linux-kernel - Re: Regression in 5.1.0-rc2: PowerBook G4 Aluminum fails to boot

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Date:   Mon, 25 Mar 2019 10:54:25 -0500
From:   Larry Finger <Larry.Finger@...inger.net>
To:     Christophe Leroy <christophe.leroy@....fr>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        ppc-dev <linuxppc-dev@...ts.ozlabs.org>
Cc:     LKML <linux-kernel@...r.kernel.org>
Subject: Re: Regression in 5.1.0-rc2: PowerBook G4 Aluminum fails to boot -
 bisected to commit 0df977eafc792

On 3/25/19 1:53 AM, Christophe Leroy wrote:
> 
> 
> Le 25/03/2019 à 01:49, Larry Finger a écrit :
>> A build of kernel 5.1.0-rc2 resulted in a failure to boot on my PowerBook G4 
>> Aluminum. The bootstrap loads the initial kernel and issues the appropriate 
>> start, but the machine hangs at that point.
> 
> Can you please be more explicit ? What do you mean by "issues the appropriate 
> start" ? What is "that point" ? Any messages on the console ?

Sorry to be unclear. The bootstrap code prints a line saying "Booting Linux via 
__start() @ 0x00c00000" and then hangs.

Your idea of confusion between physical and virtual address sounds right. I am 
building a kernel with that patch applied now. As it seems to be going quickly, 
I should have the answer fairly quickly.

Thanks,

Larry