From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: Re: [PATCH v2 10/10] pci: place all uio pci device ids in a dedicated section Date: Tue, 19 Jan 2016 13:35:14 -0800 Message-ID: <20160119133514.03cf193f@xeon-e3> References: <1452430254-30390-1-git-send-email-david.marchand@6wind.com> <1453120248-28274-1-git-send-email-david.marchand@6wind.com> <1453120248-28274-11-git-send-email-david.marchand@6wind.com> <3759018.lgeOm8Q2D2@xps13> <20160119142930.GA25388@hmsreliant.think-freely.org> <20160119081019.607a9b48@xeon-e3> <20160119205614.GA24277@hmsreliant.think-freely.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Cc: dev@dpdk.org, Neil Horman To: Neil Horman Return-path: Received: from mail-pf0-f173.google.com (mail-pf0-f173.google.com [209.85.192.173]) by dpdk.org (Postfix) with ESMTP id 18518591A for ; Tue, 19 Jan 2016 22:35:08 +0100 (CET) Received: by mail-pf0-f173.google.com with SMTP id q63so187241789pfb.1 for ; Tue, 19 Jan 2016 13:35:08 -0800 (PST) In-Reply-To: <20160119205614.GA24277@hmsreliant.think-freely.org> 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 Tue, 19 Jan 2016 15:56:14 -0500 Neil Horman wrote: > On Tue, Jan 19, 2016 at 08:10:19AM -0800, Stephen Hemminger wrote: > > On Tue, 19 Jan 2016 09:29:31 -0500 > > Neil Horman wrote: > >=20 > > > On Tue, Jan 19, 2016 at 08:30:40AM +0100, Thomas Monjalon wrote: > > > > 2016-01-18 13:30, David Marchand: > > > > > We could do something =C3=A0 la modinfo, but let's keep it simple= for now. > > > > >=20 > > > > > With this, you can extract the devices that need to be bound to u= io / vfio > > > > > with tools like objdump : > > > > >=20 > > > > > $ objdump -j rte_pci_id_uio -s build/lib/librte_pmd_fm10k.so > > > > >=20 > > > > > Contents of section rte_pci_id_uio: > > > > > 15760 8680a415 ffffffff 8680d015 ffffffff ................ > > > > > 15770 8680a515 ffffffff 00000000 00000000 ................ > > > >=20 > > > > Yes we need a modinfo-like tool. > > > > Currently, the UIO/VFIO binding can be done after parsing the PCI d= evice list. > > > > It is better to define the device ids locally to their drivers but = it must > > > > be integrated with an appropriate parsing tool at the same time. > > > > And more importantly than any tool, the format of these ELF data mu= st be > > > > properly defined, documented and extensible. > > > >=20 > > > > Is there someone experimented with such format definition? > > > > Stephen, you were asking for this change, what is your opinion? > > > > I remember that Neil was also interested in this change: > > > > http://dpdk.org/ml/archives/dev/2015-January/012115.html > > > > Panu, Christian, this change could be related to distribution packa= ging. > > > > Thanks for helping to move this change forward. > > >=20 > > > Yes, I would be interested in seeing this. Is the ask here that some= one do it? > > > As I recall from the last thread that you reference, I thought David = M was > > > interested in writing it and soliciting for ideas. If thats no longe= r the case, > > > I can take a stab at writing it. > > >=20 > > > Neil > > >=20 > >=20 > > If these are libraries is there a way to have a real entry point > > to dump PCI id's.=20 > >=20 > Sure, you could write a method that could be dlsym-ed easily enough to fe= tch an > array of pci ids, or just print stuff the console. Not sure thats the be= st way, > but definately an option > Neil It is just that reading data with objdump is a kludge likely to get broken.