target/riscv: Introduce mmuidx_priv

Use the priv level encoded into the mmu_idx, rather than
starting from env->priv.  We have already checked MPRV+MPP
in riscv_cpu_mmu_index -- no need to repeat that.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Weiwei Li <liweiwei@iscas.ac.cn>
Tested-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Message-Id: <20230325105429.1142530-14-richard.henderson@linaro.org>
Message-Id: <20230412114333.118895-14-richard.henderson@linaro.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

target/riscv/cpu_helper.c

@@ -758,7 +758,7 @@ static int get_physical_address(CPURISCVState *env, hwaddr *physical,
      */
     MemTxResult res;
     MemTxAttrs attrs = MEMTXATTRS_UNSPECIFIED;
-    int mode = env->priv;
+    int mode = mmuidx_priv(mmu_idx);
     bool use_background = false;
     hwaddr ppn;
     int napot_bits = 0;
@@ -781,10 +781,6 @@ static int get_physical_address(CPURISCVState *env, hwaddr *physical,
      */
     if (riscv_cpu_two_stage_lookup(mmu_idx)) {
         mode = get_field(env->hstatus, HSTATUS_SPVP);
-    } else if (mode == PRV_M && access_type != MMU_INST_FETCH) {
-        if (get_field(env->mstatus, MSTATUS_MPRV)) {
-            mode = get_field(env->mstatus, MSTATUS_MPP);
-        }
     }
 
     if (first_stage == false) {

target/riscv/internals.h

@@ -37,6 +37,15 @@
 #define MMUIdx_M            3
 #define MMU_2STAGE_BIT      (1 << 2)
 
+static inline int mmuidx_priv(int mmu_idx)
+{
+    int ret = mmu_idx & 3;
+    if (ret == MMUIdx_S_SUM) {
+        ret = PRV_S;
+    }
+    return ret;
+}
+
 static inline bool mmuidx_sum(int mmu_idx)
 {
     return (mmu_idx & 3) == MMUIdx_S_SUM;