On Tue, Dec 16, 2025 at 9:39 AM Gerd Hoffmann <[email protected]> wrote:
>
> On Tue, Dec 16, 2025 at 08:13:04AM -0500, Neal Gompa wrote:
> > On Tue, Dec 16, 2025 at 5:54 AM Gerd Hoffmann <[email protected]> wrote:
> > >
> > >   Hi,
> > >
> > > > * Stubble is a fork of systemd-stub there is no reason why the same 
> > > > should
> > > > not be possible with systemd-stub. Testing has shown that ATM using
> > > > systemd-stub this way does not work, why this does not work has not been
> > > > investigated yet. For now we are going with Stubble.
> > >
> > > /me looks a bit surprised that you don't even investigate why
> > > systemd-stub does not work before going to package the stubble fork ...
> >
> > Well, does sd-stub have the DTB selection stuff for a series of
> > embedded DTBs? I thought that's kind of the point of stubble.
>
> The stub man-page describes '.dtbauto' sections which have exactly this
> purpose ...
>
> > > > 1. For now vmlinuz will grow by about 3 MB which is not a problem, but 
> > > > as
> > > > more DTBs get added it will grow more. There are several ideas to reduce
> > > > the growth but those are not implemented yet.
> > >
> > > Can't the DTBs be shipped as UKI add-ons?
> >
> > That's a good question, but I wonder if that would be too late? I was
> > told we can't do it in initramfs, which makes it sound like it
> > absolutely needs to be in vmlinux.
>
> Add-ons are loaded by the systemd efi stub.  They can carry data which
> is later user by the initrd (sysext + confext), but it is also possible
> to add things to the UKI.  I think having add-ons with '.dtbauto'
> sections and have systemd-stub use them when booting the kernel should
> work.
>

Can the addons live outside of the ESP space? I'd rather have them in
/boot than in the ESP.




--
真実はいつも一つ!/ Always, there's only one truth!
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