linux-kernel - [PATCH v3 6/6] perf tests tsc: Add checking helper is

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Date:   Wed,  2 Sep 2020 14:21:31 +0100
From:   Leo Yan <leo.yan@...aro.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, Wei Li <liwei391@...wei.com>,
        Al Grant <al.grant@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Kemeng Shi <shikemeng@...wei.com>,
        Ian Rogers <irogers@...gle.com>,
        John Garry <john.garry@...wei.com>,
        Stephane Eranian <eranian@...gle.com>,
        Nick Gasson <nick.gasson@....com>,
        Andi Kleen <ak@...ux.intel.com>,
        Steve MacLean <Steve.MacLean@...rosoft.com>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Will Deacon <will@...nel.org>,
        James Clark <james.clark@....com>, linux-kernel@...r.kernel.org
Cc:     Leo Yan <leo.yan@...aro.org>
Subject: [PATCH v3 6/6] perf tests tsc: Add checking helper is_supported()

So far tsc is enabled on x86_64, i386 and Arm64 architectures, add
checking helper to skip this testing for other architectures.

Signed-off-by: Leo Yan <leo.yan@...aro.org>
---
 tools/perf/tests/builtin-test.c     |  1 +
 tools/perf/tests/perf-time-to-tsc.c | 13 +++++++++++++
 tools/perf/tests/tests.h            |  1 +
 3 files changed, 15 insertions(+)

diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 67e6a1c6c793..4b57ea79d3e7 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -344,6 +344,7 @@ static struct test generic_tests[] = {
 	{
 		.desc = "Convert perf time to TSC",
 		.func = test__perf_time_to_tsc,
+		.is_supported = test__tsc_is_supported,
 	},
 	{
 		.func = NULL,
diff --git a/tools/perf/tests/perf-time-to-tsc.c b/tools/perf/tests/perf-time-to-tsc.c
index 026d32ed078e..41dadd4cd097 100644
--- a/tools/perf/tests/perf-time-to-tsc.c
+++ b/tools/perf/tests/perf-time-to-tsc.c
@@ -171,3 +171,16 @@ int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe
 	evlist__delete(evlist);
 	return err;
 }
+
+bool test__tsc_is_supported(void)
+{
+	/*
+	 * Except x86_64/i386 and Arm64, other archs don't support TSC in perf.
+	 * Just enable the test for x86_64/i386 and Arm64 archs.
+	 */
+#if defined(__x86_64__) || defined(__i386__) || defined(__aarch64__)
+	return true;
+#else
+	return false;
+#endif
+}
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 1633f54d6156..86466a518d8e 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -127,6 +127,7 @@ int test__perf_time_to_tsc(struct test *test, int subtest);
 bool test__bp_signal_is_supported(void);
 bool test__bp_account_is_supported(void);
 bool test__wp_is_supported(void);
+bool test__tsc_is_supported(void);
 
 #if defined(__arm__) || defined(__aarch64__)
 #ifdef HAVE_DWARF_UNWIND_SUPPORT
-- 
2.17.1