Re: [PATCH v8 1/5] Documentation: add sbsa-gwdt driver documentation

[Mark Rutland <mark.rutland@arm.com>]

On Fri, Oct 30, 2015 at 01:53:24PM -0500, Timur Tabi wrote:
> On 10/30/2015 01:35 PM, Fu Wei wrote:
> >>I think maybe Mark was asking why WS1 is optional, not the WS1
> >My answer is for "why WS1 is optional"!
> >
> >>>interrupt.  Maybe you can reword the documentation to make is clear
> >>>that
> >I didn't say : "only the*interrupt*  for WS1 is optional."
> 
> WS1 itself is not optional.  The spec says that WS0 and WS1 are
> separate events, and doesn't saying anything about either being
> optional.  The *interrupt* for WS1, however, is optional.

This is a moot point. The distintion between the signal and the
interrupt doens't matter here.

I was only asking why the interrupt was optional, and it seems per the
spec it's expected to be handed to an agent at a higher exception level.

That implies that the OS should only care about WS0, assuming that I've
understood correctly.

Thanks,
Mark.