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21#include "qemu/osdep.h"
22#include <sys/ioctl.h>
23#ifdef CONFIG_KVM
24#include <linux/kvm.h>
25#endif
26#include <linux/vfio.h>
27
28#include "hw/vfio/vfio-common.h"
29#include "hw/vfio/vfio.h"
30#include "exec/address-spaces.h"
31#include "exec/memory.h"
32#include "hw/hw.h"
33#include "qemu/error-report.h"
34#include "qemu/range.h"
35#include "sysemu/kvm.h"
36#include "trace.h"
37#include "qapi/error.h"
38
39struct vfio_group_head vfio_group_list =
40 QLIST_HEAD_INITIALIZER(vfio_group_list);
41struct vfio_as_head vfio_address_spaces =
42 QLIST_HEAD_INITIALIZER(vfio_address_spaces);
43
44#ifdef CONFIG_KVM
45
46
47
48
49
50
51
52static int vfio_kvm_device_fd = -1;
53#endif
54
55
56
57
58void vfio_disable_irqindex(VFIODevice *vbasedev, int index)
59{
60 struct vfio_irq_set irq_set = {
61 .argsz = sizeof(irq_set),
62 .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER,
63 .index = index,
64 .start = 0,
65 .count = 0,
66 };
67
68 ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, &irq_set);
69}
70
71void vfio_unmask_single_irqindex(VFIODevice *vbasedev, int index)
72{
73 struct vfio_irq_set irq_set = {
74 .argsz = sizeof(irq_set),
75 .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_UNMASK,
76 .index = index,
77 .start = 0,
78 .count = 1,
79 };
80
81 ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, &irq_set);
82}
83
84void vfio_mask_single_irqindex(VFIODevice *vbasedev, int index)
85{
86 struct vfio_irq_set irq_set = {
87 .argsz = sizeof(irq_set),
88 .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_MASK,
89 .index = index,
90 .start = 0,
91 .count = 1,
92 };
93
94 ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, &irq_set);
95}
96
97
98
99
100void vfio_region_write(void *opaque, hwaddr addr,
101 uint64_t data, unsigned size)
102{
103 VFIORegion *region = opaque;
104 VFIODevice *vbasedev = region->vbasedev;
105 union {
106 uint8_t byte;
107 uint16_t word;
108 uint32_t dword;
109 uint64_t qword;
110 } buf;
111
112 switch (size) {
113 case 1:
114 buf.byte = data;
115 break;
116 case 2:
117 buf.word = cpu_to_le16(data);
118 break;
119 case 4:
120 buf.dword = cpu_to_le32(data);
121 break;
122 case 8:
123 buf.qword = cpu_to_le64(data);
124 break;
125 default:
126 hw_error("vfio: unsupported write size, %d bytes", size);
127 break;
128 }
129
130 if (pwrite(vbasedev->fd, &buf, size, region->fd_offset + addr) != size) {
131 error_report("%s(%s:region%d+0x%"HWADDR_PRIx", 0x%"PRIx64
132 ",%d) failed: %m",
133 __func__, vbasedev->name, region->nr,
134 addr, data, size);
135 }
136
137 trace_vfio_region_write(vbasedev->name, region->nr, addr, data, size);
138
139
140
141
142
143
144
145
146
147 vbasedev->ops->vfio_eoi(vbasedev);
148}
149
150uint64_t vfio_region_read(void *opaque,
151 hwaddr addr, unsigned size)
152{
153 VFIORegion *region = opaque;
154 VFIODevice *vbasedev = region->vbasedev;
155 union {
156 uint8_t byte;
157 uint16_t word;
158 uint32_t dword;
159 uint64_t qword;
160 } buf;
161 uint64_t data = 0;
162
163 if (pread(vbasedev->fd, &buf, size, region->fd_offset + addr) != size) {
164 error_report("%s(%s:region%d+0x%"HWADDR_PRIx", %d) failed: %m",
165 __func__, vbasedev->name, region->nr,
166 addr, size);
167 return (uint64_t)-1;
168 }
169 switch (size) {
170 case 1:
171 data = buf.byte;
172 break;
173 case 2:
174 data = le16_to_cpu(buf.word);
175 break;
176 case 4:
177 data = le32_to_cpu(buf.dword);
178 break;
179 case 8:
180 data = le64_to_cpu(buf.qword);
181 break;
182 default:
183 hw_error("vfio: unsupported read size, %d bytes", size);
184 break;
185 }
186
187 trace_vfio_region_read(vbasedev->name, region->nr, addr, size, data);
188
189
190 vbasedev->ops->vfio_eoi(vbasedev);
191
192 return data;
193}
194
195const MemoryRegionOps vfio_region_ops = {
196 .read = vfio_region_read,
197 .write = vfio_region_write,
198 .endianness = DEVICE_LITTLE_ENDIAN,
199 .valid = {
200 .min_access_size = 1,
201 .max_access_size = 8,
202 },
203 .impl = {
204 .min_access_size = 1,
205 .max_access_size = 8,
206 },
207};
208
209
210
211
212static int vfio_dma_unmap(VFIOContainer *container,
213 hwaddr iova, ram_addr_t size)
214{
215 struct vfio_iommu_type1_dma_unmap unmap = {
216 .argsz = sizeof(unmap),
217 .flags = 0,
218 .iova = iova,
219 .size = size,
220 };
221
222 if (ioctl(container->fd, VFIO_IOMMU_UNMAP_DMA, &unmap)) {
223 error_report("VFIO_UNMAP_DMA: %d", -errno);
224 return -errno;
225 }
226
227 return 0;
228}
229
230static int vfio_dma_map(VFIOContainer *container, hwaddr iova,
231 ram_addr_t size, void *vaddr, bool readonly)
232{
233 struct vfio_iommu_type1_dma_map map = {
234 .argsz = sizeof(map),
235 .flags = VFIO_DMA_MAP_FLAG_READ,
236 .vaddr = (__u64)(uintptr_t)vaddr,
237 .iova = iova,
238 .size = size,
239 };
240
241 if (!readonly) {
242 map.flags |= VFIO_DMA_MAP_FLAG_WRITE;
243 }
244
245
246
247
248
249
250 if (ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0 ||
