to feed userspace inquery via vdpa_dev_fill(), we can follow the
same to stash config attributes in struct vdpa_device at the time
of vdpa registration.

Signed-off-by: Si-Wei Liu <redacted>
---
 drivers/vdpa/ifcvf/ifcvf_main.c      |  2 +-
 drivers/vdpa/mlx5/net/mlx5_vnet.c    |  2 +-
 drivers/vdpa/vdpa.c                  | 15 +++++++++++----
 drivers/vdpa/vdpa_sim/vdpa_sim_blk.c |  2 +-
 drivers/vdpa/vdpa_sim/vdpa_sim_net.c |  2 +-
 drivers/vdpa/vdpa_user/vduse_dev.c   |  2 +-
 drivers/vdpa/virtio_pci/vp_vdpa.c    |  3 ++-
 include/linux/vdpa.h                 |  3 ++-
 8 files changed, 20 insertions(+), 11 deletions(-)

diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index f9c0044..c54ab2c 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c

@@ -771,7 +771,7 @@ static int ifcvf_vdpa_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
        else
                ret = dev_set_name(&vdpa_dev->dev, "vdpa%u", vdpa_dev->index);

-       ret = _vdpa_register_device(&adapter->vdpa, vf->nr_vring);
+       ret = _vdpa_register_device(&adapter->vdpa, vf->nr_vring, config);
        if (ret) {
                put_device(&adapter->vdpa.dev);
                IFCVF_ERR(pdev, "Failed to register to vDPA bus");

diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 9091336..376082e 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c

@@ -3206,7 +3206,7 @@ static int mlx5_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name,
        mlx5_notifier_register(mdev, &ndev->nb);
        ndev->nb_registered = true;
        mvdev->vdev.mdev = &mgtdev->mgtdev;
-       err = _vdpa_register_device(&mvdev->vdev, max_vqs + 1);
+       err = _vdpa_register_device(&mvdev->vdev, max_vqs + 1, add_config);
        if (err)
                goto err_reg;

diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index febdc99..566c1c6 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c

@@ -215,11 +215,16 @@ static int vdpa_name_match(struct device *dev, const void *data)
        return (strcmp(dev_name(&vdev->dev), data) == 0);
 }

-static int __vdpa_register_device(struct vdpa_device *vdev, u32 nvqs)
+static int __vdpa_register_device(struct vdpa_device *vdev, u32 nvqs,
+                                 const struct vdpa_dev_set_config *cfg)
 {
        struct device *dev;

        vdev->nvqs = nvqs;
+       if (cfg)
+               vdev->vdev_cfg = *cfg;
+       else
+               vdev->vdev_cfg.mask = 0ULL;