kernel), GFP_KERNEL); | |
598 | if (match == NULL) { | |
599 | printk(KERN_INFO "%s: Couldn't allocate memory\n", | |
600 | __func__); | |
601 | r = -ENOMEM; | |
602 | goto out; | |
603 | } | |
604 | dev = pci_get_bus_and_slot(assigned_dev->busnr, | |
605 | assigned_dev->devfn); | |
606 | if (!dev) { | |
607 | printk(KERN_INFO "%s: host device not found\n", __func__); | |
608 | r = -EINVAL; | |
609 | goto out_free; | |
610 | } | |
611 | if (pci_enable_device(dev)) { | |
612 | printk(KERN_INFO "%s: Could not enable PCI device\n", __func__); | |
613 | r = -EBUSY; | |
614 | goto out_put; | |
615 | } | |
616 | r = pci_request_regions(dev, "kvm_assigned_device"); | |
617 | if (r) { | |
618 | printk(KERN_INFO "%s: Could not get access to device regions\n", | |
619 | __func__); | |
620 | goto out_disable; | |
621 | } | |
6eb55818 SY |
622 | |
623 | pci_reset_function(dev); | |
624 | ||
8a98f664 XZ |
625 | match->assigned_dev_id = assigned_dev->assigned_dev_id; |
626 | match->host_busnr = assigned_dev->busnr; | |
627 | match->host_devfn = assigned_dev->devfn; | |
b653574a | 628 | match->flags = assigned_dev->flags; |
8a98f664 | 629 | match->dev = dev; |
547de29e | 630 | spin_lock_init(&match->assigned_dev_lock); |
f29b2673 | 631 | match->irq_source_id = -1; |
8a98f664 | 632 | match->kvm = kvm; |
e56d532f SY |
633 | match->ack_notifier.irq_acked = kvm_assigned_dev_ack_irq; |
634 | INIT_WORK(&match->interrupt_work, | |
635 | kvm_assigned_dev_interrupt_work_handler); | |
8a98f664 XZ |
636 | |
637 | list_add(&match->list, &kvm->arch.assigned_dev_head); | |
638 | ||
639 | if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) { | |
19de40a8 | 640 | if (!kvm->arch.iommu_domain) { |
260782bc WH |
641 | r = kvm_iommu_map_guest(kvm); |
642 | if (r) | |
643 | goto out_list_del; | |
644 | } | |
645 | r = kvm_assign_device(kvm, match); | |
8a98f664 XZ |
646 | if (r) |
647 | goto out_list_del; | |
648 | } | |
649 | ||
650 | out: | |
651 | mutex_unlock(&kvm->lock); | |
682edb4c | 652 | up_read(&kvm->slots_lock); |
8a98f664 XZ |
653 | return r; |
654 | out_list_del: | |
655 | list_del(&match->list); | |
656 | pci_release_regions(dev); | |
657 | out_disable: | |
658 | pci_disable_device(dev); | |
659 | out_put: | |
660 | pci_dev_put(dev); | |
661 | out_free: | |
662 | kfree(match); | |
663 | mutex_unlock(&kvm->lock); | |
682edb4c | 664 | up_read(&kvm->slots_lock); |
8a98f664 XZ |
665 | return r; |
666 | } | |
667 | #endif | |
668 | ||
0a920356 WH |
669 | #ifdef KVM_CAP_DEVICE_DEASSIGNMENT |
670 | static int kvm_vm_ioctl_deassign_device(struct kvm *kvm, | |
671 | struct kvm_assigned_pci_dev *assigned_dev) | |
672 | { | |
673 | int r = 0; | |
674 | struct kvm_assigned_dev_kernel *match; | |
675 | ||
676 | mutex_lock(&kvm->lock); | |
677 | ||
678 | match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
679 | assigned_dev->assigned_dev_id); | |
680 | if (!match) { | |
681 | printk(KERN_INFO "%s: device hasn't been assigned before, " | |
682 | "so cannot be deassigned\n", __func__); | |
683 | r = -EINVAL; | |
684 | goto out; | |
685 | } | |
686 | ||
4a906e49 | 687 | if (match->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) |
0a920356 WH |
688 | kvm_deassign_device(kvm, match); |
689 | ||
690 | kvm_free_assigned_device(kvm, match); | |
691 | ||
692 | out: | |
693 | mutex_unlock(&kvm->lock); | |
694 | return r; | |
695 | } | |
696 | #endif | |
697 | ||
c77fb9dc | 698 | inline int kvm_is_mmio_pfn(pfn_t pfn) |
cbff90a7 | 699 | { |
fc5659c8 JR |
700 | if (pfn_valid(pfn)) { |
701 | struct page *page = compound_head(pfn_to_page(pfn)); | |
702 | return PageReserved(page); | |
703 | } | |
cbff90a7 BAY |
704 | |
705 | return true; | |
706 | } | |
707 | ||
bccf2150 AK |
708 | /* |
709 | * Switches to specified vcpu, until a matching vcpu_put() | |
710 | */ | |
313a3dc7 | 711 | void vcpu_load(struct kvm_vcpu *vcpu) |
6aa8b732 | 712 | { |
15ad7146 AK |
713 | int cpu; |
714 | ||
bccf2150 | 715 | mutex_lock(&vcpu->mutex); |
15ad7146 AK |
716 | cpu = get_cpu(); |
717 | preempt_notifier_register(&vcpu->preempt_notifier); | |
313a3dc7 | 718 | kvm_arch_vcpu_load(vcpu, cpu); |
15ad7146 | 719 | put_cpu(); |
6aa8b732 AK |
720 | } |
721 | ||
313a3dc7 | 722 | void vcpu_put(struct kvm_vcpu *vcpu) |
6aa8b732 | 723 | { |
15ad7146 | 724 | preempt_disable(); |
313a3dc7 | 725 | kvm_arch_vcpu_put(vcpu); |
15ad7146 AK |
726 | preempt_notifier_unregister(&vcpu->preempt_notifier); |
727 | preempt_enable(); | |
6aa8b732 AK |
728 | mutex_unlock(&vcpu->mutex); |
729 | } | |
730 | ||
d9e368d6 AK |
731 | static void ack_flush(void *_completed) |
732 | { | |
d9e368d6 AK |
733 | } |
734 | ||
49846896 | 735 | static bool make_all_cpus_request(struct kvm *kvm, unsigned int req) |
d9e368d6 | 736 | { |
597a5f55 | 737 | int i, cpu, me; |
6ef7a1bc RR |
738 | cpumask_var_t cpus; |
739 | bool called = true; | |
d9e368d6 | 740 | struct kvm_vcpu *vcpu; |
d9e368d6 | 741 | |
79f55997 | 742 | zalloc_cpumask_var(&cpus, GFP_ATOMIC); |
6ef7a1bc | 743 | |
84261923 | 744 | spin_lock(&kvm->requests_lock); |
e601e3be | 745 | me = smp_processor_id(); |
988a2cae | 746 | kvm_for_each_vcpu(i, vcpu, kvm) { |
49846896 | 747 | if (test_and_set_bit(req, &vcpu->requests)) |
d9e368d6 AK |
748 | continue; |
749 | cpu = vcpu->cpu; | |
6ef7a1bc RR |
750 | if (cpus != NULL && cpu != -1 && cpu != me) |
751 | cpumask_set_cpu(cpu, cpus); | |
49846896 | 752 | } |
6ef7a1bc RR |
753 | if (unlikely(cpus == NULL)) |
754 | smp_call_function_many(cpu_online_mask, ack_flush, NULL, 1); | |
755 | else if (!cpumask_empty(cpus)) | |
756 | smp_call_function_many(cpus, ack_flush, NULL, 1); | |
757 | else | |
758 | called = false; | |
84261923 | 759 | spin_unlock(&kvm->requests_lock); |
6ef7a1bc | 760 | free_cpumask_var(cpus); |
49846896 | 761 | return called; |
d9e368d6 AK |
762 | } |
763 | ||
49846896 | 764 | void kvm_flush_remote_tlbs(struct kvm *kvm) |
2e53d63a | 765 | { |
49846896 RR |
766 | if (make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH)) |
767 | ++kvm->stat.remote_tlb_flush; | |
2e53d63a MT |
768 | } |
769 | ||
49846896 RR |
770 | void kvm_reload_remote_mmus(struct kvm *kvm) |
771 | { | |
772 | make_all_cpus_request(kvm, KVM_REQ_MMU_RELOAD); | |
773 | } | |
2e53d63a | 774 | |
fb3f0f51 RR |
775 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) |
776 | { | |
777 | struct page *page; | |
778 | int r; | |
779 | ||
780 | mutex_init(&vcpu->mutex); | |
781 | vcpu->cpu = -1; | |
fb3f0f51 RR |
782 | vcpu->kvm = kvm; |
783 | vcpu->vcpu_id = id; | |
b6958ce4 | 784 | init_waitqueue_head(&vcpu->wq); |
fb3f0f51 RR |
785 | |
786 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
787 | if (!page) { | |
788 | r = -ENOMEM; | |
789 | goto fail; | |
790 | } | |
791 | vcpu->run = page_address(page); | |
792 | ||
e9b11c17 | 793 | r = kvm_arch_vcpu_init(vcpu); |
fb3f0f51 | 794 | if (r < 0) |
e9b11c17 | 795 | goto fail_free_run; |
fb3f0f51 RR |
796 | return 0; |
797 | ||
fb3f0f51 RR |
798 | fail_free_run: |
799 | free_page((unsigned long)vcpu->run); | |
800 | fail: | |
76fafa5e | 801 | return r; |
fb3f0f51 RR |
802 | } |
803 | EXPORT_SYMBOL_GPL(kvm_vcpu_init); | |
804 | ||
805 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) | |
806 | { | |
e9b11c17 | 807 | kvm_arch_vcpu_uninit(vcpu); |
fb3f0f51 RR |
808 | free_page((unsigned long)vcpu->run); |
809 | } | |
810 | EXPORT_SYMBOL_GPL(kvm_vcpu_uninit); | |
811 | ||
e930bffe AA |
812 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
813 | static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn) | |
814 | { | |
815 | return container_of(mn, struct kvm, mmu_notifier); | |
816 | } | |
817 | ||
818 | static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn, | |
819 | struct mm_struct *mm, | |
820 | unsigned long address) | |
821 | { | |
822 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
823 | int need_tlb_flush; | |
824 | ||
825 | /* | |
826 | * When ->invalidate_page runs, the linux pte has been zapped | |
827 | * already but the page is still allocated until | |
828 | * ->invalidate_page returns. So if we increase the sequence | |
829 | * here the kvm page fault will notice if the spte can't be | |
830 | * established because the page is going to be freed. If | |
831 | * instead the kvm page fault establishes the spte before | |
832 | * ->invalidate_page runs, kvm_unmap_hva will release it | |
833 | * before returning. | |
834 | * | |
835 | * The sequence increase only need to be seen at spin_unlock | |
836 | * time, and not at spin_lock time. | |
837 | * | |
838 | * Increasing the sequence after the spin_unlock would be | |
839 | * unsafe because the kvm page fault could then establish the | |
840 | * pte after kvm_unmap_hva returned, without noticing the page | |
841 | * is going to be freed. | |
842 | */ | |
843 | spin_lock(&kvm->mmu_lock); | |
844 | kvm->mmu_notifier_seq++; | |
845 | need_tlb_flush = kvm_unmap_hva(kvm, address); | |
846 | spin_unlock(&kvm->mmu_lock); | |
847 | ||
848 | /* we've to flush the tlb before the pages can be freed */ | |
849 | if (need_tlb_flush) | |
850 | kvm_flush_remote_tlbs(kvm); | |
851 | ||
852 | } | |
853 | ||
3da0dd43 IE |
854 | static void kvm_mmu_notifier_change_pte(struct mmu_notifier *mn, |
855 | struct mm_struct *mm, | |
856 | unsigned long address, | |
857 | pte_t pte) | |
858 | { | |
859 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
860 | ||
861 | spin_lock(&kvm->mmu_lock); | |
862 | kvm->mmu_notifier_seq++; | |
863 | kvm_set_spte_hva(kvm, address, pte); | |
864 | spin_unlock(&kvm->mmu_lock); | |
865 | } | |
866 | ||
e930bffe AA |
867 | static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, |
868 | struct mm_struct *mm, | |
869 | unsigned long start, | |
870 | unsigned long end) | |
871 | { | |
872 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
873 | int need_tlb_flush = 0; | |
874 | ||
