blob: a4c1c6a93691a76ce5299c00b48564bd55912d24 [file] [log] [blame]
Daniel De Graaf803eb042011-03-14 11:29:37 -04001/******************************************************************************
2 * Xen balloon functionality
3 */
4
5#define RETRY_UNLIMITED 0
6
7struct 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 Kiper080e2be2011-07-25 17:12:06 -070018#ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
19 unsigned long hotplug_pages;
20 unsigned long balloon_hotplug;
21#endif
Daniel De Graaf803eb042011-03-14 11:29:37 -040022};
23
24extern struct balloon_stats balloon_stats;
25
26void balloon_set_new_target(unsigned long target);
Konrad Rzeszutek Wilkb6f30672011-03-15 10:23:57 -040027
Stefano Stabellini693394b2011-09-29 11:57:55 +010028int alloc_xenballooned_pages(int nr_pages, struct page **pages,
29 bool highmem);
30void free_xenballooned_pages(int nr_pages, struct page **pages);
Dan Magenheimera50777c2011-07-08 12:26:21 -060031
Stefano Stabellinicd9151e2013-08-04 15:39:40 +010032struct page *get_balloon_scratch_page(void);
33void put_balloon_scratch_page(void);
34
Kay Sievers07068022011-12-14 15:32:50 -080035struct device;
Dan Magenheimera50777c2011-07-08 12:26:21 -060036#ifdef CONFIG_XEN_SELFBALLOONING
Kay Sievers07068022011-12-14 15:32:50 -080037extern int register_xen_selfballooning(struct device *dev);
Dan Magenheimera50777c2011-07-08 12:26:21 -060038#else
Kay Sievers07068022011-12-14 15:32:50 -080039static inline int register_xen_selfballooning(struct device *dev)
Dan Magenheimera50777c2011-07-08 12:26:21 -060040{
41 return -ENOSYS;
42}
43#endif