Re: Linux kernel image for powerpc 64 endian less not booting

[Oscar Carter]

Hi Greg,

On Mon, Aug 03, 2020 at 10:22:21AM +0200, Greg Kurz wrote:
> On Sat, 1 Aug 2020 15:41:30 +0200
> Oscar Carter <oscar.carter@gmx.com> wrote:
>
> > Hi,
> >
> > I'm working in a new feature for the powerpc architecture in the linux 
> > kernel.
> > I'm a newbie in the kernel and with the qemu. So, I will explain my probem.
> >
> > I've compiled the kernel with a default configuration and the set to NO the
> > CONFIG_KEXEC option with the nconfig (I've do this because googling I've
> > found that for someone resolves the problem).
> >
> > When I try to boot this kernel with qemu I obtained the following:
> >
> > ubuntu@ubuntu:~/Documents$ qemu-system-ppc -kernel 
> > /media/ubuntu/Data/linux/arch/powerpc/boot/zImage -append "root=/dev/sda 
> > console=ttyS0" -drive file=qemu_image.img,index=0,media=disk,format=raw 
> > --nographic
> >
>
> Hi,
>
> You should use qemu-system-ppc64 to run 64-bit guests.
>
Thank you very much for your help. I've tested this and now the boot stops
with an exception.

I've tested this with the qemu version 4.2 (ubuntu 20.04) and with the qemu
version:

QEMU emulator version 5.0.93 (v5.1.0-rc3-dirty)
Copyright (c) 2003-2020 Fabrice Bellard and the QEMU Project developers

building from sources. In both cases the stop point and exception is the
same:

To run qemu:

qemu-system-ppc64 -kernel /media/ubuntu/Data/linux/arch/powerpc/boot/zImage 
-append "root=/dev/sda console=ttyS0" -drive 
file=qemu_image.img,index=0,media=disk,format=raw --nographic

The output:

SLOF **********************************************************************
QEMU Starting
 Build Date = Jul 17 2020 11:15:24
 FW Version = git-e18ddad8516ff2cf
 Press "s" to enter Open Firmware.

Populating /vdevice methods
Populating /vdevice/vty@71000000
Populating /vdevice/nvram@71000001
Populating /vdevice/l-lan@71000002
Populating /vdevice/v-scsi@71000003
       SCSI: Looking for devices
          8000000000000000 DISK     : "QEMU     QEMU HARDDISK    2.5+"
          8200000000000000 CD-ROM   : "QEMU     QEMU CD-ROM      2.5+"
Populating /pci@800000020000000
                     00 0000 (D) : 1234 1111    qemu vga
                     00 0800 (D) : 1033 0194    serial bus [ usb-xhci ]
No NVRAM common partition, re-initializing...
Installing QEMU fb



Scanning USB
  XHCI: Initializing
    USB Keyboard
    USB mouse
No console specified using screen & keyboard
Detected RAM kernel at 400000 (9085d8 bytes)

  Welcome to Open Firmware

  Copyright (c) 2004, 2017 IBM Corporation All rights reserved.
  This program and the accompanying materials are made available
  under the terms of the BSD License available at
  http://www.opensource.org/licenses/bsd-license.php

Booting from memory...


( 700 ) Program Exception [ 1dbf04c4 ]


    R0 .. R7           R8 .. R15         R16 .. R23         R24 .. R31
8000000000002000   000000001e47d200   0000000000000000   0000000000000000
000000001dc76000   8000000000000000   0000000000000000   0000000000000000
0000000000000000   000000001e47c010   0000000000000000   0000000000000000
0000000000000000   0000000000000030   0000000000000000   0000000000000000
0000000000000000   000000000000005b   0000000000000000   0000000000000000
000000001dbf04c4   0000000000000000   0000000000000000   0000000000000000
0000000000000000   0000000000000000   0000000000000000   0000000000000000
0000000000000000   0000000000000000   0000000000000000   0000000000000000

    CR / XER           LR / CTR          SRR0 / SRR1        DAR / DSISR
        80000000   000000001dbf04f0   0000000000400000   0000000000000000
0000000020040000   0000000000400000   8000000000082000           00000000


2 > QEMU: Terminated

I don't know what's happening now. What am I doing wrong?

Thanks in advance.

Oscar Carter