Thomas Gleixner | 2874c5f | 2019-05-27 08:55:01 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 2 | /* |
| 3 | * Procedures for maintaining information about logical memory blocks. |
| 4 | * |
| 5 | * Peter Bergner, IBM Corp. June 2001. |
| 6 | * Copyright (C) 2001 Peter Bergner. |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | #include <linux/kernel.h> |
Benjamin Herrenschmidt | 142b45a7 | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 10 | #include <linux/slab.h> |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 11 | #include <linux/init.h> |
| 12 | #include <linux/bitops.h> |
Benjamin Herrenschmidt | 449e8df | 2010-07-06 15:39:07 -0700 | [diff] [blame] | 13 | #include <linux/poison.h> |
Benjamin Herrenschmidt | c196f76 | 2010-07-06 15:39:16 -0700 | [diff] [blame] | 14 | #include <linux/pfn.h> |
Benjamin Herrenschmidt | 6d03b88 | 2010-07-06 15:39:19 -0700 | [diff] [blame] | 15 | #include <linux/debugfs.h> |
Randy Dunlap | 514c603 | 2018-04-05 16:25:34 -0700 | [diff] [blame] | 16 | #include <linux/kmemleak.h> |
Benjamin Herrenschmidt | 6d03b88 | 2010-07-06 15:39:19 -0700 | [diff] [blame] | 17 | #include <linux/seq_file.h> |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 18 | #include <linux/memblock.h> |
| 19 | |
Christoph Hellwig | c4c5ad6 | 2016-07-28 15:48:06 -0700 | [diff] [blame] | 20 | #include <asm/sections.h> |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 21 | #include <linux/io.h> |
| 22 | |
| 23 | #include "internal.h" |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 24 | |
Ard Biesheuvel | 8a5b403d | 2019-02-15 13:33:32 +0100 | [diff] [blame] | 25 | #define INIT_MEMBLOCK_REGIONS 128 |
| 26 | #define INIT_PHYSMEM_REGIONS 4 |
| 27 | |
| 28 | #ifndef INIT_MEMBLOCK_RESERVED_REGIONS |
| 29 | # define INIT_MEMBLOCK_RESERVED_REGIONS INIT_MEMBLOCK_REGIONS |
| 30 | #endif |
| 31 | |
Mike Rapoport | 3e039c5 | 2018-06-30 17:55:05 +0300 | [diff] [blame] | 32 | /** |
| 33 | * DOC: memblock overview |
| 34 | * |
| 35 | * Memblock is a method of managing memory regions during the early |
| 36 | * boot period when the usual kernel memory allocators are not up and |
| 37 | * running. |
| 38 | * |
| 39 | * Memblock views the system memory as collections of contiguous |
| 40 | * regions. There are several types of these collections: |
| 41 | * |
| 42 | * * ``memory`` - describes the physical memory available to the |
| 43 | * kernel; this may differ from the actual physical memory installed |
| 44 | * in the system, for instance when the memory is restricted with |
| 45 | * ``mem=`` command line parameter |
| 46 | * * ``reserved`` - describes the regions that were allocated |
| 47 | * * ``physmap`` - describes the actual physical memory regardless of |
| 48 | * the possible restrictions; the ``physmap`` type is only available |
| 49 | * on some architectures. |
| 50 | * |
| 51 | * Each region is represented by :c:type:`struct memblock_region` that |
| 52 | * defines the region extents, its attributes and NUMA node id on NUMA |
| 53 | * systems. Every memory type is described by the :c:type:`struct |
| 54 | * memblock_type` which contains an array of memory regions along with |
| 55 | * the allocator metadata. The memory types are nicely wrapped with |
| 56 | * :c:type:`struct memblock`. This structure is statically initialzed |
| 57 | * at build time. The region arrays for the "memory" and "reserved" |
| 58 | * types are initially sized to %INIT_MEMBLOCK_REGIONS and for the |
| 59 | * "physmap" type to %INIT_PHYSMEM_REGIONS. |
Cao jin | 6e5af9a | 2019-11-30 17:56:21 -0800 | [diff] [blame] | 60 | * The memblock_allow_resize() enables automatic resizing of the region |
| 61 | * arrays during addition of new regions. This feature should be used |
| 62 | * with care so that memory allocated for the region array will not |
| 63 | * overlap with areas that should be reserved, for example initrd. |
Mike Rapoport | 3e039c5 | 2018-06-30 17:55:05 +0300 | [diff] [blame] | 64 | * |
| 65 | * The early architecture setup should tell memblock what the physical |
Cao jin | 6e5af9a | 2019-11-30 17:56:21 -0800 | [diff] [blame] | 66 | * memory layout is by using memblock_add() or memblock_add_node() |
| 67 | * functions. The first function does not assign the region to a NUMA |
| 68 | * node and it is appropriate for UMA systems. Yet, it is possible to |
| 69 | * use it on NUMA systems as well and assign the region to a NUMA node |
| 70 | * later in the setup process using memblock_set_node(). The |
| 71 | * memblock_add_node() performs such an assignment directly. |
Mike Rapoport | 3e039c5 | 2018-06-30 17:55:05 +0300 | [diff] [blame] | 72 | * |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 73 | * Once memblock is setup the memory can be allocated using one of the |
| 74 | * API variants: |
| 75 | * |
Cao jin | 6e5af9a | 2019-11-30 17:56:21 -0800 | [diff] [blame] | 76 | * * memblock_phys_alloc*() - these functions return the **physical** |
| 77 | * address of the allocated memory |
| 78 | * * memblock_alloc*() - these functions return the **virtual** address |
| 79 | * of the allocated memory. |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 80 | * |
| 81 | * Note, that both API variants use implict assumptions about allowed |
| 82 | * memory ranges and the fallback methods. Consult the documentation |
Cao jin | 6e5af9a | 2019-11-30 17:56:21 -0800 | [diff] [blame] | 83 | * of memblock_alloc_internal() and memblock_alloc_range_nid() |
| 84 | * functions for more elaborate description. |
Mike Rapoport | 3e039c5 | 2018-06-30 17:55:05 +0300 | [diff] [blame] | 85 | * |
Cao jin | 6e5af9a | 2019-11-30 17:56:21 -0800 | [diff] [blame] | 86 | * As the system boot progresses, the architecture specific mem_init() |
| 87 | * function frees all the memory to the buddy page allocator. |
Mike Rapoport | 3e039c5 | 2018-06-30 17:55:05 +0300 | [diff] [blame] | 88 | * |
Cao jin | 6e5af9a | 2019-11-30 17:56:21 -0800 | [diff] [blame] | 89 | * Unless an architecture enables %CONFIG_ARCH_KEEP_MEMBLOCK, the |
Mike Rapoport | 3e039c5 | 2018-06-30 17:55:05 +0300 | [diff] [blame] | 90 | * memblock data structures will be discarded after the system |
Cao jin | 6e5af9a | 2019-11-30 17:56:21 -0800 | [diff] [blame] | 91 | * initialization completes. |
Mike Rapoport | 3e039c5 | 2018-06-30 17:55:05 +0300 | [diff] [blame] | 92 | */ |
| 93 | |
Mike Rapoport | bda49a8 | 2018-10-30 15:09:40 -0700 | [diff] [blame] | 94 | #ifndef CONFIG_NEED_MULTIPLE_NODES |
| 95 | struct pglist_data __refdata contig_page_data; |
| 96 | EXPORT_SYMBOL(contig_page_data); |
| 97 | #endif |
| 98 | |
| 99 | unsigned long max_low_pfn; |
| 100 | unsigned long min_low_pfn; |
| 101 | unsigned long max_pfn; |
| 102 | unsigned long long max_possible_pfn; |
| 103 | |
Tejun Heo | fe091c2 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 104 | static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock; |
Ard Biesheuvel | 8a5b403d | 2019-02-15 13:33:32 +0100 | [diff] [blame] | 105 | static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_RESERVED_REGIONS] __initdata_memblock; |
Philipp Hachtmann | 70210ed | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 106 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
| 107 | static struct memblock_region memblock_physmem_init_regions[INIT_PHYSMEM_REGIONS] __initdata_memblock; |
| 108 | #endif |
Tejun Heo | fe091c2 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 109 | |
| 110 | struct memblock memblock __initdata_memblock = { |
| 111 | .memory.regions = memblock_memory_init_regions, |
| 112 | .memory.cnt = 1, /* empty dummy entry */ |
| 113 | .memory.max = INIT_MEMBLOCK_REGIONS, |
Heiko Carstens | 0262d9c | 2017-02-24 14:55:59 -0800 | [diff] [blame] | 114 | .memory.name = "memory", |
Tejun Heo | fe091c2 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 115 | |
| 116 | .reserved.regions = memblock_reserved_init_regions, |
| 117 | .reserved.cnt = 1, /* empty dummy entry */ |
Ard Biesheuvel | 8a5b403d | 2019-02-15 13:33:32 +0100 | [diff] [blame] | 118 | .reserved.max = INIT_MEMBLOCK_RESERVED_REGIONS, |
Heiko Carstens | 0262d9c | 2017-02-24 14:55:59 -0800 | [diff] [blame] | 119 | .reserved.name = "reserved", |
Tejun Heo | fe091c2 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 120 | |
Philipp Hachtmann | 70210ed | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 121 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
| 122 | .physmem.regions = memblock_physmem_init_regions, |
| 123 | .physmem.cnt = 1, /* empty dummy entry */ |
| 124 | .physmem.max = INIT_PHYSMEM_REGIONS, |
Heiko Carstens | 0262d9c | 2017-02-24 14:55:59 -0800 | [diff] [blame] | 125 | .physmem.name = "physmem", |
Philipp Hachtmann | 70210ed | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 126 | #endif |
| 127 | |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 128 | .bottom_up = false, |
Tejun Heo | fe091c2 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 129 | .current_limit = MEMBLOCK_ALLOC_ANYWHERE, |
| 130 | }; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 131 | |
Yinghai Lu | 10d0643 | 2010-07-28 15:43:02 +1000 | [diff] [blame] | 132 | int memblock_debug __initdata_memblock; |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 133 | static bool system_has_some_mirror __initdata_memblock = false; |
Tejun Heo | 1aadc05 | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 134 | static int memblock_can_resize __initdata_memblock; |
Gavin Shan | 181eb39 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 135 | static int memblock_memory_in_slab __initdata_memblock = 0; |
| 136 | static int memblock_reserved_in_slab __initdata_memblock = 0; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 137 | |
Mike Rapoport | c366ea8 | 2019-03-11 23:29:46 -0700 | [diff] [blame] | 138 | static enum memblock_flags __init_memblock choose_memblock_flags(void) |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 139 | { |
| 140 | return system_has_some_mirror ? MEMBLOCK_MIRROR : MEMBLOCK_NONE; |
| 141 | } |
| 142 | |
Tejun Heo | eb18f1b | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 143 | /* adjust *@size so that (@base + *@size) doesn't overflow, return new size */ |
| 144 | static inline phys_addr_t memblock_cap_size(phys_addr_t base, phys_addr_t *size) |
| 145 | { |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 146 | return *size = min(*size, PHYS_ADDR_MAX - base); |
Tejun Heo | eb18f1b | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 147 | } |
| 148 | |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 149 | /* |
| 150 | * Address comparison utilities |
| 151 | */ |
Yinghai Lu | 10d0643 | 2010-07-28 15:43:02 +1000 | [diff] [blame] | 152 | static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1, |
Benjamin Herrenschmidt | 2898cc4 | 2010-08-04 13:34:42 +1000 | [diff] [blame] | 153 | phys_addr_t base2, phys_addr_t size2) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 154 | { |
| 155 | return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); |
| 156 | } |
| 157 | |
Tang Chen | 95cf82e | 2015-09-08 15:02:03 -0700 | [diff] [blame] | 158 | bool __init_memblock memblock_overlaps_region(struct memblock_type *type, |
H Hartley Sweeten | 2d7d3eb | 2011-10-31 17:09:15 -0700 | [diff] [blame] | 159 | phys_addr_t base, phys_addr_t size) |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 160 | { |
| 161 | unsigned long i; |
| 162 | |
Alexander Kuleshov | f14516f | 2016-01-14 15:20:39 -0800 | [diff] [blame] | 163 | for (i = 0; i < type->cnt; i++) |
| 164 | if (memblock_addrs_overlap(base, size, type->regions[i].base, |
| 165 | type->regions[i].size)) |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 166 | break; |
Tang Chen | c5c5c9d | 2015-09-08 15:02:00 -0700 | [diff] [blame] | 167 | return i < type->cnt; |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 168 | } |
| 169 | |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 170 | /** |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 171 | * __memblock_find_range_bottom_up - find free area utility in bottom-up |
| 172 | * @start: start of candidate range |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 173 | * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or |
| 174 | * %MEMBLOCK_ALLOC_ACCESSIBLE |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 175 | * @size: size of free area to find |
| 176 | * @align: alignment of free area to find |
Grygorii Strashko | b115423 | 2014-01-21 15:50:16 -0800 | [diff] [blame] | 177 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 178 | * @flags: pick from blocks based on memory attributes |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 179 | * |
| 180 | * Utility called from memblock_find_in_range_node(), find free area bottom-up. |
| 181 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 182 | * Return: |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 183 | * Found address on success, 0 on failure. |
| 184 | */ |
| 185 | static phys_addr_t __init_memblock |
| 186 | __memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end, |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 187 | phys_addr_t size, phys_addr_t align, int nid, |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 188 | enum memblock_flags flags) |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 189 | { |
| 190 | phys_addr_t this_start, this_end, cand; |
| 191 | u64 i; |
| 192 | |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 193 | for_each_free_mem_range(i, nid, flags, &this_start, &this_end, NULL) { |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 194 | this_start = clamp(this_start, start, end); |
| 195 | this_end = clamp(this_end, start, end); |
| 196 | |
| 197 | cand = round_up(this_start, align); |
| 198 | if (cand < this_end && this_end - cand >= size) |
| 199 | return cand; |
| 200 | } |
| 201 | |
| 202 | return 0; |
| 203 | } |
| 204 | |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 205 | /** |
Tang Chen | 1402899 | 2013-11-12 15:07:57 -0800 | [diff] [blame] | 206 | * __memblock_find_range_top_down - find free area utility, in top-down |
| 207 | * @start: start of candidate range |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 208 | * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or |
| 209 | * %MEMBLOCK_ALLOC_ACCESSIBLE |
Tang Chen | 1402899 | 2013-11-12 15:07:57 -0800 | [diff] [blame] | 210 | * @size: size of free area to find |
| 211 | * @align: alignment of free area to find |
Grygorii Strashko | b115423 | 2014-01-21 15:50:16 -0800 | [diff] [blame] | 212 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 213 | * @flags: pick from blocks based on memory attributes |
Tang Chen | 1402899 | 2013-11-12 15:07:57 -0800 | [diff] [blame] | 214 | * |
| 215 | * Utility called from memblock_find_in_range_node(), find free area top-down. |
| 216 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 217 | * Return: |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 218 | * Found address on success, 0 on failure. |
Tang Chen | 1402899 | 2013-11-12 15:07:57 -0800 | [diff] [blame] | 219 | */ |
| 220 | static phys_addr_t __init_memblock |
