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From Adam Witwicki <>
Subject CPU compatibility issue
Date Wed, 05 Jun 2019 12:08:12 GMT

I am having an issue on a new test system, cloudstack version 4.11.00 (shapeblue) with KVM
(Ubuntu 16.04), In production and in the past I have used these settings in the


As this was needed to allow windows 2016 to boot and allow live migration

Yet now on a clean install I get this error when trying to start any instance (console, router,

2019-06-05 13:03:13,282 WARN  [resource.wrapper.LibvirtStartCommandWrapper] (agentRequest-Handler-5:null)
(logid:2df290f8) LibvirtException
org.libvirt.LibvirtException: unsupported configuration: guest and host CPU are not compatible:
Host CPU does not provide required features: avx, xsave, aes, tsc-deadline, x2apic, pclmuldq

If I use host-passthrough it works

This may be a clue
but I am not sure.

Can anyone explain what is going on?



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