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=-8.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,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 5A95EC43387 for ; Sat, 22 Dec 2018 10:00:51 +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 0860021A47 for ; Sat, 22 Dec 2018 10:00:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0860021A47 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 43MLbj0HbYzDqXl for ; Sat, 22 Dec 2018 21:00:49 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Received: from ozlabs.org (bilbo.ozlabs.org [203.11.71.1]) (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 43MLSS1rglzDqT3 for ; Sat, 22 Dec 2018 20:54:32 +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 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 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) 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 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