1583 static int __init pcpu_verify_alloc_info(const struct pcpu_alloc_info *ai);
2447  * Allocate ai which is large enough for @nr_groups groups containing
2448  * @nr_units units.  The returned ai's groups[0].cpu_map points to the
2460 	struct pcpu_alloc_info *ai;  in pcpu_alloc_alloc_info()  local
2465 	base_size = ALIGN(struct_size(ai, groups, nr_groups),  in pcpu_alloc_alloc_info()
2466 			  __alignof__(ai->groups[0].cpu_map[0]));  in pcpu_alloc_alloc_info()
2467 	ai_size = base_size + nr_units * sizeof(ai->groups[0].cpu_map[0]);  in pcpu_alloc_alloc_info()
2472 	ai = ptr;  in pcpu_alloc_alloc_info()
2475 	ai->groups[0].cpu_map = ptr;  in pcpu_alloc_alloc_info()
2478 		ai->groups[0].cpu_map[unit] = NR_CPUS;  in pcpu_alloc_alloc_info()
2480 	ai->nr_groups = nr_groups;  in pcpu_alloc_alloc_info()
2481 	ai->__ai_size = PFN_ALIGN(ai_size);  in pcpu_alloc_alloc_info()
2483 	return ai;  in pcpu_alloc_alloc_info()
2488  * @ai: pcpu_alloc_info to free
2490  * Free @ai which was allocated by pcpu_alloc_alloc_info().
2492 void __init pcpu_free_alloc_info(struct pcpu_alloc_info *ai)  in pcpu_free_alloc_info()  argument
2494 	memblock_free(ai, ai->__ai_size);  in pcpu_free_alloc_info()
2500  * @ai: allocation info to dump
2502  * Print out information about @ai using loglevel @lvl.
2505 				 const struct pcpu_alloc_info *ai)  in pcpu_dump_alloc_info()  argument
2513 	v = ai->nr_groups;  in pcpu_dump_alloc_info()
2522 	upa = ai->alloc_size / ai->unit_size;  in pcpu_dump_alloc_info()
2527 	       lvl, ai->static_size, ai->reserved_size, ai->dyn_size,  in pcpu_dump_alloc_info()
2528 	       ai->unit_size, ai->alloc_size / ai->atom_size, ai->atom_size);  in pcpu_dump_alloc_info()
2530 	for (group = 0; group < ai->nr_groups; group++) {  in pcpu_dump_alloc_info()
2531 		const struct pcpu_group_info *gi = &ai->groups[group];  in pcpu_dump_alloc_info()
2556  * @ai: pcpu_alloc_info describing how to percpu area is shaped
2563  * @ai contains all information necessary to initialize the first
2566  * @ai->static_size is the size of static percpu area.
2568  * @ai->reserved_size, if non-zero, specifies the amount of bytes to
2576  * @ai->dyn_size determines the number of bytes available for dynamic
2577  * allocation in the first chunk.  The area between @ai->static_size +
2578  * @ai->reserved_size + @ai->dyn_size and @ai->unit_size is unused.
2580  * @ai->unit_size specifies unit size and must be aligned to PAGE_SIZE
2581  * and equal to or larger than @ai->static_size + @ai->reserved_size +
2582  * @ai->dyn_size.
2584  * @ai->atom_size is the allocation atom size and used as alignment
2587  * @ai->alloc_size is the allocation size and always multiple of
2588  * @ai->atom_size.  This is larger than @ai->atom_size if
2589  * @ai->unit_size is larger than @ai->atom_size.
