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CUDA: extend K-type validation to V-types for flash attention (#24403)
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* CUDA: extend K-type validation to V-types for flash attention

* reorder
This commit is contained in:
Alexey Kopytko 2026-07-06 23:26:50 +09:00 • committed by GitHub
parent bfdf581b8b
commit cb295bf596
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GPG key ID: B5690EEEBB952194
1 changed files with 22 additions and 16 deletions
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38
ggml/src/ggml-cuda/fattn.cu
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@ -337,6 +337,26 @@ enum best_fattn_kernel {
BEST_FATTN_KERNEL_MMA_F16 = 400,
};
static bool ggml_cuda_fattn_kv_type_supported(ggml_type type) {
switch (type) {
case GGML_TYPE_F32:
case GGML_TYPE_F16:
return true;
case GGML_TYPE_Q4_1:
case GGML_TYPE_Q5_0:
case GGML_TYPE_Q5_1:
#ifndef GGML_CUDA_FA_ALL_QUANTS
return false;
#endif // GGML_CUDA_FA_ALL_QUANTS
case GGML_TYPE_Q4_0:
case GGML_TYPE_Q8_0:
case GGML_TYPE_BF16:
return true;
default:
return false;
}
}
static best_fattn_kernel ggml_cuda_get_best_fattn_kernel(const int device, const ggml_tensor * dst) {
#ifndef FLASH_ATTN_AVAILABLE
GGML_UNUSED(device); GGML_UNUSED(dst);
@ -427,22 +447,8 @@ static best_fattn_kernel ggml_cuda_get_best_fattn_kernel(const int device, const
}
#endif // GGML_CUDA_FA_ALL_QUANTS
switch (K->type) {
case GGML_TYPE_F32:
case GGML_TYPE_F16:
break;
case GGML_TYPE_Q4_1:
case GGML_TYPE_Q5_0:
case GGML_TYPE_Q5_1:
#ifndef GGML_CUDA_FA_ALL_QUANTS
return BEST_FATTN_KERNEL_NONE;
#endif // GGML_CUDA_FA_ALL_QUANTS
case GGML_TYPE_Q4_0:
case GGML_TYPE_Q8_0:
case GGML_TYPE_BF16:
break;
default:
return BEST_FATTN_KERNEL_NONE;
if (!ggml_cuda_fattn_kv_type_supported(K->type) || !ggml_cuda_fattn_kv_type_supported(V->type)) {
return BEST_FATTN_KERNEL_NONE;
}
if (mask && mask->ne[2] != 1) {