Re: virtio-pci in qemu-system-arm is broken in 8.2

[Michael Tokarev]

04.01.2024 17:41, Peter Maydell wrote:
..
> Can you provide a complete repro case including full command
> line and all image files needed to run it, please?

Sure, please excuse me for not doing this at the very beginning.
The test is just standard debian kernel+initrd (I used sid/unstable
kernel, but it looks like bookworm kernel also "works").

http://www.corpit.ru/mjt/tmp/virtio-arm.tar.gz

this archive contains kernel+initrd.  I run it this way:

qemu-system-arm -append root=LABEL=debvm -nographic -machine type=virt \
 -drive media=disk,format=raw,file=vmlinuz,if=virtio,snapshot=on \
 -no-user-config -m 1G -kernel vmlinuz -initrd initrd.img

Note "vmlinuz" file is used as both kernel and a hdd image, -
this is just to have at least one virtio device.  Obviously
with such a setup, guest will not find its root fs, but it
will (or not, in the problematic/buggy case) load the virtio
modules.

When run under qemu-system-arm v8.2.0, no virtio drivers are
loaded.

/mjt