KVM_REG_MIPS_CP0
(KVM_REG_MIPS_CP0 | KVM_REG_SIZE_U32 | (8 * (_R) + (_S)))
(KVM_REG_MIPS_CP0 | KVM_REG_SIZE_U64 | (8 * (_R) + (_S)))
#define KVM_REG_MIPS_MAAR (KVM_REG_MIPS_CP0 | (1 << 8))