Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

171 files changed, 6962 insertions, 0 deletions

diff --git a/tools/testing/selftests/rcutorture/.gitignore b/tools/testing/selftests/rcutorture/.gitignore
new file mode 100644
index 000000000..f6cbce774
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/.gitignore
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-only
+initrd
+b[0-9]*
+res
+*.swp
diff --git a/tools/testing/selftests/rcutorture/Makefile b/tools/testing/selftests/rcutorture/Makefile
new file mode 100644
index 000000000..5202dc666
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0+
+all:
+	( cd ../../../..; tools/testing/selftests/rcutorture/bin/kvm.sh --duration 10 --configs TREE01 )
diff --git a/tools/testing/selftests/rcutorture/bin/config2csv.sh b/tools/testing/selftests/rcutorture/bin/config2csv.sh
new file mode 100755
index 000000000..d5a16631b
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/config2csv.sh
@@ -0,0 +1,67 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Create a spreadsheet from torture-test Kconfig options and kernel boot
+# parameters.  Run this in the directory containing the scenario files.
+#
+# Usage: config2csv path.csv [ "scenario1 scenario2 ..." ]
+#
+# By default, this script will take the list of scenarios from the CFLIST
+# file in that directory, otherwise it will consider only the scenarios
+# specified on the command line.  It will examine each scenario's file
+# and also its .boot file, if present, and create a column in the .csv
+# output file.  Note that "CFLIST" is a synonym for all the scenarios in the
+# CFLIST file, which allows easy comparison of those scenarios with selected
+# scenarios such as BUSTED that are normally omitted from CFLIST files.
+
+csvout=${1}
+if test -z "$csvout"
+then
+	echo "Need .csv output file as first argument."
+	exit 1
+fi
+shift
+defaultconfigs="`tr '\012' ' ' < CFLIST`"
+if test "$#" -eq 0
+then
+	scenariosarg=$defaultconfigs
+else
+	scenariosarg=$*
+fi
+scenarios="`echo $scenariosarg | sed -e "s/\<CFLIST\>/$defaultconfigs/g"`"
+
+T=/tmp/config2latex.sh.$$
+trap 'rm -rf $T' 0
+mkdir $T
+
+cat << '---EOF---' >> $T/p.awk
+END	{
+---EOF---
+for i in $scenarios
+do
+	echo '	s["'$i'"] = 1;' >> $T/p.awk
+	grep -v '^#' < $i | grep -v '^ *$' > $T/p
+	if test -r $i.boot
+	then
+		tr -s ' ' '\012' < $i.boot | grep -v '^#' >> $T/p
+	fi
+	sed -e 's/^[^=]*$/&=?/' < $T/p |
+	sed -e 's/^\([^=]*\)=\(.*\)$/\tp["\1:'"$i"'"] = "\2";\n\tc["\1"] = 1;/' >> $T/p.awk
+done
+cat << '---EOF---' >> $T/p.awk
+	ns = asorti(s, ss);
+	nc = asorti(c, cs);
+	for (j = 1; j <= ns; j++)
+		printf ",\"%s\"", ss[j];
+	printf "\n";
+	for (i = 1; i <= nc; i++) {
+		printf "\"%s\"", cs[i];
+		for (j = 1; j <= ns; j++) {
+			printf ",\"%s\"", p[cs[i] ":" ss[j]];
+		}
+		printf "\n";
+	}
+}
+---EOF---
+awk -f $T/p.awk < /dev/null > $T/p.csv
+cp $T/p.csv $csvout
diff --git a/tools/testing/selftests/rcutorture/bin/configNR_CPUS.sh b/tools/testing/selftests/rcutorture/bin/configNR_CPUS.sh
new file mode 100755
index 000000000..2deea2169
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/configNR_CPUS.sh
@@ -0,0 +1,32 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Extract the number of CPUs expected from the specified Kconfig-file
+# fragment by checking CONFIG_SMP and CONFIG_NR_CPUS.  If the specified
+# file gives no clue, base the number on the number of idle CPUs on
+# the system.
+#
+# Usage: configNR_CPUS.sh config-frag
+#
+# Copyright (C) IBM Corporation, 2013
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+cf=$1
+if test ! -r $cf
+then
+	echo Unreadable config fragment $cf 1>&2
+	exit -1
+fi
+if grep -q '^CONFIG_SMP=n$' $cf
+then
+	echo 1
+	exit 0
+fi
+if grep -q '^CONFIG_NR_CPUS=' $cf
+then
+	grep '^CONFIG_NR_CPUS=' $cf | 
+		sed -e 's/^CONFIG_NR_CPUS=\([0-9]*\).*$/\1/'
+	exit 0
+fi
+cpus2use.sh
diff --git a/tools/testing/selftests/rcutorture/bin/config_override.sh b/tools/testing/selftests/rcutorture/bin/config_override.sh
new file mode 100755
index 000000000..90016c359
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/config_override.sh
@@ -0,0 +1,48 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# config_override.sh base override
+#
+# Combines base and override, removing any Kconfig options from base
+# that conflict with any in override, concatenating what remains and
+# sending the result to standard output.
+#
+# Copyright (C) IBM Corporation, 2017
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+base=$1
+if test -r $base
+then
+	:
+else
+	echo Base file $base unreadable!!!
+	exit 1
+fi
+
+override=$2
+if test -r $override
+then
+	:
+else
+	echo Override file $override unreadable!!!
+	exit 1
+fi
+
+T=${TMPDIR-/tmp}/config_override.sh.$$
+trap 'rm -rf $T' 0
+mkdir $T
+
+sed < $override -e 's/^/grep -v "/' -e 's/=.*$/="/' |
+	awk '
+	{
+		if (last)
+			print last " |";
+		last = $0;
+	}
+	END {
+		if (last)
+			print last;
+	}' > $T/script
+sh $T/script < $base
+cat $override
diff --git a/tools/testing/selftests/rcutorture/bin/configcheck.sh b/tools/testing/selftests/rcutorture/bin/configcheck.sh
new file mode 100755
index 000000000..31584cee8
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/configcheck.sh
@@ -0,0 +1,43 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Usage: configcheck.sh .config .config-template
+#
+# Copyright (C) IBM Corporation, 2011
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+T=${TMPDIR-/tmp}/abat-chk-config.sh.$$
+trap 'rm -rf $T' 0
+mkdir $T
+
+cat $1 > $T/.config
+
+cat $2 | sed -e 's/\(.*\)=n/# \1 is not set/' -e 's/^#CHECK#//' |
+grep -v '^CONFIG_INITRAMFS_SOURCE' |
+awk	'
+{
+		print "if grep -q \"" $0 "\" < '"$T/.config"'";
+		print "then";
+		print "\t:";
+		print "else";
+		if ($1 == "#") {
+			print "\tif grep -q \"" $2 "\" < '"$T/.config"'";
+			print "\tthen";
+			print "\t\tif test \"$firsttime\" = \"\""
+			print "\t\tthen"
+			print "\t\t\tfirsttime=1"
+			print "\t\tfi"
+			print "\t\techo \":" $2 ": improperly set\"";
+			print "\telse";
+			print "\t\t:";
+			print "\tfi";
+		} else {
+			print "\tif test \"$firsttime\" = \"\""
+			print "\tthen"
+			print "\t\tfirsttime=1"
+			print "\tfi"
+			print "\techo \":" $0 ": improperly set\"";
+		}
+		print "fi";
+	}' | sh
diff --git a/tools/testing/selftests/rcutorture/bin/configinit.sh b/tools/testing/selftests/rcutorture/bin/configinit.sh
new file mode 100755
index 000000000..d6e5ce084
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/configinit.sh
@@ -0,0 +1,44 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Usage: configinit.sh config-spec-file results-dir
+#
+# Create a .config file from the spec file.  Run from the kernel source tree.
+# Exits with 0 if all went well, with 1 if all went well but the config
+# did not match, and some other number for other failures.
+#
+# The first argument is the .config specification file, which contains
+# desired settings, for example, "CONFIG_NO_HZ=y".  For best results,
+# this should be a full pathname.
+#
+# Copyright (C) IBM Corporation, 2013
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+T=${TMPDIR-/tmp}/configinit.sh.$$
+trap 'rm -rf $T' 0
+mkdir $T
+
+# Capture config spec file.
+
+c=$1
+resdir=$2
+
+sed -e 's/^\(CONFIG[0-9A-Z_]*\)=.*$/grep -v "^# \1" |/' < $c > $T/u.sh
+sed -e 's/^\(CONFIG[0-9A-Z_]*=\).*$/grep -v \1 |/' < $c >> $T/u.sh
+grep '^grep' < $T/u.sh > $T/upd.sh
+echo "cat - $c" >> $T/upd.sh
+if test -z "$TORTURE_TRUST_MAKE"
+then
+	make clean > $resdir/Make.clean 2>&1
+fi
+make $TORTURE_KMAKE_ARG $TORTURE_DEFCONFIG > $resdir/Make.defconfig.out 2>&1
+mv .config .config.sav
+sh $T/upd.sh < .config.sav > .config
+cp .config .config.new
+yes '' | make $TORTURE_KMAKE_ARG oldconfig > $resdir/Make.oldconfig.out 2> $resdir/Make.oldconfig.err
+
+# verify new config matches specification.
+configcheck.sh .config $c
+
+exit 0
diff --git a/tools/testing/selftests/rcutorture/bin/console-badness.sh b/tools/testing/selftests/rcutorture/bin/console-badness.sh
new file mode 100755
index 000000000..69f8a5958
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/console-badness.sh
@@ -0,0 +1,18 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Scan standard input for error messages, dumping any found to standard
+# output.
+#
+# Usage: console-badness.sh
+#
+# Copyright (C) 2020 Facebook, Inc.
+#
+# Authors: Paul E. McKenney <paulmck@kernel.org>
+
+egrep 'Badness|WARNING:|Warn|BUG|===========|BUG: KCSAN:|Call Trace:|Oops:|detected stalls on CPUs/tasks:|self-detected stall on CPU|Stall ended before state dump start|\?\?\? Writer stall state|rcu_.*kthread starved for|!!!' |
+grep -v 'ODEBUG: ' |
+grep -v 'This means that this is a DEBUG kernel and it is' |
+grep -v 'Warning: unable to open an initial console' |
+grep -v 'Warning: Failed to add ttynull console. No stdin, stdout, and stderr.*the init process!' |
+grep -v 'NOHZ tick-stop error: Non-RCU local softirq work is pending, handler'
diff --git a/tools/testing/selftests/rcutorture/bin/cpus2use.sh b/tools/testing/selftests/rcutorture/bin/cpus2use.sh
new file mode 100755
index 000000000..6bb993001
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/cpus2use.sh
@@ -0,0 +1,39 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Get an estimate of how CPU-hoggy to be.
+#
+# Usage: cpus2use.sh
+#
+# Copyright (C) IBM Corporation, 2013
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+if test -n "$TORTURE_ALLOTED_CPUS"
+then
+	echo $TORTURE_ALLOTED_CPUS
+	exit 0
+fi
+ncpus=`grep '^processor' /proc/cpuinfo | wc -l`
+if mpstat -V > /dev/null 2>&1
+then
+	idlecpus=`mpstat | tail -1 | \
+		awk -v ncpus=$ncpus '{ print ncpus * ($7 + $NF) / 100 }'`
+else
+	# No mpstat command, so use all available CPUs.
+	idlecpus=$ncpus
+fi
+awk -v ncpus=$ncpus -v idlecpus=$idlecpus < /dev/null '
+BEGIN {
+	cpus2use = idlecpus;
+	if (cpus2use < 1)
+		cpus2use = 1;
+	if (cpus2use < ncpus / 10)
+		cpus2use = ncpus / 10;
+	if (cpus2use == int(cpus2use))
+		cpus2use = int(cpus2use)
+	else
+		cpus2use = int(cpus2use) + 1
+	print cpus2use;
+}'
+
diff --git a/tools/testing/selftests/rcutorture/bin/functions.sh b/tools/testing/selftests/rcutorture/bin/functions.sh
new file mode 100644
index 000000000..66d0414d8
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/functions.sh
@@ -0,0 +1,327 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Shell functions for the rest of the scripts.
+#
+# Copyright (C) IBM Corporation, 2013
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+# bootparam_hotplug_cpu bootparam-string
+#
+# Returns 1 if the specified boot-parameter string tells rcutorture to
+# test CPU-hotplug operations.
+bootparam_hotplug_cpu () {
+	echo "$1" | grep -q "torture\.onoff_"
+}
+
+# checkarg --argname argtype $# arg mustmatch cannotmatch
+#
+# Checks the specified argument "arg" against the mustmatch and cannotmatch
+# patterns.
+checkarg () {
+	if test $3 -le 1
+	then
+		echo $1 needs argument $2 matching \"$5\"
+		usage
+	fi
+	if echo "$4" | grep -q -e "$5"
+	then
+		:
+	else
+		echo $1 $2 \"$4\" must match \"$5\"
+		usage
+	fi
+	if echo "$4" | grep -q -e "$6"
+	then
+		echo $1 $2 \"$4\" must not match \"$6\"
+		usage
+	fi
+}
+
+# configfrag_boot_params bootparam-string config-fragment-file
+#
+# Adds boot parameters from the .boot file, if any.
+configfrag_boot_params () {
+	if test -r "$2.boot"
+	then
+		echo $1 `grep -v '^#' "$2.boot" | tr '\012' ' '`
+	else
+		echo $1
+	fi
+}
+
+# configfrag_boot_cpus bootparam-string config-fragment-file config-cpus
+#
+# Decreases number of CPUs based on any nr_cpus= boot parameters specified.
+configfrag_boot_cpus () {
+	local bootargs="`configfrag_boot_params "$1" "$2"`"
+	local nr_cpus
+	if echo "${bootargs}" | grep -q 'nr_cpus=[0-9]'
+	then
+		nr_cpus="`echo "${bootargs}" | sed -e 's/^.*nr_cpus=\([0-9]*\).*$/\1/'`"
+		if test "$3" -gt "$nr_cpus"
+		then
+			echo $nr_cpus
+		else
+			echo $3
+		fi
+	else
+		echo $3
+	fi
+}
+
+# configfrag_boot_maxcpus bootparam-string config-fragment-file config-cpus
+#
+# Decreases number of CPUs based on any maxcpus= boot parameters specified.
+# This allows tests where additional CPUs come online later during the
+# test run.  However, the torture parameters will be set based on the
+# number of CPUs initially present, so the scripting should schedule
+# test runs based on the maxcpus= boot parameter controlling the initial
+# number of CPUs instead of on the ultimate number of CPUs.
+configfrag_boot_maxcpus () {
+	local bootargs="`configfrag_boot_params "$1" "$2"`"
+	local maxcpus
+	if echo "${bootargs}" | grep -q 'maxcpus=[0-9]'
+	then
+		maxcpus="`echo "${bootargs}" | sed -e 's/^.*maxcpus=\([0-9]*\).*$/\1/'`"
+		if test "$3" -gt "$maxcpus"
+		then
+			echo $maxcpus
+		else
+			echo $3
+		fi
+	else
+		echo $3
+	fi
+}
+
+# configfrag_hotplug_cpu config-fragment-file
+#
+# Returns 1 if the config fragment specifies hotplug CPU.
+configfrag_hotplug_cpu () {
+	if test ! -r "$1"
+	then
+		echo Unreadable config fragment "$1" 1>&2
+		exit -1
+	fi
+	grep -q '^CONFIG_HOTPLUG_CPU=y$' "$1"
+}
+
+# get_starttime
+#
+# Returns a cookie identifying the current time.
+get_starttime () {
+	awk 'BEGIN { print systime() }' < /dev/null
+}
+
+# get_starttime_duration starttime
+#
+# Given the return value from get_starttime, compute a human-readable
+# string denoting the time since get_starttime.
+get_starttime_duration () {
+	awk -v starttime=$1 '
+	BEGIN {
+		ts = systime() - starttime; 
+		tm = int(ts / 60);
+		th = int(ts / 3600);
+		td = int(ts / 86400);
+		d = td;
+		h = th - td * 24;
+		m = tm - th * 60;
+		s = ts - tm * 60;
+		if (d >= 1)
+			printf "%dd %d:%02d:%02d\n", d, h, m, s
+		else if (h >= 1)
+			printf "%d:%02d:%02d\n", h, m, s
+		else if (m >= 1)
+			printf "%d:%02d.0\n", m, s
+		else
+			print s " seconds"
+	}' < /dev/null
+}
+
+# identify_boot_image qemu-cmd
+#
+# Returns the relative path to the kernel build image.  This will be
+# arch/<arch>/boot/bzImage or vmlinux if bzImage is not a target for the
+# architecture, unless overridden with the TORTURE_BOOT_IMAGE environment
+# variable.
+identify_boot_image () {
+	if test -n "$TORTURE_BOOT_IMAGE"
+	then
+		echo $TORTURE_BOOT_IMAGE
+	else
+		case "$1" in
+		qemu-system-x86_64|qemu-system-i386)
+			echo arch/x86/boot/bzImage
+			;;
+		qemu-system-aarch64)
+			echo arch/arm64/boot/Image
+			;;
+		*)
+			echo vmlinux
+			;;
+		esac
+	fi
+}
+
+# identify_qemu builddir
+#
+# Returns our best guess as to which qemu command is appropriate for
+# the kernel at hand.  Override with the TORTURE_QEMU_CMD environment variable.
+identify_qemu () {
+	local u="`file "$1"`"
+	if test -n "$TORTURE_QEMU_CMD"
+	then
+		echo $TORTURE_QEMU_CMD
+	elif echo $u | grep -q x86-64
+	then
+		echo qemu-system-x86_64
+	elif echo $u | grep -q "Intel 80386"
+	then
+		echo qemu-system-i386
+	elif echo $u | grep -q aarch64
+	then
+		echo qemu-system-aarch64
+	elif uname -a | grep -q ppc64
+	then
+		echo qemu-system-ppc64
+	else
+		echo Cannot figure out what qemu command to use! 1>&2
+		echo file $1 output: $u
+		# Usually this will be one of /usr/bin/qemu-system-*
+		# Use TORTURE_QEMU_CMD environment variable or appropriate
+		# argument to top-level script.
+		exit 1
+	fi
+}
+
+# identify_qemu_append qemu-cmd
+#
+# Output arguments for the qemu "-append" string based on CPU type
+# and the TORTURE_QEMU_INTERACTIVE environment variable.
+identify_qemu_append () {
+	echo debug_boot_weak_hash
+	echo panic=-1
+	local console=ttyS0
+	case "$1" in
+	qemu-system-x86_64|qemu-system-i386)
+		echo selinux=0 initcall_debug debug
+		;;
+	qemu-system-aarch64)
+		console=ttyAMA0
+		;;
+	esac
+	if test -n "$TORTURE_QEMU_INTERACTIVE"
+	then
+		echo root=/dev/sda
+	else
+		echo console=$console
+	fi
+}
+
+# identify_qemu_args qemu-cmd serial-file
+#
+# Output arguments for qemu arguments based on the TORTURE_QEMU_MAC
+# and TORTURE_QEMU_INTERACTIVE environment variables.
+identify_qemu_args () {
+	local KVM_CPU=""
+	case "$1" in
+	qemu-system-x86_64)
+		KVM_CPU=kvm64
+		;;
+	qemu-system-i386)
+		KVM_CPU=kvm32
+		;;
+	esac
+	case "$1" in
+	qemu-system-x86_64|qemu-system-i386)
+		echo -machine q35,accel=kvm
+		echo -cpu ${KVM_CPU}
+		;;
+	qemu-system-aarch64)
+		echo -machine virt,gic-version=host -cpu host
+		;;
+	qemu-system-ppc64)
+		echo -enable-kvm -M pseries -nodefaults
+		echo -device spapr-vscsi
+		if test -n "$TORTURE_QEMU_INTERACTIVE" -a -n "$TORTURE_QEMU_MAC"
+		then
+			echo -device spapr-vlan,netdev=net0,mac=$TORTURE_QEMU_MAC
+			echo -netdev bridge,br=br0,id=net0
+		fi
+		;;
+	esac
+	if test -n "$TORTURE_QEMU_INTERACTIVE"
+	then
+		echo -monitor stdio -serial pty -S
+	else
+		echo -serial file:$2
+	fi
+}
+
+# identify_qemu_vcpus
+#
+# Returns the number of virtual CPUs available to the aggregate of the
+# guest OSes.
+identify_qemu_vcpus () {
+	getconf _NPROCESSORS_ONLN
+}
+
+# print_bug
+#
+# Prints "BUG: " in red followed by remaining arguments
+print_bug () {
+	printf '\033[031mBUG: \033[m'
+	echo $*
+}
+
+# print_warning
+#
+# Prints "WARNING: " in yellow followed by remaining arguments
+print_warning () {
+	printf '\033[033mWARNING: \033[m'
+	echo $*
+}
+
+# specify_qemu_cpus qemu-cmd qemu-args #cpus
+#
+# Appends a string containing "-smp XXX" to qemu-args, unless the incoming
+# qemu-args already contains "-smp".
+specify_qemu_cpus () {
+	local nt;
+
+	if echo $2 | grep -q -e -smp
+	then
+		echo $2
+	else
+		case "$1" in
+		qemu-system-x86_64|qemu-system-i386|qemu-system-aarch64)
+			echo $2 -smp $3
+			;;
+		qemu-system-ppc64)
+			nt="`lscpu | sed -n 's/^Thread(s) per core:\s*//p'`"
+			echo $2 -smp cores=`expr \( $3 + $nt - 1 \) / $nt`,threads=$nt
+			;;
+		esac
+	fi
+}
+
+# specify_qemu_net qemu-args
+#
+# Appends a string containing "-net none" to qemu-args, unless the incoming
+# qemu-args already contains "-smp" or unless the TORTURE_QEMU_INTERACTIVE
+# environment variable is set, in which case the string that is be added is
+# instead "-net nic -net user".
+specify_qemu_net () {
+	if echo $1 | grep -q -e -net
+	then
+		echo $1
+	elif test -n "$TORTURE_QEMU_INTERACTIVE"
+	then
+		echo $1 -net nic -net user
+	else
+		echo $1 -net none
+	fi
+}
diff --git a/tools/testing/selftests/rcutorture/bin/jitter.sh b/tools/testing/selftests/rcutorture/bin/jitter.sh
new file mode 100755
index 000000000..fd1ffaa5a
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/jitter.sh
@@ -0,0 +1,100 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Alternate sleeping and spinning on randomly selected CPUs.  The purpose
+# of this script is to inflict random OS jitter on a concurrently running
+# test.
+#
+# Usage: jitter.sh me jittering-path duration [ sleepmax [ spinmax ] ]
+#
+# me: Random-number-generator seed salt.
+# duration: Time to run in seconds.
+# jittering-path: Path to file whose removal will stop this script.
+# sleepmax: Maximum microseconds to sleep, defaults to one second.
+# spinmax: Maximum microseconds to spin, defaults to one millisecond.
+#
+# Copyright (C) IBM Corporation, 2016
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+me=$(($1 * 1000))
+jittering=$2
+duration=$3
+sleepmax=${4-1000000}
+spinmax=${5-1000}
+
+n=1
+
+starttime=`gawk 'BEGIN { print systime(); }' < /dev/null`
+
+nohotplugcpus=
+for i in /sys/devices/system/cpu/cpu[0-9]*
+do
+	if test -f $i/online
+	then
+		:
+	else
+		curcpu=`echo $i | sed -e 's/^[^0-9]*//'`
+		nohotplugcpus="$nohotplugcpus $curcpu"
+	fi
+done
+
+while :
+do
+	# Check for done.
+	t=`gawk -v s=$starttime 'BEGIN { print systime() - s; }' < /dev/null`
+	if test "$t" -gt "$duration"
+	then
+		exit 0;
+	fi
+
+	# Check for stop request.
+	if ! test -f "$jittering"
+	then
+		exit 1;
+	fi
+
+	# Set affinity to randomly selected online CPU
+	if cpus=`grep 1 /sys/devices/system/cpu/*/online 2>&1 |
+		 sed -e 's,/[^/]*$,,' -e 's/^[^0-9]*//'`
+	then
+		:
+	else
+		cpus=
+	fi
+	# Do not leave out non-hot-pluggable CPUs
+	cpus="$cpus $nohotplugcpus"
+
+	cpumask=`awk -v cpus="$cpus" -v me=$me -v n=$n 'BEGIN {
+		srand(n + me + systime());
+		ncpus = split(cpus, ca);
+		print ca[int(rand() * ncpus + 1)];
+	}' < /dev/null`
+	n=$(($n+1))
+	if ! taskset -c -p $cpumask $$ > /dev/null 2>&1
+	then
+		echo taskset failure: '"taskset -c -p ' $cpumask $$ '"'
+		exit 1
+	fi
+
+	# Sleep a random duration
+	sleeptime=`awk -v me=$me -v n=$n -v sleepmax=$sleepmax 'BEGIN {
+		srand(n + me + systime());
+		printf("%06d", int(rand() * sleepmax));
+	}' < /dev/null`
+	n=$(($n+1))
+	sleep .$sleeptime
+
+	# Spin a random duration
+	limit=`awk -v me=$me -v n=$n -v spinmax=$spinmax 'BEGIN {
+		srand(n + me + systime());
+		printf("%06d", int(rand() * spinmax));
+	}' < /dev/null`
+	n=$(($n+1))
+	for i in {1..$limit}
+	do
+		echo > /dev/null
+	done
+done
+
+exit 1
diff --git a/tools/testing/selftests/rcutorture/bin/jitterstart.sh b/tools/testing/selftests/rcutorture/bin/jitterstart.sh
new file mode 100644
index 000000000..3d710ad29
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/jitterstart.sh
@@ -0,0 +1,37 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Start up the specified number of jitter.sh scripts in the background.
+#
+# Usage: . jitterstart.sh n jittering-dir duration [ sleepmax [ spinmax ] ]
+#
+# n: Number of jitter.sh scripts to start up.
+# jittering-dir: Directory in which to put "jittering" file.
+# duration: Time to run in seconds.
+# sleepmax: Maximum microseconds to sleep, defaults to one second.
+# spinmax: Maximum microseconds to spin, defaults to one millisecond.
+#
+# Copyright (C) 2021 Facebook, Inc.
+#
+# Authors: Paul E. McKenney <paulmck@kernel.org>
+
+jitter_n=$1
+if test -z "$jitter_n"
+then
+	echo jitterstart.sh: Missing count of jitter.sh scripts to start.
+	exit 33
+fi
+jittering_dir=$2
+if test -z "$jittering_dir"
+then
+	echo jitterstart.sh: Missing directory in which to place jittering file.
+	exit 34
+fi
+shift
+shift
+
+touch ${jittering_dir}/jittering
+for ((jitter_i = 1; jitter_i <= $jitter_n; jitter_i++))
+do
+	jitter.sh $jitter_i "${jittering_dir}/jittering" "$@" &
+done
diff --git a/tools/testing/selftests/rcutorture/bin/jitterstop.sh b/tools/testing/selftests/rcutorture/bin/jitterstop.sh
new file mode 100644
index 000000000..576a4cf4b
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/jitterstop.sh
@@ -0,0 +1,23 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Remove the "jittering" file, signaling the jitter.sh scripts to stop,
+# then wait for them to terminate.
+#
+# Usage: . jitterstop.sh jittering-dir
+#
+# jittering-dir: Directory containing "jittering" file.
+#
+# Copyright (C) 2021 Facebook, Inc.
+#
+# Authors: Paul E. McKenney <paulmck@kernel.org>
+
+jittering_dir=$1
+if test -z "$jittering_dir"
+then
+	echo jitterstop.sh: Missing directory in which to place jittering file.
+	exit 34
+fi
+
+rm -f ${jittering_dir}/jittering
+wait
diff --git a/tools/testing/selftests/rcutorture/bin/kcsan-collapse.sh b/tools/testing/selftests/rcutorture/bin/kcsan-collapse.sh
new file mode 100755
index 000000000..1af5d6b86
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kcsan-collapse.sh
@@ -0,0 +1,22 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# If this was a KCSAN run, collapse the reports in the various console.log
+# files onto pairs of functions.
+#
+# Usage: kcsan-collapse.sh resultsdir
+#
+# Copyright (C) 2020 Facebook, Inc.
+#
+# Authors: Paul E. McKenney <paulmck@kernel.org>
+
+if test -z "$TORTURE_KCONFIG_KCSAN_ARG"
+then
+	exit 0
+fi
+find $1 -name console.log -exec cat {} \; |
+	grep "BUG: KCSAN: " |
+	sed -e 's/^\[[^]]*] //' |
+	sort |
+	uniq -c |
+	sort -k1nr > $1/kcsan.sum
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-again.sh b/tools/testing/selftests/rcutorture/bin/kvm-again.sh
new file mode 100755
index 000000000..0941f1dda
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-again.sh
@@ -0,0 +1,184 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Rerun a series of tests under KVM.
+#
+# Usage: kvm-again.sh /path/to/old/run [ options ]
+#
+# Copyright (C) 2021 Facebook, Inc.
+#
+# Authors: Paul E. McKenney <paulmck@kernel.org>
+
+scriptname=$0
+args="$*"
+
+T=${TMPDIR-/tmp}/kvm-again.sh.$$
+trap 'rm -rf $T' 0
+mkdir $T
+
+if ! test -d tools/testing/selftests/rcutorture/bin
+then
+	echo $scriptname must be run from top-level directory of kernel source tree.
+	exit 1
+fi
+
+oldrun=$1
+shift
+if ! test -d "$oldrun"
+then
+	echo "Usage: $scriptname /path/to/old/run [ options ]"
+	exit 1
+fi
+if ! cp "$oldrun/scenarios" $T/scenarios.oldrun
+then
+	# Later on, can reconstitute this from console.log files.
+	echo Prior run batches file does not exist: $oldrun/batches
+	exit 1
+fi
+
+if test -f "$oldrun/torture_suite"
+then
+	torture_suite="`cat $oldrun/torture_suite`"
+elif test -f "$oldrun/TORTURE_SUITE"
+then
+	torture_suite="`cat $oldrun/TORTURE_SUITE`"
+else
+	echo "Prior run torture_suite file does not exist: $oldrun/{torture_suite,TORTURE_SUITE}"
+	exit 1
+fi
+
+RCUTORTURE="`pwd`/tools/testing/selftests/rcutorture"; export RCUTORTURE
+PATH=${RCUTORTURE}/bin:$PATH; export PATH
+. functions.sh
+
+dryrun=
+dur=
+default_link="cp -R"
+rundir="`pwd`/tools/testing/selftests/rcutorture/res/`date +%Y.%m.%d-%H.%M.%S-again`"
+
+startdate="`date`"
+starttime="`get_starttime`"
+
+usage () {
+	echo "Usage: $scriptname $oldrun [ arguments ]:"
+	echo "       --dryrun"
+	echo "       --duration minutes | <seconds>s | <hours>h | <days>d"
+	echo "       --link hard|soft|copy"
+	echo "       --remote"
+	echo "       --rundir /new/res/path"
+	exit 1
+}
+
+while test $# -gt 0
+do
+	case "$1" in
+	--dryrun)
+		dryrun=1
+		;;
+	--duration)
+		checkarg --duration "(minutes)" $# "$2" '^[0-9][0-9]*\(s\|m\|h\|d\|\)$' '^error'
+		mult=60
+		if echo "$2" | grep -q 's$'
+		then
+			mult=1
+		elif echo "$2" | grep -q 'h$'
+		then
+			mult=3600
+		elif echo "$2" | grep -q 'd$'
+		then
+			mult=86400
+		fi
+		ts=`echo $2 | sed -e 's/[smhd]$//'`
+		dur=$(($ts*mult))
+		shift
+		;;
+	--link)
+		checkarg --link "hard|soft|copy" "$#" "$2" 'hard\|soft\|copy' '^--'
+		case "$2" in
+		copy)
+			arg_link="cp -R"
+			;;
+		hard)
+			arg_link="cp -Rl"
+			;;
+		soft)
+			arg_link="cp -Rs"
+			;;
+		esac
+		shift
+		;;
+	--remote)
+		arg_remote=1
+		default_link="cp -as"
+		;;
+	--rundir)
+		checkarg --rundir "(absolute pathname)" "$#" "$2" '^/' '^error'
+		rundir=$2
+		if test -e "$rundir"
+		then
+			echo "--rundir $2: Already exists."
+			usage
+		fi
+		shift
+		;;
+	*)
+		echo Unknown argument $1
+		usage
+		;;
+	esac
+	shift
+done
+if test -z "$arg_link"
+then
+	arg_link="$default_link"
+fi
+
+echo ---- Re-run results directory: $rundir
+
+# Copy old run directory tree over and adjust.
+mkdir -p "`dirname "$rundir"`"
+if ! $arg_link "$oldrun" "$rundir"
+then
+	echo "Cannot copy from $oldrun to $rundir."
+	usage
+fi
+rm -f "$rundir"/*/{console.log,console.log.diags,qemu_pid,qemu-pid,qemu-retval,Warnings,kvm-test-1-run.sh.out,kvm-test-1-run-qemu.sh.out,vmlinux} "$rundir"/log
+touch "$rundir/log"
+echo $scriptname $args | tee -a "$rundir/log"
+echo $oldrun > "$rundir/re-run"
+if ! test -d "$rundir/../../bin"
+then
+	$arg_link "$oldrun/../../bin" "$rundir/../.."
+fi
+for i in $rundir/*/qemu-cmd
+do
+	cp "$i" $T
+	qemu_cmd_dir="`dirname "$i"`"
+	kernel_dir="`echo $qemu_cmd_dir | sed -e 's/\.[0-9]\+$//'`"
+	jitter_dir="`dirname "$kernel_dir"`"
+	kvm-transform.sh "$kernel_dir/bzImage" "$qemu_cmd_dir/console.log" "$jitter_dir" $dur < $T/qemu-cmd > $i
+	if test -n "$arg_remote"
+	then
+		echo "# TORTURE_KCONFIG_GDB_ARG=''" >> $i
+	fi
+done
+
+# Extract settings from the last qemu-cmd file transformed above.
