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1// SPDX-License-Identifier: GPL-2.0+2/*3 * Test cases for functions and macros in bits.h4 */5 6#include <kunit/test.h>7#include <linux/bits.h>8 9 10static 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_FAILURES18 /* these should fail compilation */19 GENMASK(0, 1);20 GENMASK(0, 10);21 GENMASK(9, 10);22#endif23 24 25}26 27static 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_FAILURES35 /* these should fail compilation */36 GENMASK_ULL(0, 1);37 GENMASK_ULL(0, 10);38 GENMASK_ULL(9, 10);39#endif40}41 42static void genmask_u128_test(struct kunit *test)43{44#ifdef CONFIG_ARCH_SUPPORTS_INT12845 /* Below 64 bit masks */46 KUNIT_EXPECT_EQ(test, 0x0000000000000001ull, GENMASK_U128(0, 0));47 KUNIT_EXPECT_EQ(test, 0x0000000000000003ull, GENMASK_U128(1, 0));48 KUNIT_EXPECT_EQ(test, 0x0000000000000006ull, GENMASK_U128(2, 1));49 KUNIT_EXPECT_EQ(test, 0x00000000ffffffffull, GENMASK_U128(31, 0));50 KUNIT_EXPECT_EQ(test, 0x000000ffffe00000ull, GENMASK_U128(39, 21));51 KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_U128(63, 0));52 53 /* Above 64 bit masks - only 64 bit portion can be validated once */54 KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_U128(64, 0) >> 1);55 KUNIT_EXPECT_EQ(test, 0x00000000ffffffffull, GENMASK_U128(81, 50) >> 50);56 KUNIT_EXPECT_EQ(test, 0x0000000000ffffffull, GENMASK_U128(87, 64) >> 64);57 KUNIT_EXPECT_EQ(test, 0x0000000000ff0000ull, GENMASK_U128(87, 80) >> 64);58 59 KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_U128(127, 0) >> 64);60 KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, (u64)GENMASK_U128(127, 0));61 KUNIT_EXPECT_EQ(test, 0x0000000000000003ull, GENMASK_U128(127, 126) >> 126);62 KUNIT_EXPECT_EQ(test, 0x0000000000000001ull, GENMASK_U128(127, 127) >> 127);63#ifdef TEST_GENMASK_FAILURES64 /* these should fail compilation */65 GENMASK_U128(0, 1);66 GENMASK_U128(0, 10);67 GENMASK_U128(9, 10);68#endif /* TEST_GENMASK_FAILURES */69#endif /* CONFIG_ARCH_SUPPORTS_INT128 */70}71 72static void genmask_input_check_test(struct kunit *test)73{74 unsigned int x, y;75 int z, w;76 77 /* Unknown input */78 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(x, 0));79 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(0, x));80 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(x, y));81 82 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(z, 0));83 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(0, z));84 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(z, w));85 86 /* Valid input */87 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(1, 1));88 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(39, 21));89 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(100, 80));90 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(110, 65));91 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(127, 0));92}93 94 95static struct kunit_case bits_test_cases[] = {96 KUNIT_CASE(genmask_test),97 KUNIT_CASE(genmask_ull_test),98 KUNIT_CASE(genmask_u128_test),99 KUNIT_CASE(genmask_input_check_test),100 {}101};102 103static struct kunit_suite bits_test_suite = {104 .name = "bits-test",105 .test_cases = bits_test_cases,106};107kunit_test_suite(bits_test_suite);108 109MODULE_DESCRIPTION("Test cases for functions and macros in bits.h");110MODULE_LICENSE("GPL");111