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drm/amdgpu: add CONFIG_GCOV_PROFILE_AMDGPU Kconfig option

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Add a Kconfig option to enable GCOV code coverage profiling for the
amdgpu driver, following the established upstream pattern used by
CONFIG_GCOV_PROFILE_FTRACE (kernel/trace), CONFIG_GCOV_PROFILE_RDS
(net/rds), and CONFIG_GCOV_PROFILE_URING (io_uring).

This allows CI systems to enable amdgpu code coverage entirely via
.config (e.g., scripts/config --enable GCOV_PROFILE_AMDGPU) without
manually editing the amdgpu Makefile. The option depends on both
DRM_AMDGPU and GCOV_KERNEL, defaults to n, and is therefore never
enabled in production or distro builds.

Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Vitaly Prosyak <vitaly.prosyak@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Vitaly Prosyak 2026-03-24 19:53:59 -04:00 committed by Alex Deucher
parent d290d6ee90
commit 1d0a26cf37
2 changed files with 21 additions and 0 deletions
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17
drivers/gpu/drm/amd/amdgpu/Kconfig
View File

@ -103,6 +103,23 @@ config DRM_AMDGPU_WERROR
Add -Werror to the build flags for amdgpu.ko.
Only enable this if you are warning code for amdgpu.ko.
config GCOV_PROFILE_AMDGPU
bool "Enable GCOV profiling on amdgpu"
depends on DRM_AMDGPU
depends on GCOV_KERNEL
default n
help
Enable GCOV profiling on the amdgpu driver for checking which
functions/lines are executed during testing. This adds compiler
instrumentation flags to all amdgpu source files, producing
.gcda/.gcno coverage data accessible via debugfs.
This increases the amdgpu module size by ~50% and adds ~2-5%
runtime overhead on GPU submission paths.
If unsure, say N.
source "drivers/gpu/drm/amd/acp/Kconfig"
source "drivers/gpu/drm/amd/display/Kconfig"
source "drivers/gpu/drm/amd/amdkfd/Kconfig"

4
drivers/gpu/drm/amd/amdgpu/Makefile
View File

@ -27,6 +27,10 @@ FULL_AMD_PATH=$(src)/..
DISPLAY_FOLDER_NAME=display
FULL_AMD_DISPLAY_PATH = $(FULL_AMD_PATH)/$(DISPLAY_FOLDER_NAME)
ifdef CONFIG_GCOV_PROFILE_AMDGPU
GCOV_PROFILE := y
endif
ccflags-y := -I$(FULL_AMD_PATH)/include/asic_reg \
-I$(FULL_AMD_PATH)/include \
-I$(FULL_AMD_PATH)/amdgpu \