arm64: Subscribe Microsoft Azure Cobalt 100 to erratum 3194386

JIRA: https://issues.redhat.com/browse/RHEL-108306

commit 3eddb10
Author: Easwar Hariharan <eahariha@linux.microsoft.com>
Date:   Thu Oct 3 22:52:35 2024 +0000

    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 75b3c43 ("arm64: errata:
    Expand speculative SSBS workaround")

    CC: Mark Rutland <mark.rutland@arm.com>
    CC: James More <james.morse@arm.com>
    CC: Will Deacon <will@kernel.org>
    CC: stable@vger.kernel.org # 6.6+
    Signed-off-by: Easwar Hariharan <eahariha@linux.microsoft.com>
    Link: https://lore.kernel.org/r/20241003225239.321774-1-eahariha@linux.microsoft.com
    Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Signed-off-by: Jeremy Linton <jlinton@redhat.com>

Author: jlinton

Documentation/arm64/silicon-errata.rst

@@ -306,3 +306,5 @@ stable kernels.
 +----------------+-----------------+-----------------+-----------------------------+
 | Microsoft      | Azure Cobalt 100| #2253138        | ARM64_ERRATUM_2253138       |
 +----------------+-----------------+-----------------+-----------------------------+
+| Microsoft      | Azure Cobalt 100| #3324339        | ARM64_ERRATUM_3194386       |
++----------------+-----------------+-----------------+-----------------------------+

arch/arm64/kernel/cpu_errata.c

@@ -448,6 +448,7 @@ static const struct midr_range erratum_spec_ssbs_list[] = {
 	MIDR_ALL_VERSIONS(MIDR_CORTEX_X3),
 	MIDR_ALL_VERSIONS(MIDR_CORTEX_X4),
 	MIDR_ALL_VERSIONS(MIDR_CORTEX_X925),
+	MIDR_ALL_VERSIONS(MIDR_MICROSOFT_AZURE_COBALT_100),
 	MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N1),
 	MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N2),
 	MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N3),