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 # Copyright (C) 2022, Google LLC.
   8
   9 set -e
  10
  11 NX_HUGE_PAGES=$(cat /sys/module/kvm/parameters/nx_huge_pages)
  12 NX_HUGE_PAGES_RECOVERY_RATIO=$(cat /sys/module/kvm/parameters/nx_huge_pages_recovery_ratio)
  13 NX_HUGE_PAGES_RECOVERY_PERIOD=$(cat /sys/module/kvm/parameters/nx_huge_pages_recovery_period_ms)
  14 HUGE_PAGES=$(cat /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages)
  15
  16 set +e
  17
  18 function sudo_echo () {
  19         echo "$1" | sudo tee -a "$2" > /dev/null
  20 }
  21
  22 NXECUTABLE="$(dirname $0)/nx_huge_pages_test"
  23
  24 sudo_echo test /dev/null || exit 4 # KSFT_SKIP=4
  25
  26 (
  27         set -e
  28
  29         sudo_echo 1 /sys/module/kvm/parameters/nx_huge_pages
  30         sudo_echo 1 /sys/module/kvm/parameters/nx_huge_pages_recovery_ratio
  31         sudo_echo 100 /sys/module/kvm/parameters/nx_huge_pages_recovery_period_ms
  32         sudo_echo "$(( $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                 $NXECUTABLE -t 887563923 -p 100
  47         else
  48                 echo Running as root, skipping nx_huge_pages_test with CAP_SYS_BOOT disabled
  49         fi
  50 )
  51 RET=$?
  52
  53 sudo_echo "$NX_HUGE_PAGES" /sys/module/kvm/parameters/nx_huge_pages
  54 sudo_echo "$NX_HUGE_PAGES_RECOVERY_RATIO" /sys/module/kvm/parameters/nx_huge_pages_recovery_ratio
  55 sudo_echo "$NX_HUGE_PAGES_RECOVERY_PERIOD" /sys/module/kvm/parameters/nx_huge_pages_recovery_period_ms
  56 sudo_echo "$HUGE_PAGES" /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
  57
  58 exit $RET