We couldn't find a way (guest OS with VirtIO drivers) to test
a legacy VirtIO device on a ARM vCPU running in big-endian.

Deprecate for the v11.0 release, giving 1 year to users who
really care to contribute functional tests.

Suggested-by: Alex Bennée <[email protected]>
Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
---
 docs/about/deprecated.rst | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst
index ac31a2bce42..3a69facb0f1 100644
--- a/docs/about/deprecated.rst
+++ b/docs/about/deprecated.rst
@@ -515,6 +515,17 @@ It was implemented as a no-op instruction in TCG up to 
QEMU 9.0, but
 only with ``-cpu max`` (which does not guarantee migration compatibility
 across versions).
 
+VirtIO devices
+''''''''''''''
+
+Legacy VirtIO devices on Big-Endian ARM architecture (since 11.0)
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+There are no functional tests for legacy virtio devices used by ARM
+machines running in big-endian order, which makes harder to maintain
+the code path while the code base evolve.
+
+
 Backwards compatibility
 -----------------------
 
-- 
2.52.0

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