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| author | Will Deacon <will@kernel.org> | 2026-06-16 13:22:31 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-06-19 13:48:13 +0200 |
| commit | 7da48313876ec620c803705b080421f24cc1b2e8 (patch) | |
| tree | 45ed94ec395a73bac5a2bdc50f34b9612993d237 | |
| parent | d3f35d35395ff9d2a1cc2ba253d89f8f7fcaeea6 (diff) | |
| download | linux-7da48313876ec620c803705b080421f24cc1b2e8.tar.gz linux-7da48313876ec620c803705b080421f24cc1b2e8.zip | |
arm64: errata: Mitigate TLBI errata on Microsoft Azure Cobalt 100 CPU
commit 1940e70a8144bf75e6df26bf6f600862ea7f7ea1 upstream.
Commit fb091ff39479 ("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>
[Mark: backport to v7.0.y]
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | Documentation/arch/arm64/silicon-errata.rst | 2 | ||||
| -rw-r--r-- | arch/arm64/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm64/kernel/cpu_errata.c | 1 |
3 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/arch/arm64/silicon-errata.rst b/Documentation/arch/arm64/silicon-errata.rst index 9d680c1a7bef..6046648f6d51 100644 --- a/Documentation/arch/arm64/silicon-errata.rst +++ b/Documentation/arch/arm64/silicon-errata.rst @@ -352,3 +352,5 @@ stable kernels. +----------------+-----------------+-----------------+-----------------------------+ | Microsoft | Azure Cobalt 100| #3324339 | ARM64_ERRATUM_3194386 | +----------------+-----------------+-----------------+-----------------------------+ +| Microsoft | Azure Cobalt 100| #4193789 | ARM64_ERRATUM_4118414 | ++----------------+-----------------+-----------------+-----------------------------+ diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index c5808f3cba62..81fa36603e3e 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1204,6 +1204,7 @@ 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 diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c index 0b39556c8834..476a37c82108 100644 --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -364,6 +364,7 @@ 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), {} })), }, |