diff options
Diffstat (limited to 'include/xen/balloon.h')
| -rw-r--r-- | include/xen/balloon.h | 86 |
1 files changed, 34 insertions, 52 deletions
diff --git a/include/xen/balloon.h b/include/xen/balloon.h index fe43b0f3c86..a4c1c6a9369 100644 --- a/include/xen/balloon.h +++ b/include/xen/balloon.h @@ -1,61 +1,43 @@ /****************************************************************************** - * balloon.h - * - * Xen balloon driver - enables returning/claiming memory to/from Xen. - * - * Copyright (c) 2003, B Dragovic - * Copyright (c) 2003-2004, M Williamson, K Fraser - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation; or, when distributed - * separately from the Linux kernel or incorporated into other - * software packages, subject to the following license: - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this source file (the "Software"), to deal in the Software without - * restriction, including without limitation the rights to use, copy, modify, - * merge, publish, distribute, sublicense, and/or sell copies of the Software, - * and to permit persons to whom the Software is furnished to do so, subject to - * the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS - * IN THE SOFTWARE. + * Xen balloon functionality */ -#ifndef __XEN_BALLOON_H__ -#define __XEN_BALLOON_H__ +#define RETRY_UNLIMITED 0 -#include <linux/spinlock.h> +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 +}; -#if 0 -/* - * Inform the balloon driver that it should allow some slop for device-driver - * memory activities. - */ -void balloon_update_driver_allowance(long delta); +extern struct balloon_stats balloon_stats; -/* Allocate/free a set of empty pages in low memory (i.e., no RAM mapped). */ -struct page **alloc_empty_pages_and_pagevec(int nr_pages); -void free_empty_pages_and_pagevec(struct page **pagevec, int nr_pages); +void balloon_set_new_target(unsigned long target); -void balloon_release_driver_page(struct page *page); +int alloc_xenballooned_pages(int nr_pages, struct page **pages, + bool highmem); +void free_xenballooned_pages(int nr_pages, struct page **pages); -/* - * Prevent the balloon driver from changing the memory reservation during - * a driver critical region. - */ -extern spinlock_t balloon_lock; -#define balloon_lock(__flags) spin_lock_irqsave(&balloon_lock, __flags) -#define balloon_unlock(__flags) spin_unlock_irqrestore(&balloon_lock, __flags) -#endif +struct page *get_balloon_scratch_page(void); +void put_balloon_scratch_page(void); -#endif /* __XEN_BALLOON_H__ */ +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 |