eaf3a50f976947560ee9a9e4827cbe71d2879d11
[pandora-kernel.git] / virt / kvm / assigned-dev.c
1 /*
2  * Kernel-based Virtual Machine - device assignment support
3  *
4  * Copyright (C) 2010 Red Hat, Inc. and/or its affiliates.
5  *
6  * This work is licensed under the terms of the GNU GPL, version 2.  See
7  * the COPYING file in the top-level directory.
8  *
9  */
10
11 #include <linux/kvm_host.h>
12 #include <linux/kvm.h>
13 #include <linux/uaccess.h>
14 #include <linux/vmalloc.h>
15 #include <linux/errno.h>
16 #include <linux/spinlock.h>
17 #include <linux/pci.h>
18 #include <linux/interrupt.h>
19 #include <linux/slab.h>
20 #include "irq.h"
21
22 static struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head,
23                                                       int assigned_dev_id)
24 {
25         struct list_head *ptr;
26         struct kvm_assigned_dev_kernel *match;
27
28         list_for_each(ptr, head) {
29                 match = list_entry(ptr, struct kvm_assigned_dev_kernel, list);
30                 if (match->assigned_dev_id == assigned_dev_id)
31                         return match;
32         }
33         return NULL;
34 }
35
36 static int find_index_from_host_irq(struct kvm_assigned_dev_kernel
37                                     *assigned_dev, int irq)
38 {
39         int i, index;
40         struct msix_entry *host_msix_entries;
41
42         host_msix_entries = assigned_dev->host_msix_entries;
43
44         index = -1;
45         for (i = 0; i < assigned_dev->entries_nr; i++)
46                 if (irq == host_msix_entries[i].vector) {
47                         index = i;
48                         break;
49                 }
50         if (index < 0) {
51                 printk(KERN_WARNING "Fail to find correlated MSI-X entry!\n");
52                 return 0;
53         }
54
55         return index;
56 }
57
58 static irqreturn_t kvm_assigned_dev_thread(int irq, void *dev_id)
59 {
60         struct kvm_assigned_dev_kernel *assigned_dev = dev_id;
61         u32 vector;
62         int index;
63
64         if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_INTX) {
65                 spin_lock(&assigned_dev->intx_lock);
66                 disable_irq_nosync(irq);
67                 assigned_dev->host_irq_disabled = true;
68                 spin_unlock(&assigned_dev->intx_lock);
69         }
70
71         if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
72                 index = find_index_from_host_irq(assigned_dev, irq);
73                 if (index >= 0) {
74                         vector = assigned_dev->
75                                         guest_msix_entries[index].vector;
76                         kvm_set_irq(assigned_dev->kvm,
77                                     assigned_dev->irq_source_id, vector, 1);
78                 }
79         } else
80                 kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id,
81                             assigned_dev->guest_irq, 1);
82
83         return IRQ_HANDLED;
84 }
85
86 /* Ack the irq line for an assigned device */
87 static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian)
88 {
89         struct kvm_assigned_dev_kernel *dev;
90
91         if (kian->gsi == -1)
92                 return;
93
94         dev = container_of(kian, struct kvm_assigned_dev_kernel,
95                            ack_notifier);
96
97         kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0);
98
99         /* The guest irq may be shared so this ack may be
100          * from another device.
101          */
102         spin_lock(&dev->intx_lock);
103         if (dev->host_irq_disabled) {
104                 enable_irq(dev->host_irq);
105                 dev->host_irq_disabled = false;
106         }
107         spin_unlock(&dev->intx_lock);
108 }
109
110 static void deassign_guest_irq(struct kvm *kvm,
111                                struct kvm_assigned_dev_kernel *assigned_dev)
112 {
113         kvm_unregister_irq_ack_notifier(kvm, &assigned_dev->ack_notifier);
114         assigned_dev->ack_notifier.gsi = -1;
115
116         kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id,
117                     assigned_dev->guest_irq, 0);
118
119         if (assigned_dev->irq_source_id != -1)
120                 kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id);
121         assigned_dev->irq_source_id = -1;
122         assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_GUEST_MASK);
123 }
124
125 /* The function implicit hold kvm->lock mutex due to cancel_work_sync() */
126 static void deassign_host_irq(struct kvm *kvm,
127                               struct kvm_assigned_dev_kernel *assigned_dev)
128 {
129         /*
130          * We disable irq here to prevent further events.
