KVM: arm64: Avoid repetitive stack access on host EL1 to EL2 exception

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Registers x0/x1 get repeateadly pushed and poped during a host
HVC call. Instead, leave the registers on the stack, trading
a store instruction on the fast path for an add on the slow path.

Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>

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Marc Zyngier 2020-10-24 10:56:55 +01:00

parent 29052f1b92

commit 83fa381f66

1 changed files with 3 additions and 3 deletions

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arch/arm64/kvm/hyp/nvhe/host.S

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