224 static int check_pfn_span(unsigned long pfn, unsigned long nr_pages,  in check_pfn_span()  argument
243 			|| !IS_ALIGNED(nr_pages, min_align)) {  in check_pfn_span()
245 				reason, pfn, pfn + nr_pages - 1);  in check_pfn_span()
305 int __ref __add_pages(int nid, unsigned long pfn, unsigned long nr_pages,  in __add_pages()  argument
308 	const unsigned long end_pfn = pfn + nr_pages;  in __add_pages()
316 	VM_BUG_ON(!mhp_range_allowed(PFN_PHYS(pfn), nr_pages * PAGE_SIZE, false));  in __add_pages()
323 				|| vmem_altmap_offset(altmap) > nr_pages) {  in __add_pages()
330 	err = check_pfn_span(pfn, nr_pages, "add");  in __add_pages()
463 				      unsigned long nr_pages)  in remove_pfn_range_from_zone()  argument
465 	const unsigned long end_pfn = start_pfn + nr_pages;  in remove_pfn_range_from_zone()
490 	shrink_zone_span(zone, start_pfn, start_pfn + nr_pages);  in remove_pfn_range_from_zone()
496 static void __remove_section(unsigned long pfn, unsigned long nr_pages,  in __remove_section()  argument
505 	sparse_remove_section(ms, pfn, nr_pages, map_offset, altmap);  in __remove_section()
519 void __remove_pages(unsigned long pfn, unsigned long nr_pages,  in __remove_pages()  argument
522 	const unsigned long end_pfn = pfn + nr_pages;  in __remove_pages()
528 	if (check_pfn_span(pfn, nr_pages, "remove"))  in __remove_pages()
596 static void online_pages_range(unsigned long start_pfn, unsigned long nr_pages)  in online_pages_range()  argument
598 	const unsigned long end_pfn = start_pfn + nr_pages;  in online_pages_range()
622 static void node_states_check_changes_online(unsigned long nr_pages,  in node_states_check_changes_online()  argument
654 		unsigned long nr_pages)  in resize_zone_range()  argument
661 	zone->spanned_pages = max(start_pfn + nr_pages, old_end_pfn) - zone->zone_start_pfn;  in resize_zone_range()
665                                      unsigned long nr_pages)  in resize_pgdat_range()  argument
672 	pgdat->node_spanned_pages = max(start_pfn + nr_pages, old_end_pfn) - pgdat->node_start_pfn;  in resize_pgdat_range()
693 				  unsigned long nr_pages,  in move_pfn_range_to_zone()  argument
702 		init_currently_empty_zone(zone, start_pfn, nr_pages);  in move_pfn_range_to_zone()
703 	resize_zone_range(zone, start_pfn, nr_pages);  in move_pfn_range_to_zone()
704 	resize_pgdat_range(pgdat, start_pfn, nr_pages);  in move_pfn_range_to_zone()
715 		if (!IS_ALIGNED(start_pfn + nr_pages, PAGES_PER_SECTION))  in move_pfn_range_to_zone()
716 			section_taint_zone_device(start_pfn + nr_pages);  in move_pfn_range_to_zone()
725 	memmap_init_range(nr_pages, nid, zone_idx(zone), start_pfn, 0,  in move_pfn_range_to_zone()
786 					    unsigned long nr_pages)  in auto_movable_can_online_movable()  argument
830 	movable_pages += nr_pages;  in auto_movable_can_online_movable()
840 		unsigned long nr_pages)  in default_kernel_zone_for_pfn()  argument
848 		if (zone_intersects(zone, start_pfn, nr_pages))  in default_kernel_zone_for_pfn()
908 					      unsigned long nr_pages)  in auto_movable_zone_for_pfn()  argument
923 	} else if (!group || group->d.unit_pages == nr_pages) {  in auto_movable_zone_for_pfn()
924 		max_pages = nr_pages;  in auto_movable_zone_for_pfn()
951 	nr_pages = max_pages - online_pages;  in auto_movable_zone_for_pfn()
952 	if (!auto_movable_can_online_movable(NUMA_NO_NODE, group, nr_pages))  in auto_movable_zone_for_pfn()
957 	    !auto_movable_can_online_movable(nid, group, nr_pages))  in auto_movable_zone_for_pfn()
963 	return default_kernel_zone_for_pfn(nid, pfn, nr_pages);  in auto_movable_zone_for_pfn()
967 		unsigned long nr_pages)  in default_zone_for_pfn()  argument
970 			nr_pages);  in default_zone_for_pfn()
972 	bool in_kernel = zone_intersects(kernel_zone, start_pfn, nr_pages);  in default_zone_for_pfn()
973 	bool in_movable = zone_intersects(movable_zone, start_pfn, nr_pages);  in default_zone_for_pfn()
992 		unsigned long nr_pages)  in zone_for_pfn_range()  argument
995 		return default_kernel_zone_for_pfn(nid, start_pfn, nr_pages);  in zone_for_pfn_range()
1001 		return auto_movable_zone_for_pfn(nid, group, start_pfn, nr_pages);  in zone_for_pfn_range()
