linux-kernel - [PATCH 1/2] kselftest/arm64: Add a no-SVE loop after SVE in fp-pidbench

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20260127-arm64-selftests-fp-pidbench-post-sve-v1-1-3c78eda0d58b@kernel.org>
Date: Tue, 27 Jan 2026 16:16:14 +0000
From: Mark Brown <broonie@...nel.org>
To: Catalin Marinas <catalin.marinas@....com>, 
 Will Deacon <will@...nel.org>, Shuah Khan <shuah@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kselftest@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>
Subject: [PATCH 1/2] kselftest/arm64: Add a no-SVE loop after SVE in
 fp-pidbench

Some applications use SVE intermittently, one common case being where SVE
is used during statup (eg, by ld.so) but then rarely if ever during the
main application runtime. Add a repeat of the no SVE loop after we've done
the SVE loops to fp-pidbench to capture results for that.

Signed-off-by: Mark Brown <broonie@...nel.org>
---
 tools/testing/selftests/arm64/fp/fp-pidbench.S | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/testing/selftests/arm64/fp/fp-pidbench.S b/tools/testing/selftests/arm64/fp/fp-pidbench.S
index 73830f6bc99b..aeeadc7873dc 100644
--- a/tools/testing/selftests/arm64/fp/fp-pidbench.S
+++ b/tools/testing/selftests/arm64/fp/fp-pidbench.S
@@ -63,6 +63,10 @@ function _start
 	puts	"SVE used per syscall: "
 	test_loop "rdvl x0, #8"
 
+	// Test non-SVE execution after SVE
+	puts	"No SVE after SVE: "
+	test_loop
+
 	//  And we're done
 out:
 	mov	x0, #0

-- 
2.47.3