sparc64: Make %pil level 15 a pseudo-NMI.

So that we can profile code even in a local_irq_disable() section,
only write 14 (instead of 15) into the %pil register to disable IRQs.

This allows PIL level 15 to serve as a pseudo NMI.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 2 deletions

diff --git a/arch/sparc64/kernel/hvtramp.S b/arch/sparc64/kernel/hvtramp.S
index 0236c43772fa..9365432904d6 100644
--- a/arch/sparc64/kernel/hvtramp.S
+++ b/arch/sparc64/kernel/hvtramp.S
@@ -1,6 +1,6 @@
 /* hvtramp.S: Hypervisor start-cpu trampoline code.
  *
- * Copyright (C) 2007 David S. Miller <davem@davemloft.net>
+ * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
  */
 
 #include <linux/init.h>
@@ -14,6 +14,7 @@
 #include <asm/ptrace.h>
 #include <asm/head.h>
 #include <asm/asi.h>
+#include <asm/pil.h>
 
         __CPUINIT
         .align          8
@@ -32,7 +33,7 @@
          */
 hv_cpu_startup:
         SET_GL(0)
-        wrpr            %g0, 15, %pil
+        wrpr            %g0, PIL_NORMAL_MAX, %pil
         wrpr            %g0, 0, %canrestore
         wrpr            %g0, 0, %otherwin
         wrpr            %g0, 6, %cansave