// SPDX-License-Identifier: GPL-2.0-only/* * KUnit tests for cpumask. * * Author: Sander Vanheule <sander@svanheule.net> */ #include <kunit/test.h>#include <linux/cpu.h>#include <linux/cpumask.h> #define MASK_MSG(m) \	"%s contains %sCPUs %*pbl", #m, (cpumask_weight(m) ? "" : "no "), \	nr_cpumask_bits, cpumask_bits(m) #define EXPECT_FOR_EACH_CPU_EQ(test, mask)			\	do {							\		const cpumask_t *m = (mask);			\		int mask_weight = cpumask_weight(m);		\		int cpu, iter = 0;				\		for_each_cpu(cpu, m)				\			iter++;					\		KUNIT_EXPECT_EQ_MSG((test), mask_weight, iter, MASK_MSG(mask));	\	} while (0) #define EXPECT_FOR_EACH_CPU_OP_EQ(test, op, mask1, mask2)			\	do {									\		const cpumask_t *m1 = (mask1);					\		const cpumask_t *m2 = (mask2);					\		int weight;                                                     \		int cpu, iter = 0;						\		cpumask_##op(&mask_tmp, m1, m2);                                \		weight = cpumask_weight(&mask_tmp);				\		for_each_cpu_##op(cpu, mask1, mask2)				\			iter++;							\		KUNIT_EXPECT_EQ((test), weight, iter);				\	} while (0) #define EXPECT_FOR_EACH_CPU_WRAP_EQ(test, mask)			\	do {							\		const cpumask_t *m = (mask);			\		int mask_weight = cpumask_weight(m);		\		int cpu, iter = 0;				\		for_each_cpu_wrap(cpu, m, nr_cpu_ids / 2)	\			iter++;					\		KUNIT_EXPECT_EQ_MSG((test), mask_weight, iter, MASK_MSG(mask));	\	} while (0) #define EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, name)		\	do {							\		int mask_weight = num_##name##_cpus();		\		int cpu, iter = 0;				\		for_each_##name##_cpu(cpu)			\			iter++;					\		KUNIT_EXPECT_EQ_MSG((test), mask_weight, iter, MASK_MSG(cpu_##name##_mask));	\	} while (0) static cpumask_t mask_empty;static cpumask_t mask_all;static cpumask_t mask_tmp; static void test_cpumask_weight(struct kunit *test){	KUNIT_EXPECT_TRUE_MSG(test, cpumask_empty(&mask_empty), MASK_MSG(&mask_empty));	KUNIT_EXPECT_TRUE_MSG(test, cpumask_full(&mask_all), MASK_MSG(&mask_all)); 	KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_weight(&mask_empty), MASK_MSG(&mask_empty));	KUNIT_EXPECT_EQ_MSG(test, nr_cpu_ids, cpumask_weight(cpu_possible_mask),			    MASK_MSG(cpu_possible_mask));	KUNIT_EXPECT_EQ_MSG(test, nr_cpu_ids, cpumask_weight(&mask_all), MASK_MSG(&mask_all));} static void test_cpumask_first(struct kunit *test){	KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_first(&mask_empty), MASK_MSG(&mask_empty));	KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_first(cpu_possible_mask), MASK_MSG(cpu_possible_mask)); 	KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_first_zero(&mask_empty), MASK_MSG(&mask_empty));	KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_first_zero(cpu_possible_mask),			    MASK_MSG(cpu_possible_mask));} static void test_cpumask_last(struct kunit *test){	KUNIT_EXPECT_LE_MSG(test, nr_cpumask_bits, cpumask_last(&mask_empty),			    MASK_MSG(&mask_empty));	KUNIT_EXPECT_EQ_MSG(test, nr_cpu_ids - 1, cpumask_last(cpu_possible_mask),			    MASK_MSG(cpu_possible_mask));} static void test_cpumask_next(struct kunit *test){	KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_next_zero(-1, &mask_empty), MASK_MSG(&mask_empty));	KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_next_zero(-1, cpu_possible_mask),			    MASK_MSG(cpu_possible_mask)); 	KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_next(-1, &mask_empty),			    MASK_MSG(&mask_empty));	KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_next(-1, cpu_possible_mask),			    MASK_MSG(cpu_possible_mask));} static void test_cpumask_iterators(struct kunit *test){	EXPECT_FOR_EACH_CPU_EQ(test, &mask_empty);	EXPECT_FOR_EACH_CPU_WRAP_EQ(test, &mask_empty);	EXPECT_FOR_EACH_CPU_OP_EQ(test, and, &mask_empty, &mask_empty);	EXPECT_FOR_EACH_CPU_OP_EQ(test, and, cpu_possible_mask, &mask_empty);	EXPECT_FOR_EACH_CPU_OP_EQ(test, andnot, &mask_empty, &mask_empty); 	EXPECT_FOR_EACH_CPU_EQ(test, cpu_possible_mask);	EXPECT_FOR_EACH_CPU_WRAP_EQ(test, cpu_possible_mask);	EXPECT_FOR_EACH_CPU_OP_EQ(test, and, cpu_possible_mask, cpu_possible_mask);	EXPECT_FOR_EACH_CPU_OP_EQ(test, andnot, cpu_possible_mask, &mask_empty);} static void test_cpumask_iterators_builtin(struct kunit *test){	EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, possible); 	/* Ensure the dynamic masks are stable while running the tests */	cpu_hotplug_disable(); 	EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, online);	EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, present); 	cpu_hotplug_enable();} static int test_cpumask_init(struct kunit *test){	cpumask_clear(&mask_empty);	cpumask_setall(&mask_all); 	return 0;} static struct kunit_case test_cpumask_cases[] = {	KUNIT_CASE(test_cpumask_weight),	KUNIT_CASE(test_cpumask_first),	KUNIT_CASE(test_cpumask_last),	KUNIT_CASE(test_cpumask_next),	KUNIT_CASE(test_cpumask_iterators),	KUNIT_CASE(test_cpumask_iterators_builtin),	{}}; static struct kunit_suite test_cpumask_suite = {	.name = "cpumask",	.init = test_cpumask_init,	.test_cases = test_cpumask_cases,};kunit_test_suite(test_cpumask_suite); MODULE_DESCRIPTION("KUnit tests for cpumask");MODULE_LICENSE("GPL");