On Wed, 26 Feb 2020 at 12:38, Sai Pavan Boddu <saip...@xilinx.com> wrote: > > Hi Poalo/Peter, > > We are trying to add SMMU support for dma's used in SD controller on ZynqMP > boards. In order to do that we need a clean way to assign MemTxAttrs to each > device(i.e all devices which connect to smmu) via "object_add_link_property/ > object_set_link_property " functions. > > But in order to do that, first we may need to convert MemTxAttrs as QOM > object. I just need some feedback, if its advisable to do so ?
We create and throw around MemTxAttrs structs a lot, I don't think they're suitable to be QOM objects. I don't think you need it, anyway -- your problem is rather that the iommu doesn't get an opportunity to sit in the middle of transactions the way you'd like it to, and making MemTxAttrs a QOM object doesn't help address that. thanks -- PMM
