This introduces memblock_alloc_range() which allocates memblock from
the specified range of physical address. I would like to use this
function to specify the location of CMA.
Cc: Marek Szyprowski <m.szyprow...@samsung.com>
Cc: Konrad Rzeszutek Wilk <konrad.w...@oracle.com>
Cc: David Woodhouse <dw...@infradead.org>
Cc: Don Dutile <ddut...@redhat.com>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: "H. Peter Anvin" <h...@zytor.com>
Cc: Andi Kleen <a...@firstfloor.org>
Cc: x...@kernel.org
Cc: io...@lists.linux-foundation.org
Signed-off-by: Akinobu Mita <akinobu.m...@gmail.com>
---
New patch from this version
include/linux/memblock.h | 2 ++
mm/memblock.c | 27 ++++++++++++++++++++-------
2 files changed, 22 insertions(+), 7 deletions(-)
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 77c60e5..95e0cfa 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -176,6 +176,8 @@ static inline bool memblock_bottom_up(void) { return false;
}
#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
#define MEMBLOCK_ALLOC_ACCESSIBLE 0
+phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
+ phys_addr_t start, phys_addr_t end);
phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
phys_addr_t max_addr);
phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
diff --git a/mm/memblock.c b/mm/memblock.c
index 53e477b..83b0542 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -864,25 +864,38 @@ int __init_memblock memblock_set_node(phys_addr_t base,
phys_addr_t size,
}
#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
-static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size,
- phys_addr_t align, phys_addr_t max_addr,
- int nid)
+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)
{
phys_addr_t found;
if (WARN_ON(!align))
align = __alignof__(long long);
- /* 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(start, end, size, align, nid);
if (found && !memblock_reserve(found, size))
return found;
return 0;
}
+phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align,
+ phys_addr_t start, phys_addr_t end)
+{
+ return memblock_alloc_range_nid(size, align, start, end, MAX_NUMNODES);
+}
+
+static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size,
+ phys_addr_t align, phys_addr_t max_addr,
+ int nid)
+{
+ /* align @size to avoid excessive fragmentation on reserved array */
+ size = round_up(size, align);
+
+ return memblock_alloc_range_nid(size, align, 0, max_addr, nid);
+}
+
phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int
nid)
{
return memblock_alloc_base_nid(size, align, MEMBLOCK_ALLOC_ACCESSIBLE,
nid);
--
1.8.3.2
--
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