On Fri, Aug 30, 2019 at 07:37:41AM +0000, Peng Fan wrote: > Hi Jassi, > > > I think there could be channel for TEE, and channel for Linux. > > > For virtualization case, there could be dedicated channel for each VM. > > > > > I am talking from Linux pov. Functions 0xfe and 0xff above, can't both be > > active at the same time, right? > > If I get your point correctly, > On UP, both could not be active. On SMP, tx/rx could be both active, anyway > this depends on secure firmware and Linux firmware design. > Just to confirm, we can't have SMC/HVC based Rx channel as there's no *architectural* way to achieve it. So it can be based on some interrupt from secure side and hence will be a *different* type of channel/controller. Sorry to make this point repeatedly, but juts to be absolutely clear: as it stands, SMC/HVC can be used only for Tx today. -- Regards, Sudeep
