Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
[platform/kernel/linux-starfive.git] / lib / test_bits.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Test cases for functions and macros in bits.h
4  */
5
6 #include <kunit/test.h>
7 #include <linux/bits.h>
8
9
10 static void genmask_test(struct kunit *test)
11 {
12         KUNIT_EXPECT_EQ(test, 1ul, GENMASK(0, 0));
13         KUNIT_EXPECT_EQ(test, 3ul, GENMASK(1, 0));
14         KUNIT_EXPECT_EQ(test, 6ul, GENMASK(2, 1));
15         KUNIT_EXPECT_EQ(test, 0xFFFFFFFFul, GENMASK(31, 0));
16
17 #ifdef TEST_GENMASK_FAILURES
18         /* these should fail compilation */
19         GENMASK(0, 1);
20         GENMASK(0, 10);
21         GENMASK(9, 10);
22 #endif
23
24
25 }
26
27 static void genmask_ull_test(struct kunit *test)
28 {
29         KUNIT_EXPECT_EQ(test, 1ull, GENMASK_ULL(0, 0));
30         KUNIT_EXPECT_EQ(test, 3ull, GENMASK_ULL(1, 0));
31         KUNIT_EXPECT_EQ(test, 0x000000ffffe00000ull, GENMASK_ULL(39, 21));
32         KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_ULL(63, 0));
33
34 #ifdef TEST_GENMASK_FAILURES
35         /* these should fail compilation */
36         GENMASK_ULL(0, 1);
37         GENMASK_ULL(0, 10);
38         GENMASK_ULL(9, 10);
39 #endif
40 }
41
42 static void genmask_input_check_test(struct kunit *test)
43 {
44         unsigned int x, y;
45         int z, w;
46
47         /* Unknown input */
48         KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(x, 0));
49         KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(0, x));
50         KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(x, y));
51
52         KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(z, 0));
53         KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(0, z));
54         KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(z, w));
55
56         /* Valid input */
57         KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(1, 1));
58         KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(39, 21));
59 }
60
61
62 static struct kunit_case bits_test_cases[] = {
63         KUNIT_CASE(genmask_test),
64         KUNIT_CASE(genmask_ull_test),
65         KUNIT_CASE(genmask_input_check_test),
66         {}
67 };
68
69 static struct kunit_suite bits_test_suite = {
70         .name = "bits-test",
71         .test_cases = bits_test_cases,
72 };
73 kunit_test_suite(bits_test_suite);
74
75 MODULE_LICENSE("GPL");