Yes, RHEL too (and probably apple). The Intel engineer in that email seems to be bragging about it: I think we also want to expose IBRS to VM guests, even

Yes, RHEL too (and probably apple). The Intel engineer in that email seems to be bragging about it: I think we also want to expose IBRS to VM guests, even if we don't use it ourselves. Because Windows guests (and RHEL guests; yay!) do use it.