Merge tag 'linux_kselftest-next-6.7-rc1' of...

Merge tag 'linux_kselftest-next-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kselftest updates from Shuah Khan:

 - kbuild kselftest-merge target fixes

 - fixes to several tests

 - resctrl test fixes and enhancements

 - ksft_perror() helper and reporting improvements

 - printf attribute to kselftest prints to improve reporting

 - documentation and clang build warning fixes

The bulk of the patches are for resctrl fixes and enhancements.

* tag 'linux_kselftest-next-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (51 commits)
  selftests/resctrl: Fix MBM test failure when MBA unavailable
  selftests/clone3: Report descriptive test names
  selftests:modify the incorrect print format
  selftests/efivarfs: create-read: fix a resource leak
  selftests/ftrace: Add riscv support for kprobe arg tests
  selftests/ftrace: add loongarch support for kprobe args char tests
  selftests/amd-pstate: Added option to provide perf binary path
  selftests/amd-pstate: Fix broken paths to run workloads in amd-pstate-ut
  selftests/resctrl: Move run_benchmark() to a more fitting file
  selftests/resctrl: Fix schemata write error check
  selftests/resctrl: Reduce failures due to outliers in MBA/MBM tests
  selftests/resctrl: Fix feature checks
  selftests/resctrl: Refactor feature check to use resource and feature name
  selftests/resctrl: Move _GNU_SOURCE define into Makefile
  selftests/resctrl: Remove duplicate feature check from CMT test
  selftests/resctrl: Extend signal handler coverage to unmount on receiving signal
  selftests/resctrl: Fix uninitialized .sa_flags
  selftests/resctrl: Cleanup benchmark argument parsing
  selftests/resctrl: Remove ben_count variable
  selftests/resctrl: Make benchmark command const and build it with pointers
  ...

Documentation/dev-tools/kselftest.rst

@@ -112,7 +112,7 @@ You can specify multiple tests to skip::
 You can also specify a restricted list of tests to run together with a
 dedicated skiplist::
 
-  $  make TARGETS="bpf breakpoints size timers" SKIP_TARGETS=bpf kselftest
+  $  make TARGETS="breakpoints size timers" SKIP_TARGETS=size kselftest
 
 See the top-level tools/testing/selftests/Makefile for the list of all
 possible targets.
@@ -165,7 +165,7 @@ To see the list of available tests, the `-l` option can be used::
 The `-c` option can be used to run all the tests from a test collection, or
 the `-t` option for specific single tests. Either can be used multiple times::
 
-   $ ./run_kselftest.sh -c bpf -c seccomp -t timers:posix_timers -t timer:nanosleep
+   $ ./run_kselftest.sh -c size -c seccomp -t timers:posix_timers -t timer:nanosleep
 
 For other features see the script usage output, seen with the `-h` option.
 
@@ -210,7 +210,7 @@ option is supported, such as::
 tests by using variables specified in `Running a subset of selftests`_
 section::
 
-    $ make -C tools/testing/selftests gen_tar TARGETS="bpf" FORMAT=.xz
+    $ make -C tools/testing/selftests gen_tar TARGETS="size" FORMAT=.xz
 
 .. _tar's auto-compress: https://www.gnu.org/software/tar/manual/html_node/gzip.html#auto_002dcompress
 

Makefile

@@ -1367,8 +1367,8 @@ kselftest-%: headers FORCE
 PHONY += kselftest-merge
 kselftest-merge:
 	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
-	$(Q)find $(srctree)/tools/testing/selftests -name config | \
-		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
+	$(Q)find $(srctree)/tools/testing/selftests -name config -o -name config.$(UTS_MACHINE) | \
+		xargs $(srctree)/scripts/kconfig/merge_config.sh -y -m $(objtree)/.config
 	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 
 # ---------------------------------------------------------------------------

tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py

@@ -30,8 +30,7 @@ import getopt
 import Gnuplot
 from numpy import *
 from decimal import *
-sys.path.append('../intel_pstate_tracer')
-#import intel_pstate_tracer
+sys.path.append(os.path.join(os.path.dirname(__file__), "..", "intel_pstate_tracer"))
 import intel_pstate_tracer as ipt
 
 __license__ = "GPL version 2"

tools/testing/selftests/amd-pstate/gitsource.sh

-#!/bin/sh
+#!/bin/bash
 # SPDX-License-Identifier: GPL-2.0
 
 # Testing and monitor the cpu desire performance, frequency, load,
@@ -66,12 +66,15 @@ post_clear_gitsource()
 
 install_gitsource()
 {
-	if [ ! -d $git_name ]; then
+	if [ ! -d $SCRIPTDIR/$git_name ]; then
+		pushd $(pwd) > /dev/null 2>&1
+		cd $SCRIPTDIR
 		printf "Download gitsource, please wait a moment ...\n\n"
 		wget -O $git_tar $gitsource_url > /dev/null 2>&1
 
 		printf "Tar gitsource ...\n\n"
 		tar -xzf $git_tar
+		popd > /dev/null 2>&1
 	fi
 }
 
@@ -79,12 +82,14 @@ install_gitsource()
 run_gitsource()
 {
 	echo "Launching amd pstate tracer for $1 #$2 tracer_interval: $TRACER_INTERVAL"
-	./amd_pstate_trace.py -n tracer-gitsource-$1-$2 -i $TRACER_INTERVAL > /dev/null 2>&1 &
+	$TRACER -n tracer-gitsource-$1-$2 -i $TRACER_INTERVAL > /dev/null 2>&1 &
 
 	printf "Make and test gitsource for $1 #$2 make_cpus: $MAKE_CPUS\n"
-	cd $git_name
-	perf stat -a --per-socket -I 1000 -e power/energy-pkg/ /usr/bin/time -o ../$OUTFILE_GIT.time-gitsource-$1-$2.log make test -j$MAKE_CPUS > ../$OUTFILE_GIT-perf-$1-$2.log 2>&1
-	cd ..
+	BACKUP_DIR=$(pwd)
+	pushd $BACKUP_DIR > /dev/null 2>&1
+	cd $SCRIPTDIR/$git_name
+	$PERF stat -a --per-socket -I 1000 -e power/energy-pkg/ /usr/bin/time -o $BACKUP_DIR/$OUTFILE_GIT.time-gitsource-$1-$2.log make test -j$MAKE_CPUS > $BACKUP_DIR/$OUTFILE_GIT-perf-$1-$2.log 2>&1
+	popd > /dev/null 2>&1
 
 	for job in `jobs -p`
 	do

tools/testing/selftests/amd-pstate/run.sh

@@ -8,9 +8,12 @@ else
 	FILE_MAIN=DONE
 fi
 
-source basic.sh
-source tbench.sh
-source gitsource.sh
+SCRIPTDIR=`dirname "$0"`
+TRACER=$SCRIPTDIR/../../../power/x86/amd_pstate_tracer/amd_pstate_trace.py
+
+source $SCRIPTDIR/basic.sh
+source $SCRIPTDIR/tbench.sh
+source $SCRIPTDIR/gitsource.sh
 
 # amd-pstate-ut only run on x86/x86_64 AMD systems.
 ARCH=$(uname -m 2>/dev/null | sed -e 's/i.86/x86/' -e 's/x86_64/x86/')
@@ -22,6 +25,7 @@ OUTFILE=selftest
 OUTFILE_TBENCH="$OUTFILE.tbench"
 OUTFILE_GIT="$OUTFILE.gitsource"
 
+PERF=/usr/bin/perf
 SYSFS=
 CPUROOT=
 CPUFREQROOT=
@@ -151,6 +155,7 @@ help()
 	[-p <tbench process number>]
 	[-l <loop times for tbench>]
 	[-i <amd tracer interval>]
+	[-b <perf binary>]
 	[-m <comparative test: acpi-cpufreq>]
 	\n"
 	exit 2
@@ -158,7 +163,7 @@ help()
 
 parse_arguments()
 {
-	while getopts ho:c:t:p:l:i:m: arg
+	while getopts ho:c:t:p:l:i:b:m: arg
 	do
 		case $arg in
 			h) # --help
@@ -189,6 +194,10 @@ parse_arguments()
 				TRACER_INTERVAL=$OPTARG
 				;;
 
+			b) # --perf-binary
+				PERF=`realpath $OPTARG`
+				;;
+
 			m) # --comparative-test
 				COMPARATIVE_TEST=$OPTARG
 				;;
@@ -202,8 +211,8 @@ parse_arguments()
 
 command_perf()
 {
-	if ! command -v perf > /dev/null; then
-		echo $msg please install perf. >&2
+	if ! $PERF -v; then
+		echo $msg please install perf or provide perf binary path as argument >&2
 		exit $ksft_skip
 	fi
 }

tools/testing/selftests/amd-pstate/tbench.sh

@@ -64,11 +64,11 @@ post_clear_tbench()
 run_tbench()
 {
 	echo "Launching amd pstate tracer for $1 #$2 tracer_interval: $TRACER_INTERVAL"
-	./amd_pstate_trace.py -n tracer-tbench-$1-$2 -i $TRACER_INTERVAL > /dev/null 2>&1 &
+	$TRACER -n tracer-tbench-$1-$2 -i $TRACER_INTERVAL > /dev/null 2>&1 &
 
 	printf "Test tbench for $1 #$2 time_limit: $TIME_LIMIT procs_num: $PROCESS_NUM\n"
 	tbench_srv > /dev/null 2>&1 &
-	perf stat -a --per-socket -I 1000 -e power/energy-pkg/ tbench -t $TIME_LIMIT $PROCESS_NUM > $OUTFILE_TBENCH-perf-$1-$2.log 2>&1
+	$PERF stat -a --per-socket -I 1000 -e power/energy-pkg/ tbench -t $TIME_LIMIT $PROCESS_NUM > $OUTFILE_TBENCH-perf-$1-$2.log 2>&1
 
 	pid=`pidof tbench_srv`
 	kill $pid

tools/testing/selftests/cachestat/test_cachestat.c

@@ -27,7 +27,7 @@ static const char * const dev_files[] = {
 void print_cachestat(struct cachestat *cs)
 {
 	ksft_print_msg(
-	"Using cachestat: Cached: %lu, Dirty: %lu, Writeback: %lu, Evicted: %lu, Recently Evicted: %lu\n",
+	"Using cachestat: Cached: %llu, Dirty: %llu, Writeback: %llu, Evicted: %llu, Recently Evicted: %llu\n",
 	cs->nr_cache, cs->nr_dirty, cs->nr_writeback,
 	cs->nr_evicted, cs->nr_recently_evicted);
 }

tools/testing/selftests/capabilities/Makefile

@@ -2,7 +2,7 @@
 TEST_GEN_FILES := validate_cap
 TEST_GEN_PROGS := test_execve
 
-CFLAGS += -O2 -g -std=gnu99 -Wall
+CFLAGS += -O2 -g -std=gnu99 -Wall $(KHDR_INCLUDES)
 LDLIBS += -lcap-ng -lrt -ldl
 
 include ../lib.mk

tools/testing/selftests/capabilities/test_execve.c

@@ -20,14 +20,6 @@
 
 #include "../kselftest.h"
 
-#ifndef PR_CAP_AMBIENT
-#define PR_CAP_AMBIENT			47
-# define PR_CAP_AMBIENT_IS_SET		1
-# define PR_CAP_AMBIENT_RAISE		2
-# define PR_CAP_AMBIENT_LOWER		3
-# define PR_CAP_AMBIENT_CLEAR_ALL	4
-#endif
-
 static int nerrs;
 static pid_t mpid;	/*  main() pid is used to avoid duplicate test counts */
 

tools/testing/selftests/capabilities/validate_cap.c

@@ -9,14 +9,6 @@
 
 #include "../kselftest.h"
 
-#ifndef PR_CAP_AMBIENT
-#define PR_CAP_AMBIENT			47
-# define PR_CAP_AMBIENT_IS_SET		1
-# define PR_CAP_AMBIENT_RAISE		2
-# define PR_CAP_AMBIENT_LOWER		3
-# define PR_CAP_AMBIENT_CLEAR_ALL	4
-#endif
-
 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 19)
 # define HAVE_GETAUXVAL
 #endif

tools/testing/selftests/clone3/clone3.c

@@ -7,6 +7,7 @@
 #include <inttypes.h>
 #include <linux/types.h>
 #include <linux/sched.h>
+#include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -103,7 +104,7 @@ static int call_clone3(uint64_t flags, size_t size, enum test_mode test_mode)
 	return 0;
 }
 
