Release 4.11 mm/memblock.c

/*
 * 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;
#ifdef CONFIG_MOVABLE_NODE

bool movable_node_enabled __initdata_memblock = false;
#endif

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
Person
Tokens
Prop
Commits
CommitProp
Tony Luck
15
100.00%
1
100.00%
Total
15
100.00%
1
100.00%

/* 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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
31
100.00%
1
100.00%
Total
31
100.00%
1
100.00%

/*
 * 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
Person
Tokens
Prop
Commits
CommitProp
Paul Mackerras
37
86.05%
1
25.00%
Benjamin Herrenschmidt
4
9.30%
1
25.00%
Yinghai Lu
2
4.65%
2
50.00%
Total
43
100.00%
4
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Paul Mackerras
37
52.11%
1
16.67%
Benjamin Herrenschmidt
23
32.39%
2
33.33%
Alexander Kuleshov
9
12.68%
1
16.67%
Tang Chen
1
1.41%
1
16.67%
Yinghai Lu
1
1.41%
1
16.67%
Total
71
100.00%
6
100.00%

/*
 * __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
Person
Tokens
Prop
Commits
CommitProp
Tang Chen
95
95.00%
1
50.00%
Tony Luck
5
5.00%
1
50.00%
Total
100
100.00%
2
100.00%

/**
 * __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
Person
Tokens
Prop
Commits
CommitProp
Tang Chen
98
95.15%
2
66.67%
Tony Luck
5
4.85%
1
33.33%
Total
103
100.00%
3
100.00%

/**
 * 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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Tang Chen
132
91.67%
3
50.00%
Tony Luck
7
4.86%
1
16.67%
Grygorii Strashko
4
2.78%
1
16.67%
Joe Perches
1
0.69%
1
16.67%
Total
144
100.00%
6
100.00%

/**
 * 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
Person
Tokens
Prop
Commits
CommitProp
Tony Luck
47
60.26%
2
20.00%
Benjamin Herrenschmidt
15
19.23%
2
20.00%
Tejun Heo
7
8.97%
2
20.00%
Grygorii Strashko
5
6.41%
2
20.00%
Paul Mackerras
3
3.85%
1
10.00%
Yinghai Lu
1
1.28%
1
10.00%
Total
78
100.00%
10
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Benjamin Herrenschmidt
79
53.02%
2
33.33%
Tejun Heo
58
38.93%
2
33.33%
Tang Chen
11
7.38%
1
16.67%
Yinghai Lu
1
0.67%
1
16.67%
Total
149
100.00%
6
100.00%

#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK



phys_addr_t __init_memblock get_allocated_memblock_reserved_regions_info(
					phys_addr_t *addr)
{
	if (memblock.reserved.regions == memblock_reserved_init_regions)
		return 0;

	*addr = __pa(memblock.reserved.regions);

	return PAGE_ALIGN(sizeof(struct memblock_region) *
			  memblock.reserved.max);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Yinghai Lu
51
100.00%
1
100.00%
Total
51
100.00%
1
100.00%



phys_addr_t __init_memblock get_allocated_memblock_memory_regions_info(
					phys_addr_t *addr)
{
	if (memblock.memory.regions == memblock_memory_init_regions)
		return 0;

	*addr = __pa(memblock.memory.regions);

	return PAGE_ALIGN(sizeof(struct memblock_region) *
			  memblock.memory.max);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Philipp Hachtmann
51
100.00%
1
100.00%
Total
51
100.00%
1
100.00%

#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
Person
Tokens
Prop
Commits
CommitProp
Benjamin Herrenschmidt
189
50.67%
1
8.33%
Gavin Shan
62
16.62%
2
16.67%
Yinghai Lu
53
14.21%
3
25.00%
Greg Pearson
52
13.94%
1
8.33%
Tejun Heo
7
1.88%
2
16.67%
Andrew Morton
5
1.34%
1
8.33%
Heiko Carstens
4
1.07%
1
8.33%
Sachin Kamat
1
0.27%
1
8.33%
Total
373
100.00%
12
100.00%

