tree 5252086b8224c588148af6a48618030aa6e4827a
parent 3f31ae121348afd9ed39700ea2a63c17cd7eeed1
author Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com> 1331051865 +0100
committer Russell King <rmk+kernel@arm.linux.org.uk> 1331113250 +0000

ARM: 7358/1: perf: add PMU hotplug notifier

When a CPU is taken out of reset, either cold booted or hotplugged in,
some of its PMU registers can contain UNKNOWN values.

This patch adds a hotplug notifier to ARM core perf code so that upon
CPU restart the PMU unit is reset and becomes ready to use again.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>