From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id CF195DE3 for ; Thu, 2 Feb 2017 13:58:04 +0100 (CET) Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 3D7F5468; Thu, 2 Feb 2017 12:58:05 +0000 (UTC) Received: from rhvm.imac (ovpn-117-26.ams2.redhat.com [10.36.117.26]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id v12Cw3Ak008271; Thu, 2 Feb 2017 07:58:04 -0500 References: <1eca3907-39e6-2b09-a8fc-fe894988cc79@redhat.com> To: "Burakov, Anatoly" , "dev@dpdk.org" From: Eelco Chaudron Message-ID: <2ce1bbcd-f3f2-bf8f-7b86-f04072139c4b@redhat.com> Date: Thu, 2 Feb 2017 13:58:01 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Thu, 02 Feb 2017 12:58:05 +0000 (UTC) Subject: Re: [dpdk-dev] Hotplug support for VFIO X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list Reply-To: echaudron@redhat.com List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 02 Feb 2017 12:58:05 -0000 On 02/02/17 13:05, Burakov, Anatoly wrote: > Hi Eelco, > > Please forgive me my ignorance on this matter, but doesn't it work at the moment? I would assume that if regular PCI hotplug works (with igb_uio), then so would hotplug with VFIO, as it basically utilizes the same PCI infrastructure igb_uio does. That said, I'm not aware of any patches submitted that had to do with VFIO and hotplug, so I guess the answer is, not at the moment. > > Thanks, > Anatoly I was asking as the documentation explicitly mentions its not supported. http://dpdk.org/doc/guides/prog_guide/port_hotplug_framework.html#hotplug - "To detach a port, the port should be backed by a device that igb_uio manages. VFIO is not supported." I could not find any specific reason why it's not supported, so if some one can explain this it would help also... Cheers, Eelco