Re: [Xen-users] Re: HVM domU Solaris 10 (Marc Patino G?mez)

[jim burns <jim_burn@xxxxxxxxxxxxx>]

All PC OSs start out in real mode after a reset/reboot, and switch over to 
protected mode, so Xen's real mode implementation can't be all that bad. It 
sounds like this is a problem with OpenSolaris, not Windows. The real test 
would be running Win98 command.com - the classic example of real mode 
switching. Anyone have trouble with that?

 On Sat September 22 2007 7:46:54 am sven waeyenbergh wrote:
> Hi list,
>
> i've been wondering the same thing as Marc Patino above,
> i have been building Intel boxes up until now, especially with the
> multicore Intels being quite cheap.
> can anyone confirm that a new large box, meant to run paravirt and hvm, AMD
> would be the better choice ?
> i think real mode HVM would be very interesting to have.
> does anyone know where to find more info on this ?
>
> Thanks,
> Sven
>
> On 9/21/07, Marc Patino GÃmez <mpatino@xxxxxxxxxxxx> wrote:
> > Hi again Joe,
> >
> > so.. in your opinion AMD processors are better to make h/w
> > virtualization? I am planing to buy a "big server" (4 ways) to host
> > multiple Windows domU and of course I want the most convenient CPUs for
> > it.
> >
> > Thanks in advance,
> >
> > Marc
> >
> > Joe Bonasera wrote:
> > > Because AMD h/w virtualization support virtualizes guest real mode, but
> > > Intel VT-x doesn't. Therefore Xen has to rely on software
> > > instruction emulation for guest real mode. The Xen code
> > > for that emulation is incomplete and somewhat wrong. We've fixed it in
> > > some
> > > patches we apply to the hypervisor version that will come with
> > > OpenSolaris.
> > > However, the patches have not been pushed back into the upstream
> > > code base yet. Until that happens, if you're interested in using
> > > S10 in an HVM domain, use AMD processors.
> > >
> > > Joe
> > >
> > > ------------------------------
> > >
> > > Message: 7
> > > Date: Fri, 21 Sep 2007 17:01:58 +0200
> > > From: Marc Patino G?mez <mpatino@xxxxxxxxxxxx>
> > > Subject: [Xen-users] HVM domU Solaris 10
> > > To: xen-users@xxxxxxxxxxxxxxxxxxx
> > > Message-ID: <46F3DCE6.4080006@xxxxxxxxxxxx>
> > > Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> > >
> > > Hi,
> > >
> > > Anybody knows why a Solaris 10 HVM domU hangs when kernel is booting on
> > > my Intel CPU box. I had no problem installing Solaris 10 on an AMD CPU
> > > Box.
> > >
> > > Any advices?
> > >
> > > Many thanks,
> > >
> > > Marc
> > >
> > > _______________________________________________
> > > Xen-users mailing list
> > > Xen-users@xxxxxxxxxxxxxxxxxxx
> > > http://lists.xensource.com/xen-users
> >
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