Memblock is a boot time memory allocator, which allows managing memory regions before the actual memory management is initialized. Because it is used so early during the booting process, testing and debugging it is difficult. As memblock has few kernel dependencies, it is possible to simulate its runtime behaviour in userspace after stubbing a couple of structs and functions. This series of patches adds an initial version of a test suite for memblock, which is a part of tools/testing infrastructure. Checks included here test the basic functionality of memblock, which is memory regions management - adding/removing available regions, marking them as reserved or freeing them. To run the tests, build the main target and run it: $ make; ./main A successful run produces no output. Also, It is possible to override different configuration parameters. For example, to simulate enabled NUMA, use: $ make NUMA=1 For the full list of options, see `make help`. The future work will include tests for memory allocation done via memblock_alloc_* and memblock_phys_alloc_* family of functions. It will also focus on improving the test suite by adding dedicated test targets for each group of API functions and verbose output. For a refresher on memblock, see Boot time memory management documentation page[1] and "Getting to know memblock"[2] blog post. Patchset structure: * Patch 1 extracts stub definitions of kmalloc/kfree from the radix-tree testing suite, so they can be used in other tests, including memblock simulator * Patches 2-4 update tools headers to include missing definitions needed by memblock (e.g. phys_addr_t typedef) * Patches 5-9 add new files to tools/include, some with dummy/downsized definitions * Patch 10 adds the basic project with local stubs that are closely connected to memblock * Patch 11 adds a reset function, which is used as a part of the test setup. This functionality is needed, as memblock is reused in each check * Patches 12-16 add basic test cases for the core memblock functionalities [1] - https://www.kernel.org/doc/html/latest/core-api/boot-time-mm.html [2] - https://insecuremode.com/post/2021/12/14/getting-to-know-memblock.html Karolina Drobnik (16): tools: Move gfp.h and slab.h from radix-tree to lib tools/include: Add phys_addr_t to types.h tools/include: Add _RET_IP_ and math definitions to kernel.h tools/include: Update atomic.h header tools/include: Add mm.h file tools/include: Add cache.h stub tools/include: Add io.h stub tools/include: Add pfn.h stub tools/include: Add debugfs.h stub memblock tests: Add skeleton of the memblock simulator memblock tests: Add memblock reset function memblock tests: Add memblock_add tests memblock tests: Add memblock_reserve tests memblock tests: Add memblock_remove tests memblock tests: Add memblock_add_node test memblock tests: Add memblock_free tests MAINTAINERS | 1 + tools/include/linux/atomic.h | 4 + tools/include/linux/cache.h | 10 + tools/include/linux/debugfs.h | 5 + tools/include/linux/gfp.h | 28 + tools/include/linux/io.h | 5 + tools/include/linux/kernel.h | 6 + tools/include/linux/mm.h | 42 + tools/include/linux/pfn.h | 10 + .../radix-tree => include}/linux/slab.h | 25 +- tools/include/linux/types.h | 6 + tools/lib/slab.c | 38 + tools/testing/memblock/.gitignore | 6 + tools/testing/memblock/Makefile | 53 ++ tools/testing/memblock/asm/dma.h | 5 + tools/testing/memblock/internal.h | 12 + tools/testing/memblock/lib/slab.c | 9 + tools/testing/memblock/linux/init.h | 34 + tools/testing/memblock/linux/kernel.h | 12 + tools/testing/memblock/linux/kmemleak.h | 18 + tools/testing/memblock/linux/memory_hotplug.h | 19 + tools/testing/memblock/linux/mmzone.h | 35 + tools/testing/memblock/linux/printk.h | 25 + tools/testing/memblock/main.c | 8 + tools/testing/memblock/mmzone.c | 20 + .../testing/memblock/scripts/Makefile.include | 17 + tools/testing/memblock/tests/basic_api.c | 896 ++++++++++++++++++ tools/testing/memblock/tests/basic_api.h | 10 + tools/testing/memblock/tests/common.c | 27 + tools/testing/memblock/tests/common.h | 15 + tools/testing/radix-tree/Makefile | 3 +- tools/testing/radix-tree/linux.c | 27 - tools/testing/radix-tree/linux/gfp.h | 33 - 33 files changed, 1396 insertions(+), 68 deletions(-) create mode 100644 tools/include/linux/cache.h create mode 100644 tools/include/linux/debugfs.h create mode 100644 tools/include/linux/io.h create mode 100644 tools/include/linux/mm.h create mode 100644 tools/include/linux/pfn.h rename tools/{testing/radix-tree => include}/linux/slab.h (61%) create mode 100644 tools/lib/slab.c create mode 100644 tools/testing/memblock/.gitignore create mode 100644 tools/testing/memblock/Makefile create mode 100644 tools/testing/memblock/asm/dma.h create mode 100644 tools/testing/memblock/internal.h create mode 100644 tools/testing/memblock/lib/slab.c create mode 100644 tools/testing/memblock/linux/init.h create mode 100644 tools/testing/memblock/linux/kernel.h create mode 100644 tools/testing/memblock/linux/kmemleak.h create mode 100644 tools/testing/memblock/linux/memory_hotplug.h create mode 100644 tools/testing/memblock/linux/mmzone.h create mode 100644 tools/testing/memblock/linux/printk.h create mode 100644 tools/testing/memblock/main.c create mode 100644 tools/testing/memblock/mmzone.c create mode 100644 tools/testing/memblock/scripts/Makefile.include create mode 100644 tools/testing/memblock/tests/basic_api.c create mode 100644 tools/testing/memblock/tests/basic_api.h create mode 100644 tools/testing/memblock/tests/common.c create mode 100644 tools/testing/memblock/tests/common.h delete mode 100644 tools/testing/radix-tree/linux/gfp.h -- 2.30.2
