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 | 142b45a | 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 |
David Hildenbrand | 7764990 | 2020-07-01 16:18:29 +0200 | [diff] [blame] | 47 | * * ``physmem`` - describes the actual physical memory available during |
| 48 | * boot regardless of the possible restrictions and memory hot(un)plug; |
| 49 | * the ``physmem`` type is only available on some architectures. |
Mike Rapoport | 3e039c5 | 2018-06-30 17:55:05 +0300 | [diff] [blame] | 50 | * |
Mauro Carvalho Chehab | 9303c9d | 2020-09-25 12:01:25 +0200 | [diff] [blame] | 51 | * Each region is represented by struct memblock_region that |
Mike Rapoport | 3e039c5 | 2018-06-30 17:55:05 +0300 | [diff] [blame] | 52 | * defines the region extents, its attributes and NUMA node id on NUMA |
Mauro Carvalho Chehab | 1bf162e | 2020-09-28 15:50:33 +0200 | [diff] [blame] | 53 | * systems. Every memory type is described by the struct memblock_type |
| 54 | * which contains an array of memory regions along with |
David Hildenbrand | 7764990 | 2020-07-01 16:18:29 +0200 | [diff] [blame] | 55 | * the allocator metadata. The "memory" and "reserved" types are nicely |
Mauro Carvalho Chehab | 9303c9d | 2020-09-25 12:01:25 +0200 | [diff] [blame] | 56 | * wrapped with struct memblock. This structure is statically |
David Hildenbrand | 7764990 | 2020-07-01 16:18:29 +0200 | [diff] [blame] | 57 | * initialized at build time. The region arrays are initially sized to |
| 58 | * %INIT_MEMBLOCK_REGIONS for "memory" and %INIT_MEMBLOCK_RESERVED_REGIONS |
| 59 | * for "reserved". The region array for "physmem" is initially sized to |
| 60 | * %INIT_PHYSMEM_REGIONS. |
Cao jin | 6e5af9a | 2019-11-30 17:56:21 -0800 | [diff] [blame] | 61 | * The memblock_allow_resize() enables automatic resizing of the region |
| 62 | * arrays during addition of new regions. This feature should be used |
| 63 | * with care so that memory allocated for the region array will not |
| 64 | * overlap with areas that should be reserved, for example initrd. |
Mike Rapoport | 3e039c5 | 2018-06-30 17:55:05 +0300 | [diff] [blame] | 65 | * |
| 66 | * The early architecture setup should tell memblock what the physical |
Cao jin | 6e5af9a | 2019-11-30 17:56:21 -0800 | [diff] [blame] | 67 | * memory layout is by using memblock_add() or memblock_add_node() |
| 68 | * functions. The first function does not assign the region to a NUMA |
| 69 | * node and it is appropriate for UMA systems. Yet, it is possible to |
| 70 | * use it on NUMA systems as well and assign the region to a NUMA node |
| 71 | * later in the setup process using memblock_set_node(). The |
| 72 | * memblock_add_node() performs such an assignment directly. |
Mike Rapoport | 3e039c5 | 2018-06-30 17:55:05 +0300 | [diff] [blame] | 73 | * |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 74 | * Once memblock is setup the memory can be allocated using one of the |
| 75 | * API variants: |
| 76 | * |
Cao jin | 6e5af9a | 2019-11-30 17:56:21 -0800 | [diff] [blame] | 77 | * * memblock_phys_alloc*() - these functions return the **physical** |
| 78 | * address of the allocated memory |
| 79 | * * memblock_alloc*() - these functions return the **virtual** address |
| 80 | * of the allocated memory. |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 81 | * |
Ethon Paul | df1758d | 2020-06-04 16:49:16 -0700 | [diff] [blame] | 82 | * Note, that both API variants use implicit assumptions about allowed |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 83 | * memory ranges and the fallback methods. Consult the documentation |
Cao jin | 6e5af9a | 2019-11-30 17:56:21 -0800 | [diff] [blame] | 84 | * of memblock_alloc_internal() and memblock_alloc_range_nid() |
| 85 | * functions for more elaborate description. |
Mike Rapoport | 3e039c5 | 2018-06-30 17:55:05 +0300 | [diff] [blame] | 86 | * |
Cao jin | 6e5af9a | 2019-11-30 17:56:21 -0800 | [diff] [blame] | 87 | * As the system boot progresses, the architecture specific mem_init() |
| 88 | * function frees all the memory to the buddy page allocator. |
Mike Rapoport | 3e039c5 | 2018-06-30 17:55:05 +0300 | [diff] [blame] | 89 | * |
Cao jin | 6e5af9a | 2019-11-30 17:56:21 -0800 | [diff] [blame] | 90 | * Unless an architecture enables %CONFIG_ARCH_KEEP_MEMBLOCK, the |
David Hildenbrand | 7764990 | 2020-07-01 16:18:29 +0200 | [diff] [blame] | 91 | * memblock data structures (except "physmem") will be discarded after the |
| 92 | * system initialization completes. |
Mike Rapoport | 3e039c5 | 2018-06-30 17:55:05 +0300 | [diff] [blame] | 93 | */ |
| 94 | |
Mike Rapoport | a9ee6cf | 2021-06-28 19:43:01 -0700 | [diff] [blame] | 95 | #ifndef CONFIG_NUMA |
Mike Rapoport | bda49a8 | 2018-10-30 15:09:40 -0700 | [diff] [blame] | 96 | struct pglist_data __refdata contig_page_data; |
| 97 | EXPORT_SYMBOL(contig_page_data); |
| 98 | #endif |
| 99 | |
| 100 | unsigned long max_low_pfn; |
| 101 | unsigned long min_low_pfn; |
| 102 | unsigned long max_pfn; |
| 103 | unsigned long long max_possible_pfn; |
| 104 | |
Tejun Heo | fe091c2 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 105 | 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] | 106 | 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] | 107 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
David Hildenbrand | 7764990 | 2020-07-01 16:18:29 +0200 | [diff] [blame] | 108 | static struct memblock_region memblock_physmem_init_regions[INIT_PHYSMEM_REGIONS]; |
Philipp Hachtmann | 70210ed | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 109 | #endif |
Tejun Heo | fe091c2 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 110 | |
| 111 | struct memblock memblock __initdata_memblock = { |
| 112 | .memory.regions = memblock_memory_init_regions, |
| 113 | .memory.cnt = 1, /* empty dummy entry */ |
| 114 | .memory.max = INIT_MEMBLOCK_REGIONS, |
Heiko Carstens | 0262d9c | 2017-02-24 14:55:59 -0800 | [diff] [blame] | 115 | .memory.name = "memory", |
Tejun Heo | fe091c2 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 116 | |
| 117 | .reserved.regions = memblock_reserved_init_regions, |
| 118 | .reserved.cnt = 1, /* empty dummy entry */ |
Ard Biesheuvel | 8a5b403d | 2019-02-15 13:33:32 +0100 | [diff] [blame] | 119 | .reserved.max = INIT_MEMBLOCK_RESERVED_REGIONS, |
Heiko Carstens | 0262d9c | 2017-02-24 14:55:59 -0800 | [diff] [blame] | 120 | .reserved.name = "reserved", |
Tejun Heo | fe091c2 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 121 | |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 122 | .bottom_up = false, |
Tejun Heo | fe091c2 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 123 | .current_limit = MEMBLOCK_ALLOC_ANYWHERE, |
| 124 | }; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 125 | |
David Hildenbrand | 7764990 | 2020-07-01 16:18:29 +0200 | [diff] [blame] | 126 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
| 127 | struct memblock_type physmem = { |
| 128 | .regions = memblock_physmem_init_regions, |
| 129 | .cnt = 1, /* empty dummy entry */ |
| 130 | .max = INIT_PHYSMEM_REGIONS, |
| 131 | .name = "physmem", |
| 132 | }; |
| 133 | #endif |
| 134 | |
Mike Rapoport | 9f3d5ea | 2020-10-13 16:58:25 -0700 | [diff] [blame] | 135 | /* |
| 136 | * keep a pointer to &memblock.memory in the text section to use it in |
| 137 | * __next_mem_range() and its helpers. |
| 138 | * For architectures that do not keep memblock data after init, this |
| 139 | * pointer will be reset to NULL at memblock_discard() |
| 140 | */ |
| 141 | static __refdata struct memblock_type *memblock_memory = &memblock.memory; |
| 142 | |
Mike Rapoport | cd991db | 2020-10-13 16:57:49 -0700 | [diff] [blame] | 143 | #define for_each_memblock_type(i, memblock_type, rgn) \ |
| 144 | for (i = 0, rgn = &memblock_type->regions[0]; \ |
| 145 | i < memblock_type->cnt; \ |
| 146 | i++, rgn = &memblock_type->regions[i]) |
| 147 | |
Mike Rapoport | 87c5587 | 2020-10-13 16:57:54 -0700 | [diff] [blame] | 148 | #define memblock_dbg(fmt, ...) \ |
| 149 | do { \ |
| 150 | if (memblock_debug) \ |
| 151 | pr_info(fmt, ##__VA_ARGS__); \ |
| 152 | } while (0) |
| 153 | |
| 154 | static int memblock_debug __initdata_memblock; |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 155 | static bool system_has_some_mirror __initdata_memblock = false; |
Tejun Heo | 1aadc05 | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 156 | static int memblock_can_resize __initdata_memblock; |
Gavin Shan | 181eb39 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 157 | static int memblock_memory_in_slab __initdata_memblock = 0; |
| 158 | static int memblock_reserved_in_slab __initdata_memblock = 0; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 159 | |
Mike Rapoport | c366ea8 | 2019-03-11 23:29:46 -0700 | [diff] [blame] | 160 | static enum memblock_flags __init_memblock choose_memblock_flags(void) |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 161 | { |
| 162 | return system_has_some_mirror ? MEMBLOCK_MIRROR : MEMBLOCK_NONE; |
| 163 | } |
| 164 | |
Tejun Heo | eb18f1b | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 165 | /* adjust *@size so that (@base + *@size) doesn't overflow, return new size */ |
| 166 | static inline phys_addr_t memblock_cap_size(phys_addr_t base, phys_addr_t *size) |
| 167 | { |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 168 | return *size = min(*size, PHYS_ADDR_MAX - base); |
Tejun Heo | eb18f1b | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 169 | } |
| 170 | |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 171 | /* |
| 172 | * Address comparison utilities |
| 173 | */ |
Yinghai Lu | 10d0643 | 2010-07-28 15:43:02 +1000 | [diff] [blame] | 174 | 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] | 175 | phys_addr_t base2, phys_addr_t size2) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 176 | { |
| 177 | return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); |
| 178 | } |
| 179 | |
Tang Chen | 95cf82e | 2015-09-08 15:02:03 -0700 | [diff] [blame] | 180 | bool __init_memblock memblock_overlaps_region(struct memblock_type *type, |
H Hartley Sweeten | 2d7d3eb | 2011-10-31 17:09:15 -0700 | [diff] [blame] | 181 | phys_addr_t base, phys_addr_t size) |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 182 | { |
| 183 | unsigned long i; |
| 184 | |
Mike Rapoport | 023accf | 2021-06-30 09:12:13 +0300 | [diff] [blame] | 185 | memblock_cap_size(base, &size); |
| 186 | |
Alexander Kuleshov | f14516f | 2016-01-14 15:20:39 -0800 | [diff] [blame] | 187 | for (i = 0; i < type->cnt; i++) |
| 188 | if (memblock_addrs_overlap(base, size, type->regions[i].base, |
| 189 | type->regions[i].size)) |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 190 | break; |
Tang Chen | c5c5c9d | 2015-09-08 15:02:00 -0700 | [diff] [blame] | 191 | return i < type->cnt; |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 192 | } |
| 193 | |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 194 | /** |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 195 | * __memblock_find_range_bottom_up - find free area utility in bottom-up |
| 196 | * @start: start of candidate range |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 197 | * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or |
| 198 | * %MEMBLOCK_ALLOC_ACCESSIBLE |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 199 | * @size: size of free area to find |
| 200 | * @align: alignment of free area to find |
Grygorii Strashko | b115423 | 2014-01-21 15:50:16 -0800 | [diff] [blame] | 201 | * @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] | 202 | * @flags: pick from blocks based on memory attributes |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 203 | * |
| 204 | * Utility called from memblock_find_in_range_node(), find free area bottom-up. |
| 205 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 206 | * Return: |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 207 | * Found address on success, 0 on failure. |
| 208 | */ |
| 209 | static phys_addr_t __init_memblock |
| 210 | __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] | 211 | phys_addr_t size, phys_addr_t align, int nid, |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 212 | enum memblock_flags flags) |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 213 | { |
| 214 | phys_addr_t this_start, this_end, cand; |
| 215 | u64 i; |
| 216 | |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 217 | 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] | 218 | this_start = clamp(this_start, start, end); |
| 219 | this_end = clamp(this_end, start, end); |
| 220 | |
| 221 | cand = round_up(this_start, align); |
| 222 | if (cand < this_end && this_end - cand >= size) |
| 223 | return cand; |
| 224 | } |
| 225 | |
| 226 | return 0; |
| 227 | } |
| 228 | |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 229 | /** |
Tang Chen | 1402899 | 2013-11-12 15:07:57 -0800 | [diff] [blame] | 230 | * __memblock_find_range_top_down - find free area utility, in top-down |
| 231 | * @start: start of candidate range |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 232 | * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or |
| 233 | * %MEMBLOCK_ALLOC_ACCESSIBLE |
Tang Chen | 1402899 | 2013-11-12 15:07:57 -0800 | [diff] [blame] | 234 | * @size: size of free area to find |
| 235 | * @align: alignment of free area to find |
Grygorii Strashko | b115423 | 2014-01-21 15:50:16 -0800 | [diff] [blame] | 236 | * @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] | 237 | * @flags: pick from blocks based on memory attributes |
Tang Chen | 1402899 | 2013-11-12 15:07:57 -0800 | [diff] [blame] | 238 | * |
| 239 | * Utility called from memblock_find_in_range_node(), find free area top-down. |
| 240 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 241 | * Return: |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 242 | * Found address on success, 0 on failure. |
Tang Chen | 1402899 | 2013-11-12 15:07:57 -0800 | [diff] [blame] | 243 | */ |
| 244 | static phys_addr_t __init_memblock |
| 245 | __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] | 246 | phys_addr_t size, phys_addr_t align, int nid, |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 247 | enum memblock_flags flags) |
Tang Chen | 1402899 | 2013-11-12 15:07:57 -0800 | [diff] [blame] | 248 | { |
| 249 | phys_addr_t this_start, this_end, cand; |
| 250 | u64 i; |
| 251 | |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 252 | for_each_free_mem_range_reverse(i, nid, flags, &this_start, &this_end, |
| 253 | NULL) { |
Tang Chen | 1402899 | 2013-11-12 15:07:57 -0800 | [diff] [blame] | 254 | this_start = clamp(this_start, start, end); |
