From patchwork Wed Jan 9 22:11:02 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Berger X-Patchwork-Id: 10754943 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CDB9A13BF for ; Wed, 9 Jan 2019 22:11:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BE536296A2 for ; Wed, 9 Jan 2019 22:11:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BCF1D296AB; Wed, 9 Jan 2019 22:11:28 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2B5D42965B for ; Wed, 9 Jan 2019 22:11:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727614AbfAIWL1 (ORCPT ); Wed, 9 Jan 2019 17:11:27 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:49958 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727617AbfAIWLS (ORCPT ); Wed, 9 Jan 2019 17:11:18 -0500 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id x09MAO01141996 for ; Wed, 9 Jan 2019 17:11:17 -0500 Received: from e34.co.us.ibm.com (e34.co.us.ibm.com [32.97.110.152]) by mx0b-001b2d01.pphosted.com with ESMTP id 2pwsdvr9j4-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 09 Jan 2019 17:11:16 -0500 Received: from localhost by e34.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 9 Jan 2019 22:11:13 -0000 Received: from b03ledav005.gho.boulder.ibm.com (b03ledav005.gho.boulder.ibm.com [9.17.130.236]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x09MBCvP14942338 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 9 Jan 2019 22:11:12 GMT Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 568EFBE71A; Wed, 9 Jan 2019 22:11:12 +0000 (GMT) Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EDE94BE73C; Wed, 9 Jan 2019 22:11:11 +0000 (GMT) Received: from sbct-3.pok.ibm.com (unknown [9.47.158.153]) by b03ledav005.gho.boulder.ibm.com (Postfix) with ESMTP; Wed, 9 Jan 2019 22:11:11 +0000 (GMT) From: Stefan Berger To: linux-integrity@vger.kernel.org, jarkko.sakkinen@linux.intel.com Cc: linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, Stefan Berger Subject: [PATCH 4/5] tpm: ppi: Possibly show command parameter if TPM PPI 1.3 is used Date: Wed, 9 Jan 2019 17:11:02 -0500 X-Mailer: git-send-email 2.17.2 In-Reply-To: <20190109221103.1897677-1-stefanb@linux.vnet.ibm.com> References: <20190109221103.1897677-1-stefanb@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19010922-0016-0000-0000-000009725C24 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00010375; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000274; SDB=6.01144159; UDB=6.00595717; IPR=6.00924421; MB=3.00025056; MTD=3.00000008; XFM=3.00000015; UTC=2019-01-09 22:11:15 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19010922-0017-0000-0000-000041B5FFFB Message-Id: <20190109221103.1897677-5-stefanb@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-01-09_11:,, 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=8.0.1-1810050000 definitions=main-1901090176 Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP TPM PPI 1.3 introduces an additional optional command parameter that may be needed for some commands. Display the parameter if the command requires such a parameter. Only command 23 needs one. Signed-off-by: Stefan Berger --- drivers/char/tpm/tpm_ppi.c | 32 ++++++++++++++++++++++++++++++-- 1 file changed, 30 insertions(+), 2 deletions(-) diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c index 72182b415c76..ab61ee208125 100644 --- a/drivers/char/tpm/tpm_ppi.c +++ b/drivers/char/tpm/tpm_ppi.c @@ -21,6 +21,7 @@ #include "tpm.h" #define TPM_PPI_REVISION_1 1 +#define TPM_PPI_REVISION_2 2 #define TPM_PPI_FN_VERSION 1 #define TPM_PPI_FN_SUBREQ 2 #define TPM_PPI_FN_GETREQ 3 @@ -36,6 +37,11 @@ static const guid_t tpm_ppi_guid = GUID_INIT(0x3DDDFAA6, 0x361B, 0x4EB4, 0xA4, 0x24, 0x8D, 0x10, 0x08, 0x9D, 0x16, 0x53); +static bool tpm_ppi_req_has_parameter(u64 req) +{ + return req == 23; +} + static inline union acpi_object * tpm_eval_dsm(acpi_handle ppi_handle, int func, acpi_object_type type, union acpi_object *argv4, u64 rev) @@ -59,9 +65,14 @@ static ssize_t tpm_show_ppi_request(struct device *dev, ssize_t size = -EINVAL; union acpi_object *obj; struct tpm_chip *chip = to_tpm_chip(dev); + u64 rev = TPM_PPI_REVISION_2; + u64 req; + + if (strcmp(chip->ppi_version, "1.2") < 0) + rev = TPM_PPI_REVISION_1; obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETREQ, - ACPI_TYPE_PACKAGE, NULL, TPM_PPI_REVISION_1); + ACPI_TYPE_PACKAGE, NULL, rev); if (!obj) return -ENXIO; @@ -71,7 +82,24 @@ static ssize_t tpm_show_ppi_request(struct device *dev, * error. The second is pending TPM operation requested by the OS, 0 * means none and >0 means operation value. */ - if (obj->package.count == 2 && + if (obj->package.count == 3 && + obj->package.elements[0].type == ACPI_TYPE_INTEGER && + obj->package.elements[1].type == ACPI_TYPE_INTEGER && + obj->package.elements[2].type == ACPI_TYPE_INTEGER) { + if (obj->package.elements[0].integer.value) + size = -EFAULT; + else { + req = obj->package.elements[1].integer.value; + if (tpm_ppi_req_has_parameter(req)) + size = scnprintf(buf, PAGE_SIZE, + "%llu %llu\n", + req, + obj->package.elements[2].integer.value); + else + size = scnprintf(buf, PAGE_SIZE, + "%llu\n", req); + } + } else if (obj->package.count == 2 && obj->package.elements[0].type == ACPI_TYPE_INTEGER && obj->package.elements[1].type == ACPI_TYPE_INTEGER) { if (obj->package.elements[0].integer.value)