131          *
132          * Notice this maybe result in nested disable if the interrupt type is
133          * INTx, but it's OK for we are going to free it.
134          *
135          * If this function is a part of VM destroy, please ensure that till
136          * now, the kvm state is still legal for probably we also have to wait
137          * on a currently running IRQ handler.
138          */
139         if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
140                 int i;
141                 for (i = 0; i < assigned_dev->entries_nr; i++)
142                         disable_irq(assigned_dev->host_msix_entries[i].vector);
143
144                 for (i = 0; i < assigned_dev->entries_nr; i++)
145                         free_irq(assigned_dev->host_msix_entries[i].vector,
146                                  (void *)assigned_dev);
147
148                 assigned_dev->entries_nr = 0;
149                 kfree(assigned_dev->host_msix_entries);
150                 kfree(assigned_dev->guest_msix_entries);
151                 pci_disable_msix(assigned_dev->dev);
152         } else {
153                 /* Deal with MSI and INTx */
154                 disable_irq(assigned_dev->host_irq);
155
156                 free_irq(assigned_dev->host_irq, (void *)assigned_dev);
157
158                 if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSI)
159                         pci_disable_msi(assigned_dev->dev);
160         }
161
162         assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_HOST_MASK);
163 }
164
165 static int kvm_deassign_irq(struct kvm *kvm,
166                             struct kvm_assigned_dev_kernel *assigned_dev,
167                             unsigned long irq_requested_type)
168 {
169         unsigned long guest_irq_type, host_irq_type;
170
171         if (!irqchip_in_kernel(kvm))
172                 return -EINVAL;
173         /* no irq assignment to deassign */
174         if (!assigned_dev->irq_requested_type)
175                 return -ENXIO;
176
177         host_irq_type = irq_requested_type & KVM_DEV_IRQ_HOST_MASK;
178         guest_irq_type = irq_requested_type & KVM_DEV_IRQ_GUEST_MASK;
179
180         if (host_irq_type)
181                 deassign_host_irq(kvm, assigned_dev);
182         if (guest_irq_type)
183                 deassign_guest_irq(kvm, assigned_dev);
184
185         return 0;
186 }
187
188 static void kvm_free_assigned_irq(struct kvm *kvm,
189                                   struct kvm_assigned_dev_kernel *assigned_dev)
190 {
191         kvm_deassign_irq(kvm, assigned_dev, assigned_dev->irq_requested_type);
192 }
193
194 static void kvm_free_assigned_device(struct kvm *kvm,
195                                      struct kvm_assigned_dev_kernel
196                                      *assigned_dev)
197 {
198         kvm_free_assigned_irq(kvm, assigned_dev);
199
200         pci_reset_function(assigned_dev->dev);
201         if (pci_load_and_free_saved_state(assigned_dev->dev,
202                                           &assigned_dev->pci_saved_state))
203                 printk(KERN_INFO "%s: Couldn't reload %s saved state\n",
204                        __func__, dev_name(&assigned_dev->dev->dev));
205         else
206                 pci_restore_state(assigned_dev->dev);
207
208         assigned_dev->dev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
209
210         pci_release_regions(assigned_dev->dev);
211         pci_disable_device(assigned_dev->dev);
212         pci_dev_put(assigned_dev->dev);
213
214         list_del(&assigned_dev->list);
215         kfree(assigned_dev);
216 }
217
218 void kvm_free_all_assigned_devices(struct kvm *kvm)
219 {
220         struct list_head *ptr, *ptr2;
221         struct kvm_assigned_dev_kernel *assigned_dev;
222
223         list_for_each_safe(ptr, ptr2, &kvm->arch.assigned_dev_head) {
224                 assigned_dev = list_entry(ptr,
225                                           struct kvm_assigned_dev_kernel,
226                                           list);
227
228                 kvm_free_assigned_device(kvm, assigned_dev);
229         }
230 }
231
232 static int assigned_device_enable_host_intx(struct kvm *kvm,
233                                             struct kvm_assigned_dev_kernel *dev)
234 {
235         dev->host_irq = dev->dev->irq;
236         /* Even though this is PCI, we don't want to use shared
237          * interrupts. Sharing host devices with guest-assigned devices
238          * on the same interrupt line is not a happy situation: there
239          * are going to be long delays in accepting, acking, etc.
