From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6418FC432C0 for ; Mon, 25 Nov 2019 10:47:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4560D2085B for ; Mon, 25 Nov 2019 10:47:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727811AbfKYKrC (ORCPT ); Mon, 25 Nov 2019 05:47:02 -0500 Received: from bilbo.ozlabs.org ([203.11.71.1]:42503 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727710AbfKYKrA (ORCPT ); Mon, 25 Nov 2019 05:47:00 -0500 Received: by ozlabs.org (Postfix, from userid 1034) id 47M3cy2crzz9sR1; Mon, 25 Nov 2019 21:46:58 +1100 (AEDT) X-powerpc-patch-notification: thanks X-powerpc-patch-commit: a2227a27774328507a5c2335a6dd600c079d1ff5 In-Reply-To: To: Christophe Leroy , Benjamin Herrenschmidt , Paul Mackerras From: Michael Ellerman Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] powerpc/32: Don't populate page tables for block mapped pages except on the 8xx. Message-Id: <47M3cy2crzz9sR1@ozlabs.org> Date: Mon, 25 Nov 2019 21:46:58 +1100 (AEDT) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2019-08-23 at 09:56:21 UTC, Christophe Leroy wrote: > Commit d2f15e0979ee ("powerpc/32: always populate page tables for > Abatron BDI.") wrongly sets page tables for any PPC32 for using BDI, > and does't update them after init (remove RX on init section, set > text and rodata read-only) > > Only the 8xx requires page tables to be populated for using the BDI. > They also need to be populated in order to see the mappings in > /sys/kernel/debug/kernel_page_tables > > On BOOK3S_32, pages that are not mapped by page tables are mapped > by BATs. The BDI knows BATs and they can be viewed in > /sys/kernel/debug/powerpc/block_address_translation > > Only set pagetables for RAM and IMMR on the 8xx and properly update > them at the end of init. > > Signed-off-by: Christophe Leroy Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/a2227a27774328507a5c2335a6dd600c079d1ff5 cheers