From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: Having troubles binding an SR-IOV VF to uio_pci_generic on Amazon instance Date: Thu, 1 Oct 2015 12:54:11 +0300 Message-ID: <560D02C3.9090608@scylladb.com> References: <560BD284.7040505@cloudius-systems.com> <20150930151632-mutt-send-email-mst@redhat.com> <560BDE24.8000308@scylladb.com> <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> <20151001120027-mutt-send-email-mst@redhat.com> <560CFB66.5050904@scylladb.com> <560CFFFF.4000601@6wind.com> <560D0059.5050003@scylladb.com> <560D0170.3080707@6wind.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Cc: "dev@dpdk.org" To: Vincent JARDIN , "Michael S. Tsirkin" Return-path: Received: from mail-wi0-f182.google.com (mail-wi0-f182.google.com [209.85.212.182]) by dpdk.org (Postfix) with ESMTP id 9FDA98D91 for ; Thu, 1 Oct 2015 11:54:13 +0200 (CEST) Received: by wicgb1 with SMTP id gb1so21189959wic.1 for ; Thu, 01 Oct 2015 02:54:13 -0700 (PDT) In-Reply-To: <560D0170.3080707@6wind.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 10/01/2015 12:48 PM, Vincent JARDIN wrote: > On 01/10/2015 11:43, Avi Kivity wrote: >> >> That is because the device itself contains an iommu. > > Yes. > > It could be an option: > - we could flag the Linux system unsafe when the device does not > have any IOMMU > - we flag the Linux system safe when the device has an IOMMU This already exists, it's called the tainted flag. I don't know if pci_uio_generic already taints the kernel; it certainly should with DMA capable devices.