linux-kernel - Re: [PATCH] powerpc/chrp: Revert "Move PHB discovery" and "Make hydra

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Date:   Sat, 17 Jul 2021 09:14:38 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Oliver O'Halloran <oohall@...il.com>
Cc:     Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: Re: [PATCH] powerpc/chrp: Revert "Move PHB discovery" and "Make
 hydra_init() static"

On Sun, Jul 18, 2021 at 01:54:23AM +1000, Oliver O'Halloran wrote:
> On Sat, Jul 17, 2021 at 8:12 AM Guenter Roeck <linux@...ck-us.net> wrote:
> >
> > This patch reverts commit 407d418f2fd4 ("powerpc/chrp: Move PHB
> > discovery") and commit 9634afa67bfd ("powerpc/chrp: Make hydra_init()
> > static").
> >
> > Running the upstream kernel on Qemu's brand new "pegasos2" emulation
> > results in a variety of backtraces such as
> 
> ...and actually using it appears to require both manually enabling it
> in the qemu config and finding a random bios blob that is no longer
> distributed by the manufacturer. Cool.
> 
That is absolutely wrong. vof.bin provided by qemu in the linux root
directory works just fine, plus chrp32_defconfig minus SMP.

Guenter