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[RFC PATCH 0/2] Vhost-vdpa Shadow Virtqueue Hash calculation Support
From: |
Hawkins Jiawei |
Subject: |
[RFC PATCH 0/2] Vhost-vdpa Shadow Virtqueue Hash calculation Support |
Date: |
Fri, 11 Aug 2023 22:50:48 +0800 |
This series enables shadowed CVQ to intercept
VIRTIO_NET_CTRL_MQ_HASH_CONFIG command through shadowed CVQ,
update the virtio NIC device model so qemu send it in a
migration, and the restore of that Hash calculation state
in the destination.
Note that this patch should be based on
patch "vdpa: Send all CVQ state load commands in parallel" at [1].
[1]. https://lore.kernel.org/all/cover.1689748694.git.yin31149@gmail.com/
TestStep
========
1. test the migration using vp-vdpa device
- For L0 guest, boot QEMU with two virtio-net-pci net device with
`ctrl_vq`, `mq`, `hash` features on, command line like:
-netdev tap,...
-device virtio-net-pci,disable-legacy=on,disable-modern=off,
iommu_platform=on,mq=on,ctrl_vq=on,hash=on,guest_announce=off,
indirect_desc=off,queue_reset=off,...
- For L1 guest, apply the relative patch series and compile the
source code, start QEMU with two vdpa device with svq mode on,
enable the `ctrl_vq`, `mq`, `hash` features on, command line like:
-netdev type=vhost-vdpa,x-svq=true,...
-device virtio-net-pci,mq=on,guest_announce=off,ctrl_vq=on,
hash=on,...
- For L2 source guest, run the following bash command:
```bash
#!/bin/sh
ethtool -K eth0 rxhash on
```
- Gdb attach the destination VM and break at the
vhost_vdpa_net_load_rss()
- Execute the live migration in L2 source monitor
- Result
* with this series, gdb can hit the breakpoint and continue
the executing without triggering any error or warning.
Hawkins Jiawei (2):
vdpa: Restore hash calculation state
vdpa: Allow VIRTIO_NET_F_HASH_REPORT in SVQ
net/vhost-vdpa.c | 89 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 89 insertions(+)
--
2.25.1
- [RFC PATCH 0/2] Vhost-vdpa Shadow Virtqueue Hash calculation Support,
Hawkins Jiawei <=