diff options
Diffstat (limited to 'tools/testing/memblock')
26 files changed, 3755 insertions, 0 deletions
diff --git a/tools/testing/memblock/.gitignore b/tools/testing/memblock/.gitignore new file mode 100644 index 000000000000..654338e0be52 --- /dev/null +++ b/tools/testing/memblock/.gitignore @@ -0,0 +1,4 @@ +main +memblock.c +linux/memblock.h +asm/cmpxchg.h diff --git a/tools/testing/memblock/Makefile b/tools/testing/memblock/Makefile new file mode 100644 index 000000000000..a698e24b35e7 --- /dev/null +++ b/tools/testing/memblock/Makefile @@ -0,0 +1,55 @@ +# SPDX-License-Identifier: GPL-2.0 + +# Memblock simulator requires AddressSanitizer (libasan) and liburcu development +# packages installed +CFLAGS += -I. -I../../include -Wall -O2 -fsanitize=address \ + -fsanitize=undefined -D CONFIG_PHYS_ADDR_T_64BIT +LDFLAGS += -fsanitize=address -fsanitize=undefined +TARGETS = main +TEST_OFILES = tests/alloc_nid_api.o tests/alloc_helpers_api.o tests/alloc_api.o \ + tests/basic_api.o tests/common.o +DEP_OFILES = memblock.o lib/slab.o mmzone.o slab.o +OFILES = main.o $(DEP_OFILES) $(TEST_OFILES) +EXTR_SRC = ../../../mm/memblock.c + +ifeq ($(BUILD), 32) + CFLAGS += -m32 + LDFLAGS += -m32 +endif + +# Process user parameters +include scripts/Makefile.include + +main: $(OFILES) + +$(OFILES): include + +include: ../../../include/linux/memblock.h ../../include/linux/*.h \ + ../../include/asm/*.h + + @mkdir -p linux + test -L linux/memblock.h || ln -s ../../../../include/linux/memblock.h linux/memblock.h + test -L asm/cmpxchg.h || ln -s ../../../arch/x86/include/asm/cmpxchg.h asm/cmpxchg.h + +memblock.c: $(EXTR_SRC) + test -L memblock.c || ln -s $(EXTR_SRC) memblock.c + +clean: + $(RM) $(TARGETS) $(OFILES) linux/memblock.h memblock.c asm/cmpxchg.h + +help: + @echo 'Memblock simulator' + @echo '' + @echo 'Available targets:' + @echo ' main - Build the memblock simulator' + @echo ' clean - Remove generated files and symlinks in the directory' + @echo '' + @echo 'Configuration:' + @echo ' make NUMA=1 - simulate enabled NUMA' + @echo ' make MOVABLE_NODE=1 - override `movable_node_is_enabled`' + @echo ' definition to simulate movable NUMA nodes' + @echo ' make 32BIT_PHYS_ADDR_T=1 - Use 32 bit physical addresses' + +vpath %.c ../../lib + +.PHONY: clean include help diff --git a/tools/testing/memblock/README b/tools/testing/memblock/README new file mode 100644 index 000000000000..ca6afcff013a --- /dev/null +++ b/tools/testing/memblock/README @@ -0,0 +1,107 @@ +================== +Memblock simulator +================== + +Introduction +============ + +Memblock is a boot time memory allocator[1] that manages memory regions before +the actual memory management is initialized. Its APIs allow to register physical +memory regions, mark them as available or reserved, allocate a block of memory +within the requested range and/or in specific NUMA node, and many more. + +Because it is used so early in the booting process, testing and debugging it is +difficult. This test suite, usually referred as memblock simulator, is +an attempt at testing the memblock mechanism. It runs one monolithic test that +consist of a series of checks that exercise both the basic operations and +allocation functionalities of memblock. The main data structure of the boot time +memory allocator is initialized at the build time, so the checks here reuse its +instance throughout the duration of the test. To ensure that tests don't affect +each other, region arrays are reset in between. + +As this project uses the actual memblock code and has to run in user space, +some of the kernel definitions were stubbed by the initial commit that +introduced memblock simulator (commit 16802e55dea9 ("memblock tests: Add +skeleton