From: "Dr. David Alan Gilbert" <dgilb...@redhat.com>
Iterate through an address space calling a function for each
section. The iteration is done in order.
Signed-off-by: Dr. David Alan Gilbert <dgilb...@redhat.com>
---
include/exec/memory.h | 23 +++++++++++++++++++++++
memory.c | 22 ++++++++++++++++++++++
2 files changed, 45 insertions(+)
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 5ed4042f87..f5a9df642e 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -1987,6 +1987,29 @@ address_space_write_cached(MemoryRegionCache *cache,
hwaddr addr,
address_space_write(cache->as, cache->xlat + addr, MEMTXATTRS_UNSPECIFIED,
buf, len);
}
+/**
+ * ASIterateCallback: Function type called by address_space_iterate
+ *
+ * Return 0 on success or a negative error code.
+ *
+ * @mrs: Memory region section for this range
+ * @opaque: The opaque value passed in to the iterator.
+ */
+typedef int (*ASIterateCallback)(MemoryRegionSection *mrs, void *opaque);
+
+/**
+ * address_space_iterate: Call the function for each address range in the
+ * AddressSpace, in sorted order.
+ *
+ * Return 0 on success or a negative error code.
+ *
+ * @as: Address space to iterate over
+ * @cb: Function to call. If the function returns none-0 the iteration will
+ * stop.
+ * @opaque: Value to pass to the function
+ */
+int
+address_space_iterate(AddressSpace *as, ASIterateCallback cb, void *opaque);
#endif
#endif
diff --git a/memory.c b/memory.c
index e26e5a3b1d..f45137f25e 100644
--- a/memory.c
+++ b/memory.c
@@ -2810,6 +2810,28 @@ void address_space_destroy(AddressSpace *as)
call_rcu(as, do_address_space_destroy, rcu);
}
+int address_space_iterate(AddressSpace *as, ASIterateCallback cb,
+ void *opaque)
+{
+ int res = 0;
+ FlatView *fv = address_space_to_flatview(as);
+ FlatRange *range;
+
+ flatview_ref(fv);
+
+ FOR_EACH_FLAT_RANGE(range, fv) {
+ MemoryRegionSection mrs = section_from_flat_range(range, fv);
+ res = cb(&mrs, opaque);
+ if (res) {
+ break;
+ }
+ }
+
+ flatview_unref(fv);
+
+ return res;
+}
+
static const char *memory_region_type(MemoryRegion *mr)
{
if (memory_region_is_ram_device(mr)) {
--
2.14.3
