如何在Linux内核模块中分配1GB HugePages支持的DMA缓冲区？

I'm trying to allocate a DMA buffer for a HPC workload. It requires 64GB of buffer space. In between computation, some data is offloaded to a PCIe card. Rather than copy data into a bunch of dinky 4MB buffers given by pci_alloc_consistent, I would like to just create 64 1GB buffers, backed by 1GB HugePages.I'm trying to allocate a DMA buffer for a HPC w