VLAN_ETV
value |= VLAN_VTHM | VLAN_ETV;
u32 value = VLAN_ETV;
value &= ~(VLAN_VTHM | VLAN_ETV);
value |= VLAN_VTHM | VLAN_ETV;
value |= VLAN_ETV;
value &= ~(VLAN_VTHM | VLAN_ETV);