Public bug reported:

Problem:
vsock can't be used with Secure Execution
 
---uname output---
Linux se1 5.4.0-62-generic #70-Ubuntu SMP Tue Jan 12 16:27:38 UTC 2021 s390x 
s390x s390x GNU/Linux
 
Machine Type = z15 8562 
 
---Debugger---
A debugger is not configured
 
---Steps to Reproduce---
In a Secure Execution environment the Qemu driver vhost-vsock-ccw driver 
requires the argument "iommu_platform=on". 

E.g. "qemu-system-s390x -device vhost-vsock-ccw,guest-
cid=42,iommu_platform=on ..."

Currently Libvirt does not support this argument. Therfore Vsock can't be 
defined in XML correctly. Libvirt Version is 6.0.0-0ubuntu8.5.
 
Userspace tool common name: virsh  
The userspace tool has the following bit modes: 64
Userspace rpm: libvirt-clients 
Userspace tool obtained from project website:  na 

Please apply this update to 21.04, 20.10 and 20.04 !

** Affects: linux (Ubuntu)
     Importance: Undecided
     Assignee: Skipper Bug Screeners (skipper-screen-team)
         Status: New


** Tags: architecture-s39064 bugnameltc-191018 severity-medium 
targetmilestone-inin2104

** Tags added: architecture-s39064 bugnameltc-191018 severity-medium
targetmilestone-inin2104

** Changed in: ubuntu
     Assignee: (unassigned) => Skipper Bug Screeners (skipper-screen-team)

** Package changed: ubuntu => linux (Ubuntu)

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https://bugs.launchpad.net/bugs/1913266

Title:
  [UBUNTU 20.04] Vsock can't be used with Secure Execution, required
  argument not supported

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