Linux Prepares Straight Line Speculation "SLS" Mitigation For x86/x86_64 CPUs

Last month I reported on activity around Straight Line Speculation "SLS" mitigation for x86_64 CPUs, similar to the work carried out by Arm last year on their SLS vulnerability. That work on the x86 (x86_64 inclusive) side has now been merged to GCC 12 Git and a kernel patch is expected to come shortly that will flip it on as the latest CPU security protection...