Merge tag 'linux-kselftest-5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kselftest cleanups from Shuah Khan:

 - ftrace "requires:" list for simplifying and unifying requirement
   checks for each test case, adding "requires:" line instead of
   checking required ftrace interfaces in each test case.

 - a minor spelling correction patch

* tag 'linux-kselftest-5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests/ftrace: Support ":README" suffix for requires
  selftests/ftrace: Support ":tracer" suffix for requires
  selftests/ftrace: Convert check_filter_file() with requires list
  selftests/ftrace: Convert required interface checks into requires list
  selftests/ftrace: Add "requires:" list support
  selftests/ftrace: Return unsupported for the unconfigured features
  selftests/ftrace: Allow ":" in description
  tools: testing: ftrace: trigger: fix spelling mistake

80 files changed, 123 insertions, 637 deletions

diff --git a/tools/testing/selftests/ftrace/ftracetest b/tools/testing/selftests/ftrace/ftracetest
index a4605b5ee66d..8ec1922e974e 100755
--- a/tools/testing/selftests/ftrace/ftracetest
+++ b/tools/testing/selftests/ftrace/ftracetest
@@ -263,10 +263,16 @@ CASENO=0
 
 testcase() { # testfile
   CASENO=$((CASENO+1))
-  desc=`grep "^#[ \t]*description:" $1 | cut -f2 -d:`
+  desc=`grep "^#[ \t]*description:" $1 | cut -f2- -d:`
   prlog -n "[$CASENO]$INSTANCE$desc"
 }
 
+checkreq() { # testfile
+  requires=`grep "^#[ \t]*requires:" $1 | cut -f2- -d:`
+  # Use eval to pass quoted-patterns correctly.
+  eval check_requires "$requires"
+}
+
 test_on_instance() { # testfile
   grep -q "^#[ \t]*flags:.*instance" $1
 }
@@ -356,7 +362,8 @@ trap 'SIG_RESULT=$XFAIL' $SIG_XFAIL
 
 __run_test() { # testfile
   # setup PID and PPID, $$ is not updated.
-  (cd $TRACING_DIR; read PID _ < /proc/self/stat; set -e; set -x; initialize_ftrace; . $1)
+  (cd $TRACING_DIR; read PID _ < /proc/self/stat; set -e; set -x;
+   checkreq $1; initialize_ftrace; . $1)
   [ $? -ne 0 ] && kill -s $SIG_FAIL $SIG_PID
 }
 
diff --git a/tools/testing/selftests/ftrace/test.d/00basic/snapshot.tc b/tools/testing/selftests/ftrace/test.d/00basic/snapshot.tc
index 3b1f45e13a2e..13b4dabcf46e 100644
--- a/tools/testing/selftests/ftrace/test.d/00basic/snapshot.tc
+++ b/tools/testing/selftests/ftrace/test.d/00basic/snapshot.tc
@@ -1,9 +1,8 @@
 #!/bin/sh
 # description: Snapshot and tracing setting
+# requires: snapshot
 # flags: instance
 
-[ ! -f snapshot ] && exit_unsupported
-
 echo "Set tracing off"
 echo 0 > tracing_on
 
diff --git a/tools/testing/selftests/ftrace/test.d/00basic/trace_pipe.tc b/tools/testing/selftests/ftrace/test.d/00basic/trace_pipe.tc
index 5058fbcfd90f..435d07b13407 100644
--- a/tools/testing/selftests/ftrace/test.d/00basic/trace_pipe.tc
+++ b/tools/testing/selftests/ftrace/test.d/00basic/trace_pipe.tc
@@ -1,10 +1,9 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0
 # description: trace_pipe and trace_marker
+# requires: trace_marker
 # flags: instance
 
-[ ! -f trace_marker ] && exit_unsupported
-
 echo "test input 1" > trace_marker
 
 : "trace interface never consume the ring buffer"
diff --git a/tools/testing/selftests/ftrace/test.d/direct/kprobe-direct.tc b/tools/testing/selftests/ftrace/test.d/direct/kprobe-direct.tc
index 801ecb63e84c..e52e470a1f8f 100644
--- a/tools/testing/selftests/ftrace/test.d/direct/kprobe-direct.tc
+++ b/tools/testing/selftests/ftrace/test.d/direct/kprobe-direct.tc
@@ -1,6 +1,7 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0
 # description: Test ftrace direct functions against kprobes
+# requires: kprobe_events
 
 rmmod ftrace-direct ||:
 if ! modprobe ftrace-direct ; then
@@ -8,11 +9,6 @@ if ! modprobe ftrace-direct ; then
   exit_unresolved;
 fi
 
