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

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Message-Id: <20190128175910.5d9677e7@oc2783563651>
Date:   Mon, 28 Jan 2019 17:59:10 +0100
From:   Halil Pasic <pasic@...ux.ibm.com>
To:     Michael Mueller <mimu@...ux.ibm.com>
Cc:     KVM Mailing List <kvm@...r.kernel.org>,
        Linux-S390 Mailing List <linux-s390@...r.kernel.org>,
        linux-kernel@...r.kernel.org,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        David Hildenbrand <david@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Pierre Morel <pmorel@...ux.ibm.com>
Subject: Re: [PATCH v6 09/13] KVM: s390: add the GIB and its related
 life-cyle functions

On Thu, 24 Jan 2019 13:59:35 +0100
Michael Mueller <mimu@...ux.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@...ux.ibm.com>
> Reviewed-by: Janosch Frank <frankja@...ux.ibm.com>
> Reviewed-by: Christian Borntraeger <borntraeger@...ibm.com>
> Reviewed-by: Cornelia Huck <cohuck@...hat.com>
> Reviewed-by: Pierre Morel <pmorel@...ux.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@...ux.ibm.com>

[..]