From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com ([209.132.183.28]:56592 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726918AbfIQMHg (ORCPT ); Tue, 17 Sep 2019 08:07:36 -0400 Date: Tue, 17 Sep 2019 14:07:20 +0200 From: Cornelia Huck Subject: Re: [RFC PATCH 1/2] mdev: device id support Message-ID: <20190917140720.3686e0cc.cohuck@redhat.com> In-Reply-To: <20190912094012.29653-2-jasowang@redhat.com> References: <20190912094012.29653-1-jasowang@redhat.com> <20190912094012.29653-2-jasowang@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-s390-owner@vger.kernel.org List-ID: To: Jason Wang Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, kwankhede@nvidia.com, alex.williamson@redhat.com, mst@redhat.com, zhenyuw@linux.intel.com, zhi.a.wang@intel.com, jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com, rodrigo.vivi@intel.com, airlied@linux.ie, daniel@ffwll.ch, farman@linux.ibm.com, pasic@linux.ibm.com, sebott@linux.ibm.com, oberpar@linux.ibm.com, heiko.carstens@de.ibm.com, gor@linux.ibm.com, borntraeger@de.ibm.com, akrowiak@linux.ibm.com, pmorel@linux.ibm.com, freude@linux.ibm.com, tiwei.bie@intel.com, virtualization@lists.linux-foundation.org, maxime.coquelin@redhat.com, cunming.liang@intel.com, zhihong.wang@intel.com, rob.miller@broadcom.com, idos@mellanox.com, xiao.w.wang@intel.com, lingshan.zhu@intel.com On Thu, 12 Sep 2019 17:40:11 +0800 Jason Wang wrote: > Mdev bus only support 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 > id support in bus match method to pair the mdev device and mdev driver > correctly. Sounds reasonable. > > So this patch add id_table to mdev_driver and id for mdev parent, and > implement the match method for mdev bus. > > [1] https://lkml.org/lkml/2019/9/10/135 > > Signed-off-by: Jason Wang > --- > 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 | 6 +++++- > include/linux/mod_devicetable.h | 6 ++++++ > samples/vfio-mdev/mbochs.c | 2 +- > samples/vfio-mdev/mdpy.c | 2 +- > samples/vfio-mdev/mtty.c | 2 +- > 12 files changed, 51 insertions(+), 9 deletions(-) (...) The transformations of the vendor drivers and the new interface look sane. (...) > diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h > index 5714fd35a83c..f1fc143df042 100644 > --- a/include/linux/mod_devicetable.h > +++ b/include/linux/mod_devicetable.h > @@ -821,4 +821,10 @@ struct wmi_device_id { > const void *context; > }; > > +/* MDEV */ > + Maybe add some kerneldoc and give vfio as an example of what we're matching here? > +struct mdev_device_id { > + __u8 id; I agree with the suggestion to rename this to 'class_id'. > +}; > + > #endif /* LINUX_MOD_DEVICETABLE_H */