| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * Xen balloon functionality |
| 3 | */ |
| 4 | |
| 5 | #define RETRY_UNLIMITED 0 |
| 6 | |
| 7 | struct balloon_stats { |
| 8 | /* We aim for 'current allocation' == 'target allocation'. */ |
| 9 | unsigned long current_pages; |
| 10 | unsigned long target_pages; |
| 11 | /* Number of pages in high- and low-memory balloons. */ |
| 12 | unsigned long balloon_low; |
| 13 | unsigned long balloon_high; |
| 14 | unsigned long schedule_delay; |
| 15 | unsigned long max_schedule_delay; |
| 16 | unsigned long retry_count; |
| 17 | unsigned long max_retry_count; |
| 18 | #ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG |
| 19 | unsigned long hotplug_pages; |
| 20 | unsigned long balloon_hotplug; |
| 21 | #endif |
| 22 | }; |
| 23 | |
| 24 | extern struct balloon_stats balloon_stats; |
| 25 | |
| 26 | void balloon_set_new_target(unsigned long target); |
| 27 | |
| 28 | int alloc_xenballooned_pages(int nr_pages, struct page **pages, |
| 29 | bool highmem); |
| 30 | void free_xenballooned_pages(int nr_pages, struct page **pages); |
| 31 | |
| 32 | struct device; |
| 33 | #ifdef CONFIG_XEN_SELFBALLOONING |
| 34 | extern int register_xen_selfballooning(struct device *dev); |
| 35 | #else |
| 36 | static inline int register_xen_selfballooning(struct device *dev) |
| 37 | { |
| 38 | return -ENOSYS; |
| 39 | } |
| 40 | #endif |