KVM: Add compat ioctl for KVM_SET_SIGNAL_MASK
[linux-2.6.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         pci_release_regions(assigned_dev->dev);
209         pci_disable_device(assigned_dev->dev);
210         pci_dev_put(assigned_dev->dev);
211
212         list_del(&assigned_dev->list);
213         kfree(assigned_dev);
214 }
215
216 void kvm_free_all_assigned_devices(struct kvm *kvm)
217 {
218         struct list_head *ptr, *ptr2;
219         struct kvm_assigned_dev_kernel *assigned_dev;
220
221         list_for_each_safe(ptr, ptr2, &kvm->arch.assigned_dev_head) {
222                 assigned_dev = list_entry(ptr,
223                                           struct kvm_assigned_dev_kernel,
224                                           list);
225
226                 kvm_free_assigned_device(kvm, assigned_dev);
227         }
228 }
229
230 static int assigned_device_enable_host_intx(struct kvm *kvm,
231                                             struct kvm_assigned_dev_kernel *dev)
232 {
233         dev->host_irq = dev->dev->irq;
234         /* Even though this is PCI, we don't want to use shared
235          * interrupts. Sharing host devices with guest-assigned devices
236          * on the same interrupt line is not a happy situation: there
237          * are going to be long delays in accepting, acking, etc.
238          */
239         if (request_threaded_irq(dev->host_irq, NULL, kvm_assigned_dev_thread,
240                                  IRQF_ONESHOT, dev->irq_name, (void *)dev))
241                 return -EIO;
242         return 0;
243 }
244
245 #ifdef __KVM_HAVE_MSI
246 static int assigned_device_enable_host_msi(struct kvm *kvm,
247                                            struct kvm_assigned_dev_kernel *dev)
248 {
249         int r;
250
251         if (!dev->dev->msi_enabled) {
252                 r = pci_enable_msi(dev->dev);
253                 if (r)
254                         return r;
255         }
256
257         dev->host_irq = dev->dev->irq;
258         if (request_threaded_irq(dev->host_irq, NULL, kvm_assigned_dev_thread,
259                                  0, dev->irq_name, (void *)dev)) {
260                 pci_disable_msi(dev->dev);
261                 return -EIO;
262         }
263
264         return 0;
265 }
266 #endif
267
268 #ifdef __KVM_HAVE_MSIX
269 static int assigned_device_enable_host_msix(struct kvm *kvm,
270                                             struct kvm_assigned_dev_kernel *dev)
271 {
272         int i, r = -EINVAL;
273
274         /* host_msix_entries and guest_msix_entries should have been
275          * initialized */
276         if (dev->entries_nr == 0)
277                 return r;
278
279         r = pci_enable_msix(dev->dev, dev->host_msix_entries, dev->entries_nr);
280         if (r)
281                 return r;
282
283         for (i = 0; i < dev->entries_nr; i++) {
284                 r = request_threaded_irq(dev->host_msix_entries[i].vector,
285                                          NULL, kvm_assigned_dev_thread,
286                                          0, dev->irq_name, (void *)dev);
287                 if (r)
288                         goto err;
289         }
290
291         return 0;
292 err:
293         for (i -= 1; i >= 0; i--)
294                 free_irq(dev->host_msix_entries[i].vector, (void *)dev);
295         pci_disable_msix(dev->dev);
296         return r;
297 }
298
299 #endif
300
301 static int assigned_device_enable_guest_intx(struct kvm *kvm,
302                                 struct kvm_assigned_dev_kernel *dev,
303                                 struct kvm_assigned_irq *irq)
304 {
305         dev->guest_irq = irq->guest_irq;
306         dev->ack_notifier.gsi = irq->guest_irq;
307         return 0;
308 }
309
310 #ifdef __KVM_HAVE_MSI
311 static int assigned_device_enable_guest_msi(struct kvm *kvm,
312                         struct kvm_assigned_dev_kernel *dev,
313                         struct kvm_assigned_irq *irq)
314 {
315         dev->guest_irq = irq->guest_irq;
316         dev->ack_notifier.gsi = -1;
317         dev->host_irq_disabled = false;
318         return 0;
319 }
320 #endif
321
322 #ifdef __KVM_HAVE_MSIX
323 static int assigned_device_enable_guest_msix(struct kvm *kvm,
324                         struct kvm_assigned_dev_kernel *dev,
