https://www.zdnet.com/article/linux-kernel-5-18-arrives-heres-whats-new/ https://github.com/intel/intel-sdsi https://www.theregister.com/2021/10/19/intel_sdsi/ https://www.phoronix.com/scan.php?page=news_item&px=Intel-SDSi-Platform-x86-Queued https://lwn.net/Articles/884876/ https://www.phoronix.com/scan.php?page=news_item&px=Intel-Software-Defined-Silicon https://lore.kernel.org/all/20210924213157.3584061-2-david.e.box@linux.intel... The SDSi driver provides an interface for applications to provision an "authentication key certificate" that's written to memory and used to authenticate a "capability activation payload".