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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * KUnit tests for cpumask.
4 *
5 * Author: Sander Vanheule <[email protected]>
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_OP_EQ(test, op, mask1, mask2) \
27 do { \
28 const cpumask_t *m1 = (mask1); \
29 const cpumask_t *m2 = (mask2); \
30 int weight; \
31 int cpu, iter = 0; \
32 cpumask_##op(&mask_tmp, m1, m2); \
33 weight = cpumask_weight(&mask_tmp); \
34 for_each_cpu_##op(cpu, mask1, mask2) \
35 iter++; \
36 KUNIT_EXPECT_EQ((test), weight, iter); \
37 } while (0)
38
39#define EXPECT_FOR_EACH_CPU_WRAP_EQ(test, mask) \
40 do { \
41 const cpumask_t *m = (mask); \
42 int mask_weight = cpumask_weight(m); \
43 int cpu, iter = 0; \
44 for_each_cpu_wrap(cpu, m, nr_cpu_ids / 2) \
45 iter++; \
46 KUNIT_EXPECT_EQ_MSG((test), mask_weight, iter, MASK_MSG(mask)); \
47 } while (0)
48
49#define EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, name) \
50 do { \
51 int mask_weight = num_##name##_cpus(); \
52 int cpu, iter = 0; \
53 for_each_##name##_cpu(cpu) \
54 iter++; \
55 KUNIT_EXPECT_EQ_MSG((test), mask_weight, iter, MASK_MSG(cpu_##name##_mask)); \
56 } while (0)
57
58static cpumask_t mask_empty;
59static cpumask_t mask_all;
60static cpumask_t mask_tmp;
61
62static void test_cpumask_weight(struct kunit *test)
63{
64 KUNIT_EXPECT_TRUE_MSG(test, cpumask_empty(&mask_empty), MASK_MSG(&mask_empty));
65 KUNIT_EXPECT_TRUE_MSG(test, cpumask_full(&mask_all), MASK_MSG(&mask_all));
66
67 KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_weight(&mask_empty), MASK_MSG(&mask_empty));
68 KUNIT_EXPECT_EQ_MSG(test, nr_cpu_ids, cpumask_weight(cpu_possible_mask),
69 MASK_MSG(cpu_possible_mask));
70 KUNIT_EXPECT_EQ_MSG(test, nr_cpu_ids, cpumask_weight(&mask_all), MASK_MSG(&mask_all));
71}
72
73static void test_cpumask_first(struct kunit *test)
74{
75 KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_first(&mask_empty), MASK_MSG(&mask_empty));
76 KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_first(cpu_possible_mask), MASK_MSG(cpu_possible_mask));
77
78 KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_first_zero(&mask_empty), MASK_MSG(&mask_empty));
79 KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_first_zero(cpu_possible_mask),
80 MASK_MSG(cpu_possible_mask));
81}
82
83static void test_cpumask_last(struct kunit *test)
84{
85 KUNIT_EXPECT_LE_MSG(test, nr_cpumask_bits, cpumask_last(&mask_empty),
86 MASK_MSG(&mask_empty));
87 KUNIT_EXPECT_EQ_MSG(test, nr_cpu_ids - 1, cpumask_last(cpu_possible_mask),
88 MASK_MSG(cpu_possible_mask));
89}
90
91static void test_cpumask_next(struct kunit *test)
92{
93 KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_next_zero(-1, &mask_empty), MASK_MSG(&mask_empty));
94 KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_next_zero(-1, cpu_possible_mask),
95 MASK_MSG(cpu_possible_mask));
96
97 KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_next(-1, &mask_empty),
98 MASK_MSG(&mask_empty));
99 KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_next(-1, cpu_possible_mask),
100 MASK_MSG(cpu_possible_mask));
101}
102
103static void test_cpumask_iterators(struct kunit *test)
104{
105 EXPECT_FOR_EACH_CPU_EQ(test, &mask_empty);
106 EXPECT_FOR_EACH_CPU_WRAP_EQ(test, &mask_empty);
107 EXPECT_FOR_EACH_CPU_OP_EQ(test, and, &mask_empty, &mask_empty);
108 EXPECT_FOR_EACH_CPU_OP_EQ(test, and, cpu_possible_mask, &mask_empty);
109 EXPECT_FOR_EACH_CPU_OP_EQ(test, andnot, &mask_empty, &mask_empty);
110
111 EXPECT_FOR_EACH_CPU_EQ(test, cpu_possible_mask);
112 EXPECT_FOR_EACH_CPU_WRAP_EQ(test, cpu_possible_mask);
113 EXPECT_FOR_EACH_CPU_OP_EQ(test, and, cpu_possible_mask, cpu_possible_mask);
114 EXPECT_FOR_EACH_CPU_OP_EQ(test, andnot, cpu_possible_mask, &mask_empty);
115}
116
117static void test_cpumask_iterators_builtin(struct kunit *test)
118{
119 EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, possible);
120
121 /* Ensure the dynamic masks are stable while running the tests */
122 cpu_hotplug_disable();
123
124 EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, online);
125 EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, present);
126
127 cpu_hotplug_enable();
128}
129
130static int test_cpumask_init(struct kunit *test)
131{
132 cpumask_clear(&mask_empty);
133 cpumask_setall(&mask_all);
134
135 return 0;
136}
137
138static struct kunit_case test_cpumask_cases[] = {
139 KUNIT_CASE(test_cpumask_weight),
140 KUNIT_CASE(test_cpumask_first),
141 KUNIT_CASE(test_cpumask_last),
142 KUNIT_CASE(test_cpumask_next),
143 KUNIT_CASE(test_cpumask_iterators),
144 KUNIT_CASE(test_cpumask_iterators_builtin),
145 {}
146};
147
148static struct kunit_suite test_cpumask_suite = {
149 .name = "cpumask",
150 .init = test_cpumask_init,
151 .test_cases = test_cpumask_cases,
152};
153kunit_test_suite(test_cpumask_suite);
154
155MODULE_DESCRIPTION("KUnit tests for cpumask");
156MODULE_LICENSE("GPL");