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Message-ID: <5b9340a9-35b0-aa97-bb5e-c99d7320b386@redhat.com>
Date: Tue, 24 Sep 2019 19:23:16 +0800
From: Jason Wang <jasowang@...hat.com>
To: Parav Pandit <parav@...lanox.com>,
"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
"linux-s390@...r.kernel.org" <linux-s390@...r.kernel.org>,
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<intel-gvt-dev@...ts.freedesktop.org>,
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"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>,
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Subject: Re: [PATCH 1/6] mdev: class id support
On 2019/9/24 上午5:02, Parav Pandit wrote:
> 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/
My understanding is this could be done on top and may require uevent
support for the bus. I can try to implement this in V2.
Thanks
>
>
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