---
id: pr-sglang-22051
repo: sgl-project/sglang
pr: 22051
title: '[MUSA][9/N] Add FA3 attention backend support through MATE (MUSA AI Tensor Engine)'
author: froststeam
date: '2026-04-10'
url: https://github.com/sgl-project/sglang/pull/22051
source_category: upstream-code
architectures:
- sm100
tags:
- attention
techniques: []
hardware_features: []
kernel_types:
- attention
languages:
- python
captured_at: '2026-04-17'
status: merged
merge_sha: f7a1740101273f5f171c1acd67a58918a1c85599
inclusion_reason: kernel file changes
changed_paths:
- python/pyproject_other.toml
- python/sglang/srt/configs/model_config.py
- python/sglang/srt/environ.py
- python/sglang/srt/hardware_backend/musa/__init__.py
- python/sglang/srt/hardware_backend/musa/attention/__init__.py
- python/sglang/srt/hardware_backend/musa/attention/flashattention_backend.py
- python/sglang/srt/layers/attention/attention_registry.py
- python/sglang/srt/server_args.py
head_ref_oid: 782afec34c47a49ccda26edb5b1e1384ce133346
artifact_dir: evidence/pull-bundles/sglang/gh-22051
---
# [MUSA][9/N] Add FA3 attention backend support through MATE (MUSA AI Tensor Engine)

- Repository: `sgl-project/sglang`
- PR: [22051](https://github.com/sgl-project/sglang/pull/22051)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `python/pyproject_other.toml`
- `python/sglang/srt/configs/model_config.py`
- `python/sglang/srt/environ.py`
- `python/sglang/srt/hardware_backend/musa/__init__.py`
- `python/sglang/srt/hardware_backend/musa/attention/__init__.py`
- `python/sglang/srt/hardware_backend/musa/attention/flashattention_backend.py`
- `python/sglang/srt/layers/attention/attention_registry.py`
- `python/sglang/srt/server_args.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-22051`
