ARM: KVM: Add system register accessor macros
In order to move system register (CP15, mostly) access to C code, add a few macros to facilitate this, and minimize the difference between 32 and 64bit CP15 registers. This will get heavily used in the following patches. Acked-by: NChristoffer Dall <christoffer.dall@linaro.org> Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>
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