/**
 * 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
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
83
54.61%
2
18.18%
Benjamin Herrenschmidt
35
23.03%
3
27.27%
Paul Mackerras
20
13.16%
1
9.09%
Tang Chen
8
5.26%
1
9.09%
Lin Feng
2
1.32%
1
9.09%
David Gibson
2
1.32%
1
9.09%
Yinghai Lu
1
0.66%
1
9.09%
Manish Ahuja
1
0.66%
1
9.09%
Total
152
100.00%
11
100.00%

/**
 * 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
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
89
80.18%
3
42.86%
Tang Chen
10
9.01%
1
14.29%
Benjamin Herrenschmidt
7
6.31%
2
28.57%
Paul Mackerras
5
4.50%
1
14.29%
Total
111
100.00%
7
100.00%

/**
 * 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
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
205
56.63%
7
33.33%
Benjamin Herrenschmidt
60
16.57%
4
19.05%
Wei Yang
24
6.63%
2
9.52%
Tang Chen
19
5.25%
1
4.76%
Paul Mackerras
17
4.70%
1
4.76%
Alexander Kuleshov
15
4.14%
2
9.52%
Kumar Gala
9
2.49%
1
4.76%
nimisolo
8
2.21%
1
4.76%
Greg Pearson
4
1.10%
1
4.76%
Philipp Hachtmann
1
0.28%
1
4.76%
Total
362
100.00%
21
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
29
90.62%
1
33.33%
Tang Chen
2
6.25%
1
33.33%
Philipp Hachtmann
1
3.12%
1
33.33%
Total
32
100.00%
3
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alexander Kuleshov
26
47.27%
3
30.00%
Miles Chen
12
21.82%
1
10.00%
Paul Mackerras
10
18.18%
1
10.00%
Tang Chen
2
3.64%
1
10.00%
Tejun Heo
2
3.64%
2
20.00%
Benjamin Herrenschmidt
2
3.64%
1
10.00%
Yinghai Lu
1
1.82%
1
10.00%
Total
55
100.00%
10
100.00%

/**
 * 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
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
236
89.39%
5
62.50%
Alexander Kuleshov
16
6.06%
1
12.50%
Tang Chen
8
3.03%
1
12.50%
Greg Pearson
4
1.52%
1
12.50%
Total
264
100.00%
8
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
43
55.84%
3
27.27%
Badari Pulavarty
14
18.18%
1
9.09%
Benjamin Herrenschmidt
14
18.18%
3
27.27%
Michael Ellerman
3
3.90%
1
9.09%
Philipp Hachtmann
1
1.30%
1
9.09%
Alexander Kuleshov
1
1.30%
1
9.09%
Yinghai Lu
1
1.30%
1
9.09%
Total
77
100.00%
11
100.00%



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


Contributors
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
24
96.00%
2
66.67%
Philipp Hachtmann
1
4.00%
1
33.33%
Total
25
100.00%
3
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
35
60.34%
3
37.50%
Miles Chen
13
22.41%
1
12.50%
Catalin Marinas
7
12.07%
2
25.00%
Grygorii Strashko
2
3.45%
1
12.50%
Philipp Hachtmann
1
1.72%
1
12.50%
Total
58
100.00%
8
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
32
58.18%
4
40.00%
Miles Chen
12
21.82%
1
10.00%
Alexander Kuleshov
5
9.09%
2
20.00%
Tang Chen
3
5.45%
1
10.00%
Grygorii Strashko
2
3.64%
1
10.00%
Philipp Hachtmann
1
1.82%
1
10.00%
Total
55
100.00%
10
100.00%

/**
 *
 * 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
Person
Tokens
Prop
Commits
CommitProp
Tang Chen
87
76.32%
1
50.00%
Tony Luck
27
23.68%
1
50.00%
Total
114
100.00%
2
100.00%

/**
 * 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
Person
Tokens
Prop
Commits
CommitProp
Tang Chen
18
75.00%
1
50.00%
Tony Luck
6
25.00%
1
50.00%
Total
24
100.00%
2
100.00%

