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// SPDX-License-Identifier: GPL-2.0-only
/*
* KUnit tests for cpumask.
*
* Author: Sander Vanheule <sander@svanheule.net>
*/
#include <kunit/test.h>
#include <linux/cpu.h>
#include <linux/cpumask.h>
#define MASK_MSG(m) \
"%s contains %sCPUs %*pbl", #m, (cpumask_weight(m) ? "" : "no "), \
nr_cpumask_bits, cpumask_bits(m)
#define EXPECT_FOR_EACH_CPU_EQ(test, mask) \
do { \
const cpumask_t *m = (mask); \
int mask_weight = cpumask_weight(m); \
int cpu, iter = 0; \
for_each_cpu(cpu, m) \
iter++; \
KUNIT_EXPECT_EQ_MSG((test), mask_weight, iter, MASK_MSG(mask)); \
} while (0)
#define EXPECT_FOR_EACH_CPU_NOT_EQ(test, mask) \
do { \
const cpumask_t *m = (mask); \
int mask_weight = cpumask_weight(m); \
int cpu, iter = 0; \
for_each_cpu_not(cpu, m) \
iter++; \
KUNIT_EXPECT_EQ_MSG((test), nr_cpu_ids - mask_weight, iter, MASK_MSG(mask)); \
} while (0)
#define EXPECT_FOR_EACH_CPU_WRAP_EQ(test, mask) \
do { \
const cpumask_t *m = (mask); \
int mask_weight = cpumask_weight(m); \
int cpu, iter = 0; \
for_each_cpu_wrap(cpu, m, nr_cpu_ids / 2) \
iter++; \
KUNIT_EXPECT_EQ_MSG((test), mask_weight, iter, MASK_MSG(mask)); \
} while (0)
#define EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, name) \
do { \
int mask_weight = num_##name##_cpus(); \
int cpu, iter = 0; \
for_each_##name##_cpu(cpu) \
iter++; \
KUNIT_EXPECT_EQ_MSG((test), mask_weight, iter, MASK_MSG(cpu_##name##_mask)); \
} while (0)
static cpumask_t mask_empty;
static cpumask_t mask_all;
static void test_cpumask_weight(struct kunit *test)
{
KUNIT_EXPECT_TRUE_MSG(test, cpumask_empty(&mask_empty), MASK_MSG(&mask_empty));
KUNIT_EXPECT_TRUE_MSG(test, cpumask_full(&mask_all), MASK_MSG(&mask_all));
KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_weight(&mask_empty), MASK_MSG(&mask_empty));
KUNIT_EXPECT_EQ_MSG(test, nr_cpu_ids, cpumask_weight(cpu_possible_mask),
MASK_MSG(cpu_possible_mask));
KUNIT_EXPECT_EQ_MSG(test, nr_cpumask_bits, cpumask_weight(&mask_all), MASK_MSG(&mask_all));
}
static void test_cpumask_first(struct kunit *test)
{
KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_first(&mask_empty), MASK_MSG(&mask_empty));
KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_first(cpu_possible_mask), MASK_MSG(cpu_possible_mask));
KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_first_zero(&mask_empty), MASK_MSG(&mask_empty));
KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_first_zero(cpu_possible_mask),
MASK_MSG(cpu_possible_mask));
}
static void test_cpumask_last(struct kunit *test)
{
KUNIT_EXPECT_LE_MSG(test, nr_cpumask_bits, cpumask_last(&mask_empty),
MASK_MSG(&mask_empty));
KUNIT_EXPECT_EQ_MSG(test, nr_cpu_ids - 1, cpumask_last(cpu_possible_mask),
MASK_MSG(cpu_possible_mask));
}
static void test_cpumask_next(struct kunit *test)
{
KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_next_zero(-1, &mask_empty), MASK_MSG(&mask_empty));
KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_next_zero(-1, cpu_possible_mask),
MASK_MSG(cpu_possible_mask));
KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_next(-1, &mask_empty),
MASK_MSG(&mask_empty));
KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_next(-1, cpu_possible_mask),
MASK_MSG(cpu_possible_mask));
}
static void test_cpumask_iterators(struct kunit *test)
{
EXPECT_FOR_EACH_CPU_EQ(test, &mask_empty);
EXPECT_FOR_EACH_CPU_NOT_EQ(test, &mask_empty);
EXPECT_FOR_EACH_CPU_WRAP_EQ(test, &mask_empty);
EXPECT_FOR_EACH_CPU_EQ(test, cpu_possible_mask);
EXPECT_FOR_EACH_CPU_NOT_EQ(test, cpu_possible_mask);
EXPECT_FOR_EACH_CPU_WRAP_EQ(test, cpu_possible_mask);
}
static void test_cpumask_iterators_builtin(struct kunit *test)
{
EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, possible);
/* Ensure the dynamic masks are stable while running the tests */
cpu_hotplug_disable();
EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, online);
EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, present);
cpu_hotplug_enable();
}
static int test_cpumask_init(struct kunit *test)
{
cpumask_clear(&mask_empty);
cpumask_setall(&mask_all);
return 0;
}
static struct kunit_case test_cpumask_cases[] = {
KUNIT_CASE(test_cpumask_weight),
KUNIT_CASE(test_cpumask_first),
KUNIT_CASE(test_cpumask_last),
KUNIT_CASE(test_cpumask_next),
KUNIT_CASE(test_cpumask_iterators),
KUNIT_CASE(test_cpumask_iterators_builtin),
{}
};
static struct kunit_suite test_cpumask_suite = {
.name = "cpumask",
.init = test_cpumask_init,
.test_cases = test_cpumask_cases,
};
kunit_test_suite(test_cpumask_suite);
MODULE_LICENSE("GPL");
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