| 255 | this_end = clamp(this_end, start, end); |
| 256 | |
| 257 | if (this_end < size) |
| 258 | continue; |
| 259 | |
| 260 | cand = round_down(this_end - size, align); |
| 261 | if (cand >= this_start) |
| 262 | return cand; |
| 263 | } |
| 264 | |
| 265 | return 0; |
| 266 | } |
| 267 | |
| 268 | /** |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 269 | * 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] | 270 | * @size: size of free area to find |
| 271 | * @align: alignment of free area to find |
Grygorii Strashko | 87029ee | 2014-01-21 15:50:14 -0800 | [diff] [blame] | 272 | * @start: start of candidate range |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 273 | * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or |
| 274 | * %MEMBLOCK_ALLOC_ACCESSIBLE |
Grygorii Strashko | b115423 | 2014-01-21 15:50:16 -0800 | [diff] [blame] | 275 | * @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] | 276 | * @flags: pick from blocks based on memory attributes |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 277 | * |
| 278 | * Find @size free area aligned to @align in the specified range and node. |
| 279 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 280 | * Return: |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 281 | * Found address on success, 0 on failure. |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 282 | */ |
Mike Rapoport | c366ea8 | 2019-03-11 23:29:46 -0700 | [diff] [blame] | 283 | 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] | 284 | phys_addr_t align, phys_addr_t start, |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 285 | phys_addr_t end, int nid, |
| 286 | enum memblock_flags flags) |
Tang Chen | f7210e6 | 2013-02-22 16:33:51 -0800 | [diff] [blame] | 287 | { |
Tang Chen | f7210e6 | 2013-02-22 16:33:51 -0800 | [diff] [blame] | 288 | /* pump up @end */ |
Qian Cai | fed84c7 | 2018-12-28 00:36:29 -0800 | [diff] [blame] | 289 | if (end == MEMBLOCK_ALLOC_ACCESSIBLE || |
| 290 | end == MEMBLOCK_ALLOC_KASAN) |
Tang Chen | f7210e6 | 2013-02-22 16:33:51 -0800 | [diff] [blame] | 291 | end = memblock.current_limit; |
| 292 | |
| 293 | /* avoid allocating the first page */ |
| 294 | start = max_t(phys_addr_t, start, PAGE_SIZE); |
| 295 | end = max(start, end); |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 296 | |
Roman Gushchin | 2dcb396 | 2021-02-04 18:32:36 -0800 | [diff] [blame] | 297 | if (memblock_bottom_up()) |
| 298 | return __memblock_find_range_bottom_up(start, end, size, align, |
| 299 | nid, flags); |
| 300 | else |
| 301 | return __memblock_find_range_top_down(start, end, size, align, |
| 302 | nid, flags); |
Tang Chen | f7210e6 | 2013-02-22 16:33:51 -0800 | [diff] [blame] | 303 | } |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 304 | |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 305 | /** |
| 306 | * memblock_find_in_range - find free area in given range |
| 307 | * @start: start of candidate range |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 308 | * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or |
| 309 | * %MEMBLOCK_ALLOC_ACCESSIBLE |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 310 | * @size: size of free area to find |
| 311 | * @align: alignment of free area to find |
| 312 | * |
| 313 | * Find @size free area aligned to @align in the specified range. |
| 314 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 315 | * Return: |
Tang Chen | 79442ed | 2013-11-12 15:07:59 -0800 | [diff] [blame] | 316 | * Found address on success, 0 on failure. |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 317 | */ |
Mike Rapoport | a7259df | 2021-09-02 15:00:26 -0700 | [diff] [blame] | 318 | static phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start, |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 319 | phys_addr_t end, phys_addr_t size, |
| 320 | phys_addr_t align) |
| 321 | { |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 322 | phys_addr_t ret; |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 323 | enum memblock_flags flags = choose_memblock_flags(); |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 324 | |
| 325 | again: |
| 326 | ret = memblock_find_in_range_node(size, align, start, end, |
| 327 | NUMA_NO_NODE, flags); |
| 328 | |
| 329 | if (!ret && (flags & MEMBLOCK_MIRROR)) { |
| 330 | pr_warn("Could not allocate %pap bytes of mirrored memory\n", |
| 331 | &size); |
| 332 | flags &= ~MEMBLOCK_MIRROR; |
| 333 | goto again; |
| 334 | } |
| 335 | |
| 336 | return ret; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 337 | } |
| 338 | |
Yinghai Lu | 10d0643 | 2010-07-28 15:43:02 +1000 | [diff] [blame] | 339 | 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] | 340 | { |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 341 | type->total_size -= type->regions[r].size; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 342 | memmove(&type->regions[r], &type->regions[r + 1], |
| 343 | (type->cnt - (r + 1)) * sizeof(type->regions[r])); |
Benjamin Herrenschmidt | e3239ff | 2010-08-04 14:06:41 +1000 | [diff] [blame] | 344 | type->cnt--; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 345 | |
Benjamin Herrenschmidt | 8f7a660 | 2011-03-22 16:33:43 -0700 | [diff] [blame] | 346 | /* Special case for empty arrays */ |
| 347 | if (type->cnt == 0) { |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 348 | WARN_ON(type->total_size != 0); |
Benjamin Herrenschmidt | 8f7a660 | 2011-03-22 16:33:43 -0700 | [diff] [blame] | 349 | type->cnt = 1; |
| 350 | type->regions[0].base = 0; |
| 351 | type->regions[0].size = 0; |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 352 | type->regions[0].flags = 0; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 353 | memblock_set_region_node(&type->regions[0], MAX_NUMNODES); |
Benjamin Herrenschmidt | 8f7a660 | 2011-03-22 16:33:43 -0700 | [diff] [blame] | 354 | } |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 355 | } |
| 356 | |
Mike Rapoport | 350e88b | 2019-05-13 17:22:59 -0700 | [diff] [blame] | 357 | #ifndef CONFIG_ARCH_KEEP_MEMBLOCK |
Pavel Tatashin | 3010f87 | 2017-08-18 15:16:05 -0700 | [diff] [blame] | 358 | /** |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 359 | * memblock_discard - discard memory and reserved arrays if they were allocated |
Pavel Tatashin | 3010f87 | 2017-08-18 15:16:05 -0700 | [diff] [blame] | 360 | */ |
| 361 | void __init memblock_discard(void) |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 362 | { |
Pavel Tatashin | 3010f87 | 2017-08-18 15:16:05 -0700 | [diff] [blame] | 363 | phys_addr_t addr, size; |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 364 | |
Pavel Tatashin | 3010f87 | 2017-08-18 15:16:05 -0700 | [diff] [blame] | 365 | if (memblock.reserved.regions != memblock_reserved_init_regions) { |
| 366 | addr = __pa(memblock.reserved.regions); |
| 367 | size = PAGE_ALIGN(sizeof(struct memblock_region) * |
| 368 | memblock.reserved.max); |
Miaohe Lin | fd21a0b | 2022-02-17 22:53:27 +0800 | [diff] [blame^] | 369 | if (memblock_reserved_in_slab) |
| 370 | kfree(memblock.reserved.regions); |
| 371 | else |
| 372 | __memblock_free_late(addr, size); |
Pavel Tatashin | 3010f87 | 2017-08-18 15:16:05 -0700 | [diff] [blame] | 373 | } |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 374 | |
Pavel Tatashin | 91b540f9 | 2017-08-25 15:55:46 -0700 | [diff] [blame] | 375 | if (memblock.memory.regions != memblock_memory_init_regions) { |
Pavel Tatashin | 3010f87 | 2017-08-18 15:16:05 -0700 | [diff] [blame] | 376 | addr = __pa(memblock.memory.regions); |
| 377 | size = PAGE_ALIGN(sizeof(struct memblock_region) * |
| 378 | memblock.memory.max); |
Miaohe Lin | fd21a0b | 2022-02-17 22:53:27 +0800 | [diff] [blame^] | 379 | if (memblock_memory_in_slab) |
| 380 | kfree(memblock.memory.regions); |
| 381 | else |
| 382 | __memblock_free_late(addr, size); |
Pavel Tatashin | 3010f87 | 2017-08-18 15:16:05 -0700 | [diff] [blame] | 383 | } |
Mike Rapoport | 9f3d5ea | 2020-10-13 16:58:25 -0700 | [diff] [blame] | 384 | |
| 385 | memblock_memory = NULL; |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 386 | } |
Philipp Hachtmann | 5e270e2 | 2014-01-23 15:53:11 -0800 | [diff] [blame] | 387 | #endif |
| 388 | |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 389 | /** |
| 390 | * memblock_double_array - double the size of the memblock regions array |
| 391 | * @type: memblock type of the regions array being doubled |
| 392 | * @new_area_start: starting address of memory range to avoid overlap with |
| 393 | * @new_area_size: size of memory range to avoid overlap with |
| 394 | * |
| 395 | * Double the size of the @type regions array. If memblock is being used to |
| 396 | * 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] | 397 | * allocated memory range [@new_area_start, @new_area_start + @new_area_size] |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 398 | * waiting to be reserved, ensure the memory used by the new array does |
| 399 | * not overlap. |
| 400 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 401 | * Return: |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 402 | * 0 on success, -1 on failure. |
| 403 | */ |
| 404 | static int __init_memblock memblock_double_array(struct memblock_type *type, |
| 405 | phys_addr_t new_area_start, |
| 406 | phys_addr_t new_area_size) |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 407 | { |
| 408 | struct memblock_region *new_array, *old_array; |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 409 | phys_addr_t old_alloc_size, new_alloc_size; |
Mike Rapoport | a36aab8 | 2018-08-17 15:47:17 -0700 | [diff] [blame] | 410 | phys_addr_t old_size, new_size, addr, new_end; |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 411 | int use_slab = slab_is_available(); |
Gavin Shan | 181eb39 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 412 | int *in_slab; |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 413 | |
| 414 | /* We don't allow resizing until we know about the reserved regions |
| 415 | * of memory that aren't suitable for allocation |
| 416 | */ |
| 417 | if (!memblock_can_resize) |
| 418 | return -1; |
| 419 | |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 420 | /* Calculate new doubled size */ |
| 421 | old_size = type->max * sizeof(struct memblock_region); |
| 422 | new_size = old_size << 1; |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 423 | /* |
| 424 | * We need to allocated new one align to PAGE_SIZE, |
| 425 | * so we can free them completely later. |
| 426 | */ |
| 427 | old_alloc_size = PAGE_ALIGN(old_size); |
| 428 | new_alloc_size = PAGE_ALIGN(new_size); |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 429 | |
Gavin Shan | 181eb39 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 430 | /* Retrieve the slab flag */ |
| 431 | if (type == &memblock.memory) |
| 432 | in_slab = &memblock_memory_in_slab; |
| 433 | else |
| 434 | in_slab = &memblock_reserved_in_slab; |
| 435 | |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 436 | /* Try to find some space for it */ |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 437 | if (use_slab) { |
| 438 | new_array = kmalloc(new_size, GFP_KERNEL); |
Tejun Heo | 1f5026a | 2011-07-12 09:58:09 +0200 | [diff] [blame] | 439 | addr = new_array ? __pa(new_array) : 0; |
Gavin Shan | 4e2f077 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 440 | } else { |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 441 | /* only exclude range when trying to double reserved.regions */ |
| 442 | if (type != &memblock.reserved) |
| 443 | new_area_start = new_area_size = 0; |
| 444 | |
| 445 | addr = memblock_find_in_range(new_area_start + new_area_size, |
| 446 | memblock.current_limit, |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 447 | new_alloc_size, PAGE_SIZE); |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 448 | if (!addr && new_area_size) |
| 449 | addr = memblock_find_in_range(0, |
Andrew Morton | fd07383 | 2012-07-31 16:42:40 -0700 | [diff] [blame] | 450 | min(new_area_start, memblock.current_limit), |
| 451 | new_alloc_size, PAGE_SIZE); |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 452 | |
Sachin Kamat | 1567486 | 2012-09-04 13:55:05 +0530 | [diff] [blame] | 453 | new_array = addr ? __va(addr) : NULL; |
Gavin Shan | 4e2f077 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 454 | } |
Tejun Heo | 1f5026a | 2011-07-12 09:58:09 +0200 | [diff] [blame] | 455 | if (!addr) { |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 456 | 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] | 457 | type->name, type->max, type->max * 2); |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 458 | return -1; |
| 459 | } |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 460 | |
Mike Rapoport | a36aab8 | 2018-08-17 15:47:17 -0700 | [diff] [blame] | 461 | new_end = addr + new_size - 1; |
| 462 | memblock_dbg("memblock: %s is doubled to %ld at [%pa-%pa]", |
| 463 | type->name, type->max * 2, &addr, &new_end); |
Yinghai Lu | ea9e437 | 2010-07-28 15:13:22 +1000 | [diff] [blame] | 464 | |
Andrew Morton | fd07383 | 2012-07-31 16:42:40 -0700 | [diff] [blame] | 465 | /* |
| 466 | * Found space, we now need to move the array over before we add the |
| 467 | * reserved region since it may be our reserved array itself that is |
| 468 | * full. |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 469 | */ |
| 470 | memcpy(new_array, type->regions, old_size); |
| 471 | memset(new_array + type->max, 0, old_size); |
| 472 | old_array = type->regions; |
| 473 | type->regions = new_array; |
| 474 | type->max <<= 1; |
| 475 | |
Andrew Morton | fd07383 | 2012-07-31 16:42:40 -0700 | [diff] [blame] | 476 | /* 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] | 477 | if (*in_slab) |
| 478 | kfree(old_array); |
| 479 | else if (old_array != memblock_memory_init_regions && |
| 480 | old_array != memblock_reserved_init_regions) |
Linus Torvalds | 77e02cf | 2021-09-14 13:23:22 -0700 | [diff] [blame] | 481 | memblock_free_ptr(old_array, old_alloc_size); |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 482 | |
Andrew Morton | fd07383 | 2012-07-31 16:42:40 -0700 | [diff] [blame] | 483 | /* |
| 484 | * Reserve the new array if that comes from the memblock. Otherwise, we |
| 485 | * needn't do it |
Gavin Shan | 181eb39 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 486 | */ |
| 487 | if (!use_slab) |
Yinghai Lu | 29f6738 | 2012-07-11 14:02:56 -0700 | [diff] [blame] | 488 | BUG_ON(memblock_reserve(addr, new_alloc_size)); |
Gavin Shan | 181eb39 | 2012-05-29 15:06:50 -0700 | [diff] [blame] | 489 | |