| 221 | __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end, |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 222 | phys_addr_t size, phys_addr_t align, int nid, |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 223 | enum memblock_flags flags) |
Tang Chen | 1402899 | 2013-11-12 15:07:57 -0800 | [diff] [blame] | 224 | { |
| 225 | phys_addr_t this_start, this_end, cand; |
| 226 | u64 i; |
| 227 | |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 228 | for_each_free_mem_range_reverse(i, nid, flags, &this_start, &this_end, |
| 229 | NULL) { |
Tang Chen | 1402899 | 2013-11-12 15:07:57 -0800 | [diff] [blame] | 230 | this_start = clamp(this_start, start, end); |
| 231 | this_end = clamp(this_end, start, end); |
| 232 | |
| 233 | if (this_end < size) |
| 234 | continue; |
| 235 | |
| 236 | cand = round_down(this_end - size, align); |
| 237 | if (cand >= this_start) |
| 238 | return cand; |
| 239 | } |
| 240 | |
| 241 | return 0; |
| 242 | } |
| 243 | |
| 244 | /** |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 245 | * memblock_find_in_range_node - find free area in given range and node |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 246 | * @size: size of free area to find |
| 247 | * @align: alignment of free area to find |
Grygorii Strashko | 87029ee | 2014-01-21 15:50:14 -0800 | [diff] [blame] | 248 | * @start: start of candidate range |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 249 | * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or |
| 250 | * %MEMBLOCK_ALLOC_ACCESSIBLE |
Grygorii Strashko | b115423 | 2014-01-21 15:50:16 -0800 | [diff] [blame] | 251 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 252 | * @flags: pick from blocks based on memory attributes |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 253 | * |
| 254 | * Find @size free area aligned to @align in the specified range and node. |
| 255 | * |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 256 | * When allocation direction is bottom-up, the @start should be greater |
| 257 | * than the end of the kernel image. Otherwise, it will be trimmed. The |
| 258 | * reason is that we want the bottom-up allocation just near the kernel |
| 259 | * image so it is highly likely that the allocated memory and the kernel |
| 260 | * will reside in the same node. |
| 261 | * |
| 262 | * If bottom-up allocation failed, will try to allocate memory top-down. |
| 263 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 264 | * Return: |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 265 | * Found address on success, 0 on failure. |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 266 | */ |
Mike Rapoport | c366ea8 | 2019-03-11 23:29:46 -0700 | [diff] [blame] | 267 | static phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size, |
Grygorii Strashko | 87029ee | 2014-01-21 15:50:14 -0800 | [diff] [blame] | 268 | phys_addr_t align, phys_addr_t start, |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 269 | phys_addr_t end, int nid, |
| 270 | enum memblock_flags flags) |
Tang Chen | f7210e6 | 2013-02-22 16:33:51 -0800 | [diff] [blame] | 271 | { |
Tang Chen | 0cfb8f0 | 2014-08-29 15:18:31 -0700 | [diff] [blame] | 272 | phys_addr_t kernel_end, ret; |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 273 | |
Tang Chen | f7210e6 | 2013-02-22 16:33:51 -0800 | [diff] [blame] | 274 | /* pump up @end */ |
Qian Cai | fed84c7 | 2018-12-28 00:36:29 -0800 | [diff] [blame] | 275 | if (end == MEMBLOCK_ALLOC_ACCESSIBLE || |
| 276 | end == MEMBLOCK_ALLOC_KASAN) |
Tang Chen | f7210e6 | 2013-02-22 16:33:51 -0800 | [diff] [blame] | 277 | end = memblock.current_limit; |
| 278 | |
| 279 | /* avoid allocating the first page */ |
| 280 | start = max_t(phys_addr_t, start, PAGE_SIZE); |
| 281 | end = max(start, end); |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 282 | kernel_end = __pa_symbol(_end); |
| 283 | |
| 284 | /* |
| 285 | * try bottom-up allocation only when bottom-up mode |
| 286 | * is set and @end is above the kernel image. |
| 287 | */ |
| 288 | if (memblock_bottom_up() && end > kernel_end) { |
| 289 | phys_addr_t bottom_up_start; |
| 290 | |
| 291 | /* make sure we will allocate above the kernel */ |
| 292 | bottom_up_start = max(start, kernel_end); |
| 293 | |
| 294 | /* ok, try bottom-up allocation first */ |
| 295 | ret = __memblock_find_range_bottom_up(bottom_up_start, end, |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 296 | size, align, nid, flags); |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 297 | if (ret) |
| 298 | return ret; |
| 299 | |
| 300 | /* |
| 301 | * we always limit bottom-up allocation above the kernel, |
| 302 | * but top-down allocation doesn't have the limit, so |
| 303 | * retrying top-down allocation may succeed when bottom-up |
| 304 | * allocation failed. |
| 305 | * |
| 306 | * bottom-up allocation is expected to be fail very rarely, |
| 307 | * so we use WARN_ONCE() here to see the stack trace if |
| 308 | * fail happens. |
| 309 | */ |
Michal Hocko | e3d301c | 2018-07-13 16:59:16 -0700 | [diff] [blame] | 310 | WARN_ONCE(IS_ENABLED(CONFIG_MEMORY_HOTREMOVE), |
| 311 | "memblock: bottom-up allocation failed, memory hotremove may be affected\n"); |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 312 | } |
Tang Chen | f7210e6 | 2013-02-22 16:33:51 -0800 | [diff] [blame] | 313 | |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 314 | return __memblock_find_range_top_down(start, end, size, align, nid, |
| 315 | flags); |
Tang Chen | f7210e6 | 2013-02-22 16:33:51 -0800 | [diff] [blame] | 316 | } |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 317 | |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 318 | /** |
| 319 | * memblock_find_in_range - find free area in given range |
| 320 | * @start: start of candidate range |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 321 | * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or |
| 322 | * %MEMBLOCK_ALLOC_ACCESSIBLE |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 323 | * @size: size of free area to find |
| 324 | * @align: alignment of free area to find |
| 325 | * |
| 326 | * Find @size free area aligned to @align in the specified range. |
| 327 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 328 | * Return: |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 329 | * Found address on success, 0 on failure. |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 330 | */ |
| 331 | phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start, |
| 332 | phys_addr_t end, phys_addr_t size, |
| 333 | phys_addr_t align) |
| 334 | { |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 335 | phys_addr_t ret; |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 336 | enum memblock_flags flags = choose_memblock_flags(); |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 337 | |
| 338 | again: |
| 339 | ret = memblock_find_in_range_node(size, align, start, end, |
| 340 | NUMA_NO_NODE, flags); |
| 341 | |
| 342 | if (!ret && (flags & MEMBLOCK_MIRROR)) { |
| 343 | pr_warn("Could not allocate %pap bytes of mirrored memory\n", |
| 344 | &size); |
| 345 | flags &= ~MEMBLOCK_MIRROR; |
| 346 | goto again; |
| 347 | } |
| 348 | |
| 349 | return ret; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 350 | } |
| 351 | |
Yinghai Lu | 10d0643 | 2010-07-28 15:43:02 +1000 | [diff] [blame] | 352 | static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 353 | { |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 354 | type->total_size -= type->regions[r].size; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 355 | memmove(&type->regions[r], &type->regions[r + 1], |
| 356 | (type->cnt - (r + 1)) * sizeof(type->regions[r])); |
Benjamin Herrenschmidt | e3239ff | 2010-08-04 14:06:41 +1000 | [diff] [blame] | 357 | type->cnt--; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 358 | |
Benjamin Herrenschmidt | 8f7a660 | 2011-03-22 16:33:43 -0700 | [diff] [blame] | 359 | /* Special case for empty arrays */ |
| 360 | if (type->cnt == 0) { |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 361 | WARN_ON(type->total_size != 0); |
Benjamin Herrenschmidt | 8f7a660 | 2011-03-22 16:33:43 -0700 | [diff] [blame] | 362 | type->cnt = 1; |
| 363 | type->regions[0].base = 0; |
| 364 | type->regions[0].size = 0; |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 365 | type->regions[0].flags = 0; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 366 | memblock_set_region_node(&type->regions[0], MAX_NUMNODES); |
Benjamin Herrenschmidt | 8f7a660 | 2011-03-22 16:33:43 -0700 | [diff] [blame] | 367 | } |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 368 | } |
| 369 | |
Mike Rapoport | 350e88b | 2019-05-13 17:22:59 -0700 | [diff] [blame] | 370 | #ifndef CONFIG_ARCH_KEEP_MEMBLOCK |
Pavel Tatashin | 3010f87 | 2017-08-18 15:16:05 -0700 | [diff] [blame] | 371 | /** |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 372 | * memblock_discard - discard memory and reserved arrays if they were allocated |
Pavel Tatashin | 3010f87 | 2017-08-18 15:16:05 -0700 | [diff] [blame] | 373 | */ |
| 374 | void __init memblock_discard(void) |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 375 | { |
Pavel Tatashin | 3010f87 | 2017-08-18 15:16:05 -0700 | [diff] [blame] | 376 | phys_addr_t addr, size; |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 377 | |
Pavel Tatashin | 3010f87 | 2017-08-18 15:16:05 -0700 | [diff] [blame] | 378 | if (memblock.reserved.regions != memblock_reserved_init_regions) { |
| 379 | addr = __pa(memblock.reserved.regions); |
| 380 | size = PAGE_ALIGN(sizeof(struct memblock_region) * |
| 381 | memblock.reserved.max); |
| 382 | __memblock_free_late(addr, size); |
| 383 | } |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 384 | |
Pavel Tatashin | 91b540f9 | 2017-08-25 15:55:46 -0700 | [diff] [blame] | 385 | if (memblock.memory.regions != memblock_memory_init_regions) { |
Pavel Tatashin | 3010f87 | 2017-08-18 15:16:05 -0700 | [diff] [blame] | 386 | addr = __pa(memblock.memory.regions); |
| 387 | size = PAGE_ALIGN(sizeof(struct memblock_region) * |
| 388 | memblock.memory.max); |
| 389 | __memblock_free_late(addr, size); |
| 390 | } |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 391 | } |
Philipp Hachtmann | 5e270e2 | 2014-01-23 15:53:11 -0800 | [diff] [blame] | 392 | #endif |
| 393 | |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 394 | /** |
| 395 | * memblock_double_array - double the size of the memblock regions array |
| 396 | * @type: memblock type of the regions array being doubled |
| 397 | * @new_area_start: starting address of memory range to avoid overlap with |
| 398 | * @new_area_size: size of memory range to avoid overlap with |
| 399 | * |
| 400 | * Double the size of the @type regions array. If memblock is being used to |
| 401 | * allocate memory for a new reserved regions array and there is a previously |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 402 | * allocated memory range [@new_area_start, @new_area_start + @new_area_size] |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 403 | * waiting to be reserved, ensure the memory used by the new array does |
| 404 | * not overlap. |
| 405 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 406 | * Return: |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 407 | * 0 on success, -1 on failure. |
| 408 | */ |
| 409 | static int __init_memblock memblock_double_array(struct memblock_type *type, |
| 410 | phys_addr_t new_area_start, |
| 411 | phys_addr_t new_area_size) |
Benjamin Herrenschmidt | 142b45a7 | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 412 | { |
| 413 | struct memblock_region *new_array, *old_array; |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 414 | phys_addr_t old_alloc_size, new_alloc_size; |
Mike Rapoport | a36aab8 | 2018-08-17 15:47:17 -0700 | [diff] [blame] | 415 | phys_addr_t old_size, new_size, addr, new_end; |
Benjamin Herrenschmidt | 142b45a7 | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 416 | int use_slab = slab_is_available(); |
Gavin Shan | 181eb39 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 417 | int *in_slab; |
Benjamin Herrenschmidt | 142b45a7 | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 418 | |
| 419 | /* We don't allow resizing until we know about the reserved regions |
| 420 | * of memory that aren't suitable for allocation |
| 421 | */ |
| 422 | if (!memblock_can_resize) |
| 423 | return -1; |
| 424 | |
Benjamin Herrenschmidt | 142b45a7 | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 425 | /* Calculate new doubled size */ |
| 426 | old_size = type->max * sizeof(struct memblock_region); |
| 427 | new_size = old_size << 1; |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 428 | /* |
| 429 | * We need to allocated new one align to PAGE_SIZE, |
| 430 | * so we can free them completely later. |
| 431 | */ |
| 432 | old_alloc_size = PAGE_ALIGN(old_size); |
| 433 | new_alloc_size = PAGE_ALIGN(new_size); |
Benjamin Herrenschmidt | 142b45a7 | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 434 | |
Gavin Shan | 181eb39 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 435 | /* Retrieve the slab flag */ |
| 436 | if (type == &memblock.memory) |
| 437 | in_slab = &memblock_memory_in_slab; |
| 438 | else |
| 439 | in_slab = &memblock_reserved_in_slab; |
| 440 | |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 441 | /* Try to find some space for it */ |
Benjamin Herrenschmidt | 142b45a7 | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 442 | if (use_slab) { |
| 443 | new_array = kmalloc(new_size, GFP_KERNEL); |
Tejun Heo | 1f5026a | 2011-07-12 09:58:09 +0200 | [diff] [blame] | 444 | addr = new_array ? __pa(new_array) : 0; |
Gavin Shan | 4e2f077 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 445 | } else { |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 446 | /* only exclude range when trying to double reserved.regions */ |
| 447 | if (type != &memblock.reserved) |
| 448 | new_area_start = new_area_size = 0; |
| 449 | |
| 450 | addr = memblock_find_in_range(new_area_start + new_area_size, |
| 451 | memblock.current_limit, |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 452 | new_alloc_size, PAGE_SIZE); |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 453 | if (!addr && new_area_size) |
| 454 | addr = memblock_find_in_range(0, |
Andrew Morton | fd07383 | 2012-07-31 16:42:40 -0700 | [diff] [blame] | 455 | min(new_area_start, memblock.current_limit), |
| 456 | new_alloc_size, PAGE_SIZE); |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 457 | |
Sachin Kamat | 1567486 | 2012-09-04 13:55:05 +0530 | [diff] [blame] | 458 | new_array = addr ? __va(addr) : NULL; |
Gavin Shan | 4e2f077 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 459 | } |
Tejun Heo | 1f5026a | 2011-07-12 09:58:09 +0200 | [diff] [blame] | 460 | if (!addr) { |
Benjamin Herrenschmidt | 142b45a7 | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 461 | pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n", |
Heiko Carstens | 0262d9c | 2017-02-24 14:55:59 -0800 | [diff] [blame] | 462 | type->name, type->max, type->max * 2); |
Benjamin Herrenschmidt | 142b45a7 | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 463 | return -1; |
