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=-11.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 0B8EDC43461 for ; Thu, 17 Sep 2020 17:07:40 +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 795DC206CA for ; Thu, 17 Sep 2020 17:07:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="3DAC1gf/" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 795DC206CA Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com 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=BCJfjkj2Bd6OH556oKDfx5kOO/9doWad5qp2w4KO3ug=; b=3DAC1gf/oSgCmz7K5KixwxyGa Jkwxpj83FO8gwCa3CpWgJSwGCL1d169754LtxYrP6NI+E3VMmSeYhQgIXiSLmuvAvJwW7hIIi6e48 ijUFZQboLo3HbqnRaOodJ0H+ntTq4BF8VEKgIHHqDaVyJcAbTSJcUQ9VgpW1rKCbRXibcam2oh6R8 BvMHjfQW6aPzUcmUeCRbw02MdG+8msnJetMznCdI9VOw+caCFuMN60ZoGdrnCKR6iVbX5oEh81TRN ImIhfHa+cSJ5bjXgd1a6FjbHpvr6ov4bslB5Se9AqoHnIyik+ju3xe7zU/8oQCSjRWmkERBl8Q/vu mnXPYINkA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kIxMI-0002G4-0W; Thu, 17 Sep 2020 17:06:10 +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 1kIxMF-0002Ej-Dg for linux-arm-kernel@lists.infradead.org; Thu, 17 Sep 2020 17:06:08 +0000 Received: from gaia (unknown [31.124.44.166]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 49B78214D8; Thu, 17 Sep 2020 17:06:04 +0000 (UTC) Date: Thu, 17 Sep 2020 18:06:01 +0100 From: Catalin Marinas To: Andrey Konovalov Subject: Re: [PATCH v2 26/37] arm64: mte: Convert gcr_user into an exclude mask Message-ID: <20200917170601.GO10662@gaia> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: 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-20200917_130607_559885_F20D126E X-CRM114-Status: GOOD ( 14.68 ) 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: linux-arm-kernel@lists.infradead.org, Marco Elver , Elena Petrova , Kevin Brodsky , Will Deacon , Branislav Rankov , kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Alexander Potapenko , Evgenii Stepanov , Andrey Ryabinin , Andrew Morton , Vincenzo Frascino , Dmitry Vyukov 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, Sep 15, 2020 at 11:16:08PM +0200, Andrey Konovalov wrote: > From: Vincenzo Frascino > > The gcr_user mask is a per thread mask that represents the tags that are > excluded from random generation when the Memory Tagging Extension is > present and an 'irg' instruction is invoked. > > gcr_user affects the behavior on EL0 only. > > Currently that mask is an include mask and it is controlled by the user > via prctl() while GCR_EL1 accepts an exclude mask. > > Convert the include mask into an exclude one to make it easier the > register setting. > > Note: This change will affect gcr_kernel (for EL1) introduced with a > future patch. > > Signed-off-by: Vincenzo Frascino > Signed-off-by: Andrey Konovalov Reviewed-by: Catalin Marinas _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel