From: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Date: Fri, 19 Jul 2013 16:48:08 +0000 (+0100)
Subject: arm64: kernel: implement fpsimd CPU PM notifier
X-Git-Tag: v3.14-rc1~153^2~11^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fb1ab1ab3889fc23ed90e452502662311ebdf229;p=pandora-kernel.git

arm64: kernel: implement fpsimd CPU PM notifier

When a CPU enters a low power state, its FP register content is lost.
This patch adds a notifier to save the FP context on CPU shutdown
and restore it on CPU resume. The context is saved and restored only
if the suspending thread is not a kernel thread, mirroring the current
context switch behaviour.

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