Hello, so I have been trying to install gentoo with systemd and it's not going well. This is my other post I made which has exactly what you want to know https://forums.gentoo.org/viewtopic-t-1123666.html
Honestly, it feels off for me. I think that I need u-boot to boot the initramfs, I don't know honestly.

Try viewforum.php?f=54

As it is apparently board policy to disallow any criticism of anything, as it appears to criticise something is to criticise all the users of that something, I will no longer be commenting in threads which are not directly relevant to my uses of the Pi.

It doesn't help as much as I wanted it too. Here's the main problem: I want to build systemd raspberrypi4 gentoo and ONLY for raspberrypi4. Not the other pi's. I have my root partition in lvm, and I was told that you have to have "dolvm" in the cmdline.txt. I have been viewing ubuntu mate aarch64 which is as right now an experimental installation. What it has is grub, u-boot.bin, u-boot_pi_4.bin, and initramfs. When I tried building the initramfs kernel as I have the boot partition formatted as fat32 with the lba, boot flag on. I run into errors that operation is not permitted even though I am ROOT. I tried changing the ownership by using chown /boot -R and that didnt work. Apparently, because it is a fat32, i am screwed. So, I was able to build the initramfs with dracut and it says that /dev/gentoo/root, /dev/gentoo/swap, and /dev/gentoo/var/log does not exist even when I mentioned earlier it is already installed I built the dtbs files by following this link https://wiki.gentoo.org/wiki/Raspberry_ ... ompilation moved the dtbs files to /boot, moved the overlays into the empty dir, moved the 32bit out of the way, and changed my config.txt to boot it. I have all my progress mentioned in that link I provided above. Yes, it is lazy for me to do that, as I was on my phone.
The kernel still bloody hangs.. I am going to try to build my own initramfs and see how that goes.