diff -Naur systemd-210/src/shared/virt.c systemd-210-mod/src/shared/virt.c
--- systemd-210/src/shared/virt.c	2014-02-24 15:38:03.909784909 +0100
+++ systemd-210-mod/src/shared/virt.c	2014-04-23 10:54:42.764134881 +0200
@@ -149,7 +149,7 @@
 
 /* Returns a short identifier for the various VM implementations */
 int detect_vm(const char **id) {
-        _cleanup_free_ char *hvtype = NULL, *cpuinfo_contents = NULL;
+        _cleanup_free_ char *hvtype = NULL, *domcap = NULL, *cpuinfo_contents = NULL;
         static thread_local int cached_found = -1;
         static thread_local const char *cached_id = NULL;
         const char *_id = NULL;
@@ -169,10 +169,23 @@
         r = read_one_line_file("/sys/hypervisor/type", &hvtype);
         if (r >= 0) {
                 if (streq(hvtype, "xen")) {
-                        _id = "xen";
-                        r = 1;
+                        r = read_one_line_file("/proc/xen/capabilities", &domcap);
+                        if (r >= 0) {
+                                if (strstr(domcap, "control_d")) {
+                                        r = 0;
+                                        _id = "xen-dom0";
+                                } else {
+                                        r = 1;
+                                        _id = "xen-domU";
+                                }
+                        } else {
+                               _id = "xen";
+                               r = 1;
+                        }
+
                         goto finish;
                 }
+
         } else if (r != -ENOENT)
                 return r;