--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "alloc_nid_api.h"
+
+/*
+ * A simple test that tries to allocate a memory region within min_addr and
+ * max_addr range:
+ *
+ * + +
+ * | + +-----------+ |
+ * | | | rgn | |
+ * +----+-------+-----------+------+
+ * ^ ^
+ * | |
+ * min_addr max_addr
+ *
+ * Expect to allocate a cleared region that ends at max_addr.
+ */
+static int alloc_try_nid_top_down_simple_check(void)
+{
+ struct memblock_region *rgn = &memblock.reserved.regions[0];
+ void *allocated_ptr = NULL;
+ char *b;
+
+ phys_addr_t size = SZ_128;
+ phys_addr_t min_addr;
+ phys_addr_t max_addr;
+ phys_addr_t rgn_end;
+
+ setup_memblock();
+
+ min_addr = memblock_start_of_DRAM() + SMP_CACHE_BYTES * 2;
+ max_addr = min_addr + SZ_512;
+
+ allocated_ptr = memblock_alloc_try_nid(size, SMP_CACHE_BYTES,
+ min_addr, max_addr, NUMA_NO_NODE);
+ b = (char *)allocated_ptr;
+ rgn_end = rgn->base + rgn->size;
+
+ assert(allocated_ptr);
+ assert(*b == 0);
+
+ assert(rgn->size == size);
+ assert(rgn->base == max_addr - size);
+ assert(rgn_end == max_addr);
+
+ assert(memblock.reserved.cnt == 1);
+ assert(memblock.reserved.total_size == size);
+
+ return 0;
+}
+
+/*
+ * A simple test that tries to allocate a memory region within min_addr and
+ * max_addr range, where the end address is misaligned:
+ *
+ * + + +
+ * | + +---------+ + |
+ * | | | rgn | | |
+ * +------+-------+---------+--+----+
+ * ^ ^ ^
+ * | | |
+ * min_add | max_addr
+ * |
+ * Aligned address
+ * boundary
+ *
+ * Expect to allocate a cleared, aligned region that ends before max_addr.
+ */
+static int alloc_try_nid_top_down_end_misaligned_check(void)
+{
+ struct memblock_region *rgn = &memblock.reserved.regions[0];
+ void *allocated_ptr = NULL;
+ char *b;
+
+ phys_addr_t size = SZ_128;
+ phys_addr_t misalign = SZ_2;
+ phys_addr_t min_addr;
+ phys_addr_t max_addr;
+ phys_addr_t rgn_end;
+
+ setup_memblock();
+
+ min_addr = memblock_start_of_DRAM() + SMP_CACHE_BYTES * 2;
+ max_addr = min_addr + SZ_512 + misalign;
+
+ allocated_ptr = memblock_alloc_try_nid(size, SMP_CACHE_BYTES,
+ min_addr, max_addr, NUMA_NO_NODE);
+ b = (char *)allocated_ptr;
+ rgn_end = rgn->base + rgn->size;
+
+ assert(allocated_ptr);
+ assert(*b == 0);
+
+ assert(rgn->size == size);
+ assert(rgn->base == max_addr - size - misalign);
+ assert(rgn_end < max_addr);
+
+ assert(memblock.reserved.cnt == 1);
+ assert(memblock.reserved.total_size == size);
+
+ return 0;
+}
+
+/*
+ * A simple test that tries to allocate a memory region, which spans over the
+ * min_addr and max_addr range:
+ *
+ * + +
+ * | +---------------+ |
+ * | | rgn | |
+ * +------+---------------+-------+
+ * ^ ^
+ * | |
+ * min_addr max_addr
+ *
+ * Expect to allocate a cleared region that starts at min_addr and ends at
+ * max_addr, given that min_addr is aligned.
