Re: domU guest for xcp 0.1.1

[Ritu kaur <ritu.kaur.us@gmail.com>]

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Thanks again. As I understand from wiki page, Jeremy's xen.git and
xen/stable code are for building dom0 kernel. Can dom0 kernel be used as a
domU? At least last time I checked I was told I cannot use it.

Thanks

On Sat, Mar 13, 2010 at 3:18 AM, Pasi Kärkkäinen <pasik@iki.fi> wrote:

> On Fri, Mar 12, 2010 at 05:51:20PM -0800, Ritu kaur wrote:
> >    Thanks Pasi. I looked at
> >    [1]http://wiki.xensource.com/xenwiki/XenParavirtOps(my<http://wiki.xensource.com/xenwiki/XenParavirtOps%28my>foray into linux is
> >    via xen, so please pardon by silly questions)
> >
> > Using Xen/paravirt_ops
> >
> >   Building with domU support
> >
> >     1. Get a current kernel. The latest [2]kernel.org kernel is
> generally a
> >        good choice.
> >     2. Configure as normal; you can start with your current .config file
> >     3. If building 32 bit kernel make sure you have CONFIG_X86_PAE
> enabled
> >        (which is set by selecting CONFIG_HIGHMEM64G)
> >
> >           * non-PAE mode doesn't work in 2.6.25, and has been dropped
> >             altogether from 2.6.26 and newer kernel versions.
> >
> >     4. Enable these core options:
> >
> >          1. CONFIG_PARAVIRT_GUEST
> >          2. CONFIG_XEN
> >
> >     5. And Xen pv device support
> >
> >          1. CONFIG_HVC_DRIVER and CONFIG_HVC_XEN
> >          2. CONFIG_XEN_BLKDEV_FRONTEND
> >          3. CONFIG_XEN_NETDEV_FRONTEND
> >
> >     6. And build as usual
> >
> >    Config doesn't have pcifront in it? don't I need it for pci
> passthrough? I
> >    have copied linux 2.6.33 source from [3]kernel.org and started
> building
> >    kernel(irrespective of above questions), but what distribution is this
> >    kernel associated with i.e I thought I should first install linux from
> a
> >    distribution and rebuild kernel for any modification, but in this case
> I
> >    don't understand what distribution this is associated with. Inputs
> much
> >    appreciated.
> >
>
> You need to check out Jeremy's xen.git, and possibly xen/stable branch from
> there,
> to have the pcifront driver. It's not yet in the upstream kernel.orgkernel.
>
> -- Pasi
>
> >    Thanks
> >
> >    On Fri, Mar 12, 2010 at 9:51 AM, Pasi Kärkkäinen <[4]pasik@iki.fi>
> wrote:
> >
> >      On Fri, Mar 12, 2010 at 09:10:31AM -0800, Ritu kaur wrote:
> >      >    Hi,
> >      >
> >      >    I am expanding my question to developers forum to get some
> quick
> >      help on
> >      >    pci passthrough. I am using xcp 0.1.1 as a dom0 and installed
> >      Debian Lenny
> >      >    as a domU(as mentioned in
> >      >    [1][5]http://wiki.xensource.com/xenwiki/Command_Line_Interface
> ).
> >      >    Unfortunately, Debian Lenny which the wiki points to doesn't
> come
> >      with PV
> >      >    drivers(I need pcifront driver). I looked up in
> >      [2][6]wiki.debian.org/Xen and
> >      >    I found following snippets
> >      >
> >      >    /***The default Lenny kernel is the newer paravirt_ops version
> >      (2.6.26),
> >      >    which does not function as a dom0 (except for the -xen
> variants,
> >      which
> >      >    have dom0 support but also some issues running as domU (please
> >      clarify?).
> >      >    It will also not support PCI passthrough in a domU. For PCI
> >      passthrough,
> >      >    you have to run the 2.6.18 etch kernel as both dom0 and domU.
> ***/
> >      >
> >
> >      I don't know if there are pre-packaged kernels for lenny with
> pcifront
> >      driver.
> >
> >      Links to kernel sources that have the pcifront driver:
> >
> >             - [7]http://xenbits.xen.org/linux-2.6.18-xen.hg
> >             - pv_ops xen.git xen/stable 2.6.32.9 and xen/master 2.6.31.6
> >               (See: [8]http://wiki.xensource.com/xenwiki/XenParavirtOps)
> >             - Kernels with the forward-ported Novell/opensuse Xen patches
> >      (2.6.29, 2.6.31, 2.6.33)
> >               (See: [9]http://wiki.xensource.com/xenwiki/XenDom0Kernels)
> >      >    Can someone let me know what domU has been tested with XCP
> 0.1.1
> >      for pci
> >      >    passthrough and any pointers to that domU kernel binary or
> source
> >      will
> >      >    help me out.
> >      >
> >
> >      Unfortunately I don't know what kernel has been tested.
> >      -- Pasi
> >
> > References
> >
> >    Visible links
> >    1. http://wiki.xensource.com/xenwiki/XenParavirtOps(my<http://wiki.xensource.com/xenwiki/XenParavirtOps%28my>
> >    2. http://kernel.org/
> >    3. http://kernel.org/
> >    4. mailto:pasik@iki.fi
> >    5. http://wiki.xensource.com/xenwiki/Command_Line_Interface
> >    6. http://wiki.debian.org/Xen
> >    7. http://xenbits.xen.org/linux-2.6.18-xen.hg
> >    8. http://wiki.xensource.com/xenwiki/XenParavirtOps
> >    9. http://wiki.xensource.com/xenwiki/XenDom0Kernels
>

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