device: 0.839
graphic: 0.268
performance: 0.214
files: 0.162
semantic: 0.116
boot: 0.101
network: 0.092
permissions: 0.086
socket: 0.046
debug: 0.045
PID: 0.044
other: 0.016
vnc: 0.014
KVM: 0.002

How to create Rootfs for sifive_u machine