On Thu, Jan 6, 2022 at 11:46 AM Fabio Valentini decathorpe@gmail.com wrote:
I seem to remember that /boot/efi/loader and /boot/efi/$machine-id folders were used for gummiboot / early systemd-boot file snippets. Back in those days, bootloader config file snippets for new kernels were only created for those bootloaders if those directories existed, IIRC.
Yes. It's a bit of a saga.
Fedora takes an al la carte approach to the Boot Loader Spec, where we effectively have two $BOOT volumes. One for the bootloader and a forwarding configuration file, a second for the rest of the configuration files plus kernel and initramfs.
Boot Loader Spec defines only one $BOOT where everything goes: bootloader, configs, kernel, initramfs.
I suppose the main rationale for the approach we took is the path of least change. The main change was getting away from constant grub.cfg modification, and using drop-in configuration files that ostensibly any bootloader could support. But we didn't commit to the bigger changes: discovery by partition type code/UUID instead of filesystem UUID baked into a configuration file which has to be searched for by the bootloader; and the idea of putting kernel/initramfs on FAT was never popular.
Possibly a big step toward better BLS compliance that also wouldn't be too controversial: * use XBOOTLDR partition type code for our ext4 /boot, and discover it by that type code rather than than by fs UUID * mount XBOOTLDR at /boot * mount EFI System at /efi
But now I'm in the weeds, and it should be a different thread to discuss doing something different.