| 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* |
| 3 | * KUnit tests for cpumask. |
| 4 | * |
| 5 | * Author: Sander Vanheule <sander@svanheule.net> |
| 6 | */ |
| 7 | |
| 8 | #include <kunit/test.h> |
| 9 | #include <linux/cpu.h> |
| 10 | #include <linux/cpumask.h> |
| 11 | |
| 12 | #define MASK_MSG(m) \ |
| 13 | "%s contains %sCPUs %*pbl", #m, (cpumask_weight(m) ? "" : "no "), \ |
| 14 | nr_cpumask_bits, cpumask_bits(m) |
| 15 | |
| 16 | #define EXPECT_FOR_EACH_CPU_EQ(test, mask) \ |
| 17 | do { \ |
| 18 | const cpumask_t *m = (mask); \ |
| 19 | int mask_weight = cpumask_weight(m); \ |
| 20 | int cpu, iter = 0; \ |
| 21 | for_each_cpu(cpu, m) \ |
| 22 | iter++; \ |
| 23 | KUNIT_EXPECT_EQ_MSG((test), mask_weight, iter, MASK_MSG(mask)); \ |
| 24 | } while (0) |
| 25 | |
| 26 | #define EXPECT_FOR_EACH_CPU_NOT_EQ(test, mask) \ |
| 27 | do { \ |
| 28 | const cpumask_t *m = (mask); \ |
| 29 | int mask_weight = cpumask_weight(m); \ |
| 30 | int cpu, iter = 0; \ |
| 31 | for_each_cpu_not(cpu, m) \ |
| 32 | iter++; \ |
| 33 | KUNIT_EXPECT_EQ_MSG((test), nr_cpu_ids - mask_weight, iter, MASK_MSG(mask)); \ |
| 34 | } while (0) |
| 35 | |
| 36 | #define EXPECT_FOR_EACH_CPU_WRAP_EQ(test, mask) \ |
| 37 | do { \ |
| 38 | const cpumask_t *m = (mask); \ |
| 39 | int mask_weight = cpumask_weight(m); \ |
| 40 | int cpu, iter = 0; \ |
| 41 | for_each_cpu_wrap(cpu, m, nr_cpu_ids / 2) \ |
| 42 | iter++; \ |
| 43 | KUNIT_EXPECT_EQ_MSG((test), mask_weight, iter, MASK_MSG(mask)); \ |
| 44 | } while (0) |
| 45 | |
| 46 | #define EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, name) \ |
| 47 | do { \ |
| 48 | int mask_weight = num_##name##_cpus(); \ |
| 49 | int cpu, iter = 0; \ |
| 50 | for_each_##name##_cpu(cpu) \ |
| 51 | iter++; \ |
| 52 | KUNIT_EXPECT_EQ_MSG((test), mask_weight, iter, MASK_MSG(cpu_##name##_mask)); \ |
| 53 | } while (0) |
| 54 | |
| 55 | static cpumask_t mask_empty; |
| 56 | static cpumask_t mask_all; |
| 57 | |
| 58 | static void test_cpumask_weight(struct kunit *test) |
| 59 | { |
| 60 | KUNIT_EXPECT_TRUE_MSG(test, cpumask_empty(&mask_empty), MASK_MSG(&mask_empty)); |
| 61 | KUNIT_EXPECT_TRUE_MSG(test, cpumask_full(&mask_all), MASK_MSG(&mask_all)); |
| 62 | |
| 63 | KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_weight(&mask_empty), MASK_MSG(&mask_empty)); |
| 64 | KUNIT_EXPECT_EQ_MSG(test, nr_cpu_ids, cpumask_weight(cpu_possible_mask), |
| 65 | MASK_MSG(cpu_possible_mask)); |
| 66 | KUNIT_EXPECT_EQ_MSG(test, nr_cpumask_bits, cpumask_weight(&mask_all), MASK_MSG(&mask_all)); |
| 67 | } |
| 68 | |
| 69 | static void test_cpumask_first(struct kunit *test) |
| 70 | { |
| 71 | KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_first(&mask_empty), MASK_MSG(&mask_empty)); |
| 72 | KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_first(cpu_possible_mask), MASK_MSG(cpu_possible_mask)); |
| 73 | |
| 74 | KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_first_zero(&mask_empty), MASK_MSG(&mask_empty)); |
