tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.sh

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