Function mla_paged_decode_nvfp4 

pub fn mla_paged_decode_nvfp4(
    gpu: &dyn GpuBackend,
    kernel: KernelHandle,
    q: DevicePtr,
    k_cache: DevicePtr,
    v_cache: DevicePtr,
    o: DevicePtr,
    block_tables: DevicePtr,
    seq_lens: DevicePtr,
    max_blocks_per_seq: u32,
    num_q_heads: u32,
    num_kv_heads: u32,
    q_head_dim: u32,
    kv_cache_dim: u32,
    block_size: u32,
    inv_sqrt_d: f32,
    block_stride_bytes: u64,
    data_section_bytes: u64,
    num_seqs: u32,
    stream: u64,
) -> Result<()>

2026-09-25: MLA paged decode for DeepSeek-V4-Flash over an NVFP4 cache (kernel mla_paged_decode_nvfp4). A cache token is kv_lora_rank + qk_rope_head_dim = 512 + 64 = 576 values (MLA_CACHE_DIM in the kernel); each block holds packed E2M1 data (data_section_bytes) followed by one FP8 E4M3 scale per 16 values.