875 | spin_lock(&kvm->mmu_lock); | |
876 | /* | |
877 | * The count increase must become visible at unlock time as no | |
878 | * spte can be established without taking the mmu_lock and | |
879 | * count is also read inside the mmu_lock critical section. | |
880 | */ | |
881 | kvm->mmu_notifier_count++; | |
882 | for (; start < end; start += PAGE_SIZE) | |
883 | need_tlb_flush |= kvm_unmap_hva(kvm, start); | |
884 | spin_unlock(&kvm->mmu_lock); | |
885 | ||
886 | /* we've to flush the tlb before the pages can be freed */ | |
887 | if (need_tlb_flush) | |
888 | kvm_flush_remote_tlbs(kvm); | |
889 | } | |
890 | ||
891 | static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn, | |
892 | struct mm_struct *mm, | |
893 | unsigned long start, | |
894 | unsigned long end) | |
895 | { | |
896 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
897 | ||
898 | spin_lock(&kvm->mmu_lock); | |
899 | /* | |
900 | * This sequence increase will notify the kvm page fault that | |
901 | * the page that is going to be mapped in the spte could have | |
902 | * been freed. | |
903 | */ | |
904 | kvm->mmu_notifier_seq++; | |
905 | /* | |
906 | * The above sequence increase must be visible before the | |
907 | * below count decrease but both values are read by the kvm | |
908 | * page fault under mmu_lock spinlock so we don't need to add | |
909 | * a smb_wmb() here in between the two. | |
910 | */ | |
911 | kvm->mmu_notifier_count--; | |
912 | spin_unlock(&kvm->mmu_lock); | |
913 | ||
914 | BUG_ON(kvm->mmu_notifier_count < 0); | |
915 | } | |
916 | ||
917 | static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn, | |
918 | struct mm_struct *mm, | |
919 | unsigned long address) | |
920 | { | |
921 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
922 | int young; | |
923 | ||
924 | spin_lock(&kvm->mmu_lock); | |
925 | young = kvm_age_hva(kvm, address); | |
926 | spin_unlock(&kvm->mmu_lock); | |
927 | ||
928 | if (young) | |
929 | kvm_flush_remote_tlbs(kvm); | |
930 | ||
931 | return young; | |
932 | } | |
933 | ||
85db06e5 MT |
934 | static void kvm_mmu_notifier_release(struct mmu_notifier *mn, |
935 | struct mm_struct *mm) | |
936 | { | |
937 | struct kvm *kvm = mmu_notifier_to_kvm(mn); | |
938 | kvm_arch_flush_shadow(kvm); | |
939 | } | |
940 | ||
e930bffe AA |
941 | static const struct mmu_notifier_ops kvm_mmu_notifier_ops = { |
942 | .invalidate_page = kvm_mmu_notifier_invalidate_page, | |
943 | .invalidate_range_start = kvm_mmu_notifier_invalidate_range_start, | |
944 | .invalidate_range_end = kvm_mmu_notifier_invalidate_range_end, | |
945 | .clear_flush_young = kvm_mmu_notifier_clear_flush_young, | |
3da0dd43 | 946 | .change_pte = kvm_mmu_notifier_change_pte, |
85db06e5 | 947 | .release = kvm_mmu_notifier_release, |
e930bffe AA |
948 | }; |
949 | #endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */ | |
950 | ||
f17abe9a | 951 | static struct kvm *kvm_create_vm(void) |
6aa8b732 | 952 | { |
d19a9cd2 | 953 | struct kvm *kvm = kvm_arch_create_vm(); |
5f94c174 LV |
954 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
955 | struct page *page; | |
956 | #endif | |
6aa8b732 | 957 | |
d19a9cd2 ZX |
958 | if (IS_ERR(kvm)) |
959 | goto out; | |
75858a84 | 960 | #ifdef CONFIG_HAVE_KVM_IRQCHIP |
399ec807 | 961 | INIT_LIST_HEAD(&kvm->irq_routing); |
75858a84 AK |
962 | INIT_HLIST_HEAD(&kvm->mask_notifier_list); |
963 | #endif | |
6aa8b732 | 964 | |
5f94c174 LV |
965 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
966 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
967 | if (!page) { | |
968 | kfree(kvm); | |
969 | return ERR_PTR(-ENOMEM); | |
970 | } | |
971 | kvm->coalesced_mmio_ring = | |
972 | (struct kvm_coalesced_mmio_ring *)page_address(page); | |
973 | #endif | |
974 | ||
e930bffe AA |
975 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
976 | { | |
977 | int err; | |
978 | kvm->mmu_notifier.ops = &kvm_mmu_notifier_ops; | |
979 | err = mmu_notifier_register(&kvm->mmu_notifier, current->mm); | |
980 | if (err) { | |
981 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
982 | put_page(page); | |
983 | #endif | |
984 | kfree(kvm); | |
985 | return ERR_PTR(err); | |
986 | } | |
987 | } | |
988 | #endif | |
989 | ||
6d4e4c4f AK |
990 | kvm->mm = current->mm; |
991 | atomic_inc(&kvm->mm->mm_count); | |
aaee2c94 | 992 | spin_lock_init(&kvm->mmu_lock); |
84261923 | 993 | spin_lock_init(&kvm->requests_lock); |
74906345 | 994 | kvm_io_bus_init(&kvm->pio_bus); |
d34e6b17 | 995 | kvm_eventfd_init(kvm); |
11ec2804 | 996 | mutex_init(&kvm->lock); |
60eead79 | 997 | mutex_init(&kvm->irq_lock); |
2eeb2e94 | 998 | kvm_io_bus_init(&kvm->mmio_bus); |
72dc67a6 | 999 | init_rwsem(&kvm->slots_lock); |
d39f13b0 | 1000 | atomic_set(&kvm->users_count, 1); |
5e58cfe4 RR |
1001 | spin_lock(&kvm_lock); |
1002 | list_add(&kvm->vm_list, &vm_list); | |
1003 | spin_unlock(&kvm_lock); | |
5f94c174 LV |
1004 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
1005 | kvm_coalesced_mmio_init(kvm); | |
1006 | #endif | |
d19a9cd2 | 1007 | out: |
f17abe9a AK |
1008 | return kvm; |
1009 | } | |
1010 | ||
6aa8b732 AK |
1011 | /* |
1012 | * Free any memory in @free but not in @dont. | |
1013 | */ | |
1014 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, | |
1015 | struct kvm_memory_slot *dont) | |
1016 | { | |
ec04b260 JR |
1017 | int i; |
1018 | ||
290fc38d IE |
1019 | if (!dont || free->rmap != dont->rmap) |
1020 | vfree(free->rmap); | |
6aa8b732 AK |
1021 | |
1022 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) | |
1023 | vfree(free->dirty_bitmap); | |
1024 | ||
ec04b260 JR |
1025 | |
1026 | for (i = 0; i < KVM_NR_PAGE_SIZES - 1; ++i) { | |
1027 | if (!dont || free->lpage_info[i] != dont->lpage_info[i]) { | |
1028 | vfree(free->lpage_info[i]); | |
1029 | free->lpage_info[i] = NULL; | |
1030 | } | |
1031 | } | |
05da4558 | 1032 | |
6aa8b732 | 1033 | free->npages = 0; |
8b6d44c7 | 1034 | free->dirty_bitmap = NULL; |
8d4e1288 | 1035 | free->rmap = NULL; |
6aa8b732 AK |
1036 | } |
1037 | ||
d19a9cd2 | 1038 | void kvm_free_physmem(struct kvm *kvm) |
6aa8b732 AK |
1039 | { |
1040 | int i; | |
1041 | ||
1042 | for (i = 0; i < kvm->nmemslots; ++i) | |
8b6d44c7 | 1043 | kvm_free_physmem_slot(&kvm->memslots[i], NULL); |
6aa8b732 AK |
1044 | } |
1045 | ||
f17abe9a AK |
1046 | static void kvm_destroy_vm(struct kvm *kvm) |
1047 | { | |
6d4e4c4f AK |
1048 | struct mm_struct *mm = kvm->mm; |
1049 | ||
ad8ba2cd | 1050 | kvm_arch_sync_events(kvm); |
133de902 AK |
1051 | spin_lock(&kvm_lock); |
1052 | list_del(&kvm->vm_list); | |
1053 | spin_unlock(&kvm_lock); | |
399ec807 | 1054 | kvm_free_irq_routing(kvm); |
74906345 | 1055 | kvm_io_bus_destroy(&kvm->pio_bus); |
2eeb2e94 | 1056 | kvm_io_bus_destroy(&kvm->mmio_bus); |
5f94c174 LV |
1057 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
1058 | if (kvm->coalesced_mmio_ring != NULL) | |
1059 | free_page((unsigned long)kvm->coalesced_mmio_ring); | |
e930bffe AA |
1060 | #endif |
1061 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) | |
1062 | mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm); | |
f00be0ca GN |
1063 | #else |
1064 | kvm_arch_flush_shadow(kvm); | |
5f94c174 | 1065 | #endif |
d19a9cd2 | 1066 | kvm_arch_destroy_vm(kvm); |
6d4e4c4f | 1067 | mmdrop(mm); |
f17abe9a AK |
1068 | } |
1069 | ||
d39f13b0 IE |
1070 | void kvm_get_kvm(struct kvm *kvm) |
1071 | { | |
1072 | atomic_inc(&kvm->users_count); | |
1073 | } | |
1074 | EXPORT_SYMBOL_GPL(kvm_get_kvm); | |
1075 | ||
1076 | void kvm_put_kvm(struct kvm *kvm) | |
1077 | { | |
1078 | if (atomic_dec_and_test(&kvm->users_count)) | |
1079 | kvm_destroy_vm(kvm); | |
1080 | } | |
1081 | EXPORT_SYMBOL_GPL(kvm_put_kvm); | |
1082 | ||
1083 | ||
f17abe9a AK |
1084 | static int kvm_vm_release(struct inode *inode, struct file *filp) |
1085 | { | |
1086 | struct kvm *kvm = filp->private_data; | |
1087 | ||
721eecbf GH |
1088 | kvm_irqfd_release(kvm); |
1089 | ||
d39f13b0 | 1090 | kvm_put_kvm(kvm); |
6aa8b732 AK |
1091 | return 0; |
1092 | } | |
1093 | ||
6aa8b732 AK |
1094 | /* |
1095 | * Allocate some memory and give it an address in the guest physical address | |
1096 | * space. | |
1097 | * | |
1098 | * Discontiguous memory is allowed, mostly for framebuffers. | |
f78e0e2e | 1099 | * |
10589a46 | 1100 | * Must be called holding mmap_sem for write. |
6aa8b732 | 1101 | */ |
f78e0e2e SY |
1102 | int __kvm_set_memory_region(struct kvm *kvm, |
1103 | struct kvm_userspace_memory_region *mem, | |
1104 | int user_alloc) | |
6aa8b732 AK |
1105 | { |
1106 | int r; | |
1107 | gfn_t base_gfn; | |
28bcb112 HC |
1108 | unsigned long npages; |
1109 | unsigned long i; | |
6aa8b732 AK |
1110 | struct kvm_memory_slot *memslot; |
1111 | struct kvm_memory_slot old, new; | |
6aa8b732 AK |
1112 | |
1113 | r = -EINVAL; | |
1114 | /* General sanity checks */ | |
1115 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
1116 | goto out; | |
1117 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) | |
1118 | goto out; | |
e7cacd40 | 1119 | if (user_alloc && (mem->userspace_addr & (PAGE_SIZE - 1))) |
78749809 | 1120 | goto out; |
e0d62c7f | 1121 | if (mem->slot >= KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS) |
6aa8b732 AK |
1122 | goto out; |
1123 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) | |
1124 | goto out; | |
1125 | ||
1126 | memslot = &kvm->memslots[mem->slot]; | |
1127 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; | |
1128 | npages = mem->memory_size >> PAGE_SHIFT; | |
1129 | ||
1130 | if (!npages) | |
1131 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; | |
1132 | ||
6aa8b732 AK |
1133 | new = old = *memslot; |
1134 | ||
1135 | new.base_gfn = base_gfn; | |
1136 | new.npages = npages; | |
1137 | new.flags = mem->flags; | |
1138 | ||
1139 | /* Disallow changing a memory slot's size. */ | |
1140 | r = -EINVAL; | |