240          */
241         if (request_threaded_irq(dev->host_irq, NULL, kvm_assigned_dev_thread,
242                                  IRQF_ONESHOT, dev->irq_name, (void *)dev))
243                 return -EIO;
244         return 0;
245 }
246
247 #ifdef __KVM_HAVE_MSI
248 static int assigned_device_enable_host_msi(struct kvm *kvm,
249                                            struct kvm_assigned_dev_kernel *dev)
250 {
251         int r;
252
253         if (!dev->dev->msi_enabled) {
254                 r = pci_enable_msi(dev->dev);
255                 if (r)
256                         return r;
257         }
258
259         dev->host_irq = dev->dev->irq;
260         if (request_threaded_irq(dev->host_irq, NULL, kvm_assigned_dev_thread,
261                                  0, dev->irq_name, (void *)dev)) {
262                 pci_disable_msi(dev->dev);
263                 return -EIO;
264         }
265
266         return 0;
267 }
268 #endif
269
270 #ifdef __KVM_HAVE_MSIX
271 static int assigned_device_enable_host_msix(struct kvm *kvm,
272                                             struct kvm_assigned_dev_kernel *dev)
273 {
274         int i, r = -EINVAL;
275
276         /* host_msix_entries and guest_msix_entries should have been
277          * initialized */
278         if (dev->entries_nr == 0)
279                 return r;
280
281         r = pci_enable_msix(dev->dev, dev->host_msix_entries, dev->entries_nr);
282         if (r)
283                 return r;
284
285         for (i = 0; i < dev->entries_nr; i++) {
286                 r = request_threaded_irq(dev->host_msix_entries[i].vector,
287                                          NULL, kvm_assigned_dev_thread,
288                                          0, dev->irq_name, (void *)dev);
289                 if (r)
290                         goto err;
291         }
292
293         return 0;
294 err:
295         for (i -= 1; i >= 0; i--)
296                 free_irq(dev->host_msix_entries[i].vector, (void *)dev);
297         pci_disable_msix(dev->dev);
298         return r;
299 }
300
301 #endif
302
303 static int assigned_device_enable_guest_intx(struct kvm *kvm,
304                                 struct kvm_assigned_dev_kernel *dev,
305                                 struct kvm_assigned_irq *irq)
306 {
307         dev->guest_irq = irq->guest_irq;
308         dev->ack_notifier.gsi = irq->guest_irq;
309         return 0;
310 }
311
312 #ifdef __KVM_HAVE_MSI
313 static int assigned_device_enable_guest_msi(struct kvm *kvm,
314                         struct kvm_assigned_dev_kernel *dev,
315                         struct kvm_assigned_irq *irq)
316 {
317         dev->guest_irq = irq->guest_irq;
318         dev->ack_notifier.gsi = -1;
319         dev->host_irq_disabled = false;
320         return 0;
321 }
322 #endif
323
324 #ifdef __KVM_HAVE_MSIX
325 static int assigned_device_enable_guest_msix(struct kvm *kvm,
326                         struct kvm_assigned_dev_kernel *dev,
327                         struct kvm_assigned_irq *irq)
328 {
329         dev->guest_irq = irq->guest_irq;
330         dev->ack_notifier.gsi = -1;
331         dev->host_irq_disabled = false;
332         return 0;
333 }
334 #endif
335
336 static int assign_host_irq(struct kvm *kvm,
337                            struct kvm_assigned_dev_kernel *dev,
338                            __u32 host_irq_type)
339 {
340         int r = -EEXIST;
341
342         if (dev->irq_requested_type & KVM_DEV_IRQ_HOST_MASK)
343                 return r;
344
345         snprintf(dev->irq_name, sizeof(dev->irq_name), "kvm:%s",
346                  pci_name(dev->dev));
347
348         switch (host_irq_type) {
349         case KVM_DEV_IRQ_HOST_INTX:
350                 r = assigned_device_enable_host_intx(kvm, dev);
351                 break;
352 #ifdef __KVM_HAVE_MSI
353         case KVM_DEV_IRQ_HOST_MSI:
354                 r = assigned_device_enable_host_msi(kvm, dev);
355                 break;
356 #endif
357 #ifdef __KVM_HAVE_MSIX
358         case KVM_DEV_IRQ_HOST_MSIX:
