Blame view
virt/kvm/assigned-dev.c
19.1 KB
bfd99ff5d
|
1 2 3 |
/* * Kernel-based Virtual Machine - device assignment support * |
221d059d1
|
4 |
* Copyright (C) 2010 Red Hat, Inc. and/or its affiliates. |
bfd99ff5d
|
5 6 7 8 9 10 11 12 13 14 15 16 17 18 |
* * This work is licensed under the terms of the GNU GPL, version 2. See * the COPYING file in the top-level directory. * */ #include <linux/kvm_host.h> #include <linux/kvm.h> #include <linux/uaccess.h> #include <linux/vmalloc.h> #include <linux/errno.h> #include <linux/spinlock.h> #include <linux/pci.h> #include <linux/interrupt.h> |
5a0e3ad6a
|
19 |
#include <linux/slab.h> |
bfd99ff5d
|
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 |
#include "irq.h" static struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head, int assigned_dev_id) { struct list_head *ptr; struct kvm_assigned_dev_kernel *match; list_for_each(ptr, head) { match = list_entry(ptr, struct kvm_assigned_dev_kernel, list); if (match->assigned_dev_id == assigned_dev_id) return match; } return NULL; } static int find_index_from_host_irq(struct kvm_assigned_dev_kernel *assigned_dev, int irq) { int i, index; struct msix_entry *host_msix_entries; host_msix_entries = assigned_dev->host_msix_entries; index = -1; for (i = 0; i < assigned_dev->entries_nr; i++) if (irq == host_msix_entries[i].vector) { index = i; break; } if (index < 0) { printk(KERN_WARNING "Fail to find correlated MSI-X entry! "); return 0; } return index; } |
0645211c4
|
58 |
static irqreturn_t kvm_assigned_dev_thread(int irq, void *dev_id) |
bfd99ff5d
|
59 |
{ |
0645211c4
|
60 |
struct kvm_assigned_dev_kernel *assigned_dev = dev_id; |
bfd99ff5d
|
61 |
|
0645211c4
|
62 63 64 65 66 67 |
if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_INTX) { spin_lock(&assigned_dev->intx_lock); disable_irq_nosync(irq); assigned_dev->host_irq_disabled = true; spin_unlock(&assigned_dev->intx_lock); } |
bfd99ff5d
|
68 |
|
cc0793968
|
69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 |
kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id, assigned_dev->guest_irq, 1); return IRQ_HANDLED; } #ifdef __KVM_HAVE_MSIX static irqreturn_t kvm_assigned_dev_thread_msix(int irq, void *dev_id) { struct kvm_assigned_dev_kernel *assigned_dev = dev_id; int index = find_index_from_host_irq(assigned_dev, irq); u32 vector; if (index >= 0) { vector = assigned_dev->guest_msix_entries[index].vector; |
bfd99ff5d
|
84 |
kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id, |
cc0793968
|
85 86 |
vector, 1); } |
bfd99ff5d
|
87 |
|
bfd99ff5d
|
88 89 |
return IRQ_HANDLED; } |
cc0793968
|
90 |
#endif |
bfd99ff5d
|
91 92 93 94 |
/* Ack the irq line for an assigned device */ static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian) { |
c61fa9d63
|
95 96 97 |
struct kvm_assigned_dev_kernel *dev = container_of(kian, struct kvm_assigned_dev_kernel, ack_notifier); |
bfd99ff5d
|
98 99 100 101 102 103 |
kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0); /* The guest irq may be shared so this ack may be * from another device. */ |
0645211c4
|
104 |
spin_lock(&dev->intx_lock); |
bfd99ff5d
|
105 106 107 108 |
if (dev->host_irq_disabled) { enable_irq(dev->host_irq); dev->host_irq_disabled = false; } |
0645211c4
|
109 |
spin_unlock(&dev->intx_lock); |
bfd99ff5d
|
110 111 112 113 114 |
} static void deassign_guest_irq(struct kvm *kvm, struct kvm_assigned_dev_kernel *assigned_dev) { |
c61fa9d63
|
115 116 117 |
if (assigned_dev->ack_notifier.gsi != -1) kvm_unregister_irq_ack_notifier(kvm, &assigned_dev->ack_notifier); |
bfd99ff5d
|
118 |
|
0c106b5aa
|
119 120 |
kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id, assigned_dev->guest_irq, 0); |
bfd99ff5d
|
121 122 123 124 125 126 127 128 129 130 131 |
if (assigned_dev->irq_source_id != -1) kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id); assigned_dev->irq_source_id = -1; assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_GUEST_MASK); } /* The function implicit hold kvm->lock mutex due to cancel_work_sync() */ static void deassign_host_irq(struct kvm *kvm, struct kvm_assigned_dev_kernel *assigned_dev) { /* |
0645211c4
|
132 |
* We disable irq here to prevent further events. |
bfd99ff5d
|
133 134 135 136 137 138 |
* * Notice this maybe result in nested disable if the interrupt type is * INTx, but it's OK for we are going to free it. * * If this function is a part of VM destroy, please ensure that till * now, the kvm state is still legal for probably we also have to wait |
0645211c4
|
139 |
* on a currently running IRQ handler. |
bfd99ff5d
|
140 141 142 143 |
*/ if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) { int i; for (i = 0; i < assigned_dev->entries_nr; i++) |
0645211c4
|
144 |
disable_irq(assigned_dev->host_msix_entries[i].vector); |
bfd99ff5d
|
145 146 147 |
for (i = 0; i < assigned_dev->entries_nr; i++) free_irq(assigned_dev->host_msix_entries[i].vector, |
9f9f6b787
|
148 |
assigned_dev); |
bfd99ff5d
|
149 150 151 152 153 154 155 |
assigned_dev->entries_nr = 0; kfree(assigned_dev->host_msix_entries); kfree(assigned_dev->guest_msix_entries); pci_disable_msix(assigned_dev->dev); } else { /* Deal with MSI and INTx */ |
0645211c4
|
156 |
disable_irq(assigned_dev->host_irq); |
bfd99ff5d
|
157 |
|
9f9f6b787
|
158 |
free_irq(assigned_dev->host_irq, assigned_dev); |
bfd99ff5d
|
159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 |
if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSI) pci_disable_msi(assigned_dev->dev); } assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_HOST_MASK); } static int kvm_deassign_irq(struct kvm *kvm, struct kvm_assigned_dev_kernel *assigned_dev, unsigned long irq_requested_type) { unsigned long guest_irq_type, host_irq_type; if (!irqchip_in_kernel(kvm)) return -EINVAL; /* no irq assignment to deassign */ if (!assigned_dev->irq_requested_type) return -ENXIO; host_irq_type = irq_requested_type & KVM_DEV_IRQ_HOST_MASK; guest_irq_type = irq_requested_type & KVM_DEV_IRQ_GUEST_MASK; if (host_irq_type) deassign_host_irq(kvm, assigned_dev); if (guest_irq_type) deassign_guest_irq(kvm, assigned_dev); return 0; } static void kvm_free_assigned_irq(struct kvm *kvm, struct kvm_assigned_dev_kernel *assigned_dev) { kvm_deassign_irq(kvm, assigned_dev, assigned_dev->irq_requested_type); } static void kvm_free_assigned_device(struct kvm *kvm, struct kvm_assigned_dev_kernel *assigned_dev) { kvm_free_assigned_irq(kvm, assigned_dev); |
f8fcfd775
|
201 202 203 204 205 206 207 208 |
pci_reset_function(assigned_dev->dev); if (pci_load_and_free_saved_state(assigned_dev->dev, &assigned_dev->pci_saved_state)) printk(KERN_INFO "%s: Couldn't reload %s saved state ", __func__, dev_name(&assigned_dev->dev->dev)); else pci_restore_state(assigned_dev->dev); |
bfd99ff5d
|
209 |
|
6777829cf
|
210 |
assigned_dev->dev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED; |
bfd99ff5d
|
211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 |
