tree b163d427c9dcff066330d4ac13de529a9831a044
parent 37ecb257f68ce4fb7c7048a1123bbcbbe36d9575
author Alexander Graf <agraf@suse.de> 1357319568 +0100
committer Alexander Graf <agraf@suse.de> 1357821751 +0100

KVM: PPC: BookE: Implement EPR exit

The External Proxy Facility in FSL BookE chips allows the interrupt
controller to automatically acknowledge an interrupt as soon as a
core gets its pending external interrupt delivered.

Today, user space implements the interrupt controller, so we need to
check on it during such a cycle.

This patch implements logic for user space to enable EPR exiting,
disable EPR exiting and EPR exiting itself, so that user space can
acknowledge an interrupt when an external interrupt has successfully
been delivered into the guest vcpu.

Signed-off-by: Alexander Graf <agraf@suse.de>