251 (errno == EBUSY && vfio_dma_unmap(container, iova, size) == 0 &&
252 ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0)) {
253 return 0;
254 }
255
256 error_report("VFIO_MAP_DMA: %d", -errno);
257 return -errno;
258}
259
260static void vfio_host_win_add(VFIOContainer *container,
261 hwaddr min_iova, hwaddr max_iova,
262 uint64_t iova_pgsizes)
263{
264 VFIOHostDMAWindow *hostwin;
265
266 QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) {
267 if (ranges_overlap(hostwin->min_iova,
268 hostwin->max_iova - hostwin->min_iova + 1,
269 min_iova,
270 max_iova - min_iova + 1)) {
271 hw_error("%s: Overlapped IOMMU are not enabled", __func__);
272 }
273 }
274
275 hostwin = g_malloc0(sizeof(*hostwin));
276
277 hostwin->min_iova = min_iova;
278 hostwin->max_iova = max_iova;
279 hostwin->iova_pgsizes = iova_pgsizes;
280 QLIST_INSERT_HEAD(&container->hostwin_list, hostwin, hostwin_next);
281}
282
283static int vfio_host_win_del(VFIOContainer *container, hwaddr min_iova,
284 hwaddr max_iova)
285{
286 VFIOHostDMAWindow *hostwin;
287
288 QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) {
289 if (hostwin->min_iova == min_iova && hostwin->max_iova == max_iova) {
290 QLIST_REMOVE(hostwin, hostwin_next);
291 return 0;
292 }
293 }
294
295 return -1;
296}
297
298static bool vfio_listener_skipped_section(MemoryRegionSection *section)
299{
300 return (!memory_region_is_ram(section->mr) &&
301 !memory_region_is_iommu(section->mr)) ||
302
303
304
305
306
307
308 section->offset_within_address_space & (1ULL << 63);
309}
310
311
312static bool vfio_get_vaddr(IOMMUTLBEntry *iotlb, void **vaddr,
313 bool *read_only)
314{
315 MemoryRegion *mr;
316 hwaddr xlat;
317 hwaddr len = iotlb->addr_mask + 1;
318 bool writable = iotlb->perm & IOMMU_WO;
319
320
321
322
323
324
325 mr = address_space_translate(&address_space_memory,
326 iotlb->translated_addr,
327 &xlat, &len, writable,
328 MEMTXATTRS_UNSPECIFIED);
329 if (!memory_region_is_ram(mr)) {
330 error_report("iommu map to non memory area %"HWADDR_PRIx"",
331 xlat);
332 return false;
333 }
334
335
336
337
338
339 if (len & iotlb->addr_mask) {
340 error_report("iommu has granularity incompatible with target AS");
341 return false;
342 }
343
344 *vaddr = memory_region_get_ram_ptr(mr) + xlat;
345 *read_only = !writable || mr->readonly;
346
347 return true;
348}
349
350static void vfio_iommu_map_notify(IOMMUNotifier *n, IOMMUTLBEntry *iotlb)
351{
352 VFIOGuestIOMMU *giommu = container_of(n, VFIOGuestIOMMU, n);
353 VFIOContainer *container = giommu->container;
354 hwaddr iova = iotlb->iova + giommu->iommu_offset;
355 bool read_only;
356 void *vaddr;
357 int ret;
358
359 trace_vfio_iommu_map_notify(iotlb->perm == IOMMU_NONE ? "UNMAP" : "MAP",
360 iova, iova + iotlb->addr_mask);
361
362 if (iotlb->target_as != &address_space_memory) {
363 error_report("Wrong target AS \"%s\", only system memory is allowed",
364 iotlb->target_as->name ? iotlb->target_as->name : "none");
365 return;
366 }
367
368 rcu_read_lock();
369
370 if ((iotlb->perm & IOMMU_RW) != IOMMU_NONE) {
371 if (!vfio_get_vaddr(iotlb, &vaddr, &read_only)) {
372 goto out;
373 }
374
375
376
377
378
379
380
381 ret = vfio_dma_map(container, iova,
382 iotlb->addr_mask + 1, vaddr,
383 read_only);
384 if (ret) {
385 error_report("vfio_dma_map(%p, 0x%"HWADDR_PRIx", "
386 "0x%"HWADDR_PRIx", %p) = %d (%m)",
387 container, iova,
388 iotlb->addr_mask + 1, vaddr, ret);
389 }
390 } else {
391 ret = vfio_dma_unmap(container, iova, iotlb->addr_mask + 1);
392 if (ret) {
393 error_report("vfio_dma_unmap(%p, 0x%"HWADDR_PRIx", "
394 "0x%"HWADDR_PRIx") = %d (%m)",
395 container, iova,
396 iotlb->addr_mask + 1, ret);
397 }
398 }
399out:
400 rcu_read_unlock();
401}
402
403static void vfio_listener_region_add(MemoryListener *listener,
404 MemoryRegionSection *section)
405{
406 VFIOContainer *container = container_of(listener, VFIOContainer, listener);
407 hwaddr iova, end;
408 Int128 llend, llsize;
409 void *vaddr;
410 int ret;
411 VFIOHostDMAWindow *hostwin;
412 bool hostwin_found;
413
414 if (vfio_listener_skipped_section(section)) {
415 trace_vfio_listener_region_add_skip(
416 section->offset_within_address_space,
417 section->offset_within_address_space +
418 int128_get64(int128_sub(section->size, int128_one())));
419 return;
420 }
421
422 if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) !=
423 (section->offset_within_region & ~TARGET_PAGE_MASK))) {
424 error_report("%s received unaligned region", __func__);
425 return;
426 }
427
428 iova = TARGET_PAGE_ALIGN(section->offset_within_address_space);
429 llend = int128_make64(section->offset_within_address_space);
430 llend = int128_add(llend, section->size);
431 llend = int128_and(llend, int128_exts64(TARGET_PAGE_MASK));
432
433 if (int128_ge(int128_make64(iova), llend)) {
434 return;
435 }
436 end = int128_get64(int128_sub(llend, int128_one()));
437
438 if (container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU) {
439 hwaddr pgsize = 0;
440
441
