/usr/share/doc/xen-<version-number>/ is the directory which contains information about the Xen para-virtualization hypervisor and associated management tools, including various example configurations, hardware-specific information, and the current Xen upstream user documentation.
man virsh and
/usr/share/doc/libvirt-<version-number> — Contains sub commands and options for the
virsh virtual machine management utility as well as comprehensive information about the
libvirt virtualization library API.
/usr/share/doc/gnome-applet-vm-<version-number> — Documentation for the GNOME graphical panel applet that monitors and manages locally-running virtual machines.
/usr/share/doc/libvirt-python-<version-number> — Provides details on the Python bindings for the
libvirt library. The
libvirt-python package allows python developers to create programs that interface with the
libvirt virtualization management library.
/usr/share/doc/python-virtinst-<version-number> — Provides documentation on the
virt-install command that helps in starting installations of Fedora and Red Hat Enterprise Linux related distributions inside of virtual machines.
/usr/share/doc/virt-manager-<version-number> — Provides documentation on the Virtual Machine Manager, which provides a graphical tool for administering virtual machines.