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authorMarc Zyngier <maz@kernel.org>2024-04-19 13:29:23 +0300
committerMarc Zyngier <maz@kernel.org>2024-04-20 14:42:50 +0300
commita07e9345615fb7e7dd4fd5d88d5aaf49085739d0 (patch)
treebb46f9950887369ccc9677f0852111286f857818 /tools/perf/scripts/python/export-to-sqlite.py
parent80d8b55a57a18b0b1dac951ea28bfd657b14facc (diff)
downloadlinux-a07e9345615fb7e7dd4fd5d88d5aaf49085739d0.tar.xz
KVM: arm64: Constraint PAuth support to consistent implementations
PAuth comes it two parts: address authentication, and generic authentication. So far, KVM mandates that both are implemented. PAuth also comes in three flavours: Q5, Q3, and IMPDEF. Only one can be implemented for any of address and generic authentication. Crucially, the architecture doesn't mandate that address and generic authentication implement the *same* flavour. This would make implementing ERETAx very difficult for NV, something we are not terribly keen on. So only allow PAuth support for KVM on systems that are not totally insane. Which is so far 100% of the known HW. Reviewed-by: Oliver Upton <oliver.upton@linux.dev> Link: https://lore.kernel.org/r/20240419102935.1935571-4-maz@kernel.org Signed-off-by: Marc Zyngier <maz@kernel.org>
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