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mm/memblock.c
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// SPDX-License-Identifier: GPL-2.0-or-later |
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/* * Procedures for maintaining information about logical memory blocks. * * Peter Bergner, IBM Corp. June 2001. * Copyright (C) 2001 Peter Bergner. |
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*/ #include <linux/kernel.h> |
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#include <linux/slab.h> |
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#include <linux/init.h> #include <linux/bitops.h> |
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#include <linux/poison.h> |
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#include <linux/pfn.h> |
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#include <linux/debugfs.h> |
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#include <linux/kmemleak.h> |
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#include <linux/seq_file.h> |
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#include <linux/memblock.h> |
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#include <asm/sections.h> |
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#include <linux/io.h> #include "internal.h" |
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#define INIT_MEMBLOCK_REGIONS 128 #define INIT_PHYSMEM_REGIONS 4 #ifndef INIT_MEMBLOCK_RESERVED_REGIONS # define INIT_MEMBLOCK_RESERVED_REGIONS INIT_MEMBLOCK_REGIONS #endif |
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/** * DOC: memblock overview * * Memblock is a method of managing memory regions during the early * boot period when the usual kernel memory allocators are not up and * running. * * Memblock views the system memory as collections of contiguous * regions. There are several types of these collections: * * * ``memory`` - describes the physical memory available to the * kernel; this may differ from the actual physical memory installed * in the system, for instance when the memory is restricted with * ``mem=`` command line parameter * * ``reserved`` - describes the regions that were allocated |
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* * ``physmem`` - describes the actual physical memory available during * boot regardless of the possible restrictions and memory hot(un)plug; * the ``physmem`` type is only available on some architectures. |
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* |
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* Each region is represented by struct memblock_region that |
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* defines the region extents, its attributes and NUMA node id on NUMA |
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* systems. Every memory type is described by the struct memblock_type * which contains an array of memory regions along with |
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* the allocator metadata. The "memory" and "reserved" types are nicely |
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* wrapped with struct memblock. This structure is statically |
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* initialized at build time. The region arrays are initially sized to * %INIT_MEMBLOCK_REGIONS for "memory" and %INIT_MEMBLOCK_RESERVED_REGIONS * for "reserved". The region array for "physmem" is initially sized to * %INIT_PHYSMEM_REGIONS. |
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* The memblock_allow_resize() enables automatic resizing of the region * arrays during addition of new regions. This feature should be used * with care so that memory allocated for the region array will not * overlap with areas that should be reserved, for example initrd. |
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* * The early architecture setup should tell memblock what the physical |
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* memory layout is by using memblock_add() or memblock_add_node() * functions. The first function does not assign the region to a NUMA * node and it is appropriate for UMA systems. Yet, it is possible to * use it on NUMA systems as well and assign the region to a NUMA node * later in the setup process using memblock_set_node(). The * memblock_add_node() performs such an assignment directly. |
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* |
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* Once memblock is setup the memory can be allocated using one of the * API variants: * |
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* * memblock_phys_alloc*() - these functions return the **physical** * address of the allocated memory * * memblock_alloc*() - these functions return the **virtual** address * of the allocated memory. |
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* |
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* Note, that both API variants use implicit assumptions about allowed |
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* memory ranges and the fallback methods. Consult the documentation |
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* of memblock_alloc_internal() and memblock_alloc_range_nid() * functions for more elaborate description. |
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* |
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* As the system boot progresses, the architecture specific mem_init() * function frees all the memory to the buddy page allocator. |
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* |
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* Unless an architecture enables %CONFIG_ARCH_KEEP_MEMBLOCK, the |
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* memblock data structures (except "physmem") will be discarded after the * system initialization completes. |
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*/ |
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#ifndef CONFIG_NEED_MULTIPLE_NODES struct pglist_data __refdata contig_page_data; EXPORT_SYMBOL(contig_page_data); #endif unsigned long max_low_pfn; unsigned long min_low_pfn; unsigned long max_pfn; unsigned long long max_possible_pfn; |
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static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock; |
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static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_RESERVED_REGIONS] __initdata_memblock; |
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#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
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static struct memblock_region memblock_physmem_init_regions[INIT_PHYSMEM_REGIONS]; |
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#endif |
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struct memblock memblock __initdata_memblock = { .memory.regions = memblock_memory_init_regions, .memory.cnt = 1, /* empty dummy entry */ .memory.max = INIT_MEMBLOCK_REGIONS, |
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.memory.name = "memory", |
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.reserved.regions = memblock_reserved_init_regions, .reserved.cnt = 1, /* empty dummy entry */ |
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.reserved.max = INIT_MEMBLOCK_RESERVED_REGIONS, |
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.reserved.name = "reserved", |
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|
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.bottom_up = false, |
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.current_limit = MEMBLOCK_ALLOC_ANYWHERE, }; |
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#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP struct memblock_type physmem = { .regions = memblock_physmem_init_regions, .cnt = 1, /* empty dummy entry */ .max = INIT_PHYSMEM_REGIONS, .name = "physmem", }; #endif |
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/* * keep a pointer to &memblock.memory in the text section to use it in * __next_mem_range() and its helpers. * For architectures that do not keep memblock data after init, this * pointer will be reset to NULL at memblock_discard() */ static __refdata struct memblock_type *memblock_memory = &memblock.memory; |
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#define for_each_memblock_type(i, memblock_type, rgn) \ for (i = 0, rgn = &memblock_type->regions[0]; \ i < memblock_type->cnt; \ i++, rgn = &memblock_type->regions[i]) |
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#define memblock_dbg(fmt, ...) \ do { \ if (memblock_debug) \ pr_info(fmt, ##__VA_ARGS__); \ } while (0) static int memblock_debug __initdata_memblock; |
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static bool system_has_some_mirror __initdata_memblock = false; |
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static int memblock_can_resize __initdata_memblock; |
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static int memblock_memory_in_slab __initdata_memblock = 0; static int memblock_reserved_in_slab __initdata_memblock = 0; |
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static enum memblock_flags __init_memblock choose_memblock_flags(void) |
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{ return system_has_some_mirror ? MEMBLOCK_MIRROR : MEMBLOCK_NONE; } |
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/* adjust *@size so that (@base + *@size) doesn't overflow, return new size */ static inline phys_addr_t memblock_cap_size(phys_addr_t base, phys_addr_t *size) { |
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return *size = min(*size, PHYS_ADDR_MAX - base); |
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} |
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/* * Address comparison utilities */ |
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static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1, |
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phys_addr_t base2, phys_addr_t size2) |
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{ return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); } |
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bool __init_memblock memblock_overlaps_region(struct memblock_type *type, |
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phys_addr_t base, phys_addr_t size) |
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{ unsigned long i; |
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for (i = 0; i < type->cnt; i++) if (memblock_addrs_overlap(base, size, type->regions[i].base, type->regions[i].size)) |
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break; |
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return i < type->cnt; |
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} |
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/** |
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* __memblock_find_range_bottom_up - find free area utility in bottom-up * @start: start of candidate range |
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* @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or * %MEMBLOCK_ALLOC_ACCESSIBLE |
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* @size: size of free area to find * @align: alignment of free area to find |
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* @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
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* @flags: pick from blocks based on memory attributes |
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* * Utility called from memblock_find_in_range_node(), find free area bottom-up. * |
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* Return: |
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* Found address on success, 0 on failure. */ static phys_addr_t __init_memblock __memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end, |
