Re: [PATCH] arm: bcm2835: Add the PMU to the devicetree.

[Eric Anholt]

Vince Weaver <vincent.weaver@xxxxxxxxx> writes:

> On Thu, 17 May 2018, Stefan Wahren wrote:
>
>> 
>> > Eric Anholt <eric@xxxxxxxxxx> hat am 17. Mai 2018 um 15:17 geschrieben:
>> > 
>> > 
>> > The a53 and a7 counters seem to match up, so we advertise a7 so that
>> > arm32 can probe.
>
> so how closely did you look at the a53/a7 differences?  I see some major 
> differences, especially with the CPU_CYCLES event (0xff vs 0x11).

I'm a bit lost in the code, but it seemed like the 0xff was a
placeholder for a bit of special behavior, but that the cpu_cycles ->
ARMV7_PERFCTR_CLOCK_CYCLES mapping got you that same value in the end.

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