cregit-Linux how code gets into the kernel

Release 4.13 mm/memblock.c

Directory: mm
/*
 * Procedures for maintaining information about logical memory blocks.
 *
 * Peter Bergner, IBM Corp.     June 2001.
 * Copyright (C) 2001 Peter Bergner.
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/poison.h>
#include <linux/pfn.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/memblock.h>

#include <asm/sections.h>
#include <linux/io.h>

#include "internal.h"


static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock;

static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock;
#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP

static struct memblock_region memblock_physmem_init_regions[INIT_PHYSMEM_REGIONS] __initdata_memblock;
#endif


struct memblock memblock __initdata_memblock = {
	.memory.regions		= memblock_memory_init_regions,
	.memory.cnt		= 1,	/* empty dummy entry */
	.memory.max		= INIT_MEMBLOCK_REGIONS,
	.memory.name		= "memory",

	.reserved.regions	= memblock_reserved_init_regions,
	.reserved.cnt		= 1,	/* empty dummy entry */
	.reserved.max		= INIT_MEMBLOCK_REGIONS,
	.reserved.name		= "reserved",

#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
	.physmem.regions	= memblock_physmem_init_regions,
	.physmem.cnt		= 1,	/* empty dummy entry */
	.physmem.max		= INIT_PHYSMEM_REGIONS,
	.physmem.name		= "physmem",
#endif

	.bottom_up		= false,
	.current_limit		= MEMBLOCK_ALLOC_ANYWHERE,
};


int memblock_debug __initdata_memblock;

static bool system_has_some_mirror __initdata_memblock = false;

static int memblock_can_resize __initdata_memblock;

static int memblock_memory_in_slab __initdata_memblock = 0;

static int memblock_reserved_in_slab __initdata_memblock = 0;


ulong __init_memblock choose_memblock_flags(void) { return system_has_some_mirror ? MEMBLOCK_MIRROR : MEMBLOCK_NONE; }

Contributors

PersonTokensPropCommitsCommitProp
Tony Luck15100.00%1100.00%
Total15100.00%1100.00%

/* 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) { return *size = min(*size, (phys_addr_t)ULLONG_MAX - base); }

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PersonTokensPropCommitsCommitProp
Tejun Heo31100.00%1100.00%
Total31100.00%1100.00%

/* * Address comparison utilities */
static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1, phys_addr_t base2, phys_addr_t size2) { return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); }

Contributors

PersonTokensPropCommitsCommitProp
Paul Mackerras3786.05%125.00%
Benjamin Herrenschmidt49.30%125.00%
Yinghai Lu24.65%250.00%
Total43100.00%4100.00%


bool __init_memblock memblock_overlaps_region(struct memblock_type *type, phys_addr_t base, phys_addr_t size) { unsigned long i; for (i = 0; i < type->cnt; i++) if (memblock_addrs_overlap(base, size, type->regions[i].base, type->regions[i].size)) break; return i < type->cnt; }

Contributors

PersonTokensPropCommitsCommitProp
Paul Mackerras3752.11%116.67%
Benjamin Herrenschmidt2332.39%233.33%
Alexander Kuleshov912.68%116.67%
Yinghai Lu11.41%116.67%
Tang Chen11.41%116.67%
Total71100.00%6100.00%

/* * __memblock_find_range_bottom_up - find free area utility in bottom-up * @start: start of candidate range * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} * @size: size of free area to find * @align: alignment of free area to find * @nid: nid of the free area to find, %NUMA_NO_NODE for any node * @flags: pick from blocks based on memory attributes * * Utility called from memblock_find_in_range_node(), find free area bottom-up. * * RETURNS: * 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, phys_addr_t size, phys_addr_t align, int nid, ulong flags) { phys_addr_t this_start, this_end, cand; u64 i; for_each_free_mem_range(i, nid, flags, &this_start, &this_end, NULL) { 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; }

Contributors

PersonTokensPropCommitsCommitProp
Tang Chen9595.00%150.00%
Tony Luck55.00%150.00%
Total100100.00%2100.00%

/** * __memblock_find_range_top_down - find free area utility, in top-down * @start: start of candidate range * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} * @size: size of free area to find * @align: alignment of free area to find * @nid: nid of the free area to find, %NUMA_NO_NODE for any node * @flags: pick from blocks based on memory attributes * * Utility called from memblock_find_in_range_node(), find free area top-down. * * RETURNS: * Found address on success, 0 on failure. */
static phys_addr_t __init_memblock __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end, phys_addr_t size, phys_addr_t align, int nid, ulong flags) { phys_addr_t this_start, this_end, cand; u64 i; for_each_free_mem_range_reverse(i, nid, flags, &this_start, &this_end, NULL) { 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; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Tang Chen9895.15%266.67%
Tony Luck54.85%133.33%
Total103100.00%3100.00%

/** * memblock_find_in_range_node - find free area in given range and node * @size: size of free area to find * @align: alignment of free area to find * @start: start of candidate range * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} * @nid: nid of the free area to find, %NUMA_NO_NODE for any node * @flags: pick from blocks based on memory attributes * * Find @size free area aligned to @align in the specified range and node. * * 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. * * RETURNS: * Found address on success, 0 on failure. */
phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size, phys_addr_t align, phys_addr_t start, phys_addr_t end, int nid, ulong flags) { phys_addr_t kernel_end, ret; /* pump up @end */ if (end == MEMBLOCK_ALLOC_ACCESSIBLE) end = memblock.current_limit; /* avoid allocating the first page */ start = max_t(phys_addr_t, start, PAGE_SIZE); end = max(start, end); 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, size, align, nid, flags); 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. */ WARN_ONCE(1, "memblock: bottom-up allocation failed, memory hotunplug may be affected\n"); } return __memblock_find_range_top_down(start, end, size, align, nid, flags); }

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PersonTokensPropCommitsCommitProp
Tang Chen13291.67%350.00%
Tony Luck74.86%116.67%
Grygorii Strashko42.78%116.67%
Joe Perches10.69%116.67%
Total144100.00%6100.00%

