* Manoj Srivastava
> I would be happy to add support, but I do not use Xen, and I
> can't test it. If you could tell me how you build Xen images manually
> (without kernel-package, just with the KConfig build system), and any
> suggestions on how one could distinguish between a normal i386 build
> and otherwise, I'll see what I can do to provide you with
> functionality for you to test.
Hi Manoj. The only difference is that the generated kernel image is
found in /usr/src/linux/vmlinuz instead of in
/usr/src/linux/arch/i386/boot/bzImage. This is probably only because
the kernel image doesn't need a boot sector, it's the Xen hypervisor
(which isn't Linux at all) that are actually booted from Grub; the
kernel image itself is in turn executed/booted from the Xen hypervisor,
which has already done all the nasty stuff (bringing the CPU into
protected mode, enabling additional CPUs, etc).
Anyway, when I run make-kpkg I see that it attempts to do make the
bzImage target, which is just a stub when CONFIG_X86_XEN=y is set, and
does nothing (successfully). What is necessary is to make the vmlinuz
target (or vmlinux for that matter), which will create the kernel
image. When I build the kernels I actually use make-kpkg, but I build
vmlinuz manually and then fool make-kpkg a bit with a symlink from
bzImage. My small script for doing so is like this:
REV=`date "+%Y%m%d"`
make vmlinuz EXTRAVERSION=-xen$REV
ln -sf ../../../vmlinuz arch/i386/boot/bzImage
make-kpkg --initrd --rootcmd fakeroot --revision $REV --append-to-version
-xen$REV --stem linux kernel_image
...which builds a linux-image.deb which works perfectly. So it's just
a matter of figuring out when to use vmlinuz instead of bzImage. Maybe
just grepping for CONFIG_X86_XEN=y in .config is adequate, but I don't
think that will work with ia64 or x86_64 and I would assume you want a
generic solution. Maybe simply a --use-vmlinuz-instead-of-bzImage
command line option would suffice.
In case you want to play around with this yourself and haven't used
Mercurial before I'll include an ultra-concise guide to getting the
Xen-as-subarch source tree here:
apt-get install mercurial
mkdir /usr/src/linux-2.6-xen
cd /usr/src/linux-2.6-xen
hg init .
echo $'[paths]\ndefault = http://xenbits.xensource.com/linux-2.6-xen.hg' >
.hg/hgrc
hg pull -u
Kind regards
--
Tore Anderson
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