linux-kernel - [PATCH 2/4] arm64: cpufeature: add AmpereOne to BBML2 allow list

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Message-ID: <20250724221216.1998696-3-yang@os.amperecomputing.com>
Date: Thu, 24 Jul 2025 15:11:04 -0700
From: Yang Shi <yang@...amperecomputing.com>
To: ryan.roberts@....com,
	will@...nel.org,
	catalin.marinas@....com,
	akpm@...ux-foundation.org,
	Miko.Lenczewski@....com,
	dev.jain@....com,
	scott@...amperecomputing.com,
	cl@...two.org
Cc: yang@...amperecomputing.com,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/4] arm64: cpufeature: add AmpereOne to BBML2 allow list

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

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 7a3c404288d5..d2a8a509a58e 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -2230,6 +2230,8 @@ 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),
 		{}
 	};
 
-- 
2.50.0