/** * memblock_find_in_range - find free area in given range * @start: start of candidate range * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE} * @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. * * RETURNS: * Found address on success, 0 on failure. */
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) { phys_addr_t ret; ulong flags = choose_memblock_flags(); 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\n", &size); flags &= ~MEMBLOCK_MIRROR; goto again; } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Tony Luck4760.26%220.00%
Benjamin Herrenschmidt1519.23%220.00%
Tejun Heo78.97%220.00%
Grygorii Strashko56.41%220.00%
Paul Mackerras33.85%110.00%
Yinghai Lu11.28%110.00%
Total78100.00%10100.00%


static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r) { type->total_size -= type->regions[r].size; memmove(&type->regions[r], &type->regions[r + 1], (type->cnt - (r + 1)) * sizeof(type->regions[r])); type->cnt--; /* Special case for empty arrays */ if (type->cnt == 0) { WARN_ON(type->total_size != 0); type->cnt = 1; type->regions[0].base = 0; type->regions[0].size = 0; type->regions[0].flags = 0; memblock_set_region_node(&type->regions[0], MAX_NUMNODES); } }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt7953.02%233.33%
Tejun Heo5838.93%233.33%
Tang Chen117.38%116.67%
Yinghai Lu10.67%116.67%
Total149100.00%6100.00%

#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK /** * Discard memory and reserved arrays if they were allocated */
void __init memblock_discard(void) { phys_addr_t addr, size; 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); } if (memblock.memory.regions != memblock_memory_init_regions) { addr = __pa(memblock.memory.regions); size = PAGE_ALIGN(sizeof(struct memblock_region) * memblock.memory.max); __memblock_free_late(addr, size); } }

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PersonTokensPropCommitsCommitProp
Yinghai Lu3734.58%125.00%
Philipp Hachtmann3633.64%125.00%
Pavel Tatashin3431.78%250.00%
Total107100.00%4100.00%

#endif /** * 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 * allocated memory range [@new_area_start,@new_area_start+@new_area_size] * waiting to be reserved, ensure the memory used by the new array does * not overlap. * * RETURNS: * 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) { struct memblock_region *new_array, *old_array; phys_addr_t old_alloc_size, new_alloc_size; phys_addr_t old_size, new_size, addr; int use_slab = slab_is_available(); int *in_slab; /* 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; /* Calculate new doubled size */ old_size = type->max * sizeof(struct memblock_region); new_size = old_size << 1; /* * 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); /* Retrieve the slab flag */ if (type == &memblock.memory) in_slab = &memblock_memory_in_slab; else in_slab = &memblock_reserved_in_slab; /* Try to find some space for it. * * WARNING: We assume that either slab_is_available() and we use it or * we use MEMBLOCK for allocations. That means that this is unsafe to * use when bootmem is currently active (unless bootmem itself is * implemented on top of MEMBLOCK which isn't the case yet) * * This should however not be an issue for now, as we currently only * call into MEMBLOCK while it's still active, or much later when slab * is active for memory hotplug operations */ if (use_slab) { new_array = kmalloc(new_size, GFP_KERNEL); addr = new_array ? __pa(new_array) : 0; } else { /* 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, new_alloc_size, PAGE_SIZE); if (!addr && new_area_size) addr = memblock_find_in_range(0, min(new_area_start, memblock.current_limit), new_alloc_size, PAGE_SIZE); new_array = addr ? __va(addr) : NULL; } if (!addr) { pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n", type->name, type->max, type->max * 2); return -1; } memblock_dbg("memblock: %s is doubled to %ld at [%#010llx-%#010llx]", type->name, type->max * 2, (u64)addr, (u64)addr + new_size - 1); /* * 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. */ 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; /* Free old array. We needn't free it if the array is the static one */ if (*in_slab) kfree(old_array); else if (old_array != memblock_memory_init_regions && old_array != memblock_reserved_init_regions) memblock_free(__pa(old_array), old_alloc_size); /* * Reserve the new array if that comes from the memblock. Otherwise, we * needn't do it */ if (!use_slab) BUG_ON(memblock_reserve(addr, new_alloc_size)); /* Update slab flag */ *in_slab = use_slab; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt18950.67%18.33%
Gavin Shan6216.62%216.67%
Yinghai Lu5314.21%325.00%
Greg Pearson5213.94%18.33%
Tejun Heo71.88%216.67%
Andrew Morton51.34%18.33%
Heiko Carstens41.07%18.33%
Sachin Kamat10.27%18.33%
Total373100.00%12100.00%

/** * 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) { int i = 0; /* 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]; if (this->base + this->size != next->base || memblock_get_region_node(this) != memblock_get_region_node(next) || this->flags != next->flags) { BUG_ON(this->base + this->size > next->base); i++; continue; } this->size += next->size; /* move forward from next + 1, index of which is i + 2 */ memmove(next, next + 1, (type->cnt - (i + 2)) * sizeof(*next)); type->cnt--; } }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo8354.61%218.18%
Benjamin Herrenschmidt3321.71%327.27%
Paul Mackerras2214.47%19.09%
Tang Chen85.26%19.09%
Lin Feng21.32%19.09%
David Gibson21.32%19.09%
Yinghai Lu10.66%19.09%
Manish Ahuja10.66%19.09%
Total152100.00%11100.00%

/** * memblock_insert_region - insert new memblock region * @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 * @flags: flags of the new region * * Insert new memblock region [@base,@base+@size) into @type at @idx. * @type must already have extra room to accommodate the new region. */
static void __init_memblock memblock_insert_region(struct memblock_type *type, int idx, phys_addr_t base, phys_addr_t size, int nid, unsigned long flags) { 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; rgn->flags = flags; memblock_set_region_node(rgn, nid); type->cnt++; type->total_size += size; }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo8980.18%342.86%
Tang Chen109.01%114.29%
Benjamin Herrenschmidt76.31%228.57%
Paul Mackerras54.50%114.29%
Total111100.00%7100.00%

