On Fri, Aug 20, 2021 at 08:43:47AM +0000, David Laight wrote: > Hmmm... > If Linux needs its own IDT then temporarily substituting the old IDT > prior to a UEFI call will cause 'grief' if a 'Linux' interrupt > happens during the UEFI call. This is neede only during very early boot before Linux called ExitBootServices(). Nothing that causes IRQs is set up by Linux yet. Of course the Firmware could have set something up, but Linux runs with IRQs disabled when on its own IDT at that stage. Regards, Joerg
