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From: khilman@baylibre.com (Kevin Hilman)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] drivers: perf: arm: implement CPU_PM notifier
Date: Wed, 24 Feb 2016 17:10:20 -0800	[thread overview]
Message-ID: <7hsi0hr3wj.fsf@baylibre.com> (raw)
In-Reply-To: <1456251759-24768-1-git-send-email-lorenzo.pieralisi@arm.com> (Lorenzo Pieralisi's message of "Tue, 23 Feb 2016 18:22:39 +0000")

Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> writes:

> When a CPU is suspended (either through suspend-to-RAM or CPUidle),
> its PMU registers content can be lost, which means that counters
> registers values that were initialized on power down entry have to be
> reprogrammed on power-up to make sure the counters set-up is preserved

This assumes that the PMUs are always sharing a power rail with a
specific CPU, not the cluster.  Is that a reliable assumption?

Kevin

  parent reply	other threads:[~2016-02-25  1:10 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-23 18:22 [PATCH] drivers: perf: arm: implement CPU_PM notifier Lorenzo Pieralisi
2016-02-24 16:20 ` Mathieu Poirier
2016-02-24 17:35   ` Lorenzo Pieralisi
2016-02-24 19:53     ` Ashwin Chaugule
2016-02-24 22:31       ` Lorenzo Pieralisi
2016-02-26  0:22         ` Ashwin Chaugule
2016-02-25 16:37     ` Mathieu Poirier
2016-02-25  1:10 ` Kevin Hilman [this message]
2016-02-25  9:44   ` Lorenzo Pieralisi
2016-02-25 16:32     ` Mathieu Poirier
2016-02-25 16:43       ` Will Deacon
2016-02-25 18:46         ` Lorenzo Pieralisi
2016-02-25 21:55         ` Kevin Hilman

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