/** * memblock_add_range - add new memblock region * @type: memblock type to add new region into * @base: base address of the new region * @size: size of the new region * @nid: nid of the new region * @flags: flags of the new region * * Add new memblock region [@base,@base+@size) into @type. The new region * 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. * * RETURNS: * 0 on success, -errno on failure. */
int __init_memblock memblock_add_range(struct memblock_type *type, phys_addr_t base, phys_addr_t size, int nid, unsigned long flags) { bool insert = false; phys_addr_t obase = base; phys_addr_t end = base + memblock_cap_size(base, &size); int idx, nr_new; struct memblock_region *rgn; if (!size) return 0; /* special case for empty array */ if (type->regions[0].size == 0) { WARN_ON(type->cnt != 1 || type->total_size); type->regions[0].base = base; type->regions[0].size = size; type->regions[0].flags = flags; memblock_set_region_node(&type->regions[0], nid); type->total_size = size; return 0; } repeat: /* * The following is executed twice. Once with %false @insert and * then with %true. The first counts the number of regions needed * to accommodate the new area. The second actually inserts them. */ base = obase; nr_new = 0; for_each_memblock_type(type, rgn) { phys_addr_t rbase = rgn->base; phys_addr_t rend = rbase + rgn->size; if (rbase >= end) break; if (rend <= base) continue; /* * @rgn overlaps. If it separates the lower part of new * area, insert that portion. */ if (rbase > base) { #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP WARN_ON(nid != memblock_get_region_node(rgn)); #endif WARN_ON(flags != rgn->flags); nr_new++; if (insert) memblock_insert_region(type, idx++, base, rbase - base, nid, flags); } /* area below @rend is dealt with, forget about it */ base = min(rend, end); } /* insert the remaining portion */ if (base < end) { nr_new++; if (insert) memblock_insert_region(type, idx, base, end - base, nid, flags); } if (!nr_new) return 0; /* * If this was the first round, resize array and repeat for actual * insertions; otherwise, merge and return. */ if (!insert) { while (type->cnt + nr_new > type->max) if (memblock_double_array(type, obase, size) < 0) return -ENOMEM; insert = true; goto repeat; } else { memblock_merge_regions(type); return 0; } }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo20556.63%733.33%
Benjamin Herrenschmidt6016.57%419.05%
Wei Yang246.63%29.52%
Tang Chen195.25%14.76%
Paul Mackerras174.70%14.76%
Alexander Kuleshov154.14%29.52%
Kumar Gala92.49%14.76%
nimisolo82.21%14.76%
Greg Pearson41.10%14.76%
Philipp Hachtmann10.28%14.76%
Total362100.00%21100.00%


int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size, int nid) { return memblock_add_range(&memblock.memory, base, size, nid, 0); }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo2990.62%133.33%
Tang Chen26.25%133.33%
Philipp Hachtmann13.12%133.33%
Total32100.00%3100.00%


int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) { phys_addr_t end = base + size - 1; memblock_dbg("memblock_add: [%pa-%pa] %pF\n", &base, &end, (void *)_RET_IP_); return memblock_add_range(&memblock.memory, base, size, MAX_NUMNODES, 0); }

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PersonTokensPropCommitsCommitProp
Alexander Kuleshov2749.09%330.00%
Miles Chen1221.82%110.00%
Paul Mackerras916.36%110.00%
Benjamin Herrenschmidt23.64%110.00%
Tejun Heo23.64%220.00%
Tang Chen23.64%110.00%
Yinghai Lu11.82%110.00%
Total55100.00%10100.00%

/** * 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 * [@base,@base+@size). Crossing regions are split at the boundaries, * 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. * * RETURNS: * 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) { phys_addr_t end = base + memblock_cap_size(base, &size); int idx; struct memblock_region *rgn; *start_rgn = *end_rgn = 0; if (!size) return 0; /* we'll create at most two more regions */ while (type->cnt + 2 > type->max) if (memblock_double_array(type, base, size) < 0) return -ENOMEM; for_each_memblock_type(type, rgn) { 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; rgn->size -= base - rbase; type->total_size -= base - rbase; memblock_insert_region(type, idx, rbase, base - rbase, memblock_get_region_node(rgn), rgn->flags); } else if (rend > end) { /* * @rgn intersects from above. Split and redo the * current region - the new bottom half. */ rgn->base = end; rgn->size -= end - rbase; type->total_size -= end - rbase; memblock_insert_region(type, idx--, rbase, end - rbase, memblock_get_region_node(rgn), rgn->flags); } else { /* @rgn is fully contained, record it */ if (!*end_rgn) *start_rgn = idx; *end_rgn = idx + 1; } } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo23689.39%562.50%
Alexander Kuleshov166.06%112.50%
Tang Chen83.03%112.50%
Greg Pearson41.52%112.50%
Total264100.00%8100.00%


static int __init_memblock memblock_remove_range(struct memblock_type *type, phys_addr_t base, phys_addr_t size) { int start_rgn, end_rgn; int i, ret; ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); if (ret) return ret; for (i = end_rgn - 1; i >= start_rgn; i--) memblock_remove_region(type, i); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo4355.84%327.27%
Benjamin Herrenschmidt1418.18%327.27%
Badari Pulavarty1418.18%19.09%
Michael Ellerman33.90%19.09%
Yinghai Lu11.30%19.09%
Philipp Hachtmann11.30%19.09%
Alexander Kuleshov11.30%19.09%
Total77100.00%11100.00%


int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) { return memblock_remove_range(&memblock.memory, base, size); }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo2496.00%266.67%
Philipp Hachtmann14.00%133.33%
Total25100.00%3100.00%


int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size) { phys_addr_t end = base + size - 1; memblock_dbg(" memblock_free: [%pa-%pa] %pF\n", &base, &end, (void *)_RET_IP_); kmemleak_free_part_phys(base, size); return memblock_remove_range(&memblock.reserved, base, size); }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo3560.34%337.50%
Miles Chen1322.41%112.50%
Catalin Marinas712.07%225.00%
Grygorii Strashko23.45%112.50%
Philipp Hachtmann11.72%112.50%
Total58100.00%8100.00%


int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) { phys_addr_t end = base + size - 1; memblock_dbg("memblock_reserve: [%pa-%pa] %pF\n", &base, &end, (void *)_RET_IP_); return memblock_add_range(&memblock.reserved, base, size, MAX_NUMNODES, 0); }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo3258.18%440.00%
Miles Chen1221.82%110.00%
Alexander Kuleshov59.09%220.00%
Tang Chen35.45%110.00%
Grygorii Strashko23.64%110.00%
Philipp Hachtmann11.82%110.00%
Total55100.00%10100.00%

/** * * This function isolates region [@base, @base + @size), and sets/clears flag * * Return 0 on success, -errno on failure. */
static int __init_memblock memblock_setclr_flag(phys_addr_t base, phys_addr_t size, int set, int flag) { 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; for (i = start_rgn; i < end_rgn; i++) if (set) memblock_set_region_flags(&type->regions[i], flag); else memblock_clear_region_flags(&type->regions[i], flag); memblock_merge_regions(type); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Tang Chen8776.32%150.00%
Tony Luck2723.68%150.00%
Total114100.00%2100.00%

/** * memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG. * @base: the base phys addr of the region * @size: the size of the region * * Return 0 on success, -errno on failure. */
int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size) { return memblock_setclr_flag(base, size, 1, MEMBLOCK_HOTPLUG); }

Contributors

PersonTokensPropCommitsCommitProp
Tang Chen1875.00%150.00%
Tony Luck625.00%150.00%
Total24100.00%2100.00%

