This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


RE: [Xen-devel] Shell test for pv vs hvm (vs dom0)

To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] Shell test for pv vs hvm (vs dom0)
From: "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx>
Date: Fri, 22 Feb 2008 15:38:12 -0700
Delivery-date: Fri, 22 Feb 2008 14:40:41 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <C3E4EC97.14451%Keir.Fraser@xxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
Organization: Oracle Corporation
Reply-to: "dan.magenheimer@xxxxxxxxxx" <dan.magenheimer@xxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: Ach1laKld0PCY/1YRcC+b3e4NZdSuQAAs0U9AAKXOrA=
Thanks for pointing this tool out!  Looks useful.

Unfortunately, for it to be broadly useful, it would have
to ship with all distros as compiling it "on demand" on
the guest is often not an option.

Porting xen-detect to shell script doesn't look possible since
it uses inline assembly.

Any other ideas?

> -----Original Message-----
> From: Keir Fraser [mailto:Keir.Fraser@xxxxxxxxxxxx]
> Sent: Friday, February 22, 2008 2:18 PM
> To: dan.magenheimer@xxxxxxxxxx; xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-devel] Shell test for pv vs hvm (vs dom0)
> It's not a shell script, but tools/misc/xen-detect.c will do 
> what you want
> on x86 platforms. To detect a Linux dom0 you can check for 
> 'control_d' in
> /proc/xen/capabilities.
>  -- Keir
> On 22/2/08 20:58, "Dan Magenheimer" 
> <dan.magenheimer@xxxxxxxxxx> wrote:
> > Is there an "officially sanctioned" method for a shell script to
> > test whether it is running on a native OS vs pv OS vs hvm OS
> > (and possibly also dom0 OS)?
> >
> > I know there are lots of different ways to determine this but
> > am wondering if any one will work across all (recent and future)
> > implementations of Xen and across multiple (at least Linux-based)
> > distros.
> >
> > If not, perhaps there could/should be a C/python tool in 
> the Xen tree
> > that does this?
> >
> > ===================================
> > If Xen could save time in a bottle / then clocks wouldn't 
> virtually skew /
> > It would save every tick / for VMs that aren't quick /
> > and Xen then would send them anew
> > (with apologies to the late great Jim Croce)
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel

Xen-devel mailing list