linux-kernel - Re: [PATCH v2 00/15] powerpc/32s: Use BATs/LTLBs for STRICT_KERNEL

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Message-ID: <334b1b02-b652-499c-904e-09e6f7164b8c@c-s.fr>
Date:   Mon, 14 Jan 2019 19:23:07 +0100
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Jonathan Neuschäfer <j.neuschaefer@....net>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v2 00/15] powerpc/32s: Use BATs/LTLBs for
 STRICT_KERNEL_RWX



Le 13/01/2019 à 22:02, Jonathan Neuschäfer a écrit :
> On Sun, Jan 13, 2019 at 08:43:07PM +0100, Christophe Leroy wrote:
>> Le 13/01/2019 à 19:16, Jonathan Neuschäfer a écrit :
>>> I just tested the whole series on my Wii (I didn't test any intermediate
>>> steps). Without CONFIG_STRICT_KERNEL_RWX, it seems to work fine, but
>>> with it, I get the following error while booting:
>>
>> Argh !
>>
>> Can you please send the System.map file generated at compile time ?
> 
> Here:
>    https://gist.githubusercontent.com/neuschaefer/12ccc87ff8aeff543fad558e8742cd2b/raw/d49d321709cac364779e6893bbd91ff5a80bcb03/System.map
> 
> And here's the config, reduced with 'make savedefconfig':
>    https://gist.githubusercontent.com/neuschaefer/12ccc87ff8aeff543fad558e8742cd2b/raw/d49d321709cac364779e6893bbd91ff5a80bcb03/config
> 
> The exact code I used is here:
>    https://github.com/neuschaefer/linux/tree/ppcbat-test

Thanks

I can't see anything special in your setup, and this failure looks 
rather unexpected because I can't see anything done that early when 
CONFIG_STRICT_KERNEL_RWX is selected.

Does CONFIG_STRICT_KERNEL_RWX works properly without my serie ?

Christophe

> 
> 
> Thanks,
> Jonathan
>