tools/testing/selftests/rcutorture/bin/functions.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0+
   3 #
   4 # Shell functions for the rest of the scripts.
   5 #
   6 # Copyright (C) IBM Corporation, 2013
   7 #
   8 # Authors: Paul E. McKenney <paulmck@linux.ibm.com>
   9
  10 # bootparam_hotplug_cpu bootparam-string
  11 #
  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 "rcutorture\.onoff_"
  16 }
  17
  18 # checkarg --argname argtype $# arg mustmatch cannotmatch
  19 #
  20 # Checks the specified argument "arg" against the mustmatch and cannotmatch
  21 # patterns.
  22 checkarg () {
  23         if test $3 -le 1
  24         then
  25                 echo $1 needs argument $2 matching \"$5\"
  26                 usage
  27         fi
  28         if echo "$4" | grep -q -e "$5"
  29         then
  30                 :
  31         else
  32                 echo $1 $2 \"$4\" must match \"$5\"
  33                 usage
  34         fi
  35         if echo "$4" | grep -q -e "$6"
  36         then
  37                 echo $1 $2 \"$4\" must not match \"$6\"
  38                 usage
  39         fi
  40 }
  41
  42 # configfrag_boot_params bootparam-string config-fragment-file
  43 #
  44 # Adds boot parameters from the .boot file, if any.
  45 configfrag_boot_params () {
  46         if test -r "$2.boot"
  47         then
  48                 echo $1 `grep -v '^#' "$2.boot" | tr '\012' ' '`
  49         else
  50                 echo $1
  51         fi
  52 }
  53
  54 # configfrag_boot_cpus bootparam-string config-fragment-file config-cpus
  55 #
  56 # Decreases number of CPUs based on any nr_cpus= boot parameters specified.
  57 configfrag_boot_cpus () {
  58         local bootargs="`configfrag_boot_params "$1" "$2"`"
  59         local nr_cpus
  60         if echo "${bootargs}" | grep -q 'nr_cpus=[0-9]'
  61         then
  62                 nr_cpus="`echo "${bootargs}" | sed -e 's/^.*nr_cpus=\([0-9]*\).*$/\1/'`"
  63                 if test "$3" -gt "$nr_cpus"
  64                 then
  65                         echo $nr_cpus
  66                 else
  67                         echo $3
  68                 fi
  69         else
  70                 echo $3
  71         fi
  72 }
  73
  74 # configfrag_boot_maxcpus bootparam-string config-fragment-file config-cpus
  75 #
  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" "$2"`"
  84         local maxcpus
  85         if echo "${bootargs}" | grep -q 'maxcpus=[0-9]'
  86         then
  87                 maxcpus="`echo "${bootargs}" | sed -e 's/^.*maxcpus=\([0-9]*\).*$/\1/'`"
  88                 if test "$3" -gt "$maxcpus"
  89                 then
  90                         echo $maxcpus
  91                 else
  92                         echo $3
  93                 fi
  94         else
  95                 echo $3
  96         fi
  97 }
  98
  99 # configfrag_hotplug_cpu config-fragment-file
 100 #
 101 # Returns 1 if the config fragment specifies hotplug CPU.
 102 configfrag_hotplug_cpu () {
 103         if test ! -r "$1"
 104         then
 105                 echo Unreadable config fragment "$1" 1>&2
 106                 exit -1
 107         fi
 108         grep -q '^CONFIG_HOTPLUG_CPU=y$' "$1"
 109 }
 110
 111 # identify_boot_image qemu-cmd
 112 #
 113 # Returns the relative path to the kernel build image.  This will be
 114 # arch/<arch>/boot/bzImage or vmlinux if bzImage is not a target for the
 115 # architecture, unless overridden with the TORTURE_BOOT_IMAGE environment
 116 # variable.
 117 identify_boot_image () {
 118         if test -n "$TORTURE_BOOT_IMAGE"
 119         then
 120                 echo $TORTURE_BOOT_IMAGE
 121         else
 122                 case "$1" in
 123                 qemu-system-x86_64|qemu-system-i386)
 124                         echo arch/x86/boot/bzImage
 125                         ;;
 126                 qemu-system-aarch64)
 127                         echo arch/arm64/boot/Image
 128                         ;;
 129                 *)
 130                         echo vmlinux
 131                         ;;
 132                 esac
 133         fi
 134 }
 135
 136 # identify_qemu builddir
 137 #
 138 # Returns our best guess as to which qemu command is appropriate for
 139 # the kernel at hand.  Override with the TORTURE_QEMU_CMD environment variable.
