[Attention][V1] Toggle for v1 attention backend#18275

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gshtras wants to merge 4 commits intovllm-project:mainfrom

ROCm:attention_toggle_upstream

Commits on May 16, 2025

Toggle for v1 attention
gshtras
committed

Commits on May 19, 2025

Commits on May 22, 2025

Better naming and logic extracted to a variable
gshtras
committed