Messages in this thread | | | Date | Mon, 20 Oct 2014 10:20:05 +0100 | From | Will Deacon <> | Subject | Re: [PATCH v4] ARM: perf: save/restore pmu registers in pm notifier |
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On Mon, Oct 20, 2014 at 10:16:16AM +0100, Sudeep Holla wrote: > On 20/10/14 09:46, Neil Zhang wrote: > > Will, I prefer to check always-on field under PMU node to check > > whether we need Save/restore them. > > > But how do you handle it for different idle states. e.g. if CPU is in > retention, PMU's *might be* retained. Also I don't think PMUs will be > placed in "always-on" power domain like timers. So using "always-on" > sounds incorrect to me.
Adding Mathieu to CC, since I spoke to him at LPC about this and he was talking about implementing proper PM domain descriptions for coresight components.
Will
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