This patch proposes virtio specification for new virtio sound device. Any
feedback would be greatly appreciated. Previous version of the proposal: [1].
Reference implementation is now available and located here:
* QEMU v4.1.0-rc3 device:
https://github.com/OpenSynergy/qemu/tree/virtio-snd-draft
* Linux kernel 5.2-rc7 driver:
https://github.com/OpenSynergy/linux/tree/virtio-snd-draft
How to use:
1) Set the SND_VIRTIO configuration option in Linux kernel config to
enable virtio-snd in a guest.
2) QEMU command line must contain virtio-snd-pci device configuration:
a) ALSA backend:
-audiodev id=sndbe,driver=alsa,out.try-poll=off,\
-device virtio-snd-pci
Polling mode must be disabled because QEMU will freeze until
playback is stopped.
b) PulseAudio backend:
-audiodev id=sndbe,driver=pa,server=/run/user/1000/pulse/native,\
-device virtio-snd-pci
[1]: https://lists.oasis-open.org/archives/virtio-dev/201905/msg00013.html
Signed-off-by: Anton Yakovlev <>
Signed-off-by: Mikhail Golubev <>
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