On 9/21/2022 7:43 PM, Jason Wang wrote:
This patch implements features provisioning for vdpa_sim_net.
1) validating the provisioned features to be a subset of the parent
features.
2) clearing the features that is not wanted by the userspace
For example:
# vdpa mgmtdev show
vdpasim_net:
supported_classes net
max_supported_vqs 3
dev_features MTU MAC CTRL_VQ CTRL_MAC_ADDR ANY_LAYOUT VERSION_1 ACCESS_PLATFORM
Sighs, not to blame any one and it's perhaps too late, but this
"dev_features" attr in "mgmtdev show" command output should have been
called "supported_features" in the first place.
1) provision vDPA device with all features that are supported by the
net simulator
# vdpa dev add name dev1 mgmtdev vdpasim_net
# vdpa dev config show
dev1: mac 00:00:00:00:00:00 link up link_announce false mtu 1500
negotiated_features MTU MAC CTRL_VQ CTRL_MAC_ADDR VERSION_1 ACCESS_PLATFORM
Maybe not in this patch, but for completeness for the whole series,
could we also add device_features to the output?
When simply look at the "vdpa dev config show" output, I cannot really
tell the actual device_features that was used in vdpa creation. For e.g.
there is a missing feature ANY_LAYOUT from negotiated_features compared
with supported_features in mgmtdev, but the orchestration software
couldn't tell if the vdpa device on destination host should be created
with or without the ANY_LAYOUT feature.
Thanks,
-Siwei
2) provision vDPA device with a subset of the features
# vdpa dev add name dev1 mgmtdev vdpasim_net device_features 0x300020000
# vdpa dev config show
dev1: mac 00:00:00:00:00:00 link up link_announce false mtu 1500
negotiated_features CTRL_VQ VERSION_1 ACCESS_PLATFORM
Reviewed-by: Eli Cohen <elic@xxxxxxxxxx>
Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
---
drivers/vdpa/vdpa_sim/vdpa_sim_net.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
index 886449e88502..a9ba02be378b 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
@@ -254,6 +254,14 @@ static int vdpasim_net_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
dev_attr.work_fn = vdpasim_net_work;
dev_attr.buffer_size = PAGE_SIZE;
+ if (config->mask & BIT_ULL(VDPA_ATTR_DEV_FEATURES)) {
+ if (config->device_features &
+ ~dev_attr.supported_features)
+ return -EINVAL;
+ dev_attr.supported_features &=
+ config->device_features;
+ }
+
simdev = vdpasim_create(&dev_attr);
if (IS_ERR(simdev))
return PTR_ERR(simdev);
@@ -294,7 +302,8 @@ static struct vdpa_mgmt_dev mgmt_dev = {
.id_table = id_table,
.ops = &vdpasim_net_mgmtdev_ops,
.config_attr_mask = (1 << VDPA_ATTR_DEV_NET_CFG_MACADDR |
- 1 << VDPA_ATTR_DEV_NET_CFG_MTU),
+ 1 << VDPA_ATTR_DEV_NET_CFG_MTU |
+ 1 << VDPA_ATTR_DEV_FEATURES),
.max_supported_vqs = VDPASIM_NET_VQ_NUM,
.supported_features = VDPASIM_NET_FEATURES,
};
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