device: 0.672
performance: 0.522
assembly: 0.508
architecture: 0.506
semantic: 0.499
mistranslation: 0.466
risc-v: 0.422
graphic: 0.390
hypervisor: 0.294
debug: 0.263
register: 0.241
arm: 0.231
virtual: 0.226
x86: 0.199
permissions: 0.184
boot: 0.173
files: 0.140
vnc: 0.129
i386: 0.118
user-level: 0.089
network: 0.075
ppc: 0.061
kernel: 0.041
socket: 0.028
peripherals: 0.025
VMM: 0.012
PID: 0.005
TCG: 0.003
KVM: 0.003

Amend RISCV machine default value