| Daniel De Graaf | 803eb04 | 2011-03-14 11:29:37 -0400 | [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; |
| Daniel Kiper | 080e2be | 2011-07-25 17:12:06 -0700 | [diff] [blame] | 18 | #ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG |
| 19 | unsigned long hotplug_pages; |
| 20 | unsigned long balloon_hotplug; |
| 21 | #endif |
| Daniel De Graaf | 803eb04 | 2011-03-14 11:29:37 -0400 | [diff] [blame] | 22 | }; |
| 23 | |
| 24 | extern struct balloon_stats balloon_stats; |
| 25 | |
| 26 | void balloon_set_new_target(unsigned long target); |
| Konrad Rzeszutek Wilk | b6f3067 | 2011-03-15 10:23:57 -0400 | [diff] [blame] | 27 | |
| Stefano Stabellini | 693394b | 2011-09-29 11:57:55 +0100 | [diff] [blame] | 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); |
| Dan Magenheimer | a50777c | 2011-07-08 12:26:21 -0600 | [diff] [blame] | 31 | |
| Stefano Stabellini | cd9151e | 2013-08-04 15:39:40 +0100 | [diff] [blame] | 32 | struct page *get_balloon_scratch_page(void); |
| 33 | void put_balloon_scratch_page(void); |
| 34 | |
| Kay Sievers | 0706802 | 2011-12-14 15:32:50 -0800 | [diff] [blame] | 35 | struct device; |
| Dan Magenheimer | a50777c | 2011-07-08 12:26:21 -0600 | [diff] [blame] | 36 | #ifdef CONFIG_XEN_SELFBALLOONING |
| Kay Sievers | 0706802 | 2011-12-14 15:32:50 -0800 | [diff] [blame] | 37 | extern int register_xen_selfballooning(struct device *dev); |
| Dan Magenheimer | a50777c | 2011-07-08 12:26:21 -0600 | [diff] [blame] | 38 | #else |
| Kay Sievers | 0706802 | 2011-12-14 15:32:50 -0800 | [diff] [blame] | 39 | static inline int register_xen_selfballooning(struct device *dev) |
| Dan Magenheimer | a50777c | 2011-07-08 12:26:21 -0600 | [diff] [blame] | 40 | { |
| 41 | return -ENOSYS; |
| 42 | } |
| 43 | #endif |