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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_PAGEISOLATION_H
#define __LINUX_PAGEISOLATION_H
#ifdef CONFIG_MEMORY_ISOLATION
static inline bool is_migrate_isolate_page(struct page *page)
{
return get_pageblock_migratetype(page) == MIGRATE_ISOLATE;
}
static inline bool is_migrate_isolate(int migratetype)
{
return migratetype == MIGRATE_ISOLATE;
}
#define get_pageblock_isolate(page) \
get_pfnblock_bit(page, page_to_pfn(page), PB_migrate_isolate)
#define clear_pageblock_isolate(page) \
clear_pfnblock_bit(page, page_to_pfn(page), PB_migrate_isolate)
#define set_pageblock_isolate(page) \
set_pfnblock_bit(page, page_to_pfn(page), PB_migrate_isolate)
#else
static inline bool is_migrate_isolate_page(struct page *page)
{
return false;
}
static inline bool is_migrate_isolate(int migratetype)
{
return false;
}
static inline bool get_pageblock_isolate(struct page *page)
{
return false;
}
static inline void clear_pageblock_isolate(struct page *page)
{
}
static inline void set_pageblock_isolate(struct page *page)
{
}
#endif
/*
* Pageblock isolation modes:
* PB_ISOLATE_MODE_MEM_OFFLINE - isolate to offline (!allocate) memory
* e.g., skip over PageHWPoison() pages and
* PageOffline() pages. Unmovable pages will be
* reported in this mode.
* PB_ISOLATE_MODE_CMA_ALLOC - isolate for CMA allocations
* PB_ISOLATE_MODE_OTHER - isolate for other purposes
*/
enum pb_isolate_mode {
PB_ISOLATE_MODE_MEM_OFFLINE,
PB_ISOLATE_MODE_CMA_ALLOC,
PB_ISOLATE_MODE_OTHER,
};
void __meminit init_pageblock_migratetype(struct page *page,
enum migratetype migratetype,
bool isolate);
bool pageblock_isolate_and_move_free_pages(struct zone *zone, struct page *page);
bool pageblock_unisolate_and_move_free_pages(struct zone *zone, struct page *page);
int start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
enum pb_isolate_mode mode);
void undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn);
int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn,
enum pb_isolate_mode mode);
#endif
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