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)
>
>
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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...)
--
Vasiliy G Tolstov <v.tolstov@xxxxxxxxx>
Selfip.Ru
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