Mailing the story:
Setup OpenSolaris 1002-127 PV DomU at Xen 3.4.2 & Libvirt 0.7.1-15 (2.6.31.6 pvops) on top of F12 per John Levon
Blog entry "OpenSolaris 2008.11 guest domain on a Linux dom0" was written by John Levon and supposed to help community users to install OSOL 2008-11 DomU at Xen 3.1 Dom0 on top of Fedora 8. It’s core technique utilizes virsh , so is supposed to be applicable to current release of Libvirt as well. However , /usr/bin/xenstore-read fails to obtain IP address for OSOL DomU via XenStore at Xen 3.4.2 Dom0. Posting bellow fixes this issue and provide an option to build via virsh the most recent OSOL PV DomU at Xen 3.4.2 Dom0 & Libvirt 0.7.1-15 on Fedora 12.