pci_release_regions(assigned_dev->dev); pci_disable_device(assigned_dev->dev); pci_dev_put(assigned_dev->dev); list_del(&assigned_dev->list); kfree(assigned_dev); } void kvm_free_all_assigned_devices(struct kvm *kvm) { struct list_head *ptr, *ptr2; struct kvm_assigned_dev_kernel *assigned_dev; list_for_each_safe(ptr, ptr2, &kvm->arch.assigned_dev_head) { assigned_dev = list_entry(ptr, struct kvm_assigned_dev_kernel, list); kvm_free_assigned_device(kvm, assigned_dev); } } static int assigned_device_enable_host_intx(struct kvm *kvm, struct kvm_assigned_dev_kernel *dev) { dev->host_irq = dev->dev->irq; /* Even though this is PCI, we don't want to use shared * interrupts. Sharing host devices with guest-assigned devices * on the same interrupt line is not a happy situation: there * are going to be long delays in accepting, acking, etc. */ |
0645211c4
|
242 |
if (request_threaded_irq(dev->host_irq, NULL, kvm_assigned_dev_thread, |
9f9f6b787
|
243 |
IRQF_ONESHOT, dev->irq_name, dev)) |
bfd99ff5d
|
244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 |
return -EIO; return 0; } #ifdef __KVM_HAVE_MSI static int assigned_device_enable_host_msi(struct kvm *kvm, struct kvm_assigned_dev_kernel *dev) { int r; if (!dev->dev->msi_enabled) { r = pci_enable_msi(dev->dev); if (r) return r; } dev->host_irq = dev->dev->irq; |
0645211c4
|
261 |
if (request_threaded_irq(dev->host_irq, NULL, kvm_assigned_dev_thread, |
9f9f6b787
|
262 |
0, dev->irq_name, dev)) { |
bfd99ff5d
|
263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 |
pci_disable_msi(dev->dev); return -EIO; } return 0; } #endif #ifdef __KVM_HAVE_MSIX static int assigned_device_enable_host_msix(struct kvm *kvm, struct kvm_assigned_dev_kernel *dev) { int i, r = -EINVAL; /* host_msix_entries and guest_msix_entries should have been * initialized */ if (dev->entries_nr == 0) return r; r = pci_enable_msix(dev->dev, dev->host_msix_entries, dev->entries_nr); if (r) return r; for (i = 0; i < dev->entries_nr; i++) { |
0645211c4
|
287 |
r = request_threaded_irq(dev->host_msix_entries[i].vector, |
cc0793968
|
288 |
NULL, kvm_assigned_dev_thread_msix, |
9f9f6b787
|
289 |
0, dev->irq_name, dev); |
bfd99ff5d
|
290 |
if (r) |
d57e2c074
|
291 |
goto err; |
bfd99ff5d
|
292 293 294 |
} return 0; |
d57e2c074
|
295 296 |
err: for (i -= 1; i >= 0; i--) |
9f9f6b787
|
297 |
free_irq(dev->host_msix_entries[i].vector, dev); |
d57e2c074
|
298 299 |
pci_disable_msix(dev->dev); return r; |
bfd99ff5d
|
300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 |
} #endif static int assigned_device_enable_guest_intx(struct kvm *kvm, struct kvm_assigned_dev_kernel *dev, struct kvm_assigned_irq *irq) { dev->guest_irq = irq->guest_irq; dev->ack_notifier.gsi = irq->guest_irq; return 0; } #ifdef __KVM_HAVE_MSI static int assigned_device_enable_guest_msi(struct kvm *kvm, struct kvm_assigned_dev_kernel *dev, struct kvm_assigned_irq *irq) { dev->guest_irq = irq->guest_irq; dev->ack_notifier.gsi = -1; dev->host_irq_disabled = false; return 0; } #endif #ifdef __KVM_HAVE_MSIX static int assigned_device_enable_guest_msix(struct kvm *kvm, struct kvm_assigned_dev_kernel *dev, struct kvm_assigned_irq *irq) { dev->guest_irq = irq->guest_irq; dev->ack_notifier.gsi = -1; dev->host_irq_disabled = false; return 0; } #endif static int assign_host_irq(struct kvm *kvm, struct kvm_assigned_dev_kernel *dev, __u32 host_irq_type) { int r = -EEXIST; if (dev->irq_requested_type & KVM_DEV_IRQ_HOST_MASK) return r; |
1e001d49f
|
345 346 |
snprintf(dev->irq_name, sizeof(dev->irq_name), "kvm:%s", pci_name(dev->dev)); |
bfd99ff5d
|
347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 |
