Microsoft no longer supports Windows 2008R2 at all. Windows 2012 and
2012 R2 are still within extended support until October 9, 2023.
Hyper-V's WMI API has two versions. V1 is supported by 2008R2 and 2012.
2012 also offered initial support for V2, but it's incomplete.
2012R2 was the first version to offer full support for the V2 API.
This patchset drops support for the V1 WMI API.
Here's a GitLab merge request, if you'd prefer to review it there:
https://gitlab.com/iammattcoleman/libvirt/-/merge_requests/7