[PATCH v2 1/4] target/ppc: Fix lqarx to set cpu_reserve

[Nicholas Piggin]

lqarx does not set cpu_reserve, which causes stqcx. to never succeed.

Cc: qemu-stable@nongnu.org
Fixes: 94bf2658676 ("target/ppc: Use atomic load for LQ and LQARX")
Fixes: 57b38ffd0c6 ("target/ppc: Use tcg_gen_qemu_{ld,st}_i128 for LQARX, LQ, 
STQ")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
v2:
- Fix bugs vs memory access fault [Richard]

 target/ppc/translate.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index 3650d2985d..7a5bf1d820 100644
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -3881,6 +3881,7 @@ static void gen_lqarx(DisasContext *ctx)
     tcg_gen_qemu_ld_i128(t16, EA, ctx->mem_idx, DEF_MEMOP(MO_128 | MO_ALIGN));
     tcg_gen_extr_i128_i64(lo, hi, t16);
 
+    tcg_gen_mov_tl(cpu_reserve, EA);
     tcg_gen_st_tl(hi, cpu_env, offsetof(CPUPPCState, reserve_val));
     tcg_gen_st_tl(lo, cpu_env, offsetof(CPUPPCState, reserve_val2));
 }
-- 
2.40.1