1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __LINUX_PAGEISOLATION_H
3 #define __LINUX_PAGEISOLATION_H
4
5 #ifdef CONFIG_MEMORY_ISOLATION
is_migrate_isolate_page(struct page * page)6 static inline bool is_migrate_isolate_page(struct page *page)
7 {
8 return get_pageblock_migratetype(page) == MIGRATE_ISOLATE;
9 }
is_migrate_isolate(int migratetype)10 static inline bool is_migrate_isolate(int migratetype)
11 {
12 return migratetype == MIGRATE_ISOLATE;
13 }
14 #define get_pageblock_isolate(page) \
15 get_pfnblock_bit(page, page_to_pfn(page), PB_migrate_isolate)
16 #define clear_pageblock_isolate(page) \
17 clear_pfnblock_bit(page, page_to_pfn(page), PB_migrate_isolate)
18 #define set_pageblock_isolate(page) \
19 set_pfnblock_bit(page, page_to_pfn(page), PB_migrate_isolate)
20 #else
is_migrate_isolate_page(struct page * page)21 static inline bool is_migrate_isolate_page(struct page *page)
22 {
23 return false;
24 }
is_migrate_isolate(int migratetype)25 static inline bool is_migrate_isolate(int migratetype)
26 {
27 return false;
28 }
get_pageblock_isolate(struct page * page)29 static inline bool get_pageblock_isolate(struct page *page)
30 {
31 return false;
32 }
clear_pageblock_isolate(struct page * page)33 static inline void clear_pageblock_isolate(struct page *page)
34 {
35 }
set_pageblock_isolate(struct page * page)36 static inline void set_pageblock_isolate(struct page *page)
37 {
38 }
39 #endif
40
41 /*
42 * Pageblock isolation modes:
43 * PB_ISOLATE_MODE_MEM_OFFLINE - isolate to offline (!allocate) memory
44 * e.g., skip over PageHWPoison() pages and
45 * PageOffline() pages. Unmovable pages will be
46 * reported in this mode.
47 * PB_ISOLATE_MODE_CMA_ALLOC - isolate for CMA allocations
48 * PB_ISOLATE_MODE_OTHER - isolate for other purposes
49 */
50 enum pb_isolate_mode {
51 PB_ISOLATE_MODE_MEM_OFFLINE,
52 PB_ISOLATE_MODE_CMA_ALLOC,
53 PB_ISOLATE_MODE_OTHER,
54 };
55
56 void __meminit init_pageblock_migratetype(struct page *page,
57 enum migratetype migratetype,
58 bool isolate);
59
60 bool pageblock_isolate_and_move_free_pages(struct zone *zone, struct page *page);
61 bool pageblock_unisolate_and_move_free_pages(struct zone *zone, struct page *page);
62
63 int start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
64 enum pb_isolate_mode mode);
65
66 void undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn);
67
68 int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn,
69 enum pb_isolate_mode mode);
70 #endif
71