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=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS 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 7FCCFC48BDF for ; Fri, 18 Jun 2021 04:23:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 69C486117A for ; Fri, 18 Jun 2021 04:23:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231881AbhFREZL (ORCPT ); Fri, 18 Jun 2021 00:25:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50610 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231289AbhFREY6 (ORCPT ); Fri, 18 Jun 2021 00:24:58 -0400 Received: from ozlabs.org (bilbo.ozlabs.org [IPv6:2401:3900:2:1::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D77BCC061574 for ; Thu, 17 Jun 2021 21:22:49 -0700 (PDT) Received: by ozlabs.org (Postfix, from userid 1034) id 4G5m472Xzhz9sXL; Fri, 18 Jun 2021 14:22:47 +1000 (AEST) From: Michael Ellerman To: Paul Mackerras , Michael Ellerman , Benjamin Herrenschmidt , Christophe Leroy Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org In-Reply-To: <169310e08152aa1d96c979770291d165ec6896ae.1622616032.git.christophe.leroy@csgroup.eu> References: <169310e08152aa1d96c979770291d165ec6896ae.1622616032.git.christophe.leroy@csgroup.eu> Subject: Re: [PATCH] powerpc/44x: Implement Kernel Userspace Exec Protection (KUEP) Message-Id: <162398829401.1363949.16143408531538336640.b4-ty@ellerman.id.au> Date: Fri, 18 Jun 2021 13:51:34 +1000 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2 Jun 2021 06:42:10 +0000 (UTC), Christophe Leroy wrote: > Powerpc 44x has two bits for exec protection in TLBs: one > for user (UX) and one for superviser (SX). > > Clear SX on user pages in TLB miss handlers to provide KUEP. Applied to powerpc/next. [1/1] powerpc/44x: Implement Kernel Userspace Exec Protection (KUEP) https://git.kernel.org/powerpc/c/10248dcba1205042a3a0ea65eb441030702d97cd cheers