Commit e8c44514 authored by Mark Brown's avatar Mark Brown Committed by Catalin Marinas
Browse files

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: default avatarMark Brown <broonie@kernel.org>
Reviewed-by: default avatarShuah Khan <skhan@linuxfoundation.org>
Acked-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20220419112247.711548-30-broonie@kernel.org


Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 6d51b188

tools/testing/selftests/arm64/fp/vlset.c

+8 −2
Original line number Diff line number Diff line
@@ -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));