Re: [PATCH v6 09/13] KVM: s390: add the GIB and its related life-cyle functions

Halil Pasic
2019-01-28T16:59:10Z

On Thu, 24 Jan 2019 13:59:35 +0100
Michael Mueller <mimu@linux.ibm.com> wrote:

> The Guest Information Block (GIB) links the GISA of all guests
> that have adapter interrupts pending. These interrupts cannot be
> delivered because all vcpus of these guests are currently in WAIT
> state or have masked the respective Innterruption Sub Class (ISC).
> If enabled, a GIB alert is issued on the host to schedule these
> guests to run suitable vcpus to consume the pending interruptions.
>
> This mechanism allows to process adapter interrupts for currently
> not running guests.
>
> The GIB is created during host initialization and associated with
> the Adapter Interruption Facility in case an Adapter Interruption
> Virtualization Facility is available.
>
> The GIB initialization and thus the activation of the related code
> will be done in an upcoming patch of this series.
>
> Signed-off-by: Michael Mueller <mimu@linux.ibm.com>
> Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>

I don't agree with the commit message to 100%, but I'd rather not start
a discussion.

Acked-by: Halil Pasic <pasic@linux.ibm.com>

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