1 // SPDX-License-Identifier: GPL-2.0
13  * Return the number of slots covered by this entry, i.e., the number of
25 	if (md->type != EFI_CONVENTIONAL_MEMORY)  in get_entry_num_slots()
28 	if (md->attribute & EFI_MEMORY_HOT_PLUGGABLE)  in get_entry_num_slots()
32 	    (md->attribute & EFI_MEMORY_SP))  in get_entry_num_slots()
35 	region_end = min(md->phys_addr + md->num_pages * EFI_PAGE_SIZE - 1,  in get_entry_num_slots()
40 	first_slot = round_up(max(md->phys_addr, alloc_min), align);  in get_entry_num_slots()
41 	last_slot = round_down(region_end - size + 1, align);  in get_entry_num_slots()
46 	return ((unsigned long)(last_slot - first_slot) >> align_shift) + 1;  in get_entry_num_slots()
55 #define MD_NUM_SLOTS(md)	((md)->virt_addr)
84 	/* count the suitable slots in each memory map entry */  in efi_random_alloc()
85 	for (map_offset = 0; map_offset < map->map_size; map_offset += map->desc_size) {  in efi_random_alloc()
86 		efi_memory_desc_t *md = (void *)map->map + map_offset;  in efi_random_alloc()
87 		unsigned long slots;  in efi_random_alloc()  local
89 		slots = get_entry_num_slots(md, size, ilog2(align), alloc_min,  in efi_random_alloc()
91 		MD_NUM_SLOTS(md) = slots;  in efi_random_alloc()
92 		total_slots += slots;  in efi_random_alloc()
93 		if (md->attribute & EFI_MEMORY_MORE_RELIABLE)  in efi_random_alloc()
94 			total_mirrored_slots += slots;  in efi_random_alloc()
97 	/* consider only mirrored slots for randomization if any exist */  in efi_random_alloc()
106 	 * it corresponds with exactly one of the suitable slots we recorded  in efi_random_alloc()
107 	 * when iterating over the memory map the first time around.  in efi_random_alloc()
110 	 * slots of each entry at each iteration, until we have found the entry  in efi_random_alloc()
116 	for (map_offset = 0; map_offset < map->map_size; map_offset += map->desc_size) {  in efi_random_alloc()
117 		efi_memory_desc_t *md = (void *)map->map + map_offset;  in efi_random_alloc()
122 		    !(md->attribute & EFI_MEMORY_MORE_RELIABLE))  in efi_random_alloc()
126 			target_slot -= MD_NUM_SLOTS(md);  in efi_random_alloc()
130 		target = round_up(max_t(u64, md->phys_addr, alloc_min), align) + target_slot * align;  in efi_random_alloc()