From e8c4451480d0cb37cbc69160113b1f4ff211cd16 Mon Sep 17 00:00:00 2001
From: Mark Brown <broonie@kernel.org>
Date: Tue, 19 Apr 2022 12:22:37 +0100
Subject: [PATCH] kselftest/arm64: sme: Add SME support to vlset
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>
Link: https://lore.kernel.org/r/20220419112247.711548-30-broonie@kernel.org
Signed-off-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 308d27a682269..76912a581a95f 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