| 464 | } |
Benjamin Herrenschmidt | 142b45a7 | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 465 | |
Mike Rapoport | a36aab8 | 2018-08-17 15:47:17 -0700 | [diff] [blame] | 466 | new_end = addr + new_size - 1; |
| 467 | memblock_dbg("memblock: %s is doubled to %ld at [%pa-%pa]", |
| 468 | type->name, type->max * 2, &addr, &new_end); |
Yinghai Lu | ea9e437 | 2010-07-28 15:13:22 +1000 | [diff] [blame] | 469 | |
Andrew Morton | fd07383 | 2012-07-31 16:42:40 -0700 | [diff] [blame] | 470 | /* |
| 471 | * Found space, we now need to move the array over before we add the |
| 472 | * reserved region since it may be our reserved array itself that is |
| 473 | * full. |
Benjamin Herrenschmidt | 142b45a7 | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 474 | */ |
| 475 | memcpy(new_array, type->regions, old_size); |
| 476 | memset(new_array + type->max, 0, old_size); |
| 477 | old_array = type->regions; |
| 478 | type->regions = new_array; |
| 479 | type->max <<= 1; |
| 480 | |
Andrew Morton | fd07383 | 2012-07-31 16:42:40 -0700 | [diff] [blame] | 481 | /* Free old array. We needn't free it if the array is the static one */ |
Gavin Shan | 181eb39 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 482 | if (*in_slab) |
| 483 | kfree(old_array); |
| 484 | else if (old_array != memblock_memory_init_regions && |
| 485 | old_array != memblock_reserved_init_regions) |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 486 | memblock_free(__pa(old_array), old_alloc_size); |
Benjamin Herrenschmidt | 142b45a7 | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 487 | |
Andrew Morton | fd07383 | 2012-07-31 16:42:40 -0700 | [diff] [blame] | 488 | /* |
| 489 | * Reserve the new array if that comes from the memblock. Otherwise, we |
| 490 | * needn't do it |
Gavin Shan | 181eb39 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 491 | */ |
| 492 | if (!use_slab) |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 493 | BUG_ON(memblock_reserve(addr, new_alloc_size)); |
Gavin Shan | 181eb39 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 494 | |
| 495 | /* Update slab flag */ |
| 496 | *in_slab = use_slab; |
| 497 | |
Benjamin Herrenschmidt | 142b45a7 | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 498 | return 0; |
| 499 | } |
| 500 | |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 501 | /** |
| 502 | * memblock_merge_regions - merge neighboring compatible regions |
| 503 | * @type: memblock type to scan |
| 504 | * |
| 505 | * Scan @type and merge neighboring compatible regions. |
| 506 | */ |
| 507 | static void __init_memblock memblock_merge_regions(struct memblock_type *type) |
| 508 | { |
| 509 | int i = 0; |
| 510 | |
| 511 | /* cnt never goes below 1 */ |
| 512 | while (i < type->cnt - 1) { |
| 513 | struct memblock_region *this = &type->regions[i]; |
| 514 | struct memblock_region *next = &type->regions[i + 1]; |
| 515 | |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 516 | if (this->base + this->size != next->base || |
| 517 | memblock_get_region_node(this) != |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 518 | memblock_get_region_node(next) || |
| 519 | this->flags != next->flags) { |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 520 | BUG_ON(this->base + this->size > next->base); |
| 521 | i++; |
| 522 | continue; |
| 523 | } |
| 524 | |
| 525 | this->size += next->size; |
Lin Feng | c0232ae | 2013-01-11 14:31:44 -0800 | [diff] [blame] | 526 | /* move forward from next + 1, index of which is i + 2 */ |
| 527 | memmove(next, next + 1, (type->cnt - (i + 2)) * sizeof(*next)); |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 528 | type->cnt--; |
| 529 | } |
| 530 | } |
| 531 | |
| 532 | /** |
| 533 | * memblock_insert_region - insert new memblock region |
Tang Chen | 209ff86 | 2013-04-29 15:08:41 -0700 | [diff] [blame] | 534 | * @type: memblock type to insert into |
| 535 | * @idx: index for the insertion point |
| 536 | * @base: base address of the new region |
| 537 | * @size: size of the new region |
| 538 | * @nid: node id of the new region |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 539 | * @flags: flags of the new region |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 540 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 541 | * Insert new memblock region [@base, @base + @size) into @type at @idx. |
Alexander Kuleshov | 412d000 | 2016-08-04 15:31:46 -0700 | [diff] [blame] | 542 | * @type must already have extra room to accommodate the new region. |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 543 | */ |
| 544 | static void __init_memblock memblock_insert_region(struct memblock_type *type, |
| 545 | int idx, phys_addr_t base, |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 546 | phys_addr_t size, |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 547 | int nid, |
| 548 | enum memblock_flags flags) |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 549 | { |
| 550 | struct memblock_region *rgn = &type->regions[idx]; |
| 551 | |
| 552 | BUG_ON(type->cnt >= type->max); |
| 553 | memmove(rgn + 1, rgn, (type->cnt - idx) * sizeof(*rgn)); |
| 554 | rgn->base = base; |
| 555 | rgn->size = size; |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 556 | rgn->flags = flags; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 557 | memblock_set_region_node(rgn, nid); |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 558 | type->cnt++; |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 559 | type->total_size += size; |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 560 | } |
| 561 | |
| 562 | /** |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 563 | * memblock_add_range - add new memblock region |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 564 | * @type: memblock type to add new region into |
| 565 | * @base: base address of the new region |
| 566 | * @size: size of the new region |
Tejun Heo | 7fb0bc3 | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 567 | * @nid: nid of the new region |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 568 | * @flags: flags of the new region |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 569 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 570 | * Add new memblock region [@base, @base + @size) into @type. The new region |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 571 | * is allowed to overlap with existing ones - overlaps don't affect already |
| 572 | * existing regions. @type is guaranteed to be minimal (all neighbouring |
| 573 | * compatible regions are merged) after the addition. |
| 574 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 575 | * Return: |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 576 | * 0 on success, -errno on failure. |
| 577 | */ |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 578 | int __init_memblock memblock_add_range(struct memblock_type *type, |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 579 | phys_addr_t base, phys_addr_t size, |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 580 | int nid, enum memblock_flags flags) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 581 | { |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 582 | bool insert = false; |
Tejun Heo | eb18f1b | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 583 | phys_addr_t obase = base; |
| 584 | phys_addr_t end = base + memblock_cap_size(base, &size); |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 585 | int idx, nr_new; |
| 586 | struct memblock_region *rgn; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 587 | |
Tejun Heo | b3dc627 | 2012-04-20 08:31:34 -0700 | [diff] [blame] | 588 | if (!size) |
| 589 | return 0; |
| 590 | |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 591 | /* special case for empty array */ |
| 592 | if (type->regions[0].size == 0) { |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 593 | WARN_ON(type->cnt != 1 || type->total_size); |
Benjamin Herrenschmidt | e3239ff | 2010-08-04 14:06:41 +1000 | [diff] [blame] | 594 | type->regions[0].base = base; |
| 595 | type->regions[0].size = size; |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 596 | type->regions[0].flags = flags; |
Tejun Heo | 7fb0bc3 | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 597 | memblock_set_region_node(&type->regions[0], nid); |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 598 | type->total_size = size; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 599 | return 0; |
| 600 | } |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 601 | repeat: |
| 602 | /* |
| 603 | * The following is executed twice. Once with %false @insert and |
| 604 | * then with %true. The first counts the number of regions needed |
Alexander Kuleshov | 412d000 | 2016-08-04 15:31:46 -0700 | [diff] [blame] | 605 | * to accommodate the new area. The second actually inserts them. |
Benjamin Herrenschmidt | 142b45a7 | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 606 | */ |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 607 | base = obase; |
| 608 | nr_new = 0; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 609 | |
Gioh Kim | 66e8b43 | 2017-11-15 17:33:42 -0800 | [diff] [blame] | 610 | for_each_memblock_type(idx, type, rgn) { |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 611 | phys_addr_t rbase = rgn->base; |
| 612 | phys_addr_t rend = rbase + rgn->size; |
| 613 | |
| 614 | if (rbase >= end) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 615 | break; |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 616 | if (rend <= base) |
| 617 | continue; |
| 618 | /* |
| 619 | * @rgn overlaps. If it separates the lower part of new |
| 620 | * area, insert that portion. |
| 621 | */ |
| 622 | if (rbase > base) { |
Wei Yang | c0a2949 | 2015-09-04 15:47:38 -0700 | [diff] [blame] | 623 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
| 624 | WARN_ON(nid != memblock_get_region_node(rgn)); |
| 625 | #endif |
Wei Yang | 4fcab5f | 2015-09-08 14:59:53 -0700 | [diff] [blame] | 626 | WARN_ON(flags != rgn->flags); |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 627 | nr_new++; |
| 628 | if (insert) |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 629 | memblock_insert_region(type, idx++, base, |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 630 | rbase - base, nid, |
| 631 | flags); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 632 | } |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 633 | /* area below @rend is dealt with, forget about it */ |
| 634 | base = min(rend, end); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 635 | } |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 636 | |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 637 | /* insert the remaining portion */ |
| 638 | if (base < end) { |
| 639 | nr_new++; |
| 640 | if (insert) |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 641 | memblock_insert_region(type, idx, base, end - base, |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 642 | nid, flags); |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 643 | } |
| 644 | |
nimisolo | ef3cc4d | 2016-07-26 15:24:56 -0700 | [diff] [blame] | 645 | if (!nr_new) |
| 646 | return 0; |
| 647 | |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 648 | /* |
| 649 | * If this was the first round, resize array and repeat for actual |
| 650 | * insertions; otherwise, merge and return. |
Benjamin Herrenschmidt | 142b45a7 | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 651 | */ |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 652 | if (!insert) { |
| 653 | while (type->cnt + nr_new > type->max) |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 654 | if (memblock_double_array(type, obase, size) < 0) |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 655 | return -ENOMEM; |
| 656 | insert = true; |
| 657 | goto repeat; |
| 658 | } else { |
| 659 | memblock_merge_regions(type); |
| 660 | return 0; |
Benjamin Herrenschmidt | 142b45a7 | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 661 | } |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 662 | } |
| 663 | |
Mike Rapoport | 48a833c | 2018-06-30 17:55:03 +0300 | [diff] [blame] | 664 | /** |
| 665 | * memblock_add_node - add new memblock region within a NUMA node |
| 666 | * @base: base address of the new region |
| 667 | * @size: size of the new region |
| 668 | * @nid: nid of the new region |
| 669 | * |
| 670 | * Add new memblock region [@base, @base + @size) to the "memory" |
| 671 | * type. See memblock_add_range() description for mode details |
| 672 | * |
| 673 | * Return: |
| 674 | * 0 on success, -errno on failure. |
| 675 | */ |
Tejun Heo | 7fb0bc3 | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 676 | int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size, |
| 677 | int nid) |
| 678 | { |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 679 | return memblock_add_range(&memblock.memory, base, size, nid, 0); |
Tejun Heo | 7fb0bc3 | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 680 | } |
| 681 | |
Mike Rapoport | 48a833c | 2018-06-30 17:55:03 +0300 | [diff] [blame] | 682 | /** |
| 683 | * memblock_add - add new memblock region |
| 684 | * @base: base address of the new region |
| 685 | * @size: size of the new region |
| 686 | * |
| 687 | * Add new memblock region [@base, @base + @size) to the "memory" |
| 688 | * type. See memblock_add_range() description for mode details |
| 689 | * |
| 690 | * Return: |
| 691 | * 0 on success, -errno on failure. |
| 692 | */ |
Alexander Kuleshov | f705ac4 | 2016-05-20 16:57:35 -0700 | [diff] [blame] | 693 | int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) |
Alexander Kuleshov | 6a4055b | 2015-04-15 16:14:44 -0700 | [diff] [blame] | 694 | { |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 695 | phys_addr_t end = base + size - 1; |
| 696 | |
Sakari Ailus | d75f773 | 2019-03-25 21:32:28 +0200 | [diff] [blame] | 697 | memblock_dbg("memblock_add: [%pa-%pa] %pS\n", |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 698 | &base, &end, (void *)_RET_IP_); |
Alexander Kuleshov | 6a4055b | 2015-04-15 16:14:44 -0700 | [diff] [blame] | 699 | |
Alexander Kuleshov | f705ac4 | 2016-05-20 16:57:35 -0700 | [diff] [blame] | 700 | return memblock_add_range(&memblock.memory, base, size, MAX_NUMNODES, 0); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 701 | } |
| 702 | |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 703 | /** |
| 704 | * memblock_isolate_range - isolate given range into disjoint memblocks |
| 705 | * @type: memblock type to isolate range for |
| 706 | * @base: base of range to isolate |
| 707 | * @size: size of range to isolate |
| 708 | * @start_rgn: out parameter for the start of isolated region |
| 709 | * @end_rgn: out parameter for the end of isolated region |
| 710 | * |
| 711 | * Walk @type and ensure that regions don't cross the boundaries defined by |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 712 | * [@base, @base + @size). Crossing regions are split at the boundaries, |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 713 | * which may create at most two more regions. The index of the first |
