---
id: pr-vllm-12218
repo: vllm-project/vllm
pr: 12218
title: '[Misc] Pass `attention` to impl backend'
author: wangxiyuan
date: '2025-01-20'
url: https://github.com/vllm-project/vllm/pull/12218
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 86bfb6dba7c6e0650e7d7498cbd46b49155b2a42
inclusion_reason: defer
changed_paths:
- vllm/attention/backends/abstract.py
- vllm/attention/backends/blocksparse_attn.py
- vllm/attention/backends/flash_attn.py
- vllm/attention/backends/flashinfer.py
- vllm/attention/backends/hpu_attn.py
- vllm/attention/backends/ipex_attn.py
- vllm/attention/backends/pallas.py
- vllm/attention/backends/rocm_flash_attn.py
- vllm/attention/backends/torch_sdpa.py
- vllm/attention/backends/xformers.py
- vllm/attention/layer.py
- vllm/v1/attention/backends/flash_attn.py
artifact_dir: evidence/pull-bundles/vllm/gh-12218
head_ref_oid: 1cb9ccdb39d73f26039f81431666cb1ae6cf231f
---
# [Misc] Pass `attention` to impl backend

- Repository: `vllm-project/vllm`
- PR: [12218](https://github.com/vllm-project/vllm/pull/12218)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `vllm/attention/backends/abstract.py`
- `vllm/attention/backends/blocksparse_attn.py`
- `vllm/attention/backends/flash_attn.py`
- `vllm/attention/backends/flashinfer.py`
- `vllm/attention/backends/hpu_attn.py`
- `vllm/attention/backends/ipex_attn.py`
- `vllm/attention/backends/pallas.py`
- `vllm/attention/backends/rocm_flash_attn.py`
- `vllm/attention/backends/torch_sdpa.py`
- `vllm/attention/backends/xformers.py`
- `vllm/attention/layer.py`
- `vllm/v1/attention/backends/flash_attn.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-12218`