| 490 | /* Update slab flag */ |
| 491 | *in_slab = use_slab; |
| 492 | |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 493 | return 0; |
| 494 | } |
| 495 | |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 496 | /** |
| 497 | * memblock_merge_regions - merge neighboring compatible regions |
| 498 | * @type: memblock type to scan |
| 499 | * |
| 500 | * Scan @type and merge neighboring compatible regions. |
| 501 | */ |
| 502 | static void __init_memblock memblock_merge_regions(struct memblock_type *type) |
| 503 | { |
| 504 | int i = 0; |
| 505 | |
| 506 | /* cnt never goes below 1 */ |
| 507 | while (i < type->cnt - 1) { |
| 508 | struct memblock_region *this = &type->regions[i]; |
| 509 | struct memblock_region *next = &type->regions[i + 1]; |
| 510 | |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 511 | if (this->base + this->size != next->base || |
| 512 | memblock_get_region_node(this) != |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 513 | memblock_get_region_node(next) || |
| 514 | this->flags != next->flags) { |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 515 | BUG_ON(this->base + this->size > next->base); |
| 516 | i++; |
| 517 | continue; |
| 518 | } |
| 519 | |
| 520 | this->size += next->size; |
Lin Feng | c0232ae | 2013-01-11 14:31:44 -0800 | [diff] [blame] | 521 | /* move forward from next + 1, index of which is i + 2 */ |
| 522 | memmove(next, next + 1, (type->cnt - (i + 2)) * sizeof(*next)); |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 523 | type->cnt--; |
| 524 | } |
| 525 | } |
| 526 | |
| 527 | /** |
| 528 | * memblock_insert_region - insert new memblock region |
Tang Chen | 209ff86 | 2013-04-29 15:08:41 -0700 | [diff] [blame] | 529 | * @type: memblock type to insert into |
| 530 | * @idx: index for the insertion point |
| 531 | * @base: base address of the new region |
| 532 | * @size: size of the new region |
| 533 | * @nid: node id of the new region |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 534 | * @flags: flags of the new region |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 535 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 536 | * Insert new memblock region [@base, @base + @size) into @type at @idx. |
Alexander Kuleshov | 412d000 | 2016-08-04 15:31:46 -0700 | [diff] [blame] | 537 | * @type must already have extra room to accommodate the new region. |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 538 | */ |
| 539 | static void __init_memblock memblock_insert_region(struct memblock_type *type, |
| 540 | int idx, phys_addr_t base, |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 541 | phys_addr_t size, |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 542 | int nid, |
| 543 | enum memblock_flags flags) |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 544 | { |
| 545 | struct memblock_region *rgn = &type->regions[idx]; |
| 546 | |
| 547 | BUG_ON(type->cnt >= type->max); |
| 548 | memmove(rgn + 1, rgn, (type->cnt - idx) * sizeof(*rgn)); |
| 549 | rgn->base = base; |
| 550 | rgn->size = size; |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 551 | rgn->flags = flags; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 552 | memblock_set_region_node(rgn, nid); |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 553 | type->cnt++; |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 554 | type->total_size += size; |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 555 | } |
| 556 | |
| 557 | /** |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 558 | * memblock_add_range - add new memblock region |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 559 | * @type: memblock type to add new region into |
| 560 | * @base: base address of the new region |
| 561 | * @size: size of the new region |
Tejun Heo | 7fb0bc3 | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 562 | * @nid: nid of the new region |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 563 | * @flags: flags of the new region |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 564 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 565 | * Add new memblock region [@base, @base + @size) into @type. The new region |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 566 | * is allowed to overlap with existing ones - overlaps don't affect already |
| 567 | * existing regions. @type is guaranteed to be minimal (all neighbouring |
| 568 | * compatible regions are merged) after the addition. |
| 569 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 570 | * Return: |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 571 | * 0 on success, -errno on failure. |
| 572 | */ |
Anshuman Khandual | 02634a4 | 2020-01-30 22:14:20 -0800 | [diff] [blame] | 573 | static int __init_memblock memblock_add_range(struct memblock_type *type, |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 574 | phys_addr_t base, phys_addr_t size, |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 575 | int nid, enum memblock_flags flags) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 576 | { |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 577 | bool insert = false; |
Tejun Heo | eb18f1b | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 578 | phys_addr_t obase = base; |
| 579 | phys_addr_t end = base + memblock_cap_size(base, &size); |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 580 | int idx, nr_new; |
| 581 | struct memblock_region *rgn; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 582 | |
Tejun Heo | b3dc627 | 2012-04-20 08:31:34 -0700 | [diff] [blame] | 583 | if (!size) |
| 584 | return 0; |
| 585 | |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 586 | /* special case for empty array */ |
| 587 | if (type->regions[0].size == 0) { |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 588 | WARN_ON(type->cnt != 1 || type->total_size); |
Benjamin Herrenschmidt | e3239ff | 2010-08-04 14:06:41 +1000 | [diff] [blame] | 589 | type->regions[0].base = base; |
| 590 | type->regions[0].size = size; |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 591 | type->regions[0].flags = flags; |
Tejun Heo | 7fb0bc3 | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 592 | memblock_set_region_node(&type->regions[0], nid); |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 593 | type->total_size = size; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 594 | return 0; |
| 595 | } |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 596 | repeat: |
| 597 | /* |
| 598 | * The following is executed twice. Once with %false @insert and |
| 599 | * then with %true. The first counts the number of regions needed |
Alexander Kuleshov | 412d000 | 2016-08-04 15:31:46 -0700 | [diff] [blame] | 600 | * to accommodate the new area. The second actually inserts them. |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 601 | */ |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 602 | base = obase; |
| 603 | nr_new = 0; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 604 | |
Gioh Kim | 66e8b43 | 2017-11-15 17:33:42 -0800 | [diff] [blame] | 605 | for_each_memblock_type(idx, type, rgn) { |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 606 | phys_addr_t rbase = rgn->base; |
| 607 | phys_addr_t rend = rbase + rgn->size; |
| 608 | |
| 609 | if (rbase >= end) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 610 | break; |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 611 | if (rend <= base) |
| 612 | continue; |
| 613 | /* |
| 614 | * @rgn overlaps. If it separates the lower part of new |
| 615 | * area, insert that portion. |
| 616 | */ |
| 617 | if (rbase > base) { |
Mike Rapoport | a9ee6cf | 2021-06-28 19:43:01 -0700 | [diff] [blame] | 618 | #ifdef CONFIG_NUMA |
Wei Yang | c0a2949 | 2015-09-04 15:47:38 -0700 | [diff] [blame] | 619 | WARN_ON(nid != memblock_get_region_node(rgn)); |
| 620 | #endif |
Wei Yang | 4fcab5f | 2015-09-08 14:59:53 -0700 | [diff] [blame] | 621 | WARN_ON(flags != rgn->flags); |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 622 | nr_new++; |
| 623 | if (insert) |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 624 | memblock_insert_region(type, idx++, base, |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 625 | rbase - base, nid, |
| 626 | flags); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 627 | } |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 628 | /* area below @rend is dealt with, forget about it */ |
| 629 | base = min(rend, end); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 630 | } |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 631 | |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 632 | /* insert the remaining portion */ |
| 633 | if (base < end) { |
| 634 | nr_new++; |
| 635 | if (insert) |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 636 | memblock_insert_region(type, idx, base, end - base, |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 637 | nid, flags); |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 638 | } |
| 639 | |
nimisolo | ef3cc4d | 2016-07-26 15:24:56 -0700 | [diff] [blame] | 640 | if (!nr_new) |
| 641 | return 0; |
| 642 | |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 643 | /* |
| 644 | * If this was the first round, resize array and repeat for actual |
| 645 | * insertions; otherwise, merge and return. |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 646 | */ |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 647 | if (!insert) { |
| 648 | while (type->cnt + nr_new > type->max) |
Greg Pearson | 48c3b58 | 2012-06-20 12:53:05 -0700 | [diff] [blame] | 649 | if (memblock_double_array(type, obase, size) < 0) |
Tejun Heo | 784656f9 | 2011-07-12 11:15:55 +0200 | [diff] [blame] | 650 | return -ENOMEM; |
| 651 | insert = true; |
| 652 | goto repeat; |
| 653 | } else { |
| 654 | memblock_merge_regions(type); |
| 655 | return 0; |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 656 | } |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 657 | } |
| 658 | |
Mike Rapoport | 48a833c | 2018-06-30 17:55:03 +0300 | [diff] [blame] | 659 | /** |
| 660 | * memblock_add_node - add new memblock region within a NUMA node |
| 661 | * @base: base address of the new region |
| 662 | * @size: size of the new region |
| 663 | * @nid: nid of the new region |
| 664 | * |
| 665 | * Add new memblock region [@base, @base + @size) to the "memory" |
| 666 | * type. See memblock_add_range() description for mode details |
| 667 | * |
| 668 | * Return: |
| 669 | * 0 on success, -errno on failure. |
| 670 | */ |
Tejun Heo | 7fb0bc3 | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 671 | int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size, |
| 672 | int nid) |
| 673 | { |
Geert Uytterhoeven | 00974b9 | 2021-08-11 10:54:36 +0200 | [diff] [blame] | 674 | phys_addr_t end = base + size - 1; |
| 675 | |
| 676 | memblock_dbg("%s: [%pa-%pa] nid=%d %pS\n", __func__, |
| 677 | &base, &end, nid, (void *)_RET_IP_); |
| 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 | |
Anshuman Khandual | a090d71 | 2020-01-30 22:14:23 -0800 | [diff] [blame] | 697 | memblock_dbg("%s: [%pa-%pa] %pS\n", __func__, |
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 | |
Anshuman Khandual | a090d71 | 2020-01-30 22:14:23 -0800 | [diff] [blame] | 798 | memblock_dbg("%s: [%pa-%pa] %pS\n", __func__, |
Minchan Kim | 25cf23d | 2018-06-07 17:07:35 -0700 | [diff] [blame] | 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 | /** |
Linus Torvalds | 77e02cf | 2021-09-14 13:23:22 -0700 | [diff] [blame] | 805 | * memblock_free_ptr - free boot memory allocation |
| 806 | * @ptr: starting address of the boot memory allocation |
| 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 | */ |
| 812 | void __init_memblock memblock_free_ptr(void *ptr, size_t size) |
| 813 | { |
| 814 | if (ptr) |
| 815 | memblock_free(__pa(ptr), size); |
| 816 | } |
| 817 | |
| 818 | /** |
Mike Rapoport | 4d72868 | 2018-12-28 00:35:29 -0800 | [diff] [blame] | 819 | * memblock_free - free boot memory block |
| 820 | * @base: phys starting address of the boot memory block |
| 821 | * @size: size of the boot memory block in bytes |
| 822 | * |
| 823 | * Free boot memory block previously allocated by memblock_alloc_xx() API. |
| 824 | * The freeing memory will not be released to the buddy allocator. |
| 825 | */ |
Tejun Heo | 581adcb | 2011-12-08 10:22:06 -0800 | [diff] [blame] | 826 | 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] | 827 | { |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 828 | phys_addr_t end = base + size - 1; |
| 829 | |
Anshuman Khandual | a090d71 | 2020-01-30 22:14:23 -0800 | [diff] [blame] | 830 | memblock_dbg("%s: [%pa-%pa] %pS\n", __func__, |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 831 | &base, &end, (void *)_RET_IP_); |
Tejun Heo | 24aa078 | 2011-07-12 11:16:06 +0200 | [diff] [blame] | 832 | |
Catalin Marinas | 9099dae | 2016-10-11 13:55:11 -0700 | [diff] [blame] | 833 | kmemleak_free_part_phys(base, size); |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 834 | return memblock_remove_range(&memblock.reserved, base, size); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 835 | } |
| 836 | |
Alexander Kuleshov | f705ac4 | 2016-05-20 16:57:35 -0700 | [diff] [blame] | 837 | 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] | 838 | { |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 839 | phys_addr_t end = base + size - 1; |
| 840 | |
Anshuman Khandual | a090d71 | 2020-01-30 22:14:23 -0800 | [diff] [blame] | 841 | memblock_dbg("%s: [%pa-%pa] %pS\n", __func__, |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 842 | &base, &end, (void *)_RET_IP_); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 843 | |
Alexander Kuleshov | f705ac4 | 2016-05-20 16:57:35 -0700 | [diff] [blame] | 844 | return memblock_add_range(&memblock.reserved, base, size, MAX_NUMNODES, 0); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 845 | } |
| 846 | |
Anshuman Khandual | 02634a4 | 2020-01-30 22:14:20 -0800 | [diff] [blame] | 847 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
| 848 | int __init_memblock memblock_physmem_add(phys_addr_t base, phys_addr_t size) |
| 849 | { |
| 850 | phys_addr_t end = base + size - 1; |
| 851 | |
| 852 | memblock_dbg("%s: [%pa-%pa] %pS\n", __func__, |
| 853 | &base, &end, (void *)_RET_IP_); |
| 854 | |
David Hildenbrand | 7764990 | 2020-07-01 16:18:29 +0200 | [diff] [blame] | 855 | return memblock_add_range(&physmem, base, size, MAX_NUMNODES, 0); |
Anshuman Khandual | 02634a4 | 2020-01-30 22:14:20 -0800 | [diff] [blame] | 856 | } |
| 857 | #endif |
