在 2022/4/8 20:28, Maxime Coquelin 写道:
The goal of this series is to add support for Virtio RSS feature to the Vhost-user backend. First patches are preliminary reworks to support variable RSS key and indirection table length. eBPF change only adds checks on whether the key length is 40B, it does not add support for longer keys. Vhost-user implementation supports up to 52B RSS key, in order to match with the maximum supported by physical NICs (Intel E810). Idea is that it could be used for application like Virtio-forwarder, by programming the Virtio device RSS key into the physical NIC and let the physical NIC do the packets distribution. DPDK Vhost-user backend PoC implementing the new requests can be found here [0], it only implements the messages handling, it does not perform any RSS for now. [0]: https://gitlab.com/mcoquelin/dpdk-next-virtio/-/commits/vhost_user_rss_poc/
Not directly related to this series. I wonder if vhost-user consider to support control virtqueue then all the RSS stuffs could be done at vhost-user backend without introducing new commands.
Thanks
Maxime Coquelin (5): ebpf: pass and check RSS key length to the loader virtio-net: prepare for variable RSS key and indir table lengths virtio-net: add RSS support for Vhost backends docs: introduce RSS support in Vhost-user specification vhost-user: add RSS support docs/interop/vhost-user.rst | 57 ++++++++++++ ebpf/ebpf_rss-stub.c | 3 +- ebpf/ebpf_rss.c | 17 ++-- ebpf/ebpf_rss.h | 3 +- hw/net/vhost_net-stub.c | 10 ++ hw/net/vhost_net.c | 22 +++++ hw/net/virtio-net.c | 87 +++++++++++++----- hw/virtio/vhost-user.c | 146 +++++++++++++++++++++++++++++- include/hw/virtio/vhost-backend.h | 7 ++ include/hw/virtio/virtio-net.h | 16 +++- include/migration/vmstate.h | 10 ++ include/net/vhost_net.h | 4 + 12 files changed, 344 insertions(+), 38 deletions(-)