359                 r = assigned_device_enable_host_msix(kvm, dev);
360                 break;
361 #endif
362         default:
363                 r = -EINVAL;
364         }
365
366         if (!r)
367                 dev->irq_requested_type |= host_irq_type;
368
369         return r;
370 }
371
372 static int assign_guest_irq(struct kvm *kvm,
373                             struct kvm_assigned_dev_kernel *dev,
374                             struct kvm_assigned_irq *irq,
375                             unsigned long guest_irq_type)
376 {
377         int id;
378         int r = -EEXIST;
379
380         if (dev->irq_requested_type & KVM_DEV_IRQ_GUEST_MASK)
381                 return r;
382
383         id = kvm_request_irq_source_id(kvm);
384         if (id < 0)
385                 return id;
386
387         dev->irq_source_id = id;
388
389         switch (guest_irq_type) {
390         case KVM_DEV_IRQ_GUEST_INTX:
391                 r = assigned_device_enable_guest_intx(kvm, dev, irq);
392                 break;
393 #ifdef __KVM_HAVE_MSI
394         case KVM_DEV_IRQ_GUEST_MSI:
395                 r = assigned_device_enable_guest_msi(kvm, dev, irq);
396                 break;
397 #endif
398 #ifdef __KVM_HAVE_MSIX
399         case KVM_DEV_IRQ_GUEST_MSIX:
400                 r = assigned_device_enable_guest_msix(kvm, dev, irq);
401                 break;
402 #endif
403         default:
404                 r = -EINVAL;
405         }
406
407         if (!r) {
408                 dev->irq_requested_type |= guest_irq_type;
409                 kvm_register_irq_ack_notifier(kvm, &dev->ack_notifier);
410         } else
411                 kvm_free_irq_source_id(kvm, dev->irq_source_id);
412
413         return r;
414 }
415
416 /* TODO Deal with KVM_DEV_IRQ_ASSIGNED_MASK_MSIX */
417 static int kvm_vm_ioctl_assign_irq(struct kvm *kvm,
418                                    struct kvm_assigned_irq *assigned_irq)
419 {
420         int r = -EINVAL;
421         struct kvm_assigned_dev_kernel *match;
422         unsigned long host_irq_type, guest_irq_type;
423
424         if (!irqchip_in_kernel(kvm))
425                 return r;
426
427         mutex_lock(&kvm->lock);
428         r = -ENODEV;
429         match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
430                                       assigned_irq->assigned_dev_id);
431         if (!match)
432                 goto out;
433
434         host_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_HOST_MASK);
435         guest_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_GUEST_MASK);
436
437         r = -EINVAL;
438         /* can only assign one type at a time */
439         if (hweight_long(host_irq_type) > 1)
440                 goto out;
441         if (hweight_long(guest_irq_type) > 1)
442                 goto out;
443         if (host_irq_type == 0 && guest_irq_type == 0)
444                 goto out;
445
446         r = 0;
447         if (host_irq_type)
448                 r = assign_host_irq(kvm, match, host_irq_type);
449         if (r)
450                 goto out;
451
452         if (guest_irq_type)
453                 r = assign_guest_irq(kvm, match, assigned_irq, guest_irq_type);
454 out:
455         mutex_unlock(&kvm->lock);
456         return r;
457 }
458
459 static int kvm_vm_ioctl_deassign_dev_irq(struct kvm *kvm,
460                                          struct kvm_assigned_irq
461                                          *assigned_irq)
462 {
463         int r = -ENODEV;
464         struct kvm_assigned_dev_kernel *match;
465
466         mutex_lock(&kvm->lock);
467
468         match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
469                                       assigned_irq->assigned_dev_id);
470         if (!match)
471                 goto out;
472
473         r = kvm_deassign_irq(kvm, match, assigned_irq->flags);
474 out:
475         mutex_unlock(&kvm->lock);
476         return r;
477 }
478
479 static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
