x86, memblock: Add memblock_x86_memory_in_range()

It will return memory size in specified range according to memblock.memory.region

Try to share some code with memblock_x86_free_memory_in_range() by passing get_free to
__memblock_x86_memory_in_range().

-v2: Ben want _in_range in the name instead of size

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 17 insertions, 1 deletions

diff --git a/arch/x86/mm/memblock.c b/arch/x86/mm/memblock.c
index 30d60cf29ce3..32ddad5dc932 100644
--- a/arch/x86/mm/memblock.c
+++ b/arch/x86/mm/memblock.c
@@ -211,7 +211,7 @@ void __init memblock_x86_to_bootmem(u64 start, u64 end)
 }
 #endif
 
-u64 __init memblock_x86_free_memory_in_range(u64 addr, u64 limit)
+static u64 __init __memblock_x86_memory_in_range(u64 addr, u64 limit, bool get_free)
 {
         int i, count;
         struct range *range;
@@ -240,6 +240,10 @@ u64 __init memblock_x86_free_memory_in_range(u64 addr, u64 limit)
         }
         subtract_range(range, count, 0, addr);
         subtract_range(range, count, limit, -1ULL);
+
+        /* Subtract memblock.reserved.region in range ? */
+        if (!get_free)
+                goto sort_and_count_them;
         for_each_memblock(reserved, r) {
                 final_start = PFN_DOWN(r->base);
                 final_end = PFN_UP(r->base + r->size);
@@ -250,6 +254,8 @@ u64 __init memblock_x86_free_memory_in_range(u64 addr, u64 limit)
 
                 subtract_range(range, count, final_start, final_end);
         }
+
+sort_and_count_them:
         nr_range = clean_sort_range(range, count);
 
         free_size = 0;
@@ -259,6 +265,16 @@ u64 __init memblock_x86_free_memory_in_range(u64 addr, u64 limit)
         return free_size << PAGE_SHIFT;
 }
 
+u64 __init memblock_x86_free_memory_in_range(u64 addr, u64 limit)
+{
+        return __memblock_x86_memory_in_range(addr, limit, true);
+}
+
+u64 __init memblock_x86_memory_in_range(u64 addr, u64 limit)
+{
+        return __memblock_x86_memory_in_range(addr, limit, false);
+}
+
 void __init memblock_x86_reserve_range(u64 start, u64 end, char *name)
 {
         if (start == end)