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[Qemu-devel] [PULL v2 68/70] target/s390x: check alignment in CDSG in th


From: Richard Henderson
Subject: [Qemu-devel] [PULL v2 68/70] target/s390x: check alignment in CDSG in the !CONFIG_ATOMIC128 case
Date: Tue, 6 Jun 2017 17:31:17 -0700

From: Aurelien Jarno <address@hidden>

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 <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
---
 target/s390x/mem_helper.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c
index a8988e0..80caab9 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);
 
-- 
2.9.4




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