/** * 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 * * Return 0 on success, -errno on failure. */
int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size) { return memblock_setclr_flag(base, size, 0, MEMBLOCK_HOTPLUG); }

Contributors

PersonTokensPropCommitsCommitProp
Tony Luck1875.00%150.00%
Tang Chen625.00%150.00%
Total24100.00%2100.00%

/** * memblock_mark_mirror - Mark mirrored memory with flag MEMBLOCK_MIRROR. * @base: the base phys addr of the region * @size: the size of the region * * Return 0 on success, -errno on failure. */
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); }

Contributors

PersonTokensPropCommitsCommitProp
Tony Luck28100.00%1100.00%
Total28100.00%1100.00%

/** * 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 * * Return 0 on success, -errno on failure. */
int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size) { return memblock_setclr_flag(base, size, 1, MEMBLOCK_NOMAP); }

Contributors

PersonTokensPropCommitsCommitProp
Ard Biesheuvel24100.00%1100.00%
Total24100.00%1100.00%

/** * 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 * * Return 0 on success, -errno on failure. */
int __init_memblock memblock_clear_nomap(phys_addr_t base, phys_addr_t size) { return memblock_setclr_flag(base, size, 0, MEMBLOCK_NOMAP); }

Contributors

PersonTokensPropCommitsCommitProp
AKASHI Takahiro24100.00%1100.00%
Total24100.00%1100.00%

/** * __next_reserved_mem_region - next function for for_each_reserved_region() * @idx: pointer to u64 loop variable * @out_start: ptr to phys_addr_t for start address of the region, can be %NULL * @out_end: ptr to phys_addr_t for end address of the region, can be %NULL * * Iterate over all reserved memory regions. */
void __init_memblock __next_reserved_mem_region(u64 *idx, phys_addr_t *out_start, phys_addr_t *out_end) { struct memblock_type *type = &memblock.reserved; if (*idx < type->cnt) { struct memblock_region *r = &type->regions[*idx]; phys_addr_t base = r->base; phys_addr_t size = r->size; if (out_start) *out_start = base; if (out_end) *out_end = base + size - 1; *idx += 1; return; } /* signal end of iteration */ *idx = ULLONG_MAX; }

Contributors

PersonTokensPropCommitsCommitProp
Robin Holt9897.03%150.00%
Alexander Kuleshov32.97%150.00%
Total101100.00%2100.00%

/** * __next__mem_range - next function for for_each_free_mem_range() etc. * @idx: pointer to u64 loop variable * @nid: node selector, %NUMA_NO_NODE for all nodes * @flags: pick from blocks based on memory attributes * @type_a: pointer to memblock_type from where the range is taken * @type_b: pointer to memblock_type which excludes memory from being taken * @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 * * Find the first area from *@idx which matches @nid, fill the out * parameters, and update *@idx for the next iteration. The lower 32bit of * *@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 * 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. */
void __init_memblock __next_mem_range(u64 *idx, int nid, ulong flags, struct memblock_type *type_a, struct memblock_type *type_b, phys_addr_t *out_start, phys_addr_t *out_end, int *out_nid) { int idx_a = *idx & 0xffffffff; int idx_b = *idx >> 32; if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) nid = NUMA_NO_NODE; for (; idx_a < type_a->cnt; idx_a++) { struct memblock_region *m = &type_a->regions[idx_a]; phys_addr_t m_start = m->base; phys_addr_t m_end = m->base + m->size; int m_nid = memblock_get_region_node(m); /* only memory regions are associated with nodes, check it */ if (nid != NUMA_NO_NODE && nid != m_nid) continue; /* skip hotpluggable memory regions if needed */ if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) continue; /* if we want mirror memory skip non-mirror memory regions */ if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) continue; /* skip nomap memory unless we were asked for it explicitly */ if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) continue; 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 ? r->base : ULLONG_MAX; /* * if idx_b advanced past idx_a, * break out to advance idx_a */ if (r_start >= m_end) break; /* if the two regions intersect, we're done */ if (m_start < r_end) { if (out_start) *out_start = max(m_start, r_start); if (out_end) *out_end = min(m_end, r_end); if (out_nid) *out_nid = m_nid; /* * The region which ends first is * advanced for the next iteration. */ if (m_end <= r_end) idx_a++; else idx_b++; *idx = (u32)idx_a | (u64)idx_b << 32; return; } } } /* signal end of iteration */ *idx = ULLONG_MAX; }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo22055.70%112.50%
Philipp Hachtmann11027.85%112.50%
Tony Luck194.81%225.00%
Grygorii Strashko184.56%225.00%
Ard Biesheuvel164.05%112.50%
Xishi Qiu123.04%112.50%
Total395100.00%8100.00%

/** * __next_mem_range_rev - generic next function for for_each_*_range_rev() * * Finds the next range from type_a which is not marked as unsuitable * in type_b. * * @idx: pointer to u64 loop variable * @nid: node selector, %NUMA_NO_NODE for all nodes * @flags: pick from blocks based on memory attributes * @type_a: pointer to memblock_type from where the range is taken * @type_b: pointer to memblock_type which excludes memory from being taken * @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 * * Reverse of __next_mem_range(). */
void __init_memblock __next_mem_range_rev(u64 *idx, int nid, ulong flags, struct memblock_type *type_a, struct memblock_type *type_b, phys_addr_t *out_start, phys_addr_t *out_end, int *out_nid) { int idx_a = *idx & 0xffffffff; int idx_b = *idx >> 32; if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) nid = NUMA_NO_NODE; if (*idx == (u64)ULLONG_MAX) { idx_a = type_a->cnt - 1; if (type_b != NULL) idx_b = type_b->cnt; else idx_b = 0; } for (; idx_a >= 0; idx_a--) { struct memblock_region *m = &type_a->regions[idx_a]; phys_addr_t m_start = m->base; phys_addr_t m_end = m->base + m->size; int m_nid = memblock_get_region_node(m); /* only memory regions are associated with nodes, check it */ if (nid != NUMA_NO_NODE && nid != m_nid) continue; /* skip hotpluggable memory regions if needed */ if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) continue; /* if we want mirror memory skip non-mirror memory regions */ if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) continue; /* skip nomap memory unless we were asked for it explicitly */ if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) continue; 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 >= 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 ? r->base : ULLONG_MAX; /* * if idx_b advanced past idx_a, * break out to advance idx_a */ 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) *out_nid = m_nid; if (m_start >= r_start) idx_a--; else idx_b--; *idx = (u32)idx_a | (u64)idx_b << 32; return; } } } /* signal end of iteration */ *idx = ULLONG_MAX; }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo21450.35%421.05%
Philipp Hachtmann11126.12%15.26%
Tony Luck194.47%210.53%
Benjamin Herrenschmidt194.47%315.79%
Grygorii Strashko184.24%210.53%
Ard Biesheuvel163.76%15.26%
Tang Chen122.82%15.26%
zijun_hu122.82%210.53%
David S. Miller20.47%15.26%
Paul Mackerras10.24%15.26%
Michael Ellerman10.24%15.26%
Total425100.00%19100.00%