1141 | if (npages && old.npages && npages != old.npages) | |
f78e0e2e | 1142 | goto out_free; |
6aa8b732 AK |
1143 | |
1144 | /* Check for overlaps */ | |
1145 | r = -EEXIST; | |
1146 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
1147 | struct kvm_memory_slot *s = &kvm->memslots[i]; | |
1148 | ||
4cd481f6 | 1149 | if (s == memslot || !s->npages) |
6aa8b732 AK |
1150 | continue; |
1151 | if (!((base_gfn + npages <= s->base_gfn) || | |
1152 | (base_gfn >= s->base_gfn + s->npages))) | |
f78e0e2e | 1153 | goto out_free; |
6aa8b732 | 1154 | } |
6aa8b732 | 1155 | |
6aa8b732 AK |
1156 | /* Free page dirty bitmap if unneeded */ |
1157 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8b6d44c7 | 1158 | new.dirty_bitmap = NULL; |
6aa8b732 AK |
1159 | |
1160 | r = -ENOMEM; | |
1161 | ||
1162 | /* Allocate if a slot is being created */ | |
eff0114a | 1163 | #ifndef CONFIG_S390 |
8d4e1288 | 1164 | if (npages && !new.rmap) { |
d77c26fc | 1165 | new.rmap = vmalloc(npages * sizeof(struct page *)); |
290fc38d IE |
1166 | |
1167 | if (!new.rmap) | |
f78e0e2e | 1168 | goto out_free; |
290fc38d | 1169 | |
290fc38d | 1170 | memset(new.rmap, 0, npages * sizeof(*new.rmap)); |
8d4e1288 | 1171 | |
80b14b5b | 1172 | new.user_alloc = user_alloc; |
604b38ac AA |
1173 | /* |
1174 | * hva_to_rmmap() serialzies with the mmu_lock and to be | |
1175 | * safe it has to ignore memslots with !user_alloc && | |
1176 | * !userspace_addr. | |
1177 | */ | |
1178 | if (user_alloc) | |
1179 | new.userspace_addr = mem->userspace_addr; | |
1180 | else | |
1181 | new.userspace_addr = 0; | |
6aa8b732 | 1182 | } |
ec04b260 JR |
1183 | if (!npages) |
1184 | goto skip_lpage; | |
05da4558 | 1185 | |
ec04b260 | 1186 | for (i = 0; i < KVM_NR_PAGE_SIZES - 1; ++i) { |
28bcb112 HC |
1187 | unsigned long ugfn; |
1188 | unsigned long j; | |
1189 | int lpages; | |
ec04b260 | 1190 | int level = i + 2; |
05da4558 | 1191 | |
ec04b260 JR |
1192 | /* Avoid unused variable warning if no large pages */ |
1193 | (void)level; | |
1194 | ||
1195 | if (new.lpage_info[i]) | |
1196 | continue; | |
1197 | ||
1198 | lpages = 1 + (base_gfn + npages - 1) / | |
1199 | KVM_PAGES_PER_HPAGE(level); | |
1200 | lpages -= base_gfn / KVM_PAGES_PER_HPAGE(level); | |
1201 | ||
1202 | new.lpage_info[i] = vmalloc(lpages * sizeof(*new.lpage_info[i])); | |
1203 | ||
1204 | if (!new.lpage_info[i]) | |
05da4558 MT |
1205 | goto out_free; |
1206 | ||
ec04b260 JR |
1207 | memset(new.lpage_info[i], 0, |
1208 | lpages * sizeof(*new.lpage_info[i])); | |
05da4558 | 1209 | |
ec04b260 JR |
1210 | if (base_gfn % KVM_PAGES_PER_HPAGE(level)) |
1211 | new.lpage_info[i][0].write_count = 1; | |
1212 | if ((base_gfn+npages) % KVM_PAGES_PER_HPAGE(level)) | |
1213 | new.lpage_info[i][lpages - 1].write_count = 1; | |
ac04527f AK |
1214 | ugfn = new.userspace_addr >> PAGE_SHIFT; |
1215 | /* | |
1216 | * If the gfn and userspace address are not aligned wrt each | |
54dee993 MT |
1217 | * other, or if explicitly asked to, disable large page |
1218 | * support for this slot | |
ac04527f | 1219 | */ |
ec04b260 | 1220 | if ((base_gfn ^ ugfn) & (KVM_PAGES_PER_HPAGE(level) - 1) || |
54dee993 | 1221 | !largepages_enabled) |
ec04b260 JR |
1222 | for (j = 0; j < lpages; ++j) |
1223 | new.lpage_info[i][j].write_count = 1; | |
05da4558 | 1224 | } |
6aa8b732 | 1225 | |
ec04b260 JR |
1226 | skip_lpage: |
1227 | ||
6aa8b732 AK |
1228 | /* Allocate page dirty bitmap if needed */ |
1229 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { | |
1230 | unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8; | |
1231 | ||
1232 | new.dirty_bitmap = vmalloc(dirty_bytes); | |
1233 | if (!new.dirty_bitmap) | |
f78e0e2e | 1234 | goto out_free; |
6aa8b732 | 1235 | memset(new.dirty_bitmap, 0, dirty_bytes); |
e244584f IE |
1236 | if (old.npages) |
1237 | kvm_arch_flush_shadow(kvm); | |
6aa8b732 | 1238 | } |
3eea8437 CB |
1239 | #else /* not defined CONFIG_S390 */ |
1240 | new.user_alloc = user_alloc; | |
1241 | if (user_alloc) | |
1242 | new.userspace_addr = mem->userspace_addr; | |
eff0114a | 1243 | #endif /* not defined CONFIG_S390 */ |
6aa8b732 | 1244 | |
34d4cb8f MT |
1245 | if (!npages) |
1246 | kvm_arch_flush_shadow(kvm); | |
1247 | ||
604b38ac AA |
1248 | spin_lock(&kvm->mmu_lock); |
1249 | if (mem->slot >= kvm->nmemslots) | |
1250 | kvm->nmemslots = mem->slot + 1; | |
1251 | ||
3ad82a7e | 1252 | *memslot = new; |
604b38ac | 1253 | spin_unlock(&kvm->mmu_lock); |
3ad82a7e | 1254 | |
0de10343 ZX |
1255 | r = kvm_arch_set_memory_region(kvm, mem, old, user_alloc); |
1256 | if (r) { | |
604b38ac | 1257 | spin_lock(&kvm->mmu_lock); |
0de10343 | 1258 | *memslot = old; |
604b38ac | 1259 | spin_unlock(&kvm->mmu_lock); |
0de10343 | 1260 | goto out_free; |
82ce2c96 IE |
1261 | } |
1262 | ||
6f897248 GC |
1263 | kvm_free_physmem_slot(&old, npages ? &new : NULL); |
1264 | /* Slot deletion case: we have to update the current slot */ | |
b43b1901 | 1265 | spin_lock(&kvm->mmu_lock); |
6f897248 GC |
1266 | if (!npages) |
1267 | *memslot = old; | |
b43b1901 | 1268 | spin_unlock(&kvm->mmu_lock); |
8a98f664 | 1269 | #ifdef CONFIG_DMAR |
62c476c7 BAY |
1270 | /* map the pages in iommu page table */ |
1271 | r = kvm_iommu_map_pages(kvm, base_gfn, npages); | |
1272 | if (r) | |
1273 | goto out; | |
8a98f664 | 1274 | #endif |
6aa8b732 AK |
1275 | return 0; |
1276 | ||
f78e0e2e | 1277 | out_free: |
6aa8b732 AK |
1278 | kvm_free_physmem_slot(&new, &old); |
1279 | out: | |
1280 | return r; | |
210c7c4d IE |
1281 | |
1282 | } | |
f78e0e2e SY |
1283 | EXPORT_SYMBOL_GPL(__kvm_set_memory_region); |
1284 | ||
1285 | int kvm_set_memory_region(struct kvm *kvm, | |
1286 | struct kvm_userspace_memory_region *mem, | |
1287 | int user_alloc) | |
1288 | { | |
1289 | int r; | |
1290 | ||
72dc67a6 | 1291 | down_write(&kvm->slots_lock); |
f78e0e2e | 1292 | r = __kvm_set_memory_region(kvm, mem, user_alloc); |
72dc67a6 | 1293 | up_write(&kvm->slots_lock); |
f78e0e2e SY |
1294 | return r; |
1295 | } | |
210c7c4d IE |
1296 | EXPORT_SYMBOL_GPL(kvm_set_memory_region); |
1297 | ||
1fe779f8 CO |
1298 | int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
1299 | struct | |
1300 | kvm_userspace_memory_region *mem, | |
1301 | int user_alloc) | |
210c7c4d | 1302 | { |
e0d62c7f IE |
1303 | if (mem->slot >= KVM_MEMORY_SLOTS) |
1304 | return -EINVAL; | |
210c7c4d | 1305 | return kvm_set_memory_region(kvm, mem, user_alloc); |
6aa8b732 AK |
1306 | } |
1307 | ||
5bb064dc ZX |
1308 | int kvm_get_dirty_log(struct kvm *kvm, |
1309 | struct kvm_dirty_log *log, int *is_dirty) | |
6aa8b732 AK |
1310 | { |
1311 | struct kvm_memory_slot *memslot; | |
1312 | int r, i; | |
1313 | int n; | |
1314 | unsigned long any = 0; | |
1315 | ||
6aa8b732 AK |
1316 | r = -EINVAL; |
1317 | if (log->slot >= KVM_MEMORY_SLOTS) | |
1318 | goto out; | |
1319 | ||
1320 | memslot = &kvm->memslots[log->slot]; | |
1321 | r = -ENOENT; | |
1322 | if (!memslot->dirty_bitmap) | |
1323 | goto out; | |
1324 | ||
cd1a4a98 | 1325 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
6aa8b732 | 1326 | |
cd1a4a98 | 1327 | for (i = 0; !any && i < n/sizeof(long); ++i) |
6aa8b732 AK |
1328 | any = memslot->dirty_bitmap[i]; |
1329 | ||
1330 | r = -EFAULT; | |
1331 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
1332 | goto out; | |
1333 | ||
5bb064dc ZX |
1334 | if (any) |
1335 | *is_dirty = 1; | |
6aa8b732 AK |
1336 | |
1337 | r = 0; | |
6aa8b732 | 1338 | out: |
6aa8b732 AK |
1339 | return r; |
1340 | } | |
1341 | ||
54dee993 MT |
1342 | void kvm_disable_largepages(void) |
1343 | { | |
1344 | largepages_enabled = false; | |
1345 | } | |
1346 | EXPORT_SYMBOL_GPL(kvm_disable_largepages); | |
1347 | ||
cea7bb21 IE |
1348 | int is_error_page(struct page *page) |
1349 | { | |
1350 | return page == bad_page; | |
1351 | } | |
1352 | EXPORT_SYMBOL_GPL(is_error_page); | |
1353 | ||
35149e21 AL |
1354 | int is_error_pfn(pfn_t pfn) |
1355 | { | |
1356 | return pfn == bad_pfn; | |
1357 | } | |
1358 | EXPORT_SYMBOL_GPL(is_error_pfn); | |
1359 | ||
f9d46eb0 IE |
1360 | static inline unsigned long bad_hva(void) |
1361 | { | |
1362 | return PAGE_OFFSET; | |
1363 | } | |
1364 | ||
1365 | int kvm_is_error_hva(unsigned long addr) | |
1366 | { | |
1367 | return addr == bad_hva(); | |
1368 | } | |
1369 | EXPORT_SYMBOL_GPL(kvm_is_error_hva); | |
1370 | ||
2843099f | 1371 | struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn) |
6aa8b732 AK |
1372 | { |
1373 | int i; | |
1374 | ||
1375 | for (i = 0; i < kvm->nmemslots; ++i) { | |
1376 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
1377 | ||
1378 | if (gfn >= memslot->base_gfn | |
1379 | && gfn < memslot->base_gfn + memslot->npages) | |
1380 | return memslot; | |
1381 | } | |
8b6d44c7 | 1382 | return NULL; |
6aa8b732 | 1383 | } |
2843099f | 1384 | EXPORT_SYMBOL_GPL(gfn_to_memslot_unaliased); |
e8207547 AK |
1385 | |
1386 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
1387 | { | |
1388 | gfn = unalias_gfn(kvm, gfn); | |
2843099f | 1389 | return gfn_to_memslot_unaliased(kvm, gfn); |
e8207547 | 1390 | } |
6aa8b732 | 1391 | |
e0d62c7f IE |
1392 | int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn) |
1393 | { | |
1394 | int i; | |
1395 | ||
1396 | gfn = unalias_gfn(kvm, gfn); | |
1397 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
1398 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
1399 | ||
1400 | if (gfn >= memslot->base_gfn | |
1401 | && gfn < memslot->base_gfn + memslot->npages) | |
1402 | return 1; | |
1403 | } | |
1404 | return 0; | |
1405 | } | |
1406 | EXPORT_SYMBOL_GPL(kvm_is_visible_gfn); | |
1407 | ||
05da4558 | 1408 | unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn) |
539cb660 IE |
1409 | { |
1410 | struct kvm_memory_slot *slot; | |
1411 | ||
1412 | gfn = unalias_gfn(kvm, gfn); | |
2843099f | 1413 | slot = gfn_to_memslot_unaliased(kvm, gfn); |
539cb660 IE |
1414 | if (!slot) |
