Basically, I am referring to AMD SME and SEV supported platforms which keep all the data residing in memory in encrypted form. I am using AMD EPYC 7452 platform with Mellanox ConnectX-5 NIC and MLNX_OFED_LINUX-5.0-188.8.131.52 driver. I have found that simple rdma applications like rping do not work when encryption is enabled on this platform. For DMA to work on this platform, I assume that the device driver needs to be aware that the memory its accessing is in encrypted form. I wonder if Mellanox’s driver take that into account and if there is a specific configuration that I am missing.