| 714 | * region inside the range is returned in *@start_rgn and end in *@end_rgn. |
| 715 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 716 | * Return: |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 717 | * 0 on success, -errno on failure. |
| 718 | */ |
| 719 | static int __init_memblock memblock_isolate_range(struct memblock_type *type, |
| 720 | phys_addr_t base, phys_addr_t size, |
| 721 | int *start_rgn, int *end_rgn) |
| 722 | { |
Tejun Heo | eb18f1b | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 723 | phys_addr_t end = base + memblock_cap_size(base, &size); |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 724 | int idx; |
| 725 | struct memblock_region *rgn; |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 726 | |
| 727 | *start_rgn = *end_rgn = 0; |
| 728 | |
Tejun Heo | b3dc627 | 2012-04-20 08:31:34 -0700 | [diff] [blame] | 729 | if (!size) |
| 730 | return 0; |
| 731 | |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 732 | /* we'll create at most two more regions */ |
| 733 | while (type->cnt + 2 > type->max) |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 734 | if (memblock_double_array(type, base, size) < 0) |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 735 | return -ENOMEM; |
| 736 | |
Gioh Kim | 66e8b43 | 2017-11-15 17:33:42 -0800 | [diff] [blame] | 737 | for_each_memblock_type(idx, type, rgn) { |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 738 | phys_addr_t rbase = rgn->base; |
| 739 | phys_addr_t rend = rbase + rgn->size; |
| 740 | |
| 741 | if (rbase >= end) |
| 742 | break; |
| 743 | if (rend <= base) |
| 744 | continue; |
| 745 | |
| 746 | if (rbase < base) { |
| 747 | /* |
| 748 | * @rgn intersects from below. Split and continue |
| 749 | * to process the next region - the new top half. |
| 750 | */ |
| 751 | rgn->base = base; |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 752 | rgn->size -= base - rbase; |
| 753 | type->total_size -= base - rbase; |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 754 | memblock_insert_region(type, idx, rbase, base - rbase, |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 755 | memblock_get_region_node(rgn), |
| 756 | rgn->flags); |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 757 | } else if (rend > end) { |
| 758 | /* |
| 759 | * @rgn intersects from above. Split and redo the |
| 760 | * current region - the new bottom half. |
| 761 | */ |
| 762 | rgn->base = end; |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 763 | rgn->size -= end - rbase; |
| 764 | type->total_size -= end - rbase; |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 765 | memblock_insert_region(type, idx--, rbase, end - rbase, |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 766 | memblock_get_region_node(rgn), |
| 767 | rgn->flags); |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 768 | } else { |
| 769 | /* @rgn is fully contained, record it */ |
| 770 | if (!*end_rgn) |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 771 | *start_rgn = idx; |
| 772 | *end_rgn = idx + 1; |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 773 | } |
| 774 | } |
| 775 | |
| 776 | return 0; |
| 777 | } |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 778 | |
Alexander Kuleshov | 35bd16a | 2015-11-05 18:47:00 -0800 | [diff] [blame] | 779 | static int __init_memblock memblock_remove_range(struct memblock_type *type, |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 780 | phys_addr_t base, phys_addr_t size) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 781 | { |
Tejun Heo | 7193618 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 782 | int start_rgn, end_rgn; |
| 783 | int i, ret; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 784 | |
Tejun Heo | 7193618 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 785 | ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); |
| 786 | if (ret) |
| 787 | return ret; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 788 | |
Tejun Heo | 7193618 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 789 | for (i = end_rgn - 1; i >= start_rgn; i--) |
| 790 | memblock_remove_region(type, i); |
Benjamin Herrenschmidt | 8f7a660 | 2011-03-22 16:33:43 -0700 | [diff] [blame] | 791 | return 0; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 792 | } |
| 793 | |
Tejun Heo | 581adcb | 2011-12-08 10:22:06 -0800 | [diff] [blame] | 794 | int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 795 | { |
Minchan Kim | 25cf23d | 2018-06-07 17:07:35 -0700 | [diff] [blame] | 796 | phys_addr_t end = base + size - 1; |
| 797 | |
| 798 | memblock_dbg("memblock_remove: [%pa-%pa] %pS\n", |
| 799 | &base, &end, (void *)_RET_IP_); |
| 800 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 801 | return memblock_remove_range(&memblock.memory, base, size); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 802 | } |
| 803 | |
Mike Rapoport | 4d72868 | 2018-12-28 00:35:29 -0800 | [diff] [blame] | 804 | /** |
| 805 | * memblock_free - free boot memory block |
| 806 | * @base: phys starting address of the boot memory block |
| 807 | * @size: size of the boot memory block in bytes |
| 808 | * |
| 809 | * Free boot memory block previously allocated by memblock_alloc_xx() API. |
| 810 | * The freeing memory will not be released to the buddy allocator. |
| 811 | */ |
Tejun Heo | 581adcb | 2011-12-08 10:22:06 -0800 | [diff] [blame] | 812 | int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 813 | { |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 814 | phys_addr_t end = base + size - 1; |
| 815 | |
Sakari Ailus | d75f773 | 2019-03-25 21:32:28 +0200 | [diff] [blame] | 816 | memblock_dbg(" memblock_free: [%pa-%pa] %pS\n", |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 817 | &base, &end, (void *)_RET_IP_); |
Tejun Heo | 24aa078 | 2011-07-12 11:16:06 +0200 | [diff] [blame] | 818 | |
Catalin Marinas | 9099dae | 2016-10-11 13:55:11 -0700 | [diff] [blame] | 819 | kmemleak_free_part_phys(base, size); |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 820 | return memblock_remove_range(&memblock.reserved, base, size); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 821 | } |
| 822 | |
Alexander Kuleshov | f705ac4 | 2016-05-20 16:57:35 -0700 | [diff] [blame] | 823 | int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 824 | { |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 825 | phys_addr_t end = base + size - 1; |
| 826 | |
Sakari Ailus | d75f773 | 2019-03-25 21:32:28 +0200 | [diff] [blame] | 827 | memblock_dbg("memblock_reserve: [%pa-%pa] %pS\n", |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 828 | &base, &end, (void *)_RET_IP_); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 829 | |
Alexander Kuleshov | f705ac4 | 2016-05-20 16:57:35 -0700 | [diff] [blame] | 830 | return memblock_add_range(&memblock.reserved, base, size, MAX_NUMNODES, 0); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 831 | } |
| 832 | |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 833 | /** |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 834 | * memblock_setclr_flag - set or clear flag for a memory region |
| 835 | * @base: base address of the region |
| 836 | * @size: size of the region |
| 837 | * @set: set or clear the flag |
| 838 | * @flag: the flag to udpate |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 839 | * |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 840 | * This function isolates region [@base, @base + @size), and sets/clears flag |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 841 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 842 | * Return: 0 on success, -errno on failure. |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 843 | */ |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 844 | static int __init_memblock memblock_setclr_flag(phys_addr_t base, |
| 845 | phys_addr_t size, int set, int flag) |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 846 | { |
| 847 | struct memblock_type *type = &memblock.memory; |
| 848 | int i, ret, start_rgn, end_rgn; |
| 849 | |
| 850 | ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); |
| 851 | if (ret) |
| 852 | return ret; |
| 853 | |
Mike Rapoport | fe14512 | 2019-03-11 23:30:46 -0700 | [diff] [blame] | 854 | for (i = start_rgn; i < end_rgn; i++) { |
| 855 | struct memblock_region *r = &type->regions[i]; |
| 856 | |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 857 | if (set) |
Mike Rapoport | fe14512 | 2019-03-11 23:30:46 -0700 | [diff] [blame] | 858 | r->flags |= flag; |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 859 | else |
Mike Rapoport | fe14512 | 2019-03-11 23:30:46 -0700 | [diff] [blame] | 860 | r->flags &= ~flag; |
| 861 | } |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 862 | |
| 863 | memblock_merge_regions(type); |
| 864 | return 0; |
| 865 | } |
| 866 | |
| 867 | /** |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 868 | * memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG. |
| 869 | * @base: the base phys addr of the region |
| 870 | * @size: the size of the region |
| 871 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 872 | * Return: 0 on success, -errno on failure. |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 873 | */ |
| 874 | int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size) |
| 875 | { |
| 876 | return memblock_setclr_flag(base, size, 1, MEMBLOCK_HOTPLUG); |
| 877 | } |
| 878 | |
| 879 | /** |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 880 | * memblock_clear_hotplug - Clear flag MEMBLOCK_HOTPLUG for a specified region. |
| 881 | * @base: the base phys addr of the region |
| 882 | * @size: the size of the region |
| 883 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 884 | * Return: 0 on success, -errno on failure. |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 885 | */ |
| 886 | int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size) |
| 887 | { |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 888 | return memblock_setclr_flag(base, size, 0, MEMBLOCK_HOTPLUG); |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 889 | } |
| 890 | |
| 891 | /** |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 892 | * memblock_mark_mirror - Mark mirrored memory with flag MEMBLOCK_MIRROR. |
| 893 | * @base: the base phys addr of the region |
| 894 | * @size: the size of the region |
| 895 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 896 | * Return: 0 on success, -errno on failure. |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 897 | */ |
| 898 | int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size) |
| 899 | { |
| 900 | system_has_some_mirror = true; |
| 901 | |
| 902 | return memblock_setclr_flag(base, size, 1, MEMBLOCK_MIRROR); |
| 903 | } |
| 904 | |
Ard Biesheuvel | bf3d3cc | 2015-11-30 13:28:15 +0100 | [diff] [blame] | 905 | /** |
| 906 | * memblock_mark_nomap - Mark a memory region with flag MEMBLOCK_NOMAP. |
| 907 | * @base: the base phys addr of the region |
| 908 | * @size: the size of the region |
| 909 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 910 | * Return: 0 on success, -errno on failure. |
Ard Biesheuvel | bf3d3cc | 2015-11-30 13:28:15 +0100 | [diff] [blame] | 911 | */ |
| 912 | int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size) |
| 913 | { |
| 914 | return memblock_setclr_flag(base, size, 1, MEMBLOCK_NOMAP); |
| 915 | } |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 916 | |
| 917 | /** |
AKASHI Takahiro | 4c546b8 | 2017-04-03 11:23:54 +0900 | [diff] [blame] | 918 | * memblock_clear_nomap - Clear flag MEMBLOCK_NOMAP for a specified region. |
| 919 | * @base: the base phys addr of the region |
| 920 | * @size: the size of the region |
| 921 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 922 | * Return: 0 on success, -errno on failure. |
AKASHI Takahiro | 4c546b8 | 2017-04-03 11:23:54 +0900 | [diff] [blame] | 923 | */ |
| 924 | int __init_memblock memblock_clear_nomap(phys_addr_t base, phys_addr_t size) |
| 925 | { |
| 926 | return memblock_setclr_flag(base, size, 0, MEMBLOCK_NOMAP); |
| 927 | } |
| 928 | |
| 929 | /** |
Robin Holt | 8e7a7f8 | 2015-06-30 14:56:41 -0700 | [diff] [blame] | 930 | * __next_reserved_mem_region - next function for for_each_reserved_region() |
| 931 | * @idx: pointer to u64 loop variable |
| 932 | * @out_start: ptr to phys_addr_t for start address of the region, can be %NULL |
| 933 | * @out_end: ptr to phys_addr_t for end address of the region, can be %NULL |
| 934 | * |
| 935 | * Iterate over all reserved memory regions. |
| 936 | */ |
| 937 | void __init_memblock __next_reserved_mem_region(u64 *idx, |
| 938 | phys_addr_t *out_start, |
| 939 | phys_addr_t *out_end) |
| 940 | { |
Alexander Kuleshov | 567d117 | 2015-09-08 15:03:33 -0700 | [diff] [blame] | 941 | struct memblock_type *type = &memblock.reserved; |
Robin Holt | 8e7a7f8 | 2015-06-30 14:56:41 -0700 | [diff] [blame] | 942 | |
Richard Leitner | cd33a76 | 2016-05-20 16:58:33 -0700 | [diff] [blame] | 943 | if (*idx < type->cnt) { |
Alexander Kuleshov | 567d117 | 2015-09-08 15:03:33 -0700 | [diff] [blame] | 944 | struct memblock_region *r = &type->regions[*idx]; |
Robin Holt | 8e7a7f8 | 2015-06-30 14:56:41 -0700 | [diff] [blame] | 945 | phys_addr_t base = r->base; |
| 946 | phys_addr_t size = r->size; |
| 947 | |
| 948 | if (out_start) |
| 949 | *out_start = base; |
| 950 | if (out_end) |
| 951 | *out_end = base + size - 1; |
| 952 | |
| 953 | *idx += 1; |
| 954 | return; |
| 955 | } |
| 956 | |
| 957 | /* signal end of iteration */ |
| 958 | *idx = ULLONG_MAX; |
| 959 | } |
| 960 | |
Mike Rapoport | c9a688a | 2019-03-11 23:30:50 -0700 | [diff] [blame] | 961 | static bool should_skip_region(struct memblock_region *m, int nid, int flags) |
| 962 | { |
| 963 | int m_nid = memblock_get_region_node(m); |
| 964 | |
| 965 | /* only memory regions are associated with nodes, check it */ |
| 966 | if (nid != NUMA_NO_NODE && nid != m_nid) |
| 967 | return true; |
| 968 | |
| 969 | /* skip hotpluggable memory regions if needed */ |
| 970 | if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) |
| 971 | return true; |
| 972 | |
| 973 | /* if we want mirror memory skip non-mirror memory regions */ |
| 974 | if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) |
| 975 | return true; |
| 976 | |
| 977 | /* skip nomap memory unless we were asked for it explicitly */ |
| 978 | if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) |
| 979 | return true; |
| 980 | |
| 981 | return false; |
| 982 | } |
| 983 | |
Robin Holt | 8e7a7f8 | 2015-06-30 14:56:41 -0700 | [diff] [blame] | 984 | /** |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 985 | * __next_mem_range - next function for for_each_free_mem_range() etc. |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 986 | * @idx: pointer to u64 loop variable |
Grygorii Strashko | b115423 | 2014-01-21 15:50:16 -0800 | [diff] [blame] | 987 | * @nid: node selector, %NUMA_NO_NODE for all nodes |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 988 | * @flags: pick from blocks based on memory attributes |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 989 | * @type_a: pointer to memblock_type from where the range is taken |
