arm64: errata: Mitigate TLBI errata on Microsoft Azure Cobalt 100 CPU

jira VULN-187523
cve CVE-2025-10263
commit-author Will Deacon <will@kernel.org>
commit -
commit-source-sha 1940e70
commit-source arm64

Commit fb091ff ("arm64: Subscribe Microsoft Azure Cobalt 100 to ARM
Neoverse N2 errata") states that Microsoft Azure Cobalt 100 CPU "is a
Microsoft implemented CPU based on r0p0 of the ARM Neoverse N2 CPU, and
therefore suffers from all the same errata.".

So enable the workaround for the latest broadcast TLB invalidation bug
on these parts.

	Signed-off-by: Will Deacon <will@kernel.org>
(cherry picked from commit 1940e70)
	Signed-off-by: Brett Mastbergen <bmastbergen@ciq.com>

Author: bmastbergen

Documentation/arm64/silicon-errata.rst

@@ -321,3 +321,5 @@ stable kernels.
 +----------------+-----------------+-----------------+-----------------------------+
 | Microsoft      | Azure Cobalt 100| #2253138        | ARM64_ERRATUM_2253138       |
 +----------------+-----------------+-----------------+-----------------------------+
+| Microsoft      | Azure Cobalt 100| #4193789        | ARM64_ERRATUM_4118414       |
++----------------+-----------------+-----------------+-----------------------------+

arch/arm64/Kconfig

@@ -1096,6 +1096,7 @@ config ARM64_ERRATUM_4118414
 	  * ARM Neoverse-V2 erratum 4193787
 	  * ARM Neoverse-V3 erratum 4193784
 	  * ARM Neoverse-V3AE erratum 4193784
+	  * Microsoft Azure Cobalt 100 4193789
 	  * NVIDIA Olympus erratum T410-OLY-1029
 
 	  On affected cores, some memory accesses might not be completed by

arch/arm64/kernel/cpu_errata.c

@@ -250,6 +250,7 @@ static const struct arm64_cpu_capabilities arm64_repeat_tlbi_list[] = {
 			MIDR_ALL_VERSIONS(MIDR_NEOVERSE_V3),
 			MIDR_ALL_VERSIONS(MIDR_NEOVERSE_V3AE),
 			MIDR_ALL_VERSIONS(MIDR_NVIDIA_OLYMPUS),
+			MIDR_ALL_VERSIONS(MIDR_MICROSOFT_AZURE_COBALT_100),
 			{}
 		})),
 	},