Re: [PATCH] powerpc/32s: fix initial setup of segment registers on secondary CPU
From: Michael Ellerman
Date: Tue Jun 18 2019 - 08:36:38 EST
Christophe Leroy <christophe.leroy@xxxxxx> writes:
> Le 11/06/2019 Ã 17:47, Christophe Leroy a ÃcritÂ:
>> The patch referenced below moved the loading of segment registers
>> out of load_up_mmu() in order to do it earlier in the boot sequence.
>> However, the secondary CPU still needs it to be done when loading up
>> the MMU.
>> Reported-by: Erhard F. <erhard_f@xxxxxxxxxxx>
>> Fixes: 215b823707ce ("powerpc/32s: set up an early static hash table for KASAN")
> Cc: stable@xxxxxxxxxxxxxxx
Sorry patchwork didn't pick that up and I missed it. The AUTOSEL bot
will probably pick it up anyway though.
>> diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
>> index 1d5f1bd0dacd..f255e22184b4 100644
>> --- a/arch/powerpc/kernel/head_32.S
>> +++ b/arch/powerpc/kernel/head_32.S
>> @@ -752,6 +752,7 @@ __secondary_start:
>> stw r0,0(r3)
>> /* load up the MMU */
>> + bl load_segment_registers
>> bl load_up_mmu
>> /* ptr to phys current thread */