| /****************************************************************************** |
| * 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; |
| /* Number of pages in high- and low-memory balloons. */ |
| unsigned long balloon_low; |
| unsigned long balloon_high; |
| unsigned long schedule_delay; |
| unsigned long max_schedule_delay; |
| unsigned long retry_count; |
| unsigned long max_retry_count; |
| #ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG |
| unsigned long hotplug_pages; |
| unsigned long balloon_hotplug; |
| #endif |
| }; |
| |
| extern struct balloon_stats balloon_stats; |
| |
| void balloon_set_new_target(unsigned long target); |
| |
| int alloc_xenballooned_pages(int nr_pages, struct page **pages, |
| bool highmem); |
| void free_xenballooned_pages(int nr_pages, struct page **pages); |
| |
| struct page *get_balloon_scratch_page(void); |
| void put_balloon_scratch_page(void); |
| |
| 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 |
