2 * generic functions used by VFIO devices
4 * Copyright Red Hat, Inc. 2012
7 * Alex Williamson <alex.williamson@redhat.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
12 * Based on qemu-kvm device-assignment:
13 * Adapted for KVM by Qumranet.
14 * Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com)
15 * Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com)
16 * Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com)
17 * Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com)
18 * Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com)
21 #include "qemu/osdep.h"
22 #include <sys/ioctl.h>
24 #include <linux/kvm.h>
26 #include <linux/vfio.h>
28 #include "hw/vfio/vfio-common.h"
29 #include "hw/vfio/pci.h"
30 #include "exec/address-spaces.h"
31 #include "exec/memory.h"
32 #include "exec/ram_addr.h"
34 #include "qemu/error-report.h"
35 #include "qemu/main-loop.h"
36 #include "qemu/range.h"
37 #include "sysemu/kvm.h"
38 #include "sysemu/reset.h"
39 #include "sysemu/runstate.h"
41 #include "qapi/error.h"
42 #include "migration/misc.h"
43 #include "migration/blocker.h"
44 #include "migration/qemu-file.h"
45 #include "sysemu/tpm.h"
47 VFIODeviceList vfio_device_list
=
48 QLIST_HEAD_INITIALIZER(vfio_device_list
);
49 static QLIST_HEAD(, VFIOAddressSpace
) vfio_address_spaces
=
50 QLIST_HEAD_INITIALIZER(vfio_address_spaces
);
54 * We have a single VFIO pseudo device per KVM VM. Once created it lives
55 * for the life of the VM. Closing the file descriptor only drops our
56 * reference to it and the device's reference to kvm. Therefore once
57 * initialized, this file descriptor is only released on QEMU exit and
58 * we'll re-use it should another vfio device be attached before then.
60 int vfio_kvm_device_fd
= -1;
64 * Device state interfaces
67 bool vfio_mig_active(void)
71 if (QLIST_EMPTY(&vfio_device_list
)) {
75 QLIST_FOREACH(vbasedev
, &vfio_device_list
, global_next
) {
76 if (vbasedev
->migration_blocker
) {
83 static Error
*multiple_devices_migration_blocker
;
86 * Multiple devices migration is allowed only if all devices support P2P
87 * migration. Single device migration is allowed regardless of P2P migration
90 static bool vfio_multiple_devices_migration_is_supported(void)
93 unsigned int device_num
= 0;
94 bool all_support_p2p
= true;
96 QLIST_FOREACH(vbasedev
, &vfio_device_list
, global_next
) {
97 if (vbasedev
->migration
) {
100 if (!(vbasedev
->migration
->mig_flags
& VFIO_MIGRATION_P2P
)) {
101 all_support_p2p
= false;
106 return all_support_p2p
|| device_num
<= 1;
109 int vfio_block_multiple_devices_migration(VFIODevice
*vbasedev
, Error
**errp
)
113 if (vfio_multiple_devices_migration_is_supported()) {
117 if (vbasedev
->enable_migration
== ON_OFF_AUTO_ON
) {
118 error_setg(errp
, "Multiple VFIO devices migration is supported only if "
119 "all of them support P2P migration");
123 if (multiple_devices_migration_blocker
) {
127 error_setg(&multiple_devices_migration_blocker
,
128 "Multiple VFIO devices migration is supported only if all of "
129 "them support P2P migration");
130 ret
= migrate_add_blocker_normal(&multiple_devices_migration_blocker
, errp
);
135 void vfio_unblock_multiple_devices_migration(void)
137 if (!multiple_devices_migration_blocker
||
138 !vfio_multiple_devices_migration_is_supported()) {
142 migrate_del_blocker(&multiple_devices_migration_blocker
);
145 bool vfio_viommu_preset(VFIODevice
*vbasedev
)
147 return vbasedev
->bcontainer
->space
->as
!= &address_space_memory
;
150 static void vfio_set_migration_error(int ret
)
152 if (migration_is_setup_or_active()) {
153 migration_file_set_error(ret
, NULL
);
157 bool vfio_device_state_is_running(VFIODevice
*vbasedev
)
159 VFIOMigration
*migration
= vbasedev
->migration
;
161 return migration
->device_state
== VFIO_DEVICE_STATE_RUNNING
||
162 migration
->device_state
== VFIO_DEVICE_STATE_RUNNING_P2P
;
165 bool vfio_device_state_is_precopy(VFIODevice
*vbasedev
)
167 VFIOMigration
*migration
= vbasedev
->migration
;
169 return migration
->device_state
== VFIO_DEVICE_STATE_PRE_COPY
||
170 migration
->device_state
== VFIO_DEVICE_STATE_PRE_COPY_P2P
;
173 static bool vfio_devices_all_dirty_tracking(VFIOContainerBase
*bcontainer
)
175 VFIODevice
*vbasedev
;
177 if (!migration_is_active() && !migration_is_device()) {
181 QLIST_FOREACH(vbasedev
, &bcontainer
->device_list
, container_next
) {
182 VFIOMigration
*migration
= vbasedev
->migration
;
188 if (vbasedev
->pre_copy_dirty_page_tracking
== ON_OFF_AUTO_OFF
&&
189 (vfio_device_state_is_running(vbasedev
) ||
190 vfio_device_state_is_precopy(vbasedev
))) {
197 bool vfio_devices_all_device_dirty_tracking(const VFIOContainerBase
*bcontainer
)
199 VFIODevice
*vbasedev
;
201 QLIST_FOREACH(vbasedev
, &bcontainer
->device_list
, container_next
) {
202 if (vbasedev
->device_dirty_page_tracking
== ON_OFF_AUTO_OFF
) {
205 if (!vbasedev
->dirty_pages_supported
) {
214 * Check if all VFIO devices are running and migration is active, which is
215 * essentially equivalent to the migration being in pre-copy phase.
218 vfio_devices_all_running_and_mig_active(const VFIOContainerBase
*bcontainer
)
220 VFIODevice
*vbasedev
;
222 if (!migration_is_active()) {
226 QLIST_FOREACH(vbasedev
, &bcontainer
->device_list
, container_next
) {
227 VFIOMigration
*migration
= vbasedev
->migration
;
233 if (vfio_device_state_is_running(vbasedev
) ||
234 vfio_device_state_is_precopy(vbasedev
)) {
243 static bool vfio_listener_skipped_section(MemoryRegionSection
*section
)
245 return (!memory_region_is_ram(section
->mr
) &&
246 !memory_region_is_iommu(section
->mr
)) ||
247 memory_region_is_protected(section
->mr
) ||
249 * Sizing an enabled 64-bit BAR can cause spurious mappings to
250 * addresses in the upper part of the 64-bit address space. These
251 * are never accessed by the CPU and beyond the address width of
252 * some IOMMU hardware. TODO: VFIO should tell us the IOMMU width.
