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Date: Fri, 30 Oct 2020 14:00:47 +0100
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From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Andreas Schwab <schwab@linux-m68k.org>
Subject: Re: [PATCH] powerpc/32s: Setup the early hash table at all time.
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Cc: Paul Mackerras <paulus@samba.org>, linuxppc-dev@lists.ozlabs.org,
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Andreas Schwab <schwab@linux-m68k.org> a =C3=A9crit=C2=A0:

> On Okt 30 2020, Michael Ellerman wrote:
>
>> Andreas Schwab <schwab@linux-m68k.org> writes:
>>> On Okt 01 2020, Christophe Leroy wrote:
>>>
>>>> At the time being, an early hash table is set up when
>>>> CONFIG_KASAN is selected.
>>>>
>>>> There is nothing wrong with setting such an early hash table
>>>> all the time, even if it is not used. This is a statically
>>>> allocated 256 kB table which lies in the init data section.
>>>>
>>>> This makes the code simpler and may in the future allow to
>>>> setup early IO mappings with fixmap instead of hard coding BATs.
>>>>
>>>> Put create_hpte() and flush_hash_pages() in the .ref.text section
>>>> in order to avoid warning for the reference to early_hash[]. This
>>>> reference is removed by MMU_init_hw_patch() before init memory is
>>>> freed.
>>>
>>> This breaks booting on the iBook G4.
>>
>> Do you get an oops or anything?
>
> Nope, nothing at all.
>

Under qemu it was working.

Can you share your .config, or are you using one of the defconfig ?

Christophe