This is a note to let you know that I've just added the patch titled
kselftest/arm64: Fix syscall-abi for systems without 128 bit SME
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kselftest-arm64-fix-syscall-abi-for-systems-without-.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f32c3b80972d9b2fcf7481aae0d166f924d236c3
Author: Mark Brown <broonie@xxxxxxxxxx>
Date: Tue Dec 27 13:06:35 2022 +0000
kselftest/arm64: Fix syscall-abi for systems without 128 bit SME
[ Upstream commit 97ec597b26df774a257e3f8e97353fd1b4471615 ]
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 <broonie@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20221223-arm64-syscall-abi-sme-only-v1-1-4fabfbd62087@xxxxxxxxxx
Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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);