#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP /* * Common iterator interface used to define for_each_mem_range(). */
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; while (++*idx < type->cnt) { r = &type->regions[*idx]; if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) continue; if (nid == MAX_NUMNODES || nid == r->nid) 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) *out_nid = r->nid; }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo13785.62%125.00%
Benjamin Herrenschmidt2314.38%375.00%
Total160100.00%4100.00%


unsigned long __init_memblock memblock_next_valid_pfn(unsigned long pfn, unsigned long max_pfn) { struct memblock_type *type = &memblock.memory; unsigned int right = type->cnt; unsigned int mid, left = 0; phys_addr_t addr = PFN_PHYS(pfn + 1); do { 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 { /* addr is within the region, so pfn + 1 is valid */ return min(pfn + 1, max_pfn); } } while (left < right); if (right == type->cnt) return max_pfn; else return min(PHYS_PFN(type->regions[right].base), max_pfn); }

Contributors

PersonTokensPropCommitsCommitProp
Paul Burton15192.64%150.00%
AKASHI Takahiro127.36%150.00%
Total163100.00%2100.00%

/** * 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 * @type: memblock type to set node ID for * @nid: node ID to set * * Set the nid of memblock @type regions in [@base,@base+@size) to @nid. * Regions which cross the area boundaries are split as necessary. * * RETURNS: * 0 on success, -errno on failure. */
int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, struct memblock_type *type, int nid) { int start_rgn, end_rgn; int i, ret; ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); if (ret) return ret; for (i = start_rgn; i < end_rgn; i++) memblock_set_region_node(&type->regions[i], nid); memblock_merge_regions(type); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo7382.95%233.33%
Benjamin Herrenschmidt55.68%233.33%
Wanpeng Li55.68%116.67%
Tang Chen55.68%116.67%
Total88100.00%6100.00%

#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size, phys_addr_t align, phys_addr_t start, phys_addr_t end, int nid, ulong flags) { phys_addr_t found; if (!align) align = SMP_CACHE_BYTES; found = memblock_find_in_range_node(size, align, start, end, nid, flags); if (found && !memblock_reserve(found, size)) { /* * The min_count is set to 0 so that memblock allocations are * never reported as leaks. */ kmemleak_alloc_phys(found, size, 0, 0); return found; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo3136.05%320.00%
Catalin Marinas1416.28%213.33%
Benjamin Herrenschmidt1416.28%320.00%
Vineet Gupta89.30%16.67%
Akinobu Mita78.14%16.67%
Tony Luck55.81%16.67%
Grygorii Strashko33.49%213.33%
David S. Miller22.33%16.67%
Paul Mackerras22.33%16.67%
Total86100.00%15100.00%


phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align, phys_addr_t start, phys_addr_t end, ulong flags) { return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE, flags); }

Contributors

PersonTokensPropCommitsCommitProp
Akinobu Mita3286.49%150.00%
Tony Luck513.51%150.00%
Total37100.00%2100.00%


static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr, int nid, ulong flags) { return memblock_alloc_range_nid(size, align, 0, max_addr, nid, flags); }

Contributors

PersonTokensPropCommitsCommitProp
Akinobu Mita3386.84%150.00%
Tony Luck513.16%150.00%
Total38100.00%2100.00%


phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid) { ulong flags = choose_memblock_flags(); phys_addr_t ret; again: ret = memblock_alloc_base_nid(size, align, MEMBLOCK_ALLOC_ACCESSIBLE, nid, flags); if (!ret && (flags & MEMBLOCK_MIRROR)) { flags &= ~MEMBLOCK_MIRROR; goto again; } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Tony Luck3960.00%240.00%
Benjamin Herrenschmidt1421.54%240.00%
Tejun Heo1218.46%120.00%
Total65100.00%5100.00%


phys_addr_t __init __memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) { return memblock_alloc_base_nid(size, align, max_addr, NUMA_NO_NODE, MEMBLOCK_NONE); }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo2068.97%233.33%
Benjamin Herrenschmidt620.69%233.33%
Tony Luck26.90%116.67%
Grygorii Strashko13.45%116.67%
Total29100.00%6100.00%


phys_addr_t __init memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) { phys_addr_t alloc; alloc = __memblock_alloc_base(size, align, max_addr); if (alloc == 0) panic("ERROR: Failed to allocate %pa bytes below %pa.\n", &size, &max_addr); return alloc; }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo3571.43%240.00%
Benjamin Herrenschmidt1122.45%240.00%
Miles Chen36.12%120.00%
Total49100.00%5100.00%


phys_addr_t __init memblock_alloc(phys_addr_t size, phys_addr_t align) { return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo1986.36%133.33%
Benjamin Herrenschmidt313.64%266.67%
Total22100.00%3100.00%


phys_addr_t __init memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid) { phys_addr_t res = memblock_alloc_nid(size, align, nid); if (res) return res; return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt4397.73%480.00%
Tejun Heo12.27%120.00%
Total44100.00%5100.00%

