Re: [PATCH 0/9] Initial DMABUF support for iommufd

[Jason Gunthorpe <jgg@nvidia.com>]

On Tue, Nov 18, 2025 at 05:37:59AM +0000, Kasireddy, Vivek wrote:
> Hi Jason,
> 
> > Subject: Re: [PATCH 0/9] Initial DMABUF support for iommufd
> > 
> > On Thu, Nov 13, 2025 at 11:37:12AM -0700, Alex Williamson wrote:
> > > > The latest series for interconnect negotation to exchange a phys_addr is:
> > > >  https://lore.kernel.org/r/20251027044712.1676175-1-
> > vivek.kasireddy@intel.com
> > >
> > > If this is in development, why are we pursuing a vfio specific
> > > temporary "private interconnect" here rather than building on that
> > > work?  What are the gaps/barriers/timeline?
> >
> > I broadly don't expect to see an agreement on the above for probably
> Are you planning to post your SGT mapping type patches soon, so that we
> can start discussion on the design?

It is on my list, but probably not soon enough :\

I wanted to address the remarks given and I still have to conclude
some urgent things for this merge window.

> I went ahead and tested your patches and did not notice any regressions
> with my test-cases (after adding some minor fixups). I have also added/tested
> support for IOV mapping type based on your design:
> https://gitlab.freedesktop.org/Vivek/drm-tip/-/commits/dmabuf_iov_v1

Wow, that's great!

Jason