From: Liu Ping Fan <kernelfans@gmail.com>
Date: Tue, 19 Nov 2013 06:12:48 +0000 (+0800)
Subject: powerpc: kvm: optimize "sc 1" as fast return
X-Git-Tag: v3.14-rc1~26^2^2~35
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=27025a602cb9d8b0fa5162b465334ef059a503b6;p=pandora-kernel.git

powerpc: kvm: optimize "sc 1" as fast return

In some scene, e.g openstack CI, PR guest can trigger "sc 1" frequently,
this patch optimizes the path by directly delivering BOOK3S_INTERRUPT_SYSCALL
to HV guest, so powernv can return to HV guest without heavy exit, i.e,
no need to swap TLB, HTAB,.. etc

Signed-off-by: Liu Ping Fan <pingfank@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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