KVM_REG_MIPS_CP0_MAAR
index = KVM_REG_MIPS_CP0_MAAR(i);
case KVM_REG_MIPS_CP0_MAAR(0) ... KVM_REG_MIPS_CP0_MAAR(0x3f):
idx = reg->id - KVM_REG_MIPS_CP0_MAAR(0);
case KVM_REG_MIPS_CP0_MAAR(0) ... KVM_REG_MIPS_CP0_MAAR(0x3f):
idx = reg->id - KVM_REG_MIPS_CP0_MAAR(0);