xref: /illumos-gate/usr/src/uts/i86xpv/sys/balloon.h (revision 51396a8ee7fb52fe0ab33bfe7b4f495ad431904a)
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 #pragma ident	"%Z%%M%	%I%	%E% SMI"
31 
32 #ifdef __cplusplus
33 extern "C" {
34 #endif
35 
36 #define	BALLOON_DEV_NAME	"balloon"
37 #define	BALLOON_PATHNAME	"xen/" BALLOON_DEV_NAME
38 
39 #define	BALLOON_DRIVER_NAME	"balloon"
40 
41 #define	BLN_IOCTL_BASE		('B' << 24) | ('A' << 16)
42 
43 /*
44  * To return the desired value.  These defines are copied in balloon.py
45  * in the hypervisor gate, so woe befall anyone who changes these.
46  */
47 #define	BLN_IOCTL_CURRENT	(BLN_IOCTL_BASE | 0x1)
48 #define	BLN_IOCTL_TARGET	(BLN_IOCTL_BASE | 0x2)
49 #define	BLN_IOCTL_LOW		(BLN_IOCTL_BASE | 0x3)
50 #define	BLN_IOCTL_HIGH		(BLN_IOCTL_BASE | 0x4)
51 #define	BLN_IOCTL_LIMIT		(BLN_IOCTL_BASE | 0x5)
52 
53 #ifdef __cplusplus
54 }
55 #endif
56 
57 #endif /* _SYS_BALLOON_H */
58