442 QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) {
443 if (ranges_overlap(hostwin->min_iova,
444 hostwin->max_iova - hostwin->min_iova + 1,
445 section->offset_within_address_space,
446 int128_get64(section->size))) {
447 ret = -1;
448 goto fail;
449 }
450 }
451
452 ret = vfio_spapr_create_window(container, section, &pgsize);
453 if (ret) {
454 goto fail;
455 }
456
457 vfio_host_win_add(container, section->offset_within_address_space,
458 section->offset_within_address_space +
459 int128_get64(section->size) - 1, pgsize);
460#ifdef CONFIG_KVM
461 if (kvm_enabled()) {
462 VFIOGroup *group;
463 IOMMUMemoryRegion *iommu_mr = IOMMU_MEMORY_REGION(section->mr);
464 struct kvm_vfio_spapr_tce param;
465 struct kvm_device_attr attr = {
466 .group = KVM_DEV_VFIO_GROUP,
467 .attr = KVM_DEV_VFIO_GROUP_SET_SPAPR_TCE,
468 .addr = (uint64_t)(unsigned long)¶m,
469 };
470
471 if (!memory_region_iommu_get_attr(iommu_mr, IOMMU_ATTR_SPAPR_TCE_FD,
472 ¶m.tablefd)) {
473 QLIST_FOREACH(group, &container->group_list, container_next) {
474 param.groupfd = group->fd;
475 if (ioctl(vfio_kvm_device_fd, KVM_SET_DEVICE_ATTR, &attr)) {
476 error_report("vfio: failed to setup fd %d "
477 "for a group with fd %d: %s",
478 param.tablefd, param.groupfd,
479 strerror(errno));
480 return;
481 }
482 trace_vfio_spapr_group_attach(param.groupfd, param.tablefd);
483 }
484 }
485 }
486#endif
487 }
488
489 hostwin_found = false;
490 QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) {
491 if (hostwin->min_iova <= iova && end <= hostwin->max_iova) {
492 hostwin_found = true;
493 break;
494 }
495 }
496
497 if (!hostwin_found) {
498 error_report("vfio: IOMMU container %p can't map guest IOVA region"
499 " 0x%"HWADDR_PRIx"..0x%"HWADDR_PRIx,
500 container, iova, end);
501 ret = -EFAULT;
502 goto fail;
503 }
504
505 memory_region_ref(section->mr);
506
507 if (memory_region_is_iommu(section->mr)) {
508 VFIOGuestIOMMU *giommu;
509 IOMMUMemoryRegion *iommu_mr = IOMMU_MEMORY_REGION(section->mr);
510 int iommu_idx;
511
512 trace_vfio_listener_region_add_iommu(iova, end);
513
514
515
516
517
518
519 giommu = g_malloc0(sizeof(*giommu));
520 giommu->iommu = iommu_mr;
521 giommu->iommu_offset = section->offset_within_address_space -
522 section->offset_within_region;
523 giommu->container = container;
524 llend = int128_add(int128_make64(section->offset_within_region),
525 section->size);
526 llend = int128_sub(llend, int128_one());
527 iommu_idx = memory_region_iommu_attrs_to_index(iommu_mr,
528 MEMTXATTRS_UNSPECIFIED);
529 iommu_notifier_init(&giommu->n, vfio_iommu_map_notify,
530 IOMMU_NOTIFIER_ALL,
531 section->offset_within_region,
532 int128_get64(llend),
533 iommu_idx);
534 QLIST_INSERT_HEAD(&container->giommu_list, giommu, giommu_next);
535
536 memory_region_register_iommu_notifier(section->mr, &giommu->n);
537 memory_region_iommu_replay(giommu->iommu, &giommu->n);
538
539 return;
540 }
541
542
543
544 vaddr = memory_region_get_ram_ptr(section->mr) +
545 section->offset_within_region +
546 (iova - section->offset_within_address_space);
547
548 trace_vfio_listener_region_add_ram(iova, end, vaddr);
549
550 llsize = int128_sub(llend, int128_make64(iova));
551
552 if (memory_region_is_ram_device(section->mr)) {
553 hwaddr pgmask = (1ULL << ctz64(hostwin->iova_pgsizes)) - 1;
554
555 if ((iova & pgmask) || (int128_get64(llsize) & pgmask)) {
556 trace_vfio_listener_region_add_no_dma_map(
557 memory_region_name(section->mr),
558 section->offset_within_address_space,
559 int128_getlo(section->size),
560 pgmask + 1);
561 return;
562 }
563 }
564
565 ret = vfio_dma_map(container, iova, int128_get64(llsize),
566 vaddr, section->readonly);
567 if (ret) {
568 error_report("vfio_dma_map(%p, 0x%"HWADDR_PRIx", "
569 "0x%"HWADDR_PRIx", %p) = %d (%m)",
570 container, iova, int128_get64(llsize), vaddr, ret);
571 if (memory_region_is_ram_device(section->mr)) {
572
573 return;
574 }
575 goto fail;
576 }
577
578 return;
579
580fail:
581 if (memory_region_is_ram_device(section->mr)) {
582 error_report("failed to vfio_dma_map. pci p2p may not work");
583 return;
584 }
585
586
587
588
589
590 if (!container->initialized) {
591 if (!container->error) {
592 container->error = ret;
593 }
594 } else {
595 hw_error("vfio: DMA mapping failed, unable to continue");
596 }
597}
598
599static void vfio_listener_region_del(MemoryListener *listener,
600 MemoryRegionSection *section)
601{
602 VFIOContainer *container = container_of(listener, VFIOContainer, listener);
603 hwaddr iova, end;
604 Int128 llend, llsize;
605 int ret;
606 bool try_unmap = true;
607
608 if (vfio_listener_skipped_section(section)) {
609 trace_vfio_listener_region_del_skip(
610 section->offset_within_address_space,
611 section->offset_within_address_space +
612 int128_get64(int128_sub(section->size, int128_one())));
613 return;
614 }
615
616 if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) !=
617 (section->offset_within_region & ~TARGET_PAGE_MASK))) {
