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// SPDX-License-Identifier: GPL-2.0
/*
* KUnit test for refcounted interrupt enable/disables.
*/
#include <kunit/test.h>
#include <linux/interrupt_rc.h>
#define TEST_IRQ_ON() KUNIT_EXPECT_FALSE(test, irqs_disabled())
#define TEST_IRQ_OFF() KUNIT_EXPECT_TRUE(test, irqs_disabled())
/* ===== Test cases ===== */
static void test_single_irq_change(struct kunit *test)
{
local_interrupt_disable();
TEST_IRQ_OFF();
local_interrupt_enable();
}
static void test_nested_irq_change(struct kunit *test)
{
local_interrupt_disable();
TEST_IRQ_OFF();
local_interrupt_disable();
TEST_IRQ_OFF();
local_interrupt_disable();
TEST_IRQ_OFF();
local_interrupt_enable();
TEST_IRQ_OFF();
local_interrupt_enable();
TEST_IRQ_OFF();
local_interrupt_enable();
TEST_IRQ_ON();
}
static void test_multiple_irq_change(struct kunit *test)
{
local_interrupt_disable();
TEST_IRQ_OFF();
local_interrupt_disable();
TEST_IRQ_OFF();
local_interrupt_enable();
TEST_IRQ_OFF();
local_interrupt_enable();
TEST_IRQ_ON();
local_interrupt_disable();
TEST_IRQ_OFF();
local_interrupt_enable();
TEST_IRQ_ON();
}
static void test_max_nesting_irq_change(struct kunit *test)
{
for (int i = 0; i < __IRQ_MASK(HARDIRQ_DISABLE_BITS); i++) {
local_interrupt_disable();
TEST_IRQ_OFF();
}
for (int i = 0; i < __IRQ_MASK(HARDIRQ_DISABLE_BITS); i++) {
TEST_IRQ_OFF();
local_interrupt_enable();
}
TEST_IRQ_ON();
local_interrupt_disable();
TEST_IRQ_OFF();
local_interrupt_enable();
TEST_IRQ_ON();
}
static void test_irq_save(struct kunit *test)
{
unsigned long flags;
local_irq_save(flags);
TEST_IRQ_OFF();
local_interrupt_disable();
TEST_IRQ_OFF();
local_interrupt_enable();
TEST_IRQ_OFF();
local_irq_restore(flags);
TEST_IRQ_ON();
local_interrupt_disable();
TEST_IRQ_OFF();
local_irq_save(flags);
TEST_IRQ_OFF();
local_irq_restore(flags);
TEST_IRQ_OFF();
local_interrupt_enable();
TEST_IRQ_ON();
}
static struct kunit_case test_cases[] = {
KUNIT_CASE(test_single_irq_change),
KUNIT_CASE(test_nested_irq_change),
KUNIT_CASE(test_multiple_irq_change),
KUNIT_CASE(test_max_nesting_irq_change),
KUNIT_CASE(test_irq_save),
{},
};
/* init and exit are the same. */
static int test_init(struct kunit *test)
{
TEST_IRQ_ON();
return 0;
}
static void test_exit(struct kunit *test)
{
TEST_IRQ_ON();
}
static struct kunit_suite refcount_interrupt_test_suite = {
.name = "refcount_interrupt",
.test_cases = test_cases,
.init = test_init,
.exit = test_exit,
};
kunit_test_suite(refcount_interrupt_test_suite);
MODULE_AUTHOR("Lyude Paul <lyude@redhat.com>");
MODULE_DESCRIPTION("Refcounted interrupt unit test suite");
MODULE_LICENSE("GPL");
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