linux-stable/drivers/vdpa/Kconfig
Parav Pandit 33b347503f vdpa: Define vdpa mgmt device, ops and a netlink interface
To add one or more VDPA devices, define a management device which
allows adding or removing vdpa device. A management device defines
set of callbacks to manage vdpa devices.

To begin with, it defines add and remove callbacks through which a user
defined vdpa device can be added or removed.

A unique management device is identified by its unique handle identified
by management device name and optionally the bus name.

Hence, introduce routine through which driver can register a
management device and its callback operations for adding and remove
a vdpa device.

Introduce vdpa netlink socket family so that user can query management
device and its attributes.

Example of show vdpa management device which allows creating vdpa device of
networking class (device id = 0x1) of virtio specification 1.1
section 5.1.1.

$ vdpa mgmtdev show
vdpasim_net:
  supported_classes:
    net

Example of showing vdpa management device in JSON format.

$ vdpa mgmtdev show -jp
{
    "show": {
        "vdpasim_net": {
            "supported_classes": [ "net" ]
        }
    }
}

Signed-off-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Eli Cohen <elic@nvidia.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210105103203.82508-4-parav@nvidia.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Including a bugfix:

vpda: correctly size vdpa_nl_policy

We need to ensure last entry of vdpa_nl_policy[]
is zero, otherwise out-of-bounds access is hurting us.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Cc: Parav Pandit <parav@nvidia.com>
Cc: Eli Cohen <elic@nvidia.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Link: https://lore.kernel.org/r/20210210134911.4119555-1-eric.dumazet@gmail.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2021-02-23 07:52:56 -05:00

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# SPDX-License-Identifier: GPL-2.0-only
menuconfig VDPA
tristate "vDPA drivers"
depends on NET
help
Enable this module to support vDPA device that uses a
datapath which complies with virtio specifications with
vendor specific control path.
if VDPA
config VDPA_SIM
tristate "vDPA device simulator core"
depends on RUNTIME_TESTING_MENU && HAS_DMA
select DMA_OPS
select VHOST_RING
help
Enable this module to support vDPA device simulators. These devices
are used for testing, prototyping and development of vDPA.
config VDPA_SIM_NET
tristate "vDPA simulator for networking device"
depends on VDPA_SIM
select GENERIC_NET_UTILS
help
vDPA networking device simulator which loops TX traffic back to RX.
config IFCVF
tristate "Intel IFC VF vDPA driver"
depends on PCI_MSI
help
This kernel module can drive Intel IFC VF NIC to offload
virtio dataplane traffic to hardware.
To compile this driver as a module, choose M here: the module will
be called ifcvf.
config MLX5_VDPA
bool
select VHOST_IOTLB
help
Support library for Mellanox VDPA drivers. Provides code that is
common for all types of VDPA drivers. The following drivers are planned:
net, block.
config MLX5_VDPA_NET
tristate "vDPA driver for ConnectX devices"
select MLX5_VDPA
depends on MLX5_CORE
help
VDPA network driver for ConnectX6 and newer. Provides offloading
of virtio net datapath such that descriptors put on the ring will
be executed by the hardware. It also supports a variety of stateless
offloads depending on the actual device used and firmware version.
endif # VDPA