From patchwork Mon Jan 29 22:25:16 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Stefan Berger X-Patchwork-Id: 10191009 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 66AC660212 for ; Mon, 29 Jan 2018 22:27:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 48158201BD for ; Mon, 29 Jan 2018 22:27:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3C19F2866D; Mon, 29 Jan 2018 22:27:17 +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 lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B900D201BD for ; Mon, 29 Jan 2018 22:27:16 +0000 (UTC) Received: from localhost ([::1]:44216 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1egHtT-0005h3-67 for patchwork-qemu-devel@patchwork.kernel.org; Mon, 29 Jan 2018 17:27:15 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34971) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1egHrz-0004Xh-Dc for qemu-devel@nongnu.org; Mon, 29 Jan 2018 17:25:44 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1egHrw-0005sy-8s for qemu-devel@nongnu.org; Mon, 29 Jan 2018 17:25:43 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:35048 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1egHrw-0005sU-3F for qemu-devel@nongnu.org; Mon, 29 Jan 2018 17:25:40 -0500 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w0TMNfZg033883 for ; Mon, 29 Jan 2018 17:25:39 -0500 Received: from e18.ny.us.ibm.com (e18.ny.us.ibm.com [129.33.205.208]) by mx0a-001b2d01.pphosted.com with ESMTP id 2ft873tbvr-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 29 Jan 2018 17:25:38 -0500 Received: from localhost by e18.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Mon, 29 Jan 2018 17:25:37 -0500 Received: from b01ledav002.gho.pok.ibm.com (b01ledav002.gho.pok.ibm.com [9.57.199.107]) by b01cxnp23034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w0TMPaE147775898; Mon, 29 Jan 2018 22:25:36 GMT Received: from b01ledav002.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4C47A124037; Mon, 29 Jan 2018 17:22:25 -0500 (EST) Received: from sbct-3.watson.ibm.com (unknown [9.47.158.153]) by b01ledav002.gho.pok.ibm.com (Postfix) with ESMTP id 361A9124035; Mon, 29 Jan 2018 17:22:25 -0500 (EST) From: Stefan Berger To: qemu-devel@nongnu.org Date: Mon, 29 Jan 2018 17:25:16 -0500 X-Mailer: git-send-email 2.5.5 In-Reply-To: <1517264719-18288-1-git-send-email-stefanb@linux.vnet.ibm.com> References: <1517264719-18288-1-git-send-email-stefanb@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18012922-0044-0000-0000-000003D7C9F1 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00008450; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000248; SDB=6.00982230; UDB=6.00498037; IPR=6.00761513; BA=6.00005799; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00019275; XFM=3.00000015; UTC=2018-01-29 22:25:38 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18012922-0045-0000-0000-000008073316 Message-Id: <1517264719-18288-4-git-send-email-stefanb@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2018-01-29_12:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1801290286 X-MIME-Autoconverted: from 8bit to quoted-printable by mx0a-001b2d01.pphosted.com id w0TMNfZg033883 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.158.5 Subject: [Qemu-devel] [PULL v2 3/6] tpm: lookup cancel path under tpm device class X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, marcandre.lureau@redhat.com, stefanb@linux.vnet.ibm.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Marc-André Lureau Since Linux commit 313d21eeab9282e, tpm devices have their own device class "tpm" and the cancel path must be looked up under /sys/class/tpm/ instead of /sys/class/misc/. Signed-off-by: Marc-André Lureau Reviewed-by: Stefan Berger Signed-off-by: Stefan Berger --- hw/tpm/tpm_passthrough.c | 34 ++++++++++++++++++++++------------ 1 file changed, 22 insertions(+), 12 deletions(-) diff --git a/hw/tpm/tpm_passthrough.c b/hw/tpm/tpm_passthrough.c index 537e11a..fc42fe0 100644 --- a/hw/tpm/tpm_passthrough.c +++ b/hw/tpm/tpm_passthrough.c @@ -214,7 +214,8 @@ static size_t tpm_passthrough_get_buffer_size(TPMBackend *tb) * Unless path or file descriptor set has been provided by user, * determine the sysfs cancel file following kernel documentation * in Documentation/ABI/stable/sysfs-class-tpm. - * From /dev/tpm0 create /sys/class/misc/tpm0/device/cancel + * From /dev/tpm0 create /sys/class/tpm/tpm0/device/cancel + * before 4.0: /sys/class/misc/tpm0/device/cancel */ static int tpm_passthrough_open_sysfs_cancel(TPMPassthruState *tpm_pt) { @@ -225,26 +226,35 @@ static int tpm_passthrough_open_sysfs_cancel(TPMPassthruState *tpm_pt) if (tpm_pt->options->cancel_path) { fd = qemu_open(tpm_pt->options->cancel_path, O_WRONLY); if (fd < 0) { - error_report("Could not open TPM cancel path : %s", + error_report("tpm_passthrough: Could not open TPM cancel path: %s", strerror(errno)); } return fd; } dev = strrchr(tpm_pt->tpm_dev, '/'); - if (dev) { - dev++; - if (snprintf(path, sizeof(path), "/sys/class/misc/%s/device/cancel", - dev) < sizeof(path)) { - fd = qemu_open(path, O_WRONLY); - if (fd < 0) { - error_report("tpm_passthrough: Could not open TPM cancel " - "path %s : %s", path, strerror(errno)); + if (!dev) { + error_report("tpm_passthrough: Bad TPM device path %s", + tpm_pt->tpm_dev); + return -1; + } + + dev++; + if (snprintf(path, sizeof(path), "/sys/class/tpm/%s/device/cancel", + dev) < sizeof(path)) { + fd = qemu_open(path, O_WRONLY); + if (fd < 0) { + if (snprintf(path, sizeof(path), "/sys/class/misc/%s/device/cancel", + dev) < sizeof(path)) { + fd = qemu_open(path, O_WRONLY); } } + } + + if (fd < 0) { + error_report("tpm_passthrough: Could not guess TPM cancel path"); } else { - error_report("tpm_passthrough: Bad TPM device path %s", - tpm_pt->tpm_dev); + tpm_pt->options->cancel_path = g_strdup(path); } return fd;