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authorRebecca Mckeever <remckee0@gmail.com>2022-08-27 00:42:50 -0500
committerMike Rapoport <rppt@linux.ibm.com>2022-08-30 13:12:00 +0300
commitdcd45ad2ad784c35bfba8ae93c285574bc2a8a1e (patch)
tree35b43162c0d4805dc8349a3ee75766e84084ce32 /tools/testing/memblock
parenta541c6d428f775efcfe25236062c96b59e31b57a (diff)
memblock tests: add tests for memblock_trim_memory
Add tests for memblock_trim_memory() for the following scenarios: - all regions aligned - one unaligned region that is smaller than the alignment - one unaligned region that is unaligned at the base - one unaligned region that is unaligned at the end Reviewed-by: Shaoqin Huang <shaoqin.huang@intel.com> Signed-off-by: Rebecca Mckeever <remckee0@gmail.com> Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Link: https://lore.kernel.org/r/0e5f55154a3b66581e04ba3717978795cbc08a5b.1661578349.git.remckee0@gmail.com
Diffstat (limited to 'tools/testing/memblock')
-rw-r--r--tools/testing/memblock/tests/basic_api.c223
1 files changed, 223 insertions, 0 deletions
diff --git a/tools/testing/memblock/tests/basic_api.c b/tools/testing/memblock/tests/basic_api.c
index c7490291c485..a13a57ba0815 100644
--- a/tools/testing/memblock/tests/basic_api.c
+++ b/tools/testing/memblock/tests/basic_api.c
@@ -8,6 +8,7 @@
#define FUNC_RESERVE "memblock_reserve"
#define FUNC_REMOVE "memblock_remove"
#define FUNC_FREE "memblock_free"
+#define FUNC_TRIM "memblock_trim_memory"
static int memblock_initialization_check(void)
{
@@ -1723,6 +1724,227 @@ static int memblock_bottom_up_checks(void)
return 0;
}
+/*
+ * A test that tries to trim memory when both ends of the memory region are
+ * aligned. Expect that the memory will not be trimmed. Expect the counter to
+ * not be updated.
+ */
+static int memblock_trim_memory_aligned_check(void)
+{
+ struct memblock_region *rgn;
+ const phys_addr_t alignment = SMP_CACHE_BYTES;
+
+ rgn = &memblock.memory.regions[0];
+
+ struct region r = {
+ .base = alignment,
+ .size = alignment * 4
+ };
+
+ PREFIX_PUSH();
+
+ reset_memblock_regions();
+ memblock_add(r.base, r.size);
+ memblock_trim_memory(alignment);
+
+ ASSERT_EQ(rgn->base, r.base);
+ ASSERT_EQ(rgn->size, r.size);
+
+ ASSERT_EQ(memblock.memory.cnt, 1);
+
+ test_pass_pop();
+
+ return 0;
+}
+
+/*
+ * A test that tries to trim memory when there are two available regions, r1 and
+ * r2. Region r1 is aligned on both ends and region r2 is unaligned on one end
+ * and smaller than the alignment:
+ *
+ * alignment
+ * |--------|
+ * | +-----------------+ +------+ |
+ * | | r1 | | r2 | |
+ * +--------+-----------------+--------+------+---+
+ * ^ ^ ^ ^ ^
+ * |________|________|________| |
+ * | Unaligned address
+ * Aligned addresses
+ *
+ * Expect that r1 will not be trimmed and r2 will be removed. Expect the
+ * counter to be updated.
+ */
+static int memblock_trim_memory_too_small_check(void)
+{
+ struct memblock_region *rgn;
+ const phys_addr_t alignment = SMP_CACHE_BYTES;
+
+ rgn = &memblock.memory.regions[0];
+
+ struct region r1 = {
+ .base = alignment,
+ .size = alignment * 2
+ };
+ struct region r2 = {
+ .base = alignment * 4,
+ .size = alignment - SZ_2
+ };
+
+ PREFIX_PUSH();
+
+ reset_memblock_regions();
+ memblock_add(r1.base, r1.size);
+ memblock_add(r2.base, r2.size);
+ memblock_trim_memory(alignment);
+
+ ASSERT_EQ(rgn->base, r1.base);
+ ASSERT_EQ(rgn->size, r1.size);
+
+ ASSERT_EQ(memblock.memory.cnt, 1);
+
+ test_pass_pop();
+
+ return 0;
+}
+
+/*
+ * A test that tries to trim memory when there are two available regions, r1 and
+ * r2. Region r1 is aligned on both ends and region r2 is unaligned at the base
+ * and aligned at the end:
+ *
+ * Unaligned address
+ * |
+ * v
+ * | +-----------------+ +---------------+ |
+ * | | r1 | | r2 | |
+ * +--------+-----------------+----------+---------------+---+
+ * ^ ^ ^ ^ ^ ^
+ * |________|________|________|________|________|
+ * |
+ * Aligned addresses
+ *
+ * Expect that r1 will not be trimmed and r2 will be trimmed at the base.