/**
 * 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
Person
Tokens
Prop
Commits
CommitProp
Tony Luck
18
75.00%
1
50.00%
Tang Chen
6
25.00%
1
50.00%
Total
24
100.00%
2
100.00%

/**
 * 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
Person
Tokens
Prop
Commits
CommitProp
Tony Luck
28
100.00%
1
100.00%
Total
28
100.00%
1
100.00%

/**
 * 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
Person
Tokens
Prop
Commits
CommitProp
Ard Biesheuvel
24
100.00%
1
100.00%
Total
24
100.00%
1
100.00%

/**
 * __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
Person
Tokens
Prop
Commits
CommitProp
Robin Holt
98
97.03%
1
50.00%
Alexander Kuleshov
3
2.97%
1
50.00%
Total
101
100.00%
2
100.00%

/**
 * __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
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
220
55.70%
1
12.50%
Philipp Hachtmann
110
27.85%
1
12.50%
Tony Luck
19
4.81%
2
25.00%
Grygorii Strashko
18
4.56%
2
25.00%
Ard Biesheuvel
16
4.05%
1
12.50%
Xishi Qiu
12
3.04%
1
12.50%
Total
395
100.00%
8
100.00%

/**
 * __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
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
215
50.59%
4
20.00%
Philipp Hachtmann
111
26.12%
1
5.00%
Tony Luck
19
4.47%
2
10.00%
Grygorii Strashko
18
4.24%
2
10.00%
Ard Biesheuvel
16
3.76%
1
5.00%
Tang Chen
12
2.82%
1
5.00%
zijun_hu
12
2.82%
2
10.00%
David S. Miller
10
2.35%
2
10.00%
Benjamin Herrenschmidt
10
2.35%
3
15.00%
Michael Ellerman
1
0.24%
1
5.00%
Paul Mackerras
1
0.24%
1
5.00%
Total
425
100.00%
20
100.00%

#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
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
137
85.62%
1
25.00%
Benjamin Herrenschmidt
23
14.38%
3
75.00%
Total
160
100.00%
4
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Paul Burton
151
92.64%
1
50.00%
AKASHI Takahiro
12
7.36%
1
50.00%
Total
163
100.00%
2
100.00%

/**
 * 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
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
73
82.95%
2
33.33%
Tang Chen
5
5.68%
1
16.67%
Wanpeng Li
5
5.68%
1
16.67%
Benjamin Herrenschmidt
5
5.68%
2
33.33%
Total
88
100.00%
6
100.00%

#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
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
31
36.05%
3
20.00%
Catalin Marinas
14
16.28%
2
13.33%
Benjamin Herrenschmidt
14
16.28%
3
20.00%
Vineet Gupta
8
9.30%
1
6.67%
Akinobu Mita
7
8.14%
1
6.67%
Tony Luck
5
5.81%
1
6.67%
Grygorii Strashko
3
3.49%
2
13.33%
Paul Mackerras
2
2.33%
1
6.67%
David S. Miller
2
2.33%
1
6.67%
Total
86
100.00%
15
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Akinobu Mita
32
86.49%
1
50.00%
Tony Luck
5
13.51%
1
50.00%
Total
37
100.00%
2
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Akinobu Mita
33
86.84%
1
50.00%
Tony Luck
5
13.16%
1
50.00%
Total
38
100.00%
2
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Tony Luck
39
60.00%
2
40.00%
Benjamin Herrenschmidt
14
21.54%
2
40.00%
Tejun Heo
12
18.46%
1
20.00%
Total
65
100.00%
5
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
20
68.97%
2
33.33%
Benjamin Herrenschmidt
6
20.69%
2
33.33%
Tony Luck
2
6.90%
1
16.67%
Grygorii Strashko
1
3.45%
1
16.67%
Total
29
100.00%
6
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
35
71.43%
2
40.00%
Benjamin Herrenschmidt
11
22.45%
2
40.00%
Miles Chen
3
6.12%
1
20.00%
Total
49
100.00%
5
100.00%



