Add an iterator over the sections of a flattened address space.
Signed-off-by: Steve Sistare <steven.sist...@oracle.com>
Reviewed-by: Marc-André Lureau <marcandre.lur...@redhat.com>
---
include/exec/memory.h | 31 +++++++++++++++++++++++++++++++
softmmu/memory.c | 21 +++++++++++++++++++++
2 files changed, 52 insertions(+)
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 7513d04..9629289 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -2346,6 +2346,37 @@ void memory_region_set_ram_discard_manager(MemoryRegion
*mr,
RamDiscardManager *rdm);
/**
+ * memory_region_section_cb: callback for address_space_flat_for_each_section()
+ *
+ * @mrs: MemoryRegionSection of the range
+ * @opaque: data pointer passed to address_space_flat_for_each_section()
+ * @errp: error message, returned to the address_space_flat_for_each_section
+ * caller.
+ *
+ * Returns: non-zero to stop the iteration, and 0 to continue. The same
+ * non-zero value is returned to the address_space_flat_for_each_section
caller.
+ */
+
+typedef int (*memory_region_section_cb)(MemoryRegionSection *mrs,
+ void *opaque,
+ Error **errp);
+
+/**
+ * address_space_flat_for_each_section: walk the ranges in the address space
+ * flat view and call @func for each. Return 0 on success, else return
non-zero
+ * with a message in @errp.
+ *
+ * @as: target address space
+ * @func: callback function
+ * @opaque: passed to @func
+ * @errp: passed to @func
+ */
+int address_space_flat_for_each_section(AddressSpace *as,
+ memory_region_section_cb func,
+ void *opaque,
+ Error **errp);
+
+/**
* memory_region_find: translate an address/size relative to a
* MemoryRegion into a #MemoryRegionSection.
*
diff --git a/softmmu/memory.c b/softmmu/memory.c
index 7ba2048..6aa3a2f 100644
--- a/softmmu/memory.c
+++ b/softmmu/memory.c
@@ -2683,6 +2683,27 @@ bool memory_region_is_mapped(MemoryRegion *mr)
return !!mr->container || mr->mapped_via_alias;
}
+int address_space_flat_for_each_section(AddressSpace *as,
+ memory_region_section_cb func,
+ void *opaque,
+ Error **errp)
+{
+ FlatView *view = address_space_get_flatview(as);
+ FlatRange *fr;
+ int ret;
+
+ FOR_EACH_FLAT_RANGE(fr, view) {
+ MemoryRegionSection mrs = section_from_flat_range(fr, view);
+ ret = func(&mrs, opaque, errp);
+ if (ret) {
+ return ret;
+ }
+ }
+
+ flatview_unref(view);
+ return 0;
+}
+
/* Same as memory_region_find, but it does not add a reference to the
* returned region. It must be called from an RCU critical section.
*/
--
1.8.3.1
