---
id: pr-vllm-22703
repo: vllm-project/vllm
pr: 22703
title: '[NVIDIA] Support Flashinfer TRTLLM FP8-q/kv NVFP4-out Attention Kernel'
author: elvischenv
date: '2025-08-22'
url: https://github.com/vllm-project/vllm/pull/22703
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- decode
- fp4
- fp8
- kernel-fusion
- mla
- nvfp4
- prefill
- quantization
techniques:
- kernel-fusion
hardware_features:
- fp4
- fp8
- nvfp4
kernel_types:
- attention
- decode
- mla
- prefill
- quantization
languages:
- triton
captured_at: '2026-04-27'
status: merged
merge_sha: 24d0c9e6edc4299f62053ee0cb0154ce86b08cb8
inclusion_reason: kernel file changes
changed_paths:
- benchmarks/kernels/benchmark_trtllm_decode_attention.py
- benchmarks/kernels/benchmark_trtllm_prefill_attention.py
- tests/compile/test_functionalization.py
- tests/compile/test_fusion.py
- tests/compile/test_fusion_attn.py
- tests/kernels/attention/test_flashinfer_trtllm_attention.py
- vllm/attention/backends/abstract.py
- vllm/attention/backends/differential_flash_attn.py
- vllm/attention/backends/dual_chunk_flash_attn.py
- vllm/attention/backends/flash_attn.py
- vllm/attention/backends/mla/common.py
- vllm/attention/backends/rocm_flash_attn.py
- vllm/attention/backends/xformers.py
- vllm/attention/layer.py
- vllm/compilation/fusion.py
- vllm/compilation/fusion_attn.py
- vllm/model_executor/layers/quantization/utils/quant_utils.py
- vllm/v1/attention/backends/cpu_attn.py
- vllm/v1/attention/backends/flash_attn.py
- vllm/v1/attention/backends/flashinfer.py
- vllm/v1/attention/backends/flex_attention.py
- vllm/v1/attention/backends/mla/common.py
- vllm/v1/attention/backends/pallas.py
- vllm/v1/attention/backends/rocm_aiter_fa.py
- vllm/v1/attention/backends/tree_attn.py
- vllm/v1/attention/backends/triton_attn.py
- vllm/v1/attention/backends/xformers.py
head_ref_oid: 813eb13d6b01978d454bed9a025e3abe0f5632bc
artifact_dir: evidence/pull-bundles/vllm/gh-22703
---
# [NVIDIA] Support Flashinfer TRTLLM FP8-q/kv NVFP4-out Attention Kernel

- Repository: `vllm-project/vllm`
- PR: [22703](https://github.com/vllm-project/vllm/pull/22703)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `benchmarks/kernels/benchmark_trtllm_decode_attention.py`
- `benchmarks/kernels/benchmark_trtllm_prefill_attention.py`
- `tests/compile/test_functionalization.py`
- `tests/compile/test_fusion.py`
- `tests/compile/test_fusion_attn.py`
- `tests/kernels/attention/test_flashinfer_trtllm_attention.py`
- `vllm/attention/backends/abstract.py`
- `vllm/attention/backends/differential_flash_attn.py`
- `vllm/attention/backends/dual_chunk_flash_attn.py`
- `vllm/attention/backends/flash_attn.py`
- `vllm/attention/backends/mla/common.py`
- `vllm/attention/backends/rocm_flash_attn.py`
- `vllm/attention/backends/xformers.py`
- `vllm/attention/layer.py`
- `vllm/compilation/fusion.py`
- `vllm/compilation/fusion_attn.py`
- `vllm/model_executor/layers/quantization/utils/quant_utils.py`
- `vllm/v1/attention/backends/cpu_attn.py`
- `vllm/v1/attention/backends/flash_attn.py`
- `vllm/v1/attention/backends/flashinfer.py`
- `vllm/v1/attention/backends/flex_attention.py`
- `vllm/v1/attention/backends/mla/common.py`
- `vllm/v1/attention/backends/pallas.py`
- `vllm/v1/attention/backends/rocm_aiter_fa.py`
- `vllm/v1/attention/backends/tree_attn.py`
- `vllm/v1/attention/backends/triton_attn.py`
- `vllm/v1/attention/backends/xformers.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-22703`
