I'm proposing to add a feature to offload virtio-net RSS/hash report to Linux. This series contain patches to utilize the proposed Linux feature. The patches for Linux are available at: https://lore.kernel.org/r/20250307-rss-v9-0-df7662402...@daynix.com/
Note that the referenced patches for Linux implement UAPIs that are compatible with older versions of this series but not compatible with this version. Compatible patches for Linux will be posted shortly. This work was presented at LPC 2024: https://lpc.events/event/18/contributions/1963/ Patch "docs/devel/ebpf_rss.rst: Update for peer RSS" provides comparion of existing RSS mechanism and the new one (called "peer RSS") and explains how QEMU selects one. --- Changes in v5: - Changed UAPIs. - Rebased. - Link to v4: https://lore.kernel.org/qemu-devel/20250313-hash-v4-0-c75c494b4...@daynix.com Changes in v4: - Rebased. - Added a reference to the documentation to the cover letter. - Link to v3: https://lore.kernel.org/r/20240915-hash-v3-0-79cb08d28...@daynix.com --- Akihiko Odaki (5): net: Allow configuring virtio hashing virtio-net: Offload hashing to peer virtio-net: Offload hashing without vhost tap: Report virtio-net hashing support on Linux docs/devel/ebpf_rss.rst: Update for peer RSS docs/devel/ebpf_rss.rst | 22 ++++++++----- include/net/net.h | 13 ++++++++ net/tap-linux.h | 4 +++ net/tap_int.h | 4 +++ hw/net/virtio-net.c | 84 ++++++++++++++++++++++++++++++++++++++----------- net/net.c | 11 +++++++ net/tap-bsd.c | 15 +++++++++ net/tap-linux.c | 16 ++++++++++ net/tap-solaris.c | 15 +++++++++ net/tap-stub.c | 15 +++++++++ net/tap.c | 23 ++++++++++++++ net/vhost-vdpa.c | 13 ++++++++ 12 files changed, 209 insertions(+), 26 deletions(-) --- base-commit: f0737158b483e7ec2b2512145aeab888b85cc1f7 change-id: 20240828-hash-628329a45d4d prerequisite-change-id: 20250530-vdpa-2c481c64ce45:v1 prerequisite-patch-id: a8c36f25d07b2b1a658ec3189bdf8bf12ef5ce8d prerequisite-patch-id: 414474fbb325338338f2d84f7065be241c27df2b prerequisite-patch-id: 6db7f777008d6d1fae86df2a1fffcd2ddb394e05 prerequisite-patch-id: 762aad5a811163b3d9326870bb751fbe7853c21c prerequisite-patch-id: 9dfcea59addbdebfc1cc8fda26c91ebf21482d21 prerequisite-patch-id: 3d391c14efe64541a881421735cf9ff04bb69713 Best regards, -- Akihiko Odaki <akihiko.od...@daynix.com>
