tree f96290e4e141305498fe5cb97a9efffc958c0d7a
parent 503cd0c50ac7161eb5c3891b48b620cb0a5521cd
author Michael S. Tsirkin <mst@redhat.com> 1362051196 +0100
committer Marcelo Tosatti <mtosatti@redhat.com> 1362521529 -0300

virtio_ccw: pass a cookie value to kvm hypercall

Lookups by channel/vq pair on host during virtio notifications might be
expensive.  Interpret hypercall return value as a cookie which host can
use to do device lookups for the next notification more efficiently.

[CH: Fix line > 80 chars]
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>