Messages in this thread | | | Subject | Re: [PATCH v2 3/8] irqchip/apple-aic: Add cpumasks for E and P cores | From | Hector Martin <> | Date | Sun, 12 Dec 2021 16:22:00 +0900 |
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On 04/12/2021 01.32, Marc Zyngier wrote: > On Wed, 01 Dec 2021 16:08:13 +0000, > Mark Rutland <mark.rutland@arm.com> 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@marcan.st) Public Key: https://mrcn.st/pub
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