GitHub user gvaishya added a comment to the discussion: vm deployement failing 
on apache cloud statck 4.20.2

we have not faced such kind of issues in past and we are running more than 10 
apache cloud stack instance with same setup. we are facing this issue on this 
new deployment where vm deployment is failing with below error

2026-08-05 17:38:03,289 WARN  [resource.wrapper.LibvirtStartCommandWrapper] 
(AgentRequest-Handler-4:[]) (logid:) LibvirtException 
org.libvirt.LibvirtException: unsupported configuration: more than 255 vCPUs 
require extended interrupt mode enabled on the iommu device

2026-08-05 17:41:21,475 WARN  [kvm.resource.LibvirtKvmAgentHook] 
(AgentRequest-Handler-2:[]) (logid:) Groovy scripting engine is not 
initialized. Data transformation skipped.
2026-08-05 17:41:21,503 WARN  [resource.wrapper.LibvirtStartCommandWrapper] 
(AgentRequest-Handler-2:[]) (logid:) LibvirtException 
org.libvirt.LibvirtException: unsupported configuration: Maximum CPUs greater 
than specified machine type limit 240
at org.libvirt.ErrorHandler.processEr

GitHub link: 
https://github.com/apache/cloudstack/discussions/13802#discussioncomment-17907437

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