+grep '^#' $i | sed -e 's/^# //' > $T/qemu-cmd-settings
+. $T/qemu-cmd-settings
+
+grep -v '^#' $T/scenarios.oldrun | awk '
+{
+	curbatch = "";
+	for (i = 2; i <= NF; i++)
+		curbatch = curbatch " " $i;
+	print "kvm-test-1-run-batch.sh" curbatch;
+}' > $T/runbatches.sh
+
+if test -n "$dryrun"
+then
+	echo ---- Dryrun complete, directory: $rundir | tee -a "$rundir/log"
+else
+	( cd "$rundir"; sh $T/runbatches.sh ) | tee -a "$rundir/log"
+	kvm-end-run-stats.sh "$rundir" "$starttime"
+fi
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-assign-cpus.sh b/tools/testing/selftests/rcutorture/bin/kvm-assign-cpus.sh
new file mode 100755
index 000000000..f99b2c146
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-assign-cpus.sh
@@ -0,0 +1,106 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Produce awk statements roughly depicting the system's CPU and cache
+# layout.  If the required information is not available, produce
+# error messages as awk comments.  Successful exit regardless.
+#
+# Usage: kvm-assign-cpus.sh /path/to/sysfs
+
+T=/tmp/kvm-assign-cpus.sh.$$
+trap 'rm -rf $T' 0 2
+mkdir $T
+
+sysfsdir=${1-/sys/devices/system/node}
+if ! cd "$sysfsdir" > $T/msg 2>&1
+then
+	sed -e 's/^/# /' < $T/msg
+	exit 0
+fi
+nodelist="`ls -d node*`"
+for i in node*
+do
+	if ! test -d $i/
+	then
+		echo "# Not a directory: $sysfsdir/node*"
+		exit 0
+	fi
+	for j in $i/cpu*/cache/index*
+	do
+		if ! test -d $j/
+		then
+			echo "# Not a directory: $sysfsdir/$j"
+			exit 0
+		else
+			break
+		fi
+	done
+	indexlist="`ls -d $i/cpu* | grep 'cpu[0-9][0-9]*' | head -1 | sed -e 's,^.*$,ls -d &/cache/index*,' | sh | sed -e 's,^.*/,,'`"
+	break
+done
+for i in node*/cpu*/cache/index*/shared_cpu_list
+do
+	if ! test -f $i
+	then
+		echo "# Not a file: $sysfsdir/$i"
+		exit 0
+	else
+		break
+	fi
+done
+firstshared=
+for i in $indexlist
+do
+	rm -f $T/cpulist
+	for n in node*
+	do
+		f="$n/cpu*/cache/$i/shared_cpu_list"
+		if ! cat $f > $T/msg 2>&1
+		then
+			sed -e 's/^/# /' < $T/msg
+			exit 0
+		fi
+		cat $f >> $T/cpulist
+	done
+	if grep -q '[-,]' $T/cpulist
+	then
+		if test -z "$firstshared"
+		then
+			firstshared="$i"
+		fi
+	fi
+done
+if test -z "$firstshared"
+then
+	splitindex="`echo $indexlist | sed -e 's/ .*$//'`"
+else
+	splitindex="$firstshared"
+fi
+nodenum=0
+for n in node*
+do
+	cat $n/cpu*/cache/$splitindex/shared_cpu_list | sort -u -k1n |
+	awk -v nodenum="$nodenum" '
+	BEGIN {
+		idx = 0;
+	}
+
+	{
+		nlists = split($0, cpulists, ",");
+		for (i = 1; i <= nlists; i++) {
+			listsize = split(cpulists[i], cpus, "-");
+			if (listsize == 1)
+				cpus[2] = cpus[1];
+			for (j = cpus[1]; j <= cpus[2]; j++) {
+				print "cpu[" nodenum "][" idx "] = " j ";";
+				idx++;
+			}
+		}
+	}
+
+	END {
+		print "nodecpus[" nodenum "] = " idx ";";
+	}'
+	nodenum=`expr $nodenum + 1`
+done
+echo "numnodes = $nodenum;"
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-build.sh b/tools/testing/selftests/rcutorture/bin/kvm-build.sh
new file mode 100755
index 000000000..5ad973dca
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-build.sh
@@ -0,0 +1,54 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Build a kvm-ready Linux kernel from the tree in the current directory.
+#
+# Usage: kvm-build.sh config-template resdir
+#
+# Copyright (C) IBM Corporation, 2011
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+if test -f "$TORTURE_STOPFILE"
+then
+	echo "kvm-build.sh early exit due to run STOP request"
+	exit 1
+fi
+
+config_template=${1}
+if test -z "$config_template" -o ! -f "$config_template" -o ! -r "$config_template"
+then
+	echo "kvm-build.sh :$config_template: Not a readable file"
+	exit 1
+fi
+resdir=${2}
+
+T=${TMPDIR-/tmp}/test-linux.sh.$$
+trap 'rm -rf $T' 0
+mkdir $T
+
+cp ${config_template} $T/config
+cat << ___EOF___ >> $T/config
+CONFIG_INITRAMFS_SOURCE="$TORTURE_INITRD"
+CONFIG_VIRTIO_PCI=y
+CONFIG_VIRTIO_CONSOLE=y
+___EOF___
+
+configinit.sh $T/config $resdir
+retval=$?
+if test $retval -gt 1
+then
+	exit 2
+fi
+
+# Tell "make" to use double the number of real CPUs on the build system.
+ncpus="`getconf _NPROCESSORS_ONLN`"
+make -j$((2 * ncpus)) $TORTURE_KMAKE_ARG > $resdir/Make.out 2>&1
+retval=$?
+if test $retval -ne 0 || grep "rcu[^/]*": < $resdir/Make.out | egrep -q "Stop|Error|error:|warning:" || egrep -q "Stop|Error|error:" < $resdir/Make.out
+then
+	echo Kernel build error
+	egrep "Stop|Error|error:|warning:" < $resdir/Make.out
+	echo Run aborted.
+	exit 3
+fi
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-check-branches.sh b/tools/testing/selftests/rcutorture/bin/kvm-check-branches.sh
new file mode 100755
index 000000000..ed0ec7f09
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-check-branches.sh
@@ -0,0 +1,102 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Run a group of kvm.sh tests on the specified commits.  This currently
+# unconditionally does three-minute runs on each scenario in CFLIST,
+# taking advantage of all available CPUs and trusting the "make" utility.
+# In the short term, adjustments can be made by editing this script and
+# CFLIST.  If some adjustments appear to have ongoing value, this script
+# might grow some command-line arguments.
+#
+# Usage: kvm-check-branches.sh commit1 commit2..commit3 commit4 ...
+#
+# This script considers its arguments one at a time.  If more elaborate
+# specification of commits is needed, please use "git rev-list" to
+# produce something that this simple script can understand.  The reason
+# for retaining the simplicity is that it allows the user to more easily
+# see which commit came from which branch.
+#
+# This script creates a yyyy.mm.dd-hh.mm.ss-group entry in the "res"
+# directory.  The calls to kvm.sh create the usual entries, but this script
+# moves them under the yyyy.mm.dd-hh.mm.ss-group entry, each in its own
+# directory numbered in run order, that is, "0001", "0002", and so on.
+# For successful runs, the large build artifacts are removed.  Doing this
+# reduces the disk space required by about two orders of magnitude for
+# successful runs.
+#
+# Copyright (C) Facebook, 2020
+#
+# Authors: Paul E. McKenney <paulmck@kernel.org>
+
+if ! git status > /dev/null 2>&1
+then
+	echo '!!!' This script needs to run in a git archive. 1>&2
+	echo '!!!' Giving up. 1>&2
+	exit 1
+fi
+
+# Remember where we started so that we can get back at the end.
+curcommit="`git status | head -1 | awk '{ print $NF }'`"
+
+nfail=0
+ntry=0
+resdir="tools/testing/selftests/rcutorture/res"
+ds="`date +%Y.%m.%d-%H.%M.%S`-group"
+if ! test -e $resdir
+then
+	mkdir $resdir || :
+fi
+mkdir $resdir/$ds
+echo Results directory: $resdir/$ds
+
+RCUTORTURE="`pwd`/tools/testing/selftests/rcutorture"; export RCUTORTURE
+PATH=${RCUTORTURE}/bin:$PATH; export PATH
+. functions.sh
+echo Using all `identify_qemu_vcpus` CPUs.
+
+# Each pass through this loop does one command-line argument.
+for gitbr in $@
+do
+	echo ' --- git branch ' $gitbr
+
+	# Each pass through this loop tests one commit.
+	for i in `git rev-list "$gitbr"`
+	do
+		ntry=`expr $ntry + 1`
+		idir=`awk -v ntry="$ntry" 'END { printf "%04d", ntry; }' < /dev/null`
+		echo ' --- commit ' $i from branch $gitbr
+		date
+		mkdir $resdir/$ds/$idir
+		echo $gitbr > $resdir/$ds/$idir/gitbr
+		echo $i >> $resdir/$ds/$idir/gitbr
+
+		# Test the specified commit.
+		git checkout $i > $resdir/$ds/$idir/git-checkout.out 2>&1
+		echo git checkout return code: $? "(Commit $ntry: $i)"
+		kvm.sh --allcpus --duration 3 --trust-make --datestamp "$ds/$idir" > $resdir/$ds/$idir/kvm.sh.out 2>&1
+		ret=$?
+		echo kvm.sh return code $ret for commit $i from branch $gitbr
+		echo Run results: $resdir/$ds/$idir
+		if test "$ret" -ne 0
+		then
+			# Failure, so leave all evidence intact.
+			nfail=`expr $nfail + 1`
+		else
+			# Success, so remove large files to save about 1GB.
+			( cd $resdir/$ds/$idir/$rrd; rm -f */vmlinux */bzImage */System.map */Module.symvers )
+		fi
+	done
+done
+date
+
+# Go back to the original commit.
+git checkout "$curcommit"
+
+if test $nfail -ne 0
+then
+	echo '!!! ' $nfail failures in $ntry 'runs!!!'
+	exit 1
+else
+	echo No failures in $ntry runs.
+	exit 0
+fi
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-end-run-stats.sh b/tools/testing/selftests/rcutorture/bin/kvm-end-run-stats.sh
new file mode 100755
index 000000000..ee886b40a
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-end-run-stats.sh
@@ -0,0 +1,40 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Check the status of the specified run.
+#
+# Usage: kvm-end-run-stats.sh /path/to/run starttime
+#
+# Copyright (C) 2021 Facebook, Inc.
+#
+# Authors: Paul E. McKenney <paulmck@kernel.org>
+
+# scriptname=$0
+# args="$*"
+rundir="$1"
+if ! test -d "$rundir"
+then
+	echo kvm-end-run-stats.sh: Specified run directory does not exist: $rundir
+	exit 1
+fi
+
+T=${TMPDIR-/tmp}/kvm-end-run-stats.sh.$$
+trap 'rm -rf $T' 0
+mkdir $T
+
+RCUTORTURE="`pwd`/tools/testing/selftests/rcutorture"; export RCUTORTURE
+PATH=${RCUTORTURE}/bin:$PATH; export PATH
+. functions.sh
+default_starttime="`get_starttime`"
+starttime="${2-default_starttime}"
+
+echo | tee -a "$rundir/log"
+echo | tee -a "$rundir/log"
+echo " --- `date` Test summary:" | tee -a "$rundir/log"
+echo Results directory: $rundir | tee -a "$rundir/log"
+kcsan-collapse.sh "$rundir" | tee -a "$rundir/log"
+kvm-recheck.sh "$rundir" > $T/kvm-recheck.sh.out 2>&1
+ret=$?
+cat $T/kvm-recheck.sh.out | tee -a "$rundir/log"
+echo " --- Done at `date` (`get_starttime_duration $starttime`) exitcode $ret" | tee -a "$rundir/log"
+exit $ret
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-find-errors.sh b/tools/testing/selftests/rcutorture/bin/kvm-find-errors.sh
new file mode 100755
index 000000000..88983cba7
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-find-errors.sh
@@ -0,0 +1,79 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Invoke a text editor on all console.log files for all runs with diagnostics,
+# that is, on all such files having a console.log.diags counterpart.
+# Note that both console.log.diags and console.log are passed to the
+# editor (currently defaulting to "vi"), allowing the user to get an
+# idea of what to search for in the console.log file.
+#
+# Usage: kvm-find-errors.sh directory
+#
+# The "directory" above should end with the date/time directory, for example,
+# "tools/testing/selftests/rcutorture/res/2018.02.25-14:27:27".
+# Returns error status reflecting the success (or not) of the specified run.
+#
+# Copyright (C) IBM Corporation, 2018
+#
+# Author: Paul E. McKenney <paulmck@linux.ibm.com>
+
+rundir="${1}"
+if test -z "$rundir" -o ! -d "$rundir"
+then
+	echo Directory "$rundir" not found.
+	echo Usage: $0 directory
+	exit 1
+fi
+editor=${EDITOR-vi}
+
+# Find builds with errors
+files=
+for i in ${rundir}/*/Make.out
+do
+	scenariodir="`dirname $i`"
+	scenariobasedir="`echo ${scenariodir} | sed -e 's/\.[0-9]*$//'`"
+	if egrep -q "error:|warning:|^ld: .*undefined reference to" < $i
+	then
+		egrep "error:|warning:|^ld: .*undefined reference to" < $i > $i.diags
+		files="$files $i.diags $i"
+	elif ! test -f ${scenariobasedir}/vmlinux && ! test -f "${rundir}/re-run"
+	then
+		echo No ${scenariobasedir}/vmlinux file > $i.diags
+		files="$files $i.diags $i"
+	fi
+done
+if test -n "$files"
+then
+	$editor $files
+	editorret=1
+else
+	echo No build errors.
+fi
+if grep -q -e "--build-\?only" < ${rundir}/log && ! test -f "${rundir}/remote-log"
+then
+	echo Build-only run, no console logs to check.
+	exit $editorret
+fi
+
+# Find console logs with errors
+files=
+for i in ${rundir}/*/console.log
+do
+	if test -r $i.diags
+	then
+		files="$files $i.diags $i"
+	fi
+done
+if test -n "$files"
+then
+	$editor $files
+	exit 1
+else
+	echo No errors in console logs.
+	if test -n "$editorret"
+	then
+		exit $editorret
+	else
+		exit 0
+	fi
+fi
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-get-cpus-script.sh b/tools/testing/selftests/rcutorture/bin/kvm-get-cpus-script.sh
new file mode 100755
index 000000000..20c7c53c5
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-get-cpus-script.sh
@@ -0,0 +1,88 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Create an awk script that takes as input numbers of CPUs and outputs
+# lists of CPUs, one per line in both cases.
+#
+# Usage: kvm-get-cpus-script.sh /path/to/cpu/arrays /path/to/put/script [ /path/to/state ]
+#
+# The CPU arrays are output by kvm-assign-cpus.sh, and are valid awk
+# statements initializing the variables describing the system's topology.
+#
+# The optional state is input by this script (if the file exists and is
+# non-empty), and can also be output by this script.
+
+cpuarrays="${1-/sys/devices/system/node}"
+scriptfile="${2}"
+statefile="${3}"
+
+if ! test -f "$cpuarrays"
+then
+	echo "File not found: $cpuarrays" 1>&2
+	exit 1
+fi
+scriptdir="`dirname "$scriptfile"`"
+if ! test -d "$scriptdir" || ! test -x "$scriptdir" || ! test -w "$scriptdir"
+then
+	echo "Directory not usable for script output: $scriptdir"
+	exit 1
+fi
+
+cat << '___EOF___' > "$scriptfile"
+BEGIN {
+___EOF___
+cat "$cpuarrays" >> "$scriptfile"
+if test -r "$statefile"
+then
+	cat "$statefile" >> "$scriptfile"
+fi
+cat << '___EOF___' >> "$scriptfile"
+}
+
+# Do we have the system architecture to guide CPU affinity?
+function gotcpus()
+{
+	return numnodes != "";
+}
+
+# Return a comma-separated list of the next n CPUs.
+function nextcpus(n,  i, s)
+{
+	for (i = 0; i < n; i++) {
+		if (nodecpus[curnode] == "")
+			curnode = 0;
+		if (cpu[curnode][curcpu[curnode]] == "")
+			curcpu[curnode] = 0;
+		if (s != "")
+			s = s ",";
+		s = s cpu[curnode][curcpu[curnode]];
+		curcpu[curnode]++;
+		curnode++
+	}
+	return s;
+}
+
+# Dump out the current node/CPU state so that a later invocation of this
+# script can continue where this one left off.  Of course, this only works
+# when a state file was specified and where there was valid sysfs state.
+# Returns 1 if the state was dumped, 0 otherwise.
+#
+# Dumping the state for one system configuration and loading it into
+# another isn't likely to do what you want, whatever that might be.
+function dumpcpustate(  i, fn)
+{
+___EOF___
+echo '	fn = "'"$statefile"'";' >> $scriptfile
+cat << '___EOF___' >> "$scriptfile"
+	if (fn != "" && gotcpus()) {
+		print "curnode = " curnode ";" > fn;
+		for (i = 0; i < numnodes; i++)
+			if (curcpu[i] != "")
+				print "curcpu[" i "] = " curcpu[i] ";" >> fn;
+		return 1;
+	}
+	if (fn != "")
+		print "# No CPU state to dump." > fn;
+	return 0;
+}
+___EOF___
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-lock.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-lock.sh
new file mode 100755
index 000000000..db2c0e2c8
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-lock.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Analyze a given results directory for locktorture progress.
+#
+# Usage: kvm-recheck-lock.sh resdir
+#
+# Copyright (C) IBM Corporation, 2014
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+i="$1"
+if test -d "$i" -a -r "$i"
+then
+	:
+else
+	echo Unreadable results directory: $i
+	exit 1
+fi
+
+configfile=`echo $i | sed -e 's/^.*\///'`
+ncs=`grep "Writes:  Total:" $i/console.log 2> /dev/null | tail -1 | sed -e 's/^.* Total: //' -e 's/ .*$//'`
+if test -z "$ncs"
+then
+	echo "$configfile -------"
+else
+	title="$configfile ------- $ncs acquisitions/releases"
+	dur=`grep -v '^#' $i/qemu-cmd | sed -e 's/^.* locktorture.shutdown_secs=//' -e 's/ .*$//' 2> /dev/null`
+	if test -z "$dur"
+	then
+		:
+	else
+		ncsps=`awk -v ncs=$ncs -v dur=$dur '
+			BEGIN { print ncs / dur }' < /dev/null`
+		title="$title ($ncsps per second)"
+	fi
+	echo $title
+fi
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh
new file mode 100755
index 000000000..43e138723
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh
@@ -0,0 +1,76 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Analyze a given results directory for rcutorture progress.
+#
+# Usage: kvm-recheck-rcu.sh resdir
+#
+# Copyright (C) IBM Corporation, 2014
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+i="$1"
+if test -d "$i" -a -r "$i"
+then
+	:
+else
+	echo Unreadable results directory: $i
+	exit 1
+fi
+. functions.sh
+
+configfile=`echo $i | sed -e 's/^.*\///'`
+ngps=`grep ver: $i/console.log 2> /dev/null | tail -1 | sed -e 's/^.* ver: //' -e 's/ .*$//'`
+stopstate="`grep 'End-test grace-period state: g' $i/console.log 2> /dev/null |
+	    tail -1 | sed -e 's/^\[[ 0-9.]*] //' |
+	    awk '{ print \"[\" $1 \" \" $5 \" \" $6 \" \" $7 \"]\"; }' |
+	    tr -d '\012\015'`"
+fwdprog="`grep 'rcu_torture_fwd_prog n_max_cbs: ' $i/console.log 2> /dev/null | sed -e 's/^\[[^]]*] //' | sort -k3nr | head -1 | awk '{ print $2 " " $3 }' | tr -d '\015'`"
+if test -z "$ngps"
+then
+	echo "$configfile ------- " $stopstate
+else
+	title="$configfile ------- $ngps GPs"
+	dur=`grep -v '^#' $i/qemu-cmd | sed -e 's/^.* rcutorture.shutdown_secs=//' -e 's/ .*$//'`
+	if test -z "$dur"
+	then
+		:
+	else
+		ngpsps=`awk -v ngps=$ngps -v dur=$dur '
+			BEGIN { print ngps / dur }' < /dev/null`
+		title="$title ($ngpsps/s)"
+	fi
+	echo $title $stopstate $fwdprog
+	nclosecalls=`grep --binary-files=text 'torture: Reader Batch' $i/console.log | tail -1 | \
+		awk -v sum=0 '
+		{
+			for (i = 0; i <= NF; i++) {
+				sum += $i;
+				if ($i ~ /Batch:/) {
+					sum = 0;
+					i = i + 2;
+				}
+			}
+		}
+
+		END {
+			print sum
+		}'`
+	if test -z "$nclosecalls"
+	then
+		exit 0
+	fi
+	if test "$nclosecalls" -eq 0
+	then
+		exit 0
+	fi
+	# Compute number of close calls per tenth of an hour
+	nclosecalls10=`awk -v nclosecalls=$nclosecalls -v dur=$dur 'BEGIN { print int(nclosecalls * 36000 / dur) }' < /dev/null`
+	if test $nclosecalls10 -gt 5 -a $nclosecalls -gt 1
+	then
+		print_bug $nclosecalls "Reader Batch close calls in" $(($dur/60)) minute run: $i
+	else
+		print_warning $nclosecalls "Reader Batch close calls in" $(($dur/60)) minute run: $i
+	fi
+	echo $nclosecalls "Reader Batch close calls in" $(($dur/60)) minute run: $i > $i/console.log.rcu.diags
+fi
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuscale-ftrace.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuscale-ftrace.sh
new file mode 100755
index 000000000..d4bec5380
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuscale-ftrace.sh
@@ -0,0 +1,109 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Analyze a given results directory for rcuscale performance measurements,
+# looking for ftrace data.  Exits with 0 if data was found, analyzed, and
+# printed.  Intended to be invoked from kvm-recheck-rcuscale.sh after
+# argument checking.
+#
+# Usage: kvm-recheck-rcuscale-ftrace.sh resdir
+#
+# Copyright (C) IBM Corporation, 2016
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+i="$1"
+. functions.sh
+
+if test "`grep -c 'rcu_exp_grace_period.*start' < $i/console.log`" -lt 100
+then
+	exit 10
+fi
+
+sed -e 's/^\[[^]]*]//' < $i/console.log |
+grep 'us : rcu_exp_grace_period' |
+sed -e 's/us : / : /' |
+tr -d '\015' |
+awk '
+$8 == "start" {
+	if (startseq != "")
+		nlost++;
+	starttask = $1;
+	starttime = $3;
+	startseq = $7;
+	seqtask[startseq] = starttask;
+}
+
+$8 == "end" {
+	if (startseq == $7) {
+		curgpdur = $3 - starttime;
+		gptimes[++n] = curgpdur;
+		gptaskcnt[starttask]++;
+		sum += curgpdur;
+		if (curgpdur > 1000)
+			print "Long GP " starttime "us to " $3 "us (" curgpdur "us)";
+		startseq = "";
+	} else {
+		# Lost a message or some such, reset.
+		startseq = "";
+		nlost++;
+	}
+}
+
+$8 == "done" && seqtask[$7] != $1 {
+	piggybackcnt[$1]++;
+}
+
+END {
+	newNR = asort(gptimes);
+	if (newNR <= 0) {
+		print "No ftrace records found???"
+		exit 10;
+	}
+	pct50 = int(newNR * 50 / 100);
+	if (pct50 < 1)
+		pct50 = 1;
+	pct90 = int(newNR * 90 / 100);
+	if (pct90 < 1)
+		pct90 = 1;
+	pct99 = int(newNR * 99 / 100);
+	if (pct99 < 1)
+		pct99 = 1;
+	div = 10 ** int(log(gptimes[pct90]) / log(10) + .5) / 100;
+	print "Histogram bucket size: " div;
+	last = gptimes[1] - 10;
+	count = 0;
+	for (i = 1; i <= newNR; i++) {
+		current = div * int(gptimes[i] / div);
+		if (last == current) {
+			count++;
+		} else {
+			if (count > 0)
+				print last, count;
+			count = 1;
+			last = current;
+		}
+	}
+	if (count > 0)
+		print last, count;
+	print "Distribution of grace periods across tasks:";
+	for (i in gptaskcnt) {
+		print "\t" i, gptaskcnt[i];
+		nbatches += gptaskcnt[i];
+	}
+	ngps = nbatches;
+	print "Distribution of piggybacking across tasks:";
+	for (i in piggybackcnt) {
+		print "\t" i, piggybackcnt[i];
+		ngps += piggybackcnt[i];
+	}
+	print "Average grace-period duration: " sum / newNR " microseconds";
+	print "Minimum grace-period duration: " gptimes[1];
+	print "50th percentile grace-period duration: " gptimes[pct50];
+	print "90th percentile grace-period duration: " gptimes[pct90];
+	print "99th percentile grace-period duration: " gptimes[pct99];
+	print "Maximum grace-period duration: " gptimes[newNR];
+	print "Grace periods: " ngps + 0 " Batches: " nbatches + 0 " Ratio: " ngps / nbatches " Lost: " nlost + 0;
+	print "Computed from ftrace data.";
+}'
+exit 0
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuscale.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuscale.sh
new file mode 100755
index 000000000..b58211317
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuscale.sh
@@ -0,0 +1,83 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Analyze a given results directory for rcuscale scalability measurements.
+#
+# Usage: kvm-recheck-rcuscale.sh resdir
+#
+# Copyright (C) IBM Corporation, 2016
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+i="$1"
+if test -d "$i" -a -r "$i"
+then
+	:
+else
+	echo Unreadable results directory: $i
+	exit 1
+fi
+PATH=`pwd`/tools/testing/selftests/rcutorture/bin:$PATH; export PATH
+. functions.sh
+
+if kvm-recheck-rcuscale-ftrace.sh $i
+then
+	# ftrace data was successfully analyzed, call it good!
+	exit 0
+fi
+
+configfile=`echo $i | sed -e 's/^.*\///'`
+
+sed -e 's/^\[[^]]*]//' < $i/console.log |
+awk '
+/-scale: .* gps: .* batches:/ {
+	ngps = $9;
+	nbatches = 1;
+}
+
+/-scale: .*writer-duration/ {
+	gptimes[++n] = $5 / 1000.;
+	sum += $5 / 1000.;
+}
+
+END {
+	newNR = asort(gptimes);
+	if (newNR <= 0) {
+		print "No rcuscale records found???"
+		exit;
+	}
+	pct50 = int(newNR * 50 / 100);
+	if (pct50 < 1)
+		pct50 = 1;
+	pct90 = int(newNR * 90 / 100);
+	if (pct90 < 1)
+		pct90 = 1;
+	pct99 = int(newNR * 99 / 100);
+	if (pct99 < 1)
+		pct99 = 1;
+	div = 10 ** int(log(gptimes[pct90]) / log(10) + .5) / 100;
+	print "Histogram bucket size: " div;
+	last = gptimes[1] - 10;
+	count = 0;
+	for (i = 1; i <= newNR; i++) {
+		current = div * int(gptimes[i] / div);
+		if (last == current) {
+			count++;
+		} else {
+			if (count > 0)
+				print last, count;
+			count = 1;
+			last = current;
+		}
+	}
+	if (count > 0)
+		print last, count;
+	print "Average grace-period duration: " sum / newNR " microseconds";
+	print "Minimum grace-period duration: " gptimes[1];
+	print "50th percentile grace-period duration: " gptimes[pct50];
+	print "90th percentile grace-period duration: " gptimes[pct90];
+	print "99th percentile grace-period duration: " gptimes[pct99];
+	print "Maximum grace-period duration: " gptimes[newNR];
+	print "Grace periods: " ngps + 0 " Batches: " nbatches + 0 " Ratio: " ngps / nbatches;
+	print "Computed from rcuscale printk output.";
+}'
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-refscale.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-refscale.sh
new file mode 100755
index 000000000..35a463ddd
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-refscale.sh
@@ -0,0 +1,71 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Analyze a given results directory for refscale performance measurements.
+#
+# Usage: kvm-recheck-refscale.sh resdir
+#
+# Copyright (C) IBM Corporation, 2016
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+i="$1"
+if test -d "$i" -a -r "$i"
+then
+	:
+else
+	echo Unreadable results directory: $i
+	exit 1
+fi
+PATH=`pwd`/tools/testing/selftests/rcutorture/bin:$PATH; export PATH
+. functions.sh
+
+configfile=`echo $i | sed -e 's/^.*\///'`
+
+sed -e 's/^\[[^]]*]//' < $i/console.log | tr -d '\015' |
+awk -v configfile="$configfile" '
+/^[ 	]*Runs	Time\(ns\) *$/ {
+	if (dataphase + 0 == 0) {
+		dataphase = 1;
+		# print configfile, $0;
+	}
+	next;
+}
+
+/[^ 	]*[0-9][0-9]*	[0-9][0-9]*\.[0-9][0-9]*$/ {
+	if (dataphase == 1) {
+		# print $0;
+		readertimes[++n] = $2;
+		sum += $2;
+	}
+	next;
+}
+
+{
+	if (dataphase == 1)
+		dataphase == 2;
+	next;
+}
+
+END {
+	print configfile " results:";
+	newNR = asort(readertimes);
+	if (newNR <= 0) {
+		print "No refscale records found???"
+		exit;
+	}
+	medianidx = int(newNR / 2);
+	if (newNR == medianidx * 2)
+		medianvalue = (readertimes[medianidx - 1] + readertimes[medianidx]) / 2;
+	else
+		medianvalue = readertimes[medianidx];
+	points = "Points:";
+	for (i = 1; i <= newNR; i++)
+		points = points " " readertimes[i];
+	print points;
+	print "Average reader duration: " sum / newNR " nanoseconds";
+	print "Minimum reader duration: " readertimes[1];
+	print "Median reader duration: " medianvalue;
+	print "Maximum reader duration: " readertimes[newNR];
+	print "Computed from refscale printk output.";
+}'
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-scf.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-scf.sh
new file mode 100755
index 000000000..3afa5c6ed
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-scf.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Analyze a given results directory for rcutorture progress.
+#
+# Usage: kvm-recheck-rcu.sh resdir
+#
+# Copyright (C) Facebook, 2020
+#
+# Authors: Paul E. McKenney <paulmck@kernel.org>
+
+i="$1"
+if test -d "$i" -a -r "$i"
+then
+	:
+else
+	echo Unreadable results directory: $i
+	exit 1
+fi
+. functions.sh
+
+configfile=`echo $i | sed -e 's/^.*\///'`
+nscfs="`grep 'scf_invoked_count ver:' $i/console.log 2> /dev/null | tail -1 | sed -e 's/^.* scf_invoked_count ver: //' -e 's/ .*$//' | tr -d '\015'`"
+if test -z "$nscfs"
+then
+	echo "$configfile ------- "
+else
+	dur="`grep -v '^#' $i/qemu-cmd | sed -e 's/^.* scftorture.shutdown_secs=//' -e 's/ .*$//' 2> /dev/null`"
+	if test -z "$dur"
+	then
+		rate=""
+	else
+		nscfss=`awk -v nscfs=$nscfs -v dur=$dur '
+			BEGIN { print nscfs / dur }' < /dev/null`
+		rate=" ($nscfss/s)"
+	fi
+	echo "${configfile} ------- ${nscfs} SCF handler invocations$rate"
+fi
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck.sh
new file mode 100755
index 000000000..0789c5606
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck.sh
@@ -0,0 +1,110 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Given the results directories for previous KVM-based torture runs,
+# check the build and console output for errors.  Given a directory
+# containing results directories, this recursively checks them all.
+#
+# Usage: kvm-recheck.sh resdir ...
+#
+# Returns status reflecting the success or not of the last run specified.
+#
+# Copyright (C) IBM Corporation, 2011
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+T=/tmp/kvm-recheck.sh.$$
+trap 'rm -f $T' 0 2
+
+PATH=`pwd`/tools/testing/selftests/rcutorture/bin:$PATH; export PATH
+. functions.sh
+for rd in "$@"
+do
+	firsttime=1
+	dirs=`find $rd -name Make.defconfig.out -print | sort | sed -e 's,/[^/]*$,,' | sort -u`
+	for i in $dirs
+	do
+		if test -n "$firsttime"
+		then
+			firsttime=""
+			resdir=`echo $i | sed -e 's,/$,,' -e 's,/[^/]*$,,'`
+			head -1 $resdir/log
+		fi
+		TORTURE_SUITE="`cat $i/../torture_suite`"
+		configfile=`echo $i | sed -e 's,^.*/,,'`
+		rm -f $i/console.log.*.diags
+		case "${TORTURE_SUITE}" in
+		X*)
+			;;
+		*)
+			kvm-recheck-${TORTURE_SUITE}.sh $i
+		esac
+		if test -f "$i/qemu-retval" && test "`cat $i/qemu-retval`" -ne 0 && test "`cat $i/qemu-retval`" -ne 137
+		then
+			echo QEMU error, output:
+			cat $i/qemu-output
+		elif test -f "$i/console.log"
+		then
+			if test -f "$i/qemu-retval" && test "`cat $i/qemu-retval`" -eq 137
+			then
+				echo QEMU killed
+			fi
+			configcheck.sh $i/.config $i/ConfigFragment > $T 2>&1
+			cat $T
+			if test -r $i/Make.oldconfig.err
+			then
+				cat $i/Make.oldconfig.err
+			fi
+			parse-build.sh $i/Make.out $configfile
+			parse-console.sh $i/console.log $configfile
+			if test -r $i/Warnings
+			then
+				cat $i/Warnings
+			fi
+		else
+			if test -f "$i/buildonly"
+			then
+				echo Build-only run, no boot/test
+				configcheck.sh $i/.config $i/ConfigFragment
+				parse-build.sh $i/Make.out $configfile
+			elif test -f "$i/qemu-cmd"
+			then
+				print_bug qemu failed
+				echo "   $i"
+			else
+				print_bug Build failed
+				echo "   $i"
+			fi
+		fi
+	done
+	if test -f "$rd/kcsan.sum"
+	then
+		if ! test -f $T
+		then
+			:
+		elif grep -q CONFIG_KCSAN=y $T
+		then
+			echo "Compiler or architecture does not support KCSAN!"
+			echo Did you forget to switch your compiler with '--kmake-arg CC=<cc-that-supports-kcsan>'?
+		elif test -s "$rd/kcsan.sum"
+		then
+			echo KCSAN summary in $rd/kcsan.sum
+		else
+			echo Clean KCSAN run in $rd
+		fi
+	fi
+done
+EDITOR=echo kvm-find-errors.sh "${@: -1}" > $T 2>&1
+builderrors="`tr ' ' '\012' < $T | grep -c '/Make.out.diags'`"
+if test "$builderrors" -gt 0
+then
+	echo $builderrors runs with build errors.
+	ret=1
+fi
+runerrors="`tr ' ' '\012' < $T | grep -c '/console.log.diags'`"
+if test "$runerrors" -gt 0
+then
+	echo $runerrors runs with runtime errors.
