ldoms.h revision 11833:3b3fe296598b 
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 2010 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#ifndef	_LDOMS_H
28#define	_LDOMS_H
29
30#ifdef	__cplusplus
31extern "C" {
32#endif
33
34#include <sys/param.h>
35
36/*
37 * Global LDoms definitions.
38 */
39
40/*
41 * LDOMS_MAX_DOMAINS refers to the maximum theoretical number of
42 * domains supported by Solaris based on per-domain resources that
43 * are allocated. The actual number of domains supported by a
44 * platform is defined by the firmware.
45 *
46 * When adjusting this value please ensure that resources such
47 * as the following are approriately scaled:
48 *    - channel nexus interrupt cookies
49 *    - domain services ports
50 *    - NCPUS
51 *    - etc...
52 */
53#define	LDOMS_MAX_DOMAINS	512
54
55/* maximum number of characters in the logical domain name */
56#define	LDOMS_MAX_NAME_LEN	MAXNAMELEN
57
58/*
59 * Global flags that indicate what domaining features are
60 * available, if any. The value is set at boot time based on
61 * the value of the 'domaining-enabled' property in the MD
62 * and the global override flag 'force_domaining_disabled'.
63 * Updates to this variable after boot are not supported.
64 */
65extern uint_t domaining_capabilities;
66
67/* values for domaining_capabilities word (above) */
68#define	DOMAINING_SUPPORTED	0x1
69#define	DOMAINING_ENABLED	0x2
70
71#define	domaining_supported()						\
72	((domaining_capabilities & DOMAINING_SUPPORTED) != 0)
73#define	domaining_enabled()						\
74	((domaining_capabilities & DOMAINING_ENABLED) != 0)
75
76
77#ifdef	__cplusplus
78}
79#endif
80
81#endif	/* _LDOMS_H */
82