feat: SM120 (Blackwell Desktop) support for DeepSeek-V4 inference#24692

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AliceChenyy wants to merge 16 commits into

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AliceChenyy:sm120-dsv4-rebase

Commits on May 20, 2026

feat: SM120 (Blackwell Desktop) support for DeepSeek-V4 inference

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fix: address PR review comments and handle KV cache uint8 dtype on SM120

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style: fix pre-commit lint issues (isort, ruff, black)

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fix: wrap pytest.main in sys.exit for CI exit code propagation

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fix: add SM120 guards for sgl-kernel 0.4.2.post2 compatibility

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fix: remove _is_sm120 module var from metadata.py, use is_sm120_supported() directly

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refactor: simplify _is_sm120 by using is_sm120_supported() directly

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fix: replace broken _is_sm120 import in indexer.py with is_sm120_supported()

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style: remove unused imports flagged by ruff (rotate_activation, act_quant)

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Merge remote-tracking branch 'origin/main' into sm120-dsv4-rebase
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fix: rename nsa_ to dsa_ in SM120 backend defaults after NSA→DSA refactor

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test: register SM120 MQA fallback tests in CI (base-b, 1-gpu-small)

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