254 section
->offset_within_address_space
& (1ULL << 63);
257 /* Called with rcu_read_lock held. */
258 static bool vfio_get_xlat_addr(IOMMUTLBEntry
*iotlb
, void **vaddr
,
259 ram_addr_t
*ram_addr
, bool *read_only
,
262 bool ret
, mr_has_discard_manager
;
264 ret
= memory_get_xlat_addr(iotlb
, vaddr
, ram_addr
, read_only
,
265 &mr_has_discard_manager
, errp
);
266 if (ret
&& mr_has_discard_manager
) {
268 * Malicious VMs might trigger discarding of IOMMU-mapped memory. The
269 * pages will remain pinned inside vfio until unmapped, resulting in a
270 * higher memory consumption than expected. If memory would get
271 * populated again later, there would be an inconsistency between pages
272 * pinned by vfio and pages seen by QEMU. This is the case until
273 * unmapped from the IOMMU (e.g., during device reset).
275 * With malicious guests, we really only care about pinning more memory
276 * than expected. RLIMIT_MEMLOCK set for the user/process can never be
277 * exceeded and can be used to mitigate this problem.
279 warn_report_once("Using vfio with vIOMMUs and coordinated discarding of"
280 " RAM (e.g., virtio-mem) works, however, malicious"
281 " guests can trigger pinning of more memory than"
282 " intended via an IOMMU. It's possible to mitigate "
283 " by setting/adjusting RLIMIT_MEMLOCK.");
288 static void vfio_iommu_map_notify(IOMMUNotifier
*n
, IOMMUTLBEntry
*iotlb
)
290 VFIOGuestIOMMU
*giommu
= container_of(n
, VFIOGuestIOMMU
, n
);
291 VFIOContainerBase
*bcontainer
= giommu
->bcontainer
;
292 hwaddr iova
= iotlb
->iova
+ giommu
->iommu_offset
;
295 Error
*local_err
= NULL
;
297 trace_vfio_iommu_map_notify(iotlb
->perm
== IOMMU_NONE
? "UNMAP" : "MAP",
298 iova
, iova
+ iotlb
->addr_mask
);
300 if (iotlb
->target_as
!= &address_space_memory
) {
301 error_report("Wrong target AS \"%s\", only system memory is allowed",
302 iotlb
->target_as
->name
? iotlb
->target_as
->name
: "none");
303 vfio_set_migration_error(-EINVAL
);
309 if ((iotlb
->perm
& IOMMU_RW
) != IOMMU_NONE
) {
312 if (!vfio_get_xlat_addr(iotlb
, &vaddr
, NULL
, &read_only
, &local_err
)) {
313 error_report_err(local_err
);
317 * vaddr is only valid until rcu_read_unlock(). But after
318 * vfio_dma_map has set up the mapping the pages will be
319 * pinned by the kernel. This makes sure that the RAM backend
320 * of vaddr will always be there, even if the memory object is
321 * destroyed and its backing memory munmap-ed.
323 ret
= vfio_container_dma_map(bcontainer
, iova
,
324 iotlb
->addr_mask
+ 1, vaddr
,
327 error_report("vfio_container_dma_map(%p, 0x%"HWADDR_PRIx
", "
328 "0x%"HWADDR_PRIx
", %p) = %d (%s)",
330 iotlb
->addr_mask
+ 1, vaddr
, ret
, strerror(-ret
));
333 ret
= vfio_container_dma_unmap(bcontainer
, iova
,
334 iotlb
->addr_mask
+ 1, iotlb
);
336 error_report("vfio_container_dma_unmap(%p, 0x%"HWADDR_PRIx
", "
337 "0x%"HWADDR_PRIx
") = %d (%s)",
339 iotlb
->addr_mask
+ 1, ret
, strerror(-ret
));
340 vfio_set_migration_error(ret
);
347 static void vfio_ram_discard_notify_discard(RamDiscardListener
*rdl
,
348 MemoryRegionSection
*section
)
350 VFIORamDiscardListener
*vrdl
= container_of(rdl
, VFIORamDiscardListener
,
352 VFIOContainerBase
*bcontainer
= vrdl
->bcontainer
;
353 const hwaddr size
= int128_get64(section
->size
);
354 const hwaddr iova
= section
->offset_within_address_space
;
357 /* Unmap with a single call. */
358 ret
= vfio_container_dma_unmap(bcontainer
, iova
, size
, NULL
);
360 error_report("%s: vfio_container_dma_unmap() failed: %s", __func__
,
365 static int vfio_ram_discard_notify_populate(RamDiscardListener
*rdl
,
366 MemoryRegionSection
*section
)
368 VFIORamDiscardListener
*vrdl
= container_of(rdl
, VFIORamDiscardListener
,
370 VFIOContainerBase
*bcontainer
= vrdl
->bcontainer
;
371 const hwaddr end
= section
->offset_within_region
+
372 int128_get64(section
->size
);
373 hwaddr start
, next
, iova
;
378 * Map in (aligned within memory region) minimum granularity, so we can
379 * unmap in minimum granularity later.
