On Mon, Jul 18, 2022 at 10:59:18AM -0300, Thadeu Lima de Souza Cascardo wrote: > And I think you nailed what I had in mind for using IBPB when doing firmware > calls, and perhaps this is wanted even when we ignore this naked RET here. > > There is a typo on your patch below, but I will give it a try and see if it > doesn't blow up on AMD systems without IBPB (by way of emulation). Yeah, Boris pointed out the same. Typing is hard ;-)