KVM_REG_ARM_DEMUX_VAL_MASK
val = (id & KVM_REG_ARM_DEMUX_VAL_MASK)
val = (id & KVM_REG_ARM_DEMUX_VAL_MASK)
TEST_ASSERT(!(id & ~(REG_MASK | KVM_REG_ARM_DEMUX_ID_MASK | KVM_REG_ARM_DEMUX_VAL_MASK)),
reg_size, id & KVM_REG_ARM_DEMUX_VAL_MASK);