+	ret=2
+fi
+exit $ret
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-remote-noreap.sh b/tools/testing/selftests/rcutorture/bin/kvm-remote-noreap.sh
new file mode 100755
index 000000000..014ce6826
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-remote-noreap.sh
@@ -0,0 +1,30 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Periodically scan a directory tree to prevent files from being reaped
+# by systemd and friends on long runs.
+#
+# Usage: kvm-remote-noreap.sh pathname
+#
+# Copyright (C) 2021 Facebook, Inc.
+#
+# Authors: Paul E. McKenney <paulmck@kernel.org>
+
+pathname="$1"
+if test "$pathname" = ""
+then
+	echo Usage: kvm-remote-noreap.sh pathname
+	exit 1
+fi
+if ! test -d "$pathname"
+then
+	echo  Usage: kvm-remote-noreap.sh pathname
+	echo "       pathname must be a directory."
+	exit 2
+fi
+
+while test -d "$pathname"
+do
+	find "$pathname" -type f -exec touch -c {} \; > /dev/null 2>&1
+	sleep 30
+done
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-remote.sh b/tools/testing/selftests/rcutorture/bin/kvm-remote.sh
new file mode 100755
index 000000000..9f0a5d5ff
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-remote.sh
@@ -0,0 +1,275 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Run a series of tests on remote systems under KVM.
+#
+# Usage: kvm-remote.sh "systems" [ <kvm.sh args> ]
+#	 kvm-remote.sh "systems" /path/to/old/run [ <kvm-again.sh args> ]
+#
+# Copyright (C) 2021 Facebook, Inc.
+#
+# Authors: Paul E. McKenney <paulmck@kernel.org>
+
+scriptname=$0
+args="$*"
+
+if ! test -d tools/testing/selftests/rcutorture/bin
+then
+	echo $scriptname must be run from top-level directory of kernel source tree.
+	exit 1
+fi
+
+RCUTORTURE="`pwd`/tools/testing/selftests/rcutorture"; export RCUTORTURE
+PATH=${RCUTORTURE}/bin:$PATH; export PATH
+. functions.sh
+
+starttime="`get_starttime`"
+
+systems="$1"
+if test -z "$systems"
+then
+	echo $scriptname: Empty list of systems will go nowhere good, giving up.
+	exit 1
+fi
+shift
+
+# Pathnames:
+# T:	  /tmp/kvm-remote.sh.$$
+# resdir: /tmp/kvm-remote.sh.$$/res
+# rundir: /tmp/kvm-remote.sh.$$/res/$ds ("-remote" suffix)
+# oldrun: `pwd`/tools/testing/.../res/$otherds
+#
+# Pathname segments:
+# TD:	  kvm-remote.sh.$$
+# ds:	  yyyy.mm.dd-hh.mm.ss-remote
+
+TD=kvm-remote.sh.$$
+T=${TMPDIR-/tmp}/$TD
+trap 'rm -rf $T' 0
+mkdir $T
+
+resdir="$T/res"
+ds=`date +%Y.%m.%d-%H.%M.%S`-remote
+rundir=$resdir/$ds
+echo Results directory: $rundir
+echo $scriptname $args
+if echo $1 | grep -q '^--'
+then
+	# Fresh build.  Create a datestamp unless the caller supplied one.
+	datestamp="`echo "$@" | awk -v ds="$ds" '{
+		for (i = 1; i < NF; i++) {
+			if ($i == "--datestamp") {
+				ds = "";
+				break;
+			}
+		}
+		if (ds != "")
+			print "--datestamp " ds;
+	}'`"
+	kvm.sh --remote "$@" $datestamp --buildonly > $T/kvm.sh.out 2>&1
+	ret=$?
+	if test "$ret" -ne 0
+	then
+		echo $scriptname: kvm.sh failed exit code $?
+		cat $T/kvm.sh.out
+		exit 2
+	fi
+	oldrun="`grep -m 1 "^Results directory: " $T/kvm.sh.out | awk '{ print $3 }'`"
+	touch "$oldrun/remote-log"
+	echo $scriptname $args >> "$oldrun/remote-log"
+	echo | tee -a "$oldrun/remote-log"
+	echo " ----" kvm.sh output: "(`date`)" | tee -a "$oldrun/remote-log"
+	cat $T/kvm.sh.out | tee -a "$oldrun/remote-log"
+	# We are going to run this, so remove the buildonly files.
+	rm -f "$oldrun"/*/buildonly
+	kvm-again.sh $oldrun --dryrun --remote --rundir "$rundir" > $T/kvm-again.sh.out 2>&1
+	ret=$?
+	if test "$ret" -ne 0
+	then
+		echo $scriptname: kvm-again.sh failed exit code $? | tee -a "$oldrun/remote-log"
+		cat $T/kvm-again.sh.out | tee -a "$oldrun/remote-log"
+		exit 2
+	fi
+else
+	# Re-use old run.
+	oldrun="$1"
+	if ! echo $oldrun | grep -q '^/'
+	then
+		oldrun="`pwd`/$oldrun"
+	fi
+	shift
+	touch "$oldrun/remote-log"
+	echo $scriptname $args >> "$oldrun/remote-log"
+	kvm-again.sh "$oldrun" "$@" --dryrun --remote --rundir "$rundir" > $T/kvm-again.sh.out 2>&1
+	ret=$?
+	if test "$ret" -ne 0
+	then
+		echo $scriptname: kvm-again.sh failed exit code $? | tee -a "$oldrun/remote-log"
+		cat $T/kvm-again.sh.out | tee -a "$oldrun/remote-log"
+		exit 2
+	fi
+	cp -a "$rundir" "$RCUTORTURE/res/"
+	oldrun="$RCUTORTURE/res/$ds"
+fi
+echo | tee -a "$oldrun/remote-log"
+echo " ----" kvm-again.sh output: "(`date`)" | tee -a "$oldrun/remote-log"
+cat $T/kvm-again.sh.out
+echo | tee -a "$oldrun/remote-log"
+echo Remote run directory: $rundir | tee -a "$oldrun/remote-log"
+echo Local build-side run directory: $oldrun | tee -a "$oldrun/remote-log"
+
+# Create the kvm-remote-N.sh scripts in the bin directory.
+awk < "$rundir"/scenarios -v dest="$T/bin" -v rundir="$rundir" '
+{
+	n = $1;
+	sub(/\./, "", n);
+	fn = dest "/kvm-remote-" n ".sh"
+	print "kvm-remote-noreap.sh " rundir " &" > fn;
+	scenarios = "";
+	for (i = 2; i <= NF; i++)
+		scenarios = scenarios " " $i;
+	print "kvm-test-1-run-batch.sh" scenarios >> fn;
+	print "sync" >> fn;
+	print "rm " rundir "/remote.run" >> fn;
+}'
+chmod +x $T/bin/kvm-remote-*.sh
+( cd "`dirname $T`"; tar -chzf $T/binres.tgz "$TD/bin" "$TD/res" )
+
+# Check first to avoid the need for cleanup for system-name typos
+for i in $systems
+do
+	ncpus="`ssh -o BatchMode=yes $i getconf _NPROCESSORS_ONLN 2> /dev/null`"
+	ret=$?
+	if test "$ret" -ne 0
+	then
+		echo System $i unreachable, giving up. | tee -a "$oldrun/remote-log"
+		exit 4
+	fi
+	echo $i: $ncpus CPUs " " `date` | tee -a "$oldrun/remote-log"
+done
+
+# Download and expand the tarball on all systems.
+echo Build-products tarball: `du -h $T/binres.tgz` | tee -a "$oldrun/remote-log"
+for i in $systems
+do
+	echo Downloading tarball to $i `date` | tee -a "$oldrun/remote-log"
+	cat $T/binres.tgz | ssh -o BatchMode=yes $i "cd /tmp; tar -xzf -"
+	ret=$?
+	tries=0
+	while test "$ret" -ne 0
+	do
+		echo Unable to download $T/binres.tgz to system $i, waiting and then retrying.  $tries prior retries. | tee -a "$oldrun/remote-log"
+		sleep 60
+		cat $T/binres.tgz | ssh -o BatchMode=yes $i "cd /tmp; tar -xzf -"
+		ret=$?
+		if test "$ret" -ne 0
+		then
+			if test "$tries" > 5
+			then
+				echo Unable to download $T/binres.tgz to system $i, giving up. | tee -a "$oldrun/remote-log"
+				exit 10
+			fi
+		fi
+		tries=$((tries+1))
+	done
+done
+
+# Function to check for presence of a file on the specified system.
+# Complain if the system cannot be reached, and retry after a wait.
+# Currently just waits forever if a machine disappears.
+#
+# Usage: checkremotefile system pathname
+checkremotefile () {
+	local ret
+	local sleeptime=60
+
+	while :
+	do
+		ssh -o BatchMode=yes $1 "test -f \"$2\""
+		ret=$?
+		if test "$ret" -eq 255
+		then
+			echo " ---" ssh failure to $1 checking for file $2, retry after $sleeptime seconds. `date` | tee -a "$oldrun/remote-log"
+		elif test "$ret" -eq 0
+		then
+			return 0
+		elif test "$ret" -eq 1
+		then
+			echo " ---" File \"$2\" not found: ssh $1 test -f \"$2\" | tee -a "$oldrun/remote-log"
+			return 1
+		else
+			echo " ---" Exit code $ret: ssh $1 test -f \"$2\", retry after $sleeptime seconds. `date` | tee -a "$oldrun/remote-log"
+			return $ret
+		fi
+		sleep $sleeptime
+	done
+}
+
+# Function to start batches on idle remote $systems
+#
+# Usage: startbatches curbatch nbatches
+#
+# Batches are numbered starting at 1.  Returns the next batch to start.
+# Be careful to redirect all debug output to FD 2 (stderr).
+startbatches () {
+	local curbatch="$1"
+	local nbatches="$2"
+	local ret
+
+	# Each pass through the following loop examines one system.
+	for i in $systems
+	do
+		if test "$curbatch" -gt "$nbatches"
+		then
+			echo $((nbatches + 1))
+			return 0
+		fi
+		if checkremotefile "$i" "$resdir/$ds/remote.run" 1>&2
+		then
+			continue # System still running last test, skip.
+		fi
+		ssh -o BatchMode=yes "$i" "cd \"$resdir/$ds\"; touch remote.run; PATH=\"$T/bin:$PATH\" nohup kvm-remote-$curbatch.sh > kvm-remote-$curbatch.sh.out 2>&1 &" 1>&2
+		ret=$?
+		if test "$ret" -ne 0
+		then
+			echo ssh $i failed: exitcode $ret 1>&2
+			exit 11
+		fi
+		echo " ----" System $i Batch `head -n $curbatch < "$rundir"/scenarios | tail -1` `date` 1>&2
+		curbatch=$((curbatch + 1))
+	done
+	echo $curbatch
+}
+
+# Launch all the scenarios.
+nbatches="`wc -l "$rundir"/scenarios | awk '{ print $1 }'`"
+curbatch=1
+while test "$curbatch" -le "$nbatches"
+do
+	startbatches $curbatch $nbatches > $T/curbatch 2> $T/startbatches.stderr
+	curbatch="`cat $T/curbatch`"
+	if test -s "$T/startbatches.stderr"
+	then
+		cat "$T/startbatches.stderr" | tee -a "$oldrun/remote-log"
+	fi
+	if test "$curbatch" -le "$nbatches"
+	then
+		sleep 30
+	fi
+done
+echo All batches started. `date` | tee -a "$oldrun/remote-log"
+
+# Wait for all remaining scenarios to complete and collect results.
+for i in $systems
+do
+	echo " ---" Waiting for $i `date` | tee -a "$oldrun/remote-log"
+	while checkremotefile "$i" "$resdir/$ds/remote.run"
+	do
+		sleep 30
+	done
+	echo " ---" Collecting results from $i `date` | tee -a "$oldrun/remote-log"
+	( cd "$oldrun"; ssh -o BatchMode=yes $i "cd $rundir; tar -czf - kvm-remote-*.sh.out */console.log */kvm-test-1-run*.sh.out */qemu[_-]pid */qemu-retval */qemu-affinity; rm -rf $T > /dev/null 2>&1" | tar -xzf - )
+done
+
+( kvm-end-run-stats.sh "$oldrun" "$starttime"; echo $? > $T/exitcode ) | tee -a "$oldrun/remote-log"
+exit "`cat $T/exitcode`"
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-test-1-run-batch.sh b/tools/testing/selftests/rcutorture/bin/kvm-test-1-run-batch.sh
new file mode 100755
index 000000000..1e29d6565
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-test-1-run-batch.sh
@@ -0,0 +1,91 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Carry out a kvm-based run for the specified batch of scenarios, which
+# might have been built by --build-only kvm.sh run.
+#
+# Usage: kvm-test-1-run-batch.sh SCENARIO [ SCENARIO ... ]
+#
+# Each SCENARIO is the name of a directory in the current directory
+#	containing a ready-to-run qemu-cmd file.
+#
+# Copyright (C) 2021 Facebook, Inc.
+#
+# Authors: Paul E. McKenney <paulmck@kernel.org>
+
+T=${TMPDIR-/tmp}/kvm-test-1-run-batch.sh.$$
+trap 'rm -rf $T' 0
+mkdir $T
+
+echo ---- Running batch $*
+# Check arguments
+runfiles=
+for i in "$@"
+do
+	if ! echo $i | grep -q '^[^/.a-z]\+\(\.[0-9]\+\)\?$'
+	then
+		echo Bad scenario name: \"$i\" 1>&2
+		exit 1
+	fi
+	if ! test -d "$i"
+	then
+		echo Scenario name not a directory: \"$i\" 1>&2
+		exit 2
+	fi
+	if ! test -f "$i/qemu-cmd"
+	then
+		echo Scenario lacks a command file: \"$i/qemu-cmd\" 1>&2
+		exit 3
+	fi
+	rm -f $i/build.*
+	touch $i/build.run
+	runfiles="$runfiles $i/build.run"
+done
+
+# Extract settings from the qemu-cmd file.
+grep '^#' $1/qemu-cmd | sed -e 's/^# //' > $T/qemu-cmd-settings
+. $T/qemu-cmd-settings
+
+# Start up jitter, start each scenario, wait, end jitter.
+echo ---- System running test: `uname -a`
+echo ---- Starting kernels. `date` | tee -a log
+$TORTURE_JITTER_START
+kvm-assign-cpus.sh /sys/devices/system/node > $T/cpuarray.awk
+for i in "$@"
+do
+	echo ---- System running test: `uname -a` > $i/kvm-test-1-run-qemu.sh.out
+	echo > $i/kvm-test-1-run-qemu.sh.out
+	export TORTURE_AFFINITY=
+	kvm-get-cpus-script.sh $T/cpuarray.awk $T/cpubatches.awk $T/cpustate
+	cat << '	___EOF___' >> $T/cpubatches.awk
+	END {
+		affinitylist = "";
+		if (!gotcpus()) {
+			print "echo No CPU-affinity information, so no taskset command.";
+		} else if (cpu_count !~ /^[0-9][0-9]*$/) {
+			print "echo " scenario ": Bogus number of CPUs (old qemu-cmd?), so no taskset command.";
+		} else {
+			affinitylist = nextcpus(cpu_count);
+			if (!(affinitylist ~ /^[0-9,-][0-9,-]*$/))
+				print "echo " scenario ": Bogus CPU-affinity information, so no taskset command.";
+			else if (!dumpcpustate())
+				print "echo " scenario ": Could not dump state, so no taskset command.";
+			else
+				print "export TORTURE_AFFINITY=" affinitylist;
+		}
+	}
+	___EOF___
+	cpu_count="`grep '# TORTURE_CPU_COUNT=' $i/qemu-cmd | sed -e 's/^.*=//'`"
+	affinity_export="`awk -f $T/cpubatches.awk -v cpu_count="$cpu_count" -v scenario=$i < /dev/null`"
+	$affinity_export
+	kvm-test-1-run-qemu.sh $i >> $i/kvm-test-1-run-qemu.sh.out 2>&1 &
+done
+for i in $runfiles
+do
+	while ls $i > /dev/null 2>&1
+	do
+		:
+	done
+done
+echo ---- All kernel runs complete. `date` | tee -a log
+$TORTURE_JITTER_STOP
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-test-1-run-qemu.sh b/tools/testing/selftests/rcutorture/bin/kvm-test-1-run-qemu.sh
new file mode 100755
index 000000000..44280582c
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-test-1-run-qemu.sh
@@ -0,0 +1,185 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Carry out a kvm-based run for the specified qemu-cmd file, which might
+# have been generated by --build-only kvm.sh run.
+#
+# Usage: kvm-test-1-run-qemu.sh qemu-cmd-dir
+#
+# qemu-cmd-dir provides the directory containing qemu-cmd file.
+#	This is assumed to be of the form prefix/ds/scenario, where
+#	"ds" is the top-level date-stamped directory and "scenario"
+#	is the scenario name.  Any required adjustments to this file
+#	must have been made by the caller.  The shell-command comments
+#	at the end of the qemu-cmd file are not optional.
+#
+# Copyright (C) 2021 Facebook, Inc.
+#
+# Authors: Paul E. McKenney <paulmck@kernel.org>
+
+T=${TMPDIR-/tmp}/kvm-test-1-run-qemu.sh.$$
+trap 'rm -rf $T' 0
+mkdir $T
+
+resdir="$1"
+if ! test -d "$resdir"
+then
+	echo $0: Nonexistent directory: $resdir
+	exit 1
+fi
+if ! test -f "$resdir/qemu-cmd"
+then
+	echo $0: Nonexistent qemu-cmd file: $resdir/qemu-cmd
+	exit 1
+fi
+
+echo ' ---' `date`: Starting kernel, PID $$
+
+# Obtain settings from the qemu-cmd file.
+grep '^#' $resdir/qemu-cmd | sed -e 's/^# //' > $T/qemu-cmd-settings
+. $T/qemu-cmd-settings
+
+# Decorate qemu-cmd with affinity, redirection, backgrounding, and PID capture
+taskset_command=
+if test -n "$TORTURE_AFFINITY"
+then
+	taskset_command="taskset -c $TORTURE_AFFINITY "
+fi
+sed -e 's/^[^#].*$/'"$taskset_command"'& 2>\&1 \&/' < $resdir/qemu-cmd > $T/qemu-cmd
+echo 'qemu_pid=$!' >> $T/qemu-cmd
+echo 'echo $qemu_pid > $resdir/qemu-pid' >> $T/qemu-cmd
+echo 'taskset -c -p $qemu_pid > $resdir/qemu-affinity' >> $T/qemu-cmd
+
+# In case qemu refuses to run...
+echo "NOTE: $QEMU either did not run or was interactive" > $resdir/console.log
+
+# Attempt to run qemu
+kstarttime=`gawk 'BEGIN { print systime() }' < /dev/null`
+( . $T/qemu-cmd; wait `cat  $resdir/qemu-pid`; echo $? > $resdir/qemu-retval ) &
+commandcompleted=0
+if test -z "$TORTURE_KCONFIG_GDB_ARG"
+then
+	sleep 10 # Give qemu's pid a chance to reach the file
+	if test -s "$resdir/qemu-pid"
+	then
+		qemu_pid=`cat "$resdir/qemu-pid"`
+		echo Monitoring qemu job at pid $qemu_pid `date`
+	else
+		qemu_pid=""
+		echo Monitoring qemu job at yet-as-unknown pid `date`
+	fi
+fi
+if test -n "$TORTURE_KCONFIG_GDB_ARG"
+then
+	base_resdir=`echo $resdir | sed -e 's/\.[0-9]\+$//'`
+	if ! test -f $base_resdir/vmlinux
+	then
+		base_resdir="`cat re-run`/$resdir"
+		if ! test -f $base_resdir/vmlinux
+		then
+			base_resdir=/path/to
+		fi
+	fi
+	echo Waiting for you to attach a debug session, for example: > /dev/tty
+	echo "    gdb $base_resdir/vmlinux" > /dev/tty
+	echo 'After symbols load and the "(gdb)" prompt appears:' > /dev/tty
+	echo "    target remote :1234" > /dev/tty
+	echo "    continue" > /dev/tty
+	kstarttime=`gawk 'BEGIN { print systime() }' < /dev/null`
+fi
+while :
+do
+	if test -z "$qemu_pid" && test -s "$resdir/qemu-pid"
+	then
+		qemu_pid=`cat "$resdir/qemu-pid"`
+	fi
+	kruntime=`gawk 'BEGIN { print systime() - '"$kstarttime"' }' < /dev/null`
+	if test -z "$qemu_pid" || kill -0 "$qemu_pid" > /dev/null 2>&1
+	then
+		if test -n "$TORTURE_KCONFIG_GDB_ARG"
+		then
+			:
+		elif test $kruntime -ge $seconds || test -f "$resdir/../STOP.1"
+		then
+			break;
+		fi
+		sleep 1
+	else
+		commandcompleted=1
+		if test $kruntime -lt $seconds
+		then
+			echo Completed in $kruntime vs. $seconds >> $resdir/Warnings 2>&1
+			grep "^(qemu) qemu:" $resdir/kvm-test-1-run.sh.out >> $resdir/Warnings 2>&1
+			killpid="`sed -n "s/^(qemu) qemu: terminating on signal [0-9]* from pid \([0-9]*\).*$/\1/p" $resdir/Warnings`"
+			if test -n "$killpid"
+			then
+				echo "ps -fp $killpid" >> $resdir/Warnings 2>&1
+				ps -fp $killpid >> $resdir/Warnings 2>&1
+			fi
+		else
+			echo ' ---' `date`: "Kernel done"
+		fi
+		break
+	fi
+done
+if test -z "$qemu_pid" && test -s "$resdir/qemu-pid"
+then
+	qemu_pid=`cat "$resdir/qemu-pid"`
+fi
+if test $commandcompleted -eq 0 && test -n "$qemu_pid"
+then
+	if ! test -f "$resdir/../STOP.1"
+	then
+		echo Grace period for qemu job at pid $qemu_pid `date`
+	fi
+	oldline="`tail $resdir/console.log`"
+	while :
+	do
+		if test -f "$resdir/../STOP.1"
+		then
+			echo "PID $qemu_pid killed due to run STOP.1 request `date`" >> $resdir/Warnings 2>&1
+			kill -KILL $qemu_pid
+			break
+		fi
+		kruntime=`gawk 'BEGIN { print systime() - '"$kstarttime"' }' < /dev/null`
+		if kill -0 $qemu_pid > /dev/null 2>&1
+		then
+			:
+		else
+			break
+		fi
+		must_continue=no
+		newline="`tail $resdir/console.log`"
+		if test "$newline" != "$oldline" && echo $newline | grep -q ' [0-9]\+us : '
+		then
+			must_continue=yes
+		fi
+		last_ts="`tail $resdir/console.log | grep '^\[ *[0-9]\+\.[0-9]\+]' | tail -1 | sed -e 's/^\[ *//' -e 's/\..*$//'`"
+		if test -z "$last_ts"
+		then
+			last_ts=0
+		fi
+		if test "$newline" != "$oldline" && test "$last_ts" -lt $((seconds + $TORTURE_SHUTDOWN_GRACE)) && test "$last_ts" -gt "$TORTURE_SHUTDOWN_GRACE"
+		then
+			must_continue=yes
+			if test $kruntime -ge $((seconds + $TORTURE_SHUTDOWN_GRACE))
+			then
+				echo Continuing at console.log time $last_ts \"`tail -n 1 $resdir/console.log`\" `date`
+			fi
+		fi
+		if test $must_continue = no && test $kruntime -ge $((seconds + $TORTURE_SHUTDOWN_GRACE))
+		then
+			echo "!!! PID $qemu_pid hung at $kruntime vs. $seconds seconds `date`" >> $resdir/Warnings 2>&1
+			kill -KILL $qemu_pid
+			break
+		fi
+		oldline=$newline
+		sleep 10
+	done
+elif test -z "$qemu_pid"
+then
+	echo Unknown PID, cannot kill qemu command
+fi
+
+# Tell the script that this run is done.
+rm -f $resdir/build.run
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh b/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh
new file mode 100755
index 000000000..f4c8055db
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh
@@ -0,0 +1,218 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Run a kvm-based test of the specified tree on the specified configs.
+# Fully automated run and error checking, no graphics console.
+#
+# Execute this in the source tree.  Do not run it as a background task
+# because qemu does not seem to like that much.
+#
+# Usage: kvm-test-1-run.sh config resdir seconds qemu-args boot_args_in
+#
+# qemu-args defaults to "-enable-kvm -nographic", along with arguments
+#			specifying the number of CPUs and other options
+#			generated from the underlying CPU architecture.
+# boot_args_in defaults to value returned by the per_version_boot_params
+#			shell function.
+#
+# Anything you specify for either qemu-args or boot_args_in is appended to
+# the default values.  The "-smp" value is deduced from the contents of
+# the config fragment.
+#
+# More sophisticated argument parsing is clearly needed.
+#
+# Copyright (C) IBM Corporation, 2011
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+T=${TMPDIR-/tmp}/kvm-test-1-run.sh.$$
+trap 'rm -rf $T' 0
+mkdir $T
+
+. functions.sh
+. $CONFIGFRAG/ver_functions.sh
+
+config_template=${1}
+config_dir=`echo $config_template | sed -e 's,/[^/]*$,,'`
+title=`echo $config_template | sed -e 's/^.*\///'`
+resdir=${2}
+if test -z "$resdir" -o ! -d "$resdir" -o ! -w "$resdir"
+then
+	echo "kvm-test-1-run.sh :$resdir: Not a writable directory, cannot store results into it"
+	exit 1
+fi
+echo ' ---' `date`: Starting build, PID $$
+echo ' ---' Kconfig fragment at: $config_template >> $resdir/log
+touch $resdir/ConfigFragment.input
+
+# Combine additional Kconfig options into an existing set such that
+# newer options win.  The first argument is the Kconfig source ID, the
+# second the to-be-updated file within $T, and the third and final the
+# list of additional Kconfig options.  Note that a $2.tmp file is
+# created when doing the update.
+config_override_param () {
+	if test -n "$3"
+	then
+		echo $3 | sed -e 's/^ *//' -e 's/ *$//' | tr -s " " "\012" > $T/Kconfig_args
+		echo " --- $1" >> $resdir/ConfigFragment.input
+		cat $T/Kconfig_args >> $resdir/ConfigFragment.input
+		config_override.sh $T/$2 $T/Kconfig_args > $T/$2.tmp
+		mv $T/$2.tmp $T/$2
+		# Note that "#CHECK#" is not permitted on commandline.
+	fi
+}
+
+echo > $T/KcList
+config_override_param "$config_dir/CFcommon" KcList "`cat $config_dir/CFcommon 2> /dev/null`"
+config_override_param "$config_template" KcList "`cat $config_template 2> /dev/null`"
+config_override_param "--gdb options" KcList "$TORTURE_KCONFIG_GDB_ARG"
+config_override_param "--kasan options" KcList "$TORTURE_KCONFIG_KASAN_ARG"
+config_override_param "--kcsan options" KcList "$TORTURE_KCONFIG_KCSAN_ARG"
+config_override_param "--kconfig argument" KcList "$TORTURE_KCONFIG_ARG"
+cp $T/KcList $resdir/ConfigFragment
+
+base_resdir=`echo $resdir | sed -e 's/\.[0-9]\+$//'`
+if test "$base_resdir" != "$resdir" && test -f $base_resdir/bzImage && test -f $base_resdir/vmlinux
+then
+	# Rerunning previous test, so use that test's kernel.
+	QEMU="`identify_qemu $base_resdir/vmlinux`"
+	BOOT_IMAGE="`identify_boot_image $QEMU`"
+	KERNEL=$base_resdir/${BOOT_IMAGE##*/} # use the last component of ${BOOT_IMAGE}
+	ln -s $base_resdir/Make*.out $resdir  # for kvm-recheck.sh
+	ln -s $base_resdir/.config $resdir  # for kvm-recheck.sh
+	# Arch-independent indicator
+	touch $resdir/builtkernel
+elif test "$base_resdir" != "$resdir"
+then
+	# Rerunning previous test for which build failed
+	ln -s $base_resdir/Make*.out $resdir  # for kvm-recheck.sh
+	ln -s $base_resdir/.config $resdir  # for kvm-recheck.sh
+	echo Initial build failed, not running KVM, see $resdir.
+	if test -f $resdir/build.wait
+	then
+		mv $resdir/build.wait $resdir/build.ready
+	fi
+	exit 1
+elif kvm-build.sh $T/KcList $resdir
+then
+	# Had to build a kernel for this test.
+	QEMU="`identify_qemu vmlinux`"
+	BOOT_IMAGE="`identify_boot_image $QEMU`"
+	cp vmlinux $resdir
+	cp .config $resdir
+	cp Module.symvers $resdir > /dev/null || :
+	cp System.map $resdir > /dev/null || :
+	if test -n "$BOOT_IMAGE"
+	then
+		cp $BOOT_IMAGE $resdir
+		KERNEL=$resdir/${BOOT_IMAGE##*/}
+		# Arch-independent indicator
+		touch $resdir/builtkernel
+	else
+		echo No identifiable boot image, not running KVM, see $resdir.
+		echo Do the torture scripts know about your architecture?
+	fi
+	parse-build.sh $resdir/Make.out $title
+else
+	# Build failed.
+	cp .config $resdir || :
+	echo Build failed, not running KVM, see $resdir.
+	if test -f $resdir/build.wait
+	then
+		mv $resdir/build.wait $resdir/build.ready
+	fi
+	exit 1
+fi
+if test -f $resdir/build.wait
+then
+	mv $resdir/build.wait $resdir/build.ready
+fi
+while test -f $resdir/build.ready
+do
+	sleep 1
+done
+seconds=$3
+qemu_args=$4
+boot_args_in=$5
+
+if test -z "$TORTURE_BUILDONLY"
+then
+	echo ' ---' `date`: Starting kernel
+fi
+
+# Generate -smp qemu argument.
+qemu_args="-enable-kvm -nographic $qemu_args"
+cpu_count=`configNR_CPUS.sh $resdir/ConfigFragment`
+cpu_count=`configfrag_boot_cpus "$boot_args_in" "$config_template" "$cpu_count"`
+if test "$cpu_count" -gt "$TORTURE_ALLOTED_CPUS"
+then
+	echo CPU count limited from $cpu_count to $TORTURE_ALLOTED_CPUS | tee -a $resdir/Warnings
+	cpu_count=$TORTURE_ALLOTED_CPUS
+fi
+qemu_args="`specify_qemu_cpus "$QEMU" "$qemu_args" "$cpu_count"`"
+qemu_args="`specify_qemu_net "$qemu_args"`"
+
+# Generate architecture-specific and interaction-specific qemu arguments
+qemu_args="$qemu_args `identify_qemu_args "$QEMU" "$resdir/console.log"`"
+
+# Generate qemu -append arguments
+qemu_append="`identify_qemu_append "$QEMU"`"
+
+# Pull in Kconfig-fragment boot parameters
+boot_args="`configfrag_boot_params "$boot_args_in" "$config_template"`"
+# Generate kernel-version-specific boot parameters
+boot_args="`per_version_boot_params "$boot_args" $resdir/.config $seconds`"
+if test -n "$TORTURE_BOOT_GDB_ARG"
+then
+	boot_args="$boot_args $TORTURE_BOOT_GDB_ARG"
+fi
+
+# Give bare-metal advice
+modprobe_args="`echo $boot_args | tr -s ' ' '\012' | grep "^$TORTURE_MOD\." | sed -e "s/$TORTURE_MOD\.//g"`"
+kboot_args="`echo $boot_args | tr -s ' ' '\012' | grep -v "^$TORTURE_MOD\."`"
+testid_txt="`dirname $resdir`/testid.txt"
+touch $resdir/bare-metal
+echo To run this scenario on bare metal: >> $resdir/bare-metal
+echo >> $resdir/bare-metal
+echo " 1." Set your bare-metal build tree to the state shown in this file: >> $resdir/bare-metal
+echo "   " $testid_txt >> $resdir/bare-metal
+echo " 2." Update your bare-metal build tree"'"s .config based on this file: >> $resdir/bare-metal
+echo "   " $resdir/ConfigFragment >> $resdir/bare-metal
+echo " 3." Make the bare-metal kernel"'"s build system aware of your .config updates: >> $resdir/bare-metal
+echo "   " $ 'yes "" | make oldconfig' >> $resdir/bare-metal
+echo " 4." Build your bare-metal kernel. >> $resdir/bare-metal
+echo " 5." Boot your bare-metal kernel with the following parameters: >> $resdir/bare-metal
+echo "   " $kboot_args >> $resdir/bare-metal
+echo " 6." Start the test with the following command: >> $resdir/bare-metal
+echo "   " $ modprobe $TORTURE_MOD $modprobe_args >> $resdir/bare-metal
+echo " 7." After some time, end the test with the following command: >> $resdir/bare-metal
+echo "   " $ rmmod $TORTURE_MOD >> $resdir/bare-metal
+echo " 8." Copy your bare-metal kernel"'"s .config file, overwriting this file: >> $resdir/bare-metal
+echo "   " $resdir/.config >> $resdir/bare-metal
+echo " 9." Copy the console output from just before the modprobe to just after >> $resdir/bare-metal
+echo "   " the rmmod into this file: >> $resdir/bare-metal
+echo "   " $resdir/console.log >> $resdir/bare-metal
+echo "10." Check for runtime errors using the following command: >> $resdir/bare-metal
+echo "   " $ tools/testing/selftests/rcutorture/bin/kvm-recheck.sh `dirname $resdir` >> $resdir/bare-metal
+echo >> $resdir/bare-metal
+echo Some of the above steps may be skipped if you build your bare-metal >> $resdir/bare-metal
+echo kernel here: `head -n 1 $testid_txt | sed -e 's/^Build directory: //'`  >> $resdir/bare-metal
+
+echo $QEMU $qemu_args -m $TORTURE_QEMU_MEM -kernel $KERNEL -append \"$qemu_append $boot_args\" $TORTURE_QEMU_GDB_ARG > $resdir/qemu-cmd
+echo "# TORTURE_SHUTDOWN_GRACE=$TORTURE_SHUTDOWN_GRACE" >> $resdir/qemu-cmd
+echo "# seconds=$seconds" >> $resdir/qemu-cmd
+echo "# TORTURE_KCONFIG_GDB_ARG=\"$TORTURE_KCONFIG_GDB_ARG\"" >> $resdir/qemu-cmd
+echo "# TORTURE_JITTER_START=\"$TORTURE_JITTER_START\"" >> $resdir/qemu-cmd
+echo "# TORTURE_JITTER_STOP=\"$TORTURE_JITTER_STOP\"" >> $resdir/qemu-cmd
+echo "# TORTURE_TRUST_MAKE=\"$TORTURE_TRUST_MAKE\"; export TORTURE_TRUST_MAKE" >> $resdir/qemu-cmd
+echo "# TORTURE_CPU_COUNT=$cpu_count" >> $resdir/qemu-cmd
+
+if test -n "$TORTURE_BUILDONLY"
+then
+	echo Build-only run specified, boot/test omitted.