| 990 | * @type_b: pointer to memblock_type which excludes memory from being taken |
Wanpeng Li | dad7557 | 2012-06-20 12:53:01 -0700 | [diff] [blame] | 991 | * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL |
| 992 | * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL |
| 993 | * @out_nid: ptr to int for nid of the range, can be %NULL |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 994 | * |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 995 | * Find the first area from *@idx which matches @nid, fill the out |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 996 | * parameters, and update *@idx for the next iteration. The lower 32bit of |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 997 | * *@idx contains index into type_a and the upper 32bit indexes the |
| 998 | * areas before each region in type_b. For example, if type_b regions |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 999 | * look like the following, |
| 1000 | * |
| 1001 | * 0:[0-16), 1:[32-48), 2:[128-130) |
| 1002 | * |
| 1003 | * The upper 32bit indexes the following regions. |
| 1004 | * |
| 1005 | * 0:[0-0), 1:[16-32), 2:[48-128), 3:[130-MAX) |
| 1006 | * |
| 1007 | * As both region arrays are sorted, the function advances the two indices |
| 1008 | * in lockstep and returns each intersection. |
| 1009 | */ |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 1010 | void __init_memblock __next_mem_range(u64 *idx, int nid, |
| 1011 | enum memblock_flags flags, |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1012 | struct memblock_type *type_a, |
| 1013 | struct memblock_type *type_b, |
| 1014 | phys_addr_t *out_start, |
| 1015 | phys_addr_t *out_end, int *out_nid) |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1016 | { |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1017 | int idx_a = *idx & 0xffffffff; |
| 1018 | int idx_b = *idx >> 32; |
Grygorii Strashko | b115423 | 2014-01-21 15:50:16 -0800 | [diff] [blame] | 1019 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1020 | if (WARN_ONCE(nid == MAX_NUMNODES, |
| 1021 | "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) |
Grygorii Strashko | 560dca27 | 2014-01-21 15:50:55 -0800 | [diff] [blame] | 1022 | nid = NUMA_NO_NODE; |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1023 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1024 | for (; idx_a < type_a->cnt; idx_a++) { |
| 1025 | struct memblock_region *m = &type_a->regions[idx_a]; |
| 1026 | |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1027 | phys_addr_t m_start = m->base; |
| 1028 | phys_addr_t m_end = m->base + m->size; |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1029 | int m_nid = memblock_get_region_node(m); |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1030 | |
Mike Rapoport | c9a688a | 2019-03-11 23:30:50 -0700 | [diff] [blame] | 1031 | if (should_skip_region(m, nid, flags)) |
Ard Biesheuvel | bf3d3cc | 2015-11-30 13:28:15 +0100 | [diff] [blame] | 1032 | continue; |
| 1033 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1034 | if (!type_b) { |
| 1035 | if (out_start) |
| 1036 | *out_start = m_start; |
| 1037 | if (out_end) |
| 1038 | *out_end = m_end; |
| 1039 | if (out_nid) |
| 1040 | *out_nid = m_nid; |
| 1041 | idx_a++; |
| 1042 | *idx = (u32)idx_a | (u64)idx_b << 32; |
| 1043 | return; |
| 1044 | } |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1045 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1046 | /* scan areas before each reservation */ |
| 1047 | for (; idx_b < type_b->cnt + 1; idx_b++) { |
| 1048 | struct memblock_region *r; |
| 1049 | phys_addr_t r_start; |
| 1050 | phys_addr_t r_end; |
| 1051 | |
| 1052 | r = &type_b->regions[idx_b]; |
| 1053 | r_start = idx_b ? r[-1].base + r[-1].size : 0; |
| 1054 | r_end = idx_b < type_b->cnt ? |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1055 | r->base : PHYS_ADDR_MAX; |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1056 | |
| 1057 | /* |
| 1058 | * if idx_b advanced past idx_a, |
| 1059 | * break out to advance idx_a |
| 1060 | */ |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1061 | if (r_start >= m_end) |
| 1062 | break; |
| 1063 | /* if the two regions intersect, we're done */ |
| 1064 | if (m_start < r_end) { |
| 1065 | if (out_start) |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1066 | *out_start = |
| 1067 | max(m_start, r_start); |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1068 | if (out_end) |
| 1069 | *out_end = min(m_end, r_end); |
| 1070 | if (out_nid) |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1071 | *out_nid = m_nid; |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1072 | /* |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1073 | * The region which ends first is |
| 1074 | * advanced for the next iteration. |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1075 | */ |
| 1076 | if (m_end <= r_end) |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1077 | idx_a++; |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1078 | else |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1079 | idx_b++; |
| 1080 | *idx = (u32)idx_a | (u64)idx_b << 32; |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1081 | return; |
| 1082 | } |
| 1083 | } |
| 1084 | } |
| 1085 | |
| 1086 | /* signal end of iteration */ |
| 1087 | *idx = ULLONG_MAX; |
| 1088 | } |
| 1089 | |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1090 | /** |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1091 | * __next_mem_range_rev - generic next function for for_each_*_range_rev() |
| 1092 | * |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1093 | * @idx: pointer to u64 loop variable |
Alexander Kuleshov | ad5ea8c | 2015-09-08 15:04:22 -0700 | [diff] [blame] | 1094 | * @nid: node selector, %NUMA_NO_NODE for all nodes |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 1095 | * @flags: pick from blocks based on memory attributes |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1096 | * @type_a: pointer to memblock_type from where the range is taken |
| 1097 | * @type_b: pointer to memblock_type which excludes memory from being taken |
Wanpeng Li | dad7557 | 2012-06-20 12:53:01 -0700 | [diff] [blame] | 1098 | * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL |
| 1099 | * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL |
| 1100 | * @out_nid: ptr to int for nid of the range, can be %NULL |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1101 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1102 | * Finds the next range from type_a which is not marked as unsuitable |
| 1103 | * in type_b. |
| 1104 | * |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1105 | * Reverse of __next_mem_range(). |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1106 | */ |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 1107 | void __init_memblock __next_mem_range_rev(u64 *idx, int nid, |
| 1108 | enum memblock_flags flags, |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1109 | struct memblock_type *type_a, |
| 1110 | struct memblock_type *type_b, |
| 1111 | phys_addr_t *out_start, |
| 1112 | phys_addr_t *out_end, int *out_nid) |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1113 | { |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1114 | int idx_a = *idx & 0xffffffff; |
| 1115 | int idx_b = *idx >> 32; |
Grygorii Strashko | b115423 | 2014-01-21 15:50:16 -0800 | [diff] [blame] | 1116 | |
Grygorii Strashko | 560dca27 | 2014-01-21 15:50:55 -0800 | [diff] [blame] | 1117 | if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) |
| 1118 | nid = NUMA_NO_NODE; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1119 | |
| 1120 | if (*idx == (u64)ULLONG_MAX) { |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1121 | idx_a = type_a->cnt - 1; |
zijun_hu | e47608a | 2016-08-04 15:32:00 -0700 | [diff] [blame] | 1122 | if (type_b != NULL) |
| 1123 | idx_b = type_b->cnt; |
| 1124 | else |
| 1125 | idx_b = 0; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1126 | } |
| 1127 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1128 | for (; idx_a >= 0; idx_a--) { |
| 1129 | struct memblock_region *m = &type_a->regions[idx_a]; |
| 1130 | |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1131 | phys_addr_t m_start = m->base; |
| 1132 | phys_addr_t m_end = m->base + m->size; |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1133 | int m_nid = memblock_get_region_node(m); |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1134 | |
Mike Rapoport | c9a688a | 2019-03-11 23:30:50 -0700 | [diff] [blame] | 1135 | if (should_skip_region(m, nid, flags)) |
Ard Biesheuvel | bf3d3cc | 2015-11-30 13:28:15 +0100 | [diff] [blame] | 1136 | continue; |
| 1137 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1138 | if (!type_b) { |
| 1139 | if (out_start) |
| 1140 | *out_start = m_start; |
| 1141 | if (out_end) |
| 1142 | *out_end = m_end; |
| 1143 | if (out_nid) |
| 1144 | *out_nid = m_nid; |
zijun_hu | fb399b4 | 2016-07-28 15:48:56 -0700 | [diff] [blame] | 1145 | idx_a--; |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1146 | *idx = (u32)idx_a | (u64)idx_b << 32; |
| 1147 | return; |
| 1148 | } |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1149 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1150 | /* scan areas before each reservation */ |
| 1151 | for (; idx_b >= 0; idx_b--) { |
| 1152 | struct memblock_region *r; |
| 1153 | phys_addr_t r_start; |
| 1154 | phys_addr_t r_end; |
| 1155 | |
| 1156 | r = &type_b->regions[idx_b]; |
| 1157 | r_start = idx_b ? r[-1].base + r[-1].size : 0; |
| 1158 | r_end = idx_b < type_b->cnt ? |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1159 | r->base : PHYS_ADDR_MAX; |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1160 | /* |
| 1161 | * if idx_b advanced past idx_a, |
| 1162 | * break out to advance idx_a |
| 1163 | */ |
| 1164 | |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1165 | if (r_end <= m_start) |
| 1166 | break; |
| 1167 | /* if the two regions intersect, we're done */ |
| 1168 | if (m_end > r_start) { |
| 1169 | if (out_start) |
| 1170 | *out_start = max(m_start, r_start); |
| 1171 | if (out_end) |
| 1172 | *out_end = min(m_end, r_end); |
| 1173 | if (out_nid) |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1174 | *out_nid = m_nid; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1175 | if (m_start >= r_start) |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1176 | idx_a--; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1177 | else |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1178 | idx_b--; |
| 1179 | *idx = (u32)idx_a | (u64)idx_b << 32; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1180 | return; |
| 1181 | } |
| 1182 | } |
| 1183 | } |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1184 | /* signal end of iteration */ |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1185 | *idx = ULLONG_MAX; |
| 1186 | } |
| 1187 | |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1188 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
| 1189 | /* |
Chen Chang | 45e7981 | 2018-11-16 15:08:57 -0800 | [diff] [blame] | 1190 | * Common iterator interface used to define for_each_mem_pfn_range(). |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1191 | */ |
| 1192 | void __init_memblock __next_mem_pfn_range(int *idx, int nid, |
| 1193 | unsigned long *out_start_pfn, |
| 1194 | unsigned long *out_end_pfn, int *out_nid) |
| 1195 | { |
| 1196 | struct memblock_type *type = &memblock.memory; |
| 1197 | struct memblock_region *r; |
| 1198 | |
| 1199 | while (++*idx < type->cnt) { |
| 1200 | r = &type->regions[*idx]; |
| 1201 | |
| 1202 | if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) |
| 1203 | continue; |
| 1204 | if (nid == MAX_NUMNODES || nid == r->nid) |
| 1205 | break; |
| 1206 | } |
| 1207 | if (*idx >= type->cnt) { |
| 1208 | *idx = -1; |
| 1209 | return; |
| 1210 | } |
| 1211 | |
| 1212 | if (out_start_pfn) |
| 1213 | *out_start_pfn = PFN_UP(r->base); |
| 1214 | if (out_end_pfn) |
| 1215 | *out_end_pfn = PFN_DOWN(r->base + r->size); |
| 1216 | if (out_nid) |
| 1217 | *out_nid = r->nid; |
| 1218 | } |
| 1219 | |
| 1220 | /** |
| 1221 | * memblock_set_node - set node ID on memblock regions |
| 1222 | * @base: base of area to set node ID for |
| 1223 | * @size: size of area to set node ID for |
Tang Chen | e7e8de5 | 2014-01-21 15:49:26 -0800 | [diff] [blame] | 1224 | * @type: memblock type to set node ID for |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1225 | * @nid: node ID to set |
| 1226 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1227 | * Set the nid of memblock @type regions in [@base, @base + @size) to @nid. |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1228 | * Regions which cross the area boundaries are split as necessary. |
| 1229 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1230 | * Return: |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1231 | * 0 on success, -errno on failure. |
| 1232 | */ |
| 1233 | int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, |
Tang Chen | e7e8de5 | 2014-01-21 15:49:26 -0800 | [diff] [blame] | 1234 | struct memblock_type *type, int nid) |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1235 | { |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1236 | int start_rgn, end_rgn; |
| 1237 | int i, ret; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1238 | |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1239 | ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); |
| 1240 | if (ret) |
| 1241 | return ret; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1242 | |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1243 | for (i = start_rgn; i < end_rgn; i++) |
Wanpeng Li | e9d24ad | 2012-10-08 16:32:21 -0700 | [diff] [blame] | 1244 | memblock_set_region_node(&type->regions[i], nid); |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1245 | |
| 1246 | memblock_merge_regions(type); |
| 1247 | return 0; |
| 1248 | } |
| 1249 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ |
Alexander Duyck | 837566e | 2019-05-13 17:21:17 -0700 | [diff] [blame] | 1250 | #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT |
| 1251 | /** |
| 1252 | * __next_mem_pfn_range_in_zone - iterator for for_each_*_range_in_zone() |
| 1253 | * |
| 1254 | * @idx: pointer to u64 loop variable |
| 1255 | * @zone: zone in which all of the memory blocks reside |
| 1256 | * @out_spfn: ptr to ulong for start pfn of the range, can be %NULL |
| 1257 | * @out_epfn: ptr to ulong for end pfn of the range, can be %NULL |
| 1258 | * |
| 1259 | * This function is meant to be a zone/pfn specific wrapper for the |
| 1260 | * for_each_mem_range type iterators. Specifically they are used in the |
| 1261 | * deferred memory init routines and as such we were duplicating much of |
| 1262 | * this logic throughout the code. So instead of having it in multiple |
| 1263 | * locations it seemed like it would make more sense to centralize this to |
