---
id: pr-vllm-19492
repo: vllm-project/vllm
pr: 19492
title: '[Bugfix][V1] Allow manual FlashAttention for Blackwell'
author: mgoin
date: '2025-06-12'
url: https://github.com/vllm-project/vllm/pull/19492
source_category: upstream-code
architectures:
- sm100
tags:
- attention
techniques: []
hardware_features: []
kernel_types:
- attention
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: af09b3f0a05479e36bab12ae4e05cbdd3fed9d27
inclusion_reason: semantic match with file changes
changed_paths:
- vllm/platforms/cuda.py
head_ref_oid: f849458105f362af2502c43aa0fedd1a882a5058
artifact_dir: evidence/pull-bundles/vllm/gh-19492
---
# [Bugfix][V1] Allow manual FlashAttention for Blackwell

- Repository: `vllm-project/vllm`
- PR: [19492](https://github.com/vllm-project/vllm/pull/19492)
- Decision: `semantic match with file changes`
- Reason: semantic match with file changes

## Changed Paths

- `vllm/platforms/cuda.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-19492`
