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Date:   Mon, 23 Sep 2019 21:02:38 +0000
From:   Parav Pandit <parav@...lanox.com>
To:     Jason Wang <jasowang@...hat.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-s390@...r.kernel.org" <linux-s390@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>,
        "intel-gvt-dev@...ts.freedesktop.org" 
        <intel-gvt-dev@...ts.freedesktop.org>,
        "kwankhede@...dia.com" <kwankhede@...dia.com>,
        "alex.williamson@...hat.com" <alex.williamson@...hat.com>,
        "mst@...hat.com" <mst@...hat.com>,
        "tiwei.bie@...el.com" <tiwei.bie@...el.com>
CC:     "virtualization@...ts.linux-foundation.org" 
        <virtualization@...ts.linux-foundation.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "cohuck@...hat.com" <cohuck@...hat.com>,
        "maxime.coquelin@...hat.com" <maxime.coquelin@...hat.com>,
        "cunming.liang@...el.com" <cunming.liang@...el.com>,
        "zhihong.wang@...el.com" <zhihong.wang@...el.com>,
        "rob.miller@...adcom.com" <rob.miller@...adcom.com>,
        "xiao.w.wang@...el.com" <xiao.w.wang@...el.com>,
        "haotian.wang@...ive.com" <haotian.wang@...ive.com>,
        "zhenyuw@...ux.intel.com" <zhenyuw@...ux.intel.com>,
        "zhi.a.wang@...el.com" <zhi.a.wang@...el.com>,
        "jani.nikula@...ux.intel.com" <jani.nikula@...ux.intel.com>,
        "joonas.lahtinen@...ux.intel.com" <joonas.lahtinen@...ux.intel.com>,
        "rodrigo.vivi@...el.com" <rodrigo.vivi@...el.com>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "farman@...ux.ibm.com" <farman@...ux.ibm.com>,
        "pasic@...ux.ibm.com" <pasic@...ux.ibm.com>,
        "sebott@...ux.ibm.com" <sebott@...ux.ibm.com>,
        "oberpar@...ux.ibm.com" <oberpar@...ux.ibm.com>,
        "heiko.carstens@...ibm.com" <heiko.carstens@...ibm.com>,
        "gor@...ux.ibm.com" <gor@...ux.ibm.com>,
        "borntraeger@...ibm.com" <borntraeger@...ibm.com>,
        "akrowiak@...ux.ibm.com" <akrowiak@...ux.ibm.com>,
        "freude@...ux.ibm.com" <freude@...ux.ibm.com>,
        "lingshan.zhu@...el.com" <lingshan.zhu@...el.com>,
        Ido Shamay <idos@...lanox.com>,
        "eperezma@...hat.com" <eperezma@...hat.com>,
        "lulu@...hat.com" <lulu@...hat.com>
Subject: RE: [PATCH 1/6] mdev: class id support

Hi Jason,


> -----Original Message-----
> From: Jason Wang <jasowang@...hat.com>
> Sent: Monday, September 23, 2019 8:03 AM
> To: kvm@...r.kernel.org; linux-s390@...r.kernel.org; linux-
> kernel@...r.kernel.org; dri-devel@...ts.freedesktop.org; intel-
> gfx@...ts.freedesktop.org; intel-gvt-dev@...ts.freedesktop.org;
> kwankhede@...dia.com; alex.williamson@...hat.com; mst@...hat.com;
> tiwei.bie@...el.com
> Cc: virtualization@...ts.linux-foundation.org; netdev@...r.kernel.org;
> cohuck@...hat.com; maxime.coquelin@...hat.com;
> cunming.liang@...el.com; zhihong.wang@...el.com;
> rob.miller@...adcom.com; xiao.w.wang@...el.com;
> haotian.wang@...ive.com; zhenyuw@...ux.intel.com; zhi.a.wang@...el.com;
> jani.nikula@...ux.intel.com; joonas.lahtinen@...ux.intel.com;
> rodrigo.vivi@...el.com; airlied@...ux.ie; daniel@...ll.ch;
> farman@...ux.ibm.com; pasic@...ux.ibm.com; sebott@...ux.ibm.com;
> oberpar@...ux.ibm.com; heiko.carstens@...ibm.com; gor@...ux.ibm.com;
> borntraeger@...ibm.com; akrowiak@...ux.ibm.com; freude@...ux.ibm.com;
> lingshan.zhu@...el.com; Ido Shamay <idos@...lanox.com>;
> eperezma@...hat.com; lulu@...hat.com; Parav Pandit
> <parav@...lanox.com>; Jason Wang <jasowang@...hat.com>
> Subject: [PATCH 1/6] mdev: class id support
> 
> Mdev bus only supports vfio driver right now, so it doesn't implement match
> method. But in the future, we may add drivers other than vfio, one example is
> virtio-mdev[1] driver. This means we need to add device class id support in bus
> match method to pair the mdev device and mdev driver correctly.
> 
> So this patch adds id_table to mdev_driver and class_id for mdev parent with
> the match method for mdev bus.
> 
> Signed-off-by: Jason Wang <jasowang@...hat.com>
> ---
>  Documentation/driver-api/vfio-mediated-device.rst |  7 +++++--
>  drivers/gpu/drm/i915/gvt/kvmgt.c                  |  2 +-
>  drivers/s390/cio/vfio_ccw_ops.c                   |  2 +-
>  drivers/s390/crypto/vfio_ap_ops.c                 |  3 ++-
>  drivers/vfio/mdev/mdev_core.c                     | 14 ++++++++++++--
>  drivers/vfio/mdev/mdev_driver.c                   | 14 ++++++++++++++
>  drivers/vfio/mdev/mdev_private.h                  |  1 +
>  drivers/vfio/mdev/vfio_mdev.c                     |  6 ++++++
>  include/linux/mdev.h                              |  7 ++++++-
>  include/linux/mod_devicetable.h                   |  8 ++++++++
>  samples/vfio-mdev/mbochs.c                        |  2 +-
>  samples/vfio-mdev/mdpy.c                          |  2 +-
>  samples/vfio-mdev/mtty.c                          |  2 +-
>  13 files changed, 59 insertions(+), 11 deletions(-)
> 
You additionally need modpost support for id table integration to modifo, modprobe and other tools.
A small patch similar to this one [1] is needed.
Please include in the series.

[1] https://lore.kernel.org/patchwork/patch/1046991/


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