With xen, I can use the serial port that shows up in the VM and use "virsh console guest" to attach to its pty. With qemu and qemu-kvm, the kernel seems to recognize an emulated serial port, but I don't seem to be able to attach to it with "virsh console". Would it be possible to add the same serial console capability to kvm and qemu guests?
It looks like this would be a matter of adding a new command line parameter to the qemu command "-serial pty", keeping track of the pty device that it outputs to stdout, and then attaching to that pty in the same way that xen consoles do...
Changing version to '9' as part of upcoming Fedora 9 GA. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
Serial console support was added in libvirt 0.4.4