ia64/xen: preliminary support for save/restore.

preliminary support for save/restore.
Although Save/restore isn't fully working yet, this patch is necessary
to compile.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/arch/ia64/xen/time.c b/arch/ia64/xen/time.c
index ec168ec754b2..d15a94c330fb 100644
--- a/arch/ia64/xen/time.c
+++ b/arch/ia64/xen/time.c
@@ -26,6 +26,8 @@
 #include <linux/irq.h>
 #include <linux/clocksource.h>
 
+#include <asm/timex.h>
+
 #include <asm/xen/hypervisor.h>
 
 #include <xen/interface/vcpu.h>
@@ -178,3 +180,34 @@ struct pv_time_ops xen_time_ops __initdata = {
         .do_steal_accounting            = xen_do_steal_accounting,
         .clocksource_resume             = xen_itc_jitter_data_reset,
 };
+
+/* Called after suspend, to resume time.  */
+static void xen_local_tick_resume(void)
+{
+        /* Just trigger a tick.  */
+        ia64_cpu_local_tick();
+        touch_softlockup_watchdog();
+}
+
+void
+xen_timer_resume(void)
+{
+        unsigned int cpu;
+
+        xen_local_tick_resume();
+
+        for_each_online_cpu(cpu)
+                xen_init_missing_ticks_accounting(cpu);
+}
+
+static void ia64_cpu_local_tick_fn(void *unused)
+{
+        xen_local_tick_resume();
+        xen_init_missing_ticks_accounting(smp_processor_id());
+}
+
+void
+xen_timer_resume_on_aps(void)
+{
+        smp_call_function(&ia64_cpu_local_tick_fn, NULL, 1);
+}