Re: [Xen-devel] spawn second serial console/port

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Fri, 12 Nov 2010, Vasiliy G Tolstov wrote:
> On Fri, 2010-11-12 at 13:19 +0000, Stefano Stabellini wrote:
> > On Thu, 11 Nov 2010, Vasiliy G Tolstov wrote:
> > > I need second serial port (hvc1) how can i spawn it to connect from dom0
> > > to domU ?
> > > 
> > > Can it possible without modification of xen sources? Odes it possible to
> > > write something in config file of domU?
> > > 
> > > If it not possible to do without modification of source code, can You
> > > take me some info, what file/files i need to review?
> > > 
> > 
> > it is possible and most of the code is out there somewhere but it won't
> > work out of the box.
> > 
> > First you need yo checkout this branch:
> > 
> > git://xenbits.xen.org/people/sstabellini/linux-pvhvm.git 2.6.35-rc5-pvhvm-v7
> > 
> > give a look at 8d380069c8a00f89acb43f7c7b3a7fc4357a5cac and
> > 0d5aa905d52d960ca25f5adccec7fda9fd7e8a78, they implement PV multiconsole
> > support in the kernel (these commits are not upstream yet).
> > 
> > Then you need to edit xl to add a second PV console (it is not possible
> > to do that from the VM config file), a quick hack like this should work:
> > 
> > 
> > diff -r 388c44a63613 tools/libxl/xl_cmdimpl.c
> > --- a/tools/libxl/xl_cmdimpl.c      Wed Nov 10 14:56:06 2010 +0000
> > +++ b/tools/libxl/xl_cmdimpl.c      Fri Nov 12 13:17:24 2010 +0000
> > @@ -1686,13 +1686,17 @@ start:
> >  
> >          init_console_info(&console, 0, &state);
> >          console.domid = domid;
> > -        if (d_config.num_vfbs)
> > -             console.consback = LIBXL_CONSBACK_IOEMU;
> > +        console.consback = LIBXL_CONSBACK_IOEMU;
> >          libxl_device_console_add(&ctx, domid, &console);
> >          libxl_device_console_destroy(&console);
> >  
> > -        if (d_config.num_vfbs)
> > -            libxl_create_xenpv_qemu(&ctx, domid, d_config.vfbs, 
> > &dm_starting);
> > +        init_console_info(&console, 1, NULL);
> > +        console.domid = domid;
> > +        console.consback = LIBXL_CONSBACK_IOEMU;
> > +        libxl_device_console_add(&ctx, domid, &console);
> > +        libxl_device_console_destroy(&console);
> > +
> > +        libxl_create_xenpv_qemu(&ctx, domid, d_config.vfbs, &dm_starting);
> >      }
> >  
> >      if (dm_starting)
> > 
> > 
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel
> 
> 
> Sorry, but we use SLES =( 
> Can it possible to use without xl, for example with libxen ? (I can
> change the kernel, but change userspace is probably very hard to do...)
 
everything is possible, it just needs more work.

Of course you can install xl/libxenlight under SLES and use it to create
your domains. If you want to stick with the toolstack you have, then
you'll have to edit xend (xen-unstable.hg/tools/python/xen/xend), not a
very easy task.


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