Does it make sense for a device/board to do drive_get_next(IF_NONE) ? At the moment we have exactly one user of this, which is hw/misc/sifive_u_otp.c. This is a model of a one-time-programmable fuse, and the drive is providing the backing store for the fuse contents. Borrowing an IF_NONE for this seems a bit odd, but it's not clear any of the other IF_ types is better.
We also just (this release cycle) added models of the Xilinx efuse OTP fuses. Those have been implemented to use IF_PFLASH. (This is a somewhat unfortunate inconsistency I guess.) We also have a patchseries currently in the code review stage which uses IF_NONE: https://patchew.org/QEMU/20211101232346.1070813-1-wuhao...@google.com/20211101232346.1070813-6-wuhao...@google.com/ Here we are trying to provide a drive as backing store for some EEPROMs that hang off the i2c buses on some npcm7xx boards. Are these uses of IF_NONE OK, or should we be doing something else (using IF_PFLASH, defining a new IF_*, ???) thanks -- PMM