KVM: s390: vsie: speed up VCPU external calls

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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>

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David Hildenbrand 2015-07-07 20:39:35 +02:00 • committed by Christian Borntraeger

parent 94a15de8fb

commit b917ae573f

1 changed files with 6 additions and 0 deletions

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arch/s390/kvm/vsie.c

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