arm64: alternative: Introduce feature for GICv3 CPU interface
Add a new item to the feature set (ARM64_HAS_SYSREG_GIC_CPUIF) to indicate that we have a system register GIC CPU interface This will help KVM switching to alternative instruction patching. Reviewed-by: NAndre Przywara <andre.przywara@arm.com> Reviewed-by: NChristoffer Dall <christoffer.dall@linaro.org> Acked-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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