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phys_addr_t size, phys_addr_t align, int nid, |
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enum memblock_flags flags) |
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{ phys_addr_t this_start, this_end, cand; u64 i; |
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for_each_free_mem_range(i, nid, flags, &this_start, &this_end, NULL) { |
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this_start = clamp(this_start, start, end); this_end = clamp(this_end, start, end); cand = round_up(this_start, align); if (cand < this_end && this_end - cand >= size) return cand; } return 0; } |
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/** |
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* __memblock_find_range_top_down - find free area utility, in top-down |
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* @start: start of candidate range |
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* @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or * %MEMBLOCK_ALLOC_ACCESSIBLE |
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* @size: size of free area to find * @align: alignment of free area to find |
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* @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
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* @flags: pick from blocks based on memory attributes |
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* |
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* Utility called from memblock_find_in_range_node(), find free area top-down. |
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* |
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* Return: |
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* Found address on success, 0 on failure. |
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*/ |
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static phys_addr_t __init_memblock __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end, |
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phys_addr_t size, phys_addr_t align, int nid, |
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enum memblock_flags flags) |
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{ phys_addr_t this_start, this_end, cand; u64 i; |
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for_each_free_mem_range_reverse(i, nid, flags, &this_start, &this_end, NULL) { |
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this_start = clamp(this_start, start, end); this_end = clamp(this_end, start, end); if (this_end < size) continue; cand = round_down(this_end - size, align); if (cand >= this_start) return cand; } |
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return 0; } |
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/** |
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* memblock_find_in_range_node - find free area in given range and node |
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* @size: size of free area to find * @align: alignment of free area to find |
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* @start: start of candidate range |
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* @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or * %MEMBLOCK_ALLOC_ACCESSIBLE |
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* @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
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* @flags: pick from blocks based on memory attributes |
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* * Find @size free area aligned to @align in the specified range and node. * |
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* When allocation direction is bottom-up, the @start should be greater * than the end of the kernel image. Otherwise, it will be trimmed. The * reason is that we want the bottom-up allocation just near the kernel * image so it is highly likely that the allocated memory and the kernel * will reside in the same node. * * If bottom-up allocation failed, will try to allocate memory top-down. * |
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* Return: |
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* Found address on success, 0 on failure. |
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*/ |
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static phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size, |
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phys_addr_t align, phys_addr_t start, |
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phys_addr_t end, int nid, enum memblock_flags flags) |
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{ |
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phys_addr_t kernel_end, ret; |
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|
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/* pump up @end */ |
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if (end == MEMBLOCK_ALLOC_ACCESSIBLE || end == MEMBLOCK_ALLOC_KASAN) |
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end = memblock.current_limit; /* avoid allocating the first page */ start = max_t(phys_addr_t, start, PAGE_SIZE); end = max(start, end); |
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kernel_end = __pa_symbol(_end); /* * try bottom-up allocation only when bottom-up mode * is set and @end is above the kernel image. */ if (memblock_bottom_up() && end > kernel_end) { phys_addr_t bottom_up_start; /* make sure we will allocate above the kernel */ bottom_up_start = max(start, kernel_end); /* ok, try bottom-up allocation first */ ret = __memblock_find_range_bottom_up(bottom_up_start, end, |
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size, align, nid, flags); |
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if (ret) return ret; /* * we always limit bottom-up allocation above the kernel, * but top-down allocation doesn't have the limit, so * retrying top-down allocation may succeed when bottom-up * allocation failed. * * bottom-up allocation is expected to be fail very rarely, * so we use WARN_ONCE() here to see the stack trace if * fail happens. */ |
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WARN_ONCE(IS_ENABLED(CONFIG_MEMORY_HOTREMOVE), "memblock: bottom-up allocation failed, memory hotremove may be affected "); |
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} |
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|
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return __memblock_find_range_top_down(start, end, size, align, nid, flags); |
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} /** |
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* memblock_find_in_range - find free area in given range * @start: start of candidate range |
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* @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or * %MEMBLOCK_ALLOC_ACCESSIBLE |
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* @size: size of free area to find * @align: alignment of free area to find * * Find @size free area aligned to @align in the specified range. * |
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* Return: |
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* Found address on success, 0 on failure. |
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*/ |
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phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start, phys_addr_t end, phys_addr_t size, phys_addr_t align) |
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{ |
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phys_addr_t ret; |
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enum memblock_flags flags = choose_memblock_flags(); |
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again: ret = memblock_find_in_range_node(size, align, start, end, NUMA_NO_NODE, flags); if (!ret && (flags & MEMBLOCK_MIRROR)) { pr_warn("Could not allocate %pap bytes of mirrored memory ", &size); flags &= ~MEMBLOCK_MIRROR; goto again; } return ret; |
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} |
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static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r) |
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{ |
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type->total_size -= type->regions[r].size; |
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memmove(&type->regions[r], &type->regions[r + 1], (type->cnt - (r + 1)) * sizeof(type->regions[r])); |
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type->cnt--; |
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/* Special case for empty arrays */ if (type->cnt == 0) { |
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WARN_ON(type->total_size != 0); |
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type->cnt = 1; type->regions[0].base = 0; type->regions[0].size = 0; |
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type->regions[0].flags = 0; |
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memblock_set_region_node(&type->regions[0], MAX_NUMNODES); |
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} |
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} |
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#ifndef CONFIG_ARCH_KEEP_MEMBLOCK |
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/** |
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* memblock_discard - discard memory and reserved arrays if they were allocated |
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*/ void __init memblock_discard(void) |
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{ |
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phys_addr_t addr, size; |
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|
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if (memblock.reserved.regions != memblock_reserved_init_regions) { addr = __pa(memblock.reserved.regions); size = PAGE_ALIGN(sizeof(struct memblock_region) * memblock.reserved.max); __memblock_free_late(addr, size); } |
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if (memblock.memory.regions != memblock_memory_init_regions) { |
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addr = __pa(memblock.memory.regions); size = PAGE_ALIGN(sizeof(struct memblock_region) * memblock.memory.max); __memblock_free_late(addr, size); } |
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398 399 |
memblock_memory = NULL; |
5e270e254 mm: free memblock... |
400 |
} |
5e270e254 mm: free memblock... |
401 |
#endif |
48c3b583b mm/memblock: fix ... |
402 403 404 405 406 407 408 409 |
/** * memblock_double_array - double the size of the memblock regions array * @type: memblock type of the regions array being doubled * @new_area_start: starting address of memory range to avoid overlap with * @new_area_size: size of memory range to avoid overlap with * * Double the size of the @type regions array. If memblock is being used to * allocate memory for a new reserved regions array and there is a previously |
47cec4432 docs/mm: memblock... |
410 |
* allocated memory range [@new_area_start, @new_area_start + @new_area_size] |
48c3b583b mm/memblock: fix ... |
411 412 413 |
* waiting to be reserved, ensure the memory used by the new array does * not overlap. * |
47cec4432 docs/mm: memblock... |
414 |
* Return: |
48c3b583b mm/memblock: fix ... |
415 416 417 418 419 |
* 0 on success, -1 on failure. */ static int __init_memblock memblock_double_array(struct memblock_type *type, phys_addr_t new_area_start, phys_addr_t new_area_size) |
142b45a72 memblock: Add arr... |
420 421 |
{ struct memblock_region *new_array, *old_array; |
29f673860 memblock: free al... |
422 |
phys_addr_t old_alloc_size, new_alloc_size; |
a36aab890 mm/memblock.c: re... |
423 |
