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arm64: errata: Mitigate TLBI errata on NVIDIA Olympus CPU

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commit ec7216f92e4ebd485b1c6dc6aa3f6064b71a5768 upstream.

NVIDIA Olympus cores are affected by the TLBI completion issue tracked as
CVE-2025-10263. The existing ARM64_ERRATUM_4118414 handling already uses
ARM64_WORKAROUND_REPEAT_TLBI to issue an additional broadcast TLBI;DSB
sequence and ensure affected memory write effects are globally observed.

Add MIDR_NVIDIA_OLYMPUS to the repeat-TLBI match list so the same
mitigation is enabled on affected Olympus systems. Also document the
NVIDIA Olympus erratum in the arm64 silicon errata table and list it in
the Kconfig help text.

Signed-off-by: Shanker Donthineni <sdonthineni@nvidia.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
[Mark: backport to v7.1.y]
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Shanker Donthineni 2026-06-16 13:19:56 +01:00 • committed by Greg Kroah-Hartman
commit 845c842eb2
3 changed files with 5 additions and 1 deletions
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2
Documentation/arch/arm64/silicon-errata.rst
View file

@ -298,6 +298,8 @@ stable kernels.
+----------------+-----------------+-----------------+-----------------------------+
| NVIDIA | Carmel Core | N/A | NVIDIA_CARMEL_CNP_ERRATUM |
+----------------+-----------------+-----------------+-----------------------------+
| NVIDIA | Olympus core | T410-OLY-1029 | ARM64_ERRATUM_4118414 |
+----------------+-----------------+-----------------+-----------------------------+
| NVIDIA | T241 GICv3/4.x | T241-FABRIC-4 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
| NVIDIA | T241 MPAM | T241-MPAM-1 | N/A |

3
arch/arm64/Kconfig
View file

@ -1155,7 +1155,7 @@ config ARM64_ERRATUM_4193714
If unsure, say Y.
config ARM64_ERRATUM_4118414
bool "Cortex-*/Neoverse-*/C1-*: Completion of affected memory accesses might not be guaranteed by completion of a TLBI"
bool "Various: Completion of affected memory accesses might not be guaranteed by completion of a TLBI"
default y
select ARM64_WORKAROUND_REPEAT_TLBI
help
@ -1182,6 +1182,7 @@ config ARM64_ERRATUM_4118414
* ARM Neoverse-V2 erratum 4193787
* ARM Neoverse-V3 erratum 4193784
* ARM Neoverse-V3AE erratum 4193784
* NVIDIA Olympus erratum T410-OLY-1029
On affected cores, some memory accesses might not be completed by
broadcast TLB invalidation.

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

@ -364,6 +364,7 @@ static const struct arm64_cpu_capabilities arm64_repeat_tlbi_list[] = {
MIDR_ALL_VERSIONS(MIDR_NEOVERSE_V2),
MIDR_ALL_VERSIONS(MIDR_NEOVERSE_V3),
MIDR_ALL_VERSIONS(MIDR_NEOVERSE_V3AE),
MIDR_ALL_VERSIONS(MIDR_NVIDIA_OLYMPUS),
{}
})),
},