On Thu, Oct 14, 2021 at 03:00:38AM +0000, Tian, Kevin wrote: > I saw a concept of deferred attach in iommu core. See iommu_is_ > attach_deferred(). Currently this is vendor specific and I haven't > looked into the exact reason why some vendor sets it now. Just > be curious whether the same reason might be applied to virtio-iommu. The reason for attach_deferred is kdump support, where the IOMMU driver needs to keep the mappings from the old kernel until the device driver of the new kernel takes over. Regards, Joerg _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