480                                       struct kvm_assigned_pci_dev *assigned_dev)
481 {
482         int r = 0, idx;
483         struct kvm_assigned_dev_kernel *match;
484         struct pci_dev *dev;
485
486         mutex_lock(&kvm->lock);
487         idx = srcu_read_lock(&kvm->srcu);
488
489         match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
490                                       assigned_dev->assigned_dev_id);
491         if (match) {
492                 /* device already assigned */
493                 r = -EEXIST;
494                 goto out;
495         }
496
497         match = kzalloc(sizeof(struct kvm_assigned_dev_kernel), GFP_KERNEL);
498         if (match == NULL) {
499                 printk(KERN_INFO "%s: Couldn't allocate memory\n",
500                        __func__);
501                 r = -ENOMEM;
502                 goto out;
503         }
504         dev = pci_get_domain_bus_and_slot(assigned_dev->segnr,
505                                    assigned_dev->busnr,
506                                    assigned_dev->devfn);
507         if (!dev) {
508                 printk(KERN_INFO "%s: host device not found\n", __func__);
509                 r = -EINVAL;
510                 goto out_free;
511         }
512         if (pci_enable_device(dev)) {
513                 printk(KERN_INFO "%s: Could not enable PCI device\n", __func__);
514                 r = -EBUSY;
515                 goto out_put;
516         }
517         r = pci_request_regions(dev, "kvm_assigned_device");
518         if (r) {
519                 printk(KERN_INFO "%s: Could not get access to device regions\n",
520                        __func__);
521                 goto out_disable;
522         }
523
524         pci_reset_function(dev);
525         pci_save_state(dev);
526         match->pci_saved_state = pci_store_saved_state(dev);
527         if (!match->pci_saved_state)
528                 printk(KERN_DEBUG "%s: Couldn't store %s saved state\n",
529                        __func__, dev_name(&dev->dev));
530         match->assigned_dev_id = assigned_dev->assigned_dev_id;
531         match->host_segnr = assigned_dev->segnr;
532         match->host_busnr = assigned_dev->busnr;
533         match->host_devfn = assigned_dev->devfn;
534         match->flags = assigned_dev->flags;
535         match->dev = dev;
536         spin_lock_init(&match->intx_lock);
537         match->irq_source_id = -1;
538         match->kvm = kvm;
539         match->ack_notifier.irq_acked = kvm_assigned_dev_ack_irq;
540
541         list_add(&match->list, &kvm->arch.assigned_dev_head);
542
543         if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) {
544                 if (!kvm->arch.iommu_domain) {
545                         r = kvm_iommu_map_guest(kvm);
546                         if (r)
547                                 goto out_list_del;
548                 }
549                 r = kvm_assign_device(kvm, match);
550                 if (r)
551                         goto out_list_del;
552         }
553
554 out:
555         srcu_read_unlock(&kvm->srcu, idx);
556         mutex_unlock(&kvm->lock);
557         return r;
558 out_list_del:
559         if (pci_load_and_free_saved_state(dev, &match->pci_saved_state))
560                 printk(KERN_INFO "%s: Couldn't reload %s saved state\n",
561                        __func__, dev_name(&dev->dev));
562         list_del(&match->list);
563         pci_release_regions(dev);
564 out_disable:
565         pci_disable_device(dev);
566 out_put:
567         pci_dev_put(dev);
568 out_free:
569         kfree(match);
570         srcu_read_unlock(&kvm->srcu, idx);
571         mutex_unlock(&kvm->lock);
572         return r;
573 }
574
575 static int kvm_vm_ioctl_deassign_device(struct kvm *kvm,
576                 struct kvm_assigned_pci_dev *assigned_dev)
577 {
578         int r = 0;
579         struct kvm_assigned_dev_kernel *match;
580
581         mutex_lock(&kvm->lock);
582
583         match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
