linux-kernel - [PATCH v8 2/5] arm64: cpufeature: add AmpereOne to BBML2 allow list

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: <20250917190323.3828347-3-yang@os.amperecomputing.com>
Date: Wed, 17 Sep 2025 12:02:08 -0700
From: Yang Shi <yang@...amperecomputing.com>
To: catalin.marinas@....com,
	will@...nel.org,
	ryan.roberts@....com,
	akpm@...ux-foundation.org,
	david@...hat.com,
	lorenzo.stoakes@...cle.com,
	ardb@...nel.org,
	dev.jain@....com,
	scott@...amperecomputing.com,
	cl@...two.org
Cc: yang@...amperecomputing.com,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: [PATCH v8 2/5] arm64: cpufeature: add AmpereOne to BBML2 allow list

AmpereOne supports BBML2 without conflict abort, add to the allow list.

Reviewed-by: Christoph Lameter (Ampere) <cl@...two.org>
Reviewed-by: Ryan Roberts <ryan.roberts@....com>
Acked-by: Catalin Marinas <catalin.marinas@....com>
Signed-off-by: Yang Shi <yang@...amperecomputing.com>
---
 arch/arm64/kernel/cpufeature.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index ef269a5a37e1..ba07eeff2a8d 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -2235,6 +2235,8 @@ static bool has_bbml2_noabort(const struct arm64_cpu_capabilities *caps, int sco
 	static const struct midr_range supports_bbml2_noabort_list[] = {
 		MIDR_REV_RANGE(MIDR_CORTEX_X4, 0, 3, 0xf),
 		MIDR_REV_RANGE(MIDR_NEOVERSE_V3, 0, 2, 0xf),
+		MIDR_ALL_VERSIONS(MIDR_AMPERE1),
+		MIDR_ALL_VERSIONS(MIDR_AMPERE1A),
 		{}
 	};
 
-- 
2.47.0