RE: [Xen-users] VT/IVT enabled xen version

[Yoshiya ETO <eto@xxxxxxxxxxxxxxxx>]

　Cambridgeには、VT enableのCPUがあると言ってますね。
うちにも欲しいですね。この際、VT-xでもいいから。

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> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Mark
Williamson
> Sent: Friday, April 22, 2005 8:34 AM
> To: Nils Toedtmann
> Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] VT/IVT enabled xen version
>
> > So for VT mode there is no VT CPU support (intel vanderpool or amd
> > pacifica) necessary?
>
> Unfortunately, yes, you do need a VT CPU.
>
> > Afaik such processors are not available yet?
>
> They do exist but they're not available to buy ;-)  We have a number of
them
> in Cambridge.  People from Intel are writing the VT code themselves.
>
> > I read
> > something like "for VT to work the CPU has to support a mode called VMX
> > or 'ring -1'" - whatever that means ...
>
> VT adds an "root mode" and a "non root" mode to the usual 4 rings.  "Ring
-1"
> is basically root mode ring 0, which is what the hypervisor runs in.
>
> Cheers,
> Mark
>
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