cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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test_bits.c (1814B)

      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
     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_FAILURES
     18	/* these should fail compilation */
     19	GENMASK(0, 1);
     20	GENMASK(0, 10);
     21	GENMASK(9, 10);
     22#endif
     23
     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_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
     42static 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
     62static 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
     69static struct kunit_suite bits_test_suite = {
     70	.name = "bits-test",
     71	.test_cases = bits_test_cases,
     72};
     73kunit_test_suite(bits_test_suite);
     74
     75MODULE_LICENSE("GPL");