On Thu, Mar 23, 2023 at 05:22:36PM +0800, Nanyong Sun wrote: > > A patch to export that function is alread posted: > > > > https://lore.kernel.org/linux-iommu/BN9PR11MB52760E9705F2985EACCD5C4A8CBA9@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/T/#u > > > > But I do not want VDPA to mis-use it unless it also implements all the > > ownership stuff properly. > > > I want to confirm if we need to introduce iommu group logic to vdpa, as "all > the ownership stuff" ? You have to call iommu_device_claim_dma_owner() But again, this is all pointless, iommufd takes are of all of this and VDPA should switch to it instead of more hacking. Jason