| 1264 | * one new iterator that does everything they need. |
| 1265 | */ |
| 1266 | void __init_memblock |
| 1267 | __next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone, |
| 1268 | unsigned long *out_spfn, unsigned long *out_epfn) |
| 1269 | { |
| 1270 | int zone_nid = zone_to_nid(zone); |
| 1271 | phys_addr_t spa, epa; |
| 1272 | int nid; |
| 1273 | |
| 1274 | __next_mem_range(idx, zone_nid, MEMBLOCK_NONE, |
| 1275 | &memblock.memory, &memblock.reserved, |
| 1276 | &spa, &epa, &nid); |
| 1277 | |
| 1278 | while (*idx != U64_MAX) { |
| 1279 | unsigned long epfn = PFN_DOWN(epa); |
| 1280 | unsigned long spfn = PFN_UP(spa); |
| 1281 | |
| 1282 | /* |
| 1283 | * Verify the end is at least past the start of the zone and |
| 1284 | * that we have at least one PFN to initialize. |
| 1285 | */ |
| 1286 | if (zone->zone_start_pfn < epfn && spfn < epfn) { |
| 1287 | /* if we went too far just stop searching */ |
| 1288 | if (zone_end_pfn(zone) <= spfn) { |
| 1289 | *idx = U64_MAX; |
| 1290 | break; |
| 1291 | } |
| 1292 | |
| 1293 | if (out_spfn) |
| 1294 | *out_spfn = max(zone->zone_start_pfn, spfn); |
| 1295 | if (out_epfn) |
| 1296 | *out_epfn = min(zone_end_pfn(zone), epfn); |
| 1297 | |
| 1298 | return; |
| 1299 | } |
| 1300 | |
| 1301 | __next_mem_range(idx, zone_nid, MEMBLOCK_NONE, |
| 1302 | &memblock.memory, &memblock.reserved, |
| 1303 | &spa, &epa, &nid); |
| 1304 | } |
| 1305 | |
| 1306 | /* signal end of iteration */ |
| 1307 | if (out_spfn) |
| 1308 | *out_spfn = ULONG_MAX; |
| 1309 | if (out_epfn) |
| 1310 | *out_epfn = 0; |
| 1311 | } |
| 1312 | |
| 1313 | #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */ |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1314 | |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1315 | /** |
| 1316 | * memblock_alloc_range_nid - allocate boot memory block |
| 1317 | * @size: size of memory block to be allocated in bytes |
| 1318 | * @align: alignment of the region and block's size |
| 1319 | * @start: the lower bound of the memory region to allocate (phys address) |
| 1320 | * @end: the upper bound of the memory region to allocate (phys address) |
| 1321 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1322 | * @exact_nid: control the allocation fall back to other nodes |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1323 | * |
| 1324 | * The allocation is performed from memory region limited by |
Cao jin | 9583066 | 2019-11-30 17:56:24 -0800 | [diff] [blame] | 1325 | * memblock.current_limit if @end == %MEMBLOCK_ALLOC_ACCESSIBLE. |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1326 | * |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1327 | * If the specified node can not hold the requested memory and @exact_nid |
| 1328 | * is false, the allocation falls back to any node in the system. |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1329 | * |
| 1330 | * For systems with memory mirroring, the allocation is attempted first |
| 1331 | * from the regions with mirroring enabled and then retried from any |
| 1332 | * memory region. |
| 1333 | * |
| 1334 | * In addition, function sets the min_count to 0 using kmemleak_alloc_phys for |
| 1335 | * allocated boot memory block, so that it is never reported as leaks. |
| 1336 | * |
| 1337 | * Return: |
| 1338 | * Physical address of allocated memory block on success, %0 on failure. |
| 1339 | */ |
Akinobu Mita | 2bfc286 | 2014-06-04 16:06:53 -0700 | [diff] [blame] | 1340 | static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size, |
| 1341 | phys_addr_t align, phys_addr_t start, |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1342 | phys_addr_t end, int nid, |
| 1343 | bool exact_nid) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1344 | { |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1345 | enum memblock_flags flags = choose_memblock_flags(); |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1346 | phys_addr_t found; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1347 | |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1348 | if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) |
| 1349 | nid = NUMA_NO_NODE; |
| 1350 | |
Mike Rapoport | 2f77080 | 2018-10-30 15:10:01 -0700 | [diff] [blame] | 1351 | if (!align) { |
| 1352 | /* Can't use WARNs this early in boot on powerpc */ |
| 1353 | dump_stack(); |
| 1354 | align = SMP_CACHE_BYTES; |
| 1355 | } |
| 1356 | |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1357 | again: |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 1358 | found = memblock_find_in_range_node(size, align, start, end, nid, |
| 1359 | flags); |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1360 | if (found && !memblock_reserve(found, size)) |
| 1361 | goto done; |
| 1362 | |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1363 | if (nid != NUMA_NO_NODE && !exact_nid) { |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1364 | found = memblock_find_in_range_node(size, align, start, |
| 1365 | end, NUMA_NO_NODE, |
| 1366 | flags); |
| 1367 | if (found && !memblock_reserve(found, size)) |
| 1368 | goto done; |
| 1369 | } |
| 1370 | |
| 1371 | if (flags & MEMBLOCK_MIRROR) { |
| 1372 | flags &= ~MEMBLOCK_MIRROR; |
| 1373 | pr_warn("Could not allocate %pap bytes of mirrored memory\n", |
| 1374 | &size); |
| 1375 | goto again; |
| 1376 | } |
| 1377 | |
| 1378 | return 0; |
| 1379 | |
| 1380 | done: |
| 1381 | /* Skip kmemleak for kasan_init() due to high volume. */ |
| 1382 | if (end != MEMBLOCK_ALLOC_KASAN) |
Catalin Marinas | aedf95e | 2014-06-06 14:38:20 -0700 | [diff] [blame] | 1383 | /* |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1384 | * The min_count is set to 0 so that memblock allocated |
| 1385 | * blocks are never reported as leaks. This is because many |
| 1386 | * of these blocks are only referred via the physical |
| 1387 | * address which is not looked up by kmemleak. |
Catalin Marinas | aedf95e | 2014-06-06 14:38:20 -0700 | [diff] [blame] | 1388 | */ |
Catalin Marinas | 9099dae | 2016-10-11 13:55:11 -0700 | [diff] [blame] | 1389 | kmemleak_alloc_phys(found, size, 0, 0); |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1390 | |
| 1391 | return found; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1392 | } |
| 1393 | |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 1394 | /** |
| 1395 | * memblock_phys_alloc_range - allocate a memory block inside specified range |
| 1396 | * @size: size of memory block to be allocated in bytes |
| 1397 | * @align: alignment of the region and block's size |
| 1398 | * @start: the lower bound of the memory region to allocate (physical address) |
| 1399 | * @end: the upper bound of the memory region to allocate (physical address) |
| 1400 | * |
| 1401 | * Allocate @size bytes in the between @start and @end. |
| 1402 | * |
| 1403 | * Return: physical address of the allocated memory block on success, |
| 1404 | * %0 on failure. |
| 1405 | */ |
Mike Rapoport | 8a770c2 | 2019-03-11 23:29:16 -0700 | [diff] [blame] | 1406 | phys_addr_t __init memblock_phys_alloc_range(phys_addr_t size, |
| 1407 | phys_addr_t align, |
| 1408 | phys_addr_t start, |
| 1409 | phys_addr_t end) |
Akinobu Mita | 2bfc286 | 2014-06-04 16:06:53 -0700 | [diff] [blame] | 1410 | { |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1411 | return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE, |
| 1412 | false); |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1413 | } |
| 1414 | |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 1415 | /** |
| 1416 | * memblock_phys_alloc_try_nid - allocate a memory block from specified MUMA node |
| 1417 | * @size: size of memory block to be allocated in bytes |
| 1418 | * @align: alignment of the region and block's size |
| 1419 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
| 1420 | * |
| 1421 | * Allocates memory block from the specified NUMA node. If the node |
| 1422 | * has no available memory, attempts to allocated from any node in the |
| 1423 | * system. |
| 1424 | * |
| 1425 | * Return: physical address of the allocated memory block on success, |
| 1426 | * %0 on failure. |
| 1427 | */ |
Mike Rapoport | 9a8dd70 | 2018-10-30 15:07:59 -0700 | [diff] [blame] | 1428 | phys_addr_t __init memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid) |
Benjamin Herrenschmidt | 9d1e249 | 2010-07-06 15:39:17 -0700 | [diff] [blame] | 1429 | { |
Mike Rapoport | 3375557 | 2019-03-11 23:29:21 -0700 | [diff] [blame] | 1430 | return memblock_alloc_range_nid(size, align, 0, |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1431 | MEMBLOCK_ALLOC_ACCESSIBLE, nid, false); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1432 | } |
| 1433 | |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1434 | /** |
Mike Rapoport | eb31d55 | 2018-10-30 15:08:04 -0700 | [diff] [blame] | 1435 | * memblock_alloc_internal - allocate boot memory block |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1436 | * @size: size of memory block to be allocated in bytes |
| 1437 | * @align: alignment of the region and block's size |
| 1438 | * @min_addr: the lower bound of the memory region to allocate (phys address) |
| 1439 | * @max_addr: the upper bound of the memory region to allocate (phys address) |
| 1440 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1441 | * @exact_nid: control the allocation fall back to other nodes |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1442 | * |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1443 | * Allocates memory block using memblock_alloc_range_nid() and |
| 1444 | * converts the returned physical address to virtual. |
| 1445 | * |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1446 | * The @min_addr limit is dropped if it can not be satisfied and the allocation |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1447 | * will fall back to memory below @min_addr. Other constraints, such |
| 1448 | * as node and mirrored memory will be handled again in |
| 1449 | * memblock_alloc_range_nid(). |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1450 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1451 | * Return: |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1452 | * Virtual address of allocated memory block on success, NULL on failure. |
| 1453 | */ |
Mike Rapoport | eb31d55 | 2018-10-30 15:08:04 -0700 | [diff] [blame] | 1454 | static void * __init memblock_alloc_internal( |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1455 | phys_addr_t size, phys_addr_t align, |
| 1456 | phys_addr_t min_addr, phys_addr_t max_addr, |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1457 | int nid, bool exact_nid) |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1458 | { |
| 1459 | phys_addr_t alloc; |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1460 | |
| 1461 | /* |
| 1462 | * Detect any accidental use of these APIs after slab is ready, as at |
| 1463 | * this moment memblock may be deinitialized already and its |
Mike Rapoport | c6ffc5c | 2018-10-30 15:09:30 -0700 | [diff] [blame] | 1464 | * internal data may be destroyed (after execution of memblock_free_all) |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1465 | */ |
| 1466 | if (WARN_ON_ONCE(slab_is_available())) |
| 1467 | return kzalloc_node(size, GFP_NOWAIT, nid); |
| 1468 | |
Mike Rapoport | f3057ad | 2019-10-18 20:20:01 -0700 | [diff] [blame] | 1469 | if (max_addr > memblock.current_limit) |
| 1470 | max_addr = memblock.current_limit; |
| 1471 | |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1472 | alloc = memblock_alloc_range_nid(size, align, min_addr, max_addr, nid, |
| 1473 | exact_nid); |
Mike Rapoport | 2f77080 | 2018-10-30 15:10:01 -0700 | [diff] [blame] | 1474 | |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1475 | /* retry allocation without lower limit */ |
| 1476 | if (!alloc && min_addr) |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1477 | alloc = memblock_alloc_range_nid(size, align, 0, max_addr, nid, |
| 1478 | exact_nid); |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1479 | |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1480 | if (!alloc) |
| 1481 | return NULL; |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1482 | |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1483 | return phys_to_virt(alloc); |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1484 | } |
| 1485 | |
| 1486 | /** |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1487 | * memblock_alloc_exact_nid_raw - allocate boot memory block on the exact node |
| 1488 | * without zeroing memory |
| 1489 | * @size: size of memory block to be allocated in bytes |
| 1490 | * @align: alignment of the region and block's size |
| 1491 | * @min_addr: the lower bound of the memory region from where the allocation |
| 1492 | * is preferred (phys address) |
| 1493 | * @max_addr: the upper bound of the memory region from where the allocation |
| 1494 | * is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to |
| 1495 | * allocate only from memory limited by memblock.current_limit value |
| 1496 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
| 1497 | * |
| 1498 | * Public function, provides additional debug information (including caller |
| 1499 | * info), if enabled. Does not zero allocated memory. |
| 1500 | * |
| 1501 | * Return: |
| 1502 | * Virtual address of allocated memory block on success, NULL on failure. |
| 1503 | */ |
| 1504 | void * __init memblock_alloc_exact_nid_raw( |
| 1505 | phys_addr_t size, phys_addr_t align, |
| 1506 | phys_addr_t min_addr, phys_addr_t max_addr, |
| 1507 | int nid) |
| 1508 | { |
| 1509 | void *ptr; |
| 1510 | |
| 1511 | memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=%pa max_addr=%pa %pS\n", |
| 1512 | __func__, (u64)size, (u64)align, nid, &min_addr, |
| 1513 | &max_addr, (void *)_RET_IP_); |
| 1514 | |
| 1515 | ptr = memblock_alloc_internal(size, align, |
| 1516 | min_addr, max_addr, nid, true); |
| 1517 | if (ptr && size > 0) |
| 1518 | page_init_poison(ptr, size); |
| 1519 | |
| 1520 | return ptr; |
| 1521 | } |
| 1522 | |
| 1523 | /** |
Mike Rapoport | eb31d55 | 2018-10-30 15:08:04 -0700 | [diff] [blame] | 1524 | * memblock_alloc_try_nid_raw - allocate boot memory block without zeroing |
Pavel Tatashin | ea1f5f3 | 2017-11-15 17:36:27 -0800 | [diff] [blame] | 1525 | * memory and without panicking |
| 1526 | * @size: size of memory block to be allocated in bytes |
| 1527 | * @align: alignment of the region and block's size |
| 1528 | * @min_addr: the lower bound of the memory region from where the allocation |
| 1529 | * is preferred (phys address) |
| 1530 | * @max_addr: the upper bound of the memory region from where the allocation |
Mike Rapoport | 97ad108 | 2018-10-30 15:09:44 -0700 | [diff] [blame] | 1531 | * is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to |
Pavel Tatashin | ea1f5f3 | 2017-11-15 17:36:27 -0800 | [diff] [blame] | 1532 | * allocate only from memory limited by memblock.current_limit value |
| 1533 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
| 1534 | * |
| 1535 | * Public function, provides additional debug information (including caller |
