tree f582eb7dc28567929d6a54185a53fac1036341bf
parent 94a15de8fb2667791d66c49610676ea2add90034
author David Hildenbrand <dahi@linux.vnet.ibm.com> 1436294375 +0200
committer Christian Borntraeger <borntraeger@de.ibm.com> 1466495026 +0200

KVM: s390: vsie: speed up VCPU external calls

Whenever a SIGP external call is injected via the SIGP external call
interpretation facility, the VCPU is not kicked. When a VCPU is currently
in the VSIE, the external call might not be processed immediately.

Therefore we have to provoke partial execution exceptions, which leads to a
kick of the VCPU and therefore also kick out of VSIE. This is done by
simulating the WAIT state. This bit has no other side effects.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>