On 29/11/16 14:51, Alexander Kochetkov wrote: > >> 29 нояб. 2016 г., в 17:32, Thomas Gleixner <[email protected]> написал(а): >> >> Can we just disable that global timer on affected SoCs and use something >> else instead? > > I’ve sent patch series for fixing that on rockchip SoC. > http://lists.infradead.org/pipermail/linux-rockchip/2016-November/013217.html > > But the series contain fix only for rk3188, because I don’t have another > rockchip > SoC. rk3288 and other could be easy fixed with dts files.
3288 (and probably anything newer) is irrelevant to this discussion, as it has the arch timer interface - that may be busted in other ways (such as not being correctly set up by firmware and not being always-on as it should), but frequency is not one of them. This only affects Cortex-A9/A5 based parts. > There are a lot of other platforms what probably use shed_clock and > clocksource form global-timer. Presumably it's only an issue if they also have cpufreq? > alexander@ubuntu:dts$ grep arm,cortex-a9-global-timer * > am4372.dtsi: compatible = "arm,cortex-a9-global-timer"; > artpec6.dtsi: compatible = "arm,cortex-a9-global-timer"; > bcm5301x.dtsi: compatible = > "arm,cortex-a9-global-timer"; > bcm63138.dtsi: compatible = > "arm,cortex-a9-global-timer"; > bcm-cygnus.dtsi: compatible = > "arm,cortex-a9-global-timer"; > bcm-nsp.dtsi: compatible = "arm,cortex-a9-global-timer"; > hip01.dtsi: compatible = "arm,cortex-a9-global-timer"; > rk3xxx.dtsi: compatible = "arm,cortex-a9-global-timer"; > stih407-family.dtsi: compatible = "arm,cortex-a9-global-timer"; > stih41x.dtsi: compatible = "arm,cortex-a9-global-timer"; > uniphier-common32.dtsi: compatible = > "arm,cortex-a9-global-timer"; > uniphier-ph1-sld3.dtsi: compatible = > "arm,cortex-a9-global-timer"; > vexpress-v2p-ca5s.dts: > "arm,cortex-a9-global-timer"; I can tell you that one, for one, is never used, because it depends on an input clock provided by the vexpress-osc driver which cannot be probed sufficiently early. Robin. > vf500.dtsi: compatible = > "arm,cortex-a9-global-timer"; > zx296702.dtsi: compatible = > "arm,cortex-a9-global-timer"; > zynq-7000.dtsi: compatible = > "arm,cortex-a9-global-timer»; > > Regards, > Alexander. > > > _______________________________________________ > linux-arm-kernel mailing list > [email protected] > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel >
