Re: [Qemu-devel] Re: expose host CPU features to guests

Jamie Lokier
2007-09-10T16:53:36Z

Paul Brook wrote:
> > > What you really want to do is ask your virtualization module what
> > > features it supports.
> >
> > Yes, that needs to be an additional filter.
>
> I'd have thought that would be the *only* interesting set for autodetection.

If that means the same as the features which are efficient for the
guest, then I agree. If there's a difference, I'd have thought you'd
normally want the guest to use only those features which work at
near-native performance, not those which involve a trap and long path
through the virtualisation/emulation, even if they're supported. No
example comes to mind, but that seems like the principle to go for, to
me.

-- Jamie