From a0245b42f881be6f0ddf678ce7a0d150362938c8 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Wed, 15 Oct 2025 18:56:38 +0100 Subject: [PATCH] kselftest/arm64: Cover disabling streaming mode without SVE in fp-ptrace On a system which support SME but not SVE we can now disable streaming mode via ptrace by writing FPSIMD formatted data through NT_ARM_SVE with a VL of 0. Extend fp-ptrace to cover rather than skip these cases, relax the check for SVE writes of FPSIMD format data to not skip if SME is supported and accept 0 as the VL when performing the ptrace write. Signed-off-by: Mark Brown Signed-off-by: Catalin Marinas --- tools/testing/selftests/arm64/fp/fp-ptrace.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/tools/testing/selftests/arm64/fp/fp-ptrace.c b/tools/testing/selftests/arm64/fp/fp-ptrace.c index a85c19e9524e1..0114108ab25ff 100644 --- a/tools/testing/selftests/arm64/fp/fp-ptrace.c +++ b/tools/testing/selftests/arm64/fp/fp-ptrace.c @@ -1071,7 +1071,7 @@ static bool sve_write_supported(struct test_config *config) static bool sve_write_fpsimd_supported(struct test_config *config) { - if (!sve_supported()) + if (!sve_supported() && !sme_supported()) return false; if ((config->svcr_in & SVCR_ZA) != (config->svcr_expected & SVCR_ZA)) @@ -1231,9 +1231,6 @@ static void sve_write_fpsimd(pid_t child, struct test_config *config) vl = vl_expected(config); vq = __sve_vq_from_vl(vl); - if (!vl) - return; - iov.iov_len = SVE_PT_SIZE(vq, SVE_PT_REGS_FPSIMD); iov.iov_base = malloc(iov.iov_len); if (!iov.iov_base) { -- 2.47.3