rcutorture: Remove RCU dependencies from ver_functions.sh API

The current set of functions in ver_functions.sh have APIs that are
specific to RCU.  This commit therefore makes an RCU-independent function
that outputs version-specific boot arguments.  This has the benefit that
a test-type-independent call in kvm-test-1-rcu.sh can now handle any type
of test, given a test-type-specific set of files in a configs directory.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

5 files changed, 59 insertions, 40 deletions

diff --git a/tools/testing/selftests/rcutorture/bin/kvm-test-1-rcu.sh b/tools/testing/selftests/rcutorture/bin/kvm-test-1-rcu.sh
index 30cfbc8f3a0b..7986b3e7f318 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm-test-1-rcu.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm-test-1-rcu.sh
@@ -148,12 +148,8 @@ qemu_append="`identify_qemu_append "$QEMU"`"
 
 # Pull in Kconfig-fragment boot parameters
 boot_args="`configfrag_boot_params "$boot_args" "$config_template"`"
-# Generate CPU-hotplug boot parameters
-boot_args="`rcutorture_param_onoff "$boot_args" $builddir/.config`"
-# Generate rcu_barrier() boot parameter
-boot_args="`rcutorture_param_n_barrier_cbs "$boot_args"`"
-# Pull in standard rcutorture boot arguments
-boot_args="$boot_args rcutorture.stat_interval=15 rcutorture.shutdown_secs=$seconds rcutorture.rcutorture_runnable=1 rcutorture.test_no_idle_hz=1 rcutorture.verbose=1"
+# Generate kernel-version-specific boot parameters
+boot_args="`per_version_boot_params "$boot_args" $builddir/.config $seconds`"
 
 echo $QEMU $qemu_args -m 512 -kernel $builddir/arch/x86/boot/bzImage -append \"$qemu_append $boot_args\" > $resdir/qemu-cmd
 if test -n "$RCU_BUILDONLY"
diff --git a/tools/testing/selftests/rcutorture/configs/v0.0/ver_functions.sh b/tools/testing/selftests/rcutorture/configs/v0.0/ver_functions.sh
index e8052539af54..5ace37a89780 100644
--- a/tools/testing/selftests/rcutorture/configs/v0.0/ver_functions.sh
+++ b/tools/testing/selftests/rcutorture/configs/v0.0/ver_functions.sh
@@ -20,16 +20,14 @@
 #
 # Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
 
-# rcutorture_param_n_barrier_cbs bootparam-string
-#
-# Adds n_barrier_cbs rcutorture module parameter to kernels having it.
-rcutorture_param_n_barrier_cbs () {
-        echo $1
-}
-
-# rcutorture_param_onoff bootparam-string config-file
-#
-# Adds onoff rcutorture module parameters to kernels having it.
-rcutorture_param_onoff () {
-        echo $1
+# per_version_boot_params bootparam-string config-file seconds
+#
+# Adds per-version torture-module parameters to kernels supporting them.
+# Which old kernels do not.
+per_version_boot_params () {
+        echo    rcutorture.stat_interval=15 \
+                rcutorture.shutdown_secs=$3 \
+                rcutorture.rcutorture_runnable=1 \
+                rcutorture.test_no_idle_hz=1 \
+                rcutorture.verbose=1
 }
diff --git a/tools/testing/selftests/rcutorture/configs/v3.3/ver_functions.sh b/tools/testing/selftests/rcutorture/configs/v3.3/ver_functions.sh
index c37432f3572c..bae55692ce6e 100644
--- a/tools/testing/selftests/rcutorture/configs/v3.3/ver_functions.sh
+++ b/tools/testing/selftests/rcutorture/configs/v3.3/ver_functions.sh
@@ -20,22 +20,25 @@
 #
 # Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
 
