linux-kernel - Re: [PATCH v3 0/3] Improve vfio-pci primary GPU assignment behavior

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Message-ID: <3abf6d20-e6a1-a3f2-5852-25ab118ab569@suse.de>
Date:   Mon, 4 Jul 2022 09:10:12 +0200
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     alex.williamson@...hat.com, corbet@....net,
        maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
        airlied@...ux.ie, daniel@...ll.ch, deller@....de,
        gregkh@...uxfoundation.org, javierm@...hat.com, lersek@...hat.com,
        kraxel@...hat.com
Cc:     linux-fbdev@...r.kernel.org, kvm@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v3 0/3] Improve vfio-pci primary GPU assignment behavior

Hi,

this patchset has meanwhile reached drm-next and should go into Linux v5.20.

 
https://cgit.freedesktop.org/drm/drm/commit/?id=d173780620792c725506b0f3c5ec52c7fbac1db0

Best regards
Thomas

Am 22.06.22 um 16:01 schrieb Thomas Zimmermann:
> (I'm taking over this patchset from Alex, [1] as we agreed that it should
> go through the drm-misc tree.)
> 
> When assigning a primary graphics device to VM through vfio-pci device
> assignment, users often prevent binding of the native PCI graphics
> driver to avoid device initialization conflicts, however firmware
> console drivers may still be attached to the device which can often be
> cumbersome to manually unbind or exclude via cmdline options.
> 
> This series proposes to move the DRM aperture helpers out to
> drivers/video/ to make it more accessible to drivers like vfio-pci,
> which have neither dependencies on DRM code nor a struct drm_driver
> to present to existing interfaces.  vfio-pci can then trivially call
> into the aperture helpers to remove conflicting drivers, rather than
> open coding it ourselves as was proposed with a new symbol export in
> v1 of this series. [2]
> 
> v3:
> 	* add aperture_ prefix to all interfaces (Javier)
> 	* improved documentation (Javier)
> 	* update MAINTAINERS [3] and add aperture helpers
> 
> [1] https://lore.kernel.org/all/165541020563.1955826.16350888595945658159.stgit@omen/
> [2] https://lore.kernel.org/all/165453797543.3592816.6381793341352595461.stgit@omen/
> [3] https://lore.kernel.org/all/20220518183006.14548-2-tzimmermann@suse.de/
> 
> Alex Williamson (1):
>    vfio/pci: Remove console drivers
> 
> Thomas Zimmermann (2):
>    MAINTAINERS: Broaden scope of simpledrm entry
>    drm: Implement DRM aperture helpers under video/
> 
>   Documentation/driver-api/aperture.rst |  13 +
>   Documentation/driver-api/index.rst    |   1 +
>   MAINTAINERS                           |   6 +-
>   drivers/gpu/drm/drm_aperture.c        | 178 +------------
>   drivers/gpu/drm/tiny/Kconfig          |   1 +
>   drivers/vfio/pci/vfio_pci_core.c      |   5 +
>   drivers/video/Kconfig                 |   6 +
>   drivers/video/Makefile                |   2 +
>   drivers/video/aperture.c              | 351 ++++++++++++++++++++++++++
>   drivers/video/console/Kconfig         |   1 +
>   drivers/video/fbdev/Kconfig           |   7 +-
>   include/linux/aperture.h              |  56 ++++
>   12 files changed, 456 insertions(+), 171 deletions(-)
>   create mode 100644 Documentation/driver-api/aperture.rst
>   create mode 100644 drivers/video/aperture.c
>   create mode 100644 include/linux/aperture.h
> 
> 
> base-commit: 7025c1f111b7a057243de45bd56c14b906242a53

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev

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