---
id: pr-vllm-31406
repo: vllm-project/vllm
pr: 31406
title: '[v1] Add encoder-only/cross attention support to Triton Attention backend'
author: Isotr0py
date: '2026-01-05'
url: https://github.com/vllm-project/vllm/pull/31406
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 6aa5b18e1dfd9c678fcdd12ca8b954343eb373eb
inclusion_reason: defer
changed_paths:
- tests/kernels/attention/test_triton_prefill_attention.py
- tests/models/multimodal/generation/test_whisper.py
- tests/v1/attention/test_attention_backends.py
- vllm/attention/ops/triton_prefill_attention.py
- vllm/platforms/rocm.py
- vllm/v1/attention/backends/triton_attn.py
artifact_dir: evidence/pull-bundles/vllm/gh-31406
head_ref_oid: 43f151e25ffbbb44fe99fac1b2aee6bddd8d21be
---
# [v1] Add encoder-only/cross attention support to Triton Attention backend

- Repository: `vllm-project/vllm`
- PR: [31406](https://github.com/vllm-project/vllm/pull/31406)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `tests/kernels/attention/test_triton_prefill_attention.py`
- `tests/models/multimodal/generation/test_whisper.py`
- `tests/v1/attention/test_attention_backends.py`
- `vllm/attention/ops/triton_prefill_attention.py`
- `vllm/platforms/rocm.py`
- `vllm/v1/attention/backends/triton_attn.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-31406`
