---
id: pr-flashinfer-2477
repo: flashinfer-ai/flashinfer
pr: 2477
title: 'feat: Add TRTLLM-Gen Skip-Softmax kernels for prefill and decode'
author: DomBrown
date: '2026-02-11'
url: https://github.com/flashinfer-ai/flashinfer/pull/2477
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- decode
- flash-attention
- mla
- prefill
- tma
techniques: []
hardware_features:
- tma
kernel_types:
- attention
- decode
- flash-attention
- mla
- prefill
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 09b38254d9c06cd574b273109fadd67c49c23e1a
inclusion_reason: kernel file changes
changed_paths:
- csrc/trtllm_fmha_kernel_launcher.cu
- flashinfer/artifacts.py
- flashinfer/decode.py
- flashinfer/mla.py
- flashinfer/prefill.py
- include/flashinfer/trtllm/fmha/fmhaKernels.cuh
- include/flashinfer/trtllm/fmha/fmhaRunnerParams.h
- include/flashinfer/trtllm/fmha/kernelParams.h
- tests/attention/test_trtllm_gen_attention.py
head_ref_oid: 59172bda6efbcdd041dc40b678144d8e26ba0297
artifact_dir: evidence/pull-bundles/flashinfer/gh-2477
---
# feat: Add TRTLLM-Gen Skip-Softmax kernels for prefill and decode

- Repository: `flashinfer-ai/flashinfer`
- PR: [2477](https://github.com/flashinfer-ai/flashinfer/pull/2477)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `csrc/trtllm_fmha_kernel_launcher.cu`
- `flashinfer/artifacts.py`
- `flashinfer/decode.py`
- `flashinfer/mla.py`
- `flashinfer/prefill.py`
- `include/flashinfer/trtllm/fmha/fmhaKernels.cuh`
- `include/flashinfer/trtllm/fmha/fmhaRunnerParams.h`
- `include/flashinfer/trtllm/fmha/kernelParams.h`
- `tests/attention/test_trtllm_gen_attention.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-2477`
