From: Konstantin Weitz <WEITZKON@de.ibm.com>
Date: Wed, 25 Apr 2012 13:30:38 +0000 (+0200)
Subject: KVM: s390: Implement the directed yield (diag 9c) hypervisor call for KVM
X-Git-Tag: v3.5-rc1~88^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=41628d334361670d825fb03c04568f5ef9f084dc;p=pandora-kernel.git

KVM: s390: Implement the directed yield (diag 9c) hypervisor call for KVM

This patch implements the directed yield hypercall found on other
System z hypervisors. It delegates execution time to the virtual cpu
specified in the instruction's parameter.

Useful to avoid long spinlock waits in the guest.

Christian Borntraeger: moved common code in virt/kvm/

Signed-off-by: Konstantin Weitz <WEITZKON@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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