According to linux/include/uapi/linux/vfio.h, for a device to support migration it must provide a VFIO capability of type VFIO_REGION_INFO_CAP_TYPE and set .type/.subtype to VFIO_REGION_TYPE_MIGRATION/VFIO_REGION_TYPE_MIGRATION.
What confuses me is the following: "The structure vfio_device_migration_info is placed at the 0th offset of the VFIO_REGION_SUBTYPE_MIGRATION region to get and set VFIO device related migration information." Where do regions VFIO_REGION_TYPE_MIGRATION and VFIO_REGION_SUBTYPE_MIGRATION live on the device's address space? Is just like any other region, except that in the case of a PCI device it's index must be equal to, or larger than, VFIO_PCI_NUM_REGIONS, and set arbitrarily by the device implementation? If so, then I suppose this index must appear in struct vfio_device_info.num_regions? _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
