Messages in this thread | | | Subject | Re: [PATCH] ARM: dts: exynos: add cpu perf counters to Exynos54xx boards | From | Robin Murphy <> | Date | Fri, 20 Oct 2017 17:15:51 +0100 |
| |
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@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel >
| |