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[XPU][DeepSeek-V4] Fix MTP: sync with upstream fixes #44821 and #43746 - #1

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[XPU][DeepSeek-V4] Fix MTP: sync with upstream fixes #44821 and #43746#1
majian4work wants to merge 1353 commits into
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dsv4-pr7-mtp

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Summary

Sync the XPU DeepSeek V4 MTP implementation with two upstream fixes:

  1. fix: prefix DeepSeek V4 MTP projections vllm-project/vllm#44821fix: prefix DeepSeek V4 MTP projections

    • Pass explicit prefix= to e_proj and h_proj ReplicatedLinear layers so compressed-tensors can match artifact-side ignore/target rules.
  2. [Model Refactoring] Remove torch compile dependency in DSv4 vllm-project/vllm#43746[Model Refactoring] Remove torch compile dependency in DSv4

    • Remove @support_torch_compile decorator, align with breakable cudagraph path (via XPUGraph).
    • Use fused Triton kernels from common/ops:
      • fused_mtp_input_rmsnorm — replaces separate mask + enorm + hnorm calls.
      • mtp_shared_head_rmsnorm — replaces SharedHead.forward() in compute_logits.
    • Add missing mhc_post call after mtp_block forward (fixes residual mixing bug).
    • Fix incorrect WEIGHT_NAME_REMAPPING entries referencing non-existent norm_gate.
    • Fix gate.bias remapping path from .ffn.norm_gate.e_score_correction_bias to .ffn.gate.e_score_correction_bias.

Changes

  • vllm/models/deepseek_v4/xpu/mtp.py — all fixes above applied.

Validation

  • No lint/type errors.
  • Diff against NV/AMD versions verified — remaining differences are intentional platform adaptations (no aux streams, HCHeadOp CustomOp dispatch, explicit device placement).

xwu-intel and others added 30 commits June 3, 2026 20:16
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