Re: [PATCH RFC v1 01/11] uapi/virtio-iommu: Add page request grp-id and flags information

[Vivek Kumar Gautam]

On 9/30/21 2:19 PM, Jean-Philippe Brucker wrote:
> 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.

Righty! I will add a patch for that too then.



Thanks & regards

Vivek