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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_2 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 4D320C3A5A7 for ; Wed, 4 Sep 2019 11:31:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2C42E22DBF for ; Wed, 4 Sep 2019 11:31:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727722AbfIDLbI (ORCPT ); Wed, 4 Sep 2019 07:31:08 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:11982 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726240AbfIDLbI (ORCPT ); Wed, 4 Sep 2019 07:31:08 -0400 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x84BS0M6141677 for ; Wed, 4 Sep 2019 07:31:07 -0400 Received: from e06smtp02.uk.ibm.com (e06smtp02.uk.ibm.com [195.75.94.98]) by mx0a-001b2d01.pphosted.com with ESMTP id 2ut9q8p4s1-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 04 Sep 2019 07:31:06 -0400 Received: from localhost by e06smtp02.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 4 Sep 2019 12:31:04 +0100 Received: from b06cxnps3074.portsmouth.uk.ibm.com (9.149.109.194) by e06smtp02.uk.ibm.com (192.168.101.132) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 4 Sep 2019 12:31:00 +0100 Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x84BUxkv40239168 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 4 Sep 2019 11:30:59 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BD11E42042; Wed, 4 Sep 2019 11:30:59 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C9F4E42047; Wed, 4 Sep 2019 11:30:58 +0000 (GMT) Received: from localhost.localdomain (unknown [9.85.171.171]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 4 Sep 2019 11:30:58 +0000 (GMT) Subject: Re: TPM 2.0 Linux sysfs interface From: Mimi Zohar To: Jason Gunthorpe Cc: Jordan Hand , Tadeusz Struk , Piotr =?ISO-8859-1?Q?Kr=F3l?= , linux-integrity@vger.kernel.org, Alexey Dobriyan Date: Wed, 04 Sep 2019 07:30:58 -0400 In-Reply-To: <20190904055829.GA3936@ziepe.ca> References: <20190827010559.GA31752@ziepe.ca> <1567007592.6115.58.camel@linux.ibm.com> <20190828161502.GC933@ziepe.ca> <20190902192632.GB5393@ziepe.ca> <1567460118.10024.316.camel@linux.ibm.com> <20190903055523.GA4500@ziepe.ca> <1567553383.4937.29.camel@linux.ibm.com> <20190904055829.GA3936@ziepe.ca> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.20.5 (3.20.5-1.fc24) Mime-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 19090411-0008-0000-0000-00000310ECDB X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19090411-0009-0000-0000-00004A2F4215 Message-Id: <1567596658.4937.40.camel@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-09-04_03:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1909040117 Sender: linux-integrity-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org On Wed, 2019-09-04 at 02:58 -0300, Jason Gunthorpe wrote: > On Tue, Sep 03, 2019 at 07:29:43PM -0400, Mimi Zohar wrote: > > > This discussion is going around in circles.  There are enough people > > asking that the kernel provide at least the TPM version (eg. TPM 1.2 > > or TPM 2.0).  Userspace applications/regression tests shouldn't have > > to figure out the TPM version by sending a TPM command and seeing if > > it fails.  That really isn't asking a lot. > > A single version number could be appropriate for sysfs > > > I would also prefer not having to be dependent on a userspace > > application to read the TPM PCRs in order to verify the IMA > > measurement list. > > Why? Being dependent on a userspace application implies a level of trust, that might not be warranted, depending on the system's configuration. Mimi