[Qemu-devel] [PATCH 7/7] PPC64: Don't fault at lwsync

[Alexander Graf]

Right now we can throw a fault on lwsync, even though the fault is
actually caused by the instruction after lwsync.

I haven't found the magic that messed this up, but for now we can
just end the TB on lwsync, forcing the next command to issue faults
itself.

If anyone knows how to really fix this, please step forward and do
so. This only makes things work at all for me :-).

Signed-off-by: Alexander Graf <address@hidden>
---
 target-ppc/translate.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index b5de33b..c994ad7 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -3289,6 +3289,10 @@ GEN_HANDLER2(stdcx_, "stdcx.", 0x1F, 0x16, 0x06, 
0x00000000, PPC_64B)
 /* sync */
 GEN_HANDLER(sync, 0x1F, 0x16, 0x12, 0x039FF801, PPC_MEM_SYNC)
 {
+    // XXX without stopping here a page fault thinks it happens
+    //     in the sync, which is obviously wrong. Let's just keep
+    //     a sync as one TB as long as we don't do real SMP.
+    gen_stop_exception(ctx);
 }
 
 /* wait */
-- 
1.6.0.2