1415 | return bad_hva(); | |
1416 | return (slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE); | |
1417 | } | |
0d150298 | 1418 | EXPORT_SYMBOL_GPL(gfn_to_hva); |
539cb660 | 1419 | |
35149e21 | 1420 | pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn) |
954bbbc2 | 1421 | { |
8d4e1288 | 1422 | struct page *page[1]; |
539cb660 | 1423 | unsigned long addr; |
8d4e1288 | 1424 | int npages; |
2e2e3738 | 1425 | pfn_t pfn; |
954bbbc2 | 1426 | |
60395224 AK |
1427 | might_sleep(); |
1428 | ||
539cb660 IE |
1429 | addr = gfn_to_hva(kvm, gfn); |
1430 | if (kvm_is_error_hva(addr)) { | |
8a7ae055 | 1431 | get_page(bad_page); |
35149e21 | 1432 | return page_to_pfn(bad_page); |
8a7ae055 | 1433 | } |
8d4e1288 | 1434 | |
4c2155ce | 1435 | npages = get_user_pages_fast(addr, 1, 1, page); |
539cb660 | 1436 | |
2e2e3738 AL |
1437 | if (unlikely(npages != 1)) { |
1438 | struct vm_area_struct *vma; | |
1439 | ||
4c2155ce | 1440 | down_read(¤t->mm->mmap_sem); |
2e2e3738 | 1441 | vma = find_vma(current->mm, addr); |
4c2155ce | 1442 | |
2e2e3738 AL |
1443 | if (vma == NULL || addr < vma->vm_start || |
1444 | !(vma->vm_flags & VM_PFNMAP)) { | |
4c2155ce | 1445 | up_read(¤t->mm->mmap_sem); |
2e2e3738 AL |
1446 | get_page(bad_page); |
1447 | return page_to_pfn(bad_page); | |
1448 | } | |
1449 | ||
1450 | pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; | |
4c2155ce | 1451 | up_read(¤t->mm->mmap_sem); |
c77fb9dc | 1452 | BUG_ON(!kvm_is_mmio_pfn(pfn)); |
2e2e3738 AL |
1453 | } else |
1454 | pfn = page_to_pfn(page[0]); | |
8d4e1288 | 1455 | |
2e2e3738 | 1456 | return pfn; |
35149e21 AL |
1457 | } |
1458 | ||
1459 | EXPORT_SYMBOL_GPL(gfn_to_pfn); | |
1460 | ||
1461 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) | |
1462 | { | |
2e2e3738 AL |
1463 | pfn_t pfn; |
1464 | ||
1465 | pfn = gfn_to_pfn(kvm, gfn); | |
c77fb9dc | 1466 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 AL |
1467 | return pfn_to_page(pfn); |
1468 | ||
c77fb9dc | 1469 | WARN_ON(kvm_is_mmio_pfn(pfn)); |
2e2e3738 AL |
1470 | |
1471 | get_page(bad_page); | |
1472 | return bad_page; | |
954bbbc2 | 1473 | } |
aab61cc0 | 1474 | |
954bbbc2 AK |
1475 | EXPORT_SYMBOL_GPL(gfn_to_page); |
1476 | ||
b4231d61 IE |
1477 | void kvm_release_page_clean(struct page *page) |
1478 | { | |
35149e21 | 1479 | kvm_release_pfn_clean(page_to_pfn(page)); |
b4231d61 IE |
1480 | } |
1481 | EXPORT_SYMBOL_GPL(kvm_release_page_clean); | |
1482 | ||
35149e21 AL |
1483 | void kvm_release_pfn_clean(pfn_t pfn) |
1484 | { | |
c77fb9dc | 1485 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 | 1486 | put_page(pfn_to_page(pfn)); |
35149e21 AL |
1487 | } |
1488 | EXPORT_SYMBOL_GPL(kvm_release_pfn_clean); | |
1489 | ||
b4231d61 | 1490 | void kvm_release_page_dirty(struct page *page) |
8a7ae055 | 1491 | { |
35149e21 AL |
1492 | kvm_release_pfn_dirty(page_to_pfn(page)); |
1493 | } | |
1494 | EXPORT_SYMBOL_GPL(kvm_release_page_dirty); | |
1495 | ||
1496 | void kvm_release_pfn_dirty(pfn_t pfn) | |
1497 | { | |
1498 | kvm_set_pfn_dirty(pfn); | |
1499 | kvm_release_pfn_clean(pfn); | |
1500 | } | |
1501 | EXPORT_SYMBOL_GPL(kvm_release_pfn_dirty); | |
1502 | ||
1503 | void kvm_set_page_dirty(struct page *page) | |
1504 | { | |
1505 | kvm_set_pfn_dirty(page_to_pfn(page)); | |
1506 | } | |
1507 | EXPORT_SYMBOL_GPL(kvm_set_page_dirty); | |
1508 | ||
1509 | void kvm_set_pfn_dirty(pfn_t pfn) | |
1510 | { | |
c77fb9dc | 1511 | if (!kvm_is_mmio_pfn(pfn)) { |
2e2e3738 AL |
1512 | struct page *page = pfn_to_page(pfn); |
1513 | if (!PageReserved(page)) | |
1514 | SetPageDirty(page); | |
1515 | } | |
8a7ae055 | 1516 | } |
35149e21 AL |
1517 | EXPORT_SYMBOL_GPL(kvm_set_pfn_dirty); |
1518 | ||
1519 | void kvm_set_pfn_accessed(pfn_t pfn) | |
1520 | { | |
c77fb9dc | 1521 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 | 1522 | mark_page_accessed(pfn_to_page(pfn)); |
35149e21 AL |
1523 | } |
1524 | EXPORT_SYMBOL_GPL(kvm_set_pfn_accessed); | |
1525 | ||
1526 | void kvm_get_pfn(pfn_t pfn) | |
1527 | { | |
c77fb9dc | 1528 | if (!kvm_is_mmio_pfn(pfn)) |
2e2e3738 | 1529 | get_page(pfn_to_page(pfn)); |
35149e21 AL |
1530 | } |
1531 | EXPORT_SYMBOL_GPL(kvm_get_pfn); | |
8a7ae055 | 1532 | |
195aefde IE |
1533 | static int next_segment(unsigned long len, int offset) |
1534 | { | |
1535 | if (len > PAGE_SIZE - offset) | |
1536 | return PAGE_SIZE - offset; | |
1537 | else | |
1538 | return len; | |
1539 | } | |
1540 | ||
1541 | int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, | |
1542 | int len) | |
1543 | { | |
e0506bcb IE |
1544 | int r; |
1545 | unsigned long addr; | |
195aefde | 1546 | |
e0506bcb IE |
1547 | addr = gfn_to_hva(kvm, gfn); |
1548 | if (kvm_is_error_hva(addr)) | |
1549 | return -EFAULT; | |
1550 | r = copy_from_user(data, (void __user *)addr + offset, len); | |
1551 | if (r) | |
195aefde | 1552 | return -EFAULT; |
195aefde IE |
1553 | return 0; |
1554 | } | |
1555 | EXPORT_SYMBOL_GPL(kvm_read_guest_page); | |
1556 | ||
1557 | int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len) | |
1558 | { | |
1559 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1560 | int seg; | |
1561 | int offset = offset_in_page(gpa); | |
1562 | int ret; | |
1563 | ||
1564 | while ((seg = next_segment(len, offset)) != 0) { | |
1565 | ret = kvm_read_guest_page(kvm, gfn, data, offset, seg); | |
1566 | if (ret < 0) | |
1567 | return ret; | |
1568 | offset = 0; | |
1569 | len -= seg; | |
1570 | data += seg; | |
1571 | ++gfn; | |
1572 | } | |
1573 | return 0; | |
1574 | } | |
1575 | EXPORT_SYMBOL_GPL(kvm_read_guest); | |
1576 | ||
7ec54588 MT |
1577 | int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, |
1578 | unsigned long len) | |
1579 | { | |
1580 | int r; | |
1581 | unsigned long addr; | |
1582 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1583 | int offset = offset_in_page(gpa); | |
1584 | ||
1585 | addr = gfn_to_hva(kvm, gfn); | |
1586 | if (kvm_is_error_hva(addr)) | |
1587 | return -EFAULT; | |
0aac03f0 | 1588 | pagefault_disable(); |
7ec54588 | 1589 | r = __copy_from_user_inatomic(data, (void __user *)addr + offset, len); |
0aac03f0 | 1590 | pagefault_enable(); |
7ec54588 MT |
1591 | if (r) |
1592 | return -EFAULT; | |
1593 | return 0; | |
1594 | } | |
1595 | EXPORT_SYMBOL(kvm_read_guest_atomic); | |
1596 | ||
195aefde IE |
1597 | int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, |
1598 | int offset, int len) | |
1599 | { | |
e0506bcb IE |
1600 | int r; |
1601 | unsigned long addr; | |
195aefde | 1602 | |
e0506bcb IE |
1603 | addr = gfn_to_hva(kvm, gfn); |
1604 | if (kvm_is_error_hva(addr)) | |
1605 | return -EFAULT; | |
1606 | r = copy_to_user((void __user *)addr + offset, data, len); | |
1607 | if (r) | |
195aefde | 1608 | return -EFAULT; |
195aefde IE |
1609 | mark_page_dirty(kvm, gfn); |
1610 | return 0; | |
1611 | } | |
1612 | EXPORT_SYMBOL_GPL(kvm_write_guest_page); | |
1613 | ||
1614 | int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, | |
1615 | unsigned long len) | |
1616 | { | |
1617 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1618 | int seg; | |
1619 | int offset = offset_in_page(gpa); | |
1620 | int ret; | |
1621 | ||
1622 | while ((seg = next_segment(len, offset)) != 0) { | |
1623 | ret = kvm_write_guest_page(kvm, gfn, data, offset, seg); | |
1624 | if (ret < 0) | |
1625 | return ret; | |
1626 | offset = 0; | |
1627 | len -= seg; | |
1628 | data += seg; | |
1629 | ++gfn; | |
1630 | } | |
1631 | return 0; | |
1632 | } | |
1633 | ||
1634 | int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len) | |
1635 | { | |
3e021bf5 | 1636 | return kvm_write_guest_page(kvm, gfn, empty_zero_page, offset, len); |
195aefde IE |
1637 | } |
1638 | EXPORT_SYMBOL_GPL(kvm_clear_guest_page); | |
1639 | ||
1640 | int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len) | |
1641 | { | |
1642 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1643 | int seg; | |
1644 | int offset = offset_in_page(gpa); | |
1645 | int ret; | |
1646 | ||
1647 | while ((seg = next_segment(len, offset)) != 0) { | |
1648 | ret = kvm_clear_guest_page(kvm, gfn, offset, seg); | |
1649 | if (ret < 0) | |
1650 | return ret; | |
1651 | offset = 0; | |
1652 | len -= seg; | |
1653 | ++gfn; | |
1654 | } | |
1655 | return 0; | |
1656 | } | |
1657 | EXPORT_SYMBOL_GPL(kvm_clear_guest); | |
1658 | ||
6aa8b732 AK |
1659 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
1660 | { | |
31389947 | 1661 | struct kvm_memory_slot *memslot; |
6aa8b732 | 1662 | |
3b6fff19 | 1663 | gfn = unalias_gfn(kvm, gfn); |
2843099f | 1664 | memslot = gfn_to_memslot_unaliased(kvm, gfn); |
7e9d619d RR |
1665 | if (memslot && memslot->dirty_bitmap) { |
1666 | unsigned long rel_gfn = gfn - memslot->base_gfn; | |
6aa8b732 | 1667 | |
7e9d619d | 1668 | /* avoid RMW */ |
c8240bd6 AG |
1669 | if (!generic_test_le_bit(rel_gfn, memslot->dirty_bitmap)) |
1670 | generic___set_le_bit(rel_gfn, memslot->dirty_bitmap); | |
6aa8b732 AK |
1671 | } |
1672 | } | |
1673 | ||
b6958ce4 ED |
1674 | /* |
1675 | * The vCPU has executed a HLT instruction with in-kernel mode enabled. | |
1676 | */ | |
8776e519 | 1677 | void kvm_vcpu_block(struct kvm_vcpu *vcpu) |
d3bef15f | 1678 | { |
e5c239cf MT |
1679 | DEFINE_WAIT(wait); |
1680 | ||
1681 | for (;;) { | |
1682 | prepare_to_wait(&vcpu->wq, &wait, TASK_INTERRUPTIBLE); | |
1683 | ||
a1b37100 | 1684 | if (kvm_arch_vcpu_runnable(vcpu)) { |
d7690175 | 1685 | set_bit(KVM_REQ_UNHALT, &vcpu->requests); |
e5c239cf | 1686 | break; |
d7690175 | 1687 | } |
09cec754 GN |
1688 | if (kvm_cpu_has_pending_timer(vcpu)) |
1689 | break; | |
e5c239cf MT |
1690 | if (signal_pending(current)) |
1691 | break; | |
1692 | ||
b6958ce4 ED |
1693 | vcpu_put(vcpu); |
1694 | schedule(); | |
1695 | vcpu_load(vcpu); | |
1696 | } | |
d3bef15f | 1697 | |
e5c239cf | 1698 | finish_wait(&vcpu->wq, &wait); |
b6958ce4 ED |
1699 | } |
1700 | ||
6aa8b732 AK |