-# rcutorture_param_n_barrier_cbs bootparam-string
-#
-# Adds n_barrier_cbs rcutorture module parameter to kernels having it.
-rcutorture_param_n_barrier_cbs () {
-        echo $1
-}
-
 # 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.
-                echo $1 rcutorture.onoff_interval=3 rcutorture.onoff_holdoff=30
-        else
-                echo $1
+                echo CPU-hotplug kernel, adding rcutorture onoff. 1>&2
+                echo rcutorture.onoff_interval=3 rcutorture.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 `rcutorture_param_onoff "$1" "$2"` \
+                rcutorture.stat_interval=15 \
+                rcutorture.shutdown_secs=$3 \
+                rcutorture.rcutorture_runnable=1 \
+                rcutorture.test_no_idle_hz=1 \
+                rcutorture.verbose=1
+}
diff --git a/tools/testing/selftests/rcutorture/configs/v3.5/ver_functions.sh b/tools/testing/selftests/rcutorture/configs/v3.5/ver_functions.sh
index 6a5f13aab44d..8977d8d31b19 100644
--- a/tools/testing/selftests/rcutorture/configs/v3.5/ver_functions.sh
+++ b/tools/testing/selftests/rcutorture/configs/v3.5/ver_functions.sh
@@ -26,9 +26,9 @@
 rcutorture_param_n_barrier_cbs () {
         if echo $1 | grep -q "rcutorture\.n_barrier_cbs"
         then
-                echo $1
+                :
         else
-                echo $1 rcutorture.n_barrier_cbs=4
+                echo rcutorture.n_barrier_cbs=4
         fi
 }
 
@@ -38,9 +38,20 @@ rcutorture_param_n_barrier_cbs () {
 rcutorture_param_onoff () {
         if ! bootparam_hotplug_cpu "$1" && configfrag_hotplug_cpu "$2"
         then
-                echo CPU-hotplug kernel, adding rcutorture onoff.
-                echo $1 rcutorture.onoff_interval=3 rcutorture.onoff_holdoff=30
-        else
-                echo $1
+                echo CPU-hotplug kernel, adding rcutorture onoff. 1>&2
+                echo rcutorture.onoff_interval=3 rcutorture.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 `rcutorture_param_onoff "$1" "$2"` \
+                `rcutorture_param_n_barrier_cbs "$1"` \
+                rcutorture.stat_interval=15 \
+                rcutorture.shutdown_secs=$3 \
+                rcutorture.rcutorture_runnable=1 \
+                rcutorture.test_no_idle_hz=1 \
+                rcutorture.verbose=1
+}
diff --git a/tools/testing/selftests/rcutorture/configs/ver_functions.sh b/tools/testing/selftests/rcutorture/configs/ver_functions.sh
index 5e40eadea777..8977d8d31b19 100644
--- a/tools/testing/selftests/rcutorture/configs/ver_functions.sh
+++ b/tools/testing/selftests/rcutorture/configs/ver_functions.sh
@@ -26,9 +26,9 @@
 rcutorture_param_n_barrier_cbs () {
         if echo $1 | grep -q "rcutorture\.n_barrier_cbs"
         then
-                echo $1
+                :
         else
-                echo $1 rcutorture.n_barrier_cbs=4
+                echo rcutorture.n_barrier_cbs=4
         fi
 }
 
@@ -39,8 +39,19 @@ rcutorture_param_onoff () {
         if ! bootparam_hotplug_cpu "$1" && configfrag_hotplug_cpu "$2"
         then
                 echo CPU-hotplug kernel, adding rcutorture onoff. 1>&2
-                echo $1 rcutorture.onoff_interval=3 rcutorture.onoff_holdoff=30
-        else
-                echo $1
+                echo rcutorture.onoff_interval=3 rcutorture.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 `rcutorture_param_onoff "$1" "$2"` \
+                `rcutorture_param_n_barrier_cbs "$1"` \
+                rcutorture.stat_interval=15 \
+                rcutorture.shutdown_secs=$3 \
+                rcutorture.rcutorture_runnable=1 \
+                rcutorture.test_no_idle_hz=1 \
+                rcutorture.verbose=1
+}