[Qemu-arm] Windows11 guest Fast startup cannot work

[yezengruan]

Hi,

I want to improve the startup speed of Windows VM. On the x86 
architecture, QEMU's Windows11 VM can enable the Fast startup function, 
but it cannot work on the ARM architecture. By the way, the Fast startup 
function of Windows on ARM physical machines can work normally.

Is there anything missing in QEMU's ARM architecture for Windows guest?

My environmental information:
Linux 5.10
QEMU 6.2.0
Guest: Windows11 ARM

QEMU command line:
qemu-system-aarch64 -nodefaults -machine 
virt,kernel-irqchip=on,virtualization=off,gic-version=3,its=off -accel 
kvm -cpu host -m 6144 -smp 6 -bios 
/usr/share/edk2/aarch64/QEMU_EFI-pflash.raw -drive 
if=none,id=system,format=qcow2,file=/data/images/win11_disk.qcow2 
-device virtio-blk-pci,drive=system -device 
nec-usb-xhci,msix=off,msi=off -device usb-kbd -device usb-tablet -device 
ramfb -display gtk -name Windows -qmp unix:/tmp/qmp.socket,server,nowait 
-d all -D /tmp/qemu.log -msg timestamp=on

Refer to the Fast startup link below:
https://learn.microsoft.com/en-us/windows-hardware/test/weg/delivering-a-great-startup-and-shutdown-experience

Thank you.
Zengruan Ye