mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-30 22:26:55 +00:00
Code Issues Releases Wiki Activity

kselftest/arm64: Fix syscall-abi for systems without 128 bit SME

Browse source 
SME does not mandate any specific VL so we may not have 128 bit SME but
the algorithm used for enumerating VLs assumes that we will. Add the
required check to ensure that the algorithm terminates.

Fixes: 43e3f85523 ("kselftest/arm64: Add SME support to syscall ABI test")
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20221223-arm64-syscall-abi-sme-only-v1-1-4fabfbd62087@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Mark Brown 2022-12-27 13:06:35 +00:00 committed by Catalin Marinas
parent b7bfaa761d
commit 97ec597b26
1 changed files with 8 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
tools/testing/selftests/arm64/abi/syscall-abi.c
View file

@ -390,6 +390,10 @@ static void test_one_syscall(struct syscall_cfg *cfg)
sme_vl &= PR_SME_VL_LEN_MASK;
/* Found lowest VL */
if (sve_vq_from_vl(sme_vl) > sme_vq)
break;
if (sme_vq != sve_vq_from_vl(sme_vl))
sme_vq = sve_vq_from_vl(sme_vl);
@ -461,6 +465,10 @@ int sme_count_vls(void)
vl &= PR_SME_VL_LEN_MASK;
/* Found lowest VL */
if (sve_vq_from_vl(vl) > vq)
break;
if (vq != sve_vq_from_vl(vl))
vq = sve_vq_from_vl(vl);