Commit 0c33aa18 authored by Mark Rutland's avatar Mark Rutland Committed by Will Deacon
Browse files

arm64: errata: Apply workarounds for Neoverse-V3AE 

Neoverse-V3AE is also affected by erratum #3312417, as described in its
Software Developer Errata Notice (SDEN) document:

  Neoverse V3AE (MP172) SDEN v9.0, erratum 3312417
  https://developer.arm.com/documentation/SDEN-2615521/9-0/



Enable the workaround for Neoverse-V3AE, and document this.

Signed-off-by: default avatarMark Rutland <mark.rutland@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: default avatarRyan Roberts <ryan.roberts@arm.com>
Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 3bbf004c

Documentation/arch/arm64/silicon-errata.rst

+2 −0
Original line number Diff line number Diff line
@@ -200,6 +200,8 @@ stable kernels. 
+----------------+-----------------+-----------------+-----------------------------+

| ARM            | Neoverse-V3     | #3312417        | ARM64_ERRATUM_3194386       |

+----------------+-----------------+-----------------+-----------------------------+

| ARM            | Neoverse-V3AE   | #3312417        | ARM64_ERRATUM_3194386       |

+----------------+-----------------+-----------------+-----------------------------+

| ARM            | MMU-500         | #841119,826419  | ARM_SMMU_MMU_500_CPRE_ERRATA|

|                |                 | #562869,1047329 |                             |

+----------------+-----------------+-----------------+-----------------------------+

arch/arm64/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -1138,6 +1138,7 @@ config ARM64_ERRATUM_3194386 
	  * ARM Neoverse-V1 erratum 3324341

	  * ARM Neoverse V2 erratum 3324336

	  * ARM Neoverse-V3 erratum 3312417

	  * ARM Neoverse-V3AE erratum 3312417



	  On affected cores "MSR SSBS, #0" instructions may not affect

	  subsequent speculative instructions, which may permit unexepected

arch/arm64/kernel/cpu_errata.c

+1 −0
Original line number Diff line number Diff line
@@ -546,6 +546,7 @@ static const struct midr_range erratum_spec_ssbs_list[] = { 
	MIDR_ALL_VERSIONS(MIDR_NEOVERSE_V1),

	MIDR_ALL_VERSIONS(MIDR_NEOVERSE_V2),

	MIDR_ALL_VERSIONS(MIDR_NEOVERSE_V3),

	MIDR_ALL_VERSIONS(MIDR_NEOVERSE_V3AE),

	{}

};

#endif