Workplan task ID: P4-2

Files: tile config table

Description: gfx950 inherits gfx9 non-TrLoad tiles. Add separate arch tag to distinguish gfx950 from gfx9 for TrLoad eligibility.

Example to follow: P3-1 tile config table

CK Tile reference: include/ck_tile/ops/fmha/ (gfx950 path)

CK Tile feature check (required): Before implementing this task, verify the feature is present in the CK Tile source tree in BOTH locations:

• fmha_bwd example — especially codegen: projects/composablekernel/example/ck_tile/01_fmha/codegen/ops/fmha_bwd.py (and supporting host files: fmha_bwd.hpp, fmha_bwd_runner.hpp, example_fmha_bwd.cpp).
• kernels: projects/composablekernel/include/ck_tile/ops/fmha/{kernel,pipeline,block}/.

If the feature is missing or only partially wired in either location, raise it as a blocker before writing the rocm_ck wrapper — the wrapper cannot expose what CK Tile does not implement.

Tests: experimental/rocm_ck/tests/test_fmha_bwd_consteval.cpp

Blocked by: P4-1, P3-1

Source: plans/builder_kpack_fmha/fmha_bwd_feature_gap_workplan.md and progress.md (status as of 2026-05-04).