2 # SPDX-License-Identifier: GPL-2.0+
4 # Shell functions for the rest of the scripts.
6 # Copyright (C) IBM Corporation, 2013
8 # Authors: Paul E. McKenney <paulmck@linux.ibm.com>
10 # bootparam_hotplug_cpu bootparam-string
12 # Returns 1 if the specified boot-parameter string tells rcutorture to
13 # test CPU-hotplug operations.
14 bootparam_hotplug_cpu () {
15 echo "$1" | grep -q "torture\.onoff_"
18 # checkarg --argname argtype $# arg mustmatch cannotmatch
20 # Checks the specified argument "arg" against the mustmatch and cannotmatch
25 echo $1 needs argument $2 matching \"$5\"
28 if echo "$4" | grep -q -e "$5"
32 echo $1 $2 \"$4\" must match \"$5\"
35 if echo "$4" | grep -q -e "$6"
37 echo $1 $2 \"$4\" must not match \"$6\"
42 # configfrag_boot_params bootparam-string config-fragment-file
44 # Adds boot parameters from the .boot file, if any.
45 configfrag_boot_params () {
48 echo $1 `grep -v '^#' "$2.boot" | tr '\012' ' '`
54 # configfrag_boot_cpus bootparam-string config-fragment-file config-cpus
56 # Decreases number of CPUs based on any nr_cpus= boot parameters specified.
57 configfrag_boot_cpus () {
58 local bootargs="`configfrag_boot_params "$1" "$2"`"
60 if echo "${bootargs}" | grep -q 'nr_cpus=[0-9]'
62 nr_cpus="`echo "${bootargs}" | sed -e 's/^.*nr_cpus=\([0-9]*\).*$/\1/'`"
63 if test "$3" -gt "$nr_cpus"
74 # configfrag_boot_maxcpus bootparam-string config-fragment-file config-cpus
76 # Decreases number of CPUs based on any maxcpus= boot parameters specified.
77 # This allows tests where additional CPUs come online later during the
78 # test run. However, the torture parameters will be set based on the
79 # number of CPUs initially present, so the scripting should schedule
80 # test runs based on the maxcpus= boot parameter controlling the initial
81 # number of CPUs instead of on the ultimate number of CPUs.
82 configfrag_boot_maxcpus () {
83 local bootargs="`configfrag_boot_params "$1" "$2"`"
85 if echo "${bootargs}" | grep -q 'maxcpus=[0-9]'
87 maxcpus="`echo "${bootargs}" | sed -e 's/^.*maxcpus=\([0-9]*\).*$/\1/'`"
88 if test "$3" -gt "$maxcpus"
99 # configfrag_hotplug_cpu config-fragment-file
101 # Returns 1 if the config fragment specifies hotplug CPU.
102 configfrag_hotplug_cpu () {
105 echo Unreadable config fragment "$1" 1>&2
108 grep -q '^CONFIG_HOTPLUG_CPU=y$' "$1"
113 # Returns a cookie identifying the current time.
115 awk 'BEGIN { print systime() }' < /dev/null
118 # get_starttime_duration starttime
120 # Given the return value from get_starttime, compute a human-readable
121 # string denoting the time since get_starttime.
122 get_starttime_duration () {
123 awk -v starttime=$1 '
125 ts = systime() - starttime;
128 td = int(ts / 86400);
134 printf "%dd %d:%02d:%02d\n", d, h, m, s
136 printf "%d:%02d:%02d\n", h, m, s
138 printf "%d:%02d.0\n", m, s
144 # identify_boot_image qemu-cmd
146 # Returns the relative path to the kernel build image. This will be
147 # arch/<arch>/boot/bzImage or vmlinux if bzImage is not a target for the
148 # architecture, unless overridden with the TORTURE_BOOT_IMAGE environment
150 identify_boot_image () {
151 if test -n "$TORTURE_BOOT_IMAGE"
153 echo $TORTURE_BOOT_IMAGE
156 qemu-system-x86_64|qemu-system-i386)
157 echo arch/x86/boot/bzImage
160 echo arch/arm64/boot/Image
169 # identify_qemu builddir
171 # Returns our best guess as to which qemu command is appropriate for
172 # the kernel at hand. Override with the TORTURE_QEMU_CMD environment variable.
