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 SKIP_HWPOISON 0x1 34 #define REPORT_FAILURE 0x2 35 36 bool has_unmovable_pages(struct zone *zone, struct page *page, int count, 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 * If specified range includes migrate types other than MOVABLE or CMA, 45 * this will fail with -EBUSY. 46 * 47 * For isolating all pages in the range finally, the caller have to 48 * free all pages in the range. test_page_isolated() can be used for 49 * test it. 50 * 51 * The following flags are allowed (they can be combined in a bit mask) 52 * SKIP_HWPOISON - ignore hwpoison pages 53 * REPORT_FAILURE - report details about the failure to isolate the range 54 */ 55 int 56 start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, 57 unsigned migratetype, int flags); 58 59 /* 60 * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE. 61 * target range is [start_pfn, end_pfn) 62 */ 63 int 64 undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, 65 unsigned migratetype); 66 67 /* 68 * Test all pages in [start_pfn, end_pfn) are isolated or not. 69 */ 70 int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn, 71 bool skip_hwpoisoned_pages); 72 73 struct page *alloc_migrate_target(struct page *page, unsigned long private); 74 75 #endif 76