of the memblock simulator")) and a few preparation commits just +before it. Most of them don't match the kernel implementation, so one should +consult them first before making any significant changes to the project. + +Usage +===== + +To run the tests, build the main target and run it: + +$ make && ./main + +A successful run produces no output. It is also 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`. + +Project structure +================= + +The project has one target, main, which calls a group of checks for basic and +allocation functions. Tests for each group are defined in dedicated files, as it +can be seen here: + +memblock +|-- asm ------------------, +|-- lib |-- implement function and struct stubs +|-- linux ------------------' +|-- scripts +| |-- Makefile.include -- handles `make` parameters +|-- tests +| |-- alloc_api.(c|h) -- memblock_alloc tests +| |-- alloc_helpers_api.(c|h) -- memblock_alloc_from tests +| |-- alloc_nid_api.(c|h) -- memblock_alloc_try_nid tests +| |-- basic_api.(c|h) -- memblock_add/memblock_reserve/... tests +| |-- common.(c|h) -- helper functions for resetting memblock; +|-- main.c --------------. dummy physical memory definition +|-- Makefile `- test runner +|-- README +|-- TODO +|-- .gitignore + +Simulating physical memory +========================== + +Some allocation functions clear the memory in the process, so it is required for +memblock to track valid memory ranges. To achieve this, the test suite registers +with memblock memory stored by test_memory struct. It is a small wrapper that +points to a block of memory allocated via malloc. For each group of allocation +tests, dummy physical memory is allocated, added to memblock, and then released +at the end of the test run. The structure of a test runner checking allocation +functions is as follows: + +int memblock_alloc_foo_checks(void) +{ + reset_memblock_attributes(); /* data structure reset */ + dummy_physical_memory_init(); /* allocate and register memory */ + + (...allocation checks...) + + dummy_physical_memory_cleanup(); /* free the memory */ +} + +There's no need to explicitly free the dummy memory from memblock via +memblock_free() call. The entry will be erased by reset_memblock_regions(), +called at the beginning of each test. + +Known issues +============ + +1. Requesting a specific NUMA node via memblock_alloc_node() does not work as + intended. Once the fix is in place, tests for this function can be added. + +2. Tests for memblock_alloc_low() can't be easily implemented. The function uses + ARCH_LOW_ADDRESS_LIMIT marco, which can't be changed to point at the low + memory of the memory_block. + +References +========== + +1. Boot time memory management documentation page: + https://www.kernel.org/doc/html/latest/core-api/boot-time-mm.html diff --git a/tools/testing/memblock/TODO b/tools/testing/memblock/TODO new file mode 100644 index 000000000000..c25b2fdec45e --- /dev/null +++ b/tools/testing/memblock/TODO @@ -0,0 +1,28 @@ +TODO +===== + +1. Add verbose output (e.g., what is being tested and how many tests cases are + passing) + +2. Add flags to Makefile: + + verbosity level + + enable memblock_dbg() messages (i.e. pass "-D CONFIG_DEBUG_MEMORY_INIT" + flag) + +3. Add tests trying to memblock_add() or memblock_reserve() 129th region. + This will trigger memblock_double_array(), make sure it succeeds. + *Important:* These tests require valid memory ranges, use dummy physical + memory block from common.c to implement them. It is also very + likely that the current MEM_SIZE won't be enough for these + test cases. Use realloc to adjust the size accordingly. + +4. Add test cases using this functions (implement them for both