• Alex Williamson's avatar
    vfio-pci: Add VGA arbiter client · ecaa1f6a
    Alex Williamson authored
    If VFIO VGA access is disabled for the user, either by CONFIG option
    or module parameter, we can often opt-out of VGA arbitration.  We can
    do this when PCI bridge control of VGA routing is possible.  This
    means that we must have a parent bridge and there must only be a
    single VGA device below that bridge.  Fortunately this is the typical
    case for discrete GPUs.
    Doing this allows us to minimize the impact of additional GPUs, in
    terms of VGA arbitration, when they are only used via vfio-pci for
    non-VGA applications.
    Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
vfio_pci.c 27.6 KB