From: Andrew Lunn <andrew@lunn.ch>
To: Diana Craciun <diana.craciun@oss.nxp.com>
Cc: linux-kernel@vger.kernel.org, stuyoder@gmail.com,
gregkh@linuxfoundation.org, leoyang.li@nxp.com,
Bharat Bhushan <Bharat.Bhushan@nxp.com>,
linux-arm-kernel@lists.infradead.org, laurentiu.tudor@nxp.com
Subject: Re: [PATCH v2 03/12] bus/fsl-mc: add support for 'driver_override' in the mc-bus
Date: Thu, 7 May 2020 15:34:10 +0200 [thread overview]
Message-ID: <20200507133410.GN208718@lunn.ch> (raw)
In-Reply-To: <20200507073431.2710-4-diana.craciun@oss.nxp.com>
On Thu, May 07, 2020 at 10:34:22AM +0300, Diana Craciun wrote:
> From: Bharat Bhushan <Bharat.Bhushan@nxp.com>
>
> This patch is required for vfio-fsl-mc meta driver to successfully bind
> layerscape container devices for device passthrough. This patch adds
> a mechanism to allow a layerscape device to specify a driver rather than
> a layerscape driver provide a device match.
>
> Example to allow a device (dprc.1) to specifically bind
> with driver (vfio-fsl-mc):
> - echo vfio-fsl-mc > /sys/bus/fsl-mc/devices/dprc.1/driver_override
> - echo dprc.1 > /sys/bus/fsl-mc/drivers/fsl_mc_dprc/unbind
> - echo dprc.1 > /sys/bus/fsl-mc/drivers/vfio-fsl-mc/bind
Hi Bharat, Diana
grep -r "/driver_override" Documentation
Documentation/ABI/testing/sysfs-bus-rpmsg:What: /sys/bus/rpmsg/devices/.../driver_override
Documentation/ABI/testing/sysfs-bus-pci:What: /sys/bus/pci/devices/.../driver_override
Documentation/ABI/testing/sysfs-bus-platform:What: /sys/bus/platform/devices/.../driver_override
Documentation/ABI/testing/sysfs-bus-css:What: /sys/bus/css/devices/.../driver_override
Documentation/ABI/testing/sysfs-bus-vmbus:What: /sys/bus/vmbus/devices/.../driver_override
Documentation/ABI/testing/sysfs-bus-amba:What: /sys/bus/amba/devices/.../driver_override
Maybe it is time to move this into the core, and avoid yet another
implementation of driver_override_store() and driver_override_show()
functions etc.
Andrew
next prev parent reply other threads:[~2020-05-07 13:34 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-07 7:34 [PATCH v2 00/12] bus/fsl-mc: Extend mc-bus driver functionalities in preparation for mc-bus VFIO support Diana Craciun
2020-05-07 7:34 ` [PATCH v2 01/12] bus/fsl-mc: Do no longer export the total number of irqs outside dprc_scan_objects Diana Craciun
2020-05-07 7:34 ` [PATCH v2 02/12] bus/fsl-mc: Add a new parameter to dprc_scan_objects function Diana Craciun
2020-05-07 7:34 ` [PATCH v2 03/12] bus/fsl-mc: add support for 'driver_override' in the mc-bus Diana Craciun
2020-05-07 13:34 ` Andrew Lunn [this message]
2020-05-07 7:34 ` [PATCH v2 04/12] bus/fsl-mc: Set the QMAN/BMAN region flags Diana Craciun
2020-05-07 7:34 ` [PATCH v2 05/12] bus/fsl-mc: Cache the DPRC API version Diana Craciun
2020-05-07 7:34 ` [PATCH v2 06/12] bus/fsl-mc: Add dprc-reset-container support Diana Craciun
2020-05-07 7:34 ` [PATCH v2 07/12] bus/fsl-mc: Export a dprc scan function to be used by multiple entities Diana Craciun
2020-05-07 7:34 ` [PATCH v2 08/12] bus/fsl-mc: Export a cleanup function for DPRC Diana Craciun
2020-05-07 7:34 ` [PATCH v2 09/12] bus/fsl-mc: Add a container setup function Diana Craciun
2020-05-07 7:34 ` [PATCH v2 10/12] bus/fsl_mc: Do not rely on caller to provide non NULL mc_io Diana Craciun
2020-05-07 7:34 ` [PATCH v2 11/12] bus/fsl-mc: Export IRQ pool handling functions to be used by VFIO Diana Craciun
2020-05-07 7:34 ` [PATCH v2 12/12] bus/fsl-mc: Extend ICID size from 16bit to 32bit Diana Craciun
2020-05-13 8:33 ` [PATCH v2 00/12] bus/fsl-mc: Extend mc-bus driver functionalities in preparation for mc-bus VFIO support Laurentiu Tudor
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