From 43d26c4fc6c446d766253d546f0083d78023d34a Mon Sep 17 00:00:00 2001
From: Zhi Wang <zhi.wang.linux@gmail.com>
Date: Tue, 22 Feb 2022 10:05:32 -0500
Subject: [PATCH] drm/i915/gvt: add the missing mdev attribute "name"
The mdev attribute "name" is required by some middle software, e.g.
KubeVirt, an open source SW that manages VM on Kubernetes cluster uses
the mdev sysfs directory/file structure to discover mediated device in
nodes in the cluster.
v2:
- Fix the missing defination in gvt_type_attrs. (Zhenyu)
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Hui Chun Ong <hui.chun.ong@intel.com>
Cc: Terrence Xu <terrence.xu@intel.com>
Cc: Zhi Wang <zhi.a.wang@intel.com>
Signed-off-by: Zhi Wang <zhi.wang.linux@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220222150532.9090-1-zhi.a.wang@intel.com
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
---
drivers/gpu/drm/i915/gvt/kvmgt.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index e8d6c76e92341..057ec44901045 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -188,14 +188,29 @@ static ssize_t description_show(struct mdev_type *mtype,
type->weight);
}
+static ssize_t name_show(struct mdev_type *mtype,
+ struct mdev_type_attribute *attr, char *buf)
+{
+ struct intel_vgpu_type *type;
+ struct intel_gvt *gvt = kdev_to_i915(mtype_get_parent_dev(mtype))->gvt;
+
+ type = &gvt->types[mtype_get_type_group_id(mtype)];
+ if (!type)
+ return 0;
+
+ return sprintf(buf, "%s\n", type->name);
+}
+
static MDEV_TYPE_ATTR_RO(available_instances);
static MDEV_TYPE_ATTR_RO(device_api);
static MDEV_TYPE_ATTR_RO(description);
+static MDEV_TYPE_ATTR_RO(name);
static struct attribute *gvt_type_attrs[] = {
&mdev_type_attr_available_instances.attr,
&mdev_type_attr_device_api.attr,
&mdev_type_attr_description.attr,
+ &mdev_type_attr_name.attr,
NULL,
};