linux-kernel - Re: RFC: (re-)binding the VFIO platform driver to a platform device

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Message-ID: <20131002203735.GA10871@kroah.com>
Date:	Wed, 2 Oct 2013 13:37:35 -0700
From:	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
To:	Christoffer Dall <christoffer.dall@...aro.org>
Cc:	Scott Wood <scottwood@...escale.com>,
	Yoder Stuart-B08248 <B08248@...escale.com>,
	Alex Williamson <alex.williamson@...hat.com>,
	Kim Phillips <kim.phillips@...aro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"a.motakis@...tualopensystems.com" <a.motakis@...tualopensystems.com>,
	"agraf@...e.de" <agraf@...e.de>,
	Wood Scott-B07421 <B07421@...escale.com>,
	Sethi Varun-B16395 <B16395@...escale.com>,
	Bhushan Bharat-R65777 <R65777@...escale.com>,
	"peter.maydell@...aro.org" <peter.maydell@...aro.org>,
	"santosh.shukla@...aro.org" <santosh.shukla@...aro.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>
Subject: Re: RFC: (re-)binding the VFIO platform driver to a platform device

On Wed, Oct 02, 2013 at 11:43:30AM -0700, Christoffer Dall wrote:
> > What's wrong with a non-vfio-specific flag that a driver can set, that
> > indicates that the driver is willing to try to bind to any device on the
> > bus if explicitly requested via the existing sysfs bind mechanism?
> > 
> It sounds more hackish to me to invent some 'generic' flag to solve a
> very specific case.  What you're suggesting would let users specify that
> a serial driver should handle a NIC hardware, no?  That sounds much much
> worse to me.

You can do that today, with any PCI driver (or USB driver as well), just
use the bind/unbind files in sysfs and you had better "know" what you
are doing...

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