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 <[email protected]> --- 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 _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
