Re: [PATCH v3 00/13] Pegasos2 clean up and pegasos1 emulation

[Yogesh Vyas <yvyas1991@gmail.com>]

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On Sun, Oct 19, 2025 at 5:37 PM BALATON Zoltan <balaton@eik.bme.hu> wrote:

> On Sun, 19 Oct 2025, Yogesh Vyas wrote:
> > When I run QEMU with the ROM option, the machine boots successfully with
> > the below command:
> >
> > qemu-system-ppc64 -machine pegasos2 -bios pegasos2.rom \
> >                  -cdrom debian-8.11.0-powerpc-netinst.iso \
> >                  -device VGA,romfile="" -serial stdio
> >
> > However, when I try to boot the machine without the ROM using VOF, the
> > machine does not come up and no logs appear on stdout:
> >
> > qemu-system-ppc64 -machine pegasos2 -serial stdio \
> >                  -kernel vmlinuz-chrp.initrd -append "---" \
> >                  -cdrom debian-8.11.0-powerpc-netinst.iso
> >
> > Please let me know if I am missing any parameters or setup required for
> > booting via VOF on Pegasos2.
> >
> > Documentation referred: qemu/docs/system/ppc/amigang.rst
>
> Maybe you did not use the right vmlinuz-chrp.initrd. Pegasos2 is a 32 bit
> machine so you need /install/powerpc/vmlinuz-chrp.initrd for it (see in
> the /install/pegasos script that is used with firmware). Even if you call
> it from qemu-system-ppc64 which includes both 32 bit and 64 bit machines
> but does not make 32 bit machines 64 bit so you still need the 32 bit OS.
>
>
Hi Balaton,
I am using 32bit images only and looks like VOF boot works with the distro
provided Qemu (both ppc and pp64), however doesn't work with upstream Qemu
for VOF.

yogi@fedora:~/work/images$ file vmlinuz-chrp.initrd
vmlinuz-chrp.initrd: ELF 32-bit MSB executable, PowerPC or cisco 4500,
version 1 (SYSV), statically linked, not stripped

yogi@fedora:~/work/images$ file debian-8.11.0-powerpc-netinst.iso
debian-8.11.0-powerpc-netinst.iso: ISO 9660 CD-ROM filesystem data (DOS/MBR
boot sector) 'Debian 8.11.0 ppc 1'

Qemu distro version:
yogi@fedora:~/work/images$ qemu-system-ppc --version
QEMU emulator version 9.2.4 (qemu-9.2.4-2.fc42)
Copyright (c) 2003-2024 Fabrice Bellard and the QEMU Project developers
yogi@fedora:~/work/images$ qemu-system-ppc64 --version
QEMU emulator version 9.2.4 (qemu-9.2.4-2.fc42)
Copyright (c) 2003-2024 Fabrice Bellard and the QEMU Project developers

When using upstream Qemu (both ppc and pp64) with VOF it just gets stuck
with no console output. Am I missing something?

I also tried applying the patches from
https://lore.kernel.org/qemu-devel/cover.1761346145.git.balaton@eik.bme.hu/T/#t
but still the same issue.

Regards,
Yogesh



> Regards,
> BALATON Zoltan
>

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