memory: add memory_region_is_rom()

Signed-off-by: Avi Kivity <avi@redhat.com>

2 files changed, 14 insertions, 0 deletions

diff --git a/memory.c b/memory.c
index 4264b42222..01baeacf3c 100644
--- a/memory.c
+++ b/memory.c
@@ -1074,6 +1074,11 @@ bool memory_region_is_ram(MemoryRegion *mr)
     return mr->ram;
 }
 
+bool memory_region_is_rom(MemoryRegion *mr)
+{
+    return mr->ram && mr->readonly;
+}
+
 void memory_region_set_offset(MemoryRegion *mr, target_phys_addr_t offset)
 {
     mr->offset = offset;
diff --git a/memory.h b/memory.h
index dccc9007df..91d6e8aef5 100644
--- a/memory.h
+++ b/memory.h
@@ -277,6 +277,15 @@ uint64_t memory_region_size(MemoryRegion *mr);
 bool memory_region_is_ram(MemoryRegion *mr);
 
 /**
+ * memory_region_is_rom: check whether a memory region is ROM
+ *
+ * Returns %true is a memory region is read-only memory.
+ *
+ * @mr: the memory region being queried
+ */
+bool memory_region_is_rom(MemoryRegion *mr);
+
+/**
  * memory_region_get_ram_ptr: Get a pointer into a RAM memory region.
  *
  * Returns a host pointer to a RAM memory region (created with