From patchwork Wed May 10 23:54:22 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Berger X-Patchwork-Id: 9720779 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 9E71960244 for ; Wed, 10 May 2017 23:54:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ADBBF28635 for ; Wed, 10 May 2017 23:54:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A2AEF2863E; Wed, 10 May 2017 23:54:52 +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 2BC9828635 for ; Wed, 10 May 2017 23:54:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754340AbdEJXyg (ORCPT ); Wed, 10 May 2017 19:54:36 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:54367 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754184AbdEJXyd (ORCPT ); Wed, 10 May 2017 19:54:33 -0400 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v4ANn1FW008291 for ; Wed, 10 May 2017 19:54:32 -0400 Received: from e33.co.us.ibm.com (e33.co.us.ibm.com [32.97.110.151]) by mx0b-001b2d01.pphosted.com with ESMTP id 2abqg56knc-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Wed, 10 May 2017 19:54:32 -0400 Received: from localhost by e33.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Wed, 10 May 2017 17:54:29 -0600 Received: from b03ledav001.gho.boulder.ibm.com (b03ledav001.gho.boulder.ibm.com [9.17.130.232]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v4ANsS2L15991090; Wed, 10 May 2017 16:54:29 -0700 Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D09446E035; Wed, 10 May 2017 17:54:28 -0600 (MDT) Received: from sbct-3.watson.ibm.com (unknown [9.2.141.158]) by b03ledav001.gho.boulder.ibm.com (Postfix) with ESMTP id 4BBD96E041; Wed, 10 May 2017 17:54:28 -0600 (MDT) From: Stefan Berger To: tpmdd-devel@lists.sourceforge.net, linux-security-module@vger.kernel.org, jarkko.sakkinen@linux.intel.com Cc: jgunthorpe@obsidianresearch.com, linux-kernel@vger.kernel.org, Stefan Berger Subject: [PATCH v4 2/2] tpm: vtpm_proxy: Implement request_locality function. Date: Wed, 10 May 2017 19:54:22 -0400 X-Mailer: git-send-email 2.5.5 In-Reply-To: <1494460462-29022-1-git-send-email-stefanb@linux.vnet.ibm.com> References: <1494460462-29022-1-git-send-email-stefanb@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17051023-0008-0000-0000-000007C5D8CA X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00007044; HX=3.00000240; KW=3.00000007; PH=3.00000004; SC=3.00000210; SDB=6.00858879; UDB=6.00425615; IPR=6.00638356; BA=6.00005343; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00015403; XFM=3.00000015; UTC=2017-05-10 23:54:31 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17051023-0009-0000-0000-000042171BA8 Message-Id: <1494460462-29022-3-git-send-email-stefanb@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-05-10_20:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1705100161 Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP Implement the request_locality function. To set the locality on the backend we define vendor-specific TPM 1.2 and TPM 2 ordinals and send a command to the backend to set the locality for the next commands. Signed-off-by: Stefan Berger Reviewed-by: Jarkko Sakkinen --- drivers/char/tpm/tpm.h | 1 + drivers/char/tpm/tpm_vtpm_proxy.c | 34 ++++++++++++++++++++++++++++++++++ include/uapi/linux/vtpm_proxy.h | 5 +++++ 3 files changed, 40 insertions(+) diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index 4b4c8de..10f0467 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -527,6 +527,7 @@ enum tpm_transmit_flags { TPM_TRANSMIT_UNLOCKED = BIT(0), }; +ssize_t tpm_transfer(struct tpm_chip *chip, u8 *buf, u32 count, size_t bufsiz); ssize_t tpm_transmit(struct tpm_chip *chip, struct tpm_space *space, u8 *buf, size_t bufsiz, unsigned int flags); ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space, diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c b/drivers/char/tpm/tpm_vtpm_proxy.c index 751059d..374c4ff 100644 --- a/drivers/char/tpm/tpm_vtpm_proxy.c +++ b/drivers/char/tpm/tpm_vtpm_proxy.c @@ -371,6 +371,39 @@ static bool vtpm_proxy_tpm_req_canceled(struct tpm_chip *chip, u8 status) return ret; } +static int vtpm_proxy_request_locality(struct tpm_chip *chip, int locality) +{ + struct tpm_buf buf; + int rc; + const struct tpm_output_header *header; + + if (chip->flags & TPM_CHIP_FLAG_TPM2) + rc = tpm_buf_init(&buf, TPM2_ST_SESSIONS, + TPM2_CC_SET_LOCALITY); + else + rc = tpm_buf_init(&buf, TPM_TAG_RQU_COMMAND, + TPM_ORD_SET_LOCALITY); + if (rc) + return rc; + tpm_buf_append_u8(&buf, locality); + + rc = tpm_transfer(chip, buf.data, tpm_buf_length(&buf), PAGE_SIZE); + if (rc < 0) { + locality = rc; + goto out; + } + + header = (const struct tpm_output_header *)buf.data; + rc = be32_to_cpu(header->return_code); + if (rc) + locality = -1; + +out: + tpm_buf_destroy(&buf); + + return locality; +} + static const struct tpm_class_ops vtpm_proxy_tpm_ops = { .flags = TPM_OPS_AUTO_STARTUP, .recv = vtpm_proxy_tpm_op_recv, @@ -380,6 +413,7 @@ static const struct tpm_class_ops vtpm_proxy_tpm_ops = { .req_complete_mask = VTPM_PROXY_REQ_COMPLETE_FLAG, .req_complete_val = VTPM_PROXY_REQ_COMPLETE_FLAG, .req_canceled = vtpm_proxy_tpm_req_canceled, + .request_locality = vtpm_proxy_request_locality, }; /* diff --git a/include/uapi/linux/vtpm_proxy.h b/include/uapi/linux/vtpm_proxy.h index a69e991..6b91c2c 100644 --- a/include/uapi/linux/vtpm_proxy.h +++ b/include/uapi/linux/vtpm_proxy.h @@ -46,4 +46,9 @@ struct vtpm_proxy_new_dev { #define VTPM_PROXY_IOC_NEW_DEV _IOWR(0xa1, 0x00, struct vtpm_proxy_new_dev) +/* vendor specific commands to set locality */ +#define TPM2_CC_SET_LOCALITY 0x20001000 +#define TPM_ORD_SET_LOCALITY 0x20001000 + + #endif /* _UAPI_LINUX_VTPM_PROXY_H */