[XEN] Clean up shutdown handling and ignore opt_noreboot if dom0

shuts down cleanly. The option is intended only to retain information
on the local console in case of a crash.

Based on a patch from Muli Ben-Yehuda <muli@il.ibm.com>

Signed-off-by: Keir Fraser <keir@xensource.com>

1 files changed, 66 insertions, 0 deletions

diff --git a/xen/common/shutdown.c b/xen/common/shutdown.c
new file mode 100644
index 0000000000..1baea16205
--- /dev/null
+++ b/xen/common/shutdown.c
@@ -0,0 +1,66 @@
+#include <xen/config.h>
+#include <xen/init.h>
+#include <xen/lib.h>
+#include <xen/sched.h>
+#include <xen/domain.h>
+#include <xen/delay.h>
+#include <xen/shutdown.h>
+#include <asm/debugger.h>
+#include <public/sched.h>
+
+/* opt_noreboot: If true, machine will need manual reset on error. */
+int opt_noreboot;
+boolean_param("noreboot", opt_noreboot);
+
+static void maybe_reboot(void)
+{
+    if ( opt_noreboot )
+    {
+        printk("'noreboot' set - not rebooting.\n");
+        machine_halt();
+    }
+    else
+    {
+        printk("rebooting machine in 5 seconds.\n");
+        watchdog_disable();
+        mdelay(5000);
+        machine_restart(NULL);
+    }
+}
+
+void dom0_shutdown(u8 reason)
+{
+    debugger_trap_immediate();
+
+    switch ( reason )
+    {
+    case SHUTDOWN_poweroff:
+    {
+        printk("Domain 0 halted: halting machine.\n");
+        machine_halt();
+        break; /* not reached */
+    }
+
+    case SHUTDOWN_crash:
+    {
+        printk("Domain 0 crashed: ");
+        maybe_reboot();
+        break; /* not reached */
+    }
+
+    case SHUTDOWN_reboot:
+    {
+        printk("Domain 0 shutdown: rebooting machine.\n");
+        machine_restart(NULL);
+        break; /* not reached */
+    }
+
+    default:
+    {
+        printk("Domain 0 shutdown (unknown reason %u): ", reason);
+        maybe_reboot();
+        break; /* not reached */
+    }
+    }
+}  
+