add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

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SSV_DFS_FILE=/sys/kernel/debug/ssv/ssv_cmd
if [ -f $SSV_DFS_FILE ]; then
    echo "$*" > $SSV_DFS_FILE
    cat $SSV_DFS_FILE
fi