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From: Suzuki K Poulose <suzuki.poulose@arm.com>
To: andrew.murray@arm.com, mathieu.poirier@linaro.org
Cc: alexander.shishkin@linux.intel.com, mike.leach@linaro.org,
	Al.Grant@arm.com, linux-arm-kernel@lists.infradead.org,
	Sudeep.Holla@arm.com
Subject: Re: [PATCH v1 5/5] coresight: etm4x: save/restore state across CPU low power states
Date: Thu, 20 Jun 2019 18:00:48 +0100	[thread overview]
Message-ID: <9adb65af-a898-462b-ecbc-af972d9331a6@arm.com> (raw)
In-Reply-To: <20190620165427.GH20984@e119886-lin.cambridge.arm.com>



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"

or something better long the line.

Cheers
Suzuki

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  reply	other threads:[~2019-06-20 17:00 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 [this message]
2019-06-20 17:10                         ` Mathieu Poirier
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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