[PULL 27/42] target/arm: Sink gen_mte_check1 into load/store_exclusive

[Peter Maydell]

From: Richard Henderson <richard.henderson@linaro.org>

No need to duplicate this check across multiple call sites.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230530191438.411344-9-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/tcg/translate-a64.c | 44 ++++++++++++++++------------------
 1 file changed, 21 insertions(+), 23 deletions(-)

diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 35eac7729b0..729947b11a4 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -2369,11 +2369,16 @@ static void disas_b_exc_sys(DisasContext *s, uint32_t 
insn)
  * races in multi-threaded linux-user and when MTTCG softmmu is
  * enabled.
  */
-static void gen_load_exclusive(DisasContext *s, int rt, int rt2,
-                               TCGv_i64 addr, int size, bool is_pair)
+static void gen_load_exclusive(DisasContext *s, int rt, int rt2, int rn,
+                               int size, bool is_pair)
 {
     int idx = get_mem_index(s);
     MemOp memop;
+    TCGv_i64 dirty_addr, clean_addr;
+
+    s->is_ldex = true;
+    dirty_addr = cpu_reg_sp(s, rn);
+    clean_addr = gen_mte_check1(s, dirty_addr, false, rn != 31, size);
 
     g_assert(size <= 3);
     if (is_pair) {
@@ -2381,7 +2386,7 @@ static void gen_load_exclusive(DisasContext *s, int rt, 
int rt2,
         if (size == 2) {
             /* The pair must be single-copy atomic for the doubleword.  */
             memop = finalize_memop(s, MO_64 | MO_ALIGN);
-            tcg_gen_qemu_ld_i64(cpu_exclusive_val, addr, idx, memop);
+            tcg_gen_qemu_ld_i64(cpu_exclusive_val, clean_addr, idx, memop);
             if (s->be_data == MO_LE) {
                 tcg_gen_extract_i64(cpu_reg(s, rt), cpu_exclusive_val, 0, 32);
                 tcg_gen_extract_i64(cpu_reg(s, rt2), cpu_exclusive_val, 32, 
32);
@@ -2400,7 +2405,7 @@ static void gen_load_exclusive(DisasContext *s, int rt, 
int rt2,
 
             memop = finalize_memop_atom(s, MO_128 | MO_ALIGN_16,
                                         MO_ATOM_IFALIGN_PAIR);
-            tcg_gen_qemu_ld_i128(t16, addr, idx, memop);
+            tcg_gen_qemu_ld_i128(t16, clean_addr, idx, memop);
 
             if (s->be_data == MO_LE) {
                 tcg_gen_extr_i128_i64(cpu_exclusive_val,
@@ -2414,14 +2419,14 @@ static void gen_load_exclusive(DisasContext *s, int rt, 
int rt2,
         }
     } else {
         memop = finalize_memop(s, size | MO_ALIGN);
-        tcg_gen_qemu_ld_i64(cpu_exclusive_val, addr, idx, memop);
+        tcg_gen_qemu_ld_i64(cpu_exclusive_val, clean_addr, idx, memop);
         tcg_gen_mov_i64(cpu_reg(s, rt), cpu_exclusive_val);
     }
-    tcg_gen_mov_i64(cpu_exclusive_addr, addr);
+    tcg_gen_mov_i64(cpu_exclusive_addr, clean_addr);
 }
 
 static void gen_store_exclusive(DisasContext *s, int rd, int rt, int rt2,
-                                TCGv_i64 addr, int size, int is_pair)
+                                int rn, int size, int is_pair)
 {
     /* if (env->exclusive_addr == addr && env->exclusive_val == [addr]
      *     && (!is_pair || env->exclusive_high == [addr + datasize])) {
@@ -2437,9 +2442,12 @@ static void gen_store_exclusive(DisasContext *s, int rd, 
int rt, int rt2,
      */
     TCGLabel *fail_label = gen_new_label();
     TCGLabel *done_label = gen_new_label();
-    TCGv_i64 tmp;
+    TCGv_i64 tmp, dirty_addr, clean_addr;
 
-    tcg_gen_brcond_i64(TCG_COND_NE, addr, cpu_exclusive_addr, fail_label);
+    dirty_addr = cpu_reg_sp(s, rn);
+    clean_addr = gen_mte_check1(s, dirty_addr, true, rn != 31, size);
+
+    tcg_gen_brcond_i64(TCG_COND_NE, clean_addr, cpu_exclusive_addr, 
fail_label);
 
     tmp = tcg_temp_new_i64();
     if (is_pair) {
@@ -2627,9 +2635,7 @@ static void disas_ldst_excl(DisasContext *s, uint32_t 
insn)
         if (is_lasr) {
             tcg_gen_mb(TCG_MO_ALL | TCG_BAR_STRL);
         }
-        clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn),
-                                    true, rn != 31, size);
-        gen_store_exclusive(s, rs, rt, rt2, clean_addr, size, false);
+        gen_store_exclusive(s, rs, rt, rt2, rn, size, false);
         return;
 
     case 0x4: /* LDXR */
@@ -2637,10 +2643,7 @@ static void disas_ldst_excl(DisasContext *s, uint32_t 
insn)
         if (rn == 31) {
             gen_check_sp_alignment(s);
         }
-        clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn),
-                                    false, rn != 31, size);
-        s->is_ldex = true;
-        gen_load_exclusive(s, rt, rt2, clean_addr, size, false);
+        gen_load_exclusive(s, rt, rt2, rn, size, false);
         if (is_lasr) {
             tcg_gen_mb(TCG_MO_ALL | TCG_BAR_LDAQ);
         }
@@ -2692,9 +2695,7 @@ static void disas_ldst_excl(DisasContext *s, uint32_t 
insn)
             if (is_lasr) {
                 tcg_gen_mb(TCG_MO_ALL | TCG_BAR_STRL);
             }
-            clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn),
-                                        true, rn != 31, size);
-            gen_store_exclusive(s, rs, rt, rt2, clean_addr, size, true);
+            gen_store_exclusive(s, rs, rt, rt2, rn, size, true);
             return;
         }
         if (rt2 == 31
@@ -2711,10 +2712,7 @@ static void disas_ldst_excl(DisasContext *s, uint32_t 
insn)
             if (rn == 31) {
                 gen_check_sp_alignment(s);
             }
-            clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn),
-                                        false, rn != 31, size);
-            s->is_ldex = true;
-            gen_load_exclusive(s, rt, rt2, clean_addr, size, true);
+            gen_load_exclusive(s, rt, rt2, rn, size, true);
             if (is_lasr) {
                 tcg_gen_mb(TCG_MO_ALL | TCG_BAR_LDAQ);
             }
-- 
2.34.1