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In order to be able to trap Group-1 GICv3 system registers, we need to set ICH_HCR_EL2.TALL1 before entering the guest. This is conditionally done after having restored the guest's state, and cleared on exit. Tested-by: Alexander Graf <agraf@suse.de> Acked-by: David Daney <david.daney@cavium.com> Acked-by: Christoffer Dall <cdall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@linaro.org>