linux-kernel - [PATCH] kselftest/arm64: signal: Skip SVE signal test if not enough VLs supported

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Date:   Tue, 24 May 2022 11:31:49 +0100
From:   Cristian Marussi <cristian.marussi@....com>
To:     linux-kselftest@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        skhan@...uxfoundation.org,
        Cristian Marussi <cristian.marussi@....com>,
        Andre Przywara <andre.przywara@....com>,
        Mark Brown <broonie@...nel.org>
Subject: [PATCH] kselftest/arm64: signal: Skip SVE signal test if not enough VLs supported

On platform where SVE is supported but there are less than 2 VLs available
the signal SVE change test should be skipped instead of failing.

Reported-by: Andre Przywara <andre.przywara@....com>
Tested-by: Andre Przywara <andre.przywara@....com>
Cc: Mark Brown <broonie@...nel.org>
Signed-off-by: Cristian Marussi <cristian.marussi@....com>
---
 .../arm64/signal/testcases/fake_sigreturn_sve_change_vl.c       | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sve_change_vl.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sve_change_vl.c
index bb50b5adbf10..915821375b0a 100644
--- a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sve_change_vl.c
+++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_sve_change_vl.c
@@ -6,6 +6,7 @@
  * supported and is expected to segfault.
  */
 
+#include <kselftest.h>
 #include <signal.h>
 #include <ucontext.h>
 #include <sys/prctl.h>
@@ -40,6 +41,7 @@ static bool sve_get_vls(struct tdescr *td)
 	/* We need at least two VLs */
 	if (nvls < 2) {
 		fprintf(stderr, "Only %d VL supported\n", nvls);
+		td->result = KSFT_SKIP;
 		return false;
 	}
 
-- 
2.36.1