On: No more boot loader: Please use the kernel instead

[itvision]

To pass kernel parameters? How would you do that without a bootloader?

[account42 → itvision]

EFI can pass kernel parameters just fine, both in the default boot entries or when running the kernel from the EFI shell.

[itvision → account42]

What about doing that once without using e.g. efibootmgr?

[qhwudbebd → itvision]

You can just pass the custom command line as you run the kernel from UEFI shell prompt, e.g.

  fs0:linux.efi root=/dev/nvme0n1p1 initrd=ramfs.img loglevel=2

In my experience the nuisance part is creating and editing boot entries, especially if you try to set them up from the UEFI shell, so I tend to compile any initramfs and the default kernel command line into my kernel so I can drop it at /boot/efi/boot/bootx64.efi and minimise contact with the UEFI monstrosity.