Messages in this thread | | | Subject | Re: [PATCH v5 13/16] powerpc/mm/32s: Use BATs for STRICT_KERNEL_RWX | From | christophe leroy <> | Date | Sun, 16 Jun 2019 10:01:10 +0200 |
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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
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