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1// SPDX-License-Identifier: GPL-2.0-only2/*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 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");157