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=-7.8 required=3.0 tests=DATE_IN_PAST_06_12, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED 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 2735BC43387 for ; Sat, 22 Dec 2018 17:02:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F40B521A48 for ; Sat, 22 Dec 2018 17:02:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392417AbeLVRBD (ORCPT ); Sat, 22 Dec 2018 12:01:03 -0500 Received: from ozlabs.org ([203.11.71.1]:44985 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726604AbeLVRBB (ORCPT ); Sat, 22 Dec 2018 12:01:01 -0500 Received: by ozlabs.org (Postfix, from userid 1034) id 43MLSR6WTrz9sDP; Sat, 22 Dec 2018 20:54:31 +1100 (AEDT) X-powerpc-patch-notification: thanks X-powerpc-patch-commit: 385e89d5b20f5a7c33fd7c1904da0e6a8e1b366f X-Patchwork-Hint: ignore In-Reply-To: <62fcfb8435c2f801d820eff469fd01e68c1b107d.1543425412.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: [v3] powerpc/mm: add exec protection on powerpc 603 Message-Id: <43MLSR6WTrz9sDP@ozlabs.org> Date: Sat, 22 Dec 2018 20:54:31 +1100 (AEDT) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2018-11-28 at 17:21:10 UTC, Christophe Leroy wrote: > The 603 doesn't have a HASH table, TLB misses are handled by > software. It is then possible to generate page fault when > _PAGE_EXEC is not set like in nohash/32. > > There is one "reserved" PTE bit available, this patch uses > it for _PAGE_EXEC. > > In order to support it, set_pte_filter() and > set_access_flags_filter() are made common, and the handling > is made dependent on MMU_FTR_HPTE_TABLE > > Signed-off-by: Christophe Leroy > Reviewed-by: Aneesh Kumar K.V Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/385e89d5b20f5a7c33fd7c1904da0e cheers