mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-14 05:36:42 +07:00
62 lines
2.4 KiB
C
62 lines
2.4 KiB
C
|
/******************************************************************************
|
||
|
|
* 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __XEN_BALLOON_H__
|
||
|
|
#define __XEN_BALLOON_H__
|
||
|
|
|
||
|
|
#include <linux/spinlock.h>
|
||
|
|
|
||
|
|
#if 0
|
||
|
|
/*
|
||
|
|
* Inform the balloon driver that it should allow some slop for device-driver
|
||
|
|
* memory activities.
|
||
|
|
*/
|
||
|
|
void balloon_update_driver_allowance(long delta);
|
||
|
|
|
||
|
|
/* 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_release_driver_page(struct page *page);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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
|
||
|
|
|
||
|
|
#endif /* __XEN_BALLOON_H__ */
|