20 Nov
2025
20 Nov
'25
1:20 p.m.
On Thu, Nov 20, 2025 at 08:08:27AM +0100, Christian König wrote:
The exporter should be able to decide if it actually wants to use P2P when the transfer has to go through the host bridge (e.g. when IOMMU/bridge routing bits are enabled).
Sure, but this is a simplified helper for exporters that don't have choices where the memory comes from.
That is extremely questionable as justification to put that in common DMA-buf code.
FWIW we already have patches for a RDMA exporter lined up to use it as well. That's two users already...
Jason