Re: [Xen-users] Intel VT-d Support

[Jeroen Torrekens <jeroen.torrekens@xxxxxxxxxxx>]

----- "Igor Chubin" <igor@xxxxxxx> wrote:
> Guys, thank you for your answers, but the question was 
> not about VMX, but about VT-d.
> It's not the same!
> 
> 
> On Mi, MÃr 05, 2008 at 10:31:59 +0000, Luciano Rocha wrote:
> > On Wed, Mar 05, 2008 at 12:00:06PM +0100, Stephan Seitz wrote:
> > >  Igor Chubin schrieb:
> > > > Hello all, please tell me, how can I be sure that my Xen
> installation is 
> > > > built with Intel VT-d support?
> > > > Something like xm info | grep -i KEY-REGULAR-EXPRESSION
> > > > xm dmesg | grep -i KEY-REGULAR-EXPRESSION
> > > > What line I should look for?
> > > > And if it's really built with it, how can I be sure, that Xen
> has 
> > > > successfully initialized VT-d hardware?
> > > 
> > >  As far as I know, xm dmesg should show this, but I didn't find
> any vt-d 
> > >  enabled hardware by now.
> > >  If you're hardware supports vt-d could you please post the model
> and vendor?
> > 
> > This is in my xm dmesg:
> > (XEN) HVM: VMX enabled
> > (XEN) VMX: MSR intercept bitmap enabled
> > (XEN) CPU0: Intel(R) Xeon(R) CPU           E5430  @ 2.66GHz stepping
> 06
> > 
> > And in my xm info:
> > xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p
> hvm-3.0-x86_32
> > hvm-3.0-x86_32p hvm-3.0-x86_64
> > 
> > Note that VMX support might be disabled by the BIOS.
> > 
> > -- 
> > lfr
> > 0/0

What do you mean by: it is not the same? If VT is enabled in the BIOS you will 
see vmx as processor capability in /proc/cpuinfo. If VT is disabled in the 
BIOS, you will not see vmx in the capabilities array. VT == VT-d == vmx unless 
I really missed something...

Cheers,
Jeroen

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