memory: expose alignment used for allocating RAM as MemoryRegion API

[qemu.git] / util / oslib-posix.c

diff --git a/util/oslib-posix.c b/util/oslib-posix.c
index 8c9d80e9fe50002fc6b3a944d896547f89c9c3ec..16fcec2f37e40b94ccc8f7af0ebdaa74f6657af2 100644 (file)
--- a/util/oslib-posix.c
+++ b/util/oslib-posix.c
@@ -124,7 +124,7 @@ void *qemu_memalign(size_t alignment, size_t size)
 }
 
 /* alloc shared memory pages */
-void *qemu_anon_ram_alloc(size_t size)
+void *qemu_anon_ram_alloc(size_t size, uint64_t *alignment)
 {
     size_t align = QEMU_VMALLOC_ALIGN;
     size_t total = size + align - getpagesize();
@@ -136,6 +136,9 @@ void *qemu_anon_ram_alloc(size_t size)
         return NULL;
     }
 
+    if (alignment) {
+        *alignment = align;
+    }
     ptr += offset;
     total -= offset;