[PATCH v1 6/6] target/loongarch: Add REQUIRE_IOCSR macro to check IOCSR instructions

[Song Gao]

Signed-off-by: Song Gao <gaos...@loongson.cn>
---
 target/loongarch/cpu.h                             | 2 ++
 target/loongarch/insn_trans/trans_privileged.c.inc | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h
index 19d2a28a47..69a3ab16ee 100644
--- a/target/loongarch/cpu.h
+++ b/target/loongarch/cpu.h
@@ -465,6 +465,7 @@ static inline void set_pc(CPULoongArchState *env, uint64_t 
value)
 #define HW_FLAGS_LSPW       0x200
 #define HW_FLAGS_LAM        0x400
 #define HW_FLAGS_LSX        0x800
+#define HW_FLAGS_IOCSR      0x2000
 
 static inline void cpu_get_tb_cpu_state(CPULoongArchState *env, vaddr *pc,
                                         uint64_t *cs_base, uint32_t *flags)
@@ -481,6 +482,7 @@ static inline void cpu_get_tb_cpu_state(CPULoongArchState 
*env, vaddr *pc,
     *flags |= FIELD_EX32(env->cpucfg[2], CPUCFG2, LSPW) * HW_FLAGS_LSPW;
     *flags |= FIELD_EX32(env->cpucfg[2], CPUCFG2, LAM) * HW_FLAGS_LAM;
     *flags |= FIELD_EX32(env->cpucfg[2], CPUCFG2, LSX) * HW_FLAGS_LSX;
+    *flags |= FIELD_EX32(env->cpucfg[1], CPUCFG1, IOCSR) * HW_FLAGS_IOCSR;
 }
 
 void loongarch_cpu_list(void);
diff --git a/target/loongarch/insn_trans/trans_privileged.c.inc 
b/target/loongarch/insn_trans/trans_privileged.c.inc
index 210678dbb8..78badf4bbb 100644
--- a/target/loongarch/insn_trans/trans_privileged.c.inc
+++ b/target/loongarch/insn_trans/trans_privileged.c.inc
@@ -286,12 +286,19 @@ static bool trans_csrxchg(DisasContext *ctx, arg_csrxchg 
*a)
     return true;
 }
 
+#define REQUIRE_IOCSR do { \
+    if ((ctx->base.tb->flags & HW_FLAGS_IOCSR) == 0) { \
+        return false; \
+    } \
+} while (0)
+
 static bool gen_iocsrrd(DisasContext *ctx, arg_rr *a,
                         void (*func)(TCGv, TCGv_ptr, TCGv))
 {
     TCGv dest = gpr_dst(ctx, a->rd, EXT_NONE);
     TCGv src1 = gpr_src(ctx, a->rj, EXT_NONE);
 
+    REQUIRE_IOCSR;
     if (check_plv(ctx)) {
         return false;
     }
@@ -305,6 +312,7 @@ static bool gen_iocsrwr(DisasContext *ctx, arg_rr *a,
     TCGv val = gpr_src(ctx, a->rd, EXT_NONE);
     TCGv addr = gpr_src(ctx, a->rj, EXT_NONE);
 
+    REQUIRE_IOCSR;
     if (check_plv(ctx)) {
         return false;
     }
-- 
2.39.1