blspec

[Alexander Shiyan]

Hello Ahmad.

Is it possible to implement a similar provider that parses extlinux.conf
(i.e. finds DEFAULT, reads the corresponding LABEL section, extracts
KERNEL, INITRD, APPEND) and creates boot records based on it?

Thanks!

пн, 13 апр. 2026 г. в 17:01, Ahmad Fatoum <a.fatoum at pengutronix.de>:
>
> Hello Alexander,
>
> On 4/10/26 4:02 PM, Alexander Shiyan wrote:
> > Hello All.
> >
> > Can anyone explain how to use the built-in blspec support?
> > I would like to try setting up booting via exlinux.conf...
>
> exlinux.conf and bootloader spec are different formats.
>
> Here's a bootloader spec example:
>
>   $ cat /loader/entries/imx8mp-evk.conf
>   title           PTXdist - Pengutronix-DistroKit imx8mp-evk
>   version         6.18
>   options         rootwait
>   linux           /boot/Image
>   devicetree      /boot/imx8mp-evk.dtb
>   linux-appendroot        true
>
>
> You can have multiple files under /loader/entries and barebox will
> iterate over them, extract the compatible of the referenced devicetree,
> compare it against its own and then decide what to boot.
>
> The linux-appendroot key is barebox-specific and means barebox should
> fixup root= according to the device it found the bootloader spec file
> on. This is useful for the case where the bootloader spec files are
> directly in the rootfs and not in a separate partition.
>
> Cheers,
> Ahmad
>
>
>
> >
> > Thanks!
> >
> >
>
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