2 # SPDX-License-Identifier: GPL-2.0-only */
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.
7 # tools/testing/selftests/kvm/nx_huge_page_test.sh
8 # Copyright (C) 2022, Google LLC.
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
)
19 function sudo_echo
() {
20 echo "$1" | sudo
tee -a "$2" > /dev
/null
23 NXECUTABLE
="$(dirname $0)/nx_huge_pages_test"
25 sudo_echo
test /dev
/null ||
exit 4 # KSFT_SKIP=4
30 sudo_echo
1 /sys
/module
/kvm
/parameters
/nx_huge_pages
31 sudo_echo
1 /sys
/module
/kvm
/parameters
/nx_huge_pages_recovery_ratio
32 sudo_echo
100 /sys
/module
/kvm
/parameters
/nx_huge_pages_recovery_period_ms
33 sudo_echo
"$(( $HUGE_PAGES + 3 ))" /sys
/kernel
/mm
/hugepages
/hugepages-2048kB
/nr_hugepages
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
41 echo setcap failed
, skipping nx_huge_pages_test with CAP_SYS_BOOT enabled
44 # Test without reboot permissions
45 if [ $
(whoami
) != "root" ] ; then
46 echo Running
test with CAP_SYS_BOOT disabled
47 $NXECUTABLE -t 887563923 -p 100
49 echo Running as root
, skipping nx_huge_pages_test with CAP_SYS_BOOT disabled
54 sudo_echo
"$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