+ */
+static int alloc_try_nid_exact_address_generic_check(void)
+{
+ struct memblock_region *rgn = &memblock.reserved.regions[0];
+ void *allocated_ptr = NULL;
+ char *b;
+
+ phys_addr_t size = SZ_1K;
+ phys_addr_t min_addr;
+ phys_addr_t max_addr;
+ phys_addr_t rgn_end;
+
+ setup_memblock();
+
+ min_addr = memblock_start_of_DRAM() + SMP_CACHE_BYTES;
+ max_addr = min_addr + size;
+
+ allocated_ptr = memblock_alloc_try_nid(size, SMP_CACHE_BYTES,
+ min_addr, max_addr, NUMA_NO_NODE);
+ b = (char *)allocated_ptr;
+ rgn_end = rgn->base + rgn->size;
+
+ assert(allocated_ptr);
+ assert(*b == 0);
+
+ assert(rgn->size == size);
+ assert(rgn->base == min_addr);
+ assert(rgn_end == max_addr);
+
+ assert(memblock.reserved.cnt == 1);
+ assert(memblock.reserved.total_size == size);
+
+ return 0;
+}
+
+/*
+ * A test that tries to allocate a memory region, which can't fit into
+ * min_addr and max_addr range:
+ *
+ * + + +
+ * | +----------+-----+ |
+ * | | rgn + | |
+ * +--------+----------+-----+----+
+ * ^ ^ ^
+ * | | |
+ * Aligned | max_addr
+ * address |
+ * boundary min_add
+ *
+ * Expect to drop the lower limit and allocate a cleared memory region which
+ * ends at max_addr (if the address is aligned).
+ */
+static int alloc_try_nid_top_down_narrow_range_check(void)
+{
+ struct memblock_region *rgn = &memblock.reserved.regions[0];
+ void *allocated_ptr = NULL;
+ char *b;
+
+ phys_addr_t size = SZ_256;
+ phys_addr_t min_addr;
+ phys_addr_t max_addr;
+
+ setup_memblock();
+
+ min_addr = memblock_start_of_DRAM() + SZ_512;
+ max_addr = min_addr + SMP_CACHE_BYTES;
+
+ allocated_ptr = memblock_alloc_try_nid(size, SMP_CACHE_BYTES,
+ min_addr, max_addr, NUMA_NO_NODE);
+ b = (char *)allocated_ptr;
+
+ assert(allocated_ptr);
+ assert(*b == 0);
+
+ assert(rgn->size == size);
+ assert(rgn->base == max_addr - size);
+
+ assert(memblock.reserved.cnt == 1);
+ assert(memblock.reserved.total_size == size);
+
+ return 0;
+}
+
+/*
+ * A test that tries to allocate a memory region, which can't fit into
+ * min_addr and max_addr range, with the latter being too close to the beginning
+ * of the available memory:
+ *
+ * +-------------+
+ * | new |
+ * +-------------+
+ * + +
+ * | + |
+ * | | |
+ * +-------+--------------+
+ * ^ ^
+ * | |
+ * | max_addr
+ * |
+ * min_addr
+ *
+ * Expect no allocation to happen.
+ */
+static int alloc_try_nid_low_max_generic_check(void)
+{
+ void *allocated_ptr = NULL;
+
+ phys_addr_t size = SZ_1K;
+ phys_addr_t min_addr;
+ phys_addr_t max_addr;
+
+ setup_memblock();
+
+ min_addr = memblock_start_of_DRAM();
+ max_addr = min_addr + SMP_CACHE_BYTES;
+
+ allocated_ptr = memblock_alloc_try_nid(size, SMP_CACHE_BYTES,
+ min_addr, max_addr, NUMA_NO_NODE);
+
+ assert(!allocated_ptr);
+
+ return 0;
+}
+
+/*
+ * A test that tries to allocate a memory region within min_addr min_addr range,
+ * with min_addr being so close that it's next to an allocated region:
+ *
+ * + +
+ * | +--------+---------------|
+ * | | r1 | rgn |
+ * +-------+--------+---------------+
+ * ^ ^
+ * | |
+ * min_addr max_addr
+ *
+ * Expect a merge of both regions. Only the region size gets updated.
+ */
+static int alloc_try_nid_min_reserved_generic_check(void)
+{
+ struct memblock_region *rgn = &memblock.reserved.regions[0];
+ void *allocated_ptr = NULL;
+ char *b;
+
+ phys_addr_t r1_size = SZ_128;
+ phys_addr_t r2_size = SZ_64;
+ phys_addr_t total_size = r1_size + r2_size;
+ phys_addr_t min_addr;
+ phys_addr_t max_addr;
+ phys_addr_t reserved_base;
+
+ setup_memblock();
+
+ max_addr = memblock_end_of_DRAM();
+ min_addr = max_addr - r2_size;
+ reserved_base = min_addr - r1_size;
+
+ memblock_reserve(reserved_base, r1_size);
+
+ allocated_ptr = memblock_alloc_try_nid(r2_size, SMP_CACHE_BYTES,
+ min_addr, max_addr, NUMA_NO_NODE);
+ b = (char *)allocated_ptr;
+
+ assert(allocated_ptr);
+ assert(*b == 0);
+
+ assert(rgn->size == total_size);
+ assert(rgn->base == reserved_base);
+
+ assert(memblock.reserved.cnt == 1);
+ assert(memblock.reserved.total_size == total_size);
+
+ return 0;
+}
+
+/*
+ * A test that tries to allocate a memory region within min_addr and max_addr,
+ * with max_addr being so close that it's next to an allocated region:
+ *
+ * + +
+ * | +-------------+--------|
+ * | | rgn | r1 |
+ * +----------+-------------+--------+
+ * ^ ^
+ * | |
+ * min_addr max_addr
+ *
+ * Expect a merge of regions. Only the region size gets updated.
