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vfio: Get migration capability flags for container

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Added helper functions to get IOMMU info capability chain.
Added function to get migration capability information from that
capability chain for IOMMU container.

Similar change was proposed earlier:
https://lists.gnu.org/archive/html/qemu-devel/2018-05/msg03759.html

Disable migration for devices if IOMMU module doesn't support migration
capability.

Signed-off-by: Kirti Wankhede <kwankhede@nvidia.com>
Cc: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Cc: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Kirti Wankhede 2020-10-26 15:06:21 +05:30 • committed by Alex Williamson
parent 74ee653799
commit 87ea529c50
3 changed files with 91 additions and 9 deletions
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7
hw/vfio/migration.c
View file

@ -832,9 +832,14 @@ err:
int vfio_migration_probe(VFIODevice *vbasedev, Error **errp)
{
VFIOContainer *container = vbasedev->group->container;
struct vfio_region_info *info = NULL;
Error *local_err = NULL;
int ret;
int ret = -ENOTSUP;
if (!container->dirty_pages_supported) {
goto add_blocker;
}
ret = vfio_get_dev_region_info(vbasedev, VFIO_REGION_TYPE_MIGRATION,
VFIO_REGION_SUBTYPE_MIGRATION, &info);