From: Mark Brown Date: Tue, 27 Dec 2022 13:06:35 +0000 (+0000) Subject: kselftest/arm64: Fix syscall-abi for systems without 128 bit SME X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=97ec597b26df774a257e3f8e97353fd1b4471615;p=linux.git kselftest/arm64: Fix syscall-abi for systems without 128 bit SME 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: 43e3f85523e4 ("kselftest/arm64: Add SME support to syscall ABI test") Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20221223-arm64-syscall-abi-sme-only-v1-1-4fabfbd62087@kernel.org Signed-off-by: Catalin Marinas --- diff --git a/tools/testing/selftests/arm64/abi/syscall-abi.c b/tools/testing/selftests/arm64/abi/syscall-abi.c index dd7ebe536d05f..ffe719b50c215 100644 --- a/tools/testing/selftests/arm64/abi/syscall-abi.c +++ b/tools/testing/selftests/arm64/abi/syscall-abi.c @@ -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);