| 858 | |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 859 | /** |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 860 | * memblock_setclr_flag - set or clear flag for a memory region |
| 861 | * @base: base address of the region |
| 862 | * @size: size of the region |
| 863 | * @set: set or clear the flag |
Haitao Shi | 8958b24 | 2020-12-15 20:47:26 -0800 | [diff] [blame] | 864 | * @flag: the flag to update |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 865 | * |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 866 | * This function isolates region [@base, @base + @size), and sets/clears flag |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 867 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 868 | * Return: 0 on success, -errno on failure. |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 869 | */ |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 870 | static int __init_memblock memblock_setclr_flag(phys_addr_t base, |
| 871 | phys_addr_t size, int set, int flag) |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 872 | { |
| 873 | struct memblock_type *type = &memblock.memory; |
| 874 | int i, ret, start_rgn, end_rgn; |
| 875 | |
| 876 | ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); |
| 877 | if (ret) |
| 878 | return ret; |
| 879 | |
Mike Rapoport | fe14512 | 2019-03-11 23:30:46 -0700 | [diff] [blame] | 880 | for (i = start_rgn; i < end_rgn; i++) { |
| 881 | struct memblock_region *r = &type->regions[i]; |
| 882 | |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 883 | if (set) |
Mike Rapoport | fe14512 | 2019-03-11 23:30:46 -0700 | [diff] [blame] | 884 | r->flags |= flag; |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 885 | else |
Mike Rapoport | fe14512 | 2019-03-11 23:30:46 -0700 | [diff] [blame] | 886 | r->flags &= ~flag; |
| 887 | } |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 888 | |
| 889 | memblock_merge_regions(type); |
| 890 | return 0; |
| 891 | } |
| 892 | |
| 893 | /** |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 894 | * memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG. |
| 895 | * @base: the base phys addr of the region |
| 896 | * @size: the size of the region |
| 897 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 898 | * Return: 0 on success, -errno on failure. |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 899 | */ |
| 900 | int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size) |
| 901 | { |
| 902 | return memblock_setclr_flag(base, size, 1, MEMBLOCK_HOTPLUG); |
| 903 | } |
| 904 | |
| 905 | /** |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 906 | * memblock_clear_hotplug - Clear flag MEMBLOCK_HOTPLUG for a specified region. |
| 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. |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 911 | */ |
| 912 | int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size) |
| 913 | { |
Tony Luck | 4308ce1 | 2014-12-12 16:54:59 -0800 | [diff] [blame] | 914 | return memblock_setclr_flag(base, size, 0, MEMBLOCK_HOTPLUG); |
Tang Chen | 66b16ed | 2014-01-21 15:49:23 -0800 | [diff] [blame] | 915 | } |
| 916 | |
| 917 | /** |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 918 | * memblock_mark_mirror - Mark mirrored memory with flag MEMBLOCK_MIRROR. |
| 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. |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 923 | */ |
| 924 | int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size) |
| 925 | { |
| 926 | system_has_some_mirror = true; |
| 927 | |
| 928 | return memblock_setclr_flag(base, size, 1, MEMBLOCK_MIRROR); |
| 929 | } |
| 930 | |
Ard Biesheuvel | bf3d3cc | 2015-11-30 13:28:15 +0100 | [diff] [blame] | 931 | /** |
| 932 | * memblock_mark_nomap - Mark a memory region with flag MEMBLOCK_NOMAP. |
| 933 | * @base: the base phys addr of the region |
| 934 | * @size: the size of the region |
| 935 | * |
Mike Rapoport | 9092d4f | 2021-06-30 18:51:16 -0700 | [diff] [blame] | 936 | * The memory regions marked with %MEMBLOCK_NOMAP will not be added to the |
| 937 | * direct mapping of the physical memory. These regions will still be |
| 938 | * covered by the memory map. The struct page representing NOMAP memory |
| 939 | * frames in the memory map will be PageReserved() |
| 940 | * |
Mike Rapoport | 658aafc | 2021-10-21 10:09:29 +0300 | [diff] [blame] | 941 | * Note: if the memory being marked %MEMBLOCK_NOMAP was allocated from |
| 942 | * memblock, the caller must inform kmemleak to ignore that memory |
| 943 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 944 | * Return: 0 on success, -errno on failure. |
Ard Biesheuvel | bf3d3cc | 2015-11-30 13:28:15 +0100 | [diff] [blame] | 945 | */ |
| 946 | int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size) |
| 947 | { |
Mike Rapoport | 6c9a545 | 2021-10-21 10:09:28 +0300 | [diff] [blame] | 948 | return memblock_setclr_flag(base, size, 1, MEMBLOCK_NOMAP); |
Ard Biesheuvel | bf3d3cc | 2015-11-30 13:28:15 +0100 | [diff] [blame] | 949 | } |
Tony Luck | a3f5baf | 2015-06-24 16:58:12 -0700 | [diff] [blame] | 950 | |
| 951 | /** |
AKASHI Takahiro | 4c546b8 | 2017-04-03 11:23:54 +0900 | [diff] [blame] | 952 | * memblock_clear_nomap - Clear flag MEMBLOCK_NOMAP for a specified region. |
| 953 | * @base: the base phys addr of the region |
| 954 | * @size: the size of the region |
| 955 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 956 | * Return: 0 on success, -errno on failure. |
AKASHI Takahiro | 4c546b8 | 2017-04-03 11:23:54 +0900 | [diff] [blame] | 957 | */ |
| 958 | int __init_memblock memblock_clear_nomap(phys_addr_t base, phys_addr_t size) |
| 959 | { |
| 960 | return memblock_setclr_flag(base, size, 0, MEMBLOCK_NOMAP); |
| 961 | } |
| 962 | |
Mike Rapoport | 9f3d5ea | 2020-10-13 16:58:25 -0700 | [diff] [blame] | 963 | static bool should_skip_region(struct memblock_type *type, |
| 964 | struct memblock_region *m, |
| 965 | int nid, int flags) |
Mike Rapoport | c9a688a | 2019-03-11 23:30:50 -0700 | [diff] [blame] | 966 | { |
| 967 | int m_nid = memblock_get_region_node(m); |
| 968 | |
Mike Rapoport | 9f3d5ea | 2020-10-13 16:58:25 -0700 | [diff] [blame] | 969 | /* we never skip regions when iterating memblock.reserved or physmem */ |
| 970 | if (type != memblock_memory) |
| 971 | return false; |
| 972 | |
Mike Rapoport | c9a688a | 2019-03-11 23:30:50 -0700 | [diff] [blame] | 973 | /* only memory regions are associated with nodes, check it */ |
| 974 | if (nid != NUMA_NO_NODE && nid != m_nid) |
| 975 | return true; |
| 976 | |
| 977 | /* skip hotpluggable memory regions if needed */ |
Mike Rapoport | 79e482e | 2021-07-23 15:50:26 -0700 | [diff] [blame] | 978 | if (movable_node_is_enabled() && memblock_is_hotpluggable(m) && |
| 979 | !(flags & MEMBLOCK_HOTPLUG)) |
Mike Rapoport | c9a688a | 2019-03-11 23:30:50 -0700 | [diff] [blame] | 980 | return true; |
| 981 | |
| 982 | /* if we want mirror memory skip non-mirror memory regions */ |
| 983 | if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) |
| 984 | return true; |
| 985 | |
| 986 | /* skip nomap memory unless we were asked for it explicitly */ |
| 987 | if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) |
| 988 | return true; |
| 989 | |
| 990 | return false; |
| 991 | } |
| 992 | |
Robin Holt | 8e7a7f8 | 2015-06-30 14:56:41 -0700 | [diff] [blame] | 993 | /** |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 994 | * __next_mem_range - next function for for_each_free_mem_range() etc. |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 995 | * @idx: pointer to u64 loop variable |
Grygorii Strashko | b115423 | 2014-01-21 15:50:16 -0800 | [diff] [blame] | 996 | * @nid: node selector, %NUMA_NO_NODE for all nodes |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 997 | * @flags: pick from blocks based on memory attributes |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 998 | * @type_a: pointer to memblock_type from where the range is taken |
| 999 | * @type_b: pointer to memblock_type which excludes memory from being taken |
Wanpeng Li | dad7557 | 2012-06-20 12:53:01 -0700 | [diff] [blame] | 1000 | * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL |
| 1001 | * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL |
| 1002 | * @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] | 1003 | * |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1004 | * Find the first area from *@idx which matches @nid, fill the out |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1005 | * parameters, and update *@idx for the next iteration. The lower 32bit of |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1006 | * *@idx contains index into type_a and the upper 32bit indexes the |
| 1007 | * 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] | 1008 | * look like the following, |
| 1009 | * |
| 1010 | * 0:[0-16), 1:[32-48), 2:[128-130) |
| 1011 | * |
| 1012 | * The upper 32bit indexes the following regions. |
| 1013 | * |
| 1014 | * 0:[0-0), 1:[16-32), 2:[48-128), 3:[130-MAX) |
| 1015 | * |
| 1016 | * As both region arrays are sorted, the function advances the two indices |
| 1017 | * in lockstep and returns each intersection. |
| 1018 | */ |
David Hildenbrand | 7764990 | 2020-07-01 16:18:29 +0200 | [diff] [blame] | 1019 | void __next_mem_range(u64 *idx, int nid, enum memblock_flags flags, |
| 1020 | struct memblock_type *type_a, |
| 1021 | struct memblock_type *type_b, phys_addr_t *out_start, |
| 1022 | phys_addr_t *out_end, int *out_nid) |
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 | int idx_a = *idx & 0xffffffff; |
| 1025 | int idx_b = *idx >> 32; |
Grygorii Strashko | b115423 | 2014-01-21 15:50:16 -0800 | [diff] [blame] | 1026 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1027 | if (WARN_ONCE(nid == MAX_NUMNODES, |
| 1028 | "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) |
Grygorii Strashko | 560dca27 | 2014-01-21 15:50:55 -0800 | [diff] [blame] | 1029 | nid = NUMA_NO_NODE; |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1030 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1031 | for (; idx_a < type_a->cnt; idx_a++) { |
| 1032 | struct memblock_region *m = &type_a->regions[idx_a]; |
| 1033 | |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1034 | phys_addr_t m_start = m->base; |
| 1035 | phys_addr_t m_end = m->base + m->size; |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1036 | int m_nid = memblock_get_region_node(m); |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1037 | |
Mike Rapoport | 9f3d5ea | 2020-10-13 16:58:25 -0700 | [diff] [blame] | 1038 | if (should_skip_region(type_a, m, nid, flags)) |
Ard Biesheuvel | bf3d3cc | 2015-11-30 13:28:15 +0100 | [diff] [blame] | 1039 | continue; |
| 1040 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1041 | if (!type_b) { |
| 1042 | if (out_start) |
| 1043 | *out_start = m_start; |
| 1044 | if (out_end) |
| 1045 | *out_end = m_end; |
| 1046 | if (out_nid) |
| 1047 | *out_nid = m_nid; |
| 1048 | idx_a++; |
| 1049 | *idx = (u32)idx_a | (u64)idx_b << 32; |
| 1050 | return; |
| 1051 | } |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1052 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1053 | /* scan areas before each reservation */ |
| 1054 | for (; idx_b < type_b->cnt + 1; idx_b++) { |
| 1055 | struct memblock_region *r; |
| 1056 | phys_addr_t r_start; |
| 1057 | phys_addr_t r_end; |
| 1058 | |
| 1059 | r = &type_b->regions[idx_b]; |
| 1060 | r_start = idx_b ? r[-1].base + r[-1].size : 0; |
| 1061 | r_end = idx_b < type_b->cnt ? |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1062 | r->base : PHYS_ADDR_MAX; |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1063 | |
| 1064 | /* |
| 1065 | * if idx_b advanced past idx_a, |
| 1066 | * break out to advance idx_a |
| 1067 | */ |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1068 | if (r_start >= m_end) |
| 1069 | break; |
| 1070 | /* if the two regions intersect, we're done */ |
| 1071 | if (m_start < r_end) { |
| 1072 | if (out_start) |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1073 | *out_start = |
| 1074 | max(m_start, r_start); |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1075 | if (out_end) |
| 1076 | *out_end = min(m_end, r_end); |
| 1077 | if (out_nid) |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1078 | *out_nid = m_nid; |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1079 | /* |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1080 | * The region which ends first is |
| 1081 | * advanced for the next iteration. |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1082 | */ |
| 1083 | if (m_end <= r_end) |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1084 | idx_a++; |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1085 | else |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1086 | idx_b++; |
| 1087 | *idx = (u32)idx_a | (u64)idx_b << 32; |
Tejun Heo | 35fd080 | 2011-07-12 11:15:59 +0200 | [diff] [blame] | 1088 | return; |
| 1089 | } |
| 1090 | } |
| 1091 | } |
| 1092 | |
| 1093 | /* signal end of iteration */ |
| 1094 | *idx = ULLONG_MAX; |
| 1095 | } |
| 1096 | |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1097 | /** |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1098 | * __next_mem_range_rev - generic next function for for_each_*_range_rev() |
| 1099 | * |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1100 | * @idx: pointer to u64 loop variable |
Alexander Kuleshov | ad5ea8c | 2015-09-08 15:04:22 -0700 | [diff] [blame] | 1101 | * @nid: node selector, %NUMA_NO_NODE for all nodes |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 1102 | * @flags: pick from blocks based on memory attributes |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1103 | * @type_a: pointer to memblock_type from where the range is taken |
| 1104 | * @type_b: pointer to memblock_type which excludes memory from being taken |
Wanpeng Li | dad7557 | 2012-06-20 12:53:01 -0700 | [diff] [blame] | 1105 | * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL |
| 1106 | * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL |
| 1107 | * @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] | 1108 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1109 | * Finds the next range from type_a which is not marked as unsuitable |
| 1110 | * in type_b. |
| 1111 | * |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1112 | * Reverse of __next_mem_range(). |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1113 | */ |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 1114 | void __init_memblock __next_mem_range_rev(u64 *idx, int nid, |
