tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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_OP_EQ(test, op, mask1, mask2) \
37 do { \
38 const cpumask_t *m1 = (mask1); \
39 const cpumask_t *m2 = (mask2); \
40 int weight; \
41 int cpu, iter = 0; \
42 cpumask_##op(&mask_tmp, m1, m2); \
43 weight = cpumask_weight(&mask_tmp); \
44 for_each_cpu_##op(cpu, mask1, mask2) \
45 iter++; \
46 KUNIT_EXPECT_EQ((test), weight, iter); \
47 } while (0)
48
49#define EXPECT_FOR_EACH_CPU_WRAP_EQ(test, mask) \
50 do { \
51 const cpumask_t *m = (mask); \
52 int mask_weight = cpumask_weight(m); \
53 int cpu, iter = 0; \
54 for_each_cpu_wrap(cpu, m, nr_cpu_ids / 2) \
55 iter++; \
56 KUNIT_EXPECT_EQ_MSG((test), mask_weight, iter, MASK_MSG(mask)); \
57 } while (0)
58
59#define EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, name) \
60 do { \
61 int mask_weight = num_##name##_cpus(); \
62 int cpu, iter = 0; \
63 for_each_##name##_cpu(cpu) \
64 iter++; \
65 KUNIT_EXPECT_EQ_MSG((test), mask_weight, iter, MASK_MSG(cpu_##name##_mask)); \
66 } while (0)
67
68static cpumask_t mask_empty;
69static cpumask_t mask_all;
70static cpumask_t mask_tmp;
71
72static void test_cpumask_weight(struct kunit *test)
73{
74 KUNIT_EXPECT_TRUE_MSG(test, cpumask_empty(&mask_empty), MASK_MSG(&mask_empty));
75 KUNIT_EXPECT_TRUE_MSG(test, cpumask_full(&mask_all), MASK_MSG(&mask_all));
76
77 KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_weight(&mask_empty), MASK_MSG(&mask_empty));
78 KUNIT_EXPECT_EQ_MSG(test, nr_cpu_ids, cpumask_weight(cpu_possible_mask),
79 MASK_MSG(cpu_possible_mask));
80 KUNIT_EXPECT_EQ_MSG(test, nr_cpumask_bits, cpumask_weight(&mask_all), MASK_MSG(&mask_all));
81}
82
83static void test_cpumask_first(struct kunit *test)
84{
85 KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_first(&mask_empty), MASK_MSG(&mask_empty));
86 KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_first(cpu_possible_mask), MASK_MSG(cpu_possible_mask));
87
88 KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_first_zero(&mask_empty), MASK_MSG(&mask_empty));
89 KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_first_zero(cpu_possible_mask),
90 MASK_MSG(cpu_possible_mask));
91}
92
93static void test_cpumask_last(struct kunit *test)
94{
95 KUNIT_EXPECT_LE_MSG(test, nr_cpumask_bits, cpumask_last(&mask_empty),
96 MASK_MSG(&mask_empty));
97 KUNIT_EXPECT_EQ_MSG(test, nr_cpu_ids - 1, cpumask_last(cpu_possible_mask),
98 MASK_MSG(cpu_possible_mask));
99}
100
101static void test_cpumask_next(struct kunit *test)
102{
103 KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_next_zero(-1, &mask_empty), MASK_MSG(&mask_empty));
104 KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_next_zero(-1, cpu_possible_mask),
105 MASK_MSG(cpu_possible_mask));
106
107 KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_next(-1, &mask_empty),
108 MASK_MSG(&mask_empty));
109 KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_next(-1, cpu_possible_mask),
110 MASK_MSG(cpu_possible_mask));
111}
112
113static void test_cpumask_iterators(struct kunit *test)
114{
115 EXPECT_FOR_EACH_CPU_EQ(test, &mask_empty);
116 EXPECT_FOR_EACH_CPU_NOT_EQ(test, &mask_empty);
117 EXPECT_FOR_EACH_CPU_WRAP_EQ(test, &mask_empty);
118 EXPECT_FOR_EACH_CPU_OP_EQ(test, and, &mask_empty, &mask_empty);
119 EXPECT_FOR_EACH_CPU_OP_EQ(test, and, cpu_possible_mask, &mask_empty);
120 EXPECT_FOR_EACH_CPU_OP_EQ(test, andnot, &mask_empty, &mask_empty);
121
122 EXPECT_FOR_EACH_CPU_EQ(test, cpu_possible_mask);
123 EXPECT_FOR_EACH_CPU_NOT_EQ(test, cpu_possible_mask);
124 EXPECT_FOR_EACH_CPU_WRAP_EQ(test, cpu_possible_mask);
125 EXPECT_FOR_EACH_CPU_OP_EQ(test, and, cpu_possible_mask, cpu_possible_mask);
126 EXPECT_FOR_EACH_CPU_OP_EQ(test, andnot, cpu_possible_mask, &mask_empty);
127}
128
129static void test_cpumask_iterators_builtin(struct kunit *test)
130{
131 EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, possible);
132
133 /* Ensure the dynamic masks are stable while running the tests */
134 cpu_hotplug_disable();
135
136 EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, online);
137 EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, present);
138
139 cpu_hotplug_enable();
140}
141
142static int test_cpumask_init(struct kunit *test)
143{
144 cpumask_clear(&mask_empty);
145 cpumask_setall(&mask_all);
146
147 return 0;
148}
149
150static struct kunit_case test_cpumask_cases[] = {
151 KUNIT_CASE(test_cpumask_weight),
152 KUNIT_CASE(test_cpumask_first),
153 KUNIT_CASE(test_cpumask_last),
154 KUNIT_CASE(test_cpumask_next),
155 KUNIT_CASE(test_cpumask_iterators),
156 KUNIT_CASE(test_cpumask_iterators_builtin),
157 {}
158};
159
160static struct kunit_suite test_cpumask_suite = {
161 .name = "cpumask",
162 .init = test_cpumask_init,
163 .test_cases = test_cpumask_cases,
164};
165kunit_test_suite(test_cpumask_suite);
166
167MODULE_LICENSE("GPL");