618 error_report("%s received unaligned region", __func__);
619 return;
620 }
621
622 if (memory_region_is_iommu(section->mr)) {
623 VFIOGuestIOMMU *giommu;
624
625 QLIST_FOREACH(giommu, &container->giommu_list, giommu_next) {
626 if (MEMORY_REGION(giommu->iommu) == section->mr &&
627 giommu->n.start == section->offset_within_region) {
628 memory_region_unregister_iommu_notifier(section->mr,
629 &giommu->n);
630 QLIST_REMOVE(giommu, giommu_next);
631 g_free(giommu);
632 break;
633 }
634 }
635
636
637
638
639
640
641
642
643 }
644
645 iova = TARGET_PAGE_ALIGN(section->offset_within_address_space);
646 llend = int128_make64(section->offset_within_address_space);
647 llend = int128_add(llend, section->size);
648 llend = int128_and(llend, int128_exts64(TARGET_PAGE_MASK));
649
650 if (int128_ge(int128_make64(iova), llend)) {
651 return;
652 }
653 end = int128_get64(int128_sub(llend, int128_one()));
654
655 llsize = int128_sub(llend, int128_make64(iova));
656
657 trace_vfio_listener_region_del(iova, end);
658
659 if (memory_region_is_ram_device(section->mr)) {
660 hwaddr pgmask;
661 VFIOHostDMAWindow *hostwin;
662 bool hostwin_found = false;
663
664 QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) {
665 if (hostwin->min_iova <= iova && end <= hostwin->max_iova) {
666 hostwin_found = true;
667 break;
668 }
669 }
670 assert(hostwin_found);
671
672 pgmask = (1ULL << ctz64(hostwin->iova_pgsizes)) - 1;
673 try_unmap = !((iova & pgmask) || (int128_get64(llsize) & pgmask));
674 }
675
676 if (try_unmap) {
677 ret = vfio_dma_unmap(container, iova, int128_get64(llsize));
678 if (ret) {
679 error_report("vfio_dma_unmap(%p, 0x%"HWADDR_PRIx", "
680 "0x%"HWADDR_PRIx") = %d (%m)",
681 container, iova, int128_get64(llsize), ret);
682 }
683 }
684
685 memory_region_unref(section->mr);
686
687 if (container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU) {
688 vfio_spapr_remove_window(container,
689 section->offset_within_address_space);
690 if (vfio_host_win_del(container,
691 section->offset_within_address_space,
692 section->offset_within_address_space +
693 int128_get64(section->size) - 1) < 0) {
694 hw_error("%s: Cannot delete missing window at %"HWADDR_PRIx,
695 __func__, section->offset_within_address_space);
696 }
697 }
698}
699
700static const MemoryListener vfio_memory_listener = {
701 .region_add = vfio_listener_region_add,
702 .region_del = vfio_listener_region_del,
703};
704
705static void vfio_listener_release(VFIOContainer *container)
706{
707 memory_listener_unregister(&container->listener);
708 if (container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU) {
709 memory_listener_unregister(&container->prereg_listener);
710 }
711}
712
713static struct vfio_info_cap_header *
714vfio_get_region_info_cap(struct vfio_region_info *info, uint16_t id)
715{
716 struct vfio_info_cap_header *hdr;
717 void *ptr = info;
718
719 if (!(info->flags & VFIO_REGION_INFO_FLAG_CAPS)) {
720 return NULL;
721 }
722
723 for (hdr = ptr + info->cap_offset; hdr != ptr; hdr = ptr + hdr->next) {
724 if (hdr->id == id) {
725 return hdr;
726 }
727 }
728
729 return NULL;
730}
731
732static int vfio_setup_region_sparse_mmaps(VFIORegion *region,
733 struct vfio_region_info *info)
734{
735 struct vfio_info_cap_header *hdr;
736 struct vfio_region_info_cap_sparse_mmap *sparse;
737 int i, j;
738
739 hdr = vfio_get_region_info_cap(info, VFIO_REGION_INFO_CAP_SPARSE_MMAP);
740 if (!hdr) {
741 return -ENODEV;
742 }
743
744 sparse = container_of(hdr, struct vfio_region_info_cap_sparse_mmap, header);
745
746 trace_vfio_region_sparse_mmap_header(region->vbasedev->name,
747 region->nr, sparse->nr_areas);
748
749 region->mmaps = g_new0(VFIOMmap, sparse->nr_areas);
750
751 for (i = 0, j = 0; i < sparse->nr_areas; i++) {
752 trace_vfio_region_sparse_mmap_entry(i, sparse->areas[i].offset,
753 sparse->areas[i].offset +
754 sparse->areas[i].size);
755
756 if (sparse->areas[i].size) {
757 region->mmaps[j].offset = sparse->areas[i].offset;
758 region->mmaps[j].size = sparse->areas[i].size;
759 j++;
760 }
761 }
762
763 region->nr_mmaps = j;
764 region->mmaps = g_realloc(region->mmaps, j * sizeof(VFIOMmap));
765
766 return 0;
767}
768
769int vfio_region_setup(Object *obj, VFIODevice *vbasedev, VFIORegion *region,
770 int index, const char *name)
771{
772 struct vfio_region_info *info;
773 int ret;
774
775 ret = vfio_get_region_info(vbasedev, index, &info);
776 if (ret) {
777 return ret;
778 }
779
780 region->vbasedev = vbasedev;
781 region->flags = info->flags;
782 region->size = info->size;
783 region->fd_offset = info->offset;
784 region->nr = index;
785
786 if (region->size) {
787 region->mem = g_new0(MemoryRegion, 1);
788 memory_region_init_io(region->mem, obj, &vfio_region_ops,
789 region, name, region->size);
790
791 if (!vbasedev->no_mmap &&
792 region->flags & VFIO_REGION_INFO_FLAG_MMAP) {
793
794 ret = vfio_setup_region_sparse_mmaps(region, info);
795
796 if (ret) {
797 region->nr_mmaps = 1;
798 region->mmaps = g_new0(VFIOMmap, region->nr_mmaps);
