From: Mark Brown Date: Tue, 31 Jan 2023 22:56:35 +0000 (+0000) Subject: kselftest/arm64: Fix enumeration of systems without 128 bit SME for SSVE+ZA X-Git-Tag: v6.3-rc1~168^2~3^4~2 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=a7db82f18cd3d85ea8ef70fca5946b441187ed6d;p=thirdparty%2Fkernel%2Flinux.git kselftest/arm64: Fix enumeration of systems without 128 bit SME for SSVE+ZA The current signal handling tests for SME do not account for the fact that unlike SVE all SME vector lengths are optional so we can't guarantee that we will encounter the minimum possible VL, they will hang enumerating VLs on such systems. Abort enumeration when we find the lowest VL in the newly added ssve_za_regs test. Fixes: bc69da5ff087 ("kselftest/arm64: Verify simultaneous SSVE and ZA context generation") Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20230131-arm64-kselftest-sig-sme-no-128-v1-2-d47c13dc8e1e@kernel.org Signed-off-by: Catalin Marinas --- diff --git a/tools/testing/selftests/arm64/signal/testcases/ssve_za_regs.c b/tools/testing/selftests/arm64/signal/testcases/ssve_za_regs.c index 954a21f6121a2..1f62621794d50 100644 --- a/tools/testing/selftests/arm64/signal/testcases/ssve_za_regs.c +++ b/tools/testing/selftests/arm64/signal/testcases/ssve_za_regs.c @@ -34,6 +34,10 @@ static bool sme_get_vls(struct tdescr *td) vl &= PR_SME_VL_LEN_MASK; + /* Did we find the lowest supported VL? */ + if (vq < sve_vq_from_vl(vl)) + break; + /* Skip missing VLs */ vq = sve_vq_from_vl(vl);