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[Compilation fix] add stubs to allow compilation without sm100 #21198

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[Compilation fix] add stubs to allow compilation without sm100 #21198

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954b5ed
fix: add stubs to allow compilation without sm100
mickaelseznec Jul 18, 2025
79573f5
fix: oopsie
mickaelseznec Jul 18, 2025
8635659
fix: style
mickaelseznec Jul 18, 2025
f2fab0b
fix: typo
mickaelseznec Jul 22, 2025
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16 changes: 16 additions & 0 deletions csrc/attention/mla/cutlass_mla_entry.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,22 @@ void cutlass_mla_decode_sm100a(torch::Tensor const& out,
torch::Tensor const& kv_c_and_k_pe_cache,
torch::Tensor const& seq_lens,
torch::Tensor const& page_table, double scale);
#else
// fallback stubs
void sm100_cutlass_mla_decode(
torch::Tensor const& out, torch::Tensor const& q_nope,
torch::Tensor const& q_pe, torch::Tensor const& kv_c_and_k_pe_cache,
torch::Tensor const& seq_lens, torch::Tensor const& page_table,
torch::Tensor const& workspace, double sm_scale, int64_t num_kv_splits) {
TORCH_CHECK_NOT_IMPLEMENTED(false, "No compiled cutlass MLA");
}

int64_t sm100_cutlass_mla_get_workspace_size(int64_t max_seq_len,
int64_t num_batches,
int64_t sm_count,
int64_t num_kv_splits) {
TORCH_CHECK_NOT_IMPLEMENTED(false, "No compiled cutlass MLA");
}
#endif

void cutlass_mla_decode(torch::Tensor const& out, torch::Tensor const& q_nope,
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