From 60fc6942f6ac124503ed7f8506736a8f56b4ca7e Mon Sep 17 00:00:00 2001
From: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Date: Mon, 5 Aug 2013 15:20:35 +0100
Subject: [PATCH] arm64: kernel: implement HW breakpoints CPU PM notifier

When a CPU is shutdown either through CPU idle or suspend to RAM, the
content of HW breakpoint registers must be reset or restored to proper
values when CPU resume from low power states. This patch adds debug register
restore operations to the HW breakpoint control function and implements a
CPU PM notifier that allows to restore the content of HW breakpoint registers
to allow proper suspend/resume operations.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
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