[PATCH] kselftest/arm64: Add coresight test

[Catalin Marinas]

On Wed, Jul 10, 2024 at 02:27:32PM +0800, Jeremy Szu wrote:
> Add a script to test the coresight functionalities by performing the
> perf test 'coresight'.
> 
> The script checks the prerequisites and launches a bundle of
> Coresight-related tests with a 180-second timeout.
> 
> Signed-off-by: Jeremy Szu <jszu at nvidia.com>

I have not idea how to test coresight, so adding Suzuki as well.

> ---
>  tools/testing/selftests/arm64/Makefile        |  2 +-
>  .../selftests/arm64/coresight/Makefile        |  5 +++
>  .../selftests/arm64/coresight/coresight.sh    | 40 +++++++++++++++++++
>  .../selftests/arm64/coresight/settings        |  1 +
>  4 files changed, 47 insertions(+), 1 deletion(-)
>  create mode 100644 tools/testing/selftests/arm64/coresight/Makefile
>  create mode 100755 tools/testing/selftests/arm64/coresight/coresight.sh
>  create mode 100644 tools/testing/selftests/arm64/coresight/settings
> 
> diff --git a/tools/testing/selftests/arm64/Makefile b/tools/testing/selftests/arm64/Makefile
> index 28b93cab8c0dd..2b788d7bab22d 100644
> --- a/tools/testing/selftests/arm64/Makefile
> +++ b/tools/testing/selftests/arm64/Makefile
> @@ -4,7 +4,7 @@
>  ARCH ?= $(shell uname -m 2>/dev/null || echo not)
>  
>  ifneq (,$(filter $(ARCH),aarch64 arm64))
> -ARM64_SUBTARGETS ?= tags signal pauth fp mte bti abi
> +ARM64_SUBTARGETS ?= tags signal pauth fp mte bti abi coresight
>  else
>  ARM64_SUBTARGETS :=
>  endif
> diff --git a/tools/testing/selftests/arm64/coresight/Makefile b/tools/testing/selftests/arm64/coresight/Makefile
> new file mode 100644
> index 0000000000000..1cc8c1f2a997e
> --- /dev/null
> +++ b/tools/testing/selftests/arm64/coresight/Makefile
> @@ -0,0 +1,5 @@
> +# SPDX-License-Identifier: GPL-2.0
> +
> +TEST_PROGS := coresight.sh
> +
> +include ../../lib.mk
> diff --git a/tools/testing/selftests/arm64/coresight/coresight.sh b/tools/testing/selftests/arm64/coresight/coresight.sh
> new file mode 100755
> index 0000000000000..e550957cf593b
> --- /dev/null
> +++ b/tools/testing/selftests/arm64/coresight/coresight.sh
> @@ -0,0 +1,40 @@
> +#!/bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +
> +skip() {
> +	echo "SKIP: $1"
> +	exit 4
> +}
> +
> +fail() {
> +	echo "FAIL: $1"
> +	exit 255
> +}
> +
> +is_coresight_supported() {
> +	if [ -d "/sys/bus/coresight/devices" ]; then
> +		return 0
> +	fi
> +	return 255
> +}
> +
> +if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
> +	[ "$(id -u)" -ne 0 ] && \
> +		skip "this test must be run as root."
> +	which perf >/dev/null 2>&1 || \
> +		skip "perf is not installed."
> +	perf test list 2>&1 | grep -qi 'coresight' || \
> +		skip "perf doesn't support testing coresight."
> +	is_coresight_supported || \
> +		skip "coresight is not supported."
> +
> +	cmd_output=$(perf test -vv 'coresight' 2>&1)
> +	perf_ret=$?
> +
> +	if [ $perf_ret -ne 0 ]; then
> +		fail "perf command returns non-zero."
> +	elif [[ $cmd_output == *"FAILED!"* ]]; then
> +		echo $cmd_output
> +		fail "perf test 'arm coresight' test failed!"
> +	fi
> +fi
> diff --git a/tools/testing/selftests/arm64/coresight/settings b/tools/testing/selftests/arm64/coresight/settings
> new file mode 100644
> index 0000000000000..a953c96aa16e1
> --- /dev/null
> +++ b/tools/testing/selftests/arm64/coresight/settings
> @@ -0,0 +1 @@
> +timeout=180
> -- 
> 2.34.1

-- 
Catalin