Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __LINUX_PAGEISOLATION_H
3#define __LINUX_PAGEISOLATION_H
4
5#ifdef CONFIG_MEMORY_ISOLATION
6static inline bool is_migrate_isolate_page(struct page *page)
7{
8 return get_pageblock_migratetype(page) == MIGRATE_ISOLATE;
9}
10static 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
21static inline bool is_migrate_isolate_page(struct page *page)
22{
23 return false;
24}
25static inline bool is_migrate_isolate(int migratetype)
26{
27 return false;
28}
29static inline bool get_pageblock_isolate(struct page *page)
30{
31 return false;
32}
33static inline void clear_pageblock_isolate(struct page *page)
34{
35}
36static 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 */
50enum pb_isolate_mode {
51 PB_ISOLATE_MODE_MEM_OFFLINE,
52 PB_ISOLATE_MODE_CMA_ALLOC,
53 PB_ISOLATE_MODE_OTHER,
54};
55
56void __meminit init_pageblock_migratetype(struct page *page,
57 enum migratetype migratetype,
58 bool isolate);
59
60bool pageblock_isolate_and_move_free_pages(struct zone *zone, struct page *page);
61bool pageblock_unisolate_and_move_free_pages(struct zone *zone, struct page *page);
62
63int start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
64 enum pb_isolate_mode mode);
65
66void undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn);
67
68int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn,
69 enum pb_isolate_mode mode);
70#endif