hw/nios2: exit to main CPU loop only when unmasking interrupts

Only when guest code is unmasking interrupts, terminate the excution
of translated code and exit to the main CPU loop to handle previous
pended interrupts because of the interrupts mask by guest code.

Signed-off-by: Wentong Wu <[email protected]>
Message-id: [email protected]
Reviewed-by: Peter Maydell <[email protected]>
Signed-off-by: Peter Maydell <[email protected]>

Author: wentongwu

hw/nios2/cpu_pic.c

@@ -54,7 +54,8 @@ static void nios2_pic_cpu_handler(void *opaque, int irq, int level)
 
 void nios2_check_interrupts(CPUNios2State *env)
 {
-    if (env->irq_pending) {
+    if (env->irq_pending &&
+        (env->regs[CR_STATUS] & CR_STATUS_PIE)) {
         env->irq_pending = 0;
         cpu_interrupt(env_cpu(env), CPU_INTERRUPT_HARD);
     }