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Violators will be prosecuted; Wed, 16 May 2018 04:45:43 -0600 Received: from b03ledav001.gho.boulder.ibm.com (b03ledav001.gho.boulder.ibm.com [9.17.130.232]) by b03cxnp08025.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w4GAjg8X21889310; Wed, 16 May 2018 03:45:42 -0700 Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1DB186E038; Wed, 16 May 2018 04:45:42 -0600 (MDT) Received: from oc8043147753.ibm.com (unknown [9.80.200.126]) by b03ledav001.gho.boulder.ibm.com (Postfix) with ESMTP id 4CAF66E035; Wed, 16 May 2018 04:45:38 -0600 (MDT) Subject: Re: [PATCH v5 01/13] KVM: s390: Interface to test whether APXA installed To: Cornelia Huck Cc: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.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, pasic@linux.vnet.ibm.com, berrange@redhat.com, fiuczy@linux.vnet.ibm.com, buendgen@de.ibm.com References: <1525705912-12815-1-git-send-email-akrowiak@linux.vnet.ibm.com> <1525705912-12815-2-git-send-email-akrowiak@linux.vnet.ibm.com> <20180516122116.4c3b10a1.cohuck@redhat.com> From: Tony Krowiak Date: Wed, 16 May 2018 06:45:38 -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: <20180516122116.4c3b10a1.cohuck@redhat.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-TM-AS-GCONF: 00 x-cbid: 18051610-0028-0000-0000-000009A07BD5 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009034; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000260; SDB=6.01033088; UDB=6.00528206; IPR=6.00812219; MB=3.00021142; MTD=3.00000008; XFM=3.00000015; UTC=2018-05-16 10:45:46 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18051610-0029-0000-0000-00003AD94E9E Message-Id: <20e26cf4-84fe-b681-15e9-59bc113a3828@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-05-16_04:,, 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-1805160109 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/16/2018 06:21 AM, Cornelia Huck wrote: > On Mon, 7 May 2018 11:11:40 -0400 > Tony Krowiak wrote: > >> Relocates an existing static function that tests whether >> the AP extended addressing facility (APXA) is installed on >> the linux host. The primary reason for relocating this >> function is because a new compilation unit (arch/s390/kvm/kvm-ap.c) >> is being created to contain all of the interfaces and logic >> for configuring an AP matrix for a KVM guest. Some of its >> functions will also need to determine whether APXA is installed, >> so, let's go ahead and relocate this static function as a >> public interface in kvm-ap.c. >> >> Notes: >> ---- >> 1. The interface to determine whether APXA is installed on the linux >> host the information returned from the AP Query Configuration >> Information (QCI) function. This function will not be available >> if the AP instructions are not installed on the linux host, so a check >> will be included to verify that. >> >> 2. Currently, the AP bus interfaces accessing the AP instructions will >> not be accessible if CONFIG_ZCRYPT=n, so the relevant code will be >> temporarily contained in the new arch/s390/kvm/kvm-ap.c file until >> the patch(es) to statically build the required AP bus interfaces are >> available. > Any ETA for those interfaces? Would be nice if we could avoid > introducing temporary interfaces (but I'm certainly not opposing this > patch). I'll check with the developer. > >> Signed-off-by: Tony Krowiak >> --- >> MAINTAINERS | 1 + >> arch/s390/include/asm/kvm-ap.h | 60 +++++++++++++++++++++++++++++ >> arch/s390/kvm/Makefile | 2 +- >> arch/s390/kvm/kvm-ap.c | 83 ++++++++++++++++++++++++++++++++++++++++ >> arch/s390/kvm/kvm-s390.c | 42 +------------------- >> 5 files changed, 147 insertions(+), 41 deletions(-) >> create mode 100644 arch/s390/include/asm/kvm-ap.h >> create mode 100644 arch/s390/kvm/kvm-ap.c >> >> diff --git a/MAINTAINERS b/MAINTAINERS >> index eab763f..224e97b 100644 >> --- a/MAINTAINERS >> +++ b/MAINTAINERS >> @@ -7792,6 +7792,7 @@ M: Christian Borntraeger >> M: Janosch Frank >> R: David Hildenbrand >> R: Cornelia Huck >> +R: Tony Krowiak > Don't you want to drop the 'vnet' from your address, as the vnet-less > form seems to be the one that will continue working from what I've > heard? > >> L: linux-s390@vger.kernel.org >> W: http://www.ibm.com/developerworks/linux/linux390/ >> T: git git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux.git > No objection against this patch, although I still hope it will not be > needed :) >