[PATCH] powerpc/mm: Remove DEBUG_VM_PGTABLE support on ppc64

[Aneesh Kumar K.V]

On 9/1/20 1:40 PM, Christophe Leroy wrote:
> 
> 
> Le 01/09/2020 à 10:02, Aneesh Kumar K.V a écrit :
>> The test is broken w.r.t page table update rules and results in kernel
>> crash as below. Disable the support untill we get the tests updated.
>>
>>
>> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.ibm.com>
> 
> Any Fixes: tag ?
> 
>> ---
>>   arch/powerpc/Kconfig | 1 -
>>   1 file changed, 1 deletion(-)
>>
>> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
>> index 65bed1fdeaad..787e829b6f25 100644
>> --- a/arch/powerpc/Kconfig
>> +++ b/arch/powerpc/Kconfig
>> @@ -116,7 +116,6 @@ config PPC
>>       #
>>       select ARCH_32BIT_OFF_T if PPC32
>>       select ARCH_HAS_DEBUG_VIRTUAL
>> -    select ARCH_HAS_DEBUG_VM_PGTABLE
> 
> 
> You say you remove support for ppc64 but you are removing it for both 
> PPC64 and PPC32. Should you replace the line by:

Does it work on PPC32 with DEBUG_VM enabled? I was expecting it will be 
broken there too.

> 
>      select ARCH_HAS_DEBUG_VM_PGTABLE if PPC32
> 
>>       select ARCH_HAS_DEVMEM_IS_ALLOWED
>>       select ARCH_HAS_ELF_RANDOMIZE
>>       select ARCH_HAS_FORTIFY_SOURCE
>>
> 
> What about Documentation/features/debug/debug-vm-pgtable/arch-support.txt ?
> 

I am hoping we can enable the config once we resolve the test issues. 
may be in next merge window.

-aneesh