+	touch $resdir/buildonly
+	exit 0
+fi
+
+kvm-test-1-run-qemu.sh $resdir
+parse-console.sh $resdir/console.log $title
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-transform.sh b/tools/testing/selftests/rcutorture/bin/kvm-transform.sh
new file mode 100755
index 000000000..d40b4e60a
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm-transform.sh
@@ -0,0 +1,93 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Transform a qemu-cmd file to allow reuse.
+#
+# Usage: kvm-transform.sh bzImage console.log jitter_dir [ seconds ] < qemu-cmd-in > qemu-cmd-out
+#
+#	bzImage: Kernel and initrd from the same prior kvm.sh run.
+#	console.log: File into which to place console output.
+#
+# The original qemu-cmd file is provided on standard input.
+# The transformed qemu-cmd file is on standard output.
+# The transformation assumes that the qemu command is confined to a
+# single line.  It also assumes no whitespace in filenames.
+#
+# Copyright (C) 2020 Facebook, Inc.
+#
+# Authors: Paul E. McKenney <paulmck@kernel.org>
+
+image="$1"
+if test -z "$image"
+then
+	echo Need kernel image file.
+	exit 1
+fi
+consolelog="$2"
+if test -z "$consolelog"
+then
+	echo "Need console log file name."
+	exit 1
+fi
+jitter_dir="$3"
+if test -z "$jitter_dir" || ! test -d "$jitter_dir"
+then
+	echo "Need valid jitter directory: '$jitter_dir'"
+	exit 1
+fi
+seconds="$4"
+if test -n "$seconds" && echo $seconds | grep -q '[^0-9]'
+then
+	echo "Invalid duration, should be numeric in seconds: '$seconds'"
+	exit 1
+fi
+
+awk -v image="$image" -v consolelog="$consolelog" -v jitter_dir="$jitter_dir" \
+    -v seconds="$seconds" '
+/^# seconds=/ {
+	if (seconds == "")
+		print $0;
+	else
+		print "# seconds=" seconds;
+	next;
+}
+
+/^# TORTURE_JITTER_START=/ {
+	print "# TORTURE_JITTER_START=\". jitterstart.sh " $4 " " jitter_dir " " $6 " " $7;
+	next;
+}
+
+/^# TORTURE_JITTER_STOP=/ {
+	print "# TORTURE_JITTER_STOP=\". jitterstop.sh " " " jitter_dir " " $5;
+	next;
+}
+
+/^#/ {
+	print $0;
+	next;
+}
+
+{
+	line = "";
+	for (i = 1; i <= NF; i++) {
+		if ("" seconds != "" && $i ~ /\.shutdown_secs=[0-9]*$/) {
+			sub(/[0-9]*$/, seconds, $i);
+			if (line == "")
+				line = $i;
+			else
+				line = line " " $i;
+		} else if (line == "") {
+			line = $i;
+		} else {
+			line = line " " $i;
+		}
+		if ($i == "-serial") {
+			i++;
+			line = line " file:" consolelog;
+		} else if ($i == "-kernel") {
+			i++;
+			line = line " " image;
+		}
+	}
+	print line;
+}'
diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh
new file mode 100755
index 000000000..6c734818a
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/kvm.sh
@@ -0,0 +1,659 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Run a series of tests under KVM.  By default, this series is specified
+# by the relevant CFLIST file, but can be overridden by the --configs
+# command-line argument.
+#
+# Usage: kvm.sh [ options ]
+#
+# Copyright (C) IBM Corporation, 2011
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+scriptname=$0
+args="$*"
+
+T=${TMPDIR-/tmp}/kvm.sh.$$
+trap 'rm -rf $T' 0
+mkdir $T
+
+cd `dirname $scriptname`/../../../../../
+
+# This script knows only English.
+LANG=en_US.UTF-8; export LANG
+
+dur=$((30*60))
+dryrun=""
+RCUTORTURE="`pwd`/tools/testing/selftests/rcutorture"; export RCUTORTURE
+PATH=${RCUTORTURE}/bin:$PATH; export PATH
+. functions.sh
+
+TORTURE_ALLOTED_CPUS="`identify_qemu_vcpus`"
+TORTURE_DEFCONFIG=defconfig
+TORTURE_BOOT_IMAGE=""
+TORTURE_BUILDONLY=
+TORTURE_INITRD="$RCUTORTURE/initrd"; export TORTURE_INITRD
+TORTURE_KCONFIG_ARG=""
+TORTURE_KCONFIG_GDB_ARG=""
+TORTURE_BOOT_GDB_ARG=""
+TORTURE_QEMU_GDB_ARG=""
+TORTURE_JITTER_START=""
+TORTURE_JITTER_STOP=""
+TORTURE_KCONFIG_KASAN_ARG=""
+TORTURE_KCONFIG_KCSAN_ARG=""
+TORTURE_KMAKE_ARG=""
+TORTURE_QEMU_MEM=512
+torture_qemu_mem_default=1
+TORTURE_REMOTE=
+TORTURE_SHUTDOWN_GRACE=180
+TORTURE_SUITE=rcu
+TORTURE_MOD=rcutorture
+TORTURE_TRUST_MAKE=""
+resdir=""
+configs=""
+cpus=0
+ds=`date +%Y.%m.%d-%H.%M.%S`
+jitter="-1"
+
+startdate="`date`"
+starttime="`get_starttime`"
+
+usage () {
+	echo "Usage: $scriptname optional arguments:"
+	echo "       --allcpus"
+	echo "       --bootargs kernel-boot-arguments"
+	echo "       --bootimage relative-path-to-kernel-boot-image"
+	echo "       --buildonly"
+	echo "       --configs \"config-file list w/ repeat factor (3*TINY01)\""
+	echo "       --cpus N"
+	echo "       --datestamp string"
+	echo "       --defconfig string"
+	echo "       --dryrun batches|scenarios|sched|script"
+	echo "       --duration minutes | <seconds>s | <hours>h | <days>d"
+	echo "       --gdb"
+	echo "       --help"
+	echo "       --interactive"
+	echo "       --jitter N [ maxsleep (us) [ maxspin (us) ] ]"
+	echo "       --kasan"
+	echo "       --kconfig Kconfig-options"
+	echo "       --kcsan"
+	echo "       --kmake-arg kernel-make-arguments"
+	echo "       --mac nn:nn:nn:nn:nn:nn"
+	echo "       --memory megabytes|nnnG"
+	echo "       --no-initrd"
+	echo "       --qemu-args qemu-arguments"
+	echo "       --qemu-cmd qemu-system-..."
+	echo "       --remote"
+	echo "       --results absolute-pathname"
+	echo "       --shutdown-grace seconds"
+	echo "       --torture lock|rcu|rcuscale|refscale|scf|X*"
+	echo "       --trust-make"
+	exit 1
+}
+
+while test $# -gt 0
+do
+	case "$1" in
+	--allcpus)
+		cpus=$TORTURE_ALLOTED_CPUS
+		max_cpus=$TORTURE_ALLOTED_CPUS
+		;;
+	--bootargs|--bootarg)
+		checkarg --bootargs "(list of kernel boot arguments)" "$#" "$2" '.*' '^--'
+		TORTURE_BOOTARGS="$TORTURE_BOOTARGS $2"
+		shift
+		;;
+	--bootimage)
+		checkarg --bootimage "(relative path to kernel boot image)" "$#" "$2" '[a-zA-Z0-9][a-zA-Z0-9_]*' '^--'
+		TORTURE_BOOT_IMAGE="$2"
+		shift
+		;;
+	--buildonly|--build-only)
+		TORTURE_BUILDONLY=1
+		;;
+	--configs|--config)
+		checkarg --configs "(list of config files)" "$#" "$2" '^[^/.a-z]\+$' '^--'
+		configs="$configs $2"
+		shift
+		;;
+	--cpus)
+		checkarg --cpus "(number)" "$#" "$2" '^[0-9]*$' '^--'
+		cpus=$2
+		TORTURE_ALLOTED_CPUS="$2"
+		if test -z "$TORTURE_REMOTE"
+		then
+			max_cpus="`identify_qemu_vcpus`"
+			if test "$TORTURE_ALLOTED_CPUS" -gt "$max_cpus"
+			then
+				TORTURE_ALLOTED_CPUS=$max_cpus
+			fi
+		fi
+		shift
+		;;
+	--datestamp)
+		checkarg --datestamp "(relative pathname)" "$#" "$2" '^[a-zA-Z0-9._/-]*$' '^--'
+		ds=$2
+		shift
+		;;
+	--defconfig)
+		checkarg --defconfig "defconfigtype" "$#" "$2" '^[^/][^/]*$' '^--'
+		TORTURE_DEFCONFIG=$2
+		shift
+		;;
+	--dryrun)
+		checkarg --dryrun "batches|sched|script" $# "$2" 'batches\|scenarios\|sched\|script' '^--'
+		dryrun=$2
+		shift
+		;;
+	--duration)
+		checkarg --duration "(minutes)" $# "$2" '^[0-9][0-9]*\(s\|m\|h\|d\|\)$' '^error'
+		mult=60
+		if echo "$2" | grep -q 's$'
+		then
+			mult=1
+		elif echo "$2" | grep -q 'h$'
+		then
+			mult=3600
+		elif echo "$2" | grep -q 'd$'
+		then
+			mult=86400
+		fi
+		ts=`echo $2 | sed -e 's/[smhd]$//'`
+		dur=$(($ts*mult))
+		shift
+		;;
+	--gdb)
+		TORTURE_KCONFIG_GDB_ARG="CONFIG_DEBUG_INFO_NONE=n CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y"; export TORTURE_KCONFIG_GDB_ARG
+		TORTURE_BOOT_GDB_ARG="nokaslr"; export TORTURE_BOOT_GDB_ARG
+		TORTURE_QEMU_GDB_ARG="-s -S"; export TORTURE_QEMU_GDB_ARG
+		;;
+	--help|-h)
+		usage
+		;;
+	--interactive)
+		TORTURE_QEMU_INTERACTIVE=1; export TORTURE_QEMU_INTERACTIVE
+		;;
+	--jitter)
+		checkarg --jitter "(# threads [ sleep [ spin ] ])" $# "$2" '^-\{,1\}[0-9]\+\( \+[0-9]\+\)\{,2\} *$' '^error$'
+		jitter="$2"
+		shift
+		;;
+	--kasan)
+		TORTURE_KCONFIG_KASAN_ARG="CONFIG_DEBUG_INFO_NONE=n CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y CONFIG_KASAN=y"; export TORTURE_KCONFIG_KASAN_ARG
+		if test -n "$torture_qemu_mem_default"
+		then
+			TORTURE_QEMU_MEM=2G
+		fi
+		;;
+	--kconfig|--kconfigs)
+		checkarg --kconfig "(Kconfig options)" $# "$2" '^CONFIG_[A-Z0-9_]\+=\([ynm]\|[0-9]\+\)\( CONFIG_[A-Z0-9_]\+=\([ynm]\|[0-9]\+\)\)*$' '^error$'
+		TORTURE_KCONFIG_ARG="`echo "$TORTURE_KCONFIG_ARG $2" | sed -e 's/^ *//' -e 's/ *$//'`"
+		shift
+		;;
+	--kcsan)
+		TORTURE_KCONFIG_KCSAN_ARG="CONFIG_DEBUG_INFO_NONE=n CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y CONFIG_KCSAN=y CONFIG_KCSAN_STRICT=y CONFIG_KCSAN_REPORT_ONCE_IN_MS=100000 CONFIG_KCSAN_VERBOSE=y CONFIG_DEBUG_LOCK_ALLOC=y CONFIG_PROVE_LOCKING=y"; export TORTURE_KCONFIG_KCSAN_ARG
+		;;
+	--kmake-arg|--kmake-args)
+		checkarg --kmake-arg "(kernel make arguments)" $# "$2" '.*' '^error$'
+		TORTURE_KMAKE_ARG="`echo "$TORTURE_KMAKE_ARG $2" | sed -e 's/^ *//' -e 's/ *$//'`"
+		shift
+		;;
+	--mac)
+		checkarg --mac "(MAC address)" $# "$2" '^\([0-9a-fA-F]\{2\}:\)\{5\}[0-9a-fA-F]\{2\}$' error
+		TORTURE_QEMU_MAC=$2
+		shift
+		;;
+	--memory)
+		checkarg --memory "(memory size)" $# "$2" '^[0-9]\+[MG]\?$' error
+		TORTURE_QEMU_MEM=$2
+		torture_qemu_mem_default=
+		shift
+		;;
+	--no-initrd)
+		TORTURE_INITRD=""; export TORTURE_INITRD
+		;;
+	--qemu-args|--qemu-arg)
+		checkarg --qemu-args "(qemu arguments)" $# "$2" '^-' '^error'
+		TORTURE_QEMU_ARG="`echo "$TORTURE_QEMU_ARG $2" | sed -e 's/^ *//' -e 's/ *$//'`"
+		shift
+		;;
+	--qemu-cmd)
+		checkarg --qemu-cmd "(qemu-system-...)" $# "$2" 'qemu-system-' '^--'
+		TORTURE_QEMU_CMD="$2"
+		shift
+		;;
+	--remote)
+		TORTURE_REMOTE=1
+		;;
+	--results)
+		checkarg --results "(absolute pathname)" "$#" "$2" '^/' '^error'
+		resdir=$2
+		shift
+		;;
+	--shutdown-grace)
+		checkarg --shutdown-grace "(seconds)" "$#" "$2" '^[0-9]*$' '^error'
+		TORTURE_SHUTDOWN_GRACE=$2
+		shift
+		;;
+	--torture)
+		checkarg --torture "(suite name)" "$#" "$2" '^\(lock\|rcu\|rcuscale\|refscale\|scf\|X.*\)$' '^--'
+		TORTURE_SUITE=$2
+		TORTURE_MOD="`echo $TORTURE_SUITE | sed -e 's/^\(lock\|rcu\|scf\)$/\1torture/'`"
+		shift
+		if test "$TORTURE_SUITE" = rcuscale || test "$TORTURE_SUITE" = refscale
+		then
+			# If you really want jitter for refscale or
+			# rcuscale, specify it after specifying the rcuscale
+			# or the refscale.  (But why jitter in these cases?)
+			jitter=0
+		fi
+		;;
+	--trust-make)
+		TORTURE_TRUST_MAKE="y"
+		;;
+	*)
+		echo Unknown argument $1
+		usage
+		;;
+	esac
+	shift
+done
+
+if test -n "$dryrun" || test -z "$TORTURE_INITRD" || tools/testing/selftests/rcutorture/bin/mkinitrd.sh
+then
+	:
+else
+	echo No initrd and unable to create one, aborting test >&2
+	exit 1
+fi
+
+CONFIGFRAG=${RCUTORTURE}/configs/${TORTURE_SUITE}; export CONFIGFRAG
+
+defaultconfigs="`tr '\012' ' ' < $CONFIGFRAG/CFLIST`"
+if test -z "$configs"
+then
+	configs=$defaultconfigs
+fi
+
+if test -z "$resdir"
+then
+	resdir=$RCUTORTURE/res
+fi
+
+# Create a file of test-name/#cpus pairs, sorted by decreasing #cpus.
+configs_derep=
+for CF in $configs
+do
+	case $CF in
+	[0-9]\**|[0-9][0-9]\**|[0-9][0-9][0-9]\**|[0-9][0-9][0-9][0-9]\**)
+		config_reps=`echo $CF | sed -e 's/\*.*$//'`
+		CF1=`echo $CF | sed -e 's/^[^*]*\*//'`
+		;;
+	*)
+		config_reps=1
+		CF1=$CF
+		;;
+	esac
+	for ((cur_rep=0;cur_rep<$config_reps;cur_rep++))
+	do
+		configs_derep="$configs_derep $CF1"
+	done
+done
+touch $T/cfgcpu
+configs_derep="`echo $configs_derep | sed -e "s/\<CFLIST\>/$defaultconfigs/g"`"
+if test -n "$TORTURE_KCONFIG_GDB_ARG"
+then
+	if test "`echo $configs_derep | wc -w`" -gt 1
+	then
+		echo "The --config list is: $configs_derep."
+		echo "Only one --config permitted with --gdb, terminating."
+		exit 1
+	fi
+fi
+echo 'BEGIN {' > $T/cfgcpu.awk
+for CF1 in `echo $configs_derep | tr -s ' ' '\012' | sort -u`
+do
+	if test -f "$CONFIGFRAG/$CF1"
+	then
+		if echo "$TORTURE_KCONFIG_ARG" | grep -q '\<CONFIG_NR_CPUS='
+		then
+			echo "$TORTURE_KCONFIG_ARG" | tr -s ' ' | tr ' ' '\012' > $T/KCONFIG_ARG
+			cpu_count=`configNR_CPUS.sh $T/KCONFIG_ARG`
+		else
+			cpu_count=`configNR_CPUS.sh $CONFIGFRAG/$CF1`
+		fi
+		cpu_count=`configfrag_boot_cpus "$TORTURE_BOOTARGS" "$CONFIGFRAG/$CF1" "$cpu_count"`
+		cpu_count=`configfrag_boot_maxcpus "$TORTURE_BOOTARGS" "$CONFIGFRAG/$CF1" "$cpu_count"`
+		echo 'scenariocpu["'"$CF1"'"] = '"$cpu_count"';' >> $T/cfgcpu.awk
+	else
+		echo "The --configs file $CF1 does not exist, terminating."
+		exit 1
+	fi
+done
+cat << '___EOF___' >> $T/cfgcpu.awk
+}
+{
+	for (i = 1; i <= NF; i++)
+		print $i, scenariocpu[$i];
+}
+___EOF___
+echo $configs_derep | awk -f $T/cfgcpu.awk > $T/cfgcpu
+sort -k2nr $T/cfgcpu -T="$T" > $T/cfgcpu.sort
+
+# Use a greedy bin-packing algorithm, sorting the list accordingly.
+awk < $T/cfgcpu.sort > $T/cfgcpu.pack -v ncpus=$cpus '
+BEGIN {
+	njobs = 0;
+}
+
+{
+	# Read file of tests and corresponding required numbers of CPUs.
+	cf[njobs] = $1;
+	cpus[njobs] = $2;
+	njobs++;
+}
+
+END {
+	batch = 0;
+	nc = -1;
+
+	# Each pass through the following loop creates on test batch that
+	# can be executed concurrently given ncpus.  Note that a given test
+	# that requires more than the available CPUs will run in its own
+	# batch.  Such tests just have to make do with what is available.
+	while (nc != ncpus) {
+		batch++;
+		nc = ncpus;
+
+		# Each pass through the following loop considers one
+		# test for inclusion in the current batch.
+		for (i = 0; i < njobs; i++) {
+			if (done[i])
+				continue; # Already part of a batch.
+			if (nc >= cpus[i] || nc == ncpus) {
+
+				# This test fits into the current batch.
+				done[i] = batch;
+				nc -= cpus[i];
+				if (nc <= 0)
+					break; # Too-big test in its own batch.
+			}
+		}
+	}
+
+	# Dump out the tests in batch order.
+	for (b = 1; b <= batch; b++)
+		for (i = 0; i < njobs; i++)
+			if (done[i] == b)
+				print cf[i], cpus[i];
+}'
+
+# Generate a script to execute the tests in appropriate batches.
+cat << ___EOF___ > $T/script
+CONFIGFRAG="$CONFIGFRAG"; export CONFIGFRAG
+RCUTORTURE="$RCUTORTURE"; export RCUTORTURE
+PATH="$PATH"; export PATH
+TORTURE_ALLOTED_CPUS="$TORTURE_ALLOTED_CPUS"; export TORTURE_ALLOTED_CPUS
+TORTURE_BOOT_IMAGE="$TORTURE_BOOT_IMAGE"; export TORTURE_BOOT_IMAGE
+TORTURE_BUILDONLY="$TORTURE_BUILDONLY"; export TORTURE_BUILDONLY
+TORTURE_DEFCONFIG="$TORTURE_DEFCONFIG"; export TORTURE_DEFCONFIG
+TORTURE_INITRD="$TORTURE_INITRD"; export TORTURE_INITRD
+TORTURE_KCONFIG_ARG="$TORTURE_KCONFIG_ARG"; export TORTURE_KCONFIG_ARG
+TORTURE_KCONFIG_GDB_ARG="$TORTURE_KCONFIG_GDB_ARG"; export TORTURE_KCONFIG_GDB_ARG
+TORTURE_BOOT_GDB_ARG="$TORTURE_BOOT_GDB_ARG"; export TORTURE_BOOT_GDB_ARG
+TORTURE_QEMU_GDB_ARG="$TORTURE_QEMU_GDB_ARG"; export TORTURE_QEMU_GDB_ARG
+TORTURE_KCONFIG_KASAN_ARG="$TORTURE_KCONFIG_KASAN_ARG"; export TORTURE_KCONFIG_KASAN_ARG
+TORTURE_KCONFIG_KCSAN_ARG="$TORTURE_KCONFIG_KCSAN_ARG"; export TORTURE_KCONFIG_KCSAN_ARG
+TORTURE_KMAKE_ARG="$TORTURE_KMAKE_ARG"; export TORTURE_KMAKE_ARG
+TORTURE_MOD="$TORTURE_MOD"; export TORTURE_MOD
+TORTURE_QEMU_CMD="$TORTURE_QEMU_CMD"; export TORTURE_QEMU_CMD
+TORTURE_QEMU_INTERACTIVE="$TORTURE_QEMU_INTERACTIVE"; export TORTURE_QEMU_INTERACTIVE
+TORTURE_QEMU_MAC="$TORTURE_QEMU_MAC"; export TORTURE_QEMU_MAC
+TORTURE_QEMU_MEM="$TORTURE_QEMU_MEM"; export TORTURE_QEMU_MEM
+TORTURE_SHUTDOWN_GRACE="$TORTURE_SHUTDOWN_GRACE"; export TORTURE_SHUTDOWN_GRACE
+TORTURE_SUITE="$TORTURE_SUITE"; export TORTURE_SUITE
+TORTURE_TRUST_MAKE="$TORTURE_TRUST_MAKE"; export TORTURE_TRUST_MAKE
+if ! test -e $resdir
+then
+	mkdir -p "$resdir" || :
+fi
+mkdir -p $resdir/$ds
+TORTURE_RESDIR="$resdir/$ds"; export TORTURE_RESDIR
+TORTURE_STOPFILE="$resdir/$ds/STOP.1"; export TORTURE_STOPFILE
+echo Results directory: $resdir/$ds
+echo $scriptname $args
+touch $resdir/$ds/log
+echo $scriptname $args >> $resdir/$ds/log
+echo ${TORTURE_SUITE} > $resdir/$ds/torture_suite
+echo Build directory: `pwd` > $resdir/$ds/testid.txt
+if test -d .git
+then
+	echo Current commit: `git rev-parse HEAD` >> $resdir/$ds/testid.txt
+	echo >> $resdir/$ds/testid.txt
+	echo ' ---' Output of "'"git status"'": >> $resdir/$ds/testid.txt
+	git status >> $resdir/$ds/testid.txt
+	echo >> $resdir/$ds/testid.txt
+	echo >> $resdir/$ds/testid.txt
+	echo ' ---' Output of "'"git diff HEAD"'": >> $resdir/$ds/testid.txt
+	git diff HEAD >> $resdir/$ds/testid.txt
+fi
+___EOF___
+kvm-assign-cpus.sh /sys/devices/system/node > $T/cpuarray.awk
+kvm-get-cpus-script.sh $T/cpuarray.awk $T/dumpbatches.awk
+cat << '___EOF___' >> $T/dumpbatches.awk
+BEGIN {
+	i = 0;
+}
+
+{
+	cf[i] = $1;
+	cpus[i] = $2;
+	i++;
+}
+
+# Dump out the scripting required to run one test batch.
+function dump(first, pastlast, batchnum,  affinitylist)
+{
+	print "echo ----Start batch " batchnum ": `date` | tee -a " rd "log";
+	print "needqemurun="
+	jn=1
+	njitter = 0;
+	split(jitter, ja);
+	if (ja[1] == -1 && ncpus == 0)
+		njitter = 1;
+	else if (ja[1] == -1)
+		njitter = ncpus;
+	else
+		njitter = ja[1];
+	print "TORTURE_JITTER_START=\". jitterstart.sh " njitter " " rd " " dur " " ja[2] " " ja[3] "\"; export TORTURE_JITTER_START";
+	print "TORTURE_JITTER_STOP=\". jitterstop.sh " rd " \"; export TORTURE_JITTER_STOP"
+	for (j = first; j < pastlast; j++) {
+		cpusr[jn] = cpus[j];
+		if (cfrep[cf[j]] == "") {
+			cfr[jn] = cf[j];
+			cfrep[cf[j]] = 1;
+		} else {
+			cfrep[cf[j]]++;
+			cfr[jn] = cf[j] "." cfrep[cf[j]];
+		}
+		builddir=rd cfr[jn] "/build";
+		if (cpusr[jn] > ncpus && ncpus != 0)
+			ovf = "-ovf";
+		else
+			ovf = "";
+		print "echo ", cfr[jn], cpusr[jn] ovf ": Starting build. `date` | tee -a " rd "log";
+		print "mkdir " rd cfr[jn] " || :";
+		print "touch " builddir ".wait";
+		affinitylist = "";
+		if (gotcpus()) {
+			affinitylist = nextcpus(cpusr[jn]);
+		}
+		if (affinitylist ~ /^[0-9,-][0-9,-]*$/)
+			print "export TORTURE_AFFINITY=" affinitylist;
+		else
+			print "export TORTURE_AFFINITY=";
+		print "kvm-test-1-run.sh " CONFIGDIR cf[j], rd cfr[jn], dur " \"" TORTURE_QEMU_ARG "\" \"" TORTURE_BOOTARGS "\" > " rd cfr[jn]  "/kvm-test-1-run.sh.out 2>&1 &"
+		print "echo ", cfr[jn], cpusr[jn] ovf ": Waiting for build to complete. `date` | tee -a " rd "log";
+		print "while test -f " builddir ".wait"
+		print "do"
+		print "\tsleep 1"
+		print "done"
+		print "echo ", cfr[jn], cpusr[jn] ovf ": Build complete. `date` | tee -a " rd "log";
+		jn++;
+	}
+	print "runfiles="
+	for (j = 1; j < jn; j++) {
+		builddir=rd cfr[j] "/build";
+		if (TORTURE_BUILDONLY)
+			print "rm -f " builddir ".ready"
+		else
+			print "mv " builddir ".ready " builddir ".run"
+			print "runfiles=\"$runfiles " builddir ".run\""
+		fi
+		print "if test -f \"" rd cfr[j] "/builtkernel\""
+		print "then"
+		print "\techo ----", cfr[j], cpusr[j] ovf ": Kernel present. `date` | tee -a " rd "log";
+		print "\tneedqemurun=1"
+		print "fi"
+	}
+	if (TORTURE_BUILDONLY && njitter != 0) {
+		njitter = 0;
+		print "echo Build-only run, so suppressing jitter | tee -a " rd "log"
+	}
+	if (TORTURE_BUILDONLY) {
+		print "needqemurun="
+	}
+	print "if test -n \"$needqemurun\""
+	print "then"
+	print "\techo ---- Starting kernels. `date` | tee -a " rd "log";
+	print "\t$TORTURE_JITTER_START";
+	print "\twhile ls $runfiles > /dev/null 2>&1"
+	print "\tdo"
+	print "\t\t:"
+	print "\tdone"
+	print "\t$TORTURE_JITTER_STOP";
+	print "\techo ---- All kernel runs complete. `date` | tee -a " rd "log";
+	print "else"
+	print "\twait"
+	print "\techo ---- No kernel runs. `date` | tee -a " rd "log";
+	print "fi"
+	for (j = 1; j < jn; j++) {
+		print "echo ----", cfr[j], cpusr[j] ovf ": Build/run results: | tee -a " rd "log";
+		print "cat " rd cfr[j]  "/kvm-test-1-run.sh.out | tee -a " rd "log";
+	}
+}
+
+END {
+	njobs = i;
+	nc = ncpus;
+	first = 0;
+	batchnum = 1;
+
+	# Each pass through the following loop considers one test.
+	for (i = 0; i < njobs; i++) {
+		if (ncpus == 0) {
+			# Sequential test specified, each test its own batch.
+			dump(i, i + 1, batchnum);
+			first = i;
+			batchnum++;
+		} else if (nc < cpus[i] && i != 0) {
+			# Out of CPUs, dump out a batch.
+			dump(first, i, batchnum);
+			first = i;
+			nc = ncpus;
+			batchnum++;
+		}
+		# Account for the CPUs needed by the current test.
+		nc -= cpus[i];
+	}
+	# Dump the last batch.
+	if (ncpus != 0)
+		dump(first, i, batchnum);
+}
+___EOF___
+awk < $T/cfgcpu.pack \
+	-v TORTURE_BUILDONLY="$TORTURE_BUILDONLY" \
+	-v CONFIGDIR="$CONFIGFRAG/" \
+	-v RCUTORTURE="$RCUTORTURE" \
+	-v ncpus=$cpus \
+	-v jitter="$jitter" \
+	-v rd=$resdir/$ds/ \
+	-v dur=$dur \
+	-v TORTURE_QEMU_ARG="$TORTURE_QEMU_ARG" \
+	-v TORTURE_BOOTARGS="$TORTURE_BOOTARGS" \
+	-f $T/dumpbatches.awk >> $T/script
+echo kvm-end-run-stats.sh "$resdir/$ds" "$starttime" >> $T/script
+
+# Extract the tests and their batches from the script.
+egrep 'Start batch|Starting build\.' $T/script | grep -v ">>" |
+	sed -e 's/:.*$//' -e 's/^echo //' -e 's/-ovf//' |
+	awk '
+	/^----Start/ {
+		batchno = $3;
+		next;
+	}
+	{
+		print batchno, $1, $2
+	}' > $T/batches
+
+# As above, but one line per batch.
+grep -v '^#' $T/batches | awk '
+BEGIN {
+	oldbatch = 1;
+}
+
+{
+	if (oldbatch != $1) {
+		print ++n ". " curbatch;
+		curbatch = "";
+		oldbatch = $1;
+	}
+	curbatch = curbatch " " $2;
+}
+
+END {
+	print ++n ". " curbatch;
+}' > $T/scenarios
+
+if test "$dryrun" = script
+then
+	cat $T/script
+	exit 0
+elif test "$dryrun" = sched
+then
+	# Extract the test run schedule from the script.
+	egrep 'Start batch|Starting build\.' $T/script | grep -v ">>" |
+		sed -e 's/:.*$//' -e 's/^echo //'
+	nbuilds="`grep 'Starting build\.' $T/script |
+		  grep -v ">>" | sed -e 's/:.*$//' -e 's/^echo //' |
+		  awk '{ print $1 }' | grep -v '\.' | wc -l`"
+	echo Total number of builds: $nbuilds
+	nbatches="`grep 'Start batch' $T/script | grep -v ">>" | wc -l`"
+	echo Total number of batches: $nbatches
+	exit 0
+elif test "$dryrun" = batches
+then
+	cat $T/batches
+	exit 0
+elif test "$dryrun" = scenarios
+then
+	cat $T/scenarios
+	exit 0
+else
+	# Not a dryrun.  Record the batches and the number of CPUs, then run the script.
+	bash $T/script
+	ret=$?
+	cp $T/batches $resdir/$ds/batches
+	cp $T/scenarios $resdir/$ds/scenarios
+	echo '#' cpus=$cpus >> $resdir/$ds/batches
+	exit $ret
+fi
+
+# Tracing: trace_event=rcu:rcu_grace_period,rcu:rcu_future_grace_period,rcu:rcu_grace_period_init,rcu:rcu_nocb_wake,rcu:rcu_preempt_task,rcu:rcu_unlock_preempted_task,rcu:rcu_quiescent_state_report,rcu:rcu_fqs,rcu:rcu_callback,rcu:rcu_kfree_callback,rcu:rcu_batch_start,rcu:rcu_invoke_callback,rcu:rcu_invoke_kfree_callback,rcu:rcu_batch_end,rcu:rcu_torture_read,rcu:rcu_barrier
+# Function-graph tracing: ftrace=function_graph ftrace_graph_filter=sched_setaffinity,migration_cpu_stop
+# Also --kconfig "CONFIG_FUNCTION_TRACER=y CONFIG_FUNCTION_GRAPH_TRACER=y"
+# Control buffer size: --bootargs trace_buf_size=3k
+# Get trace-buffer dumps on all oopses: --bootargs ftrace_dump_on_oops
+# Ditto, but dump only the oopsing CPU: --bootargs ftrace_dump_on_oops=orig_cpu
+# Heavy-handed way to also dump on warnings: --bootargs panic_on_warn
diff --git a/tools/testing/selftests/rcutorture/bin/mkinitrd.sh b/tools/testing/selftests/rcutorture/bin/mkinitrd.sh
new file mode 100755
index 000000000..70d62fd0d
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/mkinitrd.sh
@@ -0,0 +1,81 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Create an initrd directory if one does not already exist.
+#
+# Copyright (C) IBM Corporation, 2013
+#
+# Author: Connor Shu <Connor.Shu@ibm.com>
+
+D=tools/testing/selftests/rcutorture
+
+# Prerequisite checks
+[ -z "$D" ] && echo >&2 "No argument supplied" && exit 1
+if [ ! -d "$D" ]; then
+    echo >&2 "$D does not exist: Malformed kernel source tree?"
+    exit 1
+fi
+if [ -s "$D/initrd/init" ]; then
+    echo "$D/initrd/init already exists, no need to create it"
+    exit 0
+fi
+
+# Create a C-language initrd/init infinite-loop program and statically
+# link it.  This results in a very small initrd.
