Commit Graph

6 Commits

Author SHA1 Message Date
Sebastien Boeuf
8946a09afd vm-virtio: Simplify virtio-net configuration
This commit introduces a clear definition of the virtio-net
configuration structure, allowing both vhost-user-net and
virtio-net devices to rely on it.

This makes the code more readable for developers.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-01-28 10:28:14 +00:00
Cathy Zhang
652e7b9b8a vm-virtio: Implement multiple queue support for net devices
Update the common part in net_util.rs under vm-virtio to add mq
support, meanwhile enable mq for virtio-net device, vhost-user-net
device and vhost-user-net backend. Multiple threads will be created,
one thread will be responsible to handle one queue pair separately.
To gain the better performance, it requires to have the same amount
of vcpus as queue pair numbers defined for the net device, due to
the cpu affinity.

Multiple thread support is not added for vhost-user-net backend
currently, it will be added in future.

Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
2020-01-17 12:06:19 +01:00
Cathy Zhang
4ab88a8173 net_util: Add multiple queue support for tap
Add support to allow VMMs to open the same tap device many times, it will
create multiple file descriptors meanwhile.

Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
2020-01-17 12:06:19 +01:00
Cathy Zhang
cf7e0cdf95 vm-virtio: Add multiple queue handling with control queue
Current guest kernel will check the oneline cpu count, in principle,
if the online cpu count is not smaller than the number of queue pairs
VMM reported, the net packets could be put/get to all the virtqueues,
otherwise, only the number of queue pairs that match the oneline cpu
count will have packets work with. guest kernel will send command
through control queue to tell VMMs the actual queue pair numbers which
it could currently play with. Add mq process in control queue handling
to get the queue pair number, VMM will verify if it is in a valid range,
nothing else but this.

Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
2020-01-17 12:06:19 +01:00
Cathy Zhang
d38787c578 vm-virtio: Add control queue support in net_util.rs
As virtio spec 1.1 said, the driver uses the control queue
to send commands to manipulate various features of the devices,
such as VIRTIO_NET_F_MQ which is required by multiple queue
support. Here add the control queue handling process.

Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
2020-01-17 12:06:19 +01:00
Cathy Zhang
6ae2597d19 vm-virtio: Create new module to abstract common parts for net devices
There are some common logic shared among virtio-net device, vhost-user-net
device and vhost-user-net backend, abstract those parts into net_util.rs
to improve code maintainability and readability.

Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
2020-01-17 12:06:19 +01:00