linux-kernel - [PATCH] arm64: Subscribe Microsoft Azure Cobalt 100 to erratum 3194386

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Message-ID: <20241003225239.321774-1-eahariha@linux.microsoft.com>
Date: Thu,  3 Oct 2024 22:52:35 +0000
From: Easwar Hariharan <eahariha@...ux.microsoft.com>
To: Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Jonathan Corbet <corbet@....net>,
	Mark Rutland <mark.rutland@....com>,
	Oliver Upton <oliver.upton@...ux.dev>,
	Easwar Hariharan <eahariha@...ux.microsoft.com>,
	Rob Herring <robh@...nel.org>,
	D Scott Phillips <scott@...amperecomputing.com>,
	linux-arm-kernel@...ts.infradead.org (moderated list:ARM64 PORT (AARCH64 ARCHITECTURE)),
	linux-doc@...r.kernel.org (open list:DOCUMENTATION),
	linux-kernel@...r.kernel.org (open list)
Cc: James More <james.morse@....com>,
	stable@...r.kernel.org
Subject: [PATCH] arm64: Subscribe Microsoft Azure Cobalt 100 to erratum 3194386

Add the Microsoft Azure Cobalt 100 CPU to the list of CPUs suffering
from erratum 3194386 added in commit 75b3c43eab59 ("arm64: errata:
Expand speculative SSBS workaround")

CC: Mark Rutland <mark.rutland@....com>
CC: James More <james.morse@....com>
CC: Will Deacon <will@...nel.org>
CC: stable@...r.kernel.org # 6.6+
Signed-off-by: Easwar Hariharan <eahariha@...ux.microsoft.com>
---
 Documentation/arch/arm64/silicon-errata.rst | 2 ++
 arch/arm64/kernel/cpu_errata.c              | 1 +
 2 files changed, 3 insertions(+)

diff --git a/Documentation/arch/arm64/silicon-errata.rst b/Documentation/arch/arm64/silicon-errata.rst
index 9eb5e70b4888..a7d03f1de72d 100644
--- a/Documentation/arch/arm64/silicon-errata.rst
+++ b/Documentation/arch/arm64/silicon-errata.rst
@@ -289,3 +289,5 @@ stable kernels.
 +----------------+-----------------+-----------------+-----------------------------+
 | Microsoft      | Azure Cobalt 100| #2253138        | ARM64_ERRATUM_2253138       |
 +----------------+-----------------+-----------------+-----------------------------+
+| Microsoft      | Azure Cobalt 100| #3324339        | ARM64_ERRATUM_3194386       |
++----------------+-----------------+-----------------+-----------------------------+
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index dfefbdf4073a..1a6fd56a13c1 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -449,6 +449,7 @@ static const struct midr_range erratum_spec_ssbs_list[] = {
 	MIDR_ALL_VERSIONS(MIDR_CORTEX_X925),
 	MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N1),
 	MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N2),
+	MIDR_ALL_VERSIONS(MIDR_MICROSOFT_AZURE_COBALT_100),
 	MIDR_ALL_VERSIONS(MIDR_NEOVERSE_V1),
 	MIDR_ALL_VERSIONS(MIDR_NEOVERSE_V2),
 	MIDR_ALL_VERSIONS(MIDR_NEOVERSE_V3),
-- 
2.43.0