@@ -67,11 +67,15 @@ MemoryRegion):
You initialize a pure container with memory_region_init().
-- alias: a subsection of another region. Aliases allow a region to be
- split apart into discontiguous regions. Examples of uses are memory banks
- used when the guest address space is smaller than the amount of RAM
- addressed, or a memory controller that splits main memory to expose a "PCI
- hole". Aliases may point to any type of region, including other aliases,
+- alias: a subsection of another region. Aliases allow a region to be
+ split apart into discontiguous regions. Examples of uses are memory
+ banks used when the guest address space is smaller than the amount
+ of RAM addressed, or a memory controller that splits main memory to
+ expose a "PCI hole". You can also create aliases to avoid trying to
+ add the original region to multiple parents via
+ `memory_region_add_subregion`.
+
+ Aliases may point to any type of region, including other aliases,
but an alias may not point back to itself, directly or indirectly.
You initialize these with memory_region_init_alias().
We do mention the limitation of single parenthood for memory_region_add_subregion but lets also make it clear how aliases help solve that conundrum. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> --- docs/devel/memory.rst | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-)