From: Weizhao Ouyang <o451686892@gmail.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Shuah Khan <shuah@kernel.org>,
Weizhao Ouyang <o451686892@gmail.com>,
Mark Brown <broonie@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] kselftest/arm64: abi: fix SVCR detection
Date: Mon, 9 Dec 2024 18:52:37 +0800 [thread overview]
Message-ID: <20241209105237.10498-1-o451686892@gmail.com> (raw)
When using svcr_in to check ZA and Streaming Mode, we should make sure
that the value in x2 is correct, otherwise it may trigger an Illegal
instruction if FEAT_SVE and !FEAT_SME.
Fixes: 43e3f85523e4 ("kselftest/arm64: Add SME support to syscall ABI test")
Signed-off-by: Weizhao Ouyang <o451686892@gmail.com>
---
tools/testing/selftests/arm64/abi/syscall-abi-asm.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/arm64/abi/syscall-abi-asm.S b/tools/testing/selftests/arm64/abi/syscall-abi-asm.S
index df3230fdac39..98cde4f37abf 100644
--- a/tools/testing/selftests/arm64/abi/syscall-abi-asm.S
+++ b/tools/testing/selftests/arm64/abi/syscall-abi-asm.S
@@ -81,9 +81,9 @@ do_syscall:
stp x27, x28, [sp, #96]
// Set SVCR if we're doing SME
- cbz x1, 1f
adrp x2, svcr_in
ldr x2, [x2, :lo12:svcr_in]
+ cbz x1, 1f
msr S3_3_C4_C2_2, x2
1:
--
2.45.2
next reply other threads:[~2024-12-09 10:52 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-09 10:52 Weizhao Ouyang [this message]
2024-12-09 12:36 ` [PATCH] kselftest/arm64: abi: fix SVCR detection Mark Brown
2024-12-09 12:51 ` Weizhao Ouyang
2024-12-09 13:12 ` Mark Brown
2024-12-09 13:26 ` Weizhao Ouyang
2024-12-09 13:51 ` Mark Brown
2024-12-09 14:04 ` Weizhao Ouyang
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