[coreboot] graphic preallocated memory

[jief]

Hi,

I'm new to coreboot and this list, so please forgive and tell me if I'm 
doing something wrong.

I've successfully compile coreboot and flash it to a Lenovo x220. I 
tried seabios and tianocore as a payload and it works. So strange 
compile errors as I'm used to when I compile an opensource project. So, 
_bravo_.

What I need now is to be able to set the graphic preallocated memory. 
Usually in bios, it's "DVMT pre alloc" or something. I know it's 
possible on this platform because the unlocked bios can do it.

Could anyone point me in the direction ?

Thanks,

Jief

Mainboard : x220, i7-2640M@2.80GHz