143 		 * memmap=nn@ss specifies usable region, should  in parse_memmap()
152 		 * system can use. Region above the limit should be avoided.  in parse_memmap()
362 	 * Avoid the region that is unsafe to overlap during  in mem_avoid_init()
401  * overlap region with the lowest address.
463 static void store_slot_info(struct mem_vector *region, unsigned long image_size)  in store_slot_info()  argument
470 	slot_area.addr = region->start;  in store_slot_info()
471 	slot_area.num = 1 + (region->size - image_size) / CONFIG_PHYSICAL_ALIGN;  in store_slot_info()
478  * Skip as many 1GB huge pages as possible in the passed region
482 process_gb_huge_pages(struct mem_vector *region, unsigned long image_size)  in process_gb_huge_pages()  argument
489 		store_slot_info(region, image_size);  in process_gb_huge_pages()
493 	/* Are there any 1GB pages in the region? */  in process_gb_huge_pages()
494 	pud_start = ALIGN(region->start, PUD_SIZE);  in process_gb_huge_pages()
495 	pud_end = ALIGN_DOWN(region->start + region->size, PUD_SIZE);  in process_gb_huge_pages()
499 		store_slot_info(region, image_size);  in process_gb_huge_pages()
503 	/* Check if the head part of the region is usable. */  in process_gb_huge_pages()
504 	if (pud_start >= region->start + image_size) {  in process_gb_huge_pages()
505 		tmp.start = region->start;  in process_gb_huge_pages()
506 		tmp.size = pud_start - region->start;  in process_gb_huge_pages()
519 	/* Check if the tail part of the region is usable. */  in process_gb_huge_pages()
520 	if (region->start + region->size >= pud_end + image_size) {  in process_gb_huge_pages()
522 		tmp.size = region->start + region->size - pud_end;  in process_gb_huge_pages()
555 	struct mem_vector region, overlap;  in __process_mem_region()  local
559 	region.start = max_t(u64, entry->start, minimum);  in __process_mem_region()
565 		region.start = ALIGN(region.start, CONFIG_PHYSICAL_ALIGN);  in __process_mem_region()
568 		if (region.start > region_end)  in __process_mem_region()
572 		region.size = region_end - region.start;  in __process_mem_region()
574 		/* Return if region can't contain decompressed kernel */  in __process_mem_region()
575 		if (region.size < image_size)  in __process_mem_region()
578 		/* If nothing overlaps, store the region and return. */  in __process_mem_region()
579 		if (!mem_avoid_overlap(&region, &overlap)) {  in __process_mem_region()
580 			process_gb_huge_pages(&region, image_size);  in __process_mem_region()
584 		/* Store beginning of region if holds at least image_size. */  in __process_mem_region()
585 		if (overlap.start >= region.start + image_size) {  in __process_mem_region()
586 			region.size = overlap.start - region.start;  in __process_mem_region()
587 			process_gb_huge_pages(&region, image_size);  in __process_mem_region()
590 		/* Clip off the overlapping region and start over. */  in __process_mem_region()
591 		region.start = overlap.start + overlap.size;  in __process_mem_region()
595 static bool process_mem_region(struct mem_vector *region,  in process_mem_region()  argument
602 	 * use @region directly.  in process_mem_region()
605 		__process_mem_region(region, minimum, image_size);  in process_mem_region()
617 	 * immovable memory and @region.  in process_mem_region()
623 		if (!mem_overlaps(region, &immovable_mem[i]))  in process_mem_region()
628 		region_end = region->start + region->size;  in process_mem_region()
630 		entry.start = clamp(region->start, start, end);  in process_mem_region()
682 	struct mem_vector region;  in process_efi_entries()  local
728 		region.start = md->phys_addr;  in process_efi_entries()
729 		region.size = md->num_pages << EFI_PAGE_SHIFT;  in process_efi_entries()
730 		if (process_mem_region(&region, minimum, image_size))  in process_efi_entries()
747 	struct mem_vector region;  in process_e820_entries()  local
756 		region.start = entry->addr;  in process_e820_entries()
757 		region.size = entry->size;  in process_e820_entries()
758 		if (process_mem_region(&region, minimum, image_size))  in process_e820_entries()
794 		struct mem_vector region = {  in process_kho_entries()  local
799 		if (process_mem_region(&region, minimum, image_size))  in process_kho_entries()
896 		warn("Physical KASLR disabled: no suitable memory region!");  in choose_random_location()