v4.3 update. (#2709)

* v4.3 update.

* Update the cute_dsl_api changelog's doc link

* Update version to 4.3.0

* Update the example link

* Update doc to encourage user to install DSL from requirements.txt

---------

Co-authored-by: Larry Wu <larwu@nvidia.com>

media/docs/pythonDSL/cute_dsl_api/changelog.rst

@@ -2,7 +2,32 @@
 Changelog for CuTe DSL API changes
 ======================================
 
-`4.2.0 <https://github.com/NVIDIA/cutlass/releases/tag/v4.2.0>`_ (2025-09-15)
+`4.3.0 <https://github.com/NVIDIA/cutlass/releases/tree/main>`_ (2025-10-07)
+==============================================================================
+
+* Debuggability improvements:
+  - Supported source location tracking for DSL APIs
+  - Supported dumping PTX and SASS code
+* Remove deprecated ``cutlass.<arch>_utils.SMEM_CAPACITY["<arch_str>"]`` and ``cutlass.utils.ampere_helpers``
+* Support calling nested functions without capturing variables inside dynamic control flow
+* Replace usage of ``cute.arch.barrier`` in examples with corresponding APIs in ``pipeline``
+  - Use ``pipeline.sync`` for simple cases like synchronizing the whole CTA
+  - Use ``pipeline.NamedBarrier`` to customize barriers with different participating threads and barrier id
+* Added new APIs ``repeat`` and ``repeat_as_tuple``
+* Added new APIs ``make_rmem_tensor`` to replace ``make_fragment`` with better naming
+* Added new APIs ``make_rmem_tensor_like`` which create rmem tensor from a tensor using the same shape with compact col-major strides
+* Added ``TmemAllocator`` for allocating tensor memory
+* Updated ``SmemAllocator.allocate`` to support allocation of a single scalar value
+* Fixed ``TensorSSA.reduce`` to support static value as initial value
+* Updated docstring for following APIs to be more concise and easier to understand:
+  - ``make_layout_tv``
+  - ``is_static``
+  - ``PipelineAsync``
+  - ``SmemAllocator``
+* Fixed documentation for ``pipeline``, ``utils`` and ``cute.math``
+
+
+`4.2.0 <https://github.com/NVIDIA/cutlass/releases/tag/v4.2.0>`_ (2025-09-10)
 ==============================================================================
 
 * Added back ``cute.make_tiled_copy`` per the request from community
@@ -40,7 +65,7 @@ Changelog for CuTe DSL API changes
   - Introduce S2T CopyOps in `tcgen05/copy.py <https://github.com/NVIDIA/cutlass/blob/main/python/CuTeDSL/cutlass/cute/nvgpu/tcgen05/copy.py>`_.
   - Introduce BlockScaled layout utilities in `blockscaled_layout.py <https://github.com/NVIDIA/cutlass/blob/main/python/CuTeDSL/cutlass/utils/blockscaled_layout.py>`_ for creating the required scale factor layouts in global memory, shared memory and tensor memory.
 
-* ``cutlass.cute.compile`` now supports compilation options. Refer to `JIT compilation options <https://docs.nvidia.com/cutlass/media/docs/pythonDSL/cute_dsl_general/dsl_jit_compilation_options.html>`_ for more details.
+* ``cutlass.cute.compile`` now supports compilation options. Refer to `JIT compilation options <https://docs.nvidia.com/cutlass/latest/media/docs/pythonDSL/cute_dsl_general/dsl_jit_compilation_options.html>`_ for more details.
 * ``cutlass.cute.testing.assert_`` now works for device JIT function. Specify ``--enable-device-assertions`` as compilation option to enable.
 * ``cutlass.cute.make_tiled_copy`` is now deprecated. Please use ``cutlass.cute.make_tiled_copy_tv`` instead.
 * Shared memory capacity query

media/docs/pythonDSL/cute_dsl_api/cute.rst

@@ -9,3 +9,9 @@ cutlass.cute
    :show-inheritance:
    :special-members: __init__
    :private-members:
+
+.. toctree::
+  :maxdepth: 2
+  :hidden:
+
+  cute_arch

media/docs/pythonDSL/cute_dsl_api/cute_arch.rst

@@ -1,17 +1,18 @@
 .. _cute_arch:
 
-cutlass.cute.arch
-=================
+arch
+====
 
-The ``cute.arch`` module contains wrappers around NVVM-level MLIR Op builders that seamlessly
-inter-operate with the Python types used in CUTLASS Python. Another benefit of wrapping these Op
-builders is that the source location can be tracked with the ``@dsl_user_op`` decorator. Available
-functions include
+The ``cute.arch`` module provides lightweight wrappers for NVVM Operation builders which implement CUDA built-in 
+device functions such as ``thread_idx``. It integrates seamlessly with CuTe DSL types.
 
-- basic API like ``thr_idx``;
-- functions related to the direct management of mbarriers;
-- low-level SMEM management (prefer using the ``SmemAllocator`` class);
-- TMEM management.
+These wrappers enable source location tracking through the ``@dsl_user_op``
+decorator. The module includes the following functionality:
+
+- Core CUDA built-in functions such as ``thread_idx``, ``warp_idx``, ``block_dim``, ``grid_dim``, ``cluster_dim``, and related functions
+- Memory barrier management functions including ``mbarrier_init``, ``mbarrier_arrive``, ``mbarrier_wait``, and associated operations  
+- Low-level shared memory (SMEM) management capabilities, with ``SmemAllocator`` as the recommended interface
+- Low-level tensor memory (TMEM) management capabilities, with ``TmemAllocator`` as the recommended interface
 
 API documentation
 -----------------

media/docs/pythonDSL/cute_dsl_api/pipeline.rst

@@ -0,0 +1,9 @@
+cutlass.pipeline
+================
+
+.. automodule:: cutlass.pipeline
+   :members:
+   :undoc-members:
+   :show-inheritance:
+   :special-members: __init__
+   :private-members:

media/docs/pythonDSL/cute_dsl_api/utils.rst

@@ -1,9 +1,19 @@
 cutlass.utils
 =============
 
+The ``cutlass.utils`` module contains utilities for developing kernels with CuTe DSL.
+
 .. automodule:: cutlass.utils
    :members:
    :undoc-members:
    :show-inheritance:
    :special-members: __init__
    :private-members:
+   :exclude-members: sm90_make_smem_layout_a, sm90_make_smem_layout_b, sm90_make_smem_layout_epi
+
+.. toctree::
+  :maxdepth: 2
+  :hidden:
+
+  utils_sm90
+  utils_sm100

media/docs/pythonDSL/cute_dsl_api/utils_sm100.rst

@@ -0,0 +1,10 @@
+.. _utils_sm100:
+
+Utilities for SM100
+===================
+
+.. automodule:: cutlass.utils.sm100
+   :members:
+   :undoc-members:
+   :show-inheritance:
+   :special-members: __init__

media/docs/pythonDSL/cute_dsl_api/utils_sm90.rst

@@ -0,0 +1,10 @@
+.. _utils_sm90:
+
+Utilities for SM90
+==================
+
+.. automodule:: cutlass.utils.sm90
+   :members:
+   :undoc-members:
+   :show-inheritance:
+   :special-members: __init__