1/******************************************************************************
 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;
18#ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
19	unsigned long hotplug_pages;
20	unsigned long balloon_hotplug;
21#endif
22};
23
24extern struct balloon_stats balloon_stats;
25
26void balloon_set_new_target(unsigned long target);
27
28int alloc_xenballooned_pages(int nr_pages, struct page** pages);
29void free_xenballooned_pages(int nr_pages, struct page** pages);
30
31struct sys_device;
32#ifdef CONFIG_XEN_SELFBALLOONING
33extern int register_xen_selfballooning(struct sys_device *sysdev);
34#else
35static inline int register_xen_selfballooning(struct sys_device *sysdev)
36{
37	return -ENOSYS;
38}
39#endif

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/******************************************************************************
 3 * Xen balloon functionality
 4 */
 5#ifndef _XEN_BALLOON_H
 6#define _XEN_BALLOON_H
 7
 8#define RETRY_UNLIMITED	0
 9
10struct balloon_stats {
11	/* We aim for 'current allocation' == 'target allocation'. */
12	unsigned long current_pages;
13	unsigned long target_pages;
14	unsigned long target_unpopulated;
15	/* Number of pages in high- and low-memory balloons. */
16	unsigned long balloon_low;
17	unsigned long balloon_high;
18	unsigned long total_pages;
19	unsigned long schedule_delay;
20	unsigned long max_schedule_delay;
21	unsigned long retry_count;
22	unsigned long max_retry_count;
 
 
 
 
23};
24
25extern struct balloon_stats balloon_stats;
26
27void balloon_set_new_target(unsigned long target);
28
29int xen_alloc_ballooned_pages(unsigned int nr_pages, struct page **pages);
30void xen_free_ballooned_pages(unsigned int nr_pages, struct page **pages);
31
32#ifdef CONFIG_XEN_BALLOON
33void xen_balloon_init(void);
 
34#else
35static inline void xen_balloon_init(void)
36{
 
37}
38#endif
39
40#endif	/* _XEN_BALLOON_H */