kexec crash image when dom0 crashes

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Tested-by: Daniel Kiper <daniel.kiper@oracle.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Don Slutz <dslutz@verizon.com>
Tested-by: Don Slutz <dslutz@verizon.com>
Acked-by: Keir Fraser <keir@xen.org>

xen/common/kexec.c

@@ -305,6 +305,8 @@ void kexec_crash(void)
     if ( !test_bit(KEXEC_IMAGE_CRASH_BASE + pos, &kexec_flags) )
         return;
 
+    printk("Executing crash image\n");
+
     kexecing = TRUE;
 
     kexec_common_shutdown();

xen/common/shutdown.c

@@ -47,6 +47,9 @@ void dom0_shutdown(u8 reason)
     {
         debugger_trap_immediate();
         printk("Domain 0 crashed: ");
+#ifdef CONFIG_KEXEC
+        kexec_crash();
+#endif
         maybe_reboot();
         break; /* not reached */
     }