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

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Date:   Sun, 13 Jan 2019 20:43:07 +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 19:16, Jonathan Neuschäfer a écrit :
> On Thu, Jan 10, 2019 at 03:11:38PM +0000, Christophe Leroy wrote:
>> The purpose of this serie is to:
>> - use BATs with STRICT_KERNEL_RWX on book3s (See patch 12 for details.)
>> - use LTLBs with STRICT_KERNEL_RWX on 8xx (See patch 14 for a few details.)
> 
> Hi,
> 
> 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 ?

Thanks
Christophe

> 
>> top of MEM2 @ 13F00000
>>
>> zImage starting: loaded at 0x01000000 (sp: 0x0178afa0)
>> Allocating 0x166b2c8 bytes for kernel...
>> Decompressing (0x00000000 <- 0x01011000:0x01788398)...
>> Done! Decompressed 0xf421f4 bytes
>>
>> Linux/PowerPC load: root=/dev/mmcblk0p2 rootwait console=usbgecko1
>> Finalizing device tree... flat tree at 0x178b7a0
>> [    0.000000] printk: bootconsole [udbg0] enabled
>> [    0.000000] Kernel panic - not syncing: ERROR: Failed to allocate 0x00100000 bytes below 0x00000000.
>> [    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 5.0.0-rc1-wii-00038-g335347fa417f #1337
>> [    0.000000] Call Trace:
>> [    0.000000] [c0f1ff30] [c00280f0] panic+0x144/0x324 (unreliable)
>> [    0.000000] [c0f1ff90] [c0c18a34] memblock_alloc_base+0x34/0x44
>> [    0.000000] [c0f1ffa0] [c0c071e0] MMU_init_hw+0xcc/0x300
>> [    0.000000] [c0f1ffd0] [c0c06554] MMU_init+0x12c/0x198
>> [    0.000000] [c0f1fff0] [c0003418] start_here+0x40/0x78
>> [    0.000000] Rebooting in 180 seconds..
> 
> 
> Jonathan
>