Xen project Mailing List

Re: Enable audio virtualization in Xen

To: "christopher.w.clark@xxxxxxxxx" <christopher.w.clark@xxxxxxxxx>

From: "SHARMA, JYOTIRMOY" <JYOTIRMOY.SHARMA@xxxxxxx>

Date: Fri, 12 Aug 2022 09:27:35 +0000

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Thread-topic: Re: Enable audio virtualization in Xen

[AMD Official Use Only - General]

Hello Christopher,

Thank you so much for your reply. I will execute your steps and first try to enable pulse audio as you have mentioned.

Later I will try to enable ALSA which is my final requirement.

Meanwhile, I was reading up on virtio-snd and found some patches in the internet. However, those patches are not

present in the qemu source code (https://gitlab.com/qemu-project/qemu.git). Do you know

If virtio-snd front end driver is another option to enable audio in HVM guest with Qemu/ALSA as backend in dom0?
If yes, how is it different from xen front end drivers?

Also, regarding enabling Xen PV audio front end device drivers, you have mentioned that I need to enable backend using libxenbe and snd_be. Does it mean, in this case, Qemu is not involved in the audio backend? Any pointers to understand this overall architecture (Xen PV audio front end driver/snd_be/qemu/ALSA) will be extremely helpful.

Regards,

Jyotirmoy