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Diffstat (limited to '')
| -rw-r--r-- | include/xen/balloon.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/include/xen/balloon.h b/include/xen/balloon.h new file mode 100644 index 000000000..4914b93a2 --- /dev/null +++ b/include/xen/balloon.h @@ -0,0 +1,46 @@ +/* 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 |