-static void test_clone3(uint64_t flags, size_t size, int expected,
+static bool test_clone3(uint64_t flags, size_t size, int expected,
 			enum test_mode test_mode)
 {
 	int ret;
@@ -114,92 +115,210 @@ static void test_clone3(uint64_t flags, size_t size, int expected,
 	ret = call_clone3(flags, size, test_mode);
 	ksft_print_msg("[%d] clone3() with flags says: %d expected %d\n",
 			getpid(), ret, expected);
-	if (ret != expected)
-		ksft_test_result_fail(
+	if (ret != expected) {
+		ksft_print_msg(
 			"[%d] Result (%d) is different than expected (%d)\n",
 			getpid(), ret, expected);
-	else
-		ksft_test_result_pass(
-			"[%d] Result (%d) matches expectation (%d)\n",
-			getpid(), ret, expected);
-}
-
-int main(int argc, char *argv[])
-{
-	uid_t uid = getuid();
-
-	ksft_print_header();
-	ksft_set_plan(19);
-	test_clone3_supported();
-
-	/* Just a simple clone3() should return 0.*/
-	test_clone3(0, 0, 0, CLONE3_ARGS_NO_TEST);
-
-	/* Do a clone3() in a new PID NS.*/
-	if (uid == 0)
-		test_clone3(CLONE_NEWPID, 0, 0, CLONE3_ARGS_NO_TEST);
-	else
-		ksft_test_result_skip("Skipping clone3() with CLONE_NEWPID\n");
-
-	/* Do a clone3() with CLONE_ARGS_SIZE_VER0. */
-	test_clone3(0, CLONE_ARGS_SIZE_VER0, 0, CLONE3_ARGS_NO_TEST);
-
-	/* Do a clone3() with CLONE_ARGS_SIZE_VER0 - 8 */
-	test_clone3(0, CLONE_ARGS_SIZE_VER0 - 8, -EINVAL, CLONE3_ARGS_NO_TEST);
-
-	/* Do a clone3() with sizeof(struct clone_args) + 8 */
-	test_clone3(0, sizeof(struct __clone_args) + 8, 0, CLONE3_ARGS_NO_TEST);
+		return false;
+	}
 
-	/* Do a clone3() with exit_signal having highest 32 bits non-zero */
-	test_clone3(0, 0, -EINVAL, CLONE3_ARGS_INVAL_EXIT_SIGNAL_BIG);
+	return true;
+}
 
-	/* Do a clone3() with negative 32-bit exit_signal */
-	test_clone3(0, 0, -EINVAL, CLONE3_ARGS_INVAL_EXIT_SIGNAL_NEG);
+typedef bool (*filter_function)(void);
+typedef size_t (*size_function)(void);
 
-	/* Do a clone3() with exit_signal not fitting into CSIGNAL mask */
-	test_clone3(0, 0, -EINVAL, CLONE3_ARGS_INVAL_EXIT_SIGNAL_CSIG);
+static bool not_root(void)
+{
+	if (getuid() != 0) {
+		ksft_print_msg("Not running as root\n");
+		return true;
+	}
 
-	/* Do a clone3() with NSIG < exit_signal < CSIG */
-	test_clone3(0, 0, -EINVAL, CLONE3_ARGS_INVAL_EXIT_SIGNAL_NSIG);
+	return false;
+}
 
-	test_clone3(0, sizeof(struct __clone_args) + 8, 0, CLONE3_ARGS_ALL_0);
+static size_t page_size_plus_8(void)
+{
+	return getpagesize() + 8;
+}
 
-	test_clone3(0, sizeof(struct __clone_args) + 16, -E2BIG,
-			CLONE3_ARGS_ALL_0);
+struct test {
+	const char *name;
+	uint64_t flags;
+	size_t size;
+	size_function size_function;
+	int expected;
+	enum test_mode test_mode;
+	filter_function filter;
+};
 
-	test_clone3(0, sizeof(struct __clone_args) * 2, -E2BIG,
-			CLONE3_ARGS_ALL_0);
+static const struct test tests[] = {
+	{
+		.name = "simple clone3()",
+		.flags = 0,
+		.size = 0,
+		.expected = 0,
+		.test_mode = CLONE3_ARGS_NO_TEST,
+	},
+	{
+		.name = "clone3() in a new PID_NS",
+		.flags = CLONE_NEWPID,
+		.size = 0,
+		.expected = 0,
+		.test_mode = CLONE3_ARGS_NO_TEST,
+		.filter = not_root,
+	},
+	{
+		.name = "CLONE_ARGS_SIZE_VER0",
+		.flags = 0,
+		.size = CLONE_ARGS_SIZE_VER0,
+		.expected = 0,
+		.test_mode = CLONE3_ARGS_NO_TEST,
+	},
+	{
+		.name = "CLONE_ARGS_SIZE_VER0 - 8",
+		.flags = 0,
+		.size = CLONE_ARGS_SIZE_VER0 - 8,
+		.expected = -EINVAL,
+		.test_mode = CLONE3_ARGS_NO_TEST,
+	},
+	{
+		.name = "sizeof(struct clone_args) + 8",
+		.flags = 0,
+		.size = sizeof(struct __clone_args) + 8,
+		.expected = 0,
+		.test_mode = CLONE3_ARGS_NO_TEST,
+	},
+	{
+		.name = "exit_signal with highest 32 bits non-zero",
+		.flags = 0,
+		.size = 0,
+		.expected = -EINVAL,
+		.test_mode = CLONE3_ARGS_INVAL_EXIT_SIGNAL_BIG,
+	},
+	{
+		.name = "negative 32-bit exit_signal",
+		.flags = 0,
+		.size = 0,
+		.expected = -EINVAL,
+		.test_mode = CLONE3_ARGS_INVAL_EXIT_SIGNAL_NEG,
+	},
+	{
+		.name = "exit_signal not fitting into CSIGNAL mask",
+		.flags = 0,
+		.size = 0,
+		.expected = -EINVAL,
+		.test_mode = CLONE3_ARGS_INVAL_EXIT_SIGNAL_CSIG,
+	},
+	{
+		.name = "NSIG < exit_signal < CSIG",
+		.flags = 0,
+		.size = 0,
+		.expected = -EINVAL,
+		.test_mode = CLONE3_ARGS_INVAL_EXIT_SIGNAL_NSIG,
+	},
+	{
+		.name = "Arguments sizeof(struct clone_args) + 8",
+		.flags = 0,
+		.size = sizeof(struct __clone_args) + 8,
+		.expected = 0,
+		.test_mode = CLONE3_ARGS_ALL_0,
+	},
+	{
+		.name = "Arguments sizeof(struct clone_args) + 16",
+		.flags = 0,
+		.size = sizeof(struct __clone_args) + 16,
+		.expected = -E2BIG,
+		.test_mode = CLONE3_ARGS_ALL_0,
+	},
+	{
+		.name = "Arguments sizeof(struct clone_arg) * 2",
+		.flags = 0,
+		.size = sizeof(struct __clone_args) + 16,
+		.expected = -E2BIG,
+		.test_mode = CLONE3_ARGS_ALL_0,
+	},
+	{
+		.name = "Arguments > page size",
+		.flags = 0,
+		.size_function = page_size_plus_8,
+		.expected = -E2BIG,
+		.test_mode = CLONE3_ARGS_NO_TEST,
+	},
+	{
+		.name = "CLONE_ARGS_SIZE_VER0 in a new PID NS",
+		.flags = CLONE_NEWPID,
+		.size = CLONE_ARGS_SIZE_VER0,
+		.expected = 0,
+		.test_mode = CLONE3_ARGS_NO_TEST,
+		.filter = not_root,
+	},
+	{
+		.name = "CLONE_ARGS_SIZE_VER0 - 8 in a new PID NS",
+		.flags = CLONE_NEWPID,
+		.size = CLONE_ARGS_SIZE_VER0 - 8,
+		.expected = -EINVAL,
+		.test_mode = CLONE3_ARGS_NO_TEST,
+	},
+	{
+		.name = "sizeof(struct clone_args) + 8 in a new PID NS",
+		.flags = CLONE_NEWPID,
+		.size = sizeof(struct __clone_args) + 8,
+		.expected = 0,
+		.test_mode = CLONE3_ARGS_NO_TEST,
+		.filter = not_root,
+	},
+	{
+		.name = "Arguments > page size in a new PID NS",
+		.flags = CLONE_NEWPID,
+		.size_function = page_size_plus_8,
+		.expected = -E2BIG,
+		.test_mode = CLONE3_ARGS_NO_TEST,
+	},
+	{
+		.name = "New time NS",
+		.flags = CLONE_NEWTIME,
+		.size = 0,
+		.expected = 0,
+		.test_mode = CLONE3_ARGS_NO_TEST,
+	},
+	{
+		.name = "exit signal (SIGCHLD) in flags",
+		.flags = SIGCHLD,
+		.size = 0,
+		.expected = -EINVAL,
+		.test_mode = CLONE3_ARGS_NO_TEST,
+	},
+};
 
-	/* Do a clone3() with > page size */
-	test_clone3(0, getpagesize() + 8, -E2BIG, CLONE3_ARGS_NO_TEST);
+int main(int argc, char *argv[])
+{
+	size_t size;
+	int i;
 
-	/* Do a clone3() with CLONE_ARGS_SIZE_VER0 in a new PID NS. */
-	if (uid == 0)
-		test_clone3(CLONE_NEWPID, CLONE_ARGS_SIZE_VER0, 0,
-				CLONE3_ARGS_NO_TEST);
-	else
-		ksft_test_result_skip("Skipping clone3() with CLONE_NEWPID\n");
+	ksft_print_header();
+	ksft_set_plan(ARRAY_SIZE(tests));
+	test_clone3_supported();
 
-	/* Do a clone3() with CLONE_ARGS_SIZE_VER0 - 8 in a new PID NS */
-	test_clone3(CLONE_NEWPID, CLONE_ARGS_SIZE_VER0 - 8, -EINVAL,
-			CLONE3_ARGS_NO_TEST);
+	for (i = 0; i < ARRAY_SIZE(tests); i++) {
+		if (tests[i].filter && tests[i].filter()) {
+			ksft_test_result_skip("%s\n", tests[i].name);
+			continue;
+		}
 
-	/* Do a clone3() with sizeof(struct clone_args) + 8 in a new PID NS */
-	if (uid == 0)
-		test_clone3(CLONE_NEWPID, sizeof(struct __clone_args) + 8, 0,
-				CLONE3_ARGS_NO_TEST);
+		if (tests[i].size_function)
+			size = tests[i].size_function();
 		else
-		ksft_test_result_skip("Skipping clone3() with CLONE_NEWPID\n");
+			size = tests[i].size;
 
-	/* Do a clone3() with > page size in a new PID NS */
-	test_clone3(CLONE_NEWPID, getpagesize() + 8, -E2BIG,
-			CLONE3_ARGS_NO_TEST);
+		ksft_print_msg("Running test '%s'\n", tests[i].name);
 
-	/* Do a clone3() in a new time namespace */
-	test_clone3(CLONE_NEWTIME, 0, 0, CLONE3_ARGS_NO_TEST);
-
-	/* Do a clone3() with exit signal (SIGCHLD) in flags */
-	test_clone3(SIGCHLD, 0, -EINVAL, CLONE3_ARGS_NO_TEST);
+		ksft_test_result(test_clone3(tests[i].flags, size,
+					     tests[i].expected,
+					     tests[i].test_mode),
+				 "%s\n", tests[i].name);
+	}
 
 	ksft_finished();
 }

tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c

@@ -27,9 +27,7 @@
 #include "../kselftest_harness.h"
 #include "clone3_selftests.h"
 
-#ifndef MAX_PID_NS_LEVEL
 #define MAX_PID_NS_LEVEL 32
-#endif
 
 static void child_exit(int ret)
 {

tools/testing/selftests/clone3/clone3_clear_sighand.c

@@ -16,10 +16,6 @@
 #include "../kselftest.h"
 #include "clone3_selftests.h"
 
-#ifndef CLONE_CLEAR_SIGHAND
-#define CLONE_CLEAR_SIGHAND 0x100000000ULL
-#endif
-
 static void nop_handler(int signo)
 {
 }

tools/testing/selftests/clone3/clone3_selftests.h

@@ -15,10 +15,6 @@
 
 #define ptr_to_u64(ptr) ((__u64)((uintptr_t)(ptr)))
 
-#ifndef CLONE_INTO_CGROUP
-#define CLONE_INTO_CGROUP 0x200000000ULL /* Clone into a specific cgroup given the right permissions. */
-#endif
-
 #ifndef __NR_clone3
 #define __NR_clone3 -1
 #endif
@@ -32,18 +28,9 @@ struct __clone_args {
 	__aligned_u64 stack;
 	__aligned_u64 stack_size;
 	__aligned_u64 tls;
-#ifndef CLONE_ARGS_SIZE_VER0
-#define CLONE_ARGS_SIZE_VER0 64	/* sizeof first published struct */
-#endif
 	__aligned_u64 set_tid;
 	__aligned_u64 set_tid_size;
-#ifndef CLONE_ARGS_SIZE_VER1
-#define CLONE_ARGS_SIZE_VER1 80	/* sizeof second published struct */
-#endif
 	__aligned_u64 cgroup;
-#ifndef CLONE_ARGS_SIZE_VER2
-#define CLONE_ARGS_SIZE_VER2 88	/* sizeof third published struct */
-#endif
 };
 
 static pid_t sys_clone3(struct __clone_args *args, size_t size)

tools/testing/selftests/clone3/clone3_set_tid.c

@@ -23,9 +23,7 @@
 #include "../kselftest.h"
 #include "clone3_selftests.h"
 
-#ifndef MAX_PID_NS_LEVEL
 #define MAX_PID_NS_LEVEL 32
-#endif
 
 static int pipe_1[2];
 static int pipe_2[2];

tools/testing/selftests/core/close_range_test.c

@@ -16,34 +16,6 @@
 #include "../kselftest_harness.h"
 #include "../clone3/clone3_selftests.h"
 
