From: Lyude Paul <[email protected]> While making changes to the refcounted interrupt patch series, at some point on my local branch I broke something and ended up writing some kunit tests for testing refcounted interrupts as a result. So, let's include these tests now that we have refcounted interrupts.
Signed-off-by: Lyude Paul <[email protected]> Signed-off-by: Boqun Feng <[email protected]> Link: https://patch.msgid.link/[email protected] --- kernel/irq/Makefile | 1 + kernel/irq/refcount_interrupt_test.c | 109 +++++++++++++++++++++++++++ 2 files changed, 110 insertions(+) create mode 100644 kernel/irq/refcount_interrupt_test.c diff --git a/kernel/irq/Makefile b/kernel/irq/Makefile index 86a2e5ae08f9..44c4d6fc502a 100644 --- a/kernel/irq/Makefile +++ b/kernel/irq/Makefile @@ -16,3 +16,4 @@ obj-$(CONFIG_SMP) += affinity.o obj-$(CONFIG_GENERIC_IRQ_DEBUGFS) += debugfs.o obj-$(CONFIG_GENERIC_IRQ_MATRIX_ALLOCATOR) += matrix.o obj-$(CONFIG_IRQ_KUNIT_TEST) += irq_test.o +obj-$(CONFIG_KUNIT) += refcount_interrupt_test.o diff --git a/kernel/irq/refcount_interrupt_test.c b/kernel/irq/refcount_interrupt_test.c new file mode 100644 index 000000000000..b4f224595f26 --- /dev/null +++ b/kernel/irq/refcount_interrupt_test.c @@ -0,0 +1,109 @@ +// 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_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_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 <[email protected]>"); +MODULE_DESCRIPTION("Refcounted interrupt unit test suite"); +MODULE_LICENSE("GPL"); -- 2.50.1 (Apple Git-155)
