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=-5.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 DC6F8C433E0 for ; Tue, 26 Jan 2021 11:08:51 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 9B12823108 for ; Tue, 26 Jan 2021 11:08:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9B12823108 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=YRIfICjei/WGojz50D05t6q+JDQEzgAFtCFfzrocZks=; b=zv8P6W/0oyFndEJ8NW2+0jK0n /GibMU8haUYeALDXXYB+M+9OXk//D93LTTTAln/KL1pnKzcHRLcU/RXwpO2Cwu/t+7GKR0y7jB8Lh uOqiv0nYVJWAnesTVDMsPbbD/UWN7loG5FhbF4hbsarAZ8D/9hLIZyTocVxwwi5hPDQX3WXt8Q6P0 QZ5zOM3j+MDgSK7rWmpDV5QElPifscjoZVu2+1C0Q2bSyR9tAvDPnxLxbZ1T9X0hjbDtjjBu3mZ4t nY9HiVNd/Vo/QISK5GixSUFUY/9f/VzymoGqY41qP4K0Usfuw26ZREpTwWT/i114qdgSgvwm9KE8g lOoFyeISg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l4MC8-0004cf-Gj; Tue, 26 Jan 2021 11:07:36 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l4MC6-0004bq-Dy for linux-arm-kernel@lists.infradead.org; Tue, 26 Jan 2021 11:07:35 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9371123104; Tue, 26 Jan 2021 11:07:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1611659252; bh=Th1n2vBfHxnkVVSsNrixjJli2OKpllXJh+hE/3Hvvcc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Q2rTshQA61bJ8iCA4+wQenPvDQFO2kt4i8sLYJHwJlwMO14LwocU4rux19bCWDSfU 93mVaY1czMYetamC+Fx042rV/lzBN1esY6wdK8eVOhnbsiJNAmf0URZ+sT/mVdgBo+ IUSbngx+dQRjCO6Bs0pGazAUbPTY1gygix3UzXbx1JO6LXX0pC/NomvqHnC7WZXNxU kYmXiqUF1VRj/aUZ9JESCjSydU2Qi7niQbRWbcyToXHY77tj9MINyo1N4gDSJm4WUK NnwaqBNn6R1gaws5iDUAD7qzNW6GQWCVDbbLkipHMSidHy2tso02JOBUkiVoRnEOU1 JDneomajc8u2A== Date: Tue, 26 Jan 2021 11:07:28 +0000 From: Will Deacon To: Vladimir Murzin Subject: Re: [PATCH v3 2/2] arm64: Introduce HWCAPS2_EXECONLY Message-ID: <20210126110728.GB29467@willie-the-truck> References: <20210119160723.116983-1-vladimir.murzin@arm.com> <20210119160723.116983-3-vladimir.murzin@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210119160723.116983-3-vladimir.murzin@arm.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210126_060734_575343_66B329B7 X-CRM114-Status: UNSURE ( 8.58 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: catalin.marinas@arm.com, keescook@chromium.org, linux-arm-kernel@lists.infradead.org, dave.martin@arm.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Jan 19, 2021 at 04:07:23PM +0000, Vladimir Murzin wrote: > With EPAN supported it might be handy to user know that PROT_EXEC > gives execute-only permission, so advertise it via HWCAPS2_EXECONLY I don't want to merge this without a concrete need for it in userspace. Kees -- do you see this being necessary? I'm having a hard time understanding what an application would do differently at runtime based on this hwcap. Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel