Make head_64.S aware of KVM real mode code

We need to run some KVM trampoline code in real mode. Unfortunately, real mode
only covers 8MB on Cell so we need to squeeze ourselves as low as possible.

Also, we need to trap interrupts to get us back from guest state to host state
without telling Linux about it.

This patch adds interrupt traps and includes the KVM code that requires real
mode in the real mode parts of Linux.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h
index a98653b26231..57c400071995 100644
--- a/arch/powerpc/include/asm/exception-64s.h
+++ b/arch/powerpc/include/asm/exception-64s.h
@@ -147,6 +147,7 @@
         .globl label##_pSeries;                         \
 label##_pSeries:                                        \
         HMT_MEDIUM;                                     \
+        DO_KVM  n;                                      \
         mtspr   SPRN_SPRG_SCRATCH0,r13;         /* save r13 */  \
         EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common)
 
@@ -170,6 +171,7 @@ label##_pSeries:					\
         .globl label##_pSeries;                                         \
 label##_pSeries:                                                        \
         HMT_MEDIUM;                                                     \
+        DO_KVM  n;                                                      \
         mtspr   SPRN_SPRG_SCRATCH0,r13; /* save r13 */                  \
         mfspr   r13,SPRN_SPRG_PACA;     /* get paca address into r13 */ \
         std     r9,PACA_EXGEN+EX_R9(r13);       /* save r9, r10 */      \