switch (host_irq_type) { case KVM_DEV_IRQ_HOST_INTX: r = assigned_device_enable_host_intx(kvm, dev); break; #ifdef __KVM_HAVE_MSI case KVM_DEV_IRQ_HOST_MSI: r = assigned_device_enable_host_msi(kvm, dev); break; #endif #ifdef __KVM_HAVE_MSIX case KVM_DEV_IRQ_HOST_MSIX: r = assigned_device_enable_host_msix(kvm, dev); break; #endif default: r = -EINVAL; } if (!r) dev->irq_requested_type |= host_irq_type; return r; } static int assign_guest_irq(struct kvm *kvm, struct kvm_assigned_dev_kernel *dev, struct kvm_assigned_irq *irq, unsigned long guest_irq_type) { int id; int r = -EEXIST; if (dev->irq_requested_type & KVM_DEV_IRQ_GUEST_MASK) return r; id = kvm_request_irq_source_id(kvm); if (id < 0) return id; dev->irq_source_id = id; switch (guest_irq_type) { case KVM_DEV_IRQ_GUEST_INTX: r = assigned_device_enable_guest_intx(kvm, dev, irq); break; #ifdef __KVM_HAVE_MSI case KVM_DEV_IRQ_GUEST_MSI: r = assigned_device_enable_guest_msi(kvm, dev, irq); break; #endif #ifdef __KVM_HAVE_MSIX case KVM_DEV_IRQ_GUEST_MSIX: r = assigned_device_enable_guest_msix(kvm, dev, irq); break; #endif default: r = -EINVAL; } if (!r) { dev->irq_requested_type |= guest_irq_type; |
c61fa9d63
|
408 409 |
if (dev->ack_notifier.gsi != -1) kvm_register_irq_ack_notifier(kvm, &dev->ack_notifier); |
bfd99ff5d
|
410 411 412 413 414 415 416 417 418 419 420 421 422 |
} else kvm_free_irq_source_id(kvm, dev->irq_source_id); return r; } /* TODO Deal with KVM_DEV_IRQ_ASSIGNED_MASK_MSIX */ static int kvm_vm_ioctl_assign_irq(struct kvm *kvm, struct kvm_assigned_irq *assigned_irq) { int r = -EINVAL; struct kvm_assigned_dev_kernel *match; unsigned long host_irq_type, guest_irq_type; |
bfd99ff5d
|
423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 |
if (!irqchip_in_kernel(kvm)) return r; mutex_lock(&kvm->lock); r = -ENODEV; match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, assigned_irq->assigned_dev_id); if (!match) goto out; host_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_HOST_MASK); guest_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_GUEST_MASK); r = -EINVAL; /* can only assign one type at a time */ if (hweight_long(host_irq_type) > 1) goto out; if (hweight_long(guest_irq_type) > 1) goto out; if (host_irq_type == 0 && guest_irq_type == 0) goto out; r = 0; if (host_irq_type) r = assign_host_irq(kvm, match, host_irq_type); if (r) goto out; if (guest_irq_type) r = assign_guest_irq(kvm, match, assigned_irq, guest_irq_type); out: mutex_unlock(&kvm->lock); return r; } static int kvm_vm_ioctl_deassign_dev_irq(struct kvm *kvm, struct kvm_assigned_irq *assigned_irq) { int r = -ENODEV; struct kvm_assigned_dev_kernel *match; mutex_lock(&kvm->lock); match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, assigned_irq->assigned_dev_id); if (!match) goto out; r = kvm_deassign_irq(kvm, match, assigned_irq->flags); out: mutex_unlock(&kvm->lock); return r; } static int kvm_vm_ioctl_assign_device(struct kvm *kvm, struct kvm_assigned_pci_dev *assigned_dev) { |
bc6678a33
|
481 |
int r = 0, idx; |
bfd99ff5d
|
482 483 |
struct kvm_assigned_dev_kernel *match; struct pci_dev *dev; |
bfd99ff5d
|
484 |
mutex_lock(&kvm->lock); |
bc6678a33
|
485 |
idx = srcu_read_lock(&kvm->srcu); |
bfd99ff5d
|
486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 |
match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, assigned_dev->assigned_dev_id); if (match) { /* device already assigned */ r = -EEXIST; goto out; } match = kzalloc(sizeof(struct kvm_assigned_dev_kernel), GFP_KERNEL); if (match == NULL) { printk(KERN_INFO "%s: Couldn't allocate memory ", __func__); r = -ENOMEM; goto out; } |
ab9f4ecbb
|
503 504 |
dev = pci_get_domain_bus_and_slot(assigned_dev->segnr, assigned_dev->busnr, |
bfd99ff5d
|
505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 |