-#ifndef __NR_close_range
-	#if defined __alpha__
-		#define __NR_close_range 546
-	#elif defined _MIPS_SIM
-		#if _MIPS_SIM == _MIPS_SIM_ABI32	/* o32 */
-			#define __NR_close_range (436 + 4000)
-		#endif
-		#if _MIPS_SIM == _MIPS_SIM_NABI32	/* n32 */
-			#define __NR_close_range (436 + 6000)
-		#endif
-		#if _MIPS_SIM == _MIPS_SIM_ABI64	/* n64 */
-			#define __NR_close_range (436 + 5000)
-		#endif
-	#elif defined __ia64__
-		#define __NR_close_range (436 + 1024)
-	#else
-		#define __NR_close_range 436
-	#endif
-#endif
-
-#ifndef CLOSE_RANGE_UNSHARE
-#define CLOSE_RANGE_UNSHARE	(1U << 1)
-#endif
-
-#ifndef CLOSE_RANGE_CLOEXEC
-#define CLOSE_RANGE_CLOEXEC	(1U << 2)
-#endif
-
 static inline int sys_close_range(unsigned int fd, unsigned int max_fd,
 				  unsigned int flags)
 {

tools/testing/selftests/dmabuf-heaps/.gitignore

+dmabuf-heap

tools/testing/selftests/efivarfs/create-read.c

@@ -32,8 +32,10 @@ int main(int argc, char **argv)
 	rc = read(fd, buf, sizeof(buf));
 	if (rc != 0) {
 		fprintf(stderr, "Reading a new var should return EOF\n");
+		close(fd);
 		return EXIT_FAILURE;
 	}
 
+	close(fd);
 	return EXIT_SUCCESS;
 }

tools/testing/selftests/exec/execveat.c

@@ -23,6 +23,9 @@
 
 #include "../kselftest.h"
 
+#define TESTS_EXPECTED 51
+#define TEST_NAME_LEN (PATH_MAX * 4)
+
 static char longpath[2 * PATH_MAX] = "";
 static char *envp[] = { "IN_TEST=yes", NULL, NULL };
 static char *argv[] = { "execveat", "99", NULL };
@@ -43,71 +46,85 @@ static int execveat_(int fd, const char *path, char **argv, char **envp,
 static int _check_execveat_fail(int fd, const char *path, int flags,
 				int expected_errno, const char *errno_str)
 {
+	char test_name[TEST_NAME_LEN];
 	int rc;
 
 	errno = 0;
-	printf("Check failure of execveat(%d, '%s', %d) with %s... ",
+	snprintf(test_name, sizeof(test_name),
+		 "Check failure of execveat(%d, '%s', %d) with %s",
 		 fd, path?:"(null)", flags, errno_str);
 	rc = execveat_(fd, path, argv, envp, flags);
 
 	if (rc > 0) {
-		printf("[FAIL] (unexpected success from execveat(2))\n");
+		ksft_print_msg("unexpected success from execveat(2)\n");
+		ksft_test_result_fail("%s\n", test_name);
 		return 1;
 	}
 	if (errno != expected_errno) {
-		printf("[FAIL] (expected errno %d (%s) not %d (%s)\n",
+		ksft_print_msg("expected errno %d (%s) not %d (%s)\n",
 			       expected_errno, strerror(expected_errno),
 			       errno, strerror(errno));
+		ksft_test_result_fail("%s\n", test_name);
 		return 1;
 	}
-	printf("[OK]\n");
+	ksft_test_result_pass("%s\n", test_name);
 	return 0;
 }
 
 static int check_execveat_invoked_rc(int fd, const char *path, int flags,
 				     int expected_rc, int expected_rc2)
 {
+	char test_name[TEST_NAME_LEN];
 	int status;
 	int rc;
 	pid_t child;
 	int pathlen = path ? strlen(path) : 0;
 
 	if (pathlen > 40)
-		printf("Check success of execveat(%d, '%.20s...%s', %d)... ",
+		snprintf(test_name, sizeof(test_name),
+			 "Check success of execveat(%d, '%.20s...%s', %d)... ",
 			 fd, path, (path + pathlen - 20), flags);
 	else
-		printf("Check success of execveat(%d, '%s', %d)... ",
+		snprintf(test_name, sizeof(test_name),
+			 "Check success of execveat(%d, '%s', %d)... ",
 			 fd, path?:"(null)", flags);
+
 	child = fork();
 	if (child < 0) {
-		printf("[FAIL] (fork() failed)\n");
+		ksft_perror("fork() failed");
+		ksft_test_result_fail("%s\n", test_name);
 		return 1;
 	}
 	if (child == 0) {
 		/* Child: do execveat(). */
 		rc = execveat_(fd, path, argv, envp, flags);
-		printf("[FAIL]: execveat() failed, rc=%d errno=%d (%s)\n",
+		ksft_print_msg("execveat() failed, rc=%d errno=%d (%s)\n",
 			       rc, errno, strerror(errno));
+		ksft_test_result_fail("%s\n", test_name);
 		exit(1);  /* should not reach here */
 	}
 	/* Parent: wait for & check child's exit status. */
 	rc = waitpid(child, &status, 0);
 	if (rc != child) {
-		printf("[FAIL] (waitpid(%d,...) returned %d)\n", child, rc);
+		ksft_print_msg("waitpid(%d,...) returned %d\n", child, rc);
+		ksft_test_result_fail("%s\n", test_name);
 		return 1;
 	}
 	if (!WIFEXITED(status)) {
-		printf("[FAIL] (child %d did not exit cleanly, status=%08x)\n",
+		ksft_print_msg("child %d did not exit cleanly, status=%08x\n",
 			       child, status);
+		ksft_test_result_fail("%s\n", test_name);
 		return 1;
 	}
 	if ((WEXITSTATUS(status) != expected_rc) &&
 	    (WEXITSTATUS(status) != expected_rc2)) {
-		printf("[FAIL] (child %d exited with %d not %d nor %d)\n",
-			child, WEXITSTATUS(status), expected_rc, expected_rc2);
+		ksft_print_msg("child %d exited with %d not %d nor %d\n",
+			       child, WEXITSTATUS(status), expected_rc,
+			       expected_rc2);
+		ksft_test_result_fail("%s\n", test_name);
 		return 1;
 	}
-	printf("[OK]\n");
+	ksft_test_result_pass("%s\n", test_name);
 	return 0;
 }
 
@@ -129,11 +146,9 @@ static int open_or_die(const char *filename, int flags)
 {
 	int fd = open(filename, flags);
 
-	if (fd < 0) {
-		printf("Failed to open '%s'; "
+	if (fd < 0)
+		ksft_exit_fail_msg("Failed to open '%s'; "
 			"check prerequisites are available\n", filename);
-		exit(1);
-	}
 	return fd;
 }
 
@@ -162,8 +177,7 @@ static int check_execveat_pathmax(int root_dfd, const char *src, int is_script)
 		char *cwd = getcwd(NULL, 0);
 
 		if (!cwd) {
-			printf("Failed to getcwd(), errno=%d (%s)\n",
-			       errno, strerror(errno));
+			ksft_perror("Failed to getcwd()");
 			return 2;
 		}
 		strcpy(longpath, cwd);
@@ -193,11 +207,11 @@ static int check_execveat_pathmax(int root_dfd, const char *src, int is_script)
 	 */
 	fd = open(longpath, O_RDONLY);
 	if (fd > 0) {
-		printf("Invoke copy of '%s' via filename of length %zu:\n",
+		ksft_print_msg("Invoke copy of '%s' via filename of length %zu:\n",
 			       src, strlen(longpath));
 		fail += check_execveat(fd, "", AT_EMPTY_PATH);
 	} else {
-		printf("Failed to open length %zu filename, errno=%d (%s)\n",
+		ksft_print_msg("Failed to open length %zu filename, errno=%d (%s)\n",
 			       strlen(longpath), errno, strerror(errno));
 		fail++;
 	}
@@ -405,28 +419,31 @@ int main(int argc, char **argv)
 		const char *in_test = getenv("IN_TEST");
 
 		if (verbose) {
-			printf("  invoked with:");
+			ksft_print_msg("invoked with:\n");
 			for (ii = 0; ii < argc; ii++)
-				printf(" [%d]='%s'", ii, argv[ii]);
-			printf("\n");
+				ksft_print_msg("\t[%d]='%s\n'", ii, argv[ii]);
 		}
 
 		/* Check expected environment transferred. */
 		if (!in_test || strcmp(in_test, "yes") != 0) {
-			printf("[FAIL] (no IN_TEST=yes in env)\n");
+			ksft_print_msg("no IN_TEST=yes in env\n");
 			return 1;
 		}
 
 		/* Use the final argument as an exit code. */
 		rc = atoi(argv[argc - 1]);
-		fflush(stdout);
+		exit(rc);
 	} else {
+		ksft_print_header();
+		ksft_set_plan(TESTS_EXPECTED);
 		prerequisites();
 		if (verbose)
 			envp[1] = "VERBOSE=1";
 		rc = run_tests();
 		if (rc > 0)
 			printf("%d tests failed\n", rc);
+		ksft_finished();
 	}
+
 	return rc;
 }

tools/testing/selftests/firmware/fw_namespace.c

@@ -17,10 +17,6 @@
 #include <sys/wait.h>
 #include <unistd.h>
 
-#ifndef CLONE_NEWNS
-# define CLONE_NEWNS 0x00020000
-#endif
-
 static char *fw_path = NULL;
 
 static void die(char *fmt, ...)

tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_char.tc

@@ -28,6 +28,12 @@ s390*)
 mips*)
   ARG1=%r4
 ;;
+loongarch*)
+  ARG1=%r4
+;;
+riscv*)
+  ARG1=%a0
+;;
 *)
   echo "Please implement other architecture here"
   exit_untested

tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_string.tc

@@ -31,6 +31,9 @@ mips*)
 loongarch*)
   ARG1=%r4
 ;;
+riscv*)
+  ARG1=%a0
+;;
 *)
   echo "Please implement other architecture here"
   exit_untested

tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_syntax.tc

@@ -44,6 +44,10 @@ loongarch*)
   GOODREG=%r4
   BADREG=%r12
 ;;
+riscv*)
+  GOODREG=%a0
+  BADREG=%a8
+;;
 *)
   echo "Please implement other architecture here"
   exit_untested

tools/testing/selftests/kselftest.h

@@ -48,6 +48,7 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <stdarg.h>
+#include <string.h>
 #include <stdio.h>
 #endif
 
@@ -77,6 +78,8 @@
 #define KSFT_XPASS 3
 #define KSFT_SKIP  4
 
+#define __printf(a, b)   __attribute__((format(printf, a, b)))
+
 /* counters */
 struct ksft_count {
 	unsigned int ksft_pass;
@@ -129,7 +132,7 @@ static inline void ksft_print_header(void)
 static inline void ksft_set_plan(unsigned int plan)
 {
 	ksft_plan = plan;
-	printf("1..%d\n", ksft_plan);
+	printf("1..%u\n", ksft_plan);
 }
 
 static inline void ksft_print_cnts(void)
@@ -137,13 +140,13 @@ static inline void ksft_print_cnts(void)
 	if (ksft_plan != ksft_test_num())
 		printf("# Planned tests != run tests (%u != %u)\n",
 			ksft_plan, ksft_test_num());
-	printf("# Totals: pass:%d fail:%d xfail:%d xpass:%d skip:%d error:%d\n",
+	printf("# Totals: pass:%u fail:%u xfail:%u xpass:%u skip:%u error:%u\n",
 		ksft_cnt.ksft_pass, ksft_cnt.ksft_fail,
 		ksft_cnt.ksft_xfail, ksft_cnt.ksft_xpass,
 		ksft_cnt.ksft_xskip, ksft_cnt.ksft_error);
 }
 
-static inline void ksft_print_msg(const char *msg, ...)
+static inline __printf(1, 2) void ksft_print_msg(const char *msg, ...)
 {
 	int saved_errno = errno;
 	va_list args;
@@ -155,7 +158,20 @@ static inline void ksft_print_msg(const char *msg, ...)
 	va_end(args);
 }
 
-static inline void ksft_test_result_pass(const char *msg, ...)
+static inline void ksft_perror(const char *msg)
+{
+#ifndef NOLIBC
+	ksft_print_msg("%s: %s (%d)\n", msg, strerror(errno), errno);
+#else
+	/*
+	 * nolibc doesn't provide strerror() and it seems
+	 * inappropriate to add one, just print the errno.
+	 */
+	ksft_print_msg("%s: %d)\n", msg, errno);
+#endif
+}
+
+static inline __printf(1, 2) void ksft_test_result_pass(const char *msg, ...)
 {
 	int saved_errno = errno;
 	va_list args;
@@ -163,13 +179,13 @@ static inline void ksft_test_result_pass(const char *msg, ...)
 	ksft_cnt.ksft_pass++;
 
 	va_start(args, msg);
-	printf("ok %d ", ksft_test_num());
+	printf("ok %u ", ksft_test_num());
 	errno = saved_errno;
 	vprintf(msg, args);
 	va_end(args);
 }
 
