ref: d9862e4ad30a74da88a2cd2ec5eb2780a627da49
dir: /sys/src/9/mtx/mtxcpu/
dev root cons arch pnp pci env pipe proc mnt srv dup ssl cap kprof uart rtc ether netif ip arp chandial ip ipv6 ipaux iproute netif netlog nullmedium pktmedium ptclbsum inferno link ether2114x pci ethermedium netdevmedium misc uarti8250 ip tcp udp ipifc icmp icmp6 port int cpuserver = 1; boot cpu tcp bootdir bootmtxcpu.out boot ipconfig.hack ipconfig factotum.hack factotum