On 06/13/2017 10:22 AM, Dhanasekar Jaganathan wrote:

Hi All,

I am trying to install ONIE from USB which has ONIE installer. Actually, I
am using GRUB2 as a payload.  If Coreboot display list of bootable device,I
can select USB which will install a OS in the hard disk.  As I understood
that Coreboot won't display list of available bootable device (not like
vendor bios).I don't know how to give control to bootable USB or boot a
bootable USB by coreboot. Can you please help me on this?.


Thanks,
Dhanasekar

Assuming you are booting a standard linux distro iso:
syslinux_configfile (*TAB* to see what is available

then simply for instance syslinux_configfile (usb0,msdos1)/isolinux/syslinux.cfg (or w/e)

also configfile (ahci0,msdos1)/grub2/grub.cfg to load a grub cfg

Ideally you would add a grub cfg to the coreboot image that does something like load a config file from a specified local disk so that it is easy to update (ie: no re-flashing) instructions for that are on the wiki.

SeaBIOS would provide the classic AMI style F12 selection menu, but I don't like it due to how many times I have accidentally enabled option rom execution by forgetting to include the configuration file.