| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /****************************************************************************** |
| 3 | * Xen balloon functionality |
| 4 | */ |
| 5 | |
| 6 | #define RETRY_UNLIMITED 0 |
| 7 | |
| 8 | struct balloon_stats { |
| 9 | /* We aim for 'current allocation' == 'target allocation'. */ |
| 10 | unsigned long current_pages; |
| 11 | unsigned long target_pages; |
| 12 | unsigned long target_unpopulated; |
| 13 | /* Number of pages in high- and low-memory balloons. */ |
| 14 | unsigned long balloon_low; |
| 15 | unsigned long balloon_high; |
| 16 | unsigned long total_pages; |
| 17 | unsigned long schedule_delay; |
| 18 | unsigned long max_schedule_delay; |
| 19 | unsigned long retry_count; |
| 20 | unsigned long max_retry_count; |
| 21 | }; |
| 22 | |
| 23 | extern struct balloon_stats balloon_stats; |
| 24 | |
| 25 | void balloon_set_new_target(unsigned long target); |
| 26 | |
| 27 | int alloc_xenballooned_pages(int nr_pages, struct page **pages); |
| 28 | void free_xenballooned_pages(int nr_pages, struct page **pages); |
| 29 | |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 30 | #ifdef CONFIG_XEN_BALLOON |
| 31 | void xen_balloon_init(void); |
| 32 | #else |
| 33 | static inline void xen_balloon_init(void) |
| 34 | { |
| 35 | } |
| 36 | #endif |