+ */
+static int alloc_try_nid_max_reserved_generic_check(void)
+{
+ struct memblock_region *rgn = &memblock.reserved.regions[0];
+ void *allocated_ptr = NULL;
+ char *b;
+
+ phys_addr_t r1_size = SZ_64;
+ phys_addr_t r2_size = SZ_128;
+ phys_addr_t total_size = r1_size + r2_size;
+ phys_addr_t min_addr;
+ phys_addr_t max_addr;
+
+ setup_memblock();
+
+ max_addr = memblock_end_of_DRAM() - r1_size;
+ min_addr = max_addr - r2_size;
+
+ memblock_reserve(max_addr, r1_size);
+
+ allocated_ptr = memblock_alloc_try_nid(r2_size, SMP_CACHE_BYTES,
+ min_addr, max_addr, NUMA_NO_NODE);
+ b = (char *)allocated_ptr;
+
+ assert(allocated_ptr);
+ assert(*b == 0);
+
+ assert(rgn->size == total_size);
+ assert(rgn->base == min_addr);
+
+ assert(memblock.reserved.cnt == 1);
+ assert(memblock.reserved.total_size == total_size);
+
+ return 0;
+}
+
+/*
+ * A test that tries to allocate memory within min_addr and max_add range, when
+ * there are two reserved regions at the borders, with a gap big enough to fit
+ * a new region:
+ *
+ * + +
+ * | +--------+ +-------+------+ |
+ * | | r2 | | rgn | r1 | |
+ * +----+--------+---+-------+------+--+
+ * ^ ^
+ * | |
+ * min_addr max_addr
+ *
+ * Expect to merge the new region with r1. The second region does not get
+ * updated. The total size field gets updated.
+ */
+
+static int alloc_try_nid_top_down_reserved_with_space_check(void)
+{
+ struct memblock_region *rgn1 = &memblock.reserved.regions[1];
+ struct memblock_region *rgn2 = &memblock.reserved.regions[0];
+ void *allocated_ptr = NULL;
+ char *b;
+ struct region r1, r2;
+
+ phys_addr_t r3_size = SZ_64;
+ phys_addr_t gap_size = SMP_CACHE_BYTES;
+ phys_addr_t total_size;
+ phys_addr_t max_addr;
+ phys_addr_t min_addr;
+
+ setup_memblock();
+
+ r1.base = memblock_end_of_DRAM() - SMP_CACHE_BYTES * 2;
+ r1.size = SMP_CACHE_BYTES;
+
+ r2.size = SZ_128;
+ r2.base = r1.base - (r3_size + gap_size + r2.size);
+
+ total_size = r1.size + r2.size + r3_size;
+ min_addr = r2.base + r2.size;
+ max_addr = r1.base;
+
+ memblock_reserve(r1.base, r1.size);
+ memblock_reserve(r2.base, r2.size);
+
+ allocated_ptr = memblock_alloc_try_nid(r3_size, SMP_CACHE_BYTES,
+ min_addr, max_addr, NUMA_NO_NODE);
+ b = (char *)allocated_ptr;
+
+ assert(allocated_ptr);
+ assert(*b == 0);
+
+ assert(rgn1->size == r1.size + r3_size);
+ assert(rgn1->base == max_addr - r3_size);
+
+ assert(rgn2->size == r2.size);
+ assert(rgn2->base == r2.base);
+
+ assert(memblock.reserved.cnt == 2);
+ assert(memblock.reserved.total_size == total_size);
+
+ return 0;
+}
+
+/*
+ * A test that tries to allocate memory within min_addr and max_add range, when
+ * there are two reserved regions at the borders, with a gap of a size equal to
+ * the size of the new region:
+ *
+ * + +
+ * | +--------+--------+--------+ |
+ * | | r2 | r3 | r1 | |
+ * +-----+--------+--------+--------+-----+
+ * ^ ^
+ * | |
+ * min_addr max_addr
+ *
+ * Expect to merge all of the regions into one. The region counter and total
+ * size fields get updated.
