Received: by 10.223.185.116 with SMTP id b49csp1025384wrg; Fri, 16 Feb 2018 11:02:31 -0800 (PST) X-Google-Smtp-Source: AH8x224all8SD6XoIp4wH44mgaGuBc741e2En1l9CU8VGMxybLKeV1FZTIBbakgbndCkbuGap2Hl X-Received: by 2002:a17:902:848c:: with SMTP id c12-v6mr6857927plo.329.1518807751045; Fri, 16 Feb 2018 11:02:31 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1518807751; cv=none; d=google.com; s=arc-20160816; b=IPE/oqbn73Qkm4YwCJ7qnW09GcH1jFa/3VSAueruDjqRzK3rLDIfVsEWdwFKEel8ns Q326Uta2327Hk8LRX3XdSnl/6b8ZZGjwT4KAJs+m8gdAFq6RSlrXPb86f4Z9nmMRd9RG VTLyFMcOPIPPKGOPeuSa4JURVLts+t3+r9M0aDP8TReeZ5iTb8yWIke5vlpNiNv5CmVC mdGYy7MvG6tb1a7pK0g2YhnaU5VNMkAXYU5vzmuHTW2jvDJJTGR/m3245BN8E0vOsu7J tP9vZ21jnOAn/Wl0icNs8Qu+Rm6xZQq3jV+6YjgnDOqu7XVFYxf3lvB/hiu86Lulj/Fx ReYg== 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:arc-authentication-results; bh=W2pP6yXtakNRaIlMIYHRmFAvEpvJDivnMYbp5ZqToyc=; b=i/BT272EIoMf26c9qL7A4o6XJVUL6ca216j7OkIAc0Knd6A78C57aWXGGI+ufQYO0O VGxTxM3FMiw9/zak/PHxi9facxH/SvGEHJneQ69OnEzgoT2+0w5QKfdjka6kqCQHU8i0 By21/kyZQN/jZu7BfClI6ovb38TW1zZ82Sv8mtD7w8ZTxPCUeMswerzZc6ZHxRcc6oNI HD/czwkHZUvKSedCPeL3gnvTJKundyFl7skerU1jEju6LvawPBZNtqyjXVF2MaXKwPUh SG/csoiAVKgt0e5MlNByHTpp6KhfWFOoF1G4JUMfkDox61grOWpJoFPTpem9xgPv7NZL diNw== ARC-Authentication-Results: i=1; mx.google.com; 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 Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id l4si211831pgc.586.2018.02.16.11.02.16; Fri, 16 Feb 2018 11:02:31 -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; 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 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935300AbeBPLIa (ORCPT + 99 others); Fri, 16 Feb 2018 06:08:30 -0500 Received: from mail.skyhub.de ([5.9.137.197]:49260 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935119AbeBPLI2 (ORCPT ); Fri, 16 Feb 2018 06:08:28 -0500 X-Virus-Scanned: Nedap ESD1 at mail.skyhub.de Received: from mail.skyhub.de ([127.0.0.1]) by localhost (blast.alien8.de [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id CqoHvNIwIzEV; Fri, 16 Feb 2018 12:08:27 +0100 (CET) Received: from pd.tnic (p200300EC2BCAF7004CA5CE08379D95D3.dip0.t-ipconnect.de [IPv6:2003:ec:2bca:f700:4ca5:ce08:379d:95d3]) (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 27AE51EC028C; Fri, 16 Feb 2018 12:08:27 +0100 (CET) Date: Fri, 16 Feb 2018 12:08:21 +0100 From: Borislav Petkov To: Ard Biesheuvel Cc: Joe Konno , Matthew Garrett , Ingo Molnar , Andy Lutomirski , linux-efi@vger.kernel.org, Linux Kernel Mailing List , Jeremy Kerr , Andi Kleen , Tony Luck , Benjamin Drung , Peter Jones Subject: Re: [PATCH 0/2] efivars: reading variables can generate SMIs Message-ID: <20180216110821.GB29042@pd.tnic> References: <20180215182208.35003-1-joe.konno@linux.intel.com> <20180216105548.GA29042@pd.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.3 (2018-01-21) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Feb 16, 2018 at 10:58:47AM +0000, Ard Biesheuvel wrote: > By your own reasoning above, that's a no-no as well. I'm sure we can come up with some emulation - the same way we did the BIOS emulation. > But thanks for your input. Anyone else got something constructive to contribute? The not-breaking userspace is constructive contribution. The last paragraph is my usual rant. -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.