Commit a0245b42 authored by Mark Brown's avatar Mark Brown Committed by Catalin Marinas
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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: default avatarMark Brown <broonie@kernel.org>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent eb9df6d6

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

+1 −4
Original line number Diff line number Diff line
@@ -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) {