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

Contributors
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
19
86.36%
1
33.33%
Benjamin Herrenschmidt
3
13.64%
2
66.67%
Total
22
100.00%
3
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Benjamin Herrenschmidt
43
97.73%
4
80.00%
Tejun Heo
1
2.27%
1
20.00%
Total
44
100.00%
5
100.00%

/**
 * 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
Person
Tokens
Prop
Commits
CommitProp
Santosh Shilimkar
170
70.83%
1
16.67%
Tony Luck
33
13.75%
2
33.33%
Wei Yang
16
6.67%
1
16.67%
Yinghai Lu
14
5.83%
1
16.67%
Grygorii Strashko
7
2.92%
1
16.67%
Total
240
100.00%
6
100.00%

/**
 * 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
Person
Tokens
Prop
Commits
CommitProp
Santosh Shilimkar
71
100.00%
1
100.00%
Total
71
100.00%
1
100.00%

/**
 * 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
Person
Tokens
Prop
Commits
CommitProp
Santosh Shilimkar
115
100.00%
1
100.00%
Total
115
100.00%
1
100.00%

/**
 * __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
Person
Tokens
Prop
Commits
CommitProp
Santosh Shilimkar
56
96.55%
1
33.33%
Philipp Hachtmann
1
1.72%
1
33.33%
Catalin Marinas
1
1.72%
1
33.33%
Total
58
100.00%
3
100.00%

/*
 * __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
Person
Tokens
Prop
Commits
CommitProp
Santosh Shilimkar
91
96.81%
1
33.33%
Mel Gorman
2
2.13%
1
33.33%
Catalin Marinas
1
1.06%
1
33.33%
Total
94
100.00%
3
100.00%

/*
 * Remaining API functions
 */



phys_addr_t __init_memblock memblock_phys_mem_size(void)
{
	return memblock.memory.total_size;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Paul Mackerras
8
53.33%
1
20.00%
Tejun Heo
3
20.00%
1
20.00%
Yinghai Lu
2
13.33%
1
20.00%
Benjamin Herrenschmidt
1
6.67%
1
20.00%
David Gibson
1
6.67%
1
20.00%
Total
15
100.00%
5
100.00%



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

Contributors
Person
Tokens
Prop
Commits
CommitProp
Srikar Dronamraju
15
100.00%
1
100.00%
Total
15
100.00%
1
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Yinghai Lu
80
96.39%
1
50.00%
Fabian Frederick
3
3.61%
1
50.00%
Total
83
100.00%
2
100.00%

/* lowest address */


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

Contributors
Person
Tokens
Prop
Commits
CommitProp
Sam Ravnborg
20
100.00%
1
100.00%
Total
20
100.00%
1
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Paul Mackerras
36
81.82%
1
20.00%
Yinghai Lu
5
11.36%
2
40.00%
Benjamin Herrenschmidt
3
6.82%
2
40.00%
Total
44
100.00%
5
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
24
40.00%
1
14.29%
Paul Mackerras
12
20.00%
1
14.29%
Emil Medve
11
18.33%
1
14.29%
Dennis Chen
9
15.00%
1
14.29%
Benjamin Herrenschmidt
2
3.33%
1
14.29%
David S. Miller
1
1.67%
1
14.29%
Michael Ellerman
1
1.67%
1
14.29%
Total
60
100.00%
7
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Dennis Chen
40
55.56%
1
16.67%
Tejun Heo
15
20.83%
1
16.67%
Michael Ellerman
12
16.67%
1
16.67%
Philipp Hachtmann
2
2.78%
1
16.67%
Yinghai Lu
2
2.78%
1
16.67%
Paul Mackerras
1
1.39%
1
16.67%
Total
72
100.00%
6
100.00%



void __init memblock_mem_limit_remove_map(phys_addr_t limit)
{
	struct memblock_type *type = &memblock.memory;
	phys_addr_t max_addr;
	int i, ret, start_rgn, end_rgn;

