linux-kernel - Re: [PATCH] selftests: arm coresight: sysfsmode testing

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Message-ID: <1b7aaa17-48b7-45cd-b468-ef54ca048e31@linaro.org>
Date: Wed, 4 Dec 2024 11:15:42 +0000
From: James Clark <james.clark@...aro.org>
To: Linu Cherian <lcherian@...vell.com>,
 "coresight@...ts.linaro.org" <coresight@...ts.linaro.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 shuah@...nel.org, linux-kselftest@...r.kernel.org, sgoutham@...vell.com,
 gcherian@...vell.com, Mike Leach <mike.leach@...aro.org>,
 Suzuki K Poulose <Suzuki.Poulose@....com>, Leo Yan <leo.yan@....com>
Subject: Re: [PATCH] selftests: arm coresight: sysfsmode testing



On 29/11/2024 8:38 am, Linu Cherian wrote:
> Add sysfs mode selftest for ARM Coresight hardware tracer.
> 
> Signed-off-by: Linu Cherian <lcherian@...vell.com>
> ---
>   .../drivers/hwtracing/coresight/Makefile      |   5 +
>   .../hwtracing/coresight/sysfs_test_trace.sh   | 144 ++++++++++++++++++
>   2 files changed, 149 insertions(+)
>   create mode 100644 tools/testing/selftests/drivers/hwtracing/coresight/Makefile

Hi Linu,

You need to add this path into TARGETS for make install to work:

  TARGETS += drivers/dma-buf
+TARGETS += drivers/hwtracing/coresight
  TARGETS += drivers/s390x/uvdevice


>   create mode 100755 tools/testing/selftests/drivers/hwtracing/coresight/sysfs_test_trace.sh
> 
> diff --git a/tools/testing/selftests/drivers/hwtracing/coresight/Makefile b/tools/testing/selftests/drivers/hwtracing/coresight/Makefile
> new file mode 100644
> index 000000000000..7dc68ae1c0a9
> --- /dev/null
> +++ b/tools/testing/selftests/drivers/hwtracing/coresight/Makefile
> @@ -0,0 +1,5 @@
> +# SPDX-License-Identifier: GPL-2.0
> +
> +TEST_PROGS = sysfs_test_trace.sh
> +
> +include ../../../lib.mk
> diff --git a/tools/testing/selftests/drivers/hwtracing/coresight/sysfs_test_trace.sh b/tools/testing/selftests/drivers/hwtracing/coresight/sysfs_test_trace.sh
> new file mode 100755
> index 000000000000..0d6307fff1d2
> --- /dev/null
> +++ b/tools/testing/selftests/drivers/hwtracing/coresight/sysfs_test_trace.sh
> @@ -0,0 +1,144 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (C) 2024 Marvell.
> +
> +# Test Arm CoreSight trace capture in sysfs mode
> +# Based on tools/perf/tests/shell/test_arm_coresight.sh
> +
> +glb_err=0
> +
> +arm_cs_report() {
> +	if [ $2 != 0 ]; then
> +		echo "$1: FAIL"
> +		glb_err=$2
> +	else
> +		echo "$1: PASS"
> +	fi
> +}
> +
> +is_device_sink() {
> +	# If the node of "enable_sink" is existed under the device path, this
> +	# means the device is a sink device.
> +

Looks like you still need the skip for TPIU here the same as the Perf 
test. It's an external sink and doesn't have a readable file so the test 
fails.

With those changes, looks good. Thanks for adding the first sysfs test. 
Hopefully we can expand them more in the future.

Reviewed-by: James Clark <james.clark@...aro.org>