Xen: Update and allow forced time service

timesync.yml

@@ -118,23 +118,24 @@
 
 
 
-### Xen-Guests: https://wiki.xen.org/wiki/Xen_FAQ_DomU#How_can_i_synchronize_a_dom0_clock.3F
+### Xen-Guests:
+# Old: https://wiki.xen.org/wiki/Xen_FAQ_DomU#How_can_i_synchronize_a_dom0_clock.3F
+# New: /sys/devices/system/clocksource/clocksource0/current_clocksource → "xen"
 - hosts:
   - virtguest_xen
 
   gather_facts: no
 
   pre_tasks:
-    - shell: 'cat /proc/sys/xen/independent_wallclock || echo 1'
+    - shell: 'cat /proc/sys/xen/independent_wallclock || cat /sys/devices/system/clocksource/clocksource0/current_clocksource'
       changed_when: False
-      register: independent_wallclock
-
-    - assert:
-        that:
-        - independent_wallclock.stdout == "1"
+      register: timesync_clocksource
 
   roles:
-    - timesync-enabled
+    - role: timesync-disabled
+      when: timesync_clocksource.stdout in ["1", "xen"] and not timesync_force
+    - role: timesync-enabled
+      when: timesync_clocksource.stdout not in ["1", "xen"] or timesync_force