Merge tag 'driver-core-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
[sfrench/cifs-2.6.git] / include / xen / balloon.h
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
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