1 files changed, 27 insertions, 0 deletions

diff --git a/arch/i386/mach-default/setup.c b/arch/i386/mach-default/setup.c
index 0aa08eaa8932..e5a1a83d09ef 100644
--- a/arch/i386/mach-default/setup.c
+++ b/arch/i386/mach-default/setup.c
@@ -10,6 +10,14 @@
 #include <asm/acpi.h>
 #include <asm/arch_hooks.h>
 
+#ifdef CONFIG_HOTPLUG_CPU
+#define DEFAULT_SEND_IPI        (1)
+#else
+#define DEFAULT_SEND_IPI        (0)
+#endif
+
+int no_broadcast=DEFAULT_SEND_IPI;
+
 /**
  * pre_intr_init_hook - initialisation prior to setting up interrupt vectors
  *
@@ -104,3 +112,22 @@ void __init mca_nmi_hook(void)
         printk("NMI generated from unknown source!\n");
 }
 #endif
+
+static __init int no_ipi_broadcast(char *str)
+{
+        get_option(&str, &no_broadcast);
+        printk ("Using %s mode\n", no_broadcast ? "No IPI Broadcast" :
+                                                                                        "IPI Broadcast");
+        return 1;
+}
+
+__setup("no_ipi_broadcast", no_ipi_broadcast);
+
+static int __init print_ipi_mode(void)
+{
+        printk ("Using IPI %s mode\n", no_broadcast ? "No-Shortcut" :
+                                                                                        "Shortcut");
+        return 0;
+}
+
+late_initcall(print_ipi_mode);