-static inline void ksft_test_result_fail(const char *msg, ...)
+static inline __printf(1, 2) void ksft_test_result_fail(const char *msg, ...)
 {
 	int saved_errno = errno;
 	va_list args;
@@ -177,7 +193,7 @@ static inline void ksft_test_result_fail(const char *msg, ...)
 	ksft_cnt.ksft_fail++;
 
 	va_start(args, msg);
-	printf("not ok %d ", ksft_test_num());
+	printf("not ok %u ", ksft_test_num());
 	errno = saved_errno;
 	vprintf(msg, args);
 	va_end(args);
@@ -195,7 +211,7 @@ static inline void ksft_test_result_fail(const char *msg, ...)
 		ksft_test_result_fail(fmt, ##__VA_ARGS__);\
 	} while (0)
 
-static inline void ksft_test_result_xfail(const char *msg, ...)
+static inline __printf(1, 2) void ksft_test_result_xfail(const char *msg, ...)
 {
 	int saved_errno = errno;
 	va_list args;
@@ -203,13 +219,13 @@ static inline void ksft_test_result_xfail(const char *msg, ...)
 	ksft_cnt.ksft_xfail++;
 
 	va_start(args, msg);
-	printf("ok %d # XFAIL ", ksft_test_num());
+	printf("ok %u # XFAIL ", ksft_test_num());
 	errno = saved_errno;
 	vprintf(msg, args);
 	va_end(args);
 }
 
-static inline void ksft_test_result_skip(const char *msg, ...)
+static inline __printf(1, 2) void ksft_test_result_skip(const char *msg, ...)
 {
 	int saved_errno = errno;
 	va_list args;
@@ -217,14 +233,14 @@ static inline void ksft_test_result_skip(const char *msg, ...)
 	ksft_cnt.ksft_xskip++;
 
 	va_start(args, msg);
-	printf("ok %d # SKIP ", ksft_test_num());
+	printf("ok %u # SKIP ", ksft_test_num());
 	errno = saved_errno;
 	vprintf(msg, args);
 	va_end(args);
 }
 
 /* TODO: how does "error" differ from "fail" or "skip"? */
-static inline void ksft_test_result_error(const char *msg, ...)
+static inline __printf(1, 2) void ksft_test_result_error(const char *msg, ...)
 {
 	int saved_errno = errno;
 	va_list args;
@@ -232,7 +248,7 @@ static inline void ksft_test_result_error(const char *msg, ...)
 	ksft_cnt.ksft_error++;
 
 	va_start(args, msg);
-	printf("not ok %d # error ", ksft_test_num());
+	printf("not ok %u # error ", ksft_test_num());
 	errno = saved_errno;
 	vprintf(msg, args);
 	va_end(args);
@@ -271,7 +287,7 @@ static inline int ksft_exit_fail(void)
 		  ksft_cnt.ksft_xfail +	\
 		  ksft_cnt.ksft_xskip)
 
-static inline int ksft_exit_fail_msg(const char *msg, ...)
+static inline __printf(1, 2) int ksft_exit_fail_msg(const char *msg, ...)
 {
 	int saved_errno = errno;
 	va_list args;
@@ -298,7 +314,7 @@ static inline int ksft_exit_xpass(void)
 	exit(KSFT_XPASS);
 }
 
-static inline int ksft_exit_skip(const char *msg, ...)
+static inline __printf(1, 2) int ksft_exit_skip(const char *msg, ...)
 {
 	int saved_errno = errno;
 	va_list args;

tools/testing/selftests/kvm/include/test_util.h

@@ -33,7 +33,7 @@ static inline int _no_printf(const char *format, ...) { return 0; }
 #define pr_info(...) _no_printf(__VA_ARGS__)
 #endif
 
-void print_skip(const char *fmt, ...) __attribute__((format(printf, 1, 2)));
+void __printf(1, 2) print_skip(const char *fmt, ...);
 #define __TEST_REQUIRE(f, fmt, ...)				\
 do {								\
 	if (!(f))						\
@@ -46,9 +46,9 @@ ssize_t test_write(int fd, const void *buf, size_t count);
 ssize_t test_read(int fd, void *buf, size_t count);
 int test_seq_read(const char *path, char **bufp, size_t *sizep);
 
-void test_assert(bool exp, const char *exp_str,
-		 const char *file, unsigned int line, const char *fmt, ...)
-		__attribute__((format(printf, 5, 6)));
+void __printf(5, 6) test_assert(bool exp, const char *exp_str,
+				const char *file, unsigned int line,
+				const char *fmt, ...);
 
 #define TEST_ASSERT(e, fmt, ...) \
 	test_assert((e), #e, __FILE__, __LINE__, fmt, ##__VA_ARGS__)

tools/testing/selftests/mm/mremap_test.c

@@ -338,7 +338,7 @@ static long long remap_region(struct config c, unsigned int threshold_mb,
 		char c = (char) rand();
 
 		if (((char *) dest_addr)[i] != c) {
-			ksft_print_msg("Data after remap doesn't match at offset %d\n",
+			ksft_print_msg("Data after remap doesn't match at offset %llu\n",
 				       i);
 			ksft_print_msg("Expected: %#x\t Got: %#x\n", c & 0xff,
 					((char *) dest_addr)[i] & 0xff);

tools/testing/selftests/mm/pkey-helpers.h

@@ -34,7 +34,7 @@ extern int test_nr;
 extern int iteration_nr;
 
 #ifdef __GNUC__
-__attribute__((format(printf, 1, 2)))
+__printf(1, 2)
 #endif
 static inline void sigsafe_printf(const char *format, ...)
 {

tools/testing/selftests/openat2/openat2_test.c

@@ -300,7 +300,7 @@ void test_openat2_flags(void)
 
 			ksft_print_msg("openat2 unexpectedly returned ");
 			if (fdpath)
-				ksft_print_msg("%d['%s'] with %X (!= %X)\n",
+				ksft_print_msg("%d['%s'] with %X (!= %llX)\n",
 					       fd, fdpath, fdflags,
 					       test->how.flags);
 			else

tools/testing/selftests/pidfd/pidfd_fdinfo_test.c

@@ -62,7 +62,7 @@ static void error_report(struct error *err, const char *test_name)
 		break;
 
 	case PIDFD_PASS:
-		ksft_test_result_pass("%s test: Passed\n");
+		ksft_test_result_pass("%s test: Passed\n", test_name);
 		break;
 
 	default:

tools/testing/selftests/pidfd/pidfd_test.c

@@ -381,13 +381,13 @@ static int test_pidfd_send_signal_syscall_support(void)
 
 static void *test_pidfd_poll_exec_thread(void *priv)
 {
-	ksft_print_msg("Child Thread: starting. pid %d tid %d ; and sleeping\n",
+	ksft_print_msg("Child Thread: starting. pid %d tid %ld ; and sleeping\n",
 			getpid(), syscall(SYS_gettid));
 	ksft_print_msg("Child Thread: doing exec of sleep\n");
 
 	execl("/bin/sleep", "sleep", str(CHILD_THREAD_MIN_WAIT), (char *)NULL);
 
-	ksft_print_msg("Child Thread: DONE. pid %d tid %d\n",
+	ksft_print_msg("Child Thread: DONE. pid %d tid %ld\n",
 			getpid(), syscall(SYS_gettid));
 	return NULL;
 }
@@ -427,7 +427,7 @@ static int child_poll_exec_test(void *args)
 {
 	pthread_t t1;
 
-	ksft_print_msg("Child (pidfd): starting. pid %d tid %d\n", getpid(),
+	ksft_print_msg("Child (pidfd): starting. pid %d tid %ld\n", getpid(),
 			syscall(SYS_gettid));
 	pthread_create(&t1, NULL, test_pidfd_poll_exec_thread, NULL);
 	/*
@@ -480,10 +480,10 @@ static void test_pidfd_poll_exec(int use_waitpid)
 
 static void *test_pidfd_poll_leader_exit_thread(void *priv)
 {
-	ksft_print_msg("Child Thread: starting. pid %d tid %d ; and sleeping\n",
+	ksft_print_msg("Child Thread: starting. pid %d tid %ld ; and sleeping\n",
 			getpid(), syscall(SYS_gettid));
 	sleep(CHILD_THREAD_MIN_WAIT);
-	ksft_print_msg("Child Thread: DONE. pid %d tid %d\n", getpid(), syscall(SYS_gettid));
+	ksft_print_msg("Child Thread: DONE. pid %d tid %ld\n", getpid(), syscall(SYS_gettid));
 	return NULL;
 }
 
@@ -492,7 +492,7 @@ static int child_poll_leader_exit_test(void *args)
 {
 	pthread_t t1, t2;
 
-	ksft_print_msg("Child: starting. pid %d tid %d\n", getpid(), syscall(SYS_gettid));
+	ksft_print_msg("Child: starting. pid %d tid %ld\n", getpid(), syscall(SYS_gettid));
 	pthread_create(&t1, NULL, test_pidfd_poll_leader_exit_thread, NULL);
 	pthread_create(&t2, NULL, test_pidfd_poll_leader_exit_thread, NULL);
 

tools/testing/selftests/resctrl/Makefile

 # SPDX-License-Identifier: GPL-2.0
 
-CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2
+CFLAGS = -g -Wall -O2 -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE
 CFLAGS += $(KHDR_INCLUDES)
 
 TEST_GEN_PROGS := resctrl_tests

tools/testing/selftests/resctrl/cache.c

@@ -205,10 +205,11 @@ int measure_cache_vals(struct resctrl_val_param *param, int bm_pid)
  * cache_val:		execute benchmark and measure LLC occupancy resctrl
  * and perf cache miss for the benchmark
  * @param:		parameters passed to cache_val()
+ * @span:		buffer size for the benchmark
  *
  * Return:		0 on success. non-zero on failure.
  */
-int cat_val(struct resctrl_val_param *param)
+int cat_val(struct resctrl_val_param *param, size_t span)
 {
 	int memflush = 1, operation = 0, ret = 0;
 	char *resctrl_val = param->resctrl_val;
@@ -245,7 +246,7 @@ int cat_val(struct resctrl_val_param *param)
 		if (ret)
 			break;
 
-		if (run_fill_buf(param->span, memflush, operation, true)) {
+		if (run_fill_buf(span, memflush, operation, true)) {
 			fprintf(stderr, "Error-running fill buffer\n");
 			ret = -1;
 			goto pe_close;
@@ -294,7 +295,7 @@ int show_cache_info(unsigned long sum_llc_val, int no_of_bits,
 	ret = platform && abs((int)diff_percent) > max_diff_percent &&
 	      (cmt ? (abs(avg_diff) > max_diff) : true);
 
-	ksft_print_msg("%s Check cache miss rate within %d%%\n",
+	ksft_print_msg("%s Check cache miss rate within %lu%%\n",
 		       ret ? "Fail:" : "Pass:", max_diff_percent);
 
 	ksft_print_msg("Percent diff=%d\n", abs((int)diff_percent));

tools/testing/selftests/resctrl/cat_test.c

@@ -41,7 +41,7 @@ static int cat_setup(struct resctrl_val_param *p)
 	return ret;
 }
 
-static int check_results(struct resctrl_val_param *param)
+static int check_results(struct resctrl_val_param *param, size_t span)
 {
 	char *token_array[8], temp[512];
 	unsigned long sum_llc_perf_miss = 0;
@@ -76,7 +76,7 @@ static int check_results(struct resctrl_val_param *param)
 	fclose(fp);
 	no_of_bits = count_bits(param->mask);
 
-	return show_cache_info(sum_llc_perf_miss, no_of_bits, param->span / 64,
+	return show_cache_info(sum_llc_perf_miss, no_of_bits, span / 64,
 			       MAX_DIFF, MAX_DIFF_PERCENT, runs - 1,
 			       get_vendor() == ARCH_INTEL, false);
 }
@@ -96,6 +96,7 @@ int cat_perf_miss_val(int cpu_no, int n, char *cache_type)
 	char cbm_mask[256];
 	int count_of_bits;
 	char pipe_message;
+	size_t span;
 
 	/* Get default cbm mask for L3/L2 cache */
 	ret = get_cbm_mask(cache_type, cbm_mask);
@@ -140,7 +141,7 @@ int cat_perf_miss_val(int cpu_no, int n, char *cache_type)
 	/* Set param values for parent thread which will be allocated bitmask
 	 * with (max_bits - n) bits
 	 */
-	param.span = cache_size * (count_of_bits - n) / count_of_bits;
+	span = cache_size * (count_of_bits - n) / count_of_bits;
 	strcpy(param.ctrlgrp, "c2");
 	strcpy(param.mongrp, "m2");
 	strcpy(param.filename, RESULT_FILE_NAME2);
@@ -162,23 +163,17 @@ int cat_perf_miss_val(int cpu_no, int n, char *cache_type)
 		param.mask = l_mask_1;
 		strcpy(param.ctrlgrp, "c1");
 		strcpy(param.mongrp, "m1");
-		param.span = cache_size * n / count_of_bits;
+		span = cache_size * n / count_of_bits;
 		strcpy(param.filename, RESULT_FILE_NAME1);
 		param.num_of_runs = 0;
 		param.cpu_no = sibling_cpu_no;
-	} else {
-		ret = signal_handler_register();
-		if (ret) {
-			kill(bm_pid, SIGKILL);
-			goto out;
-		}
 	}
 
 	remove(param.filename);
 
