X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/d7e50217d7adf6e52786a38bcaa4cd698cb9a79e..c3c9b80d004dbbfdf763edeb97968c6997e3b45b:/osfmk/vm/vm_init.c diff --git a/osfmk/vm/vm_init.c b/osfmk/vm/vm_init.c index 26bd959e5..11ef72463 100644 --- 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 - * 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, @@ -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. - * - * @APPLE_LICENSE_HEADER_END@ + * + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ */ -/* +/* * 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. - * + * * 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 - * + * * 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. */ @@ -61,8 +64,11 @@ */ #include -#include -#include +#include +#include +#include +#include +#include #include #include #include @@ -71,58 +77,99 @@ #include #include -#define ZONE_MAP_MIN (12 * 1024 * 1024) -#define ZONE_MAP_MAX (256 * 1024 * 1024) +#include + +#include + +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. */ - +__startup_func 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. */ - + vm_mem_bootstrap_log("vm_page_bootstrap"); vm_page_bootstrap(&start, &end); /* * Initialize other VM packages */ + vm_mem_bootstrap_log("zone_bootstrap"); zone_bootstrap(); + + vm_mem_bootstrap_log("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_mem_bootstrap_log("kmem_init"); kmem_init(start, end); - pmap_init(); - - if (PE_parse_boot_arg("zsize", &zsize)) - zsize = zsize * 1024 * 1024; - else { - zsize = sane_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_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"); + } }