From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Al Grant <Al.Grant@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Sudeep Holla <Sudeep.Holla@arm.com>,
Andrew Murray <andrew.murray@arm.com>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
Mike Leach <mike.leach@linaro.org>
Subject: Re: [PATCH v1 5/5] coresight: etm4x: save/restore state across CPU low power states
Date: Thu, 20 Jun 2019 11:10:26 -0600 [thread overview]
Message-ID: <CANLsYkzdyMczBHfRJtVxR90kMCJW-aHVEFZ0EVUN657g0PV=Rg@mail.gmail.com> (raw)
In-Reply-To: <9adb65af-a898-462b-ecbc-af972d9331a6@arm.com>
On Thu, 20 Jun 2019 at 11:00, Suzuki K Poulose <suzuki.poulose@arm.com> wrote:
>
>
>
> On 20/06/2019 17:54, Andrew Murray wrote:
> > On Thu, Jun 20, 2019 at 10:47:38AM -0600, Mathieu Poirier wrote:
> >> On Thu, 20 Jun 2019 at 10:34, Sudeep Holla <sudeep.holla@arm.com> wrote:
> >>>
> >>> On Thu, Jun 20, 2019 at 10:14:04AM -0600, Mathieu Poirier wrote:
> >>>> On Thu, 20 Jun 2019 at 09:41, Sudeep Holla <sudeep.holla@arm.com> wrote:
>
> ...
>
> >> Then all we have to do is make the ACPI/DT property that indicate the
> >> method used to deal with tracer idling mandatory. That way people are
> >> conscious of the choice they are making. To be backward compatible
> >> with current systems we default to the TRCPDCR.PU method but print a
> >> warning message, just like we do for obsolete DT bindings.
> >
> > I'll respin the series based on this approach. I'll also flip the
> > 'disable_pm_save' module option to 'enable_pm_save' - thus allowing any
> > one to use software save/restore if they wish.
>
> If you are going to add a firmware property, please get a consensus on the
> name here, before respinning to avoid another churn :-). How about one of :
>
> "arm,coresight-etm-looses-state"
> "arm,coresight-etm-needs-save-restore"
"arm,coresight-needs-save-restore"
That way we can also use it for CTI.
>
> or something better long the line.
>
> Cheers
> Suzuki
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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next prev parent reply other threads:[~2019-06-20 17:10 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-18 12:54 [PATCH v1 0/5] coresight: etm4x: save/restore ETMv4 context across CPU low power states Andrew Murray
2019-06-18 12:54 ` [PATCH v1 1/5] coresight: etm4x: remove superfluous setting of os_unlock Andrew Murray
2019-06-19 10:42 ` Suzuki K Poulose
2019-06-18 12:54 ` [PATCH v1 2/5] coresight: etm4x: use explicit barriers on enable/disable Andrew Murray
2019-06-18 22:34 ` Mathieu Poirier
2019-06-19 8:32 ` Suzuki K Poulose
2019-06-20 10:25 ` Andrew Murray
2019-06-18 12:54 ` [PATCH v1 3/5] coresight: etm4x: use octal permissions for module_params Andrew Murray
2019-06-19 10:43 ` Suzuki K Poulose
2019-06-18 12:54 ` [PATCH v1 4/5] coresight: etm4x: improve clarity of etm4_os_unlock comment Andrew Murray
2019-06-19 10:46 ` Suzuki K Poulose
2019-06-20 10:29 ` Andrew Murray
2019-06-18 12:54 ` [PATCH v1 5/5] coresight: etm4x: save/restore state across CPU low power states Andrew Murray
2019-06-18 13:21 ` Sudeep Holla
2019-06-19 10:38 ` Suzuki K Poulose
2019-06-19 11:07 ` Sudeep Holla
2019-06-19 16:22 ` Mathieu Poirier
2019-06-20 11:41 ` Andrew Murray
2019-06-20 14:55 ` Mathieu Poirier
2019-06-20 15:41 ` Sudeep Holla
2019-06-20 16:14 ` Mathieu Poirier
2019-06-20 16:34 ` Sudeep Holla
2019-06-20 16:47 ` Mathieu Poirier
2019-06-20 16:52 ` Sudeep Holla
2019-06-20 16:54 ` Andrew Murray
2019-06-20 17:00 ` Suzuki K Poulose
2019-06-20 17:10 ` Mathieu Poirier [this message]
2019-06-21 9:29 ` Andrew Murray
2019-06-21 15:30 ` Mathieu Poirier
2019-06-20 17:11 ` Sudeep Holla
2019-06-20 18:00 ` Mathieu Poirier
2019-06-20 16:48 ` Sudeep Holla
2019-06-18 22:55 ` Mathieu Poirier
2019-06-20 11:07 ` Andrew Murray
2019-06-20 14:49 ` Mathieu Poirier
2019-06-20 15:11 ` Andrew Murray
2019-06-20 15:26 ` Mathieu Poirier
2019-06-25 10:07 ` Suzuki K Poulose
2019-06-25 19:57 ` Mathieu Poirier
2019-06-26 10:21 ` Mike Leach
2019-06-26 16:57 ` Mathieu Poirier
2019-06-27 8:12 ` Andrew Murray
2019-06-27 8:17 ` Andrew Murray
2019-06-20 16:45 ` [PATCH v1 0/5] coresight: etm4x: save/restore ETMv4 context " Suzuki K Poulose
2019-06-20 16:57 ` Andrew Murray
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