/** * memblock_virt_alloc_internal - allocate boot memory block * @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 * * The @min_addr limit is dropped if it can not be satisfied and the allocation * will fall back to memory below @min_addr. Also, allocation may fall back * to any node in the system if the specified node can not * hold the requested memory. * * The allocation is performed from memory region limited by * memblock.current_limit if @max_addr == %BOOTMEM_ALLOC_ACCESSIBLE. * * The memory block is aligned on SMP_CACHE_BYTES if @align == 0. * * The phys address of allocated boot memory block is converted to virtual and * allocated memory is reset to 0. * * In addition, function sets the min_count to 0 using kmemleak_alloc for * allocated boot memory block, so that it is never reported as leaks. * * RETURNS: * Virtual address of allocated memory block on success, NULL on failure. */
static void * __init memblock_virt_alloc_internal( phys_addr_t size, phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid) { phys_addr_t alloc; void *ptr; ulong flags = choose_memblock_flags(); if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) nid = NUMA_NO_NODE; /* * Detect any accidental use of these APIs after slab is ready, as at * this moment memblock may be deinitialized already and its * internal data may be destroyed (after execution of free_all_bootmem) */ if (WARN_ON_ONCE(slab_is_available())) return kzalloc_node(size, GFP_NOWAIT, nid); if (!align) align = SMP_CACHE_BYTES; if (max_addr > memblock.current_limit) max_addr = memblock.current_limit; again: alloc = memblock_find_in_range_node(size, align, min_addr, max_addr, nid, flags); if (alloc && !memblock_reserve(alloc, size)) goto done; if (nid != NUMA_NO_NODE) { alloc = memblock_find_in_range_node(size, align, min_addr, max_addr, NUMA_NO_NODE, flags); if (alloc && !memblock_reserve(alloc, size)) goto done; } if (min_addr) { min_addr = 0; goto again; } if (flags & MEMBLOCK_MIRROR) { flags &= ~MEMBLOCK_MIRROR; pr_warn("Could not allocate %pap bytes of mirrored memory\n", &size); goto again; } return NULL; done: ptr = phys_to_virt(alloc); memset(ptr, 0, size); /* * The min_count is set to 0 so that bootmem 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. */ kmemleak_alloc(ptr, size, 0, 0); return ptr; }

Contributors

PersonTokensPropCommitsCommitProp
Santosh Shilimkar17070.83%116.67%
Tony Luck3313.75%233.33%
Wei Yang166.67%116.67%
Yinghai Lu145.83%116.67%
Grygorii Strashko72.92%116.67%
Total240100.00%6100.00%

/** * memblock_virt_alloc_try_nid_nopanic - allocate boot memory block * @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 %BOOTMEM_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 version of _memblock_virt_alloc_try_nid_nopanic() which provides * additional debug information (including caller info), if enabled. * * RETURNS: * Virtual address of allocated memory block on success, NULL on failure. */
void * __init memblock_virt_alloc_try_nid_nopanic( phys_addr_t size, phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid) { memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx %pF\n", __func__, (u64)size, (u64)align, nid, (u64)min_addr, (u64)max_addr, (void *)_RET_IP_); return memblock_virt_alloc_internal(size, align, min_addr, max_addr, nid); }

Contributors

PersonTokensPropCommitsCommitProp
Santosh Shilimkar71100.00%1100.00%
Total71100.00%1100.00%

/** * memblock_virt_alloc_try_nid - allocate boot memory block with 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 * is preferred (phys address), or %BOOTMEM_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 panicking version of _memblock_virt_alloc_try_nid_nopanic() * which provides debug information (including caller info), if enabled, * and panics if the request can not be satisfied. * * RETURNS: * Virtual address of allocated memory block on success, NULL on failure. */
void * __init memblock_virt_alloc_try_nid( 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=0x%llx max_addr=0x%llx %pF\n", __func__, (u64)size, (u64)align, nid, (u64)min_addr, (u64)max_addr, (void *)_RET_IP_); ptr = memblock_virt_alloc_internal(size, align, min_addr, max_addr, nid); if (ptr) return ptr; panic("%s: Failed to allocate %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx\n", __func__, (u64)size, (u64)align, nid, (u64)min_addr, (u64)max_addr); return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Santosh Shilimkar115100.00%1100.00%
Total115100.00%1100.00%

/** * __memblock_free_early - 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_virt_alloc_xx() API. * The freeing memory will not be released to the buddy allocator. */
void __init __memblock_free_early(phys_addr_t base, phys_addr_t size) { memblock_dbg("%s: [%#016llx-%#016llx] %pF\n", __func__, (u64)base, (u64)base + size - 1, (void *)_RET_IP_); kmemleak_free_part_phys(base, size); memblock_remove_range(&memblock.reserved, base, size); }

Contributors

PersonTokensPropCommitsCommitProp
Santosh Shilimkar5696.55%133.33%
Philipp Hachtmann11.72%133.33%
Catalin Marinas11.72%133.33%
Total58100.00%3100.00%

/* * __memblock_free_late - free bootmem block pages directly to buddy allocator * @addr: phys starting address of the boot memory block * @size: size of the boot memory block in bytes * * This is only useful when the bootmem allocator has already been torn * down, but we are still initializing the system. Pages are released directly * to the buddy allocator, no bootmem metadata is updated because it is gone. */
void __init __memblock_free_late(phys_addr_t base, phys_addr_t size) { u64 cursor, end; memblock_dbg("%s: [%#016llx-%#016llx] %pF\n", __func__, (u64)base, (u64)base + size - 1, (void *)_RET_IP_); kmemleak_free_part_phys(base, size); cursor = PFN_UP(base); end = PFN_DOWN(base + size); for (; cursor < end; cursor++) { __free_pages_bootmem(pfn_to_page(cursor), cursor, 0); totalram_pages++; } }

Contributors

PersonTokensPropCommitsCommitProp
Santosh Shilimkar9196.81%133.33%
Mel Gorman22.13%133.33%
Catalin Marinas11.06%133.33%
Total94100.00%3100.00%

/* * Remaining API functions */
phys_addr_t __init_memblock memblock_phys_mem_size(void) { return memblock.memory.total_size; }

Contributors

PersonTokensPropCommitsCommitProp
Paul Mackerras853.33%120.00%
Tejun Heo320.00%120.00%
Yinghai Lu213.33%120.00%
David Gibson16.67%120.00%
Benjamin Herrenschmidt16.67%120.00%
Total15100.00%5100.00%


phys_addr_t __init_memblock memblock_reserved_size(void) { return memblock.reserved.total_size; }

Contributors

PersonTokensPropCommitsCommitProp
Srikar Dronamraju15100.00%1100.00%
Total15100.00%1100.00%


phys_addr_t __init memblock_mem_size(unsigned long limit_pfn) { unsigned long pages = 0; struct memblock_region *r; unsigned long start_pfn, end_pfn; for_each_memblock(memory, r) { start_pfn = memblock_region_memory_base_pfn(r); end_pfn = memblock_region_memory_end_pfn(r); start_pfn = min_t(unsigned long, start_pfn, limit_pfn); end_pfn = min_t(unsigned long, end_pfn, limit_pfn); pages += end_pfn - start_pfn; } return PFN_PHYS(pages); }

Contributors

PersonTokensPropCommitsCommitProp
Yinghai Lu8096.39%150.00%
Fabian Frederick33.61%150.00%
Total83100.00%2100.00%

/* lowest address */
phys_addr_t __init_memblock memblock_start_of_DRAM(void) { return memblock.memory.regions[0].base; }

