[PATCH v1 4/6] target/loongarch: Add REQUIRE_LAM macro to check atomic instructions

[Song Gao]

Signed-off-by: Song Gao <gaos...@loongson.cn>
---
 target/loongarch/cpu.h                         |  2 ++
 target/loongarch/insn_trans/trans_atomic.c.inc | 12 ++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h
index 13a4ab316a..0166ec3d7b 100644
--- a/target/loongarch/cpu.h
+++ b/target/loongarch/cpu.h
@@ -463,6 +463,7 @@ static inline void set_pc(CPULoongArchState *env, uint64_t 
value)
 #define HW_FLAGS_FP_SP      0x80
 #define HW_FLAGS_FP_DP      0x100
 #define HW_FLAGS_LSPW       0x200
+#define HW_FLAGS_LAM        0x400
 
 static inline void cpu_get_tb_cpu_state(CPULoongArchState *env, vaddr *pc,
                                         uint64_t *cs_base, uint32_t *flags)
@@ -477,6 +478,7 @@ static inline void cpu_get_tb_cpu_state(CPULoongArchState 
*env, vaddr *pc,
     *flags |= FIELD_EX32(env->cpucfg[2], CPUCFG2, FP_SP) * HW_FLAGS_FP_SP;
     *flags |= FIELD_EX32(env->cpucfg[2], CPUCFG2, FP_DP) * HW_FLAGS_FP_DP;
     *flags |= FIELD_EX32(env->cpucfg[2], CPUCFG2, LSPW) * HW_FLAGS_LSPW;
+    *flags |= FIELD_EX32(env->cpucfg[2], CPUCFG2, LAM) * HW_FLAGS_LAM;
 }
 
 void loongarch_cpu_list(void);
diff --git a/target/loongarch/insn_trans/trans_atomic.c.inc 
b/target/loongarch/insn_trans/trans_atomic.c.inc
index d90312729b..c65d0da758 100644
--- a/target/loongarch/insn_trans/trans_atomic.c.inc
+++ b/target/loongarch/insn_trans/trans_atomic.c.inc
@@ -3,12 +3,20 @@
  * Copyright (c) 2021 Loongson Technology Corporation Limited
  */
 
+#define REQUIRE_LAM do { \
+    if ((ctx->base.tb->flags & HW_FLAGS_LAM) == 0) { \
+        return false; \
+    } \
+} while (0)
+
 static bool gen_ll(DisasContext *ctx, arg_rr_i *a, MemOp mop)
 {
     TCGv dest = gpr_dst(ctx, a->rd, EXT_NONE);
     TCGv src1 = gpr_src(ctx, a->rj, EXT_NONE);
     TCGv t0 = make_address_i(ctx, src1, a->imm);
 
+    REQUIRE_LAM;
+
     tcg_gen_qemu_ld_i64(dest, t0, ctx->mem_idx, mop);
     tcg_gen_st_tl(t0, cpu_env, offsetof(CPULoongArchState, lladdr));
     tcg_gen_st_tl(dest, cpu_env, offsetof(CPULoongArchState, llval));
@@ -25,6 +33,8 @@ static bool gen_sc(DisasContext *ctx, arg_rr_i *a, MemOp mop)
     TCGv t0 = tcg_temp_new();
     TCGv val = tcg_temp_new();
 
+    REQUIRE_LAM;
+
     TCGLabel *l1 = gen_new_label();
     TCGLabel *done = gen_new_label();
 
@@ -53,6 +63,8 @@ static bool gen_am(DisasContext *ctx, arg_rrr *a,
     TCGv addr = gpr_src(ctx, a->rj, EXT_NONE);
     TCGv val = gpr_src(ctx, a->rk, EXT_NONE);
 
+    REQUIRE_LAM;
+
     if (a->rd != 0 && (a->rj == a->rd || a->rk == a->rd)) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "Warning: source register overlaps destination register"
-- 
2.39.1