You may see a warning message like the one above when compiling your Intel® Stratix® 10 design in the Intel Quartus® Prime Pro software version 17.0 and later. The warning message may refer to one of the MSEL (0..2) pins and an SDM_IO function that is being used on that pin (e.g. CONF_DONE, INIT_DONE, HPS_COLD_RESET, HPS_WARM_RESET etc)
There is no requirement to make any internal connection to this pin and this warning message can be safely ignored.