phys_addr_t old_size, new_size, addr, new_end; |
142b45a72 memblock: Add arr... |
424 |
int use_slab = slab_is_available(); |
181eb3942 mm/memblock: fix ... |
425 |
int *in_slab; |
142b45a72 memblock: Add arr... |
426 427 428 429 430 431 |
/* We don't allow resizing until we know about the reserved regions * of memory that aren't suitable for allocation */ if (!memblock_can_resize) return -1; |
142b45a72 memblock: Add arr... |
432 433 434 |
/* Calculate new doubled size */ old_size = type->max * sizeof(struct memblock_region); new_size = old_size << 1; |
29f673860 memblock: free al... |
435 436 437 438 439 440 |
/* * We need to allocated new one align to PAGE_SIZE, * so we can free them completely later. */ old_alloc_size = PAGE_ALIGN(old_size); new_alloc_size = PAGE_ALIGN(new_size); |
142b45a72 memblock: Add arr... |
441 |
|
181eb3942 mm/memblock: fix ... |
442 443 444 445 446 |
/* Retrieve the slab flag */ if (type == &memblock.memory) in_slab = &memblock_memory_in_slab; else in_slab = &memblock_reserved_in_slab; |
a2974133b mm: memblock: upd... |
447 |
/* Try to find some space for it */ |
142b45a72 memblock: Add arr... |
448 449 |
if (use_slab) { new_array = kmalloc(new_size, GFP_KERNEL); |
1f5026a7e memblock: Kill ME... |
450 |
addr = new_array ? __pa(new_array) : 0; |
4e2f07750 mm/memblock: clea... |
451 |
} else { |
48c3b583b mm/memblock: fix ... |
452 453 454 455 456 457 |
/* only exclude range when trying to double reserved.regions */ if (type != &memblock.reserved) new_area_start = new_area_size = 0; addr = memblock_find_in_range(new_area_start + new_area_size, memblock.current_limit, |
29f673860 memblock: free al... |
458 |
new_alloc_size, PAGE_SIZE); |
48c3b583b mm/memblock: fix ... |
459 460 |
if (!addr && new_area_size) addr = memblock_find_in_range(0, |
fd07383b6 mm/memblock.c:mem... |
461 462 |
min(new_area_start, memblock.current_limit), new_alloc_size, PAGE_SIZE); |
48c3b583b mm/memblock: fix ... |
463 |
|
15674868d mm/memblock: Use ... |
464 |
new_array = addr ? __va(addr) : NULL; |
4e2f07750 mm/memblock: clea... |
465 |
} |
1f5026a7e memblock: Kill ME... |
466 |
if (!addr) { |
142b45a72 memblock: Add arr... |
467 468 |
pr_err("memblock: Failed to double %s array from %ld to %ld entries ! ", |
0262d9c84 memblock: embed m... |
469 |
type->name, type->max, type->max * 2); |
142b45a72 memblock: Add arr... |
470 471 |
return -1; } |
142b45a72 memblock: Add arr... |
472 |
|
a36aab890 mm/memblock.c: re... |
473 474 475 |
new_end = addr + new_size - 1; memblock_dbg("memblock: %s is doubled to %ld at [%pa-%pa]", type->name, type->max * 2, &addr, &new_end); |
ea9e4376b memblock: Improve... |
476 |
|
fd07383b6 mm/memblock.c:mem... |
477 478 479 480 |
/* * Found space, we now need to move the array over before we add the * reserved region since it may be our reserved array itself that is * full. |
142b45a72 memblock: Add arr... |
481 482 483 484 485 486 |
*/ memcpy(new_array, type->regions, old_size); memset(new_array + type->max, 0, old_size); old_array = type->regions; type->regions = new_array; type->max <<= 1; |
fd07383b6 mm/memblock.c:mem... |
487 |
/* Free old array. We needn't free it if the array is the static one */ |
181eb3942 mm/memblock: fix ... |
488 489 490 491 |
if (*in_slab) kfree(old_array); else if (old_array != memblock_memory_init_regions && old_array != memblock_reserved_init_regions) |
29f673860 memblock: free al... |
492 |
memblock_free(__pa(old_array), old_alloc_size); |
142b45a72 memblock: Add arr... |
493 |
|
fd07383b6 mm/memblock.c:mem... |
494 495 496 |
/* * Reserve the new array if that comes from the memblock. Otherwise, we * needn't do it |
181eb3942 mm/memblock: fix ... |
497 498 |
*/ if (!use_slab) |
29f673860 memblock: free al... |
499 |
BUG_ON(memblock_reserve(addr, new_alloc_size)); |
181eb3942 mm/memblock: fix ... |
500 501 502 |
/* Update slab flag */ *in_slab = use_slab; |
142b45a72 memblock: Add arr... |
503 504 |
return 0; } |
784656f9c memblock: Reimple... |
505 506 507 508 509 510 511 |
/** * memblock_merge_regions - merge neighboring compatible regions * @type: memblock type to scan * * Scan @type and merge neighboring compatible regions. */ static void __init_memblock memblock_merge_regions(struct memblock_type *type) |
95f72d1ed lmb: rename to me... |
512 |
{ |
784656f9c memblock: Reimple... |
513 |
int i = 0; |
95f72d1ed lmb: rename to me... |
514 |
|
784656f9c memblock: Reimple... |
515 516 517 518 |
/* cnt never goes below 1 */ while (i < type->cnt - 1) { struct memblock_region *this = &type->regions[i]; struct memblock_region *next = &type->regions[i + 1]; |
95f72d1ed lmb: rename to me... |
519 |
|
7c0caeb86 memblock: Add opt... |
520 521 |
if (this->base + this->size != next->base || memblock_get_region_node(this) != |
66a207572 memblock, numa: i... |
522 523 |
memblock_get_region_node(next) || this->flags != next->flags) { |
784656f9c memblock: Reimple... |
524 525 526 |
BUG_ON(this->base + this->size > next->base); i++; continue; |
8f7a66051 mm/memblock: prop... |
527 |
} |
784656f9c memblock: Reimple... |
528 |
this->size += next->size; |
c0232ae86 mm: memblock: fix... |
529 530 |
/* move forward from next + 1, index of which is i + 2 */ memmove(next, next + 1, (type->cnt - (i + 2)) * sizeof(*next)); |
784656f9c memblock: Reimple... |
531 |
type->cnt--; |
95f72d1ed lmb: rename to me... |
532 |
} |
784656f9c memblock: Reimple... |
533 |
} |
95f72d1ed lmb: rename to me... |
534 |
|
784656f9c memblock: Reimple... |
535 536 |
/** * memblock_insert_region - insert new memblock region |
209ff86d6 memblock: fix mis... |
537 538 539 540 541 |
* @type: memblock type to insert into * @idx: index for the insertion point * @base: base address of the new region * @size: size of the new region * @nid: node id of the new region |
66a207572 memblock, numa: i... |
542 |
* @flags: flags of the new region |
784656f9c memblock: Reimple... |
543 |
* |
47cec4432 docs/mm: memblock... |
544 |
* Insert new memblock region [@base, @base + @size) into @type at @idx. |
412d0008d mm/memblock: fix ... |
545 |
* @type must already have extra room to accommodate the new region. |
784656f9c memblock: Reimple... |
546 547 548 |
*/ static void __init_memblock memblock_insert_region(struct memblock_type *type, int idx, phys_addr_t base, |
66a207572 memblock, numa: i... |
549 |
phys_addr_t size, |
e1720fee2 mm/memblock: add ... |
550 551 |
int nid, enum memblock_flags flags) |
784656f9c memblock: Reimple... |
552 553 554 555 556 557 558 |
{ struct memblock_region *rgn = &type->regions[idx]; BUG_ON(type->cnt >= type->max); memmove(rgn + 1, rgn, (type->cnt - idx) * sizeof(*rgn)); rgn->base = base; rgn->size = size; |
66a207572 memblock, numa: i... |
559 |
rgn->flags = flags; |
7c0caeb86 memblock: Add opt... |
560 |
memblock_set_region_node(rgn, nid); |
784656f9c memblock: Reimple... |
561 |
type->cnt++; |
1440c4e2c memblock: Track t... |
562 |
type->total_size += size; |
784656f9c memblock: Reimple... |
563 564 565 |
} /** |
f1af9d3af mm/memblock: Do s... |
566 |
* memblock_add_range - add new memblock region |
784656f9c memblock: Reimple... |
567 568 569 |
* @type: memblock type to add new region into * @base: base address of the new region * @size: size of the new region |
7fb0bc3f0 memblock: Impleme... |
570 |
* @nid: nid of the new region |
66a207572 memblock, numa: i... |
571 |
* @flags: flags of the new region |
784656f9c memblock: Reimple... |
572 |
* |
47cec4432 docs/mm: memblock... |
573 |
* Add new memblock region [@base, @base + @size) into @type. The new region |
784656f9c memblock: Reimple... |
574 575 576 577 |
* is allowed to overlap with existing ones - overlaps don't affect already * existing regions. @type is guaranteed to be minimal (all neighbouring * compatible regions are merged) after the addition. * |
47cec4432 docs/mm: memblock... |
578 |
* Return: |
784656f9c memblock: Reimple... |
579 580 |
* 0 on success, -errno on failure. */ |
02634a44b mm/memblock: defi... |
581 |
static int __init_memblock memblock_add_range(struct memblock_type *type, |
66a207572 memblock, numa: i... |
582 |
phys_addr_t base, phys_addr_t size, |
e1720fee2 mm/memblock: add ... |
583 |
int nid, enum memblock_flags flags) |
784656f9c memblock: Reimple... |
584 585 |
{ bool insert = false; |
eb18f1b5b memblock: Make me... |
586 587 |
phys_addr_t obase = base; phys_addr_t end = base + memblock_cap_size(base, &size); |
8c9c1701c mm/memblock: intr... |
588 589 |
int idx, nr_new; struct memblock_region *rgn; |
784656f9c memblock: Reimple... |
590 |
|
b3dc627ca memblock: membloc... |
591 592 |
if (!size) return 0; |
784656f9c memblock: Reimple... |
593 594 |
/* special case for empty array */ if (type->regions[0].size == 0) { |
1440c4e2c memblock: Track t... |
595 |
WARN_ON(type->cnt != 1 || type->total_size); |
8f7a66051 mm/memblock: prop... |
596 597 |
type->regions[0].base = base; type->regions[0].size = size; |
66a207572 memblock, numa: i... |
598 |
type->regions[0].flags = flags; |
7fb0bc3f0 memblock: Impleme... |
599 |
memblock_set_region_node(&type->regions[0], nid); |
1440c4e2c memblock: Track t... |
600 |
type->total_size = size; |
8f7a66051 mm/memblock: prop... |
601 |
return 0; |
95f72d1ed lmb: rename to me... |
602 |
} |
784656f9c memblock: Reimple... |
603 604 605 606 |
repeat: /* * The following is executed twice. Once with %false @insert and * then with %true. The first counts the number of regions needed |
412d0008d mm/memblock: fix ... |
607 |
* to accommodate the new area. The second actually inserts them. |
142b45a72 memblock: Add arr... |
608 |
*/ |
784656f9c memblock: Reimple... |
609 610 |
base = obase; nr_new = 0; |
95f72d1ed lmb: rename to me... |
611 |
|
66e8b438b mm/memblock.c: ma... |
612 |
for_each_memblock_type(idx, type, rgn) { |
784656f9c memblock: Reimple... |
613 614 615 616 |
phys_addr_t rbase = rgn->base; phys_addr_t rend = rbase + rgn->size; if (rbase >= end) |
95f72d1ed lmb: rename to me... |
617 |
break; |
784656f9c memblock: Reimple... |
618 619 620 621 622 623 624 |
if (rend <= base) continue; /* * @rgn overlaps. If it separates the lower part of new * area, insert that portion. */ if (rbase > base) { |
3f08a302f mm: remove CONFIG... |
625 |
#ifdef CONFIG_NEED_MULTIPLE_NODES |
c0a294988 mm/memblock: WARN... |
626 627 |
WARN_ON(nid != memblock_get_region_node(rgn)); #endif |
4fcab5f43 mm/memblock.c: WA... |
628 |
WARN_ON(flags != rgn->flags); |
784656f9c memblock: Reimple... |
629 630 |
nr_new++; if (insert) |
8c9c1701c mm/memblock: intr... |
631 |
memblock_insert_region(type, idx++, base, |
66a207572 memblock, numa: i... |
632 633 |
rbase - base, nid, flags); |
95f72d1ed lmb: rename to me... |
634 |
} |
784656f9c memblock: Reimple... |
635 636 |
/* area below @rend is dealt with, forget about it */ base = min(rend, end); |
95f72d1ed lmb: rename to me... |
637 |
} |
784656f9c memblock: Reimple... |
638 639 640 641 642 |
/* insert the remaining portion */ if (base < end) { nr_new++; if (insert) |
8c9c1701c mm/memblock: intr... |
643 |
memblock_insert_region(type, idx, base, end - base, |
66a207572 memblock, numa: i... |
644 |
nid, flags); |
95f72d1ed lmb: rename to me... |
645 |
} |
95f72d1ed lmb: rename to me... |
646 |
|
ef3cc4db4 mm/memblock.c:mem... |
647 648 |
if (!nr_new) return 0; |
784656f9c memblock: Reimple... |
649 650 651 |
/* * If this was the first round, resize array and repeat for actual * insertions; otherwise, merge and return. |
142b45a72 memblock: Add arr... |
652 |
*/ |
784656f9c memblock: Reimple... |
653 654 |
if (!insert) { while (type->cnt + nr_new > type->max) |
48c3b583b mm/memblock: fix ... |
655 |
if (memblock_double_array(type, obase, size) < 0) |
784656f9c memblock: Reimple... |
656 657 658 659 660 661 |
return -ENOMEM; insert = true; goto repeat; } else { memblock_merge_regions(type); return 0; |
142b45a72 memblock: Add arr... |
662 |
} |
95f72d1ed lmb: rename to me... |
663 |
} |
48a833cc7 docs/mm: memblock... |
