Re: [PATCH v5 13/16] powerpc/mm/32s: Use BATs for STRICT_KERNEL_RWX
From: christophe leroy <hidden>
Date: 2019-06-16 08:21:21
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Le 15/06/2019 à 14:28, Andreas Schwab a écrit :
On Feb 21 2019, Christophe Leroy [off-list ref] wrote:quoted
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