linux-kernel - Re: [PATCH v2 26/26] vfio/xe: Add vendor-specific vfio

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Message-ID: <ilv4dmjtei7llmoamwdjb3eb32rowzg6lwpjhdtilouoi6hyop@xnpkhbezzbcv>
Date: Wed, 22 Oct 2025 10:52:34 +0200
From: Michał Winiarski <michal.winiarski@...el.com>
To: Christoph Hellwig <hch@...radead.org>
CC: Alex Williamson <alex.williamson@...hat.com>, Lucas De Marchi
	<lucas.demarchi@...el.com>, Thomas Hellström
	<thomas.hellstrom@...ux.intel.com>, Rodrigo Vivi <rodrigo.vivi@...el.com>,
	Jason Gunthorpe <jgg@...pe.ca>, Yishai Hadas <yishaih@...dia.com>, Kevin Tian
	<kevin.tian@...el.com>, <intel-xe@...ts.freedesktop.org>,
	<linux-kernel@...r.kernel.org>, <kvm@...r.kernel.org>, Matthew Brost
	<matthew.brost@...el.com>, Michal Wajdeczko <michal.wajdeczko@...el.com>,
	<dri-devel@...ts.freedesktop.org>, Jani Nikula <jani.nikula@...ux.intel.com>,
	Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>, Tvrtko Ursulin
	<tursulin@...ulin.net>, David Airlie <airlied@...il.com>, Simona Vetter
	<simona@...ll.ch>, Lukasz Laguna <lukasz.laguna@...el.com>
Subject: Re: [PATCH v2 26/26] vfio/xe: Add vendor-specific vfio_pci driver
 for Intel graphics

On Wed, Oct 22, 2025 at 12:12:01AM -0700, Christoph Hellwig wrote:
> There is absolutely nothing vendor-specific here, it is a device variant
> driver.  In fact in Linux basically nothing is ever vendor specific,
> because vendor is not a concept that does matter in any practical sense
> except for tiny details like the vendor ID as one of the IDs to match
> on in device probing.
> 
> I have no idea why people keep trying to inject this term again and
> again.

Hi,

The reasoning was that in this case we're matching vendor ID + class
combination to match all Intel GPUs, and not just selected device ID,
but I get your point.

Let me replace it "device specific" to follow the VFIO documentation.

Thanks,
-Michał