The Linux kernel has long honored the “nordrand” kernel parameter to disable kernel use of the Intel RDRAND and RDSEED instructions if not trusting them — either out of security concerns that they could be compromised by the vendor or running into hardware/firmware issues around RdRand usage. But the Linux kernel is preparing to drop that kernel parameter with users encouraged to use the more generic “random.trust_cpu” parameter…

Source: Phoronix – Linux To Drop “nordrand” Option – Users Should Instead Switch To “random.trust_cpu”