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