---
id: pr-flashinfer-2047
repo: flashinfer-ai/flashinfer
pr: 2047
title: Rebase FP8 SM100 Cutlass FMHA Attention to main (original PR#1238)
author: pavanimajety
date: '2025-12-17'
url: https://github.com/flashinfer-ai/flashinfer/pull/2047
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- flash-attention
- fp8
- prefill
- tma
techniques: []
hardware_features:
- fp8
- tma
kernel_types:
- attention
- flash-attention
- prefill
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: db2aacbd301beb7ed69605777a663392e1d8a77f
inclusion_reason: kernel file changes
changed_paths:
- benchmarks/bench_blackwell_attention.py
- csrc/fmha_cutlass_sm100.cu
- csrc/fmha_cutlass_sm100_binding.cu
- flashinfer/prefill.py
- include/flashinfer/attention/blackwell/collective/sm100_fmha_fwd_mainloop_tma_warpspecialized.hpp
- include/flashinfer/attention/blackwell/fmha_cutlass_sm100.cuh
- include/flashinfer/attention/blackwell/kernel/sm100_fmha_fwd_kernel_tma_warpspecialized.hpp
- tests/attention/test_blackwell_fmha.py
head_ref_oid: c91093d3abf362c0e9f8296c0290ac249d2eddf6
artifact_dir: evidence/pull-bundles/flashinfer/gh-2047
---
# Rebase FP8 SM100 Cutlass FMHA Attention to main (original PR#1238)

- Repository: `flashinfer-ai/flashinfer`
- PR: [2047](https://github.com/flashinfer-ai/flashinfer/pull/2047)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `benchmarks/bench_blackwell_attention.py`
- `csrc/fmha_cutlass_sm100.cu`
- `csrc/fmha_cutlass_sm100_binding.cu`
- `flashinfer/prefill.py`
- `include/flashinfer/attention/blackwell/collective/sm100_fmha_fwd_mainloop_tma_warpspecialized.hpp`
- `include/flashinfer/attention/blackwell/fmha_cutlass_sm100.cuh`
- `include/flashinfer/attention/blackwell/kernel/sm100_fmha_fwd_kernel_tma_warpspecialized.hpp`
- `tests/attention/test_blackwell_fmha.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-2047`