1701 | void kvm_resched(struct kvm_vcpu *vcpu) |
1702 | { | |
3fca0365 YD |
1703 | if (!need_resched()) |
1704 | return; | |
6aa8b732 | 1705 | cond_resched(); |
6aa8b732 AK |
1706 | } |
1707 | EXPORT_SYMBOL_GPL(kvm_resched); | |
1708 | ||
e4a533a4 | 1709 | static int kvm_vcpu_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
9a2bb7f4 AK |
1710 | { |
1711 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; | |
9a2bb7f4 AK |
1712 | struct page *page; |
1713 | ||
e4a533a4 | 1714 | if (vmf->pgoff == 0) |
039576c0 | 1715 | page = virt_to_page(vcpu->run); |
09566765 | 1716 | #ifdef CONFIG_X86 |
e4a533a4 | 1717 | else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET) |
ad312c7c | 1718 | page = virt_to_page(vcpu->arch.pio_data); |
5f94c174 LV |
1719 | #endif |
1720 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
1721 | else if (vmf->pgoff == KVM_COALESCED_MMIO_PAGE_OFFSET) | |
1722 | page = virt_to_page(vcpu->kvm->coalesced_mmio_ring); | |
09566765 | 1723 | #endif |
039576c0 | 1724 | else |
e4a533a4 | 1725 | return VM_FAULT_SIGBUS; |
9a2bb7f4 | 1726 | get_page(page); |
e4a533a4 | 1727 | vmf->page = page; |
1728 | return 0; | |
9a2bb7f4 AK |
1729 | } |
1730 | ||
f0f37e2f | 1731 | static const struct vm_operations_struct kvm_vcpu_vm_ops = { |
e4a533a4 | 1732 | .fault = kvm_vcpu_fault, |
9a2bb7f4 AK |
1733 | }; |
1734 | ||
1735 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) | |
1736 | { | |
1737 | vma->vm_ops = &kvm_vcpu_vm_ops; | |
1738 | return 0; | |
1739 | } | |
1740 | ||
bccf2150 AK |
1741 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
1742 | { | |
1743 | struct kvm_vcpu *vcpu = filp->private_data; | |
1744 | ||
66c0b394 | 1745 | kvm_put_kvm(vcpu->kvm); |
bccf2150 AK |
1746 | return 0; |
1747 | } | |
1748 | ||
3d3aab1b | 1749 | static struct file_operations kvm_vcpu_fops = { |
bccf2150 AK |
1750 | .release = kvm_vcpu_release, |
1751 | .unlocked_ioctl = kvm_vcpu_ioctl, | |
1752 | .compat_ioctl = kvm_vcpu_ioctl, | |
9a2bb7f4 | 1753 | .mmap = kvm_vcpu_mmap, |
bccf2150 AK |
1754 | }; |
1755 | ||
1756 | /* | |
1757 | * Allocates an inode for the vcpu. | |
1758 | */ | |
1759 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) | |
1760 | { | |
73880c80 | 1761 | return anon_inode_getfd("kvm-vcpu", &kvm_vcpu_fops, vcpu, 0); |
bccf2150 AK |
1762 | } |
1763 | ||
c5ea7660 AK |
1764 | /* |
1765 | * Creates some virtual cpus. Good luck creating more than one. | |
1766 | */ | |
73880c80 | 1767 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id) |
c5ea7660 AK |
1768 | { |
1769 | int r; | |
988a2cae | 1770 | struct kvm_vcpu *vcpu, *v; |
c5ea7660 | 1771 | |
73880c80 | 1772 | vcpu = kvm_arch_vcpu_create(kvm, id); |
fb3f0f51 RR |
1773 | if (IS_ERR(vcpu)) |
1774 | return PTR_ERR(vcpu); | |
c5ea7660 | 1775 | |
15ad7146 AK |
1776 | preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops); |
1777 | ||
26e5215f AK |
1778 | r = kvm_arch_vcpu_setup(vcpu); |
1779 | if (r) | |
7d8fece6 | 1780 | return r; |
26e5215f | 1781 | |
11ec2804 | 1782 | mutex_lock(&kvm->lock); |
73880c80 GN |
1783 | if (atomic_read(&kvm->online_vcpus) == KVM_MAX_VCPUS) { |
1784 | r = -EINVAL; | |
e9b11c17 | 1785 | goto vcpu_destroy; |
fb3f0f51 | 1786 | } |
73880c80 | 1787 | |
988a2cae GN |
1788 | kvm_for_each_vcpu(r, v, kvm) |
1789 | if (v->vcpu_id == id) { | |
73880c80 GN |
1790 | r = -EEXIST; |
1791 | goto vcpu_destroy; | |
1792 | } | |
1793 | ||
1794 | BUG_ON(kvm->vcpus[atomic_read(&kvm->online_vcpus)]); | |
c5ea7660 | 1795 | |
fb3f0f51 | 1796 | /* Now it's all set up, let userspace reach it */ |
66c0b394 | 1797 | kvm_get_kvm(kvm); |
bccf2150 | 1798 | r = create_vcpu_fd(vcpu); |
73880c80 GN |
1799 | if (r < 0) { |
1800 | kvm_put_kvm(kvm); | |
1801 | goto vcpu_destroy; | |
1802 | } | |
1803 | ||
1804 | kvm->vcpus[atomic_read(&kvm->online_vcpus)] = vcpu; | |
1805 | smp_wmb(); | |
1806 | atomic_inc(&kvm->online_vcpus); | |
1807 | ||
1808 | #ifdef CONFIG_KVM_APIC_ARCHITECTURE | |
1809 | if (kvm->bsp_vcpu_id == id) | |
1810 | kvm->bsp_vcpu = vcpu; | |
1811 | #endif | |
1812 | mutex_unlock(&kvm->lock); | |
fb3f0f51 | 1813 | return r; |
39c3b86e | 1814 | |
e9b11c17 | 1815 | vcpu_destroy: |
7d8fece6 | 1816 | mutex_unlock(&kvm->lock); |
d40ccc62 | 1817 | kvm_arch_vcpu_destroy(vcpu); |
c5ea7660 AK |
1818 | return r; |
1819 | } | |
1820 | ||
1961d276 AK |
1821 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
1822 | { | |
1823 | if (sigset) { | |
1824 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1825 | vcpu->sigset_active = 1; | |
1826 | vcpu->sigset = *sigset; | |
1827 | } else | |
1828 | vcpu->sigset_active = 0; | |
1829 | return 0; | |
1830 | } | |
1831 | ||
c1e01514 SY |
1832 | #ifdef __KVM_HAVE_MSIX |
1833 | static int kvm_vm_ioctl_set_msix_nr(struct kvm *kvm, | |
1834 | struct kvm_assigned_msix_nr *entry_nr) | |
1835 | { | |
1836 | int r = 0; | |
1837 | struct kvm_assigned_dev_kernel *adev; | |
1838 | ||
1839 | mutex_lock(&kvm->lock); | |
1840 | ||
1841 | adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
1842 | entry_nr->assigned_dev_id); | |
1843 | if (!adev) { | |
1844 | r = -EINVAL; | |
1845 | goto msix_nr_out; | |
1846 | } | |
1847 | ||
1848 | if (adev->entries_nr == 0) { | |
1849 | adev->entries_nr = entry_nr->entry_nr; | |
1850 | if (adev->entries_nr == 0 || | |
1851 | adev->entries_nr >= KVM_MAX_MSIX_PER_DEV) { | |
1852 | r = -EINVAL; | |
1853 | goto msix_nr_out; | |
1854 | } | |
1855 | ||
1856 | adev->host_msix_entries = kzalloc(sizeof(struct msix_entry) * | |
1857 | entry_nr->entry_nr, | |
1858 | GFP_KERNEL); | |
1859 | if (!adev->host_msix_entries) { | |
1860 | r = -ENOMEM; | |
1861 | goto msix_nr_out; | |
1862 | } | |
1863 | adev->guest_msix_entries = kzalloc( | |
1864 | sizeof(struct kvm_guest_msix_entry) * | |
1865 | entry_nr->entry_nr, GFP_KERNEL); | |
1866 | if (!adev->guest_msix_entries) { | |
1867 | kfree(adev->host_msix_entries); | |
1868 | r = -ENOMEM; | |
1869 | goto msix_nr_out; | |
1870 | } | |
1871 | } else /* Not allowed set MSI-X number twice */ | |
1872 | r = -EINVAL; | |
1873 | msix_nr_out: | |
1874 | mutex_unlock(&kvm->lock); | |
1875 | return r; | |
1876 | } | |
1877 | ||
1878 | static int kvm_vm_ioctl_set_msix_entry(struct kvm *kvm, | |
1879 | struct kvm_assigned_msix_entry *entry) | |
1880 | { | |
1881 | int r = 0, i; | |
1882 | struct kvm_assigned_dev_kernel *adev; | |
1883 | ||
1884 | mutex_lock(&kvm->lock); | |
1885 | ||
1886 | adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, | |
1887 | entry->assigned_dev_id); | |
1888 | ||
1889 | if (!adev) { | |
1890 | r = -EINVAL; | |
1891 | goto msix_entry_out; | |
1892 | } | |
1893 | ||
1894 | for (i = 0; i < adev->entries_nr; i++) | |
1895 | if (adev->guest_msix_entries[i].vector == 0 || | |
1896 | adev->guest_msix_entries[i].entry == entry->entry) { | |
1897 | adev->guest_msix_entries[i].entry = entry->entry; | |
1898 | adev->guest_msix_entries[i].vector = entry->gsi; | |
1899 | adev->host_msix_entries[i].entry = entry->entry; | |
1900 | break; | |
1901 | } | |
1902 | if (i == adev->entries_nr) { | |
1903 | r = -ENOSPC; | |
1904 | goto msix_entry_out; | |
1905 | } | |
1906 | ||
1907 | msix_entry_out: | |
1908 | mutex_unlock(&kvm->lock); | |
1909 | ||
1910 | return r; | |
1911 | } | |
1912 | #endif | |
1913 | ||
bccf2150 AK |
1914 | static long kvm_vcpu_ioctl(struct file *filp, |
1915 | unsigned int ioctl, unsigned long arg) | |
6aa8b732 | 1916 | { |
bccf2150 | 1917 | struct kvm_vcpu *vcpu = filp->private_data; |
2f366987 | 1918 | void __user *argp = (void __user *)arg; |
313a3dc7 | 1919 | int r; |
fa3795a7 DH |
1920 | struct kvm_fpu *fpu = NULL; |
1921 | struct kvm_sregs *kvm_sregs = NULL; | |
6aa8b732 | 1922 | |
6d4e4c4f AK |
1923 | if (vcpu->kvm->mm != current->mm) |
1924 | return -EIO; | |
6aa8b732 | 1925 | switch (ioctl) { |
9a2bb7f4 | 1926 | case KVM_RUN: |
f0fe5108 AK |
1927 | r = -EINVAL; |
1928 | if (arg) | |
1929 | goto out; | |
b6c7a5dc | 1930 | r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run); |
6aa8b732 | 1931 | break; |
6aa8b732 | 1932 | case KVM_GET_REGS: { |
3e4bb3ac | 1933 | struct kvm_regs *kvm_regs; |
6aa8b732 | 1934 | |
3e4bb3ac XZ |
1935 | r = -ENOMEM; |
1936 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); | |
1937 | if (!kvm_regs) | |
6aa8b732 | 1938 | goto out; |
3e4bb3ac XZ |
1939 | r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs); |
1940 | if (r) | |
1941 | goto out_free1; | |
6aa8b732 | 1942 | r = -EFAULT; |
3e4bb3ac XZ |
1943 | if (copy_to_user(argp, kvm_regs, sizeof(struct kvm_regs))) |
1944 | goto out_free1; | |
6aa8b732 | 1945 | r = 0; |
3e4bb3ac XZ |
1946 | out_free1: |
1947 | kfree(kvm_regs); | |
6aa8b732 AK |
1948 | break; |
1949 | } | |
1950 | case KVM_SET_REGS: { | |
3e4bb3ac | 1951 | struct kvm_regs *kvm_regs; |
6aa8b732 | 1952 | |
3e4bb3ac XZ |
1953 | r = -ENOMEM; |
1954 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); | |
1955 | if (!kvm_regs) | |
6aa8b732 | 1956 | goto out; |
3e4bb3ac XZ |
1957 | r = -EFAULT; |
1958 | if (copy_from_user(kvm_regs, argp, sizeof(struct kvm_regs))) | |
1959 | goto out_free2; | |
1960 | r = kvm_arch_vcpu_ioctl_set_regs(vcpu, kvm_regs); | |
6aa8b732 | 1961 | if (r) |
3e4bb3ac | 1962 | goto out_free2; |
6aa8b732 | 1963 | r = 0; |
3e4bb3ac XZ |
1964 | out_free2: |
1965 | kfree(kvm_regs); | |
6aa8b732 AK |
1966 | break; |
1967 | } | |
1968 | case KVM_GET_SREGS: { | |
fa3795a7 DH |
1969 | kvm_sregs = kzalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
1970 | r = -ENOMEM; | |
1971 | if (!kvm_sregs) | |
1972 | goto out; | |
1973 | r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs); | |
6aa8b732 AK |
1974 | if (r) |
1975 | goto out; | |
1976 | r = -EFAULT; | |
fa3795a7 | 1977 | if (copy_to_user(argp, kvm_sregs, sizeof(struct kvm_sregs))) |
6aa8b732 AK |
1978 | goto out; |
1979 | r = 0; | |
1980 | break; | |
1981 | } | |
1982 | case KVM_SET_SREGS: { | |
