[Qemu-discuss] How to use qemu monitor "system_powerdown" on virt Cortex-A57

[wojciech.st]

Hi 

I would like to send a shutdown signal from qemu monitor as if it would be a 
physical button (power off button ). 
I run the platform as follows 
qemu-4.1.0/aarch64-softmmu/qemu-system-aarch64 -machine virt -cpu cortex-a57 
-nographic -smp 1 -m 4096 -hda buildroot-2019.05.1/output/images/rootfs.ext3 
-kernel linux-5.2.8/arch/arm64/boot/Image --append 'console=ttyAMA0 
root=/dev/vda earlyprintk=serial'

I was trying the system_powerdown in the monitor but nothing happens. 

I check the source code a little bit and found that there is some power down 
functionality implemented in hw/arm/virt.c where the GPIO 3 is assigned to the 
functionality. 

So does anyone know how to use the power down functionality from qemu monitor ? 

Regards,

Wojciech