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virtio-net: Added eBPF RSS to virtio-net.

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When RSS is enabled the device tries to load the eBPF program
to select RX virtqueue in the TUN. If eBPF can be loaded
the RSS will function also with vhost (works with kernel 5.8 and later).
Software RSS is used as a fallback with vhost=off when eBPF can't be loaded
or when hash population requested by the guest.

Signed-off-by: Yuri Benditovich <yuri.benditovich@daynix.com>
Signed-off-by: Andrew Melnychenko <andrew@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Andrew Melnychenko 2021-05-14 14:48:33 +03:00 • committed by Jason Wang
parent 46627f41b6
commit 0145c39348
4 changed files with 122 additions and 3 deletions
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2
net/vhost-vdpa.c
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@ -54,6 +54,8 @@ const int vdpa_feature_bits[] = {
VIRTIO_NET_F_MTU,
VIRTIO_F_IOMMU_PLATFORM,
VIRTIO_F_RING_PACKED,
VIRTIO_NET_F_RSS,
VIRTIO_NET_F_HASH_REPORT,
VIRTIO_NET_F_GUEST_ANNOUNCE,
VIRTIO_NET_F_STATUS,
VHOST_INVALID_FEATURE_BIT