| 1115 | enum memblock_flags flags, |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1116 | struct memblock_type *type_a, |
| 1117 | struct memblock_type *type_b, |
| 1118 | phys_addr_t *out_start, |
| 1119 | phys_addr_t *out_end, int *out_nid) |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1120 | { |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1121 | int idx_a = *idx & 0xffffffff; |
| 1122 | int idx_b = *idx >> 32; |
Grygorii Strashko | b115423 | 2014-01-21 15:50:16 -0800 | [diff] [blame] | 1123 | |
Grygorii Strashko | 560dca27 | 2014-01-21 15:50:55 -0800 | [diff] [blame] | 1124 | if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) |
| 1125 | nid = NUMA_NO_NODE; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1126 | |
| 1127 | if (*idx == (u64)ULLONG_MAX) { |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1128 | idx_a = type_a->cnt - 1; |
zijun_hu | e47608a | 2016-08-04 15:32:00 -0700 | [diff] [blame] | 1129 | if (type_b != NULL) |
| 1130 | idx_b = type_b->cnt; |
| 1131 | else |
| 1132 | idx_b = 0; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1133 | } |
| 1134 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1135 | for (; idx_a >= 0; idx_a--) { |
| 1136 | struct memblock_region *m = &type_a->regions[idx_a]; |
| 1137 | |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1138 | phys_addr_t m_start = m->base; |
| 1139 | phys_addr_t m_end = m->base + m->size; |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1140 | int m_nid = memblock_get_region_node(m); |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1141 | |
Mike Rapoport | 9f3d5ea | 2020-10-13 16:58:25 -0700 | [diff] [blame] | 1142 | if (should_skip_region(type_a, m, nid, flags)) |
Ard Biesheuvel | bf3d3cc | 2015-11-30 13:28:15 +0100 | [diff] [blame] | 1143 | continue; |
| 1144 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1145 | if (!type_b) { |
| 1146 | if (out_start) |
| 1147 | *out_start = m_start; |
| 1148 | if (out_end) |
| 1149 | *out_end = m_end; |
| 1150 | if (out_nid) |
| 1151 | *out_nid = m_nid; |
zijun_hu | fb399b4 | 2016-07-28 15:48:56 -0700 | [diff] [blame] | 1152 | idx_a--; |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1153 | *idx = (u32)idx_a | (u64)idx_b << 32; |
| 1154 | return; |
| 1155 | } |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1156 | |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1157 | /* scan areas before each reservation */ |
| 1158 | for (; idx_b >= 0; idx_b--) { |
| 1159 | struct memblock_region *r; |
| 1160 | phys_addr_t r_start; |
| 1161 | phys_addr_t r_end; |
| 1162 | |
| 1163 | r = &type_b->regions[idx_b]; |
| 1164 | r_start = idx_b ? r[-1].base + r[-1].size : 0; |
| 1165 | r_end = idx_b < type_b->cnt ? |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1166 | r->base : PHYS_ADDR_MAX; |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1167 | /* |
| 1168 | * if idx_b advanced past idx_a, |
| 1169 | * break out to advance idx_a |
| 1170 | */ |
| 1171 | |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1172 | if (r_end <= m_start) |
| 1173 | break; |
| 1174 | /* if the two regions intersect, we're done */ |
| 1175 | if (m_end > r_start) { |
| 1176 | if (out_start) |
| 1177 | *out_start = max(m_start, r_start); |
| 1178 | if (out_end) |
| 1179 | *out_end = min(m_end, r_end); |
| 1180 | if (out_nid) |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1181 | *out_nid = m_nid; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1182 | if (m_start >= r_start) |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1183 | idx_a--; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1184 | else |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1185 | idx_b--; |
| 1186 | *idx = (u32)idx_a | (u64)idx_b << 32; |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1187 | return; |
| 1188 | } |
| 1189 | } |
| 1190 | } |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1191 | /* signal end of iteration */ |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1192 | *idx = ULLONG_MAX; |
| 1193 | } |
| 1194 | |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1195 | /* |
Chen Chang | 45e7981 | 2018-11-16 15:08:57 -0800 | [diff] [blame] | 1196 | * Common iterator interface used to define for_each_mem_pfn_range(). |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1197 | */ |
| 1198 | void __init_memblock __next_mem_pfn_range(int *idx, int nid, |
| 1199 | unsigned long *out_start_pfn, |
| 1200 | unsigned long *out_end_pfn, int *out_nid) |
| 1201 | { |
| 1202 | struct memblock_type *type = &memblock.memory; |
| 1203 | struct memblock_region *r; |
Mike Rapoport | d622abf | 2020-06-03 15:56:53 -0700 | [diff] [blame] | 1204 | int r_nid; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1205 | |
| 1206 | while (++*idx < type->cnt) { |
| 1207 | r = &type->regions[*idx]; |
Mike Rapoport | d622abf | 2020-06-03 15:56:53 -0700 | [diff] [blame] | 1208 | r_nid = memblock_get_region_node(r); |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1209 | |
| 1210 | if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) |
| 1211 | continue; |
Mike Rapoport | d622abf | 2020-06-03 15:56:53 -0700 | [diff] [blame] | 1212 | if (nid == MAX_NUMNODES || nid == r_nid) |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1213 | break; |
| 1214 | } |
| 1215 | if (*idx >= type->cnt) { |
| 1216 | *idx = -1; |
| 1217 | return; |
| 1218 | } |
| 1219 | |
| 1220 | if (out_start_pfn) |
| 1221 | *out_start_pfn = PFN_UP(r->base); |
| 1222 | if (out_end_pfn) |
| 1223 | *out_end_pfn = PFN_DOWN(r->base + r->size); |
| 1224 | if (out_nid) |
Mike Rapoport | d622abf | 2020-06-03 15:56:53 -0700 | [diff] [blame] | 1225 | *out_nid = r_nid; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1226 | } |
| 1227 | |
| 1228 | /** |
| 1229 | * memblock_set_node - set node ID on memblock regions |
| 1230 | * @base: base of area to set node ID for |
| 1231 | * @size: size of area to set node ID for |
Tang Chen | e7e8de5 | 2014-01-21 15:49:26 -0800 | [diff] [blame] | 1232 | * @type: memblock type to set node ID for |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1233 | * @nid: node ID to set |
| 1234 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1235 | * 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] | 1236 | * Regions which cross the area boundaries are split as necessary. |
| 1237 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1238 | * Return: |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1239 | * 0 on success, -errno on failure. |
| 1240 | */ |
| 1241 | 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] | 1242 | struct memblock_type *type, int nid) |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1243 | { |
Mike Rapoport | a9ee6cf | 2021-06-28 19:43:01 -0700 | [diff] [blame] | 1244 | #ifdef CONFIG_NUMA |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1245 | int start_rgn, end_rgn; |
| 1246 | int i, ret; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1247 | |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1248 | ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); |
| 1249 | if (ret) |
| 1250 | return ret; |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1251 | |
Tejun Heo | 6a9ceb3 | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1252 | for (i = start_rgn; i < end_rgn; i++) |
Wanpeng Li | e9d24ad | 2012-10-08 16:32:21 -0700 | [diff] [blame] | 1253 | memblock_set_region_node(&type->regions[i], nid); |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1254 | |
| 1255 | memblock_merge_regions(type); |
Mike Rapoport | 3f08a30 | 2020-06-03 15:57:02 -0700 | [diff] [blame] | 1256 | #endif |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1257 | return 0; |
| 1258 | } |
Mike Rapoport | 3f08a30 | 2020-06-03 15:57:02 -0700 | [diff] [blame] | 1259 | |
Alexander Duyck | 837566e | 2019-05-13 17:21:17 -0700 | [diff] [blame] | 1260 | #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT |
| 1261 | /** |
| 1262 | * __next_mem_pfn_range_in_zone - iterator for for_each_*_range_in_zone() |
| 1263 | * |
| 1264 | * @idx: pointer to u64 loop variable |
| 1265 | * @zone: zone in which all of the memory blocks reside |
| 1266 | * @out_spfn: ptr to ulong for start pfn of the range, can be %NULL |
| 1267 | * @out_epfn: ptr to ulong for end pfn of the range, can be %NULL |
| 1268 | * |
| 1269 | * This function is meant to be a zone/pfn specific wrapper for the |
| 1270 | * for_each_mem_range type iterators. Specifically they are used in the |
| 1271 | * deferred memory init routines and as such we were duplicating much of |
| 1272 | * this logic throughout the code. So instead of having it in multiple |
| 1273 | * locations it seemed like it would make more sense to centralize this to |
| 1274 | * one new iterator that does everything they need. |
| 1275 | */ |
| 1276 | void __init_memblock |
| 1277 | __next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone, |
| 1278 | unsigned long *out_spfn, unsigned long *out_epfn) |
| 1279 | { |
| 1280 | int zone_nid = zone_to_nid(zone); |
| 1281 | phys_addr_t spa, epa; |
| 1282 | int nid; |
| 1283 | |
| 1284 | __next_mem_range(idx, zone_nid, MEMBLOCK_NONE, |
| 1285 | &memblock.memory, &memblock.reserved, |
| 1286 | &spa, &epa, &nid); |
| 1287 | |
| 1288 | while (*idx != U64_MAX) { |
| 1289 | unsigned long epfn = PFN_DOWN(epa); |
| 1290 | unsigned long spfn = PFN_UP(spa); |
| 1291 | |
| 1292 | /* |
| 1293 | * Verify the end is at least past the start of the zone and |
| 1294 | * that we have at least one PFN to initialize. |
| 1295 | */ |
| 1296 | if (zone->zone_start_pfn < epfn && spfn < epfn) { |
| 1297 | /* if we went too far just stop searching */ |
| 1298 | if (zone_end_pfn(zone) <= spfn) { |
| 1299 | *idx = U64_MAX; |
| 1300 | break; |
| 1301 | } |
| 1302 | |
| 1303 | if (out_spfn) |
| 1304 | *out_spfn = max(zone->zone_start_pfn, spfn); |
| 1305 | if (out_epfn) |
| 1306 | *out_epfn = min(zone_end_pfn(zone), epfn); |
| 1307 | |
| 1308 | return; |
| 1309 | } |
| 1310 | |
| 1311 | __next_mem_range(idx, zone_nid, MEMBLOCK_NONE, |
| 1312 | &memblock.memory, &memblock.reserved, |
| 1313 | &spa, &epa, &nid); |
| 1314 | } |
| 1315 | |
| 1316 | /* signal end of iteration */ |
| 1317 | if (out_spfn) |
| 1318 | *out_spfn = ULONG_MAX; |
| 1319 | if (out_epfn) |
| 1320 | *out_epfn = 0; |
| 1321 | } |
| 1322 | |
| 1323 | #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */ |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1324 | |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1325 | /** |
| 1326 | * memblock_alloc_range_nid - allocate boot memory block |
| 1327 | * @size: size of memory block to be allocated in bytes |
| 1328 | * @align: alignment of the region and block's size |
| 1329 | * @start: the lower bound of the memory region to allocate (phys address) |
| 1330 | * @end: the upper bound of the memory region to allocate (phys address) |
| 1331 | * @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] | 1332 | * @exact_nid: control the allocation fall back to other nodes |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1333 | * |
| 1334 | * The allocation is performed from memory region limited by |
Cao jin | 9583066 | 2019-11-30 17:56:24 -0800 | [diff] [blame] | 1335 | * memblock.current_limit if @end == %MEMBLOCK_ALLOC_ACCESSIBLE. |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1336 | * |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1337 | * If the specified node can not hold the requested memory and @exact_nid |
| 1338 | * is false, the allocation falls back to any node in the system. |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1339 | * |
| 1340 | * For systems with memory mirroring, the allocation is attempted first |
| 1341 | * from the regions with mirroring enabled and then retried from any |
| 1342 | * memory region. |
| 1343 | * |
| 1344 | * In addition, function sets the min_count to 0 using kmemleak_alloc_phys for |
| 1345 | * allocated boot memory block, so that it is never reported as leaks. |
| 1346 | * |
| 1347 | * Return: |
| 1348 | * Physical address of allocated memory block on success, %0 on failure. |
| 1349 | */ |
Aslan Bakirov | 8676af1 | 2020-04-10 14:32:42 -0700 | [diff] [blame] | 1350 | phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size, |
Akinobu Mita | 2bfc286 | 2014-06-04 16:06:53 -0700 | [diff] [blame] | 1351 | phys_addr_t align, phys_addr_t start, |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1352 | phys_addr_t end, int nid, |
| 1353 | bool exact_nid) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1354 | { |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1355 | enum memblock_flags flags = choose_memblock_flags(); |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1356 | phys_addr_t found; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1357 | |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1358 | if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) |
| 1359 | nid = NUMA_NO_NODE; |
| 1360 | |
Mike Rapoport | 2f77080 | 2018-10-30 15:10:01 -0700 | [diff] [blame] | 1361 | if (!align) { |
| 1362 | /* Can't use WARNs this early in boot on powerpc */ |
| 1363 | dump_stack(); |
| 1364 | align = SMP_CACHE_BYTES; |
| 1365 | } |
| 1366 | |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1367 | again: |
Tony Luck | fc6daaf | 2015-06-24 16:58:09 -0700 | [diff] [blame] | 1368 | found = memblock_find_in_range_node(size, align, start, end, nid, |
| 1369 | flags); |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1370 | if (found && !memblock_reserve(found, size)) |
| 1371 | goto done; |
| 1372 | |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1373 | if (nid != NUMA_NO_NODE && !exact_nid) { |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1374 | found = memblock_find_in_range_node(size, align, start, |
| 1375 | end, NUMA_NO_NODE, |
| 1376 | flags); |
| 1377 | if (found && !memblock_reserve(found, size)) |
| 1378 | goto done; |
| 1379 | } |
| 1380 | |
| 1381 | if (flags & MEMBLOCK_MIRROR) { |
| 1382 | flags &= ~MEMBLOCK_MIRROR; |
| 1383 | pr_warn("Could not allocate %pap bytes of mirrored memory\n", |
| 1384 | &size); |
| 1385 | goto again; |
| 1386 | } |
| 1387 | |
| 1388 | return 0; |
| 1389 | |
| 1390 | done: |
| 1391 | /* Skip kmemleak for kasan_init() due to high volume. */ |
| 1392 | if (end != MEMBLOCK_ALLOC_KASAN) |
Catalin Marinas | aedf95e | 2014-06-06 14:38:20 -0700 | [diff] [blame] | 1393 | /* |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1394 | * The min_count is set to 0 so that memblock allocated |
| 1395 | * blocks are never reported as leaks. This is because many |
| 1396 | * of these blocks are only referred via the physical |
