target/arm: Populate CPUClass.mmu_index

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

target/arm/cpu.c

@@ -133,6 +133,11 @@ static bool arm_cpu_has_work(CPUState *cs)
          | CPU_INTERRUPT_EXITTB);
 }
 
+static int arm_cpu_mmu_index(CPUState *cs, bool ifetch)
+{
+    return arm_env_mmu_index(cpu_env(cs));
+}
+
 void arm_register_pre_el_change_hook(ARMCPU *cpu, ARMELChangeHookFn *hook,
                                  void *opaque)
 {
@@ -2497,6 +2502,7 @@ static void arm_cpu_class_init(ObjectClass *oc, void *data)
 
     cc->class_by_name = arm_cpu_class_by_name;
     cc->has_work = arm_cpu_has_work;
+    cc->mmu_index = arm_cpu_mmu_index;
     cc->dump_state = arm_cpu_dump_state;
     cc->set_pc = arm_cpu_set_pc;
     cc->get_pc = arm_cpu_get_pc;