linux-kernel - Re: [PATCH v7 1/1] vfio/nvgpu: Add vfio pci variant module for grace hopper

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Message-ID: <ZPCG9/P0fm88E2Zi@infradead.org>
Date:   Thu, 31 Aug 2023 05:26:31 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Jason Gunthorpe <jgg@...dia.com>
Cc:     Christoph Hellwig <hch@...radead.org>, ankita@...dia.com,
        alex.williamson@...hat.com, yishaih@...dia.com,
        shameerali.kolothum.thodi@...wei.com, kevin.tian@...el.com,
        aniketa@...dia.com, cjia@...dia.com, kwankhede@...dia.com,
        targupta@...dia.com, vsethi@...dia.com, acurrid@...dia.com,
        apopple@...dia.com, jhubbard@...dia.com, danw@...dia.com,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        David Airlie <airlied@...hat.com>,
        dri-devel@...ts.freedesktop.org, Daniel Vetter <daniel@...ll.ch>
Subject: Re: [PATCH v7 1/1] vfio/nvgpu: Add vfio pci variant module for grace
 hopper

On Wed, Aug 30, 2023 at 12:39:05PM -0300, Jason Gunthorpe wrote:
> On Wed, Aug 30, 2023 at 06:50:32AM -0700, Christoph Hellwig wrote:
> > I know I'm chiming in a bit late, but what ultimate user space is going
> > to use this?  We should not add anything to the kernel that can't
> > be used without fully open user space.
> 
> qemu will get the matching VFIO userspace patches, I think they were
> posted someplace already.

Well, that's not what I mean with full userspace.  Whats the actual
consumer running in a qemu VM here?