I have installed Xen 4.8.0 on an Ubuntu PC and I was able to get audio in Domain U using PCI passthrough by hot-plugging the audio device controller to Domain U using xl and loading the corresponding PCI frontend and backend modules[https://wiki.xenproject.org/wiki/Xen_PCI_Passthrough].
I wish to do the same for R-Car H3(arm64). But I was unable to select the PCI frontend and backend module during kernel building since PCI can only be selected for x86 architecture. In R-Car H3, the I2C bus is responsible to transfer sound signals from SoC to Codec. Would I have to do pass-through for I2C in order to enable sound in Domain U? Has anyone ever done or tried it before? Is there any other way to enable sound in Domain U?
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