	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;

	ret = memblock_isolate_range(type, max_addr, (phys_addr_t)ULLONG_MAX,
				&start_rgn, &end_rgn);
	if (ret)
		return;

	/* remove all the MAP regions above the limit */
	for (i = end_rgn - 1; i >= start_rgn; i--) {
		if (!memblock_is_nomap(&type->regions[i]))
			memblock_remove_region(type, i);
	}
	/* truncate the reserved regions */
	memblock_remove_range(&memblock.reserved, max_addr,
			      (phys_addr_t)ULLONG_MAX);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dennis Chen
135
100.00%
1
100.00%
Total
135
100.00%
1
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Benjamin Herrenschmidt
95
90.48%
2
50.00%
Kumar Gala
9
8.57%
1
25.00%
Yinghai Lu
1
0.95%
1
25.00%
Total
105
100.00%
4
100.00%



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

Contributors
Person
Tokens
Prop
Commits
CommitProp
Benjamin Herrenschmidt
19
82.61%
3
50.00%
Kumar Gala
2
8.70%
1
16.67%
Yinghai Lu
1
4.35%
1
16.67%
Yaowei Bai
1
4.35%
1
16.67%
Total
23
100.00%
6
100.00%



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

Contributors
Person
Tokens
Prop
Commits
CommitProp
Benjamin Herrenschmidt
21
91.30%
1
33.33%
Yinghai Lu
1
4.35%
1
33.33%
Yaowei Bai
1
4.35%
1
33.33%
Total
23
100.00%
3
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Ard Biesheuvel
47
100.00%
1
100.00%
Total
47
100.00%
1
100.00%

#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
Person
Tokens
Prop
Commits
CommitProp
Yinghai Lu
94
91.26%
1
33.33%
Fabian Frederick
9
8.74%
2
66.67%
Total
103
100.00%
3
100.00%

#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
Person
Tokens
Prop
Commits
CommitProp
Benjamin Herrenschmidt
57
76.00%
1
25.00%
Tejun Heo
14
18.67%
1
25.00%
Tomi Valkeinen
3
4.00%
1
25.00%
Yinghai Lu
1
1.33%
1
25.00%
Total
75
100.00%
4
100.00%

/**
 * 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
Person
Tokens
Prop
Commits
CommitProp
Benjamin Herrenschmidt
23
69.70%
1
25.00%
Tejun Heo
8
24.24%
1
25.00%
Yinghai Lu
1
3.03%
1
25.00%
Tang Chen
1
3.03%
1
25.00%
Total
33
100.00%
4
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Yinghai Lu
95
79.17%
1
50.00%
Emil Medve
25
20.83%
1
50.00%
Total
120
100.00%
2
100.00%



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

Contributors
Person
Tokens
Prop
Commits
CommitProp
Benjamin Herrenschmidt
14
93.33%
1
50.00%
Yinghai Lu
1
6.67%
1
50.00%
Total
15
100.00%
2
100.00%



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

Contributors
Person
Tokens
Prop
Commits
CommitProp
Laura Abbott
13
100.00%
1
100.00%
Total
13
100.00%
1
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
48
34.04%
1
12.50%
Benjamin Herrenschmidt
47
33.33%
2
25.00%
Miles Chen
16
11.35%
1
12.50%
Alexander Kuleshov
13
9.22%
1
12.50%
Tang Chen
12
8.51%
1
12.50%
Heiko Carstens
4
2.84%
1
12.50%
Yinghai Lu
1
0.71%
1
12.50%
Total
141
100.00%
8
100.00%



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
Person
Tokens
Prop
Commits
CommitProp
Benjamin Herrenschmidt
33
54.10%
2
25.00%
Heiko Carstens
13
21.31%
1
12.50%
Tejun Heo
10
16.39%
2
25.00%
Miles Chen
3
4.92%
1
12.50%
Yinghai Lu
1
1.64%
1
12.50%
Kumar Gala
1
1.64%
1
12.50%
Total
61
100.00%
8
100.00%