799 region->mmaps[0].offset = 0;
800 region->mmaps[0].size = region->size;
801 }
802 }
803 }
804
805 g_free(info);
806
807 trace_vfio_region_setup(vbasedev->name, index, name,
808 region->flags, region->fd_offset, region->size);
809 return 0;
810}
811
812int vfio_region_mmap(VFIORegion *region)
813{
814 int i, prot = 0;
815 char *name;
816
817 if (!region->mem) {
818 return 0;
819 }
820
821 prot |= region->flags & VFIO_REGION_INFO_FLAG_READ ? PROT_READ : 0;
822 prot |= region->flags & VFIO_REGION_INFO_FLAG_WRITE ? PROT_WRITE : 0;
823
824 for (i = 0; i < region->nr_mmaps; i++) {
825 region->mmaps[i].mmap = mmap(NULL, region->mmaps[i].size, prot,
826 MAP_SHARED, region->vbasedev->fd,
827 region->fd_offset +
828 region->mmaps[i].offset);
829 if (region->mmaps[i].mmap == MAP_FAILED) {
830 int ret = -errno;
831
832 trace_vfio_region_mmap_fault(memory_region_name(region->mem), i,
833 region->fd_offset +
834 region->mmaps[i].offset,
835 region->fd_offset +
836 region->mmaps[i].offset +
837 region->mmaps[i].size - 1, ret);
838
839 region->mmaps[i].mmap = NULL;
840
841 for (i--; i >= 0; i--) {
842 memory_region_del_subregion(region->mem, ®ion->mmaps[i].mem);
843 munmap(region->mmaps[i].mmap, region->mmaps[i].size);
844 object_unparent(OBJECT(®ion->mmaps[i].mem));
845 region->mmaps[i].mmap = NULL;
846 }
847
848 return ret;
849 }
850
851 name = g_strdup_printf("%s mmaps[%d]",
852 memory_region_name(region->mem), i);
853 memory_region_init_ram_device_ptr(®ion->mmaps[i].mem,
854 memory_region_owner(region->mem),
855 name, region->mmaps[i].size,
856 region->mmaps[i].mmap);
857 g_free(name);
858 memory_region_add_subregion(region->mem, region->mmaps[i].offset,
859 ®ion->mmaps[i].mem);
860
861 trace_vfio_region_mmap(memory_region_name(®ion->mmaps[i].mem),
862 region->mmaps[i].offset,
863 region->mmaps[i].offset +
864 region->mmaps[i].size - 1);
865 }
866
867 return 0;
868}
869
870void vfio_region_exit(VFIORegion *region)
871{
872 int i;
873
874 if (!region->mem) {
875 return;
876 }
877
878 for (i = 0; i < region->nr_mmaps; i++) {
879 if (region->mmaps[i].mmap) {
880 memory_region_del_subregion(region->mem, ®ion->mmaps[i].mem);
881 }
882 }
883
884 trace_vfio_region_exit(region->vbasedev->name, region->nr);
885}
886
887void vfio_region_finalize(VFIORegion *region)
888{
889 int i;
890
891 if (!region->mem) {
892 return;
893 }
894
895 for (i = 0; i < region->nr_mmaps; i++) {
896 if (region->mmaps[i].mmap) {
897 munmap(region->mmaps[i].mmap, region->mmaps[i].size);
898 object_unparent(OBJECT(®ion->mmaps[i].mem));
899 }
900 }
901
902 object_unparent(OBJECT(region->mem));
903
904 g_free(region->mem);
905 g_free(region->mmaps);
906
907 trace_vfio_region_finalize(region->vbasedev->name, region->nr);
908
909 region->mem = NULL;
910 region->mmaps = NULL;
911 region->nr_mmaps = 0;
912 region->size = 0;
913 region->flags = 0;
914 region->nr = 0;
915}
916
917void vfio_region_mmaps_set_enabled(VFIORegion *region, bool enabled)
918{
919 int i;
920
921 if (!region->mem) {
922 return;
923 }
924
925 for (i = 0; i < region->nr_mmaps; i++) {
926 if (region->mmaps[i].mmap) {
927 memory_region_set_enabled(®ion->mmaps[i].mem, enabled);
928 }
929 }
930
931 trace_vfio_region_mmaps_set_enabled(memory_region_name(region->mem),
932 enabled);
933}
934
935void vfio_reset_handler(void *opaque)
936{
937 VFIOGroup *group;
938 VFIODevice *vbasedev;
939
940 QLIST_FOREACH(group, &vfio_group_list, next) {
941 QLIST_FOREACH(vbasedev, &group->device_list, next) {
942 if (vbasedev->dev->realized) {
943 vbasedev->ops->vfio_compute_needs_reset(vbasedev);
944 }
945 }
946 }
947
948 QLIST_FOREACH(group, &vfio_group_list, next) {
949 QLIST_FOREACH(vbasedev, &group->device_list, next) {
950 if (vbasedev->dev->realized && vbasedev->needs_reset) {
951 vbasedev->ops->vfio_hot_reset_multi(vbasedev);
952 }
953 }
954 }
955}
956
957static void vfio_kvm_device_add_group(VFIOGroup *group)
958{
959#ifdef CONFIG_KVM
960 struct kvm_device_attr attr = {
961 .group = KVM_DEV_VFIO_GROUP,
962 .attr = KVM_DEV_VFIO_GROUP_ADD,
963 .addr = (uint64_t)(unsigned long)&group->fd,
964 };
965
966 if (!kvm_enabled()) {
967 return;
968 }
969
970 if (vfio_kvm_device_fd < 0) {
971 struct kvm_create_device cd = {
972 .type = KVM_DEV_TYPE_VFIO,
973 };
974
975 if (kvm_vm_ioctl(kvm_state, KVM_CREATE_DEVICE, &cd)) {
976 error_report("Failed to create KVM VFIO device: %m");
977 return;
978 }
979
980 vfio_kvm_device_fd = cd.fd;
981 }
982
983 if (ioctl(vfio_kvm_device_fd, KVM_SET_DEVICE_ATTR, &attr)) {
984 error_report("Failed to add group %d to KVM VFIO device: %m",
985 group->groupid);
986 }
987#endif
988}
989
990static void vfio_kvm_device_del_group(VFIOGroup *group)
991{
992#ifdef CONFIG_KVM
993 struct kvm_device_attr attr = {
994 .group = KVM_DEV_VFIO_GROUP,
995 .attr = KVM_DEV_VFIO_GROUP_DEL,
996 .addr = (uint64_t)(unsigned long)&group->fd,
997 };
998
999 if (vfio_kvm_device_fd < 0) {
1000 return;
1001 }
1002
