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From:   James Clark <james.clark@arm.com>
To:     linux-perf-users@vger.kernel.org
Cc:     broonie@kernel.org, Aishwarya.TCV@arm.com,
        James Clark <james.clark@arm.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        Ian Rogers <irogers@google.com>,
        Adrian Hunter <adrian.hunter@intel.com>,
        linux-kernel@vger.kernel.org
Subject: [RFC PATCH] perf tools: Add a place to put kernel config fragments for test runs
Date:   Wed, 14 Jun 2023 15:02:19 +0100
Message-Id: <20230614140219.2335639-1-james.clark@arm.com>
MIME-Version: 1.0
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Precedence: bulk

We are currently keeping something like this in our CI because defconfig
doesn't give full coverage. It's not complete yet, but is a starting
point as a place to add to when a specific test needs something extra to
run.

The RFC is for discussion on folder placement and file naming etc.

Signed-off-by: James Clark <james.clark@arm.com>
---
 tools/perf/tests/config-fragments/README  |  7 +++++++
 tools/perf/tests/config-fragments/aarch64 |  1 +
 tools/perf/tests/config-fragments/config  | 11 +++++++++++
 3 files changed, 19 insertions(+)
 create mode 100644 tools/perf/tests/config-fragments/README
 create mode 100644 tools/perf/tests/config-fragments/aarch64
 create mode 100644 tools/perf/tests/config-fragments/config

diff --git a/tools/perf/tests/config-fragments/README b/tools/perf/tests/config-fragments/README
new file mode 100644
index 000000000000..e816cfb1b96d
--- /dev/null
+++ b/tools/perf/tests/config-fragments/README
@@ -0,0 +1,7 @@
+This folder is for kernel config fragments that can be merged with
+defconfig to give full test coverage of a perf test run. This is only
+an optimistic set as some features require hardware support in order to
+pass and not skip.
+
+'config' is shared across all platforms, and for arch specific files,
+the file name should match that returned by 'uname -m'.
diff --git a/tools/perf/tests/config-fragments/aarch64 b/tools/perf/tests/config-fragments/aarch64
new file mode 100644
index 000000000000..64c4ab17cd58
--- /dev/null
+++ b/tools/perf/tests/config-fragments/aarch64
@@ -0,0 +1 @@
+CONFIG_CORESIGHT_SOURCE_ETM4X=y
diff --git a/tools/perf/tests/config-fragments/config b/tools/perf/tests/config-fragments/config
new file mode 100644
index 000000000000..c340b3195fca
--- /dev/null
+++ b/tools/perf/tests/config-fragments/config
@@ -0,0 +1,11 @@
+CONFIG_TRACEPOINTS=y
+CONFIG_STACKTRACE=y
+CONFIG_NOP_TRACER=y
+CONFIG_RING_BUFFER=y
+CONFIG_EVENT_TRACING=y
+CONFIG_CONTEXT_SWITCH_TRACER=y
+CONFIG_TRACING=y
+CONFIG_GENERIC_TRACER=y
+CONFIG_FTRACE=y
+CONFIG_FTRACE_SYSCALLS=y
+CONFIG_BRANCH_PROFILE_NONE=y
-- 
2.34.1