lkml.org 
[lkml]   [2019]   [Jun]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v5 13/16] powerpc/mm/32s: Use BATs for STRICT_KERNEL_RWX
From
Date


Le 15/06/2019 à 14:28, Andreas Schwab a écrit :
> On Feb 21 2019, Christophe Leroy <christophe.leroy@c-s.fr> wrote:
>
>> diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
>> index a000768a5cc9..6e56a6240bfa 100644
>> --- a/arch/powerpc/mm/pgtable_32.c
>> +++ b/arch/powerpc/mm/pgtable_32.c
>> @@ -353,7 +353,10 @@ void mark_initmem_nx(void)
>> unsigned long numpages = PFN_UP((unsigned long)_einittext) -
>> PFN_DOWN((unsigned long)_sinittext);
>>
>> - change_page_attr(page, numpages, PAGE_KERNEL);
>> + if (v_block_mapped((unsigned long)_stext) + 1)
>
> That is always true.
>

Did you boot with 'nobats' kernel parameter ?

If not, that's normal to be true, it means that memory is mapped with BATs.

When you boot with 'nobats' parameter, this should return false.

Christophe

---
L'absence de virus dans ce courrier électronique a été vérifiée par le logiciel antivirus Avast.
https://www.avast.com/antivirus

\
 
 \ /
  Last update: 2019-06-16 10:23    [W:0.096 / U:2.492 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site