[PATCH] docs: rust: update description of crates

[Paolo Bonzini]

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 docs/devel/rust.rst | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/docs/devel/rust.rst b/docs/devel/rust.rst
index 7964e1fd327..e3f9e16aacb 100644
--- a/docs/devel/rust.rst
+++ b/docs/devel/rust.rst
@@ -139,16 +139,22 @@ anymore.
 Writing Rust code in QEMU
 -------------------------
 
-Right now QEMU includes three crates:
+Right now QEMU includes four crates:
 
 * ``qemu_api`` for bindings to C code and useful functionality
 
 * ``qemu_api_macros`` defines several procedural macros that are useful when
   writing C code
 
-* ``pl011`` (under ``rust/hw/char/pl011``) is the sample device that is being
-  used to further develop ``qemu_api`` and ``qemu_api_macros``.  It is a 
functional
-  replacement for the ``hw/char/pl011.c`` file.
+* ``pl011`` (under ``rust/hw/char/pl011``) and ``hpet`` (under 
``rust/hw/timer/hpet``)
+  are sample device that demonstrate ``qemu_api`` and ``qemu_api_macros``, and 
are
+  used to further develop them.  These two crates are functional\ [#issues]_ 
replacements
+  for the ``hw/char/pl011.c`` and ``hw/timer/hpet.c`` files.
+
+.. [#issues] The ``pl011`` crate is synchronized with ``hw/char/pl011.c``
+   as of commit 02b1f7f61928.  The ``hpet`` crate is synchronized as of
+   commit f32352ff9e.  Both are lacking tracing functionality; ``hpet``
+   is also lacking support for migration.
 
 This section explains how to work with them.
 
-- 
2.48.1