// SPDX-License-Identifier: GPL-2.0+ /* * Test cases for functions and macros in bits.h */ #include #include static void genmask_test(struct kunit *test) { KUNIT_EXPECT_EQ(test, 1ul, GENMASK(0, 0)); KUNIT_EXPECT_EQ(test, 3ul, GENMASK(1, 0)); KUNIT_EXPECT_EQ(test, 6ul, GENMASK(2, 1)); KUNIT_EXPECT_EQ(test, 0xFFFFFFFFul, GENMASK(31, 0)); #ifdef TEST_GENMASK_FAILURES /* these should fail compilation */ GENMASK(0, 1); GENMASK(0, 10); GENMASK(9, 10); #endif } static void genmask_ull_test(struct kunit *test) { KUNIT_EXPECT_EQ(test, 1ull, GENMASK_ULL(0, 0)); KUNIT_EXPECT_EQ(test, 3ull, GENMASK_ULL(1, 0)); KUNIT_EXPECT_EQ(test, 0x000000ffffe00000ull, GENMASK_ULL(39, 21)); KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_ULL(63, 0)); #ifdef TEST_GENMASK_FAILURES /* these should fail compilation */ GENMASK_ULL(0, 1); GENMASK_ULL(0, 10); GENMASK_ULL(9, 10); #endif } static void genmask_u128_test(struct kunit *test) { #ifdef CONFIG_ARCH_SUPPORTS_INT128 /* Below 64 bit masks */ KUNIT_EXPECT_EQ(test, 0x0000000000000001ull, GENMASK_U128(0, 0)); KUNIT_EXPECT_EQ(test, 0x0000000000000003ull, GENMASK_U128(1, 0)); KUNIT_EXPECT_EQ(test, 0x0000000000000006ull, GENMASK_U128(2, 1)); KUNIT_EXPECT_EQ(test, 0x00000000ffffffffull, GENMASK_U128(31, 0)); KUNIT_EXPECT_EQ(test, 0x000000ffffe00000ull, GENMASK_U128(39, 21)); KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_U128(63, 0)); /* Above 64 bit masks - only 64 bit portion can be validated once */ KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_U128(64, 0) >> 1); KUNIT_EXPECT_EQ(test, 0x00000000ffffffffull, GENMASK_U128(81, 50) >> 50); KUNIT_EXPECT_EQ(test, 0x0000000000ffffffull, GENMASK_U128(87, 64) >> 64); KUNIT_EXPECT_EQ(test, 0x0000000000ff0000ull, GENMASK_U128(87, 80) >> 64); KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_U128(127, 0) >> 64); KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, (u64)GENMASK_U128(127, 0)); KUNIT_EXPECT_EQ(test, 0x0000000000000003ull, GENMASK_U128(127, 126) >> 126); KUNIT_EXPECT_EQ(test, 0x0000000000000001ull, GENMASK_U128(127, 127) >> 127); #ifdef TEST_GENMASK_FAILURES /* these should fail compilation */ GENMASK_U128(0, 1); GENMASK_U128(0, 10); GENMASK_U128(9, 10); #endif /* TEST_GENMASK_FAILURES */ #endif /* CONFIG_ARCH_SUPPORTS_INT128 */ } static void genmask_input_check_test(struct kunit *test) { unsigned int x, y; int z, w; /* Unknown input */ KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(x, 0)); KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(0, x)); KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(x, y)); KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(z, 0)); KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(0, z)); KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(z, w)); /* Valid input */ KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(1, 1)); KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(39, 21)); KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(100, 80)); KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(110, 65)); KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(127, 0)); } static struct kunit_case bits_test_cases[] = { KUNIT_CASE(genmask_test), KUNIT_CASE(genmask_ull_test), KUNIT_CASE(genmask_u128_test), KUNIT_CASE(genmask_input_check_test), {} }; static struct kunit_suite bits_test_suite = { .name = "bits-test", .test_cases = bits_test_cases, }; kunit_test_suite(bits_test_suite); MODULE_DESCRIPTION("Test cases for functions and macros in bits.h"); MODULE_LICENSE("GPL");