Description of problem:

These features are supported (the ebpf will be supported soon, the patches were accepted for QEMU 6.1), but can't be controlled from the libvirt profile.

For RSS and hash report this is simple - just support respective attributes and propagate them to the command line
For BPF this is more complicated: QEMU is not able to load the EBPF when runs under libvirt so the QEMU needs libvirt assistance for loading the EBPF and providing respective file descriptors to QEMU. To simplify the task probably we need to add QEMU command-line switch to just load the ebpf and return file descriptors (or create QEMU helper for the same)