[S390] Use diagnose 308 for system reset

[pandora-kernel.git] / arch / s390 / kernel / ipl.c

diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index a689070..04361d5 100644 (file)
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -45,11 +45,13 @@
  * - halt
  * - power off
  * - reipl
+ * - restart
  */
 #define ON_PANIC_STR           "on_panic"
 #define ON_HALT_STR            "on_halt"
 #define ON_POFF_STR            "on_poff"
 #define ON_REIPL_STR           "on_reboot"
+#define ON_RESTART_STR         "on_restart"
 
 struct shutdown_action;
 struct shutdown_trigger {
@@ -1544,17 +1546,20 @@ static char vmcmd_on_reboot[128];
 static char vmcmd_on_panic[128];
 static char vmcmd_on_halt[128];
 static char vmcmd_on_poff[128];
+static char vmcmd_on_restart[128];
 
 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
+DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
 
 static struct attribute *vmcmd_attrs[] = {
        &sys_vmcmd_on_reboot_attr.attr,
        &sys_vmcmd_on_panic_attr.attr,
        &sys_vmcmd_on_halt_attr.attr,
        &sys_vmcmd_on_poff_attr.attr,
+       &sys_vmcmd_on_restart_attr.attr,
        NULL,
 };
 
@@ -1576,6 +1581,8 @@ static void vmcmd_run(struct shutdown_trigger *trigger)
                cmd = vmcmd_on_halt;
        else if (strcmp(trigger->name, ON_POFF_STR) == 0)
                cmd = vmcmd_on_poff;
+       else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
+               cmd = vmcmd_on_restart;
        else
                return;
 
@@ -1707,6 +1714,34 @@ static void do_panic(void)
        stop_run(&on_panic_trigger);
 }
 
+/* on restart */
+
+static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
+       &reipl_action};
+
+static ssize_t on_restart_show(struct kobject *kobj,
+                              struct kobj_attribute *attr, char *page)
+{
+       return sprintf(page, "%s\n", on_restart_trigger.action->name);
+}
+
+static ssize_t on_restart_store(struct kobject *kobj,
+                               struct kobj_attribute *attr,
+                               const char *buf, size_t len)
+{
+       return set_trigger(buf, &on_restart_trigger, len);
+}
+
+static struct kobj_attribute on_restart_attr =
+       __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
+
+void do_restart(void)
+{
+       smp_send_stop();
+       on_restart_trigger.action->fn(&on_restart_trigger);
+       stop_run(&on_restart_trigger);
+}
+
 /* on halt */
 
 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
@@ -1783,7 +1818,9 @@ static void __init shutdown_triggers_init(void)
        if (sysfs_create_file(&shutdown_actions_kset->kobj,
                              &on_poff_attr.attr))
                goto fail;
-
+       if (sysfs_create_file(&shutdown_actions_kset->kobj,
+                             &on_restart_attr.attr))
+               goto fail;
        return;
 fail:
        panic("shutdown_triggers_init failed\n");
@@ -1959,6 +1996,12 @@ static void do_reset_calls(void)
 {
        struct reset_call *reset;
 
+#ifdef CONFIG_64BIT
+       if (diag308_set_works) {
+               diag308_reset();
+               return;
+       }
+#endif
        list_for_each_entry(reset, &rcall, list)
                reset->fn();
 }