1 files changed, 20 insertions, 2 deletions

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index a90df6bf0940..8e3ca674d359 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -75,6 +75,8 @@ void smp_call_function_interrupt(void);
 
 int smt_enabled_at_boot = 1;
 
+static void (*crash_ipi_function_ptr)(struct pt_regs *) = NULL;
+
 #ifdef CONFIG_MPIC
 int __init smp_mpic_probe(void)
 {
@@ -123,11 +125,16 @@ void smp_message_recv(int msg, struct pt_regs *regs)
                 /* XXX Do we have to do this? */
                 set_need_resched();
                 break;
-#ifdef CONFIG_DEBUGGER
         case PPC_MSG_DEBUGGER_BREAK:
+                if (crash_ipi_function_ptr) {
+                        crash_ipi_function_ptr(regs);
+                        break;
+                }
+#ifdef CONFIG_DEBUGGER
                 debugger_ipi(regs);
                 break;
-#endif
+#endif /* CONFIG_DEBUGGER */
+                /* FALLTHROUGH */
         default:
                 printk("SMP %d: smp_message_recv(): unknown msg %d\n",
                        smp_processor_id(), msg);
@@ -147,6 +154,17 @@ void smp_send_debugger_break(int cpu)
 }
 #endif
 
+#ifdef CONFIG_KEXEC
+void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *))
+{
+        crash_ipi_function_ptr = crash_ipi_callback;
+        if (crash_ipi_callback) {
+                mb();
+                smp_ops->message_pass(MSG_ALL_BUT_SELF, PPC_MSG_DEBUGGER_BREAK);
+        }
+}
+#endif
+
 static void stop_this_cpu(void *dummy)
 {
         local_irq_disable();