Ubuntu
libvirt package

  1. Bug #1978064
  2. Comment #27

Comment 27 for bug 1978064

Revision history for this message
Alan Baghumian (alanbach) wrote :

@Lena seems like the workaround does not work on Cascadelake based processors:

Error starting thread.: nova.exception.InvalidCPUInfo: Configured CPU model: Cascadelake-Server-noTSX is not compatible with host CPU.

The workaround was to use:

[libvirt]
cpu-model: Broadwell-noTSX
cpu-model-extra-flags: abm arat avx512bw avx512cd avx512dq avx512f avx512vl avx512vnni clflushopt clwb f16c pdpe1gb pku rdrand spec-ctrl ssbd vme xgetbv1 xsavec xsaveopt

Instead of:

[libvirt]
cpu-model: Cascadelake-Server-noTSX
cpu-model-extra-flags: -mpx

To make it work. Just wanted to paste it here in case anyone else encounters this issue.