-	ret = cat_val(&param);
+	ret = cat_val(&param, span);
 	if (ret == 0)
-		ret = check_results(&param);
+		ret = check_results(&param, span);
 
 	if (bm_pid == 0) {
 		/* Tell parent that child is ready */
@@ -208,10 +203,8 @@ int cat_perf_miss_val(int cpu_no, int n, char *cache_type)
 		}
 		close(pipefd[0]);
 		kill(bm_pid, SIGKILL);
-		signal_handler_unregister();
 	}
 
-out:
 	cat_test_cleanup();
 
 	return ret;

tools/testing/selftests/resctrl/cmt_test.c

@@ -27,7 +27,7 @@ static int cmt_setup(struct resctrl_val_param *p)
 	return 0;
 }
 
-static int check_results(struct resctrl_val_param *param, int no_of_bits)
+static int check_results(struct resctrl_val_param *param, size_t span, int no_of_bits)
 {
 	char *token_array[8], temp[512];
 	unsigned long sum_llc_occu_resc = 0;
@@ -58,7 +58,7 @@ static int check_results(struct resctrl_val_param *param, int no_of_bits)
 	}
 	fclose(fp);
 
-	return show_cache_info(sum_llc_occu_resc, no_of_bits, param->span,
+	return show_cache_info(sum_llc_occu_resc, no_of_bits, span,
 			       MAX_DIFF, MAX_DIFF_PERCENT, runs - 1,
 			       true, true);
 }
@@ -68,16 +68,17 @@ void cmt_test_cleanup(void)
 	remove(RESULT_FILE_NAME);
 }
 
-int cmt_resctrl_val(int cpu_no, int n, char **benchmark_cmd)
+int cmt_resctrl_val(int cpu_no, int n, const char * const *benchmark_cmd)
 {
+	const char * const *cmd = benchmark_cmd;
+	const char *new_cmd[BENCHMARK_ARGS];
 	unsigned long cache_size = 0;
 	unsigned long long_mask;
+	char *span_str = NULL;
 	char cbm_mask[256];
 	int count_of_bits;
-	int ret;
-
-	if (!validate_resctrl_feature_request(CMT_STR))
-		return -1;
+	size_t span;
+	int ret, i;
 
 	ret = get_cbm_mask("L3", cbm_mask);
 	if (ret)
@@ -105,24 +106,36 @@ int cmt_resctrl_val(int cpu_no, int n, char **benchmark_cmd)
 		.cpu_no		= cpu_no,
 		.filename	= RESULT_FILE_NAME,
 		.mask		= ~(long_mask << n) & long_mask,
-		.span		= cache_size * n / count_of_bits,
 		.num_of_runs	= 0,
 		.setup		= cmt_setup,
 	};
 
-	if (strcmp(benchmark_cmd[0], "fill_buf") == 0)
-		sprintf(benchmark_cmd[1], "%zu", param.span);
+	span = cache_size * n / count_of_bits;
+
+	if (strcmp(cmd[0], "fill_buf") == 0) {
+		/* Duplicate the command to be able to replace span in it */
+		for (i = 0; benchmark_cmd[i]; i++)
+			new_cmd[i] = benchmark_cmd[i];
+		new_cmd[i] = NULL;
+
+		ret = asprintf(&span_str, "%zu", span);
+		if (ret < 0)
+			return -1;
+		new_cmd[1] = span_str;
+		cmd = new_cmd;
+	}
 
 	remove(RESULT_FILE_NAME);
 
-	ret = resctrl_val(benchmark_cmd, &param);
+	ret = resctrl_val(cmd, &param);
 	if (ret)
 		goto out;
 
-	ret = check_results(&param, n);
+	ret = check_results(&param, span, n);
 
 out:
 	cmt_test_cleanup();
+	free(span_str);
 
 	return ret;
 }

tools/testing/selftests/resctrl/mba_test.c

@@ -12,7 +12,7 @@
 
 #define RESULT_FILE_NAME	"result_mba"
 #define NUM_OF_RUNS		5
-#define MAX_DIFF_PERCENT	5
+#define MAX_DIFF_PERCENT	8
 #define ALLOCATION_MAX		100
 #define ALLOCATION_MIN		10
 #define ALLOCATION_STEP		10
@@ -141,7 +141,7 @@ void mba_test_cleanup(void)
 	remove(RESULT_FILE_NAME);
 }
 
-int mba_schemata_change(int cpu_no, char *bw_report, char **benchmark_cmd)
+int mba_schemata_change(int cpu_no, const char * const *benchmark_cmd)
 {
 	struct resctrl_val_param param = {
 		.resctrl_val	= MBA_STR,
@@ -149,7 +149,7 @@ int mba_schemata_change(int cpu_no, char *bw_report, char **benchmark_cmd)
 		.mongrp		= "m1",
 		.cpu_no		= cpu_no,
 		.filename	= RESULT_FILE_NAME,
-		.bw_report	= bw_report,
+		.bw_report	= "reads",
 		.setup		= mba_setup
 	};
 	int ret;

tools/testing/selftests/resctrl/mbm_test.c

@@ -11,7 +11,7 @@
 #include "resctrl.h"
 
 #define RESULT_FILE_NAME	"result_mbm"
-#define MAX_DIFF_PERCENT	5
+#define MAX_DIFF_PERCENT	8
 #define NUM_OF_RUNS		5
 
 static int
@@ -95,7 +95,7 @@ static int mbm_setup(struct resctrl_val_param *p)
 		return END_OF_TESTS;
 
 	/* Set up shemata with 100% allocation on the first run. */
-	if (p->num_of_runs == 0)
+	if (p->num_of_runs == 0 && validate_resctrl_feature_request("MB", NULL))
 		ret = write_schemata(p->ctrlgrp, "100", p->cpu_no,
 				     p->resctrl_val);
 
@@ -109,16 +109,15 @@ void mbm_test_cleanup(void)
 	remove(RESULT_FILE_NAME);
 }
 
-int mbm_bw_change(size_t span, int cpu_no, char *bw_report, char **benchmark_cmd)
+int mbm_bw_change(int cpu_no, const char * const *benchmark_cmd)
 {
 	struct resctrl_val_param param = {
 		.resctrl_val	= MBM_STR,
 		.ctrlgrp	= "c1",
 		.mongrp		= "m1",
-		.span		= span,
 		.cpu_no		= cpu_no,
 		.filename	= RESULT_FILE_NAME,
-		.bw_report	=  bw_report,
+		.bw_report	= "reads",
 		.setup		= mbm_setup
 	};
 	int ret;
@@ -129,7 +128,7 @@ int mbm_bw_change(size_t span, int cpu_no, char *bw_report, char **benchmark_cmd
 	if (ret)
 		goto out;
 
-	ret = check_results(span);
+	ret = check_results(DEFAULT_SPAN);
 
 out:
 	mbm_test_cleanup();

tools/testing/selftests/resctrl/resctrl.h

 /* SPDX-License-Identifier: GPL-2.0 */
-#define _GNU_SOURCE
 #ifndef RESCTRL_H
 #define RESCTRL_H
 #include <stdio.h>
@@ -28,16 +27,16 @@
 #define RESCTRL_PATH		"/sys/fs/resctrl"
 #define PHYS_ID_PATH		"/sys/devices/system/cpu/cpu"
 #define INFO_PATH		"/sys/fs/resctrl/info"
-#define L3_PATH			"/sys/fs/resctrl/info/L3"
-#define MB_PATH			"/sys/fs/resctrl/info/MB"
-#define L3_MON_PATH		"/sys/fs/resctrl/info/L3_MON"
-#define L3_MON_FEATURES_PATH	"/sys/fs/resctrl/info/L3_MON/mon_features"
 
 #define ARCH_INTEL     1
 #define ARCH_AMD       2
 
 #define END_OF_TESTS	1
 
+#define BENCHMARK_ARGS		64
+
+#define DEFAULT_SPAN		(250 * MB)
+
 #define PARENT_EXIT(err_msg)			\
 	do {					\
 		perror(err_msg);		\
@@ -52,7 +51,6 @@
  * @ctrlgrp:		Name of the control monitor group (con_mon grp)
  * @mongrp:		Name of the monitor group (mon grp)
  * @cpu_no:		CPU number to which the benchmark would be binded
- * @span:		Memory bytes accessed in each benchmark iteration
  * @filename:		Name of file to which the o/p should be written
  * @bw_report:		Bandwidth report type (reads vs writes)
  * @setup:		Call back function to setup test environment
@@ -62,7 +60,6 @@ struct resctrl_val_param {
 	char		ctrlgrp[64];
 	char		mongrp[64];
 	int		cpu_no;
-	size_t		span;
 	char		filename[64];
 	char		*bw_report;
 	unsigned long	mask;
@@ -86,10 +83,9 @@ int get_resource_id(int cpu_no, int *resource_id);
 int mount_resctrlfs(void);
 int umount_resctrlfs(void);
 int validate_bw_report_request(char *bw_report);
-bool validate_resctrl_feature_request(const char *resctrl_val);
+bool validate_resctrl_feature_request(const char *resource, const char *feature);
 char *fgrep(FILE *inf, const char *str);
 int taskset_benchmark(pid_t bm_pid, int cpu_no);
-void run_benchmark(int signum, siginfo_t *info, void *ucontext);
 int write_schemata(char *ctrlgrp, char *schemata, int cpu_no,
 		   char *resctrl_val);
 int write_bm_pid_to_resctrl(pid_t bm_pid, char *ctrlgrp, char *mongrp,
@@ -97,21 +93,21 @@ int write_bm_pid_to_resctrl(pid_t bm_pid, char *ctrlgrp, char *mongrp,
 int perf_event_open(struct perf_event_attr *hw_event, pid_t pid, int cpu,
 		    int group_fd, unsigned long flags);
 int run_fill_buf(size_t span, int memflush, int op, bool once);
-int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param);
-int mbm_bw_change(size_t span, int cpu_no, char *bw_report, char **benchmark_cmd);
+int resctrl_val(const char * const *benchmark_cmd, struct resctrl_val_param *param);
+int mbm_bw_change(int cpu_no, const char * const *benchmark_cmd);
 void tests_cleanup(void);
 void mbm_test_cleanup(void);
-int mba_schemata_change(int cpu_no, char *bw_report, char **benchmark_cmd);
+int mba_schemata_change(int cpu_no, const char * const *benchmark_cmd);
 void mba_test_cleanup(void);
 int get_cbm_mask(char *cache_type, char *cbm_mask);
 int get_cache_size(int cpu_no, char *cache_type, unsigned long *cache_size);
 void ctrlc_handler(int signum, siginfo_t *info, void *ptr);
 int signal_handler_register(void);
 void signal_handler_unregister(void);
-int cat_val(struct resctrl_val_param *param);
+int cat_val(struct resctrl_val_param *param, size_t span);
 void cat_test_cleanup(void);
 int cat_perf_miss_val(int cpu_no, int no_of_bits, char *cache_type);
-int cmt_resctrl_val(int cpu_no, int n, char **benchmark_cmd);
+int cmt_resctrl_val(int cpu_no, int n, const char * const *benchmark_cmd);
 unsigned int count_bits(unsigned long n);
 void cmt_test_cleanup(void);
 int get_core_sibling(int cpu_no);

tools/testing/selftests/resctrl/resctrl_tests.c

@@ -10,9 +10,6 @@
  */
 #include "resctrl.h"
 
-#define BENCHMARK_ARGS		64
-#define BENCHMARK_ARG_SIZE	64
-
 static int detect_vendor(void)
 {
 	FILE *inf = fopen("/proc/cpuinfo", "r");
@@ -52,8 +49,8 @@ int get_vendor(void)
 
 static void cmd_help(void)
 {
-	printf("usage: resctrl_tests [-h] [-b \"benchmark_cmd [options]\"] [-t test list] [-n no_of_bits]\n");
-	printf("\t-b benchmark_cmd [options]: run specified benchmark for MBM, MBA and CMT\n");
+	printf("usage: resctrl_tests [-h] [-t test list] [-n no_of_bits] [-b benchmark_cmd [option]...]\n");
+	printf("\t-b benchmark_cmd [option]...: run specified benchmark for MBM, MBA and CMT\n");
 	printf("\t   default benchmark is builtin fill_buf\n");
 	printf("\t-t test list: run tests specified in the test list, ");
 	printf("e.g. -t mbm,mba,cmt,cat\n");
@@ -70,72 +67,98 @@ void tests_cleanup(void)
 	cat_test_cleanup();
 }
 
-static void run_mbm_test(char **benchmark_cmd, size_t span,
-			 int cpu_no, char *bw_report)
+static int test_prepare(void)
 {
 	int res;
 
