New "Architecture" info in LUCI Status page

Hi all
I have noticed in 18.06.0 RC2 that there is a new "Architecture" info row in the LUCI Status page
I have added aa new sunxi target board (Orange Pi PC2) but my image display a "?" instead of something meaningful.
I guess that there is some new file that LUCI process, but I cannot understand which is
Can anyone help me?

The LuCI source code pretty clearly indicates that it is queried with ubus. But I have not traced how ubus finds the info in the main Openwrt source...



root@router2:~# ubus call system board
        "kernel": "4.9.111",
        "hostname": "router2",
        "system": "Atheros AR7161 rev 2",
        "model": "NETGEAR WNDR3700v2",
        "board_name": "wndr3700",
        "release": {
                "distribution": "OpenWrt",
                "version": "SNAPSHOT",
                "revision": "r7581-7880a6f7fe",
                "target": "ar71xx\/generic",
                "description": "OpenWrt SNAPSHOT r7581-7880a6f7fe"


I think it is from /proc/cpuinfo
But for all winner SoC there is no such informato, that is why it endup in display ?