commit 5473eb1c07009956be5f4df65d51f8e24d8eb1de
author Mihai Caraman <mihai.caraman@freescale.com> Mon Aug 06 03:27:04 2012 +0000
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> Wed Sep 05 15:35:43 2012 +1000
tree 69ca3a9ea3aee261bc1db482d63ed82b34df5bdd
parent a1310757218e0757ee77d2ce05c43028430ed9dd

powerpc/booke64: Use GSRR registers in Guest Doorbell interrupts

Guest Doorbell interrupts use guest save and restore registers. Add a new
Guest Doorbell exception type to accommodate GSRR0/1 SPRs usage in exception
prolog and fix the exception handler.

Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/include/asm/exception-64e.h

diff --git a/arch/powerpc/include/asm/exception-64e.h b/arch/powerpc/include/asm/exception-64e.h
index ac13add..e73452f 100644
--- a/arch/powerpc/include/asm/exception-64e.h
+++ b/arch/powerpc/include/asm/exception-64e.h
@@ -37,6 +37,7 @@
  * critical data
  */
 
+#define PACA_EXGDBELL PACA_EXGEN
 
 /* We are out of SPRGs so we save some things in the PACA. The normal
  * exception frame is smaller than the CRIT or MC one though