-	ksft_print_msg("Starting MBM BW change ...\n");
+	res = signal_handler_register();
+	if (res) {
+		ksft_print_msg("Failed to register signal handler\n");
+		return res;
+	}
 
 	res = mount_resctrlfs();
 	if (res) {
-		ksft_exit_fail_msg("Failed to mount resctrl FS\n");
+		signal_handler_unregister();
+		ksft_print_msg("Failed to mount resctrl FS\n");
+		return res;
+	}
+	return 0;
+}
+
+static void test_cleanup(void)
+{
+	umount_resctrlfs();
+	signal_handler_unregister();
+}
+
+static void run_mbm_test(const char * const *benchmark_cmd, int cpu_no)
+{
+	int res;
+
+	ksft_print_msg("Starting MBM BW change ...\n");
+
+	if (test_prepare()) {
+		ksft_exit_fail_msg("Abnormal failure when preparing for the test\n");
 		return;
 	}
 
-	if (!validate_resctrl_feature_request(MBM_STR) || (get_vendor() != ARCH_INTEL)) {
+	if (!validate_resctrl_feature_request("L3_MON", "mbm_total_bytes") ||
+	    !validate_resctrl_feature_request("L3_MON", "mbm_local_bytes") ||
+	    (get_vendor() != ARCH_INTEL)) {
 		ksft_test_result_skip("Hardware does not support MBM or MBM is disabled\n");
-		goto umount;
+		goto cleanup;
 	}
 
-	res = mbm_bw_change(span, cpu_no, bw_report, benchmark_cmd);
+	res = mbm_bw_change(cpu_no, benchmark_cmd);
 	ksft_test_result(!res, "MBM: bw change\n");
 	if ((get_vendor() == ARCH_INTEL) && res)
 		ksft_print_msg("Intel MBM may be inaccurate when Sub-NUMA Clustering is enabled. Check BIOS configuration.\n");
 
-umount:
-	umount_resctrlfs();
+cleanup:
+	test_cleanup();
 }
 
-static void run_mba_test(char **benchmark_cmd, int cpu_no, char *bw_report)
+static void run_mba_test(const char * const *benchmark_cmd, int cpu_no)
 {
 	int res;
 
 	ksft_print_msg("Starting MBA Schemata change ...\n");
 
-	res = mount_resctrlfs();
-	if (res) {
-		ksft_exit_fail_msg("Failed to mount resctrl FS\n");
+	if (test_prepare()) {
+		ksft_exit_fail_msg("Abnormal failure when preparing for the test\n");
 		return;
 	}
 
-	if (!validate_resctrl_feature_request(MBA_STR) || (get_vendor() != ARCH_INTEL)) {
+	if (!validate_resctrl_feature_request("MB", NULL) ||
+	    !validate_resctrl_feature_request("L3_MON", "mbm_local_bytes") ||
+	    (get_vendor() != ARCH_INTEL)) {
 		ksft_test_result_skip("Hardware does not support MBA or MBA is disabled\n");
-		goto umount;
+		goto cleanup;
 	}
 
-	res = mba_schemata_change(cpu_no, bw_report, benchmark_cmd);
+	res = mba_schemata_change(cpu_no, benchmark_cmd);
 	ksft_test_result(!res, "MBA: schemata change\n");
 
-umount:
-	umount_resctrlfs();
+cleanup:
+	test_cleanup();
 }
 
-static void run_cmt_test(char **benchmark_cmd, int cpu_no)
+static void run_cmt_test(const char * const *benchmark_cmd, int cpu_no)
 {
 	int res;
 
 	ksft_print_msg("Starting CMT test ...\n");
 
-	res = mount_resctrlfs();
-	if (res) {
-		ksft_exit_fail_msg("Failed to mount resctrl FS\n");
+	if (test_prepare()) {
+		ksft_exit_fail_msg("Abnormal failure when preparing for the test\n");
 		return;
 	}
 
-	if (!validate_resctrl_feature_request(CMT_STR)) {
+	if (!validate_resctrl_feature_request("L3_MON", "llc_occupancy") ||
+	    !validate_resctrl_feature_request("L3", NULL)) {
 		ksft_test_result_skip("Hardware does not support CMT or CMT is disabled\n");
-		goto umount;
+		goto cleanup;
 	}
 
 	res = cmt_resctrl_val(cpu_no, 5, benchmark_cmd);
@@ -143,8 +166,8 @@ static void run_cmt_test(char **benchmark_cmd, int cpu_no)
 	if ((get_vendor() == ARCH_INTEL) && res)
 		ksft_print_msg("Intel CMT may be inaccurate when Sub-NUMA Clustering is enabled. Check BIOS configuration.\n");
 
-umount:
-	umount_resctrlfs();
+cleanup:
+	test_cleanup();
 }
 
 static void run_cat_test(int cpu_no, int no_of_bits)
@@ -153,48 +176,53 @@ static void run_cat_test(int cpu_no, int no_of_bits)
 
 	ksft_print_msg("Starting CAT test ...\n");
 
-	res = mount_resctrlfs();
-	if (res) {
-		ksft_exit_fail_msg("Failed to mount resctrl FS\n");
+	if (test_prepare()) {
+		ksft_exit_fail_msg("Abnormal failure when preparing for the test\n");
 		return;
 	}
 
-	if (!validate_resctrl_feature_request(CAT_STR)) {
+	if (!validate_resctrl_feature_request("L3", NULL)) {
 		ksft_test_result_skip("Hardware does not support CAT or CAT is disabled\n");
-		goto umount;
+		goto cleanup;
 	}
 
 	res = cat_perf_miss_val(cpu_no, no_of_bits, "L3");
 	ksft_test_result(!res, "CAT: test\n");
 
-umount:
-	umount_resctrlfs();
+cleanup:
+	test_cleanup();
 }
 
 int main(int argc, char **argv)
 {
-	bool has_ben = false, mbm_test = true, mba_test = true, cmt_test = true;
-	char *benchmark_cmd[BENCHMARK_ARGS], bw_report[64], bm_type[64];
-	char benchmark_cmd_area[BENCHMARK_ARGS][BENCHMARK_ARG_SIZE];
-	int c, cpu_no = 1, argc_new = argc, i, no_of_bits = 0;
-	int ben_ind, ben_count, tests = 0;
-	size_t span = 250 * MB;
+	bool mbm_test = true, mba_test = true, cmt_test = true;
+	const char *benchmark_cmd[BENCHMARK_ARGS] = {};
+	int c, cpu_no = 1, i, no_of_bits = 0;
+	char *span_str = NULL;
 	bool cat_test = true;
+	int tests = 0;
+	int ret;
 
-	for (i = 0; i < argc; i++) {
-		if (strcmp(argv[i], "-b") == 0) {
-			ben_ind = i + 1;
-			ben_count = argc - ben_ind;
-			argc_new = ben_ind - 1;
-			has_ben = true;
-			break;
-		}
-	}
-
-	while ((c = getopt(argc_new, argv, "ht:b:n:p:")) != -1) {
+	while ((c = getopt(argc, argv, "ht:b:n:p:")) != -1) {
 		char *token;
 
 		switch (c) {
+		case 'b':
+			/*
+			 * First move optind back to the (first) optarg and
+			 * then build the benchmark command using the
+			 * remaining arguments.
+			 */
+			optind--;
+			if (argc - optind >= BENCHMARK_ARGS)
+				ksft_exit_fail_msg("Too long benchmark command");
+
+			/* Extract benchmark command from command line. */
+			for (i = 0; i < argc - optind; i++)
+				benchmark_cmd[i] = argv[i + optind];
+			benchmark_cmd[i] = NULL;
+
+			goto last_arg;
 		case 't':
 			token = strtok(optarg, ",");
 
@@ -243,6 +271,7 @@ int main(int argc, char **argv)
 			return -1;
 		}
 	}
+last_arg:
 
 	ksft_print_header();
 
@@ -254,29 +283,6 @@ int main(int argc, char **argv)
 	if (geteuid() != 0)
 		return ksft_exit_skip("Not running as root. Skipping...\n");
 
-	if (has_ben) {
-		/* Extract benchmark command from command line. */
-		for (i = ben_ind; i < argc; i++) {
-			benchmark_cmd[i - ben_ind] = benchmark_cmd_area[i];
-			sprintf(benchmark_cmd[i - ben_ind], "%s", argv[i]);
-		}
-		benchmark_cmd[ben_count] = NULL;
-	} else {
-		/* If no benchmark is given by "-b" argument, use fill_buf. */
-		for (i = 0; i < 5; i++)
-			benchmark_cmd[i] = benchmark_cmd_area[i];
-
-		strcpy(benchmark_cmd[0], "fill_buf");
-		sprintf(benchmark_cmd[1], "%zu", span);
-		strcpy(benchmark_cmd[2], "1");
-		strcpy(benchmark_cmd[3], "0");
-		strcpy(benchmark_cmd[4], "false");
-		benchmark_cmd[5] = NULL;
-	}
-
-	sprintf(bw_report, "reads");
-	sprintf(bm_type, "fill_buf");
-
 	if (!check_resctrlfs_support())
 		return ksft_exit_skip("resctrl FS does not exist. Enable X86_CPU_RESCTRL config option.\n");
 
@@ -285,13 +291,26 @@ int main(int argc, char **argv)
 
 	filter_dmesg();
 
+	if (!benchmark_cmd[0]) {
+		/* If no benchmark is given by "-b" argument, use fill_buf. */
+		benchmark_cmd[0] = "fill_buf";
+		ret = asprintf(&span_str, "%u", DEFAULT_SPAN);
+		if (ret < 0)
+			ksft_exit_fail_msg("Out of memory!\n");
+		benchmark_cmd[1] = span_str;
+		benchmark_cmd[2] = "1";
+		benchmark_cmd[3] = "0";
+		benchmark_cmd[4] = "false";
+		benchmark_cmd[5] = NULL;
+	}
+
 	ksft_set_plan(tests ? : 4);
 
 	if (mbm_test)
-		run_mbm_test(benchmark_cmd, span, cpu_no, bw_report);
+		run_mbm_test(benchmark_cmd, cpu_no);
 
 	if (mba_test)
-		run_mba_test(benchmark_cmd, cpu_no, bw_report);
+		run_mba_test(benchmark_cmd, cpu_no);
 
 	if (cmt_test)
 		run_cmt_test(benchmark_cmd, cpu_no);
@@ -299,5 +318,6 @@ int main(int argc, char **argv)
 	if (cat_test)
 		run_cat_test(cpu_no, no_of_bits);
 
+	free(span_str);
 	ksft_finished();
 }

tools/testing/selftests/resctrl/resctrl_val.c

@@ -468,6 +468,8 @@ pid_t bm_pid, ppid;
 
 void ctrlc_handler(int signum, siginfo_t *info, void *ptr)
 {
+	/* Only kill child after bm_pid is set after fork() */
+	if (bm_pid)
 		kill(bm_pid, SIGKILL);
 	umount_resctrlfs();
 	tests_cleanup();
@@ -482,9 +484,11 @@ void ctrlc_handler(int signum, siginfo_t *info, void *ptr)
  */
 int signal_handler_register(void)
 {
-	struct sigaction sigact;
+	struct sigaction sigact = {};
 	int ret = 0;
 
+	bm_pid = 0;
+
 	sigact.sa_sigaction = ctrlc_handler;
 	sigemptyset(&sigact.sa_mask);
 	sigact.sa_flags = SA_SIGINFO;
@@ -504,7 +508,7 @@ int signal_handler_register(void)
  */
 void signal_handler_unregister(void)
 {
-	struct sigaction sigact;
+	struct sigaction sigact = {};
 
 	sigact.sa_handler = SIG_DFL;
 	sigemptyset(&sigact.sa_mask);
@@ -621,6 +625,56 @@ measure_vals(struct resctrl_val_param *param, unsigned long *bw_resc_start)
 	return 0;
 }
 
+/*
+ * run_benchmark - Run a specified benchmark or fill_buf (default benchmark)
+ *		   in specified signal. Direct benchmark stdio to /dev/null.
+ * @signum:	signal number
+ * @info:	signal info
+ * @ucontext:	user context in signal handling
+ */
+static void run_benchmark(int signum, siginfo_t *info, void *ucontext)
+{
+	int operation, ret, memflush;
+	char **benchmark_cmd;
+	size_t span;
+	bool once;
+	FILE *fp;
+
+	benchmark_cmd = info->si_ptr;
+
+	/*
+	 * Direct stdio of child to /dev/null, so that only parent writes to
+	 * stdio (console)
+	 */
+	fp = freopen("/dev/null", "w", stdout);
+	if (!fp)
+		PARENT_EXIT("Unable to direct benchmark status to /dev/null");
+
+	if (strcmp(benchmark_cmd[0], "fill_buf") == 0) {
+		/* Execute default fill_buf benchmark */
+		span = strtoul(benchmark_cmd[1], NULL, 10);
+		memflush =  atoi(benchmark_cmd[2]);
+		operation = atoi(benchmark_cmd[3]);
+		if (!strcmp(benchmark_cmd[4], "true"))
+			once = true;
+		else if (!strcmp(benchmark_cmd[4], "false"))
+			once = false;
+		else
+			PARENT_EXIT("Invalid once parameter");
+
+		if (run_fill_buf(span, memflush, operation, once))
+			fprintf(stderr, "Error in running fill buffer\n");
+	} else {
+		/* Execute specified benchmark */
+		ret = execvp(benchmark_cmd[0], benchmark_cmd);
+		if (ret)
+			perror("wrong\n");
+	}
+
+	fclose(stdout);
+	PARENT_EXIT("Unable to run specified benchmark");
+}
+
 /*
  * resctrl_val:	execute benchmark and measure memory bandwidth on
  *			the benchmark
@@ -629,7 +683,7 @@ measure_vals(struct resctrl_val_param *param, unsigned long *bw_resc_start)
  *
  * Return:		0 on success. non-zero on failure.
  */
-int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param)
+int resctrl_val(const char * const *benchmark_cmd, struct resctrl_val_param *param)
 {
 	char *resctrl_val = param->resctrl_val;
 	unsigned long bw_resc_start = 0;
@@ -706,28 +760,30 @@ int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param)
 
 	ksft_print_msg("Benchmark PID: %d\n", bm_pid);
 
