Re: [PATCH v2 3/8] irqchip/apple-aic: Add cpumasks for E and P cores

[Hector Martin]

On 04/12/2021 01.32, Marc Zyngier wrote:
> On Wed, 01 Dec 2021 16:08:13 +0000,
> Mark Rutland <mark.rutland@xxxxxxx> wrote:
> > On Wed, Dec 01, 2021 at 01:49:04PM +0000, Marc Zyngier wrote:
> > > In order to be able to tell the core IRQ code about the affinity
> > > of the PMU interrupt in later patches, compute the cpumasks of the
> > > P and E cores at boot time.
> > >
> > > This relies on the affinity scheme used by the vendor, which seems
> > > to work for the couple of SoCs that are out in the wild.
> >
> > ... but may change at any arbitrary point in future?
>
> Crystal balls are in short supply, sorry! ;-)

Considering Apple seem to rely on this all over the place, I think they 
probably won't be changing the meaning of Aff2 at least until they 
decide to come up with SoCs that have 3 types of cores, or something 
like that :)

But yeah, ultimately this is a guess.

--
Hector Martin (marcan@xxxxxxxxx)
Public Key: https://mrcn.st/pub