2591  * @ai->nr_groups and @ai->groups describe virtual memory layout of
2594  * groupings.  If @ai->nr_groups is zero, a single group containing
2608 void __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,  in pcpu_setup_first_chunk()  argument
2611 	size_t size_sum = ai->static_size + ai->reserved_size + ai->dyn_size;  in pcpu_setup_first_chunk()
2627 		pcpu_dump_alloc_info(KERN_EMERG, ai);			\  in pcpu_setup_first_chunk()
2633 	PCPU_SETUP_BUG_ON(ai->nr_groups <= 0);  in pcpu_setup_first_chunk()
2635 	PCPU_SETUP_BUG_ON(!ai->static_size);  in pcpu_setup_first_chunk()
2640 	PCPU_SETUP_BUG_ON(ai->unit_size < size_sum);  in pcpu_setup_first_chunk()
2641 	PCPU_SETUP_BUG_ON(offset_in_page(ai->unit_size));  in pcpu_setup_first_chunk()
2642 	PCPU_SETUP_BUG_ON(ai->unit_size < PCPU_MIN_UNIT_SIZE);  in pcpu_setup_first_chunk()
2643 	PCPU_SETUP_BUG_ON(!IS_ALIGNED(ai->unit_size, PCPU_BITMAP_BLOCK_SIZE));  in pcpu_setup_first_chunk()
2644 	PCPU_SETUP_BUG_ON(ai->dyn_size < PERCPU_DYNAMIC_EARLY_SIZE);  in pcpu_setup_first_chunk()
2645 	PCPU_SETUP_BUG_ON(!IS_ALIGNED(ai->reserved_size, PCPU_MIN_ALLOC_SIZE));  in pcpu_setup_first_chunk()
2648 	PCPU_SETUP_BUG_ON(pcpu_verify_alloc_info(ai) < 0);  in pcpu_setup_first_chunk()
2651 	alloc_size = ai->nr_groups * sizeof(group_offsets[0]);  in pcpu_setup_first_chunk()
2657 	alloc_size = ai->nr_groups * sizeof(group_sizes[0]);  in pcpu_setup_first_chunk()
2681 	for (group = 0, unit = 0; group < ai->nr_groups; group++, unit += i) {  in pcpu_setup_first_chunk()
2682 		const struct pcpu_group_info *gi = &ai->groups[group];  in pcpu_setup_first_chunk()
2685 		group_sizes[group] = gi->nr_units * ai->unit_size;  in pcpu_setup_first_chunk()
2697 			unit_off[cpu] = gi->base_offset + i * ai->unit_size;  in pcpu_setup_first_chunk()
2715 	pcpu_dump_alloc_info(KERN_DEBUG, ai);  in pcpu_setup_first_chunk()
2717 	pcpu_nr_groups = ai->nr_groups;  in pcpu_setup_first_chunk()
2724 	pcpu_unit_pages = ai->unit_size >> PAGE_SHIFT;  in pcpu_setup_first_chunk()
2726 	pcpu_atom_size = ai->atom_size;  in pcpu_setup_first_chunk()
2730 	pcpu_stats_save_ai(ai);  in pcpu_setup_first_chunk()
2760 	static_size = ALIGN(ai->static_size, PCPU_MIN_ALLOC_SIZE);  in pcpu_setup_first_chunk()
2761 	dyn_size = ai->dyn_size - (static_size - ai->static_size);  in pcpu_setup_first_chunk()
2775 	if (ai->reserved_size)  in pcpu_setup_first_chunk()
2777 						ai->reserved_size);  in pcpu_setup_first_chunk()
2778 	tmp_addr = (unsigned long)base_addr + static_size + ai->reserved_size;  in pcpu_setup_first_chunk()
2878 	struct pcpu_alloc_info *ai;  in pcpu_build_alloc_info()  local
2968 	ai = pcpu_alloc_alloc_info(nr_groups, nr_units);  in pcpu_build_alloc_info()
2969 	if (!ai)  in pcpu_build_alloc_info()
2971 	cpu_map = ai->groups[0].cpu_map;  in pcpu_build_alloc_info()
2974 		ai->groups[group].cpu_map = cpu_map;  in pcpu_build_alloc_info()
2978 	ai->static_size = static_size;  in pcpu_build_alloc_info()
2979 	ai->reserved_size = reserved_size;  in pcpu_build_alloc_info()
2980 	ai->dyn_size = dyn_size;  in pcpu_build_alloc_info()
2981 	ai->unit_size = alloc_size / upa;  in pcpu_build_alloc_info()
2982 	ai->atom_size = atom_size;  in pcpu_build_alloc_info()
2983 	ai->alloc_size = alloc_size;  in pcpu_build_alloc_info()
2986 		struct pcpu_group_info *gi = &ai->groups[group];  in pcpu_build_alloc_info()
2993 		gi->base_offset = unit * ai->unit_size;  in pcpu_build_alloc_info()
3003 	return ai;  in pcpu_build_alloc_info()
3082 	struct pcpu_alloc_info *ai;  in pcpu_embed_first_chunk()  local
3087 	ai = pcpu_build_alloc_info(reserved_size, dyn_size, atom_size,  in pcpu_embed_first_chunk()
3089 	if (IS_ERR(ai))  in pcpu_embed_first_chunk()
3090 		return PTR_ERR(ai);  in pcpu_embed_first_chunk()
