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| author | Laurent Vivier <lvivier@redhat.com> | 2025-07-09 10:24:25 +0200 |
|---|---|---|
| committer | Jason Wang <jasowang@redhat.com> | 2025-07-14 13:27:09 +0800 |
| commit | da703b06a52bfb5fe1a77b0eddbb8d68d3f70762 (patch) | |
| tree | 97df1e10e1f8611b1f27a0f86e2be91cff695a36 /docs/system | |
| parent | 854ee02b22220377f3fa3806adf7e0718c3a5c5a (diff) | |
| download | focaccia-qemu-da703b06a52bfb5fe1a77b0eddbb8d68d3f70762.tar.gz focaccia-qemu-da703b06a52bfb5fe1a77b0eddbb8d68d3f70762.zip | |
net/passt: Implement vhost-user backend support
This commit adds support for the vhost-user interface to the passt network backend, enabling high-performance, accelerated networking for guests using passt. The passt backend can now operate in a vhost-user mode, where it communicates with the guest's virtio-net device over a socket pair using the vhost-user protocol. This offloads the datapath from the main QEMU loop, significantly improving network performance. When the vhost-user=on option is used with -netdev passt, the new vhost initialization path is taken instead of the standard stream-based connection. Signed-off-by: Laurent Vivier <lvivier@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'docs/system')
| -rw-r--r-- | docs/system/devices/net.rst | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/docs/system/devices/net.rst b/docs/system/devices/net.rst index c586ee0f40..4d787c3aeb 100644 --- a/docs/system/devices/net.rst +++ b/docs/system/devices/net.rst @@ -104,7 +104,7 @@ To use the passt backend interface There is no need to start the daemon as QEMU will do it for you. -passt is started in the socket-based mode. +By default, passt will be started in the socket-based mode. .. parsed-literal:: |qemu_system| [...OPTIONS...] -nic passt @@ -128,6 +128,16 @@ passt is started in the socket-based mode. virtio0: index=0,type=nic,model=virtio-net-pci,macaddr=9a:2b:2c:2d:2e:2f \ netdev0: index=0,type=passt,stream,connected to pid 25428 +To use the vhost-based interface, add the ``vhost-user=on`` parameter and +select the virtio-net device: + +.. parsed-literal:: + |qemu_system| [...OPTIONS...] -nic passt,model=virtio,vhost-user=on + + (qemu) info network + virtio-net-pci.0: index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:12:34:56 + \ #net006: index=0,type=passt,vhost-user,connected to pid 25731 + To use socket based passt interface: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |