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 */
 
 
 

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/******************************************************************************
 3 * Xen balloon functionality
 4 */
 
 
 5
 6#define RETRY_UNLIMITED	0
 7
 8struct 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
23extern struct balloon_stats balloon_stats;
24
25void balloon_set_new_target(unsigned long target);
26
27int alloc_xenballooned_pages(int nr_pages, struct page **pages);
28void free_xenballooned_pages(int nr_pages, struct page **pages);
29
30struct device;
31#ifdef CONFIG_XEN_SELFBALLOONING
32extern int register_xen_selfballooning(struct device *dev);
33#else
34static inline int register_xen_selfballooning(struct device *dev)
35{
36	return -ENOSYS;
37}
38#endif
39
40#ifdef CONFIG_XEN_BALLOON
41void xen_balloon_init(void);
42#else
43static inline void xen_balloon_init(void)
44{
45}
46#endif
47
48#ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
49struct resource;
50void arch_xen_balloon_init(struct resource *hostmem_resource);
51#endif