fa3795a7 DH |
1983 | kvm_sregs = kmalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
1984 | r = -ENOMEM; | |
1985 | if (!kvm_sregs) | |
1986 | goto out; | |
6aa8b732 | 1987 | r = -EFAULT; |
fa3795a7 | 1988 | if (copy_from_user(kvm_sregs, argp, sizeof(struct kvm_sregs))) |
6aa8b732 | 1989 | goto out; |
fa3795a7 | 1990 | r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs); |
6aa8b732 AK |
1991 | if (r) |
1992 | goto out; | |
1993 | r = 0; | |
1994 | break; | |
1995 | } | |
62d9f0db MT |
1996 | case KVM_GET_MP_STATE: { |
1997 | struct kvm_mp_state mp_state; | |
1998 | ||
1999 | r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state); | |
2000 | if (r) | |
2001 | goto out; | |
2002 | r = -EFAULT; | |
2003 | if (copy_to_user(argp, &mp_state, sizeof mp_state)) | |
2004 | goto out; | |
2005 | r = 0; | |
2006 | break; | |
2007 | } | |
2008 | case KVM_SET_MP_STATE: { | |
2009 | struct kvm_mp_state mp_state; | |
2010 | ||
2011 | r = -EFAULT; | |
2012 | if (copy_from_user(&mp_state, argp, sizeof mp_state)) | |
2013 | goto out; | |
2014 | r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state); | |
2015 | if (r) | |
2016 | goto out; | |
2017 | r = 0; | |
2018 | break; | |
2019 | } | |
6aa8b732 AK |
2020 | case KVM_TRANSLATE: { |
2021 | struct kvm_translation tr; | |
2022 | ||
2023 | r = -EFAULT; | |
2f366987 | 2024 | if (copy_from_user(&tr, argp, sizeof tr)) |
6aa8b732 | 2025 | goto out; |
8b006791 | 2026 | r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr); |
6aa8b732 AK |
2027 | if (r) |
2028 | goto out; | |
2029 | r = -EFAULT; | |
2f366987 | 2030 | if (copy_to_user(argp, &tr, sizeof tr)) |
6aa8b732 AK |
2031 | goto out; |
2032 | r = 0; | |
2033 | break; | |
2034 | } | |
d0bfb940 JK |
2035 | case KVM_SET_GUEST_DEBUG: { |
2036 | struct kvm_guest_debug dbg; | |
6aa8b732 AK |
2037 | |
2038 | r = -EFAULT; | |
2f366987 | 2039 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
6aa8b732 | 2040 | goto out; |
d0bfb940 | 2041 | r = kvm_arch_vcpu_ioctl_set_guest_debug(vcpu, &dbg); |
6aa8b732 AK |
2042 | if (r) |
2043 | goto out; | |
2044 | r = 0; | |
2045 | break; | |
2046 | } | |
1961d276 AK |
2047 | case KVM_SET_SIGNAL_MASK: { |
2048 | struct kvm_signal_mask __user *sigmask_arg = argp; | |
2049 | struct kvm_signal_mask kvm_sigmask; | |
2050 | sigset_t sigset, *p; | |
2051 | ||
2052 | p = NULL; | |
2053 | if (argp) { | |
2054 | r = -EFAULT; | |
2055 | if (copy_from_user(&kvm_sigmask, argp, | |
2056 | sizeof kvm_sigmask)) | |
2057 | goto out; | |
2058 | r = -EINVAL; | |
2059 | if (kvm_sigmask.len != sizeof sigset) | |
2060 | goto out; | |
2061 | r = -EFAULT; | |
2062 | if (copy_from_user(&sigset, sigmask_arg->sigset, | |
2063 | sizeof sigset)) | |
2064 | goto out; | |
2065 | p = &sigset; | |
2066 | } | |
2067 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); | |
2068 | break; | |
2069 | } | |
b8836737 | 2070 | case KVM_GET_FPU: { |
fa3795a7 DH |
2071 | fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
2072 | r = -ENOMEM; | |
2073 | if (!fpu) | |
2074 | goto out; | |
2075 | r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, fpu); | |
b8836737 AK |
2076 | if (r) |
2077 | goto out; | |
2078 | r = -EFAULT; | |
fa3795a7 | 2079 | if (copy_to_user(argp, fpu, sizeof(struct kvm_fpu))) |
b8836737 AK |
2080 | goto out; |
2081 | r = 0; | |
2082 | break; | |
2083 | } | |
2084 | case KVM_SET_FPU: { | |
fa3795a7 DH |
2085 | fpu = kmalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
2086 | r = -ENOMEM; | |
2087 | if (!fpu) | |
2088 | goto out; | |
b8836737 | 2089 | r = -EFAULT; |
fa3795a7 | 2090 | if (copy_from_user(fpu, argp, sizeof(struct kvm_fpu))) |
b8836737 | 2091 | goto out; |
fa3795a7 | 2092 | r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu); |
b8836737 AK |
2093 | if (r) |
2094 | goto out; | |
2095 | r = 0; | |
2096 | break; | |
2097 | } | |
bccf2150 | 2098 | default: |
313a3dc7 | 2099 | r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
bccf2150 AK |
2100 | } |
2101 | out: | |
fa3795a7 DH |
2102 | kfree(fpu); |
2103 | kfree(kvm_sregs); | |
bccf2150 AK |
2104 | return r; |
2105 | } | |
2106 | ||
2107 | static long kvm_vm_ioctl(struct file *filp, | |
2108 | unsigned int ioctl, unsigned long arg) | |
2109 | { | |
2110 | struct kvm *kvm = filp->private_data; | |
2111 | void __user *argp = (void __user *)arg; | |
1fe779f8 | 2112 | int r; |
bccf2150 | 2113 | |
6d4e4c4f AK |
2114 | if (kvm->mm != current->mm) |
2115 | return -EIO; | |
bccf2150 AK |
2116 | switch (ioctl) { |
2117 | case KVM_CREATE_VCPU: | |
2118 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); | |
2119 | if (r < 0) | |
2120 | goto out; | |
2121 | break; | |
6fc138d2 IE |
2122 | case KVM_SET_USER_MEMORY_REGION: { |
2123 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
2124 | ||
2125 | r = -EFAULT; | |
2126 | if (copy_from_user(&kvm_userspace_mem, argp, | |
2127 | sizeof kvm_userspace_mem)) | |
2128 | goto out; | |
2129 | ||
2130 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1); | |
6aa8b732 AK |
2131 | if (r) |
2132 | goto out; | |
2133 | break; | |
2134 | } | |
2135 | case KVM_GET_DIRTY_LOG: { | |
2136 | struct kvm_dirty_log log; | |
2137 | ||
2138 | r = -EFAULT; | |
2f366987 | 2139 | if (copy_from_user(&log, argp, sizeof log)) |
6aa8b732 | 2140 | goto out; |
2c6f5df9 | 2141 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
6aa8b732 AK |
2142 | if (r) |
2143 | goto out; | |
2144 | break; | |
2145 | } | |
5f94c174 LV |
2146 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
2147 | case KVM_REGISTER_COALESCED_MMIO: { | |
2148 | struct kvm_coalesced_mmio_zone zone; | |
2149 | r = -EFAULT; | |
2150 | if (copy_from_user(&zone, argp, sizeof zone)) | |
2151 | goto out; | |
2152 | r = -ENXIO; | |
2153 | r = kvm_vm_ioctl_register_coalesced_mmio(kvm, &zone); | |
2154 | if (r) | |
2155 | goto out; | |
2156 | r = 0; | |
2157 | break; | |
2158 | } | |
2159 | case KVM_UNREGISTER_COALESCED_MMIO: { | |
2160 | struct kvm_coalesced_mmio_zone zone; | |
2161 | r = -EFAULT; | |
2162 | if (copy_from_user(&zone, argp, sizeof zone)) | |
2163 | goto out; | |
2164 | r = -ENXIO; | |
2165 | r = kvm_vm_ioctl_unregister_coalesced_mmio(kvm, &zone); | |
2166 | if (r) | |
2167 | goto out; | |
2168 | r = 0; | |
2169 | break; | |
2170 | } | |
8a98f664 XZ |
2171 | #endif |
2172 | #ifdef KVM_CAP_DEVICE_ASSIGNMENT | |
2173 | case KVM_ASSIGN_PCI_DEVICE: { | |
2174 | struct kvm_assigned_pci_dev assigned_dev; | |
2175 | ||
2176 | r = -EFAULT; | |
2177 | if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev)) | |
2178 | goto out; | |
2179 | r = kvm_vm_ioctl_assign_device(kvm, &assigned_dev); | |
2180 | if (r) | |
2181 | goto out; | |
2182 | break; | |
2183 | } | |
2184 | case KVM_ASSIGN_IRQ: { | |
e56d532f SY |
2185 | r = -EOPNOTSUPP; |
2186 | break; | |
2187 | } | |
2188 | #ifdef KVM_CAP_ASSIGN_DEV_IRQ | |
2189 | case KVM_ASSIGN_DEV_IRQ: { | |
8a98f664 XZ |
2190 | struct kvm_assigned_irq assigned_irq; |
2191 | ||
2192 | r = -EFAULT; | |
2193 | if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq)) | |
2194 | goto out; | |
2195 | r = kvm_vm_ioctl_assign_irq(kvm, &assigned_irq); | |
2196 | if (r) | |
2197 | goto out; | |
2198 | break; | |
2199 | } | |
e56d532f SY |
2200 | case KVM_DEASSIGN_DEV_IRQ: { |
2201 | struct kvm_assigned_irq assigned_irq; | |
2202 | ||
2203 | r = -EFAULT; | |
2204 | if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq)) | |
2205 | goto out; | |
2206 | r = kvm_vm_ioctl_deassign_dev_irq(kvm, &assigned_irq); | |
2207 | if (r) | |
2208 | goto out; | |
2209 | break; | |
2210 | } | |
2211 | #endif | |
0a920356 WH |
2212 | #endif |
2213 | #ifdef KVM_CAP_DEVICE_DEASSIGNMENT | |
2214 | case KVM_DEASSIGN_PCI_DEVICE: { | |
2215 | struct kvm_assigned_pci_dev assigned_dev; | |
2216 | ||
2217 | r = -EFAULT; | |
2218 | if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev)) | |
2219 | goto out; | |
2220 | r = kvm_vm_ioctl_deassign_device(kvm, &assigned_dev); | |
2221 | if (r) | |
2222 | goto out; | |
2223 | break; | |
2224 | } | |
399ec807 AK |
2225 | #endif |
2226 | #ifdef KVM_CAP_IRQ_ROUTING | |
2227 | case KVM_SET_GSI_ROUTING: { | |
2228 | struct kvm_irq_routing routing; | |
2229 | struct kvm_irq_routing __user *urouting; | |
2230 | struct kvm_irq_routing_entry *entries; | |
2231 | ||
2232 | r = -EFAULT; | |
2233 | if (copy_from_user(&routing, argp, sizeof(routing))) | |
2234 | goto out; | |
2235 | r = -EINVAL; | |
2236 | if (routing.nr >= KVM_MAX_IRQ_ROUTES) | |
2237 | goto out; | |
2238 | if (routing.flags) | |
2239 | goto out; | |
2240 | r = -ENOMEM; | |
2241 | entries = vmalloc(routing.nr * sizeof(*entries)); | |
2242 | if (!entries) | |
2243 | goto out; | |
2244 | r = -EFAULT; | |
2245 | urouting = argp; | |
2246 | if (copy_from_user(entries, urouting->entries, | |
2247 | routing.nr * sizeof(*entries))) | |
2248 | goto out_free_irq_routing; | |
2249 | r = kvm_set_irq_routing(kvm, entries, routing.nr, | |
2250 | routing.flags); | |
2251 | out_free_irq_routing: | |
2252 | vfree(entries); | |
2253 | break; | |
2254 | } | |
6621fbc2 | 2255 | #endif /* KVM_CAP_IRQ_ROUTING */ |
c1e01514 SY |
2256 | #ifdef __KVM_HAVE_MSIX |
2257 | case KVM_ASSIGN_SET_MSIX_NR: { | |
2258 | struct kvm_assigned_msix_nr entry_nr; | |
2259 | r = -EFAULT; | |
2260 | if (copy_from_user(&entry_nr, argp, sizeof entry_nr)) | |
2261 | goto out; | |
2262 | r = kvm_vm_ioctl_set_msix_nr(kvm, &entry_nr); | |
2263 | if (r) | |
2264 | goto out; | |
2265 | break; | |
2266 | } | |
2267 | case KVM_ASSIGN_SET_MSIX_ENTRY: { | |
2268 | struct kvm_assigned_msix_entry entry; | |
2269 | r = -EFAULT; | |
2270 | if (copy_from_user(&entry, argp, sizeof entry)) | |
2271 | goto out; | |
2272 | r = kvm_vm_ioctl_set_msix_entry(kvm, &entry); | |
2273 | if (r) | |
2274 | goto out; | |
2275 | break; | |
2276 | } | |
5f94c174 | 2277 | #endif |
721eecbf GH |
2278 | case KVM_IRQFD: { |
