From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Dan Magenheimer" <dan.magenheimer@oracle.com>
Subject: RE: Shell test for pv vs hvm (vs dom0)
Date: Mon, 25 Feb 2008 08:38:13 -0700
Message-ID: <20080225083813375.00000003172@djm-pc>
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To: "Daniel P. Berrange" <berrange@redhat.com>, Keir Fraser <Keir.Fraser@cl.cam.ac.uk>, Alex Williamson <alex.williamson@hp.com>
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Thanks much!  These are great!

> -----Original Message-----
> From: Daniel P. Berrange [mailto:berrange@redhat.com]
> Sent: Monday, February 25, 2008 6:46 AM
> To: Keir Fraser
> Cc: Alex Williamson; dan.magenheimer@oracle.com;
> xen-devel@lists.xensource.com
> Subject: Re: [Xen-devel] Shell test for pv vs hvm (vs dom0)
> =

> =

> On Mon, Feb 25, 2008 at 01:40:05PM +0000, Keir Fraser wrote:
> > Yes, that should work for Linux just fine I think.
> =

> On x86 at least you also have the option of using  dmidecode =

> to detect an
> HVM guest, looking for 'Xen' in the 'System Information' block.
> =

> And the 'xen-detect' command in tools/misc/ provides another way to
> detect presence of Xen PV vs HVM.
> =

> > On 25/2/08 12:58, "Alex Williamson" <alex.williamson@hp.com> wrote:
> >
> > >
> > > On Sat, 2008-02-23 at 08:18 +0000, Keir Fraser wrote:
> > >> There's no general way to discriminate between HVM and =

> native from a shell
> > >> script. You might discriminate between HVM and PV on =

> Linux by looking for
> > >> /sys/hypervisor or /proc/xen.
> > >
> > > Isn't something like this generally sufficient for a shell script?
> > >
> > > lspci -n | grep -q "5853:0001"
> > > if [ $? -eq 0 ]; then
> > > # HVM domain
> > > elif [ -d /proc/xen ]; then
> > > if grep -q "control_d" /proc/xen/capabilities; then
> > > # DOM0
> > > else
> > > # DOMU
> > > fi
> > > else
> > > # Native
> > > fi
> > >
> > > It seems fairly reliable on ia64 for Xen 3.x.  Thanks,
> > >
> > > Alex
> >
> >
> >
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.xensource.com
> > http://lists.xensource.com/xen-devel
> =

> --
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> 978 392 2496 -=3D|
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