Cannonlake/Icelake Desktop CPUs Won't Have PKU Memory Protection Support

Support for Memory Protection Keys (a.k.a. PKU / PKEYs) was finished up this year in the Linux kernel, glibc, and related components. This memory protection feature premiered with Intel Xeon Scalable CPUs and is said to be coming to future desktop CPUs, but it doesn't look like that's happening for the Cannonlake or Icelake generations...