2279 | struct kvm_irqfd data; | |
2280 | ||
2281 | r = -EFAULT; | |
2282 | if (copy_from_user(&data, argp, sizeof data)) | |
2283 | goto out; | |
2284 | r = kvm_irqfd(kvm, data.fd, data.gsi, data.flags); | |
2285 | break; | |
2286 | } | |
d34e6b17 GH |
2287 | case KVM_IOEVENTFD: { |
2288 | struct kvm_ioeventfd data; | |
2289 | ||
2290 | r = -EFAULT; | |
2291 | if (copy_from_user(&data, argp, sizeof data)) | |
2292 | goto out; | |
2293 | r = kvm_ioeventfd(kvm, &data); | |
2294 | break; | |
2295 | } | |
73880c80 GN |
2296 | #ifdef CONFIG_KVM_APIC_ARCHITECTURE |
2297 | case KVM_SET_BOOT_CPU_ID: | |
2298 | r = 0; | |
894a9c55 | 2299 | mutex_lock(&kvm->lock); |
73880c80 GN |
2300 | if (atomic_read(&kvm->online_vcpus) != 0) |
2301 | r = -EBUSY; | |
2302 | else | |
2303 | kvm->bsp_vcpu_id = arg; | |
894a9c55 | 2304 | mutex_unlock(&kvm->lock); |
73880c80 GN |
2305 | break; |
2306 | #endif | |
f17abe9a | 2307 | default: |
1fe779f8 | 2308 | r = kvm_arch_vm_ioctl(filp, ioctl, arg); |
f17abe9a AK |
2309 | } |
2310 | out: | |
2311 | return r; | |
2312 | } | |
2313 | ||
e4a533a4 | 2314 | static int kvm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
f17abe9a | 2315 | { |
777b3f49 MT |
2316 | struct page *page[1]; |
2317 | unsigned long addr; | |
2318 | int npages; | |
2319 | gfn_t gfn = vmf->pgoff; | |
f17abe9a | 2320 | struct kvm *kvm = vma->vm_file->private_data; |
f17abe9a | 2321 | |
777b3f49 MT |
2322 | addr = gfn_to_hva(kvm, gfn); |
2323 | if (kvm_is_error_hva(addr)) | |
e4a533a4 | 2324 | return VM_FAULT_SIGBUS; |
777b3f49 MT |
2325 | |
2326 | npages = get_user_pages(current, current->mm, addr, 1, 1, 0, page, | |
2327 | NULL); | |
2328 | if (unlikely(npages != 1)) | |
e4a533a4 | 2329 | return VM_FAULT_SIGBUS; |
777b3f49 MT |
2330 | |
2331 | vmf->page = page[0]; | |
e4a533a4 | 2332 | return 0; |
f17abe9a AK |
2333 | } |
2334 | ||
f0f37e2f | 2335 | static const struct vm_operations_struct kvm_vm_vm_ops = { |
e4a533a4 | 2336 | .fault = kvm_vm_fault, |
f17abe9a AK |
2337 | }; |
2338 | ||
2339 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) | |
2340 | { | |
2341 | vma->vm_ops = &kvm_vm_vm_ops; | |
2342 | return 0; | |
2343 | } | |
2344 | ||
3d3aab1b | 2345 | static struct file_operations kvm_vm_fops = { |
f17abe9a AK |
2346 | .release = kvm_vm_release, |
2347 | .unlocked_ioctl = kvm_vm_ioctl, | |
2348 | .compat_ioctl = kvm_vm_ioctl, | |
2349 | .mmap = kvm_vm_mmap, | |
2350 | }; | |
2351 | ||
2352 | static int kvm_dev_ioctl_create_vm(void) | |
2353 | { | |
2030a42c | 2354 | int fd; |
f17abe9a AK |
2355 | struct kvm *kvm; |
2356 | ||
f17abe9a | 2357 | kvm = kvm_create_vm(); |
d6d28168 AK |
2358 | if (IS_ERR(kvm)) |
2359 | return PTR_ERR(kvm); | |
7d9dbca3 | 2360 | fd = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, 0); |
2030a42c | 2361 | if (fd < 0) |
66c0b394 | 2362 | kvm_put_kvm(kvm); |
f17abe9a | 2363 | |
f17abe9a | 2364 | return fd; |
f17abe9a AK |
2365 | } |
2366 | ||
1a811b61 AK |
2367 | static long kvm_dev_ioctl_check_extension_generic(long arg) |
2368 | { | |
2369 | switch (arg) { | |
ca9edaee | 2370 | case KVM_CAP_USER_MEMORY: |
1a811b61 | 2371 | case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: |
4cd481f6 | 2372 | case KVM_CAP_JOIN_MEMORY_REGIONS_WORKS: |
73880c80 GN |
2373 | #ifdef CONFIG_KVM_APIC_ARCHITECTURE |
2374 | case KVM_CAP_SET_BOOT_CPU_ID: | |
2375 | #endif | |
1a811b61 | 2376 | return 1; |
399ec807 AK |
2377 | #ifdef CONFIG_HAVE_KVM_IRQCHIP |
2378 | case KVM_CAP_IRQ_ROUTING: | |
36463146 | 2379 | return KVM_MAX_IRQ_ROUTES; |
399ec807 | 2380 | #endif |
1a811b61 AK |
2381 | default: |
2382 | break; | |
2383 | } | |
2384 | return kvm_dev_ioctl_check_extension(arg); | |
2385 | } | |
2386 | ||
f17abe9a AK |
2387 | static long kvm_dev_ioctl(struct file *filp, |
2388 | unsigned int ioctl, unsigned long arg) | |
2389 | { | |
07c45a36 | 2390 | long r = -EINVAL; |
f17abe9a AK |
2391 | |
2392 | switch (ioctl) { | |
2393 | case KVM_GET_API_VERSION: | |
f0fe5108 AK |
2394 | r = -EINVAL; |
2395 | if (arg) | |
2396 | goto out; | |
f17abe9a AK |
2397 | r = KVM_API_VERSION; |
2398 | break; | |
2399 | case KVM_CREATE_VM: | |
f0fe5108 AK |
2400 | r = -EINVAL; |
2401 | if (arg) | |
2402 | goto out; | |
f17abe9a AK |
2403 | r = kvm_dev_ioctl_create_vm(); |
2404 | break; | |
018d00d2 | 2405 | case KVM_CHECK_EXTENSION: |
1a811b61 | 2406 | r = kvm_dev_ioctl_check_extension_generic(arg); |
5d308f45 | 2407 | break; |
07c45a36 AK |
2408 | case KVM_GET_VCPU_MMAP_SIZE: |
2409 | r = -EINVAL; | |
2410 | if (arg) | |
2411 | goto out; | |
adb1ff46 AK |
2412 | r = PAGE_SIZE; /* struct kvm_run */ |
2413 | #ifdef CONFIG_X86 | |
2414 | r += PAGE_SIZE; /* pio data page */ | |
5f94c174 LV |
2415 | #endif |
2416 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET | |
2417 | r += PAGE_SIZE; /* coalesced mmio ring page */ | |
adb1ff46 | 2418 | #endif |
07c45a36 | 2419 | break; |
d4c9ff2d FEL |
2420 | case KVM_TRACE_ENABLE: |
2421 | case KVM_TRACE_PAUSE: | |
2422 | case KVM_TRACE_DISABLE: | |
2023a29c | 2423 | r = -EOPNOTSUPP; |
d4c9ff2d | 2424 | break; |
6aa8b732 | 2425 | default: |
043405e1 | 2426 | return kvm_arch_dev_ioctl(filp, ioctl, arg); |
6aa8b732 AK |
2427 | } |
2428 | out: | |
2429 | return r; | |
2430 | } | |
2431 | ||
6aa8b732 | 2432 | static struct file_operations kvm_chardev_ops = { |
6aa8b732 AK |
2433 | .unlocked_ioctl = kvm_dev_ioctl, |
2434 | .compat_ioctl = kvm_dev_ioctl, | |
6aa8b732 AK |
2435 | }; |
2436 | ||
2437 | static struct miscdevice kvm_dev = { | |
bbe4432e | 2438 | KVM_MINOR, |
6aa8b732 AK |
2439 | "kvm", |
2440 | &kvm_chardev_ops, | |
2441 | }; | |
2442 | ||
1b6c0168 AK |
2443 | static void hardware_enable(void *junk) |
2444 | { | |
2445 | int cpu = raw_smp_processor_id(); | |
2446 | ||
7f59f492 | 2447 | if (cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
1b6c0168 | 2448 | return; |
7f59f492 | 2449 | cpumask_set_cpu(cpu, cpus_hardware_enabled); |
e9b11c17 | 2450 | kvm_arch_hardware_enable(NULL); |
1b6c0168 AK |
2451 | } |
2452 | ||
2453 | static void hardware_disable(void *junk) | |
2454 | { | |
2455 | int cpu = raw_smp_processor_id(); | |
2456 | ||
7f59f492 | 2457 | if (!cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
1b6c0168 | 2458 | return; |
7f59f492 | 2459 | cpumask_clear_cpu(cpu, cpus_hardware_enabled); |
e9b11c17 | 2460 | kvm_arch_hardware_disable(NULL); |
1b6c0168 AK |
2461 | } |
2462 | ||
774c47f1 AK |
2463 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, |
2464 | void *v) | |
2465 | { | |
2466 | int cpu = (long)v; | |
2467 | ||
1a6f4d7f | 2468 | val &= ~CPU_TASKS_FROZEN; |
774c47f1 | 2469 | switch (val) { |
cec9ad27 | 2470 | case CPU_DYING: |
6ec8a856 AK |
2471 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
2472 | cpu); | |
2473 | hardware_disable(NULL); | |
2474 | break; | |
774c47f1 | 2475 | case CPU_UP_CANCELED: |
43934a38 JK |
2476 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
2477 | cpu); | |
8691e5a8 | 2478 | smp_call_function_single(cpu, hardware_disable, NULL, 1); |
774c47f1 | 2479 | break; |
43934a38 JK |
2480 | case CPU_ONLINE: |
2481 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", | |
2482 | cpu); | |
8691e5a8 | 2483 | smp_call_function_single(cpu, hardware_enable, NULL, 1); |
774c47f1 AK |
2484 | break; |
2485 | } | |
2486 | return NOTIFY_OK; | |
2487 | } | |
2488 | ||
4ecac3fd AK |
2489 | |
2490 | asmlinkage void kvm_handle_fault_on_reboot(void) | |
2491 | { | |
2492 | if (kvm_rebooting) | |
2493 | /* spin while reset goes on */ | |
2494 | while (true) | |
2495 | ; | |
2496 | /* Fault while not rebooting. We want the trace. */ | |
2497 | BUG(); | |
2498 | } | |
2499 | EXPORT_SYMBOL_GPL(kvm_handle_fault_on_reboot); | |
2500 | ||
9a2b85c6 | 2501 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, |
d77c26fc | 2502 | void *v) |
9a2b85c6 | 2503 | { |
8e1c1815 SY |
2504 | /* |
2505 | * Some (well, at least mine) BIOSes hang on reboot if | |
2506 | * in vmx root mode. | |
2507 | * | |
2508 | * And Intel TXT required VMX off for all cpu when system shutdown. | |
2509 | */ | |
2510 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); | |
2511 | kvm_rebooting = true; | |
2512 | on_each_cpu(hardware_disable, NULL, 1); | |
9a2b85c6 RR |
2513 | return NOTIFY_OK; |
2514 | } | |
2515 | ||
2516 | static struct notifier_block kvm_reboot_notifier = { | |
2517 | .notifier_call = kvm_reboot, | |
2518 | .priority = 0, | |
2519 | }; | |
2520 | ||
2eeb2e94 GH |
2521 | void kvm_io_bus_init(struct kvm_io_bus *bus) |
2522 | { | |
2523 | memset(bus, 0, sizeof(*bus)); | |
2524 | } | |
2525 | ||
2526 | void kvm_io_bus_destroy(struct kvm_io_bus *bus) | |
2527 | { | |
2528 | int i; | |
2529 | ||
2530 | for (i = 0; i < bus->dev_count; i++) { | |
2531 | struct kvm_io_device *pos = bus->devs[i]; | |
2532 | ||
2533 | kvm_iodevice_destructor(pos); | |
2534 | } | |
2535 | } | |
2536 | ||
bda9020e MT |
2537 | /* kvm_io_bus_write - called under kvm->slots_lock */ |
2538 | int kvm_io_bus_write(struct kvm_io_bus *bus, gpa_t addr, | |
2539 | int len, const void *val) | |
2eeb2e94 GH |
2540 | { |
2541 | int i; | |
bda9020e MT |
2542 | for (i = 0; i < bus->dev_count; i++) |
2543 | if (!kvm_iodevice_write(bus->devs[i], addr, len, val)) | |
2544 | return 0; | |
2545 | return -EOPNOTSUPP; | |
2546 | } | |
2eeb2e94 | 2547 | |
bda9020e MT |
2548 | /* kvm_io_bus_read - called under kvm->slots_lock */ |
2549 | int kvm_io_bus_read(struct kvm_io_bus *bus, gpa_t addr, int len, void *val) | |
2550 | { | |
2551 | int i; | |
2552 | for (i = 0; i < bus->dev_count; i++) | |
2553 | if (!kvm_iodevice_read(bus->devs[i], addr, len, val)) | |
2554 | return 0; | |
2555 | return -EOPNOTSUPP; | |
2eeb2e94 GH |
2556 | } |
2557 | ||
090b7aff | 2558 | int kvm_io_bus_register_dev(struct kvm *kvm, struct kvm_io_bus *bus, |
6c474694 MT |
2559 | struct kvm_io_device *dev) |
2560 | { | |
090b7aff GH |
2561 | int ret; |
