Re: [OE-core] [PATCH v3 01/11] systemd: enable efi support by default

Alexander Kanavin
2025-04-10T17:45:05Z

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But none of the last few messages answer my question. Can I restate it?

Is there a physical board that can boot from ESP formatted to something
else than FAT?

Alex

On Thu 10. Apr 2025 at 18.51, Ilias Apalodimas via lists.openembedded.org
<ilias.apalodimas=linaro.org@lists.openembedded.org> wrote:

> Apologies for the noise, I forgot to add Adrian in CC
>
> On Thu, 10 Apr 2025 at 14:45, Ilias Apalodimas
> <ilias.apalodimas@linaro.org> wrote:
> >
> > Hi Adrian
> >
> > On Thu, 10 Apr 2025 at 14:21, Adrian Freihofer <mikko.rapeli@linaro.org>
> wrote:
> > >
> > > Hi Mikko
> > >
> > > On Fri, 2025-04-04 at 19:29 +0300, Mikko Rapeli via
> > > lists.openembedded.org wrote:
> > > > For example genericarm64 enables "efi" in MACHINE_FEATURES
> > > > and in u-boot. Boot without "efi" in systemd works with
> > > > EFI protocols but for example efivars is not mounted at
> > > > all so various checks fail in userspace. Fix these by
> > > > enabling "efi" support by default to avoid making
> > > > it machine specific. Fixes efivars mount to
> > > > /sys/firmware/efi/efivars etc.
> > >
> > > My point is that many OE/Yocto-based embedded products rely on a fully
> > > redundant and power fail-safe firmware update and boot implementation.
> > > So far I have not understood how this could be implemented in a
> > > similarly robust way based on EFI as we have now without EFI-based
> > > boot-up.
> >
> > As far as the firmware updates are concerned there's [0], which is
> > also implemented in U-Boot.
> > But even in that case, I am not sure I understand your concerns. What
> > prevents you from having the existing mechanisms for firmware updates
> > on a system that boots with EFI?
> >
> > > I would therefore like to see the EFI implementation remain
> > > opt-in until it covers at least the most important use cases for robust
> > > embedded systems. What I primarily miss with EFI is a reference
> > > implementation for an A/B update system without having to rely on a FAT
> > > partition without journaling. Please correct me if I'm missing
> > > something!
> >
> > Where does the FAT partition requirement come from?
> >
> > >
> > > Would it make sense to declare poky as an EFI ready reference
> > > distribution by enabling the efi DISTRO_FEATURE there, rather than
> > > starting with making recipes enabling efi unconditionally?
> > >
> > > Could something like this in poky.conf work?
> > > DISTRO_FEATURES:append:aarch64 = " efi"
> > > DISTRO_FEATURES:append:riscv64 = " efi"
> > > DISTRO_FEATURES:append:x86-64 = " efi"
> >
> > [0]
> https://github.com/ARM-software/edge-iot-arch-guide/blob/main/source/FWU/MBFW/chapter1-introduction.md
> >
> > Thanks
> > /Ilias
> > >
> > > Thank you and regards,
> > > Adrian
> > >
> > > >
> > > > Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org>
> > > > ---
> > > > meta/recipes-core/systemd/systemd_257.4.bb | 3 ++-
> > > > 1 file changed, 2 insertions(+), 1 deletion(-)
> > > >
> > > > diff --git a/meta/recipes-core/systemd/systemd_257.4.bb
> > > > b/meta/recipes-core/systemd/systemd_257.4.bb
> > > > index 64fb8fe69a..06e5621398 100644
> > > > --- a/meta/recipes-core/systemd/systemd_257.4.bb
> > > > +++ b/meta/recipes-core/systemd/systemd_257.4.bb
> > > > @@ -68,13 +68,14 @@ PAM_PLUGINS = " \
> > > > "
> > > >
> > > > PACKAGECONFIG ??= " \
> > > > - ${@bb.utils.filter('DISTRO_FEATURES', 'acl audit apparmor efi
> > > > ldconfig pam pni-names selinux smack polkit seccomp', d)} \
> > > > + ${@bb.utils.filter('DISTRO_FEATURES', 'acl audit apparmor
> > > > ldconfig pam pni-names selinux smack polkit seccomp', d)} \
> > > > ${@bb.utils.contains('DISTRO_FEATURES', 'minidebuginfo',
> > > > 'coredump elfutils', '', d)} \
> > > > ${@bb.utils.contains('DISTRO_FEATURES', 'wifi', 'rfkill', '',
> > > > d)} \
> > > > ${@bb.utils.contains('DISTRO_FEATURES', 'x11', 'xkbcommon', '',
> > > > d)} \
> > > > ${@bb.utils.contains('DISTRO_FEATURES', 'sysvinit', 'sysvinit',
> > > > 'link-udev-shared', d)} \
> > > > backlight \
> > > > binfmt \
> > > > + efi \
> > > > gshadow \
> > > > hibernate \
> > > > hostnamed \
> > > >
> > > >
> > > >
> > >
>
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