Cregit: balloon.h

Contributors: 8
Author	Tokens	Token Proportion	Commits	Commit Proportion
Daniel De Graaf	57	34.34%	1	11.11%
Dan Magenheimer	31	18.67%	1	11.11%
Konrad Rzeszutek Wilk	26	15.66%	1	11.11%
Juergen Gross	21	12.65%	1	11.11%
Boris Ostrovsky	17	10.24%	1	11.11%
David Vrabel	8	4.82%	2	22.22%
Kay Sievers	5	3.01%	1	11.11%
Greg Kroah-Hartman	1	0.60%	1	11.11%
Total	166		9

/* SPDX-License-Identifier: GPL-2.0 */
/******************************************************************************
 * Xen balloon functionality
 */

#define RETRY_UNLIMITED	0

struct balloon_stats {
	/* We aim for 'current allocation' == 'target allocation'. */
	unsigned long current_pages;
	unsigned long target_pages;
	unsigned long target_unpopulated;
	/* Number of pages in high- and low-memory balloons. */
	unsigned long balloon_low;
	unsigned long balloon_high;
	unsigned long total_pages;
	unsigned long schedule_delay;
	unsigned long max_schedule_delay;
	unsigned long retry_count;
	unsigned long max_retry_count;
};

extern struct balloon_stats balloon_stats;

void balloon_set_new_target(unsigned long target);

int alloc_xenballooned_pages(int nr_pages, struct page **pages);
void free_xenballooned_pages(int nr_pages, struct page **pages);

struct device;
#ifdef CONFIG_XEN_SELFBALLOONING
extern int register_xen_selfballooning(struct device *dev);
#else
static inline int register_xen_selfballooning(struct device *dev)
{
	return -ENOSYS;
}
#endif

#ifdef CONFIG_XEN_BALLOON
void xen_balloon_init(void);
#else
static inline void xen_balloon_init(void)
{
}
#endif

#ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
struct resource;
void arch_xen_balloon_init(struct resource *hostmem_resource);
#endif