Received: by 2002:a25:1506:0:0:0:0:0 with SMTP id 6csp5875331ybv; Wed, 12 Feb 2020 01:47:55 -0800 (PST) X-Google-Smtp-Source: APXvYqyRTcB+1aODtxZ53rE9Ufi6m5ncOTBuXv0ETa074H+okCg+dAynTf3DFskFSgvPc78WL8l5 X-Received: by 2002:a9d:2264:: with SMTP id o91mr8584711ota.328.1581500875523; Wed, 12 Feb 2020 01:47:55 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1581500875; cv=none; d=google.com; s=arc-20160816; b=svWks3jnYtGQj+V963PUUIPHkBzpkw6kG/IgF2DZzoAxp/G7seTO75y06TFLzKRpHB Z6D2XkE16Ic1WKF5tTkVivPejxFQ/+ll1GEM/zntBwrwl7MgyN/O+PpofKHqsmzBgOpW ZXfNIDS0hRaWY0smXJL3T838BIHJyUbZp7q8VdXmwEvOq+QX0wqKGduJwe41TFUKSaWr MaaXqnLcecsZCDiRLL2OhxehOMqRp8ciZP7OjjxkL/O0LhdbDDRBWK4/6G53Po0RRVOK EukTQKFHPVZjkIhgSHV7RV33j8/JbjwQGwThMsNvX6V+u2gZLclQXOFpgknU+7KBGVlh f2HQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:dkim-signature; bh=A+UxdxRfhb2KxZ5sW3vuVAuCDanzPsN8zts9XRHkNTA=; b=E4pEnVXNLEQquz7NJrmPo/mOxzQcHI716nuxzCJF8hR9oYHzpRDSdBPZwEWTX98XG4 f902xRD/P187qPIcy2dFYy1REEz0dPyo51xygML4v0sC9TiTH/blHKx3GMdUe46cx6kl mBfWBirhjfbNV9/TNLatiS4ywfaB4+Rq1QyI27I0eL5/DdnU9fY4oAB4dzksM8A3Wn5O wt+r+3bIMu8vONkYPtOn6mUbN7axcGxYqdESMg+oGdPIH1lubyML4p/Kg3IXr1GchbTr 3q6PY2MFYRcZo+c+/RyZWCbFe6M2SkhKRk1VHkTvhn9e6iAxDq9tG85H+xgqCtQk4bMZ b7GQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@alien8.de header.s=dkim header.b=H4wRIpkK; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=alien8.de Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id i3si3552102otc.272.2020.02.12.01.47.42; Wed, 12 Feb 2020 01:47:55 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@alien8.de header.s=dkim header.b=H4wRIpkK; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=alien8.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728721AbgBLJra (ORCPT + 99 others); Wed, 12 Feb 2020 04:47:30 -0500 Received: from mail.skyhub.de ([5.9.137.197]:54502 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728605AbgBLJra (ORCPT ); Wed, 12 Feb 2020 04:47:30 -0500 Received: from zn.tnic (p200300EC2F09E80011DF4A8A67D9D17B.dip0.t-ipconnect.de [IPv6:2003:ec:2f09:e800:11df:4a8a:67d9:d17b]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id D187F1EC0CE4; Wed, 12 Feb 2020 10:47:28 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1581500848; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=A+UxdxRfhb2KxZ5sW3vuVAuCDanzPsN8zts9XRHkNTA=; b=H4wRIpkKfQOSd93tLrrVNgqNNdrbHHkjFWCmVHmTbEKhLJcSVbWj2nvtHtVCsC2LgAhyHj oG36/dDcP6WZoXCIEKYe/baFZv/TOp6Y33MZHRWP0ZcYkLEZy1KNy+HPe8vV1tZ7K8gre8 0rFkquLVMlKS3piZC/BMj+j4srUnAi8= Date: Wed, 12 Feb 2020 10:47:21 +0100 From: Borislav Petkov To: Arvind Sankar Cc: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org, linux-kernel@vger.kernel.org, Michael Matz Subject: Re: [PATCH v2] x86/boot: Use 32-bit (zero-extended) move for z_output_len Message-ID: <20200212094721.GB30793@zn.tnic> References: <20200211161739.GE32279@zn.tnic> <20200211173333.1722739-1-nivedita@alum.mit.edu> <20200211181559.GI32279@zn.tnic> <20200211192739.GA1761914@rani.riverdale.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20200211192739.GA1761914@rani.riverdale.lan> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Feb 11, 2020 at 02:27:39PM -0500, Arvind Sankar wrote: > Yes, this is just a "neatening" patch to use a more appropriate > instruction. There would have to be a lot of work to allow kernels to be > bigger than 2Gb, And yet we're bloating up, right into that limit... ;-\ -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette