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When running 'make' in tools/testing/selftests/arm64/ without explicitly setting the OUTPUT variable, the build system will creates test directories (e.g., /bti) in the root filesystem due to OUTPUT defaulting to an empty string. This causes unintended pollution of the root directory. This patch adds proper handling for the OUTPUT variable: Sets OUTPUT to the current directory (.) if not specified Signed-off-by: tanze <tanze@kylinos.cn> Link: https://lore.kernel.org/r/20250515051839.3409658-1-tanze@kylinos.cn Signed-off-by: Will Deacon <will@kernel.org>
KSelfTest ARM64
===============
- These tests are arm64 specific and so not built or run but just skipped
completely when env-variable ARCH is found to be different than 'arm64'
and `uname -m` reports other than 'aarch64'.
- Holding true the above, ARM64 KSFT tests can be run within the KSelfTest
framework using standard Linux top-level-makefile targets:
$ make TARGETS=arm64 kselftest-clean
$ make TARGETS=arm64 kselftest
or
$ make -C tools/testing/selftests TARGETS=arm64 \
INSTALL_PATH=<your-installation-path> install
or, alternatively, only specific arm64/ subtargets can be picked:
$ make -C tools/testing/selftests TARGETS=arm64 ARM64_SUBTARGETS="tags signal" \
INSTALL_PATH=<your-installation-path> install
Further details on building and running KFST can be found in:
Documentation/dev-tools/kselftest.rst