lsm kernel parameter gets ignored

[cloudlena]

I would like to enable AppArmor on my machine, and therefore I am following https://wiki.archlinux.org/title/AppArmor.

Since I'm using EFISTUB, I ran the following command to add the required lsm kernel parameter:

# efibootmgr --disk /dev/nvme0n1 --part 1 --create --label "Arch Linux" --loader /vmlinuz-linux --unicode 'cryptdevice=UUID=xxx:root root=/dev/mapper/root rw initrd=\intel-ucode.img initrd=\initramfs-linux.img lsm=landlock,lockdown,yama,integrity,apparmor,bpf'

where xxx is the UUID of the disk. I then changed the boot order to boot that newly created entry. This seems to work because, when I run efibootmgr --unicode after a restart, it shows the newly created entry under BootCurrent.

However, when I run cat /sys/kernel/security/lsm, it still shows capability,landlock,lockdown,yama,bpf so it seems to have ignored the newly added lsm kernel parameter.

Am I missing something here, or why isn't it using the new value including apparmor for lsm? Is it possible, that certain kernel parameters are not supported?