device: 0.686
peripherals: 0.392
performance: 0.341
i386: 0.295
user-level: 0.245
virtual: 0.221
architecture: 0.218
network: 0.208
semantic: 0.198
mistranslation: 0.187
x86: 0.182
arm: 0.126
boot: 0.104
VMM: 0.074
TCG: 0.072
KVM: 0.051
PID: 0.043
debug: 0.042
hypervisor: 0.041
ppc: 0.038
vnc: 0.032
graphic: 0.029
risc-v: 0.028
kernel: 0.019
socket: 0.013
permissions: 0.010
files: 0.009
register: 0.009
assembly: 0.005

Documentation for mtdblock, option-rom, and pflash is non-existent