-	ret = signal_handler_register();
-	if (ret)
-		goto out;
-
-	value.sival_ptr = benchmark_cmd;
+	/*
+	 * The cast removes constness but nothing mutates benchmark_cmd within
+	 * the context of this process. At the receiving process, it becomes
+	 * argv, which is mutable, on exec() but that's after fork() so it
+	 * doesn't matter for the process running the tests.
+	 */
+	value.sival_ptr = (void *)benchmark_cmd;
 
 	/* Taskset benchmark to specified cpu */
 	ret = taskset_benchmark(bm_pid, param->cpu_no);
 	if (ret)
-		goto unregister;
+		goto out;
 
 	/* Write benchmark to specified control&monitoring grp in resctrl FS */
 	ret = write_bm_pid_to_resctrl(bm_pid, param->ctrlgrp, param->mongrp,
 				      resctrl_val);
 	if (ret)
-		goto unregister;
+		goto out;
 
 	if (!strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR)) ||
 	    !strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR))) {
 		ret = initialize_mem_bw_imc();
 		if (ret)
-			goto unregister;
+			goto out;
 
 		initialize_mem_bw_resctrl(param->ctrlgrp, param->mongrp,
 					  param->cpu_no, resctrl_val);
@@ -742,7 +798,7 @@ int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param)
 		    sizeof(pipe_message)) {
 			perror("# failed reading message from child process");
 			close(pipefd[0]);
-			goto unregister;
+			goto out;
 		}
 	}
 	close(pipefd[0]);
@@ -751,7 +807,7 @@ int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param)
 	if (sigqueue(bm_pid, SIGUSR1, value) == -1) {
 		perror("# sigqueue SIGUSR1 to child");
 		ret = errno;
-		goto unregister;
+		goto out;
 	}
 
 	/* Give benchmark enough time to fully run */
@@ -780,8 +836,6 @@ int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param)
 		}
 	}
 
-unregister:
-	signal_handler_unregister();
 out:
 	kill(bm_pid, SIGKILL);
 

tools/testing/selftests/resctrl/resctrlfs.c

@@ -8,6 +8,9 @@
  *    Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>,
  *    Fenghua Yu <fenghua.yu@intel.com>
  */
+#include <fcntl.h>
+#include <limits.h>
+
 #include "resctrl.h"
 
 static int find_resctrl_mount(char *buffer)
@@ -291,58 +294,6 @@ int taskset_benchmark(pid_t bm_pid, int cpu_no)
 	return 0;
 }
 
-/*
- * run_benchmark - Run a specified benchmark or fill_buf (default benchmark)
- *		   in specified signal. Direct benchmark stdio to /dev/null.
- * @signum:	signal number
- * @info:	signal info
- * @ucontext:	user context in signal handling
- *
- * Return: void
- */
-void run_benchmark(int signum, siginfo_t *info, void *ucontext)
-{
-	int operation, ret, memflush;
-	char **benchmark_cmd;
-	size_t span;
-	bool once;
-	FILE *fp;
-
-	benchmark_cmd = info->si_ptr;
-
-	/*
-	 * Direct stdio of child to /dev/null, so that only parent writes to
-	 * stdio (console)
-	 */
-	fp = freopen("/dev/null", "w", stdout);
-	if (!fp)
-		PARENT_EXIT("Unable to direct benchmark status to /dev/null");
-
-	if (strcmp(benchmark_cmd[0], "fill_buf") == 0) {
-		/* Execute default fill_buf benchmark */
-		span = strtoul(benchmark_cmd[1], NULL, 10);
-		memflush =  atoi(benchmark_cmd[2]);
-		operation = atoi(benchmark_cmd[3]);
-		if (!strcmp(benchmark_cmd[4], "true"))
-			once = true;
-		else if (!strcmp(benchmark_cmd[4], "false"))
-			once = false;
-		else
-			PARENT_EXIT("Invalid once parameter");
-
-		if (run_fill_buf(span, memflush, operation, once))
-			fprintf(stderr, "Error in running fill buffer\n");
-	} else {
-		/* Execute specified benchmark */
-		ret = execvp(benchmark_cmd[0], benchmark_cmd);
-		if (ret)
-			perror("wrong\n");
-	}
-
-	fclose(stdout);
-	PARENT_EXIT("Unable to run specified benchmark");
-}
-
 /*
  * create_grp - Create a group only if one doesn't exist
  * @grp_name:	Name of the group
@@ -488,9 +439,8 @@ int write_bm_pid_to_resctrl(pid_t bm_pid, char *ctrlgrp, char *mongrp,
  */
 int write_schemata(char *ctrlgrp, char *schemata, int cpu_no, char *resctrl_val)
 {
-	char controlgroup[1024], schema[1024], reason[64];
-	int resource_id, ret = 0;
-	FILE *fp;
+	char controlgroup[1024], reason[128], schema[1024] = {};
+	int resource_id, fd, schema_len = -1, ret = 0;
 
 	if (strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR)) &&
 	    strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR)) &&
@@ -518,28 +468,39 @@ int write_schemata(char *ctrlgrp, char *schemata, int cpu_no, char *resctrl_val)
 
 	if (!strncmp(resctrl_val, CAT_STR, sizeof(CAT_STR)) ||
 	    !strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR)))
-		sprintf(schema, "%s%d%c%s", "L3:", resource_id, '=', schemata);
+		schema_len = snprintf(schema, sizeof(schema), "%s%d%c%s\n",
+				      "L3:", resource_id, '=', schemata);
 	if (!strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR)) ||
 	    !strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR)))
-		sprintf(schema, "%s%d%c%s", "MB:", resource_id, '=', schemata);
-
-	fp = fopen(controlgroup, "w");
-	if (!fp) {
-		sprintf(reason, "Failed to open control group");
+		schema_len = snprintf(schema, sizeof(schema), "%s%d%c%s\n",
+				      "MB:", resource_id, '=', schemata);
+	if (schema_len < 0 || schema_len >= sizeof(schema)) {
+		snprintf(reason, sizeof(reason),
+			 "snprintf() failed with return value : %d", schema_len);
 		ret = -1;
-
 		goto out;
 	}
 
-	if (fprintf(fp, "%s\n", schema) < 0) {
-		sprintf(reason, "Failed to write schemata in control group");
-		fclose(fp);
+	fd = open(controlgroup, O_WRONLY);
+	if (fd < 0) {
+		snprintf(reason, sizeof(reason),
+			 "open() failed : %s", strerror(errno));
 		ret = -1;
 
-		goto out;
+		goto err_schema_not_empty;
 	}
-	fclose(fp);
+	if (write(fd, schema, schema_len) < 0) {
+		snprintf(reason, sizeof(reason),
+			 "write() failed : %s", strerror(errno));
+		close(fd);
+		ret = -1;
 
+		goto err_schema_not_empty;
+	}
+	close(fd);
+
+err_schema_not_empty:
+	schema[schema_len - 1] = 0;
 out:
 	ksft_print_msg("Write schema \"%s\" to resctrl FS%s%s\n",
 		       schema, ret ? " # " : "",
@@ -604,63 +565,46 @@ char *fgrep(FILE *inf, const char *str)
 
 /*
  * validate_resctrl_feature_request - Check if requested feature is valid.
- * @resctrl_val:	Requested feature
+ * @resource:	Required resource (e.g., MB, L3, L2, L3_MON, etc.)
+ * @feature:	Required monitor feature (in mon_features file). Can only be
+ *		set for L3_MON. Must be NULL for all other resources.
  *
- * Return: True if the feature is supported, else false. False is also
- *         returned if resctrl FS is not mounted.
+ * Return: True if the resource/feature is supported, else false. False is
+ *         also returned if resctrl FS is not mounted.
  */
-bool validate_resctrl_feature_request(const char *resctrl_val)
+bool validate_resctrl_feature_request(const char *resource, const char *feature)
 {
+	char res_path[PATH_MAX];
 	struct stat statbuf;
-	bool found = false;
 	char *res;
 	FILE *inf;
 	int ret;
 
-	if (!resctrl_val)
+	if (!resource)
 		return false;
 
 	ret = find_resctrl_mount(NULL);
 	if (ret)
 		return false;
 
-	if (!strncmp(resctrl_val, CAT_STR, sizeof(CAT_STR))) {
-		if (!stat(L3_PATH, &statbuf))
-			return true;
-	} else if (!strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR))) {
-		if (!stat(MB_PATH, &statbuf))
+	snprintf(res_path, sizeof(res_path), "%s/%s", INFO_PATH, resource);
+
+	if (stat(res_path, &statbuf))
+		return false;
+
+	if (!feature)
 		return true;
-	} else if (!strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR)) ||
-		   !strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR))) {
-		if (!stat(L3_MON_PATH, &statbuf)) {
-			inf = fopen(L3_MON_FEATURES_PATH, "r");
+
+	snprintf(res_path, sizeof(res_path), "%s/%s/mon_features", INFO_PATH, resource);
+	inf = fopen(res_path, "r");
 	if (!inf)
 		return false;
 
-			if (!strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR))) {
-				res = fgrep(inf, "llc_occupancy");
-				if (res) {
-					found = true;
+	res = fgrep(inf, feature);
 	free(res);
-				}
-			}
-
-			if (!strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR))) {
-				res = fgrep(inf, "mbm_total_bytes");
-				if (res) {
-					free(res);
-					res = fgrep(inf, "mbm_local_bytes");
-					if (res) {
-						found = true;
-						free(res);
-					}
-				}
-			}
 	fclose(inf);
-		}
-	}
 
-	return found;
+	return !!res;
 }
 
 int filter_dmesg(void)

tools/testing/selftests/rseq/param_test.c

@@ -1231,7 +1231,7 @@ void *test_membarrier_worker_thread(void *arg)
 	}
 
 	/* Wait for initialization. */
-	while (!atomic_load(&args->percpu_list_ptr)) {}
+	while (!__atomic_load_n(&args->percpu_list_ptr, __ATOMIC_ACQUIRE)) {}
 
 	for (i = 0; i < iters; ++i) {
 		int ret;
@@ -1299,22 +1299,22 @@ void *test_membarrier_manager_thread(void *arg)
 	test_membarrier_init_percpu_list(&list_a);
 	test_membarrier_init_percpu_list(&list_b);
 
-	atomic_store(&args->percpu_list_ptr, (intptr_t)&list_a);
+	__atomic_store_n(&args->percpu_list_ptr, (intptr_t)&list_a, __ATOMIC_RELEASE);
 
-	while (!atomic_load(&args->stop)) {
+	while (!__atomic_load_n(&args->stop, __ATOMIC_ACQUIRE)) {
 		/* list_a is "active". */
 		cpu_a = rand() % CPU_SETSIZE;
 		/*
 		 * As list_b is "inactive", we should never see changes
 		 * to list_b.
 		 */
-		if (expect_b != atomic_load(&list_b.c[cpu_b].head->data)) {
+		if (expect_b != __atomic_load_n(&list_b.c[cpu_b].head->data, __ATOMIC_ACQUIRE)) {
 			fprintf(stderr, "Membarrier test failed\n");
 			abort();
 		}
 
 		/* Make list_b "active". */
-		atomic_store(&args->percpu_list_ptr, (intptr_t)&list_b);
+		__atomic_store_n(&args->percpu_list_ptr, (intptr_t)&list_b, __ATOMIC_RELEASE);
 		if (rseq_membarrier_expedited(cpu_a) &&
 				errno != ENXIO /* missing CPU */) {
 			perror("sys_membarrier");
@@ -1324,27 +1324,27 @@ void *test_membarrier_manager_thread(void *arg)
 		 * Cpu A should now only modify list_b, so the values
 		 * in list_a should be stable.
 		 */
-		expect_a = atomic_load(&list_a.c[cpu_a].head->data);
+		expect_a = __atomic_load_n(&list_a.c[cpu_a].head->data, __ATOMIC_ACQUIRE);
 
 		cpu_b = rand() % CPU_SETSIZE;
 		/*
 		 * As list_a is "inactive", we should never see changes
 		 * to list_a.
 		 */
-		if (expect_a != atomic_load(&list_a.c[cpu_a].head->data)) {
+		if (expect_a != __atomic_load_n(&list_a.c[cpu_a].head->data, __ATOMIC_ACQUIRE)) {
 			fprintf(stderr, "Membarrier test failed\n");
 			abort();
 		}
 
