IXGBE_VTIVAR_MISC
regs_buff[13] = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);