2562 | ||
6c474694 | 2563 | down_write(&kvm->slots_lock); |
090b7aff | 2564 | ret = __kvm_io_bus_register_dev(bus, dev); |
6c474694 | 2565 | up_write(&kvm->slots_lock); |
090b7aff GH |
2566 | |
2567 | return ret; | |
6c474694 MT |
2568 | } |
2569 | ||
2570 | /* An unlocked version. Caller must have write lock on slots_lock. */ | |
090b7aff GH |
2571 | int __kvm_io_bus_register_dev(struct kvm_io_bus *bus, |
2572 | struct kvm_io_device *dev) | |
2eeb2e94 | 2573 | { |
090b7aff GH |
2574 | if (bus->dev_count > NR_IOBUS_DEVS-1) |
2575 | return -ENOSPC; | |
2eeb2e94 GH |
2576 | |
2577 | bus->devs[bus->dev_count++] = dev; | |
090b7aff GH |
2578 | |
2579 | return 0; | |
2580 | } | |
2581 | ||
2582 | void kvm_io_bus_unregister_dev(struct kvm *kvm, | |
2583 | struct kvm_io_bus *bus, | |
2584 | struct kvm_io_device *dev) | |
2585 | { | |
2586 | down_write(&kvm->slots_lock); | |
2587 | __kvm_io_bus_unregister_dev(bus, dev); | |
2588 | up_write(&kvm->slots_lock); | |
2589 | } | |
2590 | ||
2591 | /* An unlocked version. Caller must have write lock on slots_lock. */ | |
2592 | void __kvm_io_bus_unregister_dev(struct kvm_io_bus *bus, | |
2593 | struct kvm_io_device *dev) | |
2594 | { | |
2595 | int i; | |
2596 | ||
2597 | for (i = 0; i < bus->dev_count; i++) | |
2598 | if (bus->devs[i] == dev) { | |
2599 | bus->devs[i] = bus->devs[--bus->dev_count]; | |
2600 | break; | |
2601 | } | |
2eeb2e94 GH |
2602 | } |
2603 | ||
774c47f1 AK |
2604 | static struct notifier_block kvm_cpu_notifier = { |
2605 | .notifier_call = kvm_cpu_hotplug, | |
2606 | .priority = 20, /* must be > scheduler priority */ | |
2607 | }; | |
2608 | ||
8b88b099 | 2609 | static int vm_stat_get(void *_offset, u64 *val) |
ba1389b7 AK |
2610 | { |
2611 | unsigned offset = (long)_offset; | |
ba1389b7 AK |
2612 | struct kvm *kvm; |
2613 | ||
8b88b099 | 2614 | *val = 0; |
ba1389b7 AK |
2615 | spin_lock(&kvm_lock); |
2616 | list_for_each_entry(kvm, &vm_list, vm_list) | |
8b88b099 | 2617 | *val += *(u32 *)((void *)kvm + offset); |
ba1389b7 | 2618 | spin_unlock(&kvm_lock); |
8b88b099 | 2619 | return 0; |
ba1389b7 AK |
2620 | } |
2621 | ||
2622 | DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n"); | |
2623 | ||
8b88b099 | 2624 | static int vcpu_stat_get(void *_offset, u64 *val) |
1165f5fe AK |
2625 | { |
2626 | unsigned offset = (long)_offset; | |
1165f5fe AK |
2627 | struct kvm *kvm; |
2628 | struct kvm_vcpu *vcpu; | |
2629 | int i; | |
2630 | ||
8b88b099 | 2631 | *val = 0; |
1165f5fe AK |
2632 | spin_lock(&kvm_lock); |
2633 | list_for_each_entry(kvm, &vm_list, vm_list) | |
988a2cae GN |
2634 | kvm_for_each_vcpu(i, vcpu, kvm) |
2635 | *val += *(u32 *)((void *)vcpu + offset); | |
2636 | ||
1165f5fe | 2637 | spin_unlock(&kvm_lock); |
8b88b099 | 2638 | return 0; |
1165f5fe AK |
2639 | } |
2640 | ||
ba1389b7 AK |
2641 | DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n"); |
2642 | ||
828c0950 | 2643 | static const struct file_operations *stat_fops[] = { |
ba1389b7 AK |
2644 | [KVM_STAT_VCPU] = &vcpu_stat_fops, |
2645 | [KVM_STAT_VM] = &vm_stat_fops, | |
2646 | }; | |
1165f5fe | 2647 | |
a16b043c | 2648 | static void kvm_init_debug(void) |
6aa8b732 AK |
2649 | { |
2650 | struct kvm_stats_debugfs_item *p; | |
2651 | ||
76f7c879 | 2652 | kvm_debugfs_dir = debugfs_create_dir("kvm", NULL); |
6aa8b732 | 2653 | for (p = debugfs_entries; p->name; ++p) |
76f7c879 | 2654 | p->dentry = debugfs_create_file(p->name, 0444, kvm_debugfs_dir, |
1165f5fe | 2655 | (void *)(long)p->offset, |
ba1389b7 | 2656 | stat_fops[p->kind]); |
6aa8b732 AK |
2657 | } |
2658 | ||
2659 | static void kvm_exit_debug(void) | |
2660 | { | |
2661 | struct kvm_stats_debugfs_item *p; | |
2662 | ||
2663 | for (p = debugfs_entries; p->name; ++p) | |
2664 | debugfs_remove(p->dentry); | |
76f7c879 | 2665 | debugfs_remove(kvm_debugfs_dir); |
6aa8b732 AK |
2666 | } |
2667 | ||
59ae6c6b AK |
2668 | static int kvm_suspend(struct sys_device *dev, pm_message_t state) |
2669 | { | |
4267c41a | 2670 | hardware_disable(NULL); |
59ae6c6b AK |
2671 | return 0; |
2672 | } | |
2673 | ||
2674 | static int kvm_resume(struct sys_device *dev) | |
2675 | { | |
4267c41a | 2676 | hardware_enable(NULL); |
59ae6c6b AK |
2677 | return 0; |
2678 | } | |
2679 | ||
2680 | static struct sysdev_class kvm_sysdev_class = { | |
af5ca3f4 | 2681 | .name = "kvm", |
59ae6c6b AK |
2682 | .suspend = kvm_suspend, |
2683 | .resume = kvm_resume, | |
2684 | }; | |
2685 | ||
2686 | static struct sys_device kvm_sysdev = { | |
2687 | .id = 0, | |
2688 | .cls = &kvm_sysdev_class, | |
2689 | }; | |
2690 | ||
cea7bb21 | 2691 | struct page *bad_page; |
35149e21 | 2692 | pfn_t bad_pfn; |
6aa8b732 | 2693 | |
15ad7146 AK |
2694 | static inline |
2695 | struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn) | |
2696 | { | |
2697 | return container_of(pn, struct kvm_vcpu, preempt_notifier); | |
2698 | } | |
2699 | ||
2700 | static void kvm_sched_in(struct preempt_notifier *pn, int cpu) | |
2701 | { | |
2702 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
2703 | ||
e9b11c17 | 2704 | kvm_arch_vcpu_load(vcpu, cpu); |
15ad7146 AK |
2705 | } |
2706 | ||
2707 | static void kvm_sched_out(struct preempt_notifier *pn, | |
2708 | struct task_struct *next) | |
2709 | { | |
2710 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
2711 | ||
e9b11c17 | 2712 | kvm_arch_vcpu_put(vcpu); |
15ad7146 AK |
2713 | } |
2714 | ||
f8c16bba | 2715 | int kvm_init(void *opaque, unsigned int vcpu_size, |
c16f862d | 2716 | struct module *module) |
6aa8b732 AK |
2717 | { |
2718 | int r; | |
002c7f7c | 2719 | int cpu; |
6aa8b732 | 2720 | |
f8c16bba ZX |
2721 | r = kvm_arch_init(opaque); |
2722 | if (r) | |
d2308784 | 2723 | goto out_fail; |
cb498ea2 ZX |
2724 | |
2725 | bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
2726 | ||
2727 | if (bad_page == NULL) { | |
2728 | r = -ENOMEM; | |
2729 | goto out; | |
2730 | } | |
2731 | ||
35149e21 AL |
2732 | bad_pfn = page_to_pfn(bad_page); |
2733 | ||
8437a617 | 2734 | if (!zalloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) { |
7f59f492 RR |
2735 | r = -ENOMEM; |
2736 | goto out_free_0; | |
2737 | } | |
2738 | ||
e9b11c17 | 2739 | r = kvm_arch_hardware_setup(); |
6aa8b732 | 2740 | if (r < 0) |
7f59f492 | 2741 | goto out_free_0a; |
6aa8b732 | 2742 | |
002c7f7c YS |
2743 | for_each_online_cpu(cpu) { |
2744 | smp_call_function_single(cpu, | |
e9b11c17 | 2745 | kvm_arch_check_processor_compat, |
8691e5a8 | 2746 | &r, 1); |
002c7f7c | 2747 | if (r < 0) |
d2308784 | 2748 | goto out_free_1; |
002c7f7c YS |
2749 | } |
2750 | ||
15c8b6c1 | 2751 | on_each_cpu(hardware_enable, NULL, 1); |
774c47f1 AK |
2752 | r = register_cpu_notifier(&kvm_cpu_notifier); |
2753 | if (r) | |
d2308784 | 2754 | goto out_free_2; |
6aa8b732 AK |
2755 | register_reboot_notifier(&kvm_reboot_notifier); |
2756 | ||
59ae6c6b AK |
2757 | r = sysdev_class_register(&kvm_sysdev_class); |
2758 | if (r) | |
d2308784 | 2759 | goto out_free_3; |
59ae6c6b AK |
2760 | |
2761 | r = sysdev_register(&kvm_sysdev); | |
2762 | if (r) | |
d2308784 | 2763 | goto out_free_4; |
59ae6c6b | 2764 | |
c16f862d RR |
2765 | /* A kmem cache lets us meet the alignment requirements of fx_save. */ |
2766 | kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, | |
56919c5c JP |
2767 | __alignof__(struct kvm_vcpu), |
2768 | 0, NULL); | |
c16f862d RR |
2769 | if (!kvm_vcpu_cache) { |
2770 | r = -ENOMEM; | |
d2308784 | 2771 | goto out_free_5; |
c16f862d RR |
2772 | } |
2773 | ||
6aa8b732 | 2774 | kvm_chardev_ops.owner = module; |
3d3aab1b CB |
2775 | kvm_vm_fops.owner = module; |
2776 | kvm_vcpu_fops.owner = module; | |
6aa8b732 AK |
2777 | |
2778 | r = misc_register(&kvm_dev); | |
2779 | if (r) { | |
d77c26fc | 2780 | printk(KERN_ERR "kvm: misc device register failed\n"); |
6aa8b732 AK |
2781 | goto out_free; |
2782 | } | |
2783 | ||
15ad7146 AK |
2784 | kvm_preempt_ops.sched_in = kvm_sched_in; |
2785 | kvm_preempt_ops.sched_out = kvm_sched_out; | |
2786 | ||
0ea4ed8e DW |
2787 | kvm_init_debug(); |
2788 | ||
c7addb90 | 2789 | return 0; |
6aa8b732 AK |
2790 | |
2791 | out_free: | |
c16f862d | 2792 | kmem_cache_destroy(kvm_vcpu_cache); |
d2308784 | 2793 | out_free_5: |
59ae6c6b | 2794 | sysdev_unregister(&kvm_sysdev); |
d2308784 | 2795 | out_free_4: |
59ae6c6b | 2796 | sysdev_class_unregister(&kvm_sysdev_class); |
d2308784 | 2797 | out_free_3: |
6aa8b732 | 2798 | unregister_reboot_notifier(&kvm_reboot_notifier); |
774c47f1 | 2799 | unregister_cpu_notifier(&kvm_cpu_notifier); |
d2308784 | 2800 | out_free_2: |
15c8b6c1 | 2801 | on_each_cpu(hardware_disable, NULL, 1); |
d2308784 | 2802 | out_free_1: |
e9b11c17 | 2803 | kvm_arch_hardware_unsetup(); |
7f59f492 RR |
2804 | out_free_0a: |
2805 | free_cpumask_var(cpus_hardware_enabled); | |
d2308784 ZX |
2806 | out_free_0: |
2807 | __free_page(bad_page); | |
ca45aaae | 2808 | out: |
f8c16bba | 2809 | kvm_arch_exit(); |
d2308784 | 2810 | out_fail: |
6aa8b732 AK |
2811 | return r; |
2812 | } | |
cb498ea2 | 2813 | EXPORT_SYMBOL_GPL(kvm_init); |
6aa8b732 | 2814 | |
cb498ea2 | 2815 | void kvm_exit(void) |
6aa8b732 | 2816 | { |
229456fc | 2817 | tracepoint_synchronize_unregister(); |
0ea4ed8e | 2818 | kvm_exit_debug(); |
6aa8b732 | 2819 | misc_deregister(&kvm_dev); |
c16f862d | 2820 | kmem_cache_destroy(kvm_vcpu_cache); |
59ae6c6b AK |
2821 | sysdev_unregister(&kvm_sysdev); |
2822 | sysdev_class_unregister(&kvm_sysdev_class); | |
6aa8b732 | 2823 | unregister_reboot_notifier(&kvm_reboot_notifier); |
59ae6c6b | 2824 | unregister_cpu_notifier(&kvm_cpu_notifier); |
15c8b6c1 | 2825 | on_each_cpu(hardware_disable, NULL, 1); |
e9b11c17 | 2826 | kvm_arch_hardware_unsetup(); |
f8c16bba | 2827 | kvm_arch_exit(); |
7f59f492 | 2828 | free_cpumask_var(cpus_hardware_enabled); |
cea7bb21 | 2829 | __free_page(bad_page); |
6aa8b732 | 2830 | } |
cb498ea2 | 2831 | EXPORT_SYMBOL_GPL(kvm_exit); |