From: Will Deacon Date: Tue, 16 Jun 2026 05:15:52 +0000 (+0100) Subject: arm64: errata: Mitigate TLBI errata on Microsoft Azure Cobalt 100 CPU X-Git-Tag: v6.12.94~8 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2321cb9e80eaeedbc22ede60ee03404fe521cd56;p=thirdparty%2Fkernel%2Fstable.git 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 [Mark: backport to v6.12.y] Signed-off-by: Mark Rutland Signed-off-by: Greg Kroah-Hartman --- diff --git a/Documentation/arch/arm64/silicon-errata.rst b/Documentation/arch/arm64/silicon-errata.rst index 81e4ea2d4917b..e2ec25d14f1c9 100644 --- a/Documentation/arch/arm64/silicon-errata.rst +++ b/Documentation/arch/arm64/silicon-errata.rst @@ -346,3 +346,5 @@ 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 297e2e391104d..012ec170232ea 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1166,6 +1166,7 @@ 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 42699eb454df8..80e47d3e86af4 100644 --- a/arch/arm64/kernel/cpu_errata.c +++ b/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), {} })), },