From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Kim Phillips <kim.phillips@linaro.org>
Cc: linux-kernel@vger.kernel.org, a.motakis@virtualopensystems.com,
Alexander Graf <agraf@suse.de>,
Alex Williamson <alex.williamson@redhat.com>,
stuart.yoder@freescale.com,
Wood Scott-B07421 <B07421@freescale.com>,
Sethi Varun-B16395 <B16395@freescale.com>,
Bhushan Bharat-R65777 <R65777@freescale.com>,
Peter Maydell <peter.maydell@linaro.org>,
Christoffer Dall <christoffer.dall@linaro.org>,
santosh.shukla@linaro.org, kvm@vger.kernel.org
Subject: Re: RFC: (re-)binding the VFIO platform driver to a platform device
Date: Tue, 1 Oct 2013 13:00:54 -0700 [thread overview]
Message-ID: <20131001200054.GA27330@kroah.com> (raw)
In-Reply-To: <20131001133831.6e46e8e00e09d5d9079fde57@linaro.org>
On Tue, Oct 01, 2013 at 01:38:31PM -0500, Kim Phillips wrote:
> Hi,
>
> Santosh and I are having a problem figuring out how to enable binding
> (and re-binding) platform devices to a platform VFIO driver (see
> Antonis' WIP: [1]) in an upstream-acceptable manner.
>
> Binding platform drivers currently depends on a string match in the
> device node's compatible entry. On an arndale, one can currently
> rebind the same device to the same driver like so:
>
> echo 12ce0000.i2c > /sys/bus/platform/drivers/s3c-i2c/12ce0000.i2c/driver/unbind
> echo 12ce0000.i2c > /sys/bus/platform/drivers/s3c-i2c/bind
>
> And one can bind it to the vfio-dt driver, as Antonis instructs, by
> appending a 'vfio-dt' string to the device tree compatible entry for
> the device. Then this would work:
>
> echo 12ce0000.i2c > /sys/bus/platform/drivers/s3c-i2c/12ce0000.i2c/driver/unbind
> echo 12ce0000.i2c > /sys/bus/platform/drivers/vfio-dt/bind
>
> Consequently, the hack patch below [2] allows any platform device to be
> bound to the vfio-dt driver, without making changes to the device
> tree. It's a hack because I don't see having any driver name specific
> code in drivers/base/bus.c being upstream acceptable.
You are correct.
What is wrong with just doing the above unbind/bind things through
sysfs, that is what it is there for, right?
greg k-h
next prev parent reply other threads:[~2013-10-01 20:00 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-01 18:38 RFC: (re-)binding the VFIO platform driver to a platform device Kim Phillips
2013-10-01 19:15 ` Scott Wood
2013-10-01 19:17 ` Scott Wood
2013-10-01 22:01 ` Kim Phillips
2013-10-01 21:59 ` Kim Phillips
2013-10-01 22:44 ` Scott Wood
2013-10-01 20:00 ` Greg Kroah-Hartman [this message]
2013-10-01 22:02 ` Kim Phillips
2013-10-02 1:53 ` Christoffer Dall
2013-10-02 2:35 ` Alex Williamson
2013-10-02 15:14 ` Christoffer Dall
2013-10-02 15:29 ` Alex Williamson
2013-10-02 18:25 ` Yoder Stuart-B08248
2013-10-02 18:32 ` Scott Wood
2013-10-02 18:43 ` Christoffer Dall
2013-10-02 20:04 ` Kim Phillips
2013-10-02 20:13 ` Christoffer Dall
2013-10-02 20:19 ` Scott Wood
2013-10-02 20:14 ` Scott Wood
2013-10-02 20:27 ` Christoffer Dall
2013-10-02 20:39 ` gregkh
2013-10-02 20:44 ` Christoffer Dall
2013-10-02 20:37 ` gregkh
2013-10-02 20:42 ` Christoffer Dall
2013-10-02 21:08 ` Scott Wood
2013-10-02 21:16 ` gregkh
2013-10-02 21:35 ` Scott Wood
2013-10-02 23:40 ` gregkh
2013-10-03 18:33 ` Scott Wood
2013-10-03 18:54 ` gregkh
2013-10-03 19:11 ` Scott Wood
2013-10-03 20:32 ` gregkh
2013-10-09 19:02 ` Yoder Stuart-B08248
2013-10-09 19:16 ` gregkh
2013-10-09 19:49 ` Scott Wood
2013-10-09 19:21 ` Scott Wood
2013-10-09 19:44 ` Yoder Stuart-B08248
2013-10-09 19:44 ` Yoder Stuart-B08248
2013-10-09 20:03 ` Scott Wood
2013-10-10 3:05 ` Kim Phillips
2013-10-10 8:01 ` Bhushan Bharat-R65777
2013-10-10 15:27 ` Scott Wood
2013-10-11 6:27 ` [PATCH 1/4] driver core: Add new device_driver flag to allow binding via sysfs only Kim Phillips
2013-10-11 6:27 ` [PATCH 2/4] driver core: platform: allow platform drivers to bind to any device Kim Phillips
2013-10-11 6:27 ` [PATCH 3/4] VFIO: pci: amend vfio-pci for explicit binding via sysfs only Kim Phillips
2013-10-11 20:43 ` Scott Wood
2013-10-11 23:17 ` Kim Phillips
2013-10-14 13:01 ` Yoder Stuart-B08248
2013-10-14 17:13 ` Scott Wood
2013-10-24 11:32 ` Bhushan Bharat-R65777
2013-10-28 17:47 ` Alex Williamson
2013-10-28 18:00 ` Scott Wood
2013-10-28 18:09 ` Scott Wood
2013-10-29 3:38 ` Bhushan Bharat-R65777
2013-10-29 3:38 ` Bhushan Bharat-R65777
2013-10-29 3:40 ` Scott Wood
2013-10-29 3:52 ` Bhushan Bharat-R65777
2013-10-29 3:52 ` Bhushan Bharat-R65777
2013-10-29 4:29 ` Scott Wood
2013-10-29 4:31 ` Bhushan Bharat-R65777
2013-10-29 4:31 ` Bhushan Bharat-R65777
2013-10-29 4:35 ` Scott Wood
2013-10-29 4:45 ` Bhushan Bharat-R65777
2013-10-29 4:45 ` Bhushan Bharat-R65777
2013-10-29 4:54 ` Scott Wood
2013-10-29 6:39 ` Bhushan Bharat-R65777
2013-10-29 6:39 ` Bhushan Bharat-R65777
2013-10-11 6:27 ` [PATCH] VFIO: platform: allow the driver to bind to any device explicitly via sysfs Kim Phillips
2013-10-10 7:45 ` RFC: (re-)binding the VFIO platform driver to a platform device Bhushan Bharat-R65777
2013-10-10 7:45 ` Bhushan Bharat-R65777
2013-10-10 13:43 ` Yoder Stuart-B08248
2013-10-10 13:43 ` Yoder Stuart-B08248
2013-10-10 15:23 ` Scott Wood
2013-10-10 15:25 ` Bhushan Bharat-R65777
2013-10-10 15:25 ` Bhushan Bharat-R65777
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