From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1039593AbdDUNCI (ORCPT ); Fri, 21 Apr 2017 09:02:08 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:33241 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1039574AbdDUNCD (ORCPT ); Fri, 21 Apr 2017 09:02:03 -0400 Message-Id: From: Christophe Leroy Subject: [PATCH v2 0/3] powerpc/mm: Fix kernel protection and implement CONFIG_DEBUG_RODATA on PPC32 To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Scott Wood Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Date: Fri, 21 Apr 2017 15:02:01 +0200 (CEST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch set implements CONFIG_DEBUG_RODATA on Powerpc32 after fixing a few issues related to kernel code page protection. Changes in v2: Instead of making the entire kernel RW to patch code in ftrace, we now only change the rights on the page to be modified Christophe Leroy (3): powerpc/mm: Ensure change_page_attr() doesn't invalidate pinned TLBs powerpc/mm: Fix kernel RAM protection after freeing unused memory on PPC32 powerpc/mm: Implement CONFIG_DEBUG_RODATA on PPC32 arch/powerpc/Kconfig.debug | 11 +++++++ arch/powerpc/include/asm/pgtable.h | 8 ++++++ arch/powerpc/kernel/ftrace.c | 8 ++++-- arch/powerpc/mm/init_32.c | 3 +- arch/powerpc/mm/mem.c | 1 + arch/powerpc/mm/mmu_decl.h | 3 ++ arch/powerpc/mm/pgtable_32.c | 59 +++++++++++++++++++++++++++++++++----- 7 files changed, 82 insertions(+), 11 deletions(-) -- 2.12.0