GICD_IIDR_VARIANT_SHIFT   69 include/linux/irqchip/arm-gic-v3.h #define GICD_IIDR_VARIANT_MASK		(0xf << GICD_IIDR_VARIANT_SHIFT)
GICD_IIDR_VARIANT_SHIFT   71 include/linux/irqchip/arm-gic.h #define GICD_IIDR_VARIANT_MASK		(0xf << GICD_IIDR_VARIANT_SHIFT)