From: Michael Ellerman <mpe@ellerman.id.au>
To: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
tuxayo <victor@tuxayo.net>
Cc: debian-powerpc@lists.debian.org,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
Claudia Neumann <dr.claudia.neumann@gmx.de>
Subject: Re: Boot failure with ppc64 port on iMacs G5
Date: Fri, 01 Mar 2024 12:56:39 +1100 [thread overview]
Message-ID: <87frxag1ew.fsf@mail.lhotse> (raw)
In-Reply-To: <be7a1a66e9cc4789704d2c93f0b770ea391a4c28.camel@physik.fu-berlin.de>
John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> writes:
> Hi Michael,
>
> On Thu, 2024-02-29 at 17:42 +1100, Michael Ellerman wrote:
>> > There seems to be a regression in the kernel which affects PowerPC 970 machines,
>> > i.e. PowerMac G5 CPUs. The issue needs to be bisected and reported upstream.
>>
>> I have a quad G5 that is booting mainline happily.
>
> it's a really tricky problem because it seems to depend on how the kernel image
> is booted.
>
> It fails when trying to boot the kernel off the installation CD, i.e. like from here:
>
>> https://cdimage.debian.org/cdimage/ports/snapshots/2024-02-25/debian-12.0.0-ppc64-NETINST-1.iso
>
> but the kernel will boot fine when installing in an existing system which was installed
> with an installation CD which uses an older kernel.
>
>> https://cdimage.debian.org/cdimage/ports/snapshots/2023-06-18/debian-12.0.0-ppc64-NETINST-1.iso
>
> I have not really figured out yet what the problem is.
OK.
That second iso boots OK for me in qemu. It boots grub and then the
kernel loads and shows:
Loading ...
OF stdout device is: /pci@f0000000/mac-io@c/escc@13000/ch-a@13020
Preparing to boot Linux version 6.3.0-1-powerpc64 (debian-kernel@lists.debian.org) (gcc-12 (Debian 12.3.0-2) 12.3.0, GNU ld (GNU Binutils for Debian) 2.40) #1 SMP Debian 6.3.7-1 (2023-06-12)
Detected machine type: 0000000000000400
command line: BOOT_IMAGE=/install/vmlinux --- quiet
memory layout at init:
memory_limit : 0000000000000000 (16 MB aligned)
alloc_bottom : 0000000005e70000
alloc_top : 0000000030000000
alloc_top_hi : 0000000080000000
rmo_top : 0000000030000000
ram_top : 0000000080000000
copying OF device tree...
Building dt strings...
Building dt structure...
Device tree strings 0x0000000005e80000 -> 0x0000000005e80560
Device tree struct 0x0000000005e90000 -> 0x0000000005ea0000
Quiescing Open Firmware ...
Booting Linux via __start() @ 0x0000000002000000 ...
Hello World !
smp_core99_probe
smp_core99_bringup_done
Starting system log daemon: syslogd, klogd.
And eventually starts the installer.
That's using no VGA, so possibly there's something wrong with the video
setup on real hardware:
$ qemu-system-ppc64 -nographic -vga none -M mac99,via=pmu -smp 1 -m 2G -nic user -drive file=$HOME/debian-12.0.0-ppc64-NETINST-1.2023-06-18.iso,format=raw,media=cdrom -boot d
I'll try and find time to test it on my actual G5 next week when I'm in
the office.
cheers
next prev parent reply other threads:[~2024-03-01 1:57 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <fc93d03b-581d-40cd-8ab1-762a9ee2c20c@tuxayo.net>
2024-02-20 9:16 ` Boot failure with ppc64 port on iMacs G5 John Paul Adrian Glaubitz
2024-02-28 5:23 ` tuxayo
2024-02-29 6:42 ` Michael Ellerman
2024-02-29 8:14 ` John Paul Adrian Glaubitz
2024-03-01 1:56 ` Michael Ellerman [this message]
2024-03-01 14:47 ` John Paul Adrian Glaubitz
2024-03-01 22:06 ` Brad Boyer
2024-03-06 1:57 ` Michael Ellerman
2024-03-28 10:00 ` John Paul Adrian Glaubitz
2024-05-11 13:27 ` John Paul Adrian Glaubitz
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