[ http://tools.oasis-open.org/issues/browse/VIRTIO-43?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=35418#action_35418 ]
Cornelia Huck commented on VIRTIO-43:
-------------------------------------
Current proposal: https://lists.oasis-open.org/archives/virtio/201310/msg00160.html
> ccw: Support for adapter interrupts.
> ------------------------------------
>
> Key: VIRTIO-43
> URL: http://tools.oasis-open.org/issues/browse/VIRTIO-43
> Project: OASIS Virtual I/O Device (VIRTIO) TC
> Issue Type: New Feature
> Reporter: Cornelia Huck
>
> We want to be able to use adapter interrupts instead of classic I/O interrupts for virtio-ccw for several reasons:
> - Less exits, since we don't need TEST SUBCHANNEL for every interrupt and can coalesce interrupts for different devices
> - Common guest code with zPCI
> - Ability to make use of irqfds
> For this, we need a new channel command to set up two-stage indicator bits.
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