Jean-Philippe Brucker
2021-Sep-30 08:49 UTC
[PATCH RFC v1 01/11] uapi/virtio-iommu: Add page request grp-id and flags information
On Thu, Sep 30, 2021 at 10:26:35AM +0530, Vivek Kumar Gautam wrote:> > I'm not sure why we made it 32-bit in Linux UAPI, it's a little wasteful. > > PCIe PRGI is 9-bits and SMMU STAG is 16-bits. Since the scope of the grpid > > is the endpoint, 16-bit means 64k in-flight faults per endpoint, which > > seems more than enough. > > Right, I will update this to 16-bits field. It won't be okay to update the > iommu uAPI now, right?Since there is no UAPI transport for the fault request/response at the moment, it should be possible to update it. Thanks, Jean