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=-1.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 DCF1CC282CD for ; Mon, 28 Jan 2019 23:23:04 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 A0607214DA for ; Mon, 28 Jan 2019 23:23:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="X7kkuWIq"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=sifive.com header.i=@sifive.com header.b="G8hGiJZm" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A0607214DA Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=sifive.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:To:Subject:Message-ID:Date:From: In-Reply-To:References:MIME-Version:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Gkq2+EdChpmWMJl7G+tcw0aWqUYlDnSrOmdvRGGwJkg=; b=X7kkuWIqcXD1Kq EgDa8uS5W28ZXV4IM8/xnw2n+BGyYoX/U7En6ilLbuB8DQBxtE1rqPsTtIoRVfHwv8C6HHY/56mT1 guvit+utxaxcX4E1PE3XwX03lk5lssgY5/pO6t84tq8X/cLNAFXuUCpwdqdDq9mt2TENbJr0ZBfQZ 59406HO9E9a6N+WJXPYiTIP62wBDCHAXME2JK+jE3sjeRSqu3hRqDKyeiyG88SaLHuYzVU1TFrLcl gm2NN708sYP/mH77CnFA9LUgpNKZHnZGyS3RIHZR5ZDemjAGx/9zc4T0hMZPlMYquBbuxXCLamV34 16hvPSoavrJ5+Hn8+jbA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1goGF4-0003mm-Ps; Mon, 28 Jan 2019 23:23:02 +0000 Received: from mail-wm1-x32f.google.com ([2a00:1450:4864:20::32f]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1goGF2-0003m6-Jj for linux-riscv@lists.infradead.org; Mon, 28 Jan 2019 23:23:01 +0000 Received: by mail-wm1-x32f.google.com with SMTP id g67so15776905wmd.2 for ; Mon, 28 Jan 2019 15:22:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=rL2ke4BgMMGJiZ/9hpGvvifFpTfg8dePwee1MY1zgfc=; b=G8hGiJZmidS8Fcq//T4GbFU3WHwGRnWTow1ltRU/3OKYCNNMADQepQAdTjI3RzK+Dw MDAV6Kr1uvP8NyENsTzY23kKDwua+zs1b+m1qxhnvV1o07fFEFPMpBrxt9NGF6EWP2b0 hSONsJ8F1lfYY991G7XlpJbJkxAdxYIXXUyqFolEttnmEPwdlfYhembVnh8hRou2LojV Hsoh/lf2a8D7000/fp6u3BSNE33xIuhBaeP0lE6vuLT6s2DwW91tHXdz2mcDqyYLllFL D/5DLIGtR0HdyjjcvCmORsEkRhgQQMoMPMzr3yWyY55OoONat6FNnPkZ2kkLWg2lNN/T 4KGQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=rL2ke4BgMMGJiZ/9hpGvvifFpTfg8dePwee1MY1zgfc=; b=SF+HKHZ+iw2KRnqzJDBar4Rnra5/bB3HeBWorBBYaAT1Jq6Po9DkHRwqNHw/wx+YXL Q/rtnZaMHq8AzEjfDUtqD74h8sYKc+ASAoCYqzah8Ue2wwJWGQArdIGn59KrlDY1w+XE 919q1Mt668smPNAfjNucMdd52x2t4wTf6mZZCp2WaFaIbAHakGWS0qABpiHf/dK8YKyq xLxDIJBhe39OZsrXN+juUadWlVTXS7NG2d2KIGINi8GWkDogs+JpVR+AlDo4+uZSmIWC NcplZoddYKCEUK/BmWzNPQmodYbbbotbM0y0psbsMcxlf2QJvzAflunJmaZ4m+ygr53m knxA== X-Gm-Message-State: AJcUukdIYF+6DPbrMPRORDm78Fljl9HRoF9R/iSE3hbzATDAj3SWYtof wpVt7HsGJMJHLK+Ywj5Vgi7HMpB8aOlnZid2jJOigziak0c= X-Google-Smtp-Source: ALg8bN4vi0ky1Lno4W5Uqf7W+BT4SRM/NhdnbJaDCeKio6GVruewcPcNfmLtih7o776pYyBdgTy3STjfoX98GQHSJQQ= X-Received: by 2002:a1c:7d54:: with SMTP id y81mr18789367wmc.106.1548717775081; Mon, 28 Jan 2019 15:22:55 -0800 (PST) MIME-Version: 1.0 References: <4aef7216-726c-f565-5c0f-cebd2aefb46d@wdc.com> <2e5329eff04e2b0bc2433b5d974bf10f@mailhost.ics.forth.gr> <7efecac7-17bd-5fc1-d0de-9fd498db4751@wdc.com> <452be0d3-da8e-643e-9f91-c38f0af36ffd@suse.de> <033872b8-49d5-2731-118f-967488f4763f@suse.de> In-Reply-To: From: Bruce Hoult Date: Mon, 28 Jan 2019 15:22:43 -0800 Message-ID: Subject: Re: [sw-dev] SBI extension proposal v2 To: ron minnich X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190128_152300_672675_DC61653C X-CRM114-Status: UNSURE ( 5.69 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "mark.rutland@arm.com" , Christoph Hellwig , Damien Le Moal , Olof Johansson , "alankao@andestech.com" , "abner.chang@hpe.com" , Benjamin Herrenschmidt , Palmer Dabbelt , Alexander Graf , "zong@andestech.com" , Atish Patra , "sw-dev@groups.riscv.org" , Paul Walmsley , Anup Patel , "mick@ics.forth.gr" , Alistair Francis , Luke Kenneth Casson Leighton , "linux-riscv@lists.infradead.org" , Andrew Waterman Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org On Mon, Jan 28, 2019 at 11:40 AM ron minnich wrote: > Short form: if the PMP makes it impossible to measure, disable and > replace firmware from the kernel, then PMP is a bug, not a feature. I disagree. The owner/user should be able to change the SBI, perhaps by booting into a special mode. The kernel in a system running normally shouldn't be able to. _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv