On 20/11/2014 11:00, Dr. David Alan Gilbert wrote: >> > I'm still not sure why the configuration should differ for "-M pc" >> > depending on whether xen is enabled. > I think this goes back to: > > commit 1611977c3d8fdbdac6090cbd1f5555cee4aed6d9 > Author: Anthony PERARD <anthony.per...@citrix.com> > Date: Tue May 3 17:06:54 2011 +0100 > > pc, Disable vmport initialisation with Xen. > > This is because there is not synchronisation of the vcpu register > between Xen and QEMU, so vmport can't work properly. > > This patch introduces no_vmport parameter to pc_basic_device_init. > > Signed-off-by: Anthony PERARD <anthony.per...@citrix.com> > Signed-off-by: Alexander Graf <ag...@suse.de>
Yes, but Xen has since implemented vmport (commit 37f9e258). It's fine to have a conservative default for "-M xenfv" and possibly "-M pc-2.1", but "-M pc" can require the latest hypervisor. Paolo
