linux-kernel - Re: [PATCH v4 05/15] KVM: s390: enable/disable AP interpretive execution

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Message-Id: <dbd7a1fa-a5c4-a931-5606-e9e2301589f2@linux.vnet.ibm.com>
Date:   Mon, 16 Apr 2018 13:12:48 +0200
From:   Halil Pasic <pasic@...ux.vnet.ibm.com>
To:     Tony Krowiak <akrowiak@...ux.vnet.ibm.com>,
        linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Cc:     freude@...ibm.com, schwidefsky@...ibm.com,
        heiko.carstens@...ibm.com, borntraeger@...ibm.com,
        cohuck@...hat.com, kwankhede@...dia.com,
        bjsdjshi@...ux.vnet.ibm.com, pbonzini@...hat.com,
        alex.williamson@...hat.com, pmorel@...ux.vnet.ibm.com,
        alifm@...ux.vnet.ibm.com, mjrosato@...ux.vnet.ibm.com,
        jjherne@...ux.vnet.ibm.com, thuth@...hat.com, berrange@...hat.com,
        fiuczy@...ux.vnet.ibm.com, buendgen@...ibm.com
Subject: Re: [PATCH v4 05/15] KVM: s390: enable/disable AP interpretive
 execution



On 04/15/2018 11:22 PM, Tony Krowiak wrote:
> The VFIO AP device model exploits interpretive execution of AP
> instructions (APIE) to provide guests passthrough access to AP
> devices. This patch introduces a new interface to enable and
> disable APIE.
> 
> Signed-off-by: Tony Krowiak <akrowiak@...ux.vnet.ibm.com>

LGTM, but should be squashed into #4. (Like this you have a
kernel that supports the cpu model feature 'ap' but does not
do 'interpretation is default'.)