From: "Theo de Raadt" Subject: Re: cpu_xcall glue for arm64 To: Mark Kettenis Cc: david@gwynne.id.au, tech@openbsd.org Date: Tue, 22 Jul 2025 10:19:51 -0600 Mark Kettenis wrote: > > That is my thought also. If this is impossible to use without setting > > an option, then noone will use it. If noone is using it, then why have > > the code at all? I think we want it, because we know we need it (soon). > > Actually xcall isn't an option; it is an attribute. Drivers that need > the functionality ask for it by adding it as a dependency. It is no > different than framebuffer drivers depending on rasops for example. > So the question really is whether we intend to use this functionality > in generic code or not. For now all the places where we intend to use > this are MD drivers. That is surprising. I was pretty sure the uses would either be in MD code only, or in MI /sys/kern /sys/net*, and /sys/uvm I would be very surprised to see it used in MI drivers.