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[PATCH v2 0/6] Support VIRTIO_F_RING_RESET for vhost-user in virtio pci-
From: |
Kangjie Xu |
Subject: |
[PATCH v2 0/6] Support VIRTIO_F_RING_RESET for vhost-user in virtio pci-modern |
Date: |
Mon, 12 Sep 2022 11:10:43 +0800 |
This patch set is based on the patch set that supports VIRTIO_F_RING_RESET for
vhost-kernel:
cover.1662916759.git.kangjie.xu@linux.alibaba.com/">https://lore.kernel.org/qemu-devel/cover.1662916759.git.kangjie.xu@linux.alibaba.com/
The virtio queue reset function has already been defined in the virtio spec 1.2.
The relevant virtio spec information is here:
https://github.com/oasis-tcs/virtio-spec/issues/124
https://github.com/oasis-tcs/virtio-spec/issues/139
The process of virtqueue reset can be concluded as:
1. The virtqueue is disabled when VIRTIO_PCI_COMMON_Q_RESET is written.
2. Then the virtqueue can be optionally restarted(re-enabled).
The detailed process is listed below:
1. VIRTIO_PCI_COMMON_Q_RESET is written [virtio-pci]
-> virtio_queue_reset() [virtio]
-> virtio_net_queue_reset() [virtio-net]
-> vhost_net_virtqueue_reset() [vhost-net]
-> vhost_virtqueue_stop()
-> __virtio_queue_reset()
2. VIRTIO_PCI_COMMON_Q_ENABLE is written [virtio-pci]
-> virtio_queue_enable() [virtio]
-> virtio_net_queue_enable() [virtio-net]
-> vhost_net_virtqueue_restart() [vhost-net]
-> vhost_virtqueue_start()
-> vhost_user_set_vring_enable [vhost-user]
-> send VHOST_USER_SET_VRING_ENABLE to the device
-> set enabled, reset status of vq.
changelog:
1. Reuse the vhost_virtqueue_stop() when resetting a vq.
Test environment:
Qemu: QEMU emulator version 7.1.50
Guest: 5.19.0-rc3 (With vq reset support)
DPDK: 22.11-rc0 (With vq reset support)
Test Cmd: ethtool -g eth1; ethtool -G eth1 rx $1 tx $2; ethtool -g eth1;
The drvier can resize the virtio queue, then virtio queue reset function
should
be triggered.
The default is split mode, modify Qemu virtio-net to add PACKED feature to
test packed mode.
Guest Kernel Patch:
https://lore.kernel.org/bpf/20220801063902.129329-1-xuanzhuo@linux.alibaba.com/
DPDK Patch:
https://github.com/middaywords/dpdk/compare/72206323a5dd3182b13f61b25a64abdddfee595c...080d9d5a6bba8ff8dce5186e2c6cb35cabef77c9
Kangjie Xu (6):
net: virtio: rename vhost_set_vring_enable to vhost_set_dev_enable
vhost-user: add op to enable or disable a single vring
vhost-net: vhost-user: update vhost_net_virtqueue_reset()
vhost-net: vhost-user: update vhost_net_virtqueue_restart()
virtio-net: vhost-user: update queue_reset and queue_enable
vhost: vhost-user: enable vq reset feature
backends/cryptodev-vhost.c | 12 ++++++------
hw/net/vhost_net-stub.c | 2 +-
hw/net/vhost_net.c | 15 +++++++++++----
hw/net/virtio-net.c | 10 ++++++----
hw/virtio/vhost-user.c | 27 +++++++++++++++++++--------
include/hw/virtio/vhost-backend.h | 5 ++++-
include/net/vhost_net.h | 2 +-
7 files changed, 48 insertions(+), 25 deletions(-)
--
2.32.0
- [PATCH v2 0/6] Support VIRTIO_F_RING_RESET for vhost-user in virtio pci-modern,
Kangjie Xu <=
- [PATCH v2 6/6] vhost: vhost-user: enable vq reset feature, Kangjie Xu, 2022/09/11
- [PATCH v2 1/6] net: virtio: rename vhost_set_vring_enable to vhost_set_dev_enable, Kangjie Xu, 2022/09/11
- [PATCH v2 2/6] vhost-user: add op to enable or disable a single vring, Kangjie Xu, 2022/09/11
- [PATCH v2 5/6] virtio-net: vhost-user: update queue_reset and queue_enable, Kangjie Xu, 2022/09/11
- [PATCH v2 4/6] vhost-net: vhost-user: update vhost_net_virtqueue_restart(), Kangjie Xu, 2022/09/11
- [PATCH v2 3/6] vhost-net: vhost-user: update vhost_net_virtqueue_reset(), Kangjie Xu, 2022/09/11