Initial import

1 files changed, 43 insertions, 0 deletions

diff --git a/include/xen/balloon.h b/include/xen/balloon.h
new file mode 100644
index 000000000..a4c1c6a93
--- /dev/null
+++ b/include/xen/balloon.h
@@ -0,0 +1,43 @@
+/******************************************************************************
+ * 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