Commit 50806fd9 authored by Mark Brown's avatar Mark Brown Committed by Catalin Marinas
Browse files

kselftest/arm64: Skip VL_INHERIT tests for unsupported vector types 



Currently we unconditionally test the ability to set the vector length
inheritance flag via ptrace meaning that we generate false failures on
systems that don't support SVE when we attempt to set the vector length
there. Check the hwcap and mark the tests as skipped when it's not present.

Fixes: 0ba1ce1e ("selftests: arm64: Add coverage of ptrace flags for SVE VL inheritance")
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Reviewed-by: default avatarShuah Khan <skhan@linuxfoundation.org>
Link: https://lore.kernel.org/r/20220124175527.3260234-2-broonie@kernel.org


Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 3758a6c7

tools/testing/selftests/arm64/fp/sve-ptrace.c

+8 −1
Original line number Diff line number Diff line
@@ -557,7 +557,14 @@ static int do_parent(pid_t child) 
		}



		/* prctl() flags */

		if (getauxval(vec_types[i].hwcap_type) & vec_types[i].hwcap) {

			ptrace_set_get_inherit(child, &vec_types[i]);

		} else {

			ksft_test_result_skip("%s SVE_PT_VL_INHERIT set\n",

					      vec_types[i].name);

			ksft_test_result_skip("%s SVE_PT_VL_INHERIT cleared\n",

					      vec_types[i].name);

		}



		/* Step through every possible VQ */

		for (vq = SVE_VQ_MIN; vq <= SVE_VQ_MAX; vq++) {