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https://bugzilla.redhat.com/show_bug.cgi?id=1049391 When all source CPU XMLs contain just a single CPU model (with a possibly varying set of additional feature elements), virConnectBaselineCPU will try to use this CPU model in the computed guest CPU. Thus, when used on just a single CPU (useful with VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES), the result will not use a different CPU model. If the computed CPU uses the source model, set fallback mode to 'forbid' to make sure the guest CPU will always be as close as possible to the source CPUs.
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>