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| author | Steven Price <steven.price@arm.com> | 2019-12-16 11:56:31 +0000 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-01-16 10:44:14 +0000 |
| commit | 275fa0ea2cf7a84450f9c0ec0d9e7ec168ed2e2d (patch) | |
| tree | 1a14bb38c7438a57a0f21266e1f81f5d0aed7186 /Documentation/arm64/silicon-errata.rst | |
| parent | db0d46a58d34c7cd9d5ece98daf4b8afe3d770f8 (diff) | |
| download | lwn-275fa0ea2cf7a84450f9c0ec0d9e7ec168ed2e2d.tar.gz lwn-275fa0ea2cf7a84450f9c0ec0d9e7ec168ed2e2d.zip | |
arm64: Workaround for Cortex-A55 erratum 1530923
Cortex-A55 erratum 1530923 allows TLB entries to be allocated as a
result of a speculative AT instruction. This may happen in the middle of
a guest world switch while the relevant VMSA configuration is in an
inconsistent state, leading to erroneous content being allocated into
TLBs.
The same workaround as is used for Cortex-A76 erratum 1165522
(WORKAROUND_SPECULATIVE_AT_VHE) can be used here. Note that this
mandates the use of VHE on affected parts.
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'Documentation/arm64/silicon-errata.rst')
| -rw-r--r-- | Documentation/arm64/silicon-errata.rst | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/arm64/silicon-errata.rst b/Documentation/arm64/silicon-errata.rst index 99b2545455ff..9120e59578dc 100644 --- a/Documentation/arm64/silicon-errata.rst +++ b/Documentation/arm64/silicon-errata.rst @@ -88,6 +88,8 @@ stable kernels. +----------------+-----------------+-----------------+-----------------------------+ | ARM | Cortex-A76 | #1463225 | ARM64_ERRATUM_1463225 | +----------------+-----------------+-----------------+-----------------------------+ +| ARM | Cortex-A55 | #1530923 | ARM64_ERRATUM_1530923 | ++----------------+-----------------+-----------------+-----------------------------+ | ARM | Neoverse-N1 | #1188873,1418040| ARM64_ERRATUM_1418040 | +----------------+-----------------+-----------------+-----------------------------+ | ARM | Neoverse-N1 | #1349291 | N/A | |