linux-kernel - Re: [PATCH 0/2] vfio: Deprecate fsl-mc, platform, and amba

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Message-ID: <20250811202357.GH377696@ziepe.ca>
Date: Mon, 11 Aug 2025 17:23:57 -0300
From: Jason Gunthorpe <jgg@...pe.ca>
To: Alex Williamson <alex.williamson@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	eric.auger@...hat.com, clg@...hat.com
Subject: Re: [PATCH 0/2] vfio: Deprecate fsl-mc, platform, and amba

On Wed, Aug 06, 2025 at 11:03:10AM -0600, Alex Williamson wrote:
> The vfio-fsl-mc driver has been orphaned since April 2024 after the
> maintainer became unresponsive.  More than a year later, the driver
> has only received community maintenance.  Let's take the next step
> towards removal by marking it obsolete/deprecated.
> 
> The vfio-platform and vfio-amba drivers have an active maintainer,
> but even the maintainer has no ability to test these drivers anymore.
> The hardware itself has become obsolete and despite Eric's efforts to
> add support for new devices and presenting on the complexities of
> trying to manage and support shared resources at KVM Forum 2024, the
> state of the driver and ability to test it upstream has not advanced.
> The experiment has been useful, but seems to be reaching a conclusion.
> QEMU intends to remove vfio-platform support in the 10.2 release.
> Mark these drivers as obsolete/deprecated in the kernel as well.

It seems fine, but I'd just remove them entirely right now. It is easy
enough to revert a removal down the road if someone comes with a
compelling reason.

Reviewed-by: Jason Gunthorpe <jgg@...dia.com>

Jason