6.1-stable review patch. If anyone has any objections, please let me know.
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From: Mark Brown broonie@kernel.org
[ Upstream commit a7db82f18cd3d85ea8ef70fca5946b441187ed6d ]
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 broonie@kernel.org Link: https://lore.kernel.org/r/20230131-arm64-kselftest-sig-sme-no-128-v1-2-d47c1... Signed-off-by: Catalin Marinas catalin.marinas@arm.com Stable-dep-of: 5225b6562b9a ("kselftest/arm64: signal: fix/refactor SVE vector length enumeration") Signed-off-by: Sasha Levin sashal@kernel.org --- tools/testing/selftests/arm64/signal/testcases/ssve_za_regs.c | 4 ++++ 1 file changed, 4 insertions(+)
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);