664 665 666 667 668 669 670 671 672 673 674 675 |
/** * memblock_add_node - add new memblock region within a NUMA node * @base: base address of the new region * @size: size of the new region * @nid: nid of the new region * * Add new memblock region [@base, @base + @size) to the "memory" * type. See memblock_add_range() description for mode details * * Return: * 0 on success, -errno on failure. */ |
7fb0bc3f0 memblock: Impleme... |
676 677 678 |
int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size, int nid) { |
f1af9d3af mm/memblock: Do s... |
679 |
return memblock_add_range(&memblock.memory, base, size, nid, 0); |
7fb0bc3f0 memblock: Impleme... |
680 |
} |
48a833cc7 docs/mm: memblock... |
681 682 683 684 685 686 687 688 689 690 691 |
/** * memblock_add - add new memblock region * @base: base address of the new region * @size: size of the new region * * Add new memblock region [@base, @base + @size) to the "memory" * type. See memblock_add_range() description for mode details * * Return: * 0 on success, -errno on failure. */ |
f705ac4b3 mm/memblock.c: mo... |
692 |
int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) |
6a4055bc7 mm/memblock.c: ad... |
693 |
{ |
5d63f81c9 mm/memblock.c: re... |
694 |
phys_addr_t end = base + size - 1; |
a090d711d memblock: Use __f... |
695 696 |
memblock_dbg("%s: [%pa-%pa] %pS ", __func__, |
5d63f81c9 mm/memblock.c: re... |
697 |
&base, &end, (void *)_RET_IP_); |
6a4055bc7 mm/memblock.c: ad... |
698 |
|
f705ac4b3 mm/memblock.c: mo... |
699 |
return memblock_add_range(&memblock.memory, base, size, MAX_NUMNODES, 0); |
95f72d1ed lmb: rename to me... |
700 |
} |
6a9ceb31c memblock: Separat... |
701 702 703 704 705 706 707 708 709 |
/** * memblock_isolate_range - isolate given range into disjoint memblocks * @type: memblock type to isolate range for * @base: base of range to isolate * @size: size of range to isolate * @start_rgn: out parameter for the start of isolated region * @end_rgn: out parameter for the end of isolated region * * Walk @type and ensure that regions don't cross the boundaries defined by |
47cec4432 docs/mm: memblock... |
710 |
* [@base, @base + @size). Crossing regions are split at the boundaries, |
6a9ceb31c memblock: Separat... |
711 712 713 |
* which may create at most two more regions. The index of the first * region inside the range is returned in *@start_rgn and end in *@end_rgn. * |
47cec4432 docs/mm: memblock... |
714 |
* Return: |
6a9ceb31c memblock: Separat... |
715 716 717 718 719 720 |
* 0 on success, -errno on failure. */ static int __init_memblock memblock_isolate_range(struct memblock_type *type, phys_addr_t base, phys_addr_t size, int *start_rgn, int *end_rgn) { |
eb18f1b5b memblock: Make me... |
721 |
phys_addr_t end = base + memblock_cap_size(base, &size); |
8c9c1701c mm/memblock: intr... |
722 723 |
int idx; struct memblock_region *rgn; |
6a9ceb31c memblock: Separat... |
724 725 |
*start_rgn = *end_rgn = 0; |
b3dc627ca memblock: membloc... |
726 727 |
if (!size) return 0; |
6a9ceb31c memblock: Separat... |
728 729 |
/* we'll create at most two more regions */ while (type->cnt + 2 > type->max) |
48c3b583b mm/memblock: fix ... |
730 |
if (memblock_double_array(type, base, size) < 0) |
6a9ceb31c memblock: Separat... |
731 |
return -ENOMEM; |
66e8b438b mm/memblock.c: ma... |
732 |
for_each_memblock_type(idx, type, rgn) { |
6a9ceb31c memblock: Separat... |
733 734 735 736 737 738 739 740 741 742 743 744 745 746 |
phys_addr_t rbase = rgn->base; phys_addr_t rend = rbase + rgn->size; if (rbase >= end) break; if (rend <= base) continue; if (rbase < base) { /* * @rgn intersects from below. Split and continue * to process the next region - the new top half. */ rgn->base = base; |
1440c4e2c memblock: Track t... |
747 748 |
rgn->size -= base - rbase; type->total_size -= base - rbase; |
8c9c1701c mm/memblock: intr... |
749 |
memblock_insert_region(type, idx, rbase, base - rbase, |
66a207572 memblock, numa: i... |
750 751 |
memblock_get_region_node(rgn), rgn->flags); |
6a9ceb31c memblock: Separat... |
752 753 754 755 756 757 |
} else if (rend > end) { /* * @rgn intersects from above. Split and redo the * current region - the new bottom half. */ rgn->base = end; |
1440c4e2c memblock: Track t... |
758 759 |
rgn->size -= end - rbase; type->total_size -= end - rbase; |
8c9c1701c mm/memblock: intr... |
760 |
memblock_insert_region(type, idx--, rbase, end - rbase, |
66a207572 memblock, numa: i... |
761 762 |
memblock_get_region_node(rgn), rgn->flags); |
6a9ceb31c memblock: Separat... |
763 764 765 |
} else { /* @rgn is fully contained, record it */ if (!*end_rgn) |
8c9c1701c mm/memblock: intr... |
766 767 |
*start_rgn = idx; *end_rgn = idx + 1; |
6a9ceb31c memblock: Separat... |
768 769 770 771 772 |
} } return 0; } |
6a9ceb31c memblock: Separat... |
773 |
|
35bd16a22 mm/memblock: make... |
774 |
static int __init_memblock memblock_remove_range(struct memblock_type *type, |
f1af9d3af mm/memblock: Do s... |
775 |
phys_addr_t base, phys_addr_t size) |
95f72d1ed lmb: rename to me... |
776 |
{ |
719361809 memblock: Reimple... |
777 778 |
int start_rgn, end_rgn; int i, ret; |
95f72d1ed lmb: rename to me... |
779 |
|
719361809 memblock: Reimple... |
780 781 782 |
ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); if (ret) return ret; |
95f72d1ed lmb: rename to me... |
783 |
|
719361809 memblock: Reimple... |
784 785 |
for (i = end_rgn - 1; i >= start_rgn; i--) memblock_remove_region(type, i); |
8f7a66051 mm/memblock: prop... |
786 |
return 0; |
95f72d1ed lmb: rename to me... |
787 |
} |
581adcbe1 memblock: Make me... |
788 |
int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) |
95f72d1ed lmb: rename to me... |
789 |
{ |
25cf23d7a mm/memblock: prin... |
790 |
phys_addr_t end = base + size - 1; |
a090d711d memblock: Use __f... |
791 792 |
memblock_dbg("%s: [%pa-%pa] %pS ", __func__, |
25cf23d7a mm/memblock: prin... |
793 |
&base, &end, (void *)_RET_IP_); |
f1af9d3af mm/memblock: Do s... |
794 |
return memblock_remove_range(&memblock.memory, base, size); |
95f72d1ed lmb: rename to me... |
795 |
} |
4d72868c8 memblock: replace... |
796 797 798 799 800 801 802 803 |
/** * memblock_free - free boot memory block * @base: phys starting address of the boot memory block * @size: size of the boot memory block in bytes * * Free boot memory block previously allocated by memblock_alloc_xx() API. * The freeing memory will not be released to the buddy allocator. */ |
581adcbe1 memblock: Make me... |
804 |
int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size) |
95f72d1ed lmb: rename to me... |
805 |
{ |
5d63f81c9 mm/memblock.c: re... |
806 |
phys_addr_t end = base + size - 1; |
a090d711d memblock: Use __f... |
807 808 |
memblock_dbg("%s: [%pa-%pa] %pS ", __func__, |
5d63f81c9 mm/memblock.c: re... |
809 |
&base, &end, (void *)_RET_IP_); |
24aa07882 memblock, x86: Re... |
810 |
|
9099daed9 mm: kmemleak: avo... |
811 |
kmemleak_free_part_phys(base, size); |
f1af9d3af mm/memblock: Do s... |
812 |
return memblock_remove_range(&memblock.reserved, base, size); |
95f72d1ed lmb: rename to me... |
813 |
} |
2eeee9f41 ANDROID: GKI: Exp... |
814 815 816 |
#ifdef CONFIG_ARCH_KEEP_MEMBLOCK EXPORT_SYMBOL_GPL(memblock_free); #endif |
95f72d1ed lmb: rename to me... |
817 |
|
f705ac4b3 mm/memblock.c: mo... |
818 |
int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) |
95f72d1ed lmb: rename to me... |
819 |
{ |
5d63f81c9 mm/memblock.c: re... |
820 |
phys_addr_t end = base + size - 1; |
a090d711d memblock: Use __f... |
821 822 |
memblock_dbg("%s: [%pa-%pa] %pS ", __func__, |
5d63f81c9 mm/memblock.c: re... |
823 |
&base, &end, (void *)_RET_IP_); |
95f72d1ed lmb: rename to me... |
824 |
|
f705ac4b3 mm/memblock.c: mo... |
825 |
return memblock_add_range(&memblock.reserved, base, size, MAX_NUMNODES, 0); |
95f72d1ed lmb: rename to me... |
826 |
} |
02634a44b mm/memblock: defi... |
827 828 829 830 831 832 833 834 |
#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP int __init_memblock memblock_physmem_add(phys_addr_t base, phys_addr_t size) { phys_addr_t end = base + size - 1; memblock_dbg("%s: [%pa-%pa] %pS ", __func__, &base, &end, (void *)_RET_IP_); |
776499058 mm/memblock: expo... |
835 |
return memblock_add_range(&physmem, base, size, MAX_NUMNODES, 0); |
02634a44b mm/memblock: defi... |
836 837 |
} #endif |
35fd0808d memblock: Impleme... |
838 |
/** |
47cec4432 docs/mm: memblock... |
839 840 841 842 843 |
* memblock_setclr_flag - set or clear flag for a memory region * @base: base address of the region * @size: size of the region * @set: set or clear the flag * @flag: the flag to udpate |
66b16edf9 memblock, mem_hot... |
844 |
* |
4308ce17f mm/memblock.c: re... |
845 |
* This function isolates region [@base, @base + @size), and sets/clears flag |
66b16edf9 memblock, mem_hot... |
846 |
* |
47cec4432 docs/mm: memblock... |
847 |
* Return: 0 on success, -errno on failure. |
66b16edf9 memblock, mem_hot... |
848 |
*/ |
4308ce17f mm/memblock.c: re... |
849 850 |
static int __init_memblock memblock_setclr_flag(phys_addr_t base, phys_addr_t size, int set, int flag) |
66b16edf9 memblock, mem_hot... |
851 852 853 854 855 856 857 |
{ struct memblock_type *type = &memblock.memory; int i, ret, start_rgn, end_rgn; ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); if (ret) return ret; |
fe145124d memblock: remove ... |
858 859 |
for (i = start_rgn; i < end_rgn; i++) { struct memblock_region *r = &type->regions[i]; |
4308ce17f mm/memblock.c: re... |
860 |
if (set) |
fe145124d memblock: remove ... |
861 |
r->flags |= flag; |
4308ce17f mm/memblock.c: re... |
862 |
else |
fe145124d memblock: remove ... |
863 864 |
r->flags &= ~flag; } |
66b16edf9 memblock, mem_hot... |
865 866 867 868 869 870 |
memblock_merge_regions(type); return 0; } /** |
4308ce17f mm/memblock.c: re... |
871 |
* memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG. |
66b16edf9 memblock, mem_hot... |
872 873 874 |
* @base: the base phys addr of the region * @size: the size of the region * |
47cec4432 docs/mm: memblock... |
875 |
* Return: 0 on success, -errno on failure. |
4308ce17f mm/memblock.c: re... |
876 877 878 879 880 881 882 883 884 885 |
*/ int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size) { return memblock_setclr_flag(base, size, 1, MEMBLOCK_HOTPLUG); } /** * memblock_clear_hotplug - Clear flag MEMBLOCK_HOTPLUG for a specified region. * @base: the base phys addr of the region * @size: the size of the region |
66b16edf9 memblock, mem_hot... |
886 |
* |
47cec4432 docs/mm: memblock... |
887 |
* Return: 0 on success, -errno on failure. |
66b16edf9 memblock, mem_hot... |
888 889 890 |
*/ int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size) { |
4308ce17f mm/memblock.c: re... |
891 |
return memblock_setclr_flag(base, size, 0, MEMBLOCK_HOTPLUG); |
66b16edf9 memblock, mem_hot... |
892 893 894 |
} /** |
a3f5bafcc mm/memblock: allo... |
895 896 897 898 |
* memblock_mark_mirror - Mark mirrored memory with flag MEMBLOCK_MIRROR. * @base: the base phys addr of the region * @size: the size of the region * |
47cec4432 docs/mm: memblock... |
899 |
* Return: 0 on success, -errno on failure. |
a3f5bafcc mm/memblock: allo... |
900 901 902 903 904 905 906 |
*/ int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size) { system_has_some_mirror = true; return memblock_setclr_flag(base, size, 1, MEMBLOCK_MIRROR); } |
bf3d3cc58 mm/memblock: add ... |
907 908 909 910 911 |
/** * memblock_mark_nomap - Mark a memory region with flag MEMBLOCK_NOMAP. * @base: the base phys addr of the region * @size: the size of the region * |
47cec4432 docs/mm: memblock... |
912 |
* Return: 0 on success, -errno on failure. |
bf3d3cc58 mm/memblock: add ... |
913 914 915 916 917 |
*/ int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size) { return memblock_setclr_flag(base, size, 1, MEMBLOCK_NOMAP); } |
a3f5bafcc mm/memblock: allo... |
918 919 |
/** |
4c546b8a3 memblock: add mem... |
920 921 922 923 |