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

Contributors
Person
Tokens
Prop
Commits
CommitProp
Benjamin Herrenschmidt
11
91.67%
4
80.00%
Tejun Heo
1
8.33%
1
20.00%
Total
12
100.00%
5
100.00%



static int __init early_memblock(char *p)
{
	if (p && strstr(p, "debug"))
		memblock_debug = 1;
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Benjamin Herrenschmidt
29
100.00%
1
100.00%
Total
29
100.00%
1
100.00%

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
Person
Tokens
Prop
Commits
CommitProp
Benjamin Herrenschmidt
84
83.17%
1
50.00%
Miles Chen
17
16.83%
1
50.00%
Total
101
100.00%
2
100.00%



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

Contributors
Person
Tokens
Prop
Commits
CommitProp
Benjamin Herrenschmidt
28
100.00%
1
100.00%
Total
28
100.00%
1
100.00%


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
Person
Tokens
Prop
Commits
CommitProp
Benjamin Herrenschmidt
67
75.28%
1
50.00%
Philipp Hachtmann
22
24.72%
1
50.00%
Total
89
100.00%
2
100.00%


__initcall(memblock_init_debugfs);

#endif /* CONFIG_DEBUG_FS */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Tejun Heo
1850
27.71%
21
15.44%
Benjamin Herrenschmidt
1154
17.29%
17
12.50%
Tang Chen
551
8.25%
9
6.62%
Santosh Shilimkar
514
7.70%
1
0.74%
Yinghai Lu
434
6.50%
11
8.09%
Philipp Hachtmann
350
5.24%
4
2.94%
Tony Luck
296
4.43%
3
2.21%
Paul Mackerras
202
3.03%
2
1.47%
Dennis Chen
184
2.76%
1
0.74%
Paul Burton
151
2.26%
1
0.74%
Ard Biesheuvel
104
1.56%
1
0.74%
Robin Holt
99
1.48%
1
0.74%
Alexander Kuleshov
94
1.41%
10
7.35%
Miles Chen
76
1.14%
1
0.74%
Gavin Shan
76
1.14%
2
1.47%
Akinobu Mita
72
1.08%
1
0.74%
Greg Pearson
61
0.91%
1
0.74%
Grygorii Strashko
60
0.90%
5
3.68%
Heiko Carstens
42
0.63%
2
1.47%
Wei Yang
40
0.60%
3
2.21%
Emil Medve
36
0.54%
1
0.74%
Catalin Marinas
23
0.34%
2
1.47%
Kumar Gala
21
0.31%
2
1.47%
Sam Ravnborg
21
0.31%
1
0.74%
Michael Ellerman
17
0.25%
3
2.21%
David S. Miller
15
0.22%
6
4.41%
Srikar Dronamraju
15
0.22%
1
0.74%
Badari Pulavarty
14
0.21%
1
0.74%
Laura Abbott
13
0.19%
1
0.74%
Fabian Frederick
12
0.18%
2
1.47%
zijun_hu
12
0.18%
2
1.47%
AKASHI Takahiro
12
0.18%
1
0.74%
Xishi Qiu
12
0.18%
1
0.74%
nimisolo
8
0.12%
1
0.74%
Vineet Gupta
8
0.12%
1
0.74%
Wanpeng Li
5
0.07%
1
0.74%
Andrew Morton
5
0.07%
1
0.74%
David Gibson
3
0.04%
2
1.47%
Tomi Valkeinen
3
0.04%
1
0.74%
Mel Gorman
2
0.03%
1
0.74%
Lin Feng
2
0.03%
1
0.74%
Yaowei Bai
2
0.03%
1
0.74%
Stephen Boyd
1
0.01%
1
0.74%
Christoph Hellwig
1
0.01%
1
0.74%
Joe Perches
1
0.01%
1
0.74%
Sachin Kamat
1
0.01%
1
0.74%
Manish Ahuja
1
0.01%
1
0.74%
Total
6676
100.00%
136
100.00%
Directory: mm

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.