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Each CPU model with -v* suffix is defined as a standalone model copying all attributes of the previous version. CPU model versions with an alias are handled differently. The full definition is used for the alias and the versioned model is created as an identical copy of the alias. To avoid breaking migration compatibility of host-model CPUs all versioned models are marked with <decode guest='off'/> so that they are ignored when selecting candidates for host-model. It's not ideal but not doing so would break almost all host-model CPUs as the new versioned CPU models have all vmx-* features included since their introduction while existing CPU models were updated later. This meas existing models would be accompanied with a long list of vmx-* features to properly describe a host CPU while the newly added CPU models would have those features enabled implicitly and their list of features would be significantly shorter. Thus the new models would always be better candidates for host-model than the existing models. Signed-off-by: Jiri Denemark <jdenemar@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
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==============================
Libvirt API for virtualization
==============================
Libvirt provides a portable, long term stable C API for managing the
virtualization technologies provided by many operating systems. It
includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware
vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER
Hypervisor.
For some of these hypervisors, it provides a stateful management
daemon which runs on the virtualization host allowing access to the
API both by non-privileged local users and remote users.
Layered packages provide bindings of the libvirt C API into other
languages including Python, Perl, PHP, Go, Java, OCaml, as well as
mappings into object systems such as GObject, CIM and SNMP.
Further information about the libvirt project can be found on the
website:
https://libvirt.org
License
=======
The libvirt C API is distributed under the terms of GNU Lesser General
Public License, version 2.1 (or later). Some parts of the code that are
not part of the C library may have the more restrictive GNU General
Public License, version 2.0 (or later). See the files ``COPYING.LESSER``
and ``COPYING`` for full license terms & conditions.
Installation
============
Instructions on building and installing libvirt can be found on the website:
https://libvirt.org/compiling.html
Contributing
============
The libvirt project welcomes contributions in many ways. For most components
the best way to contribute is to send patches to the primary development
mailing list. Further guidance on this can be found on the website:
https://libvirt.org/contribute.html
Contact
=======
The libvirt project has two primary mailing lists:
* users@lists.libvirt.org (**for user discussions**)
* devel@lists.libvirt.org (**for development only**)
Further details on contacting the project are available on the website:
https://libvirt.org/contact.html