1003 if (ioctl(vfio_kvm_device_fd, KVM_SET_DEVICE_ATTR, &attr)) {
1004 error_report("Failed to remove group %d from KVM VFIO device: %m",
1005 group->groupid);
1006 }
1007#endif
1008}
1009
1010static VFIOAddressSpace *vfio_get_address_space(AddressSpace *as)
1011{
1012 VFIOAddressSpace *space;
1013
1014 QLIST_FOREACH(space, &vfio_address_spaces, list) {
1015 if (space->as == as) {
1016 return space;
1017 }
1018 }
1019
1020
1021 space = g_malloc0(sizeof(*space));
1022 space->as = as;
1023 QLIST_INIT(&space->containers);
1024
1025 QLIST_INSERT_HEAD(&vfio_address_spaces, space, list);
1026
1027 return space;
1028}
1029
1030static void vfio_put_address_space(VFIOAddressSpace *space)
1031{
1032 if (QLIST_EMPTY(&space->containers)) {
1033 QLIST_REMOVE(space, list);
1034 g_free(space);
1035 }
1036}
1037
1038static int vfio_connect_container(VFIOGroup *group, AddressSpace *as,
1039 Error **errp)
1040{
1041 VFIOContainer *container;
1042 int ret, fd;
1043 VFIOAddressSpace *space;
1044
1045 space = vfio_get_address_space(as);
1046
1047 QLIST_FOREACH(container, &space->containers, next) {
1048 if (!ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &container->fd)) {
1049 group->container = container;
1050 QLIST_INSERT_HEAD(&container->group_list, group, container_next);
1051 vfio_kvm_device_add_group(group);
1052 return 0;
1053 }
1054 }
1055
1056 fd = qemu_open("/dev/vfio/vfio", O_RDWR);
1057 if (fd < 0) {
1058 error_setg_errno(errp, errno, "failed to open /dev/vfio/vfio");
1059 ret = -errno;
1060 goto put_space_exit;
1061 }
1062
1063 ret = ioctl(fd, VFIO_GET_API_VERSION);
1064 if (ret != VFIO_API_VERSION) {
1065 error_setg(errp, "supported vfio version: %d, "
1066 "reported version: %d", VFIO_API_VERSION, ret);
1067 ret = -EINVAL;
1068 goto close_fd_exit;
1069 }
1070
1071 container = g_malloc0(sizeof(*container));
1072 container->space = space;
1073 container->fd = fd;
1074 QLIST_INIT(&container->giommu_list);
1075 QLIST_INIT(&container->hostwin_list);
1076 if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1_IOMMU) ||
1077 ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1v2_IOMMU)) {
1078 bool v2 = !!ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1v2_IOMMU);
1079 struct vfio_iommu_type1_info info;
1080
1081 ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd);
1082 if (ret) {
1083 error_setg_errno(errp, errno, "failed to set group container");
1084 ret = -errno;
1085 goto free_container_exit;
1086 }
1087
1088 container->iommu_type = v2 ? VFIO_TYPE1v2_IOMMU : VFIO_TYPE1_IOMMU;
1089 ret = ioctl(fd, VFIO_SET_IOMMU, container->iommu_type);
1090 if (ret) {
1091 error_setg_errno(errp, errno, "failed to set iommu for container");
1092 ret = -errno;
1093 goto free_container_exit;
1094 }
1095
1096
1097
1098
1099
1100
1101
1102
1103 info.argsz = sizeof(info);
1104 ret = ioctl(fd, VFIO_IOMMU_GET_INFO, &info);
1105
1106 if (ret || !(info.flags & VFIO_IOMMU_INFO_PGSIZES)) {
1107
1108 info.iova_pgsizes = 4096;
1109 }
1110 vfio_host_win_add(container, 0, (hwaddr)-1, info.iova_pgsizes);
1111 } else if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_IOMMU) ||
1112 ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_v2_IOMMU)) {
1113 struct vfio_iommu_spapr_tce_info info;
1114 bool v2 = !!ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_v2_IOMMU);
1115
1116 ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd);
1117 if (ret) {
1118 error_setg_errno(errp, errno, "failed to set group container");
1119 ret = -errno;
1120 goto free_container_exit;
1121 }
1122 container->iommu_type =
1123 v2 ? VFIO_SPAPR_TCE_v2_IOMMU : VFIO_SPAPR_TCE_IOMMU;
1124 ret = ioctl(fd, VFIO_SET_IOMMU, container->iommu_type);
1125 if (ret) {
1126 container->iommu_type = VFIO_SPAPR_TCE_IOMMU;
1127 v2 = false;
1128 ret = ioctl(fd, VFIO_SET_IOMMU, container->iommu_type);
1129 }
1130 if (ret) {
1131 error_setg_errno(errp, errno, "failed to set iommu for container");
1132 ret = -errno;
1133 goto free_container_exit;
1134 }
1135
1136
1137
1138
1139
1140
1141 if (!v2) {
1142 ret = ioctl(fd, VFIO_IOMMU_ENABLE);
1143 if (ret) {
1144 error_setg_errno(errp, errno, "failed to enable container");
1145 ret = -errno;
1146 goto free_container_exit;
1147 }
1148 } else {
1149 container->prereg_listener = vfio_prereg_listener;
1150
1151 memory_listener_register(&container->prereg_listener,
1152 &address_space_memory);
1153 if (container->error) {
1154 memory_listener_unregister(&container->prereg_listener);
1155 ret = container->error;
1156 error_setg(errp,
1157 "RAM memory listener initialization failed for container");
1158 goto free_container_exit;
1159 }
1160 }
1161
1162 info.argsz = sizeof(info);
1163 ret = ioctl(fd, VFIO_IOMMU_SPAPR_TCE_GET_INFO, &info);
1164 if (ret) {
1165 error_setg_errno(errp, errno,
1166 "VFIO_IOMMU_SPAPR_TCE_GET_INFO failed");
1167 ret = -errno;
1168 if (v2) {
1169 memory_listener_unregister(&container->prereg_listener);
1170 }
1171 goto free_container_exit;
1172 }
1173
1174 if (v2) {
1175
1176
1177
1178
1179
