xref: /illumos-gate/usr/src/uts/i86xpv/sys/balloon.h (revision 7a6d80f1660abd4755c68cbd094d4a914681d26e)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #ifndef _SYS_BALLOON_H
28 #define	_SYS_BALLOON_H
29 
30 #ifdef __cplusplus
31 extern "C" {
32 #endif
33 
34 #define	BALLOON_DEV_NAME	"balloon"
35 #define	BALLOON_PATHNAME	"xen/" BALLOON_DEV_NAME
36 
37 #define	BALLOON_DRIVER_NAME	"balloon"
38 
39 #define	BLN_IOCTL_BASE		('B' << 24) | ('A' << 16)
40 
41 /*
42  * To return the desired value.  These defines are copied in balloon.py
43  * in the hypervisor gate, so woe befall anyone who changes these.
44  */
45 #define	BLN_IOCTL_CURRENT	(BLN_IOCTL_BASE | 0x1)
46 #define	BLN_IOCTL_TARGET	(BLN_IOCTL_BASE | 0x2)
47 #define	BLN_IOCTL_LOW		(BLN_IOCTL_BASE | 0x3)
48 #define	BLN_IOCTL_HIGH		(BLN_IOCTL_BASE | 0x4)
49 #define	BLN_IOCTL_LIMIT		(BLN_IOCTL_BASE | 0x5)
50 
51 #ifdef __cplusplus
52 }
53 #endif
54 
55 #endif /* _SYS_BALLOON_H */
56