| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | /****************************************************************************** |
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| 3 | * Xen balloon functionality |
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| 4 | */ |
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| 5 | #ifndef _XEN_BALLOON_H |
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| 6 | #define _XEN_BALLOON_H |
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| 7 | |
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| 8 | #define RETRY_UNLIMITED 0 |
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| 9 | |
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| 10 | struct balloon_stats { |
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| 11 | /* We aim for 'current allocation' == 'target allocation'. */ |
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| 12 | unsigned long current_pages; |
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| 13 | unsigned long target_pages; |
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| 14 | unsigned long target_unpopulated; |
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| 15 | /* Number of pages in high- and low-memory balloons. */ |
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| 16 | unsigned long balloon_low; |
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| 17 | unsigned long balloon_high; |
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| 18 | unsigned long total_pages; |
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| 19 | unsigned long schedule_delay; |
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| 20 | unsigned long max_schedule_delay; |
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| 21 | unsigned long retry_count; |
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| 22 | unsigned long max_retry_count; |
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| 23 | }; |
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| 24 | |
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| 25 | extern struct balloon_stats balloon_stats; |
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| 26 | |
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| 27 | void balloon_set_new_target(unsigned long target); |
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| 28 | |
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| 29 | int xen_alloc_ballooned_pages(unsigned int nr_pages, struct page **pages); |
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| 30 | void xen_free_ballooned_pages(unsigned int nr_pages, struct page **pages); |
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| 31 | |
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| 32 | #ifdef CONFIG_XEN_BALLOON |
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| 33 | void xen_balloon_init(void); |
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| 34 | #else |
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| 35 | static inline void xen_balloon_init(void) |
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| 36 | { |
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| 37 | } |
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| 38 | #endif |
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| 39 | |
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| 40 | #endif /* _XEN_BALLOON_H */ |
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| 41 | |
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