From: robin.murphy@arm.com (Robin Murphy)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: dts: exynos: add cpu perf counters to Exynos54xx boards
Date: Fri, 20 Oct 2017 17:15:51 +0100 [thread overview]
Message-ID: <e2b87fe2-bc04-242d-8f4f-9cd21743e3aa@arm.com> (raw)
In-Reply-To: <CAM3PiRxi8sxf6T990K8rd7UsOLd2D5TaLciF=c_wF=9gmpLKYg@mail.gmail.com>
On 20/10/17 13:09, Marian Mihailescu wrote:
> Hi,
>
> This patch enables support for ARM Performance Monitoring Units
> available in Cortex-A7
> and Cortex-A15 CPU cores for Exynos54xx SoCs (5410, 5420 and 5422/5800).
>
> Exynos5410 currently has only Cortex-A7 nodes defined in the device tree,
> so the Cortex-A15 PMU is defined in the exynos5420 device tree file.
Huh? 5410 only has the *A15* cluster described (and for whatever reason
mainline cannot bring up the A7 cluster even if you do add it).
Also*, the interrupt affinity properties are bogus as presented - those
will need to be delegated to the SoC-variant-specific dtsi files in the
same manner as the "cpus" nodes, to cope with the different CPU numberings.
Robin.
*I'd like to have made this comment inline in the patch, but I can't :(
> Tested with perf on Odroid XU4 (Exynos5422):
> armv7_cortex_a7 PMU driver: 5 counters available
> armv7_cortex_a15 PMU driver: 7 counters available
>
> Regards,
> Marian
>
> --
> Either I've been missing something or nothing has been going on. (K. E. Gordon)
>
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
next prev parent reply other threads:[~2017-10-20 16:15 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-20 12:09 [PATCH] ARM: dts: exynos: add cpu perf counters to Exynos54xx boards Marian Mihailescu
2017-10-20 12:21 ` Krzysztof Kozlowski
2017-10-20 16:15 ` Robin Murphy [this message]
2017-10-21 7:24 ` Marian Mihailescu
2017-10-21 20:14 ` Krzysztof Kozlowski
-- strict thread matches above, loose matches on Subject: below --
2017-10-20 12:49 memeka
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