* memblock_clear_nomap - Clear flag MEMBLOCK_NOMAP for a specified region. * @base: the base phys addr of the region * @size: the size of the region * |
47cec4432 docs/mm: memblock... |
924 |
* Return: 0 on success, -errno on failure. |
4c546b8a3 memblock: add mem... |
925 926 927 928 929 |
*/ int __init_memblock memblock_clear_nomap(phys_addr_t base, phys_addr_t size) { return memblock_setclr_flag(base, size, 0, MEMBLOCK_NOMAP); } |
9f3d5eaa3 memblock: impleme... |
930 931 932 |
static bool should_skip_region(struct memblock_type *type, struct memblock_region *m, int nid, int flags) |
c9a688a3e memblock: split c... |
933 934 |
{ int m_nid = memblock_get_region_node(m); |
9f3d5eaa3 memblock: impleme... |
935 936 937 |
/* we never skip regions when iterating memblock.reserved or physmem */ if (type != memblock_memory) return false; |
c9a688a3e memblock: split c... |
938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 |
/* only memory regions are associated with nodes, check it */ if (nid != NUMA_NO_NODE && nid != m_nid) return true; /* skip hotpluggable memory regions if needed */ if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) return true; /* if we want mirror memory skip non-mirror memory regions */ if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) return true; /* skip nomap memory unless we were asked for it explicitly */ if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) return true; return false; } |
8e7a7f861 memblock: introdu... |
956 |
/** |
a2974133b mm: memblock: upd... |
957 |
* __next_mem_range - next function for for_each_free_mem_range() etc. |
35fd0808d memblock: Impleme... |
958 |
* @idx: pointer to u64 loop variable |
b11542335 mm/memblock: swit... |
959 |
* @nid: node selector, %NUMA_NO_NODE for all nodes |
fc6daaf93 mm/memblock: add ... |
960 |
* @flags: pick from blocks based on memory attributes |
f1af9d3af mm/memblock: Do s... |
961 962 |
* @type_a: pointer to memblock_type from where the range is taken * @type_b: pointer to memblock_type which excludes memory from being taken |
dad7557eb mm: fix kernel-do... |
963 964 965 |
* @out_start: ptr to phys_addr_t for start address of the range, can be %NULL * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL * @out_nid: ptr to int for nid of the range, can be %NULL |
35fd0808d memblock: Impleme... |
966 |
* |
f1af9d3af mm/memblock: Do s... |
967 |
* Find the first area from *@idx which matches @nid, fill the out |
35fd0808d memblock: Impleme... |
968 |
* parameters, and update *@idx for the next iteration. The lower 32bit of |
f1af9d3af mm/memblock: Do s... |
969 970 |
* *@idx contains index into type_a and the upper 32bit indexes the * areas before each region in type_b. For example, if type_b regions |
35fd0808d memblock: Impleme... |
971 972 973 974 975 976 977 978 979 980 981 |
* look like the following, * * 0:[0-16), 1:[32-48), 2:[128-130) * * The upper 32bit indexes the following regions. * * 0:[0-0), 1:[16-32), 2:[48-128), 3:[130-MAX) * * As both region arrays are sorted, the function advances the two indices * in lockstep and returns each intersection. */ |
776499058 mm/memblock: expo... |
982 983 984 985 |
void __next_mem_range(u64 *idx, int nid, enum memblock_flags flags, struct memblock_type *type_a, struct memblock_type *type_b, phys_addr_t *out_start, phys_addr_t *out_end, int *out_nid) |
35fd0808d memblock: Impleme... |
986 |
{ |
f1af9d3af mm/memblock: Do s... |
987 988 |
int idx_a = *idx & 0xffffffff; int idx_b = *idx >> 32; |
b11542335 mm/memblock: swit... |
989 |
|
f1af9d3af mm/memblock: Do s... |
990 991 992 |
if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead ")) |
560dca27a mm/memblock: use ... |
993 |
nid = NUMA_NO_NODE; |
35fd0808d memblock: Impleme... |
994 |
|
f1af9d3af mm/memblock: Do s... |
995 996 |
for (; idx_a < type_a->cnt; idx_a++) { struct memblock_region *m = &type_a->regions[idx_a]; |
35fd0808d memblock: Impleme... |
997 998 |
phys_addr_t m_start = m->base; phys_addr_t m_end = m->base + m->size; |
f1af9d3af mm/memblock: Do s... |
999 |
int m_nid = memblock_get_region_node(m); |
35fd0808d memblock: Impleme... |
1000 |
|
9f3d5eaa3 memblock: impleme... |
1001 |
if (should_skip_region(type_a, m, nid, flags)) |
bf3d3cc58 mm/memblock: add ... |
1002 |
continue; |
f1af9d3af mm/memblock: Do s... |
1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 |
if (!type_b) { if (out_start) *out_start = m_start; if (out_end) *out_end = m_end; if (out_nid) *out_nid = m_nid; idx_a++; *idx = (u32)idx_a | (u64)idx_b << 32; return; } /* scan areas before each reservation */ for (; idx_b < type_b->cnt + 1; idx_b++) { struct memblock_region *r; phys_addr_t r_start; phys_addr_t r_end; r = &type_b->regions[idx_b]; r_start = idx_b ? r[-1].base + r[-1].size : 0; r_end = idx_b < type_b->cnt ? |
1c4bc43dd mm/memblock: intr... |
1024 |
r->base : PHYS_ADDR_MAX; |
35fd0808d memblock: Impleme... |
1025 |
|
f1af9d3af mm/memblock: Do s... |
1026 1027 1028 1029 |
/* * if idx_b advanced past idx_a, * break out to advance idx_a */ |
35fd0808d memblock: Impleme... |
1030 1031 1032 1033 1034 |
if (r_start >= m_end) break; /* if the two regions intersect, we're done */ if (m_start < r_end) { if (out_start) |
f1af9d3af mm/memblock: Do s... |
1035 1036 |
*out_start = max(m_start, r_start); |
35fd0808d memblock: Impleme... |
1037 1038 1039 |
if (out_end) *out_end = min(m_end, r_end); if (out_nid) |
f1af9d3af mm/memblock: Do s... |
1040 |
*out_nid = m_nid; |
35fd0808d memblock: Impleme... |
1041 |
/* |
f1af9d3af mm/memblock: Do s... |
1042 1043 |
* The region which ends first is * advanced for the next iteration. |
35fd0808d memblock: Impleme... |
1044 1045 |
*/ if (m_end <= r_end) |
f1af9d3af mm/memblock: Do s... |
1046 |
idx_a++; |
35fd0808d memblock: Impleme... |
1047 |
else |
f1af9d3af mm/memblock: Do s... |
1048 1049 |
idx_b++; *idx = (u32)idx_a | (u64)idx_b << 32; |
35fd0808d memblock: Impleme... |
1050 1051 1052 1053 1054 1055 1056 1057 |
return; } } } /* signal end of iteration */ *idx = ULLONG_MAX; } |
7bd0b0f0d memblock: Reimple... |
1058 |
/** |
f1af9d3af mm/memblock: Do s... |
1059 1060 |
* __next_mem_range_rev - generic next function for for_each_*_range_rev() * |
7bd0b0f0d memblock: Reimple... |
1061 |
* @idx: pointer to u64 loop variable |
ad5ea8cd5 mm/memblock.c: fi... |
1062 |
* @nid: node selector, %NUMA_NO_NODE for all nodes |
fc6daaf93 mm/memblock: add ... |
1063 |
* @flags: pick from blocks based on memory attributes |
f1af9d3af mm/memblock: Do s... |
1064 1065 |
* @type_a: pointer to memblock_type from where the range is taken * @type_b: pointer to memblock_type which excludes memory from being taken |
dad7557eb mm: fix kernel-do... |
1066 1067 1068 |
* @out_start: ptr to phys_addr_t for start address of the range, can be %NULL * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL * @out_nid: ptr to int for nid of the range, can be %NULL |
7bd0b0f0d memblock: Reimple... |
1069 |
* |
47cec4432 docs/mm: memblock... |
1070 1071 1072 |
* Finds the next range from type_a which is not marked as unsuitable * in type_b. * |
f1af9d3af mm/memblock: Do s... |
1073 |
* Reverse of __next_mem_range(). |
7bd0b0f0d memblock: Reimple... |
1074 |
*/ |
e1720fee2 mm/memblock: add ... |
1075 1076 |
void __init_memblock __next_mem_range_rev(u64 *idx, int nid, enum memblock_flags flags, |
f1af9d3af mm/memblock: Do s... |
1077 1078 1079 1080 |
struct memblock_type *type_a, struct memblock_type *type_b, phys_addr_t *out_start, phys_addr_t *out_end, int *out_nid) |
7bd0b0f0d memblock: Reimple... |
1081 |
{ |
f1af9d3af mm/memblock: Do s... |
1082 1083 |
int idx_a = *idx & 0xffffffff; int idx_b = *idx >> 32; |
b11542335 mm/memblock: swit... |
1084 |
|
560dca27a mm/memblock: use ... |
1085 1086 1087 |
if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead ")) nid = NUMA_NO_NODE; |
7bd0b0f0d memblock: Reimple... |
1088 1089 |
if (*idx == (u64)ULLONG_MAX) { |
f1af9d3af mm/memblock: Do s... |
1090 |
idx_a = type_a->cnt - 1; |
e47608ab6 mm/memblock.c: fi... |
1091 1092 1093 1094 |
if (type_b != NULL) idx_b = type_b->cnt; else idx_b = 0; |
7bd0b0f0d memblock: Reimple... |
1095 |
} |
f1af9d3af mm/memblock: Do s... |
1096 1097 |
for (; idx_a >= 0; idx_a--) { struct memblock_region *m = &type_a->regions[idx_a]; |
7bd0b0f0d memblock: Reimple... |
1098 1099 |
phys_addr_t m_start = m->base; phys_addr_t m_end = m->base + m->size; |
f1af9d3af mm/memblock: Do s... |
1100 |
int m_nid = memblock_get_region_node(m); |
7bd0b0f0d memblock: Reimple... |
1101 |
|
9f3d5eaa3 memblock: impleme... |
1102 |
if (should_skip_region(type_a, m, nid, flags)) |
bf3d3cc58 mm/memblock: add ... |
1103 |
continue; |
f1af9d3af mm/memblock: Do s... |
1104 1105 1106 1107 1108 1109 1110 |
if (!type_b) { if (out_start) *out_start = m_start; if (out_end) *out_end = m_end; if (out_nid) *out_nid = m_nid; |
fb399b485 mm/memblock.c: fi... |
1111 |
idx_a--; |
f1af9d3af mm/memblock: Do s... |
1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 |
*idx = (u32)idx_a | (u64)idx_b << 32; return; } /* scan areas before each reservation */ for (; idx_b >= 0; idx_b--) { struct memblock_region *r; phys_addr_t r_start; phys_addr_t r_end; r = &type_b->regions[idx_b]; r_start = idx_b ? r[-1].base + r[-1].size : 0; r_end = idx_b < type_b->cnt ? |
1c4bc43dd mm/memblock: intr... |
1125 |
r->base : PHYS_ADDR_MAX; |
f1af9d3af mm/memblock: Do s... |
1126 1127 1128 1129 |
/* * if idx_b advanced past idx_a, * break out to advance idx_a */ |
7bd0b0f0d memblock: Reimple... |
1130 |
|
7bd0b0f0d memblock: Reimple... |
1131 1132 1133 1134 1135 1136 1137 1138 1139 |
if (r_end <= m_start) break; /* if the two regions intersect, we're done */ if (m_end > r_start) { if (out_start) *out_start = max(m_start, r_start); if (out_end) *out_end = min(m_end, r_end); if (out_nid) |
f1af9d3af mm/memblock: Do s... |
1140 |
*out_nid = m_nid; |
7bd0b0f0d memblock: Reimple... |
1141 |
if (m_start >= r_start) |
f1af9d3af mm/memblock: Do s... |
1142 |
idx_a--; |
7bd0b0f0d memblock: Reimple... |
1143 |
else |
f1af9d3af mm/memblock: Do s... |
1144 1145 |
idx_b--; *idx = (u32)idx_a | (u64)idx_b << 32; |
7bd0b0f0d memblock: Reimple... |
1146 1147 1148 1149 |
return; } } } |
f1af9d3af mm/memblock: Do s... |
1150 |
/* signal end of iteration */ |
7bd0b0f0d memblock: Reimple... |
1151 1152 |
*idx = ULLONG_MAX; } |
7c0caeb86 memblock: Add opt... |
1153 |
/* |
45e79815b mm/memblock.c: fi... |
1154 |
* Common iterator interface used to define for_each_mem_pfn_range(). |
7c0caeb86 memblock: Add opt... |
1155 1156 1157 1158 1159 1160 1161 |
*/ void __init_memblock __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, unsigned long *out_end_pfn, int *out_nid) { struct memblock_type *type = &memblock.memory; struct memblock_region *r; |
d622abf74 mm: memblock: rep... |
1162 |
int r_nid; |
7c0caeb86 memblock: Add opt... |
1163 1164 1165 |
while (++*idx < type->cnt) { r = &type->regions[*idx]; |
d622abf74 mm: memblock: rep... |
1166 |
r_nid = memblock_get_region_node(r); |
7c0caeb86 memblock: Add opt... |
1167 1168 1169 |
if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) continue; |
d622abf74 mm: memblock: rep... |
1170 |
if (nid == MAX_NUMNODES || nid == r_nid) |
7c0caeb86 memblock: Add opt... |
1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 |
break; } if (*idx >= type->cnt) { *idx = -1; return; } if (out_start_pfn) *out_start_pfn = PFN_UP(r->base); if (out_end_pfn) *out_end_pfn = PFN_DOWN(r->base + r->size); if (out_nid) |
d622abf74 mm: memblock: rep... |
1183 |
*out_nid = r_nid; |
7c0caeb86 memblock: Add opt... |
1184 1185 1186 1187 1188 1189 |
} /** * memblock_set_node - set node ID on memblock regions * @base: base of area to set node ID for * @size: size of area to set node ID for |
e7e8de591 memblock: make me... |
1190 |
* @type: memblock type to set node ID for |
7c0caeb86 memblock: Add opt... |
1191 1192 |
* @nid: node ID to set * |
47cec4432 docs/mm: memblock... |
1193 |
* Set the nid of memblock @type regions in [@base, @base + @size) to @nid. |
