On 1 November 2016 at 14:50, Christoffer Dall
[off-list ref] wrote:

On Tue, Nov 01, 2016 at 11:26:54AM +0000, Peter Maydell wrote:

quoted

Possible current and future outbound interrupt lines (some of these
would only show up in some unlikely or lots-of-implementation-needed
cases, I'm just trying to produce an exhaustive list):
 * virtual timer
 * physical timer
 * hyp timer (nested virtualization case)
 * secure timer (unlikely but maybe if EL3 is ever supported inside a VM)
 * gic maintenance interrupt (nested virt again)
 * PMU interrupt

Thanks for the list, that's good to have around for the future.

There's also the potential of the EL2 virtual timer for nested VHE
support, right?

That's the one I meant by "hyp timer".

quoted

The kernel doesn't know which interrupt number these would be wired
up to, so they're all just arbitrary outputs, and you could put them
in one field or split them up into multiple fields, it doesn't make
much difference.

So if we keep this we're kind of suggesting that we'll have a field per
device type later on.  Since this is a u8 and we are talking about up 5
5 timers already,

4.

there's not much waste currently, and we have plenty
of padding.  I suppose we an always add a 'other_devices' thing later,
so I prefer just sticking with this one for now.

Yeah, it's not a big deal either way.

thanks
-- PMM