[0/2] allow userspace to query device features

Message

Zhu, Lingshan Aug. 15, 2022, 9:26 a.m. UTC

This series allows userspace to query device features of
a vDPA device through a new netlink attr
VDPA_ATTR_VDPA_DEV_SUPPORTED_FEATURES

This series also make some fields of virtio-net 
device config space conditional on the feature bits,
this means:

MTU should be conditional on VIRTIO_F_NET_MTU
MAC should be conditional on VIRTIO_F_NET_MAC
MQ should be conditional on VIRTIO_F_NET_MQ

For details, please refer to commit message
of patch 2/2

Thanks!

Zhu Lingshan (2):
  vDPA: allow userspace to query features of a vDPA device
  vDPA: conditionally read fields in virtio-net dev

 drivers/vdpa/vdpa.c       | 71 +++++++++++++++++++++++++++++++--------
 include/uapi/linux/vdpa.h |  3 ++
 2 files changed, 60 insertions(+), 14 deletions(-)