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

jira VULN-187519
cve CVE-2025-10263
commit-author Will Deacon <will@kernel.org>
commit -
commit-source-sha 1940e70
commit-source arm64
upstream-diff silicon-errata.rst at different path and required manual
  conflict resolution due to missing entries in our branch.
  arm64_repeat_tlbi_cpus[] is a flat struct midr_range array on 4.18;
  added MIDR_ALL_VERSIONS() entry directly instead of nested
  ERRATA_MIDR_RANGE_LIST().

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

@@ -190,3 +190,6 @@ stable kernels.
 +----------------+-----------------+-----------------+-----------------------------+
 | Fujitsu        | A64FX           | E#010001        | FUJITSU_ERRATUM_010001      |
 +----------------+-----------------+-----------------+-----------------------------+
++----------------+-----------------+-----------------+-----------------------------+
+| Microsoft      | Azure Cobalt 100| #4193789        | ARM64_ERRATUM_4118414       |
++----------------+-----------------+-----------------+-----------------------------+

arch/arm64/Kconfig

@@ -650,6 +650,7 @@ 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

@@ -686,6 +686,7 @@ static const struct midr_range arm64_repeat_tlbi_cpus[] = {
 	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),
 #endif
 	{},
 };