Merge branch 'upstream/xen-settime' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6.git] / arch / x86 / xen / time.c
index 163b467..0296a95 100644 (file)
@@ -201,8 +201,22 @@ static unsigned long xen_get_wallclock(void)
 
 static int xen_set_wallclock(unsigned long now)
 {
+       struct xen_platform_op op;
+       int rc;
+
        /* do nothing for domU */
-       return -1;
+       if (!xen_initial_domain())
+               return -1;
+
+       op.cmd = XENPF_settime;
+       op.u.settime.secs = now;
+       op.u.settime.nsecs = 0;
+       op.u.settime.system_time = xen_clocksource_read();
+
+       rc = HYPERVISOR_dom0_op(&op);
+       WARN(rc != 0, "XENPF_settime failed: now=%ld\n", now);
+
+       return rc;
 }
 
 static struct clocksource xen_clocksource __read_mostly = {