#!/usr/bin/env bash
# Copyright (c) 2019 Intel Corporation
#
# SPDX-License-Identifier: Apache-2.0
#
# Description: Offline SOS CPUs except BSP before launch UOS

[[ $(id -u) -eq 0 ]] || { echo >&2 "ERROR: run as root"; exit 1; }

for i in /sys/devices/system/cpu/cpu[1-9]*; do
        [[ -e "${i}/online" ]] || continue
        online=$(cat "${i}/online")
        idx=$(echo "${i}" | tr -cd "0-9")
        echo "INFO:$0: cpu${idx} online=${online}"
        if [[ "${online}" = "1" ]]; then
                echo 0 > "${i}/online"
                while [[ "${online}" = "1" ]]; do
                        sleep 1
                        echo 0 > "${i}/online"
                        online=$(cat "${i}/online")
                done
        fi
done