Messages in this thread | | | Date | Mon, 20 Oct 2014 11:41:22 +0200 | Subject | Re: [PATCH v4] ARM: perf: save/restore pmu registers in pm notifier | From | Geert Uytterhoeven <> |
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On Mon, Oct 20, 2014 at 11:20 AM, Will Deacon <will.deacon@arm.com> wrote: > 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.
Good to hear that!
Gr{oetje,eeting}s,
Geert (who skipped LPC)
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
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