1180
1181 ret = vfio_spapr_remove_window(container, info.dma32_window_start);
1182 if (ret) {
1183 error_setg_errno(errp, -ret,
1184 "failed to remove existing window");
1185 goto free_container_exit;
1186 }
1187 } else {
1188
1189 vfio_host_win_add(container, info.dma32_window_start,
1190 info.dma32_window_start +
1191 info.dma32_window_size - 1,
1192 0x1000);
1193 }
1194 } else {
1195 error_setg(errp, "No available IOMMU models");
1196 ret = -EINVAL;
1197 goto free_container_exit;
1198 }
1199
1200 vfio_kvm_device_add_group(group);
1201
1202 QLIST_INIT(&container->group_list);
1203 QLIST_INSERT_HEAD(&space->containers, container, next);
1204
1205 group->container = container;
1206 QLIST_INSERT_HEAD(&container->group_list, group, container_next);
1207
1208 container->listener = vfio_memory_listener;
1209
1210 memory_listener_register(&container->listener, container->space->as);
1211
1212 if (container->error) {
1213 ret = container->error;
1214 error_setg_errno(errp, -ret,
1215 "memory listener initialization failed for container");
1216 goto listener_release_exit;
1217 }
1218
1219 container->initialized = true;
1220
1221 return 0;
1222listener_release_exit:
1223 QLIST_REMOVE(group, container_next);
1224 QLIST_REMOVE(container, next);
1225 vfio_kvm_device_del_group(group);
1226 vfio_listener_release(container);
1227
1228free_container_exit:
1229 g_free(container);
1230
1231close_fd_exit:
1232 close(fd);
1233
1234put_space_exit:
1235 vfio_put_address_space(space);
1236
1237 return ret;
1238}
1239
1240static void vfio_disconnect_container(VFIOGroup *group)
1241{
1242 VFIOContainer *container = group->container;
1243
1244 QLIST_REMOVE(group, container_next);
1245 group->container = NULL;
1246
1247
1248
1249
1250
1251
1252 if (QLIST_EMPTY(&container->group_list)) {
1253 vfio_listener_release(container);
1254 }
1255
1256 if (ioctl(group->fd, VFIO_GROUP_UNSET_CONTAINER, &container->fd)) {
1257 error_report("vfio: error disconnecting group %d from container",
1258 group->groupid);
1259 }
1260
1261 if (QLIST_EMPTY(&container->group_list)) {
1262 VFIOAddressSpace *space = container->space;
1263 VFIOGuestIOMMU *giommu, *tmp;
1264
1265 QLIST_REMOVE(container, next);
1266
1267 QLIST_FOREACH_SAFE(giommu, &container->giommu_list, giommu_next, tmp) {
1268 memory_region_unregister_iommu_notifier(
1269 MEMORY_REGION(giommu->iommu), &giommu->n);
1270 QLIST_REMOVE(giommu, giommu_next);
1271 g_free(giommu);
1272 }
1273
1274 trace_vfio_disconnect_container(container->fd);
1275 close(container->fd);
1276 g_free(container);
1277
1278 vfio_put_address_space(space);
1279 }
1280}
1281
1282VFIOGroup *vfio_get_group(int groupid, AddressSpace *as, Error **errp)
1283{
1284 VFIOGroup *group;
1285 char path[32];
1286 struct vfio_group_status status = { .argsz = sizeof(status) };
1287
1288 QLIST_FOREACH(group, &vfio_group_list, next) {
1289 if (group->groupid == groupid) {
1290
1291 if (group->container->space->as == as) {
1292 return group;
1293 } else {
1294 error_setg(errp, "group %d used in multiple address spaces",
1295 group->groupid);
1296 return NULL;
1297 }
1298 }
1299 }
1300
1301 group = g_malloc0(sizeof(*group));
1302
1303 snprintf(path, sizeof(path), "/dev/vfio/%d", groupid);
1304 group->fd = qemu_open(path, O_RDWR);
1305 if (group->fd < 0) {
1306 error_setg_errno(errp, errno, "failed to open %s", path);
1307 goto free_group_exit;
1308 }
1309
1310 if (ioctl(group->fd, VFIO_GROUP_GET_STATUS, &status)) {
1311 error_setg_errno(errp, errno, "failed to get group %d status", groupid);
1312 goto close_fd_exit;
1313 }
1314
1315 if (!(status.flags & VFIO_GROUP_FLAGS_VIABLE)) {
1316 error_setg(errp, "group %d is not viable", groupid);
1317 error_append_hint(errp,
1318 "Please ensure all devices within the iommu_group "
1319 "are bound to their vfio bus driver.\n");
1320 goto close_fd_exit;
1321 }
1322
1323 group->groupid = groupid;
1324 QLIST_INIT(&group->device_list);
1325
1326 if (vfio_connect_container(group, as, errp)) {
1327 error_prepend(errp, "failed to setup container for group %d: ",
1328 groupid);
1329 goto close_fd_exit;
1330 }
1331
1332 if (QLIST_EMPTY(&vfio_group_list)) {
1333 qemu_register_reset(vfio_reset_handler, NULL);
1334 }
1335
1336 QLIST_INSERT_HEAD(&vfio_group_list, group, next);
1337
1338 return group;
1339
1340close_fd_exit:
1341 close(group->fd);
1342
1343free_group_exit:
1344 g_free(group);
1345
1346 return NULL;
1347}
1348
1349void vfio_put_group(VFIOGroup *group)
1350{
1351 if (!group || !QLIST_EMPTY(&group->device_list)) {
1352 return;
1353 }
1354
1355 vfio_kvm_device_del_group(group);
1356 vfio_disconnect_container(group);
1357 QLIST_REMOVE(group, next);
1358 trace_vfio_put_group(group->fd);
1359 close(group->fd);
1360 g_free(group);
1361
1362 if (QLIST_EMPTY(&vfio_group_list)) {
1363 qemu_unregister_reset(vfio_reset_handler, NULL);
1364 }
1365}
1366
1367int vfio_get_device(VFIOGroup *group, const char *name,
1368 VFIODevice *vbasedev, Error **errp)
1369{