381 for (start
= section
->offset_within_region
; start
< end
; start
= next
) {
382 next
= ROUND_UP(start
+ 1, vrdl
->granularity
);
383 next
= MIN(next
, end
);
385 iova
= start
- section
->offset_within_region
+
386 section
->offset_within_address_space
;
387 vaddr
= memory_region_get_ram_ptr(section
->mr
) + start
;
389 ret
= vfio_container_dma_map(bcontainer
, iova
, next
- start
,
390 vaddr
, section
->readonly
);
393 vfio_ram_discard_notify_discard(rdl
, section
);
400 static void vfio_register_ram_discard_listener(VFIOContainerBase
*bcontainer
,
401 MemoryRegionSection
*section
)
403 RamDiscardManager
*rdm
= memory_region_get_ram_discard_manager(section
->mr
);
404 VFIORamDiscardListener
*vrdl
;
406 /* Ignore some corner cases not relevant in practice. */
407 g_assert(QEMU_IS_ALIGNED(section
->offset_within_region
, TARGET_PAGE_SIZE
));
408 g_assert(QEMU_IS_ALIGNED(section
->offset_within_address_space
,
410 g_assert(QEMU_IS_ALIGNED(int128_get64(section
->size
), TARGET_PAGE_SIZE
));
412 vrdl
= g_new0(VFIORamDiscardListener
, 1);
413 vrdl
->bcontainer
= bcontainer
;
414 vrdl
->mr
= section
->mr
;
415 vrdl
->offset_within_address_space
= section
->offset_within_address_space
;
416 vrdl
->size
= int128_get64(section
->size
);
417 vrdl
->granularity
= ram_discard_manager_get_min_granularity(rdm
,
420 g_assert(vrdl
->granularity
&& is_power_of_2(vrdl
->granularity
));
421 g_assert(bcontainer
->pgsizes
&&
422 vrdl
->granularity
>= 1ULL << ctz64(bcontainer
->pgsizes
));
424 ram_discard_listener_init(&vrdl
->listener
,
425 vfio_ram_discard_notify_populate
,
426 vfio_ram_discard_notify_discard
, true);
427 ram_discard_manager_register_listener(rdm
, &vrdl
->listener
, section
);
428 QLIST_INSERT_HEAD(&bcontainer
->vrdl_list
, vrdl
, next
);
431 * Sanity-check if we have a theoretically problematic setup where we could
432 * exceed the maximum number of possible DMA mappings over time. We assume
433 * that each mapped section in the same address space as a RamDiscardManager
434 * section consumes exactly one DMA mapping, with the exception of
435 * RamDiscardManager sections; i.e., we don't expect to have gIOMMU sections
436 * in the same address space as RamDiscardManager sections.
438 * We assume that each section in the address space consumes one memslot.
439 * We take the number of KVM memory slots as a best guess for the maximum
440 * number of sections in the address space we could have over time,
441 * also consuming DMA mappings.
443 if (bcontainer
->dma_max_mappings
) {
444 unsigned int vrdl_count
= 0, vrdl_mappings
= 0, max_memslots
= 512;
448 max_memslots
= kvm_get_max_memslots();
452 QLIST_FOREACH(vrdl
, &bcontainer
->vrdl_list
, next
) {
455 start
= QEMU_ALIGN_DOWN(vrdl
->offset_within_address_space
,
457 end
= ROUND_UP(vrdl
->offset_within_address_space
+ vrdl
->size
,
459 vrdl_mappings
+= (end
- start
) / vrdl
->granularity
;
463 if (vrdl_mappings
+ max_memslots
- vrdl_count
>
464 bcontainer
->dma_max_mappings
) {
465 warn_report("%s: possibly running out of DMA mappings. E.g., try"
466 " increasing the 'block-size' of virtio-mem devies."
467 " Maximum possible DMA mappings: %d, Maximum possible"
468 " memslots: %d", __func__
, bcontainer
->dma_max_mappings
,
474 static void vfio_unregister_ram_discard_listener(VFIOContainerBase
*bcontainer
,
475 MemoryRegionSection
*section
)
477 RamDiscardManager
*rdm
= memory_region_get_ram_discard_manager(section
->mr
);
478 VFIORamDiscardListener
*vrdl
= NULL
;
480 QLIST_FOREACH(vrdl
, &bcontainer
->vrdl_list
, next
) {
481 if (vrdl
->mr
== section
->mr
&&
482 vrdl
->offset_within_address_space
==
483 section
->offset_within_address_space
) {
489 hw_error("vfio: Trying to unregister missing RAM discard listener");
492 ram_discard_manager_unregister_listener(rdm
, &vrdl
->listener
);
493 QLIST_REMOVE(vrdl
, next
);
497 static bool vfio_known_safe_misalignment(MemoryRegionSection
*section
)
499 MemoryRegion
*mr
= section
->mr
;
501 if (!TPM_IS_CRB(mr
->owner
)) {
505 /* this is a known safe misaligned region, just trace for debug purpose */
506 trace_vfio_known_safe_misalignment(memory_region_name(mr
),
507 section
->offset_within_address_space
,
508 section
->offset_within_region
,
509 qemu_real_host_page_size());
513 static bool vfio_listener_valid_section(MemoryRegionSection
*section
,
516 if (vfio_listener_skipped_section(section
)) {
517 trace_vfio_listener_region_skip(name
,
518 section
->offset_within_address_space
,
519 section
->offset_within_address_space
+
520 int128_get64(int128_sub(section
->size
, int128_one())));
524 if (unlikely((section
->offset_within_address_space
&
525 ~qemu_real_host_page_mask()) !=
526 (section
->offset_within_region
& ~qemu_real_host_page_mask()))) {
527 if (!vfio_known_safe_misalignment(section
)) {
528 error_report("%s received unaligned region %s iova=0x%"PRIx64
529 " offset_within_region=0x%"PRIx64
530 " qemu_real_host_page_size=0x%"PRIxPTR
,
531 __func__
, memory_region_name(section
->mr
),
532 section
->offset_within_address_space
,
533 section
->offset_within_region
,
534 qemu_real_host_page_size());
542 static bool vfio_get_section_iova_range(VFIOContainerBase
*bcontainer
,
543 MemoryRegionSection
*section
,
544 hwaddr
*out_iova
, hwaddr
*out_end
,
550 iova
= REAL_HOST_PAGE_ALIGN(section
->offset_within_address_space
);
551 llend
= int128_make64(section
->offset_within_address_space
);
552 llend
= int128_add(llend
, section
->size
);
553 llend
= int128_and(llend
, int128_exts64(qemu_real_host_page_mask()));
555 if (int128_ge(int128_make64(iova
), llend
)) {
560 *out_end
= int128_get64(int128_sub(llend
, int128_one()));
567 static void vfio_listener_region_add(MemoryListener
*listener
,
568 MemoryRegionSection
*section
)
570 VFIOContainerBase
*bcontainer
= container_of(listener
, VFIOContainerBase
,
573 Int128 llend
, llsize
;
578 if (!vfio_listener_valid_section(section
, "region_add")) {
582 if (!vfio_get_section_iova_range(bcontainer
, section
, &iova
, &end
,
584 if (memory_region_is_ram_device(section
->mr
)) {
585 trace_vfio_listener_region_add_no_dma_map(
586 memory_region_name(section
->mr
),
587 section
->offset_within_address_space
,
588 int128_getlo(section
->size
),
589 qemu_real_host_page_size());
594 if (!vfio_container_add_section_window(bcontainer
, section
, &err
)) {
598 memory_region_ref(section
->mr
);
600 if (memory_region_is_iommu(section
->mr
)) {
601 VFIOGuestIOMMU
*giommu
;
602 IOMMUMemoryRegion
*iommu_mr
= IOMMU_MEMORY_REGION(section
->mr
);
605 trace_vfio_listener_region_add_iommu(section
->mr
->name
, iova
, end
);
607 * FIXME: For VFIO iommu types which have KVM acceleration to
608 * avoid bouncing all map/unmaps through qemu this way, this
609 * would be the right place to wire that up (tell the KVM
610 * device emulation the VFIO iommu handles to use).
