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[Why & How] Add GCOV_PROFILE := y to amdgpu_dm/Makefile under the CONFIG_DRM_AMD_DC_KUNIT_TEST guard so coverage instrumentation is only applied during KUnit builds, not all amdgpu_dm builds. Add coverage config options (CONFIG_GCOV, CONFIG_DEBUG_INFO, CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT, CONFIG_DEBUG_KERNEL) to tests/.kunitconfig so the kunit.py runner enables the kernel coverage configuration automatically. Assisted-by: Copilot:Claude-Sonnet-4.6 Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com> Signed-off-by: Alex Hung <alex.hung@amd.com> Signed-off-by: Ray Wu <ray.wu@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>