325                         struct kvm_assigned_irq *irq)
326 {
327         dev->guest_irq = irq->guest_irq;
328         dev->ack_notifier.gsi = -1;
329         dev->host_irq_disabled = false;
330         return 0;
331 }
332 #endif
333
334 static int assign_host_irq(struct kvm *kvm,
335                            struct kvm_assigned_dev_kernel *dev,
336                            __u32 host_irq_type)
337 {
338         int r = -EEXIST;
339
340         if (dev->irq_requested_type & KVM_DEV_IRQ_HOST_MASK)
341                 return r;
342
343         snprintf(dev->irq_name, sizeof(dev->irq_name), "kvm:%s",
344                  pci_name(dev->dev));
345
346         switch (host_irq_type) {
347         case KVM_DEV_IRQ_HOST_INTX:
348                 r = assigned_device_enable_host_intx(kvm, dev);
349                 break;
350 #ifdef __KVM_HAVE_MSI
351         case KVM_DEV_IRQ_HOST_MSI:
352                 r = assigned_device_enable_host_msi(kvm, dev);
353                 break;
354 #endif
355 #ifdef __KVM_HAVE_MSIX
356         case KVM_DEV_IRQ_HOST_MSIX:
357                 r = assigned_device_enable_host_msix(kvm, dev);
358                 break;
359 #endif
360         default:
361                 r = -EINVAL;
362         }
363
364         if (!r)
365                 dev->irq_requested_type |= host_irq_type;
366
367         return r;
368 }
369
370 static int assign_guest_irq(struct kvm *kvm,
371                             struct kvm_assigned_dev_kernel *dev,
372                             struct kvm_assigned_irq *irq,
373                             unsigned long guest_irq_type)
374 {
375         int id;
376         int r = -EEXIST;
377
378         if (dev->irq_requested_type & KVM_DEV_IRQ_GUEST_MASK)
379                 return r;
380
381         id = kvm_request_irq_source_id(kvm);
382         if (id < 0)
383                 return id;
384
385         dev->irq_source_id = id;
386
387         switch (guest_irq_type) {
388         case KVM_DEV_IRQ_GUEST_INTX:
389                 r = assigned_device_enable_guest_intx(kvm, dev, irq);
390                 break;
391 #ifdef __KVM_HAVE_MSI
392         case KVM_DEV_IRQ_GUEST_MSI:
393                 r = assigned_device_enable_guest_msi(kvm, dev, irq);
394                 break;
395 #endif
396 #ifdef __KVM_HAVE_MSIX
397         case KVM_DEV_IRQ_GUEST_MSIX:
398                 r = assigned_device_enable_guest_msix(kvm, dev, irq);
399                 break;
400 #endif
401         default:
402                 r = -EINVAL;
403         }
404
405         if (!r) {
406                 dev->irq_requested_type |= guest_irq_type;
407                 kvm_register_irq_ack_notifier(kvm, &dev->ack_notifier);
408         } else
409                 kvm_free_irq_source_id(kvm, dev->irq_source_id);
410
411         return r;
412 }
413
414 /* TODO Deal with KVM_DEV_IRQ_ASSIGNED_MASK_MSIX */
415 static int kvm_vm_ioctl_assign_irq(struct kvm *kvm,
416                                    struct kvm_assigned_irq *assigned_irq)
417 {
418         int r = -EINVAL;
419         struct kvm_assigned_dev_kernel *match;
420         unsigned long host_irq_type, guest_irq_type;
421
422         if (!irqchip_in_kernel(kvm))
423                 return r;
424
425         mutex_lock(&kvm->lock);
426         r = -ENODEV;
427         match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
428                                       assigned_irq->assigned_dev_id);
429         if (!match)
430                 goto out;
431
432         host_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_HOST_MASK);
433         guest_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_GUEST_MASK);
434
435         r = -EINVAL;
436         /* can only assign one type at a time */
437         if (hweight_long(host_irq_type) > 1)
438                 goto out;
439         if (hweight_long(guest_irq_type) > 1)
440                 goto out;
441         if (host_irq_type == 0 && guest_irq_type == 0)
442                 goto out;
443
444         r = 0;
445         if (host_irq_type)
446                 r = assign_host_irq(kvm, match, host_irq_type);
447         if (r)
448                 goto out;
449
450         if (guest_irq_type)
451                 r = assign_guest_irq(kvm, match, assigned_irq, guest_irq_type);
452 out:
