[PATCH] drm: Simplify testing on UML with kunit.py

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DRM depends on IOMEM and DMA, introduce an additional Kconfig to pull in
IOMEM and DMA emulation on UML.
Since --kconfig_add usage is no longer needed, remove it from
documentation.

Signed-off-by: Michał Winiarski <michal.winiarski@xxxxxxxxx>
---
 Documentation/gpu/drm-internals.rst | 7 +------
 drivers/video/Kconfig               | 4 ++++
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/Documentation/gpu/drm-internals.rst b/Documentation/gpu/drm-internals.rst
index 5fd20a306718..c264a9587d21 100644
--- a/Documentation/gpu/drm-internals.rst
+++ b/Documentation/gpu/drm-internals.rst
@@ -228,16 +228,11 @@ follows:
 
 .. code-block:: bash
 
-	$ ./tools/testing/kunit/kunit.py run --kunitconfig=drivers/gpu/drm/tests \
-		--kconfig_add CONFIG_VIRTIO_UML=y \
-		--kconfig_add CONFIG_UML_PCI_OVER_VIRTIO=y
+	$ ./tools/testing/kunit/kunit.py run --kunitconfig=drivers/gpu/drm/tests
 
 .. note::
 	The configuration included in ``.kunitconfig`` should be as generic as
 	possible.
-	``CONFIG_VIRTIO_UML`` and ``CONFIG_UML_PCI_OVER_VIRTIO`` are not
-	included in it because they are only required for User Mode Linux.
-
 
 Legacy Support Code
 ===================
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 0587e21abad9..f3266c9fa8a6 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -52,5 +52,9 @@ if FB || SGI_NEWPORT_CONSOLE
 
 endif
 
+config DRM_UML_IO_EMULATION
+	def_bool y if UML && KUNIT
+	select UML_DMA_EMULATION
+	select UML_IOMEM_EMULATION
 
 endmenu
-- 
2.37.3




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