[coreboot] [GRUB2][PAYLOAD] How to integrate grub.cfg

[megagolgoth]

Hi,


I successfully compile and flash Coreboot for a x220, with SeaBios as 
payload. I follow steps on these page :
"https://www.coreboot.org/Board:lenovo/x220"
"https://www.coreboot.org/Build_HOWTO"
"https://www.coreboot.org/VGA_support" (Done it 2 month ago with 
"bios_extract" , now it fails, I don't know why... But I got the 
extracted BLOB)


My goal is having Qubes installed with HDD completely encrypted,  ME 
(1,5MB version) disable ("https://github.com/corna/me_cleaner"), and 
Seabios available in case of need.

I have three step to do for that :

1. Using Grub2 as Coreboot payload, with Seabios as Grub2 payload.

2. Find a 1,5MB version of ME (from a Chromebook). Applying 
me_cleaner.py on coreboot.romn at the end.

3. Installing Qubes fully encrypted 
("https://github.com/QubesOS/qubes-issues/issues/2118").



My questions are :

1. I'm stuck because I didn't know how to integrate or make Grub2 use my 
grub.cfg. How to do?

2. Where can I find a Chromebook BIOS (or a 1,5MB ME) ?

3. Is someone did that? Any recommendation?



Jérémie.