netdev - Re: [PATCH net] net: ethernet: davicom: Allow to select DM9000 for nios2

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 12 Dec 2014 11:17:21 +0100
From:	Tobias Klauser <tklauser@...tanz.ch>
To:	David Laight <David.Laight@...LAB.COM>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net] net: ethernet: davicom: Allow to select DM9000 for
 nios2

On 2014-12-12 at 11:08:03 +0100, David Laight <David.Laight@...LAB.COM> wrote:
> From: Tobias Klauser
> > On 2014-12-12 at 10:49:13 +0100, David Laight <David.Laight@...LAB.COM> wrote:
> > > From: Tobias Klauser
> > > > This chip is present on older revisions of the DE2 development kit.
> > >
> > > Doesn't that mean the selector should be DE2 not NIOS2.
> > >
> > > NIOS2 is a cpu not a board and I think this is an external peripheral
> > > not something implemented in the fpga itself.
> > 
> > You're of course right, but since nios2 relies on device tree there is
> > no notion of a specific board at compile time.
> > 
> > Moreover, the chip might be used on other boards (I personally know of
> > at least one) based on the nios2 softcore.
> 
> And I've got several boards on my desk that have Altera fpgas and
> could conceivably run linux, none of which have that chip.
> 
> Given the typical memory size constraints of such systems I can't
> actually imagine anyone wanting to run anything other than a
> specific cut-down kernel with a similarly cut-down userspace.
> 
> With actual hardware you might want any PCIe device (since the
> fpga can be a PCIe host).
> So whereas you might want almost any device, you probably want
> almost none of them.
> 
> So trying to build a 'one size fits all' kernel is completely doomed.

I completely agree. However I don't see how this has anything to do with
this patch, as it only allows to select the driver but doesn't do so by
default.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html