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_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 | |
58 | static cpumask_t mask_empty; |
59 | static cpumask_t mask_all; |
60 | static cpumask_t mask_tmp; |
61 | |
62 | static 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 | |
73 | static 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 | |
83 | static 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 | |
91 | static 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 | |
103 | static 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 | |
117 | static 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 | |
130 | static int test_cpumask_init(struct kunit *test) |
131 | { |
132 | cpumask_clear(dstp: &mask_empty); |
133 | cpumask_setall(dstp: &mask_all); |
134 | |
135 | return 0; |
136 | } |
137 | |
138 | static 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 | |
148 | static struct kunit_suite test_cpumask_suite = { |
149 | .name = "cpumask" , |
150 | .init = test_cpumask_init, |
151 | .test_cases = test_cpumask_cases, |
152 | }; |
153 | kunit_test_suite(test_cpumask_suite); |
154 | |
155 | MODULE_LICENSE("GPL" ); |
156 | |