latest xen 4 and libvirt.

For connect libvirt to xen4 on fedora15 require install latest version of libvirt.
Today it is
rpm -Uvh http://kojipkgs.fedoraproject.org/packages/libvirt/0.9.3/2.fc16/x86_64/libvirt-0.9.3-2.fc16.x86_64.rpm http://kojipkgs.fedoraproject.org/packages/libvirt/0.9.3/2.fc16/x86_64/libvirt-python-0.9.3-2.fc16.x86_64.rpm http://kojipkgs.fedoraproject.org/packages/libvirt/0.9.3/2.fc16/x86_64/libvirt-client-0.9.3-2.fc16.x86_64.rpm http://kojipkgs.fedoraproject.org/packages/parted/3.0/2.fc16/x86_64/parted-3.0-2.fc16.x86_64.rpm http://kojipkgs.fedoraproject.org/packages/netcf/0.1.8/1.fc16/x86_64/netcf-libs-0.1.8-1.fc16.x86_64.rpm

But after tests: kvm is faster simpler and better.