[PATCH 1/2] Add support for extlinux.conf

[Sascha Hauer]

On Fri, Apr 24, 2026 at 04:53:59PM +0200, Ahmad Fatoum wrote:
> Hello,
> 
> On 4/24/26 10:46 AM, Alexander Shiyan wrote:
> >> On 4/16/26 3:45 PM, Alexander Shiyan wrote:
> >>> This adds support for the extlinux.conf configuration format, commonly
> >>> used by Syslinux and many Linux distributions. The configuration file
> >>> is typically located at /boot/extlinux/extlinux.conf or
> >>> /extlinux/extlinux.conf and defines boot entries with kernel, initrd,
> >>> device tree, and command line options.
> > ...
> >>> +static int extlinux_boot(struct bootentry *be, int verbose, int dryrun)
> >>> +{
> >>> +     struct extlinux_entry *e =
> >>> +             container_of(be, struct extlinux_entry, entry);
> >>> +     char *kernel_abs, *initrd_abs = NULL, *fdt_abs = NULL;
> >>> +     struct bootm_data data = {};
> >>> +     int ret;
> >>> +
> >>> +     bootm_data_init_defaults(&data);
> >>> +
> >>> +     data.dryrun = max_t(int, dryrun, data.dryrun);
> >>> +     data.verbose = max(verbose, data.verbose);
> >>> +     data.appendroot = true;
> >>
> >> Not sure this is a good idea because of potential of clashing with
> >> extlinux appended command line options.
> > 
> > globalvar_add_bool("extlinux.fix_root", NULL); ?
> 
> global.extlinux.strip_root to remove root=
> and bootm.appendroot to add barebox' own root?

We already have the latter, so nothing to do here.

Shouldn't we by default remove the root= option once data->appendroot is
set? Also in the bootspec case we do not want to end up with two root=
options.

Sascha

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