1003 	return default_zone_for_pfn(nid, start_pfn, nr_pages);  in zone_for_pfn_range()
1011 			       long nr_pages)  in adjust_present_page_count()  argument
1021 		zone->present_early_pages += nr_pages;  in adjust_present_page_count()
1022 	zone->present_pages += nr_pages;  in adjust_present_page_count()
1023 	zone->zone_pgdat->node_present_pages += nr_pages;  in adjust_present_page_count()
1026 		group->present_movable_pages += nr_pages;  in adjust_present_page_count()
1028 		group->present_kernel_pages += nr_pages;  in adjust_present_page_count()
1031 int mhp_init_memmap_on_memory(unsigned long pfn, unsigned long nr_pages,  in mhp_init_memmap_on_memory()  argument
1034 	unsigned long end_pfn = pfn + nr_pages;  in mhp_init_memmap_on_memory()
1037 	ret = kasan_add_zero_shadow(__va(PFN_PHYS(pfn)), PFN_PHYS(nr_pages));  in mhp_init_memmap_on_memory()
1041 	move_pfn_range_to_zone(zone, pfn, nr_pages, NULL, MIGRATE_UNMOVABLE);  in mhp_init_memmap_on_memory()
1048 	if (nr_pages >= PAGES_PER_SECTION)  in mhp_init_memmap_on_memory()
1054 void mhp_deinit_memmap_on_memory(unsigned long pfn, unsigned long nr_pages)  in mhp_deinit_memmap_on_memory()  argument
1056 	unsigned long end_pfn = pfn + nr_pages;  in mhp_deinit_memmap_on_memory()
1063 	if (nr_pages >= PAGES_PER_SECTION)  in mhp_deinit_memmap_on_memory()
1070 	remove_pfn_range_from_zone(page_zone(pfn_to_page(pfn)), pfn, nr_pages);  in mhp_deinit_memmap_on_memory()
1071 	kasan_remove_zero_shadow(__va(PFN_PHYS(pfn)), PFN_PHYS(nr_pages));  in mhp_deinit_memmap_on_memory()
1074 int __ref online_pages(unsigned long pfn, unsigned long nr_pages,  in online_pages()  argument
1090 	if (WARN_ON_ONCE(!nr_pages ||  in online_pages()
1092 			 !IS_ALIGNED(pfn + nr_pages, PAGES_PER_SECTION)))  in online_pages()
1098 	move_pfn_range_to_zone(zone, pfn, nr_pages, NULL, MIGRATE_ISOLATE);  in online_pages()
1101 	arg.nr_pages = nr_pages;  in online_pages()
1102 	node_states_check_changes_online(nr_pages, zone, &arg);  in online_pages()
1114 	zone->nr_isolate_pageblock += nr_pages / pageblock_nr_pages;  in online_pages()
1127 	online_pages_range(pfn, nr_pages);  in online_pages()
1128 	adjust_present_page_count(pfn_to_page(pfn), group, nr_pages);  in online_pages()
1135 	undo_isolate_page_range(pfn, pfn + nr_pages, MIGRATE_MOVABLE);  in online_pages()
1160 		 (((unsigned long long) pfn + nr_pages) << PAGE_SHIFT) - 1);  in online_pages()
1162 	remove_pfn_range_from_zone(zone, pfn, nr_pages);  in online_pages()
1797 static void node_states_check_changes_offline(unsigned long nr_pages,  in node_states_check_changes_offline()  argument
1818 	if (zone_idx(zone) <= ZONE_NORMAL && nr_pages >= present_pages)  in node_states_check_changes_offline()
1831 	if (zone_idx(zone) <= ZONE_HIGHMEM && nr_pages >= present_pages)  in node_states_check_changes_offline()
1847 	if (nr_pages >= present_pages)  in node_states_check_changes_offline()
1864 				     unsigned long nr_pages, void *data)  in count_system_ram_pages_cb()  argument
1868 	*nr_system_ram_pages += nr_pages;  in count_system_ram_pages_cb()
1872 int __ref offline_pages(unsigned long start_pfn, unsigned long nr_pages,  in offline_pages()  argument
1875 	const unsigned long end_pfn = start_pfn + nr_pages;  in offline_pages()
1890 	if (WARN_ON_ONCE(!nr_pages ||  in offline_pages()
1892 			 !IS_ALIGNED(start_pfn + nr_pages, PAGES_PER_SECTION)))  in offline_pages()
1905 	walk_system_ram_range(start_pfn, nr_pages, &system_ram_pages,  in offline_pages()
1907 	if (system_ram_pages != nr_pages) {  in offline_pages()
1940 	arg.nr_pages = nr_pages;  in offline_pages()
1941 	node_states_check_changes_offline(nr_pages, zone, &arg);  in offline_pages()
1993 	pr_debug("Offlined Pages %ld\n", nr_pages);  in offline_pages()
2001 	zone->nr_isolate_pageblock -= nr_pages / pageblock_nr_pages;  in offline_pages()
2008 	adjust_managed_page_count(pfn_to_page(start_pfn), -nr_pages);  in offline_pages()
2009 	adjust_present_page_count(pfn_to_page(start_pfn), group, -nr_pages);  in offline_pages()
2028 	remove_pfn_range_from_zone(zone, start_pfn, nr_pages);  in offline_pages()