612 giommu
= g_malloc0(sizeof(*giommu
));
613 giommu
->iommu_mr
= iommu_mr
;
614 giommu
->iommu_offset
= section
->offset_within_address_space
-
615 section
->offset_within_region
;
616 giommu
->bcontainer
= bcontainer
;
617 llend
= int128_add(int128_make64(section
->offset_within_region
),
619 llend
= int128_sub(llend
, int128_one());
620 iommu_idx
= memory_region_iommu_attrs_to_index(iommu_mr
,
621 MEMTXATTRS_UNSPECIFIED
);
622 iommu_notifier_init(&giommu
->n
, vfio_iommu_map_notify
,
623 IOMMU_NOTIFIER_IOTLB_EVENTS
,
624 section
->offset_within_region
,
628 ret
= memory_region_register_iommu_notifier(section
->mr
, &giommu
->n
,
634 QLIST_INSERT_HEAD(&bcontainer
->giommu_list
, giommu
, giommu_next
);
635 memory_region_iommu_replay(giommu
->iommu_mr
, &giommu
->n
);
640 /* Here we assume that memory_region_is_ram(section->mr)==true */
643 * For RAM memory regions with a RamDiscardManager, we only want to map the
644 * actually populated parts - and update the mapping whenever we're notified
647 if (memory_region_has_ram_discard_manager(section
->mr
)) {
648 vfio_register_ram_discard_listener(bcontainer
, section
);
652 vaddr
= memory_region_get_ram_ptr(section
->mr
) +
653 section
->offset_within_region
+
654 (iova
- section
->offset_within_address_space
);
656 trace_vfio_listener_region_add_ram(iova
, end
, vaddr
);
658 llsize
= int128_sub(llend
, int128_make64(iova
));
660 if (memory_region_is_ram_device(section
->mr
)) {
661 hwaddr pgmask
= (1ULL << ctz64(bcontainer
->pgsizes
)) - 1;
663 if ((iova
& pgmask
) || (int128_get64(llsize
) & pgmask
)) {
664 trace_vfio_listener_region_add_no_dma_map(
665 memory_region_name(section
->mr
),
666 section
->offset_within_address_space
,
667 int128_getlo(section
->size
),
673 ret
= vfio_container_dma_map(bcontainer
, iova
, int128_get64(llsize
),
674 vaddr
, section
->readonly
);
676 error_setg(&err
, "vfio_container_dma_map(%p, 0x%"HWADDR_PRIx
", "
677 "0x%"HWADDR_PRIx
", %p) = %d (%s)",
678 bcontainer
, iova
, int128_get64(llsize
), vaddr
, ret
,
680 if (memory_region_is_ram_device(section
->mr
)) {
681 /* Allow unexpected mappings not to be fatal for RAM devices */
682 error_report_err(err
);
691 if (memory_region_is_ram_device(section
->mr
)) {
692 error_reportf_err(err
, "PCI p2p may not work: ");
696 * On the initfn path, store the first error in the container so we
697 * can gracefully fail. Runtime, there's not much we can do other
698 * than throw a hardware error.
700 if (!bcontainer
->initialized
) {
701 if (!bcontainer
->error
) {
702 error_propagate_prepend(&bcontainer
->error
, err
,
704 memory_region_name(section
->mr
));
709 error_report_err(err
);
710 hw_error("vfio: DMA mapping failed, unable to continue");
714 static void vfio_listener_region_del(MemoryListener
*listener
,
715 MemoryRegionSection
*section
)
717 VFIOContainerBase
*bcontainer
= container_of(listener
, VFIOContainerBase
,
720 Int128 llend
, llsize
;
722 bool try_unmap
= true;
724 if (!vfio_listener_valid_section(section
, "region_del")) {
728 if (memory_region_is_iommu(section
->mr
)) {
729 VFIOGuestIOMMU
*giommu
;
731 trace_vfio_listener_region_del_iommu(section
->mr
->name
);
732 QLIST_FOREACH(giommu
, &bcontainer
->giommu_list
, giommu_next
) {
733 if (MEMORY_REGION(giommu
->iommu_mr
) == section
->mr
&&
734 giommu
->n
.start
== section
->offset_within_region
) {
735 memory_region_unregister_iommu_notifier(section
->mr
,
737 QLIST_REMOVE(giommu
, giommu_next
);
744 * FIXME: We assume the one big unmap below is adequate to
745 * remove any individual page mappings in the IOMMU which
746 * might have been copied into VFIO. This works for a page table
747 * based IOMMU where a big unmap flattens a large range of IO-PTEs.
748 * That may not be true for all IOMMU types.
