My newly compiled kernel loses Networking in qemu

I compiled a kernel from source :make defconfigmake kvmconfigmake -j 4After this , i use the resulting bzImage for my qemu command:qemu-system-x86_64 -hda debian.img -kernel bzImage -append "root=/dev/sda console=ttyS0" -nographic -m 4096 -smp 2 --enable-kvm -net user,hostfwd=tcp::10021-:22 -net nicIt mounts, and I get a shell and everything, but it loses connectivity. In qemu, it logs :[FAILED] Failed to start Raise network interfaces.See 'systemctl status networking.service' for details.Can someone guide me on this ? I already consulted Linux vanilla kernel on QEMU and networking with eth0 but it does not solve my issue. Also, Im not looking for hardcore qemu-bridge-solutions. Im pretty sure some network drivers are not getting loaded , but I can't figure out how to resolve it. Or maybe Im missing some kernel .config options.