7c0caeb86 memblock: Add opt... |
1194 1195 |
* Regions which cross the area boundaries are split as necessary. * |
47cec4432 docs/mm: memblock... |
1196 |
* Return: |
7c0caeb86 memblock: Add opt... |
1197 1198 1199 |
* 0 on success, -errno on failure. */ int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, |
e7e8de591 memblock: make me... |
1200 |
struct memblock_type *type, int nid) |
7c0caeb86 memblock: Add opt... |
1201 |
{ |
3f08a302f mm: remove CONFIG... |
1202 |
#ifdef CONFIG_NEED_MULTIPLE_NODES |
6a9ceb31c memblock: Separat... |
1203 1204 |
int start_rgn, end_rgn; int i, ret; |
7c0caeb86 memblock: Add opt... |
1205 |
|
6a9ceb31c memblock: Separat... |
1206 1207 1208 |
ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); if (ret) return ret; |
7c0caeb86 memblock: Add opt... |
1209 |
|
6a9ceb31c memblock: Separat... |
1210 |
for (i = start_rgn; i < end_rgn; i++) |
e9d24ad30 mm/memblock: use ... |
1211 |
memblock_set_region_node(&type->regions[i], nid); |
7c0caeb86 memblock: Add opt... |
1212 1213 |
memblock_merge_regions(type); |
3f08a302f mm: remove CONFIG... |
1214 |
#endif |
7c0caeb86 memblock: Add opt... |
1215 1216 |
return 0; } |
3f08a302f mm: remove CONFIG... |
1217 |
|
837566e7e mm: implement new... |
1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 |
#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT /** * __next_mem_pfn_range_in_zone - iterator for for_each_*_range_in_zone() * * @idx: pointer to u64 loop variable * @zone: zone in which all of the memory blocks reside * @out_spfn: ptr to ulong for start pfn of the range, can be %NULL * @out_epfn: ptr to ulong for end pfn of the range, can be %NULL * * This function is meant to be a zone/pfn specific wrapper for the * for_each_mem_range type iterators. Specifically they are used in the * deferred memory init routines and as such we were duplicating much of * this logic throughout the code. So instead of having it in multiple * locations it seemed like it would make more sense to centralize this to * one new iterator that does everything they need. */ void __init_memblock __next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone, unsigned long *out_spfn, unsigned long *out_epfn) { int zone_nid = zone_to_nid(zone); phys_addr_t spa, epa; int nid; __next_mem_range(idx, zone_nid, MEMBLOCK_NONE, &memblock.memory, &memblock.reserved, &spa, &epa, &nid); while (*idx != U64_MAX) { unsigned long epfn = PFN_DOWN(epa); unsigned long spfn = PFN_UP(spa); /* * Verify the end is at least past the start of the zone and * that we have at least one PFN to initialize. */ if (zone->zone_start_pfn < epfn && spfn < epfn) { /* if we went too far just stop searching */ if (zone_end_pfn(zone) <= spfn) { *idx = U64_MAX; break; } if (out_spfn) *out_spfn = max(zone->zone_start_pfn, spfn); if (out_epfn) *out_epfn = min(zone_end_pfn(zone), epfn); return; } __next_mem_range(idx, zone_nid, MEMBLOCK_NONE, &memblock.memory, &memblock.reserved, &spa, &epa, &nid); } /* signal end of iteration */ if (out_spfn) *out_spfn = ULONG_MAX; if (out_epfn) *out_epfn = 0; } #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */ |
7c0caeb86 memblock: Add opt... |
1282 |
|
92d12f954 memblock: refacto... |
1283 1284 1285 1286 1287 1288 1289 |
/** * memblock_alloc_range_nid - allocate boot memory block * @size: size of memory block to be allocated in bytes * @align: alignment of the region and block's size * @start: the lower bound of the memory region to allocate (phys address) * @end: the upper bound of the memory region to allocate (phys address) * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
0ac398b17 mm: support membl... |
1290 |
* @exact_nid: control the allocation fall back to other nodes |
92d12f954 memblock: refacto... |
1291 1292 |
* * The allocation is performed from memory region limited by |
95830666b mm/memblock: corr... |
1293 |
* memblock.current_limit if @end == %MEMBLOCK_ALLOC_ACCESSIBLE. |
92d12f954 memblock: refacto... |
1294 |
* |
0ac398b17 mm: support membl... |
1295 1296 |
* If the specified node can not hold the requested memory and @exact_nid * is false, the allocation falls back to any node in the system. |
92d12f954 memblock: refacto... |
1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 |
* * For systems with memory mirroring, the allocation is attempted first * from the regions with mirroring enabled and then retried from any * memory region. * * In addition, function sets the min_count to 0 using kmemleak_alloc_phys for * allocated boot memory block, so that it is never reported as leaks. * * Return: * Physical address of allocated memory block on success, %0 on failure. */ |
8676af1ff mm: cma: NUMA nod... |
1308 |
phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size, |
2bfc2862c memblock: introdu... |
1309 |
phys_addr_t align, phys_addr_t start, |
0ac398b17 mm: support membl... |
1310 1311 |
phys_addr_t end, int nid, bool exact_nid) |
95f72d1ed lmb: rename to me... |
1312 |
{ |
92d12f954 memblock: refacto... |
1313 |
enum memblock_flags flags = choose_memblock_flags(); |
6ed311b28 memblock: Move fu... |
1314 |
phys_addr_t found; |
95f72d1ed lmb: rename to me... |
1315 |
|
92d12f954 memblock: refacto... |
1316 1317 1318 |
if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead ")) nid = NUMA_NO_NODE; |
2f770806f mm/memblock.c: wa... |
1319 1320 1321 1322 1323 |
if (!align) { /* Can't use WARNs this early in boot on powerpc */ dump_stack(); align = SMP_CACHE_BYTES; } |
92d12f954 memblock: refacto... |
1324 |
again: |
fc6daaf93 mm/memblock: add ... |
1325 1326 |
found = memblock_find_in_range_node(size, align, start, end, nid, flags); |
92d12f954 memblock: refacto... |
1327 1328 |
if (found && !memblock_reserve(found, size)) goto done; |
0ac398b17 mm: support membl... |
1329 |
if (nid != NUMA_NO_NODE && !exact_nid) { |
92d12f954 memblock: refacto... |
1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 |
found = memblock_find_in_range_node(size, align, start, end, NUMA_NO_NODE, flags); if (found && !memblock_reserve(found, size)) goto done; } if (flags & MEMBLOCK_MIRROR) { flags &= ~MEMBLOCK_MIRROR; pr_warn("Could not allocate %pap bytes of mirrored memory ", &size); goto again; } return 0; done: /* Skip kmemleak for kasan_init() due to high volume. */ if (end != MEMBLOCK_ALLOC_KASAN) |
aedf95ea0 mm/memblock.c: ca... |
1350 |
/* |
92d12f954 memblock: refacto... |
1351 1352 1353 1354 |
* The min_count is set to 0 so that memblock allocated * blocks are never reported as leaks. This is because many * of these blocks are only referred via the physical * address which is not looked up by kmemleak. |
aedf95ea0 mm/memblock.c: ca... |
1355 |
*/ |
9099daed9 mm: kmemleak: avo... |
1356 |
kmemleak_alloc_phys(found, size, 0, 0); |
92d12f954 memblock: refacto... |
1357 1358 |
return found; |
95f72d1ed lmb: rename to me... |
1359 |
} |
a2974133b mm: memblock: upd... |
1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 |
/** * memblock_phys_alloc_range - allocate a memory block inside specified range * @size: size of memory block to be allocated in bytes * @align: alignment of the region and block's size * @start: the lower bound of the memory region to allocate (physical address) * @end: the upper bound of the memory region to allocate (physical address) * * Allocate @size bytes in the between @start and @end. * * Return: physical address of the allocated memory block on success, * %0 on failure. */ |
8a770c2a8 memblock: emphasi... |
1372 1373 1374 1375 |
phys_addr_t __init memblock_phys_alloc_range(phys_addr_t size, phys_addr_t align, phys_addr_t start, phys_addr_t end) |
2bfc2862c memblock: introdu... |
1376 |
{ |
0ac398b17 mm: support membl... |
1377 1378 |
return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE, false); |
7bd0b0f0d memblock: Reimple... |
1379 |
} |
a2974133b mm: memblock: upd... |
1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 |
/** * memblock_phys_alloc_try_nid - allocate a memory block from specified MUMA node * @size: size of memory block to be allocated in bytes * @align: alignment of the region and block's size * @nid: nid of the free area to find, %NUMA_NO_NODE for any node * * Allocates memory block from the specified NUMA node. If the node * has no available memory, attempts to allocated from any node in the * system. * * Return: physical address of the allocated memory block on success, * %0 on failure. */ |
9a8dd708d memblock: rename ... |
1393 |
phys_addr_t __init memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid) |
9d1e24928 memblock: Separat... |
1394 |
{ |
337555744 memblock: membloc... |
1395 |
return memblock_alloc_range_nid(size, align, 0, |
0ac398b17 mm: support membl... |
1396 |
MEMBLOCK_ALLOC_ACCESSIBLE, nid, false); |
95f72d1ed lmb: rename to me... |
1397 |
} |
26f09e9b3 mm/memblock: add ... |
1398 |
/** |
eb31d559f memblock: remove ... |
1399 |
* memblock_alloc_internal - allocate boot memory block |
26f09e9b3 mm/memblock: add ... |
1400 1401 1402 1403 1404 |
* @size: size of memory block to be allocated in bytes * @align: alignment of the region and block's size * @min_addr: the lower bound of the memory region to allocate (phys address) * @max_addr: the upper bound of the memory region to allocate (phys address) * @nid: nid of the free area to find, %NUMA_NO_NODE for any node |
0ac398b17 mm: support membl... |
1405 |
* @exact_nid: control the allocation fall back to other nodes |
26f09e9b3 mm/memblock: add ... |
1406 |
* |
92d12f954 memblock: refacto... |
1407 1408 |
* Allocates memory block using memblock_alloc_range_nid() and * converts the returned physical address to virtual. |
26f09e9b3 mm/memblock: add ... |
1409 |
* |
92d12f954 memblock: refacto... |
1410 1411 1412 1413 |
* The @min_addr limit is dropped if it can not be satisfied and the allocation * will fall back to memory below @min_addr. Other constraints, such * as node and mirrored memory will be handled again in * memblock_alloc_range_nid(). |
26f09e9b3 mm/memblock: add ... |
1414 |
* |
47cec4432 docs/mm: memblock... |
1415 |
* Return: |
26f09e9b3 mm/memblock: add ... |
1416 1417 |
* Virtual address of allocated memory block on success, NULL on failure. */ |
eb31d559f memblock: remove ... |
1418 |
static void * __init memblock_alloc_internal( |
26f09e9b3 mm/memblock: add ... |
1419 1420 |
phys_addr_t size, phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, |
0ac398b17 mm: support membl... |
1421 |
int nid, bool exact_nid) |
26f09e9b3 mm/memblock: add ... |
1422 1423 |
{ phys_addr_t alloc; |
26f09e9b3 mm/memblock: add ... |
1424 1425 1426 1427 |
/* * Detect any accidental use of these APIs after slab is ready, as at * this moment memblock may be deinitialized already and its |
c6ffc5ca8 memblock: rename ... |
1428 |
* internal data may be destroyed (after execution of memblock_free_all) |
26f09e9b3 mm/memblock: add ... |
1429 1430 1431 |
*/ if (WARN_ON_ONCE(slab_is_available())) return kzalloc_node(size, GFP_NOWAIT, nid); |
f3057ad76 mm: memblock: do ... |
1432 1433 |
if (max_addr > memblock.current_limit) max_addr = memblock.current_limit; |
0ac398b17 mm: support membl... |
1434 1435 |
alloc = memblock_alloc_range_nid(size, align, min_addr, max_addr, nid, exact_nid); |
26f09e9b3 mm/memblock: add ... |
1436 |
|
92d12f954 memblock: refacto... |
1437 1438 |
/* retry allocation without lower limit */ if (!alloc && min_addr) |
0ac398b17 mm: support membl... |
1439 1440 |
alloc = memblock_alloc_range_nid(size, align, 0, max_addr, nid, exact_nid); |
26f09e9b3 mm/memblock: add ... |
1441 |
|
92d12f954 memblock: refacto... |
1442 1443 |
if (!alloc) return NULL; |
26f09e9b3 mm/memblock: add ... |
1444 |
|
92d12f954 memblock: refacto... |
1445 |
return phys_to_virt(alloc); |
26f09e9b3 mm/memblock: add ... |
1446 1447 1448 |
} /** |
0ac398b17 mm: support membl... |
1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 |
