FreeBSD 12.x, virtio and alicloud (aliyun.com)

[Eugene M. Zheganin]

Hello,


Guys, does anyone have VM running in AliCloud Chinese provider (one of 
the biggest, if not the biggest one) ? They seem to provide stock 
FreeBSD 11.x images on some Redhat-based Linux with VirtIO which run 
just fine (at least I take a look at their kernel and it seem to be a 
stock GENERIC), but after source uprgading to 12.2 it cannot mountroot, 
because literally no disks are found after thee kernel booting stage. 
This, in turn, is cause by a bunch of repeatable virtio errors, which 
looks like (screenshot provided in the link):


virtio_pci1: cannot map I/O space

device_attach:  virtio_pci1 attach returned 6


(https://enazadev.ru/stub-data/freebsd12-alicloud-cannot-map-io.png)

So not only vtbd0 cannot be attached to, but also a network adater. 
Surprisingly, virtio_console and memory baloon device seems to be working.

I've took a look at various VirtIO cases in the bug tracker and compiled 
a kernel without netmap (yeah, after some consideration this could help 
only with virtio_net part), but this doesn't help.

Is this some sort of regression that needs to be reported ? Is there 
some kind of known workaround ?

I also have a running 11.3 on a second VM, so I can provide any 
necessary details if needed.


Thanks.

Eugene.