+echo "Creating a statically linked C-language initrd"
+cd $D
+mkdir -p initrd
+cd initrd
+cat > init.c << '___EOF___'
+#ifndef NOLIBC
+#include <unistd.h>
+#include <sys/time.h>
+#endif
+
+volatile unsigned long delaycount;
+
+int main(int argc, int argv[])
+{
+	int i;
+	struct timeval tv;
+	struct timeval tvb;
+
+	for (;;) {
+		sleep(1);
+		/* Need some userspace time. */
+		if (gettimeofday(&tvb, NULL))
+			continue;
+		do {
+			for (i = 0; i < 1000 * 100; i++)
+				delaycount = i * i;
+			if (gettimeofday(&tv, NULL))
+				break;
+			tv.tv_sec -= tvb.tv_sec;
+			if (tv.tv_sec > 1)
+				break;
+			tv.tv_usec += tv.tv_sec * 1000 * 1000;
+			tv.tv_usec -= tvb.tv_usec;
+		} while (tv.tv_usec < 1000);
+	}
+	return 0;
+}
+___EOF___
+
+# build using nolibc on supported archs (smaller executable) and fall
+# back to regular glibc on other ones.
+if echo -e "#if __x86_64__||__i386__||__i486__||__i586__||__i686__" \
+           "||__ARM_EABI__||__aarch64__\nyes\n#endif" \
+   | ${CROSS_COMPILE}gcc -E -nostdlib -xc - \
+   | grep -q '^yes'; then
+	# architecture supported by nolibc
+        ${CROSS_COMPILE}gcc -fno-asynchronous-unwind-tables -fno-ident \
+		-nostdlib -include ../../../../include/nolibc/nolibc.h \
+		-s -static -Os -o init init.c -lgcc
+else
+	${CROSS_COMPILE}gcc -s -static -Os -o init init.c
+fi
+
+rm init.c
+echo "Done creating a statically linked C-language initrd"
+
+exit 0
diff --git a/tools/testing/selftests/rcutorture/bin/parse-build.sh b/tools/testing/selftests/rcutorture/bin/parse-build.sh
new file mode 100755
index 000000000..2dbfca358
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/parse-build.sh
@@ -0,0 +1,50 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Check the build output from an rcutorture run for goodness.
+# The "file" is a pathname on the local system, and "title" is
+# a text string for error-message purposes.
+#
+# The file must contain kernel build output.
+#
+# Usage: parse-build.sh file title
+#
+# Copyright (C) IBM Corporation, 2011
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+F=$1
+title=$2
+T=${TMPDIR-/tmp}/parse-build.sh.$$
+trap 'rm -rf $T' 0
+mkdir $T
+
+. functions.sh
+
+if grep -q CC < $F || test -n "$TORTURE_TRUST_MAKE" || grep -qe --trust-make < `dirname $F`/../log
+then
+	:
+else
+	print_bug $title no build
+	exit 1
+fi
+
+if grep -q "error:" < $F
+then
+	print_bug $title build errors:
+	grep "error:" < $F
+	exit 2
+fi
+
+grep warning: < $F > $T/warnings
+grep "include/linux/*rcu*\.h:" $T/warnings > $T/hwarnings
+grep "kernel/rcu/[^/]*:" $T/warnings > $T/cwarnings
+grep "^ld: .*undefined reference to" $T/warnings | head -1 > $T/ldwarnings
+cat $T/hwarnings $T/cwarnings $T/ldwarnings > $T/rcuwarnings
+if test -s $T/rcuwarnings
+then
+	print_warning $title build errors:
+	cat $T/rcuwarnings
+	exit 2
+fi
+exit 0
diff --git a/tools/testing/selftests/rcutorture/bin/parse-console.sh b/tools/testing/selftests/rcutorture/bin/parse-console.sh
new file mode 100755
index 000000000..822eb037a
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/parse-console.sh
@@ -0,0 +1,184 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Check the console output from an rcutorture run for oopses.
+# The "file" is a pathname on the local system, and "title" is
+# a text string for error-message purposes.
+#
+# Usage: parse-console.sh file title
+#
+# Copyright (C) IBM Corporation, 2011
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+T=${TMPDIR-/tmp}/parse-console.sh.$$
+file="$1"
+title="$2"
+
+trap 'rm -f $T.seq $T.diags' 0
+
+. functions.sh
+
+# Check for presence and readability of console output file
+if test -f "$file" -a -r "$file"
+then
+	:
+else
+	echo $title unreadable console output file: $file
+	exit 1
+fi
+if grep -Pq '\x00' < $file
+then
+	print_warning Console output contains nul bytes, old qemu still running?
+fi
+cat /dev/null > $file.diags
+
+# Check for proper termination, except for rcuscale and refscale.
+if test "$TORTURE_SUITE" != rcuscale && test "$TORTURE_SUITE" != refscale
+then
+	# check for abject failure
+
+	if grep -q FAILURE $file || grep -q -e '-torture.*!!!' $file
+	then
+		nerrs=`grep --binary-files=text '!!!' $file |
+		tail -1 |
+		awk '
+		{
+			normalexit = 1;
+			for (i=NF-8;i<=NF;i++) {
+				if (i <= 0 || i !~ /^[0-9]*$/) {
+					bangstring = $0;
+					gsub(/^\[[^]]*] /, "", bangstring);
+					print bangstring;
+					normalexit = 0;
+					exit 0;
+				}
+				sum+=$i;
+			}
+		}
+		END {
+			if (normalexit)
+				print sum " instances"
+		}'`
+		print_bug $title FAILURE, $nerrs
+		exit
+	fi
+
+	grep --binary-files=text 'torture:.*ver:' $file |
+	egrep --binary-files=text -v '\(null\)|rtc: 000000000* ' |
+	sed -e 's/^(initramfs)[^]]*] //' -e 's/^\[[^]]*] //' |
+	sed -e 's/^.*ver: //' |
+	awk '
+	BEGIN	{
+		ver = 0;
+		badseq = 0;
+		}
+
+		{
+		if (!badseq && ($1 + 0 != $1 || $1 <= ver)) {
+			badseqno1 = ver;
+			badseqno2 = $1;
+			badseqnr = NR;
+			badseq = 1;
+		}
+		ver = $1
+		}
+
+	END	{
+		if (badseq) {
+			if (badseqno1 == badseqno2 && badseqno2 == ver)
+				print "GP HANG at " ver " torture stat " badseqnr;
+			else
+				print "BAD SEQ " badseqno1 ":" badseqno2 " last:" ver " version " badseqnr;
+		}
+		}' > $T.seq
+
+	if grep -q SUCCESS $file
+	then
+		if test -s $T.seq
+		then
+			print_warning $title `cat $T.seq`
+			echo "   " $file
+			exit 2
+		fi
+	else
+		if grep -q "_HOTPLUG:" $file
+		then
+			print_warning HOTPLUG FAILURES $title `cat $T.seq`
+			echo "   " $file
+			exit 3
+		fi
+		echo $title no success message, `grep --binary-files=text 'ver:' $file | wc -l` successful version messages
+		if test -s $T.seq
+		then
+			print_warning $title `cat $T.seq`
+		fi
+		exit 2
+	fi
+fi | tee -a $file.diags
+
+console-badness.sh < $file > $T.diags
+if test -s $T.diags
+then
+	print_warning "Assertion failure in $file $title"
+	# cat $T.diags
+	summary=""
+	n_badness=`grep -c Badness $file`
+	if test "$n_badness" -ne 0
+	then
+		summary="$summary  Badness: $n_badness"
+	fi
+	n_warn=`grep -v 'Warning: unable to open an initial console' $file | grep -v 'Warning: Failed to add ttynull console. No stdin, stdout, and stderr for the init process' | egrep -c 'WARNING:|Warn'`
+	if test "$n_warn" -ne 0
+	then
+		summary="$summary  Warnings: $n_warn"
+	fi
+	n_bugs=`egrep -c '\bBUG|Oops:' $file`
+	if test "$n_bugs" -ne 0
+	then
+		summary="$summary  Bugs: $n_bugs"
+	fi
+	n_kcsan=`egrep -c 'BUG: KCSAN: ' $file`
+	if test "$n_kcsan" -ne 0
+	then
+		if test "$n_bugs" = "$n_kcsan"
+		then
+			summary="$summary (all bugs kcsan)"
+		else
+			summary="$summary  KCSAN: $n_kcsan"
+		fi
+	fi
+	n_calltrace=`grep -c 'Call Trace:' $file`
+	if test "$n_calltrace" -ne 0
+	then
+		summary="$summary  Call Traces: $n_calltrace"
+	fi
+	n_lockdep=`grep -c =========== $file`
+	if test "$n_badness" -ne 0
+	then
+		summary="$summary  lockdep: $n_badness"
+	fi
+	n_stalls=`egrep -c 'detected stalls on CPUs/tasks:|self-detected stall on CPU|Stall ended before state dump start|\?\?\? Writer stall state' $file`
+	if test "$n_stalls" -ne 0
+	then
+		summary="$summary  Stalls: $n_stalls"
+	fi
+	n_starves=`grep -c 'rcu_.*kthread starved for' $file`
+	if test "$n_starves" -ne 0
+	then
+		summary="$summary  Starves: $n_starves"
+	fi
+	print_warning Summary: $summary
+	cat $T.diags >> $file.diags
+fi
+for i in $file.*.diags
+do
+	if test -f "$i"
+	then
+		cat $i >> $file.diags
+	fi
+done
+if ! test -s $file.diags
+then
+	rm -f $file.diags
+fi
diff --git a/tools/testing/selftests/rcutorture/bin/torture.sh b/tools/testing/selftests/rcutorture/bin/torture.sh
new file mode 100755
index 000000000..d477618e7
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/bin/torture.sh
@@ -0,0 +1,503 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Run a series of torture tests, intended for overnight or
+# longer timeframes, and also for large systems.
+#
+# Usage: torture.sh [ options ]
+#
+# Copyright (C) 2020 Facebook, Inc.
+#
+# Authors: Paul E. McKenney <paulmck@kernel.org>
+
+scriptname=$0
+args="$*"
+
+RCUTORTURE="`pwd`/tools/testing/selftests/rcutorture"; export RCUTORTURE
+PATH=${RCUTORTURE}/bin:$PATH; export PATH
+. functions.sh
+
+TORTURE_ALLOTED_CPUS="`identify_qemu_vcpus`"
+MAKE_ALLOTED_CPUS=$((TORTURE_ALLOTED_CPUS*2))
+HALF_ALLOTED_CPUS=$((TORTURE_ALLOTED_CPUS/2))
+if test "$HALF_ALLOTED_CPUS" -lt 1
+then
+	HALF_ALLOTED_CPUS=1
+fi
+VERBOSE_BATCH_CPUS=$((TORTURE_ALLOTED_CPUS/16))
+if test "$VERBOSE_BATCH_CPUS" -lt 2
+then
+	VERBOSE_BATCH_CPUS=0
+fi
+
+# Configurations/scenarios.
+configs_rcutorture=
+configs_locktorture=
+configs_scftorture=
+kcsan_kmake_args=
+
+# Default compression, duration, and apportionment.
+compress_concurrency="`identify_qemu_vcpus`"
+duration_base=10
+duration_rcutorture_frac=7
+duration_locktorture_frac=1
+duration_scftorture_frac=2
+
+# "yes" or "no" parameters
+do_allmodconfig=yes
+do_rcutorture=yes
+do_locktorture=yes
+do_scftorture=yes
+do_rcuscale=yes
+do_refscale=yes
+do_kvfree=yes
+do_kasan=yes
+do_kcsan=no
+do_clocksourcewd=yes
+do_rt=yes
+
+# doyesno - Helper function for yes/no arguments
+function doyesno () {
+	if test "$1" = "$2"
+	then
+		echo yes
+	else
+		echo no
+	fi
+}
+
+usage () {
+	echo "Usage: $scriptname optional arguments:"
+	echo "       --compress-concurrency concurrency"
+	echo "       --configs-rcutorture \"config-file list w/ repeat factor (3*TINY01)\""
+	echo "       --configs-locktorture \"config-file list w/ repeat factor (10*LOCK01)\""
+	echo "       --configs-scftorture \"config-file list w/ repeat factor (2*CFLIST)\""
+	echo "       --do-all"
+	echo "       --do-allmodconfig / --do-no-allmodconfig"
+	echo "       --do-clocksourcewd / --do-no-clocksourcewd"
+	echo "       --do-kasan / --do-no-kasan"
+	echo "       --do-kcsan / --do-no-kcsan"
+	echo "       --do-kvfree / --do-no-kvfree"
+	echo "       --do-locktorture / --do-no-locktorture"
+	echo "       --do-none"
+	echo "       --do-rcuscale / --do-no-rcuscale"
+	echo "       --do-rcutorture / --do-no-rcutorture"
+	echo "       --do-refscale / --do-no-refscale"
+	echo "       --do-rt / --do-no-rt"
+	echo "       --do-scftorture / --do-no-scftorture"
+	echo "       --duration [ <minutes> | <hours>h | <days>d ]"
+	echo "       --kcsan-kmake-arg kernel-make-arguments"
+	exit 1
+}
+
+while test $# -gt 0
+do
+	case "$1" in
+	--compress-concurrency)
+		checkarg --compress-concurrency "(concurrency level)" $# "$2" '^[0-9][0-9]*$' '^error'
+		compress_concurrency=$2
+		shift
+		;;
+	--config-rcutorture|--configs-rcutorture)
+		checkarg --configs-rcutorture "(list of config files)" "$#" "$2" '^[^/]\+$' '^--'
+		configs_rcutorture="$configs_rcutorture $2"
+		shift
+		;;
+	--config-locktorture|--configs-locktorture)
+		checkarg --configs-locktorture "(list of config files)" "$#" "$2" '^[^/]\+$' '^--'
+		configs_locktorture="$configs_locktorture $2"
+		shift
+		;;
+	--config-scftorture|--configs-scftorture)
+		checkarg --configs-scftorture "(list of config files)" "$#" "$2" '^[^/]\+$' '^--'
+		configs_scftorture="$configs_scftorture $2"
+		shift
+		;;
+	--do-all|--doall)
+		do_allmodconfig=yes
+		do_rcutorture=yes
+		do_locktorture=yes
+		do_scftorture=yes
+		do_rcuscale=yes
+		do_refscale=yes
+		do_rt=yes
+		do_kvfree=yes
+		do_kasan=yes
+		do_kcsan=yes
+		do_clocksourcewd=yes
+		;;
+	--do-allmodconfig|--do-no-allmodconfig)
+		do_allmodconfig=`doyesno "$1" --do-allmodconfig`
+		;;
+	--do-clocksourcewd|--do-no-clocksourcewd)
+		do_clocksourcewd=`doyesno "$1" --do-clocksourcewd`
+		;;
+	--do-kasan|--do-no-kasan)
+		do_kasan=`doyesno "$1" --do-kasan`
+		;;
+	--do-kcsan|--do-no-kcsan)
+		do_kcsan=`doyesno "$1" --do-kcsan`
+		;;
+	--do-kvfree|--do-no-kvfree)
+		do_kvfree=`doyesno "$1" --do-kvfree`
+		;;
+	--do-locktorture|--do-no-locktorture)
+		do_locktorture=`doyesno "$1" --do-locktorture`
+		;;
+	--do-none|--donone)
+		do_allmodconfig=no
+		do_rcutorture=no
+		do_locktorture=no
+		do_scftorture=no
+		do_rcuscale=no
+		do_refscale=no
+		do_rt=no
+		do_kvfree=no
+		do_kasan=no
+		do_kcsan=no
+		do_clocksourcewd=no
+		;;
+	--do-rcuscale|--do-no-rcuscale)
+		do_rcuscale=`doyesno "$1" --do-rcuscale`
+		;;
+	--do-rcutorture|--do-no-rcutorture)
+		do_rcutorture=`doyesno "$1" --do-rcutorture`
+		;;
+	--do-refscale|--do-no-refscale)
+		do_refscale=`doyesno "$1" --do-refscale`
+		;;
+	--do-rt|--do-no-rt)
+		do_rt=`doyesno "$1" --do-rt`
+		;;
+	--do-scftorture|--do-no-scftorture)
+		do_scftorture=`doyesno "$1" --do-scftorture`
+		;;
+	--duration)
+		checkarg --duration "(minutes)" $# "$2" '^[0-9][0-9]*\(m\|h\|d\|\)$' '^error'
+		mult=1
+		if echo "$2" | grep -q 'm$'
+		then
+			mult=1
+		elif echo "$2" | grep -q 'h$'
+		then
+			mult=60
+		elif echo "$2" | grep -q 'd$'
+		then
+			mult=1440
+		fi
+		ts=`echo $2 | sed -e 's/[smhd]$//'`
+		duration_base=$(($ts*mult))
+		shift
+		;;
+	--kcsan-kmake-arg|--kcsan-kmake-args)
+		checkarg --kcsan-kmake-arg "(kernel make arguments)" $# "$2" '.*' '^error$'
+		kcsan_kmake_args="`echo "$kcsan_kmake_args $2" | sed -e 's/^ *//' -e 's/ *$//'`"
+		shift
+		;;
+	*)
+		echo Unknown argument $1
+		usage
+		;;
+	esac
+	shift
+done
+
+ds="`date +%Y.%m.%d-%H.%M.%S`-torture"
+startdate="`date`"
+starttime="`get_starttime`"
+
+T=/tmp/torture.sh.$$
+trap 'rm -rf $T' 0 2
+mkdir $T
+
+echo " --- " $scriptname $args | tee -a $T/log
+echo " --- Results directory: " $ds | tee -a $T/log
+
+# Calculate rcutorture defaults and apportion time
+if test -z "$configs_rcutorture"
+then
+	configs_rcutorture=CFLIST
+fi
+duration_rcutorture=$((duration_base*duration_rcutorture_frac/10))
+if test "$duration_rcutorture" -eq 0
+then
+	echo " --- Zero time for rcutorture, disabling" | tee -a $T/log
+	do_rcutorture=no
+fi
+
+# Calculate locktorture defaults and apportion time
+if test -z "$configs_locktorture"
+then
+	configs_locktorture=CFLIST
+fi
+duration_locktorture=$((duration_base*duration_locktorture_frac/10))
+if test "$duration_locktorture" -eq 0
+then
+	echo " --- Zero time for locktorture, disabling" | tee -a $T/log
+	do_locktorture=no
+fi
+
+# Calculate scftorture defaults and apportion time
+if test -z "$configs_scftorture"
+then
+	configs_scftorture=CFLIST
+fi
+duration_scftorture=$((duration_base*duration_scftorture_frac/10))
+if test "$duration_scftorture" -eq 0
+then
+	echo " --- Zero time for scftorture, disabling" | tee -a $T/log
+	do_scftorture=no
+fi
+
+touch $T/failures
+touch $T/successes
+
+# torture_one - Does a single kvm.sh run.
+#
+# Usage:
+#	torture_bootargs="[ kernel boot arguments ]"
+#	torture_one flavor [ kvm.sh arguments ]
+#
+# Note that "flavor" is an arbitrary string.  Supply --torture if needed.
+# Note that quoting is problematic.  So on the command line, pass multiple
+# values with multiple kvm.sh argument instances.
+function torture_one {
+	local cur_bootargs=
+	local boottag=
+
+	echo " --- $curflavor:" Start `date` | tee -a $T/log
+	if test -n "$torture_bootargs"
+	then
+		boottag="--bootargs"
+		cur_bootargs="$torture_bootargs"
+	fi
+	"$@" $boottag "$cur_bootargs" --datestamp "$ds/results-$curflavor" > $T/$curflavor.out 2>&1
+	retcode=$?
+	resdir="`grep '^Results directory: ' $T/$curflavor.out | tail -1 | sed -e 's/^Results directory: //'`"
+	if test -z "$resdir"
+	then
+		cat $T/$curflavor.out | tee -a $T/log
+		echo retcode=$retcode | tee -a $T/log
+	fi
+	if test "$retcode" == 0
+	then
+		echo "$curflavor($retcode)" $resdir >> $T/successes
+	else
+		echo "$curflavor($retcode)" $resdir >> $T/failures
+	fi
+}
+
+# torture_set - Does a set of tortures with and without KASAN and KCSAN.
+#
+# Usage:
+#	torture_bootargs="[ kernel boot arguments ]"
+#	torture_set flavor [ kvm.sh arguments ]
+#
+# Note that "flavor" is an arbitrary string that does not affect kvm.sh
+# in any way.  So also supply --torture if you need something other than
+# the default.
+function torture_set {
+	local cur_kcsan_kmake_args=
+	local kcsan_kmake_tag=
+	local flavor=$1
+	shift
+	curflavor=$flavor
+	torture_one "$@"
+	if test "$do_kasan" = "yes"
+	then
+		curflavor=${flavor}-kasan
+		torture_one "$@" --kasan
+	fi
+	if test "$do_kcsan" = "yes"
+	then
+		curflavor=${flavor}-kcsan
+		if test -n "$kcsan_kmake_args"
+		then
+			kcsan_kmake_tag="--kmake-args"
+			cur_kcsan_kmake_args="$kcsan_kmake_args"
+		fi
+		torture_one "$@" --kconfig "CONFIG_DEBUG_LOCK_ALLOC=y CONFIG_PROVE_LOCKING=y" $kcsan_kmake_tag $cur_kcsan_kmake_args --kcsan
+	fi
+}
+
+# make allmodconfig
+if test "$do_allmodconfig" = "yes"
+then
+	echo " --- allmodconfig:" Start `date` | tee -a $T/log
+	amcdir="tools/testing/selftests/rcutorture/res/$ds/allmodconfig"
+	mkdir -p "$amcdir"
+	echo " --- make clean" > "$amcdir/Make.out" 2>&1
+	make -j$MAKE_ALLOTED_CPUS clean >> "$amcdir/Make.out" 2>&1
+	echo " --- make allmodconfig" >> "$amcdir/Make.out" 2>&1
+	cp .config $amcdir
+	make -j$MAKE_ALLOTED_CPUS allmodconfig >> "$amcdir/Make.out" 2>&1
+	echo " --- make " >> "$amcdir/Make.out" 2>&1
+	make -j$MAKE_ALLOTED_CPUS >> "$amcdir/Make.out" 2>&1
+	retcode="$?"
+	echo $retcode > "$amcdir/Make.exitcode"
+	if test "$retcode" == 0
+	then
+		echo "allmodconfig($retcode)" $amcdir >> $T/successes
+	else
+		echo "allmodconfig($retcode)" $amcdir >> $T/failures
+	fi
+fi
+
+# --torture rcu
+if test "$do_rcutorture" = "yes"
+then
+	torture_bootargs="rcupdate.rcu_cpu_stall_suppress_at_boot=1 torture.disable_onoff_at_boot rcupdate.rcu_task_stall_timeout=30000"
+	torture_set "rcutorture" tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration "$duration_rcutorture" --configs "$configs_rcutorture" --trust-make
+fi
+
+if test "$do_locktorture" = "yes"
+then
+	torture_bootargs="torture.disable_onoff_at_boot"
+	torture_set "locktorture" tools/testing/selftests/rcutorture/bin/kvm.sh --torture lock --allcpus --duration "$duration_locktorture" --configs "$configs_locktorture" --trust-make
+fi
+
+if test "$do_scftorture" = "yes"
+then
+	torture_bootargs="scftorture.nthreads=$HALF_ALLOTED_CPUS torture.disable_onoff_at_boot csdlock_debug=1"
+	torture_set "scftorture" tools/testing/selftests/rcutorture/bin/kvm.sh --torture scf --allcpus --duration "$duration_scftorture" --configs "$configs_scftorture" --kconfig "CONFIG_NR_CPUS=$HALF_ALLOTED_CPUS" --memory 2G --trust-make
+fi
+
+if test "$do_rt" = "yes"
+then
+	# With all post-boot grace periods forced to normal.
+	torture_bootargs="rcupdate.rcu_cpu_stall_suppress_at_boot=1 torture.disable_onoff_at_boot rcupdate.rcu_task_stall_timeout=30000 rcupdate.rcu_normal=1"
+	torture_set "rcurttorture" tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration "$duration_rcutorture" --configs "TREE03" --trust-make
+
+	# With all post-boot grace periods forced to expedited.
+	torture_bootargs="rcupdate.rcu_cpu_stall_suppress_at_boot=1 torture.disable_onoff_at_boot rcupdate.rcu_task_stall_timeout=30000 rcupdate.rcu_expedited=1"
+	torture_set "rcurttorture-exp" tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration "$duration_rcutorture" --configs "TREE03" --trust-make
+fi
+
+if test "$do_refscale" = yes
+then
+	primlist="`grep '\.name[ 	]*=' kernel/rcu/refscale.c | sed -e 's/^[^"]*"//' -e 's/".*$//'`"
+else
+	primlist=
+fi
+for prim in $primlist
+do
+	torture_bootargs="refscale.scale_type="$prim" refscale.nreaders=$HALF_ALLOTED_CPUS refscale.loops=10000 refscale.holdoff=20 torture.disable_onoff_at_boot"
+	torture_set "refscale-$prim" tools/testing/selftests/rcutorture/bin/kvm.sh --torture refscale --allcpus --duration 5 --kconfig "CONFIG_TASKS_TRACE_RCU=y CONFIG_NR_CPUS=$HALF_ALLOTED_CPUS" --bootargs "verbose_batched=$VERBOSE_BATCH_CPUS torture.verbose_sleep_frequency=8 torture.verbose_sleep_duration=$VERBOSE_BATCH_CPUS" --trust-make
+done
+
+if test "$do_rcuscale" = yes
+then
+	primlist="`grep '\.name[ 	]*=' kernel/rcu/rcuscale.c | sed -e 's/^[^"]*"//' -e 's/".*$//'`"
+else
+	primlist=
+fi
+for prim in $primlist
+do
+	torture_bootargs="rcuscale.scale_type="$prim" rcuscale.nwriters=$HALF_ALLOTED_CPUS rcuscale.holdoff=20 torture.disable_onoff_at_boot"
+	torture_set "rcuscale-$prim" tools/testing/selftests/rcutorture/bin/kvm.sh --torture rcuscale --allcpus --duration 5 --kconfig "CONFIG_TASKS_TRACE_RCU=y CONFIG_NR_CPUS=$HALF_ALLOTED_CPUS" --trust-make
+done
+
+if test "$do_kvfree" = "yes"
+then
+	torture_bootargs="rcuscale.kfree_rcu_test=1 rcuscale.kfree_nthreads=16 rcuscale.holdoff=20 rcuscale.kfree_loops=10000 torture.disable_onoff_at_boot"
+	torture_set "rcuscale-kvfree" tools/testing/selftests/rcutorture/bin/kvm.sh --torture rcuscale --allcpus --duration 10 --kconfig "CONFIG_NR_CPUS=$HALF_ALLOTED_CPUS" --memory 2G --trust-make
+fi
+
+if test "$do_clocksourcewd" = "yes"
+then
+	torture_bootargs="rcupdate.rcu_cpu_stall_suppress_at_boot=1 torture.disable_onoff_at_boot rcupdate.rcu_task_stall_timeout=30000"
+	torture_set "clocksourcewd-1" tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 45s --configs TREE03 --kconfig "CONFIG_TEST_CLOCKSOURCE_WATCHDOG=y" --trust-make
+
+	torture_bootargs="rcupdate.rcu_cpu_stall_suppress_at_boot=1 torture.disable_onoff_at_boot rcupdate.rcu_task_stall_timeout=30000 clocksource.max_cswd_read_retries=1"
+	torture_set "clocksourcewd-2" tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 45s --configs TREE03 --kconfig "CONFIG_TEST_CLOCKSOURCE_WATCHDOG=y" --trust-make
+
+	# In case our work is already done...
+	if test "$do_rcutorture" != "yes"
+	then
+		torture_bootargs="rcupdate.rcu_cpu_stall_suppress_at_boot=1 torture.disable_onoff_at_boot rcupdate.rcu_task_stall_timeout=30000"
+		torture_set "clocksourcewd-3" tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 45s --configs TREE03 --trust-make
+	fi
+fi
+
+echo " --- " $scriptname $args
+echo " --- " Done `date` | tee -a $T/log
+ret=0
+nsuccesses=0
+echo SUCCESSES: | tee -a $T/log
+if test -s "$T/successes"
+then
+	cat "$T/successes" | tee -a $T/log
+	nsuccesses="`wc -l "$T/successes" | awk '{ print $1 }'`"
+fi
+nfailures=0
+echo FAILURES: | tee -a $T/log
+if test -s "$T/failures"
+then
+	awk < "$T/failures" -v sq="'" '{ print "echo " sq $0 sq; print "sed -e " sq "1,/^ --- .* Test summary:$/d" sq " " $2 "/log | grep Summary: | sed -e " sq "s/^[^S]*/  /" sq; }' | sh | tee -a $T/log | tee "$T/failuresum"
+	nfailures="`wc -l "$T/failures" | awk '{ print $1 }'`"
+	grep "^  Summary: " "$T/failuresum" |
+		grep -v '^  Summary: Bugs: [0-9]* (all bugs kcsan)$' > "$T/nonkcsan"
+	if test -s "$T/nonkcsan"
+	then
+		nonkcsanbug="yes"
+	fi
+	ret=2
+fi
+if test "$do_kcsan" = "yes"
+then
+	TORTURE_KCONFIG_KCSAN_ARG=1 tools/testing/selftests/rcutorture/bin/kcsan-collapse.sh tools/testing/selftests/rcutorture/res/$ds > tools/testing/selftests/rcutorture/res/$ds/kcsan.sum
+fi
+echo Started at $startdate, ended at `date`, duration `get_starttime_duration $starttime`. | tee -a $T/log
+echo Summary: Successes: $nsuccesses Failures: $nfailures. | tee -a $T/log
+if test -z "$nonkcsanbug" && test -s "$T/failuresum"
+then
+	echo "  All bugs were KCSAN failures."
+fi
+tdir="`cat $T/successes $T/failures | head -1 | awk '{ print $NF }' | sed -e 's,/[^/]\+/*$,,'`"
+if test -n "$tdir" && test $compress_concurrency -gt 0
+then
+	# KASAN vmlinux files can approach 1GB in size, so compress them.
+	echo Looking for K[AC]SAN files to compress: `date` > "$tdir/log-xz" 2>&1
+	find "$tdir" -type d -name '*-k[ac]san' -print > $T/xz-todo
+	ncompresses=0
+	batchno=1
+	if test -s $T/xz-todo
+	then
+		for i in `cat $T/xz-todo`
+		do
+			find $i -name 'vmlinux*' -print
+		done | wc -l | awk '{ print $1 }' > $T/xz-todo-count
+		n2compress="`cat $T/xz-todo-count`"
+		echo Size before compressing $n2compress files: `du -sh $tdir | awk '{ print $1 }'` `date` 2>&1 | tee -a "$tdir/log-xz" | tee -a $T/log
+		for i in `cat $T/xz-todo`
+		do
+			echo Compressing vmlinux files in ${i}: `date` >> "$tdir/log-xz" 2>&1
+			for j in $i/*/vmlinux
+			do
+				xz "$j" >> "$tdir/log-xz" 2>&1 &
+				ncompresses=$((ncompresses+1))
+				if test $ncompresses -ge $compress_concurrency
+				then
+					echo Waiting for batch $batchno of $ncompresses compressions `date` | tee -a "$tdir/log-xz" | tee -a $T/log
+					wait
+					ncompresses=0
+					batchno=$((batchno+1))
+				fi
+			done
+		done
+		if test $ncompresses -gt 0
+		then
+			echo Waiting for final batch $batchno of $ncompresses compressions `date` | tee -a "$tdir/log-xz" | tee -a $T/log
+		fi
+		wait
+		echo Size after compressing $n2compress files: `du -sh $tdir | awk '{ print $1 }'` `date` 2>&1 | tee -a "$tdir/log-xz" | tee -a $T/log
+		echo Total duration `get_starttime_duration $starttime`. | tee -a $T/log
+	else
+		echo No compression needed: `date` >> "$tdir/log-xz" 2>&1
+	fi
+fi
+if test -n "$tdir"
+then
+	cp $T/log "$tdir"
+fi
+exit $ret
diff --git a/tools/testing/selftests/rcutorture/configs/lock/BUSTED b/tools/testing/selftests/rcutorture/configs/lock/BUSTED
new file mode 100644
index 000000000..1d1da1477
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/lock/BUSTED
@@ -0,0 +1,6 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=4
+CONFIG_HOTPLUG_CPU=y
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
diff --git a/tools/testing/selftests/rcutorture/configs/lock/BUSTED.boot b/tools/testing/selftests/rcutorture/configs/lock/BUSTED.boot
new file mode 100644
index 000000000..6386c15e9
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/lock/BUSTED.boot
@@ -0,0 +1 @@
+locktorture.torture_type=lock_busted
diff --git a/tools/testing/selftests/rcutorture/configs/lock/CFLIST b/tools/testing/selftests/rcutorture/configs/lock/CFLIST
new file mode 100644
index 000000000..41bae5824
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/lock/CFLIST
@@ -0,0 +1,7 @@
+LOCK01
+LOCK02
+LOCK03
+LOCK04
+LOCK05
+LOCK06
+LOCK07
diff --git a/tools/testing/selftests/rcutorture/configs/lock/CFcommon b/tools/testing/selftests/rcutorture/configs/lock/CFcommon
new file mode 100644
index 000000000..e372dc269
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/lock/CFcommon
@@ -0,0 +1,2 @@
+CONFIG_LOCK_TORTURE_TEST=y
+CONFIG_PRINTK_TIME=y
diff --git a/tools/testing/selftests/rcutorture/configs/lock/LOCK01 b/tools/testing/selftests/rcutorture/configs/lock/LOCK01
new file mode 100644
index 000000000..a9625e3d6
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/lock/LOCK01
@@ -0,0 +1,6 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=8
+CONFIG_HOTPLUG_CPU=y
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
diff --git a/tools/testing/selftests/rcutorture/configs/lock/LOCK02 b/tools/testing/selftests/rcutorture/configs/lock/LOCK02
new file mode 100644
index 000000000..1d1da1477
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/lock/LOCK02
@@ -0,0 +1,6 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=4
+CONFIG_HOTPLUG_CPU=y
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
diff --git a/tools/testing/selftests/rcutorture/configs/lock/LOCK02.boot b/tools/testing/selftests/rcutorture/configs/lock/LOCK02.boot
new file mode 100644
index 000000000..5aa44b4f1
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/lock/LOCK02.boot
@@ -0,0 +1 @@
+locktorture.torture_type=mutex_lock
diff --git a/tools/testing/selftests/rcutorture/configs/lock/LOCK03 b/tools/testing/selftests/rcutorture/configs/lock/LOCK03
new file mode 100644
index 000000000..1d1da1477
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/lock/LOCK03
@@ -0,0 +1,6 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=4
+CONFIG_HOTPLUG_CPU=y
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
diff --git a/tools/testing/selftests/rcutorture/configs/lock/LOCK03.boot b/tools/testing/selftests/rcutorture/configs/lock/LOCK03.boot
new file mode 100644
index 000000000..a67bbe024
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/lock/LOCK03.boot
@@ -0,0 +1 @@
+locktorture.torture_type=rwsem_lock
diff --git a/tools/testing/selftests/rcutorture/configs/lock/LOCK04 b/tools/testing/selftests/rcutorture/configs/lock/LOCK04
new file mode 100644
index 000000000..1d1da1477
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/lock/LOCK04
@@ -0,0 +1,6 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=4
+CONFIG_HOTPLUG_CPU=y
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
diff --git a/tools/testing/selftests/rcutorture/configs/lock/LOCK04.boot b/tools/testing/selftests/rcutorture/configs/lock/LOCK04.boot
new file mode 100644
index 000000000..48c04fe47
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/lock/LOCK04.boot
@@ -0,0 +1 @@
+locktorture.torture_type=rw_lock
diff --git a/tools/testing/selftests/rcutorture/configs/lock/LOCK05 b/tools/testing/selftests/rcutorture/configs/lock/LOCK05
new file mode 100644
index 000000000..1d1da1477
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/lock/LOCK05
@@ -0,0 +1,6 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=4
+CONFIG_HOTPLUG_CPU=y
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
diff --git a/tools/testing/selftests/rcutorture/configs/lock/LOCK05.boot b/tools/testing/selftests/rcutorture/configs/lock/LOCK05.boot
new file mode 100644
index 000000000..8ac37307c
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/lock/LOCK05.boot
@@ -0,0 +1 @@
+locktorture.torture_type=rtmutex_lock
diff --git a/tools/testing/selftests/rcutorture/configs/lock/LOCK06 b/tools/testing/selftests/rcutorture/configs/lock/LOCK06
new file mode 100644
index 000000000..1d1da1477
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/lock/LOCK06
@@ -0,0 +1,6 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=4
+CONFIG_HOTPLUG_CPU=y
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
diff --git a/tools/testing/selftests/rcutorture/configs/lock/LOCK06.boot b/tools/testing/selftests/rcutorture/configs/lock/LOCK06.boot
new file mode 100644
index 000000000..f92219cd4
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/lock/LOCK06.boot
@@ -0,0 +1 @@
+locktorture.torture_type=percpu_rwsem_lock
diff --git a/tools/testing/selftests/rcutorture/configs/lock/LOCK07 b/tools/testing/selftests/rcutorture/configs/lock/LOCK07
new file mode 100644
index 000000000..1d1da1477
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/lock/LOCK07
@@ -0,0 +1,6 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=4
+CONFIG_HOTPLUG_CPU=y
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
diff --git a/tools/testing/selftests/rcutorture/configs/lock/LOCK07.boot b/tools/testing/selftests/rcutorture/configs/lock/LOCK07.boot
new file mode 100644
index 000000000..97dadd1a9
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/lock/LOCK07.boot
@@ -0,0 +1 @@
+locktorture.torture_type=ww_mutex_lock
diff --git a/tools/testing/selftests/rcutorture/configs/lock/ver_functions.sh b/tools/testing/selftests/rcutorture/configs/lock/ver_functions.sh
new file mode 100644
index 000000000..d3e4b2971
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/lock/ver_functions.sh
@@ -0,0 +1,29 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Kernel-version-dependent shell functions for the rest of the scripts.
