Re: KVM compile fails on s390x

[Christian Borntraeger <borntraeger@de.ibm.com>]

Am Samstag, 2. August 2008 schrieb Robin Atwood:
> On Friday 01 Aug 2008, Christian Borntraeger wrote:
> > Am Donnerstag, 31. Juli 2008 schrieb Robin Atwood:
> > > I guess I am doing something very dumb, but when I try to compile kvm-72
> > > on z900 architecture (actually Hercules) I immediately get a compile
> > > error:
> > >
> > > zgentoo kvm-72 # ./configure --disable-gfx-check --disable-sdl
> >
> > Your userspace headers dont have all the necessary pieces...
> > You want to add --with-patched-kernel, that should trigger an headers_sync
> > to get the header files from the kernel.
> 
> The correct headers are now found but later into the compile I get:
> 
> In file included 
> from /var/tmp/portage/app-emulation/kvm-72/work/kvm-72/qemu/exec.c:41:
> /var/tmp/portage/app-emulation/kvm-72/work/kvm-72/qemu/tcg/tcg.h:24:24: 
error: 
> tcg-target.h: No such file or directory
> /var/tmp/portage/app-emulation/kvm-72/work/kvm-72/qemu/tcg/tcg.h:37:2: 
error: 
> #error unsupported
> <snip>
> make[2]: *** [exec.o] Error 1
> make[2]: Leaving directory 
> `/var/tmp/portage/app-emulation/kvm-72/work/kvm-72/qemu/i386-softmmu'
> make[1]: *** [subdir-i386-softmmu] Error 2
> make[1]: Leaving directory 
> `/var/tmp/portage/app-emulation/kvm-72/work/kvm-72/qemu'
> make: *** [qemu] Error 2
> 
> There is no tcg-target.h for the s390 arch but why is i386-softmmu being 
> compiled?

Yes. Expect further breakage in kvm-userspace on s390. At the moment libkvm is 
the only part of kvm-userspace that is finished. Anything else is not yet 
done.

At the moment you have to use kuli to start a guest.

If you start kuli with:
# kuli -k <yourguestkernel> -a "noinitrd"
you will get a booting kernel until the no device found panic message

you can use a file, disk or partition as a root device. If you have a copy of 
your distribution on lets say /dev/dasdb1 you can boot with:

# kuli -k /boot/image-<xxx> -a "initrd root=/dev/vda" \
-d file=/dev/dasdb1 -i /boot/initrd-<xxx>

Make sure to adopt the guest fstab to /dev/vda and so on.

Christian