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[v4,3/3] target/s390x: check alignment in CDSG in the !CONFIG_ATOMIC128 case

Message ID 20170604202034.16615-4-aurelien@aurel32.net
State New
Headers show

Commit Message

Aurelien Jarno June 4, 2017, 8:20 p.m. UTC 
The CDSG instruction requires a 16-byte alignement, as expressed in
the MO_ALIGN_16 passed to helper_atomic_cmpxchgo_be_mmu. In the non
parallel case, use check_alignment to enforce this.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---
 target/s390x/mem_helper.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c
index a8988e0293..80caab9c9d 100644
--- a/target/s390x/mem_helper.c
+++ b/target/s390x/mem_helper.c
@@ -1262,6 +1262,8 @@  void HELPER(cdsg)(CPUS390XState *env, uint64_t addr,
     } else {
         uint64_t oldh, oldl;
 
+        check_alignment(env, addr, 16, ra);
+
         oldh = cpu_ldq_data_ra(env, addr + 0, ra);
         oldl = cpu_ldq_data_ra(env, addr + 8, ra);