diff --git a/target/hppa/cpu.c b/target/hppa/cpu.c
index 3c019855b4..fbb37e541e 100644
--- a/target/hppa/cpu.c
+++ b/target/hppa/cpu.c
@@ -94,6 +94,17 @@ static bool hppa_cpu_has_work(CPUState *cs)
     return cs->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI);
 }
 
+int hppa_cpu_mmu_index(CPUState *cs, bool ifetch)
+{
+    CPUHPPAState *env = cpu_env(cs);
+
+    if (env->psw & (ifetch ? PSW_C : PSW_D)) {
+        return PRIV_P_TO_MMU_IDX(env->iaoq_f & 3, env->psw & PSW_P);
+    }
+    /* mmu disabled */
+    return env->psw & PSW_W ? MMU_ABS_W_IDX : MMU_ABS_IDX;
+}
+
 static void hppa_cpu_disas_set_info(CPUState *cs, disassemble_info *info)
 {
     info->mach = bfd_mach_hppa20;
@@ -194,6 +205,7 @@ static void hppa_cpu_class_init(ObjectClass *oc, void *data)
 
     cc->class_by_name = hppa_cpu_class_by_name;
     cc->has_work = hppa_cpu_has_work;
+    cc->mmu_index = hppa_cpu_mmu_index;
     cc->dump_state = hppa_cpu_dump_state;
     cc->set_pc = hppa_cpu_set_pc;
     cc->get_pc = hppa_cpu_get_pc;
diff --git a/target/hppa/cpu.h b/target/hppa/cpu.h
index 6a153405d2..04439f247d 100644
--- a/target/hppa/cpu.h
+++ b/target/hppa/cpu.h
@@ -281,16 +281,13 @@ static inline int HPPA_BTLB_ENTRIES(CPUHPPAState *env)
     return hppa_is_pa20(env) ? 0 : PA10_BTLB_FIXED + PA10_BTLB_VARIABLE;
 }
 
+int hppa_cpu_mmu_index(CPUState *cs, bool ifetch);
 static inline int cpu_mmu_index(CPUHPPAState *env, bool ifetch)
 {
 #ifdef CONFIG_USER_ONLY
     return MMU_USER_IDX;
 #else
-    if (env->psw & (ifetch ? PSW_C : PSW_D)) {
-        return PRIV_P_TO_MMU_IDX(env->iaoq_f & 3, env->psw & PSW_P);
-    }
-    /* mmu disabled */
-    return env->psw & PSW_W ? MMU_ABS_W_IDX : MMU_ABS_IDX;
+    return hppa_cpu_mmu_index(env_cpu(env), ifetch);
 #endif
 }