Add test cases for newly added resource APIs.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
kernel/Makefile | 1 +
kernel/resource_kunit.c | 150 ++++++++++++++++++++++++++++++++++++++++
lib/Kconfig.debug | 11 +++
3 files changed, 162 insertions(+)
create mode 100644 kernel/resource_kunit.c
diff --git a/kernel/Makefile b/kernel/Makefile
index af601b9bda0e..aac15aeb9d69 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -123,6 +123,7 @@ obj-$(CONFIG_HAS_IOMEM) += iomem.o
obj-$(CONFIG_RSEQ) += rseq.o
obj-$(CONFIG_WATCH_QUEUE) += watch_queue.o
+obj-$(CONFIG_RESOURCE_KUNIT_TEST) += resource_kunit.o
obj-$(CONFIG_SYSCTL_KUNIT_TEST) += sysctl-test.o
CFLAGS_stackleak.o += $(DISABLE_STACKLEAK_PLUGIN)
diff --git a/kernel/resource_kunit.c b/kernel/resource_kunit.c
new file mode 100644
index 000000000000..9fdbca8426f1
--- /dev/null
+++ b/kernel/resource_kunit.c
@@ -0,0 +1,150 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Test cases for API provided by resource.c and ioport.h
+ */
+
+#include <kunit/test.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+
+#define R0_START 0x0000
+#define R0_END 0xffff
+#define R1_START 0x1234
+#define R1_END 0x2345
+#define R2_START 0x4567
+#define R2_END 0x5678
+#define R3_START 0x6789
+#define R3_END 0x789a
+#define R4_START 0x2000
+#define R4_END 0x7000
+
+static struct resource r0 = { .start = R0_START, .end = R0_END };
+static struct resource r1 = { .start = R1_START, .end = R1_END };
+static struct resource r2 = { .start = R2_START, .end = R2_END };
+static struct resource r3 = { .start = R3_START, .end = R3_END };
+static struct resource r4 = { .start = R4_START, .end = R4_END };
+
+struct result {
+ struct resource *r1;
+ struct resource *r2;
+ struct resource r;
+ bool ret;
+};
+
+static struct result results_for_union[] = {
+ {
+ .r1 = &r1, .r2 = &r0, .r.start = R0_START, .r.end = R0_END, .ret = true,
+ }, {
+ .r1 = &r2, .r2 = &r0, .r.start = R0_START, .r.end = R0_END, .ret = true,
+ }, {
+ .r1 = &r3, .r2 = &r0, .r.start = R0_START, .r.end = R0_END, .ret = true,
+ }, {
+ .r1 = &r4, .r2 = &r0, .r.start = R0_START, .r.end = R0_END, .ret = true,
+ }, {
+ .r1 = &r2, .r2 = &r1, .ret = false,
+ }, {
+ .r1 = &r3, .r2 = &r1, .ret = false,
+ }, {
+ .r1 = &r4, .r2 = &r1, .r.start = R1_START, .r.end = R4_END, .ret = true,
+ }, {
+ .r1 = &r2, .r2 = &r3, .ret = false,
+ }, {
+ .r1 = &r2, .r2 = &r4, .r.start = R4_START, .r.end = R4_END, .ret = true,
+ }, {
+ .r1 = &r3, .r2 = &r4, .r.start = R4_START, .r.end = R3_END, .ret = true,
+ },
+};
+
+static struct result results_for_intersection[] = {
+ {
+ .r1 = &r1, .r2 = &r0, .r.start = R1_START, .r.end = R1_END, .ret = true,
+ }, {
+ .r1 = &r2, .r2 = &r0, .r.start = R2_START, .r.end = R2_END, .ret = true,
+ }, {
+ .r1 = &r3, .r2 = &r0, .r.start = R3_START, .r.end = R3_END, .ret = true,
+ }, {
+ .r1 = &r4, .r2 = &r0, .r.start = R4_START, .r.end = R4_END, .ret = true,
+ }, {
+ .r1 = &r2, .r2 = &r1, .ret = false,
+ }, {
+ .r1 = &r3, .r2 = &r1, .ret = false,
+ }, {