453         mutex_unlock(&kvm->lock);
454         return r;
455 }
456
457 static int kvm_vm_ioctl_deassign_dev_irq(struct kvm *kvm,
458                                          struct kvm_assigned_irq
459                                          *assigned_irq)
460 {
461         int r = -ENODEV;
462         struct kvm_assigned_dev_kernel *match;
463
464         mutex_lock(&kvm->lock);
465
466         match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
467                                       assigned_irq->assigned_dev_id);
468         if (!match)
469                 goto out;
470
471         r = kvm_deassign_irq(kvm, match, assigned_irq->flags);
472 out:
473         mutex_unlock(&kvm->lock);
474         return r;
475 }
476
477 static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
478                                       struct kvm_assigned_pci_dev *assigned_dev)
479 {
480         int r = 0, idx;
481         struct kvm_assigned_dev_kernel *match;
482         struct pci_dev *dev;
483
484         mutex_lock(&kvm->lock);
485         idx = srcu_read_lock(&kvm->srcu);
486
487         match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
488                                       assigned_dev->assigned_dev_id);
489         if (match) {
490                 /* device already assigned */
491                 r = -EEXIST;
492                 goto out;
493         }
494
495         match = kzalloc(sizeof(struct kvm_assigned_dev_kernel), GFP_KERNEL);
496         if (match == NULL) {
497                 printk(KERN_INFO "%s: Couldn't allocate memory\n",
498                        __func__);
499                 r = -ENOMEM;
500                 goto out;
501         }
502         dev = pci_get_domain_bus_and_slot(assigned_dev->segnr,
503                                    assigned_dev->busnr,
504                                    assigned_dev->devfn);
505         if (!dev) {
506                 printk(KERN_INFO "%s: host device not found\n", __func__);
507                 r = -EINVAL;
508                 goto out_free;
509         }
510         if (pci_enable_device(dev)) {
511                 printk(KERN_INFO "%s: Could not enable PCI device\n", __func__);
512                 r = -EBUSY;
513                 goto out_put;
514         }
515         r = pci_request_regions(dev, "kvm_assigned_device");
516         if (r) {
517                 printk(KERN_INFO "%s: Could not get access to device regions\n",
518                        __func__);
519                 goto out_disable;
520         }
521
522         pci_reset_function(dev);
523         pci_save_state(dev);
524         match->pci_saved_state = pci_store_saved_state(dev);
525         if (!match->pci_saved_state)
526                 printk(KERN_DEBUG "%s: Couldn't store %s saved state\n",
527                        __func__, dev_name(&dev->dev));
528         match->assigned_dev_id = assigned_dev->assigned_dev_id;
529         match->host_segnr = assigned_dev->segnr;
530         match->host_busnr = assigned_dev->busnr;
531         match->host_devfn = assigned_dev->devfn;
532         match->flags = assigned_dev->flags;
533         match->dev = dev;
534         spin_lock_init(&match->intx_lock);
535         match->irq_source_id = -1;
536         match->kvm = kvm;
537         match->ack_notifier.irq_acked = kvm_assigned_dev_ack_irq;
538
539         list_add(&match->list, &kvm->arch.assigned_dev_head);
540
541         if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) {
542                 if (!kvm->arch.iommu_domain) {
543                         r = kvm_iommu_map_guest(kvm);
544                         if (r)
545                                 goto out_list_del;
546                 }
547                 r = kvm_assign_device(kvm, match);
548                 if (r)
549                         goto out_list_del;
550         }
551
552 out:
553         srcu_read_unlock(&kvm->srcu, idx);
554         mutex_unlock(&kvm->lock);
555         return r;
556 out_list_del:
557         if (pci_load_and_free_saved_state(dev, &match->pci_saved_state))
558                 printk(KERN_INFO "%s: Couldn't reload %s saved state\n",
559                        __func__, dev_name(&dev->dev));
560         list_del(&match->list);
561         pci_release_regions(dev);
562 out_disable:
563         pci_disable_device(dev);
564 out_put:
565         pci_dev_put(dev);
566 out_free:
567         kfree(match);
568         srcu_read_unlock(&kvm->srcu, idx);
569         mutex_unlock(&kvm->lock);
570         return r;
571 }
572
573 static int kvm_vm_ioctl_deassign_device(struct kvm *kvm,
574                 struct kvm_assigned_pci_dev *assigned_dev)
575 {
576         int r = 0;
577         struct kvm_assigned_dev_kernel *match;
578
579         mutex_lock(&kvm->lock);
580
581         match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
582                                       assigned_dev->assigned_dev_id);
583         if (!match) {
584                 printk(KERN_INFO "%s: device hasn't been assigned before, "
585                   "so cannot be deassigned\n", __func__);
586                 r = -EINVAL;
587                 goto out;
588         }
589
590         if (match->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU)
591                 kvm_deassign_device(kvm, match);
592
593         kvm_free_assigned_device(kvm, match);
594
595 out:
596         mutex_unlock(&kvm->lock);
597         return r;
598 }
599
600
601 #ifdef __KVM_HAVE_MSIX
602 static int kvm_vm_ioctl_set_msix_nr(struct kvm *kvm,
603                                     struct kvm_assigned_msix_nr *entry_nr)
604 {
605         int r = 0;
606         struct kvm_assigned_dev_kernel *adev;
607
608         mutex_lock(&kvm->lock);
609
610         adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
611                                       entry_nr->assigned_dev_id);
612         if (!adev) {
613                 r = -EINVAL;
614                 goto msix_nr_out;
615         }
616
617         if (adev->entries_nr == 0) {
618                 adev->entries_nr = entry_nr->entry_nr;
619                 if (adev->entries_nr == 0 ||
620                     adev->entries_nr >= KVM_MAX_MSIX_PER_DEV) {
621                         r = -EINVAL;
622                         goto msix_nr_out;
623                 }
624
625                 adev->host_msix_entries = kzalloc(sizeof(struct msix_entry) *
626                                                 entry_nr->entry_nr,
627                                                 GFP_KERNEL);
628                 if (!adev->host_msix_entries) {
629                         r = -ENOMEM;
630                         goto msix_nr_out;
631                 }
632                 adev->guest_msix_entries =
633                         kzalloc(sizeof(struct msix_entry) * entry_nr->entry_nr,
634                                 GFP_KERNEL);
635                 if (!adev->guest_msix_entries) {
636                         kfree(adev->host_msix_entries);
637                         r = -ENOMEM;
638                         goto msix_nr_out;
639                 }
640         } else /* Not allowed set MSI-X number twice */
641                 r = -EINVAL;
642 msix_nr_out:
643         mutex_unlock(&kvm->lock);
644         return r;
645 }
646
647 static int kvm_vm_ioctl_set_msix_entry(struct kvm *kvm,
648                                        struct kvm_assigned_msix_entry *entry)
649 {
650         int r = 0, i;
651         struct kvm_assigned_dev_kernel *adev;
652
653         mutex_lock(&kvm->lock);
654
655         adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
656                                       entry->assigned_dev_id);
657
658         if (!adev) {
659                 r = -EINVAL;
660                 goto msix_entry_out;
661         }
662
663         for (i = 0; i < adev->entries_nr; i++)
664                 if (adev->guest_msix_entries[i].vector == 0 ||
665                     adev->guest_msix_entries[i].entry == entry->entry) {
666                         adev->guest_msix_entries[i].entry = entry->entry;
667                         adev->guest_msix_entries[i].vector = entry->gsi;
668                         adev->host_msix_entries[i].entry = entry->entry;
669                         break;
670                 }
671         if (i == adev->entries_nr) {
672                 r = -ENOSPC;
673                 goto msix_entry_out;
674         }
675
676 msix_entry_out:
677         mutex_unlock(&kvm->lock);
678
679         return r;
680 }
681 #endif
682
683 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
684                                   unsigned long arg)