752 if (!vfio_get_section_iova_range(bcontainer
, section
, &iova
, &end
,
757 llsize
= int128_sub(llend
, int128_make64(iova
));
759 trace_vfio_listener_region_del(iova
, end
);
761 if (memory_region_is_ram_device(section
->mr
)) {
764 pgmask
= (1ULL << ctz64(bcontainer
->pgsizes
)) - 1;
765 try_unmap
= !((iova
& pgmask
) || (int128_get64(llsize
) & pgmask
));
766 } else if (memory_region_has_ram_discard_manager(section
->mr
)) {
767 vfio_unregister_ram_discard_listener(bcontainer
, section
);
768 /* Unregistering will trigger an unmap. */
773 if (int128_eq(llsize
, int128_2_64())) {
774 /* The unmap ioctl doesn't accept a full 64-bit span. */
775 llsize
= int128_rshift(llsize
, 1);
776 ret
= vfio_container_dma_unmap(bcontainer
, iova
,
777 int128_get64(llsize
), NULL
);
779 error_report("vfio_container_dma_unmap(%p, 0x%"HWADDR_PRIx
", "
780 "0x%"HWADDR_PRIx
") = %d (%s)",
781 bcontainer
, iova
, int128_get64(llsize
), ret
,
784 iova
+= int128_get64(llsize
);
786 ret
= vfio_container_dma_unmap(bcontainer
, iova
,
787 int128_get64(llsize
), NULL
);
789 error_report("vfio_container_dma_unmap(%p, 0x%"HWADDR_PRIx
", "
790 "0x%"HWADDR_PRIx
") = %d (%s)",
791 bcontainer
, iova
, int128_get64(llsize
), ret
,
796 memory_region_unref(section
->mr
);
798 vfio_container_del_section_window(bcontainer
, section
);
801 typedef struct VFIODirtyRanges
{
810 typedef struct VFIODirtyRangesListener
{
811 VFIOContainerBase
*bcontainer
;
812 VFIODirtyRanges ranges
;
813 MemoryListener listener
;
814 } VFIODirtyRangesListener
;
816 static bool vfio_section_is_vfio_pci(MemoryRegionSection
*section
,
817 VFIOContainerBase
*bcontainer
)
819 VFIOPCIDevice
*pcidev
;
820 VFIODevice
*vbasedev
;
823 owner
= memory_region_owner(section
->mr
);
825 QLIST_FOREACH(vbasedev
, &bcontainer
->device_list
, container_next
) {
826 if (vbasedev
->type
!= VFIO_DEVICE_TYPE_PCI
) {
829 pcidev
= container_of(vbasedev
, VFIOPCIDevice
, vbasedev
);
830 if (OBJECT(pcidev
) == owner
) {
838 static void vfio_dirty_tracking_update_range(VFIODirtyRanges
*range
,
839 hwaddr iova
, hwaddr end
,
845 * The address space passed to the dirty tracker is reduced to three ranges:
846 * one for 32-bit DMA ranges, one for 64-bit DMA ranges and one for the
849 * The underlying reports of dirty will query a sub-interval of each of
852 * The purpose of the three range handling is to handle known cases of big
853 * holes in the address space, like the x86 AMD 1T hole, and firmware (like
854 * OVMF) which may relocate the pci-hole64 to the end of the address space.
855 * The latter would otherwise generate large ranges for tracking, stressing
856 * the limits of supported hardware. The pci-hole32 will always be below 4G
857 * (overlapping or not) so it doesn't need special handling and is part of
860 * The alternative would be an IOVATree but that has a much bigger runtime
861 * overhead and unnecessary complexity.
863 if (update_pci
&& iova
>= UINT32_MAX
) {
864 min
= &range
->minpci64
;
865 max
= &range
->maxpci64
;
867 min
= (end
<= UINT32_MAX
) ? &range
->min32
: &range
->min64
;
868 max
= (end
<= UINT32_MAX
) ? &range
->max32
: &range
->max64
;
877 trace_vfio_device_dirty_tracking_update(iova
, end
, *min
, *max
);
880 static void vfio_dirty_tracking_update(MemoryListener
*listener
,
881 MemoryRegionSection
*section
)
883 VFIODirtyRangesListener
*dirty
=
884 container_of(listener
, VFIODirtyRangesListener
, listener
);
887 if (!vfio_listener_valid_section(section
, "tracking_update") ||
888 !vfio_get_section_iova_range(dirty
->bcontainer
, section
,
889 &iova
, &end
, NULL
)) {
893 vfio_dirty_tracking_update_range(&dirty
->ranges
, iova
, end
,
894 vfio_section_is_vfio_pci(section
, dirty
->bcontainer
));
897 static const MemoryListener vfio_dirty_tracking_listener
= {
898 .name
= "vfio-tracking",
899 .region_add
= vfio_dirty_tracking_update
,
902 static void vfio_dirty_tracking_init(VFIOContainerBase
*bcontainer
,
903 VFIODirtyRanges
*ranges
)
905 VFIODirtyRangesListener dirty
;
907 memset(&dirty
, 0, sizeof(dirty
));
908 dirty
.ranges
.min32
= UINT32_MAX
;
909 dirty
.ranges
.min64
= UINT64_MAX
;
910 dirty
.ranges
.minpci64
= UINT64_MAX
;
911 dirty
.listener
= vfio_dirty_tracking_listener
;
912 dirty
.bcontainer
= bcontainer
;
914 memory_listener_register(&dirty
.listener
,
915 bcontainer
->space
->as
);
917 *ranges
= dirty
.ranges
;
920 * The memory listener is synchronous, and used to calculate the range
921 * to dirty tracking. Unregister it after we are done as we are not
922 * interested in any follow-up updates.
924 memory_listener_unregister(&dirty
.listener
);
927 static void vfio_devices_dma_logging_stop(VFIOContainerBase
*bcontainer
)
929 uint64_t buf
[DIV_ROUND_UP(sizeof(struct vfio_device_feature
),
930 sizeof(uint64_t))] = {};
931 struct vfio_device_feature
*feature
= (struct vfio_device_feature
*)buf
;
932 VFIODevice
*vbasedev
;
934 feature
->argsz
= sizeof(buf
);
935 feature
->flags
= VFIO_DEVICE_FEATURE_SET
|
936 VFIO_DEVICE_FEATURE_DMA_LOGGING_STOP
;
938 QLIST_FOREACH(vbasedev
, &bcontainer
->device_list
, container_next
) {
939 if (!vbasedev
->dirty_tracking
) {
943 if (ioctl(vbasedev
->fd
, VFIO_DEVICE_FEATURE
, feature
)) {
944 warn_report("%s: Failed to stop DMA logging, err %d (%s)",
945 vbasedev
->name
, -errno
, strerror(errno
));
947 vbasedev
->dirty_tracking
= false;
951 static struct vfio_device_feature
*
952 vfio_device_feature_dma_logging_start_create(VFIOContainerBase
*bcontainer
,
953 VFIODirtyRanges
*tracking
)
955 struct vfio_device_feature
*feature
;
957 struct vfio_device_feature_dma_logging_control
*control
;
958 struct vfio_device_feature_dma_logging_range
*ranges
;
960 feature_size
= sizeof(struct vfio_device_feature
) +
961 sizeof(struct vfio_device_feature_dma_logging_control
);
962 feature
= g_try_malloc0(feature_size
);
967 feature
->argsz
= feature_size
;
968 feature
->flags
= VFIO_DEVICE_FEATURE_SET
|
969 VFIO_DEVICE_FEATURE_DMA_LOGGING_START
;
971 control
= (struct vfio_device_feature_dma_logging_control
*)feature
->data
;
972 control
->page_size
= qemu_real_host_page_size();
975 * DMA logging uAPI guarantees to support at least a number of ranges that
976 * fits into a single host kernel base page.
