From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754132AbaISIgO (ORCPT ); Fri, 19 Sep 2014 04:36:14 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:54389 "EHLO mailhub1.si.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751273AbaISIgJ (ORCPT ); Fri, 19 Sep 2014 04:36:09 -0400 From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras CC: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Joakim Tjernlund , scottwood@freescale.com Subject: [PATCH v4 00/21] powerpc/8xx: Optimise MMU TLB handling and add support of 16k pages Message-Id: <20140919083606.863ED1AB030@localhost.localdomain> Date: Fri, 19 Sep 2014 10:36:06 +0200 (CEST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patchset: 1) provides several MMU TLB handling optimisation on MPC8xx. 2) adds support of 16k pages on MPC8xx. All changes have been successfully tested on a custom board equipped with MPC885 Signed-off-by: Christophe Leroy Tested-by: Christophe Leroy --- Changes in v2: - Patch number 10 removed, it was implementing a 16 bit alignment of the PGDIR. It is not worth potentially wasting up to 64k of memory just for removing one instruction (ori). - Preserve r11 while calculating the level 2 address, therefore no more need to save r11 into CR. Changes in v3: - Few fixes following review from Joachim Tjernlund - Removed the major hack which was saving resisters in memory for CPU6 errata - Invalidating non present TLB entries earlier (in head_8xx instead of fault.c) Changes in v4: - Resubmitting patch 3 and 7 after new comments from Joachim and feedback from Scott. Has impact on patch 5, 14, 19 and 21. - Fixed patch 20 that didn't apply arch/powerpc/Kconfig | 2 +- arch/powerpc/include/asm/mmu-8xx.h | 2 + arch/powerpc/include/asm/pgtable-ppc32.h | 20 ++ arch/powerpc/include/asm/pte-8xx.h | 7 +- arch/powerpc/include/asm/reg.h | 3 +- arch/powerpc/kernel/head_8xx.S | 366 ++++++++++++------------- arch/powerpc/mm/fault.c | 7 - 7 files changed, 201 insertions(+), 206 deletions(-)