[Sound-open-firmware] DSP VM to x86 VM communication in QEMU

[Fletcher Woodruff]

I'm looking into implementing a feature to allow mapping shared memory
in a VM host into a guest for audio playback.

I've seen there's some related work in SoF's qemu repo for
communicating between an x86 VM and a DSP VM, and I was wondering if
anyone had more context/documentation on those features?

Thanks,
Fletcher