This patch allows the device features to be provisioned through
netlink. A new attribute is introduced to allow the userspace to pass
a 64bit device features during device adding.
This provides several advantages:
- Allow to provision a subset of the features to ease the cross vendor
live migration.
- Better debug-ability for vDPA framework and parent.
Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
---
drivers/vdpa/vdpa.c | 5 +++++
include/linux/vdpa.h | 1 +
include/uapi/linux/vdpa.h | 2 ++
3 files changed, 8 insertions(+)
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index c06c02704461..278e26bfa492 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -600,6 +600,11 @@ static int vdpa_nl_cmd_dev_add_set_doit(struct sk_buff *skb, struct genl_info *i
}
config.mask |= BIT_ULL(VDPA_ATTR_DEV_NET_CFG_MAX_VQP);
}
+ if (nl_attrs[VDPA_ATTR_DEV_FEATURES]) {
+ config.device_features =
+ nla_get_u64(nl_attrs[VDPA_ATTR_DEV_FEATURES]);
+ config.mask |= BIT_ULL(VDPA_ATTR_DEV_FEATURES);
+ }
/* Skip checking capability if user didn't prefer to configure any
* device networking attributes. It is likely that user might have used
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index d282f464d2f1..6d0f5e4e82c2 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -104,6 +104,7 @@ struct vdpa_iova_range {
};
struct vdpa_dev_set_config {
+ u64 device_features;
struct {
u8 mac[ETH_ALEN];
u16 mtu;
diff --git a/include/uapi/linux/vdpa.h b/include/uapi/linux/vdpa.h
index 25c55cab3d7c..9dc855f37c59 100644
--- a/include/uapi/linux/vdpa.h
+++ b/include/uapi/linux/vdpa.h
@@ -52,6 +52,8 @@ enum vdpa_attr {
VDPA_ATTR_DEV_VENDOR_ATTR_NAME, /* string */
VDPA_ATTR_DEV_VENDOR_ATTR_VALUE, /* u64 */
+ VDPA_ATTR_DEV_FEATURES, /* u64 */
+
/* new attributes must be added above here */
VDPA_ATTR_MAX,
};
--
2.25.1
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