1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __LINUX_PAGEISOLATION_H 3 #define __LINUX_PAGEISOLATION_H 4 5 #ifdef CONFIG_MEMORY_ISOLATION 6 static inline bool has_isolate_pageblock(struct zone *zone) 7 { 8 return zone->nr_isolate_pageblock; 9 } 10 static inline bool is_migrate_isolate_page(struct page *page) 11 { 12 return get_pageblock_migratetype(page) == MIGRATE_ISOLATE; 13 } 14 static inline bool is_migrate_isolate(int migratetype) 15 { 16 return migratetype == MIGRATE_ISOLATE; 17 } 18 #else 19 static inline bool has_isolate_pageblock(struct zone *zone) 20 { 21 return false; 22 } 23 static inline bool is_migrate_isolate_page(struct page *page) 24 { 25 return false; 26 } 27 static inline bool is_migrate_isolate(int migratetype) 28 { 29 return false; 30 } 31 #endif 32 33 #define MEMORY_OFFLINE 0x1 34 #define REPORT_FAILURE 0x2 35 36 struct page *has_unmovable_pages(struct zone *zone, struct page *page, 37 int migratetype, int flags); 38 void set_pageblock_migratetype(struct page *page, int migratetype); 39 int move_freepages_block(struct zone *zone, struct page *page, 40 int migratetype, int *num_movable); 41 42 /* 43 * Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE. 44 */ 45 int 46 start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, 47 unsigned migratetype, int flags); 48 49 /* 50 * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE. 51 * target range is [start_pfn, end_pfn) 52 */ 53 void 54 undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, 55 unsigned migratetype); 56 57 /* 58 * Test all pages in [start_pfn, end_pfn) are isolated or not. 59 */ 60 int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn, 61 int isol_flags); 62 63 struct page *alloc_migrate_target(struct page *page, unsigned long private); 64 65 #endif 66