> -----Original Message----- > From: Yi Wang [mailto:wang.yi59@xxxxxxxxxx] > Sent: Thursday, December 23, 2021 3:32 PM > To: mst@xxxxxxxxxx > Cc: jasowang@xxxxxxxxxx; kvm@xxxxxxxxxxxxxxx; > virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx; netdev@xxxxxxxxxxxxxxx; > linux-kernel@xxxxxxxxxxxxxxx; xue.zhihong@xxxxxxxxxx; wang.yi59@xxxxxxxxxx; > wang.liang82@xxxxxxxxxx; Zhang Min <zhang.min9@xxxxxxxxxx> > Subject: [PATCH] vdpa: regist vhost-vdpa dev class > > From: Zhang Min <zhang.min9@xxxxxxxxxx> > > Some applications like kata-containers need to acquire MAJOR/MINOR/DEVNAME > for devInfo [1], so regist vhost-vdpa dev class to expose uevent. > > 1. > https://github.com/kata-containers/kata-containers/blob/main/src/runtime/vi > rtcontainers/device/config/config.go > > Signed-off-by: Zhang Min <zhang.min9@xxxxxxxxxx> > Signed-off-by: Yi Wang <wang.yi59@xxxxxxxxxx> > --- > drivers/vhost/vdpa.c | 12 ++++++++++++ > 1 file changed, 12 insertions(+) > > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c > index fb41db3da611..90fbad93e7a2 100644 > --- a/drivers/vhost/vdpa.c > +++ b/drivers/vhost/vdpa.c > @@ -1012,6 +1012,7 @@ static void vhost_vdpa_release_dev(struct device *device) > kfree(v); > } > > +static struct class *vhost_vdpa_class; > static int vhost_vdpa_probe(struct vdpa_device *vdpa) > { > const struct vdpa_config_ops *ops = vdpa->config; > @@ -1040,6 +1041,7 @@ static int vhost_vdpa_probe(struct vdpa_device *vdpa) > v->dev.release = vhost_vdpa_release_dev; > v->dev.parent = &vdpa->dev; > v->dev.devt = MKDEV(MAJOR(vhost_vdpa_major), minor); > + v->dev.class = vhost_vdpa_class; > v->vqs = kmalloc_array(v->nvqs, sizeof(struct vhost_virtqueue), > GFP_KERNEL); > if (!v->vqs) { > @@ -1097,6 +1099,14 @@ static int __init vhost_vdpa_init(void) > { > int r; > > + vhost_vdpa_class = class_create(THIS_MODULE, "vhost-vdpa"); > + if (IS_ERR(vhost_vdpa_class)) { > + r = PTR_ERR(vhost_vdpa_class); > + pr_warn("vhost vdpa class create error %d, maybe mod reinserted\n", r); > + vhost_vdpa_class = NULL; Unnecessary to reset? > + return r; > + } > + > r = alloc_chrdev_region(&vhost_vdpa_major, 0, VHOST_VDPA_DEV_MAX, > "vhost-vdpa"); > if (r) > @@ -1111,6 +1121,7 @@ static int __init vhost_vdpa_init(void) > err_vdpa_register_driver: > unregister_chrdev_region(vhost_vdpa_major, VHOST_VDPA_DEV_MAX); > err_alloc_chrdev: > + class_destroy(vhost_vdpa_class); > return r; > } > module_init(vhost_vdpa_init); > @@ -1118,6 +1129,7 @@ module_init(vhost_vdpa_init); > static void __exit vhost_vdpa_exit(void) > { > vdpa_unregister_driver(&vhost_vdpa_driver); > + class_destroy(vhost_vdpa_class); > unregister_chrdev_region(vhost_vdpa_major, VHOST_VDPA_DEV_MAX); > } > module_exit(vhost_vdpa_exit); > -- > 2.27.0