+ * Expect the counter to not be updated.
+ */
+static int memblock_trim_memory_unaligned_base_check(void)
+{
+ struct memblock_region *rgn1, *rgn2;
+ const phys_addr_t alignment = SMP_CACHE_BYTES;
+ phys_addr_t offset = SZ_2;
+ phys_addr_t new_r2_base, new_r2_size;
+
+ rgn1 = &memblock.memory.regions[0];
+ rgn2 = &memblock.memory.regions[1];
+
+ struct region r1 = {
+ .base = alignment,
+ .size = alignment * 2
+ };
+ struct region r2 = {
+ .base = alignment * 4 + offset,
+ .size = alignment * 2 - offset
+ };
+
+ PREFIX_PUSH();
+
+ new_r2_base = r2.base + (alignment - offset);
+ new_r2_size = r2.size - (alignment - offset);
+
+ reset_memblock_regions();
+ memblock_add(r1.base, r1.size);
+ memblock_add(r2.base, r2.size);
+ memblock_trim_memory(alignment);
+
+ ASSERT_EQ(rgn1->base, r1.base);
+ ASSERT_EQ(rgn1->size, r1.size);
+
+ ASSERT_EQ(rgn2->base, new_r2_base);
+ ASSERT_EQ(rgn2->size, new_r2_size);
+
+ ASSERT_EQ(memblock.memory.cnt, 2);
+
+ test_pass_pop();
+
+ return 0;
+}
+
+/*
+ * A test that tries to trim memory when there are two available regions, r1 and
+ * r2. Region r1 is aligned on both ends and region r2 is aligned at the base
+ * and unaligned at the end:
+ *
+ * Unaligned address
+ * |
+ * v
+ * | +-----------------+ +---------------+ |
+ * | | r1 | | r2 | |
+ * +--------+-----------------+--------+---------------+---+
+ * ^ ^ ^ ^ ^ ^
+ * |________|________|________|________|________|
+ * |
+ * Aligned addresses
+ *
+ * Expect that r1 will not be trimmed and r2 will be trimmed at the end.
+ * Expect the counter to not be updated.
+ */
+static int memblock_trim_memory_unaligned_end_check(void)
+{
+ struct memblock_region *rgn1, *rgn2;
+ const phys_addr_t alignment = SMP_CACHE_BYTES;
+ phys_addr_t offset = SZ_2;
+ phys_addr_t new_r2_size;
+
+ rgn1 = &memblock.memory.regions[0];
+ rgn2 = &memblock.memory.regions[1];
+
+ struct region r1 = {
+ .base = alignment,
+ .size = alignment * 2
+ };
+ struct region r2 = {
+ .base = alignment * 4,
+ .size = alignment * 2 - offset
+ };
+
+ PREFIX_PUSH();
+
+ new_r2_size = r2.size - (alignment - offset);
+
+ reset_memblock_regions();
+ memblock_add(r1.base, r1.size);
+ memblock_add(r2.base, r2.size);
+ memblock_trim_memory(alignment);
+
+ ASSERT_EQ(rgn1->base, r1.base);
+ ASSERT_EQ(rgn1->size, r1.size);
+
+ ASSERT_EQ(rgn2->base, r2.base);
+ ASSERT_EQ(rgn2->size, new_r2_size);
+
+ ASSERT_EQ(memblock.memory.cnt, 2);
+
+ test_pass_pop();
+
+ return 0;
+}
+
+static int memblock_trim_memory_checks(void)
+{
+ prefix_reset();
+ prefix_push(FUNC_TRIM);
+ test_print("Running %s tests...\n", FUNC_TRIM);
+
+ memblock_trim_memory_aligned_check();
+ memblock_trim_memory_too_small_check();
+ memblock_trim_memory_unaligned_base_check();
+ memblock_trim_memory_unaligned_end_check();
+
+ prefix_pop();
+
+ return 0;
+}
+
int memblock_basic_checks(void)
{
memblock_initialization_check();
@@ -1731,6 +1953,7 @@ int memblock_basic_checks(void)
memblock_remove_checks();
memblock_free_checks();
memblock_bottom_up_checks();
+ memblock_trim_memory_checks();
return 0;
}