On Thu, Mar 02, 2023 at 03:35:06PM -0800, Rob Clark wrote: > From: Rob Clark <robdclark@xxxxxxxxxxxx> > > Add a build option to disable modesetting support. This is useful in > cases where the guest only needs to use the GPU in a headless mode, or > (such as in the CrOS usage) window surfaces are proxied to a host > compositor. > > As the modesetting ioctls are a big surface area for potential security > bugs to be found (it's happened in the past, we should assume it will > again in the future), it makes sense to have a build option to disable > those ioctls in cases where they serve no legitimate purpose. > > v2: Use more if (IS_ENABLED(...)) > v3: Also permit the host to advertise no scanouts > v4: Spiff out commit msg > v5: Make num_scanouts==0 and DRM_VIRTIO_GPU_KMS=n behave the same > v6: Drop conditionally building virtgpu_display.c and early-out of > it's init/fini fxns instead Reviewed-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