| 1397 | * address which is not looked up by kmemleak. |
Catalin Marinas | aedf95e | 2014-06-06 14:38:20 -0700 | [diff] [blame] | 1398 | */ |
Catalin Marinas | 9099dae | 2016-10-11 13:55:11 -0700 | [diff] [blame] | 1399 | kmemleak_alloc_phys(found, size, 0, 0); |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1400 | |
| 1401 | return found; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1402 | } |
| 1403 | |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 1404 | /** |
| 1405 | * memblock_phys_alloc_range - allocate a memory block inside specified range |
| 1406 | * @size: size of memory block to be allocated in bytes |
| 1407 | * @align: alignment of the region and block's size |
| 1408 | * @start: the lower bound of the memory region to allocate (physical address) |
| 1409 | * @end: the upper bound of the memory region to allocate (physical address) |
| 1410 | * |
| 1411 | * Allocate @size bytes in the between @start and @end. |
| 1412 | * |
| 1413 | * Return: physical address of the allocated memory block on success, |
| 1414 | * %0 on failure. |
| 1415 | */ |
Mike Rapoport | 8a770c2 | 2019-03-11 23:29:16 -0700 | [diff] [blame] | 1416 | phys_addr_t __init memblock_phys_alloc_range(phys_addr_t size, |
| 1417 | phys_addr_t align, |
| 1418 | phys_addr_t start, |
| 1419 | phys_addr_t end) |
Akinobu Mita | 2bfc286 | 2014-06-04 16:06:53 -0700 | [diff] [blame] | 1420 | { |
Faiyaz Mohammed | b5cf2d6 | 2020-11-16 10:14:04 +0530 | [diff] [blame] | 1421 | memblock_dbg("%s: %llu bytes align=0x%llx from=%pa max_addr=%pa %pS\n", |
| 1422 | __func__, (u64)size, (u64)align, &start, &end, |
| 1423 | (void *)_RET_IP_); |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1424 | return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE, |
| 1425 | false); |
Tejun Heo | 7bd0b0f | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 1426 | } |
| 1427 | |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 1428 | /** |
Levi Yun | 17cbe03 | 2021-01-20 21:28:18 +0900 | [diff] [blame] | 1429 | * memblock_phys_alloc_try_nid - allocate a memory block from specified NUMA node |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 1430 | * @size: size of memory block to be allocated in bytes |
| 1431 | * @align: alignment of the region and block's size |
| 1432 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
| 1433 | * |
| 1434 | * Allocates memory block from the specified NUMA node. If the node |
| 1435 | * has no available memory, attempts to allocated from any node in the |
| 1436 | * system. |
| 1437 | * |
| 1438 | * Return: physical address of the allocated memory block on success, |
| 1439 | * %0 on failure. |
| 1440 | */ |
Mike Rapoport | 9a8dd70 | 2018-10-30 15:07:59 -0700 | [diff] [blame] | 1441 | 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] | 1442 | { |
Mike Rapoport | 3375557 | 2019-03-11 23:29:21 -0700 | [diff] [blame] | 1443 | return memblock_alloc_range_nid(size, align, 0, |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1444 | MEMBLOCK_ALLOC_ACCESSIBLE, nid, false); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1445 | } |
| 1446 | |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1447 | /** |
Mike Rapoport | eb31d55 | 2018-10-30 15:08:04 -0700 | [diff] [blame] | 1448 | * memblock_alloc_internal - allocate boot memory block |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1449 | * @size: size of memory block to be allocated in bytes |
| 1450 | * @align: alignment of the region and block's size |
| 1451 | * @min_addr: the lower bound of the memory region to allocate (phys address) |
| 1452 | * @max_addr: the upper bound of the memory region to allocate (phys address) |
| 1453 | * @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] | 1454 | * @exact_nid: control the allocation fall back to other nodes |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1455 | * |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1456 | * Allocates memory block using memblock_alloc_range_nid() and |
| 1457 | * converts the returned physical address to virtual. |
| 1458 | * |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1459 | * 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] | 1460 | * will fall back to memory below @min_addr. Other constraints, such |
| 1461 | * as node and mirrored memory will be handled again in |
| 1462 | * memblock_alloc_range_nid(). |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1463 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1464 | * Return: |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1465 | * Virtual address of allocated memory block on success, NULL on failure. |
| 1466 | */ |
Mike Rapoport | eb31d55 | 2018-10-30 15:08:04 -0700 | [diff] [blame] | 1467 | static void * __init memblock_alloc_internal( |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1468 | phys_addr_t size, phys_addr_t align, |
| 1469 | phys_addr_t min_addr, phys_addr_t max_addr, |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1470 | int nid, bool exact_nid) |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1471 | { |
| 1472 | phys_addr_t alloc; |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1473 | |
| 1474 | /* |
| 1475 | * Detect any accidental use of these APIs after slab is ready, as at |
| 1476 | * this moment memblock may be deinitialized already and its |
Mike Rapoport | c6ffc5c | 2018-10-30 15:09:30 -0700 | [diff] [blame] | 1477 | * internal data may be destroyed (after execution of memblock_free_all) |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1478 | */ |
| 1479 | if (WARN_ON_ONCE(slab_is_available())) |
| 1480 | return kzalloc_node(size, GFP_NOWAIT, nid); |
| 1481 | |
Mike Rapoport | f3057ad | 2019-10-18 20:20:01 -0700 | [diff] [blame] | 1482 | if (max_addr > memblock.current_limit) |
| 1483 | max_addr = memblock.current_limit; |
| 1484 | |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1485 | alloc = memblock_alloc_range_nid(size, align, min_addr, max_addr, nid, |
| 1486 | exact_nid); |
Mike Rapoport | 2f77080 | 2018-10-30 15:10:01 -0700 | [diff] [blame] | 1487 | |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1488 | /* retry allocation without lower limit */ |
| 1489 | if (!alloc && min_addr) |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1490 | alloc = memblock_alloc_range_nid(size, align, 0, max_addr, nid, |
| 1491 | exact_nid); |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1492 | |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1493 | if (!alloc) |
| 1494 | return NULL; |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1495 | |
Mike Rapoport | 92d12f9 | 2019-03-11 23:29:41 -0700 | [diff] [blame] | 1496 | return phys_to_virt(alloc); |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1497 | } |
| 1498 | |
| 1499 | /** |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1500 | * memblock_alloc_exact_nid_raw - allocate boot memory block on the exact node |
| 1501 | * without zeroing memory |
| 1502 | * @size: size of memory block to be allocated in bytes |
| 1503 | * @align: alignment of the region and block's size |
| 1504 | * @min_addr: the lower bound of the memory region from where the allocation |
| 1505 | * is preferred (phys address) |
| 1506 | * @max_addr: the upper bound of the memory region from where the allocation |
| 1507 | * is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to |
| 1508 | * allocate only from memory limited by memblock.current_limit value |
| 1509 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
| 1510 | * |
| 1511 | * Public function, provides additional debug information (including caller |
| 1512 | * info), if enabled. Does not zero allocated memory. |
| 1513 | * |
| 1514 | * Return: |
| 1515 | * Virtual address of allocated memory block on success, NULL on failure. |
| 1516 | */ |
| 1517 | void * __init memblock_alloc_exact_nid_raw( |
| 1518 | phys_addr_t size, phys_addr_t align, |
| 1519 | phys_addr_t min_addr, phys_addr_t max_addr, |
| 1520 | int nid) |
| 1521 | { |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1522 | memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=%pa max_addr=%pa %pS\n", |
| 1523 | __func__, (u64)size, (u64)align, nid, &min_addr, |
| 1524 | &max_addr, (void *)_RET_IP_); |
| 1525 | |
Mike Rapoport | 0867880 | 2021-09-02 14:58:05 -0700 | [diff] [blame] | 1526 | return memblock_alloc_internal(size, align, min_addr, max_addr, nid, |
| 1527 | true); |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1528 | } |
| 1529 | |
| 1530 | /** |
Mike Rapoport | eb31d55 | 2018-10-30 15:08:04 -0700 | [diff] [blame] | 1531 | * memblock_alloc_try_nid_raw - allocate boot memory block without zeroing |
Pavel Tatashin | ea1f5f3 | 2017-11-15 17:36:27 -0800 | [diff] [blame] | 1532 | * memory and without panicking |
| 1533 | * @size: size of memory block to be allocated in bytes |
| 1534 | * @align: alignment of the region and block's size |
| 1535 | * @min_addr: the lower bound of the memory region from where the allocation |
| 1536 | * is preferred (phys address) |
| 1537 | * @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] | 1538 | * is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to |
Pavel Tatashin | ea1f5f3 | 2017-11-15 17:36:27 -0800 | [diff] [blame] | 1539 | * allocate only from memory limited by memblock.current_limit value |
| 1540 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
| 1541 | * |
| 1542 | * Public function, provides additional debug information (including caller |
| 1543 | * info), if enabled. Does not zero allocated memory, does not panic if request |
| 1544 | * cannot be satisfied. |
| 1545 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1546 | * Return: |
Pavel Tatashin | ea1f5f3 | 2017-11-15 17:36:27 -0800 | [diff] [blame] | 1547 | * Virtual address of allocated memory block on success, NULL on failure. |
| 1548 | */ |
Mike Rapoport | eb31d55 | 2018-10-30 15:08:04 -0700 | [diff] [blame] | 1549 | void * __init memblock_alloc_try_nid_raw( |
Pavel Tatashin | ea1f5f3 | 2017-11-15 17:36:27 -0800 | [diff] [blame] | 1550 | phys_addr_t size, phys_addr_t align, |
| 1551 | phys_addr_t min_addr, phys_addr_t max_addr, |
| 1552 | int nid) |
| 1553 | { |
Sakari Ailus | d75f773 | 2019-03-25 21:32:28 +0200 | [diff] [blame] | 1554 | 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] | 1555 | __func__, (u64)size, (u64)align, nid, &min_addr, |
| 1556 | &max_addr, (void *)_RET_IP_); |
Pavel Tatashin | ea1f5f3 | 2017-11-15 17:36:27 -0800 | [diff] [blame] | 1557 | |
Mike Rapoport | 0867880 | 2021-09-02 14:58:05 -0700 | [diff] [blame] | 1558 | return memblock_alloc_internal(size, align, min_addr, max_addr, nid, |
| 1559 | false); |
Pavel Tatashin | ea1f5f3 | 2017-11-15 17:36:27 -0800 | [diff] [blame] | 1560 | } |
| 1561 | |
| 1562 | /** |
Mike Rapoport | c0dbe82 | 2019-03-11 23:30:37 -0700 | [diff] [blame] | 1563 | * memblock_alloc_try_nid - allocate boot memory block |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1564 | * @size: size of memory block to be allocated in bytes |
| 1565 | * @align: alignment of the region and block's size |
| 1566 | * @min_addr: the lower bound of the memory region from where the allocation |
| 1567 | * is preferred (phys address) |
| 1568 | * @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] | 1569 | * is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1570 | * allocate only from memory limited by memblock.current_limit value |
| 1571 | * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
| 1572 | * |
Mike Rapoport | c0dbe82 | 2019-03-11 23:30:37 -0700 | [diff] [blame] | 1573 | * Public function, provides additional debug information (including caller |
| 1574 | * info), if enabled. This function zeroes the allocated memory. |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1575 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1576 | * Return: |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1577 | * Virtual address of allocated memory block on success, NULL on failure. |
| 1578 | */ |
Mike Rapoport | eb31d55 | 2018-10-30 15:08:04 -0700 | [diff] [blame] | 1579 | void * __init memblock_alloc_try_nid( |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1580 | phys_addr_t size, phys_addr_t align, |
| 1581 | phys_addr_t min_addr, phys_addr_t max_addr, |
| 1582 | int nid) |
| 1583 | { |
| 1584 | void *ptr; |
| 1585 | |
Sakari Ailus | d75f773 | 2019-03-25 21:32:28 +0200 | [diff] [blame] | 1586 | 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] | 1587 | __func__, (u64)size, (u64)align, nid, &min_addr, |
| 1588 | &max_addr, (void *)_RET_IP_); |
Mike Rapoport | eb31d55 | 2018-10-30 15:08:04 -0700 | [diff] [blame] | 1589 | ptr = memblock_alloc_internal(size, align, |
Yunfeng Ye | 0ac398b | 2019-11-30 17:56:27 -0800 | [diff] [blame] | 1590 | min_addr, max_addr, nid, false); |
Mike Rapoport | c0dbe82 | 2019-03-11 23:30:37 -0700 | [diff] [blame] | 1591 | if (ptr) |
Pavel Tatashin | ea1f5f3 | 2017-11-15 17:36:27 -0800 | [diff] [blame] | 1592 | memset(ptr, 0, size); |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1593 | |
Mike Rapoport | c0dbe82 | 2019-03-11 23:30:37 -0700 | [diff] [blame] | 1594 | return ptr; |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1595 | } |
| 1596 | |
| 1597 | /** |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 1598 | * __memblock_free_late - free pages directly to buddy allocator |
Mike Rapoport | 48a833c | 2018-06-30 17:55:03 +0300 | [diff] [blame] | 1599 | * @base: phys starting address of the boot memory block |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1600 | * @size: size of the boot memory block in bytes |
| 1601 | * |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 1602 | * This is only useful when the memblock allocator has already been torn |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1603 | * down, but we are still initializing the system. Pages are released directly |
Mike Rapoport | a297413 | 2019-03-11 23:30:54 -0700 | [diff] [blame] | 1604 | * to the buddy allocator. |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1605 | */ |
| 1606 | void __init __memblock_free_late(phys_addr_t base, phys_addr_t size) |
| 1607 | { |
Mike Rapoport | a36aab8 | 2018-08-17 15:47:17 -0700 | [diff] [blame] | 1608 | phys_addr_t cursor, end; |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1609 | |
Mike Rapoport | a36aab8 | 2018-08-17 15:47:17 -0700 | [diff] [blame] | 1610 | end = base + size - 1; |
Sakari Ailus | d75f773 | 2019-03-25 21:32:28 +0200 | [diff] [blame] | 1611 | memblock_dbg("%s: [%pa-%pa] %pS\n", |
Mike Rapoport | a36aab8 | 2018-08-17 15:47:17 -0700 | [diff] [blame] | 1612 | __func__, &base, &end, (void *)_RET_IP_); |
