xnu-7195.101.1.tar.gz

[apple/xnu.git] / osfmk / vm / vm_init.c

diff --git a/osfmk/vm/vm_init.c b/osfmk/vm/vm_init.c
index 37e0e6a75c878ed43ea22514229483424262476f..11ef72463244ff291528812a4fa511c984596745 100644 (file)
--- a/osfmk/vm/vm_init.c
+++ b/osfmk/vm/vm_init.c
@@ -1,17 +1,20 @@
 /*
 /*

- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2020 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

  *
  *

- * @APPLE_LICENSE_HEADER_START@
- * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
- * 

  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in

- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- * 
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *

  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,


@@ -19,34 +22,34 @@
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.

- * 
- * @APPLE_LICENSE_HEADER_END@
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@

  */
 /*
  * @OSF_COPYRIGHT@
  */
  */
 /*
  * @OSF_COPYRIGHT@
  */

-/* 
+/*

  * Mach Operating System
  * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
  * All Rights Reserved.
  * Mach Operating System
  * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
  * All Rights Reserved.

- * 
+ *

  * Permission to use, copy, modify and distribute this software and its
  * documentation is hereby granted, provided that both the copyright
  * notice and this permission notice appear in all copies of the
  * software, derivative works or modified versions, and any portions
  * thereof, and that both notices appear in supporting documentation.
  * Permission to use, copy, modify and distribute this software and its
  * documentation is hereby granted, provided that both the copyright
  * notice and this permission notice appear in all copies of the
  * software, derivative works or modified versions, and any portions
  * thereof, and that both notices appear in supporting documentation.

- * 
+ *

  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.

- * 
+ *

  * Carnegie Mellon requests users of this software to return to
  * Carnegie Mellon requests users of this software to return to

- * 
+ *

  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  *  School of Computer Science
  *  Carnegie Mellon University
  *  Pittsburgh PA 15213-3890
  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  *  School of Computer Science
  *  Carnegie Mellon University
  *  Pittsburgh PA 15213-3890

- * 
+ *

  * any improvements or extensions that they make and grant Carnegie Mellon
  * the rights to redistribute these changes.
  */
  * any improvements or extensions that they make and grant Carnegie Mellon
  * the rights to redistribute these changes.
  */


@@ -61,8 +64,11 @@
  */
 
 #include <mach/machine/vm_types.h>
  */
 
 #include <mach/machine/vm_types.h>

-#include <kern/zalloc.h>
-#include <kern/kalloc.h>
+#include <mach/vm_map.h>
+#include <kern/startup.h>
+#include <kern/zalloc_internal.h>
+#include <kern/kext_alloc.h>
+#include <sys/kdebug.h>

 #include <vm/vm_object.h>
 #include <vm/vm_map.h>
 #include <vm/vm_page.h>
 #include <vm/vm_object.h>
 #include <vm/vm_map.h>
 #include <vm/vm_page.h>


@@ -71,57 +77,99 @@
 #include <vm/vm_fault.h>
 #include <vm/vm_init.h>
 
 #include <vm/vm_fault.h>
 #include <vm/vm_init.h>
 

-#define ZONE_MAP_MIN (12 * 1024 * 1024) 
-#define ZONE_MAP_MAX (256 * 1024 * 1024) 
+#include <pexpert/pexpert.h>
+
+#include <vm/vm_protos.h>
+
+const vm_offset_t vm_min_kernel_address = VM_MIN_KERNEL_AND_KEXT_ADDRESS;
+const vm_offset_t vm_max_kernel_address = VM_MAX_KERNEL_ADDRESS;
+
+TUNABLE(bool, iokit_iomd_setownership_enabled,
+    "iokit_iomd_setownership_enabled", true);
+
+static inline void
+vm_mem_bootstrap_log(const char *message)
+{
+//     kprintf("vm_mem_bootstrap: %s\n", message);
+       kernel_debug_string_early(message);
+}

 
 /*
  *     vm_mem_bootstrap initializes the virtual memory system.
  *     This is done only by the first cpu up.
  */
 
 /*
  *     vm_mem_bootstrap initializes the virtual memory system.
  *     This is done only by the first cpu up.
  */

