[OASIS Issue Tracker] Commented: (VIRTIO-43) ccw: Support for adapter interrupts.

[ http://tools.oasis-open.org/issues/browse/VIRTIO-43?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=35165#action_35165 ] 

Cornelia Huck commented on VIRTIO-43:
-------------------------------------

A previous incarnation of this support had been posted here: http://www.spinics.net/lists/linux-virtualization/msg20734.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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