arm64: errata: Apply workarounds for Neoverse-V3AE

commit 0c33aa1804d101c11ba1992504f17a42233f0e11 upstream.

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: Mark 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: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
[ Ryan: Trivial backport ]
Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/arm64/silicon-errata.rst b/Documentation/arm64/silicon-errata.rst
index 17da972099760936302157c12ea2be4a1be81b5d..951657baeaa8bbf56baf240c9185633afba48e30 100644 (file)
--- a/Documentation/arm64/silicon-errata.rst
+++ b/Documentation/arm64/silicon-errata.rst
@@ -134,6 +134,8 @@ stable kernels.
 +----------------+-----------------+-----------------+-----------------------------+
 | ARM            | Neoverse-V3     | #3312417        | ARM64_ERRATUM_3194386       |
 +----------------+-----------------+-----------------+-----------------------------+
+| ARM            | Neoverse-V3AE   | #3312417        | ARM64_ERRATUM_3194386       |
++----------------+-----------------+-----------------+-----------------------------+
 | ARM            | MMU-500         | #841119,826419  | N/A                         |
 +----------------+-----------------+-----------------+-----------------------------+
 +----------------+-----------------+-----------------+-----------------------------+

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 82eba7ffa1d58c46365c7d3894412401e274a48a..a242c46321378dbc6694f899fd338b2f255ebfec 100644 (file)
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -617,6 +617,7 @@ 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

diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index 1e1dfe59a469e2968efec87bcf30b38f0da80c40..ebf39755eaf5c60294c5dc66a0bceb0dfdf923aa 100644 (file)
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -863,6 +863,7 @@ 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