* memblock_alloc_exact_nid_raw - allocate boot memory block on the exact node * without zeroing memory * @size: size of memory block to be allocated in bytes * @align: alignment of the region and block's size * @min_addr: the lower bound of the memory region from where the allocation * is preferred (phys address) * @max_addr: the upper bound of the memory region from where the allocation * is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to * allocate only from memory limited by memblock.current_limit value * @nid: nid of the free area to find, %NUMA_NO_NODE for any node * * Public function, provides additional debug information (including caller * info), if enabled. Does not zero allocated memory. * * Return: * Virtual address of allocated memory block on success, NULL on failure. */ void * __init memblock_alloc_exact_nid_raw( phys_addr_t size, phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid) { void *ptr; memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=%pa max_addr=%pa %pS ", __func__, (u64)size, (u64)align, nid, &min_addr, &max_addr, (void *)_RET_IP_); ptr = memblock_alloc_internal(size, align, min_addr, max_addr, nid, true); if (ptr && size > 0) page_init_poison(ptr, size); return ptr; } /** |
eb31d559f memblock: remove ... |
1487 |
* memblock_alloc_try_nid_raw - allocate boot memory block without zeroing |
ea1f5f371 mm: define memblo... |
1488 1489 1490 1491 1492 1493 |
* memory and without panicking * @size: size of memory block to be allocated in bytes * @align: alignment of the region and block's size * @min_addr: the lower bound of the memory region from where the allocation * is preferred (phys address) * @max_addr: the upper bound of the memory region from where the allocation |
97ad1087e memblock: replace... |
1494 |
* is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to |
ea1f5f371 mm: define memblo... |
1495 1496 1497 1498 1499 1500 1501 |
* allocate only from memory limited by memblock.current_limit value * @nid: nid of the free area to find, %NUMA_NO_NODE for any node * * Public function, provides additional debug information (including caller * info), if enabled. Does not zero allocated memory, does not panic if request * cannot be satisfied. * |
47cec4432 docs/mm: memblock... |
1502 |
* Return: |
ea1f5f371 mm: define memblo... |
1503 1504 |
* Virtual address of allocated memory block on success, NULL on failure. */ |
eb31d559f memblock: remove ... |
1505 |
void * __init memblock_alloc_try_nid_raw( |
ea1f5f371 mm: define memblo... |
1506 1507 1508 1509 1510 |
phys_addr_t size, phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid) { void *ptr; |
d75f773c8 treewide: Switch ... |
1511 1512 |
memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=%pa max_addr=%pa %pS ", |
a36aab890 mm/memblock.c: re... |
1513 1514 |
__func__, (u64)size, (u64)align, nid, &min_addr, &max_addr, (void *)_RET_IP_); |
ea1f5f371 mm: define memblo... |
1515 |
|
eb31d559f memblock: remove ... |
1516 |
ptr = memblock_alloc_internal(size, align, |
0ac398b17 mm: support membl... |
1517 |
min_addr, max_addr, nid, false); |
ea1f5f371 mm: define memblo... |
1518 |
if (ptr && size > 0) |
f682a97a0 mm: provide kerne... |
1519 |
page_init_poison(ptr, size); |
ea1f5f371 mm: define memblo... |
1520 1521 1522 1523 |
return ptr; } /** |
c0dbe825a memblock: membloc... |
1524 |
* memblock_alloc_try_nid - allocate boot memory block |
26f09e9b3 mm/memblock: add ... |
1525 1526 1527 1528 1529 |
* @size: size of memory block to be allocated in bytes * @align: alignment of the region and block's size * @min_addr: the lower bound of the memory region from where the allocation * is preferred (phys address) * @max_addr: the upper bound of the memory region from where the allocation |
97ad1087e memblock: replace... |
1530 |
* is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to |
26f09e9b3 mm/memblock: add ... |
1531 1532 1533 |
* allocate only from memory limited by memblock.current_limit value * @nid: nid of the free area to find, %NUMA_NO_NODE for any node * |
c0dbe825a memblock: membloc... |
1534 1535 |
* Public function, provides additional debug information (including caller * info), if enabled. This function zeroes the allocated memory. |
26f09e9b3 mm/memblock: add ... |
1536 |
* |
47cec4432 docs/mm: memblock... |
1537 |
* Return: |
26f09e9b3 mm/memblock: add ... |
1538 1539 |
* Virtual address of allocated memory block on success, NULL on failure. */ |
eb31d559f memblock: remove ... |
1540 |
void * __init memblock_alloc_try_nid( |
26f09e9b3 mm/memblock: add ... |
1541 1542 1543 1544 1545 |
phys_addr_t size, phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid) { void *ptr; |
d75f773c8 treewide: Switch ... |
1546 1547 |
memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=%pa max_addr=%pa %pS ", |
a36aab890 mm/memblock.c: re... |
1548 1549 |
__func__, (u64)size, (u64)align, nid, &min_addr, &max_addr, (void *)_RET_IP_); |
eb31d559f memblock: remove ... |
1550 |
ptr = memblock_alloc_internal(size, align, |
0ac398b17 mm: support membl... |
1551 |
min_addr, max_addr, nid, false); |
c0dbe825a memblock: membloc... |
1552 |
if (ptr) |
ea1f5f371 mm: define memblo... |
1553 |
memset(ptr, 0, size); |
26f09e9b3 mm/memblock: add ... |
1554 |
|
c0dbe825a memblock: membloc... |
1555 |
return ptr; |
26f09e9b3 mm/memblock: add ... |
1556 1557 1558 |
} /** |
a2974133b mm: memblock: upd... |
1559 |
* __memblock_free_late - free pages directly to buddy allocator |
48a833cc7 docs/mm: memblock... |
1560 |
* @base: phys starting address of the boot memory block |
26f09e9b3 mm/memblock: add ... |
1561 1562 |
* @size: size of the boot memory block in bytes * |
a2974133b mm: memblock: upd... |
1563 |
* This is only useful when the memblock allocator has already been torn |
26f09e9b3 mm/memblock: add ... |
1564 |
* down, but we are still initializing the system. Pages are released directly |
a2974133b mm: memblock: upd... |
1565 |
* to the buddy allocator. |
26f09e9b3 mm/memblock: add ... |
1566 1567 1568 |
*/ void __init __memblock_free_late(phys_addr_t base, phys_addr_t size) { |
a36aab890 mm/memblock.c: re... |
1569 |
phys_addr_t cursor, end; |
26f09e9b3 mm/memblock: add ... |
1570 |
|
a36aab890 mm/memblock.c: re... |
1571 |
end = base + size - 1; |
d75f773c8 treewide: Switch ... |
1572 1573 |
memblock_dbg("%s: [%pa-%pa] %pS ", |
a36aab890 mm/memblock.c: re... |
1574 |
__func__, &base, &end, (void *)_RET_IP_); |
9099daed9 mm: kmemleak: avo... |
1575 |
kmemleak_free_part_phys(base, size); |
26f09e9b3 mm/memblock: add ... |
1576 1577 1578 1579 |
cursor = PFN_UP(base); end = PFN_DOWN(base + size); for (; cursor < end; cursor++) { |
7c2ee349c memblock: rename ... |
1580 |
memblock_free_pages(pfn_to_page(cursor), cursor, 0); |
ca79b0c21 mm: convert total... |
1581 |
totalram_pages_inc(); |
26f09e9b3 mm/memblock: add ... |
1582 1583 |
} } |
9d1e24928 memblock: Separat... |
1584 1585 1586 1587 |
/* * Remaining API functions */ |
1f1ffb8a1 memblock: don't m... |
1588 |
phys_addr_t __init_memblock memblock_phys_mem_size(void) |
95f72d1ed lmb: rename to me... |
1589 |
{ |
1440c4e2c memblock: Track t... |
1590 |
return memblock.memory.total_size; |
95f72d1ed lmb: rename to me... |
1591 |
} |
8907de5dc mm/memblock.c: ex... |
1592 1593 1594 1595 |
phys_addr_t __init_memblock memblock_reserved_size(void) { return memblock.reserved.total_size; } |
0a93ebef6 memblock: add mem... |
1596 1597 1598 1599 1600 |
/* lowest address */ phys_addr_t __init_memblock memblock_start_of_DRAM(void) { return memblock.memory.regions[0].base; } |
10d064398 memblock: Option ... |
1601 |
phys_addr_t __init_memblock memblock_end_of_DRAM(void) |
95f72d1ed lmb: rename to me... |
1602 1603 |
{ int idx = memblock.memory.cnt - 1; |
e3239ff92 memblock: Rename ... |
1604 |
return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); |
95f72d1ed lmb: rename to me... |
1605 |
} |
6be666e94 ANDROID: mm/membl... |
1606 |
EXPORT_SYMBOL_GPL(memblock_end_of_DRAM); |
95f72d1ed lmb: rename to me... |
1607 |
|
a571d4eb5 mm/memblock.c: ad... |
1608 |
static phys_addr_t __init_memblock __find_max_addr(phys_addr_t limit) |
95f72d1ed lmb: rename to me... |
1609 |
{ |
1c4bc43dd mm/memblock: intr... |
1610 |
phys_addr_t max_addr = PHYS_ADDR_MAX; |
136199f0a memblock: use for... |
1611 |
struct memblock_region *r; |
95f72d1ed lmb: rename to me... |
1612 |
|
a571d4eb5 mm/memblock.c: ad... |
1613 1614 1615 |
/* * translate the memory @limit size into the max address within one of * the memory memblock regions, if the @limit exceeds the total size |
1c4bc43dd mm/memblock: intr... |
1616 |
* of those regions, max_addr will keep original value PHYS_ADDR_MAX |
a571d4eb5 mm/memblock.c: ad... |
1617 |
*/ |
cc6de1680 memblock: use sep... |
1618 |
for_each_mem_region(r) { |
c0ce8fef5 memblock: Reimple... |
1619 1620 1621 |
if (limit <= r->size) { max_addr = r->base + limit; break; |
95f72d1ed lmb: rename to me... |
1622 |
} |
c0ce8fef5 memblock: Reimple... |
1623 |
limit -= r->size; |
95f72d1ed lmb: rename to me... |
1624 |
} |
c0ce8fef5 memblock: Reimple... |
1625 |
|
a571d4eb5 mm/memblock.c: ad... |
1626 1627 1628 1629 1630 |
return max_addr; } void __init memblock_enforce_memory_limit(phys_addr_t limit) { |
49aef7175 mm/memblock.c: re... |
1631 |
phys_addr_t max_addr; |
a571d4eb5 mm/memblock.c: ad... |
1632 1633 1634 1635 1636 1637 1638 |
if (!limit) return; max_addr = __find_max_addr(limit); /* @limit exceeds the total size of the memory, do nothing */ |
1c4bc43dd mm/memblock: intr... |
1639 |
if (max_addr == PHYS_ADDR_MAX) |
a571d4eb5 mm/memblock.c: ad... |
1640 |
return; |
c0ce8fef5 memblock: Reimple... |
1641 |
/* truncate both memory and reserved regions */ |
f1af9d3af mm/memblock: Do s... |
1642 |
memblock_remove_range(&memblock.memory, max_addr, |
1c4bc43dd mm/memblock: intr... |
1643 |
PHYS_ADDR_MAX); |
f1af9d3af mm/memblock: Do s... |
1644 |
memblock_remove_range(&memblock.reserved, max_addr, |
1c4bc43dd mm/memblock: intr... |
1645 |
PHYS_ADDR_MAX); |
95f72d1ed lmb: rename to me... |
1646 |
} |
c9ca9b4e2 memblock: add mem... |
1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 |
void __init memblock_cap_memory_range(phys_addr_t base, phys_addr_t size) { int start_rgn, end_rgn; int i, ret; if (!size) return; ret = memblock_isolate_range(&memblock.memory, base, size, &start_rgn, &end_rgn); if (ret) return; /* remove all the MAP regions */ for (i = memblock.memory.cnt - 1; i >= end_rgn; i--) if (!memblock_is_nomap(&memblock.memory.regions[i])) memblock_remove_region(&memblock.memory, i); for (i = start_rgn - 1; i >= 0; i--) if (!memblock_is_nomap(&memblock.memory.regions[i])) memblock_remove_region(&memblock.memory, i); /* truncate the reserved regions */ memblock_remove_range(&memblock.reserved, 0, base); memblock_remove_range(&memblock.reserved, |
1c4bc43dd mm/memblock: intr... |
1672 |
base + size, PHYS_ADDR_MAX); |
c9ca9b4e2 memblock: add mem... |
1673 |
} |
a571d4eb5 mm/memblock.c: ad... |
1674 1675 |
void __init memblock_mem_limit_remove_map(phys_addr_t limit) { |
a571d4eb5 mm/memblock.c: ad... |
1676 |
phys_addr_t max_addr; |
a571d4eb5 mm/memblock.c: ad... |
1677 1678 1679 1680 1681 1682 1683 |
if (!limit) return; max_addr = __find_max_addr(limit); /* @limit exceeds the total size of the memory, do nothing */ |
1c4bc43dd mm/memblock: intr... |
1684 |
if (max_addr == PHYS_ADDR_MAX) |
a571d4eb5 mm/memblock.c: ad... |
1685 |
return; |
c9ca9b4e2 memblock: add mem... |
1686 |
memblock_cap_memory_range(0, max_addr); |
a571d4eb5 mm/memblock.c: ad... |
1687 |
} |
cd79481d2 memblock: Annotat... |
1688 |
static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) |
72d4b0b4e memblock: Impleme... |
1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 |
{ unsigned int left = 0, right = type->cnt; do { unsigned int mid = (right + left) / 2; if (addr < type->regions[mid].base) right = mid; else if (addr >= (type->regions[mid].base + type->regions[mid].size)) left = mid + 1; else return mid; } while (left < right); return -1; } |