978 control
->num_ranges
= !!tracking
->max32
+ !!tracking
->max64
+
979 !!tracking
->maxpci64
;
980 ranges
= g_try_new0(struct vfio_device_feature_dma_logging_range
,
981 control
->num_ranges
);
989 control
->ranges
= (uintptr_t)ranges
;
990 if (tracking
->max32
) {
991 ranges
->iova
= tracking
->min32
;
992 ranges
->length
= (tracking
->max32
- tracking
->min32
) + 1;
995 if (tracking
->max64
) {
996 ranges
->iova
= tracking
->min64
;
997 ranges
->length
= (tracking
->max64
- tracking
->min64
) + 1;
1000 if (tracking
->maxpci64
) {
1001 ranges
->iova
= tracking
->minpci64
;
1002 ranges
->length
= (tracking
->maxpci64
- tracking
->minpci64
) + 1;
1005 trace_vfio_device_dirty_tracking_start(control
->num_ranges
,
1006 tracking
->min32
, tracking
->max32
,
1007 tracking
->min64
, tracking
->max64
,
1008 tracking
->minpci64
, tracking
->maxpci64
);
1013 static void vfio_device_feature_dma_logging_start_destroy(
1014 struct vfio_device_feature
*feature
)
1016 struct vfio_device_feature_dma_logging_control
*control
=
1017 (struct vfio_device_feature_dma_logging_control
*)feature
->data
;
1018 struct vfio_device_feature_dma_logging_range
*ranges
=
1019 (struct vfio_device_feature_dma_logging_range
*)(uintptr_t)control
->ranges
;
1025 static bool vfio_devices_dma_logging_start(VFIOContainerBase
*bcontainer
,
1028 struct vfio_device_feature
*feature
;
1029 VFIODirtyRanges ranges
;
1030 VFIODevice
*vbasedev
;
1033 vfio_dirty_tracking_init(bcontainer
, &ranges
);
1034 feature
= vfio_device_feature_dma_logging_start_create(bcontainer
,
1037 error_setg_errno(errp
, errno
, "Failed to prepare DMA logging");
1041 QLIST_FOREACH(vbasedev
, &bcontainer
->device_list
, container_next
) {
1042 if (vbasedev
->dirty_tracking
) {
1046 ret
= ioctl(vbasedev
->fd
, VFIO_DEVICE_FEATURE
, feature
);
1049 error_setg_errno(errp
, errno
, "%s: Failed to start DMA logging",
1053 vbasedev
->dirty_tracking
= true;
1058 vfio_devices_dma_logging_stop(bcontainer
);
1061 vfio_device_feature_dma_logging_start_destroy(feature
);
1066 static bool vfio_listener_log_global_start(MemoryListener
*listener
,
1070 VFIOContainerBase
*bcontainer
= container_of(listener
, VFIOContainerBase
,
1074 if (vfio_devices_all_device_dirty_tracking(bcontainer
)) {
1075 ret
= vfio_devices_dma_logging_start(bcontainer
, errp
);
1077 ret
= vfio_container_set_dirty_page_tracking(bcontainer
, true, errp
) == 0;
1081 error_prepend(errp
, "vfio: Could not start dirty page tracking - ");
1086 static void vfio_listener_log_global_stop(MemoryListener
*listener
)
1088 VFIOContainerBase
*bcontainer
= container_of(listener
, VFIOContainerBase
,
1090 Error
*local_err
= NULL
;
1093 if (vfio_devices_all_device_dirty_tracking(bcontainer
)) {
1094 vfio_devices_dma_logging_stop(bcontainer
);
1096 ret
= vfio_container_set_dirty_page_tracking(bcontainer
, false,
1101 error_prepend(&local_err
,
1102 "vfio: Could not stop dirty page tracking - ");
1103 error_report_err(local_err
);
1104 vfio_set_migration_error(ret
);
1108 static int vfio_device_dma_logging_report(VFIODevice
*vbasedev
, hwaddr iova
,
1109 hwaddr size
, void *bitmap
)
1111 uint64_t buf
[DIV_ROUND_UP(sizeof(struct vfio_device_feature
) +
1112 sizeof(struct vfio_device_feature_dma_logging_report
),
1113 sizeof(uint64_t))] = {};
1114 struct vfio_device_feature
*feature
= (struct vfio_device_feature
*)buf
;
1115 struct vfio_device_feature_dma_logging_report
*report
=
1116 (struct vfio_device_feature_dma_logging_report
*)feature
->data
;
1118 report
->iova
= iova
;
1119 report
->length
= size
;
1120 report
->page_size
= qemu_real_host_page_size();
1121 report
->bitmap
= (uintptr_t)bitmap
;
1123 feature
->argsz
= sizeof(buf
);
1124 feature
->flags
= VFIO_DEVICE_FEATURE_GET
|
1125 VFIO_DEVICE_FEATURE_DMA_LOGGING_REPORT
;
1127 if (ioctl(vbasedev
->fd
, VFIO_DEVICE_FEATURE
, feature
)) {
1134 int vfio_devices_query_dirty_bitmap(const VFIOContainerBase
*bcontainer
,
1135 VFIOBitmap
*vbmap
, hwaddr iova
, hwaddr size
, Error
**errp
)
1137 VFIODevice
*vbasedev
;
1140 QLIST_FOREACH(vbasedev
, &bcontainer
->device_list
, container_next
) {
1141 ret
= vfio_device_dma_logging_report(vbasedev
, iova
, size
,
1144 error_setg_errno(errp
, -ret
,
1145 "%s: Failed to get DMA logging report, iova: "
1146 "0x%" HWADDR_PRIx
", size: 0x%" HWADDR_PRIx
,
1147 vbasedev
->name
, iova
, size
);
1156 int vfio_get_dirty_bitmap(const VFIOContainerBase
*bcontainer
, uint64_t iova
,
1157 uint64_t size
, ram_addr_t ram_addr
, Error
**errp
)
1159 bool all_device_dirty_tracking
=
1160 vfio_devices_all_device_dirty_tracking(bcontainer
);
1161 uint64_t dirty_pages
;
1165 if (!bcontainer
