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
