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authorSteven Price <steven.price@arm.com>2019-12-16 14:56:31 +0300
committerWill Deacon <will@kernel.org>2020-01-16 13:44:14 +0300
commit275fa0ea2cf7a84450f9c0ec0d9e7ec168ed2e2d (patch)
tree1a14bb38c7438a57a0f21266e1f81f5d0aed7186 /Documentation/arm64
parentdb0d46a58d34c7cd9d5ece98daf4b8afe3d770f8 (diff)
downloadlinux-275fa0ea2cf7a84450f9c0ec0d9e7ec168ed2e2d.tar.xz
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')
-rw-r--r--Documentation/arm64/silicon-errata.rst2
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 |