---
id: pr-vllm-25507
repo: vllm-project/vllm
pr: 25507
title: '[ROCm] Split AITER unified attention into its own backend'
author: gshtras
date: '2025-10-06'
url: https://github.com/vllm-project/vllm/pull/25507
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: f231e5bc21d5c972bffe3aae286c0102c5623e48
inclusion_reason: defer
changed_paths:
- tests/compile/test_fusion_attn.py
- vllm/attention/backends/registry.py
- vllm/attention/selector.py
- vllm/engine/arg_utils.py
- vllm/envs.py
- vllm/platforms/rocm.py
- vllm/v1/attention/backends/rocm_aiter_unified_attn.py
- vllm/v1/attention/backends/rocm_attn.py
artifact_dir: evidence/pull-bundles/vllm/gh-25507
head_ref_oid: cad76690ad59b5e79e400f5045752ab9f16db7b3
---
# [ROCm] Split AITER unified attention into its own backend

- Repository: `vllm-project/vllm`
- PR: [25507](https://github.com/vllm-project/vllm/pull/25507)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `tests/compile/test_fusion_attn.py`
- `vllm/attention/backends/registry.py`
- `vllm/attention/selector.py`
- `vllm/engine/arg_utils.py`
- `vllm/envs.py`
- `vllm/platforms/rocm.py`
- `vllm/v1/attention/backends/rocm_aiter_unified_attn.py`
- `vllm/v1/attention/backends/rocm_attn.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-25507`