directions): + + memblock_alloc_raw() + + memblock_alloc_exact_nid_raw() + + memblock_alloc_try_nid_raw() + +5. Add tests for memblock_alloc_node() to check if the correct NUMA node is set + for the new region + +6. Update comments in tests/basic_api.c to match the style used in + tests/alloc_*.c diff --git a/tools/testing/memblock/asm/dma.h b/tools/testing/memblock/asm/dma.h new file mode 100644 index 000000000000..13ff8e5d22ef --- /dev/null +++ b/tools/testing/memblock/asm/dma.h @@ -0,0 +1,5 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _TOOLS_DMA_H +#define _TOOLS_DMA_H + +#endif diff --git a/tools/testing/memblock/internal.h b/tools/testing/memblock/internal.h new file mode 100644 index 000000000000..94b52a8718b5 --- /dev/null +++ b/tools/testing/memblock/internal.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef _MM_INTERNAL_H +#define _MM_INTERNAL_H + +struct page {}; + +void memblock_free_pages(struct page *page, unsigned long pfn, + unsigned int order) +{ +} + +#endif diff --git a/tools/testing/memblock/lib/slab.c b/tools/testing/memblock/lib/slab.c new file mode 100644 index 000000000000..6be6020328fb --- /dev/null +++ b/tools/testing/memblock/lib/slab.c @@ -0,0 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/slab.h> + +enum slab_state slab_state; + +bool slab_is_available(void) +{ + return slab_state >= UP; +} diff --git a/tools/testing/memblock/linux/init.h b/tools/testing/memblock/linux/init.h new file mode 100644 index 000000000000..828e0ee0bc6c --- /dev/null +++ b/tools/testing/memblock/linux/init.h @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_INIT_H +#define _LINUX_INIT_H + +#include <linux/compiler.h> +#include <asm/export.h> +#include <linux/memory_hotplug.h> + +#define __section(section) __attribute__((__section__(section))) + +#define __initconst +#define __meminit +#define __meminitdata +#define __refdata +#define __initdata + +struct obs_kernel_param { + const char *str; + int (*setup_func)(char *st); + int early; +}; + +#define __setup_param(str, unique_id, fn, early) \ + static const char __setup_str_##unique_id[] __initconst \ + __aligned(1) = str; \ + static struct obs_kernel_param __setup_##unique_id \ + __used __section(".init.setup") \ + __aligned(__alignof__(struct obs_kernel_param)) = \ + { __setup_str_##unique_id, fn, early } + +#define early_param(str, fn) \ + __setup_param(str, fn, fn, 1) + +#endif diff --git a/tools/testing/memblock/linux/kernel.h b/tools/testing/memblock/linux/kernel.h new file mode 100644 index 000000000000..d2f148bd8902 --- /dev/null +++ b/tools/testing/memblock/linux/kernel.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef _MEMBLOCK_LINUX_KERNEL_H +#define _MEMBLOCK_LINUX_KERNEL_H + +#include <../../include/linux/kernel.h> +#include <linux/errno.h> +#include <string.h> +#include <linux/printk.h> +#include <linux/linkage.h> +#include <linux/kconfig.h> + +#endif diff --git a/tools/testing/memblock/linux/kmemleak.h b/tools/testing/memblock/linux/kmemleak.h new file mode 100644 index 000000000000..462f8c5e8aa0 --- /dev/null +++ b/tools/testing/memblock/linux/kmemleak.h @@ -0,0 +1,18 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef _KMEMLEAK_H +#define _KMEMLEAK_H + +static inline void kmemleak_free_part_phys(phys_addr_t phys, size_t size) +{ +} + +static inline void kmemleak_alloc_phys(phys_addr_t phys, size_t size, + int min_count, gfp_t gfp) +{ +} + +static inline void dump_stack(void) +{ +} + +#endif diff --git a/tools/testing/memblock/linux/memory_hotplug.h b/tools/testing/memblock/linux/memory_hotplug.h new file mode 100644 index 000000000000..47988765a219 --- /dev/null +++ b/tools/testing/memblock/linux/memory_hotplug.