[Qemu-devel] trigger a gpio interrupt inside qemu

[she roy]

Is there somebody can help me to trigger a gpio interrupt inside qemu? I wrote a simple function to trigger a interrupt in pl061.c as follow:
PL061State *gPl061;
void pl061_raise_irq()
{
    qemu_set_irq(gPl061->irq, 1);
}
gPl061 is assigned in function pl061_initfn:
static int pl061_initfn(SysBusDevice *sbd)
{
    DeviceState *dev = DEVICE(sbd);
    PL061State *s = PL061(dev);
    memory_region_init_io(&s->iomem, OBJECT(s), &pl061_ops, s, "pl061", 0x1000);
    sysbus_init_mmio(sbd, &s->iomem);
    sysbus_init_irq(sbd, &s->irq);
    qdev_init_gpio_in(dev, pl061_set_irq, 8);
    qdev_init_gpio_out(dev, s->out, 8);
    pl061_reset(s);
    gPl061 = s;
    return 0;
}
I installed an interrupt handler in the guest linux system:
MODULE_LICENSE("GPL");   
MODULE_AUTHOR("sermonko");   
  
int irq = 41;   
char interface[] = "gpio";   
  
int irq_handle_function(int irq, void *device_id)   
{   
    static int count = 1;   
    MSG("[%d]receive the irq at %ld...\n", count, jiffies);   
    count++;   
    return IRQ_HANDLED;   
}   
  
int __init int_init_module()   
{   
    if(request_irq(irq, irq_handle_function, IRQF_SHARED, interface, (void *)&irq))   
    {   
        MSG("regist irq failure...\n");   
        return -EIO;   
    }   
    MSG("interface=%s and irq=%d...\n", interface, irq);   
    MSG("regist irq success...\n");   
    return 0;   
}   
  
void __exit int_cleanup_module()   
{   
    free_irq(irq, &irq);   
    MSG("unregist irq...\n");   
}
module_init(int_init_module);
module_exit(int_cleanup_module);
I start qemu using this command: qemu-system-arm -M versatilepb -kernel output/images/zImage -drive file=output/images/rootfs.ext2,if=scsi -append "root=/dev/sda console=ttyAMA0,115200" -serial stdio -net nic -net bridge,br=br0
But when i call pl061_raise_irq inside qemu once, the guest run into an infinite loop. it prints:
...
irq:[927012]receive the irq at -12002...
irq:[927013]receive the irq at -12002...
irq:[927014]receive the irq at -12002...
irq:[927015]receive the irq at -12002...
irq:[927016]receive the irq at -12002...
irq:[927017]receive the irq at -12002...
irq:[927018]receive the irq at -12002...
...
can somebody tell me what's wrong?