+#
+# Copyright (C) IBM Corporation, 2014
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+# locktorture_param_onoff bootparam-string config-file
+#
+# Adds onoff locktorture module parameters to kernels having it.
+locktorture_param_onoff () {
+	if ! bootparam_hotplug_cpu "$1" && configfrag_hotplug_cpu "$2"
+	then
+		echo CPU-hotplug kernel, adding locktorture onoff. 1>&2
+		echo locktorture.onoff_interval=3 locktorture.onoff_holdoff=30
+	fi
+}
+
+# per_version_boot_params bootparam-string config-file seconds
+#
+# Adds per-version torture-module parameters to kernels supporting them.
+per_version_boot_params () {
+	echo $1 `locktorture_param_onoff "$1" "$2"` \
+		locktorture.stat_interval=15 \
+		locktorture.shutdown_secs=$3 \
+		locktorture.verbose=1
+}
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/BUSTED b/tools/testing/selftests/rcutorture/configs/rcu/BUSTED
new file mode 100644
index 000000000..48d8a245c
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/BUSTED
@@ -0,0 +1,7 @@
+CONFIG_RCU_TRACE=n
+CONFIG_SMP=y
+CONFIG_NR_CPUS=4
+CONFIG_HOTPLUG_CPU=y
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/BUSTED-BOOST b/tools/testing/selftests/rcutorture/configs/rcu/BUSTED-BOOST
new file mode 100644
index 000000000..22d598f9c
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/BUSTED-BOOST
@@ -0,0 +1,17 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=16
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
+#CHECK#CONFIG_PREEMPT_RCU=y
+CONFIG_HZ_PERIODIC=y
+CONFIG_NO_HZ_IDLE=n
+CONFIG_NO_HZ_FULL=n
+CONFIG_RCU_TRACE=y
+CONFIG_HOTPLUG_CPU=y
+CONFIG_RCU_FANOUT=2
+CONFIG_RCU_FANOUT_LEAF=2
+CONFIG_RCU_NOCB_CPU=n
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_RCU_EXPERT=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/BUSTED-BOOST.boot b/tools/testing/selftests/rcutorture/configs/rcu/BUSTED-BOOST.boot
new file mode 100644
index 000000000..84f6bb98c
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/BUSTED-BOOST.boot
@@ -0,0 +1,8 @@
+rcutorture.test_boost=2
+rcutorture.stutter=0
+rcutree.gp_preinit_delay=12
+rcutree.gp_init_delay=3
+rcutree.gp_cleanup_delay=3
+rcutree.kthread_prio=2
+threadirqs
+rcutree.use_softirq=0
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/BUSTED.boot b/tools/testing/selftests/rcutorture/configs/rcu/BUSTED.boot
new file mode 100644
index 000000000..be7728db4
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/BUSTED.boot
@@ -0,0 +1 @@
+rcutorture.torture_type=busted
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/CFLIST b/tools/testing/selftests/rcutorture/configs/rcu/CFLIST
new file mode 100644
index 000000000..98b6175e5
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/CFLIST
@@ -0,0 +1,19 @@
+TREE01
+TREE02
+TREE03
+TREE04
+TREE05
+TREE07
+TREE09
+SRCU-N
+SRCU-P
+SRCU-T
+SRCU-U
+TINY01
+TINY02
+TASKS01
+TASKS02
+TASKS03
+RUDE01
+TRACE01
+TRACE02
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/CFcommon b/tools/testing/selftests/rcutorture/configs/rcu/CFcommon
new file mode 100644
index 000000000..0e92d8531
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/CFcommon
@@ -0,0 +1,7 @@
+CONFIG_RCU_TORTURE_TEST=y
+CONFIG_PRINTK_TIME=y
+CONFIG_HYPERVISOR_GUEST=y
+CONFIG_PARAVIRT=y
+CONFIG_KVM_GUEST=y
+CONFIG_KCSAN_ASSUME_PLAIN_WRITES_ATOMIC=n
+CONFIG_KCSAN_REPORT_VALUE_CHANGE_ONLY=n
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/RUDE01 b/tools/testing/selftests/rcutorture/configs/rcu/RUDE01
new file mode 100644
index 000000000..6fd6acb94
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/RUDE01
@@ -0,0 +1,12 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=3
+CONFIG_HOTPLUG_CPU=y
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
+CONFIG_DEBUG_LOCK_ALLOC=y
+CONFIG_PROVE_LOCKING=y
+#CHECK#CONFIG_PROVE_RCU=y
+CONFIG_RCU_EXPERT=y
+CONFIG_FORCE_TASKS_RUDE_RCU=y
+#CHECK#CONFIG_TASKS_RUDE_RCU=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/RUDE01.boot b/tools/testing/selftests/rcutorture/configs/rcu/RUDE01.boot
new file mode 100644
index 000000000..932a0799e
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/RUDE01.boot
@@ -0,0 +1,2 @@
+rcutorture.torture_type=tasks-rude
+rcutree.use_softirq=0
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/SRCU-N b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-N
new file mode 100644
index 000000000..07f5e0a70
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-N
@@ -0,0 +1,10 @@
+CONFIG_RCU_TRACE=n
+CONFIG_SMP=y
+CONFIG_NR_CPUS=4
+CONFIG_HOTPLUG_CPU=y
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+#CHECK#CONFIG_RCU_EXPERT=n
+CONFIG_KPROBES=n
+CONFIG_FTRACE=n
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/SRCU-N.boot b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-N.boot
new file mode 100644
index 000000000..ce0694fd9
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-N.boot
@@ -0,0 +1,2 @@
+rcutorture.torture_type=srcu
+rcutorture.fwd_progress=3
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/SRCU-P b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-P
new file mode 100644
index 000000000..ab7ccd382
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-P
@@ -0,0 +1,12 @@
+CONFIG_RCU_TRACE=n
+CONFIG_SMP=y
+CONFIG_NR_CPUS=8
+CONFIG_HOTPLUG_CPU=y
+CONFIG_RCU_EXPERT=y
+CONFIG_RCU_FANOUT=2
+CONFIG_RCU_FANOUT_LEAF=2
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
+CONFIG_DEBUG_LOCK_ALLOC=y
+CONFIG_PROVE_LOCKING=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/SRCU-P.boot b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-P.boot
new file mode 100644
index 000000000..2db39f298
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-P.boot
@@ -0,0 +1,4 @@
+rcutorture.torture_type=srcud
+rcupdate.rcu_self_test=1
+rcutorture.fwd_progress=3
+srcutree.big_cpu_lim=5
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/SRCU-T b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-T
new file mode 100644
index 000000000..c70cf0405
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-T
@@ -0,0 +1,12 @@
+CONFIG_SMP=n
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+CONFIG_PREEMPT_DYNAMIC=n
+#CHECK#CONFIG_TINY_SRCU=y
+CONFIG_RCU_TRACE=n
+CONFIG_DEBUG_LOCK_ALLOC=y
+CONFIG_PROVE_LOCKING=y
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_DEBUG_ATOMIC_SLEEP=y
+#CHECK#CONFIG_PREEMPT_COUNT=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/SRCU-T.boot b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-T.boot
new file mode 100644
index 000000000..238bfe3bd
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-T.boot
@@ -0,0 +1 @@
+rcutorture.torture_type=srcu
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/SRCU-U b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-U
new file mode 100644
index 000000000..bc9eeabaa
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-U
@@ -0,0 +1,10 @@
+CONFIG_SMP=n
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+CONFIG_PREEMPT_DYNAMIC=n
+#CHECK#CONFIG_TINY_SRCU=y
+CONFIG_RCU_TRACE=n
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_PREEMPT_COUNT=n
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/SRCU-U.boot b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-U.boot
new file mode 100644
index 000000000..ce48c7b82
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-U.boot
@@ -0,0 +1,2 @@
+rcutorture.torture_type=srcud
+rcupdate.rcu_self_test=1
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TASKS01 b/tools/testing/selftests/rcutorture/configs/rcu/TASKS01
new file mode 100644
index 000000000..d84801b9a
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TASKS01
@@ -0,0 +1,11 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=4
+CONFIG_HOTPLUG_CPU=y
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
+CONFIG_DEBUG_LOCK_ALLOC=y
+CONFIG_PROVE_LOCKING=y
+#CHECK#CONFIG_PROVE_RCU=y
+CONFIG_TASKS_RCU=y
+CONFIG_RCU_EXPERT=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TASKS01.boot b/tools/testing/selftests/rcutorture/configs/rcu/TASKS01.boot
new file mode 100644
index 000000000..30ca5b493
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TASKS01.boot
@@ -0,0 +1,3 @@
+rcutorture.torture_type=tasks
+rcutree.use_softirq=0
+rcupdate.rcu_task_enqueue_lim=4
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TASKS02 b/tools/testing/selftests/rcutorture/configs/rcu/TASKS02
new file mode 100644
index 000000000..2f9fcffff
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TASKS02
@@ -0,0 +1,8 @@
+CONFIG_SMP=n
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+CONFIG_PREEMPT_DYNAMIC=n
+#CHECK#CONFIG_TASKS_RCU=y
+CONFIG_FORCE_TASKS_RCU=y
+CONFIG_RCU_EXPERT=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TASKS02.boot b/tools/testing/selftests/rcutorture/configs/rcu/TASKS02.boot
new file mode 100644
index 000000000..b9b6d67cb
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TASKS02.boot
@@ -0,0 +1,2 @@
+rcutorture.torture_type=tasks
+rcutorture.stat_interval=60
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TASKS03 b/tools/testing/selftests/rcutorture/configs/rcu/TASKS03
new file mode 100644
index 000000000..dea26c568
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TASKS03
@@ -0,0 +1,11 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=4
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=n
+CONFIG_NO_HZ_FULL=y
+#CHECK#CONFIG_RCU_EXPERT=n
+CONFIG_TASKS_RCU=y
+CONFIG_RCU_EXPERT=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TASKS03.boot b/tools/testing/selftests/rcutorture/configs/rcu/TASKS03.boot
new file mode 100644
index 000000000..838297c58
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TASKS03.boot
@@ -0,0 +1 @@
+rcutorture.torture_type=tasks nohz_full=1
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TINY01 b/tools/testing/selftests/rcutorture/configs/rcu/TINY01
new file mode 100644
index 000000000..0953c52fc
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TINY01
@@ -0,0 +1,14 @@
+CONFIG_SMP=n
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+CONFIG_PREEMPT_DYNAMIC=n
+#CHECK#CONFIG_TINY_RCU=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_RCU_TRACE=n
+#CHECK#CONFIG_RCU_STALL_COMMON=n
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_PREEMPT_COUNT=n
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TINY02 b/tools/testing/selftests/rcutorture/configs/rcu/TINY02
new file mode 100644
index 000000000..30439f6fc
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TINY02
@@ -0,0 +1,15 @@
+CONFIG_SMP=n
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+CONFIG_PREEMPT_DYNAMIC=n
+#CHECK#CONFIG_TINY_RCU=y
+CONFIG_HZ_PERIODIC=y
+CONFIG_NO_HZ_IDLE=n
+CONFIG_NO_HZ_FULL=n
+CONFIG_PROVE_LOCKING=y
+#CHECK#CONFIG_PROVE_RCU=y
+CONFIG_DEBUG_LOCK_ALLOC=y
+CONFIG_DEBUG_OBJECTS=y
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=y
+CONFIG_DEBUG_ATOMIC_SLEEP=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TINY02.boot b/tools/testing/selftests/rcutorture/configs/rcu/TINY02.boot
new file mode 100644
index 000000000..b39f1553a
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TINY02.boot
@@ -0,0 +1 @@
+rcupdate.rcu_self_test=1
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TRACE01 b/tools/testing/selftests/rcutorture/configs/rcu/TRACE01
new file mode 100644
index 000000000..85b407467
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TRACE01
@@ -0,0 +1,14 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=5
+CONFIG_HOTPLUG_CPU=y
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+CONFIG_PREEMPT_DYNAMIC=n
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_PROVE_LOCKING=n
+#CHECK#CONFIG_PROVE_RCU=n
+CONFIG_FORCE_TASKS_TRACE_RCU=y
+#CHECK#CONFIG_TASKS_TRACE_RCU=y
+CONFIG_TASKS_TRACE_RCU_READ_MB=y
+CONFIG_RCU_EXPERT=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TRACE01.boot b/tools/testing/selftests/rcutorture/configs/rcu/TRACE01.boot
new file mode 100644
index 000000000..ba6d636a4
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TRACE01.boot
@@ -0,0 +1,2 @@
+rcutorture.torture_type=tasks-tracing
+rcupdate.rcu_task_enqueue_lim=2
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TRACE02 b/tools/testing/selftests/rcutorture/configs/rcu/TRACE02
new file mode 100644
index 000000000..093ea6e8e
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TRACE02
@@ -0,0 +1,13 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=4
+CONFIG_HOTPLUG_CPU=y
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
+CONFIG_DEBUG_LOCK_ALLOC=y
+CONFIG_PROVE_LOCKING=y
+#CHECK#CONFIG_PROVE_RCU=y
+CONFIG_FORCE_TASKS_TRACE_RCU=y
+#CHECK#CONFIG_TASKS_TRACE_RCU=y
+CONFIG_TASKS_TRACE_RCU_READ_MB=n
+CONFIG_RCU_EXPERT=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TRACE02.boot b/tools/testing/selftests/rcutorture/configs/rcu/TRACE02.boot
new file mode 100644
index 000000000..c70b5db6c
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TRACE02.boot
@@ -0,0 +1,2 @@
+rcutorture.torture_type=tasks-tracing
+rcutorture.fwd_progress=2
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE01 b/tools/testing/selftests/rcutorture/configs/rcu/TREE01
new file mode 100644
index 000000000..8ae41d5f8
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE01
@@ -0,0 +1,17 @@
+CONFIG_SMP=y
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
+#CHECK#CONFIG_PREEMPT_RCU=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_RCU_TRACE=y
+CONFIG_HOTPLUG_CPU=y
+CONFIG_MAXSMP=y
+CONFIG_CPUMASK_OFFSTACK=y
+CONFIG_RCU_NOCB_CPU=y
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_RCU_BOOST=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_RCU_EXPERT=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE01.boot b/tools/testing/selftests/rcutorture/configs/rcu/TREE01.boot
new file mode 100644
index 000000000..40af3df0f
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE01.boot
@@ -0,0 +1,8 @@
+maxcpus=8 nr_cpus=43
+rcutree.gp_preinit_delay=3
+rcutree.gp_init_delay=3
+rcutree.gp_cleanup_delay=3
+rcu_nocbs=0-1,3-7
+rcutorture.nocbs_nthreads=8
+rcutorture.nocbs_toggle=1000
+rcutorture.fwd_progress=0
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE02 b/tools/testing/selftests/rcutorture/configs/rcu/TREE02
new file mode 100644
index 000000000..2871ee599
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE02
@@ -0,0 +1,19 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=8
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
+#CHECK#CONFIG_PREEMPT_RCU=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_RCU_TRACE=n
+CONFIG_RCU_FANOUT=3
+CONFIG_RCU_FANOUT_LEAF=3
+CONFIG_RCU_NOCB_CPU=n
+CONFIG_DEBUG_LOCK_ALLOC=y
+CONFIG_PROVE_LOCKING=n
+CONFIG_RCU_BOOST=n
+CONFIG_RCU_EXPERT=y
+CONFIG_DEBUG_OBJECTS=y
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE02.boot b/tools/testing/selftests/rcutorture/configs/rcu/TREE02.boot
new file mode 100644
index 000000000..dd914fa8f
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE02.boot
@@ -0,0 +1 @@
+rcutorture.fwd_progress=2
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE03 b/tools/testing/selftests/rcutorture/configs/rcu/TREE03
new file mode 100644
index 000000000..2dc31b16e
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE03
@@ -0,0 +1,18 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=16
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
+#CHECK#CONFIG_PREEMPT_RCU=y
+CONFIG_HZ_PERIODIC=y
+CONFIG_NO_HZ_IDLE=n
+CONFIG_NO_HZ_FULL=n
+CONFIG_RCU_TRACE=y
+CONFIG_HOTPLUG_CPU=y
+CONFIG_RCU_FANOUT=2
+CONFIG_RCU_FANOUT_LEAF=2
+CONFIG_RCU_NOCB_CPU=n
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_RCU_BOOST=y
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_RCU_EXPERT=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE03.boot b/tools/testing/selftests/rcutorture/configs/rcu/TREE03.boot
new file mode 100644
index 000000000..8e50bfd4b
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE03.boot
@@ -0,0 +1,7 @@
+rcutorture.onoff_interval=200 rcutorture.onoff_holdoff=30
+rcutree.gp_preinit_delay=12
+rcutree.gp_init_delay=3
+rcutree.gp_cleanup_delay=3
+rcutree.kthread_prio=2
+threadirqs
+rcutree.use_softirq=0
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE04 b/tools/testing/selftests/rcutorture/configs/rcu/TREE04
new file mode 100644
index 000000000..ae395981b
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE04
@@ -0,0 +1,17 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=8
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=y
+CONFIG_PREEMPT=n
+CONFIG_PREEMPT_DYNAMIC=n
+#CHECK#CONFIG_TREE_RCU=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=n
+CONFIG_NO_HZ_FULL=y
+CONFIG_RCU_TRACE=y
+CONFIG_RCU_FANOUT=4
+CONFIG_RCU_FANOUT_LEAF=3
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_RCU_EXPERT=y
+CONFIG_RCU_EQS_DEBUG=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE04.boot b/tools/testing/selftests/rcutorture/configs/rcu/TREE04.boot
new file mode 100644
index 000000000..a8d94caf7
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE04.boot
@@ -0,0 +1 @@
+rcutree.rcu_fanout_leaf=4 nohz_full=1-N
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE05 b/tools/testing/selftests/rcutorture/configs/rcu/TREE05
new file mode 100644
index 000000000..9f48c7370
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE05
@@ -0,0 +1,20 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=8
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+#CHECK#CONFIG_TREE_RCU=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_RCU_TRACE=n
+CONFIG_HOTPLUG_CPU=y
+CONFIG_RCU_FANOUT=6
+CONFIG_RCU_FANOUT_LEAF=6
+CONFIG_RCU_NOCB_CPU=y
+CONFIG_DEBUG_LOCK_ALLOC=y
+CONFIG_PROVE_LOCKING=y
+#CHECK#CONFIG_PROVE_RCU=y
+CONFIG_PROVE_RCU_LIST=y
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_RCU_EXPERT=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE05.boot b/tools/testing/selftests/rcutorture/configs/rcu/TREE05.boot
new file mode 100644
index 000000000..c419cac23
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE05.boot
@@ -0,0 +1,4 @@
+rcutree.gp_preinit_delay=3
+rcutree.gp_init_delay=3
+rcutree.gp_cleanup_delay=3
+rcupdate.rcu_self_test=1
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE06 b/tools/testing/selftests/rcutorture/configs/rcu/TREE06
new file mode 100644
index 000000000..db27651de
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE06
@@ -0,0 +1,19 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=8
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+#CHECK#CONFIG_TREE_RCU=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_RCU_TRACE=n
+CONFIG_RCU_FANOUT=6
+CONFIG_RCU_FANOUT_LEAF=6
+CONFIG_RCU_NOCB_CPU=n
+CONFIG_DEBUG_LOCK_ALLOC=y
+CONFIG_PROVE_LOCKING=y
+#CHECK#CONFIG_PROVE_RCU=y
+CONFIG_DEBUG_OBJECTS=y
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=y
+CONFIG_RCU_EXPERT=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE06.boot b/tools/testing/selftests/rcutorture/configs/rcu/TREE06.boot
new file mode 100644
index 000000000..055f4aa79
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE06.boot
@@ -0,0 +1,5 @@
+rcupdate.rcu_self_test=1
+rcutree.rcu_fanout_exact=1
+rcutree.gp_preinit_delay=3
+rcutree.gp_init_delay=3
+rcutree.gp_cleanup_delay=3
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE07 b/tools/testing/selftests/rcutorture/configs/rcu/TREE07
new file mode 100644
index 000000000..d30922d8c
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE07
@@ -0,0 +1,17 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=16
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+CONFIG_PREEMPT_DYNAMIC=n
+#CHECK#CONFIG_TREE_RCU=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=n
+CONFIG_NO_HZ_FULL=y
+CONFIG_RCU_TRACE=y
+CONFIG_HOTPLUG_CPU=y
+CONFIG_RCU_FANOUT=2
+CONFIG_RCU_FANOUT_LEAF=2
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_RCU_EXPERT=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE07.boot b/tools/testing/selftests/rcutorture/configs/rcu/TREE07.boot
new file mode 100644
index 000000000..d44609937
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE07.boot
@@ -0,0 +1 @@
+nohz_full=2-9
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE08 b/tools/testing/selftests/rcutorture/configs/rcu/TREE08
new file mode 100644
index 000000000..8b561355b
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE08
@@ -0,0 +1,19 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=8
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
+#CHECK#CONFIG_PREEMPT_RCU=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_RCU_TRACE=n
+CONFIG_RCU_FANOUT=3
+CONFIG_RCU_FANOUT_LEAF=2
+CONFIG_RCU_NOCB_CPU=y
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_PROVE_LOCKING=n
+CONFIG_RCU_BOOST=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_RCU_EXPERT=y
+CONFIG_RCU_EQS_DEBUG=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE08.boot b/tools/testing/selftests/rcutorture/configs/rcu/TREE08.boot
new file mode 100644
index 000000000..94d38445d
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE08.boot
@@ -0,0 +1,3 @@
+rcupdate.rcu_self_test=1
+rcutree.rcu_fanout_exact=1
+rcu_nocbs=all
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE09 b/tools/testing/selftests/rcutorture/configs/rcu/TREE09
new file mode 100644
index 000000000..fc45645bb
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE09
@@ -0,0 +1,17 @@
+CONFIG_SMP=n
+CONFIG_NR_CPUS=1
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
+#CHECK#CONFIG_PREEMPT_RCU=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_RCU_TRACE=n
+CONFIG_RCU_NOCB_CPU=n
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_RCU_BOOST=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+#CHECK#CONFIG_RCU_EXPERT=n
+CONFIG_KPROBES=n
+CONFIG_FTRACE=n
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE10 b/tools/testing/selftests/rcutorture/configs/rcu/TREE10
new file mode 100644
index 000000000..a323d8948
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE10
@@ -0,0 +1,18 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=56
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+CONFIG_PREEMPT_DYNAMIC=n
+#CHECK#CONFIG_TREE_RCU=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_RCU_TRACE=n
+CONFIG_RCU_NOCB_CPU=n
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_PROVE_LOCKING=n
+#CHECK#CONFIG_PROVE_RCU=n
+CONFIG_DEBUG_OBJECTS=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_RCU_EXPERT=n
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE10.boot b/tools/testing/selftests/rcutorture/configs/rcu/TREE10.boot
new file mode 100644
index 000000000..dd914fa8f
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE10.boot
@@ -0,0 +1 @@
+rcutorture.fwd_progress=2
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TRIVIAL b/tools/testing/selftests/rcutorture/configs/rcu/TRIVIAL
new file mode 100644
index 000000000..5d546efa6
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TRIVIAL
@@ -0,0 +1,11 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=8
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_RCU_EXPERT=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TRIVIAL.boot b/tools/testing/selftests/rcutorture/configs/rcu/TRIVIAL.boot
new file mode 100644
index 000000000..7017f5f5a
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TRIVIAL.boot
@@ -0,0 +1,3 @@
+rcutorture.torture_type=trivial
+rcutorture.onoff_interval=0
+rcutorture.shuffle_interval=0
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/ver_functions.sh b/tools/testing/selftests/rcutorture/configs/rcu/ver_functions.sh
new file mode 100644
index 000000000..e2bc99c78
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcu/ver_functions.sh
@@ -0,0 +1,55 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Kernel-version-dependent shell functions for the rest of the scripts.
+#
+# Copyright (C) IBM Corporation, 2013
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+# rcutorture_param_n_barrier_cbs bootparam-string
+#
+# Adds n_barrier_cbs rcutorture module parameter if not already specified.
+rcutorture_param_n_barrier_cbs () {
+	if echo $1 | grep -q "rcutorture\.n_barrier_cbs"
+	then
+		:
+	else
+		echo rcutorture.n_barrier_cbs=4
+	fi
+}
+
+# rcutorture_param_onoff bootparam-string config-file
+#
+# Adds onoff rcutorture module parameters to kernels having it.
+rcutorture_param_onoff () {
+	if ! bootparam_hotplug_cpu "$1" && configfrag_hotplug_cpu "$2"
+	then
+		echo CPU-hotplug kernel, adding rcutorture onoff. 1>&2
+		echo rcutorture.onoff_interval=1000 rcutorture.onoff_holdoff=30
+	fi
+}
+
+# rcutorture_param_stat_interval bootparam-string
+#
+# Adds stat_interval rcutorture module parameter if not already specified.
+rcutorture_param_stat_interval () {
+	if echo $1 | grep -q "rcutorture\.stat_interval"
+	then
+		:
+	else
+		echo rcutorture.stat_interval=15
+	fi
+}
+
+# per_version_boot_params bootparam-string config-file seconds
+#
+# Adds per-version torture-module parameters to kernels supporting them.
+per_version_boot_params () {
+	echo $1 `rcutorture_param_onoff "$1" "$2"` \
+		`rcutorture_param_n_barrier_cbs "$1"` \
+		`rcutorture_param_stat_interval "$1"` \
+		rcutorture.shutdown_secs=$3 \
+		rcutorture.test_no_idle_hz=1 \
+		rcutorture.verbose=1
+}
diff --git a/tools/testing/selftests/rcutorture/configs/rcuscale/CFLIST b/tools/testing/selftests/rcutorture/configs/rcuscale/CFLIST
new file mode 100644
index 000000000..c9f56cf20
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcuscale/CFLIST
@@ -0,0 +1 @@
+TREE
diff --git a/tools/testing/selftests/rcutorture/configs/rcuscale/CFcommon b/tools/testing/selftests/rcutorture/configs/rcuscale/CFcommon
new file mode 100644
index 000000000..6a00157be
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcuscale/CFcommon
@@ -0,0 +1,6 @@
+CONFIG_RCU_SCALE_TEST=y
+CONFIG_PRINTK_TIME=y
+CONFIG_FORCE_TASKS_RCU=y
+#CHECK#CONFIG_TASKS_RCU=y
+CONFIG_FORCE_TASKS_TRACE_RCU=y
+#CHECK#CONFIG_TASKS_TRACE_RCU=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcuscale/TINY b/tools/testing/selftests/rcutorture/configs/rcuscale/TINY
new file mode 100644
index 000000000..0fa2dc086
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcuscale/TINY
@@ -0,0 +1,16 @@
+CONFIG_SMP=n
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+CONFIG_PREEMPT_DYNAMIC=n
+#CHECK#CONFIG_TINY_RCU=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_RCU_NOCB_CPU=n
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_PROVE_LOCKING=n
+CONFIG_RCU_BOOST=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_RCU_EXPERT=y
+CONFIG_RCU_TRACE=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcuscale/TRACE01 b/tools/testing/selftests/rcutorture/configs/rcuscale/TRACE01
new file mode 100644
index 000000000..227aba778
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcuscale/TRACE01
@@ -0,0 +1,14 @@
+CONFIG_SMP=y
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_RCU_NOCB_CPU=n
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_PROVE_LOCKING=n
+CONFIG_RCU_BOOST=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_RCU_EXPERT=y
+CONFIG_RCU_TRACE=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcuscale/TRACE01.boot b/tools/testing/selftests/rcutorture/configs/rcuscale/TRACE01.boot
new file mode 100644
index 000000000..af0aff145
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcuscale/TRACE01.boot
@@ -0,0 +1 @@
+rcuscale.scale_type=tasks-tracing
diff --git a/tools/testing/selftests/rcutorture/configs/rcuscale/TREE b/tools/testing/selftests/rcutorture/configs/rcuscale/TREE
new file mode 100644
index 000000000..b10706fd0
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcuscale/TREE
@@ -0,0 +1,20 @@
+CONFIG_SMP=y
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
+#CHECK#CONFIG_PREEMPT_RCU=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_HOTPLUG_CPU=y
+CONFIG_SUSPEND=n
+CONFIG_HIBERNATION=n
+CONFIG_RCU_NOCB_CPU=n
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_PROVE_LOCKING=n
+CONFIG_RCU_BOOST=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_RCU_EXPERT=y
+CONFIG_RCU_TRACE=y
+CONFIG_KPROBES=n
+CONFIG_FTRACE=n
diff --git a/tools/testing/selftests/rcutorture/configs/rcuscale/TREE54 b/tools/testing/selftests/rcutorture/configs/rcuscale/TREE54
new file mode 100644
index 000000000..9f83e5372
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcuscale/TREE54
@@ -0,0 +1,21 @@
+CONFIG_SMP=y
+CONFIG_NR_CPUS=54
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
+#CHECK#CONFIG_PREEMPT_RCU=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_HOTPLUG_CPU=y
+CONFIG_SUSPEND=n
+CONFIG_HIBERNATION=n
+CONFIG_RCU_FANOUT=3
+CONFIG_RCU_FANOUT_LEAF=2
+CONFIG_RCU_NOCB_CPU=n
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_PROVE_LOCKING=n
+CONFIG_RCU_BOOST=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_RCU_EXPERT=y
+CONFIG_RCU_TRACE=y
diff --git a/tools/testing/selftests/rcutorture/configs/rcuscale/ver_functions.sh b/tools/testing/selftests/rcutorture/configs/rcuscale/ver_functions.sh
new file mode 100644
index 000000000..ffbe15109
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/rcuscale/ver_functions.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Torture-suite-dependent shell functions for the rest of the scripts.
+#
+# Copyright (C) IBM Corporation, 2015
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+# per_version_boot_params bootparam-string config-file seconds
+#
+# Adds per-version torture-module parameters to kernels supporting them.