685 {
686         void __user *argp = (void __user *)arg;
687         int r;
688
689         switch (ioctl) {
690         case KVM_ASSIGN_PCI_DEVICE: {
691                 struct kvm_assigned_pci_dev assigned_dev;
692
693                 r = -EFAULT;
694                 if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev))
695                         goto out;
696                 r = kvm_vm_ioctl_assign_device(kvm, &assigned_dev);
697                 if (r)
698                         goto out;
699                 break;
700         }
701         case KVM_ASSIGN_IRQ: {
702                 r = -EOPNOTSUPP;
703                 break;
704         }
705         case KVM_ASSIGN_DEV_IRQ: {
706                 struct kvm_assigned_irq assigned_irq;
707
708                 r = -EFAULT;
709                 if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq))
710                         goto out;
711                 r = kvm_vm_ioctl_assign_irq(kvm, &assigned_irq);
712                 if (r)
713                         goto out;
714                 break;
715         }
716         case KVM_DEASSIGN_DEV_IRQ: {
717                 struct kvm_assigned_irq assigned_irq;
718
719                 r = -EFAULT;
720                 if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq))
721                         goto out;
722                 r = kvm_vm_ioctl_deassign_dev_irq(kvm, &assigned_irq);
723                 if (r)
724                         goto out;
725                 break;
726         }
727         case KVM_DEASSIGN_PCI_DEVICE: {
728                 struct kvm_assigned_pci_dev assigned_dev;
729
730                 r = -EFAULT;
731                 if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev))
732                         goto out;
733                 r = kvm_vm_ioctl_deassign_device(kvm, &assigned_dev);
734                 if (r)
735                         goto out;
736                 break;
737         }
738 #ifdef KVM_CAP_IRQ_ROUTING
739         case KVM_SET_GSI_ROUTING: {
740                 struct kvm_irq_routing routing;
741                 struct kvm_irq_routing __user *urouting;
742                 struct kvm_irq_routing_entry *entries;
743
744                 r = -EFAULT;
745                 if (copy_from_user(&routing, argp, sizeof(routing)))
746                         goto out;
747                 r = -EINVAL;
748                 if (routing.nr >= KVM_MAX_IRQ_ROUTES)
749                         goto out;
750                 if (routing.flags)
751                         goto out;
752                 r = -ENOMEM;
753                 entries = vmalloc(routing.nr * sizeof(*entries));
754                 if (!entries)
755                         goto out;
756                 r = -EFAULT;
757                 urouting = argp;
758                 if (copy_from_user(entries, urouting->entries,
759                                    routing.nr * sizeof(*entries)))
760                         goto out_free_irq_routing;
761                 r = kvm_set_irq_routing(kvm, entries, routing.nr,
762                                         routing.flags);
763         out_free_irq_routing:
764                 vfree(entries);
765                 break;
766         }
767 #endif /* KVM_CAP_IRQ_ROUTING */
768 #ifdef __KVM_HAVE_MSIX
769         case KVM_ASSIGN_SET_MSIX_NR: {
770                 struct kvm_assigned_msix_nr entry_nr;
771                 r = -EFAULT;
772                 if (copy_from_user(&entry_nr, argp, sizeof entry_nr))
773                         goto out;
774                 r = kvm_vm_ioctl_set_msix_nr(kvm, &entry_nr);
775                 if (r)
776                         goto out;
777                 break;
778         }
779         case KVM_ASSIGN_SET_MSIX_ENTRY: {
780                 struct kvm_assigned_msix_entry entry;
781                 r = -EFAULT;
782                 if (copy_from_user(&entry, argp, sizeof entry))
783                         goto out;
784                 r = kvm_vm_ioctl_set_msix_entry(kvm, &entry);
785                 if (r)
786                         goto out;
787                 break;
788         }
789 #endif
790         default:
791                 r = -ENOTTY;
792                 break;
793         }
794 out:
795         return r;
796 }
797