 140 identify_qemu () {
 141         local u="`file "$1"`"
 142         if test -n "$TORTURE_QEMU_CMD"
 143         then
 144                 echo $TORTURE_QEMU_CMD
 145         elif echo $u | grep -q x86-64
 146         then
 147                 echo qemu-system-x86_64
 148         elif echo $u | grep -q "Intel 80386"
 149         then
 150                 echo qemu-system-i386
 151         elif echo $u | grep -q aarch64
 152         then
 153                 echo qemu-system-aarch64
 154         elif uname -a | grep -q ppc64
 155         then
 156                 echo qemu-system-ppc64
 157         else
 158                 echo Cannot figure out what qemu command to use! 1>&2
 159                 echo file $1 output: $u
 160                 # Usually this will be one of /usr/bin/qemu-system-*
 161                 # Use TORTURE_QEMU_CMD environment variable or appropriate
 162                 # argument to top-level script.
 163                 exit 1
 164         fi
 165 }
 166
 167 # identify_qemu_append qemu-cmd
 168 #
 169 # Output arguments for the qemu "-append" string based on CPU type
 170 # and the TORTURE_QEMU_INTERACTIVE environment variable.
 171 identify_qemu_append () {
 172         local console=ttyS0
 173         case "$1" in
 174         qemu-system-x86_64|qemu-system-i386)
 175                 echo selinux=0 initcall_debug debug
 176                 ;;
 177         qemu-system-aarch64)
 178                 console=ttyAMA0
 179                 ;;
 180         esac
 181         if test -n "$TORTURE_QEMU_INTERACTIVE"
 182         then
 183                 echo root=/dev/sda
 184         else
 185                 echo console=$console
 186         fi
 187 }
 188
 189 # identify_qemu_args qemu-cmd serial-file
 190 #
 191 # Output arguments for qemu arguments based on the TORTURE_QEMU_MAC
 192 # and TORTURE_QEMU_INTERACTIVE environment variables.
 193 identify_qemu_args () {
 194         local KVM_CPU=""
 195         case "$1" in
 196         qemu-system-x86_64)
 197                 KVM_CPU=kvm64
 198                 ;;
 199         qemu-system-i386)
 200                 KVM_CPU=kvm32
 201                 ;;
 202         esac
 203         case "$1" in
 204         qemu-system-x86_64|qemu-system-i386)
 205                 echo -machine q35,accel=kvm
 206                 echo -cpu ${KVM_CPU}
 207                 ;;
 208         qemu-system-aarch64)
 209                 echo -machine virt,gic-version=host -cpu host
 210                 ;;
 211         qemu-system-ppc64)
 212                 echo -enable-kvm -M pseries -nodefaults
 213                 echo -device spapr-vscsi
 214                 if test -n "$TORTURE_QEMU_INTERACTIVE" -a -n "$TORTURE_QEMU_MAC"
 215                 then
 216                         echo -device spapr-vlan,netdev=net0,mac=$TORTURE_QEMU_MAC
 217                         echo -netdev bridge,br=br0,id=net0
 218                 elif test -n "$TORTURE_QEMU_INTERACTIVE"
 219                 then
 220                         echo -net nic -net user
 221                 fi
 222                 ;;
 223         esac
 224         if test -n "$TORTURE_QEMU_INTERACTIVE"
 225         then
 226                 echo -monitor stdio -serial pty -S
 227         else
 228                 echo -serial file:$2
 229         fi
 230 }
 231
 232 # identify_qemu_vcpus
 233 #
 234 # Returns the number of virtual CPUs available to the aggregate of the
 235 # guest OSes.
 236 identify_qemu_vcpus () {
 237         lscpu | grep '^CPU(s):' | sed -e 's/CPU(s)://'
 238 }
 239
 240 # print_bug
 241 #
 242 # Prints "BUG: " in red followed by remaining arguments
 243 print_bug () {
 244         printf '\033[031mBUG: \033[m'
 245         echo $*
 246 }
 247
 248 # print_warning
 249 #
 250 # Prints "WARNING: " in yellow followed by remaining arguments
 251 print_warning () {
 252         printf '\033[033mWARNING: \033[m'
 253         echo $*
 254 }
 255
 256 # specify_qemu_cpus qemu-cmd qemu-args #cpus
 257 #
 258 # Appends a string containing "-smp XXX" to qemu-args, unless the incoming
 259 # qemu-args already contains "-smp".
 260 specify_qemu_cpus () {
 261         local nt;
 262
 263         if echo $2 | grep -q -e -smp
 264         then
 265                 echo $2
 266         else
 267                 case "$1" in
 268                 qemu-system-x86_64|qemu-system-i386|qemu-system-aarch64)
 269                         echo $2 -smp $3
 270                         ;;
 271                 qemu-system-ppc64)
 272                         nt="`lscpu | grep '^NUMA node0' | sed -e 's/^[^,]*,\([0-9]*\),.*$/\1/'`"
 273                         echo $2 -smp cores=`expr \( $3 + $nt - 1 \) / $nt`,threads=$nt
 274                         ;;
 275                 esac
 276         fi
 277 }