| 1536 | * info), if enabled. Does not zero allocated memory, does not panic if request |
| 1537 | * cannot be satisfied. |
| 1538 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1539 | * Return: |
Pavel Tatashin | ea1f5f3 | 2017-11-15 17:36:27 -0800 | [diff] [blame] | 1540 | * Virtual address of allocated memory block on success, NULL on failure. |
| 1541 | */ |
Mike Rapoport | eb31d55 | 2018-10-30 15:08:04 -0700 | [diff] [blame] | 1542 | void * __init memblock_alloc_try_nid_raw( |
Pavel Tatashin | ea1f5f3 | 2017-11-15 17:36:27 -0800 | [diff] [blame] | 1543 | phys_addr_t size, phys_addr_t align, |
| 1544 | phys_addr_t min_addr, phys_addr_t max_addr, |
| 1545 | int nid) |
| 1546 | { |
| 1547 | void *ptr; |
| 1548 | |
Sakari Ailus | d75f773 | 2019-03-25 21:32:28 +0200 | [diff] [blame] | 1549 | memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=%pa max_addr=%pa %pS\n", |
Mike Rapoport | a36aab8 | 2018-08-17 15:47:17 -0700 | [diff] [blame] | 1550 | __func__, (u64)size, (u64)align, nid, &min_addr, |
| 1551 | &max_addr, (void *)_RET_IP_); |
Pavel Tatashin | ea1f5f3 | 2017-11-15 17:36:27 -0800 | [diff] [blame] | 1552 | |
Mike Rapoport | eb31d55 | 2018-10-30 15:08:04 -0700 | [diff] [blame] | 1553 | ptr = memblock_alloc_internal(size, align, |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1554 | min_addr, max_addr, nid, false); |
Pavel Tatashin | ea1f5f3 | 2017-11-15 17:36:27 -0800 | [diff] [blame] | 1555 | if (ptr && size > 0) |
Alexander Duyck | f682a97 | 2018-10-26 15:07:45 -0700 | [diff] [blame] | 1556 | page_init_poison(ptr, size); |
| 1557 | |
Pavel Tatashin | ea1f5f3 | 2017-11-15 17:36:27 -0800 | [diff] [blame] | 1558 | return ptr; |
| 1559 | } |
| 1560 | |
| 1561 | /** |
Mike Rapoport | c0dbe82 | 2019-03-11 23:30:37 -0700 | [diff] [blame] | 1562 | * memblock_alloc_try_nid - allocate boot memory block |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1563 | * @size: size of memory block to be allocated in bytes |
| 1564 | * @align: alignment of the region and block's size |
| 1565 | * @min_addr: the lower bound of the memory region from where the allocation |
| 1566 | * is preferred (phys address) |
| 1567 | * @max_addr: the upper bound of the memory region from where the allocation |
Mike Rapoport | 97ad108 | 2018-10-30 15:09:44 -0700 | [diff] [blame] | 1568 | * is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1569 | * allocate only from memory limited by memblock.current_limit value |
| 1570 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
| 1571 | * |
Mike Rapoport | c0dbe82 | 2019-03-11 23:30:37 -0700 | [diff] [blame] | 1572 | * Public function, provides additional debug information (including caller |
| 1573 | * info), if enabled. This function zeroes the allocated memory. |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1574 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1575 | * Return: |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1576 | * Virtual address of allocated memory block on success, NULL on failure. |
| 1577 | */ |
Mike Rapoport | eb31d55 | 2018-10-30 15:08:04 -0700 | [diff] [blame] | 1578 | void * __init memblock_alloc_try_nid( |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1579 | phys_addr_t size, phys_addr_t align, |
| 1580 | phys_addr_t min_addr, phys_addr_t max_addr, |
| 1581 | int nid) |
| 1582 | { |
| 1583 | void *ptr; |
| 1584 | |
Sakari Ailus | d75f773 | 2019-03-25 21:32:28 +0200 | [diff] [blame] | 1585 | memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=%pa max_addr=%pa %pS\n", |
Mike Rapoport | a36aab8 | 2018-08-17 15:47:17 -0700 | [diff] [blame] | 1586 | __func__, (u64)size, (u64)align, nid, &min_addr, |
| 1587 | &max_addr, (void *)_RET_IP_); |
Mike Rapoport | eb31d55 | 2018-10-30 15:08:04 -0700 | [diff] [blame] | 1588 | ptr = memblock_alloc_internal(size, align, |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1589 | min_addr, max_addr, nid, false); |
Mike Rapoport | c0dbe82 | 2019-03-11 23:30:37 -0700 | [diff] [blame] | 1590 | if (ptr) |
Pavel Tatashin | ea1f5f3 | 2017-11-15 17:36:27 -0800 | [diff] [blame] | 1591 | memset(ptr, 0, size); |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1592 | |
Mike Rapoport | c0dbe82 | 2019-03-11 23:30:37 -0700 | [diff] [blame] | 1593 | return ptr; |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1594 | } |
| 1595 | |
| 1596 | /** |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 1597 | * __memblock_free_late - free pages directly to buddy allocator |
Mike Rapoport | 48a833c | 2018-06-30 17:55:03 +0300 | [diff] [blame] | 1598 | * @base: phys starting address of the boot memory block |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1599 | * @size: size of the boot memory block in bytes |
| 1600 | * |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 1601 | * This is only useful when the memblock allocator has already been torn |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1602 | * down, but we are still initializing the system. Pages are released directly |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 1603 | * to the buddy allocator. |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1604 | */ |
| 1605 | void __init __memblock_free_late(phys_addr_t base, phys_addr_t size) |
| 1606 | { |
Mike Rapoport | a36aab8 | 2018-08-17 15:47:17 -0700 | [diff] [blame] | 1607 | phys_addr_t cursor, end; |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1608 | |
Mike Rapoport | a36aab8 | 2018-08-17 15:47:17 -0700 | [diff] [blame] | 1609 | end = base + size - 1; |
Sakari Ailus | d75f773 | 2019-03-25 21:32:28 +0200 | [diff] [blame] | 1610 | memblock_dbg("%s: [%pa-%pa] %pS\n", |
Mike Rapoport | a36aab8 | 2018-08-17 15:47:17 -0700 | [diff] [blame] | 1611 | __func__, &base, &end, (void *)_RET_IP_); |
Catalin Marinas | 9099dae | 2016-10-11 13:55:11 -0700 | [diff] [blame] | 1612 | kmemleak_free_part_phys(base, size); |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1613 | cursor = PFN_UP(base); |
| 1614 | end = PFN_DOWN(base + size); |
| 1615 | |
| 1616 | for (; cursor < end; cursor++) { |
Mike Rapoport | 7c2ee34 | 2018-10-30 15:09:36 -0700 | [diff] [blame] | 1617 | memblock_free_pages(pfn_to_page(cursor), cursor, 0); |
Arun KS | ca79b0c | 2018-12-28 00:34:29 -0800 | [diff] [blame] | 1618 | totalram_pages_inc(); |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1619 | } |
| 1620 | } |
Benjamin Herrenschmidt | 9d1e249 | 2010-07-06 15:39:17 -0700 | [diff] [blame] | 1621 | |
| 1622 | /* |
| 1623 | * Remaining API functions |
| 1624 | */ |
| 1625 | |
David Gibson | 1f1ffb8a | 2016-02-05 15:36:19 -0800 | [diff] [blame] | 1626 | phys_addr_t __init_memblock memblock_phys_mem_size(void) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1627 | { |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 1628 | return memblock.memory.total_size; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1629 | } |
| 1630 | |
Srikar Dronamraju | 8907de5 | 2016-10-07 16:59:18 -0700 | [diff] [blame] | 1631 | phys_addr_t __init_memblock memblock_reserved_size(void) |
| 1632 | { |
| 1633 | return memblock.reserved.total_size; |
| 1634 | } |
| 1635 | |
Yinghai Lu | 595ad9a | 2013-01-24 12:20:09 -0800 | [diff] [blame] | 1636 | phys_addr_t __init memblock_mem_size(unsigned long limit_pfn) |
| 1637 | { |
| 1638 | unsigned long pages = 0; |
| 1639 | struct memblock_region *r; |
| 1640 | unsigned long start_pfn, end_pfn; |
| 1641 | |
| 1642 | for_each_memblock(memory, r) { |
| 1643 | start_pfn = memblock_region_memory_base_pfn(r); |
| 1644 | end_pfn = memblock_region_memory_end_pfn(r); |
| 1645 | start_pfn = min_t(unsigned long, start_pfn, limit_pfn); |
| 1646 | end_pfn = min_t(unsigned long, end_pfn, limit_pfn); |
| 1647 | pages += end_pfn - start_pfn; |
| 1648 | } |
| 1649 | |
Fabian Frederick | 1676323 | 2014-04-07 15:37:53 -0700 | [diff] [blame] | 1650 | return PFN_PHYS(pages); |
Yinghai Lu | 595ad9a | 2013-01-24 12:20:09 -0800 | [diff] [blame] | 1651 | } |
| 1652 | |
Sam Ravnborg | 0a93ebe | 2011-10-31 17:08:16 -0700 | [diff] [blame] | 1653 | /* lowest address */ |
| 1654 | phys_addr_t __init_memblock memblock_start_of_DRAM(void) |
| 1655 | { |
| 1656 | return memblock.memory.regions[0].base; |
| 1657 | } |
| 1658 | |
Yinghai Lu | 10d0643 | 2010-07-28 15:43:02 +1000 | [diff] [blame] | 1659 | phys_addr_t __init_memblock memblock_end_of_DRAM(void) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1660 | { |
| 1661 | int idx = memblock.memory.cnt - 1; |
| 1662 | |
Benjamin Herrenschmidt | e3239ff | 2010-08-04 14:06:41 +1000 | [diff] [blame] | 1663 | return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1664 | } |
| 1665 | |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1666 | static phys_addr_t __init_memblock __find_max_addr(phys_addr_t limit) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1667 | { |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1668 | phys_addr_t max_addr = PHYS_ADDR_MAX; |
Emil Medve | 136199f | 2014-04-07 15:37:52 -0700 | [diff] [blame] | 1669 | struct memblock_region *r; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1670 | |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1671 | /* |
| 1672 | * translate the memory @limit size into the max address within one of |
| 1673 | * the memory memblock regions, if the @limit exceeds the total size |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1674 | * of those regions, max_addr will keep original value PHYS_ADDR_MAX |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1675 | */ |
Emil Medve | 136199f | 2014-04-07 15:37:52 -0700 | [diff] [blame] | 1676 | for_each_memblock(memory, r) { |
Tejun Heo | c0ce8fe | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1677 | if (limit <= r->size) { |
| 1678 | max_addr = r->base + limit; |
| 1679 | break; |
| 1680 | } |
| 1681 | limit -= r->size; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1682 | } |
| 1683 | |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1684 | return max_addr; |
| 1685 | } |
| 1686 | |
| 1687 | void __init memblock_enforce_memory_limit(phys_addr_t limit) |
| 1688 | { |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1689 | phys_addr_t max_addr = PHYS_ADDR_MAX; |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1690 | |
| 1691 | if (!limit) |
| 1692 | return; |
| 1693 | |
| 1694 | max_addr = __find_max_addr(limit); |
| 1695 | |
| 1696 | /* @limit exceeds the total size of the memory, do nothing */ |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1697 | if (max_addr == PHYS_ADDR_MAX) |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1698 | return; |
| 1699 | |
Tejun Heo | c0ce8fe | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1700 | /* truncate both memory and reserved regions */ |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1701 | memblock_remove_range(&memblock.memory, max_addr, |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1702 | PHYS_ADDR_MAX); |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1703 | memblock_remove_range(&memblock.reserved, max_addr, |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1704 | PHYS_ADDR_MAX); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1705 | } |
| 1706 | |
AKASHI Takahiro | c9ca9b4 | 2017-04-03 11:23:55 +0900 | [diff] [blame] | 1707 | void __init memblock_cap_memory_range(phys_addr_t base, phys_addr_t size) |
| 1708 | { |
| 1709 | int start_rgn, end_rgn; |
| 1710 | int i, ret; |
| 1711 | |
| 1712 | if (!size) |
| 1713 | return; |
| 1714 | |
| 1715 | ret = memblock_isolate_range(&memblock.memory, base, size, |
| 1716 | &start_rgn, &end_rgn); |
| 1717 | if (ret) |
| 1718 | return; |
| 1719 | |
| 1720 | /* remove all the MAP regions */ |
| 1721 | for (i = memblock.memory.cnt - 1; i >= end_rgn; i--) |
| 1722 | if (!memblock_is_nomap(&memblock.memory.regions[i])) |
| 1723 | memblock_remove_region(&memblock.memory, i); |
| 1724 | |
| 1725 | for (i = start_rgn - 1; i >= 0; i--) |
| 1726 | if (!memblock_is_nomap(&memblock.memory.regions[i])) |
| 1727 | memblock_remove_region(&memblock.memory, i); |
| 1728 | |
| 1729 | /* truncate the reserved regions */ |
| 1730 | memblock_remove_range(&memblock.reserved, 0, base); |
| 1731 | memblock_remove_range(&memblock.reserved, |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1732 | base + size, PHYS_ADDR_MAX); |
AKASHI Takahiro | c9ca9b4 | 2017-04-03 11:23:55 +0900 | [diff] [blame] | 1733 | } |
| 1734 | |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1735 | void __init memblock_mem_limit_remove_map(phys_addr_t limit) |
| 1736 | { |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1737 | phys_addr_t max_addr; |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1738 | |
| 1739 | if (!limit) |
| 1740 | return; |
| 1741 | |
| 1742 | max_addr = __find_max_addr(limit); |
| 1743 | |
| 1744 | /* @limit exceeds the total size of the memory, do nothing */ |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1745 | if (max_addr == PHYS_ADDR_MAX) |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1746 | return; |
| 1747 | |
AKASHI Takahiro | c9ca9b4 | 2017-04-03 11:23:55 +0900 | [diff] [blame] | 1748 | memblock_cap_memory_range(0, max_addr); |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1749 | } |
| 1750 | |
Yinghai Lu | cd79481 | 2010-10-11 12:34:09 -0700 | [diff] [blame] | 1751 | static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) |
Benjamin Herrenschmidt | 72d4b0b | 2010-08-04 14:38:47 +1000 | [diff] [blame] | 1752 | { |
| 1753 | unsigned int left = 0, right = type->cnt; |
| 1754 | |
| 1755 | do { |
| 1756 | unsigned int mid = (right + left) / 2; |
| 1757 | |
| 1758 | if (addr < type->regions[mid].base) |
| 1759 | right = mid; |
| 1760 | else if (addr >= (type->regions[mid].base + |
| 1761 | type->regions[mid].size)) |
| 1762 | left = mid + 1; |
| 1763 | else |
| 1764 | return mid; |
| 1765 | } while (left < right); |
| 1766 | return -1; |
| 1767 | } |
| 1768 | |
Yueyi Li | f5a222d | 2018-12-14 14:17:06 -0800 | [diff] [blame] | 1769 | bool __init_memblock memblock_is_reserved(phys_addr_t addr) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1770 | { |
Benjamin Herrenschmidt | 72d4b0b | 2010-08-04 14:38:47 +1000 | [diff] [blame] | 1771 | return memblock_search(&memblock.reserved, addr) != -1; |
| 1772 | } |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1773 | |
Yaowei Bai | b4ad0c7 | 2016-01-14 15:18:54 -0800 | [diff] [blame] | 1774 | bool __init_memblock memblock_is_memory(phys_addr_t addr) |
Benjamin Herrenschmidt | 72d4b0b | 2010-08-04 14:38:47 +1000 | [diff] [blame] | 1775 | { |
| 1776 | return memblock_search(&memblock.memory, addr) != -1; |
| 1777 | } |
| 1778 | |
Yaowei Bai | 937f0c2 | 2018-02-06 15:41:18 -0800 | [diff] [blame] | 1779 | bool __init_memblock memblock_is_map_memory(phys_addr_t addr) |
Ard Biesheuvel | bf3d3cc | 2015-11-30 13:28:15 +0100 | [diff] [blame] | 1780 | { |
| 1781 | int i = memblock_search(&memblock.memory, addr); |
| 1782 | |
| 1783 | if (i == -1) |
| 1784 | return false; |
| 1785 | return !memblock_is_nomap(&memblock.memory.regions[i]); |
| 1786 | } |
| 1787 | |
Yinghai Lu | e76b63f | 2013-09-11 14:22:17 -0700 | [diff] [blame] | 1788 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