f5a222dc2 memblock: annotat... |
1705 |
bool __init_memblock memblock_is_reserved(phys_addr_t addr) |
95f72d1ed lmb: rename to me... |
1706 |
{ |
72d4b0b4e memblock: Impleme... |
1707 1708 |
return memblock_search(&memblock.reserved, addr) != -1; } |
95f72d1ed lmb: rename to me... |
1709 |
|
b4ad0c7e0 mm/memblock.c: me... |
1710 |
bool __init_memblock memblock_is_memory(phys_addr_t addr) |
72d4b0b4e memblock: Impleme... |
1711 1712 1713 |
{ return memblock_search(&memblock.memory, addr) != -1; } |
937f0c267 mm/memblock: memb... |
1714 |
bool __init_memblock memblock_is_map_memory(phys_addr_t addr) |
bf3d3cc58 mm/memblock: add ... |
1715 1716 1717 1718 1719 1720 1721 |
{ int i = memblock_search(&memblock.memory, addr); if (i == -1) return false; return !memblock_is_nomap(&memblock.memory.regions[i]); } |
e76b63f80 memblock, numa: b... |
1722 1723 1724 1725 |
int __init_memblock memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn, unsigned long *end_pfn) { struct memblock_type *type = &memblock.memory; |
167632303 mm/memblock.c: us... |
1726 |
int mid = memblock_search(type, PFN_PHYS(pfn)); |
e76b63f80 memblock, numa: b... |
1727 1728 1729 |
if (mid == -1) return -1; |
f7e2f7e89 mm/memblock.c: us... |
1730 1731 |
*start_pfn = PFN_DOWN(type->regions[mid].base); *end_pfn = PFN_DOWN(type->regions[mid].base + type->regions[mid].size); |
e76b63f80 memblock, numa: b... |
1732 |
|
d622abf74 mm: memblock: rep... |
1733 |
return memblock_get_region_node(&type->regions[mid]); |
e76b63f80 memblock, numa: b... |
1734 |
} |
e76b63f80 memblock, numa: b... |
1735 |
|
eab309494 memblock: Documen... |
1736 1737 1738 1739 1740 |
/** * memblock_is_region_memory - check if a region is a subset of memory * @base: base of region to check * @size: size of region to check * |
47cec4432 docs/mm: memblock... |
1741 |
* Check if the region [@base, @base + @size) is a subset of a memory block. |
eab309494 memblock: Documen... |
1742 |
* |
47cec4432 docs/mm: memblock... |
1743 |
* Return: |
eab309494 memblock: Documen... |
1744 1745 |
* 0 if false, non-zero if true */ |
937f0c267 mm/memblock: memb... |
1746 |
bool __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size) |
72d4b0b4e memblock: Impleme... |
1747 |
{ |
abb65272a memblock: fix mem... |
1748 |
int idx = memblock_search(&memblock.memory, base); |
eb18f1b5b memblock: Make me... |
1749 |
phys_addr_t end = base + memblock_cap_size(base, &size); |
72d4b0b4e memblock: Impleme... |
1750 1751 |
if (idx == -1) |
937f0c267 mm/memblock: memb... |
1752 |
return false; |
ef415ef41 mm/memblock.c: tr... |
1753 |
return (memblock.memory.regions[idx].base + |
eb18f1b5b memblock: Make me... |
1754 |
memblock.memory.regions[idx].size) >= end; |
95f72d1ed lmb: rename to me... |
1755 |
} |
eab309494 memblock: Documen... |
1756 1757 1758 1759 1760 |
/** * memblock_is_region_reserved - check if a region intersects reserved memory * @base: base of region to check * @size: size of region to check * |
47cec4432 docs/mm: memblock... |
1761 1762 |
* Check if the region [@base, @base + @size) intersects a reserved * memory block. |
eab309494 memblock: Documen... |
1763 |
* |
47cec4432 docs/mm: memblock... |
1764 |
* Return: |
c5c5c9d10 mm/memblock.c: ma... |
1765 |
* True if they intersect, false if not. |
eab309494 memblock: Documen... |
1766 |
*/ |
c5c5c9d10 mm/memblock.c: ma... |
1767 |
bool __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) |
95f72d1ed lmb: rename to me... |
1768 |
{ |
eb18f1b5b memblock: Make me... |
1769 |
memblock_cap_size(base, &size); |
c5c5c9d10 mm/memblock.c: ma... |
1770 |
return memblock_overlaps_region(&memblock.reserved, base, size); |
95f72d1ed lmb: rename to me... |
1771 |
} |
6ede1fd3c x86, mm: Trim mem... |
1772 1773 |
void __init_memblock memblock_trim_memory(phys_addr_t align) { |
6ede1fd3c x86, mm: Trim mem... |
1774 |
phys_addr_t start, end, orig_start, orig_end; |
136199f0a memblock: use for... |
1775 |
struct memblock_region *r; |
6ede1fd3c x86, mm: Trim mem... |
1776 |
|
cc6de1680 memblock: use sep... |
1777 |
for_each_mem_region(r) { |
136199f0a memblock: use for... |
1778 1779 |
orig_start = r->base; orig_end = r->base + r->size; |
6ede1fd3c x86, mm: Trim mem... |
1780 1781 1782 1783 1784 1785 1786 |
start = round_up(orig_start, align); end = round_down(orig_end, align); if (start == orig_start && end == orig_end) continue; if (start < end) { |
136199f0a memblock: use for... |
1787 1788 |
r->base = start; r->size = end - start; |
6ede1fd3c x86, mm: Trim mem... |
1789 |
} else { |
136199f0a memblock: use for... |
1790 1791 1792 |
memblock_remove_region(&memblock.memory, r - memblock.memory.regions); r--; |
6ede1fd3c x86, mm: Trim mem... |
1793 1794 1795 |
} } } |
e63075a3c memblock: Introdu... |
1796 |
|
3661ca66a memblock: Fix sec... |
1797 |
void __init_memblock memblock_set_current_limit(phys_addr_t limit) |
e63075a3c memblock: Introdu... |
1798 1799 1800 |
{ memblock.current_limit = limit; } |
fec510141 ARM: 7993/1: mm/m... |
1801 1802 1803 1804 |
phys_addr_t __init_memblock memblock_get_current_limit(void) { return memblock.current_limit; } |
0262d9c84 memblock: embed m... |
1805 |
static void __init_memblock memblock_dump(struct memblock_type *type) |
6ed311b28 memblock: Move fu... |
1806 |
{ |
5d63f81c9 mm/memblock.c: re... |
1807 |
phys_addr_t base, end, size; |
e1720fee2 mm/memblock: add ... |
1808 |
enum memblock_flags flags; |
8c9c1701c mm/memblock: intr... |
1809 1810 |
int idx; struct memblock_region *rgn; |
6ed311b28 memblock: Move fu... |
1811 |
|
0262d9c84 memblock: embed m... |
1812 1813 |
pr_info(" %s.cnt = 0x%lx ", type->name, type->cnt); |
6ed311b28 memblock: Move fu... |
1814 |
|
66e8b438b mm/memblock.c: ma... |
1815 |
for_each_memblock_type(idx, type, rgn) { |
7c0caeb86 memblock: Add opt... |
1816 1817 1818 1819 |
char nid_buf[32] = ""; base = rgn->base; size = rgn->size; |
5d63f81c9 mm/memblock.c: re... |
1820 |
end = base + size - 1; |
66a207572 memblock, numa: i... |
1821 |
flags = rgn->flags; |
3f08a302f mm: remove CONFIG... |
1822 |
#ifdef CONFIG_NEED_MULTIPLE_NODES |
7c0caeb86 memblock: Add opt... |
1823 1824 1825 1826 |
if (memblock_get_region_node(rgn) != MAX_NUMNODES) snprintf(nid_buf, sizeof(nid_buf), " on node %d", memblock_get_region_node(rgn)); #endif |
e1720fee2 mm/memblock: add ... |
1827 1828 |
pr_info(" %s[%#x]\t[%pa-%pa], %pa bytes%s flags: %#x ", |
0262d9c84 memblock: embed m... |
1829 |
type->name, idx, &base, &end, &size, nid_buf, flags); |
6ed311b28 memblock: Move fu... |
1830 1831 |
} } |
87c55870f memblock: make me... |
1832 |
static void __init_memblock __memblock_dump_all(void) |
6ed311b28 memblock: Move fu... |
1833 |
{ |
6ed311b28 memblock: Move fu... |
1834 1835 |
pr_info("MEMBLOCK configuration: "); |
5d63f81c9 mm/memblock.c: re... |
1836 1837 1838 1839 |
pr_info(" memory size = %pa reserved size = %pa ", &memblock.memory.total_size, &memblock.reserved.total_size); |
6ed311b28 memblock: Move fu... |
1840 |
|
0262d9c84 memblock: embed m... |
1841 1842 |
memblock_dump(&memblock.memory); memblock_dump(&memblock.reserved); |
409efd4c9 memblock: also du... |
1843 |
#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
776499058 mm/memblock: expo... |
1844 |
memblock_dump(&physmem); |
409efd4c9 memblock: also du... |
1845 |
#endif |
6ed311b28 memblock: Move fu... |
1846 |
} |
87c55870f memblock: make me... |
1847 1848 1849 1850 1851 |
void __init_memblock memblock_dump_all(void) { if (memblock_debug) __memblock_dump_all(); } |
1aadc0560 memblock: s/membl... |
1852 |
void __init memblock_allow_resize(void) |
6ed311b28 memblock: Move fu... |
1853 |
{ |
142b45a72 memblock: Add arr... |
1854 |
memblock_can_resize = 1; |
6ed311b28 memblock: Move fu... |
1855 |
} |
6ed311b28 memblock: Move fu... |
1856 1857 1858 1859 1860 1861 1862 |
static int __init early_memblock(char *p) { if (p && strstr(p, "debug")) memblock_debug = 1; return 0; } early_param("memblock", early_memblock); |
bda49a811 mm: remove nobootmem |
1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 |
static void __init __free_pages_memory(unsigned long start, unsigned long end) { int order; while (start < end) { order = min(MAX_ORDER - 1UL, __ffs(start)); while (start + (1UL << order) > end) order--; memblock_free_pages(pfn_to_page(start), start, order); start += (1UL << order); } } static unsigned long __init __free_memory_core(phys_addr_t start, phys_addr_t end) { unsigned long start_pfn = PFN_UP(start); unsigned long end_pfn = min_t(unsigned long, PFN_DOWN(end), max_low_pfn); if (start_pfn >= end_pfn) return 0; __free_pages_memory(start_pfn, end_pfn); return end_pfn - start_pfn; } static unsigned long __init free_low_memory_core_early(void) { unsigned long count = 0; phys_addr_t start, end; u64 i; memblock_clear_hotplug(0, -1); |
9f3d5eaa3 memblock: impleme... |
1901 |
for_each_reserved_mem_range(i, &start, &end) |
bda49a811 mm: remove nobootmem |
1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 |
reserve_bootmem_region(start, end); /* * We need to use NUMA_NO_NODE instead of NODE_DATA(0)->node_id * because in some case like Node0 doesn't have RAM installed * low ram will be on Node1 */ for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) count += __free_memory_core(start, end); return count; } static int reset_managed_pages_done __initdata; void reset_node_managed_pages(pg_data_t *pgdat) { struct zone *z; for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++) |
9705bea5f mm: convert zone-... |
1923 |
atomic_long_set(&z->managed_pages, 0); |
bda49a811 mm: remove nobootmem |
1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 |
} void __init reset_all_zones_managed_pages(void) { struct pglist_data *pgdat; if (reset_managed_pages_done) return; for_each_online_pgdat(pgdat) reset_node_managed_pages(pgdat); reset_managed_pages_done = 1; } /** * memblock_free_all - release free pages to the buddy allocator * * Return: the number of pages actually released. */ unsigned long __init memblock_free_all(void) { unsigned long pages; reset_all_zones_managed_pages(); pages = free_low_memory_core_early(); |
ca79b0c21 mm: convert total... |
1951 |
totalram_pages_add(pages); |
bda49a811 mm: remove nobootmem |
1952 1953 1954 |
return pages; } |
350e88bad mm: memblock: mak... |
1955 |
#if defined(CONFIG_DEBUG_FS) && defined(CONFIG_ARCH_KEEP_MEMBLOCK) |
6d03b885f memblock: Add deb... |
1956 1957 1958 1959 1960 1961 |
static int memblock_debug_show(struct seq_file *m, void *private) { struct memblock_type *type = m->private; struct memblock_region *reg; int i; |
5d63f81c9 mm/memblock.c: re... |
1962 |
phys_addr_t end; |
6d03b885f memblock: Add deb... |
1963 1964 1965 |
for (i = 0; i < type->cnt; i++) { reg = &type->regions[i]; |
5d63f81c9 mm/memblock.c: re... |
1966 |
end = reg->base + reg->size - 1; |
6d03b885f memblock: Add deb... |
1967 |
|
5d63f81c9 mm/memblock.c: re... |
1968 1969 1970 |
seq_printf(m, "%4d: ", i); seq_printf(m, "%pa..%pa ", ®->base, &end); |
6d03b885f memblock: Add deb... |
1971 1972 1973 |
} return 0; } |
5ad350936 mm: reuse DEFINE_... |
1974 |
DEFINE_SHOW_ATTRIBUTE(memblock_debug); |
6d03b885f memblock: Add deb... |
1975 1976 1977 1978 |
static int __init memblock_init_debugfs(void) { struct dentry *root = debugfs_create_dir("memblock", NULL); |
d9f7979c9 mm: no need to ch... |
1979 |
|
0825a6f98 mm: use octal not... |
1980 1981 1982 1983 |
debugfs_create_file("memory", 0444, root, &memblock.memory, &memblock_debug_fops); debugfs_create_file("reserved", 0444, root, &memblock.reserved, &memblock_debug_fops); |
70210ed95 mm/memblock: add ... |
1984 |
#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
776499058 mm/memblock: expo... |
1985 1986 |
debugfs_create_file("physmem", 0444, root, &physmem, &memblock_debug_fops); |
70210ed95 mm/memblock: add ... |
1987 |
#endif |
6d03b885f memblock: Add deb... |
1988 1989 1990 1991 1992 1993 |
return 0; } __initcall(memblock_init_debugfs); #endif /* CONFIG_DEBUG_FS */ |