Contributors

PersonTokensPropCommitsCommitProp
Sam Ravnborg20100.00%1100.00%
Total20100.00%1100.00%


phys_addr_t __init_memblock memblock_end_of_DRAM(void) { int idx = memblock.memory.cnt - 1; return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); }

Contributors

PersonTokensPropCommitsCommitProp
Paul Mackerras3681.82%120.00%
Yinghai Lu511.36%240.00%
Benjamin Herrenschmidt36.82%240.00%
Total44100.00%5100.00%


static phys_addr_t __init_memblock __find_max_addr(phys_addr_t limit) { phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX; struct memblock_region *r; /* * translate the memory @limit size into the max address within one of * the memory memblock regions, if the @limit exceeds the total size * of those regions, max_addr will keep original value ULLONG_MAX */ for_each_memblock(memory, r) { if (limit <= r->size) { max_addr = r->base + limit; break; } limit -= r->size; } return max_addr; }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo2440.00%114.29%
Paul Mackerras1220.00%114.29%
Emil Medve1118.33%114.29%
Dennis Chen915.00%114.29%
Benjamin Herrenschmidt23.33%114.29%
Michael Ellerman11.67%114.29%
David S. Miller11.67%114.29%
Total60100.00%7100.00%


void __init memblock_enforce_memory_limit(phys_addr_t limit) { phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX; if (!limit) return; max_addr = __find_max_addr(limit); /* @limit exceeds the total size of the memory, do nothing */ if (max_addr == (phys_addr_t)ULLONG_MAX) return; /* truncate both memory and reserved regions */ memblock_remove_range(&memblock.memory, max_addr, (phys_addr_t)ULLONG_MAX); memblock_remove_range(&memblock.reserved, max_addr, (phys_addr_t)ULLONG_MAX); }

Contributors

PersonTokensPropCommitsCommitProp
Dennis Chen4055.56%116.67%
Tejun Heo1520.83%116.67%
Michael Ellerman1216.67%116.67%
Yinghai Lu22.78%116.67%
Philipp Hachtmann22.78%116.67%
Paul Mackerras11.39%116.67%
Total72100.00%6100.00%


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, base + size, (phys_addr_t)ULLONG_MAX); }

Contributors

PersonTokensPropCommitsCommitProp
AKASHI Takahiro9354.71%150.00%
Dennis Chen7745.29%150.00%
Total170100.00%2100.00%


void __init memblock_mem_limit_remove_map(phys_addr_t limit) { phys_addr_t max_addr; if (!limit) return; max_addr = __find_max_addr(limit); /* @limit exceeds the total size of the memory, do nothing */ if (max_addr == (phys_addr_t)ULLONG_MAX) return; memblock_cap_memory_range(0, max_addr); }

Contributors

PersonTokensPropCommitsCommitProp
AKASHI Takahiro3683.72%150.00%
Dennis Chen716.28%150.00%
Total43100.00%2100.00%


static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) { 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; }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt9590.48%250.00%
Kumar Gala98.57%125.00%
Yinghai Lu10.95%125.00%
Total105100.00%4100.00%


bool __init memblock_is_reserved(phys_addr_t addr) { return memblock_search(&memblock.reserved, addr) != -1; }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt1982.61%240.00%
Kumar Gala28.70%120.00%
Yinghai Lu14.35%120.00%
Yaowei Bai14.35%120.00%
Total23100.00%5100.00%


bool __init_memblock memblock_is_memory(phys_addr_t addr) { return memblock_search(&memblock.memory, addr) != -1; }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt2191.30%133.33%
Yaowei Bai14.35%133.33%
Yinghai Lu14.35%133.33%
Total23100.00%3100.00%


int __init_memblock memblock_is_map_memory(phys_addr_t addr) { int i = memblock_search(&memblock.memory, addr); if (i == -1) return false; return !memblock_is_nomap(&memblock.memory.regions[i]); }

Contributors

PersonTokensPropCommitsCommitProp
Ard Biesheuvel47100.00%1100.00%
Total47100.00%1100.00%

#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
int __init_memblock memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn, unsigned long *end_pfn) { struct memblock_type *type = &memblock.memory; int mid = memblock_search(type, PFN_PHYS(pfn)); if (mid == -1) return -1; *start_pfn = PFN_DOWN(type->regions[mid].base); *end_pfn = PFN_DOWN(type->regions[mid].base + type->regions[mid].size); return type->regions[mid].nid; }

Contributors

PersonTokensPropCommitsCommitProp
Yinghai Lu9491.26%133.33%
Fabian Frederick98.74%266.67%
Total103100.00%3100.00%

#endif /** * 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 * * Check if the region [@base, @base+@size) is a subset of a memory block. * * RETURNS: * 0 if false, non-zero if true */
int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size) { int idx = memblock_search(&memblock.memory, base); phys_addr_t end = base + memblock_cap_size(base, &size); if (idx == -1) return 0; return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size) >= end; }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt5776.00%125.00%
Tejun Heo1418.67%125.00%
Tomi Valkeinen34.00%125.00%
Yinghai Lu11.33%125.00%
Total75100.00%4100.00%

/** * memblock_is_region_reserved - check if a region intersects reserved memory * @base: base of region to check * @size: size of region to check * * Check if the region [@base, @base+@size) intersects a reserved memory block. * * RETURNS: * True if they intersect, false if not. */
bool __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) { memblock_cap_size(base, &size); return memblock_overlaps_region(&memblock.reserved, base, size); }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt2369.70%125.00%
Tejun Heo824.24%125.00%
Tang Chen13.03%125.00%
Yinghai Lu13.03%125.00%
Total33100.00%4100.00%


void __init_memblock memblock_trim_memory(phys_addr_t align) { phys_addr_t start, end, orig_start, orig_end; struct memblock_region *r; for_each_memblock(memory, r) { orig_start = r->base; orig_end = r->base + r->size; start = round_up(orig_start, align); end = round_down(orig_end, align); if (start == orig_start && end == orig_end) continue; if (start < end) { r->base = start; r->size = end - start; } else { memblock_remove_region(&memblock.memory, r - memblock.memory.regions); r--; } } }

Contributors

PersonTokensPropCommitsCommitProp
Yinghai Lu9579.17%150.00%
Emil Medve2520.83%150.00%
Total120100.00%2100.00%


void __init_memblock memblock_set_current_limit(phys_addr_t limit) { memblock.current_limit = limit; }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt1493.33%150.00%
Yinghai Lu16.67%150.00%
Total15100.00%2100.00%


phys_addr_t __init_memblock memblock_get_current_limit(void) { return memblock.current_limit; }

