Can I load early initrd?

[danfoster]

Hi!

I want to boot a modified ACPI table created by this tool: https://gitlab.com/marcaux/g14-2021-s3-dsdt

It creates an extra initrd that needs to be added in addition to the main initrd. In grub this would be done by setting GRUB_EARLY_INITRD_LINUX_CUSTOM="acpi_override".

Is it possible to achieve a similar boot process with zfsbootmenu?

[ahesford]

An early initramfs images is just prepended to the regular image. You'll have to build your ZFSBootMenu image as separate kernel and initramfs components (or download the release archive of separate components), then concatenate your early image and the ZBM image. If you want, you can stitch the ZBM kernel and your modified initramfs image into a UEFI bundles post hoc.