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c41e8866c2
Add a basic suite of tests for cpumask, providing some tests for empty and completely filled cpumasks. Link: https://lkml.kernel.org/r/c96980ec35c3bd23f17c3374bf42c22971545e85.1656777646.git.sander@svanheule.net Signed-off-by: Sander Vanheule <sander@svanheule.net> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Suggested-by: Yury Norov <yury.norov@gmail.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Marco Elver <elver@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Valentin Schneider <vschneid@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
138 lines
3.8 KiB
C
138 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* KUnit tests for cpumask.
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*
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* Author: Sander Vanheule <sander@svanheule.net>
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*/
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#include <kunit/test.h>
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#include <linux/cpu.h>
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#include <linux/cpumask.h>
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#define EXPECT_FOR_EACH_CPU_EQ(test, mask) \
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do { \
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const cpumask_t *m = (mask); \
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int mask_weight = cpumask_weight(m); \
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int cpu, iter = 0; \
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for_each_cpu(cpu, m) \
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iter++; \
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KUNIT_EXPECT_EQ((test), mask_weight, iter); \
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} while (0)
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#define EXPECT_FOR_EACH_CPU_NOT_EQ(test, mask) \
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do { \
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const cpumask_t *m = (mask); \
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int mask_weight = cpumask_weight(m); \
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int cpu, iter = 0; \
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for_each_cpu_not(cpu, m) \
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iter++; \
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KUNIT_EXPECT_EQ((test), nr_cpu_ids - mask_weight, iter); \
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} while (0)
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#define EXPECT_FOR_EACH_CPU_WRAP_EQ(test, mask) \
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do { \
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const cpumask_t *m = (mask); \
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int mask_weight = cpumask_weight(m); \
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int cpu, iter = 0; \
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for_each_cpu_wrap(cpu, m, nr_cpu_ids / 2) \
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iter++; \
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KUNIT_EXPECT_EQ((test), mask_weight, iter); \
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} while (0)
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#define EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, name) \
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do { \
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int mask_weight = num_##name##_cpus(); \
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int cpu, iter = 0; \
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for_each_##name##_cpu(cpu) \
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iter++; \
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KUNIT_EXPECT_EQ((test), mask_weight, iter); \
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} while (0)
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static cpumask_t mask_empty;
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static cpumask_t mask_all;
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static void test_cpumask_weight(struct kunit *test)
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{
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KUNIT_EXPECT_TRUE(test, cpumask_empty(&mask_empty));
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KUNIT_EXPECT_TRUE(test, cpumask_full(cpu_possible_mask));
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KUNIT_EXPECT_TRUE(test, cpumask_full(&mask_all));
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KUNIT_EXPECT_EQ(test, 0, cpumask_weight(&mask_empty));
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KUNIT_EXPECT_EQ(test, nr_cpu_ids, cpumask_weight(cpu_possible_mask));
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KUNIT_EXPECT_EQ(test, nr_cpumask_bits, cpumask_weight(&mask_all));
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}
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static void test_cpumask_first(struct kunit *test)
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{
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KUNIT_EXPECT_LE(test, nr_cpu_ids, cpumask_first(&mask_empty));
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KUNIT_EXPECT_EQ(test, 0, cpumask_first(cpu_possible_mask));
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KUNIT_EXPECT_EQ(test, 0, cpumask_first_zero(&mask_empty));
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KUNIT_EXPECT_LE(test, nr_cpu_ids, cpumask_first_zero(cpu_possible_mask));
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}
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static void test_cpumask_last(struct kunit *test)
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{
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KUNIT_EXPECT_LE(test, nr_cpumask_bits, cpumask_last(&mask_empty));
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KUNIT_EXPECT_EQ(test, nr_cpumask_bits - 1, cpumask_last(cpu_possible_mask));
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}
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static void test_cpumask_next(struct kunit *test)
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{
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KUNIT_EXPECT_EQ(test, 0, cpumask_next_zero(-1, &mask_empty));
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KUNIT_EXPECT_LE(test, nr_cpu_ids, cpumask_next_zero(-1, cpu_possible_mask));
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KUNIT_EXPECT_LE(test, nr_cpu_ids, cpumask_next(-1, &mask_empty));
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KUNIT_EXPECT_EQ(test, 0, cpumask_next(-1, cpu_possible_mask));
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}
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static void test_cpumask_iterators(struct kunit *test)
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{
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EXPECT_FOR_EACH_CPU_EQ(test, &mask_empty);
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EXPECT_FOR_EACH_CPU_NOT_EQ(test, &mask_empty);
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EXPECT_FOR_EACH_CPU_WRAP_EQ(test, &mask_empty);
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EXPECT_FOR_EACH_CPU_EQ(test, cpu_possible_mask);
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EXPECT_FOR_EACH_CPU_NOT_EQ(test, cpu_possible_mask);
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EXPECT_FOR_EACH_CPU_WRAP_EQ(test, cpu_possible_mask);
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}
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static void test_cpumask_iterators_builtin(struct kunit *test)
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{
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EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, possible);
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/* Ensure the dynamic masks are stable while running the tests */
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cpu_hotplug_disable();
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EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, online);
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EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, present);
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cpu_hotplug_enable();
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}
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static int test_cpumask_init(struct kunit *test)
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{
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cpumask_clear(&mask_empty);
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cpumask_setall(&mask_all);
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return 0;
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}
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static struct kunit_case test_cpumask_cases[] = {
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KUNIT_CASE(test_cpumask_weight),
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KUNIT_CASE(test_cpumask_first),
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KUNIT_CASE(test_cpumask_last),
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KUNIT_CASE(test_cpumask_next),
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KUNIT_CASE(test_cpumask_iterators),
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KUNIT_CASE(test_cpumask_iterators_builtin),
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{}
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};
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static struct kunit_suite test_cpumask_suite = {
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.name = "cpumask",
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.init = test_cpumask_init,
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.test_cases = test_cpumask_cases,
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};
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kunit_test_suite(test_cpumask_suite);
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MODULE_LICENSE("GPL");
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