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

[OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>]

     [ https://tools.oasis-open.org/issues/browse/VIRTIO-43?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Tsirkin updated VIRTIO-43:
----------------------------------

    Fix Version/s: virtio 1.0 csprd01

> ccw: Support for adapter interrupts.
> ------------------------------------
>
>                 Key: VIRTIO-43
>                 URL: https://tools.oasis-open.org/issues/browse/VIRTIO-43
>             Project: OASIS Virtual I/O Device (VIRTIO) TC
>          Issue Type: New Feature
>            Reporter: Cornelia Huck
>            Assignee: Cornelia Huck
>             Fix For: virtio 1.0 csprd01
>
>
> 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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