On Thu, Apr 28, 2022 at 03:44:36PM +0100, Robin Murphy wrote: > Rather than introduce this extra level of allocator complexity, how about > just dividing up the initial SWIOTLB allocation into multiple io_tlb_mem > instances? Yeah. We're almost done removing all knowledge of swiotlb from drivers, so the very last thing I want is an interface that allows a driver to allocate a per-device buffer.