diff options
Diffstat (limited to 'drivers/virt/nitro_enclaves/ne_misc_dev_test.c')
| -rw-r--r-- | drivers/virt/nitro_enclaves/ne_misc_dev_test.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/drivers/virt/nitro_enclaves/ne_misc_dev_test.c b/drivers/virt/nitro_enclaves/ne_misc_dev_test.c new file mode 100644 index 000000000000..265797bed0ea --- /dev/null +++ b/drivers/virt/nitro_enclaves/ne_misc_dev_test.c @@ -0,0 +1,157 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <kunit/test.h> + +#define MAX_PHYS_REGIONS 16 +#define INVALID_VALUE (~0ull) + +struct ne_phys_regions_test { + u64 paddr; + u64 size; + int expect_rc; + unsigned long expect_num; + u64 expect_last_paddr; + u64 expect_last_size; +} phys_regions_test_cases[] = { + /* + * Add the region from 0x1000 to (0x1000 + 0x200000 - 1): + * Expected result: + * Failed, start address is not 2M-aligned + * + * Now the instance of struct ne_phys_contig_mem_regions is: + * num = 0 + * regions = {} + */ + {0x1000, 0x200000, -EINVAL, 0, INVALID_VALUE, INVALID_VALUE}, + + /* + * Add the region from 0x200000 to (0x200000 + 0x1000 - 1): + * Expected result: + * Failed, size is not 2M-aligned + * + * Now the instance of struct ne_phys_contig_mem_regions is: + * num = 0 + * regions = {} + */ + {0x200000, 0x1000, -EINVAL, 0, INVALID_VALUE, INVALID_VALUE}, + + /* + * Add the region from 0x200000 to (0x200000 + 0x200000 - 1): + * Expected result: + * Successful + * + * Now the instance of struct ne_phys_contig_mem_regions is: + * num = 1 + * regions = { + * {start=0x200000, end=0x3fffff}, // len=0x200000 + * } + */ + {0x200000, 0x200000, 0, 1, 0x200000, 0x200000}, + + /* + * Add the region from 0x0 to (0x0 + 0x200000 - 1): + * Expected result: + * Successful + * + * Now the instance of struct ne_phys_contig_mem_regions is: + * num = 2 + * regions = { + * {start=0x200000, end=0x3fffff}, // len=0x200000 + * {start=0x0, end=0x1fffff}, // len=0x200000 + * } + */ + {0x0, 0x200000, 0, 2, 0x0, 0x200000}, + + /* + * Add the region from 0x600000 to (0x600000 + 0x400000 - 1): + * Expected result: + * Successful + * + * Now the instance of struct ne_phys_contig_mem_regions is: + * num = 3 + * regions = { + * {start=0x200000, end=0x3fffff}, // len=0x200000 + * {start=0x0, end=0x1fffff}, // len=0x200000 + * {start=0x600000, end=0x9fffff}, // len=0x400000 + * } + */ + {0x600000, 0x400000, 0, 3, 0x600000, 0x400000}, + + /* + * Add the region from 0xa00000 to (0xa00000 + 0x400000 - 1): + * Expected result: + * Successful, merging case! + * + * Now the instance of struct ne_phys_contig_mem_regions is: + * num = 3 + * regions = { + * {start=0x200000, end=0x3fffff}, // len=0x200000 + * {start=0x0, end=0x1fffff}, // len=0x200000 + * {start=0x600000, end=0xdfffff}, // len=0x800000 + * } + */ + {0xa00000, 0x400000, 0, 3, 0x600000, 0x800000}, + + /* + * Add the region from 0x1000 to (0x1000 + 0x200000 - 1): + * Expected result: + * Failed, start address is not 2M-aligned + * + * Now the instance of struct ne_phys_contig_mem_regions is: + * num = 3 + * regions = { + * {start=0x200000, end=0x3fffff}, // len=0x200000 + * {start=0x0, end=0x1fffff}, // len=0x200000 + * {start=0x600000, end=0xdfffff}, // len=0x800000 + * } + */ + {0x1000, 0x200000, -EINVAL, 3, 0x600000, 0x800000}, +}; + +static void ne_misc_dev_test_merge_phys_contig_memory_regions(struct kunit *test) +{ + struct ne_phys_contig_mem_regions phys_contig_mem_regions = {}; + int rc = 0; + int i = 0; + + phys_contig_mem_regions.regions = kunit_kcalloc(test, MAX_PHYS_REGIONS, + sizeof(*phys_contig_mem_regions.regions), + GFP_KERNEL); + KUNIT_ASSERT_TRUE(test, phys_contig_mem_regions.regions); + + for (i = 0; i < ARRAY_SIZE(phys_regions_test_cases); i++) { + struct ne_phys_regions_test *test_case = &phys_regions_test_cases[i]; + unsigned long num = 0; + + rc = ne_merge_phys_contig_memory_regions(&phys_contig_mem_regions, + test_case->paddr, test_case->size); + KUNIT_EXPECT_EQ(test, rc, test_case->expect_rc); + KUNIT_EXPECT_EQ(test, phys_contig_mem_regions.num, test_case->expect_num); + + if (test_case->expect_last_paddr == INVALID_VALUE) + continue; + + num = phys_contig_mem_regions.num; + KUNIT_EXPECT_EQ(test, phys_contig_mem_regions.regions[num - 1].start, + test_case->expect_last_paddr); + KUNIT_EXPECT_EQ(test, range_len(&phys_contig_mem_regions.regions[num - 1]), + test_case->expect_last_size); + } + + kunit_kfree(test, phys_contig_mem_regions.regions); +} + +static struct kunit_case ne_misc_dev_test_cases[] = { + KUNIT_CASE(ne_misc_dev_test_merge_phys_contig_memory_regions), + {} +}; + +static struct kunit_suite ne_misc_dev_test_suite = { + .name = "ne_misc_dev_test", + .test_cases = ne_misc_dev_test_cases, +}; + +static struct kunit_suite *ne_misc_dev_test_suites[] = { + &ne_misc_dev_test_suite, + NULL +}; |