---
id: pr-flash-attention-2332
repo: Dao-AILab/flash-attention
pr: 2332
title: '[cutlass] Allow compilation of cutlass FA3 for sm100 via enable_sm90'
author: henrylhtsang
date: '2026-03-12'
url: https://github.com/Dao-AILab/flash-attention/pull/2332
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- blackwell
- cuda kernel
- cutlass
- sm100
- sm80
- sm90
- wgmma
techniques: []
hardware_features:
- blackwell
- hopper
- wgmma
kernel_types:
- attention
languages:
- cuda-cpp
- cute-dsl
captured_at: '2026-05-16'
status: merged
merge_sha: 966c69c31723914e831c64cd0ffb66508dff30b8
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- hopper/flash_bwd_launch_template.h
- hopper/flash_fwd_launch_template.h
- hopper/utils.h
artifact_dir: evidence/pull-bundles/flash-attention/gh-2332
head_ref_oid: 5081de97d34ac0f3c53bc9befb1a60fde608cae2
---
# [cutlass] Allow compilation of cutlass FA3 for sm100 via enable_sm90

- Repository: `Dao-AILab/flash-attention`
- PR: [2332](https://github.com/Dao-AILab/flash-attention/pull/2332)
- Decision: `Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.`
- Reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.

## Changed Paths

- `hopper/flash_bwd_launch_template.h`
- `hopper/flash_fwd_launch_template.h`
- `hopper/utils.h`

## Evidence Bundle

`evidence/pull-bundles/flash-attention/gh-2332`