+per_version_boot_params () {
+	echo $1 rcuscale.shutdown=1 \
+		rcuscale.verbose=0
+}
diff --git a/tools/testing/selftests/rcutorture/configs/refscale/CFLIST b/tools/testing/selftests/rcutorture/configs/refscale/CFLIST
new file mode 100644
index 000000000..4d62eb4a3
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/refscale/CFLIST
@@ -0,0 +1,2 @@
+NOPREEMPT
+PREEMPT
diff --git a/tools/testing/selftests/rcutorture/configs/refscale/CFcommon b/tools/testing/selftests/rcutorture/configs/refscale/CFcommon
new file mode 100644
index 000000000..fbea3b13b
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/refscale/CFcommon
@@ -0,0 +1,6 @@
+CONFIG_RCU_REF_SCALE_TEST=y
+CONFIG_PRINTK_TIME=y
+CONFIG_FORCE_TASKS_RCU=y
+#CHECK#CONFIG_TASKS_RCU=y
+CONFIG_FORCE_TASKS_TRACE_RCU=y
+#CHECK#CONFIG_TASKS_TRACE_RCU=y
diff --git a/tools/testing/selftests/rcutorture/configs/refscale/NOPREEMPT b/tools/testing/selftests/rcutorture/configs/refscale/NOPREEMPT
new file mode 100644
index 000000000..ef2b501a6
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/refscale/NOPREEMPT
@@ -0,0 +1,19 @@
+CONFIG_SMP=y
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+#CHECK#CONFIG_PREEMPT_RCU=n
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_HOTPLUG_CPU=y
+CONFIG_SUSPEND=n
+CONFIG_HIBERNATION=n
+CONFIG_RCU_NOCB_CPU=n
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_PROVE_LOCKING=n
+CONFIG_RCU_BOOST=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_RCU_EXPERT=y
+CONFIG_KPROBES=n
+CONFIG_FTRACE=n
diff --git a/tools/testing/selftests/rcutorture/configs/refscale/PREEMPT b/tools/testing/selftests/rcutorture/configs/refscale/PREEMPT
new file mode 100644
index 000000000..52e3ef674
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/refscale/PREEMPT
@@ -0,0 +1,17 @@
+CONFIG_SMP=y
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
+#CHECK#CONFIG_PREEMPT_RCU=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_HOTPLUG_CPU=y
+CONFIG_SUSPEND=n
+CONFIG_HIBERNATION=n
+CONFIG_RCU_NOCB_CPU=n
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_PROVE_LOCKING=n
+CONFIG_RCU_BOOST=n
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
+CONFIG_RCU_EXPERT=y
diff --git a/tools/testing/selftests/rcutorture/configs/refscale/ver_functions.sh b/tools/testing/selftests/rcutorture/configs/refscale/ver_functions.sh
new file mode 100644
index 000000000..f81fa2c54
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/refscale/ver_functions.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Torture-suite-dependent shell functions for the rest of the scripts.
+#
+# Copyright (C) IBM Corporation, 2015
+#
+# Authors: Paul E. McKenney <paulmck@linux.ibm.com>
+
+# per_version_boot_params bootparam-string config-file seconds
+#
+# Adds per-version torture-module parameters to kernels supporting them.
+per_version_boot_params () {
+	echo $1 refscale.shutdown=1 \
+		refscale.verbose=0
+}
diff --git a/tools/testing/selftests/rcutorture/configs/scf/CFLIST b/tools/testing/selftests/rcutorture/configs/scf/CFLIST
new file mode 100644
index 000000000..4d62eb4a3
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/scf/CFLIST
@@ -0,0 +1,2 @@
+NOPREEMPT
+PREEMPT
diff --git a/tools/testing/selftests/rcutorture/configs/scf/CFcommon b/tools/testing/selftests/rcutorture/configs/scf/CFcommon
new file mode 100644
index 000000000..c11ab91f4
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/scf/CFcommon
@@ -0,0 +1,2 @@
+CONFIG_SCF_TORTURE_TEST=y
+CONFIG_PRINTK_TIME=y
diff --git a/tools/testing/selftests/rcutorture/configs/scf/NOPREEMPT b/tools/testing/selftests/rcutorture/configs/scf/NOPREEMPT
new file mode 100644
index 000000000..3a59346b3
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/scf/NOPREEMPT
@@ -0,0 +1,11 @@
+CONFIG_SMP=y
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=n
+CONFIG_NO_HZ_FULL=y
+CONFIG_DEBUG_LOCK_ALLOC=n
+CONFIG_PROVE_LOCKING=n
+CONFIG_KPROBES=n
+CONFIG_FTRACE=n
diff --git a/tools/testing/selftests/rcutorture/configs/scf/NOPREEMPT.boot b/tools/testing/selftests/rcutorture/configs/scf/NOPREEMPT.boot
new file mode 100644
index 000000000..d6a7fa097
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/scf/NOPREEMPT.boot
@@ -0,0 +1 @@
+nohz_full=1
diff --git a/tools/testing/selftests/rcutorture/configs/scf/PREEMPT b/tools/testing/selftests/rcutorture/configs/scf/PREEMPT
new file mode 100644
index 000000000..cb37e0803
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/scf/PREEMPT
@@ -0,0 +1,10 @@
+CONFIG_SMP=y
+CONFIG_PREEMPT_NONE=n
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=y
+CONFIG_HZ_PERIODIC=n
+CONFIG_NO_HZ_IDLE=y
+CONFIG_NO_HZ_FULL=n
+CONFIG_DEBUG_LOCK_ALLOC=y
+CONFIG_PROVE_LOCKING=y
+CONFIG_RCU_EXPERT=y
diff --git a/tools/testing/selftests/rcutorture/configs/scf/ver_functions.sh b/tools/testing/selftests/rcutorture/configs/scf/ver_functions.sh
new file mode 100644
index 000000000..2d949e58f
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/configs/scf/ver_functions.sh
@@ -0,0 +1,29 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Torture-suite-dependent shell functions for the rest of the scripts.
+#
+# Copyright (C) Facebook, 2020
+#
+# Authors: Paul E. McKenney <paulmck@kernel.org>
+
+# scftorture_param_onoff bootparam-string config-file
+#
+# Adds onoff scftorture module parameters to kernels having it.
+scftorture_param_onoff () {
+	if ! bootparam_hotplug_cpu "$1" && configfrag_hotplug_cpu "$2"
+	then
+		echo CPU-hotplug kernel, adding scftorture onoff. 1>&2
+		echo scftorture.onoff_interval=1000 scftorture.onoff_holdoff=30
+	fi
+}
+
+# per_version_boot_params bootparam-string config-file seconds
+#
+# Adds per-version torture-module parameters to kernels supporting them.
+per_version_boot_params () {
+	echo $1 `scftorture_param_onoff "$1" "$2"` \
+		scftorture.stat_interval=15 \
+		scftorture.shutdown_secs=$3 \
+		scftorture.verbose=1
+}
diff --git a/tools/testing/selftests/rcutorture/doc/TINY_RCU.txt b/tools/testing/selftests/rcutorture/doc/TINY_RCU.txt
new file mode 100644
index 000000000..a75b16991
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/doc/TINY_RCU.txt
@@ -0,0 +1,38 @@
+This document gives a brief rationale for the TINY_RCU test cases.
+
+
+Kconfig Parameters:
+
+CONFIG_DEBUG_LOCK_ALLOC -- Do all three and none of the three.
+CONFIG_PREEMPT_COUNT
+CONFIG_RCU_TRACE
+
+The theory here is that randconfig testing will hit the other six possible
+combinations of these parameters.
+
+
+Kconfig Parameters Ignored:
+
+CONFIG_DEBUG_OBJECTS_RCU_HEAD
+CONFIG_PROVE_RCU
+
+	In common code tested by TREE_RCU test cases.
+
+CONFIG_RCU_NOCB_CPU
+
+	Meaningless for TINY_RCU.
+
+CONFIG_RCU_STALL_COMMON
+CONFIG_RCU_TORTURE_TEST
+
+	Redundant with CONFIG_RCU_TRACE.
+
+CONFIG_HOTPLUG_CPU
+CONFIG_PREEMPT
+CONFIG_PREEMPT_RCU
+CONFIG_SMP
+CONFIG_TINY_RCU
+CONFIG_PREEMPT_RCU
+CONFIG_TREE_RCU
+
+	All forced by CONFIG_TINY_RCU.
diff --git a/tools/testing/selftests/rcutorture/doc/TREE_RCU-kconfig.txt b/tools/testing/selftests/rcutorture/doc/TREE_RCU-kconfig.txt
new file mode 100644
index 000000000..42acb1a64
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/doc/TREE_RCU-kconfig.txt
@@ -0,0 +1,79 @@
+This document gives a brief rationale for the TREE_RCU-related test
+cases, a group that includes PREEMPT_RCU.
+
+
+Kconfig Parameters:
+
+CONFIG_DEBUG_LOCK_ALLOC -- Do three, covering CONFIG_PROVE_LOCKING & not.
+CONFIG_DEBUG_OBJECTS_RCU_HEAD -- Do one.
+CONFIG_HZ_PERIODIC -- Do one.
+CONFIG_NO_HZ_IDLE -- Do those not otherwise specified. (Groups of two.)
+CONFIG_NO_HZ_FULL -- Do two, one with partial CPU enablement.
+CONFIG_PREEMPT -- Do half.  (First three and #8.)
+CONFIG_PROVE_LOCKING -- Do several, covering CONFIG_DEBUG_LOCK_ALLOC=y and not.
+CONFIG_PROVE_RCU -- Hardwired to CONFIG_PROVE_LOCKING.
+CONFIG_RCU_BOOST -- one of PREEMPT_RCU.
+CONFIG_RCU_FANOUT -- Cover hierarchy, but overlap with others.
+CONFIG_RCU_FANOUT_LEAF -- Do one non-default.
+CONFIG_RCU_NOCB_CPU -- Do three, one with no rcu_nocbs CPUs, one with
+	rcu_nocbs=0, and one with all rcu_nocbs CPUs.
+CONFIG_RCU_TRACE -- Do half.
+CONFIG_SMP -- Need one !SMP for PREEMPT_RCU.
+CONFIG_RCU_EXPERT=n -- Do a few, but these have to be vanilla configurations.
+CONFIG_RCU_EQS_DEBUG -- Do at least one for CONFIG_NO_HZ_FULL and not.
+
+RCU-bh: Do one with PREEMPT and one with !PREEMPT.
+RCU-sched: Do one with PREEMPT but not BOOST.
+
+
+Boot parameters:
+
+nohz_full - do at least one.
+maxcpu -- do at least one.
+rcupdate.rcu_self_test_bh -- Do at least one each, offloaded and not.
+rcupdate.rcu_self_test_sched -- Do at least one each, offloaded and not.
+rcupdate.rcu_self_test -- Do at least one each, offloaded and not.
+rcutree.rcu_fanout_exact -- Do at least one.
+
+
+Kconfig Parameters Ignored:
+
+CONFIG_64BIT
+
+	Used only to check CONFIG_RCU_FANOUT value, inspection suffices.
+
+CONFIG_PREEMPT_COUNT
+CONFIG_PREEMPT_RCU
+
+	Redundant with CONFIG_PREEMPT, ignore.
+
+CONFIG_RCU_BOOST_DELAY
+
+	Inspection suffices, ignore.
+
+CONFIG_RCU_CPU_STALL_TIMEOUT
+
+	Inspection suffices, ignore.
+
+CONFIG_RCU_STALL_COMMON
+
+	Implied by TREE_RCU and PREEMPT_RCU.
+
+CONFIG_RCU_TORTURE_TEST
+CONFIG_RCU_TORTURE_TEST_RUNNABLE
+
+	Always used in KVM testing.
+
+CONFIG_PREEMPT_RCU
+CONFIG_TREE_RCU
+CONFIG_TINY_RCU
+CONFIG_TASKS_RCU
+
+	These are controlled by CONFIG_PREEMPT and/or CONFIG_SMP.
+
+CONFIG_SRCU
+
+	Selected by CONFIG_RCU_TORTURE_TEST, so cannot disable.
+
+
+boot parameters ignored: TBD
diff --git a/tools/testing/selftests/rcutorture/doc/initrd.txt b/tools/testing/selftests/rcutorture/doc/initrd.txt
new file mode 100644
index 000000000..41a425586
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/doc/initrd.txt
@@ -0,0 +1,16 @@
+The rcutorture scripting tools automatically create an initrd containing
+a single statically linked binary named "init" that loops over a
+very long sleep() call.  In both cases, this creation is done by
+tools/testing/selftests/rcutorture/bin/mkinitrd.sh.
+
+However, if you don't like the notion of statically linked bare-bones
+userspace environments, you might wish to press an existing initrd
+into service:
+
+------------------------------------------------------------------------
+cd tools/testing/selftests/rcutorture
+zcat /initrd.img > /tmp/initrd.img.zcat
+mkdir initrd
+cd initrd
+cpio -id < /tmp/initrd.img.zcat
+# Manually verify that initrd contains needed binaries and libraries.
diff --git a/tools/testing/selftests/rcutorture/doc/rcu-test-image.txt b/tools/testing/selftests/rcutorture/doc/rcu-test-image.txt
new file mode 100644
index 000000000..b2fc24797
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/doc/rcu-test-image.txt
@@ -0,0 +1,67 @@
+Normally, a minimal initrd is created automatically by the rcutorture
+scripting.  But minimal really does mean "minimal", namely just a single
+root directory with a single statically linked executable named "init":
+
+$ size tools/testing/selftests/rcutorture/initrd/init
+   text    data     bss     dec     hex filename
+    328       0       8     336     150 tools/testing/selftests/rcutorture/initrd/init
+
+Suppose you need to run some scripts, perhaps to monitor or control
+some aspect of the rcutorture testing.  This will require a more fully
+filled-out userspace, perhaps containing libraries, executables for
+the shell and other utilities, and soforth.  In that case, place your
+desired filesystem here:
+
+	tools/testing/selftests/rcutorture/initrd
+
+For example, your tools/testing/selftests/rcutorture/initrd/init might
+be a script that does any needed mount operations and starts whatever
+scripts need starting to properly monitor or control your testing.
+The next rcutorture build will then incorporate this filesystem into
+the kernel image that is passed to qemu.
+
+Or maybe you need a real root filesystem for some reason, in which case
+please read on!
+
+The remainder of this document describes one way to create the
+rcu-test-image file that contains the filesystem used by the guest-OS
+kernel.  There are probably much better ways of doing this, and this
+filesystem could no doubt be smaller.  It is probably also possible to
+simply download an appropriate image from any number of places.
+
+That said, here are the commands:
+
+------------------------------------------------------------------------
+dd if=/dev/zero of=rcu-test-image bs=400M count=1
+mkfs.ext3 ./rcu-test-image
+sudo mount -o loop ./rcu-test-image /mnt
+
+# Replace "precise" below with your favorite Ubuntu release.
+# Empirical evidence says this image will work for 64-bit, but...
+# Note that debootstrap does take a few minutes to run.  Or longer.
+sudo debootstrap --verbose --arch i386 precise /mnt http://archive.ubuntu.com/ubuntu
+cat << '___EOF___' | sudo dd of=/mnt/etc/fstab
+# UNCONFIGURED FSTAB FOR BASE SYSTEM
+#
+/dev/vda        /               ext3    defaults        1 1
+dev             /dev            tmpfs   rw              0 0
+tmpfs           /dev/shm        tmpfs   defaults        0 0
+devpts          /dev/pts        devpts  gid=5,mode=620  0 0
+sysfs           /sys            sysfs   defaults        0 0
+proc            /proc           proc    defaults        0 0
+___EOF___
+sudo umount /mnt
+------------------------------------------------------------------------
+
+
+References:
+
+	http://sripathikodi.blogspot.com/2010/02/creating-kvm-bootable-fedora-system.html
+	https://help.ubuntu.com/community/KVM/CreateGuests
+	https://help.ubuntu.com/community/JeOSVMBuilder
+	http://wiki.libvirt.org/page/UbuntuKVMWalkthrough
+	http://www.moe.co.uk/2011/01/07/pci_add_option_rom-failed-to-find-romfile-pxe-rtl8139-bin/ -- "apt-get install kvm-pxe"
+	https://www.landley.net/writing/rootfs-howto.html
+	https://en.wikipedia.org/wiki/Initrd
+	https://en.wikipedia.org/wiki/Cpio
+	http://wiki.libvirt.org/page/UbuntuKVMWalkthrough
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/.gitignore b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/.gitignore
new file mode 100644
index 000000000..24e27957e
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/.gitignore
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+srcu.c
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/Makefile b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/Makefile
new file mode 100644
index 000000000..4bed0b678
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/Makefile
@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: GPL-2.0
+all: srcu.c store_buffering
+
+LINUX_SOURCE = ../../../../../..
+
+modified_srcu_input = $(LINUX_SOURCE)/include/linux/srcu.h \
+		      $(LINUX_SOURCE)/kernel/rcu/srcu.c
+
+modified_srcu_output = include/linux/srcu.h srcu.c
+
+include/linux/srcu.h: srcu.c
+
+srcu.c: modify_srcu.awk Makefile $(modified_srcu_input)
+	awk -f modify_srcu.awk $(modified_srcu_input) $(modified_srcu_output)
+
+store_buffering:
+	@cd tests/store_buffering; make
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/delay.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/delay.h
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/delay.h
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/export.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/export.h
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/export.h
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/mutex.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/mutex.h
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/mutex.h
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/percpu.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/percpu.h
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/percpu.h
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/preempt.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/preempt.h
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/preempt.h
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/rcupdate.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/rcupdate.h
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/rcupdate.h
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/sched.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/sched.h
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/sched.h
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/smp.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/smp.h
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/smp.h
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/workqueue.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/workqueue.h
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/linux/workqueue.h
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/uapi/linux/types.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/uapi/linux/types.h
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/empty_includes/uapi/linux/types.h
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/include/linux/.gitignore b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/include/linux/.gitignore
new file mode 100644
index 000000000..57d296341
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/include/linux/.gitignore
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+srcu.h
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/include/linux/kconfig.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/include/linux/kconfig.h
new file mode 100644
index 000000000..f2860dd1b
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/include/linux/kconfig.h
@@ -0,0 +1 @@
+#include <LINUX_SOURCE/linux/kconfig.h>
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/include/linux/types.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/include/linux/types.h
new file mode 100644
index 000000000..8bc960e5e
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/include/linux/types.h
@@ -0,0 +1,152 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * This header has been modifies to remove definitions of types that
+ * are defined in standard userspace headers or are problematic for some
+ * other reason.
+ */
+
+#ifndef _LINUX_TYPES_H
+#define _LINUX_TYPES_H
+
+#define __EXPORTED_HEADERS__
+#include <uapi/linux/types.h>
+
+#ifndef __ASSEMBLY__
+
+#define DECLARE_BITMAP(name, bits) \
+	unsigned long name[BITS_TO_LONGS(bits)]
+
+typedef __u32 __kernel_dev_t;
+
+/* bsd */
+typedef unsigned char		u_char;
+typedef unsigned short		u_short;
+typedef unsigned int		u_int;
+typedef unsigned long		u_long;
+
+/* sysv */
+typedef unsigned char		unchar;
+typedef unsigned short		ushort;
+typedef unsigned int		uint;
+typedef unsigned long		ulong;
+
+#ifndef __BIT_TYPES_DEFINED__
+#define __BIT_TYPES_DEFINED__
+
+typedef		__u8		u_int8_t;
+typedef		__s8		int8_t;
+typedef		__u16		u_int16_t;
+typedef		__s16		int16_t;
+typedef		__u32		u_int32_t;
+typedef		__s32		int32_t;
+
+#endif /* !(__BIT_TYPES_DEFINED__) */
+
+typedef		__u8		uint8_t;
+typedef		__u16		uint16_t;
+typedef		__u32		uint32_t;
+
+/* this is a special 64bit data type that is 8-byte aligned */
+#define aligned_u64 __u64 __attribute__((aligned(8)))
+#define aligned_be64 __be64 __attribute__((aligned(8)))
+#define aligned_le64 __le64 __attribute__((aligned(8)))
+
+/**
+ * The type used for indexing onto a disc or disc partition.
+ *
+ * Linux always considers sectors to be 512 bytes long independently
+ * of the devices real block size.
+ *
+ * blkcnt_t is the type of the inode's block count.
+ */
+typedef u64 sector_t;
+
+/*
+ * The type of an index into the pagecache.
+ */
+#define pgoff_t unsigned long
+
+/*
+ * A dma_addr_t can hold any valid DMA address, i.e., any address returned
+ * by the DMA API.
+ *
+ * If the DMA API only uses 32-bit addresses, dma_addr_t need only be 32
+ * bits wide.  Bus addresses, e.g., PCI BARs, may be wider than 32 bits,
+ * but drivers do memory-mapped I/O to ioremapped kernel virtual addresses,
+ * so they don't care about the size of the actual bus addresses.
+ */
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+typedef u64 dma_addr_t;
+#else
+typedef u32 dma_addr_t;
+#endif
+
+#ifdef CONFIG_PHYS_ADDR_T_64BIT
+typedef u64 phys_addr_t;
+#else
+typedef u32 phys_addr_t;
+#endif
+
+typedef phys_addr_t resource_size_t;
+
+/*
+ * This type is the placeholder for a hardware interrupt number. It has to be
+ * big enough to enclose whatever representation is used by a given platform.
+ */
+typedef unsigned long irq_hw_number_t;
+
+typedef struct {
+	int counter;
+} atomic_t;
+
+#ifdef CONFIG_64BIT
+typedef struct {
+	long counter;
+} atomic64_t;
+#endif
+
+struct list_head {
+	struct list_head *next, *prev;
+};
+
+struct hlist_head {
+	struct hlist_node *first;
+};
+
+struct hlist_node {
+	struct hlist_node *next, **pprev;
+};
+
+/**
+ * struct callback_head - callback structure for use with RCU and task_work
+ * @next: next update requests in a list
+ * @func: actual update function to call after the grace period.
+ *
+ * The struct is aligned to size of pointer. On most architectures it happens
+ * naturally due ABI requirements, but some architectures (like CRIS) have
+ * weird ABI and we need to ask it explicitly.
+ *
+ * The alignment is required to guarantee that bits 0 and 1 of @next will be
+ * clear under normal conditions -- as long as we use call_rcu() or
+ * call_srcu() to queue callback.
+ *
+ * This guarantee is important for few reasons:
+ *  - future call_rcu_lazy() will make use of lower bits in the pointer;
+ *  - the structure shares storage spacer in struct page with @compound_head,
+ *    which encode PageTail() in bit 0. The guarantee is needed to avoid
+ *    false-positive PageTail().
+ */
+struct callback_head {
+	struct callback_head *next;
+	void (*func)(struct callback_head *head);
+} __attribute__((aligned(sizeof(void *))));
+#define rcu_head callback_head
+
+typedef void (*rcu_callback_t)(struct rcu_head *head);
+typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func);
+
+/* clocksource cycle base type */
+typedef u64 cycle_t;
+
+#endif /*  __ASSEMBLY__ */
+#endif /* _LINUX_TYPES_H */
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/modify_srcu.awk b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/modify_srcu.awk
new file mode 100755
index 000000000..e05182d3e
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/modify_srcu.awk
@@ -0,0 +1,376 @@
+#!/usr/bin/awk -f
+# SPDX-License-Identifier: GPL-2.0
+
+# Modify SRCU for formal verification. The first argument should be srcu.h and
+# the second should be srcu.c. Outputs modified srcu.h and srcu.c into the
+# current directory.
+
+BEGIN {
+	if (ARGC != 5) {
+		print "Usange: input.h input.c output.h output.c" > "/dev/stderr";
+		exit 1;
+	}
+	h_output = ARGV[3];
+	c_output = ARGV[4];
+	ARGC = 3;
+
+	# Tokenize using FS and not RS as FS supports regular expressions. Each
+	# record is one line of source, except that backslashed lines are
+	# combined. Comments are treated as field separators, as are quotes.
+	quote_regexp="\"([^\\\\\"]|\\\\.)*\"";
+	comment_regexp="\\/\\*([^*]|\\*+[^*/])*\\*\\/|\\/\\/.*(\n|$)";
+	FS="([ \\\\\t\n\v\f;,.=(){}+*/<>&|^-]|\\[|\\]|" comment_regexp "|" quote_regexp ")+";
+
+	inside_srcu_struct = 0;
+	inside_srcu_init_def = 0;
+	srcu_init_param_name = "";
+	in_macro = 0;
+	brace_nesting = 0;
+	paren_nesting = 0;
+
+	# Allow the manipulation of the last field separator after has been
+	# seen.
+	last_fs = "";
+	# Whether the last field separator was intended to be output.
+	last_fs_print = 0;
+
+	# rcu_batches stores the initialization for each instance of struct
+	# rcu_batch
+
+	in_comment = 0;
+
+	outputfile = "";
+}
+
+{
+	prev_outputfile = outputfile;
+	if (FILENAME ~ /\.h$/) {
+		outputfile = h_output;
+		if (FNR != NR) {
+			print "Incorrect file order" > "/dev/stderr";
+			exit 1;
+		}
+	}
+	else
+		outputfile = c_output;
+
+	if (prev_outputfile && outputfile != prev_outputfile) {
+		new_outputfile = outputfile;
+		outputfile = prev_outputfile;
+		update_fieldsep("", 0);
+		outputfile = new_outputfile;
+	}
+}
+
+# Combine the next line into $0.
+function combine_line() {
+	ret = getline next_line;
+	if (ret == 0) {
+		# Don't allow two consecutive getlines at the end of the file
+		if (eof_found) {
+			print "Error: expected more input." > "/dev/stderr";
+			exit 1;
+		} else {
+			eof_found = 1;
+		}
+	} else if (ret == -1) {
+		print "Error reading next line of file" FILENAME > "/dev/stderr";
+		exit 1;
+	}
+	$0 = $0 "\n" next_line;
+}
+
+# Combine backslashed lines and multiline comments.
+function combine_backslashes() {
+	while (/\\$|\/\*([^*]|\*+[^*\/])*\**$/) {
+		combine_line();
+	}
+}
+
+function read_line() {
+	combine_line();
+	combine_backslashes();
+}
+
+# Print out field separators and update variables that depend on them. Only
+# print if p is true. Call with sep="" and p=0 to print out the last field
+# separator.
+function update_fieldsep(sep, p) {
+	# Count braces
+	sep_tmp = sep;
+	gsub(quote_regexp "|" comment_regexp, "", sep_tmp);
+	while (1)
+	{
+		if (sub("[^{}()]*\\{", "", sep_tmp)) {
+			brace_nesting++;
+			continue;
+		}
+		if (sub("[^{}()]*\\}", "", sep_tmp)) {
+			brace_nesting--;
+			if (brace_nesting < 0) {
+				print "Unbalanced braces!" > "/dev/stderr";
+				exit 1;
+			}
+			continue;
+		}
+		if (sub("[^{}()]*\\(", "", sep_tmp)) {
+			paren_nesting++;
+			continue;
+		}
+		if (sub("[^{}()]*\\)", "", sep_tmp)) {
+			paren_nesting--;
+			if (paren_nesting < 0) {
+				print "Unbalanced parenthesis!" > "/dev/stderr";
+				exit 1;
+			}
+			continue;
+		}
+
+		break;
+	}
+
+	if (last_fs_print)
+		printf("%s", last_fs) > outputfile;
+	last_fs = sep;
+	last_fs_print = p;
+}
+
+# Shifts the fields down by n positions. Calls next if there are no more. If p
+# is true then print out field separators.
+function shift_fields(n, p) {
+	do {
+		if (match($0, FS) > 0) {
+			update_fieldsep(substr($0, RSTART, RLENGTH), p);
+			if (RSTART + RLENGTH <= length())
+				$0 = substr($0, RSTART + RLENGTH);
+			else
+				$0 = "";
+		} else {
+			update_fieldsep("", 0);
+			print "" > outputfile;
+			next;
+		}
+	} while (--n > 0);
+}
+
+# Shifts and prints the first n fields.
+function print_fields(n) {
+	do {
+		update_fieldsep("", 0);
+		printf("%s", $1) > outputfile;
+		shift_fields(1, 1);
+	} while (--n > 0);
+}
+
+{
+	combine_backslashes();
+}
+
+# Print leading FS
+{
+	if (match($0, "^(" FS ")+") > 0) {
+		update_fieldsep(substr($0, RSTART, RLENGTH), 1);
+		if (RSTART + RLENGTH <= length())
+			$0 = substr($0, RSTART + RLENGTH);
+		else
+			$0 = "";
+	}
+}
+
+# Parse the line.
+{
+	while (NF > 0) {
+		if ($1 == "struct" && NF < 3) {
+			read_line();
+			continue;
+		}
+
+		if (FILENAME ~ /\.h$/ && !inside_srcu_struct &&
+		    brace_nesting == 0 && paren_nesting == 0 &&
+		    $1 == "struct" && $2 == "srcu_struct" &&
+		    $0 ~ "^struct(" FS ")+srcu_struct(" FS ")+\\{") {
+			inside_srcu_struct = 1;
+			print_fields(2);
+			continue;
+		}
+		if (inside_srcu_struct && brace_nesting == 0 &&
+		    paren_nesting == 0) {
+			inside_srcu_struct = 0;
+			update_fieldsep("", 0);
+			for (name in rcu_batches)
+				print "extern struct rcu_batch " name ";" > outputfile;
+		}
+
+		if (inside_srcu_struct && $1 == "struct" && $2 == "rcu_batch") {
+			# Move rcu_batches outside of the struct.
+			rcu_batches[$3] = "";
+			shift_fields(3, 1);
+			sub(/;[[:space:]]*$/, "", last_fs);
+			continue;
+		}
+
+		if (FILENAME ~ /\.h$/ && !inside_srcu_init_def &&
+		    $1 == "#define" && $2 == "__SRCU_STRUCT_INIT") {
+			inside_srcu_init_def = 1;
+			srcu_init_param_name = $3;
+			in_macro = 1;
+			print_fields(3);
+			continue;
+		}
+		if (inside_srcu_init_def && brace_nesting == 0 &&
+		    paren_nesting == 0) {
+			inside_srcu_init_def = 0;
+			in_macro = 0;
+			continue;
+		}
+
+		if (inside_srcu_init_def && brace_nesting == 1 &&
+		    paren_nesting == 0 && last_fs ~ /\.[[:space:]]*$/ &&
+		    $1 ~ /^[[:alnum:]_]+$/) {
+			name = $1;
+			if (name in rcu_batches) {
+				# Remove the dot.
+				sub(/\.[[:space:]]*$/, "", last_fs);
+
+				old_record = $0;
+				do
+					shift_fields(1, 0);
+				while (last_fs !~ /,/ || paren_nesting > 0);
+				end_loc = length(old_record) - length($0);
+				end_loc += index(last_fs, ",") - length(last_fs);
+
+				last_fs = substr(last_fs, index(last_fs, ",") + 1);
+				last_fs_print = 1;
+
+				match(old_record, "^"name"("FS")+=");
+				start_loc = RSTART + RLENGTH;
+
+				len = end_loc - start_loc;
+				initializer = substr(old_record, start_loc, len);
+				gsub(srcu_init_param_name "\\.", "", initializer);
+				rcu_batches[name] = initializer;
+				continue;
+			}
+		}
+
+		# Don't include a nonexistent file
+		if (!in_macro && $1 == "#include" && /^#include[[:space:]]+"rcu\.h"/) {
+			update_fieldsep("", 0);
+			next;
+		}
+
+		# Ignore most preprocessor stuff.
+		if (!in_macro && $1 ~ /#/) {
+			break;
+		}
+
+		if (brace_nesting > 0 && $1 ~ "^[[:alnum:]_]+$" && NF < 2) {
+			read_line();
+			continue;
+		}
+		if (brace_nesting > 0 &&
+		    $0 ~ "^[[:alnum:]_]+[[:space:]]*(\\.|->)[[:space:]]*[[:alnum:]_]+" &&
+		    $2 in rcu_batches) {
+			# Make uses of rcu_batches global. Somewhat unreliable.
+			shift_fields(1, 0);
+			print_fields(1);
+			continue;
+		}
+
+		if ($1 == "static" && NF < 3) {
+			read_line();
+			continue;
+		}
+		if ($1 == "static" && ($2 == "bool" && $3 == "try_check_zero" ||
+		                       $2 == "void" && $3 == "srcu_flip")) {
+			shift_fields(1, 1);
+			print_fields(2);
+			continue;
+		}
+
+		# Distinguish between read-side and write-side memory barriers.
+		if ($1 == "smp_mb" && NF < 2) {
+			read_line();
+			continue;
+		}
+		if (match($0, /^smp_mb[[:space:]();\/*]*[[:alnum:]]/)) {
+			barrier_letter = substr($0, RLENGTH, 1);
+			if (barrier_letter ~ /A|D/)
+				new_barrier_name = "sync_smp_mb";
+			else if (barrier_letter ~ /B|C/)
+				new_barrier_name = "rs_smp_mb";
+			else {
+				print "Unrecognized memory barrier." > "/dev/null";
+				exit 1;
+			}
+
+			shift_fields(1, 1);
+			printf("%s", new_barrier_name) > outputfile;
+			continue;
+		}
+
+		# Skip definition of rcu_synchronize, since it is already
+		# defined in misc.h. Only present in old versions of srcu.
+		if (brace_nesting == 0 && paren_nesting == 0 &&
+		    $1 == "struct" && $2 == "rcu_synchronize" &&
+		    $0 ~ "^struct(" FS ")+rcu_synchronize(" FS ")+\\{") {
+			shift_fields(2, 0);
+			while (brace_nesting) {
+				if (NF < 2)
+					read_line();
+				shift_fields(1, 0);
+			}
+		}
+
+		# Skip definition of wakeme_after_rcu for the same reason
+		if (brace_nesting == 0 && $1 == "static" && $2 == "void" &&
+		    $3 == "wakeme_after_rcu") {
+			while (NF < 5)
+				read_line();
+			shift_fields(3, 0);
+			do {
+				while (NF < 3)
+					read_line();
+				shift_fields(1, 0);
+			} while (paren_nesting || brace_nesting);
+		}
+
+		if ($1 ~ /^(unsigned|long)$/ && NF < 3) {
+			read_line();
+			continue;
+		}
+
+		# Give srcu_batches_completed the correct type for old SRCU.
+		if (brace_nesting == 0 && $1 == "long" &&
+		    $2 == "srcu_batches_completed") {
+			update_fieldsep("", 0);
+			printf("unsigned ") > outputfile;
+			print_fields(2);
+			continue;
+		}
+		if (brace_nesting == 0 && $1 == "unsigned" && $2 == "long" &&
+		    $3 == "srcu_batches_completed") {
+			print_fields(3);
+			continue;
+		}
+
+		# Just print out the input code by default.
+		print_fields(1);
+	}
+	update_fieldsep("", 0);
+	print > outputfile;
+	next;
+}
+
+END {
+	update_fieldsep("", 0);
+
+	if (brace_nesting != 0) {
+		print "Unbalanced braces!" > "/dev/stderr";
+		exit 1;
+	}
+
+	# Define the rcu_batches
+	for (name in rcu_batches)
+		print "struct rcu_batch " name " = " rcu_batches[name] ";" > c_output;
+}
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/assume.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/assume.h
new file mode 100644
index 000000000..570a49d9d
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/assume.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef ASSUME_H
+#define ASSUME_H
+
+/* Provide an assumption macro that can be disabled for gcc. */
+#ifdef RUN
+#define assume(x) \
+	do { \
+		/* Evaluate x to suppress warnings. */ \
+		(void) (x); \
+	} while (0)
+
+#else
+#define assume(x) __CPROVER_assume(x)
+#endif
+
+#endif
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/barriers.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/barriers.h
new file mode 100644
index 000000000..3f95a768a
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/barriers.h
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef BARRIERS_H
+#define BARRIERS_H
+
+#define barrier() __asm__ __volatile__("" : : : "memory")
+
+#ifdef RUN
+#define smp_mb() __sync_synchronize()
+#define smp_mb__after_unlock_lock() __sync_synchronize()
+#else
+/*
+ * Copied from CBMC's implementation of __sync_synchronize(), which
+ * seems to be disabled by default.
