Yes. You will need the freshest builds and also a namespace string if you're using libvirt. <div class="gmail_quote">On Oct 5, 2015 4:48 PM, <<a href="mailto:root@yoshi.dynu.com">root@yoshi.dynu.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Ok, i guess you are talking about the 'hv_vendor_id' flag? usage would be, for example : qemu-system-x64_86 -cpu host,hv_vendor_id=deadbeef , correct? my qemu version is not recognizing the flag so i am compiling the latest version from git right now. If i am correct this patch had just been added? Cheers </blockquote></div>