tree e75540da487021a89a933c0451635529d98c2915
parent 95322526ef62b84adb469c27535ab0252a369a85
author Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> 1374252488 +0100
committer Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> 1387214252 +0000

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>