+ */
+static int alloc_try_nid_reserved_full_merge_generic_check(void)
+{
+ struct memblock_region *rgn = &memblock.reserved.regions[0];
+ void *allocated_ptr = NULL;
+ char *b;
+ struct region r1, r2;
+
+ phys_addr_t r3_size = SZ_64;
+ phys_addr_t total_size;
+ phys_addr_t max_addr;
+ phys_addr_t min_addr;
+
+ setup_memblock();
+
+ r1.base = memblock_end_of_DRAM() - SMP_CACHE_BYTES * 2;
+ r1.size = SMP_CACHE_BYTES;
+
+ r2.size = SZ_128;
+ r2.base = r1.base - (r3_size + r2.size);
+
+ total_size = r1.size + r2.size + r3_size;
+ min_addr = r2.base + r2.size;
+ max_addr = r1.base;
+
+ memblock_reserve(r1.base, r1.size);
+ memblock_reserve(r2.base, r2.size);
+
+ allocated_ptr = memblock_alloc_try_nid(r3_size, SMP_CACHE_BYTES,
+ min_addr, max_addr, NUMA_NO_NODE);
+ b = (char *)allocated_ptr;
+
+ assert(allocated_ptr);
+ assert(*b == 0);
+
+ assert(rgn->size == total_size);
+ assert(rgn->base == r2.base);
+
+ assert(memblock.reserved.cnt == 1);
+ assert(memblock.reserved.total_size == total_size);
+
+ return 0;
+}
+
+/*
+ * A test that tries to allocate memory within min_addr and max_add range, when
+ * there are two reserved regions at the borders, with a gap that can't fit
+ * a new region:
+ *
+ * + +
+ * | +----------+------+ +------+ |
+ * | | r3 | r2 | | r1 | |
+ * +--+----------+------+----+------+---+
+ * ^ ^
+ * | |
+ * | max_addr
+ * |
+ * min_addr
+ *
+ * Expect to merge the new region with r2. The second region does not get
+ * updated. The total size counter gets updated.
+ */
+static int alloc_try_nid_top_down_reserved_no_space_check(void)
+{
+ struct memblock_region *rgn1 = &memblock.reserved.regions[1];
+ struct memblock_region *rgn2 = &memblock.reserved.regions[0];
+ void *allocated_ptr = NULL;
+ char *b;
+ struct region r1, r2;
+
+ phys_addr_t r3_size = SZ_256;
+ phys_addr_t gap_size = SMP_CACHE_BYTES;
+ phys_addr_t total_size;
+ phys_addr_t max_addr;
+ phys_addr_t min_addr;
+
+ setup_memblock();
+
+ r1.base = memblock_end_of_DRAM() - SMP_CACHE_BYTES * 2;
+ r1.size = SMP_CACHE_BYTES;
+
+ r2.size = SZ_128;
+ r2.base = r1.base - (r2.size + gap_size);
+
+ total_size = r1.size + r2.size + r3_size;
+ min_addr = r2.base + r2.size;
+ max_addr = r1.base;
+
+ memblock_reserve(r1.base, r1.size);
+ memblock_reserve(r2.base, r2.size);
+
+ allocated_ptr = memblock_alloc_try_nid(r3_size, SMP_CACHE_BYTES,
+ min_addr, max_addr, NUMA_NO_NODE);
+ b = (char *)allocated_ptr;
+
+ assert(allocated_ptr);
+ assert(*b == 0);
+
+ assert(rgn1->size == r1.size);
+ assert(rgn1->base == r1.base);
+
+ assert(rgn2->size == r2.size + r3_size);
+ assert(rgn2->base == r2.base - r3_size);
+
+ assert(memblock.reserved.cnt == 2);
+ assert(memblock.reserved.total_size == total_size);
+
+ return 0;
+}
+
+/*
+ * A test that tries to allocate memory within min_addr and max_add range, but
+ * it's too narrow and everything else is reserved:
+ *
+ * +-----------+
+ * | new |
+ * +-----------+
+ * + +
+ * |--------------+ +----------|
+ * | r2 | | r1 |
+ * +--------------+------+----------+
+ * ^ ^
+ * | |
+ * | max_addr
+ * |
+ * min_addr
+ *
+ * Expect no allocation to happen.
