[Qemu-devel] [PATCH] target/s390x: define TCG_GUEST_DEFAULT_MO for MTTCG

[Alex Bennée]

MTTCG should be enabled by default whenever the memory model allows
it. s390x was missing its definition of TCG_GUEST_DEFAULT_MO meaning
the user had to manually specify  --accel tcg,thread=multi.

Signed-off-by: Alex Bennée <address@hidden>
Cc: David Hildenbrand <address@hidden>
---
 target/s390x/cpu.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h
index 8c2320e882..47d2c2e9cf 100644
--- a/target/s390x/cpu.h
+++ b/target/s390x/cpu.h
@@ -35,6 +35,10 @@
 #define CPUArchState struct CPUS390XState
 
 #include "exec/cpu-defs.h"
+
+/* The z/Architecture has a strong memory model with some store-after-load 
re-ordering */
+#define TCG_GUEST_DEFAULT_MO      (TCG_MO_ALL & ~TCG_MO_ST_LD)
+
 #define TARGET_PAGE_BITS 12
 
 #define TARGET_PHYS_ADDR_SPACE_BITS 64
-- 
2.17.1