diff options
Diffstat (limited to 'lib/cpumask_kunit.c')
| -rw-r--r-- | lib/cpumask_kunit.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/lib/cpumask_kunit.c b/lib/cpumask_kunit.c new file mode 100644 index 000000000000..4d353614d853 --- /dev/null +++ b/lib/cpumask_kunit.c @@ -0,0 +1,137 @@ +// 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 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((test), mask_weight, iter); \ + } while (0) + +#define EXPECT_FOR_EACH_CPU_NOT_EQ(test, mask) \ + do { \ + const cpumask_t *m = (mask); \ + int mask_weight = cpumask_weight(m); \ + int cpu, iter = 0; \ + for_each_cpu_not(cpu, m) \ + iter++; \ + KUNIT_EXPECT_EQ((test), nr_cpu_ids - mask_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((test), mask_weight, iter); \ + } 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((test), mask_weight, iter); \ + } while (0) + +static cpumask_t mask_empty; +static cpumask_t mask_all; + +static void test_cpumask_weight(struct kunit *test) +{ + KUNIT_EXPECT_TRUE(test, cpumask_empty(&mask_empty)); + KUNIT_EXPECT_TRUE(test, cpumask_full(&mask_all)); + + KUNIT_EXPECT_EQ(test, 0, cpumask_weight(&mask_empty)); + KUNIT_EXPECT_EQ(test, nr_cpu_ids, cpumask_weight(cpu_possible_mask)); + KUNIT_EXPECT_EQ(test, nr_cpumask_bits, cpumask_weight(&mask_all)); +} + +static void test_cpumask_first(struct kunit *test) +{ + KUNIT_EXPECT_LE(test, nr_cpu_ids, cpumask_first(&mask_empty)); + KUNIT_EXPECT_EQ(test, 0, cpumask_first(cpu_possible_mask)); + + KUNIT_EXPECT_EQ(test, 0, cpumask_first_zero(&mask_empty)); + KUNIT_EXPECT_LE(test, nr_cpu_ids, cpumask_first_zero(cpu_possible_mask)); +} + +static void test_cpumask_last(struct kunit *test) +{ + KUNIT_EXPECT_LE(test, nr_cpumask_bits, cpumask_last(&mask_empty)); + KUNIT_EXPECT_EQ(test, nr_cpu_ids - 1, cpumask_last(cpu_possible_mask)); +} + +static void test_cpumask_next(struct kunit *test) +{ + KUNIT_EXPECT_EQ(test, 0, cpumask_next_zero(-1, &mask_empty)); + KUNIT_EXPECT_LE(test, nr_cpu_ids, cpumask_next_zero(-1, cpu_possible_mask)); + + KUNIT_EXPECT_LE(test, nr_cpu_ids, cpumask_next(-1, &mask_empty)); + KUNIT_EXPECT_EQ(test, 0, cpumask_next(-1, cpu_possible_mask)); +} + +static void test_cpumask_iterators(struct kunit *test) +{ + EXPECT_FOR_EACH_CPU_EQ(test, &mask_empty); + EXPECT_FOR_EACH_CPU_NOT_EQ(test, &mask_empty); + EXPECT_FOR_EACH_CPU_WRAP_EQ(test, &mask_empty); + + EXPECT_FOR_EACH_CPU_EQ(test, cpu_possible_mask); + EXPECT_FOR_EACH_CPU_NOT_EQ(test, cpu_possible_mask); + EXPECT_FOR_EACH_CPU_WRAP_EQ(test, cpu_possible_mask); +} + +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_LICENSE("GPL"); |