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72122c69d7
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
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230302233506.3146290-1-robdclark@gmail.com
25 lines
650 B
Plaintext
25 lines
650 B
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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config DRM_VIRTIO_GPU
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tristate "Virtio GPU driver"
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depends on DRM && VIRTIO_MENU && MMU
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select VIRTIO
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select DRM_KMS_HELPER
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select DRM_GEM_SHMEM_HELPER
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select VIRTIO_DMA_SHARED_BUFFER
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help
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This is the virtual GPU driver for virtio. It can be used with
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QEMU based VMMs (like KVM or Xen).
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If unsure say M.
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config DRM_VIRTIO_GPU_KMS
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bool "Virtio GPU driver modesetting support"
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depends on DRM_VIRTIO_GPU
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default y
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help
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Enable modesetting support for virtio GPU driver. This can be
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disabled in cases where only "headless" usage of the GPU is
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required.
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If unsure, say Y.
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