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Mon, 09 Dec 2024 02:52:44 -0800 (PST) From: Weizhao Ouyang To: Catalin Marinas , Will Deacon , Shuah Khan , Weizhao Ouyang , Mark Brown 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 Message-ID: <20241209105237.10498-1-o451686892@gmail.com> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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 --- 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: