mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-07-22 04:37:32 -04:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source 
Commit fb091ff394 ("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>
This commit is contained in:
Will Deacon
2026-06-10 12:00:21 +01:00
parent ec7216f92e
commit 1940e70a81
3 changed files with 4 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/arch/arm64/silicon-errata.rst
View File

@@ -372,3 +372,5 @@ stable kernels.
+----------------+-----------------+-----------------+-----------------------------+
| Microsoft | Azure Cobalt 100| #3324339 | ARM64_ERRATUM_3194386 |
+----------------+-----------------+-----------------+-----------------------------+
| Microsoft | Azure Cobalt 100| #4193789 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+

1
arch/arm64/Kconfig
View File

@@ -1182,6 +1182,7 @@ 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

1
arch/arm64/kernel/cpu_errata.c
View File

@@ -365,6 +365,7 @@ 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),
{}
})),
},