From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 7AFD4A04BC; Thu, 17 Sep 2020 12:22:15 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 3D9771D5B0; Thu, 17 Sep 2020 12:22:14 +0200 (CEST) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by dpdk.org (Postfix) with ESMTP id 558B91D5B0 for ; Thu, 17 Sep 2020 12:22:11 +0200 (CEST) IronPort-SDR: ygWc8sRdGbfoYbRiC184pTqOzXBx0AfkbUO0NyQisapynwY85QlI61TNHzllBEnCdnjdDkn6yI aebc89soOddg== X-IronPort-AV: E=McAfee;i="6000,8403,9746"; a="158970059" X-IronPort-AV: E=Sophos;i="5.76,436,1592895600"; d="scan'208";a="158970059" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Sep 2020 03:22:10 -0700 IronPort-SDR: FbBtzLqvbVwhhq11tuBPqgeODaRbLvkRmF2im44xuLJVQt44QeNmHVKBTFFtHiot26l8qkxRzW p/Yx7em1b3bg== X-IronPort-AV: E=Sophos;i="5.76,436,1592895600"; d="scan'208";a="508350970" Received: from bricha3-mobl.ger.corp.intel.com ([10.213.24.6]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-SHA; 17 Sep 2020 03:22:09 -0700 Date: Thu, 17 Sep 2020 11:22:04 +0100 From: Bruce Richardson To: Sarosh Arif Cc: dev@dpdk.org Message-ID: <20200917102204.GE1568@bricha3-MOBL.ger.corp.intel.com> References: <20200917091723.GD1568@bricha3-MOBL.ger.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Subject: Re: [dpdk-dev] unable to bind to vfio-pci 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" On Thu, Sep 17, 2020 at 02:21:27PM +0500, Sarosh Arif wrote: > On Thu, Sep 17, 2020 at 2:17 PM Bruce Richardson > wrote: > > > > On Thu, Sep 17, 2020 at 11:52:58AM +0500, Sarosh Arif wrote: > > > I have been trying to bind to vfio-pci using usertools/dpdk-devbind.py > > > but am unable to do so. The reason behind this is that I am unable to > > > write in /sys/bus/pci/drivers/vfio-pci/bind. Upon searching solutions > > > I tried a couple of things such as setting iommu=pt and intel_iommu=on > > > and ensured vt-d is enabled. > > > Along with this I have made sure that the vfio-pci module is correctly > > > loaded. I have also tried > > > > > > chmod 666 /sys/bus/pci/drivers/vfio-pci/bind > > > > > > So that I have permissions to write in this file. > > > > > > The error I get when I use usertools/dpdk-devbind.py to bind is this: > > > Error: bind failed for 0000:b7:00.1 - Cannot bind to driver vfio-pci > > > > > > The details of 0000:b7:00.1 are as follows: > > > Ethernet Connection X722 for 10GBASE-T 37d2' if=eno6 drv=i40e > > > > > > I have also unbinded The pci bridge to which 0000:b7:00.1 was connected. > > > > > > What more can be done to resolve this? > > > > > Since you describe changing permissions on the "bind" file, are you trying > > to run dpdk-devbind.py as a non-root user? Does it work as root? > I am running it as a root user. It does not work as a root user. One possible problem that it could be, is that you will need to ensure that any other ports on the same device are either similarly bound to vfio-pci or not bound to any driver. You can't have e.g. a 2-port X722 NIC where one port is bound to the kernel driver, while another is bound to vfio in userspace.