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 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.org kernel.
-- Pasi
> Thanks
>
> On Fri, Mar 12, 2010 at 9:51 AM, Pasi Kärkkäinen <[4]
pasik@xxxxxx> 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
> > 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
> 2. http://kernel.org/
> 3. http://kernel.org/
> 4. mailto:pasik@xxxxxx
> 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