1370 struct vfio_device_info dev_info = { .argsz = sizeof(dev_info) };
1371 int ret, fd;
1372
1373 fd = ioctl(group->fd, VFIO_GROUP_GET_DEVICE_FD, name);
1374 if (fd < 0) {
1375 error_setg_errno(errp, errno, "error getting device from group %d",
1376 group->groupid);
1377 error_append_hint(errp,
1378 "Verify all devices in group %d are bound to vfio-<bus> "
1379 "or pci-stub and not already in use\n", group->groupid);
1380 return fd;
1381 }
1382
1383 ret = ioctl(fd, VFIO_DEVICE_GET_INFO, &dev_info);
1384 if (ret) {
1385 error_setg_errno(errp, errno, "error getting device info");
1386 close(fd);
1387 return ret;
1388 }
1389
1390 vbasedev->fd = fd;
1391 vbasedev->group = group;
1392 QLIST_INSERT_HEAD(&group->device_list, vbasedev, next);
1393
1394 vbasedev->num_irqs = dev_info.num_irqs;
1395 vbasedev->num_regions = dev_info.num_regions;
1396 vbasedev->flags = dev_info.flags;
1397
1398 trace_vfio_get_device(name, dev_info.flags, dev_info.num_regions,
1399 dev_info.num_irqs);
1400
1401 vbasedev->reset_works = !!(dev_info.flags & VFIO_DEVICE_FLAGS_RESET);
1402 return 0;
1403}
1404
1405void vfio_put_base_device(VFIODevice *vbasedev)
1406{
1407 if (!vbasedev->group) {
1408 return;
1409 }
1410 QLIST_REMOVE(vbasedev, next);
1411 vbasedev->group = NULL;
1412 trace_vfio_put_base_device(vbasedev->fd);
1413 close(vbasedev->fd);
1414}
1415
1416int vfio_get_region_info(VFIODevice *vbasedev, int index,
1417 struct vfio_region_info **info)
1418{
1419 size_t argsz = sizeof(struct vfio_region_info);
1420
1421 *info = g_malloc0(argsz);
1422
1423 (*info)->index = index;
1424retry:
1425 (*info)->argsz = argsz;
1426
1427 if (ioctl(vbasedev->fd, VFIO_DEVICE_GET_REGION_INFO, *info)) {
1428 g_free(*info);
1429 *info = NULL;
1430 return -errno;
1431 }
1432
1433 if ((*info)->argsz > argsz) {
1434 argsz = (*info)->argsz;
1435 *info = g_realloc(*info, argsz);
1436
1437 goto retry;
1438 }
1439
1440 return 0;
1441}
1442
1443int vfio_get_dev_region_info(VFIODevice *vbasedev, uint32_t type,
1444 uint32_t subtype, struct vfio_region_info **info)
1445{
1446 int i;
1447
1448 for (i = 0; i < vbasedev->num_regions; i++) {
1449 struct vfio_info_cap_header *hdr;
1450 struct vfio_region_info_cap_type *cap_type;
1451
1452 if (vfio_get_region_info(vbasedev, i, info)) {
1453 continue;
1454 }
1455
1456 hdr = vfio_get_region_info_cap(*info, VFIO_REGION_INFO_CAP_TYPE);
1457 if (!hdr) {
1458 g_free(*info);
1459 continue;
1460 }
1461
1462 cap_type = container_of(hdr, struct vfio_region_info_cap_type, header);
1463
1464 trace_vfio_get_dev_region(vbasedev->name, i,
1465 cap_type->type, cap_type->subtype);
1466
1467 if (cap_type->type == type && cap_type->subtype == subtype) {
1468 return 0;
1469 }
1470
1471 g_free(*info);
1472 }
1473
1474 *info = NULL;
1475 return -ENODEV;
1476}
1477
1478bool vfio_has_region_cap(VFIODevice *vbasedev, int region, uint16_t cap_type)
1479{
1480 struct vfio_region_info *info = NULL;
1481 bool ret = false;
1482
1483 if (!vfio_get_region_info(vbasedev, region, &info)) {
1484 if (vfio_get_region_info_cap(info, cap_type)) {
1485 ret = true;
1486 }
1487 g_free(info);
1488 }
1489
1490 return ret;
1491}
1492
1493
1494
1495
1496static bool vfio_eeh_container_ok(VFIOContainer *container)
1497{
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513 if (QLIST_EMPTY(&container->group_list)) {
1514 return false;
1515 }
1516
1517 if (QLIST_NEXT(QLIST_FIRST(&container->group_list), container_next)) {
1518 return false;
1519 }
1520
1521 return true;
1522}
1523
1524static int vfio_eeh_container_op(VFIOContainer *container, uint32_t op)
1525{
1526 struct vfio_eeh_pe_op pe_op = {
1527 .argsz = sizeof(pe_op),
1528 .op = op,
1529 };
1530 int ret;
1531
1532 if (!vfio_eeh_container_ok(container)) {
1533 error_report("vfio/eeh: EEH_PE_OP 0x%x: "
1534 "kernel requires a container with exactly one group", op);
1535 return -EPERM;
1536 }
1537
1538 ret = ioctl(container->fd, VFIO_EEH_PE_OP, &pe_op);
1539 if (ret < 0) {
1540 error_report("vfio/eeh: EEH_PE_OP 0x%x failed: %m", op);
1541 return -errno;
1542 }
1543
1544 return ret;
1545}
1546
1547static VFIOContainer *vfio_eeh_as_container(AddressSpace *as)
1548{
1549 VFIOAddressSpace *space = vfio_get_address_space(as);
1550 VFIOContainer *container = NULL;
1551
1552 if (QLIST_EMPTY(&space->containers)) {
1553
1554 goto out;
1555 }
1556
1557 container = QLIST_FIRST(&space->containers);
1558
1559 if (QLIST_NEXT(container, next)) {
1560
1561
1562 container = NULL;
1563 goto out;
1564 }
1565
1566out:
1567 vfio_put_address_space(space);
1568 return container;
1569}
1570
1571bool vfio_eeh_as_ok(AddressSpace *as)
1572{
1573 VFIOContainer *container = vfio_eeh_as_container(as);
1574
1575 return (container != NULL) && vfio_eeh_container_ok(container);
1576}
1577
1578int vfio_eeh_as_op(AddressSpace *as, uint32_t op)
1579{
1580 VFIOContainer *container = vfio_eeh_as_container(as);
1581
1582 if (!container) {
1583 return -ENODEV;
1584 }
1585 return vfio_eeh_container_op(container, op);
1586}
1587