584                                       assigned_dev->assigned_dev_id);
585         if (!match) {
586                 printk(KERN_INFO "%s: device hasn't been assigned before, "
587                   "so cannot be deassigned\n", __func__);
588                 r = -EINVAL;
589                 goto out;
590         }
591
592         if (match->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU)
593                 kvm_deassign_device(kvm, match);
594
595         kvm_free_assigned_device(kvm, match);
596
597 out:
598         mutex_unlock(&kvm->lock);
599         return r;
600 }
601
602
603 #ifdef __KVM_HAVE_MSIX
604 static int kvm_vm_ioctl_set_msix_nr(struct kvm *kvm,
605                                     struct kvm_assigned_msix_nr *entry_nr)
606 {
607         int r = 0;
608         struct kvm_assigned_dev_kernel *adev;
609
610         mutex_lock(&kvm->lock);
611
612         adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
613                                       entry_nr->assigned_dev_id);
614         if (!adev) {
615                 r = -EINVAL;
616                 goto msix_nr_out;
617         }
618
619         if (adev->entries_nr == 0) {
620                 adev->entries_nr = entry_nr->entry_nr;
621                 if (adev->entries_nr == 0 ||
622                     adev->entries_nr > KVM_MAX_MSIX_PER_DEV) {
623                         r = -EINVAL;
624                         goto msix_nr_out;
625                 }
626
627                 adev->host_msix_entries = kzalloc(sizeof(struct msix_entry) *
628                                                 entry_nr->entry_nr,
629                                                 GFP_KERNEL);
630                 if (!adev->host_msix_entries) {
631                         r = -ENOMEM;
632                         goto msix_nr_out;
633                 }
634                 adev->guest_msix_entries =
635                         kzalloc(sizeof(struct msix_entry) * entry_nr->entry_nr,
636                                 GFP_KERNEL);
637                 if (!adev->guest_msix_entries) {
638                         kfree(adev->host_msix_entries);
639                         r = -ENOMEM;
640                         goto msix_nr_out;
641                 }
642         } else /* Not allowed set MSI-X number twice */
643                 r = -EINVAL;
644 msix_nr_out:
645         mutex_unlock(&kvm->lock);
646         return r;
647 }
648
649 static int kvm_vm_ioctl_set_msix_entry(struct kvm *kvm,
650                                        struct kvm_assigned_msix_entry *entry)
651 {
652         int r = 0, i;
653         struct kvm_assigned_dev_kernel *adev;
654
655         mutex_lock(&kvm->lock);
656
657         adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
658                                       entry->assigned_dev_id);
659
660         if (!adev) {
661                 r = -EINVAL;
662                 goto msix_entry_out;
663         }
664
665         for (i = 0; i < adev->entries_nr; i++)
666                 if (adev->guest_msix_entries[i].vector == 0 ||
667                     adev->guest_msix_entries[i].entry == entry->entry) {
668                         adev->guest_msix_entries[i].entry = entry->entry;
669                         adev->guest_msix_entries[i].vector = entry->gsi;
670                         adev->host_msix_entries[i].entry = entry->entry;
671                         break;
672                 }
673         if (i == adev->entries_nr) {
674                 r = -ENOSPC;
675                 goto msix_entry_out;
676         }
677
678 msix_entry_out:
679         mutex_unlock(&kvm->lock);
680
681         return r;
682 }
683 #endif
684
685 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
686                                   unsigned long arg)
687 {
688         void __user *argp = (void __user *)arg;
689         int r;
690
691         switch (ioctl) {
692         case KVM_ASSIGN_PCI_DEVICE: {
693                 struct kvm_assigned_pci_dev assigned_dev;
694
695                 r = -EFAULT;
