On 06/16/22 22:38, Alex Williamson wrote: > 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[1]. > > Thanks to Thomas for splitting out the aperture code with new > documentation. > > Thomas had proposed this going through the vfio tree with appropriate > stakeholder acks, that's fine with me, but I'm also open to it going > through the DRM tree given that the vfio-pci-core change is even more > trivial now and the bulk of the changes are DRM/video paths. Thanks, > > Alex > > [1]https://lore.kernel.org/all/165453797543.3592816.6381793341352595461.stgit@omen/ > > --- > > Alex Williamson (1): > vfio/pci: Remove console drivers > > Thomas Zimmermann (1): > drm: Implement DRM aperture helpers under video/ > > > Documentation/driver-api/aperture.rst | 13 + > Documentation/driver-api/index.rst | 1 + > drivers/gpu/drm/drm_aperture.c | 174 +------------ > 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 | 340 ++++++++++++++++++++++++++ > drivers/video/console/Kconfig | 1 + > drivers/video/fbdev/Kconfig | 7 +- > include/linux/aperture.h | 56 +++++ > 11 files changed, 440 insertions(+), 166 deletions(-) > create mode 100644 Documentation/driver-api/aperture.rst > create mode 100644 drivers/video/aperture.c > create mode 100644 include/linux/aperture.h > series Tested-by: Laszlo Ersek <lersek@xxxxxxxxxx> (on top of Fedora's 5.18.5-100.fc35.x86_64) Thanks, Laszlo
