1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0-only */ 3# 4# Wrapper script which performs setup and cleanup for nx_huge_pages_test. 5# Makes use of root privileges to set up huge pages and KVM module parameters. 6# 7# Copyright (C) 2022, Google LLC. 8 9set -e 10 11NX_HUGE_PAGES=$(cat /sys/module/kvm/parameters/nx_huge_pages) 12NX_HUGE_PAGES_RECOVERY_RATIO=$(cat /sys/module/kvm/parameters/nx_huge_pages_recovery_ratio) 13NX_HUGE_PAGES_RECOVERY_PERIOD=$(cat /sys/module/kvm/parameters/nx_huge_pages_recovery_period_ms) 14HUGE_PAGES=$(cat /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages) 15 16set +e 17 18function sudo_echo () { 19 echo "$1" | sudo tee -a "$2" > /dev/null 20} 21 22NXECUTABLE="$(dirname $0)/nx_huge_pages_test" 23 24sudo_echo test /dev/null || exit 4 # KSFT_SKIP=4 25 26( 27 set -e 28 29 sudo_echo 1 /sys/module/kvm/parameters/nx_huge_pages 30 sudo_echo 1 /sys/module/kvm/parameters/nx_huge_pages_recovery_ratio 31 sudo_echo 100 /sys/module/kvm/parameters/nx_huge_pages_recovery_period_ms 32 sudo_echo "$(( $HUGE_PAGES + 3 ))" /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages 33 34 # Test with reboot permissions 35 if [ $(whoami) == "root" ] || sudo setcap cap_sys_boot+ep $NXECUTABLE 2> /dev/null; then 36 echo Running test with CAP_SYS_BOOT enabled 37 $NXECUTABLE -t 887563923 -p 100 -r 38 test $(whoami) == "root" || sudo setcap cap_sys_boot-ep $NXECUTABLE 39 else 40 echo setcap failed, skipping nx_huge_pages_test with CAP_SYS_BOOT enabled 41 fi 42 43 # Test without reboot permissions 44 if [ $(whoami) != "root" ] ; then 45 echo Running test with CAP_SYS_BOOT disabled 46 $NXECUTABLE -t 887563923 -p 100 47 else 48 echo Running as root, skipping nx_huge_pages_test with CAP_SYS_BOOT disabled 49 fi 50) 51RET=$? 52 53sudo_echo "$NX_HUGE_PAGES" /sys/module/kvm/parameters/nx_huge_pages 54sudo_echo "$NX_HUGE_PAGES_RECOVERY_RATIO" /sys/module/kvm/parameters/nx_huge_pages_recovery_ratio 55sudo_echo "$NX_HUGE_PAGES_RECOVERY_PERIOD" /sys/module/kvm/parameters/nx_huge_pages_recovery_period_ms 56sudo_echo "$HUGE_PAGES" /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages 57 58exit $RET 59