KVM: arm64: nv: Honor guest hypervisor's FP/SVE traps in CPTR_EL2

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Start folding the guest hypervisor's FP/SVE traps into the value
programmed in hardware. Note that as of writing this is dead code, since
KVM does a full put() / load() for every nested exception boundary which
saves + flushes the FP/SVE state.

However, this will become useful when we can keep the guest's FP/SVE
state alive across a nested exception boundary and the host no longer
needs to conservatively program traps.

Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240620164653.1130714-12-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

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Oliver Upton 2024-06-20 16:46:48 +00:00

parent 0cfc85b8f5

commit 5326303bb7

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arch/arm64/kvm/hyp/vhe/switch.c

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