RE: [Xen-users] DELL PowerEdge 2850 - no CPU vme support

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Martin Polehla
> Sent: 14 September 2006 12:00
> To: Xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] DELL PowerEdge 2850 - no CPU vme support
> 
> Hello,
> I were looking for some informations about XEN on dell site, 
> but I didn't found anythink usefull. 
> 
> But on:
>   http://www.xensource.com/community/xen30testing/summary.php
> I found that dell poweredge 2850 passed tests, and also ouput 
> from xen test cd looks good (all tests OK, kernel on xen test 
> CD says vme support (/proc/cpuinfo) etc.

You're looking for the wrong CPU feature bit. The cpu-feature "VME" is
"Virtual Mode Extension", which is nothing to do with the virtualization
features recently added to Intel and AMD processors. [For those
interested: It's an extension to the VM86 mode of the processor, which
is generally used for running "DOS-box" applications in Windows [and
similar features in other OS's]. The VME extensions allows "Virtual
Interrupts" if enabled in CR4]. 

"VMX" is what you need to look for, and if you don't have that, you'll
need to either enable it in the BIOS (assuming the BIOS does have a way
to enable it) or replace enough hardware to be able to get it working -
I'm no expert at DELL boxes, so I can't really speak for exactly what
you need to do, but if you want to run Windows as a virtual machine, you
need to get a VMX feature bit in /proc/cpuinfo

--
Mats

> 
> I was progessing as dell howto saying, but no succes :-(
> 
> Have anyone xen with virtual windowsXP guest under linux xine 
> host running ?
> 
> any suggesntions ?
> 
> thanks
> p0l0us
> 
> On Mon, 28 Aug 2006 10:13:39 +0200
> Ivan Porro <pivan@xxxxxxxxxxxxx> wrote:
> 
> > 
> > Have a look to this article I've spotted time ago.. maybe 
> you can go 
> > back to people who
> > wrote the article (ok, I know they used RedHat, but...)
> > Hope this help
> > 
> > ivan
> > 
> > 
> http://www.dell.com/downloads/global/power/ps2q06-20050322-Sch
> midt-OE.pdf
> > 
> > 
> > Martin Polehla wrote:
> > > Hello,
> > > I'm trying to get working xen on dell poweredge 2850 with 
> two Intel(R)
> > > Xeon(TM) CPU 2.80GHz using gentoo amd64 distribution settings.
> > >
> > > When boot with gentoo sources 2.6.16-genoo-r13 or gentoo 
> kernel sources
> > > 2.6.17, cat /proc/cpuinfo show me:
> > >
> > > flags           : fpu vme de pse tsc msr pae mce cx8 apic 
> sep mtrr pge
> > > mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss 
> ht tm syscall
> > > nx lm constant_tsc pni monitor ds_cpl cid cx16 xtpr
> > >
> > > But with xen kernel (I've tried install xen according to
> > > http://gentoo-wiki.com/HOWTO_Xen_and_Gentoo) it didn't 
> show vme support.
> > > I copied .config from my gentoo sources (where vme works) 
> to xen sources
> > > and configure xen support in kernel. But it did't help. I 
> cannot see any
> > > VM messages in xm dmesg and so.
> > >
> > > After it I read instructions on xen web site and I used 
> xen tgz file
> > > from official download, but with same result.
> > >
> > > Always when I tried create WinXP host it return an error. 
> I found on
> > > this list that error means vme is not supported by cpu. 
> :-( But I cannot
> > > get vme working with xen kernels.
> > >
> > > Please, can anyone help me make it working properly ?
> > >
> > > Thanks a lot for support
> > > Martin Polehla
> > >
> > > _______________________________________________
> > > Xen-users mailing list
> > > Xen-users@xxxxxxxxxxxxxxxxxxx
> > > http://lists.xensource.com/xen-users
> > >
> > >   
> > 
> > 
> > -- 
> > www.bio.dist.unige.it
> > phone: +39 10 353.2789
> > fax:   +39 10 353.2948
> 
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> 



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