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 B202BC54FCB for ; Sat, 25 Apr 2020 23:57:47 +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 690FC206BF for ; Sat, 25 Apr 2020 23:57:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 690FC206BF 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 498nzF4KKrzDqsC for ; Sun, 26 Apr 2020 09:57:45 +1000 (AEST) 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 498nqp1HS3zDqbp for ; Sun, 26 Apr 2020 09:51:18 +1000 (AEST) 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 498nqn4vzVz9sSh; Sun, 26 Apr 2020 09:51:17 +1000 (AEST) X-powerpc-patch-notification: thanks X-powerpc-patch-commit: b61c38baa98056d4802ff5be5cfb979efc2d0f7a In-Reply-To: <485caac75f195f18c11eb077b0031fdd2bb7fb9e.1587361039.git.christophe.leroy@c-s.fr> To: Christophe Leroy , Benjamin Herrenschmidt , Paul Mackerras From: Michael Ellerman Subject: Re: [PATCH v2] powerpc/8xx: Fix STRICT_KERNEL_RWX startup test failure Message-Id: <498nqn4vzVz9sSh@ozlabs.org> Date: Sun, 26 Apr 2020 09:51:17 +1000 (AEST) 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 Mon, 2020-04-20 at 05:37:42 UTC, Christophe Leroy wrote: > WRITE_RO lkdtm test works. > > But when selecting CONFIG_DEBUG_RODATA_TEST, the kernel reports > rodata_test: test data was not read only > > This is because when rodata test runs, there are still old entries > in TLB. > > Flush TLB after setting kernel pages RO or NX. > > Fixes: d5f17ee96447 ("powerpc/8xx: don't disable large TLBs with CONFIG_STRICT_KERNEL_RWX") > Cc: stable@vger.kernel.org > Signed-off-by: Christophe Leroy Applied to powerpc fixes, thanks. https://git.kernel.org/powerpc/c/b61c38baa98056d4802ff5be5cfb979efc2d0f7a cheers