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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 /qemu-options.hx | |
| 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 'qemu-options.hx')
| -rw-r--r-- | qemu-options.hx | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/qemu-options.hx b/qemu-options.hx index e8252cd5e8..a3c066c678 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -2797,7 +2797,7 @@ DEFHEADING(Network options:) DEF("netdev", HAS_ARG, QEMU_OPTION_netdev, #ifdef CONFIG_PASST - "-netdev passt,id=str[,path=file][,quiet=on|off]\n" + "-netdev passt,id=str[,path=file][,quiet=on|off][,vhost-user=on|off]\n" "[,mtu=mtu][,address=addr][,netmask=mask][,mac=addr][,gateway=addr]\n" " [,interface=name][,outbound=address][,outbound-if4=name]\n" " [,outbound-if6=name][,dns=addr][,search=list][,fqdn=name]\n" @@ -2811,6 +2811,8 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev, " if 'path' is not provided 'passt' will be started according to PATH\n" " by default, informational message of passt are not displayed (quiet=on)\n" " to display this message, use 'quiet=off'\n" + " by default, passt will be started in socket-based mode, to enable vhost-mode,\n" + " use 'vhost-user=on'\n" " for details on other options, refer to passt(1)\n" " 'param' allows to pass any option defined by passt(1)\n" #endif @@ -3067,6 +3069,12 @@ SRST By default, ``quiet=on`` to disable informational message from passt. ``quiet=on`` is passed as ``--quiet`` to passt. + ``vhost-user=on|off`` + By default, ``vhost-user=off`` and QEMU uses the stream network + backend to communicate with passt. If ``vhost-user=on``, passt is + started with ``--vhost-user`` and QEMU uses the vhost-user network + backend to communicate with passt. + ``@mtu`` Assign MTU via DHCP/NDP |