Hi, On Sat, Jul 21, 2012 at 04:46:18 -0500, Jared wrote: > I'm having a weird problem where libvirt/qemu/kvm won't let me use the model > processor I have defined in my domain's config file. Instead, I get the > error message in libvirtd.log that: > > warning : x86Decode:1346 : Preferred CPU model Nehalem not allowed by > hypervisor; closest supported model will be used > > If I review the qemu log for that particular domain, I see that my CPU has > been changed to this: > > -cpu kvm64,+lahf_lm,+popcnt,+sse4.2,+sse4.1,+ssse3 The problem is libvirt that starts qemu-kvm with -nodefconfig (you can try running qemu-kvm -nodefconfig -cpu \? and check the list of available CPUs), which means /etc/qemu/target-x86_64.conf file is ignored by qemu-kvm. You will need very recent qemu-kvm (at least 1.1) and libvirt (0.9.13 or newer), which finally fixed this longstanding issue. Jirka -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list