[libvirt] cpu_map data access for libxl driver

Hi Jiri, all, As I mentioned earlier today on IRC, I have started implementing CPU configuration support for libxl driver. libxl expects a string definition the state of all the feature (easy to create), but also the numeric values for the CPU family and model. virCPUDef holds the name as a string, but not the numeric values though there are stored in the cpu_map.xml. For what libxl expects, search for 'cpuid=' in this man page: http://xenbits.xen.org/docs/unstable/man/xl.cfg.5.html Any idea how to get those values from the libxl driver? -- Cedric