Il giorno ven 8 mag 2020 alle ore 17:23 Gianluca Cecchi <gianluca.cecchi@gmail.com> ha scritto:
Hello,
I have this problem I posted for beta4 also with the RC1 installation:

https://lists.ovirt.org/archives/list/users@ovirt.org/message/CR6XYIEYHT4N75UWEXMTJR2AKB3DYL6X/

At final stage when engine VM has to start from hosted engine storage domain

libvirt.libvirtError: unsupported configuration: unknown CPU feature: tsx-ctrl
2020-05-08 17:13:51,080+0200 INFO  (vm/7194f9ff) [virt.vm] (vmId='7194f9ff-1d73-4a0d-987e-3e82060c2d99') Changed state to Down: unsupported configuration: unknown CPU feature: tsx-ctrl (code=1) (vm:1629)

any hint on how to workaround and test on my nested environment?

+Ryan Barry +Michal Skrivanek can you please look into this? Seems like in 4.3.9 CPU was set to 
-machine pc-i440fx-rhel7.6.0,accel=kvm,usb=off,dump-guest-core=off \
-cpu Skylake-Server,spec-ctrl=on,ssbd=on,md-clear=on \

while on 4.4.0 it's set to:
<cpu match="exact"> <model>Cascadelake-Server</model> <feature name="md-clear" policy="require"/> <feature name="mds-no" policy="require"/> <feature name="hle" policy="disable"/> <feature name="rtm" policy="disable"/> <feature name="tsx-ctrl" policy="require"/> <feature name="arch-capabilities" policy="require"/> <topology cores="2" sockets="16" threads="1"/> <numa> <cell cpus="0-31" id="0" memory="16777216"/> </numa> </cpu>

and it fails on missing tsx-ctrl feature.

Maybe related to partial implementation on Bug 1674420 - [RFE] - add support for Cascadelake-Server CPUs (and IvyBridge)  
which is targeted to 4.4.2?
Gianluca, can you confirm your host has Cascadelake-Server CPU ?
If so, please note Cascadelake is not listed in supported CPUs: https://ovirt.org/documentation/installing_ovirt_as_a_self-hosted_engine_using_the_cockpit_web_interface/#CPU_Requirements_SHE_cockpit_deploy
 
Thanks,
Gianluca
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