---
id: pr-flashinfer-1567
repo: flashinfer-ai/flashinfer
pr: 1567
title: 'Backend: downgrade trtllm-gen kernel to cuda-12'
author: cyx-6
date: '2025-08-25'
url: https://github.com/flashinfer-ai/flashinfer/pull/1567
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- decode
- flash-attention
- prefill
techniques: []
hardware_features: []
kernel_types:
- attention
- decode
- flash-attention
- prefill
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 27f9c8f381273cd7584cf6f5fbd0cd2d245d6425
inclusion_reason: kernel file changes
changed_paths:
- flashinfer/artifacts.py
- flashinfer/decode.py
- flashinfer/jit/__init__.py
- flashinfer/jit/attention/pytorch.py
- flashinfer/jit/cubin_loader.py
- flashinfer/prefill.py
- include/flashinfer/cubin_loader.h
- include/flashinfer/trtllm/fmha/cubin/kernelMetaInfo.h
- include/flashinfer/trtllm/fmha/fmhaKernels.cuh
- include/flashinfer/trtllm/fmha/kernelParams.h
- tests/test_trtllm_gen_attention.py
head_ref_oid: 7f80ac9d86122ecfb36480d61b24c723f9ea6a20
artifact_dir: evidence/pull-bundles/flashinfer/gh-1567
---
# Backend: downgrade trtllm-gen kernel to cuda-12

- Repository: `flashinfer-ai/flashinfer`
- PR: [1567](https://github.com/flashinfer-ai/flashinfer/pull/1567)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `flashinfer/artifacts.py`
- `flashinfer/decode.py`
- `flashinfer/jit/__init__.py`
- `flashinfer/jit/attention/pytorch.py`
- `flashinfer/jit/cubin_loader.py`
- `flashinfer/prefill.py`
- `include/flashinfer/cubin_loader.h`
- `include/flashinfer/trtllm/fmha/cubin/kernelMetaInfo.h`
- `include/flashinfer/trtllm/fmha/fmhaKernels.cuh`
- `include/flashinfer/trtllm/fmha/kernelParams.h`
- `tests/test_trtllm_gen_attention.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-1567`