696                 if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev))
697                         goto out;
698                 r = kvm_vm_ioctl_assign_device(kvm, &assigned_dev);
699                 if (r)
700                         goto out;
701                 break;
702         }
703         case KVM_ASSIGN_IRQ: {
704                 r = -EOPNOTSUPP;
705                 break;
706         }
707         case KVM_ASSIGN_DEV_IRQ: {
708                 struct kvm_assigned_irq assigned_irq;
709
710                 r = -EFAULT;
711                 if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq))
712                         goto out;
713                 r = kvm_vm_ioctl_assign_irq(kvm, &assigned_irq);
714                 if (r)
715                         goto out;
716                 break;
717         }
718         case KVM_DEASSIGN_DEV_IRQ: {
719                 struct kvm_assigned_irq assigned_irq;
720
721                 r = -EFAULT;
722                 if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq))
723                         goto out;
724                 r = kvm_vm_ioctl_deassign_dev_irq(kvm, &assigned_irq);
725                 if (r)
726                         goto out;
727                 break;
728         }
729         case KVM_DEASSIGN_PCI_DEVICE: {
730                 struct kvm_assigned_pci_dev assigned_dev;
731
732                 r = -EFAULT;
733                 if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev))
734                         goto out;
735                 r = kvm_vm_ioctl_deassign_device(kvm, &assigned_dev);
736                 if (r)
737                         goto out;
738                 break;
739         }
740 #ifdef KVM_CAP_IRQ_ROUTING
741         case KVM_SET_GSI_ROUTING: {
742                 struct kvm_irq_routing routing;
743                 struct kvm_irq_routing __user *urouting;
744                 struct kvm_irq_routing_entry *entries;
745
746                 r = -EFAULT;
747                 if (copy_from_user(&routing, argp, sizeof(routing)))
748                         goto out;
749                 r = -EINVAL;
750                 if (routing.nr >= KVM_MAX_IRQ_ROUTES)
751                         goto out;
752                 if (routing.flags)
753                         goto out;
754                 r = -ENOMEM;
755                 entries = vmalloc(routing.nr * sizeof(*entries));
756                 if (!entries)
757                         goto out;
758                 r = -EFAULT;
759                 urouting = argp;
760                 if (copy_from_user(entries, urouting->entries,
761                                    routing.nr * sizeof(*entries)))
762                         goto out_free_irq_routing;
763                 r = kvm_set_irq_routing(kvm, entries, routing.nr,
764                                         routing.flags);
765         out_free_irq_routing:
766                 vfree(entries);
767                 break;
768         }
769 #endif /* KVM_CAP_IRQ_ROUTING */
770 #ifdef __KVM_HAVE_MSIX
771         case KVM_ASSIGN_SET_MSIX_NR: {
772                 struct kvm_assigned_msix_nr entry_nr;
773                 r = -EFAULT;
774                 if (copy_from_user(&entry_nr, argp, sizeof entry_nr))
775                         goto out;
776                 r = kvm_vm_ioctl_set_msix_nr(kvm, &entry_nr);
777                 if (r)
778                         goto out;
779                 break;
780         }
781         case KVM_ASSIGN_SET_MSIX_ENTRY: {
782                 struct kvm_assigned_msix_entry entry;
783                 r = -EFAULT;
784                 if (copy_from_user(&entry, argp, sizeof entry))
785                         goto out;
786                 r = kvm_vm_ioctl_set_msix_entry(kvm, &entry);
787                 if (r)
788                         goto out;
789                 break;
790         }
791 #endif
792         default:
793                 r = -ENOTTY;
794                 break;
795         }
796 out:
797         return r;
798 }
799