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


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