Re: [Xen-users] 32bit domU on 64 bit dom0

["Daniel P. Berrange" <berrange@xxxxxxxxxx>]

On Tue, Aug 14, 2007 at 03:33:53AM +0100, Mark Williamson wrote:
> > Yes it is possible.  But you must have a kernel with the 3.1 patches
> > on dom0 and on dom1.
> 
> The 32-bit domU shouldn't need 3.1 patches to run on 64-bit Xen.  Any older 
> domU kernel should work so long as it supports PAE.

I think there's a slight complication with that - any 32-bit PAE domU 
should work *provided* the Dom0 tools are new enough.

IIRC the XenD back-compat change to allow 32-bit guests earlier than Xen 3.1 
to work wasn't made in time for the 3.1 release. In particular you need to 
have changesets 15074 & 15075  - they should backport to 3.1 pretty easily

  changeset:   15074:5c7a1e3abd54
  user:        Ian Campbell <ian.campbell@xxxxxxxxxxxxx>
  date:        Tue May 15 17:54:48 2007 +0100
  files:       tools/libxc/xc_dom.h tools/libxc/xc_dom_x86.c 
tools/python/xen/lowlevel/xc/xc.c
  description:
  [BUILDER] Propagate the native protocol ABI for a guest out of the
  domain builder and in to python code.

  This knowledge will be useful to allow us to pre-seed the protocol
  field in a VBD entry in xenstore which will allow us to run older
  kernels in a 32on64 mixed environment.

  changeset:   15075:5efb46bfbcac
  user:        Ian Campbell <ian.campbell@xxxxxxxxxxxxx>
  date:        Tue May 15 19:00:48 2007 +0100
  files:       tools/python/xen/xend/XendDomainInfo.py 
tools/python/xen/xend/server/DevController.py
  description:
  [XEND] Write the default ABI to the xenstore entry for each frontend
  device.

  This allows to run older kernels in a 32on64 mixed environment.

Regards,
Dan.
-- 
|=- Red Hat, Engineering, Emerging Technologies, Boston.  +1 978 392 2496 -=|
|=-           Perl modules: http://search.cpan.org/~danberr/              -=|
|=-               Projects: http://freshmeat.net/~danielpb/               -=|
|=-  GnuPG: 7D3B9505   F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505  -=| 

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users