diff options
Diffstat (limited to 'kernel/resource_kunit.c')
| -rw-r--r-- | kernel/resource_kunit.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/kernel/resource_kunit.c b/kernel/resource_kunit.c index 0e509985a44a..42d2d8d20f5d 100644 --- a/kernel/resource_kunit.c +++ b/kernel/resource_kunit.c @@ -7,6 +7,8 @@ #include <linux/ioport.h> #include <linux/kernel.h> #include <linux/string.h> +#include <linux/sizes.h> +#include <linux/mm.h> #define R0_START 0x0000 #define R0_END 0xffff @@ -137,9 +139,150 @@ static void resource_test_intersection(struct kunit *test) } while (++i < ARRAY_SIZE(results_for_intersection)); } +/* + * The test resource tree for region_intersects() test: + * + * BASE-BASE+1M-1 : Test System RAM 0 + * # hole 0 (BASE+1M-BASE+2M) + * BASE+2M-BASE+3M-1 : Test CXL Window 0 + * BASE+3M-BASE+4M-1 : Test System RAM 1 + * BASE+4M-BASE+7M-1 : Test CXL Window 1 + * BASE+4M-BASE+5M-1 : Test System RAM 2 + * BASE+4M+128K-BASE+4M+256K-1: Test Code + * BASE+5M-BASE+6M-1 : Test System RAM 3 + */ +#define RES_TEST_RAM0_OFFSET 0 +#define RES_TEST_RAM0_SIZE SZ_1M +#define RES_TEST_HOLE0_OFFSET (RES_TEST_RAM0_OFFSET + RES_TEST_RAM0_SIZE) +#define RES_TEST_HOLE0_SIZE SZ_1M +#define RES_TEST_WIN0_OFFSET (RES_TEST_HOLE0_OFFSET + RES_TEST_HOLE0_SIZE) +#define RES_TEST_WIN0_SIZE SZ_1M +#define RES_TEST_RAM1_OFFSET (RES_TEST_WIN0_OFFSET + RES_TEST_WIN0_SIZE) +#define RES_TEST_RAM1_SIZE SZ_1M +#define RES_TEST_WIN1_OFFSET (RES_TEST_RAM1_OFFSET + RES_TEST_RAM1_SIZE) +#define RES_TEST_WIN1_SIZE (SZ_1M * 3) +#define RES_TEST_RAM2_OFFSET RES_TEST_WIN1_OFFSET +#define RES_TEST_RAM2_SIZE SZ_1M +#define RES_TEST_CODE_OFFSET (RES_TEST_RAM2_OFFSET + SZ_128K) +#define RES_TEST_CODE_SIZE SZ_128K +#define RES_TEST_RAM3_OFFSET (RES_TEST_RAM2_OFFSET + RES_TEST_RAM2_SIZE) +#define RES_TEST_RAM3_SIZE SZ_1M +#define RES_TEST_TOTAL_SIZE ((RES_TEST_WIN1_OFFSET + RES_TEST_WIN1_SIZE)) + +static void remove_free_resource(void *ctx) +{ + struct resource *res = (struct resource *)ctx; + + remove_resource(res); + kfree(res); +} + +static void resource_test_request_region(struct kunit *test, struct resource *parent, + resource_size_t start, resource_size_t size, + const char *name, unsigned long flags) +{ + struct resource *res; + + res = __request_region(parent, start, size, name, flags); + KUNIT_ASSERT_NOT_NULL(test, res); + kunit_add_action_or_reset(test, remove_free_resource, res); +} + +static void resource_test_insert_resource(struct kunit *test, struct resource *parent, + resource_size_t start, resource_size_t size, + const char *name, unsigned long flags) +{ + struct resource *res; + + res = kzalloc(sizeof(*res), GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(test, res); + + res->name = name; + res->start = start; + res->end = start + size - 1; + res->flags = flags; + if (insert_resource(parent, res)) { + kfree(res); + KUNIT_FAIL_AND_ABORT(test, "Fail to insert resource %pR\n", res); + } + + kunit_add_action_or_reset(test, remove_free_resource, res); +} + +static void resource_test_region_intersects(struct kunit *test) +{ + unsigned long flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY; + struct resource *parent; + resource_size_t start; + + /* Find an iomem_resource hole to hold test resources */ + parent = alloc_free_mem_region(&iomem_resource, RES_TEST_TOTAL_SIZE, SZ_1M, + "test resources"); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent); + start = parent->start; + kunit_add_action_or_reset(test, remove_free_resource, parent); + + resource_test_request_region(test, parent, start + RES_TEST_RAM0_OFFSET, + RES_TEST_RAM0_SIZE, "Test System RAM 0", flags); + resource_test_insert_resource(test, parent, start + RES_TEST_WIN0_OFFSET, + RES_TEST_WIN0_SIZE, "Test CXL Window 0", + IORESOURCE_MEM); + resource_test_request_region(test, parent, start + RES_TEST_RAM1_OFFSET, + RES_TEST_RAM1_SIZE, "Test System RAM 1", flags); + resource_test_insert_resource(test, parent, start + RES_TEST_WIN1_OFFSET, + RES_TEST_WIN1_SIZE, "Test CXL Window 1", + IORESOURCE_MEM); + resource_test_request_region(test, parent, start + RES_TEST_RAM2_OFFSET, + RES_TEST_RAM2_SIZE, "Test System RAM 2", flags); + resource_test_insert_resource(test, parent, start + RES_TEST_CODE_OFFSET, + RES_TEST_CODE_SIZE, "Test Code", flags); + resource_test_request_region(test, parent, start + RES_TEST_RAM3_OFFSET, + RES_TEST_RAM3_SIZE, "Test System RAM 3", flags); + kunit_release_action(test, remove_free_resource, parent); + + KUNIT_EXPECT_EQ(test, REGION_INTERSECTS, + region_intersects(start + RES_TEST_RAM0_OFFSET, PAGE_SIZE, + IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE)); + KUNIT_EXPECT_EQ(test, REGION_INTERSECTS, + region_intersects(start + RES_TEST_RAM0_OFFSET + + RES_TEST_RAM0_SIZE - PAGE_SIZE, 2 * PAGE_SIZE, + IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE)); + KUNIT_EXPECT_EQ(test, REGION_DISJOINT, + region_intersects(start + RES_TEST_HOLE0_OFFSET, PAGE_SIZE, + IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE)); + KUNIT_EXPECT_EQ(test, REGION_DISJOINT, + region_intersects(start + RES_TEST_HOLE0_OFFSET + + RES_TEST_HOLE0_SIZE - PAGE_SIZE, 2 * PAGE_SIZE, + IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE)); + KUNIT_EXPECT_EQ(test, REGION_MIXED, + region_intersects(start + RES_TEST_WIN0_OFFSET + + RES_TEST_WIN0_SIZE - PAGE_SIZE, 2 * PAGE_SIZE, + IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE)); + KUNIT_EXPECT_EQ(test, REGION_INTERSECTS, + region_intersects(start + RES_TEST_RAM1_OFFSET + + RES_TEST_RAM1_SIZE - PAGE_SIZE, 2 * PAGE_SIZE, + IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE)); + KUNIT_EXPECT_EQ(test, REGION_INTERSECTS, + region_intersects(start + RES_TEST_RAM2_OFFSET + + RES_TEST_RAM2_SIZE - PAGE_SIZE, 2 * PAGE_SIZE, + IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE)); + KUNIT_EXPECT_EQ(test, REGION_INTERSECTS, + region_intersects(start + RES_TEST_CODE_OFFSET, PAGE_SIZE, + IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE)); + KUNIT_EXPECT_EQ(test, REGION_INTERSECTS, + region_intersects(start + RES_TEST_RAM2_OFFSET, + RES_TEST_RAM2_SIZE + PAGE_SIZE, + IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE)); + KUNIT_EXPECT_EQ(test, REGION_MIXED, + region_intersects(start + RES_TEST_RAM3_OFFSET, + RES_TEST_RAM3_SIZE + PAGE_SIZE, + IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE)); +} + static struct kunit_case resource_test_cases[] = { KUNIT_CASE(resource_test_union), KUNIT_CASE(resource_test_intersection), + KUNIT_CASE(resource_test_region_intersects), {} }; 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