As the device S79FS01GS has dual dies with independent pins, it will be possible to connect each S25FS512S devices inside S79FS01GS to two separate QSPI masters.
We would like to know more details about your application. Could you please clarify, why do you want to control S79FS01GS using two separate QSPI masters?
Thanks and Regards,
We have a possible application where two devices need flash but we only have space on the PCB for one IC.
Electrical Systems Engineer