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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 <email@example.com> Signed-off-by: Marcelo Tosatti <firstname.lastname@example.org>
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