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_MEMORY_HOTPLUG_H +#define _LINUX_MEMORY_HOTPLUG_H + +#include <linux/numa.h> +#include <linux/pfn.h> +#include <linux/cache.h> +#include <linux/types.h> + +static inline bool movable_node_is_enabled(void) +{ +#ifdef MOVABLE_NODE + return true; +#else + return false; +#endif +} + +#endif diff --git a/tools/testing/memblock/linux/mmzone.h b/tools/testing/memblock/linux/mmzone.h new file mode 100644 index 000000000000..7c2eb5c9bb54 --- /dev/null +++ b/tools/testing/memblock/linux/mmzone.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _TOOLS_MMZONE_H +#define _TOOLS_MMZONE_H + +#include <linux/atomic.h> + +struct pglist_data *first_online_pgdat(void); +struct pglist_data *next_online_pgdat(struct pglist_data *pgdat); + +#define for_each_online_pgdat(pgdat) \ + for (pgdat = first_online_pgdat(); \ + pgdat; \ + pgdat = next_online_pgdat(pgdat)) + +enum zone_type { + __MAX_NR_ZONES +}; + +#define MAX_NR_ZONES __MAX_NR_ZONES +#define MAX_ORDER 11 +#define MAX_ORDER_NR_PAGES (1 << (MAX_ORDER - 1)) + +#define pageblock_order (MAX_ORDER - 1) +#define pageblock_nr_pages BIT(pageblock_order) + +struct zone { + atomic_long_t managed_pages; +}; + +typedef struct pglist_data { + struct zone node_zones[MAX_NR_ZONES]; + +} pg_data_t; + +#endif diff --git a/tools/testing/memblock/linux/printk.h b/tools/testing/memblock/linux/printk.h new file mode 100644 index 000000000000..61af424d8c6c --- /dev/null +++ b/tools/testing/memblock/linux/printk.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _PRINTK_H +#define _PRINTK_H + +#include <stdio.h> +#include <asm/bug.h> + +/* + * memblock_dbg is called with u64 arguments that don't match the "%llu" + * specifier in printf. This results in warnings that cannot be fixed without + * modifying memblock.c, which we wish to avoid. As these messaged are not used + * in testing anyway, the mismatch can be ignored. + */ +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wformat" +#define printk printf +#pragma GCC diagnostic push + +#define pr_info printk +#define pr_debug printk +#define pr_cont printk +#define pr_err printk +#define pr_warn printk + +#endif diff --git a/tools/testing/memblock/main.c b/tools/testing/memblock/main.c new file mode 100644 index 000000000000..fb183c9e76d1 --- /dev/null +++ b/tools/testing/memblock/main.c @@ -0,0 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +#include "tests/basic_api.h" +#include "tests/alloc_api.h" +#include "tests/alloc_helpers_api.h" +#include "tests/alloc_nid_api.h" + +int main(int argc, char **argv) +{ + memblock_basic_checks(); + memblock_alloc_checks(); + memblock_alloc_helpers_checks(); + memblock_alloc_nid_checks(); + + return 0; +} diff --git a/tools/testing/memblock/mmzone.c b/tools/testing/memblock/mmzone.c new file mode 100644 index 000000000000..7b0909e8b759 --- /dev/null +++ b/tools/testing/memblock/mmzone.c @@ -0,0 +1,20 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +#include <linux/mmzone.h> + +struct pglist_data *first_online_pgdat(void) +{ + return NULL; +} + +struct pglist_data *next_online_pgdat(struct pglist_data *pgdat) +{ + return NULL; +} + +void reserve_bootmem_region(phys_addr_t start, phys_addr_t end) +{ +} + +void atomic_long_set(atomic_long_t *v, long i) +{ +} diff --git a/tools/testing/memblock/scripts/Makefile.include b/tools/testing/memblock/scripts/Makefile.include new file mode 100644 index 000000000000..641569ccb7b0 --- /dev/null +++ b/tools/testing/memblock/scripts/Makefile.include @@ -0,0 +1,19 @@ +# SPDX-License-Identifier: GPL-2.0 +# Definitions for user-provided arguments + +# Simulate CONFIG_NUMA=y +ifeq ($(NUMA), 1) + CFLAGS += -D CONFIG_NUMA +endif + +# Simulate movable NUMA memory regions +ifeq ($(MOVABLE_NODE), 1) + CFLAGS += -D MOVABLE_NODE +endif + +# Use 32 bit physical addresses. +# Remember to install 32-bit version of dependencies. +ifeq ($(32BIT_PHYS_ADDR_T), 1) + CFLAGS += -m32 -U CONFIG_PHYS_ADDR_T_64BIT + LDFLAGS += -m32 +endif diff --git a/tools/testing/memblock/tests/alloc_api.c b/tools/testing/memblock/tests/alloc_api.c new file mode 100644 index 000000000000..d1aa7e15c18d --- /dev/null +++ b/tools/testing/memblock/tests/alloc_api.c @@ -0,0 +1,750 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +#include "alloc_api.h" + +/* + * A simple test that tries to allocate a small memory region. + * Expect to allocate an aligned region near the end of the available memory. + */ +static int alloc_top_down_simple_check(void) +{ + struct memblock_region *rgn = &memblock.reserved.regions[0]; + void *allocated_ptr = NULL; + + phys_addr_t size = SZ_2; + phys_addr_t expected_start; + + setup_memblock(); + + expected_start = memblock_end_of_DRAM() - SMP_CACHE_BYTES; + + allocated_ptr = memblock_alloc(size, SMP_CACHE_BYTES); + + assert(allocated_ptr); + assert(rgn->size == size); + assert(rgn->base == expected_start); + + assert(memblock.reserved.cnt == 1); + assert(memblock.reserved.total_size == size); + + return 0; +} + +/* + * A test that tries to allocate memory next to a reserved region that starts at + * the misaligned address. Expect to create two separate entries, with the new + * entry aligned to the provided alignment: + * + * + + * | +--------+ +--------| + * | | rgn2 | | rgn1 | + * +------------+--------+---------+--------+ + * ^ + * | + * Aligned address boundary + * + * The allocation direction is top-down and region arrays are sorted from lower + * to higher addresses, so the new region will be the first entry in + * memory.reserved array. The previously reserved region does not get modified. + * Region counter and total size get updated. + */ +static int alloc_top_down_disjoint_check(void) +{ + /* After allocation, this will point to the "old" region */ + struct memblock_region *rgn1 = &memblock.reserved.regions[1]; + struct memblock_region *rgn2 = &memblock.reserved.regions[0]; + struct region r1; + void *allocated_ptr = NULL; + + phys_addr_t r2_size = SZ_16; + /* Use custom alignment */ + phys_addr_t alignment = SMP_CACHE_BYTES * 2; + phys_addr_t total_size; + phys_addr_t expected_start; + + setup_memblock(); + + r1.base = memblock_end_of_DRAM() - SZ_2; + r1.size = SZ_2; + + total_size = r1.size + r2_size; + expected_start = memblock_end_of_DRAM() - alignment; + + memblock_reserve(r1.base, r1.size); + + allocated_ptr = memblock_alloc(r2_size, alignment); + + assert(allocated_ptr); + assert(rgn1->size == r1.size); + assert(rgn1->base == r1.base); + + assert(rgn2->size == r2_size); + assert(rgn2->base == expected_start); + + assert(memblock.reserved.cnt == 2); + assert(memblock.reserved.total_size == total_size); + + return 0; +} + +/* + * A test that tries to allocate memory when there is enough space at the end + * of the previously reserved block (i.e. first fit): + * + * | +--------+--------------| + * | | r1 | r2 | + * +--------------+--------+--------------+ + * + * Expect a merge of both regions. Only the region size gets updated. + */ +static int alloc_top_down_before_check(void) +{ + struct memblock_region *rgn = &memblock.reserved.regions[0]; + void *allocated_ptr = NULL; + + /* + * The first region ends at the aligned address to test region merging + */ + phys_addr_t r1_size = SMP_CACHE_BYTES; + phys_addr_t r2_size = SZ_512; + phys_addr_t total_size = r1_size + r2_size; + + setup_memblock(); + + memblock_reserve(memblock_end_of_DRAM() - total_size, r1_size); + + allocated_ptr = memblock_alloc(r2_size, SMP_CACHE_BYTES); + + assert(allocated_ptr); + assert(rgn->size == total_size); + assert(rgn->base == memblock_end_of_DRAM() - total_size); + + assert(memblock.reserved.cnt == 1); + assert(memblock.reserved.total_size == total_size); + + return 0; +} + +/* + * A test that tries to allocate memory when there is not enough space at the + * end of the previously reserved block (i.e. second fit): + * + * | +-----------+------+ | + * | | r2 | r1 | | + * +------------+-----------+------+-----+ + * + * Expect a merge of both regions. Both the base address and size of the region + * get updated. + */ +static int alloc_top_down_after_check(void) +{ + struct memblock_region *rgn = &memblock.reserved.regions[0]; + struct region r1; + void *allocated_ptr = NULL; + + phys_addr_t r2_size = SZ_512; + phys_addr_t total_size; + + setup_memblock(); + + /* + * The first region starts at the aligned address to test region merging + */ + r1.base = memblock_end_of_DRAM() - SMP_CACHE_BYTES; + r1.size = SZ_8; + + total_size = r1.size + r2_size; + + memblock_reserve(r1.base, r1.size); + + allocated_ptr = memblock_alloc(r2_size, SMP_CACHE_BYTES); + + assert(allocated_ptr); + assert(rgn->size == total_size); + assert(rgn->base == r1.base - r2_size); + + assert(memblock.reserved.cnt == 1); + assert(memblock.reserved.total_size == total_size); + + return 0; +} + +/* + * A test that tries to allocate memory when there are two reserved regions with + * a gap too small to fit the new region: + * + * | +--------+----------+ +------| + * | | r3 | r2 | | r1 | + * +-------+--------+----------+---+------+ + * + * Expect to allocate a region before the one that starts at the lower address, + * and merge them into one. The region counter and total size fields get + * updated. + */ +static int alloc_top_down_second_fit_check(void) +{ + struct memblock_region *rgn = &memblock.reserved.regions[0]; + struct region r1, r2; + void *allocated_ptr = NULL; + + phys_addr_t r3_size = SZ_1K; + phys_addr_t total_size; + + setup_memblock(); + + r1.base = memblock_end_of_DRAM() - SZ_512; + r1.size = SZ_512; + + r2.base = r1.base - SZ_512; + r2.size = SZ_256; + + total_size = r1.size + r2.size + r3_size; + + memblock_reserve(r1.base, r1.size); + memblock_reserve(r2.base, r2.size); + + allocated_ptr = memblock_alloc(r3_size, SMP_CACHE_BYTES); + + assert(allocated_ptr); + assert(rgn->size == r2.size + r3_size); + assert(rgn->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 when there are two reserved regions with + * a gap big enough to accommodate the new region: + * + * | +--------+--------+--------+ | + * | | r2 | r3 | r1 | | + * +-----+--------+--------+--------+-----+ + * + * Expect to merge all of them, creating one big entry in memblock.reserved + * array. The region counter and total size fields get updated. + */ +static int alloc_in_between_generic_check(void) +{ + struct memblock_region *rgn = &memblock.reserved.regions[0]; + struct region r1, r2; + void *allocated_ptr = NULL; + + phys_addr_t gap_size = SMP_CACHE_BYTES; + phys_addr_t r3_size = SZ_64; + /* + * Calculate regions size so there's just enough space for the new entry + */ + phys_addr_t rgn_size = (MEM_SIZE - (2 * gap_size + r3_size)) / 2; + phys_addr_t total_size; + + setup_memblock(); + + r1.size = rgn_size; + r1.base = memblock_end_of_DRAM() - (gap_size + rgn_size); + + r2.size = rgn_size; + r2.base = memblock_start_of_DRAM() + gap_size; + + total_size = r1.size + r2.size + r3_size; + + memblock_reserve(r1.base, r1.size); + memblock_reserve(r2.base, r2.size); + + allocated_ptr = memblock_alloc(r3_size, SMP_CACHE_BYTES); + + assert(allocated_ptr); + assert(rgn->size == total_size); + assert(rgn->base == r1.base - r2.size - r3_size); + + assert(memblock.reserved.cnt == 1); + assert(memblock.reserved.total_size == total_size); + + return 0; +} + +/* + * A test that tries to allocate memory when the memory is filled with reserved + * regions with memory gaps too small to fit the new region: + * + * +-------+ + * | new | + * +--+----+ + * | +-----+ +-----+ +-----+ | + * | | res | | res | | res | | + * +----+-----+----+-----+----+-----+----+ + * + * Expect no allocation to happen. + */ +static int alloc_small_gaps_generic_check(void) +{ + void *allocated_ptr = NULL; + + phys_addr_t region_size = SZ_1K; + phys_addr_t gap_size = SZ_256; + phys_addr_t region_end; + + setup_memblock(); + + region_end = memblock_start_of_DRAM(); + + while (region_end < memblock_end_of_DRAM()) { + memblock_reserve(region_end + gap_size, region_size); + region_end += gap_size + region_size; + } + + allocated_ptr = memblock_alloc(region_size, SMP_CACHE_BYTES); + + assert(!allocated_ptr); + + return 0; +} + +/* + * A test that tries to allocate memory when all memory is reserved. + * Expect no allocation to happen. + */ +static int alloc_all_reserved_generic_check(void) +{ + void *allocated_ptr = NULL; + + setup_memblock(); + + /* Simulate full memory */ + memblock_reserve(memblock_start_of_DRAM(), MEM_SIZE); + + allocated_ptr = memblock_alloc(SZ_256, SMP_CACHE_BYTES); + + assert(!allocated_ptr); + + return 0; +} + +/* + * A test that tries to allocate memory when the memory is almost full, + * with not enough space left for the new region: + * + * +-------+ + * | new | + * +-------+ + * |-----------------------------+ | + * | reserved | | + * +-----------------------------+---+ + * + * Expect no allocation to happen. + */ +static int alloc_no_space_generic_check(void) +{ + void *allocated_ptr = NULL; + + setup_memblock(); + + phys_addr_t available_size = SZ_256; + phys_addr_t reserved_size = MEM_SIZE - available_size; + + /* Simulate almost-full memory */ + memblock_reserve(memblock_start_of_DRAM(), reserved_size); + + allocated_ptr = memblock_alloc(SZ_1K, SMP_CACHE_BYTES); + + assert(!allocated_ptr); + + return 0; +} + +/* + * A test that tries to allocate memory when the memory is almost full, + * but there is just enough space left: + * + * |---------------------------+---------| + * | reserved | new | + * +---------------------------+---------+ + * + * Expect to allocate memory and merge all the regions. The total size field + * gets updated. + */ +static int alloc_limited_space_generic_check(void) +{ + struct memblock_region *rgn = &memblock.reserved.regions[0]; + void *allocated_ptr = NULL; + + phys_addr_t available_size = SZ_256; + phys_addr_t reserved_size = MEM_SIZE - available_size; + + setup_memblock(); + + /* Simulate almost-full memory */ + memblock_reserve(memblock_start_of_DRAM(), reserved_size); + + allocated_ptr = memblock_alloc(available_size, SMP_CACHE_BYTES); + + assert(allocated_ptr); + assert(rgn->size == MEM_SIZE); + assert(rgn->base == memblock_start_of_DRAM()); + + assert(memblock.reserved.cnt == 1); + assert(memblock.reserved.total_size == MEM_SIZE); + + return 0; +} + +/* + * A test that tries to allocate memory when there is no available memory + * registered (i.e. memblock.memory has only a dummy entry). + * Expect no allocation to happen. + */ +static int alloc_no_memory_generic_check(void) +{ + struct memblock_region *rgn = &memblock.reserved.regions[0]; + void *allocated_ptr = NULL; + + reset_memblock_regions(); + + allocated_ptr = memblock_alloc(SZ_1K, SMP_CACHE_BYTES); + + assert(!allocated_ptr); + assert(rgn->size == 0); + assert(rgn->base == 0); + assert(memblock.reserved.total_size == 0); + + return 0; +} + +/* + * A simple test that tries to allocate a small memory region. + * Expect to allocate an aligned region at the beginning of the available |