| 75 | KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_first_zero(cpu_possible_mask), |
| 76 | MASK_MSG(cpu_possible_mask)); |
| 77 | } |
| 78 | |
| 79 | static void test_cpumask_last(struct kunit *test) |
| 80 | { |
| 81 | KUNIT_EXPECT_LE_MSG(test, nr_cpumask_bits, cpumask_last(&mask_empty), |
| 82 | MASK_MSG(&mask_empty)); |
| 83 | KUNIT_EXPECT_EQ_MSG(test, nr_cpu_ids - 1, cpumask_last(cpu_possible_mask), |
| 84 | MASK_MSG(cpu_possible_mask)); |
| 85 | } |
| 86 | |
| 87 | static void test_cpumask_next(struct kunit *test) |
| 88 | { |
| 89 | KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_next_zero(-1, &mask_empty), MASK_MSG(&mask_empty)); |
| 90 | KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_next_zero(-1, cpu_possible_mask), |
| 91 | MASK_MSG(cpu_possible_mask)); |
| 92 | |
| 93 | KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_next(-1, &mask_empty), |
| 94 | MASK_MSG(&mask_empty)); |
| 95 | KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_next(-1, cpu_possible_mask), |
| 96 | MASK_MSG(cpu_possible_mask)); |
| 97 | } |
| 98 | |
| 99 | static void test_cpumask_iterators(struct kunit *test) |
| 100 | { |
| 101 | EXPECT_FOR_EACH_CPU_EQ(test, &mask_empty); |
| 102 | EXPECT_FOR_EACH_CPU_NOT_EQ(test, &mask_empty); |
| 103 | EXPECT_FOR_EACH_CPU_WRAP_EQ(test, &mask_empty); |
| 104 | |
| 105 | EXPECT_FOR_EACH_CPU_EQ(test, cpu_possible_mask); |
| 106 | EXPECT_FOR_EACH_CPU_NOT_EQ(test, cpu_possible_mask); |
| 107 | EXPECT_FOR_EACH_CPU_WRAP_EQ(test, cpu_possible_mask); |
| 108 | } |
| 109 | |
| 110 | static void test_cpumask_iterators_builtin(struct kunit *test) |
| 111 | { |
| 112 | EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, possible); |
| 113 | |
| 114 | /* Ensure the dynamic masks are stable while running the tests */ |
| 115 | cpu_hotplug_disable(); |
| 116 | |
| 117 | EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, online); |
| 118 | EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, present); |
| 119 | |
| 120 | cpu_hotplug_enable(); |
| 121 | } |
| 122 | |
| 123 | static int test_cpumask_init(struct kunit *test) |
| 124 | { |
| 125 | cpumask_clear(&mask_empty); |
| 126 | cpumask_setall(&mask_all); |
| 127 | |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | static struct kunit_case test_cpumask_cases[] = { |
| 132 | KUNIT_CASE(test_cpumask_weight), |
| 133 | KUNIT_CASE(test_cpumask_first), |
| 134 | KUNIT_CASE(test_cpumask_last), |
| 135 | KUNIT_CASE(test_cpumask_next), |
| 136 | KUNIT_CASE(test_cpumask_iterators), |
| 137 | KUNIT_CASE(test_cpumask_iterators_builtin), |
| 138 | {} |
| 139 | }; |
| 140 | |
| 141 | static struct kunit_suite test_cpumask_suite = { |
| 142 | .name = "cpumask", |
| 143 | .init = test_cpumask_init, |
| 144 | .test_cases = test_cpumask_cases, |
| 145 | }; |
| 146 | kunit_test_suite(test_cpumask_suite); |
| 147 | |
| 148 | MODULE_LICENSE("GPL"); |