When modify register CSR_STLBPS, the page size should come from
input parameter rather than old value.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
---
 target/loongarch/tcg/csr_helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/loongarch/tcg/csr_helper.c b/target/loongarch/tcg/csr_helper.c
index 0d99e2c92b..4433167332 100644
--- a/target/loongarch/tcg/csr_helper.c
+++ b/target/loongarch/tcg/csr_helper.c
@@ -26,7 +26,7 @@ target_ulong helper_csrwr_stlbps(CPULoongArchState *env, target_ulong val)
      * The real hardware only supports the min tlb_ps is 12
      * tlb_ps=0 may cause undefined-behavior.
      */
-    uint8_t tlb_ps = FIELD_EX64(env->CSR_STLBPS, CSR_STLBPS, PS);
+    uint8_t tlb_ps = FIELD_EX64(val, CSR_STLBPS, PS);
     if (!check_ps(env, tlb_ps)) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "Attempted set ps %d\n", tlb_ps);
-- 
2.39.3