Michael Niewöhner has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/46488 )
Change subject: mb/asrock/b85m_pro4/Kconfig: Default to 2 MiB CBFS ......................................................................
Patch Set 1:
(1 comment)
https://review.coreboot.org/c/coreboot/+/46488/1/src/mainboard/asrock/b85m_p... File src/mainboard/asrock/b85m_pro4/Kconfig:
https://review.coreboot.org/c/coreboot/+/46488/1/src/mainboard/asrock/b85m_p... PS1, Line 23: default 0x200000
Michael, I purposefully made this patch to avoid having to work around things locally.
The help text on this Kconfig says "... It defaults to span the whole ROM on all but Intel systems that use an Intel Firmware Descriptor". Clearly it can't span the whole ROM on Intel systems with IFD because IFD and ME need space. However, this is expected to span as much as possible.
-> set the full bios region size to provide a sensible default for the general user
If you have special requirements, then you always can either use a config file or have a patch locally adapting that value.