memblock tests: Add skeleton of the memblock simulator

F:	Documentation/core-api/boot-time-mm.rst

F:	include/linux/memblock.h

F:	mm/memblock.c

F:	tools/testing/memblock/

MEMORY CONTROLLER DRIVERS

M:	Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>

void *kmalloc(size_t size, gfp_t gfp);

void kfree(void *p);

bool slab_is_available(void);

enum slab_state {

	DOWN,

	PARTIAL,

	PARTIAL_NODE,

	UP,

	FULL

};

static inline void *kzalloc(size_t size, gfp_t gfp)

{

	return kmalloc(size, gfp | __GFP_ZERO);

main

memblock.c

linux/memblock.h

asm/cmpxchg.h

# 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

OFILES = main.o memblock.o lib/slab.o mmzone.o slab.o

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

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _TOOLS_DMA_H

#define _TOOLS_DMA_H

#endif