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

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Message-ID: <b65bf833-7167-e43f-717a-923dfa8bbc15@ozlabs.ru>
Date:   Wed, 24 Mar 2021 13:39:04 +1100
From:   Alexey Kardashevskiy <aik@...abs.ru>
To:     Jason Gunthorpe <jgg@...dia.com>,
        Alex Williamson <alex.williamson@...hat.com>
Cc:     Christoph Hellwig <hch@....de>,
        Max Gurtovoy <mgurtovoy@...dia.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
Subject: Re: [PATCH 8/9] vfio/pci: export nvlink2 support into vendor vfio_pci
 drivers



On 24/03/2021 06:32, Jason Gunthorpe wrote:

>>> For NVIDIA GPU Max checked internally and we saw it looks very much
>>> like how Intel GPU works. Only some PCI IDs trigger checking on the
>>> feature the firmware thing is linked to.
>>
>> And as Alexey noted, the table came up incomplete.  But also those same
>> devices exist on platforms where this extension is completely
>> irrelevant.
> 
> I understood he ment that NVIDI GPUs *without* NVLINK can exist, but
> the ID table we have here is supposed to be the NVLINK compatible
> ID's.


I also meant there are more (than in the proposed list)  GPUs with 
NVLink which will work on P9.


-- 
Alexey