->dirty_pages_supported
&& !all_device_dirty_tracking
) {
1166 cpu_physical_memory_set_dirty_range(ram_addr
, size
,
1167 tcg_enabled() ? DIRTY_CLIENTS_ALL
:
1168 DIRTY_CLIENTS_NOCODE
);
1172 ret
= vfio_bitmap_alloc(&vbmap
, size
);
1174 error_setg_errno(errp
, -ret
,
1175 "Failed to allocate dirty tracking bitmap");
1179 if (all_device_dirty_tracking
) {
1180 ret
= vfio_devices_query_dirty_bitmap(bcontainer
, &vbmap
, iova
, size
,
1183 ret
= vfio_container_query_dirty_bitmap(bcontainer
, &vbmap
, iova
, size
,
1191 dirty_pages
= cpu_physical_memory_set_dirty_lebitmap(vbmap
.bitmap
, ram_addr
,
1194 trace_vfio_get_dirty_bitmap(iova
, size
, vbmap
.size
, ram_addr
, dirty_pages
);
1196 g_free(vbmap
.bitmap
);
1203 VFIOGuestIOMMU
*giommu
;
1204 } vfio_giommu_dirty_notifier
;
1206 static void vfio_iommu_map_dirty_notify(IOMMUNotifier
*n
, IOMMUTLBEntry
*iotlb
)
1208 vfio_giommu_dirty_notifier
*gdn
= container_of(n
,
1209 vfio_giommu_dirty_notifier
, n
);
1210 VFIOGuestIOMMU
*giommu
= gdn
->giommu
;
1211 VFIOContainerBase
*bcontainer
= giommu
->bcontainer
;
1212 hwaddr iova
= iotlb
->iova
+ giommu
->iommu_offset
;
1213 ram_addr_t translated_addr
;
1214 Error
*local_err
= NULL
;
1217 trace_vfio_iommu_map_dirty_notify(iova
, iova
+ iotlb
->addr_mask
);
1219 if (iotlb
->target_as
!= &address_space_memory
) {
1220 error_report("Wrong target AS \"%s\", only system memory is allowed",
1221 iotlb
->target_as
->name
? iotlb
->target_as
->name
: "none");
1226 if (!vfio_get_xlat_addr(iotlb
, NULL
, &translated_addr
, NULL
, &local_err
)) {
1227 error_report_err(local_err
);
1231 ret
= vfio_get_dirty_bitmap(bcontainer
, iova
, iotlb
->addr_mask
+ 1,
1232 translated_addr
, &local_err
);
1234 error_prepend(&local_err
,
1235 "vfio_iommu_map_dirty_notify(%p, 0x%"HWADDR_PRIx
", "
1236 "0x%"HWADDR_PRIx
") failed - ", bcontainer
, iova
,
1237 iotlb
->addr_mask
+ 1);
1238 error_report_err(local_err
);
1246 vfio_set_migration_error(ret
);
1250 static int vfio_ram_discard_get_dirty_bitmap(MemoryRegionSection
*section
,
1253 const hwaddr size
= int128_get64(section
->size
);
1254 const hwaddr iova
= section
->offset_within_address_space
;
1255 const ram_addr_t ram_addr
= memory_region_get_ram_addr(section
->mr
) +
1256 section
->offset_within_region
;
1257 VFIORamDiscardListener
*vrdl
= opaque
;
1258 Error
*local_err
= NULL
;
1262 * Sync the whole mapped region (spanning multiple individual mappings)
1265 ret
= vfio_get_dirty_bitmap(vrdl
->bcontainer
, iova
, size
, ram_addr
,
1268 error_report_err(local_err
);
1274 vfio_sync_ram_discard_listener_dirty_bitmap(VFIOContainerBase
*bcontainer
,
1275 MemoryRegionSection
*section
)
1277 RamDiscardManager
*rdm
= memory_region_get_ram_discard_manager(section
->mr
);
1278 VFIORamDiscardListener
*vrdl
= NULL
;
1280 QLIST_FOREACH(vrdl
, &bcontainer
->vrdl_list
, next
) {
1281 if (vrdl
->mr
== section
->mr
&&
1282 vrdl
->offset_within_address_space
==
1283 section
->offset_within_address_space
) {
1289 hw_error("vfio: Trying to sync missing RAM discard listener");
1293 * We only want/can synchronize the bitmap for actually mapped parts -
1294 * which correspond to populated parts. Replay all populated parts.
1296 return ram_discard_manager_replay_populated(rdm
, section
,
1297 vfio_ram_discard_get_dirty_bitmap
,
1301 static int vfio_sync_iommu_dirty_bitmap(VFIOContainerBase
*bcontainer
,
1302 MemoryRegionSection
*section
)
1304 VFIOGuestIOMMU
*giommu
;
1307 vfio_giommu_dirty_notifier gdn
;
1310 QLIST_FOREACH(giommu
, &bcontainer
->giommu_list
, giommu_next
) {
1311 if (MEMORY_REGION(giommu
->iommu_mr
) == section
->mr
&&
1312 giommu
->n
.start
== section
->offset_within_region
) {
1322 gdn
.giommu
= giommu
;
1323 idx
= memory_region_iommu_attrs_to_index(giommu
->iommu_mr
,
1324 MEMTXATTRS_UNSPECIFIED
);
1326 llend
= int128_add(int128_make64(section
->offset_within_region
),
1328 llend
= int128_sub(llend
, int128_one());
1330 iommu_notifier_init(&gdn
.n
, vfio_iommu_map_dirty_notify
, IOMMU_NOTIFIER_MAP
,
1331 section
->offset_within_region
, int128_get64(llend
),
1333 memory_region_iommu_replay(giommu
->iommu_mr
, &gdn
.n
);
1338 static int vfio_sync_dirty_bitmap(VFIOContainerBase
*bcontainer
,
1339 MemoryRegionSection
*section
, Error
**errp
)
1341 ram_addr_t ram_addr
;
1343 if (memory_region_is_iommu(section
->mr
)) {
1344 return vfio_sync_iommu_dirty_bitmap(bcontainer
, section
);
1345 } else if (memory_region_has_ram_discard_manager(section
->mr
)) {
1348 ret
= vfio_sync_ram_discard_listener_dirty_bitmap(bcontainer
, section
);
1351 "Failed to sync dirty bitmap with RAM discard listener");
1356 ram_addr