Catalin Marinas | 9099dae | 2016-10-11 13:55:11 -0700 | [diff] [blame] | 1613 | kmemleak_free_part_phys(base, size); |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1614 | cursor = PFN_UP(base); |
| 1615 | end = PFN_DOWN(base + size); |
| 1616 | |
| 1617 | for (; cursor < end; cursor++) { |
Mike Rapoport | 7c2ee34 | 2018-10-30 15:09:36 -0700 | [diff] [blame] | 1618 | memblock_free_pages(pfn_to_page(cursor), cursor, 0); |
Arun KS | ca79b0c | 2018-12-28 00:34:29 -0800 | [diff] [blame] | 1619 | totalram_pages_inc(); |
Santosh Shilimkar | 26f09e9 | 2014-01-21 15:50:19 -0800 | [diff] [blame] | 1620 | } |
| 1621 | } |
Benjamin Herrenschmidt | 9d1e249 | 2010-07-06 15:39:17 -0700 | [diff] [blame] | 1622 | |
| 1623 | /* |
| 1624 | * Remaining API functions |
| 1625 | */ |
| 1626 | |
David Gibson | 1f1ffb8a | 2016-02-05 15:36:19 -0800 | [diff] [blame] | 1627 | phys_addr_t __init_memblock memblock_phys_mem_size(void) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1628 | { |
Tejun Heo | 1440c4e | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 1629 | return memblock.memory.total_size; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1630 | } |
| 1631 | |
Srikar Dronamraju | 8907de5 | 2016-10-07 16:59:18 -0700 | [diff] [blame] | 1632 | phys_addr_t __init_memblock memblock_reserved_size(void) |
| 1633 | { |
| 1634 | return memblock.reserved.total_size; |
| 1635 | } |
| 1636 | |
Sam Ravnborg | 0a93ebe | 2011-10-31 17:08:16 -0700 | [diff] [blame] | 1637 | /* lowest address */ |
| 1638 | phys_addr_t __init_memblock memblock_start_of_DRAM(void) |
| 1639 | { |
| 1640 | return memblock.memory.regions[0].base; |
| 1641 | } |
| 1642 | |
Yinghai Lu | 10d0643 | 2010-07-28 15:43:02 +1000 | [diff] [blame] | 1643 | phys_addr_t __init_memblock memblock_end_of_DRAM(void) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1644 | { |
| 1645 | int idx = memblock.memory.cnt - 1; |
| 1646 | |
Benjamin Herrenschmidt | e3239ff | 2010-08-04 14:06:41 +1000 | [diff] [blame] | 1647 | return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1648 | } |
| 1649 | |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1650 | 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] | 1651 | { |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1652 | phys_addr_t max_addr = PHYS_ADDR_MAX; |
Emil Medve | 136199f | 2014-04-07 15:37:52 -0700 | [diff] [blame] | 1653 | struct memblock_region *r; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1654 | |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1655 | /* |
| 1656 | * translate the memory @limit size into the max address within one of |
| 1657 | * the memory memblock regions, if the @limit exceeds the total size |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1658 | * of those regions, max_addr will keep original value PHYS_ADDR_MAX |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1659 | */ |
Mike Rapoport | cc6de16 | 2020-10-13 16:58:30 -0700 | [diff] [blame] | 1660 | for_each_mem_region(r) { |
Tejun Heo | c0ce8fe | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1661 | if (limit <= r->size) { |
| 1662 | max_addr = r->base + limit; |
| 1663 | break; |
| 1664 | } |
| 1665 | limit -= r->size; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1666 | } |
| 1667 | |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1668 | return max_addr; |
| 1669 | } |
| 1670 | |
| 1671 | void __init memblock_enforce_memory_limit(phys_addr_t limit) |
| 1672 | { |
Colin Ian King | 49aef71 | 2020-04-01 21:11:01 -0700 | [diff] [blame] | 1673 | phys_addr_t max_addr; |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1674 | |
| 1675 | if (!limit) |
| 1676 | return; |
| 1677 | |
| 1678 | max_addr = __find_max_addr(limit); |
| 1679 | |
| 1680 | /* @limit exceeds the total size of the memory, do nothing */ |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1681 | if (max_addr == PHYS_ADDR_MAX) |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1682 | return; |
| 1683 | |
Tejun Heo | c0ce8fe | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1684 | /* truncate both memory and reserved regions */ |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1685 | memblock_remove_range(&memblock.memory, max_addr, |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1686 | PHYS_ADDR_MAX); |
Philipp Hachtmann | f1af9d3 | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 1687 | memblock_remove_range(&memblock.reserved, max_addr, |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1688 | PHYS_ADDR_MAX); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1689 | } |
| 1690 | |
AKASHI Takahiro | c9ca9b4 | 2017-04-03 11:23:55 +0900 | [diff] [blame] | 1691 | void __init memblock_cap_memory_range(phys_addr_t base, phys_addr_t size) |
| 1692 | { |
| 1693 | int start_rgn, end_rgn; |
| 1694 | int i, ret; |
| 1695 | |
| 1696 | if (!size) |
| 1697 | return; |
| 1698 | |
Peng Fan | 5173ed7 | 2021-10-18 15:15:45 -0700 | [diff] [blame] | 1699 | if (!memblock_memory->total_size) { |
Geert Uytterhoeven | e888fa7 | 2021-08-11 10:55:18 +0200 | [diff] [blame] | 1700 | pr_warn("%s: No memory registered yet\n", __func__); |
| 1701 | return; |
| 1702 | } |
| 1703 | |
AKASHI Takahiro | c9ca9b4 | 2017-04-03 11:23:55 +0900 | [diff] [blame] | 1704 | ret = memblock_isolate_range(&memblock.memory, base, size, |
| 1705 | &start_rgn, &end_rgn); |
| 1706 | if (ret) |
| 1707 | return; |
| 1708 | |
| 1709 | /* remove all the MAP regions */ |
| 1710 | for (i = memblock.memory.cnt - 1; i >= end_rgn; i--) |
| 1711 | if (!memblock_is_nomap(&memblock.memory.regions[i])) |
| 1712 | memblock_remove_region(&memblock.memory, i); |
| 1713 | |
| 1714 | for (i = start_rgn - 1; i >= 0; i--) |
| 1715 | if (!memblock_is_nomap(&memblock.memory.regions[i])) |
| 1716 | memblock_remove_region(&memblock.memory, i); |
| 1717 | |
| 1718 | /* truncate the reserved regions */ |
| 1719 | memblock_remove_range(&memblock.reserved, 0, base); |
| 1720 | memblock_remove_range(&memblock.reserved, |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1721 | base + size, PHYS_ADDR_MAX); |
AKASHI Takahiro | c9ca9b4 | 2017-04-03 11:23:55 +0900 | [diff] [blame] | 1722 | } |
| 1723 | |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1724 | void __init memblock_mem_limit_remove_map(phys_addr_t limit) |
| 1725 | { |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1726 | phys_addr_t max_addr; |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1727 | |
| 1728 | if (!limit) |
| 1729 | return; |
| 1730 | |
| 1731 | max_addr = __find_max_addr(limit); |
| 1732 | |
| 1733 | /* @limit exceeds the total size of the memory, do nothing */ |
Stefan Agner | 1c4bc43 | 2018-06-07 17:06:15 -0700 | [diff] [blame] | 1734 | if (max_addr == PHYS_ADDR_MAX) |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1735 | return; |
| 1736 | |
AKASHI Takahiro | c9ca9b4 | 2017-04-03 11:23:55 +0900 | [diff] [blame] | 1737 | memblock_cap_memory_range(0, max_addr); |
Dennis Chen | a571d4e | 2016-07-28 15:48:26 -0700 | [diff] [blame] | 1738 | } |
| 1739 | |
Yinghai Lu | cd79481 | 2010-10-11 12:34:09 -0700 | [diff] [blame] | 1740 | 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] | 1741 | { |
| 1742 | unsigned int left = 0, right = type->cnt; |
| 1743 | |
| 1744 | do { |
| 1745 | unsigned int mid = (right + left) / 2; |
| 1746 | |
| 1747 | if (addr < type->regions[mid].base) |
| 1748 | right = mid; |
| 1749 | else if (addr >= (type->regions[mid].base + |
| 1750 | type->regions[mid].size)) |
| 1751 | left = mid + 1; |
| 1752 | else |
| 1753 | return mid; |
| 1754 | } while (left < right); |
| 1755 | return -1; |
| 1756 | } |
| 1757 | |
Yueyi Li | f5a222d | 2018-12-14 14:17:06 -0800 | [diff] [blame] | 1758 | bool __init_memblock memblock_is_reserved(phys_addr_t addr) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1759 | { |
Benjamin Herrenschmidt | 72d4b0b | 2010-08-04 14:38:47 +1000 | [diff] [blame] | 1760 | return memblock_search(&memblock.reserved, addr) != -1; |
| 1761 | } |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1762 | |
Yaowei Bai | b4ad0c7 | 2016-01-14 15:18:54 -0800 | [diff] [blame] | 1763 | bool __init_memblock memblock_is_memory(phys_addr_t addr) |
Benjamin Herrenschmidt | 72d4b0b | 2010-08-04 14:38:47 +1000 | [diff] [blame] | 1764 | { |
| 1765 | return memblock_search(&memblock.memory, addr) != -1; |
| 1766 | } |
| 1767 | |
Yaowei Bai | 937f0c2 | 2018-02-06 15:41:18 -0800 | [diff] [blame] | 1768 | bool __init_memblock memblock_is_map_memory(phys_addr_t addr) |
Ard Biesheuvel | bf3d3cc | 2015-11-30 13:28:15 +0100 | [diff] [blame] | 1769 | { |
| 1770 | int i = memblock_search(&memblock.memory, addr); |
| 1771 | |
| 1772 | if (i == -1) |
| 1773 | return false; |
| 1774 | return !memblock_is_nomap(&memblock.memory.regions[i]); |
| 1775 | } |
| 1776 | |
Yinghai Lu | e76b63f | 2013-09-11 14:22:17 -0700 | [diff] [blame] | 1777 | int __init_memblock memblock_search_pfn_nid(unsigned long pfn, |
| 1778 | unsigned long *start_pfn, unsigned long *end_pfn) |
| 1779 | { |
| 1780 | struct memblock_type *type = &memblock.memory; |
Fabian Frederick | 1676323 | 2014-04-07 15:37:53 -0700 | [diff] [blame] | 1781 | int mid = memblock_search(type, PFN_PHYS(pfn)); |
Yinghai Lu | e76b63f | 2013-09-11 14:22:17 -0700 | [diff] [blame] | 1782 | |
| 1783 | if (mid == -1) |
| 1784 | return -1; |
| 1785 | |
Fabian Frederick | f7e2f7e | 2014-06-04 16:07:51 -0700 | [diff] [blame] | 1786 | *start_pfn = PFN_DOWN(type->regions[mid].base); |
| 1787 | *end_pfn = PFN_DOWN(type->regions[mid].base + type->regions[mid].size); |
Yinghai Lu | e76b63f | 2013-09-11 14:22:17 -0700 | [diff] [blame] | 1788 | |
Mike Rapoport | d622abf | 2020-06-03 15:56:53 -0700 | [diff] [blame] | 1789 | return memblock_get_region_node(&type->regions[mid]); |
Yinghai Lu | e76b63f | 2013-09-11 14:22:17 -0700 | [diff] [blame] | 1790 | } |
Yinghai Lu | e76b63f | 2013-09-11 14:22:17 -0700 | [diff] [blame] | 1791 | |
Stephen Boyd | eab3094 | 2012-05-24 00:45:21 -0700 | [diff] [blame] | 1792 | /** |
| 1793 | * memblock_is_region_memory - check if a region is a subset of memory |
| 1794 | * @base: base of region to check |
| 1795 | * @size: size of region to check |
| 1796 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1797 | * 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] | 1798 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1799 | * Return: |
Stephen Boyd | eab3094 | 2012-05-24 00:45:21 -0700 | [diff] [blame] | 1800 | * 0 if false, non-zero if true |
| 1801 | */ |
Yaowei Bai | 937f0c2 | 2018-02-06 15:41:18 -0800 | [diff] [blame] | 1802 | 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] | 1803 | { |
Tomi Valkeinen | abb6527 | 2011-01-20 14:44:20 -0800 | [diff] [blame] | 1804 | int idx = memblock_search(&memblock.memory, base); |
Tejun Heo | eb18f1b | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1805 | phys_addr_t end = base + memblock_cap_size(base, &size); |
Benjamin Herrenschmidt | 72d4b0b | 2010-08-04 14:38:47 +1000 | [diff] [blame] | 1806 | |
| 1807 | if (idx == -1) |
Yaowei Bai | 937f0c2 | 2018-02-06 15:41:18 -0800 | [diff] [blame] | 1808 | return false; |
Wei Yang | ef415ef | 2017-02-22 15:45:04 -0800 | [diff] [blame] | 1809 | return (memblock.memory.regions[idx].base + |
Tejun Heo | eb18f1b | 2011-12-08 10:22:07 -0800 | [diff] [blame] | 1810 | memblock.memory.regions[idx].size) >= end; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1811 | } |
| 1812 | |
Stephen Boyd | eab3094 | 2012-05-24 00:45:21 -0700 | [diff] [blame] | 1813 | /** |
| 1814 | * memblock_is_region_reserved - check if a region intersects reserved memory |
| 1815 | * @base: base of region to check |
| 1816 | * @size: size of region to check |
| 1817 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1818 | * Check if the region [@base, @base + @size) intersects a reserved |
| 1819 | * memory block. |
Stephen Boyd | eab3094 | 2012-05-24 00:45:21 -0700 | [diff] [blame] | 1820 | * |
Mike Rapoport | 47cec44 | 2018-06-30 17:55:02 +0300 | [diff] [blame] | 1821 | * Return: |
Tang Chen | c5c5c9d | 2015-09-08 15:02:00 -0700 | [diff] [blame] | 1822 | * True if they intersect, false if not. |
Stephen Boyd | eab3094 | 2012-05-24 00:45:21 -0700 | [diff] [blame] | 1823 | */ |
Tang Chen | c5c5c9d | 2015-09-08 15:02:00 -0700 | [diff] [blame] | 1824 | 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] | 1825 | { |
Tang Chen | c5c5c9d | 2015-09-08 15:02:00 -0700 | [diff] [blame] | 1826 | return memblock_overlaps_region(&memblock.reserved, base, size); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1827 | } |
| 1828 | |
Yinghai Lu | 6ede1fd | 2012-10-22 16:35:18 -0700 | [diff] [blame] | 1829 | void __init_memblock memblock_trim_memory(phys_addr_t align) |
| 1830 | { |
Yinghai Lu | 6ede1fd | 2012-10-22 16:35:18 -0700 | [diff] [blame] | 1831 | phys_addr_t start, end, orig_start, orig_end; |
Emil Medve | 136199f | 2014-04-07 15:37:52 -0700 | [diff] [blame] | 1832 | struct memblock_region *r; |
Yinghai Lu | 6ede1fd | 2012-10-22 16:35:18 -0700 | [diff] [blame] | 1833 | |
Mike Rapoport | cc6de16 | 2020-10-13 16:58:30 -0700 | [diff] [blame] | 1834 | for_each_mem_region(r) { |
Emil Medve | 136199f | 2014-04-07 15:37:52 -0700 | [diff] [blame] | 1835 | orig_start = r->base; |
| 1836 | orig_end = r->base + r->size; |
Yinghai Lu | 6ede1fd | 2012-10-22 16:35:18 -0700 | [diff] [blame] | 1837 | start = round_up(orig_start, align); |
| 1838 | end = round_down(orig_end, align); |
| 1839 | |
| 1840 | if (start == orig_start && end == orig_end) |
| 1841 | continue; |
| 1842 | |
| 1843 | if (start < end) { |
Emil Medve | 136199f | 2014-04-07 15:37:52 -0700 | [diff] [blame] | 1844 | r->base = start; |
| 1845 | r->size = end - start; |
Yinghai Lu | 6ede1fd | 2012-10-22 16:35:18 -0700 | [diff] [blame] | 1846 | } else { |
Emil Medve | 136199f | 2014-04-07 15:37:52 -0700 | [diff] [blame] | 1847 | memblock_remove_region(&memblock.memory, |
| 1848 | r - memblock.memory.regions); |
| 1849 | r--; |
Yinghai Lu | 6ede1fd | 2012-10-22 16:35:18 -0700 | [diff] [blame] | 1850 | } |
| 1851 | } |
| 1852 | } |
Benjamin Herrenschmidt | e63075a | 2010-07-06 15:39:01 -0700 | [diff] [blame] | 1853 | |
Yinghai Lu | 3661ca6 | 2010-09-15 13:05:29 -0700 | [diff] [blame] | 1854 | void __init_memblock memblock_set_current_limit(phys_addr_t limit) |
Benjamin Herrenschmidt | e63075a | 2010-07-06 15:39:01 -0700 | [diff] [blame] | 1855 | { |
| 1856 | memblock.current_limit = limit; |
| 1857 | } |
| 1858 | |
Laura Abbott | fec5101 | 2014-02-27 01:23:43 +0100 | [diff] [blame] | 1859 | phys_addr_t __init_memblock memblock_get_current_limit(void) |
| 1860 | { |
| 1861 | return memblock.current_limit; |
| 1862 | } |
| 1863 | |
