From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailhub1.si.c-s.fr (pegase1.c-s.fr [93.17.236.30]) by lists.ozlabs.org (Postfix) with ESMTP id 2B3361A09D2 for ; Thu, 11 Dec 2014 05:01:16 +1100 (AEDT) From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras Subject: [PATCH 0/4] powerpc32: fix of PTE accessors and handle inverted HW bits via PTE accessors Message-Id: <20141210180028.72FA71A5D62@localhost.localdomain> Date: Wed, 10 Dec 2014 19:00:28 +0100 (CET) Cc: scottwood@freescale.com, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Some powerpc like the 8xx do invert some PTE bits in HW. In order to avoid having to invert the bits each time we set them into hardware, this patch adds the invertion logic into the PTE accessors in order to get them already properly inversed in the tables. Patchset: 1) powerpc32: misuse of accessors to pte_t objects 2) powerpc32: properly clear page table when 0 is not a good default PTE value 3) powerpc32: adds direct support to hardware inverted values in pte accessors 4) powerpc32/8xx: invert _PAGE_RW bit in PTE accessors All changes have been successfully tested on MPC885 Signed-off-by: Christophe Leroy Tested-by: Christophe Leroy --- arch/powerpc/include/asm/page.h | 8 +++---- arch/powerpc/include/asm/pgtable-ppc32.h | 37 +++++++++++++++++++++----------- arch/powerpc/include/asm/pgtable.h | 17 ++++++++------- arch/powerpc/include/asm/pte-8xx.h | 1 + arch/powerpc/include/asm/pte-common.h | 3 +++ arch/powerpc/kernel/head_8xx.S | 3 --- arch/powerpc/mm/pgtable_32.c | 14 ++++++++++++ 7 files changed, 56 insertions(+), 27 deletions(-)