This series tries to pick up the work on the virtio-net timestamping
feature from Willem de Bruijn.
Original series
Message-Id: 20210208185558.995292-1-willemdebruijn.kernel@xxxxxxxxx
Subject: [PATCH RFC v2 0/4] virtio-net: add tx-hash, rx-tstamp,
tx-tstamp and tx-time
From: Willem de Bruijn <willemb@xxxxxxxxxx>
RFC for four new features to the virtio network device:
1. pass tx flow state to host, for routing + telemetry
2. pass rx tstamp to guest, for better RTT estimation
3. pass tx tstamp to guest, idem
3. pass tx delivery time to host, for accurate pacing
All would introduce an extension to the virtio spec.
The original series consisted of a hack around the DMA API, which should
be fixed in this series.
The changes in this series are to the driver side. For the changes to qemu see:
https://github.com/strumtrar/qemu/tree/v8.1.1/virtio-net-ptp
Currently only virtio-net is supported. The original series used
vhost-net as backend. However, the path through tun via sendmsg doesn't
allow us to write data back to the driver side without any hacks.
Therefore use the way via plain virtio-net without vhost albeit better
performance.
Signed-off-by: Steffen Trumtrar <s.trumtrar@xxxxxxxxxxxxxx>
---
Willem de Bruijn (4):
virtio-net: support transmit hash report
virtio-net: support receive timestamp
virtio-net: support transmit timestamp
virtio-net: support future packet transmit time
drivers/net/virtio_net.c | 211 ++++++++++++++++++++++++++++++++++++++--
include/uapi/linux/virtio_net.h | 24 ++++-
2 files changed, 228 insertions(+), 7 deletions(-)
---
base-commit: b85ea95d086471afb4ad062012a4d73cd328fa86
change-id: 20231218-v6-7-topic-virtio-net-ptp-3df023bc4f4d
Best regards,
--
Steffen Trumtrar <s.trumtrar@xxxxxxxxxxxxxx>
