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=unavailable 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 857CEC432C0 for ; Mon, 25 Nov 2019 10:56:14 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3FD50207FD for ; Mon, 25 Nov 2019 10:56:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3FD50207FD Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 47M3qb6yqrzDqNR for ; Mon, 25 Nov 2019 21:56:11 +1100 (AEDT) Received: from ozlabs.org (bilbo.ozlabs.org [IPv6:2401:3900:2:1::2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 47M3cy3pmQzDqVv for ; Mon, 25 Nov 2019 21:46:58 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au 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 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) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" 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