[RFC PATCH v3 16/16] Documentation: arm64: Document ARM Neoverse-N1 erratum #1688567
From: Alexandru Elisei <hidden>
Date: 2020-10-27 17:30:49
Also in:
kvmarm
Subsystem:
documentation, the rest · Maintainers:
Jonathan Corbet, Linus Torvalds
According to erratum #1688567, a SPE buffer write that results in an Access flag fault or Permission fault at stage 2 is reported with an unsupported PMBSR_EL1.FSC code. KVM avoids SPE stage 2 faults altogether by requiring userspace to lock the guest memory in RAM and pre-mapping it in stage 2 before the VM is started. As a result, KVM is not impacted by this erratum. Signed-off-by: Alexandru Elisei <redacted> --- Documentation/arm64/silicon-errata.rst | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/Documentation/arm64/silicon-errata.rst b/Documentation/arm64/silicon-errata.rst
index d3587805de64..1f6c403fd555 100644
--- a/Documentation/arm64/silicon-errata.rst
+++ b/Documentation/arm64/silicon-errata.rst@@ -96,6 +96,8 @@ stable kernels. +----------------+-----------------+-----------------+-----------------------------+ | ARM | Neoverse-N1 | #1542419 | ARM64_ERRATUM_1542419 | +----------------+-----------------+-----------------+-----------------------------+ +| ARM | Neoverse-N1 | #1688567 | N/A | ++----------------+-----------------+-----------------+-----------------------------+ | ARM | MMU-500 | #841119,826419 | N/A | +----------------+-----------------+-----------------+-----------------------------+ +----------------+-----------------+-----------------+-----------------------------+
--
2.29.1
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