+ .r1 = &r4, .r2 = &r1, .r.start = R4_START, .r.end = R1_END, .ret = true,
+ }, {
+ .r1 = &r2, .r2 = &r3, .ret = false,
+ }, {
+ .r1 = &r2, .r2 = &r4, .r.start = R2_START, .r.end = R2_END, .ret = true,
+ }, {
+ .r1 = &r3, .r2 = &r4, .r.start = R3_START, .r.end = R4_END, .ret = true,
+ },
+};
+
+static void resource_do_test(struct kunit *test, bool ret, struct resource *r,
+ bool exp_ret, struct resource *exp_r,
+ struct resource *r1, struct resource *r2)
+{
+ KUNIT_EXPECT_EQ_MSG(test, ret, exp_ret, "Resources %pR %pR", r1, r2);
+ KUNIT_EXPECT_EQ_MSG(test, r->start, exp_r->start, "Start elements are not equal");
+ KUNIT_EXPECT_EQ_MSG(test, r->end, exp_r->end, "End elements are not equal");
+}
+
+static void resource_do_union_test(struct kunit *test, struct result *r)
+{
+ struct resource result;
+ bool ret;
+
+ memset(&result, 0, sizeof(result));
+ ret = resource_union(r->r1, r->r2, &result);
+ resource_do_test(test, ret, &result, r->ret, &r->r, r->r1, r->r2);
+
+ memset(&result, 0, sizeof(result));
+ ret = resource_union(r->r2, r->r1, &result);
+ resource_do_test(test, ret, &result, r->ret, &r->r, r->r2, r->r1);
+}
+
+static void resource_test_union(struct kunit *test)
+{
+ struct result *r = results_for_union;
+ unsigned int i = 0;
+
+ do {
+ resource_do_union_test(test, &r[i]);
+ } while (++i < ARRAY_SIZE(results_for_union));
+}
+
+static void resource_do_intersection_test(struct kunit *test, struct result *r)
+{
+ struct resource result;
+ bool ret;
+
+ memset(&result, 0, sizeof(result));
+ ret = resource_intersection(r->r1, r->r2, &result);
+ resource_do_test(test, ret, &result, r->ret, &r->r, r->r1, r->r2);
+
+ memset(&result, 0, sizeof(result));
+ ret = resource_intersection(r->r2, r->r1, &result);
+ resource_do_test(test, ret, &result, r->ret, &r->r, r->r2, r->r1);
+}
+
+static void resource_test_intersection(struct kunit *test)
+{
+ struct result *r = results_for_intersection;
+ unsigned int i = 0;
+
+ do {
+ resource_do_intersection_test(test, &r[i]);
+ } while (++i < ARRAY_SIZE(results_for_intersection));
+}
+
+static struct kunit_case resource_test_cases[] = {
+ KUNIT_CASE(resource_test_union),
+ KUNIT_CASE(resource_test_intersection),
+ {}
+};
+
+static struct kunit_suite resource_test_suite = {
+ .name = "resource",
+ .test_cases = resource_test_cases,
+};
+kunit_test_suite(resource_test_suite);
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 8596989423bf..663e7238a56e 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -2232,6 +2232,17 @@ config BITFIELD_KUNIT
If unsure, say N.
+config RESOURCE_KUNIT_TEST
+ tristate "KUnit test for resource API"
+ depends on KUNIT
+ help
+ This builds the resource API unit test.
+ Tests the logic of API provided by resource.c and ioport.h.
+ For more information on KUnit and unit tests in general please refer
+ to the KUnit documentation in Documentation/dev-tools/kunit/.
+
+ If unsure, say N.
+
config SYSCTL_KUNIT_TEST
tristate "KUnit test for sysctl" if !KUNIT_ALL_TESTS
depends on KUNIT
--
2.28.0
