Right now with the big mysterious security vulnerability causing the rush of the x86 PTI (Page Table Isolation) work that landed in the mainline Linux kernel days ago it’s believed to be a problem only affecting Intel CPUs. But at least for now the mainline Linux kernel is still treating AMD CPUs as “insecure” and is too taking a performance hit…

Source: Phoronix – For Now At Least AMD CPUs Are Also Reported As “Insecure”