3092 	size_sum = ai->static_size + ai->reserved_size + ai->dyn_size;  in pcpu_embed_first_chunk()
3093 	areas_size = PFN_ALIGN(ai->nr_groups * sizeof(void *));  in pcpu_embed_first_chunk()
3103 	for (group = 0; group < ai->nr_groups; group++) {  in pcpu_embed_first_chunk()
3104 		struct pcpu_group_info *gi = &ai->groups[group];  in pcpu_embed_first_chunk()
3113 		ptr = pcpu_fc_alloc(cpu, gi->nr_units * ai->unit_size, atom_size, cpu_to_nd_fn);  in pcpu_embed_first_chunk()
3127 	max_distance += ai->unit_size * ai->groups[highest_group].nr_units;  in pcpu_embed_first_chunk()
3145 	for (group = 0; group < ai->nr_groups; group++) {  in pcpu_embed_first_chunk()
3146 		struct pcpu_group_info *gi = &ai->groups[group];  in pcpu_embed_first_chunk()
3149 		for (i = 0; i < gi->nr_units; i++, ptr += ai->unit_size) {  in pcpu_embed_first_chunk()
3152 				pcpu_fc_free(ptr, ai->unit_size);  in pcpu_embed_first_chunk()
3156 			memcpy(ptr, __per_cpu_load, ai->static_size);  in pcpu_embed_first_chunk()
3157 			pcpu_fc_free(ptr + size_sum, ai->unit_size - size_sum);  in pcpu_embed_first_chunk()
3162 	for (group = 0; group < ai->nr_groups; group++) {  in pcpu_embed_first_chunk()
3163 		ai->groups[group].base_offset = areas[group] - base;  in pcpu_embed_first_chunk()
3167 		PFN_DOWN(size_sum), ai->static_size, ai->reserved_size,  in pcpu_embed_first_chunk()
3168 		ai->dyn_size, ai->unit_size);  in pcpu_embed_first_chunk()
3170 	pcpu_setup_first_chunk(ai, base);  in pcpu_embed_first_chunk()
3174 	for (group = 0; group < ai->nr_groups; group++)  in pcpu_embed_first_chunk()
3177 				ai->groups[group].nr_units * ai->unit_size);  in pcpu_embed_first_chunk()
3179 	pcpu_free_alloc_info(ai);  in pcpu_embed_first_chunk()
3267 	struct pcpu_alloc_info *ai;  in pcpu_page_first_chunk()  local
3278 	ai = pcpu_build_alloc_info(reserved_size, 0, PAGE_SIZE, NULL);  in pcpu_page_first_chunk()
3279 	if (IS_ERR(ai))  in pcpu_page_first_chunk()
3280 		return PTR_ERR(ai);  in pcpu_page_first_chunk()
3281 	BUG_ON(ai->nr_groups != 1);  in pcpu_page_first_chunk()
3282 	upa = ai->alloc_size/ai->unit_size;  in pcpu_page_first_chunk()
3284 	if (WARN_ON(ai->groups[0].nr_units != nr_g0_units)) {  in pcpu_page_first_chunk()
3285 		pcpu_free_alloc_info(ai);  in pcpu_page_first_chunk()
3289 	unit_pages = ai->unit_size >> PAGE_SHIFT;  in pcpu_page_first_chunk()
3302 		unsigned int cpu = ai->groups[0].cpu_map[unit];  in pcpu_page_first_chunk()
3320 	vm.size = num_possible_cpus() * ai->unit_size;  in pcpu_page_first_chunk()
3325 			(unsigned long)vm.addr + unit * ai->unit_size;  in pcpu_page_first_chunk()
3336 		flush_cache_vmap_early(unit_addr, unit_addr + ai->unit_size);  in pcpu_page_first_chunk()
3339 		memcpy((void *)unit_addr, __per_cpu_load, ai->static_size);  in pcpu_page_first_chunk()
3344 		unit_pages, psize_str, ai->static_size,  in pcpu_page_first_chunk()
3345 		ai->reserved_size, ai->dyn_size);  in pcpu_page_first_chunk()
3347 	pcpu_setup_first_chunk(ai, vm.addr);  in pcpu_page_first_chunk()
3356 	pcpu_free_alloc_info(ai);  in pcpu_page_first_chunk()
3412 	struct pcpu_alloc_info *ai;  in setup_per_cpu_areas()  local
3415 	ai = pcpu_alloc_alloc_info(1, 1);  in setup_per_cpu_areas()
3417 	if (!ai || !fc)  in setup_per_cpu_areas()
3422 	ai->dyn_size = unit_size;  in setup_per_cpu_areas()
3423 	ai->unit_size = unit_size;  in setup_per_cpu_areas()
3424 	ai->atom_size = unit_size;  in setup_per_cpu_areas()
3425 	ai->alloc_size = unit_size;  in setup_per_cpu_areas()
3426 	ai->groups[0].nr_units = 1;  in setup_per_cpu_areas()
3427 	ai->groups[0].cpu_map[0] = 0;  in setup_per_cpu_areas()
3429 	pcpu_setup_first_chunk(ai, fc);  in setup_per_cpu_areas()
3430 	pcpu_free_alloc_info(ai);  in setup_per_cpu_areas()