Re: [Qemu-devel] QEMU Alpha target

["J. Mayer" <l_indien@magic.fr>]

On Thu, 2007-03-29 at 16:25 +0100, Paul Brook wrote:
> On Thursday 29 March 2007 16:12, Stuart Brady wrote:
> > On Thu, Mar 29, 2007 at 04:08:25PM +0100, Paul Brook wrote:
> > > > There do seem to be a few people who'd like Alpha emulation for QEMU.
> > > > Obviously, you'd want to get dynamic translation working first. :-)
> > > >
> > > > OTOH, I'm now wondering which archs can support full virtualisation.
> > >
> > > Depends how you define "full virtualization". If you call kqemu full
> > > virtualization then you can do that on pretty much any CPU.
> >
> > I meant "meeting Popek and Goldberg's virtualisation requirements".
> 
> In that case, I suspect most of them don't.
> x86 certainly doesn't. Recent VT/SVM extensions bring it close, but there are 
> still problems.
> PPC and SPARC also have hypervisor extensions, which suggests the conventional 
> instruction sets don't allow full virtualization.

PowerPC is fully virtualisable which is what Mac-On-Linux is supposed to
do. But this has a cost. Hypervisor mode seems to exists only to do the
same without any performance degradation.

-- 
J. Mayer <l_indien@magic.fr>
Never organized