Migrating from setups where GbE size differs
Please check the size of the corresponding GbE file for your board. Dell typically uses 16KB GbE files, but some other coreboot distros will shrink this to 8KB; they may also then shrink the GbE region, and make the BIOS region at least 8KB bigger. Generally speaking, you will not find an image elsewhere with a smaller BIOS region than in RBoot, because RBoot makes sure to use the vendor’s default flash layout (default region sizes).
If your GbE region size differs from what’s used in RBoot, then you should avoid use of the ./mk inject command to inject MAC addresses; please run nvmutil manually, extracting it using the guidance there and then reinserting it.
The safest thing to do is to only flash the BIOS region, when switching from other coreboot distros:
flashprog -p PROGRAMMER --ifd -i bios -w rboot.romIf your region layout matches the vendor (Dell), then it should be safe to use the inject command for changing MAC addresses. It is only a minor convenience, as running nvmutil manually is quite easy. Refer to the guide.
More about this is covered in another guide.
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