------- Comment From [email protected] 2026-08-11 06:48 EDT-------
(In reply to comment #17)
> Hello Eric,
>
> I recreated the PPA and upload the package into it,
> it is building right now, please take a look when it finishes

Hi Hector,

Thank you for recreating that.

I verified that I can recreate the problem on an unmodified 22.04 host:

> root@a46lp19:~# virsh attach-device guest-qcow mdev.xml
> error: Failed to attach device from mdev.xml
> error: internal error: unable to execute QEMU command 'device_add': 
> s390_ccw_realize: Failed to build initial schib: Invalid argument

> root@a46lp19:~# dmesg | tail
> [65871.421624] audit: type=1400 audit(1786444526.481:69): apparmor="STATUS" 
> operation="profile_replace" profile="unconfined" 
> name="libvirt-91ca2aa5-6f47-48b9-9787-7c511682176c" pid=64913 
> comm="apparmor_parser"
> [65871.423886] audit: type=1400 audit(1786444526.491:70): apparmor="DENIED" 
> operation="open" profile="libvirt-91ca2aa5-6f47-48b9-9787-7c511682176c" 
> name="/sys/devices/css0/0.0.0048/pimpampom" pid=64336 comm="qemu-system-s39" 
> requested_mask="r" denied_mask="r" fsuid=64055 ouid=0
> [65871.684969] audit: type=1400 audit(1786444526.751:71): apparmor="STATUS" 
> operation="profile_replace" profile="unconfined" 
> name="libvirt-91ca2aa5-6f47-48b9-9787-7c511682176c" pid=64917 
> comm="apparmor_parser"

I applied your PPA and upgraded/restarted libvirt, and problem goes
away.

> root@a46lp19:~# virsh attach-device guest-qcow mdev.xml
> Device attached successfully

I've been messing with it a bit longer, and everything seems to be
behaving correctly.

Thank you!

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https://bugs.launchpad.net/bugs/2056441

Title:
  [UBUNTU 20.04] Cannot use vfio-ccw dasd passthrough for KVM guests
  under Ubuntu

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