+ */
+
+static int alloc_try_nid_reserved_all_generic_check(void)
+{
+ void *allocated_ptr = NULL;
+ struct region r1, r2;
+
+ phys_addr_t r3_size = SZ_256;
+ phys_addr_t gap_size = SMP_CACHE_BYTES;
+ phys_addr_t max_addr;
+ phys_addr_t min_addr;
+
+ setup_memblock();
+
+ r1.base = memblock_end_of_DRAM() - SMP_CACHE_BYTES;
+ r1.size = SMP_CACHE_BYTES;
+
+ r2.size = MEM_SIZE - (r1.size + gap_size);
+ r2.base = memblock_start_of_DRAM();
+
+ min_addr = r2.base + r2.size;
+ max_addr = r1.base;
+
+ memblock_reserve(r1.base, r1.size);
+ memblock_reserve(r2.base, r2.size);
+
+ allocated_ptr = memblock_alloc_try_nid(r3_size, SMP_CACHE_BYTES,
+ min_addr, max_addr, NUMA_NO_NODE);
+
+ assert(!allocated_ptr);
+
+ return 0;
+}
+
+/*
+ * A test that tries to allocate a memory region, where max_addr is
+ * bigger than the end address of the available memory. Expect to allocate
+ * a cleared region that ends before the end of the memory.
+ */
+static int alloc_try_nid_top_down_cap_max_check(void)
+{
+ struct memblock_region *rgn = &memblock.reserved.regions[0];
+ void *allocated_ptr = NULL;
+ char *b;
+
+ phys_addr_t size = SZ_256;
+ phys_addr_t min_addr;
+ phys_addr_t max_addr;
+
+ setup_memblock();
+
+ min_addr = memblock_end_of_DRAM() - SZ_1K;
+ max_addr = memblock_end_of_DRAM() + SZ_256;
+
+ allocated_ptr = memblock_alloc_try_nid(size, SMP_CACHE_BYTES,
+ min_addr, max_addr, NUMA_NO_NODE);
+ b = (char *)allocated_ptr;
+
+ assert(allocated_ptr);
+ assert(*b == 0);
+
+ assert(rgn->size == size);
+ assert(rgn->base == memblock_end_of_DRAM() - size);
+
+ assert(memblock.reserved.cnt == 1);
+ assert(memblock.reserved.total_size == size);
+
+ return 0;
+}
+
+/*
+ * A test that tries to allocate a memory region, where min_addr is
+ * smaller than the start address of the available memory. Expect to allocate
+ * a cleared region that ends before the end of the memory.
+ */
+static int alloc_try_nid_top_down_cap_min_check(void)
+{
+ struct memblock_region *rgn = &memblock.reserved.regions[0];
+ void *allocated_ptr = NULL;
+ char *b;
+
+ phys_addr_t size = SZ_1K;
+ phys_addr_t min_addr;
+ phys_addr_t max_addr;
+
+ setup_memblock();
+
+ min_addr = memblock_start_of_DRAM() - SZ_256;
+ max_addr = memblock_end_of_DRAM();
+
+ allocated_ptr = memblock_alloc_try_nid(size, SMP_CACHE_BYTES,
+ min_addr, max_addr, NUMA_NO_NODE);
+ b = (char *)allocated_ptr;
+
+ assert(allocated_ptr);
+ assert(*b == 0);
+
+ assert(rgn->size == size);
+ assert(rgn->base == memblock_end_of_DRAM() - size);
+
+ assert(memblock.reserved.cnt == 1);
+ assert(memblock.reserved.total_size == size);
+
+ return 0;
+}
+
+int memblock_alloc_nid_checks(void)
+{
+ reset_memblock_attributes();
+ dummy_physical_memory_init();
+
+ alloc_try_nid_top_down_simple_check();
+ alloc_try_nid_top_down_end_misaligned_check();
+ alloc_try_nid_top_down_narrow_range_check();
+ alloc_try_nid_top_down_reserved_with_space_check();
+ alloc_try_nid_top_down_reserved_no_space_check();
+ alloc_try_nid_top_down_cap_min_check();
+ alloc_try_nid_top_down_cap_max_check();
+
+ alloc_try_nid_min_reserved_generic_check();
+ alloc_try_nid_max_reserved_generic_check();
+ alloc_try_nid_exact_address_generic_check();
+ alloc_try_nid_reserved_full_merge_generic_check();
+ alloc_try_nid_reserved_all_generic_check();
+ alloc_try_nid_low_max_generic_check();
+
+ dummy_physical_memory_cleanup();
+
+ return 0;
+}
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