 		/* Make list_a "active". */
-		atomic_store(&args->percpu_list_ptr, (intptr_t)&list_a);
+		__atomic_store_n(&args->percpu_list_ptr, (intptr_t)&list_a, __ATOMIC_RELEASE);
 		if (rseq_membarrier_expedited(cpu_b) &&
 				errno != ENXIO /* missing CPU*/) {
 			perror("sys_membarrier");
 			abort();
 		}
 		/* Remember a value from list_b. */
-		expect_b = atomic_load(&list_b.c[cpu_b].head->data);
+		expect_b = __atomic_load_n(&list_b.c[cpu_b].head->data, __ATOMIC_ACQUIRE);
 	}
 
 	test_membarrier_free_percpu_list(&list_a);
@@ -1401,7 +1401,7 @@ void test_membarrier(void)
 		}
 	}
 
-	atomic_store(&thread_args.stop, 1);
+	__atomic_store_n(&thread_args.stop, 1, __ATOMIC_RELEASE);
 	ret = pthread_join(manager_thread, NULL);
 	if (ret) {
 		errno = ret;

tools/testing/selftests/sigaltstack/sas.c

@@ -111,7 +111,7 @@ int main(void)
 
 	/* Make sure more than the required minimum. */
 	stack_size = getauxval(AT_MINSIGSTKSZ) + SIGSTKSZ;
-	ksft_print_msg("[NOTE]\tthe stack size is %lu\n", stack_size);
+	ksft_print_msg("[NOTE]\tthe stack size is %u\n", stack_size);
 
 	ksft_print_header();
 	ksft_set_plan(3);

tools/testing/selftests/static_keys/test_static_keys.sh

@@ -6,18 +6,18 @@
 ksft_skip=4
 
 if ! /sbin/modprobe -q -n test_static_key_base; then
-	echo "static_key: module test_static_key_base is not found [SKIP]"
+	echo "static_keys: module test_static_key_base is not found [SKIP]"
 	exit $ksft_skip
 fi
 
 if ! /sbin/modprobe -q -n test_static_keys; then
-	echo "static_key: module test_static_keys is not found [SKIP]"
+	echo "static_keys: module test_static_keys is not found [SKIP]"
 	exit $ksft_skip
 fi
 
 if /sbin/modprobe -q test_static_key_base; then
 	if /sbin/modprobe -q test_static_keys; then
-		echo "static_key: ok"
+		echo "static_keys: ok"
 		/sbin/modprobe -q -r test_static_keys
 		/sbin/modprobe -q -r test_static_key_base
 	else
@@ -25,6 +25,6 @@ if /sbin/modprobe -q test_static_key_base; then
 		/sbin/modprobe -q -r test_static_key_base
 	fi
 else
-	echo "static_key: [FAIL]"
+	echo "static_keys: [FAIL]"
 	exit 1
 fi

tools/testing/selftests/tdx/.gitignore

+tdx_guest_test

tools/testing/selftests/timers/nsleep-lat.c

@@ -118,7 +118,7 @@ int nanosleep_lat_test(int clockid, long long ns)
 	clock_gettime(clockid, &end);
 
 	if (((timespec_sub(start, end)/count)-ns) > UNRESONABLE_LATENCY) {
-		printf("Large rel latency: %lld ns :", (timespec_sub(start, end)/count)-ns);
+		ksft_print_msg("Large rel latency: %lld ns :", (timespec_sub(start, end)/count)-ns);
 		return -1;
 	}
 
@@ -132,20 +132,23 @@ int nanosleep_lat_test(int clockid, long long ns)
 	}
 
 	if (latency/count > UNRESONABLE_LATENCY) {
-		printf("Large abs latency: %lld ns :", latency/count);
+		ksft_print_msg("Large abs latency: %lld ns :", latency/count);
 		return -1;
 	}
 
 	return 0;
 }
 
-
+#define SKIPPED_CLOCK_COUNT 3
 
 int main(int argc, char **argv)
 {
 	long long length;
 	int clockid, ret;
 
+	ksft_print_header();
+	ksft_set_plan(NR_CLOCKIDS - CLOCK_REALTIME - SKIPPED_CLOCK_COUNT);
+
 	for (clockid = CLOCK_REALTIME; clockid < NR_CLOCKIDS; clockid++) {
 
 		/* Skip cputime clockids since nanosleep won't increment cputime */
@@ -154,9 +157,6 @@ int main(int argc, char **argv)
 				clockid == CLOCK_HWSPECIFIC)
 			continue;
 
-		printf("nsleep latency %-26s ", clockstring(clockid));
-		fflush(stdout);
-
 		length = 10;
 		while (length <= (NSEC_PER_SEC * 10)) {
 			ret = nanosleep_lat_test(clockid, length);
@@ -167,14 +167,12 @@ int main(int argc, char **argv)
 		}
 
 		if (ret == UNSUPPORTED) {
-			printf("[UNSUPPORTED]\n");
-			continue;
-		}
-		if (ret < 0) {
-			printf("[FAILED]\n");
-			return ksft_exit_fail();
+			ksft_test_result_skip("%s\n", clockstring(clockid));
+		} else {
+			ksft_test_result(ret >= 0, "%s\n",
+					 clockstring(clockid));
 		}
-		printf("[OK]\n");
 	}
-	return ksft_exit_pass();
+
+	ksft_finished();
 }

tools/testing/selftests/timers/posix_timers.c

@@ -76,22 +76,21 @@ static int check_diff(struct timeval start, struct timeval end)
 
 static int check_itimer(int which)
 {
+	const char *name;
 	int err;
 	struct timeval start, end;
 	struct itimerval val = {
 		.it_value.tv_sec = DELAY,
 	};
 
-	printf("Check itimer ");
-
 	if (which == ITIMER_VIRTUAL)
-		printf("virtual... ");
+		name = "ITIMER_VIRTUAL";
 	else if (which == ITIMER_PROF)
-		printf("prof... ");
+		name = "ITIMER_PROF";
 	else if (which == ITIMER_REAL)
-		printf("real... ");
-
-	fflush(stdout);
+		name = "ITIMER_REAL";
+	else
+		return -1;
 
 	done = 0;
 
@@ -104,13 +103,13 @@ static int check_itimer(int which)
 
 	err = gettimeofday(&start, NULL);
 	if (err < 0) {
-		perror("Can't call gettimeofday()\n");
+		ksft_perror("Can't call gettimeofday()");
 		return -1;
 	}
 
 	err = setitimer(which, &val, NULL);
 	if (err < 0) {
-		perror("Can't set timer\n");
+		ksft_perror("Can't set timer");
 		return -1;
 	}
 
@@ -123,20 +122,18 @@ static int check_itimer(int which)
 
 	err = gettimeofday(&end, NULL);
 	if (err < 0) {
-		perror("Can't call gettimeofday()\n");
+		ksft_perror("Can't call gettimeofday()");
 		return -1;
 	}
 
-	if (!check_diff(start, end))
-		printf("[OK]\n");
-	else
-		printf("[FAIL]\n");
+	ksft_test_result(check_diff(start, end) == 0, "%s\n", name);
 
 	return 0;
 }
 
 static int check_timer_create(int which)
 {
+	const char *type;
 	int err;
 	timer_t id;
 	struct timeval start, end;
@@ -144,31 +141,32 @@ static int check_timer_create(int which)
 		.it_value.tv_sec = DELAY,
 	};
 
-	printf("Check timer_create() ");
 	if (which == CLOCK_THREAD_CPUTIME_ID) {
-		printf("per thread... ");
+		type = "thread";
 	} else if (which == CLOCK_PROCESS_CPUTIME_ID) {
-		printf("per process... ");
+		type = "process";
+	} else {
+		ksft_print_msg("Unknown timer_create() type %d\n", which);
+		return -1;
 	}
-	fflush(stdout);
 
 	done = 0;
 	err = timer_create(which, NULL, &id);
 	if (err < 0) {
-		perror("Can't create timer\n");
+		ksft_perror("Can't create timer");
 		return -1;
 	}
 	signal(SIGALRM, sig_handler);
 
 	err = gettimeofday(&start, NULL);
 	if (err < 0) {
-		perror("Can't call gettimeofday()\n");
+		ksft_perror("Can't call gettimeofday()");
 		return -1;
 	}
 
 	err = timer_settime(id, 0, &val, NULL);
 	if (err < 0) {
-		perror("Can't set timer\n");
+		ksft_perror("Can't set timer");
 		return -1;
 	}
 
@@ -176,14 +174,12 @@ static int check_timer_create(int which)
 
 	err = gettimeofday(&end, NULL);
 	if (err < 0) {
-		perror("Can't call gettimeofday()\n");
+		ksft_perror("Can't call gettimeofday()");
 		return -1;
 	}
 
-	if (!check_diff(start, end))
-		printf("[OK]\n");
-	else
-		printf("[FAIL]\n");
+	ksft_test_result(check_diff(start, end) == 0,
+			 "timer_create() per %s\n", type);
 
 	return 0;
 }
@@ -220,25 +216,25 @@ static int check_timer_distribution(void)
 		.it_interval.tv_nsec = 1000 * 1000,
 	};
 
-	printf("Check timer_create() per process signal distribution... ");
-	fflush(stdout);
-
 	remain = nthreads + 1;  /* worker threads + this thread */
 	signal(SIGALRM, distribution_handler);
 	err = timer_create(CLOCK_PROCESS_CPUTIME_ID, NULL, &id);
 	if (err < 0) {
-		perror("Can't create timer\n");
+		ksft_perror("Can't create timer");
 		return -1;
 	}
 	err = timer_settime(id, 0, &val, NULL);
 	if (err < 0) {
-		perror("Can't set timer\n");
+		ksft_perror("Can't set timer");
 		return -1;
 	}
 
 	for (i = 0; i < nthreads; i++) {
-		if (pthread_create(&threads[i], NULL, distribution_thread, NULL)) {
-			perror("Can't create thread\n");
+		err = pthread_create(&threads[i], NULL, distribution_thread,
+				     NULL);
+		if (err) {
+			ksft_print_msg("Can't create thread: %s (%d)\n",
+				       strerror(errno), errno);
 			return -1;
 		}
 	}
@@ -247,25 +243,30 @@ static int check_timer_distribution(void)
 	while (__atomic_load_n(&remain, __ATOMIC_RELAXED));
 
 	for (i = 0; i < nthreads; i++) {
-		if (pthread_join(threads[i], NULL)) {
-			perror("Can't join thread\n");
+		err = pthread_join(threads[i], NULL);
+		if (err) {
+			ksft_print_msg("Can't join thread: %s (%d)\n",
+				       strerror(errno), errno);
 			return -1;
 		}
 	}
 
 	if (timer_delete(id)) {
-		perror("Can't delete timer\n");
+		ksft_perror("Can't delete timer");
 		return -1;
 	}
 
-	printf("[OK]\n");
+	ksft_test_result_pass("check_timer_distribution\n");
 	return 0;
 }
 
 int main(int argc, char **argv)
 {
-	printf("Testing posix timers. False negative may happen on CPU execution \n");
-	printf("based timers if other threads run on the CPU...\n");
+	ksft_print_header();
+	ksft_set_plan(6);
+
+	ksft_print_msg("Testing posix timers. False negative may happen on CPU execution \n");
+	ksft_print_msg("based timers if other threads run on the CPU...\n");
 
 	if (check_itimer(ITIMER_VIRTUAL) < 0)
 		return ksft_exit_fail();
@@ -294,5 +295,5 @@ int main(int argc, char **argv)
 	if (check_timer_distribution() < 0)
 		return ksft_exit_fail();
 
-	return ksft_exit_pass();
+	ksft_finished();
 }

tools/testing/selftests/uevent/uevent_filtering.c

@@ -78,7 +78,7 @@ static int uevent_listener(unsigned long post_flags, bool expect_uevent,
 {
 	int sk_fd, ret;
 	socklen_t sk_addr_len;
-	int fret = -1, rcv_buf_sz = __UEVENT_BUFFER_SIZE;
+	int rcv_buf_sz = __UEVENT_BUFFER_SIZE;
 	uint64_t sync_add = 1;
 	struct sockaddr_nl sk_addr = { 0 }, rcv_addr = { 0 };
 	char buf[__UEVENT_BUFFER_SIZE] = { 0 };
@@ -121,6 +121,7 @@ static int uevent_listener(unsigned long post_flags, bool expect_uevent,
 
 	if ((size_t)sk_addr_len != sizeof(sk_addr)) {
 		fprintf(stderr, "Invalid socket address size\n");
+		ret = -1;
 		goto on_error;
 	}
 
@@ -147,11 +148,12 @@ static int uevent_listener(unsigned long post_flags, bool expect_uevent,
 	ret = write_nointr(sync_fd, &sync_add, sizeof(sync_add));
 	close(sync_fd);
 	if (ret != sizeof(sync_add)) {
+		ret = -1;
 		fprintf(stderr, "Failed to synchronize with parent process\n");
 		goto on_error;
 	}
 
-	fret = 0;
+	ret = 0;
 	for (;;) {
 		ssize_t r;
 
@@ -187,7 +189,7 @@ static int uevent_listener(unsigned long post_flags, bool expect_uevent,
 on_error:
 	close(sk_fd);
 
-	return fret;
+	return ret;
 }
 
 int trigger_uevent(unsigned int times)

tools/testing/selftests/user_events/.gitignore

+abi_test
+dyn_test
+ftrace_test
+perf_test