174 local u="`file "$1"`"
175 if test -n "$TORTURE_QEMU_CMD"
177 echo $TORTURE_QEMU_CMD
178 elif echo $u | grep -q x86-64
180 echo qemu-system-x86_64
181 elif echo $u | grep -q "Intel 80386"
183 echo qemu-system-i386
184 elif echo $u | grep -q aarch64
186 echo qemu-system-aarch64
187 elif uname -a | grep -q ppc64
189 echo qemu-system-ppc64
191 echo Cannot figure out what qemu command to use! 1>&2
192 echo file $1 output: $u
193 # Usually this will be one of /usr/bin/qemu-system-*
194 # Use TORTURE_QEMU_CMD environment variable or appropriate
195 # argument to top-level script.
200 # identify_qemu_append qemu-cmd
202 # Output arguments for the qemu "-append" string based on CPU type
203 # and the TORTURE_QEMU_INTERACTIVE environment variable.
204 identify_qemu_append () {
205 echo debug_boot_weak_hash
209 qemu-system-x86_64|qemu-system-i386)
210 echo selinux=0 initcall_debug debug
216 if test -n "$TORTURE_QEMU_INTERACTIVE"
220 echo console=$console
224 # identify_qemu_args qemu-cmd serial-file
226 # Output arguments for qemu arguments based on the TORTURE_QEMU_MAC
227 # and TORTURE_QEMU_INTERACTIVE environment variables.
228 identify_qemu_args () {
239 qemu-system-x86_64|qemu-system-i386)
240 echo -machine q35,accel=kvm
244 echo -machine virt,gic-version=host -cpu host
247 echo -enable-kvm -M pseries -nodefaults
248 echo -device spapr-vscsi
249 if test -n "$TORTURE_QEMU_INTERACTIVE" -a -n "$TORTURE_QEMU_MAC"
251 echo -device spapr-vlan,netdev=net0,mac=$TORTURE_QEMU_MAC
252 echo -netdev bridge,br=br0,id=net0
256 if test -n "$TORTURE_QEMU_INTERACTIVE"
258 echo -monitor stdio -serial pty -S
264 # identify_qemu_vcpus
266 # Returns the number of virtual CPUs available to the aggregate of the
268 identify_qemu_vcpus () {
269 getconf _NPROCESSORS_ONLN
274 # Prints "BUG: " in red followed by remaining arguments
276 printf '\033[031mBUG: \033[m'
282 # Prints "WARNING: " in yellow followed by remaining arguments
284 printf '\033[033mWARNING: \033[m'
288 # specify_qemu_cpus qemu-cmd qemu-args #cpus
290 # Appends a string containing "-smp XXX" to qemu-args, unless the incoming
291 # qemu-args already contains "-smp".
292 specify_qemu_cpus () {
295 if echo $2 | grep -q -e -smp
300 qemu-system-x86_64|qemu-system-i386|qemu-system-aarch64)
304 nt="`lscpu | grep '^NUMA node0' | sed -e 's/^[^,]*,\([0-9]*\),.*$/\1/'`"
305 echo $2 -smp cores=`expr \( $3 + $nt - 1 \) / $nt`,threads=$nt
311 # specify_qemu_net qemu-args
313 # Appends a string containing "-net none" to qemu-args, unless the incoming
314 # qemu-args already contains "-smp" or unless the TORTURE_QEMU_INTERACTIVE
315 # environment variable is set, in which case the string that is be added is
316 # instead "-net nic -net user".
317 specify_qemu_net () {
318 if echo $1 | grep -q -e -net
321 elif test -n "$TORTURE_QEMU_INTERACTIVE"
323 echo $1 -net nic -net user