-
+__startup_func

 void
 vm_mem_bootstrap(void)
 {
 void
 vm_mem_bootstrap(void)
 {

-       vm_offset_t     start, end;
-       vm_size_t zsize;
+       vm_offset_t start, end, kmapoff_kaddr;

 
        /*
         *      Initializes resident memory structures.
         *      From here on, all physical memory is accounted for,
         *      and we use only virtual addresses.
         */
 
        /*
         *      Initializes resident memory structures.
         *      From here on, all physical memory is accounted for,
         *      and we use only virtual addresses.
         */

-
+       vm_mem_bootstrap_log("vm_page_bootstrap");

        vm_page_bootstrap(&start, &end);
 
        /*
         *      Initialize other VM packages
         */
 
        vm_page_bootstrap(&start, &end);
 
        /*
         *      Initialize other VM packages
         */
 

+       vm_mem_bootstrap_log("zone_bootstrap");

        zone_bootstrap();
        zone_bootstrap();

+
+       vm_mem_bootstrap_log("vm_object_bootstrap");

        vm_object_bootstrap();
        vm_object_bootstrap();

+
+       vm_retire_boot_pages();
+
+       kernel_startup_initialize_upto(STARTUP_SUB_VM_KERNEL);
+
+       vm_mem_bootstrap_log("vm_map_init");

        vm_map_init();
        vm_map_init();

+
+       vm_mem_bootstrap_log("kmem_init");

        kmem_init(start, end);
        kmem_init(start, end);

-       pmap_init();
-       
-       if (PE_parse_boot_arg("zsize", &zsize))
-               zsize = zsize * 1024 * 1024;
-       else {
-               zsize = mem_size >> 2;                  /* Get target zone size as 1/4 of physical memory */
+
+       kernel_startup_initialize_upto(STARTUP_SUB_KMEM);
+
+       /*
+        * Eat a random amount of kernel_map to fuzz subsequent heap, zone and
+        * stack addresses. (With a 4K page and 9 bits of randomness, this
+        * eats about 2M of VA from the map)
+        *
+        * Note that we always need to slide by at least one page because the VM
+        * pointer packing schemes using KERNEL_PMAP_HEAP_RANGE_START as a base
+        * do not admit this address to be part of any zone submap.
+        */
+       uint32_t kmapoff_pgcnt = (early_random() & 0x1ff) + 1; /* 9 bits */
+       if (kernel_memory_allocate(kernel_map, &kmapoff_kaddr,
+           ptoa(kmapoff_pgcnt), 0, KMA_KOBJECT | KMA_PERMANENT | KMA_VAONLY,
+           VM_KERN_MEMORY_OSFMK) != KERN_SUCCESS) {
+               panic("cannot kernel_memory_allocate %u pages", kmapoff_pgcnt);

        }
        }

-       if(zsize < ZONE_MAP_MIN) zsize = ZONE_MAP_MIN;  /* Clamp to min */
-       if(zsize > ZONE_MAP_MAX) zsize = ZONE_MAP_MAX;  /* Clamp to max */
-       zone_init(zsize);                                               /* Allocate address space for zones */
-       
-       kalloc_init();
+
+       vm_mem_bootstrap_log("pmap_init");
+       pmap_init();
+
+       kernel_startup_initialize_upto(STARTUP_SUB_KMEM_ALLOC);
+
+       vm_mem_bootstrap_log("vm_fault_init");

        vm_fault_init();
        vm_fault_init();

-       vm_page_module_init();
-       memory_manager_default_init();
-       memory_object_control_bootstrap();
-       device_pager_bootstrap();
-}

 
 

-void
-vm_mem_init(void)
-{
-       vm_object_init();
+       vm_mem_bootstrap_log("kext_alloc_init");
+       kext_alloc_init();
+
+       kernel_startup_initialize_upto(STARTUP_SUB_ZALLOC);
+
+       vm_paging_map_init();
+
+       vm_page_delayed_work_init_ctx();
+
+       if (iokit_iomd_setownership_enabled) {
+               kprintf("IOKit IOMD setownership ENABLED\n");
+       } else {
+               kprintf("IOKit IOMD setownership DISABLED\n");
+       }

 }
 }