[PATCH v1 0/7] KVM: arm64: Fix handling of host fpsimd/sve state in protected mode

Mark Brown broonie at kernel.org
Mon May 20 10:53:10 PDT 2024


On Mon, May 20, 2024 at 05:37:36PM +0000, Oliver Upton wrote:

> Wouldn't it be equally valid to just zero the state that will not be
> preserved regardless of whether or not the guest used fpsimd/sve?

FWIW I've had this benchmarked for some implementations as causing a low
single digits percentage overhead on syscalls (as you'd expect there's
additional overhead when VLs over 128 are supported).
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