On Fri, Sep 23, 2022 at 10:21:51AM +0800, Baolu Lu wrote: > At the beginning of this project, I wanted to consolidate the mm > notifications into the core. However, ARM SMMUv3 and Intel handle the mm > notifications a little differently. Then I decided to do this work > separately from the current series. It doesn't look really different.. The SVA iommu domain needs two new ops triggered by the notifier: - 'stop using the mm, subsitute a blocking domain' tied to release - Cache invalidate a range, maybe this is just iotlb_sync_map() And we could even think about the first as the core code literally attaching a dummy blocking domain and releasing the SVA domain. There is no reason we need to have every driver do this tricky bit of lifecycle management. Jason
