Off-by-default, which remains the recommendation of AMD. https://www.phoronix.com/scan.php?page=article&item=if-amd-kpti&num=1 https://www.phoronix.com/scan.ph

Off-by-default, which remains the recommendation of AMD. https://www.phoronix.com/scan.php?page=article&item=if-amd-kpti&num=1 https://www.phoronix.com/scan.php?page=article&item=if-amd-k... Some googling suggests that flag is whether the kernel is compiled with support, not whether it's turned on. You'd need to force boot flag "pti=on" for an AMD system. Postmark or a database benchmark would be a good bench for you to compare, probably. (apparently "kpti=on" is aarch64-specific, other uarchs use "pti" instead, seems kind of odd)