AMD CPU Microcode Fix For Linux To Patch Every Logical Thread Nears Mainline

Back in August I wrote about a patch to change AMD's CPU microcode loading on Linux to now patch every logical CPU thread rather than just per physical core. It turned out that at least some CPU microcode updates do make per-thread modifications while the Linux kernel microcode handling for AMD was just applying microcode updates at run-time on a per-core basis. That patch was seemingly forgotten about but has now been queued up as part of x86 "urgent" changes for the mainline kernel...