1 /*
2 * Copyright (c) 2000-2020 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28 /*
29 * @OSF_COPYRIGHT@
30 */
31 /*
32 * Mach Operating System
33 * Copyright (c) 1991,1990,1989 Carnegie Mellon University
34 * All Rights Reserved.
35 *
36 * Permission to use, copy, modify and distribute this software and its
37 * documentation is hereby granted, provided that both the copyright
38 * notice and this permission notice appear in all copies of the
39 * software, derivative works or modified versions, and any portions
40 * thereof, and that both notices appear in supporting documentation.
41 *
42 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
43 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
44 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
45 *
46 * Carnegie Mellon requests users of this software to return to
47 *
48 * Software Distribution Coordinator or [email protected]
49 * School of Computer Science
50 * Carnegie Mellon University
51 * Pittsburgh PA 15213-3890
52 *
53 * any improvements or extensions that they make and grant Carnegie Mellon
54 * the rights to redistribute these changes.
55 */
56 /*
57 * NOTICE: This file was modified by McAfee Research in 2004 to introduce
58 * support for mandatory and extensible security protections. This notice
59 * is included in support of clause 2.2 (b) of the Apple Public License,
60 * Version 2.0.
61 * Copyright (c) 2005 SPARTA, Inc.
62 */
63 /*
64 */
65 /*
66 * File: ipc/ipc_init.c
67 * Author: Rich Draves
68 * Date: 1989
69 *
70 * Functions to initialize the IPC system.
71 */
72
73 #include <mach/port.h>
74 #include <mach/message.h>
75 #include <mach/kern_return.h>
76
77 #include <kern/kern_types.h>
78 #include <kern/arcade.h>
79 #include <kern/kalloc.h>
80 #include <kern/simple_lock.h>
81 #include <kern/mach_param.h>
82 #include <kern/ipc_host.h>
83 #include <kern/ipc_kobject.h>
84 #include <kern/ipc_mig.h>
85 #include <kern/host_notify.h>
86 #include <kern/misc_protos.h>
87 #include <kern/sync_sema.h>
88 #include <kern/ux_handler.h>
89 #include <vm/vm_map_xnu.h>
90 #include <vm/vm_kern_xnu.h>
91
92 #include <ipc/ipc_entry.h>
93 #include <ipc/ipc_space.h>
94 #include <ipc/ipc_object.h>
95 #include <ipc/ipc_port.h>
96 #include <ipc/ipc_pset.h>
97 #include <ipc/ipc_notify.h>
98 #include <ipc/ipc_kmsg.h>
99 #include <ipc/ipc_hash.h>
100 #include <ipc/ipc_voucher.h>
101 #include <ipc/ipc_eventlink.h>
102
103 #include <mach/machine/ndr_def.h> /* NDR_record */
104
105 SECURITY_READ_ONLY_LATE(vm_map_t) ipc_kernel_map;
106
107 /* values to limit physical copy out-of-line memory descriptors */
108 SECURITY_READ_ONLY_LATE(vm_map_t) ipc_kernel_copy_map;
109 #define IPC_KERNEL_COPY_MAP_SIZE (8 * 1024 * 1024)
110 const vm_size_t ipc_kmsg_max_vm_space = ((IPC_KERNEL_COPY_MAP_SIZE * 7) / 8);
111
112 #define IPC_KERNEL_MAP_SIZE (CONFIG_IPC_KERNEL_MAP_SIZE << 20)
113
114 LCK_GRP_DECLARE(ipc_lck_grp, "ipc");
115 LCK_ATTR_DECLARE(ipc_lck_attr, 0, 0);
116
117 /*
118 * As an optimization, 'small' out of line data regions using a
119 * physical copy strategy are copied into kalloc'ed buffers.
120 * The value of 'small' is determined here. Requests kalloc()
121 * with sizes greater than msg_ool_size_small may fail.
122 */
123 const vm_size_t msg_ool_size_small = KHEAP_MAX_SIZE;
124 __startup_data
125 static struct mach_vm_range ipc_kernel_range;
126 __startup_data
127 static struct mach_vm_range ipc_kernel_copy_range;
128 KMEM_RANGE_REGISTER_STATIC(ipc_kernel_map, &ipc_kernel_range,
129 IPC_KERNEL_MAP_SIZE);
130 KMEM_RANGE_REGISTER_STATIC(ipc_kernel_copy_map, &ipc_kernel_copy_range,
131 IPC_KERNEL_COPY_MAP_SIZE);
132
133 /*
134 * Routine: ipc_init
135 * Purpose:
136 * Final initialization
137 */
138 __startup_func
139 static void
ipc_init(void)140 ipc_init(void)
141 {
142 /* create special spaces */
143
144 ipc_space_kernel = ipc_space_create_special();
145 ipc_space_reply = ipc_space_create_special();
146
147 /* initialize modules with hidden data structures */
148
149 #if CONFIG_ARCADE
150 arcade_init();
151 #endif
152
153 ipc_kernel_map = kmem_suballoc(kernel_map, &ipc_kernel_range.min_address,
154 IPC_KERNEL_MAP_SIZE, VM_MAP_CREATE_PAGEABLE,
155 VM_FLAGS_FIXED | VM_FLAGS_OVERWRITE, KMS_PERMANENT | KMS_NOFAIL,
156 VM_KERN_MEMORY_IPC).kmr_submap;
157
158 ipc_kernel_copy_map = kmem_suballoc(kernel_map, &ipc_kernel_copy_range.min_address,
159 IPC_KERNEL_COPY_MAP_SIZE,
160 VM_MAP_CREATE_PAGEABLE | VM_MAP_CREATE_DISABLE_HOLELIST,
161 VM_FLAGS_FIXED | VM_FLAGS_OVERWRITE, KMS_PERMANENT | KMS_NOFAIL,
162 VM_KERN_MEMORY_IPC).kmr_submap;
163
164 ipc_kernel_copy_map->no_zero_fill = TRUE;
165 ipc_kernel_copy_map->wait_for_space = TRUE;
166
167 ipc_host_init();
168 ux_handler_init();
169 }
170 #ifndef __BUILDING_XNU_LIB_UNITTEST__ /* unittests don't support creating submap in kernel_map */
171 STARTUP(MACH_IPC, STARTUP_RANK_LAST, ipc_init);
172 #endif /* __BUILDING_XNU_LIB_UNITTEST__ */
173