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

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Date:   Thu, 11 Mar 2021 12:37:06 +0100
From:   Christoph Hellwig <hch@....de>
To:     Jason Gunthorpe <jgg@...dia.com>
Cc:     Christoph Hellwig <hch@....de>,
        Max Gurtovoy <mgurtovoy@...dia.com>,
        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, aik@...abs.ru
Subject: Re: [PATCH 9/9] vfio/pci: export igd support into vendor vfio_pci
 driver

On Wed, Mar 10, 2021 at 08:31:27AM -0400, Jason Gunthorpe wrote:
> Yes, that needs more refactoring. I'm viewing this series as a
> "statement of intent" and once we commit to doing this we can go
> through the bigger effort to split up vfio_pci_core and tidy its API.
> 
> Obviously this is a big project, given the past comments I don't want
> to send more effort here until we see a community consensus emerge
> that this is what we want to do. If we build a sub-driver instead the
> work is all in the trash bin.

So my viewpoint here is that this work doesn't seem very useful for
the existing subdrivers given how much compat pain there is.  It
defintively is the right way to go for a new driver.