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authorAlexander Graf <agraf@suse.de>2009-10-30 05:47:17 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-11-05 16:49:57 +1100
commit842f2fedcdc4f9ea8e6ac5b2222971c31666dd3e (patch)
tree6b54db59cd2a152846ee3fd397f597a48aceb55a /arch/powerpc/include/asm/exception-64s.h
parent513579e3a391a3874c478a8493080822069976e8 (diff)
downloadlinaro-lsk-842f2fedcdc4f9ea8e6ac5b2222971c31666dd3e.tar.gz
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>
Diffstat (limited to 'arch/powerpc/include/asm/exception-64s.h')
-rw-r--r--arch/powerpc/include/asm/exception-64s.h2
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 a98653b2623..57c40007199 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 */ \