linux-kernel - Re: [PATCH 8/9] vfio/pci: export nvlink2 support into vendor vfio

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Message-ID: <20210311165128.GL2356281@nvidia.com>
Date:   Thu, 11 Mar 2021 12:51:28 -0400
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Max Gurtovoy <mgurtovoy@...dia.com>
Cc:     Alexey Kardashevskiy <aik@...abs.ru>, alex.williamson@...hat.com,
        cohuck@...hat.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, liranl@...dia.com, oren@...dia.com,
        tzahio@...dia.com, leonro@...dia.com, yarong@...dia.com,
        aviadye@...dia.com, shahafs@...dia.com, artemp@...dia.com,
        kwankhede@...dia.com, ACurrid@...dia.com, cjia@...dia.com,
        yishaih@...dia.com, mjrosato@...ux.ibm.com, hch@....de
Subject: Re: [PATCH 8/9] vfio/pci: export nvlink2 support into vendor
 vfio_pci drivers

On Thu, Mar 11, 2021 at 11:44:38AM +0200, Max Gurtovoy wrote:
> 
> On 3/11/2021 9:54 AM, Alexey Kardashevskiy wrote:
> > 
> > 
> > On 11/03/2021 13:00, Jason Gunthorpe wrote:
> > > On Thu, Mar 11, 2021 at 12:42:56PM +1100, Alexey Kardashevskiy wrote:
> > > > > > btw can the id list have only vendor ids and not have device ids?
> > > > > 
> > > > > The PCI matcher is quite flexable, see the other patch from Max for
> > > > > the igd
> > > >   ah cool, do this for NVIDIA GPUs then please, I just
> > > > discovered another P9
> > > > system sold with NVIDIA T4s which is not in your list.
> > > 
> > > I think it will make things easier down the road if you maintain an
> > > exact list <shrug>
> > 
> > 
> > Then why do not you do the exact list for Intel IGD? The commit log does
> > not explain this detail.
> 
> I expect Intel team to review this series and give a more precise list.
> 
> I did the best I could in finding a proper configuration for igd.

Right. Doing this retroactively is really hard.

Jason