xref: /illumos-gate/usr/src/uts/sun4v/sys/ldoms.h (revision 82629e30)
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
31 extern "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  */
65 extern 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