Re: [Xen-users] xen 2.0.7 on VIA C3 (EPIA)

[Harald Brass <brassh@xxxxxx>]

I'm with you as well. Tried desperately to transfer Adam's patch to xen 
2.0.6 and got the exact same "unknown interrupt" error.
Xen memory management has been completely rewritten since xen 2.0.1. It 
seems that we definitely need some developer with asm skills and deep 
insight into xen's architecture (both of which I do not have) to enable 
4kb pages support for xen 2.0.6 onwards.
It should be worth it, since it could open Xen to a wider usage besides 
the high end server field. VIA Samuel C3 allows reliable low-energy, 
fanless operation. With xen and such a mainboard, you can host 
groupware, proxy and firewall services on one single fanless computer, 
each of these services running completely separated in three xen 
domains. This is an ideal solution for small workgroups or family 
offices. We use xen 2.0.1 with Adam's patch for that purpose.
regards

> I'm on the same boat with a VIA Samuel C3. I can't get 2x  patched and
> the 3.0 series won't boot. 
>
> I don't think the C3's are high in the priority list but It would be
> awesome if one of the developers gave them some love one of these days. 
>
> - raf
>
> On Sun, 2005-10-02 at 14:58 -0700, glen martin wrote:
>   
> > On Sept 3 13:05:37, Chris Brookes <cbrookes@xxxxxxxxx 
> > <mailto:cbrookes%40gmail.com>> wrote:
> >
> >     
> > > Has anyone tried to get Xen 2.0.7 booting on a VIA EPIA board with a
> > > VIA C3 CPU?
> > >       
> > yes, but not successfully. :)
> >
> >     
> > > I know some of the EPIA mainboards have a CPU with
> > > "features" (4kb pages and no cmov instruction) that require the patch
> > > Adam Sulmicki put together for 2.0.0 and 2.0.1
> > > (http://lists.xensource.com/archives/html/xen-devel/2004-12/txt8D0L7RWimG.txt),
> > >       
> > Mine is a VIA EPIA PD6000, regarding which /proc/cpuinfo says:
> >   machine:/proc# more /proc/cpuinfo
> >   processor       : 0
> >   vendor_id       : CentaurHauls
> >   cpu family      : 6
> >   model           : 7
> >   model name      : VIA Samuel 2
> >   stepping        : 3
> >   cpu MHz         : 601.505
> >   cache size      : 64 KB
> >   fdiv_bug        : no
> >   hlt_bug         : no
> >   f00f_bug        : no 
> >   coma_bug        : no
> >   fpu             : yes
> >   fpu_exception   : yes
> >   cpuid level     : 1
> >   wp              : yes
> >   flags           : fpu de tsc msr cx8 mtrr pge mmx 3dnow
> >   bogomips        : 1187.84
> >
> >     
> > > and I have managed to patch, compile and boot a NetBSD dom0
> > > sucessfully with this version.
> > >       
> > I found this patch didn't go in cleanly (any more?) into testing (there were a
> > couple of changes to semi-magic constants in the codebase), and so I had to 
> > hand-insert a couple of chunks ... I won't post patches just yet in case my 
> > asm skills are as rusty as others' in the thread purport to be. :)
> > ...
> >     
> > > (which is a great step forward from the immediate reboot
> > > without it), 
> > >       
> > quite :)
> >
> >     
> > > however the whole thing halts with "(XEN) Unknown
> > > interrupt" just after "XEN) System RAM: 509MB (521852kB)".
> > >       
> > I've gotten to this failure now (well, I have less RAM). 
> >
> > So it's been a month since Chris posted orginally ... has anyone
> > made any progress beyond this point, or is this breaking new ground?
> >
> > Cheers,
> >
> >     
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>
>
>   

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