target/riscv: Don't wrongly override isa version

For some cpu, the isa version has already been set in cpu init function.
Thus only override the isa version when isa version is not set, or
users set different isa version explicitly by cpu parameters.

Signed-off-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Message-id: 20210811144612.68674-1-zhiwei_liu@c-sky.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 991a6bb7604f0a7b7395113f00c3223f560d41d1..1a2b03d579c9e3c8d4cfaf77394a6880cff703a7 100644 (file)
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -392,9 +392,7 @@ static void riscv_cpu_realize(DeviceState *dev, Error **errp)
     RISCVCPU *cpu = RISCV_CPU(dev);
     CPURISCVState *env = &cpu->env;
     RISCVCPUClass *mcc = RISCV_CPU_GET_CLASS(dev);
-    int priv_version = PRIV_VERSION_1_11_0;
-    int bext_version = BEXT_VERSION_0_93_0;
-    int vext_version = VEXT_VERSION_0_07_1;
+    int priv_version = 0;
     target_ulong target_misa = env->misa;
     Error *local_err = NULL;
 
@@ -417,9 +415,11 @@ static void riscv_cpu_realize(DeviceState *dev, Error **errp)
         }
     }
 
-    set_priv_version(env, priv_version);
-    set_bext_version(env, bext_version);
-    set_vext_version(env, vext_version);
+    if (priv_version) {
+        set_priv_version(env, priv_version);
+    } else if (!env->priv_ver) {
+        set_priv_version(env, PRIV_VERSION_1_11_0);
+    }
 
     if (cpu->cfg.mmu) {
         set_feature(env, RISCV_FEATURE_MMU);
@@ -497,6 +497,7 @@ static void riscv_cpu_realize(DeviceState *dev, Error **errp)
             target_misa |= RVH;
         }
         if (cpu->cfg.ext_b) {
+            int bext_version = BEXT_VERSION_0_93_0;
             target_misa |= RVB;
 
             if (cpu->cfg.bext_spec) {
@@ -515,6 +516,7 @@ static void riscv_cpu_realize(DeviceState *dev, Error **errp)
             set_bext_version(env, bext_version);
         }
         if (cpu->cfg.ext_v) {
+            int vext_version = VEXT_VERSION_0_07_1;
             target_misa |= RVV;
             if (!is_power_of_2(cpu->cfg.vlen)) {
                 error_setg(errp,