linux/include/xen/balloon.h
Roger Pau Monne aecb2016c9 xen/balloon: add header guard
In order to protect against the header being included multiple times
on the same compilation unit.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20200901083326.21264-2-roger.pau@citrix.com
Signed-off-by: Juergen Gross <jgross@suse.com>
2020-09-04 09:59:53 +02:00

41 lines
1.0 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/******************************************************************************
* Xen balloon functionality
*/
#ifndef _XEN_BALLOON_H
#define _XEN_BALLOON_H
#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);
#ifdef CONFIG_XEN_BALLOON
void xen_balloon_init(void);
#else
static inline void xen_balloon_init(void)
{
}
#endif
#endif /* _XEN_BALLOON_H */