#include <linux/memblock.h>
#include <asm-generic/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;
};
int memblock_debug __initdata_memblock;
+#ifdef CONFIG_MOVABLE_NODE
+bool movable_node_enabled __initdata_memblock = false;
+#endif
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;
* @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, %MAX_NUMNODES for any node
+ * @nid: nid of the free area to find, %NUMA_NO_NODE for any node
*
* Utility called from memblock_find_in_range_node(), find free area bottom-up.
*
* @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, %MAX_NUMNODES for any node
+ * @nid: nid of the free area to find, %NUMA_NO_NODE for any node
*
* Utility called from memblock_find_in_range_node(), find free area top-down.
*
/**
* memblock_find_in_range_node - find free area in given range and node
- * @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, %MAX_NUMNODES for any node
+ * @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
*
* Find @size free area aligned to @align in the specified range and node.
*
* RETURNS:
* Found address on success, 0 on failure.
*/
-phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t start,
- phys_addr_t end, phys_addr_t size,
- phys_addr_t align, int nid)
+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)
{
int ret;
phys_addr_t kernel_end;
phys_addr_t end, phys_addr_t size,
phys_addr_t align)
{
- return memblock_find_in_range_node(start, end, size, align,
- MAX_NUMNODES);
+ return memblock_find_in_range_node(size, align, start, end,
+ NUMA_NO_NODE);
}
static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r)
if (memblock.reserved.regions == memblock_reserved_init_regions)
return 0;
+ /*
+ * Don't allow nobootmem allocator to free reserved memory regions
+ * array if
+ * - CONFIG_DEBUG_FS is enabled;
+ * - CONFIG_ARCH_DISCARD_MEMBLOCK is not enabled;
+ * - reserved memory regions array have been resized during boot.
+ * Otherwise debug_fs entry "sys/kernel/debug/memblock/reserved"
+ * will show garbage instead of state of memory reservations.
+ */
+ if (IS_ENABLED(CONFIG_DEBUG_FS) &&
+ !IS_ENABLED(CONFIG_ARCH_DISCARD_MEMBLOCK))
+ return 0;
+
*addr = __pa(memblock.reserved.regions);
return PAGE_ALIGN(sizeof(struct memblock_region) *
return memblock_reserve_region(base, size, MAX_NUMNODES, 0);
}
+/**
+ * memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG.
+ * @base: the base phys addr of the region
+ * @size: the size of the region
+ *
+ * This function isolates region [@base, @base + @size), and mark it with flag
+ * MEMBLOCK_HOTPLUG.
+ *
+ * Return 0 on succees, -errno on failure.
+ */
+int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size)
+{
+ 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++)
+ memblock_set_region_flags(&type->regions[i], MEMBLOCK_HOTPLUG);
+
+ memblock_merge_regions(type);
+ return 0;
+}
+
+/**
+ * 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
+ *
+ * This function isolates region [@base, @base + @size), and clear flag
+ * MEMBLOCK_HOTPLUG for the isolated regions.
+ *
+ * Return 0 on succees, -errno on failure.
+ */
+int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size)
+{
+ 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++)
+ memblock_clear_region_flags(&type->regions[i],
+ MEMBLOCK_HOTPLUG);
+
+ memblock_merge_regions(type);
+ return 0;
+}
+
/**
* __next_free_mem_range - next function for for_each_free_mem_range()
* @idx: pointer to u64 loop variable
- * @nid: node selector, %MAX_NUMNODES for all nodes
+ * @nid: node selector, %NUMA_NO_NODE for all nodes
* @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
int mi = *idx & 0xffffffff;
int ri = *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 ( ; mi < mem->cnt; mi++) {
struct memblock_region *m = &mem->regions[mi];
phys_addr_t m_start = m->base;
phys_addr_t m_end = m->base + m->size;
/* only memory regions are associated with nodes, check it */
- if (nid != MAX_NUMNODES && nid != memblock_get_region_node(m))
+ if (nid != NUMA_NO_NODE && nid != memblock_get_region_node(m))
continue;
/* scan areas before each reservation for intersection */
/**
* __next_free_mem_range_rev - next function for for_each_free_mem_range_reverse()
* @idx: pointer to u64 loop variable
- * @nid: nid: node selector, %MAX_NUMNODES for all nodes
+ * @nid: nid: node selector, %NUMA_NO_NODE for all nodes
* @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_free_mem_range().
+ *
+ * Linux kernel cannot migrate pages used by itself. Memory hotplug users won't
+ * be able to hot-remove hotpluggable memory used by the kernel. So this
+ * function skip hotpluggable regions if needed when allocating memory for the
+ * kernel.
*/
void __init_memblock __next_free_mem_range_rev(u64 *idx, int nid,
phys_addr_t *out_start,
int mi = *idx & 0xffffffff;
int ri = *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) {
mi = mem->cnt - 1;
ri = rsv->cnt;
phys_addr_t m_end = m->base + m->size;
/* only memory regions are associated with nodes, check it */
- if (nid != MAX_NUMNODES && nid != memblock_get_region_node(m))
+ if (nid != NUMA_NO_NODE && nid != memblock_get_region_node(m))
+ continue;
+
+ /* skip hotpluggable memory regions if needed */
+ if (movable_node_is_enabled() && memblock_is_hotpluggable(m))
continue;
/* scan areas before each reservation for intersection */
* 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 memory regions in [@base,@base+@size) to @nid.
+ * 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,
- int nid)
+ struct memblock_type *type, int nid)
{
- struct memblock_type *type = &memblock.memory;
int start_rgn, end_rgn;
int i, ret;
{
phys_addr_t found;
- if (WARN_ON(!align))
- align = __alignof__(long long);
+ if (!align)
+ align = SMP_CACHE_BYTES;
/* align @size to avoid excessive fragmentation on reserved array */
size = round_up(size, align);
- found = memblock_find_in_range_node(0, max_addr, size, align, nid);
+ found = memblock_find_in_range_node(size, align, 0, max_addr, nid);
if (found && !memblock_reserve(found, size))
return found;
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, MAX_NUMNODES);
+ return memblock_alloc_base_nid(size, align, max_addr, NUMA_NO_NODE);
}
phys_addr_t __init memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr)
return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE);
}
+/**
+ * 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;
+
+ 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;
+
+ /* align @size to avoid excessive fragmentation on reserved array */
+ size = round_up(size, align);
+
+again:
+ alloc = memblock_find_in_range_node(size, align, min_addr, max_addr,
+ nid);
+ if (alloc)
+ goto done;
+
+ if (nid != NUMA_NO_NODE) {
+ alloc = memblock_find_in_range_node(size, align, min_addr,
+ max_addr, NUMA_NO_NODE);
+ if (alloc)
+ goto done;
+ }
+
+ if (min_addr) {
+ min_addr = 0;
+ goto again;
+ } else {
+ goto error;
+ }
+
+done:
+ memblock_reserve(alloc, size);
+ 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;
+
+error:
+ return NULL;
+}
+
+/**
+ * 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);
+}
+
+/**
+ * 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;
+}
+
+/**
+ * __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(__va(base), size);
+ __memblock_remove(&memblock.reserved, base, size);
+}
+
+/*
+ * __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(__va(base), size);
+ cursor = PFN_UP(base);
+ end = PFN_DOWN(base + size);
+
+ for (; cursor < end; cursor++) {
+ __free_pages_bootmem(pfn_to_page(cursor), 0);
+ totalram_pages++;
+ }
+}
/*
* Remaining API functions
projects / firefly-linux-kernel-4.4.55.git / blobdiff