Marty E. Plummer has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/35009 )
Change subject: default.fmd: reserve space for the ffs headers ......................................................................
Patch Set 6:
Patch Set 4:
Patch Set 4: Code-Review+2
Fair enough. Technically there's no reason even x86 systems couldn't use the format, but I consider the possibility so remote given x86's rather insular / idiosyncratic nature that I'm OK with the labels as-is.
It all looks as if it's primarily for Power, so maybe create a new default-power.fmd template and work from there?
I've considered this, but I'm thinking to hold off on that for now because as best as I can tell after the initial boot/flash of a coreboot.rom image one would then need to flash an image which is (more or less) entirely cbfs, with the bootblock 'outside' of it to be written the the p9 seeproms, so perhaps that would be the one to have the new default-ppc64.fmd file.