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. 14bootparam_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. 22checkarg () { 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. 45configfrag_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. 57configfrag_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. 82configfrag_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. 102configfrag_hotplug_cpu () { 103 if test ! -r "$1" 104 then 105 echo Unreadable config fragment "$1" 1>&2 106 exit -1 107 fi 108 grep -q '^CONFIG_HOTPLUG_CPU=y$' "$1" 109} 110 111# identify_boot_image qemu-cmd 112# 113# Returns the relative path to the kernel build image. This will be 114# arch/<arch>/boot/bzImage or vmlinux if bzImage is not a target for the 115# architecture, unless overridden with the TORTURE_BOOT_IMAGE environment 116# variable. 117identify_boot_image () { 118 if test -n "$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. 140identify_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. 171identify_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. 193identify_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. 236identify_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 243print_bug () { 244 printf '\033[031mBUG: \033[m' 245 echo $* 246} 247 248# print_warning 249# 250# Prints "WARNING: " in yellow followed by remaining arguments 251print_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". 260specify_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} 278