From patchwork Wed Feb 26 19:50:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Christensen X-Patchwork-Id: 66058 X-Patchwork-Delegate: david.marchand@redhat.com Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 4F9D7A055A; Wed, 26 Feb 2020 20:50:43 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 1F0BB1BFAB; Wed, 26 Feb 2020 20:50:42 +0100 (CET) Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by dpdk.org (Postfix) with ESMTP id 0E40D2C02 for ; Wed, 26 Feb 2020 20:50:40 +0100 (CET) Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 01QJoOIu145660 for ; Wed, 26 Feb 2020 14:50:40 -0500 Received: from ppma01wdc.us.ibm.com (fd.55.37a9.ip4.static.sl-reverse.com [169.55.85.253]) by mx0b-001b2d01.pphosted.com with ESMTP id 2ydq601rae-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 26 Feb 2020 14:50:39 -0500 Received: from pps.filterd (ppma01wdc.us.ibm.com [127.0.0.1]) by ppma01wdc.us.ibm.com (8.16.0.27/8.16.0.27) with SMTP id 01QJmOKU018102 for ; Wed, 26 Feb 2020 19:50:39 GMT Received: from b03cxnp08028.gho.boulder.ibm.com (b03cxnp08028.gho.boulder.ibm.com [9.17.130.20]) by ppma01wdc.us.ibm.com with ESMTP id 2ydcmkfpx4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 26 Feb 2020 19:50:39 +0000 Received: from b03ledav006.gho.boulder.ibm.com (b03ledav006.gho.boulder.ibm.com [9.17.130.237]) by b03cxnp08028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 01QJocp359441656 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 26 Feb 2020 19:50:38 GMT Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 78037C6057; Wed, 26 Feb 2020 19:50:38 +0000 (GMT) Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 46149C605A; Wed, 26 Feb 2020 19:50:38 +0000 (GMT) Received: from localhost.localdomain (unknown [9.114.224.51]) by b03ledav006.gho.boulder.ibm.com (Postfix) with ESMTP; Wed, 26 Feb 2020 19:50:38 +0000 (GMT) From: David Christensen To: dev@dpdk.org Cc: David Christensen Date: Wed, 26 Feb 2020 11:50:33 -0800 Message-Id: <20200226195033.33877-1-drc@linux.vnet.ibm.com> X-Mailer: git-send-email 2.18.1 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.572 definitions=2020-02-26_07:2020-02-26, 2020-02-26 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 lowpriorityscore=0 adultscore=0 malwarescore=0 mlxlogscore=999 clxscore=1015 bulkscore=0 suspectscore=1 mlxscore=0 phishscore=0 priorityscore=1501 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002260120 Subject: [dpdk-dev] [PATCH] bus/pci: support iova=va on PowerNV systems X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Bare metal PowerNV systems include a DPDK supported IOMMU that allows IOVA=VA support. Test for the platform type and report virtual address support if running on a PowerNV system. Signed-off-by: David Christensen --- drivers/bus/pci/linux/pci.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/drivers/bus/pci/linux/pci.c b/drivers/bus/pci/linux/pci.c index 740a2cdad..696dc177e 100644 --- a/drivers/bus/pci/linux/pci.c +++ b/drivers/bus/pci/linux/pci.c @@ -549,6 +549,35 @@ pci_device_iommu_support_va(const struct rte_pci_device *dev) bool pci_device_iommu_support_va(__rte_unused const struct rte_pci_device *dev) { + /* + * IOMMU is always present on a PowerNV host (IOMMUv2). + * IOMMU is also present in a KVM/QEMU VM (IOMMUv1) but is not + * currently supported by DPDK. Test for our current environment + * and report VA support as appropriate. + */ + + char *line = 0; + size_t len = 0; + char filename[PATH_MAX] = "/proc/cpuinfo"; + FILE *fp = fopen(filename, "r"); + + if (fp == NULL) { + RTE_LOG(ERR, EAL, "%s(): can't open %s: %s\n", + __func__, filename, strerror(errno)); + return false; + } + + /* Check for a PowerNV platform */ + while (getline(&line, &len, fp) != -1) { + if (strstr(line, "platform") != NULL) + if (strstr(line, "PowerNV") != NULL) { + RTE_LOG(DEBUG, EAL, "Running on a PowerNV system\n"); + fclose(fp); + return true; + } + } + fclose(fp); + return false; } #else