Custom image creation (Kernel, systemd-boot and devtree)

[SUB0PT1MAL]

Hello,

I've been fighting this for some days now and i exhausted all my resources but asking directly here.

I'm trying to run TalosLinux on a arm64 windows dev kit 2023 (volterra).

There is a kernel developed for it and i have compiled it with the necessary features, and following the official Talos doc i successfully created an image with it.

However, im struggling with adding the device tree file .dtb and modifying the systemd-boot loader.conf.

No matter what i try im unable to generate an image that contains the .dtb file on /root/.

And i'm going crazy with the loader.conf, becasue no matter if i search in the booteable images themselves or the repo, all the files i find only have a timeout inside, so where are the 3 entries available when booting the image coming from?

In summary i have to create an image with:

• custom kernel (done)
• sc8280xp-microsoft-blackrock.dtb file on /root/
• loader.conf entry with
  '''
  title Talos Custom Kernel
  linux /vmlinuz
  initrd /initramfs.xz
  options pd_ignore_unused clk_ignore_unused regulator_ignore_unused arm64.nopauth efi=noruntime fdt=/boot/sc8280xp-
  microsoft-blackrock.dtb
  '''

How feasible is this?

Is there some documentation that gets into more granular customization than Building Custom Talos Images?

Thanks in advance.

[smira]

Talos ships UKIs, which might include DTBs, but afaik we don't have any built-in support for it right now.

[SUB0PT1MAL]

Hi, I managed to make it load the dtb file at least according to the logs by booting from a manually formated EFI partition with all the files and a custom systemd-boot entry, now im fighting an error loading efivars.