From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: Having troubles binding an SR-IOV VF to uio_pci_generic on Amazon instance Date: Thu, 1 Oct 2015 13:07:59 +0300 Message-ID: <20151001125604-mutt-send-email-mst@redhat.com> References: <20150930165359-mutt-send-email-mst@redhat.com> <560BF782.4070308@scylladb.com> <20150930175848-mutt-send-email-mst@redhat.com> <560C0171.7080507@scylladb.com> <20150930204016.GA29975@redhat.com> <20151001113828-mutt-send-email-mst@redhat.com> <560CF44A.60102@scylladb.com> <560CF9C5.8050901@scylladb.com> <20151001121638-mutt-send-email-mst@redhat.com> <560CFF2B.3090407@scylladb.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "dev@dpdk.org" To: Avi Kivity Return-path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 71D24E72 for ; Thu, 1 Oct 2015 12:08:03 +0200 (CEST) Content-Disposition: inline In-Reply-To: <560CFF2B.3090407@scylladb.com> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On Thu, Oct 01, 2015 at 12:38:51PM +0300, Avi Kivity wrote: > The sad thing is that you can do this since forever on a non-virtualized > system, or on a virtualized system if you don't need interrupt support. All > you're doing is blocking interrupt support on virtualized systems. True, Linux could do more to prevent this kind of abuse. In fact IIRC, if you enable secureboot, it does exactly that. A generic uio driver isn't a good interface because it relies on these sysfs files. We are luckly it doesn't work for VFs, I don't think we should do anything that relies on this interface in future applications. -- MST