This is intended to be used with VSOCK, to notify the hypervisor/VMM, eg on the host: qemu <...> -smbios type=11,value=io.systemd.credential:vmm.notify_socket=vsock:2:1234 -device vhost-vsock-pci,id=vhost-vsock-pci0,guest-cid=42 (vsock:2:1234 -> send to host on vsock port 1234, default is to send to 0 which is the hypervisor itself) Also on the host: $ socat - VSOCK-LISTEN:1234,socktype=5 READY=1 STATUS=Ready.
System and Service Manager
Details
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