On 10/26/25 10:15 PM, BALATON Zoltan wrote:
On Sun, 26 Oct 2025, Yogesh Vyas wrote:
On 10/26/25 4:39 PM, BALATON Zoltan wrote:
On Sun, 26 Oct 2025, Yogesh Vyas wrote:
On Sun, Oct 19, 2025 at 5:37 PM BALATON Zoltan <[email protected]>
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.
That's odd, it works for me with QEMU master so I can't reproduce this.
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
The file command says 32-bit for both
/install/powerpc/vmlinuz-chrp.initrd and
/install/powerpc64/vmlinuz-chrp.initrd but only the first one should
work. Can you double check you have the right vmlinuz-chrp.initrd
file? But if you say the same file works with 9.2.4 I have no idea
why. I see these files on the CD
9301172 Jun 19 2018 /install/powerpc/vmlinuz-chrp.initrd
10534888 Jun 19 2018 /install/powerpc64/vmlinuz-chrp.initrd
I am also using the same file:
yogi@fedora:~/work/images$ ls -lrt vmlinuz-chrp.initrd
-r--r--r--. 1 yogi yogi 9301172 Oct 18 23:50 vmlinuz-chrp.initrd
File command says:
vmlinuz-chrp.initrd: ELF 32-bit MSB executable, PowerPC or cisco
4500, version 1 (SYSV), statically linked, not stripped
vmlinuz-chrp.initrd64: ELF 32-bit MSB executable, PowerPC or cisco
4500, version 1 (SYSV), statically linked, not stripped
but only the first from the powerpc directory is supposed to work
and it does boot for me with QEMU master. You can also check
following the other way described in
qemu/docs/system/ppc/amigang.rst using -bios pegasos2.rom which
loads the correct image from the CD. Does that work?
Yes, I had mentioned it in my first mail that ROM option works as
expected. It is only an issue when using VOF with upstream Qemu.
Or if you suspect it's a VOF issue you can try -trace enable="vof*"
Hi Balaton,
As suggested, I tried both options in upstream:
yogi@fedora:~/work/git/fork/qemu/build$ ./qemu-system-ppc -machine
pegasos2 -serial stdio -kernel ~/work/images/vmlinuz-chrp.initrd -append
"---" -cdrom ~/work/images/debian-8.11.0-powerpc-netinst.iso -d
guest_errors -trace enable="vof*"
I could see the below trace and the error message:
vof_getproplen ph=0x13 "subsystem-vendor-id" => len=4
vof_getprop ph=0x13 "subsystem-vendor-id" => len=4 [00001100]
vof_getproplen ph=0x13 "reg" => len=20
vof_getprop ph=0x13 "reg" => len=20 [00000000 00000000 00000000 00000000
00000000]
vof_write ih=0x2 [22] "Device tree strings 0x"
vof_write ih=0x2 [8] "01b0d000"
vof_write ih=0x2 [6] " -> 0x"
vof_write ih=0x2 [8] "01b0d405"
vof_write ih=0x2 [2] "
"
vof_write ih=0x2 [22] "Device tree struct 0x"
vof_write ih=0x2 [8] "01b0e000"
vof_write ih=0x2 [6] " -> 0x"
vof_write ih=0x2 [8] "01b0f000"
vof_write ih=0x2 [2] "
"
vof_getprop ph=0x3 "stdin" => len=4 [00000001]
vof_write ih=0x2 [18] "Calling quiesce..."
vof_write ih=0x2 [2] "
"
vof_claimed 0x0..0xd80 size=0xd80
vof_claimed 0x8000..0x10000 size=0x8000
vof_claimed 0x400000..0xcd8dfc size=0x8d8dfc
vof_claimed 0xd00000..0x15a1ec0 size=0x8a1ec0
vof_claimed 0x15a2000..0x1b0b90d size=0x56990d
vof_claimed 0x1b0c000..0x1c0c000 size=0x100000
vof_claimed 0x1ffff000..0x1ffff014 size=0x14
vof_write ih=0x2 [24] "returning from prom_init"
vof_write ih=0x2 [2] "
"
Trying to read invalid spr 1012 (0x3f4) at c0013f48
Regards,
Yogesh Vyas
Regards,
BALATON Zoltan
