[coreboot] How to give control to bootable USB

[Zoran Stojsavljevic]

Hello Dhanasekar,

This, I guess, is not (entirely) correct:

menuentry "ONIE: Embed ONIE" --class gnu-linux --class onie {
  echo    "ONIE: Embedding ONIE ..."
  onie_entry_start
  *linux   /vmlinuz* $ONIE_CMDLINE_LINUX boot_reason=embed
install_url=file:///lib/onie/onie-updater
 * initrd  /initrd.xz*
  onie_entry_end

You should have something similar to the following:

menuentry "ONIE: Embed ONIE" --class gnu-linux --class onie {
  echo    "ONIE: Embedding ONIE ..."
  onie_entry_start
  set root='hdX,msdosY' ## hdX is your USB stick, Y partition, U R booting
from, U should find going to GRUB2 monitor (with > prompt)
  set isofile=/<dir path>/ONIE-live-XYZ.iso ## or whatever your ONIE...
.iso image is named
  loopback loop $isofile
  *linux  (loop)/live/vmlinuz* $ONIE_CMDLINE_LINUX boot_reason=embed
install_url=file:///lib/onie/onie-updater
  *initrd (loop)/live/initrd.xz*
  onie_entry_end

Please, investigate a bit more using google.com! And let us know if you did
solve the problem (post the final grub2 menyentry which works for you).

Hope this helps to the whole community. ;-)

Zoran

On Thu, Jun 15, 2017 at 2:33 PM, Dhanasekar Jaganathan <
jdhanasekarmca at gmail.com> wrote:

> Hi Nico,
>
> Sorry, It is typo. I have tried with *configfile
> (usb0)/boot/grub/grub.cfg* only..
>
> with a new *boot/grub/grub.cfg*, I am getting following error,
>
> *error: file '/vmlinuz' not found.*
>
> *error: you need to load the kernel first. *
>
>
> FYR, I have attached  /boot/grub/grub.cfg(which is present in USB).
>
> Thanks,
> Dhanasekar
>
>
>
>
>
> On Thu, Jun 15, 2017 at 4:59 PM, Nico Huber <nico.h at gmx.de> wrote:
>
>> On 15.06.2017 07:31, Dhanasekar Jaganathan wrote:
>> > Hi Nico/Taiidan,
>> >
>> > After entering "*syslinux_configfile (*", when I press *TAB, I* I am not
>> > seeing anything (nothing is coming)..
>> >
>> > So, I have tried this command *"syslinux_configfile
>> > (usb0)/boot/grub/grub.cfg" *and got the error (Kernel without label).
>>
>> Read what Taiidan wrote carefully:
>>
>> >>>> also configfile (ahci0,msdos1)/grub2/grub.cfg to load a grub cfg
>>
>> For a grub.cfg, it's a plain *configfile* (not syslinux_configfile).
>>
>> Nico
>>
>> >
>> > My USB ONIE installers has following files,
>> >
>> > */initrd.xz*
>> >
>> > */vmlinuz*
>> >
>> > */boot/boot.cat <http://boot.cat>*
>> >
>> > */boot/eltorito.img*
>> >
>> > */boot/grub/gurb.cfg*
>> >
>> > */boot/i386-PC/ *.mod (Lot of .mod files)*
>> >
>> >
>> > Thanks,
>> > Dhanasekar
>> >
>> >
>> >
>> > On Thu, Jun 15, 2017 at 5:01 AM, Nico Huber <nico.h at gmx.de> wrote:
>> >
>> >> Hi Dhanasekar,
>> >>
>> >> On 14.06.2017 11:21, Dhanasekar Jaganathan wrote:
>> >>> Hi Taiidan,
>> >>>
>> >>> My USB ONIE installers don't have "isolinux/syslinux.cfg". It has
>> >>> "boot/grub/grub.cfg".
>> >>>
>> >>> When I try to run "syslinux_configfile (usb0)/boot/grub/grub.cfg" in
>> GRUB
>> >>> command line, I am getting "*kernel without label*" error.
>> >>>
>> >>> Please provide your commands
>> >>
>> >> Taiidan already told you the correct command name (33 lines below). You
>> >> might have missed it ;)
>> >>
>> >> Nico
>> >>
>> >>>
>> >>> Thanks,
>> >>> Dhanasekar
>> >>>
>> >>> On Wed, Jun 14, 2017 at 3:22 AM, Taiidan at gmx.com <Taiidan at gmx.com>
>> >> wrote:
>> >>>
>> >>>> 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.
>> >>>>
>> >>>
>> >>>
>> >>>
>> >>
>> >>
>> >
>>
>>
>
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>
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