[Libvir] More queries

Hi, I've more quries on libvirt apis: 1. Is there any API in libvirt that gives me the uptime of the guets. 2. Can I know how many physical CPUs are dedicated to a VM or if they are shared. 3. How do I know the logical cpu consumption of the guests( from dom0 using libvirt obviously). 4. Can get the ip address of each of the guests with any of the APIs Thanks, Vadiraj