assigned_dev->devfn); if (!dev) { printk(KERN_INFO "%s: host device not found ", __func__); r = -EINVAL; goto out_free; } if (pci_enable_device(dev)) { printk(KERN_INFO "%s: Could not enable PCI device ", __func__); r = -EBUSY; goto out_put; } r = pci_request_regions(dev, "kvm_assigned_device"); if (r) { printk(KERN_INFO "%s: Could not get access to device regions ", __func__); goto out_disable; } pci_reset_function(dev); |
ed78661f2
|
527 |
pci_save_state(dev); |
f8fcfd775
|
528 529 530 531 532 |
match->pci_saved_state = pci_store_saved_state(dev); if (!match->pci_saved_state) printk(KERN_DEBUG "%s: Couldn't store %s saved state ", __func__, dev_name(&dev->dev)); |
bfd99ff5d
|
533 |
match->assigned_dev_id = assigned_dev->assigned_dev_id; |
ab9f4ecbb
|
534 |
match->host_segnr = assigned_dev->segnr; |
bfd99ff5d
|
535 536 537 538 |
match->host_busnr = assigned_dev->busnr; match->host_devfn = assigned_dev->devfn; match->flags = assigned_dev->flags; match->dev = dev; |
0645211c4
|
539 |
spin_lock_init(&match->intx_lock); |
bfd99ff5d
|
540 541 542 |
match->irq_source_id = -1; match->kvm = kvm; match->ack_notifier.irq_acked = kvm_assigned_dev_ack_irq; |
bfd99ff5d
|
543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 |
list_add(&match->list, &kvm->arch.assigned_dev_head); if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) { if (!kvm->arch.iommu_domain) { r = kvm_iommu_map_guest(kvm); if (r) goto out_list_del; } r = kvm_assign_device(kvm, match); if (r) goto out_list_del; } out: |
bc6678a33
|
558 |
srcu_read_unlock(&kvm->srcu, idx); |
fae3a3536
|
559 |
mutex_unlock(&kvm->lock); |
bfd99ff5d
|
560 561 |
return r; out_list_del: |
f8fcfd775
|
562 563 564 565 |
if (pci_load_and_free_saved_state(dev, &match->pci_saved_state)) printk(KERN_INFO "%s: Couldn't reload %s saved state ", __func__, dev_name(&dev->dev)); |
bfd99ff5d
|
566 567 568 569 570 571 572 573 |
list_del(&match->list); pci_release_regions(dev); out_disable: pci_disable_device(dev); out_put: pci_dev_put(dev); out_free: kfree(match); |
bc6678a33
|
574 |
srcu_read_unlock(&kvm->srcu, idx); |
fae3a3536
|
575 |
mutex_unlock(&kvm->lock); |
bfd99ff5d
|
576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 |
return r; } static int kvm_vm_ioctl_deassign_device(struct kvm *kvm, struct kvm_assigned_pci_dev *assigned_dev) { int r = 0; struct kvm_assigned_dev_kernel *match; mutex_lock(&kvm->lock); match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, assigned_dev->assigned_dev_id); if (!match) { printk(KERN_INFO "%s: device hasn't been assigned before, " "so cannot be deassigned ", __func__); r = -EINVAL; goto out; } if (match->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) kvm_deassign_device(kvm, match); kvm_free_assigned_device(kvm, match); out: mutex_unlock(&kvm->lock); return r; } #ifdef __KVM_HAVE_MSIX static int kvm_vm_ioctl_set_msix_nr(struct kvm *kvm, struct kvm_assigned_msix_nr *entry_nr) { int r = 0; struct kvm_assigned_dev_kernel *adev; mutex_lock(&kvm->lock); adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, entry_nr->assigned_dev_id); if (!adev) { r = -EINVAL; goto msix_nr_out; } if (adev->entries_nr == 0) { adev->entries_nr = entry_nr->entry_nr; if (adev->entries_nr == 0 || |
9f3191aec
|
627 |
adev->entries_nr > KVM_MAX_MSIX_PER_DEV) { |
bfd99ff5d
|
628 629 630 631 632 633 634 635 636 637 638 |
r = -EINVAL; goto msix_nr_out; } adev->host_msix_entries = kzalloc(sizeof(struct msix_entry) * entry_nr->entry_nr, GFP_KERNEL); if (!adev->host_msix_entries) { r = -ENOMEM; goto msix_nr_out; } |
0645211c4
|
639 640 641 |
adev->guest_msix_entries = kzalloc(sizeof(struct msix_entry) * entry_nr->entry_nr, GFP_KERNEL); |
bfd99ff5d
|
642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 |
