archlinux: add support for rpi5 and arm (#486)

Signed-off-by: Gilles Habran <gilleshabran@protonmail.com>

roles/raspberrypi/tasks/prereq/Archlinux.yml

@@ -1,13 +1,40 @@
 ---
-- name: Enable cgroup via boot commandline if not already enabled
+- name: Check for boot configuration files
+  ansible.builtin.stat:
+    path: "{{ item }}"
+  loop:
+    - /boot/boot.txt
+    - /boot/cmdline.txt
+  register: boot_files
+
+- name: Set boot_file fact
+  ansible.builtin.set_fact:
+    rpi_boot_file: "{{ (boot_files.results | selectattr('stat.exists') | map(attribute='item') | list | first) | default('') }}"
+
+- name: Enable cgroup via boot commandline (boot.txt)
   ansible.builtin.replace:
     path: /boot/boot.txt
     regexp: '^(setenv bootargs console=ttyS1,115200 console=tty0 root=PARTUUID=\${uuid} rw rootwait smsc95xx.macaddr="\${usbethaddr}"(?!.*\b{{ cgroup_item }}\b).*)$'
     replace: '\1 {{ cgroup_item }}'
-  loop:
+  with_items:
     - "cgroup_enable=cpuset"
     - "cgroup_memory=1"
     - "cgroup_enable=memory"
   loop_control:
     loop_var: cgroup_item
+  when: rpi_boot_file == '/boot/boot.txt'
   notify: Regenerate bootloader image
+
+- name: Enable cgroup via boot commandline (cmdline.txt)
+  ansible.builtin.replace:
+    path: /boot/cmdline.txt
+    regexp: '^([\w](?!.*\b{{ cgroup_item }}\b).*)$'
+    replace: '\1 {{ cgroup_item }}'
+  with_items:
+    - "cgroup_enable=cpuset"
+    - "cgroup_memory=1"
+    - "cgroup_enable=memory"
+  loop_control:
+    loop_var: cgroup_item
+  when: rpi_boot_file == '/boot/cmdline.txt'
+  notify: Reboot Pi