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Violators will be prosecuted; Tue, 17 Apr 2018 11:11:56 -0400 Received: from b01ledav002.gho.pok.ibm.com (b01ledav002.gho.pok.ibm.com [9.57.199.107]) by b01cxnp22033.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w3HFBtXS48038082; Tue, 17 Apr 2018 15:11:55 GMT Received: from b01ledav002.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 68B42124044; Tue, 17 Apr 2018 12:13:57 -0400 (EDT) Received: from oc8043147753.ibm.com (unknown [9.85.136.174]) by b01ledav002.gho.pok.ibm.com (Postfix) with ESMTP id 11EF3124047; Tue, 17 Apr 2018 12:13:55 -0400 (EDT) Subject: Re: [PATCH v4 05/15] KVM: s390: enable/disable AP interpretive execution To: Halil Pasic , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, akrowiak@linux.vnet.ibm.com Cc: freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.com, kwankhede@nvidia.com, bjsdjshi@linux.vnet.ibm.com, pbonzini@redhat.com, alex.williamson@redhat.com, pmorel@linux.vnet.ibm.com, alifm@linux.vnet.ibm.com, mjrosato@linux.vnet.ibm.com, jjherne@linux.vnet.ibm.com, thuth@redhat.com, berrange@redhat.com, fiuczy@linux.vnet.ibm.com, buendgen@de.ibm.com References: <1523827345-11600-1-git-send-email-akrowiak@linux.vnet.ibm.com> <1523827345-11600-6-git-send-email-akrowiak@linux.vnet.ibm.com> From: Tony Krowiak Date: Tue, 17 Apr 2018 11:11:53 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-TM-AS-GCONF: 00 x-cbid: 18041715-0008-0000-0000-000002F8FDDD X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00008871; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000257; SDB=6.01019261; UDB=6.00519973; IPR=6.00798503; MB=3.00020618; MTD=3.00000008; XFM=3.00000015; UTC=2018-04-17 15:11:58 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18041715-0009-0000-0000-000038EF4787 Message-Id: <71625879-b5cd-ee0a-8259-0ac1e1eb5180@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-04-17_08:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1804170135 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/16/2018 07:12 AM, Halil Pasic wrote: > > 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 > 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'.) Okay