if (!adev->guest_msix_entries) { kfree(adev->host_msix_entries); r = -ENOMEM; goto msix_nr_out; } } else /* Not allowed set MSI-X number twice */ r = -EINVAL; msix_nr_out: mutex_unlock(&kvm->lock); return r; } static int kvm_vm_ioctl_set_msix_entry(struct kvm *kvm, struct kvm_assigned_msix_entry *entry) { int r = 0, i; struct kvm_assigned_dev_kernel *adev; mutex_lock(&kvm->lock); adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, entry->assigned_dev_id); if (!adev) { r = -EINVAL; goto msix_entry_out; } for (i = 0; i < adev->entries_nr; i++) if (adev->guest_msix_entries[i].vector == 0 || adev->guest_msix_entries[i].entry == entry->entry) { adev->guest_msix_entries[i].entry = entry->entry; adev->guest_msix_entries[i].vector = entry->gsi; adev->host_msix_entries[i].entry = entry->entry; break; } if (i == adev->entries_nr) { r = -ENOSPC; goto msix_entry_out; } msix_entry_out: mutex_unlock(&kvm->lock); return r; } #endif long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, unsigned long arg) { void __user *argp = (void __user *)arg; |
51de271d4
|
694 |
int r; |
bfd99ff5d
|
695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 |
switch (ioctl) { case KVM_ASSIGN_PCI_DEVICE: { struct kvm_assigned_pci_dev assigned_dev; r = -EFAULT; if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev)) goto out; r = kvm_vm_ioctl_assign_device(kvm, &assigned_dev); if (r) goto out; break; } case KVM_ASSIGN_IRQ: { r = -EOPNOTSUPP; break; } |
bfd99ff5d
|
712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 |
case KVM_ASSIGN_DEV_IRQ: { struct kvm_assigned_irq assigned_irq; r = -EFAULT; if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq)) goto out; r = kvm_vm_ioctl_assign_irq(kvm, &assigned_irq); if (r) goto out; break; } case KVM_DEASSIGN_DEV_IRQ: { struct kvm_assigned_irq assigned_irq; r = -EFAULT; if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq)) goto out; r = kvm_vm_ioctl_deassign_dev_irq(kvm, &assigned_irq); if (r) goto out; break; } |
bfd99ff5d
|
734 735 736 737 738 739 740 741 742 743 744 |
case KVM_DEASSIGN_PCI_DEVICE: { struct kvm_assigned_pci_dev assigned_dev; r = -EFAULT; if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev)) goto out; r = kvm_vm_ioctl_deassign_device(kvm, &assigned_dev); if (r) goto out; break; } |
bfd99ff5d
|
745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 |
#ifdef KVM_CAP_IRQ_ROUTING case KVM_SET_GSI_ROUTING: { struct kvm_irq_routing routing; struct kvm_irq_routing __user *urouting; struct kvm_irq_routing_entry *entries; r = -EFAULT; if (copy_from_user(&routing, argp, sizeof(routing))) goto out; r = -EINVAL; if (routing.nr >= KVM_MAX_IRQ_ROUTES) goto out; if (routing.flags) goto out; r = -ENOMEM; entries = vmalloc(routing.nr * sizeof(*entries)); if (!entries) goto out; r = -EFAULT; urouting = argp; if (copy_from_user(entries, urouting->entries, routing.nr * sizeof(*entries))) goto out_free_irq_routing; r = kvm_set_irq_routing(kvm, entries, routing.nr, routing.flags); out_free_irq_routing: vfree(entries); break; } #endif /* KVM_CAP_IRQ_ROUTING */ #ifdef __KVM_HAVE_MSIX case KVM_ASSIGN_SET_MSIX_NR: { struct kvm_assigned_msix_nr entry_nr; r = -EFAULT; if (copy_from_user(&entry_nr, argp, sizeof entry_nr)) goto out; r = kvm_vm_ioctl_set_msix_nr(kvm, &entry_nr); if (r) goto out; break; } case KVM_ASSIGN_SET_MSIX_ENTRY: { struct kvm_assigned_msix_entry entry; r = -EFAULT; if (copy_from_user(&entry, argp, sizeof entry)) goto out; r = kvm_vm_ioctl_set_msix_entry(kvm, &entry); if (r) goto out; break; } #endif |
51de271d4
|
797 798 799 |
default: r = -ENOTTY; break; |
bfd99ff5d
|
800 801 802 803 |
} out: return r; } |