Heiko Carstens | 0262d9c | 2017-02-24 14:55:59 -0800 | [diff] [blame] | 1864 | static void __init_memblock memblock_dump(struct memblock_type *type) |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1865 | { |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 1866 | phys_addr_t base, end, size; |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 1867 | enum memblock_flags flags; |
Alexander Kuleshov | 8c9c170 | 2016-01-14 15:20:42 -0800 | [diff] [blame] | 1868 | int idx; |
| 1869 | struct memblock_region *rgn; |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1870 | |
Heiko Carstens | 0262d9c | 2017-02-24 14:55:59 -0800 | [diff] [blame] | 1871 | pr_info(" %s.cnt = 0x%lx\n", type->name, type->cnt); |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1872 | |
Gioh Kim | 66e8b43 | 2017-11-15 17:33:42 -0800 | [diff] [blame] | 1873 | for_each_memblock_type(idx, type, rgn) { |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1874 | char nid_buf[32] = ""; |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1875 | |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1876 | base = rgn->base; |
| 1877 | size = rgn->size; |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 1878 | end = base + size - 1; |
Tang Chen | 66a2075 | 2014-01-21 15:49:20 -0800 | [diff] [blame] | 1879 | flags = rgn->flags; |
Mike Rapoport | a9ee6cf | 2021-06-28 19:43:01 -0700 | [diff] [blame] | 1880 | #ifdef CONFIG_NUMA |
Tejun Heo | 7c0caeb | 2011-07-14 11:43:42 +0200 | [diff] [blame] | 1881 | if (memblock_get_region_node(rgn) != MAX_NUMNODES) |
| 1882 | snprintf(nid_buf, sizeof(nid_buf), " on node %d", |
| 1883 | memblock_get_region_node(rgn)); |
| 1884 | #endif |
Mike Rapoport | e1720fe | 2018-06-30 17:55:01 +0300 | [diff] [blame] | 1885 | 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] | 1886 | type->name, idx, &base, &end, &size, nid_buf, flags); |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1887 | } |
| 1888 | } |
| 1889 | |
Mike Rapoport | 87c5587 | 2020-10-13 16:57:54 -0700 | [diff] [blame] | 1890 | static void __init_memblock __memblock_dump_all(void) |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1891 | { |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1892 | pr_info("MEMBLOCK configuration:\n"); |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 1893 | pr_info(" memory size = %pa reserved size = %pa\n", |
| 1894 | &memblock.memory.total_size, |
| 1895 | &memblock.reserved.total_size); |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1896 | |
Heiko Carstens | 0262d9c | 2017-02-24 14:55:59 -0800 | [diff] [blame] | 1897 | memblock_dump(&memblock.memory); |
| 1898 | memblock_dump(&memblock.reserved); |
Heiko Carstens | 409efd4 | 2017-02-24 14:55:56 -0800 | [diff] [blame] | 1899 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
David Hildenbrand | 7764990 | 2020-07-01 16:18:29 +0200 | [diff] [blame] | 1900 | memblock_dump(&physmem); |
Heiko Carstens | 409efd4 | 2017-02-24 14:55:56 -0800 | [diff] [blame] | 1901 | #endif |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1902 | } |
| 1903 | |
Mike Rapoport | 87c5587 | 2020-10-13 16:57:54 -0700 | [diff] [blame] | 1904 | void __init_memblock memblock_dump_all(void) |
| 1905 | { |
| 1906 | if (memblock_debug) |
| 1907 | __memblock_dump_all(); |
| 1908 | } |
| 1909 | |
Tejun Heo | 1aadc05 | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 1910 | void __init memblock_allow_resize(void) |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1911 | { |
Benjamin Herrenschmidt | 142b45a | 2010-07-06 15:39:13 -0700 | [diff] [blame] | 1912 | memblock_can_resize = 1; |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1913 | } |
| 1914 | |
Benjamin Herrenschmidt | 6ed311b | 2010-07-12 14:36:48 +1000 | [diff] [blame] | 1915 | static int __init early_memblock(char *p) |
| 1916 | { |
| 1917 | if (p && strstr(p, "debug")) |
| 1918 | memblock_debug = 1; |
| 1919 | return 0; |
| 1920 | } |
| 1921 | early_param("memblock", early_memblock); |
| 1922 | |
Mike Rapoport | 4f5b0c1 | 2020-12-14 19:09:59 -0800 | [diff] [blame] | 1923 | static void __init free_memmap(unsigned long start_pfn, unsigned long end_pfn) |
| 1924 | { |
| 1925 | struct page *start_pg, *end_pg; |
| 1926 | phys_addr_t pg, pgend; |
| 1927 | |
| 1928 | /* |
| 1929 | * Convert start_pfn/end_pfn to a struct page pointer. |
| 1930 | */ |
| 1931 | start_pg = pfn_to_page(start_pfn - 1) + 1; |
| 1932 | end_pg = pfn_to_page(end_pfn - 1) + 1; |
| 1933 | |
| 1934 | /* |
| 1935 | * Convert to physical addresses, and round start upwards and end |
| 1936 | * downwards. |
| 1937 | */ |
| 1938 | pg = PAGE_ALIGN(__pa(start_pg)); |
| 1939 | pgend = __pa(end_pg) & PAGE_MASK; |
| 1940 | |
| 1941 | /* |
| 1942 | * If there are free pages between these, free the section of the |
| 1943 | * memmap array. |
| 1944 | */ |
| 1945 | if (pg < pgend) |
| 1946 | memblock_free(pg, pgend - pg); |
| 1947 | } |
| 1948 | |
| 1949 | /* |
| 1950 | * The mem_map array can get very big. Free the unused area of the memory map. |
| 1951 | */ |
| 1952 | static void __init free_unused_memmap(void) |
| 1953 | { |
| 1954 | unsigned long start, end, prev_end = 0; |
| 1955 | int i; |
| 1956 | |
| 1957 | if (!IS_ENABLED(CONFIG_HAVE_ARCH_PFN_VALID) || |
| 1958 | IS_ENABLED(CONFIG_SPARSEMEM_VMEMMAP)) |
| 1959 | return; |
| 1960 | |
| 1961 | /* |
| 1962 | * This relies on each bank being in address order. |
| 1963 | * The banks are sorted previously in bootmem_init(). |
| 1964 | */ |
| 1965 | for_each_mem_pfn_range(i, MAX_NUMNODES, &start, &end, NULL) { |
| 1966 | #ifdef CONFIG_SPARSEMEM |
| 1967 | /* |
| 1968 | * Take care not to free memmap entries that don't exist |
| 1969 | * due to SPARSEMEM sections which aren't present. |
| 1970 | */ |
| 1971 | start = min(start, ALIGN(prev_end, PAGES_PER_SECTION)); |
Mike Rapoport | 4f5b0c1 | 2020-12-14 19:09:59 -0800 | [diff] [blame] | 1972 | #endif |
Mike Rapoport | 4f5b0c1 | 2020-12-14 19:09:59 -0800 | [diff] [blame] | 1973 | /* |
Mike Rapoport | e2a8680 | 2021-05-17 21:15:15 +0300 | [diff] [blame] | 1974 | * Align down here since many operations in VM subsystem |
| 1975 | * presume that there are no holes in the memory map inside |
| 1976 | * a pageblock |
Mike Rapoport | 4f5b0c1 | 2020-12-14 19:09:59 -0800 | [diff] [blame] | 1977 | */ |
Mike Rapoport | e2a8680 | 2021-05-17 21:15:15 +0300 | [diff] [blame] | 1978 | start = round_down(start, pageblock_nr_pages); |
Mike Rapoport | 4f5b0c1 | 2020-12-14 19:09:59 -0800 | [diff] [blame] | 1979 | |
| 1980 | /* |
| 1981 | * If we had a previous bank, and there is a space |
| 1982 | * between the current bank and the previous, free it. |
| 1983 | */ |
| 1984 | if (prev_end && prev_end < start) |
| 1985 | free_memmap(prev_end, start); |
| 1986 | |
| 1987 | /* |
Mike Rapoport | e2a8680 | 2021-05-17 21:15:15 +0300 | [diff] [blame] | 1988 | * Align up here since many operations in VM subsystem |
| 1989 | * presume that there are no holes in the memory map inside |
| 1990 | * a pageblock |
Mike Rapoport | 4f5b0c1 | 2020-12-14 19:09:59 -0800 | [diff] [blame] | 1991 | */ |
Mike Rapoport | e2a8680 | 2021-05-17 21:15:15 +0300 | [diff] [blame] | 1992 | prev_end = ALIGN(end, pageblock_nr_pages); |
Mike Rapoport | 4f5b0c1 | 2020-12-14 19:09:59 -0800 | [diff] [blame] | 1993 | } |
| 1994 | |
| 1995 | #ifdef CONFIG_SPARSEMEM |
Mike Rapoport | f921f53 | 2021-05-17 21:31:59 +0300 | [diff] [blame] | 1996 | if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION)) { |
| 1997 | prev_end = ALIGN(end, pageblock_nr_pages); |
Mike Rapoport | 4f5b0c1 | 2020-12-14 19:09:59 -0800 | [diff] [blame] | 1998 | free_memmap(prev_end, ALIGN(prev_end, PAGES_PER_SECTION)); |
Mike Rapoport | f921f53 | 2021-05-17 21:31:59 +0300 | [diff] [blame] | 1999 | } |
Mike Rapoport | 4f5b0c1 | 2020-12-14 19:09:59 -0800 | [diff] [blame] | 2000 | #endif |
| 2001 | } |
| 2002 | |
Mike Rapoport | bda49a8 | 2018-10-30 15:09:40 -0700 | [diff] [blame] | 2003 | static void __init __free_pages_memory(unsigned long start, unsigned long end) |
| 2004 | { |
| 2005 | int order; |
| 2006 | |
| 2007 | while (start < end) { |
| 2008 | order = min(MAX_ORDER - 1UL, __ffs(start)); |
| 2009 | |
| 2010 | while (start + (1UL << order) > end) |
| 2011 | order--; |
| 2012 | |
| 2013 | memblock_free_pages(pfn_to_page(start), start, order); |
| 2014 | |
| 2015 | start += (1UL << order); |
| 2016 | } |
| 2017 | } |
| 2018 | |
| 2019 | static unsigned long __init __free_memory_core(phys_addr_t start, |
| 2020 | phys_addr_t end) |
| 2021 | { |
| 2022 | unsigned long start_pfn = PFN_UP(start); |
| 2023 | unsigned long end_pfn = min_t(unsigned long, |
| 2024 | PFN_DOWN(end), max_low_pfn); |
| 2025 | |
| 2026 | if (start_pfn >= end_pfn) |
| 2027 | return 0; |
| 2028 | |
| 2029 | __free_pages_memory(start_pfn, end_pfn); |
| 2030 | |
| 2031 | return end_pfn - start_pfn; |
| 2032 | } |
| 2033 | |
Mike Rapoport | 9092d4f | 2021-06-30 18:51:16 -0700 | [diff] [blame] | 2034 | static void __init memmap_init_reserved_pages(void) |
| 2035 | { |
| 2036 | struct memblock_region *region; |
| 2037 | phys_addr_t start, end; |
| 2038 | u64 i; |
| 2039 | |
| 2040 | /* initialize struct pages for the reserved regions */ |
| 2041 | for_each_reserved_mem_range(i, &start, &end) |
| 2042 | reserve_bootmem_region(start, end); |
| 2043 | |
| 2044 | /* and also treat struct pages for the NOMAP regions as PageReserved */ |
| 2045 | for_each_mem_region(region) { |
| 2046 | if (memblock_is_nomap(region)) { |
| 2047 | start = region->base; |
| 2048 | end = start + region->size; |
| 2049 | reserve_bootmem_region(start, end); |
| 2050 | } |
| 2051 | } |
| 2052 | } |
| 2053 | |
Mike Rapoport | bda49a8 | 2018-10-30 15:09:40 -0700 | [diff] [blame] | 2054 | static unsigned long __init free_low_memory_core_early(void) |
| 2055 | { |
| 2056 | unsigned long count = 0; |
| 2057 | phys_addr_t start, end; |
| 2058 | u64 i; |
| 2059 | |
| 2060 | memblock_clear_hotplug(0, -1); |
| 2061 | |
Mike Rapoport | 9092d4f | 2021-06-30 18:51:16 -0700 | [diff] [blame] | 2062 | memmap_init_reserved_pages(); |
Mike Rapoport | bda49a8 | 2018-10-30 15:09:40 -0700 | [diff] [blame] | 2063 | |
| 2064 | /* |
| 2065 | * We need to use NUMA_NO_NODE instead of NODE_DATA(0)->node_id |
| 2066 | * because in some case like Node0 doesn't have RAM installed |
| 2067 | * low ram will be on Node1 |
| 2068 | */ |
| 2069 | for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, |
| 2070 | NULL) |
| 2071 | count += __free_memory_core(start, end); |
| 2072 | |
| 2073 | return count; |
| 2074 | } |
| 2075 | |
| 2076 | static int reset_managed_pages_done __initdata; |
| 2077 | |
| 2078 | void reset_node_managed_pages(pg_data_t *pgdat) |
| 2079 | { |
| 2080 | struct zone *z; |
| 2081 | |
| 2082 | 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] | 2083 | atomic_long_set(&z->managed_pages, 0); |
Mike Rapoport | bda49a8 | 2018-10-30 15:09:40 -0700 | [diff] [blame] | 2084 | } |
| 2085 | |
| 2086 | void __init reset_all_zones_managed_pages(void) |
| 2087 | { |
| 2088 | struct pglist_data *pgdat; |
| 2089 | |
| 2090 | if (reset_managed_pages_done) |
| 2091 | return; |
| 2092 | |
| 2093 | for_each_online_pgdat(pgdat) |
| 2094 | reset_node_managed_pages(pgdat); |
| 2095 | |
| 2096 | reset_managed_pages_done = 1; |
| 2097 | } |
| 2098 | |
| 2099 | /** |
| 2100 | * memblock_free_all - release free pages to the buddy allocator |
Mike Rapoport | bda49a8 | 2018-10-30 15:09:40 -0700 | [diff] [blame] | 2101 | */ |
Daeseok Youn | 097d43d | 2021-01-14 16:08:17 +0900 | [diff] [blame] | 2102 | void __init memblock_free_all(void) |
Mike Rapoport | bda49a8 | 2018-10-30 15:09:40 -0700 | [diff] [blame] | 2103 | { |
| 2104 | unsigned long pages; |
| 2105 | |
Mike Rapoport | 4f5b0c1 | 2020-12-14 19:09:59 -0800 | [diff] [blame] | 2106 | free_unused_memmap(); |
Mike Rapoport | bda49a8 | 2018-10-30 15:09:40 -0700 | [diff] [blame] | 2107 | reset_all_zones_managed_pages(); |
| 2108 | |
| 2109 | pages = free_low_memory_core_early(); |
Arun KS | ca79b0c | 2018-12-28 00:34:29 -0800 | [diff] [blame] | 2110 | totalram_pages_add(pages); |
Mike Rapoport | bda49a8 | 2018-10-30 15:09:40 -0700 | [diff] [blame] | 2111 | } |
| 2112 | |
Mike Rapoport | 350e88b | 2019-05-13 17:22:59 -0700 | [diff] [blame] | 2113 | #if defined(CONFIG_DEBUG_FS) && defined(CONFIG_ARCH_KEEP_MEMBLOCK) |
Benjamin Herrenschmidt | 6d03b88 | 2010-07-06 15:39:19 -0700 | [diff] [blame] | 2114 | |
| 2115 | static int memblock_debug_show(struct seq_file *m, void *private) |
| 2116 | { |
| 2117 | struct memblock_type *type = m->private; |
| 2118 | struct memblock_region *reg; |
| 2119 | int i; |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 2120 | phys_addr_t end; |
Benjamin Herrenschmidt | 6d03b88 | 2010-07-06 15:39:19 -0700 | [diff] [blame] | 2121 | |
| 2122 | for (i = 0; i < type->cnt; i++) { |
| 2123 | reg = &type->regions[i]; |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 2124 | end = reg->base + reg->size - 1; |
Benjamin Herrenschmidt | 6d03b88 | 2010-07-06 15:39:19 -0700 | [diff] [blame] | 2125 | |
Miles Chen | 5d63f81 | 2017-02-22 15:46:42 -0800 | [diff] [blame] | 2126 | seq_printf(m, "%4d: ", i); |
| 2127 | seq_printf(m, "%pa..%pa\n", ®->base, &end); |
Benjamin Herrenschmidt | 6d03b88 | 2010-07-06 15:39:19 -0700 | [diff] [blame] | 2128 | } |
| 2129 | return 0; |
| 2130 | } |
Andy Shevchenko | 5ad3509 | 2018-04-05 16:23:16 -0700 | [diff] [blame] | 2131 | DEFINE_SHOW_ATTRIBUTE(memblock_debug); |
Benjamin Herrenschmidt | 6d03b88 | 2010-07-06 15:39:19 -0700 | [diff] [blame] | 2132 | |
| 2133 | static int __init memblock_init_debugfs(void) |
| 2134 | { |
| 2135 | struct dentry *root = debugfs_create_dir("memblock", NULL); |
Greg Kroah-Hartman | d9f7979 | 2019-03-05 15:46:09 -0800 | [diff] [blame] | 2136 | |
Joe Perches | 0825a6f | 2018-06-14 15:27:58 -0700 | [diff] [blame] | 2137 | debugfs_create_file("memory", 0444, root, |
| 2138 | &memblock.memory, &memblock_debug_fops); |
| 2139 | debugfs_create_file("reserved", 0444, root, |
| 2140 | &memblock.reserved, &memblock_debug_fops); |
Philipp Hachtmann | 70210ed | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 2141 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
David Hildenbrand | 7764990 | 2020-07-01 16:18:29 +0200 | [diff] [blame] | 2142 | debugfs_create_file("physmem", 0444, root, &physmem, |
| 2143 | &memblock_debug_fops); |
Philipp Hachtmann | 70210ed | 2014-01-29 18:16:01 +0100 | [diff] [blame] | 2144 | #endif |
Benjamin Herrenschmidt | 6d03b88 | 2010-07-06 15:39:19 -0700 | [diff] [blame] | 2145 | |
| 2146 | return 0; |
| 2147 | } |
| 2148 | __initcall(memblock_init_debugfs); |
| 2149 | |
| 2150 | #endif /* CONFIG_DEBUG_FS */ |