Testing before with libvirt 6.0.0-0ubuntu8.8 on Xeon 6130 (Skylake):
<mode name='host-model' supported='yes'>
<model fallback='forbid'>Cascadelake-Server</model>
<vendor>Intel</vendor>
<feature policy='require' name='ss'/>
<feature policy='require' name='vmx'/>
<feature policy='require' name='hypervisor'/>
<feature policy='require' name='tsc_adjust'/>
<feature policy='require' name='umip'/>
<feature policy='require' name='pku'/>
<feature policy='require' name='md-clear'/>
<feature policy='require' name='stibp'/>
<feature policy='require' name='arch-capabilities'/>
<feature policy='require' name='xsaves'/>
<feature policy='require' name='invtsc'/>
<feature policy='require' name='ibpb'/>
<feature policy='require' name='ibrs'/>
<feature policy='require' name='amd-stibp'/>
<feature policy='require' name='amd-ssbd'/>
<feature policy='require' name='skip-l1dfl-vmentry'/>
<feature policy='require' name='pschange-mc-no'/>
<feature policy='disable' name='avx512vnni'/>
</mode>
With 6.0.0-0ubuntu8.9
<mode name='host-model' supported='yes'>
<model fallback='forbid'>Skylake-Server-IBRS</model>
<vendor>Intel</vendor>
<feature policy='require' name='ss'/>
<feature policy='require' name='vmx'/>
<feature policy='require' name='hypervisor'/>
<feature policy='require' name='tsc_adjust'/>
<feature policy='require' name='clflushopt'/>
<feature policy='require' name='umip'/>
<feature policy='require' name='pku'/>
<feature policy='require' name='md-clear'/>
<feature policy='require' name='stibp'/>
<feature policy='require' name='arch-capabilities'/>
<feature policy='require' name='ssbd'/>
<feature policy='require' name='xsaves'/>
<feature policy='require' name='invtsc'/>
<feature policy='require' name='ibpb'/>
<feature policy='require' name='ibrs'/>
<feature policy='require' name='amd-stibp'/>
<feature policy='require' name='amd-ssbd'/>
<feature policy='require' name='skip-l1dfl-vmentry'/>
<feature policy='require' name='pschange-mc-no'/>
</mode>
On Xeon 5218 (CascadeLake)
Before/After (no change):
<mode name='host-model' supported='yes'>
<model fallback='forbid'>Cascadelake-Server</model>
<vendor>Intel</vendor>
<feature policy='require' name='ss'/>
<feature policy='require' name='vmx'/>
<feature policy='require' name='hypervisor'/>
<feature policy='require' name='tsc_adjust'/>
<feature policy='require' name='umip'/>
<feature policy='require' name='pku'/>
<feature policy='require' name='md-clear'/>
<feature policy='require' name='stibp'/>
<feature policy='require' name='arch-capabilities'/>
<feature policy='require' name='xsaves'/>
<feature policy='require' name='invtsc'/>
<feature policy='require' name='ibpb'/>
<feature policy='require' name='ibrs'/>
<feature policy='require' name='amd-stibp'/>
<feature policy='require' name='amd-ssbd'/>
<feature policy='require' name='rdctl-no'/>
<feature policy='require' name='ibrs-all'/>
<feature policy='require' name='skip-l1dfl-vmentry'/>
<feature policy='require' name='pschange-mc-no'/>
</mode>
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https://bugs.launchpad.net/bugs/1922907
Title:
Unable to use Skylake capability on Cascadelake server
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