On 27 April 2015 at 14:41, Christoffer Dall <christoffer.d...@linaro.org> wrote: > Regarding adding support for the security extensions later, I assume the > QEMU-specifics will be to add a flag to the device instantiation from > the containing board activating security support, which would grow the > IO region size of this device from 4K to 8K for an adjacent secure > register frame and adjust the offsets. I cannot think of a reason why > that wouldn't work backwards-compatibly?
I think you'd probably want to add a second MMIO region rather than making the first one double-size. I don't think there's anything in the spec that mandates them being adjacent. You also need to allocate more interrupt lines. I think this should all be backwards-compatible, yes. thanks -- PMM
