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=-8.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 A1C8CC34050 for ; Wed, 19 Feb 2020 12:40:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 83EF524654 for ; Wed, 19 Feb 2020 12:40:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727827AbgBSMkB (ORCPT ); Wed, 19 Feb 2020 07:40:01 -0500 Received: from ozlabs.org ([203.11.71.1]:40389 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727780AbgBSMj7 (ORCPT ); Wed, 19 Feb 2020 07:39:59 -0500 Received: by ozlabs.org (Postfix, from userid 1034) id 48My3d1z1Vz9sST; Wed, 19 Feb 2020 23:39:55 +1100 (AEDT) X-powerpc-patch-notification: thanks X-powerpc-patch-commit: a4031afb9d10d97f4d0285844abbc0ab04245304 In-Reply-To: <4f70c2778163affce8508a210f65d140e84524b4.1581272050.git.christophe.leroy@c-s.fr> 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/8xx: Fix clearing of bits 20-23 in ITLB miss Message-Id: <48My3d1z1Vz9sST@ozlabs.org> Date: Wed, 19 Feb 2020 23:39:55 +1100 (AEDT) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 2020-02-09 at 18:14:42 UTC, Christophe Leroy wrote: > In ITLB miss handled the line supposed to clear bits 20-23 on the > L2 ITLB entry is buggy and does indeed nothing, leading to undefined > value which could allow execution when it shouldn't. > > Properly do the clearing with the relevant instruction. > > Fixes: 74fabcadfd43 ("powerpc/8xx: don't use r12/SPRN_SPRG_SCRATCH2 in TLB Miss handlers") > Cc: stable@vger.kernel.org > Signed-off-by: Christophe Leroy Applied to powerpc fixes, thanks. https://git.kernel.org/powerpc/c/a4031afb9d10d97f4d0285844abbc0ab04245304 cheers