+ */
+#define smp_mb() __CPROVER_fence("WWfence", "RRfence", "RWfence", "WRfence", \
+				 "WWcumul", "RRcumul", "RWcumul", "WRcumul")
+#define smp_mb__after_unlock_lock() __CPROVER_fence("WWfence", "RRfence", "RWfence", "WRfence", \
+				    "WWcumul", "RRcumul", "RWcumul", "WRcumul")
+#endif
+
+/*
+ * Allow memory barriers to be disabled in either the read or write side
+ * of SRCU individually.
+ */
+
+#ifndef NO_SYNC_SMP_MB
+#define sync_smp_mb() smp_mb()
+#else
+#define sync_smp_mb() do {} while (0)
+#endif
+
+#ifndef NO_READ_SIDE_SMP_MB
+#define rs_smp_mb() smp_mb()
+#else
+#define rs_smp_mb() do {} while (0)
+#endif
+
+#define READ_ONCE(x) (*(volatile typeof(x) *) &(x))
+#define WRITE_ONCE(x) ((*(volatile typeof(x) *) &(x)) = (val))
+
+#endif
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/bug_on.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/bug_on.h
new file mode 100644
index 000000000..5e7912c6a
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/bug_on.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef BUG_ON_H
+#define BUG_ON_H
+
+#include <assert.h>
+
+#define BUG() assert(0)
+#define BUG_ON(x) assert(!(x))
+
+/* Does it make sense to treat warnings as errors? */
+#define WARN() BUG()
+#define WARN_ON(x) (BUG_ON(x), false)
+
+#endif
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/combined_source.c b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/combined_source.c
new file mode 100644
index 000000000..e67ee5b3d
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/combined_source.c
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <config.h>
+
+/* Include all source files. */
+
+#include "include_srcu.c"
+
+#include "preempt.c"
+#include "misc.c"
+
+/* Used by test.c files */
+#include <pthread.h>
+#include <stdlib.h>
+#include <linux/srcu.h>
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/config.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/config.h
new file mode 100644
index 000000000..283d71033
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/config.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* "Cheater" definitions based on restricted Kconfig choices. */
+
+#undef CONFIG_TINY_RCU
+#undef __CHECKER__
+#undef CONFIG_DEBUG_LOCK_ALLOC
+#undef CONFIG_DEBUG_OBJECTS_RCU_HEAD
+#undef CONFIG_HOTPLUG_CPU
+#undef CONFIG_MODULES
+#undef CONFIG_NO_HZ_FULL_SYSIDLE
+#undef CONFIG_PREEMPT_COUNT
+#undef CONFIG_PREEMPT_RCU
+#undef CONFIG_PROVE_RCU
+#undef CONFIG_RCU_NOCB_CPU
+#undef CONFIG_RCU_NOCB_CPU_ALL
+#undef CONFIG_RCU_STALL_COMMON
+#undef CONFIG_RCU_TRACE
+#undef CONFIG_RCU_USER_QS
+#undef CONFIG_TASKS_RCU
+#define CONFIG_TREE_RCU
+
+#define CONFIG_GENERIC_ATOMIC64
+
+#if NR_CPUS > 1
+#define CONFIG_SMP
+#else
+#undef CONFIG_SMP
+#endif
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/include_srcu.c b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/include_srcu.c
new file mode 100644
index 000000000..e5202d4cf
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/include_srcu.c
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <config.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <pthread.h>
+#include <stddef.h>
+#include <string.h>
+#include <sys/types.h>
+
+#include "int_typedefs.h"
+
+#include "barriers.h"
+#include "bug_on.h"
+#include "locks.h"
+#include "misc.h"
+#include "preempt.h"
+#include "percpu.h"
+#include "workqueues.h"
+
+#ifdef USE_SIMPLE_SYNC_SRCU
+#define synchronize_srcu(sp) synchronize_srcu_original(sp)
+#endif
+
+#include <srcu.c>
+
+#ifdef USE_SIMPLE_SYNC_SRCU
+#undef synchronize_srcu
+
+#include "simple_sync_srcu.c"
+#endif
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/int_typedefs.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/int_typedefs.h
new file mode 100644
index 000000000..0dd27aa51
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/int_typedefs.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef INT_TYPEDEFS_H
+#define INT_TYPEDEFS_H
+
+#include <inttypes.h>
+
+typedef int8_t s8;
+typedef uint8_t u8;
+typedef int16_t s16;
+typedef uint16_t u16;
+typedef int32_t s32;
+typedef uint32_t u32;
+typedef int64_t s64;
+typedef uint64_t u64;
+
+typedef int8_t __s8;
+typedef uint8_t __u8;
+typedef int16_t __s16;
+typedef uint16_t __u16;
+typedef int32_t __s32;
+typedef uint32_t __u32;
+typedef int64_t __s64;
+typedef uint64_t __u64;
+
+#define S8_C(x) INT8_C(x)
+#define U8_C(x) UINT8_C(x)
+#define S16_C(x) INT16_C(x)
+#define U16_C(x) UINT16_C(x)
+#define S32_C(x) INT32_C(x)
+#define U32_C(x) UINT32_C(x)
+#define S64_C(x) INT64_C(x)
+#define U64_C(x) UINT64_C(x)
+
+#endif
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/locks.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/locks.h
new file mode 100644
index 000000000..1e24827f9
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/locks.h
@@ -0,0 +1,221 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef LOCKS_H
+#define LOCKS_H
+
+#include <limits.h>
+#include <pthread.h>
+#include <stdbool.h>
+
+#include "assume.h"
+#include "bug_on.h"
+#include "preempt.h"
+
+int nondet_int(void);
+
+#define __acquire(x)
+#define __acquires(x)
+#define __release(x)
+#define __releases(x)
+
+/* Only use one lock mechanism. Select which one. */
+#ifdef PTHREAD_LOCK
+struct lock_impl {
+	pthread_mutex_t mutex;
+};
+
+static inline void lock_impl_lock(struct lock_impl *lock)
+{
+	BUG_ON(pthread_mutex_lock(&lock->mutex));
+}
+
+static inline void lock_impl_unlock(struct lock_impl *lock)
+{
+	BUG_ON(pthread_mutex_unlock(&lock->mutex));
+}
+
+static inline bool lock_impl_trylock(struct lock_impl *lock)
+{
+	int err = pthread_mutex_trylock(&lock->mutex);
+
+	if (!err)
+		return true;
+	else if (err == EBUSY)
+		return false;
+	BUG();
+}
+
+static inline void lock_impl_init(struct lock_impl *lock)
+{
+	pthread_mutex_init(&lock->mutex, NULL);
+}
+
+#define LOCK_IMPL_INITIALIZER {.mutex = PTHREAD_MUTEX_INITIALIZER}
+
+#else /* !defined(PTHREAD_LOCK) */
+/* Spinlock that assumes that it always gets the lock immediately. */
+
+struct lock_impl {
+	bool locked;
+};
+
+static inline bool lock_impl_trylock(struct lock_impl *lock)
+{
+#ifdef RUN
+	/* TODO: Should this be a test and set? */
+	return __sync_bool_compare_and_swap(&lock->locked, false, true);
+#else
+	__CPROVER_atomic_begin();
+	bool old_locked = lock->locked;
+	lock->locked = true;
+	__CPROVER_atomic_end();
+
+	/* Minimal barrier to prevent accesses leaking out of lock. */
+	__CPROVER_fence("RRfence", "RWfence");
+
+	return !old_locked;
+#endif
+}
+
+static inline void lock_impl_lock(struct lock_impl *lock)
+{
+	/*
+	 * CBMC doesn't support busy waiting, so just assume that the
+	 * lock is available.
+	 */
+	assume(lock_impl_trylock(lock));
+
+	/*
+	 * If the lock was already held by this thread then the assumption
+	 * is unsatisfiable (deadlock).
+	 */
+}
+
+static inline void lock_impl_unlock(struct lock_impl *lock)
+{
+#ifdef RUN
+	BUG_ON(!__sync_bool_compare_and_swap(&lock->locked, true, false));
+#else
+	/* Minimal barrier to prevent accesses leaking out of lock. */
+	__CPROVER_fence("RWfence", "WWfence");
+
+	__CPROVER_atomic_begin();
+	bool old_locked = lock->locked;
+	lock->locked = false;
+	__CPROVER_atomic_end();
+
+	BUG_ON(!old_locked);
+#endif
+}
+
+static inline void lock_impl_init(struct lock_impl *lock)
+{
+	lock->locked = false;
+}
+
+#define LOCK_IMPL_INITIALIZER {.locked = false}
+
+#endif /* !defined(PTHREAD_LOCK) */
+
+/*
+ * Implement spinlocks using the lock mechanism. Wrap the lock to prevent mixing
+ * locks of different types.
+ */
+typedef struct {
+	struct lock_impl internal_lock;
+} spinlock_t;
+
+#define SPIN_LOCK_UNLOCKED {.internal_lock = LOCK_IMPL_INITIALIZER}
+#define __SPIN_LOCK_UNLOCKED(x) SPIN_LOCK_UNLOCKED
+#define DEFINE_SPINLOCK(x) spinlock_t x = SPIN_LOCK_UNLOCKED
+
+static inline void spin_lock_init(spinlock_t *lock)
+{
+	lock_impl_init(&lock->internal_lock);
+}
+
+static inline void spin_lock(spinlock_t *lock)
+{
+	/*
+	 * Spin locks also need to be removed in order to eliminate all
+	 * memory barriers. They are only used by the write side anyway.
+	 */
+#ifndef NO_SYNC_SMP_MB
+	preempt_disable();
+	lock_impl_lock(&lock->internal_lock);
+#endif
+}
+
+static inline void spin_unlock(spinlock_t *lock)
+{
+#ifndef NO_SYNC_SMP_MB
+	lock_impl_unlock(&lock->internal_lock);
+	preempt_enable();
+#endif
+}
+
+/* Don't bother with interrupts */
+#define spin_lock_irq(lock) spin_lock(lock)
+#define spin_unlock_irq(lock) spin_unlock(lock)
+#define spin_lock_irqsave(lock, flags) spin_lock(lock)
+#define spin_unlock_irqrestore(lock, flags) spin_unlock(lock)
+
+/*
+ * This is supposed to return an int, but I think that a bool should work as
+ * well.
+ */
+static inline bool spin_trylock(spinlock_t *lock)
+{
+#ifndef NO_SYNC_SMP_MB
+	preempt_disable();
+	return lock_impl_trylock(&lock->internal_lock);
+#else
+	return true;
+#endif
+}
+
+struct completion {
+	/* Hopefully this won't overflow. */
+	unsigned int count;
+};
+
+#define COMPLETION_INITIALIZER(x) {.count = 0}
+#define DECLARE_COMPLETION(x) struct completion x = COMPLETION_INITIALIZER(x)
+#define DECLARE_COMPLETION_ONSTACK(x) DECLARE_COMPLETION(x)
+
+static inline void init_completion(struct completion *c)
+{
+	c->count = 0;
+}
+
+static inline void wait_for_completion(struct completion *c)
+{
+	unsigned int prev_count = __sync_fetch_and_sub(&c->count, 1);
+
+	assume(prev_count);
+}
+
+static inline void complete(struct completion *c)
+{
+	unsigned int prev_count = __sync_fetch_and_add(&c->count, 1);
+
+	BUG_ON(prev_count == UINT_MAX);
+}
+
+/* This function probably isn't very useful for CBMC. */
+static inline bool try_wait_for_completion(struct completion *c)
+{
+	BUG();
+}
+
+static inline bool completion_done(struct completion *c)
+{
+	return c->count;
+}
+
+/* TODO: Implement complete_all */
+static inline void complete_all(struct completion *c)
+{
+	BUG();
+}
+
+#endif
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/misc.c b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/misc.c
new file mode 100644
index 000000000..9440cc39e
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/misc.c
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <config.h>
+
+#include "misc.h"
+#include "bug_on.h"
+
+struct rcu_head;
+
+void wakeme_after_rcu(struct rcu_head *head)
+{
+	BUG();
+}
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/misc.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/misc.h
new file mode 100644
index 000000000..aca50030f
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/misc.h
@@ -0,0 +1,58 @@
+#ifndef MISC_H
+#define MISC_H
+
+#include "assume.h"
+#include "int_typedefs.h"
+#include "locks.h"
+
+#include <linux/types.h>
+
+/* Probably won't need to deal with bottom halves. */
+static inline void local_bh_disable(void) {}
+static inline void local_bh_enable(void) {}
+
+#define MODULE_ALIAS(X)
+#define module_param(...)
+#define EXPORT_SYMBOL_GPL(x)
+
+#define container_of(ptr, type, member) ({			\
+	const typeof(((type *)0)->member) *__mptr = (ptr);	\
+	(type *)((char *)__mptr - offsetof(type, member));	\
+})
+
+#ifndef USE_SIMPLE_SYNC_SRCU
+/* Abuse udelay to make sure that busy loops terminate. */
+#define udelay(x) assume(0)
+
+#else
+
+/* The simple custom synchronize_srcu is ok with try_check_zero failing. */
+#define udelay(x) do { } while (0)
+#endif
+
+#define trace_rcu_torture_read(rcutorturename, rhp, secs, c_old, c) \
+	do { } while (0)
+
+#define notrace
+
+/* Avoid including rcupdate.h */
+struct rcu_synchronize {
+	struct rcu_head head;
+	struct completion completion;
+};
+
+void wakeme_after_rcu(struct rcu_head *head);
+
+#define rcu_lock_acquire(a) do { } while (0)
+#define rcu_lock_release(a) do { } while (0)
+#define rcu_lockdep_assert(c, s) do { } while (0)
+#define RCU_LOCKDEP_WARN(c, s) do { } while (0)
+
+/* Let CBMC non-deterministically choose switch between normal and expedited. */
+bool rcu_gp_is_normal(void);
+bool rcu_gp_is_expedited(void);
+
+/* Do the same for old versions of rcu. */
+#define rcu_expedited (rcu_gp_is_expedited())
+
+#endif
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/percpu.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/percpu.h
new file mode 100644
index 000000000..27e67a3f2
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/percpu.h
@@ -0,0 +1,93 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef PERCPU_H
+#define PERCPU_H
+
+#include <stddef.h>
+#include "bug_on.h"
+#include "preempt.h"
+
+#define __percpu
+
+/* Maximum size of any percpu data. */
+#define PERCPU_OFFSET (4 * sizeof(long))
+
+/* Ignore alignment, as CBMC doesn't care about false sharing. */
+#define alloc_percpu(type) __alloc_percpu(sizeof(type), 1)
+
+static inline void *__alloc_percpu(size_t size, size_t align)
+{
+	BUG();
+	return NULL;
+}
+
+static inline void free_percpu(void *ptr)
+{
+	BUG();
+}
+
+#define per_cpu_ptr(ptr, cpu) \
+	((typeof(ptr)) ((char *) (ptr) + PERCPU_OFFSET * cpu))
+
+#define __this_cpu_inc(pcp) __this_cpu_add(pcp, 1)
+#define __this_cpu_dec(pcp) __this_cpu_sub(pcp, 1)
+#define __this_cpu_sub(pcp, n) __this_cpu_add(pcp, -(typeof(pcp)) (n))
+
+#define this_cpu_inc(pcp) this_cpu_add(pcp, 1)
+#define this_cpu_dec(pcp) this_cpu_sub(pcp, 1)
+#define this_cpu_sub(pcp, n) this_cpu_add(pcp, -(typeof(pcp)) (n))
+
+/* Make CBMC use atomics to work around bug. */
+#ifdef RUN
+#define THIS_CPU_ADD_HELPER(ptr, x) (*(ptr) += (x))
+#else
+/*
+ * Split the atomic into a read and a write so that it has the least
+ * possible ordering.
+ */
+#define THIS_CPU_ADD_HELPER(ptr, x) \
+	do { \
+		typeof(ptr) this_cpu_add_helper_ptr = (ptr); \
+		typeof(ptr) this_cpu_add_helper_x = (x); \
+		typeof(*ptr) this_cpu_add_helper_temp; \
+		__CPROVER_atomic_begin(); \
+		this_cpu_add_helper_temp = *(this_cpu_add_helper_ptr); \
+		__CPROVER_atomic_end(); \
+		this_cpu_add_helper_temp += this_cpu_add_helper_x; \
+		__CPROVER_atomic_begin(); \
+		*(this_cpu_add_helper_ptr) = this_cpu_add_helper_temp; \
+		__CPROVER_atomic_end(); \
+	} while (0)
+#endif
+
+/*
+ * For some reason CBMC needs an atomic operation even though this is percpu
+ * data.
+ */
+#define __this_cpu_add(pcp, n) \
+	do { \
+		BUG_ON(preemptible()); \
+		THIS_CPU_ADD_HELPER(per_cpu_ptr(&(pcp), thread_cpu_id), \
+				    (typeof(pcp)) (n)); \
+	} while (0)
+
+#define this_cpu_add(pcp, n) \
+	do { \
+		int this_cpu_add_impl_cpu = get_cpu(); \
+		THIS_CPU_ADD_HELPER(per_cpu_ptr(&(pcp), this_cpu_add_impl_cpu), \
+				    (typeof(pcp)) (n)); \
+		put_cpu(); \
+	} while (0)
+
+/*
+ * This will cause a compiler warning because of the cast from char[][] to
+ * type*. This will cause a compile time error if type is too big.
+ */
+#define DEFINE_PER_CPU(type, name) \
+	char name[NR_CPUS][PERCPU_OFFSET]; \
+	typedef char percpu_too_big_##name \
+		[sizeof(type) > PERCPU_OFFSET ? -1 : 1]
+
+#define for_each_possible_cpu(cpu) \
+	for ((cpu) = 0; (cpu) < NR_CPUS; ++(cpu))
+
+#endif
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/preempt.c b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/preempt.c
new file mode 100644
index 000000000..b4083ae34
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/preempt.c
@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <config.h>
+
+#include "preempt.h"
+
+#include "assume.h"
+#include "locks.h"
+
+/* Support NR_CPUS of at most 64 */
+#define CPU_PREEMPTION_LOCKS_INIT0 LOCK_IMPL_INITIALIZER
+#define CPU_PREEMPTION_LOCKS_INIT1 \
+	CPU_PREEMPTION_LOCKS_INIT0, CPU_PREEMPTION_LOCKS_INIT0
+#define CPU_PREEMPTION_LOCKS_INIT2 \
+	CPU_PREEMPTION_LOCKS_INIT1, CPU_PREEMPTION_LOCKS_INIT1
+#define CPU_PREEMPTION_LOCKS_INIT3 \
+	CPU_PREEMPTION_LOCKS_INIT2, CPU_PREEMPTION_LOCKS_INIT2
+#define CPU_PREEMPTION_LOCKS_INIT4 \
+	CPU_PREEMPTION_LOCKS_INIT3, CPU_PREEMPTION_LOCKS_INIT3
+#define CPU_PREEMPTION_LOCKS_INIT5 \
+	CPU_PREEMPTION_LOCKS_INIT4, CPU_PREEMPTION_LOCKS_INIT4
+
+/*
+ * Simulate disabling preemption by locking a particular cpu. NR_CPUS
+ * should be the actual number of cpus, not just the maximum.
+ */
+struct lock_impl cpu_preemption_locks[NR_CPUS] = {
+	CPU_PREEMPTION_LOCKS_INIT0
+#if (NR_CPUS - 1) & 1
+	, CPU_PREEMPTION_LOCKS_INIT0
+#endif
+#if (NR_CPUS - 1) & 2
+	, CPU_PREEMPTION_LOCKS_INIT1
+#endif
+#if (NR_CPUS - 1) & 4
+	, CPU_PREEMPTION_LOCKS_INIT2
+#endif
+#if (NR_CPUS - 1) & 8
+	, CPU_PREEMPTION_LOCKS_INIT3
+#endif
+#if (NR_CPUS - 1) & 16
+	, CPU_PREEMPTION_LOCKS_INIT4
+#endif
+#if (NR_CPUS - 1) & 32
+	, CPU_PREEMPTION_LOCKS_INIT5
+#endif
+};
+
+#undef CPU_PREEMPTION_LOCKS_INIT0
+#undef CPU_PREEMPTION_LOCKS_INIT1
+#undef CPU_PREEMPTION_LOCKS_INIT2
+#undef CPU_PREEMPTION_LOCKS_INIT3
+#undef CPU_PREEMPTION_LOCKS_INIT4
+#undef CPU_PREEMPTION_LOCKS_INIT5
+
+__thread int thread_cpu_id;
+__thread int preempt_disable_count;
+
+void preempt_disable(void)
+{
+	BUG_ON(preempt_disable_count < 0 || preempt_disable_count == INT_MAX);
+
+	if (preempt_disable_count++)
+		return;
+
+	thread_cpu_id = nondet_int();
+	assume(thread_cpu_id >= 0);
+	assume(thread_cpu_id < NR_CPUS);
+	lock_impl_lock(&cpu_preemption_locks[thread_cpu_id]);
+}
+
+void preempt_enable(void)
+{
+	BUG_ON(preempt_disable_count < 1);
+
+	if (--preempt_disable_count)
+		return;
+
+	lock_impl_unlock(&cpu_preemption_locks[thread_cpu_id]);
+}
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/preempt.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/preempt.h
new file mode 100644
index 000000000..f8b762cd2
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/preempt.h
@@ -0,0 +1,59 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef PREEMPT_H
+#define PREEMPT_H
+
+#include <stdbool.h>
+
+#include "bug_on.h"
+
+/* This flag contains garbage if preempt_disable_count is 0. */
+extern __thread int thread_cpu_id;
+
+/* Support recursive preemption disabling. */
+extern __thread int preempt_disable_count;
+
+void preempt_disable(void);
+void preempt_enable(void);
+
+static inline void preempt_disable_notrace(void)
+{
+	preempt_disable();
+}
+
+static inline void preempt_enable_no_resched(void)
+{
+	preempt_enable();
+}
+
+static inline void preempt_enable_notrace(void)
+{
+	preempt_enable();
+}
+
+static inline int preempt_count(void)
+{
+	return preempt_disable_count;
+}
+
+static inline bool preemptible(void)
+{
+	return !preempt_count();
+}
+
+static inline int get_cpu(void)
+{
+	preempt_disable();
+	return thread_cpu_id;
+}
+
+static inline void put_cpu(void)
+{
+	preempt_enable();
+}
+
+static inline void might_sleep(void)
+{
+	BUG_ON(preempt_disable_count);
+}
+
+#endif
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/simple_sync_srcu.c b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/simple_sync_srcu.c
new file mode 100644
index 000000000..97f592048
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/simple_sync_srcu.c
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <config.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <pthread.h>
+#include <stddef.h>
+#include <string.h>
+#include <sys/types.h>
+
+#include "int_typedefs.h"
+
+#include "barriers.h"
+#include "bug_on.h"
+#include "locks.h"
+#include "misc.h"
+#include "preempt.h"
+#include "percpu.h"
+#include "workqueues.h"
+
+#include <linux/srcu.h>
+
+/* Functions needed from modify_srcu.c */
+bool try_check_zero(struct srcu_struct *sp, int idx, int trycount);
+void srcu_flip(struct srcu_struct *sp);
+
+/* Simpler implementation of synchronize_srcu that ignores batching. */
+void synchronize_srcu(struct srcu_struct *sp)
+{
+	int idx;
+	/*
+	 * This code assumes that try_check_zero will succeed anyway,
+	 * so there is no point in multiple tries.
+	 */
+	const int trycount = 1;
+
+	might_sleep();
+
+	/* Ignore the lock, as multiple writers aren't working yet anyway. */
+
+	idx = 1 ^ (sp->completed & 1);
+
+	/* For comments see srcu_advance_batches. */
+
+	assume(try_check_zero(sp, idx, trycount));
+
+	srcu_flip(sp);
+
+	assume(try_check_zero(sp, idx^1, trycount));
+}
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/workqueues.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/workqueues.h
new file mode 100644
index 000000000..28b960300
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/workqueues.h
@@ -0,0 +1,103 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef WORKQUEUES_H
+#define WORKQUEUES_H
+
+#include <stdbool.h>
+
+#include "barriers.h"
+#include "bug_on.h"
+#include "int_typedefs.h"
+
+#include <linux/types.h>
+
+/* Stub workqueue implementation. */
+
+struct work_struct;
+typedef void (*work_func_t)(struct work_struct *work);
+void delayed_work_timer_fn(unsigned long __data);
+
+struct work_struct {
+/*	atomic_long_t data; */
+	unsigned long data;
+
+	struct list_head entry;
+	work_func_t func;
+#ifdef CONFIG_LOCKDEP
+	struct lockdep_map lockdep_map;
+#endif
+};
+
+struct timer_list {
+	struct hlist_node	entry;
+	unsigned long		expires;
+	void			(*function)(unsigned long);
+	unsigned long		data;
+	u32			flags;
+	int			slack;
+};
+
+struct delayed_work {
+	struct work_struct work;
+	struct timer_list timer;
+
+	/* target workqueue and CPU ->timer uses to queue ->work */
+	struct workqueue_struct *wq;
+	int cpu;
+};
+
+
+static inline bool schedule_work(struct work_struct *work)
+{
+	BUG();
+	return true;
+}
+
+static inline bool schedule_work_on(int cpu, struct work_struct *work)
+{
+	BUG();
+	return true;
+}
+
+static inline bool queue_work(struct workqueue_struct *wq,
+			      struct work_struct *work)
+{
+	BUG();
+	return true;
+}
+
+static inline bool queue_delayed_work(struct workqueue_struct *wq,
+				      struct delayed_work *dwork,
+				      unsigned long delay)
+{
+	BUG();
+	return true;
+}
+
+#define INIT_WORK(w, f) \
+	do { \
+		(w)->data = 0; \
+		(w)->func = (f); \
+	} while (0)
+
+#define INIT_DELAYED_WORK(w, f) INIT_WORK(&(w)->work, (f))
+
+#define __WORK_INITIALIZER(n, f) { \
+		.data = 0, \
+		.entry = { &(n).entry, &(n).entry }, \
+		.func = f \
+	}
+
+/* Don't bother initializing timer. */
+#define __DELAYED_WORK_INITIALIZER(n, f, tflags) { \
+	.work = __WORK_INITIALIZER((n).work, (f)), \
+	}
+
+#define DECLARE_WORK(n, f) \
+	struct workqueue_struct n = __WORK_INITIALIZER
+
+#define DECLARE_DELAYED_WORK(n, f) \
+	struct delayed_work n = __DELAYED_WORK_INITIALIZER(n, f, 0)
+
+#define system_power_efficient_wq ((struct workqueue_struct *) NULL)
+
+#endif
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/.gitignore b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/.gitignore
new file mode 100644
index 000000000..d65462d64
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/.gitignore
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+*.out
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/Makefile b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/Makefile
new file mode 100644
index 000000000..ad21b925f
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/Makefile
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0
+CBMC_FLAGS = -I../.. -I../../src -I../../include -I../../empty_includes -32 -pointer-check -mm pso
+
+all:
+	for i in ./*.pass; do \
+		echo $$i ; \
+		CBMC_FLAGS="$(CBMC_FLAGS)" sh ../test_script.sh --should-pass $$i > $$i.out 2>&1 ; \
+	done
+	for i in ./*.fail; do \
+		echo $$i ; \
+		CBMC_FLAGS="$(CBMC_FLAGS)" sh ../test_script.sh --should-fail $$i > $$i.out 2>&1 ; \
+	done
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/assert_end.fail b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/assert_end.fail
new file mode 100644
index 000000000..40c807591
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/assert_end.fail
@@ -0,0 +1 @@
+test_cbmc_options="-DASSERT_END"
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/force.fail b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/force.fail
new file mode 100644
index 000000000..ada5baf0b
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/force.fail
@@ -0,0 +1 @@
+test_cbmc_options="-DFORCE_FAILURE"
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/force2.fail b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/force2.fail
new file mode 100644
index 000000000..8fe00c8db
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/force2.fail
@@ -0,0 +1 @@
+test_cbmc_options="-DFORCE_FAILURE_2"
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/force3.fail b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/force3.fail
new file mode 100644
index 000000000..612ed6772
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/force3.fail
@@ -0,0 +1 @@
+test_cbmc_options="-DFORCE_FAILURE_3"
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/main.pass b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/main.pass
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/main.pass
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/test.c b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/test.c
new file mode 100644
index 000000000..2ce2016f7
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/test.c
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <src/combined_source.c>
+
+int x;
+int y;
+
+int __unbuffered_tpr_x;
+int __unbuffered_tpr_y;
+
+DEFINE_SRCU(ss);
+
+void rcu_reader(void)
+{
+	int idx;
+
+#ifndef FORCE_FAILURE_3
+	idx = srcu_read_lock(&ss);
+#endif
+	might_sleep();
+
+	__unbuffered_tpr_y = READ_ONCE(y);
+#ifdef FORCE_FAILURE
+	srcu_read_unlock(&ss, idx);
+	idx = srcu_read_lock(&ss);
+#endif
+	WRITE_ONCE(x, 1);
+
+#ifndef FORCE_FAILURE_3
+	srcu_read_unlock(&ss, idx);
+#endif
+	might_sleep();
+}
+
+void *thread_update(void *arg)
+{
+	WRITE_ONCE(y, 1);
+#ifndef FORCE_FAILURE_2
+	synchronize_srcu(&ss);
+#endif
+	might_sleep();
+	__unbuffered_tpr_x = READ_ONCE(x);
+
+	return NULL;
+}
+
+void *thread_process_reader(void *arg)
+{
+	rcu_reader();
+
+	return NULL;
+}
+
+int main(int argc, char *argv[])
+{
+	pthread_t tu;
+	pthread_t tpr;
+
+	if (pthread_create(&tu, NULL, thread_update, NULL))
+		abort();
+	if (pthread_create(&tpr, NULL, thread_process_reader, NULL))
+		abort();
+	if (pthread_join(tu, NULL))
+		abort();
+	if (pthread_join(tpr, NULL))
+		abort();
+	assert(__unbuffered_tpr_y != 0 || __unbuffered_tpr_x != 0);
+
+#ifdef ASSERT_END
+	assert(0);
+#endif
+
+	return 0;
+}
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/test_script.sh b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/test_script.sh
new file mode 100755
index 000000000..2fe1f0339
--- /dev/null
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/test_script.sh
@@ -0,0 +1,103 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+# This script expects a mode (either --should-pass or --should-fail) followed by
+# an input file. The script uses the following environment variables. The test C
+# source file is expected to be named test.c in the directory containing the
+# input file.
+#
+# CBMC: The command to run CBMC. Default: cbmc
+# CBMC_FLAGS: Additional flags to pass to CBMC
+# NR_CPUS: Number of cpus to run tests with. Default specified by the test
+# SYNC_SRCU_MODE: Choose implementation of synchronize_srcu. Defaults to simple.
+#                 kernel: Version included in the linux kernel source.
+#                 simple: Use try_check_zero directly.
+#
+# The input file is a script that is sourced by this file. It can define any of
+# the following variables to configure the test.
+#
+# test_cbmc_options: Extra options to pass to CBMC.
+# min_cpus_fail: Minimum number of CPUs (NR_CPUS) for verification to fail.
+#                The test is expected to pass if it is run with fewer. (Only
+#                useful for .fail files)
+# default_cpus: Quantity of CPUs to use for the test, if not specified on the
+#               command line. Default: Larger of 2 and MIN_CPUS_FAIL.
+
+set -e
+
+if test "$#" -ne 2; then
+	echo "Expected one option followed by an input file" 1>&2
+	exit 99
+fi
+
+if test "x$1" = "x--should-pass"; then
+	should_pass="yes"
+elif test "x$1" = "x--should-fail"; then
+	should_pass="no"
+else
+	echo "Unrecognized argument '$1'" 1>&2
+
+	# Exit code 99 indicates a hard error.
+	exit 99
+fi
+
+CBMC=${CBMC:-cbmc}
+
+SYNC_SRCU_MODE=${SYNC_SRCU_MODE:-simple}
+
+case ${SYNC_SRCU_MODE} in
+kernel) sync_srcu_mode_flags="" ;;
+simple) sync_srcu_mode_flags="-DUSE_SIMPLE_SYNC_SRCU" ;;
+
+*)
+	echo "Unrecognized argument '${SYNC_SRCU_MODE}'" 1>&2
+	exit 99
+	;;
+esac
+
+min_cpus_fail=1
+
+c_file=`dirname "$2"`/test.c
+
+# Source the input file.
+. $2
+
+if test ${min_cpus_fail} -gt 2; then
+	default_default_cpus=${min_cpus_fail}
+else
+	default_default_cpus=2
+fi
+default_cpus=${default_cpus:-${default_default_cpus}}
+cpus=${NR_CPUS:-${default_cpus}}
+
+# Check if there are two few cpus to make the test fail.
+if test $cpus -lt ${min_cpus_fail:-0}; then
+	should_pass="yes"
+fi
+
+cbmc_opts="-DNR_CPUS=${cpus} ${sync_srcu_mode_flags} ${test_cbmc_options} ${CBMC_FLAGS}"
+
+echo "Running CBMC: ${CBMC} ${cbmc_opts} ${c_file}"
+if ${CBMC} ${cbmc_opts} "${c_file}"; then
+	# Verification successful. Make sure that it was supposed to verify.
+	test "x${should_pass}" = xyes
+else
+	cbmc_exit_status=$?
+
+	# An exit status of 10 indicates a failed verification.
+	# (see cbmc_parse_optionst::do_bmc in the CBMC source code)
+	if test ${cbmc_exit_status} -eq 10 && test "x${should_pass}" = xno; then
+		:
+	else
+		echo "CBMC returned ${cbmc_exit_status} exit status" 1>&2
+
+		# Parse errors have exit status 6. Any other type of error
+		# should be considered a hard error.
+		if test ${cbmc_exit_status} -ne 6 && \
+		   test ${cbmc_exit_status} -ne 10; then
+			exit 99
+		else
+			exit 1
+		fi
+	fi
+fi