= memory_region_get_ram_addr(section
->mr
) +
1357 section
->offset_within_region
;
1359 return vfio_get_dirty_bitmap(bcontainer
,
1360 REAL_HOST_PAGE_ALIGN(section
->offset_within_address_space
),
1361 int128_get64(section
->size
), ram_addr
, errp
);
1364 static void vfio_listener_log_sync(MemoryListener
*listener
,
1365 MemoryRegionSection
*section
)
1367 VFIOContainerBase
*bcontainer
= container_of(listener
, VFIOContainerBase
,
1370 Error
*local_err
= NULL
;
1372 if (vfio_listener_skipped_section(section
)) {
1376 if (vfio_devices_all_dirty_tracking(bcontainer
)) {
1377 ret
= vfio_sync_dirty_bitmap(bcontainer
, section
, &local_err
);
1379 error_report_err(local_err
);
1380 vfio_set_migration_error(ret
);
1385 const MemoryListener vfio_memory_listener
= {
1387 .region_add
= vfio_listener_region_add
,
1388 .region_del
= vfio_listener_region_del
,
1389 .log_global_start
= vfio_listener_log_global_start
,
1390 .log_global_stop
= vfio_listener_log_global_stop
,
1391 .log_sync
= vfio_listener_log_sync
,
1394 void vfio_reset_handler(void *opaque
)
1396 VFIODevice
*vbasedev
;
1398 QLIST_FOREACH(vbasedev
, &vfio_device_list
, global_next
) {
1399 if (vbasedev
->dev
->realized
) {
1400 vbasedev
->ops
->vfio_compute_needs_reset(vbasedev
);
1404 QLIST_FOREACH(vbasedev
, &vfio_device_list
, global_next
) {
1405 if (vbasedev
->dev
->realized
&& vbasedev
->needs_reset
) {
1406 vbasedev
->ops
->vfio_hot_reset_multi(vbasedev
);
1411 int vfio_kvm_device_add_fd(int fd
, Error
**errp
)
1414 struct kvm_device_attr attr
= {
1415 .group
= KVM_DEV_VFIO_FILE
,
1416 .attr
= KVM_DEV_VFIO_FILE_ADD
,
1417 .addr
= (uint64_t)(unsigned long)&fd
,
1420 if (!kvm_enabled()) {
1424 if (vfio_kvm_device_fd
< 0) {
1425 struct kvm_create_device cd
= {
1426 .type
= KVM_DEV_TYPE_VFIO
,
1429 if (kvm_vm_ioctl(kvm_state
, KVM_CREATE_DEVICE
, &cd
)) {
1430 error_setg_errno(errp
, errno
, "Failed to create KVM VFIO device");
1434 vfio_kvm_device_fd
= cd
.fd
;
1437 if (ioctl(vfio_kvm_device_fd
, KVM_SET_DEVICE_ATTR
, &attr
)) {
1438 error_setg_errno(errp
, errno
, "Failed to add fd %d to KVM VFIO device",
1446 int vfio_kvm_device_del_fd(int fd
, Error
**errp
)
1449 struct kvm_device_attr attr
= {
1450 .group
= KVM_DEV_VFIO_FILE
,
1451 .attr
= KVM_DEV_VFIO_FILE_DEL
,
1452 .addr
= (uint64_t)(unsigned long)&fd
,
1455 if (vfio_kvm_device_fd
< 0) {
1456 error_setg(errp
, "KVM VFIO device isn't created yet");
1460 if (ioctl(vfio_kvm_device_fd
, KVM_SET_DEVICE_ATTR
, &attr
)) {
1461 error_setg_errno(errp
, errno
,
1462 "Failed to remove fd %d from KVM VFIO device", fd
);
1469 VFIOAddressSpace
*vfio_get_address_space(AddressSpace
*as
)
1471 VFIOAddressSpace
*space
;
1473 QLIST_FOREACH(space
, &vfio_address_spaces
, list
) {
1474 if (space
->as
== as
) {
1479 /* No suitable VFIOAddressSpace, create a new one */
1480 space
= g_malloc0(sizeof(*space
));
1482 QLIST_INIT(&space
->containers
);
1484 if (QLIST_EMPTY(&vfio_address_spaces
)) {
1485 qemu_register_reset(vfio_reset_handler
, NULL
);
1488 QLIST_INSERT_HEAD(&vfio_address_spaces
, space
, list
);
1493 void vfio_put_address_space(VFIOAddressSpace
*space
)
1495 if (!QLIST_EMPTY(&space
->containers
)) {
1499 QLIST_REMOVE(space
, list
);
1502 if (QLIST_EMPTY(&vfio_address_spaces
)) {
1503 qemu_unregister_reset(vfio_reset_handler
, NULL
);
1507 void vfio_address_space_insert(VFIOAddressSpace
*space
,
1508 VFIOContainerBase
*bcontainer
)
1510 QLIST_INSERT_HEAD(&space
->containers
, bcontainer
, next
);
1511 bcontainer
->space
= space
;
1514 struct vfio_device_info
*vfio_get_device_info(int fd
)
1516 struct vfio_device_info
*info
;
1517 uint32_t argsz
= sizeof(*info
);
1519 info
= g_malloc0(argsz
);
1522 info
->argsz
= argsz
;
1524 if (ioctl(fd
, VFIO_DEVICE_GET_INFO
, info
)) {
1529 if (info
->argsz
> argsz
) {
1530 argsz
= info
->argsz
;
1531 info
= g_realloc(info
, argsz
);
1538 bool vfio_attach_device(char *name
, VFIODevice
*vbasedev
,
1539 AddressSpace
*as
, Error
**errp
)
1541 const VFIOIOMMUClass
*ops
=
1542 VFIO_IOMMU_CLASS(object_class_by_name(TYPE_VFIO_IOMMU_LEGACY
));
1543 HostIOMMUDevice
*hiod
= NULL
;
1545 if (vbasedev
->iommufd
) {
1546 ops
= VFIO_IOMMU_CLASS(object_class_by_name(TYPE_VFIO_IOMMU_IOMMUFD
));
1552 if (!vbasedev
->mdev
) {
1553 hiod
= HOST_IOMMU_DEVICE(object_new(ops
->hiod_typename
));
1554 vbasedev
->hiod
= hiod
;
1557 if (!ops
->attach_device(name
, vbasedev
, as
, errp
)) {
1559 vbasedev
->hiod
= NULL
;
1566 void vfio_detach_device(VFIODevice
*vbasedev
)
1568 if (!vbasedev
->bcontainer
) {
1571 object_unref(vbasedev
->hiod
);
1572 VFIO_IOMMU_GET_CLASS(vbasedev
->bcontainer
)->detach_device(vbasedev
);