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-rw-r--r--include/xen/balloon.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/include/xen/balloon.h b/include/xen/balloon.h
new file mode 100644
index 000000000..f78a6cc94
--- /dev/null
+++ b/include/xen/balloon.h
@@ -0,0 +1,40 @@
+/* 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 xen_alloc_ballooned_pages(unsigned int nr_pages, struct page **pages);
+void xen_free_ballooned_pages(unsigned 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 */