| 1789 | int __init_memblock memblock_search_pfn_nid(unsigned long pfn, |
| 1790 | unsigned long *start_pfn, unsigned long *end_pfn) |
| 1791 | { |
| 1792 | struct memblock_type *type = &memblock.memory; |
Fabian Frederick | 1676323 | 2014-04-07 15:37:53 -0700 | [diff] [blame] | 1793 | int mid = memblock_search(type, PFN_PHYS(pfn)); |
Yinghai Lu | e76b63f | 2013-09-11 14:22:17 -0700 | [diff] [blame] | 1794 | |
| 1795 | if (mid == -1) |
| 1796 | return -1; |
| 1797 | |
Fabian Frederick | f7e2f7e | 2014-06-04 16:07:51 -0700 | [diff] [blame] | 1798 | *start_pfn = PFN_DOWN(type->regions[mid].base); |
| 1799 | *end_pfn = PFN_DOWN(type->regions[mid].base + type->regions[mid].size); |
Yinghai Lu | e76b63f | 2013-09-11 14:22:17 -0700 | [diff] [blame] | 1800 | |
| 1801 | return type->regions[mid].nid; |
| 1802 | } |
| 1803 | #endif |
| 1804 | |
Stephen Boyd | eab3094 | 2012-05-24 00:45:21 -0700 | [diff] [blame] | 1805 | /** |
| 1806 | * memblock_is_region_memory - check if a region is a subset of memory |
| 1807 | * @base: base of region to check |
| 1808 | * @size: size of region to check |
| 1809 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1810 | * Check if the region [@base, @base + @size) is a subset of a memory block. |
Stephen Boyd | eab3094 | 2012-05-24 00:45:21 -0700 | [diff] [blame] | 1811 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1812 | * Return: |
Stephen Boyd | eab3094 | 2012-05-24 00:45:21 -0700 | [diff] [blame] | 1813 | * 0 if false, non-zero if true |
| 1814 | */ |
Yaowei Bai | 937f0c2 | 2018-02-06 15:41:18 -0800 | [diff] [blame] | 1815 | bool __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size) |
Benjamin Herrenschmidt | 72d4b0b | 2010-08-04 14:38:47 +1000 | [diff] [blame] | 1816 | { |
Tomi Valkeinen | abb6527 | 2011-01-20 14:44:20 -0800 | [diff] [blame] | 1817 | int idx = memblock_search(&memblock.memory, base); |
Tejun Heo | eb18f1b | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1818 | phys_addr_t end = base + memblock_cap_size(base, &size); |
Benjamin Herrenschmidt | 72d4b0b | 2010-08-04 14:38:47 +1000 | [diff] [blame] | 1819 | |
| 1820 | if (idx == -1) |
Yaowei Bai | 937f0c2 | 2018-02-06 15:41:18 -0800 | [diff] [blame] | 1821 | return false; |
Wei Yang | ef415ef | 2017-02-22 15:45:04 -0800 | [diff] [blame] | 1822 | return (memblock.memory.regions[idx].base + |
Tejun Heo | eb18f1b | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1823 | memblock.memory.regions[idx].size) >= end; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1824 | } |
| 1825 | |
Stephen Boyd | eab3094 | 2012-05-24 00:45:21 -0700 | [diff] [blame] | 1826 | /** |
| 1827 | * memblock_is_region_reserved - check if a region intersects reserved memory |
| 1828 | * @base: base of region to check |
| 1829 | * @size: size of region to check |
| 1830 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1831 | * Check if the region [@base, @base + @size) intersects a reserved |
| 1832 | * memory block. |
Stephen Boyd | eab3094 | 2012-05-24 00:45:21 -0700 | [diff] [blame] | 1833 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1834 | * Return: |
Tang Chen | c5c5c9d | 2015-09-08 15:02:00 -0700 | [diff] [blame] | 1835 | * True if they intersect, false if not. |
Stephen Boyd | eab3094 | 2012-05-24 00:45:21 -0700 | [diff] [blame] | 1836 | */ |
Tang Chen | c5c5c9d | 2015-09-08 15:02:00 -0700 | [diff] [blame] | 1837 | bool __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1838 | { |
Tejun Heo | eb18f1b | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1839 | memblock_cap_size(base, &size); |
Tang Chen | c5c5c9d | 2015-09-08 15:02:00 -0700 | [diff] [blame] | 1840 | return memblock_overlaps_region(&memblock.reserved, base, size); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1841 | } |
| 1842 | |
Yinghai Lu | 6ede1fd | 2012-10-22 16:35:18 -0700 | [diff] [blame] | 1843 | void __init_memblock memblock_trim_memory(phys_addr_t align) |
| 1844 | { |
Yinghai Lu | 6ede1fd | 2012-10-22 16:35:18 -0700 | [diff] [blame] | 1845 | phys_addr_t start, end, orig_start, orig_end; |
Emil Medve | 136199f | 2014-04-07 15:37:52 -0700 | [diff] [blame] | 1846 | struct memblock_region *r; |
Yinghai Lu | 6ede1fd | 2012-10-22 16:35:18 -0700 | [diff] [blame] | 1847 | |
Emil Medve | 136199f | 2014-04-07 15:37:52 -0700 | [diff] [blame] | 1848 | for_each_memblock(memory, r) { |
| 1849 | orig_start = r->base; |
| 1850 | orig_end = r->base + r->size; |
Yinghai Lu | 6ede1fd | 2012-10-22 16:35:18 -0700 | [diff] [blame] | 1851 | start = round_up(orig_start, align); |
| 1852 | end = round_down(orig_end, align); |
| 1853 | |
| 1854 | if (start == orig_start && end == orig_end) |
| 1855 | continue; |
| 1856 | |
| 1857 | if (start < end) { |
Emil Medve | 136199f | 2014-04-07 15:37:52 -0700 | [diff] [blame] | 1858 | r->base = start; |
| 1859 | r->size = end - start; |
Yinghai Lu | 6ede1fd | 2012-10-22 16:35:18 -0700 | [diff] [blame] | 1860 | } else { |
Emil Medve | 136199f | 2014-04-07 15:37:52 -0700 | [diff] [blame] | 1861 | memblock_remove_region(&memblock.memory, |
| 1862 | r - memblock.memory.regions); |
| 1863 | r--; |
Yinghai Lu | 6ede1fd | 2012-10-22 16:35:18 -0700 | [diff] [blame] | 1864 | } |
| 1865 | } |
| 1866 | } |
Benjamin Herrenschmidt | e63075a | 2010-07-06 15:39:01 -0700 | [diff] [blame] | 1867 | |
Yinghai Lu | 3661ca6 | 2010-09-15 13:05:29 -0700 | [diff] [blame] | 1868 | void __init_memblock memblock_set_current_limit(phys_addr_t limit) |
Benjamin Herrenschmidt | e63075a | 2010-07-06 15:39:01 -0700 | [diff] [blame] | 1869 | { |
| 1870 | memblock.current_limit = limit; |
| 1871 | } |
| 1872 | |
Laura Abbott | fec5101 | 2014-02-27 01:23:43 +0100 | [diff] [blame] | 1873 | phys_addr_t __init_memblock memblock_get_current_limit(void) |
| 1874 | { |
| 1875 | return memblock.current_limit; |
| 1876 | } |
| 1877 | |
Heiko Carstens | 0262d9c | 2017-02-24 14:55:59 -0800 | [diff] [blame] | 1878 | static void __init_memblock memblock_dump(struct memblock_type *type) |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1879 | { |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 1880 | phys_addr_t base, end, size; |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 1881 | enum memblock_flags flags; |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 1882 | int idx; |
| 1883 | struct memblock_region *rgn; |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1884 | |
Heiko Carstens | 0262d9c | 2017-02-24 14:55:59 -0800 | [diff] [blame] | 1885 | pr_info(" %s.cnt = 0x%lx\n", type->name, type->cnt); |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1886 | |
Gioh Kim | 66e8b43 | 2017-11-15 17:33:42 -0800 | [diff] [blame] | 1887 | for_each_memblock_type(idx, type, rgn) { |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1888 | char nid_buf[32] = ""; |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1889 | |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1890 | base = rgn->base; |
| 1891 | size = rgn->size; |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 1892 | end = base + size - 1; |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 1893 | flags = rgn->flags; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1894 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
| 1895 | if (memblock_get_region_node(rgn) != MAX_NUMNODES) |
| 1896 | snprintf(nid_buf, sizeof(nid_buf), " on node %d", |
| 1897 | memblock_get_region_node(rgn)); |
| 1898 | #endif |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 1899 | pr_info(" %s[%#x]\t[%pa-%pa], %pa bytes%s flags: %#x\n", |
Heiko Carstens | 0262d9c | 2017-02-24 14:55:59 -0800 | [diff] [blame] | 1900 | type->name, idx, &base, &end, &size, nid_buf, flags); |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1901 | } |
| 1902 | } |
| 1903 | |
Tejun Heo | 4ff7b82 | 2011-12-08 10:22:06 -0800 | [diff] [blame] | 1904 | void __init_memblock __memblock_dump_all(void) |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1905 | { |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1906 | pr_info("MEMBLOCK configuration:\n"); |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 1907 | pr_info(" memory size = %pa reserved size = %pa\n", |
| 1908 | &memblock.memory.total_size, |
| 1909 | &memblock.reserved.total_size); |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1910 | |
Heiko Carstens | 0262d9c | 2017-02-24 14:55:59 -0800 | [diff] [blame] | 1911 | memblock_dump(&memblock.memory); |
| 1912 | memblock_dump(&memblock.reserved); |
Heiko Carstens | 409efd4 | 2017-02-24 14:55:56 -0800 | [diff] [blame] | 1913 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
Heiko Carstens | 0262d9c | 2017-02-24 14:55:59 -0800 | [diff] [blame] | 1914 | memblock_dump(&memblock.physmem); |
Heiko Carstens | 409efd4 | 2017-02-24 14:55:56 -0800 | [diff] [blame] | 1915 | #endif |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1916 | } |
| 1917 | |
Tejun Heo | 1aadc05 | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 1918 | void __init memblock_allow_resize(void) |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1919 | { |
Benjamin Herrenschmidt | 142b45a7 | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 1920 | memblock_can_resize = 1; |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1921 | } |
| 1922 | |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1923 | static int __init early_memblock(char *p) |
| 1924 | { |
| 1925 | if (p && strstr(p, "debug")) |
| 1926 | memblock_debug = 1; |
| 1927 | return 0; |
| 1928 | } |
| 1929 | early_param("memblock", early_memblock); |
| 1930 | |
Mike Rapoport | bda49a8 | 2018-10-30 15:09:40 -0700 | [diff] [blame] | 1931 | static void __init __free_pages_memory(unsigned long start, unsigned long end) |
| 1932 | { |
| 1933 | int order; |
| 1934 | |
| 1935 | while (start < end) { |
| 1936 | order = min(MAX_ORDER - 1UL, __ffs(start)); |
| 1937 | |
| 1938 | while (start + (1UL << order) > end) |
| 1939 | order--; |
| 1940 | |
| 1941 | memblock_free_pages(pfn_to_page(start), start, order); |
| 1942 | |
| 1943 | start += (1UL << order); |
| 1944 | } |
| 1945 | } |
| 1946 | |
| 1947 | static unsigned long __init __free_memory_core(phys_addr_t start, |
| 1948 | phys_addr_t end) |
| 1949 | { |
| 1950 | unsigned long start_pfn = PFN_UP(start); |
| 1951 | unsigned long end_pfn = min_t(unsigned long, |
| 1952 | PFN_DOWN(end), max_low_pfn); |
| 1953 | |
| 1954 | if (start_pfn >= end_pfn) |
| 1955 | return 0; |
| 1956 | |
| 1957 | __free_pages_memory(start_pfn, end_pfn); |
| 1958 | |
| 1959 | return end_pfn - start_pfn; |
| 1960 | } |
| 1961 | |
| 1962 | static unsigned long __init free_low_memory_core_early(void) |
| 1963 | { |
| 1964 | unsigned long count = 0; |
| 1965 | phys_addr_t start, end; |
| 1966 | u64 i; |
| 1967 | |
| 1968 | memblock_clear_hotplug(0, -1); |
| 1969 | |
| 1970 | for_each_reserved_mem_region(i, &start, &end) |
| 1971 | reserve_bootmem_region(start, end); |
| 1972 | |
| 1973 | /* |
| 1974 | * We need to use NUMA_NO_NODE instead of NODE_DATA(0)->node_id |
| 1975 | * because in some case like Node0 doesn't have RAM installed |
| 1976 | * low ram will be on Node1 |
| 1977 | */ |
| 1978 | for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, |
| 1979 | NULL) |
| 1980 | count += __free_memory_core(start, end); |
| 1981 | |
| 1982 | return count; |
| 1983 | } |
| 1984 | |
| 1985 | static int reset_managed_pages_done __initdata; |
| 1986 | |
| 1987 | void reset_node_managed_pages(pg_data_t *pgdat) |
| 1988 | { |
| 1989 | struct zone *z; |
| 1990 | |
| 1991 | for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++) |
Arun KS | 9705bea | 2018-12-28 00:34:24 -0800 | [diff] [blame] | 1992 | atomic_long_set(&z->managed_pages, 0); |
Mike Rapoport | bda49a8 | 2018-10-30 15:09:40 -0700 | [diff] [blame] | 1993 | } |
| 1994 | |
| 1995 | void __init reset_all_zones_managed_pages(void) |
| 1996 | { |
| 1997 | struct pglist_data *pgdat; |
| 1998 | |
| 1999 | if (reset_managed_pages_done) |
| 2000 | return; |
| 2001 | |
| 2002 | for_each_online_pgdat(pgdat) |
| 2003 | reset_node_managed_pages(pgdat); |
| 2004 | |
| 2005 | reset_managed_pages_done = 1; |
| 2006 | } |
| 2007 | |
| 2008 | /** |
| 2009 | * memblock_free_all - release free pages to the buddy allocator |
| 2010 | * |
| 2011 | * Return: the number of pages actually released. |
| 2012 | */ |
| 2013 | unsigned long __init memblock_free_all(void) |
| 2014 | { |
| 2015 | unsigned long pages; |
| 2016 | |
| 2017 | reset_all_zones_managed_pages(); |
| 2018 | |
| 2019 | pages = free_low_memory_core_early(); |
Arun KS | ca79b0c | 2018-12-28 00:34:29 -0800 | [diff] [blame] | 2020 | totalram_pages_add(pages); |
Mike Rapoport | bda49a8 | 2018-10-30 15:09:40 -0700 | [diff] [blame] | 2021 | |
| 2022 | return pages; |
| 2023 | } |
| 2024 | |
Mike Rapoport | 350e88b | 2019-05-13 17:22:59 -0700 | [diff] [blame] | 2025 | #if defined(CONFIG_DEBUG_FS) && defined(CONFIG_ARCH_KEEP_MEMBLOCK) |
Benjamin Herrenschmidt | 6d03b88 | 2010-07-06 15:39:19 -0700 | [diff] [blame] | 2026 | |
| 2027 | static int memblock_debug_show(struct seq_file *m, void *private) |
| 2028 | { |
| 2029 | struct memblock_type *type = m->private; |
| 2030 | struct memblock_region *reg; |
| 2031 | int i; |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 2032 | phys_addr_t end; |
Benjamin Herrenschmidt | 6d03b88 | 2010-07-06 15:39:19 -0700 | [diff] [blame] | 2033 | |
| 2034 | for (i = 0; i < type->cnt; i++) { |
| 2035 | reg = &type->regions[i]; |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 2036 | end = reg->base + reg->size - 1; |
Benjamin Herrenschmidt | 6d03b88 | 2010-07-06 15:39:19 -0700 | [diff] [blame] | 2037 | |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 2038 | seq_printf(m, "%4d: ", i); |
| 2039 | seq_printf(m, "%pa..%pa\n", ®->base, &end); |
Benjamin Herrenschmidt | 6d03b88 | 2010-07-06 15:39:19 -0700 | [diff] [blame] | 2040 | } |
| 2041 | return 0; |
| 2042 | } |
Andy Shevchenko | 5ad3509 | 2018-04-05 16:23:16 -0700 | [diff] [blame] | 2043 | DEFINE_SHOW_ATTRIBUTE(memblock_debug); |
Benjamin Herrenschmidt | 6d03b88 | 2010-07-06 15:39:19 -0700 | [diff] [blame] | 2044 | |
| 2045 | static int __init memblock_init_debugfs(void) |
| 2046 | { |
| 2047 | struct dentry *root = debugfs_create_dir("memblock", NULL); |
Greg Kroah-Hartman | d9f7979 | 2019-03-05 15:46:09 -0800 | [diff] [blame] | 2048 | |
Joe Perches | 0825a6f | 2018-06-14 15:27:58 -0700 | [diff] [blame] | 2049 | debugfs_create_file("memory", 0444, root, |
| 2050 | &memblock.memory, &memblock_debug_fops); |
| 2051 | debugfs_create_file("reserved", 0444, root, |
| 2052 | &memblock.reserved, &memblock_debug_fops); |
Philipp Hachtmann | 70210ed | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 2053 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
Joe Perches | 0825a6f | 2018-06-14 15:27:58 -0700 | [diff] [blame] | 2054 | debugfs_create_file("physmem", 0444, root, |
| 2055 | &memblock.physmem, &memblock_debug_fops); |
Philipp Hachtmann | 70210ed | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 2056 | #endif |
Benjamin Herrenschmidt | 6d03b88 | 2010-07-06 15:39:19 -0700 | [diff] [blame] | 2057 | |
| 2058 | return 0; |
| 2059 | } |
| 2060 | __initcall(memblock_init_debugfs); |
| 2061 | |
| 2062 | #endif /* CONFIG_DEBUG_FS */ |