[PATCH v3 2/6] target/riscv: Update cur_pmmask/base when xl changes

[Weiwei Li <liweiwei@iscas.ac.cn>]

write_mstatus() can only change current xl when in debug mode.
And we need update cur_pmmask/base in this case.

Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
---
 target/riscv/csr.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index d522efc0b6..43b9ad4500 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -1277,8 +1277,15 @@ static RISCVException write_mstatus(CPURISCVState *env, int csrno,
         mstatus = set_field(mstatus, MSTATUS64_SXL, xl);
     }
     env->mstatus = mstatus;
-    env->xl = cpu_recompute_xl(env);
 
+    /*
+     * Except in debug mode, UXL/SXL can only be modified by higher
+     * privilege mode. So xl will not be changed in normal mode.
+     */
+    if (env->debugger) {
+        env->xl = cpu_recompute_xl(env);
+        riscv_cpu_update_mask(env);
+    }
     return RISCV_EXCP_NONE;
 }
 
-- 
2.25.1