-if [ ! -f kprobe_events ]; then
-	echo "No kprobe_events file -please build CONFIG_KPROBE_EVENTS"
-	exit_unresolved;
-fi
-
 echo "Let the module run a little"
 sleep 1
 
diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_kprobe.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_kprobe.tc
index c6d8387dbbb8..68550f97d3c3 100644
--- a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_kprobe.tc
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_kprobe.tc
@@ -1,11 +1,7 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0
 # description: Generic dynamic event - add/remove kprobe events
-
-[ -f dynamic_events ] || exit_unsupported
-
-grep -q "place: \[<module>:\]<symbol>" README || exit_unsupported
-grep -q "place (kretprobe): \[<module>:\]<symbol>" README || exit_unsupported
+# requires: dynamic_events "place: [<module>:]<symbol>":README "place (kretprobe): [<module>:]<symbol>":README
 
 echo 0 > events/enable
 echo > dynamic_events
diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_synth.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_synth.tc
index 62b77b5941d0..2b94611e1a28 100644
--- a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_synth.tc
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_synth.tc
@@ -1,10 +1,7 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0
 # description: Generic dynamic event - add/remove synthetic events
-
-[ -f dynamic_events ] || exit_unsupported
-
-grep -q "s:\[synthetic/\]" README || exit_unsupported
+# requires: dynamic_events "s:[synthetic/]":README
 
 echo 0 > events/enable
 echo > dynamic_events
diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/clear_select_events.tc b/tools/testing/selftests/ftrace/test.d/dynevent/clear_select_events.tc
index e0842109cb57..c969be9eb7de 100644
--- a/tools/testing/selftests/ftrace/test.d/dynevent/clear_select_events.tc
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/clear_select_events.tc
@@ -1,16 +1,7 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0
 # description: Generic dynamic event - selective clear (compatibility)
-
-[ -f dynamic_events ] || exit_unsupported
-
-grep -q "place: \[<module>:\]<symbol>" README || exit_unsupported
-grep -q "place (kretprobe): \[<module>:\]<symbol>" README || exit_unsupported
-
-grep -q "s:\[synthetic/\]" README || exit_unsupported
-
-[ -f synthetic_events ] || exit_unsupported
-[ -f kprobe_events ] || exit_unsupported
+# requires: dynamic_events kprobe_events synthetic_events "place: [<module>:]<symbol>":README "place (kretprobe): [<module>:]<symbol>":README "s:[synthetic/]":README
 
 echo 0 > events/enable
 echo > dynamic_events
diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/generic_clear_event.tc b/tools/testing/selftests/ftrace/test.d/dynevent/generic_clear_event.tc
index 901922e97878..16d543eaac88 100644
--- a/tools/testing/selftests/ftrace/test.d/dynevent/generic_clear_event.tc
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/generic_clear_event.tc
@@ -1,13 +1,7 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0
 # description: Generic dynamic event - generic clear event
-
-[ -f dynamic_events ] || exit_unsupported
-
-grep -q "place: \[<module>:\]<symbol>" README || exit_unsupported
-grep -q "place (kretprobe): \[<module>:\]<symbol>" README || exit_unsupported
-
-grep -q "s:\[synthetic/\]" README || exit_unsupported
+# requires: dynamic_events "place: [<module>:]<symbol>":README "place (kretprobe): [<module>:]<symbol>":README "s:[synthetic/]":README
 
 echo 0 > events/enable
 echo > dynamic_events
diff --git a/tools/testing/selftests/ftrace/test.d/event/event-enable.tc b/tools/testing/selftests/ftrace/test.d/event/event-enable.tc
index dfb0d5122f7b..cfe5bd2d4267 100644
--- a/tools/testing/selftests/ftrace/test.d/event/event-enable.tc
+++ b/tools/testing/selftests/ftrace/test.d/event/event-enable.tc
@@ -1,6 +1,7 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0
 # description: event tracing - enable/disable with event level files
+# requires: set_event events/sched
 # flags: instance
 
 do_reset() {
@@ -13,11 +14,6 @@ fail() { #msg
     exit_fail
 }
 
-if [ ! -f set_event -o ! -d events/sched ]; then
-    echo "event tracing is not supported"
-    exit_unsupported
-fi
-
 echo 'sched:sched_switch' > set_event
 
 yield
diff --git a/tools/testing/selftests/ftrace/test.d/event/event-no-pid.tc b/tools/testing/selftests/ftrace/test.d/event/event-no-pid.tc
index f0f366f18d0c..e6eb78f0b954 100644
--- a/tools/testing/selftests/ftrace/test.d/event/event-no-pid.tc
+++ b/tools/testing/selftests/ftrace/test.d/event/event-no-pid.tc
@@ -1,6 +1,7 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0
 # description: event tracing - restricts events based on pid notrace filtering
+# requires: set_event events/sched set_event_pid set_event_notrace_pid
 # flags: instance
 
 do_reset() {
@@ -56,16 +57,6 @@ enable_events() {
     echo 1 > tracing_on
 }
 
-if [ ! -f set_event -o ! -d events/sched ]; then
-    echo "event tracing is not supported"
-    exit_unsupported
-fi
-
-if [ ! -f set_event_pid -o ! -f set_event_notrace_pid ]; then
-    echo "event pid notrace filtering is not supported"
-    exit_unsupported
-fi
-
 echo 0 >