Contributors

PersonTokensPropCommitsCommitProp
Laura Abbott13100.00%1100.00%
Total13100.00%1100.00%


static void __init_memblock memblock_dump(struct memblock_type *type) { phys_addr_t base, end, size; unsigned long flags; int idx; struct memblock_region *rgn; pr_info(" %s.cnt = 0x%lx\n", type->name, type->cnt); for_each_memblock_type(type, rgn) { char nid_buf[32] = ""; base = rgn->base; size = rgn->size; end = base + size - 1; flags = rgn->flags; #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP if (memblock_get_region_node(rgn) != MAX_NUMNODES) snprintf(nid_buf, sizeof(nid_buf), " on node %d", memblock_get_region_node(rgn)); #endif pr_info(" %s[%#x]\t[%pa-%pa], %pa bytes%s flags: %#lx\n", type->name, idx, &base, &end, &size, nid_buf, flags); } }

Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo4834.04%114.29%
Benjamin Herrenschmidt4733.33%114.29%
Miles Chen1611.35%114.29%
Alexander Kuleshov139.22%114.29%
Tang Chen128.51%114.29%
Heiko Carstens42.84%114.29%
Yinghai Lu10.71%114.29%
Total141100.00%7100.00%


extern unsigned long __init_memblock memblock_reserved_memory_within(phys_addr_t start_addr, phys_addr_t end_addr) { struct memblock_region *rgn; unsigned long size = 0; int idx; for_each_memblock_type((&memblock.reserved), rgn) { phys_addr_t start, end; if (rgn->base + rgn->size < start_addr) continue; if (rgn->base > end_addr) continue; start = rgn->base; end = start + rgn->size; size += end - start; } return size; }

Contributors

PersonTokensPropCommitsCommitProp
Michal Hocko86100.00%1100.00%
Total86100.00%1100.00%


void __init_memblock __memblock_dump_all(void) { pr_info("MEMBLOCK configuration:\n"); pr_info(" memory size = %pa reserved size = %pa\n", &memblock.memory.total_size, &memblock.reserved.total_size); memblock_dump(&memblock.memory); memblock_dump(&memblock.reserved); #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP memblock_dump(&memblock.physmem); #endif }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt3354.10%225.00%
Heiko Carstens1321.31%112.50%
Tejun Heo1016.39%225.00%
Miles Chen34.92%112.50%
Kumar Gala11.64%112.50%
Yinghai Lu11.64%112.50%
Total61100.00%8100.00%


void __init memblock_allow_resize(void) { memblock_can_resize = 1; }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt1191.67%480.00%
Tejun Heo18.33%120.00%
Total12100.00%5100.00%


static int __init early_memblock(char *p) { if (p && strstr(p, "debug")) memblock_debug = 1; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt29100.00%1100.00%
Total29100.00%1100.00%

early_param("memblock", early_memblock); #if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_ARCH_DISCARD_MEMBLOCK)
static int memblock_debug_show(struct seq_file *m, void *private) { struct memblock_type *type = m->private; struct memblock_region *reg; int i; phys_addr_t end; for (i = 0; i < type->cnt; i++) { reg = &type->regions[i]; end = reg->base + reg->size - 1; seq_printf(m, "%4d: ", i); seq_printf(m, "%pa..%pa\n", &reg->base, &end); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt8483.17%150.00%
Miles Chen1716.83%150.00%
Total101100.00%2100.00%


static int memblock_debug_open(struct inode *inode, struct file *file) { return single_open(file, memblock_debug_show, inode->i_private); }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt28100.00%1100.00%
Total28100.00%1100.00%

static const struct file_operations memblock_debug_fops = { .open = memblock_debug_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, };
static int __init memblock_init_debugfs(void) { struct dentry *root = debugfs_create_dir("memblock", NULL); if (!root) return -ENXIO; debugfs_create_file("memory", S_IRUGO, root, &memblock.memory, &memblock_debug_fops); debugfs_create_file("reserved", S_IRUGO, root, &memblock.reserved, &memblock_debug_fops); #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP debugfs_create_file("physmem", S_IRUGO, root, &memblock.physmem, &memblock_debug_fops); #endif return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Herrenschmidt6775.28%150.00%
Philipp Hachtmann2224.72%150.00%
Total89100.00%2100.00%

__initcall(memblock_init_debugfs); #endif /* CONFIG_DEBUG_FS */

Overall Contributors

PersonTokensPropCommitsCommitProp
Tejun Heo184926.95%2115.00%
Benjamin Herrenschmidt116116.92%1712.14%
Tang Chen5407.87%96.43%
Santosh Shilimkar5147.49%10.71%
Yinghai Lu4206.12%117.86%
Philipp Hachtmann3354.88%42.86%
Tony Luck2964.31%32.14%
Paul Mackerras2032.96%21.43%
AKASHI Takahiro1662.42%32.14%
Paul Burton1512.20%10.71%
Dennis Chen1331.94%10.71%
Ard Biesheuvel1041.52%10.71%
Robin Holt991.44%10.71%
Alexander Kuleshov951.38%107.14%
Michal Hocko861.25%10.71%
Miles Chen761.11%10.71%
Gavin Shan761.11%21.43%
Akinobu Mita721.05%10.71%
Greg Pearson610.89%10.71%
Grygorii Strashko600.87%53.57%
Heiko Carstens420.61%21.43%
Wei Yang400.58%32.14%
Emil Medve360.52%10.71%
Pavel Tatashin350.51%21.43%
Catalin Marinas230.34%21.43%
Sam Ravnborg210.31%10.71%
Kumar Gala210.31%21.43%
Michael Ellerman170.25%32.14%
Srikar Dronamraju150.22%10.71%
Badari Pulavarty140.20%10.71%
Laura Abbott130.19%10.71%
Xishi Qiu120.17%10.71%
zijun_hu120.17%21.43%
Fabian Frederick120.17%21.43%
nimisolo80.12%10.71%
Vineet Gupta80.12%10.71%
David S. Miller70.10%53.57%
Wanpeng Li50.07%10.71%
Andrew Morton50.07%10.71%
Tomi Valkeinen30.04%10.71%
David Gibson30.04%21.43%
Yaowei Bai20.03%10.71%
Mel Gorman20.03%10.71%
Lin Feng20.03%10.71%
Christoph Hellwig10.01%10.71%
Joe Perches10.01%10.71%
Manish Ahuja10.01%10.71%
Stephen Boyd10.01%10.71%
Sachin Kamat10.01%10.71%
Total6860100.00%140100.00%
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