[PATCH v12 31/40] kselftest/arm64: sme: Add SME support to vlset

From: Mark Brown <broonie@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
	Shuah Khan <skhan@linuxfoundation.org>,
	Shuah Khan <shuah@kernel.org>
Cc: Alan Hayward <alan.hayward@arm.com>,
	Luis Machado <luis.machado@arm.com>,
	Salil Akerkar <Salil.Akerkar@arm.com>,
	Basant Kumar Dwivedi <Basant.KumarDwivedi@arm.com>,
	Szabolcs Nagy <szabolcs.nagy@arm.com>,
	James Morse <james.morse@arm.com>,
	Alexandru Elisei <alexandru.elisei@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-kselftest@vger.kernel.org, kvmarm@lists.cs.columbia.edu,
	Mark Brown <broonie@kernel.org>
Subject: [PATCH v12 31/40] kselftest/arm64: sme: Add SME support to vlset
Date: Fri, 25 Feb 2022 16:59:14 +0000	[thread overview]
Message-ID: <20220225165923.1474372-32-broonie@kernel.org> (raw)
In-Reply-To: <20220225165923.1474372-1-broonie@kernel.org>

The Scalable Matrix Extenions (SME) introduces additional register state
with configurable vector lengths, similar to SVE but configured separately.
Extend vlset to support configuring this state with a --sme or -s command
line option.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
---
 tools/testing/selftests/arm64/fp/vlset.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/arm64/fp/vlset.c b/tools/testing/selftests/arm64/fp/vlset.c
index 308d27a68226..76912a581a95 100644
--- a/tools/testing/selftests/arm64/fp/vlset.c
+++ b/tools/testing/selftests/arm64/fp/vlset.c
@@ -22,12 +22,15 @@ static int inherit = 0;
 static int no_inherit = 0;
 static int force = 0;
 static unsigned long vl;
+static int set_ctl = PR_SVE_SET_VL;
+static int get_ctl = PR_SVE_GET_VL;
 
 static const struct option options[] = {
 	{ "force",	no_argument, NULL, 'f' },
 	{ "inherit",	no_argument, NULL, 'i' },
 	{ "max",	no_argument, NULL, 'M' },
 	{ "no-inherit",	no_argument, &no_inherit, 1 },
+	{ "sme",	no_argument, NULL, 's' },
 	{ "help",	no_argument, NULL, '?' },
 	{}
 };
@@ -50,6 +53,9 @@ static int parse_options(int argc, char **argv)
 		case 'M':	vl = SVE_VL_MAX; break;
 		case 'f':	force = 1; break;
 		case 'i':	inherit = 1; break;
+		case 's':	set_ctl = PR_SME_SET_VL;
+				get_ctl = PR_SME_GET_VL;
+				break;
 		case 0:		break;
 		default:	goto error;
 		}
@@ -125,14 +131,14 @@ int main(int argc, char **argv)
 	if (inherit)
 		flags |= PR_SVE_VL_INHERIT;
 
-	t = prctl(PR_SVE_SET_VL, vl | flags);
+	t = prctl(set_ctl, vl | flags);
 	if (t < 0) {
 		fprintf(stderr, "%s: PR_SVE_SET_VL: %s\n",
 			program_name, strerror(errno));
 		goto error;
 	}
 
-	t = prctl(PR_SVE_GET_VL);
+	t = prctl(get_ctl);
 	if (t == -1) {
 		fprintf(stderr, "%s: PR_SVE_GET_VL: %s\n",
 			program_name, strerror(errno));
-- 
2.30.2


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